AN ARRANGEMENT FOR CONNECTING RADIATORS TO CIRCULATION PIPES

Abstract: An arrangement for connecting a radiator (10, 11) for water-carried heat to a pair of water-supply and water-exhaust pipes (12, 13) includes an upper connector head (14) which conducts hot water to the upper part of the radiator (10, 11), a bottom connector head (15) which receives cold or cooled water from the bottom part of the radiator (10, 11), and a cold water outlet (27), a riser pipe (16) which extends between the connector heads (14, 15), and a coupling piece (31) having two connector stubs (32, 33) which are connected to the pair of supply and exhaust pipes (12, 13), and an oppositely directed coupling stub (34) which extends symmetrically between the connector stubs and which is connected to the outlet (27). The coupling stub (34) communicates with one (13) of the connector stubs via a first channel arrangement (36-38), whereas the other connector stub (12) communicates with the bottom end (26) of the riser pipe (16) via a second channel arrangement (39-41). The second channel arrangement (39-41) includes a tubular piece (41) which is firmly connected to the coupling piece (31) and which has a free end (42) that extends coaxially with the coupling stub (34). This end (42) of the tubular piece and the bottom end (26) of the riser pipe are inserted sealingly one within the other, wherein the outer diameter of the tubular piece (41) in the region of the coupling stub (34) is smaller than the inner diameter of the coupling stub.

Description: An arrangement-for connecting radiators to circulation pipes The present invention relates to an arrangement for connecting a radiator for water-carried heat to an upwardly extending pair of water-supply and wate -ex- haust pipes for carrying respectively hot water and cold water which has been cooled in the radiator, wherein the arrangement includes an upper connector head having an inner chamber vhich is provided with a hot water inlet and which is connected to the upper part of the radiator via at least one hot water outlet, a bottom connector head having an inner chamber which inclu es a cold water cutlet and which is connected to the bottom part of the radiator via at least one cold wa inlet, a hot water riser pipe having an upper outlet end which is connected to the chaπriber inlet of the-.upper conn head and a bottom inlet end of circular cross-secticn wh passes into the chamber in the bottom connector head and extends coaxially with the chamber outlet, and a couplin piece having two connecter stubs intended for connection said pair of water-supply an water-exhaust pipes and an oppositely directed coupling stub which extends in the same plane as and centrally between the aforesaid con¬ nector stubs, said coupling stub communicating with one of the connector stubs via a first channel arrangement in the interior of the connector piece, while the ether of said connector stubs is intended for connection to the bottom inlet end of the riser pipe via a second channel arrangement in the interior of the connecter piece. An arrangement of this general kind is described in European Patent Application 91850027.3. The arrangement taught in this application has a transfer sleeve which _ is housed in the bottom connector head and which has an SUBSTITUTESHEET upper cylindrical end-part connected rotatably to the bottom end of the riser pipe, and an opposing end-part which is configured so that when the transfer sleeve is rotated axially through, for example, an angle of 180° from a first position in which it communicates with the first channel arrangement in the coupling piece to a second position, said opposing end-part will communicate with the second channel arrangement in the connector piece. Thus, subsequent to emptying the radiator and disconnecting the coupling piece, the transfer sleeve can be rotated from one to the other of said positions with the aid of a suitable tool, thereby ensuring the desired direction of flow through the radiator irrespec¬ tive of the mutual position of the supply and exhaust pipes. This manipulation of the transfer sleeve can cause difficul ies, because of the position of the sleeve and the limited working space available. Further¬ more, because of the movability of the sleeve in relation to both the riser pipe and the coupling piece, sealing problems may occur in preventing leakage at the ends of th sleeve when different pressures prevail in the inside and on the outside of the sleeve, which is the case in radiators which, for instance, have a thermostat-con¬ trolled adjuster valve mounted in the upper connector head. The object of the present invention is to provide a novel and advantageous connection arrangement which can be readily adjusted to ensure that the desired flow direction through the radiator is achieved, and which is. so constructed as to be fully sealed, even when the radiator control valve is positioned in the upper connector head. To this end, it is proposed in accordance with the invention that in a connection arrangement of the aforedescribed kind, the second channel arrangement includes a tubular piece which is connected firmly to the connector piece and which has a free end of circular cross-section which extends coaxially with the coupling stub, wherein said end of the tubular piece and the bottom end of the riser pipe, with the coupling stub connected to the bottom coupling piece sealingly extend one into the other, and wherein the outer diameter of the tubular piece is smaller than the inner diameter of the coupling stub in the region of said stub. This arrangement will ensure that the desired flow direction through the radiator can be obtained irrespec¬ tive of the mutual position of the supply and exhaust pipes, simply by rotating the coupling piece through 180" after disconnecting said coupling piece from said pipes and from the radiator. The sealing connection between the riser pipe and the second channel arrange¬ ment can be maintained during the entire adjustment process. Further characteristic features of the invention and advantages afforded thereby will be evident from the subsidiary Claims and from the following description of embodiments of the invention with reference to the accompanying drawings, in which Figure 1 is a sectional view taken on the line I-I in Figure 2, illustrating a first embodiment of the inventive coupling arrangement positioned between two radiators; Figure 2 is a sectional view of the coupling arrange¬ ment illustrated in Figure 1, said view being taken at 90° to Figure 1; Figure 3 illustrates in side view and partly in section a second embodiment of the inventive coupling arrangement; and Figure 4 is a sectional view taken on the line IV-IV in Figure 3. Mutually similar or generally similar components of the arrangement have been identified in the various Figures with the same reference signs. Figures 1 and 2 illustrate a coupling arrangement which is intended for connecting a pair of mutually opposite radiators 10, 11 to two upwardly extending pipes 12, 13 for hot water and cold water which has been cooled in the radiators. The arrangement is comprised of an upper and a lower connector head 14, 15, a riser pipe 16 and a coupling piece 31. The upper connector head 14 includes an inner chamber 18 having a hot water inlet 19 to which the upper end of the riser pipe is connected, for in¬ stance by welding or hard soldering (brazing) , and two hot water outlets 20, by means of which the chamber 18 is connected to the two radiators. The outlets 20 are comprised of a weldable material and have the form of stubs, i.e. short tubular connectors, which are welded, e.g. press-welded, to the upper part of a respective one of the radiators 10, 11 around inlet openings 21 provid- ed therein. Reference 22 identifies a thermostat valve having a closure body 23 which is intended to coact with an annular seat 24 for adjustment of the water flow through the valve 22, said seat 24 being located in the flow path between the inlet 19 and the outlets 20. The bottom connector head 15 includes an inner chamber 25 into which the bottom end-part 26 of the riser pipe 16 extends. The riser pipe 16 is firmly connected to the connector head 15, e.g. by welding or brazing. The chamber 25 has a downwardly directed outlet 27 and two inlet stubs 28 which surround openings 29 in the bottom part of the radiators 10, 11. Similar to the outlets 20, these inlets 28 are comprised of weldable material and are connected to respective radiators, e.g. by pressure welding. Cooled water is thus conducted through the inlet 28 to the chamber 25, from where it departs through the outlet 27. The coupling piece, generally referenced 31, is con¬ nected to the outlet 27, by means of a fastener nut ' 30. The coupling piece 31 has two connector stubs 32, 33, and is intended to be detachably connected to respective hot and cold water pipes 12, 13, and an oppositely directed coupling stub 34 which is located in the same plane as and centrally between the connector stubs 32, 33. The coupling stub 34 is connected to the outlet 27 with the aid of the fastener nut 30 and sealing means 35. Similar fastener nuts and sealing means can be used for detachably coupling the stubs 32 and 33 with the upper ends of the pipes 12, 13. The connector stub 33 communicates with the outlet 27 of the bottom connector head 15 via a first channel arrangement 36-38 in the interior of the coupling piece 31, while the second connector stub 32 communicates with the bottom end of the riser pipe 16, via a second channel arrangement 39-4"- in the interior of the coupling piece 31. The second channel arrangement 39-41 includes a tubular piece 41 which is connected firmly to the coup¬ ling piece 31 and which has a free end 42 of circular cross-section which extends coaxially with and out from said coupling stub. The end 42 of the tubular piece and the bottom end 26 of the riser pipe 16 extend sealingly one into the other. The outer diameter of the tubular piece 41 is smaller than the inner diameter of the outlet 27 and the coupling stub 34, so as to obtain externally of the tubular piece 41 a ring-channel 36 which forms part of the channel arrangement 36-38. In the illustrated embodiment, ' the end 26 of the riser pipe projects into a flared, outermost end-part 42 and a sealing ring 43 is mounted between the mutually inserted ends 43, 26 of the tubular piece and the riser pipe. Reference numerals 44 and 45 identify closure valve * s mounted in the channel arrangements 36-38 and 39-41. Subsequent to unscrewing the nut 30 and releasing the coupling piece 31 from the outlet 27, and, for instance, unscrewing similar securing nuts from the externally screw-threaded connector stubs 32, 33, the coupling piece 31 can be readily rotated through one-half of a revolution relative to the bottom connector head 15, with the ends 42, 26 of the tubular piece and the riser pipe inserted one in the other, so as to ensure that a desired flow direction through the radiators 10, 11 will be obtained, even though the pipes 12, 13 may be switched. Because the coupling piece 31 can be rotated, or twisted, the coupling arrangement can be used for both right and left radiator fittings, thereby enabling the minimum number of components to be stored for all relevant coupling requirements. in the case of the coupling arrangement illustrated in Figures 1 and 2, the axes of the stubs 20 and 28 are located in the same plane as the axis of the riser pipe 16 and are intended for a twin radiator. In the case of single radiators, one of the stubs 20 or 28 is omitted, s indicated in broken lines at 46 and 47 in Figure 1. Figures 3 and 4 illustrate a particularly favourable construction of the bottom connector head 15, where the axes of the stubs 20 and 28 must be placed in a common plane located at a distance from the axis of the riser pipe 16, in order to enable the coupling arrangement to be positioned optimally for a twin radiator. In this case, the bottom connector head 15 is comprised of two mutually perpendicular and mutually crossing sleeves or tubular pieces 48, 49, which partially intersect one another. The tubular pieces 48, .49 are fixedly joined by, e.g., pressure welding, around the intersection region and communicate with one another in this region through an opening 50. The ends of the tubular piece * 49 projecting on both sides from the vertical tubular piece 48 form stub connectors 28, each of which is intended for connection to its respective radiator (not shown) . The upper end of the tubular piece 48 is closed by means of an annular cover member 51, which is welded onto the tubular member 48, whereas' the bottom end of the tubular member has an external screw thread so as to form the outlet 27 intended for connection to the coupling piece (not shown) . The invention is not restricted to the aforedescribed and illustrated embodiments thereof, but can be realized in any desired manner within the scope of the inventive concept defined in the following .Claims.

Claims: Claims 1. An arrangement for connecting a radiator (10, 11) for water-carried heat to a pair of upwardly extending supply and exhaust pipes (12, 13) for conveying respect¬ ively hot and cold water which has been cooled in the radiator, said arrangement comprising an upper connector head (14) having an inner chamber (18) which included a h water inlet (19) and which is connected to the upper part the radiator (10, 11) via at least one hot water outlet (20), a bottom connector head (15) having an inner chamber (25) which is provided with a cold water outlet (27) and which is connected to the bottom part of the radiator (10, 11) via at least one cold water inlet (28), a hot water riser pipe (16) having an upper outlet end connected to the chamber inlet (19) of the upper connector head and a bottom inlet end (26) which pro¬ jects into the chamber (25) of the bottom connector head and which extends coaxially with the chamber outlet (27), and a coupling piece (31) having two connector stubs (32, 33) intended for connection with the pair of supply and exhaust pipes (12, 13), and an oppositely- directed coupling stub (34) which extends in the same plane as and centrally between the connector stubs for connection with the outlet (27) of the bottom connector head and which communicates with one (13) of the connec¬ tor stubs via a first channel arrangement (36-38) in the interior of the coupling piece (31) , while the other (12) of the connector stubs is intended for connection to the bottom inlet end (26) of the riser pipe (16) via a second channel arrangement (39-41) in the interior of the coupling piece, c h a r a c t e r i z e d in that the second channel arrangement (39-41) includes a tubu- lar piece (41) which is connected firmly to the coupling piece (31) and which has a free end (42) of circular cross-section which extends coaxially with the coupling stub, wherein said end (42) of the tubular piece and the bottom end (26) of the riser pipe with the coupling piece (31) connected to the bottom connector head (15) extend sealingly one within the other, wherein the outer diameter of the tubular piece (41) in the region of. the coupling stub (34) is smaller than the inner diameter of the coupling stub. 2. An arrangement according to Claim 1, c h a r a c ¬ t e r i z e d in that the outer one of the mutually inserted ends (42, 26) of the tubular piece and the riser pipe has a flared, funnel-shaped outermost end- part. 3. An arrangement according to Claim 1 or 2, c h a r ¬ a c t e r i z e d in that a sealing ring (43) is mount¬ ed between the mutually inserted ends (42, 26) of the tubular piece and the riser pipe. 4. An arrangement according to any one of Claims 1-3, c h a r a c t e r i z e d in that closure valves (44, 45) are mounted in said first and said second channel arr ngements(36-38, 39-41). 5. An arrangement according to any one of Claims 1-4, c h a r a c t e r i z e d in that the inlet (19) and outlet (20) of the " upper connector head (14) -communicate with one another via a control valve (22-24), preferably a thermostat valve. 6. An arrangement according to any one of Claims 1-5, c h a r a c t e r i z e d in that the bottom connector head (15) is comprised of two mutually crossing pieces (48, 49) which partially intersect one another and which in the region of intersection are provided with an opening (59) establishing communication between said pieces, wherein the bottom end (26) of the riser pipe (16) projects coaxially into one tubular piece (48) and throug a wall member or cover member (51) provided on one end of said piece.

Inventors: SOERBERG BENGT ERIK, SOERBERG, BENGT, ERIK
Applicants: BEAS INDKONSULT AB, B.E.A.S. INDUSTRIKONSULT AB
Application year: 1992
Main classification: F24H9
IPC codes: F24H9, F28F9