WO2016070470A1 - 压力平衡式油密封旋塞阀和调节定心机构 - Google Patents

压力平衡式油密封旋塞阀和调节定心机构 Download PDF

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Publication number
WO2016070470A1
WO2016070470A1 PCT/CN2014/092006 CN2014092006W WO2016070470A1 WO 2016070470 A1 WO2016070470 A1 WO 2016070470A1 CN 2014092006 W CN2014092006 W CN 2014092006W WO 2016070470 A1 WO2016070470 A1 WO 2016070470A1
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Prior art keywords
top block
pressure
hole
cock
concave
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PCT/CN2014/092006
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English (en)
French (fr)
Inventor
顾立东
张晓松
杨胜龙
杜华东
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四川精控阀门制造有限公司
中国石油天然气股份有限公司西部管道分公司
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Publication of WO2016070470A1 publication Critical patent/WO2016070470A1/zh

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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
    • 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
    • F16K5/02—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 conical surfaces; Packings therefor
    • 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
    • F16K5/02—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 conical surfaces; Packings therefor
    • F16K5/0207—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 conical surfaces; Packings therefor with special plug arrangement, e.g. special shape or built in 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
    • 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
    • F16K5/10—Means for additional adjustment of the rate of flow
    • 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
    • F16K5/16—Special arrangements for separating the sealing faces or for pressing them together for plugs with conical surfaces

Definitions

  • the present invention relates to a plug valve, and more particularly to a pressure balanced oil seal plug valve. Furthermore, the invention relates to a valve body component, in particular an adjustment centering mechanism.
  • the sealing function of the pressure balanced oil seal plug valve is mainly realized by the oil film with uniform thickness between the valve body and the taper surface of the plug, and the thickness of the oil film is determined by the adjusting centering mechanism of the cock.
  • Valves are used on pipes and are frequently turned on and off. Generally speaking, after several times of switching, a new sealing grease should be injected into the valve cavity, and the thickness and uniformity of the oil film should be adjusted by using the cock to adjust the centering mechanism. Therefore, in terms of the use of the valve, the adjustment of the centering mechanism of the cock is also relatively frequent.
  • one of the main points of the pressure balanced oil seal plug valve is to introduce the medium pressure in the pipeline to the lower part and the upper part of the plug of the plug valve, so that the cock is in a pressure balance state and help the seal to be realized.
  • the adjustment centering mechanism that uses a large number of plug valves is the structure shown in Figs.
  • the specific structure is: a steel ball is matched with the taper hole below the medium pressure introduction hole of the cock; the lower part is a top block with a spherical groove; the lower part is a pressure metal foil; the lower part is a top block ; under it is the adjustment bolt.
  • the cock of this structure adjusts the centering mechanism, which often causes the following problems during assembly and use of the valve:
  • the size of the top block will not be very large. During the adjustment process, the contact stress between the lower end surface of the top block and the pressure-bearing metal foil will be large, which will easily cause the bearing metal. Permanent plastic deformation of the sheet;
  • the technical problem to be solved by the present invention is to provide a pressure balanced oil seal plug valve that maintains a more reliable pressure balance.
  • the present invention solves the technical problem of the pressure balanced oil seal plug valve, comprising a cock, a valve body and a adjusting centering mechanism, the bottom of the cock is provided with a pressure introducing hole, and the adjusting centering mechanism is installed on the valve body
  • the bottom plate is coaxially engaged with the pressure introducing hole
  • the adjusting centering mechanism comprises an adjusting bolt, a pressure receiving metal foil, a circular adjusting gasket, an upper top block and a lower top block, wherein the bottom of the cock is provided a cocked flat bottom hole having a cylindrical shape and a diameter larger than the pressure introduction hole;
  • the bottom plate of the valve body is provided with a threaded hole, and the threaded hole, the cock flat bottom hole and the pressure introduction hole are coaxially arranged; the direction from the cock flat bottom hole to the threaded hole
  • the adjusting washer, the upper top block, the pressure receiving metal foil, the lower top block and the adjusting bolt are sequentially disposed, wherein the adjusting
  • the upper top block is composed of a convex top block and a concave top block, and the convex top block and the concave top block cooperate with each other through a spherical surface or a conical surface.
  • the lower surface of the concave top block is a conical concave surface, and the upper surface of the concave top block is in contact with the adjusting pad;
  • the upper surface of the convex top block is a spherical convex surface, and the lower surface of the convex top block and the bearing
  • the pressing metal foil is in a mating engagement; the concave top block and the convex top block cooperate with each other through the conical concave surface and the spherical convex surface.
  • a protective cover is further included, the protective cover is provided with an internal thread, and the protective cover is mounted by an internal thread at an end of the adjusting bolt extending out of the bottom plate.
  • a sealing ring is further included, and the sealing ring is disposed on a bottom end surface of the protective cover.
  • Another technical problem to be solved by the present invention is to provide a plug valve adjusting centering mechanism that maintains a more reliable pressure balance.
  • the adjusting centering mechanism provided by the invention comprises a circular adjusting gasket, an upper top block, a pressure receiving metal foil, a lower top block and an adjusting bolt which are sequentially contacted and matched. Adjusting the size of the gasket can be set according to the situation without special concentric positioning, so that the upper top block and the lower top block can be set with a larger cross-sectional area, so that the pressure of the pressure-bearing metal foil is reduced. Small, under the premise of meeting the sealing performance requirements, the pressure-bearing metal foil is flat, and will not cause upward convex deformation due to the upward adjustment of the lower top block and the adjusting bolt.
  • the upper top block is composed of a convex top block and a concave top block, and the convex top block and the concave top block cooperate with each other through a spherical surface or a conical surface.
  • the lower surface of the concave top block is a conical concave surface, and the upper surface of the concave top block is in contact with the adjusting pad;
  • the upper surface of the convex top block is a spherical convex surface, and the lower surface of the convex top block and the bearing
  • the pressing metal foil is in a mating engagement; the concave top block and the convex top block cooperate with each other through the conical concave surface and the spherical convex surface.
  • a protective cover is further included, the protective cover is provided with an internal thread, and the protective cover is mounted by an internal thread at one end of the adjusting bolt back to the top block.
  • a sealing ring is further included, and the sealing ring is disposed on a bottom end surface of the protective cover.
  • the beneficial effects of the invention are that the matching area of the circular adjusting washer and the flat bottom hole of the cock is large, and it is not easy to completely seal in actual use, so that the pressure in the cock can smoothly enter between the cock and the valve body, which
  • the cock can maintain the pressure balance for a long time; at the same time, the large contact area of the circular adjusting washer and the flat bottom hole of the cock can also filter, so that impurities in the medium are not easily entered between the cock and the valve body.
  • the round adjustment pad does not need to be positioned as accurately as a ball during assembly, making it easier to assemble.
  • the upper top block may be composed of a convex top block and a concave top block, and the conical surface at the lower end of the convex top block and the spherical surface at the upper end of the concave top block cooperate to realize automatic centering to eliminate other factors to match the cock and the valve body cone surface. Impact.
  • Figure 1 is a schematic view of the present invention
  • Figure 2 is an enlarged view of A of Figure 1;
  • Figure 3 is a schematic view of the prior art
  • Figure 4 is an enlarged view of I of Figure 3;
  • the present invention includes a cock 1, a valve body 2, and a regulating centering mechanism 3, the bottom of which is provided with a pressure introduction hole 4, and the adjustment centering mechanism 3 is mounted on the valve body 2
  • the bottom plate is coaxially engaged with the pressure introducing hole 4, and the adjusting centering mechanism 3 includes an adjusting bolt 11, a pressure-bearing metal sheet 9, and a circular tone.
  • the bottom of the cock 1 is provided with a cock flat bottom hole 5 having a cylindrical shape and a diameter larger than the pressure introduction hole 4;
  • the bottom plate of the valve body 2 is provided with a threaded hole And the threaded hole, the cock flat bottom hole 5 and the pressure introducing hole 4 are coaxially arranged; in the direction from the cock flat bottom hole 5 to the threaded hole, the adjusting shims 6, the upper top block, the pressure-bearing metal foil 9, the lower top block 10, and
  • the adjusting bolts 11 are sequentially disposed, wherein the adjusting washer 6 and the upper top block are disposed in the cock flat bottom hole 5, the pressure receiving metal foil 9 is disposed between the cock 1 and the bottom plate of the valve body 2, and the lower top block 10 is disposed in the threaded hole Inside, the adjusting bolt 11 is installed in the threaded hole and extends outside the bottom plate of the valve body 2.
  • the plug 1 of the plug valve is different from the conventional one, and the bottom of the plug is provided with a flat bottom hole 5 instead of a tapered hole.
  • the size of the flat bottom hole 5 can be designed as needed, so that the bottom of the flat bottom hole 5 and the pressure-bearing metal
  • the contact stress between the sheets 9 is much smaller than the necessary specific pressure required to achieve the sealing, and no sealing effect is produced. That is to say, the structure here can effectively realize that the fine particulate matter impurities in the flow channel medium are prevented from entering the lower portion of the cock 1 and the valve cavity, and at the same time, the medium pressure in the flow channel can be introduced into the lower portion of the cock 1 and the valve cavity.
  • the pressure balance state of the cock 1 is effectively realized, and the effective sealing of the sealing surface of the cock 1 and the valve body 2 is ensured.
  • the cock flat bottom hole 5 is concentric with the pressure introducing hole 4, and the adjusting shims 6 are circular, and the thickness thereof can be determined according to actual conditions.
  • the lower top block 10 is pushed by the adjusting bolt 11, and then the pressure receiving metal foil 9 and the upper top block are driven, and finally the adjusting washer 6 is engaged with the cock flat bottom hole 5, and the adjusting cushion can be controlled by adjusting the adjusting bolt 11.
  • the degree of cooperation between the piece 6 and the flat bottom hole 5 of the cock is to achieve the skill balance pressure, and can filter the impurities, and can also adjust the sealing degree of the cock 1, thereby effectively improving the inner and outer sealing performance of the valve.
  • the upper top block is composed of a convex top block 8 and a concave top block 7, and the convex top block 8 and the concave top block 7 are fitted to each other by a spherical surface or a conical surface.
  • the convex top block 8 and the concave top block 7 can be matched by a spherical surface, or by a conical surface, or a spherical surface can be matched with a conical surface.
  • Such a cooperation can achieve the effect of self-centering to eliminate the influence of other factors on the taper fit of the cock 1 and the valve body 2.
  • the lower surface of the concave top block 7 is a conical concave surface, and the upper surface of the concave top block 7 is in contact with the adjusting pad 6; the upper surface of the convex top block 8 is a spherical convex surface.
  • the lower surface of the convex top block 8 is in contact with the pressure-bearing metal foil 9; the concave top block 7 and the convex top block 8 cooperate with each other through a conical concave surface and a spherical convex surface.
  • the matching of the spherical surface can be automatically centered, and a certain angular error can be used, so that the force can be transmitted better when the adjusting bolt 11 is adjusted, so that the direction of the force is always coaxial with the cock 1 to avoid affecting it. .
  • a protective cover 12 is further provided, the protective cover 12 is provided with internal threads, and the protective cover 12 is mounted by internal threads at one end of the adjusting bolt 11 extending out of the bottom plate.
  • the protective cover 12 can be made of a corrosion-resistant material, such as a commonly used plastic or stainless steel.
  • the sealing ring 13 can be pretended on the bottom end surface of the protective cover 12. When the protective cover 12 is sleeved on the adjusting bolt 11, the protective cover 12 will be adjusted. The exposed portion of the bolt 11 is sealed to prevent the adjusting bolt 11 from being corroded.

Abstract

一种压力平衡式油密封旋塞阀,包括旋塞（1）、阀体（2）以及调节定心机构（3），旋塞（1）的底部设置有压力引入孔（4），调节定心机构（3）安装在阀体（2）的底板上并与压力引入孔（4）同轴配合，调节定心机构（3）包括调节螺栓（11）、承压金属薄片（9）、圆形的调整垫片（6）、上顶块和下顶块（10），旋塞（1）的底部设置有圆柱形且直径大于压力引入孔（4）的旋塞平底孔（5）；阀体（2）的底板上设置有螺纹孔，并且螺纹孔、旋塞平底孔（5）和压力引入孔（4）同轴设置；从旋塞平底孔（5）到螺纹孔的方向上，调整垫片（6）、上顶块、承压金属薄片（9）、下顶块（10）和调节螺栓（11）依次设置。该旋塞阀是一种保持压力平衡更可靠的压力平衡式油密封旋塞阀。

Description

压力平衡式油密封旋塞阀和调节定心机构 技术领域
本发明涉及一种旋塞阀，尤其是一种压力平衡式油密封旋塞阀。此外，本发明还涉及一种阀体部件，具体是一种调节定心机构。
背景技术
压力平衡式油密封旋塞阀的密封作用，主要是依靠阀体和旋塞锥面之间厚度均匀的油膜来实现的，而油膜厚度的确定就是靠旋塞的调节定心机构来完成的。阀门在管道上使用，会频繁的开启和关闭。一般来讲，开关几次后，就应该向阀腔内注入新的密封脂，并且重新利用旋塞调节定心机构对油膜的厚度和均匀程度进行调节。因此，就阀门的使用而言，对旋塞的调节定心机构的调节，也是比较频繁的。另外，压力平衡式油密封旋塞阀的要点之一就是要把管道中的介质压力引入到旋塞阀的旋塞下部和上部，使旋塞处于压力平衡状态，并帮助密封的实现。
在油气管道上，大量使用旋塞阀的调节定心机构都是附图3和4所示的结构。其具体结构为：在旋塞的介质压力引入孔下方的锥孔处有一个钢球与之配合；其下为一个有球形凹槽的顶块；其下为承压金属薄片；其下为顶块；其下为调节螺栓。但是，这种结构的旋塞调节定心机构，往往会使阀门在装配和使用过程中存在以下问题：
(1)钢球和旋塞锥孔的配合，有自动定心的作用。但是，由于钢球和旋塞锥孔间的接触面很小，使它们之间极易产生金属硬密封的效果，造成流道中的介质压力不能进入旋塞的下方和阀腔中。使得压力平衡的效果丧失，降低了阀门的密封能力，阀门容易产生内漏；
(2)由于受钢球尺寸的限制，造成顶块的尺寸不会很大，在调节过程中，顶块的下端面和承压金属薄片之间的接触应力会很大，容易引起承压金属薄片的永久塑性变形；
(3)由附图3和4可知，当旋塞和阀体锥面的油膜厚度合适时，能够使承压金属薄片保持平整状态，对承压金属薄片与阀体、承压金属薄片与阀盖之间的密封是最为有利的。但是，附图4的旋塞调节定心机构，在阀门使用过程中，由于频繁的调节，会使承压金属薄片的中心部位向上变形凸起，使承压金属薄片发生松动，从而引起阀体和阀盖间的密封外漏；
(4)由于调节螺栓和锁紧螺母都是裸露在外界环境中的，阀门在长时间的使用过程中，调节螺栓的螺纹常因积垢或生锈而失效。
发明内容
本发明所要解决的技术问题是提供一种保持压力平衡更可靠的压力平衡式油密封旋塞阀。
本发明解决其技术问题所采用的压力平衡式油密封旋塞阀，包括旋塞、阀体以及调节定心机构，所述旋塞的底部设置有压力引入孔，所述调节定心机构安装在阀体的底板上并与所述压力引入孔同轴配合，所述调节定心机构包括调节螺栓、承压金属薄片、圆形的调整垫片、上顶块和下顶块，所述旋塞的底部设置有圆柱形且直径大于压力引入孔的旋塞平底孔；所述阀体的底底板上设置有螺纹孔，并且螺纹孔、旋塞平底孔和压力引入孔同轴设置；从旋塞平底孔到螺纹孔的方向上，调整垫片、上顶块、承压金属薄片、下顶块和调节螺栓依次设置，其中，调整垫片和上顶块设置在旋塞平底孔内，承压金属薄片设置在旋塞和阀体的底板之间，下顶块设置在螺纹孔上部，调节螺栓安装在螺纹孔内并延伸到阀体的底板外。
进一步的是，所述上顶块由凸顶块和凹顶块组成，凸顶块和凹顶块通过球形面或\和圆锥形面相互配合。
进一步的是，所述凹顶块的下表面为圆锥形凹面，凹顶块的上表面与调整垫片接触配合；所述凸顶块的上表面为球形凸面，凸顶块的下表面与承压金属薄片接触配合；所述凹顶块与凸顶块通过圆锥形凹面和球形凸面相互配合。
进一步的是，还包括防护盖，所述防护盖设置有内螺纹，所述防护盖通过内螺纹安装在调节螺栓延伸出底板的一端。
进一步的是，还包括密封圈，所述密封圈设置在防护盖的底部端面上。
此外，本发明另一个要解决的技术问题是提供一种保持压力平衡更可靠的旋塞阀调节定心机构。
本发明提供的调节定心机构，包括依次接触配合的圆形调整垫片、上顶块、承压金属薄片、下顶块和调节螺栓。调整垫片的大小可根据情况设置，而不需要进行特别的同心定位，这样，其下的上顶块和下顶块就可以设置较大的截面积，从而使得承压金属薄片承受的压强减小，在满足密封性能要求的前提下，承压金属薄片是平整的，不会因下顶块和调节螺栓向上调节而产生向上的凸起变形。
进一步的是，所述上顶块由凸顶块和凹顶块组成，凸顶块和凹顶块通过球形面或\和圆锥形面相互配合。
进一步的是，所述凹顶块的下表面为圆锥形凹面，凹顶块的上表面与调整垫片接触配合；所述凸顶块的上表面为球形凸面，凸顶块的下表面与承压金属薄片接触配合；所述凹顶块与凸顶块通过圆锥形凹面和球形凸面相互配合。
进一步的是，还包括防护盖，所述防护盖设置有内螺纹，所述防护盖通过内螺纹安装在调节螺栓背向下顶块的一端。
进一步的是，还包括密封圈，所述密封圈设置在防护盖的底部端面上。
本发明的有益效果是：圆形调整垫片和旋塞平底孔的配合面积较大，在实际使用中不容易完全密封，这就使得旋塞内的压力能够顺利进入到旋塞与阀体之间，这使得旋塞能够长期保持压力平衡；同时，圆形调整垫片和旋塞平底孔较大的接触面积也能起到过滤的作用，使得介质中的杂质不容易进入到旋塞与阀体之间。圆形调整垫片在装配的时候不需要像球体那样准确定位，因此在装配时更加方便。上顶块可以采用凸顶块和凹顶块组成，凸顶块下端的圆锥面和凹顶块上端的球面相配合，实现自动定心的作用，以消除其它因素对旋塞和阀体锥面配合的影响。
附图说明
图1是本发明的示意图；
图2是图1的A处放大图；
图3是现有技术的示意图；
图4是图3的I处放大图；
图中零部件、部位及编号：旋塞1、阀体2、调节定心机构3、压力引入孔4、旋塞平底孔5、调整垫片6、凹顶块7、凸顶块8、承压金属薄片9、下顶块10、调节螺栓11、防护盖12、密封圈13。
具体实施方式
下面结合附图对本发明作进一步说明。
如图1和图2所示，本发明包括旋塞1、阀体2以及调节定心机构3，所述旋塞1的底部设置有压力引入孔4，所述调节定心机构3安装在阀体2的底板上并与所述压力引入孔4同轴配合，所述调节定心机构3包括调节螺栓11、承压金属薄片9、圆形的调 整垫片6、上顶块和下顶块10，所述旋塞1的底部设置有圆柱形且直径大于压力引入孔4的旋塞平底孔5；所述阀体2的底底板上设置有螺纹孔，并且螺纹孔、旋塞平底孔5和压力引入孔4同轴设置；从旋塞平底孔5到螺纹孔的方向上，调整垫片6、上顶块、承压金属薄片9、下顶块10和调节螺栓11依次设置，其中，调整垫片6和上顶块设置在旋塞平底孔5内，承压金属薄片9设置在旋塞1和阀体2的底板之间，下顶块10设置在螺纹孔内，调节螺栓11安装在螺纹孔内并延伸到阀体2的底板外。本旋塞阀的旋塞1与传统的不同，其底部设置的是旋塞平底孔5，而不是锥形孔，旋塞平底孔5的大小可以按需要进行设计，使得旋塞平底孔5的底部和承压金属薄片9之间的接触应力远远小于其实现密封所要求的必需比压，不会产生密封效果。也就是说，此处结构可以有效实现既阻挡流道介质中的细小颗粒物杂质进入旋塞1下部和阀腔中，同时又可以把流道中的介质压力引入旋塞1下部和阀腔内。有效的实现旋塞1的压力平衡状态，保证旋塞1与阀体2密封面的有效密封。旋塞平底孔5与压力引入孔4同心，调整垫片6为圆形，其厚度可根据实际情况而定。在实际使用中，利用调节螺栓11推动下顶块10、进而带动承压金属薄片9、上顶块，最终使得调整垫片6与旋塞平底孔5配合，通过调节调节螺栓11，可以控制调整垫片6与旋塞平底孔5的配合程度，以达到技能平衡压力，又能过滤杂质，还能调节旋塞1的密封程度，最终有效提升了阀门的内、外密封的性能
为了快速的同心定位，如图2所示，所述上顶块由凸顶块8和凹顶块7组成，凸顶块8和凹顶块7通过球形面或\和圆锥形面相互配合。这样，凸顶块8和凹顶块7可以通过球形面配合，也可以通过圆锥面配合，还可以是球形面与圆锥面进行配合。这样的配合可以实现自动定心的作用，以消除其它因素对旋塞1和阀体2锥面配合的影响。
具体的，如图2所示，所述凹顶块7的下表面为圆锥形凹面，凹顶块7的上表面与调整垫片6接触配合；所述凸顶块8的上表面为球形凸面，凸顶块8的下表面与承压金属薄片9接触配合；所述凹顶块7与凸顶块8通过圆锥形凹面和球形凸面相互配合。这种球面的配合可以自动定心，能够使用一定的角度误差，这样在调节螺栓11进行调节时能够更好的传递作用力，使得作用力的方向始终与旋塞1同轴，避免对其造成影响。
为了有效的防护调节螺栓11，如图2所示，还包括防护盖12，所述防护盖12设置有内螺纹，所述防护盖12通过内螺纹安装在调节螺栓11延伸出底板的一端。防护盖12可以采用耐腐蚀材料制成，例如常用的塑料或者不锈钢，在防护盖12的底部端面上可以假装密封圈13，当防护盖12套设到调节螺栓11上后，防护盖12将调节螺栓11露出来的部分密封在内，从而避免调节螺栓11被腐蚀。

Claims (10)

  1. 压力平衡式油密封旋塞阀，包括旋塞(1)、阀体(2)以及调节定心机构(3)，所述旋塞(1)的底部设置有压力引入孔(4)，所述调节定心机构(3)安装在阀体(2)的底板上并与所述压力引入孔(4)同轴配合，其特征在于：所述调节定心机构(3)包括调节螺栓(11)、承压金属薄片(9)、圆形的调整垫片(6)、上顶块和下顶块(10)，所述旋塞(1)的底部设置有圆柱形且直径大于压力引入孔(4)的旋塞平底孔(5)；所述阀体(2)的底底板上设置有螺纹孔，并且螺纹孔、旋塞平底孔(5)和压力引入孔(4)同轴设置；从旋塞平底孔(5)到螺纹孔的方向上，调整垫片(6)、上顶块、承压金属薄片(9)、下顶块(10)和调节螺栓(11)依次设置，其中，调整垫片(6)和上顶块设置在旋塞平底孔(5)内，承压金属薄片(9)设置在旋塞(1)和阀体(2)的底板之间，下顶块(10)设置在螺纹孔上部，调节螺栓(11)安装在螺纹孔内并延伸到阀体(2)的底板外。
  2. 如权利要求1所述的压力平衡式油密封旋塞阀，其特征在于：所述上顶块由凸顶块(8)和凹顶块(7)组成，凸顶块(8)和凹顶块(7)通过球形面或\和圆锥形面相互配合。
  3. 如权利要求2所述的压力平衡式油密封旋塞阀，其特征在于：所述凹顶块(7)的下表面为圆锥形凹面，凹顶块(7)的上表面与调整垫片(6)接触配合；所述凸顶块(8)的上表面为球形凸面，凸顶块(8)的下表面与承压金属薄片(9)接触配合；所述凹顶块(7)与凸顶块(8)通过圆锥形凹面和球形凸面相互配合。
  4. 如权利要求1、2或3所述的压力平衡式油密封旋塞阀，其特征在于：还包括防护盖(12)，所述防护盖(12)设置有内螺纹，所述防护盖(12)通过内螺纹安装在调节螺栓(11)延伸出底板的一端。
  5. 如权利要求4所述的压力平衡式油密封旋塞阀，其特征在于：还包括密封圈(13)，所述密封圈(13)设置在防护盖(12)的底部端面上。
  6. 调节定心机构，其特征在于：包括依次接触配合的圆形调整垫片(6)、上顶块、承压金属薄片(9)、下顶块(10)和调节螺栓(11)。
  7. 如权利要求6所述的调节定心机构，其特征在于：所述上顶块由凸顶块(8)和凹顶块(7)组成，凸顶块(8)和凹顶块(7)通过球形面或\和圆锥形 面相互配合。
  8. 如权利要求7所述的压力平衡式油密封旋塞阀，其特征在于：所述凹顶块(7)的下表面为圆锥形凹面，凹顶块(7)的上表面与调整垫片(6)接触配合；所述凸顶块(8)的上表面为球形凸面，凸顶块(8)的下表面与承压金属薄片(9)接触配合；所述凹顶块(7)与凸顶块(8)通过圆锥形凹面和球形凸面相互配合。
  9. 如权利要求6、7或8所述的压力平衡式油密封旋塞阀，其特征在于：还包括防护盖(12)，所述防护盖(12)设置有内螺纹，所述防护盖(12)通过内螺纹安装在调节螺栓(11)背向下顶块(10)的一端。
  10. 如权利要求9所述的压力平衡式油密封旋塞阀，其特征在于：还包括密封圈(13)，所述密封圈(13)设置在防护盖(12)的底部端面上。
PCT/CN2014/092006 2014-11-07 2014-11-24 压力平衡式油密封旋塞阀和调节定心机构 WO2016070470A1 (zh)

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