CN210039031U - Comprehensive pipe rack fire disaster active detection device - Google Patents
Comprehensive pipe rack fire disaster active detection device Download PDFInfo
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- CN210039031U CN210039031U CN201921250790.3U CN201921250790U CN210039031U CN 210039031 U CN210039031 U CN 210039031U CN 201921250790 U CN201921250790 U CN 201921250790U CN 210039031 U CN210039031 U CN 210039031U
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Abstract
The utility model provides a utility tunnel conflagration initiative detection device, include: the device comprises an air pump, a temperature detection circuit, a smoke detection circuit and a humidity detection circuit; the air pump collects air in the environment of the comprehensive pipe rack by using a sampling pipeline and pumps the air into the detection cabin; a smoke detection circuit, a temperature detection circuit and a humidity detection circuit are arranged in the detection cabin, and a differential pressure detection circuit is arranged in the sampling pipeline; the smoke detection circuit detects the smoke concentration in the air, and immediately gives an alarm when the smoke concentration exceeds a set threshold; the temperature detection circuit simultaneously detects the ambient temperature, and generates an alarm when the ambient temperature exceeds a threshold value; when the differential pressure detection circuit is blocked, the pressure difference of the pipeline is increased, and the differential pressure detection circuit outputs an alarm. This openly has set up filter cap, differential pressure detection circuitry on the pipeline, and filter cap can effectively prevent the interference of dust, mosquito, improves the precision, and differential pressure detection circuitry ensures to filter the cap and blocks up the back, in time reports an emergency and asks for help or increased vigilance, reminds to change.
Description
Technical Field
The utility model relates to a detect technical field, especially relate to a utility tunnel conflagration initiative detection device.
Background
The utility tunnel is located the underground, contains combustible substance such as power cable. When a fire disaster happens in the pipe gallery, the combustion of the insulating material on the outer layer of the cable easily generates toxic and harmful gas, and the safety of personnel is seriously threatened. And moreover, the fire disaster easily causes the damage of equipment in the pipe gallery, and influences the operation of the equipment.
The existing fire detection technology adopts an independent smoke detector, an independent temperature detector and an independent temperature measuring optical cable for detection. The modes belong to passive detection, namely, when the smoke is accumulated to a certain concentration, the alarm is generated when the temperature exceeds a certain range. In most cases, a large amount of smoke and temperature are generated only when the fire develops to the middle and later stages, the detector is triggered to alarm, the cable is damaged at the moment, and the fire is difficult to control.
SUMMERY OF THE UTILITY MODEL
The purpose of this specification embodiment is to provide a utility tunnel conflagration initiative detection device, can initiatively detect the smog concentration in the environment, the temperature condition, in the initial stage of the conflagration emergence, can accurately distinguish.
This description embodiment provides a utility tunnel conflagration initiative detection device, realizes through following technical scheme:
the method comprises the following steps:
the device comprises an air pump, a temperature detection circuit, a smoke detection circuit and a humidity detection circuit;
the air pump collects air in the environment of the comprehensive pipe rack by using a sampling pipeline and pumps the air into the detection cabin;
a smoke detection circuit, a temperature detection circuit and a humidity detection circuit are arranged in the detection cabin, and a differential pressure detection circuit is arranged in the sampling pipeline;
the smoke detection circuit detects the smoke concentration in the air, and immediately gives an alarm when the smoke concentration exceeds a set threshold;
the temperature detection circuit simultaneously detects the ambient temperature, and generates an alarm when the ambient temperature exceeds a threshold value;
when the differential pressure detection circuit is blocked, the pressure difference of the pipeline is increased, and the differential pressure detection circuit outputs an alarm.
According to a further technical scheme, one end of the sampling pipeline is connected with the filtering cap, and the other end of the sampling pipeline is connected with the air pump.
According to the technical scheme, the temperature detection circuit comprises a temperature detection sensor, the temperature detection sensor outputs the difference value of the change parameters by detecting signals through a bridge network circuit, data output by the bridge network circuit respectively pass through a window comparison circuit and a subtracter, and the window comparison circuit and the subtracter can directly extract the difference value of the bridge network circuit, so that the temperature change difference value is detected.
According to the further technical scheme, the output end of the temperature detection circuit is connected with the controller, and detected data are transmitted to the controller.
According to a further technical scheme, the smoke detection circuit comprises a photoresistor, a comparison circuit and a relay which are connected in sequence;
the photoresistor detects the environmental smoke concentration of being surveyed to transmit the detected signal to comparison circuit, comparison circuit makes the relay output high level when concentration is greater than the setting value.
In a further technical scheme, the photoresistor is also connected with a light-emitting diode.
According to a further technical scheme, the differential pressure detection circuit comprises a differential pressure sensor and a comparison circuit which are sequentially connected;
the differential pressure sensor transmits the detected pressure signal to the comparison circuit, and the comparison circuit outputs high level when the detected pressure signal is greater than a set value and enables the light emitting diode connected with the comparison circuit to be lightened.
According to a further technical scheme, the output end of the differential pressure detection circuit is also connected with the controller, and the detected value is output to the controller.
In a further technical scheme, the air pump is driven by an air pump driving circuit, and the air pump driving circuit is connected with a control.
Compared with the prior art, the beneficial effect of this disclosure is:
according to the smoke concentration sampling device, the air pump is arranged, smoke concentration in the air is sampled actively, active detection is achieved, fire hazard is found as soon as possible, loss is reduced, and the problem that time delay is detected passively in the past is solved.
This openly has set up filter cap, differential pressure detection circuitry on the pipeline, and filter cap can effectively prevent the interference of dust, mosquito, improves the precision, and differential pressure detection circuitry ensures to filter the cap and blocks up the back, in time reports an emergency and asks for help or increased vigilance, reminds to change.
This device of this disclosure detects temperature, smog simultaneously, adopts dual environment weight to detect, has improved the accuracy of fire detection.
This disclosure provides a temperature detection circuit. The novel point of the circuit is that a window comparison circuit and a subtracter are used for extracting the measured difference value, so that the temperature variation can be accurately identified.
The present disclosure provides a smoke detection circuit. The circuit has the innovation point that a three-stage amplifier is used to form a comparison circuit, and the resistance value change range of the photoresistor can be analyzed, so that the smoke concentration can be accurately judged.
The present disclosure provides a differential voltage detection circuit. The circuit is characterized in that two comparators are used for analyzing and identifying whether the pressure difference exceeds a set value or not and a diode is used for making a light indication. Meanwhile, the controller can also receive the detection value of the pressure difference sensor to make analysis and judgment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is an overall configuration diagram of an embodiment of the present disclosure;
FIG. 2 is a circuit diagram of a temperature detection circuit according to an embodiment of the disclosure;
FIG. 3 is a smoke detection circuit diagram of an embodiment of the present disclosure;
FIG. 4 is a circuit diagram of differential pressure detection according to an exemplary embodiment of the disclosure;
fig. 5 is a circuit diagram of an air pump driving circuit according to an embodiment of the present disclosure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example of implementation 1
The embodiment discloses a comprehensive pipe gallery fire active detection device, which is shown in an attached figure 1 and comprises a sampling pipeline, a filter cap, an air pump, a temperature detection circuit, a smoke detection circuit and a differential pressure detection circuit.
The sampling pipeline anterior segment sets up the filter cap, prevents mosquito in the air, dust interference, takes place the wrong report police. Ambient air is drawn into the test chamber by an air pump. A smoke detection circuit in the cabin analyzes the smoke concentration in the air, and immediately gives an alarm after the smoke concentration exceeds a set threshold value.
The temperature detection circuit detects the ambient temperature at the same time, and when the ambient temperature exceeds a threshold value, an alarm is also generated.
In order to avoid the blockage of the filter cap, differential pressure detection is arranged on the pipeline, when the blockage occurs, the pressure difference of the pipeline is increased, and the circuit outputs an alarm to remind the filter cap to be replaced.
Temperature detection circuit, referring to fig. 2, PT1000 is a temperature detection sensor. PT1000, R1, R2, R3 and R4 form a bridge network circuit. The effect is to utilize the bridge circuit to output the difference value of the variable parameters.
The operational amplifier U1, the U2 resistor R5, R6 and R7 form a window comparison circuit.
The operational amplifier U3 and the resistor R8R9R10R11 form a subtracter.
The window comparison circuit and the subtracter can directly extract the difference value of the bridge circuit, so that the temperature variation difference value can be detected.
The novel point of the circuit is that a window comparison circuit and a subtracter are used for extracting the measured difference value, so that the temperature variation can be accurately identified.
The smoke detection circuit, as shown in fig. 3, L1 is a light emitting diode, and R5 is a photo resistor.
When the set sampling period comes and the smoke concentration needs to be detected, the light emitting diode works to emit light. The light sensitive resistor receives the light of the diode. When smoke exists, the smoke blocks the photoresistor from receiving, and the photoresistor outputs high impedance. When there is no smoke, the photoresistor receives more light and outputs low impedance.
When the smoke concentration of the measured environment is higher, the illumination received by the photoresistor is lower, and the resistance value is higher.
When the smoke concentration exceeds a certain threshold value, the resistance value of the photosensitive resistor is increased to a certain value, the triode Q1 is conducted, the triode Q2 is cut off, the triode Q3 is conducted, and the relay outputs high level.
The circuit has the innovation point that a three-stage amplifier is used to form a comparison circuit, and the resistance value change range of the photoresistor can be analyzed, so that the smoke concentration can be accurately judged.
Differential pressure sensing circuit, see fig. 4, SEN is a differential pressure sensor, operational amplifier U1 constitutes a first comparison circuit, and operational amplifier U2 constitutes a second comparison circuit.
The sliding resistance P1 is used for analog setting of the threshold.
The light emitting diodes D1, D2 are used to indicate whether the pressure difference exceeds a set threshold.
The I/O port is used to send the detection value to the controller.
When SEN detects that the pressure difference is greater than the set threshold, operational amplifier U1 outputs a high level and operational amplifier U2 outputs a low level. At this time, the led D2 lights up.
When SEN detects that the pressure difference is less than the set threshold, the operational amplifier U1 outputs a low level and the operational amplifier U2 outputs a high level. At this time, the led D1 lights up.
The circuit is characterized in that two comparators are used for analyzing and identifying whether the pressure difference exceeds a set value or not and a diode is used for making a light indication. Meanwhile, the controller can also receive the detection value of the pressure difference sensor to make analysis and judgment.
The air pump driving circuit is shown in fig. 5, wherein R46, R45, R40, R41 and Q3 form a first-stage amplification, U31 forms a second-stage amplification, and L4, C24 and C25 form a filter circuit.
The circuit has the innovation points that two-stage driving amplification is utilized, the driving current of PWM is improved, and the controller can directly control the rotating speed of the air pump.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or materials described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (9)
1. The utility model provides a utility tunnel conflagration initiative detection device, characterized by includes:
the device comprises an air pump, a temperature detection circuit, a smoke detection circuit and a humidity detection circuit;
the air pump collects air in the environment of the comprehensive pipe rack by using a sampling pipeline and pumps the air into the detection cabin;
a smoke detection circuit, a temperature detection circuit and a humidity detection circuit are arranged in the detection cabin, and a differential pressure detection circuit is arranged in the sampling pipeline;
the smoke detection circuit detects the smoke concentration in the air, and immediately gives an alarm when the smoke concentration exceeds a set threshold;
the temperature detection circuit simultaneously detects the ambient temperature, and generates an alarm when the ambient temperature exceeds a threshold value;
when the differential pressure detection circuit is blocked, the pressure difference of the pipeline is increased, and the differential pressure detection circuit outputs an alarm.
2. The active fire detection device for the utility tunnel according to claim 1, wherein one end of the sampling pipeline is connected with the filter cap, and the other end is connected with the air pump.
3. The active fire detection device for the utility tunnel according to claim 1, wherein the temperature detection circuit comprises a temperature detection sensor, the temperature detection sensor outputs a difference value of a variation parameter by passing a detected signal through a bridge network circuit, the data output by the bridge network circuit passes through a window comparison circuit and a subtracter respectively, and the window comparison circuit and the subtracter can directly extract the difference value of the bridge network circuit, so as to detect the temperature variation difference value.
4. An active fire detection device for a utility tunnel according to claim 1 or 2, wherein the output of the temperature detection circuit is connected to the controller for transmitting the detected data to the controller.
5. The active fire detection device for the utility tunnel according to claim 1, wherein the smoke detection circuit comprises a photoresistor, a comparison circuit and a relay which are connected in sequence;
the photoresistor detects the environmental smoke concentration of being surveyed to transmit the detected signal to comparison circuit, comparison circuit makes the relay output high level when concentration is greater than the setting value.
6. The active fire detection device for the utility tunnel according to claim 5, wherein the light sensitive resistor is further connected with a light emitting diode.
7. The active fire detection device for the utility tunnel according to claim 1, wherein the differential pressure detection circuit comprises a differential pressure sensor and a comparison circuit which are connected in sequence;
the differential pressure sensor transmits the detected pressure signal to the comparison circuit, and the comparison circuit outputs high level when the detected pressure signal is greater than a set value and enables the light emitting diode connected with the comparison circuit to be lightened.
8. The active fire detection device for the utility tunnel according to claim 1 or 7, wherein the output end of the differential pressure detection circuit is further connected with the controller, and the detected value is output to the controller.
9. The active fire detection device for the utility tunnel according to claim 1, wherein the air pump is driven by an air pump driving circuit, and the air pump driving circuit is connected with the control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921250790.3U CN210039031U (en) | 2019-08-01 | 2019-08-01 | Comprehensive pipe rack fire disaster active detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921250790.3U CN210039031U (en) | 2019-08-01 | 2019-08-01 | Comprehensive pipe rack fire disaster active detection device |
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| CN210039031U true CN210039031U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921250790.3U Active CN210039031U (en) | 2019-08-01 | 2019-08-01 | Comprehensive pipe rack fire disaster active detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117703242A (en) * | 2024-02-06 | 2024-03-15 | 四川名人居门窗有限公司 | System and system door for detecting fire smoke at door edge |
-
2019
- 2019-08-01 CN CN201921250790.3U patent/CN210039031U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117703242A (en) * | 2024-02-06 | 2024-03-15 | 四川名人居门窗有限公司 | System and system door for detecting fire smoke at door edge |
| CN117703242B (en) * | 2024-02-06 | 2024-05-10 | 四川名人居门窗有限公司 | System and system door for detecting fire smoke at door edge |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An active fire detection device for comprehensive pipe gallery Effective date of registration: 20220615 Granted publication date: 20200207 Pledgee: Ji'nan rural commercial bank Limited by Share Ltd. high tech branch Pledgor: JINAN HELISHI AUTOMATION Co.,Ltd. Registration number: Y2022980007737 |