CN112539285A - Hemisphere valve that can maintain on line - Google Patents

Hemisphere valve that can maintain on line Download PDF

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Publication number
CN112539285A
CN112539285A CN202011415843.XA CN202011415843A CN112539285A CN 112539285 A CN112539285 A CN 112539285A CN 202011415843 A CN202011415843 A CN 202011415843A CN 112539285 A CN112539285 A CN 112539285A
Authority
CN
China
Prior art keywords
valve
sealing
clack
ring
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011415843.XA
Other languages
Chinese (zh)
Inventor
张旭锋
张帅明
李静
雷霆
吴江旭
万丽丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan Quanshun Flow Control Science & Technology Co ltd
Original Assignee
Henan Quanshun Flow Control Science & Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henan Quanshun Flow Control Science & Technology Co ltd filed Critical Henan Quanshun Flow Control Science & Technology Co ltd
Priority to CN202011415843.XA priority Critical patent/CN112539285A/en
Publication of CN112539285A publication Critical patent/CN112539285A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0626—Easy mounting or dismounting means
    • 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
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
    • F16K41/026—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles for rotating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0684—Packings on the plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0694—Spindle sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

The invention discloses a hemisphere valve which can be maintained on line, comprising: the valve body, valve body are equipped with two openings, establish the valve clack in the valve body, and the valve rod is connected on valve clack upper portion, valve rod under the valve clack sub-unit connection, still be equipped with the side opening on the valve body, the side opening can be dismantled and connect the apron, and the inboard of one of them opening part valve body is equipped with the disk seat, and the inboard of disk seat can be dismantled and connect the clamping ring, and the: the valve clack body, the valve clack body can be dismantled and connect the valve clack sealing washer, is equipped with the sealed face of mutually supporting on disk seat and the valve clack sealing washer. It can be used for on-line maintenance of valve clack and valve seat.

Description

Hemisphere valve that can maintain on line
Technical Field
The invention relates to a valve, in particular to a hemispherical valve capable of being maintained on line.
Background
In order to maintain the valve on line conveniently in the prior art, an upper-mounted half ball valve is generally selected. The existing upper-mounted hemispherical valve mainly comprises an upper valve rod, a lower valve rod, a valve seat, a valve clack, a valve body, a valve cover, an upper opening, an actuator and the like, wherein the upper valve rod and the lower valve rod of the hemispherical valve are connected to the valve clack, the valve seat is arranged on the valve body on one side of the valve clack, the valve seat is fixed on the valve body through a pressing ring on the outer side of the valve seat, and the valve clack is matched with the valve seat to realize the. When the upper-mounted hemisphere is overhauled on line, the valve clack can only be taken out through the upper opening of the valve body so as to maintain the valve clack, the valve seat is fixed from the outer side of the valve body through the pressing ring, the valve seat cannot be taken out through the upper opening of the valve body for maintenance, and the valve seat needs to be replaced after the whole valve is detached from a pipeline and disassembled.
Disclosure of Invention
The invention aims to provide a semi-ball valve capable of being maintained on line, which overcomes the defects in the prior art and can be used for maintaining a valve clack and a valve seat on line.
The object of the present invention is achieved by a structure including: the valve body, valve body are equipped with two openings, establish the valve clack in the valve body, and the valve rod is connected on valve clack upper portion, valve rod under the valve clack sub-unit connection, still be equipped with the side opening on the valve body, the side opening can be dismantled and connect the apron, and the inboard of one of them opening part valve body is equipped with the disk seat, and the inboard of disk seat can be dismantled and connect the clamping ring, and the: the valve clack body, the valve clack body can be dismantled and connect the valve clack sealing washer, is equipped with the sealed face of mutually supporting on disk seat and the valve clack sealing washer.
The clamping ring is composed of at least two sub-plates.
And a soft sealing ring is arranged on the valve clack body at the joint of the valve clack sealing ring and the valve clack body, and one end of the soft sealing ring is in contact with the sealing surface of the valve seat.
The sealing device between the upper valve rod and the valve body comprises: the middle of the sealing base is provided with a through hole, the sealing base is provided with a valve rod sealing ring, the valve rod sealing ring is positioned in the through hole and on the outer surface of the sealing base, the upper part of the sealing base is detachably connected with a packing gland, and packing is arranged between the sealing base and the packing gland.
The valve body on the inner side of the valve seat is provided with a groove, the pressing ring is positioned in the groove, a spring is arranged between the valve seat and the valve body, and the width of the groove is larger than or equal to the thickness of the pressing ring.
According to the invention, the side opening and the valve seat on the inner side of the valve body are eliminated, the valve seat is taken out from the valve body through the side opening for maintenance under the condition that the valve body needs to be detached from a pipeline, and the valve clack sealing ring can be detached from the valve clack body for maintenance, so that the maintenance of the valve is simplified, and the service life of the valve is prolonged. The clamping ring is composed of at least two sub-plates, so that the clamping ring can be conveniently installed and removed, the working efficiency of maintenance is improved, and the convenience of maintenance is improved. Still be equipped with soft sealing washer on the valve clack body, further increased the sealed effect of valve clack. Go up the sealing device who adopts between valve rod and valve body, conveniently follow the packing of trading on line, carry out sealing device's maintenance. A spring is arranged between the valve body and the valve seat, so that the valve seat and the valve clack are more attached, and the sealing effect of the valve is improved.
Drawings
Fig. 1 is a front sectional view of the present invention, fig. 2 is a left side view of the present invention, fig. 3 is a top sectional view of fig. 1, fig. 4 is a partially enlarged view of a portion a of fig. 1, fig. 5 is a partially enlarged view of a portion B of fig. 1, fig. 6 is a schematic diagram of the assembled clamping ring segments of the present invention, and fig. 7 is a schematic diagram of the clamping ring segments of the present invention.
Wherein: 1, valve clack; 2, a lower valve rod; 3, a valve body; 4, pressing a ring; 5, sealing the device; 6, valve seats; 7 an actuator; 8, covering a plate; 9, grooves; 10, an upper valve rod; 11; a valve seat sealing ring; 12 springs; 101 a valve flap body; 102 valve clack sealing ring; 103 a body sealing ring; 104 soft sealing ring; 501 sealing the base; 502 stem seal ring; 503 packing gland; 504 with a filler.
Detailed Description
Embodiment 1 of the present invention shown in fig. 1, 2, 3, and 4 includes: the valve body 3, the valve body 3 is equipped with two openings, and two openings are used for connecting the pipeline. The valve body 3 is internally provided with an eccentric valve clack 1, the upper part of the valve clack 1 is eccentrically connected with an upper valve rod 10, the lower part of the valve clack 1 is eccentrically connected with a lower valve rod 2, and the top end of the upper valve rod 10 is connected with an actuator 7, namely a double-eccentric half ball valve. The valve body 3 is also provided with a side opening which is connected with the cover plate 8 through a bolt. The inner side of one opening of the valve body 3 is provided with a step, a valve seat 6 is arranged at the step, and the inner side of the valve seat 6 is connected with the pressing ring 4 through a bolt. As shown in fig. 6 and 7, the pressing ring 4 is composed of three sub-plates, so that the pressing ring 4 can be conveniently assembled and disassembled in the valve body. The valve body on the inner side of the valve seat 6 is provided with a groove 9, the pressing ring 4 is positioned in the groove 9, a spring 12 is arranged between the valve seat 6 and the valve body 3, the initial state of the spring 12 is a compression state, the width of the groove 9 is larger than the thickness of the pressing ring 4, and the pressing ring 4 can slide in the groove 9. The contact department of disk seat 6 and valve body 3 is equipped with valve seat sealing washer 11, and valve seat sealing washer 11 is located the surface of disk seat 6, and valve seat sealing washer 11 is rubber seal, and valve seat sealing washer 11 is in order to prevent that the medium from passing through the gap seepage between disk seat 6 and valve body 3. When the valve is cut off in the reverse direction (namely from left to right in the figure), the pressing ring 4 and the valve seat 6 are integrally pressed against the valve clack 1 under the action of medium pushing and the elastic force of the spring 12, and the higher the pressure of the medium is, the stronger the sealing force of the valve is; when the valve is stopped in the positive direction (i.e. from right to left in the figure), the medium pushes the valve flap 1 to lean against the valve seat 6, the spring 12 between the valve seat 6 and the pressing ring 4 is further compressed to directly transmit the pressure of the medium to the valve body 3, and the bolt on the pressing ring 4 does not bear the pressure of the medium any more and only plays a role in fixing the pressing ring and the valve seat. Therefore, no matter the medium enters the valve body in the forward direction or the reverse direction, the bolts connected with the pressing ring and the valve seat do not bear medium force, the size and the number of the bolts can be reduced, and the difficulty and the processing cost of maintenance are reduced.
The valve flap 1 includes: the valve clack body 101 is connected with a valve clack sealing ring 102 through a bolt, and hard sealing surfaces matched with each other are arranged on the valve seat 6 and the valve clack sealing ring 102. A body sealing ring 103 is arranged between the valve clack body 101 and the valve clack sealing ring 102, and the body sealing ring 103 is a rubber sealing ring used for sealing between the valve clack body 101 and the valve clack sealing ring 102. The valve clack body 101 at the joint of the valve clack sealing ring 102 and the valve clack body 101 is provided with a soft sealing ring 104, one end of the soft sealing ring 104 is in contact with a hard sealing surface of the valve seat 6, and the soft sealing ring 104 is a rubber sealing ring and is used for being matched with the hard sealing to improve the sealing effect.
When the valve is used for a certain time and the sealing surface is damaged, the bolt on the cover plate 8 is screwed off, so that the cover plate 8 is detached from the valve body 3, the valve clack 1 is rotated through the actuator 7, so that the valve clack sealing ring 102 is rotated to an opening position on one side, after the bolt on the valve clack sealing ring 102 is detached, the damaged soft sealing ring 104 and the valve clack sealing ring 102 are taken out of the valve body 3, then the intact soft sealing ring and the valve clack sealing ring are placed on the valve clack, and the intact soft sealing ring and the valve clack sealing ring are fixed on the valve clack body through the bolt again after the replacement is; then the valve clack 1 is turned to the opening at the other side (as the right side of the front view of fig. 3), at this time, the bolts for fixing the valve seat 6 and the pressing ring 4 are detached, the damaged valve seat 6 is taken out from the valve body, then the intact valve seat is replaced, and the three pressing ring 4 sub-plates are fixed back to the replaced valve seat 6 through the bolts. Finally, the replacement of the valve seat and the flap is completed after the cover plate 8 is reconnected to the valve body 3. The whole disassembly is simple, but no special tool is needed, so that the valve maintenance time is greatly reduced, the whole service life of the valve is prolonged, and the comprehensive use cost is reduced.
As shown in fig. 5, the sealing device 5 between the upper stem 10 and the valve body 3 includes: the middle of the sealing base 501 is provided with a through hole, the sealing base 501 is provided with a valve rod sealing ring 502, the valve rod sealing ring 502 is positioned in the through hole and on the outer surface of the sealing base, the valve rod sealing ring 502 is a rubber sealing ring, the upper part of the sealing base 502 is connected with a packing gland 503 through a bolt, a packing 504 is arranged between the sealing base 501 and the packing gland 503, and the packing 504 is a graphite sealing ring. The filler 504 can be replaced by removing the bolts from the gland 503 and then opening the gland 503 to replace the filler without shutting off the entire pipeline.
The basic configuration of embodiment 2 of the present invention is the same as embodiment 1, and the differences are only: the width of the groove on the valve body on the inner side of the valve seat is equal to the thickness of the pressing ring, the connecting position of the pressing ring and the valve seat is located on the outer edge of the valve seat, the spring between the valve seat and the valve body is in a compression state of the spring, and when an error exists in machining of the valve seat or the valve clack, the valve seat can still be effectively contacted with the valve clack together to achieve the effect of sealing the valve.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention, and it is to be understood that various modifications to the disclosed embodiments may be made and that the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, any technical solutions that are the same as or similar to the present embodiment fall within the scope of the present invention.

Claims (8)

1. An on-line serviceable hemispherical valve comprising: the valve body, the valve body is equipped with two openings, establishes the valve clack in the valve body, and valve rod, its characterized in that under the valve clack sub-unit connection are connected to valve clack upper portion connection upper valve rod, valve clack upper portion: still be equipped with the side opening on the valve body, the side opening can be dismantled and connect the apron, and the inboard of one of them opening part valve body is equipped with the disk seat, and the inboard of disk seat can be dismantled and connect the clamping ring, and the valve clack includes: the valve clack body, the valve clack body can be dismantled and connect the valve clack sealing washer, is equipped with the sealed face of mutually supporting on disk seat and the valve clack sealing washer.
2. An online repairable half ball valve according to claim 1, wherein: the clamping ring is composed of at least two sub-plates.
3. An on-line maintainable hemispherical valve according to claim 1 or 2 wherein: and a soft sealing ring is arranged on the valve clack body at the joint of the valve clack sealing ring and the valve clack body, and one end of the soft sealing ring is in contact with the sealing surface of the valve seat.
4. An on-line maintainable hemispherical valve according to claim 1 or 2 wherein: the sealing device between the upper valve rod and the valve body comprises: the middle of the sealing base is provided with a through hole, the sealing base is provided with a valve rod sealing ring, the valve rod sealing ring is positioned in the through hole and on the outer surface of the sealing base, the upper part of the sealing base is detachably connected with a packing gland, and packing is arranged between the sealing base and the packing gland.
5. An on-line maintainable hemispherical valve according to claim 3 wherein: the sealing device between the upper valve rod and the valve body comprises: the middle of the sealing base is provided with a through hole, the sealing base is provided with a valve rod sealing ring, the valve rod sealing ring is positioned in the through hole and on the outer surface of the sealing base, the upper part of the sealing base is detachably connected with a packing gland, and packing is arranged between the sealing base and the packing gland.
6. An on-line maintainable hemispherical valve according to claim 1, 2 or 5 wherein: the valve body on the inner side of the valve seat is provided with a groove, the pressing ring is positioned in the groove, a spring is arranged between the valve seat and the valve body, and the width of the groove is larger than or equal to the thickness of the pressing ring.
7. An on-line maintainable hemispherical valve according to claim 3 wherein: the valve body on the inner side of the valve seat is provided with a groove, the pressing ring is positioned in the groove, a spring is arranged between the valve seat and the valve body, and the width of the groove is larger than or equal to the thickness of the pressing ring.
8. An on-line maintainable hemispherical valve according to claim 4 wherein: the valve body on the inner side of the valve seat is provided with a groove, the pressing ring is positioned in the groove, a spring is arranged between the valve seat and the valve body, and the width of the groove is larger than or equal to the thickness of the pressing ring.
CN202011415843.XA 2020-12-07 2020-12-07 Hemisphere valve that can maintain on line Pending CN112539285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011415843.XA CN112539285A (en) 2020-12-07 2020-12-07 Hemisphere valve that can maintain on line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011415843.XA CN112539285A (en) 2020-12-07 2020-12-07 Hemisphere valve that can maintain on line

Publications (1)

Publication Number Publication Date
CN112539285A true CN112539285A (en) 2021-03-23

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Family Applications (1)

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CN202011415843.XA Pending CN112539285A (en) 2020-12-07 2020-12-07 Hemisphere valve that can maintain on line

Country Status (1)

Country Link
CN (1) CN112539285A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114576384A (en) * 2022-02-17 2022-06-03 国工控股集团有限公司 Bidirectional sealing C-shaped ball valve
US20230131017A1 (en) * 2021-10-27 2023-04-27 Hamilton Sundstrand Corporation Ball valve system with ball mounted seal

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201621313U (en) * 2009-12-02 2010-11-03 河南泉舜流体控制科技有限公司 V-shaped concentric ceramic-embedded regulating ball valve
CN201779279U (en) * 2010-09-20 2011-03-30 天工阀门集团有限公司 Triple eccentric metal hard sealing butterfly valve with access hole
KR20160004167U (en) * 2015-05-28 2016-12-07 에이치엠하이테크 주식회사 Globe Valve with improved assembility
JP2017172755A (en) * 2016-03-25 2017-09-28 共栄バルブ工業株式会社 Spherical valve
CN108612862A (en) * 2018-07-19 2018-10-02 开维喜阀门集团有限公司 It is a kind of can on-line maintenance eccentric half-ball valve
CN109764145A (en) * 2019-02-01 2019-05-17 天津富赛克流体控制设备有限公司 A kind of resin industrial and mineral hard seal fixing ball valve
CN210830521U (en) * 2019-09-25 2020-06-23 河南泉舜流体控制科技有限公司 Butt welding rotary ball valve with purging function
CN211537742U (en) * 2019-12-26 2020-09-22 湖南库泠斯特科技有限公司 Novel cooling heat dissipation type chemical industry reation kettle

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Publication number Priority date Publication date Assignee Title
CN201621313U (en) * 2009-12-02 2010-11-03 河南泉舜流体控制科技有限公司 V-shaped concentric ceramic-embedded regulating ball valve
CN201779279U (en) * 2010-09-20 2011-03-30 天工阀门集团有限公司 Triple eccentric metal hard sealing butterfly valve with access hole
KR20160004167U (en) * 2015-05-28 2016-12-07 에이치엠하이테크 주식회사 Globe Valve with improved assembility
JP2017172755A (en) * 2016-03-25 2017-09-28 共栄バルブ工業株式会社 Spherical valve
CN108612862A (en) * 2018-07-19 2018-10-02 开维喜阀门集团有限公司 It is a kind of can on-line maintenance eccentric half-ball valve
CN109764145A (en) * 2019-02-01 2019-05-17 天津富赛克流体控制设备有限公司 A kind of resin industrial and mineral hard seal fixing ball valve
CN210830521U (en) * 2019-09-25 2020-06-23 河南泉舜流体控制科技有限公司 Butt welding rotary ball valve with purging function
CN211537742U (en) * 2019-12-26 2020-09-22 湖南库泠斯特科技有限公司 Novel cooling heat dissipation type chemical industry reation kettle

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Title
矫永臣;曲树蓁;刘永刚;: "耐磨耐腐蚀球阀结构的改进", 管道技术与设备, no. 01, pages 32 - 34 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230131017A1 (en) * 2021-10-27 2023-04-27 Hamilton Sundstrand Corporation Ball valve system with ball mounted seal
CN114576384A (en) * 2022-02-17 2022-06-03 国工控股集团有限公司 Bidirectional sealing C-shaped ball valve

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