CN103363184B

CN103363184B - Thermostatic controlled valve, especially radiator valve

Info

Publication number: CN103363184B
Application number: CN201210189564.5A
Authority: CN
Inventors: P.赫尔克; N.毕尔加德
Original assignee: Danfoss AS
Current assignee: Danfoss AS
Priority date: 2012-03-29
Filing date: 2012-06-08
Publication date: 2020-01-03
Anticipated expiration: 2032-06-08
Also published as: CN103363184A

Abstract

The invention provides a thermostatically controlled valve, in particular a radiator valve, comprising: -a valve housing (2) having an inlet (3), an outlet (4) and a valve seat (5) positioned between the inlet (3) and the outlet (4), -a valve element (7) movable relative to the valve seat (5), -a bellows element (16) acting on the valve element (7), and-a control device (20) for adjusting a set-point for the valve (1). The thermostatically controlled valve should have a simple construction. For this purpose, the control device (20) engages the valve housing (2), the control device (20) connecting the bellows element (16) and the valve housing (2).

Description

Thermostatic controlled valve, especially radiator valve

Technical Field

The invention relates to a thermostatic controlled valve, in particular to a radiator valve, comprising: a housing having an inlet, an outlet and a valve seat positioned between the inlet and the outlet, a valve element movable relative to the valve seat, a thermostatic element acting on the valve element, and a control device for adjusting a set point for the valve.

Background

Such a thermostatically controlled valve is known from WO 92/20945. The control device is fixed to a socket connected to the housing. When the control device rotates, the thermostatic shaft is moved to change the set point of the valve.

Disclosure of Invention

An inherent object of the invention is to adopt a simple construction for a thermostatically controlled valve.

This object is achieved in that the control device engages the valve housing, which control device connects the thermostatic element and the valve housing.

In other words, the present invention no longer has a socket, and therefore, does not require a clamping band, a clasp, a coupling nut, or the like for mounting the thermostat on the valve. The thermostatic element is now mounted directly on the valve housing and therefore the fixing of the thermostatic element and the control element can be considered to be combined in one piece, i.e. the connection between the control device and the valve housing. This simplifies the construction of the valve. The number of parts used to assemble the valve is less than prior art valves because the socket of the thermostat head can be omitted entirely.

Preferably, the control means has the form of a ring. The ring may be rotated, for example, relative to the housing in order to change the setting of the valve.

Preferably, the control means is formed in at least two parts connected in the circumferential direction. When the sections are separated, they may be positioned around a portion of the valve housing. When they are in place, they can be connected together, holding the valve housing and the thermostatic element together and at the same time allowing the setting value to be adjusted, for example by moving the thermostatic element in a direction towards the valve seat or away from the valve seat. The setpoint is a temperature setpoint.

Preferably, the parts are connected by a snap connection. A snap connection connects these parts by simply pressing them together. The catch mechanism prevents these parts from separating.

In a preferred embodiment, the parts are non-detachably connected. When the parts are mounted together, they can only be removed if they or the connection between them is broken. In this way, the thermostatic element cannot be removed from the valve.

Preferably, the thermostatic element comprises a shoulder which is received in a groove shape, formed in a wall of the control device surrounding the thermostatic element. The combination of the shoulder and the recess gives a simple form of axial connection between the control means and the thermostatic element, in some cases while allowing the control means to rotate relative to the thermostatic element. In this way, the position of the thermostatic element can be changed, for example by rotating the control device relative to the housing.

In a preferred embodiment, the thermostatic element, except for the connecting portion, projects completely from the control device. The thermostatic element is also almost completely visible and is only held in the control device within the connecting portion. The fact that most thermostatic elements are visible brings the advantage that the thermostatic element is better resistant to inlet temperature dependence. The reason is that it is more difficult for the temperature of the heating or cooling medium controlled by the valve to heat the thermostatic element than if a plastic housing were always provided, since heat can be transferred from the plastic part to the plastic part. Furthermore, the thermostatic element is almost completely exposed to the ambient air so that a rather fast reaction of the thermostatic element to a temperature change of the ambient air can be achieved.

Preferably, the control device and the housing together form a thread pair comprising a first thread on the valve housing, preferably on the outside of the valve housing or on a part connected to the housing, and a second thread in the control device, in particular in an inner wall of the control device. The inner wall may be the same wall as the recess that receives the shoulder for the thermostatic element. However, the inner wall may include a step dividing the inner wall in different portions. The use of a screw thread pair is a simple way of producing a movement of the thermostatic element to or from the valve seat when rotating the control device.

Preferably, the first thread is divided into at least two portions along the circumferential direction. This means that the thread turns are interrupted in the circumferential direction. In principle, it is sufficient to use only a single thread turn in the first thread. This makes the structure even simpler.

In a preferred embodiment, the second thread forms an end stop at least in the direction of movement of the control device away from the valve seat. Thus, the control device cannot be removed from the valve housing by rotating it. This rotation is blocked at the end stop.

Preferably, a scale is made on the exterior of the valve housing, the control forming an indicator that indicates on the scale. The indicator may be implemented by an edge of the control device. In this way, an indication can be given of the set point that the control device has adjusted.

Preferably, the valve element is connected to a valve stem, on which the thermostatic element acts directly. In this way, the use of an intermediate push rod between the thermostatic element and the valve stem is not required. The fewer components used, the simpler the structure.

Drawings

Preferred examples of the present invention will now be described in more detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic cross-section through a thermostatically controlled valve;

FIG. 2 is a perspective view of the thermostatically controlled valve of FIG. 1, with the control device partially broken away;

FIG. 3 is a perspective view of the valve of FIG. 1 with the control device in a fully closed position; and

FIG. 4 is a perspective view of a thermostatically controlled valve with the control device in a fully open position.

Detailed Description

Fig. 1 schematically shows a cross-section of a thermostatically controlled valve 1. The valve 1 comprises a valve housing 2. The valve housing 2 has an inlet 3 and an outlet 4, with a valve seat 5 arranged between the inlet 3 and the outlet 4. However, other forms of valve housings, such as angled housings, may be used.

The valve housing 2 takes the form of an inverted "T". The inlet 3 and outlet 4 are arranged in the arms of the "T". The axis 6 of the housing extends perpendicular to an imaginary line connecting the inlet 3 and the outlet 4.

The valve element 7 is movable between a position in which it contacts the valve seat 5 and cuts off the connection between the inlet 3 and the outlet 4, and a position away from the valve seat 5, in which valve seat 5 there is a passage from the inlet 3 to the outlet 4. The distance between the valve element 7 and the valve seat 5 is a parameter defining the volumetric flow of heating liquid to the radiator of the connection valve 1 or the volumetric flow of cooling liquid to the cooling unit of the connection valve 1, respectively.

The valve element 7 is connected to a stem 8. The rod 8 extends parallel to the axis of the shaft 6 of the valve housing 2. In this example, the end 9 of the rod 8 projects outwards from the shaft 6.

The sealing package 10 is arranged in the shaft 6 of the valve housing 2, preventing the heating or cooling liquid in the valve housing 2 between the inlet 3 and the outlet 4 from leaking to the outside via the shaft 6. In the present example, the sealed package 10 comprises several O-

rings

11, 12, 13. However, the form of the sealed package 10 may vary.

An expanding spring 14 is arranged to act on the rod 8 via a stop means 15. The expanding spring 14 acts on the stem 8 in a direction away from the valve seat 5. In other words, when no additional force acts on the stem 8, the valve element 7 moves as far away from the valve seat 5 as possible.

The thermostatic element 16 is mechanically connected to the valve housing 2, more precisely to the shaft 6 of the valve housing 2, as will be explained later. The thermostatic element 16 comprises a filling 17 of a material that expands with increasing temperature. The packing 17 is arranged in a chamber which is bounded on its inner side by a thermostatic control 18. The thermostatic element 16 further comprises a filler element 19 arranged in the thermostat 18, the end 9 of the rod 8 being inserted in the filler element 19. The filler element 19 serves as a fitting for the thermostatic element 16 to the rod 8. When the rod 8 is sufficiently long, the filler element may be omitted.

The thermostatic element 16 acts directly on the valve stem 8, i.e. no intermediate element is required to transmit force from the thermostatic element 16 to the stem 8.

In the diagram shown in fig. 1, the filling 17 of the thermostatic element 16 has expanded so that the thermostat 18 is compressed, the valve element 7 being pressed against the valve seat 5. As the ambient air temperature becomes lower, the volume of the packing 17 decreases and the thermostat 18 can expand so that the expanding spring 14 moves the valve element 7 away from the valve seat 5.

A control device 20 in the form of a ring is used to connect the thermostatic element 16 to the valve housing 2 while allowing the position of the thermostatic element 16 relative to the valve housing 2 to be adjusted.

For this purpose, the thermostatic element 16 comprises a shoulder 21, which is housed in a recess 22 formed in the control device 20. The shoulder and the recess 22 allow the control device 20 to rotate relative to the thermostatic element 16, if required. However, in a direction parallel to the rod 8, the thermostatic element 16 is fixedly positioned in the control device 20.

When the position of the control device 20 relative to the housing 2 is adjusted, the position of the thermostatic element 16 relative to the housing 2 is also adjusted.

This adjustment can be performed, for example, by means of a thread pair as shown in fig. 2.

In fig. 2 the same elements are provided with the same reference numerals.

The first thread 23 is arranged on the outside of the valve housing 2, more precisely on the outside of the shaft 6. This first thread 23 comprises only a single thread turn (thread turn) on the side visible in fig. 2, and another similar thread turn on the opposite side of the shaft 6. In other words, the first thread 23 is divided into at least two portions along the circumferential direction.

The control device 20 comprises a second thread 24 engaging the first thread 23. The second thread 24 has a number of thread turns. However, these screw threads are limited in length, so that the control device 20 can be rotated relative to the housing 2, only relative to the position, wherein the second screw thread is formed at the end stop.

As can be seen in fig. 1 and 2, the thermostatic element 16 protrudes completely from the control device 20. Only the connecting portion remains in the control device 20, as can be seen from fig. 1. This has the advantage that the thermostatic element 16 is exposed to the surrounding air, which enables the thermostatic element to react well to changes in the temperature of the surrounding air. There is no or only very little thermal resistance between the ambient air and the thermostatic element 16.

On top of the thermostatic element 16, a label 25, for example with a logo or the like, is placed.

The control means 20 is in the form of a ring. The control means is in the form of at least two parts connected in a circumferential direction. In fig. 2, only a portion 26 of the control device 20 is shown.

The portions 26 of the control device 20 may be identical. Each section includes a hooking protrusion 27 and a corresponding hooking opening 28. When the control device 20 is made of two halves or portions 26, which are arranged around the shaft 6 of the valve housing 2, the thermostatic element 16 receives the shoulder 21 in the recess 22 and places the second thread 24 of the portion 26 onto the first thread 23. Once the portions 26 have been placed in this position, they can be pressed together so that they are connected by the snap connection achieved by the snap projections 27 and the snap openings 28. In this way, the portions 26 are non-releasably connected together. When the clasp detects being opened, at least one of the portions 26 is damaged so that it can no longer be used. The thread pairs may be implemented in other ways. A part connected to the valve housing and carrying the first thread 23 may be used. It is also possible to use a recess in the valve housing 2 and a thread turn in the control device 20. In any case, this thread pair allows a translational movement of the thermostatic element 16 when the control device 20 is rotated relative to the valve housing 2. The set point 1 of the valve can thus be adjusted by rotating the control device 20 relative to the valve housing 2.

It should be noted that the portions 26 may be connected in other ways, such as by ultrasonic welding, screw/nut connection, etc. It is also conceivable for two screws with countersunk heads to be screwed from one part 26 into a thread in the other part 26. In this example, a screw that rotates in only one direction may be used.

The invention is not, however, limited to a threaded connection between the control device 20 and the valve housing 2.

The shaft 6 of the valve housing 2 comprises a scale 29. As can be seen in fig. 3 and 4, the control device 20 forms an indicator (pointer) 30, in the present example the indicator 30 is the edge of the control device 20 on the side facing the valve housing 2.

Fig. 3 shows the valve 1 with the thermostatic element 16, the thermostatic element 16 moving in a position in which the valve 1 has a relatively low set point. The scale 29 is hardly visible.

In fig. 4, the thermostatic element 16 has been moved by the control device 20 to a position in which the set value of the valve 1 is maximum. A large portion of the scale 29 is visible.

Claims

1. A thermostatically controlled valve (1) comprising: -a valve housing (2) having an inlet (3), an outlet (4) and a valve seat (5) positioned between the inlet (3) and the outlet (4), -a valve element (7) movable relative to the valve seat (5), -a thermostatic element (16) acting on the valve element (7), and-a control device (20) for adjusting a set point for the valve (1), characterized in that: the control device (20) engages the valve housing (2), the thermostatic element being mounted directly on the valve housing (2), the control device connecting the thermostatic element (16) and the valve housing (2), and

the valve housing (2) is an integrated valve body.

2. The valve of claim 1, wherein: the control device (20) has the form of a ring.

3. The valve according to claim 1 or 2, wherein: the control device (20) is formed by at least two parts (26) connected in the circumferential direction.

4. The valve of claim 3, wherein: the portions (26) are connected by a snap connection.

5. The valve of claim 3, wherein: the portions (26) are non-detachably connected.

6. The valve of claim 1, wherein: the thermostatic element (16) comprises a shoulder (21), said shoulder (21) being housed in a recess (22) formed in a wall of the control device (20) surrounding the thermostatic element (16).

7. The valve of claim 6, wherein: the thermostatic element (16) projects completely from the control device (20) except for the connecting portion.

8. The valve of claim 1, wherein: the control device (20) and the valve housing (2) together form a thread pair comprising a first thread (23) on the exterior of the valve housing (2) or on the part connected to the valve housing (2), and a second thread (24) in the inner wall in the control device (20).

9. The valve of claim 8, wherein: at least one of the first thread (23) and the second thread (24) is divided into at least two portions in the circumferential direction.

10. The valve according to claim 8 or 9, wherein: one of the first thread and the second thread (24) forms an end stop at least in the direction of movement of the control device (20) away from the valve seat (5).

11. The valve of claim 1, wherein: a scale (29) is made on the exterior of the valve housing (2), the control device (20) forming an indicator (30) which indicates on the scale.

12. The valve of claim 1, wherein: the valve element (7) is connected to a valve stem (8), the thermostatic element (16) acting directly on the valve stem (8).

13. Valve according to claim 12, the valve stem (8) being inserted into the thermostatic element (16).

14. A valve according to claim 12, characterized in that the valve housing (2) has an axis (6), the valve stem (8) extending parallel to the axis (6) of the valve housing (2).

15. Valve according to claim 1, the valve housing (2) having a shaft (6), the thermostatic element (16) being connected to the shaft (6) of the valve housing (2).

16. Valve according to claim 1, characterized in that the valve housing (2) takes the form of an inverted "T".

17. The valve of claim 1, wherein the valve is a radiator valve.