CN201973255U - Four-eccentric butterfly valve - Google Patents
Four-eccentric butterfly valve Download PDFInfo
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- CN201973255U CN201973255U CN2011200907909U CN201120090790U CN201973255U CN 201973255 U CN201973255 U CN 201973255U CN 2011200907909 U CN2011200907909 U CN 2011200907909U CN 201120090790 U CN201120090790 U CN 201120090790U CN 201973255 U CN201973255 U CN 201973255U
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Abstract
The utility model discloses a four-eccentric butterfly valve. Extruding angles of dynamic and static sealing surfaces for the four-eccentric butterfly valve are smaller and no interfere is generated. The four-eccentric butterfly valve meets the requirements as follows: (1) alpha is larger than or equal to [(c+d)/2]-c/3; (2) theta is larger than or equal to 90 degrees and is less than or equal to 100 degrees, and omega is larger than or equal to 90 degrees and is less than or equal to 100 degrees, wherein theta is the angle MNO and the omega is the angle PQO; (3) an intersecting point K' of an angular bisector 5 between an extended line of a straight line MN and an extended line of a straight line QP with a Y shaft deviates from a foot point K formed by making a vertical line from the axis O of a valve plate rotating shaft 3 toward the Y shaft; (4) the whole edges of the top surface and the bottom surface of a valve plate 1 are cut away by chamfering; and the residual thickness of the valve plate 1 at the chamfering is c/5 to c/3; and (5) b is 0.01D to 0.08D. The butterfly valve solves the interference problem of the dynamic and static sealing surfaces and has the advantages of good sealing effect, small operating torque, wide selection range of valve plate thickness, uniform pressure on the sealing surfaces and the like.
Description
Technical field
The utility model relates to the metal hard-sealing eccentric-butterfly-valve, relates in particular to the valve seat of cutting sth. askew the circular cone valve plate and cooperating with this valve plate.
Background technique
Desirable hard seal butterfly valve should meet following three requirements: 1) in the movement process of valve plate before closing fully, any point all can not contact with the static seal face of valve seat, interferes otherwise promptly form; And after closing, the motive sealing face of valve plate must be fitted again fully with the static seal face of valve seat, and promptly the static and dynamic sealing face should be identical geometric surface.2) if the operation valve plate continues to move (promptly screwing valve plate) along closing direction, motive sealing face can apply small being pressed into to the static seal face in this process, producing enough seal pressures, otherwise can not seal well.3) to be preferably on the whole sealing surface be uniform to the amount of being pressed into that produced in the face of the static seal face of motive sealing.In order to satisfy above-mentioned requirements, hard seal butterfly valve has experienced continuous development.
Early stage butterfly valve does not adopt any eccentric design, and its static and dynamic sealing face adopts the sphere with the axle center rotation of valve plate rotating shaft, and the valve plate rotating shaft is on the geometrical center of valve plate.Therefore, this butterfly valve only can satisfy the 1st in the above-mentioned requirements).And, because the diameter range of valve plate rotating shaft is positioned in the static seal face of valve seat, therefore also must consider the sealing problem of the porose area of valve plate rotating shaft diameter range, increased the complexity of butterfly valve structure.
After this double eccentric butterfly valve has appearred.The static and dynamic sealing face of double eccentric butterfly valve still adopts the sphere with the axle center rotation of valve plate rotating shaft, but the axle center of its valve plate rotating shaft has not only been departed from the valve plate center line and (has promptly been produced first offset a), and departed from the runner center line (promptly producing the second offset b) of butterfly valve.The effect of the first offset a is that the diameter range of valve plate rotating shaft can be positioned at beyond the static seal face of valve seat.For this reason, the first offset a must be more than or equal to (c+d)/2 (valve plate thickness be c, and the diameter of valve plate rotating shaft is d).The effect of the second offset b is the degree of asymmetry that produces moving object and space, and motive sealing applies the small requirement that is pressed into towards the static seal face when screwing valve plate to satisfy.But the second offset b crosses conference and causes sealing surface pressurized inequality, and therefore the value of the second offset b can be determined by the even situation of sealing surface pressurized.Double eccentric butterfly valve can satisfy the 1st in the above-mentioned requirements)～2), and solved the upward necessary problem of considering the sealing of valve plate rotating shaft diameter range porose area of butterfly valve design without acceptance of persons.But, because the sealing surface of double eccentric butterfly valve still is a sphere, so there is certain difficulty in the processing of valve plate and valve seat.
Three eccentric butterfly valve thus has been born.Three eccentric butterfly valve is than double eccentric butterfly valve, on the basis that has kept the first offset a and the second offset b, the static seal face that is mated on motive sealing face on the valve plate and the valve seat is designed to the conical surface that is easy to process, and has therefore produced the 3rd eccentric angle α.Shown in Fig. 1～2, for specifying the structure of three eccentric butterfly valve, be that the runner center line 401 of Z axle, eccentric-butterfly-valve is a Y-axis, the straight line crossing Y-axis and Z axle intersection point and be parallel to valve plate rotating shaft 3 is that X-axis is set up system of coordinates now with valve plate center line 101, then the distance of the axle center O of valve plate rotating shaft 3 and Z axle is that (promptly first offset a) for a, the axle center O of valve plate rotating shaft 3 and the distance of Y-axis are b (i.e. the second offset b), valve plate 1 is c at the thickness of Y direction, the diameter of valve plate rotating shaft 3 is d, and the maximum diameter of hole of valve seat 2 is D (latus rectum that is butterfly valve is D).
As shown in Figure 1, if four end points with section YZ plane parallel and X=0 this valve plate 1 are made as M, N, Q and P respectively, then the length of straight line MQ promptly equals D; Simultaneously, owing to a bit all do circular motion arbitrarily on the valve plate 1 around the axle center of valve plate rotating shaft 3 O, make N and Q point on the valve plate 1 before closing, not produce interference with the corresponding line segment MN and the QP of static seal face, θ 〉=90 ° (establishing θ=∠ MNO) then must be arranged, ω 〉=90 ° (establishing ω=∠ PQO), thereby make the intersection point of the elongation line of the elongation line of straight line MN and straight line QP depart from Y-axis, form the 3rd eccentric angle α.Because the existence of the 3rd eccentric angle α, valve plate 1 must be the circular cone of cutting sth. askew.Obviously, the rotation of this circular cone of cutting sth. askew processing shaft axis is exactly the angular bisector 5 of the elongation line of the elongation line of straight line MN and straight line QP.The semi-cone angle β of the 3rd eccentric angle α and this circular cone of cutting sth. askew is the requisite processing parameter of this circular cone of cutting sth. askew of processing.
When the valve plate of design three eccentric butterfly valve, relate to choosing of six parameters altogether, the first promptly above-mentioned offset a, the second offset b, valve plate thickness c, the diameter d of valve plate rotating shaft, the 3rd eccentric angle α and semi-cone angle β at present.Wherein, parameter c determines that according to valve working pressure parameter d is determined by valve plate switch moment.Mention above, the effect of the first offset a is that the diameter range of valve plate rotating shaft can be positioned at beyond the static seal face of valve seat, and therefore the first offset a must be more than or equal to (c+d)/2; The effect of the second offset b satisfies that motive sealing applies the small requirement that is pressed into towards the static seal face when screwing valve plate, but the excessive sealing surface pressurized inequality that can cause again of the second offset b, therefore the value of the second offset b can be determined by the even situation of sealing surface pressurized.After roughly determining the value of parameter c, d, a, b, just relate to the problems of value of the 3rd eccentric angle α and semi-cone angle β.
Can find in conjunction with Fig. 1 once more, may be the reason that designs for convenience, artificer in the past directly be set in the intersection point of the angular bisector 5 of the elongation line of straight line MN and the elongation line of straight line QP and Y-axis axle center O from valve plate rotating shaft 3 on the intersection point k of vertical line that Y-axis is done.Like this, as long as determined position and selected parameter θ and the parameter alpha that M point and k order, shaft axis and N point and parameter beta are processed in the rotation of the circular cone that just can obtain cutting sth. askew.The position that M is ordered can be obtained by D/2; And the k point is the intersection point of the axle center O of valve plate rotating shaft 3 to vertical line that Y-axis is done, so can be obtained by parameter a; Though the section at X=0 during parameter θ 〉=90 ° does not produce interference, consider the extruding angle minimum of static and dynamic sealing face when θ=90 °, the extruding force of static and dynamic sealing face is just big more under the equal torque condition, therefore preferably θ is taken as 90 ° or be slightly larger than 90 °.At this moment, just only remaining having chosen to parameter alpha.
In fact, no matter how to select three eccentric angle α, all can not solve the interference problem of static and dynamic sealing face fully.This be because, situation shown in Figure 1 can only guarantee the static and dynamic sealing face with the section of YZ plane parallel and X=0 on do not produce interference, but can not make all and YZ plane parallel and | other sections of X| ≠ 0 all do not produce interference.At this moment, solve the interference problem of static and dynamic sealing face, have only parameter θ is increased to unacceptable degree, not only make the extruding angle of static and dynamic sealing face become very big, and cause valve plate 1 thin can not pressure-bearing.
Existing discovering adjusted parameter a, b, α and β and can be enlarged the scope that the static and dynamic sealing face does not interfere.Therefore, nearly all concentrating on of the parameters optimization research of finding three eccentric butterfly valve at present searched for a, b, α and β quadrinomial parameter aspect.Such as, being published on " fluid machinery " 2003 the 35th the 5th phase of volume, the author be proposition in the paper " three eccentric structure butterfly valve metal-seateds are interfered the geometry analysis " of Liang Rui etc., α should be 8 ° of 5 °～10 °, β ≈.And for example, in the utility model patent number " 02159988.2 ", utilize ANSYS software search optimum, its objective function is under the passive state, friction torque T minimum, and the parameter of the interference volume minimum of static and dynamic sealing face that Here it is in looking for the valve plate movement process cooperates.Yet paper proposed in " three eccentric structure butterfly valve metal-seateds are interfered the geometry analysis ", not may search when valve plate thickness c is big and satisfy not a, b, α and the β quadrinomial parameter of interference condition fully.
The model utility content
The utility model aims to provide four eccentric-butterfly-valves that a kind of extruding angle of static and dynamic sealing face is less and do not interfere.
This four eccentric-butterfly-valve comprises valve seat, valve plate and valve plate rotating shaft, described valve plate is the circular cone of cutting sth. askew, the conical surface of this circular cone of cutting sth. askew constitutes a pair of hard sealing pair as the static seal face that cooperates with it on motive sealing face and the valve seat, be the Z axle with the valve plate center line, the runner center line of eccentric-butterfly-valve is a Y-axis, the straight line of crossing Y-axis and Z axle intersection point and being parallel to the valve plate rotating shaft is in the system of coordinates set up of X-axis, the axle center O of valve plate rotating shaft and the distance of Z axle are a, the axle center O of valve plate rotating shaft and the distance of Y-axis are b, valve plate is c at the thickness of Y direction, the diameter of valve plate rotating shaft is d, the maximum diameter of hole of valve seat is D, if four end points with section YZ plane parallel and X=0 this valve plate are made as M respectively, N, Q and P, then the length of straight line MQ equals D, and the intersection point of the elongation line of the elongation line of straight line MN and straight line QP departs from Y-axis, and this circular cone eccentric-butterfly-valve of cutting sth. askew also satisfies: 1. a 〉=[(c+d)/2]-c/3; 2. 100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 °, wherein, " θ " is ∠ MNO, " ω " is ∠ PQO; 3. the intersection point k ' of angular bisector between the elongation line of the elongation line of straight line MN and straight line QP and Y-axis departs from from the axle center O of valve plate rotating shaft and has formed the 4th eccentric amount e to the intersection point k of vertical line that Y-axis is done; 4. prune by chamfering in the whole edge of valve plate end face and bottom surface, and the residual thickness of chamfering place valve plate is c/5～c/3; 5. b is 0.01D～0.08D.
Owing to satisfy the hands-off a of static and dynamic sealing face, b, α and β quadrinomial parameter when the thickness c of valve plate hour can find, therefore, the application's model utility people recognizes, can be pruned in the whole edge of valve plate end face and bottom surface earlier by the way of chamfering, its anti-effect of interfering is similar to the thickness c that reduces valve plate, but can guarantee the intensity of valve plate.On this basis, model utility people has carried out a large amount of research and discovery, determining parameter c according to valve working pressure, determine parameter d according to valve plate switch moment, and to make a 〉=[(c+d)/2]-c/3,100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 ° and b be under the situation of 0.01D～0.08D, if the residual thickness of chamfering place valve plate is arranged on this scope of c/5～c/3, just can solves the interference problem of static and dynamic sealing face.
In fact, can also bring following beneficial effect by the valve plate chamfering.At first, chamfering can make the line segment that seals between the static and dynamic sealing face shorten, and levels off to so-called " linear sealing ", to reach better sealing effect; Secondly, valve plate loses wedge angle after the chamfering, and the fluid by valve during valve opening can present streamline feature preferably; Also have, it is near near the valve plate center line by chamfering the line segment that seals between the static and dynamic sealing face to be received, so both can select the diameter of suitable overstriking valve plate rotating shaft that it can be born bigger bending moment, also can select simultaneously close to the valve plate center line with the valve plate rotating shaft, maximum is made as c/3 near distance, therefore, the scope of choosing of parameter a just can become a 〉=[(c+d)/2]-c/3 from original a 〉=[(c+d)/2], like this, parameter a can also be set at (c+d)/2＞a 〉=[(c+d)/2]-c/3, promptly compare and a in the past 〉=[(c+d)/2] situation, reduce the shared area in runner of valve plate and valve plate rotating shaft behind the valve opening, improved the flow behind the valve opening.
In technique scheme,, guaranteed extruding angle less between the static and dynamic sealing face simultaneously again because therefore 100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 ° can either guarantee not produce interference at the static and dynamic sealing face at the section of X=0.The extruding angle minimum of static and dynamic sealing face when θ=ω=90 °, the extruding force of static and dynamic sealing face is just big more under the therefore equal torque condition, thus the preferred θ=ω of the utility model=90 °.
In addition, the utility model also provides a kind of design method of the circular cone eccentric-butterfly-valve of cutting sth. askew.Four eccentric-butterfly-valves of the present utility model promptly obtain by this method is designed.Therefore, this method can be described as the design method of four eccentric eccentric-butterfly-valves again.This method has not only improved the design efficiency of the circular cone eccentric-butterfly-valve of cutting sth. askew greatly, and can design the extruding angle of static seal face less and do not interfere, the sealing surface pressurized is cut sth. askew the circular cone eccentric-butterfly-valve uniformly.It specifically comprises the steps:
(1) determines parameter c according to valve working pressure, determine parameter d, make a 〉=[(c+d)/2]-c/3,100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 ° then according to valve plate switch moment;
(2) pruned by chamfering in the whole edge of valve plate end face and bottom surface, the residual thickness that makes chamfering place valve plate is c/5～c/3;
(3) under the condition that above-mentioned parameter a, c, d, θ, ω and chamfering amount have been determined, the valve plate that satisfies that obtains by microcomputer modelling and simulation does not produce the axle center O and the Y-axis minimum value and value b of the valve plate rotating shaft of interfering requirement with valve seat
Min
(4) at b
MinThe basis on increase the value of parameter b, make when screwing valve plate motive sealing be pressed into area w in the face of what the static seal face produced in straight line MN place
1With produce in straight line QP place be pressed into area w
2Sum near valve plate with the YZ plane parallel and | be pressed into area w on the X| ≈ 0.97D/2 section
3, and then definite parameter b;
(5) make angular bisector between the elongation line of the elongation line of straight line MN and straight line QP, the intersection point k ' of itself and Y-axis departs from from the axle center O of valve plate rotating shaft and has formed the 4th eccentric amount e to the intersection point k of vertical line that Y-axis is done, and determines the 3rd eccentric angle α and semi-cone angle β then.
Do not rely on the value of the 3rd eccentric angle α and semi-cone angle β to determine the shape of valve plate in the design process of said method, but decide the shape of valve plate by definite parameter a, b, c, d, θ, ω.The whole design phase has only a parameter b need obtain by experiment that (by model utility people test of many times, the value of b parameter should be 0.01D～0.08D).Therefore, this method does not need intersection point with the angular bisector of the elongation line of the elongation line of straight line MN and straight line QP and Y-axis to be set in axle center O from the valve plate rotating shaft on the intersection point k of vertical line that Y-axis is done.
In fact, the angular bisector between the elongation line of straight line MN in the circular cone eccentric-butterfly-valve of cutting sth. askew that is obtained by the design of this method and the elongation line of straight line QP and the intersection point k ' of Y-axis will depart from the intersection point k to vertical line that Y-axis is done from the axle center O of valve plate rotating shaft, thereby form the 4th eccentric amount e.The value of the 4th eccentric amount e, the 3rd eccentric angle α and the semi-cone angle β of this moment all is to have passed through the data that calculate after the valve plate shape has designed again.Because the 3rd eccentric angle α and semi-cone angle β add necessary processing parameter in man-hour as valve plate, therefore must from the step (5) of said method, obtain.
In the said method, because the extruding angle minimum of the static and dynamic sealing face of the circular cone eccentric-butterfly-valve of designing when θ=ω=90 ° of cutting sth. askew, the extruding force of static and dynamic sealing face is just big more under the therefore equal torque condition, thus the preferred θ=ω of this method=90 °.
In the said method, because it is near near the valve plate center line that the chamfering of valve plate is received the line segment that seals between the static and dynamic sealing face, therefore preferably parameter a is set at (c+d)/2＞a 〉=[(c+d)/2]-c/3, promptly compare and parameter a was set at a 〉=[(c+d)/2] situation in the past, reduce the shared area in runner of valve plate and valve plate rotating shaft behind the valve opening, thereby improved the flow behind the valve opening.
The beneficial effects of the utility model are: design method of the present utility model can reduce the design difficulty of the circular cone eccentric-butterfly-valve of cutting sth. askew greatly, can be easy to obtain optimum design parameter, four designed eccentric-butterfly-valves have not only solved the interference problem of static and dynamic sealing face, and have that good sealing effect, operational torque are little, valve plate thickness range of choice big and the sealing surface pressure advantage of uniform, and behind the valve plate complete opening, because the valve plate after the chamfering has lost wedge angle, fluid presents streamline feature preferably, but noise reduction, falls resistance.
Description of drawings
Fig. 1 is the structural representation of existing three eccentric dish valves.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of the utility model four eccentric-butterfly-valves.
Fig. 4～Fig. 5 is respectively the partial enlarged drawing of valve plate upper and lower end among Fig. 3.
Fig. 6 is the utility model four eccentric-butterfly-valve design flow diagram.
Fig. 1 and Fig. 3 all be with the section of YZ plane parallel and X=0 on sectional view.
Be labeled as among the figure: the diameter of valve plate 1, valve plate center line 101, valve seat 2, valve plate rotating shaft 3, valve body 4, runner center line 401 angular bisectors 5, the first offset a, the second offset b, valve plate thickness c, valve plate rotating shaft is d, the 3rd eccentric angle α, semi-cone angle β, the 4th eccentric amount e, valve latus rectum D.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 3, this four eccentric-butterfly-valve satisfies: 1. a 〉=[(c+d)/2]-c/3; 2. 100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 °, wherein, " θ " is ∠ MNO, " ω " is ∠ PQO; 3. the intersection point k ' of the angular bisector between the elongation line of the elongation line of straight line MN and straight line QP 5 and Y-axis departs from from the axle center O of valve plate rotating shaft 3 and has formed the 4th eccentric amount e to the intersection point k of vertical line that Y-axis is done; 4. prune by chamfering in the whole edge of valve plate 1 end face and bottom surface, and the residual thickness of chamfering place valve plate 1 is c/5～c/3; 5. b is 0.01D～0.08D.
In the such scheme, because it is near near the valve plate center line that chamfering is received the line segment that seals between the static and dynamic sealing face, therefore can valve plate rotating shaft 3 is close to valve plate center line 101, maximum is made as c/3 near distance, so the diameter range of valve plate rotating shaft 3 still is positioned at beyond the static seal face of valve seat 2.At this moment, the scope of choosing of parameter a just can become a 〉=[(c+d)/2]-c/3 from original a 〉=[(c+d)/2].In the case, preferably parameter a is set at (c+d)/2＞a 〉=[(c+d)/2]-c/3, promptly compares with a in the past 〉=[(c+d)/2] situation has reduced the shared area in runner of valve plate and valve plate rotating shaft behind the valve opening, has improved the flow behind the valve opening.
In the such scheme,, guaranteed extruding angle less between the static and dynamic sealing face simultaneously again because therefore 100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 ° can either guarantee not produce interference at the static and dynamic sealing face at the section of X=0.The extruding angle minimum of static and dynamic sealing face when θ=ω=90 °, the extruding force of static and dynamic sealing face is just big more under the therefore equal torque condition, so preferred θ=ω=90 °.
In conjunction with shown in Figure 6, this four eccentric-butterfly-valve is obtained by following method design, the steps include:
(1) determines parameter c according to valve working pressure, determine parameter d according to valve plate switch moment, make a 〉=[(c+d)/2]-c/3,100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 ° then, wherein, parameter a preferably is set at (c+d)/2＞a 〉=[(c+d)/2]-c/3, and parameter θ, ω preferably are made as θ=ω=90 °;
(2) pruned by chamfering in the whole edge of valve plate 1 end face and bottom surface, the residual thickness (being " chamfering parameter " shown in Fig. 6) that makes chamfering place valve plate 1 is c/5～c/3; The residual thickness of chamfering place valve plate 1 is more little, just can not interfere more, and sealing effect is also good more, therefore, preferably the residual thickness of chamfering place valve plate 1 is made as c/5 herein;
(3) under the condition that parameter a, c, d, θ, ω and chamfering amount have been determined, the valve plate 1 that satisfies that obtains by microcomputer modelling and simulation does not produce axle center O and the Y-axis minimum value and value b that interferes the valve plate rotating shaft 3 that requires with valve seat 2
Min
(4) at b
MinThe basis on increase the value of parameter b, make when screwing valve plate 1 motive sealing be pressed into area w in the face of what the static seal face produced in straight line MN place
1With produce in straight line QP place be pressed into area w
2Sum near valve plate 1 with the YZ plane parallel and | be pressed into area w on the X| ≈ 0.97D/2 section
3, and then definite parameter b;
(5) make angular bisector 5 between the elongation line of the elongation line of straight line MN and straight line QP, the intersection point k ' of itself and Y-axis departs from from the axle center O of valve plate rotating shaft 3 and has formed the 4th eccentric amount e to the intersection point k of vertical line that Y-axis is done, and determines the 3rd eccentric angle α and semi-cone angle β then.
In the circular cone eccentric-butterfly-valve of cutting sth. askew that obtains by said method design, because the angular bisector 5 between the elongation line of the elongation line of straight line MN and straight line QP and the intersection point k ' of Y-axis depart from the intersection point k to vertical line that Y-axis is done from the axle center O of valve plate rotating shaft 3, so have formed the 4th eccentric amount e.Therefore, the circular cone eccentric-butterfly-valve of cutting sth. askew of the present utility model has had more an offset than three traditional eccentric dish valves, therefore can be described as four eccentric dish valves.
In the said method, the value of parameter b is at b
MinThe basis on increase and obtain because b
MinBe to satisfy valve plate 1 not produce the axle center O and the Y-axis minimum value and value of interfering the valve plate rotating shaft 3 that requires, so parameter b can make valve plate 1 and valve seat 2 not interfere equally with valve seat 2.
Said method is also with w
1With w
2Sum and w
3Between difference as weighing the inhomogeneity specific targets of static and dynamic sealing face pressurized.The utility model is thought, works as w
1+ w
2-w
3Value more little, then static and dynamic sealing face pressurized uniformity is high more.Therefore, when actual design, as long as guarantee w
1With w
2Sum is near w
3, just meet the uniform requirement of sealing surface pressurized.
Before this, the pressurized uniformity of estimating the static and dynamic sealing face often relies on artificer's subjective judgement, does not form the objective appraisal standard.The w that the utility model is set up
1+ w
2-w
3Can be used as the objective function in when design, this also is one of technical contribution of having done compared to existing technology of the utility model.
If the latus rectum D=600 of four eccentric-butterfly-valves obtains c=50mm, d=90mm according to force analysis, obtain a ≈ 50mm according to a=(c+d)/2-c/3 then.Get θ=ω=90 °, the chamfering parameter is got c/3 ≈ 17mm (residual thickness that is chamfering place valve plate 1 is about 17mm), utilizes microcomputer modelling and finds out b by experiment
Min≈ 6mm utilizes w1+w2-w3 as objective function, finds when b=8mm can make the value of w1+w2-w3 and roughly levels off to 0, at this moment b=0.013D.The design of valve plate 1 is finished thus.At this moment, can obtain the 4th eccentric distance e=75.84mm, the 3rd eccentric angle α=6.72 °, semi-cone angle β=16.34 ° are with the processing parameter as valve plate 1 and valve seat 2.Show that by the checking of the interference checking in the Three-dimensional Design Software static and dynamic sealing face of this circular cone eccentric-butterfly-valve of cutting sth. askew does not interfere fully.
Embodiment 2
On embodiment 1 basis, keep the value of parameter a, c, d, θ, ω constant, but continue to increase the value of parameter b, when b=45mm, the value of objective function w1+w2-w3 is in the upper limit of tolerance interval haply, at this moment b ≈ 0.08D.Like this, can obtain the 4th eccentric distance e=131.33mm, the 3rd eccentric angle α=3 °, semi-cone angle β=9 °.Show that by the checking of the interference checking in the Three-dimensional Design Software static and dynamic sealing face of this circular cone eccentric-butterfly-valve of cutting sth. askew does not interfere fully.
On embodiment 1 basis, keep the value of parameter a, b, c, d, θ, ω constant, the chamfering parameter is got c/5=10mm (residual thickness that is chamfering place valve plate 1 is about 10mm), because the residual thickness of chamfering place valve plate 1 is littler than embodiment 1, more level off between the static and dynamic sealing face " linear sealing ", so sealing effect is better.Show that by the checking of the interference checking in the Three-dimensional Design Software static and dynamic sealing face of this circular cone eccentric-butterfly-valve of cutting sth. askew does not interfere fully.
On embodiment 1 basis, keep the value of parameter a, b, c, d constant, get θ=ω=100 °.Like this, can obtain the 4th eccentric distance e=101.03mm, the 3rd eccentric angle α=15 °, semi-cone angle β=10 °.Show that by the checking of the interference checking in the Three-dimensional Design Software static and dynamic sealing face of this circular cone eccentric-butterfly-valve of cutting sth. askew does not interfere fully.
Claims (3)
1. four eccentric-butterfly-valves, comprise valve seat (2), valve plate (1) and valve plate rotating shaft (3), described valve plate (1) is the circular cone of cutting sth. askew, the conical surface of this circular cone of cutting sth. askew constitutes a pair of hard sealing pair as the static seal face that cooperates with it on motive sealing face and the valve seat (2), be the Z axle with valve plate center line (101), the runner center line (401) of eccentric-butterfly-valve is a Y-axis, the straight line of crossing Y-axis and Z axle intersection point and being parallel to valve plate rotating shaft (3) is in the system of coordinates set up of X-axis, the axle center O of valve plate rotating shaft (3) and the distance of Z axle are a, the axle center O of valve plate rotating shaft (3) and the distance of Y-axis are b, valve plate (1) is c at the thickness of Y direction, the diameter of valve plate rotating shaft (3) is d, the maximum diameter of hole of valve seat (2) is D, if four end points with section YZ plane parallel and X=0 this valve plate (1) are made as M respectively, N, Q and P, then the length of straight line MQ equals D, and the intersection point of the elongation line of the elongation line of straight line MN and straight line QP departs from Y-axis, it is characterized in that: 1. a 〉=[(c+d)/2]-c/3; 2. 100 ° 〉=θ 〉=90 °, 100 ° 〉=ω 〉=90 °, wherein, " θ " is ∠ MNO, " ω " is ∠ PQO; 3. the intersection point k ' of the angular bisector (5) between the elongation line of the elongation line of straight line MN and straight line QP and Y-axis departs from from the axle center O of valve plate rotating shaft (3) and has formed the 4th eccentric amount e to the intersection point k of vertical line that Y-axis is done; 4. prune by chamfering in the whole edge of valve plate (1) end face and bottom surface, and the residual thickness of chamfering place valve plate (1) is c/5～c/3; 5. b is 0.01D～0.08D.
2. four eccentric-butterfly-valves as claimed in claim 1 is characterized in that: θ=ω=90 °.
3. four eccentric-butterfly-valves as claimed in claim 1 is characterized in that: (c+d)/and 2＞a 〉=[(c+d)/2]-c/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200907909U CN201973255U (en) | 2011-03-31 | 2011-03-31 | Four-eccentric butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200907909U CN201973255U (en) | 2011-03-31 | 2011-03-31 | Four-eccentric butterfly valve |
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| CN201973255U true CN201973255U (en) | 2011-09-14 |
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| CN2011200907909U Expired - Lifetime CN201973255U (en) | 2011-03-31 | 2011-03-31 | Four-eccentric butterfly valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141156A (en) * | 2011-03-31 | 2011-08-03 | 西华大学 | Four eccentric butterfly valve and design method |
| CN103759027A (en) * | 2014-02-13 | 2014-04-30 | 江苏神通阀门股份有限公司 | Five-eccentric butterfly valve |
| CN104455623A (en) * | 2014-11-26 | 2015-03-25 | 苏州福润机械有限公司 | Two-way sealing butterfly valve |
| CN105003667A (en) * | 2015-07-07 | 2015-10-28 | 武汉策尔曼自动化设备有限公司 | Four-eccentricity butterfly valve |
| CN108302206A (en) * | 2013-12-25 | 2018-07-20 | 爱三工业株式会社 | Double eccentric valves |
| US20230332691A1 (en) * | 2020-12-10 | 2023-10-19 | Korea Unicom Valve Co., Ltd | Butterfly valve with quintuple offset structure |
-
2011
- 2011-03-31 CN CN2011200907909U patent/CN201973255U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141156A (en) * | 2011-03-31 | 2011-08-03 | 西华大学 | Four eccentric butterfly valve and design method |
| CN108302206A (en) * | 2013-12-25 | 2018-07-20 | 爱三工业株式会社 | Double eccentric valves |
| CN103759027A (en) * | 2014-02-13 | 2014-04-30 | 江苏神通阀门股份有限公司 | Five-eccentric butterfly valve |
| CN104455623A (en) * | 2014-11-26 | 2015-03-25 | 苏州福润机械有限公司 | Two-way sealing butterfly valve |
| CN105003667A (en) * | 2015-07-07 | 2015-10-28 | 武汉策尔曼自动化设备有限公司 | Four-eccentricity butterfly valve |
| US20230332691A1 (en) * | 2020-12-10 | 2023-10-19 | Korea Unicom Valve Co., Ltd | Butterfly valve with quintuple offset structure |
| EP4112976A4 (en) * | 2020-12-10 | 2023-11-29 | Korea Unicom Valve Co., Ltd | Butterfly valve with quintuple offset structure |
| US12092225B2 (en) * | 2020-12-10 | 2024-09-17 | Korea Unicom Valve Co., Ltd | Butterfly valve with quintuple offset structure |
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