Bamboo inner joint removing, flattening and shaping production line

Abstract

According to the bamboo inner joint removing, flattening and shaping production line, continuous operation of inner joint removing, flattening and shaping can be conducted on the whole semicircular long bamboo, the inner joints are removed completely without residues, the flattened bamboo chips are free of cracks and nicks, and the dried flattened and shaped bamboo chips are obtained. The bamboo inner joint removing, flattening and shaping production line comprises self-induction bamboo inner joint removing equipment, a guiding device, a flattening device and microwave drying and shaping equipment. Self-induction bamboo inner joint removing equipment comprises a machine body, a cutting part and a telescopic part. An inner gear ring pushing device in the telescopic part pushes an inner gear ring to rotate around the axis, a star gear rotates, and a rack and a telescopic block move in the radial direction, so that the outer edge of a tray makes contact with the tabasheer face of the bamboo wood; cutter bodies of the bent cutters are in sliding contact with the inner wall of the outer edge of the tray under the action of centrifugal force, and cutting edges cut bamboo inner joints and tabasheer. The flattening device comprises a workbench, a radial pressurizing device and a tangential pressurizing device; and in the flattening process, tangential pressurization is conducted on the thickness face of the bamboo wood, and longitudinal cracking of the bamboo wood is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of removing internal nodes and flattening bamboo, and specifically to a production line for removing internal nodes, flattening, and shaping bamboo. Background Art

[0002] Existing bamboo internal node removal and flattening devices are all developed for short bamboo. The short bamboo pieces they select for horizontal flattening are the short bamboo pieces near the root of round bamboo, with a very small taper. When using these conventional devices, it is necessary to remove the internal nodes of round bamboo first and then flatten it. The production equipment is not continuous, and it is not suitable for removing internal nodes and flattening long bamboo with a taper. Due to the large taper of long bamboo, the inner diameters at both ends of the bamboo differ by more than 4 cm. Using a method similar to removing the internal nodes of short bamboo is likely to remove bamboo flesh, resulting in a significant decrease in bamboo utilization rate. The bamboo wall thickness also varies greatly along the length, with a difference of 4 - 6 mm, which is not suitable for horizontal flattening. This patent controls the bending knife not to cut the bamboo flesh during the internal node removal process by setting a sensing force and a gradually variable telescopic cutter head, continuously unfolds the bamboo along the length direction without being affected by the change in bamboo wall thickness, and realizes drying, shaping, and continuous production, improving production efficiency. Summary of the Invention

[0003] The present invention provides a production line for removing internal nodes, flattening, and shaping bamboo, which can perform continuous operations of removing internal nodes, bamboo yellow, flattening, and shaping on a whole long semi-circular bamboo along the length direction, without being restricted by the bamboo length, with high operation efficiency, and the internal nodes are removed cleanly without residue, and the flattened bamboo slices have no cracks and scratches, improving the bamboo utilization rate, and flat and shaped bamboo slices after drying can be obtained.

[0004] To achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0005] The production line for removing internal nodes, flattening, and shaping bamboo includes a self-sensing bamboo internal node removal device, a flattening device, and a power roller device.

[0006] The power roller device is used to drive the softened semi-circular long bamboo along the axis to move forward from back.

[0007] The self-sensing bamboo internal node removal device includes a machine body, a power roller device, a cutting part, and a telescopic part.

[0008] The flattening device includes a workbench, a radial pressing device, a tangential pressing device, and a conveying system arranged on a frame.

[0009] The power roller device is used to drive the softened bamboo to move forward from back along the axis.

[0010] The machine body includes a disk, a hollow cylinder fixed on the back of the disk. There are three bearing support holes evenly distributed on the same circumference on the disk, and there are three groups of sliders on the back of the disk. The two sliders in each group are parallel to a certain diameter of the disk, and there is a bearing support hole between the two sliders.

[0011] The cutting part includes a tool shaft, a tool disc, a conical tool, an arc-shaped bending tool and a drill bit; the rear part of the tool shaft passes through and is rotatably supported on a hollow cylinder; the front part of the tool shaft successively fixes the drill bit, the conical tool and the tool disc from front to back; the rear end of the tool shaft is connected to a cutting power device arranged on the machine body to drive its rotation;

[0012] The telescopic part includes three sector-shaped telescopic blocks located on the same circumference, three star gears, an internal gear ring and an internal gear ring pushing device; when the three telescopic blocks are spliced together, they form a tray, and the inner diameter of the tray formed by the inner arc ends of the three sector-shaped telescopic blocks is larger than the outer diameter of the hollow cylinder; the outer arc end of the telescopic block has an outer edge extending axially along the tray and exceeding the front surface of the telescopic block, and a set of sliding grooves is provided on the front surface of each telescopic block opposite to the back surface of the disc, and each set has two sliding grooves; each slider is located in the sliding groove and forms a sliding connection with the sliding groove in the radial direction of the disc;

[0013] The bending tool includes a tool body and a tool head fixedly connected; the tool body is in a curved arc shape, the inner end of the tool body close to the tool disc is movably connected to the outer periphery of the tool disc, the outer end of the tool body close to the outer edge of the tray is the tool bottom, when the tool shaft and the tool disc rotate, under the action of centrifugal force, the tool bottom slides in contact with the inner wall of the outer edge of the tray; the tool head is arranged in the axial direction of the tool shaft at the outer end of the tool body and is located at the front end of the outer edge of the tray, in the radial direction of the tool shaft, the cutting edge extends 0.2 - 0.5 mm beyond the outer wall of the outer edge of the tray, and when the bending tool rotates for cutting, it can not only cut the inner joints of the bamboo but also remove the bamboo yellow inside the semi-circular bamboo material;

[0014] A notch is opened on each telescopic block, and the length direction of the notch is the same as a certain diameter direction of the disc; a rack is fixedly installed on one side of the notch wall, and the length of the rack is the same as the length of the notch; the front ends of the three star gear shafts passing through the three notches are supported in the bearing support holes on the disc, star gears are arranged on the star gear shafts, each star gear meshes with a rack, and the three star gears all mesh with the internal gear ring; the internal gear ring is located at the rear part of the tray in the axial direction of the tool shaft;

[0015] The internal gear ring pushing device is connected to the internal gear ring and is used to push the internal gear ring to rotate around the axis;

[0016] When the internal gear ring pushing device acts, it drives the internal gear ring to rotate, the three star gears rotate, and the rack and the telescopic block move along the radial direction, changing the diameter of the outer edge of the tray.

[0017] In the above bamboo inner-joint removing, flattening and shaping production line, the internal gear ring pushing device is a first hydraulic cylinder; the end of the piston rod of the first hydraulic cylinder is hinged to the internal gear ring. When the first hydraulic cylinder pushes the piston rod to work, the hydraulic oil pressure remains unchanged to ensure that the outer peripheral surface of the telescopic disc is closely attached to the bamboo yellow surface.

[0018] In the above bamboo inner-joint removing, flattening and shaping production line, there are at least four bending tools.

[0019] For the above-mentioned bamboo material inner-node removing, flattening and shaping production line, the arc length of the bottom of the knife in the circumferential direction is greater than the maximum circumferential gap between two adjacent expansion blocks in the circumferential direction.

[0020] For the above-mentioned bamboo material inner-node removing, flattening and shaping production line, the bottom of the knife is an arc surface, and the radius of curvature of the arc surface of the bottom of the knife changes from large to small.

[0021] For the above-mentioned bamboo material inner-node removing, flattening and shaping production line, the cross-sections of the sliding block and the sliding groove are trapezoidal, and the sliding block is located in the sliding groove to limit the relative movement between the expansion block and the disc in the axial direction.

[0022] For the above-mentioned bamboo material inner-node removing, flattening and shaping production line, it further includes a pressing device. The pressing device includes at least two pressing oil cylinders arranged on the bamboo green surface in the radial direction of the semi-circular bamboo material. The end of the piston rod of the pressing oil cylinder is provided with a rolling pressing roller. The outer circumference of the pressing roller is in contact with the bamboo green surface, and the rolling axis of the pressing roller is perpendicular to the axis of the bamboo material.

[0023] For the above-mentioned bamboo material inner-node removing, flattening and shaping production line, the pressing roller of the pressing device and the outer edge of the tray are located on the same cross-section of the bamboo material.

[0024] For the above-mentioned bamboo material inner-node removing, flattening and shaping production line, the workbench is of a gradually changing type. Its front end, i.e., the feeding end, is semi-circular arc-shaped, and when extending towards the rear end, i.e., the discharging end, the arc gradually flattens until the discharging end is completely flat; the conveying system for driving the semi-circular long-strip bamboo material after softening and removing the inner nodes of the bamboo to move from the feeding end to the discharging end includes multiple pairs of rollers located above and below the gradually changing workbench and a conveying driving device for driving the lower roller or the upper roller to rotate. Each pair of rollers includes a lower roller and an upper roller; a plurality of openings are arranged on the workbench from front to back. A pair of rollers is arranged above and below each opening position. The concave surface of the bamboo material, i.e., the bamboo yellow surface, is attached to the upper surface of the workbench, and the bamboo material passes through between the lower roller and the upper roller of each pair of rollers and is pressed by the lower roller and the upper roller;

[0025] A plurality of radial pressing devices are arranged on the workbench from front to back. The radial pressing device includes an arc-shaped pressing ring and a plurality of rotating small pressing rollers arranged on the pressing ring. The gap between the small pressing roller and the opposite upper surface of the workbench is not greater than the thickness of the bamboo material; from front to back, the arc of the pressing ring in the radial pressing device also changes from small to large as the arc surface of the workbench changes from small to large;

[0026] A plurality of tangential pressing devices are symmetrically arranged on both sides of the workbench from front to back. The symmetric tangential pressing devices act on the thickness surfaces on both sides of the bamboo material and press the bamboo material in the tangential direction of the arc of the bamboo material to realize the circumferential pressing of the arc-shaped bamboo material together with the workbench.

[0027] In the above-mentioned bamboo inner-node removing, flattening and shaping production line, the outer circumference of the upper roller is a concave arc surface along the direction of its rolling axis, and the outer circumference of the lower roller is a convex arc surface along the direction of its rolling axis. The convex arc surface of the lower roller is flush with the arc surface of the upper surface of the gradient working table. From the feeding end to the discharging end, in each pair of rollers, the bus length of the concave arc surface of the upper roller and the bus length of the convex arc surface of the lower roller gradually increase.

[0028] In the above-mentioned bamboo inner-node removing, flattening and shaping production line, the same pressing ring is formed by connecting multiple small roller shafts. Small rollers are rotatably arranged on each small roller shaft. Both ends of each small roller shaft are respectively hinged on a pressing rod, and an elastic element is arranged between each pressing rod and the machine frame. In the normal state, the elastic element makes each pressing rod and the roller shaft approach the working table, and each small roller presses the bamboo tightly on the working table.

[0029] In the above-mentioned bamboo inner-node removing, flattening and shaping production line, the tangential pressing device includes a hydraulic cylinder II hinged on the machine frame and a side pressing roller II. The end of the piston rod II extending out of the hydraulic cylinder II is provided with a rotatable side pressing roller II. The outer circumference of the side pressing roller II contacts the thickness surfaces on both sides of the bamboo, and the rotation axis of the side pressing roller II is perpendicular to the axis of the bamboo.

[0030] In the above-mentioned bamboo inner-node removing, flattening and shaping production line, a guiding device is further included. The guiding device is between the self-sensing bamboo inner-node removing device and the flattening device. The guiding device includes an upper and lower guiding device and a left and right guiding device. The upper and lower guiding device includes a jacking oil cylinder or an electric cylinder. The end of the piston rod of the jacking oil cylinder or the end of the push rod of the electric cylinder is provided with a rollable jacking roller. The rolling axis of the jacking roller is perpendicular to the axis of the bamboo. The left and right guiding device includes two opposite limiting blocks on the left and right. The upper and lower guiding device is used to jack up the bamboo coming out from the rear end of the self-sensing bamboo inner-node removing device, so that the bamboo yellow surface of the bamboo entering the flattening device contacts the upper surface of the working table. The left and right guiding device makes the bamboo entering the flattening device located directly above the working table.

[0031] In the above-mentioned bamboo inner-node removing, flattening and shaping production line, a microwave heating, drying and shaping device is further included. The microwave heating, drying and shaping device is used to heat and dry the flattened bamboo coming out from the flattening device, so that the bamboo is flattened and shaped.

[0032] In the conveying device of the above-mentioned bamboo inner-node removing, flattening and shaping production line, the outer circumference of the upper roller is a concave arc surface along the direction of its rolling axis, and the outer circumference of the lower roller is a convex arc surface along the direction of its rolling axis. The convex arc surface of the lower roller is flush with the arc surface of the upper surface of the working table. From the feeding end to the discharging end, in each pair of rollers, the bus length of the concave arc surface of the upper roller and the bus length of the convex arc surface of the lower roller gradually increase, and the arc gradually becomes flatter.

[0033] As an improvement, grooves are provided on the concave arc surface of the upper roller in the conveying device, and the extending direction of the grooves is the same as the direction of the rolling axis of the upper roller.

[0034] As an improvement, along the workbench from front to back, the lengths of the openings and each pair of rollers increase in the direction of the roller rolling axis. The lower roller is a driving roller connected to the conveying driving device and is made of heat-resistant rubber or plastic.

[0035] As an improvement, an elastic element is arranged between the pressing ring and the frame. In the normal state, the elastic element makes the pressing ring approach the workbench, and each small pressing roller presses the bamboo material tightly on the workbench.

[0036] As an improvement, the same pressing ring is connected by a plurality of pressing roller shafts, and a rotating small pressing roller is arranged on each pressing roller shaft; both ends of each small pressing roller shaft are respectively hinged on a pressing rod, and an elastic element is arranged between each pressing rod and the frame. In the normal state, the elastic element makes each pressing rod and the pressing roller shaft approach the workbench, and each small pressing roller presses the bamboo material tightly on the workbench and realizes the unfolding of the arc surface of the bamboo material.

[0037] As an improvement, the arc surface at the upper surface of the workbench opposite to each pressing ring is a concentric circle.

[0038] As an improvement, the tangential pressing device further includes an oil pressure detection device for detecting the pressure of the hydraulic oil in the hydraulic cylinder. When the side pressing roller contacts and presses the thickness surfaces on both sides of the bamboo material, the pressure of the hydraulic oil remains unchanged.

[0039] As an improvement, it further includes a photoelectric detection device arranged in front of each tangential pressing device for detecting the chord height of the bamboo material about to enter the workbench where the tangential pressing device is located. The photoelectric detection device is electrically connected to the controller, the controller is electrically connected to the hydraulic valve for controlling the action of the hydraulic cylinder, and a hydraulic valve is arranged on the hydraulic pipeline communicating with the hydraulic cylinder; the controller controls the telescopic movement of the piston rod of the hydraulic cylinder according to the chord height of the bamboo material: when the bamboo material has not reached the workbench where the side pressing roller is located, the piston rod is in the retracted state and will not interfere with the movement of the bamboo material; when the bamboo material reaches the workbench where the side pressing roller is located, the piston rod extends, and the thickness surface of the bamboo material is pressed through the side pressing roller.

[0040] The beneficial effects of the present invention are as follows:

[0041] In the self - sensing bamboo inner - node removing device, the body is fixed and bears the cutting part and the telescopic part. The power roller device drives the softened bamboo to move along the axis from front to back. The internal gear ring pushing device pushes the internal gear ring to rotate around the axis. Then the three star gears rotate, and the rack and the telescopic block move in the radial direction, changing the diameter of the outer edge of the tray, so that the outer periphery of the outer edge of the tray is always in close contact with the bamboo - yellow surface of the semi - circular bamboo with a continuously changing diameter. The cutting power device, such as an electric motor, drives the cutting part to rotate around the axis of the cutter shaft. The drill bit with a smaller diameter at the front in the cutting part first opens a hole in the inner diaphragm (inner node) of the bamboo, and then the conical cutter with a gradually increasing diameter expands the hole. The cutter head drives the curved cutter to make a centrifugal motion. The bottom of the cutter body of the curved cutter slides in contact with the inner wall of the outer edge of the tray under the action of centrifugal force. The cutting edge located in front of the outer edge of the tray in the axial direction of the cutter shaft and protruding from the outer wall of the outer edge of the tray in the radial direction of the cutter shaft can cut the inner node of the bamboo and also remove the bamboo - yellow on the inner wall of the bamboo. Therefore, this self - sensing bamboo inner - node removing device can adapt to the change of the bamboo diameter, enabling the cutting edge of the curved cutter to always cut the inner node and the bamboo - yellow, especially suitable for removing the inner node of the semi - circular bamboo with a longer length.

[0042] The cutter body of the curved cutter is curved, enabling the curved cutter to cut the bamboo - yellow and bamboo nodes even when the diameter of the tray increases. When the cutter head rotates, under the action of centrifugal force, the cutting diameter range of the curved cutter can change with the change of the tray diameter.

[0043] During the process of the bamboo moving from the tip end to the root end to cut the inner node and the bamboo - yellow, thrust control is set for the piston rod one. The pressure of the hydraulic oil in the hydraulic cylinder one that pushes the piston rod one to move remains basically unchanged. When the bamboo moves, the diameter of the inner wall of the bamboo continuously increases. When the contact surface pressure between the outer edge of the tray and the bamboo - yellow surface decreases, the piston rod one pushes the internal gear ring to rotate, driving the three telescopic blocks and the rack to rise, so as to keep the outer wall of the outer edge of the tray always in close contact with the bamboo - yellow surface.

[0044] After the telescopic blocks rise, the outer diameter of the tray composed of the three telescopic blocks increases, and three relatively large gaps appear in the circumferential direction between the telescopic blocks. To ensure that the curved cutter can pass through the circumferential gap smoothly during cutting, the arc length of the cutter bottom in the circumferential direction is greater than the maximum circumferential gap between two adjacent telescopic blocks in the circumferential direction. The radian of the outer end (cutter bottom) of the cutter body is slightly larger than the radian of the inner wall of the outer edge of the tray, preventing a large collision when the bottom of the curved cutter moves from one telescopic block to another.

[0045] When the semi-circular bamboo material without the inner section enters the workbench of the flattening device, in order to prevent the inaccurate position and direction of the bamboo material entering, a guiding device is set up between the inner-section removing device and the flattening device. The guiding device consists of an upper and lower guiding device and a left and right guiding device composed of left and right limit blocks. The upper and lower guiding device controls the height of the bamboo material when it enters the flattening device from the inner-section removing device, ensuring that the entering height of the bamboo material is basically the same as the height above the workbench. The left and right guiding device controls the bamboo material to enter directly above the workbench surface without deviating to the left or right.

[0046] In the flattening device, one end (the bamboo material entering end) of the arc-shaped workbench is semi-circular, and the other end (the bamboo material flattening and discharging end) is flat. From the feeding end to the discharging end, the cross-section of the workbench is gradually changing. There are multiple roller holes on the workbench. Conveyor rollers are arranged above and below each roller hole. The upper roller is located above the workbench and is in the shape of a slender drum. The middle position in its length direction is in a concave arc shape, and the concave arc line is parallel and consistent with the convex arc line on the upper surface of the workbench at the corresponding position. The gap between the concave arc line of the upper roller and the corresponding convex arc shape on the upper surface of the workbench is the wall thickness of the bamboo material. The lower roller is located below the workbench, and the outer circumference of the lower roller passes through the roller hole and is flush with the upper surface of the workbench. When the bamboo material passes through the conveyor rollers, the bamboo green surface is in close contact with the upper roller, and the bamboo yellow surface is in close contact with the lower roller, and the bamboo material will be continuously conveyed to the discharging end.

[0047] When the bamboo material moves with the conveying system, it is pressurized by the radial pressing device and the tangential pressing device. The distance between the small pressing roller in the radial pressing device and the tabletop is the wall thickness of the bamboo material. When the bamboo material passes through the gap between the tabletop and the radial pressing device, it is pressed against the tabletop. As the tabletop changes from a circular shape at the feeding end to a flat shape at the discharging end, the bamboo material is pressed by these two devices and flattened. The transverse tissue strength of the bamboo material is very low. During the flattening process, in order to prevent the bamboo material from being longitudinally cracked due to transverse tension, a tangential pressing device is designed.

[0048] The tangential pressing device performs tangential pressing on the thickness surface of the arc edge of the bamboo material, so that the bamboo material is flattened under the circumferential pressing state to prevent the bamboo material from generating longitudinal cracks.

[0049] After the bamboo material comes out from the discharging end of the flattening device, it enters the microwave heating, drying and shaping equipment under the clamping of the upper and lower parallel conveying rollers. The microwave heating, drying and shaping equipment is a continuous passing-through type equipment, which is provided with microwave emitters, exhaust ducts, etc. The bamboo material enters from one end and comes out from the other end. Through the microwave heating, drying and shaping equipment, the bamboo material is heated, the moisture is evaporated, dried and shaped, and finally the flattened and dried bamboo material is obtained.

[0050] During the process of removing bamboo joints and bamboo yellow, the pressing device and the tray press the bamboo material tightly to prevent the bamboo material from vibrating during the cutting process.

[0051] The blade of the curved knife extends about 0.2 - 0.5 mm beyond the outer periphery of the tray edge. While removing the inner joints, it also shaves off a layer of bamboo yellow on the inner yellow surface of the round bamboo. Due to the limitation of the tray, the blade of the curved knife only extends a very short length beyond the outer periphery of the tray and cannot cut into more bamboo flesh of the bamboo material, which makes it more convenient for the curved knife to accurately shave off the inner joints of the bamboo material.

[0052] A conical knife and a drill are arranged on the knife shaft in front of the cutter head, which can prevent the inner joint from contacting the front end of the cutter head before the curved knife cuts the inner joint.

[0053] The pressing device includes pressing oil cylinders and pressing rollers on both sides of the bamboo green surface. At least two pressing rollers in the pressing device are symmetrically distributed above the bamboo material.

[0054] A pressure controller is provided, and the pressure controller includes a hydraulic valve and a pressure detection device. A hydraulic valve and a pressure detection device for detecting the pressure of the hydraulic oil are arranged on the oil supply pipelines to the pressing oil cylinders, hydraulic cylinder one, and hydraulic cylinder two. The pressure detection device, hydraulic valve, etc. are connected to the controller to ensure that the pressures of the pressing oil cylinders, hydraulic cylinder one, and hydraulic cylinder two remain unchanged during operation.

[0055] Since bamboo materials have large and small ends with a certain taper, the diameter of the bamboo material changes continuously. The two pressing oil cylinders and the tray edge are distributed in a circular plane. By setting the pressure of the pressing oil cylinders, the semi-circular bamboo material will be fixed by at least two pressing rollers and the tray edge, which can prevent the bamboo material from vibrating during the cutting process.

[0056] The outer surface of the tray edge is set as a cone, and the taper of the cone is the same as that of the bamboo yellow surface, so that the tray edge fits better with the bamboo yellow surface.

[0057] The pressure controller can automatically extend and retract the piston rod of the pressing oil cylinder according to the change of the bamboo material diameter, and closely fit the pressing roller on the bamboo green surface.

[0058] The semi-circular whole bamboo material after removing the inner joints and softening is continuously fed into the workbench from the feeding end of the workbench and clamped by a pair of rollers near the feeding end, namely the lower roller and the upper roller. Then, under the action of the upper and lower roller conveying system, the bamboo material moves from front to back along the workbench. During the movement, under the action of the small radial pressure roller, the inner arc surface (the bamboo yellow surface) of the bamboo material always fits the upper surface of the workbench, and the bamboo material is gradually flattened. At the same time, the tangential pressure device applies pressure to the bamboo material along the tangential direction (circumferential direction) of the arc surface of the bamboo material. Since the bamboo yellow surface of the bamboo material will be stretched during the flattening process by the rolling of the small pressure roller and the rollers, in order to prevent excessive stretching and cracking caused by uneven stretching of each point on the arc of the bamboo yellow surface, the tangential pressure plays a role in applying pressure to the circumference of the bamboo arc, that is, applying pressure along the tangential direction of the bamboo arc to compress the bamboo material circumferentially. Since the arc length of the bamboo green surface is greater than that of the bamboo yellow surface, the position of the pressure application point of the tangential pressure device is mainly on the side of the bamboo green surface of the bamboo material. The bamboo green surface will be more compressed, while the bamboo yellow surface will be less compressed, preventing the bamboo yellow surface from cracking due to excessive stretching during the flattening process of the arc-shaped bamboo material.

[0059] The workbench is a non-planar structure. One end (the head end, the feeding end) is semi-circular arc-shaped, and when extending to the other end (the tail end, the discharging end), the arc gradually flattens until it becomes completely planar. A plurality of openings are provided in the workbench. A pair of conveying and rolling rollers are arranged up and down at each opening position. The middle of the upper roller length is a concave arc surface, and grooves are provided on the concave arc surface of the upper roller. The length direction of the grooves is the same as the length direction of the roller (the rolling axis direction) to improve the friction force when conveying the bamboo material. The convex arc surface of the lower roller is flush with the upper surface arc of the workbench. The lower roller is made of heat-resistant rubber or plastic (because the softened bamboo material is in a high-temperature state). The length of the roller at the feeding end is smaller. From the feeding end to the tail end, as the arc of the round bamboo gradually becomes flatter, the length of the roller increases (of course, the length of each opening on the workbench also increases) to increase the friction force on the bamboo material and at the same time increase the pressing force on the flattened surface of the bamboo material.

[0060] The clearance distance between the small pressure roller on the pressure ring and the upper surface of the workbench is not greater than the thickness of the bamboo material, which facilitates the curved bamboo material to pass through the clearance and can apply a certain pressure to the bamboo material to make it fit the workbench, realizing the gradual unfolding of the arc surface of the bamboo material. The radian of the pressure ring at different front and rear positions above the workbench also changes like the radian of the workbench, but the arc surface at the upper surface of the workbench opposite each pressure ring is a concentric circle, and the small pressure roller and the workbench together play a restrictive role on the arc of the bamboo material. When the bamboo material passes through the clearance from the arc end (feeding end) of the workbench to the tail end, it will change with the change of the arc between the arc surface of the workbench and the small pressure roller on the pressure ring, and finally be pressed and unfolded into a flat shape. The pressure ring can apply pressure to bamboo materials with different diameters, so that the bamboo material is pressed and attached to the arc-shaped workbench as soon as it enters the workbench, making the bamboo material in an unfolded state. Due to the thickness difference of the bamboo wall, the wall of the small end of the bamboo material near the bamboo tip is thin, and the wall of the large end of the bamboo material near the bamboo root is thick. If the clearance distance remains unchanged, the radial pressure on the bamboo material will change with the change of the bamboo material thickness. It is possible that the thinner-walled bamboo material does not receive radial pressure. Therefore, elastic elements such as springs are installed on the radial pressure device to adjust the clearance size, enabling radial pressure on the thin-walled bamboo material so that the thin-walled bamboo material can also fit well on the changing workbench.

[0061] The bamboo material also has a taper. The diameter and chord height of the bamboo material change with the length. The arc length and chord height of the part near the bamboo root are large, while the arc length and chord height of the part near the bamboo tip are small. In order to be able to apply an effective tangential force to the side (thickness surface) of the bamboo material, a pressure controller is also set for the hydraulic cylinder 2 of the tangential pressure device. When the arc diameter of the bamboo material is large, the length of the piston rod 2 extending out is short, and vice versa, the extending length is longer. The pressure controller can sense the pressure change according to the change of the chord height of the bamboo material arc contacted by the side pressure roller 2 and control the piston rod 2 of the hydraulic cylinder 2 to expand and contract, realizing continuous and effective tangential pressure on the bamboo wall.

[0062] The diameters of different bamboo materials are all changing. When a bamboo material passes through a certain tangential pressure device, at the position where the next bamboo material is about to pass through this device, due to the different diameters of the bamboo materials and different chord heights, in order not to prevent the next bamboo material from moving to the position of the workbench where this tangential pressure device is located and passing through smoothly, it is required that the tangential pressure device can be lifted (retracted) in advance in time. And after the next bamboo material moves to the workbench where this tangential pressure device is located, the tangential pressure device can quickly press up to apply pressure to the side (thickness surface) of the bamboo material. Therefore, an optoelectronic detection device for detecting the chord height of the bamboo material about to enter the front end of the workbench is set in front of the front end of the workbench. The controller controls the expansion and contraction of the piston rod 2 of the hydraulic cylinder 2 according to the chord height of the bamboo material. Optoelectronic detection devices are also provided in front of other tangential pressure device positions, with the same purpose. The descent and pressing-up times are set for each tangential pressure device, so that the tangential pressure devices at different positions can contract in sequence and then quickly press up.

[0063] Not all of the tangential pressure devices are arranged vertically upward. The pressure directions of the tangential pressure devices at different positions change with the arc of the workbench. From the feeding end, the pressure is applied vertically to the bamboo vertically, and at the discharging end, as the arc of the bamboo slices gradually becomes flat, the pressure device is also approximately horizontally placed, and the pressure on the bamboo is approximately horizontal.

[0064] The conveying device is composed of multiple pairs of upper and lower rollers. The length direction of the upper rollers is concave arc-shaped. The arc of the concave arc surface of the upper roller near the feeding end of the workbench is the largest, and the arc of the concave arc surface of the upper roller at different positions from the feeding end to the discharging end gradually becomes flat. The lower rollers are high-temperature resistant elastic rubber or plastic rollers. The gap between the lower rollers and the upper rollers is the thickness of the bamboo. The length of the rollers at different positions from the feeding end to the discharging end is continuously increased.

[0065] The softening of bamboo is a conventional technology, and the softening temperature and time are well-known. After softening, it is more convenient to remove the internal nodes of the bamboo and flatten it.

[0066] After the bamboo comes out from the discharging end of the flattening device, it enters the microwave heating and drying and shaping equipment under the clamping of the upper and lower parallel conveying rollers. The microwave heating and drying and shaping equipment is a continuous passing type equipment. The bamboo enters from one end and comes out from the other end. Through the microwave heating and drying and shaping equipment, the bamboo is heated, the moisture is evaporated, dried and shaped, and finally the flattened and dried bamboo is obtained.

[0067] The present invention can continuously remove the internal nodes of the semi-circular whole long bamboo without cracks, unfold, dry and shape it, improve the utilization rate of bamboo, and the process is continuous, can be mechanized, has high operation efficiency, and reduces the manual workload. The internal nodes of the bamboo are removed cleanly without residue, and at the same time, the loss of bamboo flesh is small and the utilization rate of bamboo is high. Description of the Drawings

[0068] Figure 1 It is a schematic diagram of the production line for removing internal nodes, flattening and shaping bamboo.

[0069] Figure 2 It is a schematic diagram of the self-induction equipment for removing internal nodes of bamboo.

[0070] Figure 3 It is the front view of the internal gear ring, rack, star gear, etc.

[0071] Figure 4 is Figure 3 side view of

[0072] Figure 5 、 6 are different three-dimensional views of the tray composed of three telescopic blocks, etc.

[0073] Figure 7 、 8 are the front and rear views of the tray composed of three telescopic blocks, etc.

[0074] Figure 9 are schematic diagrams of telescopic blocks and the like.

[0075] Figure 10 is Figure 9 the A-A sectional view of

[0076] Figure 11 is a three-dimensional view of the body and the like.

[0077] Figure 12 is the front view of the cutting part.

[0078] Figure 13 is Figure 12 the side view of

[0079] Figure 14 is the three-dimensional view of the cutting part.

[0080] Figure 15 is a schematic diagram of the contact between the curved knife and the inner wall of the outer edge of the tray.

[0081] Figure 16 is a schematic diagram of the flattening device when flattening bamboo.

[0082] Figure 17 is a schematic diagram of a radial pressing device, a lower roller, an upper roller and the like.

[0083] Figure 18 is a schematic diagram of another radial pressing device, a lower roller, an upper roller and the like.

[0084] Figure 19 is a schematic diagram of a self-inductive bamboo node removing device, a guiding device, a flattening device and the like.

[0085] In the figure, the flattening device 100, the workbench 1, the feeding end 11, the discharging end 12,

[0086] the radial pressing device 2, the pressing ring 21, the small pressing roller 22, the pressing roller shaft 23, the pressing rod 24, the spring 25,

[0087] the tangential pressing device 3, the hydraulic cylinder two 31, the piston rod two 32, the side pressing roller two 33,

[0088] the conveying system 4, the lower roller 41, the upper roller 42, the concave arc surface 44 of the upper roller,

[0089] the frame 16,

[0090] the bamboo 1000, the bamboo thickness surface 1001,

[0091] the self-inductive bamboo node removing device 500,

[0092] the power roller device 5, the roller 51,

[0093] Machine body, disc 55, bearing support hole 551, slider 552; hollow cylinder 56,

[0094] Cutting part 6, tool shaft 61, tool disc 62, curved tool 63, tool body 631, tool bottom 6312, tool tip 632, cutting edge 6321, conical tool 65, drill bit 66,

[0095] Pressing device 7, pressing oil cylinder 71, pressing roller 72,

[0096] Telescopic part 8, tray 80, telescopic block 81, outer edge of tray 811, chute 812, notch 813, star gear 82, star gear shaft 83, internal gear ring 84, rack 85, hydraulic cylinder 1 86, piston rod 1 861;

[0097] Guiding device 9, lifting oil cylinder 91, lifting roller 92, limit block 93

[0098] Microwave heating, drying and shaping equipment 800, conveying roller 801. Specific embodiments

[0099] The following further describes the specific embodiments of the present invention with reference to the accompanying drawings:

[0100] See Figure 11 , the bamboo inner node removing and flattening and shaping production line is composed of a self - induction bamboo inner node removing equipment 500, a guiding device 9, a flattening device 100, and a microwave drying and shaping equipment 800.

[0101] See Figures 8 - 10 , the self - induction bamboo inner node removing equipment 500 mainly includes a machine body, a power roller device 5, a cutting part 6, a pressing device 7, and a telescopic part 8.

[0102] The power roller device 5 is used to drive the softened bamboo along the axis from front to back; the power roller device 5 includes a plurality of rotatable drums 51 that are spaced on the frame and support the bottom of both sides of the semi - circular bamboo 1000 with the bamboo yellow surface facing down, so as to drive the softened bamboo 1000 along the axis from front to back.

[0103] The machine body includes a disc 55 and a hollow cylinder 56 fixed on the back of the disc. There are three bearing support holes 551 evenly distributed on the same circumference on the disc. There are three groups of sliders on the back of the disc. The two sliders 552 in each group are parallel to a certain diameter of the disc, and there is a bearing support hole 551 between the two sliders;

[0104] The cutting part 6 includes a tool shaft 61, a tool disc 62, a conical tool 65, a curved tool 63 and a drill bit 66; the rear part of the tool shaft 61 passes through and is rotatably supported on the hollow cylinder 56; the front part of the tool shaft is successively fixed with the drill bit 66, the conical tool 65 and the tool disc 62 from front to back; the rear end of the tool shaft is connected to a cutting power device arranged on the machine body to drive its rotation.

[0105] The curved tool 63 includes a tool body 631 and a tool head 632 which are fixedly connected. The tool body 631 is in a curved arc shape. The inner end of the tool body near the tool disc is hinged to the outer periphery of the tool disc. The outer end of the tool body near the outer edge of the tray is the tool bottom 6312. When the tool shaft 61 and the tool disc 62 rotate, under the action of centrifugal force, the tool bottom 6312 slides in contact with the inner wall of the outer edge 811 of the tray; the cutting edge of the tool head is in the axial direction of the tool shaft and is located at the front end of the outer edge 811 of the tray. In the radial direction of the tool shaft, the cutting edge extends 0.2 - 0.5 mm beyond the outer wall of the outer edge of the tray.

[0106] The telescopic part 8 includes three sector-shaped telescopic blocks 81 located on the same circumference, three star gears 82, an internal gear ring 84 and an internal gear ring pushing device; when the three telescopic blocks 81 are spliced together circumferentially, they form a tray (telescopic disc) 80. The diameter of the inner hole of the tray formed by the inner arc ends of the three sector-shaped telescopic blocks 81 is larger than the outer diameter of the hollow cylinder 56; the outer arc ends of the telescopic blocks 81 have an outer edge (i.e., the outer edge 811 of the tray) extending axially beyond the front face of the telescopic block along the axial direction of the tray. A set of sliding grooves, each set having two sliding grooves 812, is provided on the front face of each telescopic block 81 opposite to the back face of the disc; each slider is located in the sliding groove 812 and forms a sliding connection with the sliding groove in the radial direction of the disc.

[0107] A notch 813 is formed in each telescopic block 81. The length direction of the notch 813 is consistent with a certain diameter direction of the disc; a rack 85 is fixedly installed on one side of the notch wall. The length of the rack 85 is the same as the length of the notch; the front ends of the three star gear shafts 83 passing through the three notches 813 are rotatably supported in the bearing support holes 551 on the disc through bearings. The star gears 82 are fixed on the star gear shafts 83. Each star gear 82 meshes with a rack 85 in the part axially close to the telescopic block, and the three star gears 82 all mesh with the internal gear ring 84 in the part axially close to the internal gear ring; the internal gear ring 84 is located at the rear of the tray in the axial direction of the tool shaft.

[0108] The machine body is fixed on the frame. The internal gear ring pushing device is a hydraulic cylinder 86; the cylinder body of the hydraulic cylinder 86 is hinged on the frame 16. The end of the piston rod 861 of the hydraulic cylinder 86 is hinged to the internal gear ring 84. When the hydraulic cylinder 86 drives the piston rod 861 to work, the hydraulic oil pressure of the hydraulic cylinder remains unchanged. The piston rod 861 drives the internal gear ring 84 to rotate, the three star gears 82 rotate, and the racks 85 and the telescopic blocks 81 move in the radial direction, changing the diameter of the outer edge 811 of the tray.

[0109] The arc length of the bottom of the knife 6312 in the circumferential direction is greater than the maximum circumferential gap between two adjacent expansion blocks 81 in the circumferential direction.

[0110] The bottom of the knife 6312 is an arc surface, and the radius of curvature of the arc surface of the bottom of the knife 6312 changes from large to small.

[0111] The cross-sections of the slider and the chute 812 are trapezoidal. The slider is located in the chute 812 to restrict the relative movement of the expansion block 81 and the disc in the axial direction.

[0112] The pressing device 7 is used to press the bamboo material 1000 in the radial direction of the bamboo material, so that the bamboo yellow surface of the bamboo material fits against the outer edge 811 of the tray, and both sides of the bottom of the bamboo material 1000 are pressed against the roller 51. The pressing device 7 includes at least two pressing oil cylinders 71 arranged on both sides of the bamboo green surface in the radial direction of the bamboo material. The cylinder body of the pressing oil cylinder 71 is arranged on the frame. The end of the piston rod of the pressing oil cylinder is provided with a rotatable pressing roller 72 (for example, a fixed bracket is provided at the end of the piston rod of the pressing oil cylinder, the pressing roller shaft is fixed on the bracket, and the pressing roller is rotatably arranged on the pressing roller shaft). The outer circumference of the pressing roller 72 contacts the bamboo green surface, and the rotation axis of the pressing roller 72 is perpendicular to the axis of the bamboo material.

[0113] At least two pressing rollers 72 of the pressing device and the outer edge 811 of the tray are located on the same cross-section of the bamboo material.

[0114] The outer peripheral surface of the outer edge 811 of the tray is a conical surface that is larger at the front and smaller at the back.

[0115] The pressure controller includes a hydraulic valve and a pressure detection device. A hydraulic valve and a pressure detection device for detecting the pressure of the hydraulic oil are arranged on the oil supply pipelines for the pressing oil cylinder 71, the first hydraulic cylinder 86, and the second hydraulic cylinder 31. The pressure detection device, the hydraulic valve, etc. are connected to the controller to ensure that the pressures of the pressing oil cylinder 71, the first hydraulic cylinder 86, and the second hydraulic cylinder 31 remain unchanged during operation.

[0116] See Figure 11 , the guiding device 9 is arranged between the self-sensing bamboo internode removing device 500 and the flattening device 100. The upper and lower guiding devices include a jacking oil cylinder 91 with the cylinder body arranged on the frame, and a rollable jacking roller 92 arranged on the upper part of the piston rod of the jacking oil cylinder 91. The rolling axis of the jacking roller 92 is perpendicular to the axis of the bamboo material; the jacking oil cylinder 91 is used to jack up the bamboo material 1000 coming out from the rear end of the self-sensing bamboo internode removing device, so that the bamboo yellow surface of the bamboo material 1000 entering the front end of the flattening device contacts the upper surface of the workbench. The left and right two limit blocks 93 control the bamboo material to enter directly above the workbench without deviating to the left or right.

[0117] See Figure 11 , 1-5. The flattening device 100 unfolds the entire long semi-circular bamboo material 1000 to increase the utilization area and utilization rate of the bamboo material. It includes a frame 16, on which a progressive workbench 1, a radial pressing device 2, a tangential pressing device 3, a conveying system 4, an optoelectronic travel switch, etc. are provided.

[0118] The front end, i.e., the feeding end 11, of the progressive workbench 1 is semi-circular arc-shaped, and the arc gradually flattens when extending towards the rear end, i.e., the discharging end 12, until the discharging end is completely flat. A plurality of openings 13 are arranged in the middle of the workbench from front to back.

[0119] The conveying system 4 for driving the bamboo material to move from front to back includes multiple pairs of rollers and a conveying driving device for driving the lower roller 41 or the upper roller 42 to rotate. Each pair of rollers includes a lower roller and an upper roller; a pair of rollers is arranged up and down at each opening position. The middle of the outer circumference of the upper roller along its rolling axis direction (length direction) is a concave arc surface 44, and the convex arc surface of the lower roller is flush with the arc surface of the upper surface of the workbench. Grooves are provided on the concave arc surface 44 of the upper roller, and the extending direction of the grooves is the same as the rolling axis direction of the upper roller. The upper roller 42 is preferably in a state of floating up and down and pressing the bamboo material 1000 under the support of an elastic element (such as a spring, etc.). In this way, the gap between the upper roller 42 and the lower roller 41 can better adapt to the thickness change of the bamboo material.

[0120] Along the workbench from front to back, the lengths of the openings 13 and each pair of rollers (the lower roller 41 and the upper roller 42) in the rolling axis direction of the rollers increase. The lower roller 41 is a driving roller connected to the conveying driving device and is made of heat-resistant elastic rubber or heat-resistant plastic.

[0121] The concave (bamboo yellow) surface of the bamboo material 1000 with the inner nodes removed and softened fits with the upper surface (outer convex surface) of the workbench 1, and the bamboo material 1000 passes through between the lower roller 41 and the upper roller 42 in each pair of rollers and is pressed by the lower roller 41 and the upper roller 42. The outer convex (bamboo green) surface of the bamboo material 1000 contacts the concave arc surface 44 of the upper roller 42, and the concave (bamboo yellow) surface of the bamboo material 1000 contacts the convex arc surface of the lower roller 41. In each pair of rollers, the bus length of the concave arc surface 44 of the upper roller 42 and the bus length of the convex arc surface of the lower roller 41 also change. The bus length is the shortest near the feeding end, and as the bamboo material travels from the feeding end to the discharging end, the bus length of the concave arc surface 44 of the upper roller 42 and the bus length of the convex arc surface of the lower roller 41 become longer, and the bus length is the longest near the discharging end.

[0122] A plurality of radial pressing devices 2 are arranged above the workbench from front to back. The radial pressing device includes an arc-shaped pressing ring 21, small pressing rollers 22, pressing roller shafts 23, pressing rods 24, springs 25, etc. The pressing ring 21 is formed by sequentially connecting a plurality of pressing roller shafts 23, and a rotating small pressing roller 22 is arranged on each pressing roller shaft 23; both ends of each pressing roller shaft are respectively hinged on a pressing rod 24. Each pressing rod 24 is slidably connected to the frame 16, and a spring 25 is arranged between each pressing rod and the frame. When in a normal state, the spring 25 makes each pressing rod 24 and the pressing roller shaft 23 approach the upper surface of the workbench, and each small pressing roller 22 presses the bamboo material against the upper surface of the workbench. Each pressing ring is basically arc-shaped, and the arc surface at the upper surface of the workbench opposite to the pressing ring is basically a concentric circle.

[0123] A plurality of tangential pressing devices 3 are symmetrically arranged on both sides of the workbench from front to back. The symmetric tangential pressing devices act on the thickness surfaces at both ends of the arc of the cross-section of the bamboo material, and press the bamboo material in the tangential direction of the arc of the bamboo material. The tangential pressing device 3 includes a second hydraulic cylinder 31 with the lower end of the cylinder body hinged to the frames on both sides of the workbench, a second side pressing roller 33, a pressure controller, etc. The end of the piston rod 32 of the second hydraulic cylinder 31 is rotatably provided with a rotatable second side pressing roller 33 (for example, a second bracket is fixed to the end of the piston rod, the shaft of the second side pressing roller is fixed to the second bracket, and the second side pressing roller is rotatably arranged on the shaft of the second side pressing roller); the outer periphery of the second side pressing roller contacts the thickness surfaces 1001 on both sides of the bamboo material, and the rotation axis of the second side pressing roller is perpendicular to the axis of the bamboo material.

[0124] The photoelectric travel switch serving as the photoelectric detection device is arranged in front of the front end of the workbench and is used to detect the chord height and arrival time of the semi-circular bamboo material 1000 about to enter the front end of the workbench. The photoelectric travel switch is electrically connected to the controller, and the controller is electrically connected to the hydraulic valve that controls the action of the hydraulic cylinder. The controller controls the telescopic movement of the piston rod 32 of the second hydraulic cylinder 31 according to the chord height and arrival time of the semi-circular bamboo material: when the bamboo material 1000 has not reached the workbench where the second side pressing roller 33 is located, the piston rod 32 is in a retracted state and will not interfere with the movement of the bamboo material; when the bamboo material reaches the workbench where the second side pressing roller 33 is located, the piston rod 32 extends, and presses the thickness surface 1001 of the bamboo material through the second side pressing roller 33. When the second side pressing roller 33 contacts and presses the thickness surfaces on both sides of the bamboo material, the hydraulic oil pressure remains unchanged.

[0125] The conveying system includes multiple pairs of rollers and a conveying drive device. Multiple openings are arranged on the workbench from the front (feeding end) to the back (discharging end), and a pair of rollers are arranged above and below each opening position; multiple radial pressure devices are arranged above the workbench from the front to the back, and the pressure ring in the radial pressure device changes from small to large as the arc surface of the workbench changes from small to large, so as to realize the flattening of the arc surface of the bamboo material. The radial pressure device includes an arc-shaped pressure ring and multiple rotating small pressure rollers arranged on the pressure ring. The gap between the small pressure roller and the upper surface of the opposite workbench is not greater than the thickness of the bamboo material; multiple symmetrical tangential pressure devices are arranged on both sides of the gradual workbench from the front to the back, and the tangential pressure devices apply pressure to the thickness surfaces on both sides of the bamboo material along the tangential direction of the bamboo arc, and realize circumferential pressing of the arc bamboo material together with the workbench to prevent the bamboo yellow surface from cracking due to uneven stretching of the arc surface during the flattening process.

[0126] The self-induction inner segment removal equipment consists of a body, a cutting part and a telescopic part.

[0127] The machine body is fixed and carries the cutting part and the telescopic part. The machine body is in the shape of a disc bracket, that is, a combination of a disc and a hollow cylinder. The back of the disc (the side close to the hollow cylinder) is provided with three evenly distributed bearing support holes to support three co-centrically evenly distributed star gear shafts. The centers of the three bearing support holes are on the same circumference. There are also three groups of sliders on the back of the disc, each group of sliders has two, and their cross-section is trapezoidal, parallel to a certain diameter of the disc and distributed on both sides of the bearing support holes. The sliders are the guide support bodies of the telescopic block. Bearings are set in the holes at both ends of the hollow cylinder to support the rotation of the knife shaft.

[0128] The cutting part is composed of a knife shaft, a knife disc, a conical knife, an arc-shaped machete and a drill bit. At least four arc-shaped machetes are connected to the knife disc through a movable connection. The knife shaft connects the knife disc, the conical knife and the drill bit in series. The knife shaft passes through the long hole of the hollow cylinder of the machine body and is fixed by a bearing. The cutting tool part is arranged in front of the disc in the machine body. The drill bit is at the front and the knife disc connected with the machete is at the back. When the bamboo yellow surface of the semicircular bamboo material passes through the tool of the cutting part, the knife shaft drives the knife disc and each tool to rotate. The drill bit first opens a hole on the inner diaphragm of the bamboo material, and then the conical knife expands the hole. The knife disc drives the machete to perform centrifugal motion to completely cut off the bamboo septum and bamboo yellow.

[0129] The telescopic part is composed of three sector-shaped telescopic blocks, three star gears, an internal gear ring, and a piston rod I pushing device. When the three telescopic blocks are spliced together, they form a tray. The outer arc ends of the three telescopic blocks have outer edges that extend axially beyond the front surface of the telescopic blocks along the tray. The diameter of the inner hole of the tray (formed by the inner arc ends of the three sector-shaped telescopic blocks) is larger than the outer diameter of the hollow cylinder in the body. That is to say, the tray is evenly divided into three parts with a radian of 120° along the radial direction from the center of the tray, and each part is a telescopic block. Each front surface (the surface opposite to the back surface of the disc) of the telescopic block is provided with a set of chutes that match a set of sliders. Each set of chutes has two, and they are both trapezoidal cross-sections and parallel to a diameter. The three sets of chutes on the tray are connected to the three sets of sliders on the body in a one-to-one correspondence to form a sliding connection mechanism. Since the body is fixed (i.e., the sliders do not move), the three telescopic blocks can simultaneously perform linear telescopic sliding along the three sliders.

[0130] In addition, three through slots are opened in the three telescopic blocks. The length direction of the slots is consistent with the direction of a certain diameter of the bottom surface of the tray. On one side of the slot wall, a rack is fixedly installed. The width of the rack is equal to the thickness of the bottom of the telescopic block (tray) (it can also be slightly larger), and the length of the rack is consistent with the length of the slot.

[0131] The three star gear shafts passing through the three slots are fixed in the bearing support holes on the back surface of the disc. The star gears arranged on each star gear shaft are simultaneously meshed with a rack and the internal gear ring. The three star gears are evenly distributed in a star shape. Each star gear meshes with a rack to form a pair of gear-rack transmission mechanisms. That is, when the star gear rotates around the star gear shaft, it drives the rack (and the telescopic block) to perform a linear motion. The linear direction of the meshing motion between the star gear and the rack is the radial direction. An internal gear ring is simultaneously sleeved on the outer peripheries of the three star gears and meshed with the internal gear ring. The back surface of the internal gear ring is hinged to the piston rod I. The piston rod I can be pushed to rotate the internal gear ring through thrust control. The internal gear ring then drives the three star gears to rotate. The star gears drive the corresponding racks to perform linear movements. Since the racks are fixed on the telescopic blocks, the racks drive each telescopic block to move along the trapezoidal sliders, thereby realizing the change in the diameter of the tray and the telescoping of the tray.

[0132] During the process of the cutter rotating to cut the inner node and the bamboo yellow, the curved cutter on the cutter head can usually only rotate within the tray (not exceeding the inner diameter of the outer edge of the tray (the outer edge of the telescopic block)), and the inner peripheral wall of the outer edge of the tray limits the rotation range of the curved cutter. In order to enable the curved cutter to cut off the bamboo yellow and the inner node of the bamboo, the curved cutter of the present invention is designed into a cutter body and a cutter head. One end of the cutter body close to the cutter head (the inner end of the cutter body) is movably connected to the outer periphery of the cutter head, and the other end of the cutter body close to the outer edge of the tray (the outer end of the cutter body) is the cutter bottom, and the cutter bottom is an arc surface, and the radius of curvature of the arc surface of the cutter bottom changes from large to small, and is larger than the radius of curvature of the inner wall of the outer edge of the tray. When rotating, the cutter bottom of the curved cutter contacts the arc surface of the inner wall of the outer edge of the tray under the action of centrifugal force. A cutter head is connected to the front surface of the cutter body close to the cutter bottom. In the axial direction of the cutter shaft, the cutter head extends beyond the outer edge of the tray. In the radial direction of the cutter shaft, the cutting edge of the cutter head extends 0.2 - 0.5 mm beyond the outer wall of the outer edge of the tray, which can not only cut the inner node of the bamboo, but also remove the bamboo yellow on the inner wall of the bamboo. In order to enable the curved cutter to cut the bamboo yellow and the bamboo node when the diameter of the tray becomes larger, the cutter body of the curved cutter designed to cut the bamboo yellow is curved. When the cutter head rotates, under the action of centrifugal force, the cutting diameter range of the curved cutter can change with the change of the diameter of the tray.

[0133] During the process of the bamboo moving from the tip end to the root end to cut the inner node and the bamboo yellow, circumferential thrust control is set for the piston rod 1, and the pressure of the hydraulic oil in the hydraulic cylinder 1 that pushes the piston rod 1 to move basically remains unchanged. When the bamboo moves, the diameter of the inner wall of the bamboo continuously increases. When the pressure of the contact surface between the outer edge of the tray and the bamboo yellow surface decreases, the piston rod 1 pushes the internal gear ring to rotate, which drives the three telescopic blocks and the rack to rise, so as to keep the outer wall of the outer edge of the tray tightly attached to the bamboo yellow surface.

[0134] After the telescopic blocks rise, it will cause the outer diameter of the tray composed of the three telescopic blocks to increase. Since the minimum circumference of the tray is fixed, there will be gaps in the arc-shaped wall surface composed of the outer edges of the three telescopic blocks, and there will also be three relatively large gaps in the circumferential direction between the telescopic blocks. The amount of increase in the diameter is basically the same as the increase in the width of the circumferential gap between two adjacent telescopic blocks in the circumferential direction (because the arc length is 3.14 times the diameter). In order to ensure that the curved cutter can smoothly pass through the circumferential gap during cutting, the radian of the contact arc surface between the outer end (cutter bottom) of the cutter body and the inner wall of the outer edge of the tray is set to be slightly larger than the radian of the arc surface of the inner wall of the outer edge of the tray, so as to prevent large collisions when the bottom of the curved cutter moves from one telescopic block to another. By setting the arc surface of the outer end (cutter bottom) of the cutter body to be gentle and the (circumferential) length (arc length) to be greater than the maximum circumferential gap (arc length) between the telescopic blocks, it can smoothly pass through the circumferential gap between the telescopic blocks.

[0135] When the semi-circular bamboo material without the inner section enters the workbench of the flattening device, in order to prevent the inaccurate position and direction of the bamboo material from entering, a guiding device is set up between the inner-section removing device and the flattening device. The guiding device consists of an upper and lower guiding device and a left and right guiding device composed of left and right limit blocks. The upper and lower guiding device controls the height of the bamboo material when it enters the flattening device from the inner-section removing device, ensuring that the height of the bamboo material entering is basically the same as the height above the workbench. The left and right guiding device controls the bamboo material to enter directly above the workbench surface without deviating to the left or right.

[0136] The flattening device consists of an arc-shaped workbench, a conveying system, a radial pressing device, and a tangential pressing device.

[0137] One end of the arc-shaped workbench (the bamboo material inlet end) is semi-circular, and the other end (the bamboo material flattening outlet end) is flat. From the inlet end to the outlet end, the cross-section of the workbench is gradually changing. There are multiple roller holes on the workbench. Conveyor rollers are arranged above and below each roller hole. The upper roller is located above the workbench and is in the shape of a slender drum. The middle position in its length direction is in a concave arc shape, and the concave arc is parallel and consistent with the convex arc on the upper surface of the workbench at the corresponding position. The gap between the concave arc of the upper roller and the corresponding convex arc on the upper surface of the workbench is the wall thickness of the bamboo material; the lower roller is located below the workbench, and the outer circumference of the lower roller passes through the roller hole and is flush with the upper surface of the workbench. When the bamboo material passes through the conveyor rollers, the bamboo green surface is in close contact with the upper roller, and the bamboo yellow surface is in close contact with the lower roller, and the bamboo material will be continuously conveyed to the outlet end.

[0138] When the bamboo material moves with the conveying system, it is pressurized by the radial pressing device on the bamboo green surface and the tangential pressing device. The radial pressing device is an arc structure composed of multiple small pressing rollers hinged together. The arc is parallel to the upper surface of the workbench at the corresponding position. The distance between the small pressing roller and the tabletop is the wall thickness of the bamboo material. When the bamboo material passes through the gap between the tabletop and the radial pressing device, it is pressed against the tabletop. As the tabletop changes from a circular shape at the inlet end to a flat shape at the outlet end, the bamboo material is pressed by these two devices and flattened. The transverse tissue strength of the bamboo material is very low. During the flattening process, in order to prevent the bamboo material from being longitudinally cracked due to transverse tension, a tangential pressing device is designed.

[0139] The tangential pressing device consists of a second hydraulic cylinder, a second side pressing roller, a photoelectric inductor (photoelectric detection device), and a pressure controller. The piston rod of the second hydraulic cylinder is tangential to the upper surface of the workbench and is closely attached to the upper surface of the workbench. When the bamboo material reaches the position of the tangential device, the tangential pressing device performs tangential pressing on the thickness surface of the arc edge of the bamboo material, so that the bamboo material is flattened under the circumferential pressing state to prevent the bamboo material from being longitudinally cracked.

[0140] After the semi-circular bamboo material comes out from the discharge end of the flattening device 100, it enters the microwave heating and drying and shaping equipment 800 under the clamping of the upper and lower parallel conveying rollers 801. The microwave heating and drying and shaping equipment 800 is a continuous passing type equipment, which is provided with microwave emitters, exhaust ducts, etc. The bamboo material enters from one end and comes out from the other end. The bamboo material is heated, the moisture is evaporated, dried and shaped through the microwave heating and drying and shaping equipment, and finally the flattened and dried bamboo material is obtained.

[0141] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention is subject to the claims, and any substitutions, deformations, and improvements that are easily conceivable by those skilled in the art made to this technology fall within the protection scope of the present invention.

Claims

1. Bamboo inner node removal, flattening and shaping production line, characterized in that: It includes a self-inductive bamboo internode removing device, a flattening device, and a power roller device. The power roller device is used to drive the softened semi-circular long bamboo along the axis from front to back. The self-inductive bamboo internode removing device includes a machine body, a power roller device, a cutting part, and a telescopic part. The flattening device includes a workbench, a radial pressing device, a tangential pressing device, and a conveying system arranged on the frame. The machine body includes a disc and a hollow cylinder fixed on the back of the disc. There are three bearing support holes evenly distributed on the same circumference of the disc. There are three groups of sliders on the back of the disc. The two sliders in each group are parallel to a certain diameter of the disc, and there is a bearing support hole between the two sliders. The cutting part includes a cutter shaft, a cutter disc, a conical cutter, an arc-shaped bending cutter, and a drill bit. The rear part of the cutter shaft passes through and is rotatably supported on the hollow cylinder. The front part of the cutter shaft is successively fixed with a drill bit, a conical cutter, and a cutter disc from front to back. The rear end of the cutter shaft is connected to a cutting power device arranged on the machine body to drive its rotation. The telescopic part includes three sector-shaped telescopic blocks located on the same circumference, three star gears, an internal gear ring, and an internal gear ring pushing device. When the three telescopic blocks are spliced together, they form a tray. The inner diameter of the tray formed by the inner arc ends of the three sector-shaped telescopic blocks is larger than the outer diameter of the hollow cylinder. The outer arc end of the telescopic block has an outer edge extending axially beyond the front of the telescopic block along the tray. A set of chutes is provided on the front of each telescopic block opposite to the back of the disc. Each set has two chutes. Each slider is located in the chute and forms a sliding connection with the chute in the radial direction of the disc. The bending cutter includes a cutter body and a cutter head fixedly connected. The cutter body is in a bent arc shape. The inner end of the cutter body near the cutter disc is movably connected to the outer circumference of the cutter disc. The outer end of the cutter body near the outer edge of the tray is the cutter bottom. When the cutter shaft and the cutter disc rotate, under the action of centrifugal force, the cutter bottom slides in contact with the inner wall of the outer edge of the tray. The cutter head is arranged at the outer end of the cutter body and is in the same axial direction as the cutter shaft. The cutting edge extends beyond the front end of the outer edge of the tray. In the radial direction of the cutter shaft, the cutting edge extends beyond the outer wall of the outer edge of the tray by 0.2 - 0.5 mm. The cutting edge can remove the bamboo yellow while removing the internode. A notch is opened on each telescopic block. The length direction of the notch is the same as a certain diameter direction of the disc. A rack is fixedly installed on one side of the notch wall. The length of the rack is the same as the length of the notch. The front ends of the three star gear shafts passing through the three notches are supported in the bearing support holes on the disc. Star gears are arranged on the star gear shafts. Each star gear meshes with a rack, and the three star gears all mesh with the internal gear ring. The internal gear ring is located at the rear of the tray in the axial direction of the cutter shaft. The internal gear ring pushing device is connected to the internal gear ring and is used to push the internal gear ring to rotate around the axis. When the internal gear ring pushing device acts, it drives the internal gear ring to rotate. The three star gears then rotate, and the rack and the telescopic block move in the radial direction, changing the diameter of the outer edge of the tray.

2. The flattened and shaped production line for removing inner joints of bamboo materials according to claim 1, characterized in that: The internal gear ring pushing device is a hydraulic cylinder 1. The end of the piston rod 1 of the hydraulic cylinder 1 is hinged to the internal gear ring. When the hydraulic cylinder 1 pushes the piston rod 1 to work, the hydraulic oil pressure remains unchanged.

3. The bamboo inner-node removing, flattening and shaping production line according to claim 1, characterized in that: The arc length of the cutter bottom in the circumferential direction is greater than the maximum circumferential gap between two adjacent telescopic blocks in the circumferential direction.

4. The bamboo inner-node removing, flattening and shaping production line according to claim 1, wherein: It further includes a pressing device which comprises at least two pressing oil cylinders arranged on the bamboo green surface in the radial direction of the semi-circular bamboo material. A rolling pressing roller is provided at the end of the piston rod of the pressing oil cylinder. The outer periphery of the pressing roller contacts with the bamboo green surface, and the rolling axis of the pressing roller is perpendicular to the axis of the bamboo material.

5. The bamboo material inner node removing, flattening and shaping production line according to claim 1, characterized in that: The workbench is a gradually changing arc surface. Its front end, i.e., the feeding end, is semi-circular arc-shaped, and when extending towards the rear end, i.e., the discharging end, the arc gradually flattens until the discharging end is completely flat. The conveying system for driving the bamboo material after softening and inner node removing to move from the feeding end to the discharging end includes multiple pairs of rollers located above and below the gradually changing workbench and a conveying driving device for driving the lower rollers or the upper rollers to rotate. Each pair of rollers includes a lower roller and an upper roller. A plurality of openings are provided on the workbench from front to back. A pair of rollers is arranged above and below each opening position. The concave surface of the bamboo material, i.e., the bamboo yellow surface, fits with the upper surface of the workbench, and the bamboo material passes through between the lower roller and the upper roller of each pair of rollers and is pressed by the lower roller and the upper roller. A plurality of radial pressing devices are arranged on the workbench from front to back. The radial pressing device includes an arc-shaped pressing ring and a plurality of rotating small pressing rollers arranged on the pressing ring. The gap between the small pressing roller and the opposite upper surface of the workbench is not greater than the thickness of the bamboo material. From front to back, the arc of the pressing ring in the radial pressing device gradually increases as the arc surface of the workbench changes from small to large. A plurality of tangential pressing devices are symmetrically arranged on both sides of the workbench from front to back. The symmetric tangential pressing devices act on the thickness surfaces on both sides of the bamboo material and press the bamboo material in the tangential direction along the arc of the bamboo material, together with the workbench, to realize the circumferential pressing of the arc-shaped bamboo material.

6. The bamboo inner-node removing, flattening and shaping production line according to claim 5, characterized in that: The outer periphery of the upper roller is a concave arc surface along its rolling axis direction, and the outer periphery of the lower roller is a convex arc surface along its rolling axis direction. The convex arc surface of the lower roller is flush with the arc surface of the upper surface of the gradually changing workbench. From the feeding end to the discharging end, in each pair of rollers, the bus length of the concave arc surface of the upper roller and the bus length of the convex arc surface of the lower roller gradually increase.

7. The bamboo inner-node removing, flattening and shaping production line according to claim 5, characterized in that: The same pressing ring is formed by connecting a plurality of small roller shafts. A small pressing roller is rotatably arranged on each small roller shaft. Both ends of each small roller shaft are respectively hinged on a pressing rod, and an elastic element is arranged between each pressing rod and the frame. In the normal state, the elastic element makes each pressing rod and the roller shaft approach the workbench, and each small pressing roller presses the bamboo material on the workbench.

8. The flattening and shaping production line for bamboo materials for removing inner joints according to claim 5, characterized in that: The tangential pressing device includes a hydraulic cylinder II hinged on the frame and a side pressing roller II. A rotatable side pressing roller II is provided at the end of the piston rod II extending out of the hydraulic cylinder II. The outer periphery of the side pressing roller II contacts with the thickness surfaces on both sides of the bamboo material, and the rotation axis of the side pressing roller II is perpendicular to the axis of the bamboo material.

9. The bamboo inner-node removing, flattening and shaping production line according to claim 5, characterized in that: It further includes a guiding device which is arranged between the self-sensing bamboo internode removing device and the flattening device. The guiding device includes an upper and lower guiding device and a left and right guiding device. The upper and lower guiding device includes a lifting oil cylinder or an electric cylinder. A rolling lifting roller is arranged at the end of the piston rod of the lifting oil cylinder or at the end of the push rod of the electric cylinder. The rolling axis of the lifting roller is perpendicular to the axis of the bamboo. The left and right guiding device includes two opposite limiting blocks on the left and right. The upper and lower guiding device is used to lift the bamboo coming out from the rear end of the self-sensing bamboo internode removing device upward, so that the yellow side of the bamboo entering the flattening device contacts the upper surface of the workbench. The left and right guiding device makes the bamboo entering the flattening device located directly above the workbench.

10. The bamboo inner-node removing, flattening and shaping production line according to claim 5, characterized in that: It further includes a microwave heating drying and shaping device which is used to heat and dry the flattened bamboo coming out from the flattening device, so that the bamboo is flattened and shaped.

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