CN217178300U

CN217178300U - Gas leakage detection device and gas pipeline system

Info

Publication number: CN217178300U
Application number: CN202120933381.4U
Authority: CN
Inventors: 杨福源; 邓欣涛; 王天泽; 欧阳明高
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-08-12
Anticipated expiration: 2031-04-30

Abstract

The utility model relates to a gas leakage detection device and gas piping system. The gas leakage detection device comprises a first mounting shell, a second mounting shell and a sensor; the first mounting shell and the second mounting shell are combined to form a clamping cavity for clamping the pipe joint and the gas pipeline, and the first mounting shell is provided with a mounting cavity communicated with the clamping cavity; the sensor is arranged in the installation cavity and used for acquiring and transmitting the gas concentration in the installation cavity. Once the threaded connection between the nut of the ferrule type pipe joint and the joint main body is loosened but not completely failed or pulled out, gas in the gas pipeline leaks out through the matching part between the nut and the gas pipeline, then flows into a clamping cavity formed by the first mounting shell and the second mounting shell after being closed, and further flows into the mounting cavity of the first mounting shell to be detected by the sensor.

Description

Gas leakage detection device and gas pipeline system

Technical Field

The utility model relates to a gas leakage detects technical field, especially relates to a gas leakage detection device and gas piping system.

Background

Energy exhaustion and environmental pollution caused by fossil energy consumption are becoming serious, and large-scale development and utilization of renewable energy are imperative. Although renewable energy resources are abundant and widely distributed, the renewable energy resources fluctuate violently and are periodically influenced by natural environments. The hydrogen is used as an effective energy storage carrier, can store chemical energy converted from renewable energy sources during the power generation peak period, and converts the chemical energy carried by the hydrogen into electric energy again for use through the fuel cell during the power utilization peak period. Among them, hydrogen is a very flammable and explosive gas, and when the volume fraction of hydrogen in air exceeds 4% and is less than 75%, it may cause combustion or explosion upon encountering a fire source, hot spots, static electricity, or the like. At present, in order to ensure the tightness of hydrogen gas during transportation and storage of hydrogen gas, a ferrule type pipe joint is generally adopted to enable a hydrogen gas conveying gas pipeline to be adjacent to other gas pipelines or equipment. However, when the screw connection at the joint is loosened but not completely failed or pulled out, a trace amount of hydrogen is released, and there is also a risk of combustion or explosion.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a gas leakage detection device and a gas piping system, which are directed to the problem that there is a risk of combustion or explosion when the screw connection at the joint of the pipe joint is loosened, but not completely failed, or pulled out.

A gas leak detection apparatus, comprising: the device comprises a first mounting shell, a second mounting shell and a sensor;

the first mounting shell and the second mounting shell are folded to form a clamping cavity for clamping a pipe joint and a gas pipeline, and the first mounting shell is provided with a mounting cavity communicated with the clamping cavity;

the sensor is arranged in the installation cavity and used for acquiring and transmitting the gas concentration in the installation cavity.

In one embodiment, the first mounting shell is provided with a first groove, and the first groove penetrates through two opposite side walls of the first mounting shell along the axial direction of the gas pipeline;

the second installation shell is provided with a second groove, the second groove penetrates through two opposite side walls in the second installation shell along the axial direction of the gas pipeline, and the second groove and the first groove are matched to form the clamping cavity.

In one embodiment, a first lock catch is arranged at a first end of the first mounting shell, a second lock catch is arranged at a second end of the first mounting shell, the first lock catch and the second lock catch both extend along the axial direction of the gas pipeline, and the first end and the second end of the first mounting shell are distributed oppositely;

a third lock catch is arranged at the first end of the second mounting shell, a fourth lock catch is arranged at the second end of the second mounting shell, the third lock catch and the fourth lock catch both extend along the axial direction of the gas pipeline, and the first end and the second end of the second mounting shell are distributed oppositely;

the first mounting shell or the second mounting shell can slide along the gas pipeline until the third lock catch is locked with the first lock catch and the second lock catch is locked with the fourth lock catch.

In one embodiment, the first lock catch is provided with a first lock groove, notches of the first lock groove are distributed facing the central axis of the gas pipeline, the first lock groove penetrates through two opposite side walls of the first lock catch along the axial direction of the gas pipeline, and the third lock catch protrudes from the second mounting shell along a direction departing from the central axis of the gas pipeline and can be clamped in the first lock groove;

the second lock catch is provided with a second lock groove, the notch of the second lock groove faces the central axis of the gas pipeline and is distributed, the second lock groove penetrates through two opposite side walls in the second lock catch along the axial direction of the gas pipeline, and the fourth lock catch deviates from the central axis of the gas pipeline and protrudes from the second mounting shell and can be clamped in the second lock groove.

In one embodiment, reinforcing ribs are disposed between the first lock catch and the first mounting housing, and between the second lock catch and the first mounting housing.

In one embodiment, the first end of the first mounting housing is hinged with the first end of the second mounting housing, and the second end of the second mounting housing is in snap-fit connection with the second end of the second mounting housing;

the first end and the second end of the first mounting shell are distributed oppositely, and the first end and the second end of the second mounting shell are distributed oppositely.

In one embodiment, the first mounting housing or/and the second mounting housing can move in a direction close to the gas pipeline until the first end of the first mounting housing is in snap-fit connection with the first end of the second mounting housing and the second end of the first mounting housing is in snap-fit connection with the second end of the second mounting housing;

In one embodiment, the first mounting shell is provided with a wiring hole communicated with the mounting cavity.

In one embodiment, the sensor is installed in the installation cavity through insulating glue, and the insulating glue is filled in the installation cavity to break a channel between the installation cavity and the wiring hole.

A gas line system, comprising: a pipe joint, a gas line, and the gas leakage detection device of any one of the above;

the first mounting shell and the second mounting shell of the gas leakage detection device can clamp the pipe joint and the gas pipeline after being closed.

According to the gas leakage detection device and the gas pipeline system, the first installation shell and the second installation shell of the gas leakage detection device can be clamped on a gas pipeline and a pipe joint in an involutory mode, such as a cutting sleeve type pipe joint. Because the installation cavity can be regarded as a relatively closed small space relative to the external environment, the gas concentration in the installation cavity can quickly reach the lower limit of the detection concentration of the sensor, and the sensitivity and the corresponding speed of the gas leakage detection device can be greatly improved. In addition, the gas leakage detection device can be quickly installed on the pipe joint and the gas pipeline through the involution of the first installation shell and the second installation shell, and the disassembly and assembly efficiency of the gas leakage detection device is improved.

Drawings

Fig. 1 is a schematic view illustrating a fitting between a gas leakage detection device and a ferrule type pipe joint and a gas pipeline according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of the gas leak detection apparatus according to an embodiment of the present invention after being installed between the ferrule type pipe joint and the gas pipeline;

fig. 3 is a schematic view illustrating an installation of the gas leakage detecting device between the ferrule type pipe joint and the gas pipeline according to an embodiment of the present invention;

fig. 4 is a schematic view illustrating the cooperation between the gas leakage detection device and the ferrule type pipe joint and the gas pipeline according to another embodiment of the present invention;

fig. 5 is a schematic view illustrating an installation of a gas leakage detecting device between a ferrule type pipe joint and a gas pipeline according to another embodiment of the present invention;

fig. 6 is a cross-sectional view of a gas leak detection device according to another embodiment of the present invention after being installed between a ferrule type pipe joint and a gas pipeline;

fig. 7 is a schematic view illustrating the cooperation between the gas leakage detection device and the ferrule type pipe joint and the gas pipeline according to another embodiment of the present invention;

fig. 8 is a cross-sectional view of the gas leak detector, the ferrule type pipe joint, and the gas pipeline according to another embodiment of the present invention.

Wherein the reference numerals in the drawings are as follows:

100. a gas leak detection device; 100a, a clamping cavity; 100b, a third accommodating groove; 100c, a fourth accommodating groove; 110. a first mounting housing; 110a, a mounting cavity; 110b, a first groove; 110c, a wiring hole; 110d, a first card slot; 111. a first lock catch; 111a, a first locking groove; 112. a second lock catch; 112a, a second lock groove; 113. reinforcing ribs; 114. a second buckle; 120. a second mounting housing; 120a, a second groove; 120b, a second card slot; 121. a third lock catch; 122. a fourth lock catch; 123. a first buckle; 130. a sensor; 131. a peripheral circuit board; 132. a gas sensing element; 140. insulating glue; 200. a connector body; 300. a nut; 400. a gas pipeline.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

An embodiment of the present invention provides a gas leakage detecting device 100, as shown in fig. 1 to 8, the gas leakage detecting device 100 includes: a first mounting housing 110, a second mounting housing 120, and a sensor 130; the first mounting housing 110 and the second mounting housing 120 can form a clamping cavity 100a for clamping the pipe joint and the gas pipeline 400 after being combined, and the first mounting housing 110 is provided with a mounting cavity 110a communicated with the clamping cavity 100 a; sensor 130 is disposed in mounting cavity 110a, and sensor 130 is used to acquire and transmit the gas concentration in mounting cavity 110 a.

The pipe joint is used for connecting a gas pipeline and can be a CT threaded joint, a pipe threaded joint, a clamping sleeve type pipe joint and other threaded joints. The structure and the installation of the gas leak detection device will be described below by taking the ferrule type pipe joint as an example.

Wherein, cutting ferrule formula coupling includes: a fitting body 200, a nut 300, and a ferrule (not shown in the figures); after the cutting ferrule and the nut 300 are sleeved on the gas pipeline 400 and inserted into the joint main body 200, and the nut 300 is screwed, the outer side of the front end of the cutting ferrule is attached to the conical surface of the joint main body 200, and the inner edge is uniformly bitten into the gas pipeline 400 to form effective sealing. Compared with other types of pipe joints, the ferrule type pipe joint has the advantages of firm connection, good sealing performance and the like, and is widely applied to the fields of gas transportation and storage, such as hydrogen. However, when the nut 300 is loosened, the outer side of the front end of the ferrule no longer abuts against the tapered surface of the connector body 200, and gas (e.g., hydrogen) in the gas pipe 400 leaks from the gap between the ferrule and the tapered surface of the connector body 200 to the gap between the nut 300 and the gas pipe 400.

To solve this problem, the gas leakage detecting apparatus 100 provided in this embodiment may be installed on the ferrule type pipe joint for detecting whether hydrogen gas leaks between the nut 300 of the ferrule type pipe joint and the gas pipeline 400. It should be noted that after the first mounting housing 110 and the second mounting housing 120 of the gas leakage detecting apparatus 100 are clamped between the ferrule type tube fitting and the gas pipeline 400, a clamping cavity 100a formed by the first mounting housing 110 and the second mounting housing 120 being combined with each other is communicated with a matching portion between the nut 300 of the ferrule type tube fitting and the gas pipeline 400. Once the nut 300 is loosened, the gas in the gas pipe 400 flows into the clamping cavity 100a of the gas leakage detecting apparatus 100 from the matching position between the nut 300 and the gas pipe 400, and then flows into the mounting cavity 110a of the first mounting housing 110, and the sensor 130 in the mounting cavity 110a detects the gas and sends a signal to an external collecting device. As an example, as shown in fig. 8, the sensor 130 includes: the peripheral circuit board 131 and the gas sensor 132 integrated on the peripheral circuit board 131. When the gas sensor 132 detects that the gas concentration reaches the set value, it can generate a voltage signal, which is received by an external collection device, and an alarm is given.

In the gas leakage detection apparatus 100 as described above, the first mounting housing 110 and the second mounting housing 120 are clamped in the gas pipe 400 and the pipe joint, such as a ferrule type pipe joint, in an aligned manner, when the screw connection between the nut 300 and the joint main body 200 of the ferrule type pipe joint is loosened but not completely failed or pulled out, the gas in the gas pipe 400 leaks out through the gap between the nut 300 and the gas pipe 400, and then flows into the clamping cavity 100a formed by the first mounting housing 110 and the second mounting housing 120 in an aligned manner, and further flows into the mounting cavity 110a of the first mounting housing 110 to be detected by the sensor 130. Since the installation cavity 110a can be regarded as a relatively closed small space with respect to the external environment, the gas concentration in the installation cavity 110a can quickly reach the lower detection concentration limit of the sensor 130, so that the sensitivity and the corresponding speed of the gas leakage detection apparatus 100 can be greatly improved. In addition, the gas leakage detection device 100 can be quickly mounted on the pipe joint and the gas pipeline 400 by the alignment of the first mounting housing 110 and the second mounting housing 120, thereby improving the assembly and disassembly efficiency of the gas leakage detection device 100.

In some embodiments of the present invention, as shown in fig. 3, 5, 7 and 8, the first mounting housing 110 has a first groove 110b, and the first groove 110b penetrates through two opposite sidewalls of the first mounting housing 110 along the axial direction of the gas pipeline 400; the second mounting housing 120 has a second groove 120a, the second groove 120a penetrates through two opposite sidewalls of the second mounting housing 120 along the axial direction of the gas pipeline 400, and the second groove 120a and the first groove 110b cooperate to form a clamping cavity 100 a. The first and

second grooves

110b, 120a have contours matching the contours of the gas pipe 400, and for example, the gas pipe 400 is a circular pipe, and the first and

second grooves

110b, 120a are both semicircular grooves. Optionally, as shown in fig. 8, the depth H of the first groove 110b may be greater than the radius of the gas pipeline 400, and after the first mounting housing 110 and the second mounting housing 120 are clamped on the gas pipeline 400 in an involution manner, the first mounting housing 110 is not attached to the gas pipeline 400, so that the gas leaked from the gas pipeline 400 can smoothly flow into the mounting cavity 110a of the first mounting housing 110, and the sensitivity of the sensor 130 is improved. Of course, in other embodiments of the present invention, the depth of the second groove 120a may be greater than the radius of the gas pipeline 400.

As for the way of mating the first mounting housing 110 with the second mounting housing 120, three examples are given as follows:

as shown in fig. 1 to 3, a first locking buckle 111 is disposed at a first end of the first mounting housing 110, a second locking buckle 112 is disposed at a second end of the first mounting housing 110, and the first locking buckle 111 and the second locking buckle 112 both extend along an axial direction of the gas pipeline 400, wherein the first end and the second end of the first mounting housing 110 are distributed oppositely; a third lock catch 121 is arranged at the first end of the second mounting housing 120, a fourth lock catch 122 is arranged at the second end of the second mounting housing 120, the third lock catch 121 and the fourth lock catch 122 both extend along the axial direction of the gas pipeline 400, wherein the first end and the second end of the second mounting housing 120 are distributed oppositely; the first mounting housing 110 or the second mounting housing 120 can slide along the gas pipeline 400 until the third lock catch 121 is locked with the first lock catch 111 and the second lock catch 112 is locked with the fourth lock catch 122. During installation, the first installation housing 110 (or the second installation housing 120) may be first placed on the joint main body 200 of the ferrule type tube fitting and the gas pipeline 400, and then the second installation housing 120 (the first installation housing 110) is slid toward the first installation housing 110 (or the second installation housing 120) along the axial direction of the gas pipeline 400 until the third lock catch 121 is locked with the first lock catch 111 and the second lock catch 112 is locked with the fourth lock catch 122.

In some embodiments of the present invention, as shown in fig. 3, the first locking device 111 has a first locking groove 111a, the notch of the first locking groove 111a is distributed facing the central axis of the gas pipeline 400, the first locking groove 111a penetrates through two opposite sidewalls of the first locking device 111 along the axial direction of the gas pipeline 400, as shown in fig. 3, the third locking device 121 protrudes from the second mounting housing 120 along a direction away from the central axis of the gas pipeline 400 and can be clamped in the first locking groove 111 a; the second locking catch 112 has a second locking groove 112a, the notch of the second locking groove 112a is distributed facing the central axis of the gas pipeline 400, the second locking groove 112a penetrates through two opposite side walls of the second locking catch 112 along the axial direction of the gas pipeline 400, and the fourth locking catch 122 protrudes from the second mounting housing 120 along the direction deviating from the central axis of the gas pipeline 400 and can be clamped in the second locking groove 112 a.

Alternatively, as shown in fig. 3, the first locking groove 111a and the second locking groove 112a are rectangular grooves; correspondingly, as shown in fig. 3, the first locking device 111 and the second locking device 112 are rectangular parallelepiped protrusions. Of course, in other embodiments, the first locking groove 111a and the second locking groove 112a may be configured in other shapes as long as it is ensured that the first locking catch 111 fits into the first locking groove 111a and the second locking catch 112 fits into the second locking groove 112 a. The first locking device 111 and the second locking device 112 may be integrally formed on the second mounting housing 120 by welding.

Optionally, as shown in fig. 3, reinforcing ribs 113 are disposed between the first latch 111 and the first mounting housing 110, and between the second latch 112 and the first mounting housing 110. The reinforcing ribs 113 may increase the coupling strength between the first locker 111 and the first mounting case 110 and between the second locker 112 and the first mounting case 110. The number of the reinforcing ribs 113 may be plural (e.g., 3 to 5), and the plural reinforcing ribs 113 are spaced apart from each other in the axial direction of the gas pipe 400. The reinforcing ribs 113 may be integrally formed or welded between the first latch 111 and the first mounting housing 110 and between the second latch 112 and the first mounting housing 110

As an example of (2), as shown in fig. 4 to 6, the first mounting housing 110 or/and the second mounting housing 120 can move in a direction approaching the gas pipeline 400 until the first end of the first mounting housing 110 is snap-connected with the first end of the second mounting housing 120 and the second end of the first mounting housing 110 is snap-connected with the second end of the second mounting housing 120; the first end and the second end of the first mounting housing 110 are opposite to each other, and the first end and the second end of the second mounting housing 120 are opposite to each other. When the first and second mounting

housings

110 and 120 are mounted, the first and second mounting

housings

110 and 120 can move toward each other until the first end of the first mounting housing 110 is connected to the first end of the second mounting housing 120 by a snap fit, and the second end of the first mounting housing 110 is connected to the second end of the second mounting housing 120 by a snap fit.

Optionally, as shown in fig. 5, the first end and the second end of the first mounting housing 110 are both provided with a first slot 110d, the first end and the second end of the second mounting housing 120 are both provided with a first buckle 123, and the first buckle 123 is buckled to the corresponding first slot 110 d; or, the first end and the second end of the first mounting housing 110 are both provided with a first buckle, the first end and the second end of the second mounting housing 120 are both provided with a first clamping groove, and the first buckle is buckled to the corresponding first clamping groove. Optionally, a first engaging groove 110d or a first engaging buckle is respectively disposed in the middle of the first end and the second end of the first mounting housing 110, and correspondingly, a first engaging buckle 123 or a first engaging groove is also respectively disposed in the middle of the first end and the second end of the second mounting housing 120. The first latch 123 may be integrally formed or welded on the first mounting housing 110 or the second mounting housing 120.

As shown in fig. 7 and 8, in the example of the (3), the first end of the first mounting housing 110 is hinged to the first end of the second mounting housing 120, and the second end of the second mounting housing 120 is connected to the second end of the second mounting housing 120 in a snap-fit manner; the first end and the second end of the first mounting housing 110 are opposite to each other, and the first end and the second end of the second mounting housing 120 are opposite to each other. During installation, the second installation housing 120 may be placed on the ferrule type pipe joint and the gas pipeline 400, and then the first installation housing 110 is rotated until the second end of the first installation housing 110 is fastened to the second end of the second installation housing 120; or the first installation housing 110 is first placed on the ferrule type pipe joint and the gas pipeline 400, and then the second installation housing 120 is rotated until the second end of the second installation housing 120 is fastened to the second end of the first installation housing 110.

Optionally, a second end of the first mounting housing 110 has a second slot, and second ends of the second mounting housings 120 are both provided with a second buckle, and the second buckle is buckled to the second slot; or, as shown in fig. 7, the second end of the first mounting housing 110 has a second buckle 114, the second end of the second mounting housing 120 has a second locking groove 120b, and the second buckle 114 is fastened to the first locking groove 110 d. Optionally, a second locking groove or a second locking buckle 114 is disposed in the middle of the second end of the first mounting housing 110, and correspondingly, a second locking groove or a second locking groove 120b is also disposed in the middle of the second end of the second mounting housing 120. The second latch 114 may be integrally formed or welded on the first mounting housing 110 or the second mounting housing 120.

Alternatively, the first end of the first mounting housing 110 may be hinged to the first end of the second mounting housing 120 by a rotating shaft, or a rotatable and deformable material, such as plastic, may be disposed at the hinge between the first end of the first mounting housing 110 and the first end of the second mounting housing 120, that is, the material is used to connect the first end of the first mounting housing 110 to the first end of the second mounting housing 120.

In some embodiments of the present invention, as shown in fig. 1 to 3, the first mounting housing 110 is provided with a wire hole 110c communicating with the mounting cavity 110 a. A cable on the sensor 130 may be connected to an external collection device through the wire routing hole 110c to transmit the acquired gas concentration to the external collection device. Of course, in some other embodiments of the present invention, the sensor 130 may also be configured with a wireless transmission module, and the wireless transmission module is used to transmit the gas concentration acquired by the sensor 130 to an external collection device. By disposing the wireless transmission module on the sensor 130, there is no need to open the wiring hole 110c (see fig. 4 to 8) in the first mounting case 110.

Further, in some embodiments of the present invention, as shown in fig. 2, the sensor 130 is installed in the installation cavity 110a through the insulation paste 140, and the insulation paste 140 is filled in the installation cavity 110a to disconnect the passage between the installation cavity 110a and the wire hole 110 c. The insulating glue 140 not only can fix the sensor 130, but also can prevent the sensor 130 from leaking electricity to ensure the normal use of the gas leakage detecting device 100, and can also prevent the gas leaked from the gas pipeline 400 from flowing out of the wiring hole 110c to ensure the sensitivity of the sensor 130.

Optionally, the first mounting housing 110 is provided with an opening communicating with the mounting cavity 110a, and the opening is provided with a cover plate. The sensor 130 and the insulating adhesive 140 may be mounted in the mounting cavity 110a of the first mounting housing 110 through the opening of the first mounting housing 110, and then the cover plate is mounted to the opening of the first mounting housing 110.

As for the mounting manner of the gas leak detection apparatus 100, two examples are given as follows:

in the example (1), as shown in fig. 2, the first mounting housing 110 and the second mounting housing 120 are aligned to clamp the joint main body 200 of the ferrule type pipe joint and the gas pipe 400, and the nut 300 is located in the clamping cavity 100a formed by the alignment of the first mounting housing 110 and the second mounting housing 120.

Optionally, a first receiving groove is provided on an end of each of the first and second mounting

housings

110 and 120 for clamping the joint main body 200, and a first sealing member (e.g., a rubber ring) is mounted in the first receiving groove and used for sealing a gap between each of the first and second mounting

housings

110 and 120 and the joint main body 200; a second receiving groove is formed at an end of each of the first and second mounting

cases

110 and 120 for holding the gas pipe 400, and a second sealing member (e.g., a rubber ring) for sealing a gap between each of the first and second mounting

cases

110 and 120 and the gas pipe 400 is mounted in the second receiving groove. The first and second sealing members may be configured such that after the first and second mounting

housings

110 and 120 are aligned and clamped with the joint main body 200 and the gas pipeline 400 of the ferrule type tube fitting, a clamping cavity 100a formed between the first and second mounting

housings

110 and 120 is a closed cavity, thereby improving the sensitivity of the sensor 130.

Alternatively, as shown in fig. 2, the nut 300 is used to restrict the first and second mounting

housings

110 and 120 from sliding along the gas pipe 400. Therefore, the gas of the gas leakage detection device 100 can be prevented from sliding along the gas pipeline 400, the clamping cavity 100a formed by the involution of the first installation shell 110 and the second installation shell 120 in the detection process of the gas leakage detection device 100 is always communicated with the matching part between the nut 300 and the gas pipeline 400, and the sensitivity of the sensor 130 is improved.

In the example (2), as shown in fig. 4 to 8, the first mounting case 110 and the second mounting case 120 can be aligned to clamp the nut 300 and the gas pipe 400.

Alternatively, as shown in fig. 6, a third receiving groove 100b is provided on an end portion of the first and second mounting

housings

110 and 120 for holding the nut 300, and a third sealing member (e.g., a rubber ring) for sealing a gap between the first and second mounting

housings

110 and 120 and the nut 300 is mounted in the third receiving groove 100 b; a fourth receiving groove 100c is formed at an end portion of the first and second mounting

cases

110 and 120 for holding the gas pipe 400, and a fourth sealing member (e.g., a rubber ring) for sealing a gap between the first and second mounting

cases

110 and 120 and the gas pipe 400 is mounted in the fourth receiving groove 100 c. The third and fourth sealing members may enable the clamping cavity 100a formed between the first and second mounting

housings

110 and 120 to be a closed cavity after the first and second mounting

housings

110 and 120 are aligned and clamped with the nut 300 and the gas pipeline 400 of the ferrule type tube fitting, thereby improving the sensitivity of the sensor 130.

Optionally, a limiting groove is formed in an outer wall of the nut 300, a limiting protrusion 115 (see fig. 6) is formed on the first mounting shell 110 or the second mounting shell 120, and the limiting protrusion 115 is accommodated in the limiting groove to limit the first mounting shell 110 and the second mounting shell 120 from sliding along the gas pipeline 400; or the outer wall of the nut 300 is provided with a limiting protrusion, the first mounting housing 110 or the second mounting housing 120 is provided with a limiting groove, and the limiting protrusion is accommodated in the limiting groove to limit the first mounting housing 110 and the second mounting housing 120 to slide along the gas pipeline 400. Therefore, the gas of the gas leakage detection device 100 can be prevented from sliding along the gas pipeline 400, the clamping cavity 100a formed by the involution of the first installation shell 110 and the second installation shell 120 in the detection process of the gas leakage detection device 100 is always communicated with the matching part between the nut 300 and the gas pipeline 400, and the sensitivity of the sensor 130 is improved.

Another embodiment of the present invention further provides a gas pipeline system, as shown in fig. 1 to 8, the gas pipeline system includes: a pipe joint, a gas pipe 400, and the gas leak detection apparatus 100 according to any one of the above; the first mounting case 110 and the second mounting case 120 of the gas leak detection apparatus 100 can clamp the pipe joint and the gas pipe 400 after being aligned.

The pipe joint is used for connecting a gas pipeline and can be a CT threaded joint, a pipe threaded joint, a clamping sleeve type pipe joint and other threaded joints.

In the gas pipeline system as described above, the first mounting housing 110 and the second mounting housing 120 of the gas leakage detecting device 100 may be clamped between the gas pipeline 400 and a pipe joint, such as a ferrule type pipe joint, and once the threaded connection between the nut 300 and the joint main body 200 of the ferrule type pipe joint is loosened but not completely failed or pulled out, the gas in the gas pipeline 400 leaks out through the gap between the nut 300 and the gas pipeline 400, and then flows into the clamping cavity 100a formed by the first mounting housing 110 and the second mounting housing 120 being clamped together, and further flows into the mounting cavity 110a of the first mounting housing 110 and is detected by the sensor unit. Since the installation cavity 110a can be regarded as a relatively closed small space relative to the external environment, the gas concentration in the installation cavity 110a can quickly reach the lower detection concentration limit of the sensor 130, so that the sensitivity and corresponding speed of gas leakage detection can be greatly improved. In addition, the gas leakage detection device 100 can be quickly mounted on the pipe joint and the gas pipeline 400 by the alignment of the first mounting housing 110 and the second mounting housing 120, thereby improving the assembly and disassembly efficiency of the gas leakage detection device 100.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A gas leak detection apparatus, characterized by comprising: the device comprises a first mounting shell, a second mounting shell and a sensor;

the first mounting shell and the second mounting shell are combined to form a clamping cavity for clamping a pipe joint and a gas pipeline, and the first mounting shell is provided with a mounting cavity communicated with the clamping cavity;

2. The gas leak detecting apparatus according to claim 1, wherein the first mounting case has a first groove formed thereon, the first groove penetrating through opposite side walls of the first mounting case in an axial direction of the gas pipe;

3. The gas leak detecting device according to claim 1, wherein a first locking catch is disposed at a first end of the first mounting housing, a second locking catch is disposed at a second end of the first mounting housing, and the first locking catch and the second locking catch both extend along an axial direction of the gas pipeline, wherein the first end and the second end of the first mounting housing are distributed oppositely;

4. The gas leak detection device according to claim 3, wherein the first lock catch has a first lock groove, the notch of the first lock groove is distributed facing the central axis of the gas pipeline, the first lock groove penetrates through two opposite side walls of the first lock catch along the axial direction of the gas pipeline, and the third lock catch protrudes from the second mounting housing in a direction away from the central axis of the gas pipeline and can be clamped in the first lock groove;

5. The gas leak detection apparatus according to claim 4, wherein reinforcing ribs are provided between the first lock catch and the first mounting case, and between the second lock catch and the first mounting case.

6. The gas leak detection device according to claim 1, wherein a first end of the first mounting housing is hinged to a first end of the second mounting housing, and a second end of the second mounting housing is snap-fit to a second end of the second mounting housing;

7. The gas leak detection device according to claim 1, wherein the first mounting housing or/and the second mounting housing is/are movable in a direction approaching the gas pipeline until the first end of the first mounting housing is snap-fitted with the first end of the second mounting housing and the second end of the first mounting housing is snap-fitted with the second end of the second mounting housing;

8. The gas leak detection apparatus according to any one of claims 1 to 7, wherein a wiring hole communicating with the mounting chamber is provided in the first mounting case.

9. The gas leak detection apparatus according to claim 8, wherein the sensor is mounted in the mounting cavity by an insulating paste, and the insulating paste is filled in the mounting cavity to disconnect a passage between the mounting cavity and the wiring hole.

10. A gas line system, comprising: a pipe joint, a gas line, and the gas leak detection device according to any one of claims 1 to 9;