94results about How to "Guaranteed sealing reliability" patented technology

The utility model relates to cable connection protection technical field discloses a sheath pipe structure for two cable joints, including upper casing, the outer wall fixed connection of upper casing has the connecting barrel, the inner wall rotationally connected with press column of connecting barrel, the lower surface fixed connection of press column has rotary column, the inside fixed connection of rotary column has the card post, the outer wall sliding connection of card post has the limit block, the outer wall fixed connection of limit block has lower casing, the inner wall fixed connection of connecting barrel has the limit piece, the outer wall sliding connection of rotary column has the spring. In the utility model, through the mutual cooperation between upper casing, connecting barrel, press column, rotary column, card post, limit block, limit piece, spring and lower casing, can greatly promote installation and maintenance efficiency, significantly reduce construction time and manpower cost, can simplify operation procedure simultaneously, reduce the dependence on professional tool and complex skill, reduce installation error risk.

This utility model relates to the technical field of engineering construction, and in particular to a drainage channel structure for expansion joints. It includes: an inter-column drainage channel, disposed between adjacent structural columns, with an inter-column connecting plate; clearance grooves are provided on the sides of adjacent structural columns; the inter-column connecting plate is fixedly connected to a structural beam and embedded in the clearance groove; a first inter-beam drainage channel and a second inter-beam drainage channel are respectively disposed at both ends of the inter-column drainage channel, both disposed between adjacent structural beams; each inter-beam drainage channel has a beam bottom connecting plate, fixedly connected to the bottom of the structural beam; the first inter-beam drainage channel, the inter-column drainage channel, and the second inter-beam drainage channel overlap sequentially to form a slope and are interconnected; an expansion joint waterproofing strip is provided between the beam bottom connecting plate and the bottom of the structural beam. This application has the effect of forming a second line of defense against water seepage in expansion joints, preventing indoor water seepage.

The present application relates to a heat management system and a battery, comprising a heat exchange assembly and a turbulence assembly, the heat exchange assembly comprising heat exchange components, a plurality of heat exchange flow channels are formed on the heat exchange components, the plurality of heat exchange flow channels are sequentially arranged along a first direction, and the heat exchange flow channels are used to arrange heat exchange medium; the turbulence assembly is arranged in the heat exchange flow channels, the turbulence assembly comprises a plurality of turbulence components, and the plurality of turbulence components are sequentially arranged along a second direction; at least one turbulence unit is arranged on each turbulence component; when the same turbulence component is provided with a plurality of turbulence units, the plurality of turbulence units are sequentially arranged along the first direction, and each turbulence unit is arranged in different heat exchange flow channels; at least one turbulence hole is arranged on each turbulence unit, and when the same turbulence unit is provided with a plurality of turbulence holes, the plurality of turbulence holes are sequentially arranged along the first direction. The present application changes the flow direction and state of the heat exchange medium by arranging the turbulence assembly, improves the efficiency of convective heat exchange, and meets the uniform temperature requirement.

The present application relates to the technical field of pipeline plugging, and provides a pipeline plugging robot, the open end of a first mounting cylinder is inserted along the axial direction of the open end of a second mounting cylinder, and the open end of the second mounting cylinder is simultaneously inserted into a preset slot of the first mounting cylinder as the insertion action advances, forming a nested structure in which the second mounting cylinder wraps the open end of the first mounting cylinder; at this time, the outer wall of the first mounting cylinder is tightly attached to the inner wall of the second mounting cylinder; the inner wall of the extrusion sleeve is tightly attached to the outer wall of the second mounting cylinder, further sealingly constraining the outer periphery of the second mounting cylinder, and preventing the medium inside the pipeline from entering the first mounting cylinder and the second mounting cylinder. During the rotation of the anchoring motor, the slips are driven to move along the radial direction of the second mounting cylinder through the first transmission assembly, and the slips can pass through the channel one by one during the movement, and drive the closure plate to realize reinforced sealing of the channel.

The utility model discloses a valve assembly and air conditioner with it, valve assembly includes: valve island, the first flow passage is formed in the valve island, and the valve island has the opening in communication with the first flow passage, functional component, functional component is detachably arranged at the opening, and the sealing ring is arranged between functional component and the valve island, one of valve island and functional component has the convex part, and the other of valve island and functional component is in contact with the convex part, and the convex part is annular along the circumferential direction of the opening. According to the valve assembly of the utility model, through the sealing ring between functional component and the valve island, one of valve island and functional component has the convex part, the other of valve island and functional component is in contact with the convex part, and the convex part is annular along the circumferential direction of the opening, can guarantee the sealing reliability between functional component and the valve island through double sealing, avoid valve assembly leakage, guarantee the reliability and stability of valve assembly, reduce the maintenance frequency of valve assembly, prolong the service life of valve assembly.

The application discloses a transformer for extra-high voltage direct current transmission engineering and relates to the technical field of transformers, in particular to a transformer for extra-high voltage direct current transmission engineering. The transformer comprises a transformer body, an oil tank arranged in the transformer body, a drain valve pipe communicated with the oil tank and mounted on one side of the transformer body, a main flow guide pipe connected with one end of the drain valve pipe, and a drain valve component and a sampling mechanism arranged at two ends of the main flow guide pipe. The transformer for extra-high voltage direct current transmission engineering is provided with the sampling mechanism. When sampling, the sampling pipe body is automatically moved up to the main flow guide pipe in an arc-shaped notch opened by itself and covered by a composite sealing ring under the transmission of the lifting transmission assembly, and then the clean oil sample in the main flow guide pipe enters the inside of the sampling pipe body along the cylinder wall of the sampling pipe body in a wall layer flow, so that air is avoided from being sucked by free jet flow. In the oil inlet process, the oil pressure pushes the piston rod in the buffer assembly to move down synchronously, and the gas in the sampling pipe body is discharged through the associated second electromagnetic valve pipe, so that the detection requirement of low-bubble sampling is met.

The invention relates to the technical field of fluid conveying, and discloses a double-channel fluid connecting device which is characterized in that a fixing part is provided with a first pipeline and a second pipeline; the first pipeline is provided with a first butt joint opening, the second pipeline is provided with a second butt joint opening, and the second butt joint opening is coaxially arranged in the first butt joint opening in a sleeved mode. A first annular channel is formed between the second butt joint port and the first butt joint port; the movable part is provided with a third pipeline and a fourth pipeline; the third pipeline is provided with a third butt joint port, the fourth pipeline is provided with a fourth butt joint port, and the fourth butt joint port is coaxially sleeved with the third butt joint port; a second annular channel is formed between the fourth butt joint port and the third butt joint port; one path of fluid is transmitted through the second pipeline, the second butt-joint opening and the fourth butt-joint opening; and the other path of fluid is conveyed through the first pipeline, the first annular channel, the second annular channel and the third pipeline. Rapid butt joint of two paths of fluid is achieved, the two paths of butt joint faces are coaxially designed, and the butt joint precision requirement is lowered.

This application relates to the field of carding technology, specifically to a carding device for cotton sliver processing. The device includes a housing, with a needle roller, a stripping roller, and an output roller arranged inside the housing. The stripping roller and output roller are located on the left and right sides of the needle roller, respectively. A circulating belt is located on the upper part of the inner side of the housing, above the needle roller. A base is fixedly connected to the bottom of the inner side of the housing, below the needle roller, stripping roller, and output roller. A self-clogging mechanism for impurity removal is installed on the base. This invention uses a vacuum pump to generate negative pressure, which can efficiently remove impurities and short fibers generated during the carding process. An electric push rod controls the raising and lowering of the plug, achieving sealing of the dust collection cavity and rapid slag removal. Furthermore, the design of the guide sleeve and guide rod ensures the smoothness of the plug's movement and the reliability of the seal, preventing gas backflow after sealing and preventing the backflowing air from re-adhering impurities to the cotton sliver.

The invention relates to a shock tube detonation test visualization device and a test method thereof, and the device comprises a shock tube which is sequentially divided into a premixing section, a detonation section, a development section and a measurement section along the axial direction, and the measurement section is provided with a plurality of optical visualization windows; the gas distribution ignition system is used for filling combustible premixed gas into the shock tube and generating a controllable ignition source at the detonation section; the synchronous signal acquisition system is used for acquiring a flame front position signal in the shock tube in real time; the schlieren system is used for acquiring a two-dimensional transient density gradient field of the shock wave and the flame front; the laser-induced fluorescence system is used for carrying out two-dimensional plane laser-induced fluorescence imaging on the flame reaction area; the high-speed photographing system is used for recording the overall propagation process of the flame in the shock tube; and the smoke grain acquisition unit is used for forming a smoke film on the inner wall of the measurement section to capture and retain the detonation cell structure. Compared with the prior art, the detonation wave three-dimensional structure and array surface change characteristics can be captured and observed at the same time through one detonation test.

This utility model discloses a quick-change gripper main plate, including a quick-change plate and a working plate. Both the quick-change plate and the working plate have several evenly arranged air channels inside. Connecting air nozzles communicating with the air channels are fixedly connected to the outer walls of both the quick-change plate and the working plate. A mounting block for docking with a robot is fixedly connected to the surface of the quick-change plate. A hanging plate is fixedly connected to the inner wall of the quick-change plate, and several evenly arranged steel balls are movably connected to the side wall of the hanging plate. A piston sleeve is movably connected to the inner wall of the quick-change plate, and a piston rod is engaged with the inner wall of the piston sleeve. This utility model achieves quick gripper replacement through a gas-driven piston and steel ball engagement structure, eliminating the need for complex tools and significantly improving the gripper replacement efficiency of industrial robots. Furthermore, the self-locking steel balls prevent the gripper from falling off in case of abnormal air pressure, combining advantages such as high efficiency, reliability, safety, and flexibility.

This specification discloses a heat dissipation system for an unmanned aerial vehicle (UAV), including a heat dissipation frame, an air duct cover, a cooling fan, and a dust filter. The heat dissipation frame is made of metal and includes a heat dissipation air duct body (with a first heat dissipation fin on its inner wall, overlapping the position of the air duct cover) and an outer mounting platform. The top is sealed by a first sealing gasket, and the bottom by a second sealing gasket, forming a sealed cavity. An air inlet is located at the front end of the heat dissipation air duct body, protected from water seepage by the sealing gasket. The air duct cover is fixed to the top of the frame by the sealing gasket, with a thermally conductive contact surface on its upper surface and a second heat dissipation fin on its lower surface, forming a heat dissipation path with the first heat dissipation fin. A dust filter is installed at the rear exhaust port of the heat dissipation frame, and the cooling fan is fixed to the air inlet, driving cool air to exchange heat through the two heat dissipation fins before exhausting it from the exhaust port.

The application discloses a pre-buried adjustable expansion depth expansion bolt assembly and belongs to the technical field of expansion bolts, which comprises a spring pad, a flat pad, a pre-buried sleeve, a hexagonal nut, an expansion sleeve, an expansion cone, an adjusting screw rod and a sealing end cover. In order to overcome the defects of the prior art, such as the damage to the concrete structure and the internal steel bars caused by the post-construction of the expansion bolt, the fixed and unadjustable expansion depth of the pre-buried anchor bolt, the jamming of the adjusting mechanism caused by the cement seepage due to the unreliable sealing of the plastic film during the pouring process, and the loosening of the anchoring force under long-term vibration, the application provides the pre-buried adjustable expansion depth expansion bolt assembly, so that the expansion depth of the expansion bolt on the market can be flexibly adjusted according to the actual wall thickness or the size of the decorative layer under the premise of pre-buried installation, the problems of the poor stability of the sealing end cover during the pouring process, the cement leakage caused by the poor stability of the sealing end cover, the single anchoring force between the expansion sleeve and the concrete and the insufficient long-term reliability of the expansion sleeve and the concrete are solved.

The pipe joint comprises an upper portion, a middle portion and a lower portion, and the upper portion, the middle portion and the lower portion jointly form a through circulation channel. An annular insertion block is arranged on the top face of the upper portion, a circle of platform is arranged on the periphery of the annular insertion block, a sunken solder groove is formed in the side, close to the annular insertion block, of the surface of the platform, and dual positioning of the annular insertion block and the platform facilitates reduction of welding alignment errors. A plurality of through screw holes are formed in the lower part; the outer diameter of the cylindrical structure where the first vertical face is located is larger than the outer diameter of the middle portion and smaller than the outer diameter of the lower portion, the middle portion is concave inwards relative to the upper portion and the lower portion, and the concave structure of the middle portion serves as a thermal expansion buffer area and is matched with smooth transition of the first inclined face, so that the welding thermal stress concentration coefficient can be effectively reduced, thermal deformation is reduced, and the welding seam cracking rate is reduced. According to the pipe joint for the plate heat exchanger, through the stepped axial structure, a multi-stage positioning reference and stress dispersion system is formed, and the comprehensive performance of the pipe joint can be remarkably improved.

This utility model relates to a novel diaphragm solenoid valve for an inkjet printer, comprising a valve body, valve cores on both the left and right sides of the valve body, and control components for controlling the left and right movement of the valve cores. An ink outlet channel extending through one side of the outer wall is provided in the middle of the valve body. Ink inlet channels extending through the outer wall are provided on both the left and right sides of the ink outlet channel. An ink inlet port is provided between the ink inlet channel and the ink outlet channel. A valve core movable cavity is provided at both the left and right ends of the valve body. A plug port communicating with the valve core movable cavity is provided on the opposite side of the ink inlet port in the ink inlet channel. One end of the valve core is movably fitted within the valve core movable cavity. The valve core includes a valve core abutment that passes through the plug port and enters the ink inlet channel. The valve core abutment is used to seal the ink inlet port under the control of the control components. A sealing mechanism is provided between the valve core abutment and the plug port. This application, by optimizing the valve body structure, shortens the ink flow path length inside the solenoid valve and reduces the ink retention volume.

The utility model belongs to tool fixture technical field, concretely relates to a device of quick clamping and sealing furnace cover of heat preservation furnace, including counterforce frame, bolt and dog claw, one end of dog claw is fixed on counterforce frame, the other end is provided with claw hook, the screw hole on counterforce frame is screwed with bolt, and the bolt is used for supporting counterforce frame outward with fulcrum of small furnace cover top as support, and the claw hook of dog claw is hooked on the convex point of big furnace cover, clamps small furnace cover and big furnace cover, the utility model provides quick clamping and sealing device of heat preservation furnace cover, and the efficiency and sealing reliability of furnace cover installation are improved obviously through the innovative structure design, the defect that the original inclined wedge type clamping device is effectively overcome cumbersome, time -consuming, easy to loosen and leak, realizes the quick, disposable reliable clamping and sealing of heat preservation furnace cover, obviously improves work efficiency, and ensures the sealing reliability in the operation process of heat preservation furnace.

The utility model discloses a gate valve structure relates to gate valve technical field. Including the valve cover, the valve cover inside is provided with the valve plate, and the valve plate is in the valve cover and goes up and down and lifts to carry out valve opening and closing action, and the valve plate top is provided with valve drive shaft, and the valve drive shaft includes the fixed screw rod of valve plate connection and is used for with screw rod screw joint cooperation realizes the sleeve shaft for valve plate lifting, and the sleeve shaft place is fixed with the outer plastic pipe, and the screw rod place is fixed with the inner plastic pipe. The utility model discloses through the structure setting of inner plastic pipe and outer plastic pipe etc.

The utility model belongs to the field of valves, and particularly relates to a proportional pressure reducing valve. The utility model provides a proportional pressure reducing valve which is reliable to use. The throttling valve comprises a valve body and a valve element, a valve cavity is formed in the valve body, an inlet is formed in the lower portion of the valve body, an outlet is formed in the upper portion of the valve body, and the inlet and the outlet are both communicated with the valve cavity, and is characterized in that a throttling section is arranged between the inlet and the outlet in the valve cavity, and a throttling sleeve assembly is arranged in the throttling section and comprises a plurality of throttling sleeve bodies which are connected in series up and down; an opening groove is formed in the lower side in the throttling sleeve body, a throttling hole is formed in the upper side in the throttling sleeve body, and the diameter of the throttling hole is smaller than that of the opening groove; the valve rod is provided with a throttling body corresponding to each throttling sleeve body, and each throttling body comprises a conical section and a throttling column section; and the conical section corresponds to the open slot of the throttling sleeve body.

The embodiment of the application provides a battery baking device and a baking method thereof, and relates to the technical field of battery manufacturing. The device is used for the coordinated drying of a battery in multiple physical fields. A generator is connected in parallel to an oven, a vacuum pump is connected in series to the oven, a valve assembly is used for switching the working states of the vacuum pump and the generator, and a heating plate is arranged in the oven and is in contact with the battery for heat conduction. The battery baking device and the baking method thereof can efficiently drive the desorption and migration of strongly adsorbed moisture in the battery, and improve the drying depth and time economy of the baking process.

The application discloses a servo cut-off valve group, which comprises a first valve body and a second valve body integrated on a valve seat. Both the valve bodies are provided with valve cavities, and the valve cavities are internally provided with valve spools driven by a servo motor through a screw rod. The valve bodies are provided with outer ring channels communicated with inlet and outlet of the valve seat on the side surfaces, the outer ring channels are communicated with the valve cavities through a plurality of uniformly distributed lateral flow channels, and the inner walls of the valve cavities are further provided with inner ring channels. The longitudinal flow channels at the bottoms of the two valve cavities are communicated with each other through channels in the valve seat. When the two valve spools synchronously rise above the lateral flow channels, fluid can sequentially pass through the flow channels, and the valve is opened; when the two valve spools synchronously descend to completely cover the lateral flow channels, the valve is closed. The two valve cavities are communicated at the bottoms to form a pressure balance cavity, so that the valve spools are hardly subjected to axial thrust when the valve is closed, and high pressure is converted into sealing force in the radial direction of the valve spools, thereby fundamentally solving the high pressure leakage problem of traditional cut-off valves, and the application is especially suitable for high pressure equipment such as filter presses.

The utility model belongs to the field of packaging bags, particularly relates to an anti-pressure structure and an anti-pressure packaging bag, and provides the following scheme aiming at the problems that an existing traditional packaging bag generally adopts a single-layer structural design, the buffering capacity is limited when the packaging bag is extruded or impacted, and internal articles are easy to damage, the anti-pressure structure comprises a plurality of spherical air bags, the plurality of spherical air bags are arranged in a rectangular array, the plurality of spherical air bags are mutually connected through the plurality of connecting tubular films, the plurality of spherical air bags are communicated with the connecting tubular films, and the spherical air bags distributed in the rectangular array and the connecting tubular films form a dynamic buffer network. When slightly extruded, air in the main hollow air bag and the auxiliary hollow air bag can be transferred to the main connecting air bag and the auxiliary connecting air bag to form an integral expansion buffer layer; under extreme extrusion, the spherical air bag achieves air intercommunication through the tubular thin film, a local strengthening buffering structure is formed, pressure is effectively dispersed, and the situation that articles are damaged due to concentrated stress is avoided.

The utility model belongs to capric acid glyceride production equipment technical field, concretely relates to a kind of enzyme synthesis capric acid glyceride reaction kettle, including reaction kettle, agitator, it is characterized by: reaction kettle top is equipped with the quick sampling mechanism installed by tank top flange one, tank top flange two, quick sampling mechanism includes the pipeline system of venturi, suction tube, connecting pipe, wherein the top end of suction tube is connected to venturi throat, the bottom end of suction tube is inserted into the inside of reaction kettle, venturi two ends are connected nitrogen valve and backwash valve respectively, backwash valve connects reaction kettle inside, connecting pipe connects sample release pipe, sample release valve is installed on sample release pipe, nitrogen valve is connected with nitrogen pipeline.The flow of nitrogen in venturi safely and conveniently takes out reaction liquid, effectively improves sampling convenience and safety;Reaction liquid can be circulated in quick sampling mechanism and reaction kettle to avoid sample cross-contamination.

The utility model discloses a high sealed faucet assembly, including faucet piece and water inlet pipe, the faucet piece bottom position is connected with water inlet pipe, water inlet pipe is connected with water source through the pump body, one side of faucet piece is provided with the valve body of rotation, the valve body is through the rotation axis and is matched with faucet piece, is used for controlling the on -off of faucet piece inside water flow, realizes efficient water -out processing. This high sealed faucet assembly, the fitting mechanism extrudes the gasbag with the help of the rotating block, drives the inflation gasbag closely fits the faucet piece and the water inlet pipe junction, and the seal reliability is ensured in combination with the spring difference design, effectively solve the leakage problem under the high pressure water flow, avoid water resource waste, the elastic bellows in the water outlet mechanism can adjust the water outlet position flexibly, and the impeller drives the cleaning strip to wipe the water outlet hole in real time, prevents the impurity block, and guarantees the even and efficient water outlet. The water draining frame on the rotating block can receive the splashing water drop, reduces the erosion of parts.

This invention discloses a high-reliability ball-locking bearing structure for a top hob and its assembly method. The hob includes a hob shaft, a hob wheel body, and a small-end sealing cap. A large-end sealing cap is integrally mounted on the hob shaft, and the small-end sealing cap is fitted into the hob shaft. A bearing cavity is formed between the inner bore of the hob wheel body and the journal of the hob shaft. The inner bore of the hob wheel body has a large raceway, an R-groove, and a small raceway sequentially formed. Large and small rollers are respectively fitted into the large and small raceways to form a roller bearing. The R-grooves of the hob shaft and the hob wheel body are correspondingly arranged, and balls are fitted inside to form a ball bearing. The two ends of the bearing cavity are sealed by a large-end floating metal sealing ring and a small-end floating metal sealing ring. Both the large-end and small-end floating metal sealing rings have two functional rings. This invention eliminates the bearing rings and multiple fixed sealing structures, thereby improving load-bearing capacity while solving the problem of cap loosening, achieving a synergistic improvement in high load-bearing capacity and high reliability.

The application belongs to a pressure reducing valve structure, aiming at the problems of large volume and weight, large output pressure fluctuation and easy leakage or failure under complex space environment of the existing pressure reducing valve in the satellite electric propulsion system, a micro pressure reducing valve for the satellite electric propulsion system and a satellite electric propulsion system are provided, the primary throttling pressure reduction, the secondary throttling pressure reduction and the diaphragm feedback pressure regulating structure are integrated in the same shell, the high-pressure propellant is gradually reduced in pressure and then stably output, and the pressure fluctuation caused by single-stage large pressure difference pressure reduction is reduced. The diaphragm links the secondary valve core assembly through the top rod, the secondary valve port opening degree is adaptively adjusted according to the pressure change of the low-pressure cavity, the gas supply pressure precision and the thruster working stability are improved. The pressure regulating spring and the adjusting piece can set the output pressure, and the adaptability is improved; the pre-tightening elastic piece and the reset spring help to ensure the opening and closing response and the sealing reliability. The application has compact structure, can reduce the leakage points, and meets the requirements of miniaturization, light weight and high reliability of the satellite electric propulsion system.

The utility model discloses a powder collecting device for a household dust collector, which comprises a powder collecting box arranged on a dust collector shell in a drawing and inserting manner; the lifting mechanism is used for lifting the dust collecting box after the dust collecting box is inserted in place, so that a box opening of the dust collecting box is in sealed butt joint with a dust falling opening in the dust collector shell; the powder collecting device of the household dust collector is good in use convenience, meanwhile, the air leakage phenomenon can be reduced, the service life of the device is prolonged, and the reliability of the device is improved; in addition, the lifting mechanism can effectively guarantee that the box opening of the dust collecting box is in sealed butt joint with the dust falling opening in the dust collector shell, abutting is reliable, the sealing reliability can be guaranteed, and the use reliability of the household dust collector can be improved.

The utility model discloses a sealing connector for hydrogen conveying pipe relates to hydrogen pipeline system technical field, the utility model discloses a connector main part and hydrogen pipe, the hydrogen pipe top is connected with the clamping plate, and the both sides of clamping plate bottom are all provided with recess, and the outer surface of clamping plate is connected with the anti -expansion board, and the both sides of clamping plate are penetrated with the steel wire rope lead seal, the utility model discloses the setting through the clamping plate, and the recess makes the clamping plate convenient installation on the hydrogen pipe from top to bottom, and the clamping plate n -shaped structure can form physical resistance to two nuts, and the nut is reduced because of the external force such as vibration and loosening condition, thereby better maintenance connector's sealed reliability, and the multiple reinforcing bars of the upper portion and the both sides in the clamping plate can enhance the structure rigidity, and reduce the influence of the clamping plate bending deformation to the limiting stability, effectively reduce the phenomenon that the nut loosens because of vibration.

The application discloses a waterproof sealed aluminum shell and belongs to the technical field of motor waterproof sealing. The waterproof sealed aluminum shell comprises a shell body and a rotor arranged in the shell body. A shaft rod is arranged on the rotor. A bearing is arranged at the rear end of the shaft rod. A rear end cover for assembling the shaft is arranged at the rear end of the shell body. A sealing mechanism and a rear bearing cover connected with the sealing mechanism are arranged on the outer side of the rear end cover. The shaft rod penetrates the bearing, the rear end cover, the sealing mechanism and the rear bearing cover in sequence. A fan blade is sleeved with one end of the shaft rod. A fan cover is arranged at the tail end of the shell body. The guide rod and the sealing ring are arranged in the waterproof cylinder shell. The guide rod ensures the accurate installation position of the sealing ring and limits the displacement direction of the sealing ring in the limiting groove. The reset spring is sleeved with the guide rod. The sealing ring is continuously pressed close to the rear bearing cover. The sealing force attenuation caused by aging and abrasion of the sealing ring is compensated. The effective service life of the sealing mechanism is improved.

A multi-pipe-diameter self-adaptive pigging pry connector device comprises a receiving valve and an adjusting pipe. The two sides of the receiving valve communicate with connecting pipes correspondingly, and the connecting pipe on one side of the receiving valve communicates with the conveying pipeline and is used for receiving or sending out the pipe cleaner. One end of the adjusting pipe is communicated with the connecting pipe on one side of the receiving valve, and the other end is communicated with the conveying pipeline; a plurality of adjusting plates are arranged on the inner wall of the adjusting pipe in a surrounding manner; the end, close to the receiving valve, of the adjusting plate is rotationally arranged on the inner wall of the adjusting pipe. A plurality of adjusters are arranged on the outer wall of the adjusting pipe, penetrate through the side wall of the adjusting pipe and are correspondingly connected to the end, away from the receiving valve, of the adjusting plate, and the adjusters are used for controlling the adjusting plate to rotate. The problems that when conveying pipelines with different pipe diameters are connected, an existing connecting device is poor in pipe diameter adaptability, and cost is increased when special connector devices are arranged respectively are solved.

This utility model discloses a liquid connector, which includes a female connector, a male connector, and a gasket. One end of the male connector is installed with the female connector. The outer wall of the male connector has an adjusting ring surface that surrounds it, and the adjusting ring surface is a convex arc surface that protrudes outward. The gasket is sleeved on the male connector, and the inner wall of the gasket has a mating surface that mates with the adjusting ring surface. The gasket has a first state and a second state. In the first state, the mating surface abuts against the adjusting ring surface at a first contact position, so that the male connector maintains a first angle. In the second state, the mating surface abuts against the adjusting ring surface at a second contact position different from the first contact position, so that the male connector maintains a second angle different from the first angle. Through the design of the guide sleeve, the problem of misalignment and displacement that easily occurs when the male and female connectors are docked underwater is effectively overcome, and the convenience and success rate of the docking operation of the male and female connectors are significantly improved.

The invention provides an inner ear infusion needle. The inner ear infusion needle comprises a puncture needle, an infusion tube, a first connecting seat and a second connecting seat, the front end of the infusion tube is fixedly connected with the puncture needle, and the rear end of the infusion tube is fixed in the first connecting seat; the second connecting seat is inserted into the first connecting seat and is in running fit with the first connecting seat; the second connecting seat is used for being connected with a medicine supply device, and a first sealing gasket is arranged between the second connecting seat and the first connecting seat; and the medicine supply device or the second connecting seat or the first connecting seat is provided with a connecting needle for puncturing the first sealing gasket. After the puncture needle is punctured into the inner ear, the problem that an infusion tube is twisted and wound due to angle adjustment of the puncture needle can be solved only by rotating the first connecting seat relative to the second connecting seat, so that the smoothness of subsequent administration can be ensured, and the risk that the puncture needle is separated from the inner ear is reduced.