JPH08117110A - Extraction vessel device - Google Patents

Abstract

PURPOSE: To facilitate flushing away of the fine raw material lees remaining on the base of an extraction vessel for recovering an extraction liquid and lees from a discharge port and to shorten washing time by supporting a screw conveyor of this extraction vessel in such a manner that its one end side is made rotatable in a position proximate to the base and the other end side rotatable in a position apart upward therefrom. CONSTITUTION: The trough type extraction vessel 3 which has a jacket 1 for heating covering its outside surface, is crowned openably and closably with many sheets of cap plates 2 on its ceiling and has the base of a semicylindrical type is provided with a bearing device 8 changeable in position vertically by means of a hydraulic cylinder 7 on the inner side of the rightward end wall. The screw conveyor 9 is inserted into the extraction vessel 3. The bearing device 8 is utilized by setting the bearing device at a down position to position the screw conveyor in the state proximate to the base at the time of carrying out an extraction operation and by setting the bearing device at an up position to position the screw conveyor in the state apart upward from the base at the time of carrying out a washing operation. The clearance between the bottom of the extraction vessel and the screw conveyor is then widened and the flow rate of the washing liquid is increased, by which the fine lees are flushed away.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extraction tank apparatus for extracting tea, coffee, herbal medicine, and other extracted beverages.

[0002]

2. Description of the Related Art Conventionally, this type of extraction tank apparatus is of a type in which a screw conveyor is rotated only at a position close to the bottom surface of the extraction tank. For this reason, at the time of washing in the tank performed after the extraction operation, it was difficult to wash out fine residue remaining at the bottom of the tank.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel extraction tank device which has a device for facilitating the washing of fine dregs remaining at the bottom to shorten the washing time.

[0004]

In order to achieve the above object, an extraction tank apparatus according to the present invention receives hot water from a hot water spout for extraction and an extraction raw material from an extraction raw material supply device, and supplies these hot water and the extraction raw material. Is transferred to the discharge end side over a predetermined time by a screw conveyor that is rotationally driven in the tank, and in the type of extraction tank in which the extract and the raw meal are collected from the discharge port, one end side of the screw conveyor is The other end side is rotatably supported at a position close to the bottom surface and a position apart from the upper side at a fixed position close to the bottom surface of the extraction tank.

[0005]

In the embodiment shown in the figure, a trough-shaped extraction tank 3 having a semi-cylindrical bottom surface, whose outer surface is covered with a heating jacket 1 and a number of lid plates 2 are openably and closably mounted on the top surface. The drive motor 5 is mounted on the outer surface of the left end wall of the extraction tank 3 with its rotating shaft 6 protruding into the extraction tank 3.
A bearing device 8 is provided on the inner side of the right end wall of the screw cylinder 8 so that the vertical position can be changed by a hydraulic cylinder 7, and a screw conveyor 9 is inserted into the extraction tank 3 to rotate one end of the central shaft 10 of the screw conveyor 9 as described above. The shaft 6 is connected to the projecting end through a rotary joint 11, and the other end is also supported by a bearing device 8.

In the figure, reference numeral 13 denotes an open type auxiliary bearing (stopper), 14 denotes a discharge port for discharging raw material and extract together, 15 denotes a rotary cleaning liquid jetting pipe having a large number of small holes 16, 17. Indicates a stand.

According to the present invention, a motor, air pressure, or the like can be used instead of the hydraulic cylinder 7.

When the extraction operation is performed, the bearing device 8 is lowered to the screw conveyor 9 so as to be close to the bottom surface of the extraction tank 3. It is used as a state separated upward.

[0009]

The present invention receives hot water from a hot water spout for extraction and an extraction material from an extraction material supply device, and the isothermal water and the extraction material are rotated by a screw conveyor in a tank for a predetermined time to a discharge end side. In the extraction tank of the type that collects the extract and the raw material lees from the outlet, the one end side of the screw conveyor is close to the bottom surface of the extraction tank and the other end side is at a position away from and above the extraction tank. It is characterized in that it is rotatably supported at a fixed position close to the bottom surface of the screw conveyor, so that one end side of the screw conveyor can be used away from the bottom surface of the extraction tank when performing a washing operation. In this case, the clearance between the bottom of the extraction tank and the screw conveyor is widened, and the flow rate of the cleaning liquid flowing through this section is increased. Due to the increase in the flow rate, the fine residue remaining at the bottom of the extraction tank is easily washed away. Further, the washing time can be shortened by facilitating the washing.

[0010]

Since the extraction tank apparatus according to the present invention has the above-mentioned structure, it has excellent effects such as easy removal of fine residue remaining at the bottom and shortening of the cleaning time. Things.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an extraction tank device according to the present invention.

FIG. 2 is a sectional view of a portion taken along the line AA in FIG.

FIG. 3 is a sectional view showing a state where the screw conveyor is moved upward.

FIG. 4 is a cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jacket 2 Cover plate 3 Extraction tank 5 Driving motor 6 Rotary shaft 7 Hydraulic cylinder 8 Bearing device 9 Screw conveyor 10 Center shaft 11 Rotary joint 13 Auxiliary bearing 14 Outlet 15 Spouting pipe 16 Small hole 17 Stand

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Hayashi 3-17-10 Higashi-Kojiya, Ota-ku, Tokyo Iwai Machinery Co., Ltd.

Claims (1)

[Claims] 1. A predetermined time is taken toward a discharge end by a screw conveyor that receives hot water from a hot water spout for extraction and an extraction raw material from an extraction raw material supply device and rotates the isothermal water and the extraction raw material in a tank. In an extraction tank of a type that transports and collects extract and raw material lees from an outlet, one end side of the screw conveyor is close to the bottom surface of the extraction tank, and the other end side is the bottom surface of the extraction tank at a position away from and above. An extraction tank device characterized in that it is rotatably supported at a fixed position close to the device.