Natural gas leakage prevention device

Abstract

The utility model provides a natural gas leakage prevention device which comprises a gas leakage alarm, an electromagnetic valve, a remote control switch and an exhaust fan, the electromagnetic valve, the remote control switch and the exhaust fan are installed in a natural gas pipeline, the natural gas leakage alarm is electrically connected with the electromagnetic valve and the remote control switch respectively, and the remote control switch is electrically connected with the exhaust fan. The remote control switch comprises a remote control switch emitter and a remote control switch receiver, the remote control switch emitter is electrically connected with the gas leakage alarm, the remote control switch emitter is connected with the remote control switch receiver through wireless communication, and the remote control switch receiver is electrically connected with the exhaust fan. By means of the structure, the gas leakage alarm gives out an alarm after sensing leaked natural gas and sends out an alarm signal to the electromagnetic valve and the remote control switch transmitter, so that the electromagnetic valve is automatically closed, the remote control switch transmitter transmits a signal to the remote control switch receiver, the remote control switch receiver is connected with a power source of the exhaust fan, and the exhaust fan is started. And leaked natural gas is discharged, so that the harmfulness of gas explosion and personnel poisoning is reduced.

Description

Technical Field

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

[0002] With the development of urbanization, natural gas is being used more and more widely. For example, the gas stove used for cooking in the kitchen may cause natural gas leakage, poisoning, explosion and other accidents due to improper operation or poor sealing of the equipment. The hazards caused by natural gas leakage have attracted widespread attention, so it is particularly important to monitor natural gas. There are many gas leak alarm products on the market.

[0003] The signal output end of a traditional gas leak alarm is generally connected to the electromagnetic valve on the natural gas pipeline with a wire. When a natural gas leak occurs, when the concentration of the natural gas reaches the threshold of the gas leak alarm, the gas leak alarm sounds an alarm and outputs a signal to the electromagnetic valve to close the electromagnetic valve, cutting off the natural gas source and preventing the leaked gas from spreading further.

[0004] However, the leaked natural gas has already filled the kitchen before the solenoid valve is closed. When the leaked natural gas needs to be discharged, the exhaust fan in the kitchen needs to be turned on manually, which requires entering the kitchen and contacting the leaked natural gas before the exhaust fan can be turned on by the switch. In this process, the risk of natural gas poisoning to personnel is easily increased, leading to increased safety hazards. Utility Model Content

[0005] The utility model discloses a natural gas leakage prevention device, which mainly solves the problem that when natural gas leaks, it is inconvenient to start the smoke exhaust fan in the kitchen at the same time, which increases the harm of natural gas poisoning to personnel.

[0006] To achieve the above purpose, the technical solution of the present invention is implemented as follows:

[0007] The utility model provides a natural gas leakage prevention device, comprising a gas leakage alarm, a solenoid valve installed in a natural gas pipeline, a remote control switch and an exhaust fan, wherein the natural gas leakage alarm is electrically connected to the solenoid valve and the remote control switch respectively, and the remote control switch is electrically connected to the exhaust fan;

[0008] The remote control switch includes a remote control switch transmitter and a remote control switch receiver, the remote control switch transmitter is electrically connected to the gas leak alarm, the remote control switch transmitter is connected to the remote control switch receiver via wireless communication, and the remote control switch receiver is electrically connected to the exhaust fan;

[0009] The remote control switch transmitter includes a circuit board electrically connected to the gas leak alarm, the circuit board includes a contact switch, a signal transmitter, a remote control circuit and a photoelectric coupling circuit, the contact switch and the signal transmitter are electrically connected to the remote control circuit, the natural gas leak alarm is electrically connected to the contact switch through the photoelectric coupling circuit, the photoelectric coupling circuit includes a photoelectric coupler and a resistor, the output end of the photoelectric coupler is connected in parallel with the contact switch in the remote control circuit, and the gas leak alarm is electrically connected to the input end of the photoelectric coupler through the resistor.

[0010] In one implementation, a rectifier circuit is connected between the resistor and the input end of the photocoupler.

[0011] In one embodiment, the remote control switch receiver includes a signal receiver for receiving signals sent by a signal transmitter, an execution switch and an execution control circuit, the execution switch and the signal receiver are electrically connected to the execution control circuit, and the exhaust fan is electrically connected to the execution control circuit through the execution switch.

[0012] In one embodiment, the wireless communication between the remote control switch transmitter and the remote control switch receiver is low-band radio frequency communication or high-band radio frequency communication.

[0013] In one implementation, the execution switch is a relay.

[0014] In one embodiment, the remote control switch transmitter includes a front shell and a rear shell, the circuit board is installed between the front shell and the rear shell, and a detachable adhesive member is installed on a side of the rear shell away from the front shell, and the adhesive member includes an adhesive cloth with stickiness.

[0015] In one embodiment, two tough strips are mirror-imaged on the rear shell body, a slider is provided at one end of the tough strip, and the other end is connected to the rear shell body through a connecting block, a card block protruding outward is provided on the tough strip, and a fixed body is provided on the adhesive cloth, a first slide groove is provided at a position of the fixed body corresponding to the tough strip, a second slide groove communicating with the first slide groove is provided at a position of the fixed body corresponding to the slider, the tough strip is embedded in the first slide groove, the slider is embedded in the second slide groove, a card groove passes through the position of the first slide groove corresponding to the card block, the card block is embedded in the card groove, and the width of the tough strip is greater than the width of the slider.

[0016] The advantages or beneficial effects of the above technical solution at least include: when a natural gas leak occurs, since the natural gas leak alarm is electrically connected to the solenoid valve and the remote control switch respectively, and the remote control switch is electrically connected to the exhaust fan; the remote control switch includes a remote control switch transmitter and a remote control switch receiver, the remote control switch transmitter is electrically connected to the gas leak alarm, the remote control switch transmitter is connected to the remote control switch receiver through wireless communication, and the remote control switch receiver is electrically connected to the exhaust fan; the remote control switch transmitter includes a circuit board electrically connected to the gas leak alarm, the circuit board includes a contact switch, a signal transmitter, a remote control control circuit and a photoelectric coupling circuit, the contact switch and the signal transmitter are electrically connected in the remote control circuit, and the natural gas leak alarm is connected to the contact switch through the photoelectric coupling circuit. The photoelectric coupling circuit includes a photoelectric coupler and a resistor. The output end of the photoelectric coupler is connected in parallel with the contact switch in the remote control circuit. The gas leak alarm is electrically connected to the input end of the photoelectric coupler through the resistor. Therefore, after the gas leak alarm senses the leaked natural gas, it sounds an alarm and sends an alarm signal to the solenoid valve and the remote control switch transmitter, and the solenoid valve is automatically closed. After the photoelectric coupling circuit of the remote control switch transmitter receives the signal, the contact switch is turned on, and then the signal transmitter sends a signal to the remote control switch receiver through the remote control circuit. After the remote control switch receiver receives the signal, the power of the exhaust fan is turned on to discharge the leaked natural gas to achieve automatic exhaust and reduce the hazards of gas explosion and poisoning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings illustrate exemplary embodiments of the present invention and are used to explain the principles of the present invention together with the description. These drawings are included to provide a further understanding of the present invention, and the drawings are included in and constitute a part of this specification.

[0018] Figure 1 A circuit diagram of a natural gas leakage prevention device according to an exemplary embodiment of the utility model is shown;

[0019] Figure 2 A schematic diagram of a circuit board according to an exemplary embodiment of the utility model is shown;

[0020] Figure 3 A schematic diagram of a circuit principle of a photoelectric coupling circuit according to an exemplary embodiment of the utility model is shown;

[0021] Figure 4 A schematic diagram of the circuit principle structure of a remote control switch receiver according to an exemplary embodiment of the utility model is shown;

[0022] Figure 5 A schematic diagram of the exploded structure of a remote control switch transmitter according to an exemplary embodiment of the utility model is shown;

[0023] Figure 6 A schematic structural diagram of a rear housing according to an exemplary embodiment of the utility model is shown;

[0024] Figure 7 A schematic structural diagram of a sticky cloth according to an exemplary embodiment of the utility model is shown.

[0025] Description of reference numerals:

[0026] 1. Gas leak alarm;

[0027] 2. Solenoid valve;

[0028] 3. Remote control switch;

[0029] 4. Exhaust fan;

[0030] 5. Remote control switch transmitter;

[0031] 51. Front housing;

[0032] 52, circuit board; 521, contact switch; 522, signal transmitter; 523, remote control circuit; 524, photoelectric coupling circuit; 5241, photoelectric coupler; 5242, resistor; 525, light emitting transistor;

[0033] 53, rear housing; 531, toughness strip; 532, slider; 533, connecting block; 534, clamping block;

[0034] 54, adhesive member; 541, adhesive cloth; 542, fixed body; 543, first slide groove; 544, second slide groove; 545, card slot;

[0035] 6. Remote control switch receiver;

[0036] 61. Signal receiver;

[0037] 62. Execute switch;

[0038] 63. Execution control circuit. DETAILED DESCRIPTION

[0039] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0040] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in the present utility model are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0042] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0043] The names of the messages or information exchanged between multiple devices in the implementation manner of the present utility model are only used for illustrative purposes, and are not used to limit the scope of these messages or information.

[0044] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the utility model provides a natural gas leakage prevention device, comprising a gas leakage alarm 1, a solenoid valve 2 installed in a natural gas pipeline, a remote control switch 3 and an exhaust fan 4, wherein the natural gas leakage alarm 1 is electrically connected to the solenoid valve 2 and the remote control switch 3 respectively, and the remote control switch 3 is electrically connected to the exhaust fan 4; wherein the gas leakage alarm 1 can select an existing gas leakage alarm, when the gas reaches a preset concentration, the gas leakage alarm emits an alarm sound, and can send an alarm signal to the solenoid valve 2 and the remote control switch 3; the solenoid valve 2 can select an existing solenoid valve that can automatically close the valve after power is supplied; the exhaust fan 4 can select an exhaust fan that has been installed in an existing kitchen.

[0045] The remote control switch 3 includes a remote control switch transmitter 5 and a remote control switch receiver 6. The remote control switch transmitter 5 is electrically connected to the gas leak alarm 1. The remote control switch transmitter 5 is connected to the remote control switch receiver 6 through wireless communication. The remote control switch receiver 6 is electrically connected to the exhaust fan 4. The wireless communication method between the remote control switch transmitter 5 and the remote control switch receiver 6 can be one of low-frequency radio frequency communication and high-frequency radio frequency communication. The remote control switch transmitter 5 can be a remote control switch with its own battery.

[0046] The remote control switch transmitter 5 includes a circuit board 52 electrically connected to the gas leak alarm 1, and the circuit board 52 includes a contact switch 521, a signal transmitter 522, a remote control circuit 523 and a photoelectric coupling circuit 524. The contact switch 521 and the signal transmitter 522 are electrically connected to the remote control circuit 523. The natural gas leak alarm 1 is electrically connected to the contact switch 521 through the photoelectric coupling circuit 524. The photoelectric coupling circuit 524 includes a photoelectric coupler 5241 and a resistor 5242. The output end of the photoelectric coupler 5241 is connected in parallel with the contact switch 521 in the remote control circuit 523. The gas leak alarm 1 is electrically connected to the input end of the photoelectric coupler 5241 through the resistor 5242. Among them, a light-emitting transistor 525 is also provided on the circuit board 52, and the light-emitting transistor 525 is electrically connected to the remote control circuit 523. When the contact switch 521 is pressed manually or a gas leakage signal is received, the light-emitting transistor 525 is powered on and lights up; the output end of the photoelectric coupler 5241 can use a MOS tube to facilitate the connection between the output end of the photoelectric coupler 5241 and the contact switch 521, avoiding the need to judge the positive and negative poles when the output end of the photoelectric coupler 5241 is connected to the contact switch 521.

[0047] With the above structure, when a natural gas leak occurs, since the natural gas leak alarm 1 is electrically connected to the solenoid valve 2 and the remote control switch 3 respectively, the remote control switch 3 is electrically connected to the exhaust fan 4; the remote control switch 3 includes a remote control switch transmitter 5 and a remote control switch receiver 6, the remote control switch transmitter 5 is electrically connected to the gas leak alarm 1, the remote control switch transmitter 5 is connected to the remote control switch receiver 6 through wireless communication, and the remote control switch receiver 6 is electrically connected to the exhaust fan 4; the remote control switch transmitter 5 includes a circuit board 52 electrically connected to the gas leak alarm 1, the circuit board 52 includes a contact switch 521, a signal transmitter 522, a remote control circuit 523 and a photoelectric coupling circuit 524, the contact switch 521 and the signal transmitter 522 are electrically connected to the remote control circuit 523, the natural gas leak alarm 1 is electrically connected to the contact switch 521 through the photoelectric coupling circuit 524, the photoelectric coupling circuit 524 includes a photoelectric coupler 5241 and a resistor 5242, the output end of the photoelectric coupler 5241 is connected in parallel with the contact switch 521 to the remote control circuit 523. In the control circuit 523, the gas leak alarm 1 is electrically connected to the input end of the photocoupler 5241 through the resistor 5242. Therefore, after the gas leak alarm 1 senses the leaked natural gas, it will sound an alarm and send an alarm signal to the solenoid valve 2 and the remote control switch transmitter 5, so that the solenoid valve 2 is automatically closed. After the photoelectric coupling circuit 524 of the remote control switch transmitter 5 receives the signal, the contact switch 521 is connected to the power supply of the remote control circuit 523, so that the signal transmitter 522 transmits a signal to the remote control switch receiver 6. After the remote control switch receiver 6 receives the signal, it is connected to the power supply of the exhaust fan 4 to discharge the leaked natural gas to achieve automatic exhaust and reduce the hazards of gas explosion and personnel poisoning. Among them, when installing it, it is only necessary to replace the gas leak alarm 1, the solenoid valve 2 and the exhaust fan 4 in the existing kitchen with the remote control switch transmitter 5 and the remote control switch receiver 6 of the remote control switch 3. The photoelectric coupling circuit 524 in the remote control switch transmitter 5 can adapt to various types of wireless switches in the existing market.

[0048] In one embodiment, see Figure 3 A rectifier circuit 5243 is connected between the resistor 5242 and the input end of the photocoupler 5241. In actual use, the setting of the rectifier circuit 5243 can rectify the circuit at the input end of the photocoupler 5241, so that the input end of the photocoupler 5241 can be connected to both AC and DC, so as to facilitate the connection between the input end of the photocoupler 5241 and the gas leak alarm 1.

[0049] In one embodiment, see Figure 1 and Figure 4The remote control switch receiver 6 includes a signal receiver 61 for receiving the signal sent by the signal transmitter 522, an execution switch 62 and an execution control circuit 63. The execution switch 62 and the signal receiver 61 are electrically connected to the execution control circuit 63, and the exhaust fan 4 is electrically connected to the execution control circuit 63 through the execution switch 62. The execution switch 62 is a relay. In actual use, after the signal transmitter 522 sends a signal, it is received by the signal receiver 61, so that the execution control circuit 63 controls the execution switch 62 to turn on the power of the exhaust fan 4, so that the exhaust fan 4 can be controlled to start and exhaust the leaked natural gas.

[0050] In one embodiment, see Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 The remote control switch transmitter 5 includes a front housing 51 and a rear housing 53, a circuit board 52 is installed between the front housing 51 and the rear housing 53, and a detachable adhesive member 54 is installed on the side of the rear housing 53 away from the front housing 51, and the adhesive member 54 includes an adhesive cloth 541 with adhesiveness. In actual use, the setting of the adhesive cloth 541 can facilitate the remote control switch transmitter 5 to be directly adhered to the wall, reducing the need to punch holes in the wall, so as to facilitate the installation of the remote control switch transmitter 5.

[0051] Two tough bars 531 are mirror-imaged on the rear shell body 53, one end of the tough bar 531 is provided with a slider 532, and the other end is connected to the rear shell body 53 through a connecting block 533, a card block 534 protruding outward is provided on the tough bar 531, a fixing body 542 is provided on the adhesive cloth 541, a first slide groove 543 is provided at the position of the fixing body 542 corresponding to the tough bar 531, a second slide groove 544 communicating with the first slide groove 543 is provided at the position of the fixing body 542 corresponding to the slider 532, the tough bar 531 is embedded in the first slide groove 543, the slider 532 is embedded in the second slide groove 544, a card groove 545 is passed through the position of the first slide groove 543 corresponding to the card block 534, the card block 534 is embedded in the card groove 545, and the width of the tough bar 531 is greater than the width of the slider 532. In actual use, the cooperation between the toughness strip 531 and the first slide groove 543, and the cooperation between the slider 532 and the second slide groove 544, can make the rear shell 53 only slide vertically on the fixed body 542, and with the cooperation between the block 534 and the slot 545, the rear shell 53 can be fixed on the adhesive cloth 541. When it is necessary to remove the rear shell 53 from the adhesive cloth 541, it only needs to be pulled up with force, and it can be bent inward under the toughness of the toughness strip 531. After the block 534 is disengaged from the slot 545, the rear shell 53 is removed from the adhesive cloth 541, so as to facilitate the maintenance of the remote control switch transmitter 5 or replacement of the battery.

[0052] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0053] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above utility model, and these changes or modifications are still within the scope of the present utility model.

Claims

1. A natural gas leakage prevention device, characterized in that: It includes a gas leak alarm, a solenoid valve installed in a natural gas pipeline, a remote control switch and an exhaust fan, wherein the gas leak alarm is electrically connected to the solenoid valve and the remote control switch respectively, and the remote control switch is electrically connected to the exhaust fan; The remote control switch includes a remote control switch transmitter and a remote control switch receiver, the remote control switch transmitter is electrically connected to the gas leak alarm, the remote control switch transmitter is connected to the remote control switch receiver via wireless communication, and the remote control switch receiver is electrically connected to the exhaust fan; The remote control switch transmitter includes a circuit board electrically connected to the gas leak alarm, the circuit board includes a contact switch, a signal transmitter, a remote control circuit and a photoelectric coupling circuit, the contact switch and the signal transmitter are electrically connected to the remote control circuit, the gas leak alarm is electrically connected to the contact switch through the photoelectric coupling circuit, the photoelectric coupling circuit includes a photoelectric coupler and a resistor, the output end of the photoelectric coupler is connected in parallel with the contact switch in the remote control circuit, and the gas leak alarm is electrically connected to the input end of the photoelectric coupler through the resistor.

2. The natural gas leakage prevention device according to claim 1, characterized in that: A rectifier circuit is connected between the resistor and the input end of the photoelectric coupler.

3. The natural gas leakage prevention device according to claim 1, characterized in that: The remote control switch receiver includes a signal receiver for receiving signals sent by a signal transmitter, an execution switch and an execution control circuit. The execution switch and the signal receiver are electrically connected to the execution control circuit, and the exhaust fan is electrically connected to the execution control circuit through the execution switch.

4. The natural gas leakage prevention device according to claim 1, characterized in that: The wireless communication between the remote control switch transmitter and the remote control switch receiver is low-frequency radio frequency communication or high-frequency radio frequency communication.

5. The natural gas leakage prevention device according to claim 3, characterized in that: The execution switch is a relay.

6. The natural gas leakage prevention device according to claim 1, characterized in that: The remote control switch transmitter comprises a front shell and a rear shell, the circuit board is installed between the front shell and the rear shell, and a detachable adhesive member is installed on a side of the rear shell away from the front shell, and the adhesive member comprises an adhesive cloth with stickiness.

7. The natural gas leakage prevention device according to claim 6, characterized in that: Two tough bars are mirror-imaged on the rear shell body, a slider is provided at one end of the tough bar, and the other end is connected to the rear shell body through a connecting block, a card block protruding outward is provided on the tough bar, a fixed body is provided on the adhesive cloth, a first slide groove is provided at the position of the fixed body corresponding to the tough bar, a second slide groove communicating with the first slide groove is provided at the position of the fixed body corresponding to the slider, the tough bar is embedded in the first slide groove, the slider is embedded in the second slide groove, a card groove passes through the position of the first slide groove corresponding to the card block, the card block is embedded in the card groove, and the width of the tough bar is greater than the width of the slider.

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