Automatic feeding system for screening wood shavings and intelligent screening line

Abstract

The automatic feeding system comprises a material receiving and conveying mechanism, the discharging side of the material receiving and conveying mechanism is connected with the feeding sides of a plurality of sheet arranging and conveying mechanisms, and the sheet arranging and conveying mechanisms are arranged in the conveying direction of the wood shavings. The sheet arranging and conveying mechanism comprises a first lower sliding plate, a first conveying mechanism, a second lower sliding plate, a second conveying mechanism, a third lower sliding plate and a third conveying mechanism which are sequentially arranged, and the width of the first lower sliding plate is gradually reduced in the conveying direction of the wood shavings so that the width of the discharging side of the first lower sliding plate can correspond to the width of the wood shavings; a baffle is arranged above the feeding end of the second conveying mechanism, a set gap is formed between the bottom end of the baffle and the top face of the second conveying mechanism, the feeding end of the third lower sliding plate is located below the discharging end of the second conveying mechanism by a first set distance, and the discharging end of the third lower sliding plate is located above the feeding end of the third conveying mechanism by a second set distance. By the adoption of the system, automation and intelligentization of the wood shaving sheet screening process are achieved, and the labor safety of workers is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of wood chippings, and in particular to an automatic feeding system and an intelligent screening line for screening wood chippings. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Particleboard is made of shavings. Shavings detection is an important part of quality control in the production process of particleboard. If the quality of shavings is not up to standard, the grade of particleboard products will be reduced, the scrap rate will increase, and even production accidents will occur. At present, there is no detection system for shavings. Shavings are detected manually, which has high labor intensity, low detection efficiency, and cannot guarantee the detection quality. The current visual intelligent screening system can be applied to the detection and screening of shavings, realize the automatic intelligent screening of shavings, reduce the labor intensity of staff, improve the detection efficiency, and ensure the detection quality. However, when the shavings are detected by the visual intelligent screening system, the shavings need to be sent to the visual intelligent screening system for detection at a certain distance. At present, when the shavings are incoming, all the shavings are piled together in a disorderly manner. Therefore, it is a problem that technicians in this field need to solve urgently to automatically arrange the shavings that are piled together in a disorderly manner so that the single pieces can enter the visual intelligent screening system at a certain distance. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an automatic feeding system and an intelligent screening line for screening wood chips, which can automatically separate the randomly stacked wood chips into single pieces arranged in sequence at a certain distance, so as to facilitate detection by a visual intelligent screening system.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] In the first aspect, an embodiment of the present invention provides an automatic loading system for screening wood chips, including a material receiving and conveying mechanism, wherein the discharge side of the material receiving and conveying mechanism is connected to the feed side of multiple wood chip sorting conveying mechanisms, and along the conveying direction of the wood chip, the wood chip sorting conveying mechanism includes a first lower slide plate, a first conveying mechanism, a second lower slide plate, a second conveying mechanism, a third lower slide plate and a third conveying mechanism which are arranged in sequence, and along the conveying direction of the wood chip, the width of the first lower slide plate gradually decreases so that the width of its discharge side corresponds to the width of the wood chip, a baffle is provided above the feed end of the second conveying mechanism, and a set gap is provided between the bottom end of the baffle and the top surface of the second transmission mechanism so that the gap between the baffle and the second conveying mechanism only allows a single wood chip to pass through, and the feed end of the third lower slide plate is located at a first set distance below the discharge end of the second conveying mechanism, and the discharge end is located at a second set distance above the feed end of the third conveying mechanism.

[0007] Optionally, a fourth conveying mechanism is provided at a third set distance in front of the first conveying mechanism, and a top surface of the fourth conveying mechanism is higher than a top surface of the first conveying mechanism by a fourth set distance to preliminarily spread the stacked wood chips;

[0008] Furthermore, the end of the fourth conveying mechanism is connected to the material receiving conveying mechanism.

[0009] Optionally, along the conveying direction of the wood chips, a 3D laser profile sensor and an air blow pump are sequentially arranged on one side of the second conveying mechanism downstream of the baffle, and the 3D laser profile sensor is used to detect the stacked wood chips so as to blow the stacked wood chips away through the air blow pump;

[0010] Furthermore, a fifth conveying mechanism is provided on the opposite side of the air pump to receive the wood chips blown away by the air pump, and the end of the fifth conveying mechanism is connected to the material receiving conveying mechanism.

[0011] Optionally, the baffle is connected to the first lifting mechanism to adjust the distance between the bottom end of the baffle and the second conveying mechanism.

[0012] Optionally, the discharge end of the first lower slide plate is hinged to the support plate, the other end of the first lower slide plate is hinged to one end of the angle adjustment cylinder, the other end of the angle adjustment cylinder is hinged to the support plate, the support plate is installed on the first traveling vehicle through the second lifting mechanism, and correspondingly, the material receiving and conveying mechanism is installed on the second traveling vehicle through the third lifting mechanism.

[0013] Optionally, the center position of the third lower slide plate is connected to a rotating drive element to adjust the angle of the third lower slide plate.

[0014] Optionally, the first lower slide plate is connected to a vibration motor.

[0015] In the second aspect, an embodiment of the present invention provides an intelligent screening line for wood chips, including the automatic loading system for screening wood chips described in the first aspect, the discharge end of the third conveying mechanism corresponds to the feed end of the visual intelligent screening system, the visual intelligent screening system includes a screening lower slide plate, the screening lower slide plate adopts a transparent plate, and along the conveying direction of the wood chips, a 3D laser contour sensor, a first sorting device, a first color mark sensor group, a second sorting device, a second color mark sensor group and a third sorting device are sequentially provided, wherein the 3D laser contour sensor and the first color mark sensor group are located above the screening lower slide plate, and the second color mark sensor group is located below the screening lower slide plate.

[0016] Optionally, the screening lower slide is connected to the angle adjustment mechanism, and the 3D laser profile sensor, the first sorting device, the first color mark sensor group, the second sorting device, the second color mark sensor group and the third sorting device are all connected to the screening lower slide through a bracket;

[0017] Furthermore, the 3D laser profile sensor, the first color mark sensor group, and the second color mark sensor group are all connected to the bracket via a fourth lifting mechanism.

[0018] Optionally, the first sorting device and the second sorting device adopt a robotic arm, and a vacuum suction cup is provided at the end of the robotic arm.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The automatic feeding system for screening shavings of the present invention has a discharge end width of the first lower slide matched with a width of the shavings, so that the first lower slide only allows a single shavings arranged along the conveying direction in the length direction or a plurality of shavings arranged along the conveying direction in the length direction in a stacked manner to pass through, thereby adjusting the orientation of the shavings and realizing directional arrangement of the shavings. After the shavings enter the second conveying mechanism through the second lower slide, the shavings are spread under the action of the baffle plate, thereby avoiding stacking of the shavings. Since the feeding end of the third lower slide is located at a set distance below the discharge end of the second conveying mechanism, when the shavings fall into the third lower slide, a certain distance is generated between adjacent shavings, thereby realizing arrangement of the shavings at a certain distance. After the shavings arranged at a certain distance enter the third conveying mechanism, they can enter the visual screening system through the third conveying mechanism for detection. The feeding system realizes that a plurality of shavings are automatically arranged and transmitted at a certain distance in sequence, thereby meeting the requirements of using a visual intelligent screening system for detection and screening, improving the working efficiency and quality of shavings detection and screening, and reducing the labor intensity of the staff.

[0021] 2. In the automatic feeding system and intelligent screening line for screening of shavings of the present invention, the first lower slide is connected to the angle adjustment cylinder, the second lower slide is connected to the rotating drive member, the screening lower slide is connected to the angle adjustment mechanism, and the angles of the first lower slide, the third lower slide and the screening lower slide can be adjusted, which meets the requirements for the downward conveying of different types of shavings and improves the applicability of the entire feeding system and screening line. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of embodiment 1 of the present invention;

[0024] Figure 2 It is a top view of the connection between the material receiving conveying mechanism and the first lower slide plate when the first embodiment of the present invention has two sheet sorting conveying mechanisms;

[0025] Figure 3 It is a top view of the connection between the material receiving conveying mechanism and the first lower slide plate when the embodiment 1 of the present invention has four-strip sheet sorting conveying mechanism;

[0026] Figure 4 This is a schematic diagram of the main view of the visual intelligent screening system according to Embodiment 2 of the present invention;

[0027] Figure 5 is a schematic diagram of a first sorting device, a second sorting device, or a third sorting device in Embodiment 2 of the present invention;

[0028] Among them, 1. material receiving and conveying mechanism, 2. first lower slide, 3. first conveying mechanism, 4. second lower slide, 5. second conveying mechanism, 6. third lower slide, 7. third conveying mechanism, 8. support plate, 9. angle adjustment cylinder, 10. hydraulic cylinder, 11. first traveling vehicle, 12. second traveling vehicle, 13. hydraulic cylinder, 14. baffle, 15. fourth conveying mechanism, 16. 3D laser contour sensor, 17. air pump, 18. rotating drive motor, 19. screening lower slide, 20. 3D laser contour sensor, 21. first sorting device, 22. first color mark sensor group, 23. second sorting device, 24. second color mark sensor group, 25. third sorting device, 26. vacuum suction cup, 27. angle adjustment motor, 28. counting sensor, 29. control system, 30. industrial computer. DETAILED DESCRIPTION

[0029] Example 1

[0030] This embodiment provides an automatic feeding system for screening wood chips. Figure 1-Figure 3As shown, it includes a material receiving and conveying mechanism 1, which is used to receive wood chips to be detected. The wood chips received by the material receiving and conveying mechanism 1 are a large number of randomly stacked wood chips.

[0031] In this embodiment, the material receiving and conveying mechanism 1 adopts a belt conveying mechanism, which can convey the wood chips.

[0032] The end of the receiving conveyor mechanism 1 is connected to the feed end of multiple chipping conveyor mechanisms, and can feed the received multiple chipping conveyor mechanisms into the multiple chipping conveyor mechanisms. There are two or four or more chipping conveyor mechanisms, and those skilled in the art can set the number according to actual needs, which will not be described in detail here.

[0033] Along the conveying direction of the wood chip, the chip sorting and conveying mechanism includes a first lower slide plate 2, a first conveying mechanism 3, a second lower slide plate 4, a second conveying mechanism 5, a third lower slide plate 6 and a third conveying mechanism 7 which are arranged in sequence.

[0034] The first lower slide plate 2 is used to receive the wood chips conveyed by the material receiving and conveying mechanism 1 and allow the wood chips to slide down to the first conveying mechanism 3 under the action of gravity.

[0035] In this embodiment, the height of the feed end of the first lower slide plate 2 is higher than the height of the discharge end so that the shavings can slide down. It includes a bottom plate, and baffle plates are provided on both sides of the bottom plate. The baffle plates close to each other of adjacent first lower slide plates 2 are cross-fixed in a V shape at the feed end to divert the shavings so that the shavings on the material receiving and conveying mechanism 1 enter different first lower slide plates 2.

[0036] In this embodiment, along the conveying direction of the shavings, the width of the first lower slide plate 2 gradually decreases, and the width of the discharge end of the first lower slide plate 2 corresponds to the width of the shavings, and its width is slightly larger than the width of the shavings, so that the shavings can only pass through the discharge end of the first lower slide plate in a posture where the length direction is set along the conveying direction, which plays a role in orienting the shavings.

[0037] The wood chip passing through the first lower slide plate 2 is a single wood chip whose length direction is arranged along the conveying direction, or a plurality of stacked wood chips whose length direction is arranged along the conveying direction.

[0038] Furthermore, in order to prevent the wood chips from being blocked during the sliding process of the first lower slide 2, a vibration motor is installed on the bottom surface of the first lower slide 2, and the vibration motor makes the first lower slide 2 vibrate, thereby ensuring the smooth sliding of the wood chips.

[0039] Furthermore, in order to meet the sliding requirements of different shavings, the angle of the first lower slide plate 2 can be adjusted. Specifically, the discharge end of the first lower slide plate 2 is rotatably connected to the support plate 8, and the other end of the first lower slide plate 2 is hinged to one end of the angle adjustment cylinder 9, and the other end of the angle adjustment cylinder 9 is hinged to the support plate 8. The extension and retraction of the piston rod of the angle adjustment cylinder 9 can drive the first lower slide plate 2 to rotate, thereby adjusting the angle of the first lower slide plate 2.

[0040] Furthermore, in order to enable the first lower slide plate 2 to dock with the material receiving and conveying mechanism and the first conveying mechanism at any angle and ensure the smooth transmission of the wood chips, the support plate 8 is connected to the second lifting mechanism. In this embodiment, the second lifting mechanism adopts a hydraulic cylinder 10 arranged at the front and rear ends of the support plate, the piston rod of the hydraulic cylinder 10 is connected to the support plate 8, and the cylinder body of the hydraulic cylinder 10 is fixed on the first traveling vehicle 11. The first traveling vehicle 11 can adopt the existing electric traveling vehicle, and its specific structure is not described in detail here. Correspondingly, the material receiving and conveying mechanism 1 is installed on the second traveling vehicle through the third lifting mechanism. In this embodiment, the third lifting mechanism adopts a hydraulic cylinder 13 installed on the second traveling vehicle 12, the cylinder body of the hydraulic cylinder is connected to the second traveling vehicle, and its piston rod is connected to the material receiving and conveying mechanism. The second traveling vehicle 12 can adopt the existing electric traveling vehicle, and its specific structure is not described in detail here.

[0041] In this embodiment, after the angle of the first lower slide plate 2 is adjusted, the second lifting mechanism and the first traveling vehicle 11 work together to dock the discharge end of the first lower slide plate 2 with the feed end of the first conveying mechanism 3, and then the second traveling vehicle 12 and the third lifting mechanism work to dock the material receiving conveying mechanism 1 with the feed end of the first lower slide plate 2.

[0042] It should be noted that, since the wood chips are light in weight, the vibration motor causes the first lower slide plate 2 to vibrate slightly to ensure that the wood chips are not blocked, and the vibration will not affect the normal operation of the angle adjustment cylinder 9, the hydraulic cylinder 10 and the first travel vehicle 11.

[0043] In another embodiment, the middle portion of the outer side of the first lower slide plate 2 is connected to the output shaft of the rotary drive motor, the rotary drive motor is fixed to the support plate 8 through a motor seat, and the support plate is connected to the second lifting mechanism.

[0044] The first conveying mechanism 3 is a belt conveying mechanism, the width of which matches the width of the wood chips, and is used to receive the wood chips sent out by the first lower slide plate 2 and further convey the wood chips.

[0045] The feed end of the first conveying mechanism 3 is connected to the feed end of the second lower slide plate 4. The height of the feed end of the second lower slide plate 4 is higher than the height of the discharge end. The angle of the second lower slide plate 4 is set to a larger angle so that any shavings can slide down under the action of gravity. The width of the second lower slide plate 4 matches the width of the shavings, and baffles are provided on both sides to prevent the shavings from falling from the second lower slide plate 4.

[0046] The discharging end of the second lower slide plate 4 is connected to the feeding end of the second conveying mechanism 5 to receive the wood chips delivered by the second lower slide plate 4 .

[0047] In this embodiment, the second conveying mechanism 5 is a belt conveying mechanism, the width of which matches the width of the wood chips.

[0048] A baffle 14 is provided above the feed end of the second conveying mechanism 5, and a set gap is provided between the bottom end of the baffle 14 and the top surface of the second conveying mechanism 5, and the set gap only allows wood chips of a single thickness to pass through, so as to spread the stacked wood chips.

[0049] Furthermore, the baffle 14 is connected to a first lifting mechanism, and the first lifting mechanism can lift the baffle 14 to achieve adjustment of the set gap size.

[0050] In this embodiment, the first lifting mechanism adopts a screw lifting mechanism located on both sides of the second conveying mechanism 5. The screw lifting mechanism can adopt the existing technology. The lifting parts of the screw lifting mechanism on both sides are respectively connected to the two ends of the baffle 14 to drive the baffle to rise and fall.

[0051] A fourth conveying mechanism 15 is provided at a third set distance in front of the junction between the discharge end of the first conveying mechanism 3 and the feed end of the second lower slide plate 4. The fourth conveying mechanism 15 adopts a belt conveying mechanism. The top surface of the fourth conveying mechanism 15 is higher than the top surface of the first conveying mechanism 3 by the fourth set distance, which is convenient for the falling of the shavings. When the stacked shavings pass through the gap between the feed end of the fourth conveying mechanism 15 and the discharge end of the first conveying mechanism 3, they can be preliminarily spread. The shavings located above enter the fourth conveying mechanism 15, and the shavings located below fall along the second lower slide plate 4.

[0052] The third set distance and the fourth set distance can be set according to actual needs and will not be described in detail here.

[0053] In this embodiment, the fourth conveying mechanism 15 is a belt conveying mechanism, and its discharging end is connected to the receiving conveying mechanism 1 to convey the wood chips to the receiving conveying mechanism 1 .

[0054] Along the conveying direction of the wood chips, a 3D laser profile sensor 16 and a blow pump 17 are provided on one side of the second conveying mechanism 5 downstream of the baffle 14. The 3D laser profile sensor 16 is located upstream of the blow pump 17. The 3D laser profile sensor 16 is used to detect the wood chips passing through the gap between the baffle 14 and the second conveying mechanism 5. When there are still stacked wood chips, the stacked wood chips move to the corresponding position of the blow pump 17, and the blow pump 17 works to blow away the stacked wood chips.

[0055] The 3D laser profile sensor 16 can be an existing device, which has a laser emitting end and a receiving end, and can scan the side of the wood chips, thereby identifying the wood chips in a stacked state.

[0056] The air pump 17 is located on one side of the second conveying mechanism 5. A fifth conveying mechanism is disposed on the other side of the second conveying mechanism 5. The fifth conveying mechanism is disposed opposite to the air pump 17. The wood chips blown away by the air pump 17 can fall to the fifth conveying mechanism.

[0057] In this embodiment, the fifth conveying mechanism is a belt conveying mechanism, and the discharging end of the fifth conveying mechanism is connected to the receiving conveying mechanism 1 to deliver the conveyed wood chips to the receiving conveying mechanism 1 .

[0058] The width of the third lower slide plate 6 matches the width of the wood shavings, and baffle plates are provided on both sides of the third lower slide plate 6 to prevent the wood shavings from falling off the third lower slide plate 6 .

[0059] The feeding end of the third lower slide plate 6 is located a first set distance below the discharging end of the second conveying mechanism 5 , and the discharging end is located a second set distance above the feeding end of the third conveying mechanism 7 .

[0060] With this arrangement, when the wood chips enter the third lower slide plate 6 from the second conveying mechanism 5, they do not enter continuously but enter at set intervals, so that a certain gap is left between adjacent wood chips.

[0061] The first set distance and the second set distance can be set according to actual needs and will not be described in detail here.

[0062] Furthermore, the middle positions on both sides of the third lower slide plate 6 are connected to the rotating drive member, and the rotating drive member adopts a rotating drive motor 18. The rotating drive motor 18 is fixed to the bracket through a motor seat, and the bracket is fixed on the ground foundation. By rotating the drive motor 18, the angle of the third lower slide plate 6 can be adjusted to meet the sliding conveying needs of various wood chips.

[0063] In this embodiment, the relative position of the second conveying mechanism 5 and the feeding end of the third lower slide plate 6 needs to satisfy that when the third lower slide plate 6 is adjusted to any angle, the wood chips can fall from the second conveying mechanism 5 to the third lower slide plate 6, and the relative position of the discharge end of the third lower slide plate 6 and the feeding end of the third conveying mechanism 7 needs to satisfy that when the third lower slide plate 6 is adjusted to any angle, the wood chips can fall from the third lower slide plate 6 to the third conveying mechanism 7.

[0064] The third conveying mechanism 7 is a belt conveying mechanism, the width of which matches the width of the wood chips. The conveying speed of the third conveying mechanism is greater than the conveying speed of the second conveying mechanism 5, and is used to convey the wood chips to the visual screening system.

[0065] The working method of the feeding system of this embodiment is:

[0066] Driven by the material receiving and conveying mechanism 1, multiple shavings enter different first lower slide plates 2 separately, and slide up and down the first lower slide plate 2. During the sliding process, since the width of the first lower slide plate 2 gradually decreases, and the width of its discharge end matches the width of the shavings, after the shavings are sent out from the first lower slide plate 2, the length direction of the shavings is arranged along the conveying direction, which adjusts the orientation of the shavings and realizes the directional arrangement of the shavings. Then the shavings enter the first conveying mechanism 3 for further conveying. The first conveying mechanism 3 sends the shavings to the second lower slide plate 4, and the shavings slide down the second lower slide plate 4 for conveying.

[0067] When the wood chips pass through the gap between the discharge end of the first conveying mechanism 3 and the feed end of the fourth conveying mechanism 15, the stacked wood chips are initially spread out, wherein the upper wood chips in the stacked wood chips enter the fourth conveying mechanism 15, re-enter the receiving conveying mechanism 1 through the fourth conveying mechanism 15, and the lower wood chips enter the second lower slide plate 4 and slide down.

[0068] The wood chips pass through the second lower slide plate 4 and enter the second conveying mechanism 5. When the wood chips pass through the gap between the baffle 14 and the second conveying mechanism 5, the stacked wood chips are further spread. When the wood chips pass through the 3D laser contour sensor 16, the 3D laser contour sensor 16 detects whether the wood chips are still stacked. When stacked wood chips are detected, a signal is sent to the control system. The control system controls the air pump 17 to work. When the stacked wood chips move to the corresponding position of the air pump 17, the air pump 17 works to blow the stacked wood chips to the fifth conveying mechanism. The fifth conveying mechanism re-conveys the wood chips to the material receiving conveying mechanism 1.

[0069] The second conveying mechanism 5 conveys the shavings, and the shavings fall from the discharge end of the second conveying mechanism 5 to the third lower slide plate 6. Since the feed end of the third lower slide plate 6 is located at a first set distance below the discharge end of the second conveying mechanism 5, the shavings entering the third lower slide plate 6 are not continuously entered, but enter at a certain distance, thereby realizing the conveyance of two adjacent shavings at a certain distance.

[0070] The wood chips delivered by the third lower slide plate 6 enter the third conveying mechanism 7, and the third conveying mechanism 7 delivers the wood chips to the visual screening system.

[0071] The automatic feeding system for shavings screening of the present embodiment realizes the arrangement and transmission of multiple shavings in sequence at a certain distance, meets the demand for detection and screening using a visual intelligent screening system, improves the work efficiency and quality of shavings detection and screening, and reduces the labor intensity of staff.

[0072] Example 2

[0073] This embodiment provides a shavings intelligent screening line, including the automatic feeding system for shavings screening described in Embodiment 1, and also including a visual intelligent screening system, wherein, Figure 4 As shown, the visual intelligent screening system includes a screening lower slide plate 19, the width of the screening lower slide plate 19 matches the width of the wood chips and is slightly larger than the width of the wood chips. Limiting plates are provided on both sides to prevent the wood chips from falling off the screening lower slide plate 19 during the sliding process. The height of the feeding end of the screening lower slide plate 19 is higher than the height of the discharging end. The feeding end of the screening lower slide plate 19 is located at a set distance below the discharging end of the third conveying mechanism 7 so as to be able to receive the wood chips delivered by the third conveying mechanism 7.

[0074] The screening lower slide plate 19 is a transparent plate, preferably a transparent glass plate. Along the sliding direction of the wood chips on the screening lower slide plate 19, a 3D laser profile sensor 20, a first sorting device 21, a first color mark sensor group 22, a second sorting device 23, a third color mark sensor group 24 and a third sorting device 25 are sequentially arranged.

[0075] The 3D laser profile sensor 20 and the first color mark sensor group 22 are located above the screening lower slide plate 19 , and the second color mark sensor group 24 is located below the screening lower slide plate 19 .

[0076] Since the detection range of a single color mark sensor cannot cover the entire surface of the wood chips, the first color mark sensor group 22 and the second color mark sensor group 24 are both provided with multiple color mark sensors, so that the coverage range of the multiple color mark sensors covers the width direction of the entire surface of the wood chips.

[0077] like Figure 5As shown, the first sorting device 21, the second sorting device 23 and the third sorting device 25 all use robotic arms, preferably existing six-degree-of-freedom robotic arms, whose specific structures are not described in detail here. The end of the six-degree-of-freedom robotic arms is connected to the vacuum suction cup 26, which can adsorb, fix and release the wood chips.

[0078] In this embodiment, the 3D laser profile sensor 20 , the first color mark sensor group 22 , and the second color mark sensor group 24 are all mounted on corresponding sensor brackets, and the multiple sensor brackets are fixedly connected to the screening lower slide plate 19 .

[0079] Furthermore, in order to meet the requirements for adjusting the distance between the 3D laser profile sensor 20, the first color mark sensor group 22, the second color mark sensor group 24 and the screening lower slide plate 19, the 3D laser profile sensor 20 is installed on the sensor bracket through a fourth lifting mechanism, the first color mark sensor group 22 is installed on the sensor bracket through a fourth lifting mechanism, and the second color mark sensor group 24 is installed on the sensor bracket through a fourth lifting mechanism.

[0080] In this embodiment, the fourth lifting mechanism adopts an existing screw lifting mechanism, and its specific structure is not described in detail here.

[0081] The three six-degree-of-freedom mechanical arms are fixed to the mechanical arm mounting base, and the mechanical arm mounting base is fixed to the screening lower slide plate 19.

[0082] Furthermore, in order to meet the sliding requirements of different shavings on the screening lower slide, the middle position of the side of the screening lower slide 19 is connected to the angle adjustment mechanism, and the angle adjustment mechanism adopts an angle adjustment motor 27, which is fixed on the motor base, and the motor base is fixed on the ground foundation.

[0083] Furthermore, along the conveying direction of the wood chips, a counting sensor 28 is provided upstream of the 3D laser profile sensor 20. In the present embodiment, the counting sensor 28 is a photoelectric sensor or a laser ranging sensor, and those skilled in the art may set it according to actual needs. The counting sensor 28 is provided above the screening lower slide plate 19 and is installed on a sensor bracket, and the sensor bracket is fixedly connected to the screening lower slide plate 19.

[0084] The counting sensor 28, the 3D laser profile sensor 20, the first color mark sensor group 22, the second color mark sensor group 24, and the three sorting devices are all connected to the control system 29, and the control system 29 is connected to the industrial computer 30. The counting sensor 28, the 3D laser profile sensor 20, the first color mark sensor group 22, and the second color mark sensor group 24 can transmit the detected information to the control system 29, and the control system 29 controls the three sorting devices to work and screen the wood chips.

[0085] In the intelligent screening line for shavings of the present embodiment, the shavings slide down on the screening lower slide plate 19, and when passing through the laser 3D intelligent sensor 20, cracks on the shavings are detected, and the shavings continue to slide down after the detection is completed. The control system makes a judgment based on the detection result of the 3D laser profile sensor 20, and the qualified shavings continue to slide down. When unqualified products are encountered, the first sorting device 21 is controlled to work, and the first sorting device 21 grabs and sends away the unqualified products through the vacuum suction cup 26.

[0086] In this embodiment, after the 3D laser profile sensor laser scans the wood chips, it can identify the width and length of the cracks inside the wood chips, and further calculate the area of ​​the cracks. At the same time, the 3D laser profile sensor can also identify the length and width of the entire wood chip, and calculate the area of ​​the entire wood chip. A value can be obtained by dividing the crack area by the area of ​​the entire wood chip. When this value exceeds the set limit value, the wood chip is judged to be unqualified, otherwise the wood chip is qualified. The set limit value can be determined according to the actual production situation, and will not be described in detail here.

[0087] Specifically, the 3D laser profile sensor emits a line laser. After the line laser is emitted from the emission port, it is bounced back to the receiving port on the object. The line laser can identify the elevation information of the object, thereby identifying the crack width and the width of the shavings. Set a suitable sampling frequency for the 3D laser profile sensor. As the shavings move on the screening slide, several crack widths and shavings widths can be obtained. These crack information can generate two-dimensional grid matrix data of the cracks, and then obtain the length and width of each crack in the shavings; similarly, the length and width of the entire shavings can also be obtained. The area of ​​the crack can be obtained from the length and width information of the crack, and similarly, the area of ​​the entire shavings can also be obtained. Dividing the crack area by the area of ​​the shavings can obtain a value, which can be used to determine whether the shavings are qualified products.

[0088] The shavings continue to slide down and pass through the first color mark sensor group 22, which detects the color of the upper surface of the shavings. Qualified products continue to slide down. When unqualified products are encountered, the control system 29 controls the second sorting device 23 to work, grab the unqualified products and then send them out. When the shavings slide to the second color mark sensor group 24, the second color mark sensor group 24 detects the color of the lower surface of the shavings. Qualified products continue to slide down, and unqualified products are grabbed and sent away by the third sorting device 25.

[0089] In this embodiment, changes in temperature and humidity can cause significant blueing and mildewing of the wood chips. The color code sensor can distinguish the area of ​​the blue-stained part and the area of ​​the mildewed part of the wood chips and the area of ​​the whole wood chips. A value can be obtained by dividing the sum of the area of ​​the blue-stained part and the area of ​​the mildewed part by the area of ​​the whole wood chips. When this value exceeds the set limit value, the wood chips are judged to be unqualified. The set limit value is determined according to the actual production conditions and will not be described in detail here.

[0090] The color mark sensor can identify the color of the object being detected. The single detection range of the color mark sensor is much smaller than that of the wood chips. Set a suitable sampling frequency for the color mark sensor. As the wood chips move on the screening slide, the color mark sensor can first clearly identify the detection starting point of the wood chips to be detected, and thus obtain several color mark detection results. As the detection proceeds, the color mark sensor can also identify the detection end point of the wood chips to be detected. Because the detection width of the color mark sensor is very limited, the wood chips must pass through multiple color mark sensors to complete the final detection. The detection range of multiple color mark sensors covers the width of the entire wood chips. The blue area, moldy area and the area of ​​the entire wood chips can be obtained from the several color mark detection information obtained during the detection process. Dividing the sum of the blue area and the moldy area by the area of ​​the entire wood chips can get a value, which can be used to determine whether the wood chips are qualified products.

[0091] In some other embodiments, an industrial camera may be used instead of the color mark sensor. The industrial camera collects images of the wood chips, uses the images to identify the blue-discolored parts and the moldy parts, and obtains the ratio of the sum of the areas of the blue-discolored parts and the moldy parts to the area of ​​the entire wood chip. This ratio is used to determine whether the wood chips are qualified products. The above technology can use existing technology and will not be described in further detail here.

[0092] In this embodiment, the wood chips are inspected by a visual intelligent screening system, which improves work efficiency, reduces labor intensity and improves screening accuracy compared to manual inspection. At the same time, workers do not need to perform manual inspection next to the production line, thereby ensuring their labor safety.

[0093] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic feeding system for wood chip screening, characterized in that: It includes a material receiving and conveying mechanism, the discharge side of the material receiving and conveying mechanism is connected to the feed side of multiple chip sorting conveying mechanisms, along the conveying direction of the wood chip, the chip sorting conveying mechanism includes a first lower slide plate, a first conveying mechanism, a second lower slide plate, a second conveying mechanism, a third lower slide plate and a third conveying mechanism which are arranged in sequence, along the conveying direction of the wood chip, the width of the first lower slide plate gradually decreases so that the width of its discharge side corresponds to the width of the wood chip, a baffle is provided above the feed end of the second conveying mechanism, a set gap is provided between the bottom end of the baffle plate and the top surface of the second transmission mechanism so that the gap between the baffle plate and the second conveying mechanism only allows a single wood chip to pass through, the feed end of the third lower slide plate is located a first set distance below the discharge end of the second conveying mechanism, and the discharge end is located a second set distance above the feed end of the third conveying mechanism.

2. The automatic feeding system for screening wood chips according to claim 1, characterized in that: A fourth conveying mechanism is provided at a third set distance in front of the first conveying mechanism, and a top surface of the fourth conveying mechanism is higher than a top surface of the first conveying mechanism by a fourth set distance so as to preliminarily spread the stacked wood chips; Furthermore, the end of the fourth conveying mechanism is connected to the material receiving conveying mechanism.

3. The automatic feeding system for screening wood chips according to claim 1, characterized in that: Along the conveying direction of the wood chips, a 3D laser profile sensor and an air blow pump are sequentially arranged on one side of the second conveying mechanism downstream of the baffle, wherein the 3D laser profile sensor is used to detect the stacked wood chips so as to blow the stacked wood chips away through the air blow pump; Furthermore, a fifth conveying mechanism is provided on the opposite side of the air pump to receive the wood chips blown away by the air pump, and the end of the fifth conveying mechanism is connected to the material receiving conveying mechanism.

4. The automatic feeding system for screening wood chips according to claim 1, characterized in that: The baffle is connected to the first lifting mechanism to adjust the distance between the bottom end of the baffle and the second conveying mechanism.

5. The automatic feeding system for screening wood chips according to claim 1, characterized in that: The discharge end of the first lower slide plate is hinged to the support plate, the other end of the first lower slide plate is hinged to one end of the angle adjustment cylinder, the other end of the angle adjustment cylinder is hinged to the support plate, the support plate is installed on the first traveling vehicle through the second lifting mechanism, and correspondingly, the material receiving and conveying mechanism is installed on the second traveling vehicle through the third lifting mechanism.

6. The automatic feeding system for screening wood chips according to claim 1, characterized in that: The center position of the third lower slide plate is connected to the rotation driving element to adjust the angle of the third lower slide plate.

7. The automatic feeding system for screening wood chips according to claim 1, characterized in that: The first lower slide plate is connected to a vibration motor.

8. An intelligent shavings screening line, characterized in that: The invention comprises an automatic feeding system for screening wood chips as claimed in any one of claims 1 to 7, wherein the discharge end of the third conveying mechanism corresponds to the feed end of the visual intelligent screening system, and the visual screening intelligent selection system comprises a screening lower slide plate, which adopts a transparent plate, and is provided with a 3D laser profile sensor, a first sorting device, a first color mark sensor group, a second sorting device, a second color mark sensor group and a third sorting device in sequence along the conveying direction of the wood chips, wherein the 3D laser profile sensor and the first color mark sensor group are located above the screening lower slide plate, and the second color mark sensor group is located below the screening lower slide plate.

9. The intelligent shavings screening line according to claim 8, characterized in that: The screening lower slide is connected to the angle adjustment mechanism, and the 3D laser profile sensor, the first sorting device, the first color mark sensor group, the second sorting device, the second color mark sensor group and the third sorting device are all connected to the screening lower slide through a bracket; Furthermore, the 3D laser profile sensor, the first color mark sensor group, and the second color mark sensor group are all connected to the bracket via a fourth lifting mechanism.

10. The intelligent shavings screening line according to claim 8, characterized in that: The first sorting device and the second sorting device adopt a mechanical arm, and a vacuum suction cup is provided at the end of the mechanical arm.

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