Filter backwash system

Abstract

The application belongs to the technical field of filters, and discloses a filter backwashing system, which comprises a blowdown pipe, a connecting piece is fixedly arranged on the side wall of the blowdown pipe, a drain pipe is fixedly arranged at the end of the connecting piece away from the blowdown pipe, a through hole is formed through the side wall of the connecting piece, the blowdown pipe, the through hole and the drain pipe are opposite to each other, a filter screen is fixedly arranged on the inner wall of the blowdown pipe, and an anti-backflow device for reducing the backflow probability of sewage is arranged in the through hole. The application has the effect of prolonging the service life of the device.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a filter backwashing system. Background Technology

[0002] In industrial production, water treatment, and various fluid purification fields, filters, as core impurity separation devices, directly affect the stability and economy of the entire production system through their operating efficiency and service life. To prevent filter cartridges from becoming clogged with impurities and thus reducing filtration efficiency, the industry commonly uses backwashing technology to clean filters regularly. The filter backwashing system is a key component in achieving this function. Its main role is to quickly and orderly discharge wastewater carrying impurities during the backwashing process, ensuring that the backwashing operation is completed efficiently, while preventing wastewater backflow from causing secondary pollution or damage to the filter body and upstream equipment.

[0003] Existing backwashing systems often have directly connected sewage and drainage pipes without effective backflow prevention mechanisms. When sewage cannot drain properly due to impurities, pipe bends, or external blockages, sewage quickly accumulates within the drainage pipe, creating back pressure. Under this pressure, the accumulated sewage can easily flow back into the sewage pipe through the connecting pipes, and may even seep into the filter unit and upstream piping. This backflow not only re-contaminates the cleaned filter, increasing backwashing frequency and energy consumption, but also risks damaging internal precision components due to corrosive impurities or solid particles in the sewage, severely shortening the filter's lifespan. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a filter backwashing system.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a filter backwashing system, including a sewage pipe, a connector fixedly installed on the side wall of the sewage pipe, a drain pipe fixedly installed at the end of the connector away from the sewage pipe, a through hole through the side wall of the connector, the sewage pipe, the through hole and the drain pipe facing each other, a filter screen fixedly installed on the inner wall of the sewage pipe, and an anti-backflow device for reducing the probability of sewage backflow is installed in the through hole.

[0006] By adopting the above technical solution, when the backwashing system is working, the flushing wastewater flows into the drain pipe, and then flows out through the drain pipe, through-hole, and drain pipe in sequence. During this process, if the outlet of the drain pipe is blocked, the wastewater cannot flow out normally, leading to the accumulation of wastewater in the drain pipe. In this process, the anti-backflow device blocks the wastewater in the drain pipe, thereby reducing the probability of wastewater flowing into the drain pipe, thus reducing the probability of wastewater flowing into the equipment, reducing the phenomenon of wastewater backflow, and thus reducing the probability of backflow wastewater damaging the equipment, thereby extending the service life of the device.

[0007] Furthermore, symmetrical rotating grooves are provided on the inner wall of the through hole. The anti-backflow device includes two rotating rods respectively rotatably disposed in the two rotating grooves, a fixed plate fixedly disposed in the through hole, and a rotating plate fixedly disposed on the side walls of the two rotating rods close to each other. The rotating plate is rotatably connected to the through hole, and the side wall of the fixed plate away from the sewage pipe abuts against the side wall of the rotating plate close to the sewage pipe.

[0008] By adopting the above technical solution, when sewage flows out sequentially through the sewage pipe, through hole, and drain pipe, the rotating plate rotates under the action of water flow, causing the sewage to flow into the drain pipe below the fixed plate. During this process, if the outlet of the drain pipe becomes blocked, sewage accumulates inside. At this point, the rotating plate rotates in the opposite direction under the action of the sewage. During this process, because the side wall of the fixed plate away from the sewage pipe abuts against the side wall of the rotating plate near the sewage pipe, the rotating plate cannot continue to rotate when it comes into contact with the side wall of the fixed plate. This prevents the sewage from flowing into the drain pipe, thus reducing the probability of sewage flowing into the equipment.

[0009] Furthermore, a reset groove is provided on the inner wall of the rotating groove, and a torsion spring is fixedly provided on the inner wall of the reset groove. The other end of the torsion spring is fixedly provided on the side wall of the rotating rod away from the rotating plate.

[0010] By employing the above technical solution, when sewage accumulates in the drain pipe, the rotating plate rotates in the opposite direction under the action of the sewage. During this process, the torsion spring reduces the difficulty of rotating the plate. Furthermore, when the water flow forces on both sides of the rotating plate are equal, the torsion spring can break this balance, causing the rotating plate to rotate in the opposite direction, thereby reducing the difficulty of rotating the plate.

[0011] Furthermore, a sealing groove is provided on the inner wall of the rotating groove, and a sealing ring is installed in the sealing groove. The sealing ring is sleeved on the outer wall of the rotating rod, and the sealing ring is made of rubber.

[0012] By adopting the above technical solution, the sealing ring reduces the probability of sewage flowing into the rotating groove and the reset groove, thereby reducing the probability of damage to the torsion spring and extending the service life of the device.

[0013] Furthermore, the connector includes an upper mounting block fixedly mounted on the side wall of the sewage pipe and a lower mounting block mounted on the bottom surface of the upper mounting block. The bottom surface of the lower mounting block has two mutually symmetrical threaded rods threaded through it, and both threaded rods are threadedly connected to the upper mounting block.

[0014] By adopting the above technical solution, when the anti-backflow device is damaged, workers can remove the mounting block using the threaded rod. At this point, workers can repair the anti-backflow device, reducing the difficulty of repairing the device and thus lowering the workload for the workers.

[0015] Furthermore, the rotating plate has a rounded corner at one end near the fixed plate.

[0016] By adopting the above technical solution, the rounded corners reduce the probability of the rotating plate colliding with the fixed plate when it rotates, thereby improving the stability of the device.

[0017] Furthermore, installation grooves are provided on the side walls of the sewage pipe and the drainage pipe that are close to each other, and sealing gaskets are installed in both installation grooves.

[0018] By adopting the above technical solution, the sealing gasket improves the sealing performance of the device, thereby reducing the probability of sewage leakage.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. In this application, when the backwashing system is working, the backwashing wastewater flows into the drain pipe, and then flows out through the drain pipe, through hole and drain pipe in sequence. During this process, when the outlet of the drain pipe is blocked, the wastewater cannot flow out normally, which leads to the accumulation of wastewater in the drain pipe. During this process, the anti-backflow device blocks the wastewater in the drain pipe, thereby reducing the probability of wastewater flowing into the drain pipe, thus reducing the probability of wastewater flowing into the equipment, thereby reducing the phenomenon of wastewater backflow, thereby reducing the probability of backflow wastewater damaging the equipment, and thus extending the service life of the device;

[0021] 2. In this application, when sewage flows out sequentially through the sewage pipe, through hole, and drain pipe, the rotating plate rotates under the action of water flow, causing the sewage to flow into the drain pipe below the fixed plate. During this process, when the outlet of the drain pipe becomes blocked, sewage accumulates in the drain pipe. At this time, the rotating plate rotates in the opposite direction under the action of sewage. During this process, because the side wall of the fixed plate away from the sewage pipe abuts against the side wall of the rotating plate near the sewage pipe, the rotating plate cannot continue to rotate when its side wall abuts against the side wall of the fixed plate. This prevents the rotating plate from blocking the sewage, thereby reducing the probability of sewage flowing into the sewage pipe and thus reducing the probability of sewage flowing into the equipment.

[0022] 3. In this application, when sewage accumulates in the drain pipe, the rotating plate rotates in the opposite direction under the action of the sewage. During this process, the torsion spring reduces the difficulty of rotating the plate. Furthermore, when the water flow forces on both sides of the rotating plate are equal, the torsion spring can break this balance, causing the rotating plate to rotate in the opposite direction, thereby reducing the difficulty of rotating the plate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional structural diagram of the anti-backflow device in an embodiment of this utility model;

[0025] Figure 3 This is a cross-sectional structural diagram of the connector in an embodiment of this utility model;

[0026] Figure 4 yes Figure 3 A magnified structural diagram of A in the middle;

[0027] Figure 5 This is a cross-sectional structural diagram of the connector and threaded rod in an embodiment of this utility model.

[0028] In the diagram: 1. Sewage pipe; 11. Connector; 111. Upper mounting block; 112. Lower mounting block; 12. Drain pipe; 13. Filter screen; 2. Through hole; 21. Rotating groove; 22. Reset groove; 23. Sealing groove; 24. Mounting groove; 3. Anti-backflow device; 31. Rotating rod; 32. Fixing plate; 33. Rotating plate; 4. Torsion spring; 5. Sealing ring; 6. Threaded rod; 7. Rounded corner; 8. Sealing gasket. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figure 1-5 As shown in the illustration, this application discloses a filter backwashing system, including a sewage pipe 1, a connector 11, a drain pipe 12, a filter screen 13, an anti-backflow device 3, a torsion spring 4, a sealing ring 5, and a threaded rod 6. The sewage pipe 1 is a cylindrical structure with its axis horizontal. The connector 11 is fixedly installed on the side wall of the sewage pipe 1, and a through hole 2 is provided through the side wall of the connector 11. The drain pipe 12 is a cylindrical structure with its axis coinciding with the axis of the sewage pipe 1. The drain pipe 12 is fixedly installed at the end of the connector 11 away from the sewage pipe 1, and the sewage pipe 1, the through hole 2, and the drain pipe 12 are directly opposite each other. The filter screen 13 is fixedly installed on the inner wall of the sewage pipe 1 for filtering impurities in the sewage flowing into the sewage pipe 1.

[0031] When the backwashing system is working, the backwash wastewater flows into the drain pipe 1, and then flows out through the drain pipe 1, through hole 2, and drain pipe 12 in sequence. During this process, if the outlet of drain pipe 12 becomes blocked, the wastewater cannot flow out normally, which leads to the accumulation of wastewater in drain pipe 12. In this process, the anti-backflow device 3 blocks the wastewater in drain pipe 12, thereby reducing the probability of wastewater in drain pipe 12 flowing into drain pipe 1, thus reducing the probability of wastewater flowing into the equipment, reducing the phenomenon of wastewater backflow, reducing the probability of backflow wastewater damaging the equipment, and thus extending the service life of the device.

[0032] Symmetrical rotating grooves 21 are provided on the inner wall of the through hole 2. An anti-backflow device 3 is installed inside the through hole 2 to reduce the probability of sewage backflow. The anti-backflow device 3 includes a rotating rod 31, a fixed plate 32, and a rotating plate 33. The rotating rod 31 is a round rod structure with a horizontal axis. There are two rotating rods 31, which are rotatably installed in two rotating grooves 21 respectively. The fixed plate 32 is fixedly installed inside the through hole 2. The rotating plate 33 is fixedly installed on the side wall of the two rotating rods 31 that are close to each other. The rotating plate 33 is rotatably connected to the through hole 2, and the side wall of the fixed plate 32 away from the sewage pipe 1 abuts against the side wall of the rotating plate 33 that is close to the sewage pipe 1.

[0033] As sewage flows out sequentially through the drain pipe 1, through hole 2, and drain pipe 12, the rotating plate 33 rotates under the action of the water flow, causing the sewage to flow into the drain pipe 12 below the fixed plate 32. During this process, if the outlet of the drain pipe 12 becomes blocked, sewage accumulates inside the drain pipe 12. At this time, the rotating plate 33 rotates in the opposite direction under the action of the sewage. During this process, because the side wall of the fixed plate 32 away from the drain pipe 1 abuts against the side wall of the rotating plate 33 near the drain pipe 1, the rotating plate 33 cannot continue to rotate when it abuts against the side wall of the fixed plate 32. This prevents the rotating plate 33 from blocking the sewage, thereby reducing the probability of sewage in the drain pipe 12 flowing into the drain pipe 1, and thus reducing the probability of sewage flowing into the equipment.

[0034] A reset groove 22 is provided on the inner wall of the rotating groove 21. One end of the torsion spring 4 is fixedly set on the inner wall of the reset groove 22, and the other end of the torsion spring 4 is fixedly set on the side wall of the rotating rod 31 away from the rotating plate 33.

[0035] When sewage accumulates in the drain pipe 12, the rotating plate 33 rotates in the opposite direction under the action of the sewage. During this process, the torsion spring 4 reduces the difficulty of rotating the plate 33. In addition, when the water flow forces on both sides of the rotating plate 33 are equal, the torsion spring 4 can break this balance and cause the rotating plate 33 to rotate in the opposite direction, thereby reducing the difficulty of rotating the plate 33.

[0036] A sealing groove 23 is provided on the inner wall of the rotating groove 21. The sealing ring 5 is installed in the sealing groove 23 and is sleeved on the outer wall of the rotating rod 31. The sealing ring 5 is made of rubber.

[0037] The sealing ring 5 reduces the probability of sewage flowing into the rotating groove 21 and the reset groove 22, thereby reducing the probability of damage to the torsion spring 4 and extending the service life of the device.

[0038] The connector 11 includes an upper mounting block 111 and a lower mounting block 112. The upper mounting block 111 is fixedly mounted on the side wall of the sewage pipe 1, and the lower mounting block 112 is mounted on the bottom surface of the upper mounting block 111. Two threaded rods 6 are provided with symmetrical threads that pass through the bottom surface of the lower mounting block 112, and both threaded rods 6 are threadedly connected to the upper mounting block 111.

[0039] When the anti-backflow device 3 is damaged, the operator can remove the mounting block 112 through the threaded rod 6. At this time, the operator can repair the anti-backflow device 3. In this process, the difficulty of repairing the anti-backflow device 3 is reduced, thereby reducing the difficulty of the operator's work.

[0040] To improve the stability of the device, the rotating plate 33 is provided with a rounded corner 7 at the end near the fixed plate 32. The rounded corner 7 reduces the probability of the rotating plate 33 colliding with the fixed plate 32 when it rotates, thereby improving the stability of the device.

[0041] To improve the sealing performance of the device, mounting grooves 24 are provided on the side walls of the sewage pipe 1 and the drain pipe 12 that are close to each other, and sealing gaskets 8 are installed in both mounting grooves 24. The sealing gaskets 8 improve the sealing performance of the device, thereby reducing the probability of sewage leakage.

[0042] The operating principle of the filter backwashing system in this embodiment is as follows: When the backwashing system is working, the backwashing wastewater flows into the drain pipe 1, and then flows out through the drain pipe 1, through hole 2, and drain pipe 12 in sequence. During this process, the rotating plate 33 rotates under the action of the water flow, causing the wastewater to flow into the drain pipe 12 under the fixed plate 32. During this process, when the outlet of the drain pipe 12 becomes blocked, wastewater accumulates in the drain pipe 12. At this time, the rotating plate 33 rotates in the opposite direction under the action of the wastewater. During this process, because the side wall of the fixed plate 32 away from the drain pipe 1 abuts against the side wall of the rotating plate 33 near the drain pipe 1, the rotating plate 33 cannot continue to rotate when it abuts against the side wall of the fixed plate 32. This prevents the rotating plate 33 from blocking the wastewater, thereby reducing the probability of wastewater flowing into the drain pipe 12 and into the drain pipe 1, thus reducing the probability of wastewater flowing into the equipment and reducing the phenomenon of wastewater backflow. This reduces the probability of backflow wastewater damaging the equipment and extends the service life of the device.

[0043] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A filter backwashing system, comprising a drain pipe (1), characterized in that: A connector (11) is fixedly installed on the side wall of the sewage pipe (1). A drain pipe (12) is fixedly installed at the end of the connector (11) away from the sewage pipe (1). A through hole (2) is opened through the side wall of the connector (11). The sewage pipe (1), the through hole (2) and the drain pipe (12) are facing each other. A filter screen (13) is fixedly installed on the inner wall of the sewage pipe (1). An anti-backflow device (3) is installed in the through hole (2) to reduce the probability of sewage backflow.

2. The filter backwashing system according to claim 1, characterized in that: The inner wall of the through hole (2) is symmetrically provided with rotating grooves (21). The anti-backflow device (3) includes two rotating rods (31) respectively rotatably disposed in the two rotating grooves (21), a fixed plate (32) fixedly disposed in the through hole (2), and a rotating plate (33) fixedly disposed on the side wall of the two rotating rods (31) close to each other. The rotating plate (33) is rotatably connected to the through hole (2). The side wall of the fixed plate (32) away from the drain pipe (1) abuts against the side wall of the rotating plate (33) close to the drain pipe (1).

3. A filter backwashing system according to claim 2, characterized in that: A reset groove (22) is provided on the inner wall of the rotating groove (21), and a torsion spring (4) is fixedly provided on the inner wall of the reset groove (22). The other end of the torsion spring (4) is fixedly provided on the side wall of the rotating rod (31) away from the rotating plate (33).

4. A filter backwashing system according to claim 2, characterized in that: A sealing groove (23) is provided on the inner wall of the rotating groove (21), and a sealing ring (5) is installed in the sealing groove (23). The sealing ring (5) is sleeved on the outer wall of the rotating rod (31), and the sealing ring (5) is a sealing ring (5) made of rubber.

5. A filter backwashing system according to claim 1, characterized in that: The connector (11) includes an upper mounting block (111) fixedly mounted on the side wall of the sewage pipe (1) and a lower mounting block (112) mounted on the bottom surface of the upper mounting block (111). The bottom surface of the lower mounting block (112) is threaded with two mutually symmetrical threaded rods (6), and both threaded rods (6) are threadedly connected to the upper mounting block (111).

6. A filter backwashing system according to claim 2, characterized in that: The rotating plate (33) has a rounded corner (7) at one end near the fixed plate (32).

7. A filter backwashing system according to claim 1, characterized in that: The sewage pipe (1) and the drain pipe (12) are provided with mounting grooves (24) on their side walls that are close to each other, and sealing gaskets (8) are installed in both mounting grooves (24).

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