Pipeline structure with backwashing function

Abstract

The utility model relates to the technical field of pipeline structures, in particular to a pipeline structure with a backwashing function, which comprises a main pipeline, a filter is mounted on the main pipeline, a first valve and a second valve are respectively mounted on two sides of the filter on the main pipeline, and a pressure relief pipe communicated with the main pipeline is arranged between the first valve and the filter. A third valve is mounted on the pressure relief pipe; and a pressure storage tank communicated with the main pipeline is arranged between the second valve and the filter. When the filter needs to be cleaned, liquid or gas accumulated in the pressure storage tank is discharged towards the pressure relief pipe, in the discharging process, the flow direction of the liquid or gas is opposite to that of normal conveying, the filter can be reversely washed, and therefore impurities attached to the filter are discharged through the pressure relief pipe; therefore, the service life of the filter can be prolonged. Only a short time is needed for one-time back flushing, and the overall production efficiency of the equipment is basically not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline structures, in particular to a pipeline structure with a backwashing function. Background Art

[0002] Filters and detection devices are the most common devices on pipelines that transport media. Filters are usually installed at the inlet end of other equipment such as pressure reducing valves, pressure relief valves, water level valves, and Fanggong filters. The filter has a filter cartridge with a certain specification of filter mesh, and its impurities are blocked. The detection device is installed at a specific position on the pipeline according to the detection requirements.

[0003] In the existing field of filtering and detecting devices, the original liquid passes through the filter and the detecting device in one direction, and the filtered material is precipitated and accumulated on the filter and the detecting device, which will affect the continued use and measurement accuracy.

[0004] In the prior art, when the amount of precipitated and accumulated materials on the filter and the detection device reaches a certain level, the filter and the detection device need to be cleaned or replaced so that the filter and the detection device can continue to be used. However, the current cleaning method requires the filter and the detection device to be disassembled for cleaning at most. This not only causes the entire device to be unusable during the cleaning process, but frequent cleaning also greatly reduces work efficiency and delays equipment operation. Utility Model Content

[0005] The utility model aims to provide a pipeline structure with a backwashing function, so as to solve the problem in the prior art that the filter and the detection device in the pipeline are troublesome to clean, thus delaying the working efficiency of the equipment.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A pipeline structure with a backwashing function comprises a main pipeline, a filter is installed on the main pipeline, a first valve and a second valve are installed on both sides of the filter respectively, a pressure relief pipe connected to the main pipeline is arranged between the first valve and the filter, and a third valve is installed on the pressure relief pipe; a pressure storage tank connected to the main pipeline is arranged between the second valve and the filter.

[0008] A further technical solution is that the first valve is a first electrically controlled valve, the second valve is a second electrically controlled valve, the third valve is a third electrically controlled valve, and the first electrically controlled valve, the second electrically controlled valve and the third electrically controlled valve are all controlled by a controller.

[0009] A further technical solution is that an adjustable partition is provided in the pressure accumulator tank, and the adjustable partition is used to divide the pressure accumulator tank into a first chamber and a second chamber with variable volume. The first chamber is connected to the main pipeline through a connecting pipe, and an air pipe connected to the second chamber is provided outside the pressure accumulator tank.

[0010] A further technical solution is that the adjustable partition is an elastic membrane, and the edge of the elastic membrane is connected to the inner wall of the pressure accumulator tank.

[0011] A further technical solution is that the adjustable partition is a piston, and a sliding rod is provided in the pressure accumulator tank from the first chamber to the second chamber, one end of the sliding rod is connected to the cavity wall of the second chamber away from the first chamber, and a sliding hole matching the sliding rod is provided in the middle of the piston, and the piston is slidably mounted on the sliding rod through the sliding hole, and the edge of the piston slides and fits with the inner wall of the pressure accumulator tank; a spring is mounted on the sliding rod, one end of the spring is connected to the cavity wall of the second chamber, and the other end is connected to the piston.

[0012] A further technical solution is that a fourth valve for controlling the on-off of the air pipe is arranged on the air pipe; and a sealing layer is arranged around the edge of the piston.

[0013] A further technical solution is that one end of the sliding rod placed in the first chamber is provided with a supporting rod connected to the cavity wall of the first chamber.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects: 1. When filtering normally, the first valve and the second valve are opened, and the third valve is closed. The liquid or gas in the main pipeline is transported normally. At this time, the pressure accumulator tank is connected to the main pipeline, so that the pressure in the pressure accumulator tank is consistent with that in the main pipeline. When the filter needs to be cleaned, the second valve is closed first. At this time, since the liquid or gas in the main pipeline cannot be transported away through the second valve, the pressure in the main pipeline gradually increases, and the pressure in the pressure accumulator tank gradually increases. Then the first valve is closed, and the third valve is opened. At this time, the liquid or gas accumulated in the pressure accumulator tank is discharged toward the pressure relief pipe. During the discharge process, the flow direction of the liquid or gas is opposite to the normal transportation, and the filter can be reversely flushed, so that the impurities attached to the filter are discharged through the pressure relief pipe, which can extend the service life of the filter; 2. It only takes a short time to perform a reverse flush, which has little effect on the overall production efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of a pipeline structure with a backwashing function.

[0016] Figure 2 This is another schematic diagram of a pipeline structure with backwashing function according to the utility model.

[0017] Figure 3 The utility model is a cross-sectional schematic diagram of a pressure accumulator tank with a pipeline structure having a backwashing function.

[0018] Figure 4Another cross-sectional schematic diagram of a pressure accumulator tank with a pipeline structure having a backwashing function according to the utility model.

[0019] Icons: 1-main pipeline, 2-filter, 3-first valve, 4-second valve, 5-pressure relief pipe, 6-third valve, 7-pressure accumulator, 8-controller, 9-air pipe, 10-first chamber, 11-second chamber, 12-elastic membrane, 13-piston, 14-sliding rod, 15-sliding hole, 16-spring, 17-fourth valve, 18-sealing layer, 19-support rod, 20-detection module. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Figures 1 to 4 Shown is an embodiment of the utility model.

[0022] Embodiment 1:

[0023] like Figure 1As shown, a pipeline structure with a backwashing function includes a main pipeline 1, a filter 2 is installed on the main pipeline 1, a first valve 3 and a second valve 4 are installed on both sides of the filter 2 of the main pipeline 1, a pressure relief pipe 5 connected to the main pipeline 1 is arranged between the first valve 3 and the filter 2, and a third valve 6 is installed on the pressure relief pipe 5; a pressure accumulator 7 connected to the main pipeline 1 is arranged between the second valve 4 and the filter 2. When filtering normally, the first valve 3 and the second valve 4 are opened, and the third valve 6 is closed, and the liquid or gas in the main pipeline 1 is transported normally. At this time, the pressure accumulator 7 is connected to the main pipeline 1, so that the pressure in the pressure accumulator 7 is consistent with that in the main pipeline 1. When the filter 2 needs to be cleaned, the second valve 4 is closed first. At this time, since the liquid or gas in the main pipeline 1 cannot be transported away through the second valve 4, the pressure in the main pipeline 1 gradually increases, and the pressure in the pressure accumulator 7 gradually increases. Then the first valve 3 is closed, and the third valve 6 is opened. At this time, the liquid or gas accumulated in the pressure accumulator 7 is discharged toward the pressure relief pipe 5. During the discharge process, the flow direction of the liquid or gas is opposite to the normal transportation, and the filter 2 can be reversely flushed, so that the impurities attached to the filter 2 are discharged through the pressure relief pipe 5, which can extend the service life of the filter 2. It only takes a short time to perform a reverse flushing, and it has basically no effect on the overall production efficiency of the equipment. Backwashing the filter 2, from the inside to the outside, has a better flushing efficiency than surface flushing. Backwashing is more thorough and saves more water. The filter screen of the filter 2 is cleaned more thoroughly, the interval between use and cleaning is longer, the service life of the disposable filter element is extended, and the use cost is reduced. In addition to flushing the filter 2.

[0024] Embodiment 2:

[0025] On the basis of Example 1, Figure 2 As shown, the filter 2 can be replaced with a detection module 20. After long-term use, some impurities will adhere to the surface of the detection module 20, resulting in a decrease in detection accuracy. After backwashing, the detection accuracy of the detection module 20 can be restored. In the prior art, although a filter is added in front of the detection module 20 to prevent impurities from adhering to the detection module 20, this will cause the particle size in the liquid or air to decrease, change the sample, and distort the detection.

[0026] Embodiment 3:

[0027] On the basis of the above-mentioned embodiment, the first valve 3 is a first electrically controlled valve, the second valve 4 is a second electrically controlled valve, the third valve 6 is a third electrically controlled valve, and the first electrically controlled valve, the second electrically controlled valve and the third electrically controlled valve are all controlled by the controller 8. The first valve 3, the second valve 4 and the third valve 6 on the pipeline are installed at different positions or positions that are inconvenient for manual operation, and can be remotely controlled by the controller 8, which provides convenience of operation.

[0028] An adjustable partition is provided in the pressure accumulator 7, and the adjustable partition is used to separate the pressure accumulator 7 into a first chamber 10 and a second chamber 11 with variable volumes. The first chamber 10 is connected to the main pipeline 1 through a connecting pipe, and an air pipe 9 connected to the second chamber 11 is provided outside the pressure accumulator 7. When the pressure in the main pipeline 1 rises, the volume of the first chamber 10 increases and the volume of the second chamber 11 decreases to adjust the pressure, so that the pressure in the first chamber 10 increases while more liquid or gas can be accumulated for flushing the filter 2. By providing the air pipe 9, when the volume of the second chamber 11 decreases, excess air can be discharged to avoid excessive air affecting the increase in the volume of the second chamber 11.

[0029] Embodiment 4:

[0030] like Figure 3 As shown, based on the above-mentioned embodiment, the adjustable partition is an elastic membrane 12, and the edge of the elastic membrane 12 is connected to the inner wall of the pressure accumulator 7. By providing the elastic membrane 12, the elastic membrane 12 can increase the volume of the first chamber 10 by increasing the surface area when the pressure in the first chamber 10 increases, and accumulate elastic potential energy. When backwashing, the elastic membrane 12 shrinks to reduce the volume of the first chamber 10, so that the liquid or gas in the first chamber 10 enters the main pipeline 1 to flush the filter 2.

[0031] Embodiment 5:

[0032] Based on the above embodiments, Figure 4 As shown, the adjustable partition is a piston 13, and a sliding rod 14 is provided in the pressure accumulator 7 from the first chamber 10 to the second chamber 11. One end of the sliding rod 14 is connected to the cavity wall of the second chamber 11 away from the first chamber 10. A sliding hole 15 matching the sliding rod 14 is provided in the middle of the piston 13. The piston 13 is slidably sleeved on the sliding rod 14 through the sliding hole 15, and the edge of the piston 13 is slidably fitted with the inner wall of the pressure accumulator 7; a spring 16 is sleeved on the sliding rod 14, one end of the spring 16 is connected to the cavity wall of the second chamber 11, and the other end is connected to the piston 13. With such a setting, when the pressure in the first chamber 10 increases, the piston 13 moves toward the second chamber 11, and the spring 16 is compressed during the movement, so that the spring 16 accumulates elastic potential energy. During backwashing, the spring 16 pushes the piston 13 to move toward the first chamber 10, so that the liquid or gas in the first chamber 10 flushes the filter 2. By providing the sliding rod 14, the piston 13 can be made more stable when moving.

[0033] The air pipe 9 is provided with a fourth valve 17 for controlling the opening and closing of the air pipe 9; a sealing layer 18 is provided around the edge of the piston 13. By providing the sealing layer 18, the edge of the piston 13 can be better sealed when the piston 13 moves. By providing the fourth valve 17, the air pipe 9 can be closed, and when the pressure accumulator 7 leaks, the liquid or gas in the pressure accumulator 7 is prevented from being discharged from the exhaust pipe 9.

[0034] One end of the sliding rod 14 placed in the first chamber 10 is provided with a support rod 19 connected to the cavity wall of the first chamber 10. By providing the support rod 19, the sliding rod 14 can be stably supported.

[0035] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A pipeline structure with a backwashing function, comprising a main pipeline (1), a filter (2) being installed on the main pipeline (1), characterized in that: The main pipeline (1) is provided with a first valve (3) and a second valve (4) on both sides of the filter (2), respectively; a pressure relief pipe (5) connected to the main pipeline (1) is provided between the first valve (3) and the filter (2), and a third valve (6) is provided on the pressure relief pipe (5); and a pressure storage tank (7) connected to the main pipeline (1) is provided between the second valve (4) and the filter (2).

2. A pipeline structure with backwashing function according to claim 1, characterized in that: The first valve (3) is a first electrically controlled valve, the second valve (4) is a second electrically controlled valve, the third valve (6) is a third electrically controlled valve, and the first electrically controlled valve, the second electrically controlled valve and the third electrically controlled valve are all controlled by a controller (8).

3. A pipeline structure with backwashing function according to claim 1, characterized in that: An adjustable partition is provided inside the pressure accumulator tank (7), and the adjustable partition is used to divide the pressure accumulator tank (7) into a first chamber (10) and a second chamber (11) with variable volumes. The first chamber (10) is connected to the main pipeline (1) via a connecting pipe, and an air pipe (9) connected to the second chamber (11) is provided outside the pressure accumulator tank (7).

4. A pipeline structure with backwashing function according to claim 3, characterized in that: The adjustable partition is an elastic membrane (12), and the edge of the elastic membrane (12) is connected to the inner wall of the pressure accumulator tank (7).

5. The pipeline structure with backwashing function according to claim 3, characterized in that: The adjustable partition is a piston (13). A sliding rod (14) is provided in the pressure accumulator (7) from the first chamber (10) to the second chamber (11). One end of the sliding rod (14) is connected to the cavity wall of the second chamber (11) away from the first chamber (10). A sliding hole (15) matching the sliding rod (14) is provided in the middle of the piston (13). The piston (13) is slidably sleeved on the sliding rod (14) through the sliding hole (15), and the edge of the piston (13) is slidably fitted to the inner wall of the pressure accumulator (7). A spring (16) is sleeved on the sliding rod (14). One end of the spring (16) is connected to the cavity wall of the second chamber (11), and the other end is connected to the piston (13).

6. A pipeline structure with backwashing function according to claim 5, characterized in that: The air pipe (9) is provided with a fourth valve (17) for controlling the on / off of the air pipe (9); and a sealing layer (18) is provided around the edge of the piston (13).

7. The pipeline structure with backwashing function according to claim 5, characterized in that: One end of the sliding rod (14) placed in the first chamber (10) is provided with a support rod (19) connected to the cavity wall of the first chamber (10).

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