CN210606044U - Combustible gas detection alarm - Google Patents
Combustible gas detection alarm Download PDFInfo
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- CN210606044U CN210606044U CN201921762702.8U CN201921762702U CN210606044U CN 210606044 U CN210606044 U CN 210606044U CN 201921762702 U CN201921762702 U CN 201921762702U CN 210606044 U CN210606044 U CN 210606044U
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Abstract
The utility model discloses a combustible gas detection alarm, which comprises a shell; and a detection port arranged at the bottom of the shell; the combustible gas detection module is arranged on the inner side of the detection port; the combustible gas detection module is electrically connected to the controller, a downward wire inlet column is arranged on one side of the shell, and an upward alarm column is arranged on the other side of the shell; an acousto-optic alarm circuit is arranged on the inner side of the alarm column; the sound and light alarm circuit is electrically connected to the controller; a transparent sealing cover is arranged at the top of the alarm column; the front lower part of the wire inlet column is provided with a wiring groove; a sealing cover is fixed at the wiring groove through a bolt; the utility model discloses a combustible gas surveys alarm can trigger global monitoring through the point-to-point monitoring of local, through point-to-point monitoring time measuring, can directly produce alarm signal to control the whole alarm action.
Description
Technical Field
The utility model relates to a gas alarm, concretely relates to combustible gas surveys alarm belongs to gas alarm technical field.
Background
The combustible gas alarm is also called as a gas leakage detection alarm instrument; when combustible gas leaks in industrial environment and daily life environment and the combustible gas alarm detects that the concentration of the combustible gas reaches the alarm value set by the alarm, the combustible gas alarm can send out sound and light alarm signals to remind people of taking safety measures such as evacuation, forced air exhaust, equipment shutdown and the like; the gas alarm can be linked with related linkage equipment, such as leakage in factory production, storage and transportation, and can drive systems such as air exhaust, power supply cut-off, spraying and the like, so that explosion, fire and poisoning accidents are prevented, and safety production is guaranteed; the fuel is often used in places where flammable gas is used or generated, such as chemical plants, petroleum, gas stations, steel plants and the like; in the prior art, the combustible gas detection alarm consists of a detector and an alarm control host, an alarm signal needs to be sent to the control host, the combustible gas detection alarm cannot give an alarm by itself, and meanwhile, the detection reaction is not sensitive enough.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a combustible gas surveys alarm can realize point-to-point monitoring in scene and global monitoring.
The utility model discloses a combustible gas surveys alarm, set up fixed point monitoring sensor module and combustible gas detection module and detect, when the point type detector of fixed point monitoring sensor module and/or pressure differential flow switch do not detect threshold value concentration and/or pipeline flow, combustible gas detection module is in standby state, when point type detector and/or pressure differential flow switch produce threshold value alarm signal or flow threshold value signal, send trigger signal to the controller, the controller gives combustible gas detection module signal, combustible gas detection module begins to carry out active detection, when detected data reaches the threshold value, the controller gives control line signal earlier, control emergency terminal responds; then the controller gives a signal to the sound-light alarm circuit to start sound-light alarm, when the detection data does not reach the threshold value, the combustible gas detection module continuously detects the signal, and the combustible gas detection module stops detecting the signal until the level of the signal sent by the signal wire is converted; when the point type detector is adopted for detection, the point type detector is installed in two types, one type is provided with low threshold value alarm, the other type is provided with high threshold value alarm, when the level of a signal interface of the low threshold value alarm is turned over, the combustible gas detection module is triggered for detection, when the level of the signal interface of the high threshold value alarm is turned over, the controller is triggered to carry out alarm action, the controller directly sends signals to the sound-light alarm circuit and the control line, thereby controlling alarm, when the point type detector is adopted for detection, after the point type detector finishes conditioning output, the two comparators are used for comparison, the two comparators are provided with a first alarm threshold value and a second alarm threshold value, the two outputs of the comparators are respectively sent to two signal interfaces of the controller, when the first alarm threshold value is reached, triggering the combustible gas detection module to detect, when the second alarm threshold value reaches, triggering the controller to alarm, its concrete structure is as follows: comprises a shell; and a detection port arranged at the bottom of the shell; the combustible gas detection module is arranged on the inner side of the detection port; the combustible gas detection module is electrically connected to the controller, the combustible gas detection module adopts the existing catalytic combustion type sensor and a module consisting of the existing catalytic combustion type sensor and a later conditioning circuit, the catalytic combustion type sensor has good data acquisition output signal line shape and reliable index, and has no cross interference with other non-combustible gases; the method adopts a Wheatstone bridge principle, the sensing resistor and combustible gas in a detection environment generate flameless combustion, so that the resistance value of the temperature sensing resistor is changed, the bridge balance is broken, a stable current signal is output, the current signal is amplified and conditioned by a later circuit, the analog quantity of the circuit signal is converted into digital quantity by an AD conversion circuit and then is judged by a controller, and when the analog quantity exceeds a preset threshold value, the controller can perform alarm processing; the whole combustible gas detection module can adopt the existing integrated board, and the output of the integrated board is a digital signal; a downward wire inlet column is arranged on one side of the shell, and an upward alarm column is arranged on the other side of the shell; an acousto-optic alarm circuit is arranged on the inner side of the alarm column; the sound and light alarm circuit is electrically connected to the controller; a transparent sealing cover is arranged at the top of the alarm column; the transparent sealing cover can disperse optical signals, the acousto-optic alarm circuit drives the LED to carry out optical alarm by the LED driving circuit, and drives the buzzer to carry out sound alarm by the buzzer driving circuit, and the acousto-optic alarm circuit can directly control low-level end signals of the acousto-optic alarm circuit by the controller or control the low-level end signals by the relay so as to complete alarm operation; the front lower part of the wire inlet column is provided with a wiring groove; a sealing cover is fixed at the wiring groove through a bolt; a power supply wire slot, a signal wire slot and a control wire slot are respectively arranged in the wiring slots; the inner sides of the power line slot, the signal line slot and the control line slot are respectively provided with a power line, a signal line and a control line which are electrically connected with the controller; the signal line is electrically connected to a fixed-point monitoring sensor module arranged close to the air source; the control line is electrically connected to an emergency terminal; the controller is composed of a single chip microcomputer minimum system, an I/O port of the controller detects whether each interface corresponding to a signal line has a low level signal, and when the signal is detected, the controller can perform trigger detection or trigger alarm; the controller detects a super-threshold signal or a low level signal sent by an external signal line, and gives a control line and an I/O interface signal corresponding to the acousto-optic alarm circuit, so that the alarm operation is performed.
Furthermore, the control line comprises one or more of an air exhaust device control line interface, an air supply pipeline closing valve control line interface and an alarm host control line interface, and can automatically close, exhaust and report to the host and the like the air supply pipeline.
Further, fixed point monitoring sensor module is including setting up in the air supply around a plurality of point type detectors and setting up at least one in the pressure differential flow switch on the admission line, and the point type detector carries out low concentration and triggers combustible gas detection module and detects to reach the direct alarming function of high concentration trigger control ware.
Furthermore, a visual window is arranged on the front face of the shell; and a power indicator light, an alarm indicator light and a fault indicator light which are electrically connected with the controller are arranged on the inner side of the visual window.
Compared with the prior art, the utility model discloses a combustible gas surveys alarm can trigger global monitoring through the point-to-point monitoring of local, through point-to-point monitoring time measurement, can directly produce alarm signal to control the action of whole alarm.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic block diagram of the internal circuit of the present invention.
Detailed Description
Example 1:
as shown in fig. 1 and 2, the combustible gas detection alarm is provided with a fixed-point monitoring sensor module and a combustible gas detection module for detection, when a point detector and/or a differential pressure flow switch of the fixed-point monitoring sensor module do not detect threshold concentration and/or pipeline flow, the combustible gas detection module is in a standby state, when the point detector and/or the differential pressure flow switch generate a threshold alarm signal or a flow threshold signal, a trigger signal is sent to a controller, the controller sends a signal to the combustible gas detection module, the combustible gas detection module starts active detection, and when detection data reach a threshold value, the controller sends a control line signal first to control an emergency terminal to respond; then the controller gives a signal to the sound-light alarm circuit to start sound-light alarm, when the detection data does not reach the threshold value, the combustible gas detection module continuously detects the signal, and the combustible gas detection module stops detecting the signal until the level of the signal sent by the signal wire is converted; when the point type detector is adopted for detection, the point type detector is installed in two types, one type is provided with low threshold value alarm, the other type is provided with high threshold value alarm, when the level of a signal interface of the low threshold value alarm is turned over, the combustible gas detection module is triggered for detection, when the level of the signal interface of the high threshold value alarm is turned over, the controller is triggered to carry out alarm action, the controller directly sends signals to the sound-light alarm circuit and the control line, thereby controlling alarm, when the point type detector is adopted for detection, after the point type detector finishes conditioning output, the two comparators are used for comparison, the two comparators are provided with a first alarm threshold value and a second alarm threshold value, the two outputs of the comparators are respectively sent to two signal interfaces of the controller, when the first alarm threshold value is reached, triggering the combustible gas detection module to detect, when the second alarm threshold value reaches, triggering the controller to alarm, its concrete structure is as follows: comprises a shell 1; and a detection port 2 arranged at the bottom of the shell; and a combustible gas detection module 3 arranged at the inner side of the detection port; the combustible gas detection module is electrically connected to the controller 4, the combustible gas detection module adopts the existing catalytic combustion type sensor and a module consisting of the existing catalytic combustion type sensor and a later-stage conditioning circuit, and the catalytic combustion type sensor has good data acquisition output signal line shape, reliable index and no cross interference with other non-combustible gases; the method adopts a Wheatstone bridge principle, the sensing resistor and combustible gas in a detection environment generate flameless combustion, so that the resistance value of the temperature sensing resistor is changed, the bridge balance is broken, a stable current signal is output, the current signal is amplified and conditioned by a later circuit, the analog quantity of the circuit signal is converted into digital quantity by an AD conversion circuit and then is judged by a controller, and when the analog quantity exceeds a preset threshold value, the controller can perform alarm processing; the whole combustible gas detection module can adopt the existing integrated board, and the output of the integrated board is a digital signal; a downward wire inlet column 5 is arranged on one side of the shell 1, and an upward alarm column 6 is arranged on the other side of the shell 1; an acousto-optic alarm circuit 7 is arranged on the inner side of the alarm column 6; the sound and light alarm circuit 7 is electrically connected to the controller 4; a transparent sealing cover 8 is arranged at the top of the alarm column 6; the transparent sealing cover can disperse optical signals, the acousto-optic alarm circuit drives the LED to carry out optical alarm by the LED driving circuit, and drives the buzzer to carry out sound alarm by the buzzer driving circuit, and the acousto-optic alarm circuit can directly control low-level end signals of the acousto-optic alarm circuit by the controller or control the low-level end signals by the relay so as to complete alarm operation; the front lower part of the wire inlet post 5 is provided with a wiring groove; a sealing cover 15 is fixed at the wiring groove through a bolt; a power supply wire slot 9, a signal wire slot 10 and a control wire slot 11 are respectively arranged in the wiring slots; the inner sides of the power line slot 9, the signal line slot 10 and the control line slot 11 are respectively provided with a power line 12, a signal line 13 and a control line 14 which are electrically connected with a controller; the signal wire 14 is electrically connected to a fixed-point monitoring sensor module 16 arranged close to the air source; the control line 14 is electrically connected to an emergency terminal 17; the controller is composed of a single chip microcomputer minimum system, an I/O port of the controller detects whether each interface corresponding to a signal line has a low level signal, and when the signal is detected, the controller can perform trigger detection or trigger alarm; the controller detects a super-threshold signal or a low level signal sent by an external signal line, and gives a control line and an I/O interface signal corresponding to the acousto-optic alarm circuit, so that the alarm operation is performed.
The control line 14 comprises one or more of an air exhaust device control line interface, an air supply pipeline closing valve control line interface and an alarm host control line interface, and can automatically close an air inlet pipeline, exhaust air, report to a host and the like; the fixed-point monitoring sensor module 16 comprises a plurality of point-type detectors arranged around an air source and at least one of pressure difference flow switches arranged on an air inlet pipeline, the point-type detectors perform low-concentration triggering combustible gas detection module detection, and a high-concentration triggering controller directly alarms.
In another embodiment, a visible window is arranged on the front surface of the shell 1; and a power indicator light, an alarm indicator light and a fault indicator light which are electrically connected with the controller are arranged on the inner side of the visual window.
The above-mentioned embodiment is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the claims of the present invention.
Claims (4)
1. A combustible gas detection alarm comprises a shell; and a detection port arranged at the bottom of the shell; the combustible gas detection module is arranged on the inner side of the detection port; combustible gas detects module electricity and connects to controller, its characterized in that: a downward wire inlet column is arranged on one side of the shell, and an upward alarm column is arranged on the other side of the shell; an acousto-optic alarm circuit is arranged on the inner side of the alarm column; the sound and light alarm circuit is electrically connected to the controller; a transparent sealing cover is arranged at the top of the alarm column; the front lower part of the wire inlet column is provided with a wiring groove; a sealing cover is fixed at the wiring groove through a bolt; a power supply wire slot, a signal wire slot and a control wire slot are respectively arranged in the wiring slots; the inner sides of the power line slot, the signal line slot and the control line slot are respectively provided with a power line, a signal line and a control line which are electrically connected with the controller; the signal line is electrically connected to a fixed-point monitoring sensor module arranged close to the air source; the control line is electrically connected to an emergency terminal.
2. The combustible gas detection alarm of claim 1, wherein: the control line comprises one or more of an exhaust equipment control line interface, an air supply pipeline closing valve control line interface and an alarm host control line interface.
3. The combustible gas detection alarm of claim 1, wherein: the fixed-point monitoring sensor module comprises a plurality of point-type detectors arranged around an air source and at least one of differential pressure flow switches arranged on an air inlet pipeline.
4. The combustible gas detection alarm of claim 1, wherein: the front surface of the shell is provided with a visual window; and a power indicator light, an alarm indicator light and a fault indicator light which are electrically connected with the controller are arranged on the inner side of the visual window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762702.8U CN210606044U (en) | 2019-10-21 | 2019-10-21 | Combustible gas detection alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762702.8U CN210606044U (en) | 2019-10-21 | 2019-10-21 | Combustible gas detection alarm |
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| CN210606044U true CN210606044U (en) | 2020-05-22 |
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| CN201921762702.8U Active CN210606044U (en) | 2019-10-21 | 2019-10-21 | Combustible gas detection alarm |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325037A (en) * | 2021-07-09 | 2021-08-31 | 深圳市焰井科技有限公司 | Combustible gas detector convenient to adjust and method |
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2019
- 2019-10-21 CN CN201921762702.8U patent/CN210606044U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325037A (en) * | 2021-07-09 | 2021-08-31 | 深圳市焰井科技有限公司 | Combustible gas detector convenient to adjust and method |
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