A filter device for submersible oil pump

Abstract

The present invention relates to the technical field of submersible oil pumps, and discloses a filtering device for a submersible oil pump, comprising a submersible oil pump body, wherein the top of the submersible oil pump body is connected to a delivery pipe, one side of the delivery pipe is connected to an oil outlet pipe, the bottom of the submersible oil pump body is connected to a liquid inlet pipe, the outer side of the liquid inlet pipe is embedded with a first filter screen, the inside of the submersible oil pump body is rotatably connected to an impeller, the inside of the impeller is fixedly connected to a connecting wheel shaft, the bottom of the connecting wheel shaft is fixedly connected to a reducer, and the bottom of the reducer is fixedly connected to a connecting column, thereby solving the problem that the filter at the oil inlet of the existing submersible oil pump will be clogged with impurities after long-term use, and the clogged filter will increase the resistance when the oil passes through the filter, resulting in a reduction in the oil flow entering the submersible oil pump, and the reduction in flow will affect the oil delivery capacity of the submersible oil pump, so that the amount of oil delivered per unit time decreases, thereby affecting the operating efficiency of the entire system.

Description

Technical Field

[0001] The invention relates to the technical field of submersible pumps, in particular to a filtering device for submersible pumps. Background Art

[0002] Submersible pump is a multistage centrifugal pump, mainly composed of pump shaft, impeller, guide casing, pump casing, etc., which can adapt to different types of oil wells or oil tanks. According to its main use, submersible pumps can be roughly divided into four types: submersible pumps for gas stations, high-flow and high-lift submersible pumps for oil depots (fueling ships), railway tank car (crane pipe) submersible pumps and flammable and explosive medium chemical explosion-proof submersible pumps. In order to ensure the normal operation of the submersible pump and the quality of the oil, a filter is usually installed at the oil inlet of the submersible pump. These filters can effectively intercept and remove impurities in the oil to ensure that the oil entering the submersible pump is relatively pure. The working principle of the submersible pump is: the submersible pump needs to ensure that it is fully wetted before starting, preferably completely immersed in the liquid. This is to ensure that the pump can smoothly extract the liquid during operation. After the submersible motor starts working, it will drive the shaft and impeller of the submersible pump to rotate rapidly. The function of the motor is to convert electrical energy into mechanical energy to provide power for the operation of the pump. Then the motor drives the impeller to rotate, and the liquid in the impeller flow channel is rotated continuously. Under the action of inertia, the liquid will be pumped from a low place to a high place or a distant place.

[0003] The filter at the oil inlet of the existing submersible oil pump will be clogged with impurities after long-term use. The clogged filter will increase the resistance when the oil passes through the filter, resulting in a decrease in the oil flow entering the submersible oil pump. The reduced flow will affect the oil delivery capacity of the submersible oil pump, resulting in a decrease in the amount of oil delivered per unit time, thereby affecting the operating efficiency of the entire system and making it inconvenient for users to use.

[0004] In view of this, the present invention provides a filtering device for a submersible pump to solve the technical problems existing in the above-mentioned prior art. Summary of the invention

[0005] The present invention discloses a filtering device for a submersible oil pump, which solves the problem mentioned in the above background technology that the filter at the oil inlet of the existing submersible oil pump will be clogged with impurities after long-term use. The clogged filter will increase the resistance when the oil passes through the filter, resulting in a decrease in the oil flow entering the submersible oil pump. The reduced flow will affect the oil delivery capacity of the submersible oil pump, resulting in a decrease in the amount of oil delivered per unit time, thereby affecting the operating efficiency of the entire system.

[0006] The present invention provides the following technical solution: a filtering device for a submersible oil pump, comprising a submersible oil pump body, the top of the submersible oil pump body is connected to a delivery pipe, one side of the delivery pipe is connected to an oil outlet pipe, the bottom of the submersible oil pump body is connected to a liquid inlet pipe, the outer side of the liquid inlet pipe is embedded with a first filter screen, the interior of the submersible oil pump body is rotatably connected to an impeller, the interior of the impeller is fixedly connected to a connecting wheel axle, the bottom of the connecting wheel axle is fixedly connected to a reducer, the bottom of the reducer is fixedly connected to a connecting column, the outer side of the connecting column is rotatably connected to a protective bottom plate, the interior of the protective bottom plate is embedded with a second filter screen, and the outer side of the connecting column is fixedly connected to a cleaning mechanism.

[0007] As an optional solution of the filtering device for the submersible pump described in the present invention, the cleaning mechanism includes a connecting frame, one side of the connecting frame is fixedly connected to a mounting plate, one side of the mounting plate is fixedly connected to a cleaning pad, and one side of the cleaning pad is in conflict with the first filter screen.

[0008] As an optional solution of the filtering device for the submersible pump described in the present invention, a fixing plate is fixedly connected to the inner side of the liquid inlet pipe, the top of the fixing plate is rotatably connected to the bottom of the mounting plate, and one side of the top of the fixing plate is rotatably connected to a reversing mechanism.

[0009] As an optional solution of the filtering device for the submersible oil pump described in the present invention, the reversing mechanism includes a transfer gear, one side of the transfer gear is meshedly connected with a transmission gear plate, the transmission gear plate is embedded in the bottom of one side of the mounting plate, and the other side of the transfer gear is meshedly connected with a transmission gear ring, and the bottom of the transmission gear ring is fixedly connected to the top of the protective bottom plate.

[0010] As an optional solution of the filtering device for the submersible oil pump described in the present invention, the bottom of the connecting column is fixedly connected with a baffle, the top of the baffle is fixedly connected with a spring, the spring is sleeved on the outside of the connecting column, the top of the spring is fixedly connected with a push plate, and the top of the push plate is rotatably connected to the bottom of the protective bottom plate.

[0011] As an optional scheme of the filtering device for the submersible oil pump described in the present invention, the outer side of the connecting column is slidably connected to a limiting block, the outer side of the connecting column is fixedly connected to an adjusting plate, the bottom of the adjusting plate is provided with a groove, the inside of the groove is slidably connected to an extension plate, the bottom of the extension plate is fixedly connected to the limiting block, the top of the extension plate extends to the inside of the groove, the outer side of the adjusting plate is fixedly connected to a fixing bolt, one end of the fixing bolt passes through the adjusting plate and the extension plate and extends to the inside of the extension plate and is threadedly connected to the extension plate, and the bottom of the limiting block contacts the top of the protective bottom plate.

[0012] As an optional solution of the filtering device for the submersible pump of the present invention, the protective bottom plate is internally rotatably connected with a connecting rod, the bottom of the connecting rod is provided with a cross opening, and the top of the connecting rod is fixedly connected with an adjusting screw.

[0013] As an optional solution of the filtering device for the submersible pump of the present invention, the outer side of the adjusting screw is threadedly connected with an adjusting screw sleeve, and the top of the adjusting screw sleeve is fixedly connected with a ramp plate.

[0014] As an optional solution of the filtering device for the submersible oil pump described in the present invention, a guide plate is fixedly connected to the outer side of the adjusting screw sleeve, a sliding groove is provided on the top of the protective bottom plate, the adjusting screw sleeve is slidably connected to the sliding groove, a guide groove is provided on the inner side of the sliding groove, and the guide groove is slidably connected to the guide plate.

[0015] As an optional solution of the filtering device for the submersible oil pump described in the present invention, wherein: a drainage block is fixedly connected to the outer side of the connecting column, the top of the drainage block is fixedly connected to the bottom of the reducer, the bottom of the drainage block is arranged in a conical shape, the number of the first filter screens is several, and the several first filter screens are distributed equidistantly in a ring shape, the number of the second filter screens is several, and the several second filter screens are evenly distributed.

[0016] The present invention has the following beneficial effects:

[0017] 1. The filtering device for the submersible oil pump is provided with a liquid inlet pipe, a first filter and a cleaning mechanism. When the connecting wheel axle rotates, the connecting wheel axle will drive the reducer at the bottom to rotate, and the reducer will drive the connecting column at the bottom to rotate at a reduced speed, and the connecting column connecting frame will rotate. The connecting frame drives the cleaning pad to rotate through the mounting plate. After the cleaning pad rotates, it cleans the first filter through friction with the first filter, so that the first filter will not be blocked, thereby improving the efficiency of oil transportation.

[0018] 2. The filtering device for the submersible oil pump is provided with a protective bottom plate, a second filter screen and a reversing mechanism. When the mounting plate rotates, the mounting plate will drive the transmission tooth plate to rotate. After the transmission tooth plate rotates, it will drive the transfer gear to rotate. After the transfer gear rotates, it will drive the transmission gear ring to rotate. After the transmission gear ring rotates, it will drive the bottom protective bottom plate to rotate. After the protective bottom plate rotates, each part of the second filter screen at the bottom can contact the impurities in the oil more evenly, preventing the impurities in the oil from accumulating in one place inside the second filter screen to cause serious blockage, thereby further improving the efficiency of oil transportation.

[0019] 3. The filtering device for the submersible oil pump is provided with a connecting rod and a ramp plate. The connecting rod can be rotated by a screwdriver through a cross opening. When the connecting rod is rotated, the adjusting screw sleeve will be driven to rotate, and the adjusting screw sleeve will move upward. When the adjusting screw sleeve moves upward, it will drive the ramp plate to move upward. When the connecting rod is rotated in the opposite direction, the ramp plate will move downward. As the height of the ramp plate is adjusted by moving up and down, the distance that the protective bottom plate is pushed to slide downward will also change accordingly, which can enhance the applicability of the ramp plate, make the amplitude of the protective bottom plate more suitable for the current scene after the change, and improve the efficiency of discharging impurities from the second filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the liquid inlet pipe of the present invention.

[0022] Figure 3 For the present invention Figure 2 Enlarged structural diagram at A in the middle.

[0023] Figure 4 It is a schematic structural diagram of the connecting rod and the ramp plate of the present invention.

[0024] Figure 5 It is a schematic diagram of the top view of the structure of the connecting column and the base plate of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the connection column and the base plate viewed from above according to the present invention.

[0026] Figure 7 It is a schematic diagram of the cross-sectional structure of the adjustment plate of the present invention.

[0027] In the figure: 1. submersible pump body; 2. delivery pipe; 3. oil outlet pipe; 4. liquid inlet pipe; 5. first filter screen; 6. impeller; 7. connecting wheel shaft; 8. reducer; 9. connecting column; 10. protective bottom plate; 11. second filter screen; 1201. connecting frame; 1202. mounting plate; 1203. cleaning pad; 13. fixing plate; 1401. transfer gear; 1402. transmission gear plate; 1403. transmission gear ring; 15. baffle; 16. spring; 17. push plate; 18. limit block; 19. connecting rod; 20. cross opening; 21. adjusting screw; 22. adjusting screw sleeve; 23. ramp plate; 24. guide plate; 25. sliding groove; 26. guide groove; 27. drainage block; 28. adjusting plate; 29. ​​groove; 30. extension plate; 31. fixing bolt. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0029] See also Figures 1 to 7 The present embodiment discloses a filtering device for a submersible pump, comprising a submersible pump body 1, the top of the submersible pump body 1 is connected to a delivery pipe 2, one side of the delivery pipe 2 is connected to an oil outlet pipe 3, the bottom of the submersible pump body 1 is connected to a liquid inlet pipe 4, the outer side of the liquid inlet pipe 4 is embedded with a first filter screen 5, the submersible pump body 1 is composed of a pump casing and a motor, the submersible pump body 1 is rotatably connected with an impeller 6, the inner side of the impeller 6 is fixedly connected with a connecting wheel shaft 7, one end of the connecting wheel shaft 7 is fixedly connected to the output end of the motor in the submersible pump body 1, and after the motor is started, its output end will drive the connecting wheel shaft 7 to rotate, the bottom of the connecting wheel shaft 7 is fixedly connected with a reducer 8, the bottom of the reducer 8 is fixedly connected with a connecting column 9, the outer side of the connecting column 9 is rotatably connected with a protective bottom plate 10, the inner side of the protective bottom plate 10 is embedded with a second filter screen 11, and the outer side of the connecting column 9 is fixedly connected with a cleaning mechanism.

[0030] The cleaning mechanism includes a connecting frame 1201, a mounting plate 1202 is fixedly connected to the side of the connecting frame 1201 away from the connecting column 9, a cleaning pad 1203 is fixedly connected to the side of the mounting plate 1202 away from the connecting column 9, and the side of the cleaning pad 1203 away from the connecting column 9 is in conflict with the first filter screen 5. There are several connecting frames 1201, mounting plates 1202 and cleaning pads 1203, and the several connecting frames 1201, mounting plates 1202 and cleaning pads 1203 are equidistantly distributed in a ring shape, and the center point of the several connecting frames 1201, mounting plates 1202 and cleaning pads 1203 is the center of the connecting column 9.

[0031] A fixed plate 13 is fixedly connected to the inner side of the liquid inlet pipe 4. There are two fixed plates 13, and the two fixed plates 13 are mirror-imaged on the inner side of the liquid inlet pipe 4. The top of the fixed plate 13 is rotatably connected to the bottom of the mounting plate 1202, and one side of the top of the fixed plate 13 is rotatably connected to a reversing mechanism.

[0032] The reversing mechanism includes a transfer gear 1401, which is rotatably connected to the fixed plate 13 via a rotating shaft, one side of the transfer gear 1401 is meshedly connected with a transmission tooth plate 1402, which is arranged in an arc shape and embedded in the bottom of the mounting plate 1202 away from the cleaning pad 1203, and the other side of the transfer gear 1401 is meshedly connected with a transmission gear ring 1403, the bottom of the transmission gear ring 1403 is fixedly connected to the top of the protective bottom plate 10. The transmission gear ring 1403 is an annular hollow setting, and the outer side of the transmission gear ring 1403 is provided with a tooth groove meshing with the transfer gear 1401.

[0033] In this embodiment, when the oil in the oil tank needs to be pumped out, the motor in the submersible pump body 1 is started, the output end of the motor will drive the connecting wheel shaft 7 to rotate, and the connecting wheel shaft 7 will drive the impeller 6 to rotate. The high-speed rotation of the impeller 6 generates a strong centrifugal force. This centrifugal force causes the oil filled in the impeller 6 to flow upward from the impeller 6 along the flow channel between the blades under the action of centrifugal force. At this time, the oil will enter from the liquid inlet pipe 4 at the bottom of the submersible pump body 1, and the first filter screen 5 in the liquid inlet pipe 4 will filter impurities in the oil, and the second filter screen 11 in the protective bottom plate 10 will also filter impurities in the oil and then be transported upward, so that the oil passes through the delivery pipe 2 and is discharged by the oil outlet pipe 3;

[0034] When the oil passes through the first filter screen 5 and the second filter screen 11, the first filter screen 5 and the second filter screen 11 will filter out impurities in the oil, and the first filter screen 5 and the second filter screen 11 will be clogged with dust after long-term use. When the motor in the submersible pump body 1 starts to drive the connecting wheel shaft 7 to rotate, the connecting wheel shaft 7 will drive the reducer 8 at the bottom to rotate, and the reducer 8 will drive the connecting column 9 at the bottom to rotate at a reduced speed. The connecting column 9 will drive the connecting frame 1201 to rotate with the connecting column 9 as the center, and the connecting frame 1201 will drive the mounting plate 1202 to rotate with the connecting column 9 as the center, and then the mounting plate 1202 will drive the cleaning pad 1203 to rotate with the connecting column 9 as the center. After the cleaning pad 1203 rotates, the cleaning pad 1203 rubs against the first filter screen 5, and during the rotation process, it plays a role in cleaning the clogged impurities in the first filter screen 5;

[0035] When the mounting plate 1202 rotates, the mounting plate 1202 will drive the transmission gear plate 1402 to rotate as well, and the rotation of the transmission gear plate 1402 will drive the transfer gear 1401 to rotate, and the rotation of the transfer gear 1401 will drive the transmission gear ring 1403 to rotate, and the rotation of the transmission gear ring 1403 will drive the bottom protective bottom plate 10 to rotate as well, and after the protective bottom plate 10 rotates, each part of the second filter screen 11 at the bottom thereof can more evenly contact with the impurities in the oil, thereby preventing the impurities in the oil from accumulating in one place inside the second filter screen 11 and causing serious blockage. Embodiment 2

[0036] This embodiment is an improvement made on the basis of the first embodiment. For details, please refer to Figures 1 to 7 The bottom of the connecting column 9 is fixedly connected with a baffle 15, the top of the baffle 15 is fixedly connected with a spring 16, the spring 16 is sleeved on the outside of the connecting column 9, the top of the spring 16 is fixedly connected with a push plate 17, and the top of the push plate 17 is rotatably connected to the bottom of the protective bottom plate 10.

[0037] The outer side of the connecting column 9 is fixedly connected to the limiting block 18, and the outer side of the connecting column 9 is fixedly connected to an adjusting plate 28. A groove 29 is provided at the bottom of the adjusting plate 28, and an extension plate 30 is slidably connected inside the groove 29. The bottom of the extension plate 30 is fixedly connected to the limiting block 18, and the top of the extension plate 30 extends to the inside of the groove 29. A fixing bolt 31 is fixedly connected to the outer side of the adjusting plate 28, and one end of the fixing bolt 31 passes through the adjusting plate 28 and the extension plate 30 and extends to the inside of the extension plate 30 and is threadedly connected to the extension plate 30. An opening is provided on the outer side of the extension plate 30, and the number of openings is several, and the several openings are equidistantly distributed. An internal thread is provided in the opening, and the fixing bolt 31 is threadedly connected to the opening on the outer side of the extension plate 30 through the internal thread. The bottom of the limiting block 18 contacts the top of the protective bottom plate 10.

[0038] A connecting rod 19 is rotatably connected inside the protective bottom plate 10 . A cross opening 20 is formed at the bottom of the connecting rod 19 . An adjusting screw 21 is fixedly connected to the top of the connecting rod 19 .

[0039] The outer side of the adjusting screw 21 is threadedly connected to an adjusting screw sleeve 22, and a thread groove is provided at the bottom of the adjusting screw sleeve 22 for use with the adjusting screw 21, so that the adjusting screw 21 is threadedly connected to the adjusting screw sleeve 22 through the thread groove. After the adjusting screw 21 rotates forward or reversely, the adjusting screw sleeve 22 will move upward or downward, and a ramp plate 23 is fixedly connected to the top of the adjusting screw sleeve 22.

[0040] By setting the ramp plate 23, when the protective bottom plate 10 rotates, the ramp plate 23 will be driven to rotate accordingly. After the ramp plate 23 rotates, it will contact the top fixed plate 13. Then, the rotating ramp plate 23 will push the protective bottom plate 10 downward. After the ramp plate 23 continues to rotate and separates from the fixed plate 13, the protective bottom plate 10 will be pushed upward and reset under the elastic force of the spring 16. Then, when the ramp plate 23 continues to contact the fixed plate 13 after rotating, the protective bottom plate 10 will be pushed downward again. This cycle is repeated, so that the protective bottom plate 10 slides up and down. As the protective bottom plate 10 slides up and down, the impurities blocked by the second filter screen 11 in the protective bottom plate 10 will be shaken out, so that the impurities blocked inside the second filter screen 11 are discharged.

[0041] The connecting rod 19 can be rotated by a screwdriver through the cross opening 20. After the connecting rod 19 is rotated, the adjusting screw sleeve 22 will be driven to rotate, and the adjusting screw sleeve 22 will move upward. After the adjusting screw sleeve 22 moves upward, it will drive the ramp plate 23 to move upward. When the connecting rod 19 is rotated in the opposite direction, the ramp plate 23 will move downward. As the height of the ramp plate 23 is adjusted by moving up and down, the distance that the protective bottom plate 10 is pushed to slide downward will also change accordingly, which can enhance the applicability of the ramp plate 23, make the amplitude of the protective bottom plate 10 more suitable for the current scene after the change, and improve the efficiency of discharging impurities from the second filter 11.

[0042] Two guide plates 24 are fixedly connected to the outside of the adjusting screw sleeve 22, a sliding groove 25 is provided on the top of the protective bottom plate 10, the adjusting screw sleeve 22 is slidably connected to the sliding groove 25 up and down, two guide grooves 26 are provided on the inner side of the sliding groove 25, the guide groove 26 is slidably connected to the guide plate 24, the length of the guide groove 26 is greater than the length of the guide plate 24, and the guide plate 24 and the guide groove 26 are clearance-matched.

[0043] By providing the guide plate 24 , the sliding groove 25 and the guide groove 26 , when the adjusting screw sleeve 22 moves up and down, the cooperation between the guide plate 24 and the guide groove 26 guides the movement of the adjusting screw sleeve 22 , thereby preventing the adjusting screw sleeve 22 from rotating with the adjusting screw 21 .

[0044] A drainage block 27 is fixedly connected to the outer side of the connecting column 9, the top of the drainage block 27 is fixedly connected to the bottom of the reducer 8, the bottom of the drainage block 27 is set in a conical shape, the number of first filter screens 5 is several, and the several first filter screens 5 are distributed equidistantly in a ring shape, the number of second filter screens 11 is several, and the several second filter screens 11 are evenly distributed.

[0045] By providing the drainage block 27 , the drainage block 27 can guide the flow of the oil when the oil is transported upward by the impeller 6 , thereby preventing the oil from being blocked by the reducer 8 during flow, thereby affecting the flow speed.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] 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 technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A filter device for a submersible pump, characterized in that: The invention comprises a submersible pump body (1), wherein the top of the submersible pump body (1) is connected to a delivery pipe (2), one side of the delivery pipe (2) is connected to an oil outlet pipe (3), the bottom of the submersible pump body (1) is connected to a liquid inlet pipe (4), the outer side of the liquid inlet pipe (4) is embedded with a first filter screen (5), the inside of the submersible pump body (1) is rotatably connected to an impeller (6), the inside of the impeller (6) is fixedly connected to a connecting wheel shaft (7), the bottom of the connecting wheel shaft (7) is fixedly connected to a reducer (8), the bottom of the reducer (8) is fixedly connected to a connecting column (9), the outer side of the connecting column (9) is rotatably connected to a protective bottom plate (10), the inside of the protective bottom plate (10) is embedded with a second filter screen (11), and the outer side of the connecting column (9) is fixedly connected to a cleaning mechanism; The cleaning mechanism comprises a connecting frame (1201), one side of the connecting frame (1201) is fixedly connected to a mounting plate (1202), one side of the mounting plate (1202) is fixedly connected to a cleaning pad (1203), and one side of the cleaning pad (1203) is in contact with the first filter screen (5); A fixing plate (13) is fixedly connected to the inner side of the liquid inlet pipe (4); the top of the fixing plate (13) is rotatably connected to the bottom of the mounting plate (1202); one side of the top of the fixing plate (13) is rotatably connected to a reversing mechanism; the reversing mechanism comprises a transfer gear (1401); one side of the transfer gear (1401) is meshingly connected to a transmission tooth plate (1402); the transmission tooth plate (1402) is embedded in the bottom of one side of the mounting plate (1202); the other side of the transfer gear (1401) is meshingly connected to a transmission tooth ring (1403); the bottom of the transmission tooth ring (1403) is fixedly connected to the top of the protective bottom plate (10); the bottom of the connecting column (9) is fixedly connected to a baffle plate (15). The top of the baffle (15) is fixedly connected to a spring (16), the spring (16) is sleeved on the outside of the connecting column (9), the top of the spring (16) is fixedly connected to a push plate (17), the top of the push plate (17) is rotatably connected to the bottom of the protective bottom plate (10); the outside of the connecting column (9) is fixedly connected to a limit block (18), the outside of the connecting column (9) is fixedly connected to an adjustment plate (28), the bottom of the adjustment plate (28) is provided with a groove (29), the inside of the groove (29) is slidably connected to an extension plate (30), the bottom of the extension plate (30) is fixedly connected to the limit block (18), the top of the extension plate (30) extends to the inside of the groove (29), the adjustment plate (28 ... The outer side of the plate (28) is fixedly connected with a fixing bolt (31), one end of the fixing bolt (31) passes through the adjustment plate (28) and the extension plate (30) and extends to the inside of the extension plate (30) to be threadedly connected with the extension plate (30), and the bottom of the limit block (18) contacts the top of the protective bottom plate (10); the outer side of the connecting column (9) is fixedly connected with the limit block (18), the outer side of the connecting column (9) is fixedly connected with the adjustment plate (28), the bottom of the adjustment plate (28) is provided with a groove (29), the inside of the groove (29) is slidably connected with the extension plate (30), the bottom of the extension plate (30) is fixedly connected with the limit block (18), and the top of the extension plate (30) extends to the groove (29). 9), the outer side of the adjustment plate (28) is fixedly connected with a fixing bolt (31), one end of the fixing bolt (31) passes through the adjustment plate (28) and the extension plate (30) and extends to the inside of the extension plate (30) to be threadedly connected with the extension plate (30), the bottom of the limit block (18) contacts the top of the protective bottom plate (10); the inside of the protective bottom plate (10) is rotatably connected with a connecting rod (19), the bottom of the connecting rod (19) is provided with a cross opening (20), and the top of the connecting rod (19) is fixedly connected with an adjusting screw (21); the outer side of the adjusting screw (21) is threadedly connected with an adjusting screw sleeve (22), and the top of the adjusting screw sleeve (22) is fixedly connected with a ramp plate (23);The outer side of the adjusting screw sleeve (22) is fixedly connected with a guide plate (24), the top of the protective bottom plate (10) is provided with a sliding groove (25), the adjusting screw sleeve (22) is slidably connected to the sliding groove (25), the inner side of the sliding groove (25) is provided with a guide groove (26), and the guide groove (26) is slidably connected to the guide plate (24); by providing a connecting rod and a ramp plate, the connecting rod is rotated by a screwdriver through a cross opening, and the connecting rod rotates to drive the adjusting screw sleeve to rotate, and the adjusting screw sleeve moves upward, and the adjusting screw sleeve moves upward to drive the ramp plate to move upward, and when the connecting rod is rotated in the opposite direction, the ramp plate moves downward, and as the height of the ramp plate is adjusted by moving up and down, the distance that the protective bottom plate is pushed to slide downward changes accordingly, thereby enhancing the applicability of the ramp plate, making the amplitude of the protective bottom plate more suitable for the current scene after the change, and improving the efficiency of discharging impurities from the second filter screen. ; 2. The filter device for a submersible pump according to claim 1, characterized in that: A drainage block (27) is fixedly connected to the outer side of the connecting column (9), the top of the drainage block (27) is fixedly connected to the bottom of the reducer (8), the bottom of the drainage block (27) is arranged in a conical shape, the number of the first filter screens (5) is a plurality, and the plurality of the first filter screens (5) are distributed in an annular manner and at equal intervals, and the number of the second filter screens (11) is a plurality, and the plurality of the second filter screens (11) are evenly distributed.

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