CN111217080A - Tea aroma raising machine with multi-layer conveying belt and control method - Google Patents
Tea aroma raising machine with multi-layer conveying belt and control method Download PDFInfo
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- CN111217080A CN111217080A CN201911248692.0A CN201911248692A CN111217080A CN 111217080 A CN111217080 A CN 111217080A CN 201911248692 A CN201911248692 A CN 201911248692A CN 111217080 A CN111217080 A CN 111217080A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/22—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration comprising a series of co-operating units
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/06—Treating tea before extraction; Preparations produced thereby
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/10—Screens in the form of endless moving bands
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
- B65G21/08—Protective roofs or arch supports therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/02—Devices for feeding articles or materials to conveyors
- B65G47/16—Devices for feeding articles or materials to conveyors for feeding materials in bulk
- B65G47/18—Arrangements or applications of hoppers or chutes
- B65G47/19—Arrangements or applications of hoppers or chutes having means for controlling material flow, e.g. to prevent overloading
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
- B65G69/045—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials with scraping devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0202—Agricultural and processed food products
Abstract
The invention relates to a tea aroma raising machine with a multi-layer conveying belt and a control method. The aroma raising machine comprises a PLC control unit, an automatic tea feeding unit, an aroma raising and baking unit and an automatic tea discharging unit; the automatic tea feeding unit comprises a vertical elevator and an automatic tea weighing device; the aroma-extracting baking unit comprises a transfer conveyer belt, a transverse leaf-homogenizing device, a longitudinal leaf-homogenizing device and a multi-layer conveyer belt baking unit; the transfer conveyer belt is arranged below a discharge port of the automatic tea weighing device and conveys tea to the multi-layer conveyer belt baking unit; the transverse leaf homogenizing device moves along the length direction of the transfer conveying belt to scrape tea leaves on the transfer conveying belt evenly, and the longitudinal leaf homogenizing device moves along the width direction of the transfer conveying belt to scrape tea leaves on the transfer conveying belt evenly; the multi-layer conveying belt baking unit comprises a plurality of layers of conveying belts for conveying tea leaves from top to bottom and heating baking units arranged on two sides of the conveying belts. The invention solves the problem of tea accumulation on the conveyer belt and ensures the uniformity of tea baking.
Description
Technical Field
The invention belongs to the field of tea processing equipment, and particularly relates to a tea aroma raising machine with a multi-layer conveying belt and a control method.
Background
Baking is an important process for making various kinds of tea, has close relation with the quality of tea making, and is one of very important links in the tea processing process. The tea aroma raising machine is a main device for baking and aroma raising of tea and is used for drying tea to evaporate redundant water in the tea, and meanwhile, the tea aroma raising machine promotes the conversion of substances contained in the tea to solidify the quality of the tea. From the different differentiation of the structure of baking, the tea fragrance enhancing machine mainly has three kinds: drum type, multi-layer drawer type and conveyer belt type tea fragrance extracting machine. Most of the existing tea aroma raising machines in the market adopt a drum-type structure, and a tea turning effect is generated when a drum rotates, so that the tea is favorably and uniformly baked, but the tea is easy to break, tea dust and broken tea are generated, and the tea dust and the broken tea cannot be timely cleared out and are easily burnt to generate burnt flavor, so that the baking quality of the tea is influenced; the multilayer drawer type tea aroma raising machine is used for quantitatively weighing tea leaves and feeding and discharging tea leaves, manual assistance is needed for finishing, the labor intensity of workers is increased, the tea leaf production efficiency is reduced, and continuous production of the tea leaves is not facilitated. The conveyor belt type tea aroma raising machine can not solve the problem that tea is accumulated at the center of the conveyor belt in a large amount in the tea baking process, most of baking areas on the conveyor belt are not fully utilized, tea is excessively accumulated at the center of the conveyor belt, so that the tea air permeability is poor, the high-temperature and high-humidity tea stacking environment is not beneficial to ensuring the tea quality, and the tea quality of the same batch is still uneven. In addition, the problem of the even feed of tealeaves can't be solved to current conveyer belt formula tealeaves fragrance enhancing machine, and tealeaves can't realize the ration feed before getting into the curer to the tealeaves quality on every layer of conveyer belt is inconsistent, has influenced the quality that whole tealeaves cures to a certain extent.
Disclosure of Invention
In order to solve the technical problem, the invention provides a tea aroma raising machine with a multi-layer conveying belt and a control method.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a tea aroma raising machine with a multi-layer conveying belt comprises a PLC control unit, an automatic tea feeding unit, an aroma raising and baking unit and an automatic tea discharging unit;
the automatic tea feeding unit comprises a vertical elevator and an automatic tea weighing device positioned at a discharge port of the vertical elevator; the automatic tea discharging unit comprises a horizontal conveyor for conveying the discharged materials of the aroma raising baking unit;
the aroma-extracting baking unit comprises a transfer conveyer belt, a transverse leaf-homogenizing device, a longitudinal leaf-homogenizing device and a multi-layer conveyer belt baking unit; the transfer conveyer belt is arranged below a discharge port of the automatic tea weighing device and conveys tea to the multi-layer conveyer belt baking unit;
the transverse leaf homogenizing device is arranged above the transfer conveying belt and moves along the length direction of the transfer conveying belt to scrape tea leaves on the transfer conveying belt evenly, and the longitudinal leaf homogenizing device is arranged above the transfer conveying belt and moves along the width direction of the transfer conveying belt to scrape tea leaves on the transfer conveying belt evenly;
the multilayer conveyer belt cures the unit and includes that multilayer staggered arrangement and top-down carry the conveyer belt of tealeaves and install the unit is cured in the heating of conveyer belt both sides, and the opposite direction of operation of adjacent conveyer belt sets up.
The further technical scheme is as follows: the multi-layer conveying belt baking unit comprises a first conveying belt, a second conveying belt, a third conveying belt and a fourth conveying belt which are arranged from top to bottom and are made of stainless steel materials, wherein the first conveying belt, the second conveying belt, the third conveying belt and the fourth conveying belt are arranged in a staggered mode, and screen holes are respectively distributed on the belt surfaces of the first conveying belt, the second conveying belt, the third conveying belt and the fourth conveying belt; the heating baking unit comprises a first electric heating device, a second electric heating device, a third electric heating device and a fourth electric heating device;
the first electric heating device comprises far infrared electric heating plates which are arranged on heat-insulating cover plates on two sides of the first conveying belt and are arranged at intervals along the length direction of the first conveying belt;
the second electric heating device comprises far infrared electric heating plates which are arranged on the heat-insulating cover plates on the two sides of the second conveying belt and are arranged at intervals along the length direction of the second conveying belt;
the third electric heating device comprises far infrared electric heating plates which are arranged on the heat-insulating cover plates on the two sides of the third conveying belt and are arranged at intervals along the length direction of the third conveying belt;
the fourth electric heating device comprises far infrared electric heating plates which are arranged on heat-insulating cover plates on two sides of the fourth conveying belt and are arranged at intervals along the length direction of the fourth conveying belt.
The further technical scheme is as follows: the transverse leaf homogenizing device comprises a first stepping motor, a first stepping motor ball screw, an optical axis, a transverse moving scraper and a transverse rubber plate;
the first stepping motor ball screw is arranged on one side of the transfer conveyer belt, the optical axis is arranged on the other side of the transfer conveyer belt, and the length directions of the first stepping motor ball screw, the optical axis and the transfer conveyer belt are parallel; one end of the transverse moving scraper is mounted with a screw nut on a ball screw of a first stepping motor through a scraper fixing seat, the other end of the transverse moving scraper is mounted with an optical axis nut on an optical axis through a scraper fixing seat, and the transverse rubber plate is mounted in a U-shaped groove below the transverse moving scraper; the first stepping motor is in driving connection with the ball screw of the first stepping motor, so that the screw nut reciprocates along the ball screw of the first stepping motor and drives the transverse moving scraper and the transverse rubber plate to move along the length direction of the transfer conveyer belt to scrape tea leaves evenly.
The further technical scheme is as follows: the longitudinal leaf homogenizing device comprises a second stepping motor, a ball screw of the second stepping motor, a longitudinal ball screw, a bevel gear shaft sleeve, a longitudinal moving scraper and a longitudinal rubber plate;
the second stepping motor ball screw is arranged at one end of the transfer conveyer belt, the longitudinal ball screw is arranged at the other end of the transfer conveyer belt, and the axial directions of the second stepping motor ball screw and the longitudinal ball screw are perpendicular to the length direction of the transfer conveyer belt; one end of the longitudinal moving scraper is mounted with a screw nut on a ball screw of a second stepping motor through a scraper fixing seat, the other end of the longitudinal moving scraper is mounted with a screw nut on a longitudinal ball screw through a scraper fixing seat, and the longitudinal rubber plate is mounted in a U-shaped groove below the longitudinal moving scraper; a first bevel gear is coaxially installed on the ball screw of the second stepping motor, a fourth bevel gear is coaxially installed on the longitudinal ball screw, a first bevel gear shaft is installed at one end of a shaft sleeve of the bevel gear, a second bevel gear shaft is installed at the other end of the shaft sleeve of the bevel gear, a second bevel gear meshed with the first bevel gear is installed on the first bevel gear shaft, and a third bevel gear meshed with the fourth bevel gear is installed on the second bevel gear shaft; the second stepping motor is in driving connection with a ball screw of the second stepping motor so as to realize reciprocating movement of the ball screw of the second stepping motor and a screw nut on the longitudinal ball screw and drive the longitudinal moving scraper and the longitudinal rubber plate to move along the width direction of the transfer conveyer belt so as to scrape tea leaves evenly.
The further technical scheme is as follows: the automatic tea weighing device comprises a weighing bottom plate, a compression spring and a weighing hopper which is supported and installed on the weighing bottom plate through the compression spring, wherein a strain gauge for sensing the deformation of the weighing bottom plate and measuring the weight of tea in the weighing hopper is installed on the weighing bottom plate; a weighing hopper cylinder and a weighing hopper electromagnetic valve for controlling whether a piston rod in the weighing hopper cylinder acts or not are arranged on the weighing hopper, a split discharging door is arranged at an outlet at the bottom of the weighing hopper, and the piston rod in the weighing hopper cylinder is connected with the split discharging door through a discharging door connecting rod; the piston rod of the weighing hopper cylinder conducts telescopic action and drives the oppositely-opened discharging door to move through the discharging door connecting rod so as to open the outlet of the weighing hopper or close the outlet of the weighing hopper.
The further technical scheme is as follows: the first conveying belt, the second conveying belt, the third conveying belt and the fourth conveying belt have the same running speed, and a tea discharging hopper for discharging tea leaves onto the horizontal conveyor is arranged at the discharging position of the fourth conveying belt.
The further technical scheme is as follows: the heat-insulating cover plate is a double-layer heat-insulating cover plate filled with asbestos in the middle.
The further technical scheme is as follows: the bottom of the screw nut is provided with a sliding groove matched with a sliding rail on the first stepping motor ball screw fixing seat, and the bottom of the optical axis nut is provided with a sliding groove matched with a sliding rail on the optical axis fixing seat.
The further technical scheme is as follows: when the longitudinal leaf homogenizing device is at the initial position, the longitudinal moving scraper and the longitudinal rubber plate are positioned outside the side edge of the transfer conveyer belt, and when the transverse leaf homogenizing device is at the initial position, the transverse moving scraper and the transverse rubber plate are positioned outside the end part of the transfer conveyer belt; the horizontal rubber plate and the vertical rubber plate are provided with sawteeth for scraping tea leaves evenly.
The invention also aims to provide a control method of the multilayer conveyor belt tea aroma raising machine, which comprises a feeding control process, an aroma raising baking control process and a discharging control process;
the feeding control process comprises the following steps:
step A1, starting a vertical elevator by the PLC control unit to feed, and controlling the vertical elevator to stop feeding when the tea amount in a weighing hopper of the automatic tea weighing device reaches a set weight; then when no tea leaves exist on the transfer conveyor belt, the PLC control unit controls the split discharge door of the automatic tea leaf weighing device to open and puts the tea leaves on the transfer conveyor belt;
step A2, after the weighing hopper of the automatic tea weighing device finishes feeding, the PLC controls the opposite-open discharge door of the automatic tea weighing device to be closed;
step A3, repeating the steps A1-A2;
the baking control process is as follows:
step B1, after the tea leaves are thrown onto the transfer conveyer belt, the transverse leaf homogenizing device located right above the transfer conveyer belt starts to work, the PLC control unit controls the starting of the first stepping motor to drive the transverse moving scraper to move along the ball screw of the first stepping motor, and the tea leaves are uniformly spread along the length direction of the transfer conveyer belt;
step B2, after the transverse moving scraper finishes the tiling work and returns to the initial position, the PLC control unit controls the first stepping motor to stop working, at this time, the longitudinal leaf homogenizing device positioned right above the transfer conveyer belt starts working, the PLC control unit controls the second stepping motor to start, the longitudinal moving scraper is driven to move along the ball screw of the second stepping motor, and the tea leaves are uniformly tiled along the width direction of the transfer conveyer belt;
step B3, after the longitudinal moving scraper finishes the tiling work and returns to the initial position, the PLC control unit controls a second stepping motor to stop working;
step B4, if the tea leaves on the transfer conveyer belt can not meet the uniform spreading requirement, repeating the steps B1-B3 until the tea leaves are uniformly spread;
step B5, when the tea leaves on the transfer conveyer belt are all tiled, the longitudinal leaf homogenizing device and the transverse leaf homogenizing device are both located at the initial positions, and meanwhile, no tea leaves exist on the first conveyer belt, the PLC control unit controls the transfer conveyer belt and the first conveyer belt to run at the same linear speed and in opposite running directions;
step B6, when all the tea leaves on the transfer conveyor belt are transferred onto the first conveyor belt, the PLC control unit controls the first conveyor belt to stop running; then the PLC control unit controls the first electric heating device to start, and the tea leaves spread on the first conveyor belt enter the baking process;
step B7, when the tea leaves on the first conveying belt reach the set baking time and no tea leaves exist on the second conveying belt, the PLC control unit controls the second conveying belt and the first conveying belt to run at the same linear speed and in opposite running directions;
step B8, when all the tea leaves on the first conveying belt are conveyed to the second conveying belt, the PLC control unit controls the second conveying belt to stop running; then the PLC control unit controls the second electric heating device to start, and the tea leaves spread on the second conveyor belt enter the baking process;
step B9, when the tea leaves on the second conveying belt reach the set baking time and no tea leaves exist on the third conveying belt, the PLC control unit controls the third conveying belt and the second conveying belt to run at the same linear speed and in opposite running directions;
step B10, when all the tea leaves on the second conveying belt are conveyed to the third conveying belt, the PLC control unit controls the third conveying belt to stop running; then the PLC control unit controls a third electric heating device to start, and the tea leaves spread on a third conveyor belt enter a baking process;
step B11, when the tea leaves on the third conveying belt reach the set baking time and no tea leaves exist on the fourth conveying belt, the PLC control unit controls the fourth conveying belt and the third conveying belt to run at the same linear speed and in opposite running directions;
step B12, when all the tea leaves on the third conveying belt are conveyed to the fourth conveying belt, the PLC control unit controls the fourth conveying belt to stop running; then the PLC control unit controls the fourth electric heating device to start, and the tea leaves spread on the fourth conveyor belt enter the baking process;
step B13, when the tea leaves on the fourth conveyer belt reach the set baking time, the PLC control unit controls the fourth conveyer belt to run, and the baked tea leaves are conveyed to a horizontal conveyor of the automatic tea leaf discharging unit from the tea discharging hopper;
step B14, repeating the steps B1-B13;
the discharging control process is as follows:
step C1, the PLC control unit controls the operation of the horizontal conveyor and conveys the baked tea leaves to the next working link;
and C2, repeating the step C1.
The invention has the beneficial effects that:
(1) according to the tea aroma raising machine with the multi-layer conveying belt and the control method, the problem that tea leaves are stacked on the conveying belt is solved, so that most of the area of the conveying belt can be fully utilized, the tea leaves are uniformly spread on the conveying belt, and the baking uniformity of the tea leaves is guaranteed. However, in the conventional conveyor type baking machine, tea leaves are generally accumulated in the central area of the conveyor belt, most of the area of the conveyor belt cannot be fully utilized, and the tea leaves cannot be uniformly spread on the conveyor belt.
(2) The tea leaf baking machine ensures that each layer of conveying belt has tea leaves with the same quality through quantitative feeding, namely the feeding and discharging of the tea leaves are all quantitative, the weight is constant, all the advantages of the manual drawer type baking machine are achieved, the baking uniformity of each layer of tea leaves is realized, the quality consistency of the tea leaves in the same batch is ensured, the tea leaf aroma improving efficiency and the tea leaf baking quality are improved, the tea leaf baking machine is fully automatically controlled, and manual assistance is not needed.
(2) The far infrared electric heating plates for heating are arranged on two sides of each layer of conveying belt, the arrangement mode has the characteristics of strong penetrating power and uniform tea baking, tea on each layer of conveying belt can be guaranteed to obtain the same heating effect, and the tea baking quality is consistent.
(3) The tea leaf aroma raising machine with the multi-layer conveying belt adopts a conveying belt baking mode, and has the characteristics of small vibration and noise and difficulty in accumulation in the tea leaf baking process compared with a drum type aroma raising machine; the conveyer belt is high-quality stainless steel, compares with the conveyer belt of rubber material, has the advantage that is difficult for producing and warp and skid, has guaranteed the motion stability of tealeaves in transportation process, is favorable to improving and cures the quality. In addition, the first conveying belt, the second conveying belt, the third conveying belt and the fourth conveying belt are provided with the sieve holes, so that hot air circulation of tea leaves at the bottom of the conveying belts can be accelerated, moisture generated by the tea leaves at the bottom of the conveying belts is evaporated quickly, water stuffiness of the tea leaves is prevented, and the tea leaf baking quality is improved.
(4) The leaf homogenizing device adopts the stepping motor to drive the transverse or longitudinal rubber plate with the saw-tooth shape to reciprocate, so that the tea leaves are flatly paved on the transfer conveyor belt on the premise of not damaging the tea. The problem of present tealeaves concentrate pile up at conveyer belt central authorities is solved, the area of putting in a stall of conveyer belt has been improved for tealeaves is evenly paved on the conveyer belt, has improved and has baked quality and production efficiency. The transverse leaf homogenizing device and the longitudinal leaf homogenizing device are simple in structure and stable in operation.
(5) The tea aroma raising machine adopts the double-layer heat-preservation cover plate filled with heat-preservation asbestos, ensures the maximum utilization of heat in the baking process, avoids excessive heat dissipation and improves the baking efficiency of tea.
(6) According to the tea leaf aroma raising machine, the transmission parts of the tea leaf aroma raising machine are directly connected by adopting the variable-frequency speed reducing motor and are positioned outside the tea leaf aroma raising machine, no transmission part is arranged inside the tea leaf aroma raising machine, and the problem that substances such as lubricating oil in the transmission parts cause secondary pollution to tea leaves in the baking process and influence the baking quality of the tea leaves is avoided.
(7) The control method realizes continuous aroma-improving operation from the perspective of the whole tea-making process, and improves the production efficiency of tea-making by baking while conveying tea leaves.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a structural diagram of an automatic tea weighing device according to the present invention;
FIG. 3 is a structural diagram of the vertical hoist of the present invention;
FIG. 4 is a view showing the construction of a horizontal conveyor in the present invention;
FIG. 5 is the whole structure of the multi-layer conveyor belt tea aroma raising machine of the present invention;
FIG. 6 is a schematic view of a part of the structure of the multi-layer conveyor belt tea aroma raising machine according to the present invention (with part of the heat-insulating cover plate removed);
FIG. 7 is an enlarged view of a partial structure of a multi-layer conveyor belt tea aroma raising machine according to the present invention;
FIG. 8 is a partial structure view of a leaf homogenizing device according to the present invention;
FIG. 9 is a view showing the structure of the far infrared electric heating plate according to the present invention;
FIG. 10 is a transmission structure diagram of the longitudinal leaf homogenizing device in the present invention.
The designations in the drawings have the following meanings:
110-vertical elevator; 111-vertical elevator motor; 112-discharge hole of vertical elevator;
120-automatic tea weighing device; 121-weighing hopper; 122-split discharge doors; 123-weighing hopper cylinder; 124-discharge door connecting rod; 125-weighing hopper solenoid valve; 126-compression spring; 127-strain gage; 128-weighing the bottom plate; 129-automatic tea weighing device rack;
210-aroma raising baking unit; 211-conveyor belt motor; 212-motor holder; 213-a first stepper motor; 214-first stepper motor holder; 215-a second stepper motor; 216-second step motor fixing seat; 217-a transfer conveyor belt; 218-a transfer conveyor side plate; 219 — a first conveyor belt; 220-a second conveyor belt; 221-a third conveyor belt; 222-a fourth conveyor belt; 223-heat preservation cover plate; 224-a tea outlet hopper; 225-a bearing seat; 226-a rack; 227-transversely moving the squeegee; 228-squeegee mount; 229-a first stepper motor ball screw; 230-ball screw fixing seat; 231-the optical axis; 232-optical axis fixing seat; 233-optical axis nut; 234-feed screw nut; 235-transverse rubber plates; 236-bevel gear shaft sleeve; 237-sleeve holder; 238-a first conical gear; 239-a second conical gear; 240-third conical gear; 241-a fourth conical gear; 242-a first bevel gear shaft; 243-second bevel gear shaft; 244-longitudinally moving the squeegee; 245-a second stepper motor ball screw; 246-longitudinal ball screw; 247-longitudinal rubber plates; 248-a first electric heating device; 249-second electric heating means; 250-a third electric heating device; 251-a fourth electric heating device; 252-a far infrared electric heating plate; 253-observation doors;
310-a horizontal conveyor; 311-horizontal conveyor motor; 312-horizontal conveyor belt.
Detailed Description
The technical scheme of the invention is more specifically explained by combining the following embodiments:
as shown in fig. 1: the utility model provides a fragrant machine is carried to multilayer conveyer belt tealeaves, includes PLC the control unit, tealeaves automatic feed unit, carries fragrant baking unit and tealeaves automatic discharging unit.
The automatic tea feeding unit comprises a vertical elevator 110 for conveying tea and an automatic tea weighing device 120, wherein the automatic tea weighing device 120 is arranged right below a discharge port 112 of the vertical elevator and used for accurately feeding the tea; the automatic tea discharging unit comprises a horizontal conveyor 310 for conveying the discharged materials of the aroma raising baking unit;
the aroma raising and baking unit 210 comprises a transfer conveyer belt 217, a transverse leaf homogenizing device, a longitudinal leaf homogenizing device and a multi-layer conveyer belt baking unit; the transfer conveyer belt conveyor 217 is arranged below the discharge port of the tea automatic weighing device 120 and conveys tea to the multi-layer conveyer belt baking unit;
the transverse leaf homogenizing device is arranged above the transferring conveyer belt 217 and moves along the length direction of the transferring conveyer belt 217 to scrape tea leaves on the transferring conveyer belt evenly, and the longitudinal leaf homogenizing device is arranged above the transferring conveyer belt 217 and moves along the width direction of the transferring conveyer belt 217 to scrape tea leaves on the transferring conveyer belt evenly;
the multilayer conveyer belt cures the unit and includes that multilayer staggered arrangement and top-down carry the conveyer belt of tealeaves and install the unit is cured in the heating of conveyer belt both sides, and the opposite direction of operation of adjacent conveyer belt sets up.
Tealeaves automatic weighing device discharge gate is located and carries fragrant the transportation conveyer belt 217 that cures the unit directly over and be 85mm with horizontal even leaf device distance. The discharge of the upper conveying belt in the aroma raising and baking unit 210 falls on the lower conveying belt, the running directions of the upper conveying belt and the lower conveying belt are opposite, the upper conveying belt and the lower conveying belt run at the same linear speed, the upper conveying belt and the lower conveying belt in the aroma raising and baking unit 210 are arranged in a staggered mode, and the staggered distance is 90 mm.
As shown in fig. 2, 3 and 4: the motor of the vertical elevator 110 is an asynchronous alternating current speed reducing motor with the rated power of 0.55 kW; the motor of the horizontal conveyor 310 is an asynchronous alternating-current speed reducing motor with the rated power of 0.37 kW; the conveyor belt motor 211 in the aroma raising baking unit 210 is a speed reducing motor with a frequency converter, and the rated power of the speed reducing motor is 0.4 kW.
As shown in fig. 5 and 6: the aroma raising and baking unit 210 comprises a conveyor belt motor 211, a motor fixing seat 212, a transverse leaf homogenizing device, a longitudinal leaf homogenizing device, a transfer conveyor belt 217, a transfer conveyor belt side plate 218, a first conveyor belt 219, a second conveyor belt 220, a third conveyor belt 221, a fourth conveyor belt 222, a heat-preserving cover plate 223, a tea discharging hopper 224, a bearing seat 225, a rack 226, a first electric heating device 248, a second electric heating device 249, a third electric heating device 250 and a fourth electric heating device 251. The first conveyor belt 219, the second conveyor belt 220, the third conveyor belt 221, and the fourth conveyor belt 222 are disposed from top to bottom and are made of stainless steel.
As shown in fig. 5, 6 and 9: the heating baking unit in the invention is composed of a first electric heating device 248, a second electric heating device 249, a third electric heating device 250 and a fourth electric heating device 251 which are positioned at two sides of the length direction of the conveying belt; the first electric heating devices 248 are arranged and installed on two sides of the first conveying belt 219, the second electric heating devices 250 are arranged and installed on two sides of the second conveying belt 220, the third electric heating devices 252 are arranged and installed on two sides of the third conveying belt 220, and the fourth electric heating devices 253 are arranged and installed on two sides of the fourth conveying belt 221. The electric heating device consists of a plurality of far infrared electric heating plates 252, the far infrared electric heating plates 252 are fixedly arranged on the heat-insulating cover plates 222 at two sides of the conveying belt through elastic clips (not shown in the figure), are symmetrically arranged left and right by taking the conveying belt as the center, and are arranged at intervals of two adjacent far infrared electric heating plates 252, and the distance is 250 mm; each of the far infrared electric heating plates 252 has a size of 150 x 150mm, the number of each layer is 10 and electric heating power of each of the far infrared electric heating plates 252 is 0.2 kW.
As shown in fig. 5, 7 and 8: a transverse leaf homogenizing device and a longitudinal leaf homogenizing device for uniformly flattening tea are arranged above the transferring conveyer belt 217.
The transverse leaf homogenizing device comprises a first stepping motor 213, a first stepping motor base 214, a transverse moving scraper 227, a scraper mounting base 228, a first stepping motor ball screw 229, a ball screw fixing base 230, an optical axis 231, an optical axis fixing base 232, an optical axis nut 233, a screw nut 234 and a transverse rubber plate 235. The first stepping motor 213 in the transverse leaf homogenizing device is fixedly arranged on the frame through a first stepping motor base 214, one end of the transverse moving scraper 227 is fixedly arranged on the screw rod nut 234 through a scraper mounting base 228, the other end of the transverse moving scraper 227 is arranged on the optical axis nut 233 through a scraper fixing base 228, and the transverse rubber plate 235 is fixedly arranged in a U-shaped groove at the bottom of the transverse moving scraper 227 through a bolt. The screw nut 234 and the optical axis nut 233 are coaxially mounted with the first stepping motor ball screw 229 and the optical axis 231 through screw thread matching respectively, the first stepping motor ball screw 229 is fixedly mounted on the ball screw fixing seat 230 through a bearing, the ball screw fixing seat 230 is fixedly mounted on the frame 226, the optical axis 231 is fixedly mounted on the optical axis fixing seat 232 through a bearing, and the optical axis fixing seat 232 is fixedly mounted on the frame 226.
The longitudinal leaf homogenizing device comprises a second stepping motor 215, a second stepping motor base 216, a gear shaft sleeve 236, a sleeve fixing base 237, a first bevel gear 238, a second bevel gear 239, a third bevel gear 240, a fourth bevel gear 241, a first bevel gear shaft 242, a second bevel gear shaft 243, a longitudinal moving scraper 244, a scraper mounting base 228, a second stepping motor ball screw 245, a longitudinal ball screw 246, a ball screw fixing base 230, a screw nut 234 and a longitudinal rubber plate 247. The second stepping motor 215 is fixedly mounted on the frame 226 through a second stepping motor base 216, both ends of the longitudinal moving scraper 244 are fixed on the feed screw nut 234 through a scraper mounting base 228, and the longitudinal rubber plate 247 is fixedly mounted in a U-shaped groove at the bottom of the longitudinal moving scraper 244 through a bolt. The lead screw nut 234 is coaxially installed with the second stepping motor ball screw 245 and the longitudinal ball screw 246 through screw-thread fit, respectively, and the ball screw is fixedly installed on the ball screw fixing base 230 through a bearing. A first conical gear 238 is coaxially installed at one end of the second stepping motor ball screw 245 close to the second stepping motor 215, a second conical gear 239 is coaxially installed on the first conical gear shaft 242, the first conical gear 238 is meshed with the second conical gear 239, and the first conical gear shaft 242 is coaxially installed with the left end of the gear shaft sleeve 236 through a spline. A fourth bevel gear 241 is coaxially installed at one end of the longitudinal ball screw 246, a third bevel gear 240 is coaxially installed on the second bevel gear shaft 243, the third bevel gear 240 is meshed with the fourth bevel gear 241, the second bevel gear shaft 243 is coaxially installed at the right end of the bevel gear shaft sleeve 236 through a spline, and the bevel gear shaft sleeve 236 is installed on the frame 226 through a sleeve fixing seat 237.
As shown in fig. 7 and 8: the working process of flattening the tea leaves by the transverse leaf homogenizing device and the longitudinal leaf homogenizing device is as follows: when having tea on the transportation conveyer belt 217, the even leaf device of PLC the horizontal control unit control starts, lateral shifting scraper blade 227 will be transported tealeaves on the conveyer belt and evenly spread along conveyer belt length direction, work as the motion stop after lateral shifting scraper blade 227 reachs the initial position, the even leaf device of PLC the control unit control starts, the even spreading of tealeaves along conveyer belt width direction on the conveyer belt will be transported to longitudinal shifting scraper blade 244, work as motion stop after longitudinal shifting scraper blade 244 reachs the initial position.
Horizontal even leaf device and vertical even leaf device equipartition are arranged in and are transported conveyer belt 217 top, and vertical even leaf device arranges between horizontal even leaf device and transport conveyer belt 217, the tealeaves after even leaf device shakeouts is 50mm in the thickness of laying on transporting the conveyer belt.
The first stepping motor 213 and the second stepping motor 215 in the leaf homogenizing device are both two-phase 57 stepping motors, the rated current is 2A, the maximum speed is 250mm/s, and the maximum load is 20 Kg. The effective stroke of the ball screw of the first stepping motor is 2000mm, and the effective stroke of the ball screw of the second stepping motor is 600 mm; the ball screw of the stepping motor is made of 6061 aluminum alloy, the model number of the ball screw is G1610, the diameter of the ball screw is 16mm, the lead of the ball screw is 10mm, and the precision grade of the screw is C7.
As shown in fig. 2: the automatic tea weighing device comprises a weighing bottom plate 128, a compression spring 126 and a weighing hopper 121 supported and installed on the weighing bottom plate 128 through the compression spring 126, wherein the weighing bottom plate 128 is provided with a strain gauge 127 for sensing the deformation of the weighing bottom plate 128 and measuring the weight of tea in the weighing hopper 121, the tea is conveyed into the weighing hopper 121 through a vertical elevator 110, along with the continuous increase of the weight of the tea in the weighing hopper 121, the compression spring 126 is compressed to cause the weighing bottom plate 128 to elastically deform under the action of the gravity of the weighing hopper 121, so that the strain gauge 127 installed on the weighing bottom plate 128 also deforms correspondingly, the strain gauge 127 is used as a pressure sensor, the resistance of the strain gauge is changed, the change is converted into an electric signal through a measuring circuit, and the mass of all the tea is measured. The weighing hopper cylinder 123 is connected to an air compressor (not shown) via a hose (not shown).
A weighing hopper cylinder 123 and a weighing hopper electromagnetic valve 125 for controlling whether a piston rod in the weighing hopper cylinder 123 acts or not are arranged on the weighing hopper 121, a split discharging door 122 is arranged at an outlet at the bottom of the weighing hopper 121, and the piston rod in the weighing hopper cylinder 123 is connected with the split discharging door 122 through a discharging door connecting rod 124; the piston rod of the weighing hopper cylinder 123 performs telescopic action and drives the split discharging door 122 to move through the discharging door connecting rod 124 so as to open the outlet of the weighing hopper 121 or close the outlet of the weighing hopper 121.
The control method of the tea aroma raising machine with the multi-layer conveying belt comprises a feeding control process, an aroma raising baking control process and a discharging control process;
the feeding control process comprises the following steps:
step A1, the PLC control unit starts the vertical elevator 110 to feed, and when the tea amount in the weighing hopper of the automatic tea weighing device 120 reaches a set weight, the PLC control unit controls the vertical elevator 110 to stop feeding; then, when no tea leaves exist on the transfer conveyer belt 217, the PLC control unit controls the split discharge door of the automatic tea leaf weighing device 120 to open and throw the tea leaves onto the transfer conveyer belt 217;
step A2, after the weighing hopper of the automatic tea weighing device 120 finishes feeding, the PLC controls the opposite-open discharge door of the automatic tea weighing device 120 to be closed;
step A3, repeating the steps A1-A2;
the baking control process is as follows:
step B1, after the tea leaves are thrown onto the transfer conveyer belt 217, the transverse leaf homogenizing device located right above the transfer conveyer belt 217 starts to work, the PLC control unit controls the starting of the first stepping motor 213 to drive the transverse moving scraper 227 to move along the ball screw 229 of the first stepping motor, and the tea leaves are uniformly spread along the length direction of the transfer conveyer belt 217;
step B2, after the transverse moving scraper 227 finishes the tiling work and returns to the initial position, the PLC control unit controls the first stepping motor 213 to stop working, at this time, the longitudinal leaf homogenizing device positioned right above the transferring conveyor belt 217 starts working, the PLC control unit controls the second stepping motor 215 to start, the longitudinal moving scraper 244 is driven to move along the second stepping motor ball screw 245, and the tea leaves are uniformly tiled along the width direction of the transferring conveyor belt 217;
step B3, after the longitudinal moving scraper 244 finishes the tiling work and returns to the initial position, the PLC control unit controls the second stepping motor 215 to stop working;
step B4, if the tea leaves on the transfer conveyer belt 217 do not meet the uniform spreading requirement, repeating the steps B1-B3 until the tea leaves are uniformly spread;
step B5, when the tea leaves on the transfer conveyer belt 217 are all tiled, the longitudinal leaf homogenizing device and the transverse leaf homogenizing device are both located at the initial position, and meanwhile, no tea leaves exist on the first conveyer belt 219, the PLC control unit controls the transfer conveyer belt 217 and the first conveyer belt 219 to run at the same linear speed and in opposite running directions;
step B6, when all the tea leaves on the transfer conveyer belt 217 are transferred onto the first conveyer belt 219, the PLC control unit controls the first conveyer belt 219 to stop running; then the PLC control unit controls the first electric heating device 248 to start, and the tea leaves spread on the first conveyor belt 219 enter the baking process;
step B7, when the tea leaves on the first conveyor belt 219 reach the set baking time and no tea leaves exist on the second conveyor belt 220, the PLC control unit controls the second conveyor belt 220 and the first conveyor belt 219 to run at the same linear speed and in the opposite direction;
step B8, when all the tea leaves on the first conveyer belt 219 are transferred onto the second conveyer belt 220, the PLC control unit controls the second conveyer belt 220 to stop running; then the PLC control unit controls the second electric heating device 249 to start up, and the tea leaves spread on the second conveyor belt 220 enter the baking process;
step B9, when the tea leaves on the second conveyor belt 220 reach the set baking time and no tea leaves exist on the third conveyor belt 221, the PLC control unit controls the third conveyor belt 221 and the second conveyor belt 220 to run at the same linear speed and in the opposite running directions;
in the step B10, when all the tea leaves on the second conveyor belt 220 are transferred onto the third conveyor belt 221, the PLC control unit controls the third conveyor belt 221 to stop running; then, the PLC control unit controls the third electric heating device 250 to start, and the tea leaves spread on the third conveyor belt 221 enter the baking process;
step B11, when the tea leaves on the third conveyor belt 221 reach the set baking time and no tea leaves exist on the fourth conveyor belt 222, the PLC control unit controls the fourth conveyor belt 222 and the third conveyor belt 221 to run at the same linear speed and in opposite directions;
in the step B12, when all the tea leaves on the third conveyor belt 221 are transferred onto the fourth conveyor belt 222, the PLC control unit controls the fourth conveyor belt 222 to stop operating; then the PLC control unit controls the fourth electric heating device 251 to start, and the tea leaves spread on the fourth conveyor belt 222 enter the baking process;
step B13, when the tea leaves on the fourth conveyor belt 222 reach the set baking time, the PLC control unit controls the fourth conveyor belt 222 to operate, and the baked tea leaves are conveyed from the tea outlet hopper 224 to the horizontal conveyor 310 of the automatic tea leaf discharging unit;
step B14, repeating the steps B1-B13;
the discharging control process is as follows:
step C1, the PLC control unit controls the horizontal conveyor 310 to operate and conveys the baked tea leaves to the next working link;
and C2, repeating the step C1.
Claims (10)
1. The utility model provides a fragrant machine is carried to multilayer conveyer belt tealeaves which characterized in that: comprises a PLC control unit, a tea leaf automatic feeding unit, a fragrance-improving baking unit (210) and a tea leaf automatic discharging unit;
the automatic tea feeding unit comprises a vertical elevator (110) and an automatic tea weighing device (120) positioned at a discharge hole (112) of the vertical elevator; the automatic tea discharging unit comprises a horizontal conveyor (310) for conveying the discharged materials of the aroma raising baking unit;
the aroma raising and baking unit (210) comprises a transfer conveyor belt (217), a transverse leaf homogenizing device, a longitudinal leaf homogenizing device and a multi-layer conveyor belt baking unit; the transfer conveyer belt conveyor (217) is arranged below a discharge port of the tea automatic weighing device (120) and conveys tea to the multi-layer conveyer belt baking unit;
the transverse leaf homogenizing device is arranged above the transfer conveying belt (217) and moves along the length direction of the transfer conveying belt (217) to scrape tea leaves on the transfer conveying belt evenly, and the longitudinal leaf homogenizing device is arranged above the transfer conveying belt (217) and moves along the width direction of the transfer conveying belt (217) to scrape tea leaves on the transfer conveying belt evenly;
the multilayer conveyer belt cures the unit and includes that multilayer staggered arrangement and top-down carry the conveyer belt of tealeaves and install the unit is cured in the heating of conveyer belt both sides, and the opposite direction of operation of adjacent conveyer belt sets up.
2. The multi-layer conveyor belt tea aroma raising machine of claim 1, characterized in that: the multi-layer conveying belt baking unit comprises a first conveying belt (219), a second conveying belt (220), a third conveying belt (221) and a fourth conveying belt (222) which are arranged from top to bottom and are made of stainless steel materials, wherein the first conveying belt (219), the second conveying belt (220), the third conveying belt (221) and the fourth conveying belt (222) are arranged in a staggered mode, and screen holes are respectively distributed on the belt surfaces; the heating and baking unit comprises a first electric heating device (248), a second electric heating device (249), a third electric heating device (250) and a fourth electric heating device (251);
the first electric heating device (248) comprises far infrared electric heating plates (252) which are arranged on heat-insulating cover plates (223) on two sides of the first conveying belt (219) and are arranged at intervals along the length direction of the first conveying belt (219);
the second electric heating device (249) comprises far infrared electric heating plates (252) which are arranged on heat-insulating cover plates (223) on two sides of the second conveying belt (220) and are arranged at intervals along the length direction of the second conveying belt (220);
the third electric heating device (250) comprises far infrared electric heating plates (252) which are arranged on heat-insulating cover plates (223) at two sides of the third conveying belt (221) and are arranged at intervals along the length direction of the third conveying belt (221);
the fourth electric heating device (251) comprises far infrared electric heating plates (252) which are arranged on heat-insulating cover plates (223) on two sides of the fourth conveying belt (222) and are arranged at intervals along the length direction of the fourth conveying belt (222).
3. The multi-layer conveyor belt tea aroma raising machine of claim 1, characterized in that: the transverse leaf homogenizing device comprises a first stepping motor (213), a first stepping motor ball screw (229), an optical axis (231), a transverse moving scraper (227) and a transverse rubber plate (235);
the first stepping motor ball screw (229) is installed on one side of the transfer conveyer belt (217), the optical axis (231) is installed on the other side of the transfer conveyer belt (217), and the length directions of the first stepping motor ball screw (229), the optical axis (231) and the transfer conveyer belt (217) are parallel; one end of the transverse moving scraper (227) is installed with a screw nut (234) on a ball screw (229) of a first stepping motor through a scraper fixing seat (228), the other end of the transverse moving scraper (227) is installed with an optical axis nut (233) on an optical axis (231) through the scraper fixing seat (228), and the transverse rubber plate (235) is installed in a U-shaped groove below the transverse moving scraper (227); the first stepping motor (213) drives the ball screw (229) of the first stepping motor to rotate, so that the screw nut (234) reciprocates along the ball screw (229) of the first stepping motor and drives the transverse moving scraper (227) and the transverse rubber plate (235) to longitudinally move along the transfer conveyor belt (217) to scrape tea leaves evenly.
4. The multi-layer conveyor belt tea aroma raising machine of claim 3, characterized in that: the longitudinal leaf homogenizing device comprises a second stepping motor (215), a ball screw (245) of the second stepping motor, a longitudinal ball screw (246), a conical gear sleeve barrel (236), a longitudinal moving scraper (244) and a longitudinal rubber plate (247);
the second stepping motor ball screw (245) is installed at one end of the transfer conveyer belt (217), the longitudinal ball screw (246) is installed at the other end of the transfer conveyer belt (217), and the axial directions of the second stepping motor ball screw (245) and the longitudinal ball screw (246) are perpendicular to the length direction of the transfer conveyer belt (217); one end of the longitudinal moving scraper (244) and a screw nut (234) on a ball screw (245) of a second stepping motor are installed through a scraper fixing seat, the other end of the longitudinal moving scraper (244) and a screw nut on a longitudinal ball screw (246) are installed through a scraper fixing seat, and the longitudinal rubber plate (247) is installed in a U-shaped groove below the longitudinal moving scraper (244); a first conical gear (238) is coaxially installed on the second stepping motor ball screw (245), a fourth conical gear (241) is coaxially installed on the longitudinal ball screw (246), a first conical gear shaft (242) is installed at one end of the conical gear shaft sleeve (236), a second conical gear shaft (243) is installed at the other end of the conical gear shaft sleeve (236), a second conical gear (239) meshed with the first conical gear (238) is installed on the first conical gear shaft (242), and a third conical gear (240) meshed with the fourth conical gear (241) is installed on the second conical gear shaft (243); the second stepping motor (215) is in driving connection with a second stepping motor ball screw (245) to realize reciprocating movement of the second stepping motor ball screw (245) and screw nuts on the longitudinal ball screw (246) and drive the longitudinal moving scraper (244) and the longitudinal rubber plate (247) to transversely move along the transfer conveyor belt (217) so as to scrape tea leaves evenly.
5. The multi-layer conveyor belt tea aroma raising machine of claim 1, characterized in that: the automatic tea weighing device (120) comprises a weighing bottom plate (128), a compression spring (126) and a weighing hopper (121) supported and installed on the weighing bottom plate (128) through the compression spring (126), wherein a strain gauge (127) for sensing the deformation of the weighing bottom plate (128) and measuring the weight of tea in the weighing hopper (121) is installed on the weighing bottom plate (128); a weighing hopper cylinder (123) and a weighing hopper electromagnetic valve (125) for controlling whether a piston rod in the weighing hopper cylinder acts or not are arranged on the weighing hopper (121), a split discharging door (122) is arranged at an outlet at the bottom of the weighing hopper, and the piston rod in the weighing hopper cylinder is connected with the split discharging door (122) through a discharging door connecting rod (124); the piston rod of the weighing hopper cylinder conducts telescopic action and drives the split type discharging door (122) to move through the discharging door connecting rod (124) so as to open the outlet of the weighing hopper or close the outlet of the weighing hopper.
6. The multi-layer conveyor belt tea aroma raising machine of claim 2, characterized in that: the first conveyor belt (219), the second conveyor belt (220), the third conveyor belt (221) and the fourth conveyor belt (222) have the same running speed, wherein a tea discharging hopper (224) discharging tea leaves onto the horizontal conveyor (310) is arranged at the discharging position of the fourth conveyor belt (222).
7. The multi-layer conveyor belt tea aroma raising machine of claim 2, characterized in that: the heat-insulating cover plate is a double-layer heat-insulating cover plate filled with asbestos in the middle.
8. The multi-layer conveyor belt tea aroma raising machine of claim 3, characterized in that: the bottom of the screw nut (234) is provided with a sliding groove matched with a sliding rail on the first stepping motor ball screw fixing seat (230), and the bottom of the optical axis nut (233) is provided with a sliding groove matched with a sliding rail on the optical axis fixing seat (232).
9. The multi-layer conveyor belt tea aroma raising machine according to claim 4, characterized in that: when the longitudinal leaf homogenizing device is in the initial position, the longitudinal moving scraper (244) and the longitudinal rubber plate (247) are positioned outside the side edge of the transfer conveyor belt (217), and when the transverse leaf homogenizing device is in the initial position, the transverse moving scraper (227) and the transverse rubber plate (235) are positioned outside the end part of the transfer conveyor belt (217); the horizontal rubber plate (235) and the vertical rubber plate (247) are provided with sawteeth for scraping tea leaves evenly.
10. A method of controlling a multi-deck conveyor belt tea aroma raising machine according to any one of claim 4, wherein: comprises a feeding control process, an aroma raising baking control process and a discharging control process;
the feeding control process comprises the following steps:
step A1, starting a vertical elevator (110) by the PLC control unit to feed, and controlling the vertical elevator (110) to stop feeding when the tea amount in a weighing hopper of the automatic tea weighing device (120) reaches a set weight; then when no tea leaves exist on the transfer conveyer belt (217), the PLC control unit controls the split discharge door of the automatic tea leaf weighing device (120) to be opened and the tea leaves are thrown onto the transfer conveyer belt (217);
step A2, after the weighing hopper of the automatic tea weighing device (120) finishes feeding, the PLC controls the opposite-open discharge door of the automatic tea weighing device (120) to be closed;
step A3, repeating the steps A1-A2;
the baking control process is as follows:
step B1, after the tea leaves are thrown onto the transfer conveyer belt (217), the transverse leaf homogenizing device located right above the transfer conveyer belt (217) starts to work, the PLC control unit controls the starting of the first stepping motor (213) to drive the transverse moving scraper (227) to move along the ball screw (229) of the first stepping motor, and the tea leaves are uniformly spread along the length direction of the transfer conveyer belt (217);
step B2, after the transverse moving scraper (227) finishes the tiling work and returns to the initial position, the PLC control unit controls the first stepping motor (213) to stop working, at this time, the longitudinal leaf homogenizing device positioned right above the transferring conveyor belt (217) starts working, the PLC control unit controls the second stepping motor (215) to start, the longitudinal moving scraper (244) is driven to move along the second stepping motor ball screw (246), and the tea leaves are uniformly tiled along the width direction of the transferring conveyor belt (217);
step B3, after the longitudinal moving scraper (244) finishes the tiling work and returns to the initial position, the PLC control unit controls a second stepping motor (215) to stop working;
step B4, if the tea leaves on the transfer conveyer belt (217) can not meet the uniform spreading requirement, repeating the steps B1-B3 until the tea leaves are uniformly spread;
step B5, when the tea leaves on the transfer conveyer belt (217) are all tiled, the longitudinal leaf homogenizing device and the transverse leaf homogenizing device are both located at the initial positions, and meanwhile, no tea leaves exist on the first conveyer belt (219), the PLC control unit controls the transfer conveyer belt (217) and the first conveyer belt (219) to run at the same linear speed and in opposite running directions;
step B6, when all the tea leaves on the transfer conveyer belt (217) are transferred onto the first conveyer belt (219), the PLC control unit controls the first conveyer belt (219) to stop running; then the PLC control unit controls the first electric heating device (248) to start, and the tea leaves spread on the first conveying belt (219) enter the baking process;
step B7, when the tea leaves on the first conveyer belt (219) reach the set baking time and no tea leaves exist on the second conveyer belt (220), the PLC control unit controls the second conveyer belt (220) and the first conveyer belt (219) to run at the same linear speed and in the opposite direction;
step B8, when all the tea leaves on the first conveyer belt (219) are transferred onto the second conveyer belt (220), the PLC control unit controls the second conveyer belt (220) to stop running; then the PLC control unit controls the second electric heating device (249) to start, and the tea leaves spread on the second conveying belt (220) enter the baking process;
step B9, when the tea leaves on the second conveyor belt (220) reach the set baking time and no tea leaves exist on the third conveyor belt (221), the PLC control unit controls the third conveyor belt (221) and the second conveyor belt (220) to run at the same linear speed and in opposite running directions;
step B10, when all the tea leaves on the second conveying belt (220) are conveyed to the third conveying belt (221), the PLC control unit controls the third conveying belt (221) to stop running; then the PLC control unit controls the third electric heating device (250) to start, and the tea leaves spread on the third conveyer belt (221) enter the baking process;
step B11, when the tea leaves on the third conveyor belt (221) reach the set baking time and no tea leaves exist on the fourth conveyor belt (222), the PLC control unit controls the fourth conveyor belt (222) and the third conveyor belt (221) to run at the same linear speed and in opposite running directions;
step B12, when all the tea leaves on the third conveyer belt (221) are transferred onto the fourth conveyer belt (222), the PLC control unit controls the fourth conveyer belt (222) to stop running; then the PLC control unit controls the fourth electric heating device (251) to start, and the tea leaves spread on the fourth conveying belt (222) enter the baking process;
step B13, when the tea leaves on the fourth conveyer belt (222) reach the set baking time, the PLC control unit controls the fourth conveyer belt (222) to operate, and the baked tea leaves are conveyed from the tea outlet hopper (224) to the horizontal conveyor (310) of the automatic tea leaf discharging unit;
step B14, repeating the steps B1-B13;
the discharging control process is as follows:
c1, the PLC control unit controls the horizontal conveyor (310) to operate and conveys the baked tea leaves to the next working link;
and C2, repeating the step C1.
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