CN216211477U

CN216211477U - Gas leakage alarm linkage box

Info

Publication number: CN216211477U
Application number: CN202122635648.4U
Authority: CN
Inventors: 罗丹; 代超; 赵云; 张静; 王勇
Original assignee: Sichuan Polytechnicians College
Current assignee: Sichuan Polytechnicians College
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a gas leakage alarm linkage box, which belongs to the technical field of combustible gas alarms and solves the problem that a gas alarm in the prior art is easy to damage an internal circuit when a high-power electric appliance is arranged. The gas leakage alarm is used for gas leakage alarm in various occasions, has manual and automatic modes, and is high in safety.

Description

Gas leakage alarm linkage box

Technical Field

The utility model belongs to the technical field of combustible gas alarms, and particularly relates to a gas leakage alarm linkage box.

Background

The combustible gas alarm is also called a gas leakage detection alarm instrument. When combustible gas leaks in industrial environment and daily life environment (such as a kitchen using natural gas), and the combustible gas alarm detects that the concentration of the combustible gas reaches an alarm value set by the alarm, the combustible gas alarm can send out sound and light alarm signals to remind people to evacuate, forcibly exhaust, shut down equipment and other safety measures. And 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. It is often used in places where flammable gases are used or generated in chemical plants, oil, gas stations, steel plants, etc.

The industrial fixed type combustible gas alarm consists of an alarm controller and a detector, wherein the controller can be placed in a duty room to mainly control each monitoring point, the detector is installed at a place where combustible gas is most prone to leakage, a core component of the detector is a built-in combustible gas sensor, and the sensor detects the concentration of gas in the air. The detector converts the gas concentration that the sensor detected into the signal of telecommunication, transmits the controller through the cable, and gas concentration is higher, and the signal of telecommunication is stronger, and when gas concentration reached or exceeded the alarm point that alarm controller set up, the alarm sends alarm signal to external equipment such as solenoid valve, air discharge fan can be started, the automatic hidden danger of getting rid of.

When a high-power electric device is connected into a gas alarm in the current market, the internal circuit of a host of the alarm device can be damaged, and the use of the alarm device is limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims to:

in order to solve the problem that a gas alarm in the prior art is easy to damage an internal circuit when a high-power electrical appliance is used, the gas leakage alarm linkage box is provided.

The technical scheme adopted by the utility model is as follows:

the utility model provides a gas leakage warning linkage case, includes the box, install power indicator, manual automatic transfer switch, valve accuse button and fan start button on the box, install control circuit board in the box, the last a plurality of interfaces that are provided with of control circuit board, control circuit board include the singlechip, the singlechip is connected with power module, input module and output module respectively, and control circuit board still is connected with earth leakage protection switch, DC power supply and ac contactor respectively.

Furthermore, the input module is respectively connected with an active input module and a passive input module.

Furthermore, the output module is respectively connected with a triode control module, a relay control module and a field effect transistor.

Further, the box still is connected with audible and visual alarm, audible and visual alarm and control circuit board electric connection.

Further, a 220V alternating current input interface, a 24V direct current input interface, a 12V pulse input interface, a low-alarm automatic input interface, a low-alarm manual input interface, a high-alarm manual input interface, a low-alarm indicator light output interface, a power indicator light output interface, a manual automatic switching input interface, a 12V pulse output interface, a low-alarm passive output interface, a low-alarm active 24V output interface, a low-alarm 220V alternating current output interface, a high-alarm 220V normally closed output interface, a high-alarm 220V pulse output interface and a program downloading interface are arranged on the control circuit board.

The high and low alarms in the present invention refer to:

high-alarm: when the gas detector detects that the content of the detected gas in the environment reaches the upper alarm limit, the gas alarm host outputs an alarm signal.

Low alarm rate: when the gas detector detects that the content of the gas to be detected in the environment reaches a low-limit alarm (the concentration just reaches a value allowing alarm), the gas alarm host outputs an alarm signal.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. according to the utility model, through different input modes and multiple output control means, on one hand, the control capability of the gas alarm system is improved, the protection capability of the system is improved, the occurrence rate of disasters is reduced, on the other hand, the gas alarm host is protected, and the risk that the high-power electrical appliance damages the internal circuit of the host is avoided.

2. The utility model can switch between a manual mode and an automatic mode, the manual mode is simple to operate, the device has clear indication, the automatic mode has high automation degree and high safety, and a user can select to switch the modes by himself, so that the use is more flexible.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a diagram of the power circuit of the present invention;

FIG. 3 is a passive input circuit of the present invention;

FIG. 4 is a pulse input circuit of the present invention;

FIG. 5 is a low power transistor control circuit according to the present invention;

FIG. 6 is a relay control circuit of the present invention;

FIG. 7 is a triode enhanced drive circuit of the present invention;

fig. 8 is a field effect transistor control circuit of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Preferably, the input module is connected with an active input module and a passive input module respectively.

Preferably, the output module is respectively connected with a triode control module, a relay control module and a field effect transistor.

Preferably, the box body is further connected with an audible and visual alarm, and the audible and visual alarm is electrically connected with the control circuit board.

Preferably, the control circuit board is provided with a 220V alternating current input interface, a 24V direct current input interface, a 12V pulse input interface, a low-alarm automatic input interface, a low-alarm manual input interface, a high-alarm manual input interface, a low-alarm indicator light output interface, a power indicator light output interface, a manual automatic switching input interface, a 12V pulse output interface, a low-alarm passive output interface, a low-alarm active 24V output interface, a low-alarm 220V alternating current output interface, a high-alarm 220V normally closed output interface, a high-alarm 220V pulse output interface and a program downloading interface.

The control circuit board is designed by a double-layer board, and the circuit is divided into three parts, namely 1, a power supply part; 2. an input section; 3. an output section:

as shown in FIG. 2, the power supply part adopts an externally provided 24V DC power supply input, and a diode is added at the input end of the power supply circuit to prevent the circuit chip from being damaged due to reverse connection of the power supply. The power supply converts 24V voltage into 12V voltage through the DCDC chip and supplies the circuit interface part to use, and the power supply converts 12V direct current voltage into 3.3V voltage through the DCDC chip again, supplies the inside small-signal use of singlechip.

As shown in fig. 3-4, the input part is divided into active and passive inputs, the passive input power source is powered by the board and forms a short circuit with the internal circuit through an external short circuit mode, so that the internal circuit generates signals. The active input is supplied by the outside, and the power supply circuit skillfully utilizes the rectifier bridge to reversely connect the positive electrode and the negative electrode of an external input signal, so that a wiring operator does not need to consider the line sequence of external wiring, and the circuit can also work normally.

The output signals of the output section fall into three main categories:

the first is the general triode control type, as shown in fig. 5, which satisfies the requirement of external low power devices, such as lamps, and the control mode is designed by referring to the switching use method of the triode.

The second is a relay control type, as shown in fig. 6, the control of the relay is basically the same as the circuit structure of the common triode control, except that a switching diode needs to be connected in parallel at the control end of the relay, in order to protect the circuit from being damaged by the coil of the relay.

It should be noted that the first and second control methods may affect the driving effect due to insufficient output current of the single chip, so that a driving circuit is added to enhance the driving capability, such as the triode enhanced driving circuit shown in fig. 7.

The third is field effect transistor, as shown in fig. 8, the front stage is controlled by a triode, and the rear stage is controlled by a field effect transistor for output, which has the advantages of large controlled current and high stability, and is mainly applied to 12V pulse output interfaces in the circuit.

The alarm comprises a manual mode and an automatic mode, and the input and the output of a circuit board are as follows:

in a manual state: the manual low-alarm passive inching signal is input, the circuit board outputs a 220v constant active signal, a 24v constant active signal and a constant passive signal, and outputs a 12v constant active signal to light the low-alarm indicator lamp. The high-alarm manual input passive inching signal: the circuit board outputs a 220v pulse active signal to start the electromagnetic valve, the 220v normally closed active electromagnetic valve is disconnected for 5 seconds, the normally closed electromagnetic valve is cut off, and a 12v pulse active signal is output to cut off the household electromagnetic valve. And outputting a square wave signal to a power supply indicator light to enable the power supply indicator light to twinkle for 5 seconds, and then, recovering to be normally on to prompt that the high alarm is started.

In an automatic state: the manual and automatic control interface is closed to enable the linkage box to be in an automatic state, at the moment, when a start button on the box is pressed, the circuit board cannot output, and when the low-alarm automatic port or the high-alarm automatic port is closed, the circuit board cannot output. The corresponding output is activated as manually pressed. How long the low alarm automatic signal is closed, how long the corresponding output is output (follows). The high-alarm automatic signal is triggered only once when being closed, and the high-alarm automatic signal is output once after being opened and closed correspondingly. 12v pulse input: only in the automatic state, when the circuit board detects this extraneous 12v pulse input signal, all outputs are enabled. The low alarm output remains (reset by manually pressing the reset button) and the high alarm output cycles once. In the manual state, the 12v pulse signal does not enable any output.

The functional principle of the utility model is as follows:

when the gas alarm host receives a concentration signal from a gas leakage detector, a switching value signal is sent to the linkage box when the concentration signal reaches a linkage value, and after a control circuit board in the linkage box receives the signal (a manual automatic change-over switch is switched to an automatic state), a 220v alternating current pulse (3 second) port (used for starting a 220v power-on valve-closing type electromagnetic valve) is started, a 220v alternating current normally closed port (3 seconds) is cut off (used for starting a 220v power-off valve-closing type electromagnetic valve), and a valve control lamp is turned on at the moment to represent that an electric signal is output. And starting a 24v constant active signal port for starting an external audible and visual alarm and the like. And starting the passive normally open signal port for outputting the switching value feedback signal. And starting a 220v constant active signal port for starting the alternating current contactor and controlling the high-power accident fan to start, wherein the fan operation indicator lamp is turned on at the moment and represents the started fan output port. When the switching value signal input by the gas alarm host is turned off, all output signals are turned off by the linkage box, and the standby state is recovered.

The specific operation of the linkage box is as follows:

when the linkage box is manually started, the manual-automatic change-over switch is switched to a manual state, the valve control button is pressed, the linkage box is released from resetting, the 220v pulse output and the normally closed power-off are started within 3 seconds, simultaneously the 12v pulse output is also started (for connecting a household non-explosion-proof gas cut-off valve), and the valve control lamp flickers to indicate that a signal is output.

And when the reset key is pressed to be released, the system is reset.

And pressing a fan key, loosening, self-locking a fan button, starting a 220v constant signal, and starting an AC contactor to start the accident fan. Meanwhile, the fan indicator lamp is lightened, the fan button is pressed again, the fan stops, and the indicator lamp is turned off.

In an automatic state, the gas alarm host inputs a switching value signal, and also starts 12v pulse output to cut off the household valve.

Under the automatic state, the household alarm can output 12v pulse signals to the control panel when giving an alarm, and the control panel can start all output signals and carry out self-locking after receiving the pulse signals. The reset button is pressed to reset.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a gas leakage warning linkage case, its characterized in that, comprises a box body, install power indicator, manual automatic switch, valve accuse button and fan start button on the box, install control circuit board in the box, the last a plurality of interfaces that are provided with of control circuit board, control circuit board include the singlechip, the singlechip is connected with power module, input module and output module respectively, and control circuit board still is connected with earth leakage protection switch, DC power supply and ac contactor respectively.

2. The gas leakage alarm linkage box according to claim 1, wherein the input module is connected with an active input module and a passive input module respectively.

3. The gas leakage alarm linkage box according to claim 1, wherein the output module is connected with a triode control module, a relay control module and a field effect transistor respectively.

4. The gas leakage alarm linkage box according to claim 1, wherein the box body is further connected with an audible and visual alarm, and the audible and visual alarm is electrically connected with the control circuit board.

5. The gas leakage alarm linkage box according to claim 1, wherein the control circuit board is provided with a 220V ac input interface, a 24V dc input interface, a 12V pulse input interface, a low alarm automatic input interface, a low alarm manual input interface, a high alarm manual input interface, a low alarm indicator output interface, a power indicator output interface, a manual-automatic switching input interface, a 12V pulse output interface, a low alarm passive output interface, a low alarm active 24V output interface, a low alarm 220V ac output interface, a high alarm 220V normally closed output interface, a high alarm 220V pulse output interface and a program download interface.