Natural gas leakage detection device

Abstract

The utility model discloses a natural gas leakage detection device, which comprises a gas valve and one or more detectors connected with the gas valve, the gas valve comprises an electromagnetic valve arranged on a gas supply pipeline, and each detector comprises a box body and a second gas detection sensor arranged in the box body. One or more detectors are arranged in corresponding positions of a place, after the detectors detect natural gas leakage, leakage signals are sent to a gas valve, and the gas valve cuts off gas supply through an electromagnetic valve and stops continuous supply of natural gas; and a plurality of positions in a place can be monitored at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas leakage detection, in particular to a natural gas leakage detection device. Background Art

[0002] Natural gas has been used in all fields of households, factories and businesses, and various communities and parks are also carrying out various aspects of education and warnings on the safe use of natural gas. However, during the natural gas supply and the installation of natural gas stoves, there is no natural gas leak detection device. When using natural gas, users usually only keep the place of use ventilated.

[0003] However, in cold weather or when ventilation is limited, it is difficult to maintain ventilation, which poses a potential safety hazard. Therefore, natural gas leak detection devices have gradually become recommended products. Currently, natural gas leak detection devices on the market can only detect leaks in a local area, and cannot perform simultaneous detection of multiple locations, nor can they cut off the natural gas supply in time after detecting a leak. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, the utility model provides a natural gas leakage detection device.

[0005] The utility model discloses a natural gas leakage detection device, comprising a gas valve and one or more detectors connected to the gas valve. The gas valve comprises a solenoid valve installed on a gas supply pipeline, and the detector comprises a box body and a second gas detection sensor installed in the box body.

[0006] Preferably, the box body is provided with a vent hole and an indicator light.

[0007] Preferably, the detector further comprises a second controller, a second alarm and a second transmission module which are arranged in the box body, and the second controller is respectively connected to the second transmission module, the second gas detection sensor, the second alarm and the indicator light.

[0008] Preferably, the gas valve comprises a main valve body, a solenoid valve and a detection line.

[0009] The solenoid valve and the detection line are respectively installed on the main valve body.

[0010] A first joint is provided at one end of the main valve body.

[0011] The first connector is provided with a threading hole, and the detection line passes through the threading hole and is connected with an external connector installed on the first connector.

[0012] Preferably, the gas valve further comprises a detection resistor and a detection circuit, wherein both ends of the detection resistor are respectively connected to a detection line, and the detection circuit is connected to both ends of the detection resistor.

[0013] Preferably, the gas valve further includes a first controller, and any one of the following components or a combination thereof:

[0014] control switch, first alarm, first gas detection sensor and first transmission module,

[0015] The first controller is connected to the component, and the first transmission module is connected to a host computer.

[0016] Preferably, the first transmission module is connected to the second transmission module via Bluetooth, 5G or 4G.

[0017] Preferably, the gas valve further comprises a control box, the main valve body is provided with a first mounting seat, the first mounting seat is provided with a valve seat, and the control box is mounted on the first mounting seat.

[0018] The solenoid valve is mounted on a valve seat inside the control box.

[0019] Preferably, a detachable box cover is provided on the upper side of the control box, a handle is provided on the box cover, an inner mounting seat is provided on the lower side of the control box, an alarm mounting seat is provided on the inner mounting seat, and the alarm is mounted on the alarm mounting seat.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows: one or more detectors are arranged in corresponding positions of the venue. After the detector detects natural gas leakage, the leakage signal is sent to the gas valve. The gas valve cuts off the gas supply through the solenoid valve to stop the continued supply of natural gas; multiple positions in the venue can be monitored simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a natural gas leakage detection device of the utility model;

[0022] Figure 2 It is the logic block diagram of the natural gas leak detection device;

[0023] Figure 3 It is a schematic diagram of the structure of a natural gas valve;

[0024] Figure 4 It is a structural diagram of the main valve body;

[0025] Figure 5 This is the installation diagram of the external connector;

[0026] Figure 6 This is a schematic diagram of the installation of the connecting wire.

[0027] Markings in the figure: 1 control box, 12 box cover, 13 handle, 15 inner mounting seat, 16 alarm mounting seat, 2 main valve body, 21 first joint, 22 threading hole, 25 first mounting seat, 26 valve seat,

[0028] 3 first controller, 31 control switch, 32 solenoid valve, 33 first gas detection sensor, 34 first transmission module, 36 first alarm, 37 detection circuit, 38 controllable switch, R1 detection resistor, 39 battery,

[0029] 4 external connector, 41 insulating seat, 42 connecting piece, 43 connecting groove, 45 detection line, 5 gas valve,

[0030] 6 Host computer;

[0031] 7 detector, 71 vent hole, 72 indicator light, 73 second controller, 74 second gas detection sensor, 75 second transmission module, 76 second alarm, 77 box body. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] The utility model is further described in detail below in conjunction with the accompanying drawings:

[0034] A natural gas leak detection device, such as Figure 1-6 As shown, it includes a gas valve 5 and at least one detector 7 connected to the gas valve 5, the gas valve 5 includes a solenoid valve 32 installed on the gas supply pipeline, and the detector 7 includes a box body 77 and a second gas detection sensor 74 installed in the box body 77.

[0035] One or more detectors 7 are arranged in corresponding positions of the site. After the detector 7 detects natural gas leakage, it sends a leakage signal to the gas valve 5. The gas valve 5 cuts off the gas supply through the solenoid valve 32 to stop the continued supply of natural gas. Multiple positions in the site can be monitored simultaneously.

[0036] like Figure 1 The box body 77 is provided with a vent hole 71 and an indicator light 72. Figure 2The detector 7 further includes a second controller 73, a second alarm 76 and a second transmission module 75 arranged in a box body 77. The second controller 73 is respectively connected to the second transmission module 75, the second gas detection sensor 74, the second alarm 76 and the indicator light 72. The box body 77 is also provided with a corresponding circuit board and a battery. The circuit board is used to carry components such as the second controller, and the battery provides power for each component.

[0037] Among them, Figure 3-6 The gas valve 5 includes a main valve body 2, a solenoid valve 32 and a detection line 45. The solenoid valve 32 and the detection line 45 are respectively installed on the main valve body 2. A first joint 21 is provided at one end of the main valve body 2. A threading hole 22 is provided on the first joint 21. The detection line 45 passes through the threading hole 22 and is connected to the external joint 4 installed on the first joint 21.

[0038] After the detection line 45 is installed to the external connector 4, when the external connector is removed from the first connector 21, the detection line 45 and the external connector 4 will be disconnected, the connection will be changed, or the detection line will be broken, thereby achieving an anti-dismantling effect; the unauthorized modification of the gas valve can be discovered or avoided in time, thereby avoiding potential gas leakage hazards or the risk of gas theft.

[0039] The gas valve can be installed at the input end and / or output end of the gas meter. The solenoid valve 32 can be replaced by a pneumatic valve or an electric valve, such as a throttle valve, an electric valve, etc.

[0040] The gas valve 5 also includes a detection resistor R1 and a detection circuit 37. The two ends of the detection resistor R1 are respectively connected to a detection line 45, and the detection circuit 37 is connected to the two ends of the detection resistor R1. The detection circuit 37 is used to detect the voltage value or current value of the detection resistor R1, and judge whether the detection line is broken, disconnected or changed by detecting the change of the voltage value or current value. The detection resistor R1 is used to divide the voltage and reduce the current of the detection line to reduce power consumption.

[0041] Figure 2 Also shown are a first controller 3, and any of the following components or their combination: a control switch 31, a first alarm 36, a first gas detection sensor 33 and a first transmission module 34, wherein the first controller 3 is connected to the components, and the first transmission module 34 is also connected to the host computer 6, wherein the first transmission module can adopt wireless transmission, such as Bluetooth, NB, 4G, 5G, etc.; or a wired connection can be adopted.

[0042] The control switch 31 is used to control the solenoid valve 32. The solenoid valve 32 can be a normally closed solenoid valve. When the power is off, the solenoid valve 32 remains closed. The first controller 3 can open or close the solenoid valve according to the signal of the control switch 31; but it is not limited to this. For example, the control switch 31 can also be electrically connected to the solenoid valve 32.

[0043] The first alarm 36 is used to generate sound or light alarms, the first gas detection sensor 33 is used to detect gas in the air, and a methane sensor can be used, etc. The first transmission module 34 is used to upload the detection data or alarm signal to the host computer 6 or the server, so that the management personnel can find gas risks in time. The controller can be a microcontroller such as ARM or STM32, but is not limited thereto.

[0044] The gas valve 5 further includes a controllable switch 38, the control end of which is connected to the first controller 3, one end of the detection resistor R1 is connected to the detection line 45 through the controllable switch 38, and the detection line 45 is connected to the external connector. The controllable switch 38 is used to control the power supply of the detection line. In the first specific embodiment, the controllable switch 38 can be a relay, the two electrodes of the battery 39 are connected to the input end of the controllable switch 38, one output end of the controllable switch 38 is connected to one end of the detection resistor, and the other output end is connected to a detection line 45. In the second specific embodiment, the controllable switch 38 can be a controllable switch device such as MOS, IGBT, one electrode of the battery 39 is connected to one end of the detection resistor R1 through the controllable switch device, and the other electrode is connected to the external connector 4 through the detection line 45. However, the connection method of the controllable switch 38 is not limited thereto.

[0045] The main valve body 2 is provided with a first mounting seat 25 , and the first mounting seat 25 is provided with a valve seat 26 . The control box 1 is mounted on the first mounting seat 25 , and the solenoid valve 32 is mounted on the valve seat 26 inside the control box 1 .

[0046] The control box 1 is provided with a detachable box cover 12 on the upper side, and a handle 13 is provided on the box cover 12 . The control box is provided with an inner mounting seat 15 on the lower side, and an alarm mounting seat 16 is provided on the inner mounting seat 15 . The first alarm 36 is mounted on the alarm mounting seat 16 .

[0047] The first joints 21 at both ends of the main valve body 2 can be installed with detection lines, that is, the illegal removal of the upstream first joint 21 and the downstream second joint 21 can be monitored respectively.

[0048] The threading hole 22 can hide the detection line 45 to prevent the detection line 45 from accidentally breaking. A connection groove 43 is provided between the first connector 21 and the external connector 4, and the connection groove 43 covers the detection line 45 through a lead seal layer or a glue seal layer. During the modification process, damaging the lead seal layer or the glue seal layer will cause the detection line to break.

[0049] More specifically, an insulating seat 41 is provided on the external connector 4, and at least one connector 42 is provided on the insulating seat 41. The connector 42 at a suitable position can be selected to install the detection line, and one end of the detection line 45 is installed on the connector 42; the connection strength between the detection line 45 and the connector 42 is less than the connection strength between the insulating seat 41 and the external connector 4, so as to avoid the insulation seat 41 and the external connector 4 from falling off, wherein the lead seal layer or the glue seal layer can cover the insulating seat. The detection line 45 is isolated by the insulating seat to avoid the entire external connector 4 from being energized, thereby improving safety and reducing energy consumption. It is also possible to seal the exposed section of the detection line 45 and the connector 42 with a glue seal layer, and then seal the connection groove 43 with a lead seal layer, so as to facilitate the installation of the detection line 45.

[0050] Among them, the first detection method of the utility model includes:

[0051] Step 101: Determine whether the signal of any of the following components is abnormal: detection line / detection resistor / detection circuit, first gas detection sensor, second gas detection sensor.

[0052] If yes, execute step 102: send an alarm to the user or administrator via the first alarm device, the second alarm device or the transmission module.

[0053] If not, continue to monitor the signal.

[0054] Step 103: The solenoid valve is closed and locked through the first controller or according to instructions received from the management personnel.

[0055] The second detection method of the utility model comprises:

[0056] Step 201: Determine whether the change in the detection signal of the detection circuit exceeds a preset threshold.

[0057] If yes, execute step 202: generate an alarm signal.

[0058] If not, execute step 203: continue to monitor the detection signal of the detection circuit.

[0059] In step 202, the following steps may also be used:

[0060] Step 221: Disconnect the power supply of the detection line through a controllable switch.

[0061] Step 222: Supply power to the detection line through the controllable switch at intervals to obtain a detection signal, for example, 3-10 seconds off and 1 second on.

[0062] Step 223: If the detection change exceeds the preset threshold for more than the second threshold, an alarm message is sent to the management personnel. For example, if the detection change exceeds the preset threshold for 3-7 times in a row, power supply to the detection line may be stopped, that is, the controllable switch is turned off for a long time to stop powering the detection line.

[0063] The gas valve of the utility model can prevent the gas valve and its connected external joint from being illegally modified, and can detect the leakage of gas at the same time, so as to timely find out the safety problems in the use of gas. When a safety problem occurs, on the one hand, the solenoid valve can be manually closed and the gas supply can be stopped through the control switch 31; on the other hand, the alarm information can be sent to the upper computer or server through the transmission module to notify the management personnel or users, so as to solve the safety problem in time.

[0064] The circuit structure of the intelligent gas valve of the utility model can also effectively reduce power consumption and improve battery life; it can avoid direct or indirect electrification in the gas pipeline and improve the safety of use. By arranging detectors 7 at multiple locations in the place to be tested, multiple detectors 7 and the gas valve jointly monitor the gas leakage in the place. If a natural gas leak is found at one location, an alarm is generated and the natural gas supply is cut off in time.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A natural gas leak detection device, characterized in that: comprising a gas valve (5) and at least one detector (7) connected to the gas valve (5), The gas valve (5) comprises a solenoid valve (32) installed on a gas supply pipeline. The detector (7) comprises a box body (77) and a second gas detection sensor (74) installed in the box body (77).

2. The natural gas leak detection device according to claim 1, characterized in that: The box body (77) is provided with a vent hole (71) and an indicator light (72).

3. The natural gas leak detection device according to claim 2, characterized in that: The detector (7) further comprises a second controller (73), a second alarm (76) and a second transmission module (75) arranged in a box body (77). The second controller (73) is respectively connected to the second transmission module (75), the second gas detection sensor (74), the second alarm (76) and the indicator light (72).

4. The natural gas leak detection device according to claim 1, characterized in that: The gas valve comprises a main valve body (2), a solenoid valve (32) and a detection line (45). The solenoid valve (32) and the detection line (45) are respectively installed on the main valve body (2). A first connector (21) is provided at one end of the main valve body (2). The first connector (21) is provided with a threading hole (22), and the detection line (45) passes through the threading hole (22) and is connected to an external connector (4) installed on the first connector (21).

5. The natural gas leak detection device according to claim 4, characterized in that: The gas valve further comprises a detection resistor (R1) and a detection circuit (37), wherein both ends of the detection resistor (R1) are respectively connected to a detection line (45), and the detection circuit (37) is connected to both ends of the detection resistor (R1).

6. The natural gas leakage detection device according to claim 4, characterized in that: The gas valve further comprises a first controller (3), and any one of the following components or a combination thereof: A control switch (31), a first alarm (36), a first gas detection sensor (33) and a first transmission module (34), The first controller (3) is connected to the component, and the first transmission module (34) is connected to the host computer (6).

7. The natural gas leakage detection device according to claim 6, characterized in that: The first transmission module (34) is connected to the second transmission module (75) via NB, Bluetooth, WIFI, 5G or 4G.

8. The natural gas leakage detection device according to claim 5, characterized in that: The gas valve further comprises a control box (1), a first mounting seat (25) is arranged on the main valve body (2), a valve seat (26) is arranged on the first mounting seat (25), and the control box (1) is mounted on the first mounting seat (25). The solenoid valve (32) is mounted on a valve seat (26) inside the control box (1).

9. The natural gas leakage detection device according to claim 8, characterized in that: The control box (1) is provided with a detachable box cover (12) on the upper side, the box cover (12) is provided with a handle (13), the control box is provided with an inner mounting seat (15) on the lower side, an alarm mounting seat (16) is provided on the inner mounting seat (15), and the alarm (36) is mounted on the alarm mounting seat (16).

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