DE612409C - Outlet valve for water pipes - Google Patents

Description

i ■ «Γ,

GERMAN EMPIRE

ISSUED ON
APRIL 24, 1935

'REICH PATENT OFFICE

PATENT LETTERING

Vr 612409 CLASS 47 gi GROUP 35oi

2) t.-3ng. Dieter Thoma in Munich outlet valve for water pipes

Patented in the German Empire on January 4, 1934

It is known that the. Passage of the water through valves, such as. B. the Frcilauflaufventile of water turbines, resulting noise is greatly diminished when one immediately behind the smallest cross-section (throttle cross-section between the valve seat and sealing washer) allows air to enter. Applying this procedure to Water outlet valves (so-called taps) however, this is not easily possible because with these larger flow rates no air is sucked in. The cross-section at the mouth of the outlet pipe must not be of any size. because otherwise the outlet will be too restless with a small flow rate; with large flow rates there is therefore considerable pressure (a few meters of water column) required to force the water through the outlet pipe, and this Pressure prevents air from entering through openings behind the throttle cross-section could arrange.

In order to allow air access, according to the present invention, in the valve housing in a manner known per se, an annular space is arranged which has the throttle cross-section encloses so that the emerging from the throttle cross-section srheibenformige Ray enters the ring-shaped space from the inside and is in it with the already water present there mixed; this mixing creates the one to drift through of the water through the outlet pipe necessary pressure, while at the - inner edge of the annulus a small negative pressure that allows air to be sucked in.

The annulus will. expediently dimensioned so that in it only a partial mixing of the jet takes place with the already leaked water, so that only a relatively small fraction of the energy of the beam in it is converted into pressure; "the main part of the beam energy is then outside the annular space in the valve housing 'destroyed, the cross-sections of this are expediently made so large that there is no significant further increase in pressure. This distribution of the energy conversion in two stages is permissible because the one that drives the water through the Outlet pipe required pressure with a small fraction of the pressure in the inlet pipe is; it is useful because then the shapes of the annular space (in which the first stage of the implementation) can be chosen so that a constant pressure implementation over time takes place, which is not disturbed by the gross eddies generated in the annihilation of the main part of the energy occur.

In Fig. Ι an embodiment of the invention is shown as an example. It denotes α the inlet pipe, b the valve housing, c the outlet pipe, d the Vcniilspindel, e the sealing washer and / the valve seat. The plate-shaped body h is firmly connected to the valve spindle <: /

Claims (1)

together with the bottom of the housing & forms the annular space »·. The upper side of the jet emerging between e and / is ventilated through a groove turned into Ii , to which the air is fed through the bores / "in Ii and through the bore / which runs through the entire length of the valve spindle d and is open at the top (The handle of the valve spindle is not shown in the figure because it is not essential, and the stuffing box, which is usually attached to the valve cover α to prevent water from escaping along the valve spindle, is also missing in the figure.) Annular space 0 · outwardly exiting water loses most of its energy in the relatively large space above h and then flows sufficiently calmly through the wide opening in the housing wall into the outlet pipe c . The described ventilation of the upper side of the jet is particularly important because the sealing washer e consists of soft or "semi-soft building material and therefore does not reliably retain the sharp edges that it initially has in operation At the edge of the sealing washer, in a very narrow space, flow conditions occur which cause noise. In many cases, however, it will be advisable to also carry out the less important ventilation of the underside of the jet. In the case of the tap shown in Fig. 1, this occurs through a groove k in the bottom of the housing b, to which air is supplied through a bore in . The bore m is arranged in a rib I , which lies partly inside and partly outside the housing and so because it is led upwards so that no water is present after the tap is closed can leak through the hole. Another embodiment of the invention is shown in Figs. The parts α up to and including g have the same meaning as in Fig. 1. The housing cover consists of an upper part ρ and a lower part q, which is connected to the upper part by three ribs r with a triangular cross-section; the shape of the ribs can be seen from Fig. 3, which shows the section xx. The two parts ρ and q enclose the annular space g between them. The upper side of the jet is ventilated through the bores t, the lower side of the jet by the bores s penetrating the ribs /. The water emerging from the space, still at high speed, is deflected downwards by the bell-shaped guide surface 11 attached to ρ and loses its energy in space ν; the water then flows up between it and b and calmly enters the outlet pipe c . Fa τ ü ν τ α ν s l> κ υ c 11: Outlet valve for water pipes: in which the flow in the throttle cross-section between the valve seat and the sealing washer is from the inside to the outside, characterized by an annular space (g, g) arranged around the throttle cross-section, which causes a delay in the disruptive speed of the water jet and an increase in pressure, and through air supply ducts (i, m, s) opening into the inner edge of the annular space, through which the water entering the annular space from the throttle cross-section can suck in air. 1 sheet of drawings