CN106523729A - Low-temperature top-assembling type fixed ball valve - Google Patents
Low-temperature top-assembling type fixed ball valve Download PDFInfo
- Publication number
- CN106523729A CN106523729A CN201510574080.6A CN201510574080A CN106523729A CN 106523729 A CN106523729 A CN 106523729A CN 201510574080 A CN201510574080 A CN 201510574080A CN 106523729 A CN106523729 A CN 106523729A
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- China
- Prior art keywords
- valve
- valve seat
- low temperature
- fixing ball
- ball valve
- 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.)
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Classifications
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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
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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
Abstract
The invention discloses a low-temperature top-assembling type fixed ball valve and belongs to the technical field of ball valves of liquefied natural gas pipelines. The low-temperature top-assembling type fixed ball valve comprises a valve body, a ball body, an upstream valve seat, a downstream valve seat, a valve cover, a valve rod, a connecting support and an actuator; an upper short shaft and a lower short shaft are arranged at the upper end and the lower end of the ball body correspondingly, the upper short shaft, the lower short shaft and the ball body are of an integrated structure, and the valve rod is connected with the upper short shaft; first elastic compensating components and spring seal rings are arranged between the upstream valve seat and the valve body and between the downstream valve seat and the valve body; the upstream valve seat is of a step-type structure and can move in the horizontal direction; and the downstream valve seat is of a step-type structure and can move in the horizontal direction. The low-temperature top-assembling type fixed ball valve is high in size accuracy, good in the sealing property, long in service life and capable of meeting the demand that the ball valve is used at the temperature of minus 162 DEG C. Even if a caliber reaches six inches or above, all properties of the low-temperature top-assembling type fixed ball valve can still meet the demand.
Description
Technical field
The present invention relates to LNG pipeline ball valve technical field, on more particularly to a kind of low temperature, dress formula is fixed
Ball valve.
Background technology
Liquefied natural gas (Liquefied Natural Gas, abbreviation LNG) is colourless, tasteless, nontoxic and without corruption
Corrosion, is the energy most clean on the generally acknowledged earth, and its main component is methane.Liquefied natural gas by
Gaseous natural gas are cooled to -162 DEG C under normal pressure to obtain.
It is the ball valve commonly used on the process pipelines such as natural gas liquefaction station, receiving station to fill formula fixing ball valve on low temperature,
For separating liquefied natural gas, when so-called upper-mounting type ball valve refers to assembling, the part such as valve seat, spheroid is by valve body
Portion loads valve body, is easy to the maintenance of fixing ball valve.Fill on existing low temperature in formula fixing ball valve, the one of valve rod
End is connected with spheroid by bonded, and the other end is connected with actuator through after valve gap, and actuator passes through
Valve rod drives spheroid to rotate the open and close so as to realize valve.By general plug sealing between valve seat and valve body
Circle is sealed.Due to liquefied natural gas vaporization temperature it is relatively low, when temperature be more than -162 DEG C when, liquefied natural gas
Volume can expand rapidly, cause valve pocket internal pressure drastically to raise, there is potential safety hazard.Therefore, low temperature
Pressure releasing structure is additionally provided with upper dress formula fixing ball valve, it is ensured that the safety of valve.At present, mainly pass through
General plug sealing ring between valve seat and valve body is released pressure.
To sum up, during the present invention is realized, the inventors discovered that at least there is following asking in prior art
Topic：Formula fixing ball valve is filled on existing low temperature releases using general plug sealing ring that to be easily caused general plug sealing ring close for pressure
Sealing property is deteriorated；Spheroid after being connected with valve rod overall line position tolerance it is difficult to ensure that, cause valve seat upstream and downstream to seal
Defective tightness of fitting with spheroid is enclosed, sealing leak is caused；Spheroid weight is all undertaken by upstream and downstream valve seat, is made
Upstream and downstream valve seat receives vertical force, is unfavorable for valve base sealing.
The content of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of good seal performance, easy to process, assembling
Low temperature on fill formula fixing ball valve.
Specifically, including following technical scheme：
Formula fixing ball valve is filled on a kind of low temperature, and filling formula fixing ball valve on the low temperature includes：Valve body, spheroid,
Upstream valve seat, downstream valve seat, valve gap, valve rod, connecting bracket and actuator；The spheroid is located at institute
State valve inner；The upstream valve seat and downstream valve seat are located between the spheroid and valve body and are located at described
Spheroid both sides, are provided with valve seat retainer ring between the upstream valve seat and downstream valve seat and the valve body；It is described
Connected by bolts and nuts between valve body and valve gap；The actuator be fixed in connecting bracket and with
The valve rod connection；Wherein, the upper and lower ends of the spheroid are respectively arranged with short axle and lower short axle, and institute
State short axle and lower short axle is structure as a whole with the spheroid, the valve rod is connected with the upper short axle；It is described
The general plug sealing of the first elastic compensating part, the first one-way sealing is additionally provided between upstream valve seat and the valve body
Circle and the general plug sealing ring of the second one-way sealing；First is additionally provided between the downstream valve seat and the valve body
Elastic compensating part and the general plug sealing ring of two way seal；The upstream valve seat is stepped construction and can be along water
Square to movement；The downstream valve seat is stepped construction and can move in the horizontal direction.
Further, be provided with stuffing-box in the valve gap, be provided with described filler letter pad bearing and
Packing ring；Described filler bearing is stepped construction；The 4th is provided between described filler bearing and the packing ring
The general plug sealing ring of one-way sealing.
Further, the 3rd elastic compensating part is provided between the lower short axle and the valve body.
Further, be provided with upper bearing (metal) between the upper short axle and the valve gap, the lower short axle with it is described
Lower bearing is provided between valve body.
Further, the upper bearing (metal) and lower bearing are included in stainless steel casing and polytrifluorochloroethylene
Lining.
Further, the first elastic compensating part is included to medium ring, isolation backing plate and disk spring.
Further, the upper short axle upper end is provided with flat groove or square hole, the valve rod lower end be provided with
The joint that the flat groove or square hole are engaged.
Further, it is close that the general plug of the 3rd one-way sealing is provided between the sealing surface of the valve body and the valve gap
Seal and spirotallic gasket.
Further, between the sealing surface of the upstream valve seat and the spheroid and the downstream valve seat and institute
Valve seat insert is provided between the sealing surface for stating spheroid.
Further, the series of the step of the upstream valve seat is 4～6 grades.
Further, the second elastic compensating part is provided between the nut and the valve gap.
Further, arrange at the position that the valve seat retainer ring is connected with the upstream valve seat, downstream valve seat
There is backplate.
Further, mudhole is provided with the valve body.
Further, described valve seat insert (13) bottom offers valve seat insert press-in exhaust air technique hole.
Preferably, the material of the valve seat insert is polytrifluorochloroethylene.
Preferably, the material of the valve body is CF8M (GB/T12230-2005), and phosphorus content suitably can reduce.
Preferably, described filler is graphite.
The beneficial effect of technical scheme provided in an embodiment of the present invention：
Fill in formula fixing ball valve on low temperature provided in an embodiment of the present invention, be respectively provided with the upper and lower ends of spheroid
Upper and lower short axle and adopt integrated structure design with spheroid, valve rod be solely subjected to moment of torsion and be not subject to spheroid to
The shearing force given.It is not only convenient for improving dimensional accuracy and avoiding traditional valve rod not only having undertaken moment of torsion but also having undertaken
After transmission failure that shearing force is easily caused and assembling, line position tolerance is poor.Upstream valve seat adopts stepped design, and
Space is provided between upstream valve seat and the sealing surface of valve body, when fixing ball valve lumen (i.e. valve body, valve gap with
And the space that formed of spheroid) pressure it is higher when, upstream valve seat can be moved towards valve body under the effect of the pressure,
So that forming space between upstream valve seat and spheroid, space of the pressure between upstream valve seat and spheroid is released,
On the one hand the safety of fixing ball valve is ensure that, on the other hand avoiding is caused by general plug sealing ring pressure of releasing
The problem that general plug sealing ring sealing property is reduced.Formula fixing ball valve chi is filled on low temperature provided in an embodiment of the present invention
Very little high precision, good seal performance, long service life disclosure satisfy that the requirement used at -162 DEG C.Work as valve
Bore when reaching more than 6 cun, the properties of fixing ball valve provided in an embodiment of the present invention remain able to full
Foot is required.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in embodiment description
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the structural representation for filling formula fixing ball valve on low temperature provided in an embodiment of the present invention；
Fig. 2 is the partial enlarged drawing at location A in Fig. 1；
Fig. 3 is the partial enlarged drawing at B location in Fig. 1；
Fig. 4 is the partial enlarged drawing at location of C in Fig. 1；
Fig. 5 is the partial enlarged drawing at D positions in Fig. 1；
Fig. 6 is the partial enlarged drawing at E positions in Fig. 1.
In figure, reference is represented respectively：
1st, valve body；2nd, the 3rd elastic compensating part；3rd, spheroid；
4th, lower bearing；5th, upper short axle；6th, lower short axle；
7th, the first elastic compensating part；701st, to medium ring；
702nd, disk spring；703rd, isolate backing plate；
8th, valve seat retainer ring；801st, backplate；
9th, the general plug sealing ring of the first one-way sealing；10th, the general plug sealing ring of the second one-way sealing；
11st, upstream valve seat；12nd, downstream valve seat；13rd, valve seat insert；
14th, the general plug sealing ring of the 3rd one-way sealing；15th, spirotallic gasket；
16th, the general plug sealing ring of two way seal；17th, the second elastic compensating part；
18th, upper bearing (metal)；19th, valve gap；20th, valve rod；21st, packing ring；
22nd, the general plug sealing ring of the 4th one-way sealing；23rd, pad bearing；
24th, filler；25th, connecting bracket；26th, actuator；27th, mudhole.
Specific embodiment
For making technical scheme and advantage clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the present invention is provided, referring to Fig. 1 and with reference to Fig. 2～Fig. 6,
Filling formula fixing ball valve on the low temperature includes：Valve body 1, spheroid 3, upstream valve seat 11, downstream valve seat 12, valve
Lid 19, valve rod 20, connecting bracket 25 and actuator 26；Spheroid 3 is located inside valve body 1；Upstream
Valve seat 11 and downstream valve seat 12 are located between spheroid 3 and valve body 1 and are located at 3 both sides of spheroid, upstream valve
Valve seat retainer ring 8 is provided between seat 11 and downstream valve seat 12 and valve body 1；Between valve body 1 and valve gap 19
Connected by bolts and nuts；Actuator 26 is fixed in connecting bracket 25 and is connected with valve rod 20；
Wherein, the upper and lower ends of spheroid 3 are respectively arranged with short axle 5 and lower short axle 6, and upper short axle 5 and lower short axle
6 are structure as a whole with spheroid 3, and valve rod 20 is connected with upper short axle 5；Between upstream valve seat 11 and valve body 1 also
It is provided with the general plug sealing ring 9 of the first elastic compensating part 7, the first one-way sealing and the general plug of the second one-way sealing
Sealing ring 10；The first elastic compensating part 7 and double is additionally provided between downstream valve seat 12 and the valve body 1
To sealing general plug sealing ring 16；Upstream valve seat 11 is stepped construction and can move in the horizontal direction；Downstream valve
Seat 12 is stepped construction and can move in the horizontal direction.
On low temperature provided in an embodiment of the present invention, the operation principle of dress formula fixing ball valve is：By the two ends of valve body 1
It is connected with liquefied natural gas process pipeline respectively, from the top of valve body 1 by upstream valve seat 11, integral structure
Spheroid 3 and the first elastic compensating part 7 and downstream valve seat 12 etc. load valve body 1, then using bolt
Valve gap 19 is connected with valve body 1 with nut, finally by the two ends of valve rod 20 respectively with upper short axle 5 with perform
Mechanism 26 connects.Wherein, upstream valve seat 11 is arranged on the side of circulation medium input, and downstream valve seat 12 is pacified
It is mounted in the side of circulation medium output；Using the first elastic compensating part 7 respectively by upstream valve seat 11, downstream
Valve seat 12 is compressed with spheroid 3, by the general plug sealing of the first one-way sealing between upstream valve seat 11 and valve body 1
The general plug sealing ring of the 9, second one-way sealing of circle 10 is sealed, by double between downstream valve seat 12 and valve body 1
Two way seal is carried out to general plug sealing ring 16 is sealed.By rotation driving mechanism 26, the rotation of spheroid 3 is driven
Realize the open and close of valve.Upstream valve seat 11, downstream valve seat 12 are designed using stepped construction, with
Leave space between valve body 1 and valve seat retainer ring 8, and as shown in Figure 2 and Figure 3,11 He of upstream valve seat
The axis of the installing hole on downstream valve seat 12 is horizontal direction, is fixed for fixing upstream and downstream valve seat and valve seat
The pin of ring 8 is also installed in the horizontal direction, and between pin and installing hole, gap coordinates.Therefore, the present invention is real
Apply formula fixing ball valve middle and upper reaches valve seat 11 is filled on the low temperature of example offer and downstream valve seat 12 can be in the horizontal direction
It is mobile.
Single stem design, spheroid 3 upper and lower two is adopted in filling formula fixing ball valve on the low temperature of the embodiment of the present invention
End is respectively provided with short axle 5 and lower short axle 6, and is structure as a whole, and is so conducive to spheroid 3 in valve body 1
Installation it is fixed and be conducive to the rotation of spheroid 3, valve rod 20 to be solely subjected to moment of torsion and be not subject to spheroid 3 and give
Shearing force.Upper short axle 5, spheroid 3 and lower short axle 6 are fabricated to into an entirety simultaneously, are advantageously ensured that
Dimensional accuracy.Particularly when valve aperture reaches more than 6 cun, if using it is traditional it is bonded by the way of
Connection spheroid 3 and valve rod 20, the form and position tolerance of the keyway on spheroid 3 and upper valve rod 20 are extremely difficult to require；
And the problems referred to above can be then prevented effectively from using the integrated structure design of the embodiment of the present invention.
Filling formula fixing ball valve on the low temperature of the embodiment of the present invention carries out pressure using staged valve seat pressure release mode and lets out
Put, when fixing ball valve lumen (the i.e. space formed by valve body 1, valve gap 19 and spheroid 3) pressure it is higher
When, upstream valve seat 11 can be moved towards valve body 1 under the effect of the pressure, so that upstream valve seat 11 and ball
Space is formed between body 3, and now space of the pressure just between upstream valve seat 11 and spheroid 3 is released；It is central
After cavity pressure recovers normal, upstream valve seat 11 and spheroid is made again in the presence of the first elastic compensating part 7
3 compress.Ensure fixing ball valve using it is safe while, it is to avoid by general plug sealing ring release pressure cause it is general
The problem that plug sealing ring sealing property is reduced.
To sum up, on low temperature provided in an embodiment of the present invention fill formula fixing ball valve dimensional accuracy height, good seal performance,
Long service life, disclosure satisfy that the requirement used at -162 DEG C.When the bore of valve reaches more than 6 cun,
Properties are remained able to meet and are required.
Fill on the above-mentioned low temperature in formula fixing ball valve, it is the general plug sealing ring 9 of the first one-way sealing, and second single
To general plug sealing ring 10 is sealed using conventional U-shaped general plug sealing ring, U-shaped opening direction should be with circulation
The flow direction of medium is parallel.The general plug sealing ring 9 of first one-way sealing and the general plug sealing of the second one-way sealing
The opening direction of circle 10 is contrary.The general plug sealing ring of two way seal 16 can be using double O-shaped general shown in Fig. 3
Plug sealing ring, will two O-shaped general plug sealing rings combine to form an entirety.
Fill on above-mentioned low temperature in formula fixing ball valve, as shown in figure 4, stuffing-box is provided with valve gap 19,
For loading filler 24.The bottom of stuffing-box is provided with pad bearing 23 and packing ring 21；Wherein, fill out
Material bearing 23 is stepped construction, and the one end being relatively large in diameter is upwards.Filler 24 is seated in pad bearing 23
Top, packing ring are arranged on the lower section of pad bearing 23, are provided with the 4th between pad bearing 23 and packing ring 21
The general plug sealing ring 22 of one-way sealing, to improve sealing property.The general plug sealing ring of 4th one-way sealing 22 can be adopted
With conventional U-shaped general plug sealing ring, its opening direction is straight down.The concrete composition of filler 24 is without strict
Limit, it is commonly used in the art for airtight and watertight padding, can for example be graphite.
Fill in formula fixing ball valve on above-mentioned low temperature, can arrange between 6 bottom of lower short axle and valve body 1
3rd elastic compensating part 2, to make up the error (as shown in Figure 5) of size.Especially for 6 cun of bore
For heavy caliber fixing ball valve above, the difficulty processed can be reduced.The tool of the 3rd elastic compensating part 2
Body form does not have strict restriction, for example, can be disk spring.
Fill in formula fixing ball valve, in order to reduce the abrasion of upper short axle 5 and lower short axle 6 on above-mentioned low temperature
And be conducive to transmission, can lower bearing 4 be set, in upper short axle 5 and valve between lower short axle 6 and valve body 1
Upper bearing (metal) 18 is set between lid 19.In order to meet -162 DEG C of low temperature use requirement and heavy caliber fixing ball valve
Dimension precision requirement, upper bearing (metal) 18 and lower bearing 4 can adopt austenitic stainless steel and polytrifluorochloroethylene
The shell of the combination bearing of (polychlorotrifluoroethylene, PCTFE), i.e. bearing be austenite not
Rust outer steel shell, arranges polytrifluorochloroethylene liner inside the housing.
Fill in formula fixing ball valve on above-mentioned low temperature, the first elastic compensating part 7 can adopt butterfly spring.
When using multiple disk springs, the problem inaccurate in order to prevent disk spring centering, can adopt with
Under mode：As shown in Fig. 2 the first elastic compensating part 7 include to medium ring 701, disk spring 702 with
And isolation backing plate 703.Wherein, isolate backing plate 703 to be located between two adjacent disk springs, to medium ring
701 for carrying out centering to multiple disk springs.It will be appreciated by persons skilled in the art that the first elasticity is mended
Repaying part 7 can also be using other form, as long as can be by upstream valve seat 11 and downstream valve seat with elasticity
12 are pressed on spheroid 3.
Fill on above-mentioned low temperature in formula fixing ball valve, valve rod 20 is no with the connected mode of upper short axle 5 strict
Restriction, as long as valve rod 20 can drive spheroid 3 to rotate realizes the open and close of valve.For example may be used
Flat groove or square hole is arranged in 5 upper end of upper short axle, arrange in 20 lower end of valve rod and match with flat groove or square hole
The joint of conjunction, so as to valve rod 20 is connected with upper short axle 5.
Fill in formula fixing ball valve on above-mentioned low temperature, as shown in figure 5, the sealing surface of valve body 1 and valve gap 19
Between adopt the general plug sealing ring 14 of the 3rd one-way sealing and 15 combination sealing form of spirotallic gasket to be sealed.
Wherein spirotallic gasket 15 can be SW with outside ring；The general plug sealing ring of 3rd one-way sealing 14 can adopt U
The general plug sealing ring of type, its opening direction are horizontally disposed.
Fill on the above-mentioned low temperature in formula fixing ball valve, between the sealing surface of upstream valve seat 11 and spheroid 3 and
Valve seat insert 13 is provided between the sealing surface of downstream valve seat 12 and spheroid 3.As the fixing ball valve needs
Used under -162 DEG C of low temperature environment for a long time, therefore the material of valve seat insert 13 should adopt lower temperature resistance
The good material of energy, for example, can be polytrifluorochloroethylene.It is close that 13 bottom of valve seat insert is further opened with valve seat
Seal press-in exhaust air technique hole.
Fill in formula fixing ball valve on above-mentioned low temperature, the series of the step of upstream valve seat 11 does not have strict limit
Fixed, those skilled in the art can be set according to actual needs, for example, can be 4 grades, 5 grades, 6 grades
Deng.The series of the step of downstream valve seat 12 does not have strict restriction yet, for example can for 2 grades, 3 grades, 4
Level etc..
Fill in formula fixing ball valve, due to the chi of valve gap 19 and valve body 1 in low temperature environment on above-mentioned low temperature
It is very little to produce certain contraction, so that nut loosening causes valve gap 19 and valve body 1 to connect insecure.In order to
Nut loosening is prevented, the second elastic compensating part 17 can be set between nut and valve body 1.Second is elastic
The concrete form of compensating unit 17 does not have strict restriction yet, for example, can be disk spring.
Fill on above-mentioned low temperature in formula fixing ball valve, jam, valve occur in order to prevent particulate matter from entering valve seat
Backplate 801 is provided with the position that seat retainer ring 8 is connected with upstream valve seat 11, downstream valve seat 12.
Fill on above-mentioned low temperature in formula fixing ball valve, for the ease of the cleaning inside valve body 1 and maintenance, can
To arrange mudhole 27 in the bottom of valve body 1.
Fill in formula fixing ball valve on above-mentioned low temperature, the concrete form embodiment of the present invention of actuator 26 is not
Make particular restriction, this area routine techniquess means can for example adopt Worm and worm-wheel gearing.
Fill on the above-mentioned low temperature in formula fixing ball valve, 1 material therefor of valve body should have good low temperature resistant
Performance, for example, can adopt CF8M rustless steels (GB/T12230-2005), phosphorus content suitably can reduce.
To sum up, formula fixing ball valve is filled on low temperature provided in an embodiment of the present invention fill the inspection of formula fixing ball valve on possessing
On the basis of repairing the characteristics of facilitating, also with good resistance to low temperature, sealing property and transmission capacity,
Disclosure satisfy that resistance to fixing ball valve low on the process pipelines such as liquefied natural gas industry natural gas liquefaction station, receiving station
Temperature, zero leakage and the requirement of long service life.
The above is for only for ease of those skilled in the art and understands technical scheme, and without
To limit the present invention.All any modifications within the spirit and principles in the present invention, made, equivalent,
Improve etc., should be included within the scope of the present invention.
Claims (13)
1. formula fixing ball valve is filled on a kind of low temperature, and filling formula fixing ball valve on the low temperature includes：Valve body (1),
Spheroid (3), upstream valve seat (11), downstream valve seat (12), valve gap (19), valve rod (20), connection
Frame (25) and actuator (26)；It is internal that described spheroid (3) are located at the valve body (1)；On described
Trip valve seat (11) and downstream valve seat (12) are located between the spheroid (3) and valve body (1) and are located at
Spheroid (3) both sides, upstream valve seat (11) and downstream valve seat (12) and the valve body (1)
Between be provided with valve seat retainer ring (8)；Pass through bolts and nuts between valve body (1) and valve gap (19)
Connection；Actuator (26) are fixed in connecting bracket (25) and are connected with the valve rod (20)
Connect；
Characterized in that,
The upper and lower ends of spheroid (3) are respectively arranged with short axle (5) and lower short axle (6), and described
Upper short axle (5) and lower short axle (6) are structure as a whole with the spheroid (3), valve rod (20) and institute
State short axle (5) connection；
Be additionally provided between upstream valve seat (11) and the valve body (1) the first elastic compensating part (7),
The general plug sealing ring of first one-way sealing (9) and the general plug sealing ring of the second one-way sealing (10)；
The first elastic compensating part (7) is additionally provided between downstream valve seat (12) and the valve body (1)
And the general plug sealing ring of two way seal (16)；
Described upstream valve seat (11) are stepped construction and can move in the horizontal direction；Downstream valve seat (12)
Can move for stepped construction and in the horizontal direction.
2. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that valve gap (19)
Stuffing-box is inside provided with, pad bearing (23) and packing ring (21) in described filler letter, is provided with；It is described to fill out
Material bearing (23) is stepped construction；The 4th is provided between described filler bearing (23) and the packing ring
The general plug sealing ring of one-way sealing (22).
3. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that the lower short axle
(6) the 3rd elastic compensating part (2) is provided between the valve body (1).
4. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that the upper short axle
(5) upper bearing (metal) (18), lower short axle (6) and the valve body is provided between the valve gap (19)
(1) lower bearing (4) is provided between.
5. formula fixing ball valve is filled on low temperature according to claim 4, it is characterised in that the upper bearing (metal)
And lower bearing (4) includes stainless steel casing and polytrifluorochloroethylene liner (18).
6. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that first bullet
Property compensating unit include to medium ring (701), disk spring (702) and isolation backing plate (703).
7. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that the upper short axle
(5) upper end is provided with flat groove or square hole, and valve rod (20) lower end is provided with and the flat groove or side
The joint that hole is engaged.
8. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that valve body (1)
The 3rd one-way sealing general plug sealing ring (14) is provided with and the sealing surface of the valve gap (19) between and is twined
Around pad (15).
9. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that the upstream valve
Between seat (11) and the sealing surface of the spheroid (3) and the downstream valve seat (12) and the spheroid (3)
Sealing surface between be provided with valve seat insert (13).
10. formula fixing ball valve is filled on low temperature according to claim 1, it is characterised in that the upstream
The series of the step of valve seat (11) is 4～6 grades.
Formula fixing ball valve is filled on 11. low temperature according to claim 1, it is characterised in that the nut
The second elastic compensating part (17) is provided between the valve gap (19).
Formula fixing ball valve is filled on 12. low temperature according to claim 1, it is characterised in that the valve seat
Backplate is provided with the position that retainer ring (8) is connected with the upstream valve seat (11), downstream valve seat (12)
(801)。
Formula fixing ball valve is filled on 13. low temperature according to claim 1, it is characterised in that the valve body
(1) mudhole (27) is provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510574080.6A CN106523729A (en) | 2015-09-10 | 2015-09-10 | Low-temperature top-assembling type fixed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510574080.6A CN106523729A (en) | 2015-09-10 | 2015-09-10 | Low-temperature top-assembling type fixed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106523729A true CN106523729A (en) | 2017-03-22 |
Family
ID=58346080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510574080.6A Pending CN106523729A (en) | 2015-09-10 | 2015-09-10 | Low-temperature top-assembling type fixed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106523729A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990016A (en) * | 2017-11-23 | 2018-05-04 | 浙江联大阀门有限公司 | A kind of novel top-mounted ball valve |
| CN108061173A (en) * | 2017-12-14 | 2018-05-22 | 超核阀门有限公司 | A kind of ultralow temperature Fixed ball valve |
| CN109296755A (en) * | 2018-11-12 | 2019-02-01 | 成都乘风阀门有限责任公司 | Angie type hyperbaric oxygen air valve |
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| CN202659955U (en) * | 2012-06-19 | 2013-01-09 | 苏州纽威阀门股份有限公司 | Top-mounted low-temperature fixed ball valve |
| CN202851630U (en) * | 2012-07-19 | 2013-04-03 | 日本精工株式会社 | Angular-contact ball bearing and liquefied gas pump device |
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| CN104089044A (en) * | 2014-07-15 | 2014-10-08 | 合肥通用机械研究院 | LNG ultra-low temperature top-mounting type ball valve seat capable of achieving pre-tightening force fine tuning and on-line disassembling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107990016A (en) * | 2017-11-23 | 2018-05-04 | 浙江联大阀门有限公司 | A kind of novel top-mounted ball valve |
| CN108061173A (en) * | 2017-12-14 | 2018-05-22 | 超核阀门有限公司 | A kind of ultralow temperature Fixed ball valve |
| CN109296755A (en) * | 2018-11-12 | 2019-02-01 | 成都乘风阀门有限责任公司 | Angie type hyperbaric oxygen air valve |
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Application publication date: 20170322 |