Semicircular bamboo conveying and inner joint removing device

Abstract

The utility model provides a semicircular bamboo conveying and inner joint removing device, which can be used for removing inner joints and tabasheer of a whole semicircular long bamboo without removing bamboo flesh, so that the utilization rate of the bamboo is improved, and comprises a power roller device, a cutter removing disc and a pressing device, the power roller device moves from front to back along the axis; each cutter head arranged from front to back comprises a disc outer sleeve, a rotating disc, a rotating cutter and a lifter. The turntable is rotationally arranged at the front end of the disc jacket and is driven by the turntable driving device to rotate relative to the disc jacket, the inner end of the rotating cutter is hinged to the turntable, and the outer end of the rotating cutter is a cutting edge extending front and back and extends out of the periphery of the disc jacket; from front to back, the diameter of the disc outer sleeve in each cutter head is gradually increased; a lifter arranged on the rack is connected with the disc outer sleeve so as to drive the disc outer sleeve to abut against the tabasheer face of the semicircular bamboo wood. And the pressing device is used for pressing the bamboo wood in the radial direction of the bamboo green surface of the bamboo wood, so that the thickness surfaces on the two sides of the bamboo wood are pressed on the roller.

Description

Technical Field

[0001] This utility model relates to the field of bamboo material removal and flattening technology, specifically a semi-circular bamboo material conveying and removal device. Background Technology

[0002] There are already domestic research patents for equipment used to horizontally flatten bamboo and remove inner nodes. Because the length of the round bamboo being horizontally flattened is short, the selected bamboo sections are usually the root segments with the largest diameter, resulting in a small taper along the length and almost uniform diameter at both ends, making it easy to remove inner nodes mechanically. Conventional longitudinal bamboo flattening typically involves separate, manual removal of inner nodes, which is labor-intensive, inefficient, and leaves residual inner nodes, leading to poor results. Longitudinal flattening also uses rolling and scoring on the bamboo's outer surface, resulting in a high bamboo loss rate and low bamboo utilization. Utility Model Content

[0003] This utility model provides a semi-circular bamboo conveying and inner node removal device, which can remove the inner nodes and bamboo yellow from a whole semi-circular bamboo without removing the bamboo flesh, thus improving the utilization rate of bamboo. It is not limited by the length of bamboo, has high operating efficiency, and removes the inner nodes cleanly without residue.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0005] 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;

[0006] 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.

[0007] Multiple inner section removal cutter discs are arranged from front to back. Each cutter 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 cutting edge that extends back and forth. In the radial direction of the turntable, the cutting edge extends about 0.2-0.5mm beyond the outer circumference of the disc outer sleeve. From the feeding end to the discharging end, the diameter of the disc outer sleeve in each cutter 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 abut against the bamboo core surface of the semi-circular bamboo material.

[0008] The pressing device is used to press the bamboo in the radial direction on the green side of the bamboo, so that the thick sides of the bamboo are pressed against the roller, making it easier for the yellow side of the bamboo to fit against the top of the disc outer sleeve.

[0009] As an improvement, a tapered cutter extending forward is installed on the turntable in the cutter head at the foremost position, and a drill bit extending forward is coaxially installed on the tapered cutter at the foremost position. No drill bits are installed in the cutter heads at other positions.

[0010] As an improvement, the clamping device includes at least two clamping cylinders arranged radially on the bamboo surface. The piston rod end of the clamping cylinder is provided with a rolling clamping roller. The outer circumference of the clamping roller contacts the bamboo surface, and the rolling axis of the clamping roller is perpendicular to the bamboo axis.

[0011] As an improvement, the number of clamping devices is the same as the number of cutter discs, and the clamping roller of each clamping device is located on the same cross-section of the bamboo as the disc sleeve in a cutter disc.

[0012] As an improvement, the lifting device is a lifting cylinder or an electric cylinder, etc., and the piston rod of the lifting cylinder or the push rod of the electric cylinder is connected to the outer sleeve of the disc.

[0013] As an improvement, the outer circumference of the disc outer sleeve is a conical surface that is larger in the front and smaller in the back, so as to match the taper of the bamboo and keep the outer circumference of the disc outer sleeve in close contact with the bamboo surface.

[0014] This utility model provides a continuous equipment for removing inner nodes and unfolding semi-circular bamboo. It can continuously remove inner nodes and flatten semi-circular whole long bamboo, without being limited by the length of the bamboo. It has high work efficiency, removes inner nodes cleanly without residue, and flattens the bamboo strips without cracks or scratches, thus improving the utilization rate of bamboo.

[0015] The continuous equipment for removing inner nodes from semi-circular bamboo includes the aforementioned semi-circular bamboo conveying and removing inner nodes device and semi-circular bamboo flattening device.

[0016] 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.

[0017] The workbench is gradient-shaped, with its front end (feed end) being semi-circular and gradually flattening out towards the rear end (discharge end) until the discharge end is completely flat. The conveying system used to drive the softened bamboo with its inner nodes removed from the feed end to the discharge end includes multiple pairs of rollers located on the upper and lower surfaces of the gradient-shaped workbench 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 workbench from front to back, and a pair of rollers is set at the upper and lower positions of each opening. The outer convex surface of the bamboo, i.e., the green surface, is in contact with the lower surface of the workbench, and the bamboo passes between the lower roller and the upper roller in each pair of rollers and is pressed by the lower roller and the upper roller.

[0018] Multiple radial pressing devices are installed under the workbench from front to back. Each radial pressing device includes an arc-shaped pressure ring and multiple rotating small pressure rollers mounted on the pressure ring. The gap between the small pressure rollers and the opposite lower surface of the workbench is no greater than the thickness of the bamboo. The arc shape of the pressure ring in the radial pressing device changes from small to large with the arc of the workbench.

[0019] 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.

[0020] As an improvement, a guiding device is also included between the semi-circular bamboo conveying device for removing inner nodes and the semi-circular bamboo flattening device. The guiding device includes a lifting cylinder or an electric cylinder, and a rolling lifting roller is located on the piston rod of the lifting cylinder or the push rod of the electric cylinder. The rolling axis of the lifting roller is perpendicular to the axis of the bamboo. The guiding device is used to lift the bamboo coming out from the rear end of the semi-circular bamboo conveying device for removing inner nodes upward, 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.

[0021] As an improvement, in the conveying device, the outer circumference of the upper roller is a concave arc surface along its rolling axis, and the outer circumference of the lower roller is a convex arc surface along its rolling axis. The concave arc surface of the upper roller is flush with the arc surface on the upper surface of the 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, and the arc gradually becomes flatter.

[0022] As an improvement, the upper roller in the conveying device is provided with a groove on its concave arc surface, and the groove extends in the same direction as the rolling axis of the upper roller.

[0023] As an improvement, the lengths of each opening and each pair of rollers increase progressively along the rolling axis of the rollers from front to back on the worktable surface. The lower roller is the drive roller connected to the conveying drive device and is made of heat-resistant rubber or plastic.

[0024] As an improvement, an elastic element is installed between the pressure ring and the frame. Under normal conditions, the elastic element causes the pressure ring to move closer to the worktable, and the small pressure rollers press the bamboo tightly onto the worktable.

[0025] As an improvement, the same pressure ring is made up of multiple pressure roller shafts connected together, and each pressure roller shaft is equipped with a rotating small pressure roller; the two ends of each small pressure roller shaft are respectively hinged to a pressure rod, and 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 shaft approach the worktable surface, and each small pressure roller presses the bamboo material tightly on the worktable surface, thereby realizing the unfolding of the curved surface of the bamboo material.

[0026] As an improvement, the arc surfaces of each pressure ring and the lower surface of the worktable opposite to that pressure ring are concentric circles.

[0027] As an improvement, the tangential pressing device includes a hydraulic cylinder and a side pressure roller hinged to the frame. The side pressure roller is rotatably mounted on the piston rod end extending from 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. The radius of the side pressure roller is not less than the thickness of the bamboo. The outer circumference of the side pressure roller contacts the lower surface of the worktable, and the portion of the end face of the side pressure roller near the lower surface of the worktable contacts the thickness surfaces on both sides of the bamboo.

[0028] As an improvement, 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.

[0029] As an improvement, the tangential pressing device also includes an oil pressure detection device for detecting the hydraulic oil pressure in the hydraulic cylinder and the second hydraulic cylinder. When the side pressure roller and the second side pressure roller come into contact with the thickness surfaces on both sides of the bamboo and apply pressure, the hydraulic oil pressure remains unchanged.

[0030] As an improvement, a photoelectric detection device is also included, located in front of each tangential pressing device, for detecting the chord height of the semi-circular bamboo material about to enter the worktable of the tangential pressing device. The photoelectric detection device is electrically connected to the controller, which is electrically connected to the hydraulic valve that controls the operation of the hydraulic cylinder and the second hydraulic cylinder. A hydraulic valve is installed on the hydraulic pipeline connected to the hydraulic cylinder and the second hydraulic cylinder. The controller controls the extension and retraction of the piston rod of the hydraulic cylinder and the second piston rod of the second hydraulic cylinder according to the chord height of the semi-circular bamboo material: when the bamboo material has not reached the worktable of the side pressure roller and the second side pressure roller, the piston rod and the second piston rod are in a retracted state and will not hinder the movement of the bamboo material; when the bamboo material reaches the worktable of the side pressure roller and the second side pressure roller, the piston rod and the second piston rod extend, and apply pressure to the thickness surface of the bamboo material through the side pressure roller and the second side pressure roller.

[0031] The beneficial effects of this utility model are as follows:

[0032] The semi-circular bamboo conveying and inner section removal device consists of a powered roller device, multiple inner section removal (bamboo diaphragm) cutter discs of different diameters added between the rollers, and a pressing device.

[0033] The clamping device and the disc sleeve in the cutter head clamp the bamboo to prevent the semi-circular bamboo from vibrating during the cutting process.

[0034] The blade of the rotary cutter extends approximately 0.2-0.5 mm beyond the outer circumference of the disc, removing the inner nodes while also shaving off a layer of bamboo shavings from the inner yellow surface of the round bamboo. When the smaller end of the semi-circular bamboo passes through the first cutter disc, the bamboo nodes and bamboo shavings at the smaller end are cleanly removed. As the bamboo moves forward, its diameter continuously increases. When the bamboo passes the first cutter disc, only the arched hole from the center of the bamboo septum to the bamboo shavings surface, matching the diameter of the first cutter disc's outer circumference, can be removed; the bamboo shavings and nodes cannot be completely removed. As the bamboo moves forward and reaches the next cutter disc, the larger diameter disc at that position rises under the action of the lifting device and presses against the bamboo shavings surface, compressing the semi-circular bamboo together with the clamping device. The rotary cutter in the disc removes any remaining bamboo nodes from the inner wall of the bamboo and removes a layer of bamboo shavings. This process is repeated until all the bamboo shavings and nodes are completely removed from the bamboo.

[0035] Due to the limitations of the disc outer sleeve, the rotating blade only extends a very small length (0.2-0.5mm) beyond the disc outer sleeve, making it impossible to cut into more of the bamboo flesh. This makes it easier for the rotating blade in the blade disc to precisely remove the inner nodes of the bamboo.

[0036] A conical cutter and drill bit are placed on the turntable in the foremost cutter head to prevent the inner section from contacting the front end of the turntable before the cutter cuts the inner section.

[0037] Each clamping device includes at least two clamping cylinders and clamping rollers on both sides of the bamboo green surface. The clamping rollers in each clamping device are symmetrically distributed above the bamboo, with the concave surface (bamboo yellow surface) of the semi-circular bamboo facing down. When the bamboo moves under the inner node removal device, the two clamping rollers first clamp the bamboo, and then the cutter disc, under the action of the lifting device, presses the bamboo against the bamboo yellow surface. The three of them fix the semi-circular bamboo in place.

[0038] Preferably, the semi-circular bamboo conveying device for removing inner nodes has a pressure controller, which includes a hydraulic valve and a pressure detection device. A hydraulic valve and a pressure detection device for detecting hydraulic oil pressure are installed on the oil supply lines to the clamping cylinder and the lifting cylinder. The pressure detection device, hydraulic valve, etc., are connected to the controller to ensure that the pressure of the clamping cylinder and the lifting cylinder remains constant when the clamping roller and the outer sleeve of the disc are in contact with the bamboo.

[0039] Because semi-circular bamboo has different ends with varying degrees of sharpness, the diameter of the bamboo is continuously changing. Therefore, a lifting device, such as a lifting cylinder, is installed below each cutter head. By setting the pressure of the lifting cylinder, the outer sleeve of the disc can be pressed against the yellow surface of the semi-circular bamboo. Above the cutter head, there are two clamping cylinders on the left and right. The piston rod of the clamping cylinder has a clamping roller at its end. The two clamping 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 clamping roller is the thickness of the bamboo wall. By setting the pressure of the clamping cylinder, the semi-circular bamboo will be fixed by the two clamping rollers and the outer sleeve of the disc, which can prevent the semi-circular bamboo from vibrating during the cutting process.

[0040] The outer surface of the disc jacket is set as a cone, and the taper of the cone is the same as that of the bamboo yellow surface, so that the disc jacket and the bamboo yellow surface fit together better.

[0041] The pressure controller can automatically extend and retract the piston rod of the pressing cylinder according to the change of the bamboo diameter, so that the pressing roller is tightly attached to the bamboo green surface. The lifting cylinder piston rod can automatically extend and retract according to the direct change of the bamboo, so that the disc outer sleeve is tightly attached to the bamboo yellow surface.

[0042] Preferably, the semi-circular bamboo conveying and inner node removal device has a sensing device for detecting inner nodes. The sensing device is located at the rear of the first cutter disc and is used to detect whether there are any remaining inner nodes after the bamboo has passed through the first cutter disc. When the smaller end of the semi-circular bamboo passes through the foremost first cutter disc, the bamboo node and bamboo pith at the smaller end will be cleanly removed. As the bamboo moves forward, the diameter of the bamboo continuously increases. The bamboo passing through the first cutter disc can only have a circular arched hole, consistent with the diameter of the outer casing of the first cutter disc, extending from the center of the bamboo diaphragm to the surface of the bamboo pith, removed. The bamboo pith and bamboo node cannot be completely removed. As the bamboo moves forward and reaches the next cutter head position, a sensor located below the bamboo to detect bamboo nodes detects the presence of no bamboo pith or inner nodes on the inner wall of the bamboo, allowing it to continue. When a bamboo node is detected, the larger diameter cutter head at that position rises under the action of a lifting cylinder, pressing against the bamboo pith surface. Together with two pressing cylinders above, it compresses the semi-circular bamboo. The rotating blades in the cutter head remove any remaining bamboo nodes from the inner wall of the bamboo, as well as a layer of bamboo pith. This process is repeated until all bamboo pith and bamboo nodes are completely removed from the bamboo.

[0043] The guiding device is located between the rear of the power roller device and the front of the worktable. It consists of a lifting cylinder and a lifting roller. Since the bamboo is fed with the smaller end first and has a smaller diameter, the feeding end of the worktable is a semi-circular arc with a larger diameter and a higher arc apex. When the smaller end of the bamboo enters below the worktable, it is difficult for it to automatically fit against the concave surface of the worktable. At this time, the piston rod of the lifting cylinder rises and lifts the bamboo, so that the green surface of the bamboo contacts and fits against the concave surface of the worktable.

[0044] The softened, semi-circular bamboo, with its inner nodes removed, is fed into the worktable from the feed end and clamped by a pair of rollers near the feed end, namely the lower roller and the upper roller. Then, under the action of the upper and lower roller conveying system, the bamboo moves from front to back along the worktable. During the movement, under the action of the radial pressure roller, the outer arc surface (bamboo green surface) of the bamboo is always in contact with the lower surface of the worktable, and the bamboo is gradually flattened. At the same time, the tangential pressure device applies pressure to the bamboo along the tangential (circumferential) direction of the bamboo arc surface. Because the bamboo's yellow surface is stretched during the pressing and flattening process of the small pressure rollers and rollers, tangential pressure is used to apply pressure to the circumference of the bamboo's arc. This is done by applying pressure along the tangential direction of the bamboo's arc, compressing the bamboo circumferentially. Since the arc length of the bamboo's green surface is greater than that of the yellow surface, the pressure point of the tangential pressure device is mainly on one side of the bamboo's green surface. The green surface will be subjected to greater compression, while the yellow surface will be subjected to less compression, preventing the yellow surface of the curved bamboo from cracking due to excessive stretching during the flattening process.

[0045] The worktable has a non-planar structure. One end (the inlet end) is semi-circular, gradually flattening out towards the other end (the outlet end) until it becomes completely flat. Multiple openings are set in the worktable, with a pair of conveying and pressing rollers positioned above and below each opening. The upper roller has a concave arc surface in the middle, with grooves on this surface. The grooves run in the same direction as the roller's length (the direction of the rolling axis) to increase friction during bamboo transport. The concave arc surface of the upper roller is flush with the upper surface arc of the worktable. The lower roller is made of heat-resistant rubber or plastic (because softening the semi-circular bamboo involves high temperatures). The roller at the inlet end is shorter, gradually increasing in length from the inlet end to the outlet end as the bamboo curves flatten (the lengths of the openings on the worktable also increase), to enhance friction on the bamboo and increase pressure on its flattened surface.

[0046] The gap between the small pressure rollers on the pressure ring and the lower surface of the worktable is no greater than the thickness of the bamboo. This allows the curved bamboo to pass through the gap while applying pressure to ensure it adheres to the curved surface of the worktable, thus gradually unfolding the bamboo's curved shape. The curvature of the pressure rings at different positions below the worktable varies, just like the curvature of the worktable itself. However, the curved surfaces of each pressure ring and its corresponding lower surface on the worktable are concentric circles. The small pressure rollers, together with the worktable, restrict the curvature of the bamboo. As the bamboo passes through the gap from the curved end (feeding end) of the worktable to the tail end, it changes according to the curvature between the curved surface of the worktable and the small pressure rollers on the pressure ring, eventually being flattened into a planar shape. The pressure rings can apply pressure to different types of bamboo, pressing them against the curved worktable surface as soon as they enter, keeping the bamboo in an unfolded state. Because of the thickness difference in bamboo walls, the smaller end of the bamboo near the tip has a thinner wall, while the larger end of the bamboo near the root has a thicker wall. If the gap distance remains constant, the radial pressure on the bamboo will change with the change in bamboo thickness. It is possible that the thinner-walled bamboo will not be subjected to radial pressure. Therefore, elastic elements such as springs are installed on the radial pressure device to adjust the gap size, so that radial pressure can be applied to the thin-walled bamboo, allowing the thin-walled bamboo to fit well on the changing work surface.

[0047] Bamboo also exhibits taper; the diameter and chord height of a semi-circular bamboo stalk vary with its length. The arc near the base of the bamboo is longer with a larger chord height, while the arc near the tip is shorter with a smaller chord height. To apply effective tangential force to the side (thickness surface) of the bamboo, the hydraulic cylinder of the tangential pressurizing device is equipped with a hydraulic pressure detection and control device (such as a pressure gauge and control valve). When the diameter of the bamboo arc is larger, the piston rod extends for a shorter length, and vice versa. The hydraulic pressure detection and control device senses changes in pressure based on the chord height of the bamboo arc contacted by the side pressure roller and extends or retracts accordingly, achieving continuous and effective tangential pressure on the bamboo wall.

[0048] Since the diameters of different bamboo materials vary, when one bamboo material passes through a tangential pressing device, the next bamboo material will soon pass through that device's location. Due to the different diameters of the bamboo materials, the chord height of the semicircular bamboo material varies. To ensure that the next bamboo material can move smoothly to the worktable position where the tangential pressing device is located, the tangential pressing device needs to be able to lift (retract) in advance. Furthermore, after the next bamboo material moves to the worktable position, the tangential pressing device needs to quickly apply pressure to the side (thickness) of the bamboo material. Therefore, a photoelectric detection device is installed in front of the front end of the worktable to detect the chord height of the semicircular bamboo material about to enter the front end of the worktable. The controller controls the extension and retraction of the piston rod of the hydraulic cylinder based on the chord height of the semicircular bamboo material. Photoelectric detection devices are also installed in front of other tangential pressing device positions for the same purpose. The descent and pressing times are set for each tangential pressing device, so that the tangential pressing devices at different positions can retract sequentially and then quickly press upwards.

[0049] Tangential pressing devices are not always arranged vertically upwards. The pressing direction of the tangential pressing device at different positions changes with the curvature of the worktable. From the feeding end, it is placed vertically and presses the bamboo vertically, to the discharge end, it gradually becomes flat with the curvature of the bamboo strip, and the pressing device is also placed approximately horizontally, applying approximately horizontal pressure to the bamboo.

[0050] The conveying device consists of multiple pairs of rollers arranged in upper and lower sections. The upper rollers are concave in the length direction, with the largest curvature on the concave surface of the upper rollers closest to the feed end of the worktable. The curvature of the concave surface of the upper rollers gradually flattens from the feed end to the discharge end. The lower rollers are made of high-temperature resistant elastic rubber or plastic rollers. The gap between the lower rollers and the upper rollers is equal to the thickness of the bamboo material. The length of the rollers continuously increases from the feed end to the discharge end.

[0051] Bamboo softening is a standard technique, and the softening temperature and time are well-known. After softening, the inner nodes of the bamboo are removed so that the bamboo can be smoothly conveyed and moved along the workbench.

[0052] This invention enables continuous, crack-free removal of inner nodes and unfolding of semi-circular whole bamboo stalks, improving bamboo utilization. The continuous process allows for mechanized operation, resulting in high efficiency and reduced manual labor. The inner nodes are removed cleanly without residue, while minimizing bamboo tissue loss and maximizing bamboo utilization. Attached Figure Description

[0053] Figure 1 This is a front view schematic diagram of a semi-circular bamboo flattening device.

[0054] Figure 2 This is a bottom view of the semi-circular bamboo flattening device.

[0055] Figure 3This is a schematic diagram of the worktable surface, tangential pressurization device, etc., at different cross-sections from front to back.

[0056] Figure 4 This is a schematic diagram of the worktable surface, radial pressure device, etc., at different cross-sections from front to back.

[0057] Figure 5 This is a side view of the semi-circular bamboo flattening device (feeding end).

[0058] Figure 6 This is a schematic diagram of a tangential pressure device applying pressure to the thick surface of bamboo.

[0059] Figure 7 This is a schematic diagram of the lower roller and upper roller at different positions from front to back.

[0060] Figure 8 Schematic diagram of a device for conveying the inner section of a semi-circular bamboo material.

[0061] Figure 9 This is a side view of the first cutter head, etc.

[0062] Figure 10 This is the main view of the first cutter head, etc.

[0063] Figure 11 A schematic diagram of a continuous unfolding equipment for removing the inner nodes of a semi-circular bamboo material.

[0064] In the diagram, the semi-circular bamboo flattening device is 100, the worktable is 1, the feeding end is 11, the discharging end is 12, and the opening is 13.

[0065] Radial pressure device 2, pressure ring 21, small pressure roller 22, pressure roller shaft 23, pressure rod 24, spring 25.

[0066] Tangential pressurizing device 3, hydraulic cylinder 31, piston rod 32, side pressure roller 33

[0067] Conveying system 4, lower roller 41, upper roller 42, upper roller concave arc surface 44,

[0068] Rack 16,

[0069] Bamboo material 1000, bamboo thickness surface 1001, inner node 1002, residual bamboo node 1003.

[0070] 500mm semi-circular bamboo conveyor for removing inner nodes

[0071] Powered roller assembly 5, roller 51, cutter head 6, disc outer sleeve 61, turntable 62, rotary cutter 63, lifting device 64, lifting cylinder 641, conical cutter 65, drill bit 66, clamping device 7, clamping cylinder 71, clamping roller 72, pulley 81, belt 82.

[0072] Guide device 9, lifting cylinder 91, lifting roller 92. Detailed Implementation

[0073] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0074] See Figure 11 The continuous unfolding equipment for removing inner nodes from semi-circular bamboo consists of three parts: a semi-circular bamboo conveying device for removing inner nodes 500, a guiding device 9, and a semi-circular bamboo flattening device 100.

[0075] See Figure 8-10 The semi-circular bamboo material conveying device 500 for removing inner nodes mainly includes a power roller device 5, a cutter disc 6, and a pressing device 7.

[0076] The power roller device 5 includes multiple rollers 51 that are spaced apart on the frame and supported on the bottom of both sides of the semi-circular bamboo material 1000 with the bamboo yellow side facing down, which are capable of active rotation, so as to drive the softened bamboo material 1000 to move along the axis from the front feeding end to the rear discharging end.

[0077] Multiple cutter discs 6 are arranged from front to back. Each cutter disc 6 includes a disc outer sleeve 61, a turntable 62, a rotating cutter 63, and a lifting device 64. The turntable 62 is rotatably mounted at the front end of the disc outer sleeve 61 and is driven by a turntable drive device to rotate relative to the disc outer sleeve 61. The inner end of the rotating cutter 63 is hinged to the turntable 62, and the outer end of the rotating cutter 63 is a blade extending forward and backward. In the radial direction of the turntable 62, the blade extends approximately 0.2-0.5 mm beyond the outer circumference of the disc outer sleeve 61. From front to back, the diameter of the disc outer sleeve 61 in each cutter disc gradually increases. The lifting device 64 is a lifting cylinder 641. The piston rod of the lifting cylinder is connected to the disc outer sleeve 61, and the cylinder body of the lifting cylinder is connected to the frame. The lifting cylinder 641 drives the disc outer sleeve 61 to press against the bamboo core surface of the semi-circular bamboo material 1000.

[0078] On the turntable 62 in the foremost cutter head, a tapered cutter 65 extending forward is provided, and a drill bit 66 extending forward is provided on the tapered cutter 65. The turntable 62, the tapered cutter 65, and the drill bit 66 are coaxial.

[0079] The turntable drive device can be a motor or similar device directly mounted on the outer casing 61 of the turntable. In this case, the turntable drive device and the outer casing 61 of the turntable rise and fall together under the drive of the lifting cylinder 641. Alternatively, the turntable drive device, such as a motor, can be mounted on the frame; see [reference needed]. Figure 8At this point, the motor is connected to the turntable 62 via a belt drive mechanism consisting of a pulley 81 fixed on the turntable, a pulley fixed on the motor output shaft, a belt 82, and a tension pulley. The lifting cylinder 641 only drives the disc outer sleeve 61 and the turntable 62 to move up and down; the motor does not move. Therefore, a tension pulley is needed to tension the belt and adapt to changes in the distance between the two pulleys. This is, of course, existing technology and will not be described in further detail.

[0080] The pressing device 7 is used to press the bamboo 1000 in the radial direction, so that the bamboo yellow surface of the bamboo is in contact with the top of the disc outer sleeve 61, and the bottom sides of the bamboo 1000 are pressed against the rollers. The pressing device 7 includes two pressing cylinders 71 arranged on both sides of the bamboo green surface in the radial direction of the bamboo. The cylinder body of the pressing cylinder 71 is mounted on the frame. The piston rod end of the pressing 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.

[0081] The number of clamping devices is the same as that of the cutter disc, and the two clamping rollers 72 of each clamping device are located on the same cross section of the bamboo as the disc sleeve 61 in one of the cutter discs.

[0082] The outer circumference of the outer casing 61 of the disc is a conical surface that is larger in the front and smaller in the back.

[0083] The pressure controller includes a hydraulic valve and a pressure detection device. A hydraulic valve and a pressure detection device for detecting the hydraulic oil pressure are installed on the oil supply lines to the pressing cylinder 71 and the lifting cylinder 641. The pressure detection device, hydraulic valve, etc. are connected to the controller to ensure that the pressure of the pressing cylinder 71 and the lifting cylinder 641 remains constant when the pressing roller 72 and the disc outer sleeve are in contact with the bamboo.

[0084] The sensing device for detecting inner nodes is located at the rear of the first cutter disc and is used to detect whether there are any remaining inner nodes 1003 in the bamboo after passing through the first cutter disc.

[0085] See Figure 11 The guiding device 9 is located between the semi-circular bamboo material conveying device 500 and the semi-circular bamboo material flattening device 100. The guiding device 9 includes a lifting cylinder 91 with its cylinder body mounted on the frame, and a rolling lifting roller 92 located on the piston rod of the lifting 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 device 500 upwards, so that the 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 worktable.

[0086] The semi-circular bamboo conveying and inner node removal device consists of a powered roller assembly, multiple inner node (bamboo diaphragm) cutter discs of different diameters inserted between the rollers, and a clamping device. In each clamping device, two clamping rollers are symmetrically distributed above the bamboo, with the concave surface (bamboo yellow side) of the semi-circular bamboo facing downwards. When the bamboo moves under the inner node removal device, the two clamping rollers first clamp the bamboo, and then the cutter discs, under the action of a lifting device, press the bamboo against the bamboo yellow side. These three elements secure the semi-circular bamboo. The cutter discs contain multiple rotating cutters for removing inner nodes (bamboo diaphragms).

[0087] The diameter of the outer casing of the discs in each cutter head increases from the feed end to the discharge end. Except for the cutter head at the very front closest to the feed end, which is equipped with conical cutters and drills, the other cutter heads are not equipped with conical cutters and drills.

[0088] The diameter of the cutter head (the outer diameter of the disc) is smallest near the feed end of the drum. The outer disc contacts the curved surface of the bamboo. The blades of the multiple cutters on the turntable, such as four rotating cutters, extend about 0.2-0.5mm beyond the outer disc.

[0089] Because the semi-circular bamboo has different ends with varying degrees of sharpness, the diameter of the bamboo is continuously changing. Therefore, a lifting device, such as a lifting cylinder, is installed below each cutter head. By setting the pressure of the lifting cylinder, the outer sleeve of the disc can be pressed against the inner surface of the semi-circular bamboo. Above the cutter head, there are two clamping cylinders on the left and right. The piston rod of the clamping cylinder has a clamping roller at its end. The two clamping 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 clamping roller is the thickness of the bamboo wall. By setting the pressure of the clamping cylinder, the semi-circular bamboo will be fixed by the two clamping rollers and the outer sleeve of the disc, which can prevent the semi-circular bamboo from vibrating during the cutting process. Due to the limitation of the outer sleeve of the disc, the rotary cutter only extends a small length beyond the outer sleeve of the disc, making it impossible to cut into more of the bamboo flesh. This makes it easier for the rotary cutter in the cutter head to accurately remove the inner section 1002 of the bamboo. The outer surface of the disc-shaped outer casing is designed as a cone, with the taper of the cone matching that of the bamboo yellow surface. This ensures a better fit between the disc-shaped outer casing and the bamboo yellow surface. The clamping cylinders are also equipped with pressure controllers, allowing the piston rods to automatically extend and retract according to changes in the bamboo diameter, ensuring the clamping rollers are tightly pressed against the bamboo surface. A lifting cylinder, also equipped with a pressure controller, is located below the disc-shaped outer casing. Under the control of the pressure controller, the piston rods of the lifting cylinders automatically extend and retract according to changes in the bamboo diameter, ensuring the disc-shaped outer casing is tightly pressed against the bamboo yellow surface. A drill bit at the front of the cutter head drills a hole in the bamboo septum. Subsequent conical cutters enlarge the hole, and the remaining bamboo septum (residual bamboo node 1003) attached to the bamboo yellow surface is removed by multiple rotating cutters. The cutting edges of these cutters extend approximately 0.2-0.5 mm beyond the outer circumference of the disc-shaped outer casing, removing the inner nodes while also shaving off a layer of bamboo yellow from the inner surface of the round bamboo. As the smaller end of the semi-circular bamboo passes through the first cutting disc, the bamboo nodes and bamboo pith are cleanly removed. As the larger end moves forward, the diameter of the bamboo increases. At the first cutting disc, only the arched hole from the center of the bamboo septum to the bamboo pith surface, matching the diameter of the first cutting disc's outer casing, can be removed; the bamboo pith and nodes cannot be completely removed. As the bamboo moves forward to the next cutting disc, a sensor located below detects the bamboo nodes. If no bamboo pith or inner nodes are detected on the inner wall, the bamboo continues to pass. If a bamboo node is detected, the larger diameter cutting disc at that position rises under the action of a lifting cylinder and presses against the bamboo pith surface. Together with the two pressing cylinders above, they press the semi-circular bamboo tightly. The rotating blades in the cutting disc remove the remaining bamboo nodes 1003 from the inner wall of the bamboo and remove a layer of bamboo pith. This process is repeated until all bamboo pith and nodes are completely removed from the bamboo.

[0090] The guiding device is located between the rear of the power roller device and the front of the worktable. It consists of a lifting cylinder and a lifting roller. Since the bamboo is fed with the smaller end first and has a smaller diameter, the feeding end of the worktable is a semi-circular arc with a larger diameter and a higher arc apex. When the smaller end of the bamboo enters below the worktable, it is difficult for it to automatically fit against the concave surface of the worktable. At this time, the piston rod of the lifting cylinder rises and lifts the bamboo, so that the green surface of the bamboo contacts and fits against the concave surface of the worktable.

[0091] See Figure 11 , 1 -5. The semi-circular bamboo flattening device 100 unfolds a whole long semi-circular bamboo 1000 to improve the utilization area and utilization rate of bamboo. It includes a frame 16, on which a progressive worktable 1, a radial pressurizing device 2, a tangential pressurizing device 3, a conveying system 4, and photoelectric limit switches are installed.

[0092] The front end of the progressive worktable 1, i.e. the feeding end 11, is semi-circular, and as it extends towards the rear end, i.e. the discharging end 12, the arc gradually flattens out until the discharging end is completely flat. Multiple openings 13 are provided in the middle of the worktable from front to back.

[0093] The conveying system 4 for driving the bamboo material to move from front to back includes multiple 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 are arranged vertically at each opening position. The upper roller has a concave arc surface 44 at the middle of its outer periphery along its rolling axis (length direction), and the concave arc surface of the upper roller is flush with the arc surface of the upper surface of the worktable. The concave arc surface 44 of the upper roller is provided with grooves, and the grooves extend in the same direction as the rolling axis of the upper roller. The lower roller 41 is preferably in a state of floating up and down and pressing the bamboo material 1000 under the support of an elastic element (such as a spring), so that the gap between the upper roller 42 and the lower roller 41 can better adapt to the thickness variation of the bamboo material.

[0094] Along the worktable surface from front to back, the lengths of each opening 13 and each pair of rollers (lower roller 41 and upper roller 42) increase in the direction of the roller rolling axis. The lower roller 41 is the drive roller connected to the conveying drive device and is made of heat-resistant elastic rubber or heat-resistant plastic.

[0095] The convex (bamboo green) surface of the softened bamboo 1000, after removing the inner nodes, is in contact with the lower surface (concave) of the worktable 1. 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 convex (bamboo green) surface of the bamboo 1000 contacts the concave arc surface 44 of the upper roller 42, and the concave (bamboo yellow) surface of the bamboo 1000 contacts the convex arc surface of the lower roller 41. In each pair of rollers, the generatrix length of the concave arc surface 44 of the upper roller 42 and the generatrix length of the convex arc surface of the lower roller 41 also varies. The generatrix length is shortest near the feeding end. As the bamboo moves from the feeding end to the discharging end, the generatrix length of the concave arc surface 44 of the upper roller 42 and the generatrix length of the convex arc surface of the lower roller 41 become longer, and the generatrix length is longest near the discharging end.

[0096] Multiple radial pressing devices 2 are arranged below the worktable from front to back. Each radial pressing device includes an arc-shaped pressure ring 21, small pressure rollers 22, pressure roller shafts 23, pressing rods 24, and springs 25. The pressure ring 21 is formed by multiple pressure roller shafts 23 connected sequentially, with a rotating small pressure roller 22 mounted on each pressure roller shaft 23; both ends of each pressure roller shaft are hinged to a pressing rod 24. Each pressing rod 24 is slidably connected to the frame 16, and a spring 25 is placed between each pressing rod and the frame. Under normal conditions, the spring 25 causes each pressing rod 24 and pressure roller shaft 23 to move closer to the upper surface of the worktable, and each small pressure roller 22 presses the bamboo material firmly against the upper surface of the worktable. Each pressure ring is essentially arc-shaped, and the arc surface on the lower surface of the worktable opposite to the pressure ring is essentially a concentric circle.

[0097] Multiple tangential pressing devices 3 are symmetrically arranged on both sides of the workbench from front to back. These symmetrical tangential pressing devices act on the thickness surfaces at both ends of the bamboo cross-section arc, applying pressure to the bamboo along the tangential direction of the bamboo arc. The tangential pressing device 3 includes a hydraulic cylinder 31 with its lower end hinged to a frame located on both sides of the workbench, hydraulic pipelines with hydraulic valves, an oil pressure detection and control device for detecting and controlling the hydraulic oil pressure inside the hydraulic cylinder, and a side pressure roller 33. A rotatable side pressure roller 33 is rotatably mounted at the end of the piston rod 32 extending from the hydraulic cylinder 31. The side pressure roller 33 is coaxial with the piston rod 32, and its radius is not less than the thickness of the bamboo 1000. The outer circumferential surface of the side pressure roller contacts the lower surface of the edge of the workbench, and the portion of the side pressure roller end face near the lower surface of the workbench contacts the bamboo thickness surface 1001 on the bottom side of the bamboo 1000.

[0098] Of course, other tangential pressing devices can also be used. For example, another tangential pressing device includes a second hydraulic cylinder hinged at its lower end to a frame located on both sides of the worktable, hydraulic lines with hydraulic valves, an oil pressure detection and control device for detecting and controlling the hydraulic oil pressure inside the second hydraulic cylinder, and a second side pressure roller. A second bracket is fixed to the end of the piston rod extending from the second hydraulic cylinder, and the shaft of the second side pressure roller is fixed to the second bracket. The second side pressure roller is rotatably mounted on its shaft. The outer periphery of the second side pressure roller contacts the thickness surfaces 1001 on both sides of the bamboo material, and the rotation axis of the second side pressure roller is perpendicular to the axis of the bamboo material.

[0099] A photoelectric limit switch, serving as a photoelectric detection device, is installed at the front of the workbench to detect the chord height and arrival time of the semi-circular bamboo 1000 about to enter the front of the workbench. The photoelectric limit switch is electrically connected to a controller, which is electrically connected to the hydraulic valves controlling the operation of hydraulic cylinders 31 and 2. Based on the chord height and arrival time of the semi-circular bamboo, the controller controls the extension and retraction of piston rods 32 and 2 of hydraulic cylinders 31 and 2. When the bamboo 1000 has not reached the workbench surface where the side pressure rollers 33 and 2 are located, piston rods 32 and 2 are retracted, not hindering the movement of the bamboo. When the bamboo reaches the workbench surface where the side pressure rollers 33 and 2 are located, piston rods 32 and 2 extend, applying pressure to the thickness surface 1001 of the bamboo through the side pressure rollers 33 and 2. When the side pressure rollers 33 and 2 contact and apply pressure to the thickness surfaces on both sides of the bamboo, the hydraulic oil pressure remains constant.

[0100] This utility model provides a continuous equipment for removing inner nodes from semi-circular bamboo, which can continuously remove inner nodes and flatten semi-circular bamboo in one operation. It boasts high efficiency, removes inner nodes cleanly without residue, scratches, or cracks, and improves bamboo utilization. The equipment includes a semi-circular bamboo conveying and inner node removal device and a semi-circular bamboo flattening device. The semi-circular bamboo conveying and inner node removal device includes a power roller device, a cutter disc, and a pressing device. Each cutter disc includes a disc outer sleeve, a turntable, a rotary cutter, and a lifting device. The power roller device drives the softened bamboo along the axis from the front feed end to the rear discharge end. The turntable rotates relative to the front end of the disc outer sleeve. The inner end of the rotary cutter is hinged to the turntable, and the outer end of the rotary cutter has a blade extending forward and backward, protruding from the outer circumference of the disc outer sleeve. The lifting device drives the disc outer sleeve to press against the yellow surface of the semi-circular bamboo. The pressing device ensures that the yellow surface of the bamboo is in contact with the top of the disc outer sleeve. The semi-circular bamboo flattening device comprises a gradient worktable, radial pressing devices, tangential pressing devices, and a conveying system. The gradient worktable has a semi-circular inlet end that gradually flattens towards the outlet end until it is completely flat. The conveying system includes multiple pairs of rollers and a conveyor drive. Multiple openings are provided on the worktable from front (inlet end) to back (outlet end), with a pair of rollers positioned above and below each opening. Multiple radial pressing devices are located below the worktable from front to back. The pressure rings in these devices gradually increase in size as the curvature of the worktable increases, thus flattening the curved surface of the bamboo. The flattening and radial pressing device includes an arc-shaped pressure ring and multiple rotating small pressure rollers set on the pressure ring. The gap between the small pressure rollers and the lower surface of the opposite worktable is no greater than the thickness of the bamboo. Multiple symmetrical tangential pressing devices are set on both sides of the gradient worktable from front to back. The tangential pressing devices apply pressure to the thickness surface on both sides of the bamboo along the tangential direction of the bamboo arc. Together with the worktable, they achieve circumferential pressing of the arc bamboo, preventing cracks in the bamboo yellow surface due to uneven stretching at various points of the arc during the flattening process.

[0101] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A semi-circular bamboo material conveying device for removing inner nodes, characterized in that: Includes a power roller device, an inner section cutter head, 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 inner section removal cutter discs are arranged from front to back. Each cutter 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 cutting edge that extends back and forth. In the radial direction of the turntable, the cutting edge extends about 0.2-0.5mm beyond the outer circumference of the disc outer sleeve. From front to back, the diameter of the disc outer sleeve in each cutter 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 abut against the bamboo core surface of the semi-circular bamboo material. The pressing device is used to press the bamboo in the radial direction on the green side of the bamboo, and to press the thick sides of the semi-circular bamboo onto the roller, so that the yellow side of the bamboo can fit into the top of the disc outer sleeve.

2. The semi-circular bamboo material conveying and inner node removal device as described in claim 1, characterized in that: On the turntable in the foremost cutter head, there is a tapered cutter that extends forward. A drill bit that extends forward is coaxially mounted on the foremost tapered cutter. There are no drill bits in the other cutter heads.

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

4. The semi-circular bamboo material conveying and inner node removal device as described in claim 3, characterized in that: The number of clamping devices corresponds to the number of cutter discs, and the clamping roller of each clamping device is located on the same cross-section of the bamboo as the disc sleeve in a cutter disc.

5. The semi-circular bamboo material conveying and inner node removal device 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.

6. The semi-circular bamboo conveying and inner node removal device as described in claim 1, characterized in that: The outer circumference of the disc's outer casing is a conical surface that is larger in the front and smaller in the back.

Images