JPH03123648A - Grinding type rice mill for brewing sake - Google Patents

Abstract

PURPOSE:To effect an efficient heat dissipation from the inside of a tank by a method wherein a heat pipe for heat dissipation purposes is provided in a tank extending vertically and downwardly therein and the heat pipe is provided with a plurality of heat transfer plates in an radial manner. CONSTITUTION:The rice grains lifted by a grain lifter 15 are sent through a tank 11 back into a rice mill 13 so as to be polished and likewise circulated to be processed into more highly polished rice grains, with the accompanying rise in the rice temp. and loss of the water contained in the rice grains. In order to prevent an excessive rise in the rice temp. and the resulting loss of the water, a heat pipe 53 is provided in the tank 11 and the inside of the tank 11 is cooled by gasifying a liq. medium in the heat pipe 53. The gasified gas rises in the pipe and its heat is transmitted to a heat fin 61. After the transmission of this heat from the heat fin 61 to a cooling air, a liq. results again and moves downwardly. This can prevent the quality degradation of the rice.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a grinding type rice polishing device for sake brewing.

[Conventional technology]

Conventionally, a vertical grinding type rice polishing machine has generally been used as a rice polishing machine for sake brewing rice. It is equipped with a non-perforated polishing tube, and uses circulation means to pass through the milling chamber many times to polish highly polished sake rice. Normal sake-brewing rice is polished to a yield of about 50 to 70%, but ginjo rice is particularly polished to a yield of about 30%. As the rice grains are polished many times in the milling room, the temperature of the rice rises and the water content decreases, resulting in quality deterioration. Particularly in the tank, a large amount of rice grains is stored and heat dissipation is hindered, resulting in significant quality deterioration due to an increase in rice temperature. Therefore, in order to lower the rice temperature,
There is a method of suppressing the rise in temperature of rice grains by arranging a pipe for circulating fluid such as cooling water in the tank. However, in this method, since there is a large temperature difference between the air temperature near the outer wall surface of the pipe and the inner wall of the pipe, dew condenses and water droplets adhere to the outer wall surface of the pipe. There is also the problem that rice bran adheres to the water droplets and sticks to the inner wall of the tank, causing mold, and that the rice grains, which rot and emit an odor, are mixed into the polished rice.

[Problem that the invention seeks to solve]

The object of the present invention is to solve the above-mentioned problems and to provide a grinding rice milling device for sake brewing that can hygienically and efficiently dissipate heat in a tank and suppress a rise in the temperature of rice grains.

[Means for solving problems]

In order to achieve this object, the present invention has the following configuration.

A grinding type whitening trochanter is rotatably installed inside the whitening cylinder, and a whitening chamber is mainly formed by a gap between the whitening trochanter and the inside of the whitening cylinder, and a supply port and a discharge port leading to the whitening chamber are provided. In a grinding-type rice milling device for sake brewing, in which the supply port and the discharge port are connected by a circulation path consisting of a bran removal means, a grain lifting machine, and a tank, a heat dissipating device is provided that hangs inside the tank. multiple heat transfer plates are attached radially to the heat pipe.

[For production]

The rice grains are sent from the supply port to the milling room, where they are milled by the milling action produced by the rotation of the grinding milling trochanter. The milled rice grains are discharged from the discharge port, fed into a tank via a bran removal means and a grain lifting machine, and then supplied from the tank to the rice milling machine again for milling. Processed into

Then, the rice grains, whose rice temperature has increased due to the polishing action, are transferred from the heat transfer plate to the heat pipe in the tank where the rice grains are retained, and the heat is efficiently radiated by the heat pipe.

〔Example〕

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the drawings. A box-shaped outer wall 1 extending in the vertical direction is formed almost airtight, and a picture opening 2 and an air exhaust opening 3 are opened at appropriate locations. A damper 5 which is opened and closed by a motor 4 is attached to the picture air outlet 2, and an exhaust fan 6 is provided to the air outlet 3 together with a motor 7. Also, inside the outer wall 1 are a humidity detector 8 and a temperature detector 9.
and are fixed to the wall, and these detectors 8゜9 are connected to the operation panel 10.
It is connected to a control section 57 built into the.

A tank 11 is provided in a suspended state approximately at the center of the outer wall 1, a heat pipe 53 is suspended approximately at the center of the tank 11, and a plurality of heat transfer plates 60 are attached to the pipe 53 (a second (see figure).

The heat pipe 53 has a vacuum inside and a liquid medium is injected into it. A heat fin 61 is attached to the upper end of a heat pipe 53 protruding from the tank 11, and the heat fin 61 is surrounded by a cooling cylinder 62. The cooling tube 62 is provided with a cooling air intake tube 63 and an exhaust tube 64, and the air intake tube 63 is connected to a cooling air generator (not shown). The lower end of the tank 11 is connected to a supply port 14 of a rice mill 13 via a screw conveyor 12, and the upper end thereof is connected to a circulation chute pipe 16 provided at a discharge section of a grain lifting machine 15. and,
A supply port 17 is opened on the front wall of the lower part of the grain lifting machine 15, and a hopper 18 is provided, and this hopper 18 and the rice milling machine 1
A vibrating sieve 20 as a bran removal means is installed horizontally between the discharge gutter 1.9 of No. 3 and the discharge gutter 1.9. Bran collection hopper 21 with vibrating sieve 20
is connected to the bag filter 23 via the blower 22 and the conveying pipe 22a. Further, a motor 24 is provided at the upper end of the grain lifting machine 15 in conjunction with and connected to the upper shaft, and a discharge chute pipe 2 whose lower end faces the outside of the outer wall 1 is provided at the discharge portion.
5 is provided to be branched from the circulation chute pipe 16, and a switching valve 26 operated by a motor 27 is provided at this branch portion. An external supply hopper 58 is provided on the side wall of the lower end of the grain lifting machine 15.

Next, the rice polishing machine 13 will be explained (see FIG. 3). The rice polishing machine 13 is of a so-called vertical grinding type, and has a main shaft 29 rotatably installed in a non-porous polishing cylinder 28. That is, the upper end of the main shaft 29 is supported by a bearing 31 fixed to a steel plate 30, and the shaft 34 of a motor 33 is fitted into a hollow part 32 formed at the lower end of the main shaft 29, and is fastened with a bolt 35. The motor 33 is fixed to a pedestal 36 and is equipped with a speed change means using an inverter system or the like. Further, a lower feed roller 38 having a hollow portion is pivotally attached to the main shaft 29 directly above the bottom plate 37 of the polishing cylinder 13, and the lower milling roller 39 having a hollow portion, the upper feed roller 40, and the upper milling roller 38 are arranged upwardly in order. The rollers 41 are integrally mounted, thereby forming a milling chamber 59 whose main portion is between the upper and lower milling rollers 39, 41 and the milling cylinder 28. A pressing plate 42 is placed on top of the upper milling roller 41 and a nut 43 is placed in contact with the upper milling roller 41.
A plurality of kick-out claws 44 are provided on the peripheral edge of the presser plate 42 to project downward.

A discharge port 45 is opened near the upper end of the polishing cylinder 13, and a discharge gutter 19 is provided in the discharge port 45, and a resistance plate 46 is attached to bias the discharge port 45 (biasing means is not shown). ). The main shaft 29 has an open upper end to form a hollow shape, and the blower 4 is connected to the opening 31a of the bearing 31.
7 is provided, and blow holes 48 are appropriately bored in order to cool the hollow portions of the upper and lower milling rollers 39 and 41.

Further, an arcuate opening 49 is provided at the lower end of the polishing tube 13, and an air exhaust path 50 is formed.
2 is connected to the exhaust fan 51.

A water tank 54 is provided in the outer wall 1, and a mist generator 55 is provided connected to the water tank, and a part of the conveyor case 12a of the supply screw conveyor 12 is opened to expose a nozzle 56 for generating mist. . In this embodiment, the nozzle 56 is provided in the conveyor case 12a, but it may be installed in either the rice grain circulation flow path or the rice polishing machine 13.The rice polishing machine 13 may also be of a so-called vertical downstream type, and may be small in size. In this case, horizontal grinding type can also be used.

Hereinafter, specific operations in the above embodiment will be explained. Rice grains (brown rice) introduced into the supply hopper 58 are transferred to the tank 11 via the grain frying machine 15 and the circulation chute pipe 16.
Get stuck inside.

Then, start the motor (not shown) and screw conveyor 1.
2, the rice grains are sent to the milling chamber 59 side by the lower feed roller 38, and the rice grains are fed to the milling chamber 59 side by the lower milling roller 39
After being subjected to the grinding action by the upper feed roller 40, the grain is further fried by the upper milling roller 41, and is discharged from the discharge port 45 against the resistance plate 46 by the kicking pawl 44, and is discharged from the discharge gutter. The liquid is supplied to a vibrating screen 20 via a filter 19. Grain lifting machine 15 by vibrating screen 20
The rice bran and broken rice are removed while being transported to the hopper 18, but in order to prevent so-called squeaking, the amount of bran removed is adjusted to circulate some of the rice grains together with the rice grains. The rice grains in the milling chamber 59 alternately contact the milling rollers 39 and 41, and are locally peeled off by the abrasive cutting edges on the roller surfaces. The temperature of the rice grains increases due to the thermal energy of being peeled and the frictional energy due to contact between the rice grains and between the rice grains and the polishing tube.

In this way, the rice grains lifted by the grain lifting machine 15 are supplied to the rice milling machine 13 again through the tank 11 to be polished, and then circulated in the same manner to be processed into highly polished rice grains (white rice). As the rice temperature increases, the moisture contained in the rice grains is lost. In order to prevent this excessive rise in rice temperature and the resulting water loss, the tank 11
A heat pipe 53 is disposed inside. That is, tank 1
The heat of the rice grains in the tank 1 is transferred to the heat pipe 53 by the heat transfer plate 60, whereby the liquid medium in the heat pipe 53 is vaporized, and the heat of vaporization cools the inside of the tank 11. The vaporized gas rises in the pipe and is transferred to the heat fins 61, and after this heat is transferred from the heat fins 61 to the cooling air, it becomes liquid again and descends. In this way, the heat of the rice grains is transferred from the plurality of heat transfer plates 60 in the tank 11 into the heat pipe 53, and from the heat fins 61 to the cooling cylinder 6.
The heat is dissipated into the inside of the machine, is cooled by the cooling air supplied from the air intake pipe 62, and is exhausted to the outside of the machine from the air exhaust pipe 64.

Furthermore, when the moisture content of the rice grains has decreased to a certain extent after some time has passed after the start of operation, for example, when it has fallen below 13%, mist is sprayed onto the rice grains from the nozzle 56 to directly humidify the rice grains. This replenishes the moisture lost during rice milling and prevents quality deterioration.

Furthermore, the humidity and temperature inside the outer wall 1 are detected by the humidity detector 8 and the temperature detector 9, and the inside of the outer wall 1 is maintained at the optimal humidity and temperature for rice milling. That is, when the humidity inside the outer wall 1 is low, the mist generator 55 is operated via the control unit 57 to maintain the atmospheric humidity at, for example, 75% to 90%. on the other hand,
Since the temperature of the atmosphere rises with the start of operation, the motor 4 of the damper 5 and the motor 7 of the exhaust fan 6 are activated via the control unit 57 to maintain the temperature at, for example, 25 to 30° C., and take in outside air as appropriate.

Note that in high-temperature areas, an air cooling device may be provided to cool the atmosphere inside the outer wall 1.

In this way, by maintaining the atmosphere inside the outer wall 1 at a humidity and temperature suitable for rice milling, rice milling is carried out efficiently, and cracks do not occur in the rice grains even when the rice grains are exposed to the bran removal wind in the vibrating sieve 20. Never.

In addition, the air supplied to the hollow part of the main shaft 29 by the blower 47 is injected from the blow hole 48 into the hollow part in each milling roller 39, 41, thereby preventing each milling roller 39, 41 from becoming extremely hot. Works to prevent. In addition, white polishing cylinder 2
The rice bran and the like that accumulate at the bottom of the polishing tube 28 are removed by the exhaust fan 51 through the opening 49 at the lower end of the polishing tube 28.

The rice grains polished to a predetermined degree of polishing through the above steps are sent to the next step from the discharge chute pipe 25 by switching the switching valve 26. Further, the bran removed by the vibrating sieve 20 is collected in a bag filter 23.

〔effect〕

According to the grinding rice milling device for sake brewing according to the present invention, a plurality of heat transfer plates are attached to the heat pipe for heat dissipation that is provided hanging down inside the tank, so that rice grains whose temperature has increased due to the rice milling action are removed. Heat is efficiently radiated outside the tank by a heat pipe with a large amount of heat exchange, and the rice grains do not reach an abnormally high temperature, which prevents quality deterioration due to water evaporation. At this time, the heat transfer plate increases the contact area with the rice grains, so a large amount of heat from the rice grains can be transferred to the heat pipe, greatly improving the cooling effect. and,
Since it is a heat pipe, the temperature difference between the air temperature near the outer wall of the pipe and the inner wall of the pipe is small, and there is no chance of condensation or water droplets adhering to the outer wall of the pipe. Therefore, water droplets adhere to the bran, causing mold to develop, and rice grains, which rot and emit a strange odor, do not get mixed into the polished rice, making it very hygienic. moreover,
It is possible to improve rice milling efficiency by maintaining rice temperature appropriately.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a plan sectional view of a tank, and FIG. 3 is a partially enlarged sectional view of FIG.
FIG. 4 is a partially enlarged view of FIG. 1, and FIG. 5 is a control block diagram. 1...Outer wall, 2...Picture opening, 3...Exhaust port, 4.
...Motor, 5...Damper, 6...Exhaust fan, 7...
・Motor, 8...humidity detector, 9...temperature detector,
DESCRIPTION OF SYMBOLS 10... Operation panel, 11... Tank, 12... Screw conveyor, 12a... Conveyor case, 13...
... Rice milling machine, 14 ... Supply port, 15 ... Grain frying machine, 1
6... Circulation chute pipe, 17... Supply port, 1
8... Hopper, 19... Discharge gutter, 20... Vibrating sieve, 21... Bran hopper, 22... Blower,
22a...Transportation pipe, 23...Bag filter,
24...Motor, 25...Discharge chute pipe,
26... Switching valve, 27... Motor, 28... Refining tube, 29... Main shaft, 30... Top plate, 31... Bearing, 31a... Opening, 32... Hollow part, 33...
Motor, 34... Shaft, 35... Bolt, 36
... Frame, 37... Bottom plate, 38... Lower feed roller, 39... Lower milling roller, 40... Upper feed roller, 41... Upper feed roller, 4
2... Holder plate, 43... Nut, 44... Kick-out claw, 45... Discharge port, 46... Resistance plate, 47...
・Blower, 48...Blow hole, 49...Opening, 50・
...Exhaust duct, 51...Exhaust fan, 52...Exhaust pipe, 5
3... Heat pipe, 54... Water tank, 55... Mist generator, 56... Nozzle, 57... Control unit, 5
8... Supply hopper, 59... Refining room, 60...
Electric heating plate, 61... Heat fin, 62... Cooling cylinder,
63...Air intake tube, 64...Air exhaust tube.

Claims (1)

[Claims] A grinding type whitening trochanter is rotatably installed inside the whitening cylinder, and a whitening chamber is mainly formed by a gap between the whitening trochanter and the inside of the whitening cylinder, and a supply port and a discharge port leading to the whitening chamber are provided. In a grinding-type rice milling device for sake brewing, in which the supply port and the discharge port are connected by a circulation path consisting of a bran removal means, a grain lifting machine, and a tank, a heat dissipating device is provided that hangs inside the tank. A grinding rice polishing device for sake brewing, characterized by having a plurality of heat transfer plates attached radially to a heat pipe.