A self-cleaning system for a filter

Abstract

This utility model relates to a self-cleaning system for a filter. A first three-way pneumatic valve is connected to the sample inlet via a pipe; an interface away from the sample inlet is connected to a second three-way ball valve via a pipe; and another interface is connected to the exhaust gas outlet via a pipe. The second three-way ball valve's interface away from the first three-way pneumatic valve is connected to the sample outlet via a pipe; another interface is connected to the first three-way ball valve via a pipe. The other interface of the first three-way ball valve is connected to the exhaust gas outlet via a pipe, and the interface away from the exhaust gas outlet is connected to a nitrogen purging end via a pipe. The second three-way pneumatic valve is connected to the pipe between the first three-way ball valve and the nitrogen purging end via a pipe, and the interface away from the nitrogen purging end is connected to a pneumatic actuator via a pipe. The output of the pneumatic actuator controls the first and second three-way ball valves. This utility model features intelligent control, requiring no manual intervention and reducing the risk of operational errors.

Description

Technical Field

[0001] This utility model relates to the field of automation and control technology, and in particular to a self-cleaning system for filters. Background Technology

[0002] In pretreatment systems, to ensure the accuracy and reliability of subsequent test results, residual samples must be completely emptied from the system after each test. This is especially crucial during maintenance operations such as replacing filter cartridges; it is essential to ensure that no sample residue remains in the piping system to eliminate potential safety risks and protect the personal safety of operators. Therefore, a system that can completely remove sample residue from the piping is urgently needed. Utility Model Content

[0003] To address the issue of sample residue within the pipeline system in pretreatment systems, a self-cleaning system for filters is proposed.

[0004] The technical solution of this utility model is as follows: a self-cleaning system for a filter, comprising a first three-way pneumatic valve, which is connected to a sample inlet end via a pipe; an interface of the first three-way pneumatic valve away from the sample inlet end is connected to a second three-way ball valve via a pipe; another interface of the first three-way pneumatic valve is connected to an exhaust gas outlet end via a pipe; an interface of the second three-way ball valve away from the first three-way pneumatic valve is connected to a sample outlet end via a pipe; another interface of the second three-way ball valve is connected to the first three-way ball valve via a pipe; another interface of the first three-way ball valve is connected to the exhaust gas outlet end via a pipe; an interface of the first three-way ball valve away from the exhaust gas outlet end is connected to a nitrogen purging end via a pipe; the second three-way pneumatic valve is connected to the pipe between the first three-way ball valve and the nitrogen purging end via a pipe; an interface of the second three-way pneumatic valve away from the nitrogen purging end is connected to a pneumatic actuator via a pipe; the output end of the pneumatic actuator controls the first three-way ball valve and the second three-way ball valve.

[0005] Preferably, the first three-way pneumatic valve and the second three-way pneumatic valve are equipped with gas detection devices.

[0006] Preferably, a sample filter is provided on the pipeline between the first three-way pneumatic valve and the second three-way ball valve.

[0007] Preferably, a pressure reducing valve is provided on the straight pipe section connecting the second three-way pneumatic valve and the nitrogen purging end to the first three-way ball valve.

[0008] Preferably, a second one-way valve is provided on the straight pipe section near the nitrogen purging end.

[0009] Preferably, a first check valve is provided on the pipeline between the first three-way pneumatic valve and the exhaust gas discharge end.

[0010] Preferably, a ball valve is provided on the pipe between the first one-way valve and the exhaust gas discharge end.

[0011] The advantages of this utility model are as follows: intelligent control eliminates the need for manual intervention, reducing the risk of operational errors; multiple safety safeguards are provided, including a pressure reducing valve to ensure stable and controllable system pressure, and a check valve to prevent sample backflow and contamination; excellent cleaning efficiency, capable of cleaning filters and connecting pipelines simultaneously, leaving no cleaning dead spots; standardized interfaces allow for seamless connection to various analytical instruments; and simple operation and maintenance are achieved through an automatic control program combined with modular design, making system operation easy. Attached Figure Description

[0012] Figure 1 This is a flow path diagram of the self-cleaning system of the filter of this utility model with the pneumatic valve not turned on.

[0013] Figure 2 The flow path diagram for opening the first pneumatic valve and closing the second pneumatic valve in the self-cleaning system of the filter of this utility model;

[0014] Figure 3 The flow path diagram for the self-cleaning system of the filter of this utility model, which simultaneously opens the first pneumatic valve and the second pneumatic valve;

[0015] Figure 4 The flow path diagram for the self-cleaning system of the filter of this utility model is shown in the figure, which shows the first pneumatic valve being closed and the second pneumatic valve being opened.

[0016] The component names corresponding to the various reference numerals in the diagram are as follows:

[0017] 1. First three-way pneumatic valve; 2. Second three-way pneumatic valve; 3. First three-way ball valve; 4. Second three-way ball valve; 5. First check valve; 6. Second check valve; 7. Pressure reducing valve; 8. Ball valve; 9. Sample filter; 10. Pneumatic actuator.

[0018] N2, nitrogen purging end; ATM, exhaust gas emission end; SAMPLE IN, sample inlet end; SAMPLE OUT, sample outlet end. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0020] refer to Figure 1As shown in the figure, this application discloses a self-cleaning system for a filter, including a first three-way pneumatic valve 1. One port of the first three-way pneumatic valve 1 is connected to the sample inlet end via a pipe. The port of the first three-way pneumatic valve 1 away from the sample inlet end is connected to one port of a second three-way ball valve 4 via a pipe. The other port of the first three-way pneumatic valve 1 is connected to the exhaust gas outlet end via a pipe. A sample filter 9 is provided on the pipe between the first three-way pneumatic valve 1 and the second three-way ball valve 4. During normal operation, when not being purged for cleaning, the sample filter 9 filters impurities in the sample.

[0021] The interface of the second three-way ball valve 4, which is away from the interface of the first three-way pneumatic valve 1, is connected to the sample outlet end through a pipe. The other interface of the second three-way ball valve 4 is connected to one interface of the first three-way ball valve 3 through a pipe.

[0022] One port of the first three-way ball valve 3 is connected to the exhaust gas discharge end through a pipeline, and the port of the first three-way ball valve 3 away from the exhaust gas discharge end is connected to the nitrogen purging end through a pipeline.

[0023] The second three-way pneumatic valve 2 is connected to the pipeline between the first three-way ball valve 3 and the nitrogen purging end through a pipeline. The interface of the second three-way pneumatic valve 2 away from the nitrogen purging end is connected to the pneumatic actuator 10 through a pipeline. The other interface of the second three-way pneumatic valve 2 is for discharge and is not connected to a pipeline.

[0024] The output of the pneumatic actuator 10 controls the first three-way ball valve 3 and the second three-way ball valve 4.

[0025] The first three-way pneumatic valve 1 and the second three-way pneumatic valve 2 are equipped with gas detection devices. After receiving the pneumatic signal from the instrument, the ball valve switches internally.

[0026] A pressure reducing valve 7 is installed on the straight section of the pipeline connecting the second three-way pneumatic valve 2 and the nitrogen purging end to the first three-way ball valve 3; the pressure reducing valve 7 adjusts the pressure from the nitrogen main pipe at the nitrogen purging end.

[0027] A second one-way valve 6 is installed on the straight pipe section near the nitrogen purging end.

[0028] A first check valve 5 is provided on the pipeline between the first three-way pneumatic valve 1 and the exhaust gas discharge end;

[0029] A ball valve 8 is installed on the pipeline between the first one-way valve 5 and the exhaust gas discharge end.

[0030] The specific working method is as follows:

[0031] refer to Figure 1 As shown, the sample enters from the sample inlet end and exits from the sample outlet end along the pipeline; the entire self-cleaning system is not activated.

[0032] refer to Figure 2As shown, the sample remains in the pipeline at this time. After the instrument detects the first three-way pneumatic valve 1, it is activated. At this time, the interface with the sample inlet is closed, and the other two interfaces are connected. The sample that has not passed through the first three-way pneumatic valve 1 stops running. The other two interfaces of the first three-way pneumatic valve 1 are opened. The sample that has passed through the first three-way pneumatic valve 1 is discharged to the exhaust gas outlet through the first one-way valve 5.

[0033] refer to Figure 3 As shown, at this time, the instrument of the second three-way pneumatic valve 2 detects sample residue in the pipeline. After the instrument of the second three-way pneumatic valve 2 detects this, it starts, closes the discharge port, and connects the other two interfaces. At this time, the nitrogen purging end starts purging and opens the pressure reducing valve 7. At the same time, nitrogen can pass through the second three-way pneumatic valve 2. After passing through, the nitrogen enters the pneumatic actuator. The pneumatic actuator sends signals to the first three-way ball valve 3 and the second three-way ball valve 4 respectively, closing the interface between the first three-way ball valve 3 and the exhaust gas discharge end and connecting the other two interfaces; closing the interface between the second three-way ball valve 4 and the sample outlet end and connecting the other two interfaces. The purging gas will pass through the sample filter 9, and finally all waste is discharged to the exhaust gas discharge end through the first one-way valve 5.

[0034] refer to Figure 4 As shown, at this time, the instrument of the second three-way pneumatic valve 2 detects the sample residue in the pipeline and closes it. At this time, the nitrogen purging end closes the purging, and simultaneously closes the interface between the first three-way ball valve 3 and the nitrogen purging end, connecting the other two interfaces; closes the interface between the second three-way ball valve 4 and the first three-way ball valve 3, connecting the other two interfaces. The gas in the pipeline is discharged to the exhaust gas discharge end through the first three-way ball valve 3, and on the other side, it is discharged to the exhaust gas discharge end through the first one-way valve 5. Then return to Figure 1 Sample running.

[0035] The beneficial effects are:

[0036] This utility model features intelligent control, eliminating the need for manual intervention and reducing the risk of operational errors; multiple safety safeguards, including a pressure reducing valve to ensure stable and controllable system pressure, and a check valve to prevent sample backflow and contamination; excellent cleaning efficiency, capable of cleaning filters and connecting pipelines simultaneously, leaving no blind spots; standardized interfaces for seamless integration with various analytical instruments; and simple operation and maintenance, with an automatic control program and modular design that makes the system easy to operate.

[0037] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A self-cleaning system for a filter, characterized by Includes a first three-way pneumatic valve (1), which is connected to the sample inlet end via a pipe. The port of the first three-way pneumatic valve (1) away from the sample inlet end is connected to a second three-way ball valve (4) via a pipe. The other port of the first three-way pneumatic valve (1) is connected to the exhaust gas outlet end via a pipe. The port of the second three-way ball valve (4) away from the first three-way pneumatic valve (1) is connected to the sample outlet end via a pipe. The other port of the second three-way ball valve (4) is connected to the first three-way ball valve (3) via a pipe. Another port of the three-way ball valve (3) is connected to the exhaust gas discharge end through a pipe. The port of the first three-way ball valve (3) away from the exhaust gas discharge end is connected to the nitrogen purging end through a pipe. The second three-way pneumatic valve (2) is connected to the pipe between the first three-way ball valve (3) and the nitrogen purging end through a pipe. The port of the second three-way pneumatic valve (2) away from the nitrogen purging end is connected to the pneumatic actuator (10) through a pipe. The output end of the pneumatic actuator (10) controls the first three-way ball valve (3) and the second three-way ball valve (4).

2. The self-cleaning system of the filter according to claim 1, characterized in that, Gas detection devices are provided on the first three-way pneumatic valve (1) and the second three-way pneumatic valve (2).

3. The self-cleaning system of the filter according to claim 1, characterized in that, A sample filter (9) is provided on the pipeline between the first three-way pneumatic valve (1) and the second three-way ball valve (4).

4. The self-cleaning system of the filter according to claim 1, characterized in that, A pressure reducing valve (7) is provided on the straight pipe section connecting the second three-way pneumatic valve (2) and the nitrogen purging end to the first three-way ball valve (3).

5. The self-cleaning system of the filter according to claim 1, characterized in that, A second check valve (6) is provided on the straight pipe section near the nitrogen purging end.

6. The self-cleaning system of the filter according to claim 1, characterized in that, A first check valve (5) is provided on the pipeline between the first three-way pneumatic valve (1) and the exhaust gas discharge end.

7. The self-cleaning system of the filter according to claim 6, characterized in that, A ball valve (8) is provided on the pipeline between the first one-way valve (5) and the exhaust gas discharge end.

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