CN105221830A - Low-leakage ball valve - Google Patents
Low-leakage ball valve Download PDFInfo
- Publication number
- CN105221830A CN105221830A CN201510736566.5A CN201510736566A CN105221830A CN 105221830 A CN105221830 A CN 105221830A CN 201510736566 A CN201510736566 A CN 201510736566A CN 105221830 A CN105221830 A CN 105221830A
- Authority
- CN
- China
- Prior art keywords
- sealing
- valve rod
- valve
- ball valve
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 123
- 210000004907 gland Anatomy 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 27
- 229910002804 graphite Inorganic materials 0.000 claims description 27
- 239000010439 graphite Substances 0.000 claims description 27
- 229910001220 stainless steel Inorganic materials 0.000 claims description 25
- 239000010935 stainless steel Substances 0.000 claims description 25
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 24
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 24
- -1 polytetrafluoroethylene Polymers 0.000 claims description 22
- 238000012856 packing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 239000004809 Teflon Substances 0.000 claims description 4
- 229920006362 Teflon® Polymers 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000002045 lasting effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
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
- F16K5/0694—Spindle sealings
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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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
- F16K5/0673—Composite packings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a low-leakage ball valve, which comprises: valve body, end cover, valve rod, spheroid, disk seat and gland owing to adopted the triple seal structure of new valve rod: the valve rod lower part is sealed, the lower part is sealed in the valve rod, upper portion is sealed in the valve rod to and the end cover seal structure of valve body and end cover department, thereby have following advantage: aiming at the problem of easy leakage in the existing ball valve, the sealing of the valve rod 3 and the sealing of the valve body and the end cover are enhanced, the leakage of media from the valve rod and the valve body and the end cover is prevented, particularly, when the temperature and the pressure change, the danger of leakage of the ball valve is avoided, the safety and the reliability of the ball valve are ensured, and the service life of the ball valve is prolonged.
Description
Technical field
The present invention relates to a kind of pipe control valve, particularly a kind of low leakage ball valve.
Background technique
Flow resistance is little owing to having for ball valve, switch rapidly, good seal performance, long service life, be convenient to gas control and the feature such as automatically controlled, have wide range of applications.
The modal problem of ball valve is problem of leakage.Ball valve leaks outside two places usually, and a place leaks as valve stem seal leaks, and the main cause causing valve rod place to leak is the lateral load owing to acting on valve rod.Due to ball valve improper use or actuator's bias, can cause valve rod produces lateral load, side loading less on usual valve rod just likely causes significant leakage, and causes serious safety problem.Another place leaks and leaks for valve body and end caps, causes main cause that valve body and end caps are leaked to be that temperature and pressure can cause relaxing of pad when changing, directly causes the leakage of valve body and end caps.
Summary of the invention
For the easy problem leaked outside existed in existing ball-valve structure, one object of the present invention is to provide a kind of low leakage ball valve, and propose new design of Sealing Structure to the valve rod place of ball valve, the sealing configuration at valve rod place is provided with triple seal.The lateral load that the ball face sealing of stem lower portion sealing bears for compensating valve rod rotates and the reason such as the prooving of valve seat causes valve rod place, when valve rod is in lateral load, maintain constant pressure between the sealing surface that valve rod spheric structure and sealing seat can be made to be formed, maintains better sealing.The groove that sealing seat is arranged and corner cut structure, be conducive to the ball face sealing between valve rod spherical structure and sealing seat, for valve rod provides best protection, prevent ball valve from leaking outside.Meanwhile, the disc spring that stem bottom is arranged, can provide initial tension of spring, ensures the sealing between valve rod spherical structure and sealing seat.In the sealing of valve rod middle and lower part, in tension force seal ring, the tension force of stainless steel ring can force polytetrafluoroethylene floor to be closely attached between valve rod and valve body, its pressure produced can reach extraordinary sealing, tension force seal ring can the wearing and tearing of compensation sealing seat with eccentric, and lasting resilience, ensure sealability.Valve rod middle and upper part seals, and carries out dynamic load by disc spring pad to graphite packing, ensures the sealing at valve rod place.Above triple seal constitutes the sealing configuration at ball-valve valve rod place, ensure that the low leaking performance at valve rod place, extends ball valve working life under severe conditions, the life of valve particularly during temperature and pressure change.
Another object of the present invention is to provide a kind of low leakage ball valve, and the sealing configuration of valve body and end cap have employed three kinds of material Composition spacers, is formed by polytetrafluoroethylene floor, stainless steel lining and graphite layer MULTILAYER COMPOSITE.Polytetrafluoroethylene floor has chemical inertness; graphite layer has fire safety characteristic; and stainless steel lining is " V " type structure; for graphite layer and polytetrafluoroethylene floor provide support and dynamic load; can protect it from extruding and the impact of cold flow in temperature and pressure change procedure, there is not the danger of leaking in guarantee valve body and end caps.
For reaching this object, the invention provides following technological scheme:
The invention provides a kind of low leakage ball valve, comprise: valve body, end cap, valve rod, spheroid, valve seat and gland, also comprise stem lower portion sealing, described stem lower portion sealing comprises sealing seat and disc spring, described valve rod has valve rod protruding structure, and described valve rod protruding structure is positioned at described stem lower portion, is the protruding structure that lower diameter is greater than diameter, described sealing seat side contacts with the protruding side of described valve rod protruding structure, and described sealing seat opposite side contacts with valve body; Described disc spring is between described valve rod lower end surface and described spheroid groove upper-end surface.The lateral load that the sealing arranging protruding structure is born for the valve rod place compensating valve rod and rotate and the reason such as the prooving of valve seat causes, when valve rod is in lateral load, maintain constant pressure between the sealing surface that valve rod protruding structure and sealing seat can be made to be formed, maintains better sealing.The disc spring that stem bottom is arranged, can provide initial tension of spring, ensures the sealing between valve rod spherical structure and sealing seat.
In a concrete technological scheme, the protruding side of described valve rod protruding structure is arc sphere, forms ball face sealing.
In the technological scheme that another is concrete, described sealing seat have sealing surface V-type groove, bottom V-type groove and corner cut, described sealing surface V-type slot is on the side that described sealing seat contacts with described valve rod protruding structure, V-type slot, described bottom is towards on the section of described spheroid bottom described sealing seat, and described corner cut is positioned at the angle that described sealing seat and described valve body two surface of contact are formed.
In the technological scheme that another is concrete, the material of described sealing seat is teflon.
In the technological scheme that another is concrete, also comprise the sealing of valve rod middle and lower part, the sealing of described valve rod middle and lower part comprises tension force seal ring and pressure ring, described pressure ring to be positioned at above described tension force seal ring and to contact with its upper-end surface, and there is a boss side of described pressure ring upper end surface and described valve body contact, plays stopping function.
In the technological scheme that another is concrete, described tension force seal ring comprises stainless steel ring and polytetrafluoroethylene floor A, described stainless steel ring is around formation hollow ring chamber and having an opening on described spheroid direction, and described teflon A layer to be positioned at outside described stainless steel ring and the sealing surface formed with described valve rod and described valve body contact.The tension force of stainless steel ring can force polytetrafluoroethylene floor A to be closely attached between valve rod and valve body, and its pressure produced can reach extraordinary sealing, tension force seal ring can the wearing and tearing of compensation sealing seat with eccentric, and lasting resilience, ensures sealability.
In the technological scheme that another is concrete, also comprise the sealing of valve rod middle and upper part, the sealing of described valve rod middle and upper part comprises disc spring pad sheet, metallic shim and graphite packing, graphite packing described in two panels contacts layout up and down, described metallic shim is positioned at above described graphite packing, disc spring pad described in two panels is positioned at above described metallic shim, and described in two panels, disc spring pad (8-1) adopts involutory compound mode, its diameter smallest end contact with each other and largest diameter end relatively and away from.
In the technological scheme that another is concrete, end cover sealing structure is also had between described valve body and described end cap, described end cover sealing structure comprises one or more layers graphite layer, stainless steel lining and polytetrafluoroethylene floor B, described graphite layer, described stainless steel lining and described polytetrafluoroethylene floor B be mutual stack combinations successively, and described end cover sealing structure outermost surface is graphite layer and has periphery and described valve body contact, innermost layer is described polytetrafluoroethylene floor B and has inner headed face to contact with described end cap simultaneously.
In the technological scheme that another is concrete, every layer of described stainless steel lining is all " V " shape structure.
The low leakage ball valve of one provided by the invention, owing to have employed:
1. the valve rod triple seal structure of innovation.
2. valve body and end cover sealing structure.
Thus have the following advantages: for the easy problem leaked outside existed in existing ball valve, strengthen the sealing at valve rod place and the sealing of valve body and end caps, prevent medium from leaking from valve rod and valve body and end caps, particularly under the operating mode of temperature and pressure change, avoid the danger that ball valve leaks outside, ensure that the safety and reliability of ball valve, extend the working life of ball valve.Meanwhile, the present invention have structure simple, be easy to processing, be beneficial to the features such as assembling, energy-conserving and environment-protective, danger medium and temperature can be widely used in, harsh operating mode that pressure changes.
Accompanying drawing explanation
Fig. 1 is the structural representation of low leakage ball valve;
Fig. 2 is the structural representation of the stem lower portion sealing of low leakage ball valve;
Fig. 3 is the structural representation of the valve rod middle and lower part sealing of low leakage ball valve;
Fig. 4 is the structural representation of the valve rod middle and upper part sealing of low leakage ball valve;
Fig. 5 is the low valve body of leakage ball valve and the structural representation of end bracket enclosed.
In figure:
1, valve body; 2, end cap; 3, valve rod; 4, spheroid; 5, valve seat; 6, stem lower portion sealing; 7, valve rod middle and lower part sealing; 8, valve rod middle and upper part sealing, 9 end cover sealing structures; 3-1, valve rod protruding structure; 6-1, sealing seat; 6-1-1, sealing surface V-type groove; 6-1-2, bottom V-type groove; 6-1-3, corner cut; 6-2, disc spring; 7-1, tension force seal ring; 7-2, pressure ring; 7-1-1, stainless steel ring; 7-1-2, polytetrafluoroethylene floor A; 8-1, disc spring pad; 8-2, metallic shim; 8-3, graphite packing; 9-1, graphite layer; 9-2, stainless steel lining; 9-3, polytetrafluoroethylene floor B.
Embodiment
Be described in more detail the present invention below in conjunction with accompanying drawing 1-5, the description of this part is only exemplary and explanatory, should not have any restriction in protection scope of the present invention.
As shown in Figure 1, the low leakage ball valve of one that the present invention proposes, comprise: the whole valve body be made up of valve body 1 and end cap 2, in valve body, spheroid 4 is floating, valve rod 3 drives spheroid 4 to complete switch motion, under valve-closed state, produce certain displacement at pressure medium effect lower sphere 4 and be pressed on the valve seat 5 of outlet end, form ball face sealing, valve rod place sealing configuration is provided with triple seal, is stem lower portion sealing 6, valve rod middle and lower part sealing 7 and valve rod middle and upper part sealing 8 respectively, ensure the sealing at valve rod 3 place, avoid medium to leak from valve rod 3.Valve body 1 is made up of trilaminate material with the end cover sealing structure 9 at end cap 2 place, is graphite layer 9-1, stainless steel lining 9-2 and polytetrafluoroethylene floor B9-3 respectively, and multilayer lamination together, ensures that the danger of leaking does not occur for valve body 1 and end cap 2 place.
As shown in Figure 2, stem lower portion sealing 6 comprises valve rod protruding structure 3-1, sealing seat 6-1 and disc spring 6-2, wherein the material of sealing seat 6-1 is teflon, valve rod protruding structure 3-1 is positioned at valve rod 3 bottom, it is the spheric structure that lower diameter is greater than diameter, sealing seat 6-1 side contacts with the sphere of valve rod protruding structure 3-1 formation ball face sealing, sealing seat 6-1 opposite side contacts with valve body 1, disc spring 6-2 is between valve rod 3 lower end surface and described spheroid 4 groove upper-end surface, sealing seat 6-1 is provided with sealing surface V-type groove 6-1-1, bottom V-type groove 6-1-2 and corner cut 6-1-3 structure, sealing surface V-type groove 6-1-1 is positioned on the side that sealing seat 6-1 contacts with valve rod protruding structure 3-1, bottom V-type groove 6-1-2 is positioned at bottom sealing seat 6-1 towards on the section of spheroid 4, corner cut 6-1-3 is positioned at the angle that sealing seat 6-1 and valve body 1 two surface of contact are formed.Stem lower portion sealing 6 is ball face sealing, it is the lateral load that valve rod 3 place caused for compensating the reasons such as valve rod 3 rotation and valve seat 5 wearing and tearing bears, when valve rod 3 is in lateral load, maintain constant pressure between the spherical seal surface that can make valve rod protruding structure 3-1 and sealing seat 6-1, forms good sealing.Sealing seat 6-1 has sealing surface V-type groove 6-1-1, bottom V-type groove 6-1-2 and corner cut 6-1-3 structure, is conducive to ball face sealing, for valve rod 3 provides best protection, prevents valve leak.Meanwhile, stem bottom arranges disc spring 6-2, provides initial tension of spring, ensures the sealing of valve rod protruding structure 3-1 and sealing seat 6-1.
As shown in Figure 3, valve rod middle and lower part sealing 7 comprises tension force seal ring 7-1 and pressure ring 7-2, and tension force seal ring 7-1 comprises stainless steel ring 7-1-1 and polytetrafluoroethylene floor A7-1-2.Stainless steel ring 7-1-1 is around formation hollow ring chamber and having an opening on spheroid 4 direction, and polytetrafluoroethylene floor A7-1-2 to be positioned at outside stainless steel ring 7-1-1 and to be formed and sealing surface that valve rod 3 contacts with valve body 1.In tension force seal ring 7-1, the tension force of stainless steel ring 7-1-1 can force polytetrafluoroethylene floor A7-1-2 to be closely attached between valve rod 3 and valve body 1, its pressure produced can reach extraordinary sealing, tension force seal ring 7-1 can the wearing and tearing of compensation sealing seat 6-1 with eccentric, and lasting resilience, ensure sealability.
As shown in Figure 4, valve rod middle and upper part sealing 8 is made up of disc spring pad 8-1, metallic shim 8-2 and graphite packing 8-3.Two panels graphite packing 8-3 contacts layout up and down, metallic shim 8-2 is placed in above graphite packing 8-3, disc spring pad 8-1 is placed in above metallic shim 8-2, and two panels disc spring pad 8-1 adopts involutory compound mode, its diameter smallest end contact with each other and largest diameter end relatively and away from.By disc spring pad 8-1 to graphite packing 8-3 dynamic load, to ensure the sealing at valve rod place.
As shown in Figure 5, valve body 1 have employed three kinds of material Composition spacers with the end cover sealing structure 9 at end cap 2 place, by graphite layer 9-1, stainless steel lining 9-2 and polytetrafluoroethylene floor B9-3 MULTILAYER COMPOSITE and successively stack combinations forms mutually, and end cover sealing structure 9 outermost surface is graphite layer 9-1 and has periphery to contact with valve body 1, innermost layer is polytetrafluoroethylene floor B9-3 and has inner headed face to contact with end cap 2 simultaneously.Polytetrafluoroethylene floor B9-3 has chemical inertness; graphite layer 9-1 has fire safety characteristic; because stainless steel lining 9-2 is " V " type structure; so provide support and dynamic load; graphite layer 9-1 and polytetrafluoroethylene floor B9-3 can be protected in the environment of temperature and pressure change procedure from extruding and the impact of cold flow, ensure that the danger of leaking does not occur for valve body 1 and end cap 2 place.
It can thus be appreciated that, the low leakage ball valve of one provided by the invention, owing to have employed new valve rod triple seal structure: stem lower portion sealing 6, valve rod middle and lower part sealing 7, valve rod middle and upper part sealing 8, and the end cover sealing structure 9 of valve body and end caps, thus have the following advantages: for the incident problem leaked outside existed in existing ball valve, strengthen the sealing at valve rod 3 place and the sealing at valve body 1 and end cap 2 place, prevent medium from leaking from valve rod 3 and valve body 1 with end cap 2 place, particularly when temperature and pressure changes, avoid the danger that ball valve leaks outside, ensure that the safety and reliability of ball valve, extend the working life of ball valve.Meanwhile, the present invention have structure simple, be easy to processing, be beneficial to the features such as assembling, energy-conserving and environment-protective, danger medium and temperature can be widely used in, harsh operating mode that pressure changes.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. one kind low leakage ball valve, comprise: valve body (1), end cap (2), valve rod (3), spheroid (4), valve seat (5) and gland (10), it is characterized in that: also comprise stem lower portion sealing (6), described stem lower portion sealing (6) comprises sealing seat (6-1) and disc spring (6-2), described valve rod (3) has valve rod protruding structure (3-1), described valve rod protruding structure (3-1) is positioned at described valve rod (3) bottom, it is the protruding structure that lower diameter is greater than diameter, described sealing seat (6-1) side contacts with the protruding side of described valve rod protruding structure (3-1), described sealing seat (6-1) opposite side contacts with valve body (1), described disc spring (6-2) is positioned between described valve rod (3) lower end surface and described spheroid (4) groove upper-end surface.
2. low leakage ball valve according to claim 1, is characterized in that: the protruding side of described valve rod protruding structure (3-1) is arc sphere.
3. low leakage ball valve according to claim 1, it is characterized in that: described sealing seat (6-1) has sealing surface V-type groove (6-1-1), bottom V-type groove (6-1-2) and corner cut (6-1-3), described sealing surface V-type groove (6-1-1) is positioned on the side that described sealing seat (6-1) contacts with described valve rod protruding structure (3-1), described bottom V-type groove (6-1-2) is positioned at described sealing seat (6-1) bottom towards on the section of described spheroid (4), described corner cut (6-1-3) is positioned at described sealing seat (6-1) and described valve body (1) two angle that surface of contact is formed.
4. low leakage ball valve according to claim 3, is characterized in that: the material of described sealing seat (6-1) is teflon.
5. the low leakage ball valve according to any one of claim 1-4, it is characterized in that: also comprise valve rod middle and lower part sealing (7), described valve rod middle and lower part sealing (7) comprises tension force seal ring (7-1) and pressure ring (7-2), described pressure ring (7-2) is positioned at described tension force seal ring (7-1) top and contacts with its upper-end surface, and there is a boss side that described pressure ring (7-2) upper end surface contacts with described valve body (1), plays stopping function.
6. low leakage ball valve according to claim 5, it is characterized in that: described tension force seal ring (7-1) comprises stainless steel ring (7-1-1) and polytetrafluoroethylene floor A (7-1-2), described stainless steel ring (7-1-1) is around formation hollow ring chamber and having an opening on described spheroid (4) direction, and described polytetrafluoroethylene floor A (7-1-2) is positioned at described stainless steel ring (7-1-1) outside and is formed and sealing surface that described valve rod (3) contacts with described valve body (1).
7. the low leakage ball valve according to any one of claim 1-6, it is characterized in that: also comprise valve rod middle and upper part sealing (8), described valve rod middle and upper part sealing (8) comprises disc spring pad (8-1), metallic shim (8-2) and graphite packing (8-3), graphite packing described in two panels (8-3) contacts layout up and down, described metallic shim (8-2) is placed in described graphite packing (8-3) top, disc spring pad (8-1) described in two panels is placed in described metallic shim (8-2) top, described in two panels, disc spring pad (8-1) adopts involutory compound mode, its diameter smallest end contact with each other and largest diameter end relatively and away from.
8. the low leakage ball valve according to any one of claim 1-7, it is characterized in that: between described valve body (1) and described end cap (2), also have end cover sealing structure (9), described end cover sealing structure (9) comprises one or more layers graphite layer (9-1), stainless steel lining (9-2) and polytetrafluoroethylene floor B (9-3), described graphite layer (9-1), described stainless steel lining (9-2) and described polytetrafluoroethylene floor B (9-3) be mutual stack combinations successively, and described end cover sealing structure (9) outermost surface is graphite layer (9-1) and has periphery to contact with described valve body (1), innermost layer is described polytetrafluoroethylene floor B (9-3) and has inner headed face to contact with described end cap (2) simultaneously.
9. low leakage ball valve according to claim 1, is characterized in that: every layer of described stainless steel lining (9-2) is all " V " shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736566.5A CN105221830B (en) | 2015-11-03 | 2015-11-03 | Low-leakage ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736566.5A CN105221830B (en) | 2015-11-03 | 2015-11-03 | Low-leakage ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221830A true CN105221830A (en) | 2016-01-06 |
| CN105221830B CN105221830B (en) | 2018-06-19 |
Family
ID=54990966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510736566.5A Active CN105221830B (en) | 2015-11-03 | 2015-11-03 | Low-leakage ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221830B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980502A (en) * | 2018-09-13 | 2018-12-11 | 江苏永昌膨胀节有限公司 | A kind of high stability sleeve expansion joint |
| CN109084022A (en) * | 2018-09-21 | 2018-12-25 | 上海沪东造船阀门有限公司 | A kind of ultralow temperature ball valve seals |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201900002073A1 (en) * | 2019-02-13 | 2020-08-13 | Ribel Valvole Srl | BALL VALVE |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108980502A (en) * | 2018-09-13 | 2018-12-11 | 江苏永昌膨胀节有限公司 | A kind of high stability sleeve expansion joint |
| CN109084022A (en) * | 2018-09-21 | 2018-12-25 | 上海沪东造船阀门有限公司 | A kind of ultralow temperature ball valve seals |
| CN109084022B (en) * | 2018-09-21 | 2021-03-23 | 上海沪东造船阀门有限公司 | Ultra-low temperature ball valve seal ring |
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| Publication number | Publication date |
|---|---|
| CN105221830B (en) | 2018-06-19 |
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