EP1881278A1 - Volume flow regulator - Google Patents

Abstract

Flow rate regulator has one of the bearings of the stopper, accessible from the outer side of the flow channel (1), is formed by a bearing element pushed in from the outer side of the flow channel by a recess. The bearing element is shorter than the diameter of the flow channel and forms only the storage of the stopper.

Description

The invention relates to a volumetric flow controller, in particular for air conditioning and ventilation systems, with a rotatably mounted inside a flow channel about a transversely oriented to the flow axis pivoting damper, wherein the control damper under the influence of an inflowing the control valve medium against a restoring force generated by a restoring force from the Open position in a closed position is pivotable and is zurückverschwenkt in decreasing flow through the restoring force back into the open position, and with a the open position of the control flap limiting stop, which is for changing the flowing in the open position of the control valve volume flow around a pivot axis extending through two bearings rotatably mounted on the flow channel and can be fixed by means of a fixing device in its orientation, wherein at least one bearing point from outside of the flow channel to the change ung the orientation of the stopper is accessible, wherein the pivot axis of the control flap is provided on the stop and wherein the restoring device connected to the stop, in particular attached to the stop.

From practice, such flow controllers are known in various designs. They work mechanically automatically, because the flow-related control valve torque is compensated by the restoring force, which is usually generated by a resetting designed as a spring. When changing the flow conditions, the pivot position of the control cap also changes, so that the volume flow is controlled automatically in the flow channel.

If the amount of volume flow flowing in the open position of the control flap is to be changed, the stop limiting the open position of the control flap must be changed in its orientation, so that the free remaining flow cross section is changed in the open position. As a disadvantage, it proves that the installation of such volumetric flow controller is complex and costly in so far.

The object of the invention is to provide a volume flow regulator, which is easier and faster to install and in case of damage, the flap and / or the stop can be swapped quickly (can).

This object is achieved in that at least one of the accessible from outside the flow channel bearing points of the stop is formed by an inserted from outside the flow channel through a recess bearing element, which is shorter than the diameter of the flow channel and forms only the bearing of the stop on this page ,

The stop can be supported by one or by two bearing element elements according to the invention. If only one Inventive bearing element is provided, one of the two bearings need not be accessible from the outside. The non-accessible from the outside bearing point, for example, consist of a recessed in the inner wall of the flow channel recess, which is arranged approximately opposite the recess for the other bearing point. In the recess of the attack engages, for example, with a shaft portion. The other bearing point is accessible from outside the flow channel and is formed by the bearing element according to the invention. Of course, both bearings can be accessible from the outside and be formed by a respective bearing element of the invention.

The restoring device can be connected to the stop, in particular be attached to the stop that the spring characteristic is substantially unchanged when pivoting the stop. As a restoring device, a leaf spring may be provided, one end of which cooperates with the stop and the other end with the control flap. The leaf spring may, preferably on the side facing away from the control flap, be attached to the stop. Of course, other embodiments of restoring devices, such as a tension spring, conceivable, one end of which cooperates with the stop and the other end with the control valve.

At least one bearing element can be formed laterally projecting with respect to the flow channel to the outside. This facilitates accessibility, for example, for the purpose of dismantling the bearing element. Of course, the bearing element can also be set back with respect to the outer contour of the flow channel.

At least one bearing element may be rotationally connected to the stop. Thus, for example, the bearing element on the end facing the stop have a slot with which the bearing element is laterally attached to the stop. Other embodiments that allow transmission of rotation, such. B. an angular design of the free end of the bearing element are of course conceivable.

If only a manual adjustment of the stop made is desired, may be provided on the protruding from the flow channel end of the bearing element, for example, a handwheel. When adjusting the motor suitable transmission components such. As a gear, be provided. By rotation of the bearing element, the stop can be changed in its orientation. If the bearing element is recessed relative to the outer contour of the flow channel, for example, the bearing element element frontally have a slot or a toothing, so that by means of a suitable tool twisting is possible.

At least one bearing element can be designed as a pin.

At least one pin may have a bushing at the end projecting into the interior of the flow channel. In such an embodiment, the stop, for example, a shaft, wherein the length of the shaft, for example, a metal shaft is less than the inner diameter of the flow channel. After inserting the unit from stop and control flap, the pins attached by the two recesses on the respective end of the shaft.

At the stop a bearing shell corresponding with the pin can be provided. This bearing shell may be provided on one side of the stop. Then the axis of rotation of the stop is provided to form a lever arm at a distance from the stop. Of course, the bearing shells can also be arranged so that the axis of rotation of the stop is within the general plane of the stop.

At least one pin may have a limit stop, in particular a limit stop formed as a collar, for limiting the insertion path of the pin into the recess.

To prevent a displacement of a pin from the mounting position in the longitudinal extent of this pin, the pin in question may have a cooperating with the flow channel securing device.

As a securing means may be at least partially, at least in some areas, cooperating with the inside of the flow channel projection provided. This projection engages after insertion of the pin in the recess, the inside of the flow channel, so that to release the pin counterforce must be overcome.

As a securing means, at least one pin in the region which is in contact with the inner edge of the recess in the mounting position, one the inner edge of the recess be provided at least partially receiving securing groove.

The bearing element may be formed of plastic. It is advisable if the bearing element is sufficiently flexible and / or heat-resistant. Of course, other suitable materials are conceivable.

The stop and / or the control flap can be made of plastic.

At the bearing element, a cooperating with the stop detent element, in particular designed as a detent projection locking element provided. This prevents inadvertent release of the relevant bearing element of the stop in the assembled state.

The volume flow regulator can be designed as a plug-in. In this case, it can be inserted into an on-site sewer section of an air-conditioning system.

The pivot axis of the control flap may lie in the axis of rotation of the stop, so that the control flap and the rotation axis are rotatable about the same axis. Of course, the pivot axis of the control flap and the axis of rotation of the stop can also be arranged at a distance from each other. It is obvious that the axle (s) need not be continuous, but can also consist of smaller axle sections.

The control flap can be attached to the stop by means of a rotation-enabling clip connection. Conceivable, for example, two formed on the control flap Clips, which have a certain excess compared to the stop side bearing. The stop can have, for example, a continuous shaft or a number of the number of clips corresponding number of shaft sections.

Each clip connection can be arranged in a part region protruding from the general plane, in particular channel-shaped, so that the pivot axis of the control flap lies in the general plane of the control flap.

The invention also relates to a method for mounting a volumetric flow controller according to the invention. The inventive method is characterized in that first the control flap is attached to the stop and then the stop with the control flap attached thereto is attached to the flow channel by means of at least one bearing element by the fact that each bearing element from the outside of the flow channel through the associated recess for rotatable attachment of the stop is inserted.

During assembly, the control flap can first be attached to the stop. This can for example be done at the factory, while the final assembly, for example, can only be carried out on site on the site. The unit consisting of control flap and stop is then introduced into the flow channel. Upon reaching the mounting position - if two bearing elements of the invention are provided - the two bearing elements of the invention are introduced from the outside through the respective recess for rotatable mounting of the stop.

If only one inventive bearing element is used during assembly, the bearing elements in question is preferably then led from the outside through the recess in question for rotatable mounting of the stop after the storage of the other bearing, which is not accessible, for example, has been made. The non-accessible from the outside bearing point, for example, consist of a recessed in the inner wall of the flow channel recess, which is arranged approximately opposite the recess for the other bearing point. In the recess of the attack engages, for example, with a shaft portion.

Fig. 1

eine schräge Draufsicht auf einen erfindungsgemäßen Gegenstand,

Fig. 2

eine Innenansicht des Gegenstandes nach Fig. 1,

Fig. 3

einen Schnitt durch den Gegenstand nach Fig. 2 in Richtung III - III,

Fig. 4

eine Draufsicht auf einen Anschlag mit zwei montierten Lagerstellenelementen,

Fig. 5

den Gegenstand nach Fig. 4 in einer schrägen Draufsicht mit noch nicht montierten Lagerstellenelementen,

Fig. 6

die Bereiche "X" und "Y" aus Fig. 4,

Fig. 7

das eine Lagerstellenelement mit angeformtem Handrad,

Fig. 8

das andere Lagerstellenelement,

Fig. 9

eine schräge Draufsicht auf einen Anschlag mit eingesetzter Welle zur Lagerung der Regelklappe,

Fig. 10

den Bereich "Z" aus Fig. 9,

Fig. 11

einen Schnitt in Richtung XII - XII durch den Gegenstand nach Fig. 12,

Fig. 12

eine andere Ansicht des Gegenstandes nach Fig. 9,

Fig. 13

eine schräge Draufsicht auf eine Regelklappe,

Fig. 14

den Anschlag und die Regelklappe vor der Montage,

Fig. 15

den Gegenstand nach Fig. 14 im montierten Zustand,

Fig. 16-18

eine andere Ausführungsform der Erfindung.

Embodiments of the invention illustrated in the drawings are explained below. Show it:

Fig. 1

an oblique top view of an article according to the invention,

Fig. 2

an interior view of the article of FIG. 1,

Fig. 3

a section through the article of FIG. 2 in the direction III - III,

Fig. 4

a top view of a stop with two mounted bearing elements,

Fig. 5

the article of Figure 4 in an oblique plan view with not yet mounted bearing elements,

Fig. 6

the areas "X" and "Y" of Fig. 4,

Fig. 7

the one bearing element with an integrally formed handwheel,

Fig. 8

the other bearing element,

Fig. 9

an oblique top view of a stop with inserted shaft for mounting the control valve,

Fig. 10

the area "Z" of Fig. 9,

Fig. 11

a section in the direction XII - XII through the article of FIG. 12,

Fig. 12

another view of the article of FIG. 9,

Fig. 13

an oblique top view of a control flap,

Fig. 14

the stop and the butterfly valve before assembly,

Fig. 15

the article of FIG. 14 in the mounted state,

Fig. 16-18

another embodiment of the invention.

In all figures the same reference numerals are used for identical or similar components.

In Fig. 1, a flow channel 1 with a in the interior about a transversely to the flow direction (arrow 2) aligned pivot axis 3 rotatably mounted control flap 4 is shown.

The control flap 4 is pivoted against a restoring force under the action of flow forces acting on the control flap 4 in the flow direction (arrow 2). The restoring force is generated by a restoring device, which is formed in the illustrated embodiments as a leaf spring 5.

In Fig. 3, the control valve 4 has been pivoted due to a flowing in the direction of arrow 2 flow against the restoring force generated by the leaf spring 5 already slightly from the open position to its closed position in the direction of arrow 6.

As shown in the figures, located on the downstream side of the control flap 4, a stop 7, which limits the open position of the control flap 4. The stopper 7 is rotatably mounted in the illustrated embodiments about an axis of rotation 8, wherein the axis of rotation 8 in the pivot axis 3 of the control flap 4 is located. The axis of rotation 8 and the pivot axis 3 are arranged approximately centrally with respect to the cross section of the flow channel 1.

In the illustrated embodiments, the leaf spring 5 is the end, for example by means of a fastening device 9, for example a clip or a screw on which the axis of rotation 8 of the stop 7 opposite end of the stop 7 attached. Other attachment options, such. As welding, etc., are quite possible.

As can be seen in particular from FIG. 9, the stop 7 has two bearing shells 10 which, in the illustrated embodiment, form a lever arm at a distance from the general extension of the stop 7 are provided. For reinforcement stiffening ribs 11 are still provided. Between the bearing shells 10 a continuous shaft 12 is provided, which serves for fastening the control flap 4 with the stopper 7.

This is shown in detail in FIGS. 13 to 15. Thus, the control flap 4 has two spaced apart clips 13, by means of which the control flap 4 is clipped onto the shaft 12 of the stopper 7 and due to an excess of the clips 13 is rotatably mounted on the shaft 12.

Both clip connection are arranged in a projecting from the general plane channel-shaped portion 14 of the control flap 4, so that the pivot axis 3 of the control flap 4 in the general level of the control flap 4 is located.

In the volume flow controllers shown in the figures, the stop 7 is supported by two bearing elements 15 according to the invention designed as pins. For this purpose, the flow channel 1 in the region of both bearing points on two recesses 16 through which the bearing elements 15 can be introduced from the outside. The bearing elements 15 have in the region of the stop 7 facing the end of a lateral flattening 17, which correspond to a corresponding flattening 18 in the stop side bearing shell 10, so that thus a transmission of rotation on the control valve 4 is possible.

As can be seen for example from FIG. 6, the bearing element 15 shown on the left in this illustration has an integrally formed handwheel 19. This allows a manual adjustment of the stop 7. Of course can also attack a suitable motor actuator on the handwheel 19.

As can be seen, for example, from FIG. 6, the bearing element 15 shown on the right in this illustration has a limiting stop designed as a collar 20 for limiting the insertion path of the bearing element 15 into the recess 16. In the other bearing element 15 prevents the handwheel 19 too far insertion.

Both bearing elements 15 each have a locking projection designed as a latching element 21 which engages in a corresponding stop-side recess 22. This prevents inadvertent release. To allow insertion, both bearing elements 15 have a slot 23 in the region of the end which is inserted into the stop 7.

For assembly, first, as shown in FIGS. 14 and 15, the control flap 4 is clipped onto the shaft 12 of the stop 7. Of course, there is no need for a continuous shaft 12. The stop 7 may in the region of the clips 13 also have only axle sections, for example in the form of tabs, with which the clips 13 of the control flap 4 correspond.

Subsequently, the stopper 7 is inserted together with the control flap 4 in the interior of the flow channel 1. Then, a bearing element 15 is inserted into the bearing shell 10 of the stop 7 through the one recess 16. The further bearing element 15 is inserted through the other recess 16 in the other bearing shell 10.

By rotation of the handwheel 19, the inclination of the stop 7 can be adjusted and fixed by means of a fixing device, not shown, which may be, for example, a screw.

To damp the control valve 4 due to sudden volume flow fluctuations within the flow channel 1, a bellows 24 is provided in the embodiments on the downstream side of the control cap 4, which is fixedly secured to the stopper 7. The bellows 24 has an inlet opening 25, which is provided in the region of the inflow side of the control flap 4.

FIGS. 16 to 18 show an embodiment in which the two control flap subregions subdivided by the pivot axis 3 are angled relative to one another. Depending on the degree of opening of the control flap 4, different free cross sections form above and below the pivot axis 3 in the flow channel 1. By the larger lower half ellipse of the control valve 4, which is shown in Fig. 16 below, there is a better response at low differential pressures. The better overview is shown in FIGS. 16 to 18, only the control valve 4 and not the other components, such. B. the stop 7, dergestellt.

Of course, other measures may be used instead of the lateral flattening 17, e.g. a configuration as a square, be provided to allow a transfer of rotation of the bearing element 15 on the stopper 7.

The volumetric flow controller can also be designed as a plug which is in a flow section of a climatic engineering Plant is introduced. In this case, no handwheel 19 is integrally formed on the one bearing element 15.

Claims (17)

Volume flow regulator, in particular for air conditioning and ventilation systems, with a inside a flow channel (1) about a transverse to the flow direction (arrow 2) aligned pivot axis (3) rotatably mounted control flap (4), wherein the control flap (4) under the action of a Regulating flap (4) flowing against a medium generated by a restoring force from the open position to a closed position is pivoted and is zurückverschwenkt at decreasing flow through the restoring force back to the open position, and with a the open position of the control flap (4) limiting stop (7 ), which is rotatably mounted on the flow channel (1) for changing the volume flow flowing in the open position of the control flap (4) about an axis of rotation (8) extending through two bearing points and can be fixed in its orientation by means of a fixing device, wherein at least one bearing point of outside the flow (1) for changing the orientation of the stop (7) is accessible, wherein the pivot axis (3) of the control flap (4) on the stop (7) is provided and wherein the restoring means connected to the stop (7), in particular on the Stop (7) is mounted, characterized in that at least one of the outside of the flow channel (1) accessible bearing points of the stop (7) by a from outside the flow channel (1) through a recess (16) inserted bearing element (15) is formed, which is shorter than the diameter of the flow channel (1) and forms only the storage of the stop (7) on this side. Volumetric flow regulator according to the preceding claim, characterized in that at least one bearing element (15) with respect to the flow channel (1) is formed laterally projecting outwardly. Volumetric flow regulator according to one of the preceding claims, characterized in that at least one bearing element (15) is connected to transmit rotation to the stop (7). Volume flow regulator according to one of the preceding claims, characterized in that at least one bearing element (15) is designed as a pin. Volumetric flow regulator according to one of the preceding claims, characterized in that at least one pin has a bushing on the end projecting into the interior of the flow channel (1). Volumetric flow regulator according to claims 4 or 5, characterized in that on the stop (7) a corresponding with the pin bearing shell (10) is provided. Volumetric flow regulator according to one of claims 4 to 6, characterized in that at least one pin has a limit stop, in particular as a collar (20) formed limit stop, for limiting the Einschiebweges the pin in the recess (16). Volumetric flow regulator according to one of claims 4 to 7, characterized in that to prevent a displacement of a pin from the mounting position in the longitudinal extent of this pin of the respective pin has a cooperating with the flow channel (1) securing means. Volume flow regulator according to the preceding claim, characterized in that as a securing means on at least one pin at least partially, with the inside of the flow channel (1) cooperating projection is provided. Volumetric flow regulator according to claims 8 or 9, characterized in that as securing means at least one pin in the region which is in the mounting position with the inner edge of the recess (16) in contact, a the inner edge of the recess (16) at least partially receiving securing groove provided is. Volume flow regulator according to one of the preceding claims, characterized in that the bearing element (15) is made of plastic. Volumetric flow regulator according to one of the preceding claims, characterized in that on the bearing element (15) with the stop (7) cooperating detent element (21), in particular designed as a detent projection locking element (21) is provided. Volumetric flow regulator according to one of the preceding claims, characterized in that the volume flow regulator is designed as a plug-in. Volume flow regulator according to one of the preceding claims, characterized in that the pivot axis (3) of the control flap (4) in the axis of rotation (8) of the stop (7). Volume flow regulator according to one of the preceding claims, characterized in that the control flap (4) by means of a rotation enabling clip connection to the stop (7) is attached. Volumetric flow regulator according to the preceding claim, characterized in that at least one clip connection in a protruding from the general plane, in particular channel-shaped, portion (14) is arranged, so that the pivot axis (3) of the control flap (4) in the general plane of Regulating flap (4) is located. Method for mounting a volumetric flow controller according to one of the preceding claims, characterized in that first the control flap (4) is attached to the stop (7) and then the stop (7) on the flow channel (1) by means of at least one bearing point element (15) therethrough is fastened, that each bearing element (15) from outside the flow channel (1) through its associated recess (16) for rotatable mounting of the stop (7) is inserted.

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