Pumps – One fluid pumped by contact or entrainment with another – Jet pump with motive fluid generating pump
Patent
1996-07-19
1998-08-04
Izaguirre, Ismael
Pumps
One fluid pumped by contact or entrainment with another
Jet pump with motive fluid generating pump
F04B 3504
Patent
active
057884641
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention involves a device for suction in a fluid medium and a process for suction in a fluid medium.
BACKGROUND OF THE INVENTION
In particular technical areas, suction devices that show strong suction behavior while immersed in a fluid are needed. It is often necessary that particles can also be sucked in. Water vacuum cleaner equipments applied to date are large in size that they are quite impeded under narrowly confined conditions. This is particularly true if narrow openings or borings should be vacuumed.
From the GB 2 219 351 A, a fuel pump is known with a primary outlet and a secondary outlet. The secondary pump outlet transports fuel under pressure through a nozzle to a tube to suck vapor and fuel through the tube in an upper chamber.
In the DE-PS 38 12 206, a device for cleaning wells is disclosed, which is operated through a pressurized driver pipe with a separation element that includes a jet pump, which is lowerable into a well.
A device is proposed in the DE-OS 40 37 899 for cleaning a well pipe and the filtering area in a water well consists of a well pipe with a hole or a slit and an operational area, as well as a suction/pressure pump and a pressure pump.
In SU-A-899 809, a water collecting well is disclosed, which is equipped with a pump system. The pump system includes a motor pump, which feeds a venturi tube, and suction and pumping tubes.
The FR-A-2 581 427 describes a jet pump that consists of minimum two parts, so that it can be brought to an operational place in a tube (Through Flow Lines Technic). The jet pump is surrounded by a ring-form area that serves to lead a driver medium.
The JP 60-173 400 suggests to produce a jet pump in a form of a main tube with a suction opening and a by-pass opening, where numerous high pressured water injection nozzles are arranged near the suction opening in the body of the tube.
SUMMARY OF THE INVENTION
The object of the present invention is to improve the above described situation, particularly to provide a possibility of suction that is suitable in special ways for tubes and elongated hollow areas, particularly in narrow combustion chambers and cooling systems.
The invention consists of a suction device with an arrangement of driver pump and jet pump and a process for suction, as defined in the claims.
BRIEF DESCRIPTION OF DRAWINGS
In the drawings, preferred embodiments of the invention are illustrated. They show:
FIG. 1 a schematic sectional view of a device according to the present invention;
FIG. 2 a partial view, partly in section, of the suction portion of a device according to the present invention;
FIG. 3 a partial view, partly in section, of the jet pump portion of a device according to the present invention; and
FIG. 4 a sectional view of the device shown in FIG. 3 along C--C.
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the invention in a device, as presented in FIG. 1, includes a jet pump (1) that produces the desired suction effect on a suction gap (3). A driver pump (2) transports a fluid medium from outside of the device, e.g. water, to lead it under pressure of the jet pump (1). A conventional underwater pump, for example, like a mechanical rotor pump, preferably a pump with an electric motor gear, or a multistage pump can be placed as a driver pump (2). This way, the driver pump (2) has a separate inlet (9), which exclusively serves to supply the driver pump (2). The jet pump has a suction chamber (6), which surrounds the suction gap (3). Further, the jet pump (1) contains its own jet pump inlet (18), constructed by suction tubes (21), which is not intended for the driver pump (2). It serves to transport the created suction effect on the suction gap (3) in the suction chamber (6).
Additionally, a pressure joint (5) is intended as the common outlet for all the mediums transported by the driver pump (2) and sucked in by the jet pump (1). Preferably, a direct backflow of the discharging medium to the driver pump (2) through the pressure joint (5) does not exist. By the
REFERENCES:
patent: 2583374 (1952-01-01), Hoffman
patent: 4183722 (1980-01-01), Roeder
patent: 4212595 (1980-07-01), Kuintzle, Jr. et al.
patent: 5080560 (1992-01-01), LeRoy et al.
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