JPH07229298A - Aerated concrete placing device - Google Patents

Abstract

PURPOSE:To feed a fixed quantity of a dilute foaming solution and compressed air into a foaming machine quantitatively, and to obtain foamed slurry having constant porosity. CONSTITUTION:A charging port 11 is formed on the start end side of an opening type continuous type mixer 1, a fixed-quantity supply pipe 41 and a bubble generator 2 are connected to the charging port 11, a discharge opening 12 is formed on the terminal side, and formed foamed slurry is discharged continuously from the discharge opening 12. A delivery pipe 31 is coupled with the discharge opening 12, and foamed slurry discharged from the discharge opening is received by the delivery pipe, and sent toward a specified place by a delivery pump 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for placing aerated concrete.

[0002]

Aerated concrete is a concrete or mortar containing a large amount of bubbles (closed bubbles).
Because of its light weight and heat insulation and vibration absorption properties, it is widely used for reinforcing soft ground, backfilling civil engineering works, and as floor and wall materials for buildings. When pouring aerated concrete, attach a pressure pipe to the squeeze pump, connect it to the mixer, connect the foamer of the bubble generator immediately before the mixer on this pressure pipe, and then connect it to the agitator drum of the concrete mixer truck. A method was used in which while the female mixed concrete (or mortar) produced in (1) was sent to the mixer by a squeeze pump, bubbles were sent to it from the bubble generator, and both were mixed by the mixer to form a foamed slurry and extruded.

[0003]

Conventionally, the women's mixed concrete (or mortar) and the air bubbles cannot be mixed without using a closed mixer, and an open mixer is used for mixing. It is said that foamed slurry having a predetermined porosity cannot be obtained because air bubbles are separated and scattered during the period. Therefore, in the pouring device for aerated concrete, the mixer is not an open type, but is limited to a closed type, and the women's mixed concrete (or mortar) and air bubbles are pressed into the mixer by a squeeze pump, and inside the mixer. The pressure applied to the women's mixed concrete (or mortar) is used to mix the two, and the foamed slurry thus produced is also used to push out from the mixer. Therefore, this device requires a considerable amount of force when feeding the bubbles generated in the foamer into the mixer. Therefore, when the diluted foaming solution is fed from the pressure tank to the foaming machine, the same force is required. However, in the above-mentioned conventional foam concrete pouring device, by increasing the air pressure in the pressure tank of the bubble generator, the diluted foaming solution in the tank is pushed out by the pressure and press-fitted into the foaming machine, which occurred here. Since bubbles are pushed into the mixer by utilizing the pressure, even if compressed air is quantitatively sent to the pressure tank, the resistance force when sending the diluted foaming solution to the foaming machine becomes a little larger, The extrusion of the diluted foaming solution stops, and at that time, the increase in the volume of the air fed into the tank is absorbed due to the increase in the pressure. Especially, in the case of a conventional cellular concrete pouring device, in which the pressure tank has a relatively large inner volume, the pressure of air is high, and the dilute foaming solution is extruded little by little, it is extruded from the tank. Even if the volume of the diluted foaming solution is temporarily reduced or the extrusion of the diluted foaming solution is stopped, the pressure of the air in the tank changes very little. Moreover, since air is sent to the pressure tank even while the extrusion of the diluted foaming solution is reduced or stopped, the internal pressure of the pressure tank gradually increases, and then the diluted foaming solution is sent to the foaming device. When the resistance to time becomes small, the dilute foaming solution is pushed out of the pressure tank at once. Therefore, even if the provisional lady's mixed concrete (or mortar) was quantitatively sent to the mixer, it was almost impossible to quantitatively send the dilute foaming solution to the foaming machine, and therefore the foaming slurry contained bubbles. It was not constant and sometimes even foamed slurries containing almost no bubbles were produced. An object of the present invention is to provide an aerated concrete pouring device capable of quantitatively feeding a predetermined amount of a dilute foaming solution and compressed air into a foaming machine and obtaining a foamed slurry having a constant porosity. There is.

[0004]

In the cellular concrete pouring apparatus according to the present invention, a conventional cellular concrete pouring apparatus connects a pressure-feeding pipe to a mixer of a closed type, to which ladies mixed concrete and air bubbles are connected. The point that it was a method to mix both in a sealed state by press fitting was changed, the mixer was changed to an open type (normal pressure) continuous type mixer, and a discharge pipe was connected to its discharge port, and a ladies mix Do concrete (or mortar) and air bubbles are put into an open continuous mixer and mixed, and the resulting foamed slurry is discharged sequentially from the discharge port, received by the sending pipe, and continuously sent by the sending pump. It is configured to be sent out automatically. By configuring the mixer in this way, it is possible to quantitatively feed the women's mixed concrete (or mortar) to the mixer with almost no special pressure, and to dilute the foaming solution. It was configured so that it could be sent to the foaming machine with almost no resistance (at a pressure close to normal pressure), and the diluted foaming solution and compressed air could be quantitatively sent to the foaming machine in specified amounts. Thus, the above-mentioned object is achieved. The amount of the diluted foaming solution sent to the foaming machine can be controlled by adjusting the pressure of the air in the tank and the opening / closing degree of the valve for adjusting the flow rate. Connect the diluting foaming solution feed pipe and the compressed air feeding pipe to the diluting foaming solution feed pipe, and install a constant flow valve for water solution, a stop valve, and a solenoid valve for the liquid. It is connected to a pressure tank for use so that the diluted foaming solution in the pressure tank can be quantitatively sent to the foaming machine, and a constant flow valve for air and a stop valve, and air It is also possible to adopt an embodiment in which a solenoid valve for use is attached and this is connected to an air compressor via an air pressure adjusting unit so that compressed air of a predetermined pressure is quantitatively sent to the foaming device. The foaming machine may be an embodiment configured so that the air in the pressure tank is sent to the foaming machine.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an aerated concrete placing device according to the present invention will be specifically described below with reference to the drawings. In this embodiment, the aerated concrete placing device comprises a mixer 1, an aeration device 2 and a delivery pump 3. The mixer 1 is an open-type continuous mixer, and has an input port 11 formed at the start end side and a discharge port 12 formed at the end side of the main body. Further, the bubble generator 2 and a fixed amount supply pipe 41 are connected to the input port 11, and the delivery pipe 31 is connected to the discharge port 12, and the ladies made by the agitator drum 42 of the concrete mixer truck 4 is connected. When mixed concrete (or mortar) is charged into the mixer 1 and bubbles are supplied to the mixer 1 at the same time, both are mixed to form a foamed slurry. Then, this foamed slurry is continuously discharged from the discharge port 12, and the delivery pipe 31,
With the delivery pump 3 attached to the pipe 31, it is delivered to a predetermined location. This mixer 1 is an open type mixing device. Therefore, it is not necessary to connect the bubble generator 2 and the fixed amount supply pipe 41 to the charging port 11 in an airtight state, and almost no special pressure for supplying the women's mixed concrete or the bubbles to the mixer 1 is required. . For example, the charging port 11 may be formed in a funnel shape so that the female mixed concrete and air bubbles can be dropped into the charging port for charging. Therefore, the pump 43 attached to the fixed quantity supply pipe 41 is sufficient as long as it can quantitatively send the women's mixed concrete (or mortar) to the mixer 1, and similarly, the bubble generating device 2 also has a predetermined quantity. It is sufficient if the bubbles can be sent to the mixer 1. Therefore, the bubble generating device 2 does not need any special pressure to send the foaming solution to the foaming device 51, and it is sufficient if the liquid sending pump mechanism is capable of quantitatively sending a predetermined amount of liquid.

FIG. 2 shows an example of the bubble generator 2. In the figure, reference numeral 5 is a foaming unit, 6 is an air compressor unit, 7 is a tank unit, and 8 and 9 are air pressure adjusting units. In the tank unit 7, the foaming agent dissolving tank 23 is connected to the pressure tank 21, and the foaming agent is dissolved and diluted in an appropriate amount of water here to adjust the diluted foaming solution and transfer it to the pressure tank 21. Has become. Also, the pressure tank 21
Is connected to an air compressor unit 6 via an air pressure adjusting unit 8 and a receiver tank 62,
Compressed air adjusted to an appropriate pressure is sent into this to bring the inside of the tank 21 to a predetermined air pressure. still,
This pressure tank 21 is similar to a normal one of this kind, and includes a pressure gauge 24, a safety valve 25, a water level gauge 26, an air vent valve.
27, a drain valve 28, etc. are attached for safety and convenience of use. Air compressor unit 6
Is an oilless type in which an oil removing device 63 is attached to an air compressor 61, and oil drops are not mixed in the compressed air. The compressed air discharged from the air compressor 61 is once guided to the air receiver tank 62, and then a part of the pressure is adjusted by the air pressure adjusting unit 8 and sent to the pressure tank 21, so that the inside of the tank is predetermined. And the other part by the air pressure adjusting unit 9,
The pressure is adjusted and passes through the inlet pipe 53, and the air constant flow valve 59
It is designed to be sent to the foaming device 51 via the. The foaming unit 9 includes a foaming device 51 and a diluting foaming solution feed pipe 52,
It is composed of a compressed air supply pipe 53, and a connection socket is formed at the tip thereof so as to be connected to the mixer 1. The feed pipe 52 is connected to the liquid feed pipe 22 of the diluted foaming solution pressure tank 21, and the feed pipe 53 is connected to the air pressure adjusting unit 9 and the receiver tank 62.
It is designed to be connected to the air compressor 61 via the, and the feed pipe 52 is connected to the liquid feed pipe 22 of the pressure tank 21,
By connecting the feed pipe 53 to the air compressor 61, the dilute foaming solution and the compressed air are sent to the foaming device 51, and the two are mixed in the foaming device 51 to form bubbles, which are then sent to the mixer 1, and the concrete is mixed. The agitator drum 42 of the mixer truck 4 mixes with the female mixed concrete (or mortar) fed into the mixer 1 to form a foamed slurry. In addition, the delivery pipe
53 is also connected to the pressure tank 21, so that the air of the pressure tank 21 can be sent to the foaming device 51 by closing the valve of the air pressure adjusting unit 9 and opening the valve 29 of the pressure tank 21. It is also becoming. Also, the delivery pipe
Two stop valves 54, 54 and a solenoid valve 55 for liquid are attached to 52, which can be operated manually or automatically.
The tube 52 can be made conductive only when necessary. Further, a constant flow rate valve 56 for aqueous solution is attached to the feed pipe 52, so that a preadjusted amount of the diluted foaming solution is quantitatively fed to the foaming device 51. Similarly, the feed pipe 53 is provided with two stop valves 57, 57 and a solenoid valve 58 for air so that the pipe 53 can be conducted only by manual operation or automatically when necessary. Further, a constant flow rate valve 59 for air is attached to the feed pipe 53, and the compressed air of a preadjusted amount is quantitatively fed to the foaming device 51. It is like this.

When pouring aerated concrete, a predetermined amount of foaming agent and water are put into the foaming agent dissolving tank 23 to prepare a diluted foaming solution, which is then transferred to the pressure tank 21. or,
Adjust the air pressure adjusting units 8 and 9 to adjust the pressure tank 21.
And the pressure of the air sent to the foaming device 51 are respectively adjusted, and the constant flow rate valve 56 for the aqueous solution and the constant flow rate valve 59 for the air are adjusted so that a desired amount of the diluted foaming solution is contained in each. Allow compressed air to pass through. Then, the pump 43 is driven and the air compressor 61 is driven to open the liquid solenoid valve 55 and the air solenoid valve 58. Then, the women's mixed concrete (or mortar) is sent from the concrete mixer truck 4 to the mixer 2, and the amount of bubbles corresponding to the amount of the women's mixed concrete (or mortar) is sent from the bubble generator. Then, the women's mixed concrete (or mortar) becomes a foamed slurry and is sent out to a predetermined place by a sending pump.

[0008]

As described above in detail, according to the present invention, in the conventional concrete placing apparatus, the women's mixed concrete (or mortar) and the air bubbles cannot be mixed without using a closed mixer. The ladies mixed concrete (or mortar) and air bubbles are pressure-fed to the mixer, and the pressure applied to the ladies mixed concrete (or mortar) is used in the mixer to mix with the air bubbles. By improving the point that the foamed slurry was extruded from the mixer by utilizing its pressure, the mixer uses an open type continuous mixer, and by connecting a delivery pump to this mixer, The function of is fully demonstrated. In other words, by opening the mixer, ladies mixed concrete (or mortar)
It is not necessary to press into the mixer, just add it. Therefore, almost no load is applied to the pump 43. Therefore, an ordinary pump such as a squeeze pump is used, and ladies mixed concrete (or mortar) is used.
Can be supplied quantitatively. Similarly, when the diluted foaming solution is supplied to the foaming machine, no particular load is applied, so that the means for sending this to the foaming machine is not limited. For example, as in the embodiment shown in the figure, the diluted foaming solution can be put in a pressure tank and sent to the foaming machine by using air pressure, or the diluted foaming solution adjusted in the foaming agent dissolving tank can be used for liquids. It is also possible to pump directly into the foamer. In addition, since no special load is applied to the pump in this device, the feed rate of the dilute foaming solution and the feed rate of air to be fed to the foaming device can be adjusted simply by adjusting the valve. Therefore, in this device, the amount of diluted foaming solution and air sent to the foaming device can be accurately controlled with respect to the amount of lady's mixed concrete (or mortar) supplied to the mixer, so that the porosity of a predetermined porosity can be obtained. A foamed slurry is obtained and can be cast. In addition, the mixer is made to be a continuous type, and it is configured such that the women's mixed concrete (or mortar) and air bubbles are quantitatively supplied and mixed, and the resulting foamed slurry is continuously discharged from the discharge port. By sending foamed slurry to a pipe and sending it to a predetermined location by a pump, it is not necessary to press ladies mixed concrete (or mortar) and air bubbles into the mixer. From this point as well, the quantitative supply to the mixer is performed easily and accurately. Moreover, the women's mixed concrete (or mortar) and the air bubbles supplied to the mixer are immediately delivered into the pipe 31 where they are mixed and become foamed slurry, so the air bubbles are not separated or scattered, A homogeneous foaming slurry is always obtained.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of an aerated concrete placing device according to the present invention.

FIG. 2 is a partially cutaway front view of a system diagram showing an example of a bubble generating device.

[Explanation of symbols]

 1 Mixer 2 Air bubble generator 3 Pump for sending out 4 Concrete mixer truck 5 Foaming unit 6 Air compressor unit 7 Tank unit 8 Air pressure adjusting unit 9 Air pressure adjusting unit 11 Input port 12 Discharge port 21 Pressure tank 22 Liquid supply pipe 23 Foaming Agent dissolution tank 24 Pressure gauge 25 Safety valve 26 Water level gauge 27 Air bleeding valve 28 Drain bleeding valve 29 Valve 31 Outlet pipe 41 Fixed amount supply pipe 42 Agitator drum 43 Pump 51 Foamer 52 Inlet pipe 53 Inlet pipe 54 Stop valve 55 For liquid Solenoid valve 56 Constant flow valve for aqueous solution 57 Stop valve 58 Solenoid valve for air 59 Constant flow valve for air 61 Air compressor 62 Receiver tank 63 Oil removal device

Claims (1)

[Claims] 1. In an aerated concrete placing device comprising a mixer, an air bubble generating device, and a delivery pump, the mixer is an open type (normal pressure) continuous mixer, and is charged at the starting end side thereof. The mouth is formed, and the fixed amount supply pipe and the bubble generating device are connected to this, so that a predetermined amount of ladies mixed concrete, or mortar and bubbles can be quantitatively supplied, and the end side A discharge port is formed in the discharge port, and the generated foamed slurry is continuously discharged from the discharge port.A discharge pipe is connected to the discharge port, and the foamed slurry discharged from the discharge port. And a pipe for receiving the water, and a pump for sending the water to send the water to a predetermined location to deliver the concrete. .