手机保护壳（AIR4）

PISTON TYPE INDUSTRIAL CONVEYING PUMP

A piston type industrial pump comprises a power device (1), a pumping device (2) and a stirring device (3). A connecting pipeline is arranged between the power device (1) and the pumping device (2); the pumping device (2) is fixedly connected with the stirring device (3); the power device (1) consists of at least two power units connected in parallel; the power units comprises hydraulic oil tanks (101), motor oil pump sets (102), and a power unit base (103); and a communicating oil pipe (104) is arranged between the hydraulic oil tanks (101) of the power units. There are at least two groups of motor oil pump sets (102) provided in each power unit. Two or more power units are connected in parallel for providing superimposed power, so that the flow of a hydraulic system can meet a large-volume conveying requirement; in the meantime, all the power units are independent of each other and can work together in parallel or work independently; when one of the power units is fails, only the faulty ...

Nitrogen-phosphorus high-synergism bifunctional flame retardant, efficient flame-retardant beta-crystal polypropylene material as well as preparation method and application of efficient flame-retardant beta-crystal polypropylene material

The invention discloses a nitrogen-phosphorus high-synergism bifunctional flame retardant, an efficient flame-retardant beta-crystal polypropylene material and a preparation method and application of the efficient flame-retardant beta-crystal polypropylene material, the flame retardant is composed of polyphosphates, a modified polymer and chitosan, and the modified polymer is a polyphosphate modified phytic acid-melamine supramolecular polymer. The preparation method of the flame retardant comprises the following steps: preparing a phytic acid-melamine supramolecular polymer by utilizing an ion complexing effect, and adding polyphosphate for modification to obtain a modified polymer; a chitosan-coated modified polymer core-shell material is obtained by utilizing a self-assembly effect under electrostatic driving between chitosan and a modified polymer; and immobilizing multi-phosphate into the core-shell material of the chitosan coated modified polymer to obtain the nitrogen-phosphorus ...

Flameless combustion device for mixed combustion of coal and ammonia

The invention discloses a flameless combustion device for mixed combustion of coal and ammonia. The flameless combustion device comprises a pulverized coal pre-combustion unit, an ammonia decomposition unit and a mixed combustion unit of coal and ammonia. Ammonia gas in the ammonia gas pre-decomposition chamber exchanges heat with high-temperature flue gas in the high-temperature flue gas air pipe and becomes ammonia gas pre-decomposition gas (NH3, N2 and H2) under the action of an ammonia decomposition catalyst, and the ammonia gas pre-decomposition gas (NH3, N2 and H2) enters the combustion chamber. In the coal-ammonia mixed combustion unit, ammonia gas pre-decomposed gas is firstly mixed with secondary air when entering a combustion chamber; incomplete combustion high-temperature flue gas enters a combustion chamber and is preliminarily mixed with ammonia gas pre-decomposed gas under the action of a bluff body; cO, H2 and residual coke in the incomplete combustion flue gas and H2 in ...

Magnetic assembly and vehicle-mounted support

The invention provides a magnetic assembly and a vehicle-mounted support. In the magnetic assembly, a first main part comprises a first fixing part and a magnetic part, the side, close to a second main part, of the magnetic part is provided with two opposite magnetic poles, the magnetic part is arranged on the first fixing part, the second main part comprises a second fixing part and a magnetic isolation part, and the magnetic isolation part is arranged on the second fixing part; when the first main part moves relative to the second main part, the magnetic isolation part and the magnetic part are aligned or the magnetic isolation part and the magnetic part are staggered, compared with the prior art, for example, the magnetic assembly is applied to a vehicle-mounted support, the side, away from the first main part, of the second main part is used for being connected with a mobile phone in a magnetic attraction mode, and the magnetic isolation part and the magnetic part are staggered at the ...

Tee joint reversing valve

... 本实用新型公开了一种三通换向阀，包括第一进料段、第二进料段及出料段；还设置有能够在第一进料段和第二进料段内移动的球状阀芯，第一进料段远离出料段的一端设置有第一过渡管，第二进料段远离出料段的一端设置有第二过渡管，且第一过渡管和第二过渡管的内径均小于球状阀芯的直径。本实用新型公开的三通换向阀，其出料段与第一进料段及第二进料段连通，且进料段内设置的球状阀芯能够在进料段内移动，移动时，由于过渡管的内径比球状阀芯的直径小，因此能够阻止球状阀芯滑出阀体。此外，该三通换向阀仅需在管道内的推力作用下便能够改变球状阀芯的位置，使其由一个进料段移至另一个进料段，从而达到改变进料口的目的。 ...

Magnetic connecting piece, protective shell and vehicle-mounted support

According to the magnetic connecting piece, the protective shell and the vehicle-mounted support, the magnetic connecting piece is composed of the movable piece and the fixed piece which are arranged side by side, the magnetic connecting piece can be connected to a mobile phone accessory through the connecting part of the fixed piece, and the first magnetic piece of the fixed piece and the second magnetic piece of the movable piece are magnetically attracted to a mobile phone. Because the movable part can move relative to the fixed part, when the mobile phone is detached from the mobile phone accessory, the magnetic attraction force between the mobile phone and the second magnetic part drives the movable part to move relative to the fixed part, so that the mobile phone accessory can be detached from the mobile phone only by overcoming the magnetic attraction force of the second magnetic part. Or the movable piece moves relative to the fixed piece to change the magnetic attraction force ...

Core-shell structure low-temperature phase change energy storage material and preparation method thereof

The invention discloses a core-shell structure low-temperature phase change energy storage material and a preparation method thereof.The phase change energy storage material is a sandwich structure material, an inner core is a graphene quantum dot/gallium-indium-silver alloy compound, a middle layer is a nitrogen-rich carbon material and is obtained by high-temperature carbonization of polyaniline in an inert atmosphere, and an outer layer is zirconium-titanium composite oxide; the average thickness is 10 to 30 nm; and putting the graphene quantum dot/gallium indium silver compound, polyaniline and zirconium titanium composite oxide into a tubular furnace, introducing argon, heating to 800-1200 DEG C, and reacting for 1-6 hours to obtain the low-temperature phase change energy storage material with the core-shell structure. The low-temperature phase change energy storage material with the core-shell structure has relatively high phase change latent heat, good heat conductivity and excellent ...

Data transmission method and device, computer equipment and storage medium

The invention provides a data transmission method and device, computer equipment and a storage medium, and the method comprises the steps: determining a first time version in an obtaining request after the obtaining request for page data sent by a client is received; the first time version is used for indicating the updating time of page data in the client; determining a second time version of the page data; the second time version is used for indicating the updating time of page data in the server; determining time difference information of the second time version and the first time version; and determining update data in the page data based on the time difference information, and returning the time difference information and the update data to the client. According to the method and the device, incremental updating of the page data can be realized, so that data which is not updated in the page data does not need to be transmitted, and bandwidth occupation is reduced.

Anti-drop protective shell

The invention provides a drop-resistant protective shell which comprises a side frame, a back plate and an air bag assembly, the side frame surrounds the periphery of the back plate to form a containing cavity, a mounting position is arranged on the side frame, the air bag assembly is arranged at the mounting position and comprises a sealed air bag cavity and an air bag groove, and the air bag groove is formed in the side, close to the containing cavity, of the air bag assembly in a concave mode. When the electronic equipment sleeved with the anti-falling protection shell falls off, the side frame makes contact with the ground firstly under the general condition, the sealed air bag cavity carries out first-time buffering protection on the electronic equipment at the moment, meanwhile, due to the fact that the notch of the air bag groove is communicated with the containing cavity, after the electronic equipment is sleeved with the protection shell, the electronic equipment can be prevented ...

Airbag protection shell and manufacturing method thereof

The invention provides an air bag protection shell and a manufacturing method of the air bag protection shell, the air bag protection shell comprises a side frame, a back plate and an air bag assembly, the side frame surrounds the periphery of the back plate, the air bag assembly comprises a buffer part and a connecting part which are connected with each other, the buffer part comprises a closed air bag cavity, and a positioning hole is formed in the connecting part; according to the air bag protection shell, the air bag assembly is fixed to the side frame through the connecting part, and compared with the prior art that a clamp is adopted for clamping and fixing an air bag, the air bag is prone to deformation, and an unqualified protection shell product is produced, positioning holes are formed in the connecting part of the air bag assembly; according to the air bag production mold, the protruding part protruding out of the mold core is inserted into the positioning hole, so that the air ...

High-temperature-stable reduction-resistant cerium oxide-nickel ferrite composite catalyst as well as preparation method and application thereof

The invention discloses a high-temperature stable reduction-resistant cerium oxide-nickel ferrite composite catalyst as well as a preparation method and application thereof, the preparation method comprises the following steps: cerium salt and nickel ferrite are mixed and dispersed in ethanol and ignited, and a product after combustion is calcined to obtain the cerium oxide-nickel ferrite composite catalyst; the cerium oxide-nickel ferrite composite catalyst is of a core-shell structure, namely nickel ferrite is wrapped by cerium oxide, and the mass ratio of the shell cerium oxide to the core nickel ferrite is (1: 100)-(1: 2.5). The cerium oxide-nickel ferrite composite catalyst prepared by the method has high carbon dioxide catalytic efficiency and thermal stability in a high-temperature reducing atmosphere, so that the carbon dioxide is efficiently converted into a high-added-value product, and the emission reduction and economic utilization of the carbon dioxide are effectively promoted ...

Adsorbent for extracting lithium from whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake and preparation method of adsorbent for extracting lithium from whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake

The invention discloses an adsorbent for extracting lithium from a whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake and a preparation method of the adsorbent, and belongs to the technical field of materials, the Li < + > saturation adsorption capacity of the adsorbent for extracting lithium from the whisker-shaped spinel type magnesium-aluminum oxide lithium ion sieve salt lake is greater than 50mg/g, and the saturation adsorption capacity is greater than 45mg/g after the adsorbent is recycled for 30 times; the diameter of the adsorbent is 0.5-1 [mu] m, and the adsorbent is in a whisker shape. The adsorbent provided by the invention is more compact in structure, and can effectively avoid the change of the structure of magnesium aluminate spinel caused by the fact that lithium ions thermally migrate into lattice gaps of the magnesium aluminate spinel, thereby further improving the cycling stability of a spinel type magnesium aluminum oxide lithium ion sieve ...

Internet of Things cloud platform data automatic processing system

The invention discloses an automatic data processing system for an Internet of Things cloud platform. The automatic data processing system comprises a cloud server and an Internet of Things platform, the cloud server and the Internet of Things platform are in communication connection through a network; the cloud server comprises a data acquisition module, a data processing module and a business processing module; the data acquisition module performs Internet of Things data acquisition through data acquisition equipment, and the data processing module performs shunting processing, storage and generation of service logic; the business logic is subjected to data analysis through the business processing module to obtain a data result; and the data result is transmitted to the Internet of Things platform. The method has the advantages that the technical problems that in the prior art, when data are analyzed, cost is high, and safety is low are solved, and the stability of cloud computing service ...

Magnetic connecting piece and electronic equipment support

According to the magnetic connecting piece and the electronic equipment support, the magnetic connecting piece is used for being fixedly connected with a mobile phone accessory, the first magnetic connecting piece and the second magnetic connecting piece are magnetically attracted to a mobile phone so that the mobile phone can be magnetically attracted and fixed to the mobile phone accessory, and due to the fact that the magnetic isolation piece is arranged between the first magnetic connecting piece and the second magnetic connecting piece, the magnetic isolation piece can be separated from the mobile phone accessory. When the mobile phone accessory is detached, the magnetic force of mutual magnetic attraction between the first magnetic connecting piece and the second magnetic connecting piece is weakened, and the first magnetic connecting piece can smoothly move relative to the second magnetic connecting piece; the magnetic attraction force between the mobile phone and the second magnetic ...

Digital universal instrument

The invention belongs to the technical field of universal meters, and particularly relates to a digital universal meter, which comprises a meter body, and a knob and a display are arranged on the surface of the meter body; the insertion hole is formed in the surface of the instrument body; the contact point is arranged in the jack, and the contact point is arranged in a rod shape; the plug is arranged above the instrument body; when a circuit needs to be detected on the detection mainboard, the pen point of the detection pen abuts against the position, needing to be detected, of the mainboard, then the suction cup is moved, the suction cup is sucked to the mainboard, the effect of fixing the detection pen is achieved, the detection pen does not need to be held by a hand, and the detection pen is convenient to use. Therefore, one hand of a user is liberated, the user can conveniently adjust the knob for debugging, the detection efficiency is improved, and the time is saved.

Magnetic assembly, protective shell with magnetic assembly, support and wireless charger

The invention provides a magnetic assembly and a protective shell, a support and a wireless charger with the magnetic assembly, the magnetic assembly is composed of a first magnetic piece and a second magnetic piece which are arranged side by side to form a structure matched with a magnet in a mobile phone, and meanwhile, the second magnetic piece is movable, and the first magnetic piece is fixed, so that the mobile phone is not damaged. When the mobile phone is far away from the accessory, the second magnetic piece can be driven to move relative to the first magnetic piece through the magnetic attraction force between the mobile phone and the second magnetic piece; the mobile phone can be separated from the accessory only by overcoming the attraction force of the first magnetic part or changing the magnetic attraction force of the magnetic assembly when the second magnetic part moves relative to the first magnetic part, so that the mobile phone can be separated from the accessory more ...