Tea leaf pruning device and method

Abstract

The invention discloses a tea leaf pruning device and method, and belongs to the field of tea planting, the device comprises a base table plate, extension legs are arranged at the four corners of the base table plate, grounding wheels are arranged at the bottom ends of the extension legs, the extension legs and the base table plate are connected through adjusting assemblies, and expansion frames are arranged on the left side and the right side of the base table plate; an expansion cutting mechanism is arranged on the inner side of the expansion frame. When the device is used, the device is pushed into a tea field, according to the planting condition of the tea field, four pin rods are pulled out, the positions of extension legs are adjusted again, and then the extension legs are inserted back, so that a grounding wheel is inserted between two ridges of seedlings, and at the moment, a stepping motor pushes a middle table out when driving a threaded rod to rotate; the middle table can drive the linkage belt to operate while sliding, the expansion frame, the middle table and the extension table are expanded, the three arc-shaped cutters are fully staggered, and the three sets of cutting motors simultaneously drive the arc-shaped cutters to rotate to start to cut leaves protruding out of the top ends of the tea leaves.

Description

Technical Field

[0001] The invention relates to the field of tea planting, and in particular to a tea pruning device and a method thereof. Background Art

[0002] With the development of industrial technology, modern tea planting technology has become more and more perfect. During the growth process of tea, there will be many uneven branches and leaves. These uneven branches and leaves are not convenient for subsequent maintenance and management by staff, such as insect inspection in the field. This requires regular pruning of tea fields. In order to increase the pruning rate, a tea pruning device is needed; Patent No. 201922485224.7 discloses a tea planting and pruning device, which includes a moving mechanism and a power mechanism. The device only requires tea farmers to push the moving mechanism through a rotating wheel installed under a supporting base, and does not require tea farmers to manually prune the tea leaves one by one. The operation is simple and convenient, which greatly reduces the physical effort of tea farmers in pruning. The chute matches the slider, and three chute are provided. Tea leaves of different heights can be pruned by taking out the placement box and moving it to a suitable chute. The operation is convenient, the application range is wide, and the overall practicality of the device is improved. The cutting components on both sides of the protective shell are the same length, and a cutter is installed on the outer side of the rotating belt, which can prune two rows of tea leaves at the same time, greatly improving the pruning speed of the pruning device and reducing the pruning work of tea farmers. The device still has defects when in use. First, the device needs to be stretched out a wide distance when in use, and the device needs to be folded up to reduce the space of the device when being dragged. However, the retracting structure of the device is relatively complex and difficult to operate. Second, the device has no mark after pruning, which makes it easy to miss which row of tea leaves has not been trimmed. Summary of the invention

[0003] The purpose of the present invention is to provide a tea pruning device and method thereof in view of the deficiencies in the prior art. When the device is in use, the device is pushed into a tea field. According to the planting conditions of the tea field, the four pin rods are pulled out, the positions of the extension legs are readjusted, and then inserted back, so that the grounding wheels are inserted between the two ridges of the seedlings. At this time, the stepper motor drives the threaded rod to rotate and pushes the middle platform out. While the middle platform slides, it drives the linkage belt to operate. The linkage belt allows the extension platform in the middle of the middle platform to extend at the same time. The sliding speed of the middle platform relative to the expansion frame is equal to the sliding speed of the extension platform relative to the middle platform. The expansion frame, the middle platform, and the extension platform are expanded and the three arc knives are fully staggered. The three sets of cutting motors simultaneously drive the arc knives to rotate and start cutting the protruding leaves at the top of the tea leaves.

[0004] In order to solve the above problems, the present invention provides the following technical solutions: a tea pruning device, comprising a base plate, four corners of the base plate are provided with extension legs, the bottom ends of the extension legs are provided with grounding wheels, the extension legs and the base plate are connected by an adjustment component, the left and right sides of the base plate are provided with expansion frames, the inner side of the expansion frame is provided with an expansion and cutting mechanism, the front end of the base plate is provided with a marking and cutting component, and the rear end of the base plate is provided with a nutrient solution spraying component, The marking and cutting assembly and the nutrient solution spraying assembly are connected to the lifting assembly, the expansion and cutting mechanism includes an intermediate table slidably mounted on the inner side of the expansion frame, an extension table is slidably mounted on the inner side of the intermediate table, two guide bars are arranged in the middle of the expansion frame and the intermediate table, the guide bars are attached to the side walls of the intermediate table and the extension table, a storage groove is arranged in the middle of the expansion frame, the intermediate table and the extension table, a cutting rod is rotatably mounted in the middle of the storage groove, an arc-shaped knife is mounted on the end of the cutting rod, and the cutting rod is mounted on the output end of the cutting motor, the expansion frame, the intermediate table and the extension table have the same thickness, the width of the cutting motor and the arc-shaped knife is smaller than the thickness of the expansion frame, and the expansion frame, the intermediate table and the extension table are connected to the contraction mechanism.

[0005] Furthermore, the contraction mechanism includes two torsion openings on the side walls of the middle platform, a movable pulley is rotatably installed inside the torsion opening, a linkage belt is connected between the movable pulleys, two fixed blocks are provided on the linkage belt, the fixed blocks are respectively connected to the side walls of the expansion frame and the extension platform, a stepper motor is also fixedly installed on the top of the expansion frame, a threaded rod is installed at the output end of the stepper motor, and a threaded channel matching the threaded rod is provided on the side wall of the middle platform.

[0006] Furthermore, the adjustment component includes positioning holes at the top ends of the extension legs, the positioning holes are in a straight line array, and the positioning holes and the side walls of the base plate are connected by pins.

[0007] Furthermore, the marking and cutting assembly includes a shearing bridge above the base plate, a hoisting plate is provided at the bottom end of the shearing bridge, two inclined plates are provided at the bottom end of the hoisting plate, a chopping motor is installed at the top end of the inclined plate, and a chopping wheel is installed at the output end of the chopping motor.

[0008] Furthermore, the inclined plate and the hanging plate form an angle of thirty degrees, and the hanging plate and the inclined plate are made of hard plastic, and the top of the inclined plate is fixedly connected to the bottom surface of the hanging plate by bolts.

[0009] Furthermore, the nutrient solution spraying assembly includes a spraying bridge above the base plate, two nozzles are arranged on the side walls of the spraying bridge, the nozzles are connected to the liquid supply assembly, two steering pins are arranged at the bottom ends of the nozzles, and two groups of steering holes are also arranged on the side walls of the spraying bridge, and the connecting lines between each group of steering holes form an equilateral right triangle.

[0010] Furthermore, the liquid supply assembly includes a nutrient solution tank and a water pump at the top of the base plate, the input pipe of the water pump extends into the nutrient solution tank, the output rod of the water pump is connected to two nozzles through a bifurcated pipe, and the nutrient solution tank is filled with tea seedling nutrient solution.

[0011] Furthermore, the lifting assembly includes two groups of front and rear hinge blocks at the top of the base plate, a torsion arm is rotatably installed at the top of the hinge block, the angle of the torsion arm is locked by a pin, a translation plate is rotatably installed at the top of each group of torsion arms, the shear bridge is connected to the top of the front group of translation plates, the spray bridge is connected to the top of the rear group of translation plates, and a pulling mechanism is arranged in the middle of the translation plate.

[0012] Furthermore, the pulling mechanism comprises a double-headed electric push rod, and the front and rear output rods of the double-headed electric push rod are respectively hinged to the side walls of the two translation plates.

[0013] Further, the following steps are included: S1. Push the device to the tea field. According to the planting conditions of the tea field, pull out the four pins, readjust the position of the extension legs, and then insert them back, so that the grounding wheel is inserted between the two ridges of the seedlings. At this time, the stepper motor drives the threaded rod to rotate and push the middle table out. While the middle table slides, it will drive the linkage belt to operate. The linkage belt will make the extension table in the middle of the middle table extend at the same time. The sliding speed of the middle table relative to the expansion frame is equal to the sliding speed of the extension table relative to the middle table. The expansion frame, the middle table, and the extension table are expanded and the three arc knives are fully staggered. The three sets of cutting motors drive the arc knives to rotate at the same time to start cutting the protruding leaves at the top of the tea leaves; S2. The double-headed electric push rod drives the two output rods to contract or extend, and then the two sets of torsion arms begin to twist at a certain angle. After the twisting of the torsion arms is completed, the angle of the torsion arms is locked by pins, and the shear bridge is pushed down a short distance to allow the chopping wheel to enter the cutting position. The inclined plate drives the chopping wheel to rotate and cut the tea leaves. The cutting surface of the chopping wheel is straight. The ridge that the base plate passes through is cut differently from other ridges, which has a marking effect. The results of pruning can be checked to prevent missing any ridge that has not been pruned; S3. The water pump extracts the plant nutrient solution from the nutrient solution tank and conveys it to the two nozzles. The nozzles are turned horizontally when spraying and stand upright when not in use. When storing and unfolding the nozzles, first pull out the steering pin at the bottom, turn the nozzle 90 degrees, and then insert it into the other steering hole.

[0014] Beneficial effects of the present invention: First, when the device is in use, it is pushed into the tea field. According to the planting conditions of the tea field, the four pin rods are pulled out, the positions of the extension legs are readjusted, and then inserted back, so that the grounding wheels are inserted between the two ridges of the seedlings. At this time, the stepper motor drives the threaded rod to rotate and pushes the middle table out. While the middle table slides, it drives the linkage belt to operate. The linkage belt will extend the extension table in the middle of the middle table at the same time. The sliding speed of the middle table relative to the expansion frame is equal to the sliding speed of the extension table relative to the middle table. The expansion frame, the middle table, and the extension table expand and allow the three arc knives to be fully staggered. The three sets of cutting motors simultaneously drive the arc knives to rotate and start cutting the protruding leaves at the top of the tea leaves.

[0015] Secondly, the double-headed electric push rod drives the two output rods to contract or extend, and then the two sets of torsion arms begin to twist at a certain angle. After the torsion arms are twisted, the angles of the torsion arms are locked by pins, and the shear bridge is pushed down a short distance to allow the chopping wheel to enter the cutting position. The inclined plate drives the chopping wheel to rotate to cut the tea leaves. The cutting surface of the chopping wheel is flat, and the ridge that the base plate passes through is cut differently from other ridges, which has a marking effect. The pruning results can be checked to prevent missing any ridge that has not been pruned.

[0016] Thirdly, the water pump draws the plant nutrient solution inside the nutrient solution tank and conveys it to the two nozzles. The nozzles are turned horizontally when spraying and are erected when not in use. When storing and unfolding the nozzles, first pull out the steering pin at the bottom, turn the nozzle 90 degrees, and then insert it into the other steering hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front view of the present invention.

[0018] Figure 2 It is a schematic diagram of a side view of the present invention.

[0019] Figure 3 It is a schematic diagram of the extension leg of the present invention.

[0020] Figure 4 It is a schematic diagram of a nutrient solution tank of the present invention.

[0021] Figure 5 Schematic diagram of the shear bridge of the present invention.

[0022] Figure 6 Schematic diagram of the expansion framework of the present invention.

[0023] Figure 7 It is a schematic diagram of an arc knife of the present invention.

[0024] Figure 8 Schematic diagram of the spray bridge of the present invention.

[0025] Description of reference numerals: Base plate 1, extension leg 2, grounding wheel 201, positioning hole 202, pin rod 203, expansion frame 3, intermediate platform 301, extension platform 302, stepping motor 303, threaded rod 304, guide strip 305, movable pulley 306, linkage belt 307, fixing block 308, storage slot 309, cutting motor 310, cutting rod 311, arc knife 312, torsion arm 4, hinge block 401, translation plate 5, shear bridge 6, lifting plate 601, tilting plate 602, chopping motor 603, chopping wheel 604, spraying bridge 7, nozzle 701, steering pin 702, steering hole 703, double-headed electric push rod 8, nutrient solution tank 9, water pump 10. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] Reference Figures 1 to 8A tea pruning device shown in the figure comprises a base plate 1, wherein the four corners of the base plate 1 are provided with extension legs 2, the bottom ends of the extension legs 2 are provided with grounding wheels 201, the extension legs 2 and the base plate 1 are connected via an adjustment component, the left and right sides of the base plate 1 are provided with expansion frames 3, the inner side of the expansion frames 3 is provided with an expansion and cutting mechanism, the front end of the base plate 1 is provided with a marking and cutting component, and the rear end of the base plate 1 is provided with a nutrient solution spraying component, The marking and cutting assembly and the nutrient solution spraying assembly are connected to the lifting assembly, the expansion and cutting mechanism includes an intermediate table 301 slidably mounted on the inner side of the expansion frame 3, an extension table 302 is slidably mounted on the inner side of the intermediate table 301, two guide bars 305 are arranged in the middle of the expansion frame 3 and the intermediate table 301, the guide bars 305 are attached to the side walls of the intermediate table 301 and the extension table 302, a storage groove 309 is arranged in the middle of the expansion frame 3, the intermediate table 301 and the extension table 302, a cutting rod 311 is rotatably mounted in the middle of the storage groove 309, an arc knife 312 is mounted on the end of the cutting rod 311, and the cutting rod 311 is mounted on the output end of the cutting motor 310, the expansion frame 3, the intermediate table 301 and the extension table 302 are arranged in the middle The thickness of the intermediate platform 301 and the extension platform 302 is the same, and the width of the cutting motor 310 and the arc knife 312 is less than the thickness of the expansion frame 3. The expansion frame 3, the intermediate platform 301, and the extension platform 302 are connected to the contraction mechanism. The expansion frame 3, the intermediate platform 301, and the extension platform 302 are expanded and the three arc knives 309 are fully staggered. The three sets of cutting motors 310 simultaneously drive the arc knife 312 to rotate and start cutting the protruding leaves at the top of the tea leaves, achieving the effect of a convenient storage and stretching device. When the expansion frame 3, the intermediate platform 301, and the extension platform 302 are combined together, the arc knife 312 is fully rotated to a horizontal state, so that the upper and lower edges of the arc knife 312 will not protrude from the upper and lower end surfaces of the storage groove 309.

[0029] like Figure 1 , 6 As shown, the contraction mechanism includes two torsion openings on the side wall of the middle platform 301, and a movable pulley 306 is rotatably installed inside the torsion opening, and a linkage belt 307 is connected between the movable pulleys 306. Two fixed blocks 308 are arranged on the linkage belt 307, and the fixed blocks 308 are respectively connected to the side walls of the expansion frame 3 and the extension platform 302. A stepper motor 303 is also fixedly installed on the top of the expansion frame 3, and a threaded rod 304 is installed at the output end of the stepper motor 303. A threaded channel matching the threaded rod 304 is arranged on the side wall of the middle platform 301. When the stepper motor 303 drives the threaded rod 304 to rotate, the middle platform 301 is pushed out, and the middle platform 301 will drive the linkage belt 307 to operate while sliding, and the linkage belt 307 will allow the extension platform 302 in the middle of the middle platform 301 to extend or retract at the same time.

[0030] like Figure 1 , 3 As shown, the adjustment component includes a positioning hole 202 at the top of the extension leg 2, and the positioning holes 202 are in a straight line array. The positioning holes 202 and the side walls of the base plate 1 are connected by pins 203. The four pins 203 are pulled out and the position of the extension leg 2 is readjusted and then inserted back, so that the grounding wheel 201 is inserted between the two ridges of the seedlings.

[0031] like Figure 1 , 5 As shown, the marking and cutting component includes a shearing bridge 6 above the base plate 1, a hanging plate 601 is provided at the bottom end of the shearing bridge 6, and two inclined plates 602 are provided at the bottom end of the hanging plate 601. A chopping motor 603 is installed at the top of the inclined plate 602, and a chopping wheel 604 is installed at the output end of the chopping motor 603. The shearing bridge 6 is pushed down a short distance to allow the chopping wheel 604 to enter the cutting position, and the inclined plate 602 drives the chopping wheel 604 to rotate to cut the tea leaves. The cutting surface of the chopping wheel 604 is straight, and the ridge that the base plate 1 passes through is cut differently from other ridges, which has a marking effect, and the pruning results can be checked to prevent missing any ridge that has not been pruned.

[0032] like Figure 1 , 5 As shown, the inclined plate 602 and the hanging plate 601 form an angle of thirty degrees, and the hanging plate 601 and the inclined plate 602 are made of hard plastic. The top of the inclined plate 602 is fixedly connected to the bottom of the hanging plate 601 by bolts. The inclined plate 602 and the hanging plate 601 made of hard plastic are relatively light in weight, and the inclined plate 602 of different angles can be replaced according to the conditions of the tea trees.

[0033] like Figure 1 , 8 As shown, the nutrient solution spraying assembly includes a spraying bridge 7 above the base plate 1, and two spray pipes 701 are arranged on the side wall of the spraying bridge 7, and the spray pipes 701 are connected to the liquid supply assembly. Two steering pins 702 are arranged at the bottom end of the spray pipes 701, and two groups of steering holes 703 are also arranged on the side wall of the spraying bridge 7. The connecting lines between each group of steering holes 703 form an equilateral right triangle. The spray pipes 701 are erected when not in use. When the spray pipes 701 are stored and unfolded, the steering pins 702 at the bottom are pulled out first, and the spray pipes 701 are turned ninety degrees and then inserted into another steering hole 703.

[0034] like Figure 1 , 4As shown, the liquid supply assembly includes a nutrient solution tank 9 and a water pump 10 at the top of the base plate 1. The input pipe of the water pump 10 extends into the nutrient solution tank 9. The output rod of the water pump 10 is connected to two nozzles 701 through a bifurcated pipe. The nutrient solution tank 9 is filled with nutrient solution for tea seedlings. The water pump 10 extracts the plant nutrient solution in the nutrient solution tank 9 and conveys it to the two nozzles 701. Timely replenishment of nutrient solution for pruned branches and leaves can reduce tissue necrosis.

[0035] like Figure 1 , 2 As shown in Figure 3, the lifting assembly includes two groups of front and rear hinge blocks 401 on the top of the base plate 1, and a torsion arm 4 is rotatably installed on the top of the hinge block 401. The angle of the torsion arm 4 is locked by a pin, and a translation plate 5 is rotatably installed on the top of each group of torsion arms 4. The shear bridge 6 is connected to the top of the front group of translation plates 5, and the spray bridge 7 is connected to the top of the rear group of translation plates 5. A pulling mechanism is arranged in the middle of the translation plate 5. When the two groups of torsion arms 4 start to twist, the translation plate 5 will rise and fall at the top of the torsion arm 4, so that the shear bridge 6 and the spray bridge 7 can reach the processing height.

[0036] like Figure 1 , 2 As shown, the pulling mechanism includes a double-headed electric push rod 8, and the front and rear output rods of the double-headed electric push rod 8 are respectively hinged to the side walls of the two translation plates 5. The double-headed electric push rod 8 drives the two output rods to contract or extend, and then the two groups of torsion arms 4 begin to twist to a certain angle. After the torsion arms 4 are twisted, the angles of the torsion arms 4 are locked by pins, thereby achieving the effect of providing lifting power.

[0037] The following steps are involved: S1. Push the device to the tea field. According to the planting conditions of the tea field, pull out the four pins 203, readjust the position of the extension legs 2, and then insert them back, so that the grounding wheel 201 is inserted between the two ridges of the seedlings. At this time, the stepper motor 303 drives the threaded rod 304 to rotate and pushes the middle platform 301 out. While the middle platform 301 slides, it will drive the linkage belt 307 to operate. The linkage belt 307 will make the extension platform 302 in the middle of the middle platform 301 extend at the same time. The sliding speed of the middle platform 301 relative to the expansion frame 3 is equal to the sliding speed of the extension platform 302 relative to the middle platform 301. The expansion frame 3, the middle platform 301, and the extension platform 302 expand and make the three arc knives 309 fully staggered. The three sets of cutting motors 310 simultaneously drive the arc knives 312 to rotate and start cutting the protruding leaves at the top of the tea leaves; S2. The double-headed electric push rod 8 drives the two output rods to contract or stretch, and then the two sets of torsion arms 4 begin to twist at a certain angle. After the twisting of the torsion arms 4 is completed, the angle of the torsion arms 4 is locked by the pins, and the shear bridge 6 is pushed down a short distance to allow the chopping wheel 604 to enter the cutting position. The inclined plate 602 drives the chopping wheel 604 to rotate to cut the tea leaves. The cutting surface of the chopping wheel 604 is straight. The ridge that the base plate 1 passes through is cut differently from other ridges, which has a marking effect. The results of pruning can be checked to prevent missing any ridge that has not been pruned; S3. The water pump 10 extracts the plant nutrient solution in the nutrient solution tank 9 and conveys it to the two nozzles 701. The nozzles 701 are turned sideways when spraying and are erected when not in use. When the nozzles 701 are stored and unfolded, the steering pin 702 at the bottom is first pulled out, and the nozzles 701 are turned ninety degrees and then inserted into another steering hole 703.

[0038] Working principle: the expansion frame 3, the middle platform 301, and the extension platform 302 are expanded and the three arc-shaped knives 309 are fully staggered. The three sets of cutting motors 310 simultaneously drive the arc-shaped knives 312 to rotate and start cutting the protruding leaves at the top of the tea leaves, realizing the effect of convenient storage and extension device. When the expansion frame 3, the middle platform 301, and the extension platform 302 are combined together, the arc-shaped knives 312 are all rotated to a horizontal state, so that the upper and lower edges of the arc-shaped knives 312 will not protrude from the upper and lower end surfaces of the storage slot 309. When the stepping motor 303 drives the threaded rod 304 to rotate The middle platform 301 is pushed out, and the middle platform 301 will drive the linkage belt 307 to operate while sliding. The linkage belt 307 will make the extension platform 302 in the middle of the middle platform 301 extend or retract at the same time, and the four pins 203 are pulled out, and the position of the extension legs 2 is readjusted and then inserted back, so that the ground wheel 201 is inserted between the two ridges of the seedlings, and the shear bridge 6 is pushed down a short distance to allow the chopping wheel 604 to enter the cutting position, and the inclined plate 602 drives the chopping wheel 604 to rotate to cut the tea leaves, and the cutting surface of the chopping wheel 604 is straight The ridge that the base plate 1 passes through is cut differently from other ridges, which has a marking effect. The results of pruning can be checked to prevent missing any ridge that has not been pruned. The tilting plate 602 and the hanging plate 601 made of hard plastic are relatively light in weight, and the tilting plates 602 of different angles can be replaced according to the conditions of the tea trees. The nozzle 701 is erected when not in use. When the nozzle 701 is stored and unfolded, the steering pin 702 at the bottom is pulled out first, and the nozzle 701 is turned 90 degrees and then inserted into another steering hole 703. The water pump 10 extracts the nutrient solution from the tank 9 The plant nutrient solution inside is escorted to the two nozzles 701. Timely replenishing of nutrient solution for pruned branches and leaves can reduce tissue necrosis. A pulling mechanism is arranged in the middle of the translation plate 5. When the two groups of torsion arms 4 begin to twist, the translation plate 5 will rise and fall at the top of the torsion arms 4, so that the shear bridge 6 and the spray bridge 7 can reach the processing height. The double-headed electric push rod 8 drives the two output rods to contract or stretch, so that the two groups of torsion arms 4 begin to twist at a certain angle. After the torsion arms 4 are twisted, the angle of the torsion arms 4 is locked by pins, thereby achieving the effect of providing lifting power.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tea pruning device, characterized in that: The invention comprises a base plate (1), wherein the four corners of the base plate (1) are each provided with an extension leg (2), the bottom end of the extension leg (2) is provided with a grounding wheel (201), the extension leg (2) and the base plate (1) are connected via an adjustment component, the left and right sides of the base plate (1) are each provided with an expansion frame (3), the inner side of the expansion frame (3) is provided with an expansion cutting mechanism, the front end of the base plate (1) is provided with a marking cutting component, and the rear end of the base plate (1) is provided with a nutrient solution spraying component. The marking cutting component and the nutrient solution spraying component are connected to the lifting component. The expansion cutting mechanism comprises an intermediate platform (301) slidably mounted on the inner side of the expansion frame (3). An extension platform (302) is slidably mounted on the inner side of the intermediate platform (301). Two guide bars (305) are arranged in the middle of the expansion frame (3) and the intermediate platform (301). The guide bars (305) are attached to the side walls of the intermediate platform (301) and the extension platform (302). A storage space is arranged in the middle of the expansion frame (3), the intermediate platform (301) and the extension platform (302). A slot (309) is provided, wherein a cutting rod (311) is rotatably mounted in the middle of the storage slot (309), an arc-shaped knife (312) is mounted at the end of the cutting rod (311), and the cutting rod (311) is mounted on the output end of the cutting motor (310). The expansion frame (3), the intermediate table (301), and the extension table (302) have the same thickness, the width of the cutting motor (310) and the arc-shaped knife (312) is smaller than the thickness of the expansion frame (3), and the expansion frame (3), the intermediate table (301), and the extension table (302) are connected to a contraction mechanism.

2. A tea pruning device according to claim 1, characterized in that: The contraction mechanism comprises two torsion ports on the side wall of the intermediate platform (301), a movable pulley (306) is rotatably mounted inside the torsion ports, a linkage belt (307) is connected between the movable pulleys (306), two fixing blocks (308) are arranged on the linkage belt (307), the fixing blocks (308) are respectively connected to the side walls of the expansion frame (3) and the extension platform (302), a stepping motor (303) is also fixedly mounted on the top of the expansion frame (3), a threaded rod (304) is mounted on the output end of the stepping motor (303), and a threaded channel matching the threaded rod (304) is arranged on the side wall of the intermediate platform (301).

3. A tea pruning device according to claim 1, characterized in that: The adjustment component comprises a positioning hole (202) at the top end of the extension leg (2), the positioning holes (202) are arranged in a straight line array, and the positioning holes (202) and the side wall of the base plate (1) are plugged in via a pin rod (203).

4. A tea pruning device according to claim 1, characterized in that: The marking cutting component comprises a shearing bridge (6) above a base plate (1); a hanging plate (601) is arranged at the bottom end of the shearing bridge (6); two inclined plates (602) are arranged at the bottom end of the hanging plate (601); a chopping motor (603) is installed at the top end of the inclined plate (602); and a chopping wheel (604) is installed at the output end of the chopping motor (603).

5. A tea pruning device according to claim 4, characterized in that: The inclined plate (602) and the hanging plate (601) form an angle of thirty degrees, and the hanging plate (601) and the inclined plate (602) are made of hard plastic. The top of the inclined plate (602) is fixedly connected to the bottom of the hanging plate (601) by bolts.

6. A tea leaf trimming device according to claim 1, characterized in that: The nutrient solution spraying assembly comprises a spraying bridge (7) above a base plate (1); two spray pipes (701) are arranged on the side wall of the spraying bridge (7); the spray pipes (701) are connected to the liquid supply assembly; two steering pins (702) are arranged at the bottom ends of the spray pipes (701); two groups of steering holes (703) are also arranged on the side wall of the spraying bridge (7); and the connecting lines between each group of steering holes (703) form an equilateral right triangle.

7. A tea pruning device according to claim 6, characterized in that: The liquid supply assembly comprises a nutrient solution tank (9) and a water pump (10) at the top of the base plate (1); an input pipe of the water pump (10) extends into the interior of the nutrient solution tank (9); an output rod of the water pump (10) is connected to two spray pipes (701) via a bifurcated pipe; and tea seedling nutrient solution is poured into the interior of the nutrient solution tank (9).

8. The tea pruning device according to claim 1, characterized in that: The lifting assembly comprises two groups of front and rear hinge blocks (401) at the top of the base plate (1); a torsion arm (4) is rotatably mounted on the top of the hinge block (401); the angle of the torsion arm (4) is locked by a pin; a translation plate (5) is rotatably mounted on the top of each group of torsion arms (4); a shear bridge (6) is connected to the top of the front group of translation plates (5); a spray bridge (7) is connected to the top of the rear group of translation plates (5); and a pulling mechanism is arranged in the middle of the translation plates (5).

9. A tea leaf trimming device according to claim 8, characterized in that: The pulling mechanism comprises a double-headed electric push rod (8), and front and rear output rods of the double-headed electric push rod (8) are respectively hinged to the side walls of the two translation plates (5).

10. A method for pruning tea leaves according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Push the device into the tea field. According to the planting conditions of the tea field, pull out the four pins (203), readjust the position of the extension legs (2), and then insert them back, so that the grounding wheel (201) is inserted between the two ridges of the seedlings. At this time, the stepping motor (303) drives the threaded rod (304) to rotate and pushes the middle platform (301) out. While the middle platform (301) slides, it drives the linkage belt (307) to operate. The linkage belt (307) allows the extension platform (302) in the middle of the middle platform (301) to extend at the same time. The sliding speed of the middle platform (301) relative to the expansion frame (3) is equal to the sliding speed of the extension platform (302) relative to the middle platform (301). The expansion frame (3), the middle platform (301), and the extension platform (302) expand and allow the three arc-shaped knives (312) to be fully staggered. The three sets of cutting motors (310) simultaneously drive the arc-shaped knives (312) to rotate and start cutting the protruding leaves at the top of the tea leaves; S2. The double-headed electric push rod (8) drives the two output rods to contract or extend, and then the two sets of torsion arms (4) begin to twist at a certain angle. After the twisting of the torsion arms (4) is completed, the angle of the torsion arms (4) is locked by a pin, and the shear bridge (6) is pushed down a short distance to allow the chopping wheel (604) to enter the cutting position. The inclined plate (602) drives the chopping wheel (604) to rotate to cut the tea leaves. The cutting surface of the chopping wheel (604) is flat. The ridge that the base plate (1) passes through is cut differently from other ridges, which has a marking effect. The results of pruning can be checked to prevent missing a ridge that has not been pruned. S3. The water pump (10) extracts the plant nutrient solution in the nutrient solution tank (9) and conveys it to the two spray pipes (701). The spray pipes (701) are turned sideways when spraying and are erected when not in use. When the spray pipes (701) are stored or unfolded, the steering pin (702) at the bottom is first pulled out, and the spray pipes (701) are turned 90 degrees and then inserted into the other steering hole (703).

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