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WO2018053662A1 - Supercritical small diameter corrugated pipe spherical sealing forged shut-off valve - Google Patents

Supercritical small diameter corrugated pipe spherical sealing forged shut-off valve Download PDF

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Publication number
WO2018053662A1
WO2018053662A1 PCT/CN2016/000532 CN2016000532W WO2018053662A1 WO 2018053662 A1 WO2018053662 A1 WO 2018053662A1 CN 2016000532 W CN2016000532 W CN 2016000532W WO 2018053662 A1 WO2018053662 A1 WO 2018053662A1
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WIPO (PCT)
Prior art keywords
valve
bracket
supercritical
sealing ball
nut
Prior art date
Application number
PCT/CN2016/000532
Other languages
French (fr)
Chinese (zh)
Inventor
沈静静
Original Assignee
沈静静
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 沈静静 filed Critical 沈静静
Priority to PCT/CN2016/000532 priority Critical patent/WO2018053662A1/en
Publication of WO2018053662A1 publication Critical patent/WO2018053662A1/en

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Classifications

    • 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
    • F16K1/14—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 ball-shaped 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
    • 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
    • F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube

Definitions

  • the utility model relates to the field of a shut-off valve, in particular to a supercritical small-diameter bellows spherical seal forged cut-off valve. Background technique
  • the bellows check valve has a reasonable sealing structure and corrosion resistance, long service life, less maintenance, and lower operating costs.
  • the rugged, bellows seal design ensures zero leakage of the stem and provides maintenance-free conditions.
  • the valve opening and closing torque is small, reducing labor intensity
  • the outer seal of the valve is sealed with a bellows seal and a graphite and stainless steel ring.
  • the seal is reliable and can be used without long-term replacement. Strictly adopt advanced foreign standards in design and manufacture.
  • the corrugated tube spherical seal forged cut-off valve has beautiful appearance, and the valve passage has a smooth flow line, which reduces the flow resistance coefficient of the valve, and is a kind of energy-saving product with high quality.
  • the utility model provides a supercritical small-diameter bellows spherical seal forged cut-off valve, which is cleverly designed and convenient to use, and solves the technical problem that the valve has a short service life and improves the valve use temperature, and satisfies the working condition.
  • valve stem and the sealing ball are integrally formed.
  • the inlet and the outlet of the valve body respectively have a tube receiving and bending welding ring groove.
  • the sealing ring is a hard seal and is formed by F316 stainless steel.
  • the threshold seat and the sealing surface of the sealing ball are welded with a layer of STL cemented carbide.
  • the two sides of the pressure plate are fixed on both sides of the bracket by joint bolts, cylindrical pins and nuts, and the lower end of the joint bolt is fixed on the bracket through the round pin.
  • the upper end of the joint bolt is inserted through the pressure plate and locked by a nut.
  • the advantage of the utility model is that the structure is different: the original valve stem is separated from the valve flap and is now integral.
  • the original valve flap is a tapered seal. It is now spherically sealed and automatically centered. It is not easy to leak.
  • Operating temperature Originally 350 degrees or less, it is now 600 degrees.
  • Use pressure Original 600LB or less, now 1500LB.
  • the valve stem is driven by a small pitch thread to achieve a small amount of flow adjustment.
  • Seal Original soft seal (medium head gasket), now hard seal (F316 stainless steel).
  • Figure 1 is a schematic view of the present invention.
  • valve body 1 sealing ball 2, sealing ring 3, valve stem 5, bellows 6, valve cover 19, packing pad 18, packing 8, compression sleeve 10.
  • the pressure plate 12, the bracket 7, the valve stem nut 14, the hand wheel 15, the sealing ball 2 is arranged in the middle of the valve body 1, the valve seat is designed between the sealing ball 2 and the valve body 1, and the upper end of the sealing ball 2 is connected with the wide rod 5,
  • the upper end of the valve body 1 is provided with a valve cover 19, a sealing ring 3 is arranged between the valve cover 19 and the valve body 1, the upper end of the valve cover 19 is connected with the bracket 7, and a bellows 6 is arranged between the valve stem 5 and the valve cover 19, and the bracket 7 is provided.
  • a packing pad 18 and a packing 8 are sequentially arranged with the valve rod 5, and the packing 8 is pressed against the packing pad 18.
  • the packing 8 is pressed with a pressing sleeve 10, and the upper end of the pressing sleeve 10 is pressed with a pressing plate 12, and the pressing plate 12 is fixed on both sides of the supporting plate 12
  • the valve stem 5 is provided with a valve stem nut 14 at the upper end, and the valve stem 14 is provided with a hand wheel 15, and the hand wheel 15 is locked to the upper end of the valve stem nut 14 by a lock nut 16.
  • the valve stem 5 and the sealing ball 2 are integrally formed.
  • the inlet and the outlet of the valve body 1 respectively have a tube receiving and bending ring groove 4.
  • the seal ring 3 is a hard seal and is formed by F316 stainless steel.
  • valve seat and the sealing surface of the sealing ball 2 are welded with a layer of STL cemented carbide 17.
  • the two sides of the pressure plate 12 are fixed on the two sides of the bracket 7 by a joint bolt 11 , a cylindrical pin 9 and a nut 13 .
  • the lower end of the joint bolt 11 is fixed on the bracket 7 through a cylindrical pin 9 , and the upper end of the joint bolt 11 penetrates the pressure plate 12 . Then lock through the aunt 13 .
  • the pipe body When the utility model is used, the pipe body is provided with a pipe bearing curved welding ring groove 4 on both sides of the valve body to facilitate the welding connection after the pipe is inserted, the rotating hand wheel is used to raise the valve stem, and at the same time, the sealing ball is raised, and the valve stem is driven by a small pitch thread. It can realize the slight adjustment of the flow rate.
  • the sealing ball is a spherical seal, which is automatically centered and is not easy to leak.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

A supercritical small diameter corrugated pipe spherical sealing forged shut-off valve, comprising a valve body (1), a sealing ball (2), a sealing ring (3), a valve rod (5), a corrugated pipe (6), a valve cover (19), a filler pad (18), filler (8), a pressing sleeve (10), a pressing plate (12), a bracket (7), a valve rod nut (14), and a handwheel (15), the sealing ball (2) being arranged in the middle of the valve body (1), a valve seat being designed between the sealing ball (2) and the valve body (1), the upper end of the sealing ball (2) being connected to the valve rod (5), the valve cover (19) being mounted on the upper end of the valve body (1), the sealing ring (3) being mounted between the valve cover (19) and the valve body (1), the upper end of the valve cover (19) being connected to the bracket (7), the corrugated pipe (6) being mounted between the valve rod (5) and the valve cover (19), the filler pad (18) and the filler (8) being arranged in turn between the bracket (7) and the valve rod (5), the filler pad (18) being pressed by the filler (8), the filler (8) being pressed by the pressing sleeve (10), the upper end of the pressing sleeve (10) being pressed by the pressing plate (12), two sides of the pressing plate (12) being fixed on both sides of the bracket (7), the valve rod nut (14) being mounted on the upper end of the valve (5), the handwheel (15) being mounted on the valve rod nut (14), and the handwheel (15) being locked onto the upper end of the valve rod nut (14) by means of a locking nut (16). The present shut-off valve has an ingenious design, is convenient to use, and solves the technical problems of the short service life of valves and increasing valve operating temperatures, thus suiting operating conditions.

Description

说明书  Instruction manual
超临界小口径波紋管球面密封锻造截止阀  Supercritical small diameter bellows spherical seal forged cut-off valve
技术领域 Technical field
本实用新型涉及截止阀领域，具体涉及一种超临界小口径波紋管球面密封锻造截止阀。 背景技术  The utility model relates to the field of a shut-off valve, in particular to a supercritical small-diameter bellows spherical seal forged cut-off valve. Background technique
目前国内采用的截止阓都存在着制造要求髙、容易泄漏、使用寿命短等缺点。波紋管截 止阀具有合理的密封结构和耐腐蚀性能， 使用寿命长， 维修次数少， 降低经营成本。坚固耐 用的波紋管密封设计， 保证阀杆的零泄漏， 提供无需维护的条件。 阀门启闭力矩小， 减小劳 动强度  At present, the cut-off defects adopted in China all have shortcomings such as defective manufacturing requirements, easy leakage, and short service life. The bellows check valve has a reasonable sealing structure and corrosion resistance, long service life, less maintenance, and lower operating costs. The rugged, bellows seal design ensures zero leakage of the stem and provides maintenance-free conditions. The valve opening and closing torque is small, reducing labor intensity
阀门的外密封采用波纹管密封和石墨、不锈钢环密封， 密封可靠， 长久使用可不用更换 密封填料。 在设计和制造上严格采用国外先进标准。  The outer seal of the valve is sealed with a bellows seal and a graphite and stainless steel ring. The seal is reliable and can be used without long-term replacement. Strictly adopt advanced foreign standards in design and manufacture.
波纹管球面密封锻造截止阀， 外型美观， 阀门通道有着流畅的流线， 减少阀门的流阻系数， 是一种髙质量的节能产品。 The corrugated tube spherical seal forged cut-off valve has beautiful appearance, and the valve passage has a smooth flow line, which reduces the flow resistance coefficient of the valve, and is a kind of energy-saving product with high quality.
发明内容 Summary of the invention
为了解决上述问题，本实用新型提出了一种超临界小口径波紋管球面密封锻造截止阀， 设计巧妙，使用方便，解决阀门使用寿命短和提高阀门使用温度的技术问题，满足使用工况。  In order to solve the above problems, the utility model provides a supercritical small-diameter bellows spherical seal forged cut-off valve, which is cleverly designed and convenient to use, and solves the technical problem that the valve has a short service life and improves the valve use temperature, and satisfies the working condition.
为了达到上述发明目的， 本实用新型提出了以下技术方案：  In order to achieve the above object, the present invention proposes the following technical solutions:
超临界小口径波纹管球面密封锻造截止阀， 阔体、 密封球、 密封环、 阀杆、 波紋管、 阀盖、 填料垫、 填料、 压套、 压板、 支架、 阀杆螺母、 手轮， 阀体中间装有密封球， 密封球 与阀体之间设计有阀座，密封球上端连接阀杆， 阀体上端装有阀盖， 阀盖与阀体之间装有密 封环， 阀盖上端连接支架， 阀杆与阀盖之间装有波紋管， 支架与阈杆之间依次装有填料垫、 填料， 填料压在填料垫上， 填料上面压有压套， 压套上端压有压板， 压板两侧固定在支架两 侧，阀杆上端装有阀杆螺母，阀杆螺母上装有手轮，手轮通过锁紧螺母锁紧在阈杆螺母上端。  Supercritical small diameter bellows spherical seal forged globe valve, wide body, sealing ball, sealing ring, valve stem, bellows, bonnet, packing pad, packing, compression sleeve, pressure plate, bracket, stem nut, hand wheel, valve The sealing ball is arranged in the middle of the body, the valve seat is designed between the sealing ball and the valve body, the upper end of the sealing ball is connected with the valve stem, the upper end of the valve body is provided with a valve cover, a sealing ring is arranged between the valve cover and the valve body, and the upper end of the valve cover is connected A bracket is arranged between the valve stem and the valve cover, and a packing pad and a filler are sequentially arranged between the bracket and the threshold rod, and the packing is pressed on the packing pad, and the pressing sleeve is pressed on the packing, and the pressing plate is pressed on the upper end of the pressing sleeve, and the pressing plate is pressed The side is fixed on both sides of the bracket, the valve stem nut is mounted on the upper end of the valve stem, the hand wheel is mounted on the valve stem nut, and the hand wheel is locked on the upper end of the threshold rod nut by the lock nut.
所述的阀杆与密封球是一体制作成型。  The valve stem and the sealing ball are integrally formed.
所述的阀体的进口与出口分别开有管子承插曲焊接环槽。  The inlet and the outlet of the valve body respectively have a tube receiving and bending welding ring groove.
所述的密封环是硬密封， 采用 F316不锈钢制作成型。  The sealing ring is a hard seal and is formed by F316 stainless steel.
所述的阈座与密封球的密封面堆焊一层 STL硬质合金。  The threshold seat and the sealing surface of the sealing ball are welded with a layer of STL cemented carbide.
所述的压板两侧通过活节螺栓、 圆柱销、 螺母固定在支架两侧， 活节螺栓下端通过圆 柱销固定在支架上， 活节螺栓上端贯穿压板之后通过螺母锁紧。  The two sides of the pressure plate are fixed on both sides of the bracket by joint bolts, cylindrical pins and nuts, and the lower end of the joint bolt is fixed on the bracket through the round pin. The upper end of the joint bolt is inserted through the pressure plate and locked by a nut.
本实用新型的优点是结构不同： 原阀杆与阀瓣分开， 现为整体式。 原阀瓣是锥面密封， 现改球面密封， 自动对中， 不容易泄漏。使用温度： 原 350度以下，现为 600度。使用压力： 原 600LB以下，现为 1500LB。阀杆采用小螺距螺纹传动，可实现对流量微量调节。密封： 原 软密封（中头垫片)，现为硬密封 (F316不锈钢)。  The advantage of the utility model is that the structure is different: the original valve stem is separated from the valve flap and is now integral. The original valve flap is a tapered seal. It is now spherically sealed and automatically centered. It is not easy to leak. Operating temperature: Originally 350 degrees or less, it is now 600 degrees. Use pressure: Original 600LB or less, now 1500LB. The valve stem is driven by a small pitch thread to achieve a small amount of flow adjustment. Seal: Original soft seal (medium head gasket), now hard seal (F316 stainless steel).
附图说明 DRAWINGS
图 1是本实用新型的示意图。  Figure 1 is a schematic view of the present invention.
具体实施方式 detailed description
参照附图 1， 超临界小口径波紋管球面密封锻造截止阀， 阀体 1、 密封球 2、 密封环 3、 阀杆 5、 波纹管 6、 阀盖 19、 填料垫 18、 填料 8、 压套 10、 压板 12、 支架 7、 阀杆螺母 14、 手轮 15， 阀体 1中间装有密封球 2， 密封球 2与阀体 1之间设计有阀座，密封球 2上端连接 阔杆 5, 阀体 1上端装有阀盖 19， 阀盖 19与阀体 1之间装有密封环 3, 阀盖 19上端连接支 架 7，阀杆 5与阀盖 19之间装有波纹管 6,支架 7与阀杆 5之间依次装有填料垫 18、填料 8， 填料 8压在填料垫 18上， 填料 8上面压有压套 10,压套 10上端压有压板 12，压板 12两侧 固定在支架 7两侧， 阀杆 5上端装有阀杆螺母 14， 阀杆嫘母 14上装有手轮 15, 手轮 15通 过锁紧螺母 16锁紧在阀杆螺母 14上端。 所述的阀杆 5与密封球 2是一体制作成型。 Referring to Figure 1, supercritical small-diameter bellows spherical seal forged cut-off valve, valve body 1, sealing ball 2, sealing ring 3, valve stem 5, bellows 6, valve cover 19, packing pad 18, packing 8, compression sleeve 10. The pressure plate 12, the bracket 7, the valve stem nut 14, the hand wheel 15, the sealing ball 2 is arranged in the middle of the valve body 1, the valve seat is designed between the sealing ball 2 and the valve body 1, and the upper end of the sealing ball 2 is connected with the wide rod 5, The upper end of the valve body 1 is provided with a valve cover 19, a sealing ring 3 is arranged between the valve cover 19 and the valve body 1, the upper end of the valve cover 19 is connected with the bracket 7, and a bellows 6 is arranged between the valve stem 5 and the valve cover 19, and the bracket 7 is provided. A packing pad 18 and a packing 8 are sequentially arranged with the valve rod 5, and the packing 8 is pressed against the packing pad 18. The packing 8 is pressed with a pressing sleeve 10, and the upper end of the pressing sleeve 10 is pressed with a pressing plate 12, and the pressing plate 12 is fixed on both sides of the supporting plate 12 On both sides of the valve 7, the valve stem 5 is provided with a valve stem nut 14 at the upper end, and the valve stem 14 is provided with a hand wheel 15, and the hand wheel 15 is locked to the upper end of the valve stem nut 14 by a lock nut 16. The valve stem 5 and the sealing ball 2 are integrally formed.
所述的阀体 1的进口与出口分别开有管子承插曲焊接环槽 4。  The inlet and the outlet of the valve body 1 respectively have a tube receiving and bending ring groove 4.
所述的密封环 3是硬密封， 采用 F316不锈钢制作成型。  The seal ring 3 is a hard seal and is formed by F316 stainless steel.
所述的阀座与密封球 2的密封面堆焊一层 STL硬质合金 17。  The valve seat and the sealing surface of the sealing ball 2 are welded with a layer of STL cemented carbide 17.
所述的压板 12两侧通过活节蟪栓 11、 圆柱销 9、 螺母 13固定在支架 7两侧， 活节螺 栓 11下端通过圆柱销 9固定在支架 7上， 活节螺栓 11上端贯穿压板 12之后通过嫘母 13 锁紧。  The two sides of the pressure plate 12 are fixed on the two sides of the bracket 7 by a joint bolt 11 , a cylindrical pin 9 and a nut 13 . The lower end of the joint bolt 11 is fixed on the bracket 7 through a cylindrical pin 9 , and the upper end of the joint bolt 11 penetrates the pressure plate 12 . Then lock through the aunt 13 .
本实用新型使用时， 阀体两侧开有管子承插曲焊接环槽 4便于管路插接之后焊接连接， 旋转手轮使阀杆上升， 同时是密封球上升， 阀杆采用小螺距螺纹传动， 可实现对流量微量调 节， 密封球是球面密封， 自动对中， 不容易泄漏。  When the utility model is used, the pipe body is provided with a pipe bearing curved welding ring groove 4 on both sides of the valve body to facilitate the welding connection after the pipe is inserted, the rotating hand wheel is used to raise the valve stem, and at the same time, the sealing ball is raised, and the valve stem is driven by a small pitch thread. It can realize the slight adjustment of the flow rate. The sealing ball is a spherical seal, which is automatically centered and is not easy to leak.

Claims

权利要求书 Claim
、 超临界小口径波紋管球面密封锻造截止阀， 阀体、 密封球、 密封环、 阀杆、 波纹管、 阀 盖、 填料垫、 填料、 压套、 压板、 支架、 阀杆螺母、 手轮， 其特征是阀体中间装有密封 球， 密封球与阀体之间设计有阀座， 密封球上端连接阔杆， 闽体上端装有阀盖， 阀盖与 阀体之间装有密封环， 阀盖上端连接支架， 阔杆与阀盖之间装有波纹管， 支架与阓杆之 间依次装有填料垫、填料，填料压在填料垫上， 填料上面压有压套，压套上端压有压板， 压板两侧固定在支架两侧， 阀杆上端装有阀杆螺母， 阀杆螺母上装有手轮， 手轮通过锁 紧螺母锁紧在阀杆螺母上端。 , supercritical small diameter bellows spherical seal forged cut-off valve, valve body, sealing ball, seal ring, valve stem, bellows, bonnet, packing pad, packing, compression sleeve, pressure plate, bracket, stem nut, hand wheel, The utility model is characterized in that a sealing ball is arranged in the middle of the valve body, a valve seat is arranged between the sealing ball and the valve body, a wide rod is connected to the upper end of the sealing ball, a valve cover is arranged on the upper end of the body, and a sealing ring is arranged between the valve cover and the valve body. The upper end of the bonnet is connected to the bracket, and a bellows is arranged between the wide rod and the valve cover. A packing pad and a packing are sequentially arranged between the bracket and the mast, and the packing is pressed on the packing pad, and the packing is pressed on the packing, and the upper end of the pressing sleeve is pressed. The pressure plate has two sides fixed on the two sides of the bracket, a valve stem nut is arranged on the upper end of the valve stem, a hand wheel is mounted on the valve stem nut, and the hand wheel is locked on the upper end of the valve stem nut by a lock nut.
、 根据权利要求 1所述的超临界小口径波纹管球面密封锻造截止阔，其特征是所述的阀杆 与密封球是一体制作成型。 The supercritical small-diameter bellows spherical seal forging cut-off width according to claim 1, wherein the valve stem and the sealing ball are integrally formed.
、 根据权利要求 1所述的超临界小口径波紋管球面密封锻造截止阈，其特征是所述的阀体 的进口与出口分别开有管子承插曲焊接环槽。 The forging threshold of the supercritical small-diameter bellows spherical seal forging according to claim 1, wherein the inlet and the outlet of the valve body are respectively provided with a pipe-supporting curved welding ring groove.
、 根据权利要求 1所述的超临界小口径波紋管球面密封锻造截止阀，其特征是所述的密封 环是硬密封， 采用 F316不锈钢制作成型。 The supercritical small-diameter bellows spherical seal forged cut-off valve according to claim 1, wherein the seal ring is a hard seal and is formed by F316 stainless steel.
、 根据权利要求 1所述的超临界小口径波纹管球面密封锻造截止阈，其特征是所述的阀座 与密封球的密封面堆焊一层 STL硬质合金。 The supercritical small-diameter bellows spherical seal forging cut-off threshold according to claim 1, wherein the sealing seat of the valve seat and the sealing ball is welded with a layer of STL cemented carbide.
、 根据权利要求 1所述的超临界小口径波紋管球面密封锻造截止阀，其特征是所述的压板 两侧通过活节螺栓、 圆柱销、 螺母固定在支架两侧， 活节螺栓下端通过圆柱销固定在支 架上， 活节螺栓上端贯穿压板之后通过螺母锁紧。 The supercritical small-diameter bellows spherical seal forged cut-off valve according to claim 1, wherein the two sides of the pressure plate are fixed on both sides of the bracket by a joint bolt, a cylindrical pin and a nut, and the lower end of the joint bolt passes through the cylinder. The pin is fixed on the bracket, and the upper end of the joint bolt is locked by a nut after penetrating through the pressure plate.
PCT/CN2016/000532 2016-09-22 2016-09-22 Supercritical small diameter corrugated pipe spherical sealing forged shut-off valve WO2018053662A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113324041A (en) * 2021-05-28 2021-08-31 中国华能集团清洁能源技术研究院有限公司 Valve structure suitable for ultrahigh-temperature steam parameters and manufacturing method

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US4911412A (en) * 1989-05-19 1990-03-27 Nupro Company Valves with improved actuators
CN2317375Y (en) * 1997-10-20 1999-05-05 吕海常 Medium-high-pressure bellow stop valve
CN1310305A (en) * 2000-01-21 2001-08-29 昭和电工株式会社 Halogen corrosive gas valve and its producing method
WO2008011057A2 (en) * 2006-07-18 2008-01-24 Nea Electronics, Inc. Non-pyrotechnic isolation valve element
CN203614767U (en) * 2013-12-27 2014-05-28 浙江科正阀门有限公司 Corrugated pipe forged steel valve
CN204647346U (en) * 2015-05-13 2015-09-16 南通国电电站阀门有限公司 Manually bellows forges welding end cut-off throttle valve without spin
CN205639641U (en) * 2016-05-19 2016-10-12 南通国电电站阀门股份有限公司 Sealed stop valve that forges of overcritical small -bore bellows sphere

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4911412A (en) * 1989-05-19 1990-03-27 Nupro Company Valves with improved actuators
CN2317375Y (en) * 1997-10-20 1999-05-05 吕海常 Medium-high-pressure bellow stop valve
CN1310305A (en) * 2000-01-21 2001-08-29 昭和电工株式会社 Halogen corrosive gas valve and its producing method
WO2008011057A2 (en) * 2006-07-18 2008-01-24 Nea Electronics, Inc. Non-pyrotechnic isolation valve element
CN203614767U (en) * 2013-12-27 2014-05-28 浙江科正阀门有限公司 Corrugated pipe forged steel valve
CN204647346U (en) * 2015-05-13 2015-09-16 南通国电电站阀门有限公司 Manually bellows forges welding end cut-off throttle valve without spin
CN205639641U (en) * 2016-05-19 2016-10-12 南通国电电站阀门股份有限公司 Sealed stop valve that forges of overcritical small -bore bellows sphere

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113324041A (en) * 2021-05-28 2021-08-31 中国华能集团清洁能源技术研究院有限公司 Valve structure suitable for ultrahigh-temperature steam parameters and manufacturing method

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