Dangerous gas detection device

Abstract

The utility model discloses a hazardous gas detection device which comprises a detection mechanism, a power mechanism and an electric control mechanism, the detection mechanism comprises a box body, a sample gas inlet and a gas detector, the sample gas inlet and the gas detector are arranged in the box body, and an inlet of the gas detector is communicated with the sample gas inlet; the power mechanism comprises a compressed air inlet, a jet sampler and an exhaust port which are installed in the box body, the compressed air inlet is communicated with an outlet of the air compressor, the jet sampler comprises a suction pipe, a diffuser pipe and a spray pipe, an inlet of the suction pipe is communicated with an outlet of the gas detector, an inlet of the diffuser pipe is communicated with the compressed air inlet, and an outlet of the jet sampler is communicated with the exhaust port. An outlet of the suction pipe, an outlet of the diffuser pipe and an inlet of the spray pipe are communicated; an outlet of the spray pipe is communicated with the exhaust port; the gas supply device has the beneficial effects that under the negative pressure action of the suction pipe, the sample gas passes through the sample gas inlet and enters the gas detector, and the gas detector detects the sample gas, so that the gas supply amount is accurate.

Description

Technical Field

[0001] The utility model relates to the field of gas turbine power generation, and particularly relates to a dangerous gas detection device. Background Art

[0002] Under the background of increasingly strict environmental governance, traditional thermal power generation has gradually been replaced by gas turbine power generation. Gas turbine power generation uses natural gas as fuel. If natural gas leaks during the power generation process, serious consequences will occur. Therefore, monitoring whether natural gas leaks is the top priority of the safety management of gas turbine power generation.

[0003] In the related art, a dangerous gas monitoring device is proposed, which includes a main body module. The main body module includes a base, a fixing frame installed on the inner wall of the base, a gas sensor installed on the fixing frame, supports symmetrically fixed at the end of the base, a gas supply component installed on the inner wall of the support, a connecting pipe fixed on the outer side of the support and communicated with the support, an extension pipe engaged at the end of the connecting pipe, and an air outlet pipe fixed on the outer side of the base and opposite to the support. The base is used to install the gas component and at the same time used to install the functional module. Through holes are symmetrically opened at the top of the base for air circulation. The gas supply component faces the inner cavity of the through hole and includes a support fixed on the inner wall of the support, a motor installed on the support, and a fan fixedly sleeved on the motor shaft.

[0004] Aiming at the above related art, the following defects exist: Using the rotation of the fan driven by the motor as the power for air supply not only has high energy consumption and large occupied space, but also there is a certain delay in the start and stop of the motor, which leads to low air supply efficiency, inaccurate air supply volume, and affects the detection accuracy. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above technical deficiencies, and propose a dangerous gas detection device to solve the technical problems of low air supply efficiency and inaccurate air supply volume in the existing technology.

[0006] To achieve the above technical purpose, the technical solution of the utility model provides a dangerous gas detection device, including a detection mechanism. The detection mechanism includes a box body and a sample gas inlet and a gas detector arranged in the box body. The inlet of the gas detector is communicated with the sample gas inlet;

[0007] A power mechanism, the power mechanism includes a compressed air inlet, a jet sampler and an exhaust port installed in the box body. The compressed air inlet is communicated with the outlet of an air compressor. The jet sampler includes a suction pipe, a diffuser pipe and a nozzle. The inlet of the suction pipe is communicated with the outlet of the gas detector. The inlet of the diffuser pipe is communicated with the compressed air inlet. The outlet of the suction pipe, the outlet of the diffuser pipe and the inlet of the nozzle are communicated. The outlet of the nozzle is communicated with the exhaust port; and,

[0008] The electric control mechanism is used to control the input voltage and output current of the detection mechanism and the power mechanism.

[0009] In some embodiments, the detection mechanism further includes a water vapor separator and a drain port disposed inside the box. The inlet of the water vapor separator is communicated with the sample gas inlet. The first outlet of the water vapor separator is communicated with the inlet of the gas detector. The second outlet of the water vapor separator is communicated with the drain port.

[0010] In some embodiments, the detection mechanism further includes a calibration switching valve disposed inside the box. The inlet of the calibration switching valve is communicated with the first outlet of the water vapor separator. The outlet of the calibration switching valve is communicated with the inlet of the gas detector.

[0011] In some embodiments, the detection mechanism further includes a rotameter and a flow monitor disposed inside the box. The inlet of the rotameter is communicated with the outlet of the calibration switching valve. The outlet of the rotameter is communicated with the inlet of the flow monitor. The outlet of the flow monitor is communicated with the inlet of the gas detector.

[0012] In some embodiments, the power mechanism further includes a compressed air regulating valve installed inside the box. The inlet of the compressed air regulating valve is communicated with the compressed air inlet. The outlet of the compressed air regulating valve is communicated with the inlet of the diffuser tube.

[0013] In some embodiments, the electric control mechanism includes a terminal block and an inlet port disposed inside the box. The terminal block is electrically connected to the detection mechanism and the power mechanism through a cable. The inlet port allows the cable to pass through.

[0014] In some embodiments, the electric control mechanism further includes a grounding terminal disposed on the box.

[0015] In some embodiments, the electric control mechanism further includes a guide rail disposed inside the box. A support plate is slidably connected to the guide rail. The terminal block is disposed on the support plate. An adjusting assembly for adjusting the position of the terminal block is provided on the guide rail.

[0016] In some embodiments, the adjusting assembly includes a bolt threadedly connected to the support plate. The end of the bolt is used to abut against the side wall of the guide rail.

[0017] In some embodiments, an elastic layer is provided on one side of the guide rail close to the bolt. An anti-slip layer is provided on one side of the elastic layer close to the bolt.

[0018] Compared with the prior art, the beneficial effects of the present utility model include:

[0019] Under the action of the jet sampler, the compressed air sequentially passes through the compressed air inlet, the diffuser tube, the nozzle, and the exhaust port, thereby creating a negative pressure at the suction pipe. The sample gas passes through the sample gas inlet and enters the gas detector. The gas detector detects the sample gas, and the sample gas is discharged after passing through the suction pipe, the nozzle, and the exhaust port in sequence. The jet sampler is composed of a suction pipe, a diffuser tube, and a nozzle, with a simple structure, high integration level, small occupied space, and low later maintenance cost. Under the control of the compressed air regulating valve, the air supply volume is accurate, improving the measurement accuracy. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the detection mechanism, the power mechanism, and the electronic control mechanism provided by the present utility model;

[0021] Figure 2 is a cross-sectional view of the overall structure of the electronic control mechanism provided by the present utility model.

[0022] Description of the Reference Numerals:

[0023] 1. Detection mechanism; 11. Box body; 12. Sample gas inlet; 13. Gas detector; 14. Moisture separator; 15. Drainage port; 16. First outlet; 17. Second outlet; 18. Calibration switching valve; 2. Power mechanism; 21. Compressed air inlet; 22. Jet sampler; 23. Exhaust port; 24. Suction pipe; 25. Diffuser tube; 26. Nozzle; 27. Compressed air regulating valve; 3. Electronic control mechanism; 31. Wiring terminal; 32. Inlet port; 33. Grounding terminal; 34. Guide rail; 35. Support plate; 4. Rotameter; 5. Flow monitor; 6. Adjusting assembly; 61. Bolt; 62. Elastic layer; 63. Anti-slip layer. Detailed Embodiment

[0024] In order to make the purpose, technical solutions, and advantages of the present utility model clearer, the following further describes the present utility model in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] The present utility model provides a hazardous gas detection device, the structure of which is as Figure 1 - Figure 2 shown, including a detection mechanism 1, a power mechanism 2, and an electronic control mechanism 3.

[0026] The detection mechanism 1 includes a box body 11 and a sample gas inlet 12 and a gas detector 13 installed in the box body 11. The inlet of the gas detector 13 is communicated with the sample gas inlet 12.

[0027] The power mechanism 2 includes a compressed air inlet 21, a jet sampler 22, and an exhaust port 23 installed in the box body 11. The compressed air inlet 21 is communicated with the outlet of an air compressor. The jet sampler 22 includes a suction pipe 24, a diffuser pipe 25, and a nozzle 26. The inlet of the suction pipe 24 is communicated with the outlet of the gas detector 13. The inlet of the diffuser pipe 25 is communicated with the compressed air inlet 21. The outlet of the suction pipe 24, the outlet of the diffuser pipe 25, and the inlet of the nozzle 26 are communicated with each other. The outlet of the nozzle 26 is communicated with the exhaust port 23.

[0028] The electric control mechanism 3 is used to control the input voltage and output current of the detection mechanism 1 and the power mechanism 2.

[0029] During use, under the control of the electric control mechanism 3, the input voltage of the gas detector 13 is 24 VDC and the output current is 4 - 20 mA. After starting the jet sampler 22, under the action of the air compressor, the compressed air sequentially passes through the compressed air inlet 21, the diffuser pipe 25, the nozzle 26, and the exhaust port 23, thereby forming a negative pressure at the suction pipe 24. The sample gas passes through the sample gas inlet 12 and enters the gas detector 13. The gas detector 13 detects the components of the sample gas. Finally, the sample gas sequentially passes through the suction pipe 24, the nozzle 26, and the exhaust port 23 and then is discharged.

[0030] In the present utility model, the compressed air sequentially passes through the compressed air inlet 21, the diffuser pipe 25, the nozzle 26, and the exhaust port 23, thereby forming a negative pressure at the suction pipe 24. The sample gas passes through the sample gas inlet 12 and enters the gas detector 13. The gas detector 13 detects the sample gas. The sample gas sequentially passes through the suction pipe 24, the nozzle 26, and the exhaust port 23 and then is discharged. The jet sampler 22 is composed of a suction pipe 24, a diffuser pipe 25, and a nozzle 26, with a simple structure, high integration level, small occupied space, and low later maintenance cost. Under the control of the compressed air regulating valve 27, the air delivery volume is accurate, improving the measurement accuracy.

[0031] To improve the dryness of the sample gas, please refer to Figure 1 , in a preferred embodiment, the detection mechanism 1 further includes a water vapor separator 14 and a drain port 15 installed in the box body 11. The inlet of the water vapor separator 14 is communicated with the sample gas inlet 12. The first outlet 16 of the water vapor separator 14 is communicated with the inlet of the gas detector 13. The second outlet 17 of the water vapor separator 14 is communicated with the drain port 15.

[0032] During use, the sample gas passes through the sample gas inlet 12 and enters the water vapor separator 14. The moisture in the sample gas is discharged through the drain port 15. After being dried, the sample gas enters the gas detector 13. The water vapor separator 14 plays a role in drying the sample gas, improving the detection accuracy of the gas detector 13 and reducing the possibility of damage to the gas detector 13.

[0033] To improve the detection accuracy, please refer to Figure 1 , in a preferred embodiment, the detection mechanism 1 further includes a calibration switching valve 18 installed in the box 11. The inlet of the calibration switching valve 18 is communicated with the first outlet 16 of the water vapor separator 14, and the outlet of the calibration switching valve 18 is communicated with the inlet of the gas detector 13.

[0034] During use, the calibration switching valve 18 mainly plays the role of calibrating the zero mark and range. Regular calibration can improve the measurement accuracy.

[0035] To monitor the flow rate of the sample gas, please refer to Figure 1 , in a preferred embodiment, the detection mechanism 1 further includes a rotameter 4 and a flow monitor 5 installed in the box 11. The inlet of the rotameter 4 is communicated with the outlet of the calibration switching valve 18, the outlet of the rotameter 4 is communicated with the inlet of the flow monitor 5, and the outlet of the flow monitor 5 is communicated with the inlet of the gas detector 13.

[0036] During use, the input voltage of the flow monitor 5 is 24 VDC and the output current is 4 - 20 mA. The sample gas passes through the rotameter 4 and the flow monitor 5 in sequence and then enters the gas detector 13. The staff can determine the flow rate of the sample gas by observing the rotameter 4. The rotameter 4 is generally adjusted to 500 ml - 1000 ml / min; the flow monitor 5 converts the flow signal into an electrical signal. Approximately 1 mA is equivalent to 15 ml / min, and the alarm value is generally adjusted to 6 mA. When the flow rate of the sample gas is too low, an alarm will be given in a timely manner.

[0037] To control the suction force of the jet sampler 22, please refer to Figure 1 , in a preferred embodiment, the power mechanism 2 further includes a compressed air regulating valve 27 installed in the box 11. The inlet of the compressed air regulating valve 27 is communicated with the compressed air inlet 21, and the outlet of the compressed air regulating valve 27 is communicated with the inlet of the diffuser tube 25.

[0038] During use, the instrument air passes through the compressed air regulating valve 27 and then enters the diffuser tube 25. The compressed air regulating valve 27 adjusts the flow rate of the instrument air entering the diffuser tube 25, thereby controlling the suction force of the suction pipe 24, and thus controlling the intake speed and intake volume of the sample gas.

[0039] To improve the convenience of connecting the internal cable and the external cable, please refer to Figure 1, in a preferred embodiment, the electric control mechanism 3 includes a terminal block 31 and an inlet 32 installed in the box body 11. The terminal block 31 is electrically connected to the detection mechanism 1 and the power mechanism 2 through a cable, and the inlet 32 allows the cable to pass through.

[0040] During use, the external cable passes through the inlet 32 and is connected to one end of the terminal block 31, and the internal cable is connected to the other end of the terminal block 31, which improves the convenience of connecting the internal cable and the external cable, and is convenient for disassembly and assembly, facilitating later circuit maintenance and replacement.

[0041] For improving safety, please refer to Figure 1 , in a preferred embodiment, the electric control mechanism 3 further includes a grounding terminal 33 provided on the box body 11.

[0042] During use, the possibility of electric leakage is reduced, and safety is improved.

[0043] For further improving the convenience of connecting the internal cable and the external cable, please refer to Figure 2 , in a preferred embodiment, the electric control mechanism 3 further includes a guide rail 34 fixedly connected inside the box body 11. A support plate 35 is slidably connected to the guide rail 34 along the length direction of the guide rail 34. The terminal block 31 is installed on the support plate 35, and an adjustment assembly 6 for adjusting the position of the terminal block 31 is provided on the guide rail 34.

[0044] During use, according to the lengths and positions of the internal cable and the external cable, the adjustment assembly 6 can be used to adjust the position of the terminal block 31, so that the internal cable and the external cable can be more easily installed on the terminal block 31 without re-wiring, improving convenience.

[0045] For adjusting the position of the terminal block 31, please refer to Figure 2 , in a preferred embodiment, the adjustment assembly 6 includes a bolt 61 threadedly connected to the support plate 35, and the end of the bolt {61} is used to abut against the side wall of the guide rail 34.

[0046] During use, before pushing the support plate 35 to slide along the guide rail 34, loosen the bolt 61. After sliding the support plate 35 to a predetermined position, tighten the bolt 61. The end of the bolt 61 abuts tightly against the side wall of the guide rail 34, and the support plate 35 is fixed, and the terminal block 31 is fixed.

[0047] For improving the stability of the fixation of the terminal block 31, please refer to Figure 2 , in a preferred embodiment, an elastic layer 62 is fixedly connected to one side of the guide rail 34 close to the bolt 61. The elastic layer 62 is a rubber pad, and an anti-slip layer is provided on one side of the elastic layer 62 close to the bolt 61. The anti-slip layer is an array of grooves provided on the elastic layer 62.

[0048] During use, when the bolt 61 abuts against the side wall of the guide rail 34, the elastic layer 62 is squeezed and deformed, so that the bolt 61 fits more closely with the guide rail 34, the fixation is more stable, and the anti-slip layer improves the friction between the bolt 61 and the guide rail 34, further enhancing the stability.

[0049] To better understand the present utility model, the following is combined with Figure 1 - Figure 2 The working principle of a technical solution of the present utility model, a hazardous gas detection device, will be described in detail: Under the control of the electric control mechanism 3, the input voltage of the gas detector 13 is 24VDC, and the output current is 4 - 20mA. After starting the jet sampler 22, under the action of the air compressor, the compressed air sequentially passes through the compressed air inlet 21, the diffuser tube 25, the nozzle 26, and the exhaust port 23, thereby forming a negative pressure at the suction pipe 24. The sample gas passes through the sample gas inlet 12 and enters the gas detector 13. The gas detector 13 detects the components of the sample gas, and finally the sample gas is discharged after passing through the suction pipe 24, the nozzle 26, and the exhaust port 23 in sequence.

[0050] The specific embodiments of the present utility model described above do not constitute a limitation to the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included in the protection scope of the claims of the present utility model.

Claims

1. A hazardous gas detection device, characterized in that, Comprising: A detection mechanism, the detection mechanism includes a box body and a sample gas inlet and a gas detector arranged in the box body, and the inlet of the gas detector is communicated with the sample gas inlet; A power mechanism, the power mechanism includes a compressed air inlet, a jet sampler and an exhaust port installed in the box body, the compressed air inlet is communicated with the outlet of an air compressor, the jet sampler includes a suction pipe, a diffuser pipe and a nozzle, the inlet of the suction pipe is communicated with the outlet of the gas detector, the inlet of the diffuser pipe is communicated with the compressed air inlet, the outlet of the suction pipe, the outlet of the diffuser pipe and the inlet of the nozzle are communicated, and the outlet of the nozzle is communicated with the exhaust port; and, An electric control mechanism, the electric control mechanism is used to control the input voltage and output current of the detection mechanism and the power mechanism.

2. The hazardous gas detection device according to claim 1, wherein The detection mechanism further includes a water vapor separator and a drain port arranged in the box body, the inlet of the water vapor separator is communicated with the sample gas inlet, the first outlet of the water vapor separator is communicated with the inlet of the gas detector, and the second outlet of the water vapor separator is communicated with the drain port.

3. A hazardous gas detection device according to claim 2, characterized in that The detection mechanism further includes a calibration switching valve arranged in the box body, the inlet of the calibration switching valve is communicated with the first outlet of the water vapor separator, and the outlet of the calibration switching valve is communicated with the inlet of the gas detector.

4. The hazardous gas detection device according to claim 3, wherein The detection mechanism further includes a rotameter and a flow monitor arranged in the box body, the inlet of the rotameter is communicated with the outlet of the calibration switching valve, the outlet of the rotameter is communicated with the inlet of the flow monitor, and the outlet of the flow monitor is communicated with the inlet of the gas detector.

5. A hazardous gas detection device according to claim 1, characterized in that, The power mechanism further includes a compressed air regulating valve installed in the box body, the inlet of the compressed air regulating valve is communicated with the compressed air inlet, and the outlet of the compressed air regulating valve is communicated with the inlet of the diffuser pipe.

6. The hazardous gas detection device according to claim 1, characterized in that, The electric control mechanism includes a terminal block and an inlet port arranged in the box body, the terminal block is electrically connected to the detection mechanism and the power mechanism through a cable, and the inlet port allows the cable to pass through.

7. A hazardous gas detection device according to claim 1, characterized in that, The electric control mechanism further includes a grounding terminal arranged on the box body.

8. A hazardous gas detection device according to claim 6, characterized in that, The electric control mechanism further includes a guide rail arranged in the box body, a support plate is slidably connected to the guide rail, the terminal block is arranged on the support plate, and an adjusting component for adjusting the position of the terminal block is arranged on the guide rail.

9. The hazardous gas detection device according to claim 8, characterized in that, The adjusting component includes a bolt threadedly connected to the support plate, and the end of the bolt is used to abut against the side wall of the guide rail.

10. A hazardous gas detection device according to claim 9, characterized in that, An elastic layer is arranged on one side of the guide rail close to the bolt, and an anti-slip layer is arranged on one side of the elastic layer close to the bolt.

Images