CN114576452A

CN114576452A - Detachable rotary joint

Info

Publication number: CN114576452A
Application number: CN202210286771.6A
Authority: CN
Inventors: 陈伟光; 张斌; 袁玺涛; 宋驰; 荣江山; 陈志涛; 姚轶钦; 张迅; 陆文豪; 宇晓明
Original assignee: Changshu Institute of Technology
Current assignee: Changshu Institute of Technology
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-06-03
Anticipated expiration: 2042-03-23
Also published as: CN114576452B

Abstract

The invention discloses a detachable rotary joint which comprises an upper shell, a lower shell, an inner pipe and a rotary pipe, wherein the upper shell and the lower shell are fixedly and hermetically connected through a flange surface and are enclosed to form a cavity, a first annular groove is formed in the lower shell, a spring and a dynamic friction sealing gasket are arranged in the first annular groove, the head end of the rotary pipe is arranged in the cavity and is rotatably connected with the lower shell, an annular boss matched with the first annular groove is arranged at the head end of the rotary pipe, the dynamic friction sealing gasket is abutted to the bottom surface of the annular boss and the side wall of the first annular groove by the spring, a pipeline interface is arranged on the upper shell, the inner pipe penetrates through the rotary pipe, and the top of the inner pipe is fixedly connected with the pipeline interface. The invention can be conveniently disassembled and removed to replace the dynamic friction sealing gasket, thereby improving the maintenance convenience.

Description

Detachable rotary joint

Technical Field

The invention relates to a rotary joint, in particular to a detachable rotary joint.

Background

The rotary joint is a pipeline connector, and the pipelines connected with two ends of the rotary joint can relatively rotate and can be used for conveying various media such as gas, liquid, oil and the like. The compact design structure adopts flange formula connection, and effectual integration is in the customer equipment. However, the existing rotary joint structure in the market is complex, high in processing cost and inconvenient to disassemble, and when the gasket at the joint is worn, the gasket is inconvenient to replace or medium leakage occurs, so that the maintenance is difficult.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides a detachable rotary joint, which solves the problem that the conventional rotary joint is difficult to detach and maintain.

The technical scheme of the invention is as follows: the utility model provides a can dismantle rotary joint, includes upper housing, lower casing, inner tube and rotatory pipe, upper housing with the casing passes through flange face fixed sealing connection and encloses and closes the vacuole formation down, the internal first ring channel that is equipped with of inferior valve, be equipped with spring and dynamic friction seal gasket in the first ring channel, the head end of rotatory pipe set up in the cavity, rotatory pipe with the casing rotates to be connected down, the head end of rotatory pipe be equipped with first ring channel complex annular boss, the spring will dynamic friction seal gasket butt in the bottom surface of annular boss and the lateral wall of first ring channel, upper housing is equipped with the pipeline interface, the inner tube is worn to establish in the rotatory pipe, the top of inner tube with pipeline interface fixed connection.

Further, the outer side wall of the first annular groove is higher than the inner side wall of the first annular groove.

Furthermore, in order to reduce friction between the upper shell and the rotating inner tube, an annular middle wall is arranged in the upper shell, and the lower end face of the annular middle wall is abutted to the end face of the head end of the rotating tube through a first ball.

Further, the terminal surface of the head end of rotatory pipe is equipped with the second ring channel, the wall stretches into in the annular the second ring channel, the lower terminal surface of wall in the annular through first ball with the tank bottom surface butt of second ring channel.

Further, in order to improve the sealing performance, an O-shaped sealing ring is arranged between the rotating pipe and the inner pipe.

Furthermore, in order to facilitate the replacement of the O-shaped sealing ring, the lower end of the rotating pipe is in threaded connection with an extension pipe section, the extension pipe section has the same inner diameter as the rotating pipe, a sealing groove is formed in the joint of the inner wall of the extension pipe section and the inner wall of the rotating pipe, and the O-shaped sealing ring is arranged in the sealing groove.

Further, a bearing sleeve is fixedly arranged in the lower shell, the head end of the rotating pipe is arranged in the bearing sleeve, and a second ball is arranged between the outer peripheral surface of the head end of the rotating pipe and the bearing sleeve.

Compared with the prior art, the invention has the advantages that:

the spring and the dynamic friction sealing gasket are arranged on one side and are arranged in the first annular groove, the dynamic friction sealing gasket is required to be disassembled and replaced, and the spring can eject the dynamic friction sealing gasket out of the first annular groove after the rotating pipe is taken out, so that the replacement and maintenance are convenient. The height of the side wall of the first annular groove is set, so that the dynamic friction sealing gasket cannot be completely separated from the constraint when being ejected out of the first annular groove, and the dynamic friction sealing gasket can be accurately positioned during installation, and the situation that the dynamic friction sealing gasket cannot enter the first annular groove due to position deviation when the rotary pipe is pressed down is avoided.

Drawings

Fig. 1 is a schematic perspective view of a detachable rotary joint according to an embodiment.

Fig. 2 is a sectional view of the detachable rotary joint according to the embodiment.

Fig. 3 is a schematic sectional view of an upper housing and a lower housing of the detachable rotary joint of the embodiment.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.

In an embodiment, please refer to fig. 1 to 3, a detachable rotary joint according to the present embodiment includes an upper housing 1, a lower housing 2, an inner pipe 3, a rotary pipe 4, and an extension pipe section 5, wherein both the upper housing 1 and the lower housing 2 are provided with flange surfaces 6, a sealing gasket is disposed between the flange surfaces 6, and then the flange surfaces 6 are abutted by bolts to fix the upper housing 1 and the lower housing 2. A cylindrical cavity is enclosed between the upper shell 1 and the lower shell 2. A pipeline connector 7 is arranged on the upper shell 1, the inner wall of the pipeline connector 7 is provided with threads for connecting with an external pipeline, and the top end of the inner pipe 3 is also connected with the pipeline connector 7 through the threads.

The inner cavity of the lower case 2 includes a cylindrical cavity, a through hole 8 is provided at the center of the lower case 2, a first annular groove 9 is provided on the bottom surface of the cylindrical cavity around the through hole 8, and a height within the first annular groove 9 is removed from the bottom surface 10 of the cylindrical cavity to be lower than the height of the original bottom surface 10 of the cylindrical cavity, thereby forming a stepped cavity having different depths within the lower case 2. A bearing sleeve 11 is arranged in the inner cavity of the lower shell 2, the head end of the rotating pipe 4 is arranged in the bearing sleeve 11, and the lower end of the rotating pipe 4 penetrates out of the through hole 8 of the lower shell 2. A gap is formed between the outer peripheral surface of the tip end of the rotary tube 4 and the inner wall of the bearing sleeve 11, and the second balls 12 are placed in the gap so that the rotary tube 4 can rotate, and the distance between the balls is ensured to be equal by providing a bearing ball retainer between the second balls 12. In order to fix the bearing sleeve 11, a spline groove 13 may be formed in the inner cavity wall of the lower housing 2, spline teeth 15 that are engaged with the spline groove 13 are provided on the outer periphery of a baffle 14 that axially blocks the bearing sleeve 11, and the baffle 14 is fixed in the inner cavity of the lower housing 2. The head end of the rotary pipe 4 is further provided with an annular boss 16 which is matched with the first annular groove 9, and when the rotary pipe 4 is assembled with the bearing sleeve 11, the annular boss 16 is inserted into the first annular groove 9. A spring 17 is arranged in the first annular groove 9, a dynamic friction sealing gasket 18 is arranged on the spring 17, and when the annular boss 16 is inserted into the first annular groove 9, the spring 17 tightly abuts the dynamic friction sealing gasket 18 against the lower end face of the annular boss 16. In this embodiment the dynamic friction seal gasket 18 is provided with a flat-bottomed V-shaped groove which also comes into contact with the side wall of the first annular groove 9 to complete the seal when it is pressed against the lower end face of the annular boss 16 by the spring 17. It should be noted that the top surface of the dynamic friction seal 18 can also be provided with a cambered or a concave section, so as to form a better contact with the inner or outer side wall of the first annular groove 9 to complete the seal. The axial positioning of the rotary tube 4 is also dependent on the upper housing 1, i.e. the upper housing 1, when fixed to the lower housing 2, will position the head end face of the rotary tube 4 in abutment, thus ensuring that the spring 17 remains always under pressure. In this embodiment, an annular middle wall 19 is disposed in the upper housing 1, a second annular groove 20 is disposed on an end surface of a head end of the rotating tube 4, a plurality of ball grooves are disposed on a lower end surface of the annular middle wall 19, first balls 21 are disposed in the ball grooves, when the upper housing 1 and the lower housing 2 are mounted in a butt joint manner, the annular middle wall 19 extends into the second annular groove 20, the first balls 21 contact with a groove bottom of the second annular groove 20, and the inner tube 3 extends into the rotating tube 4 and extends out from a lower end of the rotating tube 4. In order to further improve the sealing performance, the lower end of the rotary pipe 4 is threaded to form a threaded connection with an extension pipe section 5, and the extension pipe section 5 is used for connecting with an external pipeline. The connected extension pipe section 5 and the rotary pipe 4 have the same inner diameter, the butt joint parts of the inner wall of the extension pipe section 5 and the inner wall of the rotary pipe 4 are respectively provided with a quarter-circle groove, a semicircular sealing groove 22 is formed after butt joint, a semicircular sealing groove 22 is also arranged at the corresponding position of the outer wall of the inner pipe 3, and an O-shaped sealing ring 23 is arranged at the sealing groove 22 and is positioned between the rotary pipe 4 and the inner pipe 3 to form another sealing point, so that outward leakage is avoided.

When the detachable rotary joint of the embodiment is detached for maintenance, the extension pipe section 5 is screwed down, the O-shaped sealing ring 23 is removed, the connecting bolts of the upper shell 1 and the lower shell 2 are detached, the rotary pipe 4 and the bearing sleeve 11 are taken out from the lower shell 2 after the blocking piece 14 is detached, the dynamic friction sealing gasket 18 is ejected out from the first annular groove 9 under the action of the spring 17, because the outer wall of the first annular groove 9 is higher and the inner wall is lower, the dynamic friction sealing gasket 18 is not easy to fly out under the constraint of the outer wall after being ejected out, and the dynamic friction sealing gasket 18 is easy to keep coaxial with the first annular groove 9 without deviation when being replaced with a new dynamic friction sealing gasket 18, and when the upper shell 1 and the lower shell 2 are in butt joint installation, the dynamic friction sealing gasket 18 is easier to be pressed into the first annular groove 9, so that the smooth installation is ensured.

Claims

1. The utility model provides a can dismantle rotary joint, its characterized in that, includes casing, lower casing, inner tube and rotatory pipe, go up the casing with the casing passes through flange face fixed sealing connection and encloses and closes the vacuole formation down, the internal first ring channel that is equipped with of inferior valve, be equipped with spring and dynamic friction seal gasket in the first ring channel, the head end of rotatory pipe set up in the cavity, rotatory pipe with casing rotation down is connected, the head end of rotatory pipe be equipped with first ring channel complex annular boss, the spring will dynamic friction seal gasket butt in the bottom surface of annular boss and the lateral wall of first ring channel, it is equipped with the pipeline interface to go up the casing, the inner tube wears to establish in the rotatory pipe, the top of inner tube with pipeline interface fixed connection.

2. The removable swivel joint of claim 1, wherein an outer sidewall of the first annular groove is higher than an inner sidewall of the first annular groove.

3. The detachable rotary joint according to claim 1, wherein an annular middle wall is provided in the upper housing, and a lower end surface of the annular middle wall abuts against a head end surface of the rotary pipe via a first ball.

4. The detachable rotary joint according to claim 3, wherein a second annular groove is provided in an end surface of the head end of the rotary pipe, the annular middle wall extends into the second annular groove, and a lower end surface of the annular middle wall abuts against a groove bottom surface of the second annular groove via a first ball.

5. The removable swivel joint of claim 1, wherein an O-ring seal is provided between the swivel tube and the inner tube.

6. The detachable rotary joint according to claim 5, wherein the lower end of the rotary pipe is threadedly connected to an extension pipe section, the extension pipe section has the same inner diameter as the rotary pipe, a sealing groove is formed at a joint of an inner wall of the extension pipe section and the inner wall of the rotary pipe, and the O-ring is disposed in the sealing groove.

7. The detachable rotary joint according to claim 1, wherein a bearing sleeve is fixedly disposed in the lower housing, a head end of the rotary pipe is disposed in the bearing sleeve, and a second ball is disposed between an outer peripheral surface of the head end of the rotary pipe and the bearing sleeve.