Permanent magnet efficient submersible sewage pump

Abstract

The invention discloses a permanent magnet efficient submersible sewage pump, and relates to the technical field of sewage pumps, the permanent magnet efficient submersible sewage pump comprises a pump body, a motor shell, a motor shaft, a driving shaft, a jacking isolation disc, a pull rod and 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 in driving connection with the motor shaft; the driving shaft is sleeved with the jacking isolation disc through a bearing, and a spring is fixedly connected between the jacking isolation disc and the inner wall of the top of the pump body. The pull rod is arranged at the bottom end of the driving shaft, a limiting sleeve is rotationally installed at the bottom end of the pull rod through a bearing in a matched mode, and the limiting sleeve is provided with a first connecting base; a fan-shaped plate groove is formed in the bottom of the pump body, one end of the telescopic arc plate is arranged in the fan-shaped plate groove in a sliding mode, a second connecting base is arranged at the other end of the telescopic arc plate, and a linkage rod is connected between the first connecting base and the second connecting base. The sewage pump can effectively relieve blockage of the pump body, and the operation efficiency of the sewage pump is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage pumps, and in particular to a permanent magnet high-efficiency submersible sewage pump. Background Art

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

[0003] The existing patent CN 112943621A discloses a submersible sewage pump, including 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 performs axial reciprocating movement during the rotation of the drive shaft; a first connecting gear is provided on the transmission shaft of the first impeller, and a second connecting gear is provided on the transmission shaft of the second impeller, and the drive assembly is connected to the drive shaft to control the drive gear to move axially along the drive shaft, forming a connection with the first connecting gear, or a connection with the second connecting gear, or an independent rotation. In this way, through the control of the drive gear by 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 operation of the first impeller and the second impeller, thereby improving the working efficiency of the sewage pump, and at the same time avoiding the occurrence of motor burning, improving the operating reliability and service life of the sewage pump.

[0004] When the existing submersible sewage pump is operating, waste solids will enter the pump body and get stuck between the blades and the pump body, causing the motor to burn out. At the same time, when the waste solids are stuck in the pump body, since the space between the pump body and the impeller cannot be adjusted, it is easy to cause the impeller to be squeezed, deformed and damaged. At the same time, when cleaning the waste solids inside the pump body, the disassembly and maintenance process is complicated. Therefore, a permanent magnet high-efficiency submersible sewage pump is invented. Summary of the invention

[0005] The purpose of the present invention is to provide a permanent magnet high-efficiency submersible sewage pump to solve the following technical problems: when waste solids are stuck in the pump body, the space between the pump body and the impeller cannot be adjusted, which easily leads to the extrusion deformation and damage of the impeller. At the same time, when the waste solids inside the pump body are cleaned, the disassembly and maintenance process is complicated. The present invention sets the drive shaft as a structure that can move up and down. When the adsorbed material appears in the pump body and blocks the impeller, or when the impeller in the pump body is stuck, under the continuous driving operation of the impeller, the impeller is squeezed and moves upward, pushing the drive shaft to move upward, so as to compress the spring. When the impeller moves upward, the space in the pump body can be released so that the stuck object can pass through, thereby improving the operation efficiency of the sewage pump. At the same time, there is a buffer space in the impeller, which reduces the crushing and damage of the impeller, and can better protect the impeller. When the impeller is lifted upward, the drive shaft can be pushed upward, so as to lift the central shaft. When lifting, the rotating electrode at the top of the central shaft is separated from the connecting electrode ring, so that the motor can be powered off, and the motor can be prevented from being continuously powered on. Since the impeller cannot move, the overall burning occurs.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A permanent magnet high-efficiency submersible sewage pump, comprising a pump body, a motor housing, a motor shaft, a drive shaft, a lifting isolation plate, a pull rod, and a telescopic arc plate, wherein: A stator is fixed on the inner wall of the motor housing, a rotor is fixed on the outer side of the motor shaft, and the rotor and the stator are arranged at the same level.

[0007] One end of the drive shaft is arranged outside the pump body, and the other end is arranged inside the pump body, and the drive shaft is slidably connected with the pump body up and down, and the drive shaft is drivingly connected with the motor shaft. The lifting isolation disk is sleeved on the drive shaft through a bearing, and an impeller is arranged below the drive shaft. A spring is fixedly connected between the lifting isolation disk and the top inner wall of the pump body.

[0008] 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 mounted with a limit sleeve through a bearing, and the limit sleeve is provided with a connecting seat 1. A fan-shaped plate groove is provided at the bottom of the pump body, one end of the telescopic arc plate is slidably arranged in the fan-shaped plate groove, and a connecting seat 2 is provided at the other end, and a linkage rod is connected between the connecting seat 1 and the connecting seat 2.

[0009] Preferably: the motor shaft is a hollow shaft, a second limit block is provided on the bottom inner wall of the motor shaft, a second limit groove is provided on the top of the drive shaft, the top of the drive shaft is inserted into the bottom inner wall of the motor shaft, and the second limit block at the bottom of the motor shaft is fitted and clamped in the second limit groove at the top of the drive shaft. A central shaft is provided in the motor shaft, and the top of the drive shaft is fixedly connected to the central shaft. A limit ring is provided at the top of the central shaft, a first limit groove is provided on the limit ring, a first limit block is fixed on the top inner wall of the motor shaft, and the first limit block is fitted and clamped in the first limit groove of the limit block. A rotating electrode is fixed at the top of the central shaft, a connecting electrode ring is provided on the motor, the top of the central shaft passes through the interior of the connecting electrode ring, the bottom side of the rotating electrode is in contact and tangent with the top side of the connecting electrode ring, and the connecting electrode ring and the rotating electrode are connected to a power source.

[0010] Preferably: a sliding hole is provided at the bottom of the pump body, a connecting screw is fixed to the bottom side of the telescopic arc plate, the connecting screw is slidably set in the sliding hole, a protective strip is fixed on the connecting screw, the protective strip is set parallel to the sliding hole, and the protective strip is located on the bottom side of the sliding hole.

[0011] Preferably, the motor housing is arranged above the pump body, a connecting tube is arranged at the bottom of the motor housing, an inscribed ring 1 is arranged at the top side of the pump body, and the bottom of the connecting tube is buckled on the inscribed ring 1 at the top of the pump body.

[0012] Preferably, a protective cover is installed on the top of the motor housing, a connecting terminal is installed on the protective cover, and the connecting electrode ring and the rotating electrode are connected to the wires connected to the connecting terminal.

[0013] Preferably, the bottom end of the motor housing is provided with an axial hole, the bottom end of the motor shaft passes through the axial hole at the bottom of the protective cover for rotatable installation, and sealing rubber rings are respectively provided on the upper and lower contact surfaces of the motor housing and the motor shaft.

[0014] Preferably, a mounting hole is provided on the top of the motor housing, a connecting bearing is embedded in the mounting hole, and the top end of the motor shaft passes through the inner ring of the connecting bearing.

[0015] Preferably, a rotating hole is provided on the top of the pump body, the driving shaft is rotatably arranged in the rotating hole, a gasket is sleeved on the middle part of the driving shaft, and a spring is fixedly connected between the gasket and the top inner wall of the pump body.

[0016] Preferably, an output pipe is arranged on the side of the pump body, and a support cover is arranged on the bottom side of the pump body.

[0017] Preferably, a rubber ring is provided between the side of the lifting isolation disc and the inner wall of the pump body.

[0018] Compared with the prior art, the present invention has the following beneficial effects: By setting the drive shaft as a structure that can move up and down, when adsorbed matter appears to block the pump body or jams the impeller in the pump body, the impeller is continuously driven to squeeze the impeller and move upward, pushing the drive shaft to move upward, thereby compressing the spring. When the impeller moves upward, the space in the pump body can be released to allow the stuck object to pass through. At the same time, there is a buffer space for the impeller, which reduces the breakage and damage of the impeller and can better protect the impeller.

[0019] Lifting upward at the impeller position can push the drive shaft upward, thereby lifting the center shaft. When lifting, the rotating electrode on the top of the center shaft is separated from the connecting electrode ring, which can cut off the power to the motor and prevent the motor from being continuously powered on, which would cause overall burning due to the impeller being unable to move.

[0020] When a blockage is stuck between the impeller and the pump body, the impeller rises to cut off the power to the motor, which can firstly protect the internal structure of the motor and at the same time reduce the breakage of the impeller.

[0021] When the driving shaft moves upward, it drives the pull rod at the bottom to move upward. When the pull rod moves upward, with the cooperation of the linkage rod, the telescopic arc plate can be pushed into the fan-shaped plate groove, thereby expanding the feed port area at the bottom of the pump body. This can free up space for blockages, reduce internal extrusion, and facilitate the entry of materials into the pump body, thereby avoiding blockages at the feed port at the bottom of the pump body and affecting its use, thereby improving the operating efficiency of the sewage pump.

[0022] At the same time, multiple linkage rods are set up to assist in forming a filter port at the bottom of the pump body, thereby reducing the entry of large objects into the pump body and better maintaining the operation of the pump.

[0023] If blockage occurs in the pump body, you can also manually press the bottom end of the pull rod to squeeze the drive shaft upward to better release the blockage and more conveniently maintain the normal operation of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the overall structure of the present invention without the support cover.

[0026] Figure 3 This is the overall semi-open structure diagram of the present invention Figure 4 It is a schematic diagram of the top structure of the present invention.

[0027] Figure 5 yes Figure 4 Schematic diagram of the AA section structure along the middle edge.

[0028] Figure 6 This is a diagram showing the motor shaft structure.

[0029] Figure 7 This is a schematic diagram of the internal structure of the motor shaft.

[0030] Figure 8 It is a schematic diagram of the semi-open structure of the pump body.

[0031] Fig. 9 It is a schematic diagram of the bottom structure of the pump body.

[0032] Fig.10 It is a schematic diagram of the pump body structure from a top view.

[0033] Fig.11 yes Fig.10 Schematic diagram of the structure cut along the middle line BB.

[0034] Fig.12 It is a schematic diagram of the cross-section structure of the telescopic arc plate position.

[0035] In the figure: 1, pump body, 2, output pipe, 3, connecting tube, 4, motor housing, 5, protective cover, 6, connecting terminal, 7, motor shaft, 8, rotor, 9, stator, 10, central axis, 11, connecting bearing, 12, connecting electrode ring, 13, rotating electrode, 14, first limit block, 15, driving shaft, 16, limit ring, 17, limit groove, 18, second limit block, 19, support cover, 101, spring, 102, rubber ring, 103, gasket, 104, lifting isolation plate, 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

[0036] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0037] This embodiment provides a permanent magnet high-efficiency submersible sewage pump, such as Figure 1-8 As shown, it includes a pump body 1, a motor housing 4, a motor shaft 7, a drive shaft 15, a lifting isolation plate 104, a pull rod 106, and a telescopic arc plate 109, wherein: An output pipe 2 is disposed on the side of the pump body 1, and a support cover 19 is disposed on the bottom side of the pump body 1. When the whole is placed, the support cover can support the whole.

[0038] The motor housing 4 is arranged above the pump body 1, a connecting tube 3 is arranged at the bottom of the motor housing 4, an inscribed ring 1 is arranged at the top side of the pump body 1, and the bottom of the connecting tube 3 is buckled on the inscribed ring 1 at the top of the pump body 1. A stator 9 is fixed on the inner wall of the motor housing 4, a rotor 8 is fixed on the outer side of the motor shaft 7, and the rotor 8 and the stator 9 are arranged at the same level.

[0039] A protective cover 5 is mounted on the top of the motor housing 4 , and a connecting terminal 6 is mounted on the protective cover 5 .

[0040] By providing a protective cover 5 on the top of the motor housing 4 , the sealing effect of the pump can be further improved, and at the same time, the rotating electrode 13 and the connecting electrode ring 12 can be protected.

[0041] One end of the drive shaft 15 is arranged outside the pump body 1, and the other end is arranged inside the pump body 1, and the drive shaft 15 is connected to the pump body 1 in an up-and-down sliding manner, so that the drive shaft 15 can slide up and down inside the pump body 1, and the drive shaft 15 is connected to the motor shaft 7 in a driving manner. A rotating hole is arranged at the top of the pump body 1, and the drive shaft 15 is rotatably arranged in the rotating hole. A gasket 103 is sleeved on the middle part of the drive shaft 15, and a spring 101 is fixedly connected between the gasket 103 and the top inner wall of the pump body 1.

[0042] The lifting isolation disc 104 is sleeved on the drive shaft 15 through a bearing. When the drive shaft 15 moves up and down, it can drive the lifting isolation disc 104 to move up and down. In another embodiment, the lifting isolation disc 104 is sleeved in the middle and lower part of the drive shaft 15, and an impeller 105 is arranged below the drive shaft 15. A rubber ring 102 is arranged between the side of the lifting isolation disc 104 and the inner wall of the pump body 1. A spring 101 is fixedly connected between the lifting isolation disc 104 and the top inner wall of the pump body 1, and a gasket 103 is arranged between the spring 101 and the lifting isolation disc 104.

[0043] During operation, a spring 101 with relatively high elastic strength is arranged on the lifting isolation disk 104. During normal operation, the movement state of the driving shaft 15 can be ensured to be stable, and the driving operation of the impeller 105 can be realized to ensure the pumping effect.

[0044] By setting the coordination of the rotation 104 and the rubber ring 102, it can be ensured that when the jacking isolation plate 105 is forced to be lifted upward, there is enough space for movement in the pump body 1. With the help of the flexible characteristics of the rubber ring 102, impurities in the pump body can be prevented from penetrating into the pump body, thereby better ensuring the action capacity of the pump body and the spring 101.

[0045] See also Figure 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 with a limit sleeve 111 through a bearing, and the limit sleeve 111 is provided with a connecting seat 1. 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 2, and a linkage rod 110 is connected between the connecting seat 1 and the connecting seat 2.

[0046] A sliding hole is provided at the bottom of the pump body 1, and the sliding hole is connected to the fan-shaped plate groove 112. A connecting screw 108 is fixed to the bottom side of the telescopic arc plate 109, and the connecting screw 108 is slidably set in the sliding hole. A protective strip plate 107 is fixed on the connecting screw 108, and the protective strip plate 107 is set parallel to the sliding hole. The protective strip plate 107 is located on the bottom side of the sliding hole.

[0047] The telescopic arc plate 109 is an arc-shaped structure, and a telescopic arc plate 109 composed of 6 connecting terminals is provided at the feed inlet position at the bottom of the pump body 1 .

[0048] During operation, when the driving shaft 15 moves upward, it drives the pull rod 106 at the bottom to move upward. When the pull rod 106 moves upward, with the cooperation of the linkage rod 110, the telescopic arc plate 109 can be pushed into the fan-shaped plate groove 112, thereby expanding the feed port area at the bottom of the pump body 1, freeing up space for blockages, alleviating internal extrusion, and facilitating the entry of materials into the pump body 1, thereby preventing blockages from blocking the feed port at the bottom of the pump body 1 and affecting its use.

[0049] At the same time, multiple linkage rods 110 are provided to assist in forming a filter port at the bottom of the pump body 1, thereby reducing the risk of large objects entering the pump body and better maintaining the operation of the pump machine.

[0050] See also Figure 3-8 As shown, a stator 9 is fixed on the inner wall of the motor housing 4, a rotor 8 is fixed on the outer side of the motor shaft 7, and the rotor 8 and the stator 9 are arranged at the same level.

[0051] The motor shaft 7 is a hollow shaft, and a second limit block 18 is provided on the bottom inner wall of the motor shaft 7. A second limit groove 172 is opened on the top of the drive shaft 15. The top end of the drive shaft 15 is inserted into the bottom inner wall of the motor shaft 7, and the second limit block 18 at the bottom of the motor shaft 7 is engaged and clamped in the second limit groove 172 at the top of the drive shaft 15.

[0052] A central shaft 10 is fixed to the top end of the driving shaft 15 , and the central shaft 10 is disposed in the central hole of the motor shaft 7 .

[0053] A limiting ring 16 is disposed at the top of the central shaft 10, and a first limiting groove 171 is formed on the limiting ring 16. A first limiting block 14 is fixed on the top inner wall of the motor shaft 7, and the first limiting block 14 is engaged and clamped in the first limiting groove 171 of the limiting block.

[0054] The bottom end of the motor housing 4 is provided with an axial hole, and the bottom end of the motor shaft 7 passes through the axial hole at the bottom of the protective cover 5 for rotatable installation. The contact surfaces of the motor housing 4 and the motor shaft 7 are respectively provided with sealing rubber rings on the upper and lower sides.

[0055] A connecting bearing 11 is provided at the top of the motor housing 4 with a mounting hole, in which the connecting bearing 11 is embedded, and the top end of the motor shaft 7 passes through the inner ring of the connecting bearing 11 .

[0056] During operation, in order to ensure the sealing effect of the motor shaft 7 , a sealing ring groove is provided at the installation position at the bottom of the motor shaft 7 , and a sealing rubber ring is provided in the sealing ring groove to ensure the sealing effect of the motor shaft 7 .

[0057] During operation, the rotor 8 and the stator 9 cooperate with each other to drive the motor shaft 7 to rotate. The rotation of the motor shaft 7 can drive the rotation of the bottom 15 .

[0058] In order to ensure the upward extension effect of the driving shaft 15, a limiting groove 17 is set at the top of the driving shaft 15, and a second limiting block 18 is set at the bottom of the motor shaft 7, which can cooperate with each other. Through the rotation of the motor shaft 7, the rotation effect of the driving shaft 15 can be driven, and at the same time, the upward extension effect of the driving shaft 15 will not be affected.

[0059] At the same time, a limit block is arranged on the central shaft 10 at the top of the driving shaft 15. With the cooperation of the first limit block 14, the synchronous rotation of the central shaft 10 and the motor shaft 7 is ensured to ensure the normal operation of the sewage pump.

[0060] See also Figure 5-7As shown, a rotating electrode 13 is fixed to the top of the central shaft 10, a hollow connecting electrode ring 12 is arranged inside the protective cover 5, the top of the central shaft 10 passes through the inside of the connecting electrode ring 12, the bottom side of the rotating electrode 13 is in contact and tangent to the top side of the connecting electrode ring 12, the connecting electrode ring 12 and the rotating electrode 13 are connected to the wires connected to the connecting terminal 6, and the start and stop power line of the motor is connected in series with the connecting electrode ring 12 and the rotating electrode 13. During operation, after the impeller 105 sucks in the blockage at the bottom, the position of the impeller 105 is lifted upward. When the impeller 105 moves upward, the drive shaft 15 can be pushed upward, thereby lifting the central shaft 10. When lifting, the rotating electrode 13 at the top of the central shaft 10 is separated from the connecting electrode ring 12, so that the motor can be powered off to avoid continuous power-on of the motor. Since the impeller 105 cannot move, it causes overall burning.

[0061] The top of the motor housing 4 is provided with an inscribed ring 2, and the protective cover 5 is buckled on the outside of the inscribed ring 2 on the top of the motor housing 4. The protective cover 5 and the inscribed ring 2 on the top of the motor housing 4 are fixedly connected by screws. When working, the inscribed ring on the top of the motor housing 4 and the protective cover 5 can be buckled up and down by misalignment, so as to ensure the sealing effect of the pump body. At the same time, the lateral fixation of the screws can reduce the looseness caused by the overall operation vibration of the pump machine, so as to better maintain the sealing effect of the pump body.

[0062] The submersible sewage pump of this embodiment is a submersible sewage pump, which can tear and cut long fibers, bags, belts, grass, cloth strips and other materials in sewage, and then discharge them smoothly. It is particularly suitable for conveying liquids containing hard solids, fibers and particularly dirty, sticky and slippery liquids.

[0063] During the sewage discharge process, with the cooperation of the hollow support, the sewage pump is placed on the bottom of the water. After power is turned on, the stator 9 is powered on and with the cooperation of the rotor 8, the motor shaft 7 can be driven to rotate.

[0064] With the rotation of the motor shaft 7, the drive shaft 15 can be driven to rotate. When the drive shaft 15 rotates, the impeller 105 at the bottom of the drive shaft 15 is driven to rotate. During the rotation of the impeller 105, impurities such as silt 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.

[0065] Since the impeller 105 is an inverted cone structure that is larger at the top and smaller at the bottom, and has a fan-shaped surface with a certain curvature, when adsorbed matter appears to clog the pump body 1, or when the impeller 105 in the pump body 1 is stuck, under the continuous driving operation of the impeller 105, the impeller 105 can push the drive shaft 15 to move upward, thereby compressing the spring 101. When the impeller 105 moves upward, the space in the pump body 1 can be released to allow the stuck object to pass through. At the same time, there is a buffer space for the impeller 105, which reduces the breakage and damage of the impeller 105 and can better protect the impeller 105.

[0066] After the impeller 105 sucks in the blockage due to the bottom, the position of the impeller 105 is lifted upward. When the impeller 105 moves upward, the drive shaft 15 can be pushed upward, thereby lifting the central shaft 10. When lifting, the rotating electrode 13 on the top of the central shaft 10 is separated from the connecting electrode ring 12, which can cut off the power of the motor and prevent the motor from being continuously powered on. Since the impeller 105 cannot move, it will cause overall burning.

[0067] When a blockage is stuck between the impeller 105 and the pump body 1 , the impeller 105 rises to cut off the power supply to the motor, which can firstly protect the internal structure of the motor and reduce the breakage of the impeller 105 .

[0068] When blockage occurs, when the drive shaft 15 moves upward, it drives the pull rod 106 at the bottom to move upward. When the pull rod 106 moves upward, with the cooperation of the linkage rod 110, the telescopic arc plate 109 can be pushed into the fan-shaped plate groove 112, thereby expanding the feed port area at the bottom of the pump body 1. This can free up space for the blockage, reduce internal extrusion, and facilitate the entry of materials into the pump body 1, thereby preventing the blockage from blocking the feed port at the bottom of the pump body 1 and affecting its use.

[0069] At the same time, multiple linkage rods 110 are provided to assist in forming a filter port at the bottom of the pump body 1, thereby reducing the risk of large objects entering the pump body and better maintaining the operation of the pump machine.

[0070] If a blockage occurs in the pump body 1 and the entire pump stops operating, the bottom end of the pull rod 106 can be manually pressed to squeeze the drive shaft 15 upward, so as to better release the blockage and more conveniently maintain the normal operation of the pump.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A permanent magnet high-efficiency submersible sewage pump, characterized in that: It comprises a pump body (1), a motor housing (4), a motor shaft (7), a drive shaft (15), a lifting isolation plate (104), a pull rod (106), and a telescopic arc plate (109), wherein: A stator (9) is fixed on the inner wall of the motor housing (4), a rotor (8) is fixed on the outer side of the motor shaft (7), and the rotor (8) and the stator (9) are arranged at the same level; One end of the drive shaft (15) is arranged outside the pump body (1), and the other end is arranged inside the pump body (1), and the drive shaft (15) is slidably connected to the pump body (1) up and down, and the drive shaft (15) is drivingly connected to the motor shaft (7); the lifting isolation disk (104) is sleeved on the drive shaft (15) through a bearing, and an impeller (105) is arranged below the drive shaft (15); a spring (101) is fixedly connected between the lifting isolation disk (104) and the top inner wall of the pump body (1); The pull rod (106) is arranged at the bottom end of the drive shaft (15), and the pull rod (106) is located below the impeller (105); the bottom end of the pull rod (106) is rotatably mounted on a limit sleeve (111) through a bearing, and the limit sleeve (111) is provided with a connecting seat 1; a fan-shaped plate groove (112) is opened at the bottom of the pump body (1), 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 2, and a linkage rod (110) is connected between the connecting seat 1 and the connecting seat 2.

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

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

4. According to claim 3, the permanent magnet high-efficiency submersible sewage pump is characterized in that: The motor housing (4) is arranged above the pump body (1); a connecting tube (3) is arranged at the bottom of the motor housing (4); an inscribed ring 1 is arranged at the top side of the pump body (1); and the bottom of the connecting tube (3) is buckled onto the inscribed ring 1 at the top of the pump body (1).

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

6. The permanent magnet high-efficiency submersible sewage pump according to claim 5 is characterized in that: The bottom end of the motor housing (4) is provided with an axial hole, the bottom end of the motor shaft (7) passes through the axial hole at the bottom of the protective cover (5) for rotatable installation, and sealing rubber rings are respectively provided on the upper and lower 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 is characterized in that: The top of the motor housing (4) is provided with a mounting hole, in which a connecting bearing (11) is embedded, and 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 is characterized in that: The top of the pump body (1) is provided with a rotating hole, the drive shaft (15) is rotatably arranged in the rotating hole, a gasket (103) is sleeved on the middle part of the drive shaft (15), and a spring (101) is fixedly connected between the gasket (103) and the top inner wall of the pump body (1).

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

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

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