Half-round bamboo de-knotting and continuous spreading equipment

Abstract

The application provides a semi-circular bamboo internal node removal and flattening continuous equipment, which can continuously remove and flatten the semi-circular bamboo internal node, and has the advantages of clean internal node removal without residue, no cracking and no notch on the bamboo sheet, and improved bamboo utilization rate. The equipment comprises a conveying internal node removal device and a flattening device. The conveying internal node removal device comprises a power roller device, a cutter disc, and a pressing device. The cutter disc comprises a disc sleeve, a rotating disc, a rotating cutter, and a lifter. The power roller device drives the bamboo to move from front to back. The rotating disc rotates relative to the disc sleeve. The outer end of the rotating cutter hinged to the rotating disc is a cutting edge. The lifter drives the disc sleeve to top the bamboo yellow surface. The flattening device comprises a gradually changing workbench surface, radial pressing devices, tangential pressing devices, and a conveying system. The gradually changing workbench surface gradually flattens from the feeding end to the discharging end. Multiple radial pressing devices are arranged below the workbench surface to realize notch-free flattening of the bamboo arc surface. The tangential pressing devices apply pressure to the thickness surfaces on both sides of the bamboo along the tangential direction of the bamboo arc.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of removing internal nodes and flattening bamboo, in particular to a semi-circular bamboo removing internal nodes and flattening continuous equipment. BACKGROUND

[0002] There are domestic research patents for removing internal nodes of transversely flattened bamboo, and the length of the semi-circular bamboo is short, so the selected bamboo is close to the root section with the largest diameter, the length is small, the diameters of the two ends of the bamboo are almost the same, and the removal of internal nodes is easy to achieve by mechanical equipment. For conventional longitudinal bamboo flattening, the internal node removal part is set to be independent and separated, that is, the internal node removal work is large and the efficiency is low, and the internal node is partially left, which is not good. The longitudinal flattening also adopts rolling and scoring on the bamboo yellow surface, which causes large loss of bamboo meat and low utilization rate of bamboo. SUMMARY

[0003] The present application provides a semi-circular bamboo removing internal nodes and flattening continuous equipment, which can continuously remove internal nodes and flatten the whole length of semi-circular bamboo, is not limited by the length of the bamboo, has high work efficiency, and removes the internal nodes completely without residues, the flattened bamboo pieces are free of cracking and scoring, and the utilization rate of the bamboo is improved.

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

[0005] The semi-circular bamboo removing internal nodes and flattening continuous equipment comprises a semi-circular bamboo conveying internal node removal device and a semi-circular bamboo flattening device.

[0006] The semi-circular bamboo conveying internal node removal device comprises a power roller device, an internal node removal cutter head, and a pressing device.

[0007] The power roller device comprises a plurality of rollers arranged at intervals on the rack and capable of being driven to rotate to support the semi-circular bamboo with the bamboo yellow surface downward, so as to drive the softened bamboo to move along the axis from the front end to the rear end.

[0008] A plurality of internal node removal cutter heads are arranged from front to back, each cutter head comprises a disc sleeve, a rotating disc, a rotating knife, and a lifter; the rotating disc is arranged at the front end of the disc sleeve and is driven by the rotating disc driving device to rotate relative to the disc sleeve, the inner end of the rotating knife is hinged to the rotating disc, and the outer end of the rotating knife is a knife edge extending forward and backward, which extends outward from the outer periphery of the disc sleeve by about 0.2-0.5mm in the radial direction of the rotating disc; the diameter of the disc sleeve in each cutter head gradually increases from front to back; the lifter arranged on the rack is connected with the disc sleeve to drive the disc sleeve to top the bamboo yellow surface of the semi-circular bamboo.

[0009] The compacting device is used for compacting the bamboo in the radial direction of the bamboo green surface of the bamboo, so that the thickness surfaces on both sides of the bamboo are compacted on the roller, and the bamboo yellow surface of the bamboo is convenient to adhere to the top of the disc sleeve for removing the inner node;

[0010] The semi-circular bamboo flattening device comprises a gradually changing workbench surface, radial pressure devices, tangential pressure devices and a conveying system arranged on a rack;

[0011] The workbench surface is gradually changing, the front end, i.e. the feeding end, is a semi-circular arc, and the circular arc gradually flattens when extending to the rear end, i.e. the discharging end, until the discharging end is completely flat. The conveying system 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 or the upper rollers to rotate. Each pair of rollers comprises 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. The bamboo passes between the lower roller and the upper roller of each pair of rollers and is compacted 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 convey and flatten the semi-circular bamboo during the flattening process.

[0012] The radial pressure device comprises a circular arc-shaped compression ring and a plurality of small compression rollers rotatably arranged on the compression ring.

[0013] The outer convex surface of the bamboo, i.e. the bamboo green surface, is adhered to the lower surface of the workbench. A plurality of radial pressure devices are arranged below the workbench from front to back. The gap between the small compression rollers and the opposite lower surface of the workbench is not greater than the thickness of the bamboo. Alternatively, the outer convex surface of the bamboo, i.e. the bamboo green surface, is adhered to the upper surface of the workbench. A plurality of radial pressure devices are arranged above the workbench from front to back. The gap between the small compression rollers and the opposite upper surface of the workbench is not greater than the thickness of the bamboo.

[0014] The arc shape of the compression ring in the radial pressure device changes from small to large along with the change of the arc surface of the workbench from small to large. The purpose of arranging the radial pressure device is to tightly adhere the semi-circular arc-shaped bamboo to the workbench and flatten the arc surface of the bamboo.

[0015] A plurality of tangential pressure devices are symmetrically arranged on both sides of the workbench from front to back. The symmetric tangential pressure devices act on the thickness surfaces on both sides of the bamboo and press the bamboo in the tangential direction of the circular arc of the bamboo, so as to press the bamboo in the circumferential direction together with the workbench.

[0016] As an improvement, a conical cutter extending forward is arranged on the rotating disc in the cutter head at the most front position, a drill extending forward is arranged on the conical cutter, and the rotating disc, the conical cutter and the drill are coaxial.

[0017] As an improvement, the pressing device comprises two pressing oil cylinders arranged on both sides of the bamboo green side in the radial direction of the bamboo, and the pressing roller at the end of the pressing oil cylinder piston rod can roll, and the outer periphery of the pressing roller is in contact with the bamboo green side, and the rolling axis of the pressing roller is perpendicular to the axis of the bamboo.

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

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

[0020] As an improvement, the outer periphery of the disc sleeve is a conical surface with a large front and a small back, which is consistent with the taper of the round bamboo in the feeding direction, so that the outer periphery of the disc sleeve is tightly attached to the bamboo yellow side.

[0021] As an improvement, it also includes a guide device arranged between the half-round bamboo conveying and internal node device and the half-round bamboo flattening device; the guide device comprises a lifting oil cylinder or an electric cylinder, and a lifting roller arranged on the upper part of the piston rod of the lifting oil cylinder or the push rod of the electric cylinder can roll, and the rolling axis of the lifting roller is perpendicular to the axis of the bamboo; the guide device is used to lift the bamboo coming out of the rear end of the half-round bamboo conveying and internal node device upward, so that the bamboo green side of the bamboo entering the front end of the half-round bamboo flattening device is in contact with the lower surface of the workbench surface.

[0022] As an improvement, when the outer convex surface of the bamboo, i.e. the bamboo green side, is attached to the lower surface of the workbench surface, the outer periphery of the upper roller in the conveying device is a concave arc surface along the rolling axis direction, the outer periphery of the lower roller is a convex arc surface along the rolling axis direction, the concave arc surface of the upper roller is flush with the arc surface of the lower surface of the workbench, and from the feeding end to the discharging end, the length of the generatrix of the concave arc surface of the upper roller and the length of the generatrix of the convex arc surface of the lower roller in each pair of rollers gradually increase, and the arc line also gradually flattens; preferably, a groove is arranged on the concave arc surface of the upper roller in the conveying device, the extension direction of the groove is consistent with the rolling axis direction of the upper roller, and the lower roller is a driven roller connected with the conveying driving device and made of temperature-resistant rubber or plastic material.

[0023] As an improvement, when the outer convex surface of the bamboo, i.e. the bamboo green side, is attached to the lower surface of the workbench surface, the outer periphery of the upper roller in the conveying device is a concave arc surface along the rolling axis direction, the outer periphery of the lower roller is a convex arc surface along the rolling axis direction, the concave arc surface of the upper roller is flush with the arc surface of the lower surface of the workbench, and from the feeding end to the discharging end, the length of the generatrix of the concave arc surface of the upper roller and the length of the generatrix of the convex arc surface of the lower roller in each pair of rollers gradually increase, and the arc line also gradually flattens; preferably, a groove is arranged on the concave arc surface of the upper roller in the conveying device, the extension direction of the groove is consistent with the rolling axis direction of the upper roller, and the lower roller is a driven roller connected with the conveying driving device and made of temperature-resistant rubber or plastic material.

[0024] 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 surface.

[0025] As an improvement, an elastic element is arranged between the compression ring and the frame, which makes the compression ring close to the workbench surface in normal state, and each small compression roller compresses the bamboo on the workbench surface.

[0026] 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 the compression roller shaft close to the workbench surface in normal state, each small compression roller compresses the bamboo on the workbench surface, and the expansion of the arc surface of the bamboo is realized.

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

[0028] As an improvement, the tangential compression device comprises a hydraulic cylinder hinged to the frame and a side compression roller, and the end of the piston rod of the hydraulic cylinder is arranged to rotate the side compression roller; the side compression roller is coaxial with the piston rod, and the end surface of the side compression roller is in contact with the thickness surface of the bamboo on both sides.

[0029] As an improvement, the tangential compression device comprises a hydraulic cylinder two hinged to the frame and a side compression roller two, and the end of the piston rod two of the hydraulic cylinder two is arranged to rotate the side compression roller two; the outer periphery of the side compression roller two is in contact with the thickness surface of the bamboo on both sides, and the rotation axis of the side compression roller two is perpendicular to the axis of the bamboo.

[0030] 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 the hydraulic cylinder two, and when the side compression roller and the side compression roller two are in contact with the thickness surface of the bamboo on both sides and apply pressure, the hydraulic oil pressure remains unchanged.

[0031] As an improvement, it further comprises a photoelectric detection device arranged in front of each tangential compression device, which is used to detect the chord height of the semicircular bamboo about to enter the workbench surface where the tangential compression device is located; 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 and the hydraulic cylinder two, the hydraulic valve is arranged on the hydraulic pipeline communicated with the hydraulic cylinder and the hydraulic cylinder two; the controller controls the extension and retraction of the piston rod of the hydraulic cylinder and the piston rod two of the hydraulic cylinder two according to the chord height of the semicircular bamboo; when the bamboo does not reach the workbench surface where the side compression roller and the side compression roller two are located, the piston rod and the piston rod two are in the retracted state and will not hinder the movement of the bamboo; when the bamboo reaches the workbench surface where the side compression roller and the side compression roller two are located, the piston rod and the piston rod two are extended, and the thickness surface of the bamboo is pressed by the side compression roller and the side compression roller two.

[0032] The beneficial effects of the present application are:

[0033] The half-round bamboo conveying and node-removing device is composed of a power roller device, a plurality of node-removing (bamboo diaphragm) cutter discs with different diameters added between the rollers, and a pressing device.

[0034] The pressing device and the disc sleeve in the cutter disc press the bamboo to prevent the half-round bamboo from vibrating during the cutting process.

[0035] The cutting edge of the rotary cutter extends about 0.2-0.5 mm beyond the periphery of the disc sleeve, and a layer of bamboo yellow on the inner side of the round bamboo is removed at the same time. When the small head of the half-round bamboo with a small diameter passes through the first cutter disc at the front, the bamboo node and bamboo yellow of the small head are cleanly removed, and as the diameter of the bamboo increases as it moves forward, the bamboo passing through the first cutter disc can only remove the circular arch-shaped hole from the center of the bamboo diaphragm to the bamboo yellow surface consistent with the diameter of the disc sleeve, and the bamboo yellow and bamboo node cannot be completely removed. As the bamboo moves forward, when it reaches the position of the next cutter disc, the cutter disc with a larger diameter at the position is raised by the lifter to abut against the bamboo yellow surface and press the half-round bamboo together with the pressing device, and the rotary cutter in the cutter disc removes the residual bamboo node on the inner wall of the bamboo and removes a layer of bamboo yellow. This process is repeated to completely remove all bamboo yellow and bamboo nodes in the bamboo.

[0036] Due to the limitation of the disc sleeve, the rotary cutter only extends a small length (0.2-0.5 mm) beyond the disc sleeve, and it is impossible to cut into more bamboo flesh parts of the bamboo, which is more convenient for the rotary cutter in the cutter disc to accurately remove the inner node of the bamboo.

[0037] The tapered cutter and drill bit are arranged on the rotary disc in the cutter disc at the front position, which can prevent the rotary cutter from contacting the inner node before cutting the inner node.

[0038] Each pressing device includes two pressing oil cylinders and pressing rollers on both sides of the bamboo green surface. The two pressing rollers in each pressing device are symmetrically distributed above the bamboo, with the concave surface (bamboo yellow surface) of the half-round bamboo facing downward. When the bamboo moves to the node-removing device, the two pressing rollers first press the bamboo, and then the cutter disc is pressed against the bamboo yellow surface by the lifter, and the three fix the half-round bamboo.

[0039] Preferably, the half-round bamboo conveying and node-removing device has a pressure controller, which includes a hydraulic valve and a pressure detection device. The hydraulic valve and the pressure detection device for detecting the pressure of the hydraulic oil are arranged on the oil supply pipeline of the pressing oil cylinder and the lifting oil cylinder, and the pressure detection device, the hydraulic valve, etc. are connected with the controller to ensure that the pressure of the pressing oil cylinder and the lifting oil cylinder remains unchanged when the pressing roller and the disc sleeve contact the bamboo.

[0040] Since the semi-circular bamboo has big and small heads, the big and small heads have certain taper, and the diameter of the bamboo is continuously changed, so a lifter such as a lifting oil cylinder is arranged below each cutter disc, and the pressure of the lifting oil cylinder is set to make the disc sleeve top abut against the bamboo yellow surface, two pressing oil cylinders are arranged above the cutter disc, the end of the piston rod of the pressing oil cylinder is provided with a pressing roller, the two pressing oil cylinders and the disc sleeve are distributed in a circular plane, the gap between the disc sleeve and the pressing roller is the thickness of the bamboo wall, and the pressure of the pressing oil cylinder is set, so that the semi-circular bamboo is fixed by the two pressing rollers and the disc sleeve, and vibration of the semi-circular bamboo during cutting is prevented.

[0041] The outer surface of the disc sleeve is provided as a cone, the taper of the cone is consistent with the taper of the bamboo yellow surface, so that the disc sleeve is better abutted 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 diameter of the bamboo, so that the pressing roller is tightly abutted on the bamboo green surface, and the piston rod of the lifting oil cylinder can automatically extend and retract according to the change of the diameter of the bamboo, so that the disc sleeve is tightly abutted on the bamboo yellow surface.

[0043] Preferably, the semi-circular bamboo conveying and node removing device is provided with a sensing device for detecting nodes, the sensing device is arranged at the rear of the first cutter disc, and is used for detecting whether the bamboo has remaining nodes after passing through the first cutter disc. When the small head of the semi-circular bamboo with a small diameter passes through the first cutter disc at the front, the bamboo joints and bamboo yellow of the small head are cleanly removed, and when the bamboo moves forward, the diameter of the bamboo continuously increases, and the bamboo passing through the first cutter disc can only remove the circular arch hole from the bamboo diaphragm center to the bamboo yellow surface which is consistent with the diameter of the first cutter disc sleeve, and the bamboo yellow and the bamboo joints cannot be completely removed. With the forward movement of the bamboo, when the bamboo reaches the position of the next cutter disc, the sensing device arranged below the bamboo for detecting the bamboo joints monitors that the inner wall of the bamboo has no bamboo yellow and nodes, and then the bamboo continuously passes through, and when the sensing device senses that there are bamboo joints, the cutter disc with a larger diameter at the position is lifted to abut against the bamboo yellow surface under the action of the lifting oil cylinder, and the semi-circular bamboo is tightly pressed by the two pressing oil cylinders above, the rotating cutter in the cutter disc removes the residual bamboo joints on the inner wall of the bamboo, and removes a layer of bamboo yellow. This is repeated to completely remove all the bamboo yellow and bamboo joints in the bamboo.

[0044] The guiding device is located between the node removing power roller device and the flattening workbench, and is composed of a jacking oil cylinder and a jacking roller. Since the bamboo is fed from the small head first, the diameter is small, and the feeding end of the workbench surface is a semi-circular arc with a larger diameter, and the arc top position is higher, when the small head of the bamboo enters below the workbench surface, it is difficult to automatically abut against the concave surface of the workbench surface, at this time, the piston rod of the jacking oil cylinder is lifted to lift the bamboo, so that the bamboo green surface is in contact with the concave surface of the workbench surface.

[0045] The softened bamboo with the half-circular shape and without the inner node is sent to the workbench from the feeding end of the workbench and is clamped by a pair of rollers, i.e. the lower roller and the upper roller, close to the feeding end. Then, the bamboo is moved along the workbench from front to back under the action of the upper and lower roller conveying system. During the movement, the outer arc surface (the bamboo green surface) of the bamboo is always attached to the lower 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 will be stretched during the radial rolling and flattening of the bamboo by the small 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 in pressurizing the circumferential direction of the bamboo arc. That is, the tangential direction of the bamboo arc is pressurized 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.

[0046] The workbench is a non-planar structure, one end (the head end, the feeding end) of which is a semicircular arc, and the arc gradually flattens as it extends to the other end (the tail end, the discharging end) until it is completely flat. A plurality of openings are provided in the workbench, and a pair of conveying and rolling rollers is provided above and below each opening. The length of the upper roller is in the middle of the concave surface, and the concave surface of the upper roller is provided with a groove, the length direction of which 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 concave surface of the upper roller is flush with the lower surface of the workbench, and the lower roller is made of temperature-resistant rubber or plastic material (because the softened half-circular bamboo is in a high temperature state). The length of the roller at the feeding end is small, and the length of the roller gradually increases from the feeding end to the tail end as the bamboo arc gradually flattens. 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 bamboo.

[0047] The gap distance between the small press roller on the pressure ring and the lower surface of the workbench surface is not greater than the thickness of the bamboo material, facilitating the passage of the arc-shaped bamboo material through the gap while being able to exert a certain pressure on the bamboo material to make the bamboo material adhere to the arc surface of the workbench, realizing the gradual expansion of the arc surface of the bamboo material. The curvature of the pressure ring at different front and rear positions below the workbench surface is also variable, but the arc surface at the lower surface of the workbench opposite each pressure ring is a concentric circle, and the small press roller and the workbench surface together limit the arc shape of the bamboo material. When the bamboo material passes through the gap from the circular arc end (feeding end) of the workbench surface to the tail end, it will change along with the change of the arc shape between the arc surface of the workbench and the small press roller on the pressure ring, and finally be pressed into a planar shape. The pressure ring can exert pressure on different bamboo materials, so that the bamboo material is pressed and adhered to the arc-shaped workbench surface as soon as it enters the workbench surface, so that the bamboo material is in an expanded state. Due to the thickness difference of the bamboo wall, the thin wall of the bamboo material near the bamboo tip, and the thick wall of the bamboo material near the bamboo root, if the gap distance is constant, the radial pressure on the bamboo material will change with the change of the thickness of the bamboo material, and it is possible that the thin-walled bamboo material 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 thin-walled bamboo material can also be well adhered to the changing workbench surface.

[0048] The bamboo material also has a sharp degree, and the diameter and chord height of the semicircular bamboo material change with the length, and the arc length and chord height near the bamboo root are large, and the arc near the bamboo tip is short and the chord height is small. In order to be able to exert effective tangential force on the side surface (thickness surface) of the bamboo material, the hydraulic cylinder of the tangential pressure device is provided with an oil pressure detection control device (such as a pressure gauge and a control valve), and when the diameter of the bamboo arc is large, the length of the piston rod extending is short, and vice versa. The oil pressure detection control device can sense the pressure change according to the change of the arc chord height of the bamboo material contacted by the side pressure roller, and realize continuous and effective tangential pressure on the bamboo wall.

[0049] The diameters of different bamboo materials are variable, when a bamboo material passes through a certain tangential pressing device, the next bamboo material will pass through the position of the device, due to the diameter difference of the bamboo material, the chord height of the semicircular bamboo material is different, in order to not hinder the next bamboo material to move to the position of the workbench surface of the tangential pressing device and pass through smoothly, the tangential pressing device is required to be lifted (contracted) in time in advance, and after the next bamboo material moves to the position of the workbench surface of the tangential pressing device, the tangential pressing device can quickly press upward to press the side (thickness surface) of the bamboo material. Therefore, photoelectric detection devices for detecting the chord height of the semicircular bamboo material about to enter the front end of the workbench surface are arranged in front of the front end of the workbench surface, and the controller controls the extension and contraction of the piston rod of the hydraulic cylinder according to the chord height of the semicircular bamboo material. Photoelectric detection devices are also arranged in front of the positions of other tangential pressing devices, and the purpose is the same. The falling and pressing time of each tangential pressing device is set, so that the tangential pressing devices at different positions can be sequentially contracted and then quickly pressed upward.

[0050] The tangential pressing devices are not all arranged vertically upward, and the pressing directions of the tangential pressing devices at different positions change with the change of the arc of the workbench surface, from the vertical placement at the feeding end, the vertical pressing of the bamboo material, to the gradual change into a plane at the discharging end along the arc of the bamboo piece, and the pressing device is also approximately horizontally placed, and the bamboo material is approximately horizontally pressed.

[0051] The conveying device is composed of a plurality of pairs of upper and lower rollers, the length direction of the upper roller is a concave arc, the concave arc of the upper roller near the feeding end of the workbench surface 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 lower roller and the upper roller is the thickness of the bamboo material, and the length of the roller at different positions from the feeding end to the discharging end continuously increases.

[0052] Bamboo softening belongs to conventional technology, and the softening temperature and time are well known, and after softening, the bamboo pith is removed, so that the bamboo material can be smoothly conveyed and moved along the workbench surface.

[0053] The present application can continuously remove the pith of the semicircular whole long bamboo material without cracks and expand it, improve the utilization rate of the bamboo material, and the process is continuous, can be mechanized, has high operation efficiency, and reduces the labor workload. The bamboo pith is completely removed without residue, and the loss of bamboo flesh is small, and the utilization rate of the bamboo material is high. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 It is a front view schematic diagram of the semicircular bamboo material flattening device.

[0055] Figure 2 It is a bottom view schematic diagram of the semicircular bamboo material flattening device.

[0056] Figure 3Fig. 1 is a schematic view of the workbench, tangential pressing device, etc. from the front to the rear cross-section of different positions.

[0057] Figure 4 Fig. 2 is a schematic view of the workbench, radial pressing device, etc. from the front to the rear cross-section of different positions.

[0058] Figure 5 Fig. 3 is a schematic view of the side of the semi-circular bamboo flattening device (feeding end).

[0059] Figure 6 Fig. 4 is a schematic view of the tangential pressing device pressing the thickness of the bamboo.

[0060] Figure 7 Fig. 5 is a schematic view of the lower roller and the upper roller from the front to the rear cross-section of different positions.

[0061] Figure 8 Fig. 6 is a schematic view of the semi-circular bamboo conveying and node removing device.

[0062] Figure 9 Fig. 7 is a side view of the first cutter head, etc.

[0063] Figure 10 Fig. 8 is a front view of the first cutter head, etc.

[0064] Figure 11 Fig. 9 is a schematic view of the semi-circular bamboo node removing and flattening continuous equipment.

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

[0066] 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,

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

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

[0069] the frame 16,

[0070] the bamboo 1000, the thickness of the bamboo 1001, the node 1002, the residual node 1003,

[0071] the semi-circular bamboo conveying and node removing device 500,

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

[0073] A guiding device 9, a jacking oil cylinder 91, a jacking roller 92. DETAILED DESCRIPTION

[0074] The specific embodiments of the present application are further described below with reference to the accompanying drawings:

[0075] Example 1: Semi-circular bamboo de-knotting and flattening continuous equipment

[0076] Referring to Figure 11 The semi-circular bamboo de-knotting and flattening continuous equipment of Example 1 is composed of a semi-circular bamboo conveying and de-knotting device 500, a guiding device 9, and a semi-circular bamboo flattening device 100.

[0077] Referring to Figures 8-10 The semi-circular bamboo conveying and de-knotting 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 apart on a frame and can be actively rotated to support the bottom of both sides of the semi-circular bamboo 1000 with the yellow side facing down, so as to drive the softened bamboo 1000 to move along the axis from the front end to the rear end.

[0079] A plurality of cutter heads 6 are arranged from front to back, each cutter head 6 includes a disc sleeve 61, a rotating disc 62, a rotating cutter 63, and a lifter 64. The rotating disc 62 is rotationally arranged at the front end of the disc sleeve 61 and is driven by a rotating disc driving device to rotate the rotating disc 62 relative to the disc sleeve 61. The inner end of the rotating cutter 63 is hinged to the rotating disc 62, and the outer end of the rotating cutter 63 is a blade extending forward and backward. In the radial direction of the rotating disc 62, the blade extends about 0.2-0.5mm out of the outer periphery of the disc sleeve 61. From front to back, the diameter of the disc sleeve 61 in each cutter head gradually increases. The lifter 64 is a lifting oil cylinder 641, the lifting oil cylinder piston rod is connected with the disc sleeve 61, and the cylinder body of the lifting oil cylinder is connected to the frame. The lifting oil cylinder 641 drives the disc sleeve 61 to be in close contact with the yellow surface of the semi-circular bamboo 1000.

[0080] On the rotating disc 62 of the cutter head at the most front position, a conical cutter 65 extending forward is arranged, and a drill bit 66 extending forward is arranged on the conical cutter 65, and the rotating disc 62, the conical cutter 65, and the drill bit 66 are coaxial.

[0081] The rotating disc driving device can be a motor or the like directly arranged on the disc sleeve 61, in which case the rotating disc driving device and the disc sleeve 61 are lifted together under the driving of the lifting oil cylinder 641. The rotating disc driving device, such as a motor, can also be arranged on the frame, referring to Figure 8At this time, the motor is connected with the rotating disc 62 through the belt transmission mechanism composed of the pulley 81 fixed on the rotating disc, the pulley fixed on the motor output shaft, the belt 82 and the tension pulley, and the lifting oil cylinder 641 only drives the lifting of the disc sleeve 61 and the rotating disc 62, and the motor does not lift, so that the tension pulley and the like are needed to tension the belt and adapt to the distance change 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 for pressing the bamboo 1000 in the radial direction of the bamboo, so that the bamboo yellow surface of the bamboo is attached to the top of the disc sleeve 61, and the bottom of the bamboo 1000 is pressed on 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, 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 rolling pressing roller 72, the outer periphery of the pressing roller 72 is in contact with the bamboo green surface, and the rolling axis of the pressing roller 72 is perpendicular to the axis of the bamboo.

[0083] The number of the pressing device is the same as that of the cutter head, and the two pressing rollers 72 of each pressing device and the disc sleeve 61 in the cutter head are located on the same cross section of the bamboo.

[0084] The outer periphery of the disc sleeve 61 is a conical surface which is large in front and small at back.

[0085] 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 and the lifting oil cylinder 641, and 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 71 and the lifting oil cylinder 641 is unchanged when the pressing roller 72, the disc sleeve and the bamboo are in contact.

[0086] The sensing device for detecting the inner joint is arranged at the rear of the first cutter head, and is used for detecting whether the bamboo has residual inner joint 1003 after passing through the first cutter head.

[0087] Referring to Figure 11 The guide device 9 is arranged between the half-circular bamboo conveying-to-inner joint device 500 and the half-circular bamboo flattening device 100. The guide device 9 includes a lifting oil cylinder 91 with the cylinder body arranged on the rack, and a rolling lifting roller 92 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 guide device is used for lifting the bamboo 1000 coming out of the rear end of the half-circular bamboo conveying-to-inner joint device upward, so that the bamboo green surface of the bamboo 1000 entering the front end of the half-circular bamboo flattening device is in contact with the lower surface of the workbench surface.

[0088] The half-round bamboo conveying and node removing device is composed of a power roller device, a plurality of 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, with the concave surface (bamboo yellow surface) of the half-round bamboo facing downward. When the bamboo moves to the node removing device, the two pressing rollers first press the bamboo, and then the cutter disc under the action of the lifter pushes the bamboo against the bamboo yellow surface, and the three fix the half-round bamboo. The cutter disc contains a plurality of rotating node removing (bamboo diaphragm) rotating knives.

[0089] The diameter of the disc sleeve in each cutter disc increases from the feeding end to the discharging end. Except that the frontmost cutter disc closest to the feeding end of the roller is provided with a conical knife and a drill bit, no conical knife and drill bit are provided in the other cutter discs.

[0090] The diameter (disc sleeve diameter) of the cutter disc near the feeding end of the roller is the smallest, the disc sleeve contacts the bamboo yellow curved surface, and the blades of the plurality of rotating knives such as 4 rotating knives on the rotating disc extend about 0.2-0.5mm out of the disc sleeve.

[0091] Since the semi-circular bamboo material has large and small heads with certain taper, the diameter of the bamboo material is continuously changed, so a lifter such as a lifting oil cylinder is arranged below each cutter disc, and the pressure of the lifting oil cylinder is set to make the disc sleeve top abut against the bamboo yellow surface of the semi-circular bamboo material. Two pressing oil cylinders are arranged above the cutter disc, and the end of the piston rod of the pressing oil cylinder is provided with a pressing roller. The two pressing oil cylinders and the disc sleeve are distributed in a circular plane, and the gap between the disc sleeve and the pressing roller is the thickness of the bamboo wall. The pressure of the pressing oil cylinder is set, and the semi-circular bamboo material is fixed by the two pressing rollers and the disc sleeve, which can prevent the semi-circular bamboo material from vibrating during cutting. Since the disc sleeve is limited, the rotating cutter only extends a small length out of the disc sleeve, and it is impossible to cut more bamboo meat part of the bamboo material. It is more convenient for the rotating cutter in the cutter disc to accurately remove the bamboo node 1002 in the bamboo material. The outer surface of the disc sleeve is provided as a cone, the taper of the cone is consistent with the taper of the bamboo yellow surface, so that the disc sleeve is better abutted with the bamboo yellow surface. The pressing oil cylinder is also provided with a pressure controller, which can automatically extend and retract the piston rod of the pressing oil cylinder according to the change of the diameter of the bamboo material, so that the pressing roller is tightly abutted on the bamboo green surface. The lifting oil cylinder is also arranged below the disc sleeve, and the lifting oil cylinder is also provided with a pressure controller. Under the control of the pressure controller, the piston rod of the lifting oil cylinder can automatically extend and retract according to the direct change of the diameter of the bamboo material, so that the disc sleeve is tightly abutted on the bamboo yellow surface. The drill bit is at the forefront of the cutter disc, which can drill a hole in the bamboo partition. The subsequent conical cutter rotates to enlarge the hole, and the remaining bamboo partition (residual bamboo node 1003) connected to the bamboo yellow surface is removed by a plurality of rotating cutters. The cutting edge of the rotating cutter extends about 0.2-0.5mm out of the outer periphery of the disc sleeve, which removes the bamboo yellow on the inner side of the round bamboo while removing the inner node. When the small head of the semi-circular bamboo material with a smaller diameter passes through the first cutter disc at the forefront, the bamboo node and the bamboo yellow of the small head will be cleanly removed. When the large head of the bamboo material moves forward, the diameter of the bamboo material continuously increases, and the bamboo material passing through the first cutter disc can only remove the circular arch-shaped hole from the center of the bamboo diaphragm to the bamboo yellow surface with the diameter consistent with the disc sleeve of the first cutter disc, and the bamboo yellow and the bamboo node cannot be completely removed. As the bamboo material moves forward to the next cutter disc position, under the monitoring of the sensing device arranged below the bamboo material for detecting the bamboo node, if the inner wall of the bamboo material is sensed to have no bamboo yellow and inner node, it will continue to pass through. If the bamboo node is sensed to exist, the cutter disc with a larger diameter at this position is lifted to abut against the bamboo yellow surface under the action of the lifting oil cylinder, and the semi-circular bamboo material is tightly pressed by the two pressing oil cylinders above. The rotating cutter in the cutter disc removes the residual bamboo node 1003 on the inner wall of the bamboo material and removes a layer of bamboo yellow. This is repeated to remove all the bamboo yellow and bamboo nodes in the bamboo material.

[0092] The guiding device is located between the power roller device and the front of the workbench, and is composed of a lifting cylinder and a lifting roller. Since the bamboo material is fed from the small end first, the diameter is small, and the feeding end of the workbench is a semicircular arc with a larger diameter and a higher arc top. When the small end of the bamboo material enters the lower part of the workbench, it is difficult to automatically fit onto the concave surface of the workbench. At this time, the lifting cylinder piston rod is lifted to lift the bamboo material, so that the bamboo green surface is in contact with the concave surface of the workbench.

[0093] Referring to Figure 11 、 1 -5, the semicircular bamboo flattening device 100 is used to expand the whole long semicircular bamboo 1000 to improve the utilization width and utilization rate of the bamboo material. It includes a rack 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 rack.

[0094] The front end, i.e. the feeding end 11 of the progressive workbench 1 is a semicircular 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.

[0095] The conveying system 4 for driving the bamboo material to move from front to back includes a plurality of pairs of rollers and a conveying drive 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 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 surface 44, and the concave surface of the upper roller is flush with the arc surface of the lower surface of the workbench. The concave surface 44 of the upper roller is provided with a groove, and the extension direction of the groove is consistent with the rolling axis direction of the upper roller. The lower roller 41 is preferably supported by an elastic element (such as a spring) in a state of floating up and down and pressing the bamboo material 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 material.

[0096] 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 increases. The lower roller 41 is a driving roller connected to the conveying drive device and is made of temperature-resistant elastic rubber or temperature-resistant plastic material.

[0097] The outer convex (green bamboo) surface of the bamboo 1000 is attached to the lower surface (inner concave surface) of the workbench surface 1, and the bamboo 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 outer convex (green bamboo) surface of the bamboo 1000 is in contact with the concave arc surface 44 of the upper roller 42, and the inner concave (yellow bamboo) 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, with the length of the generatrix being shortest near the feeding end, and as the bamboo progresses 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 increase, with the length of the generatrix being longest near the discharging end.

[0098] A plurality of radial pressing devices 2 are provided below the workbench surface from front to back. The radial pressing device includes a circular 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 sequentially connected by a plurality of pressing roller shafts 23, and a small pressing roller 22 is provided 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 provided between each pressing rod and the rack, which in normal state causes each pressing rod 24 and pressing roller shaft 23 to approach the upper surface of the workbench surface, and each small pressing roller 22 presses the bamboo tightly on the upper surface of the workbench surface. Each pressing ring is basically arc-shaped, and the arc surface at the lower surface of the workbench surface opposite to the pressing ring is basically concentric.

[0099] A plurality of tangential pressing devices 3 are symmetrically provided on both sides of the workbench surface from front to back, and the symmetric tangential pressing devices act on the thickness surface at both ends of the arc line of the bamboo cross section, and press the bamboo in the tangential direction of the bamboo arc. The tangential pressing device 3 includes a hydraulic cylinder 31 with its lower end hinged to the rack on both sides of the workbench surface, a hydraulic pipeline provided with a hydraulic valve, an oil pressure detection control device for detecting and controlling the hydraulic oil pressure in the hydraulic cylinder, and a side pressing roller 33. The end of the piston rod 32 of the hydraulic cylinder 31 is rotatably provided with a rotatable side pressing roller 33; 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 1000, the outer peripheral surface of the side pressing roller is in contact with 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 is in contact with the thickness surface 1001 of the bottom side surface of the bamboo 1000.

[0100] Of course, other structures of tangential pressurizing devices can also be used. For example, another tangential pressurizing device includes a hydraulic cylinder two hinged at the lower end of the cylinder body to a frame located on both sides of the workbench surface, a hydraulic pipeline provided with a hydraulic valve, an oil pressure detection control device for detecting and controlling the hydraulic oil pressure in the hydraulic cylinder two, and a side press roller two. The end portion of the piston rod two of the extended hydraulic cylinder two is fixed to a bracket two, the shaft of the side press roller two is fixed to the bracket two, and the side press roller two is rotatably arranged on the shaft of the side press roller two. The outer periphery of the side press roller two is in contact with the thickness surface 1001 on both sides of the bamboo, and the rotation axis of the side press roller two is perpendicular to the axis of the bamboo.

[0101] A photoelectric travel switch as a photoelectric detection device is arranged in front of the front end of the workbench surface to detect the chord height and arrival time of the semicircular bamboo 1000 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 for controlling the operation of the hydraulic cylinder and the hydraulic cylinder two. According to the chord height and arrival time of the semicircular bamboo, the controller controls the extension and retraction of the piston rod 32 of the hydraulic cylinder 31 and the piston rod two of the hydraulic cylinder two. When the bamboo 1000 has not reached the workbench surface where the side press roller 33 and the side press roller two are located, the piston rod 32 and the piston rod two are in the retracted state and do not hinder the movement of the bamboo. When the bamboo reaches the workbench surface where the side press roller 33 and the side press roller two are located, the piston rod 32 and the piston rod two are extended, and the thickness surface 1001 of the bamboo is pressurized by the side press roller 33 and the side press roller two. When the side press roller 33 and the side press roller two are in contact with and pressurize the thickness surface on both sides of the bamboo, the hydraulic oil pressure remains unchanged.

[0102] The application provides a semi-circular bamboo material internal node removal and expansion continuous equipment, which can continuously remove internal nodes and expand semi-circular whole bamboo materials once, has high operation efficiency, and can remove internal nodes completely without residues, without notches, and without cracking of bamboo pieces, and improves the utilization rate of bamboo materials, and comprises a semi-circular bamboo material conveying internal node removal device and a semi-circular bamboo material expansion device. The semi-circular bamboo material conveying internal node removal device comprises a power roller device, a cutter disc, and a pressing device; each cutter disc comprises a disc outer sleeve, a rotating disc, a rotating cutter, and a lifter; the power roller device drives the softened bamboo material to move along an axis from a front end feeding end to a rear end discharging end; the rotating disc is rotationally arranged at the front end of the disc outer sleeve and rotates relative to the disc outer sleeve, the inner end of the rotating cutter is hingedly connected to the rotating disc, the outer end of the rotating cutter is a front and rear extending cutter edge, the cutter edge extends out of the periphery of the disc outer sleeve, and the lifter drives the disc outer sleeve to top against the bamboo yellow surface of the semi-circular bamboo material; and the pressing device makes the bamboo yellow surface of the bamboo material top against the top of the disc outer sleeve. The semi-circular bamboo material expansion device comprises a gradually changing workbench surface, a radial pressing device, a tangential pressing device, and a conveying system. The feeding end of the gradually changing workbench surface is a semi-circular arc, the arc gradually flattens when extending to the discharging end, and the discharging end is completely flat; the conveying system comprises a plurality of pairs of rollers and a conveying driving device, a plurality of openings are arranged on the workbench surface from front (the feeding end) to rear (the discharging end), and a pair of rollers is arranged above each opening; a plurality of radial pressing devices are arranged below the workbench surface from front to rear, the pressure rings in the radial pressing devices also change from small to large along with the change of the arc surface of the workbench surface, the radial pressing devices realize expansion of the arc surface of the bamboo material, the radial pressing device comprises a circular arc pressure ring and a plurality of rotating small pressure rollers arranged on the pressure ring, the gap between the small pressure rollers and the opposite lower surface of the workbench surface 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 surface from front to rear, the tangential pressing devices apply pressure to the thickness surfaces on both sides of the bamboo material along the tangential direction of the bamboo arc, and the tangential pressing devices and the workbench surface realize circumferential pressing of the arc bamboo material together, so that the bamboo yellow surface is prevented from cracking due to uneven stretching of the arc surface in the expansion process.

[0103] Embodiment 2: Semi-circular bamboo material internal node removal and expansion continuous equipment

[0104] The main difference between embodiment 2 and embodiment 1 is that the semi-circular bamboo material expansion device in embodiment 2 adopts the semi-circular bamboo material expansion device described in the specific implementation part (including the specification drawings) of the patent application with the application number 2024114721663, the publication number CN119036588A, and the publication date November 29, 2024.

[0105] The guiding device in embodiment 1 is not used in embodiment 2.

[0106] In embodiment 2, a turning device (not in embodiment 1) is located between the half-round bamboo flattening device and the half-round bamboo conveying-to-knot device, which is used to turn the bamboo coming out of the rear end of the half-round bamboo conveying-to-knot device upside down by 180° and then convey it, so that the bamboo with the skin facing down enters the half-round bamboo flattening device, and the skin of the bamboo can contact the upper surface of the workbench. Obviously, the turning device can be various, for example, it can be two upper and lower clamping plates that can move relative to each other, the bamboo coming out of the half-round bamboo conveying-to-knot device is pushed into the two clamping plates, the two clamping plates move towards each other to clamp the bamboo, and then the clamping plates rotate around the axis of the bamboo by 180°, so as to turn the bamboo. Then, the two clamping plates move away from each other, so as to release the bamboo. The turned bamboo can enter the half-round bamboo flattening device under the pushing of the subsequent bamboo coming out of the half-round bamboo conveying-to-knot device, and then perform the subsequent flattening process.

[0107] The protection scope of the present application includes but is not limited to the above embodiments, and the protection scope of the present application is subject to the claims, and any replacement, deformation, 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 continuous unfolding equipment for semi-circular bamboo material after removing inner nodes, characterized in that: Includes a semi-circular bamboo material conveying and inner node removal device and a semi-circular bamboo material flattening device; The semi-circular bamboo material conveying and inner section removal device includes a power roller device, an inner section removal cutter disc, and a clamping device; The powered roller device includes multiple rollers that are spaced apart on the frame and supported on both sides of the semi-circular bamboo material with the bamboo core facing down. These rollers are capable of rotating actively to drive the softened bamboo material to move along the axis from the front feed end to the rear discharge end. Multiple cutting discs for removing the inner nodes of semi-circular bamboo are arranged from front to back. Each cutting disc includes a disc outer sleeve, a turntable, a rotary cutter, and a lifting device. The turntable is rotatably located at the front end of the disc outer sleeve and is driven by a turntable drive 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 from front to back. The blade extends 0.2-0.5mm beyond the outer circumference of the disc outer sleeve in the radial direction of the turntable. Along the roller feeding device from front to back, the diameter of the disc outer sleeve in each cutting disc gradually increases. The lifting device, which is set on the frame, is connected to the disc outer sleeve to drive the disc outer sleeve to press against the bamboo core surface of the semi-circular bamboo. The pressing device is used to press the bamboo in the radial direction of the bamboo green surface, and press the thick sides of the semi-circular bamboo onto the roller, so that the bamboo yellow surface of the bamboo can fit into the top of the disc outer sleeve. The semi-circular bamboo flattening device includes a worktable mounted on a frame, a radial pressing device, a tangential pressing device, and a conveying system. The worktable is gradient-shaped, with a semi-circular front end (feed end) that gradually flattens out towards the rear end (discharge end) until the discharge end is completely flat. The conveying system used to move the softened bamboo (with internal nodes removed) from the feed end to the discharge end includes multiple pairs of rollers located on and below the gradient-shaped worktable and a conveying drive device that drives the lower or upper rollers to rotate. Each pair of rollers includes a lower roller and an upper roller. Multiple openings are set on the worktable from front to back, and a pair of rollers is set above and below each opening. The bamboo passes between the lower and upper rollers in each pair of rollers and is pressed by the lower and upper rollers. The purpose of setting up the rollers and the conveying drive device is to play a role in conveying and flattening the semi-circular bamboo during the flattening process. The radial pressure device includes an arc-shaped pressure ring and multiple small rotating pressure rollers disposed on the pressure ring; The outer convex surface of the bamboo, i.e. the green surface, is attached to the lower surface of the workbench. Multiple radial pressure devices are installed below the workbench from front to back. The gap between the small pressure roller and the opposite lower surface of the workbench is no greater than the thickness of the bamboo. Alternatively, the outer convex surface of the bamboo, i.e. the green surface, is attached to the upper surface of the workbench. Multiple radial pressure devices are installed above the workbench from front to back. The gap between the small pressure roller and the opposite upper surface of the workbench is no greater than the thickness of the bamboo. The arc shape of the pressure ring in the radial pressure device changes from small to large with the arc surface of the workbench; the purpose of setting up the radial pressure device is to make the semi-circular bamboo material fit tightly against the workbench and to flatten the arc surface of the bamboo material. 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, thus achieving circumferential pressing of the semi-circular bamboo together with the workbench.

2. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, characterized in that: When the convex surface of the bamboo, i.e. the green surface, is in contact with the lower surface of the worktable, the outer circumference of the upper roller along its rolling axis is a concave arc surface, and the outer circumference of the lower roller along its rolling axis is a convex arc surface. The concave arc surface of the upper roller is flush with the arc surface of the lower 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.

3. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, characterized in that: When the convex surface of the bamboo, i.e. the green surface, is in contact with the upper surface of the worktable, the outer circumference of the lower roller along its rolling axis is a concave arc surface, and the outer circumference of the upper roller along its rolling axis is a convex arc surface. The concave arc surface of the lower roller is flush with the arc surface of 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 lower roller and the generatrix length of the convex arc surface of the upper roller gradually increase.

4. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, 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 makes each pressure rod and pressure roller axis approach the worktable surface, and each small pressure roller presses the bamboo material tightly on the worktable surface.

5. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, characterized in that: The tangential pressing device includes a hydraulic cylinder and a side pressure roller hinged to the frame. A rotating side pressure roller is provided at the end of the piston rod extending out of the hydraulic cylinder. The side pressure roller is coaxial with the piston rod, and the end face of the side pressure roller contacts the thickness surfaces on both sides of the bamboo.

6. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, 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.

7. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, characterized in that: The pressing device includes two pressing cylinders arranged radially on both sides of the bamboo surface. The piston rod end of the pressing cylinder is equipped 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.

8. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 7, characterized in that: The number of clamping devices corresponds to the number of cutter discs, and the two clamping rollers of each clamping device are located on the same cross-section of the bamboo as the disc sleeve in a cutter disc.

9. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, characterized in that: The lifting device is a lifting hydraulic cylinder or an electric cylinder, and the piston rod of the lifting hydraulic cylinder or the push rod of the electric cylinder is connected to the outer sleeve of the disc.

10. The continuous unfolding equipment for removing inner nodes from semi-circular bamboo as described in claim 1, characterized in that: It also includes a guide device mounted on the frame, located between the semi-circular bamboo conveying device for removing inner nodes and the semi-circular bamboo flattening device. The guide device includes a lifting cylinder or an electric cylinder, with a rolling lifting roller at the end of the piston rod of the lifting cylinder or the end of the push rod of the electric cylinder. The rolling axis of the lifting roller is perpendicular to the axis of the bamboo. The guide device is used to lift the bamboo coming out from the rear end of the semi-circular bamboo conveying device for removing inner nodes upwards, so that the green surface of the bamboo entering the front end of the semi-circular bamboo flattening device contacts the lower surface of the worktable.

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