CN211693914U

CN211693914U - Dynamic sealing rotary joint

Info

Publication number: CN211693914U
Application number: CN201922018696.1U
Authority: CN
Inventors: 王斌; 张存礼
Original assignee: Yangzhou Xinxin Metallurgical Equipment Manufacturing Co ltd
Current assignee: Yangzhou Xinxin Metallurgical Equipment Manufacturing Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-10-16
Anticipated expiration: 2029-11-21

Abstract

The utility model belongs to the technical field of rotary joints, in particular to a dynamic sealing rotary joint, which comprises a shell and an inner tube, wherein a stepped hole is arranged in the shell, and the dynamic sealing rotary joint also comprises a blocking cap which is fixed on the end surface of the shell; the inner pipe is provided with a limiting ring positioned in the stepped hole, a spring seat is fixed on the outer side surface of the embedded end of the inner pipe, an O-shaped sealing ring positioned between the plugging cap and the limiting ring is sleeved on the inner pipe, and a telescopic spring positioned between the spring seat and the end wall of the stepped hole is also sleeved on the inner pipe; a second graphite bearing is arranged between the outer wall of the inner pipe and the inner wall of the outer shell; a check ring is arranged on the inner side wall of the stepped hole; the rotary joint of the utility model is convenient to install, stable and reliable in sealing, and the O-shaped sealing ring is extruded and expanded under the elastic action of the expansion spring, so that the sealing effect is improved; the tip of inner tube is for drawing in the form, and the retaining ring in the cooperation shoulder hole avoids debris to pile up the problem of the inside clearance of not being convenient for of shoulder hole.

Description

Dynamic sealing rotary joint

Technical Field

The utility model belongs to the technical field of rotary joint, concretely relates to dynamic seal rotary joint.

Background

The rotary joint is a sealed rotary connector for conveying media in a 360-degree rotating mode, and the rotary joint is of the type: the application fields of hydraulic rotary joints, high-pressure rotary joints, multi-channel rotary joints, high-speed rotary joints, high-temperature rotary joints, single-channel rotary joints, special rotary joints for LEDs (light emitting diodes), special rotary joints for excavators, special rotary joints for machine tools and rotary joints almost cover various processing and manufacturing industries, such as metallurgy, machine tools, power generation, petroleum, rubber, plastics, textile, printing and dyeing, pharmacy, cigarette making, food, feed processing and the like.

In the use process of the original rotary joint, a medium is easy to leak from a gap between the outer shell of the rotary joint and the inner pipe, and the normal use of the rotary joint is influenced.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned problem that exists among the prior art, the utility model provides a dynamic seal rotary joint has that sealing performance is good and simple to operate characteristics.

In order to achieve the above object, the utility model provides a following technical scheme: a dynamic sealing rotary joint comprises an outer shell, an inner tube and a blocking cap, wherein a stepped hole is formed in the outer shell, a through hole is formed in the inner tube, one end of the inner tube is rotatably embedded into the stepped hole, and the blocking cap is fixed on the end face of the outer shell; the inner tube is provided with a limiting ring positioned in the stepped hole, a spring seat is fixed on the outer side surface of the embedded end of the inner tube, an O-shaped sealing ring positioned between the plugging cap and the limiting ring is sleeved on the inner tube, and a telescopic spring positioned between the spring seat and the end wall of the stepped hole is further sleeved on the inner tube; a second graphite bearing is arranged between the outer wall of the inner pipe and the inner wall of the outer shell; and a check ring is arranged on the inner side wall of the stepped hole.

As an optimized technical scheme of the utility model, the stifled cap inner wall with be equipped with first graphite bearing between the inner tube outer wall.

As an optimized technical scheme of the utility model, the vertical tangent plane of stifled cap is "T" style of calligraphy structure, and its one end can imbed in the shoulder hole port.

As an optimized technical scheme of the utility model, the ring thickness of O type sealing washer is equal to inner tube outer wall with the perpendicular distance between the shoulder hole lateral wall.

As an optimized technical scheme of the utility model, the vertical tangent plane of shoulder hole is "T" style of calligraphy structure.

As an optimized technical scheme of the utility model, the terminal surface of retaining ring is isosceles triangle shape, the tip of inner tube is for drawing in the form in, and its inclination is equal to the inclination on retaining ring inclined plane.

Compared with the prior art, the beneficial effects of the utility model are that: the rotary joint of the utility model is convenient to install, stable and reliable in sealing, and the O-shaped sealing ring is extruded and expanded under the elastic action of the expansion spring, so that the sealing effect is improved; the tip of inner tube is for drawing in the form, and the retaining ring in the cooperation shoulder hole avoids debris to pile up the problem of the inside clearance of not being convenient for of shoulder hole.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged cross-sectional view of the rear portion of the outer shell of the present invention;

in the figure: 1. a housing; 11. a stepped hole; 2. an inner tube; 21. perforating; 22. a limiting ring; 3. a plugging cap; 4. an O-shaped sealing ring; 5. a first graphite bearing; 6. a second graphite bearing; 7. a tension spring; 8. a spring seat; 9. and a retainer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-3, the present invention provides the following technical solutions: a dynamic sealing rotary joint comprises a shell 1 and an inner tube 2, wherein a stepped hole 11 is formed in the shell 1, a through hole 21 is formed in the inner tube 2, one end of the inner tube 2 is rotatably embedded into the stepped hole 11, and the dynamic sealing rotary joint also comprises a blocking cap 3, and the blocking cap 3 is fixed on the end face of the shell 1 through a bolt; the inner tube 2 is provided with a limiting ring 2 positioned in a stepped hole 11, a spring seat 8 is fixed on the outer side surface of an embedding end of the inner tube 2, the inner tube 2 and the spring seat 8 are of an integrated structure, the structural strength of the spring seat 8 is ensured, an O-shaped sealing ring 4 positioned between a blocking cap 3 and the limiting ring 22 is sleeved on the inner tube 2, an expansion spring 7 positioned between the spring seat 8 and the end wall of the stepped hole 11 is further sleeved on the inner tube 2, after the inner tube 2 is installed, the inner tube 2 is pushed forwards under the elastic action of the expansion spring 7, the O-shaped sealing ring 4 is compressed by the blocking cap 3 and the limiting ring 22, and after the O-shaped sealing ring 4 is compressed, the O-shaped sealing ring can cling to the outer wall of the inner tube; a second graphite bearing 6 is arranged between the outer wall of the inner pipe 2 and the inner wall of the outer shell 1; retaining ring 9 is equipped with to the 11 inside walls of shoulder hole, and retaining ring 9 and shell 1 formula structure as an organic whole to the same with shell 1 material.

Specifically, according to the illustration in fig. 2, in this embodiment, a first graphite bearing 5 is disposed between the inner wall of the plug cap 3 and the outer wall of the inner tube 2, so as to ensure stable rotation of the inner tube 2 and improve sealing performance.

Specifically, according to fig. 2, in this embodiment, the longitudinal section of the plugging cap 3 is a "T" shaped structure, one end of the plugging cap can be embedded into the port of the stepped hole 11, and after one end of the plugging cap 3 is embedded into the port of the stepped hole 11, the plugging cap can be matched with the limiting ring 22 in position, so as to ensure that the O-shaped sealing ring 4 is tightly attached to the outer wall of the inner tube 2 and the inner wall of the outer shell 1 by the elastic action of the expansion spring 7, thereby improving the sealing effect.

Specifically, according to fig. 2, in the embodiment, the thickness of the O-ring 4 is equal to the vertical distance between the outer wall of the inner tube 2 and the side wall of the stepped hole 11, so as to ensure the sealing effect and reduce the void degree.

Specifically, according to fig. 2, in the present embodiment, the longitudinal section of the stepped hole 11 is a T-shaped structure, the embedded portion of the inner tube 2 is a larger end, and the smaller end of the stepped hole 11 has the same length as the inner diameter of the inner tube 2.

Specifically, according to fig. 3, in this embodiment, the end surface of the retainer ring 9 is in an isosceles triangle shape, the end portion of the inner tube 2 is in a folded shape, and the inclination of the end portion is equal to the inclination of the inclined surface of the retainer ring 9, after the inner tube 2 is installed, the embedded end of the inner tube can be embedded into the smaller end of the stepped hole 11, and the folded outer wall abuts against the inclined surface of the retainer ring 9, so that the problem that sundries are easily accumulated inside the stepped hole 11 and are not convenient to clean is solved.

The utility model discloses a theory of operation and use flow: when the rotary joint is used, the inner pipe 2 is communicated with the liquid inlet pipe, and the outer shell 1 is connected with the liquid outlet pipe;

the liquid medium flows into the through-hole 21 and then out of the stepped hole 11 of the outer shell 1, and due to the presence of the first graphite bearing 5 and the second graphite bearing 6, it is ensured that the outer shell 1 and the inner tube 2 can still rotate relative to each other during the transportation of the liquid medium.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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 a dynamic seal rotary joint, includes shell (1) and inner tube (2), seted up shoulder hole (11) in shell (1), seted up perforation (21) in inner tube (2), the one end of inner tube (2) rotationally imbeds in shoulder hole (11), its characterized in that: the rotary joint further comprises a blocking cap (3), and the blocking cap (3) is fixed on the end face of the shell (1); the inner pipe (2) is provided with a limiting ring (22) positioned in the stepped hole (11), the outer side surface of the embedded end of the inner pipe (2) is fixed with a spring seat (8), the inner pipe (2) is sleeved with an O-shaped sealing ring (4) positioned between the plugging cap (3) and the limiting ring (22), and the inner pipe (2) is also sleeved with a telescopic spring (7) positioned between the spring seat (8) and the end wall of the stepped hole (11); a second graphite bearing (6) is arranged between the outer wall of the inner pipe (2) and the inner wall of the shell (1); the inner side wall of the stepped hole (11) is provided with a retainer ring (9).

2. A dynamically sealed rotary joint as set forth in claim 1, wherein: a first graphite bearing (5) is arranged between the inner wall of the blocking cap (3) and the outer wall of the inner tube (2).

3. A dynamically sealed rotary joint as set forth in claim 1, wherein: the longitudinal section of the plugging cap (3) is of a T-shaped structure, and one end of the plugging cap can be embedded into the port of the stepped hole (11).

4. A dynamically sealed rotary joint as set forth in claim 1, wherein: the thickness of the O-shaped sealing ring (4) is equal to the vertical distance between the outer wall of the inner pipe (2) and the side wall of the stepped hole (11).

5. A dynamically sealed rotary joint as set forth in claim 1, wherein: the longitudinal section of the stepped hole (11) is of a T-shaped structure.

6. A dynamically sealed rotary joint as set forth in claim 1, wherein: the end face of the retainer ring (9) is in an isosceles triangle shape, the end part of the inner tube (2) is in a furling shape, and the inclination of the end part is equal to that of the inclined face of the retainer ring (9).