KR100476546B1 - An Apparatus for Controlling Concentration of Releasing Solution by Using Load-cell - Google Patents

Abstract

The present invention relates to a control device for automatically adjusting the use concentration of the release solution (releasing solution) used in the rubber compounding apparatus, in the stirring tank (5), the stock solution, cooling water (9) and steam (10) In the apparatus for adjusting the concentration of the release solution mixed with each other,

A load cell 21 mounted below the solution stirring vessel 5; A computer 24 for entering concentration conditions of the release solution; A PIL 23 connected to the computer 24 for calculating the supply amount of the coolant 9 and the steam 10 by comparing the input value with the weight of the stock solution from the load cell 21; Since the controller 22 is configured to adjust the supply amount (valve) of the cooling water 9 and the steam 10 based on the numerical signal of the supply amount from the PSI 23, Accurate concentration control and automation can be advantageous in terms of cost and time.

Description

An Apparatus for Controlling Concentration of Releasing Solution by Using Load-cell}

The present invention relates to an apparatus for controlling the concentration of a release solution using a load cell, and more particularly, to an apparatus for automatically adjusting the concentration of a releasing solution used in a rubber compounding device.

When preparing a rubber semi-finished product, a compounding process for properly mixing rubber raw materials with chemicals to exhibit predetermined characteristics is essential. In this compounding step, a release solution is usually added to prevent the intermediate rubber pieces coming out of the compounding device from sticking together due to high heat or the like. This release solution is made by mixing the solution stock solution with cooling water and steam, but if the production concentration is not constant, the degree of application of the solution to the formulation will vary from case to case, which is aesthetically unfavorable. In addition, if the use concentration is small, the proper function can not be ensured, there is a high possibility of adhesion between the rubber pieces, if too large, waste of the stock solution was large, there was a disadvantage in terms of cost.

Accordingly, an apparatus for maintaining a constant concentration of the release solution must be provided. As in FIG. 1, conventionally, the amount of the supplied stock solution, the cooling water 9 and the steam 10 was measured by the mechanical leveler 7. That is, after the stock solution of the stock solution tank 51 filled with a predetermined volume of the stock solution is manually introduced into the stirring vessel 5, the scale of the mechanical leveler 7 installed in the stirring vessel 5 is visually read and the water level thereof. After that, the cooling water and steam were properly supplied.

In addition, as shown in FIG. 2, the apparatus which installs the electronic leveler 11 in the stirring vessel 5 is also known. This is a step up from the mechanical leveler (7), and does not directly check the water level in the agitation tank (5) with the naked eye, but separately installs a leveler tube for raising and lowering the liquid inside according to the water level. The level is provided as a numerical value by the installed electronic sensing device. Next, the controller (not shown) calculates the volume from the numerical value for the water level, and based on this, the cooling water 9 and the steam 10 can be properly introduced into the stirring tank 5 through the valve. It is.

However, since the agitation tank 5 for producing a solution for use in the field is relatively large in capacity (usually, a tank shape larger than 5 tons), the mechanical leveler 7 or the electronic leveler 11 provides Even if there is a slight error in the water level, the volume or weight will show a negligible difference. Therefore, if the volume calculated based on the level provided by the leveler is not correct, mixing the cooling water and steam based on this does not give the desired concentration of the preparation solution. In particular, when the shape of the stirring vessel 5 is complicated or when the solution in the stirring vessel 5 flows, the exact amount of the solution could not be found.

Although not shown, there is also a method of installing a flow meter in the solution supply pipe 4, but in the initial state in which the solution flows, the inside of the tube is not filled with the solution and an empty space may be generated, which makes it difficult to measure the precise amount.

The present invention has been made to solve the above problems, an object of the present invention is to provide a concentration control device of the release solution for the compounding rubber that can be measured and adjusted more precisely the concentration of the release solution supplied.

Still another object of the present invention is to provide an apparatus for controlling the concentration of a release solution capable of continuously and automatically performing the adjustment process.

In order to achieve the above object, the present invention provides a device for controlling the concentration of the release solution in which the stock solution, cooling water and steam are mixed with each other in a stirring tank,

A load cell mounted to a lower portion of the solution stirring tank;

A computer for entering concentration conditions of the release solution;

A PLC connected to the computer to calculate a supply amount of cooling water and steam by comparing the input value with the stock solution weight from the load cell;

And a controller for adjusting the supply amount (valve) of the cooling water and the steam based on the numerical signal of the supply amount from the PI.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

3 is a configuration of the concentration control device of the release solution using a load cell according to the present invention.

The load cell 21 is provided in the lower part of the stock solution tank 51 and the lower part of the stirring tank 5 for stirring and manufacturing a release solution, respectively. The load cell 21 below the stock solution tank 51 is attached to check the remaining amount of the stock solution. A controller 22 is connected to the load cell 21, and a PLC 23 and a computer 24 are connected to the controller 22 in succession. Hereinafter, the process of adjusting the concentration of the solution by such a configuration will be described.

First, the concentration conditions and the like of the preparation solution are input to the computer 24. Thereby, the solution of a stock solution state is supplied to the stirring tank 5 by the pump 52 from the said stock solution storage tank 51. This may be supplied in response to a signal for the supply amount from the computer 24, but may be supplied by appropriately turning the dial for operating the valve 52 by hand.

Thereafter, the weight of the stock solution supplied to the stirring vessel 5 is measured by the load cell 21. And the measured value is input into the pieche 23. Accordingly, the PLS 23 calculates the supply amount (numerical signal) of the coolant 9 and the steam 10 based on the desired concentration input from the computer 24 and the weight of the stock solution from the load cell 21. do.

On the other hand, the controller 22 automatically adjusts the valves of the cooling water 9 and the steam 10 based on the supply amount data of the cooling water 9 and the steam 10 from the PLS 23.

This process may be performed continuously. That is, even before the stock solution is supplied and the cooling water and steam are completely supplied, additional stock solution can be supplied and calculation and adjustment can be made continuously. In this case, the amount of the stock solution can be determined only by subtracting the weight of the initial state from the total stock weight in the load cell 21.

According to the present invention having the above-described configuration, the amount of the release solution can be determined from the weight data, not the water level data, so that more accurate concentration control is possible, and since it can be automated through a computer, PSI and a controller, However, it is advantageous in terms of time.

1 is a block diagram of a release solution stirring device including an example of a conventional concentration control device.

Figure 2 is a block diagram of a release solution agitation device including another example of the conventional concentration controller.

Figure 3 is a block diagram of a release solution stirring device including an example of a control device according to the present invention.

※ Explanation of Major Drawings

4 ... Release solution input tube

5. Agitator

7 ... mechanical leveler

9 ... coolant

10 ... Steam

11 ... Electronic Leveler

21 ... load cell

22 ... controller

23 ... P rogrammable L ogic C ontroller

24 ... Computer

51 ... stock solution

52 ... Stock Feed Pump

Claims (1)

In the stirring tank 5, in the apparatus for adjusting the concentration of the release solution in which the stock solution, the cooling water 9 and the steam 10 are mixed with each other, A load cell 21 mounted below the solution stirring vessel 5; A computer 24 for entering concentration conditions of the release solution; A PIL 23 connected to the computer 24 for calculating the supply amount of the coolant 9 and the steam 10 by comparing the input value with the weight of the stock solution from the load cell 21; A load cell comprising a controller 22 for adjusting the supply amount (valve) of the cooling water 9 and the steam 10 based on the numerical signal for the supply amount from the Plsi 23 Concentration control device of the release solution using.