GB2247301A - Throttle valve for regulation-intercepting fluids. - Google Patents
Throttle valve for regulation-intercepting fluids. Download PDFInfo
- Publication number
- GB2247301A GB2247301A GB9113988A GB9113988A GB2247301A GB 2247301 A GB2247301 A GB 2247301A GB 9113988 A GB9113988 A GB 9113988A GB 9113988 A GB9113988 A GB 9113988A GB 2247301 A GB2247301 A GB 2247301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shutter
- throttle valve
- valve according
- drive shaft
- seat
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- F16K1/22—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 crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
- F16K1/2268—Sealing means for the axis of rotation
-
- 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
- F16K1/22—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 crossing the valve member, e.g. butterfly valves
-
- 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
- F16K1/22—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 crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- 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
- F16K27/0218—Butterfly valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Multiple-Way Valves (AREA)
Description
"THROTTLE VALVE FOR REûULATION-INT=ACEPTING FLUIDS
The present invention reLates to a throttle valve for regulation-intercepting fluids.
The throttle valves presentLy known in the art essentially comprise a body housing a shutting seat of angular shape, lying on a plane perpendicular to the axis of the flowing direction of the fluid through the body, and a shutter having its master cross-section of circular shape, rotatable relatively to a diametrical axis perpendicular to the axis of flowing direction of the fluid contained in the plane on which the shutting seat is.
In such valves, due to their inherent nature, the hydraulic tightness of the seal between the shutter and the shutting seat takes place at the narrow surface area on which the contact takes place between the shutter and the shutting seat.
Therefore, a perfect tightness is only achieved if two conditions substantially occur, i.e.: if to the contact surface a high enough pressure is applied, such as to compensate for the small value of said surface area, and if the narrow tolerance of copLanarity of the shutter in its closed position, relatively to the plane on which the shutting seat lies, is complied with.
The missed compliance with even just one of said conditions, may cause valves to be obtained, which show a propensity to faultiness.
In the traditional throttle valves known from the prior art, a good quality standard can be hence reached only with a careful, and therefore burdensome, making of the whole constituted by the shutter and the shutting seat, as welL as of the occlusion/deocclusion stroke end shoulders.
In fact, it should be stated that the proper tolerance of coplanarity between the shutter and the seat is also due to the special care in positioning the stroke end shoulders usually provided on the valve body and on the actuation handle. However, inasmuch as both the body and the handle are obtained by casting and in the large series, they cannot be obtained in a ready-to-beassembled state, but must undergo further finishing processing operations, with obvious increases in costs.
The purpose of the present invention is of providing a valve which is capable oi obviating the above drawbacks, ;.e., which is able to secure a reliable tightness of the seal between the shutter and the shutting seat, without that between said elements tendentially high pressures have to be established, and that particuLarly narrow coplanarity tolerances have to be resorted to, with the processing steps and the structure being consequently simper.
Such purposes are achieved by a throttle valve according to the preambLe of claim 1, in which the shutting seat is formed by a groove having a circleportion-shaped section, and the shutter has its side surface also with a circle-portion-shaped contour, with said circle portions substantially having the same radius.
In such a way, the surface area on which the contact between the seat and the shutter takes place, is tendentially large relatively to the rated diameter of the valve; such a large value of said contact surface area can hence easily compensate for errors of mutual positioning of the shutter and the shutting seat, without the valve showing any anomalies affecting its intercepting performance.
The present invention is illustrated for merely exemplifying, non-limitative-purposes, in the Figures of the accompanying drawing tables, wherein:
Figure 1 shows a sectional view of the valve in its closed position;
Figure 2 shows a section-plane view of the shutter;
Figure 3 shows a sectional view along the line III Iii of Figure 2, of the shutter alone.
Referring to the above said Figures, the throttle valve 1 for intercepting fluids, according to the present invention, comprises a body 2 which houses a shutting seat 3, a shutter 4, and a shutter drive shaft 5.
The body 2, which is preferably obtained by pressing, forging, die-casting, and so forth, is provided with two end portions provided with means which enable said body to be constrained to the pipes to which the valve has to be applied.
In the herein exemplified case, such means comprise two threaded flanges 6 integral with the remainder portion of the body 2. The shutting seat 3 is an annular groove, whose cross-section has the shape of a circle portion, i.e., is shaped according to a diametrical sphere portion.
The shutting seat 3 can be easily obtained, with very good precision, by simply turning the body 2.
The radius of the annular groove and of the circleportion-shaped portion are substantially equal to the radius of the shutter 4.
The shutting seat 3 is interrupted at two diametrically opposite points by the presence of a blind cylindrical seat 7 and a through-passing cylindrical seat 8, both engaged by the shutter drive shaft 5. The shutter drive shaft 5 has an axis 9 which is perpendicular to the axis 10 which defines the direction of fluid flowing through the body of the same valve; therefore, the plane on which the shutting seat lies is also perpendicular to the axis of fluid flowing direction.
The shutter 4 has its master cross-section of circular shape and, when it is in its closed position, it
Lies on the same plane of the shutting seat 3, engaging it, whilst in its open position, it lies on a perpendicular plane.
The side surface 11 of the shutter 4 has a circleportion-contoured shape along its whole peripheral portion, and therefore also at the regions in which said shutter 4 meets the cylindrical seats 7 and 8.
The radius of the circular outline of the side surface 11 is substantially equal to the radius of the shutter, and hence of the section of the shutting seat.
In such a way, the contact between the shutter and the shutting seat takes place along two conjugated surfaces, which secure a high tightness of sealing also with relative pressure of tendentially small values.
Furthermore, inasmuch as they substantially have the same bending and the same radius, they can slide relatively to each other in a very easy way, because the necessary force to move them only depends on the low interference pressure and therefore on the friction existing between them.
The conditions of tightness and friction can be advantageously modified by making the tightness seat or the side surface 11 of the shutter, or both of them, of an elastic and yielding material, which is anyway selected from among those materials which are capable of withstanding the chemical and mechanical aggressiveness of the intercepted fluid.
In the herein exemplified case, the shutter 4 has been so made as to comprise a core 12 coated by a layer of rubbery or elastomeric material 13.
The core 12 is preferably formed by two identical metal plates, due to reasons of cost saving and standardization, which are so centrally deformed as to enable the shutter drive shaft 5, which is keyed to the same shutter by suitable means, to run through.
In the herein exempLified case, such keying means comprise a male square 1; provided on the shutter drive shaft 5, and a female square 15 provided in the core 12.
The shutter drive shaft 5 futhermore comprises a cylindrical end 16, a cylindrical intermediate portion 17, a shoulder 18, and enlarged cylindrical portion 19, and an end portion engaged by the controL means 20 used to actuate the valve.
The cylindrical end 16 is designed to get engaged inside the blind cylindrical seat 7, whilst the intermediate cylindrical portion 1, is designed to get engaged inside the through cylindrical seat 8.
Inasmuch as the contact surfaces along which the contact between the shutter and the shutting seat takes place, extend also along the mouth of the blind cylindrical seat 7 and of the through cylindrical seat , establishing a tight sealing between them and the interior of the valve body, it is not necessary to provide tight sealing gaskets inside said seats 7 and 8, in order to prevent the intercepted fluid to penetrate, with self-expLanatory economical adavantages arising from such a simplification in valve structure. Any lubricants possibly charged to the cylindrical seats 7 and 8 during the step of valve assembly is retained, maintaining the couplings efficient over time, and therefore preserving the low initial value of resistance to the occlusion/deocclusion operations.
As regards the through mouth 8, besides the coupling functionality being preserved, the use of packing gaskets is avoided, with the overall structure being furthermore simplified.
The shoulder 18 is an element to stop the shaft 5 inside the interior of the through cylindrical seat 8 provided in the body 2 to the valve.
On the shoulder 18, a nut 22 acts through a selflubricating gasket 24, preferably made of Teflon.
Such a gasket 24 may also act as an emergency gasket, should the tightness of sealing between the shutter and the shutting seat at the through cylindrical seat 8 fail, due to any reasons.
In the herein exemplified case, the end 20
is engaged by hand-operated drive means, which anyway could be replaced by other means, of different nature. In fact, for such a purpose, the valve can be easily modified, above alL due to the fact that, as already said above, the shutter 4 and the relevant seat 3 generate the tight sealing of fluid also as regards the shutter drive shaft 5, the relevant seats 7 and 8 for said shaft, and as regards any possible passages which said shutter drive shaft 5 may create towards the external environment.
In fact, differently from the throttle valves known from the prior art, in its region beyond the dashed line 23, the valve according to the instant invention can be modified by applying any servo mecnanisms, without having to face any tightness problems at the point at which the shutter drive shaft 5 exits the valve body 2.
Furthermore, the positioning of the shutter drive shaft inside the interior of the shutter makes it possible the disturbancy to the flow of fluid along the shutter 4 to be kept at a minimum, with said shutter 4, for that purpose, being additionally suitably shaped at its enlarged portion provided to allow the shutter drive shaft 5 to pass through it.
The shutter drive shaft 5 is slid into the shutter 4 and is slightly forced inside it, so as to enable the male square 14 to get stably engaged with the female square 15.
The bolt 22 stably fastens the drive shaft 5.
Claims (9)
1. Throttle valve (1) for intercepting and regulating the flow of fluids, essentially comprising a body (2) housing an annular shutting seat (3) lying on a plane perpendicular to the axis of the direction of flow of the fluid (10) through the body (2), and a shutter having its master cross-section of circular shape, rotatable relatively to a diametrical axis t9) perpendicular to the axis of direction of flow of the fluid, contained on the same plane on which the shutting seat (3) Lies, characterized in that the shutting seat (3) is formed by a groove having a section of circleportion-shape, i.e. shaped according to a diametrical sphere portion, and that the shutter (4) has its side surface (11) with an outline also shaped as a circle portion, with said circle portions substantially having the same radius.
2. Throttle valve according to claim 1, characterized in that the radius of the circle portions is substantially equal to the radius oi the master cross-section of the shutter (4).
3. Throttle valve according to claim 1, characterized in that at least the shutting seat (3), or at least the side surface (11) of the shutter are made of elasto-plastic and yielding material, capable of generating the hydraulic tight seal.
Throttle valve according to claim 3, characterized in that the shutter (4) comprises a core (12) coated by a layer of rubbery or elastomeric material (13), so selected as to be capable of performing the double function of securing the seal tightness and protecting the shutter from the chemical aggressiveness of the fluid and/or of the impurities contained in it.
5. Throttle valve according to claim 1, characterized in that the shutter (4) is actuated by means of a through-running shutter drive shaft (5), fastened to it by means of keying means (14, 15), which can be disengaged when said shutter drive shaft (15) is slid off.
6. Throttle valve according to claim 5, characterized in that said keying means comprise a male portion (14) and a female portion (15) respectively associated with the shutter drive shaft (5) and with the shutter (4).
7. Throttle valve according to claim 4, characterized in that the core (12) of the shutter t4) is preferably formed by two identical half-cores, coupled with each other.
8. Throttle valve according to claim 5, characterized in that the shutter drive shaft CS) is fastened to the valve body (2) by means of a nut (22) acting on a shoulder (18), with a self-lubricating washer, possibly acting as a safety gasket, being interposed.
9. Throttle valve, substantially as hereinabove disclosed and illustrated, and for the specified purposes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2146390U IT220044Z2 (en) | 1990-07-09 | 1990-07-09 | BUTTERFLY VALVE FOR THE CONTROL OF FLUID REGULATION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9113988D0 GB9113988D0 (en) | 1991-08-14 |
| GB2247301A true GB2247301A (en) | 1992-02-26 |
Family
ID=11182181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9113988A Withdrawn GB2247301A (en) | 1990-07-09 | 1991-06-28 | Throttle valve for regulation-intercepting fluids. |
Country Status (7)
| Country | Link |
|---|---|
| DE (1) | DE9108326U1 (en) |
| DK (1) | DK130691A (en) |
| ES (1) | ES1018264Y (en) |
| FR (1) | FR2664351B3 (en) |
| GB (1) | GB2247301A (en) |
| GR (1) | GR910200174U (en) |
| IT (1) | IT220044Z2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005040653A1 (en) * | 2003-10-22 | 2005-05-06 | Siemens Aktiengesellschaft | Throttle valve support |
| IT201800006040A1 (en) * | 2018-06-05 | 2019-12-05 | Valve device for the transfer of powdered products |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2692622B1 (en) * | 1992-06-17 | 1994-09-16 | Solex | Rotary throttle member for internal combustion engine power supply installation and throttle body including application. |
| DE202008005992U1 (en) * | 2008-04-30 | 2008-08-14 | Friedrich Boysen Gmbh & Co. Kg | flap valve |
| DE102013018349A1 (en) | 2013-10-31 | 2015-04-30 | Festo Ag & Co. Kg | throttle valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3666233A (en) * | 1970-05-06 | 1972-05-30 | Domer Scaramucci | Butterfly valve assembly having split body |
| GB1297623A (en) * | 1968-12-04 | 1972-11-29 |
-
1990
- 1990-07-09 IT IT2146390U patent/IT220044Z2/en active IP Right Grant
-
1991
- 1991-06-28 GB GB9113988A patent/GB2247301A/en not_active Withdrawn
- 1991-07-03 GR GR91200174U patent/GR910200174U/en unknown
- 1991-07-04 DK DK130691A patent/DK130691A/en not_active Application Discontinuation
- 1991-07-05 DE DE9108326U patent/DE9108326U1/en not_active Expired - Lifetime
- 1991-07-08 FR FR9108525A patent/FR2664351B3/en not_active Expired - Lifetime
- 1991-07-08 ES ES9102150U patent/ES1018264Y/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1297623A (en) * | 1968-12-04 | 1972-11-29 | ||
| US3666233A (en) * | 1970-05-06 | 1972-05-30 | Domer Scaramucci | Butterfly valve assembly having split body |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005040653A1 (en) * | 2003-10-22 | 2005-05-06 | Siemens Aktiengesellschaft | Throttle valve support |
| IT201800006040A1 (en) * | 2018-06-05 | 2019-12-05 | Valve device for the transfer of powdered products |
Also Published As
| Publication number | Publication date |
|---|---|
| IT9021463V0 (en) | 1990-07-09 |
| GB9113988D0 (en) | 1991-08-14 |
| IT220044Z2 (en) | 1993-06-09 |
| GR910200174U (en) | 1992-08-26 |
| DK130691D0 (en) | 1991-07-04 |
| ES1018264U (en) | 1992-01-16 |
| DE9108326U1 (en) | 1991-09-19 |
| FR2664351A3 (en) | 1992-01-10 |
| DK130691A (en) | 1992-01-10 |
| IT9021463U1 (en) | 1992-01-09 |
| ES1018264Y (en) | 1992-08-01 |
| FR2664351B3 (en) | 1992-06-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |