CN205026135U - Low temperature upper assembling type fixes ball valve - Google Patents

Low temperature upper assembling type fixes ball valve Download PDF

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Publication number
CN205026135U
CN205026135U CN201520699649.7U CN201520699649U CN205026135U CN 205026135 U CN205026135 U CN 205026135U CN 201520699649 U CN201520699649 U CN 201520699649U CN 205026135 U CN205026135 U CN 205026135U
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China
Prior art keywords
valve
low temperature
valve seat
ball valve
minor axis
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CN201520699649.7U
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Chinese (zh)
Inventor
张玉峰
魏奇
刘晓东
包彦平
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China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
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China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
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Abstract

The utility model discloses a low temperature upper assembling type fixes ball valve belongs to liquefied natural gas pipeline ball valve technical field. This low temperature upper assembling type fixes ball valve includes: valve body, spheroid, upper reaches disk seat, low reaches disk seat, valve gap, valve rod, linking bridge and actuating mechanism, both ends are provided with minor axis and lower minor axis respectively about spheroidal, and go up minor axis and lower minor axis and spheroid structure as an organic whole, and the valve rod is connected with last minor axis, be provided with first elasticity compensating unit and general stopper sealing washer between upper reaches disk seat, low reaches disk seat and the valve body, upper reaches disk seat is for stepped structure and can follow the horizontal direction removal, the low reaches disk seat is for stepped structure and can follow the horizontal direction removal. This low temperature upper assembling type fixes ball valve size precision is high, sealing performance is good, and long service life can satisfy the requirement of using under - 162 DEG C. Even the bore reaches more than 6 cun, each item performance of this low temperature upper assembling type fixes ball valve still can meet the demands.

Description

A kind of low temperature fills formula fixing ball valve
Technical field
The utility model relates to LNG pipeline ball valve technical field, particularly a kind of low temperature fills formula fixing ball valve.
Background technique
Colourless, tasteless, the nontoxic and non-corrosiveness of LNG Liquefied natural gas (LiquefiedNaturalGas, be called for short LNG), be the energy the cleanest on the generally acknowledged earth, its main component is methane.LNG Liquefied natural gas obtains by ambient pressure gaseous natural gas being cooled to-162 DEG C.
Low temperature filling formula fixing ball valve is ball valve conventional on the process pipelines such as natural gas liquefaction station, receiving station, for cutting off LNG Liquefied natural gas, when so-called upper-mounting type ball valve refers to assembling, the parts such as valve seat, spheroid load valve body by valve body top, are convenient to the maintenance of fixing ball valve.Existing low temperature fills in formula fixing ball valve, one end of valve rod is connected by key and is connected with spheroid, and the other end is connected with actuator through after valve gap, and actuator drives spheroid to rotate by valve rod thus realizes the open and close of valve.Sealed by general plug sealing ring between valve seat and valve body.Because liquefied natural gas vaporization temperature is lower, when temperature is greater than-162 DEG C, the volume meeting undergoes rapid expansion of LNG Liquefied natural gas, causes valve pocket internal pressure sharply to raise, there is potential safety hazard.Therefore, low temperature fills in formula fixing ball valve and be also provided with pressure releasing structure, ensure the safety of valve.At present, mainly through the general plug sealing ring relieving pressure between valve seat and valve body.
To sum up, realizing in process of the present utility model, the design people finds at least there is following problem in prior art: existing low temperature fills formula fixing ball valve and utilize general plug sealing ring relieving pressure easily to cause general plug sealing ring sealability to be deteriorated; After spheroid is connected with valve rod, overall line position tolerance is difficult to ensure, causes valve seat upstream and downstream seal ring and spheroid to fit defective tightness, causes seal leakage; Spheroid weight is all born by upstream and downstream valve seat, makes upstream and downstream valve seat by vertical force, is unfavorable for valve base sealing.
Model utility content
In order to solve above-mentioned technical problem, the utility model provides a kind of good seal performance, be easy to process, the low temperature of assembling fills formula fixing ball valve.
Specifically, following technological scheme is comprised:
A kind of low temperature fills formula fixing ball valve, described low temperature fills formula fixing ball valve and comprise: valve body, spheroid, upstream valve seat, downstream valve seat, valve gap, valve rod, connection bracket and actuator; Described spheroid is positioned at described valve inner; Described upstream valve seat and downstream valve seat to be positioned between described spheroid and valve body and to be positioned at described spheroid both sides, described upstream valve seat and be provided with valve seat retaining ring between downstream valve seat and described valve body; Described valve body is connected by bolts and nuts with between valve gap; Described actuator to be fixed in connection bracket and to be connected with described valve rod; Wherein, the two ends up and down of described spheroid are respectively arranged with minor axis and lower minor axis, and described upper minor axis and lower minor axis and described spheroid are structure as a whole, and described valve rod is connected with described upper minor axis; The first elastic compensating parts, the general plug sealing ring of the first one-way sealing and the general plug sealing ring of the second one-way sealing is also provided with between described upstream valve seat and described valve body; The first elastic compensating parts and the general plug sealing ring of two way sealed is also provided with between described downstream valve seat and described valve body; Described upstream valve seat is stepped construction and can moves in the horizontal direction; Described downstream valve seat is stepped construction and can moves in the horizontal direction.
Further, in described valve gap, be provided with stuffing box, in described stuffing box, be provided with pad bearing and packing ring; Described pad bearing is stepped construction; The general plug sealing ring of the 4th one-way sealing is provided with between described pad bearing and described packing ring.
Further, the 3rd elastic compensating parts are provided with between described lower minor axis and described valve body.
Further, between described upper minor axis and described valve gap, be provided with upper bearing (metal), between described lower minor axis and described valve body, be provided with lower bearing.
Further, described upper bearing (metal) and lower bearing include stainless steel casing and polychlorotrifluoroethylene liner.
Further, described first elastic compensating parts comprise centering ring, isolation backing plate and belleville spring.
Further, described upper minor axis upper end is provided with flat groove or square hole, and described valve rod lower end is provided with the joint matched with described flat groove or square hole.
Further, the general plug sealing ring of the 3rd one-way sealing and spirotallic gasket is provided with between the sealing surface of described valve body and described valve gap.
Further, valve seat insert is provided with between the sealing surface of described upstream valve seat and described spheroid and between the sealing surface of described downstream valve seat and described spheroid.
Further, the progression of the step of described upstream valve seat is 4 ~ 6 grades.
Further, the second elastic compensating parts are provided with between described nut and described valve gap.
Further, the position that described valve seat retaining ring is connected with described upstream valve seat, downstream valve seat is provided with backplate.
Further, described valve body is provided with pollutant exhaust hole.
Further, described valve seat insert (13) bottom offers valve seat insert press-in exhaust air technique hole.
Preferably, the material of described valve seat insert is polychlorotrifluoroethylene.
Preferably, the material of described valve body is CF8M (GB/T12230-2005), and carbon content can suitably reduce.
Preferably, described filler is graphite.
The beneficial effect of the technological scheme that the utility model embodiment provides:
The low temperature that the utility model embodiment provides fills in formula fixing ball valve, arrange upper and lower minor axis respectively and adopt integrated structure design with spheroid at the two ends up and down of spheroid, valve rod only bears moment of torsion and does not bear the shearing force that spheroid gives.Not only be convenient to improve dimensional accuracy and avoid traditional valve rod not only born moment of torsion but also born transmission failure and assembling that shearing force easily causes after line position tolerance poor.Upstream valve seat adopts stepped design, and be provided with space between upstream valve seat and the sealing surface of valve body, when fixing ball valve lumen (i.e. valve body, valve gap and spheroid are formed space) pressure is higher, upstream valve seat can move towards valve body under the effect of the pressure, thus make to form space between upstream valve seat and spheroid, pressure is released from the space between upstream valve seat and spheroid, ensure that the safety of fixing ball valve on the one hand, avoid the problem causing general plug sealing ring sealability to reduce by general plug sealing ring relieving pressure on the other hand.The low temperature that the utility model embodiment provides fills formula fixing ball valve dimensional accuracy is high, good seal performance, long service life, the requirement used at-162 DEG C can be met.When the bore of valve reaches more than 6 cun, the properties of the fixing ball valve that the utility model embodiment provides still can meet the demands.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The low temperature that Fig. 1 provides for the utility model embodiment fills the structural representation of formula fixing ball valve;
Fig. 2 is the partial enlarged drawing of A position in Fig. 1;
Fig. 3 is the partial enlarged drawing of B position in Fig. 1;
Fig. 4 is the partial enlarged drawing of C position in Fig. 1;
Fig. 5 is the partial enlarged drawing of D position in Fig. 1;
Fig. 6 is the partial enlarged drawing of E position in Fig. 1.
In figure, reference character represents respectively:
1, valve body; 2, the 3rd elastic compensating parts; 3, spheroid;
4, lower bearing; 5, upper minor axis; 6, lower minor axis;
7, the first elastic compensating parts; 701, centering ring;
702, belleville spring; 703, backing plate is isolated;
8, valve seat retaining ring; 801, backplate;
9, the general plug sealing ring of the first one-way sealing; 10, the general plug sealing ring of the second one-way sealing;
11, upstream valve seat; 12, downstream valve seat; 13, valve seat insert;
14, the general plug sealing ring of the 3rd one-way sealing; 15, spirotallic gasket;
16, the general plug sealing ring of two way sealed; 17, the second elastic compensating parts;
18, upper bearing (metal); 19, valve gap; 20, valve rod; 21, packing ring;
22, the general plug sealing ring of the 4th one-way sealing; 23, pad bearing;
24, filler; 25, connection bracket; 26, actuator; 27, pollutant exhaust hole.
Embodiment
For making the technical solution of the utility model and advantage clearly, below in conjunction with accompanying drawing, the utility model mode of execution is described in further detail.
The utility model embodiment provides on a kind of low temperature and fills formula fixing ball valve, see Fig. 1 and composition graphs 2 ~ Fig. 6, this low temperature fills formula fixing ball valve and comprise: valve body 1, spheroid 3, upstream valve seat 11, downstream valve seat 12, valve gap 19, valve rod 20, connection bracket 25 and actuator 26; It is inner that spheroid 3 is positioned at valve body 1; Upstream valve seat 11 and downstream valve seat 12 are between spheroid 3 and valve body 1 and be positioned at spheroid 3 both sides, upstream valve seat 11 and be provided with valve seat retaining ring 8 between downstream valve seat 12 and valve body 1; Be connected by bolts and nuts between valve body 1 with valve gap 19; Actuator 26 to be fixed in connection bracket 25 and to be connected with valve rod 20; Wherein, the two ends up and down of spheroid 3 are respectively arranged with minor axis 5 and lower minor axis 6, and upper minor axis 5 and lower minor axis 6 are structure as a whole with spheroid 3, and valve rod 20 is connected with upper minor axis 5; The general plug sealing ring of the first elastic compensating parts 7, first one-way sealing 9 and the general plug sealing ring 10 of the second one-way sealing is also provided with between upstream valve seat 11 and valve body 1; The first elastic compensating parts 7 and the general plug sealing ring 16 of two way sealed is also provided with between downstream valve seat 12 and described valve body 1; Upstream valve seat 11 is stepped construction and can moves in the horizontal direction; Downstream valve seat 12 is stepped construction and can moves in the horizontal direction.
The working principle low temperature that the utility model embodiment provides filling formula fixing ball valve is: be connected with liquefied natural gas process pipeline respectively at the two ends of valve body 1, from the top of valve body 1, the spheroid 3 of upstream valve seat 11, integral structure and the first elastic compensating parts 7 and downstream valve seat 12 etc. are loaded valve body 1, then utilize screw bolt and nut to be connected with valve body 1 by valve gap 19, finally the two ends of valve rod 20 are connected with actuator 26 with upper minor axis 5 respectively.Wherein, upstream valve seat 11 is arranged on the side of circulation medium input, and downstream valve seat 12 is arranged on the side that circulation medium exports; The first elastic compensating parts 7 are utilized upstream valve seat 11, downstream valve seat 12 to be compressed with spheroid 3 respectively, sealed by the general plug sealing ring 10 of the first one-way sealing general plug sealing ring 9, second one-way sealing between upstream valve seat 11 and valve body 1, between downstream valve seat 12 and valve body 1, carry out two way sealed by the general plug sealing ring 16 of two way sealed.By rotation driving mechanism 26, spheroid 3 is driven to rotate the open and close realizing valve.Upstream valve seat 11, downstream valve seat 12 all adopt stepped construction to design, and leave space between valve body 1 and valve seat retaining ring 8, and as shown in Figure 2 and Figure 3, the axis of the mounting hole on upstream valve seat 11 and downstream valve seat 12 is substantially horizontal, pin for fixing upstream and downstream valve seat and valve seat retaining ring 8 is also installed in the horizontal direction, Spielpassung between pin and mounting hole.Therefore, the low temperature that the utility model embodiment provides fills formula fixing ball valve middle and upper reaches valve seat 11 and downstream valve seat 12 can move in the horizontal direction.
The low temperature of the utility model embodiment fills in formula fixing ball valve and adopt single stem design, spheroid 3 upper/lower terminal arranges minor axis 5 and lower minor axis 6 respectively, and be structure as a whole, be conducive to the installation of spheroid 3 in valve body 1 like this fix and be conducive to the rotation of spheroid 3, valve rod 20 only bears moment of torsion and does not bear the shearing force that spheroid 3 gives.Upper minor axis 5, spheroid 3 and lower minor axis 6 are manufactured as a whole simultaneously, be conducive to ensureing dimensional accuracy.Particularly when valve aperture reaches more than 6 cun, if the mode adopting traditional key to connect connects spheroid 3 and valve rod 20, the form and position tolerance of the keyway on spheroid 3 and upper valve rod 20 is difficult to reach requirement; Adopt the integrated structure design of the utility model embodiment then effectively can avoid the problems referred to above.
The low temperature of the utility model embodiment filling formula fixing ball valve adopts cascade valve seat pressure release mode to carry out pressure releasing, when fixing ball valve lumen (i.e. valve body 1, valve gap 19 and spheroid 3 are formed space) pressure is higher, upstream valve seat 11 can move towards valve body 1 under the effect of the pressure, thus make to form space between upstream valve seat 11 and spheroid 3, now pressure is just released from the space between upstream valve seat 11 and spheroid 3; Central cavity pressure recovers normally, again makes upstream valve seat 11 and spheroid 3 compress under the effect of the first elastic compensating parts 7.While guarantee fixing ball valve use safety, avoid the problem causing general plug sealing ring sealability to reduce by general plug sealing ring relieving pressure.
To sum up, the low temperature that the utility model embodiment provides fills formula fixing ball valve dimensional accuracy is high, good seal performance, long service life, the requirement used at-162 DEG C can be met.When the bore of valve reaches more than 6 cun, properties still can meet the demands.
Above-mentioned low temperature fills in formula fixing ball valve, the general plug sealing ring of the first one-way sealing 9 and the second one-way sealing general plug sealing ring 10 adopt conventional U-shaped general plug sealing ring, and U-shaped opening direction should be parallel with the flow direction of circulation medium.The opening direction of the general plug sealing ring of the first one-way sealing 9 and the general plug sealing ring of the second one-way sealing 10 is contrary.The general plug sealing ring of two way sealed 16 can adopt the general plug sealing ring of two O types shown in Fig. 3, is combined to form an entirety by two general plug sealing rings of O type.
Above-mentioned low temperature fills in formula fixing ball valve, as shown in Figure 4, in valve gap 19, be provided with stuffing box, for loading filler 24.Pad bearing 23 and packing ring 21 is provided with in the bottom of stuffing box; Wherein, pad bearing 23 is stepped construction, and the larger one end of diameter upwards.Filler 24 is seated in the top of pad bearing 23, and packing ring is arranged on the below of pad bearing 23, is provided with the general plug sealing ring 22 of the 4th one-way sealing, to improve sealability between pad bearing 23 and packing ring 21.The general plug sealing ring of 4th one-way sealing 22 can adopt conventional U-shaped general plug sealing ring, and its opening direction straight down.The concrete composition of filler 24 does not have considered critical, related domain conventional for airtight and watertight padding, can be such as graphite.
Above-mentioned low temperature fills in formula fixing ball valve, the 3rd elastic compensating parts 2 can be set bottom lower minor axis 6 and between valve body 1, to make up the error (as shown in Figure 5) of size.Particularly for the heavy caliber fixing ball valve of bore more than 6 cun, the difficulty of processing can be reduced.The concrete form of the 3rd elastic compensating parts 2 does not have strict restriction, such as, can be belleville spring.
Above-mentioned low temperature fills in formula fixing ball valve, in order to reduce the wearing and tearing of upper minor axis 5 and lower minor axis 6 and be conducive to transmission, lower bearing 4 can be set between lower minor axis 6 and valve body 1, upper bearing (metal) 18 is set between upper minor axis 5 and valve gap 19.In order to meet the low temperature usage requirement of-162 DEG C and the dimension precision requirement of heavy caliber fixing ball valve, upper bearing (metal) 18 and lower bearing 4 can adopt Austenitic Stainless Steel and polychlorotrifluoroethylene (polychlorotrifluoroethylene, PCTFE) combination bearing, namely the shell of bearing is austenite stainless outer steel shell, and portion arranges polychlorotrifluoroethylene liner in the enclosure.
Above-mentioned low temperature fills in formula fixing ball valve, the first elastic compensating parts 7 can adopt butterfly spring.When adopting multiple belleville spring, in order to prevent the inaccurate problem of belleville spring centering, can adopt following mode: as shown in Figure 2, the first elastic compensating parts 7 comprise centering ring 701, belleville spring 702 and isolation backing plate 703.Wherein, isolation backing plate 703 is between adjacent two belleville springs, and centering ring 701 is for carrying out centering to multiple belleville spring.It will be appreciated by persons skilled in the art that the first elastic compensating parts 7 can also adopt other form, upstream valve seat 11 and downstream valve seat 12 can be pressed on spheroid 3 as long as have elasticity.
Above-mentioned low temperature fills in formula fixing ball valve, valve rod 20 does not have strict restriction with the Placement of upper minor axis 5, as long as valve rod 20 can drive spheroid 3 to rotate the open and close realizing valve.Such as flat groove or square hole can be set in upper minor axis 5 upper end, the joint matched be set in valve rod 20 lower end, thus valve rod 20 is connected with upper minor axis 5 with flat groove or square hole.
Above-mentioned low temperature fills in formula fixing ball valve, as shown in Figure 5, between the sealing surface of valve body 1 and valve gap 19, adopt the general plug sealing ring 14 of the 3rd one-way sealing and spirotallic gasket 15 combination seal form to seal.Wherein spirotallic gasket 15 can be spiral wound gasket; The general plug sealing ring of 3rd one-way sealing 14 can adopt U-shaped general plug sealing ring, and its opening direction is arranged in the horizontal direction.
Above-mentioned low temperature fills in formula fixing ball valve, between the sealing surface of upstream valve seat 11 and spheroid 3 and between the sealing surface of downstream valve seat 12 and spheroid 3, be provided with valve seat insert 13.Because this fixing ball valve needs to use for a long time under the low temperature environment of-162 DEG C, therefore the material of valve seat insert 13 should adopt the material that resistance to low temperature is good, such as, can be polychlorotrifluoroethylene.Valve seat insert press-in exhaust air technique hole is also offered bottom valve seat insert 13.
Above-mentioned low temperature fills in formula fixing ball valve, the progression of the step of upstream valve seat 11 does not have strict restriction, and those skilled in the art can set according to actual needs, such as, can be 4 grades, 5 grades, 6 grades etc.The progression of the step of downstream valve seat 12 does not have strict restriction yet, such as, can be 2 grades, 3 grades, 4 grades etc.
Above-mentioned low temperature fills in formula fixing ball valve, because the size of valve gap 19 and valve body 1 can produce certain contraction in low temperature environment, thus make nut loosening cause valve gap 19 to be connected insecure with valve body 1.In order to prevent nut loosening, can the second elastic compensating parts 17 be set between nut and valve body 1.The concrete form of the second elastic compensating parts 17 does not have strict restriction yet, such as, can be belleville spring.
Above-mentioned low temperature fills in formula fixing ball valve, in order to prevent particulate matter from entering valve seat generation jam, the position that valve seat retaining ring 8 is connected with upstream valve seat 11, downstream valve seat 12 is provided with backplate 801.
Above-mentioned low temperature fills in formula fixing ball valve, for the ease of the clean of valve body 1 inside and maintenance, pollutant exhaust hole 27 can be set in the bottom of valve body 1.
Above-mentioned low temperature fills in formula fixing ball valve, concrete form the utility model embodiment of actuator 26 does not do special restriction, and related domain routine techniques means, such as, can adopt Worm and worm-wheel gearing.
Above-mentioned low temperature fills in formula fixing ball valve, valve body 1 material therefor should have good resistance to low temperature, and such as can adopt CF8M stainless steel (GB/T12230-2005), carbon content can suitably reduce.
To sum up, the low temperature that the utility model embodiment provides fills formula fixing ball valve on possessing, to fill formula fixing ball valve overhaul on the basis of feature easily, also there is good resistance to low temperature, sealability and transmission capacity, the requirement of low temperature resistant to fixing ball valve on the process pipelines such as LNG Liquefied natural gas industry natural gas liquefaction station, receiving station, zero leakage and long service life can be met.
The above is only understand the technical solution of the utility model for the ease of those skilled in the art, not in order to limit the utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (13)

1. low temperature fills a formula fixing ball valve, described low temperature fills formula fixing ball valve and comprise: valve body (1), spheroid (3), upstream valve seat (11), downstream valve seat (12), valve gap (19), valve rod (20), connection bracket (25) and actuator (26); It is inner that described spheroid (3) is positioned at described valve body (1); Described upstream valve seat (11) and downstream valve seat (12) to be positioned between described spheroid (3) and valve body (1) and to be positioned at described spheroid (3) both sides, described upstream valve seat (11) and be provided with valve seat retaining ring (8) between downstream valve seat (12) and described valve body (1); Be connected by bolts and nuts between described valve body (1) with valve gap (19); Described actuator (26) is fixed on connection bracket (25) and goes up and be connected with described valve rod (20);
It is characterized in that,
The two ends up and down of described spheroid (3) are respectively arranged with minor axis (5) and lower minor axis (6), and described upper minor axis (5) and lower minor axis (6) are structure as a whole with described spheroid (3), described valve rod (20) is connected with described upper minor axis (5);
The first elastic compensating parts (7), the general plug sealing ring of the first one-way sealing (9) and the general plug sealing ring of the second one-way sealing (10) is also provided with between described upstream valve seat (11) and described valve body (1);
The first elastic compensating parts (7) and the general plug sealing ring of two way sealed (16) is also provided with between described downstream valve seat (12) and described valve body (1);
Described upstream valve seat (11) is for stepped construction and can move in the horizontal direction; Described downstream valve seat (12) is for stepped construction and can move in the horizontal direction.
2. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, described valve gap is provided with stuffing box in (19), is provided with pad bearing (23) and packing ring (21) in described stuffing box; Described pad bearing (23) is stepped construction; The general plug sealing ring of the 4th one-way sealing (22) is provided with between described pad bearing (23) and described packing ring.
3. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, between described lower minor axis (6) and described valve body (1), be provided with the 3rd elastic compensating parts (2).
4. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, be provided with upper bearing (metal) (18) between described upper minor axis (5) and described valve gap (19), between described lower minor axis (6) and described valve body (1), be provided with lower bearing (4).
5. low temperature according to claim 4 fills formula fixing ball valve, it is characterized in that, described upper bearing (metal) (18) and lower bearing (4) include stainless steel casing and polychlorotrifluoroethylene liner.
6. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, described first elastic compensating parts comprise centering ring (701), belleville spring (702) and isolation backing plate (703).
7. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, described upper minor axis (5) upper end is provided with flat groove or square hole, and described valve rod (20) lower end is provided with the joint matched with described flat groove or square hole.
8. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, between the sealing surface of described valve body (1) and described valve gap (19), be provided with the general plug sealing ring of the 3rd one-way sealing (14) and spirotallic gasket (15).
9. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, between the sealing surface of described upstream valve seat (11) and described spheroid (3) and between the sealing surface of described downstream valve seat (12) and described spheroid (3), be provided with valve seat insert (13).
10. low temperature according to claim 1 fills formula fixing ball valve, it is characterized in that, the progression of the step of described upstream valve seat (11) is 4 ~ 6 grades.
11. low temperature according to claim 1 fill formula fixing ball valve, it is characterized in that, between described nut and described valve gap (19), be provided with the second elastic compensating parts (17).
12. low temperature according to claim 1 fill formula fixing ball valve, it is characterized in that, the position that described valve seat retaining ring (8) is connected with described upstream valve seat (11), downstream valve seat (12) is provided with backplate (801).
13. low temperature according to claim 1 fill formula fixing ball valve, it is characterized in that, described valve body (1) is provided with pollutant exhaust hole (27).
CN201520699649.7U 2015-09-10 2015-09-10 Low temperature upper assembling type fixes ball valve Active CN205026135U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106151578A (en) * 2016-08-12 2016-11-23 上海阀门厂股份有限公司 A kind of two way seal valve seat being applicable to multi-temperature and operating mode
CN106523729A (en) * 2015-09-10 2017-03-22 中国石油天然气集团公司 Low-temperature top-assembling type fixed ball valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106523729A (en) * 2015-09-10 2017-03-22 中国石油天然气集团公司 Low-temperature top-assembling type fixed ball valve
CN106151578A (en) * 2016-08-12 2016-11-23 上海阀门厂股份有限公司 A kind of two way seal valve seat being applicable to multi-temperature and operating mode
CN106151578B (en) * 2016-08-12 2018-10-09 上海阀门厂股份有限公司 A kind of two way seal valve seat suitable for multi-temperature operating mode

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