• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    14 ABSTRACT The invention relates to a debarking system for debarking roundwood. Thesystem comprises a debarking section (200) comprising a rotatably arrangeddebarking drum (201) having a wall (202) extending from an inlet (203) of thedebarking drum (201) to an outlet (204) of the debarking drum (201). The innerenvelope surface (214) of the debarking drum (201) has a plurality of webs (215)extending in the longitudinal direction of the debarking drum (201) and a plurality oftoothed elements (216, 217) extending between the webs (215) along the innerenvelope surface (214) of the debarking drum (201). To be published: Fig 2
    公开号:SE1551353A1
    申请号:SE1551353
    申请日:2015-10-21
    公开日:2017-04-22
    发明作者:Lindbäck Jan
    申请人:Endurance Sweden Ab；
    IPC主号:
    专利说明:

    DEBARKING SYSTEM FIELD OF THE INVENTIONThe present invention relates to a debarking system.
    BACKGROUND OF THE INVENTION Debarking of roundwood is made as a pretreatment of pulp wood beforechipping the same. The purpose is to lay bare the wood while at the same time notcause any unnecessary damage to the same. Thus, even though debarking is asevere mechanical treatment of the roundwood, the treatment should be as carefulas possible to the wood.
    Debarking is typically made by tumbling the roundwood in a longitudinal drumwhile feeding the roundwood along the same. The interior walls of the drum areprovided with lifters. Thereby, as the roundwood is tumbled along the drum theconstant collisions between the roundwood as such and the contact with the lifterswill cause a debarking.
    The debarked roundwood may be transferred past a stone trap beforechipping. The stone trap is typically made as a passage right below the transfer beltthrough which any stones fall to a container due to gravity. ln order of emptying thesame, the complete debarking system must be stopped in order of allowing accessto the stone trap. This is a costly process due to the production stop.
    Known debarking systems are generally stationary, very expensive andrequires a huge footprint. Also, they are typically known as wet systems in which theroundwood is subjected to water before debarking to remove loose items such asgravel and scrap. The drawback is that the removed bark will have unnecessary highwater content.
    There is a need for a cheaper debarking system which system has a highefficiency in debarking while still not causing unnecessary damage to the underlyingwood. Damages to the wood cause undue losses of wood that goes to wastetogether with the bark rather than forming chipped wood to be used when making pulp.
    SUMMARY OF THE INVENTIONlt is noted that the invention relates to all possible combinations of featuresrecited in the claims.
    According to a first aspect, the invention relates to a debarking system fordebarking roundwood, comprising a debarking section comprising a rotatablyarranged debarking drum having a wall extending from an inlet of the debarkingdrum to an outlet of the debarking drum, said wall having an inner envelope surface,wherein the inner envelope surface has a plurality of webs extending in the|ongitudina| direction of the debarking drum and a plurality of toothed elementsextending betvveen the webs along the inner envelope surface of the debarkingdrum.
    By the inner envelope surface of the debarking drum comprising acombination of a plurality of webs and a plurality of toothed elements, roundwoodentering the debarking drum during rotation thereof will be caused to tumble aroundinside the debarking drum and randomly hit each other, the inner envelope surfaceof the debarking drum, the webs and the toothed elements. The degree of tumblingand thus the mechanical Working of the roundwood is determined by the rotationalspeed of the debarking drum and the efficiency of the webs and the toothedelements.
    The debarking will primarily be caused by the roundwood randomly collidingwith each other. Debarking will also be promoted by the roundwood hitting the websand also hitting the toothed elements. Still, the primarily purpose of the toothedelements is to shred away bark by engaging notches in the bark caused by theroundwood colliding with each other during the tumbling.
    The toothed elements may be divided into a first group comprising a pluralityof toothed elements and a second group comprising a second plurality of toothedelements wherein the toothed elements of the first group are arranged adjacent theinlet of the debarking drum and in a V-shaped pattern along the circumference of theinner envelope surface of the debarking drum, and wherein the toothed elements ofthe second group are arranged downstream the inlet of the debarking drum and inan inclined pattern along the circumference of the inner envelope surface of thedebarking drum.
    By the V-shaped pattern of the toothed elements of the first group, theroundwood entering the debarking drum will be subjected to an immediateaggressive surface treatment facilitating debarking.
    By the inclined arrangement of the toothed elements of the second group afeeding effect of the roundwood may be achieved as the debarking drum rotates.
    The webs may have a non-equilateral triangular cross section. As the roundwood hits the webs along the inner envelope surface of the debarking drum,the triangular cross section of the webs will cause a lifting action of the roundwood further affecting the degree of tumbling. By the non-equilateral triangular crosssection the lifting action will be more intense if the roundwood meet the acutesurface than the obtuse surface. This is decided by the rotational direction of thedebarking drum. lf the debarking drum is rotated in a clock wise direction, theroundwood will meet the acute surface and thus be subjected to less resistance thanif the debarking drum was to be rotated in the counter clockwise direction where theroundwood would instead meet the obtuse surface. Accordingly, if rotated clockwise,the tumbling effect would be higher than if rotated in the counter-clockwise direction.The rotation direction can be decided by the type of roundwood to be debarked.
    The debarking drum may be segmented as seen in the longitudinal extensionthereof into at least two different types of segments, a first type of segment and asecond type of segment, wherein in the first type of segments, the wall is providedwith a plurality of through holes and wherein in the second type of segments, the wallis solid. The two types of segments are preferably arranged in an alternating mannerone after the other. The second type sections having a solid wall are preferably usedas a driving portion adapted to cooperate with externally arranged drivers causingrotation of the debarking drum.
    The system may further comprise a stationary outlet drum having an inletarranged in communication with the outlet of the debarking drum and an outlet,wherein the outlet of the outlet drum is provided with openable and closeable portelements. By the port elements a controllable restriction allowing controlled dwelltime of the roundwood inside the debarking drum may be provided.
    The system may further comprise a stone trap section being arranged in aposition downstream the debarking drum section and wherein the stone trap sectioncomprises a conveyor comprising at least two consecutive conveyor portionsseparated by a gap, the second conveyor portion being arranged to be operated witha higher conveyor speed than the first conveyor portion, and wherein said gap hasan extension as seen in the travelling direction of the conveyor portion of 0.1-1.5meters. By the different speeds, a better separation of the roundwood is achievedthereby allowing an improved removal of foreign items. Further, by the gap, the lowersurface of passing roundwood is freely exposed, thereby allowing larger free foreignitems to fall off.
    The stone trap section may further comprise a waterjet arrangementcomprising a plurality of nozzles arranged in a position above the conveyor, wherebythe plurality of nozzles are arranged to direct waterjets towards the upper side ofroundwood being arranged to passing by on the conveyor. By the waterjets, anyloose particles such as gravel and bark will be removed.
    The stone trap section may further comprise a water arrangement arrangedalong said gap and being arranged to supply water from below towards roundwoodbeing arranged to travel across the gap thereby releasing and removing any foreignitems travelling together with the roundwood.
    By the gap, a free access surface of the roundwood is provided for wherebythe water flushing from below may remove and flush away gravel and other looseitems such as loosely hanging shreds of bark. Heavier foreign items such as stonesand scrap will fall off due to the gravity and may be collected at the bottom of theunderlying water pool.
    The stone trap section may further comprise a container arranged in aposition adjacent the longitudinal direction of the conveyor, said container beingarranged to receive any foreign items released in the stone trap section.
    By the container being arranged adjacent the conveyor, the collected foreignitems may be removed from the container without the need of closing down thesystem.
    The system may further comprise a conveyor section arranged to extendbelow and past the debarking section, whereby the conveyor section comprises aconveyor adapted to receive bark removed from the roundwood travelling throughthe debarking drum and transport the received bark away from the system.
    BRIEF DESCRIPTION OF THE DRAWINGS The above as well as additional objects, features and advantages of thepresent invention, will be better understood through the following illustrative and non-limiting description of preferred embodiments of the present invention, with referenceto the appended drawings where the same reference numbers will be used forsimilar elements.
    Fig. 1 discloses one example of the overall design of the debarking systemwith its sections.
    Fig. 2 is a view of the debarking drum as seen from the infeed.
    Fig. 3 discloses one embodiment of the port elements at the outlet drum.
    Fig. 4 discloses one embodiment of the stone trap section.
    Fig. 5 is a flow chart representing the operation of the debarking system.
    DETAILED DESCRIPTIONThe present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forthherein; rather, these embodiments are provided for thoroughness and completeness,and fully convey the scope of the invention to the skilled person.
    Referring to Fig. 1 the overall design of the inventive debarking system 1 fordebarking roundwood is disclosed. As seen from the left, the system comprises aninfeed section 100, a debarking section 200, a conveyor section 300 for releasingremoved bark, a stone trap section 400, a monitoring section 500 and a chippingsection 600.
    Starting with the infeed section 100, this comprises a conveyor 101 which isarranged to receive roundwood to be debarked. The roundwood may be suppliedthereto by a crane (not disclosed) or the like. The conveyor 101 comprises a pluralityof parallel chains 102 extending in a continuous loop. The infeed section 100 isdriven by a motor (not disclosed). The speed of the conveyor 101 is preferablyvariable. The infeed section 100 is provided with longitudinal wall portions 103extending in parallel with the conveyor 101 on opposite sides thereof. lt goes withoutsaying that other conveyor solutions than chains are possible.
    The infeed section 100 merges with the debarking section 200 via an guidingdrum 104. The guiding drum 104 is preferably stationary. The conveyor101 mayextend at least partly into the guiding drum 104. The purpose of the guiding drum104 is to better align the roundwood before entering the debarking section 200.
    The infeed section 100 communicates with the debarking section 200. Thedebarking section 200 comprises a rotatably arranged debarking drum 201 having awall 202 extending from an inlet 203 of the debarking drum 201 to an outlet 204 ofthe drum 201.
    The debarking drum 201 is segmented as seen in the longitudinal extensionthereof. ln the disclosed embodiment two types of segments 205, 206 are used. Thetwo types of sections 205, 206 are alternately arranged along the longitudinalextension of the debarking drum 201. The opposing ends of the segments areprovided with radially extending flanges 207 allowing the segments 205, 206 to beinterconnected, e.g. by bolting.
    The first type sections 205 may differ in length. ln the disclosed embodimentthe debarking drum 201 is composed of two segments 205 of the first type having afirst length 205a and two segments of the first type having a second length 205b.
    The wall 208 of the first type of segments 205 is provided with a plurality ofthrough holes 209. The through holes 209 are arranged to release bark which hasbeen removed from the roundwood during debarking inside the debarking drum 201.The second type of segments 206 preferably has a solid wall 210.
    The debarking drum 201 is arranged on a support 211 resting on the ground.The support 211 is provided with three sets of opposite drivers 212a, 212b, one oneach side of the debarking drum 201. The drivers 212a, 212b are arranged tointeract with the exterior envelope surface of the solid wall 210 of the second type ofsegments 206 by applying a radial pressure thereto via two or more rotating wheels213. The drivers 212a, 212b may either be active or passive. By active is in thiscontext meant that the wheels 213 are motor driven. By passive is meant that thewheels 213 only act as roller bearings. ln the disclosed embodiment the tvvooutermost sets 212a are active and are thus arranged to rotate the debarking drum201 whereas the middle set 212b is passive and thus more or less acts as a radialsuppon.
    Now turning to Fig. 2 the interior of the debarking drum 201 is disclosed asseen from the inlet 203 thereof.
    The inner envelope surface 214 has a plurality of webs 215 extending in thelongitudinal direction of the debarking drum 201. ln the disclosed embodiment eightwebs 215 are evenly distributed along the circumference of the inner envelopesurface 214. The webs 215 have a non-equilateral triangular cross section with itsbase being in contact with the inner envelope surface 214. The legs of the triangleform one acute angle oi and one obtuse angle ß in view of the base. By way ofexample the acute angle oi may be 30 degrees and the obtuse angle ß 60 degrees.ln one non-limiting example, the height h of the triangular cross section as seen inthe radial direction of the debarking drum 201 may be 100 mm and the base b 500mm.
    The inner envelope surface 214 of the debarking drum 201 further comprisesa plurality of toothed elements 216, 217 extending between the webs along the innerenvelope surface of the drum. The toothed elements 216, 217 are arranged asledges extending between adjacent webs and forming an angle thereto. ln thedisclosed embodiment the toothed elements are divided into a first group comprisinga plurality of the toothed elements 216 and a second group comprising a secondplurality of the toothed elements 217. ln the first group which is arranged adjacent the inlet 203, the toothedelements 216 are arranged in a V-shaped pattern along the circumference of theinner envelope surface 214 of the debarking drum 201. The angle u between twoadjacent toothed elements is preferably within the range of 20-60 degrees and morepreferred 30-50 degrees. By this arrangement the roundwood entering the debarkingdrum 201 will be subjected to an intermediate aggressive surface handling facilitatingdebarking.
    The second group of toothed elements 217 is arranged downstream the inlet203 and a plurality of such second groups may be arranged one after the other alongthe longitudinal extension of the debarking drum 201. ln the disclosed embodimenttwo such second groups are used. The toothed elements 217 of the second groupare arranged in an inclined pattern where each toothed element is arranged with anangle Å in the range of 10-40 degrees and more preferred 20-30 degrees as seentransverse the longitudinal center line of the debarking drum. By the inclinedarrangement a feeding effect of the roundwood may be achieved as the debarkingdrum 201 rotates. The toothed elements 217 may be arranged with gaps as seen inthe circumferential direction of the debarking drum 210 or be arranged with a partialoverlap.
    The toothed elements 216, 217 are preferably arranged along the innerenvelope surface 214 of the second type segments 206. Thereby the toothedelements 216 will not interfere with the through holes 209 in the wall 202.
    As an alternative to the toothed elements 216, 217 being constituted byledges, the toothed elements may be constituted by a plurality of standalone teeth(not disclosed), and wherein a plurality of such teeth are arranged side by side alonga line extending betvveen two adjacent webs and forming an angle thereto.
    The debarking section 200 may be covered by a non-disclosed roofing.
    The outlet 204 of the debarking drum 201 communicates with the inlet of astationary outlet drum 221 which is best seen in Fig. 3. To facilitate understanding anumber of features are removed. The outlet drum 221 comprises a casing 222. Thecasing 222 has an open bottom portion 223. The bottom portion 223 is provided witha conveyor 224 forming a closed loop extending along the outlet drum 221 in adirection towards the stone trap section 400 to be discussed below. The outlet drum221 serves the purpose of aligning the debarked roundwood leaving the debarkingdrum 201.
    The outlet 218 of the outlet drum 221 is provided with two port elements219a, 219b. The purpose of the port elements 219a, 219b is to allow a controllablerestriction allowing controlled dwell time of the roundwood inside the debarking drum201. lt goes without saying that the number of port elements 219a, 219b and theirdesign may differ. ln the disclosed embodiment the two port elements differ ingeometry, however the geometry may be the same. Also, the port elements may beomitted.
    The port elements 219a, 219b are each suspended in a respective hinge 220.By pivoting the port elements 219a, 219b around the hinges 220 the size of theoutlet 218 may be varied depending on desired dwell time. The pivoting may by way example be hydraulically operated. The dwell time depends on parameters such astype of roundwood, rotation speed of the debarking drum 201, efficiency of thetoothed elements 216, 217 etc.
    Now turning anew to Fig. 1, the conveyor section 300 is arranged to extendbelow and past the debarking section 200. The conveyor section 300 is arranged toreceive bark that has been released from the debarking drum 201 via the throughholes 209 in the wall 208.
    The conveyor section 300 comprises a conveyor 301 adapted to receive barkwhich is released via the through holes 209 of the debarking drum 201 and transfersthe bark towards an elevator 302 or the like that receives and transfers away thebark from the system. The conveyor 301 may be in the form of a rubber belt or thelike.
    A stone trap section 400 is arranged downstream the debarking section 200.The stone trap section 400 is best seen in Fig. 4. The stone trap section 400comprises a conveyor 401 which in the disclosed embodiment is divided into threeconveyor sections 401a-401c. ln the disclosed embodiment each conveyor section401a-401c comprises three or four rolls 402 arranged side by side transverse thelongitudinal extension of the conveyor. lt goes without saying that the number of rollsmay differ. Also, other conveyor means than rolls are possible.
    The conveyor sections 401a-401 c are each operated with different speeds.The speed is increased as seen in downstream direction. Thus the second conveyorsection 401b is arranged to be operated at a higher speed than the first conveyorsection 401a.
    The rolls 402 are preferably provided with projections 410 extending alongtheir envelope surfaces. The projections 410 may be arranged in circumferentiallystraight pattern or a spirally winding pattern. The projections 410 facilitate feedingand separation of the roundwood.
    A gap 403 is formed between two consecutive conveyor sections 401 a, 401 b.The gap 403 has an extension as seen in the travelling direction of the conveyor of0.1-1.5 meters. The purpose of the gap 403 is to allow any foreign items travellingtogether with the roundwood to be released and fall down through the gap 403.Foreign items may be by way of example stones and scrap. Also, by the gap, thelower side of the roundwood will be freely exposed.
    To facilitate removal of foreign items the stone trap section 400 comprises awaterjet arrangement 404. The waterjet arrangement comprises a plurality ofnozzles 405 arranged in a position above the conveyor 401. The nozzles 405 arearranged to direct waterjets towards the upper side of the roundwood thereby removing any loose particles such as gravel and bark. lt is to be understood that asan alternative to water airjets may fulfill the same purpose.
    Further, the stone trap section 400 comprises a water arrangement 406 beingarranged below the gap 403. The water arrangement 406 comprises a pool 407where water is pumped from below towards the roundwood passing across the gap403. The pumping should be made to such extent that the water flushes theroundwood from below and separates the roundwood thereby allowing the looseparticles to be flushed away together with the water. At the same time larger itemswill due to gravity fall to the bottom of the pool 407. The pool 407 communicates witha container 408 being arranged in a position adjacent the longitudinal direction of theconveyor 401. The container 408 is arranged to receive and collect any foreign itemsreleased.
    The container may be provided with a chamfered bottom portion allowingeasy grasping of the collected items by means of a ladle or gripper. Such ladle orgripper may be operated by the same crane that is used to load the infeed section100.
    A monitoring section 500 is arranged downstream the stone trap section 400.The monitoring section 500 comprises a conveyor aligned with the conveyor 401 ofthe stone trap section 400. The monitoring section 500 comprises oppositelongitudinal wall portions 502 extending in parallel with the conveyor 501 on oppositesides thereof. The monitoring section 500 is preferably provided with a metaldetector (not disclosed) which is used to scan the debarked and cleaned roundwood.ln case any metal item is detected the debarking system is stopped allowing manualremoval of the detected item.
    As one additional safety measure, the monitoring section may furthercomprise a control room 503. The control room 503 is preferably provided withwindows (not shown) allowing ocular inspection of all items passing by on theconveyor 501. Should any foreign items be detected the system could be manuallystopped. lt goes without saying that the items passing by also could be monitored bycameras and any digital image processing system.
    The debarking system further comprises a chipping section 600. The chippingsection 600 comprises a chipper 601 adapted to chip the roundwood. The resultingchips are due to the rotational speed of the chipper wheel (not disclosed) ejected viaan outlet 602 for further processing. ln the following the operation of the debarking system will be explained withreference to the flow chart of Fig. 5 and the technical features which are best seen inFigs. 1 and 2.
    As a first step 1000, roundwood is arranged by means of a crane (notdisclosed) onto the conveyor 101 of the infeed section 100. The roundwood is moreor less in a disorder due to the handling by the crane.
    The conveyor101 transfers the roundwood through the guiding drum 104,step 2000, where the roundwood is aligned to some extent while passing the guidingdrum 104.
    As the roundwood enters the rotating debarking drum 201, step 3000, theroundwood is caused to tumble around inside the debarking drum 201 and randomlyhit each other, the inner envelope surface 214 of the debarking drum 201, the webs215 and the toothed elements 216, 217. The degree of tumbling and thus themechanical working of the roundwood is determined by the rotational speed of thedebarking drum 201 and the efficiency of the webs 215 and the toothed elements216, 217. As the roundwood hits the webs 215 the triangular cross section of thewebs 215 will cause a lifting action of the roundwood further affecting the degree oftumbling. By the non-equilateral triangular cross section the lifting action will be moreintense if the roundwood meet the acute than the obtuse surface of the web. This isdecided by the rotational direction of the debarking drum 201. lf the debarking drum201 is rotated in a clock wise direction, the roundwood will meet the acute surfaceand thus be subjected to less resistance than if the debarking drum 201 was to berotated in the counter clockwise direction where the roundwood would instead meetthe obtuse surface. Accordingly, if rotated clockwise, the tumbling effect would behigher than if rotated in the counter-clockwise direction. The rotation direction can bedecided by the type of roundwood to be debarked. The debarking will primarily becaused by the roundwood randomly colliding with each other. Debarking will also bepromoted by the roundwood hitting the webs 215 and also hitting the toothedelements 216, 217. Still, the primarily purpose of the toothed elements 216, 217 is toshred away bark by engaging notches in the bark caused by the roundwood collidingwith each other during the tumbling.
    The inclined toothed elements 216, 217 will also strive to feed the roundwoodin a downstream direction along the rotating debarking drum 201 in a directiontowards the outlet thereof.
    The removed bark will leave the debarking drum, step 4000, via the throughholes 209 in the wall 208 of the debarking drum 201 and fall down onto the conveyor301 of the conveyor section 300. The conveyor 301 receives and transfers the barktowards the elevator 302 that transfers away the bark from the system. By anelevator the bark may be directly transferred to e.g. a container or a trailer. 11 As the debarked roundwood exits the debarking section 200, they aretransferred on a conveyor 401 past the stone trap section, step 5000. By theconveyor 401 is divided into three conveyor sections 401a-401c, where eachconveyor section as seen in the downstream direction has an increased speed theroundwood will be mutually separated on the conveyor. The roundwood is flushed bywaterjets from above causing removal of gravel and any other loose items such asloosely hanging shreds of bark. Further, the roundwood will be subjected to a waterflush from below facilitating removal of such loose particles. Heavier foreign itemssuch as stones and scrap will fall due to the gravity to the bottom of the underlyingpool 407 which communicates with the container 408 next to the conveyor 401. Thethus collected foreign items may be removed from the container 408 without theneed of closing down the system.
    The cleaned and debarked roundwood is conveyed along the monitoringsection 500, step 6000. While passing the monitoring section 500 the roundwood willbe subjected to a metal detector and/or an ocular inspection. ln case of detection ofany foreign items, the complete system may be stopped to allow manual removal.
    Finally, the roundwood is transferred to the chipping section 600, step 7000,where they are chipped by a chipper. The resulting chips are ejected for furtherprocessing.
    The debarking system according to the invention may be provided as astationary or a movable system. Thus, the sections are preferably provided asmodules allowing easy assembling and disassembling.
    The inventive debarking system is to be considered as a dry system, i.e. thelogs are debarked in a dry condition. This is an essential difference to many knownsystems where the roundwood is flushed with water before entering the debarkingdrum in order of removing any loose particles such as gravel, scrap etc. By such wetsystems the water content of the removed bark will be unnecessary high. Accordingto the inventive system no water is supplied during the debarking but first afterwardsand then only to the debarked logs.
    Additionally, variations to the disclosed embodiments can be understood andeffected by the skilled person in practicing the claimed invention, from a study of thedrawings, the disclosure, and the appended claims. ln the claims, the word"comprising" does not exclude other elements or steps, and the indefinite article "a"or "an" does not exclude a plurality. The mere fact that certain measures are recitedin mutually different dependent claims does not indicate that a combination of thesemeasured cannot be used to advantage.
    权利要求:
    Claims (10)
    [1] 1. Debarking system for debarking roundwood, comprising a debarking section(200) comprising a rotatably arranged debarking drum (201) having a wall (202)extending from an inlet (203) of the debarking drum (201 ) to an outlet (204) of thedebarking drum (201), said wall (202) having an inner envelope surface (214),wherein the inner envelope surface (214) has a plurality of webs (215) extending in the longitudinal direction of thedebarking drum (201) and a plurality of toothed e|ements(216, 217) extending between the webs (215)along the inner envelope surface (214) of the debarking drum (201).
    [2] 2. Debarking system according to c|aim 1, wherein the toothed elements (216,217) are divided into a first group comprising a plurality of toothed elements (216)and a second group comprising a second plurality of toothed elements (217), wherein the toothed elements (216) of the first group are arranged adjacentthe inlet (203) of the debarking drum (201) and in a V-shaped pattern along thecircumference of the inner envelope surface (214) of the debarking drum (201), and wherein the toothed elements (217) of the second group are arrangeddownstream the inlet (203) of the debarking drum (201) and in an angularlystaggered pattern along the circumference of the inner envelope surface (214) of thedebarking drum (201).
    [3] 3. Debarking system according to c|aim 1, wherein the webs (215) have a non-equilateral triangular cross section.
    [4] 4. Debarking system according to c|aim 1, wherein the debarking drum (201) issegmented as seen in the longitudinal extension thereof into at least tvvo differenttypes of segments, a first type of segments (205) and a second type of segments(206), wherein in the first type of segments (205), the wall (208) is provided with aplurality of through holes (209) and wherein in the second type of segments (206)the wall (210) is solid.
    [5] 5. Debarking system according to c|aim 1, further comprising a stationary outletdrum (221) having an inlet arranged in communication with the outlet of thedebarking drum and an outlet (218), wherein the outlet (218) of the outlet drum (221)is provided with openable and closeable port elements (219a, 219b). 13
    [6] 6. Debarking system according to claim 1, wherein the system furthercomprises a stone trap section (400) being arranged in a position downstream thedebarking drum section (200) and wherein the stone trap section (400) comprises aconveyor (401) comprising at least two consecutive conveyor portions (401 a, 401 b,401c) separated by a gap (403), the second conveyor portion (401b) being arrangedto be operated with a higher conveyor speed than the first conveyor portion (401 a),and wherein said gap (403) has an extension as seen in the travelling direction of theconveyor (401) of 0.1-1.5 meters.
    [7] 7. Debarking system according to claim 6, wherein the stone trap section (400)further comprises a waterjet arrangement (404) comprising a plurality of nozzles(405) arranged in a position above the conveyor (401), whereby the plurality ofnozzles (405) are arranged to direct waterjets towards the upper side of roundwoodbeing arranged to passing by on the conveyor.
    [8] 8. Debarking system according to claim 6, wherein the stone trap section (400)further comprises a water arrangement (406) arranged along said gap (403) andbeing arranged to supply water from below towards roundwood being arranged totravel across the gap (403) thereby releasing and removing any foreign itemstravelling together with the roundwood.
    [9] 9. Debarking system according to any of claims 6-8, wherein the stone trapsection (400) further comprises a container (408) arranged in a position adjacent thelongitudinal direction of the conveyor (401), said container being arranged to receiveany foreign items released in the stone trap section (400).
    [10] 10. Debarking system according to claim 1, wherein the system furthercomprises a conveyor section (300) arranged to extend below and past thedebarking section (200), whereby the conveyor section comprises a conveyor (301)adapted to receive bark removed from the roundwood travelling through thedebarking drum and transport the received bark away from the system.
    类似技术:
    公开号 | 公开日 | 专利标题
    US8201599B2|2012-06-19|Debarking mechanism and method
    CA2069022C|1999-11-30|Flail drum system
    KR20140102411A|2014-08-22|Separator machine of Oyster
    US2710097A|1955-06-07|Apparatus for recovering sugar cane from leaf trash
    US5322104A|1994-06-21|Flail drum machines and methods
    SE1551353A1|2017-04-22|Debarking system
    FI76511C|1988-11-10|Bark separation device
    US2943656A|1960-07-05|Pulpwood-debarking drum having angularly slotted wall and stationary shearing bars
    CN206043264U|2017-03-29|A kind of automatic clearing apparatuss
    CN107791352A|2018-03-13|A kind of improved pulping and paper-making automatic discharging bark peeling machine
    EP0527388B1|1999-05-26|Equipment for deoiling swarf resulting from machining operations
    FI59212B|1981-03-31|ANORDNING FOER TRAEDAVBARKNING
    CN106070527A|2016-11-09|Automatic clearing apparatus
    CN101947802A|2011-01-19|Curved-tooth roller-type peeler
    CN104070583B|2016-05-25|A kind of lobe closes slide tube type lumber stripper
    CN206375347U|2017-08-04|It is a kind of to prevent the protection device of belt longitudinal tear
    CA2318676A1|2001-08-28|Wood aligning and orienting conveyor
    RU2336992C2|2008-10-27|Debarking device
    FI59823B|1981-06-30|FOER FARING RIVNING AV MASSABALAR OCH MASKIN HAERFOER
    KR100854167B1|2008-08-26|Hong crab crab meat extraction device
    CN212801004U|2021-03-26|Tearing machine applied to bamboo extract or paper making pulp
    CN215856188U|2022-02-18|Anti-hardening device for receiving plate in water-washed slag rotary drum
    RU134521U1|2013-11-20|ROLLING SECTION FOR SORTING BY THE LENGTH OF TRANSPORTED FORESTRY
    CN107775762A|2018-03-09|A kind of pulping and paper-making automatic discharging bark peeling machine
    CN104552523B|2018-05-08|Bark peeling machine
    同族专利:
    公开号 | 公开日
    SE539456C2|2017-09-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2018-05-29| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1551353A|SE539456C2|2015-10-21|2015-10-21|Debarking system|SE1551353A| SE539456C2|2015-10-21|2015-10-21|Debarking system|
    [返回顶部]