CN102374298A - Valve core of butterfly valve - Google Patents
Valve core of butterfly valve Download PDFInfo
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- CN102374298A CN102374298A CN2011102439147A CN201110243914A CN102374298A CN 102374298 A CN102374298 A CN 102374298A CN 2011102439147 A CN2011102439147 A CN 2011102439147A CN 201110243914 A CN201110243914 A CN 201110243914A CN 102374298 A CN102374298 A CN 102374298A
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- NOQGZXFMHARMLW-UHFFFAOYSA-N Daminozide Chemical group CN(C)NC(=O)CCC(O)=O NOQGZXFMHARMLW-UHFFFAOYSA-N 0.000 claims description 35
- 239000012530 fluid Substances 0.000 description 21
- 230000008719 thickening Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 239000013585 weight reducing agent Substances 0.000 description 5
- 230000001815 facial effect Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Valve Housings (AREA)
Abstract
The present invention provides a valve core of a butterfly valve. The valve core has a lightweight wholly, an improved torque in operation, a dispersed stress in valve closing, and an improved strength. The valve core of a butterfly valve is a circular plate shaped valve core (1) with a boss portion (2) on the top and bottom, and is provided with a cylindrical section hexagon portion (3) in the central area of the boss portion (2), and section circular portions (4) are formed near valve rod embedding portions (8) on the top and bottom outside the section hexagon portion (3). At the same time, the valve wing portions (5) of the boss portion (2) and the valve core are connected via connection R portions (7), the connection R portions (7) are connected via gradually changing connection R portions (6) which become bigger from the top and bottom of the section circular portions (4) to the central portions (3b) of the section hexagon portion (3).
Description
Technical field
The present invention relates to the spool of butterfly valve, it is bigger especially to relate to bore, needs to be directed against the spool of the intensity of the fluid pressure when closing valve.
Background technique
Usually, the spool of butterfly valve is mounted freely on the valve rod in the main body that embeds flexible seat ring by rotation, and with the supported state of its diametric(al), rotation freely is assemblied in the main body.Through this assembling structure; When closing the stream of butterfly valve; Press than the big fluid of stream to be applied to spool, especially owing to be under the situation of about 125 grades, 150 grades of JIS 16K, 20K, ISO PN16, PN20, ASME at the for example bigger caliber size about 350-600A, nominal pressure, the area that receives the spool that fluid presses also increases; So, need guarantee the spool intensity of pressing to fluid.
In this case; Existence is through being installed in the situation of guaranteeing spool intensity on the spool with one-piece type valve rod with connecting, still since spend on the valve rod material cost at high price; And when the dismounting spool, produce the whole decomposition of valve; Necessity that spool and valve rod are pulled down, so, the assembling upkeep operation property variation of the replacing of spool, valve.
In addition, guarantee the situation of intensity though also considered the wall thickness of increase spool,, in this case, because the whole weight of spool increases, the change of operation moment of torsion is big, causes operability to reduce.
Therefore; Requirement can make the material cost of valve rod cheap through the distolateral structure up and down of being arranged to support with the valve rod of having cut apart spool; Guarantee on the basis of easy disassembling property of spool that through the plug valve rod one side is guaranteed the intensity of pressing to fluid, one side improves the spool of moment of torsion property.Through such spool being used for the valve of big caliber size,, improve operability guaranteeing to seek the lightweight of spool on the strong intensity based of pressing to fluid.
As this spool of cutting apart the butterfly valve of valve rod type, the spool of the centre type butterfly valve of known for example patent documentation 1.In the spool of the butterfly valve of the document 1, the boss part of valve rod insertion usefulness is formed on the bottom side, top of spool independently, is provided with integratedly and the roughly the same stiffening plate of two boss part width in the both sides of this spool.In this spool, through being set, stiffening plate strengthens boss part, and desire prevents the bending failure that causes because of fluid through this reinforcement.
As other structure of the spool of the intensity that is used to seek to improve boss part, known patent document 2 disclosed spools.This spool forms with the mode that the hexagonal boss part in cross section linked to each other with the end, top, strengthens spool by this boss part.Between the wing part of boss part and spool, form from outer circumferential side to the central position radius little camber line position uniformly.
Have again, in the spool of the butterfly valve of patent documentation 3, form the circular one-piece type boss that links to each other with the end, top in cross section, form skewed accumulation position from the wing part of side to about spool of this boss part.The alar part of this spool is divided into the conical shaped shape, and boss one-piece type at the bottom of the top by the cross section circle is strengthened whole with the wing part that is provided with the spool of piling up the position.
Reinforcement through such wing part improves other structure of the spool of integral intensity as desire, in patent documentation 4, is formed on a plurality of cross ribs that X-axis direction is extended, and desire improves the intensity of spool through this rib, and reduces the thickness of spool, seeks lightweight.
Technical paper formerly
Patent documentation
Patent documentation 1: model utility is logined communique No. 2523948
Patent documentation 2: No. 3026245 communique of patent
Patent documentation 3: model utility is logined communique No. 2596327
Patent documentation 4: No. 3676795 communique of patent
But,, strengthen under the situation of spool in the intensity that improves boss part; The spool of the butterfly valve of patent documentation 1 is owing to making the structure that is provided with as the stiffening plate of other parts, so weight increases; The operability variation; And part is wide in variety, and also increases the man-hour when making, and makes spended time.
Under the situation of the spool of the document 2, though desire through forming the intensity that improves boss part with the mode that links to each other with the end, top; Because the radius at the camber line position that the wing part of boss part and spool is connected diminishes; Connect to the camber line position of wing central part from the outer peripheral portion of spool by same radius, so, under the valve closed condition; With respect to the static load of the maximum working pressure of having loaded, stress concentrates on this camber line position.And; In this spool, though through adopting one-piece type boss at the bottom of hexagonal top, cross section to improve the intensity of boss part itself; Press to the wing part that is in a ratio of thin-walled with boss part by fluid and apply moment of flexure; Its result is that stress warp is easily concentrated the durability variation as the camber line position of the attachment portion of boss part and wing part.Though as this countermeasure, also considered to increase the wall thickness of wing part, if increase wall thickness, then the whole weight of spool increases moment of torsion property variation.
On the other hand, as the document 3, from boss part skewed accumulation position is being formed under the situation of wing part, because roughly the height of cone shape wing part increases, weight increases, moment of torsion property variation.And owing to pressing the stress that produces to have the tendency that diminishes along with the peripheral part that becomes wing part because of fluid, so near the accumulation position the outer circumferential side of wing part becomes waste at raising intensity this respect, weight also invalidly increases.
As the situation of the document 4, be provided with under the situation of rib at spool, the connection part that exists in this rib and wing part produces concentrated stress, because this concentrated stress produces the situation of strain in the part that does not form rib.Produced at spool under the situation of strain, produced plastic deformation, sealing reduction etc. produce harmful effect to durability.Spool is generally a lot of through the situation that cast form is made; Especially; If the spool more than medium caliber is provided with rib through cast form, then the wall thickness difference of the heavy section of spool and thinner wall section increases, and it is bad to be easy to generate casting; Along with valve port directly increases, the harmful effect that this wall thickness difference produces also increases.On the other hand, though also can have the spool of rib through the manufacturing of welding means,, in this case, the producibility variation, cost also improves, and therefore, is not general situation.
The present invention is for solving the invention that above-mentioned problem point is developed, and its purpose is, provides a kind of and can make whole lightweight, the moment of torsion property when seeking to improve the valve operation, and the stress when closing valve is disperseed, improve the spool of the butterfly valve of intensity.
Summary of the invention
To achieve these goals; First invention is a kind of spool of butterfly valve; It is the spool of the butterfly valve of the boss part at the bottom of the top that vertically is provided with discoideus spool continuously; Wherein, form the cross section hexagonal portion of barrel shape, near the valve rod embedding part at the bottom of the top beyond this cross section hexagonal portion, form the cross section rounded portions of barrel shape at the middle section of boss part; And the valve alar part of boss part and spool is continued with being connected R portion, and this connection R portion is continued to the gradual change R of big R from little connection R respectively by the central part that is configured to from twocouese cross section hexagonal portion at the bottom of the top of cross section rounded portions gradually.
Second invention is with the two sides of the hexagon of cross section hexagonal portion and the spool that line direction is adapted to the butterfly valve parallel with valve wing external diameter direction.
The 3rd invention is to connect the gradual change R of R portion to form from both sides at the bottom of the top of spool gradually from little R to big R, at the central part of spool, through connecting the overlapping of R portion, has formed the spool of the butterfly valve of peak portion.
The 4th invention is the spool of overhang that peak portion stretches out to valve wing external diameter direction about 40～45% the butterfly valve that is set in the spool radius.
The 5th invention is that the valve alar part is made cone shape, make spool face from center spool to two tilt, the spool of the butterfly valve that the stress that will apply to spool disperses.
The 6th invention is the spool of the butterfly valve of lower valve rod on the valve rod embedding part at the bottom of the top of boss part has been distinguished chimeric.
The invention effect
According to first invention,, near cross section hexagonal portion, the valve rod embedding part at the end, top, the cross section rounded portions is set through making middle section in boss part; The valve alar part usefulness of boss part and spool is had the structure that R continues that is connected of gradual change R, can make simply through cast form, and can not increase the part kind; Through utilizing the whole thin-walled property of this shape maintains; Seek lightweight, the moment of torsion property in the time of can improving the valve operation has again; Make the cross section rounded portions through producing the slight valve rod embedding part of stress, can seek further weight reduction.In this case, press the stress that causes to concentrate, stress is disperseed, can improve intensity, the sealing when guaranteeing to close valve through preventing the fluid when closing valve.Owing to when this spool is used for the valve of heavy caliber size, also can guarantee the intensity of spool, and reduce the operation moment of torsion; Improve operability, so, do not need the big actuator of exporting; Can move smoothly, can also carry small-sized actuator, make overall compactization.And, when driving valve, reduce through near the concavo-convex position the boss part, can also reduce near this position, the generation of the turbulent flow of second side, suppress the pressure loss few, seek to improve Flow characteristics.
According to second invention, parallel through the two sides of the hexagon of cross section hexagonal portion and line direction are adapted to valve wing external diameter direction, can the fluid resistance when driving valve be suppressed at inferior limit; And it is because through this parallel section that spool is horizontal easily; So when machining etc., stability (The わ り) is good; Kept by anchor clamps etc. easily, processing is simple.
According to the 3rd invention; Can the heavy wall of valve alar part be kept thin; Can make to make and disperse in the whole wide of valve alar part, and guarantee the spool of the light weight of spool intensity to close the valve state stress that produces on spool with respect to static load under the situation of maximum working pressure of having loaded.And, because the concavo-convex position that can further reduce spool through gradual change R, so, even under the situation of high viscosity fluid that flowed, also can reduce liquid holdup to spool.Through making the connection shape optimization of the connection R portion that this boss part is connected with the valve alar part, for example compare with spool with boss part that drum and top link to each other at the end, can also guarantee roughly equal intensity, and seek significantly weight reduction.
According to the 4th invention; Can set the balance that spool weight and stress disperse for the optimum state, can improve the two functional spool that forms simultaneously of sealing raising of the valve that produces in the raising of the operability of guaranteeing to produce with because of the intensity of spool because of light moment of torsion.
According to the 5th invention, can strengthen integral body, the stress that applies to spool is disperseed, improve intensity, in addition,, can seek to alleviate whole weight especially through near the thickness the insertion position of cutting down valve rod more.
According to the 6th invention, through being arranged to use the last lower valve rod of separation, spool is fixed on the structure on the valve body, compare with the structure that uses one-piece type valve rod, can cut down the materials used of valve rod, implement the replacing of spool etc. easily.
Description of drawings
Fig. 1 is the approximate three-dimensional map of mode of execution of the spool of the butterfly valve of expression among the present invention.
Fig. 2 is the front view of Fig. 1.
Fig. 3 is the plan view of Fig. 2.
Fig. 4 is that sectional elevation is omitted in the part of spool.(a) be the part omission sectional elevation of the spool of the butterfly valve among the present invention.(b) be that sectional elevation is omitted in the part of the relatively spool in the article.
Fig. 5 is the major component explanatory drawing of spool.(a) be the major component explanatory drawing of the spool of the butterfly valve among the present invention.(b) be the major component explanatory drawing of the spool in the article relatively.
Fig. 6 is the stereogram of mode of execution of the spool of the butterfly valve of expression among the present invention.
Fig. 7 is the sectional view of Fig. 2.(a) be D-D line sectional view.(b) be E-E line sectional view.(c) be F-F line sectional view.
Embodiment
Below, according to accompanying drawing, specify the preferred implementation of the spool of the butterfly valve among the present invention.Among Fig. 1, the stereogram of the spool of the butterfly valve among expression the present invention, among Fig. 2, the plan view of presentation graphs 1, among Fig. 3, the plan view of presentation graphs 2.Among Fig. 6, represent the more detailed stereogram of the spool of butterfly valve of the present invention.
As shown in the figure; The spool 1 of the butterfly valve among the present invention is formed discoideus; Be boss part 2 from pushing up the end in the shape that vertically is provided with continuously; In cross section hexagonal portion 3, the cross section rounded portions 4 of these boss part 2 formation barrel shape, and the valve alar part 5 of this boss part 2 and spool 1 is continued by the R portion 7 that is connected with gradual change R6.
In the spool 1 of above-mentioned butterfly valve, end direction is provided with through hole 9 on the top in boss part 2, forms cross section hexagonal portion 3 at the middle section T of boss part 2.Be two facial 3a's that are hexagon in the cross section hexagonal portion 3 and the state that sets abreast of line direction and valve wing external diameter direction, in view of the above, two parallel facial 3a be when closing valve and the not shown stream quadrature that goes out towards.Though hoping cross section hexagonal portion 3 is regular hexagon shapes; But, also can be the hexagon shape beyond the regular hexagon shape, have again; Also can form the shape beyond the hexagonal portion of cross section, for example cross section Octagon portion, uniform section polygonal portion of cross section decagonal portion at the middle section T of spool 1.
Cross section rounded portions 4 by barrel shape be formed near the valve rod embedding part 8 at the bottom of the top beyond the cross section hexagonal portion 3, be connected with cross section hexagonal portion 3 by level and smooth curved face part 10.Edge portion at valve rod embedding part 8 forms ring valve seat surface 15, and the end of cross section rounded portions 4 forms roughly coniform towards this ring valve seat surface 15.Rounded portions 4 forms the situation at the profile position of straight line shape by curved face part 10 to the cross section because there is not from cross section hexagonal portion 3 in cross section rounded portions 4, so the flow path resistance when driving valve is lowered.
Valve alar part 5 is arranged on the both sides of boss part 2 roughly discoideusly, and when rotary manipulation spool 1, this valve alar part 5 can contact the feather valve seat ring that leaves the not shown butterfly valve that goes out, and carries out the switching of stream.This valve alar part 5 is formed cone shape, and the facial 5a of spool table mind-set both sides from spool 1 are tilted, and the stress that applies to spool 1 is disperseed.
Among Fig. 7, above-mentioned boss part 2 continues by being connected R portion 7 with valve alar part 5.Connect R portion 7 and have gradual change R6, this gradual change R6 is the shape that is configured to from the central part 3b of twocouese cross section hexagonal portion 3 at the bottom of the top of cross section rounded portions 4 from little connection R gradually big R.That is, the camber line size of the gradual change R6b of the gradual change R6a of Fig. 7 (a), Fig. 7 (b), the gradual change R6c of Fig. 7 (c) is the relation of gradual change R6a＜gradual change R6b＜gradual change R6c, and gradual change R6 is configured to have the curved surface that central part to spool 1 becomes big radius gradually.In this case, for example can make when the camber line of gradual change R6a is of a size of 16mm, the camber line of gradual change R6c is of a size of the shape of the gradual change R6 of the such relation of 90mm.Form the overlapping peak portion 11 that produces of the connection R portion 7 that forms respectively because of end direction from the top at the central part 3b of spool 1.
Like Fig. 1, shown in Figure 2, also can set the overhang W of peak portion 11 when the external diameter direction of valve alar part 5 is stretched out about 40～45% of spool radius L for.In addition, last lower valve rod 12,13 near the chimeric cross section rounded portions 4, under the light-weighted situation of paying attention to spool 1, hope to make the height that connects R portion 7 for minimum.
In Fig. 1; Express the boundary line respectively at the boss part 2 and the boundary vicinity of valve alar part 5, cross section hexagonal portion 3 and cross section rounded portions 4; As shown in Figure 6, boss part 2 is with valve alar part 5 and be connected R portion 7, cross section hexagonal portion 3 and cross section rounded portions 4 and be connected smoothly by curved face part 10 but in fact.
Though not shownly go out; The spool that spool 1 can be used as the butterfly valve of general structure uses; For example, in the last lower valve rod 12,13 of Fig. 6 is fixed on the valve body that embeds flexible seat ring, be entrenched in the valve rod embedding part 8 of the inboard of the upper end side (top side) that is formed at boss part 2 through the upper valve rod 12 that will project to upper side; Lower valve rod 13 is entrenched in the valve rod embedding part 8 of the inboard of lower end side (bottom side) boss part that is formed at boss part 2, can rotates freely and be installed on the valve body.Have again, on upper valve rod 12, be installed with by from acting actuator or the control member that manually constitutes, can the spool Spin Control of butterfly valve be opened the valve degree to what stipulate by this control member automatic or manual with handle.The mounting construction of last lower valve rod 12,13 also can be opposite with above-mentioned structure.
Then, illustrate in greater detail near the spool middle section hexagonal portion 3 of above-mentioned butterfly valve shape.
Sectional elevation is omitted in the part of expression spool among Fig. 4, in order relatively to be directed against the intensity of the stress of valve body, has omitted the valve wing part.Among Fig. 4 (a); Sectional elevation is omitted in part in the cross section hexagonal portion 3 of the spool of the butterfly valve among expression the present invention; The part omission sectional elevation of the spool of the relatively article that expression is used for comparing with the present invention among Fig. 4 (b); At this relatively in the spool 20 of article, the cross section hexagonal portion 3 of the spool 1 of butterfly valve of the present invention suitable position form cylindrical part 21.And, with respect to the opposite side size A of the cross section hexagonal portion 3 of Fig. 4 (a), the outside dimension B of the cylindrical part 21 of Fig. 4 (b) is set equally.
In Fig. 4 (a), Fig. 4 (b); Intensity to the cross section hexagonal portion of making following situation 3 and cylindrical part 21 compares; Promptly; Will as the through hole 9 of the withdrawing pattern of inside part interior week circle 14 and interior week circle of through hole 22 23 be arranged to different internal diameters, make in these week circle 14 and the size in interior week round 23 be respectively internal diameter φ d
1, internal diameter φ d
2, the sectional area of the cross section hexagonal portion of representing with hacures 3 and the sectional area of cylindrical part 21 are equated.
Under the situation that the sectional area of cross section hexagonal portion 3 and cylindrical part 21 equates, cross section hexagonal portion 3 from central point O
1To leave farthest summit (position) apart from S
1Than cylindrical part 21 from central point O
2To the distance of leaving position farthest (length of=radius) S
2Long, the cross section to stretch out area big.Therefore, with regard to section factor and cross section secondary torque, cross section hexagonal portion 3 is bigger than cylindrical part 21, and at this moment, cross section hexagonal portion 3 goes out about about 10% greatly.Under the situation that is such identical sectional area (under=equiponderant situation); Because section factor can improve the rigidity of pressing to fluid more greatly more; And then; Under interior all circles 14 situation identical, can the rigidity of cross section hexagonal portion 3 be improved than cylindrical part 21 height with the sectional area in interior week round 23.
Therefore; The cross section hexagonal portion 3 of section factor that will be identical with above-mentioned cylindrical part 21 in desire is arranged under the situation of central part, can the sectional area of cross section hexagonal portion 3 is provided with littler, in view of the above; Constitute in the shape through cross section hexagonal portion 3 under the situation of central part 3b of spool 1; The situation that constitutes central part with shape through cylindrical part 21 is compared, and can access the rigidity of equal extent, and compare with the situation of this cylindrical part 21 can weight reduction.
For example, the opposite side size A of the cross section hexagonal portion 3 in making Fig. 4 (a) is 74mm, the diameter phi d in week round 14 in making
1Be φ 56mm, the outside dimension B that makes the cylindrical part 21 among Fig. 4 (b) is φ 74mm, the diameter phi d in interior week round 23
2Under the situation for 62mm, the sectional area of cross section hexagonal portion 3 is about 1723mm
2, the sectional area of cylindrical part 21 is about 1837mm
2, the sectional area of the sectional area ratio cylindrical part 21 of cross section hexagonal portion 3 is smaller.If more in this case section factor, then the smallest cross-sectional coefficient with respect to the not shown X axle (transverse axis) that goes out of cross section hexagonal portion 3 is about 29137mm
3, make the smallest cross-sectional coefficient with respect to the X axle of cylindrical part 21 be about 26735mm
3Even under the little situation of sectional area, the section factor of cross section hexagonal portion 3 is also than the section factor of cylindrical part 21 big about about 10%.
And, cross section hexagonal portion 3 made hexagon two facial 3a's and the structure that sets abreast of line direction and valve wing external diameter direction, so, can the fluid resistance when driving valve be suppressed at inferior limit, the butterfly valve of the Flow characteristics excellence in the time of can being arranged on out valve.
Then, the camber line portion 24 that continues to the spool 20 of the relatively article shown in the connection R portion 7 of spool 1, gradual change R6, Fig. 5 (b) compares.
Among Fig. 5, the major component explanatory drawing of expression spool, near the shape the cross section hexagonal portion 3 in the spool 1 of Fig. 5 (a) expression butterfly valve of the present invention, Fig. 5 (b) expression is near the sectional shape of the cylindrical part in the spool 20 in the article 21 relatively.
Shown in Fig. 5 (a), the curved surface of the secant-shaped that is continued in the conical surface position of the elongated surfaces of the hexagon of cross section hexagonal portion 3 and valve alar part 5 is to be connected R portion 7, connects R portion 7 at this and forms gradual change R6.On the other hand, shown in Fig. 5 (b), form the camber line portion 24 that continues of secant-shaped in the part that is continued in the conical surface position of cylindrical part 21 and valve alar part 26.
At this moment; If make the height C of valve alar part 5 and the height C ' of valve alar part 26 be identical size, then can make the thickening amount (sectional area of the dashed area shown in Fig. 5 (a)) of the thickening part α that is provided with through gradual change R6 bigger than the thickening amount (sectional area of the hachure part shown in Fig. 5 (b)) of the thickening part β that is provided with through the camber line portion 24 that continues.This is because forming gradual change R6 with identical camber line size in central cross-section, under the situation of the camber line portion 24 that continues, because the shape of cross section hexagonal portion 3 and cylindrical part 21 is different, can make the overhang W by gradual change R6 generation
1Than the overhang W that produces by the camber line portion 24 that continues
2Greatly.Its result does, the thickening amount that can form near the gradual change R6 the central part that makes in the spool 1 than around big connection R portion 7, in view of the above, can on the basis of strengthening spool 1, make favourable shape.
For example; If the height C of the valve alar part 5 when making caliber size among Fig. 5 (a) be 400A is 17.5mm; Make near the camber line of central part of gradual change R6 directly be R90mm; Making the opposite side size A of cross section hexagonal portion 3 is 74mm, then can be with near the overhang W to the external diameter direction of valve alar part 5 of the peak portion 11 of the gradual change R6 the cross section hexagonal portion 3
1Be set in about 81.8mm.Equally, if to make the height C ' of the valve alar part 26 among Fig. 5 (b) be 17.5mm, near the camber line the central part when having made gradual change and continuing camber line portion 24 is R90mm directly, makes the diameter phi d of cross section cylindrical part 21
2Be 74mm, then near the camber line portion 24 that continues the cross section cylindrical part 21 is to the overhang W of the external diameter direction of valve alar part 26
2For about 68.7mm.In view of the above, the thickening amount of the thickening part α of Fig. 5 (a) is bigger than the thickening amount of the thickening part β of Fig. 5 (b), and near the stiffening effect the central part improves, and spool intensity improves.
And, the overhang W under the situation of gradual change R6
1These both sides of direction are all big in the table of the external diameter direction of the valve alar part 5 of Fig. 5 (a) and spool 1, and spool 1 integral intensity also improves.If when forming gradual change R6, enlarge the width dimensions of hexagon part slightly, then can form the camber line size of gradual change R6 bigger, above-mentioned extension is stretched out to the external diameter direction of valve alar part 5, improve intensity more.
The overall dimensions of gradual change R6 is owing to there is boundary in the relation of the size of cross section hexagonal portion 3 and valve alar part 5, still, as the overhang W of the peak portion 11 of this gradual change R6, as stated, can be set in spool 1 radius about 40～45%.Under the situation of the size of setting gradual change R6,, then can reduce the cone height of valve alar part 5 if set the size of peak portion 11 greatly; But, make weight increase, on the other hand because the formation of gradual change R6 partly becomes greatly; If set the size of peak portion 11 little; Then can reduce the formation part of gradual change R6, but produce the big necessity of cone height that makes valve alar part 5, make weight increase.Under the situation of setting peak portion 11, gradual change R6, on the basis of considering these situation, can set for from little connection R gradually to the appropriate shape of big R.
On the other hand, near rounded portions 4 peripheries and valve alar part 5 in cross section are neighbouring because the stress generation of static load is slight, so; With compare near the central part 3b; Do not need intensity, at this moment, the internal diameter of the valve rod embedding part 8 of cross section rounded portions 4 is directly determined by the valve rod of last lower valve rod 12,13.Therefore, be arranged on the cross section rounded portions 4 with cross section hexagonal portion 3 same size degree through comparing this part that do not need intensity with central part 3b, can simultaneously keep intensity, one side reduces wall thickness, seeks weight reduction.Having, with regard to gradual change R6, also is same again; Because near the generation stress of the connection R portion 7 the cross section rounded portions 4 tails off, so, consider durability, sealing through one side; One side is arranged to little connection R with near the gradual change R6 the cross section rounded portions 4, can weight reduction.Its result does, forms greatly through near the gradual change R6 the central part 3b that stress is big, makes shape favourable aspect stress; Through by from the gradually little connection R of central part 3b, this gradual change R6 is set, can make spool 1 whole lightweight; And the stress when closing valve is disperseed, improve intensity.
Paying attention under the anterethic situation of spool lightweight and stress, can be being that maximum sized mode is set the size that connects R portion 7 with spool 1 position that end direction two is cut apart on the top.This spool 1 position that end direction two is cut apart on the top is being provided with above-mentioned peak portion 11; This peak portion 11 is because connection R portion 7 is an overall dimensions; So, become the shape of stretching out, through the shape of this peak portion 11 to outside diameter; Strengthen valve alar part 5 most effectively, the stress that produces at this valve alar part 5 is significantly disperseed to integral body.
Here, as sample, the size Expressing of the tip side when this sample for example is caliber size 400A and the gradual change R of center side is at table 1 with the spool of the butterfly valve among the present invention.For with spool of the present invention relatively, the camber line size of the camber line portion that necessarily continues of the spool of article relatively is also illustrated in the table 1.
Table 1
(unit: mm)
In the sample spool of the spool size 400A of table 1, the overhang of the center side of gradual change R for example hopes to be about 42% with respect to the ratio of the radius of this spool.
Then, the spool of putting down in writing through the above-mentioned table 1 of simulation subtend applies the fluid pressure, and the stress distribution when producing stress is analyzed.In this case, make the load (pressing the load that applies by fluid) that applies to spool be 1.6MPa, 1.8MPa, 2.0MPa, analyzed Mi Saisi stress distribution in this case, major principal stress (stretching) distribution.
The analysis result of these stress distribution is; The spool 1 (sample) of the butterfly valve among the present invention is because cross section hexagonal portion 3; Near the high central part 3b of section factor stress distribution is few; Owing to formed the global shape that connects R portion 7, stress from central part 3b to imposing on whole such result near the peripheral part.Because this situation is pressed the stress that produces to concentrate because of fluid and is difficult on spool 1, produce, can prevent to press mode plastic deformation because of fluid near the cross section hexagonal portion 3 with warpage, can guarantee the sealing that produces by spool 1.Have again since cross section rounded portions 4 near, with the peripheral end of the tight contact seal of seat ring of the not shown butterfly valve that goes out near, be not applied to stress basically and the load that produces, so, the maintenance effectively of sealing quilt.
On the other hand, applied under the situation that fluid presses at spool (relatively article) to boss part with the drum that links to each other at the end with the top and since fluid press concentrated central part neighbouring be shaped as cross section cylindrical part 21 cylindraceous; So near the section factor this is not enough, and owing to substitute the connection R portion with gradual change R; Form certain size; And the camber line portion 24 that continues that the radius at camber line position is little is so especially stress is concentrated easily near this central part.And owing to be the mounting construction that spool is supported by last lower valve rod, so the fluid of spool presses the first side that applies to be pushed by stem side, and supported, on the other hand, second side does not become the state that is supported by valve rod.Therefore, near the deflection the central part is bigger, because near the stress this central part is concentrated, the face with first side is that the center produces warpage, plastic deformation easily.In view of the above, for example, under the situation of the valve that this spool is used to comprise the bore about 350～600A of caliber size 400A,, be difficult to guarantee spool intensity, be difficult to keep sealing more because its compression area increases.
Set forth mode of execution of the present invention above in detail, but the present invention is not limited to the record of above-mentioned mode of execution, in the scope of the spirit of the invention that does not break away from claims of the present invention record, can carries out various changes.In view of the above; Can the sectional shape of the arc shape of the gradual change R in the outside dimension of the shape of cross section hexagonal portion, outside dimension, cross section rounded portions, length, the connection R portion, valve alar part, wall thickness etc. be arranged to appropriate specification, can desirable spool correspondingly be provided with the caliber size of butterfly valve, purposes etc.
Symbol description
1: spool; 2: boss part; 3: the cross section hexagonal portion; 3a: two faces; 3b: central part; 4: the cross section rounded portions; 5: the valve alar part; 5a: surface portion; 6: gradual change R; 7: connect R portion; 8: the valve rod embedding part; 11: peak portion; 12: upper valve rod; 13: lower valve rod; T: middle section; L: spool radius; W: overhang.
Claims (6)
1. the spool of a butterfly valve; It is the spool of the butterfly valve of the boss part at the bottom of the top that vertically is provided with discoideus spool continuously; It is characterized in that; Form the cross section hexagonal portion of barrel shape at the middle section of above-mentioned boss part; Near the valve rod embedding part at the bottom of the top beyond this cross section hexagonal portion, form the cross section rounded portions of barrel shape, and the valve alar part of above-mentioned boss part and above-mentioned spool is continued with being connected R portion, this connection R portion is continued to the gradual change R of big R from little connection R respectively by the central part that is configured to from the above-mentioned cross section of twocouese hexagonal portion at the bottom of the top of above-mentioned cross section rounded portions gradually.
2. the spool of butterfly valve as claimed in claim 1 is characterized in that, is adapted to the two sides and the line direction of the hexagon of above-mentioned cross section hexagonal portion parallel with valve wing external diameter direction.
3. according to claim 1 or claim 2 the spool of butterfly valve is characterized in that, the gradual change R of above-mentioned connection R portion forms from both sides at the bottom of the top of spool gradually from little R to big R, and at the central part of above-mentioned spool, overlapping through above-mentioned connection R portion formed peak portion.
4. the spool of butterfly valve as claimed in claim 3 is characterized in that, the overhang that above-mentioned peak portion stretches out to valve wing external diameter direction is set in about 40～45% of spool radius.
5. like the spool of each the described butterfly valve in the claim 1 to 4, it is characterized in that, above-mentioned valve alar part made cone shape, make spool face from center spool to two tilt, the stress that will apply to spool disperses.
6. like the spool of each the described butterfly valve in the claim 1 to 5, it is characterized in that lower valve rod on the valve rod embedding part at the bottom of the top of above-mentioned boss part has been distinguished chimeric.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010187596A JP5690526B2 (en) | 2010-08-24 | 2010-08-24 | Butterfly valve disc |
| JP2010-187596 | 2010-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102374298A true CN102374298A (en) | 2012-03-14 |
| CN102374298B CN102374298B (en) | 2015-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110243914.7A Active CN102374298B (en) | 2010-08-24 | 2011-08-24 | Valve core of butterfly valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5690526B2 (en) |
| CN (1) | CN102374298B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829198A (en) * | 2012-09-04 | 2012-12-19 | 西安交通大学 | Imitated shell type butterfly plate for butterfly valve |
| CN106574726A (en) * | 2014-02-21 | 2017-04-19 | Bs&B 创新有限公司 | Rotatable pressure relief valve assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654204A (en) * | 2012-04-19 | 2012-09-05 | 吴忠仪表有限责任公司 | Novel cam bending valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61193274U (en) * | 1985-05-24 | 1986-12-01 | ||
| CN1103470A (en) * | 1993-12-01 | 1995-06-07 | Okm株式会社 | Butterfly valve |
| CN201096201Y (en) * | 2007-04-13 | 2008-08-06 | 特变电工衡阳变压器有限公司 | Vacuum bias butterfly valve core blade structure with path below 80mm |
| JP2009121512A (en) * | 2007-11-12 | 2009-06-04 | Nippon Pneumatic Mfg Co Ltd | On-off valve for powder flow passage |
-
2010
- 2010-08-24 JP JP2010187596A patent/JP5690526B2/en active Active
-
2011
- 2011-08-24 CN CN201110243914.7A patent/CN102374298B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61193274U (en) * | 1985-05-24 | 1986-12-01 | ||
| CN1103470A (en) * | 1993-12-01 | 1995-06-07 | Okm株式会社 | Butterfly valve |
| CN201096201Y (en) * | 2007-04-13 | 2008-08-06 | 特变电工衡阳变压器有限公司 | Vacuum bias butterfly valve core blade structure with path below 80mm |
| JP2009121512A (en) * | 2007-11-12 | 2009-06-04 | Nippon Pneumatic Mfg Co Ltd | On-off valve for powder flow passage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829198A (en) * | 2012-09-04 | 2012-12-19 | 西安交通大学 | Imitated shell type butterfly plate for butterfly valve |
| CN106574726A (en) * | 2014-02-21 | 2017-04-19 | Bs&B 创新有限公司 | Rotatable pressure relief valve assembly |
| CN106574726B (en) * | 2014-02-21 | 2020-07-10 | Bs&B 创新有限公司 | Rotatable pressure relief valve assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102374298B (en) | 2015-07-22 |
| JP5690526B2 (en) | 2015-03-25 |
| JP2012047205A (en) | 2012-03-08 |
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Address after: Tokyo Patentee after: KITZ Corp. Address before: Chiba County, Japan Patentee before: KITZ Corp. |
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