CN102374298B - Valve core of butterfly valve - Google Patents
Valve core of butterfly valve Download PDFInfo
- Publication number
- CN102374298B CN102374298B CN201110243914.7A CN201110243914A CN102374298B CN 102374298 B CN102374298 B CN 102374298B CN 201110243914 A CN201110243914 A CN 201110243914A CN 102374298 B CN102374298 B CN 102374298B
- Authority
- CN
- China
- Prior art keywords
- spool
- valve
- section
- cross
- mentioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008859 change Effects 0.000 claims description 45
- NOQGZXFMHARMLW-UHFFFAOYSA-N Daminozide Chemical group CN(C)NC(=O)CCC(O)=O NOQGZXFMHARMLW-UHFFFAOYSA-N 0.000 claims description 35
- 239000006185 dispersion Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 description 21
- 230000008719 thickening Effects 0.000 description 9
- 238000007789 sealing Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 5
- 239000013585 weight reducing agent Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000001815 facial effect Effects 0.000 description 3
- 210000003746 feather Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010010 raising Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000010276 construction 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
- 238000000034 method Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 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
- 239000012141 concentrate Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
- 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, especially relate to bore comparatively large, need the spool of the intensity for fluid pressure during valve closing.
Background technique
Usually, the spool of butterfly valve, by the valve rod be rotatably arranged in the main body being embedded with feather valve seat ring, with its diametric(al) by the state supported, is assemblied in main body rotatably mountedly.By this assembling structure, when closing the stream of butterfly valve, the fluid pressure larger than stream is applied to spool, especially due at the larger caliber size of such as about 350-600A, nominal pressure be JIS 16K, 20K, ISO PN16, PN20, ASME 125 grades, about 150 grades, the area being subject to the spool of fluid pressure also increases, so, need the spool intensity guaranteed for fluid pressure.
In this case, exist by being arranged on through for one-piece type valve rod situation spool being guaranteed spool intensity, but, owing to spending in the material cost high price on valve rod, and produce the decomposition of valve entirety when dismounting spool, by necessity that spool and valve rod are pulled down, so the replacing of spool, the assembling upkeep operation of valve are deteriorated.
In addition, although have also contemplated that the wall thickness increasing spool guarantees the situation of intensity, in this case, because the weight of spool entirety increases, operation moment of torsion becomes large, causes operability to reduce.
Therefore, requirement can make the material cost of valve rod cheap at the structure by being arranged to support with the valve rod split the side up and down of spool, guarantee on the basis of the easy disassembling of spool by plug valve rod, one side guarantees the intensity for fluid pressure, and one side improves the spool of moment of torsion.By such spool being used for the valve of large caliber size, on the basis of guaranteeing the strong intensity for fluid pressure, the lightweight of spool can also be sought, improving operability.
As the spool of the butterfly valve of this segmentation valve rod-type, the spool of the centre type butterfly valve of known such as patent documentation 1.In the spool of the butterfly valve of the document 1, the boss part that valve rod inserts is formed in the bottom side, top of spool independently, arranges the stiffening plate roughly the same with two boss part width integratedly in the both sides of this spool.In this spool, strengthen boss part by arranging stiffening plate, for being prevented the bending failure caused because of fluid by this reinforcement.
As other structure of the spool for seeking the intensity improving boss part, spool disclosed in known patent document 2.The mode that this spool is connected with the end, top with the hexagonal boss part in cross section forms, and strengthens spool by this boss part.Between boss part and the wing part of spool, formed from outer circumferential side to the little uniformly camber line position of central position radius.
Further, in the spool of the butterfly valve of patent documentation 3, Formation cross-section circle with the top one-piece type boss that is connected of the end, the wing part from the side of this boss part to the left and right of spool forms skewed accumulation position.The alar part of this spool is divided into roughly conical shape, and boss one-piece type at the bottom of the top by cross section circle is strengthened overall with the wing part being provided with the spool piling up position.
As other structure of the spool for being improved overall intensity by the reinforcement of such wing part, in patent documentation 4, be formed in multiple cross ribs that X-axis direction extends, for being improved the intensity of spool by this rib, and reduce the thickness of spool, seek lightweight.
At first technical paper
Patent documentation
Patent documentation 1: model utility logs in No. 2523948 publication
Patent documentation 2: patent No. 3026245 publication
Patent documentation 3: model utility logs in No. 2596327 publication
Patent documentation 4: patent No. 3676795 publication
But, improving the intensity of boss part, when strengthening spool, the spool of the butterfly valve of patent documentation 1 owing to making the structure of the stiffening plate be provided with as other parts, so, weight increase, operability is deteriorated, and part is wide in variety, and also increase man-hour when making, make spended time.
When the spool of the document 2, although for by form with the top mode that is connected of the end intensity improving boss part, but, because the radius at camber line position boss part be connected with the wing part of spool diminishes, connect from the outer peripheral portion of spool to wing central part by the camber line position of same radius, so, in a valve-closed state, the static load of maximum working pressure relative to load, stress concentrates on this camber line position.And, in this spool, although improve the intensity of boss part itself by adopting one-piece type boss at the bottom of hexagonal top, cross section, but, press to by fluid the wing part being in a ratio of thin-walled with boss part and apply moment of flexure, its result is, stress is easily concentrated through the camber line position of the attachment portion as boss part and wing part, and durability is deteriorated.Although as this countermeasure, have also contemplated that the wall thickness increasing wing part, if increase wall thickness, then the weight of spool entirety increases, and moment of torsion is deteriorated.
On the other hand, when skewed accumulation position being formed in wing part from boss part as the document 3, because the height of roughly cone shape wing part increases, weight increases, and moment of torsion is deteriorated.And, because because fluid pressure, the stress that produces has along with becoming the peripheral part of wing part and the tendency that diminishes, so the accumulation position near the outer circumferential side of wing part becomes waste improving intensity this respect, and weight also invalidly increases.
When arranging rib at spool the situation as the document 4, existing and producing concentrated stress at the connection part of this rib and wing part, because the part that this concentrated stress is not forming rib produces situation about straining.When spool creates strain, produce plastic deformation, sealing reduction etc. produce harmful effect to durability.The situation that spool is generally manufactured by cast form is a lot, especially, if the spool more than medium caliber arranges rib by cast form, then the heavy section of spool and the Wall-Thickness Difference of thinner wall section increase, easy generation casting is bad, along with valve port footpath increases, the harmful effect that this Wall-Thickness Difference produces also increases.On the other hand, although also can be had the spool of rib by the manufacture of welding means, in this case, producibility is deteriorated, and cost also improves, therefore, not general situation.
The present invention is the invention of developing for solving above-mentioned problem point, its object is to, provides one can make overall lightweight, seeks moment of torsion when improving valve operation, and stress dispersion when making valve closing, 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, at the spool being longitudinally provided with the butterfly valve of the boss part at the bottom of the top of discoideus spool continuously, wherein, the cross section hexagonal portion of barrel shape is formed at the middle section of boss part, the cross section rounded portions of barrel shape is formed near valve rod embedding part at the bottom of top beyond this cross section hexagonal portion, and boss part is continued with being connected R portion with the valve alar part of spool, this connection R portion is by being configured to continue to the gradual change R of large R gradually from little connection R respectively from the central part of twocouese cross section hexagonal portion at the bottom of the top of cross section rounded portions, and at the central part of above-mentioned spool, by the overlap in above-mentioned connection R portion, form peak portion, the overhang that above-mentioned peak portion stretches out to valve wing external diameter direction is set in 40 ~ 45% of spool radius.
Second invention is by the two sides of the hexagon of cross section hexagonal portion and line direction is arranged to the spool of the butterfly valve parallel with valve wing external diameter direction.
3rd invention is that valve alar part is made cone shape, and spool face is tilted from center spool to both sides, by the spool of the butterfly valve of stress dispersion applied to spool.
4th invention is the spool that the valve rod embedding part at the bottom of the top of boss part has been fitted together to the butterfly valve of lower valve rod respectively.
Invention effect
According to the first invention, by making the middle section in boss part, near cross section hexagonal portion, the valve rod embedding part at the end, top, cross section rounded portions is set, the valve alar part of boss part and spool is connected with what have a gradual change R the structure that R continues, can be made simply by cast form, and part kind can not be increased, by utilizing the thin-walled property of this shape maintains entirety, seek lightweight, moment of torsion during valve operation can be improved, further, by the valve rod embedding part producing stress slight is made cross section rounded portions, further weight reduction can be sought.In this case, by preventing the stress caused because of fluid pressure during valve closing from concentrating, making stress dispersion, can intensity be improved, guaranteeing sealing during valve closing.Due to when this spool is used for the valve of heavy caliber size, also can guarantee the intensity of spool, and reduce operation moment of torsion, improve operability, so, do not need the large actuator exported, can action smoothly be carried out, small-sized actuator can also be carried, make overall compact.And, when valve opening, reduced by the concavo-convex position near boss part, the generation of turbulent flow of this near sites, second side can also be reduced, the pressure loss is suppressed few, seeks raising Flow characteristics.And, can the heavy wall of valve alar part be kept thin, can make and the stress when producing on spool relative to static load when maximum working pressure with valve closing state load is disperseed at the broad spectrum of valve alar part entirety, and ensure that the spool of the light weight of spool intensity.And, owing to can be reduced the concavo-convex position of spool further by gradual change R, so, even when having flowed high viscosity fluid, the liquid holdup to spool also can be reduced.By making the connection shape optimization in the connection R portion this boss part be connected with valve alar part, such as compared with there is the spool of the boss part that drum was connected with the end, top, roughly equal intensity can also be guaranteed, and seek significantly weight reduction, the balance of spool weight and stress dispersion can be set to the optimum state, spool can be formed the functional of both sealing raisings of the raising guaranteeing the operability produced because of light moment of torsion and the valve produced because the intensity of spool improves simultaneously.
According to the second invention, by the two sides of the hexagon by cross section hexagonal portion and line direction is arranged to parallel with valve wing external diameter direction, fluid resistance during valve opening can be suppressed in inferior limit, and due to easily spool is horizontal by this parallel section, so when machining etc., stability (The わ り) is good, easily kept by fixture etc., processing is simple.
According to the 3rd invention, can entirety be strengthened, make the stress dispersion applied to spool, improve intensity, in addition, especially by the thickness of insertion near sites cutting down valve rod more, can seek to alleviate overall weight.
According to the 4th invention, by being arranged to use the upper lower valve rod be separated, spool being fixed on the structure on valve body, compared with using the structure of one-piece type valve rod, the use material of valve rod can being cut down, easily implementing the replacing etc. of spool.
Accompanying drawing explanation
Fig. 1 is the approximate three-dimensional map of the mode of execution of the spool of the butterfly valve represented in 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 local of spool.A () is that sectional elevation is omitted in the local of the spool of butterfly valve in the present invention.B () is that sectional elevation is omitted in the local of the spool compared in product.
Fig. 5 is the major component explanatory drawing of spool.A () is the major component explanatory drawing of the spool of butterfly valve in the present invention.B () is the major component explanatory drawing of the spool compared in product.
Fig. 6 is the stereogram of the mode of execution of the spool of the butterfly valve represented in the present invention.
Fig. 7 is the sectional view of Fig. 2.A () is D-D line sectional view.B () is E-E line sectional view.C () is F-F line sectional view.
Embodiment
Below, with reference to the accompanying drawings, the preferred implementation of the spool of the butterfly valve in the present invention is described in detail.In Fig. 1, represent the stereogram of the spool of the butterfly valve in the present invention, in Fig. 2, represent the plan view of Fig. 1, in Fig. 3, represent the plan view of Fig. 2.In 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 in the present invention is formed discoideus, in boss part, 2 from pushing up the end in the shape longitudinally arranged continuously, form cross section hexagonal portion 3, the cross section rounded portions 4 of barrel shape in this boss part 2, and the valve alar part 5 of this boss part 2 and spool 1 is continued by the connection R portion 7 with gradual change R6.
In the spool 1 of above-mentioned butterfly valve, in boss part 2, through hole 9 is set in top and bottom direction, becomes cross section hexagonal portion 3 in the middle section T-shaped of boss part 2.In in cross section hexagonal portion 3 the two facial 3a's in hexagon and the state that arranges abreast of line direction and valve wing external diameter direction, accordingly, the two facial 3a walked abreast be when valve closing orthogonal with not shown stream towards.Although wish that cross section hexagonal portion 3 is regular hexagon shapes, but, also can be the hexagon shape beyond regular hexagon shape, then have, also shape beyond the hexagonal portion of cross section, such as cross section Octagon portion, decagonal portion, cross section uniform section polygonal portion can be become in the middle section T-shaped of spool 1.
Cross section rounded portions 4 by barrel shape form beyond cross section hexagonal portion 3 at the bottom of top valve rod embedding part 8 near, be connected with cross section hexagonal portion 3 by level and smooth curved face part 10.Form ring valve seat surface 15 in the edge of valve rod embedding part 8, the end of cross section rounded portions 4 is formed as roughly coniform towards this ring valve seat surface 15.Because cross section rounded portions 4 does not exist the situation at the profile position being formed straight line shape from cross section hexagonal portion 3 to cross section rounded portions 4 by curved face part 10, so flow path resistance during valve opening is lowered.
Valve alar part 5 is by roughly discoideus the both sides being arranged on boss part 2, and when rotation process spool 1, this valve alar part 5 can contact the feather valve seat ring leaving not shown butterfly valve, carries out the opening and closing of stream.This valve alar part 5 is formed cone shape, spool table face 5a is tilted to both sides from the center of spool 1, makes the stress dispersion applied to spool 1.
In 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 in being 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 to the shape of large R.Namely, the camber line size of the gradual change R6c of gradual change R6b, Fig. 7 (c) of gradual change R6a, Fig. 7 (b) of Fig. 7 (a) is the relation of gradual change R6a< gradual change R6b< gradual change R6c, and the gradual change R6 central part being configured to have to spool 1 becomes the curved surface of large radius gradually.In this case, such as, 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.The overlap in connection R portion 7 because being formed respectively from top and bottom direction is formed and the peak portion 11 that produces at the central part 3b of spool 1.
As shown in Figure 1 and Figure 2, overhang W when also peak portion 11 can be stretched out to the external diameter direction of valve alar part 5 is set to about 40 ~ 45% of spool radius L.In addition, at upper lower valve rod 12,13 near the cross section rounded portions 4 that is fitted together to, in the light-weighted situation paying attention to spool 1, it is desirable to make the height in connection R portion 7 be minimum.
In FIG, boundary line is indicated respectively near the border of boss part 2 and valve alar part 5, cross section hexagonal portion 3 and cross section rounded portions 4, but in fact, as shown in Figure 6, boss part 2 with valve alar part 5 and be connected R portion 7, cross section hexagonal portion 3 is connected by curved face part 10 smoothly with cross section rounded portions 4.
Go out although not shown, the spool that spool 1 can be used as the butterfly valve of general structure uses, such as, through the upper lower valve rod 12,13 of Fig. 6 be fixed on be embedded with feather valve seat ring valve body in, by the upper valve rod 12 projecting to upper side being entrenched in the valve rod embedding part 8 of the inner side of the upper end side (top side) being formed at boss part 2, lower valve rod 13 is entrenched in the valve rod embedding part 8 of the inner side of lower end side (bottom side) boss part being formed at boss part 2, can is installed on valve body rotatably mountedly.Further, be installed with by the control member formed from acting actuator or manual handle on upper valve rod 12, by this control member automatic or manual, the Spool rotating of butterfly valve can be controlled to the valve opening degree of regulation.The mounting construction of upper lower valve rod 12,13 also can be contrary with above-mentioned structure.
Then, the shape near the spool middle section hexagonal portion 3 illustrating in greater detail above-mentioned butterfly valve.
Representing in Fig. 4 that sectional elevation is omitted in the local of spool, in order to compare the intensity of the stress for valve body, eliminating valve wing part.In Fig. 4 (a), represent that sectional elevation is omitted in the local in the cross section hexagonal portion 3 of the spool of the butterfly valve in the present invention, represent in Fig. 4 (b) and be used for omitting sectional elevation with the local of comparing the spool in product that the present invention compares, compare in the spool 20 of product at this, the position suitable in the cross section hexagonal portion 3 of the spool 1 of butterfly valve of the present invention forms cylindrical part 21.And, relative 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 equally set.
In Fig. 4 (a), Fig. 4 (b), the intensity of the cross section hexagonal portion 3 and cylindrical part 21 of making following situation is compared, namely, the inner circumferential circle 23 of the inner circumferential of the through hole 9 of the withdrawing pattern part as inside circle 14 and through hole 22 is arranged to different internal diameters, makes the size of these inner circumferentials circle 14 and inner circumferential circle 23 be respectively internal diameter φ d
1, internal diameter φ d
2, make the sectional area of the sectional area of the cross section hexagonal portion 3 represented with hacures and cylindrical part 21 equal.
When the sectional area of cross section hexagonal portion 3 and cylindrical part 21 is equal, cross section hexagonal portion 3 from central point O
1to the distance S of the summit left farthest (position)
1than cylindrical part 21 from central point O
2to distance (length of=radius) S of the position left farthest
2long, cross section to stretch out area large.Therefore, with regard to section factor and cross section secondary torque, cross section hexagonal portion 3 is larger than cylindrical part 21, and now, cross section hexagonal portion 3 goes out greatly about about 10%.When being (in=equiponderant situation) when so identical sectional area, because section factor more can improve more greatly the rigidity for fluid pressure, and then, when inner circumferential circle 14 is identical with the sectional area of inner circumferential circle 23, the rigidity of cross section hexagonal portion 3 can be improved higher than cylindrical part 21.
Therefore, when for the cross section hexagonal portion 3 of section factor identical for the cylindrical part 21 with above-mentioned is arranged on central part, can the sectional area of cross section hexagonal portion 3 be arranged less, accordingly, when the shape by cross section hexagonal portion 3 forms the central part 3b of spool 1, compared with forming the situation of central part with the shape by cylindrical part 21, the rigidity of equal extent can be obtained, and can weight reduction compared with the situation of this cylindrical part 21.
Such as, make the opposite side size A of the cross section hexagonal portion 3 in Fig. 4 (a) be 74mm, making the diameter phi d of inner circumferential circle 14
1for φ 56mm, the outside dimension B of the cylindrical part 21 in Fig. 4 (b) is made to be φ 74mm, the diameter phi d of inner circumferential circle 23
2when 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 section factor more in this case, then cross section hexagonal portion 3 be about 29137mm relative to the smallest cross-sectional coefficient of not shown X-axis (transverse axis)
3, what make cylindrical part 21 is about 26735mm relative to the smallest cross-sectional coefficient of X-axis
3even if, when sectional area is little, the section factor of cross section hexagonal portion 3 also than the section factor of cylindrical part 21 larger about about 10%.
And, the structure that cross section hexagonal portion 3 has made two facial 3a of hexagon and line direction and valve wing external diameter direction arrange abreast, so, can by fluid resistance suppression during valve opening in inferior limit, the butterfly valve of Flow characteristics excellence when can be arranged on valve opening.
Then, the camber line portion 24 that continues of the spool 20 of the comparison product shown in the connection R portion 7 of spool 1, gradual change R6, Fig. 5 (b) is compared.
In Fig. 5, represent the major component explanatory drawing of spool, Fig. 5 (a) represents the shape near the cross section hexagonal portion 3 in the spool 1 of butterfly valve of the present invention, and Fig. 5 (b) represents the sectional shape near the cylindrical part 21 in the spool 20 compared in product.
As shown in Fig. 5 (a), the curved surface of the secant-shaped elongated surfaces of the hexagon of cross section hexagonal portion 3 continued with the conical surface position of valve alar part 5 is connected R portion 7, forms gradual change R6 in this connection R portion 7.On the other hand, as shown in Fig. 5 (b), form the camber line portion 24 that continues of secant-shaped in the part continued at the conical surface position of cylindrical part 21 and valve alar part 26.
Now, if make the height C of valve alar part 5 and the height C ' of valve alar part 26 be identical size, then the thickening amount of the thickening part α arranged by gradual change R6 (sectional area of the dashed area shown in Fig. 5 (a)) can be made larger than the thickening amount (sectional area of the hachure part shown in Fig. 5 (b)) of the thickening part β arranged by the camber line portion 24 that continues.This is because when defining gradual change R6 with identical camber line size in central cross section portion, continuing camber line portion 24, due to the difference of the shape of cross section hexagonal portion 3 and cylindrical part 21, the overhang W produced by gradual change R6 can be made
1than the overhang W produced by the camber line portion 24 that continues
2greatly.Its result is, can be formed as the connection R portion 7 making the thickening amount of the gradual change R6 near the central part in spool 1 larger than surrounding, accordingly, on the basis strengthening spool 1, can make favourable shape.
Such as, if the height C of the valve alar part 5 when making the caliber size in Fig. 5 (a) be 400A is 17.5mm, the camber line footpath near the central part of gradual change R6 is made to be R90mm, make the opposite side size A of cross section hexagonal portion 3 be 74mm, then can by the overhang W in the external diameter direction to valve alar part 5 in the peak portion 11 of the gradual change R6 near cross section hexagonal portion 3
1be set in about 81.8mm.Equally, if the height C ' making the valve alar part 26 in Fig. 5 (b) is 17.5mm, make gradual change continue camber line portion 24 time central part near camber line footpath be R90mm, make the diameter phi d of cross section cylindrical part 21
2for 74mm, then the camber line portion 24 that continues near cross section cylindrical part 21 is to the overhang W in the external diameter direction of valve alar part 26
2for about 68.7mm.Accordingly, the thickening amount of the thickening part α of Fig. 5 (a) is larger than the thickening amount of the thickening part β of Fig. 5 (b), and the stiffening effect near central part improves, and spool intensity improves.
And, overhang W when gradual change R6
1in the external diameter direction of the valve alar part 5 of Fig. 5 (a) and the table of spool 1, these both sides of direction are all large, and the intensity of spool 1 entirety also improves.If when forming gradual change R6, the width dimensions of slight enlargement hexagon part, then can be formed larger by the camber line size of gradual change R6, more makes above-mentioned extension stretch out to the external diameter direction of valve alar part 5, more improve intensity.
The overall dimensions of gradual change R6 due to the size of cross section hexagonal portion 3 and valve alar part 5 relation and there is boundary, but, as the overhang W in the peak portion 11 of this gradual change R6, as mentioned above, about 40 ~ 45% of the radius of spool 1 can be set in.When setting the size of gradual change R6, if the size in peak portion 11 is set greatly, then can reduce the cone height of valve alar part 5, but the forming section due to gradual change R6 becomes large, makes weight increase, on the other hand, if the size in peak portion 11 is set little, then can reduce the forming section of gradual change R6, but generation makes necessity that the cone height of valve alar part 5 is large, and weight is increased.When setting peak portion 11, gradual change R6, on the basis considering these situations, can be set to from little connection R gradually to the appropriate shape of large R.
On the other hand, the stress generation near cross section rounded portions 4 and due to static load near the periphery of valve alar part 5 is slight, so, compared with near central part 3b, do not need intensity, now, the internal diameter of the valve rod embedding part 8 of cross section rounded portions 4 is determined by the valve rod footpath of upper lower valve rod 12,13.Therefore, by this part not needing intensity compared with central part 3b is arranged on the cross section rounded portions 4 with cross section hexagonal portion 3 same size degree, simultaneously can maintain intensity, one side reduces wall thickness, seeks weight reduction.Further, with regard to gradual change R6, be also same, because the generation stress in the connection R portion 7 near cross section rounded portions 4 tails off, so, consider durability, sealing by one side, gradual change R6 near cross section rounded portions 4 is arranged to little connection R by one side, can weight reduction.Its result is, by being formed greatly by the gradual change R6 near central part 3b large for stress, makes shape favourable in stress, by by from the little gradually connection R of central part 3b, this gradual change R6 is set, the overall lightweight of spool 1 can be made, and stress dispersion when making valve closing, improve intensity.
Paying attention in spool lightweight and the anterethic situation of stress, can by spool 1 in the position that top and bottom direction two is split to be the size that maximum sized mode sets connection R portion 7.This spool 1 is being arranged above-mentioned peak portion 11 in the position that top and bottom direction two is split, this peak portion 11 is overall dimensions owing to connecting R portion 7, so, become the shape of stretching out to most outside diameter, by the shape in this peak portion 11, strengthen valve alar part 5 most effectively, the stress produced at this valve alar part 5 is significantly disperseed to entirety.
Here, using the spool of the butterfly valve in the present invention as sample, the size Expressing of tip side when being such as caliber size 400A by this sample and the gradual change R of center side is at table 1.In order to compare with spool of the present invention, the camber line size in the camber line portion that necessarily continues comparing the spool of product is also illustrated in 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 such as wishes to be about 42% relative to the ratio of the radius of this spool.
Then, the spool recorded by the above-mentioned table 1 of simulation subtend applies fluid pressure, and stress distribution when producing stress is analyzed.In this case, make the load (being pressed the load applied by fluid) applied for spool be 1.6MPa, 1.8MPa, 2.0MPa, analyze meter Sai Si 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 in the present invention is due to cross section hexagonal portion 3, stress distribution near the central part 3b that section factor is high is few, connect the global shape in R portion 7 owing to defining, stress from central part 3b to peripheral part near be applied to overall such result.Due to this situation, the stress produced because of fluid pressure is concentrated and is difficult to produce on spool 1, can prevent from the mode plastic deformation of warpage, can guaranteeing the sealing produced by spool 1 because of fluid pressure near cross section hexagonal portion 3.Further, due near cross section rounded portions 4, and the peripheral end that seals of the seat ring close contact of not shown butterfly valve near, be substantially not applied to stress and the load produced, so sealing is kept effectively.
On the other hand, when being applied with fluid pressure to the spool (comparing product) of the boss part with the drum be connected with the end, top, due to the cylindrical part 21 that the shape near the central part that fluid pressure is concentrated is cross section cylindrical shape, so this neighbouring section factor is not enough, and owing to substituting 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, so especially near this central part, stress is easily concentrated.And, owing to being the mounting construction that spool is supported by upper lower valve rod, so the first side that the fluid pressure of spool applies is pushed by stem side, and is supported, and on the other hand, second side does not become the state supported by valve rod.Therefore, the flexure near central part is larger, owing to concentrating to the stress near this central part, easily centered by the face of first side, produces warpage, plastic deformation.Accordingly, such as, when this spool being used for the valve of bore of about the 350 ~ 600A comprising caliber size 400A, because its compression area increases, being difficult to guarantee spool intensity, being more difficult to maintain sealing.
Illustrate embodiments of the present invention above, but the present invention is not limited to the record of above-mentioned mode of execution, in the scope of spirit not departing from the invention that claims of the present invention are recorded, can various change be carried out.Accordingly, the arc shape of gradual change R in the outside dimension of the shape of cross section hexagonal portion, outside dimension, cross section rounded portions, length, connection R portion, the sectional shape, wall thickness etc. of valve alar part appropriate specification can be arranged to, desired spool can be correspondingly provided with the caliber size of butterfly valve, purposes etc.
Symbol description
1: spool; 2: boss part; 3: cross section hexagonal portion; 3a: two faces; 3b: central part; 4: cross section rounded portions; 5: valve alar part; 5a: surface portion; 6: gradual change R; 7: connect R portion; 8: valve rod embedding part; 11: peak portion; 12: upper valve rod; 13: lower valve rod; T: middle section; L: spool radius; W: overhang.
Claims (4)
1. the spool of a butterfly valve, at the spool being longitudinally provided with the butterfly valve of the boss part at the bottom of the top of discoideus spool continuously, it is characterized in that, the cross section hexagonal portion of barrel shape is formed at the middle section of above-mentioned boss part, the cross section rounded portions of barrel shape is formed near valve rod embedding part at the bottom of top beyond this cross section hexagonal portion, and above-mentioned boss part is continued with being connected R portion with the valve alar part of above-mentioned spool, this connection R portion is by being configured to continue to the gradual change R of large R gradually from little connection R respectively from the central part of twocouese above-mentioned cross section hexagonal portion at the bottom of the top of above-mentioned cross section rounded portions, and at the central part of above-mentioned spool, by the overlap in above-mentioned connection R portion, form peak portion, the overhang that above-mentioned peak portion stretches out to valve wing external diameter direction is set in 40 ~ 45% of spool radius.
2. the spool of butterfly valve as claimed in claim 1, is characterized in that, by the two sides of the hexagon of above-mentioned cross section hexagonal portion and line direction is arranged to parallel with valve wing external diameter direction.
3. the spool of butterfly valve as claimed in claim 1 or 2, is characterized in that, above-mentioned valve alar part is made cone shape, spool face is tilted to both sides from center spool, by the stress dispersion applied to spool.
4. the spool of butterfly valve as claimed in claim 1, it is characterized in that, the valve rod embedding part at the bottom of the top of above-mentioned boss part has been fitted together to lower valve rod respectively.
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 CN102374298A (en) | 2012-03-14 |
| CN102374298B true CN102374298B (en) | 2015-07-22 |
Family
ID=45793339
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) |
Families Citing this family (3)
| 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 |
| CN102829198B (en) * | 2012-09-04 | 2014-04-23 | 西安交通大学 | Imitated shell type butterfly plate for butterfly valve |
| CN106574726B (en) * | 2014-02-21 | 2020-07-10 | Bs&B 创新有限公司 | Rotatable pressure relief valve assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61193274U (en) * | 1985-05-24 | 1986-12-01 | ||
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5690526B2 (en) | 2015-03-25 |
| CN102374298A (en) | 2012-03-14 |
| JP2012047205A (en) | 2012-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4933082B2 (en) | Butterfly valve | |
| CN102374298B (en) | Valve core of butterfly valve | |
| JP6639876B2 (en) | Flow control valve | |
| KR101726007B1 (en) | Diaphragm valve | |
| EP3392534B1 (en) | Electronic expansion valve and spool thereof | |
| US9506576B2 (en) | Check valve apparatuses and methods | |
| CN201836403U (en) | Elastic position-restricted eccentric shaft butterfly valve | |
| JP2015528550A (en) | Valve body with upper flow diverter | |
| JP4762222B2 (en) | Diaphragm valve | |
| CN1542314A (en) | Adjusting valve | |
| KR101476518B1 (en) | Valve element of butterfly valve | |
| US9709175B2 (en) | Valve having reduced operating force and enhanced throttling capability | |
| JP3676785B2 (en) | Butterfly valve disc | |
| CN116928380B (en) | Closed ultra-low temperature ball valve of helping hand of balanced atress | |
| US7357372B2 (en) | Seat ring for butterfly valve | |
| US8540210B2 (en) | Low friction and gradually opening butterfly valve vane | |
| US20230304584A1 (en) | Butterfly valve | |
| CN105042092A (en) | Supercritical high-pressure double-flap pressure relief sewage discharge type pneumatic flow regulating valve | |
| CN204437336U (en) | V-type revolves a modulating valve | |
| JP5010644B2 (en) | Butterfly valve | |
| CN206513847U (en) | A kind of Novel throttling valve | |
| CN213206601U (en) | Butterfly plate with imitated wing section | |
| KR101271386B1 (en) | Sheet unification butterfly valves | |
| JP7361719B2 (en) | gate valve | |
| CN215371060U (en) | Metal valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Tokyo Patentee after: KITZ Corp. Address before: Chiba County, Japan Patentee before: KITZ Corp. |
|
| CP03 | Change of name, title or address |