CN214036848U

CN214036848U - Piston sealing structure for oil-gas joint

Info

Publication number: CN214036848U
Application number: CN202023208556.XU
Authority: CN
Inventors: 刘安红
Original assignee: Changsha Solotoun Sealing Technology Co ltd
Current assignee: Changsha Solotoun Sealing Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-08-24
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a sealing washer technical field, in particular to a piston seal structure for oil gas handing-over department, including sealed body, sealed body's cross section is half waist shape, sealed body is close to one side protrusion in air cavity and is provided with the mount table, be provided with a retaining ring on the mount table, the lateral wall of retaining ring with sealed body in close contact with. The utility model discloses a retaining ring of setting in air cavity one side of sealed body for seal structure can bear or endure the higher pressure differential in both sides, and is difficult to be extruded or take place the distortion anti-roll when the piston removes, has promoted the sealed effect of piston and reliability.

Description

Piston sealing structure for oil-gas joint

Technical Field

The utility model relates to a sealing washer technical field, in particular to a piston seal structure for oil gas handing-over department.

Background

The sealing ring is a common sealing element and is often applied to sealing occasions such as pistons, shafting and the like. The conventional sealing ring mainly has the forms of O-shaped, Y-shaped, rectangular and the like, is rich in elasticity and proper in mechanical strength, is not easy to swell in a medium, has small thermal contraction effect (Joule effect), is easy to machine and form, can keep precise size, does not corrode a contact surface, does not pollute the medium and the like.

As shown in fig. 3, a piston in a piston cylinder at an oil-gas joint generally needs to be sealed, and due to the fact that the pressure on the oil pressure side is higher and the pressure on the air pressure side is lower, a conventional O-shaped sealing ring is easy to extrude due to pressure difference on one hand, and is easy to distort and prevent rolling on the other hand, and finally sealing failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a structure suitable for oil gas handing-over department piston is sealed to promote the sealed effect of piston.

In order to achieve the aim, the utility model provides a piston seal structure for oil gas handing-over department, including sealed body, sealed body is close to one side protrusion of air cavity and is provided with the mount table, be provided with a retaining ring on the mount table, the lateral wall of retaining ring with sealed body contact.

Further, the cross section of the sealing body is semi-waist-shaped.

Further, the sealing body is installed in the installation groove of the piston, and the arc-shaped outer side of the sealing body is in contact with the cylinder wall.

Further, the side wall of one side, close to the air cavity, of the retainer ring is in contact with the side wall of the mounting groove, and the outer side of the retainer ring is in contact with the cylinder wall.

Furthermore, a groove is formed in the mounting table, and the inner side of the retainer ring is clamped into the groove.

The above technical scheme of the utility model has following beneficial effect:

the utility model provides a piston seal structure for oil gas handing-over department through the retaining ring that sets up in air cavity one side of sealed body for seal structure can bear the higher pressure differential in both sides, and can not be extruded or take place the distortion anti-roll when the piston removes, has promoted the sealed effect of piston and reliability.

Drawings

Fig. 1 is a schematic view of the application of the present invention;

FIG. 2 is an enlarged schematic view of the structure of the present invention;

fig. 3 is a schematic diagram of the prior art.

[ description of reference ]

1-sealing the body; 2-a cylinder wall; 3-a piston; 4-mounting grooves; 5-an oil chamber; 6-air cavity; 7-mounting a table; 8-a retainer ring; 9-groove.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features related to the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, the embodiment of the utility model provides a piston seal structure for oil gas handing-over department, including sealing body 1, sealing body 1's cross section is half waist shape, and the curved outside contacts with cylinder wall 2, and planar inboard contacts with mounting groove 4 of piston 3. Because the pressure of the oil cavity 5 side is relatively large, the pressure of the air cavity 6 side is relatively small, on one hand, the conventional sealing ring is easily extruded due to pressure difference, and on the other hand, the conventional sealing ring is easily twisted and prevented from rolling, so that in the embodiment, the mounting table 7 is convexly arranged on one side, close to the air cavity 6, of the sealing body 1, and meanwhile, the retaining ring 8 is arranged on the mounting table 7 and is in close contact with the sealing body 1. So that the sealing body 1 is supported by the collar 8 and is more difficult to extrude, and twisting and rolling occur. Wherein, the side wall of the retainer ring 8 close to one side of the air cavity 6 is contacted with the side wall of the mounting groove 4, the outer side is contacted with the cylinder wall 2, and the contact force of the side wall of the mounting groove 4 and the friction force provided by the cylinder wall 2 form stable support for the sealing body 1.

As further improvement, be provided with recess 9 on the mount table in this embodiment, during recess 9 was gone into to the inboard card of retaining ring 8, made retaining ring 8 and sealed body 1 be connected more stably, and easy dismounting.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The piston sealing structure for the oil-gas joint comprises a sealing body and is characterized in that an installation platform is convexly arranged on one side, close to an air cavity, of the sealing body, a check ring is arranged on the installation platform, and the side wall of the check ring is in contact with the sealing body.

2. The piston seal structure for an oil and gas interface of claim 1 wherein said seal body is semi-kidney shaped in cross section.

3. The piston seal structure for an oil and gas interface of claim 2 wherein said seal body is mounted within a mounting groove of a piston, an arcuate outer side of said seal body contacting a cylinder wall.

4. The piston seal structure for an oil-gas interface of claim 3, wherein a side wall of the retainer ring on a side close to the gas chamber is in contact with a side wall of the mounting groove, and an outer side of the retainer ring is in contact with the cylinder wall.

5. The piston seal structure for an oil-gas interface of claim 1, wherein a groove is provided on the mounting table, and an inner side of the retainer ring is snapped into the groove.