CN217951535U

CN217951535U - Stainless steel gas pipeline welding-free connecting structure

Info

Publication number: CN217951535U
Application number: CN202222173953.0U
Authority: CN
Inventors: 林文运
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-12-02
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a welding-free connecting structure of a stainless steel gas pipeline, which comprises an adapter, wherein the end part of the adapter is provided with an external conical ring surface, and the adapter is provided with an external thread section; the end part of the pipe body is provided with an outward expanding flaring shape, the inner hole wall of the flaring shape is provided with an inner conical ring surface, and the inner conical ring surface is matched with the outer conical ring surface; the sealing ring is made of flexible graphite and is of a conical annular structure, and the sealing ring is clamped between the outer conical ring surface and the inner conical ring surface; and the locking nut is screwed on the external thread section and is used for forcing the sealing ring to be clamped between the external conical ring surface and the internal conical ring surface. The utility model has the advantages that: the gas pipeline system has the technical advantages of high connection strength, good reliability and long durability, and can be applied to a gas pipeline system to remarkably improve the gas conveying safety level.

Description

Stainless steel gas pipeline welding-free connecting structure

Technical Field

The utility model belongs to the technical field of natural gas pipeline is sent and is carried, concretely relates to welded connection structure is exempted from to stainless steel gas pipeline.

Background

In recent years, natural gas leakage and explosion accidents frequently occur, which not only causes huge social and economic losses, but also seriously threatens the life and property safety of residents. Therefore, the establishment of a gas pipeline conveying system with high safety level has great significance.

It has been investigated that gas accidents often occur from the connection points of the piping system, which have a relatively low strength for the entire piping system. In the prior art, almost all gas pipeline connections adopt welding connection technology, the welding has extremely strict requirements on construction technology, and the defects of cracks, incomplete penetration, air holes, slag inclusion and the like easily occur by carelessness. In addition, the anti-corrosion treatment of the weld seam also has a very important influence on the reliability of the pipe connection. In each construction link of pipeline welding, flaws appear in any link, so that the reliability and the service life of pipeline connection are reduced, and potential safety hazards are invisibly buried. On the other hand, if the conventional pipe connection technology is directly adopted, for example: in the water pipe connection technology, because the plastic sealing ring needs to be arranged in the connection mode, the technical problems of low reliability and short service life also exist, and the safety of the gas delivery cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a stainless steel gas pipeline exempts from welded connection structure has joint strength height, good reliability, the long technical advantage of durability, uses in gas piping system, can show to promote the gas and carry the security level.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a welded connection structure is exempted from to stainless steel gas pipeline which the key lies in, includes:

the end part of the adapter is provided with an external conical ring surface, and the adapter is provided with an external thread section;

the end part of the pipe body is provided with an outward expanding flaring shape, the inner hole wall of the flaring shape is provided with an inner conical ring surface, and the inner conical ring surface is matched with the outer conical ring surface;

the sealing ring is made of flexible graphite and is of a conical annular structure, and the sealing ring is clamped between the outer conical ring surface and the inner conical ring surface; and

and the locking nut is screwed on the external thread section and is used for forcing the sealing ring to be clamped between the external conical ring surface and the internal conical ring surface.

Preferably, the locking nut has an internal thread section at one end and an annular positioning section extending radially inward at the other end.

Preferably, the taper of the outer conical ring surface and the taper of the inner conical ring surface are 30-45 degrees.

Preferably, the taper of the outer and inner tapered annuli is 37 °.

Preferably, the wall thickness of the sealing ring is 0.4 to 0.8mm.

Preferably, the wall thickness of the sealing ring is 0.5mm.

Compared with the prior art, the beneficial effects of the utility model are that:

1. adopt flexible graphite as sealing element to with sealing element clamp between two conical surface, not only sealing performance is excellent, reliability and durability are good moreover, use in gas pipe-line system, can show the security level that promotes the gas and carry.

2. In the installation process of the gas pipeline, welding construction is not needed, the technical advantages of convenience in installation, high connection strength and good reliability are achieved, and the commercial application prospect is wide.

Drawings

FIG. 1 is an exploded view of a weld-free connection structure for a stainless steel gas pipeline;

FIG. 2 is a cross-sectional view of a weld-free connection for a stainless steel gas pipeline.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1 and 2, the welding-free connection structure for the stainless steel gas pipeline relates to four parts, namely an adapter 1, a pipe body 2, a sealing ring 3 and a locking nut 4. Adapter 1 and body 2 are stainless steel. Wherein, the end of adapter 1 is equipped with outer toper anchor ring 1a. The end part of the pipe body 2 is provided with a flaring molding 2b which expands outwards, and the inner hole wall of the flaring molding 2b is provided with an inner conical ring surface 2a which is matched with the outer conical ring surface 1a. The sealing ring 3 is a conical ring structure, and the sealing ring 3 is made of flexible graphite and is clamped between the outer conical ring surface 1a and the inner conical ring surface 2a. The lock nut 4 has an internal thread section 4b at one end and an annular positioning section 4a extending radially inward at the other end.

During assembly, the internal thread section 4b of the locking nut 4 is screwed on the external thread section 1b, the annular positioning part 4a is tightly propped against the outer side of the flaring molding 2b, and the sealing ring 3 can be tightly clamped between the external conical ring surface 1a and the internal conical ring surface 2a. At the hookup location, adopt the flaring design that has the tapering to add flexible graphite sealing ring, whole pipeline connection structure has extremely reliable joint strength, and flexible graphite has ageing-resistant, anti fire-retardant advantage as sealing element, and the gas pipeline can reach the life the same with the building.

When the pipe joint is implemented specifically, the adapter 1 may be integrally formed on another pipe connected to the pipe body 2, and an external conical ring surface 1a and an external threaded section 1b may be simultaneously provided at the left and right ends of the adapter 1, so as to realize the connection between two adjacent pipe bodies.

In this embodiment, to further ensure the connection reliability, the taper of the outer conical ring surface 1a and the inner conical ring surface 2a is selected from 30 to 45 °, and the optimum choice is 37 °. The taper of the sealing ring 3 also corresponds to the outer conical ring surface 1a and the inner conical ring surface 2a, and is optimally chosen to be 37.

In the present embodiment, in order to further ensure the sealing performance of the joint sealing ring 3, the thickness thereof is selected from 0.4 to 0.8mm, and the most preferable thickness is 0.5mm.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. The utility model provides a welded connection structure is exempted from to stainless steel gas pipeline which characterized in that includes:

the adapter comprises an adapter (1), wherein the end part of the adapter is provided with an outer conical ring surface (1 a), and an outer threaded section (1 b) is arranged on the adapter (1);

the end part of the pipe body (2) is provided with a flaring molding (2 b) which expands outwards, the inner hole wall of the flaring molding (2 b) is provided with an inner conical ring surface (2 a), and the inner conical ring surface (2 a) is adapted to the outer conical ring surface (1 a);

the sealing ring (3) is made of flexible graphite and is of a conical annular structure, and the sealing ring (3) is clamped between the outer conical ring surface (1 a) and the inner conical ring surface (2 a); and

a lock nut (4) screwed onto said external threaded section (1 b) for forcing the sealing ring (3) to be clamped between the external conical ring surface (1 a) and the internal conical ring surface (2 a).

2. The stainless steel gas pipeline welding-free connection structure of claim 1, wherein: one end of the locking nut (4) is provided with an internal thread section (4 b), and the other end of the locking nut is provided with an annular positioning part (4 a) extending inwards along the radial direction.

3. The stainless steel gas pipeline welding-free connection structure of claim 1, wherein: the conicity of the outer conical ring surface (1 a) and the conicity of the inner conical ring surface (2 a) are 30-45 degrees.

4. The stainless steel gas pipeline welding-free connection structure according to claim 3, wherein: the conicity of the external conical ring surface (1 a) and the internal conical ring surface (2 a) is 37 degrees.

5. The stainless steel gas pipeline welding-free connection structure of claim 1, characterized in that: the wall thickness of the sealing ring (3) is 0.4-0.8 mm.

6. The stainless steel gas pipeline welding-free connection structure of claim 5, wherein: the wall thickness of the sealing ring (3) is 0.5mm.