CN113137485A - Integrated side valve - Google Patents
Integrated side valve Download PDFInfo
- Publication number
- CN113137485A CN113137485A CN202110385876.2A CN202110385876A CN113137485A CN 113137485 A CN113137485 A CN 113137485A CN 202110385876 A CN202110385876 A CN 202110385876A CN 113137485 A CN113137485 A CN 113137485A
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- China
- Prior art keywords
- valve
- butterfly
- valve body
- ring
- rod
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- 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.)
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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
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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
- F16K1/221—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 specially adapted operating means therefor
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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
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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
- F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
Abstract
The invention belongs to the technical field of valves, and provides an integrated side valve which comprises a valve body, wherein the valve body comprises flange surfaces connected with a ship body and a system pipeline, a set of butterfly valve switch units are respectively arranged near the two flange surfaces, the butterfly valve switch unit comprises a butterfly plate, a spiral ring, a press ring, a valve rod, a bottom cover, a shuttle valve and a hollow seal ring, the valve rod and the butterfly plate are driven by a flat key, the butterfly plate realizes the opening and closing of the valve by rotary motion, the bottom cover is fixedly connected on the valve body, the hollow sealing ring is used for sealing the lower valve rod and the valve body, is tightly pressed and fixed in the valve body through the spiral ring and the pressing ring, when the butterfly plate is in a closed state, the hollow sealing ring is positioned between the butterfly plate and the valve body to form sealing, the shuttle valve is fixed outside the valve body, and a flow passage is arranged among the shuttle valve, the valve body and the hollow sealing ring and used for guiding a medium into the hollow sealing ring. The integrated side valve has compact structure and small operating force, can realize bidirectional sealing under different pressure differences, and has wide application range.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to an integrated side valve.
Background
The side valve is used for opening/closing an opening on the ship body, and on the ship, the system needs to be communicated with the outside of the ship, such as the system is opened when water is filled/drained, and the system is closed at other times to ensure the tightness of the ship body. One side of the side valve is connected with a welding part on the ship body, and the other side of the side valve is connected with a system pipeline. As a pressure boundary, the leak of the side valve is equivalent to the destruction of the hull, and therefore, the sealing performance is very important. In order to ensure the safety of the ship, in the occasions with large pressure difference between the inside and outside of the ship body, such as a deep submersible vehicle, a plurality of valves are usually arranged on the pipeline behind the side valve, and the subsequent valves and the pipeline between the valves have the same pressure resistance as the side valve, so that multi-insurance is realized by the plurality of valves. Because of the shortage of the inner space of the deep submergence device, the volume of a plurality of valves and pipelines among the valves needs to be controlled.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the integrated side valve which has the advantages of compact structure, small operating force, capability of realizing bidirectional sealing under different pressure differences and wide application range.
The invention aims to realize the purpose by the following technical scheme.
An integrated side valve comprises a valve body, wherein the valve body is the main body part of the side valve, the valve body comprises flange faces connected with a ship body and a system pipeline, a set of butterfly valve switch unit is respectively arranged near each of the two flange faces, each butterfly valve switch unit comprises a butterfly plate, a spiral ring, a pressing ring, a valve rod, a bottom cover, a shuttle valve and a hollow sealing ring, each valve rod comprises an upper valve rod and a lower valve rod, the upper valve rod and the lower valve rod penetrate through the valve body, the valve rods and the butterfly plates are in flat key transmission and are used for driving the butterfly plates to rotate, the butterfly plates realize the opening and closing of the valves through rotary motion, the bottom covers are fixedly connected on the valve body and are used for realizing the sealing of the lower valve rods and the valve body, the hollow sealing rings are tightly pressed and fixed inside the valve body through the spiral rings and the pressing rings, so that the pretightening force is adjusted, the sealing effect is ensured, and when the butterfly plates are in a closed state, the hollow sealing rings are positioned between the butterfly plates and the valve body, the butterfly valve is characterized in that sealing is formed, self sealing of the valve is achieved, the shuttle valve is fixed outside the valve body, a flow channel is arranged among the shuttle valve, the valve body and the hollow sealing ring and used for guiding a medium into the hollow sealing ring, the medium at the high-pressure end of the butterfly valve enters the inside of the hollow sealing ring through the shuttle valve during operation, the sealing ring expands outwards, contact stress of the hollow sealing ring and the sealing surface of the butterfly plate is increased, and reliable sealing is guaranteed by means of pretightening force and contact stress.
In the technical scheme, the integrated side valve comprises a manual execution device, the manual execution device is connected with the valve rod, and an indicating plate is arranged on the manual execution device and used for indicating the opening and closing positions of the valve.
In the technical scheme, the integrated side valve comprises a speed reducing hand wheel, wherein the speed reducing hand wheel is connected with a valve rod and comprises a speed reducer, a hand wheel and the like, and the speed reducing hand wheel is used for reducing the hand-operated torque of the valve.
In above-mentioned technical scheme, integrated topside valve is including the final controlling element that surges, the final controlling element that surges links to each other with the valve rod, the final controlling element that surges comprises gear, rack, hydraulic cylinder, piston, indicator etc. and drive piston motion under the hydraulic oil effect, rack and gear change reciprocating motion into rotary motion, drive the butterfly valve rod and rotate, and the butterfly valve rod drives the butterfly plate and rotates to make the butterfly valve close or open, the indicator sets up at the final controlling element's that surges top, but on-the-spot mechanical indication valve open-close position, also can long-range transmission valve open-close position signal of telecommunication. The electromagnetic directional valve is connected with the hydraulic actuator, and the electromagnetic directional valve switches the hydraulic flow direction after receiving a control instruction.
In the technical scheme, in order to reduce the pipeline arrangement space, the two flange surfaces of the valve body are vertically arranged.
In the technical scheme, the hydraulic actuator is arranged at the side end and is connected with the valve rod of the butterfly valve switch unit at the side end, the manual actuator or the speed reducing hand wheel is arranged at the pipeline end, and the manual actuator or the speed reducing hand wheel is connected with the valve rod of the butterfly valve switch unit at the pipeline end.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the integrated side valve provided with two valves with highest pressure resistance and a middle pipe section, the integrated side valve has the advantages that the size is reduced, and the cost is saved. The hydraulic actuator is arranged at the side end of the board, so that the opening and closing of the sea opening can be quickly realized, and the two valves can be manually closed under the conditions of power loss, liquid loss and the like, and the two locks are mutually standby, so that the safety is high. Is particularly suitable for occasions with short space such as deep submergence vehicles and the like.
2. The integrated side valve can realize bidirectional sealing under different pressure differences, and has wide application range. And the hollow sealing ring is adopted to realize sealing under high-pressure and low-pressure media.
3. The integrated side valve has compact structure and small operating force.
4. The integrated side valve can be additionally provided with an air interface in the middle of the valve body and is used for blowing off when the valve is blocked.
Drawings
Fig. 1 is a schematic structural diagram (including a manual actuator) of a first embodiment of the integrated side port valve of the present invention.
Fig. 2 is a left side view of a first embodiment of the integrated side port valve of the present invention (including a manual actuator).
Wherein: 1. the valve comprises a valve body, 2 butterfly plates, 3 spiral rings, 4 compression rings, 5 valve rods, 6 bottom covers, 7 shuttle valves, 8 hollow sealing rings, 9 hydraulic actuators, 10 electromagnetic directional valves, 11 manual actuators and 12 flat keys.
Fig. 3 is a schematic structural diagram (including a reducing hand wheel) of a second embodiment of the integrated side port valve of the invention.
Fig. 4 is a left side view of a second embodiment of the integrated side port valve of the present invention (including a reduction hand wheel).
Wherein: 13. a speed reducing hand wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are illustrative of the invention and are not to be construed as limiting the invention. In addition, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and fig. 2, the integrated topside valve according to the present embodiment includes a valve body 1, a butterfly plate 2, a spiral ring 3, a pressure ring 4, a valve rod 5, a bottom cover 6, a shuttle valve 7, a hollow seal ring 8, a hydraulic actuator 9, an electromagnetic directional valve 10, a manual actuator 11, and the like. The valve body 1 comprises flange faces and the like connected with a ship body and a system pipeline, is a main body part of the topside valve and is connected with a valve rod 5, a hydraulic actuator 9, a shuttle valve 7 and the like, a butterfly plate 2, a spiral ring 3, a pressure ring 4 and the like are arranged inside the valve body 1, and the two flange faces are vertically arranged for reducing the pipeline arrangement space. And a set of butterfly valve switch unit is arranged near each of the two flange surfaces, each butterfly valve switch unit comprises a butterfly plate 2, a spiral ring 3, a pressure ring 4, a valve rod 5, a bottom cover 6, a shuttle valve 7 and a hollow sealing ring 8, and the butterfly plates 2 realize opening and closing of the valve through rotary motion. The hollow sealing ring 8 is arranged inside the valve body and is compressed by the spiral ring 3 and the compression ring 4, so that the pretightening force is adjusted, and the sealing effect is ensured. The valve rod 5 comprises an upper valve rod 5a and a lower valve rod 5b, penetrates through the valve body 1, and is in transmission with the butterfly plate 2 through a flat key 12 to drive the butterfly plate 2 to rotate. The bottom cover 6 is fixedly connected to the valve body 1 and used for sealing the lower valve rod 5b with the valve body 1. The shuttle valve 7 is fixed outside the valve body 1, and a flow passage is arranged among the shuttle valve 7, the valve body 1 and the hollow sealing ring 8 and used for guiding a medium into the hollow sealing ring 8. When the butterfly plate 2 is in a closed state, the hollow sealing ring is positioned between the butterfly plate and the valve body to form sealing, the valve self-sealing is realized, a medium at the high-pressure end of the butterfly valve enters the hollow sealing ring 8 through the shuttle valve 7 during operation to cause the sealing ring to expand outwards, so that the contact stress between the sealing ring and the sealing surface of the butterfly plate 2 is increased, and reliable sealing is ensured by virtue of pretightening force and contact stress.
The hydraulic actuator is arranged at the broadside end and connected with a valve rod of the butterfly valve switch unit at the broadside end, and the manual actuator is arranged at the pipeline end and connected with the valve rod of the butterfly valve switch unit at the pipeline end.
The hydraulic actuator 9 is composed of a gear, a rack, a hydraulic cylinder, a piston, an indicator and the like and is used for driving the piston to move under the action of hydraulic oil, the rack and the gear convert reciprocating motion into rotary motion to drive the butterfly valve rod 5 to rotate, the butterfly valve rod 5 drives the butterfly plate 2 to rotate, so that the butterfly valve is closed or opened, the indicator is arranged at the top of the hydraulic actuator and can mechanically indicate the opening and closing position of the valve on site and send an electric signal of the opening and closing position of the valve remotely. The electromagnetic directional valve 10 is connected with the hydraulic actuator 9, and the electromagnetic directional valve 10 switches the hydraulic flow direction after receiving a control instruction.
The manual execution device is connected with the valve rod, the manual execution device 11 is composed of a handle 11a, a positioning plate 11b, an indicating plate 11c, a stop rod, a spring, a connecting plate, a wrench head and the like, the positioning plate 11b is used for fixing the position of the handle, and the indicating plate 11c is used for indicating the opening and closing position of the valve.
As shown in fig. 3 and 4, the embodiment provides an integrated topside valve, which comprises a valve body, a butterfly plate, a spiral ring, a pressing ring, a valve rod, a bottom cover, a shuttle valve, a hollow sealing ring, a hydraulic actuator, an electromagnetic directional valve, a speed reducing hand wheel 13, and the like.
The hydraulic actuator is arranged at the side end and connected with a valve rod of the butterfly valve switch unit at the side end, and the speed reducing hand wheel is arranged at the pipeline end and connected with the valve rod of the butterfly valve switch unit at the pipeline end.
The speed reducing hand wheel 13 comprises a speed reducer 13a, a hand wheel 13b and the like, and is used for reducing the hand operation torque of the valve.
The embodiment of the invention is suitable for occasions with large drift diameter and limited volume, and the invention has good effect when being used for the shipboard locking of seawater, fresh water and air systems of ships.
The present invention includes, but is not limited to, the above embodiments, and any equivalent replacement or partial modification made under the spirit and principle of the present invention, such as exchanging the manual or hydraulic actuating object, and then rotating the position of the manual actuating device along the rotating shaft to adapt to different arrangement requirements, or arranging the hydraulic actuating device on different sides of the valve body, are considered to be within the protection scope of the present invention.
Details not described in the present specification belong to the prior art known to those skilled in the art.
Claims (6)
1. An integrated broadside valve, characterized by: the butterfly valve comprises a valve body, wherein the valve body comprises flange faces connected with a ship body and a system pipeline, a set of butterfly valve switch unit is respectively arranged near each of the two flange faces, each butterfly valve switch unit comprises a butterfly plate, a spiral ring, a pressing ring, a valve rod, a bottom cover, a shuttle valve and a hollow sealing ring, each valve rod comprises an upper valve rod and a lower valve rod, the upper valve rod and the lower valve rod penetrate through the valve body, the valve rods and the butterfly plates are in flat key transmission, the butterfly plates realize opening and closing of the valve through rotary motion, the bottom covers are fixedly connected to the valve body and used for realizing sealing of the lower valve rods and the valve body, the hollow sealing rings are tightly pressed and fixed inside the valve body through the spiral rings and the pressing rings, when the butterfly plates are in a closed state, the hollow sealing rings are located between the butterfly plates and the valve body to form sealing, the shuttle valve is fixed outside the valve body, and runners are arranged among the shuttle valve, the valve body and the hollow sealing rings and used for guiding media into the hollow sealing rings, when the butterfly valve works, a medium at the high-pressure end of the butterfly valve enters the hollow sealing ring through the shuttle valve, and the contact stress between the hollow sealing ring and the sealing surface of the butterfly plate is increased.
2. The integrated broadside valve of claim 1, wherein: the manual valve opening and closing device comprises a manual execution device, wherein the manual execution device is connected with a valve rod, and an indicating plate is arranged on the manual execution device and used for indicating the opening and closing positions of a valve.
3. The integrated broadside valve of claim 1, wherein: the manual valve comprises a speed reducing hand wheel, wherein the speed reducing hand wheel is connected with a valve rod and comprises a speed reducer and a hand wheel, and the speed reducing hand wheel is used for reducing the manual operation torque of the valve.
4. The integrated broadside valve of claim 1, wherein: the hydraulic actuator is connected with a valve rod, an indicator is arranged at the top of the hydraulic actuator and used for indicating the opening and closing positions of the valve, the hydraulic actuator is connected with an electromagnetic directional valve, and the electromagnetic directional valve is connected with a control instruction and switches the flow direction of hydraulic pressure.
5. The integrated broadside valve of claim 1, wherein: two flange surfaces of the valve body are vertically arranged.
6. The integrated broadside valve of claim 1, wherein: the hydraulic actuator is arranged at the side end and connected with a valve rod of the butterfly valve switch unit at the side end, the manual actuator or the speed reduction hand wheel is arranged at the pipeline end and connected with the valve rod of the butterfly valve switch unit at the pipeline end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385876.2A CN113137485A (en) | 2021-04-11 | 2021-04-11 | Integrated side valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385876.2A CN113137485A (en) | 2021-04-11 | 2021-04-11 | Integrated side valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113137485A true CN113137485A (en) | 2021-07-20 |
Family
ID=76811240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110385876.2A Pending CN113137485A (en) | 2021-04-11 | 2021-04-11 | Integrated side valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113137485A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4815693A (en) * | 1988-05-11 | 1989-03-28 | Lunkenheimer Tubecraft Canada Ltd. | Valve with actuating handle operable in different quadrants |
| CN2104351U (en) * | 1991-06-24 | 1992-05-13 | 天津市第一阀门厂 | Central-line double-flange butterfly valve |
| CN2348192Y (en) * | 1998-10-18 | 1999-11-10 | 张重辉 | Charge and discharge valve |
| CN1611821A (en) * | 2003-10-30 | 2005-05-04 | 上海海星阀门总厂 | Hydraulic manual high corrosion resistance two-way sealed butterfly valve |
| CN107355547A (en) * | 2017-08-08 | 2017-11-17 | 英诺威阀业有限公司 | It is a kind of from pressurising bidirectional sealed butterfly valve |
| CN208982670U (en) * | 2018-10-25 | 2019-06-14 | 上海威泽尔机械设备制造有限公司 | A kind of gas-flow closure butterfly valve |
-
2021
- 2021-04-11 CN CN202110385876.2A patent/CN113137485A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4815693A (en) * | 1988-05-11 | 1989-03-28 | Lunkenheimer Tubecraft Canada Ltd. | Valve with actuating handle operable in different quadrants |
| CN2104351U (en) * | 1991-06-24 | 1992-05-13 | 天津市第一阀门厂 | Central-line double-flange butterfly valve |
| CN2348192Y (en) * | 1998-10-18 | 1999-11-10 | 张重辉 | Charge and discharge valve |
| CN1611821A (en) * | 2003-10-30 | 2005-05-04 | 上海海星阀门总厂 | Hydraulic manual high corrosion resistance two-way sealed butterfly valve |
| CN107355547A (en) * | 2017-08-08 | 2017-11-17 | 英诺威阀业有限公司 | It is a kind of from pressurising bidirectional sealed butterfly valve |
| CN208982670U (en) * | 2018-10-25 | 2019-06-14 | 上海威泽尔机械设备制造有限公司 | A kind of gas-flow closure butterfly valve |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210720 |
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| RJ01 | Rejection of invention patent application after publication |