CN103527787A - Metal seal ring convenient to dismantle and power station regulating valve with metal seal ring - Google Patents
Metal seal ring convenient to dismantle and power station regulating valve with metal seal ring Download PDFInfo
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- CN103527787A CN103527787A CN201310528818.6A CN201310528818A CN103527787A CN 103527787 A CN103527787 A CN 103527787A CN 201310528818 A CN201310528818 A CN 201310528818A CN 103527787 A CN103527787 A CN 103527787A
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Abstract
The invention relates to a metal seal ring. The metal seal ring is characterized in that the seal ring is annular, the lower end of the seal ring is provided with a wedge-shaped sharp part, the upper end of the seal ring is provided with an annular rib edge protruded in the radial direction, and the upper surface of the annular rib edge is of a self-centering spherical surface or conical surface structure. The metal seal ring has the advantages that when the seal ring is applied to a valve, a pressing flange can still be automatically aligned with the seal ring when being not horizontal, circumferential stress balance is promoted, and a sealing stress state is improved. The upper annular rib edge of the seal ring enables the seal ring to provide a dismantling strength point and simultaneously has the effect of a reinforcing rib; not only is structural rigidity improved, but also seal ring machining, valve assembly and valve dismantling are facilitated, machining clamp design is simplified, machining precision is improved, and sealing performance is guaranteed finally.
Description
Technical field
The present invention relates to a kind of seal ring, also relate to a kind of control valve for power station that adopts ring structure.
Background technique
Control valve for power station for thermoelectricity steam unit is mainly distributed in boiler, steam turbine and the large system of subsidiary engine three.The thermal control technology of heat power station generally using the safety and economic operation of unit just as main target, and various modulating valve just becomes the special-purpose supplementary equipment that realizes safe operation.Unit parameter is higher, and unit capacity is larger, as higher in sealability, control characteristic, reliability requirement for the performance requirement of control valve for power station (comprising: minimum flow valve, feed water by-pass modulating valve, Desuperheating water regulating valve etc.).
For example: in current control valve for power station structure, the ring structure to the upper Transverse plane of external sealed employing lower end wedge shape of valve body and valve gap, this kind of seal ring is directly installed between valve body and valve gap, after upper Transverse plane relies on upper flange seam to compress, expanded in its wedge-type tip, lower end to realize valve body and valve gap to external sealed.Though it can meet seal request to a certain extent, also has certain shortcoming: because the expansion of wedge-type tip kills, the dismounting valve that disintegrates will be very difficult.And during machining, this seal ring is due to reasons in structure, and rigidity is poor, extremely easily distortion, technology capability is poor, and fixture clamping is had relatively high expectations, and is unfavorable for improving machining accuracy, is difficult to guarantee the sealability of designing requirement.Therefore research and develop be a kind ofly convenient to dismounting and good seal performance, rigidity novel seal coil structures high, that be easy to clamping processing is imperative.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of convenient disassembly, good seal performance, rigidity is high and the on-deformable metal o-ring of machining clamping, and a kind of control valve for power station that adopts this metal sealing coil structures is also provided.
For solving the problems of the technologies described above, technological scheme of the present invention is: a kind of metal o-ring of convenient disassembly, its innovative point is: described seal ring is annular, its lower end has a wedge shape tip, upper end has a ring rib limit of radially protruding, and the upper surface on this ring rib limit is self contering sphere or cone structure.
Preferably, the lower end side of described seal ring is provided with a ring annular groove, and this circular groove is positioned at the flat face of the non-wedge shape of seal ring inclined-plane side.
Preferably, described circular groove is arc-shaped slot, and its radius of arc R is 3 ~ 5mm.
A kind of control valve for power station that adopts above-mentioned metal sealing coil structures, its innovative point is: comprise valve body, valve gap, supported flange, seal ring, valve gap, valve body hollow, upper is stretched in the lower end of valve gap, the lower end of valve gap has an annular flange flange extending radially, and the upper surface of this annular flange flange is a circular cone; Seal ring, seal ring lower end has a wedge shape tip, and upper end has a ring rib limit of radially protruding, and the upper surface on this ring rib limit is self contering sphere or cone structure; Supported flange, the inner ring of supported flange and lower end surface intersection are provided with the annular embedding groove that a circle and seal ring upper end match; Supported flange is fixed on the upper-end surface of valve body by bolt, nut, and by the ring rib limit, upper end of the even press seal circle of annular embedding groove, realizes the sealing of valve gap and valve body.
The invention has the advantages that: the top of seal ring is self contering sphere or cone structure, be that overhead pulley profile is the conical surface or sphere design, even top is for the flange that compresses or gland is out-of-level also can realize and seal ring automatic alignment while installing like this, impel one week stress equalization.Meanwhile, make to compress flange or the gland automatic centering of use, increase area of contact, reduce contact pressure stress, more rationally improve sealing stress.
The upper, annular rib limit of seal ring, makes seal ring that the Point of Strength of a dismounting can be provided, and plays the effect of stiffening rib simultaneously; Not only improve the rigidity of structure, be convenient to seal ring machine and clamp and valve assembling and valve dismounting, simplify machining fixture design, improve machining precision, finally guarantee sealability.And the lower end side of seal ring is provided with a ring annular groove, when supported flange press seal circle, the lower end of seal ring is deformable seal smoothly, improves sealing effect.
Sealing circle is the vital part of this series products, can be widely used in all kinds of power station valve products, be particularly useful for thermal power generation steam unit as products such as minimum flow regulating valve, Desuperheating water regulating valve, feed water by-pass modulating valve and power station High Temperature High Pressure high-differential-pressure drain valves, for adjust flux, pressure and medium isolation.
Accompanying drawing explanation
Fig. 1 is metal o-ring structural representation in the present invention.
Fig. 2 is control valve for power station example structure schematic diagram of the present invention.
Embodiment
The present invention has disclosed a kind of metal sealing ring structure, it as shown in Figure 1, in the lower end of seal ring 8, there is 8a， upper end, a wedge shape tip and there is a ring rib limit 8b who radially protrudes, and the upper surface of this ring rib limit 8b is self contering sphere or cone structure.The lower end side of seal ring 8 is provided with a ring annular groove 8c, and this circular groove 8c is positioned at the flat face of the non-wedge shape of seal ring inclined-plane side.
The present embodiment is the structural design drawing that is applied to power station minimum flow regulating valve.Refer to Fig. 1,2, comprise valve body 1, throttling plate 4, spool 5, balanced seal circle 7, seal ring 8, valve rod 10, valve gap 11, Gland 14, filler 15, filler 16, nut 18, bolt 19, supported flange 20 cap 22.
Valve gap 11 is installed on valve body 1 mesopore top, and valve body 1 inner chamber is stretched into through valve gap 11 in the lower end of valve rod 10, and the lower end of valve rod 10 is connected with the spool 5 being built in valve body.Valve rod 10 lower end surface and spool adopt the design of conical surface body, and during cooperation, the conical surface possesses automatic alignment function, effectively eliminates the concentricity after spool is connected with valve rod.The top of spool 5 adopts and cap 22 is held spool 5 and valve rod 10 tightly.Specifically, and cap 22 and valve rod 10 adopt and be threaded, and during cap 22 rotation, automatically hold tightly with valve rod 10, eliminates both matching gaps, holds rear employing resilient key 9 tightly locked with valve rod, prevents from becoming flexible.In addition, spool 5 cylindricals have designed balanced seal circle 7, and the sealing of auxiliary valve gap and spool more steady while being equivalent to the moving up and down of bearing assurance spool simultaneously.
When opening, valve rod 10 moves in advance and moves, and band movable valve plug 5 moves up and down, and realizes regulation.Balance hole A has been offered in spool 5 upper ends, has eliminated the pressure of spool epicoele, realizes spool and opens without pressure reduction, and this is conducive to reduce final controlling element thrust, thereby reduces product deployment cost.
The lower end of valve gap 11 has an annular flange flange extending radially, and the upper surface of this annular flange flange is a circular cone.
And the lower end of seal ring 8 has 8a， upper end, a wedge shape tip and has a ring rib limit 8b who radially protrudes, and the upper surface of this ring rib limit 8b is self contering sphere or cone structure.The lower end side of seal ring 8 is provided with a ring annular groove 8c, and this circular groove 8c is positioned at the flat face of the non-wedge shape of seal ring inclined-plane side.
As more particular embodiment of the present invention: this circular groove 8c is arc-shaped slot, and its radius of arc R is 3 ~ 5mm.
The inner ring of supported flange 20 and lower end surface intersection are provided with the annular embedding groove that a circle and seal ring upper end match; Supported flange 20 is fixed on the upper-end surface of valve body 1 by bolt 19, nut 10, and by the ring rib limit, upper end of the even press seal circle 8 of annular embedding groove, realizes the sealing of valve gap 11 and valve body 1.
Working principle:
Drive unit connects valve rod, and when valve rod moves down, the area of passage of throttling element reduces, and valve output flow reduces, and when spool moves at the end, primary seal pair is closed in advance, and valve is in closed condition.During unlatching, valve rod band movable valve plug is opened, and because spool moves in without pressure reduction state, has reduced final controlling element working thrust.Along with moving up of spool, throttling element Flow area increases gradually, the corresponding increase of valve flow, thus the adjusting that realizes the flow of valve is controlled.
Sealing principle:
The top of seal ring is self contering sphere or cone structure, and overhead pulley profile is the conical surface or sphere design, and corresponding with it embedding groove is set on supported flange, when supported flange is out-of-level, also can realize and seal ring automatic alignment.
The upper, annular rib limit of seal ring, makes seal ring that the Point of Strength of a dismounting can be provided when playing the effect of stiffening rib, can simplify machining fixture design, improves machining precision, guarantees to guarantee sealability.And the lower end side of seal ring is provided with a ring annular groove, when supported flange press seal circle, better sealing can be realized to the distortion of circular groove side smoothly in the lower end of seal ring.
The control valve for power station embodiment who it will be understood by those skilled in the art that above-mentioned employing sealing coil structures is only schematically, is not circumscribed, and sealing circle is not only applicable to such modulating valve, is equally applicable to the valve body of other pattern valves to external sealed.
Claims (4)
1. a metal o-ring for convenient disassembly, is characterized in that: described seal ring is annular, and its lower end has a wedge shape tip, and upper end has a ring rib limit of radially protruding, and the upper surface on this ring rib limit is self contering sphere or cone structure.
2. seal ring according to claim 1, is characterized in that: the lower end side of described seal ring is provided with a ring annular groove, and this circular groove is positioned at the flat face of the non-wedge shape of seal ring inclined-plane side.
3. seal ring according to claim 1, it is characterized in that: described circular groove is arc-shaped slot, and its radius of arc R is 3 ~ 5mm.
4. adopt a control valve for power station for above-mentioned metal sealing coil structures, it is characterized in that: comprise valve body, valve gap, supported flange, seal ring,
Valve gap, valve body hollow, upper is stretched in the lower end of valve gap, and the lower end of valve gap has an annular flange flange extending radially, and the upper surface of this annular flange flange is a circular cone;
Seal ring, seal ring lower end has a wedge shape tip, and upper end has a ring rib limit of radially protruding, and the upper surface on this ring rib limit is self contering sphere or cone structure;
Supported flange, the inner ring of supported flange and lower end surface intersection are provided with the annular embedding groove that a circle and seal ring upper end match; Supported flange is fixed on the upper-end surface of valve body by bolt, nut, and by the ring rib limit, upper end of the even press seal circle of annular embedding groove, realizes the sealing of valve gap and valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310528818.6A CN103527787B (en) | 2013-11-01 | 2013-11-01 | A kind of control valve for power station adopting the metal sealing coil structures of convenient disassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310528818.6A CN103527787B (en) | 2013-11-01 | 2013-11-01 | A kind of control valve for power station adopting the metal sealing coil structures of convenient disassembly |
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| CN103527787A true CN103527787A (en) | 2014-01-22 |
| CN103527787B CN103527787B (en) | 2016-03-23 |
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| CN201310528818.6A Active CN103527787B (en) | 2013-11-01 | 2013-11-01 | A kind of control valve for power station adopting the metal sealing coil structures of convenient disassembly |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224560A (en) * | 2016-08-29 | 2016-12-14 | 约翰斯顿流体科技（无锡）有限公司 | A kind of regulation valve being conveniently replaceable rubber ring |
| CN106704593A (en) * | 2016-12-29 | 2017-05-24 | 常熟市南湖化工设备制造有限责任公司 | Sealed packing box capable of being fast dismounted and mounted |
| CN106884983A (en) * | 2017-04-17 | 2017-06-23 | 杭州华惠阀门有限公司 | Removable seal structure |
| CN107477246A (en) * | 2017-10-16 | 2017-12-15 | 吴忠仪表有限责任公司 | A kind of easy-maintaining spray desuperheating valve of high-performance |
| CN113007588A (en) * | 2021-03-29 | 2021-06-22 | 艾肯（江苏）工业技术有限公司 | Self-centering floating ball trap |
| CN114233854A (en) * | 2021-12-28 | 2022-03-25 | 南通市电站阀门有限公司 | Metal self-sealing ring for valve, machining tool and machining method |
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| CN200943797Y (en) * | 2006-08-28 | 2007-09-05 | 青岛海力威密封有限公司 | Assembled type pipe joint pipe clip rubber gasket ring |
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| CN106224560A (en) * | 2016-08-29 | 2016-12-14 | 约翰斯顿流体科技（无锡）有限公司 | A kind of regulation valve being conveniently replaceable rubber ring |
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| CN106704593A (en) * | 2016-12-29 | 2017-05-24 | 常熟市南湖化工设备制造有限责任公司 | Sealed packing box capable of being fast dismounted and mounted |
| CN106704593B (en) * | 2016-12-29 | 2018-06-19 | 常熟市南湖化工设备制造有限责任公司 | A kind of gland packing box of fast demountable |
| CN106884983A (en) * | 2017-04-17 | 2017-06-23 | 杭州华惠阀门有限公司 | Removable seal structure |
| CN107477246A (en) * | 2017-10-16 | 2017-12-15 | 吴忠仪表有限责任公司 | A kind of easy-maintaining spray desuperheating valve of high-performance |
| CN113007588A (en) * | 2021-03-29 | 2021-06-22 | 艾肯（江苏）工业技术有限公司 | Self-centering floating ball trap |
| CN113007588B (en) * | 2021-03-29 | 2022-03-25 | 艾肯（江苏）工业技术有限公司 | Self-centering floating ball trap |
| CN114233854A (en) * | 2021-12-28 | 2022-03-25 | 南通市电站阀门有限公司 | Metal self-sealing ring for valve, machining tool and machining method |
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|---|---|
| CN103527787B (en) | 2016-03-23 |
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Denomination of invention: A power station regulating valve with a metal sealing ring structure that is easy to disassemble Effective date of registration: 20230619 Granted publication date: 20160323 Pledgee: Industrial and Commercial Bank of China Limited Rugao Branch Pledgor: NANTONG POWER STATION VALVE Co.,Ltd. Registration number: Y2023980044733 |