Sealing joint for threaded connection of pipelines

Abstract

The utility model discloses a sealing joint for pipeline threaded connection, which comprises a main joint, a threaded sealing ring and a sealing gasket, the main joint is provided with a main external thread, a sealing ring mounting column and a gasket mounting ring groove, the threaded sealing ring is sleeved on the sealing ring mounting column, one end of the threaded sealing ring is connected with the end face of the main external thread, and the other end of the threaded sealing ring is connected with the gasket mounting ring groove. The thread sealing ring is provided with a second external thread with the same diameter as the main external thread, and the sealing gasket is arranged in the gasket mounting ring groove in a sleeving manner; the main joint is screwed into the internal thread of the mounting pipeline to compress the sealing gasket, so that the outer ring of the sealing gasket is sealed with the inner hole of the mounting pipeline; and the external thread of the pipe fitting to be connected is screwed into the internal thread of the mounting pipeline to compress the thread sealing ring, so that the thread sealing ring and the internal thread of the pipeline are mutually sealed. The sealing joint is convenient, rapid and accurate in overall installation and operation, a traditional thread seal tape is not needed for winding and sealing when internal and external threads of a pipeline are connected, a connected pipe fitting and equipment are easy to install in order, sealing is reliable after installation, and leakage is not prone to occurring.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe fitting connection technical field especially relates to a sealing joint for pipe thread connection. BACKGROUND

[0002] The pipe is usually provided with a connecting thread for connecting with each other or connecting with various joints, valves and other equipment.

[0003] In the prior art, raw material belts are usually wound on the threads for sealing. UTILITY MODEL CONTENTS

[0004] To solve the above problems, the utility model provides a sealing joint for pipe thread connection, which is convenient to install and connect, fast and accurate in installation operation, easy to install the connected pipe fittings and equipment in order, reliable in sealing and difficult to leak after installation.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A sealing joint for pipe thread connection, comprising a main joint, a thread sealing ring and a sealing gasket, the main joint is provided with a main external thread, a sealing ring mounting column and a gasket mounting ring groove, the thread sealing ring is sleeved on the sealing ring mounting column, one end of which is connected with the end face of the main external thread, the thread sealing ring is provided with a second external thread with the same diameter as the main external thread, and the sealing gasket is sleeved in the gasket mounting ring groove; the main joint is screwed into the internal thread of the installation pipe to press the sealing gasket tightly so that the outer ring is sealed with the inner hole of the installation pipe, and the external thread of the connected pipe fitting is screwed into the internal thread of the installation pipe to press the thread sealing ring tightly so that it is sealed with the internal thread of the pipe.

[0007] Further, the main joint is provided with an operating internal hexagonal hole.

[0008] Further, the thread sealing ring and the sealing gasket are made of silica gel or butadiene rubber.

[0009] Further, the main joint is made of metal material.

[0010] Further, at least one complete external thread is arranged in the second external thread.

[0011] Further, at least one complete external thread is arranged in the second external thread.

[0012] The outer diameter of the sealing gasket is greater than the inner hole diameter of the installation pipeline and smaller than the small diameter of the internal thread of the installation pipeline.

[0013] The utility model has the advantages of the following:

[0014] 1. The main joint is suitable for connecting the internal and external threads of the pipeline, and the sealing ring and the sealing gasket with external threads are arranged on the main joint.

[0015] 2. The thread specifications of the main joint and the thread sealing ring are designed and manufactured according to the internal thread of the installation pipeline to be connected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of the sealing joint for the pipeline thread connection.

[0017] Figure 2 It is a front view schematic diagram of the sealing joint for the pipeline thread connection.

[0018] Figure 3 It is a front view schematic diagram of the sealing joint for the pipeline thread connection.

[0019] Figure 4 It is a front view schematic diagram of the sealing joint for the pipeline thread connection.

[0020] Figure 5 It is a front view schematic diagram of the sealing joint for the pipeline thread connection.

[0021] Reference numerals:

[0022] 1, main joint; 11, main external thread; 12, sealing ring mounting column; 13, gasket mounting ring groove; 14, operating internal hexagonal hole; 2, threaded sealing ring; 21, second external thread; 3, sealing gasket; 4, mounting pipe; 5, pipe fitting external thread. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail below in combination with the drawings and specific embodiments:

[0024] Referring to Figures 1-5 The sealing joint for pipe thread connection comprises a main joint 1, a threaded sealing ring 2 and a sealing gasket 3, the main joint 1 is provided with a main external thread 11, a sealing ring mounting column 12 and a gasket mounting ring groove 13, the threaded sealing ring 2 is sleeved on the sealing ring mounting column 12 and is connected with the end face of the main external thread 11, the threaded sealing ring 2 is provided with a second external thread 21 with the same diameter as the main external thread 11, the sealing gasket 3 is sleeved in the gasket mounting ring groove 13, the outer diameter of the sealing gasket 3 is greater than the inner hole diameter of the mounting pipe 4 and is less than the minor diameter of the internal thread of the mounting pipe 4, and a transition step can be arranged at the connecting position of the inner hole and the internal thread of the mounting pipe 4 according to needs; the main joint 1 is screwed into the internal thread of the mounting pipe 4 to compress the sealing gasket 3 so that the outer ring of the sealing gasket 3 is sealed with the inner hole of the mounting pipe 4 (the threaded sealing ring 2 and the sealing gasket 3 are installed into the mounting pipe 4 along with the main joint 1, and the sealing gasket 3 is compressed after the main joint 1 is screwed to the end of the internal thread of the mounting pipe 4 so that the sealing gasket 3 is expanded and tightly connected with the inner hole of the mounting pipe 4 to form a seal), and then the pipe fitting external thread 5 is screwed into the internal thread of the mounting pipe 4 to compress the threaded sealing ring 2 so that the threaded sealing ring 2 is sealed with the internal thread of the mounting pipe 4, and the end face of the pipe fitting external thread 5 is pressed against the threaded sealing ring 2 after being screwed tightly so that the threaded sealing ring 2 is expanded and tightly connected with the internal thread of the mounting pipe 4, and the connecting position of the mounting pipe 4 and the pipe fitting external thread 5 will not leak after being screwed tightly. The main joint 1 is provided with an operating internal hexagonal hole 14 or other wrench operating structure to facilitate the screwing of the main joint 1 into the internal thread of the mounting pipe 4, and the threaded sealing ring 2 mounted on the sealing ring mounting column 12 is convenient to screw into the internal thread of the mounting pipe 4.

[0025] The threaded sealing ring 2 and the sealing gasket 3 are made of silica gel or butadiene-acrylonitrile rubber. The main joint 1 is made of red copper or copper alloy, stainless steel or the like and is not easy to be damaged after long time use.

[0026] The main external thread 11 is provided with at least one complete external thread; the second external thread 21 is provided with at least one complete external thread; it is appropriate to be able to stably screw and the overall length is not too long, generally 2-5 threads are main, and the thread specification is designed and manufactured according to the internal thread of the mounting pipe 4 of different pipe diameters to be connected.

[0027] The above merely describes a specific implementation of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields using the content of the present application specification and drawings are also included in the patent protection scope of the present application.

Claims

1. A sealing joint for pipe threaded connections, characterized in that: The device includes a main connector (1), a threaded sealing ring (2), and a sealing gasket (3). The main connector (1) is provided with a main external thread (11), a sealing ring mounting post (12), and a gasket mounting ring groove (13). The threaded sealing ring (2) is fitted on the sealing ring mounting post (12), and one end of it is connected to the end face of the main external thread (11). The threaded sealing ring (2) is provided with a second external thread (21) with the same diameter as the main external thread (11). The sealing gasket (3) is fitted in the gasket mounting ring groove (13). The main connector (1) is screwed into the internal thread of the installation pipe (4) to press the sealing gasket (3) so that its outer ring seals the inner hole of the installation pipe (4). The external thread (5) of the pipe fitting to be connected is then screwed into the internal thread of the installation pipe (4) to press the threaded sealing ring (2) so that it seals the internal thread of the installation pipe (4).

2. A sealing joint for pipe threaded connections according to claim 1, characterized in that: The main connector (1) is provided with an internal hexagonal hole (14).

3. A sealing joint for pipe threaded connections according to claim 1, characterized in that: The threaded sealing ring (2) and the sealing gasket (3) are made of silicone or nitrile rubber.

4. A sealing joint for pipe threaded connections according to claim 1, characterized in that: The main connector (1) is made of metal material.

5. A sealing joint for pipe threaded connections according to claim 1, characterized in that: The main external thread (11) has at least one complete external thread.

6. A sealing joint for pipe threaded connections according to claim 1, characterized in that: The second external thread (21) has at least one complete external thread.

7. A sealing joint for pipe threaded connections according to claim 1, characterized in that: The outer diameter of the sealing gasket (3) is greater than the inner diameter of the installation pipe (4) and less than the minor diameter of the inner thread of the installation pipe (4).

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