Reflux device

Abstract

The utility model relates to the field of sewage treatment, in particular to a backflow device which comprises a sewage pool, a discharging pipe, an air inlet pipe and a first one-way valve, the sewage pool is provided with a liquid storage cavity, the discharging pipe is connected to the sewage pool, the lower end of the discharging pipe extends into the liquid storage cavity, the air inlet pipe is connected to the sewage pool, and one end of the air inlet pipe is used for being connected with an external air source; the other end of the air inlet pipe is connected with a first branch pipe, the other end of the first branch pipe is connected to the discharging pipe, the first one-way valve is embedded in the first branch pipe, and the first one-way valve achieves one-way communication from the air inlet pipe to the discharging pipe. An external air source introduces air into the air inlet pipe, the air passes through the first one-way valve and the first branch pipe to enter the discharging pipe in a one-way mode, the air floats upwards to drive sludge, located above the first branch pipe, in the discharging pipe to move upwards, the purpose of discharging the sludge in the sewage pool is achieved, energy consumption of the device is reduced, use of a mechanical pump is reduced, and the use cost is reduced.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment, and in particular to a reflux device. Background Technology

[0002] When domestic sewage is treated in a sewage tank, sludge will form at the bottom of the tank. When a lot of sludge accumulates, it will affect the sewage purification process and needs to be cleaned. Cleaning usually involves first draining the water from the tank and then manually entering the tank to work. Even if the sewage purification work is suspended, manual cleaning is very time-consuming and labor-intensive.

[0003] Currently, to ensure uninterrupted wastewater purification, mechanical pumps are typically used to remove sludge during the purification process. This method utilizes the suction power of the mechanical pump to extract sludge from the tank through pipes, but the overall energy consumption and operating costs of this system are high. Utility Model Content

[0004] In order to reduce the energy consumption and operating costs of the device, this application provides a reflux device.

[0005] The reflux device provided in this application adopts the following technical solution:

[0006] A reflux device includes a sewage tank, a discharge pipe, an air inlet pipe, and a first one-way valve. The sewage tank has a storage chamber. The discharge pipe is connected to the sewage tank, and its lower end extends into the storage chamber. The air inlet pipe is connected to the sewage tank. One end of the air inlet pipe is used to connect to an external air source, and the other end of the air inlet pipe is connected to a first branch pipe. The other end of the first branch pipe is connected to the discharge pipe. The first one-way valve is embedded in the first branch pipe, and the first one-way valve enables unidirectional flow from the air inlet pipe to the discharge pipe.

[0007] By adopting the above technical solution, an external air source introduces air into the air inlet pipe. The air passes through the first one-way valve and the first branch pipe to achieve one-way air entry into the discharge pipe. Through the upward movement of the gas, the sludge located above the first branch pipe in the discharge pipe is moved upward, thereby achieving the purpose of discharging the sludge from the sewage tank, reducing the energy consumption of the device, reducing the use of mechanical pumps, and reducing the operating cost.

[0008] Preferably, it also includes a second one-way valve. The side wall of the air inlet pipe is connected to a plurality of second branch pipes. The other end of the second branch pipe is connected to the discharge pipe. The plurality of second branch pipes are distributed at intervals along the axis of the discharge pipe. The number of second one-way valves is the same as the number of second branch pipes and corresponds one-to-one. The second one-way valve is embedded in the second branch pipe. The second one-way valve realizes one-way flow from the air inlet pipe to the discharge pipe.

[0009] By adopting the above technical solution and setting up multiple second branch pipes, the upward movement of sludge in the discharge pipe is divided into several segments, gradually pushing the sludge upward, reducing the pressure of the air required to enter the discharge pipe, and reducing the energy consumption and operating cost of the device.

[0010] Preferably, the lower end of the discharge pipe is connected to a plurality of connecting blocks, which are distributed circumferentially around the axis of the discharge pipe. The end of the connecting block away from the axis of the discharge pipe is provided with a third chamfer on both sides of the circumference of the discharge pipe. The end of the connecting block away from the discharge pipe is connected to a baffle. The distance between the lower end of the discharge pipe and the baffle is smaller than the diameter of the discharge pipe.

[0011] By adopting the above technical solution, the distance between the lower end of the discharge pipe and the baffle is smaller than the diameter of the discharge pipe, and the outer side of the connecting block is provided with a third chamfer to cut and crush the sludge passing through the baffle and the lower end of the discharge pipe, thereby reducing the possibility of blocky sludge clogging the discharge pipe and improving the reliability of the device.

[0012] Preferably, the system further includes a feeding assembly. A partition is connected to the wall of the liquid storage chamber, which divides the liquid storage chamber into a purification chamber and a temporary storage chamber. A material passage is provided between the partition and the bottom of the liquid storage chamber, and the material passage connects the purification chamber and the temporary storage chamber. The feeding assembly includes a feeding plate, a feeding screw, and a feeding motor. The feeding plate is slidably embedded in the purification chamber, and the lower end of the feeding plate is in contact with the bottom of the liquid storage chamber. The feeding screw is rotatably connected to the sewage tank and is threadedly connected to the feeding plate. The feeding motor is connected to the sewage tank and is used to drive the feeding screw to rotate.

[0013] By adopting the above technical solution, the partition divides the liquid storage chamber into a purification chamber and a temporary storage chamber, reducing the possibility of mutual interference between sewage purification and sludge discharge. The pusher motor works, driving the pusher screw to rotate, which in turn drives the pusher plate to slide, continuously feeding the sludge at the bottom of the purification chamber into the temporary storage chamber, and then discharging the sludge through the discharge pipe, thus improving the reliability of the device.

[0014] Preferably, it also includes a collection component. The temporary storage chamber is driven to have a groove, and the bottom of the groove is provided with a collection groove. The side of the bottom of the groove near the collection groove is inclined vertically towards the bottom of the collection groove. There are two collection components, which are respectively located on both sides of the collection groove. The collection components are used to push the sludge at the bottom of the groove into the collection groove. The lower end of the discharge pipe extends into the collection groove.

[0015] By adopting the above technical solution, the groove is set at an angle, which makes it easier for the sludge at the bottom of the groove to slide into the collection tank under gravity. The two collection components further realize the collection of sludge in the groove into the collection tank, which makes it easier for the discharge pipe to discharge the sludge and improve work efficiency.

[0016] Preferably, the assembly also includes a magnetic sensor. The collecting component includes a scraper and a collecting drive cylinder. The scraper is slidably embedded in a groove, with one end of the scraper in contact with the bottom of the groove. A plurality of scraping teeth are connected to the side of the scraper near the collecting groove, and the plurality of scraping teeth are spaced apart along the length of the scraper. A second chamfer is provided on the outer periphery of the scraping teeth away from the scraper. The collecting drive cylinder is connected to the sewage tank and is used to drive the scraper to slide. A magnetic block is embedded in the pusher plate. The magnetic sensor is connected to the side of the scraper near the purification chamber and is used to detect the magnetic block and control the working of the collecting drive cylinder.

[0017] By adopting the above technical solution, after the pusher plate completes one push, the magnetic sensor detects the magnetic block and controls the piston rod of the collecting drive cylinder to extend and then retract, pushing the sludge in the groove into the collecting trough. This reduces the number of times the collecting drive cylinder works, reduces the energy consumption of the device, and the scraper is connected to scraper teeth on the side near the collecting trough, which helps to break up the sludge, reduces the possibility of lumpy sludge, facilitates the sludge to enter the discharge pipe, and improves the reliability of the device.

[0018] Preferably, it further includes a cam, a sealing plate, an abutment rod, and a first reset member. The sealing plate is slidably connected to the partition to realize the opening and closing of the material passage. The sliding direction of the sealing plate is vertical. The first reset member is connected between the sealing plate and the partition. The first reset member makes the lower end of the sealing plate tend to abut against the bottom of the liquid storage cavity. The abutment rod is connected to the upper end of the sealing plate. The cam is rotatably connected to the partition. The rotation axis of the cam is parallel to the rotation axis of the push screw. The push screw is used to drive the cam to rotate. The outer wall of the cam is used to abut against the lower end of the abutment rod.

[0019] By adopting the above technical solution, when the pusher screw is working, the pusher plate slides to clean the sludge in the purification chamber. The pusher screw drives the cam to rotate, and the cam abuts against the abutment rod, pushing the abutment rod to move upward, which in turn drives the sealing plate to move upward, so that the feed port opens, making it easier for the pusher plate to push the sludge in the purification chamber into the temporary storage chamber. When the pusher screw stops running, the sealing plate closes the feed port, isolating the purification chamber and the temporary storage chamber, reducing the possibility of mutual interference between sewage purification and sludge discharge, and improving the reliability of the device.

[0020] Preferably, the assembly further includes a turntable, a pawl, a second reset member, and an inner ratchet. The turntable is coaxially connected to the end of the pusher screw near the cam. The inner ratchet is connected to the cam, and its axis coincides with the cam's rotation axis and the turntable's axis. One end of the pawl is rotatably connected to the turntable, and its rotation axis is parallel to but not coincident with the turntable's rotation axis. The other end of the pawl is used to engage with the inner ratchet's tooth groove. The second reset member is connected between the pawl and the turntable, and the second reset member causes the end of the pawl near the inner ratchet to tend to engage with the inner ratchet's tooth groove.

[0021] By adopting the above technical solution, when the pusher screw rotates and drives the pusher plate to slide towards the temporary storage cavity, the pawl is engaged in the tooth groove of the inner ratchet under the action of the second reset component, driving the inner ratchet to rotate, driving the cam to rotate, and realizing the opening of the feed port. When the pusher plate slides away from the temporary storage cavity, the turntable reverses, the pawl disengages from the inner ratchet, and the sealing plate closes the feed port.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. An external air source introduces air into the air inlet pipe. The air passes through the first one-way valve and the first branch pipe to achieve one-way air entry into the discharge pipe. The air rises and carries the sludge located above the first branch pipe in the discharge pipe upward, thereby achieving the purpose of discharging the sludge in the sewage tank, reducing the energy consumption of the device, reducing the use of mechanical pumps, and reducing the operating cost.

[0024] 2. The partition divides the liquid storage chamber into a purification chamber and a temporary storage chamber, reducing the possibility of mutual interference between sewage purification and sludge discharge. The pusher motor works, driving the pusher screw to rotate and causing the pusher plate to slide, continuously feeding the sludge at the bottom of the purification chamber into the temporary storage chamber, and then discharging the sludge through the discharge pipe, thus improving the reliability of the device.

[0025] 3. After the pusher plate completes one push, the magnetic sensor detects the magnetic block and controls the piston rod of the collecting drive cylinder to extend and then retract, pushing the sludge in the groove into the collecting trough. This reduces the number of times the collecting drive cylinder works, lowers the energy consumption of the device, and the scraper is connected to scraper teeth on the side near the collecting trough, which helps to break up the sludge, reduces the possibility of lumpy sludge, facilitates the sludge to enter the discharge pipe, and improves the reliability of the device. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the reflux device.

[0027] Figure 2 This is a partial sectional view of the reflux device, mainly showing the sealing plate and the first reset component.

[0028] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0029] Figure 4 This is a partial cross-sectional view of the reflux device, mainly showing the collection components.

[0030] Figure 5 This is a partial sectional view of the reflux device, mainly showing the discharge pipe and the air inlet pipe.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Wastewater tank; 11. Storage chamber; 111. Purification chamber; 112. Temporary storage chamber; 113. Material inlet; 114. Groove; 115. Collection trough; 116. Embedded groove; 117. Second mounting groove; 12. Partition plate; 121. Slide groove; 122. Rotating groove; 123. Connecting hole; 13. First mounting groove;

[0033] 2. Transfer mechanism; 21. Pushing assembly; 211. Pushing motor; 212. Pushing screw; 213. Pushing plate; 2131. First chamfer; 2132. Drive block; 214. Magnetic block; 22. Collecting assembly; 221. Scraper; 2211. Scraper teeth; 22111. Second chamfer; 222. Collecting drive cylinder; 23. Magnetic sensor;

[0034] 3. Discharge pipe; 31. Vertical pipe; 32. Horizontal pipe; 33. Baffle; 34. Connecting block; 341. Third chamfer;

[0035] 4. Intake pipe; 41. Main pipe; 42. Connecting pipe; 43. First branch pipe; 44. Second branch pipe;

[0036] 51. First check valve; 52. Second check valve;

[0037] 6. Switching mechanism; 61. Enclosed plate; 62. First reset component; 63. Connecting rod; 64. Abutting rod; 65. Turntable; 66. Pawl; 67. Second reset component; 68. Inner ratchet; 69. Cam. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] Reference Figure 1This application discloses a reflux device including a sewage tank 1 and a transfer mechanism 2. The upper end of the sewage tank 1 is provided with a liquid storage chamber 11. A partition 12 is fixedly connected to the wall of the liquid storage chamber 11. The length direction of the partition 12 is parallel to the width direction of the sewage tank 1. The partition 12 divides the liquid storage chamber 11 into a purification chamber 111 and a temporary storage chamber 112. There is a material passage 113 between the lower end of the partition 12 and the bottom of the liquid storage chamber 11. The material passage 113 connects the purification chamber 111 and the temporary storage chamber 112. The transfer mechanism 2 includes a pushing assembly 21, which includes a pushing motor 211, a pushing screw 212, and a pushing plate 213. The pushing plate 213 is slidably embedded in the purification chamber 111. The sliding direction of the pushing plate 213 is parallel to the length direction of the sewage tank 1. The lower end of the pushing plate 213 is in contact with the bottom of the purification chamber 111, and both ends of the pushing plate 213 along its length are in contact with the walls of the purification chamber 111. The upper end of the pushing plate 213 is flush with the end of the partition 12 near the feed port 113. The upper end of the pushing plate 213 has a first chamfer 2131 on both sides along the sliding direction of the pushing plate 213. The end of the first chamfer 2131 near the bottom of the purification chamber 111 is located at the lower end of the pushing plate 213. The pusher screw 212 is rotatably embedded in the purification chamber 111. The rotation axis of the pusher screw 212 is parallel to the sliding direction of the pusher plate 213. The two ends of the pusher screw 212 are rotatably connected to the side wall of the purification chamber 111 away from the temporary storage chamber 112 and the side surface of the partition plate 12 away from the temporary storage chamber 112, respectively. A drive block 2132 is fixedly connected to the upper end of the pusher plate 213, and the drive block 2132 is threadedly connected to the pusher screw 212. The sewage tank 1 is provided with a first mounting groove 13, which is located on the side of the purification chamber 111 away from the temporary storage chamber 112. The pusher motor 211 is embedded in the first mounting groove 13 and is used to rotate the pusher screw 212 at the bottom of the chamber. In this embodiment, the housing of the pusher motor 211 is fixedly connected to the side wall of the first mounting groove 13 near the purification chamber 111, and the output shaft of the pusher motor 211 is coaxially fixedly connected to one end of the pusher screw 212.

[0040] Reference Figure 1 and Figure 2 A reflux device includes an on / off mechanism 6, which comprises a sealing plate 61 and a first reset member 62. The sealing plate 61 is slidably embedded in the feed port 113 to achieve the on / off state of the feed port 113. The sliding direction of the sealing plate 61 is vertical. A groove 121 is provided at the lower end of the partition plate 12, and the upper end of the sealing plate 61 is embedded in the groove 121. The first reset member 62 is connected between the sealing plate 61 and the partition plate 12, and the first reset member 62 makes the lower end of the sealing plate 61 tend to abut against the bottom of the liquid storage chamber 11. In this embodiment, the first reset member 62 is a spring. One end of the first reset member 62 is connected to the upper end of the sealing plate 61, and the other end of the first reset member 62 is connected to the bottom of the groove 121. There are two first reset members 62, which are symmetrically distributed along the length direction of the sealing plate 61.

[0041] Reference Figure 2 and Figure 3 The switching mechanism 6 also includes a connecting rod 63, an abutting rod 64, a turntable 65, a ratchet 66, a second reset component 67, an inner ratchet 68, and a cam 69. The partition 12 has a rotating groove 122 located above the slide groove 121. One end of the push screw 212 extends into the rotating groove 122. The turntable 65 is coaxially fixedly connected to the end of the push screw 212 that extends into the rotating groove 122. The inner ratchet 68 is rotatably embedded in the rotating groove 122. The rotation axis of ratchet 68 coincides with the rotation axis of turntable 65. One end of pawl 66 is rotatably connected to turntable 65, and the rotation axis of pawl 66 is parallel to but not coincident with the rotation axis of turntable 65. The other end of pawl 66 is used to engage with the tooth groove of inner ratchet 68. Second reset member 67 is connected between pawl 66 and turntable 65. Second reset member 67 makes the end of pawl 66 near inner ratchet 68 tend to engage with the tooth groove of inner ratchet 68. In this embodiment, second reset member 67 is a spring piece. One end of second reset member 67 is connected to the side of pawl 66 near inner ratchet 68, and the other end of second reset member 67 is connected to turntable 65. The abutment rod 64 is slidably embedded in the rotating groove 122. The sliding direction of the abutment rod 64 is parallel to the sliding direction of the closing plate 61. The abutment rod 64 is located above the inner ratchet 68. The bottom of the groove 121 is provided with two connecting holes 123, which are symmetrically distributed along the length of the closing plate 61. The number of connecting rods 63 is the same as the number of connecting holes 123 and they correspond one-to-one. The connecting rods 63 are slidably embedded in the connecting holes 123. The upper end of the connecting rod 63 is fixedly connected to the abutment rod 64, and the lower end of the connecting rod 63 is fixedly connected to the upper end of the closing plate 61. The first reset member 62 is sleeved on the outer periphery of the connecting rod 63. The cam 69 is fixedly connected to the outer periphery of the inner ratchet 68. The outer wall of the cam 69 is used to abut against the side surface of the abutment rod 64 near the closing plate 61.

[0042] Reference Figure 1 and Figure 4The bottom of the temporary storage chamber 112 is provided with a groove 114, the wall of the groove 114 is flush with the wall of the temporary storage chamber 112, and the bottom of the groove 114 is provided with a collection groove 115. The distance from the two sides of the collection groove 115 along the width direction of the sewage tank 1 to the two sides of the groove 114 along the width direction of the sewage tank 1 is equal. The bottom of the groove 114 is inclined towards the bottom of the collection groove 115 on the side closer to the collection groove 115. The transfer mechanism 2 also includes a collection component 22 and a magnetic sensor 23. Two collection components 22 are provided, symmetrically distributed along the width of the sewage tank 1. Each collection component 22 includes a scraper 221 and a collection drive cylinder 222. The scraper 221 is slidably embedded in the groove 114, with its sliding direction parallel to the inclined direction of the bottom of the groove 114. One end of the scraper 221 is in contact with the bottom of the groove 114, and its length direction is parallel to the length direction of the sewage tank 1. Both ends of the scraper 221 along its length direction are in contact with the wall of the groove 114. A plurality of scraping teeth 2211 are fixedly connected to the side of the scraper 221 near the collection groove 115, and these teeth are spaced apart along the length direction of the scraper 221. In this embodiment, five scraping teeth 2211 are provided, evenly distributed along the length direction of the scraper 221. The outer periphery of the scraper tooth 2211 away from the scraper 221 has a second chamfer 22111. A collecting drive cylinder 222 is connected to the sewage tank 1 and is used to drive the scraper 221 to slide. In this embodiment, the collecting drive cylinder 222 is a pneumatic cylinder. The cylinder body of the collecting drive cylinder 222 is fixedly connected to the outer wall of the sewage tank 1, and the piston rod of the collecting drive cylinder 222 extends into the temporary storage cavity 112 and is fixedly connected to the side surface of the scraper 221 away from the other scraper 221. A magnetic block 214 is embedded in the pusher plate 213. The sewage tank 1 has a second mounting groove 117 located below the feed port 113. A magnetic sensor 23 is embedded in the second mounting groove 117 to sense the magnetic block 214. In this embodiment, when the upper end of the pusher plate 213 is in contact with the lower end of the partition plate 12, the magnetic sensor 23 detects the magnetic block 214 and controls the collecting drive cylinder 222 to operate.

[0043] Reference Figure 1 and Figure 5The reflux device also includes a discharge pipe 3, which includes a vertical pipe 31, a horizontal pipe 32, a baffle 33, and a connecting block 34. The horizontal pipe 32 is fixedly connected to the lower end of the sewage tank 1 and is located on the side of the temporary storage chamber 112 away from the purification chamber 111. The length direction of the horizontal pipe 32 is parallel to the length direction of the sewage tank 1. The upper end of the vertical pipe 31 is fixedly connected to the end of the horizontal pipe 32 near the temporary storage chamber 112. The lower end of the vertical pipe 31 extends into the collecting trough 115. The bottom of the collecting trough 115 is provided with a groove 116. The baffle 33 is embedded in the groove 116, and the side wall of the baffle 33 is in contact with the wall of the groove 116. The length direction of the connecting block 34 is vertical. The lower end of the connecting block 34 is fixedly connected to the side surface of the baffle 33 away from the bottom of the groove 116. The other end of the connecting block 34 is fixedly connected to the lower end of the vertical pipe 31. There are a plurality of connecting blocks 34, which are distributed circumferentially around the axis of the vertical pipe 31. In this embodiment, three connecting blocks 34 are provided, and the three connecting blocks 34 are evenly distributed around the axis of the vertical pipe 31. The distance between the baffle 33 and the lower end of the vertical pipe 31 is less than the diameter of the vertical pipe 31. The end of the connecting block 34 away from the axis of the vertical pipe 31 is provided with a third chamfer 341 on one side of the vertical pipe 31 along the circumference. The cross-section of the connecting block 34 is triangular.

[0044] A reflux device further includes an air inlet pipe 4, a first one-way valve 51, and a second one-way valve 52. The air inlet pipe 4 includes a main pipe 41, a connecting pipe 42, a first branch pipe 43, and a second branch pipe 44. The main pipe 41 is fixedly connected to the side wall of the temporary storage chamber 112 away from the purification chamber 111, and the axis of the main pipe 41 is parallel to the axis of the vertical pipe 31. One end of the connecting pipe 42 is fixedly connected to the upper end of the main pipe 41, and the length direction of the connecting pipe 42 is parallel to the width direction of the sewage tank 1. The other end of the connecting pipe 42 is used to connect to an external air source. One end of the first branch pipe 43 is fixedly connected to the lower end of the main pipe 41, and the other end of the first branch pipe 43 is fixedly connected to the discharge pipe 3. The first branch pipe 43 is located in the groove 114, and the first one-way valve 51 is embedded in the first branch pipe 43, enabling one-way flow from the main pipe 41 to the vertical pipe 31. The second branch pipe 44 is located within the temporary storage cavity 112. One end of the second branch pipe 44 is fixedly connected to the outer wall of the main pipe 41, and the other end is fixedly connected to the outer wall of the vertical pipe 31. Several second branch pipes 44 are provided, spaced apart along the axis of the vertical pipe 31. In this embodiment, three second branch pipes 44 are provided, evenly distributed along the axis of the vertical pipe 31. The number of second one-way valves 52 is the same as the number of second branch pipes 44 and corresponds one-to-one. The second one-way valves 52 are embedded within the second branch pipes 44, enabling unidirectional flow from the main pipe 41 to the vertical pipe 31.

[0045] The implementation principle of a reflux device in this application embodiment is as follows: the pusher motor 211 works, driving the pusher screw 212 to rotate. The pusher screw 212 is threadedly connected to the drive block 2132, driving the pusher plate 213 to slide, pushing the sludge at the bottom of the purification chamber 111 towards the feed port 113.

[0046] The pusher screw 212 drives the turntable 65 to rotate, which in turn drives the pawl 66 to rotate. The pawl 66 is embedded in the tooth groove of the inner ratchet 68, which drives the inner ratchet 68 to rotate, which in turn drives the cam 69 to rotate. The cam 69 abuts against the abutment rod 64, which drives the abutment rod 64 to move upward. This drives the sealing plate 61 to move upward through the connecting rod 63, so that the feed port 113 opens, allowing the sludge in the purification chamber 111 to enter the temporary storage chamber 112 through the feed port 113. When one end of the pusher plate 213 extends into the feed port 113, the magnetic sensor 23 detects the magnetic block 214 in the pusher plate 213, controls the collection drive cylinder 222 to work, drives the scraper 221 to slide, and pushes the sludge at the bottom of the groove 114 into the collection trough 115. An external air source introduces gas into the main pipe 41 through the connecting pipe 42. The gas then enters the vertical pipe 31 through the first branch pipe 43 and the second branch pipe 44, pushing the sludge in the vertical pipe 31 toward the side closer to the horizontal pipe 32, thereby discharging the sludge from the sewage tank 1.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reflux device, characterized in that: The system includes a sewage tank (1), a discharge pipe (3), an air inlet pipe (4), and a first one-way valve (51). The sewage tank (1) is provided with a liquid storage chamber (11). The discharge pipe (3) is connected to the sewage tank (1). The lower end of the discharge pipe (3) extends into the liquid storage chamber (11). The air inlet pipe (4) is connected to the sewage tank (1). One end of the air inlet pipe (4) is used to connect to an external air source. The other end of the air inlet pipe (4) is connected to a first branch pipe (43). The other end of the first branch pipe (43) is connected to the discharge pipe (3). The first one-way valve (51) is embedded in the first branch pipe (43). The first one-way valve (51) enables one-way flow from the air inlet pipe (4) to the discharge pipe (3).

2. The reflux device according to claim 1, characterized in that: It also includes a second one-way valve (52), and the side wall of the air inlet pipe (4) is connected to a number of second branch pipes (44); the other end of the second branch pipe (44) is connected to the discharge pipe (3); the number of second branch pipes (44) is distributed at intervals along the axis of the discharge pipe (3); the number of second one-way valves (52) is the same as the number of second branch pipes (44) and corresponds one-to-one; the second one-way valve (52) is embedded in the second branch pipe (44); the second one-way valve (52) realizes one-way flow from the air inlet pipe (4) to the discharge pipe (3).

3. The reflux device according to claim 1, characterized in that: The lower end of the discharge pipe (3) is connected to a plurality of connecting blocks (34); the plurality of connecting blocks (34) are distributed circumferentially around the axis of the discharge pipe (3); the end of the connecting block (34) away from the axis of the discharge pipe (3) is provided with a third chamfer (341) on both sides of the circumference of the discharge pipe (3); the end of the connecting block (34) away from the discharge pipe (3) is connected to a baffle (33); the distance between the lower end of the discharge pipe (3) and the baffle (33) is less than the diameter of the discharge pipe (3).

4. The reflux device according to claim 1, characterized in that: It also includes a pusher assembly (21); a partition (12) is connected to the wall of the liquid storage chamber (11); the partition (12) divides the liquid storage chamber (11) into a purification chamber (111) and a temporary storage chamber (112); a material passage (113) is provided between the partition (12) and the bottom of the liquid storage chamber (11); the material passage (113) connects the purification chamber (111) and the temporary storage chamber (112); the pusher assembly (21) includes a pusher plate (213) and a pusher screw (213). 12) and pusher motor (211); the pusher plate (213) is slidably embedded in the purification chamber (111); the lower end of the pusher plate (213) is in contact with the bottom of the storage chamber (11); the pusher screw (212) is rotatably connected to the sewage tank (1); the pusher screw (212) is threadedly connected to the pusher plate (213); the pusher motor (211) is connected to the sewage tank (1); the pusher motor (211) is used to drive the pusher screw (212) to rotate.

5. The reflux device according to claim 4, characterized in that: It also includes a collection component (22); the temporary storage chamber (112) is driven to have a groove (114); the bottom of the groove (114) is provided with a collection groove (115); the bottom of the groove (114) near the collection groove (115) is inclined vertically towards the bottom of the collection groove (115); there are two collection components (22); the two collection components (22) are respectively located on both sides of the collection groove (115); the collection component (22) is used to push the sludge at the bottom of the groove (114) into the collection groove (115); the lower end of the discharge pipe (3) extends into the collection groove (115).

6. The reflux device according to claim 5, characterized in that: It also includes a magnetic sensor (23); the collecting assembly (22) includes a scraper (221) and a collecting drive cylinder (222); the scraper (221) is slidably embedded in the groove (114); one end of the scraper (221) is in contact with the bottom of the groove (114); a plurality of scraping teeth (2211) are connected to the side of the scraper (221) near the collecting groove (115); the plurality of scraping teeth (2211) are spaced apart along the length direction of the scraper (221); the scraping teeth (2211) A second chamfer (22111) is provided on the outer periphery of the end away from the scraper (221); the collecting drive cylinder (222) is connected to the sewage tank (1); the collecting drive cylinder (222) is used to drive the scraper (221) to slide; the pusher plate (213) is embedded with a magnetic block (214); the magnetic sensor (23) is connected to the side of the scraper (221) near the purification chamber (111); the magnetic sensor (23) is used to detect the magnetic block (214) and control the collecting drive cylinder (222) to work.

7. The reflux device according to claim 5, characterized in that: It also includes a cam (69), a sealing plate (61), an abutment rod (64), and a first reset member (62); the sealing plate (61) is slidably connected to the partition plate (12) to realize the opening and closing of the material passage (113); the sliding direction of the sealing plate (61) is vertical; the first reset member (62) is connected between the sealing plate (61) and the partition plate (12); the first reset member (62) makes the lower end of the sealing plate (61) tend to abut against the bottom of the liquid storage chamber (11); the abutment rod (64) is connected to the upper end of the sealing plate (61); the cam (69) is rotatably connected to the partition plate (12); the rotation axis of the cam (69) is parallel to the rotation axis of the push screw (212); the push screw (212) is used to drive the cam (69) to rotate; the outer wall of the cam (69) is used to abut against the lower end of the abutment rod (64).

8. The reflux device according to claim 7, characterized in that: It also includes a turntable (65), a pawl (66), a second reset member (67), and an inner ratchet (68); the turntable (65) is coaxially connected to the end of the pusher screw (212) near the cam (69); the inner ratchet (68) is connected to the cam (69); the axis of the inner ratchet (68) coincides with the rotation axis of the cam (69); the axis of the inner ratchet (68) coincides with the axis of the turntable (65); one end of the pawl (66) is rotatably connected to the turntable (65); the rotation axis of the pawl (66) is parallel to and does not coincide with the rotation axis of the turntable (65); the other end of the pawl (66) is used to embed into the tooth groove of the inner ratchet (68); the second reset member (67) is connected between the pawl (66) and the turntable (65); the second reset member (67) makes the end of the pawl (66) near the inner ratchet (68) tend to embed into the tooth groove of the inner ratchet (68).

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