CN201187629Y - High pressure instrument ball valve rod seal apparatus with self-tightening type seal structure - Google Patents
High pressure instrument ball valve rod seal apparatus with self-tightening type seal structure Download PDFInfo
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- CN201187629Y CN201187629Y CNU2008200325431U CN200820032543U CN201187629Y CN 201187629 Y CN201187629 Y CN 201187629Y CN U2008200325431 U CNU2008200325431 U CN U2008200325431U CN 200820032543 U CN200820032543 U CN 200820032543U CN 201187629 Y CN201187629 Y CN 201187629Y
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- valve
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- instrument ball
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- 238000007789 sealing Methods 0.000 claims abstract description 44
- 210000004907 gland Anatomy 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 9
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000012369 In process control Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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- Details Of Valves (AREA)
Abstract
本实用新型公开了一种具有自紧式密封结构的高压仪表球阀阀杆密封装置，其特征在于：在高压仪表球阀的阀杆与阀体间设有一种由O型密封圈和楔形密封环组成的双重密封结构，楔形密封环与O形圈安装在阀杆底部的环形凹槽内，楔形密封环与阀杆凸台斜面紧密接触，O形圈与凹槽底部以及阀体内孔紧密接触。本实用新型改善了目前小口径仪表球阀常用的聚四氟乙烯柱状与片状密封结构在一定的压力下因产生冷流现象而导致阀杆与阀体间密封效果不佳的问题。
The utility model discloses a high-pressure instrument ball valve stem sealing device with a self-tightening sealing structure, which is characterized in that an O-shaped sealing ring and a wedge-shaped sealing ring are arranged between the valve stem and the valve body of the high-pressure instrument ball valve. The wedge-shaped sealing ring and O-ring are installed in the annular groove at the bottom of the valve stem, the wedge-shaped sealing ring is in close contact with the slope of the stem boss, and the O-ring is in close contact with the bottom of the groove and the inner hole of the valve body. The utility model improves the problem that the sealing effect between the valve rod and the valve body is not good due to the cold flow phenomenon of the polytetrafluoroethylene columnar and sheet sealing structures commonly used in the current small-diameter instrument ball valves under certain pressure.
Description
技术领域 technical field
本实用新型涉及管线流体控制技术领域，特指小口径球阀的阀杆与阀体间采用的密封结构。The utility model relates to the technical field of pipeline fluid control, in particular to a sealing structure adopted between a valve rod and a valve body of a small-diameter ball valve.
背景技术 Background technique
在具有大量管线的过程控制工程中通常需采用了各式各样的仪表管阀件，球阀是常用的阀门之一。与截止阀相比，球阀具有开关迅速、加工成本低、操作方便等优点，因此，球阀的用量日趋增大。目前国产高压仪表球阀产品的质量与国外发达国家的同类产品差距甚大，密封性能与耐用度远不过关。究其原因，主要在于设计、制造水平及材料的选用与处理工艺上。In process control engineering with a large number of pipelines, various instrument pipe valves are usually used, and ball valves are one of the commonly used valves. Compared with globe valves, ball valves have the advantages of rapid switching, low processing cost, and convenient operation. Therefore, the amount of ball valves is increasing day by day. At present, the quality of domestic high-pressure instrument ball valve products is far from that of similar products in developed countries abroad, and the sealing performance and durability are far behind. The reason lies mainly in the design, manufacturing level, material selection and processing technology.
小口径球阀的泄漏主要可分为内部泄漏和外部泄漏，内部泄漏主要是指球体和阀座间的泄漏；而易引起外部泄漏的关键部位之一，是阀杆和阀体间的密封。因此，该处密封结构的选择与加工质量控制应给予足够重视。The leakage of small-diameter ball valves can be mainly divided into internal leakage and external leakage. Internal leakage mainly refers to the leakage between the ball and the valve seat; and one of the key parts that easily cause external leakage is the seal between the valve stem and the valve body. Therefore, enough attention should be paid to the selection of the sealing structure and the quality control of processing.
目前小口径仪表球阀通常采用的单一的聚四氟乙烯柱状及片状密封结构，由于聚四氟乙烯填料长期在预压力的作用下较易产生蠕变流动(即冷流)，从而导致阀门压盖所施加的预紧力逐渐松弛，进而使阀杆与阀座密封面处丧失有效的贴合力，甚至出现间隙，导致密封失效，出现外泄的现象。At present, small diameter instrument ball valves usually adopt a single PTFE columnar and sheet-shaped sealing structure. Because PTFE packing is prone to creep flow (ie cold flow) under the action of pre-pressure for a long time, resulting in valve pressure The pre-tightening force exerted by the cover gradually loosens, and then the effective bonding force between the valve stem and the valve seat sealing surface is lost, and even a gap appears, resulting in seal failure and leakage.
发明内容 Contents of the invention
本实用新型的目的是提供一种具有自紧式密封结构的高压仪表球阀阀杆密封装置，可有效防止因聚四氟乙烯填料在预压力的作用下产生蠕变流动而导致密封失效的问题。The purpose of this utility model is to provide a high-pressure instrument ball valve stem sealing device with a self-tightening sealing structure, which can effectively prevent the problem of sealing failure caused by creep flow of polytetrafluoroethylene filler under the action of pre-pressure.
一种具有自紧式密封结构的高压仪表球阀阀杆密封装置，由阀体、压盖、阀体组成，其特征在于：在高压仪表球阀的阀杆与阀体间设有一种由O型密封圈和楔形密封环组成的双重密封结构，楔形密封环与O形圈安装在阀杆底部的环形凹槽内，楔形密封环与阀杆凸台斜面紧密接触，O形圈与凹槽底部以及阀体内孔紧密接触。A valve stem sealing device of a high-pressure instrument ball valve with a self-tightening sealing structure, which is composed of a valve body, a gland, and a valve body. The double sealing structure is composed of a wedge ring and a wedge-shaped sealing ring. The wedge-shaped sealing ring and the O-ring are installed in the annular groove at the bottom of the valve stem. Pores in the body are in close contact.
本实用新型改善了目前小口径仪表球阀常用的聚四氟乙烯柱状与片状密封结构在一定的压力下因产生冷流现象而导致阀杆与阀体间密封效果不佳的问题。The utility model improves the problem that the sealing effect between the valve rod and the valve body is not good due to the cold flow phenomenon of the polytetrafluoroethylene columnar and sheet sealing structures commonly used in the current small-diameter instrument ball valves under certain pressure.
本实用新型具有以下优点：The utility model has the following advantages:
1)与目前小口径仪表阀门通常采用的单一的聚四氟乙烯柱状及片状结构相比，可有效防止因聚四氟乙烯填料在预压力的作用下产生蠕变流动而导致密封失效的问题。1) Compared with the single polytetrafluoroethylene columnar and sheet structure commonly used in small-diameter instrument valves, it can effectively prevent the problem of seal failure caused by creep flow of polytetrafluoroethylene packing under the action of pre-pressure .
2)本密封结构的既保持了聚四氟乙烯填料摩擦阻力小的优点，又增加了橡胶O型环的弹性预紧力，确保在高压工作条件下阀杆与阀体处的良好密封状态。2) This sealing structure not only maintains the advantage of small frictional resistance of PTFE packing, but also increases the elastic pre-tightening force of the rubber O-ring to ensure a good sealing state between the valve stem and the valve body under high-pressure working conditions.
3)原柱状及片状密封结构中阀体上孔处装填料部位的台阶已无必要设置，这样可以简化阀体的加工工艺，降低阀门的制造成本。3) In the original columnar and sheet-shaped sealing structure, there is no need to set the step of the filling part at the upper hole of the valve body, which can simplify the processing technology of the valve body and reduce the manufacturing cost of the valve.
附图说明Description of drawings
图1是自紧式球阀阀杆的密封结构图Figure 1 is a sealing structure diagram of the self-tightening ball valve stem
1、阀杆2、压盖3、阀体4、楔形密封环5、O形密封圈6、球体7、环形凹槽8、阀体内孔1. Valve stem 2, gland 3, valve body 4, wedge-
具体实施方式 Detailed ways
本实用新型包括O型密封圈5和楔形密封环4组成的双重封结构，聚四氟乙烯楔形密封环4的加工角度应根据其受力状态，确定其最佳工作角度。O形密封圈5采用氟橡胶材料，以提高该密封件在各种腐蚀性介质作用的耐腐蚀能力。楔形密封环4应与O形密封圈5尽可能大的接触面积，O形密封圈5的尺寸应充分考虑与其配合的装配空间，使其安装后存在足够的预紧度。The utility model includes a double-sealing structure composed of an O-
该密封结构的基本工作原理如下：The basic working principle of the sealing structure is as follows:
1、当球阀处于关闭状态，阀杆1密封处处于低压状态，阀杆1与阀体3的密封主要依靠确O形密封圈5来实现。1. When the ball valve is in the closed state, the seal of the
2、当球阀处于开启状态，阀杆1密封处处于高压状态，首先高压流体在流经O形密封圈5时，产生较大幅度的压力降，其后，在流体介质的作用下，O形密封圈5产生弹性微量上移，进而使其上部的楔形密封环4向外扩张，与阀体3和阀杆1产生压紧配合，产生良好的密封作用。2. When the ball valve is in the open state and the sealing part of the
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200325431U CN201187629Y (en) | 2008-02-19 | 2008-02-19 | High pressure instrument ball valve rod seal apparatus with self-tightening type seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200325431U CN201187629Y (en) | 2008-02-19 | 2008-02-19 | High pressure instrument ball valve rod seal apparatus with self-tightening type seal structure |
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| Publication Number | Publication Date |
|---|---|
| CN201187629Y true CN201187629Y (en) | 2009-01-28 |
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|---|---|---|---|
| CNU2008200325431U Expired - Fee Related CN201187629Y (en) | 2008-02-19 | 2008-02-19 | High pressure instrument ball valve rod seal apparatus with self-tightening type seal structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252131A (en) * | 2011-06-09 | 2011-11-23 | 林德宽 | Internal pressure self-sealing isolation transmission device |
| CN103410999A (en) * | 2013-05-22 | 2013-11-27 | 麦特汽车服务股份有限公司 | Method for achieving purpose for regulating rates of flow precisely through flow control valve |
| CN104841167A (en) * | 2015-05-16 | 2015-08-19 | 何小平 | Water-leakage-resisting high performance water separator |
-
2008
- 2008-02-19 CN CNU2008200325431U patent/CN201187629Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252131A (en) * | 2011-06-09 | 2011-11-23 | 林德宽 | Internal pressure self-sealing isolation transmission device |
| CN102252131B (en) * | 2011-06-09 | 2012-11-07 | 林德宽 | Internal pressure self-sealing isolation transmission device |
| CN103410999A (en) * | 2013-05-22 | 2013-11-27 | 麦特汽车服务股份有限公司 | Method for achieving purpose for regulating rates of flow precisely through flow control valve |
| CN104841167A (en) * | 2015-05-16 | 2015-08-19 | 何小平 | Water-leakage-resisting high performance water separator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20130219 |