DE2931739C2 - Overflow valve for installation in hot water heating systems - Google Patents

Description

The invention relates to an overflow valve with an inlet, an outlet and a bypass Stutzcn for Installation in hot water heating system with a flow line, a return line and a bypass line between these two lines, the bypass is designed to be shut off with a check valve.

With hot water heating systems. especially with those whose Heizkkörpers-Absperrorganc depending on are automatically controlled by the room temperature, it is necessary to arrange an overflow valve, in order to maintain a minimum amount of water in circulation even when the shut-off devices are closed.

For this purpose, an overflow valve is known from DE-GM 78 02 444, which is installed in the flow line and whose bypass is connected to the return line.

This overflow valve has two valve seats, each of which is assigned a valve body. Both valve bodies are connected to one another by means of a rod.
Min Ventilsir / is arranged at the mouth of the bypass connection opening into the valve housing. The other valve seat is provided between the latter and the outlet connection and both valve bodies are designed to open in the direction of flow of the advancing water.

However, this overflow valve is relatively complex and also relatively difficult to assemble. the from DE-OS 27 50 098 known hot water heating system, one of the differential pressure regulators responding to the differential pressure in the supply and return pipes conditional, is also relatively complicated and expensive.

The object of the invention is now to provide for an overflow valve as specified in the preamble of claim t Generate opportunities to significantly simplify manufacture and assembly.

This object is achieved in that the overflow valve is arranged in the return line. that the check valve closes in the direction of flow and that the acted upon by the backflowing water surface of the valve body of the check valve is larger than the clear passage cross-section of the valve seat corresponding to the valve body.

These measures mean that the above-described requirements for an overflow valve are no longer met only one with only one valve seat and one valve body. from which the sought The result is simplification of installation and assembly.

In order to achieve favorable flow conditions, it is It is advantageous if it is coaxial with the inlet nozzle arranged valve seat continues in a pipe bend, which opens into the sideways bypass connection.

In order to be able to arrange the overflow valve in any position, a closing spring is assigned to the valve body. in addition, the closing spring, which is designed as a compression spring, is preferably on the one hand on the valve body crscitc and on the other hand on a housing shoulder provided in the area of the inlet port / .c-ns. A variant which may be preferred under certain circumstances consists in that on the valve body there is one in the direction of flow of the water directed pin is provided. the one to the valve seat coaxially aligned bore in Elbow reaches through at least approximately tightly, and that one on the one hand at the end part of the pin attacking, on the other hand, supported on the outside of the pipe bend, designed as a compression spring closing spring is arranged.

Ausfülmmgsbeispielc of the invention are in Drawing shown and are described in more detail below. It shows

F-'ig. I a schematic representation of a hot water heating system with an overflow valve;

2 shows an enlarged illustration of an overflow valve Longitudinal section:

3 shows a further embodiment of an overflow valve. also seen in longitudinal section.

Here, a hot water cr / eugcr is in the flow line 1 2 arranged a circulation pump 3, the cr-M) warms water to a radiator 4 promotes, which Via a return line 5 to the hot water feeder 2 flows back.

The radiator 4 is a Thcrmostatvcntil (not shown) upstream.

h5 Furthermore, there is an overflow valve in the return line 5 6 arranged, which via a bypass 7 with dor flow line I connected.

The overflow valve 6 has an inlet valve 8.

an outlet port 9 which are coaxially aligned with one another and a bypass port 10 that is directed to the right / including the latter.

The latter settles inside the valve housing in one molded pipe bend 11, the mouth of which is directed towards the inlet port 8 and as a valve seat 12 is trained. A valve body corresponds to this 13, the side 14 of which is larger than the clear passage cross section of the valve seat 12 on the valve body 13 is a closing spring designed as a compression spring 15 effective, which is under spring tension in F i g. 2 on the one hand on the valve body side 14 and on the other hand is supported on a housing shoulder 16 integrally formed near the inlet connection 8.

In Figure 3 is a coaxially striving on the valve body 13 Shaped pin 17.

This extends axially displaceably through a bore 18 in the pipe bend 11. On the Zapfenendleil a closing spring 15 is attached, on the one hand on a abutment 19 attached to the journal end part and on the other hand on the outside of the tubular bend 11.

The valve body 13 are achspanü-IeI by means of several extending ribs 20 arranged vertically on the circumference in the valve seat 12 are axially displaced.

1 sheet of drawings

30th

bO

Claims (5)

Patent claims: 1. Overflow valve with an inlet, an outlet and a bypass Stutzcn for installation in Hot water heating systems with a flow line, a return line and a bypass line between these two lines, the bypass being designed to be shut off with a check valve is, characterized in that the overflow valve (6) is arranged in the return line (5) is that the check valve (12,13) in the direction of flow closes and that acted upon by the backflowing water surface of the valve body (13) of the check valve is larger than the is the clear passage cross-section of the valve seat (12) corresponding to the valve body. 2. Overflow valve according to claim 1, characterized in that the inlet connection (8) is coaxial arranged valve seat (12) continues in a pipe bend (11), which in the sideways bypass connection (10) opens. 3. Overflow valve according to one of the preceding claims, characterized in that the A closing spring (15) is assigned to the valve body (13). 4. Overflow valve according to one of the preceding claims, characterized in that the closing spring (15) designed as a compression spring is supported on the one hand on the valve body side (14) and on the other hand on a housing shoulder (16) provided in the region of the inlet connector (8). 5. Overflow valve according to cinc.ii of the previous one Claims, characterized in that on the valve body (13) an in-flow of the water directed pin (17) is provided. the one to the valve seat (12) coaxially aligned bore (18) in the pipe bend (11) at least approximately tightly goes through, and that one on the one hand on the end part of the pin (17) engaging, on the other hand on the outside of the pipe bend (11) supported closing spring (15) designed as a compression spring is arranged is.