A kind of tea sifting and grading mechanism
Technical field
The present invention relates to tea-processing equipment, especially a kind of tea sifting and grading mechanism.
Background technology
Tea Processing is a numerous and diverse job, and each tealeaves monomer generally will could guarantee the quality of final finished through tens roads even twenties procedures, and in the Tea Processing industry, tealeaves being screened what generally adopt at first at present is the plane rotary strainer; But in the prior art; Often only adopt a standard to screen tea raw material, so just cause tea raw material thickness inequality, the situation that impurity is more after screening, still to occur; Such tea raw material is carrying out wind-force when sorting; Single wind speed is wanted the corresponding uneven tea raw material of thickness of handling, and makes the impuriting rate of equipment reduce greatly, has also increased difficulty for the processing of later stage operation.
Summary of the invention
Problem to be solved by this invention is exactly the shortcoming to prior art, and a kind of tea sifting and grading mechanism is provided, and has greatly promoted the impurity elimination usefulness of tea raw material in Preliminary screening through the multistage sub-sieve.
In order to solve the problems of the technologies described above; The present invention adopts following technical scheme: a kind of tea sifting and grading mechanism; Comprise screening machine and the winnowing machine that is connected with screening machine; It is characterized in that: be provided with two-layer at least screen cloth in the described screening machine, screen cloth is divided at least three screening chambers with screening machine, and each screening chamber is through the winnowing machine corresponding connection of conveyer with several different wind-force.
Further, be provided with the two-layer screen cloth of horizontally set in the described screening machine, screen cloth is with more than the screening machine inside and the following screening chamber, upper strata that is divided into successively, the screening chambers of screening chamber, middle level and lower floor's three vertical distributions in screening chamber.
Further, screening chamber, described upper strata, screening chamber, middle level and lower floor's screening winnowing machine that the chamber connected are set by wind-force from big to small successively.Tealeaves in the screening chamber, upper strata serves as that the master is the bigger tealeaves of blade with epimere tea; Be main with stage casing tea and lower end tea in middle level screening chamber and the lower floor screening chamber; The winnowing machine that gets into different wind-force respectively carries out more sorting of thin level; Epimere tea is imposed large wind, and hypomere tea is imposed less wind-force, impurity elimination usefulness has been brought very big lifting.
Further, described conveyer comprises the transport tape that is connected with the discharging opening of screening chamber, and the other end of transport tape is connected with winnowing machine through the air channel is set, and this cover conveyer makes entire mechanism that continuity preferably arranged, and has reduced working strength of workers,
Further, described transport tape and air channel are enclosed construction, have guaranteed that the tealeaves work in-process does not receive extraneous secondary pollution.
Further, be connected with aggregate bin on the discharging opening of each winnowing machine, the bottom of this aggregate bin is provided with tealeaves discharging opening and miscellaneous object outlet, and the below of aggregate bin is the conveyer belt that is connected with next procedure.
Preferably, between tealeaves discharging opening and conveyer belt, be provided with the static selecting device.
The invention has the advantages that: utilize multistage sub-sieve and many grades of corresponding wind combine tealeaves is sorted, the selection by winnowing precision has had very big lifting; The equipment continuity is strong, and automaticity is high, has reduced working strength of workers; Also set up the static selecting device in the present invention, other foreign material that in selection by winnowing, can't reject tealeaves screen, and further improve impuriting rate.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is a side structure sketch map of the present invention;
Fig. 2 is the syndeton sketch map of screening machine of the present invention and winnowing machine.
The specific embodiment
Like Fig. 1, shown in Figure 2; The invention provides a kind of tealeaves screening plant; Comprise screening machine 1 and the winnowing machine that connects in screening machine 1, be provided with two-layer screen cloth 14 in the described screening machine 1, screen cloth 14 is with more than screening machine 1 inside and the following screening chamber 11, upper strata that is divided into successively; 13 3 the screening chambers that vertically distribute in screening chamber 12, middle level and lower floor screening chamber; Each screening chamber is through the winnowing machine corresponding connection of conveyer with several different wind-force, and the winnowing machine of connection is pressed wind-force and set successively from big to small, and wherein upper strata screening chamber 11 connects the winnowing machine 4 of maximum wind-force; Screening chamber, middle level 12 connects the winnowing machine 4a of middle-grade wind-force, and lower floor screening chamber 13 connects the winnowing machine 4b of low-grade wind-force.Adopt three sections sub-sieves and third gear corresponding wind combine tealeaves is sorted, the selection by winnowing precision greatly promotes.
Described conveyer comprises the transport tape 2 that is connected with the discharging opening of screening chamber; The other end of transport tape 2 is connected with winnowing machine through air channel 3 is set; This cover conveyer makes entire mechanism that continuity preferably arranged; Reduced working strength of workers, transport tape and air channel are enclosed construction, have guaranteed that the tealeaves work in-process does not receive extraneous secondary pollution.
Be connected with aggregate bin 5 on the discharging opening of each winnowing machine, the bottom of this aggregate bin 5 is provided with tealeaves discharging opening 52 and miscellaneous object outlet 51, and the below of aggregate bin is the conveyer belt 7 that is connected with next procedure.As preferred version, be provided with static selecting device 6 at tealeaves discharging opening 52 and 7 of conveyer belts, the operation principle of static selecting device 6 is identical with prior art; Be that the electronic impulse electrostatic generator produces the high direct voltage up to 30 kilovolts, be transported on the electrostatic roller, make between electrostatic roller and the feeding roller and produce the high-voltage electrostatic field; Produce polarization phenomena when tealeaves passes through electrostatic field, the moisture content of tea stalk is slightly high, and the induction electric weight is bigger; Receive the electrode attraction also big, be prone to by the electrostatic roller sucking-off; And the moisture content of tealeaves is lower slightly, and induction electricity ratio tea stalk is little, receives the electrode attraction also little, makes stalk different with the horizontal displacement of leaf when falling, and the adjustment of putting through the separating plate he again reaches the purpose of stalk, leaf separation.The tea outlet 61 of the tealeaves of separating through static selecting device 6 bottoms falls on the conveyer belt 7, and tea stalk and other foreign material then from the side stalk outlet 62 fall into litter-bin.