Automatic blowdown liquid collecting and discharging recovery device and control method thereof

Abstract

The application relates to the field of environmental protection, in particular to an automatic discharging and recycling device for discharging and recycling sewage and a control method thereof, which comprises a box body, a steady flow plate and a sand guide plate are fixedly connected to the inner side wall of the box body, the steady flow plate is located directly above the sand guide plate, a steady flow cavity is formed between the steady flow plate and the sand guide plate, a conical part is communicated with the bottom of the box body, a sand setting cavity is formed between the conical part and the sand guide plate, and water inlet pipes are communicated with the side walls of the box body. The floating plate is limited by respectively adjusting the threaded rods, the height of the floating block is limited, the volume of the box body can be increased according to the turbidity of the sewage, and the time for the sewage water surface height to rise is increased. Under the action of the steady flow plate and the sand guide plate, the sediment in the water is deposited above the sealing plate, and is automatically discharged after the weight reaches a certain value. The continuously rising sewage extrudes the separated clean water at the upper end, and the clean water flows into the U-shaped guard plate through the water outlet square groove on the limited floating plate.

Description

Technical Field

[0001] This invention relates to an emission recovery device, and more particularly to an automatic sewage collection and recovery device and its control method, belonging to the field of environmental protection technology. Background Technology

[0002] With the development of urban modernization, the discharge and recycling of industrial water in the chemical industry are receiving increasing attention. Water conservation is of great significance to the sustainable development and economic benefits of enterprises. Recycling usable water from wastewater is a manifestation of resource conservation. In the current context of environmental protection, the full recycling and reuse of wastewater is particularly important. Some wastewater from the chemical industry, containing fewer chemical elements, is directly discharged into rivers. The small amount of wastewater generated means that using a professional wastewater treatment system is more costly than actually beneficial. In industrial production, there is also wastewater with a high sediment content. The treatment of this wastewater is more complex, and its practicality is low.

[0003] With increasing emphasis on wastewater recycling, wastewater collection and recycling devices installed on various equipment that generate sediment are an effective way to treat wastewater and improve its comprehensive reuse. However, these devices typically include large sedimentation tanks. After the wastewater is discharged into the storage tank and left for a period of time, the sediment separates from the water. After the water is used, the tank needs to be cleaned. Cleaning the sediment requires manual or electrically driven cleaning equipment. When there are many wastewater recycling devices, the use of electrically driven equipment or manual cleaning increases the cost of wastewater recycling and wastes electricity or human resources.

[0004] Therefore, it is urgent to improve the automatic sewage collection and recovery device to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic sewage collection and recovery device and its control method. The device can limit the floating plate by adjusting the threaded rods, restricting the height of the floating block. This allows for adjusting the tank volume according to the turbidity of the sewage, increasing the time for the sewage level to rise, and maximizing the sedimentation of the sewage under a constant inlet flow. With the help of the flow stabilizer and guide plate, sediment in the water accumulates above the sealing plate and is automatically discharged after reaching a certain weight. The rising sewage compresses the separated clear water at the top, which then flows through the outlet groove on the limited floating plate into the U-shaped guard plate and finally out through the outlet pipe. Throughout this process, water and sediment are separated and discharged through hydraulic self-regulation, significantly saving costs and being more environmentally friendly. It also reduces the frequency of tank cleaning. Furthermore, the device can be used with multiple interconnected pipes, is easy to operate and control, and is highly practical.

[0006] To achieve the above objectives, the main technical solution adopted by the present invention includes: an automatic sewage discharge and collection recovery device, comprising a tank, wherein a flow stabilizing plate and a sand guide plate are fixedly connected to the inner side wall of the tank, the flow stabilizing plate is located directly above the sand guide plate, and a flow stabilizing cavity is formed between the flow stabilizing plate and the sand guide plate, a conical component is connected to the bottom of the tank, and a sand settling cavity is formed between the conical component and the sand guide plate, and water inlet pipes are connected to both side walls of the tank, the inner side walls of the two water inlet pipes are provided with anti-backflow components to prevent water from flowing back into the tank, one end of the water inlet pipe extending into the inside of the tank is located in the sand settling cavity and is connected to a water guide pipe, and the water guide pipe is located in the sand settling cavity, and a discharge port is connected to the bottom of the conical component. The discharge channel has two sliding rails fixedly connected to its inner walls on both sides. The two sliding rails are symmetrically arranged. A sealing plate is slidably connected to the inner wall of the discharge channel, and both sliding rails are slidably connected to the sealing plate. Several sealing rings are snapped onto the sealing plate. Two L-shaped fixing plates are fixedly connected to the lower end face of the discharge channel. The two L-shaped fixing plates are symmetrically arranged. A compression spring is fixedly connected to each of the two L-shaped fixing plates. The ends of the two compression springs away from the L-shaped fixing plates are connected to the lower end face of the sealing plate. The inner bottom wall of the conical part has two slopes, and the two slopes are symmetrically arranged. A sewage outlet is connected to the bottom of the conical part, and the sewage outlet is located in the middle of the two slopes.

[0007] Preferably, the anti-backflow assembly includes a snap-fit ​​ring, a movable plate, a telescopic spring, and a spring fixing bracket. The snap-fit ​​ring is fixedly connected to the inner wall of the water inlet pipe, the movable plate is fixedly connected to one end of the telescopic spring, and the other end of the telescopic spring is fixedly connected to one side wall of the spring fixing bracket. The movable plate and the telescopic spring are both located on the side of the snap-fit ​​ring away from the input end of the water inlet pipe.

[0008] Preferably, two sliding strips are fixedly connected to the inner wall of the water inlet pipe, and the two sliding strips are symmetrically arranged, and both sliding strips are slidably connected to the moving plate.

[0009] Preferably, the two ends of the water guide pipe are respectively connected to the side walls of the two water inlet pipes, and the side walls of the water guide pipe are provided with several through holes in the horizontal direction.

[0010] Preferably, the flow stabilizer plate has a plurality of water passage holes, the lower end face of the flow stabilizer plate is fixedly connected to a plurality of vertical flow baffles, and the side walls of the plurality of vertical flow baffles are staggered, the sand guide plate has a plurality of inclined portions, and a plurality of square inclined grooves are evenly formed on the plurality of inclined portions.

[0011] Preferably, a sliding square groove is provided on the side of the box away from the conical member, a floating plate is slidably connected in the sliding square groove, water guide plates are fixedly connected to the outer walls on both sides of the floating plate, a shelf is fixedly connected to the inner walls on both sides of the floating plate, and a water outlet square groove is provided on the side walls on both sides of the floating plate. The two water outlet square grooves are located directly above the two shelves, and the two water guide plates are located directly below the shelves.

[0012] Preferably, both shelves are movably connected to floating blocks. The upper surfaces of both sides of the shelves are provided with fixing components for fixing the floating blocks. The fixing components include a pull handle, a pressing rod, and a tension spring. The upper surfaces of both sides of the shelves are provided with circular grooves. The bottom wall of the circular groove is fixedly connected to one end of the tension spring, and the other end of the tension spring is fixedly connected to the lower surface of the pull handle. The pull handle is slidably connected to the circular groove, and one end of the pressing rod is fixedly connected to the side wall of the pull handle.

[0013] Preferably, U-shaped protective plates are fixedly connected to the side walls of both sides of the box body, and two ramp blocks are fixedly connected to the inner side wall of the U-shaped protective plate, and the two ramp blocks are symmetrically arranged. A water outlet pipe is connected to the side wall of the U-shaped protective plate away from the box body. The end of the water outlet pipe located inside the U-shaped protective plate is located between the two ramp blocks and is connected to the inside of the U-shaped protective plate.

[0014] Preferably, two limiting components for limiting the floating plate are fixedly connected to the outer walls of both sides of the box. The limiting components include a lifting hook plate, a sliding member, a limiting square plate, a threaded block, and a threaded rod. The sliding member is fixedly connected to the outer wall of the box. The lifting hook plate is slidably connected to the sliding member. The threaded block is fixedly connected to the upper end face of the sliding member. The threaded rod is threadedly connected to the threaded block. The end of the threaded rod away from the threaded block is rotatably connected to the upper end face of the limiting square plate. The lower end face of the limiting square plate is movably connected to the bottom of the lifting hook plate. The end of the lifting hook plate away from the sliding member is engaged with the floating plate.

[0015] A control method for an automatic sewage collection and recovery device includes the following steps:

[0016] S1: First, turn the threaded rods to move the limit plate upwards. Stop the limit plate at a suitable height according to the amount of sewage to be discharged. Then, the sewage enters the grit chamber through the two inlet pipes on both sides of the tank and the guide pipe.

[0017] S2: Then, as the sewage volume increases, the water level rises. As the water level rises, the heavier sediments such as sand and gravel fall. The sediments above the guide plate will enter the settling chamber through several inclined sections and several square sloping channels. Under the action of several inclined sections, the sand and gravel in the settling chamber will not be lifted into the stabilizing chamber due to the disturbance of the water flow introduced by the inlet pipe.

[0018] S3: When the water surface rises to the lower end of the floating block, the water surface gradually becomes stable under the action of the flow stabilizing plate as it passes through the flow stabilizing cavity. The water surface causes it to float and rise. At the same time as the floating block rises, it drives the floating plate to rise, which in turn drives the lifting hook plate that is locked to it to move upward. When the lifting hook plate moves to the position of the limiting square plate, it is blocked by the limiting square plate, which causes the floating plate to stop moving upward.

[0019] S4: Finally, the settled sand and gravel are guided into the discharge channel through the conical part. When the sand and gravel or sediment accumulates in the conical part and the discharge channel, the sealing plate will gradually descend under the action of the compression spring as the weight of the accumulation increases. At the same time as the sealing plate leaves the discharge channel, the sediment flows into the two slopes of the conical part and is discharged from the sewage outlet, while the separated clean water is discharged through the water outlet trough and water outlet pipe.

[0020] This invention has at least the following beneficial effects:

[0021] 1. By adjusting the threaded rods to limit the floating plate, the height of the floating block is restricted. This allows for adjusting the tank volume according to the turbidity of the wastewater, increasing the time for the wastewater surface to rise. This enables the wastewater to settle as much as possible under a constant inlet flow. With the help of the flow stabilizing plate and the sand guide plate, sediment in the water settles above the sealing plate and is automatically discharged after reaching a certain weight. The continuously rising wastewater squeezes the clear water separated at the top, which then flows through the outlet groove on the limited floating plate into the U-shaped guard plate and finally out through the outlet pipe. Throughout this process, water and sediment are separated and discharged through hydraulic self-regulation. This greatly saves costs, is more environmentally friendly, and reduces the frequency of tank cleaning. Furthermore, the device can be used with multiple interconnected pipes, making it easy to operate and control, and more practical. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a three-dimensional structural schematic diagram provided by the present invention;

[0024] Figure 2 Cross-sectional view provided by the present invention Figure 1 ;

[0025] Figure 3 Cross-sectional view provided by the present invention Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the fixed component structure provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the limiting component structure provided by the present invention;

[0028] Figure 6 A schematic diagram of the anti-backflow component structure provided by the present invention;

[0029] Figure 7 Partial structural illustration provided for this invention Figure 1 ;

[0030] Figure 8 Partial structural illustration provided for this invention Figure 2 ;

[0031] Figure 9 This is a schematic diagram of the sand guide plate structure provided by the present invention;

[0032] Figure 10 This is a schematic diagram of the flow stabilizer structure provided by the present invention;

[0033] Figure 11 This is a schematic diagram of the water pipe structure provided by the present invention;

[0034] Figure 12 This is a schematic diagram of the floating plate structure provided by the present invention;

[0035] Figure 13 This is a schematic diagram of the sliding square groove structure provided by the present invention.

[0036] In the diagram: 1. Box body; 2. Flow stabilizer plate; 20. Water passage hole; 201. Vertical flow baffle plate; 3. Sand guide plate; 300. Inclined part; 301. Square inclined channel; 4. Flow stabilizer cavity; 5. Sand settling cavity; 6. Conical component; 60. Slope; 7. Sliding square channel; 8. Floating plate; 800. Water guide plate; 801. Shelf; 802. Water outlet square channel; 803. Floating block; 804. Fixing component; 805. Hand pull component; 806. Pressing rod; 807. Tension spring; 808. Circular channel; 9. Anti-backflow component; 901. Clip. 902. Connecting ring; 903. Moving plate; 904. Telescopic spring; 905. Spring fixing bracket; 906. Sliding bar; 12. Water inlet pipe; 13. Water guide pipe; 1300. Through hole; 14. Discharge channel; 140. Sliding rail; 15. Sealing plate; 16. Sealing ring; 17. L-shaped fixing plate; 18. Compression spring; 19. Sewage outlet; 200. U-shaped guard plate; 21. Ramp block; 22. Water outlet pipe; 23. Limiting component; 24. Lifting hook plate; 25. Sliding part; 26. Limiting square plate; 27. Threaded block; 28. Threaded rod. Detailed Implementation

[0037] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0038] like Figures 1-13As shown, the automatic sewage collection and recovery device provided in this embodiment includes a housing 1. A flow stabilizing plate 2 and a sand guide plate 3 are fixedly connected to the inner side wall of the housing 1. The flow stabilizing plate 2 is located directly above the sand guide plate 3, and a flow stabilizing cavity 4 is formed between the flow stabilizing plate 2 and the sand guide plate 3. A conical piece 6 is connected to the bottom of the housing 1, and a sand settling cavity 5 is formed between the conical piece 6 and the sand guide plate 3. Water inlet pipes 12 are connected to both side walls of the housing 1. The inner side walls of the two water inlet pipes 12 are provided with anti-backflow components 9 to prevent water from flowing back into the housing 1. One end of the water inlet pipe 12 extends into the housing 1 and is located in the sand settling cavity 5 and is connected to a water guide pipe 13. The water guide pipe 13 is located in the sand settling cavity 5, and both ends of the water guide pipe 13 are connected to the side walls of the two water inlet pipes 12 respectively. Several through holes 1300 are opened horizontally on the side wall of the water guide pipe 13. The water guide pipe 13 can control the water flow rate. Inside the housing 1... The water will not easily surge. The bottom of the conical part 6 is connected to the discharge channel 14. The inner walls on both sides of the discharge channel 14 are fixedly connected to the sliding rails 140. The two sliding rails 140 are symmetrically arranged. The inner wall of the discharge channel 14 is slidably connected to the sealing plate 15, and both sliding rails 140 are slidably connected to the sealing plate 15. Several sealing rings 16 are snapped on the sealing plate 15. The lower end face of the discharge channel 14 is fixedly connected to two L-shaped fixing plates 17. The two L-shaped fixing plates 17 are symmetrically arranged. Compression springs 18 are fixedly connected to both L-shaped fixing plates 17. The ends of the two compression springs 18 away from the L-shaped fixing plates 17 are connected to the lower end face of the sealing plate 15. The inner bottom wall of the conical part 6 is two slopes 60, and the two slopes 60 are symmetrically opened. The bottom of the conical part 6 is connected to the drain outlet 19, and the drain outlet 19 is located in the middle of the two slopes 60.

[0039] Among them, such as Figure 6 As shown, the anti-backflow assembly 9 includes a snap ring 901, a movable plate 902, a telescopic spring 903, and a spring fixing bracket 904. The snap ring 901 is fixedly connected to the inner wall of the water inlet pipe 12. The movable plate 902 is fixedly connected to one end of the telescopic spring 903, and the other end of the telescopic spring 903 is fixedly connected to one side wall of the spring fixing bracket 904. The movable plate 902 and the telescopic spring 903 are both located on the side of the snap ring 901 away from the input end of the water inlet pipe 12. Two sliding strips 905 are fixedly connected to the inner wall of the water inlet pipe 12, and the two sliding strips 905 are symmetrically arranged. Both sliding strips 905 are slidably connected to the movable plate 902. The anti-backflow assembly 9 can prevent backflow inside the tank 1 while also controlling the flow rate of water when sewage flows into the tank 1.

[0040] Furthermore, such as Figure 9 as well as Figure 10As shown, the flow stabilizer plate 2 has several water passage holes 20, and several vertical flow baffles 201 are fixedly connected to the lower end face of the flow stabilizer plate 2. The side walls of the several vertical flow baffles 201 are staggered. The sand guide plate 3 has several inclined parts 300, and several square inclined grooves 301 are evenly provided on the several inclined parts 300.

[0041] Furthermore, such as Figures 1-13 As shown, a sliding square groove 7 is provided on the side of the box body 1 away from the conical part 6. A floating plate 8 is slidably connected in the sliding square groove 7. Water guide plates 800 are fixedly connected to the outer walls on both sides of the floating plate 8. Shelves 801 are fixedly connected to the inner walls on both sides of the floating plate 8. Water outlet square grooves 802 are provided on the side walls on both sides of the floating plate 8. The two water outlet square grooves 802 are located directly above the two shelves 801. The two water guide plates 800 are located directly below the shelves 801. Floating blocks 803 are movably connected to both shelves 801. The upper surfaces of both sides of the shelf 801 are provided with fixing components 804 for fixing the floating blocks 803. The fixing components 804 include a pull handle 805, a pressing rod 806, and a tension spring 807. Circular grooves 808 are formed on the upper surfaces of both sides of the shelf 801. The bottom wall of the circular groove 808 is fixedly connected to one end of the tension spring 807, and the other end of the tension spring 807 is fixedly connected to the lower surface of the pull handle 805. The pull handle 805 is slidably connected to the circular groove 808. One end of the pressing rod 806 is fixedly connected to the side wall of the pull handle 805. On the upper part, two limiting components 23 for limiting the floating plate 8 are fixedly connected to the outer walls of both sides of the housing 1. The limiting components 23 include a lifting hook plate 24, a sliding member 25, a limiting square plate 26, a threaded block 27, and a threaded rod 28. The sliding member 25 is fixedly connected to the outer wall of the housing 1. The lifting hook plate 24 is slidably connected to the sliding member 25. The threaded block 27 is fixedly connected to the upper end face of the sliding member 25. The threaded rod 28 is threadedly connected to the threaded block 27. The end of the threaded rod 28 away from the threaded block 27 is rotatably connected to the upper end face of the limiting square plate 26. The lower end face of 26 is movably connected to the bottom of the lifting hook plate 24. The end of the lifting hook plate 24 away from the sliding part 25 is engaged with the floating plate 8. Tightening the threaded rod 28 will drive the limiting square plate 26 to move upward. The limiting square plate 26 will be stopped at a suitable height according to the amount of sewage to be discharged. When the floating block 803 rises, it will drive the floating plate 8 to rise, which will in turn drive the lifting hook plate 24 engaged with it to move upward. When the lifting hook plate 24 moves to the position of the limiting square plate 26, it will be blocked by the limiting square plate 26, which will stop the floating plate 8 from moving upward.

[0042] Furthermore, such as Figure 8As shown, U-shaped protective plates 200 are fixedly connected to the side walls of the box 1 respectively. Two ramps 21 are fixedly connected to the inner side wall of the U-shaped protective plate 200, and the two ramps 21 are symmetrically arranged. A water outlet pipe 22 is connected to the side wall of the U-shaped protective plate 200 away from the box 1. One end of the water outlet pipe 22 is located inside the U-shaped protective plate 200 between the two ramps 21 and is connected to the inside of the U-shaped protective plate 200. The clean water separated from the sewage passes through the space between the U-shaped protective plate 200 and the box 1, and then flows into the water outlet pipe 22 and out.

[0043] like Figures 1-13 As shown in the figure, the control method of an automatic sewage collection and recovery device provided in this embodiment includes the following steps:

[0044] S1: First, turn the threaded rod 28 to move the limiting square plate 26 upward. Stop the limiting square plate 26 at a suitable height according to the amount of sewage to be discharged. Then the sewage enters the grit chamber 5 through the two water inlet pipes 12 and the water guide pipe 13 on both sides of the tank 1.

[0045] S2: Then, as the sewage volume increases, the water level rises. As the water level rises, the heavier sediments such as sand and gravel fall. The sediments above the guide plate 3 will enter the sedimentation chamber 5 through several inclined parts 300 and several square inclined channels 301. Under the action of several inclined parts 300, the sand and gravel in the sedimentation chamber 5 will not be stirred up into the flow stabilizing chamber 4 due to the disturbance of the water flow introduced by the inlet pipe 12.

[0046] S3: When the water surface rises to the lower end of the floating block 803, the water surface gradually becomes stable under the action of the flow stabilizing plate 2 when it passes through the flow stabilizing cavity 4. The water surface causes it to float and rise. At the same time as the floating block 803 rises, it drives the floating plate 8 to rise, which in turn drives the lifting hook plate 24 that is locked to it to move upward. When the lifting hook plate 24 moves to the position of the limiting square plate 26, it is blocked by the limiting square plate 26, which causes the floating plate 8 to stop moving upward.

[0047] S4: Finally, the settled sand and gravel are guided into the discharge channel 14 along with the conical part 6. When the sand and gravel or sediment accumulates in the conical part 6 and the discharge channel 14, as the weight of the accumulation increases, the sealing plate 15 will gradually descend under the action of the compression spring 18. At the same time as the sealing plate 15 leaves the discharge channel 14, the sediment flows into the two slopes 60 of the conical part 6 and is discharged from the drain outlet 19, while the separated clean water is discharged through the water outlet square channel 802 and the water outlet pipe 22.

[0048] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0049] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0050] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An automatic sewage collection and recovery device, comprising a housing (1), characterized in that: The inner wall of the box (1) is fixedly connected to a flow stabilizing plate (2) and a sand guide plate (3). The flow stabilizing plate (2) is located directly above the sand guide plate (3). A flow stabilizing cavity (4) is formed between the flow stabilizing plate (2) and the sand guide plate (3). A conical piece (6) is connected to the bottom of the box (1). A sand settling cavity (5) is formed between the conical piece (6) and the sand guide plate (3). Both sides of the box (1) are connected to water inlet pipes (12). The inner walls of the two water inlet pipes (12) are provided with anti-backflow components (9) to prevent water from flowing back into the box (1). One end of the water inlet pipe (12) extends into the box (1) and is located in the sand settling cavity (5) and is connected to a water guide pipe (13). Located inside the settling chamber (5), the bottom of the conical part (6) is connected to a discharge channel (14). Sliding rails (140) are fixedly connected to the inner walls on both sides of the discharge channel (14). The two sliding rails (140) are symmetrically arranged. A sealing plate (15) is slidably connected to the inner wall of the discharge channel (14), and both sliding rails (140) are slidably connected to the sealing plate (15). Several sealing rings (16) are snapped onto the sealing plate (15). Two L-shaped fixing plates (17) are fixedly connected to the lower end face of the discharge channel (14). The two L-shaped fixing plates (17) are symmetrically arranged. Compression springs (18) are fixedly connected to both L-shaped fixing plates (17). The end away from the L-shaped fixing plate (17) is connected to the lower end face of the sealing plate (15). The inner bottom wall of the conical part (6) has two slopes (60), and the two slopes (60) are symmetrically opened. The bottom of the conical part (6) is connected to a drain port (19), and the drain port (19) is located in the middle of the two slopes (60). The anti-backflow component (9) includes a snap ring (901), a moving plate (902), a telescopic spring (903), and a spring fixing bracket (904). The snap ring (901) is fixedly connected to the inner side wall of the water inlet pipe (12). The moving plate (902) is fixedly connected to one end of the telescopic spring (903), and the other end of the telescopic spring (903) is fixedly connected to... On one side wall of the spring fixing bracket (904), the moving plate (902) and the telescopic spring (903) are located on the side of the snap ring (901) away from the input end of the water inlet pipe (12). The flow stabilizing plate (2) is provided with several water passage holes (20). Several vertical flow blocking plates (201) are fixedly connected to the lower end face of the flow stabilizing plate (2), and the side walls of the several vertical flow blocking plates (201) are staggered. Several inclined parts (300) are provided on the sand guide plate (3), and several square inclined grooves (301) are evenly provided on the several inclined parts (300). Two limiting components (23) for limiting the floating plate (8) are fixedly connected to the outer walls of both sides of the box body (1).The limiting assembly (23) includes a lifting hook plate (24), a sliding member (25), a limiting square plate (26), a threaded block (27), and a threaded rod (28). The sliding member (25) is fixedly connected to the outer wall of the housing (1). The lifting hook plate (24) is slidably connected to the sliding member (25). The threaded block (27) is fixedly connected to the upper end face of the sliding member (25). The threaded rod (28) is threadedly connected to the threaded block (27). The end of the threaded rod (28) away from the threaded block (27) is rotatably connected to the upper end face of the limiting square plate (26). The lower end face of the limiting square plate (26) is movably connected to the bottom of the lifting hook plate (24). The end of the lifting hook plate (24) away from the sliding member (25) is engaged with the floating plate (8).

2. The automatic sewage collection and recovery device according to claim 1, characterized in that: Two slide bars (905) are fixedly connected to the inner wall of the water inlet pipe (12), and the two slide bars (905) are symmetrically arranged. Both slide bars (905) are slidably connected to the moving plate (902).

3. The automatic sewage collection and recovery device according to claim 2, characterized in that: The two ends of the water guide pipe (13) are respectively connected to the side walls of the two water inlet pipes (12), and the side wall of the water guide pipe (13) has several through holes (1300) in the horizontal direction.

4. The automatic sewage collection and recovery device according to claim 3, characterized in that: The box body (1) has a sliding square groove (7) on the side away from the conical part (6). A floating plate (8) is slidably connected in the sliding square groove (7). Water guide plates (800) are fixedly connected to the outer walls on both sides of the floating plate (8). Shelves (801) are fixedly connected to the inner walls on both sides of the floating plate (8). Water outlet square grooves (802) are opened on the side walls on both sides of the floating plate (8). The two water outlet square grooves (802) are located directly above the two shelves (801), and the two water guide plates (800) are located directly below the shelves (801).

5. The automatic sewage collection and recovery device according to claim 4, characterized in that: Both shelves (801) are movably connected to a floating block (803). The upper surfaces of both sides of the shelf (801) are provided with fixing components (804) for fixing the floating block (803). The fixing components (804) include a pull member (805), a pressing rod (806), and a tension spring (807). The upper surfaces of both sides of the shelf (801) are provided with a circular groove (808). The bottom wall of the circular groove (808) is fixedly connected to one end of the tension spring (807). The other end of the tension spring (807) is fixedly connected to the lower surface of the pull member (805). The pull member (805) is slidably connected to the circular groove (808). One end of the pressing rod (806) is fixedly connected to the side wall of the pull member (805).

6. The automatic sewage collection and recovery device according to claim 5, characterized in that: U-shaped protective plates (200) are fixedly connected to the two side walls of the box (1). Two ramps (21) are fixedly connected to the inner side wall of the U-shaped protective plate (200), and the two ramps (21) are symmetrically arranged. A water outlet pipe (22) is connected to the side wall of the U-shaped protective plate (200) away from the box (1). One end of the water outlet pipe (22) is located inside the U-shaped protective plate (200) between the two ramps (21) and is connected to the inside of the U-shaped protective plate (200).

7. A control method for the automatic sewage collection and recovery device as described in claim 6, characterized in that: Includes the following steps: S1: First, turn the threaded rod (28) to move the limiting square plate (26) upward. Stop the limiting square plate (26) at a suitable height according to the amount of sewage to be discharged. Then the sewage enters the grit chamber (5) through the two water inlet pipes (12) on both sides of the tank (1) and the water guide pipe (13). S2: Then, as the sewage volume increases, the water level rises. While the water level rises, the heavier sediments fall. The sediments above the guide plate (3) will enter the sedimentation chamber (5) through several inclined sections (300) and several square inclined channels (301). Under the action of several inclined sections (300), the sand and gravel in the sedimentation chamber (5) will not be stirred up into the flow stabilizing chamber (4) due to the disturbance of the water flow introduced by the inlet pipe (12). S3: When the water surface rises to the lower end of the floating block (803), the water surface gradually becomes stable under the action of the flow stabilizing plate (2) when it passes through the flow stabilizing cavity (4). The water surface causes it to float and rise. At the same time as the floating block (803) rises, it drives the floating plate (8) to rise, which in turn drives the lifting hook plate (24) that is engaged with it to move upward. When the lifting hook plate (24) moves to the position of the limiting square plate (26), it is blocked by the limiting square plate (26), which causes the floating plate (8) to stop moving upward. S4: Finally, the settled sand and gravel are introduced into the discharge channel (14) through the conical part (6). When the sand and gravel or sediment accumulates in the conical part (6) and the discharge channel (14), the sealing plate (15) will gradually descend under the action of the compression spring (18) as the weight of the accumulation increases. At the same time as the sealing plate (15) leaves the discharge channel (14), the sediment flows into the two slopes (60) of the conical part (6) and is discharged from the drain outlet (19). The separated clean water is discharged through the water outlet trough (802) and the water outlet pipe (22).

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