JPH01285310A - Automatic supply and mixing device for mixing agent - Google Patents

Abstract

PURPOSE:To hold a mixing ratio constant between a main material and mixing agent, by a method wherein opening and closing of a solenoid valve fitted to a mixing agent supply pipe connecting between a mixing agent supply pump and mixing device and a discharge amount control device of the mixing agent supply pump are controlled with a command of a computer processing on an input data from flow meters each. CONSTITUTION:When a concrete pressure feed pump 1 is actuated, a computer 10 detects a flow of concrete based on an input data from a concrete flow meter 7, a control signal is sent to a solenoid valve 6 and the same solenoid valve 6 is opened. Simultaneously with this the computer 10 processes on input data from a quick binding agent flow meter 8 and the concrete flow meter 7. Discharge amount of a quick binding agent with a quick binding agent supply pump 2 is controlled by sending a command to a control device 9 so that a fixed mixture ratio is obtained, through which the mixture ratio between the concrete and quick binding agent is made constant. When the concrete pressure feed pump 1 is stopped, data of a flow zero is applied to the computer 10 from the concrete flow meter 7 and the solenoid valve 6 is closed.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an automatic admixture supply and mixing device for supplying and mixing an admixture such as a quick-setting agent to concrete being pumped. .

(Prior art) Conventionally, regarding a pump for supplying an admixture to be used in advance,
Set the indicator needle at an appropriate position on the scale plate of the pump force adjustment device, and change the scale to the 0th order to actually measure the amount of admixture discharged from the supply port corresponding to the scale value using a measuring cylinder, etc. The discharge amount at that time is measured in the same manner. Based on the data obtained by repeating this procedure several times, a calibration table is created by plotting the relationship between the discharge amount and the scale value on a graph.

When actually supplying the admixture, read the pump's capacity adjustment scale from the admixture discharge amount on the calibration table so that the specified mixing ratio matches the pumping capacity of the concrete pump being used, and place the indicator needle on that scale. I used a rough method of setting up the pump and operating the pump.

(Issue 1fi to be Solved by the Invention) However, the conventional method has the following problems.

i) It is not possible to supply an amount of admixture that keeps up with fluctuations in the amount of pumped main material.

ii) A problem arises when the accuracy of the supply amount is poor and the properties of the main material change greatly due to a slight quantitative difference.

iii) Calibration tables must be created each time depending on the pump used, which is cumbersome.

The present invention was devised in view of the problems of the prior art, and its purpose is to automatically and highly accurately dispense an amount of admixture that follows the fluctuations in the amount of pumped main material. The present invention provides an automatic supply mixing device for admixtures.

(Means for Solving the Problems) In order to achieve the above object, the automatic admixture supply mixing device according to the present invention includes a flow meter that detects the pumping amount of the main material;
a flowmeter that detects the amount of admixture supplied; a computer that performs arithmetic processing based on input data from both flowmeters; and a solenoid valve that is interposed in the admixture supply pipe and opens and closes according to instructions from the computer; The apparatus includes a pump control device that controls the discharge amount of the admixture supply pump so that the mixing ratio of the main material and the admixture is constant according to instructions from the computer.

(Function) Since the present invention is configured as described above, when the combination machine detects the flow of the main material based on the input data from the flow meter that detects the amount of pumped main material, the admixture supply pipe is immediately An interposed solenoid valve is opened, and at the same time a flow meter detects the amount of pumped main material and the amount of admixture supplied? The computer calculates the mixing ratio of the admixture based on input data from the Rii, issues a command to the control device to achieve a predetermined mixing ratio, and controls the discharge amount of the admixture supply pump by the control device. Then, the admixture is supplied to the mixing device so that the mixing ratio with the main material is always constant.

(Example) The illustrated example in which the present invention is applied to an automatic supply mixing device for supplying an accelerating agent as an admixture to concrete as a main material will be described below.

In Figure 1, (1) is a concrete pressure pump, (
2) is an quick-setting agent supply pump, and the concrete pressure feed pipe (3) and quick-setting agent supply pipe (4) connected to the discharge side of each pump (1) and (2) are connected to the mixing device (5). The concrete and the quick setting agent are mixed in the same mixing device (5).

Furthermore, a solenoid valve (6) is interposed in the quick-setting agent supply pipe (4).

(7) is a flowmeter for detecting the amount of concrete pumped, which is disposed on the discharge side of the concrete pressure pump (1), and an electromagnetic flowmeter, a Doppler flowmeter, or the like is used.

In addition, a method of converting the amount of concrete pumped from the rotation speed of the concrete pump drive unit is adopted.

(8) is a flowmeter that detects the supply amount of the quick setting agent, and an electromagnetic flowmeter, a positive displacement flowmeter, etc. are used.

(9) is a control device for the quick setting agent supply pump (2), which changes the stroke and rotational speed of the pump and adjusts the discharge amount of the pump, and is composed of an electric servo, an inverter, and the like.

0ω is calculated by a computer based on the input data from both the flowmeters (7) and (8), and the solenoid valve (6)
and issues control commands to the control device (9).

Since the illustrated embodiment is configured as described above, when the concrete pressure pump (1) is operated, the computer Qff) detects the flow of concrete based on the input data from the concrete II meter (7), A control signal is issued to the solenoid valve (6) to open the solenoid valve (6).

At the same time, the computer 0ω calculates based on the input data from the quick-setting agent flowmeter (8) and the concrete flowmeter (7), and controls the control device (9) so that a predetermined mixing ratio is achieved.
) to adjust the amount of quick-setting agent discharged by the active agent supply pump (2) so that the mixing ratio of concrete and quick-setting agent is always constant.

Also, when the concrete pressure pump (1) stops, the concrete flow meter (7) informs the computer 00) of the flow rate.
data is input, and the solenoid valve (6) is closed.

FIG. 2 is a control flow diagram of the automatic admixture supply mixing device shown in the above embodiment.

(Effects of the Invention) According to the present invention, as described above, the amount of the main material pumped by the main material pump and the amount of admixture supplied by the admixture supply pump are detected by each flowmeter, and Based on instructions from a computer that performs arithmetic processing based on input data, the opening and closing of the @magnetic valve installed in the admixture supply pipe connecting the admixture supply pump and the mixing device are controlled, and the discharge of the admixture supply pump is controlled. By configuring the amount control device to control the amount, even if the pumped amount of the main material fluctuates, the corresponding amount of admixture can be automatically supplied to the mixing device, so that the main material and admixture are always maintained. The mixing ratio can be kept constant.

Furthermore, by using a flowmeter, highly accurate measurement can be performed, unlike conventional rough measurement.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an outline of an embodiment of an automatic admixture supply/mixing device according to the present invention, and FIG. 2 is a control flow diagram thereof. (1) - Concrete pressure pump (2) - Rapid setting agent supply pump (3) - Concrete pressure pipe (4) - Rapid setting agent supply pipe (5) - Mixing device (6) - Solenoid valve (7
)・-Flowmeter to detect the amount of concrete pumped (8)-
・Flow meter (9) that detects the supply amount of quick-setting agent - Control device for quick-setting agent supply pump 0ω...Computer agent Patent attorney Shige Okamoto 2 other people

Claims (1)

[Claims] In an admixture supply mixing device, which is composed of a main material pressure pump, an admixture supply pump, and a mixing device connected to both pumps via a main material pressure feed pipe and an admixture supply pipe, the amount of main material pumped is controlled. A flow meter for detecting the amount of admixture supplied, a computer for performing calculation processing based on the input data from both flow meters, and a computer installed in the admixture supply pipe, and according to instructions from the computer. An admixture comprising a solenoid valve that opens and closes, and a pump control device that controls the discharge amount of the admixture supply pump so that the mixing ratio of the main material and the admixture is constant according to instructions from the computer. automatic feeding mixing device.