30results about How to "Improve leak-proof performance" patented technology

The utility model relates to a bearing plug sealing structure which is applied to the field of bearings and comprises a bearing outer ring, a plug hole is formed in the bearing outer ring, a plug matched with the plug hole is arranged in the plug hole, a plurality of sealing grooves are formed in the outer edge of the plug, and sealing rings matched with the sealing grooves are arranged in the sealing grooves. The sealing rings abut against the hole wall of the plug hole. The anti-leakage plug has the technical effects that the design of the multiple sealing grooves and the sealing rings can further enhance the anti-leakage capacity, if one sealing ring is cut off due to the influence of external force, leaked lubricating oil can still be intercepted by the remaining sealing ring, the sealing performance of the plug is guaranteed, and the service life of the plug is prolonged. The bearing can continuously keep a good lubrication state in the operation process, friction between the bearing inner ring and the bearing outer ring is reduced, and the service life of the crossed roller bearing is prolonged.

The utility model provides an underground structure top plate hole temporary plugging structure which comprises a retaining wall arranged above a top plate and surrounding the outside of a hole, and the top of the retaining wall is provided with a tongue-and-groove; the cover plate group comprises a plurality of cover plates which are transversely arranged one by one, and the cover plate group is arranged in the tongue-and-groove to seal the top opening of the retaining wall; the waterproof layer is laid on the cover plate group; and the pavement layer is paved on the waterproof layer. According to the utility model, construction and dismantling are effectively facilitated, the construction cost can be effectively reduced, the construction time is shortened, and a good leakproof effect is achieved.

The utility model relates to a composite porcelain bushing explosion-proof current transformer, which comprises a high-voltage shell, an explosion-proof bushing, a base and a secondary junction box, the secondary junction box is arranged on the bottom surface of the base, the high-voltage shell is connected and supported on a bottom plate at the upper end of the base through metal flanges adhered to the two ends of the porcelain bushing, a glass fiber reinforced plastic inner bushing is lined in the porcelain bushing, and the explosion-proof bushing is arranged on the bottom plate. Metal flanges are adhered to the two ends of the porcelain sleeve; the glass fiber reinforced plastic inner sleeve is connected with the shielding supporting pipe in a penetrating mode along the same center line, the shielding supporting pipe extends into the high-voltage shell and supports the secondary coil through the coil shielding cylinder, the shielding supporting pipe is located on a bottom plate at the upper end of the base, a lead is arranged in the shielding supporting pipe, and the two ends of the lead are connected into the secondary coil and the secondary junction box respectively. The shielding supporting pipe is made of hard aluminum alloy, and the space between the shielding supporting pipe and the glass fiber reinforced plastic inner sleeve is filled with insulating gas. The device is simple in structure, effectively guarantees the supporting of a high-voltage insulating part, is firm and stable in structure, can prevent the supporting sleeve from being damaged and leaked, and is safe to use.

The utility model relates to the technical field of valves, in particular to a pressure relief valve which comprises a shell body and an integrated valve element, and the shell body comprises a main flow channel, an installation channel and a pressure relief opening which are sequentially communicated. The integrated valve element comprises a valve element body, an elastic piece and a connecting piece, a sealing plate is arranged at the bottom of the valve element body, a first limiting structure is arranged at the top of the valve element body, a through hole is formed in the middle of the connecting piece, the valve element body movably penetrates through the through hole of the connecting piece, and the connecting piece is located below the first limiting structure. The elastic piece is arranged between the connecting piece and the closing plate; the outer side of the connecting piece is detachably connected with the mounting channel, and the sealing plate is used for sealing a water inlet of the mounting channel. Through the arrangement of the integrated valve core, the assembly steps are reduced, the convenience of assembly and installation of the pressure release valve is improved, and the working efficiency of pipeline laying is improved.

The application relates to the technical field of electronic atomization, and more specifically to an atomizer and an electronic atomization device. The atomizer comprises a casing assembly, a suction nozzle piece, a liquid storage piece, an atomizing core assembly and a sealing piece. The casing assembly is internally provided with a storage cavity. The casing assembly is provided with a suction nozzle mounting position at one end in a first direction. The suction nozzle piece is arranged at the suction nozzle mounting position. The liquid storage piece is arranged in the storage cavity and is used for storing an atomization base material. The sealing piece is arranged between the casing assembly and the suction nozzle piece and is used for preventing the atomization base material in the liquid storage piece from leaking. The sealing piece comprises a main body part and a stop part. One end of the main body part towards the liquid storage piece is recessed to form a liquid storage groove. The stop part is arranged in the liquid storage groove and protrudes relative to the bottom wall of the liquid storage groove. When the atomizer is inverted, the liquid storage groove and the stop part cooperate to prevent the atomization base material from flowing to the suction nozzle piece, which can effectively improve the anti-leakage effect, reduce the waste of the atomization base material and prolong the service life of the atomizer and the electronic atomization device.

The utility model discloses an underground reserve depot and a depot system, and relates to the technical field of underground resource reserve. The internal cavern of the underground reserve warehouse comprises a construction roadway and a reserve cavern, positioning structures distributed in an array mode are arranged in at least part of the internal cavern, and the positioning structures are used for positioning measuring lines for installing transient electromagnetic instruments, so that the measuring lines are spaced by preset distances at different detection position time. According to the scheme, at least the anti-leakage capacity of the underground reserve warehouse can be improved.

The invention discloses a separated data hardware access encryption device, and relates to the technical field of computer security hardware and data encryption, and the key points of the technical scheme are as follows: a host control module is used for carrying out encryption operation on write-in data and / or carrying out decryption operation on read data; the control on the data flow is realized through a first hardware data link with a switch; the system storage module is used for storing the encrypted data through a storage hardware medium and controlling the data flow through a second hardware data link with a switch; and the information management module is used for generating key information according to the input configuration information. The encryption and decryption function and the data storage function are physically separated, it is ensured that encryption and decryption operation is conducted in a special hardware module, data storage is conducted on an independent hardware medium, and the risk that data are directly accessed and cracked in the storage process is effectively avoided through the design.

The utility model relates to the field of oil inlet pipe connecting structure, concretely relates to a booster lubrication oil inlet pipe leakproof connecting structure, including the connector for oil inlet pipe connection, the connector is installed in the oil guide pipe one end. The utility model discloses a booster lubrication oil inlet pipe leakproof connecting structure, through the setting of high temperature resistant guide pipe, sealing washer, rotating cover, high temperature resistant connecting pipe, fixed sleeve, butt joint cover, extrusion block and clamping block, through the high temperature resistant connecting pipe cover in high temperature resistant guide pipe outside, utilize high temperature resistant guide pipe outside two groups of sealing washer to strengthen the leakproofness, then rotate rotating cover and drive the fixed sleeve screwing of high temperature resistant connecting pipe outside, and the fixed sleeve is screwed into rotating cover after, and the connecting sleeve is inserted into the butt joint cover inside, thereby extruding extrusion block and the clamping block below, make the clamping block press in high temperature resistant connecting pipe outside, be located sealing washer rear side to strengthen sealing washer and high temperature resistant connecting pipe leakproofness, also strengthen the overall connecting strength.

The utility model discloses a hydraulic nut convenient to reinforce oil pipe, including hydraulic nut body, the top intercommunication of hydraulic nut body has the connecting pipe, the upper end sealed mounting of connecting pipe has the sealing seat, both sides of sealing seat top all lock tightly and have the sealing plug, both sides inside of sealing seat all are threadedly installed and have sealing adjusting lever. The utility model discloses through injecting hydraulic oil in hydraulic cavity, promotes sealing adjusting lever movement, can make the inside of sealing seat produce pre -tightening force, realizes the quick locking of oil pipe installation end, and the one end of oil pipe and sealing seat inside pass through locking internal thread connection, and its outside sealing washer cooperation support spring and elastic fixed sheet, forms multistage sealing structure, promotes the anti -leakage performance, can effectively seal the connecting part of oil pipe and sealing seat, in addition, further reinforce bottom structure through the external installation locking bolt, avoid the leakage of appearing in the use process and being subjected to the vibration.

The invention discloses a high-temperature floating ring type corrugated pipe mechanical sealing device for a kettle, and relates to the technical field of mechanical sealing. The mechanical sealing device comprises a center shaft, a first shaft sleeve, a first leakage-proof assembly, a second shaft sleeve and an external friction assembly. The first shaft sleeve and the second shaft sleeve are distributed at intervals in the axial direction of the center shaft and are seamlessly fixed to the periphery of the center shaft. The first leakage-proof assembly comprises a first graphite packing and a limiting mechanism. The first shaft sleeve has a first inner ring groove. The first graphite packing is annularly arranged in the first inner ring groove and closely surrounds the center shaft. The limiting mechanism is connected to the first shaft sleeve and abuts against the first graphite packing. And the external friction assembly is seamlessly sleeved outside the first shaft sleeve and the second shaft sleeve. The central shaft and the first shaft sleeve can generate high temperature when rotating in the external friction assembly, so that a gap is possibly generated between the first shaft sleeve and the central shaft, and the first graphite packing is adopted to tightly surround the central shaft to prevent leakage at the position.

The utility model discloses a kind of anti-leakage sprayers, it is related to sprayer technical field, including spray bottle and water guide pipe, the top of the spray bottle is movably connected with the bottom of water guide pipe, and the top of water guide pipe is fixedly connected with water storage tank, the water outlet of water storage tank is fixedly connected with pipe, the top of water storage tank is fixedly connected with spray stand. The utility model is provided with sealing mechanism, first, insert ring and sealing ring are inserted into slot one and slot two respectively, at the same time, rubber pad enters slot two with the movement of sealing ring, then, by the thread cooperation of threaded block and threaded sleeve, rotate threaded sleeve until fixed, to realize the communication of pipe on water storage tank and connecting pipe, its sealing mechanism can improve the sealing property after pipe on water storage tank and connecting pipe are connected, effectively prevent liquid from spilling from connecting place, greatly enhance the anti-leakage effect, in addition, the connecting mode of thread cooperation makes installation become simple and efficient, to meet the practicality of the device.

The invention belongs to the technical field of gaskets, and particularly relates to a dip-formed flange gasket and a preparation method thereof.The preparation method comprises the following steps that firstly, a flexible graphite plate is taken, cut according to a flange gasket template, cleaned and dried; 2, putting the flexible graphite plate treated in the step 1 into a high-pressure impregnation kettle, heating, vacuumizing to negative pressure, adding impregnation liquid, and reacting until the vacuum degree in the high-pressure impregnation kettle is stable; 3, the vacuum state in the high-pressure impregnation kettle is removed, the pressure in the high-pressure impregnation kettle is increased to 0.85-1.25 MPa, and then heating reaction is conducted; and 4, repeating the step 2 and the step 3 for dipping after the reaction is finished, taking out the sample after dipping, and cleaning and drying to obtain the flange gasket. According to the method, more polytetrafluoroethylene can be immersed into the flexible graphite plate, so that the mechanical property and the leakage-proof property of the material are greatly improved.

The utility model relates to the technical field of valves, and discloses a leakproof pneumatic butterfly valve which comprises a valve body, an air cylinder is fixedly connected to the outer wall of the valve body, the output end of the air cylinder is fixedly connected with a first rotating shaft, a first valve plate is fixedly connected to the side wall of the first rotating shaft, and a leakproof assembly is arranged on the inner wall of the valve body. According to the leakproof pneumatic butterfly valve, double sealing of the butterfly valve is achieved through combination of the first valve plate and the second valve plate, the leakproof performance of the valve is enhanced, the risk of leakage is reduced, meanwhile, the first valve plate and the second valve plate are arranged in a 90-degree mode and can cope with impact force of liquid at different angles, and then good operation of a sealing assembly in different environments is achieved; and when the second valve plate is closed, the elasticity of the spring pushes the arc-shaped sealing piece to be clamped with the clamping groove, the sealing performance of the butterfly valve is further improved, the sealing pad abuts against the inner wall of the valve body all the time under the elastic effect of the elastic piece, and the abrasion resistance of the butterfly valve is improved.

The utility model relates to the technical field of fire-fighting pipeline connection, in particular to a pipeline connecting structure and a fire-fighting system.The connecting structure is used for connecting a first pipeline and a second pipeline which are adjacently arranged and sealing a connecting gap between the first pipeline and the second pipeline, and comprises a sealing part which comprises a first opening part; the sealing part forms a first abutting end and a second abutting end at the first opening part, the first abutting end surrounds and abuts against the peripheral wall of the first pipeline, the second abutting end surrounds and abuts against the peripheral wall of the second pipeline, the first abutting end is provided with a first elastic part, and the second abutting end is provided with a second elastic part; the first elastic part provides elastic force towards the first pipeline, and the second elastic part provides elastic force towards the second pipeline. The fire extinguishing system comprises the connecting structure. The pipeline connecting structure and the fire-fighting system can always ensure the sealing performance of the fire-fighting pipeline.

The utility model discloses a kind of high-strength composite seamless pipe fittings, including pipe fitting and snap ring being arranged at the both ends of pipe fitting, the inner wall of pipe fitting is provided with a pair of sector baffle, one end of sector baffle is respectively provided with limit block, clamping groove is arranged between sector baffle and sealing washer, the other end of pipe fitting is provided with pipe fitting plug, one side of pipe fitting plug outside is provided with a pair of sector baffle, one end pipe fitting outside is provided with upper fixed part and lower fixed part, the both ends of upper fixed part are respectively provided with inner rotating part and fixed block, the both ends of lower fixed part are respectively provided with outer rotating part and fixed block, the composite seamless pipe fitting realizes the efficient disassembly of pipe fitting connecting place, the cooperation of snap ring and clamping groove ensures the connection stability, the rotating type opening and closing structure cooperation fastening screw locking device of upper fixed part and lower fixed part, installation process is greatly simplified, both reduce the operating strength of worker, and improve pipe fitting assembly efficiency.

The application discloses a multi-section detachable pressure test joint device for continuous pipes, which comprises a tubular joint inner core, a plurality of tubular joint extension cores which can be connected in sequence, a plate-shaped blind plate assembly, a half sleeve assembly and a plurality of lengthened sleeve assemblies which can be connected in sequence. The joint inner core is arranged in the inner hole of the composite pipe, the joint extension core is arranged in the inner hole of the composite pipe and located at the tail of the joint inner core, the half sleeve assembly is arranged on the outer layer of the composite pipe, the lengthened sleeve assembly is arranged on the outer layer of the composite pipe and the head end surface of the lengthened sleeve assembly is tightly abutted against the tail end surface of the half sleeve assembly. The multi-section detachable pressure test joint device for continuous pipes adopts the joint extension cores and the lengthened sleeve assemblies which can be connected in sequence, can effectively increase the locking length, improves the anti-sliding and anti-leakage capacity of the joint and is suitable for pressure test of joints of different pressure levels.

The utility model discloses a reduction desalted water recycling system which comprises a tank main body, a water outlet pipe and a first water inlet pipe, wherein the water outlet pipe and the first water inlet pipe are arranged at the upper end and the lower end of the tank main body; when the system is used, firstly, electrode power regulation cooling water is reasonably replaced, it is ensured that the water quality of the replaced cooling water meets the follow-up use requirement, in the replacement process, the cooling water is specially detected through the detection device, and the detection device monitors key indexes such as the conductivity and the impurity content of the cooling water in real time; then the replaced cooling water is conveyed into the tank main body through a second water inlet pipe, and then the flow speed of the cooling water is controlled through an electric valve, so that the supplementing amount of the cooling water is accurately controlled, and the liquid level, the pressure and the temperature in the tank main body are stabilized in the optimal state; through cooperative use of the detection device, the electric valve, the first water inlet pipe, the second water inlet pipe, the tank main body and the water outlet pipe, the demand on fresh desalted water is reduced, and the production cost is reduced.

The utility model relates to the technical field of fluorine lining valves, and discloses an anti-leakage fluorine lining valve which comprises a valve assembly, the valve assembly comprises a valve body and first flange plates, the first flange plates are fixedly connected to the two ends of the valve body, a first annular groove is formed in the middle of the surface of one side of each first flange plate, and a first sealing ring is placed in each first annular groove; according to the leakproof fluorine-lined valve, through the arranged valve assembly and the corrosion-resistant assembly, the problems that according to an existing leakproof fluorine-lined valve, in order to prevent leakage, sealing rings are generally padded between flange plates, but the sealing rings cannot be rapidly and accurately placed in the middle positions between the flange plates, and the sealing rings cannot be rapidly and accurately placed in the middle positions between the flange plates are solved; once the sealing ring is obliquely placed, the flange plates still cannot be sealed; or a corrosion-resistant structure of an existing leakage-proof fluorine lining valve is generally embedded in the valve in a mold pressing mode, the service life of the valve is shortened after the valve is used for a long time, and the valve cannot be rapidly taken out and replaced.

This utility model relates to the technical field of ring-pressed thin-walled stainless steel pipes, specifically a ring-pressed connection type thin-walled stainless steel pipe, including a thin-walled stainless steel pipe body. One end of the thin-walled stainless steel pipe body is clamped to a pipe fitting. The outer surface of the pipe fitting is ring-pressed with an annular groove and an annular arc groove. The annular groove is provided with a lower clamp and an upper clamp respectively. Two symmetrically arranged U-shaped seats are fixedly connected to one side of the lower clamp and the upper clamp respectively. Transverse pressure blocks are clamped inside the four U-shaped seats. This utility model uses transverse pressure blocks and positioning blocks, and further supports them with support blocks arrayed on the inner side of the arc plate. This design provides stable external support for the connection of the thin-walled stainless steel pipe. This structure can effectively suppress the bending and deformation of the pipe caused by its own weight, fluid pressure or external vibration, significantly enhance its bending stiffness and overall mechanical stability, and improve its long-term safety and reliability.

The utility model relates to the technical field of waste water treatment equipment, in particular to a waste water evaporator difficult to leak, which is characterized in that a top cover is arranged at the upper end of an outer tank, an exhaust pipe is arranged in the middle of the top cover, a feeding pipe penetrating through an inner tank is arranged at the top of the outer tank, and a discharging pipe inserted into an interlayer is arranged at the bottom of the outer tank; compared with a traditional evaporator with a single-layer structure, the evaporator adopts the design that the inner tank and the outer tank form the interlayer, and the interlayer is filled with low-pressure inert gas, so that even if the inner tank is perforated due to long-term contact with complex wastewater components, wastewater can enter the interlayer firstly, and a buffer layer formed by the inert gas can delay leakage; and the air pressure sensor can monitor abnormity in time, so that the risk of direct leakage of waste water is greatly reduced.

The utility model discloses a battery pack shell of a liquid cooling box, which comprises a hollow cavity structure formed by a battery box cover, a front panel and a cooling bottom plate, and bolt sealing interfaces are arranged at the joints of the battery box cover and the front panel and the cooling bottom plate; the cooling bottom plate comprises at least three splice plates attached to one another and pipeline connectors installed on two splice plates in the cooling bottom plate, inner cavities of the splice plates are provided with circulation cavities formed by dividing of ribs, and the two pipeline connectors are both communicated with the circulation cavities. According to the utility model, the comb-shaped cooling bottom plate hollow cavity structure is adopted, the circulation path of the cooling liquid on the cooling bottom plate is increased, the effect of improving the heat exchange efficiency is further realized, and the split splicing type cooling bottom plate structure is adopted, so that the cooling liquid flowing from top to bottom is difficult to enter the battery pack, and the anti-leakage effect of the battery pack is improved; and the size of the cooling bottom plate is adjustable, so that the cooling device is suitable for more batteries.

The utility model relates to the field of dangerous chemical transportation safety, in particular to a tank car emergency cut-off device which comprises a first pipe body and further comprises a second pipe body, the second pipe body is arranged at one end of the first pipe body, and a first flange and a second flange are arranged outside the first pipe body and the second pipe body respectively. The first pipe body and the second pipe body are fixedly connected through the first flange and the second flange; the cutting-off unit is arranged in the first pipe body and the second pipe body, the cutting-off unit comprises a telescopic air bag and a fusible rod, the fusible rod is disconnected to drive the telescopic air bag to be compressed, and then the first pipe body is blocked to cut off circulation; the cut-off unit comprises a blocking piece arranged in the first pipe body and used for driving the telescopic air bag to be compressed, the emergency cut-off device for the tank car can cut off circulation in an emergency mode when collision occurs during transportation, and can also cut off circulation in an emergency mode when a fire disaster occurs, and therefore the leakproof effect can be enhanced.

This utility model relates to the field of gas pipeline technology. In particular, it relates to a leak-proof connection structure for urban gas pipelines, including a base pipeline. One end of the pipeline is fixedly installed with a flange ring one and a flange ring two. The surface of flange ring two has an installation port for connecting flange ring one and flange ring two. A locking block is fixedly installed on the surface of flange ring one. The protruding end of the locking block has a telescopic opening. A telescopic groove is formed on one side of the inside of the locking block. A locking assembly for locking flange ring one and flange ring two is installed inside the telescopic groove. Through the cooperation of the locking block on the surface of flange ring one with the locking assembly and limiting assembly in the telescopic groove, an efficient, stable, and safe connection is achieved. The tight cooperation between the locking block and the locking assembly significantly improves the connection stability, effectively preventing loosening or detachment, thereby greatly enhancing the leak-proof performance.

This utility model belongs to the field of printer technology, specifically relating to an ink tube connector for a printer ink bottle. Installed inside the cap at the top of the ink bottle, it is integrally molded from silicone material and includes an 8-shaped boss and a circular sealing gasket at the bottom. An 8-shaped limiting hole is provided in the center of the cap, into which the 8-shaped boss is inserted. An 8-shaped through groove extending into the center of the circular sealing gasket extends into the 8-shaped boss. An ink outlet tube, stepped in shape, stands upright on one side of the top of the 8-shaped boss and communicates with the 8-shaped through groove. A groove is formed on the top wall of the other side of the 8-shaped boss, corresponding to the outline of the printer's air duct. This utility model can seal the boss with a thin film above the groove when unopened, preventing ink leakage, and facilitates quick insertion and breaking of the air duct during use, improving the ink dispensing speed of the ink bottle and preventing ink leakage.

The utility model belongs to gas pipeline anti -leakage technical field, specifically is a kind of gas pipeline anti -leakage device, including first pipeline, install protective assembly on the first pipeline and second pipeline;First sealing pad is installed in the buckling place of first shell and second shell, gas leakage detector is installed on the outer wall of second shell by connecting block, alarm is installed on the gas leakage detector, gas leakage detector is connected with gas guide pipe, when gap leaks, the gas of leakage is sealed in first shell and second shell, the gas of leakage cannot leak to operating environment, avoid the health of human body from harm, simultaneously, the gas of leakage enters into gas leakage detector by gas guide pipe, after gas leakage detector detects the gas of leakage, alarm will send alarm signal, realizes the gas of leakage to carry out timely collection and detection, it is beneficial to improve the anti -leakage effect of device to gas.

The utility model relates to the technical field of pet drinking cups, in particular to a portable and practical pet drinking cup which comprises a water storage head, a decorating part, a water outlet control assembly and a fixing part, the decorating part is connected to the bottom surface of the water storage head in a sleeved mode, and the fixing part is connected to the inner side of the bottom of the water storage head in a sleeved mode. The water outlet control assembly is located between the water storage head and the fixing piece. According to the pet drinking cup, due to the carefully-designed sealing and leakproof structure which comprises the upper silica gel waterproof plug, the lower silica gel waterproof plug and the silica gel waterproof ring, the sealing performance and leakproof performance of the pet drinking cup are remarkably improved, water flow can be easily controlled by using the switch which is stable and easy to operate, and meanwhile, the water flow and air circulation of the drinking cup are optimized in design, so that the service life of the pet drinking cup is prolonged. The water outlet and the air inlet ensure that water flow is continuous, smooth and sanitary, water quality is prevented from being polluted by the outside, and the unique water inlet and outlet control part enables the product to be practical in function, smooth in water outlet, free of water leakage, simple in structure, low in price and good in quality.

The invention relates to the technical field of liquid-cooled cabinets, and discloses a liquid-cooled cabinet capable of avoiding coolant leakage, which comprises a cooling box and a cabinet, the bottom of the cabinet is fixedly connected to the top of the cooling box, a water pump is fixedly connected in the cabinet, the bottom of the water pump is fixedly communicated with a water pumping pipe, and the top of the water pump is fixedly communicated with a fixed cooling pipe. A circulating cooling pipe is detachably installed in the cabinet, a sealing effect between a fixed cooling pipe and an installation cooling pipe can be achieved through a sealing assembly, and the sealing effect between the fixed cooling pipe and the installation cooling pipe can be further improved through a multi-layer sealing effect; the sealing assemblies can be tightly fixed to the outer wall of the fixed cooling pipe and the outer wall of the installation cooling pipe through the fastening assemblies, the situation that connection between the sealing assemblies is not tight is avoided, and meanwhile the protection effect is improved while the connection position of the fixed cooling pipe and the installation cooling pipe is further sealed through the first protection shell and the second protection shell.

The utility model discloses a fluid connector with a leakproof structure, which comprises a first joint and a second joint, and one end of the first joint and one end of the second joint are respectively provided with a pipeline; the anti-leakage assembly is arranged in the first connector and the second connector, the anti-leakage assembly comprises a telescopic assembly, the telescopic assembly is arranged in the middle of the interior of the first connector, a piston is arranged below the telescopic assembly, and a sealing opening matched with the piston is formed in the lower end of an inner cavity of the first connector; the anti-leakage assembly further comprises an upper fixing base which is arranged at the upper end of an inner cavity of the second connector, a supporting rod is fixedly arranged at the center of the upper end of the upper fixing base, a supporting block is fixedly arranged at one end of the supporting rod, and when the first connector and the second connector are connected, the supporting block enables the piston to be separated from the sealing opening. The problem of medium leakage after the pipeline and the fluid connector are detached is solved.

The utility model discloses a special leakproof glove structure for a vacuum glove box, and relates to the technical field of vacuum glove boxes, one end of a positioning ring is connected with a sealing disc, one end of the sealing disc is connected with a connecting sleeve in the positioning ring, and a first sealing gasket is arranged at the position, close to a vacuum glove box main body, of one side of the sealing disc; a sealing groove is formed in the inner side of the vacuum glove box body, a fixing groove is formed in the outer portion of the positioning ring, sealing plates are symmetrically arranged in the fixing groove, second sealing gaskets are arranged on the outer portions of the sealing plates, a rotating groove is formed in the inner side of the positioning ring, and a screw rod is arranged in the rotating groove. Through the arrangement of the sealing disc, the first sealing gasket and the connecting sleeve, the sealing disc can be installed through threaded connection of the connecting sleeve and the positioning ring, meanwhile, the sealing performance of the connecting position of the glove body and the vacuum glove box body can be improved through the first sealing gasket, and therefore the purpose of leakage prevention can be improved.

The utility model discloses a sealing device for a pump head of a water pump, which belongs to the technical field of water pumps and comprises a clamping ring, an expansion leather ring and a pair of sealing rings, the sealing rings are distributed at the upper end and the lower end of the clamping ring, the sealing rings are fixedly connected with the clamping ring, and the expansion leather ring is fixedly clamped in the clamping ring. The clamping ring comprises a clamping ring body, and a V-shaped clamping ring groove is formed in the inner side end of the clamping ring body. And avoiding grooves are uniformly formed in the periphery of the clamping ring main body. The clamping ring, the expansion leather ring and the sealing ring are cushioned between the pump head and the pump body, then the screw is tightened, the sealing ring is clamped by the pump head and the pump body, conventional sealing is carried out through the sealing ring, meanwhile, the expansion leather ring is clamped between the pump head and the pump body, and when the sealing ring unfortunately leaks, water pressure acts on the expansion leather ring to enable the expansion leather ring to expand outwards, so that the pump head and the pump body are sealed. The expansion leather ring is further sealed by means of water pressure, and the leak-proof capacity of the pump is improved.