DE29617099U1 - Flap valve - Google Patents

Description

Flap valve

The invention relates to a flap valve in the form of a shut-off flap as a check valve with a positive actuation device, by means of which the shut-off flap can be locked in the closed position as well as in intermediate positions and in the maximum open position, wherein two half-discs, which form the flap, are mounted in the flap housing and can be pivoted against spring force from the closed position into the open position.

The state of the art includes so-called check valves for installation in water, oil, steam, gas pipes or similar. There are also design options available with which the

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Half-discs that form the flap can be locked in the closed position or can be forced into the open position between 0 and 90°. In this way, it is possible to either safely shut off the pipe section equipped with the flap valve if, for example, the flow is undesirable due to installation work, or it is also possible to maintain a regulated flow that is less than the maximum flow and finally it is also possible, for example to empty the pipe section, to open the flap valve and allow the flow to pass through in the opposite direction to the actual flow direction so that a corresponding pipe system can be emptied.

The structural means known in the state of the art are complex to construct and difficult to handle.

Based on this state of the art, the invention is based on the object of providing a flap valve

to create a device of the type described above which is extremely easy to operate despite its simple construction.

To solve this problem, it is proposed that the half-discs are mounted on a shaft that passes through the housing transversely and centrally so that they can pivot freely in opposite directions, that the shaft consists of two coaxially directed shaft stubs that are not connected to one another and that emerge radially from the housing and have means for opposing rotation at the exit area, that each shaft stub has a stop means and each half-disc has stop surfaces or projections that interact with it, by means of which parts the pivoting path of the half-disc can be released from the closed position by 90 ° to the flow position or can be limited to an angle between 0 and 90 ° or by means of which the half-disc can be forced to pivot from the closed position into a partial or complete open position or can be blocked in the closed position, whereby the shaft stubs are preferably secured against

Rotation can be locked or fixed with a latch.

This solution is structurally simple to implement, since on the one hand the half disks are pivotably mounted on the shaft stubs and on the other hand the shaft stubs are equipped with stop means and the half disks with corresponding stop surfaces, so that by rotating the shaft stubs relative to the freely movable half disks on them, they can be adjusted accordingly.

The operation can be carried out easily from the outside by turning the ends of the shaft stubs that emerge radially from the housing according to the desired function. For this purpose, manual or pneumatic or hydraulic or electromotive actuators can be arranged on the shaft stubs, by means of which the rotation of the shaft stubs can be effected.

Especially when manually operating the shaft

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In the silent mode, the relative rotational position of the shaft stub can be locked or latched, for which purpose a corresponding handle can be provided at the free end of the shaft stub (on the outside), which has latching means, or also has locking means that interact with corresponding countermeasures on the housing.

It is preferably provided that on the back of the surfaces of the half-discs that are acted upon in the normal flow direction, bearing eyes are formed on these, through which the shaft stubs pass, that each shaft stump has a bolt that crosses the shaft stub in the middle as a stop means and that protrudes further from one side of the shaft stub than from the other side, that on the back of each half-disc a projection protrudes as a stop projection, against which the longer end of the bolt can be placed in the closed position of the half-disc by rotating the shaft stub or that, when the bolt and half-disc are in the flow position, on the longer end of the bolt

and that on the back of the half-disc there is formed a stop surface, in particular an eccentric surface, rising from the edge facing the other half-disc to the outer edge, against which the short end of the bolt can be placed by rotating the shaft stub for the purpose of forcibly opening the half-disc.

In this way, a compact structure is achieved that is easy to manufacture and assemble and that also functions over the long term.

In order to facilitate the synchronous operation of both half-discs, whereby the synchronous operation can be carried out manually or with mechanical aids, it is provided that an adjusting ring is mounted on the housing so that it can rotate to a limited extent, into which an adjusting finger protruding from the shaft stubs in a parallel axis engages, whereby the engagement is made possible by a

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directed elongated hole is formed.

An embodiment of the invention is shown in the drawing and described in more detail below.

It shows:

Figure 1 a flap valve with unlocked half flaps in the closed position, seen in cross section;

Figure 2 also seen in a view against the main flow direction;

Figure 3 the flap valve in the open position, opened solely by the flow;

Figure 4 shows the flap valve in the closed position according to Figure 1, whereby the closed position is, however, locked;

Figure 5 the flap valve in the representation

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according to Figure 1 with partially forced-open half-discs;

Figure 6 the same with more open half-discs;

Figure 7 shows a view of the flap valve in the area of the valve-penetrating shaft;

Figure 8 shows the flap valve with adjusting ring in view.

The flap valve shown in the drawing is a butterfly valve designed as a check valve with a forced actuation device. Using the forced actuation device, the butterfly valve can be locked in the closed position as well as in intermediate positions and in the maximum open position, whereby two half-discs 2, which form the flap, are mounted in the flap housing 1 and are moved from the closed position against spring force.

Position according to Figure 1 into the open position, for example according to Figure 3. The main flow direction is indicated at 23.

According to the invention, the half disks 2 are mounted on a shaft that passes through the middle of the housing 1 so that they can pivot freely in opposite directions, whereby the shaft consists of two coaxially directed, unconnected shaft stubs 3, 4 that emerge radially from the housing and have means 6 in the exit area 5 for rotating the shaft stubs 3, 4 in opposite directions. In the embodiment, the means 6 are formed by L-shaped angled bolts, which are fixed to the end of the shaft stubs 3 and 4 with one end, passing through them, and with their other, free end protruding coaxially to the shaft stubs as a handle.

Each shaft stub 3,4 has a stop 7 and each half-disk 2 interacting with it

Stop surfaces 9 or stop projections 8, by means of which parts the pivoting path of the half-discs 2 can be released from the closed position by 90 ° to the flow position or is limited to an angle between 0 and 90 ° or by means of which the half-disc 2 can be forced to pivot from the closed position into a partial or complete opening position or can be blocked in the closed position. Preferably, the shaft stubs 3, 4 can be locked or latched in any relative position against rotation.

In the exemplary embodiment, the arrangement of bearing eyes 10 of the half-disks 2 is provided on the back of the surfaces of the half-disks 2 that are acted upon in the normal flow direction 23, so that they are clearly guided. The bearing eyes 10 are penetrated by the shaft stubs 3, 4. Each shaft stubs 3, 4 has a bolt as a stop means 7 that crosses the respective shaft stubs 3 or 4 in the middle and protrudes further from one side of the shaft stubs 3 or 4 than from

the other side. On the back of each half-disk 2, a projection 8 is provided as a stop projection against which the longer end of the bolt (7) can be placed in the closed position of the half-disk 2 by rotating the shaft stub 3 or 4 or which rests against the longer end of the bolt (7) when the bolt (7) is in the closed position, as can be seen from Figure 1, for example, and the half-disk 2 is correspondingly open, as can be seen from Figure 3.

On the back of the half-disk 2, a stop surface or eccentric surface is provided which rises from the edge facing the other half-disk 2 to the outer edge (stop surface 9) against which the short end of the bolt (7) can be placed by rotating the shaft stub 3 or 4 for the purpose of forcibly opening the half-disk 2. With increasing rotation of the respective shaft stub 3 or 4, the corresponding half-disk 2 is forcibly opened to a greater or lesser extent.

As illustrated in particular in Figure 8, an adjusting ring 11 is mounted on the housing 1 in a manner that can rotate to a limited extent, into which an adjusting finger 12 protruding from the shaft stubs 3, 4 engages. The engagement is formed by an elongated hole 14 directed transversely to the direction of rotation of the adjusting ring (indicated by the arrow 13) and parallel to the flow direction 23 of the flap valve. This makes it possible to operate both shaft stubs 3, 4 synchronously in opposite directions by rotating the adjusting ring 11, with their adjusting fingers 12 engaging in the corresponding elongated holes 14 and, depending on the rotation, causing the corresponding shaft stub 3 to rotate in one direction or the other. This is illustrated in Figure 8 by dashed lines.

The function of the flap valve is as follows. In the illustration according to Figures 1 to 3, the shaft stubs 3,4 are rotated so that the bolt serving as a stop 7 is parallel to the flow direction 23 and not aligned with

Stop surfaces or stop projections of the half-discs 2. When there is flow in the direction of the flow arrow, the half-discs 2 are forced from the closed position according to Figure 1 into the open position according to Figure 3, whereby these movements are counter to the force of a return spring, which is not shown in the drawing.

If, for example, the flow through the flap valve is to be blocked for repair purposes of the installation system, the half shafts 3, 4 are each rotated by 45 ° in opposite directions, so that the position according to Figure 4 is established. The bolts serving as stop means 7 are placed on the projections 8 of the half disks 2 at the back, so that the half disks 2 cannot be opened by the flow in accordance with the flow direction arrow.

In the position according to Figure 5 and increasingly according to Figure 6, the shaft stubs 3,4 are turned in the opposite direction to that shown in the

Comparison of Figure 1 and Figure 4 can be seen. This results in a forced opening of the half-discs 2 to allow a flow to pass through, whereby depending on the rotation of the shaft stubs 3, 4, only a slight or a greater forced opening of the flap valve occurs. This enables a regulated flow. Such a position is also helpful if, for example, the pipe system is to be emptied against the actual flow direction.

In the drawing figure 7, the half shafts are shown with the corresponding elements and their bearing and sealing in the housing 1. The adjusting ring is also visible there, which is shown again in view in figure 8. The adjusting ring 11 is forced in the direction of rotation via a slotted hole guide 15. According to the movement arrow 13, the shaft stubs 3, 4 can be rotated (in opposite directions) into the forced opening position or into the forced closing position, whereby in the drawing the forced opening position is the upward-facing

arrow, while the downward arrow is the forced closing position.

The invention is not limited to the embodiment, but is variable in many ways within the scope of the disclosure.

All new individual and combination features disclosed in the description and/or drawing are considered essential to the invention.

Claims (3)

Protection claims: 1. Flap valve in the form of a shut-off flap as a check flap with a positive actuation device, by means of which the shut-off flap can be locked in the closed position as well as in intermediate positions and in the maximum open position, wherein two half-disks which form the flap are mounted in the flap housing and can be pivoted from the closed position into the open position against spring force, characterized in that the half-disks (2) are mounted on a shaft which passes through the housing (1) transversely and centrally and can be freely pivoted in opposite directions, that the shaft consists of two coaxially directed, unconnected shaft stubs (3, 4) which emerge radially from the housing (1) and have means (6) for opposite rotation at the exit area (5), that each shaft stub (3, 4) has a stop means (7) and each half-disk (2) has stop surfaces (9) which interact with it. or projections (8), by means of which parts the pivoting path of the half-disc (2) can be released from the closed position by 90° to the flow position or can be limited to an angle between 0° and 90° or by means of which the half-disc (2) can be forcibly pivoted from the closed position into a partially or completely open position or can be blocked in the closed position, wherein preferably the shaft stubs (3, 4) can be locked or latched in any position against rotation. 2. Flap valve according to claim 1, characterized in that on the rear side of the surfaces of the half-disks (2) which are abutted in the normal flow direction (23), bearing eyes (10) are formed on these, through which the shaft stubs (3,4) pass, that each shaft stubs (3,4) has a bolt as a stop means (7) which crosses the shaft stubs (3,4) in the middle and which projects further from one side of the shaft stubs (3,4) than from the other side, that on the rear sides each half-disk (2) has a projection protruding as a stop projection (8) against which the longer end of the bolt can be placed in the closed position of the half-disk (2) by rotating the shaft stub (3,4) or which rests on the longer end of the bolt when the bolt and half-disk (2) are in the flow position, and that on the back of the half-disk (2) a stop surface (9), in particular an eccentric surface, is formed which rises from the edge facing the other half-disk (2) to the outer edge, against which the short end of the bolt can be placed by rotating the shaft stub (3,4) for the purpose of forcibly opening the half-disk (2). 3. Flap valve according to claim 1 or 2, characterized in that an adjusting ring (11) is mounted on the housing (1) for limited rotation, into which an adjusting finger (12) protruding from the shaft stubs (3, 4) in a manner parallel to the axis engages, the engagement being achieved by a transversely to the Rotation direction (13) of the adjusting ring (11) and parallel to the flow direction (23) of the flap valve a slot (14) is formed.