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WO2009026737A1 - Robinet à tournant sphérique fixe - Google Patents

Robinet à tournant sphérique fixe Download PDF

Info

Publication number
WO2009026737A1
WO2009026737A1 PCT/CN2007/002559 CN2007002559W WO2009026737A1 WO 2009026737 A1 WO2009026737 A1 WO 2009026737A1 CN 2007002559 W CN2007002559 W CN 2007002559W WO 2009026737 A1 WO2009026737 A1 WO 2009026737A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
seat
ball
spring
way
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.)
Ceased
Application number
PCT/CN2007/002559
Other languages
English (en)
Chinese (zh)
Inventor
Jinquan Qiu
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.)
FAN FANDY
Original Assignee
FAN FANDY
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 FAN FANDY filed Critical FAN FANDY
Priority to PCT/CN2007/002559 priority Critical patent/WO2009026737A1/fr
Publication of WO2009026737A1 publication Critical patent/WO2009026737A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F16K5/08—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
    • F16K5/205—Sealing effected by the flowing medium

Definitions

  • the invention relates to a ball valve, in particular to a fixed ball valve.
  • Fig. 1 which includes a valve stem 1, a valve body 2 and a ball body 4.
  • the ball body 4 is placed in the valve chamber 10 of the valve body 2, and is fixed between the connecting bodies through the ball fixing plate 15.
  • the valve body 2 is connected to the upstream and downstream pipes through the connecting bodies 3, 9.
  • a valve seat 5, 8 is disposed between the connecting body 3, 9 and the ball 4, and a valve seat sealing ring 6, 16 is respectively disposed between the valve seat 5, 8 and the ball 4 for preventing fluid in the pipe from passing through the valve cavity 10 Enter the downstream pipeline.
  • a valve seat spring is arranged between the valve seat and the connecting body. Under the action of the pressure of the fluid in the pipe and the spring force of the valve seat, the valve seats 5, 8 move toward the ball 4, so that the seat ring seals 6, 16 are pressed against On the ball 4 to ensure the sealing of the ball valve.
  • the commonly used valve stem 1 has a cylindrical shape in the middle and a drum shape in the bottom. As shown in Fig. 5, the bottom end of the stem 1 extends into a rectangular recess at the top of the sphere 4, and is connected to the sphere 4 by a close fit with the rectangular recess. In use, the valve stem 1 is rotated, and the ball 4 is rotated to realize the opening and closing of the ball valve.
  • the fixed ball valve of this structure mainly relies on the seat sealing ring to achieve the sealing performance of the ball valve.
  • an oil passage (not shown) leading to the ball valve is provided in the connecting body, and the valve seat is provided with a passage.
  • the 7-end of the emergency seal oil passage communicates with the oil passage, and the other end leads to the seat seal and communicates with the pipeline.
  • An oil passage seal 12, 13 is provided between the valve seat and the connecting body for ensuring a seal between the valve seat and the connecting body.
  • the sealing oil is injected through the oil passage and the emergency sealing oil hole 7 by the oil filling nozzle, and a sealing oil film is formed between the valve seat and the connecting body, and between the ball body 4 and the valve seat sealing ring, so that It is possible to temporarily reduce or eliminate the leakage between the valve seat and the connecting body, and between the valve seat and the ball.
  • the fixed ball of this structure is wide during use.
  • the rotating ball needs to overcome the friction between the valve seat and the ball from closing to opening.
  • the wider the ball the greater the torque required to open the ball valve.
  • Current switches for operating large ball valves can use pneumatic, hydraulic or electric actuators, which are costly.
  • the technical problem to be solved by the present invention is to provide a fixed ball valve which can significantly reduce the torque during the process of opening and closing the ball valve, thereby saving the cost of the actuator.
  • the technical solution of the fixed ball width of the present invention comprises: a valve stem, a valve body, a ball body, a connecting body, a valve seat, a ball fixing plate, and an emergency sealing oil hole in the wide seat;
  • a fixed seat ball valve is provided with a valve seat moving device that moves the valve seat by the action of fluid pressure in the pipe.
  • the valve seat moving device includes a one-way valve passing through a pipe to a flow passage and a flow passage between the valve seat and the oil storage chamber between the balls; the valve seat moving device introduces fluid in the pipe between the valve seat and the ball
  • the oil storage chamber controls the flow of the fluid in the oil storage chamber through a one-way valve;
  • the angle between the wide rod and the mating surface of the ball is used to delay the rotation of the ball to provide time for separating the valve seat; the rotation of the valve stem opens the check valve to allow fluid in the pipe to flow between the valve seat and the ball.
  • the oil storage chamber uses the pressure of the fluid itself in the oil storage chamber to separate the valve seat from the ball and then performs the switching operation of the ball valve.
  • the technical effect that can be achieved by the invention is: During the process of switching the ball valve, the valve seat is separated from the sphere by the action of the fluid pressure in the pipeline, and then the switching action of the ball valve is performed, thereby significantly reducing the torque during the switching of the ball. This saves the cost of the actuator.
  • the invention can also reduce or even eliminate the friction between the wide seat and the ball when the ball valve is switched, thereby prolonging the service life of the ball valve.
  • Figure 1 is a schematic view showing the structure of a conventional fixed ball valve
  • FIG. 2 is a schematic structural view of a valve stem of a commonly used fixed ball
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2;
  • Figure 4 is a cross-sectional view taken along line B-B of Figure 2;
  • Figure 5 is a schematic view of the cooperation between the bottom end of the valve stem and the rectangular recess at the top of the ball;
  • Figure 6 is a partial enlarged view of C in Figure 1;
  • Figure 7 is a schematic structural view of the fixed ball valve of the present invention.
  • Figure 8 is a schematic view of the valve stem of the present invention.
  • Figure 9 is a cross-sectional view taken along line A-A of Figure 8.
  • Figure 10 is a schematic view showing the cooperation of the bottom end of the valve stem and the rectangular recess of the top of the ball;
  • Figure 11 is a schematic view of the push rod of the present invention at the lowest point of the valve stem groove
  • Figure 12 is a schematic view of the push rod of the present invention at the highest point of the stem of the valve stem;
  • Figure 13 is a schematic structural view of a flow guiding check valve of the present invention.
  • Figure 14 is a partial enlarged view of D in Figure 7;
  • Figure 15 is a schematic view showing the structure of the valve seat of the present invention.
  • the fixed ball valve of the present invention comprises a valve stem 21, a valve body 2, an upstream connecting body 3, a ball body 4, an upstream valve seat 25, a downstream valve seat 28, a downstream connecting body 9, a ball fixing plate 151, A wide seat moving device is respectively arranged on the downstream valve seat.
  • the valve seat moving device includes a flow guiding check valve 31, a push rod 32, and a thrust ring 33.
  • the middle portion of the valve stem 21 is provided with a groove in the axial direction, and the four grooves are evenly distributed in the circumferential direction.
  • the mating surface of the bottom of the valve stem 21 and the drum-shaped groove at the top of the ball 4 is a slope, and the inclined surface forms an angle ⁇ with the drum-shaped groove.
  • the connecting body 3 is provided with a one-way valve passage, and the one-way valve passage is in communication with the emergency sealing oil passage 7.
  • the flow guiding check valve 31 is disposed in the one-way valve passage, and the flow guiding check valve 31 includes a guiding seat 51, a valve plug 52, a one-way valve wide sealing ring 54, a one-way valve base spring 55, a one-way valve spring seat 56.
  • a sealing ring is arranged between the flow guiding check valve 31 and the one-way valve passage. In this embodiment, four sealing rings are provided.
  • valve plug 52 is disposed in the one-way wide body 57, and the one-way valve wide seal ring 54 is disposed between the plug 52 and the check valve body 57, and the bottom of the valve plug 52 is provided with a one-way
  • the valve base spring 55, the check valve base spring 55 is positioned by the check valve spring seat 56 at the bottom of the check valve body 57, and the check valve spring seat 56 and the check valve body 57 are screwed.
  • a one-way valve oil reservoir 61 is formed between the valve plug 52 and the one-way valve spring seat 56.
  • Valve plug 52 and one-way wide A sealing ring is provided between the valve bodies 57 to ensure a sealing effect between the valve plug 52 and the check valve body 57.
  • the top of the valve plug 52 is tapered, and the tapered bevel on the top of the valve plug 52 is slidably fitted with the semi-wedge guide seat 51.
  • a guide spring 58 is provided in the 51, and the guide spring 58 is positioned by the guide spring seat 60.
  • the guide spring seat 60 is threadedly connected to the check valve body 57.
  • the flow-through check valve 31 is fixed to the connecting body by the top wire of the top.
  • a spring seat oil passage 62 is defined in the one-way valve spring seat 56, and the spring seat oil passage 62 communicates with the emergency seal oil passage 7 in the upstream wide seat 25 to connect the flow guide check valve 31 with the emergency seal oil passage 7.
  • Spring seat oil gallery 62 has a filter at the entrance.
  • a check valve oil passage is provided in the middle of the check valve body 57.
  • the one-way valve oil passage 53 communicates with the pilot oil passage 35 in the connecting body.
  • the top end of the push rod 32 abuts against the groove in the middle of the valve stem 21, and the tail end abuts against the switch that guides the one-way wide 31, that is, the guide seat 51.
  • a push rod spring 34 is provided at the end of the push rod 32, and the push rod spring 34 can reset the push rod 32.
  • the outer ring of the valve seat is provided with a boss, and a valve seat outer sealing ring 11 is arranged between the boss and the connecting body.
  • the thrust collar 33 is disposed between the upstream valve seat 25, the connecting body 3 and the ball 4.
  • the thrust ring 33 can be positioned by the pin and fixed to the side of the ball fixing plate 151, as shown in FIG. 7; and for the large ball valve with a high position of the ball fixing plate 151, Then, the thrust ring 33 can be connected to the connecting body 3 by screws.
  • the oil reservoir HI is formed between the boss of the upstream valve seat 25, the thrust ring 33 and the connecting body 3, and the flow guiding oil passage 35 of the connecting body 3 communicates with the oil storage chamber HI.
  • the seat outer seal 11 serves to seal the oil reservoir HI.
  • the thrust ring 33 is provided with a drain passage 36 leading to the cabinet cavity, and the drain passage 36 is connected to the oil storage chamber HI and the wide chamber.
  • the outlet diameter of the drain 36 is slightly smaller than the diameter of the drain 36 and can act as a buffer.
  • the valve stem 21 When the ball valve is opened, the valve stem 21 is rotated, and the cam principle is used, as shown in FIG. 11 and FIG. 12, the tip end of the push rod 32 is moved from the lowest point of the groove to the highest point of the groove, as the valve stem 21 rotates.
  • the pusher 32 is pushed, and the guide spring 58 is compressed to move the guide seat 51 in the center direction of the flow check valve 31.
  • the movement of the guide seat 51 pushes the valve plug 52 downward to separate the valve plug 52 from the check valve plug seal 54 to open the flow control check valve 31.
  • the initial rotation of the valve stem 21 does not cause the ball 4 to rotate.
  • the fluid in the pipeline can pass through the emergency seal oil passage 7, the check valve reservoir 61, into the one-way wide oil passage 53, and along the diversion passage 35 in the joint body 3.
  • the oil reservoir HI flows into the valve chamber through the drain passage 36 of the thrust collar 33. Since the outlet diameter of the drain passage 36 is smaller than the inner diameter of the drain passage 36, the pressure in the oil reservoir HI is further increased.
  • the fluid in the oil storage chamber HI can generate a thrust force on the upstream valve seat 25, since the thrust is greater than the sum of the elastic force of the valve seat spring and the pressure of the pipe fluid to the valve seat, and the direction is opposite, thereby enabling the upstream valve seat 25 and the sphere 4 separation.
  • the angle ⁇ formed between the bottom of the stem 21 and the drum-shaped recess at the top of the ball 4 serves to delay the rotation of the ball 4.
  • the valve stem 21 rotates over the angle ⁇ formed by the bottom surface of the valve stem 21 and the mating surface of the top of the ball 4
  • the valve stem 21 can drive the ball 4 to rotate, and at this time, the wide seat and the spherical body 4 have Separating and rotating the valve stem 21 eliminates the need to overcome the friction between the valve seat and the ball 4, thereby achieving a significant reduction in torque during the switching of the ball valve, thereby eliminating the need to use a large actuator.
  • the valve seat and the ball are separated when the ball valve is opened, the friction between the valve seat and the ball is eliminated, thereby reducing the wear of the valve seat and prolonging the service life of the ball valve.
  • valve stem 21 When the valve stem 21 is rotated through 90°, the ball valve is fully open. At this time, the push rod 32 enters the next groove of the valve stem 21, and under the elastic force of the push rod spring 34, the push rod 32 is reset and diverted. The check valve 31 is closed to stop the flow of fluid in the oil reservoir HI. The seat is reset by the spring force of the seat spring.
  • valve stem 21 is rotated to move the push rod 32, and the flow guiding check valve 31 is opened, so that the fluid in the pipe flows into the oil storage chamber H1, and the fluid in the oil storage chamber HI pushes the valve seat, so that After the valve seat is separated from the ball 4, the ball 4 is rotated to close the ball.
  • the invention is provided with a valve seat moving device on the upper and lower valve seats respectively, so that in the process of switching the ball valve, the pressure of the fluid in the pipe can be utilized to separate the valve seat from the ball and then rotate the ball, which can significantly reduce the process of opening and closing the ball valve. Friction and its torque.

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

Abstract

L'invention concerne un type de robinet à tournant sphérique fixe, constitué d'une tige (21), d'un corps de robinet (2), d'un corps (4) de tournant sphérique, d'un corps de raccord (3, 9), d'un siège (25, 28) et d'une plaque fixe (151) de tournant sphérique. Ce robinet comprend un levier de siège qui permet au fluide d'une conduite de pénétrer dans une chambre (H1) de stockage d'huile se situant entre le siège (25, 28) et le corps (4) de tournant sphérique, le siège (25, 28) étant déplacé par la pression du fluide de la conduite. Le corps (4) de tournant sphérique peut être retardé pour tourner selon l'angle formé entre la tige (21) et le corps (4) de tournant sphérique, afin de laisser au siège (25, 28) le temps de se séparer. Comme le siège (25, 28) se sépare du corps (4) de tournant sphérique pendant une opération d'ouverture/fermeture sous l'action de la pression du fluide dans la chambre (H1) de stockage d'huile, le couple de l'opération d'ouverture/fermeture est considérablement réduit, ce système permettant d'économiser le coût d'un actionneur.
PCT/CN2007/002559 2007-08-24 2007-08-24 Robinet à tournant sphérique fixe Ceased WO2009026737A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/002559 WO2009026737A1 (fr) 2007-08-24 2007-08-24 Robinet à tournant sphérique fixe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/002559 WO2009026737A1 (fr) 2007-08-24 2007-08-24 Robinet à tournant sphérique fixe

Publications (1)

Publication Number Publication Date
WO2009026737A1 true WO2009026737A1 (fr) 2009-03-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/002559 Ceased WO2009026737A1 (fr) 2007-08-24 2007-08-24 Robinet à tournant sphérique fixe

Country Status (1)

Country Link
WO (1) WO2009026737A1 (fr)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234057A (zh) * 2013-04-04 2013-08-07 邱金全 一种新型高压时微扭矩球阀
CN104913078A (zh) * 2015-06-18 2015-09-16 嘉兴五洲阀门有限公司 一种油气管道全焊接球阀
CN105465401A (zh) * 2015-12-31 2016-04-06 宁波丰基特种阀门有限公司 易于更换阀座的球阀
CN107830199A (zh) * 2017-10-20 2018-03-23 上海阀门厂股份有限公司 一种阀门撑开机构
WO2018210037A1 (fr) * 2017-05-19 2018-11-22 江苏神通阀门股份有限公司 Clapet à bille à micro-couple
CN110905444A (zh) * 2019-11-22 2020-03-24 中国石油天然气股份有限公司 一种气井远程控压调节急断装置及其使用方法
WO2020222753A1 (fr) * 2019-04-29 2020-11-05 Halliburton Energy Services, Inc. Procédé de chargement avancé pour coupe à rotation de bille et son procédé d'utilisation
CN112413201A (zh) * 2020-12-24 2021-02-26 王靖崇 一种管道燃气安全自闭阀
CN112460281A (zh) * 2020-11-26 2021-03-09 四川苏克流体控制设备有限公司 一种超低温顶装球阀
CN112648415A (zh) * 2020-12-15 2021-04-13 安徽银通物联有限公司 一种用于水流控制的单向球阀
CN112984146A (zh) * 2021-02-05 2021-06-18 陕西蓝箭航天技术有限公司 一种用于液体火箭发动机的球阀装置
CN113503388A (zh) * 2021-08-02 2021-10-15 江苏亿阀股份有限公司 具有侧向可调式分离联动机构的八通换向球阀
CN113803490A (zh) * 2021-11-01 2021-12-17 陈功强 一种半球阀
CN113983194A (zh) * 2021-10-18 2022-01-28 上海沪东造船阀门有限公司 双燃料柴油机用球阀
CN114215929A (zh) * 2021-12-17 2022-03-22 江苏瑞润隆机械有限公司 一种具有良好密闭性的球阀及其使用方法
CN114658869A (zh) * 2022-03-28 2022-06-24 黄山市汇润机械有限公司 应用于泥浆泵的凡尔阀结构
CN116241679A (zh) * 2023-03-03 2023-06-09 江苏远洋阀门智控股份有限公司 快速截断介质气液动球阀
CN116428382A (zh) * 2023-03-20 2023-07-14 浙江良固特种阀门有限公司 一种具有超压保护功能的浮动球阀
CN118423472A (zh) * 2024-04-25 2024-08-02 阿伐流体控制有限公司 一种煤化工用三偏心c型耐磨球阀
CN119267585A (zh) * 2024-10-14 2025-01-07 四川精控阀门制造有限公司 大口径顶装式球阀及其装配方法、维护方法和维修方法
CN119712909A (zh) * 2025-02-28 2025-03-28 中阀控股（集团）有限公司 一种可自动泄压的高安全性球阀

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WO1991019921A1 (fr) * 1990-06-20 1991-12-26 Den Norske Stats Oljeselskap A/S Dispositif de vanne, grande vanne spherique en particulier
JPH04140578A (ja) * 1990-10-01 1992-05-14 Taimei Kinzoku Kogyo Kk ボールバルブ
CN1073247A (zh) * 1991-12-14 1993-06-16 中国人民解放军后勤工程学院 摆动球低力矩球阀
CN1757959A (zh) * 2005-11-10 2006-04-12 邱金全 高压时无扭距球阀
CN2828475Y (zh) * 2005-02-21 2006-10-18 李冲 无摩擦液动球阀
CN2851756Y (zh) * 2005-11-10 2006-12-27 邱金全 高压时无扭距球阀

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991019921A1 (fr) * 1990-06-20 1991-12-26 Den Norske Stats Oljeselskap A/S Dispositif de vanne, grande vanne spherique en particulier
JPH04140578A (ja) * 1990-10-01 1992-05-14 Taimei Kinzoku Kogyo Kk ボールバルブ
CN1073247A (zh) * 1991-12-14 1993-06-16 中国人民解放军后勤工程学院 摆动球低力矩球阀
CN2828475Y (zh) * 2005-02-21 2006-10-18 李冲 无摩擦液动球阀
CN1757959A (zh) * 2005-11-10 2006-04-12 邱金全 高压时无扭距球阀
CN2851756Y (zh) * 2005-11-10 2006-12-27 邱金全 高压时无扭距球阀

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103234057A (zh) * 2013-04-04 2013-08-07 邱金全 一种新型高压时微扭矩球阀
CN103234057B (zh) * 2013-04-04 2015-09-16 邱金全 一种新型高压时微扭矩球阀
CN104913078A (zh) * 2015-06-18 2015-09-16 嘉兴五洲阀门有限公司 一种油气管道全焊接球阀
CN105465401A (zh) * 2015-12-31 2016-04-06 宁波丰基特种阀门有限公司 易于更换阀座的球阀
WO2018210037A1 (fr) * 2017-05-19 2018-11-22 江苏神通阀门股份有限公司 Clapet à bille à micro-couple
CN107830199A (zh) * 2017-10-20 2018-03-23 上海阀门厂股份有限公司 一种阀门撑开机构
US12055003B2 (en) 2019-04-29 2024-08-06 Halliburton Energy Services, Inc. Advanced loading method for ball rotation cutting and method of use therefor
WO2020222753A1 (fr) * 2019-04-29 2020-11-05 Halliburton Energy Services, Inc. Procédé de chargement avancé pour coupe à rotation de bille et son procédé d'utilisation
CN110905444A (zh) * 2019-11-22 2020-03-24 中国石油天然气股份有限公司 一种气井远程控压调节急断装置及其使用方法
CN110905444B (zh) * 2019-11-22 2023-07-25 中国石油天然气股份有限公司 一种气井远程控压调节急断装置及其使用方法
CN112460281A (zh) * 2020-11-26 2021-03-09 四川苏克流体控制设备有限公司 一种超低温顶装球阀
CN112648415A (zh) * 2020-12-15 2021-04-13 安徽银通物联有限公司 一种用于水流控制的单向球阀
CN112648415B (zh) * 2020-12-15 2023-10-13 安徽银通物联有限公司 一种用于水流控制的单向球阀
CN112413201A (zh) * 2020-12-24 2021-02-26 王靖崇 一种管道燃气安全自闭阀
CN112984146A (zh) * 2021-02-05 2021-06-18 陕西蓝箭航天技术有限公司 一种用于液体火箭发动机的球阀装置
CN112984146B (zh) * 2021-02-05 2023-01-13 陕西蓝箭航天技术有限公司 一种用于液体火箭发动机的球阀装置
CN113503388A (zh) * 2021-08-02 2021-10-15 江苏亿阀股份有限公司 具有侧向可调式分离联动机构的八通换向球阀
CN113503388B (zh) * 2021-08-02 2023-09-26 江苏亿阀股份有限公司 具有侧向可调式分离联动机构的八通换向球阀
CN113983194A (zh) * 2021-10-18 2022-01-28 上海沪东造船阀门有限公司 双燃料柴油机用球阀
CN113803490A (zh) * 2021-11-01 2021-12-17 陈功强 一种半球阀
CN114215929A (zh) * 2021-12-17 2022-03-22 江苏瑞润隆机械有限公司 一种具有良好密闭性的球阀及其使用方法
CN114658869A (zh) * 2022-03-28 2022-06-24 黄山市汇润机械有限公司 应用于泥浆泵的凡尔阀结构
CN116241679A (zh) * 2023-03-03 2023-06-09 江苏远洋阀门智控股份有限公司 快速截断介质气液动球阀
CN116241679B (zh) * 2023-03-03 2023-09-08 江苏远洋阀门智控股份有限公司 快速截断介质气液动球阀
CN116428382A (zh) * 2023-03-20 2023-07-14 浙江良固特种阀门有限公司 一种具有超压保护功能的浮动球阀
CN116428382B (zh) * 2023-03-20 2023-10-20 浙江良固特种阀门有限公司 一种具有超压保护功能的浮动球阀
CN118423472A (zh) * 2024-04-25 2024-08-02 阿伐流体控制有限公司 一种煤化工用三偏心c型耐磨球阀
CN119267585A (zh) * 2024-10-14 2025-01-07 四川精控阀门制造有限公司 大口径顶装式球阀及其装配方法、维护方法和维修方法
CN119712909A (zh) * 2025-02-28 2025-03-28 中阀控股（集团）有限公司 一种可自动泄压的高安全性球阀

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