62results about How to "Fully filled" patented technology

The application provides a phosphogypsum-based light high-strength steel pipe concrete and a preparation method thereof, and relates to the technical field of the steel pipe concrete.The steel pipe concrete comprises the following raw materials in parts by weight: 450-500 parts of a hydraulic cementitious material, 255-272 parts of phosphogypsum light aggregate, 480-610 parts of gravel with a particle size of 4.75-19.0 mm, 708-743 parts of medium-coarse sand, 3.24-5.85 parts of a water reducing agent and 150-156 parts of water; the hydraulic cementitious material is a gypsum-slag cement containing modified phosphogypsum.The application realizes the lightness, controllable micro-expansion property and good corrosion resistance of the steel pipe concrete on the basis of ensuring the strength of the steel pipe concrete, and controls the manufacturing cost of the steel pipe concrete.

The utility model relates to the technical field of methanol recovery, in particular to a methanol recovery device. The methanol recovery device comprises a tank body, two ends of the tank body are respectively provided with a water inlet pipe and a water outlet pipe, and the outer side wall of the tank body is provided with a gas inlet pipe and a gas outlet pipe; a spraying head is further arranged in the tank body, the spraying head is located in the tank body, the spraying head is rotationally connected to the water inlet pipe, the spraying head is provided with at least one spraying opening, and the spraying head can be driven to rotate in the process that the absorbent is sprayed out through the spraying opening. According to the utility model, the rotatable spray header is arranged in the tank body, and the spray header is driven to rotate through counter-acting force in the process of spraying an absorbent by the spray header, so that the absorbent sprayed by the spray header can fully fill the area inside the tank body, and gas methanol can be fully contacted with the absorbent.

The application relates to an anode target disc welding structure and an anode target disc preparation method. The anode target disc welding structure comprises a ring-shaped base, a ring-shaped base body and solder. Two stop portions are recessed on one side of the ring-shaped surface of the ring-shaped base. A raised ring is formed between the two stop portions, and the surface of the raised ring is provided with a plurality of spaced grooves. The ring-shaped base body is located on one side of the ring-shaped base close to the stop portions. Two stop rings are protruded on the ring-shaped surface of the ring-shaped base body close to the ring-shaped base, and a containing groove is formed between the two stop rings. The containing groove corresponds to the raised ring and can accommodate the raised ring. The ring-shaped base body and the ring-shaped base have a preset containing space. The solder is located on the raised ring. The volume of the solder is not less than the volume of the preset containing space. The application can improve the connection strength and stability between the ring-shaped base and the ring-shaped base body, thereby improving the stability and reliability of the anode target disc work.

The application belongs to the technical field of bamboo processing, and particularly relates to a preparation method of improved reconstituted bamboo, wherein the defibrated bamboo bundle is stepwise impregnated by preparing etherified melamine formaldehyde resin and modified phenolic resin. First, the bamboo bundle is impregnated by the etherified melamine formaldehyde resin with small molecular size, low viscosity and good water solubility, so that the etherified melamine formaldehyde resin can deeply enter the cell wall and the inner part of the micropore of the bamboo, fully fill the pores and block the hydrophilic channels, and meanwhile, the mildewproof agent is uniformly delivered to the inner part of the bamboo. Further, the bamboo bundle is impregnated by the phenolic resin with large molecular size and modified by flexible sugar ring units, so that the phenolic resin can be enriched on the surface of the bamboo bundle and the bonding interface, a flexible bonding layer is formed, the flexible molecular chain can buffer the residual stress of the interface, the bonding layer flexibility and the bonding strength of the bamboo bundle are improved, and the structural stability of the reconstituted bamboo during long-term use is further ensured.

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

This utility model relates to the field of highway maintenance equipment, and in particular to a roadbed maintenance pavement crack sealing device. It includes a base plate with a crack sealing mechanism on top and a position adjustment mechanism located on one side of the base plate. The position adjustment mechanism includes a first sliding plate slidably connected to one side of the base plate, with a first lead screw threadedly connected to its center. The distance between two adjusting rods located at the top of a telescopic tube is adjusted by moving two second sliding plates, thereby driving the connecting frame to move vertically downwards. This allows the telescopic tube to penetrate deep into the crack while maintaining its vertical position and preventing bending. When encountering wider cracks, the first sliding plate moves the telescopic tube within the crack, eliminating the need to move the sealing device along the front and back sides. This allows for adjustment of the telescopic tube's position according to the crack's width and depth, ensuring thorough crack filling and improving the quality of crack repair.

The present application relates to waterproof construction technology field, specifically to a kind of waterproof roll and its construction method.The waterproof roll includes roll body, and roll body is equipped with first connecting portion and / or second connecting portion;First connecting portion is connected with the second connecting portion of adjacent waterproof roll, and second connecting portion is connected with the first connecting portion of adjacent waterproof roll;First connecting portion includes first base material, at least two insertion slots in first base material and recess between adjacent two insertion slots, and second connecting portion includes second base material, at least two insertion parts in second base material and convex part between adjacent two insertion parts, the depth direction of insertion slot and recess is parallel to the thickness direction of roll body, insertion slot and insertion part are connected with stopper, recess and convex part are connected with stopper;Recess bottom and the top surface between convex part are equipped with adhesive layer, and adhesive layer is the structure layer that metal dense net and adhesive are made into by electromagnetic induction welding.

The present application relates to the technical field of energy storage, in particular to a circuit board heat dissipation assembly, a preparation method thereof, and an energy storage system, the circuit board heat dissipation assembly comprising a circuit board, a frame, a heat-conducting glue, and a functional component; the circuit board has a heat dissipation area and a connecting area, and the connecting area is arranged around the heat dissipation area; the frame is formed with a heat dissipation cavity; the functional component covers a first open end of the heat dissipation cavity, the circuit board is arranged in the frame through the connecting area to cover a second open end of the heat dissipation cavity, and the heat dissipation area is communicated with the heat dissipation cavity; the heat dissipation area is provided with a glue pouring hole and a glue overflow hole communicated with the heat dissipation cavity; the heat-conducting glue is configured to be injected into the heat dissipation cavity through the glue pouring hole when in a liquid state and solidified, and the heat-conducting glue is fixed to the heat dissipation area and the functional component, respectively. Through the arrangement of the frame and the heat-conducting glue, a heat conduction path is formed between the circuit board and the functional component, heat generated by the circuit board or the functional component can be efficiently conducted and dissipated through the heat-conducting glue, and the operation reliability of the circuit board and the functional component is ensured.

The utility model discloses a pouring tooling of super-long type CS coil, including mould core, frame subassembly, bottom plate and top plate, frame subassembly dismountably set up in the periphery of mould core, bottom plate and top plate set up in mould core and frame both ends, mould core includes a plurality of sub-mould core, first locating piece and second locating piece, the plurality of sub-mould core is distributed in the annular shape, the first locating piece is located in the first locating piece, and the second locating piece is located in the second locating piece. The mutual contact surfaces of every two adjacent sub-mold cores are inclined surfaces, the plurality of sub-mold cores are encircled to form a main mold core, the first positioning block and the second positioning block are arranged at the two ends of the main mold core, the first positioning block penetrates through the bottom plate, and the second positioning block penetrates through the top plate. The mold core is arranged to be of a detachable structure and comprises the sub-mold cores, the first positioning block and the second positioning block, the contact faces of the sub-mold cores are all inclined faces, through cooperation of the inclined faces, friction force is reduced, the demolding process is smoother, demolding convenience is greatly improved, and meanwhile the risk that a coil is damaged due to demolding is reduced.

The invention discloses a multi-level battery system nuclear capacity control method for an electric power frequency modulation energy storage station, and the method aims at the energy storage station which comprises a plurality of transformers, a plurality of energy storage containers hung below each transformer, and a plurality of PCS groups and parallel battery cabinets arranged in each container. The method comprises an energy storage container level capacity checking mode and / or a battery cabinet level capacity checking mode, and capacity checking is achieved by selecting an even number of energy storage containers to carry out internal energy mutual dragging in an energy storage container level; in the battery cabinet layer, an even number of battery cabinets are selected to carry out internal energy mutual dragging so as to realize capacity checking; meanwhile, a one-by-one cut-off charging and discharging control strategy of the direct-current side parallel battery pack is also provided. According to the method, the SOC accumulated deviation caused by long-term frequency modulation operation is effectively solved, the capacity evaluation accuracy is improved, the minimum interference on the frequency modulation service in the capacity checking process is realized, and the system availability rate is remarkably improved.

The utility model relates to food processing technical field discloses a kind of food processing quantitative bagging equipment, comprising: the bottom plate of supporting main body, the top rear side of the bottom plate is fixedly connected with support plate, the inner wall of the support plate is rotatably connected with rotating rod, the opposite end of the rotating rod is fixedly connected with electronic scale, the left end of left side support plate is fixedly connected with protection box, the front end of the protection box is fixedly connected with first motor, the rear end of the first motor is provided with transmission assembly, the top of the bottom plate is fixedly connected with support frame, the inner wall of the support frame is fixedly connected with discharging box.In the utility model, the food is weighed by being placed on the electronic scale, the first motor drives the worm at this time, the worm drives the worm wheel, the worm wheel drives the rotating rod, the rotating rod drives the electronic scale, the electronic scale drives the food to fall into the discharging box and then into the packaging bag, so that the weight of the material in each packaging bag can be consistent, and the product quality and consistency are improved.

The application discloses a preparation process of a heat-dissipating circuit board with inlaid copper columns and a product thereof, and comprises the following steps: (1) drilling; (2) copper plating; (3) placing copper columns and plating copper again. The application provides a preparation process of a heat-dissipating circuit board with inlaid copper columns and a product thereof, wherein holes are drilled in the area of the circuit board that needs heat dissipation, the hole wall is made conductive by copper plating, and copper columns are inlaid to achieve excellent heat-dissipating effect. The application adopts hole-filling electroplating technology to make the gap filling more sufficient by optimizing the process flow, and the adhesion between the copper column and the copper base material is not realized by glue but by electroplated copper adhesion.

The application relates to the technical field of bearing machining, and discloses an assembling device for industrial robot bearing machining, which comprises a machine table, a rotary placing seat is rotationally connected to the machine table, a grease injection seat and a placing table are respectively slidably connected to the machine table, a rotary plug is rotationally connected to the grease injection seat, a movable sealing gland is arranged above the machine table, a plurality of piston cylinders are arranged on the sealing gland, exhaust holes are arranged in the upper ends of the piston cylinders, piston sheets are slidably connected in the piston cylinders, and a movable annular moving frame is arranged on the sealing gland; in the application, air resistance is reduced during grease injection, uniform filling of lubricating grease is ensured, a small amount of grease injection is not needed, time and labor are saved, convenience and speed are achieved, pressure can be applied through a press-fitting block, two sealing covers can be simultaneously press-fitted on the two ends of a bearing, the press-fitting efficiency is improved, the working hours during bearing machining are reduced, and the machining efficiency is improved.

The utility model belongs to the technical field of valves, and particularly relates to a double-seal valve which comprises a shell. A sealing assembly is arranged in the middle of the shell; the middle part of the shell is in contact with a sealing cover; a sealing groove is formed in the side wall of the sealing cover; the middle part of the shell is fixedly connected with a sealed air bag; the sealing air bag is in contact with the inner wall of the sealing groove; the side wall of the sealing cover is fixedly connected with a fixed cylinder; the inner wall of the fixed cylinder is in threaded connection with a threaded rod; the outer wall of the threaded rod is rotationally connected with a hinge ring. A connecting plate is hinged to the end part of the hinge ring; a fixed block is hinged to the end part of the connecting plate; the side wall of the fixed block is fixedly connected with an arc-shaped plate; the arc-shaped plate is connected to the side wall of the sealing cover in a sliding mode, the shell and the sealing cover form a sealing assembly through the arranged protection shell, the valve does not need to be overall disassembled during disassembly, and convenience and rapidness are achieved. Meanwhile, the fixing cylinder, the connecting plate and other parts are matched with one another, the cover plate can be rapidly detached, multiple sets of bolts do not need to be screwed, and operation convenience is further improved.

The application relates to the technical field of radial tires, and discloses a belt layer composite structure based on shoulder delamination, which comprises a first belt layer, a second belt layer, a third belt layer and a 0-degree belt layer arranged on a tire; the second belt layer is provided with an adhesive material, and the 0-degree belt layer is arranged above the second belt layer through the adhesive material. The belt layer composite structure based on shoulder delamination changes the proportional size relationship of the control width C2, the thickness C0, the difference level AB02 and the thickness C1, realizes rational distribution design of the second belt layer, the 0-degree belt layer and the crown rubber material, guarantees full material filling, reduces air pocket above the second belt layer endpoint, simultaneously increases the thickness of the adhesive material, protects the full adhesion of the belt layer end part with the material, delays and reduces the damage and extension of the belt layer end part, so that the probability of early damage of the tire is reduced, and the durability and overall performance are improved.

The utility model discloses a system for automatically compensating glue amount according to seam width. The system comprises a PC industrial personal computer, an electronic scale, a 3D line laser, a motion control board card, a driver and a shafting motor, the PC industrial personal computer is in communication connection with the electronic scale, the 3D line laser and the motion control board card; the electronic scale is in communication connection with the PC industrial personal computer, the 3D line laser is in communication connection with the PC industrial personal computer, the motion control board card is in communication connection with the PC industrial personal computer and the driver, and the driver is in communication connection with the shafting motor. According to the utility model, the speed of the dispensing shaft system can be adjusted according to the actual seam width to automatically compensate the glue amount, so that the seam is fully filled with the glue, and the bonding strength and the sealing property of a product are improved; the glue dispensing requirements of different seam widths are met, and the flexibility and adaptability of the glue dispensing system are enhanced; and the precision is high, the glue amount is accurately controlled, the product yield is improved, the automation degree is high, manual intervention is reduced, and the working efficiency is improved.

The application discloses a manufacturing method of a high-heat-dissipation-efficiency pouring type driving transformer, and belongs to the technical field of power electronic equipment manufacturing. The method aims to solve the technical problems of low heat dissipation efficiency and insufficient long-term reliability of the existing driving transformer caused by the limited heat conduction performance of the pouring material, the simple surface heat dissipation structure and the difficult coordination of internal thermal stress. The method comprises the following steps: constructing a three-dimensional digital model of a reinforced heat dissipation structure with a boss array and a groove array and preparing a corresponding forming die; positioning a magnetic core and a winding as an insert in a die cavity; pouring insulating colloid with different mechanical and heat conduction properties in batches in a vacuum environment; through a segmented curing process, the flexible colloid is fully filled in the internal gap and buffers the stress, and at the same time, the high-heat-conduction rigid colloid forms an external main body and a heat dissipation structure, thereby forming an integrated pouring body. The method is used for manufacturing the driving transformer suitable for high-power-density and high-heat-dissipation scenes, and can significantly improve the heat dissipation capacity and operation reliability of the driving transformer.

This invention discloses a magnesium-lithium alloy cabin structure component and its forming method, belonging to the field of magnesium-lithium alloy forming technology. The method includes the following steps: S1. Pre-treatment of the magnesium-lithium alloy ingot, followed by free forging or extrusion to obtain a billet; S2. Die forging the billet and air-cooling it to room temperature to obtain a forging; S3. Holding the forging at 270~290℃ for 4~6 hours, then quenching it in cold water and performing T5 heat treatment; finally, aging strengthening by holding it at 180~220℃ for 8~12 hours. The forming method of this invention improves product uniformity through pre-treatment and enhances product strength and toughness through heat treatment. This forming method has broad application prospects and is expected to be industrialized.

This invention discloses a silicate colloid for high-solids-content, high-modulus composite fire-resistant glass and its preparation method, relating to the field of composite fire-resistant glass technology. Specifically, it describes a silicate colloid for high-solids-content, high-modulus composite fire-resistant glass and its preparation method. The colloid, by weight percentage, comprises a silicon source, water, glycerol / ethylene glycol / polyethylene glycol / polyglycerol, water-soluble organic acids and salts, water-soluble metal oxides or hydroxides, and alkali metal hydroxides, wherein the solids content is 60-75% and the modulus is 4.0-5.5. The preparation method includes: uniformly mixing the silicon source, water, additives, and functional additives, then adding alkali metal hydroxides, reacting at 50-90°C to obtain a prepolymer solution, followed by vacuum degassing. The viscosity is adjusted to the desired range by controlling the reaction conditions. This prepolymer solution is suitable for pouring or coating processes. After curing, the colloid forms a fire-resistant glass core layer. The resulting fire-resistant glass has advantages such as high light transmittance, ultra-thinness, dense foaming, low-temperature resistance, high weather resistance, and long lifespan.

The application relates to a preparation method of a high-toughness and strong-wear-resistant WC-Co coating and belongs to the technical field of thermal spraying cermet coating. Firstly, slurry mixed with WC powder, Co powder and an organic binder solution is sprayed and granulated to prepare spherical powder, then low-temperature heat treatment is carried out to obtain spherical WC-Co powder with certain cohesive strength, the spherical WC-Co powder is mechanically mixed with fine-particle boron nitride powder, high-temperature heat treatment is carried out above the eutectic point of WC-Co, WC-Co powder is separated through airflow classification, the powder after high-temperature heat treatment is deposited on the surface of a metal base through supersonic flame spraying, and a strong-wear-resistant WC-Co coating with nanocrystalline Co can be obtained. The application technology converts amorphous Co in a traditional coating into nanocrystals, improves the toughness of the coating and does not reduce the hardness of the coating.

This invention relates to the field of explosion-proof sensor technology and discloses a resin-encapsulated explosion-proof sensor. The sensor comprises: a cavity formed by combining the gas collecting hood cover and the gas collecting hood base; a gas-sensitive detection component, an expansion isolation component, and a secondary fast-sealing component sequentially installed from top to bottom within the cavity; the gas-sensitive detection component for real-time detection of hydrogen content in the air; and the expansion isolation component, through rapid filling with expansion material, achieving rapid gas isolation within the cavity via physical properties, thus providing a safe early warning effect. When the hydrogen concentration within the sensor's gas collecting hood exceeds the standard, the expansion material in the liquid bladder is triggered and rapidly expands. Because the liquid bladder is installed in a specific position, the expanded material quickly fills the surrounding space, separating the gas-sensitive detection cavity from the hydrogen and preventing further hydrogen diffusion, thereby achieving the function of rapid gas isolation and providing a safe early warning effect.

The application discloses a compact micro-bubble air floatation device for removing oil from oil and gas field production water, and belongs to the technical field of micro-bubble air floatation machines, which comprises a main tank body, wherein an oscillating assembly and a cleaning assembly are arranged in the main tank body, a main rotating shaft is rotationally connected to the main tank body through a bearing, the main rotating shaft is in transmission connection with the oscillating assembly and the cleaning assembly, and a solid-removing assembly is fixedly connected to the bottom of the main tank body. In the application, the oscillating assembly is arranged, the main rotating shaft drives a plurality of extrusion blocks to rotate through a connecting ring, the extrusion blocks drive a sliding rod to make a reset movement in cooperation with a reset spring, thereby realizing the reciprocating movement of the sliding rod, the sliding rod drives the baffle to reciprocate, the baffle drives the high-pressure spray pipe to reciprocate through a connecting rod, thereby expanding the range of the high-pressure spray pipe for spraying bubbles, enabling the bubbles to more fully fill the main tank body, and enabling the bubbles to more comprehensively adhere to oil and grease impurities, thereby improving the oil removal efficiency.

The utility model relates to camera technical field discloses an integral type camera module, including chip subassembly, chip subassembly includes circuit board, image sensor, support and light filter, image sensor is located on the upper end of circuit board, support is located on the upper end of image sensor, and support lower extreme is located in the non -photosensitive area of image sensor, the one end away from circuit board of support is provided with the mounting groove, light filter is located in the mounting groove, the lower end of support is provided with annular groove, the one end away from circuit board of support is provided with the through -hole of the intercommunication of annular groove, the one end away from circuit board of support is provided with the exhaust hole of the intercommunication of annular groove, through the through -hole injects the glue in annular groove to fixed mounting on the upper end of image sensor with support;Through setting up support in the non -photosensitive area of image sensor, avoid the support to occupy the placing space of circuit board component, improve the space utilization of circuit board to reduce the volume in the X / Y direction of circuit board, and then reduce the volume of camera module.

This invention relates to the field of electronic device packaging technology, specifically to a lubricating resin for semiconductor packaging molds and its application. The raw materials for its preparation include epoxy resin, a curing agent, an accelerator, and a release agent; the curing agent is phenolic resin; and the accelerator content is 0.5 to 5 parts per 100 parts of the total epoxy resin and curing agent. The lubricating resin for semiconductor packaging molds provided in this invention, after molding and high-temperature curing, exhibits excellent lubrication effects, effectively lubricating the mold surface and restoring the continuous operation of the mold. Furthermore, this resin has excellent fluidity at high temperatures, enabling it to fully fill some ultra-small injection nozzles, effectively avoiding problems such as difficulty in restoring continuous operation in unfilled areas due to poor local filling, thus improving operational efficiency.

The application relates to the field of welding and discloses an automatic welding method and device for a large ring-shaped component girth weld, which comprises the following steps: vertically clamping a workpiece on a biaxial positioner with rotary and overturning degrees of freedom; during the welding process, the spatial inclination of the workpiece is adjusted in real time through the biaxial positioner, the included angle between the weld line normal and the direction of gravity is maintained within a preset angle range, the workpiece is uniformly rotated through the biaxial positioner, the weld line sequentially passes through a composite welding head at a fixed spatial position in the circumferential direction, and a welding robot keeps the spatial posture of a welding gun fixed and only compensates the position based on a weld line tracking signal. The application has the beneficial effects that the flat welding state is kept during the whole welding process, the welding robot keeps the posture of the welding gun fixed, only the position compensation is carried out through the weld line tracking signal, the spatial angle of the welding gun does not need to be frequently adjusted, the unified and stable control of the welding parameters is realized, and the overall consistency of the girth weld is ensured.

The invention discloses a stainless steel composite plate welding method considering welding deformation control and welding efficiency. The stainless steel composite plate welding method comprises the following steps that (1) a stainless steel composite plate to be welded comprises a base layer and a composite layer; the base layer is carbon steel and the composite layer is stainless steel; (2) the two stainless steel composite plates to be welded are subjected to positioned welding assembly, the positioned welding assembly gap is controlled to be (0.2-0.3) b2 mm, and b2 is the thickness of the base layer; and (3) the stainless steel composite plate is welded, stainless steel composite plate welding seams comprise a base layer carbon steel welding seam, a transition layer stainless steel welding seam and a composite layer stainless steel welding seam, and each layer of welding seam only has one welding bead. The comprehensive welding quality (good corrosion resistance and mechanical property), welding deformation control, welding efficiency and cost of the stainless steel composite plate are considered; the method is suitable for connection of medium-thickness single-face stainless steel composite plates applied to the fields of petroleum, chemical engineering, light industry, ocean engineering, nuclear industry and the like.

The application discloses a kind of buried copper block circuit board and its manufacturing method, the manufacturing method includes: the two outer layers of core plate are copper foil layer, and window position A is provided on the non-line area of one outer layer;Core plate is double-sided inner layer pattern production, to make inner layer circuit pattern and pad on the two outer layers of core plate respectively, and make a plurality of flow blockings on one outer layer of core plate, which are surrounded outside window position A;The insulating layer is covered on the two outer layers of core plate, and window position B is provided on the insulating layer adjacent to flow blocking, which is opposite to window position A;Based on window position, insulating layer and core plate are windowed;After the copper block gap with rough surface is placed in window, it is compressed and handled, and in the process of compression, the flow of colloid in window is controlled by flow blocking, so that copper block is firmly combined with insulating layer and core plate together.The manufacturing method is simple and reasonable, easy to implement, the reliability and stability of the obtained circuit board product are high, and the market demand is met.

The utility model provides a basement terrace crack control device, which belongs to the technical field of terrace joint filling and comprises a handheld seat, a bearing sleeve is fixedly connected onto the handheld seat, a mounting pipe is fixedly connected into the bearing sleeve, a trowelling mechanism is arranged on the mounting pipe, a slurry storage cylinder is arranged in the mounting pipe, and the slurry storage cylinder is fixedly connected with the bearing sleeve. A grouting head is fixedly connected to the outer end of the slurry storage cylinder, a limiting ring is fixedly connected to the slurry storage cylinder, and a threaded block is fixedly connected to the outer end of the mounting pipe. Through the arrangement of the handheld seat, the slurry storage cylinder, the grouting head, the rack, the piston, the rotating shaft, the gear, the worm gear, the fixed seat, the motor and the worm, a constructor can hold the handheld seat by hand to enable the grouting head to uniformly grout into a floor crack, so that the crack is fully filled with slurry, automatic and uniform pushing and grouting are realized, the operation is simple, convenient and flexible, the complicated crack can be conveniently dealt with, and the construction efficiency is improved. The efficiency of crack filling control is improved, and the problems that in the prior art, grouting uniformity is poor, and construction efficiency is low are solved.

This invention relates to the field of tunnel secondary lining technology, and discloses a concrete construction testing device and its construction testing method. The concrete construction testing device includes a testing pipe, a cross-shaped overflow groove at the upper end of the testing pipe, a capping mechanism, a pressure-bearing venting mechanism, a pressure-bearing sealing mechanism, a ring pressure sensor, and a limiting nut. This invention uses the capping mechanism and the pressure-bearing venting mechanism to completely seal the cross-shaped overflow groove on the testing pipe. When grouting is injected into the arch, the pressure-bearing venting mechanism releases the gas until the concrete slurry enters the testing pipe. As the pressure applied by the concrete to the pressure-bearing venting mechanism gradually increases, the pressure-bearing venting mechanism squeezes the pressure-bearing sealing mechanism. The pressure-bearing sealing mechanism gradually expands under pressure, increasing the friction between itself and the inner wall of the testing pipe until it stops moving downwards. The concrete can then fully and densely fill the entire arch space.

The utility model discloses an ice cream machine with a multi-stage evaporator, which comprises a support case, a raw material stirring component, a first refrigerating component and a conveying component, the raw material stirring component, the first refrigerating component and the conveying component are arranged in the support case, and a control valve component is arranged on the support case; the first refrigeration assembly comprises a compressor, a condenser connected to the compressor and an evaporator connected to the condenser, and the conveying assembly is used for conveying prepared ice cream from the preparation cavity to the control valve assembly; the evaporator is internally provided with at least two refrigerant conveying cavities which are communicated with each other, and the refrigerant conveying cavities form a multi-stage evaporator structure. According to the ice cream evaporator, the isolating rings are arranged in the evaporator, and the refrigerating fluid conveying cavity is isolated into a plurality of independent cavities by the isolating rings, so that a refrigerating fluid is fully filled in the cavities, the inner shell is uniformly and fully contacted with the refrigerating fluid, finally, raw materials are uniformly refrigerated, and the prepared ice cream is better in consistency, more uniform and better in taste.