EP2276979A2 - Plastic and fibreglass flange for surge tanks - Google Patents
Plastic and fibreglass flange for surge tanksInfo
- Publication number
- EP2276979A2 EP2276979A2 EP09742474A EP09742474A EP2276979A2 EP 2276979 A2 EP2276979 A2 EP 2276979A2 EP 09742474 A EP09742474 A EP 09742474A EP 09742474 A EP09742474 A EP 09742474A EP 2276979 A2 EP2276979 A2 EP 2276979A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- flange according
- fibreglass
- surge tanks
- holes
- 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- Withdrawn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
- 239000011152 fibreglass Substances 0.000 title claims abstract description 8
- 239000004033 plastic Substances 0.000 title abstract description 3
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004743 Polypropylene Substances 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
Definitions
- the present patent relates to the sector of surge tanks for pumps and boilers, and particularly concerns a new flange made of a fibreglass-reinforced plastic material for assembling on such surge tanks.
- a known type of flange comprises a stainless steel plate with a welded threaded connection on the plate and 6 holes homogeneously distributed around its circumference. Said flange is suitable for being assembled on the body of a surge tank, on a flat threaded ring, by tightening it in place with 6 corresponding screws. The edge of the butyl (or other elastomer) membrane in the surge tank is inserted between the flange and the ring to serve as a seal.
- Another type of known flange consists of a galvanised steel plate complete, as in the previous case, with a threaded connection welded onto the plate and 6 holes evenly distributed around its circumference. Said flange is designed to be assembled on the body of the surge tank on a flat threaded ring, by tightening it in place with 6 corresponding screws. The edge of the butyl (or other elastomer) membrane in the surge tank is inserted between the flange and the ring to serve as a seal.
- the second being made of galvanised steel, is more vulnerable to the aggressive action of the water and has production costs that, though lower than in the former case, are still high.
- thermoformed flange preferably made of polypropylene and fibreglass, for assembling on surge tanks.
- the main technical aim of the new type of flange is to eliminate the above- mentioned drawbacks of the known state of the art.
- an important object of the present invention is to reduce the production costs, without affecting the quality level and efficacy of the flange. Another important object of the present invention is to eliminate the corrosive-oxidising effects due to the action of the water. Another important object of the present invention is to ensure compliance with non-toxic requirements for use with foodstuffs. Another important object of the present invention is to be completely suitable for recycling.
- thermoformed flange for assembling on surge tanks, made of polypropylene and fibreglass.
- Figure 1 shows a cross-sectional view of the flange
- Figure 2 shows a view from above
- - Figure 3 shows a view from above of the flange in a possible embodiment with four holes (F1-F4).
- the flange (A) is circular in shape and complete with 4 or 6 holes, (F1-F4 or Fl -F 6), evenly distributed around its circumference and suitable for containing screws for fixing the flange to the surge tank. Coinciding with said holes, there are suitable seats (S1-S4 or S1-S6) designed to provide ample space for the insertion of fixing tools.
- the flange (A) comprises a threaded connection (B) located at its centre and designed for its connection to the hydraulic system.
- the flange has the geometrical shape of a dome (Al), the lower portion (A2) being concave, designed to make the flange stronger and to reduce the quantity of material required.
- the flange can also be thermoformed in another geometrical shape comprising a cylindrical disc-shaped body with suitable holes for the fixing screws, and with cross walls in the upper portion, again for the purpose of reducing the quantity of material required and increasing its strength.
- the geometries obtained ensure a perfect geometrical compatibility with the surge tank on which the flange is assembled and the tightness of the seal assured by the butyl (or other elastomer) surge tank lining.
- thermoformed flange is preferably made of a polypropylene (Tecnoprene) and fibreglass.
- this plastic material was found the most suitable for various reasons: it is certified as non-toxic by the Food and Drug Administration and consequently suitable for applications with foodstuffs; it is unaffected by the corrosive-oxidising effect of water; • it is fully recyclable. From the tests conducted, the flange was found amply compatible with the temperatures and pressures to which it is submitted even in extreme working conditions.
Abstract
The present patent relates to the sector of surge tanks for pumps and boilers, and particularly concerns a new flange made of plastic and fibreglass for assembling on surge tanks. The flange has a dome-like geometrical shape, that is concave on the underside, designed to reinforce it and to reduce the amount of material needed to make it. Said flange is distinctive in that it is shaped so as to ensure perfect geometrical compatibility with the surge tank on which it is assembled and the tightness of the butyl (or other material) seal.
Description
PLASTICAND FIBREGLASS FLANGE FOR SURGE TANKS
DESCRIPTION
The present patent relates to the sector of surge tanks for pumps and boilers, and particularly concerns a new flange made of a fibreglass-reinforced plastic material for assembling on such surge tanks.
In the sector of surge tanks for pumps and boilers, there are currently various known types of flange for assembling on surge tanks. A known type of flange comprises a stainless steel plate with a welded threaded connection on the plate and 6 holes homogeneously distributed around its circumference. Said flange is suitable for being assembled on the body of a surge tank, on a flat threaded ring, by tightening it in place with 6 corresponding screws. The edge of the butyl (or other elastomer) membrane in the surge tank is inserted between the flange and the ring to serve as a seal. Another type of known flange consists of a galvanised steel plate complete, as in the previous case, with a threaded connection welded onto the plate and 6 holes evenly distributed around its circumference. Said flange is designed to be assembled on the body of the surge tank on a flat threaded ring, by tightening it in place with 6 corresponding screws. The edge of the butyl (or other elastomer) membrane in the surge tank is inserted between the flange and the ring to serve as a seal.
The above-described types of flange for assembling on surge tanks have several drawbacks. While the first type, being made of stainless steel, affords a high level of resistance to the effects of corrosion or oxidation in contact with the water on the one hand, on the other it entails particularly high production costs.
The second, being made of galvanised steel, is more vulnerable to the aggressive action of the water and has production costs that, though lower
than in the former case, are still high.
To overcome the above-mentioned drawbacks, a new type of thermoformed flange has been designed, preferably made of polypropylene and fibreglass, for assembling on surge tanks. The main technical aim of the new type of flange is to eliminate the above- mentioned drawbacks of the known state of the art.
As part of the main goal, an important object of the present invention is to reduce the production costs, without affecting the quality level and efficacy of the flange. Another important object of the present invention is to eliminate the corrosive-oxidising effects due to the action of the water. Another important object of the present invention is to ensure compliance with non-toxic requirements for use with foodstuffs. Another important object of the present invention is to be completely suitable for recycling.
These and other direct and complementary objects are achieved by the new invention, a thermoformed flange for assembling on surge tanks, made of polypropylene and fibreglass. The characteristics of the new invention are better clarified by the description that follows, with reference to the drawings, which are attached as a non-limiting example.
The attached drawing gives a non-limiting example of a practical embodiment of the invention.
Figure 1 shows a cross-sectional view of the flange; Figure 2 shows a view from above; - Figure 3 shows a view from above of the flange in a possible embodiment with four holes (F1-F4).
With reference to the figures previously mentioned and presented in the attached drawing 1, the flange (A) is circular in shape and complete with 4
or 6 holes, (F1-F4 or Fl -F 6), evenly distributed around its circumference and suitable for containing screws for fixing the flange to the surge tank. Coinciding with said holes, there are suitable seats (S1-S4 or S1-S6) designed to provide ample space for the insertion of fixing tools. The flange (A) comprises a threaded connection (B) located at its centre and designed for its connection to the hydraulic system. As shown in the cross-sectional view in fig.1, the flange has the geometrical shape of a dome (Al), the lower portion (A2) being concave, designed to make the flange stronger and to reduce the quantity of material required. The flange can also be thermoformed in another geometrical shape comprising a cylindrical disc-shaped body with suitable holes for the fixing screws, and with cross walls in the upper portion, again for the purpose of reducing the quantity of material required and increasing its strength. The geometries obtained ensure a perfect geometrical compatibility with the surge tank on which the flange is assembled and the tightness of the seal assured by the butyl (or other elastomer) surge tank lining. Moreover, this shaping is straightforward and suitable for enabling the flange to be manufactured by injection moulding, with a consequently marked reduction in production costs. The new thermoformed flange is preferably made of a polypropylene (Tecnoprene) and fibreglass.
From studies conducted, this plastic material was found the most suitable for various reasons: it is certified as non-toxic by the Food and Drug Administration and consequently suitable for applications with foodstuffs; it is unaffected by the corrosive-oxidising effect of water; • it is fully recyclable. From the tests conducted, the flange was found amply compatible with the
temperatures and pressures to which it is submitted even in extreme working conditions.
In practice, it was established that the present invention provides a solution to the previously-stated technical goal and objects. Thus, with reference to the above description and to the attached drawing, the following claims are advanced.
Claims
1. A flange for assembling on surge tanks in water, heating and sanitary systems, characterised in that it is made of a thermoformed material consisting of polypropylene and fibreglass.
2. A flange according to claim 1, characterised in that it comprises a circular crown on its underside, with suitable holes for containing fixing screws.
3, A flange according to claim 1 and 2, characterised in that it can comprise an upper portion with a dome-shaped upper surface and a concave lower surface.
4 A flange according to claims I5 2, characterised in that it can comprise an upper portion with a circular body with upper reinforcement cross walls.
5, A flange according to claims 1, 2, 3 and 4, characterised in that, in the upper portion, it comprises a threaded connection thermoformed therewith, suitable for ensuring the flange's connection to the hydraulic system.
6. A flange according to claims 1, 2, 3, 4 and 5, characterised in that said material consists of the polypropylene Tecnoprene.
7. A flange according to claims 1, 2, 3, 4, 5 and 6, characterised in that said thermoformed material contains fibreglass.
8, A flange according to claims 1, 2, 3, 4 and 5, characterised in that it comprises fixing holes and seats that are wider than the holes for the corresponding screws, in order to provide sufficient space for the fixing tools.
9, A flange according to any or any combination of the previous claims, characterised in that it comprises all the above-described characteristics, as shown and claimed in the present patent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000138A ITPD20080138A1 (en) | 2008-05-07 | 2008-05-07 | FLANGE IN PLASTIC MATERIAL AND GLASS FIBER FOR EXPANSION VESSELS |
| PCT/IB2009/051219 WO2009136301A2 (en) | 2008-05-07 | 2009-03-24 | Plastic and fibreglass flange for surge tanks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2276979A2 true EP2276979A2 (en) | 2011-01-26 |
Family
ID=40302916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09742474A Withdrawn EP2276979A2 (en) | 2008-05-07 | 2009-03-24 | Plastic and fibreglass flange for surge tanks |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110049162A1 (en) |
| EP (1) | EP2276979A2 (en) |
| IT (1) | ITPD20080138A1 (en) |
| WO (1) | WO2009136301A2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020171739A1 (en) | 2019-02-21 | 2020-08-27 | Yazykov Andrey Yurievich | Flange |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2109316A (en) * | 1936-05-16 | 1938-02-22 | Harley Davidson Motor Co Inc | Oil tank and battery assembly |
| US2340125A (en) * | 1942-01-14 | 1944-01-25 | Chrysler Corp | Fluid pressure accumulator |
| US2833325A (en) * | 1954-02-09 | 1958-05-06 | Nat Screw & Mfg Company | Countersunk flexible head threaded fastener |
| US3016463A (en) * | 1958-04-28 | 1962-01-09 | Smith Corp A O | Multi-layer vessel having a neutron absorbing layer |
| US3082022A (en) * | 1958-11-03 | 1963-03-19 | James A Moore | Coupling for plastic pipe having segmented interlocked clamping rings |
| US3214201A (en) * | 1962-05-29 | 1965-10-26 | Ceilcote Company Inc | Pipe flange |
| US3368787A (en) * | 1964-08-26 | 1968-02-13 | Texsteam Corp | Flow regulator with radially expanding elastomeric block |
| US3282459A (en) * | 1964-10-02 | 1966-11-01 | Allis Chalmers Mfg Co | Pressure vessel having concentric casings |
| US3380470A (en) * | 1965-11-30 | 1968-04-30 | Texsteam Corp | Flow regulator with radially expanding elastomeric block |
| GB1599363A (en) * | 1977-03-31 | 1981-09-30 | Wavin Bv | Fibre reinforced thermosetting resin pipe part |
| US5320752A (en) * | 1992-11-03 | 1994-06-14 | Clack Corporation | Water purification system employing modular flat filter assembly |
| DE19953746C2 (en) * | 1999-06-21 | 2001-10-04 | Rasmussen Gmbh | Method of making a nozzle |
| ITPD20050191A1 (en) * | 2005-06-24 | 2006-12-25 | Zilmet Spa | THREADED FITTING FOR EXPANSION TANKS, TANKS AND THE LIKE |
| US8992775B2 (en) * | 2006-10-31 | 2015-03-31 | Pentair Water Pool And Spa, Inc. | Diatomaceous earth filter apparatus and method |
-
2008
- 2008-05-07 IT IT000138A patent/ITPD20080138A1/en unknown
-
2009
- 2009-03-24 US US12/989,391 patent/US20110049162A1/en not_active Abandoned
- 2009-03-24 WO PCT/IB2009/051219 patent/WO2009136301A2/en active Application Filing
- 2009-03-24 EP EP09742474A patent/EP2276979A2/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009136301A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20110049162A1 (en) | 2011-03-03 |
| WO2009136301A3 (en) | 2013-01-24 |
| WO2009136301A2 (en) | 2009-11-12 |
| ITPD20080138A1 (en) | 2009-11-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20101007 |
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| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
|
| AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
| DAX | Request for extension of the european patent (deleted) | ||
| R17D | Deferred search report published (corrected) |
Effective date: 20130124 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20130813 |