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1. 发明授权

US4535967A Expanding gate valve with fluid-powered actuator 失效
标题翻译：使用流体动力执行器扩大闸阀
公开(公告)号：US4535967A
公开(公告)日：1985-08-20
申请号：US568460
申请日：1984-01-05
申请人： Brett A. Babbitt , Tri C. Le , Bruce P. Noble
发明人： Brett A. Babbitt , Tri C. Le , Bruce P. Noble
IPC分类号： F16K31/122 , F16K47/00 , F16K31/12
CPC分类号： F16K31/1221 , F16K3/186 , F16K47/00
摘要： An expanding gate valve (10) provided with a piston type pneumatic powered actuator (40) for opening and closing the valve wherein the actuator piston (54) is adapted to be driven by fluid pressure in one direction to operate the valve but is returned by spring means (63, 64) when the pressure is removed. The actuator includes a hydraulic choke means (71) comprising a hydraulic piston (80) and cylinder (72) wherein the hydraulic piston is fixed to the actuator stem (23) and is provided with an orifice (89) which imposes a constant velocity control on the actuator stroke by producing a throttling effect on the hydraulic fluid moving from one side of the hydraulic piston to the other. The hydraulic cylinder (72) is filled with a fluid which maintains substantially uniform viscosity in the range of minus 40.degree. Centigrade to 204.degree. Centigrade whereby the valve is adapted for consistent operation during rapid cycling conditions. The actuator housing (41, 42) is a sealed unit with the exception of a single opening (69) which exposes one side of the actuator piston (54) to atmospheric pressure but which may serve as an inlet for pressurized fluid to convert the actuator to a double acting piston actuator when the spring force for returning the actuator piston is inadequate.
摘要翻译：具有用于打开和关闭阀的活塞式气动动力驱动器（40）的膨胀闸阀（10），其中致动器活塞（54）适于由一个方向上的流体压力驱动以操作阀，但由当压力被去除时，弹簧装置（63,64）。致动器包括液压扼流装置（71），其包括液压活塞（80）和气缸（72），其中液压活塞固定在致动器杆（23）上并且设置有孔（89），其施加恒定速度控制在致动器行程上产生对从液压活塞的一侧移动到另一侧的液压流体的节流效果。液压缸（72）充满流体，该流体在零下40摄氏度到204摄氏度的范围内保持基本上均匀的粘度，由此阀适合在快速循环条件下的一致操作。致动器壳体（41,42）是密封单元，除了将致动器活塞（54）的一侧暴露于大气压力的单个开口（69）之外，其可以用作加压流体的入口以将致动器到用于使致动器活塞返回的弹簧力不足时的双作用活塞致动器。

2. 发明授权

US4650226A Holddown screw 失效
标题翻译：锁定螺丝
公开(公告)号：US4650226A
公开(公告)日：1987-03-17
申请号：US845912
申请日：1986-03-31
申请人： Brett A. Babbitt , Tri C. Le
发明人： Brett A. Babbitt , Tri C. Le
IPC分类号： E21B33/04 , F16L25/06 , F16L19/00
CPC分类号： F16L25/065 , E21B33/04
摘要： A holddown screw 10 which features a shank 23 and contact nose 22 of separate construction. The contact nose 22 is provided with a flat bevelled contact surface 32 of predetermined angle to the axis of the screw selected to correspond to the angle of the camming surface 17a with which it is designed to cooperate. The contact nose is carried on the shank 23 and is adapted for relative rotation thereon as the screw is rotated. The back end of the contact nose is provided with an annular surface 22a disposed radially to the longitudinal axis of the screw and adapted to engage an annular shoulder 35 of the shank 23 in flat co-planar relationship therewith. As the screw is rotated and driven inwardly to contact the wellhead component 14 to be actuated, the flat contact surface 32 of the nose of the screw will engage in sliding contact with the cooperating camming surface 17a. Since the contact nose does not rotate against the cooperating camming surface 17 a of the wellhead component and engages over a large contact area, contact stresses are reduced and susceptibility to galling is minimized. The shank 23 includes an externally threaded section 23a adjacent its outer end which receives a packing nut 25. The packing nut 25 is externally threaded whereby it may be threaded into the bore 11 provided in a wellhead structure 12 and used to energize a packing assembly sleeved about the shank 23 by compressing the assembly against a shoulder provided in the bore 11.
摘要翻译：按压螺钉10，其具有柄23和分离结构的接触鼻22。接触鼻22设置有与螺杆的轴线成预定角度的平坦的倾斜接触表面32，其被选择为对应于被设计为配合的凸轮表面17a的角度。接触鼻子被承载在柄23上，并且当螺钉旋转时适合于其上的相对旋转。接触鼻的后端设置有径向地设置在螺钉的纵向轴线上的环形表面22a，并且适于以平坦的共面关系与柄23的环形肩部35接合。当螺杆旋转并向内驱动以接触要被致动的井口部件14时，螺钉的鼻部的平坦接触表面32将与配合的凸轮表面17a滑动接触。由于接触鼻不旋转靠在井口部件的配合的凸轮表面17a上并且接合在大的接触区域上，所以接触应力减小，并且对磨损的敏感性最小化。柄23包括邻近其外端的外螺纹部分23a，该外螺纹部分接收填料螺母25.填料螺母25是外螺纹的，从而可将螺纹部分螺纹拧入设置在井口结构12中的孔11中，并用于对套筒组件通过将组件压靠在设置在孔11中的肩部上而围绕柄23。

3. 发明授权

US4516752A Mechanically preloaded packing assembly 失效
标题翻译：机械预装包装组件
公开(公告)号：US4516752A
公开(公告)日：1985-05-14
申请号：US570110
申请日：1984-01-12
申请人： Brett A. Babbitt , Tri C. Le
发明人： Brett A. Babbitt , Tri C. Le
IPC分类号： F16J15/18 , F16K41/04 , F16K31/44 , F16J15/00
CPC分类号： F16J15/186 , F16K41/04
摘要： A pressure energized mechanically preloaded packing assembly (48, 68) of a high pressure gate valve (10). The packing assemblies are positioned in an annular space about the valve stems (36, 64) for sealing between the valve stems and bonnet (38) or valve body (12). The packing assemblies include an energizer ring (78) which is positioned within the annular space having an outwardly facing precision cut frusto-conical end surface (82) relative to the flow passage (16, 18) of the valve. A plurality of Belleville springs or spring washers (98) with a generally frusto-conical shape are positioned adjacent and in concave relation to the outer end (82) of the energizer ring. The cone angle of the spring washers are smaller than the cone angle of the energizer ring. The packing assembly further includes at least one packing ring set positioned outside the spring washers (106, 108) which includes a stack of plastic packing elements (110) which are sandwiched between a pair of retainer rings (112, 114). A packing gland nut (118) is disposed in contiguous relation to the packing ring set and is externally threaded for accommodating its connection with the valve body whereby the gland nut is axially adjustable to apply axial pressure on the packing ring set and spring washers. The spring washers (98) are compressed until their cone angle matches the cone angle of the energizer ring (78) such that the spring washers exert a predetermined preload onto the packing ring set to provide a low pressure seal between the stem and valve body.
摘要翻译：一种高压闸阀（10）的受压力机械预加载的包装组件（48,68）。包装组件位于围绕阀杆（36,64）的环形空间中，用于在阀杆和阀盖（38）或阀体（12）之间进行密封。包装组件包括一个位于环形空间内的增力环（78），该环形空间具有相对于阀的流动通道（16,18）具有向外的精确切割的截头圆锥形端面（82）。具有大致截头圆锥形状的多个贝氏弹簧或弹簧垫圈（98）被定位成邻近并且与增力环的外端（82）成凹形关系。弹簧垫圈的锥角小于增力环的锥角。所述包装组件还包括定位在所述弹簧垫圈（106,108）外部的至少一个密封环组件，所述填料环包括夹在一对保持环（112,114）之间的一堆塑料填料元件（110）。填料压盖螺母（118）与填料环组相邻地设置，并且是外螺纹的，用于容纳其与阀体的连接，由此压盖螺母可轴向调节以在衬垫环组件和弹簧垫圈上施加轴向压力。弹簧垫圈（98）被压缩直到它们的锥角与加力环（78）的锥角匹配，使得弹簧垫圈对预定的预载荷施加到填料环组上，以在杆和阀体之间提供低压密封。

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