KR20000055032A - System for manufacturing cellular concrete in field - Google Patents

Abstract

PURPOSE: An apparatus for producing lightweight aerated concrete is provided to obtain an improved quality of concrete. CONSTITUTION: An apparatus comprises a raw material feeding unit for measuring and feeding an accurate amount of raw material to be used, a mixer unit for receiving an accurately measured amount of mixing water so as to produce a slurry from the mixing water and the raw material fed from the raw material feeding unit, an air bubble group generating unit for producing a diluted solution of foaming agent by mixing an undiluted solution of a foaming agent and the mixing water and generating foams from the diluted solution using a compressed air, and a transport unit for pumping the slurry produced by the mixer unit, forcedly inserting the air bubble group at an outer periphery or into a center of the pumped slurry, and transporting the resultant slurry along a transportation pipeline.

Description

Lightweight foam concrete manufacturing equipment for site casting {SYSTEM FOR MANUFACTURING CELLULAR CONCRETE IN FIELD}

The present invention relates to an apparatus for manufacturing lightweight foamed concrete for on-site casting, and more particularly, to improve the quality of lightweight foamed concrete for pouring on-site, to improve the quality of lightweight foamed concrete cast on-site, and to improve construction The present invention relates to a lightweight foamed concrete manufacturing apparatus.

Light-weight foam concrete is a cement secondary product used for floor insulation layers of multi-unit houses. Recently, research on improving the quality of lightweight foam concrete has been actively conducted as regulations on the insulation of buildings have been strengthened.

1 is a block diagram of a conventional apparatus for manufacturing lightweight foam concrete for on-site casting, in which 11 is a raw material input machine, 12 is a mixing unit, 13 is a foam diluent storage container, 14 is a pump, l5 is a compressor, 16 is a foamer, 17 Denotes the transfer pump, respectively.

In general, the lightweight foamed concrete manufacturing apparatus for site casting is mainly composed of a raw material input unit, a mixing unit, a bubble generating unit, a conveying unit. Looking at the configuration and operation of each functional unit are as follows.

First, the raw material input part 11 is a device for injecting cement and lightweight additives, which is provided with a hopper (raw material inlet) in front of the belt conveyor to fill the raw material in the hopper, and the conveyor belt is driven by a motor. In turn, the raw material filled in the hopper is fed into the conveyor belt. In the conventional raw material input part 11, since the raw material is exposed to the atmosphere, dust is generated, and since the raw material is not weighed, the raw material is added or less depending on the skill of the operator, so that the quality of the product is not uniform. There is a problem such as not.

The mixing part 12 is a functional part in which powder raw material (cement), light additives, mixed water (water), and bubble groups are added and mixed at the same time, and generally has a structure in which an impeller is installed in a cylindrical cylinder. Depending on the type, it is divided into a vertical mixer or a horizontal mixer. Since the mixing unit 12 must mix the raw materials within a short time, the stirring may not be performed properly depending on the performance of the impeller. In some cases, two mixers may be connected to each other to overcome this problem. . In addition, since the powder raw material (cement), lightweight additives, mixed water, and bubble groups are introduced at the same time, the bubble groups have a large amount of defoaming by the powder raw materials, lightweight additives, and mixed water, and thus require more bubble groups than actual requirements. do. For reference, since the main raw material of the foaming agent is formed of protein, when cured, a protein film is formed between raw material particles, which causes a decrease in compressive strength. The bubble generating unit is a functional unit for making a foaming agent into a bubble group, which is a foaming agent diluent storage container (13) for storing a solution of dilution of about 2 to 4% of the foaming liquid, and an input pump (14) for a sprayer for pumping the foaming agent diluent. And a compressor (15) for generating compressed air, and a foaming machine (15) for blowing compressed air into the foaming agent diluent transferred by the input pump (14) to create a bubble group. Foam group plays the most important role in the production of lightweight foam concrete, the final quality of the lightweight foam concrete depends on the quality of the foam group. Conventional bubble generator is used to dilute the bubble stock with water, so if you use all the diluted foaming agent has a hassle to dilute the foaming agent in the middle of the operation, if the foaming diluent is left at the end of the operation, the remaining dilution liquid is discarded In addition, the cost is increased due to the loss of the bubble during the disposal of the remaining diluent, and additional burden of the disposal cost is required, and since the foam diluent is a low concentration (about 2 to 4%) diluent, The specific gravity is lowered, there is a problem that the quality of the product is not homogeneous.

The conveying part is a function part which conveys the slurry mixed by the mixer of the mixing part to the pouring space, and mainly uses a mono pump. The monopump is equipped with a rubber called state in an iron case and an iron rotating body called rota inside the state. Rota, which is the iron rotating body, rotates to transfer the slurry. In the conventional transfer pump 17, when the slurry is transferred, the rotor or state is easily worn. As a result, when a gap is generated between the rotor and the state, the amount of air bubbles is increased due to a decrease in the conveying pressure.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, to improve the quality of lightweight foamed concrete poured in the field, and to provide a lightweight foamed concrete manufacturing apparatus for on-site casting.

1 is a block diagram of a conventional lightweight foamed concrete manufacturing apparatus.

Figure 2 is a block diagram of a lightweight foamed concrete manufacturing apparatus according to the present invention.

3A and 3B are a cross-sectional view and a plan view of a water bubble stock solution mixer according to the present invention.

4A and 4B are a structural diagram and a plan view of a bubble group slurry mixer.

* Explanation of symbols for main parts of the drawings

21,25 silo 22: speed controller

23 screw conveyor 24 primary mixer

26: 2nd mixer 27: bubble stock solution container

28,30,31: Metering Pump 29: Water Storage Container

32: water bubble stock solution 33,38: non-return valve

34: compressor 35: foaming machine

36: slurry transfer pump 37: bubble group slurry mixer

39: pressure gauge 40: transfer hose

Apparatus according to the present invention for achieving the above object is a lightweight foamed concrete manufacturing apparatus for on-site casting, raw material input means for precisely metering and inputting the raw material to be used as desired; Mixing means for slurrying the raw material introduced from the raw material input means by receiving the mixed water of the precisely quantified quantity; A bubble group generating means for quantitatively adding a foaming agent stock solution, quantitatively adding the mixed water, mixing the foaming agent stock solution with the mixed water, and foaming the mixed foaming agent diluent using compressed air; And a conveying means for pumping the slurry produced by the mixing means and allowing the bubble group to be press-fitted to the outer circumference or the center of the pumped slurry to be transported along the conveying pipe.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram of a device for manufacturing lightweight foamed concrete for on-site pouring according to the present invention, 21 is a silo for storing cement, 22 is a speed controller, 23 is a screw conveyor, 24 is a primary mixer, 25 is a light additive storage Mixer, 26 is the secondary mixer, 27 is the bubble stock solution, 29 is the mixed water (water) reservoir, 28, 30, 31 is the fixed-quantity pump, 32 is the water bubble stock mixer, 33, 38 is the non-return valve, 34 denotes a compressor, 35 denotes a foaming machine, 36 a transfer pump, 37 a bubble group slurry mixer, 39 a pressure gauge, and 40 a transfer hose.

The raw material input portion of the lightweight foamed concrete manufacturing apparatus according to the present invention, instead of the conventional belt conveyor, a silo for storing the cement 21, a screw conveyor 23 provided with a screw in the cylindrical cylinder, and the screw conveyor 23 With a speed controller 22 for adjusting the rotational speed of the motor to be driven, by adjusting the rotational speed of the screw at a constant speed through the speed controller 22, the cement stored in the silo 21 is introduced into the desired amount. . Therefore, it is possible to accurately measure the amount of cement injected, by using a silo, dust is not generated during operation. On the other hand, it is also possible to use a hopper instead of a silo as in the prior art, but it is preferable to use a silo.

The mixing unit according to the present invention is configured in the form of a primary mixer 24 and a secondary mixer 26. The primary mixer 24 is for slurrying the injected cement, which is driven by a motor that drives the screw conveyor 23, and has a structure similar to that of the screw conveyor, so that the raw materials introduced into the cylindrical cylinder can be transported while mixing. Is attached. Accordingly, the raw material of the quantity is transferred to the primary mixer 24 connected to the screw conveyor 23 by the screw conveyor 23 for feeding the raw material, and the mixed water (water) storage container 29 is provided by the metering pump 30. ) To the primary mixer 24 by the desired amount of water, to slurry the transferred raw materials. On the other hand, in order to measure the input amount of the mixed water more accurate may be installed in the rear end of the metering pump (30). In this way, since the raw material is slurried in the cylindrical cylinder by using the primary mixer, the raw material is not exposed to the outside, so that no dust is generated, and the raw material is first mixed to make a homogeneous slurry. The slurry thus produced is transferred to the secondary mixer 26, where other raw materials such as lightweight additives may be added to the secondary mixer 26. To this end, a lightweight additive storage silo 25 is provided, and likewise, a speed controller and a screw conveyor for adjusting the speed of the motor are installed, so that the desired amount of the lightweight additive is introduced. The secondary mixer 26 has a structure similar to that of the conventional mixer, and functions to mix the slurry added by the primary mixer 24 with the light additives. Thus, the mixing unit according to the present invention is composed of a primary mixer and a secondary mixer so that the raw materials can be mixed well.

In the present invention, in generating bubbles, the stock solution of the foaming agent and water, which are mixed water, are respectively stored, and they are configured to be mixed by a desired amount. That is, in the bubble generating unit according to the present invention is provided with a container 27 for storing the foaming stock solution and a container 29 for storing water, respectively, the foaming stock solution and water stored in the containers (27, 29) Each metering pump 28, 31 is used to pump the desired amount. Then, the foamed stock solution and water pumped by the desired amount are mixed using a mixer 32 having wings formed inside the pipe. Here, the dilution concentration of the water and the foam stock solution is determined by the transfer ratio of the water and the foam stock solution.

The water bubble stock solution mixer 32 is provided with a plurality of wings for forming a vortex in the liquid flowing into the cylindrical tube as shown in Figs. 3a and 3b. That is, a plurality of wings are fixedly installed to correspond to each other with a certain inclination angle inside the cylindrical tube, so that the flow of the liquid solution and the foaming agent can be mixed with water.

The backflow preventing valve 33 is provided such that the mixed solution of the foaming agent and water are not flowed back, and the foaming agent diluent is introduced into the foamer 35. In addition, the compressed air generated by the compressor 34 which is a compressed air generator flows into the foamer 35. Through this process, the bubble group is formed in the foamer 35.

In the present invention, the transfer pump 36 is a piston-type pimp, and since the suction and discharge of the slurry are simultaneously performed in one stroke of the piston, the pulsation is minimized and the slurry can be transferred to the high bed with a small power. In the present invention, the bubble group and the slurry are mixed at the rear end of the transfer pump 36. That is, as shown in Figures 4a and 4b in the present invention, the bubble group is press-fitted into the outer periphery or the center of the mortar sludge through each injection pipe of the mixer 37 interposed between the discharge port of the transfer pump 36 and the transfer pipe path do. Therefore, the bubble group is evenly distributed without coarsening by the turning energy of the mortar itself or the diffusion energy of the foam liquid. Such a slurry bubble group mixer 37 is described in Japanese Patent Laid-Open No. 7-100813 published on April 18, 1995 in Japan.

In order to prevent the backflow of the lightweight foam concrete made by the slurry bubble group mixer 37, a backflow prevention valve 38 is provided, and the foamed concrete that has passed through the backflow prevention valve 38 is placed through a transfer pipe throttle. Transferred. On the other hand, the pressure gauge 39 may be installed on the conveying pipe, and the rear end of the non-return valve 38 is provided with a drain for discharging the slurry of lightweight foamed concrete exceeding the conveying amount to the outside.

According to the present invention made as described above it is possible to quantitatively input the raw material, to improve the mixing performance of the raw material through the mixing of the raw material over the second, to reduce the amount of foaming agent used and improve the bubble quality by using the foaming agent stock solution It is possible to improve the quality of lightweight foam concrete.

Claims (13)

In the lightweight foam concrete manufacturing apparatus for site casting, Raw material input means for precisely weighing and inputting the raw materials used as desired; Mixing means for slurrying the raw material introduced from the raw material input means by receiving the mixed water of the precisely measured quantity; A bubble group generating means for quantitatively adding the foaming agent stock solution, quantitatively adding the mixed water, mixing the foaming agent stock solution with the mixed water, and foaming the mixed foaming agent diluent using compressed air; And A conveying means for pumping the slurry produced by the mixing means and allowing the bubble group to be press-fitted to the outer circumference or the center of the pumped slurry and transported along the conveying pipe Light-weight foam concrete manufacturing apparatus for on-site pouring, characterized in that it comprises a. The method of claim 1, The raw material input means, At least two storage means for storing each raw material; Power providing means for providing power; Speed adjusting means for adjusting a rotational speed of the power providing means; And At least two input means which rotate by the power provided by the power providing means, and input each of the stored raw materials to the mixing means; Light-weight foam concrete manufacturing apparatus for on-site pouring, comprising a. The method of claim 2, Each of the storage means is a lightweight foamed concrete manufacturing device for on-site pouring, characterized in that it comprises a silo. The method of claim 2, Each of the input means is a lightweight foamed concrete manufacturing apparatus for on-site casting, characterized in that it comprises a screw-type conveyor is installed in the cylinder of the cylinder. The method of claim 2, The mixing means, Primary mixing means for mixing the fixed-quantity mixed water and the binder introduced from the raw material input means to make a first slurry; And Secondary mixing means for mixing the primary slurry and the light additives introduced from the raw material input means; Light-weight foam concrete manufacturing apparatus for on-site pouring, comprising a. The method of claim 5, The primary mixing means, Received power from the power supply means, the input means, and the light-weight foam concrete manufacturing apparatus for on-site casting, characterized in that the wing is attached to the cylinder of the cylinder. The method of claim 1, The bubble group generating means, First pumping means for quantitatively pumping the foam stock solution; Second pumping means for metering the mixed water; Mixed water bubble stock solution mixing means for mixing the fixed-quantity pumped foaming stock solution and mixed water in a pipe; Compressed air generating means for generating compressed air; And Foaming means for foaming using the foaming agent diluent of the mixed water bubble stock solution mixing means and the compressed air Light-weight foam concrete manufacturing apparatus for on-site pouring, comprising a. The method of claim 7, wherein The mixed water bubble stock solution mixing means, Light-bubble concrete manufacturing apparatus for on-site casting, characterized in that the fixed fixed angle of the plurality of wings inside the pipe to be installed, so that the introduced liquid is diluted by the vortex. The method of claim 7, wherein Light-weight foam concrete manufacturing apparatus for on-site pouring, characterized in that it further comprises a first backflow prevention valve installed between the mixed water bubble stock solution mixing means and the foaming means. The method of claim 1, The transfer means, A transfer pump for pumping the slurry of the mixing means; A slurry bubble group mixing means installed at a rear end of the transfer pump and having a plurality of injection holes for injecting the bubble group into an outer circumferential surface thereof; And Pressure gauge for measuring the pumping pressure of the bubble foam concrete mixed with the bubble group and slurry Light-weight foam concrete manufacturing apparatus for on-site pouring, comprising a. The method of claim 10, Light-weight foam concrete manufacturing apparatus for on-site pouring, characterized in that it further comprises a second backflow prevention valve installed between the slurry bubble group mixing means and the pressure gauge. The method of claim 11, It is installed on the rear end of the second non-return valve, the apparatus for manufacturing on-site lightweight foam concrete, characterized in that it further comprises a drain for discharging the pumped lightweight foam concrete to the outside. The method according to any one of claims 10 to 12, The transfer pump includes a piston-type pump, lightweight foamed concrete manufacturing apparatus for on-site pouring, characterized in that the suction and discharge of the slurry is made at the same time in one stroke of the piston.