EP0965803B1 - 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 Radiator, in particular panel radiator, eienr hot water heating system, with a lower connection section for the Flow of a pipe network, a riser and an upper Valve body area at an inflow into the radiator.

Such connection devices are known which provide a connection between a bottom-side pipe network connection of a Flow or hot strands and a valve area on one form upper hot water in the radiator. The connection device includes a lower terminal area with a screw thread for the pipe network connection, a riser and an upper valve housing with a threaded opening for receiving and screwing in the valve or the valve insert, where different valve insert variants used you can. To get out of these several items to form a mountable unit are the parts corresponding Manufacturing steps required, the elaborate Methods such as welding, soldering, gluing, press-fitting or Screw in and possibly require their combination. These Manufacturing is expensive and involves the risk of leaks at the joints of the parts of the assembled Connecting device.

A generic prior art provides the connection device for radiators according to document DE-A-19 522 022. This discloses an integrated valve assembly for panel radiators consisting of a housing with Valve insert, a riser projecting into the housing and an inlet and a drain connection part. The Riser pipe is connected to the valve housing or to the inlet and drain connection part, in which it protrudes, welded.

In DE-U-87 08 437 is a bottom of the flow and return port arranged connection fitting for panel radiators with associated, acting on the return port Valve body disclosed. The riser is also in here an upper connecting part or in the fitting body as lower connection part. The fitting body with connections and connecting piece is designed as a casting.

In GB-A-657 692 there are improvements to central heating elements, especially a dense, good-looking, fast and exactly mountable connecting part for connecting the Radiator with the circulation system of the heating fluid, disclosed. This connecting part consists of a pipe connecting pin portion with internal thread, a tapered Transitional proportion with inner bore and a bushing portion with heel strip at the inner radius, which is also pierced. A riser is not provided.

Usually, a riser pipe of about 12 mm in diameter used at 1 mm wall thickness (12 x 1 mm), by soldering, Welding or the like be assembled with the other components got to. This small dimensioning of the riser is necessary at a hidden desired for optical reasons Installation of the connection device inside the radiator between the convection plates no contact with to get these convection plates. The narrow ones Shafts shaped convection sheets are in a closely spaced Arrangement for increasing the heating surfaces in the Radiator arranged so that the for the riser to Available space is very tight.

The invention is therefore an object of the invention to provide a connection device of the type mentioned, which is easy to manufacture, a small and adapted to the installation space required space and is universally applicable.

This object is achieved with a connection device specified at the outset solved according to the invention that the riser with the lower connection portion and / or the valve housing in one piece from a starting tube of deformable Metal is produced by chipless forming. Thus, can essentially the entire connecting device, in the only still a valve insert must be installed by Forming without cutting and thus be produced inexpensively. The risk of leaking joints and of possible leaks is due to the one-piece design eliminated.

That's it Starting pipe or riser at its lower end to Forming the connection section to the connection diameter and at its upper end to form the valve insert adapted valve housing reshaped and in particular widened.

Advantageous embodiments of the invention are in the dependent Claims specified.

When the riser with the lower connection section and the valve housing from an output tube with oval cross-section is made so enabled or relieved this oval cross section of the riser its non-contact Arrangement inside the radiator under the cramped Space between the Konvektionsblechen.

However, also a starting pipe with a round cross-section over a substantially between the Konvektionsblechen arranged pipe section length in an elongated, in particular oval cross-section of the riser to be transformed. Also by this design or transformation, the riser be fitted in the radiator.

With regard to different connection positions and connection variants It is expedient that in the lower terminal area an internal thread and / or an external thread formed is. Then you can with different pipe fittings or pipe socket with internal or external thread Connection to the flow of the pipe network can be made.

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

There are different production variants for the Thickening possible. So she can, for example, by a Relocation of the pipe wall to the outside, by a collection of Pipe wall to the inside or by a compression of the wall area getting produced.

The internal thread and / or the external thread in the connection area Can be both chipless and by cutting shaping getting produced. For example, the thread can also with a cutting thread of a pipe sleeve of harder Material cut into the softer pipe wall or without cutting be rolled.

If in a convenient design in the lower terminal area screwed on an adapter for a compression fitting is so when installing a radiator also provided for such compounds.

Such an adapter, especially made of brass is, is expediently with a rubber sealing ring (O-ring) sealed at the internal thread.

If the adapter with a teflon sealing ring on the internal thread is sealed, the adapter may be due to temperature resistance the Teflon ring already in the production be installed of the radiator.

However, the adapter can also be made of plastic be, with the required temperature resistance in the Material selection is taken into account. The sealing of a Such adapter can via a compression thread or a Stop against a steel ring done. The adapter can be simultaneously formed as a sealing plug, in the later a through hole is introduced. 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 production of the Heating plates.

If necessary, the seating area for the clamping ring with a be covered further plastic part, under certain circumstances also the threaded part outside because of the paint. This one must then be removed before packing to the opening in To enable the two plastic screwed.

Since the material of the output tube because of the required Deformability may have low 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. As a result, if necessary, for a variety of different Valve inserts a matching valve seat ring be installed with appropriate flow.

On the other hand, a valve seat ring can be accommodated in the valve housing be that already in the molding of the valve body in this form-fitting positioned and fixed.

Conveniently, a contour opening is formed in the valve housing in the region of the valve seat and inserted a sleeve of a valve core. With such a sleeve, the K _v value of the valve can be adjusted. The K _v value for a valve is the relationship between the position of the actuator (stroke for a movable closing element such as a valve disc) and the flow rate and thus indicates the flow behavior of a valve.

Thus, the terminal device according to the invention provides universal Uses 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 will be explained in more detail by means of embodiments with reference to drawings. It shows:

Fig. 1:

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

Fig. 2:

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

3:

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

4:

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

Fig. 5:

in a cross-sectional view, another embodiment of the lower terminal end of the terminal device;

Fig. 6:

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

Fig. 7:

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

Fig. 8:

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

Fig. 9:

in a cross-sectional view, the upper end of the connecting device with the valve housing and a valve core; and

Fig. 10:

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

A connection device 10 according to the invention (see FIG. 1) contains a riser 11, which in its installed position in a plate-shaped heating element 30 (see FIGS. 2 and 3, in FIG. 1 not shown) approximately perpendicularly between Konvektionsblechen 31 runs. At the lower end 12 of the riser 11, a terminal portion 13 is formed facing one the riser cross-section extended cross-section having. At the connection portion 13 is an external thread 14 and an internal thread 15 formed so that a screw-on Connector, such. B. a threaded connector or a pipe socket with internal or external thread, a connection with a bottom-side pipe network connection (not shown) of a flow V or hot strand of a hot water heater can be produced. At the height of one upper hot water inlet into the radiator 30 is the Riser 11 bent into a horizontal pipe section 16, the formed towards the pipe end as a valve housing 17 is at the open end of an internal thread 18 is formed is. In the valve housing 17, a valve core 19 is received and on the internal thread 18 screwed tightly thereto. The valve insert 19 contains a closing part 20 (eg a valve plate, cone or cylinder), the or in a valve seat 21 of the valve housing 17 opposite this is axially movable.

When using an oval tube (eg 20 mm x 10 mm) or a tube of similar geometry, which is in the range of Valve seat 21 (eg 0 16 mm) approximated thereto Has circumference, the tube is both in the lower connection section 13 (water inlet or inlet) as well as on the valve body 17 (valve seat portion 21, middle portion 22, threaded portion 18) reshaped or expanded so that it has the required dimensions. This is possible, if the material used as a pipe material, in particular Steel, when forming an elongation of about 30 - 35% allows. On the valve housing 17 as well as in the lower connection section 13, the respective thread 18 and 14, 15 without cutting produced.

If as riser 11 alternatively a round tube with a required, comparable cross-sectional area used will, this will be both in the lower and in the upper area on the particular 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 Konvektionsblechen 31 is too large, must also at least to be arranged between the Konvektionsblechen 31 Section of the riser 11 to the geometry and the arrangement the convection plates 31 are adapted. This can z. B. by forming or embossing of the round tube in a oval or similarly shaped cross-sectional shape (Fig. 3) made become.

On the valve housing 17 is a prefabricated ball tee or ball L-piece 23 as a connector for the hot water inlet mounted in the radiator 30, which, for example already before expansion by inert gas welding, Resistance welding, laser welding or with other types of connection, a solid and tight connection result.

The internal thread 15 at the lower terminal portion 13th (Flow V) can be without cutting or by machining made so that a threaded connector or a Pipe sleeve with external thread can be screwed. In usually these are G ½ threads.

The preparation of the internal and external thread 15 and 14th can also be done in one operation with a numerically controlled Tapping or milling machine can be made.

For existing market demand also external thread 14 with G ¾ thread produced, in which case on the inner part In addition, an inner contour for receiving 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 a material Preferably used brass, so that the screw connection again easier to solve.

Appropriately, in one embodiment, the connection device 10 in the lower part of the connection section 13 a thickening 24 of the wall of the riser 11 is made, in addition to the internal thread 15 attachment of the external thread 14 in the same connection section 13 also possible 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 by upsetting the wall area are made.

If in the manufacture of the radiator 30 such a way formed connection device 10 with internal and external thread 15 or 14 is installed, so the installer when using compression fittings as required in addition an adapter 25 (see Fig. 6) in screw in the internal thread 15. The adapter 25 has a Cone 26 for the sealing of a to be created Clamping ring on, as well as a sealing ring (O-ring) 27, which seals the adapter 25 on the internal thread 15. For screwing can be a standard hexagon wrench be used. The adapter 25 is for example off Made of brass.

If an adapter already in the radiator production in the connecting device 10 should be screwed, must be Adapters 28 (see Fig. 7) are used, which is a Teflon sealing ring 29, the high temperatures of to withstand 150 ° C during the heater production can.

Alternatively, a comparable adapter 25 made of plastic be made of a temperature resistance to at least 130 ° C and also the required dimensional stability having. The sealing of this adapter takes place via a compression thread or a correspondingly shaped Stop or heel made of steel 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 having a return port 33 on, the inner and outer threads 34, 35 (as in the flow) for connection to the pipe network. Also this combination of internal thread and external thread Can be made by machining. In addition, a sleeve 36 (shown in phantom) on be attached to the return T or return L-piece 32. It forms an alternative connection option and is included Disused by a lid or sealing plug. The distance of, for example, 50 mm between the flow connection 13 and the return port 33 can with Help a Verbindungssteges 37 or a section of a Pipe are set.

In Fig. 8 is a valve housing 17 with a valve seat ring 38 shown in the manufacture and the shaping the valve housing 17 mounted in this and at a Forming is determined. This provides a valve seat, the opposite with appropriate choice of material the pipe material significantly better wear resistance having. In this case, the valve seat ring 38 a diameter-extended paragraph 41, which at a corresponding shaped shoulder 42 on the valve housing 17 at Insertion comes to the plant. For positive fixation the valve seat ring 38 in this position is after the Insert a diameter restriction 43 in the valve body 17 formed.

Alternatively, in the usual way, the valve seat ring is introduced during assembly of a valve insert 19 and its K _v value in the valve housing 17 and applied 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 is in the housing 17, a contour opening 40th formed for the water outlet in the radiator. A such sleeve 39 for the valve insert (lance valve) allowed a shorter length of the valve.

By the illustrated valve design, a today usually used compact valve consisting of valve plate, Seat, housing and Kv adjustment (Kv window and counter-opening sleeve) are replaced, with considerable Costs can be saved.

In Fig. 10 is another embodiment of an adapter 45, which basically like the adapter 25 of FIG Fig. 6 is constructed. In this adapter 45 made of plastic a passage opening is closed with a sealing section 46, through which the connecting device during The production and also the tightness test tightly closed is. If necessary, the sealing portion 46 with be removed with little effort.

Claims (16)

1. Connector for a radiator (30), in particular a plate radiator, of a hot-water heating installation comprising a lower connector section (13) for the supply of a pipe system, a riser (11) and an upper valve housing (17) located at an inflow into the radiator (30),
   characterized in that
   the riser (11) is produced in one piece with the lower connector section (13) and/or the valve housing (17) from an initial pipe of deformable metal by means of non-cutting shaping and
   in that a cross-sectional portion of the initial pipe is widened in order to form the lower connector section (13) and/or the valve housing (17).
2. Connector according to claim 1,
   characterized in that
   the initial pipe or riser (11) is deformed and widened at its lower end (12) according to the connecting diameter in order to form the connector section (13) and at its upper end to form the valve housing (17) adapted to a valve core (19).
3. Connector according to claim 1 or 2,
   characterized in that
   the riser (11) comprising the lower connector section (13) and the valve housing (17) is produced of an initial pipe having an oval-shaped cross-section.
4. Connector according to any one of claims 1 to 3,
   characterized in that
   an initial pipe having a round cross-section is deformed into an elongated, in particular oval-shaped cross-section of the riser (11) along the length of a pipe section arranged substantially between the convection plates (31).
5. Connector according to any one of claims 1 to 4,
   characterized in that
   in the lower connector section (13) an internal thread (15) and/or an external thread (14) is formed integrally.
6. Connector according to claim 5,
   characterized in that
   in the lower connector section (13) the pipe wall has a thickening (24).
7. Connector according to claim 6,
   characterized in that
   the thickening (24) is produced through an outward-beading of the pipe wall, through an inward-drawing of the pipe wall or through an upsetting of the wall portion.
8. Connector according to any one of claims 5 to 7,
   characterized in that
   the internal thread (15) and/or the external thread (14) is formed in a non-cutting or cutting manner.
9. Connector according to any one of claims 5 to 8,
   characterized in that
   an adapter (25; 28) is screw-connected in the lower connector section (13) for a clamping ring screw coupling.
10. Connector according to claim 9,
    characterized in that
    the adapter (25) is sealed on the internal thread (15) by means of a rubber sealing ring (26).
11. Connector according to claim 9,
    characterized in that
    the adapter (28) is sealed on the internal thread (15) by means of a Teflon sealing ring (29).
12. Connector according to claim 9,
    characterized in that
    the adapter is produced of plastic material.
13. Connector according to any one of claims 1 to 12,
    characterized in that
    a valve seat-ring can be inserted in the valve housing (17) during an assembly of a valve core (19).
14. Connector according to any one of claims 1 to 12,
    characterized in that
    a valve seat-ring (38) is accommodated in the valve housing (17), which is positioned and fixed in the valve housing (17) during the shaping of the latter.
15. Connector according to any one of claims 1 to 10,
    characterized in that
    a contour aperture (40) is formed in the valve housing (17) in the portion of the valve seat and in that a sleeve (39) of a valve core is inserted.
16. Connector according to any one of claims 9 to 15,
    characterized in that
    the adapter (45) is designed as a sealing plug with a removable sealing section (46).

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