CN111199633A

CN111199633A - Household gas leakage detection system

Info

Publication number: CN111199633A
Application number: CN202010037208.6A
Authority: CN
Inventors: 阳明君; 李兴杰; 彭峰; 王超; 杨思; 张嘉洪; 吴桐; 李乐
Original assignee: Sichuan University of Science and Engineering
Current assignee: Sichuan University of Science and Engineering
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-05-26

Abstract

The invention discloses a household gas leakage detection system, and belongs to the field of gas detection. The household gas leakage detection system comprises a control unit, an electromagnetic valve and a power supply module for supplying power, wherein the control unit is respectively connected with a gas detection sensor and an alarm unit; the electromagnetic valve comprises a box body, a spring and an electromagnet connected with the control unit are mounted on the first inner wall of the box body, and the electromagnet is positioned in the spring; a sliding rail is arranged on the second inner wall of the box body, a rack which slides along the sliding rail and is matched with the spring is arranged on the sliding rail, the rack is made of a magnetic-philic metal, a limiting block matched with the rack is arranged in the box body, a gear is meshed with the rack, a valve rod extending out of the box body is arranged on the gear, a limiting bearing matched with the valve rod is arranged on the box body, and a valve body which is positioned in the gas pipeline and is matched with the gas pipeline is arranged at the other end of the valve rod; the power module comprises a button for controlling the electromagnet to be electrified.

Description

Household gas leakage detection system

Technical Field

The invention relates to the field of gas detection, in particular to a household gas leakage detection system.

Background

At present, many families use gas, and the gas safety directly concerns the personal safety of related personnel and the property safety of related equipment.

Disclosure of Invention

In view of the above-mentioned deficiencies in the prior art, the present invention aims to provide a household gas leakage detection system, which can detect gas leakage in time and block gas from continuing to leak in time.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that:

the household gas leakage detection system comprises a control unit, an electromagnetic valve and a power supply module for supplying power, wherein the control unit is respectively connected with a gas detection sensor and an alarm unit; the electromagnetic valve comprises a box body, a spring and an electromagnet connected with the control unit are mounted on the first inner wall of the box body, and the electromagnet is positioned in the spring; a sliding rail is arranged on the second inner wall of the box body, a rack which slides along the sliding rail and is matched with the spring is arranged on the sliding rail, the rack is made of a magnetic-philic metal, a limiting block matched with the rack is arranged in the box body, a gear is meshed with the rack, a valve rod extending out of the box body is arranged on the gear, a limiting bearing matched with the valve rod is arranged on the box body, and a valve body which is positioned in the gas pipeline and is matched with the gas pipeline is arranged at the other end of the valve rod; the power module comprises a button for controlling the electromagnet to be electrified.

Further, the device also comprises an exhaust fan connected with the control unit.

Further, the alarm unit comprises an audible and visual alarm.

Further, the control unit comprises a display device for displaying the gas concentration.

Further, the control unit comprises a single chip microcomputer of STC89C52 type, and the single chip microcomputer is connected with the gas detection sensor through an A/D module.

Further, the model of the A/D module is ADC 0809.

Furthermore, the model of the gas detection sensor is MQ-2.

Furthermore, an explosion-proof safety grid is arranged between the control unit and the gas detection sensor.

The invention has the beneficial effects that:

under normal state, the electromagnet is powered on, the rack compresses the spring under the action of the electromagnet and abuts against the electromagnet, the valve body is in an open state, and the coal gas can flow in the coal gas pipeline. When the concentration acquired by the gas detection sensor exceeds a first concentration threshold value preset in the control unit, the control unit controls the alarm unit to give an alarm and controls the electromagnet to lose power, under the action of the spring and the limiting block, the rack moves away from the electromagnet along the sliding rail for a set distance in a linear motion manner, and then the gear and the valve rod are driven to rotate for a set angle by taking the central line of the valve rod as a rotating shaft, so that the valve body is driven to rotate synchronously for a set angle to close a gas pipeline, and the blocking of gas leakage is realized.

When a user finds that the gas leaks and takes corresponding measures under the prompt of the alarm unit, the button is manually pressed to enable the electromagnet to be electrified, the rack compresses the spring under the action of the electromagnet and abuts against the electromagnet, the valve body is in an open state, and the gas can circulate in the gas pipeline, so that the household gas leakage detection system is recovered to a normal state (namely a detection state).

Drawings

Fig. 1 is a schematic partial structural view of a valve body and a gas pipeline in a normal state according to an embodiment of the present invention;

fig. 2 is a schematic diagram of the household gas leakage detection system shown in the figure.

Wherein, 1, electromagnet; 2. a box body; 3. a spring; 4. a rack; 5. a gear; 6. a valve body; 7. a gas pipeline; 8. a valve stem.

Detailed Description

The following detailed description of the present invention will be provided in conjunction with the accompanying drawings to facilitate the understanding of the present invention by those skilled in the art. It should be understood that the embodiments described below are only some embodiments of the invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step, without departing from the spirit and scope of the present invention as defined and defined by the appended claims, fall within the scope of protection of the present invention.

As shown in fig. 1 and 2, the household gas leakage detection system comprises a control unit, an electromagnetic valve and a power supply module for supplying power, wherein the control unit is respectively connected with a gas detection sensor and an alarm unit; the electromagnetic valve comprises a box body 2, a spring 3 and an electromagnet 1 connected with a control unit are mounted on a first inner wall of the box body 2, the electromagnet 1 is located in the spring 3, a slide rail is mounted on a second inner wall of the box body 2, a rack 4 which slides along the slide rail and is matched with the spring 3 is mounted on the slide rail, the rack 4 is made of a magnetic-philic metal, a limiting block matched with the rack 4 is arranged in the box body 2, a gear 5 is meshed with the rack 4, a valve rod 8 extending out of the box body 2 is mounted on the gear 5, a limiting bearing matched with the valve rod 8 is mounted on the box body 2, and a valve body 6 (the valve body 6 and the gas pipeline 7 are in dynamic sealing) which is located in the gas pipeline 7 and is matched with; the power module comprises a button for controlling the electromagnet 1 to be powered.

When the system is implemented, the system preferably further comprises an exhaust fan connected with the control unit. When the concentration acquired by the coal gas detection sensor exceeds a first concentration threshold value preset in the control unit, the control unit controls the exhaust fan to be powered on, so that the discharge of coal gas in indoor air is accelerated. When the concentration acquired by the coal gas detection sensor is lower than a second concentration threshold value (the second concentration threshold value is smaller than the first concentration threshold value) preset in the control unit, the control unit controls the exhaust fan to lose power, and therefore energy consumption is saved.

The alarm unit comprises an audible and visual alarm, so that a user can find the occurrence of the gas leakage condition earlier, and the occurrence of larger accidents is avoided. The control unit comprises a display device for displaying the gas concentration, so that a user can clearly know the gas concentration in the air. The control unit comprises a singlechip of STC89C52 type, the singlechip is connected with the gas detection sensor through an A/D module, and the A/D module converts an analog signal sent by the gas detection sensor into a digital signal and transmits the digital signal to the singlechip. Specifically, the model of the A/D module is ADC0809, and the model of the gas detection sensor is MQ-2.

In another embodiment, an explosion-proof safety barrier is arranged between the control unit and the gas detection sensor to prevent the electric spark from contacting the gas to explode when the concentration is higher than an explosion point due to sudden and large gas leakage.

Claims

1. The household gas leakage detection system is characterized by comprising a control unit, an electromagnetic valve and a power supply module for supplying power, wherein the control unit is respectively connected with a gas detection sensor and an alarm unit; the electromagnetic valve comprises a box body (2), a spring (3) and an electromagnet (1) connected with a control unit are mounted on a first inner wall of the box body (2), and the electromagnet (1) is located in the spring (3); a sliding rail is mounted on the second inner wall of the box body (2), a rack (4) which slides along the sliding rail and is matched with the spring (3) is mounted on the sliding rail, the rack (4) is made of a magnetic-attracting metal, a limiting block matched with the rack (4) is arranged in the box body (2), a gear (5) is meshed on the rack (4), a valve rod (8) extending out of the box body (2) is mounted on the gear (5), a limiting bearing matched with the valve rod (8) is mounted on the box body (2), and a valve body (6) which is positioned in the gas pipeline (7) and is matched with the gas pipeline (7) is mounted at the other end of the valve rod (8); the power module comprises a button for controlling the electromagnet (1) to be electrified.

2. The home gas leak detection system according to claim 1, further comprising an exhaust fan connected to the control unit.

3. A home gas leak detection system according to claim 1, wherein the alarm unit comprises an audible and visual alarm.

4. The home gas leak detection system according to claim 1, wherein the control unit comprises a display device for displaying gas concentration.

5. The home gas leak detection system of claim 1, wherein the control unit comprises a single chip microcomputer of STC89C52 type, and the single chip microcomputer is connected with the gas detection sensor through an A/D module.

6. The home gas leak detection system according to claim 5, wherein the A/D module is model number ADC 0809.

7. The home gas leak detection system according to claim 1, wherein the gas detection sensor is of type MQ-2.

8. The household gas leakage detection system according to claim 1, wherein an explosion-proof safety barrier is arranged between the control unit and the gas detection sensor.