454 results about "Pressure resistance" patented technology

The invention discloses pipeline anti-pressure capability detection equipment, and relates to the field of pipeline detection, the pipeline anti-pressure capability detection equipment comprises an equipment main body, a sealing clamping mechanism is arranged on the outer wall of an adjusting frame, the sealing clamping mechanism comprises a moving seat slidably mounted on the outer wall of the adjusting frame, and a sealing end seat is fixedly mounted on the side wall of the moving seat; a pressurizing pipeline used for pressurizing the interior of the pipeline is arranged in the center of the sealing end seat, a sealing air bag and clamping assemblies distributed at equal angles are arranged on the inner wall of the sealing end seat, and a self-adaptive adjusting mechanism is arranged at the bottom of the adjusting frame. According to the pipeline anti-pressure capability detection equipment, sealing and clamping of the end of a pipeline are synchronously completed by arranging the sealing and clamping mechanism, the sealing performance and stability in the detection process are remarkably improved, and the problems of air leakage and displacement during pressurization in the pipeline are effectively prevented; and through the arrangement of the self-adaptive adjusting mechanism, rapid adaptation to pipelines with various pipe diameters is realized, and the universality and the detection efficiency of the equipment are greatly improved.

The invention discloses a waterproof and pressure-resistant acceleration impact sensor, and relates to the technical field of impact detection, the waterproof and pressure-resistant acceleration impact sensor comprises a base, the bottom of the base is provided with a mounting screw groove, the top of the base is fixedly provided with a supporting stud, the outer ring of the supporting stud is sleeved with an inner protective shell in a threaded manner, and the inner protective shell is internally provided with a sensitive element. The device comprises an inner protective shell, the outer side of the inner protective shell is wrapped with an outer protective shell in a protective mode, a buffer reset mechanism is installed at the top of the outer protective shell, and an outer ring damping mechanism is installed in the buffer reset mechanism. The waterproof sealing performance, the impact resistance and pressure resistance and the signal transmission stability are remarkably improved, the problems that a traditional sensor is prone to leakage, signal distortion and connection looseness in extreme environments such as underwater explosion are effectively solved, and the sensor is suitable for complex application scenes such as wide temperature and high-frequency impact.

A seamless tank with excellent pressure resistance and a method for manufacturing the same are provided. The seamless tank of the present invention includes a cylindrical main body (10), a circumferential grounding portion (20b) connected to the lower end of the cylindrical main body, and a rising bottom (30) connected from the circumferential grounding portion toward the central axis. The surface area of ​​the outer surface of the rising bottom is defined as A. D The area of ​​the imaginary plane with the periphery as its outline is defined as A. B When, 1.55≥(A) D / A B The relationship is ≥1.40.

This utility model relates to the field of mold clearing strip technology, and discloses a high-temperature and pressure-resistant mold clearing strip, including a strip body, a heat-resistant layer on the side wall of the strip body, a base layer on the side wall of the heat-resistant layer, a pressure-resistant component inside the heat-resistant layer, and a splicing component on the side wall of the strip body; the pressure-resistant component includes a first fixed shell, a connecting block, and a first spring, a side wall of the fixed shell is fixedly connected to the inside of the heat-resistant layer, and the side wall of the connecting block is slidably connected to the inside of the first fixed shell. In this utility model, the two-stage buffer pressure-resistant component composed of the first fixed shell, the connecting block, and the first spring, and the second fixed shell, the connecting rod, and the second spring, enables the strip to absorb pressure layer by layer through the elastic deformation of the double springs when subjected to high mold pressure, thereby achieving the effect of dispersing high pressure and reducing local stress on the strip body, the heat-resistant layer, and the base layer. The above structure improves the pressure resistance stability and service life of the strip.

This invention relates to the field of force sensor technology, and more particularly to a pressure-balanced underwater six-dimensional force sensor sealing structure and method. It primarily addresses the problems of insufficient sealing pressure resistance and susceptibility to seawater leakage when existing six-dimensional force sensors are applied in underwater scenarios, and the fact that high underwater pressure can cause deformation of the main structure, interfering with strain measurement and leading to force signal deviation. The proposed technical solution includes a force sensor body, with a mounting plate installed at the output end of the force sensor body, and an elastic element disposed at and penetrated by the elastic element at the output end of the force sensor body; a sealing element disposed on the side of the force sensor body away from the elastic element, the sealing element being made of rigid or elastic material. The force sensor body, the elastic element, and the sealing element form a sealing structure that encloses the deformable beam and the PCB board. This invention can improve its underwater sealing pressure resistance and anti-interference capability, ensure force measurement accuracy, and assist underwater robots in precise operation.

The application discloses a kind of underground wall hat beam structure, it is related to underground diaphragm wall technical field, hat beam structure includes continuous wall main part and hat beam component, hat beam component includes first hat beam and second hat beam, first hat beam and second hat beam are located in the two sides of continuous wall main part.Support component includes first support, first connecting piece and second connecting piece, first connecting piece is located in the interior of first hat beam, second connecting piece is located in the interior of second hat beam, first support is located in the interior of continuous wall main part, and the both ends of first support are connected to first connecting piece and second connecting piece respectively.The hat beam component of the application can remain to serve as a part of underground wall, so that the integrity of underground wall is better, has better water stop and pressure resistance capacity.In addition, first hat beam and second hat beam are connected to underground wall main part by support component, so that first hat beam and second hat beam which need to be demolished can be used as formwork to pour continuous wall main part, reduce material waste.

The inspection and adjustment of the pressure sensor can be easily performed without adding a complicated mechanism. Therefore, in the liquid chromatograph, a first output value P1 of the pressure sensor (107) measured when a flow path is made in an open state to the atmosphere or a first chromatographic column (110) in which a packing is not filled is set in a chromatographic column setting portion (104) is obtained, a second output value P2 of the pressure sensor measured when a second chromatographic column (111) having a known pressure resistance Ps is set in the chromatographic column setting portion is obtained, and the gain of the pressure sensor is updated using the first output value P1 and the second output value P2.

The utility model discloses a self-adaptive structure of a valve sealing surface, which comprises a motor output shaft, a plane thrust ball bearing, a spring, a rotating shaft, a base plate, a valve moving plate, a valve fixed plate and a valve fixing seat, and an arc-shaped structure is arranged at the center of the rotating shaft; an output shaft of the motor is matched and connected with the rotating shaft; a plane thrust ball bearing, a spring and a rotating shaft are sequentially mounted on the motor output shaft from bottom to top; the rotating shaft is connected with the base plate and the valve moving plate in a matched mode. And the valve fixed plate is attached and fixed to the valve moving plate attaching surface through the valve fixing seat. The utility model discloses can carry out the self-adaptation to the two fitting plane of valve stator plate and valve rotor plate, guarantee two fitting plane complete fit, prevent liquid leakage, also have pressure resistance simultaneously, the pressure can reach 0.8 Mpa.

The present application provides a technology for improving the pressure resistance of an igniter assembly. The igniter assembly includes an igniter body having an ignition portion filled with a primer and a conductive portion extending from the ignition portion; an igniter collar having a cylindrical wall portion surrounding at least the conductive portion of the igniter body; and a resin molded body sandwiched between the igniter body and the igniter collar to integrate the igniter body and the igniter collar. The igniter collar has a first support portion provided at an inner circumferential portion of the wall portion and formed in a convex shape toward the radial inner side of the wall portion in a manner of being buried in the resin molded body, and a second support portion provided at a position in the inner circumferential portion further away from the ignition portion than the first support portion in the direction of the central axis of the wall portion and formed in a convex shape toward the radial inner side of the wall portion in a manner of being buried in the resin molded body, or formed in a concave shape toward the radial outer side of the wall portion in a manner of filling the resin molded body inside the second support portion.

This utility model discloses a wear-resistant rubber piston, relating to the field of hydraulic cylinder piston technology. It includes a first piston ring, with a second piston ring fixedly sleeved on the outer side of the first piston ring. An annular cavity is formed inside the first piston ring, and a wear-resistant mechanism is provided at the annular cavity. The wear-resistant mechanism includes a first elastic ring and a second elastic ring, with multiple springs and multiple buffer airbags spaced apart between them. The first piston ring compresses the first and second elastic rings, thereby buffering and absorbing external forces. The multiple springs connect the first and second elastic rings into a whole, improving the resistance to external forces. The multiple buffer airbags absorb the pressure on the first and second elastic rings, further enhancing the buffering and absorption of external forces, thus improving the overall pressure resistance and wear resistance of the rubber piston.

A self-priming pump body and a pressure resistance testing machine therefor. The self-priming pump body comprises a base, a drive electric motor being fixed on the base, a shell being fixed on the base, a drive cover being fixed on one side of the shell, a transmission rod being rotatably arranged in the drive cover, the output end of the drive electric motor being connected to an impeller in the shell by means of the transmission rod, a water inlet being fixed on one side of the shell, and a water outlet being fixed on the shell. The pressure resistance testing machine comprises a machine table, a material-conveying table being fixed on the machine table, two testing tables being fixed on one side of the material-conveying table, material conveying rollers being rotatably arranged in an array on the material-conveying table, two material discharge ports being provided on one side of the material-conveying table, a first cylinder being fixed on one end of each test table, and a circular plate being fixedly arranged at an output end of each first cylinder. In the present invention, the interior of a self-priming pump is tested by means of a first testing piece, which can simulate the impact of impurities in conveyed liquid on the interior of the self-priming pump body; and the exterior of the self-priming pump is tested by means of a second testing piece, which tests the compressive strength of the self-priming pump body, thereby achieving a high test accuracy.

The application relates to the technical field of heating plate performance detection, and discloses a heating plate device based on visual technology, a detection method thereof and a production process.The detection device comprises a monitoring head fixedly connected at the top of the detection device, a control center fixedly connected at the top of the detection device, a rotating drive assembly fixedly connected at the rear end inner wall of the detection device, the rotating drive assembly being provided as a driving motor, a rotating shaft fixedly connected at the front end output end of the rotating drive assembly, a first bevel gear fixedly connected at one end of the rotating shaft away from the rotating drive assembly, and second bevel gears meshingly connected on the left and right sides of the first bevel gear.The device has the advantages of improving the detection efficiency of the device, avoiding the damage of the heating plate caused by breakdown during the pressure resistance performance test of the heating plate, facilitating the subsequent exploration of the unqualified reasons of the heating plate, the timely improvement of the manufacturing process of the heating plate, the saving of resources, and the convenience for users, and the like.

The invention provides a resonance type compliant cavity composite structure pressure-resistant bending disc transducer which comprises a simply-supported ring, composite pressure-resistant assemblies are symmetrically arranged on the simply-supported ring up and down, the composite pressure-resistant assemblies and the simply-supported ring form an air cavity, and each composite pressure-resistant assembly comprises a watertight layer, a piezoelectric ceramic piece, a metal bending disc and a resonance type compliant pressure-resistant shell. The shell is arranged in the simply-supported ring, the metal bent disc is arranged above the shell, a medium cavity is formed between the shell and the metal bent disc, water permeable holes are formed in the side wall of the medium cavity, and the exterior of the transducer is communicated with the medium cavity. And a watertight layer covers the outer side. According to the composite shell structure, a pressure bearing structure and a driving structure are designed separately, pressure balance between driving force and a driving element is achieved through a coupling medium, and the anti-pressure capacity is improved; the shell is a bending vibration shell with the working frequency consistent with that of the transducer, the driving impedance is low, and the static pressure resistance is high.

The utility model provides a blade ring, a fastener and a high-pressure-resistant joint device, a pipeline connecting section and a fastener connecting section are arranged in the blade ring, and a connecting structure matched with the blade ring is arranged on the outer wall of the fastener. The joint device comprises a blade ring, a first fastener and a second fastener. The pipeline is fastened in a multi-stage mode through the connector device, under the condition that the pipeline and the connector device are both made of PEEK materials, the pressure resistance of the pipeline and the connector device can be larger than 80 Mpa and even reach 200 Mpa after the pipeline and the connector device are made of stainless steel or titanium materials, and the application requirements of ultra-high performance liquid chromatography and mass spectrometry can be met. Meanwhile, the fastening point positions of the pipeline to be fastened are distributed at all positions of the pipeline, so that stress point positions of the pipeline are dispersed, the stress concentration phenomenon of the pipeline is relieved, the stress borne by a single stress point of the pipeline is greatly reduced due to the dispersed stress point positions, and the situation that the pipeline is seriously deformed and blocked due to stress concentration is avoided.

According to the compression-resistant precision steel pipe, two positioning rings are symmetrically arranged in a steel pipe body, two butt-joint rings are symmetrically arranged at the two ends of the steel pipe body, butt-joint plates are arranged at the outer ends of the butt-joint rings, and the butt-joint rings can be inserted into the steel pipe body and make contact with the positioning rings; a plurality of grooves and reinforcing ribs are arranged on the outer wall of the steel pipe body, the reinforcing ribs are located in the grooves, a plurality of limiting holes are formed in the peripheral side of the butt joint plate, the two ends of each reinforcing rib can be inserted into the corresponding limiting hole, the steel pipe body is composed of an inner reinforcing layer and an outer toughness layer, the reinforcing layer made of alloy steel provides high-strength support, and the reinforcing ribs are made of steel. External pressure can be effectively resisted, and steel pipe deformation is prevented; the ductile layer made of low-carbon steel endows the steel pipe with good toughness, pressure impact can be buffered, brittle fracture is avoided, and the compressive property of the steel pipe is essentially improved through combination of the ductile layer and the steel pipe.

The invention discloses a pressure resistance and resistance detection device and method based on a plastic tray, and relates to the technical field of pressure resistance and resistance detection devices.The pressure resistance and resistance detection device comprises a detection sealing shell and the plastic tray, a supporting frame is arranged at the bottom of the detection sealing shell, and a temperature control box used for simulating a high-temperature storage environment is arranged on one side of the detection sealing shell; a pressure distribution mechanism is arranged at the upper end of the supporting frame. The supporting legs of the plastic tray are arranged at the upper end of the supporting plate, a weight is applied to the upper end of the supporting plate to simulate the stacking load, meanwhile, the temperature control box is used for regulating and detecting the internal temperature of the sealing shell, and high-fidelity reproduction of the real use working condition of the plastic tray in the high-temperature or low-temperature environment is achieved; load is transmitted to the supporting plate through the supporting legs and then acts on the inclined pulling plate, the inclined pulling plate is installed in the inclined groove in a sliding mode through the inclined sliding block and matched with the surface of the triangular block, and the uneven stress state under the non-ideal conditions such as uneven ground, supporting leg suspension or foreign matter interference is simulated.

The utility model relates to valve machining technical field, especially a new type valve cover. Including base, annular pipe, reinforcing surface, fixed ring and annular groove, the annular groove sets up in the base body center position, two fixed ring respectively set up on the base body, and two fixed ring respectively are close to base body both ends setting, the annular pipe sets up in the base upward operation surface. Including raw material detection, heating and material preparation, making embryo and forging, intermediate detection, trimming and shaping, cooling and cutting, welding and processing, final detection, cleaning and polishing, equipment maintenance, the utility model has the beneficial effect that: through the close connection of annular pipe and annular groove, the sealing performance of valve cover is promoted, effectively prevents medium leakage, through strict raw material detection and each link quality detection, can effectively improve the quality of valve cover, enhances its sealing property and pressure resistance, reduces the occurrence of product failure and leakage problem.

This utility model provides a pressure-resistant and flame-retardant PE hollow-wall spiral wound pipe, belonging to the technical field of hollow-wall spiral wound pipes. The pressure-resistant and flame-retardant PE hollow-wall spiral wound pipe provided by this utility model features a reinforcing tube with reinforcing ribs spirally wound on its outer circumference. Pressure-resistant filler is filled into the reinforcing ribs, improving the overall rigidity and pressure resistance of the spiral wound pipe, making it less prone to deformation and damage under external pressure. Simultaneously, a plastic spring is provided between the reinforcing tube and the spiral wound pipe body, providing internal support to the reinforcing tube and enhancing its ring stiffness and axial stiffness. Due to the plastic spring and the spirally wound reinforcing ribs on the outer circumference of the reinforcing tube, stress concentration is reduced, resulting in excellent bending resistance and preventing breakage of the spiral wound pipe. Furthermore, a flame-retardant and heat-insulating layer and a corrosion-resistant layer are provided on the outer circumference of the reinforcing tube, improving the flame retardancy and corrosion resistance of the spiral wound pipe.

The invention relates to the technical field of rotary compensators, in particular to a high-pressure-resistant rotary compensator for pipelines, which comprises an outer cylinder, a flange plate connected to the outer wall of the outer cylinder, an inner cylinder rotatably arranged on the inner side of the outer cylinder and a sealing flange slidably inserted at the upper end of the outer cylinder, and fixing mechanisms are arranged among the flange plate, the sealing flange and the outer cylinder. And an auxiliary supporting mechanism is arranged between the sealing flange and the inner cylinder. The rotary compensator is convenient to disassemble and assemble, the connection between the sealing flange of the rotary compensator and the flange on the outer cylinder does not need to be realized through the matching of a plurality of bolts and nuts, and the maintenance and the installation of the rotary compensator are convenient. After the rotary compensator is assembled and fixed, an additional support can be formed for the inner cylinder of the rotary compensator, the pressure resistance of the inner cylinder is better due to the two supports, and the pressure resistance of the inner cylinder is improved, so that the situation that the supporting stability between the inner cylinder and the outer cylinder is influenced due to the fact that pressure is concentrated at one supporting position for a long time in the past is avoided; and the normal use of the rotary compensator is prevented from being influenced.

A rubber sealing type pipeline leaking stoppage device comprises one or two fixing structures and a plugging pipe matched with the fixing structures, each fixing structure comprises a first half hoop and a second half hoop which are vertically matched to form full wrapping, the first half hoop and the second half hoop are consistent in structure, and the two ends of the first half hoop and the two ends of the second half hoop are connected through first fasteners. A sealing sleeve structure matched with the first half hoop and the second half hoop is arranged between the first half hoop and the second half hoop and arranged on the outer layer of the plugging pipe in a sleeving mode, multiple sets of pressing plates are symmetrically arranged on the two sides of the sealing sleeve structure, and the symmetrically-arranged pressing plates are connected through second fasteners. By the adoption of the structure, the modular split design is adopted, and the device adapts to complex trends of different pipe diameters and also adapts to a multi-pipeline parallel scene; multiple sealing guarantee is achieved, axial movement of the sealing sleeve is prevented, and radial movement between the sealing sleeve and the hoop is avoided; disassembly and assembly are quicker and more convenient, maintenance is convenient, pressure is evenly applied, compression resistance is stable, and practicability is high.

This utility model discloses a spring-loaded NTC temperature sensor for automotive coolant, relating to the field of sensor technology. It includes a brass housing, a connector plastic shell mounted on the top of the brass housing, a terminal mounted on the bottom of the connector plastic shell, a thermally conductive material injected into the inner wall of the bottom of the brass housing, an NTC thermistor connected inside the thermally conductive material, an encapsulation material covering the outer wall of the NTC thermistor, a connection between the top of the NTC thermistor and the bottom of the terminal, and a washer mounted on the top of the brass housing. In this utility model, the resistance leads, solder joints, and terminals are encapsulated to protect the strength of the resistance leads while meeting insulation, pressure resistance, moisture-proof, and waterproof requirements. The brass housing is very thin, and the bottom is filled with thermally conductive material, ensuring the sensor has a sensitive and fast response time, improving the safety and reliability of the coolant piping system.

The utility model relates to the technical field of blister boxes, in particular to a heat insulation blister box which comprises a lower box body, a connecting shaft is fixedly connected to the upper end of the rear side of the lower box body, an upper box body is rotatably connected to the upper end of the connecting shaft, rotating holes are symmetrically formed in the front end and the two sides of the rear side of the lower box body, and rotating shafts are rotatably connected to the interiors of the rotating holes. The front end of the rotating shaft is fixedly connected with a rotating handle, the inner side of the rotating shaft is fixedly connected with a supporting plate, the supporting plate is divided into an upper part and a lower part, the lower end of the upper half part of the supporting plate is symmetrically provided with sliding grooves, the upper end of the lower half part of the supporting plate is symmetrically and fixedly connected with sliding rods, the upper ends of the sliding rods are inserted and limited in the sliding grooves, and the outer sides of the sliding rods are sleeved with springs. The heat insulation blister box has the advantages that the internal temperature of the blister box can be kept through the filled heat insulation layer, and the pressure resistance of the blister box can be enhanced through the arranged supporting plate.

The invention belongs to the technical field of vacuum arc extinguish chambers, and discloses a shielding cylinder-porcelain shell assembly, a processing method thereof and a vacuum arc extinguish chamber, the shielding cylinder-porcelain shell assembly comprises a porcelain shell, a shielding cylinder and a fixing ring; an annular step is arranged on the inner wall of the porcelain shell; the upper end face of the annular step is a horizontal plane, and the lower end face of the annular step is an inclined plane. The shielding cylinder is arranged in the porcelain shell; wherein the outer wall of the shielding cylinder is provided with a cylinder body inclined surface, and the cylinder body inclined surface abuts against the lower end surface of the annular step; the fixing ring is arranged on the upper end face of the annular step and arranged on the outer side of the upper end opening of the shielding cylinder. Wherein one end of the fixing ring is welded and fixed with the upper port of the shielding cylinder, and the other end of the fixing ring abuts against the upper end face of the annular step; according to the invention, the fixed ring is welded with the upper port of the shielding cylinder, and the cylinder inclined surface of the shielding cylinder is abutted against the lower end surface of the annular step of the porcelain shell, so that reliable fixation of the shielding cylinder and the porcelain shell is realized, the pressure resistance of a product is ensured, and the manufacturing cost of the product is effectively reduced.

This invention relates to the field of drilling operation technology and discloses a stable deep-earth drilling system with strong pressure resistance. The system includes a support frame, a lifting frame slidably connected to the support frame, a top drive assembly mounted on the lifting frame, an intermediate docking assembly located at the bottom of the top drive assembly and connected sequentially, and a drilling assembly fixed to the bottom of the lowest intermediate docking assembly. The intermediate docking assembly includes a ring-shaped main body. This invention facilitates drilling operations and is suitable for drilling operations at different depths. During drilling, coolant is sprayed from the inner ring above the drill bit to quickly cool the drill bit, effectively protecting its safety and improving drilling efficiency and stability. It eliminates the need to remove the drill rod for core sampling, facilitating subsequent drilling operations. After core sampling, coolant flow is facilitated, preventing the core from clogging the backflowing coolant and effectively avoiding drill rod blockage in the borehole, thus improving drilling safety and facilitating drilling and core sampling operations.

This utility model belongs to the technical field of large tank production equipment, and discloses a temporary sealing device for a tank manhole, including a fixing frame and an arc-shaped sealing plate that can be fitted to the inner wall of the tank; at least two screws are hinged to the upper part of the arc-shaped sealing plate, and a sealing element is provided on its upper surface; the top of the screws passes through a pre-set through hole in the fixing frame and is connected to a nut; the width of the arc-shaped sealing plate is smaller than the length of the manhole, so that the arc-shaped sealing plate can be inserted into the tank through the manhole. Compared with the finished product door, this utility model has a simpler structure and lower cost. It can be disassembled and sealed from the inside of the tank, adopts a surface sealing structure, has good sealing performance and pressure resistance, and is easy to disassemble, which can meet the need for temporary sealing of the manhole during pressure holding tests.

The application discloses a heat exchanger and a manufacturing method thereof, and belongs to the technical field of heat exchange equipment. The heat exchanger comprises a cylindrical pressure-bearing shell and a heat exchange core body inside; the heat exchange core body is composed of a closed inner shell body and a plurality of parallel heat exchange units inside the inner shell body; each heat exchange unit is composed of two flat heat exchange plates and forms a first flow channel; the heat exchange plates are pressed with indentations and are fixedly connected through welding spots to form internal support columns; the outer side surface of the heat exchange plates is provided with a convex pattern; a filling cavity is formed between the inner shell body and the outer shell; and a pressure-resistant reinforcing structure is arranged in the filling cavity. The application realizes high pressure resistance (>=2.5MPa) through the convex pattern induced turbulence, the indentation welding spot, the inner shell body, the filling cavity reinforcing structure and the multilayer composite of the pressure-bearing shell; the filling medium layer can also isolate heat and reduce heat loss; and the application has the advantages of high heat exchange efficiency, strong pressure resistance and compact structure.

The invention relates to an under-pressure leaking stoppage method for gas leakage of a high-voltage switch flange gap. The under-pressure leaking stoppage method comprises the steps that the surface of a high-voltage switch leakage flange is polished and cleaned; the two sides of the leakage flange are each provided with at least one sealing piece, and the sealing pieces surround the outer circumferential face of the air chamber cylinder by one circle and are attached to the outer circumferential face in a gapless mode. An elastic sealing layer is wound on the peripheries of the leakage flange and the sealing piece; fastening pieces are installed, the elastic sealing layer and the sealing pieces are tightly fixed to the peripheral face of the air chamber cylinder of the switchgear, and the fastening pieces provide radial pressing force for the air chamber cylinder; and winding and curing the high-strength pressure-resistant layer. Through the composite design of sealing, elastic buffering, high-strength pressure resisting and pressing, reliable sealing under the high-pressure working condition is achieved.

This invention relates to the field of pressure resistance testing of water-jet loom parts, specifically to a pressure resistance testing device for ceramic plungers in water-jet looms. It includes a testing platform with a water tank on one side. A lifting frame that can slide vertically back and forth is located above the testing platform. A pressure testing head for applying axial pressure to the ceramic plunger is located in the middle of the lifting frame. High-speed cameras for capturing the entire deformation and fracture process of the ceramic plunger are symmetrically arranged on both sides of the pressure testing head. A pneumatic slide is located on the upper surface of the testing platform, and an electric clamp is located in the middle of the pneumatic slide. A transparent water bath tube is coaxially located above the electric clamp, and the clamping end of the electric clamp extends into the transparent water bath tube. The lifting frame also includes a rinsing and water replenishment mechanism, including a corrugated pipe connected to the water tank, a liquid storage box, and a sliding dropper. The liquid storage box stores a fluorescent penetrant. This device can simulate the actual working environment of the ceramic plunger, observe the microcrack propagation process in real time, and significantly improve the accuracy and reliability of the test results.

The present application relates to a kind of preparation methods of gypsum keel, the method is in the scheduling, monitoring of joint operation center with two production lines according to different technical routes to produce the gypsum keel of same quality.Solve the problem of the easy rust corrosion of light steel keel, steel plate rib web, the difficulty of marking bar, the insufficient strength, pressure resistance and impact resistance of column body in the spray construction type composite wall.

This utility model relates to the field of plunger pump technology, providing a springless valve body assembly for a reciprocating plunger pump, including a valve body and a valve core. The valve core consists of two sets of repulsive magnetic components and guide bolts, with the magnetic components slidably fitted onto the guide bolts. This springless design effectively reduces wear, significantly improving pump stability and service life. It also reduces installation and disassembly frequency, making it more convenient to use. The magnetic components are reusable, reducing maintenance costs and extending service life. The second magnetic component uses a planar assembly method with the valve plate, effectively reducing the risk of high-temperature deformation of the valve plate, thereby greatly improving sealing performance. Made of high-strength materials, it possesses excellent pressure resistance and corrosion resistance.