摘要:
A bellows pump device includes a control unit which, before operation of the bellows pump device is started, performs initial control in which solenoid valves are switched and pressurized air is supplied to suction-side air chambers in advance, thereby determining operation air pressures which are air pressures of the pressurized air to be supplied to the suction-side air chambers during the operation. As the initial control, the control unit outputs control commands to electropneumatic regulators so as to gradually increase the air pressures of the pressurized air to be supplied to the suction-side air chambers in advance, and when detection signals resulting from detection of expansion positions of the bellows are inputted from the proximity sensors to the control unit, the control unit determines the air pressures of the pressurized air supplied to the suction-side air chambers at that time as the operation air pressures.
摘要:
A vacuum pump includes a hollow container that has a vacuum port and internal chamber walls. The vacuum port opens to an exterior of the container and the chamber walls define chambers that are in fluid communication with the vacuum port. There are flexible bladders disposed in the chambers. The flexible bladders include vents that open through the container to the exterior. A plunger in the container includes arms that extend into the chambers such that each of the flexible bladders is situated between one of the arms and one of the chamber walls. The plunger is moveable between a home position and an upstroke position to compress and deflate the flexible bladders via the vents and thereby change the volume of the flexible bladders. The change in the volume draws a vacuum through the vacuum port.
摘要:
The invention relates to a pump device for pumping a liquid, comprising a hydraulics housing (12, 212), in which a pump ring (14, 214), a pump ring support (16, 216) and an eccentric (18), which can be driven by a shaft (20), are accommodated. The hydraulics housing (12, 212) has an annular portion (22, 222) and a first and a second lateral section (24, 26, 224), the two lateral sections (24, 26,224) being arranged opposite each other. The pump ring (14, 214) is mounted between the two lateral sections (24, 26, 224) of the hydraulics housing (12, 212) at least in some portions. On a side facing away from the pump ring support (16, 216), two first projections (28, 228), which run in the axial direction of the shaft (20), are each in contact with one of the two lateral sections (24, 26, 224).
摘要:
A pump is disclosed which includes a pump body, a silencer connected to the pump body, and a condensation preventing device surrounding the silencer. A liquid supplying apparatus is also disclosed which includes the pump for providing a power to supply the liquid to outside, and a storage tank for storing a liquid.
摘要:
A hydraulically driven diaphragm pumping machine (“pump”), in particular for water and difficult-to-pump materials, comprises at least two side-by-side pumping units. Each pumping unit comprises a hydraulically-driven pump cylinder (1,2) and a separate non-pump hydraulic drive cylinder (9,10). The pump cylinder (1,2) has a lower first end with a first inlet and outlet for fluid to be pumped and an upper second end with a second inlet and outlet for hydraulic fluid. The pump cylinder (1,2) contains a bellows (3,4) closed at its lower end and open at its upper end for communication with hydraulic fluid. The outside of the bellows (3,4) defines a space for fluid to be pumped. The bellows (3,4) of the pump cylinder (1,2) is arranged to be driven by hydraulic fluid supplied at its top end, in concertina like expansion and contraction to pump the fluid to be pumped adjacent the lower first end of the pump cylinder (1,2). The hydraulic drive cylinder (9,10) is placed side-by-side the pump cylinder (1,2). The hydraulic drive cylinder (9,10) has a lower first end associated with a hydraulic drive an upper second end containing hydraulic fluid communicating with the upper second end of the pump cylinder (1,2). The hydraulic drive terminates at its upper end with a drive piston (19,20) slidably mounted in the hydraulic drive cylinder (9,10). The hydraulic drives of the hydraulic drive cylinders (9,10) of the two pumping units are connected by a hydro-mechanical connection (25,27) designed to control drive of the hydraulic fluid to advance and retract the pistons (19,20) of each hydraulic drive cylinder (9,10).
摘要:
An electrochemically actuated pump and an electrochemical actuator for use with a pump. The pump includes one of various stroke volume multiplier configuration with the pressure of a pumping fluid assisting actuation of a driving fluid bellows. The electrochemical actuator has at least one electrode fluidically coupled to the driving fluid chamber of the first pump housing and at least one electrode fluidically coupled to the driving fluid chamber of the second pump housing. Accordingly, the electrochemical actuator selectively pressurized hydrogen gas within a driving fluid chamber.
摘要:
A gas extraction system for gas analysis is provided. The gas extraction system includes the use of a peristaltic pump for moving condensates to a liquid trap assembly. An improved fluid flow is thus provided, which includes delivering condensate from a condensate separator to a peristaltic pump and delivering the condensate from the peristaltic pump to a liquid trap assembly.
摘要:
Provided is a microchip having a liquid supply mechanism which can supply a solution in a micro flow path with a simple construction in which a drive source utilizing an osmotic pressure is arranged within the microchip and which controls the osmotic pressure by a control unit utilizing temperature or the like, whereby it is possible to effect drive control such as intermittent driving and continuous driving at a fixed velocity. The liquid supply mechanism using osmotic pressure includes an osmotic pump utilizing the osmotic pressure of a liquid filling chambers separated from each other by a semipermeable membrane, and a unit which varies the osmotic pressure by changing a condition of the solution in at least one of the chambers on the basis of a timing of a pumping operation.
摘要:
A staged peristaltic pump system and related methods are disclosed. The system may be configured such that the working fluid pressure differential across any individual stage of the system is smaller than the pressure across the entire system. In some embodiments certain components of each stage may be sealed from fluid communication with an external environment, though working fluid may be configured to cross the boundary of the seal. In some embodiments, stages may be pressurized with respect to an external environment.
摘要:
A tubular pumping element for pumping a liquid is disclosed. The tubular pumping element includes an outer shell that has a bore with an inlet and an outlet at opposite ends of the bore. There is a flow path for the liquid from the inlet through the bore to the outlet. A support element is located within the bore of the outer shell. An elastic sleeve is located over the support element and has a plurality of expandable portions. The support element includes a plurality of fluid passages each coupled to a respective port on the surface of the support element under one of the plurality of expandable portions of the elastic sleeve. Introduction of a driving fluid into one of the fluid passages causes the expandable portion of the elastic sleeve that is proximate to the respective port to expand.