Steel pipe mounting and welding structure

Abstract

The utility model discloses a steel pipe installation welding structure which comprises a pipeline A and a pipeline B, the pipeline B is propped against the pipeline A; the inner welding layer is connected with the pipeline B and the pipeline A, and the outer welding layer is arranged outside the inner welding layer. The pipeline B and the pipeline A are fixed through the inner welding layer and the outer welding layer, and the wave fluctuation position of the outer welding layer corresponds to the wave fluctuation position of the inner welding layer in a staggered mode, so that the inner face of the outer welding layer is in a wave shape and is welded to the outer wave-shaped position of the inner welding layer in a wave-shaped contact mode, and the welding reliability of the welding layers is improved; the problem that the welding reliability of the welding layers is poor due to plane contact welding between the welding layers is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of steel pipe installation welding structure, belong to steel pipe welding structure technical field. BACKGROUND

[0002] When laying pipeline for water supply or gas supply, single section pipeline needs to be lengthened by welding butt joint. Therefore, the quality of welding structure between steel pipes determines the service life in later period.

[0003] The existing steel pipe installation welding structure technology is disclosed in Chinese patent No. CN106270933A. Although the end of the pipeline is welded by multiple layers of welding layers, the welding layers are in plane contact and fusion, resulting in poor fusion reliability between the welding layers. INVENTION CONTENTS

[0004] To solve the above technical problems, the utility model provides a kind of steel pipe installation welding structure.

[0005] The utility model is realized by the following technical solutions.

[0006] The utility model provides a kind of steel pipe installation welding structure, comprising:

[0007] Pipeline A;

[0008] Pipeline B, pipeline B is in contact with pipeline A;

[0009] Inner layer welding layer connecting pipeline B and pipeline A, outer layer welding layer is outside inner layer welding layer.

[0010] The pipeline A has a welding bevel A, the pipeline B has a welding bevel B, the welding bevel A of pipeline A is in contact with the welding bevel B of pipeline B, and a triangular-shaped recessed welding space is presented.

[0011] The inner layer welding layer and the outer layer welding layer are located in the recessed welding space between the pipeline B and the pipeline A.

[0012] The outer part of the inner layer welding layer is wavy; the outer part of the outer layer welding layer is wavy, and the inner surface of the outer layer welding layer is in contact and fusion with the wavy outer part of the inner layer welding layer; the wavy part of the outer layer welding layer is in staggered correspondence with the wavy part of the inner layer welding layer.

[0013] The inner layer welding layer can be one layer or multiple layers, and the wavy parts of the inner layer welding layer are in staggered correspondence.

[0014] The pipeline A and the pipeline B are both provided with a welding containing groove, and the welding containing groove is distributed in a ring shape outside the pipeline A and the pipeline B; the outer layer welding layer has an inner folding part at both ends, and the inner folding part is located in the welding containing groove.

[0015] The utility model discloses beneficial effect lies in: pipeline B passes through inner layer welding layer, outer layer welding layer fixed with pipeline A, and the wave fluctuation of outer layer welding layer is in error with the wave fluctuation of inner layer welding layer, and the inner surface of outer layer welding layer also presents the wave shape and is contacted and fused to the wave shape place outside inner layer welding layer with the wave shape, improves the reliability of welding layer each other fusion, solves the plane contact fusion between welding layer, leads to the problem of poor reliability of welding layer each other fusion. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the welding section view schematic diagram of the utility model discloses, and

[0017] Fig. in: 1-pipeline A;2-pipeline B;3-inner layer welding layer;4-outer layer welding layer;5-welding groove;41-inner fold. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model is further described below, but the scope of protection is not limited to the description.

[0019] As Figure 1 Indicated.

[0020] One kind of steel pipe installation welding structure of the application, comprising:

[0021] There is welding bevel A of pipeline A1 and there is welding bevel B of pipeline B2, and the welding bevel A of pipeline A1 is in contact with the welding bevel B of pipeline B2, and presents the recessed space of triangular shape to be welded.

[0022] The recessed space to be welded between pipeline B2 and pipeline A1 has inner layer welding layer 3, and the outside of inner layer welding layer 3 is wave-shaped, and outer layer welding layer 4 is outside inner layer welding layer 3, and the outside of outer layer welding layer 4 is wave-shaped, and the wave fluctuation of outer layer welding layer 4 is in error with the wave fluctuation of inner layer welding layer 3. The inner layer welding layer 3 can be one layer or multiple layers, and the wave fluctuation of inner layer welding layer 3 is in error.

[0023] Pipeline B2 and pipeline A1 are welded and fixed through inner layer welding layer 3 and outer layer welding layer 4, and the wave fluctuation of outer layer welding layer 4 is in error with the wave fluctuation of inner layer welding layer 3, so that the inner surface of outer layer welding layer 4 also presents the wave shape and is contacted and fused to the wave shape place outside inner layer welding layer 3 with the wave shape, improves the reliability of welding layer each other fusion, solves the plane contact fusion between welding layer, leads to the problem of poor reliability of welding layer each other fusion.

[0024] Pipeline A1 and pipeline B2 are all provided with welding groove 5, and welding groove 5 is annularly distributed outside pipeline A1 and pipeline B2;Outer layer welding layer 4 has inner fold 41 at both ends, and inner fold 41 is in welding groove 5, to avoid that outer layer welding layer 4 is prone to warping at both ends later.

Claims

1. A steel pipe installation welded structure, characterized by, Pipe A (1); Pipe B (2), which is in contact with pipe A (1); Inner welding layer (3) connecting pipe B (2) and pipe A (1), which has outer outer welding layer (4); The outer part of the inner welding layer (3) is wavy; the outer part of the outer welding layer (4) is wavy, and the inner surface of the outer welding layer (4) is contacted and welded to the outer wavy part of the inner welding layer (3) in a wavy shape; the wave of the outer welding layer (4) is staggered with the wave of the inner welding layer (3).

2. The steel pipe installation welded structure according to claim 1, characterized by: The pipe A (1) has a welding bevel A, and the pipe B (2) has a welding bevel B, and the welding bevel A of the pipe A (1) is in contact with the welding bevel B of the pipe B (2), which presents a triangular-shaped concave welding space.

3. The steel pipe installation welded structure according to claim 1, wherein: The inner welding layer (3) and the outer welding layer (4) are located in the concave welding space between the pipe B (2) and the pipe A (1).

4. The steel pipe installation welded structure according to claim 1, wherein: The inner welding layer (3) can be one or more layers, and the wave of the inner welding layer (3) is staggered.

5. The steel pipe installation welded structure according to claim 3, wherein: The pipe A (1) and the pipe B (2) are provided with a welding groove (5), and the welding groove (5) is distributed in a ring shape outside the pipe A (1) and the pipe B (2); the outer welding layer (4) has an inner folding part (41) at both ends, and the inner folding part (41) is located in the welding groove (5).

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