EP0185943B1 - Groupe de pompage pour fluides cryogéniques - Google Patents

Groupe de pompage pour fluides cryogéniques 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
Authority
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
Other languages
German (de)
English (en)
Other versions
EP0185943A3 (en
EP0185943A2 (fr
Inventor
Jean Tornare
Klaus Bofinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives Cryomec AG
Original Assignee
Cryomec AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cryomec AG filed Critical Cryomec AG
Priority to AT85114879T priority Critical patent/ATE57239T1/de
Publication of EP0185943A2 publication Critical patent/EP0185943A2/fr
Publication of EP0185943A3 publication Critical patent/EP0185943A3/de
Application granted granted Critical
Publication of EP0185943B1 publication Critical patent/EP0185943B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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.

Landscapes

  • 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)

Claims (6)

1. Groupe de pompage pour fluides cryogéniques, avec une pompe à piston haute pression, dont le cylindre (50, 500) fait partie intégrante d'une bride (40, 400), caractérisé en ce que cette bride est réalisée comme bloc répartiteur (40, 400), dans lequel on a pratiqué des évidements dans lesquels sont montés au moins une soupape retenue haute pression (7) et une soupape de dégazage basse pression (340), tandis que les perçages ou canaux ménagés dans le bloc répartiteur conduisent vers l'extérieur à des raccords et au moins à un raccord (48) sur lequel est monté directement une soupape de sécurité basse pression (5), en outre il y a un raccord sur lequel est monté directement un ballon de gaz (9) haute pression avec soupape de sécurité (8), et que d'autres raccords prévus à l'extérieur sur le bloc répartiteur servent à une conduite haute pression et à une conduite de recyclage de vapeur.
2. Groupe de pompage selon la revendication 1, dans lequel la tige de piston (51) traverse le bloc répartiteur (40), caractérisé en ce qu'on prévoit sur une face du bloc répartiteur (40) des moyens (41) de fixation mécanique sur la partie d'entraînement de la pompe (20, 30), qu'on place le cylindre (50) avec sa soupape d'aspiration (52) dans un récipient intermédiaire (60) thermiquement isolé fixé sur la face opposée du bloc répartiteur et qu'on place à l'extérieur sur le bloc répartiteur un raccord (42) pour l'alimentation en milieu cryogénique.
3. Groupe de pompage selon la revendication 1, dans lequel on a placé sur le cylindre (500) des moyens (41) de connexion mécanique avec la partie d'entraînement de pompe (20, 30), que sur la face du bloc répartiteur (400) opposée au cylindre (500), on a monté un réservoir intermédiaire (53), qui est en communication avec une soupape d'aspiration (52) placée dans un évidement du bloc répartiteur.
4. Groupe de pompage selon la revendication 3, caractérisé en ce qu'on équipe le cylindre (500) d'une enveloppe thermiquement isolante (600).
5. Groupe de pompage selon la revendication 1, caractérisé en ce qu'on prévoit un raccord (49) sur le bloc répartiteur (40), sur lequel on a monté un séparateur automatique de gaz (70).
6. Groupe de pompage selon la revendication 1, caractérisé en ce qu'on place sur le bloc répartiteur (40) un raccord (44) pour un tube capillaire.
EP85114879A 1984-12-11 1985-11-23 Groupe de pompage pour fluides cryogéniques Expired - Lifetime EP0185943B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85114879T ATE57239T1 (de) 1984-12-11 1985-11-23 Pumpaggregat fuer cryogene medien.

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 (fr) 1986-07-02
EP0185943A3 EP0185943A3 (en) 1989-03-29
EP0185943B1 true EP0185943B1 (fr) 1990-10-03

Family

ID=4300975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114879A Expired - Lifetime EP0185943B1 (fr) 1984-12-11 1985-11-23 Groupe de pompage pour fluides cryogéniques

Country Status (3)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006000835A1 (de) * 2006-01-05 2007-07-12 Linde Ag Anordnung zum Verdichten von kryogenen Flüssigkeiten
MD4409C1 (ro) * 2015-04-10 2016-10-31 Ион ЧЕРЕМПЕЙ Instalaţie criogenică cu gaz cu turbină cu circuit închis

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 (de) * 1965-10-16 1970-07-30 Air Prod & Chem Pumpensystem fuer leichtfluechtige Fluessigkeiten
US3632235A (en) * 1969-06-09 1972-01-04 Carl A Grenci Cryogenic pump system

Also Published As

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

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