JPH0798142B2 - Grain mixing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a grain mixing device for mixing grains such as white rice at a predetermined weight ratio.

[Conventional technology]

Regarding this type of conventional grain mixing apparatus, a grain mixing apparatus described in Japanese Patent Application Laid-Open No. 60-150823 filed by the present applicant will be described with reference to FIG. Discharge amount variable discharge valves V _{1 to} V ₅ provided at the discharge ports of a plurality of mixing auxiliary tanks T _{1 to} T ₅ arranged in parallel above the conveyor C, and a volumetric weight measuring device for measuring the volumetric weight of each mixed grain And the volumetric weight of each mixed grain measured by the volumetric weight measuring instrument and the grain mixing ratio input and set by the input means to calculate the respective rotation speeds of the discharge amount variable discharge valve, and the respective mixing reserves. And a calculation control device for discharging grains from the tanks T _{1 to} T _{5 at a} predetermined weight mixing ratio, and the variable discharge amount discharge valves V _{1 to} V ₅ are sequentially operated in a conveying direction of the conveyor C with a time difference. The arithmetic and control unit is contacted to start the operation, and as a result, all the grains discharged from the respective mixing preliminary tanks T _{1 to} T ₅ are conveyed while being merged from the start of discharging to the end of discharging. There is no such thing.

[Problems to be solved by the invention]

By the way, as described above, in the mixing device that discharges a fixed amount based on the volume weight obtained in advance by using the variable discharge amount discharge valve represented by the rotary valve, the weight of the discharged grain is actually measured. Since it is not a thing, there was a difficulty in terms of weighing accuracy. In addition, since it is continuously discharged for a relatively long period of time, the flow rate during discharge changes greatly, and even if the discharge from each tank is completed with the time difference set at the start of discharge, each grain will be accurately polymerized to the end. Without
Mixed spots at the end of discharge were unavoidable.

The present invention provides a grain mixing device in which grains discharged from each tank are uniformly merged and conveyed to the end and the discharge amount from each tank, that is, the mixing ratio is accurate. Subject.

[Means for solving problems]

In order to achieve the above object, in the grain mixing apparatus of the present invention, at the lower end of each grain tank arranged in parallel above the lateral conveying means, according to the grain weight mixing ratio input from the mixing ratio input means. A weighing device is installed to measure and discharge the batches in batches at a fixed amount set by the arithmetic and control unit, and the grains discharged from the transport means at the start of the lot are stored until the end of the lot. A return tank for mixing with the grain is provided on the discharge section side of the conveying means, and a switching valve for guiding the grain to the return tank is provided.

The use of a flow conveyor as the conveying means is effective for mixing grains.

[Action]

The weighing devices provided at the lower ends of the plurality of grain tanks are used to simultaneously measure the quantity into the conveying means by the fixed amount set by the arithmetic control unit according to the grain weight mixing ratio input from the mixing ratio input means.
Although the discharge is repeated to obtain the desired total weight of the grain mixture, one of the grains discharged from each grain tank will be missing at the start and end of the lot due to the simultaneous discharge, so the lot start At this time, the grains discharged from the discharge section of the transportation means are guided to the return tank through the switching valve and stored until the end of the lot, and the grains in this return tank are discharged into the grains just before the end of the lot. Mix.

When the conveying means is a flow conveyor, the conveying piece attached to the endless chain works to stir the grain.

Example of Invention

A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a grain mixing apparatus, and FIG. 2 is a partially enlarged detailed view of FIG.

Measuring devices 6 to 10 are provided at the lower ends of the grain tanks 1 to 5 linearly connected to each other, and a chain 13 and a chain 13 which are rotationally driven by a pair of sprockets 11 to 12 are provided below the measuring devices 6 to 10. A flow conveyor 53 including a large number of scrapers 51 and troughs 52 is horizontally installed. The shaft 15 of one sprocket 11 has a variable speed electric motor 14
Is connected to the end of the flow conveyor 53
16 is erected. Further, receiving ports 55 to 59 for receiving the grains discharged from the weighing devices 6 to 10 are opened on the upper surface wall of the trough 52 of the flow conveyor 53, and a discharge end connected to the supply unit of the grain fried machine 16 is provided at the end of conveyance. Provide an outlet 54.

A grain elevator 17 is erected on the side of the series of grain tanks 1 to 5, and the discharge port of the grain elevator 17 and the inlets 18 to 22 at the upper end of each grain tank 1 to 5 are switched with the chute pipe 23. Connected by valves 24-27. The switching valves 24-27 are provided with air cylinders (not shown) for switching the valves.

Next, the weighing devices 6 to 10 will be described. Grain tank 1
An inner valve 29 and an outer valve 30 are respectively hung by shafts 31 at the outlets 28 at the lower end of the column 5 and connected to the iron cores of the inner valve solenoid 32 and the outer valve solenoid 33, respectively. When these solenoids are excited, the inner valve 29 and the outer valve 30 are formed to pivot upward about the shaft 31 to open the outlet 28. An opening (not shown) for discharging a small amount is formed in the inner valve 29.

A weighing hopper having a discharge port 34 below each outlet 28.
35 is provided, and the weighing hopper 35 is attached via a load cell 36 to a cover 37 provided outside the weighing hopper 35. Then, a dispensing valve 39 which is rotated by a reversible rotation electric motor 38 is attached to the dispensing port 34 of the weighing hopper 35.

The inner valve 29, the outer valve 30, and the payout valve 39 are not limited to actuating the solenoid and the electric motor, and an air cylinder, a cam, a timer and other means are appropriately used.

Inner valve solenoid 32, outer valve solenoid 33, load cell 3 in each of the weighing devices 6 to 10
6, the electric motor 38 and the electric motor 14 of the flow conveyor 53 are connected to an arithmetic control unit 45 including a microprocessor or the like via a drive circuit or the like (not shown), and the arithmetic control unit 45 further includes a display 46 and a printer. 47 and keyboard 48
Be contacted.

Next, the return tank 40 will be described. A dispensing port 41 is provided at the lower end of the return tank 40, a dispensing valve 42 and an electric motor 38 for reversible rotation that drives the dispensing valve 42 are provided at the dispensing port 41, and below the dispensing port 41, an upper surface of a flow conveyor 53. The receptacle 43 opened on the wall is opened. On the other hand, the input port 44 is provided at the upper end of the return tank 40.
The changeover valve 60 and the return chute pipe 61 connect the 44 and the discharge part of the grain elevator 16 to each other, and the changeover valve 60 is further provided with a chute pipe 62 branching to the subsequent process. The switching valve 60 is provided with an air cylinder (not shown) or the like connected to the arithmetic and control unit 45.
Are formed to switch.

The specific operation of the above embodiment will be described below. Grains tanks 1 to 5 are sequentially loaded in advance with grains of different varieties and different qualities, for example, polished rice grains, through a grain lifting machine 17, a chute pipe 23 and switching valves 24-27 in advance. In some cases, the drive circuit of the air cylinder for switching the switching valves 24 to 27 is connected to the arithmetic and control unit 45, and is automatically extended based on the extension instruction signal input from the keyboard 48.

Next, based on the shipping or stock plan, the desired mixing ratio and total weight are input from the keyboard 48 in order to mix the rice grains in each grain tank 1-5. For example, the total weight
If W ₀ and the weight mixing ratio of each grain tank 1 to 5 are specified as 3: 2: 1: 1: 3, the weight W _{1 to} W ₅ to be discharged from each grain tank 1 to ₅ is W ₁ = the _{3W 0/10 W 2 = 2W} 0/10 W 3 = W 0/10 W 4 = W 0/10 W 5 = 3W 0/10. Then, in response to a weighing start signal from the arithmetic and control unit 45, the weighing devices 6 to 10 simultaneously start weighing. That is, the inner valve solenoid 32 and the outer valve solenoid 33 are excited and the inner valve solenoid 32 is excited.
By pulling up 29 and the outer valve 30 and opening the outlet 28, the rice grains in the grain tanks 1 to 5 respectively flow into the weighing hopper 35. That is, the rice grains in the grain tanks 1 and 5 having the largest mixing ratio are weighed by 30 Kg each when the weighing device has a weighing capacity of 30 Kg.
The amount of rice grains inside is 2/3, which is 20 kg each, and the amount of rice grains in grain tanks 3 and 4 is 10 kg, which is 1/3 of that.
Then, the weight of rice grains in each weighing hopper 35 is measured by the load cell 36, and when the load cell 36 detects 1 Kg or less of a predetermined weight (quantity), the inner valve solenoid 32 is demagnetized and the inner valve 29 moves downward. Then, when rice grains flow out little by little through the opening of the small amount discharge port provided in the inner valve 29 and reach a predetermined weight, the solenoid 33 for the outer valve is demagnetized and the outer valve 30 moves downward, and the outlet port is opened.
28 closes. When the weighing is completed in this way and the time required for one weighing (time required for weighing 30 kg + α), for example, 6 seconds, is counted up, the electric motor 38 is rotated and the dispensing valve
39, the weighed rice grains are simultaneously dispensed from each dispensing port 34 into the flow conveyor 53, the dispensing valve 39 is closed after a predetermined time (several seconds) elapses, and the inner valve 29 and the outer valve 30 are again moved upward. Then, the next measurement is started. Therefore, the so-called payout interval is several seconds for payout and 6 seconds required for weighing.

In the present embodiment, the measurement is performed with an accuracy of about ± 2 g depending on the large amount and the small amount, but this is referred to as the large amount, the medium amount, and the small amount.
Further, there is a case where the accuracy is further improved by combining these large, medium and small charges depending on the measured weight.

FIG. 3 shows that when the distance between the grain tanks is l and the payout interval is t, the rotation speed of the electric motor 14 is adjusted and the transport speed ν of the flow conveyor 53 is adjusted.
Is an example of a mixture of 5 types when ν is calculated as υ = 1 / t. The rice grains (= A) discharged from the discharge port 54 in the first four batches are not mixed by being polymerized in all varieties, and all varieties are mixed in from the fifth batch. Therefore, the rice grains A discharged in the first four batches are discharged from the discharge port 54, fried by the fried machine 16 and temporarily stored in the return tank 40 via the switching valve 60 and the chute pipe 61. And this A is a switching valve
After passing through 60, the switching valve 60 is switched and B mixed with all kinds is conveyed to the subsequent process through the chute pipe 62.
The timing of switching the switching valve 60 is when the 30 kg of rice grains (circled in the figure) discharged from the grain tank 1 in the first batch reach the switching valve 60, that is, the time t from the start of the lot.
Is the distance from the grain tank 1 to the outlet 54 (4l +
L), where T is the time for frying in the grain lifting machine, then t = (4l + L) / v + T.

In this way, the weighing and discharging from the weighing devices 6 to 10 are continued and all the varieties are mixed and conveyed to the next process. The weight W ₁ to be discharged from the grain tanks 1 to 5
When each ~ W ₅ is discharged, weighing and discharging stop at the same time.
When the discharge from the grain tanks 1 to 5 is stopped, the rice grains (= C) discharged in the final 4 batches are not mixed in all varieties, so this is mixed with A for the first 4 batches. That is, the time t from the end of the last batch until the mixture immediately below the grain tank 4 reaches immediately below the return tank 40 is the distance between the grain tank 4 and the return tank 4.
If it is set to 2 l, it is calculated from t = 2l / υ, and after t seconds from the final batch, the electric motor 38 of the return tank 40 is driven to open the discharge valve 42. Although the rice grain A in the return tank 40 is discharged when the dispensing valve 42 is opened, the dispensing port 41 is formed slightly narrower, and 30 kg of rice grains in the grain tank 1 which is the final batch is returned to the return tank. By continuing the discharge until it reaches just below 40, the first 4 batches of rice grain A and the final 4
The rice grains C for the batch are evenly polymerized and thoroughly mixed until the end.

FIG. 4 shows an example of mixing five types when the transport speed of the flow conveyor 53 is doubled in the above embodiment. In this case, all the varieties do not overlap, the adjoining polymers are combined (E), the first end portion (= D) of the lot is stored in the return tank 40, and this D is finalized. (F) is polymerized and mixed. In this case, the faster the transport speed of the flow conveyor 53 is, the earlier the switching valve 60 and the payout valve 42 are operated.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

A weighing device is installed at the lower end of each grain tank, and the weight of the discharged grain is actually weighed to measure the grain with extremely high accuracy, and the batch is weighed and discharged, so there is no error in the discharge flow rate. , Accurate mixing can be done and the counting control of grains becomes easy. Then, the grain at the start of the lot is stored in the return tank, and this grain is mixed with the grain just before the end of the lot. It becomes the grain blended at the mixing ratio.

Further, by using a flow conveyer as the conveying means, a stirring action occurs and mixing can be effectively performed.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of the present invention, FIG. 2 is a partially enlarged detailed view of FIG. 1, FIG. 3 is an explanatory view showing a mixing example, and FIG. 4 is an explanatory view showing another mixing example. FIG. 5 is a schematic view showing a conventional example. 1-5 ... Grain tank, 6-10 ... Measuring device, 11-12 ... Sprocket, 13 ... Chain, 14 ... Electric motor, 15 ... Shaft, 16-17
… Lifting machine, 18-22… Input port, 23… Shoot pipe, 24-
27 ... Switching valve, 28 ... Outflow port, 29 ... Inner valve, 30 ... Outer valve, 31 ... Shaft, 32 ... Inner valve solenoid, 33 ... Outer valve solenoid, 34 ... Discharge port,
35 ... Weighing hopper, 36 ... Load cell, 37 ... Cover, 38 ...
Electric motor, 39 ... Discharge valve, 40 ... Return tank, 41 ... Discharge port, 42 ... Discharge valve, 43 ... Receiving port, 44 ... Input port, 45 ... Arithmetic control unit, 46 ... Indicator, 47 ... Printer, 48 ... Keyboard , 51 ... scraper, 52 ... trough, 53 ... flow conveyor, 54 ... discharge port, 55 to 59 ... receiving port, 60 ... switching valve, 61, 62 ...
Shoot pipe.

Claims (2)

[Claims] 1. A plurality of grain tanks are arranged side by side above a transporting means for transporting grain in a substantially horizontal direction at a constant speed, and a fixed amount of grain in each grain tank is batched in batches at the lower end of each grain tank. Providing a weighing device for weighing and discharging,
Furthermore, in a grain mixing apparatus provided with an arithmetic and control unit for quantitatively setting each weighing device in accordance with the grain weight mixing ratio inputted from the mixing ratio input means, at the start of a lot, discharge from the discharge part of the conveying means. A return tank for temporarily storing the grain and mixing it with the grain just before the end of the lot,
A grain mixing apparatus, characterized in that it is provided on the discharge side of the conveying means and is provided with a switching valve for guiding grain to this return tank. 2. The grain mixing apparatus according to claim 1, wherein the conveying means is a flow conveyor.