Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год

Применить Всего найдено 31. Отображено 31.
14-04-2023 дата публикации

Method for rapidly adjusting and maintaining plate-type ballastless track filling layer of operation high-speed rail

Номер: CN115961509A
Принадлежит:

The invention discloses a method for rapidly adjusting and maintaining a filling layer of a plate-type ballastless track of an operating high-speed rail, and belongs to the technical field of rail transit. According to the track data, the space position adjustment amount of the track plate is obtained; releasing the limiting device of the track plate; the track plate is lifted, so that the track plate is separated from the filling layer on the base; a part of each of the two sides of the filling layer on the base is chiseled away; an adhesion agent is sprayed on the remaining unchiseled filling layer on the base; a mesh is inserted between the base and the track plate, and the mesh covers the filling layer which is not chiseled away; adjusting the height of the track plate according to the space position adjustment amount of the track plate; and the two sides of the track plate are sealed, and a grouting material is poured between the base and the track plate. The whole existing filling ...

Подробнее
08-07-2015 дата публикации

Environment-friendly type developing solution and preparation method and application thereof

Номер: CN104765244A
Автор: WANG ZIJIE, ZHENG XINGUO
Принадлежит:

The invention discloses an environment-friendly type developing solution and a preparation method and application thereof and relates to a material for pattern surface printing plate-making, in particular to a developing solution for the pattern surface printing plate-making. The environment-friendly type developing solution and the preparation method and the application thereof aim at achieving safety, non-pollution and strong antioxidant ability. The environment-friendly type developing solution comprises an environment-friendly type antioxidant; the environment-friendly type antioxidant is one or more kinds of the L-ascorbic acid, D-erythorbic acid and sodium ascorbate. The preparation method of the environment-friendly type developing solution comprises the steps of evenly mixing all raw materials and filtering by filter paper, and the environment-friendly type developing solution is obtained. The environment-friendly type developing solution uses the environment-friendly type antioxidant ...

Подробнее
08-07-2009 дата публикации

Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar

Номер: CN0101475747A
Принадлежит:

The invention relates to emulsified asphalt for longitudinal connecting plate type ballastless track cement emulsified asphalt mortar. The emulsified asphalt comprises the following components in percentage by weight: 60 to 65 percent of asphalt, 0.2 to 5 percent of anionic emulsifier, 0.02 to 3 percent of stabilizing agent, 0 to 4 percent of assistant, and the balance being water; and the wax content of the asphalt is less than or equal to 2.2 percent. The emulsified asphalt for the longitudinal connecting plate type ballastless track cement emulsified asphalt mortar has good emulsifying effect, is not only suitable for storage and usage under normal temperature environment, but also suitable for storage and usage under the environment of lower temperature or higher temperature, and has the advantages of good storage stability, strong temperature adaptability and the like; and the cement emulsified asphalt mortar prepared by the emulsified asphalt has the advantages of long working time ...

Подробнее
24-09-2014 дата публикации

Method for continuously casting 304-series stainless steel non-coped casting blank

Номер: CN104057041A
Принадлежит:

The invention discloses a method for continuously casting a 304-series stainless steel non-coped casting blank, and belongs to the field of metallurgy. The method is characterized in that (1) crystallizer parameters are that the amplitude is +/-(2-4) millimeters, the frequency is 175-195Hz, the negative sliding time is 0.115 second, the positive sliding time is 0.209 second, and the negative sliding time ratio is 70.9 percent; (2) immersion nozzle parameters are that the nozzle dip angle is 10 degrees, and faces upwards; the side hole size is (42 millimeters)*(35 millimeters), the insertion depth width specification is 110-120 millimeters, and the narrow specification is 120-130 millimeters; the pouring temperature of crystallizer covering slag is 1,495 DEG C, and the melting point is 1,125 DEG C; (3) a hydraulic non-sine vibration mode is adopted, the frequency is controlled at 175-195Hz, and the amplitude is 2-4 millimeters; (4) a solidification primary phase is a delta phase, and the ...

Подробнее
29-10-2014 дата публикации

Testing method of tensile adhesive strength of flexible polyurethane foam material for polyurethane solidification track bed

Номер: CN104122203A
Принадлежит:

The invention relates to a testing method of the tensile adhesive strength of a flexible polyurethane foam material for a polyurethane solidification track bed. The method mainly comprises the following steps: (1) erecting two cylinder railway ballast specimens oppositely and concentrically with an interval between the two specimens of 20mm, and sealing a cavity between the two specimens with kraft paper and an adhesive tape; (2) pouring the stirred double-component polyurethane slurry into the cavity, and dismounting the seal and cutting excessive foam bodies after the slurry reacts to expand in volume and is solidified, hardened and maintained for a period of time; (3) coating adhesives at two sides of the bonding specimens, and pasting positioning base plates to two sides of the specimens; (4) linking a tensile steel plate with pull rods to the positioning base plates by fastening bolts; (5) testing the bonding strength of the flexible polyurethane foam material and railway ballast stones ...

Подробнее
08-08-2023 дата публикации

Method for evaluating fine smashing scheme of operating ordinary-speed railway based on multi-factor constraint

Номер: CN116561913A
Принадлежит:

A multi-factor constraint-based evaluation method for a fine tamping scheme of an operating ordinary-speed railway comprises the following steps of: comprehensively comparing line flat and vertical section parameters before and after section reconstruction design of the fine tamping scheme, judging whether a flat and vertical section reconstruction design result meets a limit value requirement, and ensuring the reasonability of the flat and vertical section design parameters; according to the method, irregularity of a target line shape under different detection chord lengths is evaluated, the driving power performance of the target line shape is evaluated, the smoothness of the optimized target line shape is ensured, the track starting and lining amount, the change rate and the proportion of a fine tamping scheme are considered, the feasibility of the scheme is evaluated, and it is ensured that the adjustment amount of the fine tamping scheme conforms to tamping operation characteristics ...

Подробнее
05-11-2014 дата публикации

Deviation correcting method for ballastless track center line deviation caused by subsidence

Номер: CN104131499A
Принадлежит:

The invention provides a deviation correcting method for ballastless track center line deviation caused by subsidence, belongs to the technical field of the repair of a ballastless track of a high speed railway, and particularly relates to a line deviation correcting method. The deviation correcting method is characterized in that: after the deviation quantity of a subsidence line is determined, more than two rows of grouting holes are formed in one side in the positive deviation direction of the track; quick-setting rapid hardening grouting materials are injected in the space below a track bed under a certain grouting pressure through grouting pipes in the grouting holes by using high-pressure grouting equipment according to the determined equipment parameters, grouting rhythm and grouting order; grouting is firstly performed for the grouting holes in the outer side of the line, the grouting materials rapidly solidify to form curtains, and then grouting is performed for the grouting holes ...

Подробнее
28-04-2023 дата публикации

Method for repairing vertical reflection crack of ballastless track filling layer

Номер: CN116024853A
Принадлежит:

The invention discloses a method for repairing a vertical reflection crack of a ballastless track filling layer, which comprises the following steps of: under the condition of track plate coverage, removing a filling layer part which is corresponding to a joint cutting position and has generated a vertical reflection crack; cleaning equipment is connected with the hollow pipeline to clean the cavity and the kerfs; flexible filling materials are injected into the kerfs to form flexible filling of the kerfs; the edge of the cavity is sealed, and a pouring hole and an exhaust hole are reserved; a repairing material is poured into a cavity in the sealing edge until the exhaust hole overflows slurry so as to ensure full pouring; and after the repairing material reaches the preset strength, the sealing edge is removed, and repairing of the filling layer is completed. By means of the technical scheme, the good waterproof effect of the kerf is still achieved under the condition that the environment ...

Подробнее
23-11-2011 дата публикации

Dry material for vertical connected plate type unballasted track cement emulsified bitumen mortar

Номер: CN0101475350B
Принадлежит:

The invention relates to a dry material used for a cement emulsified bitumen mortar of vertical connecting plate type ballastless rails, which comprises the following components in portion by weight: 100 portions of gelled material, 138 to 195 portions of sand, 0.05 to 0.5 portion of fiber, 0.003 to 0.01 portion of aluminum powder, 0 to 0.1 portion of polymer, and 0 to 10 portions of stone dust. By adding fiber, particularly hydrophilic fiber to dry materials, the toughness, the shock resistance and the fatigue resistance of the mortar prepared from the dry materials can be improved, the bleeding phenomenon of the mortar can be avoided and the lasting quality of the mortar can be improved; simultaneously, by selecting different gelled materials, particularly the combinations of between the different gelled materials, the problem that the prior dry material and the mortar prepared from the dry materials are difficult to satisfy the requirements on various construction environments and use ...

Подробнее
04-04-2023 дата публикации

Design method and construction method for bituminous concrete waterproof closed structure of high-speed rail roadbed

Номер: CN115906248A
Принадлежит:

The invention discloses a design method and a construction method of an asphalt concrete waterproof closed structure of a high-speed rail roadbed, and compared with the prior art, the method comprises the following steps: obtaining a railway design index parameter set, a regional meteorological data set and an asphalt concrete load basic parameter set; initially determining combined parameters of the high-speed railway roadbed full-section asphalt concrete waterproof closed structure, and performing parameter checking calculation on the combined parameters based on a railway design index parameter set, a regional meteorological data set and an asphalt concrete load basic parameter set; the types of the parameter checking calculation comprise bottom layer bending and pulling damage checking calculation, material low-temperature cracking checking calculation and surface layer passive stretching checking calculation; judging whether the combined parameters are qualified or not according to ...

Подробнее
19-11-2014 дата публикации

Rapid repairing method for sunken ballastless track through grouting lifting

Номер: CN104153259A
Принадлежит:

The invention relates to a rapid repairing method for a sunken ballastless track through grouting lifting. According to the method, grouting materials, device tools and a construction technology are needed, and the method specifically comprises the steps that after lifting quantity of the ballastless track is determined, a high-pressure grouting device is adopted, and under certain grouting pressure, rapid-hardening grouting materials are grouted under a ballastless track base which is horizontally arranged in advance and in grouting bags in a graded broken stone surface layer through a grouting pipe in a certain sequence; in the grouting process, an electronic level precise measurement device is adopted to monitor elevation changes of the upper portion of the track in real time, when the elevation is close to or reaches the designed elevation, grouting lifting is stopped, then rapid-hardening grouting materials with high fluidity are directly grouted in the gap between the lifted base ...

Подробнее
10-06-2015 дата публикации

Polyurethane patching material used for settlement repairing of ballastless track structure for high-speed railway

Номер: CN104693413A
Принадлежит:

The invention relates to a polyurethane patching material used for settlement repairing of a ballastless structure for a high-speed railway. The polyurethane patching material is formed by hybrid reaction of an A component material and a B component material by a high-pressure impact. The volume ratio of the A component and the B component is 1:1-1:1.8. The A component is a mixture formed by polyhydric alcohol modified diphenylmethane diisocyanate and multi-methylene multi-phenyl isocyanate. The viscosity of the A component ranges from 100 mPa.s to 200 mPa.s at the 25 DEG C temperature. The B component is a mixture formed by polyhydric alcohol, a coupling agent, a hydrolytic stabilizing agent, a cross-linking agent, a foam stabilizing agent, a catalyst agent and a foaming agent. The viscosity of the B component ranges from 150 mPa.s to 300 mPa.s at the 25 DEG C temperature. The B component is characterized in that at least a part of end amido polyolefin polyhydric alcohol with 8 functionalities ...

Подробнее
23-05-2023 дата публикации

Longitudinal connecting plate type ballastless track filling layer repairing material and repairing method

Номер: CN116143488A
Принадлежит:

The invention discloses a repairing material for a filling layer of a longitudinally connected plate type ballastless track. The repairing material comprises 14-50 parts of an active component, 0.1-1 part of a penetrant, 0.1-2 parts of a reaction accelerator, 0.1-1 part of a water repellent agent, 0-1 part of a defoaming agent and 60-90 parts of a solvent, the invention further discloses a longitudinal connecting plate type ballastless track filling layer repairing method. According to the stress and deformation characteristics of the longitudinal connecting plate ballastless track structure, a specific grouting tool technology is adopted, and targeted repair of the filling layer part in a certain area below the rail bearing table with the maximum stress or the most serious abrasion is achieved. According to the method, the strength and compactness of the surface layer of the filling layer can be improved, the defects of an existing open joint filling and repairing method are overcome, ...

Подробнее
01-04-2015 дата публикации

Device for adding strong acid/alkali water treatment agent into circulating water system

Номер: CN104478022A
Принадлежит:

The invention discloses a device for adding a strong acid/alkali water treatment agent into a circulating water system and relates to a device for adding a water treatment agent into the circulating water system. The device aims at solving the technical problems of large local concentration of a chemical agent solution, long mixing time, large labor intensity of operators and high risk factor caused by the existing device for adding the strong acid/alkali water treatment agent into the circulating water system in the workshop of a plant. The device disclosed by the invention comprises a regulating valve, a water ejector, a check valve, a float flow meter and a chemical agent absorption hose, wherein the water inlet of the regulating valve is connected with power water, the water outlet of the water ejector is connected with the water inlet of the regulating valve, and the chemical agent inlet of the water ejector is connected with the water outlet of the check valve. The device has the ...

Подробнее
23-05-2023 дата публикации

Stepped hydration super-early-strength material for steam-cured concrete product

Номер: CN116143438A
Принадлежит:

The invention belongs to the technical field of application of steam-cured concrete products, and relates to a cascade hydration super-early-strength material for a steam-cured concrete product. The invention relates to a water-based drilling fluid which comprises the following components in parts by weight: 10-30 parts of sodium silicate, 20-40 parts of calcium nitrate, 1-10 parts of sodium hydroxide, 5-20 parts of microbeads, 5-20 parts of silica fume, 20-70 parts of deionized water, and 1-10 parts of a defoaming agent, a dispersing agent and a stabilizing agent based on the total mass. According to the invention, micro-nano hydrated calcium silicate is prepared by using a coprecipitation method, and micro-beads and silica fume are taken as carriers and are combined with hydrated calcium silicate to form a child-master batch by adjusting the pH value and surface tension of a liquid phase, so that the preparation of the cascade hydrated super-early-strength material is realized.

Подробнее
17-02-2016 дата публикации

Soft frame is decorated to perspective window

Номер: CN0205031001U
Автор: ZHENG XINGUO
Принадлежит:

Soft frame is decorated to perspective window, mainly by soft frame strip, the transparency, a plurality of subassembly and corresponding self -tapping screw constitutions inlayed, it comprises last inserts and lower inserts to inlay the subassembly, it sets up a slotted hole respectively with lower inserts to go up the inserts, it seals to go up the slotted hole top of inserts, the slotted hole of inserts link up from top to bottom down, soft frame strip encloses into frame structure, set up a plurality of through -holes on the soft frame strip, transparency edge -fixed in the middle of the door curtain, go up the inserts and pass the through -hole of soft frame strip from top to bottom with lower inserts, self -tapping screw passes the slotted hole that the inserts was gone up in the entering of soft frame strip by the slotted hole of lower inserts. The utility model discloses an use soft frame strip to fix the transparency on the door curtain, messenger's perspective window can be freely ...

Подробнее
08-07-2009 дата публикации

Vertical connected plate type unballasted track cement emulsified bitumen mortar

Номер: CN0101475349A
Принадлежит:

The invention relates to a cement emulsified bitumen mortar for vertical connecting plate type ballastless rails, which comprises the following components in portion by weight: 1,370 to 1,516 portions of dry material, 230 to 270 portions of emulsified bitumen, 0 to 68 portions of polymer emulsion, 162 to 210 portions of water, 0.5 to 5 portions of water reducing agent, and 0 to 4 portions of antifoaming agent. The cement emulsified bitumen mortar has the advantages of good environment adaptability and working performance, agreeable mechanical property, small shrinkage, good crack resistance and superior lasting quality, is the cement emulsified bitumen mortar with high elasticity modulus, and can satisfy the requirements on different construction and use environmental conditions of the vertical connecting plate type ballastless rails for high speed railways and passenger dedicated lines in China.

Подробнее
28-04-2023 дата публикации

Plane coordinate measurement data overlapping method and system for operating ordinary-speed railway

Номер: CN116029036A
Принадлежит:

A plane coordinate measurement data lap joint method for operating a general speed railway comprises the steps that plane coordinate measurement data in a lap joint area and within a certain distance between the two ends are screened, the screened plane coordinate measurement data are sorted according to the line trend, and therefore measurement data selection of a local reconstruction design area is completed; according to plane coordinate measurement data in the local reconstruction design area, completing local linear reconstruction design, and calculating plane deviation of two times of measurement data in the lap joint area; the plane deviation difference of the two-time measurement data in the lap joint area is calculated, and whether the two-time measurement data meet the lap joint precision requirement or not is judged according to the calculation result of the plane deviation difference; when the two-time plane coordinate measurement data in the lap joint area meet the lap joint ...

Подробнее
19-11-2014 дата публикации

Grouting bag for grouting and lifting of ballastless track and manufacturing and using method thereof

Номер: CN104153260A
Принадлежит:

The invention relates to a grouting bag for grouting and lifting of a ballastless track and a manufacturing and using method of the grouting bag. The grouting bag is formed by selecting and sewing materials high in strength, small in thickness, good in breathability and small in dry heat shrink rate, the length and shape of the grouting bag are determined according to the structural size and settling volume of the ballastless track, one end of the grouting bag is closed, the other end of the grouting bag is open, a grouting pipe is inserted into the open end of the grouting bag, an opening of the grouting bag is tightened around the grouting pipe, the rest of a bag body is tightly folded and wound outside the grouting pipe, and cloth bags of corresponding shapes and sizes are numbered according to the different lifting amounts. Before grouting, the correspondingly-numbered grouting bags with the grouting pipes inserted are inserted into correspondingly-numbered grouting holes in the lower ...

Подробнее
15-12-2010 дата публикации

Special interface agent for CRTS concrete base plate of ballastless track and preparation method thereof

Номер: CN0101914328A
Принадлежит:

The invention relates to a special interface agent for a CRTS concrete base plate of a ballastless track, which comprises the following components in parts by weight: 20-40 parts of a high molecular polymer, 0-5 parts of a film-forming adjuvant, 0.5-1.0 part of a mildewproof agent, 0.1-0.3 part of a thickening agent, 0-0.5 part of a pH regulator, 40-60 parts of water and 0.3-1 part of a defoaming agent. The preparation method of the special interface agent comprises the following steps: adding the components in parts by weight to a stirring vessel at a speed of 400-500r/min, stirring for 5-10 minutes, adding 0.3-1 part of the defoaming agent, and evenly stirring with stirring speed of 150-250r/min to obtain a product. The special interface agent of the invention can seal capillary pores and slits of the concrete base plate, lower absorbability, prevent moisture in cement-emulsified asphalt mortar from being too quickly infiltrated into a bottom layer, avoid occurrence of penetration air ...

Подробнее
24-09-2014 дата публикации

Local grinding method of stainless steel continuous casting billet

Номер: CN104057382A
Принадлежит:

A local grinding method of a stainless steel continuous casting billet comprises operation steps as follows: (1), the casting billet is firstly placed on a grinding machine; (2), surface inspection is performed on a grinding machine, and a surface defect is drawn firstly by a chalk when found; (3), local grinding is performed under the conditions of grinding head feed of 40 mm and a reduction parameter of 3,000, and then steel is turned; (4), inspection treatment is performed on the second surface after the steel is turned with the same method; (5), blanking is performed after local grinding, and the qualified amount is reported; and (6) if numerous surface defects are found and local grinding cannot be realized, overall grinding is performed on the whole group. According to the local grinding method, the grinding loss ratio is reduced by 0.49%, at the same time, the yield is improved, and the production efficiency is improved by 185.71%.

Подробнее
28-04-2023 дата публикации

Method for repairing void of operation high-speed rail ballastless track extruded sheet

Номер: CN116024856A
Принадлежит:

The invention discloses a void repairing method for an extruded sheet of a ballastless track of an operation high-speed rail. The void repairing method comprises the steps that anchor bars are implanted into a bridge abutment of a to-be-repaired area; a gap formed by the extruded sheet between the base plate of the ballastless track and the bridge abutment is cleaned, and the lower surface of the extruded sheet is cut and trimmed; a gap between the trimmed extruded sheet and the base plate is placed in a pouring bag in a disengagement mode; temporary pressing devices are arranged on the upper side and the lower side of the bridge abutment and the base plate through anchor bars so as to carry out temporary buckling and pressing on the extruded sheet and the gap disengagement between the bridge abutment and the base plate; a high-flow-state self-filling grouting material is injected into the portion, between the buckled abutment and the base plate, of the pouring bag till the void area is ...

Подробнее
17-08-2021 дата публикации

High-durability engraved mark on concrete surface and construction method

Номер: CN113264781A
Принадлежит:

The invention discloses a high-durability engraved mark on the concrete surface and a construction method. The construction method comprises the steps that a horizontal or non-horizontal mark groove is engraved in the concrete surface according to a preset mark; for the horizontal mark groove or the non-horizontal mark groove, the bottom of the mark groove is coated with a capillary crystalline material, and a capillary crystalline layer is formed; or, for the horizontal mark groove, an interface agent is coated at the bottom of the mark groove to form an interface layer; the interface layer is filled with a self-leveling material or a paste material to form a filling layer; for the non-horizontal mark groove, the bottom of the mark groove is coated with an interface agent, and an interface layer is formed; and a paste material is poured on the interface layer to form a filling layer. According to the method, designed patterns or mark information can be clearly displayed, the concrete can ...

Подробнее
08-07-2009 дата публикации

Dry material for vertical connected plate type unballasted track cement emulsified bitumen mortar

Номер: CN0101475350A
Принадлежит:

The invention relates to a dry material used for a cement emulsified bitumen mortar of vertical connecting plate type ballastless rails, which comprises the following components in portion by weight: 100 portions of gelled material, 138 to 195 portions of sand, 0.05 to 0.5 portion of fiber, 0.003 to 0.01 portion of aluminum powder, 0 to 0.1 portion of polymer, and 0 to 10 portions of stone dust. By adding fiber, particularly hydrophilic fiber to dry materials, the toughness, the shock resistance and the fatigue resistance of the mortar prepared from the dry materials can be improved, the bleeding phenomenon of the mortar can be avoided and the lasting quality of the mortar can be improved; simultaneously, by selecting different gelled materials, particularly the combinations of between the different gelled materials, the problem that the prior dry material and the mortar prepared from the dry materials are difficult to satisfy the requirements on various construction environments and use ...

Подробнее
05-11-2014 дата публикации

Lifting repair method for ballastless track with settled curved section

Номер: CN104131498A
Принадлежит:

The invention belongs to the technical field of repair of high-speed railway ballastless tracks and particularly relates to a lifting repair method for a ballastless track with a settled curved section. The lifting repair method for the ballastless track with the settled curved section comprises the steps that after a lifting unit and the lifting quantity of the curved section of the ballastless track are determined, a high-pressure grouting device is adopted, grouting is conducted on a lifting hole and a filling hole in sequence according to determined equipment parameters, hole positions, a grouting sequence, a grouting rhythm and construction steps with a triangle balance lifting method at a certain pressure, grouting materials are injected into the position below the ballastless track through a grouting pipe installed in the grouting hole in advance and are rapidly cured, longitudinal displacement change, transverse displacement change and vertical displacement change of the track are ...

Подробнее
25-04-2023 дата публикации

Method for replacing and repairing operation high-speed rail ballastless track extruded sheet

Номер: CN116005499A
Принадлежит:

The invention provides an operation high-speed rail ballastless track extruded sheet replacing and repairing method, and relates to the technical field of railway ballastless track structure repairing. Edge sealing structures are arranged on the two sides of a line at the design position of the original damaged extruded sheet and the exposed end of the beam end, and a grouting area is formed; a grouting pipe is inserted into the grouting area, and a grouting material is evenly injected into the grouting area according to the amount of the grouting material needed by the grouting area; the grouting pipe is taken out, and a temporary pressing device is arranged on the base plate on the upper side of the grouting area; and the grouting material reacts and expands, the grouting area is densely filled, and the extruded sheet is obtained after curing. According to the method, after the original damaged extruded sheet is thoroughly removed, the material similar to the extruded sheet is cast in ...

Подробнее
11-04-2023 дата публикации

Method for improving interface connection performance between filling layer and track plate

Номер: CN115948942A
Принадлежит:

The invention discloses a method for improving interface connection performance between a filling layer and a track plate. The method comprises the following steps: preparing isolation cloth which is consistent with a bottom plate of the track plate in size and can permeate and adsorb cement paste on two sides; after track plate concrete is vibrated and flattened, isolation cloth is flatly laid at the bottom of the track plate, so that a slurry-rich layer on the surface of the track plate concrete permeates into the isolation cloth, and a strong-bonding compact cement slurry layer is formed by the slurry-rich layer and the isolation cloth; the method comprises the following steps: paving a track plate with isolation cloth adhered to the bottom, performing fine adjustment and edge sealing, then pouring self-compacting concrete, in the pouring process of the self-compacting concrete, enabling internal floating slurry to permeate into the isolation cloth adhered to the bottom surface of the ...

Подробнее
25-07-2023 дата публикации

Railway roadbed slope surface scouring stability analysis method

Номер: CN116484480A
Принадлежит:

The invention discloses a method for analyzing scour stability of a railway roadbed slope surface. The method comprises the following steps: S1, establishing a railway roadbed slope surface starting flow velocity formula; s2, drawing a starting particle size and starting flow velocity curve graph; s3, determining a discrimination standard; s4, analyzing the particle size of slope soil particles; s5, calculating the slope flow velocity; and S6, determining the stability.

Подробнее
26-02-2014 дата публикации

Continuous open casting technique of high alloy stainless steel

Номер: CN103600048A
Принадлежит:

Disclosed is a continuous open casting technique of high alloy stainless steel. The high alloy stainless steel is made from chemical components, including, not larger than 0.020 part of C, not larger than 1.00 part of Si, not larger than 2.00 parts of Mn, not larger than 0.045 part of P, not larger than 0.035 part of S, 19.00-23.00 parts of Cr, 4.00-5.00 parts of Mo, not larger than 0.100 part of N, 23.00-28.00 parts of Ni, 1.00-2.00 parts of Cu, and the balance of iron and unavoidable impurities. The technique includes: 1, operating plugging dummy ingots; 2, controlling off-taking of molten steel; 3, cooling a crystallizer; 4, controlling superheat of the molten steel. The continuous open casting technique of high alloy stainless steel has the advantages that the problem of steel leakage caused by connection cracking and cracking of blank shell thin parts during open casting of the high alloy stainless steel is solved, fewer production accidents occur, production efficiency is higher, ...

Подробнее
26-01-2011 дата публикации

Emulsified bitumen for vertical connected plate type unballasted track cement emulsified bitumen mortar

Номер: CN0101475747B
Принадлежит:

The invention relates to emulsified asphalt for longitudinal connecting plate type ballastless track cement emulsified asphalt mortar. The emulsified asphalt comprises the following components in percentage by weight: 60 to 65 percent of asphalt, 0.2 to 5 percent of anionic emulsifier, 0.02 to 3 percent of stabilizing agent, 0 to 4 percent of assistant, and the balance being water; and the wax content of the asphalt is less than or equal to 2.2 percent. The emulsified asphalt for the longitudinal connecting plate type ballastless track cement emulsified asphalt mortar has good emulsifying effect, is not only suitable for storage and usage under normal temperature environment, but also suitable for storage and usage under the environment of lower temperature or higher temperature, and has the advantages of good storage stability, strong temperature adaptability and the like; and the cement emulsified asphalt mortar prepared by the emulsified asphalt has the advantages of long working time ...

Подробнее
28-07-2023 дата публикации

Nanofiber-particle composite reinforced high-modulus polyurethane composite material and preparation method thereof

Номер: CN116496517A
Принадлежит:

The invention discloses a nanofiber-particle composite reinforced high-modulus polyurethane composite material and a preparation method of the nanofiber-particle composite reinforced high-modulus polyurethane composite material. The nanofiber-particle composite reinforced high-modulus polyurethane composite material is prepared from a polyurethane composite material consisting of resin, a curing agent and a nano reinforced material and modified reinforced fibers according to the steps of firstly performing ultrasonic treatment and then performing mixing processing. According to the invention, a multi-scale topological structure is formed between polyurethane resin and reinforced fibers by introducing a nano-composite network reinforced structure formed by modified nano-fibers and particles, and nano-particles are combined near the nano-fibers through interaction force between the modified nano-fibers and the nano-particles, so that the nano-particles are combined near the nano-fibers; the ...

Подробнее