EP0011286A1 - Procédé et dispositif de fonctionnement pour pompe à jet d'eau - Google Patents

Procédé et dispositif de fonctionnement pour pompe à jet d'eau Download PDF

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Publication number
EP0011286A1
EP0011286A1 EP79104491A EP79104491A EP0011286A1 EP 0011286 A1 EP0011286 A1 EP 0011286A1 EP 79104491 A EP79104491 A EP 79104491A EP 79104491 A EP79104491 A EP 79104491A EP 0011286 A1 EP0011286 A1 EP 0011286A1
Authority
EP
European Patent Office
Prior art keywords
water
expulsion
vessels
compressed air
air
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
Application number
EP79104491A
Other languages
German (de)
English (en)
Other versions
EP0011286B1 (fr
Inventor
Siegfried Dr. Agr. Dipl.-Landwirt Heilenz
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT79104491T priority Critical patent/ATE494T1/de
Publication of EP0011286A1 publication Critical patent/EP0011286A1/fr
Application granted granted Critical
Publication of EP0011286B1 publication Critical patent/EP0011286B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
    • F04F1/10—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped of multiple type, e.g. with two or more units in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
    • F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids

Definitions

  • the invention relates to a method for operating a water jet pump, in which the water required for operating the pump is circulated.
  • Water jet pumps are e.g. extensively used in laboratories, e.g. for drying substances or for evaporating solutions at low temperature, thereby avoiding thermal stress on the substances to be treated.
  • Water jet pumps have the advantage that they are very simple, have practically no wear and are practically insensitive to corrosion if, as usual, they are made of glass or plastic.
  • a coarse vacuum in the range between 100 mm of mercury and 15 mm of mercury can be easily created with water jet pumps, which is sufficient for many laboratory purposes.
  • an electrically driven circulation pump is used, which pressurizes water that has run off from the water jet pump and supplies the process water connection to the water jet pump.
  • the achievable pressure depends strongly on the temperature of the process water, since the pressure can never be lower than the vapor pressure of the process water, which is higher the higher the temperature of the process water.
  • the process water now heats up relatively quickly, so that the suction power of the water jet pump is lower than when fresh water is continuously supplied. If you still want to reach low temperatures, the process water must be cooled with special cooling devices. In this case, there is considerable expenditure on equipment with extensive electrical installations.
  • the invention has for its object to provide a method of the type mentioned so that electrical installations can be dispensed with and cooling of the process water is still achieved.
  • a further development of the invention is also intended to create an advantageous device for carrying out the method.
  • This object is achieved according to the invention in that the water is pressurized by means of compressed air at a substantially constant air pressure and in that compressed air which has been used to expel water by the water jet pump is expanded in a delimited relaxation space, heat being removed from the water being released from the air during and after its relaxation is recorded.
  • compressed air is used according to the invention to pump the water around.
  • compressed air connections are generally located at every work station, so that the installation of a special compressor is not necessary.
  • the air does not relax during the expulsion of the water, so that the water jet pump always has a constant water pressure and thus a constant suction power.
  • the compressed air When the compressed air has fulfilled its expulsion function, it is used according to the invention to cool the process water to be circulated. When the air relaxes, which is still under high pressure after being expelled, the air cools down considerably. This cooling is used to extract heat from the process water. It is therefore possible to maintain a low temperature of the circulating water without a special cooling unit and thus achieve a low pressure.
  • the cooled process water can be led through cold traps in a secondary circuit and replace the fresh water that is otherwise required. Since both the pumping of the process water and the cooling of the process water take place with compressed air, no electrical installations are required. This is particularly advantageous for a laboratory, since electrical installations would have to be particularly protected against moisture.
  • the removal of heat from the water can be brought about by washing the relaxation space with water according to claim 2, for example arranging it in a water filling of a comprehensive container.
  • An especially good efficiency is achieved, however, if the Ans p RUE chen is brought 3 and 4 which are relaxing air immediately with the water to be cooled into contact according to what can be reached easily by the fact that is introduced into a flash vessel of water through a nozzle , which is then torn into droplets by the relaxing air.
  • risers according to claim 11 and the compressed air supply according to claim 12 ensures water out drive, without the risk that driving compressed air also flows to the water jet pump.
  • the arrangement could also be chosen differently. It is also not out of the question to let the driving compressed air escape under the water level.
  • a reversing device enables automatic continuous operation of the device with the simplest means such that the water jet pump is continuously supplied with process water.
  • control devices according to claim 19 are combined in a control plate which is also used to hold the vessels in the surrounding container.
  • a water jet pump or several water jet pumps according to claim 2 0 on the wall of the container because this saves pipes for the return of the process water.
  • the water jet pump can also be arranged elsewhere and the water returned via pipes, for example hoses.
  • the changing filling and emptying of the expulsion vessels can also be controlled with a time-dependent control, by means of which a switchover from one expulsion vessel to the other takes place after a predetermined, preferably adjustable period of time, the period of time being selected such that the switchover takes place in any case, before the emptying expulsion vessel is completely empty.
  • the device according to claims 21 and 22 can advantageously be used.
  • the arrangement of the relaxation vessel above the water filling and the removal of the water and the relaxed air at the deepest point of the relaxation vessel ensures in a simple manner that water does not accumulate in the relaxation vessel.
  • the main components of the device are a recirculation container 1, two expulsion vessels 2 and 3, an expansion vessel 4, a compressed air control slide 5 with an associated reversing device, generally designated 6, a reversing piston 7 for reversing the water supply and two water jet pumps 8 and 9.
  • a recirculation container 1 two expulsion vessels 2 and 3
  • an expansion vessel 4 a compressed air control slide 5 with an associated reversing device, generally designated 6,
  • a reversing piston 7 for reversing the water supply and two water jet pumps 8 and 9.
  • the surrounding container 1 as shown in FIG. 1, has a rectangular plan and a relatively large height in relation to the plan (see FIG. 2).
  • the container can be made of plastic, for example.
  • At the bottom of the box strips 1 0 , 11 and 12 are installed, on which the vessels 2, 3 and 4 are placed, so that these vessels have a certain distance from the bottom 13 of the container 1.
  • a water drain opening 14 is arranged close to the bottom 13 and is closed by a plug 15.
  • the expulsion vessels 2 and 3 have a cylindrical shape and are closed at the top with a ceiling 16 and at the bottom with a screwed-on bottom 17. Both vessels are of the same design and are explained using the example of vessel 2.
  • valve flap 19 At the bottom 17 there is a large opening 18 which is closed with a valve flap 19.
  • the valve flap is pivotable about a horizontal axis 20 and has a sealing covering 21.
  • a float 23 is arranged, which is vertically movable in a cage 24.
  • the cage 24 has holes 24a so that its interior communicates with the interior 25 of the expulsion cylinder.
  • a valve plate 26 At the top of the float 23 there is a valve plate 26 which cooperates with a valve seat 27 which is located at the lower end of a control line 28 which is guided through the ceiling 16 into the interior 25 of the expulsion vessel.
  • the expansion vessel 4 consists of a good heat-conducting material, for example made of stainless steel, and has ribs 28 on its outside. Baffles are arranged in the interior of the expansion vessel 4, for example transverse plates 29 and 30, which force air entering the expansion vessel 4 to detour, so that a sound dampening effect occurs.
  • the vessels 2, 3 and 4 are held in the container by a control plate designated as a whole by 32.
  • This control plate rests on the upper sides of the vessels 2, 3 and 4 and is secured against lifting upwards by means of holding elements 33 and 34.
  • the aforementioned rotary valve 5 is mounted in the control plate.
  • the control plate receives the reversing piston 7, as the section according to FIG. 4 shows.
  • the rotary valve 5 has a cylindrical body in which there are two angular channels 35 and 36 at an axial distance from one another. At the level of the angular channel 35, three channels 37, 38 and 39 are arranged in the control plate 32.
  • the channel 38 has a vertical section 38 a, which leads to a compressed air connection 40.
  • the channel 37 leads from the bore 41, in which the rotary valve 5 is mounted, via a vertical section 37a into the expulsion vessel 2.
  • the channel 39 is symmetrical with the channel 37 and leads into the expulsion vessel 3.
  • the compressed air connection 40 communicates with the expulsion vessel 3. After the rotary valve 5 has been rotated clockwise by 90 °, the expulsion vessel 2 is connected to the compressed air connection 40.
  • valve balls 46 which consist of a material which is specifically lighter than water and which are each guided in a cage 47 which has cross bores 47a.
  • Rising lines 48 and 49 are arranged in the expulsion vessels 2 and 3 (see FIG. 4). These risers extend to the floors 17 and have bevels 48a at their ends.
  • the risers 48 and 49 pass through the top surfaces of the expulsion vessels and communicate with angular channels 50 and 51 in the control plate 32.
  • the angular channels open axially into a cylinder 52 in which the piston 7 is movable.
  • valve seats 53 and 54 At the ends of the cylinder 52 there are valve seats 53 and 54, with which the piston 7, which also acts as a valve disk, can come to rest with sealing edges 7a, 7b.
  • a bore 55 opens radially, which (see FIG. 1) is guided to the edge of the control plate 32.
  • a pipe 56 is connected to the bore 55 and branches at its end into two pipes 57 and 58, in which taps 59 and 60 are located.
  • the lines 57, 58 leading to the water jet pumps 8 and 9, at which S augan Why 8a and 9a are located, are connected to the to be evacuated vessels, eg via flexible hoses.
  • Two cylinders 61 and 62 are placed on the control plate 32, into which the already mentioned compressed air lines 28 open at the ends of the cylinder bores 61a and 62a. Between the two cylinders 61 and 62 extends a rod 63, the ends of which are designed as pistons 64 and 65, which are fitted into the cylinders 61a and 62a. In the middle of the rod there is a recess 66 into which (see FIG. 1) an arm 67 engages, which is firmly connected to the rotary valve 5 and projects radially from the arm.
  • the device works as follows.
  • water When commissioning, water is first filled into the surrounding container up to the level mark 68.
  • the connecting piece 40 for the compressed air supply is connected to a compressed air line, a tap located in front of this connection, not shown in the drawing, initially remaining closed. Vessels to be evacuated are connected to the water jet pumps 8 and 9 at the connections 8a and 9a. If at least one of the taps 59 and 60 is open, the device begins to work when the compressed air valve before the connection 40 is opened.
  • valve position is such that the compressed air gets into the expulsion vessel 2.
  • the compressed air presses on the liquid level and conveys the water upwards via the riser pipe 48 (see FIG. 4).
  • the water pressure presses the piston 7 against the valve seat 54 located on the right and thus closes the riser pipe 49 of the other expulsion vessel.
  • the water flows through the bore 55 to the water jet pumps 8 and 9. The water released by the water jet pumps falls directly back into the container 1.
  • the cylinder 62 When the water level in the expulsion vessel 3 has dropped so far that the float 23 located there sinks, the cylinder 62 is pressurized and the rod 63 is pushed to the left, after which the situation described at the beginning again exists. So while water is expelled from one expulsion vessel with the aid of compressed air, the other expulsion vessel fills via its bottom flap under the effect of the static pressure which prevails in the surrounding container 1.
  • the inflow openings 18 are large in order to ensure that the emptied container is completely filled at the relatively low static pressure before the pressurized container is emptied.
  • the relaxation vessel designated as a whole by 70, is arranged horizontally above the water level.
  • the expansion vessel is a cylindrical container that can be made of metal. Perforated sheets 71 are arranged in the vessel 70, some of which are shown in FIG. 9.
  • a water line 72 is connected, which branches off from the pressure line 56 leading to the water jet pumps.
  • the feed line 72 opens into the vessel 70 by means of a nozzle 73.
  • the jet direction of the nozzle 73 is directed at right angles to the longitudinal direction of the vessel 70 and downwards.
  • the air emerging from the expulsion vessels 2, 3 is introduced into the vessel 70 via a line 74.
  • the line 74 has an outlet opening 74a, the axis of which runs parallel to the longitudinal direction of the vessel 70 and is arranged below the water inlet nozzle 73, but somewhat offset to the right from the latter.
  • the device according to FIGS. 8 and 9 works largely the same as the device according to FIGS. 1 to 7.
  • the only difference is that water is introduced into the expansion vessel 70.
  • the water is finely divided when injected under pressure by tearing the jet and hitting the baffles 71.
  • a further division and distribution in the entire expansion vessel is brought about by the air blasts emerging from the air line mouth 74a.
  • the water is distributed over the perforated sheets 71, which are accordingly generally covered with a film of water.
  • the water is expelled from the vessel 70 together with the air via an exhaust pipe 75.
  • the mouth 75a of the exhaust pipe 75 opens into the surroundings above the water level 76 and is directed downward.
  • the water level in this embodiment is therefore somewhat lower than in the embodiment according to FIGS. 1 to 7.
  • a horizontal part 75b of the exhaust pipe 75 cuts the wall of the vessel 7 at its lowest point. This ensures that no water can collect in the vessel 70.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Compressor (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP79104491A 1978-11-18 1979-11-14 Procédé et dispositif de fonctionnement pour pompe à jet d'eau Expired EP0011286B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104491T ATE494T1 (de) 1978-11-18 1979-11-14 Verfahren und vorrichtung zum betrieb einer wasserstrahlpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782850142 DE2850142A1 (de) 1978-11-18 1978-11-18 Verfahren und vorrichtung zum betrieb einer wasserstrahlpumpe
DE2850142 1978-11-18

Publications (2)

Publication Number Publication Date
EP0011286A1 true EP0011286A1 (fr) 1980-05-28
EP0011286B1 EP0011286B1 (fr) 1981-12-23

Family

ID=6055056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104491A Expired EP0011286B1 (fr) 1978-11-18 1979-11-14 Procédé et dispositif de fonctionnement pour pompe à jet d'eau

Country Status (5)

Country Link
US (1) USRE31592E (fr)
EP (1) EP0011286B1 (fr)
JP (1) JPS5572700A (fr)
AT (1) ATE494T1 (fr)
DE (2) DE2850142A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175247A1 (fr) * 1984-09-12 1986-03-26 BASF Aktiengesellschaft Procédé pour l'obtention de pression réduite, dans des appareils pour la fabrication d'anhydride phtalique et d'anhydride maléique
WO2012046080A3 (fr) * 2010-10-08 2012-06-21 Thermofluidics Limited Appareil et procédés de pompage
US8881499B2 (en) 2011-05-12 2014-11-11 Saigeworks, Llc Under water hydrogen and oxygen powered hydraulic impulse engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6817837B2 (en) 2002-07-19 2004-11-16 Walker-Dawson Interest, Inc. Jet pump with recirculating motive fluid

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE120159C (fr) *
FR300797A (fr) * 1900-01-01
US1327560A (en) * 1918-09-16 1920-01-06 Hutchinson Job Means for cooling liquids
CH97705A (de) * 1921-08-19 1923-02-01 Broggi Vinzenz Mit Druckluft zu betätigende Pumpe.
US2243507A (en) * 1938-12-06 1941-05-27 Neumann Herman Frederik Marcus Displacement pump
US2410354A (en) * 1945-02-17 1946-10-29 Joseph B Meyer Fluid pressure pump
DE1530560A1 (de) * 1965-04-13 1970-01-08 Daimler Benz Ag Fahrzeugkuehlung
GB1345627A (en) * 1971-12-22 1974-01-30 Mcintyre T Prime movers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US475111A (en) * 1892-05-17 Hydraulic air-compressor
AT75041B (de) * 1914-07-04 1918-12-10 Kaelteindustrie M B H Ges Vorrichtung zum Absaugen und Fördern des Kondensates und der Luft aus Kondensatoren.
US2249621A (en) * 1938-04-13 1941-07-15 Schlumbohm Peter Method of and apparatus for air conditioning
US2702664A (en) * 1950-07-31 1955-02-22 Pienaar Theunis Marthin Snyman Air, gas, or like fluid compressor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE120159C (fr) *
FR300797A (fr) * 1900-01-01
US1327560A (en) * 1918-09-16 1920-01-06 Hutchinson Job Means for cooling liquids
CH97705A (de) * 1921-08-19 1923-02-01 Broggi Vinzenz Mit Druckluft zu betätigende Pumpe.
US2243507A (en) * 1938-12-06 1941-05-27 Neumann Herman Frederik Marcus Displacement pump
US2410354A (en) * 1945-02-17 1946-10-29 Joseph B Meyer Fluid pressure pump
DE1530560A1 (de) * 1965-04-13 1970-01-08 Daimler Benz Ag Fahrzeugkuehlung
GB1345627A (en) * 1971-12-22 1974-01-30 Mcintyre T Prime movers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175247A1 (fr) * 1984-09-12 1986-03-26 BASF Aktiengesellschaft Procédé pour l'obtention de pression réduite, dans des appareils pour la fabrication d'anhydride phtalique et d'anhydride maléique
WO2012046080A3 (fr) * 2010-10-08 2012-06-21 Thermofluidics Limited Appareil et procédés de pompage
US10006448B2 (en) 2010-10-08 2018-06-26 Thermofluidics Limited Hydraulic ram liquid suction pump apparatus and methods
US8881499B2 (en) 2011-05-12 2014-11-11 Saigeworks, Llc Under water hydrogen and oxygen powered hydraulic impulse engine

Also Published As

Publication number Publication date
EP0011286B1 (fr) 1981-12-23
JPS5572700A (en) 1980-05-31
DE2961617D1 (en) 1982-02-11
USRE31592E (en) 1984-05-29
DE2850142A1 (de) 1980-06-04
JPH0122480B2 (fr) 1989-04-26
ATE494T1 (de) 1982-01-15

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