DE20120764U1 - Pipe arrangement with line balancing valve and flow meter - Google Patents

Description

Pipeline arrangement with balancing valve and flow meter

Description

The invention relates to a pipe arrangement with a branch balancing valve and a flow meter as a structural unit of a house or room heating system with or without a domestic hot water supply system and/or a solar collector system according to the preamble of claim 1.

Heating systems are usually flowed through by a liquid heat transfer medium.

ID Especially in solar collector systems, so-called solar systems, an antifreeze is added to the heat transfer medium to prevent freezing. For this reason, the filling of a solar system cannot simply be carried out via the water pipe.

The filling of such systems takes place via a flushing and filling tap. This is a tubular intermediate piece integrated into the heat transfer circuit with a shut-off tap, with a

SG lockable pipe socket is arranged for filling and emptying (Fig- S)- To fill, the shut-off valve is closed and the liquid medium is filled into one of the two open pipe sockets until it begins to flow out of the other pipe socket- Then

&Xgr;5 the two pipe sockets are closed and the shut-off valve

-S-

opened again! so that the medium can circulate in the system-S

The system is equipped with a circulation pump to circulate the heat carrier. In order to achieve a predetermined flow rate in each branch of the system, a corresponding adjustment is made using a branch balancing valve integrated in the respective branch of the system after the volume flow of the heat carrier has been measured.

To measure the volume flow, it has been proposed to install a flow meter in the circuit (or in the respective line) of the system (Fig. 3). Such a flow meter permanently integrated in the circuit can become dirty over time.

This can affect both the measurement accuracy and the SD readability.

In order to prevent the flow meter from becoming dirty over time, it has been suggested to integrate the flow meter into a bypass, with spring-loaded closure parts only releasing the bypass for cleaning purposes.

Since a string adjustment is only required when installing the solar system, a

3D flow meters do not have to be present in the system continuously

The object of the present invention is to describe a 3S pipe arrangement for a heating system, in particular for a solar system, provided with a branch balancing valve, to which a flow meter can be detachably connected.

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According to claim 1, the solution to this problem consists in a piping arrangement which, in addition to an integrated S line balancing valve, has two pipe sockets - to which either a flow meter or a flushing and filling valve can be connected -

Since the flow meter is not permanently integrated into the pipe arrangement according to the invention but only for measuring purposes, there is no operational contamination and therefore no measurement errors due to contamination. There is also no need to worry about changes due to aging. Since the flow meter is removable, it can be used at many assembly and service locations.

The use of the remaining pipe sockets as flushing and filling taps results in the versatility of the piping arrangement according to the invention.

Especially for solar systems that cannot simply be connected to the water pipe for filling because antifreeze has to be added, a shut-off valve is provided between the two pipe sockets serving as flushing and filling valves to ensure proper filling.

When using a three-way valve, switching between the main line section and the 3D bypass line can be done with a single valve. Backflow prevention is achieved either by a check valve or an automatic valve.

The flow meter can also be permanently integrated in the bypass line. The flow meter is then only ^activated for flow purposes by turning a three-way valve.

Since the flow meter in this arrangement is not permanently switched on in the circuit, incorrect measurements due to contamination are also excluded here.

Even in the case of a flow meter permanently integrated into the bypass line, additional pipe sockets are provided for flushing and filling the system.

Preferably, the pipe ends of the base body and the pipe ends of the flow meter or flushing and filling fitting form the end links of a quick coupling. This makes honing particularly easy.

IS and dismantling or reassembly.

The use of a rotary pointer instrument as a flow meter has proven to be particularly suitable in preliminary tests.

If the relation of the hydraulic resistances to be measured between the supply line and the discharge line on the main line section and between the supply line and the discharge line on the bypass line is known in advance, a simple

&Xgr;5 Adjustment of the respective pipeline section. The adjustment is particularly easy if the main line section and the bypass line have the same (identical) hydraulic resistances.

3D In the following, various embodiments of the generic piping arrangement are described in more detail using the drawings. It shows:

Fig. la shows a preferred embodiment of the pipeline arrangement according to the invention, partly in longitudinal section.

Fig· Ib a detail of this arrangement! namely a

Quick coupling (in longitudinal section) for optional connection S of a flow meter or a flushing and

Filling valve&tgr;

Fig- Ic the longitudinal section through a flow meter in the form of a rotary pointer instrument

Fig. S a flushing and filling tap according to the state of the
ID Techniki in side view=.

Fig. 3 a piping arrangement with

Flow meterπ line balancing valve 1 ■> and flushing and filling valve according to the state of the art in longitudinal section!

in cross section and side view!
IS Fig. 4 and S Principle representations of inventive

Piping arrangementsi

Fig. hai tb and Lc are schematic representations of the functioning of the embodiment shown in Fig. la.

SD The preferred embodiment of the pipeline arrangement �X according to the invention shown in Fig. la has a
Basic structure on &igr; the one shown in Fig. &Xgr;
resembles a conventional flushing and filling tap- Between a
Supply line 4 and a discharge line b there is a

ES main line section ä and one to this

Main line section ö parallel bypass line 10· In
the supply 4 or in the derivation b is a

Regulating ball valve integrated! which serves as a line balancing valve 12-

In the bypass line ID there is a flow meter IM
arranged- This flow meter 14 is removable-The connection to the flow meter 14 forming
Pipe sockets Ib and lfl are connected by means of

ED and SS shut-off ball valves and can be used as flushing and
Filling tap can be used.

For the purpose of using the pipe arrangement S as a flushing and filling valve, another (middle) ball valve &Xgr;4 is located in the middle of the S main pipe section fl as a shut-off valve.

As an alternative to the side shut-off valves ED and ES, two check valves with manual setting or

ID automatic check valves are provided - Fig. Ic shows such a quick coupling ED and EEi where check valves are automatically opened by connecting the flow meter 14 or a flushing and filling fitting -

As a flow meter 14, for example, a float with a spring in a transparent tube or a rotary pointer instrument can be used (Fig. Ic)-

ED The variant shown in Fig- 4 shows an external circulation pump Sb in the inlet 4- With the help of a three-way valve Efl, it is possible to switch between the main line section fl and the bypass line ID- A check valve serves as the centrally arranged valve &Xgr;4- The

ES Bypass line ID can be shut off using an automatic valve ED and a non-return valve SE. The flow meter 14 is removable. The pipe sockets Ib and Ifi are used as flushing and filling valves.

3D usable- In the line L· there is a line balancing valve IS-

Fig. S shows an arrangement in which the flow meter 14 is firmly integrated into the bypass line ID. With the help of a three-way valve Eö, it is also possible to switch between the main line section fl and the bypass line ID. The

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Bypass line ID with another check valve 30
A (not shown) spool and

S The filling valve can be connected via the lockable pipe sockets Ib and la.

The figures bai bb and bc show the
Functioning of the arrangement according to the invention

ID clarify:

According to Fig. ha, pipe sockets of a (not shown) flushing and filling fitting are connected.' For the purpose of
Flushing and filling, the line balancing valve 15 and the two side shut-off valves SO and SS are open.

while the middle stopcock EM is closed-To
Hesse of the volume flow is according to Fig- bb of the
Flow meter 14 connected to the base body - The side shut-off valves EO and EE which were previously closed are opened so that the entire flow between supply and 4

ED and derivative b flowing volume flow through the
Flow meter 14 flows· Hit help of
The desired
Volume flow can be adjusted-Then
the side-mounted shut-off valves

ES SO and ES closed and the centrally located ball valve > opened. Fig. bc shows the arrangement with removed
Flowmeter 14-

List of reference symbols

5 Piping arrangement

with line balancing valve and flow meter 4 Supply lineT Inlet (line) b Derivative! Outlet (line) fl Main line section ID Bypass line IE Line balancing valve 14 Flow meter (rotary pointer instrument)

Ib&igr; lö pipe socket

20 Shut-off (ball) valve (automatic valve &tgr; quick coupling) SE Shut-off (ball) valve (automatic valve &tgr; quick coupling or check valve)

54 (middle) shut-off valve (ball valve-i check valve) Eb circulation pump Efi three-way valves three-way valve 3D shut-off devices (further) check valve

Claims (8)

1. Piping arrangement ( 2 ),
wherein a main line section ( 8 ) and a bypass line ( 10 ) parallel thereto are arranged between the supply line ( 4 ) and the discharge line ( 6 ),
and wherein a line balancing valve ( 12 ) is arranged in the supply line ( 4 ) or discharge line ( 6 ) and a flow meter ( 14 ) is arranged in the bypass line ( 10 ),
characterized , - that the two pipe sockets ( 16 and 18 ) forming the connection to the flow meter ( 14 ) can be shut off, - that the flow meter ( 14 ) is removable from these pipe sockets ( 16 and 18 ), and - that the two pipe sockets ( 16 and 18 ) can be used as flushing and filling taps. 2. Pipe arrangement according to claim 1, characterized in that a shut-off valve ( 24 ) is arranged in the main line section ( 8 ). 3. Pipeline arrangement according to claim 1, characterized in - that the shut-off valve ( 24 ) arranged in the main line section is a check valve, - that a three-way valve ( 28 ) is arranged between the supply line ( 4 ) or discharge line ( 6 ) on the one hand and the main line section ( 8 ) and bypass line ( 10 ) on the other hand, and - that the lockable pipe socket ( 16 ) facing the three-way valve ( 28 ) is provided with an automatic valve ( 20 ), and the other pipe socket ( 18 ) is provided with a check valve ( 22 ). 4. Pipe arrangement according to one of claims 1 to 3, characterized by lockable pipe sockets ( 16 and 18 ) on the common supply line ( 4 ) and on the bypass line ( 10 ), wherein a shut-off means ( 30 ) is located in the bypass line ( 10 ) between the two pipe sockets ( 16 and 18 ). 5. Pipeline arrangement according to claim 4, characterized in that the shut-off means ( 30 ) is a check valve. 6. Pipeline arrangement according to one of claims 1 to 5, characterized in that the pipe sockets ( 16 and 18 ) of the base body of the pipeline arrangement ( 2 ) on the one hand and the pipe sockets of the flow meter ( 14 ) or a flushing and filling fitting on the other hand are designed as parts of a quick coupling. 7. Pipeline arrangement according to one of claims 1 to 6, characterized in that the flow meter ( 14 ) is a rotary pointer instrument. 8. Pipeline arrangement according to one of claims 1 to 7, characterized in - that the relation of the hydraulic resistances to be measured between the supply line ( 4 ) and the discharge line ( 6 ) on the main line section ( 8 ) and between the supply line ( 4 ) and the discharge line ( 6 ) on the bypass line ( 1 D) is known and the measuring device ( 14 ) is calibrated accordingly, or - that the main line section ( 8 ) and the bypass line ( 10 ) - each measured between the supply line ( 4 ) and the discharge line ( 6 ) - have the same hydraulic resistance.