CN220506104U

CN220506104U - Pipeline sealing structure and exhaust pipe

Info

Publication number: CN220506104U
Application number: CN202322078567.8U
Authority: CN
Inventors: 韩祥祥; 刘伟
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-02-20
Anticipated expiration: 2033-08-03

Abstract

The utility model relates to the technical field of sealing, and provides a pipeline sealing structure and an exhaust pipe. The female connector is provided with a stepped hole comprising a first abutting surface, and the male connector is in plug-in fit with the female connector; the sealing piece is annular, and comprises a first sealing part, a second sealing part and a third sealing part, wherein the first sealing part is fixed with the axial end face of the male connector along the circumferential direction, the second sealing part is in circumferential butt joint with the first butt joint surface, two ends of the first connecting part are respectively connected with the first sealing part and the third sealing part in a rotating mode, two ends of the second connecting part are respectively connected with the second sealing part and the third sealing part in a rotating mode, and the third sealing part can be in butt joint with the inner peripheral wall of the female connector. In this way, the seal is made easy to install and the seal is able to provide multiple seals to improve tightness.

Description

Pipeline sealing structure and exhaust pipe

Technical Field

The utility model relates to the technical field of sealing, in particular to a pipeline sealing structure and an exhaust pipe.

Background

In order to ensure tightness between pipelines, a sealing ring and a braiding ring are arranged at the connecting position of a male joint and a female joint, and in use, the sealing element is found to be in butt joint sealing with the male joint and the female joint only along the axial direction, so that the sealing effect is poor, fluid in the pipeline can always leak from the connecting position of the male joint and the female joint, and therefore, the outer peripheral side wall of the existing sealing ring is often provided with a bulge for being in butt joint with the inner peripheral wall of the female joint to form new sealing, so that the sealing effect is enhanced.

But at the in-process that the male joint inserted the female joint against the sealing ring, the sealing ring had the contained angle owing to the atress is uneven, originally put the gesture and the axis of female joint exists, perhaps the inner peripheral wall of female joint is relatively coarse, can all lead to the sealing member to take place the slope of relative axis in female joint to block between male joint and female joint, owing to there is the clearance in sealing member and one of them, can't realize sealed effect, both can't normally use, consequently need adjust the gesture of putting of sealing member, nevertheless under this circumstances, the sealing member is difficult to dismantle again, leads to assembly efficiency to reduce.

Therefore, a pipe sealing structure and an exhaust pipe are needed to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a pipeline sealing structure and an exhaust pipe, which can enable a sealing member to be easily installed, and the sealing member can provide multiple sealing so as to improve the sealing performance.

To achieve the purpose, the utility model adopts the following technical scheme:

a pipe sealing structure comprising:

a male connector;

the female connector is provided with a stepped hole comprising a first abutting surface, and the male connector is in plug-in fit with the female connector;

and the sealing piece is in a circular ring shape and comprises a first sealing part, a first connecting part, a second sealing part, a second connecting part and a third sealing part, wherein the first sealing part is fixed with the axial end face of the male connector along the circumferential direction, the second sealing part is abutted with the first abutting surface along the circumferential direction, the two ends of the first connecting part are respectively connected with the first sealing part and the third sealing part in a rotating way, the two ends of the second connecting part are respectively connected with the second sealing part and the third sealing part in a rotating way, and the third sealing part can be abutted with the inner circumferential wall of the female connector.

As a preferable embodiment of the pipe sealing structure, the first sealing portion and the axial end face of the male joint and the second sealing portion and the first abutting face are both in surface contact.

As a preferable embodiment of the pipe sealing structure, the first sealing portion is welded to an axial end surface of the male joint.

As a preferable technical scheme of the pipe sealing structure, an installation groove is formed in an axial end face of the male connector, and the first sealing portion is inserted into the installation groove.

As a preferable aspect of the above-mentioned pipe sealing structure, an included angle between the first connecting portion and the second connecting portion is an acute angle.

As a preferable embodiment of the pipe sealing structure, an obtuse angle is interposed between the second sealing portion and the second connecting portion.

As a preferable aspect of the above pipe sealing structure, the stepped hole further includes a first peripheral side wall, and the outer peripheral wall of the male connector is gap-sealed with the first peripheral side wall.

As a preferable aspect of the above pipe sealing structure, the female joint further includes a second abutment surface, the male joint includes a shoulder, and the second abutment surface and the shoulder are abutted by the sealing member.

As a preferable aspect of the above-mentioned pipe sealing structure, the first contact surface is provided with a supporting portion protruding in a circumferential direction thereof, and the second sealing portion is provided with the supporting portion in a sleeved manner.

The exhaust pipe comprises a plurality of pipe fittings, and the pipe fittings are connected through the pipeline sealing structure.

The utility model has the beneficial effects that:

before the male connector and the female connector are spliced, a first sealing part of the sealing element and the axial end face of the male connector are fixed in the circumferential direction; in the plugging process, the male connector carries the sealing element to extend into the stepped hole of the female connector along the axial direction, and when the second sealing part is abutted with the first abutting surface of the female connector, the sealing element fills a gap between the axial end surface of the male connector and the first abutting surface of the female connector, so that fluid cannot escape from the gap. And further moving the male connector along the axial direction, and deforming the sealing element by extrusion along the axial direction, wherein the third sealing part extends outwards along the radial direction until being abutted with the inner peripheral wall of the female connector, so that the installation is completed.

So set up, in advance fixed sealing member and public joint for sealing member and the coaxial dislocation along radial that just can not take place of public joint are placed, maintain the preset of sealing member and put the gesture, the butt of the first butt face of second sealing portion and female joint makes sealing member fill along the axial and realizes sealed effect between public joint and female joint. Further, the third seal portion is in contact with the inner peripheral wall of the female joint in the circumferential direction, so that the sealing effect can be enhanced, and if a fluid escapes from the contact position between the second seal portion and the first contact surface, the third seal portion can perform a sealing function again, and the third seal portion is in contact with the inner peripheral wall of the female joint, and can act on the second seal portion via the second connecting portion, so that the second seal portion is kept in contact with the first contact surface.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of a pipeline sealing structure according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partial enlarged view at B in fig. 1.

In the figure:

10. a male connector; 11. a shaft shoulder; 12. an annular protrusion;

20. a female joint; 21. a first abutment surface; 22. a first peripheral sidewall; 23. a second abutment surface; 24. a second peripheral sidewall;

30. a seal; 31. a first sealing part; 32. a second sealing part; 33. a third sealing part; 34. a first connection portion; 35. a second connecting portion; 36. and (5) sealing the groove.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 3, the present application provides a pipe sealing structure including a male connector 10, a female connector 20, and a sealing member 30. Wherein, the female connector 20 is provided with a stepped hole comprising a first abutting surface 21, and the male connector 10 is in plug-in fit with the female connector 20; the seal 30 is annular, and includes a first seal portion 31, a first connection portion 34, a second seal portion 32, a second connection portion 35, and a third seal portion 33, wherein the first seal portion 31 is circumferentially fixed to an axial end surface of the male connector 10, the second seal portion 32 is circumferentially abutted to the first abutment surface 21, both ends of the first connection portion 34 are respectively rotatably connected to the first seal portion 31 and the third seal portion 33, both ends of the second connection portion 35 are respectively rotatably connected to the second seal portion 32 and the third seal portion 33, and the third seal portion 33 is abutted to an inner peripheral wall of the female connector 20.

Specifically, the sealing member 30 is in a ring-shaped structure, the middle portion of the sealing member 30 is provided with a relief hole, the inner peripheral wall of the sealing member 30 is provided with a sealing groove 36 along the circumferential direction, the sealing member is formed by sequentially enclosing the first sealing portion 31, the first connecting portion 34, the third sealing portion 33, the second connecting portion 35 and the second sealing portion 32, so that when the sealing member 30 is extruded along the axial direction of the sealing member, the distance between the first sealing portion 31 and the second sealing portion 32 in the axial direction is reduced, the included angle between the first sealing portion 31 and the first connecting portion 34 is increased, the included angle between the second sealing portion 32 and the second connecting portion 35 is also increased, and the length of the first connecting portion 34 and the second connecting portion 35 is fixed, so that the third sealing portion 33 is supported by the first connecting portion 34 and the second connecting portion 35 to move along the radial direction away from the axis of the sealing member 30, and the maximum radius of the sealing member 30 is increased.

Before the male connector 10 and the female connector 20 are spliced, the first sealing part 31 of the sealing element 30 and the axial end surface of the male connector 10 are fixed along the circumferential direction; during the plugging process, the male connector 10 carries the sealing member 30 and axially extends into the stepped hole of the female connector 20, and when the second sealing portion 32 abuts against the first abutting surface 21 of the female connector 20, the sealing member 30 fills an axial gap between the axial end surface of the male connector 10 and the first abutting surface 21 of the female connector 20, so that fluid cannot escape from the gap. Further, the male connector 10 is moved in the axial direction, the seal member 30 is pressed in the axial direction to deform, and the third seal portion 33 is extended radially outward until it abuts against the inner peripheral wall of the female connector 20, thereby completing the installation.

By means of the arrangement, the sealing element 30 and the male connector 10 are fixed in advance, the sealing element 30 and the male connector 10 are coaxially placed, relative radial dislocation cannot occur, the preset placing posture of the sealing element 30 is maintained, the second sealing portion 32 abuts against the first abutting surface 21 of the female connector 20, and the sealing element 30 is axially filled between the male connector 10 and the female connector 20 to achieve a sealing effect. Further, the third seal portion 33 is in contact with the inner peripheral wall of the female joint 20 in the circumferential direction, so that the sealing effect can be enhanced, and if a fluid escapes from the contact position between the second seal portion 32 and the first contact surface 21, the third seal portion 33 can perform a sealing function again, and the third seal portion 33 can be in contact with the inner peripheral wall of the female joint 20, and the second seal portion 32 can be held in contact with the first contact surface 21 by the second connection portion 35.

Further, the sealing member 30 is integrally formed, and the connection positions of the first sealing portion 31, the first connection portion 34, the third sealing portion 33, the second connection portion 35 and the second sealing portion 32 can be elastically deformed and bent.

Alternatively, the first sealing portion 31 is in surface contact with the axial end surface of the male connector 10 and the second sealing portion 32 is in surface contact with the first abutment surface 21. Specifically, the first sealing portion 31 is at least partially abutted to form surface contact with the axial end surface of the male connector 10, and similarly, the second sealing portion 32 is at least partially abutted to form surface contact with the first abutting surface 21, so that the sealing area is relatively large, and the sealing performance is further improved.

Alternatively, the first sealing portion 31 is welded to the axial end surface of the male connector 10. Through welded fastening, the structure is relatively simple, does not need other mechanical structures to cooperate with, and is not influenced by high temperature or humid environment.

Optionally, an axial end surface of the male connector 10 is provided with a mounting groove, and the first sealing portion 31 is inserted into the mounting groove. Specifically, the axial terminal surface of male joint 10 forms the step structure, form the shaft shoulder between big footpath section and the path section, the external wall of path section forms the mounting groove with the shaft shoulder, the radial dimension of the external wall of path section equals the radial dimension of sealing member 30 internal wall, and the axial dimension of path section is less than or equal to first sealing portion 31 in axial dimension, during the installation, insert first sealing portion 31 in the mounting groove for sealing member 30 cover is located the path end, in order to restrict sealing member 30 along its radial removal, and then make things convenient for welding work, improve welded accuracy.

Optionally, the first connecting portion 34 and the second connecting portion 35 have an acute angle. When the male connector 10 is inserted into the female connector 20, the second seal portion 32 abuts against the first abutment surface 21, and when the male connector 10 is further axially fed, the first connection portion 34 and the second connection portion 35 are disposed at an acute angle, so that the third seal portion 33 can move only in a direction away from the axis thereof to abut against the inner peripheral wall of the female connector 20 when the first connection portion 34 and the second connection portion 35 approach each other. So as to prevent the third seal portion 33 from moving in the radial direction toward the axis direction and losing the sealing function.

Optionally, an obtuse angle is interposed between the second sealing portion 32 and the second connecting portion 35. The sealing element 30 is fixed on the axial end surface of the male connector 10, and the second sealing portion 32 and the second connecting portion 35 are clamped at an obtuse angle to form a guiding angle, so that the guiding angle can play a guiding role when the male connector 10 and the female connector 20 are connected in an inserting mode, and the male connector 10 can be connected with the female connector 20 in an inserting mode more easily.

Optionally, the stepped hole further includes a first peripheral sidewall 22, and the peripheral wall of the male connector 10 is gap-sealed with the first peripheral sidewall 22. The gap seal is a seal form which takes advantage of the small gap between the components to play a sealing role, and because the seal form is not required to be additionally provided for matching with the components, the structure is simple, the gap seal is formed after the male connector 10 and the female connector 20 are spliced, and the gap seal forms another seal to intercept the fluid escaping from the self-sealing piece 30.

Optionally, the female connector 20 further comprises a second abutment surface 23, the male connector 10 comprises a shoulder 11, and the second abutment surface 23 and the shoulder 11 are abutted by a seal 30. Specifically, the stepped hole in the female connector 20 further includes a second peripheral sidewall 24, a second abutting surface 23 is formed between the second peripheral sidewall 24 and the first peripheral sidewall 22, the second abutting surface 23 is close to an axial end surface of the male connector 10 on the plugging side of the female connector 20 relative to the first abutting surface 21, an annular protrusion 12 is circumferentially arranged on the outer peripheral wall of the male connector 10, a shaft shoulder 11 is formed towards one side of the female connector 20, and two sealing elements 30 are arranged on the pipeline sealing structure, one of the sealing elements is arranged between the axial end surface of the male connector 10 and the first abutting surface 21, and the other sealing element is arranged between the second abutting surface 23 and the shaft shoulder 11.

In the present embodiment, the seal 30 is fitted around the outer peripheral wall of the male connector 10, the first seal portion 31 is fixed to the shoulder 11 of the male connector 10, the second seal portion 32 is in contact with the second contact surface 23, and the third seal portion 33 is in contact with the second outer peripheral wall of the female connector 20.

In other embodiments, the third sealing portion 33 can abut against the outer peripheral wall of the male connector 10.

In other embodiments, the first seal portion 31 of the seal 30 is fixed to the second abutment surface 23, and the second seal portion 32 abuts the shoulder 11.

Optionally, in the axial direction, the distance between the axial end surface of the male connector 10 and the shoulder 11 is equal to the distance between the first abutment surface 21 and the second abutment surface 23 in the female connector 20.

Alternatively, the first abutment surface 21 is provided with a supporting portion protruding along a circumferential direction thereof, and the second sealing portion 32 is sleeved on the supporting portion. In this way, when the seal 30 receives an axial force, the inner peripheral wall of the second seal 30 is supported by the support portion so as not to move in the axial direction, and further, the second connection portion 35 can support the third seal portion 33 in contact with the inner peripheral wall of the female joint 20.

The exhaust pipe comprises a plurality of pipe fittings, and the pipe fittings are connected through the pipeline sealing structure. Since the exhaust in the exhaust pipe generally has a relatively high temperature, the pipe is easily expanded in the axial direction after being heated, so that the first abutting surface 21 tends to be further axially close to the axial end surface of the male joint 10, and the abutting relationship between the second sealing portion 32 and the first abutting surface 21, and between the third sealing portion 33 and the inner peripheral wall of the female joint 20 is tighter under the action of the axial force.

Optionally, the seal 30 is a superalloy component. Since the environment in the exhaust pipe is a high temperature environment, in order to avoid deformation of the sealing member 30 at a high temperature, it is made of a high temperature resistant alloy to ensure its sealability.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. Pipeline seal structure, its characterized in that includes:

a male connector (10);

the female connector (20) is provided with a stepped hole comprising a first abutting surface (21), and the male connector (10) is in plug-in fit with the female connector (20);

the sealing element (30), sealing element (30) is the ring form, including first sealing portion (31), first connecting portion (34), second sealing portion (32), second connecting portion (35) and third sealing portion (33), first sealing portion (31) with the axial terminal surface of pin joint (10) is fixed along circumference, second sealing portion (32) with first butt face (21) is along circumference butt, the both ends of first connecting portion (34) respectively with first sealing portion (31) with third sealing portion (33) rotate to be connected, the both ends of second connecting portion (35) respectively with second sealing portion (32) with third sealing portion (33) rotate to be connected, third sealing portion (33) can with female joint (20) inner peripheral wall butt.

2. The pipe sealing structure according to claim 1, wherein the first sealing portion (31) is in surface contact with an axial end surface of the male connector (10) and the second sealing portion (32) is in surface contact with the first abutment surface (21).

3. The pipe sealing structure according to claim 1, wherein the first sealing portion (31) is welded and fixed to an axial end face of the male joint (10).

4. A pipe sealing structure according to claim 3, wherein the axial end face of the male connector (10) is provided with a mounting groove, and the first sealing portion (31) is inserted into the mounting groove.

5. The pipe sealing structure according to claim 1, wherein the first connection portion (34) forms an acute angle with the second connection portion (35).

6. The pipe sealing structure according to claim 1, wherein an obtuse angle is interposed between the second sealing portion (32) and the second connecting portion (35).

7. The pipe sealing structure according to claim 1, wherein the stepped bore further comprises a first peripheral side wall (22), and the outer peripheral wall of the male connector (10) is gap-sealed with the first peripheral side wall (22).

8. The pipe sealing structure according to claim 1, wherein the female joint (20) further comprises a second abutment surface (23), the male joint (10) comprises a shoulder (11), and the second abutment surface (23) and the shoulder (11) are abutted by the seal (30).

9. The pipe sealing structure according to claim 1, wherein the first abutment surface (21) is provided with a supporting portion protruding in a circumferential direction thereof, and the second sealing portion (32) is sleeved on the supporting portion.

10. An exhaust pipe comprising a plurality of pipe members, a plurality of said pipe members being connected by a pipe sealing structure as claimed in any one of claims 1 to 9.