A gas pipeline plugging device

Abstract

The utility model discloses a kind of gas pipeline plugging devices, belong to pipeline maintenance equipment technical field, the plugging device includes connecting structure and sealing mechanism installed on it, the connecting structure includes upper and lower connecting plate and lower connecting plate of cooperation cladding gas pipe, the sealing mechanism includes baffle, screw rod and sliding plate, the baffle is fixed in upper connecting plate, the screw rod is threadedly connected in baffle, the sliding plate is slidably fitted in baffle, and the end of the screw rod is rotatably connected to the sliding plate, by rotating screw rod, sliding plate can be driven reciprocating sliding, to realize the channel formed by the opening in upper connecting plate is quickly plugged or opened. The utility model solves the safety hidden trouble problem that gas pipeline exists gas leakage window period after opening under pressure, with simple structure, convenient operation, can complete temporary plugging in an instant after opening, improve the advantage of operation safety.

Description

Technical Field

[0001] This utility model relates to the field of pipeline maintenance equipment technology, and in particular to a gas pipeline plugging device. Background Technology

[0002] As an important infrastructure for urban energy transmission, the safe and stable operation of gas pipelines is crucial. In the daily maintenance, emergency repair or rerouting of pipelines, it is often necessary to carry out pressurized tapping operations to bring out branch lines or install valves without stopping the gas supply of the main pipeline.

[0003] Existing hot tapping operations typically involve first fixing a set of clamps and valves to the pipeline, then installing a dedicated tapping drill through the valve to drill a hole in the pipeline. After drilling is complete, the operator needs to quickly remove the drill from the valve, then close the valve, and then insert a sealing device, such as an inflatable airbag, through the valve to seal the pipeline.

[0004] However, in the above operation process, there is inevitably a short time window from the complete withdrawal of the drill bit to the complete closure of the valve, or before the subsequent sealing components are fully inserted and take effect. During this time window, the high-pressure gas in the pipeline will be ejected instantly through the newly opened hole. This not only wastes the gas, but more seriously, if there is a source of ignition or static electricity on site, it can easily cause a combustion or explosion accident, posing a huge threat to the life safety of the workers and the surrounding environment.

[0005] Therefore, this utility model proposes a gas pipeline plugging device to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problem that existing gas pipeline plugs lack a rapid temporary sealing mechanism after pressurized opening, resulting in potential gas leakage safety hazards, this utility model aims to provide a gas pipeline plug with an improved structure that can effectively solve the above-mentioned problems.

[0007] This utility model provides a gas pipeline plug, including a connecting structure and a sealing mechanism installed on the connecting structure. The connecting structure includes a lower connecting plate and an upper connecting plate, and the lower connecting plate and the upper connecting plate cooperate to cover the gas pipeline body.

[0008] The sealing mechanism includes a baffle, a screw, and a sliding plate.

[0009] Furthermore, the baffle is fixedly connected to the upper surface of the upper connecting plate, the screw is threadedly connected to the baffle, the sliding plate is slidably fitted to the baffle, and the end of the screw is rotatably connected to the sliding plate. By rotating the screw, the sliding plate can be driven to slide back and forth on the baffle to open or block the channel on the upper connecting plate.

[0010] Preferably, the sealing mechanism further includes a sealing cover, an airbag, and an inflation tube. The sealing cover is fixedly connected to the upper surface of the baffle. The airbag is located inside the sealing cover. One end of the inflation tube communicates with the airbag, and the other end extends out of the sealing cover. This structure is used to lower the airbag into the gas pipe body for inflation and sealing after the sliding plate opens the channel.

[0011] Preferably, the gas pipeline plugger further includes an air pump connected to one end of the inflation tube that extends out of the sealing cover, for providing a power source for the inflation of the airbag and achieving precise control of the plugging pressure.

[0012] Preferably, a positioning post is fixedly connected to the upper surface of the lower connecting plate, and a positioning hole that cooperates with the positioning post is correspondingly opened on the upper connecting plate. Through the cooperation of the positioning post and the positioning hole, the upper connecting plate and the lower connecting plate can be quickly and accurately aligned during the installation process.

[0013] Preferably, the connection between the baffle and the upper connecting plate is a flange connection. Similarly, the connection between the sealing cover and the baffle is also a flange connection. This detachable connection method is not only structurally stable, but also facilitates the installation of sealing gaskets on the connection surface to enhance airtightness.

[0014] Preferably, the upper connecting plate has a light hole, and the lower connecting plate has a threaded hole coaxial with the light hole. The connecting structure is threaded into the threaded hole by a fixing screw passing through the light hole, thereby fastening the upper connecting plate and the lower connecting plate together.

[0015] This utility model has the following beneficial effects: 1. This utility model solves the safety hazard of gas leakage during the gas pipeline pressurized drilling process, which occurs between the removal of the drilling tool and the insertion of the final sealing component. By setting up a temporary sealing mechanism with a sliding plate driven by a screw, this invention achieves the technical effect of instantly sliding and sealing the drilling after drilling, effectively preventing gas leakage and improving the safety of the operation process.

[0016] 2. This utility model integrates the sliding plate mechanism for temporary sealing and the airbag mechanism for final sealing into the same sealing mechanism, which solves the problems of cumbersome sealing operation process, possible replacement of different equipment, and poor operation continuity in the prior art. It achieves the technical effect that all key steps such as drilling, temporary sealing, and lowering of the final sealing component can be completed continuously on the same equipment, simplifying the operation process and improving the operation efficiency and the reliability of sealing throughout the process.

[0017] 3. This utility model solves the problems of difficult alignment, long installation time, and easy positional deviation of existing plugs on pipelines by setting mutually cooperating positioning posts and positioning holes between the upper and lower connecting plates used to clamp the pipeline. It achieves the technical effect of being able to quickly and accurately install the device in the predetermined position, ensuring the accuracy of the opening position, thereby improving the installation efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a gas pipeline plugger proposed in this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the gas pipe body of a gas pipeline plugger proposed in this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing cover of a gas pipeline plugger proposed in this utility model; Figure 4 This is a schematic diagram of the fixing screw part of a gas pipeline plugger proposed in this utility model.

[0019] Legend: 1. Gas pipe body; 2. Connection structure; 201. Lower connecting plate; 202. Upper connecting plate; 203. Positioning post; 204. Fixing screw; 205. Positioning hole; 3. Sealing mechanism; 301. Airbag; 302. Inflation pipe; 303. Air pump; 304. Sealing cover; 305. Baffle; 306. Sliding plate; 307. Screw. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 4This utility model provides a gas pipeline plugging device, which aims to solve the problem of gas leakage safety hazards in existing gas pipeline pressurized drilling operations, from drilling to the insertion of the plugging device.

[0022] like Figure 1 As shown, the gas pipeline plugger includes a connecting structure 2 and a sealing mechanism 3 installed on the connecting structure 2. The connecting structure 2 is used to clamp and fix the entire device to the outer wall of the gas pipe body 1, and the sealing mechanism 3 is used to achieve temporary and final sealing of the gas pipe body 1 after drilling.

[0023] like Figure 2 As shown, the connection structure 2 includes a lower connecting plate 201 and an upper connecting plate 202. The lower connecting plate 201 and the upper connecting plate 202 cooperate to cover the gas pipe body 1. The upper connecting plate 202 and the lower connecting plate 201 are fastened together by fixing screws 204, thereby firmly installing the entire device on the gas pipe body 1.

[0024] like Figure 1 and Figure 3 As shown, the core innovative part of this solution, the sealing mechanism 3 includes a component for temporary sealing. The sealing mechanism 3 includes a baffle 305, a screw 307, and a sliding plate 306. The baffle 305 is fixedly connected to the upper surface of the upper connecting plate 202. A guide rail is provided on the inner wall of the baffle 305. The screw 307 is threadedly connected to the baffle 305. The end of the screw 307 is a threadless part, and the diameter of the threadless part is larger than the diameter of the screw body. The sliding plate 306 is slidably fitted onto the baffle 305. 5. The inner wall guide rail has a groove in the sliding plate 306. The unthreaded part of the screw 307 is fitted into the groove of the sliding plate 306, thus forming a rotational connection between the sliding plate 306 and the screw 307. When the operator rotates the screw 307, the screw 307 moves axially due to the threaded engagement with the baffle 305. Then, through the rotation structure at its end, it drives the sliding plate 306 to slide smoothly back and forth along the guide rail, thereby achieving temporary blocking or opening of the upper channel of the upper connecting plate 202.

[0025] The sealing mechanism 3 also includes a sealing cover 304, an airbag 301, and an inflation tube 302. The sealing cover 304 is detachably fixed to the upper surface of the baffle 305 to form a sealed operating space. The airbag 301 is located inside the sealing cover 304, and the axis of the airbag 301 is coaxially arranged with the channel on the upper connecting plate 202. This alignment ensures that after the sliding plate 306 is opened, the airbag 301 can smoothly descend into the gas pipe body 1 through the channel. One end of the inflation tube 302 is connected to the airbag 301 to deliver gas to the airbag 301. The other end of the inflation tube 302 extends out of the sealing cover 304 to connect with an external gas source. It also includes an air pump 303, which is connected to the end of the inflation tube 302 that extends out of the sealing cover 304 to provide a power source for the inflation of the airbag 301.

[0026] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, to improve the positioning accuracy and efficiency during the installation of the connection structure 2, please refer to... Figure 2 The upper surface of the lower connecting plate 201 is fixedly connected with a positioning post 203, and the upper connecting plate 202 is provided with a positioning hole 205 that cooperates with the positioning post 203. During installation, by inserting the positioning post 203 into the positioning hole 205, the upper connecting plate 202 and the lower connecting plate 201 can be quickly and accurately aligned, ensuring that the subsequent fixing screws 204 can be installed smoothly.

[0027] As another preferred embodiment, in order to achieve reliable sealing and connection between the components, the baffle 305 and the upper connecting plate 202 are connected by a flange. Similarly, the sealing cover 304 and the baffle 305 are also connected by a flange. This flange connection method has a robust structure, strong pressure resistance, and facilitates the installation of sealing gaskets between the flange faces to ensure airtightness.

[0028] In another preferred embodiment, in order to optimize the installation structure of the fixing screw 204, the upper connecting plate 202 is provided with a light hole, and the lower connecting plate 201 is provided with a threaded hole coaxial with the light hole. After the fixing screw 204 passes through the light hole of the upper connecting plate 202, it is directly threaded into the threaded hole of the lower connecting plate 201, so that the fastening force is directly applied between the upper and lower connecting plates, and the clamping effect is better.

[0029] The working principle of this gas pipeline plugging device is as follows: First, the connecting structure 2 is installed on the gas pipe body 1 that needs to be sealed. The upper connecting plate 201 and the lower connecting plate 202 are aligned by inserting the positioning pin 203 into the positioning hole 205. Then, the fixing screw 204 is tightened to make the device firmly clamped on the gas pipe body 1. At this time, the sliding plate 306 is in the open channel position, and the sealing cover 304 is not installed yet.

[0030] Next, a special drilling device is used to drill through the top opening of the baffle 305 to perform a pressurized drilling operation on the gas pipe body 1. After the drilling is completed, the drilling device is quickly withdrawn, and the screw 307 is immediately rotated. The screw 307 drives the sliding plate 306 to slide along the guide rail until it completely covers and blocks the newly opened channel on the upper connecting plate 202, thereby instantly preventing gas leakage and completing the temporary sealing.

[0031] After the sliding plate 306 achieves temporary sealing, since the gas has been isolated, the operator can safely install the sealing cover 304 on the baffle 305 and ensure its sealing through the flange connection. After the external environment is completely sealed, the screw 307 is rotated in the opposite direction to remove the sliding plate 306 and reopen the passage.

[0032] Finally, the airbag 301 is lowered to the predetermined position inside the gas pipe body 1 through the inflation tube 302, and then the air pump 303 is started to inflate the airbag 301, so that the airbag 301 expands and fits tightly against the inner wall of the gas pipe body 1, thereby achieving reliable sealing of the pipeline. After the pipeline maintenance and other operations are completed, the airbag 301 is deflated and retracted, and the normal transmission of gas in the gas pipe body 1 can be restored.

Claims

1. A gas pipeline plugging device, comprising a connecting structure (2), characterized in that, The connection structure (2) includes a lower connecting plate (201) and an upper connecting plate (202) for clamping the gas pipe body (1), and the upper connecting plate (202) and the lower connecting plate (201) are fastened together by fixing screws (204); The feature is that it further includes a sealing mechanism (3), which is mounted on the upper surface of the upper connecting plate (202), and the sealing mechanism (3) includes: A baffle (305) is fixedly connected to the upper surface of the upper connecting plate (202), and a guide rail is provided on the inner wall of the baffle (305). The screw (307) is threaded to the baffle (305), and the end of the screw (307) is an unthreaded part, and the diameter of the unthreaded part is larger than the diameter of the screw (307) body. And a sliding plate (306), which is slidably fitted to the guide rail, and a groove is provided in the sliding plate (306), and the unthreaded part of the screw (307) is fitted into the groove to form a rotatable connection with the sliding plate (306).

2. A gas pipeline plugging device according to claim 1, characterized in that, The sealing mechanism (3) further includes: A sealing cover (304) is fixedly connected to the upper surface of the baffle (305); An airbag (301) is located inside the sealing cover (304), and the axis of the airbag (301) is coaxially arranged with the channel on the upper connecting plate (202); And an inflation tube (302), one end of which is connected to the airbag (301), and the other end of which extends out of the sealing cover (304).

3. A gas pipeline plugging device according to claim 2, characterized in that, It also includes an air pump (303), which is connected to one end of the inflation tube (302) that extends out of the sealing cover (304).

4. A gas pipeline plugging device according to claim 1, characterized in that, The upper surface of the lower connecting plate (201) is fixedly connected with a positioning post (203), and the upper connecting plate (202) is provided with a positioning hole (205) that cooperates with the positioning post (203).

5. A gas pipeline plugging device according to claim 1, characterized in that, The baffle (305) and the upper connecting plate (202) are connected by a flange.

6. A gas pipeline plugging device according to claim 2, characterized in that, The sealing cover (304) and the baffle (305) are connected by a flange.

7. A gas pipeline plugging device according to claim 1, characterized in that, The upper connecting plate (202) has a light hole, and the lower connecting plate (201) has a threaded hole coaxial with the light hole. The fixing screw (204) passes through the light hole and is threaded into the threaded hole.

8. A gas pipeline plugging device according to claim 1, characterized in that, The sliding plate (306) is slidably connected to the inner wall of the baffle (305).

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