JPH03160947A - Carrying belt steamer for preparing tea - Google Patents

Abstract

PURPOSE:To precisely adjust the extrusion amount of steam and subject tea leaves to a steaming treatment in a suitable condition to improve the quality of the product by constituting all or a part of many steam-extruding tubes disposed in a steaming chamber in such a state to enable to close the steam extruding tubes with valves. CONSTITUTION:A steaming chamber 4 is formed in the carrying area of a net conveyor style carrying conveyor 2, and several to ten-several steam- extruding tubes 5 constituted in a dead-end state wherein the tips of the tubes are closed are disposed in the steaming chamber 4 and connected to a steam- supplying base tube 6 disposed on one or both sides of the steaming chamber 4. Valves are attached to all or a part of the base portions of the steam- extruding tubes 5 or the base end portions of the steam-supplying base tube 6. Several of the valves 7 are closed or opened and the pressure of the steam is simultaneously adjusted to control the extrusion amount of steam, thereby always subjecting tea leaves to a suitable steaming treatment to prepare a green tea product having a high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a tea steamer configured to adjust the amount of steam blown out by using steam pressure and valve operation in combination.

(Prior art) A tea leaf steamer is a continuous type tea leaf steamer using a net conveyor type transfer conveyor, and a steaming chamber is formed under L of the transfer area of the conveyor, with dozens of discharge holes. A large number of steam discharge pipes are disposed within the conveyor net, and steam is blown out toward the raw tea and sweets loaded on the conveyor net to steam them.

It is necessary to uniformly blow out steam from the discharge hole of the steam discharge pipe, but the steam discharge pipe is connected to a supply source pipe installed on one side of the steaming chamber, and its tip is closed. Because it is a dead end, and because the ejection force of steam from the discharge hole is weakened so that the tea confectionery will not be damaged by being sprayed with steam, the discharge hole on the distal side is compared to the discharge hole on the proximal side. There is a tendency that the amount of steam blown out from the outlet hole is inevitably smaller.

Therefore, there is a problem in that the steaming rate of the tea confectionery varies depending on the position where it is placed on the conveyor net.

As a means to solve this problem, the present inventor installed several types of steam discharge pipes with different perforation positions of the discharge holes, and installed supply pipes on both sides of the steaming chamber and connected them to one supply pipe. He invented a conveyor belt steamer for tea production in which a steam discharge pipe connected to the other supply source pipe was arranged alternately, and a patent application has already been filed (Japanese Patent Application Laid-Open No. 192248-1988). .

(Problems to be Solved by the Invention) The above-mentioned tea manufacturing steamer takes advantage of the fact that a large number of steam discharge pipes are installed in the steaming chamber. While we tried to blow out steam evenly from the base end to the tip of the discharge pipe, we decided to combine and arrange steam discharge pipes with different biases, which would cause the steam to blow out unevenly. Regarding the steam discharge pipe, the steam is blown out unevenly, but the steam is blown out evenly as a whole.

By the way, tea cakes are hunted for over half a year from early summer to late fall. Therefore, the characteristics of the tea confectionery vary markedly depending on the time of picking, and the characteristics also vary depending on the degree of growth and fattening of the confectionery at the time of picking, the weather, etc.

Therefore, when steaming tea confectionery, it is necessary to adjust the steam supply (steam amount, kg tea leaves/kg steam) according to its characteristics.

However, as mentioned above, the steamer for tea production weakens the steam ejection force from the discharge hole so that the tea confectionery will not be damaged by being sprayed with steam. Since it is carried out in the supply source pipe, there is a l. Steam at a low pressure of about 0.2 torr is fed into the chamber, and steam at a temperature of 100 degrees Celsius is slowly blown out from the discharge hole.

Therefore, the amount of steam cannot be controlled by adjusting the tightness of the valves in the supply pipe, but rather by adjusting the pressure of the steam inside the supply pipe. Since the pressure of steam is low, the range in which it can be adjusted is extremely narrow, and if the pressure of steam in the source pipe is lowered in an attempt to keep the amount of steam blown out below a certain level, the pressure of steam in the steam discharge pipe will decrease. As the pressure approaches normal pressure, steam is blown out from the discharge holes unevenly, just as when the valve is closed, and some discharge holes blow out almost no steam.

For this reason, conventional tea conveyor belt steamers cannot reduce the amount of steam supplied below a certain amount, so when processing tea leaves that require a small amount of steam, the rotation speed of the conveyor must be increased. Since the problem had to be dealt with by shortening the treatment time, it was not always possible to carry out the steam treatment under appropriate conditions.

SUMMARY OF THE INVENTION An object of the present invention is to provide a means for widening the adjustment range of the amount of steam so that a predetermined amount of steam can be uniformly blown out even when the amount of steam is small.

(Means for Solving the Problems) The present invention is based on the point that several to more than ten steam discharge pipes are arranged in the steaming chamber of a steamer for tea making, all or part of which are arranged. A knob is installed at the base end of the steam discharge pipe, and the supply amount cannot be adjusted by simply changing the steam pressure, so by opening and closing several valves, the steam discharge pipe This can be adjusted by increasing or subtracting the apparent number of wires.

(Example) Hereinafter, the tea processing steamer according to the present invention will be specifically described based on the illustrated example.

FIG. 1 shows a side view of a tea feeding belt steamer, and FIG. 2 shows a plan view. In the figure, reference numeral 1 is a machine frame, to which a net conveyor type transfer conveyor 2 is attached.

This transfer conveyor 2 has a transfer trajectory set by guide pulleys 3 provided at both front and rear ends of the machine frame 1 or at appropriate locations, and the transfer area is covered with an upper cover 41 and a lower cover 42 to form a steaming chamber 40. , 41, are formal precepts.

Further, a quantitative feeder 21 for raw tea leaves is provided at the starting end of the transfer conveyor 2 so that the tea confectionery passes through the steaming chamber 4 6 .

Inside each steaming chamber 4, several to ten or more steam discharge pipes 5 are disposed at right angles to the transfer direction of the transfer conveyor 2, and these are disposed on one or both sides of the steaming chamber 4. The main supply pipe 6 is connected to the main supply pipe 6.

This steam discharge pipe 5 is closed at the tip and arranged in a dead-end state, and has a plurality of discharge holes 51 bored on the surface facing the conveyor net. Valves 7 are attached to the base of the tea, and by opening and closing some of the valves 7, 1.
Steam of about 0.2 Lorr is blown out from a desired discharge hole 5l of the steam discharge pipe 5 toward the tea cakes placed on the transfer conveyor 2.

Figure 3 shows a combination of a supply pipe 6 whose discharge hole 51 is pierced with a position biased towards the distal end and a supply stock pipe 6 whose discharge hole 51 is pierced with a position biased toward the proximal end to blow out steam uniformly as a whole. This shows an example of such a configuration. In this case, the valves 7-1, 71, 7-7 of every second steam discharge pipe 5...
When closed, the amount of steam blown out is reduced to two-thirds without substantially impairing the uniformity of the distribution of the discharge holes 5L.

Moreover, in this case, as shown in FIG.
, 5-4, 5-7... are connected to one supply source pipe 6, it is sufficient to attach the valve to the base end of the supply source tube 6. (Function) According to the present invention The steamer is a device in which all or some of the several to more than ten steam discharge pipes installed in the steaming room are opened and closed by valve operation. By opening and closing some steam discharge pipes, the number of apparently -E installed can be adjusted, and the amount of steam blown out under a certain pressure range can be adjusted.

(Effects of the Invention) According to the present invention, the steaming chamber of the conveyor belt steamer for tea manufacturing has several wood 4. ~ Focusing on the fact that more than a dozen steam discharge pipes are installed, by making all or some of the steam discharge pipes W4 closeable and opening and closing some valves, the apparent appearance of the steam discharge pipes can be improved. By adjusting the number of pipes installed, the adjustment range for the amount of steam blown out is awkwardly expanded by using both the steam pressure adjustment and the opening/closing adjustment of the valve 7, and it is difficult to adjust the amount by simply changing the steam pressure. Since the amount of steam blown out can be adjusted to a range that was previously impossible, it is now possible to supply the amount of steam that matches the required amount of steam.
By always performing the steaming process under appropriate conditions, it is possible to obtain high-quality green tea products.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a partially enlarged side view showing an embodiment of the tea processing steamer according to the present invention, Fig. 2 is a partially enlarged plan view of the same, and Figs. 3 and 4. FIG. 2 is an explanatory diagram showing the arrangement of steam discharge pipes. 1: Machine frame 2: Transfer conveyor 3: Guide pulley 21: Fixed amount feeder 9 5: Steam discharge pipe 4: Steaming chamber 51: Discharge hole 41: Lid 6: Supply source pipe 42: Lower lid 7: Valve

Claims (1)

[Claims] A steaming chamber is formed in the transfer area of the net conveyor-type transfer conveyor, and several to more than ten steam discharge pipes each having a closed end and a dead-end configuration are arranged inside the chamber. A valve is attached to the base of all or part of the steam discharge pipe or the base end of the supply pipe of the tea delivery belt steamer, which is connected to the supply pipe provided on one or both sides of the steaming chamber, A steamer for making tea, characterized in that the amount of steam blown out is adjusted by opening and closing some of the valves.