Combustor

The combustor comprises a shell, a combustion cone assembly and a secondary combustion cone, the combustion cone assembly is connected with the shell, the combustion cone assembly comprises a rotating cone and a powder fuel feeding pipe, the rotating cone is rotatably arranged in the shell and is provided with a combustion cavity, one end of the powder fuel feeding pipe is located outside the shell, and the other end of the powder fuel feeding pipe is located in the combustion cavity. The secondary combustion cone is provided with an exhaust channel communicated with the combustion cavity, the secondary combustion cone comprises a first combustion cone and a second combustion cone, the first combustion cone is arranged on the shell in a penetrating mode, and the part, located outside the shell, of the first combustion cone is provided with a blocky fuel inlet communicated with the exhaust channel. The second combustion cone is connected to the end, away from the shell, of the first combustion ...

Concentrated and dilute phase separator and combustor

The dense-phase flow separator comprises a bent pipe, a partition plate assembly and a draught fan, the bent pipe is provided with a gas inlet channel, a solid-gas two-phase flow inlet, a dense-phase flow outlet and a dilute-phase flow outlet, and the solid-gas two-phase flow inlet, the dense-phase flow outlet and the dilute-phase flow outlet communicate with the gas inlet channel. The partition plate assembly is arranged in the gas inlet channel and divides a part of the gas inlet channel into a concentrated phase flow channel and a dilute phase flow channel, the partition plate assembly comprises a first partition plate, a second partition plate and a third partition plate, and the first partition plate and the second partition plate are connected with the third partition plate in the first direction in a position adjustable mode; and the second partition plate is connected with the first partition plate and the second partition plate in a position adjustable mode in the inside-outside ...

Internal test method of application program, client and server

The invention provides an internal test method of an application program, a client and a server. The internal test method of the application program comprises the steps that: the client obtains a login request which is used for starting the application program to be tested; the client sends the obtained login request to the server, wherein the login request includes a login name; the client receives the verifying result fed back by the server; if the verifying result is that the login name is qualified for internal test, the client controls the login name to log in the application program to be tested, and displays a feedback prompt message for promoting the user to feed back experience information of the internal test.

Method and device for synchronizing playlists

The invention is applicable to the network technical field and provides a method and a device for synchronizing playlists. The method comprises the steps of detecting the operation of a user on the playlist of a first client, generating an operation code according to the operation of the user on the playlist of the first client, extracting identification information which comprises the user identification of the user or the GUID (Globally Unique Identifier) of the first client, and sending the operation code and the identification information to a server so that the server sends the operation code to a second client according to the identification information and then the second client performs synchronizing operation on the playlist of the second client according to the operation code. The method and the device realize automatic synchronization of the playlists and improve the instantaneity of synchronization of the playlists.

Method and apparatus for playlist synchronization

The present application is applicable to the field of network technologies, and provides method and apparatus for playlist synchronization, where the method includes: detecting a user operation on a playlist of multimedia documents at a first terminal; generating an operation code according to the user operation on the playlist, the operation code including an identifier of the playlist; extracting identification information, the identification information including a user identifier and a globally unique identifier (GUID) of the first terminal; and sending the operation code and the identification information to the server, wherein the server is configured to identify a second terminal according to the operation code and the identification information and send the operation code to the second terminal such that the second terminal can perform a synchronization operation to a playlist of multimedia documents at the second terminal according to the operation code.

Subject event updating method base and urban multi-source time-space information parallel updating method

The invention discloses a subject event updating method base and an urban multi-source time-space information parallel updating method. Suggested time-space information updating is related to multiple factors such as information sources, data models and dimension, updating methods, updating technological process, quality control and subject events, and a time-space database is updated on the basis of multi-source data integration and abnormal change discovery. On the basis of time-space database updating, a sudden event updating mechanism, an updating method based on subject event linkage and a GPU (Graphic Processing Unit) parallel acceleration updating algorithm are established, so that the dynamic information updating of urban time-space substances and time-space events is realized specific to the requirements of updating content and frequency of time-space information. The subject event updating method base and the urban multi-source time-space information parallel updating method has ...

KDP frequency doubling crystal structure

The KDP frequency doubling crystal structure comprises a crystal fixing structure, a KDP crystal, a pi polarization tube and a sigma polarization tube, pi polarized light with the central wavelength of 800nm passes through the Pi polarization tube and enters the KDP crystal, the Pi polarized light with the central wavelength of 800nm is subjected to frequency multiplication by the KDP crystal to form sigma polarized light with the central wavelength of 400nm, and finally the sigma polarized light is output from the sigma polarization tube. The inclined surfaces of the closed ends of the pi polarization tube and the sigma polarization tube adopt the Brewster angle design, and the KDP crystal is arranged in a vacuum closed tube cavity defined by the pi polarization tube, the sigma polarization tube and the crystal fixing structure, so that the complicated process of crystal coating is omitted, the deliquescence of the KDP crystal in the air is also avoided, and the service life of the KDP ...

Multi-stage regulation concentration separation device

The invention discloses a multi-stage regulation concentration separation device, the multi-stage regulation concentration separation device comprises a bend pipe body, a logarithmic spiral partition plate and a secondary concentration assembly, the bend pipe body comprises a separation pipe part, a primary concentration pipe part, a concentrated phase pipe part and a dilute phase pipe part, the logarithmic spiral partition plate is arranged in the first-stage concentration pipe part to define a concentrated phase flow channel and a dilute phase flow channel, the logarithmic spiral partition plate is provided with a plurality of concentration parts, each concentration part comprises an exhaust hole and a hinge, the hinge is arranged at the exhaust hole in a turnover mode, filter holes are formed in the peripheral wall of the concentrated phase pipe part, the second-stage concentration assembly comprises a filter screen and a shell, the filter screen is arranged in the filter holes, and ...

Combined column foot capable of being repaired in situ

The invention provides a combined column foot capable of being repaired in situ, which is good in anti-earthquake performance and capable of being rapidly repaired after an earthquake. The combined column foot comprises a steel plate bucket, a damper with one end connected to the outer side surface of the steel plate bucket, and a connection plate connected with the other end of the damper, wherein the connection plate is fixedly installed on a ground beam corresponding to a reinforced concrete column, the damper is provided with a detachable flexible steel plate, and the flexible steel plate is vertically placed. By arranging the damper (the flexible steel plate), in case of a small earthquake, the flexible steel plate used as an energy-consuming plate of the damper is capable of generating a concentrated deformation to absorb most of earthquake energy due to a relatively good plasticity; in case of a strong earthquake, the flexible steel plate generates a shear yield to consume the earthquake ...

Roller type medium-speed coal grinder

The invention relates to a roller type medium-speed coal grinder. The roller type medium-speed coal grinder comprises a driving motor, a coupling, a speed reducer, a rotary disc, a grinding disc, a grinding roller, a shell, a hot-air nozzle ring and multi-connecting-rod loading mechanisms, wherein the driving motor is arranged on a foundation; the coupling is rotatably connected with an output shaft of the driving motor; the speed reducer is rotatably connected with an output shaft of the coupling; the rotating disc is fastened and connected with the output end of the speed reducer; the grinding disc is fastened and connected with the upper end of the rotating disc; the grinding roller is arranged on the grinding disc; the rotating disc and the grinding disc are sheathed in the shell; the hot-air nozzle ring is arranged on the outer side along the circumferential direction of the grinding disc; the multi-connecting-rod loading mechanisms are arranged in the middle of the shell. Each multi-connecting-rod ...

Adjustable thick-thin separator

The separator comprises a bent pipe body, a flow guiding assembly, a separating assembly and a concentrating assembly, the flow guiding assembly comprises a first flow guiding plate and a second flow guiding plate, a collecting channel is defined by the flow guiding assembly, and the cross sectional area of the collecting channel is gradually reduced in the direction from the upstream to the downstream; the separation assembly comprises a rotating shaft and a partition plate, the partition plate defines a concentrated-phase branch channel, the concentrated-phase branch channel is communicated with the collection channel, the concentration assembly is connected with the elbow body, the concentration assembly is provided with a concentration channel, an air chamber and a vent hole, the concentration channel is communicated with the concentrated-phase branch channel, a plurality of filter holes are formed in the circumferential wall of the concentration channel, and the air chamber is communicated ...

Shake and decrease removable combination column structure

The utility model discloses a shake and decrease removable combination column structure, include: a core square steel tube, a grade beam end plate and four can replace the steel box, the core square steel tube is located on the grade beam end plate, its lower extreme seals, its upper end is through a plurality of first rigid coupling structure rigid coupling RC posts and set up an opening that holds RC post lower extreme, the grade beam end plate sets firmly on the grade beam through second rigid coupling structure, four can replace the steel box respectively detachable set up in the wall of core square steel tube with around this core square steel tube, this kind of structure of shake back can only can be replaced steel box position in the periphery and bucking destruction appear, slight destruction only appears or the disappearance destroys and at core square steel tube position, realize the controllability at damage position under the prerequisite of guaranteeing vertical bearing capacity ...

Mixed type powder dense-thin separator

The separator comprises a conveying pipeline, a first exhaust section, a second exhaust section, a pressurizing assembly and a blocking piece, the second end of the conveying pipeline is provided with a first outlet and a second outlet, the first end of the first exhaust section is communicated with the first outlet, and the second end of the second exhaust section is communicated with the second outlet. The first end of the second exhaust section communicates with the second end of the first exhaust section, the second end of the first exhaust section is located in the second end of the second exhaust section, a gap is formed between the outer circumferential wall of the first exhaust section and the inner circumferential wall of the second exhaust section, the pressurizing assembly comprises a pressurizing part and a first cavity, and the first cavity and the second exhaust section are both connected with the pressurizing part; the overlapped parts of the first exhaust section and the ...

Feed forming ring die

The utility model discloses a feed forming ring die which comprises a ring-shaped body provided with a die hole, the die hole obliquely extends in the rotating direction of the body, the die hole is communicated with the inner surface and the outer surface of the body, the die hole forms an output channel after feed forming, the feed forming ring die further comprises an inner lantern ring made of hard alloy, and the inner lantern ring is made of hard alloy. The inner lantern ring is sleeved with the body, a forming hole is formed in the inner lantern ring, the forming hole is communicated with the inner surface and the outer surface of the inner lantern ring, the forming hole is communicated with the die hole, and the forming hole is used for feed forming. According to the feed forming ring die, the service life of the ring die body can be prolonged.

Earthquake damage replaceable combination column structure

The invention discloses an earthquake damage replaceable combination column structure which comprises a core square steel pipe, a ground beam end plate and four replaceable steel boxes. The core square steel pipe is arranged on the ground beam end plate, the lower end of the core square steel pipe is closed, the upper end of the core square steel pipe is fixedly connected with an RC column through a plurality of first fixedly connecting structures and provided with an opening containing the lower end of the RC column, the ground beam end plate is fixedly arranged on a ground beam through second fixedly connecting structures, and the four replaceable steel boxes are detachably arranged on walls of the core square steel pipe respectively to surround the core square steel pipe. After an earthquake, only the peripheral replaceable steel boxes can be subjected to buckling failure, the core square steel pipe is only slightly destructed or not destructed, controllability of a destruction position ...

TOPCon battery and manufacturing method thereof

The invention discloses a TOPCon battery and a manufacturing method thereof. The method comprises the following steps of: obtaining a semi-finished product of the TOPCon battery, the semi-finished product comprising a silicon wafer, a tunneling oxide layer located on the back surface of the silicon wafer, a doped polycrystalline silicon layer, a back surface passivation layer, an emitter layer located on the front surface of the silicon wafer and a front surface passivation layer; grooving the front of the semi-finished product at positions corresponding to front fine grid lines to form slotted holes; preparing back main grid lines and back fine grid lines on the back of the semi-finished product; preparing aluminum fine grid lines in the slotted holes in an electroplating mode; and preparing front main grid lines on the front of the semi-finished product, and sintering the semi-finished product to obtain the TOPCon battery. According to the method, the aluminum fine grid lines are formed ...

But prosthetic combination column base of normal position

The utility model provides an anti -seismic performance better and shake after can quick prosthetic but prosthetic combination column base of normal position, connect including steel sheet bucket, one end the attenuator of steel sheet bucket lateral surface and with the connecting plate of the other end connection of attenuator, connecting plate fixed mounting with on the corresponding grade beam of reinforced concrete column, the attenuator has detachable mild steel board, the mild steel board is vertical to be placed. Through setting up attenuator (mild steel board), it is better relatively owing to plasticity as the mild steel board of attenuator power consumption board when taking place the small earthquake, can produce to concentrate and warp, absorb most seismic energy, when the strong earthquake of emergence, the mild steel board produces cuts the surrender, consumes seismic energy, protects reinforced concrete column not take place destruction or collapse well, and anti -seismic ...

体外反搏驱动装置

The present invention relates to one kind of external back beating apparatus comprising solenoid valve, cylinder and pushing board. The solenoid valve controls air with relatively high pressure to drive the piston inside the cylinder for bi-directional motion, and the pushing board acted with the piston applies pressure to limbs and trunk to promote blood circulation. The cylinder is driven with the fluid from the solenoid valve in two directions to produce excellent blood circulation promoting effect. The cylinder is driven with air source of high pressure, and this results in low air consumption, small volume of the air source, valve and pipeline, and small size of the back beating apparatus. The present invention may be used in back beating treatment, salvage in sick bed, health care and rehabilitation.

Puffing compound feed capable of keeping normality of body color of pelteobagrus fulvidraco and preparation method of puffing compound feed

The invention provides a puffing compound feed capable of keeping the normality of the body color of pelteobagrus fulvidraco and a preparation method of the puffing compound feed. The puffing compound feed is composed of the following raw materials in parts by weight: 28-32 parts of steam fish powder, 30-35 parts of peeled bean meal, 4-6 parts of corn protein powder, 5-6 parts of corn, 18-20 parts of flour, 4-5 parts of soya-bean oil, 1.2-1.5 parts of monocalcium phosphate and 1-1.5 parts of an annexing agent. The puffing compound feed is a qualified finished product material prepared through eleven steps of impurity removing, coarse grinding, primary mixing, superfine grinding, secondary mixing, tempering, puffing, stoving, primary sieving, oil spraying, cooling and finished product sieving. According to the invention, raw material selection, nutritional requirement and the like are adopted to design the puffing compound feed with comprehensive nutrition and a reasonable structure by adopting ...

Harm controllable shake and decrease steel column that to repair

The utility model discloses a harm controllable shake and decrease steel column that to repair, including steel column, attenuator and first connecting plate, the steel column passes through the end plate and is connected with the cushion cap, first connecting plate is fixed on the cushion cap, is connected through the attenuator between steel column and the first connecting plate, the attenuator includes a plurality of detachable mild steel boards, the mild steel board is vertical to be placed. The utility model discloses a set up the attenuator, when the small earthquake takes place when, steel column and attenuator combined action, steel column and attenuator are all at elastic state, when strong earthquake takes place when, it is better relatively owing to plasticity as the mild steel board of attenuator power consumption board, can produce and cut the surrender, absorb most seismic energy, protect the steel column not take place destruction well, anti -seismic performance is better ...

Method for distributing I/O cards for DCS (Data Communication System)

The invention discloses a method for distributing I/O cards for DCS (Data Communication System). The method is characterized in that the EXCEL VBA technology is utilized. The method comprises the following steps: a, inputting a measurement point list into a computer system, wherein the measurement point list includes number of each measurement point, name of each device, name of each measurement point, type of signal and group number; b, inputting the type of the I/O cards and the number of point, and calculating the quantity of the I/O cards of different types; c, inputting capacity parameters of I/O cards in a cabinet, and generating a layout and a list of the I/O cards in the cabinet; d, creating a list of I/O card channels without the distributed measurement points according to the measurement point list; e, grouping the measurement points according to the keywords; f, distributing the grouped measurement points to the channels of different cards, and creating an I/O card channel distribution ...

Air-cooled pulverized coal low-nitrogen combustor and application method thereof

The invention relates to an air-cooled pulverized coal low-nitrogen combustor applicable to small and medium-sized industrial pulverized coal boilers and an application method of the air-cooled pulverized coal low-nitrogen combustor. The air-cooled pulverized coal low-nitrogen combustor comprises a cylinder, an ignition bin, a precombustion chamber, a primary air pulverized coal pipe, a backflow cap, a secondary air pipe and a mixture tertiary air pipe, wherein one end of the cylinder is sealed, the other end of the cylinder is open, the ignition bin is arranged on the outer side of the cylinder, the precombustion chamber is arranged in the cylinder, the primary air pulverized coal pipe penetrates through the center of the ignition bin and the center of the cylinder to enter into the precombustion chamber, the backflow cap is arranged at the tail end of the outlet end of the primary pulverized coal pipe, the secondary air pipe is arranged at the bottom of the cylinder, and the mixture tertiary ...

Low-protein fish meal-free grass carp puffed mixed feed

The invention discloses low-protein fish meal-free grass carp puffed mixed feed which comprises the following raw materials: bean pulp, fermented bean pulp, wheat, rapeseed meal, cottonseed meal, wheat middling, rice bran, soybean oil, fish soluble, monocalcium phosphate, bentonite, zeolite powder, choline chloride, salt, composite vitamins, composite mineral salts, active essentiale, composite microecologics and a composite immunopotentiator. As fish meal is replaced by high-quality animal and plant protein sources, the problem of essential amino acid composition balance is effectively solved; due to addition of the active essentiale such as bile acid, L-carnitine, taurine, plant flavonoids and marine organism active substances, digestion, absorption and catabolism of grass carps to fat can be promoted, and liver and gall diseases can be prevented. As no fish meal is used in the feed, the protein resource is saved, and the cultivation cost can be lowered; and because of low protein, the ...

一种机群管理系统及其信息处理方法

The computer group management system includes one client end and one or more server end with internal address for message interaction, and the client end is further divided into graphic user interface layer for interaction with user and command receiving layer for receiving and transmitting data information. The graphic user interface layer is embedded into one web page, and the command receiving layer one server process and has one external address to express its position in Internet. The graphic user interface layer and the command receiving layer are connected via Internet or LAN. The present invention also discloses the information processing method of the said computer group management system. The present invention may access and manage computer group system via LAN and via Internet web browser, and has reduced system manager's job and raised management efficiency to computer group system.

Method and device for multimedia processing and corresponding multimedia player

The invention relates to a method and device for multimedia processing and a corresponding multimedia player. The method for multimedia processing comprises the steps of generating multimedia cache files; obtaining playing information of the multimedia cache files; obtaining first conversion conditions, and if the playing information of the multimedia cache files meets the first conversion conditions, adding the multimedia cache files to a local list of the multimedia player. According to the method and device for multimedia processing and the corresponding multimedia player, the multimedia cache files are added to the local list of the multimedia player according to the playing information of the multimedia cache files and the corresponding conversion conditions, and playing operation by users is simplified.

Loach feed and preparation method thereof

The invention provides a loach feed and a preparation method thereof. The loach feed is prepared from the following components in parts by weight: 18-22 parts of steamed fish meal, 15-18 parts of dehulled soybean meal, 9-12 parts of peanut cakes, 17-20 parts of rapeseed dregs, 4-6 parts of corn protein powder, 22-24 parts of flour, 3-4 parts of phosphatide oil, 1.2-1.5 parts of monocalcium phosphate and 1-1.5 parts of an additive. The loach feed is a qualified finished material obtained by carrying out primary mixing, coarse grinding, secondary mixing, superfine grinding, tempering and granulating, post curing, cooling and sieving by virtue of a finished product sieve. The loach feed has the advantages that reasonable blending is carried out from the aspects of raw material selection, nutrient requirement and processing technology and the like according to life habits and nutritional requirements of loach, the loach feed which is comprehensive in nutrition and reasonable in structure is ...

METHOD AND APPARATUS FOR PLAYLIST SYNCHRONIZATION

The present application is applicable to the field of network technologies, and provides method and apparatus for playlist synchronization, where the method includes: detecting a user operation on a playlist of multimedia documents at a first terminal; generating an operation code according to the user operation on the playlist, the operation code including an identifier of the playlist; extracting identification information, the identification information including a user identifier and a globally unique identifier (GUID) of the first terminal; and sending the operation code and the identification information to the server, wherein the server is configured to identify a second terminal according to the operation code and the identification information and send the operation code to the second terminal such that the second terminal can perform a synchronization operation to a playlist of multimedia documents at the second terminal according to the operation code. 1. A method for synchronizing a playlist between multiple terminals through a server , wherein the multiple terminals are communicatively coupled to the server via a communication network , the method comprising:detecting a user operation on a playlist of multimedia documents at a first terminal;generating an operation code according to the user operation on the playlist, the operation code including an identifier of the playlist;extracting identification information, the identification information including a user identifier and a globally unique identifier (GUID) of the first terminal; andsending the operation code and the identification information to the server, wherein the server is configured to identify a second terminal according to the operation code and the identification information and send the operation code to the second terminal such that the second terminal can perform a synchronization operation to a playlist of multimedia documents at the second terminal according to the operation code.2. ...

Method And Apparatus For Managing Multimedia Resource And Multimedia Player

A method and an apparatus for managing multimedia resources and a multimedia player is described. The method includes obtaining, by a multimedia application, multimedia resource information. The multimedia resource information includes information of a multimedia resource that has not been downloaded to a local end. The method further includes detecting, by the multimedia application, whether a network environment on the local end includes a downloadable link and downloading automatically, if a detection result is yes, the corresponding multimedia resource through the downloadable link according to the information of the multimedia resource that has not been downloaded to the local end. 1. A method for managing multimedia resources , comprising:obtaining, by a multimedia application, multimedia resource information, the multimedia resource information comprising information of a multimedia resource that has not been downloaded to a local end; anddetecting, by the multimedia application, whether a network environment on the local end comprises a downloadable link, and downloading automatically, if a detection result is yes, the corresponding multimedia resource through the downloadable link according to the information of the multimedia resource that has not been downloaded to the local end.2. The method according to claim 1 , wherein the obtaining claim 1 , by a multimedia application claim 1 , multimedia resource information comprises:obtaining, by the multimedia application, changed multimedia resource information, detecting whether the changed multimedia resource information comprises the information of the multimedia resource that has not been downloaded to the local end; and starting, if a detection result is yes, the step of the detecting, by the multimedia application, whether a network environment on the local end comprises a downloadable link.3. The method according to claim 1 , wherein the obtaining claim 1 , by a multimedia application claim 1 , ...

Driving device for external counterpulsation

The present invention relates to a driving device for external counterpulsation, which includes solenoid valves (1), air cylinders (2) and pusher plates (3). The solenoid valves (1) control higher voltage driving the two way motion of pistons (21) in the fir cylinders (2), the pistons (21) act on the pusher plates (3), and the pusher plates (3) bear down on the extremities (5), so it can drive the blood circulation. The air cylinders (2) are driven in two way by liquid brought from the solenoid valves (1), they act quickly, so it can bring good effect of driving the blood circulation. Since the air cylinders (2) are driven by an air source with higher pressure, the air expended is less. The fact that the size of the device of air source for counterpulsation, the valve, the pipeline and so on reducing accordingly, makes the size of the device for counterpulsation reduced. So the device is portable, and it can be used in both the treat of counterpulsation, rescue by the bedside, and improving one’s health, health care, healing, or in the family.

Back metal electrode of n-type topcon solar cell and preparation method therefor, and cell

Back-Side Metal Electrode of N-Type TOPCon Solar Cell, and Method for Preparing Back-Side Metal Electrode of N-Type TOPCon Solar Cell, and N-type TOPCon Solar Cell

Some embodiments of the present invention relate to a technical field of N-type TOPCon solar cells, and disclosed a back-side metal electrode of an N-type TOPCon solar cell. The back-side metal electrode includes a substrate, a plurality of first silver fine grids disposed on a passivation film which is on a back side of the substrate, a plurality of second aluminum fine grids overlaid on the plurality of first silver fine grids, and a plurality of first silver main grids disposed perpendicular to the plurality of first silver fine grids. Each of the plurality of first silver main grids is a segmented structure. The back-side metal electrode further includes a plurality of second aluminum main grids, which are formed, in a printing manner, between any two adjacent grid segments of a plurality of grid segments and around each of the plurality of grid segments.

Back-Side Metal Electrode of N-Type TOPCon Solar Cell, and Method for Preparing Back-Side Metal Electrode of N-Type TOPCon Solar Cell, and N-type TOPCon Solar Cell

The present invention relates to the technical field of N-type TopCon solar cells. In order to solve the problem of high costs caused by using a silver paste to perform electrode printing on the back of an N-type TopCon cell, disclosed is a back metal electrode of an N-type TopCon solar cell. The back metal electrode comprises a substrate (1), several first silver fine grids (12-4) arranged on a passivation film on the back of the substrate, second aluminum fine grids (12-6) overlaying the first silver fine grids (12-4), and a first silver main grid (12-5) arranged perpendicular to the first silver fine grids (12-4), wherein the first silver main grid (12-5) is of a segmented structure; and the back metal electrode further comprises a second aluminum main grid (12-7) which is formed, in a printing manner, between sections of the first silver main grid (12-5) and around the sections thereof. The second aluminum fine grids (12-6) are obtained by overprinting an aluminum paste on the first silver fine grids (12-4), such that the consumption amount of a silver paste can be reduced, and the cost is thus reduced; in addition, transmission channels of carriers are increased, a series resistance is reduced, and the cell efficiency is improved. A main grid is prepared in a silver-aluminum butt joint manner, such that the soldering requirements for the back of a cell are met, and the consumption amount of a main grid silver paste is also reduced, thereby reducing the cost.

Back metal electrode of n-type topcon solar cell and preparation method therefor, and cell

Some embodiments of the present invention relate to a technical field of N-type TOPCon solar cells. In order to solve the problem of high costs caused by the use of silver paste to perform electrode printing on the back side of an N-type TOPCon cell, disclosed is a back-side metal electrode of an N-type TOPCon solar cell. The back-side metal electrode includes a substrate (1), a plurality of first silver fine grids (12-4) disposed on a passivation film which is on a back side of the substrate, a plurality of second aluminum fine grids (12-6) overlaid on the plurality of first silver fine grids (12-4), and a plurality of first silver main grids (12-5) disposed perpendicular to the plurality of first silver fine grids (12-4). Each of the plurality of first silver main grids (12-5) is a segmented structure. The back-side metal electrode further includes a plurality of second aluminum main grids (12-7), which are formed, in a printing manner, between sections of each of the plurality of the first silver main grids (12-5) and around the sections. The second aluminum fine grids (12-6) are obtained by overprinting aluminum paste on the first silver fine grids (12-4), such that the consumption of silver paste can be reduced, and the cost is thus reduced; in addition, transmission channels of carriers are increased, a series resistance is reduced, and cell efficiency is improved. A main grid is prepared in a silver-aluminum butt joint manner, such that the soldering requirements for the back side of a cell are met, and the consumption of main grid silver paste is also reduced, thereby reducing the cost.

Potassium dihydrogen phosphate (kdp) frequency-doubling crystal structure

The present disclosure provides a potassium dihydrogen phosphate (KDP) frequency-doubling crystal structure, including a crystal fixing structure, a KDP crystal, a π polarization tube, and a σ polarization tube; where a π-polarized laser with a central wavelength of 800 nm enters the KDP crystal through the π polarization tube, and the KDP crystal converts the π-polarized laser with a central wavelength of 800 nm into a σ-polarized laser with a central wavelength of 400 nm by frequency doubling and then outputs the σ-polarized laser from the σ polarization tube. Close end bevels of the π polarization tube and the σ polarization tube are designed into a Brewster angle. The KDP crystal is placed in a vacuum-sealed cavity formed by the π polarization tube, the σ polarization tube, and the crystal fixing structure, which eliminates a complicated process of crystal coating and prevents the KDP crystal from deliquescing in air.

Back-Side Metal Electrode of N-Type TOPCon Solar Cell, and Method for Preparing Back-Side Metal Electrode of N-Type TOPCon Solar Cell, and N-type TOPCon Solar Cell

The present invention relates to the technical field of N-type TopCon solar cells. In order to solve the problem of high costs caused by using a silver paste to perform electrode printing on the back of an N-type TopCon cell, disclosed is a back metal electrode of an N-type TopCon solar cell. The back metal electrode comprises a substrate (1), several first silver fine grids (12-4) arranged on a passivation film on the back of the substrate, second aluminum fine grids (12-6) overlaying the first silver fine grids (12-4), and a first silver main grid (12-5) arranged perpendicular to the first silver fine grids (12-4), wherein the first silver main grid (12-5) is of a segmented structure; and the back metal electrode further comprises a second aluminum main grid (12-7) which is formed, in a printing manner, between sections of the first silver main grid (12-5) and around the sections thereof. The second aluminum fine grids (12-6) are obtained by overprinting an aluminum paste on the first silver fine grids (12-4), such that the consumption amount of a silver paste can be reduced, and the cost is thus reduced; in addition, transmission channels of carriers are increased, a series resistance is reduced, and the cell efficiency is improved. A main grid is prepared in a silver-aluminum butt joint manner, such that the soldering requirements for the back of a cell are met, and the consumption amount of a main grid silver paste is also reduced, thereby reducing the cost.