CN108331935B - Valve seat sealing structure and top-mounted low-temperature fixed ball valve with same - Google Patents
Valve seat sealing structure and top-mounted low-temperature fixed ball valve with same Download PDFInfo
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- CN108331935B CN108331935B CN201810289534.9A CN201810289534A CN108331935B CN 108331935 B CN108331935 B CN 108331935B CN 201810289534 A CN201810289534 A CN 201810289534A CN 108331935 B CN108331935 B CN 108331935B
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- 238000007789 sealing Methods 0.000 title claims abstract description 163
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000012423 maintenance Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910002804 graphite Inorganic materials 0.000 abstract description 7
- 239000010439 graphite Substances 0.000 abstract description 7
- 238000012856 packing Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 239000003949 liquefied natural gas Substances 0.000 description 12
- 238000003825 pressing Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- 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
- F16K5/0663—Packings
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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
- F16K5/08—Details
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a valve seat sealing structure and an upper-mounted low-temperature fixed ball valve provided with the same, and the valve seat sealing structure comprises a ball body, a valve body and a valve seat assembly, wherein the valve seat assembly comprises a sealing valve seat, a valve seat supporting ring, a threaded hole seat, a compression ring, a deformation sealing sheet, a spring seat and a spring; under the action of the spring, the sealing valve seat is in sealing fit with the ball body; the deformed sealing sheet and the valve seat supporting ring isolate the leakage passage between the valve body and the valve seat assembly under the compression of the positioning ring and the screw. The valve seat assembly is locked and sealed by a valve seat locking ring at the subsection. The invention eliminates the valve seat sealing structure and the graphite packing sealing structure of the Lipseal lip-shaped sealing ring with unstable performance, improves the stability and the reliability of the valve sealing and simultaneously reduces the manufacturing and processing difficulty; all sealing positions of the valve seat assembly can be manually adjusted to the sealing force; the upper-mounted low-temperature fixed ball valve can be maintained on line and is convenient to operate.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a valve seat sealing structure and an upper-mounted low-temperature fixed ball valve with the same.
Background
The energy consumption structure of China is mainly coal, with the improvement of environmental protection requirements, the proportion of clean energy in primary energy is greatly increased, especially in recent years in China, the demand for pipe natural gas and LNG liquefied natural gas is increased, and 'gas shortage' in winter forms a normal state and is difficult to improve in a short period. The LNG liquefied natural gas has the advantages of extremely high compression ratio (625: 1), convenience in transportation (shipping), easiness in peak regulation, lower cost than that of long-distance pipeline transportation of natural gas and the like, so with the increasing demand and development of domestic and international energy markets for the LNG liquefied natural gas, LNG liquefaction plants and receiving stations/storage banks are continuously enlarged and built, 329 LNG liquefaction plants are built and 174 LNG liquefaction plants are proposed in 2017, 69 receiving stations/storage banks are proposed and built, and the market of ultralow-temperature valves for LNG (-196 ℃) is wider. However, at present, the practical application of the-196 ℃ ultra-low temperature ball valve of the LNG project is almost all imported, the-196 ℃ ultra-low temperature ball valve for domestic LNG is started from nearly 10 years, but most of the existing ultra-low temperature fixed ball valves adopt Lipseal lip seal or graphite packing seal.
In the prior art, a Lipseal lip-shaped seal upper-mounted fixed ball valve seat structure is adopted, and the Lipseal structure has extremely high difficulty, extremely high requirements on surfaces, extremely high manufacturing difficulty and poor sealing stability and reliability. In the process of mounting and dismounting the Lipseal lip-shaped sealing ring of the upper-mounted fixed ball valve, a large back clearance cannot be avoided, the sealing surface of the Lipseal lip-shaped sealing ring is rubbed by a large stroke, the Lipseal lip-shaped sealing ring is easy to damage, the Lipseal lip-shaped sealing ring cannot be reused for many times, and the Lipseal lip-shaped sealing ring is extremely expensive.
For the valve seat sealing structure adopting graphite packing in the prior art, the graphite packing is formed by pressing, is not integral under microscopic observation, has loose tissue, is easy to fall scraps during installation and disassembly, and causes the internal leakage of the valve when being clamped on the sealing surface of the valve seat. In addition, since the graphite packing is compressed from the tail part by the compression ring, the valve can only be operated and locked in the channel, and the internal sealing element cannot be replaced if the valve is not taken down from the pipeline, so that the online maintenance function of the valve after being installed on the pipeline is lost.
Disclosure of Invention
The invention aims to provide a valve seat sealing structure and an upper-mounted low-temperature fixed ball valve provided with the same, which eliminates a Lipseal lip-shaped sealing ring with unstable performance and a valve seat sealing structure of graphite packing, and improves the stability and reliability of valve sealing.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the valve seat sealing structure comprises a ball body, a valve body and a valve seat assembly, wherein the ball body and the valve seat assembly are arranged in the ball body, the valve seat assembly comprises a sealing valve seat, a valve seat supporting ring, a threaded seat, a compression ring, a deformation sealing sheet, a spring seat and a spring, the valve seat supporting ring and the spring seat are arranged between the sealing valve seat and the valve body, the valve seat supporting ring is positioned between the sealing valve seat and the spring seat, and the spring is axially arranged between the spring seat and the valve body; under the action of the spring, the sealing valve seat is in sealing fit with the ball body;
the deformation gasket is annular, the other end of disk seat backup ring for sealed disk seat and the internal diameter end of deformation gasket are connected firmly, screw hole seat and clamp ring all suit are on the disk seat backup ring, and the clamp ring is located between screw hole seat and the deformation gasket, are equipped with the holding screw in the screw hole seat, and the holding screw top is on the clamp ring, under the effect of clamp ring, and deformation gasket and valve body seal cooperation.
Furthermore, a sealing ring is arranged on the sealing surface of the deformation sealing sheet and the valve body, and the sealing ring is arranged on the valve body.
Further, the other end of the valve seat supporting ring, which is opposite to the deformed sealing sheet, is provided with a flange, the flange is provided with a screw, the screw is in threaded connection with the screw hole seat, and a reserved gap is reserved between the flange and the screw hole seat.
Furthermore, the valve body is provided with an annular groove for installing a positioning ring, the positioning ring is installed in the annular groove, the screw hole seat is located between the positioning ring and the pressing ring, and the inner diameter of the positioning ring is smaller than the outer diameter of the screw hole seat.
Further, the valve seat assembly also comprises a valve seat locking ring for connecting the valve seat supporting ring and the sealing valve seat, and one end of the valve seat locking ring is in threaded connection with the outer circumferential surface of the valve seat supporting ring; the other end of the valve seat lock ring is sleeved on the sealing valve seat and matched with the spigot of the sealing valve seat.
Further, a valve seat sealing ring is arranged between the valve seat supporting ring and the sealing valve seat.
The deformed sealing sheet is welded with the valve seat supporting ring, or the deformed sealing sheet and the valve seat supporting ring are integrally manufactured.
Furthermore, inclined planes are arranged on the valve body, the spring seat, the compression ring and the valve seat supporting ring to form a space for the deformation of the deformable sealing sheet.
The spring seat is provided with a spring cavity, one end of the spring is arranged in the spring cavity, and the other end of the spring abuts against the valve body.
The upper-mounted low-temperature fixed ball valve comprises the valve seat sealing structure, and further comprises a valve rod and a valve cover, wherein the valve cover is fixedly connected with the top of the valve body, and the lower end of the valve rod is connected with the ball body.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention eliminates the valve seat sealing structure of the Lipseal lip-shaped sealing ring with unstable performance, the deformed sealing sheet and the valve seat supporting ring isolate a leakage passage for a medium to pass through between the valve body and the valve seat assembly under the compression of the positioning ring, the screw hole seat and the screw, and can adjust the sealing force on the deformed sealing sheet under the action of the screwing force of the adjusting screw, and meanwhile, a composite sealing structure of metal and the sealing ring is arranged between the deformed sealing sheet and the valve body, so that the sealing performance is improved;
2. the invention eliminates the graphite packing sealing structure with insufficient valve on-line maintenance function, improves the stability and the reliability of the valve sealing and reduces the manufacturing and processing difficulty;
3. all sealing positions of the valve seat assembly can realize manual adjustment of the sealing force through a special adjusting part, and the sealing tightness can be adjusted on line for multiple times; the extremely common hexagon socket spanner tool can be used for conveniently realizing online maintenance without using special tools;
4. when the upper-mounted low-temperature fixed ball valve is used for online maintenance and replacement of a sealing element, the ball body and the sealing valve seat can be taken out of the valve body together only by loosening the sealing valve seat and the valve seat supporting ring, and the operation is convenient.
Drawings
FIG. 1 is a schematic view of a valve seat seal structure when the valve seat seal structure is a metal seal;
FIG. 2 is a schematic view of the valve seat seal configuration when soft sealing;
FIG. 3 is a schematic structural diagram of a top-mounted low-temperature fixed ball valve;
FIG. 4 is a schematic diagram of the online maintenance of a top-loading cryogenic fixed ball valve;
FIG. 5 is a cross-sectional view of FIG. 4;
in the figure: 1-sphere, 2-sealing valve seat, 3-valve seat locking ring, 4-valve seat sealing ring, 5-valve seat supporting ring, 6-screw, 7-positioning ring, 8-screw seat, 9-tightening screw, 10-pressing ring, 11-deformed sealing sheet, 12-spring seat, 13-spring, 14-sealing ring, 15-valve body, 16-valve seat, 17-valve cover, 18-valve rod, 101-small retreating gap, 102-reserved gap, 104-free deformation space and 105-ball taking-out component.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the valve seat sealing structure disclosed by the invention comprises a ball 1, a valve body 15 and a valve seat assembly 16, wherein the ball 1 and the valve seat assembly 16 are arranged in the ball 1, the valve seat assembly 16 comprises a sealing valve seat 2, a valve seat supporting ring 5, a threaded seat 8, a compression ring 10, a deformed sealing sheet 11, a spring seat 12 and a spring 13, the valve seat supporting ring 5 and the spring seat 12 are arranged between the sealing valve seat 2 and the valve body 15, the valve seat supporting ring 5 is positioned between the sealing valve seat 2 and the spring seat 12, and the spring 13 is axially arranged between the spring seat 12 and the valve body 15; the sealing is realized by the joint of the spherical surface of the ball body 1 and the sealing surface of the sealing valve seat 2, the thrust of the sealing valve seat 2 jointed on the ball body 1 is provided by the spring 13 and is acted on the sealing surface by the spring seat 12, the valve seat supporting ring 5 and the sealing valve seat 2 in sequence. Wherein, there is a spring chamber on the spring holder 12, and spring 13 one end is adorned in the spring chamber, and the other end of spring 13 top is on valve body 15.
The deformed sealing sheet 11 is annular, the other end of the valve seat support ring 5 opposite to the sealing valve seat 2 is fixedly connected with the inner diameter end of the deformed sealing sheet 11, wherein the deformed sealing sheet 11 is welded with the valve seat support ring 5, or the deformed sealing sheet 11 and the valve seat support ring 5 are manufactured integrally. The screw hole seat 8 and the clamp ring 10 are all sleeved on the valve seat supporting ring 5, the clamp ring 10 is located between the screw hole seat 8 and the deformation sealing piece 11, a jacking screw 9 is installed in the screw hole seat 8, the jacking screw 9 jacks the clamp ring 10, and under the action of the clamp ring 10, the deformation sealing piece 11 is in sealing fit with the valve body 15. Sealing surface department of the sealing piece 11 and the valve body 15 that warp is equipped with sealing ring 14, and sealing ring 14 installs on valve body 15, and sealing ring 14 is located the sealing piece 11 outer end that warp. The valve seat assembly 16 and the valve body 8 are sealed by deforming the sealing sheet 11, and the valve body 15 and the sealing ring 14 are sealed in a combined manner.
The valve body 15 is provided with a ring groove for mounting the positioning ring 14, the positioning ring 14 is mounted in the ring groove, the screw hole seat 8 is positioned between the positioning ring 14 and the pressing ring 10, and the inner diameter of the positioning ring 14 is smaller than the outer diameter of the screw hole seat 8. The other end of the valve seat supporting ring 5, which is opposite to the deformed sealing sheet 11, is provided with a flange, a screw 6 is arranged on the flange, the screw 6 is in threaded connection with a screw hole seat 8, and a reserved gap 102 is arranged between the flange and the screw hole seat 8.
The seal on the segmented face of the valve seat assembly 16 is sealed in the locked condition by the valve seat locking ring 3. One end of the valve seat locking ring 3 is in threaded connection with the outer circumferential surface of the valve seat supporting ring 5; the other end of the valve seat locking ring 3 is sleeved on the sealing valve seat 2 and is matched with the spigot of the sealing valve seat 2. The inner circumferential surface of the valve seat locking ring 3 is simultaneously provided with a matching unthreaded hole and a positioning spigot which are matched with the sealing valve seat 2, and a matching thread which is matched with the valve seat supporting ring 5. And a step surface matched with the positioning spigot is arranged on the outer circumferential surface of the sealing valve seat 2. Meanwhile, a plurality of evenly distributed process holes are designed on the outer circular surface of the valve seat locking ring 3 and used for pulling, so that the valve seat 2 can be tightly pressed and sealed by the valve seat locking ring 3, and meanwhile, the valve seat supporting ring 5 is provided with hexagon socket head cap screws for preventing rotation.
The sealing between the valve seat 2 and the ball 1 can be hard sealing or soft sealing. As shown in figure 1, a metal hard seal is arranged between the sealing valve seat 2 and the ball body 1, and a valve seat sealing ring 4 is arranged between the valve seat supporting ring 5 and the sealing valve seat 2. As shown in fig. 2, a soft seal is formed between the sealing valve seat 2 and the ball 1.
The seat support ring 5 has a variation in axial position due to manufacturing errors of the respective components. When the position of the deformed sealing sheet is changed, the inner edge of the deformed sealing sheet 11 moves along with the valve seat supporting ring 5, the outer edge of the deformed sealing sheet 11 is pressed on the valve body 15 by the jacking screw 9 and the pressing ring 10, and the combined sealing structure formed by the valve body 15 and the sealing ring 14 realizes tight sealing. The deformed sealing sheet 11 can be automatically deformed while realizing sealing, and as shown in fig. 2, inclined surfaces are formed on the valve body 15, the spring seat 12, the compression ring 10 and the valve seat support ring 5 to form a space 104 for the deformed sealing sheet 11 to be freely deformed so as to adapt to the axial position change of the valve seat support ring.
The valve seat assembly 16 is an adjustable valve seat sealing structure: on one hand, the sealing force between the sealing valve seat 2 and the valve seat supporting ring 5 and the valve seat sealing ring 4 can be adjusted through the screwing force of the valve seat locking ring 3 with the screwing jack arranged on the outer circle; on the other hand, the strength of the composite seal between the deformed seal piece 11 and the valve body 15 and the seal ring 14 can also be adjusted by the strength of the tightening screw 9.
All sealing positions of the valve seat assembly can realize manual adjustment of the sealing force through a special adjusting part, and the sealing tightness can be adjusted on line for multiple times; the hexagonal socket spanner can be extremely common internal hexagonal spanner tools, and online maintenance can be conveniently realized without using special tools.
As shown in fig. 3, the upper-mounted low-temperature fixed ball valve is of an upper-mounted structure, and includes a valve rod 18 and a valve cover 17 in addition to the valve seat sealing structure, the valve cover 17 is fixedly connected with the top of the valve body 15, and the lower end of the valve rod 18 is connected with the ball body 1. As shown in fig. 4 and 5, when the assembled ultralow temperature fixed ball valve is maintained online, after the valve cover 17 and the valve rod 18 are removed, the valve seat locking ring 3 is unscrewed and separated from the valve seat support 5, and then the screw 6 is screwed by using a common tool of a wrench to tighten the valve seat support ring 5 on the screw hole seat 8, i.e. the reserved gap 102 is eliminated, the valve seat support ring 5 is moved to the right to make the small retreating gap 101, and the ball body taking-out assembly 105 can be taken out from the valve body together to realize online maintenance. When the device is installed, the operation sequence is reversed. The invention can be operated under the ultralow temperature working condition very stably, and can realize batch production with stable performance.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (8)
1. The valve seat sealing structure comprises a ball body (1), a valve body (15) and a valve seat assembly (16), wherein the ball body (1) and the valve seat assembly (16) are arranged in the valve body (15), and the valve seat sealing structure is characterized in that the valve seat assembly (16) comprises a sealing valve seat (2), a valve seat supporting ring (5), a threaded seat (8), a compression ring (10), a deformation sealing sheet (11), a spring seat (12) and a spring (13), the valve seat supporting ring (5) and the spring seat (12) are arranged between the sealing valve seat (2) and the valve body (15), the valve seat supporting ring (5) is positioned between the sealing valve seat (2) and the spring seat (12), and the spring (13) is axially arranged between the spring seat (12) and the valve body (15); under the action of the spring (13), the sealing valve seat (2) is in sealing fit with the ball body (1);
the deformable sealing piece (11) is annular, the other end of the valve seat supporting ring (5) opposite to the sealing valve seat (2) is fixedly connected with the inner diameter end of the deformable sealing piece (11), the threaded hole seat (8) and the compression ring (10) are sleeved on the valve seat supporting ring (5), the compression ring (10) is located between the threaded hole seat (8) and the deformable sealing piece (11), a jacking screw (9) is installed in the threaded hole seat (8), the jacking screw (9) is jacked on the compression ring (10), and the deformable sealing piece (11) is in sealing fit with the valve body (15) under the action of the compression ring (10);
a flange is arranged at the other end of the valve seat supporting ring (5) opposite to the deformed sealing sheet (11), a screw (6) is installed on the flange, the screw (6) is in threaded connection with the screw hole seat (8), and a reserved gap (102) is reserved between the flange and the screw hole seat (8);
when in maintenance, the screw (6) is screwed, and the valve seat supporting ring (5) is tensioned to the screw hole seat (8), namely the reserved gap (102) is eliminated;
a sealing surface of the deformable sealing sheet (11) and the valve body (15) is provided with a sealing ring (14), and the sealing ring (14) is arranged on the valve body (15).
2. The valve seat sealing structure according to claim 1, wherein: be equipped with the annular that is used for installing holding ring (7) on valve body (15), holding ring (7) are installed in the annular, and screw hole seat (8) are located between holding ring (7) and clamp ring (10), the internal diameter of holding ring (7) is less than the external diameter of screw hole seat (8).
3. The valve seat sealing structure according to claim 1, wherein: the valve seat assembly (16) further comprises a valve seat locking ring (3) used for connecting the valve seat supporting ring (5) with the sealing valve seat (2), and one end of the valve seat locking ring (3) is in threaded connection with the outer circumferential surface of the valve seat supporting ring (5); the other end of the valve seat locking ring (3) is sleeved on the sealing valve seat (2) and is matched with a spigot of the sealing valve seat (2).
4. The valve seat sealing structure according to claim 1, wherein: and a valve seat sealing ring (4) is arranged between the valve seat supporting ring (5) and the sealing valve seat (2).
5. The valve seat sealing structure according to claim 1, wherein: the deformed sealing sheet (11) is welded with the valve seat supporting ring (5), or the deformed sealing sheet (11) and the valve seat supporting ring (5) are manufactured integrally.
6. The valve seat sealing structure according to claim 1, wherein: and the valve body (15), the spring seat (12), the compression ring (10) and the valve seat supporting ring (5) are provided with a space (104) which is provided with an inclined surface to form free deformation of the deformable sealing sheet (11).
7. The valve seat sealing structure according to claim 1, wherein: the spring seat (12) is provided with a spring cavity, one end of the spring (13) is arranged in the spring cavity, and the other end of the spring (13) is propped against the valve body (15).
8. An upper-mounted type low-temperature fixed ball valve equipped with the valve seat sealing structure according to any one of claims 1 to 7, characterized in that: the ball valve further comprises a valve rod (18) and a valve cover (17), the valve cover (17) is fixedly connected with the top of the valve body (15), and the lower end of the valve rod (18) is connected with the ball body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810289534.9A CN108331935B (en) | 2018-04-03 | 2018-04-03 | Valve seat sealing structure and top-mounted low-temperature fixed ball valve with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810289534.9A CN108331935B (en) | 2018-04-03 | 2018-04-03 | Valve seat sealing structure and top-mounted low-temperature fixed ball valve with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108331935A CN108331935A (en) | 2018-07-27 |
| CN108331935B true CN108331935B (en) | 2020-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810289534.9A Active CN108331935B (en) | 2018-04-03 | 2018-04-03 | Valve seat sealing structure and top-mounted low-temperature fixed ball valve with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118482205A (en) * | 2024-06-26 | 2024-08-13 | 凯喜姆阀门有限公司 | Convenient online maintenance low temperature upper-mounted fixed ball valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201715015U (en) * | 2010-07-16 | 2011-01-19 | 凯特姆球阀制造(四川)有限公司 | Metal-seal fixed ball valve |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11344135A (en) * | 1998-06-02 | 1999-12-14 | Kitz Corp | Seal structure for ball valve |
| CN103801897B (en) * | 2013-12-26 | 2016-05-25 | 方正阀门集团有限公司 | On a kind of ultralow temperature, fill formula fixing ball valve and assembly method thereof |
| CN205001559U (en) * | 2015-07-20 | 2016-01-27 | 成都成高阀门有限公司 | Novel detachable top mounted ball valve seating structure |
| CN205908795U (en) * | 2016-06-12 | 2017-01-25 | 成都成高阀门有限公司 | Can dismantle valve seat seal structure reaches track ball valve including this seal structure |
| CN106151574A (en) * | 2016-08-19 | 2016-11-23 | 方正阀门集团有限公司 | Ultra-low temperature ball valve valve base sealing structure |
| CN107559449A (en) * | 2017-10-20 | 2018-01-09 | 上海阀门厂股份有限公司 | A kind of multi-state valve sealing structure |
| CN208457249U (en) * | 2018-04-03 | 2019-02-01 | 成都成高阀门有限公司 | Valve base sealing structure and the upper dress formula low temperature fixing ball valve for installing the sealing structure |
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2018
- 2018-04-03 CN CN201810289534.9A patent/CN108331935B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201715015U (en) * | 2010-07-16 | 2011-01-19 | 凯特姆球阀制造(四川)有限公司 | Metal-seal fixed ball valve |
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Address after: No. 67, Section 1, Xueshan Avenue, Dayi County, Chengdu City, Sichuan Province, 611330 Patentee after: Chengdu Chenggao Valve Co.,Ltd. Patentee after: CHENGDU CHENGFENG VALVE Co.,Ltd. Address before: 610000 Industrial Road, Jinyuan Town, Dayi County, Chengdu, Sichuan Patentee before: CHENGDU CHENG GAO VALVE Co.,Ltd. Patentee before: CHENGDU CHENGFENG VALVE Co.,Ltd. |
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