CN103470790A - Three eccentric metal seal butterfly valve - Google Patents
Three eccentric metal seal butterfly valve Download PDFInfo
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- CN103470790A CN103470790A CN2013104167409A CN201310416740A CN103470790A CN 103470790 A CN103470790 A CN 103470790A CN 2013104167409 A CN2013104167409 A CN 2013104167409A CN 201310416740 A CN201310416740 A CN 201310416740A CN 103470790 A CN103470790 A CN 103470790A
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Abstract
The invention relates to a three eccentric metal seal butterfly valve comprising a valve, a valve plate and a valve rod. The upper portion of the valve rod is sequentially provided with a bearing ring, a first metal bearing and a filler pressing cover. The filler pressing cover is fixed on the valve body tightly, and a bottom cover is fixed at the bottom of the valve body tightly. The three eccentric metal seal butterfly valve is characterized in that the valve rod and the valve plate are connected to or mounted in the valve body through key pins, a valve body seal ring is arranged in the valve body and is tightly pressed by a single-edge multi-hole ring and a valve body pressing ring and is arranged in the valve plate, and a metal hollow O-shaped ring is arranged under the valve body seal ring; the upper and lower portions of the valve rod are provided with a second metal bearing, and a push stopping gasket and a gasket are arranged between the second metal bearing and a limiting semi-ring; a limiting plate is tightly fixed at the bottom end of the valve rod through limiting screws. The basic structure of a three eccentric metal seal butterfly valve is changed, and the three eccentric metal seal butterfly valve is adoptable to high temperature, high pressure conditions; using requirements are met, entire cost is lowered, and the service life of the valve is prolonged.
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 the adjusting of High Temperature High Pressure, especially High Pressure Difference and cut-out, two way sealed requirement are arranged; Because position is important, product performance require high on the other hand; The three eccentric butterfly valve of this occasion of using, basically be all the product of import, domestic three eccentric butterfly valve is all multilayered structure basically, use Expanded graphite to add the mode of tinsel, this structure is adopted by most of producer because easily seal, but this multi-level seal ring also has very large disadvantage, be difficult to adapt under high temperature, especially under the occasions of temperature over 450 degree, use; In addition, under the impact of high-pressure medium, Expanded graphite is easy to destroyed, thereby makes seal failure; Moreover Expanded graphite is containing dynamic seal (packing) under 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 to be placed on valve plate basically, valve seat and valve body integrated design, the valve body pile-up welding hard alloy, once the disadvantage of design is exactly that the built-up welding sealing surface has damage like this, is difficult to be repaired, interchangeability is poor.In the face of the application under the high temperature occasion, external producer is mostly linkage structure by selecting upper key downside pin and suitable material mixture ratio and processes the requirement that meets thermal expansion, and the domestic experience that there is no this respect, therefore domestic three eccentric butterfly valve is difficult to meet the applied at elevated temperature requirement, is easy to cause the valve under high temperature stuck.For the adjusting occasion of High Pressure Difference, due to very large dynamic torque phenomenon being arranged, be all to rely on the size that improves actuator to meet the adjusting requirement under High Pressure Difference usually, can increase like this complete machine cost of valve.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thereby a kind of three eccentric metal seal butterfly valve is provided, change the basic structure of three bias, both met above working condition requirement, reduced again the complete machine cost, also extended the working life of valve simultaneously.
According to technological scheme provided by the invention, 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, matrix liner, filler, filler pressing sleeve, Gland; Described Gland is fastened on valve body; Described bottom is fastened on the valve body bottom; Feature is: described valve rod and valve plate adopt key pin to be mounted in valve body, the 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 seal by the valve seal packing ring, with monolateral porous trim ring and valve body trim ring, compress, 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 the second metal bearing, spacing semicircular ring, thrust pad, pad are equipped with in described valve rod top and the bottom, between described the second metal bearing and spacing semicircular ring, are provided with thrust pad and pad; Limiting board is fastened on described valve rod bottom with stop screw, and stop screw prevents that 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, described principle of hollow metal O-ring has some selfsealings hole on the outside.
As improvement of the present invention, described monolateral porous trim ring is provided with several holes.
As improvement of the present invention, on described the first metal bearing and the second metal bearing, be hatch frame.
As improvement of the present invention, be provided with the bottom packing ring between described bottom and valve body.
As improvement of the present invention, be provided with pin on described valve rod, and offer keyway.
Compared with the prior art the present invention has following technical characterstic:
1, monolateral porous ring pressing construction design, use special ring pressing construction, utilize the flow principles of medium, the huge eddy current that the High Pressure Difference medium produces through reverse valve plate side flows out through the porous of trim ring, a large amount of like this energy has all been diluted by porous, has greatly reduced valve plate pressure reduction herein, thereby has reduced valve plate dynamic torque herein, and then reduced the size of actuator, reduce cost and guaranteed to greatest extent safe operation.
2, be placed on the principle of hollow metal O-ring structure below valve plate sealing ring, met well the seal request under the high-temperature and high-pressure conditions, the less end-face friction of O shape circle is guaranteed floatability and the automatic centering performance of seal ring simultaneously, avoided using the winding packing ring not only to need very large pretightening force, once and phenomenon that just can't be unsteady after pretension, meet better the seal request under high temperature condition.Divided by upper outside, also in the outside of O shape circle, beaten a lot of selfsealings hole, pressure medium enters in the hole of O shape circle, produces self-packing effect.When temperature is spent over 500, also select targetedly inner inflatable shape O shape coil structures, under high temperature, the expansion of gas has strengthened seal ring elasticity at high temperature, has guaranteed sealing effect.There is certain elasticity because relatively be wound around point, so can be in the situation that do not change the requirement that actuator meets two way sealed.
3, the opening design bearing has been guaranteed coordinating of high temperature lower bearing and axle on the one hand, also avoids on the other hand stuck phenomenon at high temperature, because enough spaces are left to expansion in the gap of opening.
4, anti-the blowing out in design of valve rod moved, and uses spacing semicircular ring to prevent that valve rod from moving down, and utilizes the stop screw restriction valve rod of stem bottom to move up simultaneously.These are different in the design of stem bottom with traditional semicircular ring, have reduced the distance of semicircular ring and valve plate end, have avoided under high-temperature condition, and the thermal expansion of the length direction of whole valve rod causes the semicircular ring of bottom not have the space of expanding to cause stuck phenomenon; Thereby more be applicable to the application under the high temperature occasion.
5, independent seal ring structure is set in valve body, interchangeability improves on the one hand, has also reduced on the other hand manufacture difficulty, has avoided carrying out the 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, thereby guaranteed the thermal expansion surplus, avoid rising extremely at high temperature.
6, the upper key downside pin design be connected with valve plate by valve rod, avoid the different pin caused of valve rod and valve plate thermal expansion to cut off phenomenon, thereby more be applicable to using under high temperature.
The 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 monolateral porous ring pressing construction of the present invention schematic diagram.
Fig. 4 is metal bearing hatch frame schematic diagram of the present invention.
Fig. 5 is the anti-structure I cross section view that blows out 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
Following the present invention is further described in connection with the embodiment in accompanying drawing:
As Figure 1-Figure 5, comprise valve body 1; 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); The first metal bearing 61, the 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 is arranged in valve body 1 with adopting pin structure under upper key being connected of valve plate 2, after processing, valve seal ring 5 is arranged in valve body 1, with valve body 1, by valve seal packing ring 35, seal, with monolateral porous trim ring 14 and valve body trim ring 9, compress, described valve body trim ring 9 use hexagon socket cap head screws 52 are pressed on valve body 1, valve plate trim ring 10 use hexagon socket cap head screws 51 are pressed on valve body 1, described valve plate sealing ring 4 is arranged in valve plate 2, 2 of described valve plate sealing ring 4 and valve plates are provided with gap, described gap enters in principle of hollow metal O-ring 17 grooves, described genus hollow O shape is enclosed 17 outsides and is had aperture.Be disposed with Bearing washer 16, the first metal bearing 61, matrix liner 34, filler 31, filler pressing sleeve 32, Gland 33 on described valve rod 3; Described Gland 33 is by stud 56; Hexagon nut 57 is fastened on valve body 1.Be equipped with on described valve rod 3 between described the second metal bearing 62, spacing semicircular ring 8, thrust pad 12, pad 13, the second metal bearings 62 and spacing semicircular ring 8 and be provided with thrust pad 12 and pad 13; With stop screw 53, limiting board 15 is fastened on to described valve rod 3 bottoms, stop screw 53 prevents that valve rod 3 from moving up; Be provided with bottom packing ring 36 between bottom 11 and valve body 1, described bottom 11 use hexagon head bolts 54, spring washer 55 are fastened on valve body 1 bottom.Be provided with pin 7 on described valve rod 3, and offer keyway 58.Described the 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, the High Pressure Difference medium after reverse valve plate, can form an eddy current in the back of valve plate, if there is no this porous trim ring in valve plate 2 bottoms of Fig. 2, all the pressure drop meeting acts on valve plate, valve plate need to bear very large moment of torsion, if want to allow valve plate fix, needs very large actuator's moment of torsion.Porous on this special ring pressing construction can be resisted most pressure drop now, thereby the pressure drop of bearing on valve plate reduces, thereby has reduced actuator's moment of torsion.Thereby reduced moment of torsion when the poor medium of handle high voltages is regulated.
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 grooves through valve plate sealing ring 4 and the gap of valve plate 2, thereby enter into outside and open foraminate principle of hollow metal O-ring 17 inside, produce the selfsealings effect by pressure medium, pressure is higher, and sealability is better.And valve plate sealing ring 4 internal diameters and valve plate 2 have clearance for expansion, prevent under high temperature stuckly, due to principle of hollow metal O-ring 17, to have pretightening force little, the characteristics such as the end-face friction coefficient is little, therefore the position of valve plate sealing ring 4 changes a little, can automatic and valve seal ring 5 adaptations.This structure is particularly suitable for high temperature, high pressure operating mode.
As shown in Fig. 1, Fig. 4, in the present invention, the first metal bearing 61, the second metal bearing 62 are designed to hatch frame, adapt to so better the expansion requirement of high temperature, make under high-temperature expansion and have enough gaps to be expanded, and have avoided the dead phenomenon that rises under high temperature.
As shown in Fig. 5, Fig. 1, in the present invention, anti-the blowing out in design of valve rod 3 moves on to valve plate 2 sides, so just reduced valve rod 3 to the distance between spacing semicircular ring 8, reduced the diametric swell increment of valve rod 3, thus excessive valve rod 3 and the bottom 11 dead risk that rises that causes of swell increment while having avoided spacing semicircular ring 8 to be placed on valve rod 3 bottom.Spacing semicircular ring 8 is placed on to top, and valve rod 3 can not move down, and following stop screw 53 prevents that valve rod 3 from moving up.This structural design, thus more be applicable to the application under the high temperature occasion.
As shown in Fig. 1, Fig. 6, have 2 seal rings in the present invention, one is valve seal ring 5, another is valve plate sealing ring 4, valve seal ring 5 is used special-purpose fixture to process the rear valve body 1 of putting into separately, seal 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 just can not loose again.The floating seal of valve is to complete by the unsteady of valve plate sealing ring 4.This structure has very strong interchangeability, once valve seal ring 5 damages, changes a new seal ring and can use.And retaining certain expansion gap between valve seal ring 5 and valve body, the material capable of choosing multiple quality material of valve seal ring 5 is with the expansion requirement under reply high temperature.And in original valve body, pile-up welding hard alloy, as seal ring, once manufacture cost is high and damage be difficult to maintenance, and can't select other materials and valve plate sealing ring 4 couplings, therefore is difficult to adaptation superhigh temperature operating mode.
As shown in Figure 1, as can be seen from Figure 1, in the present invention, being connected of valve rod 3 and valve plate 2 adopts pin structure under upper key, and the pin while having avoided the thermal expansion of high-temperature expansion lower valve rod and valve plate inconsistent is 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 can adopt the stream open form to be tested to check the two way sealed performance.
In the present invention, be in the situation that dependence on import three eccentric butterfly valve and a kind of new structure three eccentric butterfly valve of proposing for a long time under the harsh operating modes such as High Pressure Difference, high temperature, two way sealed, can meet well on-the-spot usage requirement by novel structural design, having overcome 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, substituted import fully.
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, make the problem of original appearance thoroughly eliminate, fundamentally solve the problem existed, both meet usage requirement, extended working life again.
Claims (8)
1. a three eccentric metal seal butterfly valve, comprise 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); Described bottom (11) is fastened on valve body (1) bottom; It is characterized in that: described valve rod (3) adopts key pin to be mounted in valve body (1) with valve plate (2), 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) seals by valve seal packing ring (35) with valve body (1), with monolateral porous trim ring (14) and valve body trim ring (9), compress, described 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); Described the second metal bearing (62), spacing semicircular ring (8), thrust pad (12), pad (13) are equipped with in described valve rod (3) top and the bottom, are provided with thrust pad (12) and pad (13) between described the second metal bearing (62) and spacing semicircular ring (8); Limiting board (15) is fastened on described valve rod (3) bottom with stop screw (53), and stop screw (53) prevents that 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: between described valve plate sealing ring (4) and valve plate (2), be provided with gap.
3. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: on outside described principle of hollow metal O-ring (17), have some selfsealings hole.
4. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, it 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, it is characterized in that: described the 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: between described bottom (11) and valve body (1), be provided with bottom packing ring (36).
7. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: be provided with pin (7) on described valve rod (3).
8. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, is characterized in that: offer keyway (58) on described valve rod (3).
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 |
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| Publication Number | Publication Date |
|---|---|
| CN103470790A true CN103470790A (en) | 2013-12-25 |
| CN103470790B CN103470790B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310416740.9A Active CN103470790B (en) | 2013-09-12 | 2013-09-12 | Three eccentric metal seal butterfly valve |
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| Country | Link |
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| CN (1) | CN103470790B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329475A (en) * | 2014-11-04 | 2015-02-04 | 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 |
| 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 |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020130290A1 (en) * | 2000-12-02 | 2002-09-19 | Gerhard Oberbeck | Shut-off device with a swivellable butterfly valve and an entropy-elastic annular seal held on a backup ring |
| 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 |
-
2013
- 2013-09-12 CN CN201310416740.9A patent/CN103470790B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020130290A1 (en) * | 2000-12-02 | 2002-09-19 | Gerhard Oberbeck | Shut-off device with a swivellable butterfly valve and an entropy-elastic annular seal held on a backup ring |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329475A (en) * | 2014-11-04 | 2015-02-04 | 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 |
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| Publication number | Publication date |
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| CN103470790B (en) | 2015-08-26 |
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