DE2930348A1 - Servo operated mixing or stop valve - has upstream chamber divided by movable component, coupled to valve plug - Google Patents

Abstract

The servo-operated valve is particularly for use as a sanitary mixing and/or stop valve. Upstream of the valve is a chamber divided by a movable component, and whose sections are selectively supplied with a flow medium under control of a hand-operated regulator. The movable component is coupled to the valve plug. The movable component can be a piston (2) forming a sliding seal in the chamber (1), while the sections (3) of the latter each have inlet and discharge branches (4,5) controlled by a two-way hand-operated key valve (6). In the rest position the inlet for the medium is open and the outlet to atmosphere shut off. The piston is coupled by a rod (7) to a valve slide, shaped to give the desired water discharge or mixing ratio.

Description

Valve device

The invention relates to a valve device, in particular a sanitary one Mixing and / or shut-off valve, with a servo-actuating device.

The purpose of this facility is to operate sanitary fittings, which sometimes require considerable forces and / or actuation paths to facilitate. From DE-PS 22 56 659 a switching device on water fittings is known, in which manual operation is facilitated by the assignment of auxiliary pistons.

The device is designed so that the switching process from the auxiliary piston is triggered. A manually variable valve manipulated variable can be used with this facility cannot be achieved.

The invention is based on the object of a mixing valve and / or shut-off valve to create with an actuating device operated with the conveying medium, whose Manipulated variable can be determined by hand. This object is achieved according to the invention by the in the characterizing part of claim 1 specified features solved.

Further features of the invention are specified in claims 2 to 13 An embodiment of the invention is shown in sehemt-ce Weisc in the drawing and is described in more detail below. FIG. 1 shows the individual functional elements a sanitary mixer tap; Figure la a valve inlet disk in longitudinal section and top view; FIG. 1b shows a valve outlet disk in longitudinal section and top view; FIG. 2 shows a further exemplary embodiment of a two-way push-button valve in longitudinal section; Figure 3 is a graph to illustrate the operation of the Mixer tap.

The mixer tap shown in the drawing has connections to the cold and hot water supply network (not shown in the drawing) Mistake. The cold water is to a bore 91 and the hot water to a Bore 92 of an inlet disk 9 held in the valve housing is brought up. Upstream, in front of the inlet disk 9, there are also two inflow lines 4 from the cold water supply line 80 branched off for the actuating device. On the inlet disk 9 is a Flat slide 8 with correspondingly assigned passage openings 81,82 arigtilIERT, so that depending on the position of the flat slide 8 different amounts of cold and hot water The cold and / or hot water that has passed through is provided by a conical outlet opening 11 of a downstream on the flat slide 8 adjacent exit disk 10 collected and from here into the battery outlet ; not shown in the drawing).

The flat slide 8 has a piston rod 7 with a piston 2 connected in a chamber 1. The piston 2 is sealed on its jacket mounted displaceably in the wall of the chamber 1 and divides the chamber 1 into two sub-chambers 3. At the end faces of the sub-chambers 3 is the inflow line 4 introduced from the cold water supply line 80 and also a drain line 5 led out. In each pair of lines - inflow line 4 and outflow line 5 - a two-way push-button valve 6 is interposed, which is in its rest position the feed line 4 connected to the cold water supply line is opened and which keeps the discharge line 5, which is in communication with the atmosphere, shut off.

The two-way push-button valve 6 is essentially a sliding piston 12 each with a sealing cone 13 for the inflow line 4 and a sealing cone 13 formed for the drain line 5. The sealing cone 13 on the slide piston 12 are to be arranged in such a way that in the end position one line is blocked and one line is fully opened. To regain a certain rest position, namely barrier the drain line 5, the slide piston is in this position with the aid of a spring 14 rammed.

Alternatively, membrane valves can also be used as sensing or control elements 20 (see Figure 2) can be used. In this valve, the inflow line 4 and the drainage line 5 is each guided on one side of a membrane 21, wherein the membrane 21 acts as a valve member to the inflow openings in the valve housing.

D @ water pressure of the supply line 4 acts on the lower surface of the membrane 21 and presses it against the inlet opening arranged above the membrane the drain line 5 and blocks it. Perpendicular to the membrane 21 is in the Valve housing a displaceable plunger 22 held, with which the STembrane 21 after can be deflected below, so now the vertically below the membrane angeorcInete inflow opening blocks the inflow line 4 and the outflow line 5 is released. If the deflection is no longer maintained, so K mirs the valve automatically returns to the position shown in FIG.

In Figure 1, the mixer tap is shown in the closed position.

If the left two-way button valve 6 is now operated, the left Partial chamber 3 relieved of pressure via the drain line o and that in the opposite Right partial chamber 3 introduced pressure of the cold water supply line 80 causes a displacement of the piston 2 in the direction of the left sub-chamber 3, so that the over the piston rod 7 coupled bottle slide 8 is moved accordingly. Here The passage opening 81 then first arrives with its control cross-section in d Area of the inflow opening 91, so that initially a small amount of cold water before time unit passes through the outlet opening 11 in the outlet disc into the battery outlet. If the two-way touch valve 6 is now held in its control position by hand, then the flat slide 8 is controlled by the servo device on the two inlet and outlet disks 9 and 10 passed so that the mixing valve, according to the graph in Figure 3, supplies tap water.

The graphic representation according to FIG. 3 shows on the abscissa the Valve stroke length in millimeters and the temperature in degrees Celsius on the ordinate and flow rate in liters per minute.

By appropriate shaping and arrangement of the passage openings 81.82, depending on the valve lift, initially a proportional up to a Maximum increasing amount of cold water (see curve Q) can be drawn off and then through Supply of hot water and corresponding throttling of the cold water approximately proportional increasing mixed water temperature with the same Amount of water (see curve for t ') can be achieved.

By actuating the right two-way push-button valve 6, the flat slide 8 can be returned to its closed position.

Depending on the duration of operation of a two-way push-button valve 6, a corresponding slide position can be achieved. In contrast, both two-way push-button valves operated at the same time, no valve movement is generated. When the valve is moving a small amount of cold water is released into the atmosphere, e.g. into the outlet.

Due to the relatively large and easily manageable actuating forces advantageously the flat slide 8 and the inlet and outlet disk 9,10 be made oxide ceramic material.

Also, instead of the piston 2, with which the chamber 1 is divided, a membrane or the like can also be provided.

The valve design described above is used as a safety relay referred to because initially only cold water can flow out during the opening process and Warm water is not added until a later opening process, with the closing process First the warm water and, at the end of the process, the cold water as well will. However, the valve device can be used not only for mixing valves, but can also be designed, for example, as a nozzle for cold or hot water.

Claims (7)

ANS PRUCHE 1. Valve device, especially sanitary mixing and / or Shut-off valve with a servo-actuating device, characterized in that upstream of the valve, a chamber divided by a movable member is provided, the sub-chambers each via a manually operated control member are selectively acted upon by a conveying medium, wherein the movable member is connected to the valve actuator. 2. Valve device according to claim 1, characterized in that as a movable member, a piston mounted in a sealed, displaceable manner in the chamber (1) (2) and the two sub-chambers (3) each have an inflow and an outflow line (4,5) is guided via a manually operated two-way push-button valve (6), with in In the rest position, the inflow line (4) connected to the pumped medium is open and the discharge line (5) connected to the atmosphere is shut off and that the piston (2) is connected to a piston rod (7) with a valve slide is, on the corresponding to a desired water withdrawal and / or water mixing program Passage cross-sections are formed. 3. Valve device according to claim 2, characterized in that as a valve slide one with passage openings (81, 82) for the cold and hot water provided flat slide (8) is used, which is slidable between stationary is mounted in the valve housing discs, with one disc as an inlet disc (9) with inlet openings (91, 92) for cold and hot water and the other disk as an outlet disc (10) with an outlet opening (11) for the outflowing mixing, Warm or cold water is formed. 4. Valve device according to claim 3, characterized in that the flat slide (8), the inlet disk (9) and the outlet disk (10) Oxide ceramic material are made. 5. Valve device according to the response 1 to 4, characterized in that that a membrane or the like is provided as a movable member in the chamber (1) is. 6. Valve device according to claims 1 to 5, characterized in that that the two-way touch valve (6) essentially consists of a sliding piston (12) one sealing cone (t3) for the inflow line (4) and one for the outflow line (5), the sealing cone (13) on the sliding piston (12) being formed in this way are that in the end position one line is shut off and one is fully open is and which the slide piston with the help of a spring (14) in its rest position is returned. 7. Valve device according to claims 1 to 5, characterized in that that a diaphragm valve (20) is provided as a sensing and control element in each case which the inflow line (4) separated from the outflow line (5) by a membrane (21) with the inflow water pressure acting on the lower surface of the membrane (21) and thereby closes the drain line with the membrane (21) and that perpendicular to the Membrane (21) a manually operated plunger (22) for deflecting the membrane and thus to open the drain line 'S) and shut off the inflow line (4) is provided.