Backflushing device for valveless filter

Abstract

The utility model relates to a backwash device technical field especially, it relates to a backwash device for valveless filter, including filter base, the top of filter base covers filter seal cover, the link position of filter seal cover and filter base is fixed through welding, the side of filter seal cover is provided with built -in cover and penetrates, the link position of built -in cover and filter seal cover is fixed through welding. Through the piston rod telescoping of air cylinder, can drive the telescopic movement of elevating pipe relative to positioning pipe, thereby, make annular seat carry on annular displacement up and down in the periphery of filter core, through the water supply of positioning pipe, can be sent into annular cavity through elevating pipe, then, through the nozzle on the inner ring wall of annular seat to filter core, from the outside to the inside washing, can form the effect of backwashing, through the nozzle with annular seat up and down movement, can guarantee the overall backwashing of filter core up and down position, improve the cleaning quality.

Description

Technical Field

[0001] This utility model relates to the technical field of backwashing devices, and in particular to a backwashing device for a valveless filter. Background Technology

[0002] Valveless filters are filtration devices that do not require valve control and are widely used in water treatment, industrial wastewater treatment, and other fields. Their main characteristics are simple structure, easy operation, and low maintenance costs.

[0003] Valveless filters are economical and practical filtration devices suitable for various water treatment applications. For example, Chinese Patent Publication No. CN203108310U discloses an automatic backwashing agricultural irrigation filter, comprising a housing. Inside the housing, a partition divides the filter into a turbid water chamber and a clear water chamber. The turbid water chamber has an inlet, and the clear water chamber has an outlet. The partition has multiple regularly arranged filter element holes, each in the clear water chamber containing a filter element. The turbid water chamber contains a backwashing device, which includes a drive motor, a backwash drain pipe, a backwash drain valve, and a backwash suction port. The backwash drain pipe is mounted on a shaft and connected to the power output of the drive motor. This invention features a simple structure, automatic backwashing of the filter elements without stopping operation, filter element replacement without opening the filter, segmented filter element replacement, and high operational efficiency.

[0004] Currently, most filters typically feed liquid into the filter from bottom to top during liquid filtration. Impurities are trapped inside the filter element, and the filtered liquid is discharged through the port at the top of the filter. However, with prolonged use, even under the influence of gravity, impurities will not adhere excessively to the inner wall of the filter element. Nevertheless, if the impurities are mainly flocculent or viscous, they will still adhere to the inside of the filter element, causing blockage in the filter element's pores. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a backwashing device for a valveless filter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a backwashing device for a valveless filter, including a filter base, a filter sealing cover covering the top of the filter base, the filter sealing cover and the filter base being fixed by welding at the connection position, an inner sleeve being provided through one side of the filter sealing cover, the inner sleeve being fixed by welding at the connection position with the filter sealing cover, a lifting tube being provided through the inside of the inner sleeve, a positioning tube being slidably sleeved inside the lifting tube, and the outer wall of the positioning tube being fixedly assembled with the upper end of the filter sealing cover by a bracket. The positioning frame is equipped with a solenoid valve, and the valve core of the solenoid valve is embedded inside the positioning frame. The lower end of the lifting pipe is provided with an annular seat, and the annular seat is provided with an annular cavity. The connection between the lifting pipe and the annular seat is fixed by welding, and the lifting pipe is connected to the annular cavity. Several nozzles are provided through the inner wall of the annular seat. The connection between the nozzles and the annular seat is fixed by welding, and the nozzles are connected to the annular cavity. A cylinder is fixed to the outside of the filter sealing cover by a bracket. A piston rod for extension and retraction is provided inside the cylinder. A connecting block is fixed to the end of the piston rod. The outer wall of the connecting block is fixedly assembled with the outer ring wall of the lifting pipe by the bracket.

[0007] In detail, a central hole is provided at the center of the filter base, and a feed port is welded to the lower end of the filter base, which is connected to the central hole.

[0008] In detail, a filter element is fixed on the surface of the filter base. The filter element is located inside the filter sealing cover. The filter element is connected to the central hole and penetrates the interior of the annular seat.

[0009] In detail, a central hole two is provided at the center of the filter sealing cover, and a discharge port is welded and fixed on the top of the filter sealing cover, which is connected to the central hole two.

[0010] In detail, the upper inner wall of the lifting tube is provided with several annular grooves, and a sealing ring is inserted inside the annular groove. The inner wall of the sealing ring is in close contact with the outer wall of the positioning tube.

[0011] In detail, an annular groove 2 is provided on the inner wall of the inner sleeve, and a sealing ring 2 is inserted into the annular groove 2. The inner wall of the sealing ring 2 is in close contact with the outer wall of the lifting pipe. Both the sealing ring 1 and the sealing ring 2 are made of water-swellable rubber material.

[0012] In detail, a filter screen is embedded in the inner wall of the lower end of the lifting tube. The edge of the filter screen is fixed to the inner wall of the lifting tube by screws. The filter screen is made of activated carbon mesh material.

[0013] In detail, a second filter screen is provided at the lower end of the first filter screen. The edge of the second filter screen is fixedly assembled to the inner wall of the lifting tube by screws. The second filter screen is made of non-woven fabric.

[0014] The design scheme proposed in this utility model has the following beneficial effects in application: 1. By extending and retracting the piston rod of the cylinder, the lifting tube can be moved relative to the positioning tube, allowing the lifting tube to move in conjunction with the inner sleeve. This causes the annular seat to move up and down in annular motion around the filter element. By supplying water to the positioning tube and opening the solenoid valve, backwash water can be sent into the annular cavity through the lifting tube. Then, the filter element is rinsed by nozzles distributed on the inner wall of the annular seat. Rinsing from the outside to the inside creates a backwashing effect. As the nozzles move up and down with the annular seat, the entire upper and lower parts of the filter element are backwashed, improving the cleaning quality. 2. During the extension and retraction of the lifting tube and the positioning tube, the sealing ring one ensures that the two can slide and move together while also providing a stable sealing effect. When the lifting tube and the inner sleeve move through each other, the sealing ring two provides a seal to prevent leakage at the connection point between the lifting tube and the inner sleeve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a structural diagram of the built-in sleeve, lifting tube, and positioning tube of this utility model; Figure 4 This is a schematic diagram showing the position of the sealing ring of this utility model; Figure 5 This is a schematic diagram of the shape of the sealing ring of this utility model.

[0016] In the diagram: 1. Filter base; 11. Filter sealing cover; 12. Inner sleeve; 13. Lifting pipe; 14. Positioning pipe; 15. Solenoid valve; 16. Annular seat; 17. Annular cavity; 18. Nozzle; 19. Cylinder; 110. Connecting block; 2. Center hole one; 21. Feed inlet; 22. Filter element; 3. Center hole two; 31. Discharge inlet; 4. Annular groove one; 41. Sealing ring one; 42. Annular groove two; 43. Sealing ring two; 5. Filter screen one; 51. Filter screen two. Detailed Implementation

[0017] 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.

[0018] Reference Figures 1-5A backwashing device for a valveless filter includes a filter base 1, a filter sealing cover 11 covering the top of the filter base 1, the filter sealing cover 11 and the filter base 1 being fixed together by welding, an inner sleeve 12 being provided through one side of the filter sealing cover 11, the inner sleeve 12 and the filter sealing cover 11 being fixed together by welding, a lifting tube 13 being provided through the inside of the inner sleeve 12, a positioning tube 14 being slidably sleeved inside the lifting tube 13, and the outer wall of the positioning tube 14 being fixedly assembled with the upper end of the filter sealing cover 11 by a bracket. A solenoid valve 15 is installed inside the positioning tube 14, and the valve core of the solenoid valve 15 is embedded inside the positioning tube 14. The lower end of the lifting pipe 13 is provided with an annular seat 16, and the annular seat 16 is provided with an annular cavity 17. The connection between the lifting pipe 13 and the annular seat 16 is fixed by welding, and the lifting pipe 13 and the annular cavity 17 are connected. Several nozzles 18 are provided through the inner ring wall of the annular seat 16. The connection between the nozzles 18 and the annular seat 16 is fixed by welding, and the nozzles 18 are connected to the annular cavity 17. A cylinder 19 is fixed to the outside of the filter sealing cover 11 by a bracket. A piston rod for extension and retraction is provided inside the cylinder 19. A connecting block 110 is fixed to the end of the piston rod. The outer wall of the connecting block 110 is fixedly assembled with the outer ring wall of the lifting tube 13 by a bracket.

[0019] It should be further explained that a central hole 2 is provided at the center of the filter base 1, and a feed port 21 is welded to the lower end of the filter base 1. The feed port 21 is connected to the central hole 2. The feed port 21 can not only feed materials, but its end can also be connected to a three-way interface. One interface can be connected to the feed port 21, the second can be connected to the feed pipeline, and the third can be used as a waste discharge interface for backwashing. This is an existing technical means and has not been described in detail in the accompanying drawings.

[0020] It should be further explained that a filter element 22 is fixed on the surface of the filter base 1. The filter element 22 is located inside the filter sealing cover 11. The filter element 22 is connected to the central hole 2 and is connected through the interior of the annular seat 16. The filter element 22 can serve as the core component of the filter to filter the liquid raw materials that need to be filtered.

[0021] It should be further noted that a central hole 3 is provided at the center of the filter sealing cover 11, and a discharge port 31 is welded and fixed on the top of the filter sealing cover 11. The discharge port 31 is connected to the central hole 3, which can ensure the stable discharge of the filter element 22 after filtration. It should be further explained that the upper inner wall of the lifting tube 13 is provided with several annular grooves 4, and a sealing ring 41 is inserted inside the annular groove 4. The inner wall of the sealing ring 41 is in close contact with the outer wall of the positioning tube 14. Through the sealing ring 41, the lifting tube 13 and the positioning tube 14 can be waterproofed and sealed during the sliding connection process.

[0022] It should be further explained that an annular groove 42 is provided on the inner wall of the inner sleeve 12, and a sealing ring 43 is inserted inside the annular groove 42. The inner wall of the sealing ring 43 is in close contact with the outer wall of the lifting pipe 13. Both the sealing ring 41 and the sealing ring 43 are made of water-swellable rubber material. The water-swellable rubber can ensure that the gaps at the corresponding positions of the sealing ring 41 and the sealing ring 43 are sealed when water seeps in.

[0023] It should be further noted that a filter screen 5 is embedded in the lower inner wall of the riser pipe 13. The edge of the filter screen 5 is fixed to the inner wall of the riser pipe 13 by screws. The filter screen 5 is made of activated carbon mesh material, which can purify the odor that may exist in the flushing water during backwashing and avoid affecting the filter element 22.

[0024] It should be further explained that a second filter screen 51 is provided at the lower end of filter screen 5. The edge of filter screen 51 is fixedly assembled to the inner wall of the riser tube 13 by screws. Filter screen 51 is made of non-woven fabric material, which can isolate flocculent impurities that may be contained in the external flushing water during backwashing, and prevent them from entering the filter and adhering to the outside of the filter element 22.

[0025] Working method: The piston rod of cylinder 19 extends and retracts, which drives the lifting pipe 13 to move relative to the positioning pipe 14. The lifting pipe 13 can also move in conjunction with the inner sleeve 12, thereby causing the annular seat 16 to move up and down in annular motion around the filter element 22. Water is supplied to the positioning pipe 14 and the solenoid valve 15 is opened, so that the backwash water can be sent into the annular cavity 17 through the lifting pipe 13. Then, the filter element 22 is rinsed by the nozzles 18 distributed on the inner wall of the annular seat 16. The backwash effect is formed by rinsing from the outside to the inside. As the nozzles 18 move up and down with the annular seat 16, the overall backwashing of the filter element 22 at both the top and bottom is ensured, thus improving the cleaning quality. Filter screen 1 5 can purify the odor that may be present in the flushing water during backwashing, so as to avoid affecting the filter element 22. Filter screen 2 51 can isolate the flocculent impurities that may be contained in the external flushing water during backwashing, so as to prevent them from entering the filter and adhering to the outside of the filter element 22. During the extension and retraction of the lifting tube 13 and the positioning tube 14, the sealing ring 41 ensures that the two can slide and move together while also providing a stable sealing effect. When the lifting tube 13 and the inner sleeve 12 move through each other, the sealing ring 43 provides a seal to prevent leakage at the connection point between the lifting tube 13 and the inner sleeve 12.

[0026] 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 backwashing device for a valveless filter, comprising a filter base (1), characterized in that: The filter base (1) is covered with a filter sealing cover (11). The filter sealing cover (11) and the filter base (1) are connected by welding. An inner sleeve (12) is provided through one side of the filter sealing cover (11). The inner sleeve (12) and the filter sealing cover (11) are connected by welding. A lifting tube (13) is provided through the inside of the inner sleeve (12). A positioning tube (14) is slidably sleeved inside the lifting tube (13). The outer wall of the positioning tube (14) is fixedly assembled with the upper end of the filter sealing cover (11) by a bracket. The positioning tube (14) is equipped with a solenoid valve (15), and the valve core of the solenoid valve (15) is embedded inside the positioning tube (14). The lower end of the lifting pipe (13) is provided with an annular seat (16), and the annular seat (16) is provided with an annular cavity (17). The connection position between the lifting pipe (13) and the annular seat (16) is fixed by welding, and the lifting pipe (13) and the annular cavity (17) are connected. Several nozzles (18) are provided through the inner ring wall of the annular seat (16). The connection position between the nozzles (18) and the annular seat (16) is fixed by welding, and the nozzles (18) and the annular cavity (17) are connected. The filter sealing cover (11) is fixed to the outside of a cylinder (19) by a bracket. The cylinder (19) is provided with a piston rod for extension and retraction. The end of the piston rod is fixed with a connecting block (110). The outer wall of the connecting block (110) is fixedly assembled with the outer ring wall of the lifting tube (13) by a bracket.

2. The backwashing device for a valveless filter according to claim 1, characterized in that: The filter base (1) has a central hole (2) at its center and a feed port (21) is welded to the lower end of the filter base (1). The feed port (21) is connected to the central hole (2).

3. The backwashing device for a valveless filter according to claim 2, characterized in that: The filter base (1) is fixed with a filter element (22), which is located inside the filter sealing cover (11). The filter element (22) is connected to the central hole (2), and the filter element (22) is connected to the interior of the annular seat (16).

4. The backwashing device for a valveless filter according to claim 1, characterized in that: The filter sealing cover (11) has a central hole 2 (3) at its center position, and a discharge port (31) is welded and fixed on the top of the filter sealing cover (11). The discharge port (31) is connected to the central hole 2 (3).

5. A backwashing device for a valveless filter according to claim 1, characterized in that: The upper inner wall of the lifting tube (13) is provided with several annular grooves (4), and a sealing ring (41) is inserted inside the annular groove (4). The inner wall of the sealing ring (41) is in close contact with the outer wall of the positioning tube (14).

6. A backwashing device for a valveless filter according to claim 5, characterized in that: The inner wall of the built-in sleeve (12) is provided with an annular groove (42), and a sealing ring (43) is inserted into the annular groove (42). The inner wall of the sealing ring (43) is in close contact with the outer wall of the lifting tube (13). Both the sealing ring (41) and the sealing ring (43) are made of water-swellable rubber material.

7. A backwashing device for a valveless filter according to claim 1, characterized in that: A filter screen (5) is embedded in the inner wall of the lower end of the lifting tube (13). The edge of the filter screen (5) is fixed to the inner wall of the lifting tube (13) by screws. The filter screen (5) is made of activated carbon mesh material.

8. A backwashing device for a valveless filter according to claim 7, characterized in that: The lower end of the filter screen one (5) is provided with filter screen two (51). The edge of filter screen two (51) is fixedly assembled with the inner wall of the lifting tube (13) by screws. Filter screen two (51) is made of non-woven fabric.

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