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Method for transportation of liquids by steam or compressed air and a device for realization of the methodRelated Patent Categories: Pumps, One Fluid Pumped By Contact Or Entrainment With Another, Liquid Pumped By Supplying Or Exhausting Gaseous Motive Fluid To Or From Pumping ChamberMethod for transportation of liquids by steam or compressed air and a device for realization of the method description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080050248, Method for transportation of liquids by steam or compressed air and a device for realization of the method. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001] The present method for transportation of liquids by steam or compressed gas and the device for realization of the method, according to the invention, could find application in different technical fields, where transportation of water, water solutions, liquid chemicals or condense have to be transported through pipelines and if steam or compressed air are available in the site. BACKGROUND OF THE INVENTION [0002] From the prior state of the art is known the transportation of liquids by electrical or mechanical operated pumps or by steam or compressed air operated pumps. [0003] In most cases the availability of steam or compressed air on the sites determines as more profitable the usage of methods and devices for transportation using steam or compressed air to operate. [0004] The most widely used method for transportation is by pushing the liquid by compressed air or steam. The liquid to be transported has fulfilled a vessel to a determined level. The compressed air or steam act upon the surface of the liquid with a definite pressure. After the determined volume of liquid is transported the pressure on the surface of the remaining liquid drops down to atmospheric, that allows new liquid to enter the vessel. When the level of the liquid reaches a definite value, compressed air or steam feed the vessel and the cycle is repeated. [0005] According to the known method the level at which the liquid fulfills the vessel is one and the same and the volumes of the liquid and the compressed air or steam change proportionally and are corresponding one to the other at every moment during the process. Besides the surface of the liquid remains horizontal at one level and the pressure on the whole surface is equal. [0006] The device for transportation of liquids according to the known method represents a closed vessel with inlet and outlet for the transported liquid and inlet and outlet for the compressed air or steam. Inside the closed vessel a spring assisted float mechanism is mounted. The mechanism is used for automation of the process of feeding and discharging of the liquid and switches two valves-inlet and outlet valve for compressed air or steam. The spring assisted float mechanism is designed to operate the outlet valve and the inlet valve simultaneously. [0007] At the beginning of the process the outlet valve is opened and the inlet valve is closed. [0008] The liquid enters the vessel gravitationally through a check valve, rises the float and the corresponding air is evacuated through the outlet valve. When the position of the float reaches the point corresponding to the determined highest level of the liquid, the spring assisted float mechanism reverses the positions of the valves simultaneously. The compressed air or steam enters the vessel and the liquid is transported through the outlet check valve into the corresponding pipeline. While the liquid is transported the float lowers its position until it passes its trip point corresponding to a determined low level of the liquid and the spring assisted float mechanism reverses the positions of the valves simultaneously and the whole cycle is repeated. [0009] The pumping traps of "Armstrong" Int. USA and "Spirax Sarco" USA, functioning according to this method, cause troubles and malfunctions because of wear and tire. The strength of spring material is dependent of the chemical structure of the liquid. That shortens the exploitation cycle of the devices and raises the cost of transportation of the liquid. DISCLOSURE OF THE INVENTION [0010] According to the present invention the method for transportation of liquids by steam or compressed air is based on the use of variable effective volume of the compressed air or steam. [0011] The method for transportation of liquids is realized by filling up with the liquid a vessel connected to the atmosphere or a pipeline with low pressure and supervened by closing the connection to the atmosphere or the pipeline with low pressure and pushing the liquid by supercharging of a determined volume of compressed air or steam. [0012] According to the invention at least two variable gas volumes V1 and V2 connected in their lower side are differentiated. These gas volumes exert pressure p1 and p2 on the liquid level, which changes on stairs and differently in the different volumes V1 and V2. [0013] The method is realized automatically and consecutively by the following operations: [0014] 1. switching for filling at pressure difference in the volumes V1 and V2 equal to zero-(p1-p2=0); [0015] 2. filling the volumes V1 and V20 with liquid at raising difference in pressure p1 and p2 in the volumes V1 and V2 from zero to a definite value corresponding to a definite fulfilling of the volumes V1 and V2; [0016] 3. switching in regime of pumping when the definite pressure differential between p1 and p2 is reached; [0017] 4. pumping until a definite pressure differential is available. [0018] 5. discharging volumes V1 and V2 and equalizing the pressure p1 and p2 in the volumes until the pressure differential is equal to zero (p1-p2=0); [0019] 6. switching for filling at pressure difference in the volumes V1 and V2 equal to zero-(p1-p2=0) and the cycle is closed. [0020] The method according to one preferable performance of the invention is realized at upper limit of the pressure differential in the range 0.005 bar-0.1 bar. [0021] The device for realization of the method for transportation of liquids by compressed air or steam consists of a closed cylindrical vessel with inlet and outlet for the liquid and inlet and outlet for the compressed air or steam. The inlet and outlet for the liquid are equipped with check valves. The inlet and outlet for the compressed air or steam are equipped with inlet and outlet valves. According to the invention inside the vessel an inner volume, preferably cylindrical, with opened bottom is separated and mounted in parallel with the vessel's axis, free to move vertically. On the top bottom of the cylindrical volume an inside tube with valve inside its top end is mounted. A pipeline connected after the inlet valve for the compressed air or steam provided with a check valve and ending inside in the upper part of the cylindrical volume is installed. The inside valve in the tube is connected by lever mechanism with the outlet valves for compressed air or steam of the vessel. The lever mechanism is in contact with the inlet valve for compressed air or steam. The inside valve, the inlet and outlet valves for compressed air or steam make synchronized movement depending on the changing effective volume and pressure of the compressed air or steam inside the main vessel and the inner volume. Continue reading about Method for transportation of liquids by steam or compressed air and a device for realization of the method... 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