CN214743299U

CN214743299U - Positive and negative pressure sealing ring and pipeline connecting structure

Info

Publication number: CN214743299U
Application number: CN202121039377.XU
Authority: CN
Inventors: 罗剑锋; 王福利; 仇旭东
Original assignee: Guangdong Fusite Fuild Technology Co ltd
Current assignee: Guangdong Fusite Fuild Technology Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-11-16
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a positive negative pressure seal circle, include: a seal ring body, the seal ring body comprising: the end face sealing boss is formed on the inner wall of the sealing ring body and extends inwards; global sealed boss, global sealed boss forms the inner wall of sealing washer body inwards stretches out, global sealed boss includes first terminal surface and second terminal surface, first terminal surface orientation the end face sealed boss, be formed with the malleation effect groove on the first terminal surface, the malleation effect groove sets up the one side of the adjacent sealing washer body of global sealed boss, be formed with the negative pressure effect groove on the second terminal surface. The positive and negative pressure sealing ring can enable the inner side surface of the peripheral sealing boss to be attached to an external pipe fitting more tightly in a positive pressure environment and a negative pressure environment, and the positive and negative pressure sealing ring has good positive and negative pressure sealing performance.

Description

Positive and negative pressure sealing ring and pipeline connecting structure

Technical Field

The utility model relates to a pipe connection technical field, in particular to positive negative pressure sealing washer.

Background

The pipeline system is widely applied in industrial production, the working conditions of the pipeline in the industrial production can be divided into positive pressure and negative pressure, the sealing ring can simultaneously serve for the two environments under the general pressure condition, but for the environment in the pipeline with certain pressure, a specific sealing ring is needed to strengthen the sealing force under the positive pressure environment, and the sealing ring capable of strengthening the positive pressure can well ensure the sealing under the positive pressure environment when in use, but is not suitable for the negative pressure environment, so that the use of the pipeline system is limited.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

The utility model provides a positive negative pressure seal circle, include: a seal ring body, the seal ring body comprising:

the end face sealing boss is formed on the inner wall of the sealing ring body and extends inwards;

global sealed boss, global sealed boss forms the inner wall of sealing washer body inwards stretches out, global sealed boss includes first terminal surface and second terminal surface, first terminal surface orientation the end face sealed boss, be formed with the malleation effect groove on the first terminal surface, the malleation effect groove sets up the one side of the adjacent sealing washer body of global sealed boss, be formed with the negative pressure effect groove on the second terminal surface.

The utility model has the advantages that: when the positive-negative pressure sealing ring is in a positive pressure environment, the pressure between the end face sealing boss and the peripheral face sealing boss is higher than the atmospheric pressure, and the first end face and the second end face are provided with the positive pressure action groove and the negative pressure action groove, so that the peripheral face sealing boss can form a trend of swinging back to the end face sealing boss by taking the positions of the positive pressure action groove and the negative pressure action groove as fulcrums; similarly, when the sealing ring is in a negative pressure environment, the pressure between the end face sealing boss and the peripheral face sealing boss is smaller than the atmospheric pressure, so that the peripheral face sealing boss tends to swing towards the end face sealing boss, the inner side face of the peripheral face sealing boss can be attached to an external pipe fitting more tightly under the positive pressure environment and the negative pressure environment, the positive and negative pressure sealing ring has the capability of strengthening the sealing performance under the positive pressure environment and the negative pressure environment, and the positive and negative pressure sealing ring has good positive and negative pressure sealing performance.

In addition, the formation of the negative pressure acting groove enables the peripheral surface seal table to be more easily swung outward when the positive pressure acts on the positive pressure acting groove.

As a sub-solution of the above technical solution, an outer side surface of the positive pressure acting groove is connected to an inner edge of the seal ring body.

As a sub-solution of the above technical solution, the outer side surface and the inner side surface of the positive pressure acting groove are transitionally connected by an arc section.

As a sub-scheme of the above technical scheme, the negative pressure action groove and the positive pressure action groove are arranged in a staggered manner, and the negative pressure action groove is located in a direction in which the positive pressure action groove points to the inner side of the seal ring body.

As a sub-solution of the above technical solution, a first sealing conical surface is further formed on the circumferential sealing boss, the first sealing conical surface is disposed on the second end surface, and a radius of a side of the first sealing conical surface facing the end sealing boss along a side from the circumferential sealing boss to the end sealing boss, the side deviating from the end sealing boss, is larger than a radius of a side adjacent to the end sealing boss.

As a sub-solution of the above technical solution, a second sealing conical surface is further formed on the peripheral surface sealing boss, the second sealing conical surface is disposed on the first end surface, and an outer diameter of the second sealing conical surface facing away from the side adjacent to the end surface sealing boss is larger than an outer diameter of the second sealing conical surface facing away from the end surface sealing boss.

As a sub-scheme of the above technical scheme, the second end face is coplanar with the end face of the seal ring body, the second end face is annular and obliquely arranged, and the second end face gradually expands outwards along the direction in which the circumferential surface seal boss points to the end surface seal boss.

As a sub-solution of the above technical solution, the number of the peripheral surface sealing bosses is two, and the two peripheral surface sealing bosses are symmetrically arranged with respect to the end surface sealing boss.

The utility model discloses still provide the pipe connection structure, include:

the positive and negative pressure sealing ring of any one of the above technical schemes;

the positive and negative pressure sealing rings are arranged in the pipe joint;

the pipe fitting extends into the sealing ring body, the outer peripheral surface of the pipe fitting is abutted against the inner side surface of the peripheral surface sealing boss, and the end surface of the pipe fitting is abutted against the end surface sealing boss;

a locking member that locks the pipe to the pipe joint.

The utility model provides a pipeline connection structure, owing to included any one of above-mentioned technical scheme positive negative pressure seal circle, consequently it also has the beneficial effect of above-mentioned positive negative pressure seal circle.

As some sub-solutions of the above solution, the outer circumference of the pipe is formed with a limiting flange, and the inner wall of the locking piece is formed with a limiting groove, and the limiting flange is limited in the limiting groove.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic sectional view of the pipe connection structure of the present invention;

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

FIG. 3 is a schematic diagram of a pipe connection under positive pressure;

fig. 4 is a schematic structural view of the pipeline connection structure in a negative pressure environment.

In the drawings: 1-a seal ring body; 11-end face sealing boss; 12-peripheral face sealing boss; 121-a first end face; 1211-positive pressure action tank; 122-a second end face; 1221-a negative pressure action tank; 123-a first sealing cone; 124-a second sealing cone; 2-pipe joint; and 3-pipe fitting.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, a plurality of terms means an indefinite amount, and a plurality of terms means two or more, and the terms greater than, less than, exceeding, etc. are understood to include no essential numbers, and the terms greater than, less than, within, etc. are understood to include essential numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Appearing throughout and/or representing three side-by-side scenarios, e.g., A and/or B represents a scenario satisfied by A, a scenario satisfied by B, or a scenario satisfied by both A and B.

In the description of the present invention, if there is a phrase containing a plurality of parallel features, the phrase defined therein is the closest feature, for example: b, C disposed on A, E connected to D, B disposed on A, E connected to D, C is not limited; however, terms indicating relationships between features such as "spaced apart", "arranged in a ring", etc. do not fall within this category. The phrase preceded by the word "mean" indicates that it is a definition of all features in the phrase, and if it is B, C, D, it indicates that both B, C and D are located on a. The statement with the omitted subject is the subject of the previous statement, namely, the statement A is provided with B and C, which means that the statement A is provided with B and A comprises C.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Embodiments of the present invention will be described below with reference to fig. 1 to 4.

The utility model discloses pipeline connection structure, include: positive and negative pressure sealing rings, a pipe joint 2 and a pipe fitting 3;

the positive and negative pressure sealing rings are arranged in the pipe joint 2;

the pipe fitting 3 extends into the sealing ring body 1 included by the positive and negative pressure sealing ring, the peripheral surface of the pipe fitting 3 is abutted against the inner side surface of a peripheral surface sealing boss 12 included by the positive and negative pressure sealing ring, and the end surface of the pipe fitting 3 is abutted against an end surface sealing boss 11 included by the positive and negative pressure sealing ring;

locking elements (not shown in the figures) which lock the pipe elements 3 to the pipe joint 2.

This pipeline connection structure is owing to included positive negative pressure sealing washer for this pipeline connection structure all can play better sealed effect when letting in malleation or negative pressure in pipe fitting 3, has improved among the prior art sealed not enough that only has better sealing capacity under malleation environment or only negative pressure environment, has widened pipe-line system's suitability through improving sealed.

The specific positive negative pressure sealing washer includes: sealing washer body 1, sealing washer body 1 includes:

the end face sealing boss 11 is formed on the inner wall of the sealing ring body 1, and the end face sealing boss 11 extends inwards;

the sealing structure comprises a circumferential sealing boss 12, wherein the circumferential sealing boss 12 is formed on the inner wall of the sealing ring body 1 and extends inwards, the circumferential sealing boss 12 comprises a first end surface 121 and a second end surface 122, the first end surface 121 faces the end surface sealing boss 11, a positive pressure action groove 1211 is formed in the first end surface 121, the positive pressure action groove 1211 is arranged on one side, close to the sealing ring body 1, of the circumferential sealing boss 12, and a negative pressure action groove 1221 is formed in the second end surface 122.

When the pipe fitting 3 extends into the pipe joint 2 and is sealed by the positive and negative pressure sealing ring, the front end of the pipe fitting 3 is abutted against the end face sealing boss 11 to form a first seal, the periphery of the pipe fitting 3 is abutted against the inner edge of the peripheral face sealing boss 12 to form a second seal, and the negative pressure acting groove 1221 is communicated with the outside through the pipe joint 2. When the interior of the pipe fitting 3 is in a positive pressure environment, referring to fig. 3, if the first seal is leaked, the pressure in the closed cavity formed by the outer wall of the pipe fitting 3, the circumferential sealing boss 12, the inner wall of the sealing ring body 1 and the end sealing boss 11 is increased, the pressure between the end sealing boss 11 and the circumferential sealing boss 12 is higher than the atmospheric pressure, because the positive pressure action groove 1211 and the negative pressure action groove 1221 are arranged on the first end surface 121 and the second end surface 122, the circumferential sealing boss 12 can form a tendency of swinging back to the end sealing boss 11 with the positions of the positive pressure action groove 1211 and the negative pressure action groove 1221 as a fulcrum, and under the action of the tendency, the first inner part included in the positive pressure action groove 1211 swings towards the pipe fitting 3 to press the circumferential sealing boss 12 inwards under the positive pressure environment, so that the contact between the circumferential sealing boss 12 and the outer wall of the pipe fitting 3 is tighter, thereby can guarantee sealed effect better under the malleation environment.

The positive pressure groove 1211 and the negative pressure groove 1221 are arranged, so that the inner side of the sealing ring body 1 is easy to swing when the sealing ring body 1 bears positive pressure, the sealing pressure of the sealing ring body 1 on the pipe fitting 3 is increased, the sealing ring body 1 is easy to deform, the peripheral sealing boss 12 is more attached to the outer wall of the pipe fitting 3, and the sealing performance is further improved.

When the pipe fitting is in a negative pressure environment, referring to fig. 4, the pressure of the closed cavity is smaller than the atmospheric pressure, the second inner side portion included in the negative pressure acting groove 1221 swings towards the pipe fitting 3 under the negative pressure environment, the peripheral surface sealing boss 12 and the outer wall of the pipe fitting 3 are enabled to be in closer contact, and the sealing effect is guaranteed.

Further, the outer side surface of the positive pressure groove 1211 is connected to the inner edge of the seal ring body 1. When the positive pressure and the negative pressure act on the positive pressure acting groove 1211, the peripheral surface sealing boss 12 tends to swing about a portion thereof contacting the seal ring body 1 as a fulcrum, the peripheral surface sealing boss 12 tends to swing as a whole, the supporting strength of the swing portion is high, and the sealing of the pipe 3 can be enhanced by the swing tendency.

Further, the outer side surface and the inner side surface of the positive pressure action groove 1211 are transitionally connected by an arc-shaped section. The outer side surface and the inner side surface of the positive pressure action groove 1211 are transitionally connected by an arc-shaped section, so that the connection strength of the positive pressure action groove 1211 can be increased.

Further, the negative pressure acting groove 1221 and the positive pressure acting groove 1211 are arranged in a staggered manner, and the negative pressure acting groove 1221 is located in a direction in which the positive pressure acting groove 1211 points to the inner side of the sealing ring body 1. The negative pressure groove 1221 and the positive pressure groove 1211 are arranged in a staggered manner, so that the strength loss caused by the groove structure formed on the circumferential sealing boss 12 can be reduced, the tight pressure between the inner side wall of the circumferential sealing boss 12 and the pipe fitting 3 can be ensured, and the sealing capability can be ensured.

Further, a first sealing conical surface 123 is formed on the circumferential surface sealing boss 12, the first sealing conical surface 123 is disposed on the second end surface 122, and a radius of one side of the first sealing conical surface 123, which is away from the end surface sealing boss 11, along a side from the circumferential surface sealing boss 12 to the end surface sealing boss 11 is larger than a radius of one side adjacent to the end surface sealing boss 11. The arrangement of the first sealing conical surface 123 enables the peripheral sealing boss 12 to contract inwards when the pipe fitting 3 extends into the sealing ring body 1, and when the sealing ring body 1 is in a negative pressure environment, the peripheral sealing boss 12 swings under the negative pressure, the first sealing conical surface 123 rotates to abut against the outer wall of the pipe fitting 3, the contact area between the pipe fitting 3 and the peripheral sealing boss 12 under the negative pressure environment is increased due to the arrangement of the first sealing conical surface, sealing strengthening is facilitated, and sealing capacity is improved.

Further, a second sealing conical surface 124 is formed on the peripheral surface sealing boss 12, the second sealing conical surface 124 is disposed on the first end surface 121, and an outer diameter of the second sealing conical surface 124 facing away from the side adjacent to the end surface sealing boss 11 is larger than an outer diameter of the second sealing conical surface 124 facing away from the end surface sealing boss 11. Set up second sealing conical surface 124 on first terminal surface 121, reduced the area of the sealed boss 12 medial surface of global on the one hand, the area of contact with sealed boss 12 of global is less when pipe fitting 3 inserts sealing washer body 1, pipe fitting 3 is changeed and is inserted in sealing washer body 1, on the other hand, when sealing washer body 1 is in the malleation environment, sealed boss 12 of global receives the malleation and takes place the swing back second sealing conical surface 124 and the pipe fitting 3 of peripheral equipment and hug closely, improve the area of contact of pipe fitting 3 and sealed boss 12 of global under the malleation state, improve the leakproofness.

Further, the second end surface 122 is coplanar with the end surface of the seal ring body 1, the second end surface 122 is annular and is obliquely arranged, and the second end surface 122 gradually expands outwards along the direction in which the peripheral surface seal boss 12 points to the end surface seal boss 11. The second end surface 122 is configured to be inclined, so that the installation and positioning of the seal ring body 1 can be facilitated, and the installation of the seal ring body 1 into the pipe joint 2 can be facilitated.

Further, the number of the peripheral surface sealing bosses 12 is two, and the two peripheral surface sealing bosses 12 are symmetrically arranged with respect to the end surface sealing boss 11. By arranging the two peripheral sealing bosses 12, the two side pipe fittings 3 can be sealed, so that the positive and negative pressure sealing ring can conveniently realize the sealing connection of the two pipe fittings 3.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments, but is capable of various changes and modifications without departing from the spirit of the invention.

Claims

1. Positive negative pressure sealing washer, its characterized in that: the method comprises the following steps: sealing washer body (1), sealing washer body (1) includes:

the end face sealing boss (11), the end face sealing boss (11) is formed on the inner wall of the sealing ring body (1) and extends inwards;

global sealed boss (12), global sealed boss (12) form and are in the inner wall of sealing washer body (1) and inwards stretch out, global sealed boss (12) include first terminal surface (121) and second terminal surface (122), first terminal surface (121) orientation end face seal boss (11), be formed with positive pressure effect groove (1211) on first terminal surface (121), positive pressure effect groove (1211) set up the one side of global sealed boss (12) neighbouring sealing washer body (1), be formed with negative pressure effect groove (1221) on second terminal surface (122).

2. The positive and negative pressure seal ring according to claim 1, wherein: the outer side surface of the positive pressure action groove (1211) is connected with the inner edge of the sealing ring body (1).

3. The positive and negative pressure seal ring according to claim 2, wherein: the outer side surface and the inner side surface of the positive pressure action groove (1211) are in transition connection through arc sections.

4. The positive and negative pressure seal ring according to claim 1, wherein: the negative pressure action groove (1221) and the positive pressure action groove (1211) are arranged in a staggered mode, and the negative pressure action groove (1221) is located in the direction, pointing to the inner side of the sealing ring body (1), of the positive pressure action groove (1211).

5. The positive and negative pressure seal ring according to claim 1, wherein: the peripheral surface sealing boss (12) is further provided with a first sealing conical surface (123), the first sealing conical surface (123) is arranged on the second end surface (122), and the radius of one side, away from the end surface sealing boss (11), of one side, pointing to the end surface sealing boss (11) along the peripheral surface sealing boss (12), of the first sealing conical surface (123) is larger than that of one side, close to the end surface sealing boss (11).

6. The positive-negative pressure seal ring according to claim 1 or 5, characterized in that: the peripheral surface sealing boss (12) is further provided with a second sealing conical surface (124), the second sealing conical surface (124) is arranged on the first end surface (121), and the outer diameter of the second sealing conical surface (124) facing to the side far away from the end surface sealing boss (11) is larger than the outer diameter of the side far away from the end surface sealing boss (11).

7. The positive and negative pressure seal ring according to claim 1, wherein: the second end face (122) is coplanar with the end face of the sealing ring body (1), the second end face (122) is annular and is obliquely arranged, and the second end face (122) gradually expands outwards along the direction of the peripheral surface sealing boss (12) pointing to the end surface sealing boss (11).

8. The positive and negative pressure seal ring according to claim 7, wherein: the number of the peripheral surface sealing bosses (12) is two, and the two peripheral surface sealing bosses (12) are symmetrically arranged relative to the end surface sealing boss (11).

9. Pipeline connection structure, its characterized in that: the method comprises the following steps:

the positive and negative pressure seal ring of any one of claims 1-8;

the positive and negative pressure sealing ring is arranged in the pipe joint (2);

the pipe fitting (3) extends into the sealing ring body (1), the peripheral surface of the pipe fitting (3) is abutted against the inner side surface of the peripheral surface sealing boss (12), and the end surface of the pipe fitting (3) is abutted against the end surface sealing boss (11);

a locking element which locks the pipe (3) on the pipe connection (2).

10. The pipe connecting structure according to claim 9, wherein: the periphery of the pipe fitting (3) is provided with a limiting flange, the inner wall of the locking piece is provided with a limiting groove, and the limiting flange is limited in the limiting groove.