WO2021077710A1 - 一种可在线更换密封副的三偏心金属密封蝶阀结构 - Google Patents

一种可在线更换密封副的三偏心金属密封蝶阀结构 Download PDF

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WO2021077710A1
WO2021077710A1 PCT/CN2020/088637 CN2020088637W WO2021077710A1 WO 2021077710 A1 WO2021077710 A1 WO 2021077710A1 CN 2020088637 W CN2020088637 W CN 2020088637W WO 2021077710 A1 WO2021077710 A1 WO 2021077710A1
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Prior art keywords
sealing ring
valve
butterfly
valve body
screw
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PCT/CN2020/088637
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English (en)
French (fr)
Inventor
张清双
茅岭峰
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江苏神通阀门股份有限公司
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Publication of WO2021077710A1 publication Critical patent/WO2021077710A1/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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2261—Shaping or arrangements of the sealing the sealing being arranged on the valve member
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/226—Shaping or arrangements of the sealing
    • F16K1/2263—Shaping or arrangements of the sealing the sealing being arranged on the valve seat

Definitions

  • the invention relates to a triple-eccentric metal sealing butterfly valve, in particular to an ultra-low temperature butterfly valve used in LNG projects and other ultra-low temperature working conditions.
  • the butterfly valve that can replace the sealing pair online is often of double eccentric structure, and its sealing ring is made of copper alloy, but it is not suitable for sulfur-containing LNG ultra-low temperature conditions. Sulfide will corrode copper and seriously affect the sealing performance of the valve.
  • the double eccentric structure butterfly valve has many shortcomings and is not suitable for LNG working conditions. Its sealing principle is position sealing. The sealing surface of the butterfly plate and the valve seat is in line contact, which is realized by the elastic deformation caused by the butterfly plate squeezing the valve seat. Sealing has high requirements for the closed position, especially the metal valve seat, which often has disadvantages such as low pressure bearing capacity and large leakage.
  • the valve seat sealing ring cannot be directly aligned with the sealing point due to no positioning during installation, resulting in a mismatch between the sealing pair after installation, and the valve cannot be sealed when it cannot be sealed.
  • the seal pair is directly replaced.
  • the present invention provides a three-eccentric metal sealing butterfly valve structure capable of replacing the sealing pair on-line.
  • a triple-eccentric metal-sealed butterfly valve structure capable of replacing the sealing pair online, including a valve body, a limit pin a, three open loops, a lock nut, a screw a, a valve seat sealing ring, a multi-level sealing ring, and a limit pin b.
  • Butterfly plate, pressure plate, screw b, the valve body is provided with a valve seat sealing ring
  • the valve seat sealing ring is fixed in the valve body through a three-opening ring, a lock nut, and a screw a
  • a limit pin a is set between the valve seat sealing ring and the valve body
  • the limit pin a limits the seat sealing ring.
  • the butterfly plate is provided with a multi-level sealing ring.
  • the multi-level sealing ring is compressed and fixed on the butterfly plate by a pressure plate and a screw b.
  • the butterfly plate, multi-level sealing ring and The position of the pressure plate is fixed by the limit pin b, and the valve body is provided with an inspection chamber.
  • the multi-layer sealing ring is composed of flexible graphite + 304 stainless steel gasket.
  • the position of the sealing pair is determined by setting the limit pin during online replacement, which reduces the leakage risk of the butterfly valve and ensures the safe and effective operation of the LNG receiving station.
  • Fig. 1 is a schematic diagram of the structure of the present invention.
  • Fig. 2 is a partial enlarged view of A1 in Fig. 1.
  • Valve body 1. Limit pin a; 3. Three open loops; 4. Lock nut; 5. Screw a; 6. Seat seal ring; 7. Multi-layer seal ring; 8. Limit Pin b; 9. Butterfly plate; 10. Pressure plate; 11. Screw b; 12. Check and repair the warehouse.
  • a triple-eccentric metal-sealed butterfly valve with a seal pair that can be replaced online including a valve body 1, a limit pin a2, a triple open ring 3, a lock nut 4, a screw a5, and a valve seat sealing ring 6.
  • Multi-layer sealing ring 7, limit pin b8, butterfly plate 9, pressure plate 10, screw b11, valve seat sealing ring 6 is provided in valve body 1, valve seat sealing ring 6 passes through three open rings 3, lock nut 4 ,
  • the screw a5 is fixed in the valve body 1, the three-opening ring 3 and the screw a5 can be locked by the lock nut 4.
  • a limit pin a2 is set between the valve seat sealing ring and the valve body, and the limit pin a2 is on the valve seat sealing ring 6 for limit, the valve seat sealing ring 6 only needs to be aligned with the limit pin a2 when installing, the position is completely fixed, the pin hole on the valve body 1 and the pin hole on the valve seat sealing ring 6 are processed by the same tooling , To ensure the unity of position and size, and there will be no deviation.
  • the butterfly plate 9 is provided with a multi-level sealing ring 7, which is composed of flexible graphite + 304 stainless steel pad, and the multi-level sealing ring 7 passes through the pressure plate 10 and the screw b8 Compressed and fixed on the butterfly plate 9, the butterfly plate 9, the multi-layer sealing ring 7 and the pressure plate 10 are fixed in position by the limit pin b11.
  • the valve body 1 is provided with an inspection compartment opening 12, which can be sealed by the inspection compartment opening 12. The deputy performs online replacement.
  • Step 1 Release the pressure in the valve, loosen the cover nut of the overhaul compartment opening 12, and open the overhaul compartment opening 12 cover.
  • Step 2 Through the inspection compartment opening 12, loosen the screw a5, and take out the three-opening ring 3.
  • Step 3 Half-open the butterfly plate 9, take out the seat sealing ring 6, and take out the limit pin a2 between the seat sealing ring 6 and the valve body 1.
  • Step 4 Put the butterfly plate 9 in the closed position, loosen the screw b11, and take out the pressure plate 10.
  • Step 5 Take out the limit pin b8 and take out the multi-layer sealing ring 7.
  • Step 6 On-line replacement of the valve seat sealing ring 6 and the multi-layer sealing ring 7.
  • Step 7 Install the new multi-level sealing ring 7 on the butterfly plate, align it with the pin hole of the butterfly plate 9, and insert the limit pin b8.
  • Step 8 Install the pressure plate 10, and fix the pressure plate 10 with screws b11.
  • Step 9 Open the butterfly plate 9 to the half-open position, and install the limit pin a2 into the pin hole of the valve body 1.
  • Step 10 Install the new seat seal ring 6, align the pin hole on the seat seal ring 6 with the limit pin a2 on the valve body 1 and install it.
  • Step 11 Install the three-opening ring 3 and the screw a5, and fine-tune the position of the seat sealing ring 6 by tightening the screw a5. After the adjustment is completed, lock the screw a5 with the lock nut 5 and close the butterfly plate 9.
  • the position of the sealing pair is determined by setting the limit pin during online replacement, reducing the leakage risk of the butterfly valve, and ensuring the safe and effective operation of the LNG receiving station .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

一种可在线更换密封副的三偏心金属密封蝶阀结构，包括阀体（1）、限位销a（2）、三开环（3）、锁紧螺母（4）、螺钉a（5）、阀座密封圈（6）、多层次密封圈（7）、限位销b（8）、蝶板（9）、压板（10）、螺钉b（11），阀体内设置有阀座密封圈，阀座密封圈通过三开环、锁紧螺母、螺钉a固定于阀体内，阀座密封圈与阀体间设置有限位销a，限位销a对阀座密封圈进行限位，蝶板上设置有多层次密封圈，多层次密封圈通过压板、螺钉b压紧并固定在蝶板上，蝶板、多层次密封圈和压板通过限位销b进行位置固定，阀体上设置有检修仓口（12）。该结构解决了原三偏心结构无法在线更换密封副的缺点，在线更换时通过设置限位销，确定了密封副位置，降低了蝶阀的泄漏风险，确保LNG接收站的安全有效运行。

Description

一种可在线更换密封副的三偏心金属密封蝶阀结构 技术领域
本发明涉及一种三偏心金属密封蝶阀，特别涉及LNG项目及其他超低温工况用的超低温蝶阀。
 背景技术
目前常用可在线更换密封副的蝶阀常为双偏心结构，其密封圈采用铜合金制造，但其不适用于含硫LNG超低温工况中，硫化物会对铜造成腐蚀，严重影响阀门密封性能。同时，双偏心结构蝶阀缺点较多，不适用于LNG工况，其密封原理属位置密封，蝶板与阀座的密封面为线接触，依靠蝶板挤压阀座所造成的弹性变形来实现密封，对关闭位置要求很高，特别是金属阀座，常存在承压能力低、泄漏量大等缺点。而常见三偏心结构因密封副密封面为斜锥式，阀座密封圈安装时因无定位无法直接找正密封点，导致安装后密封副间不相匹配而出现无法密封的现象时无法对阀门密封副直接进行更换。
 技术问题
为克服上述现有技术问题，本发明提供了一种可在线更换密封副的三偏心金属密封蝶阀结构。
 技术解决方案
一种可在线更换密封副的三偏心金属密封蝶阀结构，包括阀体、限位销a、三开环、锁紧螺母、螺钉a、阀座密封圈、多层次密封圈、限位销b、蝶板、压板、螺钉b，阀体内设置有阀座密封圈，阀座密封圈通过三开环、锁紧螺母、螺钉a固定于阀体内，阀座密封圈与阀体间设置有限位销a，限位销a对阀座密封圈进行限位，蝶板上设置有多层次密封圈，多层次密封圈通过压板、螺钉b压紧并固定在蝶板上，蝶板、多层次密封圈和压板通过限位销b进行位置固定，阀体上设置有检修仓口。
进一步地，多层次密封圈由柔性石墨+304不锈钢垫组成。
 有益效果
解决了原三偏心结构无法在线更换密封副的缺点，在线更换时通过设置限位销，确定了密封副位置，降低了蝶阀的泄漏风险，确保LNG接收站的安全有效运行。
 附图说明
图1是本发明的结构示意图。
图2是图1中A1的局部放大图。
图中：1.阀体；2.限位销a；3.三开环；4.锁紧螺母；5.螺钉a；6.阀座密封圈；7.多层次密封圈；8.限位销b；9.蝶板；10.压板；11.螺钉b；12. 检修仓口。
 本发明的最佳实施方式
如图1-2所示，一种可在线更换密封副的三偏心金属密封蝶阀结构，包括阀体1、限位销a2、三开环3、锁紧螺母4、螺钉a5、阀座密封圈6、多层次密封圈7、限位销b8、蝶板9、压板10、螺钉b11，阀体1内设置有阀座密封圈6，阀座密封圈6通过三开环3、锁紧螺母4、螺钉a5固定于阀体1内，三开环3、螺钉a5通过锁紧螺母4可进行锁紧，阀座密封圈与阀体间设置有限位销a2，限位销a2对阀座密封圈6进行限位，阀座密封圈6安装时仅需对准限位销a2安装即可，位置完全固定，阀体1上的销孔与阀座密封圈6上的销孔采用同一工装进行加工，保证位置尺寸的统一性，不会出现偏差，蝶板9上设置有多层次密封圈7，多层次密封圈7由柔性石墨+304不锈钢垫组成，多层次密封圈7通过压板10、螺钉b8压紧并固定在蝶板9上，蝶板9、多层次密封圈7和压板10通过限位销b11进行位置固定，阀体1上设置有检修仓口12，可通过检修仓口12对密封副进行在线更换。
更换步骤如下。
步骤一：将阀门内压力释放，松开检修仓口12盖板螺母，打开检修仓口12盖板。
步骤二：通过检修仓口12，松开螺钉a5，取出三开环3。
步骤三：将蝶板9半开，取出阀座密封圈6，取出阀座密封圈6与阀体1间的限位销a2。
步骤四：将蝶板9处于关闭位置，松开螺钉b11，取出压板10。
步骤五：取出限位销b8，取出多层次密封圈7。
步骤六：对阀座密封圈6和多层次密封圈7进行在线更换。
步骤七：将新的多层次密封圈7安装至蝶板上，与蝶板9销孔对准，插入限位销b8。
步骤八：安装压板10，通过螺钉b11将压板10进行固定。
步骤九：打开蝶板9至半开位置，将限位销a2安装至阀体1销孔内。
步骤十：安装新的阀座密封圈6，将阀座密封圈6上的销孔对准阀体1上的限位销a2安装。
步骤十一：安装三开环3及螺钉a5，通过拧紧螺钉a5微调阀座密封圈6位置，调整完成后用锁紧螺母5将螺钉a5锁死，关闭蝶板9。
通过本技术方案解决了原三偏心结构无法在线更换密封副的缺点，在线更换时通过设置限位销的方法，确定了密封副位置，降低了蝶阀的泄漏风险，确保LNG接收站的安全有效运行。
本具体实施例仅仅是对本发明的解释，其并不是对本发明的限制，本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改，但只要在本发明的权利要求范围内都受到专利法的保护。

Claims (2)

  1. 一种可在线更换密封副的三偏心金属密封蝶阀结构，包括阀体、限位销a、三开环、锁紧螺母、螺钉a、阀座密封圈、多层次密封圈、限位销b、蝶板、压板、螺钉b，其特征在于：所述阀体内设置有阀座密封圈，所述阀座密封圈通过三开环、锁紧螺母、螺钉a固定于阀体内，所述阀座密封圈与阀体间设置有限位销a，所述限位销a对阀座密封圈进行限位，所述蝶板上设置有多层次密封圈，所述多层次密封圈通过压板、螺钉b压紧并固定在蝶板上，所述蝶板、多层次密封圈和压板通过限位销b进行位置固定，所述阀体上设置有检修仓口。
  2. 如权利要求1所述一种可在线更换密封副的三偏心金属密封蝶阀结构，其特征在于：所述多层次密封圈由柔性石墨+304不锈钢垫组成。
PCT/CN2020/088637 2019-10-23 2020-05-06 一种可在线更换密封副的三偏心金属密封蝶阀结构 WO2021077710A1 (zh)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110608290A (zh) * 2019-10-23 2019-12-24 江苏神通阀门股份有限公司 一种可在线更换密封副的三偏心金属密封蝶阀结构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207325A2 (de) * 2000-11-20 2002-05-22 Linde Aktiengesellschaft Absperrarmatur
CN2861644Y (zh) * 2005-12-29 2007-01-24 林�建 三偏心无泄漏蝶阀
CN104179994A (zh) * 2013-05-26 2014-12-03 江苏络科阀门有限公司 全金属双向高压蝶阀
CN107289143A (zh) * 2017-08-20 2017-10-24 浙江贝尔控制阀门有限公司 一种大口径高温高压全金属密封蝶阀
CN206943442U (zh) * 2017-04-13 2018-01-30 江南阀门有限公司 一种三偏心蝶阀
CN208634402U (zh) * 2018-08-31 2019-03-22 浙江北泽阀门科技有限公司 一种双密封三偏心金属密封双向压蝶阀
CN110608290A (zh) * 2019-10-23 2019-12-24 江苏神通阀门股份有限公司 一种可在线更换密封副的三偏心金属密封蝶阀结构
CN110715061A (zh) * 2019-10-23 2020-01-21 江苏神通阀门股份有限公司 一种三偏心金属密封蝶阀在线更换密封副的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496217A1 (fr) * 1980-12-12 1982-06-18 Realisations Meca Ste Meusienn Dispositif d'etancheite pour vanne
JP5132618B2 (ja) * 2009-03-24 2013-01-30 株式会社シー・オー・シー バタフライ弁装置
CN201535363U (zh) * 2009-04-16 2010-07-28 江苏苏阀高压阀门有限公司 三偏心硬密封蝶阀密封副结构
CN201827390U (zh) * 2010-09-20 2011-05-11 天工阀门集团有限公司 带检修孔的三偏心多层次硬密封蝶阀
CN201779279U (zh) * 2010-09-20 2011-03-30 天工阀门集团有限公司 带检修孔的三偏心金属硬密封蝶阀
CN105179714A (zh) * 2015-10-23 2015-12-23 天津市华顺通阀门有限公司 三偏心双向硬密封蝶阀
CN106051179A (zh) * 2016-07-29 2016-10-26 上海凯工阀门有限公司 一种高性能金属硬密封蝶阀
CN208634400U (zh) * 2018-08-31 2019-03-22 浙江北泽阀门科技有限公司 一种三偏心双向全金属硬密封蝶阀
CN210661404U (zh) * 2019-10-23 2020-06-02 江苏神通阀门股份有限公司 一种可在线更换密封副的三偏心金属密封蝶阀结构

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207325A2 (de) * 2000-11-20 2002-05-22 Linde Aktiengesellschaft Absperrarmatur
CN2861644Y (zh) * 2005-12-29 2007-01-24 林�建 三偏心无泄漏蝶阀
CN104179994A (zh) * 2013-05-26 2014-12-03 江苏络科阀门有限公司 全金属双向高压蝶阀
CN206943442U (zh) * 2017-04-13 2018-01-30 江南阀门有限公司 一种三偏心蝶阀
CN107289143A (zh) * 2017-08-20 2017-10-24 浙江贝尔控制阀门有限公司 一种大口径高温高压全金属密封蝶阀
CN208634402U (zh) * 2018-08-31 2019-03-22 浙江北泽阀门科技有限公司 一种双密封三偏心金属密封双向压蝶阀
CN110608290A (zh) * 2019-10-23 2019-12-24 江苏神通阀门股份有限公司 一种可在线更换密封副的三偏心金属密封蝶阀结构
CN110715061A (zh) * 2019-10-23 2020-01-21 江苏神通阀门股份有限公司 一种三偏心金属密封蝶阀在线更换密封副的方法

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