5367results about How to "Improve sealing" patented technology

The invention relates to a low-noise water purifier. The water purifier includes a shell, an integrated waterway plate and booster pumps. The integrated waterway plate is fixed to the shell and is connected to water outlets of the booster pumps through pressure stabilizing tanks. The pressure stabilizing tanks are disposed between the booster pumps and the integrated waterway plate. The integrated waterway plate is connected to a plurality of evenly arranged connection tubes and is connected to filter core base assemblies through the connection tubes in a one-one correspondence manner. Beneficial effects of the water purifier are that 1) water knocking abnormal sound of the water purifier is reduced, thus improving user experience, 2) the structure is simple, water leakage is prevented and the production efficiency is high, and 3) replacement of a consumable of the product is simpler and more convenient.

A natural gas filling device reliable in sealing is disclosed. The device is characterized in that the device comprises a liquid filling gun, a liquid receiving component matched with the liquid filling gun and used for filling a gas cylinder with liquid, and a gas returning component communicated with the gas outlet of the gas cylinder; the liquid filling gun is provided with a first outer shell, a first rotating fastener disposed in the first outer shell and connected to the first outer shell and the inner wall of which is provided with a symmetrical spiral groove, a first valve body between the first rotating fastener and the first shell, and a first valve core disposed in the first valve body and containing a liquid inlet and a liquid outlet; and the liquid receiving component is provided with a first shell, wherein the head of the first shell extends into the first rotating fastener and is in sealing match with the tail part of the first valve body, and the periphery of the first shell is provided with a first pivot pin engaged with the spiral groove in the first rotating fastener. The device is convenient in maintenance, replacement and operation of quick-wear parts and convenient to use. The device can be used for other low-temperature liquid media besides LNG and is simple in structure, low in cost, convenient in operation and reliable in sealing.

The invention relates to a gas nano purifier. The gas nano purifier comprises a mounting seat, the gas storage bin is installed on the installation base and used for storing clean gas, the side wall of the upper portion of the gas storage bin extends upwards to form an installation plate, and a gas path through hole is formed in the middle of the installation plate; the gas-water separator is mounted on the mounting plate and is used for carrying out primary purification on to-be-cleaned gas; the adsorption tower is mounted on the mounting plate and is used for carrying out secondary purification on the to-be-cleaned gas; gas to be cleaned sequentially flows through the gas-water separator and the adsorption tower and then enters the gas storage bin; the adsorption tower is communicated with the gas storage bin through an exhaust pipe; and the exhaust pipe penetrates through the gas path through hole. Through the arrangement, the installation operation is greatly simplified, and the integrity and the space utilization rate of equipment are improved.

The invention discloses an assembly type building stair mold, and relates to the technical field of stair molds, the assembly type building stair mold comprises a mold mechanism, the side face of the mold mechanism is provided with a transverse steel bar limiting mechanism, and the transverse steel bar limiting mechanism is used for limiting and fixing transverse steel bars in a prefabricated stair. According to the longitudinal reinforcement limiting mechanism, the height of a clamping head is accurately adjusted through a third mounting bolt, the clamping head can be flexibly selected according to the diameter of a longitudinal reinforcement, the mounting height and position of the longitudinal reinforcement can be accurately controlled, the overall positioning accuracy of a reinforcement framework is guaranteed, and then the mechanical property of the prefabricated stair is improved; the sleeve plays a role in protecting the end, inserted into the mold mechanism, of the third mounting bolt, it is avoided that concrete adhesion affects bolt disassembly, meanwhile, due to the detachable design of the third mounting bolt and the modular structure of the steel bar limiting mechanism, the demolding difficulty is lowered, damage to stairs after a component is formed is reduced, and the demolding efficiency and the finished product quality are improved.

The invention provides an electronic device, a ceramic substrate and a preparation method thereof, and relates to the technical field of semiconductors. The ceramic substrate comprises a ceramic base body and a liquid channel layer, the liquid channel layer is arranged in the ceramic base body, the liquid channel layer and the ceramic base body are integrally sintered and formed, the liquid channel layer comprises a liquid channel, the liquid channel is used for containing a cooling medium, and the liquid channel extends in the ceramic base body along a three-dimensional space path. The preparation method of the ceramic substrate comprises the following steps: preparing slurry containing ceramic powder, preparing a sacrificial template matched with a target liquid channel in shape, pouring the slurry to coat the sacrificial template, filling a mold with the slurry to obtain a ceramic blank, removing the sacrificial template to form a hollow channel in the ceramic blank, and sintering to form the ceramic substrate with the liquid channel. The electronic device comprises the ceramic substrate, a component and a liquid cooling circulation system.

The invention relates to the technical field of oil drilling and production well control equipment, in particular to a composite sealing rotary blowout preventer capable of regulating and controlling pressure while drilling. The blowout preventer comprises an execution module, a transmission module and a pressure sensing module. According to the execution module, radial extrusion force is applied to the rubber core through a radial shrinkage mechanism composed of a rotating ring, a connecting rod and a push block, meanwhile, a piston outer sleeve is matched with an inner shell in the axial direction under the limiting effect of an adaptive ring, axial compression force is applied to the rubber core, and therefore composite sealing of the rubber core is achieved. The transmission module drives a transmission gear to be meshed with a gear seat through a motor and drives a rotating ring to rotate, and power is transmitted to the radial contraction mechanism. The pressure sensing module is used for monitoring wellhead pressure in real time and actively triggering the generator to operate according to pressure changes, and self-adaptive adjustment of the sealing state is achieved. The device is suitable for the PCWD working condition, active sealing adjustment can be achieved based on wellhead pressure changes, the sealing reliability is improved in an axial and radial composite compression mode, and the device is particularly suitable for complex stratums, pressure fluctuation and continuous drilling scenes.

The utility model relates to a prefabricated middle partition wall structure of a tunnel ventilation inclined shaft. The prefabricated middle partition wall structure at least comprises a bottom supporting structure, a steel supporting assembly and a prefabricated modular wallboard. A positioning groove is formed in the top face of the bottom supporting structure, and the bottom of the steel supporting assembly is embedded into the positioning groove and fixed. The prefabricated modular wallboard is formed by splicing a plurality of prefabricated slabs, the adjacent prefabricated slabs are connected through tongue-and-groove structures which are matched in a concave-convex mode, and the tongue-and-groove joints are filled with sealing materials. The steel supporting assemblies are longitudinally arranged at intervals, and the tops of the steel supporting assemblies are fixed to a tunnel lining to form a steel-concrete combined structure for supporting the prefabricated modular wallboard. The steel supporting assembly and the prefabricated modular wall plate form a steel-concrete prefabricated structure, and the stability of the whole structure is enhanced. By adopting the autoclaved aerated concrete precast block material and the concave-convex groove embedded modular structure, the problems that the construction quality is difficult to control, the construction period is long, the on-way resistance of air flow is large and the like in the existing reinforced concrete mid-partition wall are solved.

The invention provides an intelligent transportation packaging box for composite materials, and relates to the technical field of packaging boxes, the intelligent transportation packaging box comprises an upper box, a lower box is arranged at the bottom end of the upper box, a limiting boss is fixedly mounted at the top end of the upper box, a limiting groove is formed in the bottom end of the lower box, and reinforcing ribs A and reinforcing ribs B are fixedly mounted on the surfaces of the upper box and the lower box; locking hasps are arranged at the positions, close to the centers, of the surfaces of the upper box and the lower box, and a handle is fixedly installed at the top end of the upper box. According to the packaging box, the upper box and the lower box can be attached more tightly through the sealing strip and the boss body, the sealing performance is improved, and the data acquisition system can monitor and record the transportation state of the packaging box in real time, record the transportation track and the transportation speed of the packaging box and record the opening time and the opening frequency of the packaging box; the internal temperature change of the packaging box and the vibration condition of the packaging box are recorded, practicability is high, and advancement is remarkable.

This utility model discloses a sealing fixture and battery testing system for illumination testing. It includes a first clamping block, a second clamping block, and a sealing structure. The first clamping block has an illumination testing channel communicating with a clamping area. This channel accommodates an external light source during battery testing, allowing the external light source to directly illuminate the glass substrate of the battery sample. In other words, this technical solution, on the one hand, eliminates the need for a quartz glass light-transmitting element in traditional structures by incorporating the battery sample with its glass substrate as part of the sealing fixture; on the other hand, the clamping area and sealing structure achieve reliable sealing of the battery sample. Furthermore, the illumination testing channel on the first clamping block allows external light to directly illuminate the surface of the battery glass substrate, significantly improving light utilization efficiency and transmittance, and avoiding light loss caused by quartz glass.

The application discloses a plastic solid waste recycling device and belongs to the technical field of plastic recycling. A fixed mold assembly is fixedly arranged on an equipment table. A movable mold assembly is movably arranged on the equipment table. A linkage member is movably arranged on the equipment table and is provided with a linkage plug on the side facing the movable mold assembly. An outer wall of the side of the fixed mold assembly facing the movable mold assembly is provided with an insertion block. The outer wall of the side of the insertion block facing the movable mold assembly is provided with a locking cavity. The movable mold assembly is axially provided with a penetrating insertion cavity. The insertion block is slidably arranged in the insertion cavity to realize preliminary locking. The linkage plug is slidably arranged in the locking cavity to realize relocking. The multistage locking structure is matched with the integrated sealing design. After the mold is closed, the locking is firm, the melt pressure in the injection molding process is effectively resisted, the problems of loosening and deviation of the mold are avoided, the sealing performance of the butt joint surface of the mold is greatly improved, the overflow and leakage phenomena are completely eliminated, the quality of the plastic product is ensured, and defects such as flash and uneven wall thickness are reduced.

This utility model relates to the field of intelligent grounding box technology, and discloses an easily sealed intelligent grounding box, including a box body. A rotatable door is rotatably connected to the front end of the box body. Several rainproof covers are fixedly connected to both ends of the box body. Exhaust grooves are formed on the inner walls of the rainproof covers at both ends of the box body. A loading frame is fixedly connected to the bottom end of the inner wall of the box body. A compression plate is connected to the top of the loading frame via a sealing assembly. A fan is installed at the rear end of the inner wall of the loading frame. A connecting cover is fixedly connected to the top of the box body. Cooling fans are connected to the left and right ends of the connecting cover via heat dissipation assemblies. This utility model achieves efficient sealing, significantly improves waterproofing, ensures the reliability and long-term stability of cable installation, and enables cold air circulation. Hot air is discharged from the exhaust grooves of the rainproof covers, significantly reducing the box body temperature and drying the damp inner cavity, ensuring stable equipment operation.

The invention discloses an electronic expansion valve and an air conditioning system, and relates to the technical field of electronic expansion valves.The electronic expansion valve comprises a first valve needle and a valve port assembly, the valve port assembly comprises a connecting base, a valve port ring and a pressing sleeve, the connecting base comprises a limiting part, a connecting part located below the limiting part and a hollow inner cavity, and the valve port ring is arranged in the inner cavity; the valve port ring is arranged in the inner cavity and abuts against the limiting part, the pressing sleeve is connected with the connecting part, the valve port ring and the limiting part axially press the valve port ring, the valve port ring is provided with a valve port communicated with the inner cavity, the first valve needle is movably arranged on the connecting base, and the second valve needle is movably arranged on the connecting base. And a flow path through which the connecting seat is communicated with the valve port is opened and closed. The technical scheme provided by the invention aims to solve the problems of separation and internal leakage of the sealing ring caused by insufficient limiting of the sealing ring by a valve port piece under the condition of a large-diameter valve port of the electronic expansion valve.

This utility model discloses a mechanical explosion-proof thermostat, belonging to the technical field of thermostats. The device includes an explosion-proof body and a cover plate. The explosion-proof body includes an insulating shell, and an actuation control component is disposed inside the insulating shell. The inner edge of the insulating shell is threaded. The bottom of the cover plate is provided with a threaded retaining ring that mates with the threaded inner edge of the insulating shell. An inner ring plate is disposed along the inner edge of the insulating shell, and a sealing gap exists between the inner ring plate and the inner edge of the insulating shell. Multiple sealing gaskets are fixedly disposed on one side of the inner ring plate within the sealing gap. When the cover plate is screwed into the insulating shell, the threaded retaining ring embeds into the sealing gap and mates with multiple sets of annular protrusions on the outer side of the multiple sealing gaskets fixed on the inner ring plate. The multiple sets of annular protrusions elastically press against the inner side of the threaded retaining ring, forming a multi-stage sealing effect, thereby improving the stability of the sealing effect at the cover plate, effectively resisting the intrusion of external corrosive substances, and extending the service life of the thermostat.

This invention discloses a grouting and sealing device for fault water hazard prevention, relating to the field of underground grouting and sealing technology in coal mines. It includes a grouting component body with a feed pipe fixedly installed on its inner surface. The grouting component body is equipped with at least two sealing mechanisms. Through the arrangement of these sealing mechanisms, when encountering a gourd-shaped borehole, the segmented arrangement of the first and second expansion capsules allows the external air supply end to inflate the first expansion capsule. With the cooperation of the connecting and limiting components, the first and second expansion capsules are positioned in the larger and smaller diameter areas of the gourd shape, respectively. This allows the first and second expansion capsules to expand to appropriate sizes after expansion, respectively, to cooperate with different areas during sealing. This avoids poor contact with the gourd-shaped borehole wall during sealing, increases the sealing contact area with the borehole wall, and ensures the sealing effect during grouting and sealing.

The utility model relates to metallurgical waste heat boiler technical field and disclose a kind of high-temperature ash slag removal and temporary storage device suitable for metallurgical waste heat boiler, it include: ash chute, the ash chute includes hopper body, several access doors and several spring supports, the access door is set in hopper body side wall;Floor ash bin, including ash bin body, steel flue interface and sealing door, the steel flue interface is set at the top of sealing door, the hopper body is connected with ash bin body by just flue interface, the sealing door is set in the side wall of ash bin body;Control assembly, it is jointly arranged in the inside of ash chute and floor ash bin.This scheme uses ash chute to collect high-temperature ash slag, enters floor ash bin by high-power electric hoist driving double flap valve control ash slag, realizes closed discharge, is linked and is controlled by flap valve and sealing door, effectively isolates high-temperature area before dust removal, guarantees operator and equipment safety, improves operating stability and environmental protection.

The invention discloses a strip-shaped sealing structure, a strip-shaped sealing method and application of the strip-shaped sealing structure and the strip-shaped sealing method in a storage roadway. The structure comprises a sealing device main body (1), a convex pressing strip (2) and a concave pressing strip (3), wherein the sealing device main body (1) is clamped between the convex pressing strip (2) and the concave pressing strip (3); the convex pressing strip (2) is provided with a first boss (21) and a first groove (22), and the concave pressing strip (3) is provided with a second boss (31) and a second groove (32). The method comprises the steps that the sealing device body (1) is in a strip shape through diagonal pulling and merging, the convex pressing strip (2) and the concave pressing strip (3) are symmetrically pressed, the first boss (21) is embedded into the second groove (32), the second boss (31) is embedded into the first groove (22), and the sealing device body (1) forms a folded labyrinth type sealing path. The sealing structure is suitable for sealing an inlet and / or an outlet of a stereoscopic warehouse roadway, a clean room channel or a special article warehouse roadway.

The utility model relates to the technical field of engine oil pan, especially a leakage-proof structure of in-line piston engine, an engine and an aircraft, including setting in the oil pan of engine crankcase body subassembly lower part, the oil pan forms a basin -like structure of one inner bottom surface basically level, the inner bottom surface of oil pan is concave downward and forms the oil storage groove that the structure is further outward protruding relative to the outer bottom surface of oil pan, the outer bottom surface of oil pan and the outside wall between oil storage groove smooth transition, the sealing edge contact surface of oil pan and engine crankcase body subassembly connection is wide side design, and is installed on the sealing edge contact surface with wide -side sealing pad, and the width of wide -side sealing pad is greater than the width of sealing edge contact surface, the utility model simplifies the structure, makes can adapt to the large inclination angle of aircraft ±45 DEG movement, greatly reduces the oil leakage risk simultaneously.

The utility model discloses a kind of dustproof water pumps of shell, comprising: pump shell, dustproof component;Pump shell includes the front shell and rear shell of its front and rear end.The utility model said a kind of dustproof water pumps of shell, the rear shell of pump shell rear end is equipped with sealing cylinder between rear shell and drive shaft, can pass its inside and outside multiple groups of first sealing ring and second sealing ring, multiple layers of sealing and the connection between rear shell and drive shaft, to improve the sealing property of rear shell rear end, simultaneously, inside and outside compression inside sealing pad and outer sealing pad between front shell and rear shell, double-layer sealing between the front shell and rear shell on pump shell can also be carried out, and then pass multiple sealing structures between pump shell shell and drive shaft, to effectively block dust from outside into pump shell, and the first sealing ring and second sealing ring of inside and outside of sealing cylinder between rear shell and drive shaft, and inside sealing pad and outer sealing pad between front shell and rear shell, can be conveniently disassembled and adjusted.

Polypropylene-based multilayer film, which is biaxially oriented, process for manufacturing biaxially oriented multilayer film and its use in flexible packaging.

The application relates to the technical field of vehicle bodies, and provides a back door and a vehicle. The back door provided by the application comprises a back door sheet metal assembly, a back door window frame surrounding a light transmission hole formed by the back door sheet metal assembly, and a sealing piece arranged on the back door window frame. The sealing piece has a first sealing part located on the outer side wall of the back door window frame, the first sealing part is arranged around the back door window frame, and the first sealing part can seal the gap between the back door window frame and the counter handle. The back door provided by the application can seal the gap between the back door window frame and the counter handle, can better improve the sealing quality of the back door in the vehicle, can reduce the noise entering the vehicle from the back door, and can improve the quality of the vehicle.

This utility model discloses an easy-to-install plastic elbow, relating to the field of pipe connection technology. It includes an elbow body and a water pipe body. Limiting blocks are installed at both ends of the elbow body, and a sealing strip is fitted onto the outer wall of each limiting block. A positioning block is installed at one end of the sealing strip. The water pipe body is fitted onto the inner wall of the limiting block, and a connecting block is installed onto the outer wall of the water pipe body. A cavity is provided between the connecting block and the water pipe body, and the limiting block is fitted within the cavity. This utility model, through the setting of limiting blocks at both ends of the elbow body, and the sealing strip fitted onto the outer wall of the limiting block, effectively improves the stability and sealing of the connection between the elbow body and the water pipe body, increasing installation efficiency. The contact block effectively limits the position of the connecting block.

The utility model relates to the technical field of pipeline connection anti-leakage, in particular to an anti-leakage device of a heating, ventilation and fire fighting system, which comprises two pipelines, flanges are arranged on the pipelines, the two flanges are connected through a first bolt, a groove is arranged at the end of each pipeline, a first sealing ring is arranged in each groove, and sealing covers are sleeved outside the two flanges. A jacking mechanism is arranged on the sealing cover; the jacking and pressing mechanism is used for jacking and pressing the two flanges and pressing the first sealing ring between the two flanges. Through cooperation of the sealing cover and the jacking mechanism, extra pressure can be applied to the two flanges, the first sealing ring is further pressed, the sealing effect is enhanced, and the anti-leakage performance of the connecting position is remarkably improved; the structure is simple, installation can be achieved without complex operation, the problem of leakage caused by aging of a sealing piece and loosening of a connecting piece in traditional pipeline connection is solved, resource waste can be reduced, the equipment damage probability can be lowered, and stable operation of a heating, ventilation and fire fighting system is guaranteed.

The utility model relates to noise isolation device technical field, concretely relates to noise isolation and noise reduction protection integrated device, including a plurality of mutual splicing's protective plate, and the protective plate is composed of the outer frame board of setting at the outside and the sound insulation layer of setting at the central position department of outer frame board, and the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the sound insulation layer and the outer frame board, the sound absorption layer is arranged between the

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The utility model relates to steel support technical field, and disclose a detachable combined steel support for tunnel construction, including support plate mechanism, still include: support mechanism and pressure regulating mechanism, the bottom of support plate mechanism and the top of pressure regulating mechanism swing joint, the bottom of pressure regulating mechanism and the top of support mechanism fixed connection, the utility model discloses through the support plate mechanism top close -fit in tunnel top, and make adjacent support plate main body splice together, place support mechanism in suitable position, and make splicing post align splicing seat, rotate threaded shaft and drive telescopic column along the inner wall of stand to move upwards through thread, make splicing post insert splicing seat inside, the top board is immobile, telescopic column continues to push base to move upwards, make pressure spring contract, and make pressure spring contract certain distance, produce constant pressure to the top board to the utility model discloses, thereby make support plate mechanism to the pressure of tunnel top in fixed value support, be favorable to the security of steel support.

The application discloses a high-temperature and high-pressure combustion chamber spectrum characteristic transmission device based on a special optical fiber probe head, which comprises an optical fiber probe head, a light guide optical fiber, a light emitting characteristic analysis device and a cooling liquid pump; the optical fiber probe head comprises high-transmittance optical glass, a metal cooling sleeve and an optical flange; the high-transmittance optical glass can transmit ultraviolet-visible light with a wavelength of 100-760 nm; the metal cooling sleeve comprises a cylindrical sleeve and a connecting cap; the cylindrical sleeve is coaxially arranged on the outer periphery of the high-transmittance optical glass and is sealingly arranged in a probe head mounting hole; the light guide optical fiber can collect the ultraviolet-visible light transmitted through the high-transmittance optical glass and is connected with the light emitting characteristic analysis device; and the cylindrical sleeve and the connecting cap are both provided with cooling channels connected with the cooling liquid pump. The application can analyze the chemical reaction light emitting characteristics in the high-temperature and high-pressure combustion chamber in real time, is especially suitable for monitoring the spontaneous radiation characteristics of OH*, CH* and C2* groups generated in the combustion process, and thus can determine the reaction region and the reaction heat release.

The utility model relates to a novel closed sputum suction tube, including the pipe main body, is equipped with breathing machine interface, tracheal catheter interface, sputum suction tube spare interface and bronchofibroscope entrance on the pipe main body, sputum suction tube spare interface connects sputum suction tube subassembly, tracheal catheter interface with bronchofibroscope entrance coaxial arrangement, tracheal catheter interface with bronchofibroscope entrance is separately arranged in the axial both ends of pipe main body, is equipped with the closure cover that can open and close on bronchofibroscope entrance, breathing machine interface with sputum suction tube spare interface is along the circumferential arrangement of pipe main body and both are located between tracheal catheter interface with bronchofibroscope entrance. Adopt the technical scheme of the utility model, tracheal catheter interface with bronchofibroscope entrance is separately arranged in the axial both ends of pipe main body, and both are on the same straight line, and the wear of bronchofibroscope is small, and the operation is convenient, when needing to carry out bronchofibroscope examination, opens the closure cover and can carry out the operation, and it has the advantage that the operation is simple.

The utility model provides a kind of buckle structure, including upper cover, lower shell and silica gel sleeve, lower shell is placed in silica gel sleeve, and annular sealing ring is set in the silica gel sleeve of lower shell upper end, and the lower end of upper cover is provided with elastic vertical beam along annular interval, and elastic vertical beam is placed in lower shell, and with the inside sealing of annular sealing ring, elastic vertical beam is spaced apart from the inner wall of lower shell, and the interval is stress release cavity, the outside of part elastic vertical beam is provided with clasp, and lower shell is provided with the clamping groove matched with clasp.The utility model is fast in assembly rate, not easy to loosen under vibration environment, easy to disassemble, and repeated disassembly is not easy to cause sealing surface wear.