Lining type structure joint device

Abstract

The utility model discloses a joint device with a lining type structure, which comprises a welding pipe and is characterized in that one end of the welding pipe is fixedly connected with a pipe connecting nut, the inside of the pipe connecting nut is in threaded connection with a joint, two ends of the joint are respectively provided with a groove, an O-shaped ring is arranged inside one of the grooves and is sealed in an axial mode, and the other end of the groove is in threaded connection with the joint. And the pipeline pressure is locked in the axial pipeline, so that internal pressure cannot be brought to the end face of the joint connecting part to cause deformation and damage of the connecting pipe due to compression.

Description

Technical Field

[0001] This utility model relates to the field of joint technology, specifically to a liner-type joint device. Background Technology

[0002] Commonly used national standard fittings are only suitable for pressures below 30.0MPa, but many valves now have pressure ratings that exceed this level. Therefore, fittings with special structures and specifications are required to meet the needs of the equipment.

[0003] Conventional joints use a soft seal on the end face, which can easily cause the pipe to deform under pressure. This utility model uses an axial seal for the inner liner joint, which locks the pipeline pressure inside the axial pipe and prevents internal pressure from causing the pipe to deform or be damaged at the end face of the joint connection. Utility Model Content

[0004] The purpose of this utility model is to provide an inner-lined structural joint device to solve the problem that conventional joints, which use end-face soft sealing, are prone to deformation under pressure.

[0005] To achieve the above objectives, an internally lined structural joint device is provided, comprising: a welded pipe, characterized in that a connecting nut is fixedly connected to one end of the welded pipe, a joint is threadedly connected inside the connecting nut, and grooves are provided at both ends of the joint, one of which contains an O-ring for axial sealing, thereby locking the pipeline pressure within the axial pipe and preventing internal pressure from causing deformation and damage to the connecting pipe at the joint connection end face.

[0006] According to the aforementioned inner-lined joint device, one end of the O-ring is movably connected to the inside of the joint groove, and the outer surface of the O-ring is movably connected to the inner surface of the connector nut, which facilitates the installation and removal of the O-ring, and the O-ring is fixed by compression using the connector nut.

[0007] According to the aforementioned inner-lined structural joint device, the two grooves are symmetrically arranged and interconnected to facilitate flow.

[0008] According to the aforementioned liner-type joint device, the inner diameter of the connecting pipe nut matches the outer diameter of one end of the joint, which helps to ensure the sealing of the connection.

[0009] Compared with the prior art, the beneficial effects of this utility model are: through the cooperation of the connector, O-ring, pipe nut and welded pipe, the inner-lined connector adopts axial sealing, locking the pipeline pressure in the axial pipe, and will not bring internal pressure to the end face of the connector connection, causing the pipe to be deformed and damaged by pressure.

[0010] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0012] Figure 1 This is an internal structural diagram of an inner-lined joint device according to the present invention;

[0013] Figure 2 This is a cross-sectional view of the connector of the inner lining structure connector device of this utility model.

[0014] Figure 3 This is a cross-sectional view of an O-ring of an inner-lined structural joint device according to this utility model.

[0015] In the diagram: 1. Connector; 2. O-ring; 3. Connecting nut; 4. Welded pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: an inner-lined structural joint device, including: a welded pipe 4, one end of which is fixedly connected to a connecting pipe nut 3, the connecting pipe nut 3 is used to connect to a joint 1, the connecting pipe nut 3 is internally threaded to the joint 1, both ends of the joint 1 are provided with grooves to facilitate sealing with O-rings 2, and one of the grooves is provided with an O-ring 2.

[0018] One end of the O-ring 2 is movably connected to the inside of the groove of the connector 1, and the outer surface of the O-ring 2 is movably connected to the inner surface of the connector nut 3. The two grooves are symmetrically arranged and connected to each other. The inner diameter of the connector nut 3 matches the outer diameter of one end of the connector 1.

[0019] Working principle: Weld the welded pipe 4 to the side of the connecting nut 3, install the O-ring 2 in the groove of the connector 1, and then thread the connecting nut 3 to the outside of the connector 1. This locks the pipeline pressure inside the axial pipe, preventing internal pressure from being applied to the end face of the connector 1 and causing the connecting pipe to be deformed or damaged by pressure.

[0020] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A liner-type structural joint device, comprising: The welded pipe (4) is characterized in that a connecting nut (3) is fixedly connected to one end of the welded pipe (4), and a connector (1) is threaded inside the connecting nut (3). Both ends of the connector (1) are provided with grooves, and an O-ring (2) is provided inside one of the grooves.

2. The inner-lined structural joint device as described in claim 1, characterized in that: One end of the O-ring (2) is movably connected to the inside of the groove of the connector (1), and the outer surface of the O-ring (2) is movably connected to the inner surface of the connector nut (3).

3. The inner-lined structural joint device as described in claim 1, characterized in that: The two grooves are symmetrically arranged and are interconnected.

4. The inner-lined structural joint device as described in claim 1, characterized in that: The inner diameter of the connecting nut (3) matches the outer diameter of one end of the connector (1).

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