CN104712772B - A kind of low flow resistance stop valve of two way seal - Google Patents
A kind of low flow resistance stop valve of two way seal Download PDFInfo
- Publication number
- CN104712772B CN104712772B CN201510035921.6A CN201510035921A CN104712772B CN 104712772 B CN104712772 B CN 104712772B CN 201510035921 A CN201510035921 A CN 201510035921A CN 104712772 B CN104712772 B CN 104712772B
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- valve
- flap
- valve pocket
- outlet
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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
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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
- F16K1/32—Details
-
- 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
- F16K1/36—Valve members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The present invention provides a kind of two way seal low flow resistance stop valve, including valve casing, flap, valve rod, actuator, there is in valve casing valve pocket, valve pocket has two ports of inlet and outlet, the inlet and outlet of valve pocket is oppositely arranged, respectively positioned at the both sides of valve pocket, flap includes two, flap is arranged in the valve pocket of valve casing, valve rod one end is connected with the actuator outside valve pocket, actuator has driving force, the valve rod other end is stretched in valve pocket and is connected with two flaps respectively, the import respectively with valve pocket of two flaps, outlet coordinates the import of valve pocket, outlet closing is opened, when two flaps are opened in place, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed.By arranging the inlet and outlet that two flaps distinguish corresponding matching valve pocket in valve pocket so that stop valve being capable of two way seal.When two flaps are opened in place, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed, and flap does not hinder the flowing of fluid, it is achieved thereby that low flow resistance.
Description
Technical field
The present invention relates to the low flow resistance stop valve of a kind of stop valve, especially a kind of two way seal, belongs to valve field.
Background technology
As the subject matter that current stop valve is present is that flow resistance is higher, and it is not suitable for reversely sealing use, it is especially high
Pressure cutoff valve, sealing force are all from actuator (except reversely sealing), higher to the performance requirement of actuator, therefore
Need a kind of low flow resistance and can two way seal stop valve.
In view of this it is special to propose the present invention.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, there is provided a kind of low flow resistance of two way seal is cut
Only valve, can realize low flow resistance, and can realize two way seal so that the better reliability of sealing.
To solve above-mentioned technical problem, the present invention using the basic conception of technical scheme is：
A kind of low flow resistance stop valve of two way seal, including valve casing, flap, valve rod, valve casing include valve gap and valve body, valve gap with
Valve body is connected and encloses to form a valve pocket, and valve body is provided with the inlet and outlet connected with valve pocket, during valve gap is provided with
Empty valve neck is connected with valve pocket, and valve rod one end is passed into valve pocket from valve neck, valve rod stretch into one end in valve pocket respectively with two
Flap connects, and the import respectively with valve pocket of two flaps, outlet coordinate the import of valve pocket, outlet closing or open.
Further, when two flaps are opened in place, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed.
Further, valve pocket both sides are relatively set with two ports of inlet and outlet, and each flap is cut with scissors with valve casing inwall
Connect, two flaps under valve rod traction around each close off or open with the rotation of the pin joint of valve casing inwall valve pocket import,
Outlet.
Further, connected by connecting rod between valve rod and flap.
Further, valve neck is located at the central axis upright of the middle part of valve pocket, the central axis of valve neck and the import of valve pocket
It is intersecting.
Further, connection valve rod is different from two length of connecting rods of two flaps, and valve neck central axis is from shorter company
The port of the valve pocket joined together by the flap of bar connection is near, the valve joined together by flap of the valve neck central axis from longer connecting rod connection
The port in chamber is remote, ensures that in valve rod action the valve pocket port being engaged can be closed by two flaps.
Further, flap and valve casing inwall be by hinge, and the pin-and-hole for placing bearing pin is Long Circle hole, and bearing pin can be
In pin-and-hole along away from --- be close to valve rod central axis direction movement, be better achieved sealing and borrow power sealing.
Further, between connecting rod and valve rod by hinge, the pin-and-hole for placing bearing pin is Long Circle hole, and bearing pin can be
In pin-and-hole along away from --- be close to valve rod central axis direction movement.
Further, check valve is provided with flap.
Further, one end of flap is hinged with valve gap inwall, and cone cone space of the bottom towards valve pocket is provided with valve gap,
Cone space is located at the outside of the runner that the inlet and outlet of valve pocket is formed, flap around this pin joint rotarily open when, taper is empty
Between accommodate the connecting rod that is connected with flap.
After above-mentioned technical proposal, the present invention is had the advantages that compared with prior art.
A kind of low flow resistance stop valve of two way seal of the present invention, distinguishes corresponding matching valve by arranging two flaps in valve pocket
The inlet and outlet in chamber so that stop valve being capable of two way seal.Valve pocket has two ports of inlet and outlet, the import of valve pocket and
Outlet is oppositely arranged, respectively positioned at the both sides of valve pocket, therefore, inlet and outlet on same axis, open and arrive by two flaps
During position, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed, i.e. flap and is located at inlet wall and exit wall line shape
Into the virtual tubulose runner in valve pocket outside, therefore, flap does not hinder the flowing of fluid, it is achieved thereby that low stream
Resistance.
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail.
Description of the drawings
Fig. 1 is a kind of flap of the low flow resistance stop valve of two way seal in the embodiment of the present invention one under opening
Structural representation.
Fig. 2 is under a kind of flap of the low flow resistance stop valve of two way seal in the embodiment of the present invention one is closed
Structural representation.
Fig. 3 is a kind of flap of the low flow resistance stop valve of two way seal in the embodiment of the present invention two under opening
Structural representation.
Fig. 4 is under a kind of flap of the low flow resistance stop valve of two way seal in the embodiment of the present invention two is closed
Structural representation.
Partial enlarged drawings of the Fig. 5 for Fig. 2.
1st, valve body 2, valve gap 3, valve neck 4, valve rod 5, actuator 6, sealing 7, bearing pin 8, connecting rod 91, the first valve
Lobe 92, the second flap 10, check valve 11, import 12, outlet.
Specific embodiment
Embodiment one
As shown in figure 1, a kind of low flow resistance stop valve of two way seal, including valve casing, flap, valve rod, actuator, in valve casing
With valve pocket, valve pocket has two ports of inlet and outlet, and the inlet and outlet of valve pocket is symmetrically oppositely arranged, respectively positioned at valve
The both sides in chamber.
Valve casing includes valve gap 2 and valve body 1, and valve gap 2 is connected and encloses to form a valve pocket, valve gap and valve with valve body 1
Pass through flange, bolt connection between body.Valve body 1 is provided with the inlet and outlet connected with valve pocket, and valve gap 2 is provided with hollow valve neck
3 are connected with valve pocket, and 4 one end of valve rod is passed into valve pocket from valve neck 3.
4 one end of valve rod is connected with the actuator 5 outside valve pocket, and actuator 5 has driving force, 4 other end of valve rod
Stretch into and be connected in valve pocket and respectively with two flaps in valve pocket, the import respectively with valve pocket of two flaps, export and match somebody with somebody
Close the import of valve pocket, outlet closing or open, when two flaps are opened in place, flap is located at the inlet and outlet of valve pocket and is formed
Runner outside.
Each flap is hinged with valve casing inwall, and two flaps are under valve rod traction around pin joint each with valve casing inwall
Rotation closes off or opens the import of valve pocket, outlet.
Connected by connecting rod 8 between valve rod 4 and flap, be hinged by bearing pin 7 between connecting rod 8 and flap, connecting rod 8 and valve rod
It is hinged by bearing pin 7 between 4.
Valve neck 3 is located at the middle part of valve pocket, the central axis upright phase of the central axis of valve neck 3 and the inlet and outlet of valve pocket
Hand over.
As shown in Fig. 2,5, by hinge between connecting rod and valve rod, the pin-and-hole for placing bearing pin is Long Circle hole, bearing pin
Can in pin-and-hole along away from --- be close to valve rod central axis direction movement.Flap, is put by hinge with valve casing inwall
Put bearing pin pin-and-hole be Long Circle hole, bearing pin can in pin-and-hole along away from --- be close to valve rod central axis direction movement.It is long
The setting of circular port can make up mismachining tolerance and using abrasion, make flap exist along valve pocket import, export center axis direction
Can move freely in certain limit, to realize sealing and by means of the advantage of power sealing.
When having liquid in the valve pocket, the pressure of liquid produces certain active force to two flaps, makes two flaps point
Do not coordinate tight with valve pocket inlet and outlet, realize sealing by means of power.
In the present embodiment, one end of flap is hinged by bearing pin, pin-and-hole with 2 inwall of valve gap, and cone bottom is provided with valve gap 2
Towards the cone space of valve pocket.Connecting rod 8 is hinged by bearing pin 7 and flap, and pin joint is located at flap with valve pocket port mating surface
The back side.The length for connecting the connecting rod of two flaps respectively is identical.
By flange, bolt connection between valve gap and valve body, so, when repair and maintenance is needed, only bolt need to be laid down,
Flap can be removed with valve gap, be maintained easily.
As shown in figure 1, actuator 5 is moved with ovable valve stem 4, one end that valve rod 4 is connected with connecting rod 8 is transported to 3 direction of valve neck
It is dynamic, so as to drivening rod motion further drives flap to rotate around its pin joint with valve gap 2.After flap is opened in place, connecting rod 8
In the cone space of valve gap 2, face and the centerline axis parallel of valve pocket port that flap is coordinated with valve pocket port, and flap
The outside of the runner formed positioned at the inlet and outlet of valve pocket, i.e. flap are located at what the inlet wall and exit wall line of valve pocket was formed
The outside of the virtual tubulose runner in valve pocket, therefore, flap does not hinder the flowing of fluid, it is achieved thereby that low flow resistance.
As shown in Fig. 2 actuator 5 is moved with ovable valve stem 4, one end that valve rod 4 is connected with connecting rod 8 is to away from valve neck 3
Direction is moved, and so as to drivening rod motion and then drives the pin joint of flap around which with valve gap 2 to rotate, make two flaps respectively with
The inlet and outlet of valve pocket coordinates, by the import of valve pocket, outlet closing.When connecting rod at an angle after can realize self-locking tie
Structure, the power for being now not carried out mechanism can also make flap close valve pocket inlet and outlet, are applicable to power-off, die, hold
The important events such as replacing online of row mechanism.
Check valve is provided with flap.As shown in Figure 1, 2, in the present embodiment, the port on the left of valve pocket is outlet 12, valve
Port on the right side of chamber is import 11, and correspondingly, the first flap 91 is coordinated with outlet 12, and the second flap 92 is coordinated with import 11.
First flap 91 is provided with check valve 10.When check valve is low temperature liquid medium for the medium circulated in stop valve, valve is prevented
Heat up to build the pressure and cause danger in intracavity portion.When heating up in valve pocket and then pressure increases, the check valve 10 on the first flap 91 can enter
Row pressure release.
A kind of low flow resistance stop valve of two way seal of the present invention, distinguishes corresponding matching valve by arranging two flaps in valve pocket
The inlet and outlet in chamber so that stop valve being capable of two way seal.Valve pocket has two ports of inlet and outlet, the import of valve pocket and
Outlet is oppositely arranged, respectively positioned at the both sides of valve pocket, therefore, inlet and outlet on same axis, open and arrive by two flaps
During position, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed, i.e. flap and is located at inlet wall and exit wall line shape
Into the virtual tubulose runner in valve pocket outside, therefore, flap does not hinder the flowing of fluid, it is achieved thereby that low stream
Resistance.
Embodiment two
The present embodiment with the difference of embodiment one is：As shown in Figure 3,4, two connecting rods of valve rod and two flaps are connected
Length is different, close to the port of the valve pocket joined together by flap of the valve neck central axis from shorter connecting rod connection, valve neck central axis
Away from the port of the valve pocket joined together by the flap that longer connecting rod connects, ensure that two flaps will can match in valve rod action
The valve pocket port closing of conjunction.That is the connecting rod of connection valve rod and the first flap 91 is longer than the connecting rod of connection valve bar and the second flap 92,
First flap 91 is coordinated with outlet 12, and the second flap 92 is coordinated with import 11, and valve neck central axis separates out mouth 12 farther out, and from entering
Mouth 11 is nearer.
, by hinge, the pin-and-hole for placing bearing pin is Long Circle hole for flap and valve casing inwall, bearing pin can in pin-and-hole edge
The direction movement of valve rod is close to away from central axis.By hinge between connecting rod and valve rod, the pin-and-hole for placing bearing pin is length
Circular port, bearing pin can in pin-and-hole along away from --- be close to valve rod central axis direction movement.
One end of flap is hinged with valve gap inwall, and the cone space for accommodating connecting rod and flap is provided with valve gap.
As shown in figure 3, actuator 5 is moved with ovable valve stem 4, one end that valve rod 4 is connected with connecting rod 8 is transported to 3 direction of valve neck
It is dynamic, so as to drivening rod motion further drives flap to rotate around its pin joint with valve gap 2.Due to two length of connecting rods,
When valve rod lifts connecting rod upwards, when pin joint of second flap 92 around which with valve gap 2 rotates the anglec of rotation than the first flap 91 around
When which is rotated with the pin joint of valve gap 2, the anglec of rotation is bigger, therefore, after flap is opened in place, connecting rod 8 is located at the cone of valve gap 2
In shape space, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed, i.e. flap and is located at the inlet wall of valve pocket and goes out
The outside of the virtual tubulose runner in valve pocket that mouthful wall line is formed, and the face that coordinates with valve pocket port of the first flap 91 with
The centerline axis parallel of valve pocket port, and the second flap 92 is then oblique is contained in the cone space of valve gap.Therefore, flap does not hinder
Hinder the flowing of fluid, it is achieved thereby that low flow resistance.Due to two length of connecting rods, when two flaps are opened in place, first
Flap is located at face and the valve pocket that the outside of the runner that the inlet and outlet of valve pocket is formed and the first flap 91 are coordinated with valve pocket port
During the centerline axis parallel of port, the second flap 92 and the connecting rod being attached thereto then are shunk in the cone space of valve gap, therefore are bored
The part of wall in shape space is outwards recessed, and company of the concave shaped space to accommodate the second flap 92 and be attached thereto is formed on its wall
Bar.
As shown in Figure 3,4, in the present embodiment, the port on the left of valve pocket is outlet 12, and the port on the right side of valve pocket is import
11, correspondingly, the first flap 91 is coordinated with outlet 12, and the second flap 92 is coordinated with import 11.Due to what is be connected with the first flap
Length of connecting rod, the connecting rod being connected with the second flap are short, drive 4 drivening rod action of valve rod in actuator 5 and then drive flap to move
When making, the outlet joined together by the first flap can first be opened, first be closed, and the import joined together by the second flap is opened after the meeting, closed afterwards
Close.
When the inlet and outlet of valve pocket is closed, the first flap first closes outlet, and import is closed after the second flap, then from entering
The fluid for mouthful entering valve pocket can promote the first flap 91 to close outlet, and the steering force required for whole closing process can lack, can be with
It is laborsaving.And when the inlet and outlet of valve pocket is opened, the first flap 91 first opens outlet 12, after the second flap 92, import is opened
11, then when the first flap is opened, required power is less, can be with laborsaving.
Check valve 10 is provided with the first flap 91.The medium that check valve is used to circulate in stop valve is low temperature liquid medium
When, prevent from heating up to build the pressure inside valve pocket causing danger.It is when heating up in valve pocket and then pressure increases, unidirectional on the first flap 91
Valve 10 can carry out pressure release.In other embodiments, it is also possible to which the second flap 92 is provided with check valve again as needed.
In other embodiments, can by will be above-mentioned setting oppositely arranged, by with the flap being connected compared with long connecting rod with
Import coordinates, and coordinates with outlet with the flap being connected compared with short connecting rod.Then, the import of valve pocket can first be opened, first be closed, and valve pocket
Outlet open after the meeting, close afterwards.
When valve pocket is opened, the import of valve pocket is first opened, valve pocket pressure and valve pocket pressure progressively reach balance, and valve pocket goes out
Open after mouthful, valve pocket pressure and downstream pressure progressively reach balance, and as the import of valve pocket is opened in the flap action of valve pocket
With during outlet, flap is all that import first with valve pocket, outlet form a less gap, with flap continuation action gap by
Gradually increase, flow of fluid makes pressure gradually balance, it is to avoid larger impact.
When valve pocket is closed, two flaps first close valve pocket import respectively, close valve pocket outlet afterwards, can be by Jie in valve pocket
More, the reduction valve cavity pressure of matter discharge, is more beneficial for the normal work of valve.
Embodiment in above-described embodiment can be further combined or replace, and embodiment is only to the present invention's
Preferred embodiment is described, and not the spirit and scope of the present invention are defined, without departing from design philosophy of the present invention
Under the premise of, the various changes and modifications that professional and technical personnel in the art are made to technical scheme belong to this
Bright protection domain.
Claims (9)
1. the low flow resistance stop valve of a kind of two way seal, it is characterised in that：Including valve casing, flap, valve rod, valve casing includes valve gap and valve
Body, valve gap are connected and enclose to form a valve pocket with valve body, and valve body is provided with the inlet and outlet connected with valve pocket, valve gap
It is provided with hollow valve neck to connect with valve pocket, valve rod one end is passed into valve pocket from valve neck, valve rod stretches into the one end point in valve pocket
It is not connected with two flaps, the import respectively with valve pocket of two flaps, outlet coordinate the import of valve pocket, outlet closing or beat
Open；
When two flaps are opened in place, flap is located at the outside of the runner that the inlet and outlet of valve pocket is formed.
2. the low flow resistance stop valve of a kind of two way seal according to claim 1, it is characterised in that：Valve pocket both sides are oppositely arranged
There are two ports of inlet and outlet, each flap is hinged with valve casing inwall, two flaps are under valve rod traction around respective and valve
The pin joint rotation of shell inwall closes off or opens the import of valve pocket, outlet.
3. the low flow resistance stop valve of a kind of two way seal according to any one of claim 1-2, it is characterised in that：Valve rod and valve
Connected by connecting rod between lobe.
4. the low flow resistance stop valve of a kind of two way seal according to claim 3, it is characterised in that：Valve neck is located in valve pocket
Portion, the central axis of valve neck are intersected with the central axis upright of the import of valve pocket.
5. the low flow resistance stop valve of a kind of two way seal according to claim 4, it is characterised in that：Connection valve rod and two valves
Two length of connecting rod differences of lobe, close to the port of the valve pocket joined together by flap of the valve neck central axis from shorter connecting rod connection,
Away from the port of the valve pocket joined together by flap of the valve neck central axis from longer connecting rod connection, ensure two valves in valve rod action
The valve pocket port being engaged can be closed by lobe.
6. the low flow resistance stop valve of a kind of two way seal according to claim 5, it is characterised in that：Flap is led to valve casing inwall
Cross hinge, the pin-and-hole for placing bearing pin is Long Circle hole, bearing pin can in pin-and-hole along away from --- be close to valve rod central axis
Direction movement, be better achieved sealing and borrow power sealing.
7. the low flow resistance stop valve of a kind of two way seal according to claim 5, it is characterised in that：Lead between connecting rod and valve rod
Cross hinge, the pin-and-hole for placing bearing pin is Long Circle hole, bearing pin can in pin-and-hole along away from --- be close to valve rod central axis
Direction movement.
8. the low flow resistance stop valve of a kind of two way seal according to any one of claim 1-2, it is characterised in that：On flap
It is provided with check valve.
9. the low flow resistance stop valve of a kind of two way seal according to claim 3, it is characterised in that：One end of flap and valve gap
Inwall is hinged, and cone cone space of the bottom towards valve pocket is provided with valve gap, and cone space is located at the inlet and outlet of valve pocket and is formed
Runner outside, flap around this pin joint rotarily open when, cone space accommodates the connecting rod that is connected with flap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510035921.6A CN104712772B (en) | 2015-01-23 | 2015-01-23 | A kind of low flow resistance stop valve of two way seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510035921.6A CN104712772B (en) | 2015-01-23 | 2015-01-23 | A kind of low flow resistance stop valve of two way seal |
Publications (2)
| Publication Number | Publication Date |
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| CN104712772A CN104712772A (en) | 2015-06-17 |
| CN104712772B true CN104712772B (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510035921.6A Active CN104712772B (en) | 2015-01-23 | 2015-01-23 | A kind of low flow resistance stop valve of two way seal |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300189B (en) * | 2017-07-25 | 2023-07-04 | 浙江浙能绍兴滨海热电有限责任公司 | Coal burning equipment |
| CN108953623B (en) * | 2018-06-28 | 2019-05-31 | 江苏圣泰阀门有限公司 | High pressure gas control valve |
| US20200360875A1 (en) | 2019-05-14 | 2020-11-19 | Sodastream Industries Ltd. | Carbonation machine and a gas canister for a carbonation machine |
| CN110906010A (en) * | 2019-11-19 | 2020-03-24 | 广州市淞滨工程技术有限公司 | Hydraulic opening and closing device with good sealing effect for hydraulic engineering |
| CN111120665A (en) * | 2020-01-20 | 2020-05-08 | 韩国昊 | Two-way stop valve |
| CN112958301B (en) * | 2021-01-26 | 2022-05-10 | 湖南科技大学 | Backflow-preventing external-blocking nozzle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050099172A (en) * | 2004-04-09 | 2005-10-13 | 주식회사 광원테크 | Open-close valve using screw jack stem and double disc |
| CN1831395A (en) * | 2006-01-20 | 2006-09-13 | 白龙山 | Hydraulic double-film ring type sluice valve |
| CN201547264U (en) * | 2009-10-23 | 2010-08-11 | 唐雪珍 | Bivalve moisture-proof valve |
| CN101806363B (en) * | 2010-04-30 | 2011-08-10 | 南京理工大学 | High-pressure high-temperature two-way balance stop valve |
| CN201751637U (en) * | 2010-06-18 | 2011-02-23 | 陈国顺 | Electro-magnetic two-way sealing stop valve |
| CN202451846U (en) * | 2011-12-20 | 2012-09-26 | 季克寅 | Double valve clack large-diameter stop valve |
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Effective date of registration: 20170905 Address after: 100070, No. 1, building 2, 6498 Fu Heng street, Fengtai District Science Town, Beijing, China Co-patentee after: Beijing Institute of Aerospace Testing Technology Patentee after: BEIJING AEROSPACE RATE MECHANICAL & ELECTRICAL ENGINEERING CO., LTD. Address before: 100074, Lane 1, Yungang Tian Town, Beijing, Fengtai District Patentee before: Beijing Institute of Aerospace Testing Technology |
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