CN210606010U

CN210606010U - Household gas alarm

Info

Publication number: CN210606010U
Application number: CN201921762697.0U
Authority: CN
Inventors: 谭咸发; 饶太波; 刘钊; 谭慕秋
Original assignee: Lizhi Beijing Technology Development Co Ltd
Current assignee: Lizhi Beijing Technology Development Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-05-22
Anticipated expiration: 2029-10-21

Abstract

The utility model discloses a household gas alarm, which comprises a main valve and a stop valve which are sequentially arranged on a gas pipeline; the cut-off valve is electrically connected to an alarm; the gas pipeline is also provided with a gas flow switch; the gas flow switch is arranged on one side far away from the main valve; the gas flow switch is also electrically connected to the active gas monitor; the active gas monitor is electrically connected to the alarm. The utility model discloses a household gas alarm, when the gas pipeline was closed, passive form lasted the detection, and when the gas pipeline was opened, passive form and active synchronous monitoring, its monitoring accuracy was high, and gas leakage reaction time is short.

Description

Household gas alarm

Technical Field

The utility model relates to a gas alarm, concretely relates to household gas alarm belongs to gas alarm technical field.

Background

The gas alarm is a detector for detecting the concentration of gas, the core original component of the gas alarm is a gas sensor, the gas alarm is installed in a place where gas leakage is possible, the detector is triggered to alarm when the concentration of the gas in the air exceeds a set value, and sends out an audible and visual alarm signal to the outside, if the gas alarm is connected with an alarm host and an alarm receiving center, networking alarm can be carried out, meanwhile, air exhaust equipment can be automatically started, a gas pipeline valve can be closed, and the like, so that the safety of life and property is guaranteed; in civil safety precaution engineering, the household gas leakage alarm is mainly used for household gas leakage alarm, the existing household gas supply is generally realized by gas pipe network gas supply or liquefied gas cylinder gas supply laid by gas companies, therefore, the household gas alarm is generally installed in indoor gas supply places, the existing household gas alarm generally consists of an alarm and a cut-off valve, a gas sensor is arranged at an air inlet grid at the inner side of the alarm, the gas sensor sends a collected signal to the alarm, after the alarm monitors an alarm signal, a pipeline is directly cut off through the cut-off valve, and meanwhile, the alarm gives an audible and visual alarm; however, the gas monitoring of the household gas alarm in the prior art is passive monitoring, and the installation position directly affects the monitoring effect, so that the monitoring effect is general.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a household gas alarm adopts passive form and active double-circuit monitoring, and monitoring effect is good.

The utility model discloses a household gas alarm, the monitoring mode is based on the existing trip valve and alarm structure, incorporate active monitoring structure, active monitoring structure adopts the monitoring when the air feed, stop monitoring when shutting off, it is more energy-concerving and environment-protective, and monitoring accuracy is higher, can be to cooking utensil or other can kneck leak gas, and the quick detection feedback of leaking gas after the cooking utensil is put out a fire, thus can shorten warning and shutoff time, active monitoring its switch triggers through the gas flow switch installed on the gas pipeline, when there is gas to flow in the pipeline (the pressure in the pipeline is higher than the set threshold value), gas flow switch gives the active gas monitor switching signal, suction fan and the gas sensor of the inboard of active gas monitor are electrified to work, the suction fan sends the gas after filtering to the gas sensor, the gas sensor sends the acquisition signal to the controller on the circuit board, the controller carries out digital processing and threshold value judgment, when the threshold value is exceeded, a trigger signal is sent to the alarm, the alarm carries out alarming and action of a cut-off valve, when no gas flows through the gas pipeline, a gas flow switch sends a closing signal to the active gas monitor, the whole active monitoring structure is in a standby state, and at the moment, the whole alarm is in a passive monitoring structure; the utility model discloses a domestic gas alarm concrete structure as follows: comprises a main valve and a stop valve which are sequentially arranged on a gas pipeline; the cut-off valve is electrically connected to an alarm; the gas pipeline is also provided with a gas flow switch; the gas flow switch is arranged on one side far away from the main valve; the gas flow switch is also electrically connected to the active gas monitor; the active gas monitor is electrically connected to the alarm; the active gas monitor gives a high-level signal or a low-level signal to a controller in the alarm, the controller directly acquires an external interface from the active gas monitor, and controls alarm processing after performing NAND gate logic calculation on the external interface signal and a control signal output by the controller; or the output control signal end of the controller and the output signal end of the active gas monitor are connected with a NAND gate and are connected to the control signal ends of the audible and visual alarm and the cut-off valve through the output end of the NAND gate.

Furthermore, the active gas monitor comprises a cavity seat, and a side bin is arranged on one side of the cavity seat; an inner ring seat is arranged in the middle of the inner side of the cavity seat; a miniature exhaust fan is fixed on the inner ring seat; an exhaust grille is arranged at the top of the cavity seat; a plurality of layers of filter screens are arranged at the inlet of the miniature exhaust fan at the inner side of the cavity seat; a gas monitoring module is arranged at the outlet of the miniature exhaust fan on the inner side of the cavity seat; the miniature exhaust fan and the gas monitoring module are electrically connected to the circuit board on the inner side of the side bin; the circuit board is electrically connected to the alarm and the gas flow switch; the controller that sets up on the circuit board passes through the miniature air exhauster switch of relay control, through control coal gas monitoring module (gas sensor) high-low level control coal gas monitoring module switch, its circuit structure of coal gas monitoring module and controller and working process are current gas alarm universal module, its concrete circuit structure and theory of operation are not elaborated herein again, in addition, it carries out the pressure differential comparison to the gas flow switch, it is equivalent to a comparator, its output result of gas flow switch is high-low level, it adopts the border to trigger or high-low level to trigger can accomplish signal detection to the controller on the circuit board, thereby judge whether open miniature air exhauster and coal gas monitoring module.

Preferably, the gas flow switch is a differential pressure type flow switch; the differential pressure type flow switch is arranged in a gas pipeline, and the flow in the monitoring system is installed in an online or plug-in mode; when the gas flow is higher or lower than a certain set point, a high-low level signal is triggered and output to be transmitted to the unit, and the system can make corresponding action after acquiring the signal.

Preferably, the alarm is fixed on a wall between the inlet of the gas pipe network and the energy utilization terminal; the active gas monitor is fixed on the side of the energy utilization terminal.

Further, the gas flow switch is connected to the active gas monitor by wire or wireless; the active gas monitor is connected to the alarm through a wire or a wireless way; when the wired connection is adopted, common ground processing is required, and when the wireless connection is adopted, an infrared transceiving module is preferentially adopted.

Compared with the prior art, the utility model discloses a household gas alarm, when the gas pipeline was closed, passive form lasted the detection, and when the gas pipeline was opened, passive form and active synchronous monitoring, its monitoring accuracy was high, and gas leakage reaction time is short.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a block diagram of the system modules of the present invention.

Detailed Description

Example 1:

the household gas alarm as shown in fig. 1 and fig. 2, which is based on the existing cut-off valve and alarm structure, is incorporated with an active monitoring structure, which monitors when gas is supplied and stops monitoring when the gas is turned off, is more energy-saving and environment-friendly, has higher monitoring precision, can quickly detect and feed back gas leakage at the interface of a cooker or other energy consumption devices and gas leakage after the cooker is put out of fire, thereby shortening the time for alarming and turning off, actively monitors the switch of the gas alarm to be triggered by a gas flow switch arranged on a gas pipeline, when gas flows through the pipeline (the pressure in the pipeline is higher than a set threshold value), the gas flow switch gives a switching signal to the active gas monitor, a suction fan and a gas sensor on the inner side of the active gas monitor are electrified to work, the suction fan sends the filtered gas to the gas sensor, and the gas sensor sends a collecting signal to a controller on a circuit board, the controller carries out digital processing and threshold value judgment, when the threshold value is exceeded, a trigger signal is sent to the alarm, the alarm carries out alarming and action of a cut-off valve, when no gas flows through the gas pipeline, a gas flow switch sends a closing signal to the active gas monitor, the whole active monitoring structure is in a standby state, and at the moment, the whole alarm is in a passive monitoring structure; the utility model discloses a domestic gas alarm concrete structure as follows: comprises a main valve 1 and a stop valve 2 which are sequentially arranged on a gas pipeline; the cut-off valve 2 is electrically connected to an alarm 3; the gas pipeline is also provided with a gas flow switch 4; the gas flow switch 4 is arranged on one side far away from the main valve 1; the gas flow switch 4 is also electrically connected to an active gas monitor 5; the active gas monitor 5 is electrically connected to the alarm 3; the active gas monitor gives a high-level signal or a low-level signal to a controller in the alarm, the controller directly acquires an external interface from the active gas monitor, and controls alarm processing after performing NAND gate logic calculation on the external interface signal and a control signal output by the controller; or the output control signal end of the controller and the output signal end of the active gas monitor are connected with a NAND gate and are connected to the control signal ends of the audible and visual alarm and the cut-off valve through the output end of the NAND gate.

The active gas monitor 5 comprises a cavity seat 6, and a side bin 7 is arranged on one side of the cavity seat 6; an inner ring seat 8 is arranged in the middle of the inner side of the cavity seat 6; a miniature exhaust fan 9 is fixed on the inner ring seat 8; the top of the cavity seat 6 is provided with an exhaust grille 10; a plurality of layers of filter screens 11 are arranged at the inlet of the miniature exhaust fan at the inner side of the cavity seat 6; a gas monitoring module 12 is arranged at the outlet of the miniature exhaust fan at the inner side of the cavity seat 6; the miniature exhaust fan 9 and the gas monitoring module 12 are electrically connected to a circuit board 13 on the inner side of the side bin; the circuit board 13 is electrically connected to the alarm 3 and the gas flow switch 4; the controller that sets up on the circuit board passes through the miniature air exhauster switch of relay control, through control coal gas monitoring module (gas sensor) high-low level control coal gas monitoring module switch, its circuit structure of coal gas monitoring module and controller and working process are current gas alarm universal module, its concrete circuit structure and theory of operation are not elaborated herein again, in addition, it carries out the pressure differential comparison to the gas flow switch, it is equivalent to a comparator, its output result of gas flow switch is high-low level, it adopts the border to trigger or high-low level to trigger can accomplish signal detection to the controller on the circuit board, thereby judge whether open miniature air exhauster and coal gas monitoring module.

Wherein, the gas flow switch 4 is a differential pressure type flow switch; the differential pressure type flow switch is arranged in a gas pipeline, and the flow in the monitoring system is installed in an online or plug-in mode; when the gas flow is higher or lower than a certain set point, a high-low level signal is triggered and output to be transmitted to the unit, and the system can make corresponding action after acquiring the signal.

The alarm 3 is fixed on a wall between a gas pipe network inlet and an energy utilization terminal; the active gas monitor 5 is fixed on the side of the energy utilization terminal.

Wherein the gas flow switch 4 is connected to the active gas monitor 5 by wire or wirelessly; the active gas monitor 5 is connected to the alarm 3 through a wire or a wireless; when the wired connection is adopted, common ground processing is required, and when the wireless connection is adopted, an infrared transceiving module is preferentially adopted.

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

1. A household gas alarm comprises a main valve and a stop valve which are sequentially arranged on a gas pipeline; the cut-off valve is electrically connected to an alarm; the method is characterized in that: the gas pipeline is also provided with a gas flow switch; the gas flow switch is arranged on one side far away from the main valve; the gas flow switch is also electrically connected to the active gas monitor; the active gas monitor is electrically connected to the alarm.

2. A household gas alarm as claimed in claim 1, wherein: the active gas monitor comprises a cavity seat, and a side bin is arranged on one side of the cavity seat; an inner ring seat is arranged in the middle of the inner side of the cavity seat; a miniature exhaust fan is fixed on the inner ring seat; an exhaust grille is arranged at the top of the cavity seat; a plurality of layers of filter screens are arranged at the inlet of the miniature exhaust fan at the inner side of the cavity seat; a gas monitoring module is arranged at the outlet of the miniature exhaust fan on the inner side of the cavity seat; the miniature exhaust fan and the gas monitoring module are electrically connected to the circuit board on the inner side of the side bin; the circuit board is electrically connected to the alarm and the gas flow switch.

3. A household gas alarm as claimed in claim 1, wherein: the gas flow switch is a differential pressure type flow switch.

4. A household gas alarm as claimed in claim 1, wherein: the alarm is fixed on a wall between the inlet of the gas pipe network and the energy utilization terminal; the active gas monitor is fixed on the side of the energy utilization terminal.

5. A household gas alarm as claimed in claim 1, wherein: the gas flow switch is connected to the active gas monitor through a wire or a wireless way; the active gas monitor is connected to the alarm through a wire or a wireless.