Novel backwashing mounting structure for controlling self-cleaning filter

Abstract

The utility model discloses a novel backwash mounting structure for controlling a self-cleaning filter. The novel backwash mounting structure comprises a self-cleaning filter body, a rotary valve is mounted in the self-cleaning filter body; a speed reducing motor, a filter chamber and a filter element assembly are mounted on the self-cleaning filter body; cams are mounted at the upper ends of the rotary valves; a travel switch is mounted on one side of the cam; an inlet flange of the self-cleaning filter is arranged on the base, and an outlet flange of the self-cleaning filter is arranged on one side of the self-cleaning filter body; an air storage chamber is connected to one side of the base; the gas storage chamber is connected with the backwashing assembly through a pipeline; one side of the backwashing assembly extends into the self-cleaning filter body through a pipeline; the backwashing assembly is arranged on the outer side of the whole self-cleaning filter body. According to the device, an external mounting structure is utilized, all parts of a backwash control structure originally assembled in a rotary valve body are moved out and mounted on the outer side of the self-cleaning filter, so that the rotary valve and the backwash control structure are independently mounted, the mounting position of the air storage chamber is optimized, independent mounting of the rotary valve, the backwash control structure and the self-cleaning filter is realized, and maintenance is simplified.

Description

Technical Field

[0001] This utility model relates to a backwashing structure, specifically a novel control structure for backwashing a self-cleaning filter. Background Technology

[0002] The existing self-cleaning filter backwashing structure involves installing the backwashing control components inside the rotary valve core. The rotary valve is then installed in an air storage chamber containing compressed air, and finally, these two components are connected to the filter body via fasteners (see reference). Figure 1 When any of the three components of the self-cleaning filter control backwashing structure—the rotary valve, the air chamber—needs to be disassembled for maintenance, the entire assembly must be disassembled from top to bottom before maintenance can be performed. The three components are interconnected and cannot be disassembled and maintained individually, which increases maintenance time and costs. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a novel control structure for backwashing a self-cleaning filter, thereby solving the aforementioned technical problems.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel control structure for backwashing a self-cleaning filter, comprising a self-cleaning filter body; a rotary valve installed inside the self-cleaning filter body; a geared motor, a filter chamber, and a filter element assembly installed on the self-cleaning filter body; a cam installed at the upper end of the rotary valve; a limit switch installed on one side of the cam; an inlet flange of the self-cleaning filter body located on a base, and an outlet flange located on one side of the self-cleaning filter body; an air storage chamber connected to one side of the base; the air storage chamber connected to a backwashing assembly via a pipeline; one side of the backwashing assembly extending into the self-cleaning filter body via a pipeline; and the backwashing assembly located on the outer side of the entire self-cleaning filter body.

[0005] Furthermore, the backwashing assembly is a linkage valve assembly, which includes a drain valve, a pneumatic actuator, and a compressed air control valve; the pneumatic actuator is connected to the drain valve and the compressed air control valve; the compressed air control valve is located within the pneumatic system.

[0006] Furthermore, the upper end of the rotary valve is connected to the output shaft of the geared motor; the lower end is a hollow sewage pipe; the lower part of the sewage pipe is connected to the sewage outlet; and the sewage valve is located at the connection position between the lower part of the sewage pipe and the sewage outlet.

[0007] Furthermore, the pneumatic system includes an air source, a first check valve, an air filter, a second check valve, an actuator solenoid valve, a pressure reducing valve, an air storage chamber, and pipelines; the air storage chamber is connected to the pressure reducing valve via a pipeline; the actuator solenoid valve is connected to the pressure reducing valve via a pipeline; the other side of the actuator solenoid valve is connected to a pneumatic actuator; the air storage chamber is connected to the self-cleaning filter body via an air source and pipelines; a compressed air control valve for a backwashing assembly is provided between the air storage chamber and the self-cleaning filter body.

[0008] Furthermore, the gas storage chamber is equipped with a pressure gauge and a safety valve.

[0009] Furthermore, the filter chamber inlet and outlet are also equipped with differential pressure transmitters for measuring the pressure difference between the inlet and outlet; a shut-off valve is installed between the differential pressure transmitter and the filter chamber.

[0010] The beneficial effects of this utility model are: This device utilizes an external installation structure to move all the components of the control backwashing structure, which were originally assembled inside the rotary valve body, out and install them on the outside of the self-cleaning filter. This achieves independent installation of the rotary valve and the control backwashing structure components, optimizes the installation position of the air storage chamber, realizes independent installation of the three components, and simplifies maintenance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure for controlling backwashing in an existing self-cleaning filter;

[0012] Figure 2 This is a schematic diagram of the structure of this utility model;

[0013] Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model.

[0014] In the diagram: 1. Check valve one, 2. Air filter, 3. Check valve two, 4. Pressure reducing valve, 5. Safety valve, 6. Pressure gauge, 7. Actuator solenoid valve, 8. Compressed air control valve, 9. Pneumatic actuator, 11. Differential pressure transmitter, 12. Shut-off valve, 20. Air storage chamber, 21. Base, 22. Self-cleaning filter body, 23. Filter element assembly, 24. Rotary valve, 25. Filter chamber, 26. Gear motor, 27. Cam, 28. Limit switch. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0017] As shown in the figure Figure 2 and Figure 3 As shown, a novel control structure for backwashing a self-cleaning filter includes a self-cleaning filter body 22; a rotary valve 24 is installed inside the self-cleaning filter body 22; a geared motor 26, a filter chamber 25, and a filter element assembly 23 are installed on the self-cleaning filter body 22; a cam 27 is installed on the upper end of the rotary valve 24; a limit switch 28 is installed on one side of the cam 27; the inlet flange of the self-cleaning filter body 22 is located on a base 21, and its outlet flange is located on one side of the self-cleaning filter body 22; an air storage chamber 20 is connected to one side of the base 21; the air storage chamber 20 is connected to a backwashing assembly through a pipeline; one side of the backwashing assembly extends into the self-cleaning filter body 22 through a pipeline; the backwashing assembly is located on the outside of the entire self-cleaning filter body 22.

[0018] In this preferred embodiment, the backwashing assembly is a linkage valve assembly, which includes a drain valve, a pneumatic actuator 9, and a compressed air control valve 8; the pneumatic actuator 9 is connected to the drain valve and the compressed air control valve 8; the compressed air control valve 8 is located within the pneumatic system.

[0019] In this preferred embodiment, the upper end of the rotary valve 24 is connected to the output shaft of the reduction motor 26; the lower end is a hollow sewage pipe; the lower part of the sewage pipe is connected to the sewage outlet; and the sewage valve is located at the connection position between the lower part of the sewage pipe and the sewage outlet.

[0020] In this preferred embodiment, the pneumatic system includes an air source, a one-way valve 1, an air filter 2, a two-way valve 3, an actuator solenoid valve 7, a pressure reducing valve 4, an air storage chamber 20, and pipelines; the air storage chamber 20 is connected to the pressure reducing valve 4 via a pipeline; the actuator solenoid valve 7 is connected to the pressure reducing valve 4 via a pipeline; the other side of the actuator solenoid valve 7 is connected to a pneumatic actuator 9; the air storage chamber 20 is connected to the self-cleaning filter body 22 via an air source and pipelines; a compressed air control valve 8 for a backwashing assembly is provided between the air storage chamber 20 and the self-cleaning filter body 22.

[0021] In this preferred embodiment, a pressure gauge 6 and a safety valve 5 are provided on the gas storage chamber 20.

[0022] In this preferred embodiment, the filter chamber 25 is further provided with a differential pressure transmitter 11 for measuring the pressure difference between the inlet and outlet; a shut-off valve 12 is provided between the differential pressure transmitter 11 and the filter chamber 25.

[0023] Working principle:

[0024] The working principle of a self-cleaning filter: A self-cleaning filter can be divided into a normal filtration state and a backwashing state.

[0025] Normal filtration state of the filter:

[0026] The filter medium flows from the inlet flange into the base 21 and then into the filter element assembly 23. The liquid flows from the outside of the screen to the inside of the filter element, and the impurities are retained by the screen. The filtered liquid flows through the filter chamber 25 and from the filter body 22 to the filter outlet.

[0027] The compressed air used for backwashing flows through check valve 1, air filter 2, and check valve 3, then through pressure reducing valve 4 to reach air storage chamber 20. At the same time, it passes through actuator solenoid valve 7 to reach one side of the drive head. The drive head is equipped with two valves that can be opened or closed at the same time, namely a drain valve and an air control valve.

[0028] In this state, the drain valve and air control valve are closed, and compressed air accumulates in the air storage chamber in preparation for backwashing.

[0029] Backwashing process:

[0030] As the filter operates for longer periods, more and more impurities are trapped on the filter element, creating an increasing pressure difference between the filter inlet and outlet. When the pressure difference reaches a certain value, the pressure difference transmitter 11 sends a signal to trigger the electrical system and begin a cleaning cycle.

[0031] When the cleaning cycle begins, the geared motor 26 is activated, and the rotary valve 24 is switched from the standby filter chamber to the filter chamber 5 that needs to be rinsed. The clean filter element in the standby filter chamber participates in filtration, causing the pressure difference to drop immediately. Once the rotary valve is switched to the filter chamber that needs to be rinsed, it stops operating. The electrically controlled actuator solenoid valve 7 is energized, causing the air in the original chamber of the drive head to be emptied, and compressed air to enter on the other side. Driven by the drive head, the drain valve and the air control valve rotate 90° simultaneously, opening the drain port and the air control valve. Compressed air enters the self-cleaning filter body 22 through the opened air control valve, and then enters the filter chamber 5 through the rotary valve 24. The compressed air in the air storage chamber causes the liquid in the filter chamber to flow back to the filter element, washing away the impurities adhering to the filter screen. After a short backwashing period, the actuator solenoid valve 7 is de-energized, and the drain port and air port are closed simultaneously.

[0032] In this device, the rotary valve 24 is installed inside the self-cleaning filter body 22, eliminating the need for internal backwash control components. The air storage chamber 20 is optimally positioned at the bottom of the filter. The rotary valve 24, backwash structure, and air storage chamber 20 are installed in three separate locations, allowing for independent installation and simplified maintenance.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel control structure for backwashing a self-cleaning filter, characterized in that, The filter includes a self-cleaning filter body (22); a rotary valve (24) is installed inside the self-cleaning filter body (22); a geared motor (26), a filter chamber (25), and a filter element assembly (23) are installed on the self-cleaning filter body (22); a cam (27) is installed on the upper end of the rotary valve (24); a limit switch (28) is installed on one side of the cam (27); the inlet flange of the self-cleaning filter body (22) is located on the base (21), and its outlet flange is located on one side of the self-cleaning filter body (22); an air storage chamber (20) is connected to one side of the base (21); the air storage chamber (20) is connected to a backwashing assembly through a pipeline; one side of the backwashing assembly is connected to the self-cleaning filter body (22) through a pipeline; the backwashing assembly is located on the outside of the entire self-cleaning filter body (22).

2. The novel control self-cleaning filter backwashing installation structure according to claim 1, characterized in that, The backwashing component A is a linkage valve component, which includes a drain valve, a pneumatic actuator (9), and a compressed air control valve (8); the pneumatic actuator (9) is connected to the drain valve and the compressed air control valve (8); the compressed air control valve (8) is located in the pneumatic system.

3. The novel control structure for backwashing a self-cleaning filter according to claim 1, characterized in that, The upper end of the rotary valve (24) is connected to the output shaft of the geared motor (26); the lower end is a hollow sewage pipe; the lower part of the sewage pipe is connected to the sewage outlet; the sewage valve is set at the connection position between the lower part of the sewage pipe and the sewage outlet.

4. The novel control structure for backwashing a self-cleaning filter according to claim 1, characterized in that, The pneumatic system includes an air source, a one-way valve (1), an air filter (2), a two-way valve (3), an actuator solenoid valve (7), a pressure reducing valve (4), an air storage chamber (20), and pipelines; the air storage chamber (20) is connected to the pressure reducing valve (4) through a pipeline; the actuator solenoid valve (7) is connected to the pressure reducing valve (4) through a pipeline; the other side of the actuator solenoid valve (7) is connected to the pneumatic actuator (9); the air storage chamber (20) is connected to the self-cleaning filter body (22) through an air source and a pipeline; a compressed air control valve (8) for backwashing components is provided between the air storage chamber (20) and the self-cleaning filter body (22).

5. The novel control structure for backwashing a self-cleaning filter according to claim 1, characterized in that, The gas storage chamber (20) is equipped with a pressure gauge (6) and a safety valve (5).

6. The novel control structure for backwashing a self-cleaning filter according to claim 1, characterized in that, The filter chamber (25) is also equipped with a differential pressure transmitter (11) for measuring the pressure difference between the inlet and outlet; a shut-off valve (12) is provided between the differential pressure transmitter (11) and the filter chamber (25).

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