UA71549C2 - Thermostatic calorifer valve nozzle - Google Patents

Abstract

A thermostatic nozzle (1) is proposed for the calorifer valve with housing (3,4) where there is installed a thermostatic element (11) with pressure chamber (12) with volume varying depending on temperature, with executive element (15) that is in functional way connected to the thermostatic element (11), and with safety unit with a spring (18) of excess pressure. In the nozzle (1) there can be used the thermostatic element (11) with decrease of the dimensions of the nozzle. The spring (18) for excess pressure is installed between the thermostatic element (11) and the housing element (3) and it makes pressure on the thermostatic element (11) in the direction of the executive element (15), at that the thermostatic element (11) is installed in the holding shell (10) that acts as a counter-support for the spring (18) of excess pressure.

Description

a stop plate for a valve stem or for an auxiliary spring. An important function of this thickening is the shielding of the thermostatic element from the heat rays of the valve. In this case, the thermostatic element, as desired, will be affected only by the temperature of the room. Thickening can be done in the form of a disk with a reflective, for example, aluminum surface, which will provide the best thermal shielding.

It is desirable that the executive element is massive. Then it will not be deformed either by the action of the thermostatic element or by excess spring pressure, and, accordingly, all changes in the volume of the thermostatic element will be directly transmitted to the valve. The executive element can be made, for example, from a synthetic material by casting.

The following is a detailed description of preferred embodiments of the invention with reference to the drawings, in which:

Fig. 1 - a section of the thermostatic nozzle of the heater valve and

Fig. 2 - the corresponding section in the state of compression.

Fig. 1 shows a section of the heater valve with a thermostatic nozzle, and the nozzle adjusts to maintain a set temperature of 22"С in the room. Fig. 2 shows the same nozzle with a valve, but for a temperature of 32"С, i.e. in a situation where excess pressure has occurred .

The nozzle 1 has a body 2, which consists of a body element C in the form of, for example, a rotary handle and a base 4, connected by a threaded connection 5. By rotating the handle C, its axial position relative to the base 4 can be changed.

The base 4 includes a connecting support 6 with an internal clutch assembly 7, through which it is fixed to the valve of the heater. For fastening, a union nut 8 is used, which covers the support 6 and is installed on the support in the proper position by turning on the thread 9.

The rotating handle C acts on the holding collar 10, which in turn holds the thermostatic element 11.

The thermostatic element 11 contains a pressure-forming chamber 12, in which there is a tube 13 open on one side of the bellows, the wall of which is capable of deformation. In addition, the thermostatic element 11 has a capsule design, the wall 14 of which is practically incapable of deformation.

A spindle 15 is installed in the bellows tube 13, which in the working position performs the function of an executive element. At the end remote from the thermostatic element, the spindle 15 has a thickening 16, which is a support plate for the auxiliary spring 17, which rests on the base 4 and presses the spindle in the direction of the thermostatic element 11. The auxiliary spring 17 is relatively weak, that is, it is able to create relatively small reactive force. The thickening 16 also serves as a thermal shield, which is a barrier to the heat radiated from the clutch assembly 7. For greater efficiency, the screen can have a reflective, for example, aluminum surface.

The holding collar 10 is covered by a compression spring 18, which is installed between the flange 19 of the holding collar and the flange 20 of the rotary handle 3 and presses on the thermostatic element in the direction of the base 4. The movement of the thermostatic element 11 in the direction of the base 4 is limited by a limiting node, which includes the first limiter 25, located on the clip 10, and the second limiter 26 on the rotary handle 3. This also limits the travel of the spring 18.

Between the retaining clip 10 and the rotary handle C, there is a rotational coupling (not shown).

In the "normal" state illustrated in Fig.1, the compression spring 18 has an increased length. The holding clip 10, the rotary knob C and the thermostatic element form a single node, the position of which in the base can be changed by rotating the knob 3. This also changes the tasks for the thermostatic element 11.

The pressure-forming chamber 12 is filled with liquid, the volume of which changes depending on the temperature. As the temperature decreases, the volume decreases. The spindle 15 can move inside the thermostatic element under the action of the auxiliary spring 17. In some cases, this movement can be provided by the valve return spring (not shown). The further the spindle 15 moves into the pressure-forming chamber, the more the valve opens.

If the temperature rises, the volume of liquid in the pressure-forming chamber 12 increases and the spindle 15 moves down (according to Fig.1). At the same time, the bellows tube 13 is slightly deformed, and the movement of the spindle 15 increases the throttling of the heater valve.

When the valve is already in the closed position (Fig. 2), a further increase in temperature, caused, for example, by sunlight in the room or the presence of a large number of people (in both cases, this increases the amount of heat), will cause an increase in the volume of liquid in the pressure-forming chamber 12 and the corresponding increase in pressure, which can lead to damage to the thermostatic element and/or valve.

An increase in the volume of liquid in the pressure-forming chamber 12 causes further extrusion of the spindle 15 from the thermostatic element 11. Since the spindle 15 can no longer advance further, the compression spring 18 is compressed and the thermostatic element 11 together with its retaining clip 10 is pushed out in the axial direction from the rotary handle 3 As a result, the distance a between the body of the bellows tube and the opposite face of the thermostatic element (Fig. 2) will increase compared to the same distance at

Fig1.

On the area 21 of the holding arm 10, you can apply a colored marking in a circle, in the form of, for example, a red ring. This will provide a visual signal about the occurrence of compression, that is, that the heater valve is already closed and turning the rotary knob will not cause any changes. Thanks to this design, the appearance of compression in the pressure-forming chamber causes the movement of the thermostatic element 11 away from the valve, eliminating the risk of damage, and makes additional space in the nozzle unnecessary for the extension of the thermostatic element in the axial direction. This makes it possible to use the existing thermostabilizing elements 11, while reducing the required size.

Additional elements, as you can see, can be made relatively simply. This applies, in particular, to the rotary handle 3, the holding collar 10 and the tube. The holding clip 10 forms an additional cover 22 on the front side of the thermostatic element 11, which provides it with direct protection. Circular holes 23, 24 provide air access to the thermostatic element 11.

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