GB2404654A - Cone shape closure device made of elastomeric material for store of flowable material - Google Patents
Cone shape closure device made of elastomeric material for store of flowable material Download PDFInfo
- Publication number
- GB2404654A GB2404654A GB0318610A GB0318610A GB2404654A GB 2404654 A GB2404654 A GB 2404654A GB 0318610 A GB0318610 A GB 0318610A GB 0318610 A GB0318610 A GB 0318610A GB 2404654 A GB2404654 A GB 2404654A
- Authority
- GB
- United Kingdom
- Prior art keywords
- closure device
- store
- wall
- rim
- flowable material
- 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- Withdrawn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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/54—Gates or closures
- B65D90/62—Gates or closures having closure members movable out of the plane of the opening
- B65D90/626—Gates or closures having closure members movable out of the plane of the opening having a linear motion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Closures For Containers (AREA)
- Auxiliary Methods And Devices For Loading And Unloading (AREA)
Abstract
A closure device 10 for closing the discharge opening, such as a hopper 20, of a store of flowable material e.g. powder or particulate material, has a conical form on its upper surface and is made of solid elastomeric material. The device has a sealing rim 12 at the bottom end of the cone, said rim having a tapered cross section for an improved sealing effect against the wall of the hopper 20. Also provided is a bottom cavity 14 defined by a cylindrical wall 13 at the base of the cone, for receiving part of an operating member which moves the closure device in its axial direction. The cylindrical wall 13 also tapers away from the base of the cone.
Description
1
2404654
IMPROVEMENTS IN OR RELATING TO CLOSURE DEVICES FOR STORES OF FLOWABLE MATERIAL
This invention relates to a closure device for a store of flowable material, such 5 as a silo or an intermediate bulk container, and to a store equipped with such a closure device.
It is well known, e.g. from GB-A-2348636, to provide a closure device in the form of a cone valve to close a discharge opening of a store (such as a hopper) of 10 flowable material, e.g. powder or other particulate material. These known valves are hollow and of plastic's material or flexible steel. The known valves will provide an effective seal against passage of cohesive powders but do not work without a separate seal for super fine powders.
15 According to a first aspect of the present invention, there is provided a closure device for a store of flowable material, the closure device being made of elastomeric material.
The closure device, being made of elastomeric material, will provide an 20 effective seal against passage not only of cohesive powders but also of super fine powders.
The closure device may be solid and have no enclosed cavities or confined spaces.
2
Preferably, the closure device has a conical upper portion and an endless rim at the lower end of the conical portion for sealing against a wall of the store. Advantageously, the thickness of the rim reduces as it extends away from the lower 5 end of the conical portion. This renders the free edge of the rim more flexible and improves its sealing abilities.
The closure device may further comprise an endless wall within the rim and projecting from the lower surface of the conical upper portion to define a recess for 10 receiving part of a closure operating member. In this case, the thickness of the endless wall may reduce as it extends away from the conical portion. This renders the free edge of the rim more flexible allowing it to make a further seal with the wall of the store.
15 According to a second aspect of the present invention, there is provided a store of flowable material having a closure device according to the first aspect of the invention and a discharge opening closable by the closure device.
The invention will now be more particularly described, by way of example, 20 with reference to the accompanying drawings, in which:
Figure 1 is a sectional view of one embodiment of a closure device according to the present invention, and
3
Figure 2 is a section taken through the closure device shown in Figure 1 and through part of a store to illustrate the manner in which the closure device seals to the wall of the store.
5 Referring to the drawings, the closure device 10 shown therein is intended to close the discharge opening of a store 20 (see Figure 2) of flowable particulate material, such as a silo or an intermediate bulk container containing powder or granular material, and is typically operated by a closure operating member movable upwardly by an actuator in a manner such as that described in GB-A-2348636.
10
The closure device 10 has a conical upper portion 11, an endless rim (or outer skirt) 12 at the lower end of the conical portion 11 for sealing against a wall of the store 20 and an endless wall (or inner skirt) 13 within the rim 12 and projecting from the lower surface of the conical upper portion 11 to define a recess 14 for receiving
15 part of a closure operating member in the form of a probe (not shown but see GB-A-2348636).
The closure device 10 is made of elastomeric material, typically rubber or polyethylene.
20
The closure device 10 may be solid with no enclosed cavities or confined spaces. It can thus be totally sanitary. In this case it can be injection moulded entirely of elastomeric material or can contain a steel insert 15 as shown.
4
As shown in Figure 2, both the rim 12 and the lower end of the wall 13 seal against the wall of the store 20.
The thickness of the rim 12 reduces as it extends away from the lower end of 5 the conical portion 11 and the thickness of the endless wall 13 gradually reduces in tapered manner as it extends away from the conical portion 11. Typically the thickness of the rim 12 and endless wall 13 both reduce down to about 3 mm at their free ends. This increases the flexibility of the rim 12 and the wall 13 and improves their sealing abilities to the wall of the store 20 and the probe, respectively. By using 10 elastomeric material for the closure device, it has been found that the closure device will provide an effective seal not only against passage of cohesive powders but also an effective seal against passage of super fine powders. This means that no separate gasket or seal has to be provided on the valve or the store and this renders the apparatus totally hygienic. Also, it is maintenance free and assembly/removal is made 15 simple.
The double seal, namely that provided between the endless rim 12 and the wall of the store 20 and that provided between the endless wall 13 and the wall of the store 20, ensures stability of the closure device with no tipping or leakage. The upper seal 20 between the rim 12 and the wall of the store 20 prevents or substantially prevents any product pressure on the lower seal between the wall 13 and the wall of the store 20 so that the lower seal only has to seal against dust and/or a small amount of product between the two seals. By contrast, a single soft seal at the outlet results in the product pressure forcing product through the outlet particularly as fine powders can
5
easily become fluidised and act like a low viscosity liquid. Furthermore, as the wall 13 is flexible, it will establish a good seal with a tapered closure operating member with the result that the only product exposed to atmosphere will be the thin ring of product dust at the bottom edge of the endless wall 13.
5
In use, the actuator will move the probe upwardly to open the closure device 10 and can then be operated to pulse the closure device upwards and downwards in order to break up powder above the upper surface of the conical portion 11 as more particularly described, for example, in GB-A-2348636.
10
15
6
Claims (9)
1. A closure device for a store of flowable material, the closure device being made of elastomeric material.
5
2. A closure device as claimed in claim 1, which is solid and has no enclosed cavities or confined spaces.
3. A closure device as claimed in claim 1 or claim 2, which has a conical upper 10 portion and an endless rim at the lower end of the conical portion for sealing against a wall of the store.
4. A closure device as claimed in claim 3, wherein the thickness of the rim reduces as it extends away from the lower end of the conical portion.
15
5. A closure device as claimed in claim 3 or claim 4, further comprising an endless wall within the rim and projecting from the lower surface of the conical upper portion to define a recess for receiving part of a closure operating member.
20
6. A closure device as claimed in claim 5, wherein the thickness of the endless wall reduces as it extends away from the conical portion.
7. A closure device for a store of flowable material, substantially as hereinbefore described with reference to the accompanying drawings.
8. A store of flowable material having a closure device as claimed in any the preceding claims and a discharge opening closable by the closure device.
9. A store as claimed in claim 8, in the form of a silo or intermediate bulk container.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0318610A GB2404654A (en) | 2003-08-08 | 2003-08-08 | Cone shape closure device made of elastomeric material for store of flowable material |
JP2004232548A JP2005059959A (en) | 2003-08-08 | 2004-08-09 | Improvement of closure unit for reservoir of fluent material or improvement of thing concerning this closure unit |
EP04254780A EP1505007A1 (en) | 2003-08-08 | 2004-08-09 | Closure device for stores of flowable material and store of flowable material having said closure device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0318610A GB2404654A (en) | 2003-08-08 | 2003-08-08 | Cone shape closure device made of elastomeric material for store of flowable material |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0318610D0 GB0318610D0 (en) | 2003-09-10 |
GB2404654A true GB2404654A (en) | 2005-02-09 |
Family
ID=27839858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0318610A Withdrawn GB2404654A (en) | 2003-08-08 | 2003-08-08 | Cone shape closure device made of elastomeric material for store of flowable material |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1505007A1 (en) |
JP (1) | JP2005059959A (en) |
GB (1) | GB2404654A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB626030A (en) * | 1947-07-19 | 1949-07-07 | Archibald Percy Thomas | Improvements in closure devices for sinks, baths, or wash-basins |
JPH01316198A (en) * | 1988-06-11 | 1989-12-21 | Takeshi Yamamoto | Paper-made carrier tape and its manufucture and metallic mold used in manufucture thereof |
NL9002241A (en) * | 1990-10-15 | 1992-05-06 | Zeger Cornelis Houtop | Solid conical plug to stop flow of product from silo - is pneumatically controlled and shaped to achieve reliable shake-proof seal |
GB2333287A (en) * | 1999-03-24 | 1999-07-21 | Ivan Semenenko | Material handling apparatus |
GB2380991A (en) * | 2001-10-18 | 2003-04-23 | Ivan Semenenko | Material handling apparatus with deformable valve body |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1575873A (en) * | 1968-05-31 | 1969-07-25 | ||
AU712291B2 (en) * | 1994-07-11 | 1999-11-04 | Matcon (R & D) Limited | Material handling apparatus |
AU6825496A (en) * | 1995-08-25 | 1997-03-19 | Matcon (R & D) Limited | Material handling apparatus |
GB9812204D0 (en) * | 1998-06-05 | 1998-08-05 | Matcon R & D Ltd | A seal device |
-
2003
- 2003-08-08 GB GB0318610A patent/GB2404654A/en not_active Withdrawn
-
2004
- 2004-08-09 EP EP04254780A patent/EP1505007A1/en not_active Withdrawn
- 2004-08-09 JP JP2004232548A patent/JP2005059959A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB626030A (en) * | 1947-07-19 | 1949-07-07 | Archibald Percy Thomas | Improvements in closure devices for sinks, baths, or wash-basins |
JPH01316198A (en) * | 1988-06-11 | 1989-12-21 | Takeshi Yamamoto | Paper-made carrier tape and its manufucture and metallic mold used in manufucture thereof |
NL9002241A (en) * | 1990-10-15 | 1992-05-06 | Zeger Cornelis Houtop | Solid conical plug to stop flow of product from silo - is pneumatically controlled and shaped to achieve reliable shake-proof seal |
GB2333287A (en) * | 1999-03-24 | 1999-07-21 | Ivan Semenenko | Material handling apparatus |
GB2380991A (en) * | 2001-10-18 | 2003-04-23 | Ivan Semenenko | Material handling apparatus with deformable valve body |
Also Published As
Publication number | Publication date |
---|---|
GB0318610D0 (en) | 2003-09-10 |
JP2005059959A (en) | 2005-03-10 |
EP1505007A1 (en) | 2005-02-09 |
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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) |