A fuel gas leak detection device

Abstract

The present invention discloses a fuel gas leakage detection device, comprising a shell, an air inlet nozzle is arranged on the top of the shell, a hollow connecting pipe is fixed on the air inlet nozzle, an extension pipe is sleeved on the hollow connecting pipe, a gas detection sensor is installed in the hollow connecting pipe, a controller is arranged in the shell, the gas detection sensor is connected to the controller, an airbag bracket is fixedly installed on the outer wall of the shell, an airbag is installed in the airbag bracket, and a one-way valve is arranged on the airbag. The present invention can increase the test range through the extension pipe, and a manually pressable airbag is arranged on one side of the shell, which can be used as a spare airbag when the air pump is not working.

Description

Technical Field

[0001] The invention relates to the technical field of gas detection tools, and in particular to a gas leakage detection device. Background Art

[0002] Gas is a general term for gaseous fuels, which can burn and release heat for use by residents and industrial enterprises. There are many types of gas, mainly natural gas, artificial gas, liquefied petroleum gas, biogas, and coal-to-gas. At present, the application field of combustible gas is rapidly expanding. While it brings great convenience to people's production and life, due to its flammable and explosive characteristics, when the combustible gas leaks into the air and reaches a certain concentration range, it is very easy to explode, posing a great threat to people's life and property safety. The air inlet nozzles of existing gas leak detectors are all fixed in length and cannot be extended for gas measurement. At the same time, there is a certain probability that the dry cell or storage battery power supply will not work due to battery exhaustion, affecting the normal detection efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a fuel gas leakage detection device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a gas leakage detection device, comprising a shell, a gas inlet nozzle is provided at the top of the shell, a hollow connecting pipe is fixedly connected to the upper end of the gas inlet nozzle, an extension pipe is movably sleeved on the hollow connecting pipe, a gas detection sensor is installed in the hollow connecting pipe or the gas inlet nozzle, a controller is provided in the shell, and the gas detection sensor is electrically connected to the controller;

[0005] Preferably, an airbag bracket is fixedly mounted on the shell, an airbag is mounted in the airbag bracket, a one-way valve is provided on the airbag, and a No. 1 air guide tube is connected between the airbag and the air inlet nozzle.

[0006] Preferably, a display screen and a control panel are provided on the outer surface of the shell, and both the display screen and the control panel are electrically connected to the controller.

[0007] Preferably, an air pump is fixedly installed in the shell, and the air pump is electrically connected to a battery and a controller installed in the shell respectively. A No. 2 air duct is connected to the air inlet of the air pump, and the air inlet of the No. 2 air duct is connected to the air inlet nozzle.

[0008] Preferably, the outer surface of the hollow connecting tube is provided with an external thread, the inner surface of one end of the extension tube is provided with an internal thread, and the extension tube and the hollow connecting tube are threadedly engaged with each other through the internal and external threads.

[0009] Preferably, an alarm is fixedly provided at the bottom of the shell, and an input end of the alarm is electrically connected to the controller.

[0010] Preferably, a filter screen is provided at one end of the extension tube.

[0011] A rubber plug is also arranged in the extension tube, and a notch is arranged on the rubber plug, and the notch can be stretched open under pressure;

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The novel method uses a threaded connection to detachably connect the extension tube to the outside of the hollow connecting tube, which facilitates the replacement of the corresponding extension tube and also extends the air inlet end accordingly, thereby increasing the test range;

[0014] (2) A manually pressurized air bag is provided on one side of the shell, which can still provide air suction when the battery is not charged in time, and is used as a backup working component to improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0017] Figure 3 is a schematic diagram of a rubber stopper;

[0018] Description of the numbers of the accompanying drawings: housing 1, display screen 2, control panel 3, airbag bracket 4, airbag 5, one-way valve 6, No. 1 air guide pipe 7, air inlet nozzle 8, hollow connecting pipe 9, extension pipe 10, filter 11, alarm 12, air pump 13, No. 2 air guide pipe 14, battery 15, controller 16, gas detection sensor 17, rubber plug 18, cut 19; DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. At least one embodiment of the present invention provides the following technical solutions:

[0023] See also Figure 1-3 The gas leakage detection device comprises a housing 1, a gas inlet nozzle 8 is arranged at the top of the housing 1, a hollow connecting pipe 9 is fixedly connected to the upper end of the gas inlet nozzle 8, an extension pipe 10 is movably sleeved on the hollow connecting pipe 9, and the hollow connecting pipe 9 and the extension pipe 10 can be installed together by threaded connection;

[0024] An air sensor is installed in the hollow connecting pipe 9 or the air inlet nozzle 8. The air sensor can be a sensor for carbon dioxide, carbon monoxide, oxygen, methane and other components. The present invention mainly detects whether the combustible gas in the air exceeds the standard, so the air sensor adopts a gas detection sensor 17;

[0025] When the air containing gas passes through the air inlet nozzle 8 , the gas detection sensor 17 can sense it; a controller 16 is provided in the housing 1 , and the gas detection sensor 17 is electrically connected to the controller 16 .

[0026] In this embodiment, a display screen 2 and a control panel 3 are provided on the outer surface of the shell 1, and the display screen 2 and the control panel 3 are electrically connected to the controller 16. The gas content sensed by the gas detection sensor 17 transmits the gas data to the display screen 2 for display through the controller 16. The connection relationship between the control panel 3 and the controller 16 and the gas detection sensor 17 can use the existing technology.

[0027] In this embodiment, an air pump 13 is fixedly installed on the inner wall of the shell 1, and the air pump 13 is electrically connected to a battery 15 and a controller 16 installed on the inner wall of the shell 1 respectively. The specific circuit connection can use the existing technology and will not be repeated here; the air inlet of the air pump 13 is connected to the No. 2 air duct 14, and the air inlet of the No. 2 air duct 14 is connected to the air inlet nozzle 8. During daily use, the air pump 13 can be used for suction operation, and the inhaled gas is discharged through the air outlet of the air pump 13 and remains in the shell 1.

[0028] In this embodiment, the outer surface of the hollow connecting tube 9 is provided with an external thread, and the inner surface of one end of the extension tube 10 is provided with an internal thread. The extension tube 10 is sleeved on the hollow connecting tube 9 through the internal thread. The threaded connection method facilitates the disassembly and replacement of the corresponding extension tube 10.

[0029] In this embodiment, an alarm 12 is fixedly provided at the bottom of the shell 1, and the input end of the alarm 12 is electrically connected to the controller 16. When the gas concentration is too high, the alarm 12 sounds an alarm. At the same time, a filter 11 is provided at one end of the extension tube 10 to prevent impurities from entering and affecting the judgment of the gas detection sensor 17.

[0030] As a preferred embodiment, a rubber plug 18 is provided at the mouth of the extension tube. The rubber plug 18 includes a body, and a plurality of cuts 19 are provided on the body with the center of the body as the base point. When the air pump 13 inhales air, the pressure of the air flow will open the cuts 19 on the rubber plug 18, so that the gas enters the housing 1 along the extension tube 10. When the air pump 13 stops working, the cuts 19 slowly rebound to restore the original state, and the mouth of the extension tube 10 is sealed (relatively sealed). The rubber plug 18 is equivalent to a sealing plug, and the gas can slowly dissipate from the extension tube 10, thereby prolonging the contact time between the gas detection sensor 17 and the inhaled gas.

[0031] As a preferred embodiment, the body can be a plate-shaped body or a conical body, and a vent hole with a diameter of about 2 mm can be opened in the center of the rubber plug 18 to achieve a sealing effect while allowing the gas in the extension tube 10 to flow out, that is, to slow down the speed at which the gas in the extension tube 10 is emitted out;

[0032] As another preferred embodiment, an airbag bracket 4 is fixedly mounted on the outer wall of the housing 1, an airbag 5 is mounted in the airbag bracket 4, a one-way valve 6 is provided on the airbag 5, and a No. 1 air guide tube 7 is connected between the airbag 5 and the air inlet nozzle 8; when the air pump 13 fails to work, the airbag 5 can be used as a spare airbag for emergency use;

[0033] When using this embodiment, it is determined whether the extension tube 10 is needed according to the environment to be tested. If it is determined to use the extension tube 10, an extension tube 10 of appropriate length is selected, and one end of the extension tube 10 is threadedly connected to the hollow connecting tube 9, so that the extension tube 10 is fixedly installed to increase the test range; for example, if a gas leak occurs in a factory building, personnel cannot enter the factory building for safety reasons, and at this time the extension tube can be extended from the window to sample the air;

[0034] During the test, the air pump 13 is started by using the control panel 3 or the switch on the air pump. The air pump 13 draws air through the second air pipe 14. The gas detection sensor 17 in the air inlet nozzle 8 detects the combustible gas content in the air. When the combustible gas content is too high, the alarm 12 sounds an alarm. The combustible gas content can be preset.

[0035] If in an emergency, the battery 15 is insufficient to start the air pump 13, the airbag 5 can be pressed manually, and the airbag 5 draws air through the No. 1 air duct 7. The air enters the airbag 5 from the air inlet nozzle 8 under the action of the suction force. When the air passes through the air inlet nozzle 8, it will contact the gas detection sensor 17, thereby sensing the gas content in the air.

[0036] The airbag 5 serves as a backup air pump and can still provide air suction when the battery 15 is not charged in time, thereby increasing the use effect and improving the test efficiency.

[0037] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0038] The above are only preferred embodiments of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A fuel gas leak detection device, comprising a housing (1), characterized in that: The shell (1) is provided with an air inlet nozzle (8) at the top end, the upper end of the air inlet nozzle (8) is fixedly connected with a hollow connecting tube (9), an extension tube (10) is movably sleeved on the hollow connecting tube (9), and a gas detection sensor (17) is installed in the hollow connecting tube (9) or in the air inlet nozzle (8); a controller (16) is provided on the shell (1), and the gas detection sensor (17) is electrically connected to the controller (16); wherein an airbag bracket (4) is fixedly installed on the outer wall of the shell (1), an airbag (5) is installed in the airbag bracket (4), a one-way valve (6) is provided on the airbag (5), and a No. 1 air guide tube (7) is connected between the airbag (5) and the air inlet nozzle (8); Wherein, a display screen (2) and a control panel (3) are provided on the outer surface of the housing (1), and the display screen (2) and the control panel (3) are both electrically connected to the controller (16); The fuel gas leakage detection device further comprises an air pump (13), a storage battery (15), and a second air guide pipe (14); the air pump (13) is installed in the housing (1), the air pump (13) is electrically connected to the storage battery (15) and the controller (16), the second air guide pipe (14) is installed on the air inlet of the air pump (13), and the air inlet of the second air guide pipe (14) is connected to the air inlet nozzle (8); The outer surface of the hollow connecting tube (9) is provided with an external thread, and the inner surface of one end of the extension tube (10) is provided with an internal thread, and the external thread of the hollow connecting tube (9) is screwed into the internal thread of the extension tube (10) in an adaptable manner; Wherein, a filter screen (11) is provided inside the extension tube (10); In which, a rubber plug (18) is also arranged in the extension tube (10), and a notch (19) is arranged on the rubber plug (18). The rubber plug (18) includes a main body, and a plurality of notches (19) are arranged on the main body with the center of the main body as the base point. When the air pump (13) inhales air, the pressure of the air flow will open the notch (19) on the rubber plug (18), and the gas will enter the shell (1) along the extension tube (10). When the air pump (13) stops working, the notch (19) slowly rebounds to its original state, sealing the tube mouth of the extension tube (10). A 2mm diameter air vent is opened in the center of the rubber plug (18), so that the gas in the extension tube (10) can flow out.

2. A fuel gas leak detection device according to claim 1, characterized in that: An alarm (12) is fixedly provided at the bottom of the housing (1), and an input end of the alarm (12) is electrically connected to a controller (16).

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