CN103470790B - Three eccentric metal seal butterfly valve - Google Patents
Three eccentric metal seal butterfly valve Download PDFInfo
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- CN103470790B CN103470790B CN201310416740.9A CN201310416740A CN103470790B CN 103470790 B CN103470790 B CN 103470790B CN 201310416740 A CN201310416740 A CN 201310416740A CN 103470790 B CN103470790 B CN 103470790B
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Abstract
The present invention relates to a kind of three eccentric metal seal butterfly valve, comprise valve body, valve plate, valve rod; Described valve rod top is disposed with Bearing washer, the first metal bearing and Gland etc.; Described Gland is fastened on valve body; Described bottom is fastened on body base; Feature is: described valve rod and valve plate adopt key pin to be mounted in valve body, valve seal ring is arranged in valve body, compress with monolateral porous trim ring and valve body trim ring, described valve plate sealing ring is arranged in valve plate, and described principle of hollow metal O-ring is arranged on the below of described valve plate sealing ring; Described second metal bearing is equipped with in described valve rod top and the bottom, is provided with thrust pad and pad between described second metal bearing and spacing semicircular ring; Limiting board stop screw is fastened on described valve rod bottom, and the present invention changes the basic structure of three eccentricity, is suitable for high temperature, high pressure operating mode; Both meet usage requirement, again reduced complete machine cost, also extend the working life of valve simultaneously.
Description
Technical field
The present invention relates to a kind of three eccentric metal seal butterfly valve, cut off and station boiler vapour system application for coal, chemical industry large-diameter pipe track media, belong to machinery automatic control technology field.
Background technique
At present, especially Coal Chemical Industry large-diameter pipe track media cuts off and station boiler vapour system application, applying unit and designing institute generally all adopt the mode of import, on the one hand because have the adjustment of High Temperature High Pressure, especially High Pressure Difference and cut-out, two way sealed requirement; On the other hand because position is important, product performance require high; The three eccentric butterfly valve of this occasion used, substantially be all the product of import, domestic three eccentric butterfly valve is all multilayered structure substantially, Expanded graphite is used to add the mode of tinsel, this structure because easily sealing and adopt by most of producer, but this multi-level seal ring also has very large disadvantage, under being difficult to adapt to high temperature, especially use under the occasion of temperature more than 450 degree; In addition, under the impact of high-pressure medium, Expanded graphite is easy to be destroyed, thus makes seal failure; Moreover Expanded graphite dynamic seal (packing) under containing the medium of water vapour for a long time, the life-span is very short.
In prior art, three eccentric butterfly valve sealing structure ring is all be placed on valve plate substantially, and valve seat and valve bodyization design, valve body pile-up welding hard alloy, the disadvantage of such design is exactly that be difficult to repair, interchangeability is poor once built-up welding sealing surface has damage.Application under high temperature occasion, external producer is mostly the requirement by selecting the linkage structure of upper key downside pin and suitable material mixture ratio and process to meet thermal expansion, and the domestic experience not having this respect, therefore domestic three eccentric butterfly valve is difficult to meet applied at elevated temperature requirement, is easy to cause the valve under high temperature stuck.For the adjustment occasion of High Pressure Difference, owing to there being very large dynamic torque phenomenon, being all rely on the size improving actuator to meet the adjustment requirement under High Pressure Difference usually, the complete machine cost of valve can be increased like this.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thus a kind of three eccentric metal seal butterfly valve is provided, change the basic structure of three eccentricity, both met above working condition requirement, and again reduced complete machine cost, also extend the working life of valve simultaneously.
According to technological scheme provided by the invention, a kind of three eccentric metal seal butterfly valve, comprises valve body, valve plate, valve rod; Described valve rod top is disposed with Bearing washer, the first metal bearing, matrix liner, filler, filler pressing sleeve, Gland; Described Gland is fastened on valve body; Described bottom is fastened on body base; Feature is: described valve rod and valve plate adopt key pin to be mounted in valve body, valve seal ring is arranged in valve body, described valve seal ring external diameter and valve inner are provided with gap, described valve seal ring and valve body are sealed by valve seal packing ring, compress with monolateral porous trim ring and valve body trim ring, described valve plate sealing ring is arranged in valve plate, and described principle of hollow metal O-ring is arranged on the below of described valve plate sealing ring; Described second metal bearing, spacing semicircular ring, thrust pad, pad are equipped with in described valve rod top and the bottom, are provided with thrust pad and pad between described second metal bearing and spacing semicircular ring; Limiting board stop screw is fastened on described valve rod bottom, and stop screw prevents valve rod from moving up.
As improvement of the present invention, between described valve plate sealing ring and valve plate, be provided with gap.
As improvement of the present invention, on outside described principle of hollow metal O-ring, have some self-sealing orifice.
As improvement of the present invention, described monolateral porous trim ring is provided with several holes.
As improvement of the present invention, described first metal bearing and the second metal bearing are hatch frame.
As improvement of the present invention, between described bottom and valve body, be provided with bottom packing ring.
As improvement of the present invention, described valve rod is provided with pin, and offers keyway.
Compared with the prior art the present invention has following technical characterstic:
1, monolateral porous ring pressing construction design, namely special ring pressing construction is used, utilize the flow principles of medium, the huge eddy current that High Pressure Difference medium produces through reverse valve plate side flows out through the porous of trim ring, energy a large amount of so all by porous to diluting, greatly reduce valve plate pressure reduction herein, thus reduce valve plate dynamic torque herein, and then reduce the size of actuator, reduce cost and ensure safe operation to greatest extent.
2, the principle of hollow metal O-ring structure below valve plate sealing ring is placed on, meet the seal request under high-temperature and high-pressure conditions well, the less end-face friction of O shape circle guarantees floatability and the automatic centering performance of seal ring simultaneously, avoid and use winding packing ring not only to need very large pretightening force, and the phenomenon just cannot floated after pretension, meet the seal request under high temperature condition better.Divided by upper outside, also beaten a lot of self-sealing orifice in the outside of O shape circle, pressure medium enters in the hole of O shape circle, produces self-packing effect.When temperature is more than 500 degree, also select inner inflatable shape O shape coil structures targetedly, under high temperature, the expansion of gas enhances seal ring elasticity at high temperature, ensure that sealing effect.Because be relatively wound around point to there is certain elasticity, so the requirement of two way sealed can be met when not changing actuator.
3, opening design bearing ensure that on the one hand coordinating of high temperature lower bearing and axle, also avoids stuck phenomenon at high temperature on the other hand, because enough spaces are left to expanding in the gap of opening.
4, move in the anti-blow design of valve rod, use spacing semicircular ring to prevent valve rod from moving down, utilize the stop screw of stem bottom to limit valve rod simultaneously and move up.These are different in the design of stem bottom with traditional semicircular ring, decrease the distance of semicircular ring and valve plate end, avoid in the case of a high temperature, and the thermal expansion of the length direction of whole valve rod causes the space that the semicircular ring of bottom does not expand to cause stuck phenomenon; Thus the application be more applicable under high temperature occasion.
5, arrange independent seal ring structure in valve body, interchangeability improves on the one hand, also reduces manufacture difficulty on the other hand, avoids and carry out built-up welding operation in valve body.Simultaneously can select material more widely, design certain gap by valve seal ring external diameter and valve inner, thus ensure that thermal expansion surplus, avoid rising extremely at high temperature.
6, the upper key downside pin be connected with valve plate by valve rod is designed, and avoids valve rod and the different pin caused of valve plate thermal expansion to cut off phenomenon, thus is more applicable to using under high temperature.
Accompanying drawing explanation
Fig. 1 is three eccentric metal seal butterfly valve overall structure figure of the present invention.
Fig. 2 is valve body structure plan view of the present invention.
Fig. 3 is the present invention's monolateral porous ring pressing construction schematic diagram.
Fig. 4 is metal bearing hatch frame schematic diagram of the present invention.
Fig. 5 is the anti-blow structure I cross section view of valve rod of the present invention.
Fig. 6 is valve plate sealing ring of the present invention and hollow O shape circle sealing configuration II cross section view.
Embodiment
Embodiment in is by reference to the accompanying drawings further described by the present invention below:
As Figure 1-Figure 5, valve body 1 is comprised; Valve plate 2; Valve rod 3(filler 31; Filler pressing sleeve 32; Gland 33; Matrix liner 34; Valve seal ring packing ring 35; Bottom packing ring 36); Valve plate sealing ring 4; Valve seal ring 5(hexagon socket cap head screw 51,52; Stop screw 53; Hexagon head bolt 54; Spring washer 55; Stud 56; Hexagon nut 57; Keyway 58); First metal bearing 61, second metal bearing 62; Pin 7; Spacing semicircular ring 8; Valve body trim ring 9; Valve plate trim ring 10; Bottom 11; Thrust pad 12; Pad 13; Monolateral porous trim ring 14; Limiting board 15; Bearing washer 16; Principle of hollow metal O-ring 17.
In the present invention, valve rod 3 adopts key downside pin structure installment in valve body 1 with the connection of valve plate 2, be arranged in valve body 1 after valve seal ring 5 processes, sealed by valve seal packing ring 35 with valve body 1, compress with monolateral porous trim ring 14 and valve body trim ring 9, described valve body trim ring 9 hexagon socket cap head screw 52 is pressed on valve body 1, valve plate trim ring 10 hexagon socket cap head screw 51 is pressed on valve body 1, described valve plate sealing ring 4 is arranged in valve plate 2, gap is provided with between described valve plate sealing ring 4 and valve plate 2, described gap enters in principle of hollow metal O-ring 17 groove, described genus hollow O shape is enclosed 17 outsides and is had aperture.Described valve rod 3 is disposed with Bearing washer 16, first metal bearing 61, matrix liner 34, filler 31, filler pressing sleeve 32, Gland 33; Described Gland 33 is by stud 56; Hexagon nut 57 is fastened on valve body 1.Described valve rod 3 is equipped with described second metal bearing 62, spacing semicircular ring 8, thrust pad 12, between pad 13, second metal bearing 62 and spacing semicircular ring 8, is provided with thrust pad 12 and pad 13; With stop screw 53, limiting board 15 is fastened on described valve rod 3 bottom, stop screw 53 prevents valve rod 3 from moving up; Be provided with bottom packing ring 36 between bottom 11 and valve body 1, described bottom 11 hexagon head bolt 54, spring washer 55 are fastened on bottom valve body 1.Described valve rod 3 is provided with pin 7, and offers keyway 58.Described first metal bearing 61 and the second metal bearing 62 are designed to hatch frame.
As shown in Figure 1-Figure 3, in the present invention, monolateral porous trim ring 14 is provided with several holes, adopt monolateral porous structure, High Pressure Difference medium after reverse valve plate, can form an eddy current, if do not have this porous trim ring in valve plate 2 bottom of Fig. 2 after valve plate, then all pressure drop can act on valve plate, then valve plate needs to bear very large moment of torsion, if want to allow valve plate fix, then needs very large actuator's moment of torsion.Porous now on this special ring pressing construction can resist most pressure drop, thus the pressure drop of bearing on valve plate reduces, thus reduces actuator's moment of torsion.Thus the moment of torsion reduced when handle high voltages difference medium regulates.
As shown in Figure 6, as can be seen from Figure 6, mesohigh medium of the present invention enters in principle of hollow metal O-ring 17 groove through valve plate sealing ring 4 and the gap of valve plate 2, thus entering into outside, to open foraminate principle of hollow metal O-ring 17 inner, selfsealings effect is produced by pressure medium, pressure is higher, and sealability is better.And valve plate sealing ring 4 internal diameter and valve plate 2 have clearance for expansion, stuck under preventing high temperature, due to principle of hollow metal O-ring 17, to have pretightening force little, the features such as end-face friction coefficient is little, therefore the position of valve plate sealing ring 4 changes a little, can automatically and valve seal ring 5 adapt to.This structure is particularly suitable for high temperature, high pressure operating mode.
As Figure 1 and Figure 4, in the present invention, the first metal bearing 61, second metal bearing 62 is designed to hatch frame, adapts to the expansion requirements of high temperature so better, has enough gaps to expand under making high-temperature expansion, avoids the dead phenomenon that rises under high temperature.
As shown in Fig. 5, Fig. 1, in the present invention valve rod 3 anti-blow design on move on to valve plate 2 side, this reduces the distance between valve rod 3 to spacing semicircular ring 8, reduce the diametric swell increment of valve rod 3, thus avoid excessive valve rod 3 and the bottom 11 of causing of swell increment when spacing semicircular ring 8 is placed on bottom valve rod 3 and to rise dead risk.Spacing semicircular ring 8 is placed on top, and valve rod 3 can not move down, and stop screw 53 below prevents valve rod 3 from moving up.This structural design, thus be more applicable to the application under high temperature occasion.
As shown in Fig. 1, Fig. 6,2 seal rings are had in the present invention, one is valve seal ring 5, another is valve plate sealing ring 4, valve seal ring 5 uses special fixture to process and puts into separately valve body 1 afterwards, sealed by valve seal packing ring 35 with the sealing of valve body, compress with monolateral porous trim ring 14 and valve body trim ring 9, once after compressing, add the impacting force of companion flange, this valve seal ring would not loose again.The floating seal of valve be by valve plate sealing ring 4 floating come.This structure has very strong interchangeability, once valve seal ring 5 damages, changing a new seal ring can use.And retaining certain expansion gap between valve seal ring 5 and valve body, the material choosing multiple quality material of valve seal ring 5 is to tackle the expansion requirements under high temperature.And pile-up welding hard alloy is as seal ring in original valve body, manufacture cost is high and once damage, be difficult to maintenance, and other materials cannot be selected to mate with valve plate sealing ring 4, therefore be difficult to adaptation superhigh temperature operating mode.
As shown in Figure 1, as can be seen from Figure 1, in the present invention, valve rod 3 and the connection of valve plate 2 adopt pin structure under key, avoid the thermal expansion of high-temperature expansion lower valve rod and valve plate inconsistent time pin cut off phenomenon.
After Product Assembly is good, should carry out leak-testing according to the flow direction valve shown in Fig. 1, stream closes shape; Also stream open form can be adopted to carry out testing to check two way sealed performance.
In the present invention be under the harsh operating mode such as High Pressure Difference, high temperature, two way sealed for a long time dependence on import three eccentric butterfly valve when and propose a kind of new structure three eccentric butterfly valve, can meet onsite application requirement well by the structural design of novelty, overcoming domestic three eccentric butterfly valve can not high temperature resistant, High Pressure Difference; Two way sealed is poor; The shortcomings such as seal ring interchangeability is poor, valve torque is large, the life-span is short, instead of import completely.
The present invention is widely used in Coal Chemical Industry large-diameter pipe track media and cuts off and station boiler vapour system occasion, through creationary design, be designed to unique structure, original produced problem is thoroughly eliminated, fundamentally solve Problems existing, both meet usage requirement, extend working life again.
Claims (8)
1. a three eccentric metal seal butterfly valve, comprises valve body (1), valve plate (2), valve rod (3); Described valve rod (3) top is disposed with Bearing washer (16), the first metal bearing (61), matrix liner (34), filler (31), filler pressing sleeve (32), Gland (33); Described Gland (33) is fastened on valve body (1); Bottom (11) is fastened on valve body (1) bottom; It is characterized in that: described valve rod (3) and valve plate (2) adopt key pin to be mounted in valve body (1), valve seal ring (5) is arranged in valve body (1), described valve seal ring (5) external diameter and valve body (1) inside are provided with gap, described valve seal ring (5) and valve body (1) are sealed by valve seal packing ring (35), compress with monolateral porous trim ring (14) and valve body trim ring (9), valve plate sealing ring (4) is arranged in valve plate (2), and principle of hollow metal O-ring (17) is arranged on the below of described valve plate sealing ring (4); The second metal bearing (62), spacing semicircular ring (8), thrust pad (12), pad (13) are equipped with in bottom on described valve rod (3), are provided with thrust pad (12) and pad (13) between described second metal bearing (62) and spacing semicircular ring (8); Limiting board (15) stop screw (53) is fastened on described valve rod (3) bottom, and stop screw (53) prevents valve rod (3) from moving up.
2. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: be provided with gap between described valve plate sealing ring (4) and valve plate (2).
3. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: outside has some self-sealing orifice to described principle of hollow metal O-ring (17).
4. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: described monolateral porous trim ring (14) is provided with several holes.
5. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: described first metal bearing (61) and the second metal bearing (62) are respectively hatch frame.
6. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: be provided with bottom packing ring (36) between described bottom (11) and valve body (1).
7. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: described valve rod (3) is provided with pin (7).
8. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: described valve rod (3) offers keyway (58).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310416740.9A CN103470790B (en) | 2013-09-12 | 2013-09-12 | Three eccentric metal seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310416740.9A CN103470790B (en) | 2013-09-12 | 2013-09-12 | Three eccentric metal seal butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103470790A CN103470790A (en) | 2013-12-25 |
| CN103470790B true CN103470790B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310416740.9A Active CN103470790B (en) | 2013-09-12 | 2013-09-12 | Three eccentric metal seal butterfly valve |
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| CN (1) | CN103470790B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329475B (en) * | 2014-11-04 | 2017-01-11 | 无锡市亚迪流体控制技术有限公司 | Three-eccentric and bidirectional metal sealing butterfly valve |
| CN105387222A (en) * | 2015-12-16 | 2016-03-09 | 江苏神通阀门股份有限公司 | Limiting structure for a valve rod |
| CN109084035A (en) * | 2018-09-05 | 2018-12-25 | 温州上沃阀门科技有限公司 | Applied to the valve plate of butterfly valve and the installing mechanism of valve rod |
| CN108916397A (en) * | 2018-09-06 | 2018-11-30 | 温州上沃阀门科技有限公司 | The valve plate of eccentric hard sealed flygate seals installing mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202017775U (en) * | 2011-05-09 | 2011-10-26 | 郑州市郑蝶阀门有限公司 | Triple eccentric metal seal butterfly valve |
| CN202531865U (en) * | 2012-04-21 | 2012-11-14 | 浙江欧尼特阀门有限公司 | Triple eccentric two-way hard seal butterfly valve |
| CN202914768U (en) * | 2012-07-18 | 2013-05-01 | 上海埃维玛阀门有限公司 | Three-eccentric center butterfly valve |
| CN203146847U (en) * | 2013-03-15 | 2013-08-21 | 胡相兰 | Butterfly valve with good sealing performance |
| CN203585359U (en) * | 2013-09-12 | 2014-05-07 | 无锡市亚迪流体控制技术有限公司 | Triple-eccentric metal sealing butterfly valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10060004B4 (en) * | 2000-12-02 | 2005-08-25 | Warex Valve Gmbh | Shut-off device with a pivoting rotary flap and an entropy-elastic ring seal held on a support ring |
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2013
- 2013-09-12 CN CN201310416740.9A patent/CN103470790B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202017775U (en) * | 2011-05-09 | 2011-10-26 | 郑州市郑蝶阀门有限公司 | Triple eccentric metal seal butterfly valve |
| CN202531865U (en) * | 2012-04-21 | 2012-11-14 | 浙江欧尼特阀门有限公司 | Triple eccentric two-way hard seal butterfly valve |
| CN202914768U (en) * | 2012-07-18 | 2013-05-01 | 上海埃维玛阀门有限公司 | Three-eccentric center butterfly valve |
| CN203146847U (en) * | 2013-03-15 | 2013-08-21 | 胡相兰 | Butterfly valve with good sealing performance |
| CN203585359U (en) * | 2013-09-12 | 2014-05-07 | 无锡市亚迪流体控制技术有限公司 | Triple-eccentric metal sealing butterfly valve |
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| CN103470790A (en) | 2013-12-25 |
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