A large flow filter capable of automatic backwashing
By designing an automatic backwashing high-flow filter, the problem of filter screen clogging was solved, automatic cleaning of the filter screen was achieved, service life was extended, and production costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU ZHAOBO FILTRATION TECH CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-07
AI Technical Summary
When using existing filters, larger impurities tend to adhere to one side of the filter screen, causing the mesh to become clogged. This requires shutdown for disassembly and replacement, which affects production and increases costs.
Design an automatic backwashing high-flow filter. The filter screen is automatically cleaned through the backwashing mechanism inside the housing. Liquid is collected and sprayed out by the action of the spray chamber and the extraction cylinder, increasing the rinsing area and avoiding the need for additional channels.
It enables automatic backwashing of the filter screen, extends its service life, reduces the frequency of downtime for disassembly, lowers production costs, and improves production efficiency.
Smart Images
Figure CN224462366U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a high-flow-rate filter with automatic backwashing capability. Background Technology
[0002] In industrial production, some solutions have high molecular weight and high viscosity, and sometimes contain impurity particles. These impurity particles not only reduce the yield of products manufactured later, but may also remain in the production equipment. As the operating cycle extends, the accumulated impurity particles in the production equipment will increase. These impurity particles will cause equipment damage and further affect equipment performance, reducing the yield. In order to avoid damage to the equipment by impurity particles, the solution is usually filtered through a filter.
[0003] When existing filters are in use, in addition to accumulating small impurity particles, larger impurities tend to accumulate on one side of the filter screen. These large impurities quickly adhere to one side of the filter screen, causing the filter screen pores to become clogged. This requires cleaning or replacing the filter screen, which necessitates stopping the machine to disassemble the filter screen, which is time-consuming and laborious. Utility Model Content
[0004] The purpose of this invention is to address the following shortcomings in the existing technology: When using existing filters, in addition to accumulating small impurity particles, larger impurities tend to accumulate on one side of the filter screen. These large impurities quickly adhere to one side of the filter screen, causing the filter screen pores to become clogged. This requires disassembling the filter screen, which necessitates stopping the machine to replace the filter screen, affecting normal production. At the same time, the production cost is high and the replacement time is long. Therefore, an automatic backwashing high-flow filter is proposed.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] An automatic backwashing high-flow filter includes a housing, within which a filter screen is disposed; the housing also includes a backwashing mechanism for rinsing the filter screen, the backwashing mechanism comprising a mounting plate, a spray chamber, an extraction cylinder, a piston plate, and an extraction rod.
[0007] The mounting plate is installed behind the filter screen; the spray chamber is slidably connected to the mounting plate, and multiple water outlet holes are opened at the end of the spray chamber near the filter screen; the extraction cylinder is fixedly connected to the mounting plate, and a water inlet pipe is fixedly connected to the side wall of the extraction cylinder; a water outlet pipe is fixedly connected between the extraction cylinder and the spray chamber; both the water inlet pipe and the water outlet pipe are connected to a one-way valve; the piston plate is slidably and sealingly connected to the inner side wall of the extraction cylinder; and the extraction rod is fixedly connected between the spray chamber and the piston plate. During normal filtration, the spray chamber can be controlled to slide away from the extraction cylinder, and the spray chamber can pull the piston plate through the extraction rod. The action creates negative pressure inside the extraction cylinder, drawing the filtered liquid from the housing into the extraction cylinder through the inlet pipe for storage. When backwashing is required after filtration, the spray chamber can be controlled to slide close to the extraction cylinder. The spray chamber, through the extraction rod, pushes the piston plate, squeezing the liquid inside the extraction cylinder out through the outlet pipe and spraying it out through the outlet hole of the spray chamber, thus backwashing the filter screen. The sliding action of the spray chamber achieves the collection and spraying of the liquid required for backwashing, eliminating the need for an additional backwashing channel. Moreover, the sliding action of the spray chamber increases the backwashing area, ensuring an effective backwashing effect.
[0008] Preferably, a first spring is fixedly connected between the spray cavity and the mounting plate. The mounting plate is slidably connected to the housing. A trapezoidal block is fixedly connected to the spray cavity, and a triangular block corresponding to the trapezoidal block is fixedly connected to the housing. When the mounting plate moves toward the triangular block, the triangular block and the trapezoidal block can slide against each other and generate force, thereby pushing the spray cavity to move and compressing the first spring. When the mounting plate moves away from the triangular block, the first spring can push the spray cavity to reset. The sliding action of the spray cavity can be realized by using the back-and-forth sliding action of the mounting plate.
[0009] Preferably, an electromagnet is fixedly connected to the inner wall of the housing, and a magnet corresponding to the electromagnet is fixedly connected to the mounting plate. When a positive current is passed through the electromagnet, the electromagnet can generate magnetism and exert a strong attraction force on the magnet, thereby driving the mounting plate to move towards the electromagnet. When a reverse current is passed through the electromagnet, the electromagnet can generate reverse magnetism and exert a strong repulsive force on the magnet, thereby driving the mounting plate to move away from the electromagnet, thus realizing the back-and-forth movement of the mounting plate.
[0010] Preferably, a fixing block is fixedly connected to the inner side wall of the housing, and a sliding rod is fixedly connected to the mounting plate. The sliding rod is slidably connected to the fixing block, and a second spring is sleeved on the sliding rod. The two ends of the second spring are respectively connected to the mounting plate and the fixing block. This arrangement makes the movement of the mounting plate more stable.
[0011] Preferably, a fixing plate is fixedly connected inside the housing, the filter screen is installed on the inner side wall of the fixing plate, and an impact head corresponding to the fixing plate is fixedly connected to the end of the slide rod away from the mounting plate. When the mounting plate moves toward the filter screen, the impact head on the slide rod can impact the fixing plate to a certain extent, thereby causing the filter screen to shake and causing some impurities to automatically detach, thereby further improving the filter screen cleaning effect.
[0012] Preferably, a limiting rod is fixedly connected to the inner side wall of the mounting plate, and the spray cavity is slidably connected to the limiting rod. The limiting rod not only enables the spray cavity to slide stably, but also serves as the positioning rod for the first spring. The structure is simple and the operation is stable and reliable.
[0013] Preferably, the housing is provided with a collection box below the upper side of the filter screen. The upper and lower ends of the collection box are wider than the middle position. The collection box can collect large particles of impurities, which is convenient for collection and cleaning. The structure of the collection box, which is wide at the upper and lower ends and narrow in the middle, allows the large particles of impurities that are washed down to be sent into the lower space of the collection box. At the same time, they are not easily flowed out from the bottom of the collection box by the water flow during the filtration process.
[0014] The spray chamber, extraction cylinder, piston plate, and extraction rod are each provided in two sets, and are arranged symmetrically on the left and right or up and down.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] The automatic backwashing of the filter screen is achieved through the movement of the mounting plate and spray chamber inside the housing, which improves the service life of the filter screen, avoids frequent shutdowns for disassembly and replacement of the filter screen, and eliminates the need for additional backwashing channels. The overall structure is reasonably laid out. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of a high-flow-rate filter with automatic backwashing proposed in this utility model after one side wall of the housing has been cut off at a certain size.
[0018] Figure 2 This is a schematic diagram of the structure of a high-flow-rate filter with automatic backwashing proposed in this utility model after one side wall of the housing has been cut off to a certain size.
[0019] Figure 3 This is a schematic diagram of the backwashing mechanism for an automatic backwashing high-flow filter proposed in this utility model;
[0020] Figure 4 for Figure 3 A magnified view of part A in the image.
[0021] In the diagram: 1. Housing, 2. Mounting plate, 3. Limiting rod, 4. Spray chamber, 5. Extraction cylinder, 6. Piston plate, 7. Extraction rod, 8. Fixing plate, 9. Fixing block, 10. Sliding rod, 11. Triangular block, 12. Trapezoidal block, 13. Electromagnet, 14. Magnet, 15. Impact head, 16. Inlet pipe, 17. Outlet pipe, 18. First spring, 19. Second spring, 20. Collection box. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] The terms used in this utility model, such as "upper", "lower", "left", "right", "middle" and "one", are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.
[0024] Reference Figures 1-4 A high-flow-rate filter with automatic backwashing includes a housing 1, with an inlet at the front end and an outlet at the rear end. A filter screen is installed inside the housing 1. During filtration, external sewage can enter the housing 1 through the inlet and, after being filtered by the filter screen, clean water flows out of the housing through the outlet.
[0025] The housing 1 has a collection box 20 located below the upper side of the filter screen. The upper and lower ends of the collection box 20 are wider than the middle part, and the surface is smoother. Therefore, large pieces of impurities falling from the upper surface of the filter screen can fall smoothly into the collection box 20 and slide into the bottom of the collection box 20. The impurities that fall to the bottom are not easy to flow out from the bottom of the collection box 20 under the action of water flow. The bottom of the collection box 20 has an openable door so that the collection box 20 can be opened and the collected large pieces of impurities can be cleaned.
[0026] The housing 1 is equipped with a backwashing mechanism for rinsing the filter screen. The backwashing mechanism includes a mounting plate 2, a spray chamber 4, an extraction cylinder 5, a piston plate 6, and an extraction rod 7. There are two spray chambers 4, two extraction cylinders 5, two piston plates 6, and two extraction rods 7.
[0027] Mounting plate 2 is located behind the filter screen. A longitudinally arranged limiting rod 3 is fixedly connected to the inner wall of mounting plate 2. Spray chamber 4 is slidably connected to the limiting rod 3. The inside of spray chamber 4 is hollow and the cavity is small. Multiple water outlet holes are opened at the end of spray chamber 4 near the filter screen. The holes are narrow. When liquid is sprayed out of the water outlet holes in spray chamber 4, the sprayed water flow speed is fast and can generate a certain pressure.
[0028] Two extraction cylinders 5 are fixedly connected to the upper and lower sides of the mounting plate 2, respectively, and correspond to the two spray chambers 4. A water inlet pipe 16 is fixedly connected to the side wall of the extraction cylinder 5. A water outlet pipe 17 is fixedly connected between the extraction cylinder 5 and the corresponding spray chamber 4. Both the water inlet pipe 16 and the water outlet pipe 17 are connected to a one-way valve (not shown in the figure). Through the one-way valve, the water inlet pipe 16 can only allow liquid to flow from the outside to the extraction cylinder 5, and the water outlet pipe 17 can only allow liquid to flow from the extraction cylinder 5 to the spray chamber 4.
[0029] The piston plate 6 is slidably and sealed inside the extraction cylinder 5. The extraction rod 7 is fixedly connected between the spray chamber 4 and the piston plate 6. The extraction rod 7 is slidably connected to one side wall of the extraction cylinder 5. The extraction rod 7 and the extraction cylinder 5 are not sealed. Therefore, when the spray chamber 4 slides away from the extraction cylinder 5, the spray chamber 4 can pull the piston plate 6 through the extraction rod 7, thereby creating a negative pressure inside the extraction cylinder 5. The liquid filtered by the filter screen in the housing 1 will be drawn into the extraction cylinder 5 through the water inlet pipe 16 and stored. When the spray chamber 4 slides close to the extraction cylinder 5, the spray chamber 4 can push the piston plate 6 through the extraction rod 7, and the liquid in the extraction cylinder 5 will be squeezed out through the water outlet pipe 17 and sprayed out from the water outlet hole through the spray chamber 4, thereby backwashing the filter screen.
[0030] In some other embodiments, the limiting rod 3 may not be necessary, and the spray cavity 4 can directly slide and engage with the mounting plate 2. Alternatively, the limiting rod 3 can be positioned laterally, and the spray cavity 4 can slide left and right along the limiting rod 3. The number of spray cavity 4, extraction cylinder 5, piston plate 6, and extraction rod 7 is not limited to two; for example, only one may be provided. A first spring 18 is fixedly connected between the spray cavity 4 and the mounting plate 2. The first spring 18 is specifically mounted on the limiting rod 3, and its two ends abut against the spray cavity 4 and the mounting plate 2, respectively. The mounting plate 2 is slidably connected to the inner wall of the housing 1. A trapezoidal block 12 is fixedly connected to the front end of the spray chamber 4. A triangular block 11 corresponding to the trapezoidal block 12 is fixedly connected inside the housing 1. When the mounting plate 2 slides forward, the triangular block 11 and the trapezoidal block 12 can slide against each other and generate force, thereby pushing the spray chamber 4 to move and compressing the first spring 18. When the mounting plate 2 slides backward, the triangular block 11 and the trapezoidal block 12 gradually separate, and the first spring 18 can push the spray chamber 4 to reset and move. The sliding action of the spray chamber 4 can be realized by using the back-and-forth sliding action of the mounting plate 2.
[0031] In some other embodiments, trapezoidal block 12 and triangular block 11 can also be arranged on the rear side of spray chamber 4. Of course, when trapezoidal block 12 and triangular block 11 are arranged on the front side as in this embodiment, the backwashing effect will be better, because the mounting plate 2 forces the spray chamber 4 to move and spray liquid for backwashing when it moves forward, so that the spray chamber 4 can be closer to the filter screen for backwashing.
[0032] An electromagnet 13 is fixedly connected to the inner wall of the housing 1, and a magnet 14 corresponding to the electromagnet 13 is fixedly connected to the mounting plate 2. When a positive current is applied to the electromagnet 13, the electromagnet 13 generates magnetism and exerts a strong attractive force on the magnet 14, thereby driving the mounting plate 2 to move towards the electromagnet 13. When a reverse current is applied to the electromagnet 13, the electromagnet 13 generates reverse magnetism and exerts a strong repulsive force on the magnet 14, thereby driving the mounting plate 2 to move away from the electromagnet 13. In other words, the forward and backward movement of the mounting plate 2 is achieved by the interaction force between the electromagnet 13 and the magnet 14.
[0033] The housing 1 is fixedly connected to the left and right ends of the front of the mounting plate 2, and the mounting plate 2 is fixedly connected to the left and right ends of the front of the mounting plate 2, and the sliding rod 10 is slidably connected to the fixing block 9. The sliding rod 10 is also sleeved with a second spring 19, and the two ends of the second spring 19 abut against the mounting plate 2 and the fixing block 9, respectively. When the electromagnet 13 drives the mounting plate 2 to move in the direction of the electromagnet 13, it will compress the second spring 19. When the electromagnet 13 drives the mounting plate 2 to move away from the electromagnet 13, it will stretch the second spring 19. The second spring 19 can provide elastic buffering force, making the movement of the mounting plate 2 more stable.
[0034] A fixing plate 8 is fixedly connected inside the housing 1. The filter screen is installed on the inner wall of the fixing plate 8. The fixing plate 8 is made of materials such as rubber and engineering plastics, has a certain degree of elasticity, and has good sealing and deformation capabilities. The end of the slide rod 10 away from the mounting plate 2 is fixedly connected to an impact head 15 corresponding to the fixing plate 8. When the mounting plate 2 moves forward, the impact head 15 can impact the fixing plate 8, thereby causing the fixing plate 8 to vibrate and shake off some of the large impurities adsorbed on the filter screen. The impact head 15 is also made of elastic material, so it will not damage the fixing plate 8 during impact.
[0035] In use, external sewage can enter the housing 1 through the inlet, and after being filtered by the filter screen, clean water flows out of the housing through the outlet.
[0036] After a period of filtration, the upper surface of the filter screen will adsorb impurities of different sizes, so the filter screen needs to be backwashed.
[0037] First, a reverse current is passed through the electromagnet 13, which generates magnetism and repels the magnet 14, thereby pushing the mounting plate 2 to move backward. As a result, the trapezoidal block 12 on the mounting plate 2 moves away from the triangular block 11, and the squeezing force on the first spring 18 disappears. Under the elastic force of the first spring 18, the spray chamber 4 moves along the limiting rod 3 towards the center and moves to the center of the mounting plate 2. The spray chamber 4 drives the extraction rod 7 and the piston plate 6 to move towards the center. The one-way valve in the water inlet pipe 16 opens and the one-way valve in the water outlet pipe 17 closes. The filtered clean water enters the extraction cylinder 5 through the water inlet pipe 16.
[0038] Then, the filtration process ends, and a positive current is passed through the electromagnet 13. The electromagnet 13 generates magnetism and attracts the magnet 14, thereby pushing the mounting plate 2 forward. The trapezoidal block 12 and the triangular block 11 on the spray chamber 4 slide together, causing the spray chamber 4 to move upward along the limiting rod 3. The spray chamber 4 drives the extraction rod 7 and the piston plate 6 to move to both sides. The one-way valve in the inlet pipe 16 closes, and the one-way valve in the outlet pipe 17 opens. Clean water in the extraction cylinder 5 enters the spray chamber 4 along the outlet pipe 17 and sprays out from the spray hole. The sprayed water is evenly sprayed from the center to both sides, backwashing the filter screen. At the same time, the impact head 15 will impact the fixed plate 8. Due to the greater resistance, The impact force of the impact head 15 on the fixed plate 8 is not high, so it will not damage the fixed plate 8 and the filter screen. It will only produce slight vibration. Under the action of water flow impact and vibration, due to frequent backwashing and cleaning, the impurities are not tightly adsorbed and there are not many impurities adsorbed. They will not accumulate and form stubborn impurities that are difficult to remove. Just the backwashing and vibration of the water flow can make them fall off, causing large pieces of impurities attached to the filter screen to fall into the collection box 20. Just open the box door at the bottom of the collection box 20 periodically to remove the accumulated impurities. The disassembly cycle is greatly increased, there is no need to stop the machine frequently, the replacement time is also very short, and the operation is simple, time-saving and labor-saving.
[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly.
[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A high-flow-rate filter with automatic backwashing capability, comprising a housing (1), characterized in that, The housing (1) is equipped with a filter screen; The housing (1) is provided with a backwashing mechanism for rinsing the filter screen. The backwashing mechanism includes a mounting plate (2), a spray chamber (4), an extraction cylinder (5), a piston plate (6), and an extraction rod (7). The mounting plate (2) is installed behind the filter screen; The spray chamber (4) is slidably connected to the mounting plate (2), and the spray chamber (4) has multiple water outlet holes at one end near the filter screen; The extraction cylinder (5) is fixedly connected to the mounting plate (2). A water inlet pipe (16) is fixedly connected to the side wall of the extraction cylinder (5). A water outlet pipe (17) is fixedly connected between the extraction cylinder (5) and the spray chamber (4). Both the water inlet pipe (16) and the water outlet pipe (17) are connected to a one-way valve. The piston plate (6) is slidably connected to the inner wall of the extraction cylinder (5), and the extraction rod (7) is fixedly connected between the spray chamber (4) and the piston plate (6).
2. The high-flow-rate filter with automatic backwashing capability according to claim 1, characterized in that, A first spring (18) is connected between the spray chamber (4) and the mounting plate (2); The mounting plate (2) is slidably connected to the housing (1) in the front and back. A trapezoidal block (12) is fixedly connected to the spray cavity (4). A triangular block (11) corresponding to the trapezoidal block (12) is fixedly connected inside the housing (1). The triangular block (11) and the trapezoidal block (12) slide together to push the spray cavity (4) to move and compress the first spring (18).
3. The high-flow-rate filter with automatic backwashing capability according to claim 1, characterized in that, An electromagnet (13) is fixedly connected to the inner wall of the housing (1), and a magnet (14) corresponding to the electromagnet (13) is fixedly connected to the mounting plate (2). When the electromagnet (13) is energized, it can drive the mounting plate (2) to move.
4. A high-flow-rate filter with automatic backwashing capability according to claim 3, characterized in that, A fixing block (9) is fixedly connected to the inner wall of the housing (1), and a sliding rod (10) is fixedly connected to the mounting plate (2). The sliding rod (10) is slidably connected to the fixing block (9), and a second spring (19) is provided on the outer sleeve of the sliding rod (10). The two ends of the second spring (19) are respectively connected to the mounting plate (2) and the fixing block (9).
5. A high-flow-rate filter with automatic backwashing capability according to claim 4, characterized in that, A fixing plate (8) is fixedly connected inside the housing (1). The filter screen is installed on the inner side wall of the fixing plate (8). An impact head (15) corresponding to the fixing plate (8) is fixedly connected to one end of the slide rod (10) away from the mounting plate (2).
6. A high-flow-rate filter with automatic backwashing capability according to claim 1, characterized in that, A limiting rod (3) is fixedly connected to the inner wall of the mounting plate (2), and the spray chamber (4) is slidably connected to the limiting rod (3).
7. A high-flow-rate filter with automatic backwashing capability according to claim 1, characterized in that, The housing (1) has a collection box (20) located below the upstream side of the filter screen.
8. A high-flow-rate filter with automatic backwashing capability according to claim 1, characterized in that, The spray chamber (4), extraction cylinder (5), piston plate (6), and extraction rod (7) are each provided in two sets.