Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
  • F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped

Definitions

• 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.
• 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.
• the pressure on the surface of the jemaining liquid drops ⁇ down " to atmospheric, thaf allows new liquid to enter the vessel.
• compressed air or steam feed the vessel and the cycle is repeated.
• 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.
• the device for transportation of liquids 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 inside the closed vessel. 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.
• the liquid enters the vessel gravitationally through a check valve, rises the float and the corresponding air is evacuated through the outlet valve.
• 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.
• 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.
• 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.
• 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.
• variable gas volumes Vl and V2 connected in their lower side are differentiated. These gas volumes exert pressure pi and p2 on the liquid level, which changes on stairs and differently in the different volumes Vl and V2.
• the method is realized automatically and consecutively by the following operations:
• 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.
• 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.
• 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 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.
• the lever mechanism is designed, as the inside valve is solid- coupled with the outlet valve for compressed air or steam.
• the lever is a metal rod with a hole at one end to operate the coupled valves and hinge joint at the other to connect the wall of the vessel. At the same time a possibility for rotation of the rod, limited by a screw support is ensured.
• the thrust of the inlet valve for compressed air or steam is installed to slide on the surface of the rod. This way a synchronized movement of the inside valve and inlet and outlet valves for compressed air or steam is achieved.
• the device according to the invention is equipped with a tube, axially mounted on the bottom of the vessel and the inside tube of the cylindrical volume is bearing with it allowing movement in vertical direction.
• the device for transportation of condense by steam is provided with an additional tube connected to the inlet steam tube before the inlet valve and ending in the upper part of the cylindrical volume.
• the free end of the tube is provided with an additional float steam valve to ensure maximal level of liquid inside the cylindrical volume mounted axially inside the vessel.
• the float vaTve opens and additional steam enters to lower the level.
• the liquid to be transported enters gravitationally the vessel through the inlet check valve for liquid and fills simultaneously the vessel and the cylindrical volume and the air or steam inside the cylindrical volume is evacuated through the opened inside valve until the level reaches the lower opening of the installed tube.
• the further entering of liquid lifts the cylindrical volume and because of its vertical movement the valve installed in it closes and the lever mechanism to which is connected starts to close the outlet valve and open the inlet valve for compressed air or steam.
• the inlet valve transmits compressed air or steam through the tube and the check valve inside the cylindrical volume.
• the raise of the inside pressure additionally lifts the cylinder and fully switches the inlet and outlet valves for compressed air or steam.
• the inlet valve is now fully opened and the outlet- fully closed.
• the raised pressure inside the vessel closes the inlet check valve for the liquid and ejects the liquid through the opened outlet check valve and the level of the liquid inside the cylinder and the vessel drops.
• the method for transportation of liquid by compressed air or steam according to the invention and the device for realization of the method by means of separation of two gas volumes / in the vessel and in the opened bottom cylinder with variable effective volume/ of the compressed air or steam realizes discharging of the liquid and ensures smooth operation during the whole cycle, compared to the known method.
• the proposed device according to the invention for transportation of fluids :
• Fig.2 the vessel from fig.l in the regime of filling both volumes Vl and V2 and raisin the level of liquid in them
• Fig.3 the vessel from fig.l in the regime of switching the inlet and outlet valves at reaching the prescribed top level of liquid
• Fig.4 the vessel from fig.l in the regime of start up of supplying compressed air or steam and start up of transportation of the liquid
• Fig.7 device for transportation of condense by steam at the start up of the condense supply
• Fig.l shows the regime of switching to "filling"
• Both volumes are fulfilled with gas.
• the liquid is filling the vessel to the level of the lower edge of the baffle 2.
• the pressures pi and p2 in the volumes Vl an V2 are equal to the atmospheric pressure and the pressure difference is equal to zero. This pressure difference supports valves 3 and 5 opened and valve 4 closed.
• Fig.2 shows the process of filling of the two volumes with liquid
• the inlet check valve is opened by the gravitational thrust of the incoming fluid, which fulfils simultaneously both volumes, pushing out the ⁇ gas through the opened_yalves 3, _ 5 ⁇
• the level of the liquid raises equally in both volumes till reaching the level of valve 5.
• the pressure in both volumes is one and the same and equal to the atmospheric pressure and the pressure difference between both volumes is equal to zero.
• Fig.3 shows the regime of fulfilling of the opened volume with liquid.
• the fulfilling of the opened volume V2 continues till reaching a definite maximal level and the pressure in it p2 stays equal to atmospheric.
• the gas cannot be evacuated and influenced by the higher liquid column in the opened volume its pressure raises till reaches a value corresponding to the maximum liquid column in the opened volume V2, while the liquid level in the closed volumeVl raises slightly.
• the pressure difference raises from zero to a value determined by the definite maximal level of the liquid in the opened volume V2.
• Fig.4 shows the regime of switching into the process of supercharging /pumping/.
• Fig.5 shows the regime of pumping the liquid out of the volume connected with the compressed gas.
• inlet valve 4 Through inlet valve 4 the compressed gas enters the volume raising the pressure in the whole vessel which closes the inlet check valve 6 and opens the outlet check valve 7 for the liquid.
• the level of the liquid in the volume Vl connected to valve 4 for compressed gas starts dripping and the pressure of the compressed gas defines the pressure in it.
• the level of the liquid in the volume V2 connected with valve 3 changes slightly and the pressure in it raises by the influence of the compressed gas.
• the pressure difference between the two volumes is defined by the difference of the liquid levels in them and it raises together with the increase of the difference in levels. The process continues till the liquid level in the volume connected with valve 4 reaches the lower edge of the baffle 2.
• Fig.6 shows the regime of discharging of the vessel to the level of the lower edge of the baffle.
• valves 3,4 and 5 switches valves 3,4 and 5 ,as valves 3 and 5 switch to opened position and valve 4 - to closed, that corresponds to the start-up process on Fig.l.
• the device for transportation of condense according to the invention in a preferred embodiment is shown in outline on Fig.7 and the operation of the device for realization of the method is shown on figures 7 to 13.
• the device represents a closed cylindrical vessel 1 with vertically mounted on its axis a cylinder with opened lower bottom, with connected to the upper bottom tube 10 with side openings in the lower part and installed inside valve 5, ensuring changeable effective volume.
• the cylinder is free to move only in vertical direction.
• the flap of the installed inside valve 5 is axially connected to the flap of the outlet valve 3 /mounted vertically in the center of flange 8 of vessel 1/ by rod 17.
• the rod 17 is executed with transverse groove where the fork shaped end of lever 9 enters.
• the other end of the liver 9 is connected with hinge joint to the side wall of the vessel 1 with support to limit its down end position.
• the inlet steam valve 4 is mounted vertically on flange 8 with axis in the plain determined by the axis of the lever 9 and the axis of the outlet valve 3 and the heel of its flap in closed position touches the upper surface of the liver 9.
• the lower part of the inlet valve seat is formed with an additional opening and in opened position of its flap, part of the steam is directed into the upper part of the vessel 1 and the rest through the pipeline 11 with a check valve 12 is directed inside the cylinder 2.
• a pipeline with float valve is installed inside the cylinder to limit the maximum level of condense.
• an inlet check valve 6 and an outlet check valve 7 for condense are installed.
• Fig. 7 The device at the start of fulfilling the vessel with condensate.
• the condense is entering the lower part of vessel 1 through the check valve 6 opened by the gravitational force of the condensate. It evacuates the air out of the cylinder 2 through the orifices of the inner tube 10 and the opened internal valve 5 and also from the vessel 1 through the opened outlet valve 3.
• the inlet valve 4 and the check valve 12 are closed.
• the outlet check valve 7 is_closed because of the back ⁇ pressure of the condense.
• the float valve 14 is closed by its own weight.
• the opened cylinder 2 is in its end down position and the lever 9 is also in its end down position. The process continues until the condense level reaches the orifices of the tube 10 in the cylinder 2.
• the cylinder 2 When the level of the condense surpasses the the level of the orifices of the tube 10, the cylinder 2 lifts as the air (pesp. the steam) inside it can no longer be evacuated through tube 10 because the condense level has closed its orifices.
• the inside valve connected to lever 9 is closing.
• the lever 9 doesn't change the position of the inlet valve 3 and outlet valve 4 because the steam pressure holds the thrust of valve 4 in its down position.
• the level of condense raises, which raises the lifting power of the cylinder 2.
• Fig. 9 The device reaching the definite highest level of condensate inside the cylinder 2 and when supercooled condense enters the vessel.
• Fig. 11 The device at discharging the condense.
• Fig. 13 The device at switching into a process of fulfilling.
• the discharging of the condense is completed.
• the pressure inside the vessel 1 drops to atmospheric and the outlet valve closes by the force of the back pressure inside the condense pipeline.
• the inlet valve 6 opens because of the gravitationally incoming condense. The cycle is completed and starts the next cycle of filling - discharging.
• the proposed method and device for transportation of liquids by compressed air or steam could be applicated in all industrial plants to transport either condense or other liquids, replacing the existing rapidly wearing devices with spring supported mechanisms, and at the same time ensuring smooth and throuble-free performance of the equipment.
• One of the preffered applications of the method is for constructing of water pumps for drill wells where the horisontal section is limited if compressed air is availabe on the site.
• the method and device could have application as cheep solution for constructing of dozing units for liquids if no high accuracy is required .
• a specially prefferable application of the method and the device is constructing pumps for flamable and explosion risk liquids at a corresponding choice of material, as during the operation of the device hit loaded parts are eluded.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Jet Pumps And Other Pumps (AREA)
• Thermotherapy And Cooling Therapy Devices (AREA)
• Engine Equipment That Uses Special Cycles (AREA)

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• 2004
  • 2004-11-19 BG BG108942A patent/BG108942A/xx unknown
• 2005
  • 2005-11-10 AT AT05815080T patent/ATE418012T1/de not_active IP Right Cessation
  • 2005-11-10 WO PCT/BG2005/000017 patent/WO2006053409A1/en active Application Filing
  • 2005-11-10 DE DE602005011861T patent/DE602005011861D1/de not_active Expired - Fee Related
  • 2005-11-10 EP EP05815080A patent/EP1841968B1/de not_active Not-in-force
  • 2005-11-10 US US11/667,982 patent/US20080050248A1/en not_active Abandoned

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