JPS6221774A - Foam generator for foamed concrete - 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 (Field of Industrial Application) The present invention relates to a bubble generator for cellular concrete, and in particular, a buffer tank is installed between a foaming agent solution tank and a foaming nozzle, whereby the foaming agent solution The tank is characterized by having a normal pressure inside the tank, making the structure of the tank extremely simple, and ensuring safety.

(Conventional technology) Aerated concrete has traditionally been used instead of ordinary concrete for backfilling in civil engineering work and for non-load-bearing parts of buildings, and it is not only economical, but also reduces the weight of buildings and improves insulation. It is measured.

This cellular concrete is formed on site by the so-called preform method, in which air bubbles are mixed with cement paste mortar and cast. Therefore, in addition to #concrete mixers, bubble generators are used at pouring sites, but depending on the site, water may not necessarily be able to recede. As shown, the bubble generator is equipped with a foaming agent solution tank, into which a predetermined amount of foaming agent solution can be filled.

(Problems with conventional technology) By the way, in the above-mentioned conventional bubble generator, the foaming agent solution tank is a pressure-resistant tank.

This tank is filled with a predetermined amount of foaming agent solution in advance, and compressed air is forced into this tank to push the foaming agent solution in the tank to the bubble generating nozzle.
The equipment is a so-called batch system, and it is not possible to replenish the foaming agent solution even if it is found to be insufficient during operation.The tank has a capacity of at least several hundred liters, and moreover, it is difficult to replenish the foaming agent solution even if it becomes insufficient during operation. Since compressed air of approximately CDD is injected into the tank, it must be constructed to withstand pressure, and there is even a risk of it bursting during operation.

(Means for Solving the Problems) The present invention solves the above-described drawbacks of the conventional bubble generating device, and has a foaming agent solution tank that is a normal pressure tank, and a space between the tank and the bubble generating nozzle. A small buffer tank is attached to the tank, and this buffer tank is made into a pressure-resistant tank, which has the same foaming agent solution delivery function as the conventional foaming agent solution tank described above.This greatly improves the structure of the foaming agent solution tank. By simplifying and ensuring safety and refilling the foaming agent solution tank with fresh foaming agent solution during operation,
This enables continuous operation.

(Embodiments) The present invention will be specifically described below based on illustrated embodiments.

In the figure, numeral 1 is a foaming agent solution tank, 2 is a buffer tank, 3 is a bubble generating nozzle, and 4 is a compressor.

A pressure pump 6 and a buffer tank 2 are attached to a liquid feed pipe 5 that connects the foaming agent solution tank 1 and the bubble generating nozzle 3. Pump up the solution and pump it into buffer tank 2,
The foaming agent solution in the buffer tank 2 is sent to the bubble generating nozzle 3. The pressure feed pipe 7 attached to the compressor 4 is connected to the buffer tank 2 and the bubble generation nozzle 3, and pressure-feeds 20 to 30 times more air to the bubble generation nozzle 3 than the foaming agent solution sent into it. At the same time, compressed air is also forced into the buffer tank 2, and the foaming agent solution in the tank is sent out to the bubble generating nozzle 3 using the pressure.

The buffer tank 2 functions as a flow rate regulator of the foaming agent solution to the bubble generation nozzle 3 and at the same time as a liquid feeding pump, and is a kind of pressure-resistant tank, into which new foaming agent solution and By injecting compressed air, the foaming agent solution previously contained therein is forced out toward the bubble generating nozzle 3 under the pressure. Of course, this buffer tank 2 is equipped with a pressure regulating valve 8 so that the internal pressure and air volume can be adjusted, and a liquid level gauge 9 is also attached, so that the foaming agent solution can be adjusted. Needless to say, the operation of the pressure pump 6 is controlled depending on the amount of the liquid. Although there is no particular limitation on the internal volume of the buffer tank 2, -
The amount of foaming agent solution supplied to the bubble generation nozzle 3 in each operation is about 10 to 20Q, and the pressure pump 6
Since the internal volume also operates, there is almost no need to increase the internal volume to 20Q or more, and in most cases, 10Q or less is sufficient.

(Function) When creating bubbles, for example, the internal pressure of the buffer tank 2 is adjusted to 5 kg/d using the pressure control valve 8, and the compressor 4
is activated to send a predetermined amount of compressed air to the bubble generating nozzle 3 at a pressure of 4 kg/ad, and at the same time, a predetermined amount of compressed air is supplied to the buffer tank 2.
Inject air of kg/cJ. Then, the foaming agent solution previously contained in the buffer tank 2 is pushed out by this air pressure and sent to the bubble generating nozzle 3, where it mixes with compressed air to form bubbles and is ejected from the nozzle. When the foaming agent solution in the buffer tank 2 falls below a certain level, the liquid level gauge 9 detects this and the pressure pump 6
The foaming agent solution in the foaming agent solution tank 1 is sent to the buffer tank 2.

(Effects) As detailed above, the present invention interposes a pressure-resistant buffer tank 2 between the foaming agent solution tank 1 and the bubble generating nozzle 3, and once the foaming agent solution is sent into the buffer tank 2, This is forced to be fed to the bubble generating nozzle 3,
The foaming agent solution tank 1 does not need to be a pressure-resistant tank, and can just be a simple liquid storage tank, so the structure is extremely simple and has the advantage that there is no risk of it bursting during use.

[Brief explanation of the drawing]

The figure is an explanatory diagram showing one embodiment of the present invention. 1; Foaming agent solution tank 2; Buffer tank 3; Bubble generating nozzle 4; Compressor 5; Liquid feeding pipe 6;
Pressure feed pump 7; Pressure feed pipe 8; Pressure control valve 9;
Liquid level indicator

Claims (1)

[Claims] A pressure pump is installed between the foaming agent solution tank and the pressure-resistant buffer tank, so that the foaming agent solution contained in the foaming agent solution tank is sent to the buffer tank, and the buffer tank and a bubble generating nozzle, and a compressed air feeding pipe between the compressor and the bubble generating nozzle and between the compressor and the buffer tank. .