JPH08155366A - Device for supplying fixed quantity of slurry - Google Patents

Abstract

PURPOSE: To continuously and quantitatively supply a slurry by controlling a pressure controller so that a slurry supply rate detected by a supply rate detecting sensor of the slurry supplied from a pressure tank to a nozzle may be a target value. CONSTITUTION: The slurry S is supplied from a supply port 4a into a pressure tank 4 to store, and a float 5 is floated on a surface of the slurry S. Then, a compressed air from a pressure source 1 is introduced into an upper part of the pressure tank 4 through a proportioning controlling valve 2 and an air tube 3. The pressure of this introduced compressed air is impressed on a surface of the float 5 in the pressure tank 4 to uniformly pressurize a liq. surface of the slurry S and the slurry S is flew out from the nozzle 10. Moreover, an opening degree of the proportioning controlling valve 2 which is the pressure controlling device is controlled so that the slurry S supply rate detected by an electromagnetic flowmeter 7 of the supply rate detecting sensor may be the target value. In this way, the slurry can be supplied continuously and quantitatively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slurry constant quantity supply device suitable for constant quantity supply of mortar and resin slurry having a high filler content, and more specifically, to a slurry constant quantity supply of a slurry from a pressure tank. Regarding the feeding device.

[0002]

2. Description of the Related Art An apparatus for filling a viscous fluid in a pressure tank and quantitatively supplying the viscous fluid from the pressure tank is disclosed in FIG. 5 of Japanese Patent Publication No. 6-77710. In this quantitative supply device, an outflow pipe is connected to a pressure tank, and a valve whose opening can be adjusted is provided at the tip of this outflow pipe. The opening of this valve is adjusted to discharge viscous fluid. The amount is controlled to reach the target value.

[0003]

However, in a mortar or a resin slurry having a high filler content, the flow characteristics change due to various factors such as variation in formulation, progress of curing reaction, and changes in environmental conditions such as temperature and humidity. For,
It has been difficult to continuously obtain an arbitrarily set discharge amount simply by adjusting the valve opening.

For mortar (kneaded product of cement, sand and water) and resin slurry having a high filler content, a valve is provided on the downstream side of the pressure tank and the opening of the valve is adjusted. In this case, the inner surface of the valve is severely worn and the durability of the valve is impaired. Also,
Especially in the case of mortar, when the valve opening is narrowed down,
Material separation (a phenomenon in which sand and cement paste are separated) easily occurs.

[0005]

SUMMARY OF THE INVENTION A slurry fixed amount supply device of the present invention comprises a pressure tank for containing a slurry, a pressure source for supplying a pressure gas to an upper part of the pressure tank, and a slurry supplied from the pressure tank. In a slurry fixed amount supply device having a nozzle, a supply amount detection sensor for the slurry supplied from the pressure tank to the nozzle, and a pressure regulator for pressure gas supplied from the pressure source to the pressure tank,
A control device for controlling the pressure regulator so that the slurry supply amount detected by the sensor reaches a target value.

[0006]

In the slurry constant quantity supply device of the present invention, the amount of slurry outflow from the pressure tank is adjusted by adjusting the pressure of the pressure gas introduced into the pressure tank.

[0007]

EXAMPLE FIG. 1 is a systematic diagram of a slurry quantitative supply device according to an example. Compressed air from a pressure source 1 such as a compressor is introduced into the upper portion of a pressure tank 4 via a proportional control valve 2 and an air tube 3. The slurry S is supplied from the charging port 4a and stored in the pressure tank 4, and the float 5 floats above the liquid surface of the slurry S. The bottom surface of the pressure tank 4 is roundly curved, and the lower surface of the float 5 is curved following the bottom surface of the pressure tank 4, so that when the float 5 sinks, almost the entire lower surface of the float 5 is pressure tank. It overlaps with the bottom surface of No. 4 to almost eliminate the residual slurry.

An inflow port of the electromagnetic flowmeter 7 is connected to the outflow port 4b at the bottom of the pressure tank 4 via a pipe 6, and the outflow port of this electromagnetic flowmeter 7 is a pipe 8 and an opening / closing valve 9.
It is connected to the nozzle 10 via. The electromagnetic flowmeter 7 has a ceramic lining on the inner surface in order to prevent wear and noise.

The detection signal of the electromagnetic flow meter 7 is input to the controller 11, and this controller 11 controls the opening of the proportional control valve 2 so that the passage flow rate of the electromagnetic flow meter 7 becomes a target value.
The controller 11 sends an open / close signal to the open / close valve 9 to open / close the open / close valve 9 at a predetermined timing.

In the slurry fixed amount supply device thus constructed, the compressed air pressure from the pressure source 1 is applied to the upper surface of the float 5 in the pressure tank 4 so that the float 5 uniformly covers the entire liquid surface of the slurry S. , The liquid surface of the slurry S is evenly lowered, and the slurry S flows out of the nozzle 10. Then, the opening degree of the proportional control valve 2 is controlled so that the slurry flow rate detected by the electromagnetic flow meter 7 becomes a target value.

In this slurry quantitative supply device, the slurry outflow amount is detected by an electromagnetic flow meter, and the compressed air pressure introduced into the pressure tank is controlled based on the detected data to control the slurry outflow amount. Therefore, the slurry can be continuously supplied in a fixed amount even if the flow characteristics are changed due to variations in preparation, progress of curing reaction, changes in environmental conditions such as temperature and humidity.

Since the above control method is used,
There is no flow rate control valve downstream of the pressure tank 4. Therefore, the material separation that occurs in the conventional example due to the narrowed opening of the flow rate control does not occur. The open / close valve 9 merely opens and closes and does not have a function of narrowing the flow path.

In this embodiment, the flow resistance of the slurry can be reduced by making the pipes 6, 8 downstream of the pressure tank 4 linear.

[0014]

EFFECTS OF THE INVENTION According to the slurry constant quantity supply device of the present invention, the slurry can be continuously supplied in constant quantity without being influenced by the preparation of the slurry, the elapsed time after preparation, the change of the environment and the like. Also, since the valve that requires opening adjustment is not used downstream of the pressure tank, the durability of the device is improved,
Material separation is also prevented.

[Brief description of drawings]

FIG. 1 is a system diagram of a slurry quantitative supply device according to an embodiment.

[Explanation of symbols]

 1 Pressure Source 2 Proportional Control Valve 3 Air Tube 4 Pressure Tank 5 Float 7 Electromagnetic Flowmeter 9 Opening / Closing Valve 10 Nozzle 11 Controller

Claims (1)

[Claims] 1. A slurry constant quantity supply device comprising: a pressure tank for containing a slurry; a pressure source for supplying a pressure gas to an upper part of the pressure tank; and a nozzle for supplying the slurry from the pressure tank, A sensor for detecting the amount of slurry supplied from the tank to the nozzle, a pressure regulator for pressure gas supplied from the pressure source to the pressure tank, and a slurry supply amount detected by the sensor to a target value. And a controller for controlling the pressure regulator.