摘要:
An automatic pump control device for an injection pump used to inject fluid (typically methanol) into oil or natural gas wells to prevent freezing. The device enables the pump to operate at rates as low as one full stroke per 1.5 minutes (i.e., 0.67 stroke/min), substantially slower than current rates of approximately fifteen strokes per minute. The device comprises a main body; an extension air pilot; a retraction air pilot; a toggle mechanism that actuates the extension air pilot to extend the pump piston, that at the end of the extension stroke actuates a retraction air pilot to retract the pump piston, and that automatically continues the two stroke cycle; a drive mechanism for driving the toggle mechanism; an overstroke mechanism to prevent over driving the retraction air pilot at the end of its stroke; an optional stroke speed adjustment valve; a circuit to circulate and transport a gas; and piston, spool, and sleeve for switching the path of the gas. The automatic pump control device operates over a wide range of flow rates and pressure ranges, thus enabling installation of the automatic pump control device to virtually all manufacturers' injection pumps.
摘要:
A pump for boosting pressure of liquid color for injection into plastic resin in molding or extrusion apparatus includes a housing having a first bore extending in a first direction and second and third bores extending through the housing and communicating with the first bore proximate a first end of the first bore with the first end of the first bore being blind. The pump further includes an inlet check valve connectable to the second bore for permitting liquid flow through the second bore into the first bore. Further included is an outlet check valve connective to the third bore for permitting liquid flow out of the first bore through the third bore. A member is reciprocally axially movable within the first bore. A solenoid applies air pulses to the end of the first member facing oppositely from the blind end of the first bore.
摘要:
A powder conveying pump, in particular for a powder coating device. The pump comprises a working chamber with a variable working chamber volume, a powder inlet opening into the working chamber to suck powder into the working chamber, a powder outlet opening out of the working chamber to expel the powder present in the working chamber and a moveable piston that forms one boundary surface of the working chamber and sucks the powder into the working chamber through the powder inlet during an upward movement. The piston is driven directly by pneumatic means.
摘要:
A metering pump for the direct metering of active compounds, in particular for agricultural technology, includes having at least one housing with a delivery space, a reciprocating element, which bounds the delivery space at least on one side and is arranged movably in the housing, at least one suction valve connected in terms of flow to the delivery space, and at least one outlet valve connected in terms of flow to the delivery space. The reciprocating element is designed as a piston which can be displaced between two end positions, and an elastic ring is provided between housing and piston, which ring is at least partially compressed in both end positions of the piston.
摘要:
A pneumatically operated oil pump comprises an outer tube for extending into an oil tank and a sucking tube moveably arranged within the outer tube. The sucking tube includes one-way valve establishing an airtight arrangement with respect to an inner wall of the outer tube. An air operated device is arranged on top of the outer tube and interconnected to the sucking tube located within the outer tube. The device includes an upper operating chamber and a lower operating chamber intercommunicated with an air pipe. The device further includes a movement reciprocally moved within the device when compressed air is introduced into the device so as to move the sucking tube reciprocally.
摘要:
A pneumatic oil pump has a cylinder, a piston, a pedal and an oil reservoir. The cylinder has a central bore, a sealed front end and a sealed rear end. An air connector is mounted in a cover on the front end of the cylinder. An actuating valve is mounted in the cover on the front end of the cylinder and communicating with the air connector and the central bore of the cylinder. The piston is movably mounted in the bore of the cylinder to divide the central bore of the cylinder into a first chamber and a second chamber. A piston seat is attached to the piston at an end facing the rear end of the cylinder. A ventilative, sound-absorbing material is arranged between the air outlets of the piston and the piston seat. By such an arrangement, the shock of the air flow can be absorbed by the ventilative, sound absorbing material. Therefore, noise and shock will not occur when the pneumatic pump is in operation.
摘要:
A pump is adapted for discharging a very small quantity of a liquid and has a discharge port opening and shut valve, discharge element and liquid drawing passageway opening and shut valve. The discharge port opening and shut valve includes a rod-shaped element which can advance to and retract away from a discharge port. The tubular discharge element and opening and shut valves mate relatively movably with each other coaxially with the rod-shaped element on the cylindrical surface of the red-shaped element. The advancement of the discharge element discharges the liquid which has been introduced into the liquid drawing passageway and regulated by the opening and shut valves to a predetermined amount.
摘要:
A drive for a lubrication pump for a centralized lubrication system of utility vehicles, including trailers, semi-trailers, special vehicles and the like. The lubrication pump is used for lubricants which are difficult to press and have a high penetration. The lubrication pump includes an agitator mounted in a lubricant container and an eccentrically driven delivery piston transporting the lubricant. The agitator and the eccentric member are mounted on a common drive shaft. The drive for the lubrication pump is a pneumatic drive and is controlled by an explosion-protected magnetic valve.
摘要:
A portable suction pump for life-saving purposes and normally driven by compressed gas. The pump includes a pump assembly having a suction chamber with an outlet leading to the ambient atmosphere and an inlet communicating with a secretion-receiving reservoir with attached tubing permitting suction of secretion, primarily from the air ducts of an unconscious patient. The pump is characterized by the pump assembly having a housing enclosing the suction chamber and closed at one end by a first annular diaphragm and, centrally sealingly attached thereto, a rigid body guided for movement relative to the housing and having wall portions defining, together with part of the housing, a motor chamber delimited from the suction chamber by a second annular diaphragm. The motor chamber communicates with a driving gas supply and exhaust connections and a valve arrangement for the intake and exhaust of compressed driving gas.
摘要:
A compressed-air operated dispenser for continuously dispensing a substance enclosed in a container, and in particular a viscous or paste-like substance, comprising an outlet passage extending from container to an outlet; a valve which normally closes the passage; a compressed-air operated piston arranged to exert pressure on a substance in the passage and to open the valve; and a trigger means for initiating the supply of compressed air for the purpose of operating said piston.In accordance with the invention there is provided a second valve arranged to move the piston to a starting position in which a pressure-actuating chamber is closed on one side of the piston with the exception of a passage through which compressed air can be forced into the chamber to cause the piston to move to a first terminal position. In this position the substance is subjected to pressure and the valve is opened and the piston ceases to act on the second valve. An air-return passage is opened to cause the second valve to be moved to a second position, in which an exhaust hole for compressed air in said chamber is placed in communication with atmosphere and the piston returns to a second terminal position in which it causes the second valve to return to its starting position.