A front pool filter device for a drainage pumping station for irrigation

Abstract

The application relates to the technical field of irrigation drainage pump station front pool filtering, and particularly discloses an irrigation drainage pump station front pool filtering equipment, one end of a main body is provided with a water inlet, the other end of the main body is provided with a water outlet, the inner side of the main body is rotationally connected with a rotating part, one end of the water inlet is rotationally connected with a cleaning part, the cleaning part is arranged close to the water outlet, and the side surface of the cleaning part is fixedly connected with the inner side of the main body. The irrigation drainage pump station front pool filtering equipment is provided with a filtering mechanism, so that the system composed of the front pool filtering equipment and the drainage pump can continuously and effectively carry out the drainage work, the drainage capacity of the system can be ensured from the influence of the mesh plate blockage when a large amount of drainage is needed under the condition of heavy rainfall, and the flood control and drainage safety of the related area is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to irrigation drainage pump station front pool filter technical field, specifically to a kind of irrigation drainage pump station front pool filter equipment. BACKGROUND

[0002] Pump station is the hydraulic power and air pressure power device with certain pressure and flow, and pump station engineering is the general term of water intake, water outlet and pump house of drainage and irrigation pump station.In the pump station engineering, the role of pump station front pool is to connect the diversion channel and intake pool, and to reasonably link the diversion channel and intake pool to make the water flow smoothly and uniformly into the intake pool to provide good water suction conditions for water pump.

[0003] The existing filter device filters the irrigation water stored in the station front pool through the filter screen. However, as the use time of the filter screen increases, the impurities accumulated on the filter screen also increase. At this time, it is necessary to stop the delivery of irrigation water, clean the filter screen and then resume the delivery of irrigation water. When there are many impurities in the water, the delivery of irrigation water needs to be stopped frequently, which affects the normal progress of irrigation work. If the filter screen is not cleaned, the water volume in the filter screen will continuously increase, which will continuously increase the pressure on the filter screen, and over time, it will cause damage to the filter screen and affect the normal use of the filter screen. SUMMARY

[0004] To achieve the above purpose, the present application is realized by the following technical scheme: a kind of irrigation drainage pump station front pool filter equipment, comprising;

[0005] Main body, the one end of the main body is provided with water inlet, the other end of the main body is provided with water outlet, the inner side of the main body is rotatably connected with rotating component, the one end of the water inlet is rotatably connected with cleaning component;

[0006] The cleaning component filters the water flow entering the main body, and the cleaning component is arranged close to the water outlet, and the side surface of the cleaning component is fixedly connected with the inner side of the main body;

[0007] The cleaning component includes a connecting block, the side surface of the connecting block is fixedly connected with the inner side of the main body, the side of the connecting block away from the inner wall of the main body is fixedly connected with an extension rod, the extension rod is sleeved with a first spring, one end of the first spring is fixedly connected with the connecting block, the other end of the first spring is fixedly connected with a sliding block, the other end of the extension rod is fixedly connected with a filtering mechanism, and the side surface of the filtering mechanism is slidably connected with the inner side of the main body;

[0008] When the drainage pump is working, the water in the station pool is continuously pumped into the drainage pump, the filtering mechanism is pulled by the drainage pump, and the filtering mechanism is impacted by the water flow to extrude the first spring and move towards the connecting block, so that the filtering mechanism filters the water flow entering the main body.

[0009] Preferably, the filtering mechanism comprises a mesh plate, the side surface of the mesh plate is fixedly connected with a sliding block, the side of the sliding block close to the connecting block is fixedly connected with the end of the telescopic rod away from the connecting block, the side of the sliding block away from the mesh plate is slidingly connected with the inner side of the main body, the side of the mesh plate close to the connecting block is slidingly connected with a sliding rod, the end of the sliding rod away from the mesh plate is fixedly connected with a support, the sliding rod is sleeved with a second spring, one end of the second spring is fixedly connected with the support, the other end of the second spring is fixedly connected with the side of the mesh plate close to the connecting block, the side of the support close to the mesh plate is uniformly provided with a jam clearing rod, the jam clearing rod is concentrically arranged with the mesh hole of the mesh plate, and one end of the jam clearing rod is fixedly connected with the support.

[0010] Through the extraction work of the drainage pump, the mesh plate moves towards the connecting block in the inner side of the main body through the sliding block, and when the mesh plate filters the water flow entering the main body, the drainage pump continuously extracts the water flow in the station pool, and the support drives the jam clearing rod to move away from the mesh plate under the driving of the water flow.

[0011] When the extraction force of the drainage pump on the water flow is less than the stretching force of the second spring during the water extraction work of the drainage pump, the support is driven by the reset of the second spring, so that the support drives the jam clearing rod to move towards the mesh plate through the sliding rod, so that the support drives the jam clearing rod to move towards the mesh hole of the mesh plate, and the jam clearing rod ejects the impurities jammed in the mesh plate, so that the mesh hole of the mesh plate is prevented from being jammed by the impurities in the water flow during the filtering work of the water flow, and when the extraction work of the drainage pump on the water flow in the station pool is completed, the support can be driven by the reset of the second spring to clean the mesh hole of the mesh plate.

[0012] Preferably, the rotating part comprises a rotating frame, both ends of the rotating frame are fixedly connected with helical leaves, one side of the helical leaf away from the rotating frame is rotatably connected with the side surface of the mesh plate, and the side surface of the rotating frame is fixedly connected with a contact mechanism.

[0013] When the drainage pump is extracting water, the net plate moves towards the connecting block through the sliding block in the main body, so that the net plate drives the rotating frame to move in the main body through the spiral vane, and the water in the pool in front of the station continuously flows into the main body through the continuous extraction of the drainage pump, so that the spiral vane at both ends of the rotating frame is impacted by the water flowing into the main body, so that the spiral vane drives the rotating frame to rotate in the inside of the main body, and the rotating frame drives the contact mechanism to rotate in contact with the inside of the main body, thereby cleaning the inside of the main body;

[0014] When the drainage pump stops working after extracting the water in the pool in front of the station, the bracket can be reset in the main body through the reset of the second spring, so that the connecting frame drives the baffle to separate from the inside of the main body, so that the impurities cleaned in the inside of the main body can flow out of the main body;

[0015] Preferably, the contact mechanism comprises a contact block, the number of the contact block is three, the three contact blocks are uniformly arranged around the rotating frame, a contact groove is formed in the side of the contact block away from the rotating frame, a contact rod is slidably connected to the inside of the contact groove, a contact plate is fixedly connected to the end of the contact rod away from the contact groove, the two sides of the contact plate are slidably connected to the inside of the contact groove, a bent plate is fixedly connected to one side of the contact plate, a rubber plate is fixedly connected to the other side of the contact plate, a third spring is sleeved on the contact rod, one end of the third spring is fixedly connected to the contact plate, and the other end of the third spring is fixedly connected to the inside of the contact groove.

[0016] When the rotating frame rotates with the spiral vane at both ends, the rotating frame drives the contact block to rotate, so that the contact block drives the bent plate and the rubber plate on both sides of the contact plate to rotate in contact with the inside of the main body, and the bending angle of the rubber plate is greater than that of the bent plate, so that the inside of the main body can be better cleaned, and when the contact and extrusion force between the bent plate and the rubber plate and the inside of the main body is greater than the extrusion force of the third spring, the third spring is extruded, the contact plate moves towards the contact groove through the contact rod, and the bent plate is prevented from scratching the inside of the main body during cleaning.

[0017] Preferably, the cleaning component comprises a baffle, the baffle is arranged close to the water inlet, the side surface of the baffle is slidably connected to the inside of the main body, the inside of the baffle is rotatably connected to the end of the spiral vane away from the rotating frame, and the side of the baffle away from the spiral vane is rotatably connected with a cleaning mechanism.

[0018] When the drainage pump is extracting water, the rotating frame moves with the mesh plate, and when the sliding block moves in the main body to the connecting block, the rotating frame moves with the baffle and the cleaning mechanism driven by the spiral vane on the other side, so that when the drainage pump extracts water from the pool in front of the station, the baffle can filter the water flow, so that larger impurities such as leaves in the pool in front of the station cannot enter the main body, and when the rotating frame rotates, the cleaning mechanism rotates on the baffle.

[0019] Preferably, the cleaning mechanism comprises a rotating rod, the side surface of the rotating rod is rotatably connected with the inner side of the baffle, one end of the rotating rod away from the circular block is fixedly connected with the spiral vane away from the side of the rotating frame, one end of the rotating rod is fixedly connected with a circular block, the side surface of the circular block is fixedly connected with an inclined rod, the number of the inclined rod is three, the three inclined rods are evenly arranged with the baffle as the center, the side of the inclined rod close to the baffle is fixedly connected with a cleaning rod, the side of the cleaning rod away from the inclined rod is in contact with the side surface of the baffle, and the side surface of the cleaning rod is uniformly provided with a clearance slot.

[0020] When the rotating frame rotates with the spiral vane at both ends, the spiral vane drives the circular block to rotate through the rotating rod, so that the circular block drives the inclined rod to rotate on the baffle, and the inclined rod is inclinedly arranged to sweep the leaves attached to the baffle, so that the leaves in the pool in front of the station are not attached to the baffle and interfere with the water flow into the main body.

[0021] Meanwhile, the cleaning rod is arranged on the side of the inclined rod close to the baffle, so that the inclined rod can drive the cleaning rod to rotate on the baffle when the inclined rod rotates, and the material of the cleaning rod is rubber, the clearance slot is uniformly arranged on the side surface of the cleaning rod, so that the cleaning rod can be deeply inserted into the gap and the corner to clean the surface of the baffle more carefully, and the cleanliness of the baffle is ensured.

[0022] The application provides a drainage pump station pool filtering equipment for irrigation.

[0023] 1. The drainage pump station pool filtering equipment for irrigation is provided with a filtering mechanism, so that the system composed of the pool filtering equipment and the drainage pump can continuously and effectively perform drainage work, the drainage capacity of the system is not affected by the mesh plate blockage in the case of heavy rainfall and the like requiring a large amount of drainage, and the flood control and drainage safety of the related area is ensured.

[0024] 2. The irrigation drainage pump station front pool filter equipment is provided with a contact mechanism, the rotating frame drives the rubber plate to rotate, the bending angle of the rubber plate is greater than that of the bending plate, can be more closely combined with the inner side of the main body, cover more area, reduce the cleaning dead angle, can more effectively scrape off the dirt, impurities and the like attached to the inner side of the main body, improve the overall cleaning effect, ensure the cleanliness of the inside of the main body.

[0025] 3. The irrigation drainage pump station front pool filter equipment is provided with an inclined rod, the inclined rod is inclinedly arranged, forms a certain angle with the baffle, can more effectively sweep off the leaves attached to the baffle when rotating, compared with the vertically arranged rod, the range of sweeping off leaves is larger and the strength is stronger, can quickly clean a large number of fallen leaves.

[0026] 4. The irrigation drainage pump station front pool filter equipment is provided with a cleaning rod, the cleaning rod made of rubber material has flexibility, when rotating in contact with the baffle, can effectively buffer the impact force in the cleaning process, avoid hard damage to the baffle and other related equipment components, prolong the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of the irrigation drainage pump station front pool filter equipment of the application;

[0028] Figure 2 It is a shaft side view of the application;

[0029] Figure 3 It is a sectional view of the application;

[0030] Figure 4 It is a structural schematic view of the unblocking component of the application;

[0031] Figure 5 It is a structural schematic view of the filtering mechanism of the application;

[0032] Figure 6 It is a structural schematic view of the rotating component of the application;

[0033] Figure 7 It is a structural schematic view of the rotating frame of the application;

[0034] Figure 8 It is a structural schematic view of the application Figure 7 It is a structural schematic view of A in the application;

[0035] Figure 9 It is a structural schematic view of the cleaning component of the application;

[0036] Figure 10 It is a structural schematic view of the cleaning mechanism of the application.

[0037] In the figure: 1, the main body; 2, the water inlet; 3, the water outlet; 4, the rotating part; 41, the rotating frame; 42, the spiral blade; 43, the contact mechanism; 431, the contact block; 432, the contact groove; 433, the contact rod; 434, the third spring; 435, the contact plate; 436, the bent plate; 437, the rubber plate; 5, the blockage cleaning part; 51, the connecting block; 52, the telescopic rod; 53, the first spring; 54, the filtering mechanism; 541, the mesh plate; 542, the sliding block; 543, the sliding rod; 544, the second spring; 545, the blockage cleaning rod; 546, the support; 6, the cleaning part; 61, the baffle; 62, the cleaning mechanism; 621, the rotating rod; 622, the round block; 623, the inclined rod; 624, the cleaning rod; 625, the accommodation groove. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0039] Please refer to Figures 1-3 The present application provides a technical solution: an irrigation drainage pump station front pool filtering equipment, comprising:

[0040] The main body 1 is provided with a water inlet 2 at one end, a water outlet 3 at the other end, and a rotating part 4 rotatably connected to the inner side of the main body 1. The water inlet 2 is rotatably connected to a cleaning part 6 at one end.

[0041] The blockage cleaning part 5 filters the water flow entering the main body 1. The blockage cleaning part 5 is arranged close to the water outlet 3, and the side surface of the blockage cleaning part 5 is fixedly connected to the inner side of the main body 1.

[0042] Please refer to Figures 1-4 The blockage cleaning part 5 includes a connecting block 51, which is fixedly connected to the inner side of the main body 1. The connecting block 51 is fixedly connected to a telescopic rod 52 on the side away from the inner wall of the main body 1. A first spring 53 is sleeved on the telescopic rod 52, with one end fixedly connected to the connecting block 51 and the other end fixedly connected to a sliding block 542. The other end of the telescopic rod 52 is fixedly connected to a filtering mechanism 54, and the side surface of the filtering mechanism 54 is slidingly connected to the inner side of the main body 1.

[0043] Specifically, when the drainage pump is working, the water flow in the station pool is continuously pumped in by the drainage pump, the filtering mechanism 54 is subjected to the pumping work of the drainage pump, and is impacted by the water flow to extrude the first spring 53 and move towards the connecting block 51, so that the filtering mechanism 54 filters the water flow entering the main body 1;

[0044] Please refer to Figures 1-5 The filtering mechanism 54 includes a mesh plate 541, the side surface of the mesh plate 541 is fixedly connected with a sliding block 542, the side of the sliding block 542 close to the connecting block 51 is fixedly connected with the end of the telescopic rod 52 away from the connecting block 51, and the side of the sliding block 542 away from the mesh plate 541 is slidingly connected with the inner side of the main body 1. The side of the mesh plate 541 close to the connecting block 51 is slidingly connected with a sliding rod 543, the end of the sliding rod 543 away from the mesh plate 541 is fixedly connected with a bracket 546, the sliding rod 543 is sleeved with a second spring 544, one end of the second spring 544 is fixedly connected with the bracket 546, and the other end of the second spring 544 is fixedly connected with the side of the mesh plate 541 close to the connecting block 51. The side of the bracket 546 close to the mesh plate 541 is uniformly provided with a jam clearing rod 545, the jam clearing rod 545 is concentrically arranged with the mesh hole of the mesh plate 541, and one end of the jam clearing rod 545 is fixedly connected with the bracket 546.

[0045] Specifically, through the pumping work of the drainage pump, the mesh plate 541 moves towards the connecting block 51 in the inner side of the main body 1 through the sliding block 542, and when the mesh plate 541 filters the water flow entering the main body 1, the drainage pump continuously pumps the water flow in the station pool, and the bracket 546 drives the jam clearing rod 545 to move away from the mesh plate 541 under the driving of the water flow.

[0046] When the pumping force of the drainage pump on the water flow is less than the stretching force of the second spring 544 during the pumping work of the drainage pump, the bracket 546 is driven by the reset of the second spring 544, so that the bracket 546 drives the jam clearing rod 545 to move towards the mesh plate 541 through the sliding rod 543, so that the bracket 546 drives the jam clearing rod 545 to move towards the mesh hole of the mesh plate 541, and the jam clearing rod 545 ejects the impurities jammed in the mesh plate 541, so that the mesh hole of the mesh plate 541 is not blocked by the impurities in the water flow during the filtering work of the water flow, and when the pumping work of the drainage pump on the water flow in the station pool is completed, the bracket 546 is also driven by the reset of the second spring 544 to clean the mesh hole of the mesh plate 541 when the drainage pump stops working.

[0047] The automatic unblocking design can clean the screen plate 541 in time when the drainage pump stops working, so that the whole drainage system can stably operate under different working conditions, reduces system failure and operation abnormity caused by screen plate 541 blockage, and improves reliability and safety of the drainage system.

[0048] Please refer to Figures 1-7 The application provides a technical solution:

[0049] The rotating part 4 comprises a rotating frame 41, both ends of the rotating frame 41 are fixedly connected with spiral blades 42, one spiral blade 42 is rotationally connected with the side surface of the screen plate 541 away from the rotating frame 41, and the side surface of the rotating frame 41 is fixedly connected with a contact mechanism 43;

[0050] Specifically, when the drainage pump is working, the screen plate 541 moves in the main body 1 to the connecting block 51 through the sliding block 542, so that the screen plate 541 drives the rotating frame 41 to move in the main body 1 through the spiral blade 42, and the water flow in the standing pool continuously enters the main body 1 through the continuous pumping work of the drainage pump, so that the spiral blade 42 drives the rotating frame 41 to rotate on the inner side of the main body 1 through the impact of the water flow entering the main body 1 on the spiral blades 42 at both ends of the rotating frame 41, and the rotating frame 41 drives the contact mechanism 43 to rotate in contact with the inner side of the main body 1, thereby cleaning the inner side of the main body 1;

[0051] When the pumping work of the drainage pump on the water flow in the standing pool is completed, the drainage pump stops working, the support 546 can also be driven to reset and move in the main body 1 through the reset of the second spring 544, so that the connecting frame drives the baffle 61 to separate from the inner side of the main body 1, and the impurities cleaned from the inner side of the main body 1 can flow out of the main body 1;

[0052] Please refer to Figures 1-8 The contact mechanism 43 comprises three contact blocks 431, the three contact blocks 431 are uniformly arranged at the center of the rotating frame 41, the side of the contact block 431 away from the rotating frame 41 is provided with a contact groove 432, the inner side of the contact groove 432 is slidably connected with a contact rod 433, one end of the contact rod 433 away from the contact groove 432 is fixedly connected with a contact plate 435, the two sides of the contact plate 435 are slidably connected with the inner side of the contact groove 432, one side of the contact plate 435 is fixedly connected with a bent plate 436, the other side of the contact plate 435 is fixedly connected with a rubber plate 437, the contact rod 433 is sleeved with a third spring 434, one end of the third spring 434 is fixedly connected with the contact plate 435, and the other end of the third spring 434 is fixedly connected with the inner side of the contact groove 432;

[0053] Specifically, when the rotating frame 41 rotates with the helical blades 42 at both ends, the rotating frame 41 drives the contact block 431 to rotate, so that the contact block 431 drives the curved plates 436 on both sides of the contact plate 435 and the rubber plate 437 to rotate in contact with the inner side of the main body 1. By setting the bending angle of the rubber plate 437 to be greater than that of the curved plate 436, the inner side of the main body 1 can be better cleaned. When the contact pressure between the curved plate 436 and the rubber plate 437 and the inner side of the main body 1 is greater than the extrusion force of the third spring 434, the third spring 434 is extruded, so that the contact plate 435 moves to the contact groove 432 through the contact rod 433, thereby avoiding the phenomenon that the curved plate 436 causes damage to the inner side of the main body 1 during cleaning;

[0054] The greater bending angle makes the rubber plate 437 more fully contact the inner side of the main body 1 during rotation, generating greater pressure and friction, which can more effectively remove stubborn stains, limescale and the like, achieving deep cleaning and ensuring that the main body 1 remains in a good cleaning state for a long time;

[0055] Please refer to Figures 1-9 The present application provides a technical solution: the cleaning component 6 includes a baffle 61, the baffle 61 is arranged close to the water inlet 2, the side surface of the baffle 61 is in sliding connection with the inner side of the main body 1, and the inner side of the baffle 61 is in rotary connection with one end of the helical blade 42 away from the rotating frame 41. The side of the baffle 61 away from the helical blade 42 is in rotary connection with a cleaning mechanism 62;

[0056] Specifically, when the water pump is working, the rotating frame 41 moves with the mesh plate 541 through the sliding block 542 in the main body 1 to the connecting block 51, so that the rotating frame 41 drives the baffle 61 and the cleaning mechanism 62 to move through the helical blade 42 on the other side. Therefore, when the water pump is working to extract the water flow in the standing pool, the baffle 61 can filter the water flow, thereby preventing larger impurities such as leaves and the like in the standing pool from entering the main body 1. Meanwhile, when the rotating frame 41 rotates, the cleaning mechanism 62 rotates on the baffle 61;

[0057] Please refer to Figures 1-10The cleaning mechanism 62 comprises a rotating rod 621, the side surface of the rotating rod 621 is rotationally connected with the inner side of the baffle 61, the end of the rotating rod 621 away from the circular block 622 is fixedly connected with the side of the spiral blade 42 away from the rotating frame 41, one end of the rotating rod 621 is fixedly connected with the circular block 622, the side surface of the circular block 622 is fixedly connected with inclined rods 623, the number of the inclined rods 623 is three, the three inclined rods 623 are evenly arranged with the baffle 61 as the center, the side of the inclined rod 623 close to the baffle 61 is fixedly connected with a cleaning rod 624, the side of the cleaning rod 624 away from the inclined rod 623 is in contact with the side surface of the baffle 61, and the side surface of the cleaning rod 624 is evenly provided with a clearance groove 625;

[0058] Specifically, when the rotating frame 41 rotates with the two ends of the spiral blade 42, the spiral blade 42 drives the circular block 622 to rotate through the rotating rod 621, so that the circular block 622 drives the inclined rod 623 to rotate on the baffle 61, and the inclined rod 623 is inclinedly arranged, so that the inclined rod 623 sweeps the leaves attached to the baffle 61, avoids the fallen leaves in the front pool from being driven by the water flow and being attached to the baffle 61, and thereby interfering with the water flow into the main body 1;

[0059] Meanwhile, the cleaning rod 624 is arranged on the side of the inclined rod 623 close to the baffle 61, so that the inclined rod 623 can drive the cleaning rod 624 to rotate on the baffle 61 when the inclined rod 623 rotates, and the material of the cleaning rod 624 is rubber material, the clearance groove 625 is evenly arranged on the side surface of the cleaning rod 624, so that the cleaning rod 624 can be deeply inserted into the gap and the corner to more carefully clean the surface of the baffle 61, and the cleanliness of the baffle 61 is ensured;

[0060] Specific working process:

[0061] The water outlet 3 of the main body 1 is connected with the input end of the drainage pump, after the water flow enters the front pool from the diversion channel, flows to the screen filter, and the water with impurities enters the inside of the filter through the water inlet 2 of the filter;

[0062] When the drainage pump works, the water flow in the front pool is sucked by the drainage pump, so that the unblocking component 5 moves in the inside of the main body 1, so that the rotating component 4 and the cleaning component 6 enter the main body 1;

[0063] The water flow enters the inside of the main body 1, the cleaning component 6 intercepts the impurities in the water flow, and the water passes through the aperture of the cleaning component 6 and enters the inside of the main body 1 to complete the preliminary filtration;

[0064] The water filtered by the cleaning component 6 enters the inside of the main body 1 through the water inlet 2, so that the unblocking component 5 performs the secondary filtration work on the water flow;

[0065] As the filtration proceeds, water flows into the drain pump.

[0066] Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless specifically described and limited.

Claims

1. An irrigation drainage pump station front pool filtering equipment, comprising, characterized by: a main body (1), one end of the main body (1) is provided with a water inlet (2), the other end of the main body (1) is provided with a water outlet (3), the inner side of the main body (1) is rotatably connected with a rotating part (4), one end of the water inlet (2) is rotatably connected with a cleaning part (6); the rotating part (4) comprises a rotating frame (41), the side surface of the rotating frame (41) is fixedly connected with a contact mechanism (43), the contact mechanism (43) comprises a contact block (431), the side of the contact block (431) away from the rotating frame (41) is provided with a contact groove (432), the inner side of the contact groove (432) is slidably connected with a contact rod (433), one end of the contact rod (433) away from the contact groove (432) is fixedly connected with a contact plate (435), the contact rod (433) is sleeved with a third spring (434), the both sides of the contact plate (435) and the inner side of the contact groove (432) are slidably connected, one end of the third spring (434) is fixedly connected with the contact plate (435), the other end of the third spring (434) is fixedly connected with the inner side of the contact groove (432); a blockage cleaning part (5) which filters the water flow entering the main body (1), the blockage cleaning part (5) is arranged close to the water outlet (3), the side surface of the blockage cleaning part (5) is fixedly connected with the inner side of the main body (1); the blockage cleaning part (5) comprises a connecting block (51), the side surface of the connecting block (51) is fixedly connected with the inner side of the main body (1), the side of the connecting block (51) away from the inner wall of the main body (1) is fixedly connected with an extension rod (52), the extension rod (52) is sleeved with a first spring (53), the other end of the extension rod (52) is fixedly connected with a filtering mechanism (54), the side surface of the filtering mechanism (54) is slidably connected with the inner side of the main body (1); the filtering mechanism (54) comprises a mesh plate (541), the side surface of the mesh plate (541) is fixedly connected with a sliding block (542), the side of the sliding block (542) away from the mesh plate (541) is slidably connected with the inner side of the main body (1), the side of the mesh plate (541) close to the connecting block (51) is slidably connected with a sliding rod (543), one end of the sliding rod (543) away from the mesh plate (541) is fixedly connected with a support (546), the sliding rod (543) is sleeved with a second spring (544), the side of the support (546) close to the mesh plate (541) is uniformly provided with a blockage cleaning rod (545), the blockage cleaning rod (545) is concentrically arranged with the mesh hole of the mesh plate (541), one end of the blockage cleaning rod (545) is fixedly connected with the support (546). When the drainage pump is pumping water, and the pumping force of the drainage pump is less than the stretching force of the second spring (544), the support (546) is driven to move by the reset of the second spring (544), so that the support (546) drives the unblocking rod (545) to move towards the mesh plate (541) through the sliding rod (543), so that the support (546) drives the unblocking rod (545) to move towards the mesh hole of the mesh plate (541), and the unblocking rod (545) pushes out the impurities blocked in the mesh plate (541). Both ends of the rotating frame (41) are fixedly connected with spiral blades (42), and one side of the spiral blade (42) away from the rotating frame (41) is rotatably connected with the side surface of the mesh plate (541).

2. A pre-pit filtering device for a drainage pumping station for irrigation according to claim 1, characterized in that: The side of the sliding block (542) close to the connecting block (51) is fixedly connected with one end of the telescopic rod (52) away from the connecting block (51), one end of the first spring (53) is fixedly connected with the connecting block (51), and the other end of the first spring (53) is fixedly connected with the sliding block (542).

3. A pre-pool filter apparatus for irrigation drainage pump stations according to claim 1, characterized in that: One end of the second spring (544) is fixedly connected with the support (546), and the other end of the second spring (544) is fixedly connected with the side of the mesh plate (541) close to the connecting block (51).

4. A pre-pool filter apparatus for a drainage pumping station for irrigation according to claim 3, characterized in that: One side of the contact plate (435) is fixedly connected with a bent plate (436), and the other side of the contact plate (435) is fixedly connected with a rubber plate (437).

5. A pre-pool filter apparatus for irrigation drainage pump stations according to claim 4, characterized in that: The number of the contact blocks (431) is three, and the three contact blocks (431) are uniformly arranged around the rotating frame (41).

6. A pre-pool filter apparatus for irrigation drainage pump stations according to claim 1, characterized in that: The cleaning component (6) comprises a baffle (61), the baffle (61) is arranged close to the water inlet (2), the side surface of the baffle (61) is slidably connected with the inner side of the main body (1), the inner side of the baffle (61) is rotatably connected with one end of the spiral blade (42) away from the rotating frame (41), and the side of the baffle (61) away from the spiral blade (42) is rotatably connected with a cleaning mechanism (62).

7. A pre-pool filter apparatus for a drainage pumping station for irrigation according to claim 6, characterized in that: The cleaning mechanism (62) comprises a rotating rod (621), one end of the rotating rod (621) is fixedly connected with a circular block (622), the side surface of the circular block (622) is fixedly connected with an inclined rod (623), the side of the inclined rod (623) close to the baffle (61) is fixedly connected with a cleaning rod (624), and the side surface of the cleaning rod (624) is uniformly provided with a clearance groove (625).

8. A pre-pool filter apparatus for a drainage pumping station for irrigation according to claim 7, characterized in that: The side surface of the rotating rod (621) is rotatably connected with the inner side of the baffle (61), one end of the rotating rod (621) away from the circular block (622) is fixedly connected with the side of the spiral blade (42) away from the rotating frame (41), the number of the inclined rods (623) is three, and the three inclined rods (623) are uniformly arranged around the baffle (61), and the side of the cleaning rod (624) away from the inclined rod (623) is in contact with the side surface of the baffle (61).

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