CN112524374B

CN112524374B - Composite sealing device

Info

Publication number: CN112524374B
Application number: CN202011448961.0A
Authority: CN
Inventors: 程锐; 范海涛; 许淑峰; 朱麟杰; 许洋; 宋小海; 易洁锋; 生祥; 毛冠煜; 黄河
Original assignee: Diamond Energy Technology Shanghai Co ltd
Current assignee: Diamond Energy Technology Shanghai Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-10-15
Anticipated expiration: 2040-12-09
Also published as: CN112524374A

Abstract

The invention belongs to the technical field of hydraulic quick-plug sealing, and discloses a composite sealing device which comprises a sleeve, a metal support ring and two sealing components, wherein the two ends of the sleeve are respectively a sleeve top end and a sleeve bottom end; the metal support ring is sleeved on the sleeve; the sleeve is all located to two seal assembly covers, two seal assembly are located metal support ring's both sides and set up about metal support ring symmetry, seal assembly includes nonmetal inner seal circle and metal skeleton, the sleeve is located to nonmetal inner seal circle cover, nonmetal inner seal circle is located to metal skeleton cover, nonmetal inner seal circle and metal skeleton of every seal assembly laminate in a side of metal support ring, under non-sealing state, section of thick bamboo top protrusion in seal assembly's top surface, under sealing state, section of thick bamboo top and seal assembly's top surface all laminates in the wall of socket. The composite sealing device can improve the butt joint sealing performance and the plugging service life.

Description

Composite sealing device

Technical Field

The invention belongs to the technical field of hydraulic quick-insertion sealing, and particularly relates to a composite sealing device.

Background

In subsea production systems, a hydraulic power source is often required during operation of the subsea production facility. In actual operation, such hydraulic power sources often require an external hydraulic quick plug to provide. For medium-pressure (not more than 3000psi) hydraulic pressure quick plug, the butt joint seal of socket and plug generally adopts the nonmetal seal commonly used, can effectively realize and can guarantee the life of many times plug. However, for high-pressure (not less than 3000psi) and ultrahigh-pressure (not less than 4500psi) hydraulic quick plugging, the butt joint sealing of the socket and the plug adopts common non-metal sealing, the reliability is very low, the non-metal sealing is easy to burst, and the service life of plugging is short.

Therefore, a composite sealing device is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a composite sealing device which can meet the requirements of high butt sealing performance and plugging service life of a plug and a socket for high-pressure hydraulic quick plugging.

In order to achieve the purpose, the invention adopts the following technical scheme:

a composite sealing device comprising:

the socket comprises a socket body, a sleeve and a plug, wherein the socket body is provided with a socket hole, the socket hole is formed in the socket body, and the plug hole is formed in the socket body;

the metal support ring is sleeved on the sleeve;

two sealing components are sleeved on the sleeve, the two sealing components are respectively a first sealing component arranged close to the top end of the sleeve and a second sealing component arranged close to the bottom end of the sleeve, the two sealing components are positioned at two sides of the metal support ring and are symmetrically arranged around the metal support ring, the sealing component comprises a nonmetal inner sealing ring and a metal framework, the nonmetal inner sealing ring is sleeved on the sleeve, the metal framework is sleeved on the nonmetal inner sealing ring, the nonmetal inner sealing ring and the metal framework of each sealing component are attached to one side surface of the metal support ring, under the non-sealing state, the top end of the cylinder protrudes out of the top surface of the first sealing component, and under the sealing state, the top end of the cylinder and the top surface of the first sealing component are attached to the wall surface of the socket.

Preferably, the sealing assembly further comprises a nonmetal outer sealing ring, the nonmetal outer sealing ring is sleeved on the metal framework, and the nonmetal outer sealing rings of the two sealing assemblies are respectively attached to two side faces of the metal support ring.

Preferably, the first sealing assembly is a dynamic sealing assembly, the second sealing assembly is a static sealing assembly, and in the non-sealing state, the top surfaces of the non-metal outer sealing ring and the non-metal inner sealing ring of the dynamic sealing assembly protrude out of the top surface of the metal framework, and the top end of the cylinder protrudes out of the top surfaces of the non-metal outer sealing ring and the non-metal inner sealing ring.

Preferably, the non-metal inner seal ring comprises a first lip and a second lip connected with the first lip, the side surface of the first lip is attached to the metal framework, the second lip is attached to the metal support ring, and the end part of the first lip of the non-metal inner seal ring of the dynamic seal assembly is attached to the outer side surface of the top end of the cylinder;

the nonmetal outer seal ring comprises a third lip and a fourth lip connected with the third lip, the side face of the third lip is attached to the metal framework, and the fourth lip is attached to the metal support ring.

Preferably, the metal framework comprises a top part and two supporting parts connected to the same side of the top part, a limiting groove is formed between the two supporting parts at intervals, convex ridges are arranged on two side surfaces of the metal support ring, and the two convex ridges are respectively inserted into the limiting grooves of the two metal frameworks.

Preferably, concave surfaces are arranged on the side surfaces of the metal support ring and on two sides of the raised ridge, and the two support parts of the metal framework are respectively abutted to the two concave surfaces corresponding to the same raised ridge.

Preferably, the metal support ring is a herringbone involutory disc spring, the herringbone involutory disc spring comprises a first involutory part and a second involutory part, one sides of the first involutory part and the second involutory part, which are far away from the sleeve, are fixedly connected, and one sides, which face the sleeve, are spaced from each other.

Preferably, the plane where the fixed connection positions of the first counter part and the second counter part are located is a reference plane, and the two sealing assemblies are symmetrical relative to the reference plane.

Preferably, the sleeve comprises a cylinder body and a flange end, a step surface is arranged at the joint of the flange end and the cylinder body, the flange end is the top end of the cylinder, the end part of the first butt joint piece abuts against the step surface, and the end part of the second butt joint piece protrudes out of the bottom end of the cylinder.

Preferably, the first coupling member includes a first symmetric segment and a first asymmetric segment connected to an inner side of the first symmetric segment, the second coupling member includes a second symmetric segment and a second asymmetric segment connected to an inner side of the second symmetric segment, outer sides of the first symmetric segment and the second symmetric segment are fixedly connected, the first symmetric segment and the second symmetric segment are symmetric with respect to the reference surface, the first asymmetric segment and the second asymmetric segment are spaced from each other and have a cylindrical surface, the first asymmetric segment abuts against the stepped surface, and a sum of a length of the first asymmetric segment and a length of the flange end is equal to a length of the second asymmetric segment in an axial direction of the sleeve.

The invention has the beneficial effects that:

the invention provides a composite sealing device, wherein a sleeve realizes the communication between a socket and a plug, and a metal framework of a sealing assembly is mainly sealed, so that the high-pressure sealing performance is ensured; the non-metallic inner sealing ring of the sealing assembly ensures initial auxiliary pre-sealing; a metal support ring is arranged between the two sealing components, so that the integral supporting function is realized; and the top end of the sleeve barrel protrudes out of the end face of the sealing assembly, so that the top end of the sleeve barrel is abutted against the socket, the friction force in the butt joint process of the socket and the plug is mainly born, and the plugging and sealing life of the sealing assembly is prolonged. The composite sealing device provided by the invention can meet the requirements of high butt sealing performance and plugging service life on the plug and the socket by high-pressure hydraulic quick plugging.

Drawings

FIG. 1 is a cross-sectional view of a prior art hydraulic quick-connect plug and socket shown separated;

FIG. 2 is a cross-sectional view of a composite sealing device according to an embodiment of the invention sealing a plug and a receptacle in mutual engagement;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a cross-sectional view of a composite seal provided by an embodiment of the present invention in an unsealed condition;

FIG. 5 is a partial cross-sectional view of a composite seal provided by an embodiment of the present invention.

In the figure:

100. a plug; 200. a socket;

1. a sleeve; 2. a metal support ring; 3. a seal assembly;

11. a flange end; 21. a first mating member; 22. a second mating member; 23. a raised ridge; 24. a concave surface; 31. a non-metallic inner seal ring; 32. a metal skeleton; 33. a non-metallic outer seal ring;

211. a first symmetrical section; 212. a first asymmetric segment; 221. a second symmetrical section; 222. a second asymmetric segment; 311. a first lip; 312. a second lip; 321. a top portion; 322. a support portion; 323. a limiting groove; 331. a third lip; 332. a fourth lip.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., as meaning both connected and disconnectable, mechanically and electrically, directly or indirectly via intermediate media, whether internal or external to the elements, or in any other relationship between the elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The embodiment provides a composite sealing device which can be mounted on a hydraulic quick-plug 100 shown in fig. 1 and 2, and after the hydraulic quick-plug 100 is plugged with a socket 200, a hydraulic circuit is guaranteed to be smooth and sealed.

As shown in fig. 3 to 5, the composite sealing device provided in this embodiment includes a sleeve 1, a metal support ring 2, and two sealing assemblies 3, where two ends of the sleeve 1 are a top end and a bottom end, respectively, the top end of the sleeve is used for communicating with a flow port of the socket 200, and the bottom end of the sleeve is used for communicating with a flow port of the plug 100; the metal support ring 2 is sleeved on the sleeve 1; sleeve 1 is all located to two seal assembly 3 covers, two seal assembly 3 are respectively for being close to the first seal assembly that a section of thick bamboo top set up and the second seal assembly that is close to a section of thick bamboo bottom and sets up, two seal assembly 3 are located the both sides of metal-support ring 2 and set up about metal-support ring 2 symmetry, seal assembly 3 includes nonmetal inner seal circle 31 and metal skeleton 32, sleeve 1 is located to nonmetal inner seal circle 31 cover, nonmetal inner seal circle 31 is located to metal skeleton 32 cover, nonmetal inner seal circle 31 and the metal skeleton 32 of every seal assembly 3 laminate in a side of metal-support ring 2, under non-sealing state, section of thick bamboo top protrusion in first seal assembly's top surface, under sealing state, section of thick bamboo top and first seal assembly's top surface all laminates in the wall that communicates socket 200.

In the composite sealing device provided by the embodiment, the sleeve 1 realizes the communication between the socket 200 and the plug 100, and the metal framework 32 of the sealing component 3 is used as a main seal, so that the high-pressure sealing performance is ensured; the non-metallic inner seal ring 31 of the seal assembly 3 ensures initial secondary pre-sealing; a metal support ring 2 is arranged between the two sealing components 3, so that the integral supporting function is realized; and the cylinder top of the sleeve 1 protrudes out of the end face of the sealing component 3, so that the cylinder top of the sleeve 1 is abutted against the socket 200, the friction force in the butt joint process of the socket 200 and the plug 100 is mainly born, and the plugging and sealing life of the sealing component 3 is prolonged. The composite sealing device provided by the embodiment can meet the requirements of high butt sealing performance and plugging service life on the plug 100 and the socket 200 by high-pressure hydraulic quick plugging.

Specifically, the sealing assemblies 3 further include a non-metal outer sealing ring 33, the non-metal outer sealing ring 33 is sleeved on the metal framework 32, and the non-metal outer sealing rings 33 of the two sealing assemblies 3 are respectively attached to two side surfaces of the metal support ring 2. The inner side and the outer side of the metal framework 32 are respectively provided with the non-metal inner sealing ring 31 and the non-metal outer sealing ring 33, so that the sealing property is further improved.

Specifically, the first sealing assembly is a dynamic sealing assembly, the second sealing assembly is a static sealing assembly, and in a non-sealing state, the top surfaces of the non-metal outer sealing ring 33 and the non-metal inner sealing ring 31 of the dynamic sealing assembly protrude out of the top surface of the metal framework 32, and the top end of the sleeve 1 protrudes out of the top surfaces of the non-metal outer sealing ring 33 and the non-metal inner sealing ring 31. Because the non-metal outer sealing ring 33 and the non-metal inner sealing ring 31 have certain elasticity, the part protruding out of the metal framework 32 is extruded to deform, and the wall surface of the socket 200 is tightly attached to realize sealing; the top end of the sleeve 1 protrudes from the top surfaces of the non-metal outer sealing ring 33 and the non-metal inner sealing ring 31, that is, the top end of the sleeve protrudes from the whole sealing assembly 3, and bears the friction force in the butt joint process of the socket 200 and the plug 100.

Specifically, the non-metal inner seal ring 31 comprises a first lip 311 and a second lip 312 connected with the first lip 311, the side surface of the first lip 311 is attached to the metal framework 32, the second lip 312 is attached to the metal support ring 2, and the end part of the first lip 311 of the non-metal inner seal ring 31 of the dynamic seal assembly is attached to the outer side surface of the top end of the cylinder; the non-metal outer sealing ring 33 comprises a third lip 331 and a fourth lip 332 connected with the third lip 331, the side face of the third lip 331 is attached to the metal framework 32, and the fourth lip 332 is attached to the metal support ring 2. As shown in fig. 4, the side surfaces of the first lip portion 311 and the third lip portion 331 are completely attached to the two side walls of the metal framework 32, so that the supporting capability of the non-metal inner seal ring 31 and the non-metal outer seal ring 33 for bearing external pressure is ensured. The second, third and

fourth lips

312, 331 and 332 enable a tight fit of the seal assembly 3 and the metal support ring 2; the first lip 311 provides a tight fit between the seal assembly 3 and the sleeve 1, ensuring a seal.

More specifically, the metal framework 32 includes a top portion 321 and two supporting portions 322 connected to the same side of the top portion 321, a spacing groove 323 is formed between the two supporting portions 322, two side surfaces of the metal support ring 2 are both provided with a convex ridge 23, and the two convex ridges 23 are respectively inserted into the spacing grooves 323 of the two metal frameworks 32. The convex ridge 23 and the limiting groove 323 are matched to ensure that the metal framework 32 keeps stable in structure in the process of plugging and unplugging, and the high-pressure sealing capability is ensured. In the present embodiment, the radial cross section of the metal framework 32 is an axisymmetrical pattern, and the cross sections of the non-metal inner seal ring 31 and the non-metal outer seal ring 33 on both sides of the metal framework are symmetric with respect to the symmetry axis of the cross section of the metal framework 32.

Optionally, concave surfaces 24 are disposed on both sides of the ridge 23 on the side surface of the metal support ring 2, and the two supporting portions 322 of the metal framework 32 abut against the two concave surfaces 24 corresponding to the same ridge 23 respectively. The cooperation of the concave surface 24 and the support 322 further improves the sealing performance. In this embodiment, the end of the supporting portion 322 is an arc-shaped convex surface, the concave surface 24 is an arc-shaped concave surface, and the arc-shaped convex surface is attached to the arc-shaped concave surface, so that the metal support ring 2 and the metal framework 32 are in sealing abutment.

Specifically, the metal support ring 2 is a herringbone involution disc spring, the herringbone involution disc spring comprises a first involution part 21 and a second involution part 22, one sides of the first involution part 21 and the second involution part 22, which are far away from the sleeve 1, are fixedly connected, and one sides, which are far towards the sleeve 1, are spaced from each other. In the process of plugging, the socket 200 presses the dynamic seal component, so that the dynamic seal component moves towards the static seal component, the spaced ends of the first mating member 21 and the second mating member 22 are compressed to be close to each other, and the elastic force of the first mating member 21 and the second mating member 22 enables the dynamic seal component and the static seal component to be respectively attached to the socket 200 and the plug 100, thereby further ensuring the sealing performance of the composite sealing device.

Optionally, the plane where the first counter element 21 and the second counter element 22 are fixedly connected is a reference plane, and the two sealing assemblies 3 are symmetrical about the reference plane. This arrangement ensures consistent sealing performance of the dynamic and static seal assemblies.

Specifically, the sleeve 1 includes a barrel and a flange end 11, a joint of the flange end 11 and the barrel has a step surface, the flange end 11 is a barrel top end, an end of the first mating member 21 abuts against the step surface, and an end of the second mating member 22 protrudes out of the barrel bottom end. In the plugging process, the flange end 11 is abutted against the socket 200, and the end part of the second mating member 22 is abutted against the plug 100, so that the sleeve 1 and the herringbone mating disc spring are stressed firstly, the stress on the sealing component 3 is less than one third of the stress on the herringbone mating disc spring, the high sealing performance is ensured, the friction force on the sealing component 3 is reduced, and the plugging and unplugging life of the sealing component 3 is greatly prolonged.

Optionally, the outer side surface of the flange end 11 is a conical surface, one end of the conical surface facing the cylinder is a small-diameter end, the other end of the conical surface is a large-diameter end, and the end of the first lip 311 of the dynamic seal assembly is attached to the conical surface, so that not only is the sealing effect achieved, but also when the flange end 11 moves downwards to apply an inclined downward force to the first lip 311, so that the first lip 311 and the first lip move downwards simultaneously to avoid mutual dislocation and separation.

As shown in fig. 4 and 5, the first coupling member 21 includes a first symmetric segment 211 and a first asymmetric segment 212 connected to the inner side of the first symmetric segment 211, the second coupling member 22 includes a second symmetric segment 221 and a second asymmetric segment 222 connected to the inner side of the second symmetric segment 221, the outer sides of the first symmetric segment 211 and the second symmetric segment 221 are fixedly connected, the first symmetric segment 211 and the second symmetric segment 221 are symmetric with respect to a reference plane, the first asymmetric segment 212 and the second asymmetric segment 222 are spaced from each other and have a cylindrical surface, the first asymmetric segment 212 abuts against a step surface, and the sum of the length of the first asymmetric segment 212 and the length of the flange end 11 is equal to the length of the second asymmetric segment 222 in the axial direction of the sleeve 1. The arrangement ensures that the upper part and the lower part of the herringbone involutory disc spring are stressed uniformly, and the sealing components 3 positioned at the two sides of the herringbone involutory disc spring are stressed uniformly, thereby being beneficial to prolonging the service life. In this embodiment, the ridge 23 on one side of the metal support ring 2 is located at the middle position of the first symmetric section 211, the ridge 23 on the other side of the metal support ring 2 is located at the middle position of the second symmetric section 221, and the arc-shaped concave surfaces are also arranged on the first symmetric section 211 and the second symmetric section 221.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A composite sealing device, comprising:

the socket comprises a sleeve (1), wherein two ends of the sleeve are respectively a sleeve top end and a sleeve bottom end, the sleeve top end is used for being communicated with a circulation port of a socket (200), and the sleeve bottom end is used for being communicated with a circulation port of a plug (100);

the metal support ring (2) is sleeved on the sleeve (1);

the sleeve (1) is sleeved with two sealing components (3), the two sealing components (3) are respectively close to a first sealing component arranged at the top end of the sleeve and a second sealing component arranged at the bottom end of the sleeve, the two sealing components (3) are positioned at two sides of the metal support ring (2) and are symmetrically arranged relative to the metal support ring (2), each sealing component (3) comprises a non-metal inner sealing ring (31) and a metal framework (32), the non-metal inner sealing ring (31) is sleeved on the sleeve (1), the metal framework (32) is sleeved on the non-metal inner sealing ring (31), the non-metal inner sealing ring (31) and the metal framework (32) of each sealing component (3) are laminated on one side surface of the metal support ring (2), and the top end of the sleeve protrudes out of the top surface of the first sealing component in a non-sealing state, in a sealed state, the top end of the cartridge and the top surface of the first seal assembly are both attached to the wall surface of the receptacle (200).

2. The composite sealing device according to claim 1, wherein the sealing assembly (3) further comprises a non-metal outer sealing ring (33), the non-metal outer sealing ring (33) is sleeved on the metal framework (32), and the non-metal outer sealing rings (33) of the two sealing assemblies (3) are respectively attached to two side surfaces of the metal support ring (2).

3. The compound sealing device according to claim 2, wherein the first sealing assembly is a dynamic sealing assembly, the second sealing assembly (3) is a static sealing assembly, and in the non-sealing state, top surfaces of the non-metal outer sealing ring (33) and the non-metal inner sealing ring (31) of the dynamic sealing assembly protrude out of a top surface of the metal framework (32), and the top end of the cylinder protrudes out of top surfaces of the non-metal outer sealing ring (33) and the non-metal inner sealing ring (31).

4. A composite sealing device according to claim 3, characterized in that the non-metallic inner seal ring (31) comprises a first lip (311) and a second lip (312) connected to the first lip (311), the side of the first lip (311) is attached to the metal skeleton (32), the second lip (312) is attached to the metal support ring (2), and the end of the first lip (311) of the non-metallic inner seal ring (31) of the dynamic seal assembly is attached to the outer side of the cartridge top end;

the nonmetal outer sealing ring (33) comprises a third lip (331) and a fourth lip (332) connected with the third lip (331), the side face of the third lip (331) is attached to the metal framework (32), and the fourth lip (332) is attached to the metal support ring (2).

5. The composite sealing device according to claim 1, wherein the metal framework (32) comprises a top portion (321) and two supporting portions (322) connected to the same side of the top portion (321), a spacing between the two supporting portions (322) forms a limiting groove (323), two side surfaces of the metal support ring (2) are provided with raised ridges (23), and the two raised ridges (23) are respectively inserted into the limiting grooves (323) of the two metal frameworks (32).

6. Compound sealing device according to claim 5, characterized in that the metal support ring (2) is provided on its side with concave faces (24) on both sides of the ridge (23), the two supports (322) of the metal skeleton (32) abutting against the two corresponding concave faces (24) of the same ridge (23), respectively.

7. A composite sealing device according to any one of claims 1 to 6, characterized in that the metal supporting ring (2) is a herringbone folding belleville spring comprising a first (21) and a second (22) pair of elements, the sides of the first (21) and second (22) pair of elements facing away from the sleeve (1) being affixed to each other and the sides facing the sleeve (1) being spaced from each other.

8. Compound sealing device according to claim 7, characterized in that the plane of the fastening position of the first counter element (21) and the second counter element (22) is a reference plane about which the two sealing components (3) are symmetrical.

9. The compound sealing device according to claim 8, characterized in that the sleeve (1) comprises a cylinder body and a flange end (11), the flange end (11) and the cylinder body are connected to form a step surface, the flange end (11) is the top end of the cylinder, the end of the first counter element (21) abuts against the step surface, and the end of the second counter element (22) protrudes from the bottom end of the cylinder.

10. A composite sealing device according to claim 9, characterized in that said first coupling member (21) comprises a first symmetrical segment (211) and a first asymmetrical segment (212) connected to the inside of said first symmetrical segment (211), said second coupling member (22) comprises a second symmetrical segment (221) and a second asymmetrical segment (222) connected to the inside of said second symmetrical segment (221), the outsides of said first symmetrical segment (211) and said second symmetrical segment (221) being affixed, said first symmetrical segment (211) and said second symmetrical segment (221) being symmetrical with respect to said reference plane, said first asymmetrical segment (212) and said second asymmetrical segment (222) being mutually spaced and co-cylindrical, said first asymmetrical segment (212) resting against said step plane, the sum of the length of said first asymmetrical segment (212) and the length of said flange end (11) and the length of said second asymmetrical segment (222) being equal in the axial direction of said sleeve (1) And the like.