CN105090538B - From filling pressure sealing butterfly valve - Google Patents
From filling pressure sealing butterfly valve Download PDFInfo
- Publication number
- CN105090538B CN105090538B CN201510588892.6A CN201510588892A CN105090538B CN 105090538 B CN105090538 B CN 105090538B CN 201510588892 A CN201510588892 A CN 201510588892A CN 105090538 B CN105090538 B CN 105090538B
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- valve
- valve body
- sealing ring
- hole
- valve rod
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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
- 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
- F16K1/16—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 with pivoted closure-members
- F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
- F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of from filling pressure sealing butterfly valve, including valve body, valve rod, flap and with flap, the sealing ring of sealing pair can be constituted, described sealing ring is the O-ring seal with pressurising chamber, and described sealing ring is arranged on valve body by side pressure lid；Valve body is provided with the valve body liquid-through hole led to pressurising chamber, valve body is additionally provided with the valve body leakage opening led to valve outlet chamber；Being provided with rotating control bar in valve rod, be provided with feed pathway on valve rod and control bar, described valve body liquid-through hole can be led to valve body snout cavity by this feed pathway；Being additionally provided with drainage passage on valve rod and control bar, described valve body liquid-through hole can be led to valve body leakage opening by drainage passage.The sealing effectiveness of pressurising butterfly valve should can not only be realized from filling pressure sealing butterfly valve, and simple in construction, it is not necessary to external agency pressure system.
Description
Background technology
The present invention relates to a kind of valve, particularly relate to the improvement of a kind of butterfly valve seal structure.
Background technology
Butterfly valve is to drive flap reciprocating rotating about 90 ° to open, cut out or regulate a kind of valve of rate-of flow with valve rod
Door.Its simple in construction, volume are little, lightweight, material consumption saves, installation dimension is little, easy and simple to handle rapidly, are that development is very fast, answer
By one of more valve kind.But owing to butterfly valve is to use the sealing surface on flap excircle and the sealing surface on body cavity
Composition sealing pair, utilizes the sealing pair elastic element elastic deformation produced that is squeezed to ensure to seal, thus at valve opening
With closing process exists bigger friction, sealing surface is the most impaired, causes seal failure；Flexible member in sealing pair simultaneously
Inevitably it is plastically deformed after using a period of time, will also result in the inefficacy of sealing.Therefore, the sealing effect of butterfly valve
The most not ideal, under conditions of mostly only can be used in mesolow.
The appearance of filling pressure sealing butterfly valve makes the above-mentioned existing problems of butterfly valve be greatly improved, and it is at the bullet of sealing pair
On property element, pressurising chamber is set, when flap turns to closed position, in utilizing external agency pressurising chamber on flexible member
Pressurising, makes sealing pair be in close contact, thus ensures the sealing of butterfly valve, before butterfly valve is opened, sheds the external pressure in pressurising chamber,
Thus reduce the operational torque of butterfly valve.But, this kind of filling pressure sealing butterfly valve needs a set of external agency pressure system to remain close
Envelope effect, thus structure is complicated, cost is high, and actual application is the most extensive.
Summary of the invention
For the above-mentioned deficiency existing for prior art, the technical problem to be solved is to provide a kind of from pressurising
Sealed butterfly valve, it can not only realize the sealing effectiveness of pressurising butterfly valve, and simple in construction, it is not necessary to external agency pressure system.
In order to solve above-mentioned technical problem, the one of the present invention from filling pressure sealing butterfly valve, including valve body, valve rod, flap and
Can be with the sealing ring of flap composition sealing pair, described sealing ring is the O-ring seal with pressurising chamber, and described sealing ring passes through
Side pressure lid is arranged on valve body；Valve body is provided with the valve body liquid-through hole led to pressurising chamber, valve body is additionally provided with
The valve body leakage opening that valve outlet chamber is led to；In valve rod, it is provided with rotating control bar, valve rod and control bar are provided with
Feed pathway, described valve body liquid-through hole can be led to valve body snout cavity by this feed pathway；Valve rod and control bar also set
Being equipped with drainage passage, described valve body liquid-through hole can be led to valve body leakage opening by drainage passage.
In said structure, owing to described sealing ring is the O-ring seal with pressurising chamber, described sealing ring passes through side
Gland is arranged on valve body, then should can realize filling pressure sealing function with the O-ring seal in pressurising chamber, and this sealing ring leads to
Crossing that side pressure lid is arranged on valve body can be so that the fixing and working service of sealing ring；Again owing to being provided with on valve body and pressurising
The valve body liquid-through hole that chamber is led to, is additionally provided with the valve body leakage opening led to valve outlet chamber, the most described sealing ring on valve body
Can carry out the pressurising medium for entering pressurising chamber by the valve body liquid-through hole on valve body and provide pressurizing channel, the valve body on valve body is let out
Fluid apertures can provide drainage passage by the pressure liquid being filled with in sealing ring pressurising chamber；Rotating owing to being provided with in valve rod again
Controlling bar, be provided with feed pathway on valve rod and control bar, described valve body liquid-through hole can be entered with valve body by this feed pathway
Oral cavity is led to, then the medium in valve body snout cavity can be led to pressurising chamber by feed pathway, thus utilizes the pressure medium to be
The pressurising chamber pressurising of sealing ring, makes the sealing effectiveness of butterfly valve be guaranteed, and when the media operation pressure in snout cavity is the biggest
Time, the pressure in pressurising chamber is the highest, and the sealing effectiveness of butterfly valve is the best, is particularly suitable for butterfly valve and is used in elevated pressures
Service condition in pipeline, so, the butterfly valve of the present invention carries out filling pressure sealing by the pressure in pipeline, it is no longer necessary to outside configuration
Portion's pressure medium system, simple in construction, easy to use, feed pathway can be by controlling the rotation of bar and break-make easily；Also
Owing to being additionally provided with drainage passage on valve rod and control bar, described valve body liquid-through hole can be by drainage passage and valve body leakage opening
Lead to, then, when valve opened by needs, the pressure medium in pressurising chamber can be made in sealing ring from drainage passage by controlling bar
Inside releasing, make the release of pressurising chamber, between sealing ring and flap, sealing pair contact reduces, and is in trace interference or exists a small amount of
Gap state, rotation valve rod just can open valve, sealing pair friction during valve opening and closing and extruding all easily
Becoming the least, sealing ring and the service life of valve all can be longer.
A kind of preferred embodiment of the present invention, the described sealing ring cross section with pressurising chamber takes the shape of the letter U, the opening part of U-shaped
In sealing ring outer ring, the sealing ring inner chamber of the annular in U-shaped cross section is pressurising chamber.Use this embodiment, the sealing ring in U-shaped cross section
Simple in construction, easily manufactured, and after pressurising, expansion effect is obvious, is conducive to improving sealing effectiveness.
The another kind of preferred embodiment of the present invention, installs on described side pressure lid and valve body and stays between the side of sealing ring
Having axial gap, installing the side of sealing ring on valve body, to be provided with the annular corresponding with sealing ring respective side shape recessed
Groove；The side covering installation sealing ring in side pressure is provided with the annular groove corresponding with sealing ring respective side shape.Use
This embodiment, sealing ring is effectively fixedly mounted, and the profile of sealing ring will not change after installing, also will not be due to
Pressurising pressure and change installation site, it is ensured that reliably carrying out of filling pressure sealing.
Another preferred embodiment of the present invention, position corresponding with described axial gap on valve body is provided with ring
Shape groove, described valve body liquid-through hole is led to pressurising chamber by this annular ditch groove and axial gap.Use this embodiment, pressurising
360 degree can be realized by the axial gap between side pressure lid and valve body and the annular ditch groove on valve body between chamber and valve body liquid-through hole
Comprehensive leading to, simple in construction, pressurising efficiency is high.
Further preferred embodiment of the present invention, described valve body leakage opening is gone out with valve body by the hole on the wall of side pressure lid
Oral cavity is led to.Use this embodiment, valve body leakage opening can be facilitated implementation and lead to valve outlet chamber, easy to process.
Another further preferred embodiment of the present invention, described feed pathway includes that be arranged on valve rod enters with valve body
Valve rod liquid-through hole that the inlet opening that oral cavity is led to is corresponding with valve body liquid-through hole position and being arranged at control on bar connect into
Fluid apertures and the control bar inlet opening of valve rod liquid-through hole.Using this embodiment, feed pathway is by valve rod and the hole group controlled on bar
Close and constitute, the break-make of feed liquor passage can be conveniently realized by rotation control rod, it is simple to pressurising controls.
The another further preferred embodiment of the present invention, described drainage passage includes valve rod liquid-through hole, is arranged at valve rod
On the valve rod leakage opening corresponding with valve body leakage opening position and be arranged at the connected valve rod liquid-through hole and valve controlled on bar
The control bar leakage opening of bar leakage opening.This embodiment, valve rod liquid-through hole is used to have feed liquor and drainage function concurrently so that sealing ring
Pressurising and release transfer process valve rod, without action, only can be realized pressurising and the release conversion of sealing ring, meet by control bar
The concerns mandate of flap opening-closing process and sealing pair seal pressure.
The present invention further preferred embodiment, is arranged between valve body and valve rod and between valve rod and control bar
There are some seals.Use this embodiment, can suitably reduce the manufacture essence that valve body cooperates with control bar with valve rod, valve rod
Degree requirement, it is ensured that do not lead to mutually between feed liquor and drainage process feed pathway and drainage passage, valve filling pressure sealing function just
Often realize.
Accompanying drawing explanation
With specific embodiment, the present invention is described in further detail from filling pressure sealing butterfly valve below in conjunction with the accompanying drawings.
Fig. 1 is the present invention structural representation from a kind of detailed description of the invention of filling pressure sealing butterfly valve；
The amplification signal sealed when Fig. 2 is flap closed mode in structure shown in Fig. 1 and control under bar position pressurising state
Figure；
Fig. 3 is to control the drawing in side sectional elevation at inlet opening position on bar and valve rod in structure shown in Fig. 2；
The amplification signal sealed when Fig. 4 is flap closed mode in structure shown in Fig. 1 and control under the depressurization phase of bar position
Figure；
Fig. 5 is to control bar and the drawing in side sectional elevation at valve rod upper valve rod liquid-through hole position in structure shown in Fig. 4；
Seal and control the enlarged diagram at bar position when Fig. 6 is flap open mode in structure shown in Fig. 1.
In figure: 1-valve body, 2-control bar, 3-sealing ring, 4-flap, 5-valve rod, 6-valve body snout cavity, 7-valve
Body outlet plenum, 8-side pressure lid, 9-seal, 10-control bar inlet opening, 11-inlet opening, 12-valve rod leakage opening, 13-
Valve body leakage opening, 14-valve rod liquid-through hole, 15-valve body liquid-through hole, 16-annular ditch groove, 17-axial gap, 18-pressurising
Chamber, 19-control bar leakage opening.
Detailed description of the invention
Shown in Fig. 1 in filling pressure sealing butterfly valve, valve body 1 is cast form part, and the right chamber of valve body 1 is that valve body enters
Oral cavity 6, valve body snout cavity 6 is led to water influent pipeline by the flange in aperture, and the left chamber of valve body 1 is valve outlet chamber 7, valve
Body outlet plenum 7 is led to drain pipe road by the flange in aperture, passes valve body wall on the upside of valve body 1 and be provided with valve in the middle part of valve body 1
Bar 5, valve rod 5 rotatable support is on the valve body wall up and down of valve body 1, and valve rod 5 is passed through hand by the worm-and-wheel gear outside valve body 1
Wheel drive, is fixedly connected with flap 4 on valve body 5, and flap 4 is in the form of annular discs, and flap 4 rotates with valve rod 5 and makes valve opening and closing, when
When flap 4 is closed, the sealing surface on flap 4 constitutes sealing pair with sealing ring 3 and makes valve airtight, and sealing ring 3 leads to
Cross the side pressure lid 8 being installed in valve outlet chamber 7 to be arranged on valve body 1.
As in figure 2 it is shown, sealing ring 3 is the O-ring seal with pressurising chamber 18, its cross section takes the shape of the letter U, and the opening of U-shaped is in
Sealing ring 3 outer ring, sealing ring 3 inner chamber of the annular in U-shaped cross section is pressurising chamber 18；The side installing sealing ring 3 on valve body 1 sets
Being equipped with the annular groove corresponding with sealing ring 3 respective side shape, the side installing sealing ring 3 on side pressure lid 8 is provided with
Install on the annular groove corresponding with sealing ring 3 respective side shape, side pressure lid 8 and valve body 1 and stay between the side of sealing ring 3
Having axial gap 17, this axial gap 17 is corresponding with the pressurising chamber 18 of sealing ring 3 leads to.With described axial gap on valve body 1
17 corresponding positions are provided with annular ditch groove 16, are provided with valve body liquid-through hole 15 on valve body 1, and valve body liquid-through hole 15 passes through ring
Shape groove 16 and axial gap 17 are led to pressurising chamber 18.Valve body 1 is additionally provided with valve body leakage opening 13, valve body leakage opening 13
Being in the lower section of valve body liquid-through hole 15, valve body leakage opening 13 is led to valve outlet chamber 7 by the hole on the wall of side pressure lid 8.
Inside valve rod 5 lower end, it is provided with rotating control bar 2, controls bar 2 lower end and pass the valve body wall on the downside of valve body 1,
Controlling bar 2 lower end is that the operation controlling bar 2 connects end, control bar 2 can be driven to rotate, certainly from valve body 1 outside by spanner
Control bar 2 can also be made to rotate by pneumatic, hydraulic pressure or electric driving mechanism.Valve rod 5 and control bar 2 are provided with feed liquor lead to
Road, this feed pathway includes the inlet opening 11 led to valve body snout cavity 6 and the valve body liquid-through hole 15 being arranged on valve rod 5
The control bar putting corresponding valve rod liquid-through hole 14 and be arranged at connected the inlet opening 11 and valve rod liquid-through hole 14 controlled on bar 2
Inlet opening 10, so, valve body liquid-through hole 15 just can be led to valve body snout cavity 6 by this feed pathway, correspondingly, sealing ring
Pressurising chamber 18 in 3 just can be led to valve body snout cavity 6, thus utilizes the fluid pressure in valve body snout cavity 6 voluntarily to filling
Pressure chamber 18 pressurising, makes butterfly valve obtain good sealing effectiveness.Filling between flap 4 and sealing ring 3 when valve is in the closed position
As shown in Figure 2 and Figure 3, wherein Fig. 3 is for controlling bar 2 and valve rod 5 at feed liquor for the position relationship of pressure condition lower valve rod 5 and control bar 2
The schematic cross section at position, hole 11.
As shown in Figure 4, being additionally provided with drainage passage on valve rod 5 and control bar 2, this drainage passage includes valve rod liquid-through hole
14, the valve rod leakage opening 12 corresponding with valve body leakage opening 13 position that be arranged on valve rod 5 and being arranged at control on bar 2 can
Connection valve rod liquid-through hole 14 and the control bar leakage opening 19 of valve rod leakage opening 12, control bar leakage opening 19 and control bar inlet opening 10
Position circumferentially misplace 90 degree, so, after making control bar 2 rotate 90 degree, valve body liquid-through hole 15 just can by valve rod 5 and
Control the drainage passage on bar 2 and valve body leakage opening 13 leads to valve outlet chamber 7, so that pressurising chamber 18 release, after release
Sealing ring 3 and flap 4 between sealing pair contact reduce, be in trace interference or there is a small amount of gap state, being rotated further by
Valve rod 5 just can open valve easily.When valve is in the closed position between flap 4 and sealing ring 3 under depressurization phase
As shown in figs. 4 and 5, wherein Fig. 5 is for controlling bar 2 and valve rod 5 at valve rod liquid-through hole 14 for the position relationship of valve rod 5 and control bar 2
The schematic cross section at position.
Fig. 6 shows when valve is in an open position between flap 4 and sealing ring 3 and valve rod 5 and controlling between bar 2
Position relationship.Valve is 90 degree from flap 4 closed mode to open mode hard-over, when flap 4 turns under the drive of valve rod 5
When dynamic certain angle is in open mode, between valve body liquid-through hole 15 and valve body leakage opening 13 and valve rod 5, it is in closure state, valve
Lobe 4 opening procedure controls bar 2 rotate with valve rod 5, control the relative position between bar 2 and valve rod 5 and keep constant.
It is provided with some seals 9 between valve body 1 and valve rod 5 and between valve rod 5 and control bar 2, so can be suitable
Reduce valve body 1 and valve rod 5, valve rod 5 and control the accuracy of manufacture requirement cooperated between bar 2, it is ensured that feed liquor and drainage process
Do not lead to mutually between feed pathway and drainage passage.
Below only list certain specific embodiments of the invention, but the present invention is not limited to this, it is also possible to make
More improvement and conversion.Take the shape of the letter U as the cross section of described sealing ring 3 may not be, but can in other shape, as long as
With pressurising chamber 18 can be with the sealing surface of the flap 4 suitable sealing pair of composition；Described control bar leakage opening 19 and control
The position of bar inlet opening 10 circumferentially may not be and misplaces 90 degree, but can misplace 120 degree or other angle；Described control
Detent mechanism can also be set between bar 2 processed and valve rod 5 or on valve body 1, control the position near bar 2 position mark is set, with
It is easy to control operation.And so on, as long as improvement done on the basis of its general principles and conversion, it is regarded as
Fall within the scope of protection of the present invention.
Claims (8)
1. from a filling pressure sealing butterfly valve, including valve body (1), valve rod (5), flap (4) and with flap (4), sealing pair can be constituted
Sealing ring (3), it is characterised in that: described sealing ring (3) is the O-ring seal with pressurising chamber (18), described sealing ring (3)
It is arranged on valve body (1) by side pressure lid (8)；Valve body (1) is provided with the valve body liquid-through hole led to pressurising chamber (18)
(15), valve body (1) is additionally provided with the valve body leakage opening (13) led to valve outlet chamber (7)；Being provided with in valve rod (5) can
The control bar (2) rotated, is provided with feed pathway on valve rod (5) and control bar (2), and described valve body liquid-through hole (15) can be passed through
This feed pathway is led to valve body snout cavity (6)；Valve rod (5) and control bar (2) are additionally provided with drainage passage, described valve body
Liquid-through hole (15) can be led to valve body leakage opening (13) by drainage passage.
It is the most according to claim 1 from filling pressure sealing butterfly valve, it is characterised in that: the described sealing ring with pressurising chamber (18)
(3) cross section takes the shape of the letter U, and the opening of U-shaped is in sealing ring (3) outer ring, and sealing ring (3) inner chamber of the annular in U-shaped cross section is pressurising chamber
(18).
It is the most according to claim 1 from filling pressure sealing butterfly valve, it is characterised in that: on described side pressure lid (8) with valve body (1)
Installing and leave axial gap (17) between the side of sealing ring (3), the side installing sealing ring (3) on valve body (1) is provided with
The annular groove corresponding with sealing ring (3) respective side shape；The side installing sealing ring (3) on side pressure lid (8) is arranged
There is the annular groove corresponding with sealing ring (3) respective side shape.
It is the most according to claim 3 from filling pressure sealing butterfly valve, it is characterised in that: the upper and described axial gap at valve body (1)
(17) corresponding position is provided with annular ditch groove (16), and described valve body liquid-through hole (15) is by this annular ditch groove (16) and axially
Gap (17) is led to pressurising chamber (18).
It is the most according to claim 1 from filling pressure sealing butterfly valve, it is characterised in that: described valve body leakage opening (13) passes through side pressure
Hole on the wall of lid (8) is led to valve outlet chamber (7).
It is the most according to claim 1 from filling pressure sealing butterfly valve, it is characterised in that: described feed pathway includes being arranged at valve rod
(5) the valve rod liquid-through hole corresponding with valve body liquid-through hole (15) position with the inlet opening (11) that valve body snout cavity (6) leads on
(14) with control bar inlet opening (10) being arranged at connected inlet opening (11) and the valve rod liquid-through hole (14) controlled on bar (2).
It is the most according to claim 1 from filling pressure sealing butterfly valve, it is characterised in that: described drainage passage includes valve rod liquid-through hole
(14) the valve rod leakage opening (12) corresponding with valve body leakage opening (13) position that, be arranged on valve rod (5) and be arranged at control
Connected valve rod liquid-through hole (14) on bar (2) and control bar leakage opening (19) of valve rod leakage opening (12).
The most according to claim 1 from filling pressure sealing butterfly valve, it is characterised in that: between valve body (1) and valve rod (5) and
It is provided with some seals (9) between valve rod (5) and control bar (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510588892.6A CN105090538B (en) | 2015-09-17 | 2015-09-17 | From filling pressure sealing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510588892.6A CN105090538B (en) | 2015-09-17 | 2015-09-17 | From filling pressure sealing butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105090538A CN105090538A (en) | 2015-11-25 |
| CN105090538B true CN105090538B (en) | 2016-08-24 |
Family
ID=54571580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510588892.6A Active CN105090538B (en) | 2015-09-17 | 2015-09-17 | From filling pressure sealing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105090538B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410563B (en) * | 2019-08-26 | 2024-05-03 | 上海冠龙阀门节能设备股份有限公司 | Intelligent worm gear manual butterfly valve |
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|---|---|---|---|---|
| CN102748484A (en) * | 2012-07-23 | 2012-10-24 | 岳阳筑盛阀门管道有限责任公司 | Angle type drain valve |
| CN202561074U (en) * | 2012-02-13 | 2012-11-28 | 石特阀门股份有限公司 | Bidirectional rigid sealing butterfly valve |
| CN202852004U (en) * | 2012-11-12 | 2013-04-03 | 程汉章 | Triple eccentric hard seal butterfly valve |
| CN104847908A (en) * | 2014-11-22 | 2015-08-19 | 奉化市智新仪表科技有限公司 | Seal butterfly valve with internal channel inflated with air |
| RU2563792C2 (en) * | 2010-04-30 | 2015-09-20 | Фишер Контролз Интернешнел Ллс | Ball valve sealing assembly and ball valve containing it |
| CN204922041U (en) * | 2015-09-17 | 2015-12-30 | 东台市远洋船舶配件有限公司 | From pressurizing sealed butterfly valve |
-
2015
- 2015-09-17 CN CN201510588892.6A patent/CN105090538B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2563792C2 (en) * | 2010-04-30 | 2015-09-20 | Фишер Контролз Интернешнел Ллс | Ball valve sealing assembly and ball valve containing it |
| CN202561074U (en) * | 2012-02-13 | 2012-11-28 | 石特阀门股份有限公司 | Bidirectional rigid sealing butterfly valve |
| CN102748484A (en) * | 2012-07-23 | 2012-10-24 | 岳阳筑盛阀门管道有限责任公司 | Angle type drain valve |
| CN202852004U (en) * | 2012-11-12 | 2013-04-03 | 程汉章 | Triple eccentric hard seal butterfly valve |
| CN104847908A (en) * | 2014-11-22 | 2015-08-19 | 奉化市智新仪表科技有限公司 | Seal butterfly valve with internal channel inflated with air |
| CN204922041U (en) * | 2015-09-17 | 2015-12-30 | 东台市远洋船舶配件有限公司 | From pressurizing sealed butterfly valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105090538A (en) | 2015-11-25 |
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