EP1520080A1

EP1520080A1 - Control valve for a door closer or hydraulic rotating leaf drive

Info

Publication number: EP1520080A1
Application number: EP03740324A
Authority: EP
Inventors: Stephan Gosch
Original assignee: Dorma Deutschland GmbH
Current assignee: Dorma Deutschland GmbH
Priority date: 2002-06-27
Filing date: 2003-06-25
Publication date: 2005-04-06
Also published as: DE10228872A1; WO2004003324A1; DE10228872B4; AU2003279794A1

Abstract

The invention relates to a control valve for a door closer and a hydraulic rotating leaf drive which is provided with an adjusting screw (1) and a valve sleeve (2) which is connected thereto. In order to construct a control valve of the above type, which can compensate alignment between the centre axis of the adjusting screw thread and the centre axis of the guide area, thereby preventing the valve sleeve (2) from rotating and in order to ensure a modular structure at minimal expenditure corresponding to specific conditions of use, the adjusting screw (1) and the valve sleeve (2) are connected to each other by means of a snap-on connection (14).

Description

Title: Regulating valve for a door closer or hydraulic swing door operator

description

The invention relates to a regulating valve with an adjusting screw and an associated valve sleeve for a door closer or hydraulic swing door drive.

Such regulating valves are generally known and are used for a wide variety of purposes. The regulating valve is screwed with its adjusting screw into an adjusting thread and the valve sleeve is guided in a guide area. When producing the adjustment thread and the guide area, misalignments can repeatedly occur between the center axis of the adjustment thread and the center axis of the guide area. This leads to problems with valve actuation. It can also happen that the valve sleeve rotates when the valve is actuated, which changes the throttle cross section. Since a special regulating valve is also required for each application, which must be adapted to the respective cross-section of the guide area, in particular in the area of the valve sleeve, a large number of valve sleeves are required, which must additionally have a throttle cross-section that is optimally adapted to the respective flow medium.

A regulating valve which is used in a door closer can be found in US 1,770,250. This valve is manufactured as a one-piece part, ie valve body and adjusting screw are one. In the valve body, a groove is made on the elongated stem. In a second exemplary embodiment, the valve body and adjusting screw are separated from one another. The German utility model G 92 03 872 discloses a door closer with a fluid throttle valve, which ensures thermostatic throttling in the event of fluctuating temperatures. To achieve a set closing speed of the damping medium, even in the event of changes in temperature, this is achieved by providing an area on the valve seat which has a curved course. Alternatively, the wall of the flow channel can also be designed accordingly. This measure is intended to ensure that the throttle gap does not change linearly with corresponding temperature fluctuations.

No. 4,148,111 shows a throttle valve for a door closer, which consists of two parts. The valve stem is conical and is pressed into the valve body, which has an external thread and is adjustable, by means of a cylindrical extension. The connection of a valve cone to a head of a valve spindle is taken from DE 1 958 503. The valve cone is held on the valve spindle by means of a bore running transversely to the longitudinal axis and pinning to be inserted therein.

It is therefore an object of the present invention to provide a regulating valve of the type described at the outset, which can compensate for misalignments between the central axis of the adjustment thread and the central axis of the guide area, which further prevents rotation of the valve sleeve and which, by means of a modular structure, requires little effort to match Operating conditions can be adjusted.

This object is achieved by the features specified in claim 1. Advantageous further developments result from the subclaims.

The regulating valve according to the invention has the advantage that it is due to a snap connection between an adjusting screw and a valve. tilhülse allows mobility between the adjusting screw and the valve sleeve, so that misalignments can be easily compensated. In addition, a snap connection is easily detachable, so that different operating conditions can be taken into account by simply replacing the valve sleeve.

According to an advantageous development, the snap connection is designed as a ball joint connection. Such a ball-and-socket joint ensures, with a simple construction, good and all-round mobility of the valve sleeve with respect to the adjusting screw, so that misalignments can be easily and easily compensated for.

According to a preferred embodiment, the valve sleeve consists of plastic, in particular of an electrically conductive material.

In order to prevent twisting of the valve sleeve and thus to maintain the basic shape of the throttle cross section, the valve sleeve is provided with an anti-twist device according to a preferred development.

The anti-rotation device can advantageously be designed as an extension which is guided in a longitudinally movable manner in a groove in the valve housing. According to an alternative embodiment, the anti-rotation device can also be formed by an eccentric offset of the central axis of the adjusting screw to the central axis of the valve sleeve. Both design variants represent an effective anti-rotation device in a simple manner, in which the basic shape of the throttle cross section can be maintained under any conditions.

According to an advantageous development, the valve sleeve can be designed as a valve pin. This enables a simple and quick adjustment of the regulating valve to a wide variety of requirements, since the The valve sleeve or the valve pin can simply be plugged onto the adjusting screw via the snap connection.

In order to further improve the adaptation and also the insensitivity to clogging, in an advantageous further development the valve sleeves with different flow cross-sections, eg. B. in the form of a triangle, a circle or a rectangle, are interchangeably attached to the adjusting screw. In this way, a requirement, namely a low sensitivity of the throttle cross-section to clogging due to contamination of the flow medium, can be met. Contamination occurs particularly with small flow cross-sections and thus decisively change the flow rate of the valve. A flow cross-section must therefore be sought which has a low tendency to blockages and at the same time the basic shape is not changed by the adjustment of the cross-section.

In the same way, valve pins with different cone angles and / or different valve pin lengths can be attached to the adjusting screw. Different valve pin lengths can be used to react to the different viscosity behavior of different oils so that a so-called thermoconstant valve can be implemented, even if a different oil is to be used with the same regulating valve. With a change in the valve pin length, an adaptation to the viscosity behavior of the respective oil can take place.

Adaptation to different valve pin lengths is particularly simple if, according to a preferred embodiment, identical or different intermediate links are provided which are plugged together until the required valve pin length is reached.

The intermediate links are preferably connected to one another via a snap connection, in particular a ball joint connection. dung. This not only ensures a simple and quick connection of the intermediate links to one another, but also takes into account possible misalignments between the central axis of the adjusting screw and the central axis of the guide area for the valve sleeve or the valve pin.

According to a preferred embodiment, an insert, in particular in the form of a filter or a magnet, is arranged in the valve sleeve. This makes it possible to generally bind impurities or metallic particles in order to prevent the throttle cross-section from becoming clogged.

According to an advantageous development, a triangle and preferably an equilateral triangle is used as the throttle cross section. Such a cross-section, while maintaining the basic shape of the throttle cross-section during the adjustment of the valve, has a low sensitivity to clogging by impurities and a progressive change in the throttle cross-section takes place depending on the adjustment parameters. The shape of the triangular cross section also plays a crucial role. The isosceles triangle represents the optimal cross-sectional shape compared to all other triangular cross-sections.

A constant basic shape of the throttle cross-section can advantageously be achieved in that an outflow or inlet bore connected to the regulating valve is laterally offset from the valve sleeve bore.

In order to ensure a low temperature dependence of the throttle resistance, an orifice-shaped resistor with a short flow length is required. This requirement is particularly easy to implement if, according to a preferred embodiment, the valve sleeve has a small wall thickness with an expanding throttle cross section.

Further features and advantages of the invention result from the following description of preferred exemplary embodiments.

Show it:

FIG. 1: a cross section through an inventive regulating valve according to a first embodiment,

FIG. 1 a: an embodiment variant of the regulating valve according to the invention,

FIG. 1 b: a further embodiment variant of the regulating valve according to the invention,

FIG. 2 shows a cross section through the regulating valve according to the invention in the disassembled state,

FIGS. 3 and 4: the regulating valve according to the invention in further embodiments,

FIG. 5: a cross section through the regulating valve according to FIG. 3, in the installed state,

FIGS. 6 to 11: further embodiments of the regulating valve according to the invention,

Figures 12 and 13: a cross section through the invention

Regulating valve in two different positions,

Figures 14 and 15: a cross section through the valve sleeve according to two different embodiments and Diagram 1: the opening characteristics with different

Querschπittsformen.

In the figures, a regulating valve according to the invention is shown and explained in preferred exemplary embodiments.

Figures 1 and 2 show a first embodiment of the regulating valve according to the invention. The regulating valve essentially consists of an adjusting screw 1 and a valve sleeve 2. The adjusting screw 1 and the valve sleeve 2 are connected to one another via a snap connection 14. In the exemplary embodiment shown, the snap connection 14 consists of a part of a ball joint connection 15 which is provided at the end of the adjusting screw 1 directed towards the valve sleeve 2 and which cooperates with a second part of a ball joint connection 16 arranged on the valve sleeve 2. A seal 3 is also provided for sealing to the outside, which is arranged on the adjusting screw 1 in the exemplary embodiment shown, but can also be provided in the region of the valve sleeve 2. On the adjusting screw 1 there is a thread 13 for regulating the regulating valve, which thread is present in a housing of a door closer or a swing door operator.

The valve sleeve 2 is preferably made of plastic and is in particular made of an electrically conductive material.

FIGS. 3 to 5 show further embodiments of the regulating valve according to the invention which prevent the valve sleeve 2 from rotating in the inserted state in the housing 16 and thus ensure that the basic shape of the throttle cross section is maintained.

For this purpose, the valve sleeve 2 z. B. equipped with an anti-rotation device 4, which according to the embodiment according to Figures 3 and 5 as an approach is trained. This approach is guided longitudinally in a groove 5 in the valve housing 19. According to the embodiment according to FIG. 4, the anti-rotation device 4 is realized by an eccentric offset of a central axis 17 of the adjusting screw 1 to a central axis 6 of the valve sleeve 2. This embodiment is particularly suitable if there are misalignments between the adjusting screw 1 and the valve sleeve 2. The misalignment is eliminated by the eccentric offset.

Figures 1a, 1b and 6 to 9 show further variants of the regulating valve according to the invention.

The modular structure of the regulating valve makes it possible to easily adapt the regulating valve to a wide variety of requirements. Figures 1a and 1b show different valve sleeves 2, which can be used depending on the purpose. The valve sleeve 2 can of course have different throttle cross sections (triangular, circular, rectangular cross sections, etc.) and can be replaced by the snap connection 14. As FIGS. 1, 1a, 1b, 2 to 5 show in particular, the valve sleeve 2 has a free cut 18 on the inside, which realizes a short flow length. The valve sleeve 2 can also be replaced by a valve pin 7, as shown in FIGS. 6 to 9. The valve pin 7 can have different cone angles and / or different valve pin lengths. In a particularly simple manner, the valve pin length can be achieved by using identical intermediate links 8, the intermediate links 8 each having a snap connection 14, for. B. a ball joint, are connected to each other.

According to an embodiment variant shown in FIGS. 10 and 11, an insert can be provided in the valve sleeve 2 in the free cut 18. Such use makes it possible to remove contaminants in the liquid binding circulation and thus prevents a possible clogging of the throttle cross-section. According to FIG. 10, the insert can be designed as a filter 9 if general impurities are to be retained, or according to FIG. 11 also as a magnet 10 if it is specifically about metallic particles.

According to FIGS. 5, 12 and 13 of the installation examples, the throttle cross section in the valve sleeve 2 is designed as a triangle and preferably as an equilateral triangle. On the one hand, this configuration fulfills the requirement for a low sensitivity to clogging, since it provides a large hydraulic cross-section, and, on the other hand, the requirement for maintaining the basic shape of the throttle cross-section during the adjustment process, since the basic shape always remains an equilateral triangle. The requirement for a constant basic shape of the throttle cross section can be supported in particular by the fact that the drain or inlet bore 11 in the valve housing 19 is arranged laterally offset from the bore for the valve sleeve 2.

FIGS. 14 and 15 show a valve sleeve 2 in which an orifice-like resistance with a short flow length is achieved by a small wall thickness of the valve sleeve 2 with an expanding throttle cross section 12 while maintaining the basic shape. This results in a low temperature dependence of the throttle resistance.

In order to ensure a progressive change in the throttle cross-section depending on the adjustment parameter, the regulating valve requires a high resolution. This means that with small throttle cross-sections, a sensitive adjustment of the throttle cross-section should be guaranteed. As can be seen from Diagram 1, this requirement is best met by an equilateral triangle, since here the opening characteristic A = f (s) has a smaller increase in the lower area of the adjustment stroke than in the upper area.

The preceding description of the exemplary embodiments of the present invention serves only for illustrative purposes and not for the purpose of restricting the invention. Various changes and modifications are possible within the scope of the invention without leaving the scope of the invention and its equivalents.

LIST OF REFERENCE NUMBERS

1 adjusting screw

2 valve sleeve

3 seal

4 anti-rotation device

5 groove

6 central axis valve sleeve

7 valve pin

8 pontics

9 filters

10 magnet

11 drain or inlet hole

12 throttle cross section

13 threads

14 snap connection

15 ball joint connection

16 ball joint connection

17 adjusting screw center axis

18 free cut

19 valve housing

Claims

claims

1. regulating valve, in particular for a door closer or hydraulic rotary leaf drive, with an adjusting screw and a valve sleeve connected thereto, characterized in that the adjusting screw (1) and the valve sleeve (2) are connected to one another via a snap connection (14).

2. Regulating valve according to claim 1, characterized in that the snap connection (14) is designed as a ball joint connection (15, 16).

3. Control valve according to one of the preceding claims, characterized in that the valve sleeve (2) consists of plastic, in particular of an electrically conductive material.

4. Control valve according to one of the preceding claims, characterized in that the valve sleeve (2) is provided with an anti-rotation device (4).

5. Control valve according to one of the preceding claims, characterized in that the anti-rotation device (4) is designed as a projection which is guided in a longitudinally movable manner in a groove (5) in the valve housing (19).

6. Control valve according to one of the preceding claims, characterized in that the anti-rotation device (4) is formed by an eccentric offset of a central axis (17) of the adjusting screw (1) to a central axis (6) of the valve sleeve (2).

7. Control valve according to one of the preceding claims, characterized in that the valve sleeve (2) is designed as a valve pin (7).

8. Control valve according to one of the preceding claims, characterized in that valve sleeves (2) with different cross sections on the adjusting screw (1) can be attached.

9. Control valve according to one of the preceding claims, characterized in that valve pins (7) with different cone angles and / or different valve pin lengths can be attached to the adjusting screw (1).

10. Control valve according to one of the preceding claims, characterized in that intermediate members (8) of identical construction are provided for producing different valve pin lengths.

11. Control valve according to one of the preceding claims, characterized in that the intermediate members (8) via a snap connection (14), in particular a ball joint connection, can be connected to one another.

12. Control valve according to one of the preceding claims, characterized in that an insert, in particular in the form of a filter (9) or a magnet (10), is arranged in the valve sleeve (2).

13. Control valve according to one of the preceding claims, characterized in that a triangle and preferably an equilateral triangle is provided as the throttle cross section.

14. Regulating valve according to one of the preceding claims, characterized in that a connected with the regulating valve Ab- flow or inlet bore (11) is laterally offset to the valve sleeve bore.

15. Control valve according to one of the preceding claims, characterized in that the valve sleeve (2) has a small wall thickness with an expanding throttle cross-section (12).