A wood chip dryer with uniform drying

Abstract

The present application provides a wood chip dryer with uniform drying, which grinds wood chip clumps by using the rotating friction between the first spiral roll and the second spiral roll, scatters the wood chips by the spiral blades after the wood chips fall onto the supporting plate, slows down the falling speed of the wood chips by the shaking net and the vibrating net when discharging, and scatters the wood chips to further radiate heat, the gear and the rack drive the rotating shaft to reciprocate, and then drive the first spiral roll, the second spiral roll and the spiral blades to reciprocate, and the linkage mechanism links the movement components; the above technical scheme improves the dispersion degree of the wood chips entering the drum, effectively improves the uniformity and drying effect of the wood chip dryer on the wood chips, effectively speeds up the heat dissipation effect of the discharged wood chips, and effectively reduces the probability of re-clumping and even mold of the discharged wood chips when stacking.

Description

Technical Field

[0001] This invention relates to the field of wood chip drying equipment, and more specifically to a wood chip dryer that provides uniform drying. Background Technology

[0002] A wood chip dryer is a device specifically designed for drying wood chips. It is widely used in the wood processing industry, biomass energy sector, and wood chip product manufacturing. The main function of a wood chip dryer is to evaporate the moisture from the wood chips through a heating and ventilation system, thereby achieving a drying effect.

[0003] Currently, most large-scale wood chip dryers use a drum-type drying method. After the wood chips enter the drum, the power is turned on, the drum rotates, and a steam pump or hot air pump supplies hot air into the drum to dry the wood chips. However, in actual use, clumping and sticking occur during the pre-drying accumulation process. Because the wood chips are relatively light, they cannot be fully broken up during drum rotation, resulting in uneven heating, and the clumps are difficult to break up during rotation. Furthermore, when discharging the dried wood chips, typical drum dryers only reduce the moisture content from 60% to around 20%. Due to the still relatively high residual temperature, the chips are prone to re-dampening, clumping, and even mold growth after being piled up, affecting subsequent use. Spreading them out for complete drying requires a large area. Therefore, heat dissipation is necessary during discharge.

[0004] Chinese invention patent application number CN201911147253.0 includes a jacket, a sleeve, a motor, and a drum. The jacket covers the outer surface of the sleeve and has a heat medium inlet and a heat medium outlet. The sleeve is fitted onto the outer surface of the drum, which has a feed inlet and a discharge outlet. The motor is mounted on the sleeve and drives the drum to rotate inside the sleeve. The drum contains heat storage balls and wood dust to be dried. Both the wood dust and the heat storage balls enter the drum through the feed inlet and are discharged out through the discharge outlet. This solves the problem of excessive dust during the drying process. However, the use of drum rotation for drying still cannot solve the problem of uniform drying of wood dust. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the above-mentioned technologies by proposing a wood chip dryer that provides uniform drying, thereby solving the problems of uneven drying caused by clumping of wood chips after feeding and re-clumping and mold growth due to residual heat after discharge.

[0006] This invention provides a wood chip dryer for uniform drying, comprising a frame, a feed hopper, a discharge hopper, and a drum. The feed hopper and discharge hopper are rotatably connected to both ends of the drum, respectively. The feed hopper and discharge hopper are fixed to the frame, and the drum is rotatably mounted on the frame. A grinding mechanism for crushing agglomerated wood chips is installed inside the feed hopper. Below the grinding mechanism is a dispersing mechanism for breaking up the wood chips, ensuring uniform drying within the drum. The grinding mechanism and the dispersing mechanism are connected by a rotating shaft, which is fixedly connected to a reciprocating mechanism for reciprocating rotation. A heat dissipation mechanism for cooling the wood chips is installed inside the discharge hopper, and this mechanism is movably connected to the reciprocating mechanism via a linkage mechanism. By installing the grinding and dispersing mechanisms at the feed inlet, the uniformity of the wood chips within the drum is effectively improved, promoting uniform drying. The heat dissipation mechanism in the discharge hopper effectively reduces the temperature of the discharged wood chips, decreasing the probability of clumping and mold growth due to moisture absorption.

[0007] Preferably, the grinding mechanism includes a first spiral coil and a second spiral coil. The edge side of the first spiral coil is fixedly connected to the inner wall of the feed hopper, and the center side of the first spiral coil is rotatably connected to a rotating shaft. The edge side of the second spiral coil is in sliding contact with the inner wall of the feed hopper, and the center side of the second spiral coil is fixedly connected to the rotating shaft. The first and second spiral coils are congruent, and the center side of the second spiral coil is in contact with the center side of the first spiral coil. The agglomerated wood chips are ground apart by the squeezing and friction between the first and second spiral coils.

[0008] Preferably, the dispersing mechanism includes a spiral blade, a counterweight, and a support plate. The counterweight is fixedly connected to one end of the spiral blade, and the other end of the spiral blade is fixedly connected to a rotating shaft. The center of the support plate is fixedly connected to the rotating shaft, and the spiral blade and the counterweight move on the upper surface of the support plate. Wood chips ground by the grinding mechanism may accumulate and require further dispersing. The dispersing mechanism effectively disperses the wood chips and sweeps them into the drum, effectively improving the uniformity of wood chip drying.

[0009] Preferably, the reciprocating mechanism includes a motor, a first driving rod, a first driven rod, a connecting block, a rack, and a gear. The motor is fixed inside the feed hopper. One end of the first driving rod is fixedly connected to the output section of the motor, and the other end of the first driving rod is rotatably connected to one end of the first driven rod. The other end of the first driven rod is hinged to the connecting block, which is fixedly connected to the middle of the rack. The rack meshes with the gear, and the center of the gear is fixedly connected to the center of the rotating shaft. The reciprocating mechanism causes the first spiral coil, the second spiral coil, and the spiral blade to rotate.

[0010] Preferably, the heat dissipation mechanism includes a swaying mesh, a rotating rod, a swinging rod, an arc-shaped plate, an arc-shaped block, a protrusion, a vibrating mesh, a telescopic rod, a spring, and a fixing ring. Both ends of the rotating rod are rotatably connected to the inner wall of the discharge hopper. The swaying mesh is fixedly connected to the rotating rod. The swinging rod passes through and is perpendicular to the rotating rod. One end of the swinging rod is fixedly connected to the arc-shaped plate, and the other end points away from the discharge hopper opening. The arc-shaped block is fixedly connected to the arc-shaped plate on the side away from the swinging rod. The protrusion is fixedly connected to the swaying mesh and contacts the arc-shaped block. The fixing ring is fixed to the inner wall of the discharge hopper. One end of the telescopic rod is fixedly connected to the vibrating mesh, and the other end is fixed to the fixing ring. The spring is sleeved on the outer wall of the telescopic rod. The end of the discharge hopper consists of several long rods, and the edge of the fixing ring is fixedly connected to the long rods.

[0011] Preferably, the linkage mechanism includes a second driving rod and a second driven rod. One end of the second driving rod is fixedly connected to the output end of the motor, and the other end of the second driving rod is rotatably connected to one end of the second driven rod. The other end of the second driven rod is hinged to the swing rod. The linkage mechanism also includes a limiting rod and a limiting ring. The second driven rod passes through the limiting ring, one end of the limiting rod is fixed to the top wall of the feed hopper, and the other end of the limiting rod is fixedly connected to the limiting ring. By setting up the linkage mechanism, the grinding mechanism, the dispersing mechanism, and the heat dissipation mechanism can move in unison, making full use of the power unit and improving the overall integrity of the device.

[0012] Preferably, the gears and racks are fitted with protective sleeves, which are fixed to the inner wall of the feed hopper.

[0013] Compared with existing technologies, it has the following beneficial effects:

[0014] This invention provides a wood chip dryer for uniform drying. It utilizes the rotational friction between a first and second spiral coil to grind agglomerated wood chips. After falling onto a support plate, the wood chips are broken up by spiral blades. During discharge, a shaking and vibrating screen slows the falling speed of the wood chips and simultaneously breaks them up for further heat dissipation. The engagement of gears and racks drives the rotating shaft to reciprocate, which in turn drives the first and second spiral coils and spiral blades to reciprocate. A linkage mechanism connects all moving parts. Using the above technical solution...

[0015] 1. Improve the dispersion of wood chips entering the drum, effectively enhancing the uniformity and drying effect of the wood chip dryer;

[0016] 2. Effectively accelerates heat dissipation after sawdust is discharged, effectively reducing the probability of sawdust clumping again or even becoming moldy when piled up after discharge. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a wood chip dryer that provides uniform drying according to the present invention;

[0019] Figure 2 This is a schematic diagram of the grinding mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the grinding mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the dispersing mechanism of the present invention;

[0022] Figure 5 This is a schematic diagram of the reciprocating mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the heat dissipation mechanism of the present invention;

[0024] Figure 7 This is a schematic diagram of the heat dissipation mechanism of the present invention;

[0025] Figure 8 This is a schematic diagram of the linkage mechanism of the present invention;

[0026] Figure 9 This is a schematic diagram of the linkage mechanism and protective sleeve of the present invention.

[0027] In the diagram, the components are: frame-1; roller-11; feed hopper-12; rotating shaft-121; discharge hopper-13; long rod-131; grinding mechanism-2; first spiral coil-21; second spiral coil-22; dispersing mechanism-3; spiral blade-31; counterweight block-32; support plate-33; reciprocating mechanism-4; motor-41; first driving rod-42; first driven rod-43; connecting block-44; rack-45; gear-46; heat dissipation mechanism-5; shaking net-51; rotating rod-52; swing rod-53; arc plate-54; arc block-55; vibrating net-56; protrusion-561; telescopic rod-57; spring-58; fixing ring-59; linkage mechanism-6; second driving rod-61; second driven rod-62; limit rod-63; limit ring-64; and protective sleeve-7. Detailed Implementation

[0028] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0029] Example:

[0030] like Figures 1 to 9 As shown, this invention provides a wood chip dryer for uniform drying, including a frame 1, a feed hopper 12, a discharge hopper 13, and a drum 11. The feed hopper 12 and discharge hopper 13 are rotatably connected to both ends of the drum 11. A steam pump or hot air pump is typically connected to one side of the discharge hopper 13. The steam pump pumps heat into the drum 11 for drying. The tumbling action of the drum 11 ensures more uniform contact between the wood chips and the hot air, thus achieving drying. The feed hopper 12 and discharge hopper 13 are fixed to the frame 1, while the drum 11 is rotatably mounted on the frame 1. The drum 11 is typically rotated by a rotating wheel on the frame 1 in conjunction with a gear 46 on the drum body. A grinding mechanism 2 is installed inside the feed hopper 12 to crush agglomerated wood chips. Agglomeration of wood chips is often due to moisture during the accumulation process causing some chips to stick together; therefore, it is easily broken up by grinding. The grinding mechanism 2 does not need to apply excessive pressure to prevent the formation of pressure agglomerates. Below the grinding mechanism 2 is a dispersing mechanism 3 for breaking up the sawdust, ensuring uniform drying of the sawdust within the drum 11. The grinding mechanism 2 and the dispersing mechanism 3 are connected via a rotating shaft 121, which is fixedly connected to a reciprocating mechanism 4 for its reciprocating rotation. A heat dissipation mechanism 5 for cooling the sawdust is installed inside the discharge hopper, and the heat dissipation mechanism 5 is movably connected to the reciprocating mechanism 4 via a linkage mechanism 6. By installing the grinding mechanism 2 and the dispersing mechanism 3 in the feed hopper 13, the uniformity of the sawdust within the drum 11 is effectively improved, promoting uniform drying. The heat dissipation mechanism 5 in the discharge hopper 13 effectively reduces the temperature of the discharged sawdust, decreasing the probability of clumping and mold growth due to moisture absorption.

[0031] As another embodiment, such as Figure 2 and Figure 3As shown, the grinding mechanism 2 of this application includes a first spiral coil 21 and a second spiral coil 22. The first spiral coil 21 is made of a hard material, such as stainless steel or iron. The edge of the first spiral coil 21 is fixedly connected to the inner wall of the feed hopper 12, meaning the first spiral coil 21 does not move. The center of the first spiral coil 21 is rotatably connected to the rotating shaft 121. A collar is fixed to each end of the first spiral coil 21, and the collar is fitted onto the rotating shaft 121, allowing the rotating shaft 121 to rotate, but the first spiral coil 21 does not rotate. The second spiral coil 22 is made of a flexible material, such as rubber, and is thinner on the side near the rotating shaft 121 and on the side near the inner wall of the feed hopper 12. The edge of the second spiral coil 22 slides in contact with the inner wall of the feed hopper 12, and the center of the second spiral coil 22 is fixedly connected to the rotating shaft 121. The first spiral coil 21 and the second spiral coil 22 are congruent, and the center of the second spiral coil 22 contacts the center of the first spiral coil 21. When the second spiral 22 rotates around the shaft 121, it rotates within the interval of the number of rotations of the first spiral 21, but not exceeding 360 degrees. Exceeding 360 degrees will cause them to cross and collide. Therefore, the reciprocating mechanism 4 must ensure that the rotation of the shaft 121 does not exceed 360 degrees. Furthermore, considering the thickness difference between the first and second spirals 21, the optimal rotation of the shaft 121 driven by the reciprocating mechanism 4 should not exceed 300 degrees. Additionally, the second spiral 22 needs to return to its starting position at the end of each run; this control can be achieved by adjusting the running time of the reciprocating mechanism 4.

[0032] As another embodiment, such as Figures 2 to 4 As shown, the dispersing mechanism 3 of this application includes a spiral blade 31, a counterweight 32, and a support plate 33. The counterweight 32 is fixedly connected to one end of the spiral blade 31, and the other end of the spiral blade 31 is fixedly connected to a rotating shaft 121. The spiral blade 31 is made of iron or shape memory metal, and the counterweight 32 is a metal ball. The length of the spiral blade 31 is at most the radius of the support plate 33. The center of the support plate 33 is fixedly connected to the rotating shaft 121, and the spiral blade 31 and the counterweight 32 move on the upper surface of the support plate 33. The rotating shaft 121 drives the spiral blade 31 to reciprocate. During the reciprocating motion, the spiral blade 31 and the counterweight 32 generate centrifugal force, and during the reverse motion, they generate the opposite centrifugal force and the elastic force of the spiral blade 31 itself, which causes it to swing on the support plate 33 to disperse the wood chips and sweep them off the support plate 33.

[0033] As another embodiment, such as Figure 5As shown, the reciprocating mechanism 4 of this application includes a motor 41, a first driving rod 42, a first driven rod 43, a connecting block 44, a rack 45, and a gear 46. The motor 41 is fixed inside the feed hopper 12. One end of the first driving rod 42 is fixedly connected to the output section of the motor 41, and the other end of the first driving rod 42 is rotatably connected to one end of the first driven rod 43. The other end of the first driven rod 43 is hinged to the connecting block 44. The first driving rod 42 and the first driven rod 43 form a linkage structure. When the first driving rod 42 rotates, it drives the first driven rod 43 to move back and forth. Connecting block 44 is fixedly connected to the middle of rack 45. Rack 45 meshes with the teeth of gear 46. The center of gear 46 is fixedly connected to the center of rotating shaft 121. The reciprocating motion of the first driven rod 43 drives connecting block 44 to reciprocate, which in turn drives rack 45 to reciprocate. Gear 46 and rotating shaft 121 also reciprocate accordingly. The degree of rotation of gear 46 is controlled by controlling the number of teeth of rack 45 or by controlling the length of the first driven rod 43 and the first driving rod 42. Protective sleeve 7 is provided over gear 46 and rack 45. Protective sleeve 7 is fixed to the inner wall of feed hopper 12. Protective sleeve 7 is provided over gear 46 and rack 45 to prevent sawdust from entering between rack 45 and gear 46, and to stabilize the movement of rack 45 and gear 46. Rotating shaft 121 passes through gear 46 and is rotatably connected to feed hopper 12. The length of protective sleeve 7 is longer than the length of rack 45, and a groove is provided for connecting block 44 to slide on protective sleeve 7.

[0034] As another embodiment, such as Figure 6 and Figure 7As shown, the heat dissipation mechanism 5 of this application includes a shaking net 51, a rotating rod 52, a swing rod 53, an arc plate 54, an arc block 55, a protrusion 561, a vibrating net 56, a telescopic rod 57, a spring 58, and a fixing ring 59. The two ends of the rotating rod 52 are rotatably connected to the inner wall of the discharge hopper 13. The shaking net 51 is fixedly connected to the rotating rod 52. The swing rod 53 passes through and is perpendicular to the rotating rod 52. One end of the swing rod 53 is fixedly connected to the arc plate 54, and the other end of the swing rod 53 points to the side away from the discharge hopper 13. The arc block 55 is fixedly connected to the side of the arc plate 54 away from the swing rod 53. The protrusion 561 is fixedly connected to the shaking net 51, and the protrusion 561 is an arc-shaped protrusion 561. The protrusion 561 contacts the arc-shaped block 55, the fixing ring 59 is fixed to the inner wall of the discharge hopper 13, one end of the telescopic rod 57 is fixedly connected to the vibrating net 56, and the other end of the telescopic rod 57 is fixed to the fixing ring 59. The spring 58 is sleeved on the outer wall of the telescopic rod 57. The end of the discharge hopper 13 is composed of several long rods 131, and the edge of the fixing ring 59 is fixedly connected to the long rods 131. By swinging the swinging rod 53, the swaying net 51, which is rotatably connected to the rotating rod 52, is made to shake, which initially disperses the wood chips on the swaying net 51. During the shaking process, the wood chips fall onto the vibrating net 56. During the swinging process, the swinging rod 53 will drive the arc plate 54 to move. The arc-shaped block 55 on the arc plate 54 rubs against the protrusion 561 on the vibrating net 56, which will produce undulating compression. Since the vibrating net 56 and the fixing ring 59 are elastically connected, vibration will be generated when subjected to undulating compression. The vibrating net 56 can be one layer or multiple layers, and each layer is elastically connected. During vibration, the vibrating net 56 further disperses the sawdust. The shaking net 51 and vibrating net 56, while dispersing the sawdust, slow its descent, increasing its contact time with air and facilitating heat dissipation. Furthermore, the discharge end of the discharge hopper 13 is enclosed by a long rod 131, ensuring ample contact between air and sawdust.

[0035] As another embodiment, such as Figures 8 to 9As shown, the linkage mechanism 6 of this application includes a second driving rod 61 and a second driven rod 62. One end of the second driving rod 61 is fixedly connected to the output end of the motor 41, and the other end of the second driving rod 61 is rotatably connected to one end of the second driven rod 62. The other end of the second driven rod 62 is hinged to the swing rod 53. The second driving rod 61 and the second driven rod 62 form a linkage structure. When the second driving rod 61 rotates, the second driven rod 62 reciprocates, driving the swing rod 53 to reciprocate. The linkage mechanism 6 also includes a limiting rod 63 and a limiting ring 64. The second driven rod 62 passes through the limiting ring 64. One end of the limiting rod 63 is fixed to the top wall of the feed hopper 12, and the other end of the limiting rod 63 is fixedly connected to the limiting ring 64. The limiting ring 64 can support the second driven rod 62 on the one hand, and improve the stability of the second driven rod 62 on the other hand. By setting the linkage mechanism 6, the grinding mechanism 2, the dispersing mechanism 3 and the heat dissipation mechanism 5 can move in linkage, making full use of the power device on the one hand, and improving the overall integrity of the device on the other. The linkage mechanism 6 can also be equipped with a motor 41 in the discharge hopper 13 and controlled separately from the reciprocating mechanism 4. In this case, the second drive rod 61 is fixedly connected to the output end of the motor 41 in the discharge hopper 13.

[0036] The working principle of a uniformly drying wood chip dryer disclosed in this application is as follows: Wood chips enter from the feed hopper 12 and pass through the first spiral coil 21 and the second spiral coil 22. The friction between the first and second spiral coils 21 and 22 breaks up any clumps of wood chips. The wood chips fall onto the support plate 33, where the continuously extending and rotating spiral blades 31 disperse them and sweep them under the support plate 33, allowing them to enter the drum 11 for drying. The motor 41 drives the first driving rod 42 and the first driven rod 43, which in turn drive the rack 45 and the gear 46 to reciprocate. The rotating shaft 121, fixedly connected to the gear 46, reciprocates accordingly, further driving the spiral blades 31 and the second spiral coil 22 to rotate reciprocally. Because the second spiral coil 22 will intersect with the first spiral coil 21 when rotating 360 degrees, the second spiral coil 22 needs to rotate in a reciprocating motion. After the sawdust is dried, it is discharged from the discharge hopper 13. The sawdust is first shaken by the shaking net 51 and then further dispersed and shaken by the vibrating net 56, thereby achieving the effect of heat dissipation. The second driven rod 62 and the second driving rod 61 push the swing rod 53 to swing, causing the shaking net 51 to shake. When the arc plate 54 fixed on the swing rod 53 rubs against the protrusion 561, the arc block 55 fixed on the arc plate 54 and the arc block 55 and the protrusion 561 are squeezed to generate vibration, causing the vibrating net 56 to vibrate.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A wood chip dryer for uniform drying, comprising a frame (1), a feed hopper (12), a discharge hopper (13), and a drum (11), characterized in that... The two ends of the roller (11) are rotatably connected to the feed hopper (12) and the discharge hopper (13), respectively. The feed hopper (12) and the discharge hopper (13) are fixed on the frame (1). The roller (11) is rotatably mounted on the frame (1). The feed hopper (12) is equipped with a grinding mechanism (2) for crushing wood chips that clump together. Below the grinding mechanism (2) is a dispersing mechanism (3) for breaking up the wood chips so that the wood chips are dried evenly in the roller (11). The grinding mechanism (2) and the dispersing mechanism (3) are connected by a rotating shaft (121). The rotating shaft (121) is fixedly connected to a reciprocating mechanism (4) for reciprocating rotation. The discharge hopper (13) is equipped with a heat dissipation mechanism (5) for dissipating heat from the wood chips. The heat dissipation mechanism (5) and the reciprocating mechanism (4) are movably connected by a linkage mechanism (6).

2. The wood chip dryer with uniform drying according to claim 1, characterized in that, The grinding mechanism (2) includes a first spiral coil (21) and a second spiral coil (22). The edge side of the first spiral coil (21) is fixedly connected to the inner wall of the feed hopper (12). The center side of the first spiral coil (21) is rotatably connected to the rotating shaft (121). The edge side of the second spiral coil (22) is slidably in contact with the inner wall of the feed hopper (12). The center side of the second spiral coil (22) is fixedly connected to the rotating shaft (121). The first spiral coil (21) and the second spiral coil (22) are congruent, and the center side of the second spiral coil (22) is in contact with the center side of the first spiral coil (21).

3. The wood chip dryer with uniform drying according to claim 2, characterized in that, The dispersing mechanism (3) includes a spiral blade (31), a counterweight (32), and a support plate (33). The counterweight (32) is fixedly connected to one end of the spiral blade (31), and the other end of the spiral blade (31) is fixedly connected to the rotating shaft (121). The center of the support plate (33) is fixedly connected to the rotating shaft (121), and the spiral blade (31) and the counterweight (32) move on the upper surface of the support plate (33).

4. The wood chip dryer with uniform drying according to claim 3, characterized in that, The reciprocating mechanism (4) includes a motor (41), a first driving rod (42), a first driven rod (43), a connecting block (44), a rack (45), and a gear (46). The motor (41) is fixed inside the feed hopper (12). One end of the first driving rod (42) is fixedly connected to the output section of the motor (41). The other end of the first driving rod (42) is rotatably connected to one end of the first driven rod (43). The other end of the first driven rod (43) is hinged to the connecting block (44). The connecting block (44) is fixedly connected to the middle of the rack (45). The rack (45) meshes with the teeth of the gear (46). The center of the gear (46) is fixedly connected to the center of the rotating shaft (121).

5. A wood chip dryer with uniform drying according to claim 4, characterized in that, The heat dissipation mechanism (5) includes a swaying net (51), a rotating rod (52), a swing rod (53), an arc plate (54), an arc block (55), a vibrating net (56), a protrusion (561), a telescopic rod (57), a spring (58), and a fixing ring (59). Both ends of the rotating rod (52) are rotatably connected to the inner wall of the discharge hopper (13). The swaying net (51) is fixedly connected to the rotating rod (52). The swing rod (53) passes through and is perpendicular to the rotating rod (52). One end of the swing rod (53) is fixedly connected to the arc plate (54). The other end of the swing rod (53)... One end points away from the outlet of the hopper (13), the arc block (55) is fixedly connected to the arc plate (54) away from the swing rod (53), the protrusion (561) is fixedly connected to the shaking net (51), the protrusion (561) is in contact with the arc block (55), the fixing ring (59) is fixed to the inner wall of the outlet hopper (13), one end of the telescopic rod (57) is fixedly connected to the vibration net (56), the other end of the telescopic rod (57) is fixed to the fixing ring (59), and the spring (58) is sleeved on the outer wall of the telescopic rod (57).

6. A wood chip dryer with uniform drying according to claim 5, characterized in that, The linkage mechanism (6) includes a second driving rod (61) and a second driven rod (62). One end of the second driving rod (61) is fixedly connected to the output end of the motor (41), and the other end of the second driving rod (61) is rotatably connected to one end of the second driven rod (62). The other end of the second driven rod (62) is hinged to the swing rod (53).

7. A wood chip dryer with uniform drying according to claim 6, characterized in that, The linkage mechanism (6) further includes a limiting rod (63) and a limiting ring (64). The second driven rod (62) passes through the limiting ring (64). One end of the limiting rod (63) is fixed to the top wall of the feed hopper (12), and the other end of the limiting rod (63) is fixedly connected to the limiting ring (64).

8. A wood chip dryer with uniform drying according to claim 5, characterized in that, The end of the discharge hopper (13) is composed of several long rods (131), and the edge of the fixing ring (59) is fixedly connected to the long rods (131).

9. A wood chip dryer with uniform drying according to claim 4, characterized in that, The gear (46) and the rack (45) are covered with protective sleeves (7), which are fixed to the inner wall of the feed hopper (12).

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