WO2010135902A1 - 高低压导阀 - Google Patents

高低压导阀 Download PDF

Info

Publication number
WO2010135902A1
WO2010135902A1 PCT/CN2009/076323 CN2009076323W WO2010135902A1 WO 2010135902 A1 WO2010135902 A1 WO 2010135902A1 CN 2009076323 W CN2009076323 W CN 2009076323W WO 2010135902 A1 WO2010135902 A1 WO 2010135902A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
cavity
low pressure
chamber
pilot valve
Prior art date
Application number
PCT/CN2009/076323
Other languages
English (en)
French (fr)
Inventor
梅宗清
梅宗斌
Original Assignee
泸州川油钻采工具有限公司
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 泸州川油钻采工具有限公司 filed Critical 泸州川油钻采工具有限公司
Publication of WO2010135902A1 publication Critical patent/WO2010135902A1/zh

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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston

Definitions

  • the present invention relates to a valve for safe production of the oil and gas wellhead, and more particularly to a high and low pressure pilot valve in which a pilot valve is improved.
  • the control methods for ground safety valves and underwater safety valves widely used in oil and gas wellheads are mainly: pneumatic control, hydraulic control, and gas-hydraulic combined control.
  • the core component of all control systems is the Pilot. Due to the high pressure application of the piston valve body that is not suitable for oil and gas wellheads, and the cylindrical spool has high requirements on the perpendicularity of the two sealing faces, the spool is required. Deviation can lead to seal failure.
  • the valve core of the pilot valve is installed in the through hole of the valve body, and one end of the valve core is a pressure detecting end. The other end is fitted with an elastic return element. There are two "0"-shaped sealing elements on the valve core. There are fluid passages between the two "0"-shaped sealing elements. When the pressure at the pressure detecting end exceeds the predetermined value, the elastic returning element and Under the joint action of the pressure, the spool moves to communicate with the inlet and outlet of the valve body.
  • the spool "0"-shaped sealing element of the pilot valve of the spool type structure is reciprocating The through position of the axial hole and the radial hole.
  • the metal corners will cause different degrees of damage to the "0"-shaped sealing element, and the greater the pressure, the greater the degree of damage.
  • the opening and closing of the slide valve can only be realized after the "0"-shaped sealing element passes through the oil passage.
  • the object of the present invention is to provide a new way to achieve pilot valve alignment in view of the deficiencies of the prior art.
  • a high and low pressure pilot valve includes a valve body having an inlet and an outlet, a valve chamber in the valve body, a valve core installed in the valve chamber extending from the valve chamber at both ends, one end being a pressure detecting end, and the other end being mounted with an elastic returning element
  • the valve chamber has a first cavity and a second cavity adjacent thereto, and a sealing surface is arranged at the boundary therebetween, and the first cavity and the second cavity are respectively communicated with the inlet and the outlet, respectively, at the valve
  • a section of the core is a cone valve, and the conical surface of the cone valve cooperates with the sealing surface to form a seal.
  • the diameter of the first cavity is larger than that of the second cavity, the step at the junction of the two forms a sealing surface, and the end of the larger diameter of the cone valve is located in the first cavity.
  • the pressure detecting end is located outside the first cavity
  • the elastic returning element is mounted outside the second cavity.
  • the elastic restoring element is mounted outside the first cavity and the pressure sensing end is located outside of the second cavity.
  • the elastic returning member comprises a spring seat fixed to the valve body extending out of the valve chamber section, and a spring mounted between the spring seat and the body.
  • an annular projection at the interface between the first cavity and the second cavity forms a sealing surface.
  • the present invention is achieved by: sensing the pressure difference between the pressure and the spring thrust to urge the poppet valve to reciprocate, and using the metal cone to face the passage between the inlet and the outlet for high-precision opening and closing of the valve.
  • the beneficial effects of the invention are as follows:
  • the interface end of the entire valve body is the same as the interface end of the current spool valve structure, and is easy to be widely used in the oil and gas wellhead, and the contact sealing effect between the cone valve and the sealing surface is good, and it is not easy to wear and leak, and
  • the opening degree of the cone valve can be related to the pressure of the arm. For example, the speed at which the high pressure pilot valve is opened is proportional to the pressure, and the speed at which the low pressure pilot valve is opened is inversely proportional to the pressure.
  • the entire pilot valve has high sensitivity, good responsiveness, quick action, high repeatability, high reset accuracy, good reliability and durability.
  • FIG. 1 is a schematic view showing the closing of a spool valve type in the prior art.
  • Fig. 2 is a schematic view showing the spool type pilot valve of Fig. 1 in an open state.
  • Figure 3 is a schematic illustration of an embodiment of the high and low pressure pilot valve of the present invention in a closed state.
  • Figure 4 is a schematic illustration of the embodiment of Figure 3 in an open state.
  • Figure 5 is a schematic illustration of another embodiment of the high and low pressure pilot valve of the present invention in a closed state.
  • Figure 6 is a schematic view of the embodiment shown in Figure 5 in an open state. detailed description
  • a high and low pressure pilot valve includes a valve body having an inlet and an outlet, a valve chamber in the valve body, and a valve core installed in the valve chamber to extend at both ends Out of the valve chamber, one end is the pressure detecting end, that is, the spool tail 2, and the other end is equipped with an elastic returning element, the valve chamber has a first cavity and a second cavity adjacent thereto, the diameter of the first cavity is larger than The second cavity, the step at the junction of the two forms a sealing surface, and the one end of the larger diameter of the cone valve is located in the first cavity, and a sealing surface is arranged at the junction of the first cavity and the second cavity respectively with the inlet and the outlet Connected, there is a section on the valve core as a cone valve, and the conical surface of the cone valve cooperates with the sealing surface to form a seal.
  • the elastic returning element is mounted outside the first cavity and the pressure sens
  • the resilient return member includes a spring seat 4 secured to the core extending over the valve chamber section, and a spring 5 mounted between the spring seat 4 and the valve body.
  • the high and low pressure pilot valve in the above embodiment operates in the following manner: when the sensed pressure 10 of the spool tail 1 is higher than the preset pressure, the pressure of the sense pressure 10 to the poppet valve 3 is greater than that of the spring 5 to the poppet valve 3. thrust.
  • the spool 1 transmits the sensed pressure 10 to the poppet valve 3, which in turn acts on the spring seat 4, forces the spring 5 to compress, the poppet valve 3 moves in the direction of the spring 5, and the poppet valve 3 is pushed away.
  • the oil in the inlet 6 enters the outlet 7 through this passage. As the sense pressure 10 increases, the passage will increase until the pilot valve is fully opened, opening the pilot valve.
  • a specific embodiment 2 of the present invention is a high and low pressure pilot valve comprising a valve body having an inlet and an outlet, wherein the valve body has a valve chamber, the valve core is installed in the valve chamber and the two ends extend out of the valve chamber, and one end is a pressure detecting end.
  • the valve chamber has a first cavity and a second cavity adjacent thereto, and the diameter of the first cavity is larger than that of the second cavity,
  • the step at the junction constitutes a sealing surface, and the larger end of the diameter of the cone valve is located in the first cavity, and a junction is provided at a junction thereof, and the first cavity and the second cavity are respectively communicated with the inlet and the outlet, on the valve core
  • One section is a cone valve, and the conical surface of the cone valve cooperates with the sealing surface to form a seal.
  • the pressure detecting end is located outside the first cavity, and the elastic returning element is mounted outside the second cavity.
  • the operation mode of this embodiment is as follows: When the pressure applied to the tail portion 9 of the poppet valve is lower than the preset pressure, the thrust of the spring 5 to the poppet valve 3 is greater than the force of the sense pressure 10 to the poppet valve 3.
  • the spring 5 transmits the thrust to the poppet valve 3 through the spring seat 4 and the spool 1, forcing the poppet valve 3 to move toward the tail portion 9 of the poppet valve, and the poppet valve 3 is pushed open.
  • the oil in the inlet 6 enters the outlet 7 through this passage.
  • the sense pressure 10 decreases, the speed at which the poppet valve 3 opens will be faster until the pilot valve is fully opened to effect the opening of the pilot valve.
  • a specific embodiment 3 of the present invention is a high and low pressure pilot valve comprising a valve body having an inlet and an outlet, wherein the valve body has a valve chamber, the valve core is installed in the valve chamber and the two ends extend out of the valve chamber, and one end is a pressure detecting end. , that is, the spool tail portion 2, the other end is equipped with an elastic returning element, the first cavity and the second cavity adjacent thereto are in the cavity, and an annular protrusion is formed at the interface between the first cavity and the second cavity
  • the sealing surface is formed, and the first cavity and the second cavity are respectively communicated with the inlet and the outlet, and a segment of the valve core is a cone valve, and the conical surface of the cone valve cooperates with the sealing surface to form a seal.
  • the elastic returning element is mounted on the outside of the first cavity, and the pressure detecting end is located outside the second cavity.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Safety Valves (AREA)

Description

高低压导阀 技术领域 本发明涉及本石油天然气井口安全生产中的阀， 尤其是一种改进了其中导 阀的高低压导阀。 背景技术 石油天然气井口广泛使用的地面安全阀和水下安全阀釆用的控制方式主要 有： 气动控制、 液动控制、 气液动联合控制。 所有控制系统的核心部件是感测 导阀 （Pi lot ), 由于活塞式阀体的不适合石油天然气井口的高压应用， 并且其 圓柱阀芯对两个密封面的垂直度要求高， 阀芯的偏差会导致密封失效， 目前国 内外一般釆用为滑阀式结构， 如图 1和图 2所示， 导阀的阀芯安装在阀体内的 通孔中， 阀芯的一端为压力检测端， 另一端安装弹性复位元件， 在阀芯上有两 个 "0" 形密封元件， 两个 "0" 形密封元件之间有流体通道， 当压力检测端的 压力超过预订值时， 在弹性复位元件和压力的共同作用下， 阀芯移动连通阀体 上的进口和出口， 该结构的存在以下问题： 1、 滑阀式结构的导阀的阀芯 "0" 形密封元件在作往复动作时， 均要通过轴向孔与径向孔的贯通位置。 当 "0" 形 密封元件运动到此位置时， 金属棱角就会对 "0" 形密封元件造成程度不同的损 伤， 且压力越大损伤程度就越大， 次数越多损伤就越多， "0" 形密封元件受损 伤后其性能就会下降， 这就严重影响其性能。 2、 滑阀的开启和关闭是在 "0" 形密封元件通过油道以后才能实现。 即导阀最初感测到压力变化超出预设压力 时， 柱塞开始运动 （此时还不能开启导阀）， 但必须要等到 "0" 形密封元件过 了油道， 导阀才能接通。 为此其响应速度慢、 灵敏度不好。 发明内容
本发明的目的是针对现有技术的不足， 提供一种以全新方式实现导阀对进、 出油道开启和关闭控制的高低压导阀。
本发明的技术方案如下：
一种高低压导阀， 包括具有进口和出口的阀体， 阀体中有阀腔， 阀芯安装在 阀腔中两端延伸出阀腔， 一端为压力检测端， 另一端安装有弹性复位元件， 其 特征在于， 阀腔内有第一腔体和与之相邻的第二腔体， 二者交界处有一密封面， 第一腔体和第二腔体分别与进口和出口连通， 在阀芯上有一段为锥阀， 锥阀的 圓锥面与密封面相配合形成密封。
本发明的附加技术方案如下：
优选地， 第一腔体的直径大于第二腔体， 二者交界处的台阶构成密封面， 锥 阀直径大的一端位于第一腔体中。
优选地，压力检测端位于第一腔体外侧，弹性复位元件安装在第二腔体外侧。 优选地，弹性复位元件安装在第一腔体外侧，压力检测端位于第二腔体外侧。 优选地， 所述的弹性复位元件包括固定在阀芯延伸出阀腔段上的弹簧座， 以 及安装在弹簧座和阃体之间的弹簧。
优选地， 第一腔体和第二腔体交界处有一环形的凸起构成密封面。
本发明是这样实现的： 通过感测压力与弹簧推力之间的压力差来推动锥阀作 往复运动， 利用金属锥面对进、 出口之间的通道进行高精度的开启和关阀。
本发明的有益效果如下： 整个阀体的接口端与现行滑阀式结构的接口端相 同， 易于在石油天然气井口广泛使用， 锥阀与密封面之间的接触密封效果好， 不易磨损泄漏， 并且锥阀的开启度可以和压力成臂力关系， 如： 高压导阀开启 的速度与压力成正比， 低压导阀开启的速度与压力成反比。 整个导阀的感测灵 敏度高、 响应性好、 动作迅速、 重复精度高、 复位精度高、 可靠性好、 耐用性 强。 附图说明
本发明将通过例子并参照附图的方式说明， 其中： 图 1是现有技术中滑阀式导阀关闭示意图。
图 2是图 1所示滑阀式导阀处于开启状态的示意图。
图 3是本发明高低压导阀的实施例处于关闭状态的示意图。
图 4是图 3所示实施例处于开启状态的示意图。
图 5是本发明高低压导阀的另一实施例处于关闭状态的示意图。
图 6图 5所示实施例处于开启状态的示意图。 具体实施方式
本发明的具体实施例 1 , 如图 3和图 4所示， 一种高低压导阀， 包括具有进 口和出口的阀体， 阀体中有阀腔， 阀芯安装在阀腔中两端延伸出阀腔， 一端为 压力检测端， 即阀芯尾部 2 , 另一端安装有弹性复位元件， 阀腔内有第一腔体和 与之相邻的第二腔体， 第一腔体的直径大于第二腔体， 二者交界处的台阶构成 密封面， 锥阀直径大的一端位于第一腔体中， 二者交界处有一密封面， 第一腔 体和第二腔体分别与进口和出口连通， 在阀芯上有一段为锥阀， 锥阀的圓锥面 与密封面相配合形成密封。 弹性复位元件安装在第一腔体外侧， 压力检测端位 于第二腔体外侧。
上述实施例中弹性元件的一种优选方案是： 弹性复位元件包括固定在阃芯延 伸出阀腔段上的弹簧座 4 , 以及安装在弹簧座 4和阀体之间的弹簧 5。
上述实施例中的高低压导阀运行方式如下：阀芯尾部 1的所受的感测压力 10 高于预设压力时， 感测压力 10对锥阀 3的压力大于弹簧 5对锥阀 3的推力。 阀 芯 1将感测压力 10传递给锥阀 3 , 锥阀 3又作用于弹簧座 4 , 迫使弹簧 5压缩， 锥阀 3向弹簧 5方向运动，锥阀 3被推开。进口 6内的油通过此通道进入出口 7。 随着感测压力 10的增加， 此通道就会增大， 直到导阀完全打开， 实现导阀的开 启。 当阀芯尾部 1的所受的感测压力 10低于预设压力时， 感测压力 10对锥阀 3 的压力小于弹簧 5对锥阀 3的推力。 弹簧 5复位， 迫使锥阀 3向阀芯尾部 1方 向运动。 锥阀 3关闭， 切断进、 出口之间的通道， 实现导阀的关闭。 本发明的具体实施例 2 , —种高低压导阀， 包括具有进口和出口的阀体， 阀 体中有阀腔， 阀芯安装在阀腔中两端延伸出阀腔， 一端为压力检测端， 即锥阀 尾部 9 , 另一端安装有弹簧座 4和弹簧 5 , 阀腔内有第一腔体和与之相邻的第二 腔体， 第一腔体的直径大于第二腔体， 二者交界处的台阶构成密封面， 锥阀直 径大的一端位于第一腔体中， 二者交界处有一密封面， 第一腔体和第二腔体分 别与进口和出口连通， 在阀芯上有一段为锥阀， 锥阀的圓锥面与密封面相配合 形成密封。 压力检测端位于第一腔体外侧， 弹性复位元件安装在第二腔体外侧。
本实施例的运行方式如下： 当锥阀尾部 9的所受的压力低于预设压力时， 弹 簧 5对锥阀 3的推力大于感测压力 10对锥阀 3的作用力。弹簧 5通过弹簧座 4、 阀芯 1将推力传递给锥阀 3 ,迫使锥阀 3向锥阀尾部 9方向运动，锥阀 3被推开。 进口 6内的油通过此通道进入出口 7。 随着感测压力 10的减小， 锥阀 3开启的 速度就会越快， 直到导阀完全打开， 实现导阀的开启。 当锥阀尾部 9 的所受的 感测压力 10大于预设压力时，感测压力 10对锥阀 3的压力大于弹簧 5对锥阀 3 的推力。 弹簧 5被压缩， 锥阀 3向弹簧 5方向运动。 锥阀 3关闭， 切断进、 出 口之间的通道， 实现导阀的关闭。
本发明的具体实施例 3 , —种高低压导阀， 包括具有进口和出口的阀体， 阀 体中有阀腔， 阀芯安装在阀腔中两端延伸出阀腔， 一端为压力检测端， 即阀芯 尾部 2 ,另一端安装有弹性复位元件，阃腔内有第一腔体和与之相邻的第二腔体， 第一腔体和第二腔体交界处有一环形的凸起构成密封面， 第一腔体和第二腔体 分别与进口和出口连通， 在阀芯上有一段为锥阀， 锥阀的圓锥面与密封面相配 合形成密封。 弹性复位元件安装在第一腔体外侧， 压力检测端位于第二腔体外 侧。 本说明书中公开的所有特征， 或公开的所有方法或过程中的步骤， 除了互相 排斥的特征和 /或步骤以外， 均可以以任何方式组合。 本说明书 （包括任何附加权利要求、 摘要和附图） 中公开的任一特征， 除非 特别叙述， 均可被其他等效或具有类似目的的替代特征加以替换。 即， 除非特 别叙述， 每个特征只是一系列等效或类似特征中的一个例子而已。 本发明并不局限于前述的具体实施方式。 本发明扩展到任何在本说明书中 披露的新特征或任何新的组合， 以及披露的任一新的方法或过程的步骤或任何 新的组合。

Claims

权 利 要 求 书
1、 一种高低压导阀， 包括具有进口和出口的阀体， 阀体中有阀腔， 阀芯安装在 阀腔中两端延伸出阀腔， 一端为压力检测端， 另一端安装有弹性复位元件， 其 特征在于， 阀腔内有第一腔体和与之相邻的第二腔体， 二者交界处有一密封面， 第一腔体和第二腔体分别与进口和出口连通， 在阀芯上有一段为锥阀， 锥阀的 圓锥面与密封面相配合形成密封。
2、 根据权利要求 1所述的高低压导阀， 其特征在于： 第一腔体的直径大于第二 腔体， 二者交界处的台阶构成密封面， 锥阀直径大的一端位于第一腔体中。
3、 根据权利要求 1或 2所述的高低压导阀， 其特征在于： 压力检测端位于第一 腔体外侧， 弹性复位元件安装在第二腔体外侧。
4、 根据权利要求 1或 2所述的高低压导阀， 其特征在于： 弹性复位元件安装在 第一腔体外侧， 压力检测端位于第二腔体外侧。
5、 根据权利要求 2所述的高低压导阀， 其特征在于： 所述的弹性复位元件包括 固定在阀芯延伸出阀腔段上的弹簧座， 以及安装在弹簧座和阀体之间的弹簧。
6、 根据权利要求 1所述的高低压导阀， 其特征在于： 第一腔体和第二腔体交界 处有一环形的凸起构成密封面。
PCT/CN2009/076323 2009-05-27 2009-12-31 高低压导阀 WO2010135902A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 200910059442 CN101561048B (zh) 2009-05-27 2009-05-27 低压导阀
CN200910059442.2 2009-05-27

Publications (1)

Publication Number Publication Date
WO2010135902A1 true WO2010135902A1 (zh) 2010-12-02

Family

ID=41219969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2009/076323 WO2010135902A1 (zh) 2009-05-27 2009-12-31 高低压导阀

Country Status (2)

Country Link
CN (1) CN101561048B (zh)
WO (1) WO2010135902A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384261A (zh) * 2011-07-12 2012-03-21 宁波合昊液压泵业有限公司 用于无级变速器的插装式中位阀
CN104847937A (zh) * 2015-05-18 2015-08-19 苏州赛智达智能科技有限公司 Lng储罐上的低温回气阀
CN106989197A (zh) * 2017-05-11 2017-07-28 西安航天动力研究所 一种导阀阀体结构及先导式电磁气动阀
CN108999778A (zh) * 2018-10-26 2018-12-14 河南伯淼水处理有限公司 一种新型高压泵用进排液阀
CN110185804A (zh) * 2019-05-14 2019-08-30 佛山一精模具配件有限公司 一种抗压气顶阀

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101561048B (zh) * 2009-05-27 2013-05-01 四川华宇石油钻采装备有限公司 低压导阀
CN109253301A (zh) * 2018-09-05 2019-01-22 爱发科东方真空(成都)有限公司 一种高压阀门及集成阀门组

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121619A (en) * 1972-04-04 1978-10-24 Pauliukonis Richard S Tapered valves with conical seats
DE3240718A1 (de) * 1982-11-04 1984-05-10 Linde Ag, 6200 Wiesbaden Ventil fuer eine explosionsfaehige fluide fuehrende leitung
CN2089067U (zh) * 1990-05-09 1991-11-20 四川石油管理局钻采工艺研究所 钻杆单流阀
CN2143703Y (zh) * 1992-10-23 1993-10-13 刘恩欣 滴水自动止流器
US5645263A (en) * 1993-10-04 1997-07-08 Caterpillar Inc. Pilot valve for a flow amplyifying poppet valve
CN2923993Y (zh) * 2006-07-25 2007-07-18 辽河石油勘探局 注汽井井下蒸汽止回装置
CN101235903A (zh) * 2008-03-11 2008-08-06 浙江大学 压电晶体驱动高速开关阀
CN201187585Y (zh) * 2008-03-11 2009-01-28 浙江大学 一种压电晶体驱动高速开关阀
CN101561048A (zh) * 2009-05-27 2009-10-21 泸州川油钻采工具有限公司 高低压导阀
CN101608539A (zh) * 2009-07-17 2009-12-23 泸州川油钻采工具有限公司 高低压导阀

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121619A (en) * 1972-04-04 1978-10-24 Pauliukonis Richard S Tapered valves with conical seats
DE3240718A1 (de) * 1982-11-04 1984-05-10 Linde Ag, 6200 Wiesbaden Ventil fuer eine explosionsfaehige fluide fuehrende leitung
CN2089067U (zh) * 1990-05-09 1991-11-20 四川石油管理局钻采工艺研究所 钻杆单流阀
CN2143703Y (zh) * 1992-10-23 1993-10-13 刘恩欣 滴水自动止流器
US5645263A (en) * 1993-10-04 1997-07-08 Caterpillar Inc. Pilot valve for a flow amplyifying poppet valve
CN2923993Y (zh) * 2006-07-25 2007-07-18 辽河石油勘探局 注汽井井下蒸汽止回装置
CN101235903A (zh) * 2008-03-11 2008-08-06 浙江大学 压电晶体驱动高速开关阀
CN201187585Y (zh) * 2008-03-11 2009-01-28 浙江大学 一种压电晶体驱动高速开关阀
CN101561048A (zh) * 2009-05-27 2009-10-21 泸州川油钻采工具有限公司 高低压导阀
CN101608539A (zh) * 2009-07-17 2009-12-23 泸州川油钻采工具有限公司 高低压导阀

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384261A (zh) * 2011-07-12 2012-03-21 宁波合昊液压泵业有限公司 用于无级变速器的插装式中位阀
CN102384261B (zh) * 2011-07-12 2014-08-20 宁波合昊液压泵业有限公司 用于无级变速器的插装式中位阀
CN104847937A (zh) * 2015-05-18 2015-08-19 苏州赛智达智能科技有限公司 Lng储罐上的低温回气阀
CN106989197A (zh) * 2017-05-11 2017-07-28 西安航天动力研究所 一种导阀阀体结构及先导式电磁气动阀
CN106989197B (zh) * 2017-05-11 2023-03-21 西安航天动力研究所 一种导阀阀体结构及先导式电磁气动阀
CN108999778A (zh) * 2018-10-26 2018-12-14 河南伯淼水处理有限公司 一种新型高压泵用进排液阀
CN108999778B (zh) * 2018-10-26 2024-04-05 河南伯淼水处理有限公司 一种新型高压泵用进排液阀
CN110185804A (zh) * 2019-05-14 2019-08-30 佛山一精模具配件有限公司 一种抗压气顶阀

Also Published As

Publication number Publication date
CN101561048B (zh) 2013-05-01
CN101561048A (zh) 2009-10-21

Similar Documents

Publication Publication Date Title
WO2010135902A1 (zh) 高低压导阀
CN204226806U (zh) 流动控制系统和具有关闭辅助的控制阀
CN100443791C (zh) 监控阀门系统和感测流体阀门状态的方法
US8794589B2 (en) Actuator having an override apparatus
US10260646B2 (en) Valve
CN111828685A (zh) 一种隔离式两位三通阀
CN117432864B (zh) 一种用于阀门的节流装置
CN110307389B (zh) 一种基于状态反馈的汽轮机液动阀门故障诊断方法
JP4014353B2 (ja) 逆止弁
CN107035876B (zh) 一种低水损减压型倒流防止器
CN112161090A (zh) 一种轴流式止回阀
JP7383032B2 (ja) 電磁弁
CN110206508B (zh) 井口截止阀
JP5390117B2 (ja) 蒸気弁装置およびこれを用いた蒸気タービンの制御方法
US20170370497A1 (en) Valve assembly having a manual override unit
US8424567B2 (en) Bi-directional valve with cavity pressure relief
CN219102171U (zh) 气动执行器
RU2520792C1 (ru) Вентиль
CN219796298U (zh) 一种气动控制阀
CN101608539A (zh) 高低压导阀
RU2773850C1 (ru) Клапан с перепадом давления на седле
CN201359134Y (zh) 手动气阀
CN110220014B (zh) 一种低操作力矩高压截止阀
CN211009965U (zh) 一种气液联动紧急切断固定球阀的球体结构
CN211901590U (zh) 一种控制阀用的套筒阀座压合结构

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09845118

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09845118

Country of ref document: EP

Kind code of ref document: A1