EP0179271B1 - Filling arrangement for filling closed liquid heating circuits - Google Patents

Filling arrangement for filling closed liquid heating circuits Download PDF

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Publication number
EP0179271B1
EP0179271B1 EP85111774A EP85111774A EP0179271B1 EP 0179271 B1 EP0179271 B1 EP 0179271B1 EP 85111774 A EP85111774 A EP 85111774A EP 85111774 A EP85111774 A EP 85111774A EP 0179271 B1 EP0179271 B1 EP 0179271B1
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EP
European Patent Office
Prior art keywords
pressure
outlet
control
fresh water
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP85111774A
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German (de)
French (fr)
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EP0179271A2 (en
EP0179271A3 (en
Inventor
Arend Sasserath
Willi Hecking
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Hans Sasserath GmbH and Co KG
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Hans Sasserath GmbH and Co KG
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Publication date
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Priority to AT85111774T priority Critical patent/ATE51955T1/en
Publication of EP0179271A2 publication Critical patent/EP0179271A2/en
Publication of EP0179271A3 publication Critical patent/EP0179271A3/en
Application granted granted Critical
Publication of EP0179271B1 publication Critical patent/EP0179271B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1083—Filling valves or arrangements for filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1036—Having differential pressure measurement facilities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system

Definitions

  • Pressure reducers of this type are used for filling a closed heating system and serve to fill this system automatically.
  • the pressure reducer is set to a predetermined pressure and closes when this pressure is reached, so that the pressure in the closed system cannot exceed a predetermined value.
  • the backflow preventer is provided between the outlet side of the pressure reducer and the closed system and prevents the filling medium or water from the closed system from being pushed back into the supply line if the inlet pressure of the pressure reducer drops below the internal pressure of the closed system.
  • the known filling device is not constantly connected to the closed system according to existing regulations, but only via a hose line to be removed after the filling process.
  • This has a disadvantageous effect, particularly in the case of larger systems, because the venting process of such systems takes a long time, possibly up to 6 months, and during this venting period, filling medium or water must be constantly refilled into the system so that the required pressure within the closed system is maintained. Repeated refilling operations of this type are tedious, and for this reason attempts have been made to automatically fill the closed system, in compliance with the legal provisions, by connecting an unpressurized water tank, which is controlled by a float valve, to the closed system via a booster pump becomes.
  • a booster pump must be used, although the pressure in the supply line itself would be sufficient to ensure the necessary filling pressure of the closed system.
  • a thermally controlled safety device for boilers in closed heating systems is known from EP-A2-0 041 163.
  • a boiler heated with solid fuels is provided.
  • the aim is to prevent overpressure from occurring in the event of overtemperature, which leads to the safety valve responding. For this reason, cold fresh water from the supply line is let into the system of the heating system if the temperature is too high, and warm heating water is drained off at the same time via a drain.
  • a pipe separator is arranged in the fresh water supply line. The pipe separator disconnects the connection between the fresh water pipe and the heating system, so that an observable separation point is created between them. The separation point is bridged only by a water-carrying, movable link in the form of a sliding sleeve for fresh water supply and the connection between the fresh water line and the heating system is established.
  • the pipe separator contains a flow connection with a large cross section and a control connection with a small cross section.
  • the flow connection is directly connected to the outlet of a pressure reducer.
  • the control connection is controlled by a poppet valve.
  • the poppet valve is controlled by the actuator of a temperature sensor that responds to the boiler temperature. At the same time, this actuator controls a "thermal discharge safety device", which causes the discharge of hot heating water.
  • the pipe separator contains in the known arrangement as an actuating piston an annular piston which is guided outside in a cylinder and inside on a tube.
  • the pipe is connected at one end to the outlet of the pressure reducer and closed at the other end.
  • the tube has side outlets.
  • a sleeve is connected to the actuating piston, which sleeve is displaceably guided on the tube and, with its end, can be inserted into a receptacle on the heating system in a sealing manner beyond the separation point.
  • the inside of the sleeve has an annular recess, via which the cable outlets of the tube come into connection with the bore of the sleeve when the end of the sleeve is inserted into the receptacle in its operating position.
  • a backflow preventer is provided on the heating system side of the separation point.
  • the invention has for its object a To create automatic filling device of the type mentioned, which can be connected directly to the supply line and allows the pressure in the supply line to be used to automatically fill the closed system.
  • the filling device designed according to the invention represents a unitary assembly which uses the pipe separator to establish a connection between the supply line and the closed system.
  • This module can always be left in connection with the supply line and the closed system without the risk that the filling medium is pressed back out of the closed system into the supply line.
  • the interposition of the pipe separator controlled by the control arrangement brings about a reliable separation of the supply line from the closed system when its predetermined internal pressure has been reached.
  • the pipe separator ensures that filling medium is pressed back into the supply line from the filled system if the pressure in the supply line drops below the internal pressure prevailing in the filled system.
  • the illustration shows a longitudinal section through the exemplary embodiment of the filling device.
  • This consists of an essentially conventionally constructed pressure reducer, which is generally designated 1.
  • This pressure reducer is set to a pressure which is matched to the predetermined internal pressure or filling pressure of the closed system.
  • the structure of the pressure reducer 1 and its function and setting are known and are therefore not described in detail.
  • the pressure reducer On the input side, the pressure reducer is provided with a connecting piece 2, to which a connecting piece 4 is fastened by means of a union nut 3, by means of which the pressure reducer 1 can be permanently connected to a supply line, not shown.
  • a shoulder 5 is fixedly connected to the pressure reducer 1, which receives the pipe separator described below.
  • a backflow preventer In the free end 6 of the neck 5, a backflow preventer, generally designated 7, is inserted by means of a connecting part 8.
  • the backflow preventer 7 carries at the other end on a connecting piece 9 a union nut 10, through which a connector 11 is held, by means of which the entire filling device can be permanently connected as a uniform fitting to the closed system, not shown.
  • the backflow preventer 7 contains a spring-loaded closing body which is held against the seat by the spring load in the closing system and which blocks the backflow preventer 7 against the shoulder 5 and thus against the pressure reducer 1.
  • the connecting part 8 of the backflow preventer 7 contains a bypass line 13 which bypasses the closing body 12 and opens into an annular chamber 14, in which the internal pressure of the closed system therefore prevails.
  • a separation point 15 is installed, which allows a visual inspection of the space between the pipe separator 20 described below and the check valve 7 and in the usual and therefore not particularly described Is trained.
  • a leak drain pipe 16 branches off from the attachment 5 and is connected in a conventional manner to an existing disposal line.
  • the pressure reducer 1 also carries on one side a not particularly marked setting device of conventional design for setting an outlet pressure which is matched to the predetermined internal pressure or filling pressure of the closed system. On the opposite side, the pressure reducer 1 carries a control arrangement 40, described in detail below, for controlling the pipe separator 20.
  • the approach 5 of the pressure reducer 1 is designed so that it serves as a housing for the pipe separator 20.
  • This pipe separator 20 consists of a pipe 21 which is closed on one side and which is inserted in a sealing manner in the attachment 5 on the pressure reducer 1.
  • At the closed end of the tube 21 through openings 22 are formed in its side wall, three of which can be seen in the figure.
  • An annular piston 23 is displaceable on the tube 21 against the force of a spring 24.
  • the head 25 of the annular piston 23 faces the pressure reducer 1; the spring 24 acts on the side of the head 25 facing away from the pressure reducer 1 and is supported on an abutment 26, which in the vicinity of the separation point 15 is held on the approach 5.
  • the annular piston 23 also has a recess 27 in its wall and forms an annular gap 28 between the recess 27 and the through openings 22 in the tube 21 which is closed on one side.
  • the pipe separator 20 is shown in its closed position in the figure. In this position, the annular piston 23 lies in a sealing manner against the tube 21, which is closed on one side, so that the through openings 22 of the tube 21 are closed.
  • the connecting part 8 of the backflow preventer 7 contains, on the side opposite the pipe separator 20, a recess 29 which is adapted to the annular piston 23 of the pipe separator 20 and receives it in its second or open position.
  • the recess 29 is provided with sealing means 30, by means of which the annular piston 23 is sealingly inserted into the recess 29 in the second or open position.
  • the control arrangement 40 consists essentially of control valves and a differential pressure transmitter for controlling the control valves; the control arrangement 40 is arranged on the pressure regulator 1 on the side opposite the adjusting device.
  • the differential pressure transmitter 41 essentially consists of two chambers 42, 43 which are separated from one another by a movable wall 44 in the form of a membrane.
  • the chamber 42 facing away from the pressure reducer 1 is connected to the outlet side of the pressure reducer 1 via a connecting line 45 shown in broken lines.
  • the chamber 43 is connected to the ring channel 14 in the connecting part 8 of the check valve 7 via a connecting line 46 shown in broken lines.
  • the differential pressure sensor 41 is fastened in a sealing manner to a further extension 48 of the pressure reducer 1 by means of a union nut 47.
  • the movable wall 44 carries a plate 49 to which a control rod 50 is fastened, which extends sealingly into the interior of the further extension 48 through a sealing body 51.
  • a valve seat body 52 is formed in the interior of the pressure reducer 1 on the outlet side thereof in the further extension 48.
  • a valve seat 53 of a control valve with a spring-loaded valve body 54 is located on the valve seat body 52 on the side facing away from the pressure difference transmitter 41.
  • the valve body 54 is supported by a compression spring which is supported on an opposite part of the pressure reducer 1, in the exemplary embodiment on its single-seat valve. held in closing system on its valve seat 53.
  • the valve body 56 is under the action of a tension spring which is arranged on the valve seat body 52 and the valve body 56 in a closed contact with its valve seat 55 holds.
  • An axial bore 57 extends through the valve seat body 52, from which a control line 58 branches off between the valve seats 53 and 55, which connects the axial bore 57 and an annular space of the extension 5 and on a side opposite in the head 25 of the annular piston 23 of the pipe separator 20 opens into the annular space 60.
  • a relief line 59 extends from the further extension 48, which extends essentially parallel to the control line 58 and extension 5 and extends to the leakage drain pipe 16.
  • the control rod 50 of the differential pressure sensor 41 extends sealingly but slidably through the valve body 56 and the valve seat 55 of the relief valve and through the axial bore 57 of the valve seat body 52 and carries at its free end a control body 61 which cooperates with the valve body 54 of the control valve.
  • the filling device described above works as follows:
  • the figure shows the filling device and the pipe separator 20 in their closed position. Accordingly, the backflow preventer 7 is closed by the closing body 12 against the attachment 5 or the pressure reducing valve 1. Any filling medium escaping from the closing body 12 is drained off through the leakage drain pipe 16.
  • the annular piston 23 is brought under the action of the spring 24 into the retracted position in which it closes the through openings 22 of the tube 21 closed on one side in the tube separator 20.
  • the internal pressure or filling pressure of the closed system is the same as the outlet pressure of the pressure reducer 1, and therefore the pressures prevailing in the chambers 42 and 43 of the differential pressure sensor 41 are also the same.
  • the control rod 51 is thus in its retracted position and the valve body 54 of the control valve on the output side of the pressure reducer 1 is in contact with the valve seat 53.
  • the control line 58 and the interior of the extension 5 are depressurized, so that the valve body 56 of the relief valve, the valve seat 55 of which is in close contact.
  • the filling medium can then flow out through the axial bore 57 and the valve seat 55 of the relief valve on the valve seat body 52 into the relief line 59 and the spring 24 brings about the resetting of the annular piston 23.
  • the valve body 56 After resetting the annular piston 23 and pressure compensation in the control line 58, the valve body 56 the relief valve is brought back into its closing system on its valve seat 55, so that the filling device again assumes the closed position shown in the figure.
  • the pipe separator 20 can under certain circumstances also form a part which is separate from the pressure reducer 1 and which is connected to the outlet side of the pressure reducer 1 using conventional connecting means.
  • the chamber 43 of the differential pressure sensor 41 can also be connected in any other conceivable way so that the internal pressure or filling pressure prevailing in the closed system is present in this chamber.
  • the relief line 59 can also be routed separately from the attachment 5 to the leak drain pipe 16.
  • the arrangement of the different lugs and connecting pieces is arbitrary and does not need to be opposite one another in a crosswise manner as in the exemplary embodiment shown.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Packaging Of Special Articles (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Thermally Insulated Containers For Foods (AREA)
  • Resistance Heating (AREA)
  • Safety Valves (AREA)
  • Basic Packing Technique (AREA)

Abstract

1. Filling device for introducing fresh water into a closed heating installation, comprising (a) a pressure reductor (1) connected on the inlet side to a fresh water conduction, (b) a tube separator (20) connected to the outlet side of the pressure reductor (1) and having a water-carrying movable member (23), - which in a first operative position is advanced and establishes a connection between a fresh water outlet (22) communicating with the outlet of the pressure reductor (1) and the heating installation, bridging a point of separation (15), - which, in a resting position, ends upstream from the point of separation and closes the fresh water outlet (22), and - which is displaceable by a servomotor to which is applied the fresh water pressure from the resting position to the operative position, (c) a backflow preventor (7) arranged downstream from the tube separator (20) and the point of separation (15) and connected to an inlet of the heating system, and (d) a control arrangement (40) arranged to control the application of the fresh water pressure to the servomotor, characterized in that (e) the control arrangement (40) comprises a differential pressure sensor (41) on which is applied, on one side, the pressure from the outlet of the pressure reductor (1) and, on the other side, the pressure in the heating system, (f) the servomotor for the tube separator (20) is arranged to be controlled by the differential pressure sensor (41) such that - the tube separator (20) is moved, with a first pressure in the heating installation which is equal to the pressure at the outlet of the pressure reductor, to its resting position, and - the tube separator (20) is arranged to be advanced to its operative position with a second pressure in the heating installation which is less than the first pressure.

Description

Die Erfindung betrifft eine Fülleinrichtung zum Einleiten in eine geschlossene Heizungsanlage, enthaltend

  • (a) einen Druckminderer, der eingangsseitig mit einer Frischwasserleitung verbunden ist,
  • (b) einen mit der Ausgangsseite des Druckminderers verbundenen Rohrtrenner mit einem wasserführenden, beweglichen Glied, das
    • -in einer ersten Betriebsstellung vorbewegt ist und eine Verbindung zwischen einem mit dem Ausgang des Druckminderers in Verbindung stehenden Frischwasserauslaß und der Heizungsanlage unter Überbrückung einer Trennstelle herstellt,
    • -in einer Ruhestellung stromauf von der Trennstelle endet und den Frischwasserauslaß abschließt und
    • -durch einen vom Frischwasserausdruck beaufschlagten Stellantrieb aus der Ruhestellung in die Betriebsstellung bewegbar ist.
  • (c) einen stromab von dem Rohrtrenner und der Trennstelle angeordneten, mit einem Einlaß des Heizungssystems verbundenen Rückflußverhinderer, und
  • (d) eine Steueranordnung, durch welche die Beaufschlagung des Stellantriebs mit dem Frischwasserdruck steuerbar ist.
The invention relates to a filling device for introducing into a closed heating system, containing
  • (a) a pressure reducer, which is connected on the inlet side to a fresh water line,
  • (b) a pipe separator connected to the outlet side of the pressure reducer with a water-carrying, movable member which
    • is moved forward in a first operating position and establishes a connection between a fresh water outlet connected to the outlet of the pressure reducer and the heating system, bridging a separation point,
    • -in a rest position upstream of the separation point and closes the fresh water outlet and
    • is movable from the rest position into the operating position by an actuator acted upon by the fresh water expression.
  • (c) a backflow preventer connected downstream of the pipe separator and the separation point and connected to an inlet of the heating system, and
  • (d) a control arrangement by means of which the application of the fresh water pressure to the actuator can be controlled.

Druckminderer dieser Art, z.B. nach der DE-A1-30 07 454 werden beispielsweise zur Füllung an eine geschlossene Heizungsanlage verwendet und dienen dazu, diese Anlage automatisch zu befüllen. Der Druckminderer wird auf einen vorbestimmten Druck eingestellt und schließt bei Erreichen dieses Druckes, so daß der Druck in der geschlossenen Anlage einen so vorgegebenen Wert nicht überschreiten kann. Der Rückflußverhinderer ist zwischen der Ausgangsseite des Druckminderers und der geschlossenen Anlage vorgesehen und verhindert, daß das Füllmedium bzw. Wasser aus der geschlossenen Anlage heraus in die Versorgungsleitung zurückgedrückt werden kann, falls der Eingangsdruck des Druckminderers unter den Innendruck der geschlossenen Anlage abfällt.Pressure reducers of this type, e.g. According to DE-A1-30 07 454, for example, they are used for filling a closed heating system and serve to fill this system automatically. The pressure reducer is set to a predetermined pressure and closes when this pressure is reached, so that the pressure in the closed system cannot exceed a predetermined value. The backflow preventer is provided between the outlet side of the pressure reducer and the closed system and prevents the filling medium or water from the closed system from being pushed back into the supply line if the inlet pressure of the pressure reducer drops below the internal pressure of the closed system.

Die bekannte Fülleinrichtung wird nach bestehenden Vorschriften nicht ständig, sondern nur über eine nach Beendigung des Füllvorgangs abzunehmende Schlauchleitung an die geschlossene Anlage angeschlossen. Dies wirkt sich besonders bei ausgedehnteren Anlagen nachteilig aus, weil der Entlüftungsvorgang solcher Anlagen lange Zeiten, unter Umständen bis zu 6 Monaten, benötigt und während dieser Entlüftungsperiode ständig Füllmedium bzw. Wasser in die Anlage nachgefüllt werden muß, damit der erforderliche Druck innerhalb der geschlossenen Anlage aufrechterhalten bleibt. Solche wiederholt durchzuführenden Nachfüllvorgänge sind mühsam, und aus diesem Grunde hat man versucht, unter Einhaltung der gesetzlichen Bestimmungen eine selbsttätige Füllung der geschlossenen Anlage dadurch zu erreichen, daß ein druckloser Wasserbehälter, der über ein Schwimmerventil gesteuert wird, über eine Druckerhöhungspumpe mit der geschlossenen Anlage verbunden wird. Jedoch ist eine solche Nachfülleinrichtung relativ aufwendig und auch dadurch nachteilig, daß eine Druckerhöhungspumpe eingesetzt werden muß, obwohl der Druck in der Versorgungsleitung an sich völlig ausreichen würde, um den notwendigen Fülldruck der geschlossene Anlage zu gewährleisten.The known filling device is not constantly connected to the closed system according to existing regulations, but only via a hose line to be removed after the filling process. This has a disadvantageous effect, particularly in the case of larger systems, because the venting process of such systems takes a long time, possibly up to 6 months, and during this venting period, filling medium or water must be constantly refilled into the system so that the required pressure within the closed system is maintained. Repeated refilling operations of this type are tedious, and for this reason attempts have been made to automatically fill the closed system, in compliance with the legal provisions, by connecting an unpressurized water tank, which is controlled by a float valve, to the closed system via a booster pump becomes. However, such a refill is relatively complex and also disadvantageous in that a booster pump must be used, although the pressure in the supply line itself would be sufficient to ensure the necessary filling pressure of the closed system.

Durch die EP-A2-0 041 163 ist eine thermisch gesteuerte Sicherheitseinrichtung für Kessel in geschlossenen Heizungsanlagen bekannt. Bei dieser ist ein mit festen Brennstoffen beheizter Kessel vorgesehen. Es soll verhindert werden, daß bei Übertempereatur ein Überdruck auftritt, der zu einem Ansprechen des Sicherheitsventils führt. Daher wird bei Übertemperatur kaltes Frischwasser aus der Versorgungsleitung in das System der Heizungsanlage eingelassen und gleichzeitig warmes Heizungswasser über einen Ablauf abgelassen. Da es nicht zulässig ist, die Versorgungsleitung ständig, und sei es über ein Steuerventil, mit dem Heizungssystem zu verbinden, ist in der Frischwasserzuleitung ein Rohrtrenner angeordnet. Der Rohrtrenner trennt die Verbindung zwischen Frischwasserleitung und Heizungssystem auf, so daß dazwischen eine beobachtbare Trennstelle entsteht. Nur zur Frischwasserzufuhr wird die Trennstelle durch ein wasserführendes, bewegliches Glied in Form einer verschiebbaren Hülse überbrückt und die Verbindung zwischen Frischwasserleitung und Heizungssystem hergestellt.A thermally controlled safety device for boilers in closed heating systems is known from EP-A2-0 041 163. In this, a boiler heated with solid fuels is provided. The aim is to prevent overpressure from occurring in the event of overtemperature, which leads to the safety valve responding. For this reason, cold fresh water from the supply line is let into the system of the heating system if the temperature is too high, and warm heating water is drained off at the same time via a drain. Since it is not permissible to connect the supply line to the heating system continuously, be it via a control valve, a pipe separator is arranged in the fresh water supply line. The pipe separator disconnects the connection between the fresh water pipe and the heating system, so that an observable separation point is created between them. The separation point is bridged only by a water-carrying, movable link in the form of a sliding sleeve for fresh water supply and the connection between the fresh water line and the heating system is established.

Bei der EP-A2-0 041 163 enthält der Rohrtrenner einen Durchflußanschluß von großem Querschnitt und einen Steueranschluß von kleinem Querschnitt. Der Durchflußanschluß ist unmittelbar mit dem Auslaß eines Druckminderers verbunden. Der Steueranschluß wird von einem Tellerventil beherrscht. Das Tellerventil ist durch das Stellglied eines auf die Kesseltemperatur ansprechenden Temperaturfühlers gesteuert. Dieses Stellglied steuert gleichzeitig eine "thermische Ablaufsicherung", welche den Ablauf von heißem Heizungswasser bewirkt.In EP-A2-0 041 163 the pipe separator contains a flow connection with a large cross section and a control connection with a small cross section. The flow connection is directly connected to the outlet of a pressure reducer. The control connection is controlled by a poppet valve. The poppet valve is controlled by the actuator of a temperature sensor that responds to the boiler temperature. At the same time, this actuator controls a "thermal discharge safety device", which causes the discharge of hot heating water.

Der Rohrtrenner enthält bei der bekannten Anordnung als Stellkolben einen Ringkolben, der außen in einem Zylinder und innen auf einem Rohr geführt ist. Das Rohr ist an einen Ende mit dem Ausgang des Druckminderers verbunden und an dem anderen Ende geschlossen. Das Rohr weist seitliche Auslässe auf. Mit dem Stellkolben ist eine Hülse verbunden, die auf dem Rohr verschiebbar geführt und mit ihrem Ende über die Trennstelle hinaus abdichtend in eine heizungssystemseitige Aufnahme einführbar ist. Die Hülse weist auf ihrer Innenseite eine ringförmige Ausnehmung auf, über weiche die seilichen Auslässe des Rohres mit der Bohrung der Hülse in Verbindung kommen, wenn die Hülse in ihrer Betriebsstellung mit ihrem Ende in die Aufnahme eingeführt ist.The pipe separator contains in the known arrangement as an actuating piston an annular piston which is guided outside in a cylinder and inside on a tube. The pipe is connected at one end to the outlet of the pressure reducer and closed at the other end. The tube has side outlets. A sleeve is connected to the actuating piston, which sleeve is displaceably guided on the tube and, with its end, can be inserted into a receptacle on the heating system in a sealing manner beyond the separation point. The inside of the sleeve has an annular recess, via which the cable outlets of the tube come into connection with the bore of the sleeve when the end of the sleeve is inserted into the receptacle in its operating position.

Heizungssystemseitig von der Trennstelle ist ein Rückflußverhinderer vorgesehen.A backflow preventer is provided on the heating system side of the separation point.

Der Erfindung liegt die Aufgabe zugrunde, eine selbsttätige Fülleinrichtung der eingangs genannten Art zu schaffen, die direkt an die Versorgungsleitung anschließbar ist und die Ausnutzung des in der Versorungsleitung herrschenden Druckes zum selbsttätigen Befüllen der geschlossenen Anlage gestattet.The invention has for its object a To create automatic filling device of the type mentioned, which can be connected directly to the supply line and allows the pressure in the supply line to be used to automatically fill the closed system.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß

  • (e) die Steueranordnung einen Differenzdruckgeber enthält, der einerseits von dem Druck am Ausgang des Druckminderers und andererseits vom Druck in dem Heizungssystem beaufschlagt ist,
  • (f) der Stellantrieb für den Rohrtrenner von dem Differenzdruckgeber derart steuerbar ist, daß
    • -der Rohrtrenner bei einem ersten Druck in der Heizungsanlage, der dem Druck am Ausgang des Druckminderers entspricht, in seine Ruhestellung bewegt wird und
    • -der Rohrtrenner bei einem zweiten Druck in der Heizungsanlage, der niedriger als der erste Druck ist, in seine Betriebsstellung vorbewegbar ist.
According to the invention the object is achieved in that
  • (e) the control arrangement contains a differential pressure transmitter which is acted upon on the one hand by the pressure at the outlet of the pressure reducer and on the other hand by the pressure in the heating system,
  • (f) the actuator for the pipe separator can be controlled by the differential pressure transmitter such that
    • -the pipe separator is moved into its rest position at a first pressure in the heating system, which corresponds to the pressure at the outlet of the pressure reducer, and
    • the pipe separator can be moved into its operating position at a second pressure in the heating system which is lower than the first pressure.

Die erfindungsgemäß ausgebildete Fülleinrichtung stellt eine einheitliche Baugruppe dar, die mittels des Rohrtrenners eine Verbindung zwischen der Versorgungsleitung und der geschlossenen Anlage herstellt. Diese Baugruppe kann ständig in Verbindung mit der Versorgungsleitung und der geschlossenen Anlage belassen bleiben, ohne daß die Gefahr besteht, daß das Füllmedium aus der geschlossenen Anlage in die Versorgungsleitung zurückgedrückt wird. Die Zwischenschaltung des von der Steueranordnung gesteuerten Rohrtrenners bewirkt eine sichere Abtrennung der Versorgungsleitung von der geschlossenen Anlage, wenn deren vorbestimmter Innendruck erreicht ist. Durch den Rohrtrenner wird zusätzlich zu dem Rückflußverhinderer eine Sicherheit dagegen geschaffen, daß aus der gefüllten Anlage Füllmedium in die Versorgungsleitung zurückgedrückt wird, falls der Druck in der Versorgungsleitung unter den in der gefüllten Anlage herrschenden Innendruck absinkt.The filling device designed according to the invention represents a unitary assembly which uses the pipe separator to establish a connection between the supply line and the closed system. This module can always be left in connection with the supply line and the closed system without the risk that the filling medium is pressed back out of the closed system into the supply line. The interposition of the pipe separator controlled by the control arrangement brings about a reliable separation of the supply line from the closed system when its predetermined internal pressure has been reached. In addition to the backflow preventer, the pipe separator ensures that filling medium is pressed back into the supply line from the filled system if the pressure in the supply line drops below the internal pressure prevailing in the filled system.

Vorteilhafte Ausbildungen und Weiterbildungen der Fülleinrichtung nach der Erfindung sind in den Unteransprüchen gekennzeichnet.Advantageous developments and developments of the filling device according to the invention are characterized in the subclaims.

Ein Ausführungsbeispiel der erfindungsgemäßen Fülleinrichtung ist nachstehend unter Bezugnahme auf die Zeichnung im einzelnen beschrieben.An embodiment of the filling device according to the invention is described in detail below with reference to the drawing.

Die Abbildung zeigt einen Längsschnitt durch das Ausfüshrungsbeispiel der Fülleinrichtung. Diese besteht aus einem im wesentlichen konventionell aufgebauten Druckminderer, der allgemein mit 1 bezeichnet ist. Dieser Druckminderer ist auf einen Druck eingestellt, der auf den vorbestimmten Innendruck oder Fülldruck der geschlossenen Anlage abgestimmt ist. Der Aufbau des Druckminderers 1 und dessen Funktion und Einstellung sind bekannt und werden daher nicht im einzelnen beschrieben. An der Eingangsseite ist der Druckminderer mit einem Anschlußstutzen 2 versehen, an dem mittels einer Überwurfmutter 3 ein Anschlußstück 4 befestigt ist, mittels dessen der Druckminderer 1 bleibend an eine nicht dargestellte Versorgungsleitung angeschlossen werden kann. An der gegenüberliegenden Ausgangsseite des Druckminderers 1 ist ein Ansatz 5 fest mit dem Druckminderer 1 verbunden, der den weiter unten beschriebenen Rohrtrenner aufnimmt. In das freie Ende 6 des Ansatzes 5 ist ein allgemein mit 7 bezeichneter Rückflußverhinderer mittels eines Anschlußteils 8 eingesetzt. Der Rückflußverhinderer 7 trägt am anderen Ende an einem Anschlußstutzen 9 eine Überwurfmutter 10, durch die ein Anschlußstück 11 gehaltert wird, mittels dessen die gesamte Fülleinrichtung als einheitliche Armatur bleibend an die nicht dargestellte geschlossene Anlage angeschlossen werden kann. Der Rückflußverhinderer 7 enthält einen federbelasteten Schließkörper der durch die Federbelastung in schließender Anlage an einem Sitz gehalten wird und den Rückflußverhinderer 7 gegen den Ansatz 5 und damit gegen den Druckminderer 1 absperrt. Das Anschlußteil 8 des Rückflußverhinderers 7 enthält eine Umgehungsleitung 13, die den Schließkörper 12 umgeht und in eine Ringkammer 14 mündet, in der somit der Innendruck der geschlossenen Anlage herrscht.The illustration shows a longitudinal section through the exemplary embodiment of the filling device. This consists of an essentially conventionally constructed pressure reducer, which is generally designated 1. This pressure reducer is set to a pressure which is matched to the predetermined internal pressure or filling pressure of the closed system. The structure of the pressure reducer 1 and its function and setting are known and are therefore not described in detail. On the input side, the pressure reducer is provided with a connecting piece 2, to which a connecting piece 4 is fastened by means of a union nut 3, by means of which the pressure reducer 1 can be permanently connected to a supply line, not shown. On the opposite output side of the pressure reducer 1, a shoulder 5 is fixedly connected to the pressure reducer 1, which receives the pipe separator described below. In the free end 6 of the neck 5, a backflow preventer, generally designated 7, is inserted by means of a connecting part 8. The backflow preventer 7 carries at the other end on a connecting piece 9 a union nut 10, through which a connector 11 is held, by means of which the entire filling device can be permanently connected as a uniform fitting to the closed system, not shown. The backflow preventer 7 contains a spring-loaded closing body which is held against the seat by the spring load in the closing system and which blocks the backflow preventer 7 against the shoulder 5 and thus against the pressure reducer 1. The connecting part 8 of the backflow preventer 7 contains a bypass line 13 which bypasses the closing body 12 and opens into an annular chamber 14, in which the internal pressure of the closed system therefore prevails.

In den Ansatz 5 ist von der geschlossenen Anlage her gesehen vor dem Abschlußteil 8 des Rückflußverhinderers 7 eine Trennstelle 15 eingebaut, die eine visuelle Überprüfung des Zwischenraums zwischen dem weiter unten beschriebenen Rohrtrenner 20 und dem Rückflußverhinderer 7 ermöglicht und in üblicher und daher in nicht besonders beschriebener Weise ausgebildet ist. Im Bereich der Trennstelle 15 zweigt von dem Ansatz 5 ein Leckabflußrohr 16 ab, das in üblicher Weise an eine vorhandene Entsorgungsleitung angeschlossen ist.In the approach 5 is seen from the closed system in front of the end part 8 of the check valve 7, a separation point 15 is installed, which allows a visual inspection of the space between the pipe separator 20 described below and the check valve 7 and in the usual and therefore not particularly described Is trained. In the area of the separation point 15, a leak drain pipe 16 branches off from the attachment 5 and is connected in a conventional manner to an existing disposal line.

Der Druckminderer 1 trägt weiterhin an einer Seite eine nicht besonders gekennzeichnete Einstellvorrichtung üblicher Bauart zur Einstellung eines Ausgangsdrucks, der auf den vorbestimmten Innendruck oder Fülldruck der geschlossenen Anlage abgestimmt ist. An der gegenüberliegenden Seite trägt der Druckminderer 1 eine weiter unten im einzelnen beschriebene Steueranordnung 40 zur Steuerung des Rohrtrenners 20.The pressure reducer 1 also carries on one side a not particularly marked setting device of conventional design for setting an outlet pressure which is matched to the predetermined internal pressure or filling pressure of the closed system. On the opposite side, the pressure reducer 1 carries a control arrangement 40, described in detail below, for controlling the pipe separator 20.

Der Ansatz 5 des Druckminderers 1 ist so ausgebildet, daß er als Gehäuse für den Rohrtrenner 20 dient. Dieser Rohrtrenner 20 besteht aus einem einseitig geschlossenen Rohr 21, das an dem Druckminderer 1 abdichtend in den Ansatz 5 eingesetzt ist. Am geschlossenen Ende des Rohres 21 sind in dessen Seitenwand Durchgangsöffnungen 22 ausgebildet, von denen drei in der Abbildung erkennbar sind. Auf dem Rohr 21 ist ein ringförmiger Kolben 23 gegen die Kraft einer Feder 24 verschiebbar. Der Kopf 25 des ringförmigen Kolbens 23 ist dem Druckminderer 1 zugekehrt; die Feder 24 wirkt auf die dem Druckminderer 1 abgekehrte Seite des Kopfes 25 und stützt sich an einem Widerlager 26 ab, das in der Nähe der Trennstelle 15 an dem Ansatz 5 gehaltert ist. Der ringförmige Kolben 23 weist weiter in seiner Wandung eine Ausnehmung 27 auf und bildet zwischen der Ausnehmung 27 und den Durchgangsöffnungen 22 in dem einseitig geschlossenen Rohr 21 einen Ringspalt 28.The approach 5 of the pressure reducer 1 is designed so that it serves as a housing for the pipe separator 20. This pipe separator 20 consists of a pipe 21 which is closed on one side and which is inserted in a sealing manner in the attachment 5 on the pressure reducer 1. At the closed end of the tube 21 through openings 22 are formed in its side wall, three of which can be seen in the figure. An annular piston 23 is displaceable on the tube 21 against the force of a spring 24. The head 25 of the annular piston 23 faces the pressure reducer 1; the spring 24 acts on the side of the head 25 facing away from the pressure reducer 1 and is supported on an abutment 26, which in the vicinity of the separation point 15 is held on the approach 5. The annular piston 23 also has a recess 27 in its wall and forms an annular gap 28 between the recess 27 and the through openings 22 in the tube 21 which is closed on one side.

Der Rohrtrenner 20 ist in der Abbildung in seiner Schließstellung dargestellt. In dieser Stellung liegt der ringförmige Kolben 23 dem einseitig geschlossenen Rohr 21 abdichtend an, so daß die Durchgangsöffnungen 22 des Rohres 21 geschlossen sind. Das Anschlußteil 8 des Rückflußverhinderers 7 enthält an der dem Rohrtrenner 20 gegenüberliegenden Seite eine Ausnehmung 29, die an den ringförmigen Kolben 23 des Rohrtrenners 20 angepaßt ist und diesen in dessen zweiter oder geöffneter Stellung aufnimmt. Die Ausnehmung 29 ist mit Dichtmitteln 30 versehen, mittels derer der ringförmige Kolben 23 in der zweiten oder geöffneten Stellung abdichtend in die Ausnehmung 29 eingeführt ist.The pipe separator 20 is shown in its closed position in the figure. In this position, the annular piston 23 lies in a sealing manner against the tube 21, which is closed on one side, so that the through openings 22 of the tube 21 are closed. The connecting part 8 of the backflow preventer 7 contains, on the side opposite the pipe separator 20, a recess 29 which is adapted to the annular piston 23 of the pipe separator 20 and receives it in its second or open position. The recess 29 is provided with sealing means 30, by means of which the annular piston 23 is sealingly inserted into the recess 29 in the second or open position.

Die Steueranordnung 40 besteht im wesentlichen aus Steuerventilen und einem Differenzdruckgeber zur Steuerung der Steuerventile; die Steueranordnung 40 ist an der der Einstellvorrichtung gegenüberliegenden Seite an dem Druckminderer 1 angeordnet.The control arrangement 40 consists essentially of control valves and a differential pressure transmitter for controlling the control valves; the control arrangement 40 is arranged on the pressure regulator 1 on the side opposite the adjusting device.

Der Differenzdruckgeber 41 besteht im wesentlichen aus zwei Kammern 42, 43, die durch eine bewegliche Wand 44 in Gestalt einer Membran voneinander getrennt sind. Die dem Druckminderer 1 abgekehrte Kammer 42 ist über eine gestrichelt gezeichnete Verbindungsleitung 45 an die Ausgangsseite des Druckminderers 1 angeschlossen. Die Kammer 43 ist über eine gestrichelt gezeichnete Verbindungsleitung 46 an den Ringkanal 14 im Anschlußteil 8 des Rückflußverhinderers 7 angeschlossen. Der Differenzdruckgeber 41 ist durch eine Überwurfmutter 47 an einem weiteren Ansatz 48 des Druckminderers 1 abdichtend befestigt.The differential pressure transmitter 41 essentially consists of two chambers 42, 43 which are separated from one another by a movable wall 44 in the form of a membrane. The chamber 42 facing away from the pressure reducer 1 is connected to the outlet side of the pressure reducer 1 via a connecting line 45 shown in broken lines. The chamber 43 is connected to the ring channel 14 in the connecting part 8 of the check valve 7 via a connecting line 46 shown in broken lines. The differential pressure sensor 41 is fastened in a sealing manner to a further extension 48 of the pressure reducer 1 by means of a union nut 47.

Die bewegliche Wand 44 trägt einen Teller 49, an dem eine Steuerstange 50 befestigt ist, die durch einen Dichtkörper 51 abdichtend in das Innere des weiteren Ansatzes 48 verläuft.The movable wall 44 carries a plate 49 to which a control rod 50 is fastened, which extends sealingly into the interior of the further extension 48 through a sealing body 51.

Im Inneren des Druckminderers 1 ist an dessen Ausgangsseite in dem weiteren Ansatz 48 ein Ventilsitzkörper 52 ausgebildet. An dem Ventilsitzkörper 52 befindet sich an der dem Druckdifferenzgeber 41 abgekehrten Seite ein Ventilsitz 53 eines Steuerventils mit einem federbelasteten Ventilkörper 54. Der Ventilkörper 54 wird durch eine Druckfeder, die sich an einem gegenüberliegenden Teil des Druckminderers 1, im Ausführungsbeispiel an dessen Einsitzventil, abstützt, in schließender Anlage an seinem Ventilsitz 53 gehalten. An der dem Differenzdruckgeber 41 zugekehrten Seite des Ventilsitzkörpers 52 befindet sich ein Ventilsitz 55 eines Entlastungsventils mit einem federbelasteten Ventilkörper 56. Der Ventilkörper 56 steht unter Wirkung einer Zugfeder, die an dem Ventilsitzkörper 52 angeordnet ist und den Ventilkörper 56 in schließender Anlage an seinem Ventilsitz 55 hält. Durch den Ventilsitzkörper 52 hindurch erstreckt sich eine Axialbohrung 57, von der zwischen den Ventilsitzen 53 und 55 eine Steuerleitung 58 abzweigt, die die Axialbohrung 57 und einen Ringraum des Ansatzes 5 verbindet und an einer im Kopf 25 des ringförmigen Kolbens 23 des Rohrtrenners 20 gegenüberliegenden Seite in den Ringraum 60 einmündet. Auf der Höhe des Ventilsitzes 55 des Entlastungsventils erstreckt sich aus dem weiteren Ansatz 48 eine Entlastungsleitung 59, die im wesentlichen parallel zur Steuerleitung 58 und zum Ansatz 5 verläuft und sich zum Leckabflußrohr 16 hin erstreckt.A valve seat body 52 is formed in the interior of the pressure reducer 1 on the outlet side thereof in the further extension 48. A valve seat 53 of a control valve with a spring-loaded valve body 54 is located on the valve seat body 52 on the side facing away from the pressure difference transmitter 41. The valve body 54 is supported by a compression spring which is supported on an opposite part of the pressure reducer 1, in the exemplary embodiment on its single-seat valve. held in closing system on its valve seat 53. On the side of the valve seat body 52 facing the differential pressure transmitter 41 there is a valve seat 55 of a relief valve with a spring-loaded valve body 56. The valve body 56 is under the action of a tension spring which is arranged on the valve seat body 52 and the valve body 56 in a closed contact with its valve seat 55 holds. An axial bore 57 extends through the valve seat body 52, from which a control line 58 branches off between the valve seats 53 and 55, which connects the axial bore 57 and an annular space of the extension 5 and on a side opposite in the head 25 of the annular piston 23 of the pipe separator 20 opens into the annular space 60. At the level of the valve seat 55 of the relief valve, a relief line 59 extends from the further extension 48, which extends essentially parallel to the control line 58 and extension 5 and extends to the leakage drain pipe 16.

Die Steuerstange 50 des Differenzdruckgebers 41 erstreckt sich abdichtend, aber gleitbeweglich durch den Ventilkörper 56 und den Ventilsitz 55 des Entlastungsventils und durch die Axialbohrung 57 des Ventilsitzkörpers 52 hindurch und trägt an ihrem freien Ende einen Steuerkörper 61, der mit dem Ventilkörper 54 des Steuerventils zusammenwirkt.The control rod 50 of the differential pressure sensor 41 extends sealingly but slidably through the valve body 56 and the valve seat 55 of the relief valve and through the axial bore 57 of the valve seat body 52 and carries at its free end a control body 61 which cooperates with the valve body 54 of the control valve.

Die vorstehend beschriebene Fülleinrichtung arbeitet wie folgt:The filling device described above works as follows:

In der Abbildung sind die Fülleinrichtung und der Rohrtrenner 20 in ihrer Schließstellung dargestellt. Dementsprechend ist der Rückflußverhinderer 7 durch den Schließkörper 12 gegen den Ansatz 5 bzw. das Druckmindererventil 1 geschlossen. Eventuell am Schließkörper 12 austretendes Füllmedium wird durch das Leckabflußrohr 16 abgeleitet. Der ringförmige Kolben 23 ist unter der Wirkung der Feder 24 in die zarückgezogene Stellung eingebracht, in der er die Durchgangsöffnungen 22 des einseitig geschlossenen Rohres 21 im Rohrtrenner 20 verschließt. Der Innendruck oder Fülldruck der geschlossenen Anlage ist dem Ausgangsdruck des Druckminderers 1 gleich, und daher sind auch die in den Kammern 42 und 43 des Differenzdruckgebers 41 herrschenden Drücke gleich. Die Steuerstange 51 befindet sich somit in ihrer zurückgezogenen Stellung und der Ventilkörper 54 des Steuerventils an der Ausgangsseite des Druckminderers 1 liegt dem Ventilsitz 53 schließend an. Die Steuerleitung 58 und der Innenraum des Ansatzes 5 sind drucklos, so daß auch der Ventilkörper 56 des Entlastungsventils dessen Ventilsitz 55 schließend anliegt.The figure shows the filling device and the pipe separator 20 in their closed position. Accordingly, the backflow preventer 7 is closed by the closing body 12 against the attachment 5 or the pressure reducing valve 1. Any filling medium escaping from the closing body 12 is drained off through the leakage drain pipe 16. The annular piston 23 is brought under the action of the spring 24 into the retracted position in which it closes the through openings 22 of the tube 21 closed on one side in the tube separator 20. The internal pressure or filling pressure of the closed system is the same as the outlet pressure of the pressure reducer 1, and therefore the pressures prevailing in the chambers 42 and 43 of the differential pressure sensor 41 are also the same. The control rod 51 is thus in its retracted position and the valve body 54 of the control valve on the output side of the pressure reducer 1 is in contact with the valve seat 53. The control line 58 and the interior of the extension 5 are depressurized, so that the valve body 56 of the relief valve, the valve seat 55 of which is in close contact.

Wenn aus irgendwelchen Gründen, z.B. infolge einer Entlüftung, der Druck des Füllmediums in der geschlossenen Anlage abnimmt, tritt diese Druckabnahme über die Umgehungsleitung 13 und die Ringkammer 14 sowie die Verbindungsleitung 46 auch in der Kammer 43 des Differenzdruckgebers 41 auf. Infolgedessen verschieben sich die mit der beweglichen Wand 44 gekoppelte Steuerstange 50, so daß der Ventilkörper 54 des Steuerventils von seinem Sitz 53 abgehoben wird. Von der Ausgangsseite des Druckmindererventils 1 tritt daher unter Fülldruck stehendes Füllmedium in die Steuerleitung 58 ein und übt einen Druck auf den Kopf 25 des ringförmigen Kolbens 23 aus. Wenn dieser Druck die Kraft der Feder 24 überwindet, wird der ringförmige Kolben 23 in die Ausnehmung 29 des Anschlußteils 8 des Rückflußverhinderers 7 verschoben. Durch diese Verschiebung kann Füllmedium durch den Druckminderer 1 und das einseitig geschlossene Rohr 21 und dessen Durchgangsöffnungen 22 hindurch in den Innenraum des ringförmigen Kolbens 23 übertreten und von da durch die Ausnehmung 29 im Anschlußteil 8 des Rückflußverhinderers 7 unter Verstellung dessen Schließkörpers 12 in die geschlossene Anlage fließen. Der Füllvorgang dauert an bis Druckausgleich zwischen der Ausgangsseite des Druckminderers 1 und dem Innendruck der geschlossenen Anlage hergestellt ist. Während des Füllvorgangs bleibt der Ventilkörper 56 des Entlastungsventils, in dem die Steuerstange 50 abdichtend gleitbeweglich verschiebbar ist, in der dargestellten Stellung, d.h. in schließender Anlage an dem Ventilsitz 55 des Entlastungsventils.If, for any reason, for example due to a vent, the pressure of the filling medium in the closed system decreases, this decrease in pressure occurs via the bypass line 13 and the annular chamber 14 and the connecting line 46 also in the chamber 43 of the differential pressure sensor 41. As a result, the control rod 50 coupled to the movable wall 44 moves, so that the valve body 54 of the control valve is lifted off its seat 53. From the outlet side of the pressure reducing valve 1, filling medium under filling pressure therefore enters the control line 58 and exerts a pressure on the head 25 of the annular piston 23. When this pressure overcomes the force of the spring 24, the annular piston 23 is moved into the recess 29 of the connecting part 8 of the check valve 7. Through this ver shift can fill medium through the pressure reducer 1 and the one-sided pipe 21 and its through openings 22 pass into the interior of the annular piston 23 and from there flow through the recess 29 in the connecting part 8 of the check valve 7 with adjustment of the closing body 12 in the closed system. The filling process continues until pressure equalization between the outlet side of the pressure reducer 1 and the internal pressure of the closed system is established. During the filling process, the valve body 56 of the relief valve, in which the control rod 50 can be displaceably moved in a sealing manner, remains in the position shown, that is to say in a closed contact with the valve seat 55 of the relief valve.

Bei Eintritt des Druckausgleichs schließt der Schließkörper 12 des Rückflußverhinderers 7; weiterhin besteht Druckgleichheit in den beiden Kammern 42, 43 des Differenzdruckgebers 41, so daß die Steuerstange 50 mit dem Steuerkörper 61 zurückgezogen und das Steuerventil durch Anlage des federbelasteten Ventilkörpers 54 an den Ventilsitz 53 geschlossen wird. Der federbelastete Ventilkörper 56 des Entlastungsventils wird unter der Wir kung des Ausgangsdrucks des Druckminderers 1 in der Steuerleitung 58 und dem Ringraum 60 im Ansatz 5 von seinem Ventilsitz 55 gegen die Kraft seiner Zugfeder abgehoben und auf der Steuerstange 50 bis zur Anlage an die dem Ventilsitzkörper 52 zugekehrte Stirnfläche des Dichtkörpers 51 verschoben. Das Füllmedium kann dann durch die Axialbohrung 57 und den Ventilsitz 55 des Entlastungsventils am Ventilsitzkörper 52 in die Entlastungsleitung 59 abströmen und die Feder 24 bewirkt die Rückstellung des ringförmigen Kolbens 23. Nach Rückstellung des ringförmigen Kolbens 23 und Druckausgleich in der Steuerleitung 58 wird der Ventilkörper 56 des Entlastungsventils wieder in schließende Anlage an seinen Ventilsitz 55 gebracht, so daß die Fülleinrichtung wieder die in der Abbildung dargestellte Schließstellung einnimmt. In dieser Schließstellung ist es ausgeschlossen, daß ein Druckabfall in der an das Anschlußstück 4 angeschlossenen Versorgungsleitung einen Übertritt von Füllmedium durch den Rückflußverhinderer 7 in die Versorgungsleitung bewirkt, da der Rohrtrenner 20 den Druckminderer 1 wirksam gegen aus dem Rückflußverhinderer 7 austretendes Füllmedium abschließt und andererseits gegebenenfalls austretendes Füllmedium durch das Leckabflußrohr 16 abgeleitet wird.When pressure equalization occurs, the closing body 12 of the non-return valve 7 closes; there is also equality of pressure in the two chambers 42, 43 of the differential pressure sensor 41, so that the control rod 50 with the control body 61 is retracted and the control valve is closed by the spring-loaded valve body 54 against the valve seat 53. The spring-loaded valve body 56 of the relief valve is lifted under the effect of the output pressure of the pressure reducer 1 in the control line 58 and the annular space 60 in the neck 5 from its valve seat 55 against the force of its tension spring and on the control rod 50 until it abuts against the valve seat body 52 facing end face of the sealing body 51 shifted. The filling medium can then flow out through the axial bore 57 and the valve seat 55 of the relief valve on the valve seat body 52 into the relief line 59 and the spring 24 brings about the resetting of the annular piston 23. After resetting the annular piston 23 and pressure compensation in the control line 58, the valve body 56 the relief valve is brought back into its closing system on its valve seat 55, so that the filling device again assumes the closed position shown in the figure. In this closed position, it is excluded that a pressure drop in the supply line connected to the connection piece 4 causes a transfer of filling medium through the backflow preventer 7 into the supply line, since the pipe separator 20 effectively closes the pressure reducer 1 against filling medium escaping from the backflow preventer 7 and, on the other hand, if necessary escaping filling medium is discharged through the leak drain pipe 16.

Es sind verschiedene Abwandlungen von dem dargestellten Ausführungsbeispiel möglich. So kann der Rohrtrenner 20 unter Umständen auch ein von dem Druckminderer 1 getrenntes Teil bilden, das mit konventionellen Verbindungsmitteln an die Ausgangsseite des Druckminderers 1 angeschlossen ist. Auch kann die Kammer 43 des Differenzdruckgebers 41 in jeder anderen denkbaren Weise so verbunden werden, daß in dieser Kammer der in der geschlossenen Anlage jeweils herrschende Innendruck oder Fülldruck anliegt. Die Entlastungsleitung 59 kann auch getrennt von dem Ansatz 5 zum Leckabflußrohr 16 geführt sein. Schließlich ist die Anordnung der verschiedenen Ansätze und Anschlußstutzen beliebig und braucht nicht kreuzweise gegenüberliegend zu sein wie in dem dargestellten Ausführungsbeispiel.Various modifications of the illustrated embodiment are possible. Thus, the pipe separator 20 can under certain circumstances also form a part which is separate from the pressure reducer 1 and which is connected to the outlet side of the pressure reducer 1 using conventional connecting means. The chamber 43 of the differential pressure sensor 41 can also be connected in any other conceivable way so that the internal pressure or filling pressure prevailing in the closed system is present in this chamber. The relief line 59 can also be routed separately from the attachment 5 to the leak drain pipe 16. Finally, the arrangement of the different lugs and connecting pieces is arbitrary and does not need to be opposite one another in a crosswise manner as in the exemplary embodiment shown.

Claims (5)

1. Filling device for introducing fresh water into a closed heating installation, comprising
(a) a pressure reductor (1) connected on the inlet side to a fresh water conduction,
(b) a tube separator (20) connected to the outlet side of the pressure reductor (1) and having a water-carrying movable member (23),
- which in a first operative position is advanced and establishes a connection between a fresh water outlet (22) communicating with the outlet of the pressure reductor (1) and the heating installation, bridging a point of separation (15),
- which, in a resting position, ends upstream from the point of separation and closes the fresh water outlet (22), and
- which is displaceable by a servomotor to which is applied the fresh water pressure from the resting position to the operative position,
(c) a backflow preventor (7.) arranged downstream from the tube separator (20) and the point of separation (15) and connected to an inlet of the heating system, and
(d) a control arrangement (40) arranged to control the application of the fresh water pressure to the servomotor,
characterized in that
(e) the control arrangement (40) comprises a differential pressure sensor (41) on which is applied, on one side, the pressure from the outlet of the pressure reductor (1) and, on the other side, the pressure in the heating system,
(f) the servomotor for the tube separator (20) is arranged to be controlled by the differential pressure sensor (41) such that
- the tube separator (20) is moved, with a first pressure in the heating installation which is equal to the pressure at the outlet of the pressure reductor, to its resting position, and
- the tube separator (20) is arranged to be advanced to its operative position with a second pressure in the heating installation which is less than the first pressure.
2. Filling arrangement as set forth in claim 1, characterized in that
(a) the servomotor has a setting piston (23) which defines a control pressure chamber and to which is applied the fresh water pressure through a control valve (54) such that the water-carrying movable member is advanced, and which is charged by a pressure spring (24) such that the water-carrying movable member is returned to its resting position,
(b) the control valve (54) is controlled such that, by the pressure of the heating system acting at the differential pressure sensor, it closes and by the pressure at the outlet of the pressure reductor (1) acting at the differential pressure sensor, it opens.
3. Filling arrangement as set forth in claim 2, characterized in that
(a) the differential pressure sensor (41) has a diaphragm housing divided by a diaphragm (44) into a first diaphragm chamber (42) and a second diaphragm chamber (43),
(b) the first diaphragm chamber (42) is connected to the outlet of the pressure reductor (1) and the second diaphragm (43) to the heating system,
(c) a control rod (50) is connected to the diaphragm (44) on the side of the second diaphragm chamber (43) and is engaged by force to a valve disc of the control valve (54).
4. Filling arrangement as set forth in claim 3, characterized in that
(a) the control arrangement has a relief valve (56) through which the control pressure chamber (60) of the servomotor is arranged to be connected to an outlet conduit (59), and
(b) the relief valve (56) is kept by the control rod in its closing position when the control rod (50) carries out a stroke for opening the control valve (54), and is opened when the control rod (50) is moved back with the diaphragm (44) such that the relief valve (56) is adapted to be pressed open by the pressure in the control chamber (60) and permits the control piston (23) to return by the action of the pressure spring (24).
5. Filling arrangement as set forth in claim 3 or 4, characterized in that
(a) the control piston (23) is an annular piston which is guided on the outside in a cylinder and on the inside by a tube (21), which tube is connected at one end to the outlet of the pressure reductor (1) and which is closed at the other end,
(b) the tube has lateral outlets (22),
(c) the water-carrying movable member (23) is a sleeve
- which is connected to the setting piston (23),
- which is displaceably guided on the tube and is introduceable with its end over the point of separation (15) sealingly into a receiver (29) on the heating system side, and
- which has an annular recess (27) through which the lateral outlets (22) of the tube communicate with the bore of the sleeve when the sleeve in the operative position is introduced with its end into the receiver (29).
EP85111774A 1984-09-25 1985-09-18 Filling arrangement for filling closed liquid heating circuits Expired - Lifetime EP0179271B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111774T ATE51955T1 (en) 1984-09-25 1985-09-18 FILLING DEVICE FOR FILLING CLOSED PLANTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3435127 1984-09-25
DE19843435127 DE3435127A1 (en) 1984-09-25 1984-09-25 FILLING DEVICE FOR FILLING CLOSED SYSTEMS

Publications (3)

Publication Number Publication Date
EP0179271A2 EP0179271A2 (en) 1986-04-30
EP0179271A3 EP0179271A3 (en) 1988-01-07
EP0179271B1 true EP0179271B1 (en) 1990-04-11

Family

ID=6246291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111774A Expired - Lifetime EP0179271B1 (en) 1984-09-25 1985-09-18 Filling arrangement for filling closed liquid heating circuits

Country Status (3)

Country Link
EP (1) EP0179271B1 (en)
AT (1) ATE51955T1 (en)
DE (2) DE3435127A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0972995A1 (en) * 1998-07-16 2000-01-19 Hans Sasserath & Co Kg Filling armature for filling a closed hot water heating system
NL1017198C1 (en) * 2001-01-26 2002-07-29 Jan Henk Cnossen Liquid heating.
DE10308838A1 (en) * 2003-02-27 2004-09-09 Hans Sasserath & Co. Kg Valve arrangement for a pipe separator
DE102005006790B4 (en) * 2005-02-14 2007-06-06 Hans Sasserath & Co. Kg Valve arrangement with pressure-dependent controlled valve
GB0607319D0 (en) * 2006-04-12 2006-05-24 Gledhill Water Storage Improvements to water heating systems
GB2528912A (en) * 2014-08-02 2016-02-10 Robert Foster Mechanical filling device 19

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018852A1 (en) * 1970-04-20 1971-11-04 Marx, Heinrich, 6365 Ober-Rosbach; Schubert, Werner, 6376 Oberhöchstadt Automatic filling device for heating and pressure systems with double backflow prevention
DE2445200C2 (en) * 1974-09-21 1982-12-23 Honeywell-Braukmann GmbH, 6950 Mosbach Filling fittings, in particular for heating systems
DE3007454A1 (en) * 1980-02-28 1981-09-10 Hans Sasserath & Co Kg, 4052 Korschenbroich Heating system filling valve - has hand-controlled by=pass across pressure-reducing valve and reverse-flow prevention device
DE3020797A1 (en) * 1980-05-31 1981-12-17 Hans Sasserath & Co Kg, 4052 Korschenbroich THERMALLY CONTROLLED SAFETY DEVICE FOR BOILERS IN CLOSED HEATING SYSTEMS

Also Published As

Publication number Publication date
DE3577136D1 (en) 1990-05-17
EP0179271A2 (en) 1986-04-30
DE3435127A1 (en) 1986-04-03
EP0179271A3 (en) 1988-01-07
ATE51955T1 (en) 1990-04-15

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