EP0185943B1 - Pump unit for cryogenic fluids - Google Patents

Pump unit for cryogenic fluids Download PDF

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Publication number
EP0185943B1
EP0185943B1 EP85114879A EP85114879A EP0185943B1 EP 0185943 B1 EP0185943 B1 EP 0185943B1 EP 85114879 A EP85114879 A EP 85114879A EP 85114879 A EP85114879 A EP 85114879A EP 0185943 B1 EP0185943 B1 EP 0185943B1
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EP
European Patent Office
Prior art keywords
distributor block
connecting means
pump
pump unit
high pressure
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
EP85114879A
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German (de)
French (fr)
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EP0185943A3 (en
EP0185943A2 (en
Inventor
Jean Tornare
Klaus Bofinger
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Fives Cryomec AG
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Cryomec AG
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Priority to AT85114879T priority Critical patent/ATE57239T1/en
Publication of EP0185943A2 publication Critical patent/EP0185943A2/en
Publication of EP0185943A3 publication Critical patent/EP0185943A3/en
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Publication of EP0185943B1 publication Critical patent/EP0185943B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/1035—Disc valves with means for limiting the opening height
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points

Definitions

  • cryogenic fluids are used when filling commercial steel bottles containing gases such as nitrogen under high pressure.
  • gases such as nitrogen under high pressure.
  • the nitrogen is initially in a frozen, liquid state in a heat-insulated storage tank. As long as the nitrogen is kept frozen at about -196 °, the overpressure in the storage tank is only about 2 atm.
  • the nitrogen is at ambient temperature under a pressure of 200 atm.
  • the task of the cryogenic pump is to bring the liquid, frozen medium to a pressure of around 200 atm, so that it can be filled into the steel bottles after passing through an evaporator. So that the pump can pump liquid medium, it must have the temperature of the frozen medium itself.
  • T is a heat-insulated storage tank which contains liquid nitrogen
  • P is the cryogenic pump
  • V is an evaporator
  • F is a battery with bottles which are to be filled under high pressure.
  • valves 1 and 3 are first opened so that liquid medium flows into the pump and valve 3 allows gaseous medium to escape into the open. If the temperature approaches the working temperature, valve 3 can be closed and 4 opened, whereby gaseous medium flows back into the tank T. During this cooling process, valve 2 remains closed and the pump is out of operation.
  • a low-pressure safety valve 5 is provided for safety reasons.
  • the reference numbers 6 indicate expansion pieces (bellows) to which the connection of the lines to the pump is made.
  • valve 2 When the pump is started up, valve 2 is opened and the pump conveys liquid medium under high pressure.
  • a non-return valve 7, a high-pressure safety valve 8, a wind boiler 9, a pressure gauge 10, a differential pressure switch 11 and a second high-pressure safety valve 12 are arranged in the high-pressure line.
  • the evaporator V In the evaporator V the fluid is converted from the liquid to the gaseous state and reaches the bottles F under high pressure.
  • Known high-pressure piston pumps for cryogenic media usually have a cylinder integrally connected to a flange.
  • the flange primarily serves as a connecting element with the mechanical drive.
  • only a connection for a high-pressure line is provided on the flange, or a connection for a low-pressure supply line and for a gas discharge line.
  • GB-A-1 113 399 shows a cryogenic pump.
  • the high-pressure check valve is not located in the flange here, but at the lower end of the cylinder. Only a connection for the high pressure line is provided on the flange.
  • DE-A-1 528.363 shows a pump system in which three pumps are housed together in a thermally insulated container which is covered by an insulated bearing plate. The flanges of the individual pumps are attached to this bearing plate. Each individual pump is housed in an intermediate container attached to its flange. A control block is attached to the lower end of the pump cylinder and contains an inlet valve and a check valve. The flange of each individual pump is only provided with connections for inlet, outlet and ventilation.
  • the object of the invention is to simplify the assembly of the pump system, to make it cheaper and at the same time to improve the efficiency of the system.
  • the invention solves this problem with a pump unit which has the specific features of claim 1.
  • FIG. 2 shows the pump with its main components, namely a crankcase 20, an associated connecting piece 30 provided with ribs, the flange 40 designed as a distributor block, which is integrally connected to the pump cylinder 50, and a heat-insulating container 60 enclosing the effective parts of the pump
  • the ribs on the intermediate piece 30 serve to release the cold into the environment so that the lubricant of the drive parts does not harden.
  • the heat-insulating container 60 is double-walled and evacuated like a dewar.
  • the container 60 is closed at the top by the distributor block 40 which is integrated on its lower side with the pump cylinder 50. On the upper side, it merges into a central collar 41 which is penetrated by the piston rod 51.
  • this collar is provided with a thread, which establishes the connection with the drive part 20, 30. Further details of the distributor block can be seen in FIG. 3 and will be described later with reference to this figure.
  • FIG. 2 gives an overview of the fittings, which are partially installed in the distributor block, reference being made in part to FIGS. 3 and 4.
  • the fittings corresponding to the diagram according to FIG. 1 are indicated in FIGS. 2 and 3 with the same reference numbers.
  • the check valve 7 is attached in the manifold block itself.
  • an upwardly directed pipe 9 which functions as a wind boiler in the HP part, since it automatically fills with gas as a result of evaporation.
  • the HD safety valve 8 is placed on top of this tube.
  • a bore which is connected to the HD is connected via the connection 44 to a tube with a pressure gauge 10 and a differential pressure switch 11.
  • Figure 3 shows the distributor block on a larger scale in a view from the drive side.
  • the connecting collar 41 in the piston rod 51 which is guided in a slidingly sealed manner.
  • the actuation shaft 342 for the degassing valve 340 is led out through the stuffing box 45 and provided with a handle 341 at the top.
  • the gas return line to the storage tank is connected to one side of the distributor block by means of connection 46.
  • the line leading to the outside is connected on the opposite side by means of connection 47.
  • the LP safety valve 5 is connected to flange 48 and is omitted in FIG. 3 for the sake of clarity.
  • an automatic gas separator 70 is provided, which takes over its function when the three-way valve 340 is in the closed position and returns the gas forming in the vessel 60 to the storage tank T.
  • Figure 4 shows the pump of the unit of Figure 2 in section. It can be seen here how the parts already mentioned are installed or connected in or on the bores of the distributor block 40.
  • the degassing valve 340 and the check valve 7 of the high-pressure line are installed. Directly connected is the low-pressure safety valve 5, the wind boiler designed as a pipe section g with a high-pressure safety valve 8, the pressure gauge 10 and the differential pressure switch 11.
  • the suction valve 52 is located on the side of the pump cylinder 50 facing away from the distributor block 40.
  • Figure 5 shows the pump of another unit in section. It differs from the pump according to FIG. 4 in that the suction valve 52 is installed in the flange 400 designed as a distributor block.
  • a suction head 53 is attached to the outside of this side of the distributor block and is connected to the storage tank T by means of the expansion piece 6.
  • Return line 54 returns vaporous medium to the storage tank.
  • the already mentioned suction valve 52 and the high-pressure check valve 7 are installed in the distributor block 400. Furthermore, bores and connections are provided in the distributor block 400 for the tubular wind boiler 9 with the high-pressure safety valve 8, a connection 43 for the high-pressure line, and the high-pressure degassing valve 340, and low-pressure manometer 10. Furthermore, 400 bores are made in the manifold block (not visible in FIG. 5) for the direct connection of further fittings, such as high-pressure manometers, differential pressure switches etc.
  • the pump cylinder 500 which is integrally connected to the manifold block 400, is provided with a heat insulation material filled container 600 insulated against cold losses.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

1. A pump unit for cryogenic media with a high pressure piston pump of which the cylinder (50, 500) is connected integrally to a flange (40, 400), characterised in that this flange is constructed as a distributor block (40, 400) in which there are arranged recesses in which at least one high pressure nonreturn valve (7) and one low pressure vent valve (340) are fitted, while bores or channels arranged in the distributor block lead to connecting means (48) disposed externally on the distributor block, more specifically at least one connecting means (48) on which a low pressure safety valve (5) is directly mounted, also a connecting means on which a high pressure air chamber (9) with safety valve (8) is directly mounted, and in that further connecting means arranged externally on the distributor block are used for a high pressure line and a vapour return line.

Description

Beim Füllen von handelsüblichen Stahlflaschen, die Gase wie zum Beispiel Stickstoff unter hohem Druck enthalten, werden Pumpen für cryogene Fluiden verwendet. Der Stickstoff befindet sich zunächst in tiefgekühltem, flüssigen Zustand in einem wärmeisolierten Vorratstank. Solange der Stickstoff tiefgekühlt auf etwa -196° gehalten wird, beträgt der Ueberdruck im Vorratstank nur etwa 2 atü.Pumps for cryogenic fluids are used when filling commercial steel bottles containing gases such as nitrogen under high pressure. The nitrogen is initially in a frozen, liquid state in a heat-insulated storage tank. As long as the nitrogen is kept frozen at about -196 °, the overpressure in the storage tank is only about 2 atm.

In den Stahlflaschen dagegen, befindet sich der Stickstoff bei Umgebungstemperatur unter einem Druck von 200 atü. Die Aufgabe der cryogenen Pumpe besteht darin, das flüssige, tiefgekühlte Medium auf einen Druck von etwa 200 atü zu bringen, damit es nach dem Durchlauf durch einen Verdampfer in die Stahlflaschen abgefüllt werden kann. Damit die Pumpe flüssiges Medium pumpen kann muss sie selber die Temperatur des tiefgekühlten Medium aufweisen.In the steel bottles, however, the nitrogen is at ambient temperature under a pressure of 200 atm. The task of the cryogenic pump is to bring the liquid, frozen medium to a pressure of around 200 atm, so that it can be filled into the steel bottles after passing through an evaporator. So that the pump can pump liquid medium, it must have the temperature of the frozen medium itself.

Bevor die Pumpe in Betrieb genommen wird, muss sie zuerst auf die tiefe Temperatur des flüssigen Medium gebracht werden.Before the pump is put into operation, it must first be brought to the low temperature of the liquid medium.

Dies wird durch einleiten des flüssigen Mediums in den wärmeisolierten Pumpenteil bewerkstelligt, wobei das Medium zu "kochen" beginnt und in gasförmigen Zustand übergeht, der während des Abkühlprozesses abgelassen werden muss, damit flüssiges Medium nachströmen kann.This is accomplished by introducing the liquid medium into the heat-insulated pump part, whereby the medium begins to "boil" and changes into a gaseous state, which has to be drained off during the cooling process so that liquid medium can flow in again.

Bei bisherigen Pumpen waren dazu im Flansch zwischen dem isolierten Behälter und dem mechanischen Teil der Pumpe lediglich Bohrungen für den Einlass des flüssigen Fluids, für die Entlüftung des sich bildenden Gases und eine Bohrung für das unter hohem Druck zu verpumpenden flüssigen Medium vorgesehen. An diesen drei Bohrungen wurden ausserhalb der Pumpe die zur Inbetriebnahme und zum eigentlichen Pumpbetrieb erforderlichen Leitungen verlegt und Armaturen angebracht. Dies ist aus dem Schema nach Figur 1 ersichtlich an Hand dessen die Betriebsweise kurz erläutert wird.In previous pumps, only holes for the inlet of the liquid fluid, for venting the gas formed and a hole for the liquid medium to be pumped under high pressure were provided in the flange between the insulated container and the mechanical part of the pump. The lines required for commissioning and the actual pumping operation and fittings were installed on these three holes outside the pump. This can be seen from the diagram according to FIG. 1 on the basis of which the mode of operation is briefly explained.

In Figur 1 ist T ein wärmeisolierter Vorratstank der flüssigen Stickstoff enthält, P die cryogene Pumpe, V ein Verdampfer und F eine Batterie mit Flaschen die unter hohem Druck gefüllt werden sollen.In FIG. 1, T is a heat-insulated storage tank which contains liquid nitrogen, P is the cryogenic pump, V is an evaporator and F is a battery with bottles which are to be filled under high pressure.

Zur Erstellung der Betriebsbereitschaft der Pumpe P muss diese zuerst gekühlt werden. Dazu werden zunächst die Ventile 1 und 3 geöffnet damit flüssiges Medium in die Pumpe fliesst und durch Ventil 3 gasförmiges Medium ins Freie entweichen kann. Nähert sich die Temperatur der Arbeitstemperatur, kann Ventil 3 geschlossen und 4 geöffnet werden, wodurch gasförmiges Medium in den Tank T zurückströmt. Während dieses Abkühlvorganges bleibt Ventil 2 geschlossen und die Pumpe ist ausser Betrieb. Aus Sicherheitsgründen ist ein Niederdruck-Sicherheitsventil 5 vorgesehen. Die Bezugszahlen 6 deuten Expansionsstücke (Faltenbälge) an die die Verbindung der Leitungen zur Pumpe herstellen.To make pump P ready for operation, it must first be cooled. For this purpose, valves 1 and 3 are first opened so that liquid medium flows into the pump and valve 3 allows gaseous medium to escape into the open. If the temperature approaches the working temperature, valve 3 can be closed and 4 opened, whereby gaseous medium flows back into the tank T. During this cooling process, valve 2 remains closed and the pump is out of operation. A low-pressure safety valve 5 is provided for safety reasons. The reference numbers 6 indicate expansion pieces (bellows) to which the connection of the lines to the pump is made.

Wird die Pumpe in Betrieb genommen, wird Ventil 2 geöffnet und die Pumpe fördert flüssiges Medium unter hohem Druck. In der Hochdruckleitung ist ein Rückschlagventil 7 ein Hochdruck-Sicherheitsventil 8, ein Windkessel 9 ein Manometer 10 ein Differenzdruckschalter 11 und ein zweites HD-Sicherheitsventil 12 angeordnet. Im Verdampfer V wird das Fluid vom flüssigen in den gasförmigen Zustand umgewandelt und gelangt unter hohem Druck in die Flaschen F.When the pump is started up, valve 2 is opened and the pump conveys liquid medium under high pressure. A non-return valve 7, a high-pressure safety valve 8, a wind boiler 9, a pressure gauge 10, a differential pressure switch 11 and a second high-pressure safety valve 12 are arranged in the high-pressure line. In the evaporator V the fluid is converted from the liquid to the gaseous state and reaches the bottles F under high pressure.

Bekannte Hochdruck-Kolbenpumpen für cryogene Medien weisen meist einen, mit einem Flansch integral verbundenen Zylinder auf. Der Flansch dient dabei in erster Linie als Verbindungselement mit dem mechanischen Antrieb. Je nach Bauart ist am Flansch lediglich ein Anschluss für eine Hochdruckleitung vorgesehen oder auch ein Anschluss für eine Niederdruck-Zufuhrleitung und für eine Gas-Ablassleitung angebracht.Known high-pressure piston pumps for cryogenic media usually have a cylinder integrally connected to a flange. The flange primarily serves as a connecting element with the mechanical drive. Depending on the design, only a connection for a high-pressure line is provided on the flange, or a connection for a low-pressure supply line and for a gas discharge line.

Die GB-A-1 113 399 zeigt beispielsweise eine cryogene Pumpe. Das Hochdruck-Rückschlagventil ist hier nicht im Flansch, sondern am unteren Ende des Zylinders angeordnet. Am Flansch ist lediglich ein Anschluss für die Hochdruckleitung vorgesehen.GB-A-1 113 399, for example, shows a cryogenic pump. The high-pressure check valve is not located in the flange here, but at the lower end of the cylinder. Only a connection for the high pressure line is provided on the flange.

Die DE-A-1 528.363 zeigt ein Pumpsystem, bei dem drei Pumpen gemeinsam in einem wärmeisolierten Behälter untergebracht sind, der durch eine isolierte Lagerplatte abgedeckt ist. An dieser Lagerplatte sind die Flansche der einzelnen Pumpen befestigt. Jede einzelne Pumpe ist in einen an ihrem Flansch befestigten Zwischenbehälter untergebracht. Am unteren Ende des Pumpzylinders ist ein Steuerblock befestigt, der ein Einlassventil und Rückschlagventil enthält. Der Flansch jeder einzelnen Pumpe ist lediglich mit Anschlüssen für Einlass, Auslass und Entlüftung versehen.DE-A-1 528.363 shows a pump system in which three pumps are housed together in a thermally insulated container which is covered by an insulated bearing plate. The flanges of the individual pumps are attached to this bearing plate. Each individual pump is housed in an intermediate container attached to its flange. A control block is attached to the lower end of the pump cylinder and contains an inlet valve and a check valve. The flange of each individual pump is only provided with connections for inlet, outlet and ventilation.

Bei diesem bekannten cryogenen Pumpanlagen wurden die Armaturen mittels im Bereich der Pumpe verlegten Leitungen angeschlossen. Das fachgerechte Verlegen der Leitungen, Anbringen der Armaturen und Befestigen derselben an Stützelementen ist zeitraubend und verursacht hohe Montagekosten. Dazu kommt noch, dass das tiefgekühlte flüssige Medium in den freiliegenden Leitungen teilweise in den gasförmigen Aggregatzustand übergeht was den Wirkungsgrad herabsetzt.In this known cryogenic pump system, the fittings were connected by means of lines laid in the area of the pump. The professional laying of the lines, attaching the fittings and attaching them to support elements is time-consuming and causes high installation costs. In addition, the frozen liquid medium in the exposed lines partially changes into the gaseous state, which reduces the efficiency.

Die Erfindung stellt sich zur Aufgabe die Montage der Pumpanlage zu vereinfachen, zu verbilligen und zugleich den Wirkungsgrad der Anlage zu verbessern.The object of the invention is to simplify the assembly of the pump system, to make it cheaper and at the same time to improve the efficiency of the system.

Die Erfindung löst diese Aufgabe mit einem Pumpaggregat die die spezifischen Merkmale des Anspruches 1 aufweist.The invention solves this problem with a pump unit which has the specific features of claim 1.

Im Verteilerblock sind Bohrungen angebracht, die erlauben ein Grossteil der für den Betrieb der Pumpanlage erforderlichen Armaturen in den Verteilerblock einzubauen oder anzuschliessen, ohne dass dazu nach aussen führende Leitungen erforderlich sind. Dies setzt nicht nur die Montagekosten erheblich herab, sondern verhindert auch Kälte- bzw. Gasverluste. Die beigefügte Zeichnung zeigt das bereits erwähnte Schema Figur 1 und in Figur 2 bis 5 Ausführungsbeispiele des Erfindungsgegenstandes.

  • Figur 2 zeigt eine Seitenansicht eines Pumpaggregats mit dem Verteilerblock und daran angeschlossenen Armaturen in Ansicht und
  • Figur 3 zeigt den Verteilerblock des Aggregats nach Figur 2 für sich, mit abgenommenem Antriebsteil, in Ansicht von der Antriebsseite her.
  • Figur 4 die Pumpe des Aggregats nach Figur 2 im Schnitt
  • Figur 5 eine andere Pumpe mit Verteilerblock, im Schnitt
Holes are drilled in the manifold block, which allow a large part of the fittings required for the operation of the pumping system to be installed or connected in the manifold block without the need for external lines. This not only significantly reduces assembly costs, but also prevents cold or gas losses. The attached drawing shows the above-mentioned diagram in FIG. 1 and in FIGS. 2 to 5 exemplary embodiments of the subject matter of the invention.
  • Figure 2 shows a side view of a pump day gregats with the distributor block and fittings connected to it in view and
  • FIG. 3 shows the distributor block of the unit according to FIG. 2 for itself, with the drive part removed, in a view from the drive side.
  • Figure 4 shows the pump of the unit of Figure 2 in section
  • Figure 5 shows another pump with distributor block, on average

Figur 2 zeigt die pumpe mit deren Hauptbestandteilen, nämlich ein Kurbelgehäuse 20, ein damit verbundenes, mit Rippen versehenes Zwischenstück 30, den als Verteilerblock ausgebildete Flansch 40 der integral mit dem Pumpenzylinder 50 verbunden ist, und einen die wirksamen Teile der Pumpe umschliessenden wärmeisolierenden Behälter 60. Die Rippen am Zwischenstück 30 dienen der Kälteabgabe an die Umgebung, damit das Schmiermittel der Antriebsteile nicht erhärtet. Der wärmeisolierende Behälter 60 ist doppelwandig ausgeführt und wie ein Dewar-Gefäss evakuiert. Der Behälter 60 ist oben durch den Verteilerblock 40 abgeschlossen der an seiner unteren Seite mit dem Pumpenzylinder 50 integriert ist. An der oberen Seite geht er in einen zentralen Kragen 41 über, der von der Kolbenstange 51 durchsetzt wird.FIG. 2 shows the pump with its main components, namely a crankcase 20, an associated connecting piece 30 provided with ribs, the flange 40 designed as a distributor block, which is integrally connected to the pump cylinder 50, and a heat-insulating container 60 enclosing the effective parts of the pump The ribs on the intermediate piece 30 serve to release the cold into the environment so that the lubricant of the drive parts does not harden. The heat-insulating container 60 is double-walled and evacuated like a dewar. The container 60 is closed at the top by the distributor block 40 which is integrated on its lower side with the pump cylinder 50. On the upper side, it merges into a central collar 41 which is penetrated by the piston rod 51.

Von aussen ist dieser Kragen mit einem Gewinde versehen, das die Verbindung mit dem Antriebsteil 20, 30 herstellt. Weitere Details des Verteilerblocks sind in Figur 3 ersichtlich und werden später an Hand dieser Figur beschrieben.From the outside, this collar is provided with a thread, which establishes the connection with the drive part 20, 30. Further details of the distributor block can be seen in FIG. 3 and will be described later with reference to this figure.

Figur 2 gibt eine Uebersicht über die an, und teilweise im Verteilerblock angebrachten Armaturen, wobei teilweise bereits auf die Figuren 3 und 4 verwiesen wird. Die dem Schema nach Figur 1 entsprechenden Armaturen sind in Figur 2 und 3 mit denselben Bezugszahlen angedeutet.FIG. 2 gives an overview of the fittings, which are partially installed in the distributor block, reference being made in part to FIGS. 3 and 4. The fittings corresponding to the diagram according to FIG. 1 are indicated in FIGS. 2 and 3 with the same reference numbers.

Im oberen Teil des Verteilerblocks sind die der Entgasung dienenden Teile angebracht. Sie umfassen ein im Verteilerblock untergebrachtes, den Ventilen 3 und 4 entsprechendes Dreiwegventil 340 das von Hand mittels Griffes 341 umstellbar ist auf Gasaustritt ins Freie oder Gasaustritt mit Rückführung in den Tank T. Ferner ist hier das ND-Sicherheitsventil 5 aussen auf einem entsprechenden Ansatz des Verteilerblocks befestigt. (ND=Niederdruck) Seitlich am Verteilerblock 40 ist ein Anschluss 42 für das tiefgekühlte Medium aus dem Tank vorgesehen, während im unteren Bereich ein HD-Anschluss 43 (HD=Hochdruck) für das flüssige Gas vorgesehen ist. Das Rückschlagventil 7 ist im Verteilerblock selber angebracht.The parts used for degassing are attached in the upper part of the distributor block. They include a three-way valve 340 housed in the manifold block, corresponding to valves 3 and 4, which can be switched over manually by means of handle 341 to gas outlet to the outside or gas outlet with return to tank T. Furthermore, the LP safety valve 5 is on the outside on a corresponding extension of the Distribution blocks attached. (ND = low pressure) On the side of the distributor block 40 there is a connection 42 for the frozen medium from the tank, while in the lower area an HD connection 43 (HD = high pressure) is provided for the liquid gas. The check valve 7 is attached in the manifold block itself.

Ebenfalls an eine Bohrung im unteren Teil des Verteilerblocks 40 ist ein nach oben gerichtetes Rohr 9 angeschlossen das als Windkessel im HD-Teil funktioniert, da es sich selbsttägig infolge Verdampfung mit Gas füllt. Oben auf diesem Rohr ist das HD-Sicherheitsventil 8 aufgesetzt. Schliesslich sind an einer Bohrung, die mit dem HD in Verbindung steht über dem Anschluss 44 mit einem Rohr mit Manometer 10 und ein Differenzdruckschalter 11 angeschlossen.Also connected to a bore in the lower part of the distributor block 40 is an upwardly directed pipe 9 which functions as a wind boiler in the HP part, since it automatically fills with gas as a result of evaporation. The HD safety valve 8 is placed on top of this tube. Finally, a bore which is connected to the HD is connected via the connection 44 to a tube with a pressure gauge 10 and a differential pressure switch 11.

Figur 3 zeigt den Verteilerblock in grösserem Masstab in Ansicht von der Antriebseite. Im Zentrum befindet sich der Anschlusskragen 41 in dem Kolbenstange 51, gleitend abgedichtet geführt ist. Der Betätigungsschaft 342 für das Entgasungs-Ventil 340 ist durch Stopfbüchse 45 herausgeführt und oben mit Griff 341 versehen. Die Gas-Rückführleitung zum Vorratstank ist an einer Seite des Verteilerblocks mittels Anschluss 46 angeschlossen. An der gegenüberliegenden Seite ist mittels Anschluss 47 die ins Freie führende Leitung angeschlossen. An Flansch 48 ist das ND-Sicherheitsventil 5 angeschlossen, das der Deutlichkeit halber in Figur 3 weggelassen ist. An Flansch 49 schliesslich, der mit dem ND Teil in dem sich Gas bildet, in Verbindung steht ist ein automatischer Gasabscheider 70 vorgesehen, der bei geschlossener Stellung des dreiweghahnens 340 dessen Funktion übernimmt und das sich im Gefäss 60 bildende Gas in den Vorratstank T zurückführt.Figure 3 shows the distributor block on a larger scale in a view from the drive side. In the center is the connecting collar 41 in the piston rod 51, which is guided in a slidingly sealed manner. The actuation shaft 342 for the degassing valve 340 is led out through the stuffing box 45 and provided with a handle 341 at the top. The gas return line to the storage tank is connected to one side of the distributor block by means of connection 46. The line leading to the outside is connected on the opposite side by means of connection 47. The LP safety valve 5 is connected to flange 48 and is omitted in FIG. 3 for the sake of clarity. Finally, on flange 49, which is connected to the LP part in which gas is formed, an automatic gas separator 70 is provided, which takes over its function when the three-way valve 340 is in the closed position and returns the gas forming in the vessel 60 to the storage tank T.

Figur 4 zeigt die Pumpe des Aggregats nach Figur 2 im Schnitt. Es ist hier ersichtlich, wie die bereits erwähnten Teile in oder an den Bohrungen des Verteilerblocks 40 eingebaut, beziehungsweise angeschlossen sind. Eingebaut sind das Entgasungs-Ventil 340 und das Rückschlagventil 7 der Hochdruckleitung. Direkt angeschlossen ist das Niederdruck-Sicherheitsventil 5, der als Rohrstück g ausgebildete Windkessel mit HD Sicherheitsventil 8, der Manometer 10 und der Differenz-Druckschalter 11. Das Saugventil 52 befindet sich an dem vom Verteilerblock 40 abgewendeten Seite des Pumpenzylinders 50.Figure 4 shows the pump of the unit of Figure 2 in section. It can be seen here how the parts already mentioned are installed or connected in or on the bores of the distributor block 40. The degassing valve 340 and the check valve 7 of the high-pressure line are installed. Directly connected is the low-pressure safety valve 5, the wind boiler designed as a pipe section g with a high-pressure safety valve 8, the pressure gauge 10 and the differential pressure switch 11. The suction valve 52 is located on the side of the pump cylinder 50 facing away from the distributor block 40.

Figur 5 zeigt die Pumpe eines andern Aggregates im Schnitt. Sie unterscheidet sich von der Pumpe nach Figur 4 dadurch, dass hier das Saugventil 52 in dem als Verteilerblock ausgebildeten Flansch 400 eingebaut ist.Figure 5 shows the pump of another unit in section. It differs from the pump according to FIG. 4 in that the suction valve 52 is installed in the flange 400 designed as a distributor block.

An dieser Seite des Verteilerblocks ist aussen ein Saugkopf 53 angebaut, der mittels des Expansionsstücks 6 mit dem Vorratstank T in Verbindung steht. Rückfuhrleitung 54 führt dampfförmiges Medium in den Vorratstank zurück. Bei diesem Aufbau der Pumpe braucht die Kolbenstange 51 den Verteilerblock 400 nicht zu durchsetzen.A suction head 53 is attached to the outside of this side of the distributor block and is connected to the storage tank T by means of the expansion piece 6. Return line 54 returns vaporous medium to the storage tank. With this construction of the pump, the piston rod 51 does not need to pass through the distributor block 400.

In den Verteilerblock 400 eingebaut sind hier das bereits erwähnte Saugventil 52 und das Hochdruck-Rückschlagventil 7. Ferner sind im Verteilerblock 400 Bohrungen und Anschlüsse angebracht für den rohrförmigen Windkessel 9 mit dem HD Sicherheitsventil 8, ein Anschluss 43 für die HD Leitung, sowie das Entgasungshochdruckventil 340, und Niederdruckmanometer 10. Ferner sind im Verteilerblock 400 Bohrungen angebracht (in Figur 5 nicht sichtbar) für den direkten Anschluss von weiteren Armaturen, wie Hochdruckmanometer, Differenz-Druckschalter usw. Der mit dem Verteilerblock 400 integral verbundene Pumpenzylinder 500 ist durch eine mit Wärmeisolationsmaterial gefüllten Behälter 600 gegen Kälteverluste isoliert.The already mentioned suction valve 52 and the high-pressure check valve 7 are installed in the distributor block 400. Furthermore, bores and connections are provided in the distributor block 400 for the tubular wind boiler 9 with the high-pressure safety valve 8, a connection 43 for the high-pressure line, and the high-pressure degassing valve 340, and low-pressure manometer 10. Furthermore, 400 bores are made in the manifold block (not visible in FIG. 5) for the direct connection of further fittings, such as high-pressure manometers, differential pressure switches etc. The pump cylinder 500, which is integrally connected to the manifold block 400, is provided with a heat insulation material filled container 600 insulated against cold losses.

Claims (6)

1. A pump unit for cryogenic media with a high pressure piston pump of which the cylinder (50, 500) is connected integrally to a flange (40, 400), characterised in that this flange is constructed as a distributor block (40, 400) in which there are arranged recesses in which at least one high pressure nonreturn valve (7) and one low pressure vent valve (340) are fitted, while bores or channels arranged in the distributor block lead to connecting means (48) disposed externally on the distributor block, more specifically at least one connecting means (48) on which a low pressure safety valve (5) is directly mounted, also a connecting means on which a high pressure air chamber (9) with safety valve (8) is directly mounted, and in that further connecting means arranged externally on the distributor block are used for a high pressure line and a vapour return line.
2. A pump unit according to claim 1, in which the piston rod (51) passes through the distributor block (40), characterised in that means (41) for mechanical connection to the pump drive member (20, 30) are arranged on one side of the distributor block (40), in that the cylinder (50) with its the inlet valve (52) is positioned in a thermally insulated intermediate container (60) mounted on the opposite side of the distributor block and in that a connecting means (42) for the supply of a cryogenic medium is disposed externally on the distributor block.
3. A pump unit according to claim 1, in which means (41) for mechanical connection to the pump drive member (20, 30) are arranged on the cylinder (500), in that, on the side of the distributor block (400) remote from the cylinder (500), there is mounted an intermediate container (53) which communicates with an inlet valve (52) positioned in a recess of the distributor block.
4. A pump unit according to claim 3, characterised in that the cylinder (500) is provided with a thermally insulating shell (600).
5. A pump unit according to claim 1, characterised in that a connecting means on which an automatic gas separator (70) is mounted is disposed on the distributor block (40).
6. A pump unit according to claim 1, characterised in that a connecting means (44) for a capillary tube is arranged on the distributor block (40).
EP85114879A 1984-12-11 1985-11-23 Pump unit for cryogenic fluids Expired - Lifetime EP0185943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85114879T ATE57239T1 (en) 1984-12-11 1985-11-23 PUMP UNIT FOR CRYOGENE MEDIA.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH588684 1984-12-11
CH5886/84 1984-12-11

Publications (3)

Publication Number Publication Date
EP0185943A2 EP0185943A2 (en) 1986-07-02
EP0185943A3 EP0185943A3 (en) 1989-03-29
EP0185943B1 true EP0185943B1 (en) 1990-10-03

Family

ID=4300975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114879A Expired - Lifetime EP0185943B1 (en) 1984-12-11 1985-11-23 Pump unit for cryogenic fluids

Country Status (3)

Country Link
EP (1) EP0185943B1 (en)
AT (1) ATE57239T1 (en)
DE (1) DE3580011D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006000835A1 (en) * 2006-01-05 2007-07-12 Linde Ag Arrangement for compressing cryogenic liquids
MD4409C1 (en) * 2015-04-10 2016-10-31 Ион ЧЕРЕМПЕЙ Cryogenic gas-turbine plant with closed circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1113399A (en) * 1964-07-27 1968-05-15 Pico Cryogenic Products Corp Oil seal particularly for a reciprocating cryogenic pump
DE1528363A1 (en) * 1965-10-16 1970-07-30 Air Prod & Chem Pump system for volatile liquids
US3632235A (en) * 1969-06-09 1972-01-04 Carl A Grenci Cryogenic pump system

Also Published As

Publication number Publication date
DE3580011D1 (en) 1990-11-08
EP0185943A3 (en) 1989-03-29
ATE57239T1 (en) 1990-10-15
EP0185943A2 (en) 1986-07-02

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