CN113202945A - Plug sealing ring for cryogenic valve - Google Patents
Plug sealing ring for cryogenic valve Download PDFInfo
- Publication number
- CN113202945A CN113202945A CN202110526442.XA CN202110526442A CN113202945A CN 113202945 A CN113202945 A CN 113202945A CN 202110526442 A CN202110526442 A CN 202110526442A CN 113202945 A CN113202945 A CN 113202945A
- Authority
- CN
- China
- Prior art keywords
- valve
- metal
- sealing ring
- ring
- valve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 65
- 239000002184 metal Substances 0.000 claims abstract description 27
- 229910052755 nonmetal Inorganic materials 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims description 3
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 claims description 3
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Abstract
The invention relates to the technical field of sealing rings, in particular to a flooding plug sealing ring for a cryogenic valve, which comprises a non-metal sealing ring, a metal backpressure ring, a plurality of springs and a metal ring insert, wherein the metal backpressure ring is matched with the back surface of the non-metal sealing ring, the plurality of springs are fixedly arranged in the non-metal sealing ring, and the metal ring insert is embedded in the non-metal sealing ring. The sealing element of the invention adopts double-layer spring support, and can effectively compensate the shrinkage of the valve body and the valve seat under the deep cooling working condition; meanwhile, the valve has a pressure self-tightening sealing function, and the influence of the microscopic unevenness of the sealing surfaces of the valve body and the valve seat on the sealing performance of the valve can be reduced.
Description
Technical Field
The invention relates to the technical field of sealing rings, in particular to a flooding plug sealing ring for a cryogenic valve.
Background
A sealed product, broadly defined as a product that controls and prevents the flow of liquid between adjacent localized areas in the device or to the external environment; the sealing element for the cryogenic valve has the advantages that the shrinkage of parts such as a valve body, a valve seat and the like under the ultralow-temperature working condition can be effectively compensated, the sealing element has a pressure self-tightening sealing function, and the spring in the flooding plug sealing ring can store elastic potential energy to realize pressure self-tightening sealing, so that the flooding plug sealing ring is widely applied to the cryogenic valve;
the valve seat structure of the ultralow temperature ball valve used under the deep cooling working condition in the prior art is a DIB-II structure, the valve seat at the downstream end needs to realize a double-piston effect, and the medium from two ends needs to be cut off in the sealing between the valve seat and the valve body, so that the valve seat does not have a self-pressure-relief function, and a large enough installation guide angle is generally designed for conveniently disassembling and assembling the valve seat and the valve body; the installed flood plug seals are typically installed in two sets back-to-back, as shown in fig. 1, however, this configuration has some drawbacks:
1. the two groups of flooding plug sealing rings have the possibility of radial movement under a high-pressure medium, and the sealing points of the flooding plug rings on the two sides are not aligned, so that flooding plug sealing failure is easily caused;
2. the circular spring is directly installed in the arc-shaped groove of the metal ring insert, the phenomenon that metal is in direct contact with metal is generated, and the possibility of shaking, wearing and failure exists when the valve is opened and closed frequently under the deep cooling high-pressure working condition.
Disclosure of Invention
The invention aims to solve the defect that the sealing point of a flooding plug ring is not aligned to cause flooding plug sealing failure in the prior art, and provides the flooding plug sealing ring for the cryogenic valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
the design is a general stopper sealing washer for cryrogenic valve, including non-metallic seal circle, metal backpressure ring, a plurality of spring and becket inserts, the back of metal backpressure ring and non-metallic seal circle cooperatees, and is a plurality of the equal fixed mounting of spring is in non-metallic seal circle, becket inserts inlays inside non-metallic seal circle.
Preferably, the upper end and the lower end of the non-metal sealing ring are respectively provided with a valve body and a valve seat, the valve seat is fixedly installed in the valve body, and the non-metal sealing ring is installed between the inner walls of the valve seat and the valve body.
Preferably, a valve cavity is formed in the valve body, and the valve seat is installed in the valve cavity.
Preferably, a valve body guide angle is formed in one end, in contact with the valve seat, of the valve body, and the other end, in contact with the valve body, of the valve seat is convenient to detach from the valve seat.
Preferably, the both sides of metal back clamping ring are processed into the groove structure, and become "worker" type structure, the back of non-metal seal circle process into with groove assorted convex surface structure, the convex surface of non-metal seal circle cooperatees with the recess of metal back clamping ring.
Preferably, the number of the springs is two, and the outer surfaces of the springs are all coated with a composite structure of PCTFE lips.
Preferably, the opening side of the nonmetal sealing ring is provided with a mounting groove matched with the spring, and the spring is fixedly mounted in the corresponding mounting groove.
The invention provides a flooding plug sealing ring for a cryogenic valve, which has the beneficial effects that: the sealing element of the invention adopts double-layer spring support, and can effectively compensate the shrinkage of the valve body and the valve seat under the deep cooling working condition; meanwhile, the valve has a pressure self-tightening sealing function, and the influence of the microscopic unevenness of the sealing surfaces of the valve body and the valve seat on the sealing performance of the valve can be reduced.
Drawings
FIG. 1 is a schematic view of a mounting structure of a flooding plug seal ring in the prior art;
FIG. 2 is a schematic structural diagram of a flooding plug sealing ring for a cryogenic valve according to the present invention;
fig. 3 is an enlarged schematic view of a portion a of fig. 2.
In the figure: the valve comprises a valve body 1, a valve body guide angle 11, a valve cavity 2, a valve seat 3, a valve seat guide angle 31 nonmetal sealing ring 4, a mounting groove 41, a metal back pressure ring 5, a spring 6 and a metal ring insert 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 2-3, the flooding plug sealing ring for the cryogenic valve comprises a nonmetal sealing ring 4, a metal back pressure ring 5, a plurality of springs 6 and a metal ring insert 7, wherein the metal back pressure ring 5 is matched with the back surface of the nonmetal sealing ring 4, two sides of the metal back pressure ring 5 are processed into a groove structure and an I-shaped structure, the back surface of the nonmetal sealing ring 4 is processed into a convex surface structure matched with the groove, and the convex surface of the nonmetal sealing ring 4 is matched with the groove of the metal back pressure ring 5; the function of automatically adjusting the center of the two ends of the metal back pressure ring 5 and preventing the root of the non-metal sealing ring 4 from being extruded out can be achieved.
The number of the springs 6 is two, the outer surfaces of the springs are all of a composite structure coated with PCTFE lip edges, and the metal ring inserts 7 are embedded in the non-metal sealing ring 4; the opening side of the non-metal sealing ring 4 is provided with an installation groove 41 matched with the spring 6, and the spring 6 is fixedly installed in the corresponding installation groove 41, so that direct contact between metal and metal is avoided, and the stability of the spring is ensured; in addition, the metal ring insert 7 is embedded in the nonmetal sealing ring 4, so that the degree of freedom of the nonmetal sealing ring can be limited, and a better supporting effect can be achieved.
The upper end and the lower end of the non-metal sealing ring 4 are respectively provided with a valve body 1 and a valve seat 3, the valve seat 3 is fixedly arranged in the valve body 1, and the non-metal sealing ring 4 is arranged between the valve seat 3 and the inner wall of the valve body 1; the valve body guide angle 11 is arranged at one end of the contact surface of the valve body 1 and the valve seat 3, and the valve seat guide angle 31 is arranged at the other end of the contact surface of the valve body 1 and the valve seat 3, so that the valve seat 3 and the valve body 1 can be conveniently detached.
The sealing element of the invention adopts double-layer spring support, and can effectively compensate the shrinkage of the valve body and the valve seat under the deep cooling working condition; meanwhile, the valve has a pressure self-tightening sealing function, and the influence of the microscopic unevenness of the sealing surfaces of the valve body and the valve seat on the sealing performance of the valve can be reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The utility model provides a deep cooling valve is with general stopper sealing washer, its characterized in that, includes non-metallic seal circle (4), metal backing ring (5), a plurality of spring (6) and becket inserts (7), the back of metal backing ring (5) and non-metallic seal circle (4) cooperatees, and is a plurality of the equal fixed mounting of spring (6) is in non-metallic seal circle (4), becket inserts (7) inlay inside non-metallic seal circle (4).
2. The flooding plug sealing ring for the cryogenic valve according to claim 1, characterized in that the upper and lower ends of the non-metal sealing ring (4) are respectively provided with the valve body (1) and the valve seat (3), the valve seat (3) is fixedly installed in the valve body (1), and the non-metal sealing ring (4) is installed between the valve seat (3) and the inner wall of the valve body (1).
3. The flooding plug sealing ring for the cryogenic valve according to claim 2, characterized in that the valve cavity (2) is opened inside the valve body (1), and the valve seat (3) is installed inside the valve cavity (2).
4. The flooding plug sealing ring for the cryogenic valve according to claim 3, characterized in that a valve body guide angle (11) is formed at one end of the contact surface of the valve body (1) and the valve seat (3), and a valve seat guide angle (31) is formed at the other end of the contact surface of the valve body (1) and the valve seat (3), so that the valve seat (3) and the valve body (1) can be conveniently detached.
5. The flooding plug sealing ring for the cryogenic valve according to claim 3, characterized in that the two sides of the metal backpressure ring (5) are processed into a groove structure and an I-shaped structure, the back of the non-metal sealing ring (4) is processed into a convex structure matched with the groove, and the convex surface of the non-metal sealing ring (4) is matched with the groove of the metal backpressure ring (5).
6. The seizure seal ring for cryogenic valve according to claim 1, wherein the number of the springs (6) is two and the outer surface is covered with a composite structure of PCTFE lips.
7. The flooding plug sealing ring for the cryogenic valve according to claim 6, characterized in that the opening side of the non-metal sealing ring (4) is provided with a mounting groove (41) matched with the spring (6), and the spring (6) is fixedly mounted in the corresponding mounting groove (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526442.XA CN113202945A (en) | 2021-05-14 | 2021-05-14 | Plug sealing ring for cryogenic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526442.XA CN113202945A (en) | 2021-05-14 | 2021-05-14 | Plug sealing ring for cryogenic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113202945A true CN113202945A (en) | 2021-08-03 |
Family
ID=77031225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526442.XA Pending CN113202945A (en) | 2021-05-14 | 2021-05-14 | Plug sealing ring for cryogenic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113202945A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202100029588A1 (en) * | 2021-11-23 | 2023-05-23 | Italian Valve Service S R L | SEALING SYSTEM FOR MECHANICAL PARTS |
-
2021
- 2021-05-14 CN CN202110526442.XA patent/CN113202945A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202100029588A1 (en) * | 2021-11-23 | 2023-05-23 | Italian Valve Service S R L | SEALING SYSTEM FOR MECHANICAL PARTS |
| WO2023094932A1 (en) * | 2021-11-23 | 2023-06-01 | Italian Valve Service S.R.L. | Sealing system for mechanical members |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231212 Address after: 363900 No.1 Shunda Road, Gunong Farm, Changtai District, Zhangzhou City, Fujian Province Applicant after: Fujian Huishang Technology Co.,Ltd. Address before: 363900 Yintang Industrial Zone, Gu Nong farm, Changtai County, Zhangzhou City, Fujian Province Applicant before: DATONG RECIPROCITY GROUP CO.,LTD. |
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| TA01 | Transfer of patent application right |