DE1796335C2 - Automatically switching flushing device for cleaning systems. Eliminated from: 1771168 - Google Patents

Description

len and an alkaline and an acidic cleaning solution shown.

solution alternating with water through the connection With 1 is the suds container and with 2 the acid layer to press. The alkaline and acidic solution containers are called. The solenoid valves 3 are housed in separate containers, and the and 4 are in the connection line between the alternating removal of water, lye, water, lye container 1 or the acid container 2 and the Acid, water is arranged according to a set time pro 55 suction line 5. The solenoid valve 6 is in gram controlled by a time switch. Since the alkaline water also leading to the suction line 5 and the acidic cleaning solution for several days line 7. From the reflux line 8 leads a used, they must after passing branch line 9, in which a solenoid valve 10 is built The system is returned to its container, to the tub 1 and another two-way the water is led down the drain. The 60 device 11, in which also an electrovalve 12 at the end the line is alternately ordered to the acid tank 2. The return line and to switch acid tanks by a device 8 is also with an upward extending valve provided in the relevant return line during the kenden elbow 13 as a water drain. Duration of the lye or acid flow is opened. All valves 3, 4, 6, 10 and 12 are in the de-energized state

If water appears at the end of the system, 65 state are closed.

Both valves are closed so that the water can be used to access the various cleaning solutions

a pipe bend that is always open, but located higher up, is controlled by a timer, not shown flows into the drain. works the valves 3, 4 and 6 according to a set one

The program is opened alternately and closed again after the set time has elapsed. The rinsing process runs every day according to the same program, and it is assumed that after a pre-wash the alkaline solution is first obtained with water.

In the return line 8, an electrical sensor 14 is installed insulated and sealed, which is connected in series with a SpaiKMingsquelle IS and a relay A. As a whole, this circuit represents the indicator that responds to conductivity. This indicator interacts with a timing relay B and a surge relay C.

The device works in the following way: As long as the return line 8 supplies used rinsing water, the indicator circuit 14-15-Λ is practically de-energized.

The valves 10 and 12 are closed and the water drains through the elbow 13 to the drain. As soon as the subsequent lye touches the sensor 14, a current begins to flow in the indicator circuit, which, when a certain value is reached, which depends on the conductivity of the rinsing liquid, causes relay A to respond closed contact b, the latching relay C, which switches the contact that is now connected to the solenoid valve 10. At the same time, the timing relay B was switched on, which has a short duration of z. B. 1 see is set to bridge the switching time of relay C. After the set time, it switches the contact b and thus the electrical voltage from the surge relay C via the voltage lead 16 to the valve 10. The relay C does not switch back when the contacts drop, so that the valve 10 opens and the lye in the Lye container 1 flows back

When relay Λ drops due to the lye being replaced by rinsing water, valve 10 is de-energized again and closes. The water flows to drain 13. When relay A is activated again by the acidic cleaning solution, the contacts switch to solenoid valve 12 in the same switching sequence, so that the acid flows back into the acid container 2

The electrical sensor 14 is preferably attached to the pipe 8 so that it can be withdrawn for inspection can be. It is also possible, instead of the voltage source 15 in the indicator circuit, to apply an external voltage to the remaining ones To switch switching elements.

The flushing device according to the invention also allows the use of valves which are open in the de-energized state. In this case the lines must be laid and the relay A provided with opening contacts so that the valves are permanently energized in the closed position and are de-energized when the indicator responds through an opening contact of the relay A.

1 sheet of drawings

Claims (1)

ι ^J 2 From the German patent specification 1212344 is ^ Patent claim: already known a device that thereby gekenn is that the return flow of the two cleaning Automatically switching flushing device for pouring liquids into the corresponding storage cleaning of systems for processing and regulating containers and the rinse water in the drain Handling of liquids under alternating valves can be preselected by a timer Use of water, alkaline and acidic actuation can be provided and the valves in cleaning solution, with no substantial dependence on the passage of current between per se Mixing the alkaline and acidic solution according to known, immersed in the liquid flow the passage through the system in their storage container io electrodes can be regulated. This device requires two in series. Sewer is fed, wherein in the orderly, responsive to conductivity and each built with a return line, on the conductivity of one of the two valves interacting indicator liquid responsive indicators over gates. When the current passes, both indicators in relays trigger the opening of solenoid valves. Of the two valves, however, each valve can be characterized in that only that which was provided by the time switch to the return line (8) for conductivity switching only can be opened,
appealing indicator (14-15-A) arranged The invention is based on the object of providing an in is that, when the current passes, a running time that is simpler in its structure and safe in its operation is short Set time relay (B) and simultaneously working, automatically switching flushing device A surge relay (C) switches on, of which the device is used to clean equipment for processing and the time relay (B) after the set treatment of liquids with alternating Runtime is the electrical voltage from electricity using water, alkaline and acidic rice push relays to create a switching solution on its changeover contact (c), with no essential tet, which, when the impulse relay (C) responds, mixes the alkaline and acidic solution the voltage supply line (16) alternates with the passage through the system in its storage container the solenoid valves (10, 12) are fed back into the return line and the water is drained (9, 11) connects and thereby the exchange channel is fed, whereby in the return rail way open the valves for the alkaline processing built-in, on the conductivity of the liquid or acidic cleaning solution causes. 30 responsive indicators via a relay that opens cause of solenoid valves. The flushing device according to the invention is thereby marked that in the return line only one indicator that responds to conductivity 35 net, which is short when the current passes through Runtime set time relay and on at the same time The invention relates to a flushing current impulse relay switches on, of which the time saving for cleaning systems for processing laisB after the set running time has elapsed or treatment of liquids under alternating electrical voltage from the impulse relay to its wise use of water, alkaline and acidic 40 switchover contact that switches when the rer cleaning solution, whereby the voltage supply line alternates without significant violating current impulse relays Mix the alkaline and acidic solution after using the solenoid valves in the return lines Passing through the system in its storage container connects and thereby the alternating opening of the are returned and the water to the sewage valves for the alkaline or acidic cleaning solution is supplied, causing 45 solution in the return line. built-in, instead of direct-switching solenoid valves based on the conductivity of the liquid Speaking indicators via a relay that can open but also indirectly switching pneumatic ones cause of solenoid valves. or hydraulic valves can be used. It is customary to flush such systems in a circuit. The drawing shows an embodiment of the