CN201884682U - Triple eccentric regulating butterfly valve - Google Patents
Triple eccentric regulating butterfly valve Download PDFInfo
- Publication number
- CN201884682U CN201884682U CN2010206582037U CN201020658203U CN201884682U CN 201884682 U CN201884682 U CN 201884682U CN 2010206582037 U CN2010206582037 U CN 2010206582037U CN 201020658203 U CN201020658203 U CN 201020658203U CN 201884682 U CN201884682 U CN 201884682U
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- elastomer seal
- valve plate
- eccentric adjustment
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Abstract
The utility model relates to a triple eccentric regulating butterfly valve which comprises a valve body, a valve rod and a valve plate, wherein a valve seat is arranged in the valve body, the valve rod penetrates through the valve body and is connected with the valve plate, the valve plate comprises a valve plate body and a pressure plate which are fixedly connected, an elastic sealing part is arranged between the valve plate body and the pressure plate, and the outer peripheral surface of the elastic sealing part and the inner peripheral surface of the valve seat take the shape of oblique conical surfaces of which the vertex angles are equal. The triple eccentric regulating butterfly valve has good sealing property and no leakage, and is applicable to places with large caliber and high pressure difference.
Description
Technical field
The utility model relates to a kind of industrial process control valve, particularly a kind of three eccentric adjustment butterfly valves that are applicable to heavy caliber, High Pressure Difference.
Background technique
Last century the forties butterfly valve has appearred, it has advantages such as simple in structure, in light weight, that volume is little; Shortcomings such as but the structure at initial stage all is the open butterfly plate of axis turnover panel, and unbalance moment is big, poor stability, leakage class are low, thus can only be used for heavy caliber (more than the DN300), pressure reduction little, leak less demanding non-important place.
Because increasing, the various pipe diameter of monomer engineering of petrochemical enterprise constantly increases; The gas transmission oil transport pipeline constantly develops, and the scale of hydraulic engineering enlarges day by day, and the demand of heavy caliber control valve constantly increases.The straight journey control valve, the product more than the valves such as ball valve, bore DN300 is all very heavy, and the butterfly valve size is little, in light weight, so sales volume increases gradually.Under the promotion in market, the control valve MANUFACTURER is updated butterfly valve structure, in the product that last century, the eighties was introduced, back seat type butterfly valve has just appearred, two eccentric-butterfly-valves appearred afterwards, three eccentric butterfly valve has appearred after the nineties, adding the valve positioner function improves greatly, three big shortcomings such as the unbalance moment that has overcome butterfly valve basically is big, poor stability, leakage class are low, add that little, the lightweight advantage of its volume has become global advantage, so in the large bore valves field, three eccentric butterfly valve is first-selected product, other type product can't be competed with it; Home and abroad no matter now, the producer that produces butterfly valve is more and more, and bore is done bigger and bigger.
But there are several problems in the three eccentric hard seal butterfly valves of producing at present:
1, three common eccentric adjustment butterfly valves, its nominal pressure≤PN4.0MPa allows pressure reduction (Δ P)≤1.0MPa, and it is just quite difficult to surpass this scope, has placed restrictions on its using scope.
2, three eccentric butterfly valve commonly used all with metal seat valve to the metal valve plate, i.e. hard sealing structure, valve seat is directly processed on valve body, processes tilted conical surface with special fixture; The outer fenestra of metal valve plate is processed into tilted conical surface with special anchor clamps; When valve plate was closed, if size is desirable fully, two tilted conical surface contacts were a complete ellipse, leakage class can reach the V level, but add man-hour in actual machine, be difficult to reach perfect condition, particularly the heavy caliber valve, processing back amount of deformation is unpredictable, so leakage class often is the IV level, for reaching VI level leakage class, the valve seat of three eccentric butterfly valve and valve plate lining plastics or rubber, but by the reason of lining material, serviceability temperature, working pressure, pressure reduction all are restricted.
3, three eccentric butterfly valve commonly used, the axial unbalanced force of valve rod only heads on valve body by valve plate, causes wearing and tearing behind the long-play, and the conical surface seal line of valve plate and valve seat is subjected to displacement, and causes that at last valve plate is stuck.
4, three eccentric butterfly valve commonly used, when its valve plate was closed, the part conical surface was by interference and valve seat conical surface seal, so the very big moment of rotation of needs when throwing off; This rub-moment will account for more than 90% of resultant couple, so can not be used for the big place of pressure reduction.Therefore, lack a kind of three eccentric butterfly valve that is applicable to heavy caliber, High Pressure Difference place.
The model utility content
Problem to be solved in the utility model provides a kind of three eccentric adjustment butterfly valves, overcomes the above-mentioned problems in the prior art.
A kind of three eccentric adjustment butterfly valves of the present utility model, comprise valve body, valve rod and valve plate, be provided with valve seat in the valve body, valve rod is applied in the valve body and with valve plate and links to each other, described valve plate comprises fixedly connected valve plate body and pressing plate, between valve plate body and pressing plate, be provided with elastomer seal, and the outer circumferential face of elastomer seal is the identical tilted conical surface of drift angle with the inner peripheral surface of described valve seat.
Elastomer seal described in the utility model is the Sealing that multilayer Thin Stainless Steel plate holder expanded graphite constitutes.
Minimum place, the tilted conical surface inclination angle of elastomer seal described in the utility model is provided with straight pin.
The utility model also comprises the wrap style seal washer, is located between described elastomer seal and the described valve plate body.
The utility model is also comprising valve rod anti-channeling structure, is made up of thrust bearing pressing plate that is located at described valve stem end and the thrust bearing that is located at the valve body bottom.
Valve body described in the utility model upper end is provided with upper guide bush, and the lower end is provided with down guide pin bushing, and described valve rod is applied in the upper and lower guide pin bushing.
By above technological scheme, three eccentric regulating valves of the present utility model have the following advantages:
(1) valve plate adopts the assemblying body that valve plate body, pressing plate and elastomer seal constitute, wherein elastomer seal is the veneer of multilayer Stainless Sheet Steel horsestone China ink, have the advantages that to temper toughness with gentleness, can universally compress, remedy the morpheme error of sealing surface trace with this, on several roads graphite layer when valve cuts out in the tilted conical surface is pressed in the valve seat conical surface simultaneously, form multiple-sealed, so reach no levels of leakage.
(2) be provided with sealing between the elastomer seal of this valve plate and valve plate body, because of valve plate assembles with several parts, to compare with domestic three eccentric butterfly valve commonly used, this butterfly valve seals with the wrap style seal washer in a side of elastomer seal, medium can't side leakage, protects to levy to accomplish not have to leak.
(3) be beneficial to the location of elastomer seal, after the periphery of elastomer seal was processed into tilted conical surface, because cone angle all angles difference is beyond recognition in case just unload, a straight pin was made a call at minimum place, tilted conical surface inclination angle, strengthens interchangeability, is convenient to dismounting and keeps in repair.
Description of drawings
The structural drawing of Fig. 1 the utility model three eccentric regulating valves.
Fig. 2 is an A place enlarged view among Fig. 1.
The pneumatic three eccentric regulating valve structural drawing of Fig. 3.
Fig. 4 the utility model three eccentric regulating valves are closed the sealing schematic representation.
Embodiment
As shown in Figure 1, three eccentric adjustment butterfly valves of the present utility model, comprise valve body 6, valve rod 10 and valve plate 5, valve body 6 is provided with valve seat in the cylinder, be provided with upper guide bush 8 in the upper end portion of valve body, be provided with down guide pin bushing 9 in its underpart, the outside of upper guide bush 8 is filled with filler 12, valve rod 10 runs through whole valve body and in upper and lower guide pin bushing, links to each other with valve plate 5 by flat key 7.As shown in Figure 2, valve plate 5 comprises fixedly connected valve plate body 5A and pressing plate 5B, between valve plate body 5A and pressing plate 5B, be provided with elastomer seal 4, and the outer circumferential face of elastomer seal 4 is the identical tilted conical surface of drift angle with the inner peripheral surface of valve seat, elastomer seal 4 is the Sealing that multilayer Thin Stainless Steel plate holder expanded graphite constitutes, have the advantages that to temper toughness with gentleness, when valve plate is closed, elastomer seal has pliability, can universally compress, and remedies the morpheme error of sealing surface trace with this, on several roads graphite layer in the elastomer seal compresses in the valve seat conical surface simultaneously, form multiple-sealedly, medium can't seepage, so reach no levels of leakage.Between elastomer seal 4 and valve plate body 5A, be provided with wrap style sealing gasket 11, make medium leak into opposite side, guarantee to accomplish not have to leak from a side of elastomer seal.
Because of the working pressure height of this butterfly valve, valve rod is thicker, and silently an end produces very big outward thrust, and this power is all shifted onto on the filler by the valve rod shoulder, and filler can't bear, and causes valve rod, the outside play of valve plate.For preventing that the valve rod play from causing the wearing and tearing between valve plate and valve body, be provided with the valve rod anti-channeling structure that cooperatively interacts in the end and the valve body bottom of valve rod, this valve rod anti-channeling structure comprises thrust bearing pressing plate 2 that is located at valve stem end and the thrust bearing 3 that is located at the valve body bottom.Make thrust bearing pressing plate 2 with high-strength steel sheet, its diameter is fixed on the valve rod tail end greater than valve rod 10; Make thrust bearing 3 with wear-resisting steel plate, be fixed on the valve body lower valve sleeve shoulder; The thrust of medium will be delivered on the valve body by thrust bearing, prevents the valve rod play.Bottom at valve body 6 also is provided with bottom flange 1.
After the periphery of elastomer seal was processed into tilted conical surface, because cone angle all angles difference is beyond recognition in case just unload, a straight pin was made a call at minimum place, tilted conical surface inclination angle, strengthens interchangeability, is convenient to the dismounting maintenance.
As shown in Figure 3, instantiation for the utility model three eccentric adjustment butterfly valves, this three eccentric adjustment butterfly valve is used for pneumatic three eccentric adjustment butterfly valves, it comprises Pneumatic piston actuator 13, scaffold 14 and butterfly valve 15, the outputting power of Pneumatic piston actuator 13 passes to the valve rod 10 of butterfly valve 15, and valve rod 10 drives valve plate 5 motions.Different according to inside nominal diameter DN size and operating pressure differential, adapted different model Pneumatic piston actuator, that represent among Fig. 3 is DN350, Class600 butterfly valve 15, two cylinder diameters of adapted are D320 piston actuator 13, two piston rod while throw cranks produce huge torque drive valve rod rotation.The below of scaffold 14 dress butterfly valve 15, about two sides Pneumatic piston actuator 13 is installed, but annexes such as mounted valve positioning work piece, position limit switch, air-filtering decompressor also as required.Valve body and being connected of pipeline available wafer type or flange-type are seen Fig. 1, and valve seat is directly processed on valve interior wall, and sealing surface is a tilted conical surface.Valve plate adopts three eccentric structures, is made up of parts such as pressing plate, elastomer seal, valve plates, and the elastomer seal outer circumferential face processes tilted conical surface (the 3rd off-centre), and this tilted conical surface drift angle is identical with the tilted conical surface drift angle of valve seat, sees Fig. 2 and Fig. 4; Its angle value α avoids taking place self-locking greater than lock angle scope (3～6 °).At the High Pressure Difference operating mode, adopt the multilayer elastic Sealing, corrosion resistant plate is than thickening commonly used, but the number of plies of horsestone China ink is added 1～2 layer.Adopt the wrap style seal washer to seal between the side of elastomer seal and the valve plate body,, guarantee side seal with abundant bolt packing washer.
As shown in Figure 4, be that three eccentric regulating valve valve plates are closed substantially horizontal sectional view when sealing, sealing surface of seat is a tilted conical surface, its cone-apex angle α.Three off-centre in three eccentric regulating valves are exactly first the eccentric c among Fig. 4, second eccentric e and the 3rd eccentric angle θ, and three off-centre refer to three off-centre of the prior art.Among Fig. 4, top conical surface inclination angle maximum is used for blocking valve plate 5 when closing, and prevents that the valve plate corner from surpassing specified value; Following conical surface inclination angle minimum, the elastomer seal 4 of valve plate is adjacent to valve seat after being compressed by trace when closing.
Elastomer seal in the valve plate is commonly used thicker than domestic, and the graphite ply of paper of therebetween has more 1～2 layer, and corrosion resistant plate is also thickeied, in case valve closing, the moment of torsion of actuator is tightened to the embedding of valve plate Sealing in the conical surface of valve seat; Several roads graphite layer is pressed on the valve seat simultaneously, can be multiple-sealed, leak so can accomplish not have.In addition, elastomer seal only exposes the external circle 2～5mm of valve plate, has goodish rigidity and hardness, stands general media flow and washes away, and can stand very high pressure reduction.
Claims (6)
1. eccentric adjustment butterfly valve, comprise valve body (6), valve rod (10) and valve plate (5), valve body is provided with valve seat in (6), valve rod (10) is applied in the valve body (6) and with valve plate (5) and links to each other, it is characterized in that, described valve plate (5) comprises fixedly connected valve plate body (5A) and pressing plate (5B), is provided with elastomer seal (4) between valve plate body (5A) and pressing plate (5B), and the outer circumferential face of elastomer seal (4) is the identical tilted conical surface of drift angle with the inner peripheral surface of described valve seat.
2. three eccentric adjustment butterfly valves according to claim 1 is characterized in that, described elastomer seal (4) is the Sealing that multilayer Thin Stainless Steel plate holder expanded graphite constitutes.
3. three eccentric adjustment butterfly valves according to claim 2 is characterized in that, minimum place, the tilted conical surface inclination angle of described elastomer seal is provided with straight pin.
4. three eccentric adjustment butterfly valves according to claim 1 and 2 is characterized in that, also comprise wrap style seal washer (11), are located between described elastomer seal (4) and the described valve plate body (5A).
5. three eccentric adjustment butterfly valves according to claim 1 is characterized in that, also comprise valve rod anti-channeling structure, are made up of thrust bearing pressing plate (2) that is located at described valve stem end and the thrust bearing (3) that is located at valve body bottom.
6. three eccentric adjustment butterfly valves according to claim 1 is characterized in that, described valve body upper end is provided with upper guide bush (8), and the lower end is provided with down guide pin bushing (9), and described valve rod (10) is applied in the upper and lower guide pin bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206582037U CN201884682U (en) | 2010-12-14 | 2010-12-14 | Triple eccentric regulating butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206582037U CN201884682U (en) | 2010-12-14 | 2010-12-14 | Triple eccentric regulating butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201884682U true CN201884682U (en) | 2011-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206582037U Expired - Fee Related CN201884682U (en) | 2010-12-14 | 2010-12-14 | Triple eccentric regulating butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201884682U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016759A (en) * | 2012-11-30 | 2013-04-03 | 无锡智能自控工程股份有限公司 | Low-load type cut-off butterfly valve |
| CN106969155A (en) * | 2017-05-25 | 2017-07-21 | 五洲阀门股份有限公司 | A kind of high temperature butterfly valve door |
-
2010
- 2010-12-14 CN CN2010206582037U patent/CN201884682U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016759A (en) * | 2012-11-30 | 2013-04-03 | 无锡智能自控工程股份有限公司 | Low-load type cut-off butterfly valve |
| CN106969155A (en) * | 2017-05-25 | 2017-07-21 | 五洲阀门股份有限公司 | A kind of high temperature butterfly valve door |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20141214 |
|
| EXPY | Termination of patent right or utility model |