A natural gas pipeline welding auxiliary device

Abstract

The utility model relates to natural gas pipeline welding technical field discloses a kind of natural gas pipeline welding auxiliary devices, including the first connecting assembly being arranged in the one end of natural gas pipeline and the second connecting assembly being arranged in the other end of natural gas pipeline, when adjacent natural gas pipeline is welded, adjacent natural gas pipeline is connected and is mutually limited by the first connecting assembly and the second connecting assembly, and the containing cavity for containing welding slag, electrode residue is formed by the cooperation of first connecting assembly and second connecting assembly enclosure.This utility model can avoid welding slag, electrode residue fall into pipeline, reduce the quantity and frequency of replacing filter screen of filtering and separating equipment, avoid the channel of gas flow occupied due to the filter screen blockage of filtering and separating equipment caused by welding slag, electrode residue, improve pipeline transportation natural gas efficiency.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pipeline welding technology, and specifically to a natural gas pipeline welding auxiliary device. Background Technology

[0002] Natural gas pipelines are typically made of steel pipes, but the length of a single steel pipe is limited by transportation and manufacturing processes, so a long-distance oil and gas pipeline needs to be connected by multiple steel pipes. When multiple steel pipes are connected, adjacent steel pipes are welded together. During welding, weld slag and welding rod residue are generated, which can easily fall into the steel pipe.

[0003] Before a natural gas pipeline is put into operation, the inside of the pipeline must be purged with clean air to remove impurities such as welding slag and welding rod residue. However, in actual engineering construction, due to the limitations of gas purging pressure and the method of purging effect detection, even after multiple purgings, a small amount of welding slag and welding rod residue remains in the pipeline.

[0004] When a natural gas pipeline is in operation, the high-pressure, high-flow-rate natural gas will carry these impurities in the pipeline downstream. The impurities will converge at the filtration and separation equipment, clogging the filter screen and reducing the efficiency of natural gas transportation in the pipeline. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a welding auxiliary device for natural gas pipelines, which can prevent welding slag and welding rod residue from falling into the pipeline, reduce the number and frequency of filter screen replacements, avoid filter screen blockage caused by welding slag and welding rod residue, and improve the efficiency of natural gas transportation in pipelines.

[0006] The technical solution adopted by this utility model is as follows: A natural gas pipeline welding auxiliary device includes a first connecting component disposed in one end of a natural gas pipeline and a second connecting component disposed in the other end of a natural gas pipeline. When welding adjacent natural gas pipelines, the adjacent natural gas pipelines are connected and mutually limited by the first connecting component and the second connecting component. The first connecting component and the second connecting component cooperate to form a cavity for accommodating welding slag and welding rod residue.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention, by setting up a first connecting component and a second connecting component, allows adjacent natural gas pipelines to be quickly connected and mutually restrained, facilitating welding operations and improving welding efficiency. Simultaneously, the receiving cavity formed by the first and second connecting components collects welding slag and electrode residue generated during welding. During welding, these impurities fall directly into the receiving cavity instead of into the natural gas pipeline, reducing the amount of impurities inside the pipeline. This significantly reduces the number and frequency of filter replacements required during natural gas pipeline operation, saving labor and time costs. Furthermore, since there are almost no residual fine welding slag and electrode residue in the pipeline, filter blockage caused by welding slag and electrode residue is avoided during natural gas transportation, ensuring the efficiency of natural gas pipeline transportation.

[0008] In a preferred embodiment of the present invention, the first connecting component includes a first connecting ring, a first abutting ring, and limiting holes circumferentially spaced on the first connecting ring. The first connecting ring is connected to the inner wall of the natural gas pipeline, and the outer end face of the first connecting ring is connected to the first abutting ring. The outer end face of the first abutting ring and the outer end face of the natural gas pipeline are located on the same horizontal plane. The second connecting component includes a second connecting ring, a second abutting ring, and limiting posts circumferentially spaced on the second connecting ring. The second connecting ring is connected to the inner wall of the natural gas pipeline, and the outer end face of the second connecting ring is connected to the second abutting ring. The outer end face of the second abutting ring and the outer end face of the natural gas pipeline are located on the same horizontal plane. When the end faces of adjacent natural gas pipelines are fitted together, the first abutting ring and the second abutting ring fit together, and the limiting post extends into the corresponding limiting hole. The first connecting ring, the first abutting ring, the inner wall of the adjacent natural gas pipeline, the second abutting ring, and the second connecting ring cooperate to form a cavity for accommodating welding slag and welding rod residue.

[0009] Beneficial effects: The limiting post and limiting hole work together to allow adjacent natural gas pipelines to connect quickly and limit each other, preventing adjacent natural gas pipelines from sliding against each other and failing to align quickly. The first connecting ring, the first abutting ring, the inner wall of the adjacent natural gas pipeline, the second abutting ring, and the second connecting ring work together to form a cavity for containing welding slag and welding rod residue, preventing welding slag and welding rod residue from falling into the pipeline.

[0010] In a preferred embodiment of the present invention, the second connecting component further includes a plurality of limiting rings sleeved on the corresponding limiting posts. When the limiting posts extend into the corresponding limiting holes, the limiting rings abut against the outer end face of the first connecting ring.

[0011] Beneficial effects: The limiting ring can completely seal the limiting hole, preventing welding slag from splashing into the pipeline through the hole, and also ensuring that natural gas does not enter the receiving cavity through the hole during natural gas transportation.

[0012] In a preferred embodiment of this utility model, the limiting hole is a stepped hole, and when the limiting post extends into the corresponding limiting hole, the limiting ring fits against the first step surface of the stepped hole.

[0013] Beneficial effects: The limiting ring and the first step surface of the stepped hole fit together, further ensuring that the limiting ring and the first connecting ring fit tightly together, preventing welding slag from splashing into the pipeline through the pores, and also ensuring that natural gas does not enter the receiving cavity through the pores during natural gas transportation.

[0014] In a preferred embodiment of this invention, the limiting ring and the first connecting ring are magnetically connected.

[0015] Beneficial effects: It increases the connection strength of adjacent natural gas pipelines before welding, prevents relative displacement of adjacent natural gas pipelines during welding, ensures that the limiting post is always within the limiting hole, and can also buffer the vibration generated during welding to a certain extent, reducing the impact on the pipeline connection, and further improving the quality and stability of natural gas pipeline welding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the natural gas pipeline welding auxiliary device of this utility model; Figure 2 This is a schematic diagram of the structure of the first connecting component of the natural gas pipeline welding auxiliary device of this utility model; Figure 3 This is a structural schematic diagram of the first connecting component of the natural gas pipeline welding auxiliary device of this utility model from another angle; Figure 4 This is a schematic diagram of the structure of the second connecting component of the natural gas pipeline welding auxiliary device of this utility model. Detailed Implementation

[0017] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0018] In the description of this application, the terms "first," "second," "side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] The reference numerals in the attached drawings include: natural gas pipeline 1, first connecting ring 201, first abutting ring 202, limiting hole 203, second connecting ring 301, second abutting ring 302, limiting post 303, and limiting ring 304.

[0021] Explanation: When welding natural gas pipelines, welding rods that match the pipeline material must be used. During the welding process, the welding rod is heated and melted by an electric arc, fusing with the base material at the pipeline gap to form a weld.

[0022] Example 1 A natural gas pipeline welding auxiliary device includes a first connecting assembly disposed within one end of the natural gas pipeline 1 and a second connecting assembly disposed within the other end of the natural gas pipeline 1, such as... Figure 1 As shown, when adjacent natural gas pipelines 1 are welded, the adjacent natural gas pipelines 1 are connected and mutually limited by a first connecting component and a second connecting component. The first connecting component and the second connecting component cooperate to form a cavity for accommodating welding slag and welding rod residue.

[0023] In this embodiment, the natural gas pipeline is externally welded.

[0024] like Figure 2 As shown, the first connecting assembly includes a first connecting ring 201, a first abutting ring 202, and limiting holes 203 circumferentially spaced on the first connecting ring 201. The first connecting ring 201 is connected to the inner wall of the natural gas pipeline 1, and the outer end face of the first connecting ring 201 is connected to the first abutting ring 202. The outer end face of the first abutting ring 202 and the outer end face of the natural gas pipeline 1 are located on the same horizontal plane. Figure 3 As shown, the limiting hole 203 is a stepped hole. When the limiting post 303 extends into the corresponding limiting hole 203, the limiting ring 304 fits against the first step surface of the stepped hole.

[0025] In this embodiment, the surface closest to the outer end of the pipe is referred to as the outer end surface.

[0026] like Figure 4 As shown, the second connecting assembly includes a second connecting ring 301, a second abutment ring 302, a limiting post 303 circumferentially spaced on the second connecting ring 301, and a plurality of limiting rings 304 sleeved on the corresponding limiting post 303. The second connecting ring 301 is connected to the inner wall of the natural gas pipeline 1, and the outer end face of the second connecting ring 301 is connected to the second abutment ring 302. The outer end face of the second abutment ring 302 and the outer end face of the natural gas pipeline 1 are located on the same horizontal plane. When the limiting post 303 extends into the corresponding limiting hole 203, the limiting ring 304 abuts against the outer end face of the first connecting ring 201. The limiting ring 304 and the first connecting ring 201 are magnetically connected. In this embodiment, the limiting ring 304 and the first step surface of the stepped hole on the first connecting ring 201 are magnetically connected.

[0027] When the end faces of adjacent natural gas pipelines 1 are fitted together, the first abutting ring 202 and the second abutting ring 302 fit together, and the limiting post 303 extends into the corresponding limiting hole 203. The first connecting ring 201, the first abutting ring 202, the inner wall of the adjacent natural gas pipeline 1, the second abutting ring 302, and the second connecting ring 301 cooperate to form a receiving cavity for accommodating welding slag.

[0028] In this embodiment, the connection between the first connecting ring, the second connecting ring and the natural gas pipeline can be either welding (the welding is done during production, and there is no residual welding slag in each natural gas pipeline when connecting adjacent natural gas pipelines) or snap-fit. When snap-fit, the outer end face of the natural gas pipeline is provided with multiple slots that pass through both ends in a circumferential manner, and the outer edges of the first connecting ring and the second connecting ring are provided with multiple posts in a circumferential manner, which can extend into the slots.

[0029] In this embodiment, the two ends through which the slot passes are the inner wall of the natural gas pipeline and the outer end face of the natural gas pipeline, respectively.

[0030] Example 2 This embodiment is basically the same as embodiment 1, except that the diameter of the first abutting ring 202 is larger than the diameter of the second abutting ring 302, the second abutting ring 302 can extend into the first abutting ring 202, the first abutting ring 202 abuts against the end face of the second connecting ring 302, and the outer wall of the second abutting ring 302 fits against the inner wall of the first abutting ring 202.

[0031] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A welding auxiliary device for natural gas pipelines, characterized in that: It includes a first connecting component installed in one end of a natural gas pipeline and a second connecting component installed in the other end of a natural gas pipeline. When adjacent natural gas pipelines are welded, the adjacent natural gas pipelines are connected and mutually limited by the first connecting component and the second connecting component. The first connecting component and the second connecting component cooperate to form a cavity for accommodating welding slag and welding rod residue.

2. The natural gas pipeline welding auxiliary device according to claim 1, characterized in that: The first connecting component includes a first connecting ring, a first abutting ring, and limiting holes circumferentially spaced on the first connecting ring. The first connecting ring is connected to the inner wall of the natural gas pipeline, and the outer end face of the first connecting ring is connected to the first abutting ring. The outer end face of the first abutting ring and the outer end face of the natural gas pipeline are located on the same horizontal plane. The second connecting component includes a second connecting ring, a second abutting ring, and limiting posts circumferentially spaced on the second connecting ring. The second connecting ring is connected to the inner wall of the natural gas pipeline, and the outer end face of the second connecting ring is connected to the second abutting ring. The outer end face of the second abutting ring and the outer end face of the natural gas pipeline are located on the same horizontal plane. When the end faces of adjacent natural gas pipelines are fitted together, the first abutting ring and the second abutting ring fit together, and the limiting post extends into the corresponding limiting hole. The first connecting ring, the first abutting ring, the inner wall of the adjacent natural gas pipeline, the second abutting ring, and the second connecting ring cooperate to form a receiving cavity for accommodating welding slag.

3. The natural gas pipeline welding auxiliary device according to claim 2, characterized in that: The second connecting component also includes multiple limiting rings sleeved on the corresponding limiting posts. When the limiting posts extend into the corresponding limiting holes, the limiting rings abut against the outer end face of the first connecting ring.

4. The natural gas pipeline welding auxiliary device according to claim 3, characterized in that: The limiting hole is a stepped hole. When the limiting post extends into the corresponding limiting hole, the limiting ring fits against the first step surface of the stepped hole.

5. The natural gas pipeline welding auxiliary device according to claim 3, characterized in that: The limiting ring and the first connecting ring are magnetically connected.

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