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
  • F04F1/02—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating

Definitions

• the invention relates to a device for conveying flowable materials according to the preamble of patent claim 1 and a method thereof.
• EP 0 937 004 A discloses a device for pneumatically conveying pulverulent substances with a container connected to a supply line and a discharge for the conveyed material, which is separated by at least one plate-like filter element from a space connected to a vacuum line; the width of the filter element corresponds at most to the diameter of the container.
• a substance of specific gravity of 0.1 to 15.0 g / cm 3 and with a particle size range between 0.1 to 300 .mu.m as conveyed is the ratio of the length of a pumping chamber forming container for temporarily receiving the conveyed to its inner Diameter between 0.5 and 10.0 and the plate-like filter element is provided between a vacuum line of a vacuum pump for sucking the conveyed material and the pumping chamber.
• a conveying gas line of a conveying gas source connects to the space connected to the vacuum pump, and an automatic blocking element is arranged in each case in the vacuum line as well as in the conveying gas line.
• EP 0 538 711 A discloses a conveying device for plastic granules, for example, with a hose line which at one end dips into a storage silo by means of a lance and at the other end protrudes through a filter carrier into a pipe socket which rests on the box-like inlet of a tangential intake opening of a plasticizing cylinder sitting.
• a suction chamber About the filter support a likewise penetrated by the hose line cover assembly is provided with a suction chamber. The latter has suction openings directed towards the pipe socket and is in operative connection with a nozzle system to which compressed air or compressed gas can be supplied as working medium.
• the suction chamber In the suction chamber is a produced relatively high negative pressure, which propagates through the suction openings and the filter in the pipe socket and from there through the hose into the storage silo.
• that working medium By increasing its speed in the material to be conveyed, that working medium should generate such a high pressure that the solids are sucked into that box-like inlet while being mixed with a stream of suction air.
• the solids are separated from the suction air stream and this mixed with the working fluid. Filter cleaning can not be performed during the process.
• Such conveying devices are tailored to a specific product, that is to say to the conveying of powders or the conveying of liquid.
• some diaphragm pumps can deliver powder and liquids, efficient powder handling is only possible to a limited extent, and only if the substance is specially adapted to the process.
• suspensions are difficult in that the powder in a suspension tends to deposit in the tubes or shutters, resulting in blockage of the delivery system.
• the inventor has set the goal to provide a device and a method of the type mentioned, which not only allow the delivery of products as different as liquids, powders and even suspensions or pastes with the same equipment, but also their volumetric dosage.
• the inventive device comprises in a vertically elongated cylindrical pump chamber for conveying liquids, powders, suspensions and pastes in the upper region thereof means for separating liquid and powder with a filter element and a floating body disposed above as a sealing element, wherein the pump chamber in its at least one feed line and at least one extraction line for liquid and / or powder and / or suspension or paste are connected to the lower region. Preference is given to several supply lines for several products.
• the filter element which is preferably designed as a filter plate and intersects the longitudinal axis of the device, is arranged between the latter and the pump chamber; the filter element remote end of the inventive device is associated with the conveying gas line and the vacuum line.
• a T-shaped connecting pipe with two connecting sections each containing a shut-off valve for the delivery gas line and the vacuum line should protrude from a top wall of the device.
• the pump chamber should be connected to at least one inlet valve and to an outlet valve for the substance.
• the device is designed as an axial ridge chamber of the pump chamber of the device and provided axially movable therein, and is sealingly surrounded by at least one annular seal of the pump chamber.
• This ring seal is according to the invention arranged in the cylindrical pump chamber itself or it extends in an annular end collar whose diameter is shorter than the diameter of the pump chamber.
• a ring section widening in a funnel-like manner should be formed between the end collar and the pump chamber, of which preferably a frame for axially guiding the movable ridge chamber projects.
• the filter element which is preferably designed as a filter plate
• the filter element is assigned to a base section of the ridge chamber of the device which is axially movable in the pump chamber.
• the filter plate is defined according to the invention on the perforated base portion of the ridge chamber and projects beyond this side;
• the - advantageously arranged in a holder - filter plate should be surrounded at its edge by at least one sealing bead, on the other hand, the inner surface of the pump chamber rests.
• an inclined to its longitudinal axis outlet pipe is arranged, which preferably connects to an axial connecting pipe of the base region of the pump chamber.
• at least one vibrator should be mounted on the outlet pipe.
• This inclined outlet pipe opens into a - preferably axially parallel to the pump chamber - delivery pipe;
• a closure element is associated with the mouth region and at least one outlet valve is assigned to the free end of the conveying tube.
• the closure element actuates a closing plate which, in the closed position, covers the mouth of the outlet tube. This closing plate is designed so that its position can be selected; by partially closing or opening after this choice, an exact dosage of the product can be adjusted.
• a pump chamber with a flat filter is attached tangentially to a dosing unit with venting possibility and the lateral pump body connected to the vacuum and pressure source; it contains a tangential entry with shut-off unit.
• a vibration device is attached laterally at the rejuvenation of the pump chamber.
• a sliding disc is provided, which can be opened completely or only up to a selectable gap size to allow dosing.
• the metering body is connected via a valve to a pressure source, and at the lower end of the metering a shut-off unit is provided. On the other side there is a valve open to the atmosphere; So it is possible to vent.
• the pump body can now be filled according to the known principle / cycle with product and the sliding disc can be opened completely or only partially to dose or to drain product.
• the vibration unit can be activated. If the shut-off is opened, the product enters the underlying container, a reactor, dryer o.a. can be.
• the filter of the pump body can be cleaned by a pressure pulse, this possibility also exists with the dosing. If the contents of the pump body are emptied into the metering body, the displaced air volume escapes via the valve open to the atmosphere.
• the device is defined as a ridge frame in the head region of the pump chamber and at a distance from the filter element.
• This cage-like ridge frame consists of iw axis-parallel rods, which are optionally deformed at a distance from their free end in each case so that above a lower base portion extends an upper frame portion; its diameter is shorter than the diameter of the lower frame section.
• the filter element is to be stored as a filter plate in a frame and this fixed in the pump chamber between two container sections.
• the ridge frame is fixed firstward in a roof ring and provided at its lower end with an approximately parallel to the filter plate extending perforated plate or grid, a sieve or a filter. The latter is also at a distance from the filter board.
• the floating member is advantageously associated with a sealing ring in the ridge chamber or ridge frame; the open ring center can be closed by the axial approach of the floating organ or its ball end by its axial approach; Sealing ring and floating body form a valve of two bodies associated with each other, and the open center of the sealing ring can be covered by a ball end of the float, so the valve closed.
• the floating member has at least one ball end with the cross section of the ridge chamber corresponding diameter.
• the floating member on two ball ends which are connected by an axial rod as a tubular part - acting as a dumbbell.
• the lower ball end is with a diameter of 10 to 100 mm, preferably 20 to 80 mm equipped.
• the total length of the ridge chamber according to the invention is made up of about two thirds of its lower portion and about one third of the upper Section together; • the length of the pump chamber should preferably be between 10 and 1000 mm, preferably 50 and 800 mm and 60 mm and 100 lie at a diameter of 5 to 500 mm, preferably mm from 200th
• the chamber according to the invention can be made of different materials for conveying aggressive or sensitive products such as stainless steel, Hastelloy, plastic, glass, enamel, and this with coating.
• the system according to the invention consists of a calibrated cylindrical chamber with a lateral access provided with a butterfly valve; another closing valve is attached to the bottom outlet side of the appliance.
• a system for separating liquid and powder - a float with a filter - installed At the upper part of the apparatus is a system for separating liquid and powder - a float with a filter - installed.
• This system can be fixed or mobile.
• a lid closes the whole thing. It is connected to a pressure and a vacuum source, each equipped with shut-off valves. The lid encloses an O-ring on the upper part, which the floater attaches to in order to close the system when sucking in liquid.
• the system according to the invention works - controlled by a control box - automatically.
• the vacuum-side shut-off valve and the inlet valve are opened; with the help of the negative pressure, the liquid is sucked through the inlet pipe connected to the pump chamber.
• the liquid level rises until the float is raised and abuts the sealing ring in the filter chamber to connect to the vacuum source. break; by the negative pressure, the tightness of the mating on the sealing ring and float is guaranteed.
• the inlet valve and the vacuum valve are closed and the pressure valve and the exhaust valve opened. Then the pump chamber is emptied by the liquid is pressed out by pressure. After a few seconds, the pressure and discharge valves close again and the cycle can begin again.
• the vacuum-side shut-off valve and the inlet valve are opened and sucked by means of the negative pressure, the powder through the connected to the pump chamber line system or inlet pipe.
• the pump chamber fills with powder.
• the filter in its upper area prevents fine particles from entering the vacuum system.
• the float remains in its low position as the velocity of the delivery gas is insufficient to raise it.
• the pump chamber is emptied by the pressure which simultaneously cleans the filter in countercurrent, and after a few seconds the pressure and discharge valves are closed again. The cycle can start again.
• a suspension If a suspension is to be conveyed, the latter is sucked in under reduced pressure through the pipe system or inlet pipe connected to the pump chamber, and by means of the filter in the upper part of the pump chamber the particles of the suspension are separated from the liquid and fouling of the float is prevented.
• the liquid level rises until the float is lifted and closes the open annulus of the sealing ring to break the connection to the vacuum source.
• the inlet valve and the vacuum valve are closed and the pressure valve and the outlet valve open.
• the pump chamber is emptied by the powder is pressed out by pressure, which simultaneously cleans the filter in countercurrent. After a few seconds will be Pressure valve and outlet valve closed again; the cycle can start again.
• This system is also to be used according to the task for the volumetric metering of these different products; because the inventive system for separating liquid and powder can be moved in the interior of the pump chamber, so as to change the volume.
• the volume change allows the volumetric dosing.
• the device between the delivery of two different powders can be cleaned by the passage of liquid, but especially by suction of cleaning liquid.
• a process for the pneumatic conveying of flowable substances using the device according to the invention with which both particulate substances and liquid or suspension or pastes are simultaneously transferred from one container to another or a mixture of liquid and particulate matter is pumped or transported, which preferably consists of 0.01 to 99.99% liquid and 99% to 0.01% particulate matter or from 5.0% to 95.0% liquid and 95.0% to 5, 0% particulate matter.
• the cleaning can be done by operating the device in an empty state.
• Fig. 1 a mounted on a receptacle for flowable materials device for pneumatically conveying the substances in side view;
• FIG. 2 shows the enlarged conveyor device of FIG. 1 with details partially modified therefrom;
• Fig. 3 a detail of Fig. 2 at changed
• FIG. 5 is a side view of a differently designed Fordervoroplasty compared to Figures 1 to 4;
• FIG. 6 shows a sketch of a variant of the conveying device of FIG. 5 in a side view.
• a blocking element 16 is provided on a collar 14, above which the funnel-shaped base region 32 of a cylindrical pump chamber 34 of the conveying device 30 can be seen.
• an inlet valve 18 is an inlet pipe or a supply line 20 from. This is connected with its the delivery device 30 far end to branch lines 22, 22 f , 22 S , each having a storage container 24 for Powder or a storage container 26 are assigned for liquids or a storage container 28 for a suspension.
• branch lines 22, 22 f , 22 S each having a storage container 24 for Powder or a storage container 26 are assigned for liquids or a storage container 28 for a suspension.
• one of those flowable substances flows in the direction of flow x of the conveying device 30.
• the resting on a frame 23 powder container 24 is here equipped with a funnel-shaped outlet socket 25, the other two storage containers 26, 28 are designed like a barrel.
• a -ordinated filter or a filter plate 44 connects.
• the latter is surrounded by a sealing bead 46, which - like those ring seal 47 - conforms outwardly to the inner surface 33 of the pump chamber 34 even with a vertical movement of the ridge chamber 38.
• a sealing ring 48 which bears against its inside surface 33, can be seen, whose open ring center 49 is assigned a vertically or axially guided floating member 50.
• the cross-section of its - connected by a rod 51 - - ball ends 52 is greater than the inside diameter of the open ring center 49 that Abdichtringes 48 so that this - as shown in FIG. 2 - from a ball end 52 is able to be sealed.
• Fig. 3 the open state of Ab- sealing ring 48 sketched; which forms a kind of valve with the floating member 50.
• the left-hand line 55 of the connecting pipe 54 is associated with a compressed air or gas source 58 of more than 0.3 bar as conveying gas line and the right line 56 serving as a vacuum line is a vacuum pump 60 of a For example, negative pressure of ⁇ 500 mbar.
• the cylindrical pump chamber 34 of the conveyor 30 a of Fig. 2 goes up into a ring portion 37 of length ai with inwardly inclined wall surface, to which a cylindrical end collar 37 e of narrow diameter ei connected.
• the annular seal 47 sits for the ridge chamber 38 a within this end collar 37 e .
• the ridge chamber 38 a is here surrounded by a frame 62, the base feet 64 sit on the inclined outer surface of that ring portion 37. From the base feet 64, guide profiles 65 or axially parallel rods 66 project with radial struts 68, which guide the axially movable ridge chamber 38 a ; thanks to a - not shown - pneumatic drive, the latter can be adjusted in height in the frame 62.
• the filter plate 44 supports here in a mechanical see holder 42 which is encompassed by the above-described sealing bead 46.
• the base region 32 forms a tip 31, to which a removal line 21 with integrated outlet valve 19 adjoins.
• the system according to the invention for separating liquid and powder thus has a floating organ or a float 50 with associated filter 44 in the upper region of the conveying device 30, 30 a , which is closed by a cover 36 is. This is connected to at least one pressure source 58 and at least one vacuum source 60. Below the lid 36 and in the upper region of the ridge chamber 38, 38 a , a sealing ring 48 is provided, which the float 50 applies to close the system when sucking liquid in the flow direction x.
• the automatic system is controlled by a control box and works in the following way:
• the vacuum-side shut-off valve 57 a and the inlet valve 18 are opened; - By means of the vacuum, the liquid is sucked through the inlet pipe 20 connected to the pump chamber 34.
• the liquid level rises until the float 50 is raised and abuts the sealing ring 48 in the ridge chamber 38, 38 a to interrupt the connection to the vacuum source 60.
• the vacuum ensures the tightness of the mating sealing ring / float 48/50.
• the inlet valve 18 and the vacuum valve 57 a are closed and the pressure valve 57 and the outlet valve 19 are opened.
• the pump chamber 34 is emptied by the liquid is pressed out by pressure.
• the vacuum-side shut-off valve 57 a and the inlet valve 18 are opened; by means of the vacuum, the powder is sucked in through the pipe system 34 connected to the pumping chamber 34. -
• the pump chamber 34 fills with powder, and the filter 44 in the upper region prevents fine particles enter the vacuum system.
• the float 50 remains in its low position shown in FIG. 3, since the velocity of the conveying gas is not sufficient to raise the float 50.
• the inlet valve 18 and the shut-off or vacuum valve 57 a are closed and the pressure valve 58 and the outlet valve 19 are opened.
• the pump chamber 34 is emptied by the pressure, which simultaneously cleans the filter 44 in countercurrent.
• the shut-off or vacuum valve 57 a and the inlet valve 18 are open; - By means of the vacuum, the suspension is sucked through the connected to the pump chamber 34 line system or inlet pipe 20.
• the inlet valve 18 and the vacuum valve 57 a are closed and the pressure valve 58 and the outlet valve 19 are opened.
• the pump chamber 34 is emptied by the powder is pressed out by pressure, which simultaneously cleans the filter 44 in countercurrent.
• This system is also to be used for the volumetric dosing of these different products; because the system according to the invention for the separation of liquid and powder is displaced in the interior 35 of the pump chamber 34, the volume of which changes.
• the sealing bead 46 and the annular seal 47 of the separation system allow its displacement while sealing the pump chamber 34 out, the volume change allows the volumetric dosing.
• an axial exclusion tube 12 b of any length h adjoins the base area 32 b , which merges at the other end into an outlet tube 70 inclined at an angle w of, for example, 45 ° to the device longitudinal axis A. ; this is the outside of a vibrator 72 assigned.
• This outlet pipe 70 terminates at an axis-parallel conveying tube 74, the side wall of which engages through a pressure member 76 of a closure element 78 carrying a closing plate as a slider 75; That closing plate 75 serves to regulate a flow at the mouth of the outlet pipe 70 and thus the dosage of the product.
• the closure of the described system is effected by an outlet valve 19 b , which can be seen at the lower end of the conveying tube 74.
• the system according to the invention or its organs - can / may be movable or fixed.
• a filter plate 44 a is stored in a cylinder wall 82 outside a cylinder wall 82 the device 80 this surrounding - ring-like frame 84 which is held by two frame plates 86, 86 t .
• These collar laterally and can be so by laying on a - not shown - abutment, for example, by means of screw holes 87 enforcing screws - set.
• a cylindrical container portion 88 On the upper frame plate 86 rests a cylindrical container portion 88, which by a dome cover 90 with - a central opening 91 of the diameter di surrounding -
• First collar 92 is closed. The latter is sitting
• Diameter d 2 contains, in which a Abdichtring 48 can be seen and above this a Zuzhoustutzen 98 with that opening 96 electronicallytzendem interior for connection of the connecting pipe 54 with the conveying gas line 55 and vacuum line 56, ie for positive and negative pressure.
• each bar 102 of the ridge frame 100 preferably corresponds approximately to the diameter b of the bar 50 connecting the two ball ends 51 of the float 50 of about 10 mm.
• an inner diameter f of a base portion 105 of the length g of the ridge frame defining - free ends 104 of the bars 102 is added near the frame 84 and parallel to this EN punched sheet 110th
• the rod 102 is cut to a short length gx as a rod end.
• section 106 is inclined at an angle Wi of about 30 ° to the axis, so that the inner diameter fi of the upper frame portion 108 of the axial length g 2 following upwards is shorter than the above-mentioned diameter f.
• the length g2 here is also shorter than half the length g of the base portion 104.
• a likewise small length g 3 offer the end portions 107 of the bars 102 which are inclined in opposite directions to those bar sections 106 outwardly and the roof ring 94 inside.
• the pump chamber 34 b of FIG. 6 differs from the pump chamber 34 a of Figure 5 mainly by a flat ridge cover 89, the inside of the sealing ring 48 is assigned. This is between the inclined end portions 107 of the ridge frame 100th
• 6 is a floating organ or float 50 a of the exemplary length z of 150 mm with both ends of the rod 51 of length Zi of here 35 mm provided ball ends 52, 52 t of different diameters y, yi of 50 or 65 mm.
• the ball ends 52 and 52 t whose wall thickness measures, for example, 0.6 mm, lie loosely in the ridge frame 100, but may also abut the rods 102 in the base section 105 or in the upper frame section 108 on the inside in the region of their respective equator 53, so that the float 50 a is guided axially.
• the upper ball end 52 engages the sealing ring 48 and thus closes the open ring center 49.
• that perforated plate or perforated grid 110 limits the sinking path of the float 50, 50 a ,

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
• Air Transport Of Granular Materials (AREA)
• Jet Pumps And Other Pumps (AREA)
• Extraction Or Liquid Replacement (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Basic Packing Technique (AREA)
• Saccharide Compounds (AREA)

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• 2006
  • 2006-02-15 DE DE102006007277A patent/DE102006007277A1/de not_active Withdrawn
• 2007
  • 2007-01-30 CN CN200910001421.5A patent/CN101469724B/zh active Active
  • 2007-01-30 EP EP07703136A patent/EP1982074B1/fr active Active
  • 2007-01-30 CN CN200780011434.XA patent/CN101410629B/zh active Active
  • 2007-01-30 AT AT08018633T patent/ATE450713T1/de active
  • 2007-01-30 DE DE502007002195T patent/DE502007002195D1/de active Active
  • 2007-01-30 DE DE502007002258T patent/DE502007002258D1/de active Active
  • 2007-01-30 WO PCT/EP2007/000782 patent/WO2007088022A1/fr active Application Filing
  • 2007-01-30 AT AT07703136T patent/ATE451555T1/de active
  • 2007-01-30 US US12/278,271 patent/US8157484B2/en active Active
  • 2007-01-30 EP EP08018633A patent/EP2019209B1/fr active Active
• 2009
  • 2009-02-25 US US12/392,834 patent/US20090162150A1/en not_active Abandoned

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