Gas detection device

Abstract

The utility model discloses a gas detection device, which comprises a gas delivery pipe, a first electromagnetic valve is inserted on the side wall surface of the gas delivery pipe, the utility model relates to the technical field of gas detection, the first electromagnetic valve is opened, gas enters a temperature measuring box through the first electromagnetic valve, and a temperature sensor is used for measuring the temperature; when the temperature sensor detects that the gas temperature is high, the second electromagnetic valve is opened, the third electromagnetic valve is closed, the electric heating wire works, high-temperature gas enters the cooling box through the second electromagnetic valve, cooling water circulates in the water cooling pipe, the high-temperature gas makes contact with the water cooling pipe to achieve heat exchange, and the gas with the temperature reduced enters the detection box again. Gas is detected by the gas detection sensor, then enters the heating box through the communicating pipe, is heated by the electric heating wire and is conveyed into the gas conveying pipe through the return pipe, so that the difference value between the original temperature of the gas in the gas conveying pipe and the temperature of the gas subjected to heat exchange is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to a gas detection device. Background Art

[0002] In the following cases, it is usually necessary to detect the gas flowing in the pipeline:

[0003] 1. Industrial safety: In many industrial sites, employees may be exposed to various chemicals and harmful gases, such as organic solvents, ammonia, hydrogen sulfide, etc. These gases may cause symptoms such as headaches, nausea, and breathing difficulties, and in severe cases may even lead to death. Therefore, real-time monitoring of the gases circulating in industrial pipelines can help employees avoid being harmed by these harmful gases and ensure their health and safety.

[0004] 2. Ensure production safety and quality: Many chemicals in industrial pipelines may affect the quality and safety of the production process. For example, organic solvents may cause product quality problems, while harmful gases such as ammonia may cause corrosion and damage to production equipment. Through gas detection technology, the concentration of these harmful gases can be detected and controlled in time to ensure the safety and quality of the production process.

[0005] When detecting high-temperature gas in a gas circulation pipeline, it is usually necessary to cool the high-temperature gas before detecting it to prevent damage to the gas detection device. A gas collection and detection device with a publication number of CN209117439U includes a filter sampling probe, a backflush control box, a gas detection box and a return air joint connected in sequence, which ensures that the gas entering the backflush control box is free of impurities. At the same time, when one of the sampling probes performs normal gas collection and sampling work, the other sampling probe can simultaneously backflush itself to clean dust impurities, and then pass the detection inside the gas detection box and transport it to the return air interface, so that the gas entering the detection device can still return to the original area. For the high-temperature area, the backflush box is also compatible with the installation of a condenser design, so that the gas leading to the gas collection and detection device is condensed; however, in the patent document, the condensed low-temperature gas is transported to the original place in a low-temperature state, which will cause a large temperature difference in the pipeline for transporting the gas. Due to the temperature difference of the gas in the pipeline, thermal stress will be generated inside the transport pipeline. This thermal stress may cause deformation, cracking or fatigue failure of the pipeline material, especially at the connection, bend or fixed point of the pipeline, and the safety factor is low.

[0006] There may already be technical means to solve the above problems in the prior art, but this case intends to provide an alternative or replacement technical solution. Utility Model Content

[0007] In order to solve the problems raised in the background technology, the utility model is implemented through the following technical solutions: a gas detection device, including a gas delivery pipe, a first solenoid valve is inserted into the side wall of the gas delivery pipe, and a detection structure is installed at one end of the first solenoid valve;

[0008] The detection structure includes a temperature measuring box, which is installed at one end of the first solenoid valve, a temperature sensor is installed on the inner wall of the temperature measuring box, a second solenoid valve is inserted on the side wall of the temperature measuring box, a cooling box is installed at one end of the second solenoid valve, a water-cooling pipe is wrapped around the inner wall of the cooling box, a flow pipe is installed on the cooling box, a detection box is installed at one end of the flow pipe, a third solenoid valve is installed between the detection box and the temperature measuring box, a gas detection sensor is installed on the inner wall of the detection box, a connecting pipe is inserted on the detection box, a heating box is installed at one end of the connecting pipe, a heating wire is installed on the inner wall of the heating box, and a reflux pipe is installed between the heating box and the gas delivery pipe.

[0009] Preferably, a filter layer is installed on the inner wall of the temperature measuring box.

[0010] Preferably, the first solenoid valve and the return pipe are covered with protective covers.

[0011] Preferably, a first check valve is installed in the middle portion of the flow pipe.

[0012] Preferably, a second check valve is installed in the middle portion of the reflux pipe.

[0013] Preferably, the first solenoid valve, the second solenoid valve and the third solenoid valve are all one-way valves.

[0014] Beneficial Effects

[0015] The utility model provides a gas detection device, which has the following beneficial effects compared with the prior art: the first solenoid valve is opened, the gas enters the temperature measuring box through the first solenoid valve, and the temperature sensor measures the temperature. When the temperature sensor detects that the gas temperature is high, the second solenoid valve is opened, the third solenoid valve is closed, and the heating wire works. The high-temperature gas enters the cooling box through the second solenoid valve, and cooling water flows in the water-cooling pipe. The high-temperature gas contacts the water-cooling pipe to achieve heat exchange, and the gas with reduced temperature enters the detection box again. The gas detection sensor detects the gas, and then enters the heating box through the connecting pipe, and the heating wire heats it. The gas is transported to the gas delivery pipe through the reflux pipe, thereby reducing the difference between the original temperature of the gas in the gas delivery pipe and the temperature of the gas after heat exchange, reducing thermal stress, avoiding deformation, cracking or fatigue failure of pipeline materials, and improving the safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the main cross-sectional structure of a gas detection device of the utility model.

[0017] Figure 2 The utility model is a three-dimensional structural schematic diagram of a gas detection device.

[0018] Figure 3 It is a partial side cross-sectional structural schematic diagram of a gas detection device of the utility model.

[0019] In the figure: 1. gas delivery pipe, 2. first solenoid valve, 3. temperature measuring box, 4. temperature sensor, 5. second solenoid valve, 6. cooling box, 7. water cooling pipe, 8. circulation pipe, 9. detection box, 10. third solenoid valve, 11. gas detection sensor, 12. connecting pipe, 13. heating box, 14. heating wire, 15. reflux pipe, 16. filter layer, 17. protective cover, 18. first check valve, 19. second check valve. DETAILED DESCRIPTION

[0020] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0021] Embodiment: Through the personnel in this field, all the electrical components in this case are connected to their adapted power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the working order. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0022] See also Figure 1-3 In order to avoid deformation, cracking or fatigue failure of pipeline materials when the condensed gas is transported to the original gas transmission pipe 1 after detection, this technical solution is designed. The detailed technical solution is as follows;

[0023] A gas detection device comprises a gas delivery pipe 1, a first solenoid valve 2 is inserted into the side wall of the gas delivery pipe 1, and a detection structure is installed at one end of the first solenoid valve 2;

[0024] Specifically, the detection structure may include a temperature measuring box 3, which is installed at one end of the first solenoid valve 2, a temperature sensor 4 is installed on the inner wall of the temperature measuring box 3, a second solenoid valve 5 is inserted on the side wall of the temperature measuring box 3, a cooling box 6 is installed on one end of the second solenoid valve 5, a water cooling pipe 7 is wound around the inner wall of the cooling box 6, a flow pipe 8 is installed on the cooling box 6, a detection box 9 is installed on one end of the flow pipe 8, a third solenoid valve 10 is installed between the detection box 9 and the temperature measuring box 3, a gas detection sensor 11 is installed on the inner wall of the detection box 9, a connecting pipe 12 is inserted on the detection box 9, a heating box 13 is installed on one end of the connecting pipe 12, an electric heating wire 14 is installed on the inner wall of the heating box 13, and a reflux pipe 15 is installed between the heating box 13 and the gas delivery pipe 1;

[0025] When gas detection is performed, the first solenoid valve 2 is opened, and part of the gas in the gas delivery pipe 1 enters the temperature measuring box 3 through the first solenoid valve 2, and the temperature sensor 4 measures the temperature. When the temperature sensor 4 detects that the gas temperature is high, the second solenoid valve 5 is opened, the third solenoid valve 10 is closed, and the heating wire 14 works. The high-temperature gas enters the cooling box 6 through the second solenoid valve 5, and cooling water flows in the water-cooling pipe 7. The high-temperature gas contacts the water-cooling pipe 7 to achieve heat exchange, and the gas with reduced temperature enters the detection box 9 again. The gas detection sensor 11 detects the gas, and then enters the heating box 13 through the connecting pipe 12, and the heating wire 14 heats it. It is sent to the gas delivery pipe 1, reducing the difference between the original temperature of the gas in the gas delivery pipe 1 and the temperature of the gas after heat exchange, reducing thermal stress, avoiding deformation, cracking or fatigue failure of the pipeline material, and improving the safety factor. When the temperature sensor 4 detects that the gas temperature is low, the second solenoid valve 5 is closed and the third solenoid valve 10 is opened. The high-temperature gas passes through the third solenoid valve 10 and directly enters the detection box 9. The gas detection sensor 11 detects the gas, and then enters the heating box 13 through the connecting pipe 12. The electric heating wire 14 in the heating box 13 does not work and will not heat the gas. Then, the gas is transported to the gas delivery pipe 1 through the reflux pipe 15 to realize the reflux of the gas.

[0026] As a preferred embodiment, further, a filter layer 16 is installed on the inner wall of the temperature measuring box 3 to filter impurities mixed with the gas in the gas delivery pipe 1;

[0027] As a preferred embodiment, further, a protective cover 17 is mounted on the first solenoid valve 2 and the return pipe 15 to protect the detection structure;

[0028] As a preferred embodiment, further, a first check valve 18 is installed in the middle of the flow pipe 8 to prevent backflow;

[0029] As a preferred embodiment, further, a second check valve 19 is installed in the middle of the return pipe 15 to prevent backflow;

[0030] Preferably, further, the first solenoid valve 2, the second solenoid valve 5 and the third solenoid valve 10 are all one-way valves to prevent backflow.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas detection device, comprising a gas delivery pipe (1), wherein a first solenoid valve (2) is inserted into a side wall of the gas delivery pipe (1), characterized in that: A detection structure is installed at one end of the first solenoid valve (2); The detection structure comprises a temperature measuring box (3), the temperature measuring box (3) is installed at one end of the first solenoid valve (2), a temperature sensor (4) is installed on the inner wall of the temperature measuring box (3), a second solenoid valve (5) is inserted on the side wall of the temperature measuring box (3), a cooling box (6) is installed at one end of the second solenoid valve (5), a water cooling pipe (7) is wound around the inner wall of the cooling box (6), a circulation pipe (8) is installed on the cooling box (6), and a flow pipe (8) is installed at one end of the circulation pipe (8) A detection box (9), a third solenoid valve (10) is installed between the detection box (9) and the temperature measuring box (3), a gas detection sensor (11) is installed on the inner wall of the detection box (9), a connecting pipe (12) is inserted into the detection box (9), a heating box (13) is installed at one end of the connecting pipe (12), a heating wire (14) is installed on the inner wall of the heating box (13), and a return pipe (15) is installed between the heating box (13) and the gas delivery pipe (1).

2. A gas detection device according to claim 1, characterized in that: A filter layer (16) is installed on the inner wall surface of the temperature measuring box (3).

3. A gas detection device according to claim 1, characterized in that: A protective cover (17) is mounted on the first solenoid valve (2) and the return pipe (15).

4. A gas detection device according to claim 1, characterized in that: A first check valve (18) is installed in the middle of the flow pipe (8).

5. A gas detection device according to claim 1, characterized in that: A second check valve (19) is installed in the middle of the return pipe (15).

6. A gas detection device according to claim 1, characterized in that: The first solenoid valve (2), the second solenoid valve (5) and the third solenoid valve (10) are all one-way valves.

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