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EP3000536A1 - Reinigungsvorrichtung für ein sieb - Google Patents

Reinigungsvorrichtung für ein sieb Download PDF

Info

Publication number
EP3000536A1
EP3000536A1 EP15186397.4A EP15186397A EP3000536A1 EP 3000536 A1 EP3000536 A1 EP 3000536A1 EP 15186397 A EP15186397 A EP 15186397A EP 3000536 A1 EP3000536 A1 EP 3000536A1
Authority
EP
European Patent Office
Prior art keywords
carriage
air
screening
channel
along
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.)
Granted
Application number
EP15186397.4A
Other languages
English (en)
French (fr)
Other versions
EP3000536B1 (de
Inventor
Angelo DA SILVA
Steeve DA SILVA
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.)
ALFYMA INDUSTRIE
Original Assignee
ALFYMA INDUSTRIE
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
Publication date
Application filed by ALFYMA INDUSTRIE filed Critical ALFYMA INDUSTRIE
Publication of EP3000536A1 publication Critical patent/EP3000536A1/de
Application granted granted Critical
Publication of EP3000536B1 publication Critical patent/EP3000536B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/55—Cleaning with fluid jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads
    • B05B13/041—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/10—Screens in the form of endless moving bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned

Definitions

  • the present invention relates to a device for cleaning a screen, and a screening installation comprising such a device.
  • Known screening facilities are particularly intended to separate materials, including waste, according to their particle size.
  • trampoline screens In particular, it is known to use trampoline screens.
  • This type of screen consists of a strip comprising several layers of perforated elastic fabric, attached to transverse bars. The bars are subjected to a linear reciprocating movement that alternately tension and relax portions of webs, bouncing the material deposited on the web.
  • the present invention relates to a cleaning device of the aforementioned type, comprising: at least two fixed rails intended to be arranged near the screen, respectively according to a first and a second parallel axes; and a mobile blowing carriage.
  • Said carriage comprises: a frame provided with displacement means along the fixed rails; and blowing nozzles connected to means for supplying compressed air, said nozzles being intended to be oriented towards the screen.
  • the present invention further relates to a screening apparatus, comprising: a band-shaped screening screen substantially disposed along a third axis; a device for moving the screening strip; and a cleaning device as described above; the third axis being arranged parallel to the first and second axes and the carriage of the nozzle nozzles being oriented towards the screening screen.
  • the present invention further relates to a method of operating a screening plant as described above, comprising the steps of: moving the screening strip; then immobilization of the screening strip; then triggering, by said immobilization, the movement of the movable carriage along the fixed rails and the air blowing through the nozzles in the direction of the screening strip.
  • the installation comprises a housing as described above; during the motion of the screening strip, the carriage is received in the housing, and after moving the carriage along the fixed rails, the carriage returns to the housing.
  • the present invention further relates to a screening installation as described above, provided with means for implementing a method as described above.
  • the screening plant 10 of the figure 1 comprises a screen 11 of elastic material, in the form of a band substantially disposed along a first axis 12.
  • a length of the fabric 11 along the axis 12 is about 7 meters.
  • the fabric 11 is part of a trampoline screen.
  • the axis 12 is shown horizontally, however it is possible to arrange the fabric 11 in an inclined manner with respect to the horizontal.
  • the fabric 11 is shown substantially flat. However, the fabric 11 is preferably arranged so as to form waves, especially if said fabric 11 is part of a trampoline effect screen.
  • the screening screen 11 is equipped with a movement device which will be discussed later, so as to alternately tension and relax portions of the fabric.
  • the screening installation 10 comprises a device 13 for cleaning the fabric 11.
  • the device 13 comprises a carriage 15 disposed above the fabric 11.
  • the carriage 15 comprises a frame 16 of substantially elongated shape, perpendicular to the axis 12.
  • the carriage 15 further comprises means 17 for moving along two fixed rails 18, 19.
  • the means 17 are sliding pads.
  • the pads 17 are coated with a low friction film, for example containing PTFE (or Teflon).
  • the displacement of the carriage 15 is for example ensured by traction chains 20, connected to a motorization means which will be mentioned later.
  • the rails 18, 19 of the device 13 are respectively disposed along a second axis 22 and a third axis 23.
  • the axes 22, 23 are arranged parallel to each other and to the first axis 12.
  • the rails 18, 19 are disposed above the fabric 11, on either side of said strip, the axes 22, 23 forming a substantially horizontal plane.
  • a length of the rails is preferably substantially equal to, or slightly greater than, a length of the fabric 11.
  • at least one of the ends of the rails 18, 19 is provided with a housing (not shown) capable of to receive the carriage 15 when the latter is not in operation.
  • the carriage 15 is shown at figure 2 in a cavalier perspective, from a point of view opposite to that of the figure 1 relative to the plane of the axes 22, 23.
  • the frame 16 comprises two conduits 24, 25 substantially aligned along a fourth horizontal axis 26, perpendicular to the second and third axes 22, 23.
  • Each duct 24, 25 communicates with nozzles 28, 29 for blowing, distributed regularly along a length of the duct.
  • each duct 24, 25 is connected to thirteen nozzles 28, 29.
  • a duct 24 or 25 is approximately 1 m along the axis 26 and the nozzles 28 or 29 are spaced apart by approximately 7.5 cm along the conduit.
  • the nozzles used are composed of several parallel channels located in the same plane to form a set called “knife” or “scraper".
  • the multiple air jets exiting each nozzle are straight and have a large impact force at a compressed air pressure of less than 7 bar.
  • the impact range of these jets is less than 180 mm.
  • the conduits 24, 25 and the nozzles 28, 29 are arranged symmetrically with respect to a plane of symmetry of the frame 16, said plane of symmetry being vertical and parallel to the axes 22, 23.
  • the nozzles 28, 29 are oriented towards the screening web 11.
  • a distance between an outlet of the nozzles 28, 29 and the fabric 11 is about 15 cm.
  • the direction of the nozzles is oblique with respect to the first axis 12 in a vertical plane.
  • the direction of the nozzles forms with the first axis 12 an angle of between 30 ° and 90 ° and preferably close to 45 °.
  • the nozzles are oriented forwardly with respect to the direction of movement of the frame 16 along the rails 18, 19. According to one variant, it is possible to orient the nozzles substantially perpendicularly to the axis 12 and to the surface of the canvas 11.
  • the frame 16 carries two collectors 32, 33 of air, positioned laterally on either side of the plane of symmetry of the frame 16.
  • An inlet mouth 36, 37 of each duct 24, 25 is connected to a collector 32, 33.
  • the collector 32 connected to the conduit 24 is particularly visible at the figure 2 .
  • the description below of the collector 32 and the duct 24 also applies to the other collector 33 and to the other duct 25.
  • a side face 40 of the manifold 32 has an air inlet port 41.
  • the orifice 41 has the form of two longitudinal slots, located one above the other and separated by a blade 42.
  • the face 40 of the collector 32 is intended to come into contact with a rail 18, as shown in FIG. figure 1 .
  • the frame 16 is connected to the collector 32 by compression springs 43. Some of the springs 43 are shown in detail at figures 3 and 4 .
  • a similar device connects the frame 16 to the other manifold 33.
  • the duct 24 comprises two vents 36, 44 of air inlet.
  • Each of said mouths connects one end of the manifold 32, along the second axis 22, to one end of the duct 24 along the fourth axis 26.
  • This air supply at each end of the duct 18 facilitates a pressure equalization in the nozzles 28.
  • Each end of the face 40, along the axis 22, is connected to a tab 45, 46.
  • the tabs 45, 46 deviate from the rail 18 and are inclined towards the other rail 19.
  • a tab 45, shown in detail in FIGS. figures 3 and 4 thus forms a ramp 47 oriented obliquely with respect to the lateral face 40 of the manifold 32.
  • the other tab 46 has a similar shape.
  • the rails 18, 19 comprise channels 48, 49 able to transfer compressed air to the collectors 32, 33.
  • the channels 48, 49 are respectively disposed along the second axis 22 and the third axis 23.
  • a channel 48 is visible in FIG. longitudinal section at the figure 3 and in cross-section at the figure 4 .
  • the channels 48, 49 are equipped with valves 50 arranged at regular intervals along the axes 22, 23.
  • a distance 51 ( figure 1 ) between two consecutive valves 50 on a channel 48, 49 is less than a length 52 ( figure 2 ) slots forming the inlet orifice 41 of the collectors 32, 33.
  • a valve 50 of the channel 48 is shown in detail at figures 3 and 4 .
  • the description below of channel 48 also applies to the other channel 49.
  • the valve 50 comprises a helical compression spring 53 located inside the channel 48.
  • the spring 53 is arranged transversely with respect to the axis 22.
  • One end 55 of the spring 53 is integral with a wall of the channel 48.
  • Another movable end of the spring 53 is connected to a plug 56, said plug being also located inside the channel 48.
  • spring 53 plate the cap 56 against an orifice 57 of a wall 58 of the channel 48, so as to obstruct said orifice.
  • An outer face of the wall 58 is intended to come into contact with the lateral face 40 of the collector 32.
  • a ball 60 On the plug 56 is mounted a ball 60.
  • the ball 60 passes through the orifice 57 and forms an outward projection of the channel 48.
  • the ball 60 is rotatable relative to the cap 56, about an axis perpendicular to the second axis 22 and the fourth axis 26. More specifically, the ball is able to roll against the collector 32 when said collector moves according to the axis 22.
  • the spring 53 In the closed position of the valve 50, the spring 53 is in a partially compressed state, so as to exert a force towards the plug 56. A pressure exerted in the opposite direction on the ball 60 and / or the plug 56 increases the compression of the spring 53 and discards the plug 56 of the orifice 57.
  • the inside of the channel 48 In this so-called open position of the valve 50, the inside of the channel 48 is in communication with the outside via the orifice 57. As it will be explained further, the open position allows in particular to transfer compressed air into a manifold 32,33 through the orifice 41 of the collectors.
  • the screening installation 10 further comprises an electronic device 70 for operating the installation, according to a method which will be detailed below.
  • the device 70 is schematically represented at the figure 5 .
  • the device 70 typically comprises a program memory in which is stored a program 71 implementing the various steps of the method.
  • the device 70 is able to actuate a device 72 for moving the screening fabric 11.
  • the device 70 is also able to actuate a motor 73.
  • the motor 73 is for example connected to pinions (not shown) on which the traction chains of the carriage 15 are mounted. The startup of the motor 73 moves the carriage 15 along the rails 18, 19, the pads 17 sliding on the rails.
  • the device 70 is also able to actuate a compressor 75 which sends compressed air into the channels 48, 49.
  • the carriage 15 and the rails 18, 19 are arranged below the fabric 11, the nozzles 28, 29 remaining oriented towards the fabric 11.
  • the installation 10 comprises two cleaning devices, similar to the device 13 described above. More specifically, each cleaning device comprises a carriage 15 and rails 18, 19 as described above. One of said cleaning devices is disposed above the fabric 11 and the other of said cleaning devices is disposed below the fabric 11, the nozzles 28, 29 of each carriage remaining oriented towards said fabric.
  • a screening of materials placed on the fabric 11 is made.
  • the fabric 11 is set in motion by the device 72.
  • the carriage 15 is preferably in a housing located at one end of the rails 18, 19.
  • the device 72 stops working and the fabric 11 stops.
  • the program 71 then performs a unclogging step of the web 11.
  • the compressor 75 is started to supply compressed air to the channels 48, 49.
  • the supply pressure is about 5 bars.
  • the motor 73 is started to move the carriage 15 along the rails 18, 19.
  • the speed of movement of the carriage 15 is 25 mm / s.
  • each of the collectors 32, 33 slides along the wall 58 of each of the channels 48, 49.
  • the oblique ramp 47 gradually pushes the ball 60 towards the inside of the channel 48 or 49.
  • the orifice 57 is thus open when it is opposite the inlet orifice 41 collector air 32 or 33.
  • the distance 51 between two valves 50 is less than the length 52 of the inlet orifice 41 of the collectors 32, 33.
  • said collectors are always in contact with an open orifice 57 and the supply of compressed air nozzles 28, 29 are continuous during the movement of the carriage 15.
  • the carriage 15 travels the entire length of the rails 18, 19 while the nozzles 28, 29 blow jets of compressed air.
  • the supply of compressed air is interrupted and the carriage 15 travels the rails 18, 19 in the opposite direction to reach its housing.
  • the supply of compressed air is maintained during the course of the carriage in the opposite direction, to double the duration of the unclogging step.
  • the program 71 provides several round trips of the carriage 15 on the rails 18, 19 to extend the duration of the unclogging step.
  • each of the carriages 15 operates in a manner similar to that described above.
  • the two carriages 15 move in relation to one another with respect to the fabric 11.
  • the carriages are moved in an offset manner.

Landscapes

  • Cleaning In General (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP15186397.4A 2014-09-23 2015-09-23 Reinigungsvorrichtung für ein sieb Active EP3000536B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1458972A FR3026029B1 (fr) 2014-09-23 2014-09-23 Dispositif de nettoyage d'un crible

Publications (2)

Publication Number Publication Date
EP3000536A1 true EP3000536A1 (de) 2016-03-30
EP3000536B1 EP3000536B1 (de) 2022-01-05

Family

ID=51897330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15186397.4A Active EP3000536B1 (de) 2014-09-23 2015-09-23 Reinigungsvorrichtung für ein sieb

Country Status (2)

Country Link
EP (1) EP3000536B1 (de)
FR (1) FR3026029B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115301546A (zh) * 2022-09-07 2022-11-08 南京林业大学 一种多模式的气吹式清筛装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113857034A (zh) * 2021-10-13 2021-12-31 双牌县丰泰农机设备有限公司 一种振动清理筛

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1269298A (fr) * 1960-06-30 1961-08-11 Aussie Mfg Ltd Procédés et appareils de décolmatage des tamis de calibrage des matières en grains

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1269298A (fr) * 1960-06-30 1961-08-11 Aussie Mfg Ltd Procédés et appareils de décolmatage des tamis de calibrage des matières en grains

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115301546A (zh) * 2022-09-07 2022-11-08 南京林业大学 一种多模式的气吹式清筛装置

Also Published As

Publication number Publication date
EP3000536B1 (de) 2022-01-05
FR3026029A1 (fr) 2016-03-25
FR3026029B1 (fr) 2020-01-31

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