CN1699801A - Double seal valve - Google Patents
Double seal valve Download PDFInfo
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- CN1699801A CN1699801A CN 200510067535 CN200510067535A CN1699801A CN 1699801 A CN1699801 A CN 1699801A CN 200510067535 CN200510067535 CN 200510067535 CN 200510067535 A CN200510067535 A CN 200510067535A CN 1699801 A CN1699801 A CN 1699801A
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- valve
- pressure relief
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- double seal
- relief vent
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Abstract
This invention provides a dual-sealing valve, which is used under the condition that the controlled liquid is flowed in double-way, and can realize opening function under less opening power. The dual-sealing valve includes valve body with in-outlet, and two sealing elements disposed in a valve cavity which is in the valve body and matched with the inlet and the outlet. A linkage synchronization unit is disposed between the two sealing elements, and a pressure relieving device is connected between the valve cavity and the in-outlet. The valve reduces not only the opening-closing moment greatly, but also the volume of the outside operation device and the requirement of the power source, thus the operation speed of the valve and the service life of the valve are improved. Moreover, the valve has realized self-dual-sealing in double-way, and achieved no damage rapid switch by the linkage synchronization unit. Thus the reliability of the inside operation of the valve is improved, and the cost of the valve is reduced. This invention applies especially in the environment of large flux and high pressure, which requires good sealing performance, intrinsically safe, and frequently rapid switch.
Description
Technical field
The present invention relates to a kind of valve, the double seal valve that uses in the environment in particular for the controlled fluid two-way flow.
Background technique
Common valve has gate valve, flap type and three kinds of basic structure types of butterfly valve in the existing industry, for large-scale program-controlled valve, because valve plate pressure is very huge, for example: pipe diameter=400mm, pressure=25kg/cm
2, then valve plate pressure is about 30000KG.Therefore, the leading indicator of weighing its performance has four: action and modulability, sealing, reliability and valve resistance.
1, for action and modulability: the structure type of valve and working principle thereof have determined the limit that These parameters can reach.Gate valve main resistance in the valve switch process derives from the surface friction drag of valve plate and sealing surface; The main resistance of flap type is exactly a valve plate pressure; The main resistance of butterfly valve derives from rotational resistance.Can find out that thus it mainly operates resistance: flap type＞gate valve＞＞butterfly valve.Because during butterfly switch, two and half plates of the valve plate that pivots, half moves against pressure, second half moves along pressure, and energy stream is to its positive and negative work done energy offset, and two and half plates form a pair of work done antithesis, utilize the valve plate rotatingshaft to realize the self balancing of valve plate pressure, the work done energy of outer operation only is used to overcome rotational resistance, and the operation resistance coefficient is more much lower than other two kinds, has good controllability.
2, for sealability and sealing reliability: the valve plate pressure of flap type, gate valve points to sealing surface, and pressure high sealing performance more is just good more, is called self-energized seal.If usefulness conversely, the anti-sealing surface that refers to of valve plate pressure, pressure high sealing performance more are just poor more, be called the autorelaxing type sealing.Flap type is relevant with the sealability and the service condition of gate valve, and only under the situation of one-directional fluid flow, the sealing surface of flap type, gate valve could be realized self-energized seal.See and can be described as the one-way sealing valve from the angle of sealing.In any case the primary sealing area of butterfly valve uses, second half circular arc of semi-circle self-tightening is always arranged for loose certainly, so the sealability of butterfly valve is not as flap type and gate valve.Valve plate and sealing surface produce slide relative when gate valve and butterfly switch, and then in use will produce wearing and tearing, have influenced sealability and sealing reliability; Valve plate is vertical disengaging with sealing surface during the flap type switch, thereby not easy to wear, abbreviates harmless switch as, and the reliability of sealing is higher than gate valve and butterfly valve.Therefore in the air-flow control of reality, for example in pressure swing adsorption technique, also use flap types in a large number.
In order to improve butterfly valve seal performance bad and the eccentric butter-fly valve that develops, for example double eccentric butterfly valve, 3 eccentric-butterfly-valves etc.Because eccentric butter-fly valve is all taken into account to some extent to the performance of each side, has better comprehensive performance, be present most widely used large-scale program-controlled valve.But no matter be which kind of eccentric butter-fly valve, be self-tightening sealing and second half valve plate for from the pine sealing always its primary sealing area has half valve plate, so its sealability is subjected to certain influence.
The patent No. is 87100516.6, denomination of invention is for " valve sealing structure of bracing type " and the patent No. are 00111674.6, denomination of invention supports the formula valve for the patent of invention specification of " the expanding-shut type valve sealing structure that the valve rod angle of swing opens and closes " all discloses a kind of receipts, this kind valve is the flap type that two back-to-back polyphones get up is all put into a valve body together with the outer operating device that makes its combined operation and to form, adopt the flap type working method during valve switch, belong to harmless switch.Receiving support formula valve has two sealing surfaces, and no matter fluid is from where, and it is self-tightening and another for from pine that two sealing surfaces must have one, so this is a kind of good two-way self-tightening sealing valve.
Receive support formula valve two valve plate in the process of valve switch and form a pair of work done antithesis, the positive and negative work done energy of two valve plate can be offset by inner combined operation mechanism.But this valve is in the DecryptDecryption envelope and add the sealing working stage, the valve plate of self-tightening one side can't be transferred to other places by sealing surface with the equilibrium of forces point after taking off power, valve can become unidirectional self tightening flap type, therefore, receives the inevitable the same huge unlatching moment that needs with unidirectional self tightening flap type of support formula valve.
In view of above analysis as can be seen, in large-scale valve design, solve minimum switch power comprehensively, realize two-way self-tightening sealing, harmless and snap switch is a still unsolved technical problem, also the determined report of technological scheme of this problem of opinion not in the disclosed abroad patent specification.
Summary of the invention
Need the deficiency of huge unlatching power in order to overcome existing double seal valve when opening, technical problem to be solved by this invention provides a kind of double seal valve that utilizes less unlatching power can realize open function.
The technical solution adopted for the present invention to solve the technical problems is: double seal valve, in the valve pocket that comprise the valve body of bringing outlet into, is arranged on valve body and respectively with two Sealings of import and outlet coupling, be connected with synchronizing linkage between two Sealings, be connected with pressure relief device between valve pocket and the import and export.
The invention has the beneficial effects as follows: owing to adopted the technological scheme that between valve pocket and import and export, is connected with pressure relief device, all basic of the overall process that can be implemented in valve switch need overcome rotational resistance, reduced the switch moment of valve greatly, make the minimum switch power of valve approaching with the average switch power of valve or equate, reduce the volume of valve external manipulation mechanism greatly and to the requirement of power source, improve the service speed and the life-span of valve, the minimum switch power of large-scale valve and the difference of the average switch power of valve can be reduced by 1～2 order of magnitude.Also make valve realize two-way self-tightening sealing simultaneously on both direction, therefore, valve has intrinsic safety, and promptly after peripheral operation moment disappeared, itself still was in closed condition its valve, can not open automatically under the effect of hydrodynamic pressure.This structure has also realized harmless snap switch by synchronizing linkage, the main stress part is fricton-tight on the direction of transfer of power, design all realizes easily with manufacturing, can improve valve internal operating device reliability, reduce the valve manufacture cost, be particularly suitable in the environment of big flow, high pressure, high sealing performance and at a high speed frequent switch, using.
Description of drawings
Fig. 1 is a valve mechanism schematic representation of the present invention.
Fig. 2 is the layout stereogram of the synchronizing linkage in the valve of the present invention.
Be labeled as among the figure: valve body 1, valve pocket 2, Sealing 3 and 4, pressure relief vent 5 and 6, one-way valve 7 and 8, pressure relief vent seal 9 and 10, rotary valve rod 11, driving plate 12, chute 13 and 14, lever 16 and 17, connecting rod 18,19,20 and 21, bearing pin 22,23,24 and 25, guide finger 26, load axle 27, driver slot 28, guiding groove 29.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, double seal valve, in the valve pocket 2 that comprise the valve body 1 of bringing outlet into, is arranged on valve body 1 and respectively with two Sealings 3,4 of import and outlet coupling, Sealing 3,4 can adopt any form commonly used such as valve plate, valve cone.Be connected with synchronizing linkage between two Sealings 3,4, be connected with pressure relief device between valve pocket 2 and the import and export.During valve opening, at first open pressure relief device valve pocket 2 is communicated with outlet, with the uneven tendency of its bucking-out system, the realizable force balance fulcrum shifts.The Sealing 3,4 that the parameter of adjusting pressure relief device also can realize valve is opened automatically opening pressure relief device.
Above-mentioned pressure relief device can adopt various ways, as long as reach can control valve pocket 2 is communicated with import and outlet.Be communicated with import simultaneously and export the control that can realize that two-way fluid flows, also can be communicated with outlet separately, be used for the environment of one-directional fluid flow this moment only separately.For example, can adopt following structure:
Pressure relief device comprises the pressure relief vent 6, one-way valve 7 and 8 and pressure relief vent seal 9 and 10 of the pressure relief vent 5 that is separately positioned on entrance point and outlet end, is connected with the release operating device on the pressure relief vent seal 9,10.Pressure relief vent 5 and 6 can be arranged on the valve body 1, also can be arranged on the Sealing 3,4, utilize the release operating device to realize the opening and closing of pressure relief vent 5,6 simultaneously, one-way valve 7,8 is arranged on pressure relief vent 5,6 passages and its direction enters valve pocket 2 for stoping fluid, therefore, one-way valve 7 and 8 is used to guarantee fluid normal release in valve pocket.
In order to reduce the sealing surface between valve body and the outside, improve the reliability of its valve, pressure relief vent 5,6 is preferably disposed on the Sealing 3,4, and its release operating device can be arranged on the inside of valve like this.
In order to improve the operation continuity of whole valve, reduce the number of operation piece, the best synchronous interaction of release operating device at two ends.The mode of its synchronous interaction can adopt multiple modes such as linkage mechanism, cam mechanism, leverage, slide-block mechanism to realize, for example:
The release operating device comprises rotary valve rod 11 that is arranged on valve pocket 2 middle parts and the driving plate 12 that is in transmission connection with rotary valve rod 11, the end that driving plate 12 is provided with 13,14, two pressure relief vent seals 9,10 of two chutes is separately positioned in the chute 13,14 and is adaptive with it.Like this, when utilizing rotary valve rod 11 to drive driving plates 12 rotations, utilize chute 13,14 to drive 9,10 motions of pressure relief vent seals synchronously, reach synchronous unlatching or close the purpose of pressure relief vent 5,6.Be not easy to interfere when sliding in chute 13,14 for the end that makes its pressure relief vent seal 9,10, the end that is arranged on the pressure relief vent seal 9,10 in the chute 13,14 is preferably the bulb shape.
The synchronizing linkage of two Sealings of above-mentioned connection 3,4 can adopt multiple modes such as linkage mechanism, leverage to realize, for the transmission of the power of accomplishing accurately and reliably, preferably adopt following lever construction:
Synchronizing linkage comprises the connecting rod 18,19,20,21 that is arranged on valve pocket 2 middle parts and is supported on the load axle 27 on the valve body 1, at least two levers 16,17 and is connected with Sealing 3,4, the two ends that empty cover is stacked in the lever 16,17 on the load axle 27 are respectively arranged with the long strip through hole, the end of connecting rod 18,19,20,21 is connected with the long strip through hole of lever 16,17 respectively by bearing pin 22,23,24,25, at least one connecting rod 18 is provided with guide finger 26, and guide finger 26 is suitable with the guiding groove 29 that is arranged on the valve body 1.Connecting rod 18,19,20,21 can be that hinge connects with being connected of Sealing 3,4, also can be the structure of one.
Above-mentioned synchronizing linkage and pressure relief device can adopt a covering device to finish, and can further improve the harmony of operated valve like this, reduce the volume and the amount of parts of valve, thereby reduce cost.Can be on the driving plate 12 that in above-mentioned pressure relief device, is in transmission connection by being provided with and the adaptive driver slot 28 at least one connecting rod 18 position with rotary valve rod 11.The position of connecting rod 18 is arranged in the driver slot 28, the width of driver slot 28 makes connecting rod can contact with the edge of driver slot 28 after the free rotating certain angle in driver slot 28, thereby utilize edge drivening rod 18 rotations of driver slot 28 after finishing unlatching or closing pressure relief device, realize utilizing rotary valve rod 11 to drive the purpose of Sealings 3,4.
Load axle 27 can be supported on separately on the valve body 1, in order to reduce the volume of operating device, simplifies its structure, and load axle 27 best skies are enclosed within on the rotary valve rod 11.
In order to reduce the valve resistance, two groups of synchronizing linkages preferably are separately positioned on the inwall place of the two ends of valve pocket 2 near valve body 1.For example during the synchronizing linkage in the actual design valve, can will be split as two groups behind lever 16,17 and connecting rod 18,19,20,21 attenuates 1/2, it is arranged on the both sides of Sealing 3,4 on the axial direction of load axle 27, allow out center area major part through-flow, thereby reduce the valve resistance greatly, as shown in Figure 2.
The whole action of opening and closing of this valve is all finished by three steps, corresponding respectively three functions that will realize, so this valve mechanism is called for short three step valves.
During unlatching: 1, open pressure relief device, be used for tolerance balancing and finish the transfer of the power strong point; 2, utilize synchronizing linkage to draw Sealing 3,4 in, make Sealing 3,4 break away from sealing surface; 3, the rotation synchronizing linkage makes Sealing 3,4 leave sealing station, thereby reduces the valve resistance.
When closing: 1, close pressure relief device; 2, the rotation synchronizing linkage makes Sealing 3,4 enter sealing station, thereby increases the valve resistance; 3, utilize synchronizing linkage to strut Sealing 3,4, Sealing 3, the 4 contact seal faces and the power strong point of finishing are transferred on the sealing surface.
Embodiment:
As shown in Figure 1 and Figure 2, double seal valve, in the valve pocket 2 that comprise the valve body 1 of bringing outlet into, is arranged on valve body 1 and respectively with two Sealings 3,4 of import and outlet coupling, Sealing 3,4 is the valve plate form.Have pressure relief vent 5,6 on Sealing 3,4, pressure relief vent 5,6 is provided with one-way valve 7,8 and the pressure relief vent seal 9,10 with its coupling.One-way valve 7,8 is arranged on pressure relief vent 5,6 passages and its direction enters valve pocket 2 for stoping fluid.The driving plate 12 that is provided with rotary valve rod 11 and is in transmission connection at valve pocket 2 middle parts with rotary valve rod 11, the end that driving plate 12 is provided with the bulb shape of 13,14, two pressure relief vent seals 9,10 of two chutes is separately positioned in the chute 13,14 and is adaptive with it.Like this, when utilizing rotary valve rod 11 to drive driving plates 12 rotations, utilize chute 13,14 to drive 9,10 motions of pressure relief vent seals synchronously, reach synchronous unlatching or close the purpose of pressure relief vent 5,6.
Be provided with the load axle 27 that is supported on the valve body 1 at valve pocket 2 middle parts, load axle 27 skies are enclosed within on the rotary valve rod 11, two lever 16,17 empty covers are stacked on the load axle 27, the two ends of lever 16,17 are respectively arranged with the long strip through hole, the end of connecting rod 18,19,20,21 is connected with the long strip through hole of lever 16,17 respectively by bearing pin 22,23,24,25, connecting rod 18 is provided with guide finger 26, and guide finger 26 is suitable with the guiding groove 29 that is arranged on the valve body 1.The driving plate 12 that is in transmission connection with rotary valve rod 11 is provided with the driver slot 28 adaptive with connecting rod 18 positions.The position of connecting rod 18 is arranged in the driver slot 28, the width of driver slot 28 makes connecting rod can contact with the edge of driver slot 28 after the free rotating certain angle in driver slot 28, thereby utilize edge drivening rod 18 rotations of driver slot 28 after finishing unlatching or closing pressure relief device, realize utilizing rotary valve rod 11 to drive the purpose of Sealings 3,4.
Be split as two groups behind lever 16,17 and connecting rod 18,19,20,21 attenuates 1/2, it be arranged on the both sides of Sealing 3,4 on the axial direction of load axle 27, as shown in Figure 2.
The valve opening process:
The first step: in the process of valve opening, rotary valve rod 11 clockwise rotates, driving plate 12 clockwises rotate, pressure relief vent seal 9, the end of 10 bulb shape is at chute 13,14 driving is motion down, open pressure relief vent 5,6, at this moment owing to one-way valve 8 pressurizeds on the pressure relief vent seal 10 are closed, fluid in the valve pocket 2 bleeds off by pressure relief vent 5, making had only a Sealing 3 stressed situations to become two Sealings 3 originally, 4 are subjected to equidirectional power simultaneously, and the pressure of pressing to sealing surface will be by Sealing 3,4 → lever 16,17 and connecting rod 18,19,20, the sequential transfer of 21 → load axle, 27 → valve body 1 is to valve body 1.Rotary valve rod 11 is rotated further the edge of the driver slot 28 of driving plate 12 and runs into lever 16, and pressure relief vent 5,6 is just opened fully, and the first step is finished.
Second step: the edge drive lever 16 of the driver slot 28 that the continuation of rotary valve rod 11 rotation will be by driving plate 12 rotates together.At this moment under guide finger 26 and guiding groove 29 retrain, equilibrium of forces effect by lever 16,17, in entrance point Sealing 4 〉=outlet end Sealing 3 stressed differential pressure and external force rotating lever 11 is rotated under the double action of pulling, two Sealings 3,4 draw in to the centre, break away from sealing surface.When drawing close the position that reaches capacity, Sealing 3,4 and load axle 27 are stuck, and second step finished.
The 3rd step: being rotated further of rotary valve rod 11 rotates to two Sealings of drives 3,4 parallel with pipeline together around load axle 27, thereby with whole valve open, the 3rd goes on foot and finish.
In the valve opening process, 3,4 suitable pressure directions of two Sealings move, and the contrary pressure direction of another piece moves, realize positive and negative work done energy basic neutralisation by leverage, differential pressure also can help to open, and outer spin just is used for overcoming rotational resistance, does not therefore need very big external force.
The valve closing process:
The first step: because the edge of the driver slot 28 of driving plate 12 and the gap between the lever 16, the inhour rotation of rotary valve rod 11 will drive driving plate 12, drive pressure relief vent seal 9,10 again and close pressure relief vent 5,6 earlier.
Second step: after lever 16 is run at the edge of the driver slot 28 of driving plate 12, the rotation of the inhour of rotary valve rod 11 will drive lever 16 inhour rotations, and two Sealings 3,4 will rotate with lever 16,17.Two Sealings 3,4 are directed to pin 26 when forwarding to the pipeline vertical position spacing with guiding groove 29, and second step finished.
The 3rd goes on foot: the continuation inhour rotation of rotary valve rod 11, because being directed to pin 26, rotate two Sealings 3,4 with guiding groove 29 spacing can't continuation, and driving plate 12 will drive lever 16 and strut two Sealings 3,4.When outlet end Sealing 3 arrival sealing surfaces, because its self-tightening structure, Sealing 3 pressure will be transferred to sealing surface gradually by lever 16,17.At this moment the power on the entrance point Sealing 4 makes entrance point Sealing 4 break away from sealing surface in valve pocket 2, and fluid can enter valve pocket 2, make that the Sealing 3 of outlet end is stressed to the external compression sealing surface, so valve closing can be finished by the controlled fluid energy.
Claims (10)
1, double seal valve, in the valve pocket (2) that comprise the valve body (1) of bringing outlet into, is arranged on valve body (1) and respectively with two Sealings (3,4) of import and outlet coupling, be connected with synchronizing linkage between two Sealings (3,4), it is characterized in that: be connected with pressure relief device between valve pocket (2) and the import and export.
2, double seal valve as claimed in claim 1, it is characterized in that: pressure relief device comprises pressure relief vent (5,6), one-way valve (7,8) and the pressure relief vent seal (9,10) that is separately positioned on import and outlet end, one-way valve (7,8) is arranged on pressure relief vent (5, the 6) passage and its direction enters valve pocket (2) for stoping fluid, and the pressure relief vent seal is connected with the release operating device on (9,10).
3, double seal valve as claimed in claim 2 is characterized in that: pressure relief vent (5,6) is arranged on the Sealing (3,4).
4, double seal valve as claimed in claim 2 is characterized in that: pressure relief vent (5,6) is arranged on the valve body (1).
5, double seal valve as claimed in claim 4, it is characterized in that: the release operating device comprises rotary valve rod (11) that is arranged on valve pocket (2) middle part and the driving plate (12) that is in transmission connection with rotary valve rod (11), driving plate (12) is provided with two chutes (13,14), and the end of two pressure relief vent seals (9,10) is separately positioned in the chute (13,14) and is adaptive with it.
6, double seal valve as claimed in claim 5 is characterized in that: the end that is arranged on the pressure relief vent seal (9,10) in the chute (13,14) is the bulb shape.
7, according to any described double seal valve of claim in 1～6, it is characterized in that: synchronizing linkage comprises and is arranged on valve pocket (2) middle part and is supported on load axle (27) on the valve body (1), at least two levers (16,17) and with Sealing (3,4) connecting rod (18 of Lian Jieing, 19,20,21), empty cover is stacked in the lever (16 on the load axle (27), 17) two ends are respectively arranged with the long strip through hole, connecting rod (18,19,20,21) end is by bearing pin (22,23,24,25) respectively with lever (16,17) long strip through hole connects, at least one connecting rod (18) is provided with guide finger (26), and guide finger (26) is suitable with the guiding groove (29) that is arranged on the valve body (1).
8, double seal valve as claimed in claim 7, it is characterized in that: the driving plate (12) that valve pocket (2) middle part is provided with rotary valve rod (11) and is in transmission connection with rotary valve rod (11), driving plate (12) is provided with the driver slot (28) adaptive with at least one connecting rod (18) position.
9, double seal valve as claimed in claim 8 is characterized in that: load axle (27) sky is enclosed within on the rotary valve rod (11).
10, double seal valve as claimed in claim 7 is characterized in that: two groups of synchronizing linkages are separately positioned on the inwall place of the two ends of valve pocket (2) near valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100675351A CN1332146C (en) | 2004-12-23 | 2005-04-19 | Double seal valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410081569.1 | 2004-12-23 | ||
| CN200410081569 | 2004-12-23 | ||
| CNB2005100675351A CN1332146C (en) | 2004-12-23 | 2005-04-19 | Double seal valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1699801A true CN1699801A (en) | 2005-11-23 |
| CN1332146C CN1332146C (en) | 2007-08-15 |
Family
ID=35475991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100675351A Expired - Fee Related CN1332146C (en) | 2004-12-23 | 2005-04-19 | Double seal valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1332146C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832662A (en) * | 2015-05-18 | 2015-08-12 | 权岚 | Butterfly valve with two actuators |
| CN107740868A (en) * | 2017-11-20 | 2018-02-27 | 郭弘 | A kind of butterfly valve with pre- decompression function |
| CN109114232A (en) * | 2018-10-31 | 2019-01-01 | 石家庄三环阀门股份有限公司 | Two-way isolating valve, |
| CN109340381A (en) * | 2018-11-07 | 2019-02-15 | 天津大学 | Multi-face sealing biological sealed valve |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5338003A (en) * | 1983-11-14 | 1994-08-16 | John Beson | Dual seal ball valve |
| CN1013988B (en) * | 1987-01-24 | 1991-09-18 | 王加新 | Valve sealing structure of bracing type |
| CN87215755U (en) * | 1987-11-24 | 1988-11-02 | 大连工学院 | Multifunction-closed type pre-operation safe valve |
| CN2165920Y (en) * | 1993-04-09 | 1994-05-25 | 梁秋林 | Double-sealing anti-explosive reaction pot |
| US5845675A (en) * | 1997-10-27 | 1998-12-08 | Ligh; J. Yen | Diaphragm/spring actuated pressure relief valve with pressure balanced outlet and fail-safe operation |
| CN1109832C (en) * | 2000-02-14 | 2003-05-28 | 王加新 | Seal structure of valve controlled by turning valve rod |
-
2005
- 2005-04-19 CN CNB2005100675351A patent/CN1332146C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832662A (en) * | 2015-05-18 | 2015-08-12 | 权岚 | Butterfly valve with two actuators |
| CN107740868A (en) * | 2017-11-20 | 2018-02-27 | 郭弘 | A kind of butterfly valve with pre- decompression function |
| CN109114232A (en) * | 2018-10-31 | 2019-01-01 | 石家庄三环阀门股份有限公司 | Two-way isolating valve, |
| CN109114232B (en) * | 2018-10-31 | 2023-10-24 | 石家庄三环阀门股份有限公司 | Bidirectional isolating valve |
| CN109340381A (en) * | 2018-11-07 | 2019-02-15 | 天津大学 | Multi-face sealing biological sealed valve |
| CN109340381B (en) * | 2018-11-07 | 2019-10-25 | 天津大学 | Multi-face sealing biological sealed valve |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1332146C (en) | 2007-08-15 |
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Owner name: JIANMEN PUMP INDUSTRY CO., LTD., SANTAI, SICHUAN Free format text: FORMER OWNER: PAN SHIYONG Effective date: 20120412 |
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Effective date of registration: 20120412 Address after: 621100 Sichuan Province three County Agricultural Nanhe Town Road No. 528 Patentee after: Jianmen Pump Industry Co., Ltd., Santai, Sichuan Address before: 610039 No. 2, unit 22, dormitory 8, Xihua University, Chengdu, Sichuan Patentee before: Pan Shiyong |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 Termination date: 20140419 |