Magnetic driving pump with leakage-free structure

Abstract

The invention discloses a magnetic drive pump with a leakage-free structure, and relates to the technical field, the magnetic drive pump comprises a base, a magnetic drive pump main body, a motor, a water inlet flange and a leakage-proof assembly, the leakage-proof assembly is fixed through a connecting support, and the leakage-proof assembly comprises a rotary knob, a belt pulley set, a first sleeve, a screw rod and a drive structure; the driving structure drives the clamping strips and the flexible sealing strips on the clamping strips to expand in the radial direction through cooperation of a rotary disc, a transmission groove and a connecting arm to form double sealing with an original static sealing ring of the flange, meanwhile, a cleaning and filtering structure is arranged at the front end of the sealing structure, an impeller is driven to rotate through kinetic energy of inlet water, and a guide groove is matched with a brush plate. The automatic cleaning of the filter screen is realized; the sealing reliability of the flange connector is fundamentally enhanced, self-filtering of inlet water is achieved, and long-term leakage-free operation of the pump is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of magnetic drive pump technology, specifically to a magnetic drive pump with a leak-free structure. Background Technology

[0002] A magnetically driven pump generally consists of a pump head, a magnetic drive coupler, an isolation sleeve assembly, and a drive motor. The pump's inner magnetic rotor and impeller form a rotor assembly, which is driven without contact by the outer magnetic drive assembly. The outer magnetic drive assembly is rigidly connected to the drive motor via a mechanical coupling, thereby achieving contactless power transmission from the drive motor to the pump. The inner and outer magnetic drive assemblies are separated by a high-strength metal or non-metal sleeve to seal the fluid being transported. Gaskets are used for static sealing between the relevant seals, which in principle ensures that the transported fluid does not leak.

[0003] However, in practical engineering applications, the "leak-free" characteristic of magnetically driven pumps is highly dependent on the sealing integrity of their overall structure. In addition to the isolation sleeve itself, the flange interface connecting the pump body to the external pipeline is another potential leakage risk point. Traditional flange connections rely on bolt preload to compress the sealing gasket, which is a static passive seal. Under long-term conditions of pressure fluctuations, temperature cycles, mechanical vibrations, and media corrosion, the gasket material is prone to aging and loosening, and the bolts may creep, leading to a decrease in sealing specific pressure, thus generating micro-leakage at the flange interface that is difficult to detect. In addition, although there are improvements in the existing technology involving the compactness of the pump body structure or external auxiliary sealing, such as a compact magnetically driven pump with application number CN202011203553.9, they often fail to fundamentally achieve reliable compensation for the sealing state at the flange interface, and do not integrate the inlet water pretreatment function with the interface sealing into an integrated design.

[0004] Therefore, there is an urgent need for a magnetic drive pump that can actively enhance the reliability of the seal and effectively pre-treat the incoming water to prevent blockage inside the pump, so as to improve the overall performance of the magnetic drive pump and ensure its long-term operation without leakage. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetically driven pump with a leak-free structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a magnetically driven pump with a leak-free structure, comprising a base, a magnetically driven pump body located on the upper left side of the base, an inlet flange connected to the top left side of the magnetically driven pump body, an outlet flange located on the outer top of the magnetically driven pump body, a connecting flange located on the right side of the magnetically driven pump body, and the magnetically driven pump body being locked to the left side of a motor via the connecting flange; a water supply pipe is bolted to the outside of the inlet flange; and a leak-proof component installed inside the inlet flange, the leak-proof component including a connecting bracket, the connecting... The bracket is locked inside the inlet flange. A pulley assembly is provided inside the lower end of the connecting bracket. The lower middle part of the pulley assembly is connected to the knob, and the knob is rotatably connected to the lower end of the connecting bracket. The upper middle part of the pulley assembly is connected to the first sleeve, and the first sleeve is limited to rotate at the lower end of the connecting bracket. A screw is threaded inside the first sleeve. A second sleeve is installed at the upper end of the connecting bracket. A guide rod is inserted into the second sleeve. A driving structure is provided in the middle of the connecting bracket. The screw, guide rod, and left side of the driving structure are all connected to the sealing structure. A cleaning filter structure is installed on the left side of the sealing structure.

[0007] Preferably, the drive structure includes a servo motor, which is mounted in the middle of the connecting bracket. The output end of the servo motor is connected to a gear set, and the upper end of the gear set is connected to a third sleeve. The third sleeve is limited to rotating in the middle of the connecting bracket, and a rotating shaft is inserted into the middle of the third sleeve. The left end of the rotating shaft is connected to a sealing structure.

[0008] Preferably, the sealing structure includes a protective shell, which is connected to one end of the screw and the guide rod. A guide plate is fixed inside the protective shell on one side, and a turntable is provided outside the guide plate. The turntable is connected to a rotating shaft in the middle, and a transmission groove is opened inside the turntable. A connecting shaft is inserted into the transmission groove, and the insertion end of the connecting shaft is connected to a connecting arm. The connecting arm is slidably inserted into the guide plate, and a retaining strip is locked at the outer end of the connecting arm. A flexible sealing strip is engaged inside the retaining strip, and vertical strips are fixed at equal intervals on the outside of the protective shell.

[0009] Preferably, the flexible sealing strip includes a fluororubber layer, with methyl vinyl silicone rubber layers connected to both the upper and lower sides of the fluororubber layer. A surface-modified graphene layer and a carbon nanotube layer are connected to the outside of the methyl vinyl silicone rubber layer, and the surface-modified graphene layer and the carbon nanotube layer are thermally fused together. Both the fluororubber layer and the methyl vinyl silicone rubber layer are filled with nano-sized polytetrafluoroethylene powder.

[0010] Preferably, the cleaning filter structure includes a connecting plate, which is installed in the middle of the outer side of the protective shell. A filter screen is connected to the outside of the connecting plate. Connecting ends are installed at three ends on one side of the filter screen, and the three connecting ends are connected to the outside of the protective shell. The middle part of the connecting plate is connected to the impeller through a shaft, and a cleaning structure is provided on the outside of the impeller.

[0011] Preferably, the cleaning structure includes a brush rod, which is fixed to the outside of the impeller. A brush plate is telescopically sleeved on the upper end of the brush rod, and a connecting shaft is inserted into the lower end of the brush plate. One side of the connecting shaft is inserted into a guide groove, and the guide groove is opened on the outer surface of the connecting plate.

[0012] Preferably, the first sleeve and the second sleeve are arranged in a triangular trajectory with one below and two above, and the first sleeve has an integral internal thread.

[0013] Preferably, the guide plate extends outwards to five sides, and each side of the guide plate has a connecting arm slidably inserted into its extended end.

[0014] Preferably, the card strip is generally arranged in an arc shape, and the inside of the card strip has a groove that corresponds to the protrusion on the outside of the flexible sealing strip for locking.

[0015] Preferably, the guide groove is formed by sequentially connecting straight grooves in a circular trajectory.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention incorporates a leak-proof component, which uses a connecting bracket as its base. The knob at the bottom of the component drives the first sleeve to rotate via a pulley set, which in turn converts into precise linear motion of the screw, pushing the entire sealing structure axially to the working position. Simultaneously, the servo motor in the middle drives the rotating shaft via a gear set, providing power for the radial sealing of the subsequent sealing structure. This structure transforms the traditional static flange seal into an active seal, significantly improving the initiative and reliability of the interface seal.

[0017] 2. This invention incorporates a sealing structure. Once the sealing structure is in place, a servo motor drives the turntable to rotate. The curved transmission groove on the turntable, in conjunction with the connecting shaft, converts the rotational motion into synchronous radial linear motion of five sets of connecting arms along the guide plate. The arc-shaped retaining strip at the end of the connecting arm then causes the flexible sealing strip to expand outward, tightly adhering to the inner wall of the flange, forming a circumferentially uniform annular sealing barrier to ensure the uniformity of the sealing force. It works in conjunction with the original static sealing ring of the flange to form a dual leak-proof structure that combines physical isolation and active compression.

[0018] 3. This invention features a flexible sealing strip, using a composite of fluororubber and methyl vinyl silicone rubber as the matrix. This ensures excellent elasticity and chemical corrosion resistance of the material over a wide temperature range. The internally dispersed nano-sized polytetrafluoroethylene powder acts as an internal lubricant, significantly reducing internal friction and wear during repeated deformation. The outer layer, constructed with hot-melt mixed surface-modified graphene and carbon nanotubes, forms a high-strength, highly thermally conductive, and wear-resistant reinforced network skeleton. This allows the flexible sealing strip to not only possess excellent active sealing and adaptive compensation capabilities but also resist long-term friction, media corrosion, and thermal aging, thereby achieving an ultra-long service life under harsh working conditions.

[0019] 4. This invention features a cleaning filtration structure. The water flow during pump operation naturally impacts the impeller, causing it to rotate. The impeller drives the brush rod in a circular motion. The insertion shaft at the lower end of the brush is constrained by the trajectory of a guide groove of a specific shape on the connecting plate, forcing the brush to generate periodic radial extension and contraction motion while revolving. In this way, the brush can continuously scrape the surface of the filter screen, automatically removing intercepted impurities and effectively preventing filter clogging. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view cross-sectional structural diagram of the water inlet flange and water delivery pipe of the present invention; Figure 3 This is a front view schematic diagram of the internal structure of the leak-proof component of the present invention; Figure 4 This is a schematic diagram of the sealing structure of the present invention in its unsealed state (left view). Figure 5 This is a schematic diagram of the sealing structure of the present invention in its sealed state from the left view; Figure 6 This is a schematic diagram of the internal structure of the flexible sealing strip of the present invention; Figure 7 This is a front view schematic diagram of the cleaning filter structure of the present invention; Figure 8 This is a schematic diagram of the cleaning structure of the present invention from the left side.

[0021] In the diagram: Base-1, Motor-2, Magnetic Drive Pump Body-3, Inlet Flange-4, Outlet Flange-5, Connecting Flange-6, Water Pipe-7, Leak Prevention Component-8, Connecting Bracket-81, Pulley Set-82, Knob-83, First Sleeve-84, Screw-85, Second Sleeve-86, Guide Rod-87, Drive Structure-88, Servo Motor-881, Gear Set-882, Third Sleeve-883, Rotating Shaft-884, Sealing Structure-89, Protective Shell-891, Guide Plate-892, Turntable-893, Transmission Groove-894, Connecting Shaft-89 5. Connecting arm - 896, Clip - 897, Vertical bar - 898, Flexible sealing strip - 899, Fluororubber layer - 8991, Methyl vinyl silicone rubber layer - 8992, Surface modified graphene layer - 8993, Carbon nanotube layer - 8994, Nano-grade polytetrafluoroethylene powder - 8995, Cleaning filter structure - 810, Connecting plate - 8101, Filter screen - 8102, Connecting end - 8103, Impeller - 8104, Cleaning structure - 8105, Brush rod - 81051, Brush plate - 81052, Insert shaft - 81053, Guide groove - 81054. Detailed Implementation

[0022] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0023] Please see Figures 1-2 This invention provides a magnetically driven pump with a leak-free structure, including a base 1, a magnetically driven pump body 3 on the upper left side of the base 1, an inlet flange 4 connected to the top left side of the magnetically driven pump body 3, an outlet flange 5 on the outer top of the magnetically driven pump body 3 for connecting an outlet pipe, a connecting flange 6 on the right side of the magnetically driven pump body 3, and the magnetically driven pump body 3 is locked to the left side of a motor 2 through the connecting flange 6, and the motor 2 is connected to the internal drive components of the magnetically driven pump body 3 through a coupling, a water supply pipe 7 is bolted to the outside of the inlet flange 4, and a leak-proof component 8 is also included installed inside the inlet flange 4.

[0024] Among them, the inner ring of the inlet of the water inlet flange 4 is integrally formed with a traditional static sealing ring, which is used to achieve basic sealing when it is connected to the flange of the water supply pipe 7.

[0025] Please see Figure 3In this embodiment, the leak-proof component 8 includes a connecting bracket 81, which is locked in the internal cavity of the inlet flange 4 by fasteners. A set of pulleys 82 is provided inside the lower end of the connecting bracket 81. A knob 83 for manual operation is connected to the middle of the lower end of the pulleys 82, and the middle of its upper end is connected to the first sleeve 84. The first sleeve 84 is constrained to the lower end of the connecting bracket 81 and can rotate. A screw 85 is threadedly connected inside the first sleeve 84. Two second sleeves 86 are symmetrically installed at the upper end of the connecting bracket 81. A guide rod 87 is slidably inserted inside each second sleeve 86. A drive structure 88 is provided in the middle of the connecting bracket 81. The screw 85, the two guide rods 87 and the output end of the drive structure 88 are all connected to the outside of the sealing structure 89 on the left side. A cleaning filter structure 810 is further installed on the left side of the sealing structure 89.

[0026] The drive structure 88 includes a servo motor 881, which is mounted in the middle of the connecting bracket 81. The output shaft of the servo motor 881 is connected to the lower end of the gear set 882. The upper end of the gear set 882 is connected to the third sleeve 883. The third sleeve 883 is located in the middle of the connecting bracket 81. A rotating shaft 884 is slidably inserted inside the third sleeve 883. The left end of the rotating shaft 884 is connected to the sealing structure 89 for transmitting rotational motion.

[0027] Please see Figures 4-5 In this embodiment, the sealing structure 89 includes a protective shell 891. The right side of the protective shell 891 is connected to the ends of the screw 85 and two guide rods 87. A star-shaped guide plate 892 is fixedly installed inside the protective shell 891. A turntable 893 is mounted on the outside of the guide plate 892 via a bearing. Its middle part is connected to the rotating shaft 884 of the drive structure 88. Five semi-arc-shaped curved transmission grooves 894 are formed on the turntable 893. One end of each connecting shaft 895 is inserted into a corresponding transmission groove 894. 4. Inside, its insertion end is fixed corresponding to the inside of each connecting arm 896. Each connecting arm 896 slides into the corresponding radial groove of the guide plate 892. An arc-shaped locking strip 897 is fixed at the outer end of each connecting arm 896. The flexible sealing strip 899 is snapped into the annular groove formed by all the locking strips 897. Five vertical strips 898 are fixed at equal intervals on the outside of the protective shell 891 to provide a blocking effect when the flexible sealing strip 899 contracts, ensuring that it is in a contracted elastic state.

[0028] The locking strip 897 is designed in an arc shape, and the groove inside the locking strip 897 corresponds to the protrusion on the outside of the flexible sealing strip 899 for locking, ensuring the quick installation and removal of the flexible sealing strip 899.

[0029] Please see Figure 6In this embodiment, the flexible sealing strip 899 includes a fluororubber layer 8991, and a methyl vinyl silicone rubber layer 8992 is laminated on both the upper and lower surfaces of the fluororubber layer 8991 to provide good elasticity over a wide temperature range. The methyl vinyl silicone rubber layer 8992 is laminated with a surface-modified graphene layer 8993 and a carbon nanotube layer 8994 that have been hot-melted and mixed, thereby forming a high-strength, high-thermal-conductivity and wear-resistant network skeleton. Nanoscale polytetrafluoroethylene powder 8995 is dispersed and filled in the matrix of both the fluororubber layer 8991 and the methyl vinyl silicone rubber layer 8992 to play an internal lubricating role and reduce friction and wear.

[0030] Please see Figure 7 In this embodiment, the cleaning filter structure 810 includes a connecting plate 8101, which is installed on the outer middle of the protective shell 891. A filter screen 8102 is fixed to the outside of the connecting plate 8101. The filter screen 8102 is connected to the outside of the protective shell 891 through three connecting ends 8103. A freely rotatable impeller 8104 is installed in the middle of the connecting plate 8101 through a bearing. A cleaning structure 8105 is provided on the outside of the impeller 8104.

[0031] Please see Figure 8 The cleaning structure 8105 in this embodiment includes a brush rod 81051, which is fixed to the outside of the impeller 8104. A brush plate 81052 is telescopically sleeved at the upper end of the brush rod 81051, and a connecting shaft 81053 is inserted into the lower end of the brush plate 81052. One side of the connecting shaft 81053 is inserted into the guide groove 81054, and the guide groove 81054 is formed on the outer surface of the connecting plate 8101.

[0032] The guide groove 81054 is formed by a series of straight grooves connected in a circular trajectory, which provides a radial extension and retraction guiding effect when the brush plate 81052 is driven to rotate and brush periodically on the surface of the filter screen 8102.

[0033] The working principle of this embodiment is as follows: When it is necessary to enhance the seal at the connection between the inlet flange 4 and the water pipe 7, the operator rotates the knob 83 located at the lower part of the connecting bracket 81. The rotation of the knob 83 is transmitted to the first sleeve 84 through the pulley group 82, causing it to rotate synchronously. Since the first sleeve 84 is threadedly connected to the screw 85 and the axial movement of the screw 85 is constrained, the rotation of the first sleeve 84 is converted into the linear movement of the screw 85 along its axis. The linear movement of the screw 85 will directly push the sealing structure 89 connected to it to move axially as a whole. At the same time, the two guide rods 87 slide under the guidance of the second sleeve 86 to ensure that the sealing structure 89 moves smoothly and without deflection, so that the flexible sealing strip 899 inside it accurately approaches the predetermined sealing area at the connection between the inlet flange 4 and the water pipe 7. Once the sealing structure 89 is in place, the servo motor 881, installed in the middle of the connecting bracket 81, is activated. Its power, after being reduced and increased in torque by the gear set 882, drives the third sleeve 883 and the rotating shaft 884 inserted therein to rotate. The rotating shaft 884 transmits power to the turntable 893 inside the sealing structure 89. The five curved transmission grooves 894 on the turntable 893 rotate accordingly. One end of each connecting shaft 895 is nested in the transmission groove 894, and the other end is fixedly connected to the connecting arm 896. The connecting arm 896 is slidably inserted into the radial groove of the fixed star-shaped guide plate 892. The rotational movement of the turntable 893 is transmitted through the transmission grooves 884. The cooperation between 94 and connecting shaft 895 is transformed into the radial linear movement of connecting arm 896 along guide plate 892. Thus, the five connecting arms 896 extend outwards simultaneously, causing the arc-shaped retaining strip 897 fixed at its outer end and the flexible sealing strip 899 clamped in the retaining strip 897 to expand radially together. Finally, they tightly press against the predetermined sealing area between the water inlet flange 4 and the water supply pipe 7, forming a circumferentially uniform active sealing ring. The flexible sealing strip 899, together with the original static sealing ring on the end face of the water inlet flange 4, constitutes a double redundant sealing structure, which significantly improves the leak prevention reliability at the interface between the water inlet flange 4 and the water supply pipe 7. Subsequently, when the magnetically driven pump body 3 starts, water flows in through the inlet flange 4 and first impacts the impeller 8104 in the cleaning filter structure 810, causing the impeller 8104 to rotate around its axis. The rotation of the impeller 8104 drives the brush rod 81051 fixed outside it to make a circular motion together. The brush 81052 cooperates with the guide groove 81054 opened on the surface of the connecting plate 8101 through the plug shaft 81053. As the brush rod 81051 revolves, the plug shaft 81053 is constrained by the trajectory of the guide groove 81054, which forces the brush 81052 to produce periodic radial extension and retraction motion on the brush rod 81051. This allows the brush 81052 to continuously scrape the surface of the filter screen 8102 outside the connecting plate 8101 while rotating with the impeller 8104, automatically removing the attached impurities, effectively preventing the filter screen 8102 from clogging, ensuring continuous smooth water intake, and protecting the internal components of the pump from particulate matter damage. Secondly, the flexible sealing strip 899 is composed of a matrix made of fluororubber layer 8991 and methyl vinyl silicone rubber layer 8992, which gives it excellent elasticity and wide temperature range stability, enabling it to adapt to the microscopic unevenness of the flange sealing surface. The nano-sized polytetrafluoroethylene powder 8995 dispersed inside provides internal lubrication, while the outer hot-melt mixed surface modified graphene layer 8993 and carbon nanotube layer 8994 form a high-strength, high-thermal-conductivity and wear-resistant network skeleton. These properties work together to significantly reduce wear and heat accumulation of the flexible sealing strip 899 during repeated expansion, contraction and friction with the flange surface, thus ensuring that it still has an ultra-long service life in corrosive and abrasive environments.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic drive pump with a leak-free structure, comprising a base (1), a magnetic drive pump body (3) is arranged on the left side of the upper end of the base (1), a water inlet flange (4) is arranged on the left side of the top of the magnetic drive pump body (3), a water outlet flange (5) is arranged on the outside top of the magnetic drive pump body (3), a connecting flange (6) is arranged on the right side of the magnetic drive pump body (3), and the magnetic drive pump body (3) is locked with the left side of the motor (2) through the connecting flange (6), and a water conveying pipe (7) is bolted on the outside of the water inlet flange (4); characterized in that It also includes a leak-proof assembly (8) installed inside the water inlet flange (4), the leak-proof assembly (8) includes a connecting bracket (81), the connecting bracket (81) is locked inside the water inlet flange (4), a belt pulley group (82) is arranged inside the lower end of the connecting bracket (81), the middle part of the lower end of the belt pulley group (82) is connected with a knob (83), and the knob (83) is rotationally connected with the lower end of the connecting bracket (81), the middle part of the upper end of the belt pulley group (82) is connected with a first sleeve (84), and the first sleeve (84) is rotationally connected with the lower end of the connecting bracket (81), a screw rod (85) is threadedly connected inside the first sleeve (84), a second sleeve (86) is limitingly installed on the upper end of the connecting bracket (81), a guide rod (87) is limitingly inserted into the second sleeve (86), a driving structure (88) is arranged in the middle of the connecting bracket (81), the screw rod (85), the guide rod (87) and the left side of the driving structure (88) are connected with a sealing structure (89), and the sealing structure (89) is installed with a cleaning and filtering structure (810).

2. The magnetic drive pump with no leakage structure according to claim 1, characterized in that: The driving structure (88) includes a servo motor (881), the servo motor (881) is arranged in the middle of the connecting bracket (81), the output end of the servo motor (881) is connected with a gear set (882), the upper end of the gear set (882) is connected with a third sleeve (883), the third sleeve (883) is rotationally connected in the middle of the connecting bracket (81), a rotating shaft (884) is limitingly inserted into the middle of the third sleeve (883), and the left end of the rotating shaft (884) is connected with the sealing structure (89).

3. The magnetic drive pump with no leakage according to claim 2, characterized in that: The sealing structure (89) comprises a protective shell (891), one end of the protective shell (891) is connected with the screw rod (85) and the guide rod (87), a guide plate (892) is fixed on one side of the inside of the protective shell (891), and a rotating disc (893) is arranged outside the guide plate (892), the rotating disc (893) is connected with a rotating shaft (884) in the middle, a transmission groove (894) is formed in the inside of the rotating disc (893), a connecting shaft (895) is inserted into the transmission groove (894), the connecting shaft (895) is connected with a connecting arm (896) at the inserted end, the connecting arm (896) is slidingly inserted into the inside of the guide plate (892), and a clamping strip (897) is locked at the outer end of the connecting arm (896), the clamping strip (897) is connected with a flexible sealing strip (899) in the inside, and vertical strips (898) are fixed on the outside of the protective shell (891) at equal intervals.

4. The magnetic drive pump with no leakage according to claim 3, characterized in that: The flexible sealing strip (899) comprises a fluororubber layer (8991), methyl vinyl silicone rubber layers (8992) are connected to the upper side and the lower side of the fluororubber layer (8991), a surface modified graphene layer (8993) and a carbon nanotube layer (8994) are connected to the outside of the methyl vinyl silicone rubber layers (8992), and the surface modified graphene layer (8993) and the carbon nanotube layer (8994) are hot melt mixed, and nanoscale polytetrafluoroethylene powder (8995) is filled in the inside of the fluororubber layer (8991) and the methyl vinyl silicone rubber layers (8992).

5. The magnetic drive pump with no leakage according to claim 3, characterized in that: The cleaning and filtering structure (810) comprises a connecting plate (8101), the connecting plate (8101) is installed on the middle part of the outside of the protective shell (891), a filter screen (8102) is connected to the outside of the connecting plate (8101), connecting end heads (8103) are installed on one side and three ends of the filter screen (8102), the connecting end heads (8103) on the three sides are connected with the outside of the protective shell (891), a shaft body is arranged between the middle part of the connecting plate (8101) and an impeller (8104), and a cleaning structure (8105) is arranged on the outside of the impeller (8104).

6. The magnetic drive pump with no leakage according to claim 5, characterized in that: The cleaning structure (8105) comprises a brush plate rod (81051), the brush plate rod (81051) is fixed on the outside of the impeller (8104), a brush plate (81052) is telescopically connected to the upper end of the brush plate rod (81051), a plug-in shaft (81053) is inserted into the lower end of the brush plate (81052), one side of the plug-in shaft (81053) is inserted into a guide groove (81054), and the guide groove (81054) is formed on the outer surface of the connecting plate (8101).

7. The magnetic drive pump with no leakage according to claim 1, characterized in that: The first sleeve (84) and the second sleeve (86) are arranged in a triangular track shape, and an internal thread is formed in the inside of the first sleeve (84).

8. The magnetic drive pump with no leakage according to claim 3, characterized in that: The guide plate (892) extends outwardly on five sides, and the connecting arm (896) is slidingly connected to each side extension of the guide plate (892).

9. The magnetic drive pump with no leakage according to claim 3, characterized in that: The clamping strip (897) is in an arc strip shape, and the inside of the clamping strip (897) has a groove corresponding to the protrusion of the flexible sealing strip (899).

10. The magnetic drive pump with no leakage according to claim 6, characterized in that: The guide groove (81054) is sequentially communicated by straight-line grooves in annular tracks.

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