WO2014012135A1 - An open bodied pinch valve - Google Patents
An open bodied pinch valve Download PDFInfo
- Publication number
- WO2014012135A1 WO2014012135A1 PCT/AU2013/000784 AU2013000784W WO2014012135A1 WO 2014012135 A1 WO2014012135 A1 WO 2014012135A1 AU 2013000784 W AU2013000784 W AU 2013000784W WO 2014012135 A1 WO2014012135 A1 WO 2014012135A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame
- pinch valve
- pinch
- liner
- flange
- Prior art date
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
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
- F16K7/04—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force
Abstract
An open bodied pinch valve including: a frame; a resilient liner including a bore; a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore; first and second flange supports which support respective first and second regions of the resilient liner; at least one of the flange supports is mounted to the frame and supported on the frame by way of interposed removable spacer members; wherein the removable spacer members are replaceable by a respective spacer member of a different length, to effect adjustment of the distance between the flange supports to accommodate resilient liners of various lengths.
Description
AN OPEN BODIED PINCH VALVE
Technical Field
The present invention relates to valves of the type used in large scale industrial fluid control systems and particularly relates to an open bodied pinch valve.
Background
Pinch valves are used to control the flow of various types of fluids. They typically consist of a body and an elastomeric sleeve. The sleeve includes a bore through which fluid flows. The sleeve can be deformed to reduce the effective cross sectional area of the bore to control the rate of fluid flow, or the bore can be closed completely to shut off flow.
One type of pinch valve is known as an open bodied pinch valve. Such valves include a frame type body with two metal flange supports spaced apart by a pair of crossbars. The flange supports retain the sleeve in the valve and include a series of radially spaced apart holes which receive bolts for mating the sleeve to adjacent pipe work. A pair of upper and lower pinch bars are provided which are driven to move the pinch bars towards or away from one another to pinch the sleeve to control fluid flow.
Typical example uses include controlling flow in minerals processing operations, for example by using the pinch vale to constrict the flow of minerals slurries in a pipeline. Summary
In a first aspect, there is provided an open bodied pinch valve including: a frame; a resilient liner including a bore; a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore; first and second flange supports which support respective first and second regions of the resilient liner; at least one of the flange supports is mounted to the frame and supported on the frame by way of interposed removable spacer members; wherein the removable spacer members are replaceable by a respective spacer member of a different length, to effect adjustment of the distance between the flange supports to accommodate resilient liners of various
lengths.
In certain embodiments, the removable spacer members mount to the frame at a joint which is formed by flanges which engage with recesses to align the spacer members with the frame.
In certain embodiments, the removable spacer members mount to the frame at a joint which includes a rectangular recess to support the spacer member with respect to the frame.
In a second aspect, there is provided a pinch valve system, the system including: a pinch valve according to the first aspect; and a plurality of spacer members of different lengths. In a third aspect, there is provided a method of commissioning a pinch valve, the method including the steps of: providing a pinch valve system according to the second aspect; and selecting spacer members from the available spacer members and fitting these to the pinch valve to provide a desired distance between the frame and the or each flange support members to suit a particular length of resilient liner.
In a fourth aspect, there is provided an open bodied pinch valve including: a frame; a resilient liner including a bore; a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore; and first and second flange supports which support respective first and second regions of the resilient liner; wherein the frame is arranged to retain a portion of each flange support element at a shoulder seat thereon.
In certain embodiments, a removable spacer member is located between the frame and at least one of the flange supports to retain the said portion of each flange support element at a shoulder seat thereon.
In certain embodiments, each flange support includes upper and lower flange support elements and either the frame or the spacer is arranged to retain a portion of the
lower flange support element.
In certain embodiments, the removable spacer members mount to the frame at a joint which is formed by flanges which engage with recesses to align the spacer members with the frame.
In certain embodiments, the removable spacer members mount to the frame at a joint which includes a rectangular recess to support the spacer member with respect to the frame.
In a fifth aspect there is provided a method of replacing the liner of a pinch valve, the method including the steps of: providing a pinch valve according to the fourth aspect; removing at least a portion of each flange support to allow for removal of the liner; installing a replacement liner; and replacing the flange supports so that they are retained on the frame or on a spacer attached to the frame..
In certain embodiments, the method further including the step of securing the replaced flange support elements in place with fasteners. In a sixth aspect, there is provided an open bodied pinch valve including: a frame; a resilient liner including a bore; a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore; first and second flange supports which support respective first and second regions of the resilient liner; and an attachment formation for attaching one of a selection of valve actuators to the valve.
In certain embodiments, the pinch mechanism includes a lower pinch bar and an upper pinch bar, the attachment formation is provided in fixed spaced relation to the lower pinch bar and the actuator is arranged in use to adjust the distance between the upper pinch bar and the attachment formation.
In certain embodiments, the selection of actuators includes a manually operated actuator. In an alternative embodiment, the selection of actuators includes an electrically operated actuator. In a further alternative embodiment, the selection of
actuators includes a hydraulically operated actuator. In a further alternative embodiment, the selection of actuators includes a pneumatically operated actuator.
Brief Description of the Drawings
Notwithstanding any other forms which may fall within the scope of the apparatus as set forth in the Summary, specific embodiments will now be described, by way of example, and with reference to the accompanying drawings in which:
Figure 1 is a perspective view of an embodiment of an open bodied pinch valve;
Figure 2 is a perspective view of the frame for an open bodied pinch valve; Figure 3 is a side view of the frame of Figure 2;
Figure 4 is a perspective view of the frame of Figure 2 fitted with spacers of a different length;
Figure 5 is an exploded detail view of a portion of the frame of Figure 4;
Figure 6 shows a frame for an open bodied pinch valve with a flange support element removed;
Figure 7 is a front view of an open bodied pinch valve with no actuator fitted;
Figure 8 is a side view of the open bodied pinch valve of Figure 7; and
Figures 9 to 12 show various types of actuators that can be used with the pinch valve of Figure 7.
Detailed Description of Embodiments
Referring to Figure 1, an open bodied pinch valve 10 is shown including a frame 12 which is formed from two identical side plates of cross-bar shape 14, 16 which
are fixed at their respective upper edges to either end of a rectangularly-shaped top plate 18. The valve 10 further includes a liner in the form of an elongate tube or pipe 40 which is formed from an elastomeric material and which includes a central bore 41 extending therethrough. The pipe 40 passes through the frame 12 so that it is surrounded on three sides by the side plates 14, 16 and the top plate 18.
A pinch mechanism is provided as part of the valve 10 consisting of a lower pinch bar 52 and an upper pinch bar 54 located on opposite sides of the pipe 40 and which may be moved by an actuator 60 as will be later described to bring the pinch bars 52, 54 to bear against the pipe 40 at about the mid-point of the length of the pipe 40 to deform it so as to adjust the effective cross sectional area of the bore 41 of the pipe 40. Flanges 42 are provided at either end of sleeve, the regions around which each being supported by a flange support which is formed in the shape of a circular ring 20 in two identical halves comprising an upper flange support member in the form of a half-ring 22 and a lower flange support member in the form of a half ring 24. The flange support half rings 22, 24 include a series of holes which correspond with holes provided in the flanges 42 of the sleeve which in use are arranged to receive bolts to fit the ends of the pipe 40 to adjacent pipe work, or to other fluid fittings, such as the outlet of a holding tank, in a conventional fashion.
In further embodiments the flange supports may not be located right at the ends of the sleeve, but can be located in such a way as to provide support in the general end regions of the tube or pipe 40. The frame 12 of the valve 10 is reconfigurable to accommodate sleeves of different lengths, as may be required according to the particular application at hand as will now be described with reference to Figures 2 to 5.
Referring to Figures 2 and 3, the frame 12a for an open bodied pinch valve is shown of a similar type to that of Figure 1, the frame 12a comprising side plates 14a, 16a. The upper and lower flange support members in the form of half-rings 22, 24 are spaced away from the side plates 14a, 16a of the frame 12a by a series of four identical spacers elements in the form of generally rectangular plates 60.
Referring to Figure 4, an arrangement similar to that of Figure 2 is shown, except that the spacer elements in the form of generally rectangular plates 60 have been replaced with spacers 60a which are of a comparatively increased length. As can be seen from the Figures, by the inclusion of spacers of varying lengths between the flange supports and the side plates, the distance between the flange supports may be adjusted. This enables the pinch valve to be reconfigured in the field to accommodate sleeves of varying lengths. Kits of pairs of spacer members of the same or different lengths can be supplied with the pinch valves to allow the user to select different spacer lengths as required - in some cases the pair of spacers fitted at one end of the pinch valve can be of a different length to the pair of spacers that is fitted at the other end. This facilitates support of various lengths of resilient liner, as will be described.
Referring to Figure 5, the spacer 60a is shown in an enlarged detail. The spacer 60a and the region where it is mounted to the side plate 14a are shaped to provide alignment of the spacer 60a with the side plate 14a, to enable spacer 60a to be held in position whilst fixing bolts are fitted, and to provide inherent strength to the joint between spacer 60a and side plate 14a. The flanges 62a, 62b on the spacer 60a are sized suitable to be received in a respective recess 63a, 63b which is located between two pairs of protruding fingers 67a, 67b which extend laterally from the side plate 14a. Furthermore, the shoulder regions 64a, 64b located adjacent to the flanges 62a, 62b on the spacer 60a are a snug fit within a rectangular recess 65 which formed between the pairs of protruding fingers 67a, 67b. The spacer is secured in place by passing bolts through the aligned in use bolt holes provided in the flanges 62a, 62b of the spacer 60a and of the respective pairs of fingers 67a, 67b at the side plate 14a.
Sleeves for open bodied pinch valves may be specified in terms of the ratio of the bore diameter to their length (2X, 3X, 4X etc). The arrangement shown in Figure 2 would suit a 3X specification sleeve, whilst the arrangement shown in Figure 4 would suit a 4X specification sleeve. If the spacers were omitted altogether, then the frame with flange supports attached directly to the side plates would suit a 2X specification sleeve, as shown in Figure 6.
The apparatus therefore provides a kit of side mounted spacer parts of various fixed lengths arranged to be joined to the flanges and pinch valve frame to form different lengths of the overall pinch valve structure, to support liners of greatly varying lengths. In one embodiment those side parts are in the form of side plates which are mounted and screwed together in an interlocking manner to the flanges and frame so as to provide a strong and stable 'cage-like' structure for supporting the liner.
Such a length adjustment arrangement has the advantage that some larger diameters of liners passing through the pinch valve structure can be supported more evenly over a greater length. This means that the device can have a smoother or more gradual curvature of liner into and out of the valve frame structure when there is a lengthy horizontal section in the central region between flanges. In use this means that there will be less internal wear on the liner because the flow is likely to be more laminar over a longer length. Turbulence of flow due to various bends, or in shorter liner lengths once pinched, can lead to more internal stress and abrasive wear by slurries on the interior liner walls.
In further embodiments the spacers can be of different general shape and configuration to the types shown in the drawings, for example as strips or bars, or even circular in shape. There can be other means of removeably joining the spacers to the side plates of the frame rather than the specific bolting arrangement that has been described, which may for example include different types of interference fit joints, or an attachment clip device. After a period of use of the pinch valve, the sleeve may become worn and require replacement. The procedure for replacing a sleeve will be described with reference to Figure 6. Referring to Figure 6, the bolts holding the lower flange support element (shown as half ring 24) in place have been removed, and the half ring 24 is shown removed from the valve frame 12a to allow removal and replacement of the sleeve (not shown). When the sleeve has been replaced by sliding it into position under the valve frame 12a, the half ring 24 can be pushed back into place and is held in position by a lip portion 26 which is located at the lateral side edge of the side plate 14a and upon which the arm 28 of the half ring 24 rests. In this way the frame supports the
lower flange support element whilst the fixing bolts are re-fitted. This obviates the need to support the weight of the lower flange element and associated sleeve whilst the bolts are being re-fitted and tightened, which improves ease of sleeve replacement and reduces the likelihood of injury to maintenance workers. In other embodiments, an equivalent lip portion 26 can be arranged on an end of the spacer 60a which is oriented in use to be furthest away from the side plate 14a. In still further embodiments, the arrangement of the frame, or of the spacer element, to retain the sleeve at the flange support element during replacement can be different to the shoulder arrangement described, and may include a resting portion of a different shape, such as an interference fit socket, for example, as long as it facilitates any easy sleeve replacement.
Referring to Figures 7 and 8, an open bodied pinch valve is shown with an attachment formation for attaching one of a selection of different types of valve actuators (see Figure 9). The attachment formation is shown in the form of a bracket 60 formed from welded sections of steel plate. The bracket 60 is bolted to a yoke 56 which is in turn fixed to two side arms 58 which themselves are in turn fixed to the lower pinch bar 52. In this way, the bracket 60 is fixed in relation to the lower pinch bar. The side bars 58 pass through apertures in upper pinch bar 54 and that pinch bar 54 is free to move with respect to the side bars58. In this way, in use the entire assembly of lower pinch bar 52, side bars 58, yoke 56 and the bracket 60 may move up and down in unison.
A stem 59 is fitted to the upper pinch bar 54 and passes through an aperture in the yoke 58. One of a selection of actuators may be used in conjunction with the valve. A housing of the actuator is bolted to the bracket 60. The moving part of the actuator is engaged with the stem 59. Therefore, movement of the moving part of the actuator in use has the effect of adjusting the distance between the upper pinch bar 54 and the bracket 60. At the same time, the location of bracket 60 can change with respect to the frame (comprising top plate 18, side plates 14a, 16a) of the valve shown. The assembly formed from bracket 60, yoke 56, side bars 58 and lower pinch bar 52 "floats" to balance out forces of the upper and lower pinch bars 52, 54 applied to the outside of the deformable tube or pipe 40.
Referring to Figures 9 to 12, a variety of different types of actuators may be provided to be used in conjunction with the valve such as a pneumatic actuator 62, a manual actuator 60, an hydraulic actuator 64 and an electrically powered actuator 66. In this way, a valve can be reconfigured in the field to work with different types of actuators to suit the application at hand.
It can be seen that the embodiments disclosed herein have at least one of the following advantages:
• The valve can be reconfigured to accommodate sleeves of varying lengths
• The lower flange support member is retained in position on the frame or bracket in the absence of securing bolts, to improve the ease of replacing the sleeve
• The valve can be used with a range of different types of valve actuators
In the foregoing description of preferred embodiments, specific terminology has been resorted to for the sake of clarity. However, the invention is not intended to be limited to the specific terms so selected, and it is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar technical purpose. Terms such as "front" and "rear", "inner" and "outer", "above", "below", "upper" and "lower", "horizontal" and "vertical" and the like are used as words of convenience to provide reference points and are not to be construed as limiting terms.
The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
In this specification, the word "comprising" is to be understood in its "open" sense, that is, in the sense of "including", and thus not limited to its "closed" sense, that is the sense of "consisting only of. A corresponding meaning is to be attributed to the corresponding words "comprise", "comprised" and "comprises" where they appear.
The preceding description is provided in relation to several embodiments which may share common characteristics and features. It is to be understood that one or more features of any one embodiment may be combinable with one or more features of the other embodiments. In addition, any single feature or combination of features in any of the embodiments may constitute additional embodiments.
Any inventions which have described in connection with what are presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the inventions. Also, the various embodiments described above may be implemented in conjunction with other embodiments, e.g., aspects of one embodiment may be combined with aspects of another embodiment to realize yet other embodiments. Further, each independent feature or component of any given assembly may constitute an additional embodiment.
Claims
1. An open bodied pinch valve including:
- a frame;
- a resilient liner including a bore;
- a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore;
- first and second flange supports which support respective first and second regions of the resilient liner;
- at least one of the flange supports is mounted to the frame and supported on the frame by way of interposed removable spacer members;
wherein the removable spacer members are replaceable by a respective spacer member of a different length, to effect adjustment of the distance between the flange supports to accommodate resilient liners of various lengths.
2. A pinch valve according to claim 1, wherein the removable spacer members mount to the frame at a joint which is formed by flanges which engage with recesses to align the spacer members with the frame.
3. A pinch valve according to either claim 1 or claim 2, wherein the removable spacer members mount to the frame at a joint which includes a rectangular recess to support the spacer member with respect to the frame.
4. A pinch valve system, the system including:
- a pinch valve according to any preceding claim; and
- a plurality of spacer members of different lengths.
5. A method of commissioning a pinch valve, the method including the steps of:
- providing a pinch valve system according to claim 4; and
- selecting spacer members from the available spacer members and fitting these to the pinch valve to provide a desired distance between the frame and the or each flange support members to suit a particular length of resilient liner.
6. An open bodied pinch valve including:
- a frame;
- a resilient liner including a bore;
- a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore; and
- first and second flange supports which support respective first and second regions of the resilient liner;
wherein the frame is arranged to retain a portion of each flange support element at a shoulder seat thereon.
7. A pinch valve according to claim 6, wherein a removable spacer member is located between the frame and at least one of the flange supports to retain the said portion of each flange support element at a shoulder seat thereon.
8. A pinch valve according to either of claim 6 or claim 7, wherein each flange support includes upper and lower flange support elements and either the frame or the spacer is arranged to retain a portion of the lower flange support element.
9. A pinch valve according to claim 7, wherein the removable spacer members mount to the frame at a joint which is formed by flanges which engage with recesses to align the spacer members with the frame.
10. A pinch valve according to claim 8, wherein the removable spacer members mount to the frame at a joint which includes a rectangular recess to support the spacer member with respect to the frame.
11. A method of replacing the liner of a pinch valve, the method including the steps of:
- providing a pinch valve according to any one of claims 6 to 10;
- removing at least a portion of each flange support to allow for removal of the liner;
- installing a replacement liner; and
- replacing the flange supports so that they are retained on the frame spacer attached to the frame..
12. A method of replacing the liner of a pinch valve as claimed in claim 11, the method further including the step of securing the replaced flange support elements in place with fasteners.
13. An open bodied pinch valve including:
- a frame;
- a resilient liner including a bore;
- a pinch mechanism for pinching the resilient liner to adjust the effective cross sectional area of the bore;
- first and second flange supports which support respective first and second regions of the resilient liner; and
- an attachment formation for attaching one of a selection of valve actuators to the valve.
14. A valve according to claim 13, wherein the pinch mechanism includes a lower pinch bar and an upper pinch bar, the attachment formation is provided in fixed spaced relation to the lower pinch bar and the actuator is arranged in use to adjust the distance between the upper pinch bar and the attachment formation.
15. An open bodied pinch valve according to either of claim 13 or claim 14,
wherein the selection of actuators includes a manually operated actuator.
16. An open bodied pinch valve according to either of claim 13 or claim 14,
wherein the selection of actuators includes an electrically operated actuator.
17. An open bodied pinch valve according to either of claim 13 or claim 14,
wherein the selection of actuators includes a hydraulically operated actuator.
18. An open bodied pinch valve according to either of claim 13 or claim 14,
wherein the selection of actuators includes a pneumatically operated actuator.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN2876CH2012 | 2012-07-16 | ||
| IN2876/CHE/2012 | 2012-07-16 | ||
| AU2012903118A AU2012903118A0 (en) | 2012-07-23 | An open bodied pinch valve | |
| AU2012903118 | 2012-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014012135A1 true WO2014012135A1 (en) | 2014-01-23 |
Family
ID=49948104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2013/000784 WO2014012135A1 (en) | 2012-07-16 | 2013-07-15 | An open bodied pinch valve |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2014012135A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322054A (en) * | 1980-12-29 | 1982-03-30 | Red Valve Company, Inc. | Pinch valve |
| US5657960A (en) * | 1994-05-26 | 1997-08-19 | Jindex Pty. Limited | Pinch valve |
| JP2004125167A (en) * | 2002-05-30 | 2004-04-22 | Raisen:Kk | Non-washing pinch valve |
| CN2828477Y (en) * | 2005-08-31 | 2006-10-18 | 东华工程科技股份有限公司 | Hose valve |
-
2013
- 2013-07-15 WO PCT/AU2013/000784 patent/WO2014012135A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4322054A (en) * | 1980-12-29 | 1982-03-30 | Red Valve Company, Inc. | Pinch valve |
| US5657960A (en) * | 1994-05-26 | 1997-08-19 | Jindex Pty. Limited | Pinch valve |
| JP2004125167A (en) * | 2002-05-30 | 2004-04-22 | Raisen:Kk | Non-washing pinch valve |
| CN2828477Y (en) * | 2005-08-31 | 2006-10-18 | 东华工程科技股份有限公司 | Hose valve |
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