EP3529493A1 - Pompe cryogénique - Google Patents
Pompe cryogéniqueInfo
- Publication number
- EP3529493A1 EP3529493A1 EP17797399.7A EP17797399A EP3529493A1 EP 3529493 A1 EP3529493 A1 EP 3529493A1 EP 17797399 A EP17797399 A EP 17797399A EP 3529493 A1 EP3529493 A1 EP 3529493A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- discharge valve
- chamber
- cryogenic
- supply
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000005086 pumping Methods 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000007872 degassing Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000000763 evoking effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
- F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0452—Distribution members, e.g. valves
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
-
- 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
-
- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
Definitions
- the present invention relates to a cryogenic pump and more particularly to a cryogenic piston pump.
- a cryogenic pump is used to increase the pressure of a liquid at a very low temperature, usually below -100 ° C.
- a piston pump there is a "conventional" pump structure with a piston moving in a cylinder closed at one end thereby defining a pumping chamber which is associated with liquid supply means and means for discharging liquid under pressure.
- the liquid must vaporise, on the one hand, so as not to "lose” the liquid and, on the other hand, to avoid problems of cavitation in the pump.
- it is known to isolate the pump by placing an insulating envelope around a part called pump head and which comprises in particular the pumping chamber, the supply means and the discharge means, that is to say the part of the pump in which the cryogenic fluid circulates.
- WO82 / 03337 discloses a multi-cylinder pump for a cryogenic liquid provided with a discharge system in which the inlet valve of each cylinder can be selectively held in the open or closed position. In the closed position, the operation of the cylinder is normal, whereas in the open position, the liquid can not reach a sufficient pressure to allow it to exit through the outlet valve, thus deactivating the cylinder. Note that for each cylinder, the admission of cryogenic liquid is made radially while the discharge of the liquid under pressure is axial.
- EP-2 600 001 illustrates a cryogenic piston pump which has a pump head not only insulated but also cooled. Cooling is achieved by circulating a fluid at low temperature between two insulating shells.
- cryogenic liquid low pressure
- discharge of the liquid under high pressure is radially.
- a first drawback is the difficulty in producing the structure.
- the temperature and pressure constraints to which the pump will be subjected are important. It is necessary with these constraints first of all to make a connection for the discharge on a pump body and then to pass through at least one insulating envelope.
- connection for delivery is usually in one piece with the pump casing.
- the realization of this connection is usually made from a solid body by turning-milling on a multi-axis digital machine tool and requires a lot of material removal.
- sheets and flanges are reported to form at least one insulation envelope of the pump head and the passage of an insulation envelope requires to adapt the envelope to the connector and then to make a tight connection, by welding, between the envelope and the fitting.
- many steps are needed to arrive at the finished product.
- a second disadvantage of such a structure is its size. It is indeed necessary to provide space in the extension of the pump to make the connection of the liquid inlet to be compressed and also the space laterally to the pump to connect the discharge of liquid under pressure.
- the document DE 10 201 1 080 287 describes a piston pump intended to be used in particular for a motor vehicle braking system.
- the pump includes a transfer piston for transferring liquid and a piston return spring which is a spiral spring. In this document, no problem of thermal insulation is posed.
- the present invention therefore aims to provide a cryogenic pump (which therefore has a thermal insulation), including a piston pump, which has a simplified structure in particular to limit its manufacturing cost.
- the pump according to the invention will preferably be compact and compact.
- a pump according to the invention will preferably have an increased life compared to a known pump of the prior art.
- cryogenic pump of the type comprising:
- a pump body inside which is a piston mounted to move in translation along an axis said longitudinal axis and delimiting a pumping chamber
- means for discharging liquid under pressure out of the pumping chamber comprising an outlet made in a discharge valve body mounted on the longitudinal axis, said outlet being closed by a discharge valve mounted in said discharge valve body;
- - Liquid supply means in the pumping chamber comprising a supply valve disposed around the outlet of the pumping chamber, and
- a supply chamber disposed around the discharge valve body in communication with the pumping chamber via at least one passage whose opening and closing are controlled by the supply valve.
- the feed chamber is closed on the opposite side to the piston by a cover having a first passage to allow a supply of cryogenic liquid from the feed chamber and a second passage to allow a discharge of pumped liquid.
- This structure makes it possible to have an axial supply of the pump as well as an axial discharge also. It is therefore no longer necessary to provide a radial outlet for the discharge of the liquid under pressure, which greatly simplifies the structure of the cryogenic pump. In addition, it is easier to make connections and / or passages at a lid than the envelope made around the pump body.
- the discharge valve body is for example a one-piece workpiece, machined and tubular, having a discharge valve seat.
- the discharge valve may be for example a conical valve cooperating with the discharge valve seat.
- the feed means comprise, on the one hand, inlet orifices disposed at the periphery of a front face of the discharge valve body and, on the other hand, a shutter annular shape adapted to the shape and arrangement of the inlet ports, said shutter being movable between an open position allowing the passage of a fluid through the inlet ports and a closed position in which all the orifices of input are closed by said shutter, elastic means preloading the shutter in its closed position.
- the inlet orifices are preferably integrated in the discharge valve body while being disposed at the periphery of the hollow part of this body. valve. This makes it possible to have a single piece through which both the low-pressure liquid supply and the discharge of the high-pressure liquid are made. This makes it possible to further simplify the structure of the pump and thus to limit the assemblies necessary for its production.
- the discharge valve body is mounted directly on the pump body by clamping and / or
- the lid has an overall shape of revolution about the longitudinal axis (24) and / or the lid has a convex shape, its concavity being oriented towards the inside of the pump and / or
- the cover further has a degassing connection.
- the pump body may be surrounded by a generally cylindrical envelope, closed at the end on the discharge valve side by the cover so as to laterally delimit the feed chamber for receiving liquid to be pumped, said supply chamber also extending partially around the pump body.
- the cryogenic pump further comprises a second casing mounted concentrically around the first casing so as to form an insulation chamber around the pump body.
- a same cover is preferably used to close the supply chamber around the pump body intended to receive liquid to be pumped and the isolation enclosure.
- FIG. 1 is a side view of a cryogenic pump according to the invention
- FIG. 2 is a longitudinal sectional view of the pump of FIG.
- FIG. 3 is a first perspective view of a discharge valve body implemented in the pump illustrated in FIGS. 1 and 2, and
- Figure 4 is a second view of the body shown in Figure 3 but at another angle.
- FIG 1 is an external view of a cryogenic pump type piston pump. It is intended to pump a cryogenic liquid, for example liquid nitrogen, liquefied natural gas, liquid air, ....
- a cryogenic liquid for example liquid nitrogen, liquefied natural gas, liquid air, ....
- the applications of such a pump are numerous.
- such a pump can be used within a vehicle (land or sea) for the fuel supply system of an engine, or again in a liquid delivery station for delivering cryogenic liquid to a vehicle or for filling bottles, ....
- This pump comprises a pump body 2 in which is made a pumping chamber visible in Figure 2 and described below.
- the pump body 2 comprises a first flange 4 to allow its attachment to a linkage (not shown). This linkage is intended to drive a piston via a piston rod 6.
- an insulating enclosure 8 partially surrounds the pump body 2, in particular the portion of the pump body 2 intended to receive cryogenic liquid, this part of the pump also being called a pump head.
- the insulating enclosure 8 is fixed on a second flange 10 of the pump body 2. It is closed at one of its ends by said second flange 10 and at its opposite end by a cover 12. Note on this cover 12 the presence of a degassing connection 14, a supply connection 16 in cryogenic liquid and a passage for the passage of the cover by a discharge valve body 18.
- the illustrated pump is thus supplied with cryogenic liquid to be pumped by the supply connection 16 and the cryogenic liquid under high pressure leaves the pump through an outlet fitting 20 mounted on the discharge valve body 18 to supply a discharge line 22.
- Figure 2 illustrates the interior of the pump of Figure 1.
- the pump body 2 inside which is formed a bore of generally cylindrical circular shape defining a longitudinal axis, said axis 24 of the pump.
- This bore is machined so as to make it possible to seal the guide of a piston 26: a gas seal 28 is provided between the bore and the piston rod 6 while the piston 26 slides in a jacket 30, seals being provided between the piston 26 and the jacket 30.
- the bore receiving the piston 26 with its gas seal 28 and its jacket 30 passes through the pump body 2 from one side to the other.
- the pump body 2 On the side of the piston 26, the pump body 2 is closed by the discharge valve body 18 which is illustrated in more detail in FIGS. 3 and 4.
- the space, of variable volume, between the piston 26 and the body of the Discharge valve 18 forms the pumping chamber 31 already mentioned above.
- the discharge valve body 18 is a tubular member having an outer surface and an inner surface which are surfaces of revolution about the pump axis 24.
- the discharge valve body 18 On the side of the pump body 2, the discharge valve body 18 has a disc shape whose outer diameter is adapted to the inside diameter of the end of the bore formed in the pump body 2. Thus, the body of the Discharge valve 18 may fit into the pump body 2.
- the diameter of the disc at the end of the discharge valve body 18 decreases so that it has a shoulder.
- the discharge valve body 18 has a radial bearing surface 32 for receiving a clamping ring 34 to allow the fixing of the discharge valve body 18 by screwing on a front face of the pump body 2.
- the discharge valve body 18 Above its end disk, the discharge valve body 18 has a narrowing and then gradually widens to substantially recover its diameter above the shoulder and the radial bearing surface 32.
- Axial bores 36 are made through the end disc of the valve and open on the one hand into the end face of the discharge valve body 18 and on the other hand at the narrowing of the outer surface of the discharge valve body 18.
- a shutter 42 is housed in the bore of the pump body 2. It is in the form of a washer and is movable in translation in the longitudinal direction.
- the shutter 42 On the side of the discharge valve body 18, the shutter 42 has a planar face which has a shape and a surface condition adapted to close all the axial bores 36 of the discharge valve body 18 when the shutter 42 comes to rest. against the front face of said body disposed in the bore of the pump body 2.
- a spring 44 preloads the shutter 42 in this closed position of the axial bores 36.
- the shutter 42 thus forms in cooperation with the axial bores 36 a valve used for feeding the pump as will be apparent later in the description of the operation of the pump.
- the inner bore of the pump body 2 and the jacket 30 are arranged.
- the inner bore of the pump body 2 widens on the side of the discharge valve body 18.
- the jacket 30 has a constant inner diameter. Its outer diameter increases when the inside diameter of the bore of the pump body 2 increases so that the liner 30 has an outer shoulder which is adapted to the inner shoulder of the bore of the pump body 2. These two shoulders allow a positioning of the liner 30 in the bore of the pump body 2.
- the diameter of the outer wall of the liner 30 decreases to receive the spring 44 which is then mounted between the liner 30 and a sleeve 46. The latter bears against the end face of the discharge valve body 18 disposed in the bore of the pump body 2. Its inner surface serves as a guiding surface for the spring 44 and for the shutter 42 The latter can thus move between the front end of the jacket 30 and the discharge valve body 18.
- This speaker has a double envelope:
- a first circular cylindrical envelope 48 is welded (see weld seam 52 in FIG. 2) on a sealing ring 54 fixed on the second flange 10, on the side of the discharge valve body 18.
- a second envelope 56 also of generally circular cylindrical shape surrounds the first envelope 48 leaving a gap between the two envelopes.
- One end of the second envelope 56 is sealingly mounted, for example welded, on the outer face of the sealing ring 54.
- the sealing ring thus forms a second cover closing at one end the space between the first casing 48 and the second casing 56. It is made of an insulating material adapted to very low temperatures. It is fixed on the second flange 10 for example by screws.
- a partial vacuum is here realized between the first envelope 48 and the second envelope 56.
- a connector 58 is then used to connect the insulating enclosure 8 to a vacuum pump (not shown).
- the cover 12 sealingly closes the insulating enclosure 8 on the side opposite to the sealing ring 54 and thus creates around the pump head a reserve chamber 60 intended to receive cryogenic liquid low pressure to supply the pump in cryogenic liquid.
- This cover 12 is in the overall form of a curved disk having a concavity oriented towards the piston 26 and the reserve chamber 60. It is made of an insulating material thermally adapted to very low temperatures.
- the domed shape of the lid 12 is obtained by combining a disk-shaped central portion and a conically shaped peripheral portion.
- the cover 12 extends substantially transversely to the longitudinal axis 24.
- the central portion (disc-shaped) extends transversely.
- the cover has another shape, it can for example be provided that it has generally a form of revolution (which is the case in the embodiment shown) around the longitudinal axis 24.
- This cover 12 and the enclosure 8 are insulating such that they have a junction surface located in a transverse plane (relative to the longitudinal axis 24) or substantially transverse.
- the reserve chamber 60 is delimited by the pump body 2, the first casing 48, the sealing ring 54 and the cover 12. At the latter, the seal is made by welding the cover 12 to the first one. 48 and the second casing 56.
- the supply connection 16 and the degassing connector 14 can also be welded to the cover 12 to ensure each time a sealed connection.
- the seal be made by a set of seals 50 adapted for use at a very low temperature and for cryogenic liquids.
- the discharge valve body 18 passes through the cover 12 in the center thereof, at the disk-shaped portion of the cover 12.
- the supply connector 16 and the degassing connection 14 are arranged at the conical peripheral portion of the lid 12.
- connection 16 and degassing connection 14 are therefore a little inclined relative to the longitudinal axis.
- the angle of inclination formed by each of these connections (supply connection 16 and degassing connection 14) with the longitudinal axis 24 is preferably less than 45 °, more preferably less than 30 °, or even less than 30 °. 20 °.
- the operation of the pump described above and illustrated in the drawing is as follows. It is ensured for the operation of the pump that the degassing connector 14 is in the raised position to collect all the vapors from a possible vaporization of the cryogenic liquid.
- the supply connection 16 (arranged for example diametrically opposite the degassing connection 14) is connected to a source of cryogenic liquid to be pumped. The feed can be done by gravity if the liquid reservoir is in the up position relative to the pump or by using another cryogenic pump. It is suitable for the supply of liquid to ensure that the reserve chamber 60 is continuously fed and filled with liquid to prevent gas from entering the pump.
- the piston 26 is driven back and forth in the liner 30 via its piston rod 6 which is connected to a not shown linkage.
- the volume of the pumping chamber 31 increases and a depression is created thereby in this chamber.
- This vacuum sucks the shutter 42 inwardly from the pumping chamber 31 and thus opens the axial bores 36 made in the discharge valve body 18.
- the spring 44 is sized according to the characteristics of the pump and in particular to allow the opening of the shutter 42 during the stroke of the piston 26 when it moves away from the discharge valve body 18. During this race, the pumping chamber 31 fills with cryogenic liquid.
- the direction of movement of the piston 26 changes and the piston 26 then approaches the discharge valve body 18.
- the cryogenic liquid in the pumping chamber 31 is pushed against the shutter 42 which closes.
- the liquid in the pumping chamber 31 pushed by the piston 26 causes the discharge valve to open by opening the conical valve 40.
- the cryogenic liquid is then discharged at high pressure (for example from 100 to 400 bar, ie from 10 to 40 ⁇ 10 6 Pa) in the discharge line 22.
- high pressure for example from 100 to 400 bar, ie from 10 to 40 ⁇ 10 6 Pa
- the operation of the pump is thus very close to that of a pump of the prior art but with a very different structure.
- the original structure of the "all axial" type makes it possible to maintain the performance of a pump of the prior art having similar characteristics (delivered pressure, power, etc.) with two main advantages, on the one hand, and easier manufacture. and, on the other hand, a small footprint.
- the length of the pump is not affected but due to the absence of radial discharge output, the size of the diameter is substantially reduced.
- the proposed new structure allowed to have a pump proper in two parts (the pump body with the cylinder receiving the piston and the discharge valve body also integrating the which are simpler to make, repair and / or change than the elements of a similar pump of the prior art.
- the production of the pump body also makes it possible to limit the chips produced during its machining.
- the machining operations are also fewer and more homogeneous on the parts (no differently machined area including to provide a radial output).
- the internal stresses to the parts during machining are less important, which also makes it possible to limit the nitrogen quenching to be performed during manufacture.
- the number of welds to be made could be divided by two.
- the longitudinal welds of the prior art which require radiographic checks or the like, have been removed and replaced by radial welds simpler to achieve and control.
- the presence of the insulating enclosure is (very) advantageous but remains optional.
- the lid closing the supply chamber could for example be fixed on the clamping ring holding the discharge valve body.
- the axial openings for feeding the pumping chamber are integrated with the discharge valve body.
- Another arrangement with separation between the supply means and the discharge means could be envisaged.
- other valve systems known to those skilled in the art could be used both for the supply of the pump and for the discharge.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1660288A FR3057916B1 (fr) | 2016-10-24 | 2016-10-24 | Pompe cryogenique |
PCT/FR2017/052900 WO2018078255A1 (fr) | 2016-10-24 | 2017-10-20 | Pompe cryogénique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3529493A1 true EP3529493A1 (fr) | 2019-08-28 |
EP3529493B1 EP3529493B1 (fr) | 2020-06-17 |
Family
ID=57906776
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17797399.7A Active EP3529493B1 (fr) | 2016-10-24 | 2017-10-20 | Pompe cryogénique |
Country Status (4)
Country | Link |
---|---|
US (1) | US20190293067A1 (fr) |
EP (1) | EP3529493B1 (fr) |
FR (1) | FR3057916B1 (fr) |
WO (1) | WO2018078255A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018189217A1 (fr) * | 2017-04-11 | 2018-10-18 | Udo Tartler | Dispositif destiné à étanchéifier et à faire le vide dans un récipient contenant un liquide pâteux |
FR3109610B1 (fr) | 2020-04-23 | 2022-04-08 | Air Liquide | Appareil de compression et station de remplissage comprenant un tel appareil |
FR3115333B1 (fr) * | 2020-10-19 | 2022-12-09 | F2M | Piston pour pompe de fluide cryogénique |
CN114542427B (zh) * | 2022-04-26 | 2022-08-05 | 杭州新亚低温科技有限公司 | 一种零吸入压头低温液体泵 |
FR3135760A1 (fr) * | 2022-05-23 | 2023-11-24 | Fives Cryomec Ag | Pompe cryogénique |
WO2024047050A1 (fr) | 2022-08-30 | 2024-03-07 | SVANEHØJ Danmark A/S | Pompe à piston |
WO2024047055A1 (fr) | 2022-08-30 | 2024-03-07 | SVANEHØJ Danmark A/S | Pompe à piston |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4376377A (en) * | 1981-04-03 | 1983-03-15 | Cryomec, Inc. | Unloading system for cryogenic pumps |
DE102011080287A1 (de) * | 2011-08-02 | 2013-02-07 | Robert Bosch Gmbh | Kolbenpumpe, insbesondere eines Fahrzeugbremssystems |
ES2527505T3 (es) | 2011-11-29 | 2015-01-26 | Cryostar Sas | Bombas criogénicas |
-
2016
- 2016-10-24 FR FR1660288A patent/FR3057916B1/fr active Active
-
2017
- 2017-10-20 WO PCT/FR2017/052900 patent/WO2018078255A1/fr active Application Filing
- 2017-10-20 EP EP17797399.7A patent/EP3529493B1/fr active Active
- 2017-10-20 US US16/344,537 patent/US20190293067A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
WO2018078255A1 (fr) | 2018-05-03 |
FR3057916B1 (fr) | 2021-11-05 |
EP3529493B1 (fr) | 2020-06-17 |
US20190293067A1 (en) | 2019-09-26 |
FR3057916A1 (fr) | 2018-04-27 |
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