DE2353288A1 - METHOD AND DEVICE FOR TRANSPORTING BULK GOODS - Google Patents

Description

Method and device for conveying bulk goods

The invention relates to a method for conveying bulk material, such as sand, from an upper container, which is under a certain pressure, such as atmospheric pressure, into a lower container, which is under a higher pressure, via a lock, the outlet the lock in the lower container is closed first ₉ the inlet of the lock of the upper container is then opened and the lock is filled with bulk material "the inlet is closed, the lock is pressurized and the outlet of the lock in the lower container is opened to to allow the bulk material to flow into the lower container, and then the conveying process is repeated until a desired amount of bulk material has been transported "

, OWGjNAL

409819/03 21

The invention also relates to an implementation device deB procedure.

The pumping of sand and other bulk material rubbing and strongly affects verschleißend on applied parts is done for various purposes usually in a batch operation, DAHD batches, there's üb difficult to operate a continuously operating lock that can withstand the wear caused by such bulk ,, If any locks are used, eo their structure and their operation rather expensive "Regardless of the type of hosting the bulk material beateht by performing a erhebliahes EntlUftußg © _problem-p which has in the known procedures to follow ₉ that air under high iiberdruek is discharged into the atmosphere and is therefore no longer usable for conveying purposes. At the same time, the discharge of compressed air has the disadvantage that it takes up a considerable volume under atmospheric pressure, so that problems arise in dust separation if the spread of dust ¥ are avoided sollo Die for dust separation Required additional devices increase the creation data for the device _{or the like}

In the case of batch operation, there is also the significant Disadvantage that only a small part of the entire work process can be used for the conveying itself,

409819/032 1

while the remaining part is used for other procedural stages is required, such as pressure equalization before the Actuation of the conveyor device.,

The object of the invention is therefore to create a method and a device that can convey Enable bulk goods from one container to another, which is kept under a substantially constant overpressure and from which the bulk material emerges continuously can, and at the same time the vent problems are switched off o.

In the method explained in more detail at the outset, this is achieved according to the invention in that the volume of the. lock is changed during conveying in such a way that it increases to a maximum after the outlet has been closed the volume of the Lock is then held at the maximum until the exit « let has been opened, then the volume to a The minimum is lowered and the <1minimum is maintained, until the outlet is closed again. ■

The bulk material can be granular, powdery, rod-shaped, be particulate Ocdgl »or as Jisohung such Solids are present with flasser or other liquids, however, the method and the device are described below only on the basis of the transport of sand.

An upper container that, under a certain pressure, like atmospheric pressure, stands, is at a lower level Connected container, which is under a higher pressure.

0-9 81 9 / 0-321

The higher pressure in the lower container should essentially be kept constant, for example a constant to ensure a pneumatic outlet in the form of a fairly constant sand flow from the lower container » A sluice is arranged between the two containers through which the sand is passed when the upper container has been filled with sand in a suitable manner »

-First, the outlet of the lock is opposite to the lower one Container closed It then becomes the inlet of the lock opened by the upper container so that sand can flow down into the sluice when the sluice is filled the inlet closed so that the lock opposite the Convection is closed «, you will then be advantageous put under overpressure and that already before the outlet is opened or just when the opening of the outlet is = ginntο The outlet is kept open until the sluice is emptied into the lower room. Then the outlet is closed and the described procedure nsab «= run repeatedly until the desired length is conveyed is. Before opening the inlet of the sluice it is common However, it is necessary that the pressure medium within the lock that has the same overpressure as the pressure medium in the lower room, in order to reduce the pressure to the level that prevailed in the upper room The pressure medium, which is compressed, for example: Air with an overpressure of IMPa and out of the lock should be discharged would be at atmospheric Pressure take on a considerable volume and thus make an extensive deduster necessary <>

409819/0321

The invention eliminates these disadvantages in that the volume of the sluice is changed by increasing the volume of the sluice to a maximum after the outlet is closed maximum is kept * is opened to the outlet, so that the sand can flow downwardly into the lower container _o the volume is then reduced to a minimum and kept at the JÜnimum- closed again until the outlet is "in this' way, achieves that an excess of pressure medium is pressed into the lower container and that the pressure in the lock is reduced to a respective level by increasing the volume in the lock before the outlet from the upper space is opened, wherein the lock can be re-filled with sand, without the risk that sand or dust to escape »H uhrend of Fordervorgan ^ it from the o In the upper container in the lower container, the overpressure within the lower container is kept essentially constant, so that the sand can be continuously conveyed out of it.

In the drawing, an embodiment of the invention - shown, which is illustrated by the following description. "

The upper container A consists of a funnel 1 open at the top for sand «. At the bottom of the container 1 is an opening 3 is provided which leads to "an essentially cylindrical housing 2, which forms the lock G.

409819/0321

The opening 3 is designed as an inlet to the lock C and has a valve 4 for closing the opening 3 o

At the bottom of the lock C is an outlet 5, which can be closed by a valve β and leads into a lower container B, which consists of a closed housing 7, which has an outlet pipe 8 at a bottom, to pneumatically discharge sand "

The valve 4 is shown closed and is opened by sliding it downwards "It is operated by a working" cylinder 9 which is arranged within a protective housing which is provided inside the container 1 "

The valve 6 is shown in the g @ öffsa @ t®a position and can be controlled in eatsprecheßiäer rfeise by a working cylinder, all within one. Sehutagehäuses 12 is arranged in the housing 7 o

The two working cylinders 9 and 11 are corresponding Lines controlled from the outside through pipelines and 14 ssu the protective housing ?! 10 and 12 are led = The Pipeline 14 serves at the same time to bring pressure medium into the To direct housing 7 of the lower container B, wherein the pressure medium passed through the protective housing 12 and through an annular gap 15 is blown out «below the Valve body of the valve 6 is provided and at the same time protects the working cylinder 11 against contamination "

409 819/0321

The lock C has a hose-shaped, elastic membrane 16 within the cylindrical housing, which is fixed at both end faces on the circumference of the housing, for example by snap rings 17, opposite a shoulder of smaller diameter provided on the otherwise cylindrical casing of the housing 2 ₀

The LJembranJ6 is from the one shown in the drawing Position j in which it lies snugly against the liantel of the cylindrical housing 2, in a compressed position. the inside of the housing 2 only one. Space of very little Leaves volume through the end walls of the housing 2 and the membrane 16 is limited and so the highly variable Volume of lock C ensures <>

The drawing shows the lock C in a position in which the maximum volume has been reached. On the inside of the Membrane 16 has the same pressure as in the lower one Container B, because valve 6 in opening 5 is open » Even before diesel valve 6 is opened, the lock can C can be placed under such an overpressure by j Pressure medium is supplied through a line 18 which is in the upper end of the lock C is inserted «

In the drawing, the device is in an operating position drawn, in which the decrease in volume within the lock 10 should take place before., d- * s valve 6 closed will ο for this purpose a section 19 of the liantels of the cylindrical housing 2 provided with passages that the Space between the niembran 16 and the casing of the housing 2 connect to a chamber 20 between the section

409819/03 21

and an outer wall 21 is provided. The chamber 20 has a line 22 connected to a pressure medium source, not shown, which supplies the pressure medium, usually a liquid, to the chamber 20 in order to compress the membrane 16 and at least as much gas or air from the lock C through the opening 5 to drive out so that the valve 4 can be opened without treading. Then the valve 6 is closed and an increase in the volume inside the lock C is initiated in that the pressure medium is withdrawn from the chamber 20 through the line 22 by means of a device not shown .

In order to reduce the volume within the lock C to a minimum during the compression of the membrane 16 ensure free passage from the interior of the lock G to the discharge 5, due to the type of attachment of the membrane 16 on the lower end face of the housing 2 is not closable, the valve body of the upper valve 4 is provided with a central opening Tube 23 is provided which extends inside the lock C downwards. This pipe 23 also contributes to that the sand remains fluid during the discharge process.

Instead of the tube 23, the membrane on the naoh inside Welsenden surface also with elongated ones, not shown Be provided ribs that come into contact with each other when the membrane is compressed and thereby between the Ribs create grooves that have a free passage to the outlet opening 5 ensure ο

The tubular membrane 16 can by the compression in cross-section a completely flat shape - in plan - occupy, which is why it is expedient to have a completely free deformation

409819/0321

- 9 »- ■■. '■■ -" "■.:.

to allow the diameter of the tube 16, especially since the The diameter of the fastening on the end faces is significant is less than the cylinder diameter of the housing 2 « The hose 16 can so in the compressed state without further take such a shape.

The volume of the lock 0 can also be changed in other ways. For example, the lock G zv. ^r ei opposing walls in the form of pistons have "wherein the change in volume is extendable relative to one another by moving the piston, said inlet and outlet are disposed between the piston.

Expectations -

409819/0321

Claims (3)

ίο- 235328a Expectations driving for conveying bulk material, such as sand, from in an upper container »which is under a certain pressure like atmospheric pressure, is in a lower container, which is under a higher pressure, via a sluice, the outlet of the lock in the lower container being closed first, the inlet of the lock being closed by the The upper container is then opened and the sluice is filled with bulk material, the inlet closed, the sluice below overpressure set and the outlet of the lock in the lower Container is opened to let the bulk material flow into the lower container, and then the conveying process is repeated until a desired Schutt ™ good quantity has been transported, characterized in that that the volume of the lock (C) is changed during conveying in such a way that after the outlet (5) has been closed is enlarged to a maximum, the enlargement beginning at least shortly before the opening of the inlet (3) is, the volume of the lock (C) is then kept at the maximum until the outlet (5) has been opened, then the volume is reduced to a minimum and the minimum is maintained until the outlet (5) is closed again o 2. Device for performing the method according to claim 1, consisting of an upper container which exists under a certain pressure such as atmospheric pressure »and a lower container, which is under a higher pressure, with a lock with a between the two containers closable inlet is provided from the upper container and a closable outlet to the lower container, 409819/0321 characterized in that the lock (O) facilities (16, 19-22) has a change in volume allow the sluice (C) without the outlet (5) Dlocked 3. Apparatus according to claim 2, characterized in that the executions for changing the volume of the lock (C) consist of at least one elastic element (16) which rests on the landing of the housing (2) of the lock (C) and a snug Forms inner chamber of variable volume in that the elastic element (16) is elastically deformable into the interior of the lock (C) by the application of pressure medium _{and is 1} and line elements (19-22). for supplying pressure medium which is passed between the outer side of the elastic element (16) and the wall of the housing (2) and removed from the thus formed space. 4ο device according to claim 2 and 3. » characterized, that the elastic element consists of a hollow-shaped Membrane (16) consists. 5ο device according to claim 4, characterized in that that the inlet (3) in the lock (C) has a valve (4), the ^ carries a tube (23) provided with openings, which protrudes downward into the lock (C) and at a small distance above the outlet opening (5) of the lock (C) ends, and that the tube (23) has an inner Limitation of the deformation of the tubular membrane (16) forms inwards. 098 19/0321 6o device according to claim 4 »characterized in that the tubular membrane (16) on the inwardly facing surface has spacing _{elements, such as ribs p} extending in the longitudinal direction, which, when the xÄetabran (16) are compressed, create a free passage between the inlet ( 3) and the outlet (5) 7ο Device according to claim 2, characterized in that the soleplate (C) has two opposite end faces, which are designed as pistons and change the volume of the sluice (C) by moving the pistons in relation to each other » 4098 19/0321