CN109944999B

CN109944999B - Sealing structure

Info

Publication number: CN109944999B
Application number: CN201711383404.3A
Authority: CN
Inventors: 孙光宇; 吴衍
Original assignee: Huizhou Hydro Caresys Medical Co ltd
Current assignee: Huizhou Hydro Caresys Medical Co ltd
Priority date: 2017-12-20
Filing date: 2017-12-20
Publication date: 2024-03-26
Anticipated expiration: 2037-12-20
Also published as: CN109944999A

Abstract

The invention discloses a sealing structure, which comprises a first connecting pipe and second connecting pipes, wherein the first connecting pipe is provided with a liquid passing part and a connecting part, the connecting part is arranged at one end of the liquid passing part, a first flow cavity is arranged in the liquid passing part along the length direction of the liquid passing part, at least one mounting hole site is arranged at the connecting part, the number of the second connecting pipes is the same as that of the mounting hole sites, each second connecting pipe is correspondingly arranged in one mounting hole site, the outer diameter of each second connecting pipe is the same as the inner diameter of the mounting hole site, the second connecting pipe is provided with a second flow cavity along the length direction of the second connecting pipe, the second flow cavity is communicated with the first flow cavity, the outer wall of each second connecting pipe is annularly provided with a plurality of sealing grooves and at least one fixing groove around the axial lead direction of the second connecting pipe, the plurality of sealing grooves are close to the first flow cavity, the fixing grooves are far away from the first flow cavity, and a sealing rubber ring is arranged in each fixing groove.

Description

Sealing structure

Technical Field

The invention relates to the technical field of sealing, in particular to a sealing structure.

Background

In some communication structures between high-pressure fluids, the high-pressure fluid flows through the communication structures, and thus the communication structures are generally required to be sealed to prevent leakage of the high-pressure fluid. The traditional sealing treatment is to add a sealing rubber ring at the joint for sealing, but the sealing rubber ring is easy to deform after the use time is long, so that high-pressure fluid is leaked, and the service life of the product is shortened.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a sealing structure with good sealing effect and long service life.

The invention discloses a sealing structure, comprising:

a first connecting pipe having a liquid passing portion and a connecting portion; the connecting part is arranged at one end of the liquid passing part; a first flow cavity is arranged in the liquid passing part along the length direction of the liquid passing part; the connecting part is provided with at least one mounting hole site; and

second connecting pipes with the same number as the mounting holes; each second connecting pipe is correspondingly arranged in a mounting hole, and the outer diameter of each second connecting pipe is the same as the inner diameter of the mounting hole; the second connecting pipe is provided with a second circulation cavity along the length direction thereof, and the second circulation cavity is communicated with the first circulation cavity; the outer wall of each second connecting pipe is annularly provided with a plurality of sealing grooves and at least one fixing groove around the axial lead direction of the outer wall; the plurality of seal grooves are close to the first flow cavity; the fixed groove is far away from the first flow cavity; each fixing groove is internally provided with a sealing rubber ring.

According to one embodiment of the invention, the aperture of the second flow chamber near one end of the first flow chamber is larger than the aperture of the second flow chamber at the other end of the second flow chamber.

According to one embodiment of the present invention, the plurality of seal grooves are sequentially arranged along the central axis of the second connecting pipe, and the interval between two adjacent seal grooves is the same.

According to an embodiment of the present invention, the sealing structure further includes: the number of the fixed bayonet locks is the same as that of the second connecting pipes; at least two corresponding first mounting grooves are formed in the pipe wall of each second connecting pipe; the inner hole wall of each mounting hole site is provided with second mounting grooves which are the same as the at least two first mounting grooves in number and correspond to the at least two first mounting grooves; a fixed bayonet lock is simultaneously installed in each two first installation grooves and each two corresponding second installation grooves.

According to one embodiment of the present invention, the fixed bayonet is of a U-shaped configuration.

The invention has the beneficial effects different from the prior art that: according to the sealing structure disclosed by the invention, labyrinth seal is formed by the plurality of sealing ring grooves, so that high-pressure fluid is subjected to multiple throttling and capacity expansion effects before reaching the sealing rubber ring, the pressure of the high-pressure fluid acting on the sealing rubber ring is greatly reduced, the sealing rubber ring is not easy to deform, and the service life of a product is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is one of the cross-sectional views of a seal structure in an embodiment;

FIG. 2 is a second cross-sectional view of the seal structure in the embodiment

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a cross-sectional view B-B of FIG. 2;

fig. 5 is an enlarged view of a portion C in fig. 1.

Reference numerals illustrate: 100. a first connection pipe; 200. a second connection pipe; 110. a liquid passing part; 120. a connection part; 111. a first flow-through chamber; 121. installing hole sites; 210. a second flow-through chamber; 220. sealing grooves; 230. a fixing groove; 240. sealing rubber rings; 300. fixing the bayonet lock; 250. a first mounting groove; 1211. and a second mounting groove.

Detailed Description

Various embodiments of the invention are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the invention solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Examples:

referring to fig. 1 to 5, there are shown a first cross-sectional view, a second cross-sectional view, A-A cross-sectional view in fig. 1, B-B cross-sectional view in fig. 2, and an enlarged view of a portion C in fig. 1, respectively, of the sealing structure.

The present embodiment provides a sealing structure, which includes a first connection pipe 100 and a second connection pipe 200. The first connecting pipe 100 has a liquid passing portion 110 and a connecting portion 120, wherein the connecting portion 120 is disposed at one end of the liquid passing portion 110, a first flow cavity 111 is disposed in the liquid passing portion 110 along a length direction thereof, and the connecting portion 120 is provided with at least one mounting hole 121. The number of the second connecting pipes 200 is the same as that of the mounting holes 121, each second connecting pipe 200 is correspondingly arranged in one mounting hole 121, and the outer diameter of the second connecting pipe 200 is the same as the inner diameter of the mounting hole 121, so that when the second connecting pipe 200 is mounted on the mounting hole 121, the outer wall of the second connecting pipe 200 is abutted with the inner wall of the mounting hole 121. The second connection pipe 200 is provided with a second circulation chamber 210 along a length direction thereof, and the second circulation chamber 210 communicates with the first circulation chamber 111. The outer wall of each second connecting pipe 200 is annularly provided with a plurality of sealing grooves 220 and at least one fixing groove 230 around the axial line direction of the outer wall, the plurality of sealing grooves 220 are close to the first circulation cavity 111, and the fixing grooves 230 are far away from the first circulation cavity 111; a sealing rubber ring 240 is disposed in each fixing groove 230. In the present embodiment, the cross sections of the sealing groove 220 and the fixing groove 230 may be semicircular, rectangular, U-shaped, and rounded trapezoid. A plurality of seal grooves 220 are located between the first flow chamber 111 and the stationary groove 230. Specifically, the aperture of the second flow chamber 210 near one end of the first flow chamber 111 is larger than the aperture of the other end of the second flow chamber far from the first flow chamber 111, so that the stability of the high-pressure fluid flowing from the second connection pipe 200 to the first connection pipe 100 can be effectively enhanced. In another embodiment, a plurality of sealing grooves 220 are sequentially arranged along the central axis of the second connecting pipe 200, and the interval between two adjacent sealing grooves 220 is the same.

The number of the sealing grooves 220, the fixing grooves 230 and the sealing rubber rings 240 can be set according to the application requirement, for example, when the sealing rubber rings 240 are applied to the pump body of the medical water jet scalpel, two sealing grooves 220, a group of fixing grooves 230 and a sealing rubber ring 240 can be arranged on a second connecting pipe 200.

With continued reference to fig. 4, in order to fix the second connection pipe 200 to the first connection pipe 100 more firmly, the sealing structure of the present invention further includes fixing latches 300 in the same number as the second connection pipe 200. At least two corresponding first mounting grooves 250 are formed in the pipe wall of each second connecting pipe 200, the inner hole wall of each mounting hole 121 is provided with second mounting grooves 1211 which are the same as the at least two first mounting grooves 250 in number and correspond to the at least two first mounting grooves 250, a space which can be placed into one end of a single fixing bayonet 500 is just formed between the first mounting grooves 313 and the corresponding second mounting grooves 1211, and one fixing bayonet 300 is simultaneously mounted in each two first mounting grooves 250 and the corresponding two second mounting grooves 1211. The fixing clip 300 has a U-shaped structure, and the fixing clip 300 is more easily clipped on the pipe wall of the second connection pipe 200 by using the structure of the U-shaped opening thereof, so that both ends thereof are more easily installed between the corresponding first installation groove 313 and the corresponding second installation groove 1211. The fixing of the second connecting pipe 200 in the installation circular groove 121 is enhanced through the fixing bayonet 500, so that the design is simple, the production cost is low, and the reinforcing effect is obvious.

In summary, the sealing structure of the present invention is provided with the plurality of sealing grooves 220 and the sealing rubber ring 240, and the labyrinth seal is formed by the plurality of sealing grooves 220, so that the high-pressure fluid is subjected to multiple throttling and expansion actions before reaching the sealing rubber ring 240, the pressure of the high-pressure fluid acting on the sealing rubber ring 240 is greatly reduced, the sealing rubber ring 240 is not easy to deform, and the service life of the product is prolonged.

The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present invention, should be included in the scope of the claims of the present invention.

Claims

1. A sealing structure, characterized by comprising:

a first connection pipe (100) having a liquid passage portion (110) and a connection portion (120); the connecting part (120) is arranged at one end of the liquid passing part (110); a first circulation cavity (111) is arranged in the liquid passing part (110) along the length direction; the connecting part (120) is provided with at least one mounting hole site (121);

the number of the second connecting pipes (200) is the same as that of the mounting holes (121); each second connecting pipe (200) is correspondingly arranged in one mounting hole site (121), and the outer diameter of each second connecting pipe (200) is the same as the inner diameter of each mounting hole site (121); the second connecting pipe (200) is provided with a second circulation cavity (210) along the length direction thereof, and the second circulation cavity (210) is communicated with the first circulation cavity (111); the outer wall of each second connecting pipe (200) is annularly provided with a plurality of sealing grooves (220) and at least one fixing groove (230) around the axial line direction of the outer wall; a plurality of said seal grooves (220) adjacent said first flow chamber (111); -said fixed slot (230) is remote from said first flow-through chamber (111); a sealing rubber ring (240) is arranged in each fixing groove (230); the plurality of sealing grooves (220) are sequentially arranged along the central axis of the second connecting pipe (200), and the intervals between two adjacent sealing grooves (220) are the same; and

the same number of the fixed bayonet locks (300) as the second connecting pipes (200); at least two corresponding first mounting grooves (250) are formed in the pipe wall of each second connecting pipe (200); the inner hole wall of each mounting hole site (121) is provided with second mounting grooves (1211) which are the same as and correspond to the at least two first mounting grooves (250); each two first mounting grooves (250) and two corresponding second mounting grooves (1211) are internally provided with one fixed bayonet (300) at the same time.

2. The seal structure according to claim 1, wherein: the aperture of the second flow chamber (210) near one end of the first flow chamber (111) is larger than the aperture of the other end of the second flow chamber far from the first flow chamber (111).

3. The seal structure according to claim 1, wherein: the fixed bayonet (300) is of a U-shaped structure.