WO2008012670A1 - Device consisting of modular elements for the electrical insulation of pipes - Google Patents
Device consisting of modular elements for the electrical insulation of pipes Download PDFInfo
- Publication number
- WO2008012670A1 WO2008012670A1 PCT/IB2007/002160 IB2007002160W WO2008012670A1 WO 2008012670 A1 WO2008012670 A1 WO 2008012670A1 IB 2007002160 W IB2007002160 W IB 2007002160W WO 2008012670 A1 WO2008012670 A1 WO 2008012670A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- insulator
- duct
- previous
- elements
- Prior art date
Links
- 238000010292 electrical insulation Methods 0.000 title claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000012212 insulator Substances 0.000 claims abstract description 47
- 239000011810 insulating material Substances 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 4
- 240000005428 Pistacia lentiscus Species 0.000 claims description 2
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000012777 electrically insulating material Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 9
- 241000196324 Embryophyta Species 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000004224 protection Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/02—Electrically insulating joints or couplings
- F16L25/028—Electrically insulating joints or couplings for branching pipes, for joining pipes to walls
-
- 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
- F24H9/00—Details
- F24H9/12—Arrangements for connecting heaters to circulation pipes
- F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
-
- 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
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
Definitions
- the object of the present invention is a safety device of the type suitable for preventing dangerous electric discharges from being transmitted from a first portion of metal piping to a second consecutive portion; in particular, such electrical discharges from being transmitted from an electrical storage or instant water heater, 5 to user-accessible parts.
- Breakage of the outer sheath allows the water contained in the tank to contact the resistive filament, so that the water is under power and therewith, all the electrically conductive parts connected thereto.
- the installer should not connect the water heater if the electrical plant is not regular; in some areas or countries, however, it is not safe to rely upon the sense of responsibility of the installer.
- the active protection type uses electronic and electromechanical means and consists in a device interposed between the electrical plant of the water heater and the current socket, which detects any anomalies in the electrical plant; if found, the device prevents the electrical connection of the water heater to the mains.
- Devices of this type are not cumbersome and substantially do not alter the architecture of the water heater, but exhibit the drawback that a fault thereof could allow dangerous situations.
- the passive protection type ensures full electrical insulation of the water heater from any part that could come into contact with the user and this occurs through two different devices: insulation of the accessible metal parts of the water heater: all the normally accessible metal parts of the water heater (enclosure and wall brackets, for example) are electrically insulated from the inside metal parts and from water; insulation of the water heater from all the user accessible pipes by a pair of devices hereinafter called water insulators; water insulators are static devices interposed between the hydraulic connections of a water heater and the corresponding delivery and collecting pipes, so that the incoming and outgoing water from the water heater flows therethrough, in a duct made of electrically insulating material and sufficiently long to prevent currents with dangerous or in any case undesired value from passing through the water contained therein, despite being electrically conductive.
- water path shall be used to mean the length of the path the electrical current must flow through from a first conductive element of the water heater, subject to a predetermined electrical potential, along pipes or ducts of insulating material, up to a second conductive element separate from the water heater, and directly or indirectly accessible by a user subject to a different potential (in particular to the ground potential).
- the minimum length of the water path that prevents dangerous or undesired electrical discharges is proportional to the electrical conductivity of water that could greatly vary according to the zone or to the Country, depending on the quantity of substances dissolved in water.
- the electrical conductivity measured in some places follows. Place Conductivity ( ⁇ S/cm)
- Water insulators have been used for a few years in emerging countries as safety device for the above reasons. Several technical solutions thereof exist, but they all substantially consist in pipe portions of plastic material interposed between water heater and water network.
- the general object of the present invention is to reduce, at least partly, the drawbacks mentioned hereinabove.
- a specific object of the present invention is to indicate water insulators with a compact shape so that the overall volume thereof is reduced as much as possible relative to the length of the water path obtained.
- a further specific object of the present invention is to indicate water insulators wherein the length of the water path is easily changeable according to the electrical conductivity of water.
- a further object of the present invention is to indicate water insulators whose appearance should be pleasant.
- Fig. 1 shows a schematic view, in section, of a water insulator according to a possible variation of the invention, with elements first separate from each other and then combined.
- Fig. 2 shows a schematic view, in section, of a water insulator according to other possible embodiments of the invention.
- Fig. 3 shows a schematic view of the bottom and top faces of some of the end and modular elements, provided in the water insulator according to possible embodiments of the invention.
- Fig. 4 shows a schematic view of the bottom and top faces of some of the end and modular elements, provided in the water insulator according to other possible embodiments of the invention.
- Fig. 5 shows a schematic front view of the bottom and top faces of some of the end and modular elements, provided in the water insulator according to further possible embodiment of the invention.
- Fig. 6 shows a view of the end and modular elements, first separate from each other and then combined, provided in the water insulator according to a possible embodiment of the invention.
- Fig. 7 shows a front view of the bottom face of a first modular element provided in the water insulator of fig. 6.
- Fig. 8 shows a front view of the top face of said first modular element provided in the water insulator of fig. 6.
- Fig. 9 shows a front view of the bottom face of a second modular element provided in the water insulator of fig. 6.
- Fig. 10 shows a front view of the top face of said second modular element provided in the water insulator of fig. 6.
- Fig. 11 shows a perspective view, in section, of the water insulator of fig. 6.
- Fig. 12 shows a view, in section, of a detail of a possible connection of the elements provided in the water insulator according to the invention to each other, first separate from each other and then combined.
- Fig. 13 shows a view, in section, of a water heater with two water insulators according to the invention mounted at the water inlet and outlet.
- the water insulator according to the invention envisages: a pile of elements of an insulating material between whose opposite faces winding ducts for water flow are obtained; the fact that some of said elements of insulating material are modular and can be added at will in a repetitive manner, so as to adjust the length of the water path according to the electrical resistance required.
- Figs. 1 and 2 show, according to two embodiments, a water insulator 1 consisting of a pile of multiple elements 2, 3, 4, 5.
- a first connector 2 provided with means 201 for the hydraulic connection to the water heater or to the pipes, is shown.
- the top face Sup of said connector 2 contacts the bottom face Inf of a first distributor 3, whose top face Sup in turn contacts the bottom face Inf of a first type modular element 4, which accordingly, has the top face Sup contacting the bottom one Inf of a second type modular element 5 which in turn, at the top may be provided, even if not shown in the figure, with a first type modular element 4 again, which may be followed by a further second type modular element 5, and so on, up to end the hydraulic pipe connection with a second distributor 3 and a second connector 2.
- each element 2, 3, 4, 5 of said pile is provided with a channel 801 dug on at least one of the faces thereof and a passage 802; the latter crosses the entire thickness of each element 2, 3, 4, 5 and is arranged in such position as to put in communication the second end of a first channel 801, arranged at a face of said element 2, 3, 4, 5, with the first end of a second channel 801, arranged at the other face of element 2, 3, 4, 5 itself.
- channels 801 arranged at a face of a generic element 2, 3, 4, 5 it is not meant that the channels themselves are necessarily dug on the face itself.
- said channels 801 may be arranged on a single face (reference shall be made to fig. 2) or on both (reference shall be made to fig. 1) of said elements 2, 3, 4, 5 but if they are arranged on both faces, those arranged on two faces intended for being contacted to each other match in their pattern.
- elements 2, 3, 4, 5 provided with channels 801 may be alternating with diaphragms D (not shown) without channels 801, provided that said diaphragms D are provided with at least one passage 802 intended for establishing the connections described above.
- a diaphragm D may usefully consist, for example, of a flat seal of elastic material, intended for separating the two channels 801 of the two elements 2, 3, 4, 5, between which diaphragm D itself is tightened, putting in communication said channels 801 only by passage 802 it is provided with.
- FIGs. 3, 4 and 5 show, in a schematic manner, in a sequence from the left rightwards and separated by a dash and dot line, the bottom face Inf and the top one Sup of possible elements 2, 3, 4, and 5 which, for graphical simplicity, are shown in a square plan shape.
- each top face Sup is shown in the view obtained by upturning each element 2, 3, 4, 5 according to said vertical dash and dot lines.
- each side face of elements 2, 3, 4, and 5 is marked by letters A, B, C and D; the pile assembly takes place by placing the faces identified by the same letter A, B, C and D on the same side of the pile itself.
- the bottom face Inf of each element 2, 3, 4, and 5, with reference to any side A, B, C and D, has a channel 801 that is the mirror image of that provided on the top face Sup of element 2, 3, 4 or 5 that precedes it in the pile.
- said first and second type modular elements 4 and 5 may be identical or different from each other.
- said first and second type modular elements 4 and 5 have spiral channels 801 with passages 802 alternately at the periphery and at the centre of the modular elements themselves and, at least for this reason, they are different from each other, whereas in fig. 3, which shows first and second type modular elements 4 and 5 with coil channels 801 and passages 802 always placed in the same position, it can be noted that the second type modular element 5 may consist in the first type modular element 4 rotated by 180°.
- FIG. 5 shows another possible group of embodiments of the invention, wherein a single connector-distributor element 23 carries out the functions separately carried out by connectors 2 and distributors 3 of the previous examples.
- Connectors 2 and distributors 3, or connectors-distributors 23, arranged at an end of the water insulator 1, may be identical or different from those arranged at the other end, according to the shape of the first and second type modular elements 4 and 5 facing thereto.
- said means 201 for the hydraulic connection to the water heater or to the metal pipes connectors 2 and connectors-distributors 23 are provided with may consist without distinction of male or female threaded inlets.
- Figs. 6 to 11 show a possible practical embodiment of the water insulator 1 with spiral ducts 8. The identification numbers used are the same already used in the previous figures.
- Such sealing of channels 801 that make the sections of duct 8 may also be provided in several manners, also according to the material used for said elements 2, 3, 4, 5, 23 which, in any case, preferably, is a thermoplastic material with sufficient mechanical and thermal features; for example, polyamide charged with fibreglass according to percentages of 30 - 40%.
- a first sealing means may consist in suitably shaped rubber seals, for example the already mentioned diaphragms D, interposed between each bottom face Inf and corresponding top one Sup.
- a second means may consist in the application of sealing mastics.
- the preferred means consists in ultrasound welding of each element 2, 3, 4, 5, 23 to the next one, which is very reliable as regards completeness of the sealing and tensile strength.
- Fig. 12 shows a detail of the connection between two generic consecutive elements 2, 3, 4, 5, 23, before and after the ultrasound welding process; a first element 2, 3, 4, 5 or 23, on the top face Sup exhibits a groove 9 which runs adjacent all the edges of channels 801, whereas the other element 2, 3, 4, 5 or 23, on the bottom face Inf exhibits a rib 10 intended for inserting in said groove 9.
- Rib 10 ends with a sharp edge 1001 which, during the ultrasound welding, in known manner, e is made to press against bottom 901 of groove 9, acting as trigger for the local fusion made by the welding, and once fused, filling and closing groove 9.
- Fig. 13 finally shows an electrical storage water heater 11 heated by an electrical resistance 1101, wherein the cold water enters through pipe 1102 and exits through pipe 1103. Both outer ends of said pipes 1102 and 1103 are connected to the water network 1104 by two water insulators 1.
- the water insulator 1 has been described so far as a safety device against electrical discharges to be applied to electrical storage water heaters 11, but it can also be used in electrical instant water heaters 11 and in general, wherever the risk of transmission, through water and/or metal pipes, of electrical currents with dangerous or in any case harmful intensity (for example causing corrosion phenomena) should be avoided, interposing it between two sections of said metal piping.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Resistance Heating (AREA)
- Pipe Accessories (AREA)
- Thermal Insulation (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800202529A CN101460786B (en) | 2006-07-28 | 2007-07-19 | Water insulator and electric water heater using the water insulator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000047A ITAN20060047A1 (en) | 2006-07-28 | 2006-07-28 | DEVICE CONSISTING OF MODULAR SCREWS FOR ELECTRIC PIPE INSULATION |
ITAN2006A000047 | 2006-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008012670A1 true WO2008012670A1 (en) | 2008-01-31 |
Family
ID=38669951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2007/002160 WO2008012670A1 (en) | 2006-07-28 | 2007-07-19 | Device consisting of modular elements for the electrical insulation of pipes |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN101460786B (en) |
IT (1) | ITAN20060047A1 (en) |
RU (1) | RU2426953C2 (en) |
WO (1) | WO2008012670A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103591696A (en) * | 2013-11-10 | 2014-02-19 | 李松 | Electric leakage protection device of electric water heater |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2257385A (en) * | 1939-09-11 | 1941-09-30 | John G Keegan | Storage water heater |
US5277171A (en) * | 1993-02-02 | 1994-01-11 | Bradford-White Corporation | Water heater heat trap |
NL9400990A (en) * | 1994-06-17 | 1996-02-01 | Angli Tech Enterprise | Electrically insulating pipe coupling |
FR2754046A1 (en) * | 1996-10-02 | 1998-04-03 | Comap Sdh | Safety valve connector for hot water tank |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6282783B1 (en) * | 1999-04-09 | 2001-09-04 | Ngk Insulators, Ltd. | Composite electrical insulator, method of assembling same and method of manufacturing same |
-
2006
- 2006-07-28 IT IT000047A patent/ITAN20060047A1/en unknown
-
2007
- 2007-07-19 CN CN2007800202529A patent/CN101460786B/en not_active Expired - Fee Related
- 2007-07-19 RU RU2008144465/06A patent/RU2426953C2/en not_active IP Right Cessation
- 2007-07-19 WO PCT/IB2007/002160 patent/WO2008012670A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2257385A (en) * | 1939-09-11 | 1941-09-30 | John G Keegan | Storage water heater |
US5277171A (en) * | 1993-02-02 | 1994-01-11 | Bradford-White Corporation | Water heater heat trap |
NL9400990A (en) * | 1994-06-17 | 1996-02-01 | Angli Tech Enterprise | Electrically insulating pipe coupling |
FR2754046A1 (en) * | 1996-10-02 | 1998-04-03 | Comap Sdh | Safety valve connector for hot water tank |
Also Published As
Publication number | Publication date |
---|---|
RU2426953C2 (en) | 2011-08-20 |
CN101460786A (en) | 2009-06-17 |
RU2008144465A (en) | 2010-09-10 |
CN101460786B (en) | 2012-07-18 |
ITAN20060047A1 (en) | 2008-01-29 |
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