JPS58158208A - Method of controlling quantity of material for batcher plant charged - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims at averaging the amount of mixer crosstalk when the ready-mixed concrete produced in a batch plant is divided into multiple batches and supplied to a transport vehicle such as a ready-mixed concrete truck. This invention relates to a method for controlling the amount of material input in a batch plant, which can level out measurement management by controlling the amount of input material according to the amount, improve mixer operating efficiency, and ensure smooth operation of the sriracha plant. .

In general, the maximum amount of crosstalk per batch, that is, the maximum supply amount of a mixer installed in a batch plant that mixes and supplies materials such as cement and aggregate, is small compared to the loading capacity of the transport vehicle, and the mixer is divided into multiple batches. fresh concrete shall be supplied. However, the maximum supply amount of the mixer and the loading capacity of the transport vehicle are independent quantities, and the transport vehicles have various loading capacities, so it is not possible to unambiguously correlate them.

Conventionally, the feed rate of ready-mixed concrete, which is the mixer's mixer flow rate, is given a set feed rate that is set in advance in steps according to a predetermined numerical range within the range of the maximum supply rate.
These supply amounts are controlled by the amount of material input into the mixer.

When supplying ready-mixed concrete according to the loading capacity of one transport vehicle, the maximum supply rate and the set supply rate are combined in order to minimize the number of times the mixer is operated. Ta. For example, 1.5m”
0 to the mixer with the maximum crosstalk amount, that is, the maximum supply amount.
．． When the supply amount is set with a numerical width of 5 m'', the set supply amount is 0.5 ms and 10 m8, and such a mixer is used to supply it to a transport vehicle with a loading capacity of 5.5 rrLs. In some cases, the maximum supply amount is 1.5 m
"3 times, and the remaining amount is supplied once at 1.07 Fl'.

By the way, in the above conventional example, the supply amount of ready-mixed concrete is limited to the combination of the preset supply amount and the maximum supply amount, and the numerical range is also set to be larger than the maximum supply amount of the mixer. In order to avoid this problem, the amount supplied each time is greatly varied, and the amount of input material is varied as much as possible, making the measurement and management of materials complicated. In order to deal with this, it is possible to set a smaller range of numerical values, but setting the set supply amount finely is simply to diversify the combinations. Its effectiveness is hardly recognized for the produced transport vehicles.

The present invention has been devised in view of the above-mentioned conventional problems and to effectively solve them.

The purpose of the present invention is to average the amount of mixer crosstalk and manage the amount of crosstalk by dividing the loading capacity of the transport vehicle by the maximum crosstalk amount of the mixer and controlling the amount of material input to the mixer so as to obtain an integer. It is an object of the present invention to provide a method for controlling the amount of material input into a batcher plant, which can level the amount, improve mixer operating efficiency, and ensure smooth operation of the batcher plant.

Next, a preferred embodiment of the device employed in the method for controlling the material input amount of a batcher plant according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in Fig. 1, a building 2 is formed on the outside of the batcher plant 1 to cover the entire plant, and inside this building 2, from the top 3 to the bottom 4, there is a tank for producing ready-mixed concrete. The following devices are successively installed.

The top portion 3 is provided with a material supply facility 28 for feeding materials such as aggregates carried in from a storage facility (not shown) into a material measuring device 8 (to be described later). Reference numeral 6 denotes a material sorting and dropping device for dropping materials into storage bins 5 arranged below in parallel according to their types. At the bottom of the storage bin 5..., there is a container for storing the dropped material into the storage bin 5... and for feeding a predetermined amount of material into the material measuring device 8... arranged in parallel below. On-off valve 9 for controlling the amount of material dispensed...
is provided.

On the other hand, the batcher plant 1 is provided with material supply equipment 29 for supplying water and admixtures.

This equipment 29 includes a storage tank 24 provided outside the building 2 for storing water and an admixture, and supplies water and an admixture from the storage tank 24 to a measuring device 8'. It consists of a pump 7... for controlling the supply amount, and an on-off valve 9' for controlling the amount of material input to adjust the supply amount, and a measuring device 8'.
··It is connected to the. These measuring instruments 8..., 8'...
... is provided with weight detection means 10 such as a load cell in order to detect the weight of material A... inputted from the material supply equipment 28, 29, and these weight detection means 10 ...
A comparison section 20 of the control panel 16, which will be described later, is connected to the control panel 16.

In addition, at the bottom of these measuring instruments 8..., 8'...
Opening/closing of the reservoir for temporarily storing the input material in the measuring devices 8..., 8'... and dropping the weighed material into the mixer 12 provided below via the chute 11... Valves 13..., 13' are provided. This mixer 12
is configured with a predetermined maximum mixing amount B in order to knead the dropped materials and produce ready-mixed concrete.

By the way, as shown in the figure, a control chamber 15 is formed outside the mixer 12 with a partition wall 14 in between.
A control panel 16 that monitors and controls the operating state of the batcher plant 1 is installed inside the plant 5 . This control panel 16 includes
As shown in FIG. 2, there is an on-vehicle setting section 17 that mainly sets the on-board capacity C of the transport vehicle, a maximum supply amount setting section 18 that sets the maximum amount of crosstalk at one time of the mixer 12, that is, the maximum supply amount B; The material supply equipment 28.2 calculates the number of times of supply N and its supply amount by calculating the on-vehicle capacity C and the maximum supply amount B connected to and set, and also according to the preset blending ratio α.
9 to the measuring instruments 8..., 8'..., and a computing section 19 that calculates the individual material input amounts E... connected to this and calculated, and the calculated individual material input amounts E... Measuring device 8...
, 8'... are compared with the actual material weight A supplied from the weight detection means 10..., and the on-off valves 9..., 9'... for controlling the material input amount are adjusted. A controlling comparison section 20 is provided. Further, a control section 21 is connected between the calculation section 19 and the comparison section 20, which instructs a series of operations from material input by the material supply equipment 28, 29 to supply of ready-mixed concrete to the transport vehicle. Furthermore, in the comparison section 20,
Display sections 22 and 23 are connected to display the set material input amount E and the actual material weight A to be visually checked by the driver and the like.

Further, a concrete hopper 26 facing the mixer 12 is provided below the mixer 12 and is open at the top, and a concrete hopper 26 is provided below the mixer 12 for supplying ready-mixed concrete to a transport vehicle (not shown) disposed at the bottom 4 of the batcher plant 1. gate valve 2
7 is provided.

The method for controlling the amount of material input into a batcher plant according to the present invention will be described in more detail based on the above-described specific device example.

As shown in FIGS. 1 and 2, when operating the batcher plant 1, first, the on-vehicle capacity C of the transport vehicle placed at the bottom 4 of the building M2 and the maximum supply amount B of the mixer 12 are determined by the on-vehicle setting section, respectively. 17 and maximum supply amount setting section 18 . These set amounts B and C are supplied to the arithmetic unit 19, and arithmetic processing as shown in FIG. 3 is performed. Initially, in the first stage, the on-vehicle amount C is divided by the maximum supply amount B in order to obtain the number of times n of supply from the mixer 12 to the transport vehicle. At the n-th stage, in order to convert the number of times of supply n into an integer, a calculation is performed to round up the number of times of supply so that the amount of one time of supply does not exceed the maximum supply amount B of the mixer, thereby obtaining the true number of times of supply N.

However, if an integer is obtained in the first stage, n matches the true number of supplies N without changing it. In stage (2), the on-vehicle amount C is divided by the true number of times of supply N, and the averaged amount of supply D for each supply time is obtained with a predetermined number of significant digits. In the third stage, the supply amount D... obtained in this way is
Supply amount DI ~ DN-1 from the time to the (N-1)th time
Set as . In the v-th stage, from the vehicle load C to the (N-1th)
) by subtracting the total supply amount (DX(N-1)) up to the Nth supply amount DN.

In this way, it is possible to correct the fractions rounded down in the second stage. Further, the fraction included here is very small, and the Nth supply amount DN and each previous supply amount are approximately DN#D.

In the third stage, each supply quantity or DN set in this way is
By multiplying by a preset blending ratio α, the material film and amount E of each material are set. At this time, since the supply amounts D1 to DN for each supply cycle are averaged, the individual material input amounts E... can also be kept approximately constant for each supply cycle, and measurement management can be leveled out. .

Once these material input amounts E... have been obtained, the control section 21 is closed and the work of producing ready-mixed concrete is proceeded for each feeding cycle, as shown in FIG. First, the on-off valves 9, 9', . . . for controlling the amount of material input are opened, and materials are input from the material supply equipment 28, 29 to the measuring devices 8, . At this time, the material weight A... is always fed back to the comparison section 20 by the weight detection means 10.... In the comparison section 20, when the control section 21 is closed, the material input amount E for each supply time is set,
These set input amount E... and the actual material weight A.
Comparing with..., material input amount control on-off valve 9...,
9'... will be controlled. If the input amount E... and the material weight A... match, the on-off valve 9...,
9'... is closed. The weighed materials are fed into the mixer 12 via the on-off valves 13..., 13'... and the chute 11, and are kneaded to produce ready-mixed concrete. The ready-mixed concrete is then dropped into the concrete hopper 26 and supplied to the transport vehicle via the gate valve 27 as a single supply amount. These operations are performed from the first to the Nth time by opening and closing the control unit 21.
By repeating this process up to the third time, the supply to one transport vehicle is completed. Thereafter, similar operations can be continued for transport vehicles with different loading capacities.

In this way, the material input amount control method according to the present invention allows the supply amount D1 to D1 to
By averaging the DN, it is possible to uniformly control the material input amount E, achieve equalization of measurement management, and achieve smooth operation of the batcher plant 1.

Furthermore, when producing products with various characteristics by changing the mixing ratio of cement, aggregate, etc., the maximum supply amount B of the mixer 12 can be arbitrarily set from the control panel 16 according to the product. It is possible to adjust the amount of material input E... and to improve the operating efficiency of the mixer 12 as much as possible.

In summary, the present invention exhibits the following excellent effects.

(1) The number of times of supply obtained by dividing the loading capacity of the transport vehicle by the maximum supply rate of the mixer is converted into an integer, and by dividing the loading capacity by this, the supply rate of each supply time is averaged. It is possible to uniformly control the input amount, level out the measurement management, and achieve smooth operation of the batcher plant.

(2) When producing ready-mixed concrete with various properties by changing the blending ratio of cement, aggregate, etc., the maximum supply amount of the mixer can be arbitrarily varied, and the amount of material input can be adjusted depending on the product. Thus, the operating efficiency of the mixer can be improved as much as possible.

[Brief explanation of drawings]

FIG. 1 is a side cross-sectional view showing a batcher plant which is an example of a device for specifically implementing the present invention, FIG. 2 is a configuration diagram showing the configuration of a control panel provided therein, and FIG. 3 is a diagram showing the configuration of a control panel provided therein. FIG. 2 is a system diagram showing a method for controlling the amount of material input from a hopper to a mixer in a batcher plant. In the figure, 8 and 8' are measuring instruments illustrated as measuring tanks, and 12
is a mixer, 28 and 29 are material supply equipment, B is the maximum supply amount, C is the onboard capacity, E is the material input amount, and N is the number of times of supply.

Claims (1)

[Claims] It has a measuring tank that receives and stores materials such as cement and aggregate from the material supply equipment, and is equipped with a mixer that kneads the materials inputted from the measuring tank to produce ready-mixed concrete, and transports the materials from the mixer to the transport vehicle. In a batcher plant that supplies the above-mentioned ready-mixed concrete in multiple parts, in order to obtain the number of times of supply from the above-mentioned mixer, the loading capacity of the above-mentioned transport vehicle is divided by the maximum amount of crosstalk of the above-mentioned mixer at one time, and an integer is obtained. A method for controlling the amount of material input into a batcher plant, characterized in that the amount of material input into the mixer is controlled.