Sleeve welding union

Abstract

The utility model relates to a socket welding union which comprises a nut, a cloud head and a pipe joint, and the cloud head and the pipe joint are connected with each other to form an integral structure. The cloud head is provided with a first inner hole, and one end of the first inner hole is provided with a conical chamfer surface; the pipe joint is provided with a second inner hole, and the diameter of the second inner hole is larger than that of the first inner hole, so that a step surface is formed between the first inner hole and the second inner hole; an internal thread is arranged on the inner surface of the nut, and an external thread matched with the internal thread is arranged on the outer surface of the cloud head. A sealing groove is formed in the inner surface of the nut; a sealing gasket is arranged in the sealing groove; the outer surface of the cloud head and the inner surface of the nut are conical surfaces. The nut and the cloud head are provided with the conical surfaces which are matched with each other, and the sealing gasket is arranged in the sealing groove of the nut, so that a double-sealing effect is achieved, and the reliability is higher. The anti-leakage pipeline is formed by forging and pressing and is processed into an integral structure, has the characteristics of compact structure, high strength and good anti-leakage effect, and is particularly suitable for pipelines for conveying high-temperature and high-pressure media.

Description

Technical Field

[0001] The utility model relates to the technical field of pipelines, in particular to a sleeve welding pipe. Background Art

[0002] Union, also known as live joint, is a common pipe connector that is easy to install or disassemble. It mainly consists of three parts: nut, socket and flat joint. Union connection forms are divided into socket welding and threaded connection. Socket welding is to insert the steel pipe into the socket hole for welding, which is called "sleeve welding union" or "socket live joint". Threaded connection is to screw the steel pipe into the screw hole for connection, which is called "threaded union" or "threaded live joint".

[0003] At present, the socket joint generally consists of a spigot, a socket, a socket slot, etc. The spigot has a socket slot, and the spigot and the socket are located at both ends of the joint. The socket joint can be widely used in pipes of different diameters, and can also be used in water meters and valves. Pipes with a spigot structure can reduce costs and are more convenient to install and maintain. However, for pipelines that transport high-temperature and high-pressure media, its anti-leakage effect is not ideal. Utility Model Content

[0004] The utility model aims to provide a sleeve welding pipe which is suitable for conveying high-temperature and high-pressure media and has a good anti-leakage effect.

[0005] The purpose of this utility model is achieved by adopting the following technical solutions:

[0006] A sleeve welding joint comprises a nut, a socket head and a pipe joint, wherein the socket head and the pipe joint are connected to each other to form an integral structure;

[0007] The cloud head is provided with a first inner hole, and one end of the first inner hole is provided with a conical chamfered surface;

[0008] The pipe joint is provided with a second inner hole, the diameter of the second inner hole is larger than the diameter of the first inner hole, so that a step surface is formed between the first inner hole and the second inner hole;

[0009] The inner surface of the nut is provided with an internal thread, and the outer surface of the cloud head is provided with an external thread matching the internal thread.

[0010] As a preferred technical solution of the utility model, a sealing groove is provided on the inner surface of the nut, and the sealing groove is provided between the internal thread and the end of the nut.

[0011] As a preferred technical solution of the utility model, a sealing gasket is provided in the sealing groove.

[0012] As a preferred technical solution of the utility model, the inner surface of the nut provided with threads is a conical surface.

[0013] As a preferred technical solution of the utility model, the outer surface of the cloud head provided with threads is set as a conical surface.

[0014] As a preferred technical solution of the present utility model, the outer surface of the nut is set to be a regular hexagon.

[0015] As a preferred technical solution of the present utility model, the end of the pipe joint is provided with a 45-degree chamfer.

[0016] Beneficial effects of the utility model: Compared with the prior art, the nut and the cloud head of the utility model are provided with conical surfaces matching each other, and a sealing gasket is also provided in the sealing groove of the nut, thereby forming a double sealing effect and having higher reliability.

[0017] The utility model is formed by forging and processed into an integral structure, has the characteristics of compact structure, high strength and good anti-leakage effect, and is particularly suitable for pipelines conveying high-temperature and high-pressure media. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the nut of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of a top view structure;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the cloud head of the utility model;

[0021] Figure 4 yes Figure 3 Schematic diagram of the top view structure.

[0022] In the figure: 1, nut, 2, cloud head, 3, pipe joint, 4, first inner hole, 5, second inner hole, 6, step surface, 7, sealing groove. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0024] like Figures 1 to 4 As shown, a socket welding device comprises a nut 1, a cloud head 2 and a pipe joint 3, wherein the cloud head 2 and the pipe joint 3 are interconnected to form an integral structure; the cloud head 2 is provided with a first inner hole 4, and one end of the first inner hole 4 is provided with a conical chamfered surface; the pipe joint 3 is provided with a second inner hole 5, and the diameter of the second inner hole 5 is greater than the diameter of the first inner hole 4, so that a step surface 6 is formed between the first inner hole 4 and the second inner hole 5; the inner surface of the nut 1 is provided with an internal thread, and the outer surface of the cloud head 2 is provided with an external thread matching the internal thread.

[0025] In this embodiment, the inner surface of the nut 1 is provided with a sealing groove 7, which is provided between the internal thread and the end of the nut; when installing the pipeline, a sealing gasket is provided in the sealing groove 7. The inner surface of the nut 1 provided with threads is a conical surface; the outer surface of the cloud head 2 provided with threads is a conical surface; the outer surface of the nut 1 is a regular hexagon; and the end of the pipe joint 3 is provided with a 45-degree chamfer.

[0026] The above embodiments are limited to illustrating the concept and technical features of the utility model, and their purpose is to allow those skilled in the art to understand the technical solution and implementation method of the utility model, and they cannot limit the protection scope of the utility model. Any equivalent replacement or equivalent change made according to the technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A socket welding joint, comprising a nut, a cloud head and a pipe joint, characterized in that: The cloud head and the pipe joint are connected to each other to form an integral structure; The cloud head is provided with a first inner hole, and one end of the first inner hole is provided with a conical chamfered surface; The pipe joint is provided with a second inner hole, the diameter of the second inner hole is larger than the diameter of the first inner hole, so that a step surface is formed between the first inner hole and the second inner hole; The inner surface of the nut is provided with an internal thread, and the outer surface of the cloud head is provided with an external thread matching the internal thread.

2. The socket welding device according to claim 1, characterized in that: A sealing groove is provided on the inner surface of the nut, and the sealing groove is arranged between the internal thread and the end of the nut.

3. The socket welding device according to claim 2 is characterized in that: A sealing gasket is arranged in the sealing groove.

4. The socket welding device according to claim 1 is characterized in that: The inner surface of the nut provided with threads is a conical surface.

5. The socket welding device according to claim 4 is characterized in that: The outer surface of the cloud head provided with threads is configured as a conical surface.

6. The socket welding device according to claim 1, characterized in that: The outer surface of the nut is set to be a regular hexagon.

7. The socket welding device according to claim 1 is characterized in that: The end of the pipe joint is provided with a 45-degree chamfer.

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