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 PDFInfo
- 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
- Authority
- CN
- China
- Prior art keywords
- valve
- seat
- sealing
- ball
- cryogenic
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 52
- 238000012423 maintenance Methods 0.000 title claims abstract description 20
- 238000012856 packing Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 210000004907 gland Anatomy 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000000750 progressive effect Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
Images
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
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, which 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 mutually 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, and a leakage-proof structure is arranged between the ball body and the upper end of the valve body. The invention adopts the eccentric structure, and the valve is in progressive contact in the closing process, so the friction torque between the ball body and the sealing ring of the traditional ultralow temperature top-mounted ball valve is greatly reduced, the operation torque is lower under the same condition, and the abrasion of the sealing ring is reduced due to the adoption of the double eccentric structure, so the service life of the ball valve is longer, and the invention is particularly suitable for frequent operation occasions.
Description
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. The cryogenic single-valve-seat forced sealing valve convenient for online maintenance is characterized by comprising 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), the valve cover (6) is fixedly installed at the upper end of the valve body (13) through bolts, the valve seat (16) is fixedly installed 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 installed at the lower end of the valve rod (5), the vertical pin (17) is matched with a pin groove formed in the upper end of the ball body (12), and a leakage-preventing structure is arranged between the ball body (12) and the upper end of the valve body (13);
the anti-leakage structure comprises an axial flooding plug (8), a valve seat adjuster (9), a screw (10) and a radial flooding plug (11), wherein the valve seat adjuster (9) is in threaded connection with a valve body (13), the axial flooding plug (8) and the radial flooding plug (11) are fixedly mounted on the valve seat adjuster (9) through the screw (10), and the valve seat adjuster (9) is in contact with one side of the outer surface of a ball body (12).
2. The single-seat positive sealing valve for cryogenic on-line maintenance convenience according to claim 1, characterized in that the radial plug (11) and the axial plug (8) are arranged perpendicular to each other.
3. The single-seat forced sealing valve for cryogenic on-line maintenance convenience is characterized in that a packing gland (2) is fixedly mounted at the upper end of the valve cover (6), the packing gland (2) is positioned at the outer side of the valve rod (5), packing (3) is further arranged at the upper end of the outer side of the valve rod (5), and the packing (3) is positioned at the upper end of the inner side of the valve cover (6).
4. The single-seat positive sealing valve for cryogenic on-line maintenance convenience according to claim 2, characterized in that the upper end of the packing (3) and the lower end face of the valve cover (6) are in contact with each other.
5. The single-seat positive sealing valve for cryogenic easy online maintenance according to claim 1, characterized in that a sealing structure is provided between the valve seat (16) and the lower end of the ball (12).
6. The single-seat positive sealing valve for cryogenic on-line maintenance convenience according to claim 5, characterized in that the sealing structure comprises a locking steel wire (14) and a sealing ring (15), and the sealing ring (15) is fixedly installed between the lower end of the ball (12) and the upper end of the valve seat (16) through the locking steel wire (14).
7. The single-seat forced sealing valve for cryogenic on-line maintenance is characterized in that a drip plate (4) is horizontally installed on the outer side of the valve cover (6), and the drip plate (4) is annularly arranged.
8. The single-seat forced sealing valve for cryogenic on-line maintenance is characterized in that a gasket (7) is fixedly installed at the joint of the valve cover (6) and the valve body (13), and the gasket (7) is arranged annularly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526441.5A CN113202944A (en) | 2021-05-14 | 2021-05-14 | Cryogenic single-valve-seat forced sealing valve convenient for online maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110526441.5A CN113202944A (en) | 2021-05-14 | 2021-05-14 | Cryogenic single-valve-seat forced sealing valve convenient for online maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113202944A true CN113202944A (en) | 2021-08-03 |
Family
ID=77031228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110526441.5A Pending CN113202944A (en) | 2021-05-14 | 2021-05-14 | Cryogenic single-valve-seat forced sealing valve convenient for online maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113202944A (en) |
Cited By (1)
| 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 |
-
2021
- 2021-05-14 CN CN202110526441.5A patent/CN113202944A/en active Pending
Cited By (2)
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111022695B (en) | High-temperature graphite sealing titanium alloy ball valve | |
| CN113202944A (en) | Cryogenic single-valve-seat forced sealing valve convenient for online maintenance | |
| CN215673690U (en) | Cryogenic single-valve-seat forced sealing valve convenient for online maintenance | |
| CN211474940U (en) | Spherical bidirectional high-performance rotary valve | |
| CN213117571U (en) | Hard sealing fixed ball valve | |
| CN212509581U (en) | High-temperature high-pressure stop valve based on labyrinth seal | |
| CN113653824A (en) | Scouring-resistant ball valve | |
| CN111623130A (en) | High-temperature and high-pressure stop valve based on labyrinth seal | |
| CN211649126U (en) | Welding ball valve that floats | |
| CN104633142A (en) | Four-eccentricity double-way sealing butterfly valve | |
| CN103603964A (en) | Online-maintainable butt-welding high-temperature high-pressure rapid cut-off steam ball valve | |
| CN210423769U (en) | Plug valve for high-voltage high-frequency secondary occasion | |
| CN111677895A (en) | Multi-bypass pressure relief type gate valve of high-pressure forge welding structure for nuclear power | |
| CN220870129U (en) | High wear-resisting lining ball valve | |
| CN217440831U (en) | LNG forced sealing switch ball valve | |
| CN219606095U (en) | Pressure seal rotary double-eccentric wear-resistant high-performance ball valve | |
| CN216742927U (en) | Flat valve sealing structure for oil extraction, gas production and fracturing well head | |
| CN217842767U (en) | Large-caliber petroleum pipeline ball valve | |
| CN212745135U (en) | Eccentric upper assembling type ball valve of ultra-low temperature high pressure C type | |
| CN218266582U (en) | Multi-sealing material ejection cylinder of screw press | |
| CN216519632U (en) | High-performance butterfly valve capable of compensating centering of butterfly plate | |
| CN215293670U (en) | Pressure self-tightening sealing upper-mounted ball valve | |
| CN215950437U (en) | Seamless non-rising stem gate valve | |
| CN211501718U (en) | LNG ultra-low temperature upper assembling type hard sealing ball valve seat | |
| CN217207859U (en) | Detachable rotary ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231213 Address after: 363900 No.1 Shunda Road, Gunong Farm, Changtai District, Zhangzhou City, Fujian Province Applicant after: Fujian Huishang Technology Co.,Ltd. Address before: 363900 Yintang Industrial Zone, Gu Nong farm, Changtai County, Zhangzhou City, Fujian Province Applicant before: DATONG RECIPROCITY GROUP CO.,LTD. |
|
| TA01 | Transfer of patent application right |