EP4001508A1 - Dispositif et procédé de nettoyage du sable - Google Patents

Dispositif et procédé de nettoyage du sable Download PDF

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Publication number
EP4001508A1
EP4001508A1 EP21185854.3A EP21185854A EP4001508A1 EP 4001508 A1 EP4001508 A1 EP 4001508A1 EP 21185854 A EP21185854 A EP 21185854A EP 4001508 A1 EP4001508 A1 EP 4001508A1
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EP
European Patent Office
Prior art keywords
sand
chassis
cleaning device
elevator
arm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21185854.3A
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German (de)
English (en)
Inventor
Christoph Mayer-Klenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandmaster Gesellschaft Fuer Spielsandpflege und Umwelthygiene Mbh
Original Assignee
Sandmaster Gesellschaft Fuer Spielsandpflege und Umwelthygiene Mbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Sandmaster Gesellschaft Fuer Spielsandpflege und Umwelthygiene Mbh filed Critical Sandmaster Gesellschaft Fuer Spielsandpflege und Umwelthygiene Mbh
Publication of EP4001508A1 publication Critical patent/EP4001508A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H12/00—Cleaning beaches or sandboxes
    • E01H12/008—Cleaning beaches or sandboxes cleaning sandboxes

Definitions

  • the present invention relates to an apparatus and a method for cleaning sand.
  • Sand here means granular, mineral materials made in particular from quartz, lime, dolomite or granite, with a typical grain size of about 1 to 6 mm.
  • Ceramic specifically includes the loosening, aeration and removal of contaminants by raising the sand above its surface and passing it through a screen which separates out the contaminants.
  • Typical uses of the invention relate to the cleaning of sand on sandpits and fall protection areas below play and climbing equipment, as well as the sand on diving pits and shot put facilities in schools and sports facilities, and sand on beaches and leisure facilities.
  • Sand cleaning on playgrounds and sports and leisure facilities is carried out to a large extent by specialized commercial companies commissioned by municipalities such as cities and municipalities.
  • Animal excrement, broken glass, bottle caps, cigarette butts and the like are typically found in the surface layers of soiled sand. Up to a distance of about 15 to 20 cm from the sand surface, aerobic microflora predominate. Depending on the type, quality and compaction of the sand, this is followed by anaerobic microflora at a depth of about 25 to 40 cm, whose bacteria and microorganisms cause the typical moldy smell that can occur on sandy surfaces that have not been cared for for a long time.
  • the sand must also be regularly loosened to a depth of at least 40 cm on the fall protection areas below play and climbing equipment in order to ensure effective fall protection.
  • Proper and high-quality sand cleaning requires not only the detection of the cleaned area, but also the detection and recording of the working depth.
  • the sand elevator was built according to the state of the art (EP 1 108 816 A2 ) provided with a plurality of sand conveying elements (slats, shovels, buckets) attached to a motor-driven, endless conveyor (chains or belts arranged parallel and spaced apart from one another, or a single, wide, circulating belt of rubber material) which are arranged between a, in the digging position that can be immersed in the sand to be cleaned and a discharge position, preferably conveying overhead, from which the sand raised with the aid of the sand conveying elements is thrown onto a sieve that lets the sand pass and separates impurities that get into the receiving container.
  • sand conveying elements slats, shovels, buckets
  • a motor-driven, endless conveyor chains or belts arranged parallel and spaced apart from one another, or a single, wide, circulating belt of rubber material
  • the screen can be an inclined vibrating screen, and the sand that has passed the screen automatically falls back onto the sand surface behind the pick-up point.
  • the frame (chassis) running on wheels, caterpillars and/or chains is typically equipped with at least one motor-driven shaft in order to create a mobile, self-propelled sand cleaning device.
  • the engine located on the chassis typically an internal combustion engine, is expediently coupled to a hydraulic pump, which supplies the various consumers (travel drive, conveying device of the sand elevator) with hydraulic fluid via hydraulic lines.
  • at least the sand elevator is typically provided with a covering and housing.
  • Gram Culture means - depending on the adjustment/lowering of the sand elevator - that section of the conveying device with conveying elements that is in the to be cleaned sand is immersed so that the moving conveying elements dig into the sand and absorb sand.
  • “Dig position” refers to such a position of the conveying device in which the digging piece dips into the sand to be cleaned.
  • “Dig depth” means, within the sand to be cleaned, the distance between the middle sand surface and the lower edge of the lowermost conveying element when the digging piece assumes its digging position.
  • the massive, heavy frame of the sand cleaning device can serve as a reference point for the sand surface when it is standing or driving on the sand surface.
  • the sand elevator uses a digging piece that can be adjusted between a selectable working position (digging position) dipping into the sand to different depths and a resting position above the sand surface.
  • the digging piece assumes this resting position, for example, when the mobile sand cleaning device drives automatically from its transport vehicle to the place of use, or when the sand cleaning device is reset in the course of the sand cleaning. Starting from this resting position, the digging piece must be lowered until it dips deep enough into the sand to be cleaned so that the sand elevator can pick up and circulate sand.
  • Such lowering of the grave piece is achieved by adjusting the sand elevator with respect to a frame (chassis) of the sand cleaning device which holds the sand elevator.
  • the entire sand elevator can be articulated pivotably on the chassis.
  • the pivoting is effected by a hydraulically operated piston/cylinder arrangement, the piston rod of which adjusts the sand elevator in such a way that its digging piece dips more or less deeply into the sand.
  • the entire sand elevator can be along two, parallel and spaced from each other as well as almost vertically aligned rails that are permanently attached to the chassis (downwards) onto the sand surface or away from the sand surface (upwards).
  • the downward adjustment (lowering) typically occurs solely under the action of gravity.
  • At least one hydraulically operated piston/cylinder arrangement which is inserted between a carrier on the chassis and an abutment on the sand elevator, ensures the upward adjustment (raising).
  • Known mobile sand cleaning devices of this kind are in use and for example in the documents DE-C2-32 09 134 , DE-C2-34 37 926 , DE-A1-35 13 454 , DE-A1-40 07 409 or in the German patent application 198 53 351.9 described.
  • the digging depth is determined solely and exclusively by the appropriate setting and locking of levers, rods or lifting cylinders, which fix the sand elevator in a specific position with respect to the chassis, so that the digging piece can be moved up to a specific dig depth in accordance with this sand elevator position immersed in the sand to be cleaned.
  • the document EP 0 319 420 B1 discloses a self-propelled machine for cleaning beaches.
  • the known self-propelled device has a tipping container into which the collected waste is conveyed. Also forward of the machine is a pivoted conveyor terminating at its inlet in a scraper plate which slides across the beach to be cleaned to collect debris which is then conveyed into the tipping bin by the two-stage conveyor.
  • the document DE 36 27 015 A1 discloses an earth clearing device, for example in the form of a bucket wheel excavator, with a chassis on which there is an elevator whose inclination relative to the chassis can be changed.
  • An adjusting cylinder is used to change the elevator inclination a sensor is assigned, which detects the respective elevator inclination and converts it into electrical signals which are fed to a signal processing device.
  • the technical field of the present invention lies in specifying or providing a device for, in particular, commercial sand cleaning.
  • This prior art also describes a mobile sand cleaning device with a frame that can be moved on the original surface of the sand layer to be cleaned and on which a sand elevator is mounted adjustable, in particular lowerable and raisable, which is equipped with an endless belt, motor-driven, circulating conveying device which is provided with a large number of conveying elements which circulate between a digging position immersed in the sand to be cleaned and a discharge position from which the sand transported in the conveying elements is thrown onto a sieve located on the sand cleaning device, which allows the sand to pass and separates impurities that end up in a collecting tank, the respective digging depth depending on the extent of the respective adjustment/lowering of the sand elevator with respect to the frame, wherein the sand cleaning device is equipped with a device for recording electrical signals, for processing these signals into data and for storing, making available and/or making these data available; and there is also a sensor which detects the respective adjustment/lowering of the sand elevator with respect to the frame and generate
  • this object is achieved with a device according to claim 1 or 11, which for the first time allows cleaning very small, very narrow or very narrow sandy areas, which can also be surrounded by a raised border, as well as working under trees and under playground equipment .
  • a sand cleaning device which comprises a chassis and a sand elevator which is held on the chassis in an adjustable manner, in particular such that it can be lowered and raised, and is equipped with a motor-driven, revolving conveying device which is provided with a large number of conveying elements which circulate between a digging position immersed in the sand to be cleaned and a dumping position from which the sand transported in the conveying elements is thrown onto a sieve which allows the sand to pass and which separates impurities which reach a collection container, the conveying device is cylindrical, its axis of rotation runs parallel to the surface of the sand to be cleaned, its end faces and lateral surface are closed, and the conveying elements are attached to the lateral surface of the conveying device. This builds the conveyor much flatter and can also be used under obstacles such as trees or playground equipment.
  • conveying elements are removably attached to the lateral surface of the conveying device.
  • conveying elements damaged by heavy foreign objects in the sand can be replaced quickly and easily without having to replace the entire conveying device.
  • the sand elevator is connected to the chassis by means of an arm, the arm comprising two members which are pivotally connected to one another about an axis parallel to the sand surface, the member facing the chassis being pivotable about an axis parallel to the sand surface is pivoted to the chassis.
  • the arm comprising two members which are pivotally connected to one another about an axis parallel to the sand surface, the member facing the chassis being pivotable about an axis parallel to the sand surface is pivoted to the chassis.
  • the sand elevator is pivoted about an axis parallel to the surface of the sand at the free end of the limb of the arm facing away from the chassis. In this way, the change in the working position of the sand elevator when the arm is extended and retracted can be easily compensated. This improves the efficiency of the sand elevator in the far extended or far retracted position.
  • the sand elevator can be moved back and forth on a rail which runs radially away from the chassis about an axis parallel to the surface of the sand and is pivotably articulated at the free end of the member of the arm facing away from the chassis. In this way, the reciprocation of the sand elevator for sand cleaning can be performed without complicated movements of the arm, whereby the Operation of the sand cleaning device according to the invention is greatly facilitated.
  • Hydraulic cylinders are preferably used to pivot the links.
  • the sand elevator can also be moved back and forth on the rail by means of a hydraulic cylinder or an electric motor.
  • the conveyor elements are preferably designed as angular strips with two legs, one leg of which is screwed to the lateral surface of the conveyor device and the other leg of which is beveled in the direction of rotation of the conveyor device.
  • the conveying elements are preferably closed on the side by a metal sheet. This prevents sand losses to the side during the conveying process.
  • the rail on which the sand elevator is reciprocally movable can preferably be provided with a coupling for coupling an arm of a commercially available excavator.
  • the sand cleaning device according to the invention then does not require its own chassis with hydraulic arm, but can be coupled to any commercially available excavator (as well as excavator shovels of different sizes and other tools). Recently, a hydraulic coupling has also been made available, so that the hydraulic pressure required to drive the conveying device can be made available by the commercially available excavator.
  • the above object is also provided with a mobile sand cleaning device with a chassis on which a sand elevator is adjustable, in particular lowerable and raisable, which is equipped with an endless, motor-driven, circulating conveying device, which is provided with a large number of conveying elements, which circulate between a digging position immersed in the sand to be cleaned and a discharge position, from which the The sand transported by the conveying elements is thrown onto a sieve located on the sand cleaning device, which allows the sand to pass and separates impurities which end up in a collection container, the sand elevator being connected to the chassis by means of a telescopically retractable and extendable arm.
  • the arm is horizontally rotatably attached to the chassis. This eliminates the need to rotate the carriage itself by means of the crawler tracks or wheels on the carriage, which may cause damage to the sand cleaning apparatus stand.
  • the arm is vertically pivotably attached to the chassis. This also makes it possible to work over an enclosure in the path.
  • chassis runs on crawler tracks. This significantly improves the off-road mobility of the mobile sand cleaning device.
  • the sand elevator is attached to the distal end of the arm such that it can rotate about an axis perpendicular to the direction of extension of the arm. In this way, the working direction of the sand elevator can be flexibly adapted to the shape of the sand area to be cleaned.
  • the sand elevator is arranged at the distal end of the arm so that it can be lowered perpendicular to the direction in which the arm extends. In this way it is possible to reach and clean a sandy area below, even over relatively high enclosures.
  • This advantage can also be achieved in that the arm is mounted so that it can pivot vertically about a bearing block, and the bearing block can be raised vertically upwards and lowered downwards relative to the chassis.
  • the revolving conveying device is formed by a wheel rotating about a horizontal axis, on the radial outside of which the conveying elements are arranged.
  • the construction of the conveying device is as light and small as possible, which facilitates the handling of the sand elevator by the telescopic arm. It is then not so strong telescopic arm required.
  • the circulating conveying device is designed as a hollow cylinder with a horizontal axis of rotation, on whose lateral surface the conveying elements are arranged.
  • the object of the invention is also achieved by a method for cleaning sand, in particular for cleaning sand in sandpits, playgrounds and sports facilities, in which a mobile sand cleaning device having a chassis on which a sand elevator is adjustable, in particular lowerable and raisable, is held which is equipped with an endless circulating conveyor which is provided with a plurality of conveying elements which circulate between a digging position immersed in the sand to be cleaned and a dumping position from which the sand transported in the conveying elements is thrown onto a sieve located on the sand cleaning device , which allows the sand to pass and which separates impurities that are collected in a Arrive collection container, wherein the sand elevator is lowered into the sand to be cleaned and moved in the sand to be cleaned by means of a telescopically retractable and extendable, rotatably and pivotably mounted arm on the chassis.
  • a sand cleaning device 1 comprises a chassis 10 which is provided with crawler tracks 12 .
  • the chassis 10 can of course also be provided with pneumatic tires.
  • a frame 14 is rotatably mounted about a vertical axis.
  • This frame 14 carries a driver's cab 16 and on this frame 14 is a swivel arm 18 about an axis parallel to the sand surface to be processed, ie horizontally, pivotably mounted.
  • the pivot arm 18 includes a proximal and a distal member 20, 22, the are also hinged to one another so as to be pivotable about a horizontal axis, that is to say running parallel to the surface to be machined.
  • the proximal member 20 is pivoted by a hydraulic cylinder 24 . This is mounted on the frame 14.
  • the distal member 22 is pivoted by a hydraulic cylinder 26 articulated to the proximal member 20 .
  • an adapter 28 which can be pivoted about a horizontal axis and which is also articulated on the distal end so that it can be pivoted about a horizontal axis.
  • This adapter 28 is pivoted by a further hydraulic cylinder 30.
  • the device described corresponds to a commercially available small excavator, which is usually also equipped with adapters 28 for receiving various tools such as excavator shovels, grippers, etc.
  • These small excavators are preferably also provided with a tap connection for the hydraulic fluid, so that the devices attached to the adapter, such as grabs or the sand elevator 36 according to the invention, are powered by the power source of the excavator, which is usually a hydraulic pump arranged on the frame 14 or under the driver's cab 16 , can be driven.
  • the power source of the excavator which is usually a hydraulic pump arranged on the frame 14 or under the driver's cab 16 , can be driven.
  • the sand elevator 36 of the present invention preferably includes a suitable receptacle 32 for the adapter 28 so that the sand elevator 36 of the present invention can be connected to a commercially available excavator in lieu of any other tool.
  • the receiving element 32 for the adapter 28 is preferably not connected directly to the sand elevator 36, but is arranged on a rail 34 running horizontally.
  • the receiving element 32 for the adapter 28 and the sand elevator 36 can each be moved back and forth along the rail 34, so that it is possible to work on a sandbox by simply moving the rail 34 opposite the receiving element 32 for the adapter 28 and the sand elevator 36 opposite the rail 34 and is moved. In this way, a uniform digging depth is ensured without the need for complicated control of the swivel arm 18 in order to move the sand elevator 36 away from and back onto the chassis 10 with a constant digging depth.
  • the sand cleaning device according to the invention can for the first time also be used in sand areas, for example sand boxes, which are surrounded by an enclosure.
  • the sand elevator 36 comprises a conveying device 37 enclosed by a housing 38 .
  • this housing 38 has two end-face end plates 40 on both sides of the conveying device 37, which have the shape of a sector of a circle in the distal area and are rectangularly terminated proximally.
  • a lateral surface 42 of the housing 38 is formed by a correspondingly bent metal sheet, which then ends straight to the rear. Further details of the sand elevator 36 are described below.
  • the 1 shows the sand elevator 36 in a middle working position.
  • the 2 shows the same arrangement as 1 , but with the sand elevator 36 fully retracted towards the chassis 10.
  • FIG 3 shows a further embodiment of the sand cleaning device 1 according to the invention, in which the sand elevator 36 is provided with its own chassis 44, which consists of two pneumatic tires 46 arranged distally in front of the sand elevator 36. These pneumatic tires 46 are preferably also arranged next to the sand elevator 36 in the width direction, so that the track width of the two pneumatic tires 46 is wider than the width of the sand elevator 36.
  • This chassis 44 is used on the one hand to prevent the tilting moment, which acts on the chassis 10, from becoming too large when the sand elevator 36 is in the distally fully extended position, by the two pneumatic tires 46 then having the corresponding moment compared to the support the ground.
  • the two pneumatic tires 46 are adjustable in height, and by adjusting the height of the chassis 44, the digging depth of the sand elevator 36 can be precisely set and maintained.
  • FIG 3 shows a middle position of the adapter 28 and a maximally proximal retracted position of the sand elevator 36.
  • the sieve 48 and collecting container 50 are firmly connected to the housing 38 of the sand elevator 36, so that optimal sand cleaning is guaranteed despite different working positions.
  • figure 5 shows the swivel arm 18 in the maximum extended position, with the adapter 28 in turn being in the middle position and the sand elevator 36 also being extended to the maximum.
  • FIG. 6 also shows the swivel arm 18 and the sand elevator 36 which are extended to the maximum, whereby this time the adapter 28 is also extended to the maximum, ie it is in a rear position in the vicinity of the chassis 10 (proximal).
  • FIG. 7 shows only the device consisting of adapter 32, rail 34 and sand elevator 36, which is to be fastened to the swivel arm 18 with the adapter 32, obliquely from above in a three-dimensional representation in order to show the technical details of the device more clearly.
  • the adapter 32 can be moved along the rail 34 by means of a hydraulic cylinder 52 .
  • Another hydraulic cylinder 54 engages the outer surface 42 of the sand elevator housing 38 and enables the sand elevator housing 38 to be moved back and forth with respect to the rail 34 .
  • a carriage 56 with rollers 58 is movably mounted in the rail 34 .
  • the sand elevator 36 comprises a sheet metal construction in the form of a cylindrical drum as the conveying device 37, the axis of rotation of which runs parallel to the surface of the sand to be processed. Evenly spaced conveying elements 76 are screwed to the outer surface of the drum, projecting radially outwards.
  • These conveying elements 76 comprise an L-profile with two legs at an angle of about 90° to one another, the shorter legs of which are parallel to the Lateral surface 42 of the conveying device 37 is arranged, while the other longer leg projects radially from the lateral surface 42 and is bent in its outer area counter to the intended direction of rotation of the conveying device 37 .
  • the conveying elements 76 are closed off by a pentagonal plate 78 so that sand caught by the conveying elements 76 can no longer flow off to the side.
  • the housing 38 supports the running gear 44, which includes a shaft 80 which supports the two tires 46 in a rotatable manner, the distance between the tires 46 being greater than the width of the housing 38 and the shaft 80 being horizontal to the surface of the sand to be processed runs.
  • the shaft 80 is designed to be adjustable in height, in that a piece of pipe 82 is attached in the middle of the shaft 80, which is accommodated in a further piece of pipe 84 with a larger inside diameter than the outside diameter of the piece of pipe 82, with the piece of pipe 84 on the Front of the housing 38 is fixed and mounted vertically.
  • the height of the chassis 44 and thus the digging depth of the sand elevator 36 can thus be adjusted by adjusting the height of the chassis 44 by adjusting the pipe section 82 in the pipe section 84 .
  • the pipe section 82 can then be mechanically fixed in the pipe section 84, for example by means of a locking screw 86.
  • the pipe sections 82, 84 are polygonal, preferably rectangular or square in cross section.
  • FIG. 8 shows the sand elevator 36 according to the invention from the outside, ie viewed in the direction of the chassis 10 .
  • the design and the screwing of the conveying elements 76 become even clearer in that the screw heads 88 are visible.
  • stabilizing plates 90 arranged further inwards parallel to the plates 78 can be seen same shape as the plates 78, which serve the outer end of the conveyor elements 76 correspond.
  • the hydraulic motor 92 arranged on the outside of the lateral surface 42 can also be seen, which drives the conveying device 37 via a belt pulley 94 and drive belt 96 .
  • FIG 9 shows the sand cleaning device of FIG 7 of the page.
  • the hydraulic motor 92, the belt pulley 94 and the drive belt 96 for driving the conveying device 37 can be clearly seen.
  • the pulley 98 can be seen here, which sits on a common shaft with the conveyor 37 and is driven by the drive belt 96 .
  • the figures 7 , 8th and 9 show both the receiving element 32 and the sand elevator 36 in a middle position on the rail 34.
  • FIG. 1 shows the sand elevator 36 fully extended in the distal direction, while the receiving element 32 is still positioned in the middle position.
  • 11 12 shows the sand elevator 36 in the fully proximally retracted position on the rail 34, i.e. in the position closest to the carriage 10.
  • the conveyor 37 rotates clockwise, ie so that the conveyor elements 76 are moved down to the front.
  • the conveying elements 76 are filled with the sand in which the conveyor 37 is immersed. This is conveyed upwards on the distal side of the housing 38 and cannot escape laterally from the conveying elements 76 through the metal sheets 78 .
  • the sand is then ejected backwards through the opening of the housing 38 between the end plates 40 by centrifugal force and gravity and hits the catch sieve 48.
  • This can have a suitable mesh diameter so that only sand components of a suitable fineness can pass through pass through the catch screen 48 and be deposited back on the ground.
  • Catching sieve 48 and collection container 50 preferably consist of metal grids with a corresponding mesh size. Catching sieve 48 and collecting container 50 can be provided with a vibrating device so that the sand falls through better.
  • impeller elements 76 be damaged by particularly large or heavy foreign objects in the sand, the operator can easily replace them by unscrewing the three screws 88, removing the damaged impeller element 76 and screwing on a new impeller element 76 without having to leave the machine for a long time fails.
  • FIG. 12 shows a further sand cleaning device 110 according to the invention in a 3-dimensional representation from diagonally behind in the transport position, i.e. with the telescopic arm 130 fully retracted.
  • the further sand cleaning device 110 comprises a chassis 120, which is preferably provided with crawler tracks 122 for independent locomotion of the machine.
  • wheels preferably with pneumatic tires, can also be provided on the chassis 120 instead.
  • a telescopic arm 130 is mounted on the chassis 120 so that it can rotate horizontally relative to the chassis 120 .
  • the telescopic arm 130 can be moved in and out by means of a multi-stage hydraulic cylinder 132 .
  • the telescopic arm 130 is mounted on a platform 150 so that it can pivot about a horizontal axis.
  • at least one hydraulic cylinder 136 is provided, which acts between the telescopic arm 130 and the platform 150 .
  • a hydraulic cylinder 136 is preferably provided on both sides of the telescopic arm 130 in order to better distribute the forces that arise.
  • the platform 150 can be moved up and down in the vertical direction on four vertical rails 152 .
  • the rails 152 are preferably arranged on both sides of the platform 150 and in each case at the front and rear, so that there is a corresponding rail at each corner of the platform 150 .
  • a vertically acting hydraulic cylinder 154 Preferably on the side of the platform 150 opposite the telescopic arm, there is a vertically acting hydraulic cylinder 154, optionally multi-stage, which is used to raise and lower the platform 150.
  • the hydraulic cylinder 154 is thus arranged between the platform 150 and one horizontally rotatable part 124 of the chassis 120 .
  • the sand elevator 140 is attached to the distal end of the telescopic arm 130 so that it can rotate about a vertical axis.
  • the sand elevator 140 can also be lowered and raised from the distal end of the telescopic arm 130 by means of hydraulic cylinders or by means of a toothed rack.
  • a corresponding lowering option for the Sandelevator 140 allows even better work beyond the enclosures of sand courts.
  • the sand elevator 140 itself comprises a conveying device 170, which is designed in the form of a mill wheel or a hollow cylinder, on the outer surface of which conveying elements 176 are arranged.
  • the conveyor device 170 rotates about the axis of rotation of the hollow cylinder, which runs essentially horizontally.
  • the conveyor elements 176 are designed as essentially rectangular plates that are slightly concave in the direction of rotation of the conveyor device 170 and have a front edge that projects in the direction of rotation and runs parallel to the axis of rotation of the hollow cylinder.
  • the edges of the hollow cylinder are formed by circumferential rings that connect the individual conveying elements 176.
  • a protective plate 172 is mounted forward in the direction of rotation of the conveyor device 170 and is in the form of a quarter sector of a hollow cylinder coaxial with the hollow cylinder of the conveyor device 170 with a slightly larger diameter and slightly longer length than the hollow cylinder of the conveyor device 170 .
  • This protective plate prevents the sand picked up by the conveying elements 176 from being thrown forward by the centrifugal force. Rather, the guard plate 172 forces the sand to remain on the conveyor elements 176 until it has passed the highest point of the conveyor 170.
  • the protective plate 172 in the form of a hollow cylinder sector merges into a cuboid box 174 with the same cross section.
  • the sand leaves the blades of the conveying elements 176 and flies out of the box 174 to the rear. After leaving the box 174, the sand hits a sieve 180 arranged behind it, which pushes the box 174 in the direction of flight of the sand essentially closed.
  • the sieve 180 also has a rectangular shape, like the cross-section of the box 174, but has slightly larger dimensions in order to still be able to sieve sand that has been deflected to the side.
  • the sand passes through the sieve 180 and the impurities are held back by the sieve 180 and fall down along the almost vertical sieve 180 into a cuboid collecting container 183 which is arranged horizontally parallel to the axis of rotation of the conveying device and is approximately as wide as the sieve 180, but has a significantly shorter length.
  • the impurities that have been screened out collect in the collecting container 183, the collecting container 183 can be removed in order to empty it if necessary.
  • at least the side surfaces of the collecting container 183 like the sieve 180, are designed as a fine metal mesh which does not significantly impede the passage of the sand, but retains all larger contaminants.
  • the screen 180 may be slanted slightly so that its top edge is slightly further away (backward) from the conveyor. This further facilitates the passage of the sand.
  • the front and rear directions are considered to be in the working direction with respect to the sand elevator 140, i.e. the screen 180 on which the screened sand is ejected is defined as rear.
  • the conveying elements 176 then move downwards, i.e. on the side facing the sand or immersed in the sand, forwards at the front within the protective plate 172 and downwards at the rear, while the sand picked up is thrown through the sieve 180 by centrifugal force.
  • the conveying device 170 is driven by an electric or hydraulic motor 190 which is located directly above the axis of rotation of the conveying device and directly outside the protective plate 172 .
  • the axis of rotation of the motor is parallel to the axis of rotation of the conveying device if a V-belt drive preferably takes place via a pulley 192 attached to the motor shaft, a V-belt 193 and another pulley 194 attached to the conveying device.
  • a chain drive, a drive via a shaft with two bevel gears and similar drive solutions are of course also possible.
  • the advantage of the motor arrangement described here is that the motor is optimally protected against damage.
  • the sand cleaning device 110 moves on its crawler tracks 122 close to the wall, the telescopic arm is pivoted upwards via the hydraulic cylinder 136 and extended via the multi-stage hydraulic cylinder 132. As soon as the sand elevator 140 is beyond the wall, it is lowered again and can then be moved back and forth in the sand to be cleaned by swiveling the telescopic arm 130 sideways and by extending and retracting the telescopic arm 130 laterally to its working direction, such as this in figure 14 is shown as an example.
  • the sand elevator can also be used as in figure 15 be used.
  • the sand elevator is aligned in the direction of the telescopic arm 130, i.e. the axis of rotation of the conveying device 170 is perpendicular to the direction of extension of the telescopic arm.
  • the sand elevator 140 can then be moved back and forth by extending and retracting the telescopic arm 130 and can only be moved by turning the rotatable one to the side Clean part 124 or the entire sand cleaning device 110 lane by lane the sand.
  • a further electric or hydraulic motor can be provided at the distal end of the telescopic arm 130.
  • the sand cleaning device 110 has the great advantage that it can also be used to perfectly clean small sand areas that are difficult to access, for example those located beyond an enclosure. For the first time, the cleaning of sandy areas without direct access is also possible. Not all previously described degrees of freedom of movement possibilities of the sand cleaning device have to be realized.
  • the part 124 can also be firmly connected to the chassis 120 .
  • the required rotation of the sand cleaning device then takes place via the crawler tracks 122 or correspondingly provided wheels.
  • the ability to lower and/or actively rotate the sand elevator 140 relative to the distal end of the telescopic arm 130 can be dispensed with.
  • the sand elevator 140 can, for example, also be rotated in the appropriate direction by the operator before the start of work and then fixed to the distal end of the telescopic arm.
  • the ability to move the platform 150 up and down can also be dispensed with, for example if work does not have to be carried out over high enclosures.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
EP21185854.3A 2020-11-16 2021-07-15 Dispositif et procédé de nettoyage du sable Withdrawn EP4001508A1 (fr)

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Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856013A (en) * 1954-10-12 1958-10-14 Joseph C Evans Sand cleaning device with overload release
DE3513454A1 (de) 1985-04-15 1986-10-16 Walter 8000 München Britsch Fahrbare vorrichtung zum ausscheiden von fremdkoerpern aus sand
DE3627015A1 (de) 1986-08-09 1988-02-11 Krupp Gmbh Automatisches regelsystem fuer eine kontinuierliche schnittkantenregelung
FR2623534A1 (fr) * 1987-11-24 1989-05-26 Lange Jean Pierre Appareil pour le ramassage des detritus sur les sols souilles, notamment pour le nettoyage des plages
DE3209134C2 (fr) 1982-03-12 1989-08-10 Rainer 7400 Tuebingen De Maurer
EP0319420B1 (fr) 1987-12-03 1991-03-06 Jean-Claude Thoer Machine automotrice pour le nettoyage des plages
DE4007409A1 (de) 1990-03-06 1991-09-12 Gerhard Huebner Verfahren zum entfernen von fremdkoerpern aus boeden und vorrichtung zur durchfuehrung des verfahrens
DE3437926C2 (de) 1984-10-17 1994-04-28 Horst Wallefeld Vorrichtung zur Reinigung des Sandes von Kinderspielplätzen und Sporteinrichtungen o.dgl.
JPH08302641A (ja) * 1995-04-28 1996-11-19 Misuzu Service Kk 海岸スロープ洗浄装置
DE19853351A1 (de) 1998-11-19 2000-05-25 Guenther Kunad Spielsand-Reinigungsgerät
EP1108816A2 (fr) 1999-12-14 2001-06-20 Rainer Maurer Procédé et dispositif pour le nettoyage de sable
US6266901B1 (en) * 1997-07-11 2001-07-31 Komatsu Ltd. Work machine
DE19960209C1 (de) 1999-12-14 2001-10-25 Rainer Maurer Verfahren und Vorrichtung zur Sandreinigung
JP3956173B2 (ja) * 1998-08-25 2007-08-08 株式会社小松製作所 道床のバラスト除去機械
CN108522447A (zh) * 2017-05-12 2018-09-14 易小兵 一种滩涂作业设备

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856013A (en) * 1954-10-12 1958-10-14 Joseph C Evans Sand cleaning device with overload release
DE3209134C2 (fr) 1982-03-12 1989-08-10 Rainer 7400 Tuebingen De Maurer
DE3437926C2 (de) 1984-10-17 1994-04-28 Horst Wallefeld Vorrichtung zur Reinigung des Sandes von Kinderspielplätzen und Sporteinrichtungen o.dgl.
DE3513454A1 (de) 1985-04-15 1986-10-16 Walter 8000 München Britsch Fahrbare vorrichtung zum ausscheiden von fremdkoerpern aus sand
DE3627015A1 (de) 1986-08-09 1988-02-11 Krupp Gmbh Automatisches regelsystem fuer eine kontinuierliche schnittkantenregelung
FR2623534A1 (fr) * 1987-11-24 1989-05-26 Lange Jean Pierre Appareil pour le ramassage des detritus sur les sols souilles, notamment pour le nettoyage des plages
EP0319420B1 (fr) 1987-12-03 1991-03-06 Jean-Claude Thoer Machine automotrice pour le nettoyage des plages
DE4007409A1 (de) 1990-03-06 1991-09-12 Gerhard Huebner Verfahren zum entfernen von fremdkoerpern aus boeden und vorrichtung zur durchfuehrung des verfahrens
JPH08302641A (ja) * 1995-04-28 1996-11-19 Misuzu Service Kk 海岸スロープ洗浄装置
US6266901B1 (en) * 1997-07-11 2001-07-31 Komatsu Ltd. Work machine
JP3956173B2 (ja) * 1998-08-25 2007-08-08 株式会社小松製作所 道床のバラスト除去機械
DE19853351A1 (de) 1998-11-19 2000-05-25 Guenther Kunad Spielsand-Reinigungsgerät
EP1108816A2 (fr) 1999-12-14 2001-06-20 Rainer Maurer Procédé et dispositif pour le nettoyage de sable
DE19960209C1 (de) 1999-12-14 2001-10-25 Rainer Maurer Verfahren und Vorrichtung zur Sandreinigung
CN108522447A (zh) * 2017-05-12 2018-09-14 易小兵 一种滩涂作业设备

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