CN103671954B - The anti-cavitation structure of eccentric rotary regulating valve - Google Patents
The anti-cavitation structure of eccentric rotary regulating valve Download PDFInfo
- Publication number
- CN103671954B CN103671954B CN201210316998.7A CN201210316998A CN103671954B CN 103671954 B CN103671954 B CN 103671954B CN 201210316998 A CN201210316998 A CN 201210316998A CN 103671954 B CN103671954 B CN 103671954B
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- CN
- China
- Prior art keywords
- valve
- eccentric rotary
- valve seat
- rotary regulating
- valve body
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
- F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
Abstract
The invention discloses a kind of anti-cavitation structure of eccentric rotary regulating valve, comprise valve body, spool, the valve seat relative with described spool, valve pocket is provided with in described valve body, described spool is positioned at valve pocket inside, the left side of described valve body is provided with import, the right side of described valve body is provided with outlet, described valve seat is fixed on described inlet, one piece of orifice plate is fixed in the outlet port of described valve body, described orifice plate is provided with a throttle orifice and a mounting hole, described mounting hole is built with a balance valve core, relatively with described balance valve core be provided with one and balance valve seat, described balance valve seat is fixed on orifice plate.The anti-cavitation structure of this eccentric rotary regulating valve effectively reduces the infringement of cavitation erosion to eccentric rotary regulating valve, and protection valve and pipeline, not by cavitation erosion, extend the working life of valve.
Description
Technical field
The present invention relates to a kind of industrial stokehold valve, particularly relate to a kind of anti-cavitation structure of eccentric rotary regulating valve.
Background technique
Eccentric rotary regulating valve has another name called caimflex valve, spool is cam eccentric structure, the prooving of valve seat can be reduced, increase sealability, spool rear portion is provided with a flap place, is conducive to fluid stable flowing, has excellent stability, be widely used in automatic adjustment in the industrial processes such as chemical industry, oil, light textile, metallurgy and power station and telecontrol, with pneumatic (electronic) regulator, reduction valve, valuator and other instrument with the use of.Eccentric rotary regulating valve valve body stream is simple, and resistance is little, compared with the single, double seat valve of same bore, has larger negotiability, but weight only have its about 1/3.Eccentric rotary regulating valve adopts rotary motion, improves packing box seal, has larger ouput force simultaneously, so the leakage of valve is less, rigidity is comparatively large, can reliably work under rated differential head, is suitable for rub resistance resistance to erosion etc. and contains solid material and viscosity medium.Eccentric rotating valve core, valve rod only rotate, so institute's frictional force of bearing is very little during its switch turns, when spool and valve seat contact closedown, the soft arm of spool produces small elastic deformation and elastic tension power under actuator's thrust, spool is made to coordinate close and firm more with the contact of valve base chamber, therefore, camflex valve leakage rate is very little, stream is simple, the little ratio of flow resistance is large with other flow capacity of control valves of bore, and the thrust simultaneously needed for throttle down is little compared with same bore ball valve, butterfly valve.
In the working environment residing for eccentric rotary regulating valve, situation larger with downstream pressure difference before more easily running into valve.As shown in Figure 1, when upstream pressure P1 is very high, and when downstream pressure P2 is very low, liquid medium is in spool 3 place's throttling, and flow velocity sharply increases, and static energy is sharply converted into kinetic energy, and now pressure sharply declines; After medium flows through outlet 12, flow velocity declines and pressure recover, when pressure recover is to when being greater than the saturation vapor pressure of liquid, the steam of original cavitation reverts to liquid condition again, the steam bubble of this cavitation generation breaks and can discharge that huge energy can cause valve noise, vibrations and trim damage, produce cavitation phenomenon, sizable harm is caused to valve, has a strong impact on the working life of valve.
Summary of the invention
The shortcoming of prior art in view of the above; the object of the present invention is to provide a kind of anti-cavitation structure of eccentric rotary regulating valve; this structure can effectively solve because larger pressure difference between before valve and after valve causes the problem cavitating and damage to valve; greatly reduce the infringement of cavitation erosion to eccentric rotary regulating valve; protection valve and pipeline, not by cavitation erosion, extend the working life of valve.
For achieving the above object and other relevant objects, the invention provides a kind of anti-cavitation structure of eccentric rotary regulating valve, comprise valve body, spool, the valve seat relative with described spool, valve pocket is provided with in described valve body, described spool is positioned at valve pocket inside, the left side of described valve body is provided with import, the right side of described valve body is provided with outlet, described valve seat is fixed on described inlet, it is characterized in that, one piece of orifice plate is fixed in the outlet port of described valve body, described orifice plate is provided with a throttle orifice and a mounting hole, described mounting hole is built with a balance valve core, relatively with described balance valve core be provided with one and balance valve seat, described balance valve seat is fixed on orifice plate.
Preferably, described balance valve core comprise a columniform horizontal part, with vertical portion connected vertically, horizontal part right part, a columniform through hole is provided with in the middle part of described balance valve seat, described balance valve seat inside is provided with 4 fan shaped boreholes, described fan shaped borehole is with described through hole for axle center is uniform, and described horizontal position is in described through hole.
Further, described horizontal part is set with spring, described spring left part is fixed on described horizontal part by nut, and described spring right part abuts against on described balance valve seat left side.
Preferably, described valve body is connected by screw-thread fit with orifice plate.
Further, described spool is crank cam structure.
The anti-cavitation structure of this eccentric rotary regulating valve installs one piece of orifice plate additional at valve outlet place; a buffer strip is formed in valve pocket between valve import and outlet; the infringement of cavitating and eccentric rotary regulating valve being caused is effectively reduced by the method for progressively step-down; thus serve protection valve, extend the effect in valve working life.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of existing eccentric rotary regulating valve valve body.
Fig. 2 is shown as the schematic diagram of the anti-cavitation structure of eccentric rotary regulating valve of the present invention.
Fig. 3 is shown as the zoomed-in view of the I place balance valve seat of Fig. 2.
Fig. 4 is shown as in Fig. 3 the A direction view balancing valve seat 6.
Number in the figure explanation
1 valve body
11 imports
12 outlets
13 valve pockets
2 valve seats
3 spools
4 orifice plates
5 balance valve cores
51 horizontal parts
52 vertical portions
6 balance valve seats
61 through holes
62 fan shaped boreholes
7 springs
8 throttle orifices
9 self-clinching nuts
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present invention and effect easily.
Refer to Fig. 1 to Fig. 4.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Fig. 2 is the anti-cavitation structure of a kind of eccentric rotary regulating valve of the present invention, the anti-cavitation structure of described eccentric rotary regulating valve comprises valve body 1 as shown in Figure 2, spool 3, the valve seat 2 relative with described spool 3, valve pocket 13 is provided with in described valve body 1, it is inner that described spool 3 is positioned at valve pocket 13, the left side of described valve body 1 is provided with import 11, the right side of described valve body 2 is provided with outlet 12, described valve seat 2 is fixed on described import 11 place, described valve seat 2 is fixed on described valve body 1 by self-clinching nut 9, one piece of orifice plate 4 is fixed at outlet 12 place of described valve body 1, described orifice plate 4 is provided with a throttle orifice 8 and a mounting hole, described mounting hole is built with a balance valve core 5, relatively with described balance valve core 5 be provided with one and balance valve seat 6, described balance valve seat 6 is fixed on orifice plate 4.
Described balance valve core 5 comprises a columniform horizontal part 51, vertical portion 52 connected vertically with horizontal part right part, a columniform through hole 61 is provided with in the middle part of described balance valve seat 6, described balance valve seat 6 inside is provided with 4 fan shaped boreholes 62, described fan shaped borehole 62 is that axle center is uniform with described through hole 61, described horizontal part 51 is positioned at described through hole 61, through hole 61 has the leading role to balance valve core 5, spring 7 is set with outside described horizontal part 51, described spring 7 left part is fixed on described horizontal part 51 by nut, described spring 7 right part abuts against on described balance valve seat 6 left side, described valve body 1 is connected by screw-thread fit with orifice plate 4, described spool 3 is crank cam structure.
During concrete enforcement, get a sheet metal, the outlet 12 of sheet metal external diameter and eccentric rotary regulating valve is suitable, external threading on described sheet metal periphery post, to get on the bus the internal thread matched with sheet metal outside thread in the inner circle of eccentric rotary regulating valve outlet 12 simultaneously.According to the result of flow rate calculation, bore a sizeable throttle orifice 8 on a metal plate, so that the circulation of medium.Overlap at horizontal part 51 after the horizontal part 51 of balance valve core 5 is penetrated from the through hole 61 balanced in the middle part of valve seat 6 and load spring 7, with nut, spring 7 left part is fixed on the horizontal part 51 of balance valve core 5, spring 7 right part is made to abut against on balance valve seat 6 left side, and the vertical portion 52 of balance valve core 5 leans against on balance valve seat 6 right side, and now equilibrium valve is closed.So far, orifice plate 4 is ready.Subsequently orifice plate 4 is assemblied in outlet 12 place of valve, both are closely connected by screw thread, just complete the assembling of the anti-cavitation structure of eccentric rotary regulating valve.
After one piece of orifice plate 4 is installed in the outlet 12 at eccentric rotary regulating valve additional, as shown in Figure 2, in the valve pocket 13 of valve body 1, define a buffer space, namely between upstream pressure P1 and downstream pressure P2, define a buffer space.When liquid medium flow valve, liquid medium is after spool 3 place's throttling, due to the stop of orifice plate 4, a new pressure P 3 is formed in the valve pocket at spool 3 rear portion, the size of pressure P 3 is between P1 and P2, when medium is by throttle orifice 8 just step-down formation downstream pressure P2, as can be seen here, the transitional pressure P3 formed between P1 and P2 plays the effect of transition buffer between P1 and P2, upstream pressure P1 is first progressively reduced to P3, progressively P2 is reduced to again by P3, the energy produced when valve internal pressure being changed and transforms between the various state of medium reduces greatly, thus the infringement of cavitating and valve being caused is reduced by progressively step-down.If upstream pressure P1 constantly increases, pressure P 3 also constantly increases, now, balance valve core 5 will be pushed open by medium, (now spring-compressed) is departed from from balance valve seat 6, medium flows out together with throttle orifice 8 from the fan shaped borehole 62 by balance valve seat 6, keeps the relative equilibrium of valve body 1 inside and outside differential pressure, plays balanced action.If now upstream pressure P1 reduces, cause pressure P 3 to reduce, on balance valve core 5, the spring 7 of suit drives balance valve core 5 to reset, and still makes valve external and internal pressure be in relative balance state, thus reduce the damage that valve is caused of cavitating further, extend the working life of eccentric rotary regulating valve.The trims such as valve body of the present invention, spool, valve seat, self-clinching nut all adopt standard eccentric rotary regulating valve part, improve the part generalization degree between series product.
The anti-cavitation structure of the eccentric rotary regulating valve that the present invention relates to efficiently solves eccentric rotary regulating valve in prior art and suffers cavitation erosion to damage serious problem; an orifice plate 4 is added a cover at outlet 12 place of eccentric rotary regulating valve valve body 1; make upstream pressure P1 through transitional pressure P3 progressively step-down change downstream pressure P2 into; reduce between the change of valve internal pressure and the various state of medium and mutually transform the huge energy produced; substantially reduce the harm of cavitation erosion to valve; protect valve; extend the working life of valve, tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (4)
1. the anti-cavitation structure of an eccentric rotary regulating valve, comprise valve body (1), spool (3), the valve seat (2) relative with described spool (3), valve pocket (13) is provided with in described valve body (1), it is inner that described spool (3) is positioned at valve pocket (13), the left side of described valve body (1) is provided with import (11), the right side of described valve body (1) is provided with outlet (12), described valve seat (2) is fixed on described import (11) place, it is characterized in that, one piece of orifice plate (4) is fixed at outlet (12) place of described valve body (1), described orifice plate (4) is provided with a throttle orifice (8) and a mounting hole, described mounting hole is built with a balance valve core (5), relatively with described balance valve core (5) be provided with one and balance valve seat (6), described balance valve seat (6) is fixed on orifice plate (4), described balance valve core (5) comprises a columniform horizontal part (51), with vertical portion connected vertically, horizontal part right part (52), described balance valve seat (6) middle part is provided with a columniform through hole (61), described balance valve seat (6) inside is provided with 4 fan shaped boreholes (62), described fan shaped borehole (62) with described through hole (61) for axle center is uniform, described horizontal part (51) is positioned at described through hole (61).
2. the anti-cavitation structure of eccentric rotary regulating valve according to claim 1, it is characterized in that: described horizontal part (51) is set with spring (7), described spring (7) left part is fixed on described horizontal part (51) by nut, and described spring (7) right part abuts against on described balance valve seat (6) left side.
3. the anti-cavitation structure of eccentric rotary regulating valve according to claim 1, is characterized in that: described valve body (1) is connected by screw-thread fit with orifice plate (4).
4. the anti-cavitation structure of eccentric rotary regulating valve according to claim 1, is characterized in that: described spool (3) is crank cam structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210316998.7A CN103671954B (en) | 2012-08-30 | 2012-08-30 | The anti-cavitation structure of eccentric rotary regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210316998.7A CN103671954B (en) | 2012-08-30 | 2012-08-30 | The anti-cavitation structure of eccentric rotary regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103671954A CN103671954A (en) | 2014-03-26 |
| CN103671954B true CN103671954B (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210316998.7A Active CN103671954B (en) | 2012-08-30 | 2012-08-30 | The anti-cavitation structure of eccentric rotary regulating valve |
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| CN (1) | CN103671954B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3201573U (en) | 2015-10-05 | 2015-12-17 | イハラサイエンス株式会社 | valve |
| CN108825797A (en) * | 2018-07-16 | 2018-11-16 | 光大环保技术研究院（南京）有限公司 | A kind of flow control valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196968U (en) * | 1986-06-05 | 1987-12-15 | ||
| JPH10213240A (en) * | 1997-01-30 | 1998-08-11 | Tomoe Gijutsu Kenkyusho:Kk | Dual plate check valve |
| WO2000001970A1 (en) * | 1998-07-06 | 2000-01-13 | Esplin, Tricia | Anti-hammer and noise reducing control valves for dishwasher and washing machine type applications |
| DE19841215A1 (en) * | 1998-09-09 | 2000-04-20 | Vetec Ventiltechnik Gmbh | Rotating cone valve for use in fluid process technology applications has guide vanes minimizing generation of noise arising from turbulent flow |
| CN2436722Y (en) * | 2000-04-16 | 2001-06-27 | 陈洋 | Lash-resistant hydraulic controlling open/close valve |
| CN2632424Y (en) * | 2003-06-20 | 2004-08-11 | 邢同春 | Overpressure and overflow self-control gas valves |
| CN201111577Y (en) * | 2007-10-12 | 2008-09-10 | 浙江盾安华强机械有限公司 | Swing check valve |
-
2012
- 2012-08-30 CN CN201210316998.7A patent/CN103671954B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62196968U (en) * | 1986-06-05 | 1987-12-15 | ||
| JPH10213240A (en) * | 1997-01-30 | 1998-08-11 | Tomoe Gijutsu Kenkyusho:Kk | Dual plate check valve |
| WO2000001970A1 (en) * | 1998-07-06 | 2000-01-13 | Esplin, Tricia | Anti-hammer and noise reducing control valves for dishwasher and washing machine type applications |
| DE19841215A1 (en) * | 1998-09-09 | 2000-04-20 | Vetec Ventiltechnik Gmbh | Rotating cone valve for use in fluid process technology applications has guide vanes minimizing generation of noise arising from turbulent flow |
| CN2436722Y (en) * | 2000-04-16 | 2001-06-27 | 陈洋 | Lash-resistant hydraulic controlling open/close valve |
| CN2632424Y (en) * | 2003-06-20 | 2004-08-11 | 邢同春 | Overpressure and overflow self-control gas valves |
| CN201111577Y (en) * | 2007-10-12 | 2008-09-10 | 浙江盾安华强机械有限公司 | Swing check valve |
Non-Patent Citations (1)
| Title |
|---|
| 一种新型的避免调节阀发生气蚀的方法——孔板节流法;岳邦强;《科技资讯》;20100413(第11期);第107页倒数第6行至倒数第1行，第109页第1行至倒数第1行，图1 * |
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| CN103671954A (en) | 2014-03-26 |
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