Sewage circulating treatment equipment

Abstract

The invention discloses sewage circulation treatment equipment, and belongs to the technical field of sewage treatment.The sewage circulation treatment equipment comprises a sewage treatment box, a conical water inlet pipe is fixed to one end of the sewage treatment box, a mounting plate is assembled on the top of the inner wall of the sewage treatment box, a grating filter plate is assembled on one side of the upper surface of the mounting plate, and a channel frame is assembled on the mounting plate; a backflushing unit is assembled on the inner wall of the channel frame, a reducing unit is assembled on the inner side of the backflushing unit, and a collecting unit is assembled in the channel frame; by arranging the reducing unit and the collecting unit, aquaculture sewage flowing into the sewage treatment box through the conical water inlet pipe is filtered under the action of a grating filter plate, and meanwhile, a power part drives an impeller to rotate and drives two deformation parts to repeatedly get close to or away from each other; therefore, the area through which the sewage can flow is repeatedly reduced or recovered, so that the sewage can quickly pass through due to the reduction of the space regardless of the flow of the sewage.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to sewage circulation treatment equipment. Background Art

[0002] Wastewater treatment is the process of purifying sewage so that it meets the water quality requirements for discharge into a water body or reuse. Wastewater treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, catering, etc., and is increasingly entering the daily lives of ordinary people.

[0003] Among them, during the aquaculture process, the excrement and corpses of aquatic products will mix and settle at the bottom of the breeding pond. Over time, a sewage layer will form at the bottom of the breeding pond, which will affect the normal ecological environment of the breeding pond. Therefore, it is necessary to regularly treat the sewage layer in the breeding pond. The traditional sewage treatment mechanism can be divided into two categories: physical and chemical treatment technology and biological treatment technology.

[0004] In actual applications, when aquaculture wastewater flows into the equipment box, it will first be processed by a screen designed to remove large suspended particles, leftover bait, plankton and other impurities in the wastewater. Since the screen is usually set at an angle, although this design helps with initial filtration, it can easily cause the retained substances to accumulate in the bottom corners of the screen, gradually causing blockage on the surface of the screen. It is particularly noteworthy that some impurities in aquaculture wastewater often have a certain viscosity. This characteristic increases the risk of blockage in the screen mesh, thereby affecting the flow efficiency of the sewage. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the intercepted substances accumulate in the bottom corners of the grille and gradually cause blockage on the grille surface. It is particularly noteworthy that some impurities in aquaculture wastewater often have a certain viscosity. This characteristic aggravates the risk of blockage of the grille mesh, thereby affecting the circulation efficiency of the sewage. A sewage circulation treatment device is proposed.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a sewage circulation treatment device, comprising a sewage treatment tank, a conical water inlet pipe is fixed at one end of the sewage treatment tank, a mounting plate is installed on the top of the inner wall of the sewage treatment tank, a grid filter plate is installed on one side of the upper surface of the mounting plate, a channel frame is installed on the mounting plate, a recoil unit is installed on the inner wall of the channel frame, a diameter reducing unit is installed inside the recoil unit, and a collecting unit is installed inside the channel frame; The variable diameter unit includes a deformable member, and two push rods are slidably mounted on the mounting plate. One end of the push rod passes through the recoil unit and is connected to the deformable member. A first spring is fixed to the inner side of the push rod, and one end of the first spring is fixed to the outer wall of the channel frame. The collecting unit comprises an impeller, and a collecting frame is fixed to one end of the channel frame extending out of the mounting plate, and a power member is assembled on the lower surface of the mounting plate, and the power member is connected to one end of the push rod penetrating the mounting plate through a cam; The power member drives the push rod through the cam to drive the deformable members to move closer to or away from each other, intermittently changing the water flow rate, so that the trapped impurities can be squeezed out while reducing the occupied space and residence time on the surface of the grid filter plate.

[0007] As a further description of the above technical solution: The recoil unit includes an energy storage tube fixed on the channel frame, a piston seat is slidably mounted in the energy storage tube, a third spring is fixed to one side of the piston seat, a cross bar is fixed to one end of the third spring, the two ends of the cross bar are respectively fixed to the two side walls of the energy storage tube, an inclined push block is provided on the other side of the piston seat, one end of the inclined push block is fixed to the push rod, and a special-shaped guide piece is fixed to one side of the inner wall of the channel frame close to the inlet end of the energy storage tube.

[0008] As a further description of the above technical solution: The deformable member includes a middle plate fixed to the push rod, both ends of the middle plate are rotatably connected to extension plates, a connecting sleeve is sleeved on the extension plate, a second spring is fixed in the connecting sleeve, one end of the second spring is fixed to one end of the extension plate extending into the connecting sleeve, and one end of the connecting sleeve is rotatably connected to the energy storage tube.

[0009] As a further description of the above technical solution: An inclined filter plate is fixed on the inner wall of the collection frame, and a blow pipe with a plurality of air outlet holes on the surface is mounted on one side of the inner wall of the collection frame.

[0010] As a further description of the above technical solution: The collecting unit also includes an air guide hood fixedly connected to the channel frame, the air outlet end of the air guide hood is fixedly connected to a variable diameter conveying pipe, the variable diameter conveying pipe is fixedly connected to at least one variable diameter diversion pipe, and the blowing pipe passes through one end of the collecting frame and is fixed to one end of the variable diameter diversion pipe.

[0011] As a further description of the above technical solution: An inclined guide plate is fixed on the inner wall of the sewage treatment box, one end of the inclined guide plate is connected to the edge of the lower surface of the collection frame, and a gap is left between the other end of the inclined guide plate and a side wall of the sewage treatment box.

[0012] As a further description of the above technical solution: A material discharge chute is provided on the outer wall of the sewage treatment box, and the material discharge chute corresponds to the material discharge port of the collection frame. A retaining chute door is rotatably connected to the material discharge chute through a hinge, and the retaining chute door is tilted downward after being opened.

[0013] As a further description of the above technical solution: The power part comprises a double-shaft motor fixed on the lower surface of the mounting plate, the impeller is rotatably connected to the mounting plate, and one end of the double-shaft motor is fixed to the impeller.

[0014] As a further description of the above technical solution: A main gear is fixed to the other end of the dual-axis motor, and a secondary gear meshing with the main gear is rotatably connected to a side of the lower surface of the mounting plate close to the dual-axis motor.

[0015] As a further description of the above technical solution: The sewage treatment tank has two side walls rotatably connected to shafts via bearing seats, the cam is fixed to the top of the shaft, the bottom of the shaft, the lower surface of the main gear and the lower surface of the auxiliary gear are all fixed with pulleys, and the pulleys are meshed with synchronous belts.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. Through the variable diameter unit and the collection unit, the aquaculture sewage flowing into the sewage treatment tank through the conical water inlet pipe is filtered under the action of the grid filter plate. At the same time, the power part drives the impeller to rotate, which drives the two deformable parts to repeatedly approach or move away from each other, thereby repeatedly reducing or restoring the area through which the sewage can flow, so that no matter how large or small the sewage flow is, it can pass quickly due to the reduction of space; In the process of the deformation parts approaching or moving away from each other, the trapped impurities will be driven to flow on the surface of the grille filter plate, reducing the retention of impurities on the surface of the grille filter plate, and also scraping off the impurities adhering to the surface of the grille filter plate. At the same time, it can also compress larger impurities and squeeze out the water inside them, reducing the subsequent treatment of impurities. At the same time, when the deformation parts approach or move away, the water flow will intermittently surge at the front end of the mounting plate, and after gradually moving away, the water flow will generate a large impact on the surface of the grille filter plate, so that the impurities trapped on the surface of the grille filter plate can be pushed between the impeller blades. During the rotation of the impeller, the impurities are thrown into the collection frame for collection by centrifugal force. The coordinated use greatly reduces the risk of clogging of the grille filter plate mesh, while ensuring the fluidity of sewage. 2. Through the recoil unit, when the deformable parts are close to each other and the water flows to the front end of the mounting plate, part of the water will enter the energy storage tube for accumulation. After the deformable parts move away from each other, the inclined push rod will re-enter the energy storage tube, and then push the piston seat to move toward the inlet of the energy storage tube, and then push the water accumulated in the tube out again, and impact the water and the grid filter plate under the action of the inward arc notch of the special-shaped guide piece, so as to promote the sewage to flow more smoothly and help maintain the cleanliness and permeability of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a first viewing angle provided by an embodiment of the present invention is shown; Figure 2 A schematic diagram of a planar structure in a left-view state according to an embodiment of the present invention is shown; Figure 3 A schematic structural diagram of a variable diameter unit provided according to an embodiment of the present invention is shown; Figure 4 It shows a schematic diagram of the internal structure of a collection frame after being cut open according to an embodiment of the present invention; Figure 5 It shows a schematic diagram of the internal structure of a channel frame after it is cut open according to an embodiment of the present invention; Figure 6 It shows a schematic structural diagram of a sewage treatment tank provided by an embodiment of the present invention after one side is cut open; Figure 7 A schematic diagram of the structure of a second viewing angle provided according to an embodiment of the present invention is shown; Figure 8 It shows a schematic structural diagram of a power component provided according to an embodiment of the present invention; Fig. 9 A schematic diagram of a planar structure in a top-down state provided according to an embodiment of the present invention is shown; Fig.10 A schematic structural diagram of a recoil unit provided according to an embodiment of the present invention is shown; Fig.11 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at A in the middle; Fig.12 The embodiment of the present invention provides Figure 5 Schematic diagram of the enlarged structure at point B.

[0018] Legend: 10. Sewage treatment tank; 20. Mounting plate; 30. Variable diameter unit; 31. Deformation member; 311. Middle plate; 312. Extension plate; 313. Connecting sleeve; 314. Second spring; 32. Push rod; 33. First spring; 40. recoil unit; 41. energy storage tube; 42. piston seat; 43. inclined push block; 44. special-shaped flow guide; 45. third spring; 50. Collection unit; 51. Impeller; 52. Collection frame; 53. Power part; 531. Double-shaft motor; 532. Main gear; 533. Sub gear; 534. Shaft; 535. Cam; 536. Synchronous belt; 54. Air guide cover; 55. Variable diameter conveying pipe; 56. Variable diameter diverter pipe; 57. Filter plate; 58. Blowing pipe; 59. Inclined guide plate; 60. Channel frame; 70. Grid filter plate. DETAILED DESCRIPTION

[0019] 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.

[0020] like Figure 1 - Fig.12 As shown, the present invention provides: A sewage circulation treatment device comprises a sewage treatment tank 10, one end of which is fixed with a conical water inlet pipe, and the inner cavity of the specific sewage treatment tank 10 is a sedimentation chamber, an aeration chamber, a biodegradation chamber and a deep treatment chamber from left to right. The specific treatment processes such as sedimentation and aeration are well-known technologies and are not described in detail here. The treated water that meets the standards is re-sent into the breeding pond through a drainage pipe arranged at the other end of the sewage treatment tank 10. The top of the inner wall of the sewage treatment tank 10 is equipped with a mounting plate 20, the mounting plate 20 is located above the sedimentation chamber, one side of the upper surface of the mounting plate 20 is equipped with a grid filter plate 70, the mounting plate 20 is equipped with a channel frame 60, the inner wall of the channel frame 60 is equipped with a recoil unit 40, the inner side of the recoil unit 40 is equipped with a reducer unit 30, and the channel frame 60 is equipped with a collecting unit 50; The collecting unit 50 includes an impeller 51, and a collecting frame 52 is fixed to one end of the channel frame 60 extending out of the mounting plate 20. A power member 53 is mounted on the lower surface of the mounting plate 20. The power member 53 drives the push rod 32 through the cam 535 to drive the deformable members 31 to move closer to or away from each other, thereby intermittently changing the water flow rate, so that the trapped impurities can be squeezed out while reducing the space occupied and the residence time on the surface of the grille filter plate 70.

[0021] like Figure 2 , Figure 6 and Figure 8As shown, the power member 53 includes a double-shaft motor 531 fixed to the lower surface of the mounting plate 20, the impeller 51 is rotatably connected to the mounting plate 20, one end of the double-shaft motor 531 is fixed to the impeller 51, and the other end of the double-shaft motor 531 is fixed with a main gear 532, and a side gear 533 meshing with the main gear 532 is rotatably connected to the side of the lower surface of the mounting plate 20 close to the double-shaft motor 531, and the two side walls of the sewage treatment tank 10 are rotatably connected with a shaft 534 through a bearing seat, and a cam 535 is fixed to the top of the shaft 534, and the bottom end of the shaft 534, the lower surface of the main gear 532 and the lower surface of the side gear 533 are all fixed with pulleys, and a synchronous belt 536 is meshed and connected to the pulley; When sewage enters the sewage treatment tank 10 through the conical water inlet pipe, the dual-axis motor 531 is started to drive the impeller 51 to rotate clockwise, and the main gear 532 rotates clockwise together, and cooperates with one set of pulleys and the synchronous belt 536 to drive the cam 535 on one side to rotate clockwise, thereby pressing the push rod 32 on this side to move inward, and then driving the deformable member 31 connected thereto to move inward, and at the same time the main gear 532 drives the sub-gear 533 meshing therewith to rotate counterclockwise, and cooperates with another set of pulleys and the synchronous belt 536 to drive the cam 535 on the other side to rotate counterclockwise, thereby pressing the push rod 32 on this side to move inward, and then driving the deformable member 31 connected thereto to move inward together, so that the two deformable members 31 are close to each other, thereby scraping the surface of the grille filter plate 70, and reducing the area of ​​the grille filter plate 70 that can be contacted by the water flow, so that the sewage can intermittently flow to the front end of the mounting plate 20; After the deformable members 31 are close to each other, the flow range of the sewage entering between the two deformable members 31 is reduced, but the flow rate is increased, which can flush the surface of the deformable members 31 to prevent the deformable members 31 from remaining on the surface after squeezing the impurities. While approaching each other, the first spring 33 connected to the push rod 32 is gradually compressed. As the cam 535 continues to rotate, the two deformable members 31 that are close to each other are driven away from each other under the action of the compressed first spring 33. At this time, the sewage surging at the front end of the mounting plate 20 can continue to flow, and when it is initially away from each other, it generates a large impact force on the grid filter plate 70, which can push the squeezed impurities toward the impeller 51, and the filtered sewage falls through the mesh of the grid filter plate 70 into the sedimentation tank for sedimentation. At the same time, the impurities are gradually thrown into the collection frame 52 under the action of the impeller 51.

[0022] like Figure 3 , Figure 5 and Fig. 9As shown, the variable diameter unit 30 includes a deformable member 31, two push rods 32 are slidably mounted on the mounting plate 20, the power member 53 is connected to one end of the push rod 32 penetrating the mounting plate 20 through the cam 535, one end of the push rod 32 penetrating the recoil unit 40 is connected to the deformable member 31, a first spring 33 is fixed to the inner side of the push rod 32, and one end of the first spring 33 is fixed to the outer wall of the channel frame 60; The deformable member 31 includes a middle plate 311 fixed to the push rod 32, and both ends of the middle plate 311 are rotatably connected to an extension plate 312, a connecting sleeve 313 is sleeved on the extension plate 312, a second spring 314 is fixed in the connecting sleeve 313, one end of the second spring 314 is fixed to one end of the extension plate 312 extending into the connecting sleeve 313, and one end of the connecting sleeve 313 is rotatably connected to the energy storage tube 41; Specifically, the push rod 32 is driven to move back and forth under the action of the rotation of the cam 535, thereby driving the two deformable members 31 to move back and forth towards or away from each other. During this process, the extension plate 312 reciprocates to extend outward from or re-enter the connecting sleeve 313. During this process, after the extension plate 312 extends outward, there is a small gap between its bottom and the surface of the grid filter plate 70, so that the sewage will pass through the gap into the gap between the deformable member 31 and the energy storage tube 41. Since the gap is small, impurities will not enter through the gap. At the same time, the sewage will quickly rush into the gap due to the small gap, thereby flushing the grid filter plate 70 at that location.

[0023] like Figure 2 and Figure 5 As shown, an inclined guide plate 59 is fixed on the inner wall of the sewage treatment box 10, one end of the inclined guide plate 59 is connected to the edge of the lower surface of the collection frame 52, and a gap is left between the other end of the inclined guide plate 59 and a side wall of the sewage treatment box 10; The sewage falling through the grid filter plate 70 will fall on the surface of the inclined guide plate 59, and then slide to one side to the side wall of the sewage treatment tank 10, and then slide down into the sedimentation tank. This way of discharge will not cause large fluctuations in the sewage already collected in the sedimentation tank, and minimize the impact on the sewage during the sedimentation process.

[0024] like Figure 2 , Figure 3 , Fig. 9 and Fig.10As shown, the recoil unit 40 includes an energy storage tube 41 fixed on the channel frame 60, a piston seat 42 is slidably mounted in the energy storage tube 41, a third spring 45 is fixed to one side of the piston seat 42, a cross bar is fixed to one end of the third spring 45, the third spring 45 is in a compressed state in the initial state, the two ends of the cross bar are respectively fixed to the two side walls of the energy storage tube 41, an inclined push block 43 is provided on the other side of the piston seat 42, one end of the inclined push block 43 is fixed to the push rod 32, and a special-shaped guide piece 44 is fixed to one side of the inner wall of the channel frame 60 close to the inlet end of the energy storage tube 41; Specifically, windows corresponding to the inclined push block 43 are provided on both sides of the energy storage tube 41, and the inclined push block 43 is only in a smooth contact state with the piston seat 42, so that the inclined push block 43 can move with the push rod 32, and a filter is installed at the inlet end of the energy storage tube 41 to prevent impurities from entering the energy storage tube 41; It is worth noting that, due to the special shape of the special-shaped flow guide 44, during the normal flow of sewage, the sewage will not enter the energy storage pipe 41 or only a small amount of sewage will enter the energy storage pipe 41, and when the push rod 32 pushes the deformable member 31 to move inward, it will drive the inclined push block 43 to move with it, and at this time, the inclined push block 43 gradually stops contacting the piston seat 42, and at the same time, the third spring 45 in a compressed state gradually pushes the piston seat 42 to move toward the side away from the inlet end of the energy storage pipe 41, so that the energy storage pipe 41 can accumulate more sewage, and when the piston seat 42 moves to the farthest position it can move, the piston seat 42 can still keep covering the window to prevent the accumulated sewage from flowing out of the window; When the push rod 32 drives the deformable member 31 to reset, the inclined push block 43 gradually re-enters the energy storage tube 41. During the entry, the piston seat 42 is pushed by its inclined surface to move toward the inlet end of the energy storage tube 41 again. In the process, the accumulated sewage is quickly pushed outward to flush the grid filter plate 70, and at the same time, it can promote the sewage to flow quickly and smoothly.

[0025] like Figure 2 , Figure 4 , Figure 5 and Fig. 9 As shown, the collection unit 50 also includes an air guide cover 54 fixedly connected to the channel frame 60, the air outlet end of the air guide cover 54 is fixedly connected to a variable diameter conveying pipe 55, and the variable diameter conveying pipe 55 is fixedly connected to at least one variable diameter shunt pipe 56, an inclined filter plate 57 is fixed on the inner wall of the collection frame 52, and a blowing pipe 58 with a plurality of air outlet holes on the surface is installed on one side of the inner wall of the collection frame 52, the blowing pipe 58 is located below the filter plate 57, and the air outlet holes are inclined, and the blowing pipe 58 passes through one end of the collection frame 52 and is fixed to one end of the variable diameter shunt pipe 56; A feed chute is provided on the outer wall of the sewage treatment box 10, and the feed chute corresponds to the discharge port of the collection frame 52. A retaining chute door is rotatably connected to the feed chute through a hinge, and the retaining chute door is tilted downward after being opened; Specifically, during the rotation of the impeller 51, the impurities are thrown onto the surface of the filter plate 57 in the collection frame 52, and rolled toward the discharge chute under the action of the inclined surface. During the rotation of the impeller 51, the wind generated upwards enters the variable diameter conveying pipe 55 through the wind guide cover 54 to accelerate, and finally blows toward the filter plate 57 through the variable diameter shunt pipe 56, so that the impurities can move quickly toward the discharge chute, avoiding the accumulation of impurities on the surface of the filter plate 57. At the same time, a storage container can be set under the discharge chute in advance to receive the impurities falling from the discharge chute. It is worth noting that the retaining groove door can be opened after a certain amount of impurities have been collected to discharge them.

[0026] Specifically, when the sewage recycling treatment equipment is working / in use: First, the conical water inlet pipe is connected to the external pumping equipment, and the feed chute is opened, and a storage container is arranged below it. The sewage in the aquaculture pond enters the sewage treatment tank 10 through the conical water inlet pipe under the action of the external pumping equipment. Since the outlet of the conical water inlet pipe is flat, the sewage can flow into the sewage treatment tank 10 in a planar shape to avoid being concentrated in one place. When water enters, the dual-axis motor 531 is started to drive the impeller 51 to rotate clockwise. At the same time, under the cooperation of the main gear 532, the sub-gear 533, the pulley and the synchronous belt 536, the two deformable members 31 are brought close to each other, thereby scraping the surface of the grid filter plate 70 and reducing the area of ​​the grid filter plate 70 that can be contacted by the water flow, so that the sewage can intermittently flow to the front end of the mounting plate 20. During the continuous rotation, the deformable members 31 that are close to each other gradually move away from each other. At this time, the sewage flowing to the front end of the mounting plate 20 can continue to flow, and when they are initially away from each other, a large impact force is generated on the grid filter plate 70, which can push the squeezed impurities to the impeller 51, and the filtered sewage falls into the sedimentation tank through the mesh of the grid filter plate 70 for sedimentation. At the same time, the impurities are gradually thrown into the collection frame 52 under the action of the impeller 51, and the two deformable members 31 repeatedly move close to or away from each other, repeatedly reducing or restoring the area through which the sewage can flow, so that no matter how large or small the sewage flow is, it can pass quickly due to the reduction in space; In the process of driving the two deformable members 31 to reciprocate toward or away from each other, the extension plate 312 reciprocally extends outward from the connecting sleeve 313 or re-enters. In this process, after the extension plate 312 extends outward, there is a small gap between its bottom and the surface of the grille filter plate 70, so that the sewage will enter the gap between the deformable member 31 and the energy storage pipe 41 through the gap. The gap is small and impurities will not enter through the gap. At the same time, the sewage will also quickly rush into the gap due to the small gap, flushing the grille filter plate 70 at this location. At the same time, when they are close to each other, the energy storage pipe 41 accumulates sewage. When the push rod 32 drives the deformable member 31 to reset again, the inclined push block 43 also gradually re-enters the energy storage pipe 41. During the entry process, the piston seat 42 is pushed back to the inlet end of the energy storage pipe 41 through its inclined surface. In the process, the accumulated sewage is quickly pushed outward to flush the grille filter plate 70, and at the same time, it can promote the sewage to flow quickly and smoothly. At the same time, the impurities thrown into the collection frame 52 by the impeller 51 will fall on the surface of the filter plate 57 and roll toward the discharge chute under the action of the inclined surface. During the rotation of the impeller 51, the upward wind generated will enter the variable diameter conveying pipe 55 through the wind guide cover 54 to accelerate, and finally blow to the filter plate 57 through the variable diameter diversion pipe 56, blowing the impurities so that they can move quickly toward the discharge chute and fall into the storage container for centralized collection.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sewage circulation treatment device, comprising a sewage treatment tank (10), wherein a conical water inlet pipe is fixed to one end of the sewage treatment tank (10), characterized in that: A mounting plate (20) is mounted on the top of the inner wall of the sewage treatment tank (10); a grille filter plate (70) is mounted on one side of the upper surface of the mounting plate (20); a channel frame (60) is mounted on the mounting plate (20); a recoil unit (40) is mounted on the inner wall of the channel frame (60); a diameter reducing unit (30) is mounted on the inner side of the recoil unit (40); and a collecting unit (50) is mounted inside the channel frame (60); The variable diameter unit (30) comprises a deformable member (31), and two push rods (32) are slidably mounted on the mounting plate (20), one end of the push rod (32) passing through the recoil unit (40) and connected to the deformable member (31), a first spring (33) is fixed to the inner side of the push rod (32), and one end of the first spring (33) is fixed to the outer wall of the channel frame (60); The collecting unit (50) comprises an impeller (51); one end of the channel frame (60) extending out of the mounting plate (20) is fixed with a collecting frame (52); a power member (53) is mounted on the lower surface of the mounting plate (20); the power member (53) is connected to one end of the push rod (32) penetrating the mounting plate (20) via a cam (535); The power member (53) drives the push rod (32) via the cam (535) to drive the deformable members (31) to move closer to or farther from each other, thereby intermittently changing the water flow rate, so that the trapped impurities can be squeezed out while reducing the space occupied and the residence time on the surface of the grid filter plate (70).

2. A sewage circulation treatment equipment according to claim 1, characterized in that: The recoil unit (40) comprises an energy storage tube (41) fixed on a channel frame (60), a piston seat (42) being slidably mounted in the energy storage tube (41), a third spring (45) being fixed on one side of the piston seat (42), a cross bar being fixed on one end of the third spring (45), the two ends of the cross bar being respectively fixed to two side walls of the energy storage tube (41), an inclined surface push block (43) being provided on the other side of the piston seat (42), one end of the inclined surface push block (43) being fixed to a push rod (32), and a special-shaped flow guide (44) being fixed on one side of the inner wall of the channel frame (60) close to the inlet end of the energy storage tube (41).

3. A sewage circulation treatment equipment according to claim 2, characterized in that: The deformable member (31) comprises a middle plate (311) fixed to the push rod (32); both ends of the middle plate (311) are rotatably connected to extension plates (312); a connecting sleeve (313) is sleeved on the extension plate (312); a second spring (314) is fixed in the connecting sleeve (313); one end of the second spring (314) is fixed to one end of the extension plate (312) extending into the connecting sleeve (313); and one end of the connecting sleeve (313) is rotatably connected to the energy storage tube (41).

4. A sewage circulation treatment equipment according to claim 1, characterized in that: An inclined filter plate (57) is fixed on the inner wall of the collection frame (52), and a blow pipe (58) with a plurality of air outlet holes formed on its surface is mounted on one side of the inner wall of the collection frame (52).

5. A sewage circulation treatment equipment according to claim 4, characterized in that: The collecting unit (50) further comprises an air guide cover (54) fixedly connected to the channel frame (60); an air outlet end of the air guide cover (54) is fixedly connected to a variable diameter delivery pipe (55); the variable diameter delivery pipe (55) is fixedly connected to at least one variable diameter flow diversion pipe (56); and one end of the blowing pipe (58) passes through the collecting frame (52) and is fixed to one end of the variable diameter flow diversion pipe (56).

6. A sewage circulation treatment equipment according to claim 5, characterized in that: An inclined guide plate (59) is fixed on the inner wall of the sewage treatment box (10), one end of the inclined guide plate (59) is connected to the edge of the lower surface of the collection frame (52), and a gap is left between the other end of the inclined guide plate (59) and a side wall of the sewage treatment box (10).

7. The sewage circulation treatment equipment according to claim 4, characterized in that: A material discharge chute is provided on the outer wall of the sewage treatment box (10), the material discharge chute corresponds to the discharge port of the collection frame (52), a retaining chute door is rotatably connected to the inside of the material discharge chute via a hinge, and the retaining chute door is tilted downward when opened.

8. The sewage circulation treatment equipment according to claim 1, characterized in that: The power member (53) comprises a dual-axis motor (531) fixed to the lower surface of the mounting plate (20), the impeller (51) is rotatably connected to the mounting plate (20), and one end of the dual-axis motor (531) is fixed to the impeller (51).

9. A sewage circulation treatment equipment according to claim 8, characterized in that: A main gear (532) is fixed to the other end of the dual-axis motor (531), and a secondary gear (533) meshing with the main gear (532) is rotatably connected to a side of the lower surface of the mounting plate (20) close to the dual-axis motor (531).

10. The sewage circulation treatment equipment according to claim 8, characterized in that: A shaft (534) is rotatably connected to both side walls of the sewage treatment tank (10) via a bearing seat; the cam (535) is fixed to the top of the shaft (534); a pulley is fixed to the bottom of the shaft (535), the lower surface of the main gear (532) and the lower surface of the auxiliary gear (533); and a synchronous belt (536) is meshedly connected to the pulley.

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