DE29900221U1 - Venting device with a venting valve, in particular for radiators - Google Patents

Description

PATENT AND LAW FIRM Patent Attorney Dipl.-Ing. H. Schmitt

Cr ¹ UAzTTTT &lgr;/&Tgr;&Dgr; T &Tgr;&Ggr;&Iacgr;-&Tgr;&Tgr;&eegr;D &Lgr; RÖRTR? Patent Attorney Dipl.-Ing. W. Maucher

^CHMl 1 1, MAU^HtIK & ÜUKJÜä _Patent . _and Attorney H. Börjes-Pestalozza

Anton Hummel Dreikönigstrasse 13

Verwaltungs GmbH D-79102 Freiburg i. Br.

Mozartstrasse 2

79183 Waldkirch Telephone (07 61) 70 67 73

/y±öJ waiüKircn Fax (07 61) 70 67 76

Mr/&eegr;&bgr;

Venting device with a vent valve,
especially for radiators

The invention relates to a venting device with a vent valve, in particular for radiators, heating systems or pipes, with a housing, in particular with a screw connection for its fastening, and a valve spindle adjustable therein as a vent screw or drain screw, which passes through a through opening into a chamber, which chamber in turn has an outlet opening and is connected to the housing via a tight seat.

Such venting devices are known in different designs. For example, from DE 33 04 505 a venting valve is known in which the chamber into which the air initially enters during venting can be rotated so that its outlet opening can be brought into a favorable position, even if the radiator and the venting valve are already installed.

In addition, devices for emptying and filling radiators with heating fluid are known, for example from DE 195 06 672 C2. While the vent valves on a radiator, container or pipe are arranged as high as possible, such devices for emptying and refilling are arranged as high as possible.

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mounted deep. The known device for emptying and filling mentioned also has a screw body with an opening facing the interior of the radiator, which in turn can be closed and opened by a valve spindle serving as a drain screw, whereby the liquid during emptying passes into a chamber and to an outlet opening of this chamber.

Since radiators in particular, but also other closed systems containing liquids, should be able to be vented and individually emptied and/or filled separately and after

^ since they have to be vented again after emptying and then filling, the venting devices mentioned on the one hand and devices for emptying on the other hand are increasingly necessary in parallel.

It is therefore already known from DE-GM 92 16 796 to provide a ventilation plug for both venting and draining. However, there is no chamber with which the escaping medium could be directed in a desired direction or connected to a hose or the like. Furthermore, the outlet cross-section is aligned with the venting process, so that a correspondingly large amount of time is to be expected for draining.

5 DE 21 43 7 67 discloses a venting device with a venting valve in which a water inlet valve and the venting valve are assembled or combined at the same time. For venting purposes, this is a very complex arrangement and, above all, this combined valve arrangement is not suitable for draining the liquid from a radiator because this device has to be positioned very high on the radiator due to the venting function. This arrangement is therefore only suitable for filling a radiator. Accordingly, there are also no chambers into which the medium initially enters during emptying in order to be able to drain from there.

The invention is therefore based on the object of creating a venting device of the type mentioned at the outset, with which rationalization can be achieved, in particular in the manufacture of such venting devices and emptying devices.

To solve this problem, the device mentioned at the beginning is characterized in that the housing, the valve spindle and the chamber are parts of a kit in which the housing can be used either for venting or for emptying or filling with liquid and is designed to match these different uses, that this kit includes valve spindles with matching threads that fit into the housing and can be used optionally depending on the application, and that at least one chamber of the kit for venting on the one hand and at least one other or differently dimensioned chamber of the kit for emptying or filling with liquid on the other hand have a matching seat or a matching coupling for connection to the housing.

In this way, a consistent screw body can be used both for venting and for emptying, for example, a

^ radiator, so that a corresponding rationalization effect is achieved in the manufacture of the vent valves on the one hand and the drain plugs or valves on the other. Depending on the application, the user can obtain either the valve spindle suitable for venting or the valve spindle used for draining in the corresponding housing, whereby the chamber can then also be adapted to the respective case.

The user, for example the heating engineer, can possibly purchase a correspondingly large number of housings and then the venting and draining spindles and the respective closing chambers and keep them in stock as a kit and combine them as appropriate from application to application.

It is advantageous if the respective chamber is detachably attached to the housing(s) and, depending on the application, the chambers and/or the valve spindles are interchangeable. This means that even if the kit parts are assembled incorrectly, this can be corrected later. For example, if a vent spindle with the corresponding chamber has been accidentally attached to the housing, but the device is to be mounted as a drain valve, the valve spindle and chamber can be easily replaced.
10

~ It is particularly useful if the valve spindle can be detachably coupled to an extension included in the kit to increase its axial dimension, and if this extension bridges the increased dimension of the chamber used for emptying or filling up to an operating opening on this chamber. The valve spindle can therefore be designed either as a one-piece for venting or as a two-piece for emptying, whereby its first part with the corresponding sealing seat can already be used as a vent screw with a chamber of the appropriate size that can be attached to the housing, while the two-piece design, i.e. the addition of the extension to the valve spindle, leads to the

^ correspondingly larger axial dimension, which is useful for an emptying and filling arrangement, so that with a larger 5 chamber a larger drain or hose connection can be provided in order to obtain corresponding flow cross-sections for the liquid during emptying or filling. This can increase the rationalization effect even further, because the valve spindle can then still be manufactured and provided for both applications 0 and thus in large quantities. For example, the coupling for the extension piece can correspond to the attack for an operating tool of the valve spindle or vent screw. The extension can therefore simply be attached axially, for example, to a hexagon or hexagon socket with 5 a corresponding counterpart and removed from the other

Such an extension is cheaper to produce than a larger valve spindle.

With such a design, the user can therefore use the screw body and the valve spindle in the same design and size for all applications that he requires in the case of venting, and only needs to provide an extension for the valve spindle from case to case and select the appropriate chamber with outlet opening or drain nozzle for each application.

The chamber for venting can be shorter than the chamber for emptying and the outlet opening for venting can have a smaller cross-section than that for emptying or filling. This means that venting can be carried out sensitively in the usual and known way, but emptying or filling with liquid can be carried out relatively quickly using larger cross-sections.

The outlet opening of the larger chamber can - as already mentioned - have or form a hose connection, which simplifies both emptying and filling.

The chambers of the kit, which can be optionally attached to the housings in a sealing manner, can be fixed in the axial direction, in particular by means of a snap connection, and can be rotated relative to the housing, as is known per se, for example, from DE 21 11 453 or DE 33 04 505. The kit according to the invention can therefore make use of the advantages of these previously known vent valves, because the chambers can be detachably connected to the housing and replaced. The same process can also be used for a device assembled for emptying.

The housing and/or the chambers and/or the valve spindle(s) can be made of plastic. This results in a particularly cost-effective arrangement.

While in the vent valve according to DE 33 04 505 C2 the rotatable chamber overlaps a nozzle containing the valve spindle on the outside, in a further development of the present invention the seat of the chamber can be provided inside the housing or a locking or snapping projection of the chamber can fit into a sleeve-like area of the housing and snap in releasably. This means that the snap connection is inserted into the interior

^ usually harder and more resistant housing and well protected without the need for additional external shielding or the like at this connection point.

In addition, this enables - also for "normal" vent valves or drain valves - a further embodiment of the invention with its own significance worthy of protection, which can consist in the chamber being able to be pressed against its seat in the housing by means of a conical effect by the valve spindle located inside it and adjustable in the axial direction when opening, and thus additionally sealed and/or secured against unintentional axial loosening, and that the chamber can be

^ The valve spindle is held in a detachable or disengageable position relative to the housing in the closed position. Since the chamber with its seat is arranged in an area of the housing on the inside, it is in this area in direct proximity to the axially adjustable valve spindle, so that a corresponding mutual clamping and compression can be arranged and provided there when the valve spindle is opened. Especially when the valve spindle 0 is open, an unintentional release of the detachable connection between the housing and the chamber would be particularly unfavorable, because the medium escaping from the valve would then shoot out uncontrollably. At the same time, however, it is desirable that the chamber can be replaced, which is easily possible when the valve is closed with the valve spindle screwed in.

The locking projection of the chamber can have at least one ring-shaped bead or the like and the sleeve-like receiving area of the housing can have a matching undercut and the chamber can be connected to the housing or elastic deformation in a form-fitting but detachable manner. If the bead and the undercut have correspondingly slanted and rounded surfaces that match each other, the parts can be pressed into each other like a push button and can also be released again, which is not possible if the overlapped bead has a recess on its side that runs approximately at right angles to the central axis, for example in accordance with DE 33 04 505 C2.

~ has a locking surface. If this is inclined, it is possible to unlock again. However, if the valve spindle is open, this is blocked and prevented by the measure already described.

A particularly simple structural solution is obtained if on the outside of the valve spindle a section is provided which increases or widens away from the housing opening, in particular conically or continuously, the cross section of which therefore increases in the screwing-in direction of the valve spindle and which, when the valve spindle is in the closed position 0, is adjacent to the inside of the seat of the chamber and in particular to the bead area or snap-in area and, when the valve spindle is opened, into the chamber and into the

fe area of the positive seat and with its inclined surfaces comes into active connection with the chamber and its seat in the sense of an expansion or blocking of a compression.

When the valve spindle is open, the cone on the outside of the valve spindle ensures that the seat area of the chamber cannot give way radially inwards if the chamber is pulled in an axial direction to loosen it. Thus, when the valve spindle is 0 open, the chamber cannot be loosened or prevented.

An alternative or additional measure could be that the entry area for the valve spindle into the chamber and 5 its seat on the housing is conical or funnel-shaped

and a collar or similar peripheral part or a cone tapering in the opening direction on the valve spindle enters this opening under radial force application and/or expansion of the chamber when the valve spindle opens. The cone effect could therefore also be relocated to the inlet into the chamber or both the inlet into the chamber and a part protruding on the outside of the valve spindle could together exert a correspondingly increased cone effect.

In all these cases, the opening path of the valve spindle is simultaneously limited and the chamber is protected against unintentional release

™ This mutual locking or interlocking provided on the valve spindle and/or the chamber therefore has a dual function, which is a great advantage with regard to the detachable fastening of the chamber, or rather allows the chamber to be detachably fastened so that this can be subsequently corrected in the event of incorrect assembly or incorrect composition from the kit.

0 In particular, when combining one or more of the features and measures described above, a modular system or kit is created in which as many parts as possible are the same and are suitable for venting as well as emptying or filling with liquid. In particular, the housing and the valve spindle can form a basic unit that can optionally be combined with different chambers and possibly an additional part for the valve spindle. The parts can be made of plastic and/or metal.

0 An embodiment of the invention is described in more detail below with reference to the drawing. It shows, in a partially schematic representation:

Fig. 1 shows a longitudinal section through a vent valve according to the invention and

Fig. 2 is a longitudinal section through a device in which

a screw connection and a valve spindle of the vent

valve according to Figure 1 in the same shape and dimensions

are provided to work together, but with another larger chamber and an extension on the valve spindle

part are provided so that the device in this arrangement can be used as a drain or fill valve for liquid.

Figures 1 and 2 together show a venting device with a venting valve 1 shown in Figure 1, which

* can be used preferably for radiators, heating pipes or heating systems.

This vent valve 1 has a housing 2 with a screw socket 3 for its fastening in a corresponding opening of the radiator or the like and a valve spindle 5 which is axially adjustable in this housing 2 in the axial direction by means of a thread 4 as a vent screw or, in the application according to Figure 2, as a drain screw, which has a through opening 6 into a chamber 7 and/or passes through such a through opening 8 or closes it in the closed position.

It would be conceivable that by opening the valve spindle 5, the opening 5 8 and a passage leading to the interior of the chamber 7 are released. In the embodiment, however, a centering and guide section 9 is provided as an extension of the thread 4 and therefore a through opening 6 is led through the valve spindle 5 to the chamber 7. If necessary, several such through openings 6 could also be arranged on the circumference of the valve spindle 5.

The aforementioned chamber 7 in turn has an outlet opening 10 and is connected to the housing 2 via a tight seat, designated as a whole by 11.
35

When looking at Figures 1 and 2 at the same time, it becomes clear that the housing 2, the valve spindle 5 and the chamber 7 are parts of a kit in which the housing 2 can be used either for venting as shown in Figure 1 or for emptying or filling with liquid as shown in Figure 2 and is designed to be consistent for these different uses. It is therefore also provided with the same reference numbers in the figures themselves and with regard to its further details, which also applies in the same way to the valve spindle 5, which is still to be described in this sense.

" This kit also includes the valve spindle 5, in the example with its through hole 6, and with matching thread 4 as well as the guide and centering 9. 15

In Figure 2, it can be seen that different chambers 7 and 17 are provided depending on the application. One chamber 7 of the kit is provided for venting and another or differently sized chamber 17 is provided for emptying or filling with liquid. However, these chambers 7 and 17 each have a matching seat 11 or a matching coupling for connection to the housing 2.

The respective chamber 7 or 17 is detachably attached to the housings 5 2 and can be replaced depending on the application.

In particular, incorrect assembly can be easily corrected.

As mentioned, the same valve spindle 5 is provided for both applications in the embodiment 0. To convert it into a drain screw, it can be detachably coupled to an extension 12 belonging to the kit in accordance with Figure 2 to increase its axial dimension, whereby this extension 12 bridges the increased dimension of the chamber 17 to 5 used for emptying or filling to an operating opening 13 on this chamber 17, where

the extension 12 is or can be attached to a pivot bearing 14 and an axial stop 15 in a rotatable but tight manner.

For coupling, the extension 12 engages with a hexagon 16 in a hexagon socket 18 of the valve spindle 5, which in the application according to Figure 1 serves as a vent valve for the engagement of an operating tool provided with a hexagon. Thus, this deformation or shape used for operating the valve spindle 5 can simultaneously be used in a rational manner for coupling with the extension 12, which in turn can contain an analogous hexagon socket 19 for the same operating tool.

When comparing Figures 1 and 2, it becomes clear that the chamber 7 for venting is smaller than the chamber 17 for emptying and that the outlet opening 10 for venting has a smaller cross-section than that for emptying or filling. This means that on the one hand, venting can be carried out delicately, but on the other hand, liquid can be drained or refilled relatively quickly and with a larger cross-section. The outlet opening 10 of the larger chamber 17 has a hose connection 20 in order to be able to connect a corresponding filling hose with a sufficiently large cross-section.

Due to these dimensional relationships of the chambers 7 and 17, the extension 12 of the valve spindle 5 is necessary so that this valve spindle 5 can still be used unchanged for both applications. However, it would also be conceivable to provide valve spindles of different lengths for both cases, in which only the thread 4 and guide or centering 9 match, but the axial length is different. However, this would still require the manufacture of different spindles. Although there would still be a considerable rationalization effect in the manufacture of the venting and filling devices, this can be somewhat greater if the valve spindle 5 matches, with only a relatively simple extension piece 12 being required.

12
is additionally required.

The chambers 7 and 17 of the kit, which can be optionally attached to the housings 2 according to Figures 1 and 2 in a sealing manner, can be fixed in the axial direction by a snap connection in the area of the seat 11 in the exemplary embodiment and can be rotated relative to the housing 2.

This allows the outlet openings 10 and a possibly provided nozzle 21 or the hose connection 20 to be brought into a favorable position, even if the housing 2 is already firmly mounted.

^ The device or kit is particularly inexpensive if the housing 2 and/or the chambers 7 and/or 17 and/or the valve spindle, and possibly also the extension 12, are made of plastic. However, it is also possible to manufacture individual parts from metal in order to achieve the same rationalization effect. However, the chambers 7 and 17 are expediently made of plastic in all these cases.

0 The seat 11 of the chamber 7 and 17 is provided in the embodiment inside the housing 2 or a locking or snapping projection 22 of the chamber 7 and 17 fits into a

^ sleeve-like area 23 of the housing 2 and can snap into place there in a releasable manner. This locking projection 22 of the chamber 5 7 or 17 is therefore located in the position of use within the housing 2 or within its sleeve-like area 23, so that the seat 11 is well protected by the generally more robust housing 2.

0 The locking projection 22 of the chamber 7 or 17 has at least one ring-shaped, radially projecting bead 24, while the sleeve-like receiving area 23 of the housing 2 has a matching, ring-groove-like undercut 25. The chamber 7 or 17 can thus be positively but detachably connected and locked to the housing 2 with little elastic deformation and due to the shape of the bead

24 and undercut 25 can also be unlocked again. This means that if a user has mistakenly assembled the kit as a vent valve instead of as an emptying device or vice versa, he can easily correct this error.
5

However, so that the chamber 7 or 17 cannot be accidentally disengaged or released during use and in particular when opening the valve spindle 5, it can be pressed against its seat in the area of its seat 11 in the housing 2 by the valve spindle 5 located inside it and adjustable in the axial direction when opening by means of a conical effect and can therefore also be additionally sealed and, above all,

™ can also be secured against axial loosening. In the closed position of the valve position 5, however, the chamber 7 or 17 can be released or disengaged from the housing 2 in the manner already mentioned.

In detail, this securing of the chamber 7 or 17 in its position of use is achieved by opening the valve spindle 5 by providing a section 26 on the outside of the valve spindle 5 which increases or widens away from the chamber 7 or 17 and in the direction of the thread 4 in a continuous or conical manner, which can practically be connected as an outer cone in one piece with the valve spindle 5. This section or cone 26 is in the closed position

^ according to Figure 1 or 2, the valve spindle 5 is located on the inside of the seat 11 of the chamber 7 or 17 and in particular adjacent to the area of the bead 24, but not in contact with it. If the valve spindle 5 is moved axially in the opening direction from this position shown in Figures 1 and 2, this expanding section 2 6 or cone enters the chamber 7 or 17 and in particular into the area of the positive seat 11 and also the bead 0 2 4 and comes into active connection with the inclined surfaces of the chamber 7 or 17 in the sense of an expansion of this frontal contact area. This limits the opening movement of the valve spindle 5 on the one hand, since the entrance to the chamber 7 is on the path of this radially projecting section 26, but at the same time the chamber 7 is also subjected to a radial

Force, by means of which a somewhat elastic chamber 7 or 17 is accordingly expanded or stressed in the sense of expansion. As a result, the bead 24 is pressed more firmly into the undercut 25, so that the chamber 7 or 17 is now prevented from disengaging. By a relatively simple arrangement of a conical section 2 6 on the valve spindle 5, the chamber 7 or 17, which is intentionally intended to be detachable, can be held non-detachably during the critical situation of the opening of the valve spindle 5.

The venting device with vent valve 1 has a

" relatively stable housing 2 made of metal or hard plastic with a screw connection 3 with an external thread or internal thread, with which the device can be attached to a radiator to be vented, a pipe or the like or also to a radiator or the like to be filled with liquid or emptied. In the housing 2 there is an adjustable valve spindle 5 in order to apparently close a passage from the cavity to be vented or emptied.

0 A preferably rotating chamber 7 has the final

Outlet opening 10 for the respective medium. The housing 2, the valve spindle 5 and the chamber 7 are parts of a kit, ^ in which the housing 2 and preferably also the valve spindle 5 can be used both for a vent valve and for a device for emptying or filling with liquid in a constant shape and dimension, whereby this kit includes different chambers that can be optionally attached to the housing 2 for venting or emptying. This results in a considerable rationalization effect for these vent and emptying valves, which can often be attached to one and the same container or radiator or the like.

- Expectations -

Claims (12)

Expectations 1. Venting device with a vent valve (1), in particular for radiators or heating systems, with a housing (2) having in particular a screw connection (3) for its fastening and a valve spindle (5) adjustable therein as a vent screw or drain screw, which has a through opening (6) into a chamber (7), which chamber (7) in turn has an outlet opening and is connected to the housing (2) via a tight seat (11), characterized in that the housing (2), the valve spindle (5) and the chamber (7) are parts of a kit in which ™ the housing (2) can be used either for venting or for emptying or filling with liquid and is designed to match these different uses, that this kit includes valve spindles (5) each with a matching thread (4) that fit into the housing and can be used as needed depending on the application, and that at least one chamber (7) of the kit for venting on the one hand and at least one other or differently dimensioned chamber (17) of the kit for emptying or filling with liquid on the other hand have a matching seat (11) or a matching coupling for connection to the housing. 5 2. Device according to claim 1, characterized in that the respective chamber (7, 17) is detachably attached to the housing or housings (2) and, depending on the application, the chambers and/or the valve spindles are interchangeable. 3. Device according to claim 1 or 2, characterized in that the valve spindle (5) for conversion into a drain screw can be detachably coupled to an extension (12) belonging to the kit for increasing its axial dimension and this extension (12) covers the enlarged dimension of the chamber (17) used for emptying or filling up to a 16
Operating opening (13) is bridged at this chamber (17). 4. Device according to one of claims 1 to 3, characterized in that the chamber (7) for the venting case is shorter than the chamber (17) for the emptying case and that the outlet opening (10) for the venting case has a smaller cross-section than that for the emptying or filling process. 5. Device according to one of claims 1 to 4, characterized in that the outlet opening (10) of the larger chamber (17) has or forms a hose connection (20). 6. Device according to one of claims 1 to 5, characterized in that the chambers (7, 17) of the kit, which can be optionally attached to the housings (2) in a sealing manner, can be fixed in the axial direction, in particular by a snap connection, and can be rotated relative to the housing (2). 0 7. Device according to one of claims 1 to 6, characterized in that the housing (2) and/or the chambers (7, 17) and/or the valve spindle(s) consist of plastic. 8. Device according to one of claims 1 to 7, characterized in that the seat (11) of the chamber (7, 17) inside of the housing (2) is provided or a locking or snapping projection (22) of the chamber (7, 17) fits into a sleeve-like region (23) of the housing (2) and snaps releasably into place.
30 9. Device according to the preamble of claim 1 and/or in particular according to one of claims 1 to 8, characterized in that the chamber (I ₁ 17) in the region of its seat (11) in the housing (2) is closed by the spring 5 located in its interior and adjustable in the axial direction when opening. I:" The valve spindle (5) can be pressed onto its seat by means of a conical effect and can thus be additionally sealed and/or secured against axial loosening, and that the chamber (7, 17) is held so that it can be released or disengaged from the housing (2) when the valve spindle (5) is in the closed position. 10. Device according to one of claims 1 to 9, characterized in that the locking projection (22) of the chamber (7, 17) has at least one annular bead (24) or the like and the sleeve-like receiving area (23) of the housing (2) has a matching undercut (25) and the chamber (7, 17) is positively but detachably connected to the housing (2) under elastic deformation. 11. Device according to one of claims 1 to 10, characterized in that on the outside of the valve spindle (5) a section (26) is provided which, in particular conically or continuously, enlarges or widens away from the chamber (7, 17), which, when the valve spindle (5) is in the closed position, is adjacent to the inside of the seat (11) of the chamber (7, 17) and in particular to the area of the bead (24) and, when the valve spindle (5) is opened, enters the ^ chamber (7, 17) and the area of the positive seat (11) and comes into operative connection with its inclined surfaces 5 with the chamber (7, 17) in the sense of an expansion. 12. Device according to one of claims 1 to 11, characterized in that the inlet area for the valve spindle into the chamber and its seat on the housing is conical or funnel-shaped and a collar or similar peripheral part or a cone tapering in the opening direction on the valve spindle enters this opening under radial force application and/or expansion of the chamber when the valve spindle opens.
5 Patent Attorney