JPH02102747A - Suction changeover equipment for circulation type rice milling machine - Google Patents

Abstract

PURPOSE:To perform effective polishing work by suppressing suction force of an exhaust fan at the initial stage of polishing work and proceeding polishing work while a prescribed time and opening both a bran sucking value and a dust sucking valve at the stage reaching a polished state and discharging chaff, etc. CONSTITUTION:A bran sucking valve 42 is closably provided to a bran sucking cylinder 41 which is opened to a bran sucking duct side form a suction collecting chamber 23. A dust sucking valve 44 is closably provided to a dust sucking cylinder 43 which is opened to a dust sucking duct side. Further an auxiliary suction valve 46 is closably provided to an auxiliary suction port 45 for sucking the atmosphere which is formed to the side wall of the suction collecting chamber 23. An interlocking means 47 for opening, closing and actuating these valves 42, 44 and 46 is operated by a valve opening and closing means 49 with a timer 48 equipped thereto. In order words, the valves 42, 44 are closed and the valve 46 is opened at the initial stage of polishing work and when prescribed time elapses, the valve 46 is closed and the valves 42, 44 are opened. As a result, effective polishing work can be performed.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is used in the technical field of circulation rice milling machines, and in particular, an air intake switching device for each intake system that sucks rice hulls, rice bran, etc. using an exhaust fan. It is related to.

(Prior art) A conventional Wi-ring type rice milling machine has an air passage intervening in a route for dropping rice from the rice supply port at the lower end of the circulation tank that stores the rice into the milling roll chamber. Some types perform wind sorting by using the air (atmosphere) that draws debris etc. into an exhaust fan. In this circulation type rice milling machine, the rice bran and powdered rice hulls peeled off by the ff milling process in the milling roll chamber are dropped from the remover AY4 at the bottom of the milling roll chamber, and the rice bran and straw are removed in the air intake collection chamber of the exhaust fan. After combining with debris, it is sent to the cyclone dust collection chamber via an exhaust fan.

(Problem to be solved by the invention) However, in the initial stage of milling when the circulating rice milling machine is started, the rice hulls and rice bran that are separated from the rice grains are removed from the rice grains that are being air sorted using the strong suction power of the exhaust fan. When the rice grains are discharged outside, there is a problem that the rice grains in the milling room have no flow resistance due to the flakes, and milling takes time.

In view of the above-mentioned conventional problems, the present invention has been developed by suppressing the intake air amount of each intake system for wind sorting and rice bran discharge in the initial stage of milling process, and by allowing an appropriate amount of time to elapse to remove rice hulls and rice bran. This is an air intake switching device for a circulation-type rice milling machine, which removes rice hulls, rice bran, etc. by suctioning with strong suction force by releasing the intake air volume restriction of each intake system after the grain has been peeled (the rice has been polished). It is about providing.

(Means for Solving the Problems) The air intake switching device of the circulation rice milling machine of the present invention is designed to air-sort rice hulls, etc. between the rice grain supply port at the lower end of the circulation tank and the rice grain reception port in the milling roll room. At the same time, a hopper is installed in the lower part of the whitening roll room through a rice bran removal screen, and the rice bran tray has a rice bran suction duct communicating with the hopper and a dust suction duct communicating with the air passage. In a circulation type rice mill connected to an air intake collecting chamber of a fan, a bran suction valve is provided in a bran suction tube that opens from the air intake gathering chamber to a bran suction duct side, and a dust suction valve is provided in a dust suction cylinder that opens to a dust suction duct side. are provided so as to be openable and closable, respectively, and an auxiliary intake valve is provided so as to be openable and closable at the auxiliary intake port for inhaling the atmosphere formed on the side wall of the intake collective chamber. An interlocking means for operating and closing is provided, the interlocking means is operated by a valve opening/closing means equipped with a timer,
At the initial stage of milling processing, the bran suction valve and dust suction valve are closed and the auxiliary intake valve is opened, and after a predetermined period of time, the auxiliary intake valve is closed and the bran suction valve and dust suction valve are opened. It is.

(Function) The effect of the above means is that in the initial stage of milling, the bran suction valve and the dust suction valve are closed and the auxiliary suction valve is opened at the same time, and the suction force acting on the circulation path of the rice is suppressed for a predetermined period of time. The milling process is carried out in a highly resistant state in which peeled rice hulls and rice bran are mixed together. Thereafter, the bran suction valve and the dust suction valve are opened, and at the same time, the auxiliary intake valve is closed, and the wind-sorted rice hulls and straw waste, as well as the rice bran and the like that have passed through the bran removal screen, are discharged out of the machine by the exhaust fan.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The circulation type rice milling machine 1 shown in FIG. 1 is provided with a rice supply port 3 at the lower end of a circulation tank 2 for supplying rice in a drop-down manner. In between, an air passage 6 is provided for wind-sorting rice hulls, straw waste, etc.

A funnel part 7 is formed at the lower end of the circulation tank 2, and the funnel part 7 is opened to the air passage 6 side and serves as the rice grain supply port 3. The supply amount adjustment plate 8 provided in the rice supply port 3 has a base portion 8a pivotally connected to the short wall body 7b of the funnel portion 7, and a tip portion 8b that can move toward and away from the long wall body 7a. The rice supply port 3 is opened to the air suction chamber 9 side. The rice grain receiving port 5 of the milling roll chamber 4 has an inclined plate 10 parallel to the supply amount adjusting plate 8 on the air passage 6 side, and a rectifying plate 11 parallel to the long wall 7a facing upward on the air suction chamber 9 side. are open and facing each other, and a plurality of intake holes 12, 12... are formed in the rectifying plate 11, so that the air intake direction S is opposed to the rice grain supply direction C from the rice grain supply port 3. .

Further, at the upper end of the inclined plate 10, a base 10a is provided to prevent floating rice grains from being drawn toward the exhaust fan 22.
is formed.

At the axial center of the whitening roll chamber 4, there is a first integrally formed
A feed roll 13, a whitening roll 14, and a second feed roll 15 (hereinafter simply referred to as the whitening roll 14) are fitted in the horizontal direction, and a bran removal screen 16 is provided below them. A rising chamber 1 communicating with the circulation tank 2 from the outlet of the whitening roll chamber 4
The rising chamber 17 is provided with a resistance plate 18 for suppressing the rising movement of the rice grain group and increasing the friction between the rice grains, and an opening/closing M19 for taking out the polished rice when polishing is completed. A bottom plate 20 having an arcuate cross section is provided between the upper end portion of the funnel portion 7 and the funnel portion 7 .

On the other hand, an air intake gathering chamber 23 equipped with an exhaust fan 22 is provided on the base 21, and this air intake gathering chamber 23 has the above-mentioned m removal screen 1.
A rice bran suction duct 25 communicating with a ridge support hopper 24 provided below the air passage 6 and a dust suction duct 26 communicating with the air passage 6 are connected. An exhaust duct 27 extending from the intake air collection chamber 23 to the outside of the machine is communicated with a known cyclone dust collector 28 .

29 is a drive means such as a motor provided on the base 21, and this driving force is transmitted to the whitening roll 14, the exhaust fan 22, and a transmission mechanism consisting of a drive-side pulley 30, a roll-side pulley 31, a fan-side pulley 32, and a belt 33. 34.

The intake air switching device 50 shown enlarged in FIGS. 2 to 7 is the main part of the present invention, and is constructed as follows.

In the air intake collective chamber 23, a bran suction valve 42 is provided in a bran suction cylinder 41 that opens to the rice bran suction duct 25 side, and a dust suction valve 44 is provided in a dust suction cylinder 43 that opens to the dust suction duct 26 side so that they can be opened and closed.

Further, an auxiliary intake port 45 for inhaling the atmosphere that communicates with the outside of the machine is formed in the side wall of the intake collective chamber 23, and an auxiliary intake valve 46 such as a wind door is provided in the auxiliary intake port 45 so as to be openable and closable.

Between the auxiliary intake valve 46 and the bran suction valve 42 and the dust suction valve 44, the auxiliary intake valve 46 is connected to the bran suction valve 42 and the dust suction valve 44 when the bran suction valve 42 and the dust suction valve 44 are closed and opened. An interlocking means 47 for opening and closing operations opposite to the opening and closing direction is provided, and the interlocking means 47 is operated by a valve opening/closing means 49 such as a solenoid equipped with a timer 48.

As shown in FIG. 4, the rice bran suction valve 42 is a plate-like body having a notch 42a that allows some air to pass through even when it is fully closed. The rice bran is sucked into the intake air collection chamber 23 and discharged. One side of a support shaft 51 fitted into the boss portion 42b and the bran sucking cylinder 41 projects outward.

As shown in FIG. 5, the dust suction valve 44 is formed of a rectangular plate-like body with a boss portion 44a biased to one side, and one side of a support shaft 52 fitted into the boss portion 44a and the dust suction tube 43 is directed outward. A sealing member 53 made of a flexible material is mounted on the support shaft 52 side inside the dust suction cylinder 43 .

The auxiliary intake port 45 is provided to satisfy the normal intake amount of the exhaust fan 22 when the rice bran suction valve 42 and the dust suction valve 44 are closed, and is formed on the side wall of the intake air collection chamber 23. The base of the auxiliary intake valve 46 is fixed to the intermediate portion of the protruding side of the support shaft 52 of the dust suction valve 44, and the auxiliary intake port 45 is configured to close in synchronization with the opening operation of the dust suction valve 44.

The interlocking means 47 includes an interlocking arm 54 fixed to the protruding end of the support shaft 51 of the bran suction valve 42, and a distal end of the auxiliary intake valve 46 so as to fit loosely into a guide slot 55 of the interlocking arm 54. An engagement pin 56 protruding outward from the support shaft 5 of the dust suction valve 44
2; and an opening/closing link 60 having one end connected to the intermediate link 57 with a bolt 58 and the other end connected to the valve opening/closing means 49 with a bolt 59. It has become.

Next, the operation of this embodiment will be explained.

The timer 48 is set to excite the valve opening/closing means 49 every 30 minutes, for example.

When the timer 48 is started at the same time as the drive means 29 is started,
With the bran suction valve 42 and the dust suction valve 44 in a closed operation and the auxiliary intake valve 46 in an open operation (see FIG. 6), the whitening roll 14 and the exhaust fan 22 rotate at a normal speed.

The rice in the circulation tank 2 falls from the rice supply port 3 while being diffused in the rice supply direction C, enters the milling roll chamber 4 from the rice receiving port 5, and milling is started by the milling roll 14. At this point, the dust suction valve 44 is closed and the auxiliary intake valve 46 is open, so that no air sorting is performed in the air passage 6, but since the flow passage of the rice bran suction valve 42 is slightly open, a small amount of air is generated. Powdered rice hulls and rice bran are excluded 11 [! It is sucked into the exhaust fan 22 by the negative pressure acting on the lower side of the exhaust fan 1i16.

As the milling process progresses over time, the amount of rice hulls and rice bran peeled off from the rice grains gradually increases, resulting in
When the time reaches 0 minutes, the valve opening/closing means 49 is energized by the timer 48, and at the same time the bran suction valve 42 and the dust suction valve 44 are opened and the auxiliary intake valve 46 is closed, the polishing is performed in state B (see Fig. 7). Processing continues.

Therefore, the rice hulls and the like in the air passage 6 are subjected to air sorting using the air sucked through the air intake holes 12, 12, . On the other hand, a large amount of rice bran and powdered rice hulls peeled off in the milling roll room 4 are sucked from the rice bran removing screen 16 into the suction collection room 23 via the hopper 24 and the rice bran suction duct 25. It merges with the rice hulls etc. mentioned above and exhaust fan 22
The dust passes through the exhaust duct 27 and is collected by the cyclone dust collector 28.

Note that the interlocking means and valve opening/closing means for opening and closing the rice bran suction valve, the dust suction valve, and the auxiliary intake valve are not limited to those described above.

(Effects of the Invention) With the above configuration, the present invention is configured such that the bran suction valve, the dust suction valve, and the auxiliary suction valve provided in the suction collective chamber of the exhaust fan are switched by the suction switching device, and in the initial stage of polishing process. By suppressing the suction force of the exhaust fan and allowing a predetermined period of time to elapse, milling proceeds in a state where there is a large resistance due to the mixture of rice hulls and rice bran, and when the milling state is achieved, the bran suction valve and dust suction valve are opened. Since the rice bran and the rice bran are discharged from the peeled rice, there is an excellent effect that effective whitening processing can be performed.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a central vertical cross-sectional view of a circulating rice mill, FIG. 2 is a front view of the intake air switching device showing an enlarged view of the section ■ in FIG. 1, and FIG. is the same side view, FIG. 4 is a side view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line v-v in FIG. 2, and FIGS. 6 and 7 are operations of the intake air switching device FIG. ↓ Firstly, 1... Circulating rice mill 3... Rice supply port 5... Rice receiving port 16... Bran removal screen 23... Air intake gathering chamber 25... Bran suction duct 41...・Blank suction tube 43...Dust suction tube 45...Auxiliary intake port 47...Interlocking means 49...Valve opening/closing means 2...Circulation tank 4...Refined roll chamber 6...Air passage 22 ... Exhaust fan 24 ... The ridge support is hopper 26 ... Exhaust duct 42 ... Rice bran suction valve 44 ... Dust suction valve 46 ... Auxiliary intake valve 48 ... Timer 50 ... Intake switching Device

Claims (1)

[Scope of Claims] 1) An air passage is provided between the rice grain supply port at the lower end of the circulation tank and the rice grain reception port of the milling roll room for wind sorting out rice hulls, etc.; In the circulation rice polishing machine, a bran receiving hopper is provided through a bran net, and a bran suction duct communicating with the bran receiving hopper and a dust suction duct communicating with the air passage are connected to an intake air collection chamber of an exhaust fan. A rice bran suction valve is provided in a rice bran suction tube that opens from the intake gathering chamber to the rice bran suction duct side, and a dust suction valve is provided in a dust suction tube that opens to the dust suction duct side so as to be openable and closable. An auxiliary intake valve is provided in the formed auxiliary intake port for atmospheric air intake so as to be openable and closable, and interlocking means for opening and closing these bran suction valves, dust suction valves, and auxiliary intake valves is provided, and the interlocking means is operated by a valve opening/closing means equipped with a timer. At the initial stage of milling, the bran suction valve and dust suction valve are closed and the auxiliary intake valve is opened. When a predetermined time has elapsed, this auxiliary intake valve is closed and the rice bran suction valve is opened. An air intake switching device for a circulating rice mill, characterized in that a valve and a dust suction valve can be opened. 2) A part of the bran suction valve is cut out, and this notch allows some air to pass through even when the bran suction valve is fully closed, so that the bran that has fallen into the bran receiving hopper is sucked into the suction collection chamber, and 2. The air intake switching device for a circulating rice milling machine according to claim 1, wherein the air intake switching device is configured to discharge the air.