Wood chip winnowing mechanism

Abstract

The utility model discloses a wood chip winnowing mechanism which is characterized in that an air conveying straight pipe axially and sequentially passes through an air inlet, wood chip flow of a flow guide inclined plate at the bottom and a discharge port, and air centrifugally blown out by a centrifugal fan directly enters the air conveying straight pipe, extends along the air conveying straight pipe and is directly blown to wood chip waterfall flow and the discharge port of a winnowing box. And the substantial air volume range of the winnowing mechanism (air inlet) is larger and is about 0 to the maximum air volume of the centrifugal fan, so that the wood chip winnowing mechanism is suitable for most kinds of wood and wood chips with different specifications cut by most manufacturers. The air conveying straight pipe and the centrifugal fan are further suitable for stopping impurities splashed by the impurity discharging inclined plate, so that the impurities fall back to the impurity collecting hopper, and the impurities are prevented from being scattered on the floor of the workshop.

Description

Technical Field

[0001] The utility model relates to the processing of wood shavings raw materials, in particular to a wood chip air separation mechanism. Background Art

[0002] In wood processing, in order to facilitate wood transportation, wood can be chipped into wood chips and used through a wood chipper; in addition, other wood processing generates surplus wood or wood blocks. In order to improve wood utilization, the surplus wood and wood blocks are chipped and used for wood chipping.

[0003] The wood chip derivation process often carries impurities such as stones, iron blocks and iron tools. Figure 6 In the company's existing design, the wood chip shaving machine is equipped with a wood chip air separation mechanism. The upper end of the 90-degree elbow is connected to the fan, and the lower end of the 90-degree elbow is suitable for blowing the wood chips in the waterfall. Qualified wood chips are blown into the roller drum, and heavy wood chips and stones and iron blocks fall and are separated basically according to the original waterfall parabola.

[0004] In practice, it was found that different woods have different textures, and some woods are relatively strong. On the other hand, the air volume range of the air separation mechanism is relatively small due to the air blown out by the 90-degree elbow attenuation fan. Even if the fan is adjusted to the highest level, it is difficult to separate the wood chips of the strong wood at a high separation ratio. Utility Model Content

[0005] The present invention aims to solve at least one of the above-mentioned technical problems and provide a wood chip air separation mechanism to improve the range of wood types that can be air-separated.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A wood chip air separation mechanism comprises an air separation box, an air delivery straight pipe and a centrifugal fan, the air separation box is provided with a top feed port, an air inlet, an outlet, a debris removal inclined plate, a bottom debris removal port and at least two guide inclined plates arranged in an upper and lower direction, the upper guide inclined plate is suitable for cascading wood chips to the lower guide inclined plate, the debris removal inclined plate is inclined downwardly from the lower edge of the outlet port to the side where the lowest guide inclined plate is located, the debris removal inclined plate is suitable for guiding air to the bottom debris removal port, the lowest guide inclined plate is suitable for cascading wood chips to the debris removal inclined plate, one end of the air delivery straight pipe is suitable for connecting with the air inlet, the axial direction of the air delivery straight pipe sequentially extends through the air inlet, the wood chip flow of the lowest guide inclined plate and the outlet, the centrifugal fan is horizontally arranged, and the peripheral wall of the centrifugal fan is provided with an air blower suitable for connecting with the other end of the air delivery straight pipe;

[0008] The air delivery straight pipe and the centrifugal fan are also suitable for stopping the impurities splashed by the impurity removal inclined plate and making the impurities fall back.

[0009] Compared with the prior art, the beneficial effects of the present application include: the air blown out by the centrifugal fan directly enters the air delivery straight duct, and is extended along the air delivery straight duct, and is directly blown to the wood chip waterfall flow and the discharge port of the air separation box, so that the actual air volume range of the air separation mechanism (air inlet) is relatively large, about 0 to the maximum air volume of the centrifugal fan, so that the wood chip air separation mechanism is suitable for most types of wood and for wood chips of different specifications cut by most manufacturers; the air delivery straight duct extends straight outward, and then the centrifugal fan increases the outward extension volume, and the impurities splashed by the impurity discharge inclined plate are stopped and fall back to the impurity collecting bucket below the bottom impurity discharge port, avoiding impurities from being scattered on the workshop floor.

[0010] As an improvement of the above technical solution, the air separation box is provided with an extension arm suitable for installing the centrifugal fan, and both ends of the straight air supply pipe are flange-connected to the air separation box and the centrifugal fan respectively.

[0011] As an improvement of the above technical solution, the centrifugal fan includes a fan main casing, an end cover, an impeller and a blower motor. The blower motor is installed on the end cover. The impeller is connected to the blower motor and is installed on the end cover or the blower motor. The end cover is used to connect the blower motor and the impeller and is installed on the fan main casing. The fan main casing is provided with an operating port suitable for disassembling and assembling the impeller.

[0012] As an improvement of the above technical solution, the impeller is connected to the output shaft of the blower motor through a key bar or a spline structure, and the output shaft of the blower motor is connected to a locking nut suitable for locking the impeller.

[0013] As an improvement of the above technical solution, the fan main housing is provided with at least two rollers, and the at least two rollers are suitable for supporting one end of the impeller, and the other end of the impeller is mounted on the end cover or the blower motor.

[0014] As an improvement of the above technical solution, a mounting hole suitable for disassembling and assembling the roller is provided on the end side of the fan main housing, and the mounting hole is connected to the inner bore of the fan main housing, so that part of the peripheral wall of the roller protrudes into the inner bore of the fan main housing to support the impeller.

[0015] As an improvement to the above technical solution, it also includes an air suction pipe, one end of which is connected to the fan main housing to facilitate air intake into the center of the impeller.

[0016] As an improvement of the above technical solution, the suction pipe is conical, and the small end of the suction pipe is suitable for docking with the fan main housing.

[0017] As an improvement of the above technical solution, the fan main housing is provided with a semicircular slot, and the end of the suction pipe connected to the fan main housing is provided with a flange, and the semicircular slot is suitable for the flange to be snapped in from top to bottom.

[0018] As an improvement to the above technical solution, the portion of the flange that is not inserted into the semicircular slot is connected to the fan main housing via a screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following is a further detailed description of the specific embodiments of the present invention with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a structural diagram of a wood chip air separation mechanism according to an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 An exploded view of the wood chip winnowing mechanism is shown;

[0022] Figure 3 for Figure 2 A cross-sectional view showing a partial structure of a wood chip winnowing mechanism;

[0023] Figure 4 for Figure 1 A side angled cross-sectional view of a wood chip winnowing mechanism is shown;

[0024] Figure 5 for Figure 3 A schematic structural diagram showing another three-dimensional perspective of the structure;

[0025] Figure 6 This is a structural diagram of the company's existing wood chip air separation mechanism.

[0026] The accompanying drawings are only one specific embodiment of the present invention, and the form and structure of this specific embodiment should not limit the scope of other embodiments.

[0027] Air separation box 100, top feed port 110, air inlet 120, discharge port 130, impurity discharge inclined plate 140, bottom impurity discharge port 150, guide inclined plate 160, extension arm 170;

[0028] Air supply straight pipe 200;

[0029] Centrifugal fan 300 , fan main housing 310 , air blast port 311 , operating port 312 , semicircular slot 313 , end cover 320 , impeller 330 , blower motor 340 , locking nut 350 , roller 360 , air suction pipe 370 , flange 371 . DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1 、 Figure 2 and Figure 4 The utility model provides a wood chip air separation mechanism, including an air separation box 100, an air delivery straight pipe 200 and a centrifugal fan 300. The air separation box 100 is provided with a top feed port 110, an air inlet 120, an outlet 130, a debris removal inclined plate 140, a bottom debris removal port 150 and at least two guide inclined plates 160 arranged in an up-down direction. The upper guide inclined plate 160 is suitable for cascading wood chips to the lower guide inclined plate 160. The debris removal inclined plate 140 is inclined downward from the lower edge of the outlet 130 to guide the wood chips to the bottom. On the side where the inclined plate 160 is located, the impurity discharge inclined plate 140 is suitable for guiding the flow to the bottom impurity discharge port 150, and the lowest guide inclined plate 160 is suitable for cascading wood chips to the impurity discharge inclined plate 140. One end of the air supply straight pipe 200 is suitable for connecting to the air inlet 120. The axial direction of the air supply straight pipe 200 extends through the air inlet 120, the wood chip flow of the lowest guide inclined plate 160, and the discharge port 130 in sequence. The centrifugal fan 300 is arranged horizontally, and the peripheral wall of the centrifugal fan 300 is provided with a blower port 311 suitable for connecting to the other end of the air supply straight pipe 200.

[0032] The air delivery straight pipe 200 and the centrifugal fan 300 are also suitable for stopping impurities splashed by the impurity discharge inclined plate 140, making the impurities fall back, avoiding excessive splashing of impurities, and preventing impurities from flying away from the impurity collecting bucket below the bottom impurity discharge port 150.

[0033] Reference Figure 2 、 Figure 3 and Figure 5 It can be understood that the centrifugal fan 300 includes a fan casing, an impeller 330 and a blower motor 340. The impeller 330 is accommodated in the fan casing. The fan casing is provided with an axial air intake, which faces the center of the impeller 330. The peripheral wall of the fan casing is provided with the aforementioned blower port 311. The impeller 330 is connected to the blower motor 340 in a transmission manner. The impeller 330 is suitable for rolling in the fan casing. The center of the impeller 330 inhales air and blows it through the circumference in a centrifugal and exhaust manner. Figure 1 The V in2 Direction, centrifugal fan 300 air outlet reference Figure 4 The V out2 direction.

[0034] The discharge port 130 is connected to the cavity of the wood chip shaving machine; specifically, the discharge port 130 faces the center of the cutter drum of the wood chip shaving machine.

[0035] Reference Figure 1 、 Figure 2 and Figure 4 The air separation box 100 is integrally formed with the door panel of the wood chip shaving machine. The hob of the wood chip shaving machine can be conveniently disassembled and assembled by opening the door panel. Therefore, the door panel is suitable as one side wall of the air separation box 100, and the door panel is provided with a discharge port 130 of the air separation box 100.

[0036] The operation process of the present invention can be as follows: Figure 1 、 Figure 2 、 Figure 4 The V in1 Direction: the log chips flow into the feed port of the air separation box 100, and the log chips flow onto the uppermost guide inclined plate 160. The upper guide inclined plate 160 flows the wood chips toward the lower guide inclined plate 160, and the lowermost guide inclined plate 160 flows the wood chips toward the impurity removal inclined plate 140.

[0037] Reference Figure 4 Since the texture of wood chips is quite different from that of impurities, wood chips are greatly affected by wind. The axial direction of the air delivery pipe 200 extends through the air inlet 120, the wood chip flow of the lowest guide inclined plate 160, and the discharge port 130. The air outflow of the air delivery pipe 200 is Figure 4 The V out2 Direction, the wind blown out by the air delivery straight pipe 200 will carry the wood chips away from the original wood chip waterfall flow, (refer to Figure 4 The V ou11 The separated wood chips drift into the center of the cutter drum of the wood chip shaving machine through the outlet 130 of the air separation box 100, and the wood chips are gradually shaved during the rolling of the cutter drum;

[0038] Reference Figure 4 After the wood chips are separated and the remaining impurities land on the impurity discharge inclined plate 140, they flow directly along the impurity discharge inclined plate 140 to the impurity collection bucket below the bottom impurity discharge port 150, or touch the impurity discharge inclined plate 140 and splash upwards and are stopped by the air delivery straight pipe 200 or the centrifugal fan 300, and then fall back to the impurity collection bucket. Figure 4 The V ou12 In the direction, stones, iron blocks and heavy wood blocks fell and were collected.

[0039] Compared with the prior art, the beneficial effects of the present application include: the air centrifugally blown out by the centrifugal fan 300 directly enters the air delivery straight duct 200, and is extended along the air delivery straight duct 200, and is directly blown to the wood chip waterfall flow and the discharge port 130 of the air separation box 100, so that the actual air volume range of the air separation mechanism (air inlet 120) is relatively large, about 0 to the maximum air volume of the centrifugal fan 300, so that the wood chip air separation mechanism is suitable for most types of wood and for wood chips of different specifications cut by most manufacturers; the air delivery straight duct 200 extends straight outward, and then the centrifugal fan 300 increases the outward extension volume, and the impurities splashed by the impurity discharge inclined plate 140 are stopped and fall back to the impurity collecting bucket below the bottom impurity discharge port 150, to prevent impurities from being scattered on the workshop floor.

[0040] Reference Figure 1 、 Figure 2 and Figure 4 In some embodiments of the present invention, the air separation box 100 is provided with an extension arm 170 suitable for installing a centrifugal fan 300, and the two ends of the air supply straight pipe 200 are flange-connected to the air separation box 100 and the centrifugal fan 300 respectively. The air blast port 311 is suitable for detaching the air supply straight pipe 200, and the periphery of the impeller 330 is maintained and cleaned through the air blast port 311, and wood chip impurities (stones, iron blocks) that may be placed in the air supply straight pipe 200 can be conveniently dumped through the air blast port 311.

[0041] Reference Figure 2 、 Figure 3 and Figure 5 In some embodiments of the present invention, the centrifugal fan 300 includes a fan main casing 310, an end cover 320, an impeller 330 and a blower motor 340. The blower motor 340 is installed on the end cover 320. The impeller 330 is connected to the blower motor 340 in a transmission manner and is installed on the end cover 320 or the blower motor 340. That is, the impeller 330 is directly fixedly connected to the output shaft of the blower motor 340 in a flange manner (installation and transmission are completed synchronously), or is rotatably connected to the end cover 320 in a shaft hole manner and is connected to the output shaft of the blower motor 340 in a transmission manner, such as a spline transmission, a gear transmission, or a belt transmission. The end cover 320 is used to connect the blower motor 340 and the impeller 330 and is installed on the fan main casing 310. The fan main casing 310 is provided with an operating port 312 suitable for disassembling and installing the impeller 330. In the present invention, the impeller 330 is easy to disassemble and assemble. The end cover 320 is disassembled together with the impeller 330 and the blower motor 340. The impeller 330 can be completely exposed by disassembling the entire unit, so that the impeller 330 can be maintained.

[0042] Reference Figure 2 and Figure 3 In some embodiments of the present invention, the impeller 330 is connected to the output shaft of the blower motor 340 through a key bar or a spline structure, and the output shaft of the blower motor 340 is connected to a locking nut 350 suitable for locking the impeller 330.

[0043] In some embodiments of the present invention, the fan main housing 310 is provided with at least two rollers 360 , which are suitable for supporting one end of the impeller 330 , and the other end of the impeller 330 is mounted on the end cover 320 or the blower motor 340 .

[0044] Reference Figure 3 and Figure 5 In some embodiments of the present invention, a mounting hole suitable for disassembling and assembling the roller 360 is provided on the end side of the fan main housing 310. The mounting hole is connected to the inner chamber of the fan main housing 310, so that part of the peripheral wall of the roller 360 protrudes into the inner chamber of the fan main housing 310 to support the impeller 330. The disassembly, assembly, lubrication and maintenance of the roller 360 are more convenient.

[0045] In practice, it has been found that when natural wind is drawn directly into the inner chamber of the fan main housing 310 / the center of the impeller 330 through the air intake at the end of the fan main housing 310, i.e., when the centrifugal fan 300 has a short air intake path, the air blown by the impeller 330 diverges somewhat toward the air intake, resulting in uneven air intake and centrifugal airflow. In some embodiments of the present invention, an air intake duct 370 is further included, one end of which is connected to the fan main housing 310 to facilitate air intake into the center of the impeller 330.

[0046] Reference Figure 1 、 Figure 2 In some embodiments of the present invention, the air suction pipe 370 is conical, and the small end of the air suction pipe 370 is suitable for connecting with the fan main housing 310.

[0047] Reference Figure 1 、 Figure 2 In some embodiments of the present invention, the fan main housing 310 is provided with a semicircular slot 313. A flange 371 is provided at one end of the suction pipe 370 connected to the fan main housing 310. The semicircular slot 313 is adapted to engage the flange 371 from top to bottom. In this embodiment, the suction pipe 370 is easily disassembled and assembled. Exposing the suction port of the fan main housing 310 allows for a thorough cleaning of the impeller 330. Cleaning the impeller 330 does not require disassembling the impeller 330 or the blower motor 340. Once the impeller 330 is cleaned, the centrifugal fan 300 can be quickly put back into operation.

[0048] Reference Figure 1 、 Figure 2 In some embodiments of the present invention, the portion of the flange 371 that is not inserted into the semicircular slot 313 is connected to the fan main housing 310 via a screw. The suction pipe 370 can be pulled out by removing the only screw.

[0049] Reference Figure 1 、 Figure 2 , preferably, an air inlet protection net is set at the air inlet port of the suction pipe 370.

[0050] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be included in the scope of the technical solution of the present invention.

Claims

1. A wood chip air separation mechanism, characterized in that: include: The air separation box is provided with a top feed port, an air inlet, a discharge port, a debris removal inclined plate, a bottom debris removal port, and at least two guide inclined plates arranged in an up-down direction, wherein the upper guide inclined plate is adapted to cascade wood chips toward the lower guide inclined plate, the debris removal inclined plate is inclined downwardly from the lower edge of the discharge port to the side where the lowest guide inclined plate is located, the debris removal inclined plate is adapted to divert the flow toward the bottom debris removal port, and the lowest guide inclined plate is adapted to cascade wood chips toward the debris removal inclined plate; An air delivery straight pipe, one end of which is adapted to connect to the air inlet, wherein the axial direction of the air delivery straight pipe sequentially extends through the air inlet, the wood chip flow of the lowest guide inclined plate, and the discharge port; A centrifugal fan is arranged horizontally, and a blast port is provided on the peripheral wall of the centrifugal fan so as to be connected to the other end of the straight air delivery pipe; The straight air delivery pipe and the centrifugal fan are also suitable for stopping impurities splashed by the impurity removal inclined plate and making the impurities fall back.

2. The wood chip air separation mechanism according to claim 1, characterized in that: The air separation box is provided with an extension arm suitable for installing the centrifugal fan, and the two ends of the air supply straight pipe are flange-connected to the air separation box and the centrifugal fan respectively.

3. The wood chip air separation mechanism according to claim 1, characterized in that: The centrifugal fan includes a fan main housing, an end cover, an impeller and a blower motor. The blower motor is installed on the end cover. The impeller is connected to the blower motor and is installed on the end cover or the blower motor. The end cover is used to connect the blower motor and the impeller and is installed on the fan main housing. The fan main housing is provided with an operating port suitable for disassembling and assembling the impeller.

4. The wood chip air separation mechanism according to claim 3, characterized in that: The impeller is connected to the output shaft of the blower motor through a key bar or a spline structure, and the output shaft of the blower motor is connected to a locking nut suitable for locking the impeller.

5. The wood chip air separation mechanism according to claim 3, characterized in that: The fan main housing is provided with at least two rollers, and the at least two rollers are suitable for supporting one end of the impeller, and the other end of the impeller is installed on the end cover or the blower motor.

6. The wood chip air separation mechanism according to claim 5, characterized in that: The end side of the fan main housing is provided with a mounting hole suitable for disassembling and assembling the roller, and the mounting hole is connected to the inner bore of the fan main housing, so that part of the peripheral wall of the roller protrudes into the inner bore of the fan main housing to support the impeller.

7. The wood chip air separation mechanism according to any one of claims 3 to 6, characterized in that: It also includes an air suction pipe, one end of which is connected to the fan main housing so as to allow air to enter the center of the impeller.

8. The wood chip air separation mechanism according to claim 7, characterized in that: The air suction pipe is conical, and the small end of the air suction pipe is suitable for connecting with the fan main housing.

9. The wood chip air separation mechanism according to claim 7, characterized in that: The fan main housing is provided with a semicircular slot, and one end of the suction pipe connected to the fan main housing is provided with a flange, and the semicircular slot is suitable for the flange to be clamped in from top to bottom.

10. The wood chip air separation mechanism according to claim 9, characterized in that: The portion of the flange that is not inserted into the semicircular slot is connected to the fan main housing via a screw.

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