CN217540412U - Natural gas leakage alarm device - Google Patents
Natural gas leakage alarm device Download PDFInfo
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- CN217540412U CN217540412U CN202220749783.3U CN202220749783U CN217540412U CN 217540412 U CN217540412 U CN 217540412U CN 202220749783 U CN202220749783 U CN 202220749783U CN 217540412 U CN217540412 U CN 217540412U
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Abstract
The utility model discloses a natural gas leakage alarm device, including rotating the platform and revealing the detector, should reveal the detector set up in on the rotation mesa of rotating the platform, reveal the detector and include initiative infrared gas detector and passive infrared gas detector, this initiative infrared gas detector and passive infrared gas detector are through change over switch connection power, it opens the switch to have concatenated the intermittent type in the power supply loop of initiative infrared gas detector. Adopt the utility model discloses an alarm device is revealed to natural gas through the initiative infrared gas detector who sets up, can be when relatively between ambient temperature and natural gas temperature, replaces the gas leakage condition in the passive infrared gas detector continues monitoring natural gas station, can drive the infrared gas detector rotation of initiative through the rotation platform that sets up to enlarge the detection range of initiative infrared gas detector.
Description
Technical Field
The utility model relates to an observation device technical field of the fluid tightness of structural component, concretely relates to alarm device is revealed to natural gas.
Background
In daily life, once natural gas leakage occurs in a natural gas station, accidents such as fire disasters and explosions which harm the life and property safety of people are easy to happen. Therefore, how to quickly detect the gas leakage condition of the natural gas station is one of the most urgent problems to be solved for building the natural gas station.
The existing technologies for detecting natural gas leakage mainly comprise a passive infrared detection technology and an active infrared detection technology. The passive infrared detection technology has the advantages of wide detection range, no need of a radiation source and a reflection background and the like. However, the passive infrared detection technology requires that a large relative temperature difference must exist between the natural gas and the environment, otherwise, the gas leakage condition cannot be accurately detected.
The main infrared detection technology does not require the relative temperature difference between the natural gas and the environment, and can effectively make up for the defects of the passive infrared detection technology. However, the active infrared detection technology needs a radiation source and a reflection background, and the detection range is narrow. Therefore, a need exists for a technique that can remedy the deficiencies of both detection techniques.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model provides a natural gas reveals alarm device can compensate the defect of two kinds of detection technique.
The utility model provides a natural gas leakage alarm device, in a first realizable mode, including rotating the platform and revealing the detector, should reveal the detector set up in on the rotation mesa of rotating the platform, reveal the detector and include initiative infrared gas detector and passive infrared gas detector, this initiative infrared gas detector and passive infrared gas detector are through change over switch connection power, it stops the switch to have concatenated the intermittent type in the power supply loop of initiative infrared gas detector.
In combination with the first implementable manner, in a second implementable manner, the leak detector is connected to the rotary table-top via a universal joint.
With reference to the first implementable manner, in a third implementable manner, the rotating table comprises a driving motor, a transmission gear box and a rotating disc, the top of the rotating disc is connected with the rotating table top, and the bottom of the rotating disc is in transmission connection with a driving shaft of the driving motor through the transmission gear box.
With reference to the first implementable manner, in a fourth implementable manner, the switch is a temperature switch configured to monitor an ambient temperature of the detection area, and when the ambient temperature is within a threshold range, the temperature switch conducts a power supply loop of the active infrared gas detector, and when the ambient temperature is not within the threshold range, the temperature switch conducts a power supply loop of the passive infrared gas detector.
With reference to the first implementable manner, in a fifth implementable manner, the intermittent start-stop switch is an intermittent timing switch.
With reference to the first implementable manner, in a sixth implementable manner, the intermittent start-stop switch includes an encoder and a time relay, the encoder is configured to detect the angular displacement of the rotary table top and is in signal connection with the time relay, and a normally closed switch of the time relay is connected in series in a power supply loop of the active infrared gas detector.
Has the beneficial effects that: adopt the utility model discloses a natural gas leakage alarm device, through the initiative infrared gas detector who sets up, can be when relatively between ambient temperature and natural gas temperature, take over the gas leakage condition in the passive infrared gas detector continues monitoring natural gas station, can drive initiative infrared gas detector through the rotation platform that sets up and rotate to enlarge initiative infrared gas detector's detection range.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a schematic structural view of a natural gas leakage alarm device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the distribution of the reflection plates;
fig. 3 is a schematic circuit diagram of a switch according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a switch according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a switch according to an embodiment of the present invention;
reference numerals:
the device comprises a rotating table 1, a rotating table top 2, an active infrared gas detector 3, a passive infrared gas detector 4, an encoder 5, a reflecting plate 6, a driving motor 7, a transmission gear box 8, a rotating disc 9 and a universal joint 10.
Detailed Description
Embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Example one
As shown in fig. 1, the natural gas leakage alarm device comprises a rotating table 1 and a leakage detector, wherein the leakage detector is arranged on a rotating table surface 2 of the rotating table 1, the leakage detector comprises an active infrared gas detector 3 and a passive infrared gas detector 4, the active infrared gas detector 3 and the passive infrared gas detector 4 are connected with a power supply through a change-over switch, and an intermittent start-stop switch is connected in series in a power supply loop of the active infrared gas detector 3.
Specifically, the alarm device is composed of a rotary table 1 leakage detector. The gas leakage condition of the corresponding monitoring area can be monitored by the leakage detector, the leakage detector is installed on the rotary table top 2 of the rotary table 1, and the rotary table 1 can drive the leakage detector to rotate together when rotating, so that the leakage detector can scan a larger monitoring area, and the monitoring area of the alarm device is enlarged.
As shown in fig. 3, the leak detector is composed of an active infrared gas detector 3 and a passive infrared gas detector 4, and a change-over switch is connected in series in the power supply loop of the active infrared gas detector 3 and the passive infrared gas detector 4. When the difference between the ambient temperature of the natural gas station and the natural gas temperature in the natural gas pipeline is large, the power supply loop of the passive infrared gas detector can be switched on through the change-over switch, and the gas leakage condition of a monitoring area is monitored through the passive infrared gas detector.
When the difference between the ambient temperature of the natural gas station and the natural gas temperature in the natural gas pipeline is small, the power supply loop of the active infrared gas detector 3 can be switched on through the change-over switch. The power supply circuit of the active infrared gas detector 3 is conducted to emit laser to the reflecting plate 6, the reflecting plate 6 can reflect the emitted laser to the active infrared gas detector 3, and the active infrared gas detector 3 can determine the natural gas leakage condition of the area between the reflecting plate 6 and the active infrared gas detector 3 by analyzing the reflected laser.
As shown in fig. 2, a plurality of reflective plates 6 may be disposed around the leak detector in the monitoring area, and the turntable 1 may drive the active infrared gas detector 3 to scan each reflective plate 6, thereby expanding the monitoring area. All the reflecting plates 6 can be uniformly distributed in a monitoring area, and an intermittent start-stop switch can be further connected in series in a power supply loop of the active infrared gas detector. When the active infrared gas detector 3 rotates to be aligned with the reflecting plate 6, the intermittent start-stop switch is closed, and the intermittent start-stop switch can be opened at other time. Therefore, the active infrared gas detector 3 can intermittently emit laser, so that the energy consumption is reduced and the service life of the active infrared gas detector 3 is prolonged.
In this embodiment, the leak detector is optionally connected to the rotary table top 2 via a universal joint 10, as shown in fig. 1.
Because there are many pipelines in the natural gas station, the installation environment of the leak detector is relatively complicated, and for this reason, the leak detector can be connected with the rotary table top 2 through the universal joint 10. One end of the universal joint 10 may be fixed to the rotary table top 2 and the other end may be fixed to a mounting of the leak detector. In this manner, the leak detector may be deflected in any direction to accommodate the complex installation environment within the natural gas station.
In this embodiment, optionally, the rotating table 1 includes a driving motor, a transmission gear box and a rotating disk, the top of the rotating disk is connected with the rotating table top 2, and the bottom of the rotating disk is in transmission connection with a driving shaft of the driving motor through the transmission gear box.
The rotating platform 1 consists of a driving motor 7, a transmission gear box 8 and a rotating disk 9, the top of the rotating disk 9 can be fixedly connected with the rotating platform surface 2 through a connecting shaft, and the bottom of the rotating disk can be connected with the driving motor 7 through the transmission gear box 8. The driving motor 7 can drive the rotating disc 9 to rotate through the transmission gear box 8, and the rotating disc 9 can drive the rotating table top 2 to rotate together through the connecting shaft, so that the leakage detector is driven to rotate.
In this embodiment, optionally, as shown in fig. 3, the switch is a temperature switch, and the temperature switch is configured to monitor an ambient temperature of the detection area, and when the ambient temperature is within a threshold range, the temperature switch conducts a power supply loop of the active infrared gas detector, and when the ambient temperature is not within the threshold range, the temperature switch conducts a power supply loop of the passive infrared gas detector.
Specifically, the temperature change-over switch can monitor whether the ambient temperature in the natural gas station is in a threshold range in real time, and the threshold range corresponds to the natural gas temperature range in the natural gas pipe network. When the temperature change-over switch detects that the ambient temperature is not within the preset threshold range, at the moment, relative temperature difference exists between the natural gas in the pipeline and the natural gas station, the temperature change-over switch can conduct a power supply loop of the passive infrared gas detector, and the natural gas leakage condition of the natural gas station is detected through the passive infrared gas detector.
When the temperature change-over switch detects that the ambient temperature is within the preset threshold range, the temperature change-over switch can be automatically switched to a power supply loop for conducting the active infrared gas detector, and the natural gas leakage condition of the natural gas station is continuously detected through the active infrared gas detector.
Specifically, the temperature switch may be composed of a temperature sensor U, a comparator circuit, a transistor T, and a relay D. The temperature sensor U can detect the temperature in the natural gas station and send the detected temperature signal to the comparator circuit, and the comparator circuit can compare the temperature signal with a reference voltage to determine whether the voltage of the temperature signal is within a reference voltage range. The reference voltage comprises a high reference voltage and a low reference voltage, and the high reference voltage and the low reference voltage respectively correspond to the highest temperature and the lowest temperature of the natural gas in the pipeline.
When the voltage of the temperature signal is within the reference voltage range, the output end of the comparator circuit outputs a high level signal, the triode T can conduct a passage between the relay D and the power supply, the normally open switch of the relay D can be closed, the power supply loop of the active infrared gas detector is conducted, and the power supply loop of the passive infrared gas detector is disconnected. And otherwise, disconnecting the power supply loop of the active infrared gas detector and connecting the power supply loop of the passive infrared gas detector.
As shown in fig. 4, the temperature switch may also be composed of a first temperature switch K1 and a second temperature switch K2, and both the first temperature switch K1 and the second temperature switch K2 are bimetal temperature switches. Wherein, first temperature switch K1 concatenates between power and active infrared gas detector, and first temperature switch K1 can be automatic closed when the ambient temperature at the natural gas station is in the threshold value within range to make the power supply to active infrared gas detector power supply. The second temperature switch K2 is connected between the power supply and the passive infrared gas detector in series, and the second temperature switch K2 can be automatically closed when the ambient temperature of the natural gas station exceeds the threshold range, so that the power supply supplies power to the passive infrared gas detector.
In this embodiment, optionally, the intermittent start-stop switch is an intermittent timing switch. Particularly, because all reflecting plates 6 are around leaking the detector evenly distributed, consequently, the revolving stage 1 can be the invariable uniform velocity revolving stage 1 of angular displacement speed, and intermittent type start-stop switch can select for use the closed intermittent type time switch of timing, just so can set for the closure interval time of intermittent type time switch according to the quantity of expelling plate in the monitoring area to convenient control initiative infrared gas detector 3's start-stop time.
As shown in fig. 3, the intermittent timing switch includes a time relay KT, and a normally open switch of the time relay KT may be connected in series between the active infrared gas detector 3 and the change-over switch. The action signal input of the time relay KT may be connected to the output of the comparator circuit. When comparator circuit output high level, time relay KT just begins the timing, and when the interval time reached predetermined time, time relay KT will be closed at once, makes the power supply circuit of initiative infrared gas detector 3 switch on.
Example two
The second embodiment is substantially the same as the first embodiment, and the main differences are as follows: as shown in fig. 1 and 5, the intermittent on-off switch includes an encoder 5 and a time relay, the encoder 5 is configured to detect the angular displacement of the rotary table top 2 and is in signal connection with the time relay, and a normally closed switch of the time relay is connected in series in a power supply loop of the active infrared gas detector 3.
Specifically speaking, intermittent type opens and stops the switch and can constitute by encoder 5 and time relay, encoder 5 can detect the turned angle of revolving stage 1 to periodically to time relay output signal of telecommunication, after time relay received the signal of telecommunication, time relay's normally closed switch will break off at once and begin the timing, when the timing reaches predetermined time interval, time relay will close normally closed switch at once, make the power supply circuit of initiative infrared gas detector 3 switch on the gas leakage condition in the detection area that detects. In this embodiment, the time interval can be set as the time required for the active infrared gas detector 3 to rotate from the current reflecting plate 6 to the next adjacent reflecting plate 6, and the time interval can be calculated by the angular displacement speed of the rotating table 1 and the included angle between two adjacent reflecting plates 6.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; 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 substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.
Claims (6)
1. The utility model provides a natural gas leakage alarm device, its characterized in that, including rotating the platform and revealing the detector, should reveal the detector set up in on the rotation mesa of rotating the platform, reveal the detector and include initiative infrared gas detector and passive infrared gas detector, this initiative infrared gas detector and passive infrared gas detector are through change over switch connection power, it stops the switch to have concatenated intermittent type in the power supply loop of initiative infrared gas detector.
2. The natural gas leakage warning device of claim 1, wherein the leakage detector is connected to the rotary table via a universal joint.
3. The natural gas leakage alarm device according to claim 1, wherein the rotary table comprises a driving motor, a transmission gear box and a rotary disc, the top of the rotary disc is connected with the rotary table top, and the bottom of the rotary disc is in transmission connection with a driving shaft of the driving motor through the transmission gear box.
4. The natural gas leakage alarm device according to claim 1, wherein the switch is a temperature switch configured to monitor an ambient temperature of the detection area, the temperature switch conducting a power supply circuit of the active infrared gas detector when the ambient temperature is within a threshold range, and conducting a power supply circuit of the passive infrared gas detector when the ambient temperature is not within the threshold range.
5. The natural gas leakage alarm device of claim 1, wherein the intermittent start and stop switch is an intermittent timing switch.
6. The natural gas leakage warning device according to claim 1, wherein the intermittent start/stop switch includes an encoder and a time relay, the encoder is configured to detect the angular displacement of the rotary table and is in signal connection with the time relay, and a normally closed switch of the time relay is connected in series in a power supply circuit of the active infrared gas detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220749783.3U CN217540412U (en) | 2022-03-29 | 2022-03-29 | Natural gas leakage alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220749783.3U CN217540412U (en) | 2022-03-29 | 2022-03-29 | Natural gas leakage alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217540412U true CN217540412U (en) | 2022-10-04 |
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ID=83428743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220749783.3U Active CN217540412U (en) | 2022-03-29 | 2022-03-29 | Natural gas leakage alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217540412U (en) |
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- 2022-03-29 CN CN202220749783.3U patent/CN217540412U/en active Active
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