CN116164103A - Screw plug compression type T-shaped ring sealing device - Google Patents

Abstract

The invention provides a screw plug compression type T-shaped ring sealing device, and relates to the technical field of screw plug sealing equipment. The screw plug compression type T-shaped ring sealing device comprises a pipe box plate, a screw hole is formed in the pipe box plate, a screw plug is spirally connected in the screw hole, and the screw plug compression type T-shaped ring sealing device further comprises a first protruding portion and a T-shaped ring. Be provided with towards the convex first bulge of screw side on the pipe box board of screw department, insert the plug in the pipe box board through the screw from the outside of pipe box board, T type ring is placed between first bulge and plug. Along with the pressure increase in the tube box, the medium in the tube box transmits the pressure to the outer surface of the T-shaped ring close to the center side of the screw hole, so that radial pressure perpendicular to the axial direction of the screw hole is generated, the T-shaped ring, the plug and the first protruding part are compacted, the sealing strength between the plug and the tube box plate is improved, and the sealing strength is higher as the pressure in the tube box is higher, so that leakage is avoided.

Description

Screw plug compression type T-shaped ring sealing device

Technical Field

The invention relates to the technical field of plug sealing equipment, in particular to a plug compression type T-shaped ring sealing device.

Background

In air coolers used in industries such as petroleum, chemical engineering, metallurgy, electric power and the like, plug sealing is a key to sealing a pipe box. The conventional plug seal is that plugs are connected through plug holes in the pipe box plate through threads, and the plugs are attached and sealed with the pipe box plate by gaskets.

However, because the plug is subjected to the pressure in the container perpendicular to the end face of the plug, the plug generates an axial outward force, and the pressure of the plug on the gasket is reduced, so that the degree of adhesion of the sealing surface is reduced, and the sealing capability is reduced to cause leakage.

For this purpose, the above technical problems need to be further solved.

Disclosure of Invention

The embodiment of the invention aims to provide a plug compression type T-shaped ring sealing device so as to improve the sealing strength between a plug and a pipe box plate, and the sealing strength is higher as the pressure in the pipe box is higher, so that leakage is avoided.

In order to solve the technical problems, the embodiment of the invention provides the following technical scheme:

the first aspect of the invention provides a screw plug compression type T-shaped ring sealing device, which comprises a pipe box plate, wherein a screw hole is formed in the pipe box plate, a screw plug is spirally connected in the screw hole, and the device further comprises:

a first projection provided on the tube box plate near the screw hole and projecting toward the screw hole side;

a T-ring disposed between the first projection and the plug and connected to the first projection and the tube box plate and the plug at the same time;

wherein the T-ring also covers an edge of the first projection near a center side of the screw hole.

Further, the first protrusion includes:

a first projection connected to the manifold plate;

a first sealing surface on the first projection near a center side of the screw hole;

and a second sealing surface positioned on the first projecting member adjacent to the plug side.

Further, a second projecting portion is provided near the outer periphery of the end portion of the plug on the second seal surface side, the second projecting portion projecting toward the second seal surface side.

Further, the second protrusion includes:

a second projection;

a third sealing surface located on the second projection adjacent to the second sealing surface and connected to the T-ring;

a fourth sealing surface located on the second projection near the center side of the screw hole and connected to the T-ring;

wherein the T-ring also covers the fourth sealing surface.

Further, a compression cover is arranged between the T-shaped ring and the pipe box plate and between the T-shaped ring and the pipe plug.

Further, the pressing cover includes:

a first pressing portion connected to an end portion of the plug near the second sealing surface side;

the second pressing part is positioned at the end part of the first pressing part and is connected with the first pressing part, and is also connected with the T-shaped ring and the pipe box plate.

Further, the second pressing portion includes:

a pressing member;

a first compression surface on the compression member on a side close to the second sealing surface;

the second compression surface is positioned on the compression piece close to the center side of the screw hole.

Further, the T-ring includes:

a first ring member connected to the second sealing surface and the manifold plate and the first compression surface simultaneously;

and the second ring piece is perpendicular to the first ring piece and is connected with the first sealing surface and the second pressing surface at the same time.

Further, the first ring member includes:

a first ring portion;

a first annular surface provided on the first annular portion on the second seal surface side and connected to the second seal surface;

a second annular surface which is arranged on the first annular part positioned on the side of the pipe box plate and is connected with the pipe box plate;

and the third annular surface is arranged on the first annular part positioned on the side of the first compression surface and is connected with the first compression surface.

Further, the second ring member includes:

the second ring part is vertically connected with the first ring part;

a fourth annular surface which is arranged on the second annular part positioned on the side of the second compression surface and is connected with the second compression surface;

a fifth annulus disposed on the second annulus adjacent the plug side;

a sixth annular surface provided on the second annular portion located near a center side of the screw hole and parallel to the second annular surface;

a seventh annulus disposed on the second annulus on a side remote from the plug;

an eighth ring surface is provided on the second ring portion on a side close to the first sealing surface and connected to the first sealing surface.

Compared with the prior art, the screw plug compression type T-shaped ring sealing device provided by the first aspect of the invention has the advantages that the first protruding part protruding towards the screw hole side is arranged on the pipe box plate near the screw hole, the screw plug is inserted into the pipe box plate from the outside of the pipe box plate through the screw hole, and the T-shaped ring is arranged between the first protruding part and the screw plug. Along with the pressure increase in the tube box, the medium in the tube box transmits the pressure to the outer surface of the T-shaped ring close to the center side of the screw hole, so that radial pressure perpendicular to the axial direction of the screw hole is generated, the T-shaped ring, the plug and the first protruding part are compacted, the sealing strength between the plug and the tube box plate is improved, and the sealing strength is higher as the pressure in the tube box is higher, so that leakage is avoided.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, wherein like or corresponding reference numerals indicate like or corresponding parts, there are shown by way of illustration, and not limitation, several embodiments of the invention, in which:

FIG. 1 schematically illustrates a cross-sectional view of a plug compression T-ring seal;

fig. 2 schematically shows a cross-sectional view of the first projection;

fig. 3 schematically shows a cross-sectional view of the second protrusion;

FIG. 4 schematically illustrates a cross-sectional view of a T-ring;

FIG. 5 schematically illustrates a cross-sectional view of another thread plug compression T-ring seal;

fig. 6 schematically shows a cross-sectional view of the compression cover;

reference numerals illustrate:

1. a tube box plate;

2. a screw hole;

3. plugging; 31. a second projection; 311. a second projection; 312. a third sealing surface; 313. a fourth sealing surface;

4. a first projection; 41. a first projection; 411. a first sealing surface; 412. a second sealing surface;

5. a T-ring; 51. a first ring portion; 511. a first annulus; 512. a second annulus; 513. a third annulus; 52. a second ring portion; 521. a fourth annulus; 522. a fifth annulus; 523. a sixth annulus; 524. a seventh torus; 525. an eighth torus;

6. a pressing cover; 61. a first pressing portion; 62. a second pressing part; 621. a first compression surface; 622. and a second compression surface.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. Relational terms such as "first" and "second", and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "coupled," "connected," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly via an intermediary. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The embodiment of the invention provides a sealing device for a screw plug 3 compression type T-shaped ring 5, which is shown in fig. 1, wherein the sealing device for the screw plug 3 compression type T-shaped ring 5 comprises a pipe box plate 1, a screw hole 2 is arranged on the pipe box plate 1, the screw plug 3 is spirally connected in the screw hole 2, and the sealing device also comprises a first protruding part 4 and a T-shaped ring 5. The first projecting portion 4 is provided on the tube box plate 1 near the screw hole 2, and projects toward the screw hole 2 side. A T-ring 5 is provided between the first projecting portion 4 and the plug 3 and is connected to the first projecting portion 4 and the tube box plate 1 and the plug 3 at the same time. Wherein the T-ring 5 also covers the edge of the first projection 4 near the central side of the screw hole 2.

In the present embodiment, a first projecting portion 4 projecting toward the screw hole 2 side is provided on the tube box plate 1 near the screw hole 2, and a plug 3 is inserted into the tube box plate 1 from the outside of the tube box plate 1 through the screw hole 2, with a T-ring 5 placed between the first projecting portion 4 and the plug 3. Along with the pressure rise in the tube box, the medium in the tube box transmits the pressure to the outer surface of the T-shaped ring 5 close to the center side of the screw hole 2, so that radial pressure perpendicular to the axial direction of the screw hole 2 is generated, the T-shaped ring 5, the plug 3 and the first protruding part 4 are compacted, the sealing strength between the plug 3 and the tube box plate 1 on the tube box is improved, and the sealing strength is increased as the pressure in the tube box is increased, so that leakage is avoided.

In a specific embodiment, as shown in fig. 2, the first projection 4 includes a first projection 41, a first sealing surface 411, and a second sealing surface 412. The first projection 41 is connected to the manifold plate 1. The first sealing surface 411 is located on the first projecting piece 41 near the center side of the screw hole 2. The second sealing surface 412 is located on the first projecting member 41 on the side close to the plug 3.

In this embodiment, the first sealing surface 411 and the second sealing surface 412 on the first protruding member 41 are connected with the T-shaped ring 5 at the same time, and as the pressure inside the tube box increases, the medium in the tube box transfers the pressure to the outer surface of the T-shaped ring 5 near the center side of the screw hole 2, generating a radial pressure perpendicular to the axial direction of the screw hole 2, so that the T-shaped ring 5 is tightly pressed and compacted with the first sealing surface 411 and the second sealing surface 412, thereby improving the sealing strength between the plug 3 and the tube box plate 1 on the tube box.

Illustratively, the angle between the first sealing surface 411 and the second sealing surface 412 is 210 ° to 270 °.

For example, the first sealing surface 411 may also be perpendicular to the second sealing surface 412, depending on the application.

Further, the first sealing surface 411 encloses a process hole for the flow of the medium in the tube box, so that the medium transmits pressure to the outer surface of the T-ring 5 near the center side of the screw hole 2, creating a radial pressure perpendicular to the axial direction of the screw hole 2.

In the specific embodiment, as shown in fig. 3, the outer periphery of the end of the plug 3 near the second sealing surface 412 side is provided with the second projecting portion 31, and the second projecting portion 31 projects toward the second sealing surface 412 side.

In this embodiment, the second protrusion 31 protruding toward the second sealing surface 412 is advantageous to be connected with the T-ring 5, and as the pressure inside the tube box increases, the medium in the tube box transfers the pressure to the outer surface of the T-ring 5 near the center side of the screw hole 2, generating a radial pressure perpendicular to the axial direction of the screw hole 2, so that compression compaction is achieved between the T-ring 5 and the second protrusion 31, thereby improving the sealing strength between the plug 3 and the tube box plate 1 on the tube box.

In a particular embodiment, as shown in fig. 3, the second projection 31 includes a second projection 311, a third sealing surface 312, and a fourth sealing surface 313. The third sealing surface 312 is located on the second projection 311 on the side close to the second sealing surface 412 and is connected to the T-ring 5. A fourth sealing surface 313 is provided on the second projection 311 near the center side of the screw hole 2 and is connected to the T-ring 5. Wherein the T-ring 5 also covers the fourth sealing surface 313.

In the present embodiment, the third sealing surface 312 and the fourth sealing surface 313 on the second protruding member 311 are simultaneously connected with the T-ring 5, and the T-ring 5 also covers the edge of the fourth sealing surface 313. As the pressure inside the tube box increases, the medium in the tube box transmits the pressure to the outer surface of the T-ring 5 near the center side of the screw hole 2, generating a radial pressure perpendicular to the axial direction of the screw hole 2, so that compaction is achieved between the T-ring 5 and the third sealing surface 312 and the fourth sealing surface 313, thereby improving the sealing strength between the plug 3 and the tube box plate 1 on the tube box.

Further, the third sealing surface 312 is connected with the third annular surface 513 on the T-shaped ring 5, and the fourth sealing surface 313 is connected with the fourth annular surface 521 on the T-shaped ring 5, so that compaction is realized between the third sealing surface 312 and the third annular surface 513, and the sealing strength between the plug 3 and the pipe box plate 1 on the pipe box is improved.

Illustratively, the angle between third annular surface 513 and fourth annular surface 521 is 90, and the angle between first compression surface 621 and second compression surface 622 is also 90.

For example, according to different applications, the angle between the third annular surface 513 and the fourth annular surface 521 may be 1 ° to 30 °, the angle between the first compression surface 621 and the second compression surface 622 may be 1 ° to 30 °, and the angle between the first compression surface 621 and the second compression surface 622 may be the same as the angle between the third annular surface 513 and the fourth annular surface 521.

In the specific embodiment, as shown in fig. 5, a compression cover 6 is also arranged between the T-shaped ring 5 and the pipe box plate 1 and the plug 3.

In the present embodiment, when the second protrusion 31 is not provided on the plug 3, the pressing cover 6 is provided between the T-ring 5 and the box plate 1 and the plug 3. On one hand, the compression cover 6 is connected with the T-shaped ring 5, so that the sealing strength between the plug 3 and the pipe box plate 1 on the pipe box is improved; on the other hand, in order to realize the sealing effect between the plug 3 and the pipe box plate 1, the plug 3 in the prior art is made of expensive rare metal materials, and the compression cover 6 occupies part of the area of the plug 3 in the space of the screw hole 2 with the target size, so that the volume of the plug 3 is reduced. And further, on the basis of improving the sealing strength between the plug 3 and the pipe box plate 1 on the pipe box, the production cost and the use cost of the plug 3 are greatly reduced.

In a specific embodiment, as shown in fig. 6, the pressing cover 6 includes a first pressing portion 61 and a second pressing portion 62. The first pressing portion 61 is connected to an end of the plug 3 on the side close to the second sealing surface 412. The second pressing part 62 is located at an end of the first pressing part 61 and is connected to the first pressing part 61 while being connected to the T-ring 5 and the tube box plate 1.

In the present embodiment, the first compression portion 61 is connected to the plug 3, the second compression portion 62 is connected to the tube box plate 1, the plug 3 is isolated from the interior of the tube box by the first compression portion 61 and the second compression portion 62, and the T-ring 5 is directly connected to the second compression portion 62, the tube box plate 1, and the first sealing surface 411. The medium in the pipe box transmits pressure to the outer surface of the T-shaped ring 5 near the center side of the screw hole 2, and radial pressure perpendicular to the axial direction of the screw hole 2 is generated, so that the T-shaped ring 5, the second pressing part 62, the pipe box plate 1 and the first sealing surface 411 are pressed and compacted, and the sealing strength between the plug 3 and the pipe box plate 1 on the pipe box is improved.

In a specific embodiment, as shown in fig. 6, the second pressing portion 62 includes a pressing member, a first pressing surface 621, and a second pressing surface 622. The first pressing surface 621 is located on the pressing member on the side close to the second sealing surface 412. The second pressing surface 622 is located on the pressing member near the center side of the screw hole 2.

In this embodiment, the first compression surface 621 and the second compression surface 622 are simultaneously connected with the T-shaped ring 5, and the medium in the box transmits pressure to the outer surface of the T-shaped ring 5 near the center side of the screw hole 2, so that radial pressure perpendicular to the axial direction of the screw hole 2 is generated, and compression compaction is realized between the T-shaped ring 5 and the first compression surface 621 and the second compression surface 622, so that the sealing strength between the plug 3 and the pipe box plate 1 on the pipe box is improved.

In a particular embodiment, as shown in fig. 4, the T-ring 5 comprises a first ring member and a second ring member. The first ring member is connected to the second sealing surface 412 and the tube box plate 1 and the first compression surface 621 at the same time. The second ring member is perpendicular to the first ring member and is connected to both the first sealing surface 411 and the second compression surface 622.

In the present embodiment, the first ring member is connected to the second ring member, and the first ring member is simultaneously connected to the second sealing surface 412 and the tube box plate 1 and the first compression surface 621, and the second ring member is simultaneously connected to the first sealing surface 411 and the second compression surface 622, so that when the medium in the tube box transmits pressure to the outer surface of the T-ring 5 near the center side of the screw hole 2, a radial pressure perpendicular to the axial direction of the screw hole 2 is generated, so that compression compaction is achieved between the first ring member and the first compression surface 621, the tube box plate 1, the second sealing surface 412, and between the second ring member and the second compression surface 622 and the first sealing surface 411, thereby improving the sealing strength between the plug 3 and the tube box plate 1 on the tube box.

In a particular embodiment, as shown in fig. 4, the first ring member includes a first ring portion 51, a first ring surface 511, a second ring surface 512, and a third ring surface 513. The first annular surface 511 is provided on the first annular portion 51 on the second sealing surface 412 side, and is connected to the second sealing surface 412. The second annular surface 512 is provided on the first annular portion 51 on the tube box plate 1 side, and is connected to the tube box plate 1. The third annular surface 513 is provided on the first annular portion 51 on the side of the first compression surface 621, and is connected to the first compression surface 621.

In this embodiment, the first annular surface 511 is connected to the second sealing surface 412, the second annular surface 512 is connected to the tube box plate 1, and the third annular surface 513 is connected to the first compression surface 621, so that compression and compaction are achieved between the first annular member and the second compression portion 62, and between the tube box plate 1 and the first protrusion portion 4, and sealing strength between the plug 3 and the tube box plate 1 on the tube box is improved.

In a particular embodiment, as shown in fig. 4, the second ring member includes a second ring portion 52, a fourth ring surface 521, a fifth ring surface 522, a sixth ring surface 523, a seventh ring surface 524, and an eighth ring surface 525. The second ring portion 52 is connected perpendicularly to the first ring portion 51. The fourth annular surface 521 is disposed on the second annular portion 52 on the second pressing surface 622 side and is connected to the second pressing surface 622. A fifth annulus 522 is provided on the second annulus 52 on the side closer to the plug 3. The sixth annular surface 523 is provided on the second annular portion 52 located near the center side of the screw hole 2 and parallel to the second annular surface 512. A seventh annulus 524 is provided on the second ring portion 52 on the side remote from the plug 3. An eighth annular surface 525 is provided on the second annular portion 52 on the side close to the first sealing surface 411, and is connected to the first sealing surface 411.

In this embodiment, the fourth annular surface 521 is connected to the second compression surface 622, the eighth annular surface 525 is connected to the first sealing surface 411, and the sixth annular surface 523 is directly contacted to the medium in the pipe box, so that compression and compaction are achieved between the second annular member and the second compression portion 62 and the first protrusion portion 4, thereby improving the sealing strength between the plug 3 and the pipe box plate 1 on the pipe box.

In the invention, the plug is inserted into the pipe box plate through the screw hole, so that the primary sealing is realized. When the first ring surface is connected with the second sealing surface, the second ring surface is connected with the pipe box plate, the third ring surface is connected with the first pressing surface, the fourth ring surface is connected with the second pressing surface, and the eighth ring surface is connected with the first sealing surface, the secondary sealing is realized.

In the invention, in order to further improve the sealing performance, reduce the machining precision requirements of each sealing surface, each annular surface and each compression surface and avoid occlusion, the surfaces of the T-shaped rings are sequentially coated with a silver coating and a MoS2 coating. And the medium is isolated from the screw thread on the screw plug and the screw thread on the pipe box plate, so that leakage caused by screw corrosion on the screw plug and the pipe box plate is avoided, and meanwhile, the screw plug corrosion is prevented from being difficult to disassemble.

The invention avoids the problems that the pressure between the plug and the gasket is reduced due to the fact that the pressure in the existing pressure container directly acts on the end face of the plug and the gasket, and the sealing structure of the existing plug gasket is influenced by the cyclic stress generated by the change of the pressure and the temperature in the pressure container to cause fatigue and looseness and leakage. The solution according to the invention is thus quite different from prior art thread tightening forces in which the sealing pressure comes from the plug.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a plug compresses tightly formula T type ring sealing device, includes the pipe case board, be provided with the screw on the pipe case board, screwed connection has the plug in the screw, its characterized in that still includes:

a first projection provided on the tube box plate near the screw hole and projecting toward the screw hole side;

a T-ring disposed between the first projection and the plug and connected to the first projection and the tube box plate and the plug at the same time;

wherein the T-ring also covers an edge of the first projection near a center side of the screw hole.

2. The plug compression T-ring seal of claim 1, wherein said first projection comprises:

a first projection connected to the manifold plate;

a first sealing surface on the first projection near a center side of the screw hole;

and a second sealing surface positioned on the first projecting member adjacent to the plug side.

3. The plug compression type T-ring seal of claim 2, wherein a second protrusion is provided on an outer periphery of an end of said plug near said second seal face side, said second protrusion protruding toward said second seal face side.

4. A plug compression T-ring seal as in claim 3 wherein said second projection comprises:

a second projection;

a third sealing surface located on the second projection adjacent to the second sealing surface and connected to the T-ring;

a fourth sealing surface located on the second projection near the center side of the screw hole and connected to the T-ring;

wherein the T-ring also covers the fourth sealing surface.

5. The plug compression T-ring seal of claim 2, wherein a compression cap is further disposed between said T-ring and said tube box plate and said plug.

6. The plug compression T-ring seal of claim 5, wherein said compression cap comprises:

a first pressing portion connected to an end portion of the plug near the second sealing surface side;

the second pressing part is positioned at the end part of the first pressing part and is connected with the first pressing part, and is also connected with the T-shaped ring and the pipe box plate.

7. The plug compression T-ring seal of claim 6, wherein said second compression portion comprises:

a pressing member;

a first compression surface on the compression member on a side close to the second sealing surface;

the second compression surface is positioned on the compression piece close to the center side of the screw hole.

8. The plug compression T-ring seal of claim 7, wherein said T-ring comprises:

a first ring member connected to the second sealing surface and the manifold plate and the first compression surface simultaneously;

and the second ring piece is perpendicular to the first ring piece and is connected with the first sealing surface and the second pressing surface at the same time.

9. The plug compression T-ring seal of claim 8, wherein said first ring member comprises:

a first ring portion;

a first annular surface provided on the first annular portion on the second seal surface side and connected to the second seal surface;

a second annular surface which is arranged on the first annular part positioned on the side of the pipe box plate and is connected with the pipe box plate;

and the third annular surface is arranged on the first annular part positioned on the side of the first compression surface and is connected with the first compression surface.

10. The plug compression T-ring seal of claim 9, wherein said second ring member comprises:

the second ring part is vertically connected with the first ring part;

a fourth annular surface which is arranged on the second annular part positioned on the side of the second compression surface and is connected with the second compression surface;

a fifth annulus disposed on the second annulus adjacent the plug side;

a sixth annular surface provided on the second annular portion located near a center side of the screw hole and parallel to the second annular surface;

a seventh annulus disposed on the second annulus on a side remote from the plug;

an eighth ring surface is provided on the second ring portion on a side close to the first sealing surface and connected to the first sealing surface.

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