CN104089041B - The box-like hermetically-sealed construction of valve sets and method thereof - Google Patents
The box-like hermetically-sealed construction of valve sets and method thereof Download PDFInfo
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- CN104089041B CN104089041B CN201410332072.6A CN201410332072A CN104089041B CN 104089041 B CN104089041 B CN 104089041B CN 201410332072 A CN201410332072 A CN 201410332072A CN 104089041 B CN104089041 B CN 104089041B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010276 construction Methods 0.000 title 1
- 238000012856 packing Methods 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 48
- 210000004907 gland Anatomy 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims 2
- 230000008602 contraction Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
Classifications
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
-
- 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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
本发明公开了一种阀门组合式密封结构及其方法。它包括填料压板、填料压套、四层盘根、防尘圈、联接件、密封圈、弹簧、中间环、阀座、阀门推拉杆；中间环与联接件螺栓连接，联接件与阀门推拉杆间隙配合，阀座与中间环螺栓连接，阀座与防尘圈螺栓连接，四层盘根与阀门推拉杆过盈配合，填料压套与阀门推拉杆间隙配合，填料压板与阀门推拉杆间隙配合，弹簧空套在阀门推拉杆上，密封圈与阀门推拉杆过盈配合。本发明不仅强度高，耐热耐腐蚀，抗冲刷，且摩擦系数低，自润滑性能好，而且具有很高的柔性、回弹能力和浮动性能。该结构提高了闸阀的密封性能，并大幅降低气缸腐蚀及卡死现象，显著提升闸阀的使用寿命，有效降低了阀门的实用和维护成本。
The invention discloses a valve combined sealing structure and a method thereof. It includes packing pressure plate, packing gland, four-layer packing, dustproof ring, connecting piece, sealing ring, spring, intermediate ring, valve seat, valve push-pull rod; Clearance fit, valve seat and intermediate ring bolt connection, valve seat and dust-proof ring bolt connection, four-layer packing interference fit with valve push-pull rod, clearance fit between packing gland and valve push-pull rod, clearance fit between packing pressure plate and valve push-pull rod , the spring is empty on the valve push-pull rod, and the sealing ring is in interference fit with the valve push-pull rod. The invention not only has high strength, heat resistance, corrosion resistance, erosion resistance, low friction coefficient, good self-lubricating performance, but also has high flexibility, resilience and floating performance. This structure improves the sealing performance of the gate valve, greatly reduces the corrosion and jamming of the cylinder, significantly improves the service life of the gate valve, and effectively reduces the practical and maintenance costs of the valve.
Description
技术领域 technical field
本发明涉及一种阀门组合式密封结构及其方法，特别是针对双阀板闸阀的密封。 The invention relates to a valve combined sealing structure and a method thereof, in particular to the sealing of a double valve plate gate valve.
背景技术 Background technique
密封性是闸阀好与坏的重要标准。为了防止被阻流的介质沿着阀门推拉杆进入气缸，造成气缸内部的腐蚀及堵塞，从而影响闸阀的正常使用，因此，闸阀必须做到良好的密封。 Sealing is an important criterion for good or bad gate valves. In order to prevent the blocked medium from entering the cylinder along the valve push-pull rod, causing corrosion and blockage inside the cylinder, thus affecting the normal use of the gate valve, the gate valve must be well sealed.
通常，闸阀的密封由密封圈与阀门推拉杆过盈配合来实现，但这种密封方法在高温、高压介质的工况下，很容易造成介质泄漏而导致密封失效，而且需要经常更换密封圈，使得闸阀的维护成本上升，这些问题一直困扰着使用者。 Usually, the sealing of the gate valve is realized by the interference fit between the sealing ring and the valve push-pull rod, but this sealing method is easy to cause medium leakage and cause sealing failure under the condition of high temperature and high pressure medium, and the sealing ring needs to be replaced frequently. Make the maintenance cost of gate valve rise, these problems have been bothering the user all the time.
发明内容 Contents of the invention
本发明的目的是克服现有技术的不足，提供阀门组合式密封结构及其方法。 The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a valve combined sealing structure and a method thereof.
一种阀门组合式密封结构包括填料压板、填料压套、四层盘根、防尘圈、联接件、密封圈、弹簧、中间环、阀座、阀门推拉杆；中间环与联接件螺栓连接，联接件与阀门推拉杆间隙配合，阀座与中间环螺栓连接，阀座与防尘圈螺栓连接，四层盘根与阀门推拉杆过盈配合，填料压套与阀门推拉杆间隙配合，填料压板与阀门推拉杆间隙配合，弹簧空套在阀门推拉杆上，密封圈与阀门推拉杆过盈配合。 A valve combined sealing structure includes packing pressure plate, packing gland, four-layer packing, dustproof ring, connecting piece, sealing ring, spring, intermediate ring, valve seat, valve push-pull rod; the intermediate ring is connected with the connecting piece by bolts, The connecting piece and the valve push-pull rod have clearance fit, the valve seat is connected with the middle ring by bolts, the valve seat is connected with the dust-proof ring by bolts, the four-layer packing has an interference fit with the valve push-pull rod, the packing gland and the valve push-pull rod have clearance fit, and the packing pressure plate The gap fits with the valve push-pull rod, the spring is sleeved on the valve push-pull rod, and the sealing ring is in interference fit with the valve push-pull rod.
所述的四层盘根的第一层和第四层采用碳纤维盘根，第二层采用聚四氟乙烯盘根，第三层采用柔性石墨盘根。 The first and fourth layers of the four-layer packing are made of carbon fiber packing, the second layer is made of polytetrafluoroethylene packing, and the third layer is made of flexible graphite packing.
所述结构的阀门组合式密封方法是：密封的液、气体介质沿阀门推拉杆依次经过防尘圈、四层盘根、密封圈发生泄漏; The valve combined sealing method of the structure is as follows: the sealed liquid and gas medium leak through the dustproof ring, four-layer packing and sealing ring along the valve push-pull rod in sequence;
防尘圈与阀座螺栓连接，且与阀门推拉杆过盈配合，阻挡泄露的液、气体介质，实现第一次密封；填料压板和填料压套将四层盘根压紧，由于热胀冷缩效应，弹簧起到调节压紧力的作用，四层盘根与阀门推拉杆过盈配合阻挡渗透过防尘圈的液、气体介质，实现第二次密封；密封圈与阀门推拉杆过盈配合，阻挡渗透过四层盘根的液、气体介质，实现第三次密封；通常此三次防渗漏密封，密封过程完毕。 The dust-proof ring is connected with the valve seat bolts, and is interference-fitted with the valve push-pull rod to block the leaked liquid and gas medium and realize the first seal; Compression effect, the spring plays the role of adjusting the pressing force, the interference fit between the four-layer packing and the valve push-pull rod blocks the liquid and gas medium that penetrates through the dust-proof ring, and realizes the second seal; the sealing ring and the valve push-pull rod interfere Cooperate to block the liquid and gas medium that penetrates through the four layers of packing, and realize the third sealing; usually, the three times of anti-leakage sealing, the sealing process is completed.
本发明与现有技术相比具有的有意效果是，可以保证用于密封的盘根不仅强度高，耐热耐腐蚀，抗冲刷，且摩擦系数低，自润滑性能好，而且具有很高的柔性、回弹能力和浮动性能，柔性石墨和聚四氟乙烯的混合填料，显著提高了盘根的抗剪切、抗拉性能，且有利于产生迷宫效应。四层盘根与两次密封圈的组合使用，大幅提高了闸阀的密封性能，气缸腐蚀及卡死现象大大减少，明显增加了闸阀的使用寿命，为使用者大大节省了维护成本。 Compared with the prior art, the invention has the intentional effect that the packing used for sealing not only has high strength, heat resistance, corrosion resistance, erosion resistance, low friction coefficient, good self-lubricating performance, but also has high flexibility , resilience and floating performance, the mixed filler of flexible graphite and polytetrafluoroethylene significantly improves the shear resistance and tensile performance of the packing, and is beneficial to produce a labyrinth effect. The combination of four-layer packing and two sealing rings greatly improves the sealing performance of the gate valve, greatly reduces the corrosion and jamming of the cylinder, significantly increases the service life of the gate valve, and greatly saves maintenance costs for users.
附图说明 Description of drawings
图1为阀门组合式密封结构的示意图； Fig. 1 is a schematic diagram of the combined sealing structure of the valve;
图中，填料压板1、填料压套2、四层盘根3、防尘圈4、联接件5、密封圈6、弹簧7、中间环8、阀座9、阀门推拉杆10。 In the figure, packing pressure plate 1, packing gland 2, four-layer packing 3, dustproof ring 4, coupling piece 5, sealing ring 6, spring 7, intermediate ring 8, valve seat 9, valve push-pull rod 10.
具体实施方式 detailed description
如图1所示，一种阀门组合式密封结构包括填料压板1、填料压套2、四层盘根3、防尘圈4、联接件5、密封圈6、弹簧7、中间环8、阀座9、阀门推拉杆10；中间环8与联接件5螺栓连接，联接件5与阀门推拉杆10间隙配合，阀座9与中间环8螺栓连接，阀座9与防尘圈4螺栓连接，四层盘根3与阀门推拉杆10过盈配合，填料压套2与阀门推拉杆10间隙配合，填料压板1与阀门推拉杆10间隙配合，弹簧7空套在阀门推拉杆10上，密封圈6与阀门推拉杆10过盈配合。 As shown in Figure 1, a valve combined sealing structure includes packing plate 1, packing gland 2, four-layer packing 3, dustproof ring 4, connecting piece 5, sealing ring 6, spring 7, intermediate ring 8, valve Seat 9, valve push-pull rod 10; intermediate ring 8 is bolted to connector 5, connector 5 is in clearance fit with valve push-pull rod 10, valve seat 9 is bolted to intermediate ring 8, valve seat 9 is bolted to dust-proof ring 4, The four-layer packing 3 has an interference fit with the valve push-pull rod 10, the packing gland 2 has a clearance fit with the valve push-pull rod 10, the packing pressure plate 1 has a clearance fit with the valve push-pull rod 10, the spring 7 has an empty sleeve on the valve push-pull rod 10, and the sealing ring 6 is interference fit with valve push-pull rod 10.
所述的四层盘根3的第一层和第四层采用碳纤维盘根，第二层采用聚四氟乙烯盘根，第三层采用柔性石墨盘根。 The first and fourth layers of the four-layer packing 3 are made of carbon fiber packing, the second layer is made of polytetrafluoroethylene packing, and the third layer is made of flexible graphite packing.
所述结构的阀门组合式密封方法如下： The valve combined sealing method of the described structure is as follows:
需要密封的液、气体介质会沿阀门推拉杆10依次经过防尘圈4、四层盘根3、密封圈6发生泄漏; The liquid and gas medium to be sealed will leak through the dustproof ring 4, four-layer packing 3, and sealing ring 6 along the valve push-pull rod 10;
防尘圈4与阀座9螺栓连接，且与阀门推拉杆10过盈配合，阻挡泄露的液、气体介质，实现第一次密封；填料压板1和填料压套2将四层盘根3压紧，由于热胀冷缩效应，弹簧7起到调节压紧力的作用，四层盘根3与阀门推拉杆10过盈配合阻挡渗透过防尘圈4的液、气体介质，实现第二次密封；密封圈6与阀门推拉杆10过盈配合，阻挡渗透过四层盘根3的液、气体介质，实现第三次密封；通常此三次防渗漏密封，实现对需要密封的液、气体介质的密封。 The dustproof ring 4 is connected with the valve seat 9 by bolts, and is interference-fitted with the valve push-pull rod 10 to block the leaked liquid and gas medium and realize the first seal; Due to the thermal expansion and contraction effect, the spring 7 plays the role of adjusting the pressing force, and the four-layer packing 3 and the valve push-pull rod 10 interfere with each other to block the liquid and gas medium that penetrates through the dust-proof ring 4, realizing the second time Sealing; the sealing ring 6 is in interference fit with the valve push-pull rod 10 to block the liquid and gas medium penetrating through the four-layer packing 3 to realize the third sealing; usually, the three times of anti-leakage sealing realize the sealing of the liquid and gas that need to be sealed. Medium sealing.
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| CN201410332072.6A CN104089041B (en) | 2014-07-14 | 2014-07-14 | The box-like hermetically-sealed construction of valve sets and method thereof |
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| CN201410332072.6A CN104089041B (en) | 2014-07-14 | 2014-07-14 | The box-like hermetically-sealed construction of valve sets and method thereof |
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| CN106224579A (en) * | 2016-08-28 | 2016-12-14 | 淳安千岛湖科利达耐磨阀门有限公司 | Oscillatory valve |
| CN106370594B (en) * | 2016-10-14 | 2019-02-01 | 河南科技大学 | Packing-leaf spring floating seal system core technical parameter measuring method and device |
| CN109883624B (en) * | 2019-04-11 | 2024-03-15 | 招商局重庆交通科研设计院有限公司 | Water tightness test equipment adopting cylindrical surface design |
| CN112096874B (en) * | 2020-08-31 | 2022-11-08 | 东台市光明机械密封有限公司 | A kind of high wear-resistant double-end mechanical seal and its processing technology |
| CN112297360A (en) * | 2020-10-26 | 2021-02-02 | 王书旭 | Injection mold that breaks away from fast |
| CN112377277B (en) * | 2020-11-27 | 2025-01-28 | 大唐陕西发电有限公司 | A push-pull rod sealing structure for steam turbine |
| CN112791756B (en) * | 2021-01-26 | 2024-11-08 | 北京微标标物科技有限公司 | A pipette |
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| US5238252A (en) * | 1990-01-18 | 1993-08-24 | Eisenwerk Heinrich Schilling Gmbh & Co. | Shut-off fittings with a sealing device |
| US5791629A (en) * | 1996-10-31 | 1998-08-11 | Fisher Controls International, Inc. | Bushing-less stem guided control valve |
| US8136792B2 (en) * | 2009-06-19 | 2012-03-20 | Equistar Chemicals, L.P. | Double containment valve system |
| CN201661763U (en) * | 2010-03-11 | 2010-12-01 | 浙江固特气动机械有限公司 | Gate valve |
| CN201925592U (en) * | 2010-09-13 | 2011-08-10 | 秦皇岛中青冶金阀门有限公司 | Oil chamber type gate valve sealing structure |
| CN102330820B (en) * | 2011-08-24 | 2012-10-31 | 江苏华青流体科技有限公司 | Mechanical seal device |
| CN203948678U (en) * | 2014-07-14 | 2014-11-19 | 浙江固特气动机械有限公司 | The box-like sealing configuration of a kind of valve sets |
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Denomination of invention: Valve combination sealing structure and its method Effective date of registration: 20230925 Granted publication date: 20160518 Pledgee: Zhejiang Longyou rural commercial bank Limited by Share Ltd. Pledgor: ZHEJIANG GUTE PNEUMATIC MACHINERY Co.,Ltd. Registration number: Y2023330002178 |
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