Bamboo chip screening machine

Abstract

The utility model provides a bamboo chip screening machine. The bamboo chip screening machine comprises a machine frame and a bamboo chip screening mechanism installed in the machine frame. The bamboo chip screening mechanism comprises two vertical supporting frames oppositely arranged in the transverse direction of the rack, an annular vertical conveying device installed between the two vertical supporting frames and a plurality of bamboo chip supporting pieces arranged on the conveying surface of the vertical conveying device and distributed in the conveying direction. A transmission shaft of the vertical conveying device is transversely erected between the two vertical supporting frames; two bamboo chip blanking guide pieces are further vertically arranged in the rack and are arranged on the two transverse sides of the bamboo chip screening mechanism respectively. A cross beam is arranged in the machine frame, the two bamboo chip blanking guide pieces are jointly arranged on the cross beam in a penetrating mode, and at least one bamboo chip blanking guide piece can slide in the length direction of the cross beam. The width of the two guide pieces located on the left side and the right side can be adjusted according to the length of the bamboo chips, and the problem that the applicable length of the bamboo chips is narrow in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of bamboo product production equipment, in particular to a bamboo chip screening machine. Background Art

[0002] At present, the first process of bamboo product production is to sort the bamboo strips through a bamboo strip screening machine to achieve single-piece output for subsequent processing.

[0003] A Chinese patent with authorization announcement number CN217342373U discloses a bamboo chip screening device, which includes a machine body and a screening and feeding device, a clamping and feeding device, a flipping device, and a discharging device arranged on the machine body; the bamboo chips to be screened are transported to the screening and feeding device via a horizontal conveying device, and the bamboo chips are screened by the screening and feeding device and a single bamboo chip is fed to the clamping and feeding device, the screening and feeding device includes a screening vertical conveying device, and the screening vertical conveying device is evenly distributed with multiple pairs of screening support blocks distributed left and right along its conveying direction, the bamboo chips are laterally supported between the same pair of screening support blocks and driven by the screening vertical conveying device to be vertically transported upward, and two screening guide plates are arranged on both sides of the top of the screening vertical conveying device to facilitate the falling of the bamboo chips supported on the screening support blocks; the clamping and feeding device transports the bamboo chips to the discharging device; the flipping device flips the bamboo chips on the clamping and feeding device; and the discharging device outputs the bamboo chips.

[0004] The above-mentioned existing bamboo chip screening machine has the following defects: (1) The width between the two screening guide plates is not adjustable, the drop guide structure has a large restriction on the length of the bamboo chips, and its applicability is narrow; (2) The length of the screening guide plates is relatively short. After the bamboo chips leave the guide plates, they will continue to fall for a distance due to their own gravity and the acceleration when leaving the guide plates. Therefore, the drop position of the bamboo chips will be affected by many factors such as their own gravity and the conveying speed of the conveying device, resulting in poor consistency in the drop position of the bamboo chips; (3) Regardless of whether it is a sorting feeding device or a screening feeding device, the bamboo chips are supported between two support blocks. If the bamboo chips are hung on one side of the support block, the support block will be vertically upward, which will cause the bamboo chips to stand upright between the two support blocks, causing shutdown and adjustment. Utility Model Content

[0005] The utility model aims to provide a bamboo chip screening machine, on which the width distance between two bamboo chip blanking guide plates located on the left and right sides can be adjusted according to the length of the bamboo chips, thereby solving the problem that the blanking guide structure in the prior art is narrow in adaptability to the length of the bamboo chips.

[0006] A bamboo chip screening machine comprises a frame and a bamboo chip screening mechanism installed in the frame; the bamboo chip screening mechanism comprises two vertical support frames arranged opposite to each other in the transverse direction of the frame, an annular vertical conveying device installed between the two vertical support frames, and a plurality of bamboo chip supports arranged on the conveying surface of the vertical conveying device and distributed along the conveying direction; the transmission shaft of the vertical conveying device is transversely erected between the two vertical support frames; two bamboo chip dropping guide plates are also vertically arranged in the frame, and the two bamboo chip dropping guide plates are respectively arranged on the transverse sides of the bamboo chip screening mechanism; a crossbeam is arranged in the frame, and the two bamboo chip dropping guide plates are jointly penetrated on the crossbeam, and at least one of the bamboo chip dropping guide plates can slide along the length direction of the crossbeam.

[0007] The two bamboo blanking guide pieces of the utility model are jointly penetrated on a cross beam located in the frame, and at least one of the bamboo blanking guide pieces can slide along the length direction of the cross beam, so that the width distance between the two bamboo blanking guide pieces is adjustable. The width distance between the two bamboo blanking guide pieces is adjusted according to the length of the bamboo pieces. The blanking guide structure has a wider range of applicability to the length of the bamboo pieces, and can achieve the best guiding effect for bamboo pieces of different lengths.

[0008] Preferably, a cross beam is provided at the upper part and the lower part of the frame respectively, and each bamboo sheet falling guide piece is passed through the two cross beams.

[0009] Preferably, one of the bamboo chip blanking guide pieces is fixedly connected to the crossbeam, and the other bamboo chip blanking guide piece can slide along the length direction of the crossbeam. The width distance between the two bamboo chip blanking guide pieces can be adjusted by only adjusting the position of the other bamboo chip blanking guide piece, which makes adjustment more convenient.

[0010] Preferably, an auxiliary material-dropping guide piece is correspondingly arranged between each bamboo material-dropping guide piece and the bamboo material-screening mechanism. When the width distance between the bamboo material-dropping guide piece and the bamboo material-screening mechanism is relatively far, the auxiliary material-dropping guide piece can play a role in strengthening the guiding effect between the two. Furthermore, the two auxiliary material-dropping guide pieces are jointly arranged on the crossbeam, and one of the auxiliary material-dropping guide pieces located between one of the bamboo material-dropping guide pieces and the bamboo material-screening mechanism is fixedly connected to the crossbeam, and the other auxiliary material-dropping guide piece located between the other bamboo material-dropping guide piece and the bamboo material-screening mechanism can slide along the length direction of the crossbeam, which is consistent with the assembly connection method of the two bamboo material-dropping guide pieces, and is convenient for assembly.

[0011] Preferably, the bamboo chip screening mechanism is slidably arranged on the crossbeam, so that the bamboo chip screening mechanism can also slide laterally along the crossbeam.

[0012] Preferably, each of the bamboo support members is a long strip plate, and each of the bamboo support members is arranged across the conveying surface of the vertical conveying device. Compared with the existing bamboo support member structure with two support blocks on both sides, there will be no situation where the bamboo piece hangs on one side of the support block and the bamboo piece stands upright in the middle of the vertical conveying device, thereby avoiding the shutdown caused by this. In the specific implementation process, the vertical conveying device includes two annular vertical conveying chains symmetrically arranged in the transverse direction of the frame, and each of the bamboo support members is transversely erected between the two conveying chains.

[0013] Preferably, a rejection mechanism is provided on the bamboo chip running path on the feeding side of the vertical conveying device, and the rejection mechanism includes a push cylinder and a push plate transmission-connected to the push cylinder, and the push cylinder drives the push plate to push down the bamboo chips on the bamboo chip support. When there are ≥2 bamboo chips on the bamboo chip support, the bamboo chips on the bamboo chip support are pushed down by the rejection mechanism, and the pushed down bamboo chips fall back into the feeding chute, so that the bamboo chips held up by the bamboo chip support that do not meet the quantity requirements are rejected, so as to achieve single-piece output of bamboo chips. Furthermore, a bamboo chip quantity detection mechanism is provided on the feeding side of the bamboo chip screening mechanism, and the bamboo chip quantity detection mechanism is electrically connected to the rejection mechanism. The utility model can detect the number of bamboo chips held up by the two bamboo chip receiving blocks through the bamboo chip quantity detection mechanism, so as to control the action of the rejection mechanism.

[0014] Preferably, a bamboo chip receiving block is correspondingly arranged on the bamboo chip guide path of each bamboo chip blanking guide piece, and the two bamboo chip receiving blocks corresponding to the two bamboo chip blanking guide pieces are arranged to be aligned left and right. After the vertical conveying device conveys the bamboo chips to the top thereof, the bamboo chips will leave the bamboo chip support member under the action of gravity, and the bamboo chips leaving the bamboo chip support member will fall downward under the guidance of the bamboo chip blanking guide piece and be received by the two bamboo chip receiving blocks. Compared with the bamboo chip blanking guide piece and its corresponding bamboo chip receiving block being separated by a certain distance in the prior art, the utility model can realize accurate material receiving. Furthermore, a bamboo chip end clamping mechanism for clamping the ends of the bamboo chips on the two bamboo chip receiving blocks is arranged at either end of the two bamboo chip receiving blocks, and a flipping mechanism is arranged at one end of the bamboo chip end clamping mechanism away from the bamboo chip receiving block, and the flipping mechanism is transmission-connected with the bamboo chip end clamping mechanism and can drive the bamboo chip end clamping mechanism to flip. The bamboo piece end clamping mechanism clamps the ends of the bamboo pieces held up by the two bamboo piece receiving blocks, and the flipping mechanism drives the bamboo piece clamping mechanism to flip while driving the bamboo piece to flip one side. The front and back directions of each output bamboo piece can be kept consistent through the bamboo piece end clamping mechanism and the flipping mechanism. Furthermore, a bamboo piece front and back detection device is suspended directly above the two bamboo piece receiving blocks, and the bamboo piece front and back detection device is electrically connected to the bamboo piece end clamping mechanism and the flipping mechanism. The utility model can sense whether the bamboo pieces held up by the two bamboo piece receiving blocks are facing up with the front side or the back side, and thereby control the actions of the bamboo piece end clamping mechanism and the flipping mechanism. Furthermore, a discharging mechanism is provided on the side of the two bamboo chip receiving blocks away from the vertical conveying device, and the discharging mechanism includes a discharging translation cylinder provided along the lateral direction of the frame, and a connecting plate driven by the discharging translation cylinder is connected to the discharging translation cylinder, and a bamboo chip clamping cylinder capable of clamping the bamboo chips on the two bamboo chip receiving blocks is fixed on the connecting plate, and the ends of the two bamboo chip receiving blocks away from the bamboo chip end clamping mechanism are the discharging ends. The discharging clamping cylinder clamps the bamboo chips on the two bamboo chip receiving blocks, and the discharging translation cylinder drives the connecting plate together with the bamboo chip clamping cylinder and the bamboo chips to send the bamboo chips out from the discharging end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a front view of the bamboo chip screening machine of the present invention;

[0016] FIG2 is a three-dimensional structural diagram of the bamboo chip screening machine of the utility model at a first angle;

[0017] FIG3 is a rear view of the bamboo chip screening machine of the present invention;

[0018] FIG. 4 is a three-dimensional structural diagram of the bamboo chip screening machine of the present invention at a second angle. Implementation

[0019] The best specific implementation method of the bamboo chip screening machine of the utility model is described in detail below in conjunction with the accompanying drawings:

[0020] 1 and 3 , a bamboo chip screening machine includes a frame 10 and a bamboo chip screening mechanism 20 installed in the frame 10;

[0021] The bamboo chip screening mechanism 20 includes two vertical support frames 21 arranged opposite to each other in the transverse direction of the frame 10, an annular vertical conveying device 22 installed between the two vertical support frames 21, and a plurality of bamboo chip supports 23 arranged on the conveying surface of the vertical conveying device 22 and distributed along the conveying direction; the transmission shaft 221 of the vertical conveying device 22 is transversely arranged between the two vertical support frames 21; two bamboo chip drop guide pieces 30 are also vertically arranged in the frame 10, and the two bamboo chip drop guide pieces 30 are respectively arranged on the transverse sides of the bamboo chip screening mechanism 20; a cross beam 40 is respectively arranged at the upper part and the lower part of the frame 10, and the two bamboo chip drop guide pieces 30 are penetrated on the two cross beams 40; one of the bamboo chip drop guide pieces 30 is fixedly connected to both of the two cross beams 40, and the other bamboo chip drop guide piece 30 can slide along the length direction of the two cross beams 40.

[0022] The two bamboo strip blanking guide pieces 30 of the utility model are jointly penetrated on a cross beam 40 located in the frame 10, and at least one of the bamboo strip blanking guide pieces 30 can slide along the length direction of the cross beam 40, so that the width distance between the two bamboo strip blanking guide pieces 30 is adjustable. The width distance between the two bamboo strip blanking guide pieces 30 is adjusted according to the length of the bamboo strip, which has a wider applicable range for the length of the bamboo strip, and can achieve the best guiding effect for bamboo strips of different lengths.

[0023] Of course, the number of the beams 40 of the present invention can be but is not limited to two as shown in the drawings, and can also be one, or three or more; at the same time, one of the bamboo sheet blanking guide pieces 30 can be fixedly connected to the beam 40, or can slide laterally along the length direction of the beam 40.

[0024] Preferably, as shown in FIG. 3 , a slide rail 41 is provided on the crossbeam 40 along its length direction, and a connecting seat 50 is connected to the axial side of the other bamboo chip blanking guide piece 30 , and the bottom of the connecting seat 50 (through a slider 300 ) is slidably matched with the slide rail 41 .

[0025] Preferably, as shown in FIG. 3 and FIG. 4 , an auxiliary material dropping guide piece 180 is correspondingly arranged between each bamboo material dropping guide piece 30 and the bamboo material screening mechanism 20. As shown in FIG. 3 , one of the auxiliary material dropping guide pieces 180 located between one of the bamboo material dropping guide pieces 30 and the bamboo material screening mechanism 20 is fixedly connected to the cross beam 40, and another auxiliary material dropping guide piece 180 located between the other bamboo material dropping guide piece 30 and the bamboo material screening mechanism 20 can slide laterally along the length direction of the cross beam 40. In the specific implementation process, as shown in FIG. Figure 3 As shown, the shaft side of the other bamboo strip blanking guide piece 30 is connected to an auxiliary connection seat 190, and the bottom of the auxiliary connection seat 190 (through a slider 300) is slidably matched with the slide rail 41. Of course, the present invention may not be provided with two auxiliary blanking guide pieces 180; moreover, one of the auxiliary blanking guide pieces 180 may be fixedly connected to the crossbeam 40, or may be able to slide laterally along the length direction of the crossbeam 40.

[0026] Preferably, the bamboo chip screening mechanism 20 is slidably mounted on the cross beam 40, so that the bamboo chip screening mechanism 20 can also slide laterally along the cross beam 40. In the specific implementation process, a connecting rod 60 is connected between the two vertical support frames 21 of the bamboo chip screening mechanism 20, and the bottom of the connecting rod 60 (through two sliders 300) is slidably matched with the slide rail 41.

[0027] Preferably, as shown in Fig. 1 to Fig. 4, each of the bamboo chip support members 23 is a long strip plate, and each of the bamboo chip support members 23 is arranged across the conveying surface of the vertical conveying device 22. Compared with the existing bamboo chip support member structure with two support blocks on both sides, there will be no situation where the bamboo chip is hung on one side of the support block and the bamboo chip stands upright in the middle of the vertical conveying device 22, thereby avoiding the shutdown caused by this. In the specific implementation process, as shown in Fig. 1 and Fig. 3, the vertical conveying device 22 includes two annular vertical conveying chains 222 symmetrically arranged in the transverse direction of the frame 10, and each of the bamboo chip support members 23 is transversely erected between the two conveying chains 222. Of course, the bamboo chip support member 23 of the utility model can also adopt the existing structure of two support blocks on both sides; and the vertical conveying device 22 is not limited to the chain-type conveying structure in the attached drawings, and it can adopt the existing common annular vertical conveying device.

[0028] Preferably, as shown in FIG. 2 , a feed ramp 80 is provided on the feeding side of the vertical conveying device 22, and the conveying path of the feed ramp 80 is connected to the conveying path of the vertical conveying device 22, and a feed chute 90 is enclosed between the feed ramp 80 and the vertical conveying device 22. The bamboo chips to be screened are put into the feed chute 90, and at this time, the bamboo chips will be accumulated at the bottom of the feed chute 90 (i.e., the position where the feed ramp 80 is connected to the vertical conveying device 22); the accumulated bamboo chips will be lifted and vertically transported upward when the bamboo chip support 23 passes. The utility model adopts the feed ramp 80 and the vertical conveying device 22 to enclose the feed chute 90 to realize the natural feeding of bamboo chips, and only one set of vertical conveying devices is used, which greatly simplifies the equipment structure, reduces the floor space, and also reduces the investment and operation costs. A bamboo chip support member clearance groove 81 is provided at the bottom end of the feed ramp 80. In the specific implementation process, as shown in Figures 2 and 4, the feed inclined plate is mounted on the frame, and its bottom end is fixedly connected to the vertical support frame. Of course, the feeding structure on the feeding side of the vertical conveying device 22 of the utility model can also use an existing horizontal conveyor belt to convey the bamboo chips to the vicinity of the vertical conveying device 22 so that the bamboo chip support 23 can hold up the bamboo chips.

[0029] Preferably, in combination with FIG. 1 and FIG. 4 , a rejection mechanism 100 is provided on the bamboo chip running path on the feeding side of the vertical conveying device 22, and the rejection mechanism 100 includes a push cylinder 101 and a push plate 102 which is transmission-connected to the push cylinder 101, and the push cylinder 101 drives the push plate 102 to push down the bamboo chips on the bamboo chip support 23. When there are ≥2 bamboo chips on the bamboo chip support 23, the bamboo chips on the bamboo chip support 23 are pushed down by the rejection mechanism 100, and the pushed down bamboo chips fall back into the feeding chute 90, so as to reject the bamboo chips which do not meet the quantity requirement held up by the bamboo chip support 23, so as to output the bamboo chips in single pieces. Further, as shown in FIG1 , a bamboo chip quantity detection mechanism 200 is provided on the feeding side of the bamboo chip screening mechanism 20, and the bamboo chip quantity detection mechanism 200 is electrically connected to the rejection mechanism 100. The utility model can detect the number of bamboo chips held by the two bamboo chip receiving blocks 110 through the bamboo chip quantity detection mechanism 200, thereby controlling the action of the rejection mechanism 100.

[0030] Preferably, as shown in Figures 3 and 4, a bamboo chip storage mechanism is further provided on the blanking side of the vertical conveying device 22 in the frame 10, and the bamboo chip storage structure and the bamboo chip blanking guide piece 30 are separated on both sides of the bamboo chip blanking path and arranged opposite to each other, and the bamboo chip storage mechanism includes at least one group of top pressure cylinders; each group of top pressure cylinders is composed of two top pressure cylinders 150 corresponding to the two bamboo chip blanking guide pieces 30 one by one, and the two top pressure cylinders 150 in the same group are arranged horizontally aligned; the free end of the piston rod of each top pressure cylinder 150 is arranged toward one side of the bamboo chip blanking guide piece 30, and a bamboo chip clamping and storage station is formed between the free end of the piston rod of the two top pressure cylinders 150 in each group and the two bamboo chip blanking guide pieces 30. Since the utility model has at least one group of top-pressing cylinders, a bamboo piece clamping and storage station is formed between the front ends of the movable rods of the two top-pressing cylinders 150 of each group and the two bamboo piece blanking guide pieces 30, so that at least two bamboo piece clamping and storage stations are provided on the blanking side of the vertical conveying device 22. The bamboo pieces are pre-stored at each of the bamboo piece clamping and storage stations to avoid a certain vacant bamboo piece support 23 (for example, the bamboo piece on the bamboo piece support 23 is pushed down by the rejection mechanism 100) from being blanked. The bamboo piece storage mechanism 150 can still perform normal blanking without affecting the normal operation of the subsequent bamboo piece clamping mechanism 120 and the flip mechanism 130, thereby improving the overall work efficiency. Furthermore, when the number of top-pressing cylinders of the bamboo piece storage mechanism is ≥ two groups, each group of top-pressing cylinders is sequentially arranged along the bamboo piece blanking path. In the specific implementation process, as shown in FIG3 and FIG4, when the utility model is provided with the bamboo chip receiving block 110, the bamboo chip storage mechanism 150 is located above the bamboo chip receiving block 110. Of course, the utility model may not be provided with the bamboo chip storage mechanism 150; the number of the top pressure cylinders 150 of the bamboo chip storage mechanism is not limited to the three groups shown in the drawings, and it may also be one group, two groups, or four groups or more.

[0031] Preferably, in conjunction with FIG. 3 and FIG. 4 , a bamboo chip receiving block 110 is correspondingly arranged on the bamboo chip guide path of each bamboo chip drop guide piece 30, and the two bamboo chip receiving blocks 110 corresponding to the two bamboo chip drop guide pieces 30 are arranged to be aligned left and right. After the vertical conveying device 22 conveys the bamboo chips to the top thereof, the bamboo chips will leave the bamboo chip support member 23 under the action of gravity, and the bamboo chips leaving the bamboo chip support member 23 will fall downward under the guidance of the bamboo chip drop guide piece 30, and will be received by the two bamboo chip receiving blocks 110. Compared with the prior art in which the bamboo chip drop guide piece 30 and the corresponding bamboo chip receiving block 110 are separated by a certain distance, the utility model can realize accurate material receiving. Further, in conjunction with FIG. 3 and FIG. 4 , a bamboo piece end clamping mechanism 120 is provided at either end of the two bamboo piece receiving blocks 110 (i.e., at either end of the bamboo piece located on the two bamboo piece receiving blocks 11), and a flipping mechanism 130 is provided at one end of the bamboo piece end clamping mechanism 120 away from the bamboo piece receiving block 110, and the flipping mechanism 130 is transmission-connected with the bamboo piece end clamping mechanism 120 and can drive the bamboo piece end clamping mechanism 120 to flip. The bamboo piece end clamping mechanism 120 clamps the ends of the bamboo pieces held up by the two bamboo piece receiving blocks 110, and the flipping mechanism 130 drives the bamboo piece clamping mechanism 120 to flip while driving one side of the bamboo piece to flip, and the front and back sides of each output bamboo piece can be kept consistent through the bamboo piece end clamping mechanism 120 and the flipping mechanism 130. The bamboo piece end clamping mechanism 120 can be, but is not limited to, a finger cylinder. Furthermore, as shown in Fig. 3 and Fig. 4, a bamboo chip front and back detection device 140 is also suspended on the frame 10 directly above the two bamboo chip receiving blocks 110, and the bamboo chip front and back detection device 140 is electrically connected to the bamboo chip end clamping mechanism 120 and the flipping mechanism 130. The utility model can sense whether the bamboo chip held by the two bamboo chip receiving blocks 110 is facing up or facing up through the bamboo chip front and back detection device 140, thereby controlling the actions of the bamboo chip end clamping mechanism 120 and the flipping mechanism 130. Further, as shown in FIG. 4 , a discharging mechanism 170 is provided on the side of the two bamboo chip receiving blocks 110 away from the vertical conveying device 22, and the discharging mechanism 170 includes a discharging translation cylinder 171 arranged along the lateral direction of the frame 10, and a connecting plate 172 driven by the discharging translation cylinder 171 for translation is connected to the discharging translation cylinder 171, and a bamboo chip clamping cylinder 173 is fixedly provided on the connecting plate 172, and the end of the two bamboo chip receiving blocks 110 away from the bamboo chip end clamping mechanism 120 is the discharging end.The bamboo piece clamping cylinder 173 clamps the bamboo pieces on the two bamboo piece receiving blocks 110, and the discharging translation cylinder 171 drives the connecting plate 172 together with the bamboo piece clamping cylinder 173 and the bamboo pieces to send the bamboo pieces out from the discharging end.

[0032] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A bamboo chip screening machine, comprising a frame and a bamboo chip screening mechanism installed in the frame; the bamboo chip screening mechanism comprises two vertical support frames arranged opposite to each other in the transverse direction of the frame, an annular vertical conveying device installed between the two vertical support frames, and a plurality of bamboo chip supporting members arranged on the conveying surface of the vertical conveying device and distributed along the conveying direction; the transmission shaft of the vertical conveying device is transversely arranged between the two vertical support frames; characterized in that: Two bamboo chip dropping guide plates are also uprightly arranged in the frame, and the two bamboo chip dropping guide plates are placed on the two lateral sides of the bamboo chip screening mechanism; a crossbeam is provided in the frame, and the two bamboo chip dropping guide plates are jointly arranged on the crossbeam, and at least one of the bamboo chip dropping guide plates can slide along the length direction of the crossbeam.

2. The bamboo chip screening machine according to claim 1, characterized in that: A crossbeam is respectively arranged on the upper part and the lower part of the frame, and each bamboo sheet falling guide piece is penetrated on the two crossbeams.

3. The bamboo chip screening machine according to claim 1, characterized in that: One of the bamboo chip blanking guide pieces is fixedly connected to the crossbeam, and the other bamboo chip blanking guide piece can slide along the length direction of the crossbeam.

4. The bamboo chip screening machine according to claim 1, characterized in that: An auxiliary material dropping guide piece is correspondingly arranged between each bamboo chip dropping guide piece and the bamboo chip screening mechanism.

5. The bamboo chip screening machine according to claim 4, characterized in that: The two auxiliary blanking guide pieces are jointly arranged on the crossbeam; one of the bamboo chip blanking guide pieces is fixedly connected to the crossbeam, and the other bamboo chip blanking guide piece can slide along the length direction of the crossbeam; one of the auxiliary blanking guide pieces located between one of the bamboo chip blanking guide pieces and the bamboo chip screening mechanism is fixedly connected to the crossbeam, and the other auxiliary blanking guide piece located between the other bamboo chip blanking guide piece and the bamboo chip screening mechanism can slide along the length direction of the crossbeam.

6. The bamboo chip screening machine according to claim 1, characterized in that: The bamboo chip screening mechanism is slidably arranged on the crossbeam.

7. The bamboo chip screening machine according to claim 1, characterized in that: Each of the bamboo support members is a long strip-shaped plate member, and the vertical conveying device includes two annular vertical conveying chains symmetrically arranged in the transverse direction of the frame, and each of the bamboo support members is transversely erected between the two conveying chains.

8. The bamboo chip screening machine according to claim 1, characterized in that: A rejecting mechanism is arranged on the bamboo chip running path on the feeding side of the vertical conveying device, and the rejecting mechanism includes a pushing cylinder and a pushing plate transmission-connected to the pushing cylinder, and the pushing cylinder drives the pushing plate to push the bamboo chips on the bamboo chip support member off; a bamboo chip quantity detection mechanism is arranged on the feeding side of the bamboo chip screening mechanism, and the bamboo chip quantity detection mechanism is electrically connected to the rejecting mechanism.

9. The bamboo chip screening machine according to claim 1, characterized in that: A bamboo chip receiving block is correspondingly arranged on the bamboo chip guiding path of each bamboo chip blanking guide piece, and the two bamboo chip receiving blocks corresponding to the two bamboo chip blanking guide pieces are aligned left and right.

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