Abstract:
The invention relates to an infusion pump (10) for continuously conveying a fluid, comprising an inlet (20), an outlet (30), a first piston (40) movably supported in a first chamber (50), and a second piston (60) movably supported in a second chamber (70), characterized by a connecting channel (80) that connects the first chamber (50) to the second chamber (70), the first chamber (50) being connected to the inlet (20) and the second chamber (70) being connected to the outlet (30), at least one control element (90), which in a first position connects the inlet (20) to the first chamber (50) and in a second position connects the first chamber (50) to the second chamber (70) in a communicating manner, wherein in the first position the communication between the first chamber (50) and the second chamber (70) and in the second position the communication between the inlet (20) and the first chamber (50) is blocked, a controller that acts upon the first piston (40), the second piston (60), and the control element (90) so that, when the control element (90) is set in the first position, the first chamber (50) is filled while the second chamber (70) is drained by means of the outlet (30) at a predefined flow rate, and when the control element (90) is set in the second position, the first chamber (50) is drained and the second chamber (70) is filled, wherein the constant discharge by means of the outlet is maintained at the defined flow rate.
Abstract:
Bei einer Mehrzylinder-Dickstoffpumpe (1) zum Fördern insbesondere von Beton, deren mindestens zwei Förderzylinder (3, 5) den Dickstoff aus einem Vorfüllbehälter (7) in eine Förderleitung fördern und der ein Umschaltventil (9) zum alternierenden Verbinden der Förderzylinder mit der Förderleitung zugeordnet ist, das mindestens zwei drehbewegliche Ventilkörper umfasst, die jeweils einen Leitungsabschnitt (15L, 17L) zwischen jeweils einem der Förderzylinder und der Förderleitung umfassen und stromab der Förderzylinder an ein Sammelrohr (19) angeschlossen sind, umfasst das Umschaltventil (9) erfindungsgemäß mindestens, jedoch bevorzugt zwei im wesentlichen rotatorisch bewegbare Drehschieber (15, 17; 15', 17'; 15", 17"), deren jeder einen zum Verbinden des ihm jeweils zugeordneten Förderzylinders (3, 5) mit der Förderleitung vorgesehenen geraden Leitungsabschnitt (15L, 17L) sowie mindestens einen die Verbindung sperrenden Abschnitt umfasst. Es wird auch ein Verfahren zum Betreiben dieser Dickstoffpumpe zu kontinuierlichem Förderbetrieb beschrieben.
Abstract:
Drehschieberanordnung (1) zum Einstellen von mindestens einem Durchströmungsquerschnitt, mittels eines Drehschiebers (4), der je nach Drehwinkelstellung mit jeweils einem an einem Gehäuse (10) der Drehschieberanordnung (1 ) ausgebildeten Zulauf (11) und einem Ablauf (12) für ein flüssiges Medium zusammenwirkt, wobei die Drehwinkelverstellung indirekt über eine Hubkolbenpumpe (16) erfolgt, welche mittels eines Schaltmagneten (2) betätigt wird.
Abstract:
A fluid pumping device comprising a pump housing (1; 101; 201; 301; 701; 901) containing a piston chamber (11; 101 '; 201 '; 310a, 301b; 701 '; 901 ' ) and a piston (2; 102; 202; 302, 302 '; 702; 902, 902 " ) moving back and forth inside the piston chamber, an inlet port (10i; 110i; 210i; 310i; 710i; 921) and an outlet port (10o; 110?; 210o; 310o; 710o; 920) allowing a fluid to be sucked into the piston chamber during an instroke of the piston and expelled from the piston chamber during an outstroke. The device further comprises a valve - switching element (9; 109; 201; 309; 701; 909 ) movably mounted against a valve base member (7; 107; 207; 307; 707; 907), which comprises a piston chamber aperture (12p; 112p; 212p; 312p, 312p 1; 712p; 912p) connected to the piston chamber and an inlet aperture (12i; 112i; 212i;312i;712i;912i) and an outlet aperture (12o; 112o; 212o; 312o; 712o; 912o) connected respectively to the inlet and outlet ports of the fluid pumping device. The element comprises a groove (14; 114; 214; 314, 314 '; 714; 914) or other recess (514) moving against the valve base member such that, a first communication allows leakage between the inlet aperture and the piston chamber aperture so that fluid is sucked from the inlet port, through the groove or recess, into the piston chamber during part of the piston instroke, while a second communication allows leakage between the piston chamber aperture and the outlet aperture expelling fluid out of the piston chamber, through the groove or recess and the outlet port during part of the piston outstroke.
Abstract:
There is described a fluid pumping device comprising a pump housing (1; 101; 201; 301; 701; 901 ) containing at least one piston chamber (11; 101 '; 201 '; 310a, 301 b; 701 '; 901') and at least one piston (2; 102; 202; 302, 302'; 702; 902, 902") arranged to move back and forth inside the piston chamber, at least one inlet port (10i; 110i; 210i; 310i; 710i; 921 ) and at least one outlet port (10o; 110o; 210o; 310o; 710o; 920) arranged so that a fluid can be sucked through the inlet port into the piston chamber during an instroke of the piston and expelled from the piston chamber through the outlet port during an outstroke of the piston. The fluid pumping device further comprises a valve-switching element (9; 109; 201; 309; 701; 909) that is movably mounted against a valve base member (7; 107; 207; 307; 707; 907), said valve base member comprising at least one piston chamber aperture (12p; 112p; 212p; 312p, 312p'; 712p; 912p) connected to the piston chamber and at least one inlet aperture (12i; 112i; 212i; 312i; 712i; 912i) and at least one outlet aperture (12o; 112o; 212o; 312o; 712o; 912o) connected respectively to the inlet and outlet ports of the fluid pumping device. The valve-switching element comprises at least one groove (14; 114; 214; 314, 314'; 714; 914) or other recess (514) arranged to move against the valve base member such that, said groove or recess creates a first communication allowing leakage between the inlet aperture and the piston chamber aperture so that fluid is sucked from the inlet port, through the groove or recess, into the piston chamber during at least a part of the piston instroke, while said groove or recess creates a second communication allowing leakage between the piston chamber aperture and the outlet aperture so that fluid is expelled out of the piston chamber, through the groove or recess and the outlet port during at least a part of the piston outstroke.
Abstract:
A dosing pump comprises an inlet for a solvent, an injection device for an additive, a reciprocating main piston for mixing the solvent with the additive during a suction stroke and for discharging the mixture from an outlet in an evacuation stroke. A divider substantially perpendicular to a rod connected to the main piston separates a main piston housing from a switching device for controlling a main piston stroke direction. The switching device comprises two inlet rotary valve assemblies that are disposed externally to a corresponding inlet aperture bored in the divider when in an opened state and are rotatable about an axis substantially perpendicular to the axis of the main piston. Each of the valve assemblies alternately opens and occludes a corresponding inlet aperture so that solvent flowing through a first inlet aperture performs a suction stroke and solvent flowing through a second inlet aperture performs an evacuation stroke.
Abstract:
Embodiments of the present invention are directed to devices and methods for propelling fluids that feature at least one first pump assembly having a primary pump, an accumulator pump, drive means, valve means and control means. The valve means moves between the first position and the second position as the accumulator pump and primary pump alternate between a loading movement and a pump movement. The control means is in signal communication with the accumulator pump, the primary pump and the valve means. The control means issues signal command to the accumulator pump to assume the loading movement and the pump movement and the primary pump to assume the loading movement and pump movement in coordination with the movement of the valve means such that fluids are propelled from the first outlet.
Abstract:
A servo driven dispensing pump is provided for dispensing a precise quantity of liquid. The dispensing pump includes an inlet for receiving a supply of liquid, an outlet for dispensing a metered amount of liquid, and a flow control valve for controlling liquid flow between the inlet and outlet. The pump has a cavity in communication with the control valve for receiving a metered amount of liquid, and a plunger disposed within the cavity for controlling the amount of liquid within the cavity. The pump further has a servo driven linear actuator for actuating the plunger within the cavity. The servo driven linear actuator comprises an electric motor and a rotary-to-linear converter.
Abstract:
A dispensing pump (10) includes first and second sleeve assemblies (11, 12). Each sleeve assembly includes a rotary valve (17) having an input and output position and a longitudinally displaceable piston (15, 16) that moves between a first position abutting the valve and a second position displaced from the valve. The sleeve connects to a manifold (13) with input and output passages (21, 24) that align with input and output apertures (20, 23) in the sleeve. Withdrawing the piston with the input port (18) of the valve aligned with the input aperture draws material into the sleeve. Moving the piston toward the valve in the output position with the output port (19) aligned with the output passage displaces material from the manifold.
Abstract:
A positive-displacement pump for fluid products, in particular paints, colorants and the like, comprises a pump body (2) in which there is formed a pumping chamber (3), in which a piston (5) is mounted for sliding and is controlled so as to advance and withdraw in order to vary the useful volume of the pumping chamber (3). The pumping chamber (3) extends in accordance with a longitudinal axis (X-X) which is inclined, in a non-vertical manner, with respect to a horizontal plane and having an upper region (42) which is positioned at a greater height with respect to a horizontal plane and in the region of which the pumping chamber (3) is placed in communication with at least one intake pipe (33) of a fluid product.