High and low temperature gas detection device

Abstract

The utility model relates to a high and low temperature gas detection device. Comprising a drying assembly, a first spiral heat exchange pipe and a second spiral heat exchange pipe, an outlet of an air source box is connected with an inlet of the drying assembly through a first air conveying pipe with a first air conveying electromagnetic valve, and an outlet of the drying assembly is connected with an inlet of the first spiral heat exchange pipe through a second air conveying pipe with a second air conveying electromagnetic valve; an outlet of the first spiral heat exchange pipe is connected with an outlet of the second spiral heat exchange pipe through a third gas conveying pipe with a third gas conveying electromagnetic valve. Temperature probes are mounted on outlets of the drying assembly, the first spiral heat exchange tube and the second spiral heat exchange tube; an outlet of the drying assembly is connected to a detection pipeline of a gas detector through a first detection electromagnetic valve, an outlet of the first spiral heat exchange pipe is connected to a second detection electromagnetic valve, and an outlet of the second spiral heat exchange pipe is connected to a detection pipeline of the gas detector through a third detection electromagnetic valve. According to the utility model, by influencing the temperature and moisture content of high-temperature and low-temperature gas, the gas is dried, the temperature reaches the temperature range of normal working of the gas detector, and the gas is controllably sent to the gas detector for detection, so that the gas detector can effectively detect the gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas detection equipment, and in particular relates to a high and low temperature gas detection device. Background Art

[0002] Gas detectors typically have a temperature limit for the gas they detect. Exceeding this temperature limit will cause the detector to malfunction and, in severe cases, even damage its core detection components. For example, an infrared gas analyzer can measure gas temperatures between 0 and 50°C. Exceeding this temperature limit can cause the infrared gas analyzer to malfunction. In some scenarios, gas alarms require calibration and testing with an infrared gas analyzer. The effectiveness of these calibration and testing depends on the proper functioning of the gas analyzer / detector. Furthermore, gas detectors typically have requirements for the moisture content of the gas being tested. Gases containing water vapor can adversely affect instrument operation and, in severe cases, damage the instrument.

[0003] In summary, it is necessary to develop and design a detection device that can smoothly detect high-temperature gas and low-temperature gas with excessive temperature to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a high and low temperature gas detection device, which affects the temperature and moisture content of high and low temperature gases, makes the gas dry and the temperature reaches the normal working temperature range of the gas detector and is controllably sent to the gas detector for inspection, ensuring that the gas detector can effectively detect the gas.

[0005] The technical solution adopted by the utility model is: a high and low temperature gas detection device, including a gas source box and a gas detector; also including a drying component, a first spiral heat exchange tube and a second spiral heat exchange tube, the outlet of the gas source box is connected to the inlet of the drying component through a first gas supply tube with a first gas supply solenoid valve, the outlet of the drying component is connected to the inlet of the first spiral heat exchange tube through a second gas supply tube with a second gas supply solenoid valve, and the outlet of the first spiral heat exchange tube is connected to the outlet of the second spiral heat exchange tube through a third gas supply tube with a third gas supply solenoid valve; a first temperature probe is installed on the outlet of the drying component, a second temperature probe is installed on the outlet of the first spiral heat exchange tube, and a third temperature probe is installed on the outlet of the second spiral heat exchange tube; the outlet of the drying component is connected to the detection pipeline of the gas detector through the first detection solenoid valve, the outlet of the first spiral heat exchange tube is connected to the detection pipeline of the gas detector through the second detection solenoid valve, and the outlet of the second spiral heat exchange tube is connected to the detection pipeline of the gas detector through the third detection solenoid valve.

[0006] Preferably, it also includes a reflux pipe, the outlet of the drying component is connected to the reflux pipe through a first reflux solenoid valve, the outlet of the first spiral heat exchange tube is connected to the reflux pipe through a second reflux solenoid valve, the outlet of the second spiral heat exchange tube is connected to the reflux pipe through a third reflux solenoid valve, the air outlet of the gas detector is connected to the reflux pipe; the reflux pipe is connected to the reflux port of the gas source box.

[0007] Preferably, the drying component includes a drying tube with a desiccant inside, a detachable upper joint installed at the upper end of the drying tube, and a detachable lower joint installed at the lower end, the first gas pipe is docked with the upper joint, and the second gas pipe is docked with the lower joint.

[0008] Preferably, a cooling fan is installed at the end of the first spiral heat exchange tube, and an electric heating element is installed on the side of the second spiral heat exchange tube.

[0009] Preferably, a manual ball valve is installed on the first gas pipeline.

[0010] Preferably, it also includes a supporting back plate, the drying tube of the drying assembly is fixed on the supporting back plate using a fixing piece, and the first spiral heat exchange tube and the second spiral heat exchange tube are both fixed on the supporting back plate using a fixing seat.

[0011] The advantages and positive effects of the utility model are:

[0012] The utility model provides a high and low temperature gas detection device for use in conjunction with a gas detector. By providing a drying component, the gas to be detected is dried, and the water vapor contained in the gas to be detected is absorbed and removed, thereby achieving the technical effect of protecting the gas detector and improving the effectiveness of gas detection. By providing a first spiral heat exchange tube and a second spiral heat exchange tube, and the two are located in series behind the drying component, the technical effect of affecting the temperature of the high-temperature gas to be detected / the low-temperature gas to be detected by heat exchange is achieved, so that the high-temperature gas to be detected exchanges heat with the surrounding environment to cool down, and the low-temperature gas to be detected exchanges heat with the surrounding environment to heat up, so that the temperature of the gas to be detected reaches the normal operating temperature range of the gas detector and is controllably sent to the gas detector for inspection, ensuring that the gas detector can effectively detect the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a main structural diagram of the present utility model.

[0014] In the picture:

[0015] 1. Gas source box; 2. Manual ball valve; 3. Support back plate; 4. First gas supply pipe; 5. First gas supply solenoid valve; 6. Upper joint; 7. Drying tube; 8. Fixing piece; 9. Lower joint; 10. Return pipe; 11. First return solenoid valve; 12. First temperature probe; 13. First detection solenoid valve; 14. Second gas supply solenoid valve; 15. Cooling fan; 16. Second gas supply pipe; 17. First spiral heat exchange tube; 18. Second return solenoid valve; 19. Second detection solenoid valve; 20. Third gas supply solenoid valve; 21. Electric heating element; 22. Third gas supply pipe; 23. Second spiral heat exchange tube; 24. Second temperature probe; 25. Third return solenoid valve; 26. Third temperature probe; 27. Third detection solenoid valve; 28. Detection pipeline; 29. ​​Gas detector. DETAILED DESCRIPTION

[0016] In order to further understand the content, features and effects of the present invention, the following embodiments are given to illustrate in detail.

[0017] See Figure 1 The high and low temperature gas detection device of the present invention includes a gas source box 1 and a gas detector 29. The gas source box 1 is a box for storing the gas to be detected (which can be high temperature gas, normal temperature gas and low temperature gas). The gas detector 29 is an existing gas detector such as an infrared gas analyzer.

[0018] It also includes a drying component, a first spiral heat exchange tube 17 and a second spiral heat exchange tube 23. The three are connected in series by pipelines. The gas to be tested passes through the drying component, the first spiral heat exchange tube 17 and the second spiral heat exchange tube 23 in sequence. When flowing through the drying component, the moisture in the gas to be tested is retained. When passing through the two-stage spiral heat exchange tubes, the gas to be tested exchanges heat with the surrounding environment, the temperature of the high-temperature gas decreases, and the temperature of the low-temperature gas increases. Finally, the gas sent into the gas detector 29 is dry and meets the detection temperature requirements.

[0019] The outlet of the gas source box 1 is connected to the inlet of the drying assembly via a first gas supply pipe 4 equipped with a first gas supply solenoid valve 5. The outlet of the drying assembly is connected to the inlet of a first spiral heat exchange tube 17 via a second gas supply pipe 16 equipped with a second gas supply solenoid valve 14. The outlet of the first spiral heat exchange tube 17 is connected to the outlet of a second spiral heat exchange tube 23 via a third gas supply pipe 22 equipped with a third gas supply solenoid valve 20. In this embodiment, a manual ball valve 2 is installed on the first gas supply pipe 4.

[0020] The manual ball valve 2 can control the on-off of the main gas circuit, the first gas supply solenoid valve 5 can control the on-off of the first gas supply pipe 4, the second gas supply solenoid valve 14 can control the on-off of the second gas supply pipe 16, and the third gas supply solenoid valve 2 can control the on-off of the third gas supply pipe 22.

[0021] A first temperature probe 12 is installed at the outlet of the drying assembly, a second temperature probe 24 is installed at the outlet of the first spiral heat exchange tube 17, and a third temperature probe 26 is installed at the outlet of the second spiral heat exchange tube 23. The first temperature probe 12 is used to measure the temperature of the gas to be tested after it is discharged from the drying assembly, the second temperature probe 24 is used to measure the temperature of the gas to be tested after it is discharged from the first spiral heat exchange tube 17, and the third temperature probe 26 is used to measure the temperature of the gas to be tested after it is discharged from the second spiral heat exchange tube 23. The temperature values ​​at these three points are used to determine whether the gas to be tested at the current location meets the required temperature. If the temperature meets the required temperature, the gas is directly fed into the gas detector 29 without being diverted. If the temperature does not meet the required temperature, the gas is diverted and subjected to temperature control.

[0022] The outlet of the drying component is connected to the detection pipeline 28 of the gas detector 29 through the first detection solenoid valve 13. The outlet of the first spiral heat exchange tube 17 is connected to the detection pipeline 28 of the gas detector 29 through the second detection solenoid valve 19. The outlet of the second spiral heat exchange tube 23 is connected to the detection pipeline 28 of the gas detector 29 through the third detection solenoid valve 27. By controlling the on and off of the first detection solenoid valve 13, the second detection solenoid valve 19, and the third detection solenoid valve 27, the gas path between each component and the gas detector 29 is selected.

[0023] The system also includes a return pipe 10. The outlet of the drying component is connected to the return pipe 10 via a first return solenoid valve 11, the outlet of the first spiral heat exchange tube 17 is connected to the return pipe 10 via a second return solenoid valve 18, and the outlet of the second spiral heat exchange tube 23 is connected to the return pipe 10 via a third return solenoid valve 25. By controlling the first return solenoid valve 11, the second return solenoid valve 18, and the third return solenoid valve 25, the gas path between each component and the return pipe 10 is selected. The gas outlet of the gas detector 29 is connected to the return pipe 10; the return pipe 10 is connected to the return port of the gas source box 1, so that the detection gas circulates.

[0024] In this embodiment, the drying assembly includes a drying tube 7 containing a desiccant, which can be granular anhydrous calcium chloride. A detachable upper connector 6 is mounted at the upper end of the drying tube 7, and a detachable lower connector 9 is mounted at the lower end. The first gas pipe 4 is butt-connected to the upper connector 6, and the second gas pipe 16 is butt-connected to the lower connector 9. The desiccant can be replaced by disassembling the drying tube 7, the upper connector 6, and the lower connector 9.

[0025] In this embodiment, a cooling fan 15 is installed at the end of the first spiral heat exchange tube 17, and an electric heater 21 is installed on the side of the second spiral heat exchange tube 23. The cooling fan 15 is used to enhance the cooling effect on the high-temperature gas to be tested, and the cooling airflow flows axially through the first spiral heat exchange tube 17. The electric heater 21 is used to enhance the heating effect on the low-temperature gas to be tested. If the temperature of the gas to be tested after passing through the drying assembly meets the requirements, the cooling fan 15 and the electric heater 21 do not need to be activated.

[0026] This embodiment also includes a support back plate 3. The drying tube 7 of the drying assembly is mounted on the support back plate 3 using a fixing member 8. The first spiral heat exchange tube 17 and the second spiral heat exchange tube 23 are both mounted on the support back plate 3 using fixing bases. The support back plate 3 is used to support the various components and clearly and neatly arrange the components, pipelines, solenoid valves, etc.

[0027] The system also includes a temperature-based controller that controls the on / off switching of each solenoid valve based on the received temperature signal. The first, second, and third temperature probes 12, 24, and 26 are connected to the controller. The first, second, and third gas supply solenoid valves 5, 14, and 20 are also connected to the controller. The first, second, and third detection solenoid valves 13, 19, and 27 are also connected to the controller. The first, second, and third return solenoid valves 11, 18, and 25 are also connected to the controller. The cooling fan 15 and the electric heater 21 are also connected to the controller.

[0028] How to run:

[0029] Open the manual ball valve 2 and the first gas supply solenoid valve 5. The power of the entire gas circuit comes from the gas detector 29, which has a built-in air pump and flow meter. The gas detector 29 extracts the gas to be tested from the gas source box 1 and returns it to the gas source box 1 after completing the test procedure. During this process, the gas concentration is continuously and in real time. A constant gas flow rate is formed in the gas detector 29, and the flow rate is usually set to 1L / min.

[0030] In step 1, the first reflux solenoid valve 11 is opened, and the gas to be tested passes through the drying assembly and enters the reflux pipe 10. If the first temperature probe 12 detects that the temperature of the gas to be tested is within the set range, the first detection solenoid valve 13 is directly opened to guide the gas to be tested into the detection pipeline 28 of the gas detector 29. If the first temperature probe 12 detects that the temperature of the gas to be tested is not within the set range, step 2 is performed.

[0031] Step 2: Close the first reflux solenoid valve 11, open the second gas supply solenoid valve 14 and the second reflux solenoid valve 18, and the gas to be tested passes through the first spiral heat exchange tube 17 and enters the reflux pipe 10. If the second temperature probe 24 detects that the temperature of the gas to be tested is within the set range, the second detection solenoid valve 19 is directly opened to introduce the gas to be tested into the detection pipeline 28 of the gas detector 29. If the second temperature probe 24 detects that the temperature of the gas to be tested exceeds the set range, the cooling fan 15 is turned on for forced cooling until the temperature detected by the second temperature probe 24 is within the set range, then the second detection solenoid valve 19 is opened. If the second temperature probe 24 detects that the temperature of the gas to be tested is lower than the set range, step 3 is performed.

[0032] Step 3: Close the second reflux solenoid valve 18, open the third gas supply solenoid valve 20 and the third reflux solenoid valve 25, and the gas to be tested passes through the second spiral heat exchange tube 23 and enters the reflux pipe 10. If the third temperature probe 26 detects that the temperature of the gas to be tested is within the set range, the third detection solenoid valve 27 is directly opened to introduce the gas to be tested into the detection pipeline 28 of the gas detector 29. If the third temperature probe 26 detects that the temperature of the gas to be tested is still lower than the set range, the electric heating element 21 is controlled to be powered on and heated until the temperature detected by the third temperature probe 26 is within the set range and then the third detection solenoid valve 27 is opened.

Claims

1. A high and low temperature gas detection device, comprising a gas source box (1) and a gas detector (29); characterized in that: The invention also includes a drying component, a first spiral heat exchange tube (17) and a second spiral heat exchange tube (23), wherein the outlet of the gas source box (1) is connected to the inlet of the drying component via a first gas supply tube (4) with a first gas supply solenoid valve (5), the outlet of the drying component is connected to the inlet of the first spiral heat exchange tube (17) via a second gas supply tube (16) with a second gas supply solenoid valve (14), and the outlet of the first spiral heat exchange tube (17) is connected to the outlet of the second spiral heat exchange tube (23) via a third gas supply tube (22) with a third gas supply solenoid valve (20); a first temperature probe (11) is installed at the outlet of the drying component. 2), a second temperature probe (24) is installed at the outlet of the first spiral heat exchange tube (17), and a third temperature probe (26) is installed at the outlet of the second spiral heat exchange tube (23); the outlet of the drying component is connected to the detection pipeline (28) of the gas detector (29) through the first detection solenoid valve (13), the outlet of the first spiral heat exchange tube (17) is connected to the detection pipeline (28) of the gas detector (29) through the second detection solenoid valve (19), and the outlet of the second spiral heat exchange tube (23) is connected to the detection pipeline (28) of the gas detector (29) through the third detection solenoid valve (27).

2. The high and low temperature gas detection device according to claim 1, characterized in that: The invention also includes a return pipe (10), wherein the outlet of the drying component is connected to the return pipe (10) via a first return solenoid valve (11), the outlet of the first spiral heat exchange tube (17) is connected to the return pipe (10) via a second return solenoid valve (18), the outlet of the second spiral heat exchange tube (23) is connected to the return pipe (10) via a third return solenoid valve (25), and the gas outlet of the gas detector (29) is connected to the return pipe (10); and the return pipe (10) is connected to the return port of the gas source box (1).

3. The high and low temperature gas detection device according to claim 2, characterized in that: The drying assembly comprises a drying tube (7) with a desiccant inside, a detachable upper joint (6) installed at the upper end of the drying tube (7), and a detachable lower joint (9) installed at the lower end, a first gas delivery pipe (4) being butt-connected to the upper joint (6), and a second gas delivery pipe (16) being butt-connected to the lower joint (9).

4. The high and low temperature gas detection device according to claim 3, characterized in that: A cooling fan (15) is installed at the end of the first spiral heat exchange tube (17), and an electric heating element (21) is installed on the side of the second spiral heat exchange tube (23).

5. The high and low temperature gas detection device according to claim 4, characterized in that: A manual ball valve (2) is installed on the first gas transmission pipe (4).

6. The high and low temperature gas detection device according to any one of claims 1 to 5, characterized in that: It also includes a supporting back plate (3), a drying tube (7) of the drying assembly is mounted and fixed on the supporting back plate (3) using a fixing member (8), and a first spiral heat exchange tube (17) and a second spiral heat exchange tube (23) are both mounted and fixed on the supporting back plate (3) using a fixing seat.

Images