CN208058170U - A kind of soldering opening of helix tube - Google Patents

Abstract

The utility model discloses a welding port of a spiral pipe, which comprises a pipe joint A end and a pipe joint B end. The pipe joint A end and the pipe joint B end are welded. The pipe wall of the convex front end is provided with a sealing groove and a sealing ring matching the sealing groove, the convex root is provided with an annular groove, the outer side of the convex root is provided with a protective layer, and the B end of the pipe interface is a concave structure. The utility model uses a protective layer composed of a fire-resistant heat insulation layer and an anti-corrosion layer to protect the coating or lining of the inner wall of the pipeline, and uses a sealing ring to effectively prevent the transported mesons from corroding the welding joint. The structure is simple and the construction is convenient. low cost.

Description

Welding port of a spiral pipe

technical field

The utility model belongs to the construction field of a spiral pipe, in particular to a welding port of a spiral pipe.

Background technique

In the heating, petroleum and petrochemical industries, the corrosion of steel pipelines is extremely serious. In order to prevent or slow down or early corrosion and improve the service life of pipelines, coatings and linings are generally added to the inner walls of steel pipelines. As for the interface of the pipeline, the economical, reliable and relatively mature welding method is generally used for connection. After the welding joint is constructed, it is difficult to carry out anti-corrosion treatment inside the joint. The high temperature of welding will also damage the coating and lining around the welding, making the coating or lining invalid, losing the protective function, and then the welding will be corroded And make it weak, resulting in perforation or cracking, which constitutes a potential hidden danger to the service life of the entire pipeline, and also poses a threat to the environment around the pipeline and the lives and properties of residents.

Contents of the invention

Aiming at the above-mentioned technical problems, in order to make up for the deficiencies of the prior art, the utility model proposes a welding joint of a spiral pipe, which is easy to use, simple in structure and solves the problem of welding joint corrosion.

In order to achieve the above object, the utility model adopts the following technical scheme. The utility model includes a pipeline interface A end and a pipeline interface B end. The pipeline interface A end and the pipeline interface B end are welded, and the pipeline interface A end is a convex structure. The pipe wall of the convex front end of the convex structure is provided with a sealing groove and a sealing ring matching the sealing groove, the convex root is provided with an annular groove, the outer side of the convex root is provided with a protective layer, and the B end of the pipe interface is a concave shape structure.

Preferably, the protective layer is composed of a fire-resistant and heat-insulating layer and an anti-corrosion layer.

Preferably, the number of sealing grooves is multiple, and the number of sealing rings is any number from one to less than the number of sealing grooves.

Further, the inner wall of the pipe joint A end and the pipe joint B end is provided with an anti-corrosion layer, and the anti-corrosion layer is a coating or a lining.

The utility model is characterized in that:

Use the existing and relatively mature welding process for welding without other auxiliary equipment; use the protective layer composed of fire-resistant heat insulation layer and anti-corrosion layer to protect the coating or lining of the inner wall of the pipeline; use the sealing ring to effectively It can prevent the transported mesons from corroding to the welding joint; it is easy to use and easy to construct.

Compared with the prior art, the utility model has the advantages of easy manufacture, simple construction, low cost, wide application range and good anti-corrosion effect.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the pipeline interface A end of the present utility model;

In the figure: 1-Pipeline interface A-end, 2-Pipeline interface B-end, 3-Protective layer, 4-Sealing groove, 5-Anticorrosion layer, 6-Sealing ring.

Detailed ways

The utility model will be further explained below in conjunction with specific embodiments, but it is not limited to the utility model. The structures, proportions, sizes, etc. shown in the drawings of the specification are only used to match the content disclosed in the specification for reference. Those who are familiar with this technology understand and read, not to limit the limited conditions that the utility model can implement, so it has no technical substantive significance, any modification of structure, change of proportional relationship or adjustment of size will not affect the utility model The effects that can be produced and the goals that can be achieved should still fall within the scope covered by the technical content disclosed in the utility model. At the same time, terms such as "upper", "lower", "front", "rear", and "middle" quoted in this specification are only for the convenience of description, and are not used to limit the practicable scope of the present utility model. The change or adjustment of the relative relationship between the range and the technical content shall also be regarded as the implementable scope of the present utility model without substantive changes in the technical content.

As shown in Figure 1, a welded joint of a spiral pipe is mainly aimed at the joint connected to the pipeline by electric welding. At present, the inner wall of the steel pipeline is coated with an anti-corrosion coating, but the joint of the pipeline is welded It is more difficult to carry out anti-corrosion treatment afterward, and the coating around the joint will deteriorate and fail due to high temperature during the welding process. This joint includes pipe joint A end 1, pipe joint B end 2, and pipe joint A end 1 is convex structure, the convex front end of the convex structure is provided with a sealing groove 4, and a high temperature resistant and corrosion-resistant sealing ring 6 is installed on the sealing groove 4. The number of sealing grooves 4 is multiple, and the number of sealing rings 6 is one to less than the sealing ring. Any number of grooves 4 can be used to prevent the mesons transported in the pipeline from penetrating into the welding joint through the sealing ring 6. The convex root will extend to the inside of the pipe interface A end 1 to form a groove. The outer side of the convex root is provided with The protective layer 3 composed of fire-resistant heat insulation layer and anti-corrosion layer, the protective layer 3 will effectively prevent the high temperature generated during welding from damaging the anti-corrosion layer 5 of the pipeline joint. Corrosion, the inner wall of the pipeline interface A end 1 and the pipeline interface B end 2 is provided with an anti-corrosion layer 5, and the anti-corrosion layer 5 is a coating or a lining.

For the specific construction method, due to the different mesons transported by the pipeline, the anti-corrosion layer used on the inner wall of the pipeline will also be different. According to different transport mesons and anti-corrosion layers, confirm the structure of the protective layer and the number and material of the sealing ring, select and install After the protective layer and the sealing ring are installed, extend the A end of the pipe joint into the B end of the pipe joint, and then weld it by electric welding after it is installed in place.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (4)

1. A welding port of a spiral pipe, comprising a pipeline interface A end, a pipeline interface B end, the pipeline interface A end and the pipeline interface B end are welded, it is characterized in that: the pipeline interface A end is a convex structure, and the convex shape The pipe wall of the convex front end of the structure is provided with a sealing groove and a sealing ring matching the sealing groove. The convex root is provided with an annular groove, and the outer side of the convex root is provided with a protective layer. The B end of the pipe interface is a concave structure. . 2. A welding joint of a spiral pipe according to claim 1, characterized in that: the protective layer is composed of a fire-resistant and heat-insulating layer and an anti-corrosion layer. 3 . The welding joint of a spiral pipe according to claim 1 , characterized in that: there are multiple sealing grooves, and the number of sealing rings is any number from one to less than the number of sealing grooves. 4 . 4. A welding joint of a spiral pipe according to claim 1, characterized in that: the inner wall of the pipe joint A end and the pipe joint B end is provided with an anti-corrosion layer, and the anti-corrosion layer is a coating or a lining.