EP2767660A2 - Control valve for the regulation of a hydraulic volume flow - Google Patents

Abstract

The control valve (10) has a valve main portion (20) that is provided with a valve inlet (22), a valve outlet (24) and an interior (26) having a first sealing surface (28). A regulating component (30) is provided with a fluid inlet (42) and a fluid outlet (44), and is arranged rotatably in the interior of the valve main portion about a rotation axis (R). A second sealing surface (32) is provided to form a sealing seat together with the first sealing surface. The central axis (M) is spaced from the valve outlet and/or the fluid outlet from the rotational axis. An independent claim is included for a method for preparing regulating valve.

Description

The present invention relates to a regulating valve for the regulation of a hydraulic volume flow, a door closer for a door, comprising at least one regulating valve and a method for the production of a regulating valve.

Regulating valves for the regulation of a hydraulic flow are known in principle. They often have one of two different designs. A first construction is z. B. a so-called needle valve, in which a Regulierkörper can be moved along a translation axis. In this case, the Regulierbauteil detached from a corresponding sealing seat and releases a so-called annular gap. Also known are regulating valves, in which the Regulierbauteil is rotationally moved about an axis of rotation. In this case, different cross-sectional cross-sections are provided between a fluid outlet of the regulating valve and a valve outlet of a valve body, which can be changed by the rotation.

A disadvantage of known regulating valves, in particular in the case of the so-called needle valves, is the annular gap that forms. Thus, a ratio between the circumference and the cross-section is provided by the annular gap, which has a relatively high sensitivity with regard to the dependence of the volume flow rate of the temperature and impurities. Thus, a relatively large peripheral surface is responsible for the fact that, despite sufficient flow cross-section, even small impurities can block such an annular gap. This would lead to undesirable Verregulierung, so to a change in the set and desired flow rate. In known regulating valves which act via rotating regulating components, it is in principle possible to provide a better ratio between the circumference and the cross-section, but here there is a disadvantage with regard to the very complex production. Thus, valve outlet and valve inlet are to be provided at least in their mouth areas with a correspondingly complicated cross section, which differs in particular from a round cross section. Such complex cross sections can only be achieved with special tools or with grinding, in particular in a manual manner. Therefore, such trained regulating valves are very expensive and are rarely used in mass components.

It is an object of the present invention to at least partially overcome the disadvantages described above. In particular, it is the object of the present invention to provide a regulating valve, a door closer and a method for the production of a regulating valve, which provide a regulating valve in a cost-effective and simple manner which avoids or at least reduces the danger of regulation.

The above object is achieved by a regulating valve for the regulation of a hydraulic volume flow with the features of claim 1, a door closer with the features of claim 10 and a method having the features of claim 11. Further features and details of the invention will become apparent from the dependent claims Description and the drawings. In this case, features and details that are described in connection with the regulating valve according to the invention apply, of course, also in connection with the invention Door closer and the method according to the invention and in each case vice versa, so that with respect to the disclosure of the individual aspects of the invention always reciprocal reference is or may be.

A regulating valve according to the invention serves to regulate a hydraulic volume flow and has a valve body with a valve inlet, a valve outlet and an interior space. In addition, the interior has a first sealing surface, in which the valve outlet opens. A regulating valve according to the invention is characterized in that a regulating component with a fluid inlet and a fluid outlet in the interior of the valve body is arranged to be rotatable about an axis of rotation. This rotating component has a second sealing surface which forms a sealing seat with the first sealing surface. In this second sealing surface of the fluid outlet opens. In this case, the central axis of the valve outlet and / or the fluid outlet is spaced from the axis of rotation.

An inventive regulating valve serves to regulate the hydraulic volume flow z. B. in a damping device of a door closer. For this purpose, variations of the flow cross section are necessary in order to be able to set different volume flows over different flow cross sections. In the regulating valve according to the invention, the flow cross-section is made possible by a different overlapping of the mouths of the valve outlet and the fluid outlet in the correlating mouth regions of the sealing seat. If the fluid outlet and valve outlet are completely aligned, the largest flow cross-section is given. If the regulating component is rotated about its axis of rotation until there is no longer any overlap between the valve outlet and the fluid outlet, then the regulating valve seals completely and there is no longer any possibility for fluid flow. Any rotation adjustment of the regulating component is possible between these two positions, so that the intersection and therefore also the flow cross-section made available can be adjusted substantially freely and steplessly.

In accordance with the invention, at least the valve outlet and / or the fluid outlet is arranged offset drilled. This means that the central axis of the valve outlet and / or the fluid outlet is arranged at a distance from the axis of rotation of the regulating component. In this case, the center axis relates at least to the area of the orifice, so that curved central axes are also possible over the course of the valve outlet or the fluid outlet. Is z. B. the valve body is formed as a substantially rotationally symmetric component, so inside its interior will also have a rotationally symmetrical design to accommodate the rotationally symmetrical Regulierbauteil. For this rotational symmetry, the axis of rotation is also the axis of symmetry. A spacing of the central axis of the valve outlet from this axis of rotation causes the associated bore of the valve outlet to shift laterally. This shift results in a change in the mouth contour of the valve outlet in the interior. The greater the distance between the central axis of the valve outlet and the axis of rotation, the larger the mouth area or the longer becomes the mouth contour of the valve outlet. The mouth contour is defined as the border of the valve outlet, which results as a section line of the inner surface of the valve outlet with the inner surface of the interior. The mouth area is the area which is enclosed in a curved manner by the mouth contour. Thus, this displacement of the central axis away from the axis of rotation not only leads to an enlargement of the mouth contour, but also to a distortion, since it is an intersection between two curved surfaces. This intersection will result in different opening widths being available in the direction of the axis of rotation. This is of great advantage since, with a rotation of the regulating component about the axis of rotation, a varying flow cross-section now also exists depending on the available width. Thus, the effect according to the invention can be achieved in a particularly simple and cost-effective manner, namely by simply displacing the associated bore of the valve outlet and / or the fluid outlet.

In other words, the mouth contour and thus the mouth surface of the valve outlet and / or widened in the same way the fluid outlet widened. This widening means that the regulation can be carried out by means of a relative rotation of the regulating component relative to the valve body in a wider angular range. The wider this angular range is and the finer the gradations in the intersection, the finer the adjustment can be made using such a regulating valve. In addition, particularly large flow cross-sections are to be achieved in this way, even with small holes, that as a maximum control value for the regulation and a particularly large volume flow is possible.

In summary, a control valve according to the invention with a simple and cost-effective production brings a high variability and, especially in the circumferential direction, a particularly large regulating clearance or regulating angle.

For the purposes of the present invention, central axes are, in particular, the axes of rotation of the valve outlet and of the fluid outlet, which are preferably designed as round or essentially round bores are. The spacing of the central axis of the fluid outlet and / or the valve outlet from the axis of rotation according to the invention can also be referred to as a geometric arrangement of two wind-skewed straight lines. These are indeed z. B. in their projection may be perpendicular to each other, but do not intersect.

A regulating valve according to the invention can be further developed such that a spring device is provided, which acts on the regulating component in the direction of the sealing seat with a spring force. This spring device serves to provide a sealing force on the sealing seat with the spring force. In particular, this spring device is adjustable, for. B. by means of a threaded device, as will be explained later. In addition to the generation of a sealing force brings a spring device, the possibility of overpressure protection with it. Thus, over the biasing force, which is applied with the spring device on the Regulierbauteil, a free spring travel can be specified from the sealing seat out. If the applied pressure at the regulating component exceeds a maximum pressure, which correlates with the applied spring force, the regulating component can lift off from the sealing seat against the applied spring force and release an annular gap. Thus, the available flow cross-section is suddenly increased and the applied pressure can be reduced. In this way, can be done inexpensively simple and especially in a particularly compact design, a reduction in the risk that a control valve according to the invention obtained at too high pressure damage.

It is furthermore advantageous if, in the case of a regulating valve according to the invention, at least one fastening means for the axial fastening of the regulating component to the valve body is provided. Such a fastener may, for. B. a union nut with a thread or a Be counter nut. Schnapprastvorrichtungen are conceivable in the context of the present invention. These fastening means are preferably designed to apply a biasing force or a sealing force to the regulating component in the direction of the sealing seat. Such fastening means can also be used in combination with the spring device, so that the spring device is supported against such a fastening means. This can be set in a particularly cost-effective and simple manner, the biasing force of this spring device and thus the sealing force and the triggering force of the overpressure function.

It is also advantageous if, in a regulating valve according to the invention, the valve outlet and / or the fluid outlet are designed as a bore with a round or essentially round cross section. Hereby, a particularly simple and inexpensive production can be achieved. Using a drill, valve outlet and / or fluid outlet can be made. Despite the particularly simple and cost-effective production, the effect according to the invention of a wide regulation width or a large regulation angle is achieved because the offset of the central axis of the respective bore from the axis of rotation changes, as described, the muzzle contour and thus the muzzle area, in particular increases.

A further advantage is when a threading device is provided in a regulating valve according to the invention to apply a biasing force to the regulating member. This threaded device is in particular combined with a spring device, so that via the thread device, an adjustment of the biasing force and thus the sealing force and the release force of the overpressure function is possible. This thread device is z. B. correlated with a fastener and to this arranged. Preferably, the thread device is equipped with a fine thread, so that a particularly fine and accurate adjustment of the applied biasing force is possible.

A regulating valve according to the invention can be developed in such a way that, with respect to the axis of rotation, the mouth of the valve outlet and the mouth of the fluid outlet are at the same or substantially the same axial height. The axial height is related to the axis of rotation, so that an overlap or an overlap of the mouth surfaces of the valve outlet and the mouth surface of the fluid outlet is possible. If the two outlets are at the same height, this means that, in particular, the central axes of the fluid outlet and the valve outlet run in one or essentially in a common plane. This makes it possible to achieve a maximum overlap of the two mouth surfaces, so that with the given geometric dimensions of fluid outlet and valve outlet and the maximum flow area can be achieved. This is ensured in particular by the position of the sealing seat, that is to say the relative position of the first and second sealing surfaces relative to one another and the associated geometric positioning of fluid outlet and valve outlet. Accordingly, valve outlet and fluid outlet can of course also have different diameters and correspondingly different sized orifice surfaces. Usually, a displacement of the central axis of the rotation axis in the valve body will bring a greater differentiation with the regulating valve according to the invention, since the radii compared to the Regulierbauteil larger and accordingly the distance to the axis of rotation can also be chosen larger. In addition, it is advantageous if, in the case of a regulating valve according to the invention, the fluid inlet runs parallel, in particular coaxially, with the axis of rotation and has a larger diameter than the fluid outlet. This makes it possible to perform a parallel displacement of the fluid outlet and still achieve a sufficiently large sectional opening between the two holes of the fluid inlet and the fluid outlet. This is a particularly simple and cost-effective way to provide a displacement in terms of the fluid outlet according to the invention. Also simple and straight holes are possible, which bring the invention muzzle broadening with it.

It is also advantageous if, in a regulating valve according to the invention, the regulating component has an outer wall which projects below the second sealing surface at least in sections into the valve inlet. This questioning can z. B. be used for centering the Regulierbauteils. In particular, there is thus a section-wise frictional contact between the outer surface or the outer wall and the valve inlet. It is also possible to provide a rotatory storage location in this way. It should be noted that this is not necessarily an additional sealing surface is generated, but on particularly smooth rotatory bearing value is placed.

A further advantage is when, in a regulating valve according to the invention, the valve outlet has a larger diameter than the fluid outlet. In this way, manufacturing tolerances of Regulierbauteils be particularly cost-effective and easy to accept. In particular, these manufacturing tolerances on the height positions in the axial direction of the regulating component for the fluid outlet are crucial. To ensure the greatest possible overlap of the two mouth surfaces To achieve this, a larger tolerance for the position of the fluid outlet can be accepted by the increased diameter of the valve outlet. This can cost and easily reduces the production cost and still the quality of the invention for a regulating valve are provided.

Another object of the present invention is a door closer for a door, comprising at least one inventive control valve for regulating the damping of at least part of the door movement. Accordingly, a door closer according to the invention brings the same advantages as have been explained in detail with reference to a regulating valve according to the invention.

• Herstellen eines Ventilkörpers mit einem Ventileinlass, einem Ventilauslass und einem Innenraum, welcher eine erste Dichtfläche aufweist, in welcher der Ventilauslass mündet,
• Herstellen eines Regulierbauteils mit einer zweiten Dichtfläche, welche mit der ersten Dichtfläche einen Dichtsitz ausbilden kann, sowie einem Fluideinlass und einem Fluidauslass,
• Einsetzen des Regulierbauteils in den Innenraum des Ventilkörpers um eine Rotationachse rotierbar gelagert unter Ausbildung des Dichtsitzes,

wobei beim Herstellen des Ventilauslasses und/oder des Fluidauslasses die jeweilige Mittelachse von der Rotationsachse beabstandet ist. Ein erfindungsgemäßes Verfahren stellt insbesondere ein erfindungsgemäßes Regulierventil her. Dementsprechend bringt ein erfindungsgemäßes Verfahren die gleichen Vorteile mit sich, wie sie ausführlich mit Bezug auf ein erfindungsgemäßes Regulierventil erläutert worden sind.A further subject of the present invention is a method for the production of a regulating valve, comprising the following steps:

• Producing a valve body having a valve inlet, a valve outlet and an interior, which has a first sealing surface in which the valve outlet opens,
• Producing a regulating component having a second sealing surface, which can form a sealing seat with the first sealing surface, and a fluid inlet and a fluid outlet,
• Inserting the Regulierbauteils rotatably supported in the interior of the valve body about a rotation axis forming the sealing seat,

wherein when the valve outlet and / or the fluid outlet is formed, the respective central axis is spaced from the axis of rotation. In particular, a method according to the invention produces a regulating valve according to the invention. Accordingly, a method according to the invention entails the same advantages as have been explained in detail with reference to a regulating valve according to the invention.

Fig. 1

eine erste Ausführungsform eines erfindungsgemäßen Regulierventils im Querschnitt,

Fig. 2

der Ventilkörper der Ausführungsform gemäß Fig. 1,

Fig. 3

eine weitere Ausführungsform eines erfindungsgemäßen Regulierventils,

Fig. 4

eine Detailansicht hinsichtlich der Überschneidung der Mündungsflächen und

Fig. 5

die Ausführungsform der Fig. 3 in geschlossenem Zustand in Seitenansicht.

The present invention will be explained in more detail with reference to the accompanying drawing figures. The terms "left", "right", "top" and "bottom" used herein refer to an alignment of the drawing figures with normally readable reference numerals. They show schematically:

Fig. 1

A first embodiment of a regulating valve according to the invention in cross section,

Fig. 2

the valve body of the embodiment according to Fig. 1 .

Fig. 3

a further embodiment of a regulating valve according to the invention,

Fig. 4

a detailed view of the intersection of the mouth surfaces and

Fig. 5

the embodiment of the Fig. 3 in closed state in side view.

The Fig. 1 and 2 show a first embodiment of a regulating valve according to the invention. This has a valve body 20, wherein a Regulierbauteil 30 is received in the interior 26 of the valve body 20. Further, in the interior 26 of the valve body 20, a first sealing surface 28 is arranged in a conical manner. The Regulierbauteil 30 has in a tapered manner on its outer surface on a second sealing surface 32, which forms a sealing seat with the first sealing surface 28. In addition, a valve inlet 22 and a valve outlet 24 are provided in the valve body 20. Inside the Regulierbauteils 30, a fluid path 40 is formed via two bores, which is a fluidkommunizierende Connection between fluid inlet 42 and fluid outlet 44 provides.

Also is in Fig. 1 to recognize that an axis of rotation R is provided, which allows a rotation of the Regulierbauteils 30 relative to the valve body 20. Also depicted is the center axis M of the fluid outlet 44. In this embodiment of a regulating valve 10 according to the invention, the center axis M of the fluid outlet 44 is designed in a classical manner and accordingly intersects the axis of rotation R.

In Fig. 2 is shown how the effect of an inventive design of the regulating valve 10 is achieved. Here it can be seen at which position the valve outlet 24 is located. Also, the valve outlet 24 is formed as a bore formed substantially with a circular cross section, wherein the central axis M of the valve outlet 24 is spaced from the axis of rotation R. In other words, the valve outlet 24 has been mounted eccentrically on the valve body 20. As can be seen, in this way the intersection between the valve outlet 24 and the inner surface of the interior 26 of the valve body 20 creates an orifice contour and an orifice area which are significantly increased as compared to a centrally located bore of a valve outlet 24. This enlargement has an effect, in particular, on the angle section, based on the extension of the mouth area to an angle starting from the axis of rotation R.

When a regulating member 30 rotates within the interior 26 of the valve body 26 about its axis of rotation R, different overlapping areas will be created between the mouth area of the valve outlet 24 and the mouth area of the fluid outlet 44 set. These different area sizes accordingly generate different flow cross sections, so that different fluid behavior can be regulated.

The Fig. 3 to 5 show a further embodiment of an inventive design of the regulating valve 10. This is characterized in particular by the fact that a spring device 50 is provided which exerts a bias on the Regulierbauteil 30. Thus, a free travel in Fig. 3 upward possible, so that when applied overpressure from below at the set biasing force of the spring device 50, a lifting from the sealing seat of the Regulierbauteils 30 is possible. Thus, an annular gap can be released, which increases the flow cross-section abruptly and thus allows a reduction of the applied overpressure. Also clearly visible is that in this embodiment, an outer wall 34 of the Regulierbauteils 30 projects into the valve inlet 22 and is supported there. This serves for the centering or the rotational mounting of the regulating component 30.

In the embodiment according to Fig. 3 In addition, a fastening means 60 in the form of a union nut can be seen, which is equipped with a threading device 62. In addition, the Regulierbauteil 30 is axially fixed and at the same time set the biasing force of the spring device 50 via the threaded device 62.

In Fig. 4 a view is shown in the direction of the Ventilauslassöffnung the fluid outlet 44. Through this visual axis and the valve outlet 24 can be seen, so that here an overlap of the two mouth surfaces is shown. In a rotation about the rotation axis R of the regulating member 30, accordingly, this overlapping area changes.

In Fig. 5 is an external view of the regulating valve 10 of Fig. 3 and 4 shown here, where it is easy to see how the positioning of the valve outlet 24 is arranged eccentrically in the valve body 20.

The above explanation of the embodiments describes the present invention solely by way of examples. Of course, individual features of the embodiments, if technically feasible, can be combined freely with one another, without departing from the scope of the present invention.

LIST OF REFERENCE NUMBERS

10

regulating

20

valve body

22

valve inlet

24

valve outlet

26

inner space

28

first sealing surface

30

regulating member

32

second sealing surface

34

outer wall

44

fluid path

42

fluid inlet

44

fluid outlet

50

spring device

60

fastener

62

threaded device

M

central axis

R

axis of rotation

Claims (12)

A regulating valve (10) for regulating a hydraulic volume flow, comprising a valve body (20) having a valve inlet (22), a valve outlet (24) and an interior space (26), which has a first sealing surface (28) in which the valve outlet (24 ), characterized in that a regulating component (30) with a fluid inlet (42) and a fluid outlet (44) in the interior (26) of the valve body (20) about a rotational axis (R) is rotatably arranged, which has a second sealing surface (32 ), which forms a sealing seat with the first sealing surface (28) and in which the fluid outlet (44) opens, wherein the central axis (M) of the valve outlet (24) and / or the fluid outlet (44) from the rotation axis (R) spaced is. Regulating valve (10) according to claim 1, characterized in that a spring device (50) is provided, which acts on the regulating member (30) in the direction of the sealing seat with a spring force. Regulating valve (10) according to one of the preceding claims, characterized in that at least one fastening means (60) for the axial attachment of the regulating member (30) to the valve body (20) is provided. Regulating valve (10) according to one of the preceding claims, characterized in that the valve outlet (24) and / or the fluid outlet (44) are formed as a bore with a round or substantially circular cross-section. Regulating valve (10) according to one of the preceding claims, characterized in that a threaded device (62) is provided to bias the regulating member (30) with a biasing force. Regulating valve (10) according to one of the preceding claims, characterized in that, with respect to the axis of rotation (R), the mouth of the valve outlet (24) and the mouth of the fluid outlet (44) are at the same or substantially the same axial height , Regulating valve (10) according to one of the preceding claims, characterized in that the fluid inlet (42) parallel, in particular coaxial, with the axis of rotation (R) and has a larger diameter than the fluid outlet (44). Regulating valve (10) according to one of the preceding claims, characterized in that the regulating component (30) has an outer wall (34) which projects below the second sealing surface (32) at least in sections into the valve inlet (22). Regulating valve (10) according to one of the preceding claims, characterized in that the valve outlet (24) has a larger diameter than the fluid outlet (44). Door closer for a door, comprising at least one regulating valve (10) with the features of one of claims 1 to 9 for regulating the damping of at least part of the door movement. Method for the production of a regulating valve (10), comprising the following steps: - Producing a valve body (20) having a valve inlet (22), a valve outlet (24) and an interior space (26), which has a first sealing surface (28), in which the valve outlet (24) opens, - Producing a Regulierbauteils (30) having a second sealing surface (32) which can form a sealing seat with the first sealing surface (28), and a fluid inlet (42) and a fluid outlet (44), Inserting the regulating component (30) into the inner space (26) of the valve body (20) so as to be rotatably mounted about a rotation axis (R) to form the sealing seat,
characterized in that in forming the valve outlet (24) and / or the fluid outlet (44) the respective central axis (M) is spaced from the axis of rotation (R). A method according to claim 11, characterized in that thus a regulating valve (10) having the features of one of claims 1 to 9 is produced.

Images