EP0965803A2 - Connector for a radiator, more especially a plate radiator, of a hot water heating installation - Google Patents

Abstract

A connection device for a heater, esp. a plate heater in a warm water heating installation, comprises a lower connection, a riser tube, and an upper valve housing region on the heater inlet. The riser tube (11), the lower connection (13) and the valve housing (17) are produced from a single tube made of deformable metal. The lower connection area pref. has an adaptor with a teflon sealing ring on its inner thread.

Description

The invention relates to a connection device for a Radiators, in particular panel radiators, of a hot water heating system, with a lower connection section for the Flow of a pipe network, a riser pipe and an upper one Valve housing area at an inflow into the radiator.

Such connection devices are known, the connection between a pipe network connection at the bottom Flow or warm strand and a valve area on one Form the upper hot water inlet into the radiator. The connection device includes a lower connection area with a screw thread for the pipe network connection, a riser pipe and an upper valve housing with a threaded opening for receiving and screwing in the valve or valve insert, using different valve insert variants can be. To get out of these multiple items To form an assemblable unit are the corresponding parts Manufacturing steps required the elaborate Processes such as welding, soldering, gluing, pressing or Screw in and, if necessary, require a combination. This Manufacturing is expensive and involves the risk of leakage at the connection points of the individual parts of the assembled Connecting device. Usually a riser pipe about 12 mm in diameter with 1 mm wall thickness (⊘12 x 1 mm) used by soldering, welding or the like with the other components got to. This small dimensioning of the riser pipe is necessary order for a covert one that is desired for optical reasons Installation of the connection device inside the radiator no contact with between the convection plates to get this convection sheet. The too narrow Shafts shaped convection plates are in a closely adjacent one Arrangement to increase the heating areas in the Radiator arranged so that the riser for Available space is very tight.

The invention is therefore based on the object of providing a connecting device of the type mentioned at the outset which is simple to produce, requires little space and is adapted to the installation situation and can be used universally.

This task is performed with a connection device specified at the beginning solved according to the invention in that the riser with the lower connection section and / or the valve housing in one piece from an output tube made of deformable Metal is made by non-cutting forming. So can essentially the entire connection device, in which only a valve insert must be installed by Forming without cutting and thus inexpensive to manufacture. The risk of leaky joints and possible leaks is due to the one-piece design eliminated.

Advantageous embodiments of the invention are specified in the dependent claims.
In an expedient embodiment of the invention, the outlet pipe or the riser pipe is formed and in particular widened at its lower end to form the connection section to the connection diameter and at its upper end to form the valve housing adapted to a valve insert.

If the riser pipe with the lower connection section and the valve housing from an outlet tube with an oval cross-section is made, made possible or facilitated this oval cross section of the riser pipe is its non-contact Placement inside the radiator under the cramped Space between the convection plates.

However, an outlet pipe with a round cross section can also be used over a substantially between the convection sheets arranged pipe section length in an elongated, in particular be shaped oval cross-section of the riser. The standpipe can also be designed or reshaped be fitted into the radiator.

With regard to different connection positions and connection variants it is appropriate that in the lower connection area an internal thread and / or an external thread is formed is. Then you can use different pipe fittings or pipe sockets with internal or external thread Connection to the flow of the pipe network.

If the pipe wall in the lower connection area a thickening has, it is ensured that regardless of the In any case, the wall thickness of the outlet pipe or riser pipe one for thread production in the connection area there is sufficient wall thickness.

There are different manufacturing variants for the Thickening possible. For example, it can be Redirection of the pipe wall to the outside, by retracting the Pipe wall inwards or by compressing the wall area getting produced.

The internal thread and / or the external thread in the connection area can be both non-cutting as well as cutting getting produced. For example, the thread also with a cutting thread of a pipe sleeve made of harder Material cut into the softer pipe wall or without cutting be rolled in.

If in an appropriate design in the lower connection area screwed an adapter for a compression fitting is when installing a radiator also provided for such connections.

Such an adapter, made in particular of brass with a rubber sealing ring (O-ring) sealed on the internal thread.

If the adapter has a Teflon sealing ring on the internal thread is sealed, the adapter can due to the temperature resistance of the Teflon ring during manufacture of the radiator.

However, the adapter can also be made of plastic be, the required temperature resistance at the Material selection is taken into account. Sealing a such an adapter can have a press thread or a Stop against a steel ring. The adapter can also be designed as a sealing plug, in which will later have a through opening. This then has the advantage that the connection device is closed is from the production of the connection device up to and including the entire manufacture of the Hot plates.

If necessary, the seating area for the clamping ring can be equipped with a additional plastic part may be covered, under certain circumstances also the threaded part outside because of the paint. This must then be removed before opening the packaging in to enable the two plastic screw-in parts.

Because the material of the output pipe because of the required Deformability may have poor wear resistance for a valve seat, it is advantageous if a valve seat ring during assembly of a Valve insert is inserted into the valve housing. This can be used for a variety of different needs A suitable valve seat ring for each valve insert with the appropriate flow rate.

On the other hand, a valve seat ring can be accommodated in the valve housing be the one already in the forming of the valve housing this is positively positioned and fixed.

A contour opening is expediently formed in the valve housing in the region of the valve seat and a sleeve of a valve insert is inserted. With such a sleeve, the K _v value of the valve can be adjusted. For a valve, the K _v value quantifies the relationship between the position of the actuator (stroke with a movable closing element such as a valve disk) and the flow rate and thus indicates the flow behavior of a valve.

Thus, the connection device according to the invention offers universal Possible applications and also the use of various Valve inserts.

Fig. 1:

in einer Schnittansicht ein Ausführungsbeispiel einer Anschlußvorrichtung gemäß der Erfindung;

Fig. 2:

in einer Oberansicht in schematischer Darstellung ein Plattenheizkörper mit der Position eines Steigrohres der Anschlußvorrichtung;

Fig. 3:

in einer Oberansicht entsprechend Fig. 2 der Plattenheizkörper mit einem Steigrohr mit ovalem Querschnitt;

Fig. 4:

in einer Querschnittansicht eine Ausführungsform eines unteren Anschlußendes der Anschlußvorrichtung;

Fig. 5:

in einer Querschnittansicht eine weitere Ausführungsform des unteren Anschlußendes der Anschlußvorrichtung;

Fig. 6:

in einer Querschnittansicht in vergrößerter Darstellung das untere Anschlußende mit einem eingeschraubten Adapter;

Fig. 7:

in einer Querschnittansicht in vergrößerter Darstellung eine weitere Ausführungsform des Adapters für das untere Anschlußende;

Fig. 8:

in einer Querschnittansicht das Oberende der Anschlußvorrichtung mit dem Ventilgehäuse und einem Ventilsitzring;

Fig. 9:

in einer Querschnittansicht das Oberende der Anschlußvorrichtung mit dem Ventilgehäuse und einem Ventileinsatz; und

Fig. 10:

in einer Querschnittansicht in vergrößerter Darstellung das untere Anschlußende mit einem eingeschraubten Adapter.

The invention is explained in more detail below on the basis of exemplary embodiments with reference to drawings. It shows:

Fig. 1:

in a sectional view an embodiment of a connection device according to the invention;

Fig. 2:

a top view in a schematic representation of a plate heater with the position of a riser pipe of the connecting device;

Fig. 3:

in a top view corresponding to Figure 2 of the plate radiator with a riser tube with an oval cross-section.

Fig. 4:

in a cross-sectional view an embodiment of a lower connection end of the connection device;

Fig. 5:

in a cross-sectional view a further embodiment of the lower connection end of the connection device;

Fig. 6:

in a cross-sectional view in an enlarged view the lower connection end with a screwed adapter;

Fig. 7:

in a cross-sectional view in an enlarged view a further embodiment of the adapter for the lower connection end;

Fig. 8:

in a cross-sectional view the upper end of the connection device with the valve housing and a valve seat ring;

Fig. 9:

in a cross-sectional view the upper end of the connection device with the valve housing and a valve insert; and

Fig. 10:

in a cross-sectional view in an enlarged view the lower connection end with a screwed adapter.

A connection device 10 according to the invention (see FIG. 1) contains a riser pipe 11, which in its installed position in one plate-shaped heating element 30 (see FIGS. 2 and 3, in FIG. 1 not shown) approximately vertically between convection plates 31 runs. At the lower end 12 of the riser pipe 11 is a connection portion 13 is formed opposite one the cross-section of the riser pipe is enlarged having. At the connection section 13 is an external thread 14 and an internal thread 15 molded so that a screwable Connector, such as. B. a threaded connector or a pipe socket with internal or external thread, a connection with a pipe connection on the bottom (not shown) a flow V or warm strand of a hot water heating system can be manufactured. At the height of one upper hot water access in the radiator 30 is that Riser pipe 11 bent into a horizontal pipe section 16, shaped towards the pipe end as a valve housing 17 is formed at the open end of an internal thread 18 is. A valve insert 19 is received in the valve housing 17 and screwed tightly thereon via the internal thread 18. The valve insert 19 contains a closing part 20 (e.g. a valve disc, plug or cylinder) that is on or in a valve seat 21 of the valve housing 17 opposite this is axially movable.

When using an oval tube (e.g. 20 mm x 10 mm) or a tube of similar geometry, which is in the range of Valve seat 21 (e.g. ⊘ 16 mm) an approximate Has circumference, the tube is both in the lower connection section 13 (water inlet or inlet) as well as on the valve housing 17 (valve seat area 21, middle area 22, threaded section 18) reshaped or expanded such that it has the required dimensions. This is possible, if the material used as pipe material, in particular Steel, an elongation of about 30 - 35% during forming allows. On the valve housing 17 as well as in the lower connection section 13 the respective thread 18 or 14, 15 becomes non-cutting manufactured.

If, alternatively, a round tube with a required, comparable cross-sectional area used is, this is in both the lower and the upper area to the required dimensions of the connection section 13 and the valve housing 17 deformed or expanded. However, because of the required cross-sectional area resulting pipe diameter for installation between the convection plates 31 is too large, at least the one to be arranged between the convection plates 31 Section of the riser 11 to the geometry and arrangement the convection plates 31 are adapted. This can e.g. B. by reshaping or stamping the round tube into a oval or similarly shaped cross-sectional shape (Fig. 3) made become.

A prefabricated ball T-piece is attached to the valve housing 17 or ball L-piece 23 as a connector for the hot water inlet attached in the radiator 30, which for example even before expansion by inert gas welding, Resistance welding, laser welding or with other types of connection that provide a tight and tight connection surrender.

The internal thread 15 on the lower connection section 13 (Lead V) can be without cutting or also by machining manufactured so that a threaded connector or a Pipe socket with an external thread can be screwed in. In usually these are G ½ threads.

The manufacture of the internal and external threads 15 and 14, respectively can also be done in one operation with a numerically controlled Tapping or milling machine can be made.

External threads are also used to meet demand on the market 14 with G ¾ thread, then on the inner part additionally an inner contour for the admission of a Clamping ring is provided for a clamping ring connection (not shown). Because of a trained on the inner part Cone and the seal with the clamping ring is used as the material preferably used brass, so the screw connection is easier to solve again.

It is expedient in one embodiment of the connecting device 10 in the lower part of the connection section 13 a thickening 24 of the wall of the riser pipe 11 is produced, which in addition to the internal thread 15 the attachment of the external thread 14 in the same connection section 13 even with a thin-walled tube. The pipe 11 with the thickening 24 is made of steel. The thickened section 24 can by turning the pipe wall to the outside (see Fig. 4), by pulling inwards (see Fig. 5) or produced by compressing the wall area.

If so in the manufacture of the radiator 30 formed connection device 10 with internal and external thread 15 or 14 is also installed, so the installer can when using compression fittings as required additionally an adapter 25 (see Fig. 6) in screw in the internal thread 15. The adapter 25 has one Cone 26 for sealing one to be attached to it Clamping ring, as well as a sealing ring (O-ring) 27, which seals the adapter 25 on the internal thread 15. To screw in can use a standard hex key be used. The adapter 25 is off, for example Made of brass.

If an adapter is already in the radiator production in the connection device 10 is to be screwed in, a Adapter 28 (see Fig. 7) can be used, the Teflon sealing ring 29 has the high temperatures of withstand up to approx. 150 ° C during radiator production can.

Alternatively, a comparable adapter 25 made of plastic be made of a temperature resistance up to at least 130 ° C and the required dimensional stability having. This adapter is sealed via a press thread or a correspondingly shaped one Steel stop or heel in the pipe.

Finally, the connection device 10 for a water return R from the radiator in its lower area a return T or return L piece 32 with a return connection 33 on, the internal and external threads 34, 35 (as in the flow) for connection to the pipe network. This combination of internal thread and external thread too can be manufactured by machining. In addition, a sleeve 36 (shown in dashed lines) the return T or return L piece 32 may be attached. It forms an alternative connection option and is part of Closed when not in use with a cover or sealing plug. The distance of, for example, 50 mm between the flow connection 13 and the return connection 33 can with With the help of a connecting web 37 or a section of a Tube.

8 is a valve housing 17 with a valve seat ring 38 shown in the manufacture and shaping the valve housing 17 mounted in this and on a Formation is determined. This provides a valve seat compared to one with the appropriate choice of material the pipe material much better wear resistance having. The valve seat ring 38 has one diameter-enlarged paragraph 41 on a corresponding molded shoulder 42 on the valve housing 17 at Insert comes to the plant. For positive fixation of the valve seat ring 38 in this position is after the Insert a diameter constriction 43 in the valve housing 17 molded.

As an alternative to this, the valve seat ring is introduced into the valve housing 17 in the customary manner when a valve insert 19 is installed and its K _v value is set and is placed against a stop.

In Fig. 9, a sleeve 39 is shown in the valve housing 17 is arranged in the region of the valve seat. In this area has a contour opening 40 in the housing 17 formed for the water outlet in the radiator. A such sleeve 39 for the valve insert (lance valve) allowed a shorter overall length of the valve.

Due to the valve design shown, one can usually today used compact valve, which consists of valve plate, Seat, housing and Kv adjustment facility (Kv window and counter opening sleeve) is to be replaced, being considerable Costs can be saved.

10 shows a further embodiment of an adapter 45 shown, which is basically like the adapter 25 from Fig. 6 is constructed. With this adapter 45 made of plastic a through opening is closed with a sealing section 46, through which the connecting device during the production and also the leak test can be closed tightly is. If necessary, the sealing section 46 can also can be removed with little effort.

Claims (16)

Connection device for a radiator, in particular plate radiator, a hot water heating system, with a lower connection section for the flow of a pipe network, a riser pipe and an upper valve housing area at an inflow into the radiator,
characterized by
that the riser pipe (11) with the lower connection section (13) and / or the valve housing (17) is made in one piece from an output pipe made of deformable metal by non-cutting shaping. Connection device according to claim 1,
characterized by
that the outlet pipe or the riser pipe (11) is deformed at its lower end (12) to form the connection section (13) to the connection diameter and at its upper end to form the valve housing (17) adapted to a valve insert (19) and in particular widened. Connection device according to claim 1 or 2,
characterized by
that the riser pipe (11) with the lower connection section (13) and the valve housing (17) is made from an outlet pipe with an oval cross section. Connection device according to one of claims 1 to 3,
characterized by
that an exit pipe with a round cross-section is formed into an elongated, in particular oval cross-section of the riser pipe (11) over a pipe section length arranged essentially between the convection plates (31). Connection device according to one of claims 1 to 4,
characterized by
that an internal thread (15) and / or an external thread (14) is formed in the lower connection area (13). Connection device according to claim 5,
characterized by
that the tube wall in the lower connection area (13) has a thickening (24). Connection device according to claim 6,
characterized by
that the thickening (24) is produced by folding the tube wall outwards, by drawing the tube wall inwards or by compressing the wall area. Connection device according to one of claims 5 to 7,
characterized by
that the internal thread (15) and / or the external thread (14) is formed without cutting or cutting. Connection device according to one of claims 5 to 8,
characterized by
that an adapter (25; 28) for a compression fitting is screwed into the lower connection area (13). Connection device according to claim 9,
characterized by
that the adapter (25) is sealed with a rubber sealing ring (26) on the internal thread (15). Connection device according to claim 9,
characterized by
that the adapter (28) is sealed with a Teflon sealing ring (29) on the internal thread (15). Connection device according to claim 9,
characterized by
that the adapter is made of plastic. Connection device according to one of claims 1 to 12,
characterized by
that a valve seat ring can be inserted into the valve housing (17) during assembly of a valve insert (19). Connection device according to one of claims 1 to 12,
characterized by
that a valve seat ring (38) is received in the valve housing (17), which is positioned and fixed in the valve housing (17) when it is formed. Connection device according to one of claims 1 to 10,
characterized by
that a contour opening (40) is formed in the valve housing (17) in the region of the valve seat, and that a sleeve (39) of a valve insert is inserted. Connection device according to one of claims 9 to 15,
characterized by
that the adapter (45) is designed as a sealing plug with a removable sealing section (46).

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