JPH06178649A - Tea-leaf steaming machine provided with scraping mechanism for tea-incrustation, etc. - Google Patents

Abstract

PURPOSE:To remove tea-incrustation, etc., attached to the mesh of a rotary mesh drum and to scrape off steamed leaves fallen on the bottom of a covering drum by blasting air through a number of nozzles of an ejection pipe against the rotary mesh drum and the covering drum of a tea-leaf steaming machine. CONSTITUTION:This steaming machine is provided with an ejection pipe 5 having a number of nozzles opened against a rotary mesh drum of 21 of the steaming machine and with an ejection pipe 6 having a number of nozzles opened against the bottom of a covering drum 22. Air is supplied to the ejection pipes with a compressor 52 to blast air against the mesh of the rotary mesh drum and the bottom of the covering drum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tea leaf steamer equipped with a mechanism for brushing off tea astringents and the like adhering to the mesh of a rotary mesh cylinder during operation and also for dropping damp steamed leaves falling on the bottom surface of a cover cylinder. Is.

[0002]

2. Description of the Related Art Tea leaves picked from a tea field are transported to a tea factory while maintaining their freshness, and are first subjected to steam heat treatment by a tea leaf steamer, and then subjected to treatments such as coarse kneading, kneading, middle kneading, and elaboration. It is processed into rough tea. The tea leaf steamer is a kind of rotary barrel type continuous processing machine, and the main body portion is composed of a fixed barrel portion and a rotary barrel portion, and a stirring shaft is provided so as to penetrate therethrough. The fixed barrel consists of a ventilation barrel, a fresh tea leaf inlet, and a steam chamber.
The rotary drum unit includes a rotary mesh cylinder and a cover cylinder that covers the rotary mesh cylinder. The rotary mesh cylinder is continuous with the ventilation cylinder, and the raw tea leaves introduced into the charging port are sent to the rotary mesh cylinder through the ventilation cylinder together with the steam supplied to the steam chamber, and the rotation and stirring of the rotary mesh cylinder are performed. It is agitated by the rotation of the blades, moves toward the end of the rotary net cylinder while being in contact with steam and being steamed, and when it has been steamed to a desired degree, it is discharged out of the machine from the end. On the other hand, the steam passes through the mesh of the rotary mesh cylinder and is discharged to the outside of the machine through the exhaust port formed in the cover cylinder. In addition, the water adhering to the raw tea leaves and the water generated by the dew condensation come out from the rotary net body so that the water droplets can be removed from the steamed tea leaves, and the minute steamed tea leaves also come out from here and are separated. It has become so.

[0003]

In the steam heat treatment step of tea leaves described above, tea astringency that exudes from the tea leaves by stirring, and some of the crushed leaf pieces adhere to the mesh of the rotary net cylinder,
This gradually increases as the work progresses. As a result, the mesh of the rotary mesh cylinder is gradually narrowed to reduce the steam permeability, and it becomes difficult for the moisture adhering to the raw tea leaves or the water generated by dew condensation to be released from the mesh, and the steam of the tea leaves is reduced. Since the heat treatment conditions have changed, the prescribed steamed tea leaves cannot be produced. In addition, when the amount of adhered tea astringent or the like increases, a part of the adhered tea leaves from the rotary net cylinder and mixes into the steamed tea leaves, which causes a problem that the quality of the product green tea deteriorates.
In addition, a groove-shaped collection window is opened on the lower surface of the cover cylinder, and a mechanism for collecting fallen steam leaves is provided below it, and a minute steam that falls out of the mesh of the rotary mesh cylinder during work and falls. The tea leaves are collected by this, but since the collection window has to be formed with a narrow width, a considerable amount of the fallen steamed leaves is on both sides of the collection window on the bottom of the cover. To be deposited on the part. Therefore, the collection efficiency of the fallen steamed leaves is reduced by that much, and when the accumulated amount is large, it becomes hard to remove and it obstructs the flow of steam in the covering cylinder, affecting the steaming conditions in the rotary net cylinder. There was also. The present invention aims to provide a tea leaf steamer that keeps steaming heat treatment conditions constant by brushing off tea astringents and the like that adhere to the mesh of a rotating net cylinder during operation, and falling off steamed leaves that fall to the bottom surface of the cover cylinder. And

[0004]

Means for Solving the Problems The present invention is provided with a fumarole tube having a large number of fumaroles directed toward the rotary net cylinder of a tea leaf steamer, where a certain amount or more of tea astringent is attached to the mesh, or By blowing air against the mesh at appropriate time intervals, the astringent aroma etc. adhering to the mesh is wiped off, and a fumarole tube with a large number of fumaroles is attached to the bottom of the covering cylinder. The above-mentioned object is achieved by the means for brushing off the fallen steamed leaves that fall into the. Air containing fine water droplets can be ejected from the fumarole.

[0005]

According to the present invention, by providing a large number of fumaroles toward the rotary mesh cylinder of the tea steamer, the tea astringent and the like adhering to the mesh of the rotary mesh cylinder is blown off by the air and peeled off from the rotary mesh cylinder. , The rotating mesh cylinder maintains a certain level of breathability. In addition, since a large number of fumaroles are provided toward the bottom surface of the cover cylinder, the accumulation of falling steamed leaves on the bottom surface of the cover cylinder is eliminated, and the flowability of steam in the cover cylinder is maintained.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The tea leaf steamer according to the present invention will be specifically described below with reference to the illustrated embodiments. In this embodiment, the main body of the tea steamer comprises a fixed barrel 1, a rotary barrel 2, and a stirring shaft 3.
And a collecting mechanism 4 for the fallen and steamed leaves is attached below it. The fixed barrel portion 1 is a portion that supplies fresh tea leaves and steam into the machine, and has a double structure of an outer barrel 11 and a ventilation barrel 12, and a steam chamber 14 is formed between the two. or,
The fixed body part 1 is provided with a raw tea leaf feeding port 13 which reaches the aeration barrel 12, and the raw tea leaves quantitatively supplied from a feeding hopper (not shown) directly pass through the feeding port 13. It is designed to enter the ventilation cylinder 12. Ventilation cylinder 12
The upper part is formed by using a ventilation plate and communicates with the steam chamber 14, and a steam supply pipe is connected to the steam chamber 14, so that the steam supplied from the boiler in a constant amount is temporarily supplied to the steam chamber 14.
After being blown in, the air can be blown into the ventilation barrel 12 through the ventilation plate. The rotary drum portion 2 is formed by using a ventilation plate such as a wire mesh or punching metal, and includes a rotary drum cylinder 21 that rotates at an appropriate speed and a cover drum 22 that covers the rotary drum cylinder 21. The rotary mesh cylinder 21 has a ventilation cylinder at the tip.
It is attached to 12 consecutively, it is inclined slightly downward toward the rear, the rear end is open, and raw tea leaves and steam introduced into the aeration cylinder 12 are sent from the aeration cylinder 12 to this rotary net cylinder 21. It is stirred by rotating it. Then, the water adhering to the raw tea leaves and the water produced by the dew condensation of the steam are discharged from the rotary net body 21 through the mesh together with a part of the steam, and the tea leaves with no excess water become steam. While contacting and steaming, it gradually moves to the rear, and when it has been sufficiently steamed, it falls from the rear end and is fed to the rough kneader by a transfer conveyor (not shown) provided below it. Has become. Stirrer shaft 3 is fixed body 1
Is provided so as to penetrate through the ventilation drum 12 of the rotary drum 2 and the rotary mesh drum 21 of the rotary drum portion 2, and several to ten or more feed vanes 31 are attached to the portion located in the fixed drum portion 1. The raw tea leaves put in 12 are sent together with the steam to the rotary net cylinder 21. In addition, a large number of stirring blades 32 are attached to the portion located on the rotary mesh cylinder 21, and in cooperation with the rotation of the rotary mesh cylinder 21, the tea leaves are stirred in the rotary mesh cylinder 21 and beaten. It is designed to be steamed while being in contact with steam while being softened. The cover cylinder 22 covers the rotary mesh cylinder 21, and a steam exhaust port 23 is formed in the rear part thereof to prevent the steam from escaping from the rotary mesh cylinder 21 and to retain the steam for a while in the rotary mesh cylinder 21. Is controlled to enhance the effect of steaming tea leaves. Further, a groove-shaped recovery window 24 is formed on the lower surface along the longitudinal direction so that minute falling steamed leaves and the like spilling from the mesh of the rotary mesh cylinder 21 are dropped from here. The fallen-steamed leaf collecting mechanism 4 receives the fallen-steamed leaves falling from the collecting window 24 and continuously removes them from the machine. A trough-shaped tray 41 is provided under the collecting window 24. There is a conveyor type drroom broom 42 on it,
Further, a feed-out conveyor 43 is attached to the tip of the receiving tray 41, and receives the falling steamed leaves falling from the collecting window 24.
At the same time as it is received at 41, it is swept up on the sending-out conveyor 43 and sent out of the machine to be collected.
The recovery window 24 is formed to have a diameter smaller than that of the rotary mesh cylinder 21 so that the cover cylinder 22 covers the rotary mesh cylinder 21 as wide as possible. Therefore, part of the steamed leaves spilling out from the rotary net cylinder 21 also falls on the bottom surface of the cover cylinder 22 on both sides of the recovery window 24 and accumulates on the part.

[0007] The cover of the tea leaf steamer thus configured
The fumarole pipe 5 is attached to the inside of 22 along the rotary net cylinder 21, and a large number of fumaroles are opened toward the rotary net cylinder 21 at intervals of about 10 to 30 mm. This fumarole 5
The solenoid valve 51 is connected to the compressor 52 via a solenoid valve 51, which is connected to a timer (not shown).
The air is blown toward the meshes to blow away the tea astringent and the like adhering to it. In particular, in this embodiment,
The auxiliary tank 53 is attached to the air pressure feeding path connecting the fumarole pipe 5 and the compressor 52, and the compressor 52 is operated even when the air is not jetted from the fumarole, and the air feeding ability of the compressor 52 within a predetermined time. In addition to feeding the above-mentioned air, an intake nozzle 54 is attached to this pressure feeding path so that the outside air is sucked in to increase the amount of the fumarolic pipe 5 to enhance the effect of blowing off the tea astringent. Each of the fumaroles blows air in a conical shape so that the air is blown evenly to the rotary net cylinder 21. Further, inside the cover 22 of the tea leaves steamer, a fumarole pipe 6 is attached along the bottom surface thereof, and a large number of fumaroles are opened toward the bottom surface. This fumarolic pipe 6 is connected to a compressor 52 via an intake nozzle, a solenoid valve and an auxiliary tank, and the solenoid valve is connected to a timer (not shown) so as to open an appropriate time interval to cover the body.
Air is blown toward the bottom surface of 22 to blow off the fallen steamed leaves accumulated on this surface and drop them out from the recovery window 24. The fumarolic pipe 6 is an intake nozzle of the fumarolic pipe 5.
It is possible to connect it to 54 and to inject air from the fumarole of the fumarolic pipe 5 and at the same time to eject air from the fumarole, and the intake nozzle 54 and the solenoid valve 51 are different from each other. It is also possible to connect to the auxiliary tank 53 via a nozzle and a solenoid valve so that air is not jetted from the fumaroles of the fumarolic pipe 5 and the fumarolic holes of the fumarolic pipe 6 at the same time.

When performing a steam heat treatment operation, a compressor
52 is operated to store air of a specified pressure in the auxiliary tank 53, and this air is sent to the fumarole pipe 5 every appropriate time, and the air is jetted from the fumarole toward the rotary net cylinder 21. Then, all or part of the tea astringent adhering to the mesh is removed. In addition, since the temperature in the rotary body 2 is lowered by injecting air, and the steaming heat treatment effect is reduced accordingly, it is preferable that the air injecting time is short within a range in which a desired stripping effect can be obtained. The time interval is preferably long as long as the tea astringent adhering to the mesh does not affect the steaming heat treatment and the tea astringent etc. peeled off from the rotary net cylinder 21 does not deteriorate the quality of the product green tea. From this point of view, it is suitable to inject air, for example, every 30 minutes for about 10 seconds. Further, in this work, when water or hot water is sucked from the intake nozzle 54, it becomes fine particles and is jetted from the fumarole along with the air, so that the apparent mass of the air is significantly increased, and the mesh is brown and astringent. The ability to get rid of etc. is significantly increased. Similarly, air is also ejected from the fumaroles of the fumarolic pipe 6 every time an appropriate time elapses. Then, this air is blown toward the bottom surface of the cover 22, and the deciduous leaves that have fallen and accumulated on this surface are blown off, fall from the collection window 24, and are collected from the tray 41 via the feed conveyor 43. It

[0009]

As described above in detail, according to the present invention, by blowing air toward the rotary mesh cylinder of the tea leaf steamer, the tea astringent and the like adhering to the mesh is wiped off, and the steam of the rotary mesh cylinder passes through. As well as maintaining the property, by blowing air toward the bottom surface of the cover, the steamed leaves that fall and accumulate on this surface are blown away. As a result, the steam heat treatment conditions are maintained constant, and at the same time, the water adhering to the raw tea leaves and the water generated by dew condensation are released from the net cylinder, and all the tea leaves are in the predetermined steam heat treatment conditions. Will be processed. Moreover, the tea astringent etc. that have adhered to the mesh of the rotating net cylinder and steamed for a long time will not be mixed in the steamed tea leaves, and a high quality product green tea can be obtained, and at the same time, the falling steam on the bottom of the cover cylinder Since the leaves are heated here by steam for a long time and recovered without being deteriorated, the leaves can be effectively utilized.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an example of a tea leaf steamer.

FIG. 2 is a vertical sectional front view showing a main part of the tea leaf steaming machine according to the present invention.

[Explanation of symbols]

 1 Fixed Body 2 Rotating Body 3 Stirring Shaft 4 Recovery Mechanism 5 Fume Tube 6 Fume Tube 13 Inlet 21 Rotating Net Body 22 Covering Body 31 Feeding Blade 32 Stirring Blade 51 Solenoid Valve 52 Compressor 53 Auxiliary Tank 54 Intake Nozzle

Claims (4)

[Claims] 1. A fumarolic pipe 5 having a large number of fumaroles opened toward a rotary net cylinder of a tea leaf steamer, which is connected to a compressor to form an air pressure feeding path, and a solenoid valve is provided in this pressure feeding path. The air is blown onto the mesh of the rotary mesh cylinder, and the fumarole pipe 6 having a large number of fumarole holes is attached to the bottom surface of the covering cylinder, which is connected to the compressor to form an air pressure feeding path. A tea leaf steamer equipped with a mechanism for removing tea astringent or the like, characterized in that the air is blown onto the bottom surface of the cover body by sending air into the fumarole. 2. A solenoid valve in the air pressure feeding path of the fumarolic pipe 6 is connected to a timer to feed air into the fumarolic pipe at predetermined time intervals for a predetermined time, and at the same time, a solenoid valve in the air pneumatic feeding path of the fumarolic pipe 6. 2. A tea leaf steamer having a mechanism for removing tea astringent or the like according to claim 1, wherein a timer is connected to the air blower and air is blown into the fumarole at predetermined time intervals for a predetermined time. 3. An auxiliary tank is attached between the solenoid valve and the compressor in the air pressure feeding path, and the compressor is operated even when the air is not being sent to the fumarolic pipe so that the air having a predetermined pressure is supplied to the auxiliary tank. A tea leaf steamer equipped with a mechanism for removing tea astringent or the like according to claim 1 or 2, wherein the tea leaf steamer is configured to store. 4. A suction nozzle is attached between a fusible pipe and an electromagnetic valve in a pressure feeding path of air so that outside air, water, or hot water is sucked from the suction nozzle. A tea leaf steamer equipped with a mechanism for removing tea astringency such as 2 or 3.