Tea harvesting and grading method with adjustable grading standard

Abstract

A tea harvesting and grading method with an adjustable grading standard comprises the steps that firstly, a tea harvesting and grading device with the adjustable grading standard is provided and comprises a first-stage feeding unit and a second-stage feeding unit, the second-stage feeding unit is located at the position, close to the rear portion, above the first-stage feeding unit and corresponds to the first-stage feeding unit in a one-to-one mode, and the first-stage feeding unit and the second-stage feeding unit are in one-to-one correspondence; the tail end of the first-stage feeding unit is located above the first-stage collecting chamber, the tail end of the second-stage feeding unit is located above the second-stage collecting chamber, and the distance between the first-stage feeding unit and the second-stage feeding unit in the vertical direction is adjusted through installation between the protrusions and the installation holes. 2) blending the device; (3) picking tea leaves; and 4) classifying and collecting the tea leaves. Different tea leaf picking and grading standards can be set by adjusting the positions of the two feeding units, tea leaves are graded according to the lengths of different tea leaves during tea leaf picking, subsequent tea leaf treatment is reduced, the tea leaf picking and grading processes are efficiently and conveniently completed, and the tea leaf picking and grading device can also have high adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tea, in particular to a tea harvesting and grading method with adjustable grading standards. BACKGROUND

[0002] China is the country with the largest number of tea drinkers and the country of origin of tea, with a long history of tea production. It is also the country with the highest quality requirements for tea raw materials in the world. For example, the raw materials for famous tea are mostly one bud and one leaf or one bud and two leaves, and there are certain requirements for the length of the raw materials. This requires that the buds and leaves be uniform in size and moderate in length when picked. According to the requirements of tea processing, different standards of tea need to be classified and picked. The traditional way of picking tea is by hand. Although the standard of the picked tea can be controlled artificially, there are still differences in the tea picked by each person, and it is difficult to control accurately. Moreover, the cost of labor is becoming more and more expensive, and the number of tea pickers is decreasing. Therefore, it is difficult to realize the large-scale development of the tea industry by relying solely on manual picking to control the standard of tea.

[0003] In the prior art, most of the grading methods for different lengths of tea are to separate tea leaves of different lengths after picking by mechanical screening or intelligent color selection. First, because tea leaves of different sizes and shapes are intertwined, mechanical screening will increase the friction and collision between tea leaves and between tea leaves and the screen, and the effect is generally not ideal. Intelligent color selection uses a color sorter, which has good grading effect but is very expensive and requires additional costs for tea handling, feeding and sorting, etc. The existing methods that can grade tea leaves of different sizes, such as a picking and grading integrated machine using a pull-cut method (CN114503830A), use the characteristics of tea buds growing straight up and combine a primary transmission and a secondary transmission structure to pick and grade fresh leaves according to the length of tea leaves growing at different heights on tea trees. Although this mechanism realizes picking and grading according to the length of tea leaves at the same time, it has strong limitations and cannot adjust the grading standard, making it difficult to meet the different requirements of different tea varieties and grades for fresh leaf picking. Therefore, it is necessary to propose a tea harvesting and grading method with adjustable grading standards. SUMMARY

[0004] The present application relates to the field of tea, in particular to a tea harvesting and grading method with adjustable grading standards.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a tea harvesting and grading method with adjustable grading standards, characterized by comprising the following steps:

[0006] I) provide a tea harvesting and grading device with adjustable grading standards, the device comprising:

[0007] a frame body, the frame body being provided with a collection chamber, the collection chamber comprising a secondary collection chamber and a primary collection chamber, the secondary collection chamber being located above the primary collection chamber, the inlet of the primary collection chamber being located horizontally between the front end of the frame body and the inlet of the secondary collection chamber, the outlet of the secondary collection chamber and the outlet of the primary collection chamber being staggered left and right on the rear end of the frame body;

[0008] a feeding mechanism, the feeding mechanism being provided on the frame body in front of the collection chamber, the feeding mechanism comprising at least one primary feeding unit and one secondary feeding unit, the secondary feeding unit being located above the primary feeding unit at a rear position, and the two corresponding to each other, the tail end of the primary feeding unit being located above the primary collection chamber, the tail end of the secondary feeding unit being located above the secondary collection chamber, all the feeding units being composed of at least a conveyor belt and a plurality of pulleys, the pulleys being provided with a plurality of protrusions on the outside, the conveyor belt being provided with a plurality of mounting holes, the protrusions being capable of being fitted and mounted with the mounting holes, the conveyor belt being sleeved on the plurality of pulleys to form a loop, and the rear end of the primary feeding unit and the front end of the secondary feeding unit sharing a set of pulleys;

[0009] a collection unit, the collection unit being provided in the collection chamber for transporting tea leaves in the collection chamber from the inlet of the collection chamber to the outlet of the collection chamber;

[0010] a cutting assembly, the cutting assembly being connected with the frame body and located below the primary feeding unit at a front position;

[0011] II) device deployment;

[0012] III) tea picking;

[0013] IV) grading and collecting tea.

[0014] It should be noted in this application that the protrusions on the pulley are distributed circumferentially along the outer wall of the pulley, and are aligned in the vertical direction and also in the horizontal direction. Overall, the plurality of protrusions can be understood as being distributed in a ring shape on the outer surface of the pulley, and the pulley is provided with a plurality of layers of such "ring shapes".

[0015] Preferably, in step I), the adjacent primary feeding units and the secondary feeding units are symmetrically arranged;

[0016] The primary feeding unit comprises a first conveying assembly and a second conveying assembly, and a first conveying channel is formed between the first conveying assembly and the second conveying assembly, and the first conveying channels in each primary feeding unit are parallel to each other.

[0017] The secondary feeding unit comprises a third conveying assembly and a fourth conveying assembly, the third conveying assembly is arranged at a rear position above the first conveying assembly, the fourth conveying assembly is arranged at a rear position above the second conveying assembly, a second conveying channel is formed between the third conveying assembly and the fourth conveying assembly, and the second conveying channels in each of the secondary feeding units are parallel to each other;

[0018] The rear end of the conveying belt in the first conveying assembly and the front end of the conveying belt in the third conveying assembly are sleeved on a common belt pulley, and the rear end of the conveying belt in the second conveying assembly and the front end of the conveying belt in the fourth conveying assembly are sleeved on another common belt pulley;

[0019] The feeding mechanism further comprises a plurality of bases, the bases are connected with the frame body, the bases are arranged above the belt pulleys, and the plurality of belt pulleys are rotationally connected with the bases.

[0020] Preferably, the collecting unit assembly comprises:

[0021] A plurality of air ducts are arranged on the frame body, and the air ducts assist the tea leaves in moving from the entrances of the collecting chambers to the exits of the corresponding collecting chambers by sending air into the collecting chambers;

[0022] A collecting assembly is arranged at the bottom of each collecting chamber, and is used to transport the tea leaves falling thereon to the exit of the collecting chamber where the collecting assembly is arranged;

[0023] The exits of the secondary collecting chambers and the exit of the primary collecting chamber are arranged side by side in the horizontal direction at the rear end of the frame body.

[0024] In this application, the air in the air ducts is sourced from a fan, the air blown by the fan is sent into each collecting chamber through the air duct, and the tea leaves in each collecting chamber can be assisted to be driven, and each feeding unit can be assisted to be discharged, that is, the effect that can be achieved by the conveying power of the air duct is that the longer tea leaves can be prevented from being stuck on the secondary feeding unit, and the shorter tea leaves can be prevented from being stuck on the primary feeding unit, when the tea leaves are transported by each feeding unit to the tail end of the corresponding conveying channel, the air power can assist the tea leaves to fall into the corresponding collecting chamber, and can also assist the conveying assembly to move the tea leaves falling in each collecting chamber to the exit of the corresponding collecting chamber, and can also prevent the tea leaves from being stuck in the conveying assembly of each collecting chamber.

[0025] Preferably, at least one first baffle is arranged in the secondary collecting chamber, the first baffle is arranged in an inclined manner, and the space in the secondary collecting chamber is in a shrinking state from the entrance of the secondary collecting chamber to the exit of the secondary collecting chamber;

[0026] Preferably, at least one second baffle plate is arranged in the primary collecting chamber, and the second baffle plate 38 is arranged in an inclined manner, so that the space in the primary collecting chamber is in a converging state from the entrance of the primary collecting chamber to the exit of the secondary collecting chamber.

[0027] In the present application, the first baffle plate and the second baffle plate can assist and guide the tea leaves in the corresponding collecting chamber to move from the exit of the corresponding collecting chamber to the exit of the corresponding collecting chamber.

[0028] Preferably, the bottom of the primary collecting chamber is used as the top of the secondary collecting chamber, and in the horizontal direction, the front end of the top of the secondary collecting chamber is located more rearward on the overall position of the frame body than the front end of the bottom of the secondary collecting chamber, so as to form the entrance of the secondary collecting chamber.

[0029] In the present application, it can be understood that the distance from the front end of the bottom of the secondary collecting chamber to the vertical plane is greater than the distance from the top of the secondary collecting chamber to the vertical plane.

[0030] Preferably, the feeding mechanism is arranged in an inclined manner relative to the collecting chamber and the bottom of the frame body, and the inclined direction of the feeding mechanism extends in a gradually rising trend from the front end to the rear end.

[0031] In the present application, it is necessary to explain that the meaning of each first conveying channel and each second conveying channel in the above is that each first conveying channel refers to the first conveying channel formed by a different first feeding unit, rather than a plurality of first conveying channels formed in one primary feeding unit, and the same applies to each second conveying channel. In the present application, only one corresponding conveying channel is formed in one feeding unit.

[0032] In the present application, the positional relationship of the primary feeding unit, the secondary feeding unit, and the base is that the primary feeding unit and the secondary feeding unit are arranged below the base, and the secondary feeding unit is located at a rearward position above the primary feeding unit, as described above. A common belt pulley is provided between the primary feeding unit and the secondary feeding unit. When installing, the conveying assembly of the secondary feeding unit is first installed below the base, and then the conveying assembly of the primary feeding unit is installed below the conveying assembly of the secondary feeding unit.

[0033] The first conveying assembly and the second conveying assembly form a first conveying channel and a feeding port therebetween, the feeding port gradually converges from the front end of the feeding unit to the first conveying channel, and the feeding port is surrounded by at least two inclined surfaces.

[0034] The tea leaves are collected into the first conveying channel from the feeding port, the feeding unit clamps and transports the tea leaves through the first conveying assembly and the second conveying assembly, the shorter tea leaves fall into the first-stage collecting chamber from the rear end of the first conveying channel, and the longer tea leaves are continuously clamped and transported along the second conveying channel into the second-stage collecting chamber, thereby realizing grading of tea leaves of different lengths.

[0035] In the present application, it needs to be further explained that the feeding port is arranged at the front end of the conveying channel, the discharging port is arranged at the rear end of the conveying channel, and the three are sequentially communicated, and from the two inclined surfaces in the foregoing, it can be reasonably understood that the two inclined surfaces are respectively located on the first conveying assembly and the second conveying assembly, and in addition, the reference standards of front and rear in the present application are that the part contacting the tea leaves first is front, and the part contacting the tea leaves last is rear.

[0036] The outer side wall of the belt pulley is provided with a plurality of protrusions, and the conveying belt is provided with a plurality of mounting holes, the protrusions can be mounted in the mounting holes, preventing the conveying belt from falling off the belt pulley, and also allowing distance adjustment.

[0037] The first conveying assembly comprises a first belt pulley, a second belt pulley, a third belt pulley, a first conveying belt and a first base, the first belt pulley is arranged on the first base at a front end position, the third belt pulley is located behind the first belt pulley, the second belt pulley is located between the first belt pulley and the third belt pulley, the first conveying belt is sleeved outside the first belt pulley, the second belt pulley and the third belt pulley, and the upper ends of the first belt pulley, the second belt pulley and the third belt pulley are rotationally connected with the lower end surface of the first base.

[0038] The second conveying assembly comprises a fourth belt pulley, a fifth belt pulley, a sixth belt pulley, a second conveying belt and a second base, the fourth belt pulley is arranged on the second base at a front end position, the sixth belt pulley is located behind the fourth belt pulley, the fifth belt pulley is located between the fourth belt pulley and the sixth belt pulley, the second conveying belt is sleeved outside the fourth belt pulley, the fifth belt pulley and the sixth belt pulley, and the upper ends of the fourth belt pulley, the fifth belt pulley and the sixth belt pulley are rotationally connected with the lower end surface of the second base.

[0039] The conveying belt between the first belt pulley and the second belt pulley becomes one inclined surface of the feeding port, the conveying belt between the fourth belt pulley and the fifth belt pulley becomes the other inclined surface of the feeding port, and the first conveying belt between the second belt pulley and the third belt pulley and the second conveying belt between the fifth belt pulley and the sixth belt pulley form the first conveying channel.

[0040] The third conveying assembly comprises an eighth pulley and a third conveying belt, the eighth pulley is arranged at the rear end of the first base, the front end of the third conveying belt is sleeved outside the third pulley, the rear end is sleeved outside the eighth pulley, and the third conveying belt is located above the first conveying belt;

[0041] The fourth conveying assembly comprises a tenth pulley and a fourth conveying belt, the tenth pulley is arranged at the rear end of the second base, the front end of the fourth conveying belt is sleeved outside the sixth pulley, the rear end is sleeved outside the tenth pulley, and the fourth conveying belt is located above the second conveying belt;

[0042] The second conveying channel is formed between the third conveying belt and the fourth conveying belt.

[0043] In the present application, it needs to be explained that the third pulley is a shared pulley of the first conveying assembly and the third conveying assembly, and is also a shared pulley, and the sixth pulley is a shared pulley of the second conveying assembly and the fourth conveying assembly, and is also a shared pulley, that is, the third pulley and the sixth pulley are a group of pulleys shared by the first-level feeding unit and the second-level feeding unit.

[0044] Preferably, the third pulley is located at the front position or the rear position of the side of the sixth pulley, so that the rear part of the first conveying belt and the second conveying belt is staggered, forming a first discharge port connected with the rear end of the first conveying channel;

[0045] The eighth pulley is located at the front position or the rear position of the side of the tenth pulley, so that the rear part of the third conveying belt and the fourth conveying belt is staggered, forming a second discharge port connected with the rear end of the second conveying channel.

[0046] In the present application, the rear ends of the first-level feeding unit and the second-level feeding unit are arranged in a long-short staggered manner, and it needs to be further explained that the staggered arrangement of the rear end of the first-level feeding unit can not be synchronized with the staggered arrangement of the front end of the first-level feeding unit, that is, the staggered arrangement of the rear end of the first-level feeding unit can be the same as the staggered arrangement of the front end of the first-level feeding unit (the front end of one component is relatively in front of the other component, and the rear end of the one component is also relatively in front of the other component), or can be different (the front end of one component is relatively in front of the other component, and the rear end of the one component is relatively in rear of the other component), and since the third pulley and the sixth pulley are shared pulleys, the staggered arrangement of the front end of the second-level feeding unit is synchronized with the staggered arrangement of the rear end of the first-level feeding unit, and it needs to be further emphasized that the staggered arrangement of the rear end of the second-level feeding unit can also be synchronized with the staggered arrangement of the front end of the second-level feeding unit.

[0047] The first conveying channel in the primary feeding unit and the second conveying channel in the corresponding secondary feeding unit are located in the same vertical plane, and the widths of the first conveying channel and the second conveying channel are the same and are not greater than 1 mm.

[0048] Preferably, in the step two), the device adjustment comprises:

[0049] 2.1), adjusting the distance between the primary feeding unit and the secondary feeding unit in the vertical direction;

[0050] 2.2), connecting different volumes of receiving bags at the outlets of the secondary collection chambers and the primary collection chamber according to the requirements;

[0051] 2.3), adjusting the running speed of the collection assemblies in different collection chambers and the air flow in the air duct.

[0052] 5. The tea leaf harvesting and grading method according to claim 4, wherein in the step 2.1), the specific content of adjusting the distance between the primary feeding unit and the secondary feeding unit in the vertical direction comprises:

[0053] 2.1.1), determining the length range of the longer tea leaves and the shorter tea leaves according to the tea leaf harvesting requirements and the actual growth conditions of the tea leaves;

[0054] 2.1.2), selecting the conveying belts with appropriate widths according to the actual use requirements, and determining the distance between the primary feeding unit and the secondary feeding unit;

[0055] 2.1.4), respectively sleeving the conveying belts in 2.2.2) on the pulleys in the primary feeding unit and the secondary feeding unit based on the upper end surface of the cutting assembly.

[0056] Preferably, in the step two, the parameters during the distance adjustment must meet:

[0057] The distance H6 between the protrusions on the pulley in the vertical direction is 4.5-6.5 mm;

[0058] The width H1 of the conveying belt in the primary feeding unit is 10-15 mm;

[0059] The width H5 of the conveying belt in the secondary feeding unit is 10-15 mm;

[0060] The length H7 of the pulley shared by the primary feeding unit and the secondary feeding unit is 40-55 mm, i.e. the length of the third pulley and the sixth pulley.

[0061] The distance between the lower end of the first feeding unit and the upper end surface of the cutting assembly is H3, which is between 8 mm and (H7-H5-H1-2), and the unit is mm, wherein 8 mm is the lowest position, and H7-H5-H1-2 is the highest position.

[0062] When the position of the first feeding unit is fixed, the lower end surface of the second feeding unit is always higher than the upper end surface of the first feeding unit, and the distance between the lower end surface of the second feeding unit and the upper end surface of the cutting assembly is H4, which is adjustable between (H3+H1+2, H7-H5), and the unit is mm, wherein H3+H1+2 is the lowest position, and H7-H5 is the highest position.

[0063] In the present application, the above-mentioned content can be understood as follows: by adjusting the positions of the conveying belts in the first feeding unit and the second feeding unit on the common pulley (the positions of the pulleys of the respective feeding units on the common pulley need to be adjusted synchronously), the two levels of tea picking standards can be adjusted.

[0064] Preferably, the distance H6 between the protrusions on the pulley in the vertical direction is 5 mm, the width H1 of the conveying belt in the first feeding unit is 10 mm, the width H5 of the conveying belt in the second feeding unit is 10 mm, and the length H7 of the common pulley of the first feeding unit and the second feeding unit is 50 mm. The adjustment range of the position of the conveying belt on the first feeding unit is 8-28 mm from the upper surface of the blade in the cutting assembly below, which can be understood as the distance from the cutting position. Similarly, when the position of the conveying belt on the first feeding unit is determined, the position of the conveying belt on the second feeding unit is adjusted between (H3+H1+2, H7-H5), and at the same time, the position of the conveying belt in the first feeding unit is finally ensured to be lower than the position of the conveying belt in the second feeding unit. For example, when the distance H3 between the bottom of the conveying belt in the first feeding unit and the upper surface of the blade in the cutting assembly below is 8 mm, the distance H4 between the position of the conveying belt on the second feeding unit and the upper end surface of the cutting assembly can be adjusted within the range of (20 mm, 40 mm). When the distance H3 between the bottom of the conveying belt in the first feeding unit and the upper surface of the blade in the cutting assembly below is 28 mm, the distance H4 between the position of the conveying belt on the second feeding unit and the upper end surface of the cutting assembly is 40 mm.

[0065] Preferably, the combination of the positions of the conveying belts in the first feeding unit and the second feeding unit is (H3, H4):(8, 33), (13, 43), and (18, 48), wherein all the numbers in the brackets are in mm, and the numbers in the brackets represent the distance between the conveying belt in the feeding unit and the upper surface of the cutting assembly. The first number in the bracket corresponds to the parameter of the first feeding unit, and the second number corresponds to the parameter of the second feeding unit. When the above three preferred combinations are used, the lengths of the two levels of tea shoots that can be collected are shown in the following table.

[0066]

[0067] In the above, the first level corresponds to the tea leaves collected by the first feeding unit, i.e. the tea leaves entering the first collection chamber, and the second level corresponds to the tea leaves collected by the second feeding unit, i.e. the tea leaves entering the second collection chamber.

[0068] In addition, when no grading is required, only the conveying belt in the first feeding unit can be retained, and the adjustment range of the position of the conveying belt in the first feeding unit is 8-38 mm from the bottom of the conveying belt to the upper surface of the lower blade. When the bottom of the conveying belt is 8 mm from the upper surface of the lower blade, the length of the shoot that can be picked is 13-65 mm. When the bottom of the conveying belt is 38 mm from the upper surface of the lower blade, the length of the shoot that can be picked is 45-65 mm, i.e. the shortest shoot that can be picked is adjustable in the range of 13-45 mm.

[0069] Preferably, in step 2.2), the specific content of installing different volume receiving bags is as follows:

[0070] 2.2.1), according to the length range of the longer tea leaves and the shorter tea leaves determined in step 2.1.1), estimate the volume of the different length tea leaves picked within a certain period of time;

[0071] 2.2.3), according to the content in step 2.2.1), determine the volume of the receiving bag installed at the outlet of the second collection chamber and the volume of the receiving bag installed at the outlet of the first collection chamber;

[0072] 2.2.4), the volume of the receiving bag installed at the outlet of the second collection chamber is greater than the volume of the receiving bag installed at the outlet of the first collection chamber.

[0073] Preferably, in step 2.3), the specific content of adjusting the running speed of the collection assembly in different collection chambers includes:

[0074] 2.3.1), obtain the tea variety and the actual growth of the tea leaves; (also including the length of the longer tea leaves and the shorter tea leaves)

[0075] 2.3.2), the distance from the inlet to the corresponding outlet of the second collection chamber and the first collection chamber;

[0076] 2.3.3), referring to the content of step 2.3.1) and the content of step 2.3.2), respectively set the running speed of the collection assembly in different collection chambers and the air power in the air duct.

[0077] Preferably, in step three), the content of tea picking includes:

[0078] 3.1), turn on the tea picking and grading device to pick tea;

[0079] 3.2), the longer tea leaves and the shorter tea leaves are clamped and transported in the first conveying channel by the first feeding unit in a centralized and unified manner;

[0080] 3.3), the cutting assembly cuts all the tea leaves in the first conveying channel;

[0081] 3.4), the first feeding unit transports the tea leaves to the tail end, the shorter tea leaves fall from the tail end of the first feeding unit and enter the first collecting chamber from the entrance of the first collecting chamber, and the second feeding unit clamps the longer tea leaves to move and transport the longer tea leaves in the second conveying channel;

[0082] 3.5), the longer tea leaves fall from the tail end of the second feeding unit and enter the second collecting chamber from the entrance of the second collecting chamber.

[0083] Preferably, the specific content of the step four) includes:

[0084] 4.1), the shorter tea leaves conveyed by the first feeding unit are received by the first collecting chamber, and the longer tea leaves conveyed by the second feeding unit are received by the second collecting chamber;

[0085] 4.2), the shorter tea leaves are transported by the collecting assembly in the first collecting chamber, and the longer tea leaves are transported by the collecting assembly in the second collecting chamber;

[0086] 4.3), the shorter tea leaves are concentrated and introduced into the outlet of the first collecting chamber (31) by the second baffle auxiliary collecting assembly in the first collecting chamber;

[0087] 4.4), the longer tea leaves are concentrated and introduced into the outlet of the second collecting chamber by the first baffle auxiliary collecting assembly in the second collecting chamber;

[0088] 4.5), the tea leaves are sent into the storage bag of each collecting chamber by using the inertia of the tea leaves and the air in the air duct, so as to realize the classified collection.

[0089] Compared with the prior art, the application has the following beneficial effects:

[0090] 1. By arranging two feeding units, the application can classify tea leaves according to the length of different tea leaves when picking tea, and by arranging the conveying belt with mounting holes and the belt pulley with protrusions, the distance between the first feeding unit and the second feeding unit in the vertical direction can be adjusted, the interval between the two can be increased or decreased, and tea leaves of different lengths can be classified, so that the classification standard is adjustable, the device can be applied to tea picking operations of different standards, the subsequent processing of tea leaves is reduced, the process of picking tea and classifying tea is efficiently and conveniently completed, and the application has strong adaptability.

[0091] 2、The application adopts staggered arrangement in the horizontal direction for the outlets of the two collecting chambers, and the two openings have no overlapping part in the vertical direction, so that the receiving bags installed at the two openings do not affect each other during tea harvesting, especially the receiving bag at the upper outlet does not extrude the receiving bag at the lower outlet, and the extrusion force between the two receiving bags increases rapidly with the increase of the tea harvesting amount, which seriously affects the situation that the tea enters the receiving bag, meanwhile, according to the setting of the relevant parameters, the application can ensure that the tea stored in stages does not have serious weight difference between the left and right of the device with the increase of the weight, so as to avoid the device deviation caused by the uneven weight during tea harvesting, improve the fault tolerance, and ensure that the length of the harvested tea is relatively uniform. BRIEF DESCRIPTION OF DRAWINGS

[0092] Figure 1 It is a schematic diagram of the overall structure of the application;

[0093] Figure 2 It is a partial structure bottom view of the application;

[0094] Figure 3 It is a schematic diagram of the partial structure of the rack in the application;

[0095] Figure 4 It is a schematic diagram of the partial structure of the rack in the application;

[0096] Figure 5 It is a schematic diagram of the partial structure of the rack in the application from other angles;

[0097] Figure 6 It is a side view of the partial structure of the first feeding unit and the second feeding unit in the application;

[0098] Figure 7 It is a schematic diagram of the dimensions in example 1 in the application;

[0099] Figure 8 It is a top view of the partial structure of the first feeding unit and the second feeding unit in the application;

[0100] Figure 9 It is a schematic diagram of the partial structure of the first feeding unit in the application;

[0101] Figure 10 It is a schematic diagram of the partial structure of the second feeding unit in the application;

[0102] Figure 11 It is a side view of the partial structure of the first feeding unit and the second feeding unit in example 2 of the application;

[0103] Figure 12 It is a side view of the partial structure of the first feeding unit and the second feeding unit in example 3 of the application;

[0104] In the diagram: First conveying assembly 1, Second conveying assembly 2, First conveying channel 3, Inlet 4, Third conveying assembly 5, Fourth conveying assembly 6, Second conveying channel 7, Frame 8, Protrusion 9, First pulley 10, Second pulley 11, Third pulley 12, First conveyor belt 13, First base 14, Fourth pulley 15, Fifth pulley 16, Sixth pulley 17, Second conveyor belt 18, Second base 19, Eighth pulley 21, Third conveyor belt 22, Tenth pulley 25, Fourth conveyor belt 26, First outlet 28, Second outlet 29, Secondary collection chamber 30, Primary collection chamber 31, Primary feeding unit 32, Secondary feeding unit 33, Cutting assembly 34, First collection assembly 35, Second collection assembly 36, First baffle 37, Second baffle 38, Second outlet 39, First outlet 40, Mounting hole 41. Detailed Implementation

[0105] The following will refer to the appendices in the embodiments of the present invention. Figures 1-9 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0106] In the description of this invention, it should be understood that the terms "first-level," "second-level," "first," and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0107] Please see Figures 1-12 Embodiments of the present invention:

[0108] Example 1:

[0109] like Figures 1-5 As shown: A tea harvesting and grading method with adjustable grading standards, characterized by the following steps:

[0110] (i) Provides a tea harvesting and grading device with adjustable grading standards, the device comprising:

[0111] The frame 8 is provided with a collection chamber, which includes a secondary collection chamber 30 and a primary collection chamber 31. The secondary collection chamber 30 is located above the primary collection chamber 31. The entrance of the primary collection chamber 31 is located horizontally between the front end of the frame 8 and the entrance of the secondary collection chamber 30. The exits of the secondary collection chamber 30 and the exit of the primary collection chamber 31 are staggered and located at the rear end of the frame 8.

[0112] A feeding mechanism is arranged on the frame 8 in front of the collecting chamber, which comprises at least one first feeding unit 32 and one second feeding unit 33, the second feeding unit 33 is arranged at a rear position above the first feeding unit 32, and the two units are one-to-one corresponding, the tail end of the first feeding unit 32 is above the first collecting chamber 31, and the tail end of the second feeding unit 33 is above the second collecting chamber 30, all the feeding units are composed of at least a conveying belt and a plurality of pulleys, a plurality of protrusions 9 are arranged outside the pulleys, a plurality of mounting holes 41 are arranged on the conveying belt, the protrusions 9 can be fitted and mounted with the mounting holes 41, the conveying belt is sleeved outside the plurality of pulleys to form a loop, and the rear end of the first feeding unit 32 and the front end of the second feeding unit 33 share a set of pulleys;

[0113] A collecting unit is arranged in the collecting chamber, which is used for transporting tea leaves in the collecting chamber from the entrance of the collecting chamber to the exit of the collecting chamber;

[0114] A cutting assembly 34 is connected with the frame 8 and arranged at a front position below the first feeding unit 32;

[0115] As shown in Figure 1 、 2 and 7: in step one), the first feeding units 32 and the second feeding units 33 are symmetrically arranged;

[0116] The first feeding unit 32 comprises a first conveying assembly 1 and a second conveying assembly 2, and a first conveying channel 3 is formed between the first conveying assembly 1 and the second conveying assembly 2, and the first conveying channels 3 in each first feeding unit 32 are parallel to each other;

[0117] The second feeding unit 33 comprises a third conveying assembly 5 and a fourth conveying assembly 6, the third conveying assembly 5 is arranged at a rear position above the first conveying assembly 1, and the fourth conveying assembly 6 is arranged at a rear position above the second conveying assembly 2, a second conveying channel 7 is formed between the third conveying assembly 5 and the fourth conveying assembly 6, and the second conveying channels 7 in each second feeding unit 33 are parallel to each other;

[0118] The rear end of the conveying belt in the first conveying assembly 1 and the front end of the conveying belt in the third conveying assembly are sleeved on a common pulley, and the rear end of the conveying belt in the second conveying assembly 2 and the front end of the conveying belt in the fourth conveying assembly are sleeved on another common pulley;

[0119] The feeding mechanism further comprises a plurality of bases connected with the frame 8, the bases are arranged above the pulleys, and the pulleys are rotationally connected with the bases.

[0120] For convenience of representation, the outlet of the secondary collection chamber 30 is referred to as the second outlet 39, the outlet of the primary collection chamber 31 is referred to as the first outlet 40, the collection assembly in the secondary collection chamber 30 is referred to as the collection assembly 35, and the collection assembly in the primary collection chamber 31 is referred to as the second collection assembly 36.

[0121] The collection unit assembly comprises:

[0122] A plurality of air ducts arranged on the frame 8, which assist the tea to move from the inlet of each collection chamber to the outlet of the corresponding collection chamber by sending air into the collection chamber;

[0123] A collection assembly arranged at the bottom of each collection chamber, which is used to transport the tea falling thereon to the outlet of the collection chamber where the collection assembly is arranged;

[0124] The outlet of the secondary collection chamber 30 and the outlet of the primary collection chamber 31 are arranged side by side in the horizontal direction at the rear end of the frame 8.

[0125] As shown in Figures 3-5 The secondary collection chamber 30 is provided with at least one first baffle 37, which is arranged obliquely so that the space in the secondary collection chamber 30 is in a state of shrinkage from the inlet of the secondary collection chamber 30 to the outlet of the secondary collection chamber 30;

[0126] The primary collection chamber 31 is provided with at least one second baffle 38, which is arranged obliquely so that the space in the primary collection chamber 31 is in a state of shrinkage from the inlet of the primary collection chamber 31 to the outlet of the secondary collection chamber 30;

[0127] In the present application, the first baffle 37 and the second baffle 38 can assist and guide the tea in the corresponding collection chamber to move from the outlet of the corresponding collection chamber to the outlet of the corresponding collection chamber.

[0128] As shown in Figures 3-5 The bottom of the primary collection chamber 31 is used as the top of the secondary collection chamber 30, and in the horizontal direction, the position of the top front end of the secondary collection chamber 30 on the whole frame 8 is more rearward relative to the position of the bottom front end of the secondary collection chamber 30 on the whole frame 8, so as to form the inlet of the secondary collection chamber 30.

[0129] As shown in Figure 6 The feeding mechanism is arranged obliquely relative to the collection chambers and the bottom of the frame 8, and the oblique direction of the feeding mechanism extends in a gradually rising trend from the front end to the rear end.

[0130] As Figures 6-10 shown: the first conveying assembly 1 and the second conveying assembly 2 form a first conveying channel 3 and a feeding port 4, the feeding port 4 gradually shrinks from the front end of the feeding unit to the first conveying channel 3, and the feeding port 4 is surrounded by at least two inclined surfaces;

[0131] The tea leaves are collected into the first conveying channel 3 from the feeding port 4, the feeding unit transports the tea leaves by clamping through the first conveying assembly 1 and the second conveying assembly 2, the shorter tea leaves fall from the rear end of the first conveying channel 3 into the first-stage collection chamber 31, and the longer tea leaves are continuously clamped and transported along the second conveying channel 7 into the second-stage collection chamber 30, achieving classification of tea leaves of different lengths.

[0132] In this application, it needs to be further explained that the feeding port 4 is arranged at the front end of the conveying channel, the discharge port is arranged at the rear end of the conveying channel, and the three are sequentially connected, and from the two inclined surfaces in the above, it can be reasonably understood that the two inclined surfaces are located on the first conveying assembly 1 and the second conveying assembly 2, respectively. In addition, the reference standard of front and rear in this application is that the part that contacts the tea leaves first is the front, and the part that contacts the tea leaves last is the rear.

[0133] The outer side wall of the pulley is provided with a plurality of protrusions 9, and the conveying belt is provided with a plurality of mounting holes 41, the protrusions 9 can be installed in the mounting holes 41, preventing the conveying belt from falling off the pulley while also allowing distance adjustment.

[0134] The first conveying assembly 1 comprises a first pulley 10, a second pulley 11, a third pulley 12, a first conveying belt 13, and a first base 14. The first pulley 10 is arranged on the first base 14 at the front end position, the third pulley 12 is located behind the first pulley, the second pulley 11 is located between the first pulley 10 and the third pulley 12, the first conveying belt 13 is sleeved outside the first pulley 10, the second pulley 11, and the third pulley 12, and the upper ends of the first pulley 10, the second pulley 11, and the third pulley 12 are rotationally connected with the lower end surface of the first base 14;

[0135] The second conveying assembly 2 comprises a fourth pulley 15, a fifth pulley 16, a sixth pulley 17, a second conveying belt 18 and a second base 19, the fourth pulley 15 is arranged on the second base 19 at a front end position, the sixth pulley 17 is located behind the fourth pulley 15, the fifth pulley 16 is located between the fourth pulley 15 and the sixth pulley 17, the second conveying belt 18 is sleeved on the fourth pulley 15, the fifth pulley 16 and the sixth pulley 17, and the upper ends of the fourth pulley 15, the fifth pulley 16 and the sixth pulley 17 are rotationally connected with the lower end surface of the second base 19;

[0136] The conveying belt between the first pulley 10 and the second pulley 11 forms an inclined surface surrounding the feeding port 4, the conveying belt between the fourth pulley 15 and the fifth pulley 16 forms another inclined surface surrounding the feeding port 4, and the first conveying belt 13 between the second pulley 11 and the third pulley 12 and the second conveying belt 18 between the fifth pulley 16 and the sixth pulley 17 form the first conveying channel 3, i.e., the second conveying channel 3 is formed between the first conveying belt 13 and the second conveying belt 18.

[0137] The third conveying assembly 5 comprises an eighth pulley 21 and a third conveying belt 22, the eighth pulley 21 is arranged at a rear end position of the first base 14, the front end of the third conveying belt 22 is sleeved on the third pulley 12, the rear end is sleeved on the eighth pulley 21, and the third conveying belt 22 is located above the first conveying belt 13;

[0138] The fourth conveying assembly 6 comprises a tenth pulley 25 and a fourth conveying belt 26, the tenth pulley 25 is arranged at a rear end position of the second base 19, the front end of the fourth conveying belt 26 is sleeved on the sixth pulley 17, the rear end is sleeved on the tenth pulley 25, and the fourth conveying belt 26 is located above the second conveying belt 18;

[0139] The second conveying channel 7 is formed between the third conveying belt and the fourth conveying belt.

[0140] In this application, it needs to be explained that the third pulley 12 is a shared pulley of the first conveying assembly 1 and the third conveying assembly 5, and is also a public pulley, and the sixth pulley 17 is a shared pulley of the second conveying assembly 2 and the fourth conveying assembly 6, and is also a public pulley, that is, the third pulley 12 and the sixth pulley 17 are a set of pulleys shared by the first-level feeding unit 32 and the second-level feeding unit 33.

[0141] As Figure 7As shown: the third pulley 12 is located at the front or rear position of the side of the sixth pulley 17, so that the first conveying belt 13 and the second conveying belt 18 are staggered at the rear, forming a first discharge port 28 connected with the rear end of the first conveying channel 3;

[0142] The eighth pulley 21 is located at the front or rear position of the side of the tenth pulley 25, so that the third belt and the fourth belt are staggered at the rear, forming a second discharge port 29 connected with the rear end of the second conveying channel 7.

[0143] In this application, the rear ends of the feeding unit and the secondary feeding unit 33 are staggered in length, and it needs to be further explained that the staggered setting of the rear end of the feeding unit can not be synchronized with the staggered setting of the front end of the feeding unit, that is, the staggered setting of the rear end of the feeding unit can be the same as the staggered setting of the front end of the feeding unit (the front end of one component is relatively in front of the other component, and the rear end of the one component is also relatively in front of the other component), or it can be different (the front end of one component is relatively in front of the other component, and the rear end of the one component is relatively in the rear of the other component), and since the third pulley 12 and the sixth pulley 17 are shared pulleys, the staggered setting of the front end of the secondary feeding unit 33 is synchronized with the staggered setting of the rear end of the feeding unit, and it needs to be further emphasized that the staggered setting of the rear end of the secondary feeding unit 33 can also be synchronized or different from the staggered setting of the front end of the secondary feeding unit 33.

[0144] The first conveying channel 3 in the feeding unit and the second conveying channel 7 in the corresponding secondary feeding unit 33 are located in the same vertical plane, and the widths of the first conveying channel 3 and the second conveying channel 7 are the same, and the widths are not greater than 1mm.

[0145] In this embodiment, the tea leaves are transported by the primary feeding unit 32, and the secondary feeding unit 33 is arranged above the primary feeding unit 32 at the rear position, so that the longer tea leaves are clamped by the secondary feeding unit 33 before they leave the primary feeding unit 32, and after the longer tea leaves leave the primary feeding unit 32, they are still clamped and transported by the secondary feeding unit 33 and leave from the second discharge port 29 at the rear end of the secondary feeding unit 33, while the shorter tea leaves directly leave from the first discharge port 28 at the rear end of the primary feeding unit 32, realizing the classification of tea leaves according to their length during picking, realizing mechanized picking, avoiding the later screening process, improving the efficiency of tea picking, and using the belts with gaps in the primary feeding unit 32 and the secondary feeding unit 33 to clamp and transport the tea leaves, avoiding damage to the tea leaves, improving the quality of the picked tea leaves, and the first discharge port 28 and the second discharge port 29 formed by the staggered arrangement of the conveying components also facilitate the falling of the tea leaves.

[0146] The outer side wall of the pulley is provided with a plurality of protrusions 9, and a plurality of mounting holes 41 are formed on the conveying belt, and the protrusions 9 can be arranged in the mounting holes 41 to prevent the conveying belt from falling off the pulley.

[0147] In this embodiment, the protrusions 9 and the mounting holes 41 can be understood as the conveying belt being connected with the protrusions 9 through the mounting holes 41, and being firmly sleeved on the pulley. In the vertical direction, the conveying belt and the pulley can be more stable when driving and abutting, and the conveying belt can be prevented from falling off the pulley. In the horizontal direction, the abutting force between the conveying belt and the pulley can be increased, and the stability of the two when driving can be further increased. The protrusions 9 also increase the contact area between the pulley and the conveying belt, and enhance the abutting stability between the pulley and the conveying belt. In addition, the distance between the primary feeding unit 32 and the secondary feeding unit 33 can be adjusted through the connection of the protrusions 9 and the mounting holes 41, and the adaptability is enhanced.

[0148] The front end of the primary feeding unit 32, the rear end of the secondary feeding unit 33, the front end of the secondary feeding unit 33, and the rear end of the secondary feeding unit 33 are synchronously arranged.

[0149] II) Device deployment

[0150] In the step II), the device deployment includes:

[0151] 2.1) Adjust the distance between the primary feeding unit 32 and the secondary feeding unit 33 in the vertical direction;

[0152] 2.1.1) According to the tea picking demand and the actual growth of tea, determine the length range of long tea and short tea;

[0153] 2.1.2) According to the actual use demand, select the conveying belt with appropriate width respectively, and determine the distance between the primary feeding unit 32 and the secondary feeding unit 33;

[0154] 2.1.3) Take the upper end surface of the cutting assembly 34 as the reference, and respectively sleeve the conveying belt in 2.1.2) on the pulley in the primary feeding unit 32 and the secondary feeding unit 33.

[0155] The distance H6 between the plurality of protrusions 9 on the pulley in the vertical direction is 5mm;

[0156] The width H1 of the conveying belt in the primary feeding unit 32 is 15mm;

[0157] The width H5 of the conveying belt in the secondary feeding unit 33 is 5mm;

[0158] The length H7 of the pulley shared by the first feeding unit 32 and the second feeding unit 33 is 45mm; that is, the length of the third pulley 12 and the sixth pulley 17.

[0159] The distance H3 between the lower end of the first feeding unit 32 and the upper end surface of the cutting assembly 34 is 8mm;

[0160] The distance H4 between the lower end surface of the second feeding unit 33 and the upper end surface of the cutting assembly 34 is 33mm.

[0161] At this time, the corresponding picking of the new shoots: the first level: the length is between 13-38mm, the second level: the length is between 38-65mm.

[0162] 2.2) According to the needs, connect different volumes of receiving bags at the outlets of the second collection chamber 30 and the first collection chamber 31;

[0163] 2.2.1) According to the length range of the longer tea leaves and the shorter tea leaves determined in step 2.1.1), estimate the volume of the tea leaves of different lengths picked within a certain period;

[0164] 2.2.2) According to the content in step 2.2.1), determine the volume of the receiving bag installed at the outlet of the second collection chamber 30 and the volume of the receiving bag installed at the outlet of the first collection chamber 31;

[0165] 2.2.4) The volume of the receiving bag installed at the outlet of the second collection chamber 30 is greater than the volume of the receiving bag installed at the outlet of the first collection chamber 31.

[0166] 2.3) Adjust the running speed of the collection assembly in different collection chambers and the wind power in the air duct.

[0167] 2.3.1) Obtain the tea variety and the actual growth of the tea leaves;

[0168] 2.3.2) The distance from the inlet to the corresponding outlet of the second collection chamber 30 and the first collection chamber 31;

[0169] 2.3.3) According to the content in step 2.3.1) and the content in step 2.3.2), respectively set the running speed of the collection assembly in different collection chambers and the wind power in the air duct.

[0170] Three, tea picking

[0171] 3.1) Turn on the tea picking and grading device to pick tea;

[0172] 3.2) The longer tea leaves and the shorter tea leaves are concentrated and uniformly clamped and transported in the first transport channel by the first feeding unit 32;

[0173] 3.3), the cutting assembly 34 cuts all the tea leaves in the first conveying channel 3;

[0174] 3.4), the first feeding unit 32 transports the tea leaves to the tail end, the shorter tea leaves fall from the tail end of the first feeding unit 32, enter the first collecting chamber 31 from the entrance of the first collecting chamber 31, and the second feeding unit 33 clamps the longer tea leaves to move the longer tea leaves in the second conveying channel;

[0175] 3.5), the longer tea leaves fall from the tail end of the second feeding unit 33 and enter the second collecting chamber 30 from the entrance of the second collecting chamber 30.

[0176] Four, grading collection of tea leaves

[0177] 4.1), the first feeding unit 32 transports the shorter tea leaves to the first collecting chamber 31, and the second feeding unit 33 transports the longer tea leaves to the second collecting chamber 30;

[0178] 4.2), the first collecting chamber 31 transports the shorter tea leaves by the collecting assembly, and the second collecting chamber 30 transports the longer tea leaves by the collecting assembly;

[0179] 4.3), the longer tea leaves are concentrated and introduced into the outlet of the second collecting chamber 30 by the first baffle auxiliary collecting assembly in the second collecting chamber 30;

[0180] 4.4), the shorter tea leaves are concentrated and introduced into the outlet of the first collecting chamber 31 by the second baffle auxiliary collecting assembly in the first collecting chamber 31;

[0181] 4.5), the tea leaves are sent into the storage bag of each collecting chamber by the inertia of the tea leaves themselves and the air in the air duct, and grading collection is realized.

[0182] Embodiment 2: The difference between this embodiment and embodiment 1 is that the distance between the first feeding unit 32 and the second feeding unit 33 is different, that is, the adaptively picked tea leaves are also different.

[0183] As shown in the figure, in this embodiment: Figure 11 The distance H3 between the lower end of the first feeding unit 32 and the upper end surface of the cutting assembly 34 is 13 mm;

[0184] The distance H4 between the lower end surface of the second feeding unit 33 and the upper end surface of the cutting assembly 34 is 43 mm.

[0185] At this time, the adaptively picked tea leaves are: first: length between 18-48 mm, second: length between 48-65 mm.

[0186] ​

[0187] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the distance between the first feeding unit 32 and the second feeding unit 33 is different, that is, the adaptively picked tea leaves are also different.

[0188] In this embodiment:

[0189] As shown in Figure 12 : the distance H3 between the lower end of the first feeding unit 32 and the upper end surface of the cutting assembly 34 is 18 mm;

[0190] The distance H4 between the lower end surface of the second feeding unit 33 and the upper end surface of the cutting assembly 34 is 43 mm.

[0191] At this time, the corresponding picked shoots are: first: length between 23-38 mm, second: length between 48-65 mm.

[0192] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in any respect, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0193] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A method of harvesting and grading tea leaves with adjustable grading criteria, characterized in that, Includes the following steps: (i) Provides a tea harvesting and grading device with adjustable grading standards, the device comprising: The frame (8) is provided with a collection chamber, which includes a secondary collection chamber (30) and a primary collection chamber (31). The secondary collection chamber (30) is located above the primary collection chamber (31). The entrance of the primary collection chamber (31) is located horizontally between the front end of the frame (8) and the entrance of the secondary collection chamber (30). The exit of the secondary collection chamber (30) and the exit of the primary collection chamber (31) are staggered and located at the rear end of the frame (8). The feeding mechanism is set on the frame (8) and located in front of the collection chamber. The feeding mechanism includes at least one primary feeding unit (32) and one secondary feeding unit (33). The secondary feeding unit (33) is located above and behind the primary feeding unit (32), and the two correspond one to one. The tail end of the primary feeding unit (32) is located above the primary collection chamber (31), and the tail end of the secondary feeding unit (33) is located above the secondary collection chamber (30). All feeding units are composed of at least a conveyor belt and multiple pulleys. Several protrusions are provided on the outside of the pulleys. Several mounting holes are provided on the conveyor belt. The protrusions can be fitted with the mounting holes for installation. The conveyor belt is sleeved on several pulleys to form a loop. The rear end of the primary feeding unit (32) and the front end of the secondary feeding unit (33) share a set of pulleys. A collection unit, located inside a collection chamber, is used to transport tea leaves from the entrance to the exit of the collection chamber. The cutting assembly (34) is connected to the frame (8) and is located below and in front of the primary feeding unit (32); II) Equipment Adjustment; III. Tea picking; (iv) Grade and collect tea leaves.

2. A method of grading tea leaves according to claim 1, wherein, In step one), the adjacent primary feeding units (32) and the secondary feeding units (33) are symmetrically arranged; The primary feeding unit (32) includes a first conveying component (1) and a second conveying component (2), and a first conveying channel (3) is formed between the first conveying component (1) and the second conveying component (2). The first conveying channels (3) in each primary feeding unit (32) are parallel to each other. The secondary feeding unit (33) includes a third conveying component (5) and a fourth conveying component (6). The third conveying component (5) is located above and behind the first conveying component (1), and the fourth conveying component (6) is located above and behind the second conveying component (4). A second conveying channel (7) is formed between the third conveying component (5) and the fourth conveying component (6). The second conveying channels (7) in each secondary feeding unit (33) are parallel to each other. The rear end of the conveyor belt in the first conveyor assembly (1) and the front end of the conveyor belt in the third conveyor assembly are fitted onto a common pulley, and the rear end of the conveyor belt in the second conveyor assembly (2) and the front end of the conveyor belt in the fourth conveyor assembly are fitted onto another common pulley. The feeding mechanism also includes several bases, which are connected to the frame (8). The bases are located above the pulleys, and the pulleys are rotatably connected to the bases.

3. The tea harvesting and grading method with adjustable grading standards according to claim 2, characterized in that, The collection unit component includes: Several air ducts are set on the frame (8) to assist tea leaves in moving from the entrance of each collection chamber to the corresponding collection chamber exit by supplying air into the collection chamber; A collection component, located at the bottom of each collection chamber, is used to transport tea leaves that fall onto it to the exit of that collection chamber. The outlets of the secondary collection chamber (30) and the primary collection chamber (31) are arranged side by side in the horizontal direction at the rear end of the frame (8).

4. The tea harvesting and grading method with adjustable grading standards according to claim 3, characterized in that, In step two), the device adjustment includes: 2.1) Adjust the vertical distance between the primary feeding unit (32) and the secondary feeding unit (33); 2.2) Connect storage bags of different volumes to the exits of the secondary collection chamber (30) and the primary collection chamber (31) as needed; 2.3) Adjust the operating speed of the collection components in different collection chambers and the air force in the duct.

5. A tea harvesting and grading method with adjustable grading standards according to claim 4, characterized in that, In step 2.1), the specific details of the vertical distance between the primary feeding unit (32) and the secondary feeding unit (33) are as follows. include: 2.1.1) Determine the length range of different grades of tea based on tea picking requirements and actual tea growth conditions; 2.1.2) Select appropriate conveyor belts according to actual usage requirements and determine the distance between the primary feeding unit (32) and the secondary feeding unit (33); 2.1.4) Using the upper end face of the cutting component as a reference, the conveyor belt in 2.2.2) is respectively fitted onto the pulleys in the first-level feeding unit (32) and the second-level feeding unit (33).

6. A tea harvesting and grading method with adjustable grading standards according to claim 5, characterized in that, In step two, the parameters for distance adjustment must meet the following requirements: The vertical distance H6 between the protrusions on the pulley is 5.5-6.5 mm. The width H1 of the conveyor belt in the primary feeding unit (32) is 10-15mm; The width H5 of the conveyor belt in the secondary feeding unit (33) is 10-15mm; The length H7 of the pulley shared by the primary feeding unit (32) and the secondary feeding unit (33) is 40-55mm; The distance H3 between the lower end of the primary feeding unit (32) and the upper end face of the cutting component is (8, H7-H5-H1-2) in mm, where 8 mm is the lowest position and H7-H5-H1-2 is the highest position. Once the position of the primary feeding unit (32) is fixed, the lower end face of the secondary feeding unit (33) is always higher than the upper end face of the primary feeding unit (32), and the distance H4 between it and the upper end face of the cutting component is adjustable between (H3+H1+2, H7-H5), with the unit being mm, where H3+H1+2 is the lowest position and H7-H5 is the highest position.

7. A tea harvesting and grading method with adjustable grading standards according to claim 6, characterized in that, In step 2.2), the specific steps for installing storage bags of different volumes are as follows: 2.2.1) Based on the length range of longer and shorter tea leaves determined in step 2.1.1), estimate the volume of tea leaves of different lengths picked within a certain range; 2.2.3) Determine the volume of the collection bag installed at the outlet of the secondary collection chamber (30) and the volume of the collection bag installed at the outlet of the primary collection chamber (31) according to the contents of step 2.2.1); 2.2.4) The volume of the collection bag installed at the outlet of the secondary collection chamber (30) should be larger than the volume of the collection bag installed at the outlet of the primary collection chamber (31).

8. A tea harvesting and grading method with adjustable grading standards according to claim 7, characterized in that, The specific details of adjusting the operating speed of the collection components in different collection chambers in step 2.3) include: 2.3.1) Obtain information on tea varieties and actual tea growth conditions; 2.3.2) The distance from the entrance to the corresponding exit of the secondary collection chamber (30) and the primary collection chamber (31); 2.3.3) Refer to the content of step 2.3.1) and step 2.3.2) to set the operating speed of the collection components in different collection chambers and the wind force in the air duct.

9. A tea harvesting and grading method with adjustable grading standards according to claim 1, 2, 3, 4, 6, 7 or 8, characterized in that, Step three) includes the following tea picking activities: 3.1) Activate the tea harvesting and grading device to harvest the tea leaves; 3.2) Both longer and shorter tea leaves are transported in a centralized and uniform manner through the primary feeding unit (32) in the first transport channel; 3.3) The cutting component (34) cuts all the tea leaves in the first conveying channel (3); 3.4) The first-level feeding unit (32) transports the tea leaves to the end. The shorter tea leaves fall from the end of the first-level feeding unit (32) and enter the first-level collection chamber (31) through the entrance of the first-level collection chamber (31). The second-level feeding unit (33) holds the longer tea leaves and moves them in the second transport channel. 3.5) Longer tea leaves fall from the tail end of the secondary feeding unit (33) and enter the secondary collection chamber (30) through the entrance of the secondary collection chamber (30).

10. A tea harvesting and grading method with adjustable grading standards according to claim 9, characterized in that, In step four), the specific content of grading and collecting tea leaves includes: 4.1) The shorter tea leaves are collected by the primary collection chamber (31) and the longer tea leaves are collected by the secondary collection chamber (30) and the secondary feeding unit (33). 4.2) Shorter tea leaves are transported through the collection components in the primary collection chamber (31), and longer tea leaves are transported through the collection components in the secondary collection chamber (30); 4.3) The shorter tea leaves are collected and directed to the outlet of the primary collection chamber (31) through the collection components in the primary collection chamber (31); 4.4) The longer tea leaves are collected and directed to the outlet of the secondary collection chamber (30) through the collection components in the secondary collection chamber (30); 4.5) The tea leaves are transported into the collection bags in each collection chamber by the inertia of the tea leaves and the air in the air duct, so as to achieve graded collection.

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