DE1250222B - - Google Patents

Description

GERMAN PATENT OFFICE EDITORIAL

German class: 47 g-43/01

Number: 1250 222

File number: D 50865 XII / 47 g

J 250222 Filing date: August 17, 1966

Opened on September 14, 1967

The invention relates to a valve with an attachment for a thermostatic that can also be removed during operation Actuating system, the attachment housing of which is attached at one end to the valve housing and the one held by the top housing, also serving as a heat sensor with an external bellows box Sheath, a setpoint spring, an abutment for the setpoint spring that extends through openings in the attachment housing, a rotary handle axially adjusting the abutment and a fixed axial stop includes for the twist grip.

A valve of this type is known in which the attachment housing has the bellows socket on its valve housing facing end carries. On the one hand, the set point spring and, on the other hand, are supported on the bellows box the end face of the twist grip loaded by the same set point spring via the abutment. The rotary handle is attached to the outside of the attachment housing with a union member.

Valves with such an attachment have the advantage that the attachment as a unit is independent of the valve is. You can therefore mount the valve on a building and you need the more sensitive one Attachment only when moving into the building.

In the known valves of this type, the bellows socket was either only a working element; she got then controlled via a capillary tube by a remote sensor. Or the bellows box was Feeler and working element; it then had a sensing surface exposed to the passing ambient air.

There are also known thermostatically operated valves which are controlled as a function of the temperature of the medium flowing through the valve. For example, there are valves that are attached to the outlet of a radiator and are influenced as a function of the return temperature. In these valves, the thermostatic sensing and working elements were either built into the valve housing in such a way that they were in direct contact with the medium flowing through the valve, or they were at least directly connected to the valve housing in a thermally conductive manner. In this case, however, the advantages of a valve with an attachment that could be attached subsequently were lost. Ü The invention has for its object to provide a valve with an attachment, which is a tight cohesive, stable structure that can also be assembled without tools and disassembled. Furthermore, such a removable attachment should also be suitable for those cases in which the valve, as a function of the temperature, is valve with attachment

for a thermostatic actuation system

Applicant:

Danfoss A / S, Nordborg (Denmark)
Representative:

Dr.-Ing. U. Knoblauch, patent attorney,
Frankfurt / M., Kühhornshofweg 10

Named as inventor:

Volker Spies, Augustenborg (Denmark)

the flow medium is influenced. In particular, it should be possible to selectively select any valve units with an attachment that allows regulation depending on the room temperature, or

so to use with an attachment that allows regulation depending on the temperature of the flow medium, or with an attachment that is influenced by both the room temperature and the temperature of the flow medium.

To solve this problem, the valve according to the invention is characterized in that the attachment housing is a tube surrounding the jacket of the bellows box and is axially immovable on the tube a sleeve with a flange is attached, which is the counter bearing for the force of the set point spring applied rotary handle forms.

In this construction, the flange of the sleeve placed on the top housing tube forms a contact surface, against which the twist grip is pressed by the setpoint spring. As a result, the axial position is the twist grip secured without the use of a union member, provided that the bellows box is a spatially has a fixed position. There are various options for this using the existing components.

In a preferred embodiment, the tube is also slotted in the area of the jacket and is clamped from the sleeve onto the jacket. This is generally sufficient to hold the bellows box in place the end.

Instead or in addition, the sleeve can be provided with a bottom that has a stop for the bellows box forms.

A particularly good fastening results when an inner edge of the sleeve is in a corresponding groove engages on the outside of the pipe in the jacket area.

709 647/302

Claims (4)

The assembly of such an attachment is done quite simply by putting the abutment, the set point spring, the bellows box and the sleeve in place and then screwing on the rotary handle. A simple reverse rotation lock attached at a later date on the rotary handle ensures that the attachment remains in the assembled state. Furthermore, the tube clamped onto the jacket in a thermally conductive manner can be made of metal. This creates a valve with an attachment which is influenced as a function of the temperature of the flow medium. In contrast to an attachment housing made of plastic, in which the bellows box is essentially influenced by the room temperature, a metal tube ensures good heat transfer from the flow medium to the bellows box in two ways. First, the metal pipe has good thermal conductivity. Second, there is good heat transfer between the metal tube and the bellows element because the tube can tightly enclose the jacket. A good heat transfer between the valve housing and the attachment housing is inevitable under these conditions, since the attachment must be firmly attached to the valve housing in some way. . With the help of such an attachment, it is now possible to use any valve units, be it straight or corner valves, either with an attachment that allows regulation depending on the room temperature, or with an attachment that allows regulation depending on the temperature of the flow medium , to use. In addition, there is also the possibility of influencing the working element both from room temperature and from the temperature of the flow medium, for example by exposing the end face of the bellows box element to the room air flow and, if necessary, only surrounding the jacket over part of its surface with the metal tube of the attachment housing. The invention is explained in more detail below using an exemplary embodiment shown in the drawing. It shows F i g. 1 shows a longitudinal section through the valve according to the invention with an attachment and FIG. 2 is a side view of the attachment housing from the right in FIG. The valve housing has an extension 4 into which a cover 5 is screwed. This serves to guide a valve stem 6 and to accommodate a stuffing box 7. An attachment housing 8 (FIG. 2) consists essentially of a metal tube 9 which is provided with a clamping flange 10 at the bottom. The tube 9 has two opposite longitudinal slots 11 through which the arms of an abutment 12 reach outwards. Both slots 11 continue upward in slots 13, which give the tube a resilience property in the area of the jacket 14 of a bellows box 15. One slot 11 continues in a slot 16 in the area of the clamping flange 10 in order to be able to clamp the attachment housing resiliently onto the extension 4 of the valve housing 1 with the aid of a screw connection 17. A groove 18 is provided on the outer circumference of the tube 9. The inner edge 19 of a sleeve 20 provided with a bottom at the end engages in this groove, which presses the tube 9 against the jacket 14 of the bellows element and at the same time supports this bellows element on its end face. Furthermore, this sleeve carries a flange 21 on the outside, which axially retains a rotary handle 22 on its inner projections 23. The rotary handle also has an internal thread 24 into which an annular external thread 25 of the abutment 12 engages. Furthermore, a setpoint spring 26 and an actuating shaft 27 are provided. A scale plate 28 closes the rotary handle from the outside. In the remaining cavity there are two rings 29 and 30 which have external teeth which interact with corresponding internal teeth of the rotary handle 22 »5. Furthermore, a stop 31 is provided on the outside of the sleeve 20, which can interact with one stop each on the inside of the rings 29 and 30. With the help of these rings, any limitation of the rotary movement of the rotary handle 22 is possible. The assembly of the attachment is very easy. The abutment 12 is pushed into the slots 11. After inserting the shaft 27 and the setpoint spring 26, the bellows element is pushed into the tube 9 as from above. Then put the sleeve 20 over the tube until the inner edge 19 engages in the groove 18, and then screw the twist grip 22 over the whole thing until the. Stop 23 rests on the flange 21, the result is a tightly cohesive solid structure that can be assembled and disassembled without tools. Then only the rings 29 and 30 and the scale plate 28 need to be put on. The attachment is now fully assembled. He can be clamped at any time on the extension 4 of the valve housing 1 who the. Patent claims: 1. Valve with removable during operation Attachment for a thermoplastic actuation system, the attachment housing of which at one end on Valve housing is attached and the one held by the attachment housing, also as a heat sensor Serving bellows box with external jacket, a setpoint spring, an abutment for the setpoint spring reaching through openings in the attachment housing, a rotary handle axially adjusting the abutment and a fixed axial one Includes stop for the rotary handle, characterized in that the attachment housing (8) is a tube (9) enclosing the jacket (14) of the bellows box (15) and axially on the tube immovable a sleeve (20) with a flange (21) is attached, which is the counter bearing for the acted upon by the force of the setpoint spring (26) Rotary handle (22) forms. 2. Valve according to claim 1, characterized in that the tube (9) is also in the region of the Sheath (14) slotted and clamped by the sleeve (20) on the sheath. 3. Valve according to claim 1 or 2, characterized in that the sleeve (20) with a bottom is provided, which has a stop for the bellows box (15) forms. 4. Valve according to one of claims 1 to 3, characterized in that an inner edge (19) the sleeve (20) in a corresponding channel (18)