Airtightness monitoring device for gas pipeline connection node

Abstract

The utility model discloses an airtightness monitoring device for a gas pipeline connection node, relates to the technical field of gas pipelines, and can solve the problem that misjudgment is easy to occur due to gas leakage at the gas pipeline connection node. The gas tightness monitoring device for the gas pipeline connection node comprises a shell with a cavity and elastic skirts which are fixedly connected to the two ends of the shell in a sealed mode respectively. The device further comprises at least two locking hoops for sealing and locking the elastic skirt edge on the first pipeline and the second pipeline. The shell is provided with an air leakage indicating head used for monitoring and indicating air pressure changes in the cavity in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pipelines, and in particular to an airtight monitoring device for gas pipeline connection nodes. Background Art

[0002] Gas is a general term for combustible gases. It releases heat through combustion and is widely used by commercial and residential users. Since gas is flammable and explosive, and if it leaks into a relatively confined space, failure to ventilate and evacuate in time may lead to suffocation of personnel, fire, explosion and other safety accidents. In order to ensure the safety of gas use, there are various preventive measures and precautions to ensure safe use. In its transportation, dedicated gas pipelines are usually used, and the air tightness and aging of gas terminal equipment need to be checked regularly to prevent leakage and cause safety accidents.

[0003] However, in specific usage scenarios, there are still many safety hazards. When replacing gas terminal equipment, such as gas water heaters, stoves and other terminal equipment, it is necessary to reconnect the gas pipeline to the gas terminal equipment's air inlet. At the connection nodes of the gas pipeline, it is easy for the connection to be loose and leaks to occur. Whether the gas leaks or not depends on the experience of the maintenance personnel, especially when individuals replace the connection between the gas pipeline and the gas terminal equipment by themselves. The simple judgment method is usually to apply foam water to the connection node and rely on the naked eye to judge whether there is a leak. It is easy to misjudge the leakage of the connection node, which poses a major safety hazard and threatens personal and property safety.

[0004] Based on the above background, the inventor has designed a gas tightness monitoring device for gas pipeline connection nodes to solve the problem of gas leakage judgment at gas pipeline connection nodes and avoid misjudgment. Utility Model Content

[0005] The purpose of the present application is to provide an airtightness monitoring device for a gas pipeline connection node, so as to solve the problem that misjudgment of gas leakage at the gas pipeline connection node is easy to occur.

[0006] In order to solve the above technical problems, the utility model adopts the following solutions:

[0007] The present application provides an airtight monitoring device for a gas pipeline connection node, comprising a shell having a cavity, and elastic skirts respectively sealed and fixedly connected to both ends of the shell;

[0008] It also includes at least two locking hoops for sealing and locking the elastic skirt on the first pipe and the second pipe;

[0009] The shell is provided with a leakage indicating head for real-time monitoring and indicating the change of air pressure in the cavity.

[0010] Optionally, the air leakage indicator head includes an indicator head body communicated with the inner cavity of the housing, and an indicator piston disposed in the indicator head body and connected thereto in a sliding and sealing manner;

[0011] The indicator head body is made of transparent plastic;

[0012] An indicating scale is arranged on the side wall of the indicating head body.

[0013] Optionally, the indicating piston is a layered structure, comprising an indicating layer and at least one sealing layer, and the indicating layer and the sealing layer are coaxially fixedly connected.

[0014] Optionally, the air leakage indicator head further comprises a tension spring disposed in the indicator head body, one end of the tension spring is fixedly connected to the indicator head body, and the other end is fixedly connected to a side of the indicator piston away from the cavity;

[0015] The shell is also provided with a gas extraction head body for extracting gas in the cavity thereof.

[0016] Optionally, the vacuum head body includes an elastic section, and a vacuum head mouth tightener for tightening the elastic section, and the vacuum head mouth tightener is sleeved on the elastic section.

[0017] Optionally, the cross-sectional shape of the shell is circular;

[0018] The shell is made of plastic or rubber;

[0019] The elastic skirts are made of rubber.

[0020] Optionally, the shell is made of rubber, and the shell and the elastic skirt are made by an integrated molding process.

[0021] Optionally, the shell is made of plastic, and both ends of the shell are provided with annular connecting edges, and the elastic skirt is bonded and fixed to the connecting edges of the shell.

[0022] Optionally, the elastic skirt has a trumpet shape or a circular shape.

[0023] Optionally, the locking clamp is an adjustable locking clamp.

[0024] Beneficial effects of the utility model:

[0025] 1. The present application provides a shell, an elastic skirt, a locking hoop and a leakage indicator head. During the process of connecting the gas pipelines, the elastic skirts on both sides of the shell can be locked and fixed to the first pipeline and the second pipeline by using the locking hoop, so that the cavity in the shell becomes a closed cavity, and the connection node between the first pipeline and the second pipeline is completely covered and sealed. Since the leakage indicator head is provided on the shell, once a leakage occurs at the connection node between the first pipeline and the second pipeline, the leakage problem at the connection node can be accurately and timely monitored through the cavity air pressure change monitored by the leakage indicator head, which can effectively solve the problem of misjudgment of leakage that is currently prone to occur.

[0026] 2. The overall structure of the present application is reliable and simple, with low manufacturing cost. It can be directly left at the connection node after the gas pipeline is connected, which can not only play a long-term monitoring role, but also can provide subsequent protection for the connection node. When a gas leak occurs at the connection node, it can avoid direct leakage into the air, thereby improving the leak-proof effect of the entire connection node.

[0027] 3. This application can evacuate the cavity in the shell by setting up a vacuum head main body and a vacuum head mouthpiece, so that the air pressure in the cavity is lower than the external atmospheric pressure, and the pressure difference between the air pressure in the gas pipeline and the air pressure in the cavity is expanded after the gas pipeline is connected, thereby improving the leak prevention and monitoring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure in the embodiment of the present application.

[0029] Description of reference numerals:

[0030] 1-first pipeline, 2-second pipeline, 3-connecting node, 4-shell, 401-cavity, 41-vacuum head body, 411-elastic section, 412-vacuum head mouth restrainer, 42-leakage indicator head, 421-indicator head body, 422-indicator piston, 423-tension spring, 424-indicator scale, 43-connecting edge, 5-elastic skirt, 6-locking clamp. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0032] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model 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, and therefore cannot be understood as a limitation on the present utility model.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be 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.

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0035] like Figure 1 As shown, this embodiment provides a gas tightness monitoring device for a gas pipeline connection node 3, comprising a shell 4 having a cavity 401, and elastic skirts 5 respectively sealed and fixedly connected to both ends of the shell 4;

[0036] It also includes at least two locking hoops 6 for sealing and locking the elastic skirt 5 on the first pipe 1 and the second pipe 2;

[0037] The housing 4 is provided with a leakage indicator 42 for real-time monitoring and indicating the change of air pressure in the cavity 401 .

[0038] In this embodiment, by providing a shell 4, an elastic skirt 5, a locking hoop 6 and a leakage indicator head 42, the elastic skirt 5 on both sides of the shell 4 can be respectively locked and fixed to the first pipe 1 and the second pipe 2 by using the locking hoop 6 during the gas pipeline connection process, so that the cavity 401 in the shell 4 becomes a closed cavity 401, and the connection node 3 between the first pipe 1 and the second pipe 2 is completely covered and sealed. Since the leakage indicator head 42 is provided on the shell 4, once a leakage occurs at the connection node 3 between the first pipe 1 and the second pipe 2, the leakage problem at the connection node 3 can be accurately and timely monitored through the air pressure change of the cavity 401 monitored by the leakage indicator head 42, which can effectively solve the problem of misjudgment of leakage that is currently prone to occur.

[0039] In addition, after the gas pipeline is connected, it can be directly left at the connection node 3, which can not only play a long-term monitoring effect, but also can provide subsequent protection for the connection node 3. After a gas leak occurs at the connection node 3, it can avoid direct leakage into the air, thereby improving the leakage prevention effect of the entire connection node 3.

[0040] When in use, first, put the shell 4 and the elastic skirt 5 onto the first pipe 1 or the second pipe 2, slide it to one side, and then install the connection node 3. After the connection node 3 is installed, slide the shell 4 and the elastic skirt 5, and place the two elastic skirts 5 on the first pipe 1 and the second pipe 2 respectively, and then adjust the locking clamp 6 to make the cavity 401 in the shell 4 in a closed state, and then use a vacuum pump to extract the air in the cavity 401 to expand the air pressure difference between the cavity 401 and the gas pipeline, and the installation is completed.

[0041] Specifically, Figure 1 As shown, the air leakage indicator head 42 includes an indicator head body 421 communicated with the inner cavity 401 of the housing 4, and an indicator piston 422 disposed in the indicator head body 421 and connected thereto in a sliding and sealing manner;

[0042] The indicator head body 421 is made of transparent plastic;

[0043] An indicating scale 424 is provided on the side wall of the indicating head body 421. By providing the indicating scale 424, it is ensured that after the indicating piston 422 moves, the relative position of the indicating piston 422 and the indicating line on the indicating scale 424 can be accurately determined, and the relative displacement of the indicating piston 422 can be determined to avoid misjudgment.

[0044] Specifically, Figure 1 As shown, in this embodiment, the indicating piston 422 is a layered structure, and the indicating piston 422 includes an indicating layer and at least one sealing layer, and the indicating layer and the sealing layer are coaxially fixedly connected. In this embodiment, the indicating piston 422 includes two sealing layers and an indicating layer, and the indicating layer is located between the two sealing layers. The color of the indicating layer is yellow or red to improve the eye-catching effect.

[0045] Specifically, Figure 1 As shown, in this embodiment, the air leakage indicator head 42 further includes a tension spring 423 disposed in the indicator head body 421, one end of the tension spring 423 is fixedly connected to the indicator head body 421, and the other end is fixedly connected to a side of the indicator piston 422 away from the cavity 401;

[0046] The shell 4 is also provided with a vacuum head body 41 for extracting gas from the cavity 401. By providing the vacuum head body 41 and the vacuum head mouthpiece 412, the cavity 401 in the shell 4 can be evacuated to make the gas pressure in the cavity 401 lower than the external atmospheric pressure, and the pressure difference between the gas pressure in the gas pipeline and the gas pressure in the cavity 401 is increased after the gas pipeline is connected, thereby improving the leak prevention monitoring effect.

[0047] Specifically, Figure 1 As shown, in this embodiment, the exhaust head body 41 includes an elastic section 411, and an exhaust head mouth tightener 412 for tightening the elastic section 411, and the exhaust head mouth tightener 412 is mounted on the elastic section 411. By providing the elastic section 411, the mouth tightening can be performed at the exhaust port of the shell 4, ensuring that the air pressure in the cavity 401 of the shell 4 is continuously lower than the external atmospheric pressure, ensuring a continuous pressure difference between the gas pipeline and the cavity 401, and ensuring a long-term leak-proof monitoring effect.

[0048] Specifically, Figure 1 As shown, in this embodiment, the cross-sectional shape of the housing 4 is circular;

[0049] The shell 4 is made of plastic or rubber;

[0050] The elastic skirt 5 is made of rubber. In this embodiment, the shell 4 is cylindrical, and in some embodiments, the shell 4 may also be drum-shaped. In some embodiments, the cross-sectional shape of the shell 4 may also be rectangular, regular hexagonal, etc., which will not be described in detail.

[0051] In some optional embodiments, the shell 4 is made of rubber, and the shell 4 and the elastic skirt 5 are made by an integrated molding process, which can improve the sealing effect between the shell 4 and the elastic skirt 5.

[0052] Specifically, Figure 1 As shown, in this embodiment, the shell 4 is made of plastic, and circular connecting edges 43 are provided at both ends of the shell 4, and the elastic skirt 5 is bonded and fixed to the connecting edges 43 of the shell 4. The first pipe 1 and the second pipe 2 are respectively penetrated through the two connecting edges 43 on both sides of the shell 4. The shell 4 is made of plastic, which can prevent the shell 4 from being deformed after part of the air is extracted from the inside of the shell 4, resulting in contact and extrusion between the shell 4 and the edge structure of the connection node 3, which affects the service life.

[0053] Specifically, Figure 1As shown, in this embodiment, the shape of the elastic skirt 5 is either trumpet-shaped or circular. In this embodiment, a trumpet-shaped elastic skirt 5 is used to improve the anti-leakage effect after the locking hoop 6 is locked and fixed. The technician can also choose to use a circular elastic skirt 5 to increase the length of the elastic skirt 5 and the number of locking hoops 6.

[0054] Specifically, Figure 1 As shown, in this embodiment, the locking clamp 6 is an adjustable locking clamp 6. The locking clamp 6 is an adjustable locking clamp 6, which can improve the adaptability to the size of the gas pipeline. In this embodiment, the adjustable locking clamp 6 can be made of plastic or metal. The locking clamp 6 is an existing conventional tooling component and is not described here.

[0055] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A gas tightness monitoring device for a gas pipeline connection node, characterized in that: It comprises a shell (4) having a cavity (401), and elastic skirts (5) respectively sealed and fixedly connected to two ends of the shell (4); It also includes at least two locking hoops (6) for sealing and locking the elastic skirt (5) on the first pipe (1) and the second pipe (2); The housing (4) is provided with a gas leakage indicator (42) for real-time monitoring and indicating changes in gas pressure in the cavity (401); The air leakage indicator head (42) comprises an indicator head body (421) in communication with the internal cavity (401) of the housing (4), and an indicator piston (422) disposed in the indicator head body (421) and connected thereto in a sliding and sealing manner; The indicator head body (421) is made of transparent plastic; An indicating scale (424) is provided on the side wall of the indicating head body (421).

2. The gas tightness monitoring device for a gas pipeline connection node according to claim 1, characterized in that: The indicating piston (422) is a layered structure, comprising an indicating layer and at least one sealing layer, wherein the indicating layer and the sealing layer are coaxially fixedly connected.

3. The gas tightness monitoring device for a gas pipeline connection node according to claim 1, characterized in that: The air leakage indicator head (42) further comprises a tension spring (423) disposed in the indicator head body (421); one end of the tension spring (423) is fixedly connected to the indicator head body (421), and the other end of the tension spring (423) is fixedly connected to a side of the indicator piston (422) away from the cavity (401); The shell (4) is also provided with a gas extraction head body (41) for extracting gas from the cavity (401) thereof.

4. The gas tightness monitoring device for a gas pipeline connection node according to claim 3, characterized in that: The air extraction head body (41) comprises an elastic section (411) and an air extraction head mouth tightener (412) for tightening the elastic section (411); the air extraction head mouth tightener (412) is sleeved on the elastic section (411).

5. The gas tightness monitoring device for a gas pipeline connection node according to claim 1, characterized in that: The cross-sectional shape of the shell (4) is annular; The shell (4) is made of plastic or rubber; The elastic skirt (5) is made of rubber.

6. The gas tightness monitoring device for a gas pipeline connection node according to claim 5, characterized in that: The shell (4) is made of rubber material, and the shell (4) and the elastic skirt (5) are made using an integrated molding process.

7. The gas tightness monitoring device for a gas pipeline connection node according to claim 5, characterized in that: The shell (4) is made of plastic material, and annular connecting edges (43) are provided at both ends of the shell (4). The elastic skirt (5) is bonded and fixed to the connecting edges (43) of the shell (4).

8. The gas tightness monitoring device for a gas pipeline connection node according to claim 1, characterized in that: The elastic skirt (5) is in the shape of a trumpet or a circle.

9. The gas tightness monitoring device for a gas pipeline connection node according to claim 1, characterized in that: The locking clamp (6) is an adjustable locking clamp (6).

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