CN102748497B - Ultra-low temperature top-mounted type ball valve - Google Patents
Ultra-low temperature top-mounted type ball valve Download PDFInfo
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- CN102748497B CN102748497B CN201210246440.6A CN201210246440A CN102748497B CN 102748497 B CN102748497 B CN 102748497B CN 201210246440 A CN201210246440 A CN 201210246440A CN 102748497 B CN102748497 B CN 102748497B
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Abstract
The invention discloses an ultra-low temperature top-mounted type ball valve, which comprises a valve body, an upper valve cover, a valve rod, a valve base, a valve base fixer, a disc-shaped spring, a pre-fastening nut, an anti-rotation base ring, a water drop plate and a spring energy storage sealing ring, wherein the valve base is arranged inside a valve base fixer groove; the spring energy storage sealing ring is installed at one side of the valve base fixer; a positioning pin is installed on the anti-rotation base ring; the positioning pin is matched with a pin hole on the valve base fixer; a plurality of installing process holes are formed in the circumference of the pre-fastening nut; the pre-fastening nut and the valve base fixer are connected by threads; an reversed pressure ring is arranged on the other side of the valve base fixer; and the diameter of the reversed pressure ring is larger than the diameter of the spring energy storage sealing ring. With the adoption of the ball valve, the requirements on pressure releasing under any working condition can be met.
Description
Technical field
The present invention relates to a kind of upper-mounting type ball valve, particularly a kind of used at ultra-low temperature upper-mounting type ball valve that is applicable to LNG project and other worst cold case.
Background technique
At present, common cryogenic ball valve all adopts side-mounted structure, and for the valve under ultralow-temperature operation conditions, mostly take the method being connected with pipeline welding, once leaking appears in valve, only has valve is cut off from pipeline, just can overhaul, both increase maintenance cost, and brought no small loss to again client and enterprise.
On common cryogenic ball valve valve seat fixture, backpressure ring is not set, when central cavity pressure raises extremely, can causes spring energy-storage seal ring to damage, thereby cause valve leak.
In addition, common cryogenic ball valve is indefinite in pressure release direction, can not determine that middle cavity pressure is release from upstream or release from downstream, therefore strictly speaking, such valve does not all meet working condition requirement.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of maintenance, valve seat be convenient to from the high a kind of used at ultra-low temperature upper-mounting type ball valve of pressure release, good seal performance and reliability.
For achieving the above object, technological scheme of the present invention is as follows:
A kind of used at ultra-low temperature upper-mounting type ball valve, comprises valve body, bonnet, spheroid, valve rod, valve seat, valve seat fixture, belleville spring, pre-load nut, anti-rotation seat ring, draining board and spring energy-storage seal ring; Described valve seat is arranged in valve seat fixture groove, described spring energy-storage seal ring is contained in valve seat fixture one side, on described anti-rotation seat ring, locating stud is housed, described locating stud coordinates with the pin-and-hole on valve seat fixture, described pre-load nut circumference is provided with multiple installing technological holes, and pre-load nut adopts and is threaded with valve seat fixture; Described valve seat fixture opposite side is provided with backpressure ring, and the diameter of described backpressure ring is greater than the diameter of described spring energy-storage seal ring.
Preferably, in described used at ultra-low temperature upper-mounting type ball valve, anti-loosing slice is housed, described anti-loosing slice is provided with screw, and described screw can insert in pre-load nut auxiliary hole.
Preferably, described used at ultra-low temperature upper-mounting type ball valve also comprises packing seal structure, and described packing seal structure is placed in the top of bonnet.
Preferably, described packing seal structure is by filler pressing sleeve, Gland and media assemblage; Described filler pressing sleeve is connected with Gland, and described filler is connected with filler pressing sleeve.
Preferably, the bottom of described filler is provided with lip seal circle.
By technique scheme, the invention has the beneficial effects as follows:
The present invention is provided with backpressure ring on valve seat fixture opposite side, and the diameter of backpressure ring is greater than the diameter of described spring energy-storage seal ring; From piston effect, act on thrust on backpressure ring larger than acting on thrust on spring energy-storage seal ring, therefore when central cavity pressure raises extremely, pressure release direction is always towards the side that backpressure ring is housed; Therefore, the present invention can meet the pressure release requirement of any operating mode.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present invention;
Fig. 2 is backpressure ring enlarged view;
Fig. 3 is pre-load nut structural drawing;
Fig. 4 is packing seal structure schematic diagram.
Numeral and the represented corresponding part title of letter in figure:
1, valve body 2, spheroid 3, pre-load nut 4, spring seat 5, valve seat fixture 6, spring energy-storage seal ring 7, bonnet 8, draining board 9, lip seal circle 10, filler 11, hold-down grid 12, filler pressing sleeve 13, valve rod 14, screw 15, anti-loosing slice 16, valve seat 17, backpressure ring 18, locating stud 19, anti-rotation seat ring 20, belleville spring
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Referring to shown in Fig. 1 to Fig. 4, a kind of used at ultra-low temperature upper-mounting type ball valve of the present invention comprises valve body 1, bonnet 7, spheroid 2, valve rod 13, valve seat 16, valve seat fixture 5, belleville spring 20, pre-load nut 3, anti-rotation seat ring 19, draining board 8 and spring energy-storage seal ring 6.
Valve seat 16 of the present invention is arranged in valve seat fixture 5 grooves, spring energy-storage seal ring 6 is placed in a side of valve seat fixture 5, locating stud 18 is housed on anti-rotation seat ring 19, and locating stud 18 coordinates with the pin-and-hole on valve seat fixture 5, and pre-load nut 3 circumference are provided with multiple installing technological holes.
Valve rod is connected with transmitting torque by flat side with spheroid, and the torsional interaction providing when handle or actuator on valve rod 13 time, can make valve rod 13 drive spheroid 2 to rotate, thereby changes circulation area and realize the keying function of valve.
Pre-load nut 3 of the present invention adopts and is threaded with valve seat fixture 5, and pre-load nut 3 circumference are provided with auxiliary hole, when dismounting, can, by extracting tool insertion process hole, pre-load nut 3 be rotated, simultaneously, under the drive of pre-load nut 3, valve seat fixture 5 will move to the side away from spheroid; In the time that the distance between import and export valve seat fixture 5 is greater than spheroid width, spheroid can be taken out in valve pocket, remaining parts also can be taken out successively.
Valve seat fixture 5 opposite sides of the present invention are provided with backpressure ring 17, and the diameter of backpressure ring 17 is greater than spring energy-storage seal ring 6 diameters that are arranged on a side valve seat fixture 5, from piston effect, it is larger than acting on thrust on spring energy-storage seal ring 6 to act on thrust on backpressure ring 17, therefore when central cavity pressure raises extremely, pressure release direction is always towards the side that backpressure ring 17 is housed; Therefore, the present invention can meet the pressure release requirement of any operating mode.
Anti-loosing slice 15 is housed in valve pocket of the present invention, and anti-loosing slice 15 is provided with screw 14, and screw 14 is inserted in the auxiliary hole on pre-load nut 3 circumference and can play locking effect; Can effectively prevent from causing valve seat 16 pretensions than drops because pre-load nut 3 is lax, ensure the reliable sealing of valve.
The present invention is also provided with a packing seal structure, and packing seal structure is placed in the top of bonnet 7, and packing seal structure is made up of filler pressing sleeve 12, hold-down grid 11 and filler 10; Filler pressing sleeve 12 is connected with hold-down grid 11, and filler 10 is connected with filler pressing sleeve 12; External environment condition to the heat transfer process of bonnet 7 under, the cryogenic media that is penetrated into bonnet 7 inside will absorb heat, its temperature will raise, therefore can make filler temperature remain on more than 0 DEG C.
Filler of the present invention 10 bottoms are also provided with lip seal circle 9 one; this lip seal circle 9 is under the effect of pressure medium; its two lateral lips limit will be to radial dilatation; and reach the primary seal of filler 10, and block the possibility that medium contacts with filler 10, further protect filler 10 not to be subject to the impact of cryogenic media; simultaneously; reduce valve torque, improved valve seal performance, increased valve working life.
The present invention has the advantages such as good seal performance, long lifetime and beautiful shape.
More than show and described basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. a used at ultra-low temperature upper-mounting type ball valve, comprises valve body, bonnet, spheroid, valve rod, valve seat, valve seat fixture, belleville spring, pre-load nut, anti-rotation seat ring, draining board and spring energy-storage seal ring; Described valve seat is arranged in valve seat fixture groove, described spring energy-storage seal ring is contained in valve seat fixture one side, on described anti-rotation seat ring, locating stud is housed, described locating stud coordinates with the pin-and-hole on valve seat fixture, described pre-load nut circumference is provided with multiple installing technological holes, and pre-load nut adopts and is threaded with valve seat fixture; It is characterized in that, described valve seat fixture opposite side is provided with backpressure ring, and the diameter of described backpressure ring is greater than the diameter of described spring energy-storage seal ring, and described belleville spring is arranged between pre-load nut and spring seat.
2. a kind of used at ultra-low temperature upper-mounting type ball valve according to claim 1, is characterized in that: in described used at ultra-low temperature upper-mounting type ball valve, anti-loosing slice is housed, described anti-loosing slice is provided with screw, and described screw can insert in pre-load nut auxiliary hole.
3. a kind of used at ultra-low temperature upper-mounting type ball valve according to claim 1, is characterized in that: described used at ultra-low temperature upper-mounting type ball valve also comprises packing seal structure, and described packing seal structure is placed in the top of bonnet.
4. a kind of used at ultra-low temperature upper-mounting type ball valve according to claim 3, is characterized in that: described packing seal structure is by filler pressing sleeve, Gland and media assemblage; Described filler pressing sleeve is connected with Gland, and described filler is connected with filler pressing sleeve.
5. a kind of used at ultra-low temperature upper-mounting type ball valve according to claim 4, is characterized in that: the bottom of described filler is provided with lip seal circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210246440.6A CN102748497B (en) | 2012-07-16 | 2012-07-16 | Ultra-low temperature top-mounted type ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210246440.6A CN102748497B (en) | 2012-07-16 | 2012-07-16 | Ultra-low temperature top-mounted type ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102748497A CN102748497A (en) | 2012-10-24 |
| CN102748497B true CN102748497B (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210246440.6A Active CN102748497B (en) | 2012-07-16 | 2012-07-16 | Ultra-low temperature top-mounted type ball valve |
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| CN (1) | CN102748497B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511653B (en) * | 2013-10-24 | 2015-11-18 | 天津百利展发集团有限公司 | Ultra-low temperature plate valve |
| CN104565421A (en) * | 2013-10-29 | 2015-04-29 | 上海上冶阀门制造有限公司 | Double-power two-way composite sealing type low-temperature ball valve |
| CN103759067A (en) * | 2014-01-22 | 2014-04-30 | 大连大高阀门股份有限公司 | LNG multi-seal structure capable of guaranteeing zero leakage at position of valve rod under ultra-low temperature working condition |
| CN103742672B (en) * | 2014-01-27 | 2017-11-14 | 苏州纽威阀门股份有限公司 | top-loading ball valve |
| CN103759038B (en) * | 2014-01-27 | 2017-02-01 | 苏州纽威阀门股份有限公司 | Top-installed type ball valve |
| CN104089044B (en) * | 2014-07-15 | 2017-01-11 | 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 |
| CN104482244B (en) * | 2014-12-24 | 2017-11-21 | 四川精控阀门制造有限公司 | Formula fixing ball valve is filled on two way seal valve seat construction and ultralow temperature |
| CN105042106A (en) * | 2015-07-21 | 2015-11-11 | 上海凯工阀门有限公司 | Upper-mounted ultra-low temperature ball valve |
| CN108626428A (en) * | 2018-07-05 | 2018-10-09 | 杭州杭氧工装泵阀有限公司 | A kind of ultralow temperature upper-mounting type ball valve |
| WO2020028469A1 (en) | 2018-08-03 | 2020-02-06 | Saint-Gobain Performance Plastics Corporation | Ball valve seal |
| CN111173952B (en) * | 2020-01-18 | 2021-12-21 | 上海亚奥阀门有限公司 | Forged steel bidirectional hard sealing floating ultralow temperature ball valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4601308A (en) * | 1985-12-30 | 1986-07-22 | Joy Manufacturing Company | Ball valve with seat loading mechanism |
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2012
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| 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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| CN102748497A (en) | 2012-10-24 |
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