37results about How to "Fix the leak" patented technology

This invention relates to the field of sludge treatment technology and provides an integrated device for low-heat-loss sludge drying and incineration. The device includes a frame, a drying unit, an incineration unit, a sludge conveying unit, a flue gas conveying unit, and a flue gas treatment unit. The flue gas conveying unit consists of an air intake mechanism and an inlet pipe. The air intake mechanism comprises a blower body, a drive assembly, a control assembly, a hollow main shaft, an annular frame, blower blades, and an adjustment assembly. The air intake mechanism can steplessly adjust the blower body's exhaust and suction air volume, output air pressure, and operating efficiency in real time. Based on real-time changes in the moisture content, feed amount, and organic matter content of the wet sludge, it can quickly adjust the blower body's exhaust and suction air volume, precisely control the heat supply of the annular flue gas heat exchange chamber, and precisely control the flue gas volume of the incineration unit. This stabilizes the optimal combustion condition of the incineration unit under a slightly positive pressure, completely solving the problems of positive pressure flue gas leakage or negative pressure cold air infiltration in the incineration unit, and reducing the fluctuation range of the combustion temperature in the incineration unit.

The utility model belongs to the battery field, concretely is a kind of battery component. Mainly solve the sealing problem between pole and shell. Battery component, including shell, multiple single battery, insulating seal and pole extension piece;Shell is equipped with vent, single battery is arranged in shell, shell top plate is equipped with pole avoiding hole corresponding the pole of each single battery;The pole of each single battery is inserted into corresponding pole avoiding hole;Insulating seal is set between the gap of each single battery pole and pole avoiding hole;Pole extension piece is connected with pole one-to-one correspondence, and along pole height direction, to insulating seal, make insulating seal be compressed, seal the gap between pole and pole avoiding hole. The sealing between pole and shell is greatly improved, so that harmful flue gas can only be discharged from the predetermined vent when thermal runaway, to avoid leakage caused by sealing defects.

The utility model relates to compensator repair technical field, and disclose a kind of high-pressure coal gas pipeline compensator temporary repair device, including gas pipeline and compensator, compensator is arranged in gas pipeline periphery, the downside of gas pipeline is provided with V-shaped support, the top of gas pipeline is provided with L-shaped support. In the utility model, first screw hole, first screw rod and abutting block are arranged at the bottom end of V-shaped support, through hole, support plate, second screw hole, second screw rod and sealing press plate are arranged on L-shaped support, when compensator leaks, V-shaped support can be attached with the bottom side of gas pipeline, so that support plate is axially aligned with the leakage point of compensator, then second screw rod is screwed to drive sealing press plate to extrude and attach leakage point, realize fast and accurate sealing leakproofness, then first screw rod is screwed to make abutting block extrude and contact with the bottom of gas pipeline, further improve the tightness of sealing press plate and the leakage point of compensator, effectively solve the problem of compensator leakage, and guarantee the normal operation of gas pipeline system.

The utility model discloses a kind of high-efficiency catalyst material grading equipment, it is related to catalyst material processing technical field.The utility model includes equipment frame, and grading box is movably connected in the equipment frame inner chamber, and grading box one side is equipped with discharge port.The utility model is equipped with discharge assembly, using the linkage structure of slide bar, receiving block, sealing plate and extruding block, the automatic switching of grading box between screening and discharging state is realized, when screening, spring pushes receiving block to make sealing plate tightly clamped discharge port, ensure sealing, after screening is completed, cylinder drives grading box to rotate, extruding block compreses receiving block to drive sealing plate to separate discharge port, realize automatic discharge, this design cleverly uses equipment self-motion as power source, without additional driving device, both solve the problem of material leakage in traditional vibrating screening, and also ensure the accurate opening and closing of discharge port through mechanical linkage, significantly improve material recovery rate and equipment reliability.

The utility model discloses lithium battery mixer rotary inner tube sealing structure relates to sealing structure technical field, including the inner tube body of setting in the inner wall of outer tube, the top of outer tube is provided with the sealing cover, the inner wall of outer tube is provided with the annular plate, in the utility model, through setting up annular plate in the inner wall of outer tube, and install first rotary axle sealing piece with inner tube body surface contact, can effectively prevent the dust, liquid and so on produced in the mixing process material leakage to the outside of outer tube, has guaranteed the clean and safety of mixing environment, has reduced raw material waste and environmental pollution, and first rotary axle sealing piece surface is provided with helical spring, and helical spring can provide certain elasticity, makes sealing piece always with inner tube body surface keep close contact, even in the case where sealing piece has certain abrasion, can guarantee better sealing effect, prolongs the service life of sealing piece, and the maintenance cost of equipment is reduced.

The application discloses a user sensitive information protection method based on a data confusion technology, and comprises the following steps: step S1, generating a sensitive attribute association table based on the association between recommended items and user gender characteristics; step S2, adding confusion ratings to an existing user-item matrix through a sampling strategy according to the sensitive attribute association table obtained in step S1, and constructing a user-item matrix after adding the confusion ratings; step S3, recording the number of confusion ratings added in step S2, applying a removal strategy, and finally generating a confusion matrix after applying the removal strategy; the removal strategy is that the same number of confusion ratings are deleted to maintain the original data size; a user is randomly selected, and when the rating number of the user reaches a set threshold, the items with strong association of the opposite sex are deleted from the rating history of the user. The application can mislead attackers to conduct gender attribute inference, realize user privacy protection, and does not affect the existing personalized recommendation quality of the user.

The application belongs to the technical field of electric energy metering box, and provides a safe multifunctional electric energy metering box, which comprises a box body, a box door hinged to one side of the box body, an inner door sealing flange arranged on the inner side of the box door, a box body sealing flange arranged on the box body in correspondence, and a sealing assembly; the sealing assembly comprises a bracing mechanism arranged on the box door and a ring-shaped self-locking sealing ring; the ring-shaped self-locking sealing ring is sleeved on the bracing mechanism, and the ring-shaped self-locking sealing ring has a bracing state in which the outer side of the ring-shaped self-locking sealing ring is tightly fitted with the inner door sealing flange and the box body sealing flange, and a retraction state in which the outer side of the ring-shaped self-locking sealing ring is separated from the inner door sealing flange and the box body sealing flange; the bracing mechanism is configured to place the ring-shaped self-locking sealing ring in the bracing state when sealing and locking are needed, and to place the ring-shaped self-locking sealing ring in the retraction state when sealing and locking are to be released. The safe multifunctional electric energy metering box has good sealing effect and locking effect on the box door, and is high in safety.

This invention relates to the field of Internet of Things (IoT) technology, specifically to a data encryption method based on WiFi Mesh. The WiFi Mesh-based data encryption method includes the following steps: S1, a key exchange phase, where an unconnected node sends a network access request to a connected node, and the connected node generates a public key A and a private key a using an asymmetric encryption algorithm; S2, the connected node sends public key A to the unconnected node, which generates a random key B using a random number, and encrypts the random key B using public key A to obtain ciphertext b; the broadcast key E is initially generated by the WiFi root node using a random number, and all WiFi Mesh network endpoints use the same broadcast key E; the unicast key F is randomly generated by the connected node. Compared with existing technologies, this invention has the following advantages: it solves the problem of sensitive information leakage during the initial key exchange in data transmission using an asymmetric encryption algorithm; it improves the starting point of the entire cycle, ensuring the security of subsequent data communication.

This utility model discloses an oil wellhead process pipe assembly and an oil wellhead device, including a diversion end component and a combined pipe component. Combined pipe components are horizontally installed on both sides of the diversion end component, and a regulating valve component is connected to the end of the combined pipe component furthest from the diversion end component. Furthermore, a bend component is connected to the end of the regulating valve component furthest from the combined pipe component. This oil wellhead process pipe assembly and device, through the modular structural arrangement of the diversion end component, combined pipe component, regulating valve component, bend component, and capping component, achieves arbitrary combination, expansion, and splicing of the device structure. This allows the oil wellhead process pipe assembly to adapt to the needs of oil wellheads of different sizes and complexities, greatly enhancing the versatility and flexibility of the equipment. The surface is coated with a protective coating made of polytetrafluoroethylene (PTFE). This design not only improves the corrosion resistance of the equipment but also extends its service life.

This application discloses a method, apparatus, device, and storage medium for dynamic isolation and allocation of virtual network addresses, relating to the field of virtual internet technology. The method includes receiving resource request information from a user, determining the currently allocated target virtual network address, and then determining the target network access zone where the target virtual network address resides; obtaining the target tenant identifier corresponding to the target network access zone; and accessing resource information under the target tenant associated with the target tenant identifier through the resource request information. By establishing the correspondence between the target virtual network address, the target network access zone, and the target tenant identifier, the method solves the problems of missing tenant isolation and inefficient fault recovery in related technologies, thereby achieving technical effects such as improved fault recovery efficiency, reduced data leakage risk, and enhanced data security.

This utility model discloses a turbine top cover for visual monitoring, relating to the technical field of turbine top cover structure. The turbine top cover for visual monitoring includes a sealing cover plate, an anti-impact locking assembly, a cover body mounted on the turbine casing, and a transparent cover. An observation hole is provided on the cover body, and the transparent cover is fixedly mounted within the observation hole. The sealing cover plate includes an outer edge and a pressure-resistant part. The outer edge is located on the outer side wall of the cover body. The pressure-resistant part is located within the observation hole and connected to the outer edge. The pressure-resistant part abuts against the transparent cover. A first bolt is provided between the outer edge and the cover body, fixing the outer edge and the cover body together. The anti-impact locking assembly includes a pressure plate with a first limiting groove, into which the nut of the first bolt can extend. This utility model can effectively improve the water pressure resistance of the transparent cover on the turbine top cover, effectively preventing water pressure damage and leakage.

This utility model discloses a cooling water pipeline structure, belonging to the field of chemical technology. It includes an electric furnace body, with a cooling water pipe wound around its outer surface. An outlet pipe is located at the lower side of the cooling water pipe, and an inlet pipe is located at the upper side of the cooling water pipe. An external pipe connection and fixing mechanism is provided at the other end of both the inlet and outlet pipes. This utility model achieves rapid connection and fixing of the external pipe and the cooling water pipe through this external pipe connection and fixing mechanism. Its unique plug and slot design, combined with the locking mechanism of the inclined plug and spring, allows the external pipe to be quickly installed without complex tools and cumbersome steps, greatly saving installation time and labor costs. At the same time, this fixing method is firm and reliable, effectively avoiding cooling water leakage caused by unstable pipe connections and ensuring the stable operation of the cooling system.

This utility model relates to the field of hydraulic system technology and discloses a quick-change self-sealing hydraulic pipeline connector, including a connecting pipe. Sealing rings are fixedly connected to the inner walls of both ends of the connecting pipe. This utility model allows personnel to quickly connect and disconnect the connecting pipe from the interface seat by pressing the positioning pin and pulling the lever. The entire process requires no tools, improving operational efficiency and convenience. It avoids the cumbersome steps and time consumption caused by complex threaded connections or clamp fixation in traditional connection methods, significantly improving the maintenance and replacement efficiency of the hydraulic system. The sealing rings fixedly connected to the inner walls of both ends of the connecting pipe fit tightly with the interface seat, forming a good sealing effect. Simultaneously, the locking mechanism of the positioning pin and the pop-out groove, as well as the locking of the reinforcing rod and the groove, further ensure the stability of the connection, effectively avoiding hydraulic leakage caused by loose connections and reducing hydraulic oil waste and environmental pollution caused by leakage.

This invention belongs to the field of check valve technology, specifically a float-type check valve, including a valve body, a mounting base, a float housing, and a hollow float. The float housing is rotatably assembled via a spherical seat on the mounting base. A ball bearing is provided between the spherical seat and the ball head of the float housing, allowing the float housing to automatically adjust its verticality when the valve body is tilted, maintaining its central axis perpendicular to the horizontal plane. The float housing has a through hole communicating with the inlet, a spherical cavity accommodating the float, and a through groove communicating with the outlet. A branch channel extending to the valve seat sealing surface is opened on the inner wall of the through hole, which can assist in pushing the float open during forward flow. A multi-stage staggered-hole throttling disc is provided on the inner side of the outlet end to reduce the reverse flow velocity. The float housing adopts a split plug-in structure. This invention solves the problems of poor sealing, difficulty in opening under low pressure, and susceptibility to water hammer in traditional float valves installed at tilted angles. It has advantages such as reliable sealing, sensitive response, and adaptability to complex installation environments.

The utility model relates to the technical field of engine oil sump, especially an oil sump of in-line piston engine, an engine and an aircraft, the oil sump is installed in the lower part of engine crankcase body assembly, the oil sump is formed as a basin -like structure with the basically level inner bottom surface, the inner bottom surface of the oil sump is concave downward and forms the oil storage groove that the structure is further outward protruding relative to the outer bottom surface of the oil sump, the upper part inboard of the oil sump is provided with the oil return interface, the bottom of the oil storage groove is provided with the through oil drain hole, the oil drain bolt is sealed in the oil drain hole, the wide edge sealing pad is installed on the sealing edge contact surface of the oil sump and engine crankcase body assembly connection, and the width of wide edge sealing pad is greater than the width of sealing edge contact, the utility model simplifies the oil sump structure, so that can adapt to the large inclination of aircraft ±45 DEG movement, greatly reduces the oil leakage risk simultaneously, and reduces the maintenance cost.

This invention provides a method for controlling the online NH3 generation of a hydrogen engine aftertreatment catalyst, comprising: mixing NOx contained in the exhaust gas of a hydrogen engine with hydrogen, and then passing the mixture into a reactor containing an NTA catalyst; controlling the selectivity of NH3 in the NOx reduction products by adjusting the molar ratio of H2 to NO. This application utilizes H2 to generate NH3 in situ on the NTA catalyst, avoiding the problems of low-temperature crystallization and NH3 leakage. It achieves highly selective conversion of NOx reduction products to NH3 over a wide temperature and concentration range.

This utility model discloses an external pipe suspension structure for the high-temperature hot surface of a gas turbine waste heat boiler, including multiple top suspension beams fixed above the boiler body. Each of the top suspension beams is connected to a base plate via fasteners. Corresponding sleeve connection holes are provided on the base plates for connecting pre-embedded sleeves. Main connecting plates for the suspension device are fixedly installed on the base plates between the sleeves and the top suspension beams on both sides. This utility model adopts a freely sliding external suspension structure, resulting in a lower external temperature. The suspension device can be made of lower-specification materials and thinner steel plates. It completely avoids the risk of flue gas leakage caused by the suspension device passing through insulation. The oval hole structure on the bottom plate of the suspension plate solves the problem of excessive thermal stress caused by the expansion of the header along its length. This structure simplifies manufacturing and maintenance. The frame structure of the suspension beams enhances the stability of the suspension system and reduces the impact of various operating conditions of the peak-shaving unit on the hot surface.

The utility model discloses a slurry pump oil level observation device relates to slurry pump technical field, including slurry pump pump body, the outer wall of one side of slurry pump pump body is connected with elbow pipe, and the top of elbow pipe is connected with pipe cover subassembly and clamping subassembly, wherein pipe cover subassembly includes the first fixed shell of installation in the top of elbow pipe, and the inner wall rotationally connected with worm of first fixed shell, and one end of worm is fixedly connected with knob, and the side of worm away from knob is connected with worm wheel and engages, and the top of worm wheel is fixedly connected with first gear, and the inner wall of tooth ring is connected with a plurality of second gears and engages, and the top of a plurality of second gears is all fixedly connected with baffle, in the utility model, utilize elbow pipe and make oil level observation more intuitive, and it is convenient for operator to judge oil level height accurately, and the waste of lubricating oil caused by oil level misjudgment is reduced, and the damage of oil seal and bearing parts is reduced.

A sealing structure for a corrosion-resistant pump includes a pump body, a sealing structure, and a connecting pipe. A flange in the pump body is connected to a flange in the connecting pipe by a first bolt. The sealing structure is installed at the connection between the pump body and the connecting pipe. The sealing structure consists of an upper cover plate, a lower cover plate, an upper sealing plate, and a lower sealing plate. The upper and lower cover plates are fitted onto the connection between the pump body and the connecting pipe, covering the flange at the connection. The interior of the upper and lower cover plates is provided with several hexagonal limiting grooves that match the hexagonal heads of the first bolts, and the hexagonal heads of the first bolts are embedded in the limiting grooves. The upper and lower sealing plates are slidably connected to the upper and lower cover plates, respectively. Several limiting nuts, threadedly connected to the first bolts, are rotatably provided in the upper and lower sealing plates, and these limiting nuts abut against the nuts of the first bolts. This invention has advantages such as improved sealing performance and ease of installation and removal.

The utility model discloses a flange connection sealing structure of multistage chimney belongs to chimney manufacturing technical field. The structure includes the upper section cylinder section and lower section cylinder section of coaxial connection, and its inner wall is equipped with annular perfusion storehouse, is enclosed by the bent inner ring plate of welding in the upper section cylinder section, the annular inner ring plate of fixed in the lower section cylinder section and the inclined guide ring plate, realizes the automatic positioning of cylinder section, and the perfusion storehouse injects the high temperature -resistant sealing material through the perfusion pipe of through chimney wall. Its advantage lies in: through the dynamic compensation installation deviation and thermal deformation of flexible sealing material, combines the guide positioning and reinforcing structure, and the sealing reliability and service life are improved significantly, and the technical defects that traditional flange sealing is easy to age and leak are solved.

The utility model discloses a cable end protection sleeve, including the outer fixed cover, the outer fixed cover one end is equipped with screw rod formula push -pull subassembly, screw rod formula push -pull subassembly's connecting end fixedly installed have the inner tube, the inner tube is located the open one end with the outer fixed cover between common fixed connection has hollow sealing ring, the outer fixed cover is located the open one end fixed connection has the internal thread cover, the internal thread cover's inside is equipped with a plurality of elastic occlusion piece, in the utility model, through screw rod formula push -pull subassembly drive inner tube compression hollow sealing ring, realize self -adaptation seal, effectively solve the leakage problem that cable outer skin uneven leads, simultaneously, the elastic occlusion piece in the internal thread cover and the taper inclined plane cooperation of movable ring, form the progressive locking structure, ensure that pressure distribution is even, guarantee fixed effect. This design adopts the thread drive mechanism, significantly reduce the installation difficulty, be applicable to big diameter cable, have sealed reliable, convenient operation, strong adaptability etc.

The utility model discloses a hot gas pipe expanding mould relates to the field of automobile stamping part manufacturing, including upper die, lower die, side push plug and stripping assembly. Upper die and lower die close and form the cavity for the pipe fitting forming, and the side push plug slides through the slide rail, and one end is connected hydraulic cylinder, and the other end is conical and is built -in gas path channel, and the hydraulic cylinder drives the conical end face to block the pipe fitting, and high temperature and high pressure gas realizes the gas inflation forming through the gas path channel. The side push plug adopts split type structure, and the conical head surface nitriding treatment, and the hardness is greater than or equal to HRC60, and the wear resistance and the thermal fatigue resistance are enhanced. The stripping assembly includes pneumatic push rod and push block, and the push block pushes out the pipe fitting when opening the mould. The cavity contact surface is equipped with high temperature resistant sealing layer, and the lower die is equipped with the positioning pin, and the forming precision is ensured. The utility model discloses through optimizing sealing, demolding and positioning design, improves pipe fitting forming qualified rate and production efficiency, is applicable to the round pipe expansion process, has high versatility and reliability.

This utility model provides a water purification equipment pipe connection assembly, relating to the field of water purification pipe connection technology. It includes a water purifier body with a connection port welded to its front end. A connection assembly is provided at the right end of the connection port. The connection assembly includes a connecting pipe disposed at the right end of the connection port, a retaining ring installed at the end of the connecting pipe, a connecting joint on the right side of the retaining ring, a connecting pipe on the right side of the connecting joint, and a sealing head at the left end of the connecting pipe. The sealing head is inserted into a sealing inner ring, and the arc-shaped structure of the two aligns them, allowing the sealing head to fit tightly into the sealing inner ring. The diameter design of the sealing head ensures that it can exert a certain amount of pressure on the sealing inner ring after installation, thereby improving sealing performance, increasing the connection stability between the sealing head and the sealing inner ring, and preventing leakage problems caused by excessive water pressure.

This invention discloses a dual-station steering gear housing machining fixture in the same direction and its usage method. It includes a base with a first machining position on the base. The first machining position has a first mounting surface (higher on the outside, lower on the inside) and a second mounting surface. The first mounting surface is located on the left side of the first machining position, and the second mounting surface is located on the right side. A left-section positioning mechanism is disposed on the first mounting surface for positioning the left half of the steering gear housing. A middle-section support and clamping mechanism is disposed on the left half of the second mounting surface for supporting, clamping, and positioning the middle section of the steering gear housing. A right-section positioning mechanism is disposed on the right half of the second mounting surface for positioning the right half of the steering gear housing. This invention effectively avoids dimensional deviation problems, improves the stability and accuracy of clamping, effectively reduces production costs, significantly reduces the probability of human error, and significantly reduces equipment modification costs.

The utility model provides a kind of air-tightness detection device, it is related to waterway air-tightness detection technical field.The device includes installation cylinder, connecting pipe and elastic sealing element, installation cylinder has internal passage for inputting detection gas to measured area, connecting pipe is slidably connected with installation cylinder, elastic sealing element, it is sleeved in connecting pipe, when connecting pipe slides to first preset position along axial direction, connecting pipe drives elastic sealing element to extrude at the end surface of installation cylinder, elastic sealing element can expand along radial direction, to seal measured area.The device can quickly complete sealing effect without complex operation, significantly shorten detection time, meet the demand of on-site rapid detection, the sealing structure can effectively compensate the size tolerance and surface roughness deviation of waterway interface, avoid the leakage problem caused by the cooperation gap of traditional rigid sealing element, meet the reliability of sealing while structure is simpler, operation is more convenient, and structure cost is lower.

This application discloses an automatic memory reclamation method for an in-vehicle SOME / IP protocol stack based on shadow threads, relating to the field of vehicle system development. The method includes: S1: Data reception and timestamp injection: When the protocol stack receives network data packets and allocates memory blocks to cache data, it injects a timestamp into the memory block while storing the data content; S2: Starting a background shadow thread: During the SOME / IP protocol stack initialization phase, a low-priority background shadow thread, independent of the main communication logic of the protocol stack, is started; the shadow thread scans all data cache memory blocks within the protocol stack at a preset period; S3: Timeout determination and forced reclamation triggering: The shadow thread traverses all cache memory blocks and calculates the time difference Δt between the current system time and the memory block timestamp; if Δt is greater than or equal to a preset safety threshold, and it is detected that the upper-layer application has not yet called the Get interface to read the memory block data, then the memory block is determined to be a timeout unread memory block, triggering a forced reclamation mechanism.

The utility model relates to a kind of material closed discharge device and material transfer system, belong to material transfer technical field.Material closed discharge device includes butt flange, material bucket cover, connecting pipe and lifting mechanism, the butt flange is connected with the discharge pipe of airflow mixer, the bucket mouth of the material bucket cover is adapted, respirator is equipped on the material bucket cover, the connecting pipe uses hose, the connecting pipe connects butt flange and material bucket cover, the material bucket cover can be moved downwards under the action of the lifting mechanism and cover on turnover material bucket, the material of airflow mixer can enter the closed discharge in the turnover material bucket.The utility model is simple in structure, convenient to operate, realize the closed processing of the material of airflow mixing machine in discharging process, effectively avoid the problem that powder is exposed or leaked from gap, reduce the waste of material, improve workshop working environment, reduce safety risk.

This invention discloses an adversarial hint copyright verification method and device based on multi-model joint gradient optimization. Addressing the weaknesses of single-model fingerprint generation in terms of weak adversarial capabilities, poor transferability, and insufficient concealment, this invention constructs multiple downstream models to simulate technical variations of the original model series. It employs multi-model joint gradient optimization to generate adversarial hints with cross-model recognition capabilities as model fingerprint features. Copyright verification is achieved by detecting the specific response patterns of the test model to the adversarial hints. This invention relies on multiple downstream models to capture the most essential features of the original model. Adversarial hints optimized using these features possess stronger specificity and effectiveness, effectively addressing intellectual property risks such as model leakage and unauthorized distribution.

The utility model relates to permanent magnet water pump technical field discloses the permanent magnet water pump sealing assembly of anti -seepage acid and alkali corrosion, include: support seat, the motor shell of support seat on being equipped with drive shaft, drive shaft one end extends to the outside of motor shell, and the end part is provided with impeller shell, drive shaft stretches into the impeller shell, and is equipped with the taper head, drive shaft is equipped with the impeller on the sleeve. The sealing ring and drive shaft bearing that set up effectively improved the sealing performance, prevented the occurrence of the leakage problem. Meanwhile, the sealing ring and drive shaft bearing material that adopt have good acid and alkali corrosion resistance, can keep good working condition for a long time under the acid and alkali environment, prolong the service life of water pump. In addition, the compact structure of sealing assembly of the utility model, easy installation is applicable to various permanent magnet water pump, has higher practical value and popularization prospect.