Submersible pump capable of preventing sludge blockage

Abstract

The submersible pump comprises a pump shell and a filtering cover shell, a water inlet is formed in the pump shell, a mounting base is arranged on the pump shell, a water inlet is formed in the mounting base, a water inlet flow channel and a water outlet flow channel are formed in the mounting base, a first sludge intercepting filter screen is arranged on the mounting base, and a water passing channel is formed in the inner wall of the water inlet flow channel; a containing cavity is formed in the inner wall, close to the water inlet, of the water passing channel, a through hole is formed in the inner wall, close to the water inlet flow channel, of the containing cavity, and a second sludge intercepting filter screen is further arranged on the mounting base. Sludge is intercepted in the water inlet flow channel through the first sludge intercepting filter screen, so that the situation that the sludge enters the pump shell is reduced, the service life of the submersible pump is prolonged, through arrangement of the water passing channel, the containing cavity and the second sludge intercepting filter screen, the sludge can be collected in the containing cavity, and the situation that the first sludge intercepting filter screen is blocked for the second time is reduced; the durability of the sludge intercepting effect of the sludge intercepting filter screen I is favorably improved.

Description

Technical Field

[0001] The present application relates to the field of submersible pumps, and in particular to a submersible pump that is resistant to silt clogging. Background Art

[0002] Submersible pump is a very important groundwater extraction equipment. When in use, the whole unit submerges into the water to extract groundwater to the surface. It is suitable for domestic water use, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading and other fields.

[0003] For example, the utility model patent with patent announcement number CN213870336U discloses a submersible pump, including a pump body, a conductive wire connected to the pump body, a positioning groove provided on the outer side of the pump body for the conductive wire to pass through, and a pressure plate provided on the pump body, which presses against the outer side of the conductive wire and presses the conductive wire against the positioning groove, thereby improving the situation in which the conductive wire of the submersible pump is easy to fall off and making the overall use safer.

[0004] When using the above-mentioned submersible pump, a filter cover is usually provided on the water inlet of the submersible pump to filter out debris, but the holes of the filter cover are usually set larger, and can only filter some large particles of debris in a targeted manner. The submersible pump needs to be immersed in water for a long time to work. During use, the silt in the water will pass through the holes of the filter cover and enter the inside of the submersible pump casing with the water flow, causing wear on the pump chamber and rotor of the submersible pump. In severe cases, the motor will be burned out, shortening the service life of the submersible pump, and needs to be improved. Summary of the invention

[0005] In order to improve the problem that during the use of the submersible pump, silt in the water may enter the inside of the pump casing of the submersible pump and shorten the service life of the submersible pump, the present application provides a submersible pump that is resistant to silt clogging.

[0006] The present application provides a submersible pump that prevents silt clogging, which adopts the following technical solution: A submersible pump to prevent silt clogging, comprising a pump housing and a filter housing arranged on the pump housing, wherein a water inlet is provided on the pump housing, and the filter housing covers the water inlet, a mounting seat is provided on the pump housing, and the mounting seat is located between the filter housing and the water inlet, a water inlet is provided on the mounting seat, and a water inlet flow channel and a water outlet flow channel are provided in the mounting seat, the water inlet flow channel is connected to the water inlet, and the water outlet flow channel connects the water inlet flow channel and the water inlet, and a silt interception filter screen 1 is provided on the mounting seat, and the silt interception filter screen 1 is located in the water inlet flow channel and covers the water outlet flow channel; A water passage is provided on the inner wall of the water inlet channel, and the water passage is located at an end of the water inlet channel away from the water inlet. A accommodating cavity is provided on the inner wall of the water passage close to the water inlet, and a through hole is provided on the inner wall of the accommodating cavity close to the water inlet channel. A sludge intercepting filter screen 2 is also provided on the mounting seat, and the sludge intercepting filter screen 2 is located in and covers the through hole.

[0007] By adopting the above technical scheme, when water carrying silt enters the filter housing, the water and silt enter the water inlet, and the silt is intercepted in the water inlet channel by the silt interception filter 1, thereby reducing the silt from entering the pump housing, thereby reducing the damage to the pump chamber and motor of the submersible pump, which is beneficial to extending the service life of the submersible pump. When the silt interception filter 1 is blocked, the water flow entering from the water inlet will flush the silt on the silt interception filter 1 and flush the silt to the water passage, and finally be collected in the containing chamber under the interception effect of the silt interception filter 2, thereby reducing the secondary blockage of the silt interception filter 1, and is beneficial to improving the durability of the silt interception filter 1 in intercepting silt.

[0008] Optionally, the silt interception filter screen 1 is inclined inwardly toward the direction close to the water inlet, the mounting seat includes a seat body and a slider slidably connected to the seat body, the water inlet is formed by splicing the seat body and the slider, the water inlet flow channel and the water outlet flow channel are both arranged on the seat body, the slider slides close to or away from the silt interception filter screen 1, and an inclined surface is provided on the slider, the inclined surface is located on a side of the slider close to the silt interception filter screen 1 and is parallel to the silt interception filter screen 1, and the inner wall of the water inlet flow channel is arranged in contact with the inclined surface; A piston cavity is provided in the seat body, and the sludge intercepting filter screen 1 includes a filter screen fixed on the seat body at one end, a connecting block arranged at the other end of the filter screen and an elastic member 1 arranged on the connecting block. A piston 1 is provided on the connecting block, and the piston 1 is located in the piston cavity. The elastic member 1 tightens the seat body so that the connecting block has a tendency to approach the piston cavity. A piston 2 is provided on the slider, and the piston 2 is located on the side of the slider away from the inclined surface and in the piston cavity.

[0009] By adopting the above technical scheme, part of the silt will be stuck in the holes on the silt interception filter screen 1 under the impact of the water flow. When more and more silt is retained on the silt interception filter screen 1, the pressure on the silt interception filter screen 1 will be greater and greater under the impact of the water flow. At this time, the silt interception filter screen 1 is deformed and drives the connecting block to move closer to the water outlet channel. The connecting block drives the piston 1 to move, so that the air pressure in the piston chamber becomes smaller, and then drives the piston 2 and the slider to move away from the silt interception filter screen 1, so that a water inlet that is nearly parallel to the surface of the silt interception filter screen 1 is formed between the slider and the silt interception filter screen 1. The water flow is guided through the above water inlet, so that the water flow is nearly parallel to the surface of the silt interception filter screen 1 to flush the silt interception filter screen 1, thereby reducing the angle formed between the water flow inflow direction and the surface of the silt interception filter screen 1, which helps to flush away the silt stuck in the holes of the silt interception filter screen 1, realize self-regulation of the water flow inflow direction, and further improve the durability of the silt interception filter screen 1 in intercepting silt.

[0010] Optionally, a partition plate is hinged on the seat body, and the partition plate is located in the water inlet channel and on the side of the silt intercepting filter screen away from the water inlet. An elastic member 2 is provided on the hinge axis of the partition plate, and the elastic member 2 presses against the seat body so that the partition plate tends to approach the water inlet and presses against the inner wall of the water inlet channel to cut off the water inlet channel, and the distance between the partition plate and the inner wall of the water inlet channel gradually increases in the direction away from the water inlet.

[0011] By adopting the above technical solution, when the water flow carries silt toward the water flow channel, the water flow impacts the partition plate and pushes the partition plate to move away from the water inlet, so that a gap is generated between the partition plate and the inner wall of the water inlet channel. The water flow carries the silt into the water flow channel through the above gap. When the submersible pump stops working, the partition plate, under the action of the elastic member 2, presses against the inner wall of the water inlet channel again, cutting off the water inlet channel, thereby reducing the water flow in the water flow channel from carrying the silt out of the containing chamber, so as to facilitate the subsequent centralized cleaning of the silt in the seat body.

[0012] Optionally, the seat body includes a main body, a moving block and a baffle slidably connected to the main body, the accommodating chamber, the water inlet flow channel, the water outlet flow channel and the slider are arranged on the main body, the moving block is located on a side of the accommodating chamber away from the water passage and slides close to or away from the slider, the baffle is located on a side of the sludge intercepting filter screen 2 away from the accommodating chamber and is lifted and slid on the main body, a mud outlet hole is opened on the main body, the mud outlet hole is connected to the accommodating chamber, and the moving block is used to cover the mud outlet hole; When the moving block covers the mud outlet hole, the baffle plate abuts against one end of the moving block close to the slider; when the moving block is staggered with the mud outlet hole, the mud outlet hole is located on the side of the moving block away from the slider, and the baffle plate is located on the side of the moving block close to the accommodating cavity.

[0013] By adopting the above technical solution, when it is necessary to clean the sludge in the accommodating chamber, the baffle is moved up so that the baffle and the moving block are staggered, and then the moving block is moved close to the slider to expose the mud outlet hole. At this time, the accommodating chamber can be rinsed with water to clean the sludge in the accommodating chamber. When the cleaning is completed, the moving block is moved away from the slider to abut the main body. At this time, the moving block covers the mud outlet hole, and the baffle moves down under the action of gravity and abuts against the end of the moving block close to the slider to limit the moving block.

[0014] Optionally, when the baffle is located on a side of the moving block close to the accommodating chamber, the baffle fits the sludge intercepting filter screen 2.

[0015] By adopting the above technical solution, when water is used to flush the sludge on the sludge interception filter screen 2, the water impacts the baffle and splashes, and the splashed water performs a secondary flushing on the inner wall of the containing cavity around the sludge interception filter screen 2, so that the sludge can be cleaned with less water, which is beneficial to reduce the loss of cleaning water and save water resources.

[0016] Optionally, a column is provided on the main body for lifting and sliding, and a guide surface is provided at the lower end of the column, the guide surface is located on the side of the column away from the slider and is inclined downward towards the direction close to the slider, a boss is provided on the moving block, the boss is located on the side of the guide surface away from the slider, the boss is used to abut the guide surface, a protrusion is provided on the column, a connecting column is rotatably connected to the main body, the connecting column is located in the accommodating cavity, a threaded groove is opened on the connecting column, the column is located in the threaded groove, the protrusion is stuck in the thread on the threaded groove, and a plurality of stirring rods are distributed circumferentially on the connecting column.

[0017] By adopting the above technical solution, when the moving block moves close to the slider, the protrusion abuts the guide surface to push the column upward, the column drives the protrusion to move, and the protrusion abuts the thread in the thread groove to drive the connecting column to rotate, so that the stirring rod stirs the sludge in the accommodating chamber, making the sludge inside loose, so that the sludge in the accommodating chamber can be flushed away with water later.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. The silt interception filter 1 is used to intercept the silt in the water inlet flow channel, thereby reducing the silt from entering the pump casing, which is beneficial to extending the service life of the submersible pump. The silt can be collected in the accommodating chamber through the arrangement of the water passage, the accommodating chamber and the silt interception filter 2, thereby reducing the situation where the silt interception filter 1 is blocked twice, which is beneficial to improving the durability of the silt interception filter 1 in intercepting silt; 2. It can realize the self-adjustment of the water flow direction, further improving the durability of the silt interception filter to intercept silt; 3. When the moving block is moved to clean the sludge in the containing chamber, the stirring rod stirs the sludge in the containing chamber through the cooperation between the convex column, the column and the connecting column, so that the sludge inside becomes loose, so as to facilitate the subsequent flushing of the sludge in the containing chamber with water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of an embodiment of the present application.

[0020] Figure 2 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the water inlet.

[0021] Figure 3 This is a structural diagram of an embodiment of the present application partially cut away at the mounting seat, mainly showing the structure of the water inlet.

[0022] Figure 4 for Figure 3 The enlarged view of part A in the middle mainly shows the structure of the water inlet and outlet channels.

[0023] Figure 5 This is a structural diagram of an embodiment of the present application partially cut away at the mounting seat and piston 2, mainly showing the structure of piston 2 and the piston chamber.

[0024] Figure 6 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the slider.

[0025] Figure 7 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the sludge interception filter one.

[0026] Figure 8 This is a structural diagram of a partial section of the mounting seat and the silt intercepting filter of the embodiment of the present application, mainly showing the connection structure between the elastic member 1 and the main body.

[0027] Fig. 9 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the second elastic member.

[0028] Fig.10 This is a structural diagram of an embodiment of the present application partially cut away from the middle, mainly showing the structure of the mud hole.

[0029] Fig.11 This is a structural diagram of an embodiment of the present application partially cut away from the middle, mainly showing the structure of the protrusion and the thread groove.

[0030] Description of reference numerals: 1, pump housing; 11, water inlet; 2, filter housing; 3, mounting seat; 31, seat body; 311, main body; 312, moving block; 313, baffle; 32, slider; 321, moving part; 322, extension part; 4, water inlet; 5, piston 2; 6, water inlet channel; 7, water outlet channel; 8, piston chamber; 9, sludge interception filter screen 1; 91, filter screen; 92, connecting block; 921, connecting part; 922, Extension portion; 93, elastic member 1; 10, piston 1; 12, inclined surface; 13, partition plate; 14, elastic member 2; 15, water passage; 16, accommodating chamber; 17, sludge intercepting filter 2; 18, mud outlet hole; 19, boss; 20, column; 201, movable portion; 202, limiting portion; 203, transmission portion; 21, guide surface; 22, limiting chamber; 23, boss; 24, connecting column; 241, threaded groove; 25, stirring rod. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-11 This application is described in further detail.

[0032] The present application discloses a submersible pump that prevents silt clogging. Figure 1-3 The anti-silt clogging submersible pump includes a pump casing 1 and a filter casing 2 installed on the pump casing 1. A water inlet 11 is opened on the pump casing 1. The filter casing 2 is located on a side of the pump casing 1 close to the water inlet 11 and covers the water inlet 11.

[0033] See also Figure 2-6 A mounting seat 3 is fixed on the pump housing 1, and the mounting seat 3 is located between the filter housing 2 and the water inlet 11. The mounting seat 3 includes a seat body 31 and a slider 32. The seat body 31 includes a main body 311, a moving block 312 and a baffle 313. The main body 311 is fixed on the pump body. A mounting groove is provided on the lower end surface of the main body 311. The slider 32 is located in the mounting groove. The slider 32 includes a moving portion 321 and two extending portions 322. The moving portion 321 is horizontally slidably connected to the mounting groove, and the two outer side walls of the moving portion 321 parallel to its sliding direction are attached to the inner wall of the mounting groove. The moving portion 321 and the main body 311 are spliced ​​to form a water inlet 4. The two extending portions 322 are fixed to the same side of the moving portion 321 and are arranged at intervals. A piston 5 is fixed to the end of each extending portion 322 away from the moving portion 321.

[0034] See also Figure 2-6A water inlet channel 6 and a water outlet channel 7 are provided in the main body 311. The water inlet channel 6 is connected to the water inlet 4. The water outlet channel 7 is connected to the water inlet channel 6 and the water inlet 11. A piston cavity 8 is provided in the main body 311. The extension portion 322 passes through the main body 311 and extends into the piston cavity 8. The piston 2 5 is located in the piston cavity 8, and the outer peripheral wall of the piston 2 5 fits the inner peripheral wall of the piston cavity 8.

[0035] See also Figure 2-6 A silt intercepting filter screen 9 is provided on the main body 311. The silt intercepting filter screen 9 is located in the water inlet channel 6 and on the side of the moving part 321 away from the protruding part 322. The moving part 321 moves closer to or away from the silt intercepting filter screen 9. The silt intercepting filter screen 9 includes a filter screen 91, a connecting block 92 and two elastic members 93. The filter screen 91 is inclined inward toward the direction close to the water inlet 11. The end of the filter screen 91 away from the water inlet 11 is fixedly connected to the main body 311, and the filter screen 91 covers the water outlet channel 7.

[0036] See also Figure 3-6 The connecting block 92 includes a connecting portion 921 and an extending portion 922. The connecting portion 921 is fixed to the other end of the filter screen 91, where the other end refers to the end away from the connection between the filter screen 91 and the main body 311. The extending portion 922 is fixed to the side of the connecting portion 921 away from the filter screen 91. The extending portion 922 passes through the main body 311 and extends into the piston cavity 8. A piston 10 is fixed to the end of the extending portion 922 away from the connecting portion 921. The piston 10 is located in the piston cavity 8, and the outer peripheral wall of the piston 10 fits the inner peripheral wall of the piston cavity 8.

[0037] See also Figure 3-8 The two elastic members 93 are fixed to the side of the connecting portion 921 away from the filter screen 91 and are arranged at intervals. The extension portion 922 is located between the two elastic members 93. Grooves are provided on the main body 311. The number and position of the grooves correspond to the number and position of the elastic members 93. Each elastic member 93 is located in the corresponding groove, and the end of the elastic member 93 away from the connecting portion 921 is fixedly connected to the main body 311. The elastic member 93 tightens the main body 311, so that the connecting portion 921 has a tendency to approach the piston chamber 8. In this embodiment, the elastic member 93 is a spring.

[0038] See also Figure 3-8 The outer wall of the moving part 321 is processed to form an inclined surface 12 , which is located on the side of the moving part 321 away from the extending part 322 and parallel to the filter screen 91 , and the inner wall of the water inlet channel 6 is arranged in contact with the inclined surface 12 .

[0039] In actual use, when more and more silt is retained on the filter screen 91, the pressure on the filter screen 91 will become greater and greater under the impact of the water flow. At this time, the filter screen 91 is deformed and drives the connecting part 921 and the extension part 922 to move closer to the water outlet channel. The extension part 922 drives the piston 10 to move, so that the air pressure in the piston chamber 8 becomes smaller, and then drives the piston 2 5, the extension part 322 and the moving part 321 to move away from the filter screen 91, so that a water inlet 4 is formed between the moving part 321 and the filter screen 91, which is close to the surface of the filter screen 91. The water flow is guided by the above-mentioned water inlet 4, so that the water flow is close to parallel to the surface of the filter screen 91 to flush the filter screen 91, thereby reducing the angle formed between the water flow inflow direction and the surface of the filter screen 91, which helps to flush away the silt stuck in the holes of the filter screen 91 and realize self-regulation of the water flow inflow direction.

[0040] See also Figure 3-9 A partition plate 13 is hinged on the main body 311. The partition plate 13 is located in the water inlet channel 6 and on the side of the filter screen 91 away from the water inlet 4. The hinge axis of the partition plate 13 is horizontally arranged and perpendicular to the sliding direction of the moving part 321. An elastic member 2 14 is installed on the hinge shaft of the partition plate 13. The elastic member 2 14 presses against the main body 311, so that the partition plate 13 has a tendency to approach the water inlet 4, and presses against the inner wall of the water inlet channel 6 to cut off the water inlet channel 6. The distance between the end of the partition plate 13 away from the hinge axis and the inner wall of the water inlet channel 6 gradually increases in the direction away from the water inlet 4. In this embodiment, the elastic member 2 14 is a torsion spring.

[0041] See also Figure 3-9 A water passage 15 is provided on the inner wall of the water inlet channel 6. The water passage 15 is located at one end of the water inlet channel 6 away from the water inlet 4 and at the side of the water inlet channel 6 away from the water outlet channel 7. A receiving chamber 16 is provided on the inner wall of the water passage 15 close to the water inlet 4. A through hole is provided on the inner wall of the receiving chamber 16 close to the water inlet channel 6. A sludge intercepting filter screen 17 is also fixed on the main body 311. The sludge intercepting filter screen 17 is located in the through hole and is vertically arranged, and the sludge intercepting filter screen 17 covers the through hole.

[0042] See also Figure 3-10 A mud outlet hole 18 is provided on the main body 311, and the mud outlet hole 18 is located on the side of the accommodating chamber 16 away from the water passage 15 and is connected to the accommodating chamber 16. The moving block 312 is located on the side of the accommodating chamber 16 away from the water passage 15 and on the side of the moving part 321 away from the filter screen 91, and the moving block 312 slides horizontally close to or away from the moving part 321. The moving block 312 is used to cover the mud outlet hole 18. A boss 19 is fixed on the moving block 312, and the boss 19 is located on the side of the moving block 312 close to the accommodating chamber 16. The baffle 313 is located on the side of the silt intercepting filter screen 17 away from the accommodating chamber 16 and is lifted and slid on the main body 311.

[0043] When the moving block 312 covers the mud outlet hole 18, the baffle 313 abuts against one end of the moving block 312 close to the slider 32. When the moving block 312 is offset from the mud outlet hole 18, the mud outlet hole 18 is located on the side of the moving block 312 away from the moving part 321, and the baffle 313 is located on the side of the moving block 312 close to the accommodating chamber 16 and fits the silt intercepting filter screen 17.

[0044] See also Figure 3-11 A column 20 is provided on the main body 311 for lifting and sliding movement. The column 20 is located in the accommodating cavity 16. The column 20 includes a movable part 201, a limiting part 202 and a transmission part 203. The movable part 201 is located on the side of the boss 19 close to the moving part 321. The cross section of the movable part 201 cut along the horizontal direction is rectangular. A guide surface 21 is formed at the lower end of the movable part 201. The guide surface 21 is located on the side of the column 20 away from the moving part 321 and is inclined downward in the direction close to the moving part 321. The boss 19 is used to abut the guide surface 21. When the moving block 312 is staggered from the mud outlet hole 18, the boss 19 abuts against the lower end of the movable part 201.

[0045] See also Figure 3-11 The limiting part 202 is fixed to one side of the movable part 201 along the horizontal direction. A limiting cavity 22 is opened in the main body 311. The limiting part 202 is located in the limiting cavity 22. The inner wall of the limiting cavity 22 abuts against the limiting part 202, thereby limiting the movement range of the movable part 201. The transmission part 203 is fixed to the upper end of the movable part 201. The transmission part 203 is cylindrical and a protrusion 23 is fixed on the transmission part 203.

[0046] See also Figure 3-11 A connecting column 24 is rotatably connected to the main body 311, and the connecting column 24 is located in the accommodating chamber 16, and the rotation axis of the connecting column 24 is vertically arranged. A plurality of stirring rods 25 are fixed on the outer peripheral wall of the connecting column 24, and the plurality of stirring rods 25 are evenly spaced around the outer periphery of the connecting column 24 and are spaced along the axial direction of the connecting column 24. A threaded groove 241 is provided on the lower end surface of the connecting column 24, and the transmission part 203 is located in the threaded groove 241, and the protrusion 23 is stuck in the thread on the threaded groove 241.

[0047] In actual use, when it is necessary to clean the sludge in the accommodating chamber 16, the baffle 313 is moved up so that the baffle 313 and the moving block 312 are staggered, and then the moving block 312 is moved close to the moving part 321 to expose the mud outlet hole 18. During the movement, the boss 19 abuts the guide surface 21 to push the column 20 to move up, and the column 20 drives the protrusion 23 to move. The protrusion 23 abuts the thread in the thread groove 241 to drive the connecting column 24 to rotate, so that the stirring rod 25 stirs the sludge in the accommodating chamber 16 to make the sludge inside loose. At this time, the accommodating chamber 16 can be flushed with water to clean the sludge in the accommodating chamber 16. When water hits the baffle 313, splashing occurs. The splashing water performs secondary flushing on the inner wall of the accommodating chamber 16 around the sludge intercepting filter screen 17, so that the sludge can be cleaned with less water, which is beneficial to reduce the loss of cleaning water and save water resources.

[0048] When cleaning is completed, the moving block 312 is moved away from the moving part 321 to abut the main body 311. At this time, the moving block 312 covers the mud outlet hole 18, and the baffle 313 moves downward under the action of gravity and abuts against one end of the moving block 312 close to the moving part 321 to limit the moving block 312. The column 20 moves downward and resets under the action of gravity.

[0049] The implementation principle of a submersible pump to prevent silt blockage in the embodiment of the present application is: When water carrying silt enters the filter housing 2, the water and silt enter the water inlet 4, and the silt is retained in the water inlet channel 6 by the filter net 91, thereby reducing the silt from entering the pump housing 1 and causing damage to the pump chamber and motor of the submersible pump, which is beneficial to extending the service life of the submersible pump.

[0050] When the filter screen 91 is blocked, the water flow entering from the water inlet 4 will flush the silt on the filter screen 91 and flush the silt to the water passage 15. The water flow hits the partition plate 13 and pushes the partition plate 13 to move away from the water inlet 4, so that a gap is generated between the partition plate 13 and the inner wall of the water inlet channel. The water flow carries the silt into the water passage 15 through the above-mentioned gap, and is finally collected in the accommodating chamber 16 under the interception effect of the silt interception filter screen 17, thereby reducing the situation of the filter screen 91 being blocked for the second time and helping to improve the durability of the silt interception filter screen 19 in intercepting silt.

[0051] When the submersible pump stops working, the partition plate 13 is pressed against the inner wall of the water inlet channel 6 again under the action of the elastic member 14, cutting off the water inlet channel 6, which can reduce the water flow in the water passage 15 to bring the sludge out of the accommodating chamber 16, so as to facilitate the subsequent centralized cleaning of the sludge in the main body 311.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A submersible pump for preventing silt clogging, comprising a pump housing (1) and a filter housing (2) arranged on the pump housing (1), wherein the pump housing (1) is provided with a water inlet (11), and the filter housing (2) covers the water inlet (11), characterized in that: The pump housing (1) is provided with a mounting seat (3), the mounting seat (3) is located between the filter housing (2) and the water inlet (11), the mounting seat (3) is provided with a water inlet (4), the mounting seat (3) is provided with a water inlet channel (6) and a water outlet channel (7), the water inlet channel (6) is connected to the water inlet (4), the water outlet channel (7) is connected to the water inlet channel (6) and the water inlet (11), the mounting seat (3) is provided with a sludge intercepting filter screen (9), the sludge intercepting filter screen (9) is located in the water inlet channel (6) and covers the water outlet channel (7); A water passage (15) is provided on the inner wall of the water inlet channel (6), the water passage (15) being located at an end of the water inlet channel (6) away from the water inlet (4), a receiving cavity (16) is provided on the inner wall of the water passage (15) close to the water inlet (4), a through hole is provided on the inner wall of the receiving cavity (16) close to the water inlet channel (6), and a sludge intercepting filter screen (17) is also provided on the mounting seat (3), the sludge intercepting filter screen (17) being located in the through hole and covering the through hole.

2. The anti-sludge clogging submersible pump according to claim 1, characterized in that: The sludge intercepting filter screen (9) is inclined inwardly toward the direction close to the water inlet (11); the mounting seat (3) comprises a seat body (31) and a slider (32) slidably connected to the seat body (31); the water inlet (4) is formed by splicing the seat body (31) and the slider (32); the water inlet channel (6) and the water outlet channel (7) are both arranged on the seat body (31); the slider (32) slides close to or away from the sludge intercepting filter screen (9); an inclined surface (12) is arranged on the slider (32); the inclined surface (12) is located on a side of the slider (32) close to the sludge intercepting filter screen (9) and is parallel to the sludge intercepting filter screen (9); the inner wall of the water inlet channel (6) is arranged to fit the inclined surface (12); A piston cavity (8) is provided in the seat body (31); the sludge intercepting filter screen (9) comprises a filter screen (91) fixed at one end to the seat body (31), a connecting block (92) arranged at the other end of the filter screen (91), and an elastic member (93) arranged on the connecting block (92); a piston (10) is provided on the connecting block (92); the piston (10) is located in the piston cavity (8); the elastic member (93) tightens the seat body (31) so that the connecting block (92) has a tendency to approach the piston cavity (8); a piston (5) is provided on the slider (32); the piston (5) is located on a side of the slider (32) away from the inclined surface (12) and is located in the piston cavity (8).

3. The anti-sludge clogging submersible pump according to claim 2, characterized in that: A partition plate (13) is hingedly connected to the seat body (31). The partition plate (13) is located in the water inlet channel (6) and on the side of the sludge intercepting filter screen (9) away from the water inlet (4). An elastic member (14) is provided on the hinge axis of the partition plate (13). The elastic member (14) is pressed against the seat body (31) so that the partition plate (13) has a tendency to approach the water inlet (4) and presses against the inner wall of the water inlet channel (6) to cut off the water inlet channel (6). The distance between the partition plate (13) and the inner wall of the water inlet channel (6) gradually increases in the direction away from the water inlet (4).

4. The anti-sludge clogging submersible pump according to claim 3, characterized in that: The seat body (31) comprises a main body (311), a moving block (312) and a baffle (313) slidably connected to the main body (311); the accommodating chamber (16), the water inlet channel (6), the water outlet channel (7) and the slider (32) are arranged on the main body (311); the moving block (312) is located on a side of the accommodating chamber (16) away from the water passage (15) and slides close to or away from the slider (32); the baffle (313) is located on a side of the sludge intercepting filter screen 2 (17) away from the accommodating chamber (16) and is lifted and slid on the main body (311); a mud outlet hole (18) is opened on the main body (311); the mud outlet hole (18) is communicated with the accommodating chamber (16); and the moving block (312) is used to cover the mud outlet hole (18); When the moving block (312) covers the mud outlet hole (18), the baffle (313) abuts against one end of the moving block (312) close to the sliding block (32); when the moving block (312) and the mud outlet hole (18) are offset, the mud outlet hole (18) is located on a side of the moving block (312) away from the sliding block (32), and the baffle (313) is located on a side of the moving block (312) close to the accommodating cavity (16).

5. The anti-sludge clogging submersible pump according to claim 4, characterized in that: When the baffle (313) is located on a side of the moving block (312) close to the accommodating chamber (16), the baffle (313) fits the sludge intercepting filter screen 2 (17).

6. The anti-sludge clogging submersible pump according to claim 4, characterized in that: A column (20) is provided on the main body (311) for lifting and sliding movement. A guide surface (21) is provided at the lower end of the column (20). The guide surface (21) is located on a side of the column (20) away from the slider (32) and is inclined downward in a direction close to the slider (32). A convex column (19) is provided on the moving block (312). The convex column (19) is located on a side of the guide surface (21) away from the slider (32). The convex column (19) is used to abut against the guide surface. (21), a protrusion (23) is provided on the column (20), a connecting column (24) is rotatably connected to the main body (311), the connecting column (24) is located in the accommodating cavity (16), a thread groove (241) is provided on the connecting column (24), the column (20) is located in the thread groove (241), the protrusion (23) is inserted into the thread on the thread groove (241), and a plurality of stirring rods (25) are distributed circumferentially on the connecting column (24).

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