Gas detection tube pre-treatment purging device

Abstract

This utility model discloses a gas detection pipeline pretreatment purging device, belonging to the field of sample gas detection. The device includes a nitrogen input mechanism with a flow meter installed on it. A pneumatic valve is connected to the flow meter via a pipe, and a connecting pipe is connected to the pneumatic valve. A solenoid valve is connected to the end of the connecting pipe, and an instrument air input mechanism is connected to the solenoid valve. This utility model solves the problems of traditional pretreatment methods, such as significant safety hazards, high maintenance requirements, and easy contamination of instrument pipelines leading to inaccurate measurements. This utility model uses a solenoid valve to control a pneumatic two-way valve for automated purging of the pretreatment system, significantly improving operational safety and efficiency. Remote control enables automatic valve switching, completely avoiding the leakage risks associated with manual operation and effectively ensuring personnel safety.

Description

Technical Field

[0001] This utility model relates to the field of sample gas detection, specifically a gas detection pipeline pretreatment purging device. Background Technology

[0002] The sample gas of tetrafluoroethylene usually contains polymers, moisture and other organic impurities. These impurities will gradually accumulate inside the pipes and instruments during long-term operation, resulting in reduced sensor sensitivity, distorted measurement data and even equipment blockage. In order to ensure the accuracy of instrument measurement data, the staff needs to regularly purge and maintain the system with high-purity nitrogen. During operation, first close the sample gas valve, then introduce nitrogen for backflushing to remove residual contaminants. After purging, the instrument needs to be recalibrated and the maintenance frequency should be flexibly adjusted according to the impurity content of the sample gas and environmental conditions. Traditional purging operations have many problems, with safety hazards being particularly prominent. Due to the flammable and explosive nature of tetrafluoroethylene, frequent opening of valves for nitrogen purging may cause leakage risks, threatening the safety of operators. In addition, the pretreatment and maintenance workload is large. Each purging requires shutting off the sample gas, switching nitrogen, and calibrating instruments, which is a cumbersome and time-consuming process. After long-term operation, polymers, moisture, and oil can easily accumulate in the instrument pipelines, leading to slow sensor response, drifting measurement data, and even blockage of sampling pipelines, affecting the stability of process control. These problems not only increase maintenance costs but also reduce production efficiency.

[0003] In summary, to improve the stability and safety of tetrafluoroethylene sample gas analysis, it is necessary to address the problems of significant safety hazards, cumbersome pretreatment and maintenance, and easy contamination of instrument pipelines in traditional purging operations, so as to make the measurement data more accurate and reliable, while reducing the risks of manual operation and maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a gas detection pipeline pretreatment purging device, which uses a solenoid valve to control a pneumatic two-way valve to purge the pretreatment system, thereby greatly protecting personal safety and preventing personal injury accidents, improving operational efficiency, and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas detection pipeline pretreatment purging device, including a nitrogen input mechanism, a flow meter installed on the nitrogen input mechanism, a pneumatic valve connected to the flow meter via a pipe, a connecting pipe connected to the pneumatic valve, a solenoid valve connected to the end of the connecting pipe, an instrument air input mechanism connected to the solenoid valve, the instrument air input mechanism being used to open the pneumatic valve, a conduit installed on the pneumatic valve, a sample input component connected to the conduit, and the sample input component being used to input sample gas.

[0006] Preferably, the nitrogen input mechanism includes a first opening and closing component connected to an external nitrogen pipeline and a pressure reducing component disposed on the first opening and closing component. The first opening and closing component opens and closes the nitrogen pipeline, and the first pressure reducing component is used to reduce the nitrogen pressure.

[0007] Preferably, the first opening and closing assembly includes a nitrogen inlet pipe connected to an external nitrogen pipeline and a first ball valve fixed to the nitrogen inlet pipe, the first ball valve being used to open and close the nitrogen inlet pipe.

[0008] Preferably, the pressure reducing assembly includes a nitrogen pressure reducing valve connected to the first ball valve and a gas supply pipe fixed to the nitrogen pressure reducing valve, the gas supply pipe being fixedly connected to the flow meter.

[0009] Preferably, the instrument air input mechanism includes a second pressure reducing component disposed on the solenoid valve and a second opening and closing component disposed on the second pressure reducing component. The second opening and closing component is used to open and close the instrument air duct, and the second pressure reducing component is used to reduce the instrument air pressure.

[0010] Preferably, the second opening and closing assembly includes an instrument air intake pipe connected to an external instrument air duct and a second ball valve connected to the instrument air intake pipe, the second ball valve being used to open and close the instrument air intake pipe.

[0011] Preferably, the second pressure reducing assembly includes an instrument air pressure reducing valve connected to the second ball valve, and the instrument air pressure reducing valve is connected to the solenoid valve via a pipeline.

[0012] Preferably, the sample input component includes a connector connected to the end of the conduit, a delivery tube connected to the connector, a third ball valve connected to the delivery tube, and a sample inlet tube fixed to the third ball valve, wherein the sample inlet tube is connected to an external sample gas pipeline.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention employs a solenoid valve to control a pneumatic two-way valve for automated purging of the pretreatment system, significantly improving operational safety and efficiency. Remote control enables automatic valve switching, completely eliminating the leakage risks associated with manual operation and effectively ensuring personnel safety. The automated purging process is fast and precise, eliminating human error and drastically reducing maintenance time, making purging operations more efficient and reliable. Furthermore, the timed automatic purging function keeps pipelines clean for extended periods, reducing impurity buildup and ensuring stable and accurate measurement data. This reduces safety risks, improves maintenance quality, and provides strong support for continuous production. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the nitrogen pressure reducing valve of this utility model. Figure 3 This is a three-dimensional structural diagram of the flow meter of this utility model; Figure 4 This is a three-dimensional structural diagram of the solenoid valve of this utility model; Figure 5 This is a three-dimensional structural diagram of the connecting head of this utility model.

[0015] In the diagram: 101, nitrogen inlet pipe; 102, first ball valve; 103, nitrogen pressure reducing valve; 104, gas delivery pipe; 2, flow meter; 3, pneumatic valve; 4, connecting pipe; 5, solenoid valve; 61, instrument air pressure reducing valve; 62, second ball valve; 63, instrument air inlet pipe; 7, conduit; 81, connector; 82, delivery pipe; 83, third ball valve; 84, sample inlet pipe. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments.

[0017] Refer to the instruction manual appendix Figures 1 to 5 A gas detection pipeline pretreatment purging device includes a nitrogen input mechanism, a flow meter 2 installed on the nitrogen input mechanism, a pneumatic valve 3 connected to the flow meter 2 via a pipe, a connecting pipe 4 connected to the pneumatic valve 3, a solenoid valve 5 connected to the end of the connecting pipe 4, an instrument air input mechanism connected to the solenoid valve 5, the instrument air input mechanism being used to open the pneumatic valve 3, a conduit 7 installed on the pneumatic valve 3, a sample input component connected to the conduit 7, and the sample input component being used to input sample gas.

[0018] It should be noted that the instrument air is input through the instrument air input mechanism controlled by the solenoid valve 5, which in turn drives the pneumatic valve 3 to operate. During purging, nitrogen is input through the nitrogen input mechanism, and the flow rate is regulated by the flow meter 2. Finally, the nitrogen flows through the entire pretreatment system pipeline through the opened pneumatic valve 3, effectively removing impurities in the pipeline and ensuring the accuracy of subsequent sample gas measurements.

[0019] Refer to the instruction manual appendix Figures 1 to 3 The nitrogen input mechanism includes a first opening and closing component connected to an external nitrogen pipeline and a pressure reducing component disposed on the first opening and closing component. The first opening and closing component opens and closes the nitrogen pipeline, and the first pressure reducing component is used to reduce the nitrogen pressure.

[0020] It should be noted that the nitrogen input mechanism is responsible for introducing nitrogen for purging, the first opening and closing component provides the function of connecting and cutting off the nitrogen source, and the pressure reducing component ensures that the nitrogen pressure entering the subsequent flow meter 2 is stable within the safe operating range, laying the foundation for precise control of the purging flow rate.

[0021] Refer to the instruction manual appendix Figures 1 to 3The first opening and closing assembly includes a nitrogen inlet pipe 101 connected to an external nitrogen pipeline and a first ball valve 102 fixed on the nitrogen inlet pipe 101. The first ball valve 102 is used to open and close the nitrogen inlet pipe 101.

[0022] It should be noted that the first opening and closing component achieves reliable control of the nitrogen gas supply through manual operation of the first ball valve 102, which facilitates the isolation and maintenance of the device or emergency shut-off, and is an important part of the safe operation of the system.

[0023] Refer to the instruction manual appendix Figures 1 to 3 The pressure reducing assembly includes a nitrogen pressure reducing valve 103 connected to the first ball valve 102 and a gas supply pipe 104 fixed to the nitrogen pressure reducing valve 103. The gas supply pipe 104 is fixedly connected to the flow meter 2.

[0024] It should be noted that the nitrogen pressure reducing valve 103 in the pressure reducing assembly reduces the high-pressure nitrogen from the first opening and closing assembly to the required low pressure, and then stably delivers it to the flow meter 2 through the gas delivery pipe 104, ensuring the accuracy and stability of flow regulation.

[0025] Refer to the instruction manual appendix Figures 1 to 4 The instrument air input mechanism includes a second pressure reducing component mounted on the solenoid valve 5 and a second opening and closing component mounted on the second pressure reducing component. The second opening and closing component is used to open and close the instrument air duct, and the second pressure reducing component is used to reduce the instrument air pressure.

[0026] It should be noted that the instrument air input mechanism provides the power source for the pneumatic valve 3, the second opening and closing component controls the on and off of the instrument air source, and the second pressure reducing component is responsible for adjusting the instrument air pressure to a safe and stable value suitable for driving the pneumatic valve 3, so as to ensure the reliable operation of the pneumatic valve 3.

[0027] Refer to the instruction manual appendix Figures 1 to 4 The second opening and closing assembly includes an instrument air intake pipe 63 connected to an external instrument air duct and a second ball valve 62 connected to the instrument air intake pipe 63. The second ball valve 62 is used to open and close the instrument air intake pipe 63.

[0028] It should be noted that the second opening and closing component controls the on / off of the instrument air supply required to drive the pneumatic valve 3 by manually operating the second ball valve 62, which also serves the system's safety isolation and maintenance operations.

[0029] Refer to the instruction manual appendix Figures 1 to 4 The second pressure reducing assembly includes an instrument air pressure reducing valve 61 connected to the second ball valve 62, and the instrument air pressure reducing valve 61 is connected to the solenoid valve 5 through a pipeline.

[0030] It should be noted that the instrument air pressure reducing valve 61 in the second pressure reducing assembly regulates the high-pressure instrument air passing through the second opening and closing assembly to the working pressure required by the solenoid valve 5 and the pneumatic valve 3, and stably delivers it to the solenoid valve 5 through the pipeline, ensuring the stability and reliability of the pneumatic control signal.

[0031] Refer to the instruction manual appendix Figure 1 , Figure 3 and Figure 5 The sample input component includes a connector 81 connected to the end of the conduit 7, a delivery tube 82 connected to the connector 81, a third ball valve 83 connected to the delivery tube 82, and a sample inlet tube 84 fixed to the third ball valve 83. The sample inlet tube 84 is connected to an external sample gas pipeline.

[0032] It should be noted that the sample input component constitutes the channel for the sample gas to enter the pretreatment system. When the device is in the sample measurement state, the pneumatic valve 3 is closed, and the sample gas flows into the system through the other outlet of the connector 81.

[0033] Working principle: In purging mode, solenoid valve 5 is energized, opening the instrument air passage from instrument air inlet pipe 63. The instrument air first flows through the second ball valve 62, then through the instrument air pressure reducing valve 61 to reduce and stabilize the pressure, and then drives the pneumatic valve 3 to perform the opening action. At the same time, the purging nitrogen from nitrogen inlet pipe 101, after being controlled by the first ball valve 102, is depressurized by the nitrogen pressure reducing valve 103, then the flow rate is precisely adjusted by the flow meter 2, and finally, through the opened pneumatic valve 3, the nitrogen immediately enters and flows through the entire pre-purging process. The system pipeline is treated to forcefully remove impurities such as polymers and moisture. After purging, the solenoid valve 5 is de-energized and reset, and the pneumatic valve 3 closes under the action of the spring, automatically cutting off the nitrogen passage and isolating the system. When the sample is being measured, the pneumatic valve 3 remains closed to block the nitrogen passage, and the sample gas enters from the sample inlet pipe 84, passes through the third ball valve 83 and the delivery pipe 82, and finally flows into the detection instrument through the other outlet of the connector 81. This effectively isolates personnel from direct contact with hazardous media and ensures pipeline cleanliness and measurement accuracy.

[0034] It should be noted that the control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Therefore, this utility model will not explain the control method and circuit connection in detail. In this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A gas detection pipeline pretreatment purging device, comprising a nitrogen input mechanism, characterized in that, A flow meter (2) is installed on the nitrogen input mechanism. A pneumatic valve (3) is connected to the flow meter (2) via a pipe. A connecting pipe (4) is connected to the pneumatic valve (3). A solenoid valve (5) is connected to the end of the connecting pipe (4). An instrument air input mechanism is connected to the solenoid valve (5). The instrument air input mechanism is used to open the pneumatic valve (3). A conduit (7) is installed on the pneumatic valve (3). A sample input component is connected to the conduit (7). The sample input component is used to input sample gas.

2. The gas detection pipeline pretreatment purging device according to claim 1, characterized in that, The nitrogen input mechanism includes a first opening and closing component connected to an external nitrogen pipeline and a pressure reducing component disposed on the first opening and closing component. The first opening and closing component opens and closes the nitrogen pipeline, and the first pressure reducing component is used to reduce the nitrogen pressure.

3. The gas detection pipeline pretreatment purging device according to claim 2, characterized in that, The first opening and closing assembly includes a nitrogen inlet pipe (101) connected to an external nitrogen pipeline and a first ball valve (102) fixed on the nitrogen inlet pipe (101), the first ball valve (102) being used to open and close the nitrogen inlet pipe (101).

4. The gas detection pipeline pretreatment purging device according to claim 3, characterized in that, The pressure reducing assembly includes a nitrogen pressure reducing valve (103) connected to the first ball valve (102) and a gas supply pipe (104) fixed to the nitrogen pressure reducing valve (103), the gas supply pipe (104) being fixedly connected to the flow meter (2).

5. The gas detection pipeline pretreatment purging device according to claim 1, characterized in that, The instrument air input mechanism includes a second pressure reducing component mounted on the solenoid valve (5) and a second opening and closing component mounted on the second pressure reducing component. The second opening and closing component is used to open and close the instrument air duct, and the second pressure reducing component is used to reduce the instrument air pressure.

6. The gas detection pipeline pretreatment purging device according to claim 5, characterized in that, The second opening and closing assembly includes an instrument air intake pipe (63) connected to an external instrument air duct and a second ball valve (62) connected to the instrument air intake pipe (63), the second ball valve (62) being used to open and close the instrument air intake pipe (63).

7. The gas detection pipeline pretreatment purging device according to claim 6, characterized in that, The second pressure reducing assembly includes an instrument air pressure reducing valve (61) connected to the second ball valve (62), and the instrument air pressure reducing valve (61) is connected to the solenoid valve (5) via a pipe.

8. The gas detection pipeline pretreatment purging device according to claim 1, characterized in that, The sample input assembly includes a connector (81) connected to the end of the conduit (7), a delivery tube (82) connected to the connector (81), a third ball valve (83) connected to the delivery tube (82), and a sample inlet tube (84) fixed to the third ball valve (83). The sample inlet tube (84) is connected to an external sample gas pipeline.

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