Wood branch and chip screening line

Abstract

The application discloses a wood branch and twig chipping and screening pipeline, a first conveying belt conveys wood chips and fine chips output by a chipping machine to a screening groove, the inner bore of a rolling screen shell is a horizontal cylindrical cavity, the wood chips output by the screening groove are suitable to be guided to the inner bore of the rolling screen shell, the inner peripheral wall of the rolling screen shell is sequentially provided with a wood chip screening area and a impurity discharging port in the circumferential direction, the wood chip screening area corresponds to the lower end of the inner bore of the rolling screen shell, the wood chip screening area is provided with a plurality of wood chip screening holes, and a plurality of wood chips are arranged on the rotor in the circumferential direction, the wood chips are suitable to be swept along the cylindrical surface of the inner bore of the rolling screen shell. Compared with the prior art, the wood chips and bark chips obtained by chipping the secondary small fuel material, branch material and wood processing "three remaining materials" are screened, the wood chips obtained by chipping the secondary small fuel material, branch material and wood processing "three remaining materials" can be practically applied to a wood chip fluffer and a flakeboard, forest resources can be more fully utilized, and in addition, other wood factories are encouraged to sell the waste obtained by chipping the secondary small fuel material, branch material and wood processing "three remaining materials" as valuable products.

Description

TECHNICAL FIELD

[0001] The present application relates to the application of small wood, in particular to a wood branch chip screening pipeline. BACKGROUND

[0002] In practice, small wood, branch wood and wood processing "three leftovers" are small logs, which are flexible and difficult to be directly planed by a shavings machine. In addition, small wood has a higher bark waste ratio than large wood, and the wood chips produced by small wood processing also have a relatively high proportion. The mixing of bark chips and / or wood powder chips affects the strength and quality of the shaving board to some extent.

[0003] Therefore, it is necessary to study a wood branch chip screening pipeline to substantially apply small wood, branch wood and wood processing "three leftovers" to shaving board. SUMMARY

[0004] The present application aims to at least solve one of the above-mentioned technical problems, and provides a wood branch chip screening pipeline, which can screen the wood chips and bark chips obtained by cutting small wood, branch wood and wood processing "three leftovers", and facilitate the substantial application of wood chips obtained by cutting small wood, branch wood and wood processing "three leftovers" to wood chip planing machines and shaving boards.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A wood branch chip screening pipeline, comprising a chipper, a first conveying belt, a vibrating screen mechanism and a rolling screen mechanism, one end of the first conveying belt is adapted to receive the wood chips and fine chips output by the chipper, the vibrating screen mechanism comprises a screen groove, a collection structure arranged below the screen groove, a vibrating shaft with an eccentric block, and a vibrating motor drivingly connected to the vibrating shaft, the screen groove is provided with elastic mounting feet, the screen groove is adapted to receive the wood chips and fine chips output by the first conveying belt, the rolling screen mechanism comprises a rolling screen shell, a rotor and a rolling screen motor drivingly connected to the rotor, the inner bore of the rolling screen shell is a horizontal cylindrical cavity, the inner peripheral wall of the rolling screen shell is sequentially provided with a wood chip screening area and a foreign matter discharge port in the circumferential direction, and the wood chip screening area corresponds to the lower end of the inner bore of the rolling screen shell, the wood chip screening area is distributed with a plurality of wood chip screening holes, the wood chips output by the screen groove are adapted to be guided to the inner bore of the rolling screen shell, and the rotor is provided with a plurality of paddles spaced apart in the circumferential direction, the paddles are adapted to sweep the inner peripheral wall of the rolling screen shell along the circumferential direction of the rolling screen shell.

[0007] Compared with the prior art, the application has the advantages that the bark and wood chips are screened out by the vibrating screen mechanism, so that the fine chips are prevented from mixing with the qualified wood chips in the drum screen, and the clean wood chips can be efficiently and high-quality shaved by the wood shaving machine, the strength and quality of the shaving board are effectively ensured, the wood chips obtained by cutting the small firewood, branch wood and wood processing "three leftovers" are substantially applied to the shaving board, the forest resources are more fully utilized, in addition, the other wood factories are encouraged to sell the waste obtained by cutting the small firewood, branch wood and wood processing "three leftovers" as treasure, the waste treatment cost of the wood factory is reduced, and even certain income is recovered.

[0008] As an improvement of the above technical solution, the second conveying belt and the air separation and heavy impurity removing mechanism are further included, one end of the second conveying belt is adapted to receive the wood chips in the warehouse, and the other end is adapted to drop the wood chips into the middle part of the first conveying belt, the air separation and heavy impurity removing mechanism includes a first throwing plate, a first backflow plate and a blower, the sieve groove is adapted to cascade the wood chips to the upper end of the first throwing plate, the blower is adapted to blow air towards the wood chips flowing out of the lower end of the first throwing plate, so that the wood chips flow into the upper end of the first backflow plate, and the heavy impurities in the wood chips fly over the first backflow plate, and the first backflow plate is adapted to guide the wood chips into the inner bore of the drum screen shell.

[0009] As an improvement of the above technical solution, the dust suction mechanism is further included, and the input end of the dust suction mechanism is covered above the sieve groove and the air separation and heavy impurity removing mechanism.

[0010] As an improvement of the above technical solution, the wood chip screening area includes a plurality of sieve hole groups arranged in sequence along the circumference of the drum screen shell, and the wood chip screening holes of adjacent two sieve hole groups are distributed in a staggered manner.

[0011] As an improvement of the above technical solution, the end part of the paddle in the axial direction is connected to the rotating shaft of the rotor, the height of the paddle is 10-15 cm, and when the paddle sweeps the low position of the inner bore of the drum screen shell, the upper part of the paddle is adapted to separate the excess wood chips.

[0012] As an improvement of the above technical solution, the rotor includes a rolling cage and the paddle protruding from the outer peripheral wall of the rolling cage, a plurality of flow-through holes are distributed in a spaced manner along the circumference of the rolling cage, the air separation and heavy impurity removing mechanism is adapted to guide the wood chips into the inner bore of the rolling cage, the gap between the outer wall of the rolling cage and the inner wall of the drum screen shell is adapted to be the sweeping path of the paddle, and the flow-through holes are adapted to supplement the wood chips to the sweeping path.

[0013] As the improvement of the above technical scheme, the drum screen shell comprises a main shell and an end cover hinged to the main shell, the air separation and heavy impurity removing mechanism is arranged on the end cover, a baffle is protruded from the inner side of the end cover, the baffle is located above the wood chip screening and sorting area, the vertical projection of the lower end of the baffle divides the wood chip screening and sorting area into a first area and a second area, the first area and the second area are arranged in sequence along the circumference of the drum screen shell, the distance between the lower end of the baffle and the inner wall of the rotor is less than 15 cm, and the air separation and heavy impurity removing mechanism is adapted to introduce wood chips towards the first area.

[0014] As the improvement of the above technical scheme, the air separation and heavy impurity removing mechanism further comprises a second throwing plate and a second backflow plate, the lower end of the first backflow plate is adapted to flow wood chips to the upper end of the second throwing plate, the air blower is further adapted to blow air towards the wood chips flowing out of the lower end of the second throwing plate, so that the wood chips flow into the upper end of the second backflow plate, and the heavy impurities in the wood chips fly over the second backflow plate, and the lower end of the second backflow plate is adapted to flow wood chips into the inner bore of the drum screen shell.

[0015] As the improvement of the above technical scheme, the inner bore of the drum screen shell is sequentially provided with a screening area, the wood chip screening and sorting area and the heavy impurity discharging port along the circumference, the air separation and heavy impurity removing mechanism is adapted to flow wood chips into the screening area, and the screening area is provided with a plurality of fine chip screening holes.

[0016] As the improvement of the above technical scheme, the pusher is inclined relative to the cross-section of the rotor shaft, so that during rotation of the rotor, the distal end of the pusher lags behind the proximal end of the pusher. BRIEF DESCRIPTION OF DRAWINGS

[0017] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which:

[0018] Figure 1 Fig. 1 is a structural schematic view of a wood branch and twig chip screening and sorting assembly according to an embodiment of the present application;

[0019] Figure 2 Fig. 2 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a perspective view of the structure; Figure 1 Fig. 3 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a perspective view of the structure from another angle;

[0020] Figure 3 Fig. 4 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a perspective view of the structure from another angle; Figure 2 Fig. 5 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a perspective view of the structure from another angle;

[0021] Figure 4 Fig. 6 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a perspective view of the structure from another angle; Figure 2 Fig. 7 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a schematic view of the structure when the drum screen shell is opened;

[0022] Figure 5 Fig. 8 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a side view of the structure; Figure 2 Fig. 9 is a structural schematic view of the wood branch and twig chip screening and sorting assembly according to the embodiment of the present application, showing a side view of the structure;

[0023] Figure 6 For Figure 2 showing the front view angle cross-sectional view of the rolling screen mechanism;

[0024] Figure 7 For Figure 4 showing the main shell structure schematic diagram of the rolling screen shell;

[0025] Figure 8 For Figure 4 showing another perspective view structure schematic diagram of the rotor;

[0026] Figure 9 For Figure 4 showing the structure schematic diagram of the end cover and the air separation mechanism.

[0027] The drawings are only one of the specific embodiments of the present application, and the form and structure of the specific embodiment should not limit the widening of other embodiments.

[0028] The first transmission belt 110, the second transmission belt 120;

[0029] The vibrating screen mechanism 200, the sieve groove 210, the elastic mounting foot 211, the vibration driving shaft 220, the vibration driving motor 230;

[0030] The air separation mechanism 300, the first material throwing inclined plate 310, the first backflow inclined plate 320, the air blower 330, the second material throwing inclined plate 340, the second backflow inclined plate 350;

[0031] The rolling screen mechanism 400, the rolling screen shell 410, the main shell 411, the sieve debris area 411a, the wood chip sieve sorting area 411b, the impurity discharge port 411c, the end cover 412, the baffle 412a, the rotor 420, the paddle 421, the rolling cage 422, the flow-through hole 422a. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0033] Referring to Figures 1 to 6The wood branch slicing and screening pipeline comprises a slicing machine, a first conveying belt 110, a vibrating screening mechanism 200 and a rolling screening mechanism 400, one end of the first conveying belt 110 is adapted to receive the wood chips and fine chips output by the slicing machine, the vibrating screening mechanism 200 comprises a screening groove 210, a collecting structure arranged below the screening groove 210, a vibration driving shaft 220 with an eccentric block and a vibration driving motor 230 connected with the vibration driving shaft 220, the screening groove 210 is provided with elastic mounting feet 211, and the screening groove 210 is adapted to receive the wood chips and fine chips output by the first conveying belt 110, the rolling screening mechanism 400 comprises a rolling screening shell 410, a rotor 420 and a rolling screening motor connected with the rotor 420, the inner cavity of the rolling screening shell 410 is a horizontal cylindrical cavity, the inner peripheral wall of the rolling screening shell 410 is sequentially provided with a wood chip screening area 411b and a foreign matter discharging port 411c in the circumferential direction, the wood chip screening area 411b corresponds to the lower end of the inner cavity of the rolling screening shell 410, the wood chip screening area 411b is provided with a plurality of wood chip screening holes, the wood chips output by the screening groove 210 are adapted to be guided into the inner cavity of the rolling screening shell 410, and the rotor 420 is provided with a plurality of wood chip pushing plates 421 in the circumferential direction, and the wood chip pushing plates 421 are adapted to push and sweep the inner peripheral wall of the rolling screening shell 410 along the circumferential direction of the rolling screening shell 410.

[0034] The main structure of the slicing machine comprises a casing and a knife roller accommodated in the casing, a plurality of blades are distributed on the circumferential wall of the knife roller in a staggered manner, which is a common knowledge; in practice, small firewood, branch materials and wood processing “three leftovers” are sliced by a wood factory, and the wood chips and fine chips obtained by slicing are incinerated or discarded; the length of the wood chips produced by the slicing machine is generally 5-9 cm, the width is generally 2-6 cm, and the thickness is generally 0.5-2 cm, the present application can screen and sort the wood chips and fine chips, and the slicing machine, the vibrating screening mechanism and the wood chip fluffer are combined, so that the small firewood and the like are practically applied to the existing wood chip fluffer. Figure 1 The slicing machine gradually flows the wood chips into the screening groove 210 through the first conveying belt 110 (referring to the direction V 11 ); the vibration driving motor 230 drives the vibration driving shaft 220 to rotate, because the screening groove 210 is mounted through the elastic mounting feet 211, the vibration driving shaft 220 drives the screening groove 210 to vibrate based on the centrifugal tendency of the eccentric block, the screening groove 210 throws and vibrates the wood chips upward, and the bark chips and wood chips can pass through the screening holes of the screening groove 210 to separate from the wood chips (that is, the bark chips and wood chips lose the pushing force of vibration corresponding to the screening holes); among the wood chips introduced into the inner cavity of the rolling screening shell 410, part of the qualified wood chips is directly sorted out through the wood chip screening holes, and part of the qualified wood chips is pushed and swept into the wood chip screening holes (referring to the direction V 23 ); in the process of sweeping by each wood chip pushing plate 421 at the lower end of the inner cavity of the rolling screening shell 410, the qualified wood chips are gradually sorted out and separated from the wood chip pushing plate 421, the remaining large-size wood chips are pushed to the foreign matter discharging port 411c through the wood chip pushing plate 421, and the large-size wood chips are separated from the rolling screening mechanism 400 through the foreign matter discharging port 411c (referring to the direction V 24 ).

[0035] The length and width of the wood chip screening hole is generally 7-10 cm; the impurity discharging port 411c is 1.5 times larger than the wood chip screening hole. It can be understood that the wood chip introduction rate into the inner cavity of the rolling sieve shell 410 is controlled to avoid too many wood chips from being stuck in the inner cavity of the rolling sieve shell 410; preferably, after the wood chips are introduced into the inner cavity of the rolling sieve shell 410, 1-4 layers of wood chips are spread in the inner cavity of the rolling sieve shell 410, and the temporary storage amount of the wood chips in the inner cavity of the rolling sieve shell 410 cannot exceed the impurity discharging port 411c.

[0036] It can be understood that the sieve tank 210 is connected to the floor, floor, or ground support through the elastic mounting foot 211, the motor can be an electric motor, a hydraulic motor or a pneumatic motor, and the sieve hole at the bottom of the sieve tank 210 is set to a predetermined size according to the size of the bark chips and wood chips. The collection structure can be a hopper or a conveyor belt.

[0037] Referring to Figure 3 , Figure 5 and Figure 7 , the rotor 420 is connected with a belt pulley, and the belt pulley is suitable for being connected with the rolling sieve motor through a belt drive; the rotor 420 and the rolling sieve motor can also be chain transmission or the like.

[0038] The vibration motor 230 is generally connected with the vibration shaft 220 through a plurality of fiber belts or torsion blocks, and in the rotation of the vibration shaft 220, the tangent direction of the upper side thereof is toward the output end of the sieve tank 210.

[0039] Compared with the prior art, the beneficial effects of the present application include: the bark chips and wood chips are screened out through the vibrating sieve mechanism 200, so that fine chips are prevented from being mixed with qualified wood chips in the rolling sieve, clean wood chips can be efficiently and high-quality shaved by a wood chip shaver, the strength and quality of the obtained clean shaving are effectively guaranteed, the wood chips obtained from the shaving of small firewood, branch material and wood processing "three leftovers" are substantially applied to shaving board, forest resources are more fully utilized, in addition, other wood factories are encouraged to sell the waste from the shaving of small firewood, branch material and wood processing "three leftovers" as treasure, the waste treatment cost of the wood factory is reduced, and even certain income is recovered.

[0040] Referring to Figure 1 , in some embodiments of the present application, a second conveying belt 120 and a winnowing and de-dusting mechanism 300 are further included, one end of the second conveying belt 120 is suitable for receiving wood chips from a warehouse, and the other end is suitable for dropping wood chips into the middle part of the first conveying belt 110, the winnowing and de-dusting mechanism 300 includes a first material throwing inclined plate 310, a first backflow inclined plate 320 and a blower 330, the sieve tank 210 is suitable for cascading wood chips to the upper end of the first material throwing inclined plate 310, the blower 330 is suitable for blowing air toward the wood chips flowing out of the lower end of the first material throwing inclined plate 310, so that the wood chips flow into the upper end of the first backflow inclined plate 320, and heavy impurities in the wood chips fly over the first backflow inclined plate 320, and the first backflow inclined plate 320 is suitable for guiding the wood chips into the inner cavity of the rolling sieve shell 410.

[0041] In the present application, the purchased wood chips in the warehouse gradually flow into the wood chips through the first conveying belt 110 and the second conveying belt 120; the sieve groove 210 is shaken, and the output end of the sieve groove 210 outputs the wood chips in the form of intermittent cascading water flow, the upper end of the first throwing plate 310 receives the wood chips, and the lower end of the first throwing plate 310 throws the wood chips in the form of intermittent cascading water flow (see direction V 12 ), each wood chip falls in the form of a cascading water flow, the air blower 330 blows air towards the cascading water flow, the wood chips in the cascading water flow are blocked and flow into the upper end of the first return plate 320, and the heavy impurities in the cascading water flow are less affected, the heavy impurities are separated from the cascading water flow and fly over the first return plate 320, and the heavy impurities are filtered out (see direction V 21 ), the heavy impurities in the air separation are usually wet heavy wood chip blocks, sand, iron nails, wood stick cuttings / short wood sticks, etc., because the air blower 330 blows air towards the cascading water flow, a small amount of tree bark and wood chips that may be left on the wood chips are lifted upwards and separated.

[0042] The fine dust is filtered out by the sieve mechanism 200 and the heavy impurity removal mechanism 300, so that the fine dust is prevented from mixing with qualified wood chips in the rolling sieve; the sieve groove 210 outputs the wood chips in the form of intermittent cascading water flow to the heavy impurity removal mechanism 300, the heavy impurity removal mechanism 300 sufficiently filters out heavy impurities such as wet heavy wood chip blocks, sand, iron nails, wood stick cuttings / short wood sticks, effectively protects the shaving blade, and efficiently and effectively shaves the wood chips; large-size wood chips are separated by the rolling sieve, and the large-size wood chips can be recycled and used for chip utilization; waste wood obtained by cutting small wood, branch wood and wood processing “three leftovers” can be effectively picked, so that the small wood, branch wood and wood processing “three leftovers” are substantially applied to the shaving board, and forest resources are more fully utilized.

[0043] Some of the purchased wood chips even contain mineral water bottles, and the large-size wood chips and mineral water bottles are synchronously discharged in the rolling sieve mechanism 400.

[0044] In some embodiments of the present application, a dust suction mechanism is further included, and the input end of the dust suction mechanism is covered above the sieve groove 210 and the heavy impurity removal mechanism 300. Specifically, the dust suction mechanism can be provided with a wind discharge cloth bag, a felt filter piece, or a spray dust reduction structure at the end thereof.

[0045] In actual use, the wood chips introduced into the inner cavity of the rolling sieve shell 410 fall to an indefinite position. Referring to Figure 7 In some embodiments of the present application, the wood chip screening area 411b includes a plurality of sieve hole groups arranged in sequence along the circumference of the rolling sieve shell 410, and the wood chip screening holes of adjacent two sieve hole groups are distributed in a staggered manner. Each wood chip at the indefinite position is pushed by the wood chip pushing piece 421 and separated from the rolling sieve shell 410 through the odd-numbered sieve hole group or the even-numbered sieve hole group, and the staggered distribution of the sieve holes facilitates the rapid movement of the wood chips to the corresponding wood chip screening holes.

[0046] Referring to Figure 4 and Figure 9 In some embodiments of the present application, the drum sieve shell 410 comprises a main shell 411 and an end cover 412 hinged to the main shell 411, and the air separation and heavy object removing mechanism 300 is arranged on the end cover 412. In the present application, the air separation and heavy object removing mechanism 300 can quickly leave the main body of the drum sieve mechanism 400, and the inner cavity of the drum sieve shell 410 and the rotor 420 can be quickly maintained after the end cover 412 is opened.

[0047] In some embodiments of the present application, the paddle 421 is connected to the rotating shaft of the rotor 420 through the end portion in the axial direction, the height of the paddle 421 is 10-15 cm, and 1-4 layers of wood chips are temporarily stored at the low position of the inner cavity of the drum sieve shell 410. When the paddle 421 sweeps the low position of the inner cavity of the drum sieve shell 410, the upper portion of the paddle 421 is suitable for the separation of excess wood chips.

[0048] Referring to Figures 4 to 6 and Figure 8 In some embodiments of the present application, the rotor 420 comprises a drum cage 422 and a paddle 421 protruding from the peripheral wall of the drum cage 422, a plurality of flow-through holes 422a are distributed at intervals in the circumferential direction along the peripheral wall of the drum cage 422, the air separation and heavy object removing mechanism 300 is suitable for introducing wood chips into the inner cavity of the drum cage 422, the gap between the outer wall of the drum cage 422 and the inner wall of the drum sieve shell 410 is suitable for the sweeping path of the paddle 421, and the flow-through holes 422a are suitable for the replenishment of wood chips to the sweeping path. In the present application, wood chips are temporarily stored in the inner cavity of the drum cage 422, and the amount of wood chips stored in the sweeping path is suitable for the workload of the paddle 421 in a single sweeping operation.

[0049] Referring to Figure 4 and Figure 6 In some embodiments of the present application, the inner side of the end cover 412 protrudes a baffle 412a, the baffle 412a is located above the wood chip screening and picking area 411b, the vertical projection of the lower end edge of the baffle 412a divides the wood chip screening and picking area 411b into a first area and a second area, the first area and the second area are arranged in sequence along the circumferential direction of the drum sieve shell 410, the distance between the lower end of the baffle 412a and the inner wall of the rotor 420 is less than 15 cm, and the air separation and heavy object removing mechanism 300 is suitable for introducing wood chips towards the interval where the first area is located. In some cases, the air separation and heavy object removing mechanism 300 introduces more wood chips towards the interval where the first area is located, the first area has a lower wood chip picking rate based on the wood chip screening holes, and temporarily stores a certain amount of wood chips, and the second area temporarily stores a suitable amount of wood chips under the scraping of the baffle 412a.

[0050] Referring to Figure 5In some embodiments of the present application, the first return chute 320 directly introduces the wood chips into the inner chamber of the drum sieve shell 410. In some embodiments of the present application, the air separation and heavy impurity removing mechanism 300 further comprises a second throwing chute 340 and a second return chute 350, the lower end of the first return chute 320 is adapted to flow the wood chips into the upper end of the second throwing chute 340, the air blower 330 is further adapted to blow air toward the wood chips flowing out of the lower end of the second throwing chute 340, so that the wood chips flow into the upper end of the second return chute 350, and the heavy impurities in the wood chips fly over the second return chute 350, and the lower end of the second return chute 350 is adapted to flow the wood chips into the inner chamber of the drum sieve shell 410. In the present application, after the first return chute separates all or part of the heavy impurities, the waterfall flow is relatively thin, and the second return chute is used to separate the possible remaining heavy impurities; the air blown by the first return chute is mainly used for heavy impurity removal and dust removal, and the air blown by the second return chute is mainly used for heavy impurity removal and air blowing into the drum sieve shell 410.

[0051] Referring to Figure 6 and Figure 7 In some embodiments of the present application, the inner chamber of the drum sieve shell 410 is sequentially provided with a fine chip area 411a, a wood chip screening area 411b and a heavy impurity discharge port 411c in the circumferential direction, and the air separation and heavy impurity removing mechanism 300 is adapted to flow the wood chips into the fine chip area 411a. The fine chip area 411a is provided with a plurality of fine chip sieve holes, which facilitates the wood chips to fall and shake off the last dust adhered thereto. In the vibrating sieve mechanism 200, a small amount of stubborn dust that may remain on the wood chips remains adhered, and after weathering and falling, the dust is more easily shaken off.

[0052] Referring to Figure 6 In some embodiments of the present application, the paddle 421 is inclined relative to the cross-sectional plane passing through the shaft of the rotor 420, so that during rotation of the rotor 420, the distal end of the paddle 421 lags behind the proximal end of the paddle 421. Referring to Figure 6 , the direction of rotation W of the rotor 420, the paddle 421 is inclined and disposed such that the diameter line of the drum sieve shell 410 is out of the plane of the paddle 421. The paddle 421 is inclined and disposed, and the paddle 421 performs sweeping in a pressing manner, which facilitates the wood chips to better flow to the wood chip screening holes; and when the paddle 421 reaches the heavy impurity discharge port 411c, the paddle 421 is more upright, which facilitates the paddle 421 to guide the large-size wood chips into the heavy impurity discharge port 411c.

[0053] Referring to Figure 5 and Figure 8 In some embodiments of the present application, the rotor 420 is provided with a cantilever shaft, the cantilever shaft extends outward from the inner side of the drum sieve shell 410, the root end of the cantilever shaft is connected to the inner side of the drum sieve shell 410 through a first rolling bearing, the outer end of the cantilever shaft is connected to the outer side of the drum sieve shell 410 through a second rolling bearing, and the cantilever shaft is threadedly connected with a locking nut adapted to press the second rolling bearing, so that the first rolling bearing and the second rolling bearing jointly clamp the drum sieve shell 410.

[0054] The above examples are only used to illustrate the technical solutions of the present application and not to limit it, and any modification or equivalent replacement within the spirit and range of the present application should be covered in the scope of the technical solutions of the present application.

Claims

1. A wood shoot sliver screening line, characterized in that, It comprises: a chipper; a first conveying belt, one end of which is adapted to receive wood chips and fines output by the chipper; a vibrating screen mechanism, which comprises a screen tank, a collecting structure arranged below the screen tank, a vibrating shaft with an eccentric block, and a vibrating motor connected to the vibrating shaft, the screen tank is provided with elastic mounting feet, and the screen tank is adapted to receive wood chips and fines output by the first conveying belt; a rolling screen mechanism, which comprises a rolling screen shell, a rotor, and a rolling screen motor connected to the rotor, the inner cavity of the rolling screen shell is a horizontal cylindrical cavity, the inner peripheral wall of the rolling screen shell is sequentially provided with a wood chip screening area and a foreign matter discharge port in the circumferential direction, the wood chip screening area corresponds to the lower end of the inner cavity of the rolling screen shell, the wood chip screening area is provided with a plurality of wood chip screening holes, the wood chips output by the screen tank are adapted to be guided to the inner cavity of the rolling screen shell, the rotor is provided with a plurality of paddles spaced apart in the circumferential direction, the paddles are adapted to sweep the inner peripheral wall of the rolling screen shell along the circumferential direction of the rolling screen shell, the inner cavity of the rolling screen shell is sequentially provided with a screening area, the wood chip screening area and the foreign matter discharge port in the circumferential direction, the screening area is provided with a plurality of fine screening holes, and the rotor comprises a rolling cage and the paddles protruding from the outer peripheral wall of the rolling cage, the peripheral wall of the rolling cage is spaced apart in the circumferential direction and is provided with a plurality of flow-through holes; a winnowing and heavy impurity removing mechanism, which comprises a first throwing inclined plate, a first backflow inclined plate, a blower, a second throwing inclined plate and a second backflow inclined plate, the screen tank is adapted to flow wood chips to the upper end of the first throwing inclined plate, the blower is adapted to blow air towards the wood chips flowing out of the lower end of the first throwing inclined plate, so that the wood chips flow into the upper end of the first backflow inclined plate, and heavy impurities in the wood chips fly over the first backflow inclined plate, the lower end of the first backflow inclined plate is adapted to flow wood chips to the upper end of the second throwing inclined plate, and the blower is also adapted to blow air towards the wood chips flowing out of the lower end of the second throwing inclined plate, so that the wood chips flow into the upper end of the second backflow inclined plate, and heavy impurities in the wood chips fly over the second backflow inclined plate; wherein the lower end of the second backflow inclined plate is adapted to guide wood chips into the area corresponding to the screening area in the inner cavity of the rolling cage, the gap between the outer wall of the rolling cage and the inner wall of the rolling screen shell is adapted to be the sweeping path of the paddles, and the flow-through holes are adapted to supplement wood chips to the sweeping path.

2. The wood shoot sliver screening line according to claim 1, characterized in that, It further comprises a second conveying belt, one end of the second conveying belt is adapted to receive wood chips in a warehouse, and the other end is adapted to drop wood chips into the middle part of the first conveying belt.

3. The wood shoot sliver screening line according to claim 2, characterized in that, It further comprises a dust suction mechanism, the input end of the dust suction mechanism is covered above the screen tank and the winnowing and heavy impurity removing mechanism.

4. The wood shoot sliver screening line of claim 2, wherein, The wood chip screening area comprises a plurality of screen hole groups arranged in the circumferential direction of the rolling screen shell, and the wood chip screening holes of adjacent two screen hole groups are distributed in a staggered manner.

5. The wood shoot sliver screening line according to any of claims 2 to 4, characterized in that, The roll screen shell comprises a main shell and an end cover hinged to the main shell, the air separation and heavy material removing mechanism is arranged on the end cover, the inner side of the end cover protrudes a baffle, the baffle is located above the wood chip screening area, the vertical projection of the lower end edge of the baffle divides the wood chip screening area into a first area and a second area, the first area and the second area are arranged in sequence along the circumference of the roll screen shell, the distance between the lower end of the baffle and the inner wall of the rotor is less than 15 cm, and the air separation and heavy material removing mechanism is suitable for introducing wood chips towards the area where the first area is located.

6. The wood shoot sliver screening line according to any of claims 1 to 4, characterized in that, The cross-axis section of the pusher relative to the rotor is inclined, so that during rotation of the rotor, the far-end of the pusher lags behind the near-end of the pusher.

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