3449 results about "Wire mesh" patented technology

The invention relates to a fat cutting filter, a fat cutting filtering method and a fat cutting filtering device.The fat cutting filter comprises a shell, the interior of the shell is a treatment cavity, and the shell is provided with a first connector and a second connector which communicate with the treatment cavity; the cutting part is located in the treatment cavity and located between the first connector and the second connector, the cutting part comprises a rigid silk screen used for cutting fat, and the silk diameter of the rigid silk screen ranges from 0.05 mm to 1 mm. The mesh wires of the rigid silk screen are used for fat cutting, the structure is simple, operation is easy, convenient and efficient, the machining cost is low, the mesh diameter can be customized according to needs, the porosity can reach 90% or above, the cutting efficiency is high, and the problem of filtering blockage during fat cutting can be effectively solved.

1. Name of the Design Product: Assembled Multi-compartment File Rack. 2. Use of the Design Product: A wire mesh file rack for storing documents and sundries. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: 3D View of Design 4. 5. Design 4 is designated as the basic design.

A container for securing receipt of parcels or other items is disclosed. One embodiment includes a wire mesh collapsible container, closed at the bottom and sides and open at the top with a cinching mechanism that allows a parcel carrier to quickly and easily close the top, thus securing the package within. The container itself is secured to a fixed attachment point, and can only be opened by key once cinched by the carrier. Another embodiment includes a means for electronically notifying the parcel recipient once a package has been secured. Other embodiments are described and shown.

The invention relates to the technical field of building structures, in particular to a method for calculating node shear bearing capacity of a composite beam, which comprises the following steps of: decomposing the shear bearing capacity of a node core area into shear contribution components of a square steel tube web, encased concrete and a steel wire mesh, and respectively calculating the shear bearing capacity based on respective structural characteristics and stress mechanisms; the total shear bearing capacity is obtained through superposition; and each component is quantized by introducing correction coefficients of an axial compression ratio and a beam-column linear stiffness ratio. According to the method, the technical blank of shear resistance calculation of the concrete joint in the core-free area is filled, the error is controlled within + / -15%, and the method has the characteristic of high precision, is suitable for design of the composite beam joint filled with the concrete in the core-free area in a high-rise building and an underground structure, is high in engineering applicability and provides a reliable calculation basis for design of related building structures.

The invention relates to the technical field of electroplating equipment, in particular to electroplating wastewater treatment equipment which comprises a reaction cylinder, an air inlet pipe extending into an inner cavity of the reaction cylinder is fixedly connected to the side wall of the reaction cylinder in a penetrating manner, one end of the air inlet pipe is fixedly communicated with a vertical pipe, a rotating shaft is rotatably mounted in an inner cavity of the vertical pipe, and an aeration inner cylinder is fixedly arranged at the lower end of the vertical pipe; the steel wire mesh is arranged into an upper-layer structure and a lower-layer structure which are mutually rotated and staggered, and the driving gear and the inner gear ring are in transmission connection through a transmission gear; the device has the beneficial effects that a steel wire mesh is arranged at the upper end of a vertical pipe, the steel wire mesh is of an upper-lower double-layer structure and is mutually rotated and staggered, a driving gear is arranged at the upper end of a rotating shaft, a transmission gear is arranged between the driving gear and an inner gear ring for transmission, and floating bubbles can be effectively cut when the steel wire mesh rotates, so that the sizes of the bubbles are kept in a small state; the adhesion effect on fine suspended matters is improved, so that the treatment effect on the electroplating wastewater is improved.

The invention discloses an ecological restoration method for a bare rock side slope in a high and cold arid area, and belongs to the technical field of ecological restoration, the ecological restoration method for the bare rock side slope in the high and cold arid area comprises the following steps: (1) side slope pretreatment: firstly, mechanically chiseling a bare rock slope surface to form micro holes; a rhombic iron gauze is laid and anchored; (2) spray-seeding an anti-freezing and thawing base material to ensure that the base material uniformly covers the slope surface; wherein the freeze-thaw resistant base material comprises the following raw materials: weathered gravels, straw fibers, attapulgite clay, an inorganic compound fertilizer, a slow-release water-retaining agent, a cold-resistant microbial agent and mixed anti-freezing grass seeds; (3) covering the surface of the bare rock slope with an ecological blanket; (4) water management. The structural stability is enhanced through mechanical pretreatment, the anti-freezing and drought-resisting capabilities are improved through the composite anti-freezing and thawing base material, vegetation growth is promoted through cooperation of microorganisms and grass seeds, precise maintenance is achieved through an intelligent system, and a systematic solution for ecological restoration of the bare rock slope in the high and cold arid area is formed. The method has remarkable advantages in the aspects of improving the restoration efficiency, guaranteeing the ecological sustainability and the like.

The invention relates to a safe stoping process based on a weak rock mass condition, which comprises the following steps: S1, through three-dimensional geological modeling and crustal stress field measurement, dividing geological units and determining differentiated stope structure parameters; s2, layered stoping, wherein the stope advancing speed is dynamically adjusted according to the ground stress real-time monitoring data; s3, layered filling operation is implemented, a shape memory alloy wire mesh is preset in a filling body, and a grouting channel is reserved in the contact face of the filling body and the surrounding rock; according to the method, through a dynamic correlation model of crustal stress real-time monitoring and propelling speed, the crustal stress change rate is directly converted into a mining parameter adjustment instruction, and dynamic balance of mining strength and crustal stress release is achieved; multi-dimensional data such as ground stress, micro-seismic energy and displacement are collected in real time, data are fused through an algorithm, rock mass mechanical parameters are inverted, a numerical model is optimized, and regulation and control schemes such as stope advancing speed, supporting parameters and filling ratio are automatically generated based on a model prediction result.

The utility model discloses a solar cell constant tension printing screen, which comprises a screen frame, a metal wire mesh and a printing plate wire slot, the metal wire mesh is tensioned on the screen frame through a tensioning wire mesh, the printing plate wire slot is arranged on the metal wire mesh, the tensioning wire mesh bypasses the arc-shaped edge of the screen frame and is bonded on the outer frame wall of the screen frame, and the printing plate wire slot is arranged on the metal wire mesh. A tension sensor is arranged between the arc-shaped edge of the screen frame and the tensioning wire screen; and a silk screen tension pressure stabilizing strip is also propped against the tensioning silk screen and is movably supported on the screen frame through a thrust spring. The silk screen tension pressure stabilizing strip abuts against the inner side face of the tension silk screen and can support the tension silk screen. The tension sensor is a thin film pressure sensor, and the installation angle alpha of the tension sensor is 45 degrees. The tension sensors are installed on the arc frame edge of the screen frame, and at least one tension sensor is installed on the arc frame edge of each side edge of the screen frame. The screen printing plate can automatically adjust the tension of the silk screen so as to ensure the stability of the tension of the silk screen.

The invention relates to the technical field of liquid absorption cores of vapor chambers, in particular to a vapor chamber with a porous liquid absorption core of a secondary structure and a preparation method of the vapor chamber. The preparation method comprises the following steps that an upper cover plate and a lower cover plate are prepared; cutting the metal wire mesh to obtain a wire mesh structure, and fixing the wire mesh structure on the surface of one side of the lower cover plate; electroplating is carried out on the silk screen structure of the lower cover plate to deposit nano-copper; calcining and curing the secondary structure of the silk screen electroplated with the nano-copper; and packaging the upper cover plate and the calcined lower cover plate, and performing liquid injection, degassing, sealing welding and packaging treatment to obtain the vapor chamber. According to the vapor chamber, the liquid absorption core with a secondary structure is prepared on the silk screen of the lower cover plate through electro-deposition of nano copper, the nano copper structure on the silk screen serves as the liquid absorption core through calcination and solidification, the service life of the vapor chamber can be effectively prolonged, the secondary porous structure provides multi-stage hole distribution for the liquid absorption core, multiple liquid flowing channels are provided, and heat conduction is accelerated.

The invention discloses a thin-layer high-density filler which is prepared by combining an optimized weaving method, weaving density and a bundling mode on the basis of a plain woven wire mesh filler. The novel weaving method enables the weft number of the thin-layer high-density filler to be larger than that of plain woven wire mesh filler under the condition of the same warp number, and the thin-layer high-density filler has the characteristics of high specific surface area, high mass transfer efficiency, low flow pressure drop and the like. A large number of micropores exist on the surface of the thin-layer high-density filler, the wettability is extremely good, the transverse diffusion effect of liquid in the filler can be greatly enhanced due to the fact that the weft density is large, the performance is particularly outstanding in the processes of large-spraying-density rectification and the like, and the pressure drop is about 30%-50% lower than that of a common plain woven filler. The filler provided by the invention mostly adopts stainless steel wires as raw materials, and has the advantages of low cost, large flux, stable performance and low metal exudation rate, so that the filler is difficult to replace in the field of heat pump rectification, high-purity electronic chemical separation, intermediate separation and isomerism separation production.

The utility model relates to the technical field of inflatable hoses, in particular to a high-performance wear-resistant extremely-cold-resistant inflatable hose. The inflation hose comprises a metal corrugated pipe, the metal corrugated pipe is sleeved with a steel wire mesh sleeve, the steel wire mesh sleeve is sleeved with a long connecting pipe, the long connecting pipe is sleeved with a vulcanization layer, one end of the metal corrugated pipe is connected with a long inner cone connecting nozzle in an inserted mode, and the outer surface of the long inner cone connecting nozzle is sleeved with a nut in a threaded mode. And a long outer cone connecting nozzle is inserted into the other end of the steel wire mesh sleeve. The inflatable hose can meet the requirement of a dew point of-65 DEG C by adopting a metal corrugated pipe structure, can meet the requirements of 40MPa working pressure and 120MPa bursting pressure structure by adopting a steel wire mesh sleeve structure and adopting a high-pressure brazing form after double-layer weaving, and meanwhile, the vulcanization layer is arranged outside the long connecting pipe in a sleeving manner, so that the service life of the long connecting pipe is prolonged. Therefore, the inflatable hose has excellent oxidation resistance, ozone resistance and erosion resistance.

The invention belongs to the technical field of excavation slope retaining, and particularly relates to a cutting retaining wall structure and a construction method. A cutting retaining wall structure comprises a retaining wall foundation, a retaining wall body poured on the top of the retaining wall foundation, and a first concrete layer, a second concrete layer and a third concrete layer which are sequentially poured on the back face of the retaining wall body; the drainage assembly comprises a plurality of first drainage pipes, a large-diameter second drainage pipe communicated with the water inlet ends of the first drainage pipes, and a steel wire mesh framework wrapping the periphery of the second drainage pipe. In order to solve the problems that a backfill layer of an existing cutting retaining wall is difficult to compact and unsmooth in drainage, the retaining assembly and the drainage assembly which consider the compaction degree of the backfill layer of the wall back, ensure smooth drainage of the wall back and quickly clean fine-grained soil accumulated at the bottom are provided, so that the compaction degree of the backfill layer at the wall heel of a retaining wall foundation is ensured; the defect that top shallow layer pores of the retaining wall backfill layer are prone to being blocked is overcome, and meanwhile the retaining wall backfill layer is kept smooth in overall drainage.

The novel separator comprises a vertical tank body and a cooling pipe assembly, the cooling pipe assembly is arranged on the upper portion of the interior of the vertical tank body, a silk screen drop catching assembly is arranged above the cooling pipe assembly, and the silk screen drop catching assembly comprises an upper cover, a supporting sleeve, multiple layers of silk screens and a fixed partition plate. The supporting sleeve is sleeved on the multilayer silk screen, the upper cover is arranged at the top of the multilayer silk screen, a gap is arranged between the upper cover and the supporting sleeve, the supporting sleeve is fixed on the inner wall of the vertical tank body through a fixed partition plate, an exhaust port is arranged at the upper end of the vertical tank body, a pipeline of the exhaust port extends into the vertical tank body, and a steam filter is arranged at the lower end of the pipeline of the exhaust port. The mixed volume is primarily separated through gravity settling, liquid descends and is stored at the bottom of the tank body, gas ascends and sequentially flows through the cooling pipe assembly to be cooled and the silk screen drop catching assembly to be dewatered, finally, the gas is discharged after passing through the gas filter, and finally, gas separation, cooling and dewatering of high-temperature gas-liquid components are achieved.

The utility model provides a soft foundation levee slope reinforcing structure based on timber piles and geogrids. The soft foundation levee slope reinforcing structure comprises a soil levee body, a reinforcing levee slope, a soft soil levee foundation, the timber piles, a gravel soil backfilling layer, a ballast platform and the geogrids. An embankment top road is arranged at the upper part of the earth embankment body, and the side surface is an original embankment slope; the reinforced levee slope is located outside the original levee slope; the soft soil embankment foundation is located on the lower side of the soil embankment body. The lower ends of the timber piles are vertically inserted into the soft soil embankment foundation, and steel wire meshes are arranged at the tops; the gravel soil backfill layer is laid on the timber piles; the ballast platform is located on the upper side of the original levee slope and connected with the reinforced levee slope. The geogrids are located between the gravel soil backfill layer and the ballast platform and laid layer by layer along with filling of the ballast platform. The timber piles are used as the slide-resistant piles, so that the bearing capacity of the soft soil embankment foundation is improved; the stability and integrity of the levee slope are enhanced by adopting the ballast platform and the geogrid, the instability of the levee slope is prevented, the safety of the levee slope in the construction period and the operation period is guaranteed, and the engineering effect is good.

A wall having a 3D wire mesh panel having a core with a 3D wire mesh matrix extending through and out the core, and a structural material, such as concrete, envelopes the panel. A form positioned about the panel is used to introduce the concrete to the panel during production. Methods for producing the wall, which include producing the wall vertically at a desired location.

A wall having a 3D wire mesh panel having a core with a 3D wire mesh matrix extending through and out the core, and a structural material, such as concrete, envelopes the panel. A form positioned about the panel is used to introduce the concrete to the panel during production. Methods for producing the wall, which include producing the wall vertically at a desired location.

The invention discloses a high-strength composite pipe manufacturing method, and relates to the technical field of composite pipe production, and the method comprises the following steps: S1, inner ring welding: arranging and guiding inner ring reinforcing warps through a front end winding welding seat, and welding inner ring spiral wefts to the outer sides of the inner ring reinforcing warps through electric sparks, s2, mesh belt winding: wrapping a middle-layer steel wire mesh belt on the outer side of an inner-ring spiral weft through a middle-layer mesh belt winding welding seat, welding the middle-layer steel wire mesh belt on the outer side of the inner-ring spiral weft through electric sparks, and winding the middle-layer steel wire mesh belt on the outer side of the inner-ring spiral weft through a middle-layer steel wire mesh belt winding welding seat; the operation stability of production equipment is improved, the convenience of replacement and adjustment of the mesh belt storage roller is effectively improved, a mesh framework is formed by continuous online welding of warp-direction steel wires and inner and outer weft-direction steel wires, and the mesh framework and steel-plastic formed by one-time co-extrusion composite molding of polyethylene plastic penetrate through each other in a three-dimensional mode and are embedded with each other to jointly bear the working load.

The utility model discloses a filter device of a fiber melt spinning machine, which is characterized by comprising a metal sintering net filter element, a metal wire net fixedly arranged at the top of the metal sintering net filter element and metal sand filled in the metal sintering net filter element, a fixing ring is clamped at the top of the metal sintering net filter element, and the metal sintering net filter element is fixed on the fixing ring. The fixing ring is hollow, the metal wire mesh is clamped on the fixing ring, and the bottom of the fixing ring is clamped at the top of the metal sintered mesh filter element; according to the filtering device, a triple filtering mode is adopted, before polycarbosilane enters the spinneret plate, layered filtering is formed, large-particle impurities are effectively removed, the filtering effect is ensured, the metal sand plays a role in defoaming while filtering is conducted, the problem that the spinneret plate is blocked by a polycarbosilane macromolecular structure is effectively solved, and the filtering effect is improved. The continuity of the spinning length and the quality of produced fibers can be guaranteed, and stable proceeding of subsequent procedures is facilitated.

The invention discloses a diamond wire jumper and wire bow detection system for a polycrystalline silicon multi-wire cutting machine, and relates to the field of solar cell panel production quality detection.The diamond wire jumper and wire bow detection system comprises an image acquisition module used for acquiring a diamond wire mesh image; the image processing module is used for identifying each diamond wire mesh image and determining whether the diamond wire jumps or not and the wire bow value; the image processing module is arranged in the industrial personal computer, and the industrial personal computer displays the wire jumping information of the diamond wire mesh surface and the wire bow value of the diamond wire mesh surface in real time; the centralized monitoring platform is used for receiving the processing information of the industrial personal computer, determining whether diamond wire jumping and wire bow value abnormity exist or not and outputting a result; by designing the automatic cutting machine diamond wire jumper and wire bow detection system, a traditional field worker manual detection mode is replaced, and the labor efficiency of a polycrystalline silicon cutting workshop is improved.

The invention provides a ceramic heating plate and a processing method of the ceramic heating plate. The machining method of the ceramic heating plate comprises the steps that the ceramic heating plate formed through normal-temperature isostatic pressing is prepared, the upper surface of the ceramic heating plate is made of aluminum nitride, at least an electrostatic adsorption metal wire mesh electrode is embedded in the ceramic heating plate, the process temperature of normal-temperature isostatic pressing forming is lower than 25 DEG C, and the process air pressure of normal-temperature isostatic pressing forming is lower than 200 Mpa; the process temperature of the high-temperature and high-pressure sintering is higher than 1500 DEG C, the process air pressure of the high-temperature and high-pressure sintering is higher than 100 Mpa, and the high-temperature and high-pressure sintering is used for avoiding the use of a binder or a ceramic layer spraying process, so that the heating temperature is increased, the sparking phenomenon of an equipment corrosive agent under high electrostatic adsorption voltage is avoided, and the service life of the equipment corrosive agent is prolonged. The service life of equipment is prolonged; and the safety performance of the process is improved.

The invention discloses a gabion gabion net cage system for reinforcing a high-fill embankment of an expressway, belongs to the technical field of gabion gabion net cages, and solves the problems that in the prior art, external loads are resisted only through self-strength, and the gabion gabion net cage system and a filling body are difficult to form a synergistic deformation whole, so that the structure is cracked and fails. The system comprises an excavation roadbed, at least one group of filling slope foundations, gabion gabion gabion net cages and backfill discrete materials, according to the gabion gabion gabion grid net cage, through the synergistic effect of tensile resistance of the steel wire mesh and shear resistance of the block stones, the gabion gabion gabion grid net cage and the filling discrete material form a flexible-rigid composite structure, so that the high tensile property of the steel wire mesh can effectively restrain horizontal displacement and deep slippage of the filling material, and deformation of a side slope along a potential slippage face is restrained; and the gradation matching performance of the block stone filling structure and the backfill discrete materials enhances the occlusion effect between the materials, and the shear strength and the overall rigidity of the slope are remarkably improved.

The utility model belongs to the technical field of biomass biogas treatment, and discloses a biogas filtering device which comprises a tank body, a wire mesh demister and a cleaner, and the tank body is provided with a gas inlet, a gas outlet and a water outlet; the interior of the tank body is divided into an upper cavity and a lower cavity by the wire mesh demister, the upper cavity is communicated with the air outlet, and the lower cavity is respectively communicated with the air inlet and the water outlet; the cleaners are connected with the tank body through flanges, each cleaner comprises a water inlet end and a water outlet end, the number of the cleaners is two, and the two water outlet ends extend into the upper cavity and the lower cavity respectively and face the wire mesh demister. Through the arrangement of the cleaner, the wire mesh demister can be quickly cleaned, the time cost and the labor cost required for disassembling the tank body and the wire mesh demister are saved, and the biogas treatment efficiency is effectively improved.

The invention belongs to the technical field of pipe manufacturing, and particularly relates to a manufacturing method of a surface-traceless water supply steel wire mesh reinforced polyethylene composite pipeline, which comprises the following steps: core layer extrusion molding, core layer vacuum cooling shaping, steel wire winding, outer layer PE raw material covering, internal pressure sizing and gradient cooling, code spraying, cutting and sealing. The gradient cooling is divided into three stages of cooling, the first stage is pre-cooling shaping and warm water spraying pre-cooling, shock cooling hardening of the surface of a melt is avoided, meanwhile, internal pressure sizing is conducted on the pipe, the pipe wall is made to be tightly attached to a sizing sleeve through internal air pressure, and concave-convex marks of the steel wire mesh composite pipe are eliminated; gradient cooling is adopted in the second stage, multi-stage water tank segmented cooling is adopted, and the temperature of each stage of water tank is adjusted; and the third stage is post-cooling treatment, low-temperature aerial fog cooling is adopted to further eliminate internal thermal stress, and the temperatures of the first stage, the second stage and the third stage are gradually reduced. The melt flow stress can be eliminated, the crystallization rate is controlled, the internal thermal stress is eliminated, and the pipe quality is ensured.

The invention relates to the technical field of wire mesh demisters, in particular to a wire mesh demister for gas-liquid separation, an annular rotating groove is reserved between an outer pipe and an upper pipe, a fluted disc rotationally mounted through a bearing is arranged at the upper end of the outer pipe and the upper end of the upper pipe, and an extension rod extending along the annular rotating groove and fixedly connected to the fluted disc is arranged on the rotating pipe; the air suction device has the advantages that the rotatable rotating pipe is arranged in the middle of an existing silk screen layer, the piston rod is matched with the one-way valve, the air suction purpose is achieved, then the piston rod is driven to descend to extrude air flow, the air suction effect is improved, and the service life of the air suction device is prolonged. The air flow is discharged along the opening groove right facing the silk screen layer, the adhered water drops are blown to be rapidly gathered to form water drops to drop, blocking is avoided, through cooperation of the driving assembly and the linkage assembly, the rotating pipe is driven to rotate along the circumference of the silk screen layer while the piston rod descends, and full-angle cleaning of the silk screen layer is achieved.

The invention discloses a profiled steel sheet light steel skeleton foam concrete composite floor slab and a mounting method thereof. The composite floor slab comprises a light steel skeleton, and alkali-resisting gridding cloth is arranged on the bottom face of the light steel skeleton; a steel wire mesh is arranged on the bottom surface of the alkali-resistant gridding cloth, and a profiled steel sheet is arranged on the top surface of the light steel framework; the steel wire mesh is welded with the light steel framework, and the profiled steel sheet is fixedly connected with the light steel framework; foam concrete is filled between the steel wire mesh and the profiled steel sheet. According to the profiled steel sheet light steel framework foam concrete composite floor slab and the mounting method thereof, the problems that in the prior art, a foam concrete floor slab is prone to cracking, poor in waterproof effect, difficult in wiring and the like are solved, and the purposes that the cracking risk of the foam concrete floor slab is reduced, meanwhile, the waterproof performance is improved, and various pipelines can be arranged conveniently are achieved.

The invention relates to the technical field of composite pipe manufacturing, in particular to a steel wire mesh pipe framework automatic braiding device which comprises a first winding assembly, a second winding assembly, a transmission assembly, a driving assembly and a rack, a through hole is formed in the rack, the first winding assembly and the second winding assembly are both rotationally connected with the rack, and the transmission assembly and the driving assembly are arranged on the rack. The through hole, the first winding assembly and the second winding assembly are coaxially arranged; the transmission assembly and the driving assembly are both fixed to the rack, the transmission assembly is connected among the first winding assembly, the second winding assembly and the driving assembly, and the rotation direction of the first winding assembly is opposite to that of the second winding assembly. According to the invention, forward and reverse steel wire winding can be simultaneously carried out, and adjacent forward and reverse rotating steel wires are mutually restricted at the overlapping point, so that the steel wires are effectively prevented from sliding in the axial direction of the pipe when being axially stressed, and the uniformity and the structural stability of a steel wire mesh framework grid are remarkably improved.

The gravel geology pit-in-pit dewatering construction method comprises the following steps that a foundation pit dewatering tube well is excavated and arranged on the side edge of a large foundation pit, and the water level is lowered to the preset elevation; a local ultra-deep position dewatering well with the preset depth is excavated and arranged on the side edge of the pit in the pit, and a dewatering well protection cage formed by binding a reinforcing steel bar structure in a well pipe shape and densely covering a steel wire net is arranged; a submersible pump is put into the precipitation well protection cage, and the submersible pump is started for pit-in-pit precipitation; keeping rainfall, and carrying out formwork construction of a concrete cushion layer in the pit; and after the concrete cushion layer of the pit-in-pit reaches the strength, form removal is conducted, the submersible pump is taken out, the dewatering well at the local ultra-deep position is backfilled, and cushion layer construction of the large foundation pit is conducted. According to the construction method, formwork erecting construction of the concrete cushion layer in the pit is firstly carried out, then the dewatering well at the local ultra-deep position is backfilled, and then cushion layer construction of the large foundation pit is carried out, so that the integrity is guaranteed; by means of the dewatering well protection cage, the dewatering effect is guaranteed, cost is reduced, the dewatering well protection cage is denser after backfilling, and the structural strength is improved.

A liquid hydrogen storage tank capable of eliminating thermal stratification with low turbulence relates to the field of liquid hydrogen storage and comprises a tank body and a spray rod mechanism arranged in the tank body, the spray rod mechanism is communicated with a liquid hydrogen circulation pipeline, and liquid hydrogen in the tank body is extracted by the liquid hydrogen circulation pipeline and sprayed to a heat leakage point through the spray rod mechanism. The spray rod mechanism comprises a main guide pipe and a plurality of branch guide pipes, the tail ends of the branch guide pipes are provided with distribution assemblies attached to the heat leakage points, and the distribution assemblies are of structures defined by elastic metal wire meshes and filled with porous media, so that liquid hydrogen is dispersed and sprayed to the heat leakage points through the porous media, and turbulence of the liquid hydrogen is reduced. The spray rod mechanism is arranged in the storage tank, and the liquid hydrogen is directly sprayed to the heat leakage point by utilizing the guide pipe and the distribution component of the spray rod mechanism, so that turbulence of the liquid hydrogen in the tank is reduced, and evaporation of the liquid hydrogen caused by heat leakage is slowed down.

The invention relates to the field of vibrating screens, and particularly discloses a vibrating screen and a screen plate thereof.The vibrating screen comprises a frame body, the frame body comprises two symmetrically-arranged side plates, two connecting plates are fixedly arranged between the two side plates, the two connecting plates are arranged at the two ends of the side plates, a screen is detachably connected between the two connecting plates, and the screen is formed by splicing a plurality of steel wire meshes; the steel wire mesh is in a wave shape in the length direction of the steel wire mesh, frames are fixedly arranged on the four edges of the steel wire mesh, the motor drives the vibrator to rotate so that the screen plate can vibrate, the moving stroke of materials on the wave-shaped screen mesh is prolonged through the wave-shaped screen mesh, and therefore the contact time of the materials and the screen mesh is prolonged, the screening duration of the materials is prolonged, and the screening effect of the materials is improved. And meanwhile, the screen mesh is detachably connected between the connecting plates, so that when the screen mesh is partially damaged, the screen mesh can be maintained by replacing a single steel wire mesh.

The light steel framework foam concrete composite floor slab comprises a light steel framework, at least two layers of alkali-resisting gridding cloth are arranged on the bottom face of the light steel framework, and grids of every two adjacent layers of alkali-resisting gridding cloth are arranged in a staggered mode; a first steel wire mesh is arranged on the bottom surface of the alkali-resistant gridding cloth on the lowermost layer, and a second steel wire mesh is arranged on the top surface of the light steel framework; the first steel wire mesh and the second steel wire mesh are welded with the light steel framework; foam concrete is filled between the first steel wire mesh and the second steel wire mesh. The light steel framework foam concrete composite floor slab provided by the invention solves the problem that a foam concrete floor slab in the prior art is easy to crack, and achieves the purposes of reducing the cracking risk of the foam concrete floor slab, improving the use stability and reducing the later maintenance difficulty.