JPH0245494B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a grain mixing device for mixing grains, such as polished rice, in a predetermined weight ratio.

[Prior art]

In a mixing device that is equipped with quantitative discharge means at the discharge ports of multiple preliminary mixing tanks and discharges grain from each tank at an arbitrary mixing ratio, discharge from each tank is started simultaneously onto a conveyor and the discharge is completed within a certain period of time. When mixing by mixing, the discharge ports of the plurality of preliminary mixing tanks are provided at intervals above the top surface of the conveyor, so uneven mixing inevitably occurs at the start and completion of discharge. be. In other words, as shown in Fig. 3, after all tanks start discharging at the same time,
While the grains discharged from T ₁ reach the lower part of the outlet of tank T ₅ at the end of the conveyor, the mixture is significantly non-uniform as not all the grains from each tank are combined, and the mixture is further stirred. This caused problems such as the need for additional equipment.

[Purpose of the invention]

In view of the above, the present invention provides a mixing device that is capable of uniformly merging and conveying all the grains from beginning to end, and that can consistently perform predetermined uniform mixing by controlling the discharge amount from each mixing reserve tank. The purpose is to provide

[Structure of the invention]

The grain mixing device of the present invention includes a plurality of preliminary mixing tanks arranged in parallel above the conveyor, a variable discharge discharge valve provided at the discharge port of each of the preliminary mixing tanks, and a grain mixing ratio that is input. It is comprised of an arithmetic and control device that calculates the rotational speed of each of the variable discharge volume discharge valves and discharges the grain from the mixing reserve tank at a set weight mixing ratio, and the variable discharge volume discharge valves are configured to rotate in the direction of conveyance of the conveyor. This configuration is characterized in that the arithmetic and control unit is contacted to start operating at different time intervals.

[Function] As a result, the grains in each preliminary mixing tank are discharged for a certain period of time at a flow rate according to the mixing ratio by the variable discharge valve which is driven at a rotation speed according to the grain mixing ratio. However, the discharge valves start operating at different times with respect to the conveyance direction of the conveyor, and all the grains are conveyed in an overlapping state from beginning to end.

Additionally, if a volumetric weight measuring device is installed, it is possible to discharge grains at a more accurate weight ratio based on the volumetric weight of each grain and the discharge volume per revolution of the discharge valve, depending on the difference in grain volumetric weight. .

〔Example〕

Hereinafter, preferred embodiments of the grain mixing device of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing an embodiment of the grain mixing device of the present invention. 1 is the mixing reserve tank T ₁ ~
This is a volumetric weight measuring machine that measures the volumetric weight of each grain loaded into _T5 . 2 and 4 are grain lifting machines, 3 is a conveyor,
_B1 to _B5 are variable discharge valves that can control the amount of grain discharged from each tank, which are installed at the discharge ports of the preliminary mixing tanks _T1 to _T5 , such as solid rotary valves operated by a pulse motor. be. 5 is an arithmetic control unit consisting of a microprocessor, etc., which is connected to the volumetric weight measuring device 1 and variable discharge volume discharge valves B ₁ to _{B 5} ; 6 is a display; 7 is a printer; 8 is a desired grain mixture. This is a keyboard for inputting ratios.

Next, the operation of the above embodiment will be described.

The grains whose volumetric weight, which is the weight per unit volume of each grain of different quality, has been measured through the volumetric weight measuring machine 1 are sent to mixing reserve tanks T ₁ to _{T 5} for each grain via the grain lifting machine 2. The volumetric weight of each grain measured by the volumetric weight measuring device 1 while being loaded is stored in the storage section of the arithmetic and control unit 5 for each grain.

In this way, grains of different quality are filled in the preliminary mixing tanks T ₁ to _{T 5} respectively, and the arithmetic and control unit 5
, the volumetric weight of the grains loaded into each of the preliminary mixing tanks T ₁ to _{T 5} is stored. Next, in order to mix these grains of different quality, when a desired mixing ratio and total weight are input from the keyboard 8, the arithmetic and control unit 5 selects each mixing reserve tank T ₁ from the stored volumetric weight of each grain. ~ Calculate the rotation speed of the discharge valves B ₁ ~ _{B 5} of T ₅ . That is, the total weight is W ₀ , and the mixing weight ratio of each preliminary mixing tank T ₁ to T ₅ is, for example, mixing preliminary tanks T ₁ :T ₂ :T ₃ :T ₄ :T ₅ =1:2:3:4: 5, each mixing reserve tank T ₁ to _{T 5}
The respective discharge weights W ₁ to W ₅ from W ₁ = W ₀ /15, W ₅ = 2W ₀ /15 W ₃ = 3W 0 /15, W ₄ = 4W _{0 /} 15 W ₅ = 5W ₀ /15 ...(1) becomes. And 1 of variable discharge valves B ₁ to B ₅
Let the discharge capacity per revolution be V, and the volumetric weight of each grain filled in each of the preliminary mixing tanks T ₁ to _{T 5} and stored in the storage section of the arithmetic and control unit 5 are respectively w ₁ to
When w is ₅ , the rotation speed of each discharge valve C ₁ to C ₅ is n ₁ to
n ₅ becomes as follows.

n ₁ = W ₀ / (V・w ₁ ) = W ₀ / (15・V・w ₁ ) n ₂ = W ₁ / (V・w ₂ ) = 2W ₀ / (15・V・w ₂ ) n ₃ = W ₃ / (V・w ₃ ) = 3W ₀ / (15・V・w ₃ ) n ₄ = W ₄・(V・w ₄ ) = 4W ₀ / (15・V・w ₄ ) n ₅ = W ₅ / (V・w ₅ ) = 5W ₀ / (15・V・w ₅ ) ...(2) The arithmetic and control unit 5 calculates the above equation (2),
The motor that rotates each of the discharge valves B ₁ to _{B 5} is driven to rotate each of the discharge valves by the calculated total number of rotations _{n 1 to n 5 .} , Also, by the arithmetic and control unit 5,
Control is performed to start driving after a certain period of time has passed. In other words, when the grain discharged from the variable discharge volume discharge valve _B1 provided at the discharge port of the mixing reserve tank _T1 (see Fig. 2) reaches the position immediately below the variable discharge volume discharge valve _B2 , said valve B ₂ starts draining,
Similarly, as the grain progresses on the conveyor 3,
The arithmetic and control unit 5 controls the discharge valves B ₃ , B ₄ , and B ₅ so that when the discharge valves B ₃ , B ₄ , and B ₅ reach the position immediately below each discharge valve, the valves B 3 , B 4 , and B 5 sequentially delay and start discharging. From the respective distances between the variable volume discharge valves B ₁ to B ₅ and the speed of the conveyor 3, the valves B ₁ to B 5 are
B ₅ is configured to calculate the operating time difference,
Each of the valves B ₁ to _{B 5} starts operating with the difference in operating time, and rotates for the same period of time at the number of revolutions calculated by the above equation (2).

Now, the intervals between the discharge ports of each preliminary mixing tank T ₁ to T ₅ are all 1, and the speed of the conveyor 3 is s.
Then, the difference in operating time of discharge valves B ₁ to _{B 5} from the start of discharge of discharge valve B ₁ is B ₂ ...
l/s, B ₃ …2・l/s, B ₄ …3・l/s, B ₅
...4.l/s.

Then, at the end of discharge, the discharge is completed sequentially from variable discharge valve B ₁ to B ₅ through the same time difference as at the start of discharge, so that the reserve mixing tank
All of the grains discharged from T ₁ to _{T 5} are overlapped and merged until the end, and conveyance is completed at the same time by the conveyor 3, and transferred to the next process via the grain lifting machine 4.

〔Effect of the invention〕

As described above, according to the grain mixing device of the present invention, by simply inputting the total weight of mixed grains and the desired weight mixture, grains with a uniform weight mixing ratio from beginning to end can be discharged from the plurality of preliminary mixing tanks. Of course, there is a time difference in the start of discharging from each preliminary mixing tank, and all the discharged grains are conveyed by the conveyor while merging together, eliminating uneven mixing at the start and end of discharging from the preliminary mixing tank. This allows grains to be mixed with uniform quality. This makes grain counting management easier, and mixing can be achieved simply by discharging grain from each tank.
Does not require special stirring equipment for mixing.

In addition, if a volumetric weight measuring device is installed, it is possible to discharge at a more accurate weight ratio according to the difference in volumetric weight of each grain based on the volumetric weight of each grain and the discharge volume per revolution of the discharge valve, and it is possible to discharge the grain at a more accurate weight ratio from beginning to end. to ensure uniform mixing.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the grain mixing device of the present invention, and FIG. 2 is an explanatory diagram when grain mixing is performed using the grain mixing device of the present embodiment.
FIG. 3 is an explanatory diagram when mixing is performed using a conventional grain mixing device. 1... Volumetric weight measuring machine, 2, 4... Grain lifting machine, 3... Conveyor, 5... Arithmetic control unit, 6... Display, 7... Printer, 8... Keyboard, T ₁ to T ₅ ... Mixing reserve tank, B ₁ ~B ₅ ...Variable discharge valve.

Claims (1)

[Scope of Claims] 1. A plurality of preliminary mixing tanks arranged in parallel above the conveyor, a discharge variable discharge valve provided at the discharge port of each preliminary mixing tank, and a variable discharge amount according to the input grain mixing ratio. and an arithmetic and control device that calculates the rotational speed of each variable discharge valve and discharges the grain from the mixing preliminary tank at a set weight mixing ratio, the variable discharge amount discharge valve comprising:
The grain mixing device is characterized in that the grain mixing device is connected to the arithmetic and control device so as to start operating at a sequential time difference with respect to the conveyance direction of the conveyor. 2. The grain mixture according to claim 1, further comprising a volumetric weight measuring device for measuring the volumetric weight of each mixed grain so that the rotational speed of each of the variable discharge valves is calculated based on the grain mixing ratio and volumetric weight. Device.