ES2470981T3 - Drain valve equipment for a discharge tank - Google Patents

Abstract

Drain valve equipment for a cistern, which includes a drain valve (2), an overflow pipe (21) with a drain valve closure member (210) and an actuator (23) with a lifting device (22) to open the drain valve (2), a check device (25) controlled by a float (2510) being provided to keep the drain valve (2) open during the emptying process and a control shaft ( 250), the lifting device (22) being supported in the opening process on an outer support surface (212) of the overflow tube (21) and acting in parallel to the lever (2501, 2502), of which there is at least one , of the control shaft (250) for locking and unlocking a clamping appendix (2512) of the retention device (25) in the overflow tube (21) in the open position of the drain valve (2), characterized in that the lifting device (22) is formed by a plunger (220), which is supported by parallel to the overflow tube (21) such that it can slide limitedly in a valve housing (20) of the drain valve (2), the piston (220) having on its cover surface a shoulder (2200), which acts on the lever (2501, 2502), of which there is at least one.

Description

The invention relates to a drain valve equipment for a discharge cistern according to the preamble of claim 1.

A drain valve equipment is known from DE 197 48 621 A1. In this drain valve equipment, the lifting device acts inside the overflow pipe, a control system, consisting of relatively many parts, being provided to perform a partial discharge process or a complete discharge process.

Document FR 2 594 866 A1 describes a mechanical drive device for a cistern that enables different kinds of discharge. This document discloses the features of the preamble of claim 1.

Finally, EP 0 010 945 B1 is known as a drive device with a float that, using effects of ascending thrust and friction, allows partial or complete discharges.

The invention has as a basic task to continue improving the drain valve equipment indicated in the preamble of claim 1 and in particular improving the drain valve equipment such that few individual parts are needed. At the same time it is included in the task to configure the drain valve equipment so that it is versatile.

This task is solved with a generic type drain valve equipment by claim 1.

Other improved configurations of the invention are indicated in claims 2 to 19.

With the proposed measures, the drain valve can be greatly simplified. By actuating the lifting device on an external support surface, the drain valve can be operated mechanically, for example with a rod or a Bowden handle, hydraulically, for example with the water medium, or preferably pneumatically, for example With half air. Then, the interlocking and unlocking of the clamping appendix can be carried out essentially by means of a drive shaft connected to the lifting device.

In another improved configuration of the invention, the lifting device may conveniently be formed by a piston disposed in the drain valve housing such that it can slide axially to a limited extent, which on the one hand interacts on the front with the outer surface. of support of the overflow tube and on the other hand it interacts with a projection configured in its cover surface at least with a lever configured in the axis of control for the retention device. For example, a bellows can be arranged in the piston, with which the piston can move axially in the valve housing by moving in or withdrawing a fluid.

Advantageously, the retention device can be formed essentially by a rotating flap, which is attached with a lateral axis of rotation to the valve housing, a float being arranged on the side of the flap opposite the axis of rotation. that the ascending thrust of the float rotates the flap so much that a clamping appendix formed in the flap is placed under a retaining appendage of the overflow tube. But the swinging movement of the flapper is controlled by a retaining arm arranged on the drive shaft such that shortly before the end of the maximum travel path of the plunger the projection contacts the lever of the drive shaft and during the rest the control axis rotates the drive shaft with the retention arm such that the retention arm rotates away from a support surface of the flap and the flap rotates inwards due to the ascending thrust of the float with the clamping attachment under the overflow tube retention boss and thereby ensures the opening position of the drain valve. As soon as the water level is in the area of the float, the upward thrust is lower and due to the weight of the float, etc. Turn the flap with the retention boss from the position below the retention boss, so that the overflow tube falls back with the drain valve closing member in the drain valve closing position. Here the drive shaft is conveniently configured so that it rotates back by means of the force of gravity in the direction of rotation in which the retention arm reaches the bearing surface, thereby ensuring that in the closing position of The drain valve the control shaft brings the retention arm back to the support surface and the tank can be filled with water for the discharge of a new discharge process.

According to a preferred configuration of the invention, a second lever is additionally configured on the first lever on the drive shaft, both levers being arranged at approximately right angles to each other. In addition, a recoil arm is arranged at an acute angle with respect to the retention arm. Both levers then interacted with the protrusion of the plunger, while the retention arm and the recoil arm interacted with the flap. In the acute angle between the retention arm and the recoil arm, a leaf spring is also provided parallel to the retention arm, which is attached on one side to the drive shaft, which interacts with a special clamp shoulder. . In the process of opening the drain valve, the control shaft rotates in the final phase by means of the projection through the first lever until the retention arm rotates away from the support surface and the leaf spring rests on the retention shoulder. When the piston slides back to the rest position, its projection comes into contact with the second lever of the drive shaft, such that the drive shaft, supported by the leaf spring, rotates back slightly past the shoulder. then it is brought back by the leaf spring to the initial position. If, after the piston is lowered to its rest position, while the locking flap remains in its retention position, the piston is deflected, then the piston shoulder reaches the second lever of the drive shaft, with which is then further rotated by the drive shaft and the recoil arm, by means of a support surface, pulls out the flap with the clamping appendix, against the ascending thrust of the float, under the retention shoulder and The overflow pipe is released with the drain valve closure member, whereby the drain valve can then be blocked, thereby interrupting the discharge process. Upon reaching the blocking position of the overflow tube, a safety rib configured in the area of the support surface reaches the rear area of the clamping arm, whereby the control shaft rotates the leaf spring back on the retention shoulder, whereby the support arm reaches the retention surface again and the drain valve is prepared for a new discharge process.

According to another improved configuration of the invention, at least one float is arranged in the overflow tube. Then the piston can optionally, by means of the lifting device, reach a maximum only to rest on the projection on the first lever of the drive shaft, so that after the drain valve is opened, the overflow pipe is secured with the closing element of the drain valve through the float in the open position until, after evacuating a fraction of the discharge water, the water level has dropped in the tank such that the drain valve reaches the closed position again. With this configuration a fraction of the accumulated discharge water in the tank can be discharged at choice. When a fraction of the discharge water is discharged, the retention device remains disconnected.

In another improved configuration of the invention the float can be fixed to the overflow tube preferably such that it can be adjusted in height, whereby the fraction of discharge water can be adjusted by sliding the float over the overflow tube.

In another preferred configuration of the invention, the overflow tube can have a larger diameter end piece above the support surface, such that this end piece can additionally act as a float. Here, guide rails, to which the float is attached so that it can be adjusted for height, can be conveniently configured on the cover surface of the end piece. In this regard, a rack bar can be additionally formed on the cover surface, for a finely staggered movement, in which the float can be locked in each case in the desired position in terms of height.

In another improved configuration of the invention, the piston and the flap can be conveniently arranged in respective separate chambers in the valve housing, the drive shaft interacting on one side by means of both levers with the plunger, while on the other hand the arm of clamping, the leaf spring and the recoil arm are arranged in the other end zone in the flap chamber. The drive shaft can then be supported by bearings in the valve housing, the bearings being preferably configured such that the drive shaft can fit radially. In this regard, the drive shaft with the levers, the recoil arm and the clamping arm with the single-piece sheet spring made of plastic is advantageously manufactured.

In another improved configuration of the invention, the chamber for the flap can be conveniently configured as a water chamber open from above, which in the lower area has a throttle opening for a delayed water outlet, whereby during the discharge process the water level falls in the chamber more slowly than in the cistern, which makes it possible to empty the tank completely.

Conveniently, bearings can also be configured in a wall of the chamber, in which the flap can be fitted radially on the axis of rotation. In addition, the flap can be advantageously manufactured with the attachment axis of the pivot shaft and the single-piece plastic float.

In another improved configuration of the invention, a water accumulator open from above can be formed on the opposite side of the float flap. The water in the water tank acts as an additional torque on the flap, once the water has flowed out of the chamber in which the flap is arranged.

An exemplary embodiment of the invention is represented in the drawing and will be described in more detail below. It is shown in the drawing

Figure 1 a part of a cistern with a drain valve and a drive device in

resting position, partially in section, figure 2 the drain valve shown in figure 1 in the cutting plane II, figure 3 a part III shown in figure 1 of the drain valve in enlarged representation, figure 4 the cistern shown in figure 1, opening the drain valve for a discharge

complete, figure 5 a part V shown in figure 4 of the drain valve, the drain valve being held fully open and by a retention device in the open position,

6 shows the part shown in figure 5 of the drain valve in a new actuation process, with a projection on the lifting device on the second lever of a control shaft,

figure 7 shows the part shown in figure 6 of the drain valve, the projection of the lifting device having continued to rotate the control shaft by means of the second lever, whereby a recoil arm retracts the locking device from the retention position in the overflow tube and thereby releases the drain valve for an early closure,

Figure 8 the tank shown in Figure 4, the discharge water from the tank having come out and the drain valve being again in the closed position, the control shaft having turned back through the safety ribs arranged in the tube overflow to the initial turning position,

figure 9 a part IX shown in figure 8 of the drain valve in enlarged representation, figure 10 the tank shown in figure 1, the lifting device being operated only along

an area of approx. 75%, figure 11 a part XI shown in figure 10 of the drain valve in an enlarged representation, figure 12 the tank shown in figure 10 with a retracted lifting device, figure 13 the overflow pipe shown in figure 1 with closing element of the drain valve in

perspective view, figure 14 the overflow tube shown in figure 13 in side view, figure 15 the overflow tube shown in figure 14 in top view, figure 16 the piston of the lifting device shown in figure 1 in perspective view, figure 17 the piston shown in figure 16 in side view, figure 18 the piston shown in figure 17 in top view, figure 19 the drive shaft shown in figure 2 in perspective view, figure 20 the drive shaft shown in figure 19 in side view, figure 21 the drive shaft shown in figure 20 rotated in 90�, figure 22 the flap shown in figure 1 of the retention device in perspective view, figure 23 the flap shown in figure 22 in side view and figure 24 the flap shown in figure 23 in view from above.

In the exemplary embodiment shown in the drawing, a tank 1 with a bottom 10 and a cover 11 is partially shown. At the bottom 10 a drain valve 2 with an overflow tube 21 and a closing element of the drain valve 210 configured in the overflow pipe 21. The bottom opening 10 of the tank 1 is followed by a drain pipe 13 for the discharge water. Tank 1 is then filled with water for discharge to water level 12 by means of an inlet valve not shown in the drawing and controlled by the float. The drain valve 2 is in the closed position. The drain valve 2 has a valve housing 20, in which a lifting device 22 and a retention device 25 are provided. The lifting device 22 is connected by a fluid pipe 24 with an actuating device 23.

Next to the drive device 23 is provided a bellows 230, the drive device 23 being provided with a first push button 231 for a complete unloading process and a second push button 232 for a partial unloading process. With the first button 231 the user can compress the bellows 230 completely, while with the second push button 232 the bellows 230 can only be compressed by approximately 75%. The lifting device 22 is arranged with a piston 220 in a chamber 200 of the valve housing 20, a bellows 221 being fixed on one side to the valve housing 20 and on the other hand to a separating wall 2201 of the piston 220 The bellows 221 is connected in the area of the housing with the fluid pipe 24, whereby when the bellows 230 of the drive device 23 is compressed, the corresponding expansion of the bellows 221 is originated and thereby an axial displacement of the piston 220 in the chamber 200. The piston 220 interacts on its front side with a bearing surface 212 of the overflow tube 21. In addition, a radial projection 2200 is configured on the surface of the plunger cover 220, which interacts with the levers 2501, 2502 of a drive shaft 250.

The drive shaft 250 supports both levers 2501, 2502 configured in an end zone offset from each other in about 90�, as well as in the other end zone a clamping arm 2503 and a recoil arm 2505 formed forming an acute angle with the clamping arm 2503. At the acute angle between the recoil arm 2505 and the clamping arm 2503, a leaf spring 2504 is formed parallel to the clamping arm 2503 with an end zone on the control shaft 250. The arm clamping 2503, the leaf spring 2504 and the recoil arm 2505 interact with a flap 251 of the retention device 25 disposed in a chamber 201 of the valve housing 20. The control shaft 250 is then arranged on bearings 202 of the valve housing 20. The bearings 202 are configured here such that the drive shaft 250 can fit radially in the bearing 202. The drive shaft 250 with the levers 2501, 2502, the clamping arm 25 03, the leaf spring 2504 and the recoil arm 2505 are made of a single piece of plastic by the injection molding process.

The flap 251 of the retention device 25 supports, on the one hand, an axis of rotation 2511 protruding from the flap 251, with which it can radially snap into the bearing 2010 of the valve housing 20 and is supported such That can turn. In the flap 251 there is also a clamping appendix 2512, which interacts with a retaining shoulder 211 of the overflow tube 21.

A float 2510 is formed on the side of the flap 251 opposite the axis of rotation 2511, as can be seen in particular in Figures 22 and 23 of the drawing. On the outer face of the float 2510 a water accumulator 2516 is also configured. On the flap 251, a support surface 2513 for the clamping arm 2503 is formed in the area of the water accumulator 2516. � formed a retention shoulder 2514 for the leaf spring 2504 and a support surface 2515 for the recoil arm 2505 on one side of the water tank 2516. The flap 251 with the float 2510, the rotation shaft 2511 and The attachment appendix 2512, as well as the water accumulator 2516 and the support surface 2513, retaining shoulder 2514 and the support surface 2515, are made of a single piece of plastic by the injection molding process.

The overflow tube 21 is provided with a terminal part 214 of greater diameter above the bearing surface 212, as can be seen in Figures 1 and 13 to 15 of the drawing. An extension 215 can also be inserted on the terminal part 21. In the outer cover of the terminal part 214 two guide rails 2140 are configured parallel to the central axis, one of which houses a float 213 and is arranged such that It can partially slide with respect to the end piece 214. For the interlocking in the different axial positions, a rack bar 2141 is also formed on the surface of the cover of the end piece 214. In the area of the bearing surface 212 of the overflow tube 21, security ribs 2120 are also configured, which in the closing position of the drain valve 2 ensure the return of the control shaft 250, whereby the control shaft 250 assumes the necessary rotation position to start a process Download

The drain valve equipment described above works as follows:

When the user presses the first button 231 from the position shown in figure 1 of the drawing, in which the tank is filled to level 12 with water for discharge, the bellows 230 is completely compressed, as can be seen in the Figure 4 of the drawing. The amount of fluid or amount of air displaced is conducted through the fluid line 24 to the bellows 221 of the lifting device 22. The bellows 221 expands due to it axially and thus moves the piston 220 with its front face next to the bearing surface 212 of the overflow tube 21 upwards, whereby the overflow tube 21 is lifted with the drain valve closure member 210 from the drain valve seat 2 and the discharge water flows out of the tank by a drain pipe 13 to rinse for example a WC. In the extreme area of the axial movement of the piston 220, the shoulder 2200 reaches the first lever 2501 of the drive shaft 250 and rotates the drive shaft 250 so much that the clamping arm 2503 rotates away from its bearing surface 2503 in the area of the water accumulator 2516, whereby the water found in the chamber 201 of the valve housing 20, with the help of the float 2510, rotates the flap 251 inwards with the attachment appendix 2512 under the retention shoulder 211 of the overflow tube 21, whereby the overflow tube 21 is interlocked with the drain valve closure member 210 in the open position, as can be seen in particular in Figure 5 of the drawing. Then the leaf spring 2504 arrives at the holding shoulder 2514.

After actuating the button 231, the bellows 230 is brought back from its compressed position by the force of the spring again to its rest position. Then the water level 12 in the tank 1 falls continuously, as can be seen in figure 8 of the drawing. The water in the chamber 201 flows with delay through a throttle opening not shown in the drawing to the return tank 1, whereby an almost complete emptying of the tank can be achieved. When the ascending thrust of the float 2510 yields, the flap 251 rotates back by its own weight and the weight of the water that is in the water accumulator 2516 whereby the clamping appendix 2512 retracts under the retaining shoulder 211. The Overflow tube 21 is thus released, whereby it falls back due to the force of gravity with the closing element of the drain valve 210 in the closed position. Then, the drive shaft 250 is rotated back by means of the safety rib 2120, whereby the leaf spring 2504 recoils by means of the retaining shoulder 2514 and the clamping arm 2503 rests again on the support surface 2513. Next The tank can be filled again by means of a float valve not shown in the drawing to a water level 12 shown in Figure 1.

But if, during the discharge of the discharge water from the tank 1, the button 231 is pressed again, then the projection 2200 arrives during the axial displacement of the piston 220 to the second lever 2502 of the control shaft 250, since the control shaft It is held by the leaf spring 2504 in this rotational position. Pressing again, as can be seen in particular in figures 6 and 7 of the drawing, rotates the drive shaft 250 further, whereby the recoil arm 2505 reaches the bearing surface 2515 and the flap 251 rotates back against the ascending force of the float 2510, turning the clamping appendix 2512 away from the retaining projection 211 of the overflow tube 21, whereby the overflow tube 21 is immediately released with the drain valve closure member 210 to block the drain valve 2. By pressing button 231 a second time, the user can interrupt the entire discharge. The torque applied by the force of gravity on the drive shaft 250 rotates the drive shaft 250 back after pressing a second time, causing the safety rib 2120 configured in the area of the bearing surface 212 the turn remainder of the drive shaft 250 to retract the leaf spring 2504 over the retaining switch 2514, such that the starting rotation position of the drive shaft 250 is again reached, in which the clamping arm 2503 rests on the support surface 2513, as shown in figure 1 of the drawing.

If, on the other hand, in tank 1 shown in figure 1, the user presses button 232, then only bellows 230 can be compressed in approx. 75% The amount of air displaced comes again through the fluid line 24 to the bellows 221 of the lifting device 22. Here it reaches the piston 220, due to the lower amount of air, a lower height and arrives at most with its projection 2200 until in the vicinity of the first lever 2501, without moving the drive shaft 250. However, the overflow tube 21 with the drain valve closure member 210 is here already in the opening position of the drain valve 2, being maintained the overflow tube by means of a float 213 in the open position. As soon as the water level 12 has lowered sufficiently in the tank 1, the drain valve 210 closing member returns to its closed position. Thus, by pressing button 232, a partial discharge amount can be assigned from tank 1.

The amount of partial discharge can be adjusted by the height or axial position of the float 213 in the end piece 214 of the overflow tube 21. Then fine adjustments can be made with the aid of a rack bar 2141, in which the float 213 can be interlocked in the different axial positions.

Claims (19)

one.

Drain valve equipment for a cistern, which includes a drain valve (2), an overflow pipe (21) with a drain valve closure member (210) and an actuator (23) with a lifting device (22) to open the drain valve (2), a check device (25) controlled by a float (2510) being provided to keep the drain valve (2) open during the emptying process and a control shaft ( 250), the lifting device (22) being supported in the opening process on an outer support surface (212) of the overflow tube (21) and acting in parallel to the lever (2501, 2502), of which there is at least one , of the control shaft (250) for locking and unlocking a clamping appendix (2512) of the retention device (25) in the overflow tube (21) in the open position of the drain valve (2), characterized in that the lifting device (22) is formed by a piston (220), which is supported in parallel to the overflow tube (21) such that it can slide limitedly in a valve housing (20) of the drain valve (2), the piston (220) having on its cover surface a shoulder (2200), acting on the lever (2501, 2502), of which there is at least one.

2.

Drain valve equipment according to claim 1, characterized in that the retention device (25) includes a flap (251) that can be rotated by means of a float (2510), which is secured with a lateral pivot shaft (2511) in the valve drain

(2) and which has a clamping appendix (2512), which by means of the ascending thrust of the float (2510) can rotate radially under a retaining shoulder (211) of the overflow tube (21), the turning movement can be blocked or released of the flap (251) by means of a clamping arm (2503) disposed on the drive shaft (250), which interacts with a support surface (2513) of the flap (251), depending on the turning position .

3.

Drain valve equipment according to claim 2, characterized in that the projection (2200) is placed in the piston (220) such that shortly before the end of the maximum travel path it contacts the lever (2501) of the drive shaft

(250) and rotates the support arm (2503) away from the support surface (2513).

Four.

Drain valve equipment according to at least one of claims 2 and 3, characterized in that the control shaft (250) is configured such that the force of gravity generates a torque in the direction of the rest position, in the that the clamping arm (2503) makes contact with the support surface (2513).

5.

 Drain valve according to at least one of claims 2-4, characterized in that in addition to the first lever (2501) a second lever (2502) is configured on the control shaft (250), both levers (2501, 2502) being arranged ) approximately at right angles to each other and a retractable arm (2505) being arranged at an acute angle with respect to the retention arm (2503), being configured at the acute angle parallel to the retention arm (2503) a leaf spring (2504), which with its extreme free zone interacts with a retaining shoulder (2514) of the flap (251), such that after the rotation of the drive shaft (250) made by means of the First lever (2501) the leaf spring (2504) rests on the retention shoulder (2514) and prevents a return turn, so that in a second axial movement of the plunger (220) the projection (2200) comes to take contact with the second lever (2502) and the drive shaft (250) with e The recoil arm (2505) by means of a support surface (2515) removes the flap (251) with the clamping appendix (2512) against the ascending thrust of the float (2510) under the retention shoulder (211) and with it early starts the closing movement of the drain valve (2), being provided in the overflow tube (21) means that during the closing process of the drain valve (2) act on the control shaft (250) such that the leaf spring (2504) is driven back onto the retention shoulder (2514) and the clamping arm (2503) is brought to the support surface (2513).

6.

Drain valve according to at least one of the preceding claims, characterized in that at least one float (213) and the plunger (220) can be moved at the most choice only until the protrusion of the overflow tube (21) (2200) rests on the lever (2501) of the drive shaft (250), so that after opening the drain valve (2) the overflow pipe (21) with the drain valve closing element ( 210) is maintained by the float

(213) in the opening position until, after leaving a fraction of discharge water, the water level (12) has dropped in the tank (1) so much that the drain valve (2) is closed again.

7.

Drain valve according to claim 6, characterized in that the float (213) is fixed to the overflow tube (21) such that it can be adjusted axially to determine the desired fraction of discharge water.

8.

Drain valve equipment according to at least one of the preceding claims,

characterized in that the overflow tube (21) is configured above the support surface (212) with a terminal part (214) of greater diameter, such that the terminal part (214) additionally acts as a float.

9.

Drain valve equipment according to claim 8, characterized in that guide rails (2140) are configured on the cover surface of the end piece (214), to which a float (213) is attached which can be adjusted in How tall

10.

 Drain valve equipment according to claim 9, characterized in that a rack bar (2141) is configured on the cover surface of the end piece (214), in which the float (213) is locked in terms of height.

eleven.

 Drain valve equipment according to at least one of the preceding claims, characterized in that the piston (220) and the flap (251) are arranged in respective chambers (200, 201) in the housing (20) of the drain valve (2), the lever (2501, 2502) being arranged in one of the terminal areas and the recoil arm (2505) and the clamping arm (2503) with the leaf spring (2504) in another end zone of the axis of drive (250) and the drive shaft (250) being supported by bearings (202) in the valve housing (20).

12.

 Drain valve equipment according to claim 11, characterized in that the bearings (202) are configured such that the drive shaft (250) can fit radially.

13.

 Drain valve equipment according to claims 2 and 5, characterized in that the control shaft (250) with the levers (2501, 2502), as well as the recoil arm (2505) and the clamping arm (2503) with the Reed spring (2504) are made of a single piece of plastic.

14.

 Drain valve equipment according to claims 2 and 11, characterized in that the chamber (201) for the flap (251) is configured as an open water chamber from above, which in the lower area has a throttle opening for an outlet of delayed water, so that during the discharge process the water level (12) drops in the chamber more slowly than in the tank.

fifteen.

 Drain valve equipment according to claims 2 and 11 or according to claim 14, characterized in that bearings (2010) are configured in a chamber wall (2010), in which the rotation axis (2511) can be radially fitted of the clapper (251).

16.

 Drain valve equipment according to at least one of claims 2-5 and 13-15, characterized in that the float (2510) is configured on the side of the flap (251) opposite to the axis of rotation (2511).

17.

 Drain valve equipment according to at least one of claims 2-5 and 13-16, characterized in that the flap (251) with the clamping appendix (2512), the pivot shaft (2511) and the float (2510) are �n configured of a single piece of plastic.

18.

 Drain valve equipment according to claims 2 and 11, characterized in that on the side of the float (2510) opposite to the flap (251) an open water chamber (2516) is configured, whose water additionally loads on one side on the clapper

(251) when the water has left the chamber (201).

19.

 Drain valve equipment according to at least one of claims 2-5 and 13-18, characterized in that safety ribs (2120) are formed vertically protruding from the support surface (212) on the support surface (212). , whose length is dimensioned such that when the drain valve (2) is closed, the clamping arm (2503) rests with its end area on the bearing surface (2513) and the flap (251) is rotated outward with the clamping appendix (2512) away from the retaining shoulder (211).