Permanent magnet high-efficiency submersible sewage pump

Abstract

The application discloses a permanent-magnet high-efficiency submersible sewage pump, and relates to the technical field of sewage pumps, which comprises a pump body, a motor shell, a motor shaft, a driving shaft, a jacking isolation disc, a pull rod, a telescopic arc plate, a stator is fixed on the inner wall of the motor shell, a rotor is fixed on the outer side of the motor shaft, and the driving shaft is drivingly connected with the motor shaft; the jacking isolation disc is sleeved on the driving shaft through a bearing, springs are fixed between the jacking isolation disc and the top inner wall of the pump body; the pull rod is arranged at the bottom end of the driving shaft, the bottom end of the pull rod is rotatably installed in a limiting sleeve through a bearing, and the limiting sleeve is provided with a connecting seat one; a fan-shaped plate groove is formed in the bottom of the pump body, one end of the telescopic arc plate is slidably arranged in the fan-shaped plate groove, the other end of the telescopic arc plate is provided with a connecting seat two, and a linkage rod is connected between the connecting seat one and the connecting seat two. The application can effectively slow down the blockage of the pump body and improve the operation efficiency of the sewage pump.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage pumps, in particular to a permanent magnet high-efficiency submersible sewage pump. BACKGROUND

[0002] The submersible sewage pump is a submersible sewage pump that can tear and cut long fibers, bags, belts, grass, cloth strips and other substances in sewage, and then successfully discharge them. It is particularly suitable for transporting liquids containing hard solids, fiber materials and particularly dirty, sticky and slippery liquids.

[0003] The existing patent CN112943621A discloses a submersible sewage pump, which comprises a pump body, a drive shaft, a drive gear, a first impeller, a second impeller and a drive assembly. The drive gear is sleeved on the drive shaft and moves axially reciprocally during rotation of the drive shaft. The transmission shaft of the first impeller is provided with a first connecting gear, and the transmission shaft of the second impeller is provided with a second connecting gear. The drive assembly is connected with the drive shaft to control the axial movement of the drive gear along the drive shaft, forming a connection with the first connecting gear, or a connection with the second connecting gear, or independent rotation. In this way, by controlling the drive gear through the drive assembly, the connection relationship between the drive shaft and the two impellers can be adjusted, so that the submersible sewage pump can continuously output sewage during the alternating work of the first impeller and the second impeller, improving the working efficiency of the sewage pump, and avoiding the burning of the motor, improving the operation reliability and service life of the sewage pump.

[0004] The existing submersible sewage pump will have waste solids entering the pump body during pump operation. The waste solids are clamped between the blades and the pump body, causing the motor to burn out. At the same time, when the waste solids are clamped in the pump body, the space between the pump body and the impeller cannot be adjusted, which easily causes the impeller to be extruded and deformed, and the disassembly and maintenance process is complex when cleaning the waste solids inside the pump body. Therefore, a permanent magnet high-efficiency submersible sewage pump is invented. SUMMARY

[0005] The purpose of the present application is to provide a permanent magnet high-efficiency submersible sewage pump, which solves the following technical problems: the space between the pump body and the impeller cannot be adjusted, which easily leads to the extrusion deformation damage of the impeller, and the disassembly and maintenance process is complex when cleaning the waste solid in the pump body, the driving shaft is set to be movable up and down, when the adsorbent appears in the pump body and is blocked, under the continuous driving operation of the impeller, the impeller is extruded and moves upward, the driving shaft is pushed upward to realize the compression of the spring, when the impeller moves upward, the space in the pump body can be released to allow the clamped object to pass through, the operation efficiency of the sewage pump is improved, and the buffer space of the impeller reduces the broken damage of the impeller, which can better protect the impeller, the driving shaft is pushed upward when the position of the impeller is lifted upward, so that the central shaft is lifted, when the central shaft is lifted, the rotating electrode at the top of the central shaft is separated from the connecting electrode ring, the motor can be de-energized to avoid continuous energization of the motor, and the overall burning loss is caused by the inactivity of the impeller.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A permanent magnet high-efficiency submersible sewage pump comprises a pump body, a motor shell, a motor shaft, a driving shaft, a lifting isolation disc, a pull rod and an extension arc plate.

[0008] The inner wall of the motor shell is fixed with a stator, and the outer side of the motor shaft is fixed with a rotor, and the rotor and the stator are arranged at the same horizontal height.

[0009] One end of the driving shaft is arranged outside the pump body, the other end is arranged inside the pump body, and the driving shaft is slidably connected with the pump body, and the driving shaft is drivingly connected with the motor shaft. The lifting isolation disc is sleeved on the driving shaft through a bearing, and the driving shaft is provided with an impeller below. The lifting isolation disc and the inner wall of the top of the pump body are fixedly connected with a spring.

[0010] The pull rod is arranged at the bottom end of the driving shaft, and the pull rod is located below the impeller. The bottom end of the pull rod is rotatably installed with a limiting sleeve through a bearing, and the limiting sleeve is provided with a connecting seat one. The bottom of the pump body is provided with a fan-shaped plate groove, one end of the extension arc plate is slidably arranged in the fan-shaped plate groove, the other end is provided with a connecting seat two, and the connecting seat one and the connecting seat two are connected with a linkage rod.

[0011] Preferably, the motor shaft is a hollow shaft, a second limiting block is arranged on the inner wall of the bottom of the motor shaft, a second limiting groove is formed in the top of the driving shaft, the top end of the driving shaft is inserted into the inner wall of the bottom end of the motor shaft, and the second limiting block at the bottom of the motor shaft is clamped in the second limiting groove at the top of the driving shaft. A central shaft is arranged in the motor shaft, and the top end of the driving shaft is fixedly connected with the central shaft. A limiting ring is arranged at the top end of the central shaft, a first limiting groove is formed in the limiting ring, a first limiting block is fixedly arranged on the inner wall of the top of the motor shaft, and the first limiting block is clamped in the first limiting groove of the limiting ring. A rotating electrode is fixedly arranged at the top end of the central shaft, a connecting electrode ring is arranged on the motor, the top of the central shaft passes through the inside of the connecting electrode ring, the bottom side of the rotating electrode is in contact with the top side of the connecting electrode ring, and the connecting electrode ring, the rotating electrode and the power supply are connected.

[0012] Preferably, the bottom of the pump body is provided with a sliding hole, the bottom side of the telescopic arc plate is fixedly provided with a connecting screw, the connecting screw is slidingly arranged in the sliding hole, the connecting screw is fixedly provided with a protective strip, the protective strip is arranged in parallel with the sliding hole, and the protective strip is located at the bottom side of the sliding hole.

[0013] Preferably, the motor shell is arranged above the pump body, the bottom of the motor shell is provided with a connecting barrel, the top side of the pump body is provided with an incircle I, and the bottom of the connecting barrel is buckled on the incircle I at the top of the pump body.

[0014] Preferably, the top of the motor shell is provided with a protective cover, a connecting terminal is arranged on the protective cover, and the connecting electrode ring and the rotating electrode are connected with the wires connected with the connecting terminal.

[0015] Preferably, the bottom end of the motor shell is provided with a shaft hole, the bottom end of the motor shaft penetrates through the shaft hole at the bottom of the motor shell and is rotatably arranged, and the contact surfaces of the motor shell and the motor shaft are respectively provided with sealing rubber rings upwards and downwards.

[0016] Preferably, the top of the motor shell is provided with a mounting hole, a connecting bearing is embedded in the mounting hole, and the top end of the motor shaft penetrates through the inner ring of the connecting bearing.

[0017] Preferably, the top of the pump body is provided with a rotating hole, the driving shaft is rotatably arranged in the rotating hole, a gasket is arranged on the middle part of the driving shaft, and a spring is fixedly connected between the gasket and the inner wall of the top of the pump body.

[0018] Preferably, the side of the jacking isolation disc is provided with a rubber ring between the inner wall of the pump body.

[0019] Preferably, the side of the jacking isolation disc is provided with a rubber ring between the inner wall of the pump body.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] By setting the driving shaft as a structure that can move up and down, when the adsorbed object appears to be blocked in the pump body, under the continuous driving operation of the impeller, the impeller is pressed to move upward, pushing the driving shaft to move upward, realizing the compression of the spring, and when the impeller moves upward, the space in the pump body can be released to allow the blocked object to pass through, and the impeller has a buffer space to reduce the damage of the impeller, which can better protect the impeller.

[0022] When the impeller position is lifted upward, the driving shaft can be pushed upward, thereby lifting the central shaft, and when the central shaft is lifted, the rotating electrode at the top of the central shaft is separated from the connecting electrode ring, which can realize power-off of the motor, avoiding continuous power-on of the motor.

[0023] When the impeller is blocked with the pump body, the motor is powered off by the upward movement of the impeller, which can protect the internal structure of the motor and reduce the breakage of the impeller.

[0024] When the driving shaft moves upward, the pull rod at the bottom end moves upward, and when the pull rod moves upward, under the cooperation of the linkage rod, the telescopic arc plate can be pushed into the fan-shaped plate slot, expanding the area of the feed inlet at the bottom of the pump body, which can release space for the blocked object and reduce the internal pressure, and at the same time, it can facilitate the material to enter the pump body, avoiding the blocked object from blocking the feed inlet at the bottom of the pump body, improving the operation efficiency of the sewage pump.

[0025] At the same time, multiple linkage rods are provided to assist in forming a filter port at the bottom of the pump body, reducing the entry of large object structures into the pump body, and better maintaining the operation of the pump.

[0026] When the pump body is blocked, the bottom end of the pull rod can also be pressed manually to press the driving shaft upward, so as to better release the blocked object and more conveniently maintain the normal operation of the pump. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present application.

[0028] Figure 2 is a schematic diagram of the overall structure of the present application without a support cover.

[0029] Figure 3 is a schematic diagram of the overall structure of the present application without a support cover.

[0030] Figure 4 is a schematic diagram of the overall structure of the present application without a support cover.

[0031] Figure 5 is Figure 4 is a schematic diagram of the overall structure of the present application without a support cover.

[0032] Figure 6 is a motor shaft structure display diagram.

[0033] Figure 7 is a motor shaft internal structure schematic diagram.

[0034] Figure 8 is a pump body semi-open structure schematic diagram.

[0035] Figure 9 is a pump body bottom structure schematic diagram.

[0036] Figure 10 is a pump body overhead structure schematic diagram.

[0037] Figure 11 is Figure 10 is a structure schematic diagram along B-B section.

[0038] Figure 12 is a telescopic arc plate position section structure schematic diagram.

[0039] In the figure: 1, pump body, 2, output pipe, 3, connecting cylinder, 4, motor shell, 5, protective cover, 6, connecting terminal, 7, motor shaft, 8, rotor, 9, stator, 10, center shaft, 11, connecting bearing, 12, connecting electrode ring, 13, rotating electrode, 14, first limit block, 15, drive shaft, 16, limit ring, 17, limit groove, 18, second limit block, 19, support cover, 101, spring, 102, rubber ring, 103, gasket, 104, jacking isolation disc, 105, impeller, 106, pull rod, 107, protective strip, 108, connecting screw, 109, telescopic arc plate, 110, linkage rod, 111, limit sleeve, 112, fan-shaped plate groove. DETAILED DESCRIPTION

[0040] The present application will be further clarified by the following examples, which should not be construed as limiting the scope of the application. After reading the application, those skilled in the art will be able to modify the application in various ways, and these modifications fall within the scope of the claims appended hereto.

[0041] The embodiment provides a permanent magnet high-efficiency submersible sewage pump, as shown in the figure, comprising a pump body 1, a motor shell 4, a motor shaft 7, a drive shaft 15, a jacking isolation disc 104, a pull rod 106, a telescopic arc plate 109, wherein: Figures 1-8

[0042] The side of the pump body 1 is provided with an output pipe 2, and the bottom side of the pump body 1 is provided with a support cover 19, which can support the whole when placed.

[0043] ​The motor shell 4 is arranged above the pump body 1, the bottom of the motor shell 4 is provided with a connecting cylinder 3, the top side of the pump body 1 is provided with an incircle I, the bottom of the connecting cylinder 3 is buckled on the incircle I on the top of the pump body 1. The inner wall of the motor shell 4 is fixed with a stator 9, the outer side of the motor shaft 7 is fixed with a rotor 8, and the rotor 8 and the stator 9 are arranged at the same horizontal height.

[0044] The top of the motor shell 4 is matched with a protective cover 5, and the protective cover 5 is provided with a connecting terminal 6.

[0045] By arranging the protective cover 5 on the top of the motor shell 4, the sealing effect of the pump can be further improved, and the rotating electrode 13 and the connecting electrode ring 12 can be protected.

[0046] One end of the driving shaft 15 is arranged outside the pump body 1, and the other end is arranged inside the pump body 1, and the driving shaft 15 is in sliding connection with the pump body 1 up and down, so that the driving shaft 15 can slide up and down in the pump body 1, and the driving shaft 15 is in driving connection with the motor shaft 7. The top of the pump body 1 is provided with a rotating hole, the driving shaft 15 is rotatably arranged in the rotating hole, the middle part of the driving shaft 15 is sleeved with a gasket 103, and the gasket 103 is fixedly connected with the inner wall of the top of the pump body 1 and the spring 101.

[0047] The jacking isolation disc 104 is sleeved on the driving shaft 15 through a bearing, and when the driving shaft 15 moves up and down, the jacking isolation disc 104 can be driven to move up and down. In another embodiment, the jacking isolation disc 104 is sleeved on the lower part of the middle part of the driving shaft 15, the lower part of the driving shaft 15 is provided with an impeller 105, and the side of the jacking isolation disc 104 is provided with a rubber ring 102 between the inner wall of the pump body 1. The jacking isolation disc 104 is fixedly connected with the inner wall of the top of the pump body 1 and the spring 101, and the spring 101 is provided between the jacking isolation disc 104 and the gasket 103.

[0048] During operation, the jacking isolation disc 104 is provided with a spring 101 with high elastic strength, which can ensure the stable movement state of the driving shaft 15 during normal operation, and can drive the impeller 105 to work, thereby ensuring the pumping effect.

[0049] By arranging the rotating disc 104 and the rubber ring 102, it can be ensured that when the jacking isolation disc 105 is forced to rise upward, there is enough space in the pump body 1, and the flexible characteristics of the rubber ring 102 can prevent impurities in the pump body from penetrating into the pump body, thereby better ensuring the action ability of the pump body and the spring 101.

[0050] Please refer to Figures 8-12As shown, the bottom of the pump body 1 is provided with a fan-shaped plate groove 112, and a fan-shaped telescopic arc plate 109 is slidably arranged in the fan-shaped plate groove 112. The bottom end of the drive shaft 15 is connected with a pull rod 106, and the pull rod 106 is located below the impeller 105. The bottom end of the pull rod 106 is rotatably installed in a limiting sleeve 111 through bearing cooperation, and the limiting sleeve 111 is provided with a connecting seat one. The bottom of the pump body 1 is provided with a fan-shaped plate groove 112, one end of the telescopic arc plate 109 is slidably arranged in the fan-shaped plate groove 112, and the other end is provided with a connecting seat two. The connecting seat one and the connecting seat two are connected with a linkage rod 110.

[0051] The bottom of the pump body 1 is provided with a sliding hole which is in communication with the fan-shaped plate groove 112. The bottom side of the telescopic arc plate 109 is fixed with a connecting screw 108 which is slidably arranged in the sliding hole. The connecting screw 108 is fixed with a protective strip plate 107 which is arranged in parallel with the sliding hole and located at the bottom side of the sliding hole.

[0052] The telescopic arc plate 109 is of an arc structure, and the bottom of the pump body 1 is provided with a connecting terminal 6 which is a block of spliced telescopic arc plates 109.

[0053] When the drive shaft 15 moves upward, the bottom end of the pull rod 106 moves upward. When the pull rod 106 moves upward, the telescopic arc plate 109 can be pushed into the fan-shaped plate groove 112 under the cooperation of the linkage rod 110, the area of the feed inlet at the bottom of the pump body 1 is expanded, the space for the blockage is released, the internal extrusion is slowed down, the material can enter the pump body 1 conveniently, and the blockage at the feed inlet at the bottom of the pump body 1 is avoided.

[0054] Multiple linkage rods 110 are arranged to assist in forming a filter port at the bottom of the pump body 1, reducing the entry of large objects into the pump body, and better maintaining the operation of the pump.

[0055] Please refer to Figures 3-8 As shown, the inner wall of the motor shell 4 is fixed with a stator 9, and the outer side of the motor shaft 7 is fixed with a rotor 8. The rotor 8 and the stator 9 are arranged at the same horizontal height.

[0056] The motor shaft 7 is a hollow shaft, the bottom inner wall of the motor shaft 7 is provided with a second limiting block 18, and the top of the drive shaft 15 is provided with a second limiting groove 172. The top end of the drive shaft 15 penetrates the bottom end inner wall of the motor shaft 7, and the second limiting block 18 at the bottom of the motor shaft 7 is fitted and arranged in the second limiting groove 172 at the top of the drive shaft 15.

[0057] The top end of the drive shaft 15 is fixed with a central shaft 10 which is arranged in the central hole of the motor shaft 7.

[0058] The top end of the central shaft 10 is provided with a limiting ring 16, a first limiting groove 171 is formed in the limiting ring 16, a first limiting block 14 is fixed on the inner wall of the top of the motor shaft 7, and the first limiting block 14 is matched and clamped in the first limiting groove 171 of the limiting block.

[0059] The bottom end of the motor shell 4 is provided with a shaft hole, the bottom end of the motor shaft 7 penetrates the shaft hole at the bottom of the motor shell 4 and is rotatably installed, and the contact surfaces of the motor shell 4 and the motor shaft 7 are respectively provided with sealing rubber rings upwards and downwards.

[0060] The top of the motor shell 4 is provided with a mounting hole, the connecting bearing 11 is embedded in the mounting hole, and the top end of the motor shaft 7 penetrates the inner ring of the connecting bearing 11.

[0061] During operation, in order to ensure the sealing effect of the motor shaft 7, a sealing ring groove is arranged at the bottom of the motor shaft 7, and a sealing rubber ring is arranged in the sealing ring groove, so as to ensure the sealing effect of the motor shaft 7.

[0062] During operation, under the mutual operation and cooperation of the rotor 8 and the stator 9, the rotation of the motor shaft 7 can be driven, the motor shaft 7 rotates, and the rotation of the bottom 15 can be driven.

[0063] In order to ensure the upward stretching effect of the driving shaft 15, a limiting groove 17 is arranged at the top of the driving shaft 15, and a second limiting block 18 is arranged at the bottom of the motor shaft 7, which can be matched with each other, and through the rotation of the motor shaft 7, the rotation effect of the driving shaft 15 can be driven, and the upward extension effect of the driving shaft 15 will not be affected.

[0064] At the same time, the limiting block is arranged on the central shaft 10 at the top of the driving shaft 15, and under the cooperation of the first limiting block 14, the synchronous rotation of the shaft central shaft 10 and the motor shaft 7 is ensured, and the normal operation of the sewage pump is ensured.

[0065] Please refer to Figures 5-7As shown, the top end of the center shaft 10 is fixed with a rotating electrode 13, the inside of the protective cover 5 is provided with a hollow connecting electrode ring 12, the top of the center shaft 10 passes through the inside of the connecting electrode ring 12, the bottom side of the rotating electrode 13 is tangent to the top side of the connecting electrode ring 12, the connecting electrode ring 12, the rotating electrode 13 and the wire connected with the connecting terminal 6 are connected, the start-stop power line of the motor is connected in series with the connecting electrode ring 12 and the rotating electrode 13, and during operation, when the impeller 105 is blocked due to the bottom suction, the position of the impeller 105 is lifted upward, when the impeller 105 moves upward, the driving shaft 15 can be pushed upward, thereby lifting the center shaft 10, when the center shaft 10 is lifted, the rotating electrode 13 at the top of the center shaft 10 is separated from the connecting electrode ring 12, the motor can be powered off, and the motor is prevented from being continuously powered, and since the impeller 105 cannot move, the overall burning loss is caused.

[0066] The top of the motor shell 4 is provided with an inscribed ring II, the protective cover 5 is buckled outside the inscribed ring II at the top of the motor shell 4, and the protective cover 5 and the inscribed ring II at the top of the motor shell 4 are fixedly connected by screws, and during operation, the up-down misalignment buckling between the inscribed ring II at the top of the motor shell 4 and the protective cover 5 can ensure the sealing effect of the pump body, and the transverse fixation of the screws can reduce the loosening caused by the overall operation vibration of the pump, and the sealing effect of the pump body can be better maintained.

[0067] The submersible sewage pump of the embodiment is a submersible sewage pump, which can tear and cut long fibers, bags, belts, grass, cloth strips and other substances in sewage, and then smoothly discharge them, and is particularly suitable for conveying liquid containing hard solids and fibrous substances, and particularly dirty, sticky and slippery liquid.

[0068] During the sewage discharge process, the overall sewage pump is placed on the water bottom under the cooperation of the hollow support, and under the energization operation of the stator 9 and the cooperation of the rotor 8, the motor shaft 7 can be rotated.

[0069] Under the rotation cooperation of the motor shaft 7, the driving shaft 15 can be rotated, and when the driving shaft 15 rotates, the impeller 105 at the bottom of the driving shaft 15 is rotated, and during the rotation of the impeller 105, the sludge and impurities are sucked into the pump body 1 under the action of the vortex adsorption force formed by the impeller 105, and are pumped through the output pipe 2.

[0070] Since the impeller 105 is an inverted conical structure with a large upper part and a small lower part, and has a certain arc fan surface, when the adsorbed substances appear in the pump body 1 and are blocked, under the continuous driving operation of the impeller 105, the impeller 105 can push the driving shaft 15 to move upward, so as to compress the spring 101, and when the impeller 105 moves upward, the space in the pump body 1 can be released, so that the clamped objects can pass through, and the impeller 105 has a buffer space, which reduces the broken damage of the impeller 105 and better protects the impeller 105.

[0071] When the impeller 105 is blocked due to bottom suction, the impeller 105 is lifted upward, and when the impeller 105 moves upward, the driving shaft 15 is pushed upward, thereby lifting the central shaft 10, and when the central shaft 10 is lifted, the rotating electrode 13 at the top of the central shaft 10 is separated from the connecting electrode ring 12, the motor is de-energized, and the motor is prevented from being continuously energized. Since the impeller 105 cannot move, the overall burning loss is avoided.

[0072] When the impeller 105 is blocked between the impeller 105 and the pump body 1, the motor is de-energized by lifting the impeller 105, thereby protecting the internal structure of the motor and reducing the breaking of the impeller 105.

[0073] When the impeller 105 is blocked, when the driving shaft 15 moves upward, the bottom end of the pull rod 106 is driven to move upward, and when the pull rod 106 moves upward, under the cooperation of the linkage rod 110, the telescopic arc plate 109 can be pushed into the fan-shaped plate slot 112, the area of the inlet at the bottom of the pump body 1 is expanded, space is provided for the release of the blockage, the internal pressure is reduced, and the material can enter the pump body 1 easily, thereby avoiding the blockage of the blockage at the inlet at the bottom of the pump body 1.

[0074] Meanwhile, a plurality of linkage rods 110 are provided to assist in forming a filter opening at the bottom of the pump body 1, reducing the entry of large objects into the pump body, and better maintaining the operation of the pump.

[0075] When the pump body 1 is blocked, after the overall pump stops operating, the bottom end of the pull rod 106 can also be pressed manually to press the driving shaft 15 upward, so as to better release the blockage and more conveniently maintain the normal operation of the pump.

[0076] The above is only the preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A permanent magnet high-efficiency submersible sewage pump, characterized in that, The components include a pump body (1), a motor housing (4), a motor shaft (7), a drive shaft (15), a lifting isolation plate (104), a tie rod (106), and a telescopic arc plate (109), wherein: A stator (9) is fixed on the inner wall of the motor housing (4), and a rotor (8) is fixed on the outer side of the motor shaft (7). The rotor (8) and the stator (9) are arranged at the same horizontal height. One end of the drive shaft (15) is located outside the pump body (1), and the other end is located inside the pump body (1). The drive shaft (15) is slidably connected to the pump body (1) vertically. The drive shaft (15) is driven by the motor shaft (7). The lifting isolation plate (104) is mounted on the drive shaft (15) through a bearing. An impeller (105) is located below the drive shaft (15). A spring (101) is fixed between the lifting isolation plate (104) and the top inner wall of the pump body (1). The pull rod (106) is located at the bottom end of the drive shaft (15) and is located below the impeller (105); the bottom end of the pull rod (106) is rotatably mounted with a limit sleeve (111) through a bearing, and the limit sleeve (111) is provided with a connecting seat one; the bottom of the pump body (1) is provided with a fan-shaped plate groove (112), one end of the telescopic arc plate (109) is slidably disposed in the fan-shaped plate groove (112), and the other end is provided with a connecting seat two, and a linkage rod (110) is connected between the connecting seat one and the connecting seat two.

2. The permanent magnet high-efficiency submersible sewage pump according to claim 1, characterized in that: The motor shaft (7) is a hollow shaft. A second limiting block (18) is provided on the bottom inner wall of the motor shaft (7). A second limiting groove (172) is provided on the top of the drive shaft (15). The top of the drive shaft (15) is inserted through the bottom inner wall of the motor shaft (7), and the second limiting block (18) at the bottom of the motor shaft (7) is engaged in the second limiting groove (172) at the top of the drive shaft (15). A central shaft (10) is provided inside the motor shaft (7), and the top of the drive shaft (15) is fixedly connected to the central shaft (10). A limiting ring (16) is provided on the top of the central shaft (10). The limiting ring (16) has a first limiting groove (171), and the motor shaft (7) has a first limiting block (14) fixed on the top inner wall. The first limiting block (14) is fitted into the first limiting groove (171) of the limiting block. The top of the central shaft (10) has a rotating electrode (13) fixed on it. The motor has a connecting electrode ring (12). The top of the central shaft (10) passes through the interior of the connecting electrode ring (12). The bottom side of the rotating electrode (13) is in contact with the top side of the connecting electrode ring (12). The connecting electrode ring (12) and the rotating electrode (13) are connected to the power supply.

3. The permanent magnet high-efficiency submersible sewage pump according to claim 2, characterized in that: The bottom of the pump body (1) is provided with a sliding hole, and a connecting screw (108) is fixed on the bottom side of the telescopic arc plate (109). The connecting screw (108) is slidably disposed in the sliding hole. A protective strip (107) is fixed on the connecting screw (108). The protective strip (107) is arranged parallel to the sliding hole and is located on the bottom side of the sliding hole.

4. The permanent magnet high-efficiency submersible sewage pump according to claim 3, characterized in that: The motor housing (4) is located above the pump body (1). A connecting cylinder (3) is provided at the bottom of the motor housing (4). An inner tangent ring is provided on the top side of the pump body (1). The bottom of the connecting cylinder (3) is fastened to the inner tangent ring at the top of the pump body (1).

5. The permanent magnet high-efficiency submersible sewage pump according to claim 4, characterized in that: A protective cover (5) is installed on the top of the motor housing (4), and a connecting terminal (6) is installed on the protective cover (5). The connecting electrode ring (12), the rotating electrode (13) and the wire connected to the connecting terminal (6) are connected.

6. The permanent magnet high-efficiency submersible sewage pump according to claim 5, characterized in that: The bottom end of the motor housing (4) is provided with a shaft hole, and the bottom end of the motor shaft (7) passes through the shaft hole at the bottom of the motor housing (4) and is rotatably installed. Sealing rubber rings are provided on the upper and lower surfaces of the contact surfaces of the motor housing (4) and the motor shaft (7).

7. The permanent magnet high-efficiency submersible sewage pump according to claim 6, characterized in that: The top of the motor housing (4) is provided with a mounting hole, and a connecting bearing (11) is embedded in the mounting hole. The top end of the motor shaft (7) passes through the inner ring of the connecting bearing (11).

8. The permanent magnet high-efficiency submersible sewage pump according to claim 7, characterized in that: The pump body (1) has a rotating hole at the top, and the drive shaft (15) is rotatably disposed in the rotating hole. A gasket (103) is sleeved in the middle of the drive shaft (15), and a spring (101) is fixed between the gasket (103) and the inner wall of the top of the pump body (1).

9. The permanent magnet high-efficiency submersible sewage pump according to claim 8, characterized in that: The pump body (1) has an output pipe (2) on its side and a support cover (19) on its bottom side.

10. The permanent magnet high-efficiency submersible sewage pump according to claim 9, characterized in that: A rubber ring (102) is provided between the side of the lifting isolation plate (104) and the inner wall of the pump body (1).

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