Bamboo material inner node flattening and setting production line

Abstract

The present application provides a bamboo internal node removal and flattening and shaping production line, which can perform continuous operations of internal node removal, flattening and shaping on whole bamboo with semicircular shape, and can remove the internal node completely without residue, flatten the bamboo piece without cracking and notch, and obtain dry and flat and shaped bamboo piece. The bamboo internal node removal and flattening and shaping production line comprises a self-induction bamboo internal node removal device, a guide device, a flattening device and a microwave drying and shaping device. The self-induction bamboo internal node removal device comprises a machine body, a cutting part and an extension part. The inner gear ring pushing device in the extension part pushes the inner gear ring to rotate around the axis, the star gear rotates, the rack and the extension block move in the radial direction, so that the outer edge of the tray is in contact with the bamboo yellow surface of the bamboo; the cutter body of the bending cutter is in sliding contact with the inner wall of the outer edge of the tray under the action of centrifugal force, and the cutting edge cuts the internal node and the bamboo yellow of the bamboo. The flattening device comprises a workbench, a radial pressing device and a tangential pressing device; the tangential pressing is performed on the thickness surface of the bamboo during the flattening process to prevent longitudinal cracking of the bamboo.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bamboo internal node removal and flattening, and particularly relates to a bamboo internal node removal and flattening setting production line. BACKGROUND

[0002] The existing bamboo internal node removal and flattening devices are developed for short bamboo, and the transverse flattening bamboo selected by the devices is short bamboo near the root of round bamboo, and the sharpness is very small. The conventional devices need to remove the internal node of the round bamboo before flattening, and the production equipment is discontinuous, and is not suitable for the internal node removal and flattening of long bamboo with sharpness. Since the sharpness of the long bamboo is large, the internal diameter of the two ends of the bamboo is different by more than 4 cm, and the method of removing the internal node of the short bamboo is easy to remove the bamboo flesh, resulting in a great decrease in the utilization rate of the bamboo, and the thickness of the bamboo wall changes greatly in length, and the thickness difference is 4-6 mm, which is not suitable for transverse flattening. The patent is provided with an induction force and a gradually changing telescopic cutter head, controls the bending cutter not to cut the bamboo flesh during the internal node removal, continuously expands the bamboo along the length direction without being affected by the thickness change of the bamboo wall, and realizes the drying and setting flow production, and improves the production efficiency. SUMMARY

[0003] The present application provides a bamboo internal node removal and flattening setting production line, which can perform the internal node removal, bamboo yellow, flattening and setting continuous operation on the whole long bamboo in the length direction, is not limited by the length of the bamboo, has high operation efficiency, removes the internal node completely without residue, and the flattened bamboo piece has no cracking and notch, improves the utilization rate of the bamboo, and can obtain the dried and flattened bamboo piece.

[0004] To achieve the above technical purposes, the technical scheme adopted by the present application is as follows:

[0005] The bamboo internal node removal and flattening setting production line comprises a self-induction bamboo internal node removal device, a flattening device and a power roller device,

[0006] The power roller device is used for driving the softened semicircular long bamboo to move along the axis from front to back;

[0007] The self-induction bamboo internal node removal device comprises a machine body, the power roller device, a cutting part and a telescopic part;

[0008] The flattening device comprises a workbench arranged on a rack, a radial pressing device, a tangential pressing device and a conveying system;

[0009] The power roller device is used for driving the softened bamboo to move along the axis from front to back;

[0010] The machine body comprises a disc, a hollow cylinder fixed on the back of the disc, three bearing support holes uniformly arranged on the same circumference of the disc, and three groups of sliding blocks on the back of the disc, wherein two sliding blocks in each group are parallel to a diameter of the disc, and there is a bearing support hole between the two sliding blocks.

[0011] The cutting part includes a cutter shaft, a cutter disc, a conical cutter, an arc-shaped curved cutter and a drill bit; the rear part of the cutter shaft is supported on the hollow cylinder and rotates; the front part of the cutter shaft is sequentially fixed with the drill bit, the conical cutter and the cutter disc from front to back; the rear end of the cutter shaft is connected with a cutting power device arranged on the machine body to drive the rotation of the cutter shaft;

[0012] The telescopic part includes three fan-shaped telescopic blocks located on the same circumference, three star gears, an inner gear ring and an inner gear ring pushing device; the three telescopic blocks are spliced together to form a tray, the inner hole of the tray surrounded by the inner arc-shaped ends of the three fan-shaped telescopic blocks has a diameter greater than the outer diameter of the hollow cylinder; the outer arc-shaped end of the telescopic block has an outer edge extending along the axial direction of the tray beyond the front surface of the telescopic block, and each telescopic block has a set of sliding grooves on the front surface opposite to the back surface of the disc, each set having two sliding grooves; each sliding block is located in the sliding groove and forms a sliding connection with the sliding groove in the radial direction of the disc;

[0013] The curved cutter includes a fixedly connected cutter body and a cutter head; the cutter body is curved and has an inner end close to the cutter disc and an outer end close to the outer edge of the tray; the inner end of the cutter body is movably connected with the outer periphery of the cutter disc, and the outer end of the cutter body is a cutter bottom which is in sliding contact with the inner wall of the outer edge of the tray under the action of centrifugal force when the cutter shaft and the cutter disc rotate; the cutter head is arranged in the axial direction of the cutter shaft at the outer end of the cutter body and located at the front end of the outer edge of the tray; in the radial direction of the cutter shaft, the cutting edge extends 0.2-0.5mm out of the outer wall of the outer edge of the tray; the curved cutter can not only cut the inner node of the bamboo but also remove the bamboo yellow inside the half-round bamboo material during rotation and cutting;

[0014] A slot is formed in each telescopic block, and the length direction of the slot is consistent with the radial direction of the disc; a rack is fixedly installed on one side of the wall of the slot, and the length of the rack is consistent with the length of the slot; the front end of the three star gear shafts passing through the three slots is supported in the bearing support hole on the disc, and a star gear is arranged on the star gear shaft; each star gear is engaged with a rack, and the three star gears are all engaged with the inner gear ring; the inner gear ring is located at the rear part of the tray in the axial direction of the cutter shaft;

[0015] The inner gear ring pushing device is connected with the inner gear ring and used to drive the rotation of the inner gear ring around the axis;

[0016] The inner gear ring pushing device drives the rotation of the inner gear ring, and the three star gears rotate, and the rack and the telescopic block move in the radial direction, thereby changing the diameter of the outer edge of the tray.

[0017] In the above-mentioned bamboo inner node removal and flattening and shaping production line, the inner gear ring pushing device is a hydraulic cylinder one; the end of the piston rod one of the hydraulic cylinder one is hingedly connected with the inner gear ring; when the hydraulic cylinder one drives the piston rod one to work, the hydraulic oil pressure remains unchanged, thereby ensuring that the outer periphery of the telescopic disc is tightly attached to the bamboo yellow surface.

[0018] In the above-mentioned bamboo inner node removal and flattening and shaping production line, the curved cutter has at least four curved cutters.

[0019] The bamboo inner node removing and flattening production line has a knife bottom with an arc length in the circumferential direction greater than the maximum circumferential gap between two adjacent expansion blocks.

[0020] The bamboo inner node removing and flattening production line has an arc knife bottom with a radius of curvature changing from large to small.

[0021] The bamboo inner node removing and flattening production line has a sliding block and a sliding groove with a trapezoidal cross section, and the sliding block is located in the sliding groove to limit the relative movement of the expansion block and the disc in the axial direction.

[0022] The bamboo inner node removing and flattening production line further comprises a pressing device, which includes at least two pressing cylinders arranged in the radial direction of the semicircular bamboo and located on the bamboo green surface, and a rolling pressing roller is arranged at the end of the piston rod of the pressing cylinder, the outer periphery of the rolling pressing roller is in contact with the bamboo green surface, and the rolling axis of the rolling pressing roller is perpendicular to the axis of the bamboo.

[0023] The bamboo inner node removing and flattening production line has a pressing roller of the pressing device and a tray outer edge located on the same cross section of the bamboo.

[0024] The bamboo inner node removing and flattening production line has a gradually changing workbench, the front end, i.e., the feeding end, is semicircular, and the workbench gradually flattens to a plane at the rear end, i.e., the discharging end; a conveying system for driving the softened and inner node-removed semicircular long bamboo to move from the feeding end to the discharging end includes a plurality of pairs of rollers arranged on the upper and lower gradually changing workbenches 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 arranged on the workbench from front to rear, and a pair of rollers is arranged above and below each opening, the inner concave surface of the bamboo, i.e., the bamboo yellow surface, is attached to the upper surface of the workbench, and the bamboo passes through and is pressed by the lower roller and the upper roller in each pair of rollers.

[0025] A plurality of radial pressing devices are arranged on the workbench from front to rear, and each radial pressing device includes a circular arc pressing ring and a plurality of rotating small pressing rollers arranged on the pressing ring, the gap between the small pressing rollers and the opposite upper surface of the workbench is not greater than the thickness of the bamboo; the arc of the pressing ring in the radial pressing device changes from small to large along with the change of the arc surface of the workbench from small to large.

[0026] A plurality of tangential pressing devices are symmetrically arranged on both sides of the workbench from front to rear, the symmetric tangential pressing devices act on the thickness surfaces on both sides of the bamboo to press the bamboo along the tangential direction of the bamboo arc, and the workbench and the tangential pressing devices together realize the circumferential pressing of the arc bamboo.

[0027] The concave arc surface of the upper roller and the convex arc surface of the lower roller gradually increase from the feeding end to the discharging end.

[0028] The same pressure ring is connected by a plurality of small pressure roller shafts, and a small pressure roller is rotatably arranged on each pressure roller shaft.

[0029] The tangential pressure device comprises a hydraulic cylinder two and a side pressure roller two hinged to the rack, and the side pressure roller two is rotatably arranged at the end of the piston rod two of the hydraulic cylinder two.

[0030] The guiding device comprises an up-and-down guiding device and a left-and-right guiding device.

[0031] The microwave heating and drying device is used for heating and drying the flattened bamboo to make the bamboo flat and fixed.

[0032] The concave arc surface of the upper roller and the convex arc surface of the lower roller gradually increase from the feeding end to the discharging end.

[0033] As an improvement, a groove is arranged on the concave arc surface of the upper roller, and the extension direction of the groove is consistent with the rolling axis direction of the upper roller.

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

[0035] As an improvement, an elastic element is arranged between the compression ring and the frame, which makes the compression ring close to the workbench in the normal state, and each small compression roller compresses the bamboo on the workbench.

[0036] As an improvement, the same compression ring is connected by a plurality of compression roller shafts, and a rotating small compression roller is arranged on each compression roller shaft; the two ends of each small compression roller shaft are respectively hinged to a pressing rod, and an elastic element is arranged between each pressing rod and the frame, which makes each pressing rod and compression roller shaft close to the workbench in the normal state, each small compression roller compresses the bamboo on the workbench, and the expansion of the arc surface of the bamboo is realized.

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

[0038] As an improvement, the tangential compression device further comprises an oil pressure detection device for detecting the hydraulic oil pressure in the hydraulic cylinder, and when the side compression roller is in contact with the thickness surface of the bamboo and exerts pressure, the hydraulic oil pressure remains unchanged.

[0039] As an improvement, the photoelectric detection device is arranged in front of each tangential compression device and is used for detecting the chord height of the bamboo entering the workbench where the tangential compression device is arranged, the photoelectric detection device is electrically connected with the controller, the controller is electrically connected with the hydraulic valve for controlling the action of the hydraulic cylinder, a hydraulic valve is arranged on the hydraulic pipeline communicated with the hydraulic cylinder; the controller controls the extension and retraction of the piston rod of the hydraulic cylinder according to the chord height of the bamboo: when the bamboo does not reach the workbench where the side compression roller is arranged, the piston rod is in the retracted state and does not hinder the movement of the bamboo; when the bamboo reaches the workbench where the side compression roller is arranged, the piston rod is extended and the thickness surface of the bamboo is pressed by the side compression roller.

[0040] The beneficial effects of the present application are:

[0041] In the self-sensing bamboo inner node removing device, the machine body is fixed and bears the cutting part and the telescopic part. The softened bamboo is moved along the axis from front to back by the power roller device. The inner gear ring pushing device pushes the inner gear ring to rotate around the axis, the three star gears rotate, the rack and the telescopic block move in the radial direction, the diameter of the outer edge of the tray is changed, and 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 changing diameter. The cutting power device such as the motor drives the cutting part to rotate around the cutter shaft axis, the drill bit with a smaller diameter at the front of the cutting part first drills a hole on the inner diaphragm (inner node) of the bamboo, and then the tapered cutter with gradually increasing diameter enlarges the hole, the cutter disc drives the bending cutter to make centrifugal motion, and the cutter bottom of the cutter body is in sliding contact with the inner wall of the outer edge of the tray under the action of centrifugal force. The cutting edge located in the front part of the outer edge of the tray in the axial direction of the cutter shaft and extending out of 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 remove the bamboo yellow on the inner wall of the bamboo. Therefore, the self-sensing bamboo inner node removing device can adapt to the change of the diameter of the bamboo, so that the cutting edge of the bending cutter can always cut the inner node and the bamboo yellow, and is especially suitable for removing the inner node of the semi-circular bamboo with a long length.

[0042] The cutter body of the bending cutter is curved, so that the bending cutter can cut the bamboo yellow and the node when the diameter of the tray increases, and the diameter range of the bending cutter cutting can change with the diameter change of the tray under the action of centrifugal force when the cutter disc rotates.

[0043] During the movement of the bamboo from the tip end to the root end to cut the inner node and the bamboo yellow, the piston rod one is provided with a thrust control, and the hydraulic oil pressure in the hydraulic cylinder one pushing the piston rod one to move is basically kept unchanged. When the bamboo moves, the diameter of the inner wall of the bamboo continuously increases, and the contact surface pressure between the outer edge of the tray and the bamboo yellow surface decreases. The piston rod one pushes the inner gear ring to rotate, which drives the three telescopic blocks and the rack to rise, so that the outer edge of the tray is always in close contact with the bamboo yellow surface.

[0044] The outer diameter of the tray composed of the three telescopic blocks will increase after the telescopic blocks rise, and three large gaps will appear between the telescopic blocks in the circumferential direction. In order to ensure that the bending cutter can smoothly pass through the circumferential gap during cutting, the arc length of the cutter bottom in the circumferential direction is greater than the maximum circumferential gap between the two adjacent telescopic blocks in the circumferential direction. The curvature of the outer end of the cutter body (cutter bottom) is slightly larger than that of the inner wall of the outer edge of the tray, so as to prevent large collision when the bending cutter bottom moves from one telescopic block to another telescopic block.

[0045] When the half-circular bamboo material that has been debudded enters the workbench of the flattening device, in order to prevent the bamboo material from entering in an inaccurate position and direction, a guide device is set up between the debudding device and the flattening device, which is composed of an up-down guide device and a left-right guide device with left and right limiting blocks. The up-down guide device controls the height of the bamboo material when it enters the flattening device from the debudding device, so as to ensure that the height of the bamboo material entering is basically consistent with the height above the workbench. The left-right guide device controls the bamboo material to enter the exact above of the workbench, and will not deviate to the left or right.

[0046] In the flattening device, one end (the bamboo material entering end) of the arc-shaped workbench is semicircular, and the other end (the bamboo material flattening discharging end) is flat. From the material entering end to the discharging end, the cross section of the workbench is gradually changed. A plurality of roller holes are opened on the workbench, and conveying rollers are arranged above and below each roller hole. The upper roller is located above the workbench and is in the shape of an elongated cylinder. The middle position of the length direction of the upper roller is in the shape of a concave arc, and the concave arc line is parallel to the convex arc line on the upper surface of the corresponding position of the workbench. 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 periphery of the lower roller is flush with the upper surface of the workbench through the roller hole. When the bamboo material passes through the conveying 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, so that the bamboo material is continuously conveyed to the discharging end.

[0047] When the bamboo material moves along with the conveying system, it is pressed by the radial pressing device and the tangential pressing device. The distance between the small pressing roller in the radial pressing device and the workbench is the wall thickness of the bamboo material. When the bamboo material passes through the gap between the workbench and the radial pressing device, it is pressed and attached to the workbench. With the change of the workbench from the circular shape at the material entering end to the flat shape at the discharging end, the bamboo material is flattened by the pressing of the two devices. The transverse strength of the bamboo material is very low. In order to prevent the bamboo material from being pulled in the transverse direction and causing longitudinal cracking during the flattening process, a tangential pressing device is designed.

[0048] The tangential pressing device performs tangential pressing on the thickness surface of the edge of the bamboo material, so that the bamboo material is flattened in a circumferential pressing state to prevent longitudinal cracking of the bamboo material.

[0049] After the bamboo material comes out of the flattening device, it is clamped by the upper and lower conveying rollers and then enters the microwave heating and drying equipment. The microwave heating and drying equipment is a continuous passing type equipment, which is provided with a microwave emitter and an exhaust duct. The bamboo material enters from one end and comes out from the other end. The microwave heating and drying equipment heats, evaporates water and dries the bamboo material, and finally obtains the flattened and dried bamboo material.

[0050] The pressing device and the tray press the bamboo material during the debudding and bamboo yellow removing process to prevent the bamboo material from vibrating during the cutting process.

[0051] The blade of the bending knife extends outward from the outer edge of the tray by about 0.2-0.5mm, and removes the inner node and a layer of bamboo yellow on the inner side of the round bamboo. Due to the limitation of the tray, the blade of the bending knife only extends a small length from the outer edge of the tray, and it is not possible to cut into more bamboo meat part of the bamboo material, and it is more convenient for the bending knife to accurately remove the inner node of the bamboo material.

[0052] The conical knife and drill bit are arranged on the front shaft of the cutter head, which can prevent the inner node from contacting the front end of the cutter head before the bending knife cuts the inner node.

[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] The pressure controller is provided, which includes a hydraulic valve and a pressure detection device. The hydraulic valve and the pressure detection device for detecting the hydraulic oil pressure are arranged on the oil supply pipeline of the pressing oil cylinder, the first hydraulic cylinder and the second hydraulic cylinder. The pressure detection device, the hydraulic valve and the like are connected with the controller, so as to ensure that the pressure of the pressing oil cylinder, the first hydraulic cylinder and the second hydraulic cylinder is unchanged during work.

[0055] Since the bamboo material has large and small heads, the large and small heads have a certain taper, and the diameter of the bamboo material is continuously changed. The two pressing oil cylinders and the outer edge of the tray are distributed in a circular plane, and the pressure of the pressing oil cylinder is set. The semicircular bamboo material will be fixed by at least two pressing rollers and the outer edge of the tray, which can prevent the bamboo material from vibrating during cutting.

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

[0057] The pressure controller can automatically extend and retract the pressing oil cylinder piston rod according to the change of the diameter of the bamboo material, so as to tightly combine the pressing roller with the bamboo green surface.

[0058] The semi-circular whole node-removed softened bamboo is continuously sent into the workbench from the feeding end of the workbench and clamped by a pair of rollers, i.e. the lower roller and the upper roller, close to the feeding end. Then, under the action of the upper and lower roller conveying system, the bamboo moves along the workbench from front to back. In the moving process, the inner arc surface (the bamboo yellow surface) of the bamboo always adheres to the upper surface of the workbench under the action of the radial pressure small roller, and the bamboo is gradually flattened. At the same time, the tangential pressure device pressurizes the bamboo along the tangential direction (circumferential direction) of the bamboo arc surface. Because the bamboo yellow surface is stretched during the flattening process of the small pressure roller and the roller, in order to prevent the uneven stretching of each point on the arc-shaped bamboo yellow surface from causing excessive stretching and cracking, the tangential pressure plays a role of pressurizing the circumferential direction of the bamboo arc, i.e. pressurizing along the tangential direction of the bamboo arc to compress the bamboo in the circumferential direction. Because the arc length of the bamboo green surface is greater than that of the bamboo yellow surface, the position of the pressurizing point of the tangential pressure device is mainly on the side of the bamboo green surface, and the bamboo green surface will be compressed more, while the bamboo yellow surface will be compressed less, thereby preventing the bamboo yellow surface from cracking due to excessive stretching during the flattening process.

[0059] The workbench is a non-planar structure, one end (the leading end, the feeding end) of which is a semi-circular arc, and the arc gradually flattens to a complete plane when extending to the other end (the tail end, the discharging end). A plurality of openings are arranged in the workbench, and a pair of conveying and rolling rollers is arranged above and below each opening. The length of the upper roller is concave, and a groove is arranged on the concave surface of the upper roller. The length direction of the groove is consistent with the length direction of the roller (the rolling axis direction), so as to improve the friction force when conveying the bamboo. The convex surface of the lower roller is flush with the upper surface of the workbench. The lower roller is made of temperature-resistant rubber or plastic material (because the softened bamboo is in a high temperature state), and the length of the roller at the feeding end is small. From the feeding end to the tail end, the arc of the bamboo gradually flattens, and the length of the roller increases (of course, the length of each opening on the workbench also increases), so as to improve the friction force on the bamboo and increase the pressure on the flattened surface of the bamboo.

[0060] The gap distance between the small press roller on the pressure ring and the upper surface of the workbench is not greater than the thickness of the bamboo, facilitating the arc-shaped bamboo to pass through the gap while exerting a certain pressure on the bamboo to make the bamboo adhere to the workbench, realizing the gradual unfolding of the arc surface of the bamboo. The curvature of the pressure ring at different front and rear positions above the workbench is also variable, but the arc surface at the upper surface of the workbench opposite to each pressure ring is a concentric circle, and the small press roller together with the workbench limits the arc shape of the bamboo. When the bamboo passes through the gap from the circular arc end (feeding end) of the workbench to the tail end, it will change along with the change of the arc shape between the workbench arc surface and the small press roller on the pressure ring, and finally be pressed and unfolded into a plane. The pressure ring can exert pressure on bamboo of different diameters, so that the bamboo is pressed and adhered to the arc-shaped workbench as soon as it enters the workbench, so that the bamboo is in an unfolded state. Because of the thickness difference of the bamboo wall, the small head of the bamboo near the bamboo tip is thin, and the big head of the bamboo near the bamboo root is thick. If the gap distance is constant, the radial pressure on the bamboo will change with the change of the thickness of the bamboo, and it is possible that the thin-walled bamboo does not receive radial pressure, so an elastic element such as a spring is installed on the radial pressure device to adjust the gap size, so that the radial pressure on the thin-walled bamboo can be realized, so that the thin-walled bamboo can also be well adhered to the changing workbench.

[0061] The bamboo also has a sharp degree, and the diameter and chord height of the bamboo change with the length. The arc near the bamboo root is long and the chord height is large, and the arc near the bamboo tip is short and the chord height is small. In order to exert effective tangential force on the side surface (thickness surface) of the bamboo, the hydraulic cylinder two of the tangential pressure device is also provided with a pressure controller. When the diameter of the bamboo arc is large, the length of the piston rod two is short, and vice versa. The pressure controller can control the extension and retraction of the piston rod two according to the change of the pressure sensed by the second side roller contacting the arc chord of the bamboo, realizing continuous and effective tangential pressure on the bamboo wall.

[0062] The diameters of different bamboos are variable. When a bamboo passes through a certain tangential pressure device, the next bamboo will pass through the position of the device. Because the diameters of the bamboos are different, the chord heights of the bamboos are different. In order not to hinder the movement of the next bamboo to the workbench position (place) of the tangential pressure device and pass through smoothly, it is required that the tangential pressure device can be lifted (contracted) in time in advance, and after the next bamboo moves to the workbench position of the tangential pressure device, the tangential pressure device can quickly press to exert pressure on the side surface (thickness surface) of the bamboo. Therefore, photoelectric detection devices for detecting the chord height of the bamboo about to enter the front end of the workbench are arranged in front of the front end of the workbench, and the controller controls the extension and retraction of the piston rod two of the hydraulic cylinder two according to the chord height of the bamboo. Photoelectric detection devices are also provided in front of the positions of other tangential pressure devices, and the purpose is the same. The falling and pressing time of each tangential pressure device is set, so that the tangential pressure devices at different positions can be sequentially contracted and then quickly pressed.

[0063] The tangential pressing device is not all arranged vertically upward, and the pressing direction of the tangential pressing device at different positions changes with the change of the arc of the workbench, from the feeding end to the discharging end, the pressing direction changes from vertical to horizontal, and the pressing device is also arranged approximately horizontally.

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

[0065] The softening of the bamboo is a conventional technology, and the softening temperature and time are known, and the bamboo is more convenient to remove the inner node and flatten after softening.

[0066] After the bamboo comes out of the flattening device, it is clamped by the upper and lower conveying rollers and enters the microwave heating and drying equipment, the microwave heating and drying equipment is a continuous passing type equipment, the bamboo enters from one end and comes out from the other end, and the microwave heating and drying equipment heats, evaporates water and dries the bamboo, and finally the flattened and dried bamboo is obtained.

[0067] The present application can continuously remove the inner node and expand the drying and shaping of the whole long bamboo with a semi-circular shape without cracks, improve the utilization rate of the bamboo, and the process is continuous, can be mechanized, has high operation efficiency, and reduces the labor workload. The inner node of the bamboo is removed completely, and there is no residue, and the loss of the bamboo meat is small, and the utilization rate of the bamboo is high. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 is a schematic diagram of a bamboo inner node removal and flattening and shaping production line.

[0069] Figure 2 is a schematic diagram of a self-induction bamboo inner node removal equipment.

[0070] Figure 3 is a front view of a pinion, a rack, a star gear and the like.

[0071] Figure 4 is a side view of Figure 3 .

[0072] Figure 5 , 6 are different perspective views of a tray composed of three telescopic blocks and the like.

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

[0074] Figure 9 is a schematic view of a telescopic block or the like.

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

[0076] Figure 11 is a perspective view of the body or the like.

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

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

[0079] Figure 14 is a perspective view of the cutting portion.

[0080] Figure 15 is a schematic view of the contact of the curved knife with the inner wall of the outer edge of the tray.

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

[0082] Figure 17 is a schematic view of a radial pressing device, lower roller, upper roller or the like.

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

[0084] Figure 19 is a schematic view of a self-induction bamboo node removal device, guide device, flattening device or 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 of the upper roller 44,

[0089] the frame 16,

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

[0091] the self-induction bamboo node removal device 500,

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

[0093] Body, disc 55, bearing support hole 551, sliding block 552; hollow cylinder 56,

[0094] Cutting part 6, cutter shaft 61, cutter head 62, bending cutter 63, cutter body 631, cutter bottom 6312, cutter head 632, cutter edge 6321, conical cutter 65, drill bit 66,

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

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

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

[0098] Microwave heating drying and shaping equipment 800, conveying roller 801. DETAILED DESCRIPTION

[0099] The specific embodiments of the present application will be further described below according to the accompanying drawings:

[0100] Referring to Figure 11 The bamboo internal node removal and flattening and shaping production line is composed of self-induction bamboo internal node removal equipment 500, guiding device 9, flattening device 100, and microwave drying and shaping equipment 800.

[0101] Referring to Figures 8-10 The self-induction bamboo internal node removal equipment 500 mainly includes a body, power roller device 5, cutting part 6, pressing device 7, and telescopic part 8.

[0102] The power roller device 5 is used to drive the softened bamboo to move along the axis from front to back; the power roller device 5 includes a plurality of rollers 51 that are arranged at intervals on the rack and can actively rotate to support the bottom of the bamboo yellow surface facing down semicircular bamboo 1000 on both sides, so as to drive the softened bamboo 1000 to move along the axis from front to back.

[0103] The body includes a disc 55, a hollow cylinder 56 fixed on the back of the disc, and three bearing support holes 551 uniformly arranged on the same circumference on the disc; the back of the disc has three groups of sliding blocks, and each group has two sliding blocks 552 that are parallel to a diameter of the disc, and a bearing support hole 551 between the two sliding blocks;

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

[0105] The bending cutter 63 includes a cutter body 631 and a cutter head 632. The cutter body 631 is curved and is hingedly connected to the outer periphery of the cutter disc 62. The outer end of the cutter body 631 is a cutter bottom 6312. The bending cutter 63 slides with the outer wall of the outer periphery 811 of the tray under the centrifugal force when the cutter shaft 61 and the cutter disc 62 rotate. The cutting edge of the cutter head is located at the front end of the outer periphery 811 in the axial direction of the cutter shaft 61 and extends 0.2-0.5 mm beyond the outer wall of the outer periphery 811 in the radial direction of the cutter shaft 61.

[0106] The telescopic part 8 includes three fan-shaped telescopic blocks 81, three star gears 82, an inner gear ring 84 and an inner gear ring pushing device. The three telescopic blocks 81 are connected together in the circumferential direction to form a tray (telescopic disc) 80. The inner hole of the tray formed by the inner arc-shaped ends of the three telescopic blocks 81 has a diameter greater than the outer diameter of the hollow cylinder 56. The outer arc-shaped end of the telescopic block 81 has an outer periphery extending beyond the front surface of the telescopic block in the axial direction of the tray, i.e. the outer periphery 811 of the tray. Each telescopic block 81 has a set of sliding grooves 812 on the front surface opposite to the back surface of the tray. Each sliding block is connected to the sliding groove 812 in the radial direction of the tray.

[0107] A slot 813 is formed on each telescopic block 81. The length of the slot 813 is consistent with the diameter of the tray. A rack 85 is fixedly arranged on one side of the slot 813. The length of the rack 85 is consistent with the length of the slot 813. The front end of the three star gear shafts 83 is rotatably supported in the bearing support hole 551 of the tray through a bearing. The star gear 82 is fixed on the star gear shaft 83. Each star gear 82 is engaged with a rack 85 in the axial direction close to the telescopic block. The three star gears 82 are engaged with the inner gear ring 84 in the axial direction close to the inner gear ring. The inner gear ring 84 is located at the rear part of the tray in the axial direction of the cutter shaft 61.

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

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

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

[0111] The cross section of the sliding block and the sliding groove 812 is trapezoidal, and the sliding block is located in the sliding groove 812 to limit the relative movement of the telescopic block 81 and the disc in the axial direction.

[0112] The pressing device 7 is used to press the bamboo 1000 in the radial direction of the bamboo, so that the bamboo yellow surface of the bamboo is attached to the outer edge 811 of the tray, and the bottom of the bamboo 1000 is pressed on 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, the cylinder body of the pressing oil cylinder 71 is arranged on the rack, the end of the pressing oil cylinder piston rod is provided with a rotatable pressing roller 72 (for example, a pressing oil cylinder piston rod end fixed support, a pressing roller shaft is fixed on the support, and the pressing roller is rotatably arranged on the pressing roller shaft), the outer periphery of the pressing roller 72 is in contact with the bamboo green surface, and the rotation axis of the pressing roller 72 is perpendicular to the axis of the bamboo.

[0113] The at least two pressing rollers 72 of the pressing device are located on the same cross section of the bamboo as the outer edge 811 of the tray.

[0114] The outer periphery of the outer edge 811 of the tray is a conical surface with a large front and a small back.

[0115] The pressure controller includes a hydraulic valve and a pressure detection device. The hydraulic valve and the pressure detection device for detecting the hydraulic oil pressure are arranged on the oil supply pipeline of the pressing oil cylinder 71, the hydraulic cylinder one 86 and the hydraulic cylinder two 31. The pressure detection device, the hydraulic valve and the like are connected with the controller, so that the pressure of the pressing oil cylinder 71, the hydraulic cylinder one 86 and the hydraulic cylinder two 31 is constant during work.

[0116] Referring to Figure 11 , the guide device 9 is arranged between the self-induction bamboo internal node removing device 500 and the flattening device 100. The up-down guide device includes a lifting oil cylinder 91 with the cylinder body arranged on the rack, and a lifting roller 92 rotatably arranged on the upper part of the piston rod of the lifting oil cylinder 91, and the rolling axis of the lifting roller 92 is perpendicular to the axis of the bamboo. The lifting oil cylinder 91 is used to lift the bamboo 1000 coming out of the rear end of the self-induction bamboo internal node removing device upward, so that the bamboo yellow surface of the bamboo 1000 entering the front end of the flattening device is in contact with the upper surface of the workbench. The left and right two limiting blocks 93 control the bamboo to enter the directly above of the upper surface of the workbench, without being deviated to the left or right side.

[0117] Referring to Figure 11 , 1-5, the flattening device 100 is to spread the whole long semi-circular bamboo 1000 to improve the utilization width and utilization rate of the bamboo, which comprises a frame 16, a progressive workbench 1, a radial pressing device 2, a tangential pressing device 3, a conveying system 4 and a photoelectric travel switch arranged on the frame.

[0118] The front end of the progressive workbench 1, i.e. the feeding end 11, is a semi-circular arc, and the circular arc gradually changes to a flat surface when extending to the rear end, i.e. the discharging end 12. 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 to move from front to back comprises a plurality of pairs of rollers and a conveying driving device for driving the lower rollers 41 or the upper rollers 42 to rotate, each pair of rollers comprising a lower roller and an upper roller; a pair of rollers is arranged above and below each opening position. The middle of the outer periphery of the upper roller along the 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. A groove is arranged on the concave arc surface 44 of the upper roller, and the extension direction of the groove is consistent with the rolling axis direction of the upper roller. The upper roller 42 is preferably supported by an elastic element (such as a spring) to be in a state of floating up and down and pressing the bamboo 1000, so that the gap between the upper roller 42 and the lower roller 41 can better adapt to the thickness change of the bamboo.

[0120] From front to back along the workbench, the length of each opening 13 and each pair of rollers (lower roller 41 and upper roller 42) in the rolling axis direction of the rollers increases. The lower roller 41 is a driving roller connected to the conveying driving device and is made of temperature-resistant elastic rubber or temperature-resistant plastic material.

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

[0122] A plurality of radial pressing devices 2 are arranged above the workbench from front to back. The radial pressing device comprises a circular arc pressing ring 21, a small pressing roller 22, a pressing roller shaft 23, a pressing rod 24, a spring 25, etc. The pressing ring 21 is sequentially connected by a plurality of pressing roller shafts 23, and a small pressing roller 22 is arranged on each pressing roller shaft 23; the two ends of each pressing roller shaft are respectively hinged to a pressing rod 24. Each pressing rod 24 is slidingly connected to the rack 16, and a spring 25 is arranged between each pressing rod and the rack, which makes each pressing rod 24 and pressing roller shaft 23 close to the upper surface of the workbench in the normal state, and each small pressing roller 22 presses the bamboo material tightly on the upper surface of the workbench. Each pressing ring is basically arc-shaped, and the arc surface on the upper surface of the workbench opposite to the pressing ring is basically concentric.

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

[0124] A photoelectric travel switch as a photoelectric detection device is arranged in front of the front end of the workbench to detect the chord height and arrival time of the semicircular bamboo 1000 about to enter the front end of the workbench, and the photoelectric travel switch is electrically connected with the controller, and the controller is electrically connected with the hydraulic valve for controlling the action of the hydraulic cylinder. The controller controls the extension and retraction of the piston rod two 32 of the hydraulic cylinder two 31 according to the chord height and arrival time of the semicircular bamboo: when the bamboo 1000 does not reach the workbench where the side pressing roller two 33 is located, the piston rod two 32 is in the retracted state and does not hinder the movement of the bamboo; when the bamboo reaches the workbench where the side pressing roller two 33 is located, the piston rod two 32 is extended to press the thickness surface 1001 of the bamboo by the side pressing roller two 33. When the side pressing roller two 33 is in contact with and presses the thickness surfaces on both sides of the bamboo, the hydraulic oil pressure remains unchanged.

[0125] The conveying system comprises a plurality of pairs of rollers and a conveying driving device, a plurality of openings are arranged on the workbench from front (feeding end) to back (discharging end), and a pair of rollers is arranged above each opening; a plurality of radial pressing devices are arranged above the workbench from front to back, the pressing ring in the radial pressing device also changes from small to large along with the change of the arc surface of the workbench, so that the flattening of the arc surface of the bamboo material is realized, the radial pressing device comprises a circular arc pressing ring and a plurality of rotating small pressing rollers arranged on the pressing ring, and the gap between the small pressing rollers and the opposite upper surface of the workbench is not greater than the thickness of the bamboo material; a plurality of symmetrical tangential pressing devices are arranged on both sides of the gradually changing workbench from front to back, the tangential pressing device applies pressure to the thickness surface on both sides of the bamboo material along the tangential direction of the arc of the bamboo material, and the workbench and the tangential pressing device realize the circumferential pressing of the arc bamboo material together, so that the cracking of the bamboo yellow surface caused by uneven stretching of the arc surface in the flattening process is prevented.

[0126] The self-induction inner node removing device is composed of a body, a cutting part and an extension part.

[0127] The body is fixed and bears the cutting part and the extension part. The body is a combination of a disc and a hollow cylinder, three bearing support holes are arranged on the back of the disc (the side close to the hollow cylinder) to support three star gear shafts with the same center, and the centers of the three bearing support holes are on the same circle. There are three groups of sliders on the back of the disc, each group has two sliders with a trapezoidal cross section parallel to a diameter of the disc and distributed on both sides of the bearing support hole. The sliders are guiding supports of the extension blocks. Bearings are arranged in the holes at both ends of the hollow cylinder to support the rotation of the cutter shaft.

[0128] The cutting part is composed of a cutter shaft, a cutter disc, a conical cutter, an arc-shaped curved cutter and a drill bit. At least four arc-shaped curved cutters are connected to the cutter disc through a movable connection. The cutter shaft connects the cutter disc, the conical cutter and the drill bit in series, passes through the long hole of the hollow cylinder of the body and is fixed by bearings. The cutting tool part is arranged in front of the disc in the body. The drill bit is at the front, and the cutter disc with the curved cutters is at the rear. When the bamboo yellow surface of the semicircular bamboo material passes through the cutters of the cutting part, the cutter shaft drives the cutter disc and the cutters to rotate, the drill bit first makes a hole on the diaphragm of the bamboo material, then the conical cutter enlarges the hole, and the cutter disc drives the curved cutters to move away from the center to completely remove the bamboo diaphragm and the bamboo yellow surface.

[0129] The telescopic part is composed of three fan-shaped telescopic blocks, three star gears, an inner gear ring and a piston rod pushing device. The three telescopic blocks are spliced together to form a tray. The outer arc-shaped ends of the three telescopic blocks have an outer edge extending along the axis of the tray beyond the front surface of the telescopic block, and the inner hole of the tray (formed by the inner arc-shaped ends of the three fan-shaped telescopic blocks) has a diameter greater than the outer diameter of the hollow cylindrical body. Also, the tray is evenly divided into three parts with an arc of 120° along the radial direction from the center of the tray, and each part is a telescopic block. The front surface of each telescopic block (the surface opposite to the back surface of the disc) is provided with a set of sliding grooves matched with a set of sliding blocks, each set of sliding grooves has two trapezoidal cross-sections parallel to a diameter. The three sets of sliding grooves on the tray are connected to the three sets of sliding blocks on the body one by one to form a sliding connection mechanism. Since the body is fixed (i.e. the sliding blocks are fixed), the three telescopic blocks can simultaneously slide linearly along the three sliding blocks.

[0130] In addition, three through slots are provided in the three telescopic blocks, the length direction of the slots is consistent with the direction of a diameter of the bottom surface of the tray, and a rack is fixedly installed on one side of the slot wall, the width of the rack is equal to the thickness of the telescopic block (tray) bottom (or 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, and the star gears on each star gear shaft are simultaneously engaged with a rack and an inner gear ring. The three star gears are evenly distributed in a star shape. Each star gear is engaged with a rack to form a gear and rack transmission mechanism, i.e. when the star gear rotates around the star gear shaft, it drives the rack (and the telescopic block) to move linearly, and the linear direction of the engagement between the star gear and the rack is the radial direction. The outer periphery of the three star gears is simultaneously sleeved with an inner gear ring and engaged with the inner gear ring. The back surface of the inner gear ring is hingedly connected to a piston rod, and the piston rod can drive the inner gear ring to rotate through a pushing force, and the inner gear ring drives the three star gears to rotate, and the star gears drive the corresponding racks to move linearly. Since the racks are fixed on the telescopic blocks, the racks drive each telescopic block to move along the trapezoidal sliding blocks, thereby changing the diameter of the tray and realizing the telescoping of the tray.

[0132] In the process of cutting the inner node and bamboo yellow, the bending knife on the cutter head can only rotate in the tray (not more than the inner diameter of the outer edge of the tray (expansion block outer edge)), the inner wall of the outer edge of the tray limits the rotation range of the bending knife, in order to let the bending knife cut off the bamboo yellow and the inner node of the bamboo, the bending knife is designed as a cutter body and a cutter head. The end of the cutter body close to the cutter head (the inner end of the cutter body) is movably connected with 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 a cutter bottom, the cutter bottom is a curved surface, the curvature radius of the curved surface of the cutter bottom changes from large to small, and is larger than the curvature radius of the inner wall of the outer edge of the tray, so that the cutter bottom of the bending knife is in contact with the curved surface of the inner wall of the outer edge of the tray under the action of centrifugal force when rotating. The 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 0.2-0.5mm out of the outer wall of the outer edge of the tray in the radial direction of the cutter shaft, so that the bending knife 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 let the bending knife cut the bamboo yellow and the inner node of the bamboo when the diameter of the tray is increased, the cutter body of the bending knife for cutting the bamboo yellow is designed to be curved, so that the diameter range of the bending knife for cutting can change with the diameter of the tray under the action of centrifugal force when the cutter head rotates.

[0133] In the process of moving the bamboo from the tip end to the root end to cut the inner node and the bamboo yellow, a circumferential thrust control is arranged on the piston rod one, and the hydraulic oil pressure in the hydraulic cylinder one for pushing the piston rod one to move is basically unchanged. When the bamboo moves, the diameter of the inner wall of the bamboo continuously increases, and the contact surface pressure between the outer edge of the tray and the bamboo yellow surface decreases, so that the piston rod one pushes the inner gear ring to rotate, thereby driving the three expansion blocks and the rack to rise, so that the outer edge of the tray is kept close to the bamboo yellow surface.

[0134] The rising of the expansion blocks will cause the outer diameter of the tray formed by the three expansion blocks to increase, and since the minimum circumference of the tray is fixed, the arc wall surface formed by the outer edges of the three expansion blocks will have a gap, and the circumferential gaps between the expansion blocks will also have three larger gaps. The more the diameter increases, the more the width of the circumferential gap between the two circumferentially adjacent expansion blocks will increase (because the arc length is 3.14 times the diameter). In order to ensure that the bending knife can smoothly pass through the circumferential gap during cutting, the curvature of the contact arc surface between the outer end of the cutter body (the cutter bottom) and the inner wall of the outer edge of the tray is slightly larger than that of the inner wall of the outer edge of the tray, so as to prevent the bending knife from colliding when moving from one expansion block to another. The arc surface of the outer end of the cutter body (the cutter bottom) is flat and has a length (arc length) greater than the maximum circumferential gap (arc length) between the expansion blocks, so that the bending knife can smoothly pass through the circumferential gap between the expansion blocks.

[0135] When the half-circular bamboo material that has been debudded enters the workbench of the flattening device, in order to prevent the bamboo material from entering in an inaccurate position and direction, a guiding device is set up between the debudding device and the flattening device, which is composed of an up-and-down guiding device and a left-and-right guiding device with limiting blocks. The up-and-down guiding device controls the height of the bamboo material when it enters the flattening device from the debudding device, so as to ensure that the height of the bamboo material entering is basically consistent with the height above the workbench. The left-and-right guiding device controls the bamboo material to enter the exact position above the workbench, and prevents the bamboo material from deviating to the left or right.

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

[0137] One end (the bamboo material entering end) of the arc-shaped workbench is semicircular, and the other end (the bamboo material flattening discharging end) is flat. From the material entering end to the discharging end, the cross section of the workbench is gradually changed. A plurality of roller holes are opened on the workbench, and conveying rollers are arranged above and below each roller hole. The upper rollers are located above the workbench and are in the shape of an elongated cylinder. The middle position of the length direction of the upper rollers is in the shape of a concave arc, which is parallel to the convex arc of the upper surface of the corresponding position of the workbench. The gap between the concave arc of the upper roller and the corresponding convex arc of the upper surface of the workbench is the wall thickness of the bamboo material. The lower rollers are located below the workbench, and the outer periphery of the lower rollers is flush with the upper surface of the workbench through the roller holes. When the bamboo material passes through the conveying rollers, the bamboo green surface is in close contact with the upper rollers, and the bamboo yellow surface is in close contact with the lower rollers, so that the bamboo material is continuously conveyed to the discharging end.

[0138] When the bamboo material moves with the conveying system, it is pressed by the radial pressing device and the tangential pressing device. The radial pressing device is an arc structure in which a plurality of small pressure rollers are hinged together. The arc is parallel to the upper surface of the corresponding position of the workbench. The distance between the small pressure rollers and the workbench is the wall thickness of the bamboo material. When the bamboo material passes through the gap between the workbench and the radial pressing device, it is pressed and attached to the workbench. As the workbench changes from a circular shape at the material entering end to a flat shape at the discharging end, the bamboo material is flattened by the pressing of the two devices. The transverse strength of the bamboo material is very low. In order to prevent the bamboo material from being pulled in the transverse direction and causing longitudinal cracking during the flattening process, the tangential pressing device is designed.

[0139] The tangential pressing device is composed of a hydraulic cylinder two, a side pressure roller two, a photoelectric sensor (photoelectric detection device) and a pressure controller. The piston rod two of the hydraulic cylinder two is in tangential relationship with the upper surface of the workbench and is tightly 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 edge of the bamboo material, so that the bamboo material is flattened in a circumferential pressing state to prevent longitudinal cracking of the bamboo material.

[0140] The semi-circular bamboo material is discharged from the outlet end of the flattening device 100, 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, is provided with a microwave emitter, an exhaust passage and the like, the bamboo material enters from one end and is discharged from the other end, the bamboo material is heated, evaporates water and is 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 application includes but is not limited to the above embodiments, the protection scope of the present application is subject to the claims, and any replacement, deformation and improvement of the present technology that can be easily thought of by those skilled in the art falls within the protection scope of the present application.

Claims

1. A bamboo material removal, inner node removal, flattening, and shaping production line, characterized by: Includes self-sensing bamboo joint removal equipment and flattening device. The self-sensing bamboo node removal device includes a body, a power roller device, a cutting part, and a telescopic part; the power roller device is used to drive the softened semi-circular strip of bamboo to move from front to back along the axis. The flattening device includes a worktable mounted on a frame, a radial pressurizing device, a tangential pressurizing device, and a conveying system; The body includes a disc and a hollow cylinder fixed to the back of the disc. The disc has three bearing support holes evenly distributed on the same circumference. There are three sets of sliders on the back of the disc. Two sliders in each set 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 head, a conical cutter, an arc-shaped cutter, and a drill bit; the rear part of the cutter shaft passes through and is rotatably supported on a hollow cylinder; the drill bit, the conical cutter, and the cutter head are fixed in sequence from front to back at the front part of the cutter shaft; the rear end of the cutter shaft is connected to a cutting power device mounted on the machine body that drives its rotation. The telescopic section includes three sector-shaped telescopic blocks located on the same circumference, three star gears, an internal gear ring, and an internal gear ring driving 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 ends of the telescopic blocks have an outer edge extending along the axial direction of the tray beyond the front of the telescopic block, and each telescopic block front facing the back of the disk is provided with a set of sliding grooves, each set having 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 disk; The curved blade consists of a fixedly connected blade body and a blade head. The blade body is curved in an arc shape. The inner end of the blade body near the cutter disc is movably connected to the outer periphery of the cutter disc, and the outer end of the blade body near the outer edge of the tray is the blade bottom. When the cutter shaft and cutter disc rotate, the blade bottom slides into contact with the inner wall of the outer edge of the tray under the action of centrifugal force. The blade head is located at the outer end of the blade body, consistent with the axial direction of the cutter shaft. The blade extends out of the front end of the outer edge of the tray. In the radial direction of the cutter shaft, the blade extends out of the outer wall of the outer edge of the tray by 0.2-0.5mm. The blade can remove bamboo pith while removing the inner nodes. A slot is made on each telescopic block, with the length of the slot aligned with a certain diameter of the disk. A rack is fixedly installed on one side of the slot wall, with the length of the rack matching the length of the slot. The front ends of three star gear shafts passing through the three slots are supported in bearing support holes on the disk. Star gears are mounted on the star gear shafts, with each star gear meshing with a rack. All three star gears mesh with an 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 drive device is connected to the internal gear ring and is used to drive the internal gear ring to rotate around the axis; The internal gear ring drive device is activated, causing the internal gear ring to rotate. The three star gears then rotate, and the rack and telescopic block move radially, changing the diameter of the outer edge of the tray.

2. The bamboo inner node removal, flattening, and shaping production line as described in claim 1, characterized in that: The internal gear ring driving device is a hydraulic cylinder; the end of the piston rod of the hydraulic cylinder is hinged to the internal gear ring. When the hydraulic cylinder pushes the piston rod, the hydraulic oil pressure remains constant.

3. The bamboo inner node removal, flattening, and shaping production line as described in claim 1, characterized in that: The arc length of the blade 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 removal, flattening, and shaping production line as described in claim 1, characterized in that: It also includes a pressing device, which includes at least two pressing cylinders arranged radially on the bamboo surface of the semi-circular bamboo. The piston rod end of the pressing cylinder is provided with a rolling pressing roller. The outer circumference of the pressing roller contacts the bamboo surface, and the rolling axis of the pressing roller is perpendicular to the bamboo axis.

5. The bamboo inner node removal, flattening, and shaping production line as described in claim 1, characterized in that: The workbench has a gradually curved surface. Its front end, i.e., the feeding end, is semi-circular and gradually flattens out as it extends towards the rear end, i.e., the discharge end, until the discharge end is completely flat. The conveying system used to drive the softened bamboo with the inner nodes removed from the feeding end to the discharge end includes multiple pairs of rollers located on the upper and lower parts of the gradually curved workbench and a conveying drive device that drives the lower rollers or the upper rollers to rotate. Each pair of rollers includes a lower roller and an upper roller. Multiple openings are set on the workbench from front to back. A pair of rollers is set at the upper and lower parts of each opening. The concave surface of the bamboo, i.e., the yellow surface of the bamboo, is in contact with the upper surface of the workbench, and the bamboo passes through the lower roller and the upper roller in each pair of rollers and is pressed by the lower roller and the upper roller. Multiple radial pressing devices are arranged from front to back on the workbench. Each radial pressing device includes an arc-shaped pressure ring and multiple rotating small pressure rollers arranged on the pressure ring. The gap between the small pressure rollers and the upper surface of the workbench is no greater than the thickness of the bamboo. The arc shape of the pressure ring in the radial pressing device changes from small to large with the arc surface of the workbench. Multiple tangential pressing devices are symmetrically arranged on both sides of the workbench from front to back. The symmetrical tangential pressing devices act on the thickness surface of the bamboo on both sides, and press the bamboo along the tangential direction of the bamboo arc, so as to achieve circumferential pressing of the curved bamboo together with the workbench.

6. The bamboo inner node removal, flattening, and shaping production line according to claim 5, characterized in that: The outer circumference of the upper roller is a concave arc surface along its rolling axis, and the outer circumference of the lower roller is a convex arc surface along its rolling axis. The convex arc surface of the lower roller is flush with the arc surface on the upper surface of the gradient worktable. From the feeding end to the discharging end, in each pair of rollers, the generatrix length of the concave arc surface of the upper roller and the generatrix length of the convex arc surface of the lower roller gradually increase.

7. The bamboo inner node removal, flattening, and shaping production line according to claim 5, characterized in that: The same pressure ring is made up of multiple small pressure roller shafts connected together. Each pressure roller shaft is rotatably equipped with a small pressure roller. The two ends of each small pressure roller shaft are respectively hinged to a pressure rod. An elastic element is set between each pressure rod and the frame. Under normal conditions, the elastic element causes the pressure rods and pressure rollers to move closer to the worktable, and each small pressure roller presses the bamboo tightly onto the worktable.

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

9. The bamboo material removal, flattening, and shaping production line as described in claim 5, characterized in that: It also includes a guiding device located between the self-sensing bamboo inner node removal 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 cylinder or an electric cylinder. The piston rod end of the lifting cylinder or the push rod end of the electric cylinder is equipped with a rolling lifting roller. The rolling axis of the lifting roller is perpendicular to the axis of the bamboo. The left and right guiding device includes two opposing limiting blocks. The upper and lower guiding device is used to lift the bamboo coming out from the rear end of the self-sensing bamboo inner node removal device upwards, so that the yellow surface of the bamboo entering the flattening device contacts the upper surface of the worktable. The left and right guiding device ensures that the bamboo entering the flattening device is located directly above the worktable.

10. The bamboo inner node removal, flattening, and shaping production line as described in claim 5, characterized in that: It also includes microwave heating and drying equipment, which is used to heat and dry the bamboo after it has been flattened out of the flattening device, so that the bamboo is flat and shaped.

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