A gas detection device and its detection method

Abstract

The present invention relates to the field of gas technology, and specifically relates to a gas detection device and a detection method thereof. It includes a first protective shell and a second protective shell. The left end and the right end of the first protective shell are both communicated with connecting hoses, and connecting heads are arranged at the left end and the right end of each connecting hose. Each sealing ring and each fixing block cooperate with each other. An electromagnetic control valve one and an electromagnetic control valve two are respectively arranged on the left side and the right side of the buffer box, and both the electromagnetic control valve one and the electromagnetic control valve two are communicated with the connecting hoses. And a group of protective rings are sleeved on the circumferential outer wall of the connecting line, and each protective ring is fixedly connected to the top of the first protective shell and the bottom of the second protective shell. An upper region of the front end of the second protective shell is provided with a display screen, and a plurality of control keys are arranged on the front end of the control box, so as to make the detection data relatively accurate, and an alarm will be given in the initial stage of leakage, the probability of false alarm is relatively low, and active intervention will be carried out, and the practicability is relatively high.

Description

Technical Field

[0001] The present invention relates to the technical field of gas, and specifically to a gas detection device and a detection method thereof. Background Art

[0002] As is well known, gas is the general term for gaseous fuels, which can burn to release heat for use by residents and industrial enterprises. There are many types of gas, mainly including natural gas, artificial gas, liquefied petroleum gas, biogas, and coal gas. The main component of natural gas is methane, which is physiologically harmless to humans but has an asphyxiating effect. The gas of liquefied petroleum gas is 1.5 - 2.0 times heavier than air. In the air, it is like water, flowing to low-lying areas and staying there, and can be dispersed by the wind. If the liquefied petroleum gas in the steel cylinder flows out in a liquid state, it will become about 250 - 300 times the gas and diffuse. When burning normally, it is a light blue smokeless flame. If the flame is yellow and has smoke, it indicates that the primary air volume is insufficient. At this time, the liquefied petroleum gas is not completely burned, and the carbon monoxide generated by combustion will cause poisoning.

[0003] Most of the existing gas detection devices will alarm only when the gas leaks to a certain concentration. In the initial stage of gas leakage, since the gas concentration is relatively low, there will be no alarm, and the accuracy of the detection data is relatively low, often resulting in false alarms. In addition, in other existing patent solutions, acoustic sensors are used for natural gas leakage. For example, in the existing patent technology CN110878913A, which is a safety protection early warning system for natural gas risers in high-rise buildings, an acoustic sensor is used. The acoustic sensor real-time detects the acoustic intensity information when an acoustic signal appears outside the riser and sends the acoustic intensity information to the cloud analysis platform to analyze the acoustic signal to obtain a leakage signal. Although it can realize automatic remote monitoring of leakage, this acoustic sensor is easily interfered by clutter signals and cannot effectively distinguish tiny leaks. In other patent solutions, it is necessary to rely on a pressure sensor to detect the airflow fluctuation signal after leakage. Therefore, it depends on the accuracy and sensitivity of this pressure sensor, and the cost of a high-precision pressure sensor is relatively high. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a gas detection device and a detection method thereof with relatively accurate detection data, which will alarm in the initial stage of leakage, have a relatively low false alarm probability, and will actively intervene, and have relatively high practicability.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the present invention provides the following technical solution: A gas detection device includes a first protective shell and a second protective shell. The left end and the right end of the first protective shell are both connected with connecting hoses, and the left end and the right end of each connecting hose are both provided with connectors. Inside each connector is a fixed block, and the left end and the right end of the circumferential inner wall of each fixed block and the circumferential outer wall of the connecting hose are sleeved and connected. Sealing rings are sleeved on the circumferential outer wall of the left end and the circumferential outer wall of the right end of the connecting hose. Each sealing ring cooperates with each fixed block. A threaded connection port is sleeved on the circumferential inner wall of each connector. A first chamber is opened inside the first protective shell, and a buffer box is arranged on the inner bottom wall of the first protective shell through a group of legs. Sonar receivers are arranged on the left side wall and the right side wall of the buffer box, and a pressure sensor box is arranged on the inner top wall of the buffer box. The connecting hose passes through the first protective shell and extends into the interior of the first protective shell, and the connecting hose is communicated with the buffer box. An electromagnetic control valve one and an electromagnetic control valve two are respectively arranged on the left side and the right side of the buffer box, and both the electromagnetic control valve one and the electromagnetic control valve two are communicated with the connecting hose. A connecting line is connected between the left side of the top end of the first protective shell and the left side of the bottom end of the second protective shell, and a group of protective rings are sleeved on the circumferential outer wall of the connecting line. Each protective ring is fixedly connected to the top end of the first protective shell and the bottom end of the second protective shell. Inside the pressure sensor box is a pressure sensor and a trigger sounding thin sheet. The trigger sounding thin sheet is connected to the bottom of the pressure sensor box body, and the bottom of the body is a pickup diaphragm. Sound holes facing the two side sonar receivers are respectively arranged on the side part of the pressure sensor box body;

[0008] On the upper front area of the second protective shell is provided a display screen, and on the lower area of the display screen is provided a control box. A plurality of control keys are arranged on the front end of the control box, and a label is arranged on the lower area of the control box. A second chamber is opened inside the second protective shell. An audio controller is arranged on the inner bottom wall of the second protective shell. An audio receiver is arranged on the right end of the audio controller. A control main board is arranged on the right end of the audio receiver. A power supply is arranged on the top end of the control main board. A wireless signal receiver is arranged on the left end of the power supply. A data memory is arranged on the left end of the wireless signal receiver. An electromagnetic controller is arranged on the left end of the data memory. A network connector is arranged on the left end of the electromagnetic controller. A partition is connected between the left side wall and the right side wall of the protective shell. Connecting rods are arranged on the left side wall, the right side wall, the inner top wall of the protective shell and the top end of the partition, and one end of each connecting rod is connected with a speaker one. A sound transmission hole is opened at the rear end of the second protective shell.

[0009] Preferably, sealing gaskets one are sleeved on the circumferential outer wall of the left end and the circumferential outer wall of the right end of the connecting hose, and each sealing gasket one is rotatably connected with the connector.

[0010] Preferably, adjusting handles are sleeved on the circumferential outer wall of each connector.

[0011] Preferably, a square hole is formed in the lower region at the left end of the second protective shell, and a wiring port is arranged in the square hole.

[0012] Preferably, support points two and support point one are respectively arranged at the four corners of the rear end of the first protective shell and at the four corners of the rear end of the second protective shell.

[0013] Preferably, hanging holes one are arranged at the four corners of the rear end of the second protective shell, and hanging pieces are symmetrically arranged at the rear end of the first protective shell, and hanging holes two are arranged on each hanging piece.

[0014] Preferably, a plurality of heat dissipation holes are arranged in the lower region at the rear end of the second protective shell.

[0015] A detection method for the gas detection device as described above includes the following steps:

[0016] Step one: Fix the device on the wall through the hanging holes one and two, connect an external power supply, connect through each connector and pipeline, and set the device through the control keys and the display screen;

[0017] Step two: Sense the air pressure value through the pressure sensor box. Under normal circumstances, when the pressure is stable, the device operates normally. When the pressure is unstable and exceeds the fluctuation threshold, the device gives a preset alarm. If the pressure value fluctuates slightly, the flow of the natural gas generates vibration on the pickup diaphragm of the pressure sensor box, and the pickup diaphragm causes the vibration of the triggering sounding sheet to generate sound, so that the vibration is amplified and the acoustic wave signal caused by the vibration is transmitted to the sonar receivers on both sides through the two sound holes on the side of the pressure sensor box body;

[0018] Step three: When a leakage occurs, after the signal received by the sonar receiver exceeds the threshold, a warning is given, and the signal magnitudes of the signals of the two sonar receivers are compared, and the side with the larger assistance is used as the leakage side. When a leakage occurs on the left side, the electromagnetic controller controls the first electromagnetic control valve to close. When a leakage occurs on the right side, the electromagnetic controller controls the second electromagnetic control valve to close, and remote alarm is carried out through the network connector for timely emergency repair;

[0019] Step four: Transmit signal data to the user through the wireless signal receiver, analyze the sound waves received by the sonar receiver through the audio receiver, and transmit them to the control main board for the next operation and control.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a gas detection device, which has the following beneficial effects:

[0022] 1. In the present invention, there is no need for a pressure sensor to have high detection accuracy and sensitivity. For vibrations caused by small leakage signals, vibration signal amplification can be achieved through the diaphragm and the trigger sounding sheet, so as to realize reliable multi - means organic fusion detection. While improving the detection reliability and sensitivity, there is no need to set high - precision detection sensors at the same time.

[0023] 2. For this gas detection device, the threaded connection port facilitates the connection of the device, which is convenient and simple, and at the same time reduces the probability of leakage. The device can be remotely monitored through the network connector, which is convenient for maintenance personnel to perform timely maintenance on the device. The pipeline can be timely closed through the cooperation between the first electromagnetic control valve and the second electromagnetic control valve to prevent excessive gas leakage, which may cause fire or explosion. The leakage of gas is received and observed through the sonar receiver and the audio receiver, and the gas leakage is timely feedback, increasing the accuracy of the alarm. And through the cooperation between the electromagnetic controller and the control main board, the electromagnetic control valve is timely controlled to reduce the gas leakage amount. Through the cooperation between the sound controller and the first speaker, timely sound alarm is carried out to remind people to react in time and prevent personal danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention;

[0025] Figure 2 is a schematic structural diagram of the rear end of the present invention;

[0026] Figure 3 is a schematic structural diagram of the interior of the present invention;

[0027] Figure 4 is the present invention Figure 3 a magnified schematic structural diagram of part A in;

[0028] Figure 5 is the present invention Figure 3 a magnified schematic structural diagram of part B in.

[0029] In the figure: 1. First protective shell; 2. Connector; 3. Protective ring; 4. Connecting wire; 5. Label; 6. Second protective shell; 7. Control key; 8. Control box; 9. Display screen; 10. First support point; 11. First hanging hole; 12. Sound transmission hole; 13. Heat dissipation hole; 14. Second support point; 15. Hanging piece; 16. Second hanging hole; 17. First electromagnetic control valve; 18. Second electromagnetic control valve; 19. Power supply; 20. Control main board; 21. Audio receiver; 22. Sound controller; 23. Network connector; 24. Electromagnetic controller; 25. Data storage; 26. Wireless signal receiver; 27. Partition board; 28. Connecting rod; 29. First speaker; 30. Adjusting handle; 31. First gasket; 32. Fixed block; 33. Sealing ring; 34. Threaded connection port; 35. Buffer box; 36. Leg; 37. Sonar receiver; 38. Pressure sensor box; 39. Connecting hose; 40. Wiring port. Detailed implementation manner

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment

[0032] Please refer to Figures 1-5, A gas detection device, comprising a first protective shell 1 and a second protective shell 6. The left end and the right end of the first protective shell 1 are both connected to a connecting hose 39. And the left end and the right end of the connecting hose 39 are both provided with connectors 2. Inside each of the connectors 2, there is a fixing block 32. And the left end and the right end of the circumferential inner wall of each fixing block 32 and the circumferential outer wall of the connecting hose 39 are sleeved and connected. Sealing rings 33 are sleeved on the circumferential outer wall of the left end and the circumferential outer wall of the right end of the connecting hose 39. Each sealing ring 33 cooperates with each fixing block 32. Threaded connection ports 34 are sleeved on the circumferential inner wall of each of the connectors 2. A first chamber is opened inside the first protective shell 1. And a buffer box 35 is arranged on the inner bottom wall of the first protective shell 1 through a group of legs 36. Sonar receivers 37 are arranged on the left side wall and the right side wall of the buffer box 35. A pressure sensor box 38 is arranged on the inner top wall of the buffer box 35. The connecting hose 39 passes through the first protective shell 1 and extends into the interior of the first protective shell 1. And the connecting hose 39 is communicated with the buffer box 35. An electromagnetic control valve one 17 and an electromagnetic control valve two 18 are respectively arranged on the left side and the right side of the buffer box 35. And both the electromagnetic control valve one 17 and the electromagnetic control valve two 18 are communicated with the connecting hose 39. A connecting line 4 is connected between the left side of the top end of the first protective shell 1 and the left side of the bottom end of the second protective shell 6. And a group of protective rings 3 are sleeved on the circumferential outer wall of the connecting line 4. Each protective ring 3 is fixedly connected to the top end of the first protective shell 1 and the bottom end of the second protective shell 6. Inside the pressure sensor box 38, there is a pressure sensor and a trigger sounding sheet. The trigger sounding sheet is connected to the bottom of the pressure sensor box 38 body. The bottom of this body is a vibration pickup diaphragm. Sound holes facing the two sonar receivers 37 are respectively arranged on the side part of the pressure sensor box 38 body;

[0033] On the upper front region of the second protective shell 6, a display screen 9 is provided, and a control box 8 is provided in the lower region of the display screen 9. A plurality of control keys 7 are provided at the front end of the control box 8, and a label 5 is provided in the lower region of the control box 8. A second chamber is formed inside the second protective shell 6. An audio controller 22 is provided on the inner bottom wall of the second protective shell 6. An audio receiver 21 is provided at the right end of the audio controller 22. A control main board 20 is provided at the right end of the audio receiver 21. A power supply 19 is provided at the right end of the control main board 20. A wireless signal receiver 26 is provided at the top of the power supply 19. A data memory 25 is provided at the left end of the wireless signal receiver 26. An electromagnetic controller 24 is provided at the left end of the data memory 25. A network connector 23 is provided at the left end of the electromagnetic controller 24. A partition 27 is connected between the left side wall and the right side wall of the second protective shell 6. Link rods 28 are provided at the left side wall, the right side wall, the inner top wall of the protective shell and the top end of the partition 27, and one end of each link rod 28 is connected to a first speaker 29. A sound transmission hole 12 is formed at the rear end of the second protective shell 6. For this gas detection device, the threaded connection port 34 facilitates the connection of the device, which is convenient and simple, and at the same time reduces the probability of leakage. The device can be remotely monitored through the network connector 23, which is convenient for maintenance personnel to perform timely maintenance on the device. The pipeline can be timely closed through the cooperation between the first electromagnetic control valve 17 and the second electromagnetic control valve 18 to prevent excessive gas leakage from causing fire or explosion. The audio receiver 21 and the sonar receiver 37 are used to receive and observe the audio of gas leakage, and feedback the gas leakage in a timely manner to increase the accuracy of the alarm. The electromagnetic control valve is timely controlled through the cooperation between the electromagnetic controller 24 and the control main board 20 to reduce the gas leakage amount. Through the cooperation between the audio controller 22 and the first speaker 29, a timely sound alarm is made to remind personnel to react in a timely manner and prevent personal danger.

[0034] Specifically, sealing gaskets 31 are sleeved on the circumferential outer walls of the left end and the right end of the connecting hose 39, and each sealing gasket 31 is rotatably connected to the connector 2 to prevent gas leakage at the connecting hose 39 and the connector 2.

[0035] Specifically, adjusting handles 30 are sleeved on the circumferential outer walls of the connectors 2, which facilitates the connection of the connectors 2, reduces professional tooling, and lowers the installation cost.

[0036] Specifically, a square hole is formed in the lower region at the left end of the second protective shell 6, and a wiring port 40 is provided in the square hole to facilitate the connection of the external power supply 19 and reduce the occurrence of electric sparks caused by poor contact of the cable.

[0037] Specifically, support points two 14 and support points one 10 are respectively arranged at the four corner positions at the rear end of the first protective shell 1 and the four corner positions at the rear end of the second protective shell 6, so that the first protective shell 1 and the second protective shell 6 are isolated from the wall, delaying the oxidation time of the first protective shell 1 and the second protective shell 6 and prolonging the service life of the device.

[0038] Specifically, hanging holes one 11 are arranged at the four corner positions at the rear end of the second protective shell 6, and hanging pieces 15 are symmetrically arranged at the rear end of the first protective shell 1. Hanging holes two 16 are arranged on each hanging piece 15, which is convenient for fixing the device to the wall surface.

[0039] Specifically, a plurality of heat dissipation holes 13 are arranged in the lower area at the rear end of the second protective shell 6, which is convenient for heat dissipation inside the protective shell, preventing the internal heat from accumulating too high and causing the internal electrical components to age.

[0040] A detection method for a gas detection device as described above includes the following steps:

[0041] Step one: Fix the device to the wall surface through the hanging holes one 11 and the hanging holes two 16, connect the external power supply 19, connect through each connector 2 and the pipeline, and set the device through the control key 7 and the display screen 9;

[0042] Step two: Sense the air pressure value through the pressure sensor box 38. Under normal circumstances, when the pressure is stable, the device operates normally. When the pressure is unstable and exceeds the fluctuation threshold, the device gives a preset alarm. If the pressure value fluctuates slightly, the flow of the natural gas generates vibration on the pickup diaphragm of the pressure sensor box 38, and the pickup diaphragm causes the vibration of the trigger sounding sheet to generate sound, so that the vibration is amplified and the sound wave signal caused by the vibration is transmitted to the sonar receivers 37 on both sides through the two sound holes on the side of the pressure sensor box 38 body;

[0043] Step three: When a leakage occurs, after the signal received by the sonar receiver 37 exceeds the threshold, a warning is given, and the signal magnitudes of the signals of the two sonar receivers 37 are compared, and the side with the larger assistance is used as the leakage side. When a leakage occurs on the left side, the electromagnetic controller 24 controls the first electromagnetic control valve 17 to close. When a leakage occurs on the right side, the electromagnetic controller 24 controls the second electromagnetic control valve 18 to close, and remote alarm is carried out through the network connector 23 for timely emergency repair;

[0044] Therefore, in the present invention, there is no need for the pressure sensor to have high detection accuracy and detection sensitivity. The vibration caused by a small leakage signal can be amplified by the diaphragm and the trigger sounding sheet, so as to realize reliable organic integration detection by multiple means. While improving the detection reliability and sensitivity, there is no need to set high-precision detection sensors at the same time.

[0045] Step 4: Transmit signal data to the user through the wireless signal receiver 26, analyze the sound waves received by the sonar receiver 37 through the audio receiver 21, and transmit them to the control main board 20 for the next operation and control.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Detection method of a gas detection device Characterized in that The gas detection device includes a first protective shell and a second protective shell. The left end and the right end of the first protective shell are both connected with connecting hoses, and the left end and the right end of the connecting hoses are both provided with connectors. Inside each connector, there is a fixed block, and the inner circumferential wall of each fixed block and the outer circumferential wall of the connecting hose at the left end and the right end are sleeved and connected. Sealing rings are sleeved on the outer circumferential wall of the left end and the outer circumferential wall of the right end of the connecting hose. Each sealing ring cooperates with each fixed block. Threaded connection ports are sleeved on the inner circumferential wall of each connector. A first chamber is opened inside the first protective shell, and a buffer box is arranged on the inner bottom wall of the first protective shell through a group of legs. Sonar receivers are arranged on the left side wall and the right side wall of the buffer box, and a pressure sensor box is arranged on the inner top wall of the buffer box. The connecting hose passes through the first protective shell and extends into the interior of the first protective shell, and the connecting hose is communicated with the buffer box. An electromagnetic control valve one and an electromagnetic control valve two are respectively arranged on the left side and the right side of the buffer box, and both the electromagnetic control valve one and the electromagnetic control valve two are communicated with the connecting hose. A connecting line is connected between the left side of the top end of the first protective shell and the left side of the bottom end of the second protective shell, and a group of protective rings are sleeved on the outer circumferential wall of the connecting line. Each protective ring is fixedly connected to the top end of the first protective shell and the bottom end of the second protective shell. Inside the pressure sensor box, there is a pressure sensor and a trigger sounding sheet. The trigger sounding sheet is connected to the bottom of the pressure sensor box body, and the bottom of the pressure sensor box body is a pickup diaphragm. Sound holes facing the two sonar receivers are respectively arranged on the side part of the pressure sensor box body; In the upper part of the front end of the second protective shell, there is a display screen, and in the lower part of the display screen, there is a control box. A plurality of control keys are arranged on the front end of the control box, and a label is arranged in the lower part of the control box. A second chamber is opened inside the second protective shell. An audio controller is arranged on the inner bottom wall of the second protective shell. An audio receiver is arranged at the right end of the audio controller. A control main board is arranged at the right end of the audio receiver. A power supply is arranged at the right end of the control main board. A wireless signal receiver is arranged at the top end of the power supply. A data memory is arranged at the left end of the wireless signal receiver. An electromagnetic controller is arranged at the left end of the data memory. A network connector is arranged at the left end of the electromagnetic controller. A partition is connected between the left side wall and the right side wall of the protective shell. Connecting rods are arranged on the left side wall, the right side wall, the inner top wall of the protective shell and the top end of the partition, and a speaker one is connected to one end of each connecting rod. Sound transmission holes are opened at the rear end of the second protective shell; The detection method includes the following steps: Step 1: Fix the device on the wall through the first hanging hole and the second hanging hole, connect the external power supply, connect through each connector and pipeline, and set the device through the control keys and the display screen; Step 2: The air pressure value is sensed by the pressure sensor box. Under normal circumstances, when the pressure is stable, the device operates normally. When the pressure is unstable and exceeds the fluctuation threshold, the device gives a predetermined alarm. If the pressure value fluctuates slightly, the flow of natural gas causes the pick-up diaphragm of the pressure sensor box to vibrate. This pick-up diaphragm causes the triggering sound sheet to vibrate and generate sound, thereby amplifying the vibration and transmitting the sound wave signal caused by this vibration to the sonar receivers on both sides through the two sound holes on the side of the pressure sensor box body; Step 3: When a leakage occurs, after the signal received by the sonar receiver exceeds the threshold, a warning is given, and the signal magnitudes of the two sonar receivers are compared. The side with the larger amplitude is taken as the leakage side. When the left side leaks, the electromagnetic controller controls the first electromagnetic control valve to close. When the right side leaks, the electromagnetic controller controls the second electromagnetic control valve to close, and remote alarm is carried out through the network connector for timely emergency repair; Step 4: Signal data is transmitted to the user through the wireless signal receiver, and the sound wave received by the sonar receiver is analyzed by the audio receiver and transmitted to the control main board for the next step of operation.

2. The detection method according to claim 1, characterized in that, Sealing gaskets I are sleeved on the circumferential outer walls of the left end and the right end of the connecting hose, and each sealing gasket I is rotatably connected to the connector.

3. The detection method according to claim 2, characterized in that, Adjusting handles are sleeved on the circumferential outer walls of the connectors.

4. The detection method according to claim 3, characterized in that, A square hole is provided in the lower area at the left end of the second protective shell, and a wiring port is arranged in the square hole.

5. The detection method according to claim 4, characterized in that, Support points II and support points I are respectively arranged at the four corner positions at the rear end of the first protective shell and the four corner positions at the rear end of the second protective shell.

6. The detection method according to claim 5, characterized in that, Hanging holes I are arranged at the four corner positions at the rear end of the second protective shell, and hanging pieces are symmetrically arranged at the rear end of the first protective shell, and hanging holes II are arranged on each hanging piece.

7. The detection method according to claim 6, characterized in that, A plurality of heat dissipation holes are arranged in the lower area at the rear end of the second protective shell.

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