CZ10511U1 - Filling valve for WC tanks - Google Patents

Description

Inlet valve for toilet tanks

Technical field

The technical solution relates to an inlet valve for toilet tanks with a closing diaphragm operated hydraulically by means of a nozzle and a lever connected to a float.

BACKGROUND OF THE INVENTION

So far, a number of inlet valve designs for use in toilet tanks are known and manufactured. These inlet valves are usually divided into two basic groups according to the way of their control, namely float and floatless. Float-free valves are used less because they require a sufficiently high and constant water pressure, together with a relatively precise pipe diameter, to function properly and to achieve a corresponding flushing effect. The more extensive float valves are operated by a float that closes the valve opening through a lever. Typically, the diaphragm is built into a valve body provided with a plurality of holes and channels, and is subjected to water pressure from the water line through which it is lifted, allowing water to flow through the valve body into a tube from which it flows into the flush tank.

The diaphragm is also provided with a small overflow opening which allows water to flow into the space behind the diaphragm. The space behind the membrane is tightly closed by a cap with a nozzle to drain water flowing through the membrane into the space behind the membrane. The nozzle is supported by a lever operated by a float which closes the water supply when the tank is filled with water. This type of inlet valve is relatively simple. Its generally known disadvantage, however, is the limited possibility of regulating the level in the reservoir and also that the lever extends too much into the interior of the reservoir, which often prevents the use of more modern types of drain valves. These drawbacks partially eliminate the inlet valve design according to CZ utility model No. 6400 and CZ utility model No. 7934. However, the diaphragm that is a part of the valve according to CZ utility model No. 6400 is flat and flat at its lower part, bearing on the valve seat. closing the valve in the event of a sudden and abrupt contact of the entire diaphragm bottom surface on the inlet valve seat may cause a pressure surge in the inlet pipe, which is accompanied by an unpleasant intense noise. No. 7934 has non-parallel diaphragm seating and inlet valve faces, which is difficult to adjust and maintain the inlet valve.

The essence of the technical solution

Most of the drawbacks of the prior art toilet tank inlet valve solutions are overcome by a toilet tank inlet valve in which the flushing water flow is shut off by a diaphragm provided with a mandrel internally hydraulically actuated by a nozzle and shut-off lever connected to the float according to the present invention. that the bottom wall of the diaphragm abutting the inlet valve seat is a flat surface and that the tm located inside the diaphragm is in its lower part abutting the inner bottom surface of the diaphragm having a circular surface forming a low projection having a minimum diameter equal to the outer diameter of the inlet valve seat; the maximum diameter is equal to the outer diameter of the inlet valve seat, increased by 2 mm.

The inlet valve of the WC tanks according to this technical solution enables practically 100% tightness of closing of the water flow even at very low water pressure in the water line, eg also in the vicinity of values of 0.05 MPa. The inlet valve of the present invention also provides a delay in shutting off the inflow, thereby avoiding jolts in the supply line and an unpleasant sound when closing the flow.

- 1 CZ 10511 Ul

Overview of the drawings

The technical design of the inlet valve for the toilet canisters will be explained in more detail with reference to the drawing, in which Fig. 1 shows a cross section of the inlet valve body with a diaphragm in which is located darkly with a circular face forming a protrusion and a valve seat. Fig. 2 shows a detail of darkness with a circular raised surface in a side view; Fig. 2.1 shows the same detail of darkness in axonometry; and Fig. 3 shows a cross section of a diaphragm with a flat lower bearing surface and an inlet valve seat.

Exemplary embodiment

The inlet valve for use in the toilet tanks of Fig. 1 is provided with a rubber diaphragm 1, which is hydraulically operated by means of a nozzle and a lever connected to the float, with a flat lower bearing surface. Inside the diaphragm 1 is then placed a plastic tm 2 provided in its lower part, abutting the inner lower surface of the diaphragm 1, with a circular surface 4 forming a low projection, the diameter of which is equal to the outer diameter of the inlet valve seat 3.

The manipulation with the inlet valve for toilet tanks is identical with most similar types of inlet valves for toilet tanks, ie. The inlet valve is actuated when the water level in the reservoir is reduced after flushing.

The inlet valve for the toilet tank according to this technical solution can be used wherever reduced noise, 100% tightness and no-barrier shut-off of the water flow is required.

Claims (1)

PROTECTION REQUIREMENTS 20 1. Inlet valve for a toilet tank with a closing diaphragm provided with a mandrel inside, operated hydraulically by a nozzle and a closing lever connected to a float, characterized in that the bottom wall of the diaphragm (1) abutting the seat (3) is a flat surface; The tm (2) located inside the diaphragm (1) has in its lower part abutting the inner lower surface of the diaphragm (1) a circular surface (4) forming a low projection. Inlet valve according to claim 1, characterized in that the annular surface (4) forming a low projection at the bottom of the darkness (2) has a minimum diameter equal to the outer diameter of the inlet valve seat (3) and a maximum diameter equal to the outer diameter the inlet valve seat (3) increased by 2 mm.