CN210134975U - While-drilling gas alarm system - Google Patents
While-drilling gas alarm system Download PDFInfo
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- CN210134975U CN210134975U CN201920638038.XU CN201920638038U CN210134975U CN 210134975 U CN210134975 U CN 210134975U CN 201920638038 U CN201920638038 U CN 201920638038U CN 210134975 U CN210134975 U CN 210134975U
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Abstract
The utility model belongs to the field of coal mines, and discloses a gas alarm system while drilling, which comprises a first switch type gas sensor, a second switch type gas sensor, a gas control safety grid, a gas control relay, an alarm control relay and an alarm circuit, wherein the output ends of the first switch type gas sensor and the second switch type gas sensor are respectively connected with the first input end and the second input end of the gas control safety grid, the first relay output contact of the gas control safety grid is connected with the gas control relay in series and then connected with the two ends of a power supply, and the second relay output contact of the gas control safety grid is connected with the alarm control relay in series and then connected with the two ends of the power supply; the normally open contact of the gas control relay is arranged between the output end of the transformer and the vacuum contactor, and the normally open contact of the alarm control relay is arranged between the output end of the transformer and the alarm circuit. The utility model discloses can realize gas monitoring and report to the police in advance, can wide application in the colliery field.
Description
Technical Field
The utility model relates to a colliery field, concretely relates to along with boring formula gas alarm system.
Background
Various drilling machines under coal mines often utilize a gas monitoring system arranged on a drilling site at a mine side to monitor gas. When the gas concentration exceeds the standard, the gas monitoring system gives an alarm, and an operator turns off the drilling machine after hearing the alarm. The reaction time from the gas exceeding the standard to the press emergency stop of the operator is avoided by manpower. The time is the most dangerous time, and the gas alarm system while drilling is designed for the condition.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the deficiencies in the prior art, the technical problem who solves is: provides a gas alarm system while drilling.
In order to solve the technical problem, the utility model discloses a technical scheme be: a gas alarm system while drilling comprises a main circuit and a control circuit, wherein three-phase alternating current in the main circuit is connected with a drilling machine motor after passing through a normally open contact of a vacuum contactor, the three-phase alternating current in the control circuit supplies power to the vacuum contactor after passing through a transformer, the gas alarm system further comprises an alarm control circuit, the alarm control circuit comprises a first switch type gas sensor, a second switch type gas sensor, a gas control safety grid, a gas control relay, an alarm control relay and an alarm circuit, the output end of the first switch type gas sensor is connected with the first input end of the gas control safety grid, the output end of the second switch type gas sensor is connected with the second input end of the gas control safety grid, the output contact of the first relay of the gas control safety grid is connected with the two ends of a power supply after being connected with the gas control relay in series, the output contact of the second relay of the gas control safety grid is connected with the alarm control relay in series and then connected to two ends of a power supply; the normally open contact of the gas control relay is arranged between the output end of the transformer and the vacuum contactor, and the normally open contact of the alarm control relay is arranged between the output end of the transformer and the alarm circuit.
The while-drilling gas alarm system further comprises a gas concentration sensor and a display, wherein the output end of the gas concentration sensor is connected with the input end of the display.
The while-drilling gas alarm system further comprises a UPS (uninterrupted Power supply), wherein the input end of the UPS is connected with the output end of the transformer, and the output end of the UPS is connected with the power supply end of the gas control safety grid.
The set off value of the first switch type gas sensor is 1.25%, and the set off value of the second switch type gas sensor is 1%.
The alarm circuit comprises an audible and visual alarm.
Compared with the prior art, the utility model following beneficial effect has: the utility model discloses can realize the gas monitoring in the pit of gas colliery, when gas concentration reaches the alarm value, pay attention to through alarm lamp and alarm sound operating personnel, close the processing to the rig, when gas concentration transfinites, the system cuts off rig work automatically, makes the rig power failure report to the police, has simplified the operation flow, has improved the efficiency of construction.
Drawings
Fig. 1 is a block diagram illustrating a structure of a gas alarm system while drilling according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a while-drilling gas alarm system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-2, the present embodiment provides a while-drilling gas alarm system, which includes a main circuit and a control circuit, wherein a three-phase ac power is connected to a drilling machine motor through a normally open contact of a vacuum contactor, and a three-phase ac power supplies power to the vacuum contactor through a transformer, and further includes an alarm control circuit, wherein the alarm control circuit includes a first switch-type gas sensor, a second switch-type gas sensor, a gas control safety grid, a gas control relay KA1, an alarm control relay KA2, and an alarm circuit, an output end of the first switch-type gas sensor is connected to a first input end of the gas control safety grid, an output end of the second switch-type gas sensor is connected to a second input end of the gas control safety grid, an output contact of the first relay of the gas control safety grid is connected to two ends of a power supply after being connected in series with the gas control relay, the output contact of the second relay of the gas control safety grid is connected with the alarm control relay in series and then connected to two ends of a power supply; the normally open contact of the gas control relay is arranged between the output end of the transformer and the vacuum contactor, and the normally open contact of the alarm control relay is arranged between the output end of the transformer and the alarm circuit.
Specifically, in the present embodiment, the set off value of the first switching gas sensor is 1.25%, and the set off value of the second switching gas sensor is 1%. Specifically, in this embodiment, the first switch type gas sensor and the second switch type gas sensor are GJC4 type coal mine low-concentration methane sensors.
In addition, the formula gas alarm system while drilling that this embodiment provided still includes gas concentration sensor and display, the output of gas concentration sensor with the input of display is connected.
Further, the while-drilling gas alarm system that this embodiment provided still includes the UPS power, the input of UPS power with the output of transformer is connected, the output of UPS power with the power end of gas control safety grid is connected. The UPS is used for supplying power to the gas control safety barrier, the gas sensor and the display.
Further, in this embodiment, the alarm circuit includes an audible and visual alarm.
In addition, the while-drilling gas alarm system of this embodiment still includes phase relay, and three phase current passes through phase relay's contact after be connected with the input of transformer, and phase relay can avoid leading to the circuit short circuit to cause the accident because of the wiring mistake.
The working principle of the utility model is as follows: after the UPS power supply starting button is pressed down, the gas concentration sensor is electrified and started, and the display displays gas data. If the gas concentration is below 1%, neither the first switch type gas sensor nor the second switch type gas sensor acts, under the action of the gas control safety barrier, the gas control relay KA1 is electrified, the normally open contact of the gas control relay is connected with the control circuit power supply, the alarm control relay KA2 is powered off, and the normally open contact of the alarm control relay is disconnected with the alarm circuit power supply; if the gas concentration is 1% -1.25%, the second switch type gas sensor acts to output a cut-off signal, the gas control safety barrier controls the alarm control relay KA2 to be electrified, the normally open contact of the gas control safety barrier is connected with the alarm circuit power supply, the alarm circuit works, the gas alarm lamp flickers to remind an operator of paying attention, and meanwhile, the gas control safety barrier gas control relay can also be started; if the gas concentration exceeds 1.25%, the second switch type gas sensor outputs a disconnection signal, the safety barrier controls the gas control relay KA1 to be powered off, and the normally open contact of the safety barrier disconnects the power supply of the control circuit, so that the drilling machine stops working.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. A gas alarm system while drilling comprises a main circuit and a control circuit, wherein three-phase alternating current in the main circuit is connected with a drilling machine motor after passing through a normally open contact of a vacuum contactor, and three-phase alternating current in the control circuit supplies power to the vacuum contactor after passing through a transformer, and the gas alarm system is characterized by further comprising an alarm control circuit, wherein the alarm control circuit comprises a first switch type gas sensor, a second switch type gas sensor, a gas control safety grid, a gas control relay, an alarm control relay and an alarm circuit, the output end of the first switch type gas sensor is connected with the first input end of the gas control safety grid, the output end of the second switch type gas sensor is connected with the second input end of the gas control safety grid, the output contact of the first relay of the gas control safety grid is connected with the two ends of a power supply after being connected with the gas control relay in series, the output contact of the second relay of the gas control safety grid is connected with the alarm control relay in series and then connected to two ends of a power supply; the normally open contact of the gas control relay is arranged between the output end of the transformer and the vacuum contactor, and the normally open contact of the alarm control relay is arranged between the output end of the transformer and the alarm circuit.
2. The while-drilling gas alarm system as recited in claim 1, further comprising a gas concentration sensor and a display, wherein an output end of the gas concentration sensor is connected with an input end of the display.
3. The while-drilling gas alarm system of claim 1, further comprising a UPS, wherein an input of the UPS is connected to an output of the transformer, and an output of the UPS is connected to a power supply terminal of the gas control safety grid.
4. The while drilling gas alarm system of claim 1, wherein the first switch type gas sensor has a set off value of 1.25%, and the second switch type gas sensor has a set off value of 1%.
5. The gas while drilling alarm system of claim 1, wherein the alarm circuit comprises an audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920638038.XU CN210134975U (en) | 2019-05-07 | 2019-05-07 | While-drilling gas alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920638038.XU CN210134975U (en) | 2019-05-07 | 2019-05-07 | While-drilling gas alarm system |
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| Publication Number | Publication Date |
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| CN210134975U true CN210134975U (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920638038.XU Active CN210134975U (en) | 2019-05-07 | 2019-05-07 | While-drilling gas alarm system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933477A (en) * | 2021-10-26 | 2022-01-14 | 扎赉诺尔煤业有限责任公司 | Continuous monitoring system for coal mining machine after airborne gas monitoring power failure |
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2019
- 2019-05-07 CN CN201920638038.XU patent/CN210134975U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933477A (en) * | 2021-10-26 | 2022-01-14 | 扎赉诺尔煤业有限责任公司 | Continuous monitoring system for coal mining machine after airborne gas monitoring power failure |
| CN113933477B (en) * | 2021-10-26 | 2024-04-19 | 扎赉诺尔煤业有限责任公司 | Continuous monitoring system for coal mining machine after onboard gas monitoring and power failure |
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