Semicircular bamboo inner joint removing and unfolding continuous equipment

Abstract

The invention provides semicircular bamboo inner joint removing and unfolding continuous equipment which can continuously remove inner joints of semicircular bamboo and flatten the semicircular bamboo, the inner joints are completely removed without residues, bamboo chips are free of cracks and nicks, the utilization rate of the bamboo is increased, and the semicircular bamboo inner joint removing and unfolding continuous equipment comprises a conveying and inner joint removing device and a flattening device. The conveying and inner joint removing device comprises a power roller device, a cutter head and a pressing device; the cutter head comprises a disc outer sleeve, a rotating disc, a rotating cutter and a lifter. The power roller device drives the bamboo wood to move from front to back; the outer end of a rotating cutter with the inner end hinged to the rotating disc is a cutting edge, and the lifter drives the disc outer sleeve to abut against the tabasheer face. The flattening device comprises a gradual change type working table top, a radial pressurizing device, a tangential pressurizing device and a conveying system. The gradual change type working table is gradually flattened from the feeding end to the discharging end; a plurality of radial pressurizing devices are arranged below the working table, so that nick-free flattening of the cambered surface of the bamboo wood is realized; the tangential pressurizing device applies pressure to the thickness faces of the two sides of the bamboo in the tangential direction of the arc of the bamboo.

Description

Technical Field

[0001] The present invention relates to the technical field of removing inner nodes and flattening bamboo materials, and particularly to a continuous equipment for removing inner nodes and unfolding semi-circular bamboo materials. Background Art

[0002] There are already research patents on domestic equipment for removing inner nodes and horizontally flattening bamboo materials. Since the length of the round bamboo materials horizontally flattened without notches is short, the selected bamboo materials are all root segments near the largest diameter of the bamboo, with a small taper in length and almost the same diameter at both ends of the bamboo. It is easy to remove the inner nodes by mechanical equipment. For the conventional longitudinal flattening of bamboo materials, the part for removing inner nodes is set independently and separately. That is, the workload of removing inner nodes manually is large, the efficiency is low, and there is still some residue of the inner nodes of the bamboo, and the effect is not good. For longitudinal flattening, rolling notches on the bamboo yellow surface are also adopted, resulting in a large loss rate of bamboo flesh and low utilization rate of bamboo materials. Summary of the Invention

[0003] The present invention provides a continuous equipment for removing inner nodes and unfolding semi-circular bamboo materials, which can perform continuous operations of removing inner nodes and flattening on the whole long semi-circular bamboo material, is not limited by the length of the bamboo material, has high operation efficiency, and the inner nodes are removed cleanly without residue, and the flattened bamboo slices have no cracks and notches, and the utilization rate of bamboo materials is improved.

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

[0005] The continuous equipment for removing inner nodes and unfolding semi-circular bamboo materials includes a semi-circular bamboo material conveying and inner node removing device and a semi-circular bamboo material flattening device;

[0006] The semi-circular bamboo material conveying and inner node removing device includes a power roller device, an inner node removing cutter head, and a pressing device;

[0007] The power roller device includes a plurality of rollers that are spaced on the frame and can actively rotate and support the two sides of the semi-circular bamboo material with the bamboo yellow surface facing downwards, so as to drive the softened bamboo material to move along the axis from the front feeding end to the rear discharging end;

[0008] A plurality of inner node removing cutter heads are arranged from front to back. Each cutter head includes a disc outer sleeve, a turntable, a rotary cutter, and a lifter; the rotating turntable is arranged at the front end of the disc outer sleeve and is driven by a turntable driving device to rotate relative to the disc outer sleeve. The inner end of the rotary cutter is hinged to the turntable, and the outer end of the rotary cutter is a blade extending forward and backward. In the radial direction of the turntable, the blade extends about 0.2 - 0.5 mm beyond the outer circumference of the disc outer sleeve; from front to back, the diameters of the disc outer sleeves in each cutter head gradually increase; the lifter arranged on the frame is connected to the disc outer sleeve to drive the disc outer sleeve to abut against the bamboo yellow surface of the semi-circular bamboo material;

[0009] A pressing device is used to press bamboo in the radial direction of the bamboo green surface of the bamboo material, so that the thickness surfaces on both sides of the bamboo material are pressed against the roller, facilitating the fitting of the bamboo yellow surface of the bamboo material with the top of the outer sleeve of the disc for removing the inner nodes.

[0010] A semi-circular bamboo flattening device includes a gradually changing workbench surface, a radial pressing device, a tangential pressing device, and a conveying system arranged on the frame.

[0011] The workbench surface is gradually changing. Its front end, i.e., the feeding end, is semi-circular arc-shaped. 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 to move forward includes multiple pairs of rollers 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. Multiple openings are arranged on the workbench surface from front to back. A pair of rollers is arranged up and down at each opening position. The bamboo 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. The rotation of the upper roller drives the bamboo to move forward. The purpose of arranging the rollers and the conveying driving device is to play a role in conveying and flattening during the flattening process of the semi-circular bamboo.

[0012] The radial pressing device includes an arc-shaped pressing ring and multiple small pressing rollers rotatably arranged on the pressing ring.

[0013] The convex surface of the bamboo material, i.e., the bamboo green surface, fits with the lower surface of the workbench surface. Multiple radial pressing devices are arranged below the workbench surface from front to back. The gap between the small pressing roller and the lower surface of the corresponding workbench surface is not greater than the thickness of the bamboo material. Or, the convex surface of the bamboo material, i.e., the bamboo green surface, fits with the upper surface of the workbench surface. Multiple radial pressing devices are arranged above the workbench surface from front to back. The gap between the small pressing roller and the upper surface of the corresponding workbench surface is not greater than the thickness of the bamboo material.

[0014] From front to back, the arc of the pressing ring in the radial pressing device changes from small to large as the arc surface of the workbench surface changes from small to large. The purpose of arranging the radial pressing device is to make the semi-circular arc-shaped bamboo closely fit to the workbench surface and achieve the flattening of the arc surface of the bamboo.

[0015] Multiple tangential pressing devices are symmetrically arranged on both sides of the workbench surface 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 bamboo arc, together with the workbench surface, to achieve circumferential pressure on the arc surface of the bamboo.

[0016] As an improvement, on the turntable in the cutter head at the foremost position, a tapered cutter extending forward is arranged, and a drill bit extending forward is arranged on the tapered cutter. The turntable, the tapered cutter, and the drill bit are coaxial.

[0017] As an improvement, the pressing device includes two pressing oil cylinders arranged on both sides of the bamboo green surface in the radial direction of the bamboo material. At the end of the piston rod of the pressing oil cylinder, there is a rolling pressing roller. The outer periphery of the pressing roller contacts the bamboo green surface, and the rolling axis of the pressing roller is perpendicular to the axis of the bamboo material.

[0018] As an improvement, the number of pressing devices is the same as that of the cutter discs. The two pressing rollers of each pressing device and the outer sleeve of the disc in a cutter disc are located on the same cross-section of the bamboo material.

[0019] As an improvement, the lifter is a lifting oil cylinder or an electric cylinder, etc. The piston rod of the lifting oil cylinder or the push rod of the electric cylinder is connected to the outer sleeve of the disc.

[0020] As an improvement, the outer peripheral surface of the outer sleeve of the disc is a conical surface that is larger at the front and smaller at the back, so as to be consistent with the taper of the feeding direction of the round bamboo, and keep the outer peripheral surface of the outer sleeve of the disc in close contact with the bamboo yellow surface.

[0021] As an improvement, it further includes a guiding device arranged between the semi-circular bamboo material conveying and inner node removing device and the semi-circular bamboo material flattening device; the guiding device includes a jacking oil cylinder or an electric cylinder, etc., and a rolling jacking roller arranged on the upper part of the piston rod of the jacking oil cylinder or the push rod of the electric cylinder. The rolling axis of the jacking roller is perpendicular to the axis of the bamboo material; the guiding device is used to jack up the bamboo material coming out from the rear end of the semi-circular bamboo material conveying and inner node removing device, so that the bamboo green surface of the bamboo material entering the front end of the semi-circular bamboo material flattening device contacts the lower surface of the workbench.

[0022] As an improvement, when the convex surface of the bamboo material, that is, the bamboo green surface, fits with the lower surface of the workbench, the outer periphery of the upper roller in the conveying device is a concave arc surface along the direction of its rolling axis, and the outer periphery of the lower roller is a convex arc surface along the direction of its rolling axis. The concave arc surface of the upper roller is flush with the arc surface of the lower surface of the workbench. 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, and the arc gradually becomes flatter; preferably, there are grooves 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 rolling axis direction of the upper roller. The lower roller is a driving roller connected to the conveying driving device and is made of heat-resistant rubber or plastic.

[0023] As an improvement, when the convex surface of the bamboo material, that is, the bamboo green surface, fits with the upper surface of the workbench, the outer periphery of the lower roller in the conveying device is a concave arc surface along the direction of its rolling axis, and the outer periphery of the upper roller is a convex arc surface along the direction of its rolling axis. The concave 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 generatrix length of the concave arc surface of the lower roller and the generatrix length of the convex arc surface of the upper roller gradually increase; preferably, there are grooves on the concave arc surface of the lower roller in the conveying device, and the extending direction of the grooves is the same as the rolling axis direction of the lower roller. The upper roller is a driving roller connected to the conveying driving device and is made of heat-resistant rubber or plastic.

[0024] As an improvement, along the working surface from front to back, the lengths of the openings and each pair of roller wheels increase in the direction of the rolling axis of the roller wheels.

[0025] As an improvement, an elastic element is arranged between the pressing ring and the frame. In the normal state, the pressing ring is close to the working surface, and each small pressing roller presses the bamboo against the working surface.

[0026] 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 close to the working surface, and each small pressing roller presses the bamboo against the working surface and realizes the unfolding of the arc surface of the bamboo.

[0027] As an improvement, the arc surface at the lower surface of the working surface opposite to each pressing ring is a concentric circle.

[0028] As an improvement, the tangential pressing device includes a hydraulic cylinder hinged on the frame and a side pressing roller. The end of the piston rod extending out of the hydraulic cylinder is rotatably provided with the side pressing roller; the side pressing roller is coaxial with the piston rod, and the end face of the side pressing roller contacts the thickness surfaces on both sides of the bamboo.

[0029] As an improvement, the tangential pressing device includes a second hydraulic cylinder hinged on the frame and a second side pressing roller. The end of the second piston rod extending out of the second hydraulic cylinder is provided with a rotatable second side pressing roller; the outer periphery of the second side pressing roller contacts the thickness surfaces on both sides of the bamboo, and the rotation axis of the second side pressing roller is perpendicular to the axis of the bamboo.

[0030] As an improvement, the tangential pressing device further includes an oil pressure detection device for detecting the hydraulic oil pressure in the hydraulic cylinder and the second hydraulic cylinder. When the side pressing roller and the second side pressing roller contact the thickness surfaces on both sides of the bamboo and apply pressure, the hydraulic oil pressure remains unchanged.

[0031] 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 semi-circular bamboo about to enter the working surface 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 actions of the hydraulic cylinder and the second hydraulic cylinder, and a hydraulic valve is arranged on the hydraulic pipeline communicating with the hydraulic cylinder and the second hydraulic cylinder; the controller controls the telescopic movement of the piston rod of the hydraulic cylinder and the second piston rod according to the chord height of the semi-circular bamboo: when the bamboo has not reached the working surface where the side pressing roller and the second side pressing roller are located, the piston rod and the second piston rod are in the retracted state and will not interfere with the movement of the bamboo; when the bamboo reaches the working surface where the side pressing roller and the second side pressing roller are located, the piston rod and the second piston rod extend, and the thickness surfaces of the bamboo are pressed by the side pressing roller and the second side pressing roller.

[0032] The beneficial effects of the present invention are as follows:

[0033] The semi-circular bamboo material conveying and inner node removing device consists of a power roller device, multiple inner node (bamboo diaphragm) removing cutter discs with different diameters added between the rollers, and a pressing device.

[0034] The pressing device and the disc outer sleeve in the cutter disc press the bamboo material to prevent the semi-circular bamboo material from vibrating during the cutting process.

[0035] The cutting edge of the rotating cutter extends about 0.2 - 0.5 mm beyond the outer periphery of the disc outer sleeve, and while removing the inner node, it also shaves off a layer of bamboo yellow on the inner yellow surface of the round bamboo. When the smaller end of the semi-circular bamboo material with a smaller diameter passes through the first cutter disc at the frontmost position, the bamboo node and bamboo yellow at the smaller end will be cleanly shaved off. When the bamboo material moves forward, the diameter of the bamboo material continuously increases. The bamboo material passing through the first cutter disc can only remove the circular arched hole from the center of the bamboo diaphragm to the bamboo yellow surface that is consistent with the diameter of the outer sleeve of the first cutter disc, and the bamboo yellow and bamboo node cannot be completely removed. As the bamboo material moves forward and reaches the position of the next cutter disc, the cutter disc with a larger diameter at this position rises under the action of the lifter and abuts against the bamboo yellow surface, and together with the pressing device, presses the semi-circular bamboo material tightly. The rotating cutter in the cutter disc removes the remaining bamboo nodes on the inner wall of the bamboo material and removes a layer of bamboo yellow. Repeat this process to remove all the bamboo yellow and bamboo nodes in the bamboo material.

[0036] Due to the limitation of the disc outer sleeve, the rotating cutter only extends a very small length (0.2 - 0.5 mm) beyond the disc outer sleeve, and it is impossible to cut into more bamboo flesh parts of the bamboo material, which is more convenient for the rotating cutter in the cutter disc to precisely shave off the inner nodes of the bamboo material.

[0037] A conical cutter and a drill bit are arranged on the turntable of the cutter disc at the foremost position, which can prevent the inner node from contacting the front end of the turntable before the rotating cutter cuts the inner node.

[0038] Each pressing device includes two pressing oil cylinders and pressing roller wheels on both sides of the bamboo green surface. The two pressing roller wheels in each pressing device are symmetrically distributed above the bamboo material. The concave surface (bamboo yellow surface) of the semi-circular bamboo material faces downward. When the bamboo material moves under the inner node removing device, the two pressing roller wheels first press the bamboo material tightly, and then the cutter disc abuts against the bamboo material from the bamboo yellow surface under the action of the lifter, and the three fix the semi-circular bamboo material well.

[0039] Preferably, the semi-circular bamboo material conveying and inner node removing device has a pressure controller, 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 cylinder and the lifting oil cylinder. The pressure detection device, the hydraulic valve, etc. are connected to the controller to ensure that the pressures of the pressing oil cylinder and the lifting oil cylinder remain unchanged when the pressing roller wheel and the disc outer sleeve contact the bamboo material.

[0040] Since the semi-circular bamboo material has large and small ends with a certain taper, the diameter of the bamboo material changes continuously. Therefore, a lifter such as a lifting oil cylinder is provided below each cutter head. By setting the pressure of the lifting oil cylinder, the outer sleeve of the disc can be made to press against the bamboo-yellow surface of the semi-circular bamboo material. On the upper part of the cutter head, there are two pressing oil cylinders on the left and right. At the end of the piston rod of the pressing oil cylinder, there is a pressing roller. The two pressing oil cylinders and the outer sleeve of the disc are distributed in a circular plane. The gap between the outer sleeve of the disc and the pressing roller is the thickness of the bamboo material wall. By setting the pressure of the pressing oil cylinder, the semi-circular bamboo material will be fixed by the two pressing rollers and the outer sleeve of the disc, which can prevent the semi-circular bamboo material from vibrating during the cutting process.

[0041] The outer surface of the outer sleeve of the disc is set as a cone, and the taper of the cone is the same as that of the bamboo-yellow surface, so that the outer sleeve of the disc fits better with the bamboo-yellow surface.

[0042] 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, so that the pressing roller closely fits on the bamboo-green surface. The piston rod of the lifting oil cylinder can automatically extend and retract with the direct change of the bamboo material, and the outer sleeve of the disc is closely pressed against the bamboo-yellow surface.

[0043] Preferably, the semi-circular bamboo material conveying to the inner-node removing device has an induction device for detecting inner nodes. The induction device is arranged at the rear of the first cutter head and is used to detect whether there are remaining inner nodes in the bamboo material after passing through the first cutter head. When the small end with a smaller diameter of the semi-circular bamboo material passes through the first cutter head at the front, the bamboo nodes and bamboo-yellow of the small end will be cleanly cut off. When the bamboo material moves forward, the diameter of the bamboo material continuously increases. The bamboo material passing through the first cutter head can only remove the circular arc-shaped hole from the center of the bamboo diaphragm to the bamboo-yellow surface with the same diameter as the outer sleeve of the first cutter head, and the bamboo-yellow and bamboo nodes cannot be completely removed. As the bamboo material moves forward, when it reaches the position of the next cutter head, under the monitoring of the induction device for detecting bamboo nodes arranged below the bamboo material, when it is sensed that there is no bamboo-yellow and inner nodes on the inner wall of the bamboo material, it continues to pass through. When it is sensed that there are bamboo nodes, the cutter head with a larger diameter at this position rises under the action of the lifting oil cylinder and presses against the bamboo-yellow surface, and together with the two pressing oil cylinders above, presses the semi-circular bamboo material tightly. The rotating cutter in the cutter head removes the remaining bamboo nodes on the inner wall of the bamboo material and removes a layer of bamboo-yellow. Repeat this process to remove all the bamboo-yellow and bamboo nodes in the bamboo material.

[0044] The guiding device is located between the bamboo-node removing power roller device and the flattening workbench and is composed of a jacking oil cylinder and a jacking roller. Since the small end of the bamboo material enters first and has a smaller diameter, the feeding end of the workbench surface is a semi-circular arc with a larger diameter and the arc top is at a higher position. When the small end of the bamboo material enters below the workbench surface, it is difficult to automatically fit onto the concave surface of the workbench surface. At this time, the piston rod of the jacking oil cylinder rises to lift the bamboo material so that the bamboo-green surface contacts and fits with the concave surface of the workbench surface.

[0045] The semi-circular whole bamboo material after removing internal nodes and softening is fed into the workbench surface from the feeding end of the workbench surface, and is clamped by a pair of rollers near the feeding end, namely the lower roller and the upper roller. After that, under the action of the upper and lower roller conveying system, the bamboo material moves from front to back along the workbench surface. During the movement, under the action of the radial pressure small pressing roller, the outer arc surface (bamboo green surface) of the bamboo material always fits with the lower surface of the workbench surface, and the bamboo material is gradually flattened; at the same time, the tangential pressure device applies pressure to the bamboo material along the tangential (circumferential) direction of the arc surface of the bamboo material. Due to the fact that the bamboo yellow surface of the bamboo material will be stretched during the process of the small pressing roller and the roller radially rolling and flattening the bamboo material, in order to prevent excessive stretching caused by uneven stretching of each point on the arc of the bamboo yellow surface, the tangential pressure plays a role in pressing the circumference of the bamboo material arc, that is, pressing along the tangential direction of the bamboo material arc, compressing 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 compressed more, while the bamboo yellow surface will be compressed less, preventing the bamboo yellow surface from cracking due to excessive stretching during the flattening process of the arc-shaped bamboo material.

[0046] The workbench surface 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 is completely planar. A plurality of openings are provided in the workbench surface. 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 there are grooves 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 concave arc surface of the upper roller is flush with the lower surface arc of the workbench surface. The lower roller is made of heat-resistant rubber or plastic (because the softened semi-circular 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 surface also increases) to increase the friction force on the bamboo material and at the same time increase the pressing on the flattened surface of the bamboo material.

[0047] The clearance distance between the small pressure roller on the pressure ring and the lower surface of the workbench is not greater than the thickness of the bamboo, which facilitates the curved bamboo to pass through the clearance and can apply a certain pressure to the bamboo to make it fit the arc surface of the workbench, achieving a progressive unfolding of the arc surface of the bamboo. The radian of the pressure ring at different front and rear positions below the workbench surface also changes, the same as the radian of the workbench surface, but the arc surface at the lower surface of the workbench corresponding to each pressure ring is a concentric circle. The small pressure roller and the workbench surface together play a role in restricting the arc of the bamboo. When the bamboo passes through the clearance from the arc end (feeding end) of the workbench surface 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 different bamboos, making the bamboo be pressed and attached to the arc-shaped workbench surface as soon as it enters the workbench surface, so that the bamboo is in an unfolded state. Due to the thickness difference of the bamboo wall, the thin wall of the small end of the bamboo near the bamboo tip, and the thick wall of the big end of the bamboo near the bamboo root. If the clearance distance remains unchanged, the radial pressure on the bamboo will change with the change of the bamboo thickness. It is possible that the thinner-walled bamboo does not receive radial pressure. Therefore, elastic elements such as springs are installed on the radial pressing device to adjust the clearance size, so as to realize the radial pressing of the thin-walled bamboo and make the thin-walled bamboo also fit well on the changing workbench surface.

[0048] There is also a taper in the bamboo. The diameter and chord height of the semi-circular bamboo 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, an oil pressure detection and control device (such as a pressure gauge and a control valve) is set for the hydraulic cylinder of the tangential pressing device. When the arc diameter of the bamboo is larger, the length of the piston rod extending out is shorter, and vice versa. The oil pressure detection and control device can expand and contract according to the change of the pressure felt by the change of the chord height of the bamboo arc contacted by the side pressure roller, realizing continuous and effective tangential pressure on the bamboo wall.

[0049] The diameters of different bamboo materials vary. When a bamboo material passes through a certain tangential pressing 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, the chord heights of the semi-circular bamboo materials are different. In order not to prevent the next bamboo material from moving to the working table surface position where this tangential pressing device is located (at this position) and passing through smoothly, this requires that the tangential pressing device can be lifted (retracted) in advance in a timely manner. And after the next bamboo material moves to the working table surface where this tangential pressing device is located, the tangential pressing device can quickly press upward to exert pressure on the side surface (thickness surface) of the bamboo material. Therefore, an optoelectronic detection device for detecting the chord height of the semi-circular bamboo material about to enter the front end of the working table is provided in front of the front end of the working table. The controller controls the telescopic movement of the piston rod of the hydraulic cylinder according to the chord height of the semi-circular bamboo material. Optoelectronic detection devices are also provided in front of other tangential pressing device positions, and the purpose is the same. Descent and pressing times are set for each tangential pressing device, so that the tangential pressing devices at different positions can contract sequentially and then press upward quickly.

[0050] The tangential pressing devices are not all arranged vertically upward. At different positions, the pressing directions of the tangential pressing devices change with the curvature of the working table surface. From the feeding end, they are vertically placed and press the bamboo material vertically. To the discharging end, as the curvature of the bamboo slices gradually becomes flat, the pressing devices are also approximately horizontally placed and press the bamboo material approximately horizontally.

[0051] 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 curvature of the concave arc surface of the upper roller near the feeding end of the working table surface is the largest. From the feeding end to different positions at the discharging end, the arc curvature of the concave arc surface of the upper roller 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 material. From the feeding end to different positions at the discharging end, the lengths of the rollers are continuously increasing.

[0052] Bamboo material softening belongs to conventional technology, and the softening temperature and time are well-known. After softening, the internal joints of the bamboo are removed so that the bamboo material can be smoothly conveyed and move along the working table surface.

[0053] The present invention can continuously remove the internal joints of the semi-circular whole long bamboo material without cracks and flatten it, improving the utilization rate of bamboo materials. And the process is continuous, capable of mechanized operation, with high operation efficiency and reduced manual workload. The internal joints of the bamboo are removed cleanly without residue. At the same time, the loss of bamboo flesh is small and the utilization rate of bamboo materials is high. Description of the Drawings

[0054] Figure 1 It is the front view schematic diagram of the semi-circular bamboo material flattening device.

[0055] Figure 2 It is the bottom view schematic diagram of the semi-circular bamboo material flattening device.

[0056] Figure 3Schematic diagrams of the workbench surface, tangential pressing device, etc. at different cross-sections from front to back.

[0057] Figure 4 Schematic diagrams of the workbench surface, radial pressing device, etc. at different cross-sections from front to back.

[0058] Figure 5 Side view schematic diagram of the semi-circular bamboo flattening device (feeding end).

[0059] Figure 6 Schematic diagram when the tangential pressing device presses on the thickness surface of the bamboo.

[0060] Figure 7 Schematic diagrams of the lower roller and upper roller at different positions from front to back.

[0061] Figure 8 Schematic diagram of the semi-circular bamboo conveying and inner node removing device.

[0062] Figure 9 Side view of the first cutter head, etc.

[0063] Figure 10 Front view of the first cutter head, etc.

[0064] Figure 11 Schematic diagram of the semi-circular bamboo inner node removing and unfolding continuous equipment.

[0065] In the figure, the semi-circular bamboo flattening device 100, workbench surface 1, feeding end 11, discharging end 12, opening 13.

[0066] Radial pressing device 2, pressing ring 21, small pressing roller 22, pressing roller shaft 23, pressing rod 24, spring 25.

[0067] Tangential pressing device 3, hydraulic cylinder 31, piston rod 32, side pressing roller 33.

[0068] Conveying system 4, lower roller 41, upper roller 42, concave arc surface 44 of the upper roller.

[0069] Frame 16.

[0070] Bamboo 1000, bamboo thickness surface 1001, inner node 1002, residual bamboo node 1003.

[0071] Semi-circular bamboo conveying and inner node removing device 500.

[0072] Power roller device 5, roller 51, cutter head 6, disc outer sleeve 61, turntable 62, rotating cutter 63, lifter 64, lifting hydraulic cylinder 641, conical cutter 65, drill bit 66, pressing device 7, pressing hydraulic cylinder 71, pressing roller 72, pulley 81, belt 82.

[0073] Guiding device 9, lifting oil cylinder 91, lifting roller 92. Detailed implementation mode

[0074] The following further describes the detailed implementation mode of the present invention with reference to the accompanying drawings:

[0075] Embodiment 1: Semi-circular bamboo material inner node removal and unfolding continuous equipment

[0076] See Figure 11 , the semi-circular bamboo material inner node removal and unfolding continuous equipment of this Embodiment 1 is composed of a semi-circular bamboo material conveying and inner node removal device 500, a guiding device 9 and a semi-circular bamboo material flattening device 100.

[0077] See Figures 8 - 10 , the semi-circular bamboo material conveying and inner node removal device 500 mainly includes a power roller device 5, a cutter head 6, and a pressing device 7;

[0078] The power roller device 5 includes a plurality of rollers 51 that are spaced on the frame and can actively rotate and support the bottom sides of both sides of the semi-circular bamboo material 1000 with the bamboo yellow surface facing down, so as to drive the softened bamboo material 1000 to move along the axis from the front feeding end to the rear discharging end;

[0079] A plurality of cutter heads 6 are arranged from front to back. Each cutter head 6 includes a disc outer sleeve 61, a turntable 62, a rotary cutter 63, and a lifter 64; the turntable 62 is rotatably arranged at the front end of the disc outer sleeve 61 and is driven by a turntable driving device to rotate relative to the disc outer sleeve 61. The inner end of the rotary cutter 63 is hinged on the turntable 62, and the outer end of the rotary cutter 63 is a blade extending forward and backward. In the radial direction of the turntable 62, the blade extends about 0.2 - 0.5 mm beyond the outer circumference of the disc outer sleeve 61; from front to back, the diameters of the disc outer sleeves 61 in each cutter head gradually increase. The lifter 64 is a lifting oil cylinder 641. The piston rod of the lifting oil cylinder is connected to the disc outer sleeve 61, and the cylinder body of the lifting oil cylinder is connected to the frame. The lifting oil cylinder 641 drives the disc outer sleeve 61 to press against the bamboo yellow surface of the semi-circular bamboo material 1000.

[0080] On the turntable 62 of the cutter head at the foremost position, a conical cutter 65 extending forward is provided, and a drill bit 66 extending forward is provided on the conical cutter 65. The turntable 62, the conical cutter 65, and the drill bit 66 are coaxial.

[0081] The turntable driving device can be a motor directly arranged on the disc outer sleeve 61, etc. At this time, the turntable driving device and the disc outer sleeve 61 are lifted together under the drive of the lifting oil cylinder 641. The turntable driving device such as a motor can also be arranged on the frame. See Figure 8, at this time, the motor is connected to the turntable 62 through a belt drive mechanism composed of a pulley 81 fixed on the turntable, a pulley fixed on the output shaft of the motor, a belt 82, and a tension pulley. The lifting oil cylinder 641 only drives the outer sleeve 61 of the disc and the turntable 62 to lift, and the motor does not lift. Therefore, a tension pulley needs to be set to tension the belt and adapt to the change in the distance between the two pulleys. Of course, this belongs to the prior art and will not be described in detail.

[0082] 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 top of the outer sleeve 61 of the disc, and the two sides of the bottom of the bamboo material 1000 are pressed against the roller. The pressing device 7 includes 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, and the end of the piston rod of the pressing oil cylinder is provided with a rolling pressing roller 72. The outer circumference of the pressing roller 72 contacts the bamboo green surface, and the rolling axis of the pressing roller 72 is perpendicular to the axis of the bamboo material.

[0083] The number of pressing devices is the same as that of the cutter head. The two pressing rollers 72 of each pressing device and the outer sleeve 61 of a cutter head are located on the same cross-section of the bamboo material.

[0084] The outer peripheral surface of the outer sleeve 61 of the disc is a conical surface that is larger at the front and smaller at the rear.

[0085] 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 of the pressing oil cylinder 71 and the lifting oil cylinder 641. The pressure detection device, the hydraulic valve, etc. are connected to the controller to ensure that the pressures of the pressing oil cylinder 71 and the lifting oil cylinder 641 remain unchanged when the pressing roller 72 and the outer sleeve of the disc contact the bamboo material.

[0086] The induction device for detecting the inner node is arranged at the rear of the first cutter head and is used to detect whether there is a residual inner node 1003 in the bamboo material after passing through the first cutter head.

[0087] See Figure 11 , the guiding device 9 is arranged between the semi-circular bamboo material conveying and inner node removing device 500 and the semi-circular bamboo material flattening device 100. The guiding device 9 includes a lifting oil cylinder 91 with the cylinder body arranged on the frame, and a rolling lifting roller 92 arranged on the upper part of the piston rod of the lifting oil cylinder 91. The rolling axis of the lifting roller 92 is perpendicular to the axis of the bamboo material; the guiding device is used to lift the bamboo material 1000 coming out from the rear end of the semi-circular bamboo material conveying and inner node removing device upward, so that the bamboo green surface of the bamboo material 1000 entering the front end of the semi-circular bamboo material flattening device contacts the lower surface of the workbench surface.

[0088] The semi-circular bamboo material conveying and inner node removing device is composed of a power roller device, multiple inner node removing (bamboo diaphragm) cutter discs with different diameters added between the rollers, and a pressing device. The two pressing rollers in each pressing device are symmetrically distributed above the bamboo material, with the concave surface (bamboo yellow surface) of the semi-circular bamboo material facing downwards. When the bamboo material moves under the inner node removing device, the two pressing rollers first press the bamboo material, and then the cutter disc resists the bamboo material from the bamboo yellow surface under the action of the lifter. The three components fix the semi-circular bamboo material well. The cutter disc contains multiple rotating cutters for removing the inner node (bamboo diaphragm).

[0089] From the feed end to the discharge end, the diameter of the outer disc sleeves of the cutter discs in each one increases. Except for the conical cutter and drill bit arranged in the cutter disc at the very front closest to the feed end, no conical cutter and drill bit are arranged in other cutter discs.

[0090] The diameter of the cutter disc (outer disc sleeve diameter) near the feed end of the roller is the smallest. The outer disc sleeve contacts the bamboo yellow arc surface, and the cutting edges of multiple cutters, such as 4 cutters, on the turntable extend about 0.2 - 0.5 mm out of the outer disc sleeve.

[0091] Since semi-circular bamboo materials have large and small ends with a certain taper, the diameter of the bamboo materials changes continuously. Therefore, a lifter such as a lifting oil cylinder is provided below each cutter head. By setting the pressure of the lifting oil cylinder, the outer sleeve of the disc can be made to press against the inner yellow surface of the semi-circular bamboo material. There are two pressing oil cylinders, one on the left and the other on the right, above the cutter head. At the end of the piston rod of the pressing oil cylinder, there is a pressing roller. The two pressing oil cylinders and the outer sleeve of the disc are distributed in a circular plane. The gap between the outer sleeve of the disc and the pressing roller is the thickness of the bamboo wall. By setting the pressure of the pressing oil cylinder, the semi-circular bamboo material will be fixed by the two pressing rollers and the outer sleeve of the disc, which can prevent the semi-circular bamboo material from vibrating during cutting. Due to the limitation of the outer sleeve of the disc, the rotating cutter only extends a very small length outside the outer sleeve of the disc and it is impossible to cut into more bamboo flesh of the bamboo material, which makes it more convenient for the rotating cutter in the cutter head to precisely cut off the internal nodes 1002 of the bamboo material. The outer surface of the outer sleeve of the disc is set as a cone, and the taper of the cone is the same as that of the inner yellow surface, so that the outer sleeve of the disc fits better with the inner yellow surface. The pressing oil cylinders are also equipped with pressure controllers, which can automatically extend and retract the piston rods of the pressing oil cylinders according to the change of the diameter of the bamboo material, so that the pressing rollers are closely attached to the outer green surface. A lifting oil cylinder is also provided below the outer sleeve of the disc, and the lifting oil cylinder is also equipped with a pressure controller. Under the control of the pressure controller, the piston rod of the lifting oil cylinder can automatically extend and retract with the direct change of the bamboo material, and closely press the outer sleeve of the disc against the inner yellow surface. The drill bit is at the front of the cutter head and can drill a hole through the bamboo partition. Subsequently, the conical cutter rotates to expand the hole, and the remaining bamboo partition (residual bamboo node 1003) connected to the inner yellow surface is removed by multiple rotating cutters. The cutting edge of the rotating cutter extends about 0.2 - 0.5 mm outside the outer circumference of the outer sleeve of the disc, and while removing the internal nodes, a layer of inner yellow on the inner side of the round bamboo is also shaved off. When the small end with a smaller diameter of the semi-circular bamboo material passes through the first cutter head at the very front, the bamboo node and the inner yellow of the small end will be cleanly shaved off. When the large end of the bamboo material moves forward, the diameter of the bamboo material continuously increases. The bamboo material passing through the first cutter head can only remove the round-arch hole from the center of the bamboo diaphragm to the inner yellow surface that is consistent with the diameter of the outer sleeve of the first cutter head, and the inner yellow and the bamboo node cannot be completely removed. As the bamboo material moves forward, when it reaches the position of the next cutter head, under the monitoring of the induction device for detecting bamboo nodes provided below the bamboo material, when it is sensed that there is no inner yellow and internal nodes on the inner wall of the bamboo material, it continues to pass through. When it is sensed that there is a bamboo node, the cutter head with a larger diameter at this position rises under the action of the lifting oil cylinder and presses against the inner yellow surface, and together with the two pressing oil cylinders above, presses the semi-circular bamboo material tightly. The rotating cutter in the cutter head removes the residual bamboo node 1003 on the inner wall of the bamboo material and removes a layer of inner yellow. Repeat this process to completely remove all the inner yellow and bamboo nodes in the bamboo material.

[0092] The guiding device is located between the rear of the power roller device and the front of the workbench. It consists of a lifting oil cylinder and lifting rollers. Since the small end of the bamboo enters first and has a smaller diameter, the feeding end of the workbench is a semi-circular arc with a larger diameter, and the arc top is at a higher position. When the small end of the bamboo enters below the workbench surface, it is difficult to automatically fit onto the concave surface of the workbench. At this time, the piston rod of the lifting oil cylinder rises to lift the bamboo, so that the bamboo green surface contacts and fits onto the concave surface of the workbench.

[0093] See Figure 11 、 1 -5, the semi-circular bamboo flattening device 100 is used to flatten the whole long semi-circular bamboo 1000 to improve the utilization width and utilization rate of the bamboo. It includes a frame 16, on which a progressive workbench surface 1, a radial pressing device 2, a tangential pressing device 3, a conveying system 4, a photoelectric travel switch, etc. are provided.

[0094] The front end, i.e., the feeding end 11, of the progressive workbench surface 1 is semi-circular arc-shaped. When extending towards the rear end, i.e., the discharging end 12, the arc gradually flattens until the discharging end is completely flat. A plurality of openings 13 are provided in the middle of the workbench surface from front to back.

[0095] The conveying system 4 for driving the bamboo 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 concave arc surface of the upper roller is flush with the arc surface of the lower surface of the workbench surface. 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 lower roller 41 is preferably in a state of floating up and down and pressing the bamboo 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.

[0096] Along the workbench surface from front to back, the lengths of the openings 13 and each pair of rollers (the lower roller 41 and the upper roller 42) increase in the rolling axis direction of the rollers. 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.

[0097] The convex (bamboo green) surface of the softened bamboo material 1000 of the inner section is attached to the lower surface (concave surface) of the workbench surface 1, and the bamboo material 1000 passes 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 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 vary. The bus length is the shortest near the feeding end. 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.

[0098] A plurality of radial pressing devices 2 are arranged under the workbench surface from front to back. The radial pressing device includes an arc-shaped 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 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. In the 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 lower surface of the workbench opposite to the pressing ring is basically a concentric circle.

[0099] A plurality of tangential pressing devices 3 are symmetrically arranged on both sides of the workbench surface 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 hydraulic cylinder 31 with the lower end hinged on the frames on both sides of the workbench surface, a hydraulic pipeline provided with a hydraulic valve, an oil pressure detection and control device for detecting and controlling the hydraulic oil pressure in the hydraulic cylinder, and a side pressing roller 33, etc. A rotatable side pressing roller 33 is rotatably arranged at the end of the piston rod 32 extending out of the hydraulic cylinder 31; the side pressing roller 33 is coaxial with the piston rod 32, the radius of the side pressing roller 33 is not less than the thickness of the bamboo material 1000, the outer peripheral surface of the side pressing roller contacts the lower surface of the edge of the workbench surface, and the part of the end surface of the side pressing roller close to the lower surface of the workbench surface contacts the bamboo material thickness surface 1001 at the bottom side of the bamboo material 1000.

[0100] Of course, tangential pressure devices with other structures can also be adopted. For example, another tangential pressure device includes a hydraulic cylinder two whose lower end is hinged to the racks on both sides of the workbench surface, a hydraulic pipeline provided with a hydraulic valve, an oil pressure detection and control device for detecting and controlling the hydraulic oil pressure in the hydraulic cylinder two, and a side pressure roller two, etc. A fixed bracket two is fixed to the end of the piston rod two of the hydraulic cylinder two. The side pressure roller two shaft is fixed on the fixed bracket two, and the side pressure roller two is rotatably arranged on the side pressure roller two shaft. The outer circumference of the side pressure roller two contacts the thickness surfaces 1001 on both sides of the bamboo, and the rotation axis of the side pressure roller two is perpendicular to the axis of the bamboo.

[0101] The photoelectric travel switch serving as the photoelectric detection device is arranged in front of the front end of the workbench surface and is used to detect the chord height and arrival time of the semi-circular bamboo 1000 that is about to enter the front end of the workbench surface. The photoelectric travel switch is electrically connected to the controller, and the controller is electrically connected to the hydraulic valve that controls the actions of the hydraulic cylinder and the hydraulic cylinder two. The controller controls the telescoping of the piston rod 32 of the hydraulic cylinder 31 and the piston rod two of the hydraulic cylinder two according to the chord height and arrival time of the semi-circular bamboo: when the bamboo 1000 has not reached the workbench surface where the side pressure roller 33 and the side pressure roller two are located, the piston rod 32 and the piston rod two are in the retracted state and will not interfere with the movement of the bamboo; when the bamboo reaches the workbench surface where the side pressure roller 33 and the side pressure roller two are located, the piston rod 32 and the piston rod two extend, and the side pressure roller 33 and the side pressure roller two apply pressure to the thickness surface 1001 of the bamboo. When the side pressure roller 33 and the side pressure roller two contact and apply pressure to the thickness surfaces on both sides of the bamboo, the hydraulic oil pressure remains unchanged.

[0102] The semicircular bamboo material inner section removal and unfolding continuous equipment provided by the present invention can continuously remove the inner sections and flatten the semicircular whole bamboo material at one time, with high working efficiency, and the inner sections are removed cleanly without residue, scratches, and cracks in the bamboo pieces, thereby improving the utilization rate of the bamboo material. The semicircular bamboo material conveying and inner section removal device and the semicircular bamboo material flattening device are included. The semicircular bamboo material conveying and inner section removal device includes a power roller device, a knife disc, and a pressing device; each knife disc includes a disc jacket, a rotating disc, a rotating knife, and a lifting device; the power roller device drives the softened bamboo material to move along the axis from the front feeding end to the rear discharging end; the rotating disc is rotatably arranged at the front end of the disc jacket and rotates relative to the disc jacket, the inner end of the rotating knife is hinged on the rotating disc, and the outer end of the rotating knife is a blade extending forward and backward, and the blade extends out of the outer circumference of the disc jacket, and the lifting device drives the top of the disc jacket to stick to the bamboo yellow surface of the semicircular bamboo material; the pressing device makes the bamboo yellow surface of the bamboo material fit with the top of the disc jacket. The semicircular bamboo flattening device includes a gradual work surface, a radial pressure device, a tangential pressure device and a conveying system. The feed end of the gradual work surface is semicircular, and the arc gradually flattens when extending to the discharge end until the discharge end is completely flat; the conveying system includes multiple pairs of rollers and conveying drive devices. Multiple openings are set on the work surface from the front (feed end) to the back (discharge end), and a pair of rollers are set up above and below each opening; multiple radial pressure devices are set under the work surface from front to back, and the pressure ring in the radial pressure device changes from small to large as the arc surface of the work surface changes from small to large, so as to realize the arc surface of the bamboo. The flattening device comprises an arc-shaped pressure ring and a plurality of rotating small pressure rollers arranged on the pressure ring, and the gap between the small pressure rollers and the lower surface of the relative work table is not greater than the thickness of the bamboo material; a plurality of symmetrical tangential pressure devices are arranged on both sides of the gradient work table from front to 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 arc of the bamboo material, and together with the work table, the arc bamboo material is pressed circumferentially to prevent the bamboo yellow surface from cracking due to uneven stretching of the arc surface during the flattening process.

[0103] Example 2: Semi-circular bamboo stripping and continuous unfolding equipment

[0104] The main difference between Example 2 and Example 1 is that the semi-circular bamboo flattening device in Example 2 adopts the semi-circular bamboo flattening device described in the specific implementation method section (including the drawings in its specification) of the patent application with application number 2024114721663, publication number CN119036588A, and publication date November 29, 2024;

[0105] In embodiment 2, there is no guiding device in embodiment 1;

[0106] In Embodiment 2, there is a turning device (which is not present in Embodiment 1). The turning device is located between the semi-circular bamboo flattening device and the semi-circular bamboo transporting and inner-node removing device. The turning device is used to turn the bamboo coming out from the rear end of the semi-circular bamboo transporting and inner-node removing device upside down by 180° and then transport it, so that the bamboo with the bamboo-green surface facing down after being turned upside down enters the semi-circular bamboo flattening device, and the bamboo-green surface of the bamboo can contact the upper surface of the workbench. Obviously, there are various types of turning devices. For example, it can be two clamping plates that can move relatively up and down. The bamboo coming out from the semi-circular bamboo transporting and inner-node removing device is pushed between the two clamping plates. The two clamping plates move towards each other to clamp the bamboo, and then the clamping plates rotate 180° around the axial direction of the bamboo, so that the bamboo can be turned over. After that, the two clamping plates move away from each other, and the bamboo can be released. The turned-over bamboo can enter the semi-circular bamboo flattening device under the push of the subsequent bamboo coming out from the semi-circular bamboo transporting and inner-node removing device, and the subsequent flattening process can be carried out.

[0107] 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. Any replacement, deformation, and improvement that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present invention.

Claims

1. The semicircular bamboo material inner node removing and unfolding continuous equipment is characterized in that: It includes a semi-circular bamboo material conveying and inner node removing device and a semi-circular bamboo material flattening device; The semi-circular bamboo material conveying and inner node removing device includes a power roller device, an inner node removing cutter head, and a pressing device; The power roller device includes a plurality of rollers that are actively rotatable and are spaced on the frame and support both sides of the semi-circular bamboo material with the bamboo yellow surface facing downwards, so as to drive the softened bamboo material to move along the axis from the front feeding end to the rear discharging end; There are a plurality of cutter heads for removing the inner nodes of the semi-circular bamboo from front to back. Each inner node removing cutter head includes a disc outer sleeve, a turntable, a rotary cutter, and a lifter; the turntable is rotatably arranged at the front end of the disc outer sleeve and is driven by a turntable driving device to rotate relative to the disc outer sleeve. The inner end of the rotary cutter is hinged to the turntable, and the outer end of the rotary cutter is a blade extending in the front and back direction. In the radial direction of the turntable, the blade extends about 0.2 - 0.5 mm beyond the outer circumference of the disc outer sleeve; along the roller feeding device from front to back, the diameters of the disc outer sleeves in each cutter head gradually increase; the lifter arranged on the frame is connected to the disc outer sleeve to drive the disc outer sleeve to abut against the bamboo yellow surface of the semi-circular bamboo material; The pressing device is used to press the bamboo material in the radial direction of the bamboo green surface of the bamboo material and make the thickness surfaces on both sides of the semi-circular bamboo material press against the rollers, so as to facilitate the bamboo yellow surface of the bamboo material to fit against the top of the disc outer sleeve; The semi-circular bamboo material flattening device includes a workbench surface arranged on the frame, a radial pressing device, a tangential pressing device, and a conveying system; The workbench surface 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 softened bamboo material with inner nodes removed to move from the feeding end to the discharging end includes multiple pairs of rollers located above and below the gradually changing workbench surface 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 surface from front to back, and a pair of rollers is arranged above and below each opening position. The bamboo material passes through between the lower roller and the upper roller in each pair of rollers and is pressed by the lower roller and the upper roller; the purpose of arranging the rollers and the conveying driving device is to play a role in conveying and flattening during the flattening process of the semi-circular bamboo material; The radial pressing device includes an arc-shaped pressing ring and a plurality of rotating small pressing rollers arranged on the pressing ring; The convex surface of the bamboo material, i.e., the bamboo green surface, fits against the lower surface of the workbench surface. A plurality of radial pressing devices are arranged below the workbench surface from front to back, and the gap between the small pressing roller and the opposite lower surface of the workbench surface is not greater than the thickness of the bamboo material; alternatively, the convex surface of the bamboo material, i.e., the bamboo green surface, fits against the upper surface of the workbench surface. A plurality of radial pressing devices are arranged above the workbench surface from front to back, and the gap between the small pressing roller and the opposite upper surface of the workbench surface 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 surface changes from small to large; the purpose of arranging the radial pressing device is to make the semi-circular arc-shaped bamboo material closely fit against the workbench surface and achieve the flattening of the arc surface of the bamboo material; A plurality of tangential pressing devices are symmetrically arranged on both sides of the workbench surface from front to back. The symmetric tangential pressing devices act on the thickness surfaces on both sides of the bamboo, and press the bamboo in the tangential direction of the bamboo arc, and together with the workbench surface, realize the circumferential pressing of the semi-circular bamboo.

2. The semi-circular bamboo material inner-node removing and unfolding continuous equipment according to claim 1, characterized in that: When the convex surface of the bamboo, i.e., the bamboo green surface, is in contact with the lower surface of the workbench surface, 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 concave arc surface of the upper roller is flush with the arc surface of the lower surface of the gradient workbench surface. 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.

3. The semi-circular bamboo material inner-node-removing and unfolding continuous equipment according to claim 1, characterized in that: When the convex surface of the bamboo, i.e., the bamboo green surface, is in contact with the upper surface of the workbench surface, the outer circumference of the lower roller is a concave arc surface along the direction of its rolling axis, and the outer circumference of the upper roller is a convex arc surface along the direction of its rolling axis. The concave arc surface of the lower roller is flush with the arc surface of the upper surface of the gradient workbench surface. From the feeding end to the discharging end, in each pair of rollers, the generatrix length of the concave arc surface of the lower roller and the generatrix length of the convex arc surface of the upper roller gradually increase.

4. The semi-circular bamboo material inner-node removing and unfolding continuous equipment according to claim 1, characterized in that: The same pressing ring is formed by connecting a plurality of small roller shafts. A small 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. The elastic element makes each pressing rod and the roller shaft approach the workbench surface in the normal state, and each small roller presses the bamboo tightly on the workbench surface.

5. The semicircular bamboo material inner-node removing and unfolding continuous equipment according to claim 1, characterized in that: The tangential pressing device includes a hydraulic cylinder hinged on the frame and a side pressing roller. A rotating side pressing roller is arranged at the end of the piston rod extending out of the hydraulic cylinder; the side pressing roller is coaxial with the piston rod, and the end surface of the side pressing roller contacts the thickness surfaces on both sides of the bamboo.

6. The semicircular bamboo material inner-node-removing and unfolding continuous equipment according to claim 1, characterized in that: The tangential pressing device includes a second hydraulic cylinder hinged on the frame and a second side pressing roller. A rotatable second side pressing roller is arranged at the end of the second piston rod extending out of the second hydraulic cylinder; the outer circumference of the second side pressing roller contacts the thickness surfaces on both sides of the bamboo, and the rotation axis of the second side pressing roller is perpendicular to the bamboo axis.

7. The semi-circular bamboo material inner-node removing and unfolding continuous equipment according to claim 1, characterized in that: The pressing device includes two pressing oil cylinders arranged on both sides of the bamboo green surface in the radial direction of the bamboo. A rolling pressing roller is arranged at the end of the piston rod of the pressing oil cylinder. The outer circumference of the pressing roller contacts the bamboo green surface, and the rolling axis of the pressing roller is perpendicular to the bamboo axis.

8. The semi-circular bamboo material inner-node-removing and unfolding continuous equipment according to claim 7, characterized in that: The number of the pressing devices corresponds to the cutter head. The two pressing rollers of each pressing device and the outer sleeve of the disc in a cutter head are located on the same cross-section of the bamboo.

9. The semicircular bamboo material inner node removing and unfolding continuous equipment according to claim 1, characterized in that: The lifter is a lifting oil cylinder or an electric cylinder. The piston rod of the lifting oil cylinder or the push rod of the electric cylinder is connected to the outer sleeve of the disc.

10. The semicircular bamboo material inner node removing and unfolding continuous equipment according to claim 1, characterized in that: It further includes a guiding device arranged on the frame. The guiding device is between the semi-circular bamboo conveying to the inner node device and the semi-circular bamboo flattening device; the guiding device includes a jacking oil cylinder or an electric cylinder. A rolling jacking roller is arranged at the end of the piston rod of the jacking oil cylinder or the end of the push rod of the electric cylinder. The rolling axis of the jacking roller is perpendicular to the bamboo axis; the guiding device is used to jack up the bamboo coming out from the rear end of the semi-circular bamboo conveying to the inner node device, so that the bamboo green surface of the bamboo entering the front end of the semi-circular bamboo flattening device contacts the lower surface of the workbench surface.

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