CN216619379U - Automatic gas fuel leakage detection system - Google Patents
Automatic gas fuel leakage detection system Download PDFInfo
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- CN216619379U CN216619379U CN202122690924.7U CN202122690924U CN216619379U CN 216619379 U CN216619379 U CN 216619379U CN 202122690924 U CN202122690924 U CN 202122690924U CN 216619379 U CN216619379 U CN 216619379U
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Abstract
The application relates to a gas fuel leakage automatic detection system, which comprises a gas supply detection pipeline; the on-off valve group unit is configured to be communicated with the gas supply detection pipeline and used for switching on and off of gas fuel supply in the gas supply detection pipeline; a pressure detection unit configured to be disposed on the gas supply detection line for detecting a pressure of the gas fuel in the gas supply detection circuit to output a pressure detection signal; the control unit comprises a controller and a comparator, the comparator is in signal connection with the pressure detection unit, and the comparator receives the pressure detection signal and compares the pressure detection signal with a preset reference signal to output a comparison result signal; the signal input end of the controller is in signal connection with the comparator, the signal output end of the controller is in control connection with the on-off valve unit, and the controller receives a comparison result signal to switch the on-off of the on-off valve unit. This application has the effect of being convenient for carry out gas leakage detection to gas supply pipeline.
Description
Technical Field
The application relates to the technical field of gas leakage detection, in particular to an automatic gas fuel leakage detection system.
Background
With the development of economy, the utilization of various energy sources is more and more diversified, and the application scenes of various gas fuels are more and more. In industrial production, leakage of gaseous fuel is an important risk that jeopardizes safe production. Most of gas fuels are toxic and harmful gases, and after leakage, the gas fuels reach a certain concentration and encounter a fire source, the gas fuels can be combusted or exploded, so that serious casualties and huge national economic losses are caused.
In the related art, in the situation of using gas fuel, a combustible gas detection device is generally adopted to monitor the concentration of combustible gas in the air around a gas supply pipeline in real time, and an alarm is given out after a certain concentration is reached to remind an operator or an operation system to close the gas supply pipeline, so that accidents are avoided. However, the gas leakage is monitored by using the combustible gas detection device, which belongs to post-event monitoring, when the gas leakage is found, a large amount of combustible gas is always leaked, which is easy to cause harm, so that the gas leakage detection is urgently needed to be performed on the gas supply pipeline before the gas supply pipeline is used.
SUMMERY OF THE UTILITY MODEL
In order to facilitate gas leakage detection of a gas supply pipeline, the application provides an automatic gas fuel leakage detection system.
The application provides a gaseous fuel leakage automatic check out system adopts following technical scheme:
an automatic detection system for gas fuel leakage comprises a gas supply detection pipeline;
the on-off valve group unit is configured to be communicated with the gas supply detection pipeline and used for switching on and off of gas fuel supply in the gas supply detection pipeline;
a pressure detection unit configured to be disposed on the gas supply detection line for detecting a pressure of the gas fuel within the gas supply detection circuit to output a pressure detection signal;
the control unit comprises a controller and a comparator, the comparator is in signal connection with the pressure detection unit, and the comparator receives the pressure detection signal and compares the pressure detection signal with a preset reference signal to output a comparison result signal; the signal input end of the controller is in signal connection with the output end of the comparator, the signal output end of the controller is in control connection with the on-off valve unit, and the controller receives the comparison result signal to switch the on-off of the on-off valve unit.
Through adopting above-mentioned technical scheme, in detecting the operation to gas supply detection pipeline leak detection, detect the pressure of gaseous fuel in the gaseous supply detection return circuit through the pressure detection unit, and compare with the predetermined standard value through the comparator, if it has gaseous leakage to detect, the controller control sets up the on-off valves group unit closure on gaseous supply detection pipeline, thereby the supply of gaseous fuel in the gaseous supply detection pipeline of disconnection, gaseous leakage detects the mode that adopts automated inspection, the convenience of detecting gaseous leakage of gas supply detection pipeline has been improved.
Preferably, the gas supply pipeline comprises a first detection circuit and a second detection circuit communicated with the first detection circuit;
the on-off valve unit comprises a first stop valve, a second stop valve, a first control valve and a second control valve, the first stop valve, the second stop valve and the first control valve are sequentially arranged on the first detection circuit along the gas feeding direction, and the second control valve is arranged on the second detection circuit.
Through adopting above-mentioned technical scheme, set up first stop valve on first detection return circuit, the second stop valve, first control valve and second control valve, set up the second control valve on the second detection return circuit, be convenient for control the circulation of gaseous fuel in first detection return circuit and the second detection return circuit, and first stop valve, the second stop valve, first control valve and second control valve divide first detection return circuit into the multistage, through the different valves of break-make, can be to the gas leakage detection of each section of first detection return circuit, thereby improve the accuracy of detection.
Preferably, the first stop valve and the second stop valve are both normally closed stop valves, and both the first stop valve and the second stop valve are controlled by the controller.
Through adopting above-mentioned technical scheme, first stop valve and second stop valve of controller control are convenient for to first stop valve and second stop valve automatic control, have improved the convenience to first stop valve and second stop valve control.
Preferably, a first pressure sensor is arranged between the air inlet end of the first detection circuit and the first stop valve, a second pressure sensor is arranged between the first stop valve and the second stop valve, and the output ends of the first pressure sensor and the second pressure sensor are in signal connection with the comparator.
By adopting the technical scheme, when gas leakage of a pipeline between the gas inlet end of the first detection loop and the first stop valve is required to be detected, because the first stop valve is a normally closed stop valve, after gas fuel is conveyed to the first stop valve, the first pressure sensor detects the pressure value of the gas fuel and inputs a detected pressure detection signal to the comparator, the comparator compares the pressure detection signal with a preset reference signal, and if the pressure detection signal is different from the reference signal, the gas leakage of the pipeline between the gas inlet end of the first detection loop and the first stop valve is represented; similarly, when the pipeline between the inlet end of the first detection loop and the first stop valve detects that no gas leaks, the first stop valve is opened, and after the gas fuel is conveyed to the second stop valve, the comparator compares the pressure detection signal output by the second pressure sensor with the preset reference signal, if the pressure detection signal is different from the reference signal, the pipeline between the inlet end of the first detection loop and the second stop valve is represented to have gas leakage, and meanwhile, whether the pipeline has gas leakage can be judged by comparing whether the pressure values detected by the first pressure sensor and the second pressure sensor are consistent, so that whether the pipeline has gas leakage or not can be detected between the input end of the first detection loop and the second stop valve.
Preferably, a pipeline between the first stop valve and the second stop valve is communicated with an exhaust circuit, and the exhaust circuit is communicated with an exhaust valve.
Through adopting above-mentioned technical scheme, after the pipeline gas leakage detection between the input of first detection return circuit and the second stop valve is accomplished, open the exhaust pipe through discharge valve, be convenient for empty the gaseous fuel that uses in detecting.
Preferably, a third pressure sensor is arranged on a pipeline of the first control valve and the second stop valve, a fourth pressure sensor is arranged between the first control valve and the gas outlet end of the first detection loop, a fifth pressure sensor is arranged between the second control valve and the gas outlet end of the second detection loop, and output ends of the third pressure sensor, the fourth pressure sensor and the fifth pressure sensor are in signal connection with the comparator.
Through adopting above-mentioned technical scheme, detect the pressure of second detection return circuit and first detection return circuit interior gaseous fuel through third pressure sensor, fourth pressure sensor and fifth pressure sensor, be convenient for detect whether the second detection return circuit has gas leakage and whether first detection return circuit has gas leakage.
Preferably, the controller is in control connection with both the first control valve and the second control valve, and the controller is used for switching the opening degrees of the first control valve and the second control valve.
Through adopting above-mentioned technical scheme, adopt the controller to control the aperture of first control valve and second control valve, be convenient for control gas provides the feed rate of fuel to the combustion chamber.
Preferably, the gas fuel leakage automatic detection system further comprises an alarm unit, the alarm unit comprises a light emitting diode and a buzzer, the anode of the light emitting diode is electrically connected with the output end of the comparator, the cathode of the light emitting diode is electrically connected with the input end of the buzzer, and the output end of the buzzer is grounded.
Through adopting above-mentioned technical scheme, alarm unit reports to the police to gas leakage, is convenient for remind operating personnel.
In summary, the present application includes at least one of the following beneficial technical effects:
in the leakage detection operation of the gas supply detection pipeline, the pressure of gas fuel in the gas supply detection loop is detected through the pressure detection unit, the pressure is compared with a preset standard value through the comparator, if gas leakage is detected, the controller controls the on-off valve group unit arranged on the gas supply detection pipeline to be closed, so that the supply of the gas fuel in the gas supply detection pipeline is cut off, the gas leakage detection adopts an automatic detection mode, and the convenience of the gas leakage detection of the gas supply detection pipeline is improved;
in the detection operation, if it is detected that the gas supply pipeline has gas fuel leakage, the alarm unit sends an alarm signal to an operator, so that the operator is reminded of the occurrence of the gas leakage condition, and the operator is facilitated to process the gas leakage.
Drawings
FIG. 1 is a schematic block diagram of a gaseous fuel leak detection system embodying the subject application embodiments generally;
FIG. 2 is a schematic diagram of a gaseous fuel leak detection system embodying aspects of the present application;
fig. 3 is a schematic diagram of a control unit controlling an on-off valve group unit according to an embodiment of the present application;
fig. 4 is a circuit diagram mainly embodying an alarm unit in the embodiment of the present application.
Reference numerals: 1. a gas supply detection line; 11. a first detection loop; 12. a second detection loop; 2. an on-off valve group unit; 21. a first shut-off valve; 22. a second stop valve; 23. a first control valve; 24. a second control valve; 3. a pressure detection unit; 31. a first pressure sensor; 32. a second pressure sensor; 33. a third pressure sensor; 34. a fourth pressure sensor; 35. a fifth pressure sensor; 4. a control unit; 41. a controller; 42. a comparator; 5. an exhaust circuit; 51. an exhaust valve; 6. an alarm unit; 61. a light emitting diode; 62. a buzzer.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a gas fuel leakage automatic detection system.
Referring to fig. 1, the gas fuel leakage automatic detection system includes a gas supply detection line 1, an on-off valve block unit 2 and a pressure detection unit 3 provided on the gas supply detection line 1, and a control unit 4. The on-off valve group unit 2 is used for switching on and off the gas fuel supply in the gas supply detection pipeline 1, and the pressure detection unit 3 is used for detecting the pressure of the gas fuel in the gas supply detection loop and outputting a pressure detection signal. The input end of the control unit 4 is in signal connection with the output end of the pressure detection unit 3, the output end of the control unit 4 is in control connection with the on-off valve group unit 2, and the control unit 4 receives the pressure detection signal and controls the on-off valve unit to be opened and closed.
Referring to fig. 2, the gas supply detection circuit includes a first detection circuit 11 and a second detection circuit 12, the second detection circuit 12 communicates with the first detection circuit 11, and the on-off valve unit includes a first off valve 21, a second off valve 22, a first control valve 23, and a second control valve 24. The output end of the first detection circuit 11 and the output end of the second detection circuit 12 are communicated with the combustion chamber, a first stop valve 21, a second stop valve 22 and a first control valve 23 are sequentially installed on the first detection circuit 11 along the gas feeding direction and divide the first detection circuit 11 into a plurality of sections, and a second control valve 24 is installed on the second detection circuit 12.
Wherein, the first stop valve 21 and the second stop valve 22 are both normally closed stop valves. The exhaust circuit 5 is also communicated with the pipeline between the first stop valve 21 and the second stop valve 22, and the exhaust valve 51 is communicated with the exhaust circuit 5. In the initial state, the first stop valve 21, the second stop valve 22, the first control valve 23, the second control valve 24, and the exhaust valve 51 are all closed.
A first pressure sensor 31 is installed between the air inlet end of the first detection circuit 11 and the first stop valve 21, a second pressure sensor 32 is installed between the first stop valve 21 and the second stop valve 22, a third pressure sensor 33 is installed between the second stop valve 22 and the first control valve 23, a fourth pressure sensor 34 is installed between the first control valve 23 and the air outlet end of the first detection circuit 11, and a fifth pressure sensor 35 is installed between the second control valve 24 and the air outlet end of the second detection circuit 12.
Referring to fig. 2 and 3, the control unit 4 includes a controller 41 and a comparator 42, and the controller 41 may adopt a PLC, a single chip microcomputer, or an FPGA control module. The first pressure sensor 31, the second pressure sensor 32, the third pressure sensor 33, the fourth pressure sensor 34, and the fifth pressure sensor 35 are all signal-connected to a non-inverting input terminal of the comparator 42, and transmit a detected pressure detection signal to the non-inverting input terminal of the comparator 42, wherein the pressure detection signal is a voltage signal. It should be noted that the strength of the pressure detection signals output by the first pressure sensor 31, the second pressure sensor 32, the third pressure sensor 33, the fourth pressure sensor 34, and the fifth pressure sensor 35 in the embodiment of the present application increases as the gas pressure in the gas supply detection line 1 decreases.
A reference voltage signal Vref is signal-connected to a non-inverting input terminal of the comparator 42, wherein the reference voltage signal Vref represents a normal voltage signal when no gas leakage occurs, and an output terminal of the comparator 42 is signal-connected to an input terminal of the controller 41 to output a comparison result signal to the controller 41. The controller 41 is in control connection with the first stop valve 21, the second stop valve 22, the first control valve 23, the second control valve 24 and the exhaust valve 51.
Referring to fig. 4, the output end of the comparator 42 is connected with an alarm unit 6. The alarm unit 6 comprises a light emitting diode 61 and a buzzer 62, wherein the anode of the light emitting diode 61 is electrically connected with the output end of the comparator 42, the cathode of the light emitting diode 61 is electrically connected with the input end of the buzzer 62, and the output end of the buzzer 62 is grounded.
Specifically, in the gas leakage detection, the first detection circuit 11 needs to be detected segment by segment, and when the gas leakage detection of the pipeline between the gas inlet end of the first detection circuit 11 and the first cut-off valve 21 needs to be performed, after the gas fuel is delivered to the first cut-off valve 21, the first pressure sensor 31 detects the gas pressure in the pipeline between the gas inlet end of the first detection circuit 11 and the first cut-off valve 21 and outputs a pressure detection signal.
If the pressure detection signal is consistent with the reference voltage signal Vref, it indicates that no leakage occurs in the pipeline between the air inlet end of the first detection circuit 11 and the first stop valve 21; if the pressure detection signal is greater than the reference voltage signal Vref, that is, the gas pressure in the pipeline between the inlet end of the first detection loop 11 and the first cut-off valve 21 decreases, the output end of the comparator 42 outputs a high level signal, so that the alarm unit 6 is powered on, the light emitting diode 61 emits light, and the buzzer 62 gives an alarm, which represents that gas leakage occurs in the pipeline between the inlet end of the first detection loop 11 and the first cut-off valve 21, and is convenient for performing gas leakage reminding on an operator.
When it is detected that no gas leakage occurs in the line between the intake end of the first detection circuit 11 and the first cut-off valve 21, the controller 41 controls the first cut-off valve 21 to be opened and controls the second cut-off valve 22 and the exhaust valve 51 to be kept closed. When the gaseous fuel is supplied to the second stop valve 22, the pressure of the gaseous fuel in the pipe between the first stop valve 21 and the second stop valve 22 is detected by the second pressure sensor 32. Similarly, if there is gas leakage, the light emitting diode 61 emits light and the buzzer 62 gives an alarm.
When it is detected that no gas leakage has occurred in the line between the first cut-off valve 21 and the second cut-off valve 22, the controller 41 controls the second cut-off valve 22 to open and the first control valve 23 to close, and after the gas fuel is supplied to the first control valve 23, the pressure of the gas fuel in the line between the second cut-off valve 22 and the first control valve 23 is detected by the third pressure sensor 33. Similarly, if there is gas leakage, the light emitting diode 61 emits light and the buzzer 62 gives an alarm. If no gas leakage occurs, the controller 41 controls the first control valve 23 to open, the gas fuel is delivered to the combustion chamber through the gas outlet end of the first detection loop 11, the fourth pressure sensor 34 detects the gas fuel pressure in the pipeline between the first control valve 23 and the gas outlet end of the first detection loop 11, and if gas leakage occurs, the light emitting diode 61 emits light and the buzzer 62 gives an alarm. If there is no gas leak, the controller 41 opens the purge valve 51 to purge the gaseous fuel used in the test.
Since the second detection circuit 12 is connected to the pipe between the second stop valve 22 and the first control valve 23, when detecting whether or not the gas in the second detection circuit 12 leaks, the controller 41 controls the first stop valve 21, the second stop valve 22, and the second control valve 24 to open, controls the exhaust valve 51 and the first control valve 23 to close, detects the gas fuel pressure in the second detection circuit 12 by the fifth pressure sensor 35, and if there is a gas leak, the light emitting diode 61 emits light and the buzzer 62 gives an alarm. The first control valve 23 and the second control valve 24 are both controlled by the controller 41, and the controller 41 switches the opening degrees of the first control valve 23 and the second control valve 24 to adjust the flow rate of the gaseous fuel delivered to the combustion chamber.
The implementation principle of the embodiment of the application is as follows: in the detection operation of detecting whether the gas fuel in the first detection circuit 11 and the second detection circuit 12 leaks, the controller 41 switches the opening and closing states of the first stop valve 21, the second stop valve 22, the first control valve 23, the second control valve 24 and the exhaust valve 51, the first pressure sensor 31, the second pressure sensor 32, the third pressure sensor 33, the fourth pressure sensor 34 and the fifth pressure sensor 35 are used for detecting the pressure of the gas fuel, the comparator 42 is used for comparing the pressure detection signal with the reference signal Vref, if the gas leakage occurs, the alarm unit 6 gives an alarm, the whole test system adopts an automatic control mode, and the detection operation of the gas leakage is greatly facilitated.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. An automatic gas fuel leak detection system, comprising:
a gas supply detection line (1);
an on-off valve group unit (2) which is configured to be communicated with the gas supply detection pipeline (1) and is used for switching on and off of gas fuel supply in the gas supply detection pipeline (1);
a pressure detection unit (3) configured to be disposed on the gas supply detection line (1) for detecting a pressure of the gas fuel within the gas supply detection circuit to output a pressure detection signal;
and a control unit (4) comprising a controller (41) and a comparator (42), wherein the comparator (42) is in signal connection with the pressure detection unit (3), and the comparator (42) receives the pressure detection signal and compares the pressure detection signal with a preset reference signal to output a comparison result signal; the signal input end of the controller (41) is in signal connection with the output end of the comparator (42), the signal output end of the controller (41) is in control connection with the on-off valve unit, and the controller (41) receives the comparison result signal to switch the on-off valve unit to be opened and closed.
2. An automatic gas fuel leak detection system according to claim 1, characterized in that: the gas supply pipeline comprises a first detection circuit (11) and a second detection circuit (12) communicated with the first detection circuit (11);
the on-off valve unit comprises a first stop valve (21), a second stop valve (22), a first control valve (23) and a second control valve (24), wherein the first stop valve (21), the second stop valve (22) and the first control valve (23) are sequentially arranged on the first detection loop (11) along the gas feeding direction, and the second control valve (24) is arranged on the second detection loop (12).
3. An automatic gas fuel leak detection system according to claim 2, characterized in that: the first stop valve (21) and the second stop valve (22) are both normally closed stop valves, and the first stop valve (21) and the second stop valve (22) are both controlled by the controller (41).
4. An automatic gas fuel leak detection system according to claim 3, characterized in that: a first pressure sensor (31) is arranged between the air inlet end of the first detection circuit (11) and the first stop valve (21), a second pressure sensor (32) is arranged between the first stop valve (21) and the second stop valve (22), and the output ends of the first pressure sensor (31) and the second pressure sensor (32) are in signal connection with the comparator (42).
5. An automatic gas fuel leak detection system according to claim 4, characterized in that: an exhaust loop (5) is communicated with a pipeline between the first stop valve (21) and the second stop valve (22), and an exhaust valve (51) is communicated with the exhaust loop (5).
6. An automatic gas fuel leak detection system according to claim 4, characterized in that: be provided with third pressure sensor (33) on the pipeline of first control valve (23) and second stop valve (22), be provided with fourth pressure sensor (34) between the end of giving vent to anger of first control valve (23) and first detection return circuit (11), be provided with fifth pressure sensor (35) between the gas outlet of second control valve (24) and second detection return circuit (12), the output of third pressure sensor (33), fourth pressure sensor (34) and fifth pressure sensor (35) all with comparator (42) signal connection.
7. An automatic gas fuel leak detection system according to claim 6, characterized in that: the controller (41) is in control connection with the first control valve (23) and the second control valve (24), and the controller (41) is used for switching the opening degrees of the first control valve (23) and the second control valve (24).
8. An automatic gas fuel leak detection system according to claim 1, characterized in that: still include alarm unit (6), alarm unit (6) include emitting diode (61) and bee calling organ (62), emitting diode (61) anodal is connected with the output electricity of comparator (42), emitting diode (61)'s negative pole is connected with bee calling organ (62)'s input electricity, bee calling organ (62)'s output ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690924.7U CN216619379U (en) | 2021-11-04 | 2021-11-04 | Automatic gas fuel leakage detection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122690924.7U CN216619379U (en) | 2021-11-04 | 2021-11-04 | Automatic gas fuel leakage detection system |
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| CN216619379U true CN216619379U (en) | 2022-05-27 |
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| CN202122690924.7U Active CN216619379U (en) | 2021-11-04 | 2021-11-04 | Automatic gas fuel leakage detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014651A (en) * | 2022-08-04 | 2022-09-06 | 西安四腾环境科技有限公司 | Online detection device for leakage of air exhaust filtering unit in P3-level biosafety experiment |
-
2021
- 2021-11-04 CN CN202122690924.7U patent/CN216619379U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115014651A (en) * | 2022-08-04 | 2022-09-06 | 西安四腾环境科技有限公司 | Online detection device for leakage of air exhaust filtering unit in P3-level biosafety experiment |
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Effective date of registration: 20221010 Address after: 201800 The first and third floors of Building 6, No. 1180, Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee after: SHANGHAI HELAN TOUPING POWER TECHNOLOGY CO.,LTD. Address before: Room j1852, building 4, zone B, No. 925, Yecheng Road, Jiading Industrial Zone, Jiading District, Shanghai 201800 Patentee before: Shanghai Jingran power technology partnership (L.P.) |
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