CN113202944A - Cryogenic single-valve-seat forced sealing valve convenient for online maintenance - Google Patents

Cryogenic single-valve-seat forced sealing valve convenient for online maintenance Download PDF

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Publication number
CN113202944A
CN113202944A CN202110526441.5A CN202110526441A CN113202944A CN 113202944 A CN113202944 A CN 113202944A CN 202110526441 A CN202110526441 A CN 202110526441A CN 113202944 A CN113202944 A CN 113202944A
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China
Prior art keywords
valve
seat
sealing
ball
valve body
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CN202110526441.5A
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Chinese (zh)
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张清双
李俊
陈其诚
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Fujian Huishang Technology Co ltd
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Datong Reciprocity Group Co ltd
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Priority to CN202110526441.5A priority Critical patent/CN113202944A/en
Publication of CN113202944A publication Critical patent/CN113202944A/en
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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
    • F16K5/06—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 spherical surfaces; Packings therefor
    • F16K5/0605—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 spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular 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
    • F16K5/06—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 spherical surfaces; Packings therefor
    • F16K5/0626—Easy mounting or dismounting means
    • F16K5/0636—Easy mounting or dismounting means the spherical plug being insertable from the top of the housing

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

Abstract

本发明涉及密封阀技术领域，尤其是一种深冷用方便在线维修的单阀座强制密封阀，包括驱动结构、阀杆、阀盖、球体、阀体以及阀座，所述驱动结构的输出轴与阀杆的上端之间相互连接，所述阀盖通过螺栓固定安装在阀体的上端，所述阀座固定安装在阀体的内侧下端，所述阀杆贯穿阀盖并延伸至阀体的内侧上端，所述球体与阀体上端之间设置有防泄漏结构。本发明采用偏心结构，阀门关闭过程中是渐进式接触，因而极大降低了传统超低温上装式球阀的球体和密封圈之间的摩擦力矩，同等条件下其操作扭矩更低，由于采用双偏心结构，同时也降低了密封圈的磨损，因而使球阀的使用寿命更长，尤其适用于频繁操作场合。

Figure 202110526441

The invention relates to the technical field of sealing valves, in particular to a single-valve-seat forced-sealing valve for cryogenic use that is convenient for online maintenance, comprising a driving structure, a valve stem, a valve cover, a ball, a valve body and a valve seat. The output of the driving structure The shaft and the upper end of the valve stem are connected to each other, the valve cover is fixedly installed on the upper end of the valve body by bolts, the valve seat is fixedly installed on the inner lower end of the valve body, and the valve stem penetrates the valve cover and extends to the valve body The inner upper end of the valve body is provided with an anti-leakage structure between the ball body and the upper end of the valve body. The invention adopts an eccentric structure, and the valve is in progressive contact during the closing process, thus greatly reducing the friction torque between the ball and the sealing ring of the traditional ultra-low temperature top-loading ball valve, and its operating torque is lower under the same conditions. Due to the double eccentric structure At the same time, it also reduces the wear of the sealing ring, thus making the service life of the ball valve longer, especially suitable for frequent operation occasions.

Figure 202110526441

Description

Cryogenic single-valve-seat forced sealing valve convenient for online maintenance
Technical Field
The invention relates to the technical field of sealing valves, in particular to a cryogenic single-valve-seat forced sealing valve convenient for online maintenance.
Background
In the structural design of the cryogenic valve, in addition to the general requirements of the valve structure, attention needs to be paid to the fact that after the cryogenic valve is closed, the low-temperature medium remained in the valve body absorbs a large amount of heat from the surrounding environment to be rapidly gasified, so that the problem of abnormal pressure rise is caused, the damage of the abnormal pressure rise is great, the valve can not work normally, the filler and the flange gasket can be damaged by flushing, even the valve is hard to explode, the conventional cryogenic upper-mounted ball valve for the LNG receiving station is provided with a valve seat at the upstream and the downstream respectively, and the cryogenic upper-mounted ball valve belongs to a double-valve seat structure, the abnormally raised pressure of the middle cavity is discharged to the upstream end through the area difference formed by the excircle of the sealing ring and the excircle of the piston seal, the downstream valve seat is a double-piston valve seat, the medium cavity pressure cannot be released to the downstream, the structure realizes release of the medium cavity pressure of the valve through area difference calculation theoretically, and uncertainty exists in practice.
Disclosure of Invention
The invention aims to solve the problem that in the prior art, the area difference formed by the excircle of a sealing ring and the excircle of a piston seal is used for discharging abnormally-raised pressure of a middle cavity to an upstream end, a downstream valve seat is a double-piston valve seat, the accumulated pressure of the middle cavity cannot be discharged to a downstream, the structure theoretically realizes the discharge of the pressure of the middle cavity of the valve through the area difference calculation, and the defect of uncertainty exists in practice.
In order to achieve the purpose, the invention adopts the following technical scheme:
the design is that a cryogenic single-valve-seat forced sealing valve convenient for online maintenance comprises a driving structure, a valve rod, a valve cover, a ball body, a valve body and a valve seat, wherein an output shaft of the driving structure is connected with the upper end of the valve rod, the valve cover is fixedly arranged at the upper end of the valve body through a bolt, the valve seat is fixedly arranged at the lower end of the inner side of the valve body, the valve rod penetrates through the valve cover and extends to the upper end of the inner side of the valve body, a vertical pin is fixedly arranged at the lower end of the valve rod, the vertical pin is matched with a pin groove formed in the upper end of the ball body, and a leakage-preventing structure is arranged between the ball body and the upper end of the valve body;
the anti-leakage structure comprises an axial flood plug, a valve seat adjuster, a screw and a radial flood plug, wherein the valve seat adjuster is in threaded connection with the valve body, the axial flood plug and the radial flood plug are fixedly installed on the valve seat adjuster through the screw respectively, and the valve seat adjuster is in mutual contact with one side of the outer surface of the ball body.
Preferably, the radial flooding plug and the axial flooding plug are arranged perpendicular to each other.
Preferably, a packing gland is fixedly mounted at the upper end of the valve cover and located on the outer side of the valve rod, packing is further arranged at the upper end of the outer side of the valve rod, and the packing is located at the upper end of the inner side of the valve cover.
Preferably, the upper end of the filler is in contact with the lower end surface of the valve cover.
Preferably, a sealing structure is arranged between the valve seat and the lower end of the ball body.
Preferably, the sealing structure comprises a locking steel wire and a sealing ring, and the sealing ring is fixedly installed between the lower end of the ball body and the upper end of the valve seat through the locking steel wire.
Preferably, a drip plate is horizontally arranged on the outer side of the valve cover and is annularly arranged.
Preferably, a gasket is fixedly arranged at the joint of the valve cover and the valve body, and the gasket is arranged in an annular shape.
The single-valve-seat forced sealing valve convenient for on-line maintenance for deep cooling has the beneficial effects that: according to the cryogenic single-valve-seat forced sealing valve convenient for online maintenance, due to the fact that a spring pre-tightening structure is avoided, a yielding space does not need to be generated on the valve seat during installation of the valve, a ball body can be conveniently installed from the upper portion of the valve body, and the valve is not required to be installed on the valve through a special tool. When the valve is in service, the valve does not need to be detached from a pipeline, the valve can be conveniently inspected and maintained, and the single valve seat does not have a middle cavity, so that the phenomenon of middle cavity overstock does not exist, potential risks caused by the overstock of the middle cavity are eliminated, potential risks of installation errors in the direction of the pressure relief end of the traditional ultralow-temperature top-mounted ball valve due to information asymmetry are also eliminated, an eccentric structure is adopted, progressive contact is performed in the closing process of the valve, friction torque between a ball body and a sealing ring of the traditional ultralow-temperature top-mounted ball valve is greatly reduced, the operating torque is lower under the same condition, and due to the adoption of the double-eccentric structure, the abrasion of the sealing ring is also reduced, so that the service life of the ball valve is longer, and the valve is particularly suitable for frequent operation occasions.
Drawings
Fig. 1 is a schematic structural diagram of a single-seat forced sealing valve for deep cooling, which is convenient for online maintenance.
Fig. 2 is an enlarged view of a portion a of the single seat positive sealing valve for deep cooling, which is convenient for on-line maintenance and is proposed in fig. 1.
Fig. 3 is an enlarged view of the structure of the part B of the single-seat positive sealing valve for deep cooling, which is convenient for online maintenance and is proposed in fig. 1.
Fig. 4 is an enlarged view of the eccentric structure of the ball of the single seat positive seal valve for deep cooling proposed in fig. 1, which is convenient for on-line maintenance.
In the figure: the device comprises a driving structure 1, a packing gland 2, packing 3, a drip plate 4, a valve rod 5, a valve cover 6, a gasket 7, an axial flooding plug 8, a valve seat adjuster 9, a screw 10, a radial flooding plug 11, a ball 12, a valve body 13, a locking steel wire 14, a sealing ring 15, a valve seat 16 and a vertical pin 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1-3, a cryogenic single-valve-seat forced sealing valve convenient for online maintenance comprises a driving structure 1, a valve rod 5, a valve cover 6, a ball body 12, a valve body 13 and a valve seat 16, wherein an output shaft of the driving structure 1 is connected with the upper end of the valve rod 5, a drip plate 4 is horizontally arranged on the outer side of the valve cover 6, the drip plate 4 is annularly arranged, the valve cover 6 is fixedly arranged at the upper end of the valve body 13 through bolts, the valve seat 16 is fixedly arranged at the lower end of the inner side of the valve body 13, the valve rod 5 penetrates through the valve cover 6 and extends to the upper end of the inner side of the valve body 13, a vertical pin 17 is fixedly arranged at the lower end of the valve rod 5, the vertical pin 17 is matched with a pin groove at the upper end of the ball body 12, the rotation of the ball body 12 is effectively realized, the vertical pin 17 is mutually matched with a pin groove arranged at the upper end of the ball body 12, a gasket 7 is fixedly arranged at the joint of the valve cover 6 and the valve body 13, and the gasket 7 is annularly arranged, the gasket 7 can reduce the extrusion force of the junction of the valve cover 6 and the valve body 13, and prevent the problem that the sealing performance is reduced due to the aggravation of the abrasion of the junction of the valve cover 6 and the valve body 13.
A leakage-proof structure is arranged between the ball body 12 and the upper end of the valve body 13; prevent leaking the structure and include that the axial floodplug 8, valve seat adjuster 9, screw 10 and radial floodplug 11, valve seat adjuster 9 threaded connection is on valve body 13, and axial floodplug 8 all passes through screw 10 fixed mounting on valve seat adjuster 9 with radial floodplug 11 respectively, and valve seat adjuster 9 and spheroid 12's surface one side contacts each other, and radial floodplug 11 and axial are floodplug mutually perpendicular setting between 8, and the theory of operation of this structure specifically is: a valve seat is arranged on the upstream side, and an axial flooding plug 8 and a radial flooding plug 11 are designed behind the valve seat 16 to prevent the leakage of the low-temperature medium from the space between the valve seat 16 and the valve body 13; a valve seat adjuster 9 with a threaded hole is arranged, and the valve seat adjuster 9 is connected with the valve body 13 through threads; a reserved bolt through hole is formed in the valve seat 16 and is connected with the valve seat adjuster 9 through a screw 10, when the screw 10 is tightened, the installation space of the axial flooding plug 8 and the radial flooding plug 11 reaches the designed reserved space size, and the axial flooding plug 8 and the radial flooding plug 11 form double sealing; meanwhile, the valve seat adjuster 9 is welded with the valve body 13, and the sealing reliability of the valve seat 16 and the valve body 13 is guaranteed.
A sealing structure is arranged between a valve seat 16 and the lower end of a ball 12, the sealing structure comprises a locking steel wire 14 and a sealing ring 15, the sealing ring 15 is fixedly arranged between the lower end of the ball 12 and the upper end of the valve seat 16 through the locking steel wire 14, the locking steel wire 14 realizes the fixation of the position of the sealing ring 15, the ball 12 is designed into an eccentric structure, referring to figure 2, the sealing specific pressure between the valve seat 16 and the ball 12 can be rapidly increased in the closing process of the valve, thereby ensuring the reliable sealing of a sealing pair, when the valve is opened, the valve seat 16 can be rapidly separated from the ball 12, the operating torque is effectively reduced, the ball 12 has relative friction with the sealing surface of the valve seat 16 only at the opening or closing moment, the problem that the friction is always generated between the sealing pair of the traditional ball valve is solved, by utilizing the eccentric principle, when the sealing surface is slightly worn, the wear amount of the sealing surface can be compensated by continuously rotating the ball 12, the valve can still be reliably sealed.
Example 2
Referring to fig. 1, the difference between the present embodiment and embodiment 1 is that a packing gland 2 is fixedly mounted at the upper end of a valve cap 6, the packing gland 2 is located at the outer side of a valve rod 5, a packing 3 is further disposed at the upper end of the outer side of the valve rod 5, the packing 3 is located at the upper end of the inner side of the valve cap 6, the upper end of the packing 3 is in contact with the lower end surface of the valve cap 6, the packing 3 fills the gap between the valve rod 5 and the driving structure 1 and the gap between the valve cap 6, and the sealing performance between the valve rod 5 and the valve cap 6 is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (8)

1.一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，包括驱动结构（1）、阀杆（5）、阀盖（6）、球体（12）、阀体（13）以及阀座（16），所述驱动结构（1）的输出轴与阀杆（5）的上端之间相互连接，所述阀盖（6）通过螺栓固定安装在阀体（13）的上端，所述阀座（16）固定安装在阀体（13）的内侧下端，所述阀杆（5）贯穿阀盖（6）并延伸至阀体（13）的内侧上端，所述阀杆（5）下端固定安装有竖向销（17），所述竖向销（17）与球体（12）上端设置的销槽相互匹配，所述球体（12）与阀体（13）上端之间设置有防泄漏结构；1. A single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance, characterized in that it comprises a drive structure (1), a valve stem (5), a valve cover (6), a sphere (12), a valve body (13) ) and a valve seat (16), the output shaft of the driving structure (1) is connected with the upper end of the valve stem (5), and the valve cover (6) is fixedly installed on the upper end of the valve body (13) by bolts , the valve seat (16) is fixedly installed on the inner lower end of the valve body (13), the valve stem (5) penetrates the valve cover (6) and extends to the inner upper end of the valve body (13), the valve stem ( 5) A vertical pin (17) is fixedly installed at the lower end, the vertical pin (17) is matched with the pin groove provided on the upper end of the sphere (12), and the sphere (12) is arranged between the upper end of the valve body (13) With anti-leakage structure; 所述防泄漏结构包括轴向泛塞（8）、阀座调整器（9）、螺钉（10）以及径向泛塞（11），所述阀座调整器（9）螺纹连接在阀体（13）上，所述轴向泛塞（8）与径向泛塞（11）分别均通过螺钉（10）固定安装在阀座调整器（9）上，所述阀座调整器（9）与球体（12）的外表面一侧相互接触。The leak-proof structure includes an axial flood plug (8), a valve seat adjuster (9), a screw (10) and a radial flood plug (11), and the valve seat adjuster (9) is threadedly connected to the valve body ( 13), the axial flood plug (8) and the radial flood plug (11) are respectively fixed on the valve seat adjuster (9) through screws (10), and the valve seat adjuster (9) is connected to the valve seat adjuster (9). The sides of the outer surfaces of the spheres (12) are in contact with each other. 2.根据权利要求1所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述径向泛塞（11）与轴向泛塞（8）之间相互垂直设置。2. The single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance according to claim 1, characterized in that the radial flood plug (11) and the axial flood plug (8) are perpendicular to each other set up. 3.根据权利要求1所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述阀盖（6）的上端固定安装有填料压盖（2），所述填料压盖（2）位于阀杆（5）的外侧，所述阀杆（5）的外侧上端还设置有填料（3），所述填料（3）位于阀盖（6）的内侧上端。3. The single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance according to claim 1, characterized in that a packing gland (2) is fixedly installed on the upper end of the valve cover (6), and the The packing gland (2) is located on the outer side of the valve stem (5), the outer upper end of the valve stem (5) is further provided with a packing (3), and the packing (3) is located at the inner upper end of the valve cover (6). 4.根据权利要求2所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述填料（3）的上端与阀盖（6）的下端面之间相互接触。4. The single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance according to claim 2, characterized in that the upper end of the packing (3) and the lower end surface of the valve cover (6) are in contact with each other . 5.根据权利要求1所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述阀座（16）与球体（12）的下端之间设置有密封结构。5 . The single-seat forced sealing valve for cryogenic use according to claim 1 , wherein a sealing structure is provided between the valve seat ( 16 ) and the lower end of the ball ( 12 ). 6 . 6.根据权利要求5所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述密封结构包括防松钢丝（14）以及密封圈（15），所述密封圈（15）通过防松钢丝（14）固定安装在球体（12）下端与阀座（16）上端之间。6. The single-seat forced sealing valve for cryogenic use that is convenient for online maintenance according to claim 5, characterized in that the sealing structure comprises an anti-loosening steel wire (14) and a sealing ring (15), the sealing The ring (15) is fixedly installed between the lower end of the ball (12) and the upper end of the valve seat (16) through the anti-loosening steel wire (14). 7.根据权利要求1所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述阀盖（6）的外侧水平安装有滴盘（4），所述滴盘（4）呈环形设置。7 . The single-seat forced-sealing valve for cryogenic use according to claim 1 , wherein a drip tray ( 4 ) is horizontally installed on the outside of the valve cover ( 6 ), and the drip tray ( 4 ) is installed horizontally on the outside of the valve cover ( 6 ). The disc (4) is arranged in a ring shape. 8.根据权利要求1所述的一种深冷用方便在线维修的单阀座强制密封阀，其特征在于，所述阀盖（6）与阀体（13）连接处位置固定安装有垫片（7），所述垫片（7）呈环形设置。8 . The single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance according to claim 1 , wherein a gasket is fixedly installed at the connection between the valve cover ( 6 ) and the valve body ( 13 ). 9 . (7), the gasket (7) is arranged in a ring shape.
CN202110526441.5A 2021-05-14 2021-05-14 Cryogenic single-valve-seat forced sealing valve convenient for online maintenance Pending CN113202944A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114352763A (en) * 2021-12-27 2022-04-15 浙江伯特利科技股份有限公司 Top-mounted cryogenic ball valve and online assembly device and assembly process thereof

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CN202733041U (en) * 2012-07-09 2013-02-13 张业宝 Ball valve seat
CN203131088U (en) * 2012-10-24 2013-08-14 张丽智 Compensating integral type ball valve
CN105333173A (en) * 2015-12-08 2016-02-17 天津百利展发集团有限公司 Valve seat structure of abrasion-resistant ball valve
CN205446860U (en) * 2016-01-26 2016-08-10 上海瑞控阀门有限公司 Ultra -low temperature upper assembling type welded ball valve
CN111828668A (en) * 2019-04-17 2020-10-27 成都成高阀门有限公司 High-performance valve seat sealing structure and orbital ball valve including the valve seat sealing structure
CN215673690U (en) * 2021-05-14 2022-01-28 大通互惠集团有限公司 A single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202733041U (en) * 2012-07-09 2013-02-13 张业宝 Ball valve seat
CN102748496A (en) * 2012-07-18 2012-10-24 嘉士凯（苏州）阀门配件有限公司 Fireproofing ball valve
CN203131088U (en) * 2012-10-24 2013-08-14 张丽智 Compensating integral type ball valve
CN105333173A (en) * 2015-12-08 2016-02-17 天津百利展发集团有限公司 Valve seat structure of abrasion-resistant ball valve
CN205446860U (en) * 2016-01-26 2016-08-10 上海瑞控阀门有限公司 Ultra -low temperature upper assembling type welded ball valve
CN111828668A (en) * 2019-04-17 2020-10-27 成都成高阀门有限公司 High-performance valve seat sealing structure and orbital ball valve including the valve seat sealing structure
CN215673690U (en) * 2021-05-14 2022-01-28 大通互惠集团有限公司 A single-seat forced-sealing valve for cryogenic use that is convenient for online maintenance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114352763A (en) * 2021-12-27 2022-04-15 浙江伯特利科技股份有限公司 Top-mounted cryogenic ball valve and online assembly device and assembly process thereof
CN114352763B (en) * 2021-12-27 2023-06-16 浙江伯特利科技股份有限公司 Top-mounted cryogenic ball valve, on-line assembly device and assembly process thereof

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