CN108397559A - High sealing performance shut-off valve - Google Patents
High sealing performance shut-off valve Download PDFInfo
- Publication number
- CN108397559A CN108397559A CN201810040165.XA CN201810040165A CN108397559A CN 108397559 A CN108397559 A CN 108397559A CN 201810040165 A CN201810040165 A CN 201810040165A CN 108397559 A CN108397559 A CN 108397559A
- Authority
- CN
- China
- Prior art keywords
- valve
- stop surface
- sealing ring
- sealing
- shut
- 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
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Classifications
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention belongs to valve technology fields, and in particular to a kind of high sealing performance shut-off valve.The shut-off valve includes valve seat and flap, sealing ring is installed between valve seat and flap, step-like sealing stop surface is provided on the contact surface of flap and sealing ring, sealing stop surface includes the first axis stop surface set gradually from inside to outside, the second radial stop surface and third axial direction stop surface；It is provided with the pressure ring for fit sealing ring in first axis stop surface, is provided with multiple-sealed groove in the second radial stop surface, expanding trough is provided in third axial direction stop surface；Sealing ring is anchored in the annular groove collectively formed by pressure ring, the second radial stop surface and third axial direction stop surface.The present invention solves the technical problem of sealing reliability difference existing for shut-off valve in the prior art.The present invention sets the contact surface of flap and sealing ring to step-like sealing stop surface, reaches excellent sealing performance in 196 DEG C~+49 DEG C of a wide range of temperature range.
Description
Technical field
The invention belongs to valve technology fields, and in particular to a kind of high sealing performance shut-off valve.
Background technology
Shut-off valve is a kind of one of most widely used valve, and why very popular it is, is due to close during opening and closing
Frictional force is small between cover, relatively durable, and Lift is little, and manufacture is easy, easy to maintenance, is applicable not only to mesolow, and
And it is suitable for high pressure.The closure principle of shut-off valve is, by valve stem pressure, valve clack sealing surface to be made closely to be pasted with sealing surface of seat
It closes, prevents flow of media.China's valve " three changes are given " once provides, the flow direction of shut-off valve, uses from top to bottom without exception, so installation
When it is directional.Shut-off valve blocks one of class valve as most important, plays an important role in aerospace field.Make
For the critical elements of space equipment, shut-off valve realizes functions, the sealing performances such as medium conveying, cut-off, adjusting and directly affects
To the safe and reliable operation of space equipment.The structure length of shut-off valve is more than gate valve, while fluid resistance is big, when longtime running,
Sealing reliability is not strong.
Invention content
The object of the present invention is to provide a kind of high sealing performance shut-off valves, solve close existing for shut-off valve in the prior art
The technical issues of sealing poor reliability.
Technical solution of the invention is：A kind of high sealing performance shut-off valve, including valve seat and flap, valve seat and flap
Between sealing ring is installed, be characterized in that：Step-like sealing is provided on the contact surface of the flap and sealing ring to cut
Only face, the sealing stop surface include the first axis stop surface set gradually from inside to outside, the second radial stop surface and third
Axial stop surface；The pressure ring for fit sealing ring, the described second radial stop surface are provided in the first axis stop surface
On be provided with multiple-sealed groove, be provided with expanding trough in the third axial direction stop surface；The sealing ring is anchored on by pressure ring,
In the annular groove that two radial stop surfaces and third axial direction stop surface collectively form.
Further, above-mentioned pressure ring further includes the lug boss projected radially outward along flap, and the sealing ring is anchored on
Between two radial stop surfaces and the lug boss of pressure ring.
Further, above-mentioned pressure ring is fastenedly connected by hold-down bolt and flap.
Further, above-mentioned sealing ring is fine copper material sealing ring.
Further, above-mentioned sealing ring is the fine copper material sealing ring of T2-M annealed states.
Further, the contact surface roughness between above-mentioned sealing ring and valve seat is greater than or equal to 1.6 μm.
Further, the contact surface seal pressure q between above-mentioned sealing ring and valve seatMMeet following relationship：
Wherein, qMFor contact surface seal pressure, unit is MPa；F is valve management mechanism implementation capacity, and unit is N；QjTo be situated between
Matter acts on the power on flap, and unit is N；DjFor sealed diameter, unit is mm；bMFor the interface width of sealing ring and valve seat,
Unit is mm.
Further, it is provided with three seals slot in the above-mentioned second radial stop surface.
Further, the airtight slip of room temperature of above-mentioned high sealing performance shut-off valve is less than or equal to 5mL/min.
Further, the airtight slip of low temperature of above-mentioned high sealing performance shut-off valve is less than or equal to 10mL/min.
The beneficial effects of the present invention are：The present invention sets the contact surface of flap and sealing ring to step-like sealing and cuts
Only face reaches excellent sealing performance in -196 DEG C~+49 DEG C of a wide range of temperature range.
Description of the drawings
Fig. 1 is the hermetic unit cross section structure schematic diagram of high sealing performance shut-off valve of the present invention.
Wherein, reference numeral is as follows：1- valve seats, 2- flaps, 3- sealing rings, 41- first axis stop surfaces, the second diameters of 42-
To stop surface, 43- third axial direction stop surfaces, 5- pressure rings, 51- lug bosses, 52- hold-down bolts, 6- seal grooves, 7- expanding troughs.
Specific implementation mode
Referring to Fig. 1, the present invention provides a kind of high sealing performance shut-off valve, the structure of preferred embodiment includes valve seat 1
With flap 2, sealing ring 3 is installed between valve seat 1 and flap 2, flap 2 be provided on the contact surface of sealing ring 3 it is step-like close
Stop surface is sealed, sealing stop surface includes 42 and of the radial stop surface of first axis stop surface 41, second set gradually from inside to outside
Third axial direction stop surface 43.
The pressure ring 5 for fit sealing ring is provided in first axis stop surface 41, preferably, pressure ring 5 further includes along valve
The lug boss 51 that valve projects radially outward, sealing ring 3 are anchored between the second radial stop surface 42 and the lug boss 51 of pressure ring.Pressure
Ring 5 is fastenedly connected by hold-down bolt 52 and flap 2.
It is provided with three seals slot 6 in second radial stop surface 42, improves the leakproofness between flap 2 and sealing ring 3.
It is provided with expanding trough 7 in third axial direction stop surface 43；It deforms and is squeezed into expanding trough 7 after the indentation flap 2 of sealing ring 3,
Keep sealing ring fixed, sealing ring is avoided to fall off.
Sealing ring 3 is anchored on the annular collectively formed by the radial stop surface 42 of pressure ring 5, second and third axial direction stop surface 43
In slot.Sealing ring 3 is the fine copper material sealing ring of T2-M annealed states, particularly suitable under liquid oxygen, liquid nitrogen environment, on the one hand
It is preferable with liquid oxygen compatibility, it on the other hand can adapt to the low temperature environment of -196 DEG C of liquid nitrogen.The fine copper of T2-M annealed states is as soft
Metal material matches to form soft-hard sealing pair with valve seat, has good sealing performance.
Sealing performance between sealing ring and valve seat is related with the roughness of contact surface between the two, and surface roughness should not
Less than 1.6 μm.The seal pressure of contact surface can also influence sealing performance simultaneously, than pressing bigger sealing effect better, but not than pressure
It can exceed that the allowable than pressure of material.The calculating and selection of seal pressure are as follows：
According to valve working state, there are three kinds of different situations for the sealing force of sealing ring and flap, to ensure sealed reliable,
Seal pressure is both needed to meet the requirements under three kinds of states.
Valve zero load seal pressure is：
Medium power acts on seal pressure when above flap：
Medium power acts on seal pressure when below flap：
qMin≤qM≤qMax
Wherein, qMFor contact surface seal pressure, unit is MPa；F is valve management mechanism implementation capacity, and unit is N；QjTo be situated between
Matter acts on the power on flap, and unit is N；DjIt is 600mm for sealed diameter, in the present embodiment；bMFor connecing for sealing ring and valve seat
Contacting surface width, unit are mm.qMinIt is the minimum ratio pressure for ensureing sealing, it is related with sealing pair pairing material, it is taken in the present embodiment
4MPa。qMaxIt is the maximum allowable ratio pressure of sealing material, the present embodiment takes 89MPa.
The design parameter of high sealing performance shut-off valve is as follows in the present embodiment：
(1) sealed diameter：600mm；
(2) design pressure：1.6MPa；
(3) working media：Liquid oxygen, liquid nitrogen；
(4) operating temperature：- 196 DEG C~+49 DEG C；
(5) the airtight slip of room temperature：≤5mL/min；
(6) the airtight slip of low temperature：≤10mL/min.
High sealing performance shut-off valve of the present invention is tested by the low temperature airtightness under room temperature air-tight test, liquid nitrogen medium,
Sealing structure is had excellent performance, and meets technical requirement.
Claims (10)
1. a kind of high sealing performance shut-off valve, including valve seat and flap, install sealing ring between valve seat and flap, feature exists
In：Step-like sealing stop surface is provided on the contact surface of the flap and sealing ring, the sealing stop surface includes in
First axis stop surface, the second radial stop surface and the third axial direction stop surface set gradually outward；The first axis cut-off
It is provided with the pressure ring for fit sealing ring on face, multiple-sealed groove, the third are provided in the described second radial stop surface
It is provided with expanding trough in axial stop surface；The sealing ring is anchored on axially to be ended by pressure ring, the second radial stop surface and third
In the annular groove that face collectively forms.
2. high sealing performance shut-off valve according to claim 1, it is characterised in that：The pressure ring further includes along flap radial direction
The lug boss outwardly protruded, the sealing ring are anchored between the second radial stop surface and the lug boss of pressure ring.
3. high sealing performance shut-off valve according to claim 2, it is characterised in that：The pressure ring passes through hold-down bolt and valve
Valve is fastenedly connected.
4. according to any high sealing performance shut-off valve in claim 1-3, it is characterised in that：The sealing ring is fine copper
Material sealing ring.
5. high sealing performance shut-off valve according to claim 4, it is characterised in that：The sealing ring is T2-M annealed states
Fine copper material sealing ring.
6. high sealing performance shut-off valve according to claim 5, it is characterised in that：Connecing between the sealing ring and valve seat
Contacting surface roughness is greater than or equal to 1.6 μm.
7. according to any high sealing performance shut-off valve in claim 1-3, it is characterised in that：The sealing ring and valve seat
Between contact surface seal pressure qMMeet following relationship：
Wherein, qMFor contact surface seal pressure, unit is MPa；F is valve management mechanism implementation capacity, and unit is N；QjMake for medium
Power on flap, unit are N；DjFor sealed diameter, unit is mm；bMFor the interface width of sealing ring and valve seat, unit
It is mm.
8. according to any high sealing performance shut-off valve in claim 1-3, it is characterised in that：Described second radial cut-off
Three seals slot is provided on face.
9. high sealing performance shut-off valve according to claim 8, it is characterised in that：The high sealing performance shut-off valve it is normal
The close slip of wet is less than or equal to 5mL/min.
10. high sealing performance shut-off valve according to claim 9, it is characterised in that：The high sealing performance shut-off valve
The airtight slip of low temperature is less than or equal to 10mL/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810040165.XA CN108397559A (en) | 2018-01-16 | 2018-01-16 | High sealing performance shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810040165.XA CN108397559A (en) | 2018-01-16 | 2018-01-16 | High sealing performance shut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108397559A true CN108397559A (en) | 2018-08-14 |
Family
ID=63094911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810040165.XA Pending CN108397559A (en) | 2018-01-16 | 2018-01-16 | High sealing performance shut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108397559A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4272054A (en) * | 1979-01-31 | 1981-06-09 | Tokyo Koso K.K. | Fire-safe sealing device for valve |
| US4296307A (en) * | 1978-10-09 | 1981-10-20 | Toa Valve Co. Ltd. | Manufacturing method of the valve disk of spring loaded safety valves |
| CN202971956U (en) * | 2012-12-17 | 2013-06-05 | 浙江纽顿流体控制有限公司 | Valve special for chlorine gas |
| CN205578741U (en) * | 2016-03-08 | 2016-09-14 | 陈国顺 | Be suitable for programme -controlled stop valve |
| CN207333724U (en) * | 2017-03-11 | 2018-05-08 | 浙江万士通阀门有限公司 | A kind of antibiotic abrasion-resistant cut-off valve |
-
2018
- 2018-01-16 CN CN201810040165.XA patent/CN108397559A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4296307A (en) * | 1978-10-09 | 1981-10-20 | Toa Valve Co. Ltd. | Manufacturing method of the valve disk of spring loaded safety valves |
| US4272054A (en) * | 1979-01-31 | 1981-06-09 | Tokyo Koso K.K. | Fire-safe sealing device for valve |
| CN202971956U (en) * | 2012-12-17 | 2013-06-05 | 浙江纽顿流体控制有限公司 | Valve special for chlorine gas |
| CN205578741U (en) * | 2016-03-08 | 2016-09-14 | 陈国顺 | Be suitable for programme -controlled stop valve |
| CN207333724U (en) * | 2017-03-11 | 2018-05-08 | 浙江万士通阀门有限公司 | A kind of antibiotic abrasion-resistant cut-off valve |
Non-Patent Citations (1)
| Title |
|---|
| 陆培文等: "《阀门选用手册》", 31 May 2009, 机械工业出版社 * |
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Application publication date: 20180814 |
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