Low water vapor interference type gas sample inlet pipe

Abstract

The utility model provides a low water vapor interference type gas sample inlet pipe, which relates to the technical field of gas detection devices, and comprises a needle valve, a gas delivery pipe, a joint, a heating jacket and a heating belt, the gas outlet end of the needle valve is connected with the gas inlet of the gas delivery pipe, the gas outlet of the gas delivery pipe is connected with the joint, and the heating jacket is arranged on the outer side of the needle valve and is connected with a temperature controller. And the heating belt is mounted on the outer side of the gas conveying pipe and is connected with the heating sleeve. The problem that a traditional gas inlet pipe of an infrared gas analyzer is easy to bring water in air to influence a detection result can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection devices, and particularly relates to a gas sample inlet pipe with low water vapor interference. Background Technique

[0002] An infrared gas analyzer uses the characteristic that different gases selectively absorb infrared radiation energy of different wavelengths to analyze gas concentration, and has the characteristics of wide range, high sensitivity, rapid response, and strong selectivity.

[0003] During the use of an infrared gas analyzer, sampling is carried out through a sample inlet pipe. One end of the sample inlet pipe for sampling is connected to the sampling port of the infrared gas analyzer, and the other end is connected to a gas storage tank to be measured through a needle valve to control sampling. The above traditional sampling method has the following problems in use: Some types of gases to be measured are extremely soluble in water. When connecting the gas sampling, moisture in the air and moisture in the air adhering to the metal surface of the needle valve are easily brought in by the gas, thus affecting the detection result. Therefore, this application proposes a gas sample inlet pipe with low water vapor interference. Content of the Utility Model

[0004] In order to overcome the problems in the background technique, the utility model provides a gas sample inlet pipe with low water vapor interference, which solves the problem that the traditional inlet pipe of an infrared gas analyzer is easy to bring in moisture in the air and affect the detection result.

[0005] A gas sample inlet pipe with low water vapor interference includes a needle valve, a gas transmission pipe, a connector, a heating sleeve and a heating tape. The air outlet end of the needle valve is connected to the air inlet of the gas transmission pipe, the air outlet of the gas transmission pipe is connected to the connector, the heating sleeve is installed outside the needle valve and connected to a temperature controller, and the heating tape is installed outside the gas transmission pipe and connected to the heating sleeve.

[0006] Further, the needle valve is a three-way needle valve, including an air inlet end, an exhaust end and an adjustment end.

[0007] Further, the heating sleeve is a flexible electric heating sleeve, and the shape of the heating sleeve matches that of the needle valve. The heating sleeve is sleeved outside the needle valve to cover the air inlet end and the exhaust end.

[0008] Further, the heating tape is a flexible electric heating tape, and the heating tape is spirally wound and coated outside the gas transmission pipe.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] This application is provided with a heating jacket and a heating tape to heat the needle valve and the gas pipeline, reducing the moisture content in the air around the equipment to avoid interference. The needle valve is a three-way needle valve, which can first connect to a nitrogen source through the intake end for purging and then discharge through the exhaust end, and then connect to the gas source to be measured, minimizing the interference of water vapor during the intake process and ensuring the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] To clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments are described.

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the needle valve structure of the present invention;

[0014] Figure 3 It is a schematic diagram of the heating jacket structure of the present invention.

[0015] 1 - Needle valve, 11 - Intake end, 12 - Exhaust end, 13 - Adjusting end, 2 - Gas pipeline, 3 - Connector, 4 - Heating jacket, 5 - Heating tape. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the objectives, technical solutions, and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the drawings for the convenience of those skilled in the art to understand.

[0017] The present invention provides a gas sample intake pipe with low water vapor interference. Refer to Figures 1-3 , a gas sample intake pipe with low water vapor interference, including a needle valve 1, a gas pipeline 2, a connector 3, a heating jacket 4, and a heating tape 5. The outlet end of the needle valve 1 is connected to the inlet of the gas pipeline 2, the outlet of the gas pipeline 2 is connected to the connector 3, the heating jacket 4 is installed outside the needle valve 1 and connected to a temperature controller, and the heating tape 5 is installed outside the gas pipeline 2 and connected to the heating jacket 4.

[0018] The needle valve 1 can connect to the gas source to be measured and control the gas flow. The connector 3 can be connected to the sample inlet end of the detection device. The gas pipeline 2 can introduce the gas to be measured input by the needle valve 1 into the sample inlet end of the detection device. The heating jacket 4 and the heating tape 5 can heat up the needle valve 1 and the gas pipeline 2 to reduce the interference of moisture in the environment and on the metal surface.

[0019] Refer to Figures 1-3 , the needle valve 1 is a three-way needle valve 1, including an intake end 11, an exhaust end 12, and an adjusting end 13. The intake end 11 can connect to the gas source, the exhaust end 12 can discharge the purging gas, thus avoiding residual interference, and the adjusting end 13 can control the on-off of the intake end 11, the exhaust end 12, and the outlet end of the valve seat.

[0020] Refer to Figures 1-3 , the heating sleeve 4 is a flexible electric heating sleeve, and the shape of the heating sleeve 4 matches that of the needle valve 1. The heating sleeve 4 is sleeved outside the needle valve 1 to cover the air inlet end 11 and the exhaust end 12, and heats the surface of the needle valve 1 to reduce moisture interference.

[0021] Refer to Figures 1-3 , the heating tape 5 is a flexible electric heating tape, and the heating tape 5 is spirally wound and coated outside the gas pipeline 2 to heat the inside and outside of the gas pipeline 2.

[0022] Working process:

[0023] Connect the joint 3 of the gas pipeline 2 to the infrared gas analyzer, sleeve the heating sleeve 4 and the heating tape 5 outside the needle valve 1 and the gas pipeline 2, then connect the air inlet end 11 to the nitrogen source for purging and discharge through the exhaust end 12, and then connect the air inlet end 11 to the gas source to be measured and introduce the gas to be measured for detection.

[0024] The above-mentioned is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A low water vapor interference type gas sample inlet pipe, characterized in that: The invention comprises a needle valve (1), an air supply pipe (2), a joint (3), a heating sleeve (4) and a heating belt (5), wherein the air outlet end of the needle valve (1) is connected to the air inlet of the air supply pipe (2), the air outlet of the air supply pipe (2) is connected to the joint (3), the heating sleeve (4) is installed on the outside of the needle valve (1) and connected to a temperature controller, and the heating belt (5) is installed on the outside of the air supply pipe (2) and connected to the heating sleeve (4).

2. The low water vapor interference type gas sample inlet tube according to claim 1, characterized in that: The needle valve (1) is a three-way needle valve (1), comprising an air inlet end (11), an air outlet end (12) and a regulating end (13).

3. The low water vapor interference type gas sample inlet tube according to claim 2, characterized in that: The heating sleeve (4) is a flexible electric heating sleeve. The shape of the heating sleeve (4) matches the needle valve (1). The heating sleeve (4) is sleeved on the outside of the needle valve (1) to cover the air inlet end (11) and the air outlet end (12).

4. The low water vapor interference type gas sample inlet tube according to claim 2, characterized in that: The heating belt (5) is a flexible electric belt, and the heating belt (5) is spirally wound and coated on the outside of the gas transmission pipe (2).

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