CN212273321U

CN212273321U - Axial leakage-proof double-sealing pipe fitting

Info

Publication number: CN212273321U
Application number: CN202020884406.1U
Authority: CN
Inventors: 陈光卫; 张双全; 徐旭; 李振; 王贝贝
Original assignee: Kangtai Plastic Science and Technology Group Co Ltd
Current assignee: Kangtai Plastic Technology Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-01-01
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses an axial leakage-proof double-sealing pipe fitting, which comprises an inner wire pipe with at least two groups of end heads and at least two groups of outer wire bodies, wherein the outer wall of the first end of each group of outer wire bodies is respectively in threaded connection with the inner wall of one group of end heads, and the second end of each group of outer wire bodies is welded with a pipeline; a sealing ring is embedded on the outer circumference of each group of the outer filament bodies to form a sealing structure with the inner wall of the end head; the utility model provides an inside and with end inner wall threaded connection of end of interior silk pipe of first end of the outer silk body, the first seal structure of pipe fitting axis is realized to the threaded connection relation, and the sealing washer that the outer silk body surface was inlayed and is established simultaneously only laminates in the end inner wall, realizes that the second of pipe fitting axis says seal structure, and simple to operate and sealed respond well, has effectively solved traditional helicitic texture in case the problem that easily causes the leakage after the locking force descends, and pipe-line system is more stable.

Description

Axial leakage-proof double-sealing pipe fitting

Technical Field

The utility model relates to a sealed pipe fitting field especially relates to an axial leak protection formula double containment pipe fitting.

Background

The existing stainless steel pipeline and pipe fittings are generally directly connected by threads, the reliability of the traditional thread structure is relatively weak when the traditional thread structure is connected, the locking force of the threads is reduced after stress release after long-term use, the threads are easy to loosen when the threads are vibrated in the use process, the pressing force of the threads on the sealing piece is weakened, and leakage occurs when a medium is conveyed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's shortcoming, provide a can realize the double-deck sealed pipe fitting of axial leak protection.

The purpose of the utility model is realized through the following technical scheme:

an axial leak-proof double seal pipe member comprising: the outer wall of the first end of each group of the outer screw bodies is respectively in threaded connection with the inner wall of one group of the end heads, and the second end of each group of the outer screw bodies is welded with a pipeline; and a sealing ring is also embedded on the outer circumference of each group of the outer filament bodies so as to form a sealing structure with the inner wall of the end head.

In some preferred embodiments, the inner wire tube is in a two-way, three-way or four-way tube configuration.

In some preferred embodiments, an outer thread surface is arranged on the outer circumferential surface of the first end of the outer thread body, an inner thread surface is arranged on the inner wall of each end head so as to be in threaded connection with the outer thread body, and the sealing ring is embedded on the outer circumferential surface between the second end of the outer thread body and the outer thread surface.

In some preferred embodiments, the inner walls of the at least two sets of the terminal heads are provided with annular first protrusions, the outer wall of the second end of each set of the outer filament body is provided with annular second protrusions, and the second protrusions abut against the end portions of the terminal heads, so that the depth of the outer filament body extending into the inner filament tube is between the end portions of the terminal heads and the first protrusions.

In some preferred embodiments, the outer filament has an outer circumferential profile that decreases in size from the second end to the first end thereof.

In some preferred embodiments, the end openings of the at least two sets of stubs are each flared.

The utility model has the advantages of it is following: the axial leakage-proof double-sealing pipe fitting is used for connecting two or more groups of pipelines, and each group of pipelines is welded with the outer screw body; the end that the external screw body other end extended to the internal thread pipe is inside and with end inner wall threaded connection, the first seal structure of pipe fitting axis is realized to the threaded connection relation, and the sealing washer that external screw body surface inlay was established simultaneously only laminates in the end inner wall, realizes the second seal structure of pipe fitting axis, and simple to operate and sealed respond well, have effectively solved traditional helicitic texture in case the locking force easily causes the problem of leaking after descending, and pipe-line system is more stable.

Drawings

FIG. 1 is a schematic structural view of the axial leakproof double-sealing pipe fitting of the present invention;

in the figure: 1-internal thread pipe, 100-first bulge, 110-internal thread surface, 120-end, 2-external thread body, 200-channel, 210-external thread surface, 220-second bulge, 3-sealing ring and 4-pipeline.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

An axial leakproof double sealing pipe fitting for the leaktight connection of a plurality of pipes 4, comprising an internal threaded pipe 1 with at least two sets of heads 120 and at least two sets of external threads 2, namely: according to the actual use requirement, the inner wire pipe 1 can be made into a two-way pipe, a three-way pipe, a four-way pipe structure, an elbow or a reducer structure.

The outer wall of the first end of each set of the outer screw body 2 is respectively connected with the inner wall of the set of the end head 120 in a threaded manner, and it is easy to think that, in this embodiment, the outer circumferential surface of the first end of the outer screw body 2 is provided with an outer thread surface 210, the inner wall of each set of the end head 120 is provided with an inner thread surface 110 to be connected with the set of the outer screw body 2 in a threaded manner, and the sealing ring 3 is embedded on the outer circumferential surface between the second end of the outer screw body 2 and the outer thread surface 210.

The pipeline 4 is welded at the second end of each group of the external screw bodies 2, the end part of the pipeline 4 is connected with the second end of each external screw body 2, the first end of each external screw body 2 extends into the internal screw pipe 1, the internal thread surface 110 and the external thread surface 210 form a first sealing structure axially arranged along the pipeline 4, and meanwhile, the sealing ring 3 is tightly attached to the inner wall of the internal screw pipe 1 to form a second end sealing structure.

The inner walls of the at least two groups of end heads 120 are provided with annular first protruding parts 100, the internal thread pipe 1 in the embodiment is a two-way pipe, so that the two groups of end heads 120 are provided, and the two groups of first protruding parts 100 in the two groups of end heads 120 are integrally formed; the outer wall of the second end of each group of the outer screw bodies 2 is provided with an annular second bulge part 220, and after the pipe fitting is installed, the second bulge parts 220 abut against the end part of the end head 120, so that the depth of the outer screw bodies 2 extending into the inner screw pipe 1 is between the end part of the end head 120 and the first bulge part 100, and the outer screw bodies 2 are convenient to install and position; meanwhile, the size of the outline of the outer circumference of the outer screw body 2 is gradually reduced from the second end to the first end, in this embodiment, the outer circumference of the outer screw body 2 is step-shaped, the second boss 220 is a first step surface, the external thread surface 210 is a third step surface, a second step surface is further arranged between the first step surface and the third step surface, the sealing ring 3 is embedded on the second step surface, and the diameters of the outer contours of the first step surface, the second step surface and the third step surface are sequentially reduced, so that the end thread surface is not damaged when the first end of the outer screw body 2 extends into the end socket 120; in addition, the end openings of the at least two groups of end heads 120 are trumpet-shaped, the sealing ring 3 is gradually compressed to be tightly attached to the inner wall of the end head 120 in the process that the sealing ring 3 goes into the end head 120 along with the outer screw body 2, and the opening of the end head 120 cannot damage the sealing ring 3.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an axial leak protection formula double containment pipe fitting which characterized in that includes:

an internal thread tube (1) having at least two sets of tips (120);

the outer wall of the first end of each group of the outer screw bodies (2) is in threaded connection with the inner wall of one group of the end heads (120), and the second end of each group of the outer screw bodies (2) is welded with a pipeline (4); and a sealing ring (3) is also embedded on the outer circumferential surface of each group of the outer filament bodies (2) to form a sealing structure with the inner wall of the end head (120).

2. The axial leak-proof double seal pipe member as claimed in claim 1, wherein: the inner wire pipe (1) is of a two-way pipe, a three-way pipe or a four-way pipe structure.

3. The axial leak-proof double seal pipe member as claimed in claim 1, wherein: be equipped with external screw thread face (210) on the outer periphery of the first end of outer screw body (2), every group end (120) inner wall is equipped with internal screw thread face (110) in order to with outer screw body (2) threaded connection, sealing washer (3) inlay establish on the outer periphery between second end and the external screw thread face (210) of outer screw body (2).

4. The axial leak-proof double seal pipe member as claimed in claim 1, 2 or 3, wherein: the inner walls of the at least two groups of end heads (120) are provided with annular first protruding parts (100), the outer wall of the second end of each group of the outer filament bodies (2) is provided with annular second protruding parts (220), and the second protruding parts (220) are abutted to the end parts of the end heads (120), so that the depth of the outer filament bodies (2) extending into the inner filament tube (1) is between the end parts of the end heads (120) and the first protruding parts (100).

5. The axial leak-proof double seal pipe member as claimed in claim 1, 2 or 3, wherein: the outer circumference of the outer filament (2) is of a profile which decreases gradually from its second end to its first end.

6. The axial leak-proof double seal pipe member as claimed in claim 1, 2 or 3, wherein: the openings at the end parts of the at least two groups of end heads (120) are trumpet-shaped.