Welding structure for preventing corrugated pipe from leaking

Abstract

The utility model relates to the technical field of pipeline welding, in particular to a corrugated pipe leakage prevention welding structure which comprises a flange plate, a positioning hole, a positioning seat, an external thread, an internal thread, a corrugated pipe, a positioning groove, a high-temperature sealing ring and a surfacing layer. The positioning holes are formed in the periphery of the bottom of the flange plate; the positioning seat is installed on the inner wall of the flange plate, and the positioning seat and the flange plate are of an integrated structure. The external thread is arranged on the outer wall of one end of the positioning seat; the corrugated pipe is connected with the external threads on the positioning seat through the internal threads in a rotating manner; the positioning groove is formed in one end of the inner wall of the corrugated pipe; by improving the welding structure for preventing the corrugated pipe from leaking, the welding structure for preventing the corrugated pipe from leaking has the advantages of being reasonable in structural design, convenient to position when the corrugated pipe and the flange plate are welded, firm in welding of the corrugated pipe and the flange plate and good in sealing performance after welding, and therefore the problems and defects in the prior art and equipment are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, and more specifically, to a welding structure for preventing a bellows from leaking. Background Art

[0002] Pipeline welding is the key to ensure pipeline tightness and strength, the key to ensure pipeline quality, and an important condition for ensuring pipeline safety production. Large-scale oil and gas pipelines are generally large-diameter, long-distance metal pipelines that require a high-quality and efficient welding process. At present, a widely used welding construction technology in my country is the metal pipeline downward welding process. This technology is widely used in the construction of oil and gas metal pipelines in my country for its advantages of fast welding speed, good welding quality, beautiful shape, smooth and uniform back of the weld, saving welding materials, reducing process difficulty and labor intensity of workers, etc.

[0003] The existing positioning of the bellows and the flange during welding is mainly based on spot welding around the connection between the bellows and the flange. This may not only pierce the bellows and cause leakage, but also the bellows and the flange are easily deformed due to instantaneous high temperature during spot welding, affecting the welding quality.

[0004] In view of this, research and improvement are conducted on the existing problems, and a welding structure is provided to prevent the leakage of bellows, aiming to achieve the purpose of solving the problem and improving the practical value through this technology. Utility Model Content

[0005] The utility model aims to provide a welding structure for preventing a bellows from leaking, so as to solve the problems and shortcomings raised in the above-mentioned background technology.

[0006] In order to achieve the above object, the utility model provides a welding structure for preventing the leakage of a bellows, which is achieved by the following specific technical means:

[0007] A welding structure for preventing a bellows from leaking comprises: a flange, a positioning hole, a positioning seat, an external thread, an internal thread, a bellows, a positioning groove, a high-temperature sealing ring, and a surfacing layer; the positioning holes are arranged around the bottom of the flange; the positioning seat is installed on the inner wall of the flange, and the positioning seat and the flange are an integrated structure; the external thread is arranged on the outer wall at one end of the positioning seat; the bellows is connected to the external thread on the positioning seat by rotation through the internal thread; the positioning groove is arranged at one end of the inner wall of the bellows; the high-temperature sealing ring is installed inside the positioning groove, and the high-temperature sealing ring is plug-connected to the positioning groove; the surfacing layer is installed between the flange and the bellows by welding.

[0008] As a further optimization of the technical solution, the utility model provides a welding structure for preventing bellows leakage, wherein the outer wall of one end of the positioning seat is provided with an external thread engaging with the internal thread on the inner wall of the bellows, and the other end of the positioning seat is fixedly connected to the flange to form an integrated structure.

[0009] As a further optimization of the technical solution, the utility model provides a welding structure for preventing bellows leakage, wherein the outer wall of one end of the bellows has an inverted angle of forty-five degrees, and one end of the bellows abuts against the flange.

[0010] As a further optimization of the technical solution, the utility model provides a bellows leakage prevention welding structure, wherein a positioning groove is provided on the inner wall of one end of the bellows, and a high-temperature sealing ring is inserted and installed in the positioning groove.

[0011] As a further optimization of the technical solution, the utility model provides a welding structure for preventing bellows leakage, wherein two sides of the high-temperature sealing ring are respectively in contact with the flange and the bellows.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] 1. The outer wall of one end of the positioning seat of the utility model is provided with an external thread that meshes with the internal thread on the inner wall of the bellows, and the other end of the positioning seat is fixedly connected to the flange as an integrated structure. The outer wall of one end of the bellows has a forty-five-degree bevel, and one end of the bellows is abutted against the flange. One end of the positioning seat is engaged with the internal thread on the inner wall of the bellows by rotation, so that one end of the bellows abuts against the flange, which is convenient for positioning the bellows and the flange. The outer wall of one end of the bellows has a forty-five-degree bevel, which increases the welding area of ​​the cladding layer on the bellows and the flange, and improves the firmness of the connection between the bellows and the flange.

[0014] 2. A positioning groove is provided on the inner wall of one end of the bellows of the utility model, and a high-temperature sealing ring is inserted and installed in the positioning groove. The two sides of the high-temperature sealing ring are respectively abutted against the flange and the bellows. A high-temperature sealing ring is inserted and installed in the positioning groove on the inner wall of one end of the bellows, and the high-temperature sealing ring abuts between the flange and the bellows, thereby improving the sealing performance of the bellows and the flange after welding.

[0015] 3. The utility model improves a welding structure for preventing bellows leakage, has the advantages of reasonable structural design, easy positioning when welding the bellows and the flange, firm welding of the bellows and the flange, and good sealing performance after welding, thereby effectively solving the problems and shortcomings in the existing technology and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the bellows structure of the utility model;

[0021] Figure 5 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0022] In the figure: flange 1, positioning hole 2, positioning seat 3, external thread 4, internal thread 5, bellows 6, positioning groove 7, high temperature sealing ring 8, and surfacing layer 9. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] See also Figures 1 to 5 The utility model provides a specific technical implementation scheme for preventing the welding structure of the bellows from leaking:

[0025] A welding structure for preventing a bellows from leaking comprises: a flange 1, a positioning hole 2, a positioning seat 3, an external thread 4, an internal thread 5, a bellows 6, a positioning groove 7, a high-temperature sealing ring 8, and a surfacing layer 9; the positioning hole 2 is arranged around the bottom of the flange 1.

[0026] The positioning seat 3 is installed on the inner wall of the flange 1, and the positioning seat 3 and the flange 1 are an integrated structure; an external thread 4 meshing with the internal thread 5 on the inner wall of the bellows 6 is provided on the outer wall of one end of the positioning seat 3, and the other end of the positioning seat 3 is fixedly connected to the flange 1 as an integrated structure, the outer wall of one end of the bellows 6 has a forty-five-degree bevel, and one end of the bellows 6 is abutted against the flange 1. One end of the positioning seat 3 is engaged with the internal thread 5 on the inner wall of the bellows 6 by rotation, so that one end of the bellows 6 abuts against the flange 1, which is convenient for positioning the bellows 6 and the flange 1, and the outer wall of one end of the bellows 6 has a forty-five-degree bevel, which increases the welding area of ​​the cladding layer 9 on the bellows 6 and the flange 1, and improves the firmness of the bellows 6 when connected to the flange 1.

[0027] The external thread 4 is formed on the outer wall of one end of the positioning seat 3 .

[0028] The bellows 6 is connected to the external thread 4 on the positioning seat 3 through the internal thread 5 by rotation; a positioning groove 7 is opened on the inner wall of one end of the bellows 6, and a high-temperature sealing ring 8 is inserted and installed in the positioning groove 7, and the two sides of the high-temperature sealing ring 8 are respectively abutted against the flange 1 and the bellows 6, and a high-temperature sealing ring 8 is inserted and installed in the positioning groove 7 on the inner wall of one end of the bellows 6, and the high-temperature sealing ring 8 abuts between the flange 1 and the bellows 6, thereby improving the sealing performance of the bellows 6 after welding with the flange 1.

[0029] The positioning groove 7 is provided at one end of the inner wall of the bellows 6; the high temperature sealing ring 8 is installed inside the positioning groove 7, and the high temperature sealing ring 8 is plug-connected with the positioning groove 7; the cladding layer 9 is installed between the flange 1 and the bellows 6 by welding.

[0030] Specific implementation steps:

[0031] When in use, first insert the high-temperature sealing ring 8 into the positioning groove 7 at one end of the inner wall of the bellows 6, and then rotate one end of the positioning seat 3 so that its end engages with the internal thread 5 on the inner wall of the bellows 6, and one end of the positioning seat 3 and the flange 1 are an integrated structure, which makes one end of the bellows 6 abut against the flange 1, making it easy to position the bellows 6 and the flange 1 during welding. During welding, since the outer wall of one end of the bellows 6 has a forty-five degree bevel, the welding area of ​​the cladding layer 9 on the bellows 6 and the flange 1 is increased, thereby improving the firmness of the connection between the bellows 6 and the flange 1.

[0032] To sum up: this kind of bellows leakage prevention welding structure has an external thread on the outer wall of one end of the positioning seat that meshes with the internal thread on the inner wall of the bellows, and the other end of the positioning seat is fixedly connected to the flange as an integrated structure, the outer wall of one end of the bellows has a forty-five-degree bevel, and one end of the bellows is abutted against the flange, one end of the positioning seat is rotated to mesh with the internal thread on the inner wall of the bellows, so that one end of the bellows is abutted against the flange, which is convenient for positioning the bellows and the flange, and the outer wall of one end of the bellows has a forty-five-degree bevel, which increases the welding area of ​​the cladding layer on the bellows and the flange, and improves the connection between the bellows and the flange. The bellows has a locating groove on the inner wall at one end, and a high-temperature sealing ring is installed in the locating groove. The two sides of the high-temperature sealing ring are respectively abutted against the flange and the bellows. The high-temperature sealing ring is installed in the locating groove on the inner wall at one end of the bellows. The high-temperature sealing ring abuts against the flange and the bellows, thereby improving the sealing performance of the bellows and the flange after welding. By improving a welding structure for preventing bellows leakage, the bellows has the advantages of reasonable structural design, easy positioning when welding the bellows and the flange, firm welding of the bellows and the flange, and good sealing performance after welding, thereby effectively solving the problems and shortcomings in the existing technology and equipment.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding structure for preventing a bellows from leaking, comprising: A flange (1), a positioning hole (2), a positioning seat (3), an external thread (4), an internal thread (5), a bellows (6), a positioning groove (7), a high-temperature sealing ring (8), and a cladding layer (9); characterized in that: the positioning hole (2) is provided around the bottom of the flange (1); the positioning seat (3) is installed on the inner wall of the flange (1), and the positioning seat (3) and the flange (1) are an integrated structure; the external thread (4) is provided on the outer wall of one end of the positioning seat (3); the bellows (6) is connected to the external thread (4) on the positioning seat (3) by rotation through the internal thread (5); the positioning groove (7) is provided at one end of the inner wall of the bellows (6); the high-temperature sealing ring (8) is installed inside the positioning groove (7), and the high-temperature sealing ring (8) is plug-connected to the positioning groove (7); the cladding layer (9) is installed between the flange (1) and the bellows (6) by welding.

2. A bellows leakage prevention welding structure according to claim 1, characterized in that: An external thread (4) is provided on the outer wall of one end of the positioning seat (3) and meshes with an internal thread (5) on the inner wall of the bellows (6), and the other end of the positioning seat (3) is fixedly connected to the flange (1) to form an integrated structure.

3. A bellows leakage prevention welding structure according to claim 1, characterized in that: The outer wall of one end of the bellows (6) is inclined at a forty-five degree angle, and one end of the bellows (6) is in contact with the flange (1).

4. A bellows leakage prevention welding structure according to claim 1, characterized in that: A positioning groove (7) is provided on the inner wall of one end of the bellows (6), and a high-temperature sealing ring (8) is inserted and installed in the positioning groove (7).

5. The bellows leakage prevention welding structure according to claim 1, characterized in that: The two sides of the high-temperature sealing ring (8) are respectively in contact with the flange (1) and the bellows (6).

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