JP2003181254A - Method and apparatus for continuous kneading - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control the supply quantity of a liquid material and a liquid chemical agent in kneading. <P>SOLUTION: A powder tank 1 connected to a vertical mixer 10, a liquid material tank 20, a liquid chemical agent tank 30 and a control panel 60 for controlling the supply quantity of each tank 1, 20 and 30 and adjusting a gelating time are provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous kneading method and its apparatus used in the fields of civil engineering and construction.

[0002]

2. Description of the Related Art Conventionally, paste-like kneaded materials have been used in ground improvement work and the like. This kneaded product is generally manufactured using a pan-type (also called a tub-type) two-tank type grout mixer.

In this mixer, powder, water and chemicals, which have been calculated for each batch, are put into the upper tank and kneaded. Then, after kneading for a certain time, a part of the upper tank is opened to move the kneaded product to the lower tank. In the lower tank, the kneaded material is supplied to the pressure-feeding device while being stirred so that material separation does not occur, and injection is performed.

However, the use of this mixer has the following problems. (1) Kneading work is complicated and time-consuming. (2) Any kneaded mixture that has been kneaded must be discarded when it remains. (3) If the amount of chemicals added is not adjusted, one batch must be discarded.

(4) If the work has to be interrupted in the middle of the process, it takes a lot of time to clean the device and the amount of waste increases. In order to prevent this, if the batch is made smaller, the number of times water, chemicals, etc. are measured increases, and the work becomes more complicated. (5) Since it is a batch type, it cannot be kneaded continuously. Therefore, when a large amount of kneaded material is required, the number of times water, chemicals, etc. are measured increases, and the work becomes more complicated. (6) The injection material may leak from the cracks in the rock during the ground injection work. In this case, the setting time and / or gel time (hereinafter simply referred to as "gel time") should be adjusted instantaneously. , It should be a kneaded product with a short gel time. However, since such a correspondence is not possible in this batch type, a continuous kneading device capable of continuously kneading has been developed (see Japanese Patent Laid-Open No. 5-345121).

This apparatus comprises a transfer screw for transferring the material to be kneaded supplied from the material input port to the transfer casing to the kneading casing, and a detachable flow path control plate installed at the introduction part of the kneading casing. The kneading blade is installed in the kneading casing and has a kneading blade coaxial with the transfer screw.

[0007]

In the conventional example, the chemicals are added to the powder or water in advance in the state of being supplied to the continuous kneading apparatus, so that the quantity of the chemicals cannot be adjusted during the kneading. Therefore, when the amount of the drug is insufficient, the drug must be separately measured and added, but in that case, a powder mixing device or a liquid mixing device is additionally required, which is not realistic.

On the contrary, when the amount of the above-mentioned chemicals is large, it is necessary to add the powder or water and then mix them. In that case, the powder or liquid mixing device and each container are made larger than necessary. There must be. In short, in the continuous kneading apparatus of the conventional example, the gel time cannot be adjusted during operation as in the case of the batch type, so that a suitable kneaded material corresponding to changes in the work site cannot be manufactured.

In view of the above circumstances, an object of the present invention is to make it possible to adjust the supply amounts of a liquid substance and a liquid medicine during kneading.

[0010]

SUMMARY OF THE INVENTION The present invention is a method for continuously producing a kneaded product by mixing a powder, a liquid substance, and a liquid medicine; controlling the supply amounts of the liquid substance and the liquid medicine individually. It is characterized by doing.

The present invention relates to a method for continuously producing a kneaded product by supplying powder, a liquid substance, and a liquid drug, which are separately stored, to a kneading means to mix them, and the liquid substance is continuously produced during the continuous kneading. It is characterized in that the gel time is adjusted by adjusting the supply amount of the liquid medicine and the supply amount of the liquid medicine.

The present invention relates to a continuous kneading device for continuously producing a kneaded product by supplying a powder, a liquid substance and a liquid chemical to a kneading device; a powder tank, a liquid substance tank and a liquid tank connected to the kneading device. It is characterized by comprising a liquid medicine tank, and a control means for individually controlling the supply amount of each tank.

The present invention relates to a continuous kneading device for continuously producing a kneaded material by supplying a powder, a liquid material and a liquid chemical to a kneading means; a powder tank, a liquid material tank, and a tank connected to the kneading means. It is characterized by comprising a liquid medicine tank and a control means for individually controlling the supply amount of each tank and adjusting the gel time during continuous kneading.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a powder, a liquid substance, and a liquid medicine are contained in separate tanks, and the supply amount from each tank is controlled separately. Therefore, in this continuous kneading device, the supply amount of the liquid chemical can be individually adjusted even during operation, so that a desired amount of the kneaded product having desired physical properties such as gel time can be obtained.

[0015]

Embodiments of the present invention will be described with reference to FIGS. The powder F is stored in the powder tank 1. Examples of the powder F include, for example, cement such as Portland cement, alumina cement, colloidal cement, fly ash cement, blast furnace cement, ecocement, pozzolanic substance, latent hydraulic substance such as slag powder, cement-based solidifying material, and rapid hardening. Powder admixtures (materials) such as agents and cement expanders,
Fine aggregate or a mixture of two or more kinds of these is used. A fixed quantity supply device 2 is provided below the powder tank 1. The device 2 is driven by a motor 2m and supplies the powder in the tank 1 to the vertical mixer 10 in a fixed quantity.

The outlet 1b of the powder tank 1 has a vertical mixer 1
0 is connected to the upper inlet 10a. The mixer 10 is
A casing main body 11, a rotary shaft 12 concentric with the casing main body 11, and blades 13 fixed to the rotary shaft 12.
15 and. The rotating shaft 12 is a motor 10
Rotate by m.

An upper part 10A of the casing body 11 is formed in an inverted truncated cone shape, and a single blade 13 is housed in the upper part 10A. The single blade 13 rotates in the upper portion 10A to uniformly distribute the powder F supplied from the powder tank 1.
Drop into 1B.

The body 11B is formed in a straight tube shape, and the stirring blade 14 is housed in the body 11B. A lower portion 11C of the casing body 11 is formed in a cylindrical shape having a diameter smaller than that of the body portion 11B, and a comb tooth-shaped baffle plate 11D is provided on an inner surface of the lower portion 11C and corresponds to a space part of the baffle plate 11D. Thus, the kneading blades 15 are arranged. The lower portion 11C faces the lower tank 16 and
An outlet 16b is provided on the upper part of the.

A mixed liquid inlet 18 is provided on the lower side of the body 11B.
Is provided. As shown in FIG. 3, the mixed liquid inlet 18 is tangential and inclined upward. This inclination angle θ is determined as necessary, but for example,
The inclination angle θ is selected to be 1 degree to 30 degrees.

In the liquid material tank 20, the liquid material W, that is,
It contains a liquid and has fluidity.
As the liquid material W, for example, a liquid such as water or a solution, a suspension, a suspension, an emulsion, a paste, or the like is used. The outlet of the liquid material tank 20 is connected to the inlet of a pump 21 equipped with a motor 21m, and the outlet of the pump 21 is connected to the mixed liquid inlet 18 via a first pipe 23.

A liquid medicine M is stored in the liquid medicine tank 30. Examples of the liquid medicine M include a setting agent such as a quick-hardening material containing a quick-setting agent and a retarder, a dispersant, and the like.
Gel time adjuster, swelling agent, anticorrosive agent, antifreeze agent, coloring material,
Admixtures and admixtures such as a heat of hydration inhibitor, a thickener, a water retention agent, a shrinkage reducing agent, a cement polymer, a filler, and an inseparable admixture in water are used.

The outlet of the liquid medicine tank 30 is connected to the inlet of a pump 31 equipped with a motor 31m, and the outlet of the pump 31 is connected to a merging portion 33p of the first pipe 23 via a second pipe 33. There is. The liquid substance W in the liquid substance tank 20 and the liquid drug M in the liquid drug tank 30 are mixed in the merging portion 33p to form a mixed liquid W · M, which is pressure-fed to the mixed liquid inlet 18.

The outlet 16b of the lower tank 16 is connected to a diaphragm pump 41 with a motor 41m via a retention tank 40. The diaphragm pump 41 is a pressure feeding device and is connected to the nozzle 55 via the flowmeter 50.
The flow meter 50 detects the discharge amount of the kneaded material 100 from the pump 41.

The control panel 60 is provided with a computer 61, and the computer 61 has a fixed amount supply device 2
2m, the vertical mixer 10 motor 10m, the diaphragm pump 41 motor 41m, the pump 21 motor 21m, and the pump 31 motor 31m are respectively connected via inverters. An operation panel 70 is connected to the computer 61. This panel 70 has a start button 71 for starting kneading.
A washing button 72 for starting washing with water and a stop button 73 for stopping the operation are provided.

Next, the operation of this embodiment will be described.
Using the operation panel 70, set amount of water (liquid material W) (100
%, The additive (liquid medicine M) is set as a ratio. Then, the computer 61 automatically sets the flow rates of the two liquids.

When the start button 71 of the operation panel 70 is pressed, each motor is started, and the powder F is fed into the vertical mixer 10 in a fixed amount from the powder tank 1 and the liquid material W in the liquid material tank 20 is supplied. , Liquid medicine M in the liquid medicine tank 30
Is also supplied to the mixer 10.

Powder F flowing into the upper portion 10A of the mixer 10
Falls into the body portion 11B while being scraped off by the single blade 13. The liquid substance W and the liquid drug M are mixed in the mixing portion 33p to form a mixed liquid W · M, which is pressure-fed from the mixed liquid inlet 18 into the mixer 10. At this time, since the mixed liquid inlet 18 is tangential and inclined upward, the mixed liquid W
The M rises along the inner surface of the body 11B while forming the swirling flow A10, and is mixed with the powder F. Therefore, the body 11
Since the inner surface of B is washed by the swirling flow A10, the powder F
Can be prevented from adhering to the inner surface.

The kneaded material 100 produced by mixing and stirring in the body portion 11B drops into the lower tank 16 while being further stirred by the kneading blade 15, and is supplied into the retention tank 40 from the outlet 16b.

The kneaded material 100 in the retention tank 40 is pressure-fed to the nozzle 55 by the diaphragm pump 41. At this time, the amount of the kneaded material 100 fed under pressure is measured by the flow meter 50, and the measured value is sent to the computer 61. When the measured value and the preset design value do not match, the computer 61 determines that the motor 41m, the motor 2m, the motor 10m, the motor 21m, and the motor 31m.
The diaphragm pump 41, the constant quantity supply device 2, the pump 21, the pump 31, and the vertical mixer 10 are changed by changing the rotation speed of
And adjust so that the discharge amount of the kneaded material becomes the designed value.

When the environment suddenly changes during continuous kneading, for example, when the injection material leaks from a crack in the rock during the ground injection material construction, a setting time adjusting agent (gel time) supplied from the liquid chemical tank 30 is used. The amount of the modifier is instantly increased (in the case of a curing accelerator) or decreased (in the case of a retarder), and a kneaded product having a short setting time and a short gel time is produced and supplied. This can prevent the injection material from leaking.

After the injection material has stopped leaking, the supply amounts of the liquid material and the liquid medicine are adjusted again to restore the gel time of the kneaded material to the original value. In this way, the gel time can be adjusted freely according to the environment of the work site.

When the kneading operation is completed, the stop button 73 is pressed to stop the operation. After the operation is stopped, the washing button 72 is pressed to wash the mixer 10 and the like with water. When the button 72 is pressed, the motors 21m, 41m, 10m are started, and the water W in the liquid material tank 20 is injected into the mixer 10. At this time, since the motor 10m rotates at a higher speed than during kneading, the water W efficiently removes the powder F adhered to the blades 13 to 15, the body portion 11B, the baffle plate 11D and the lower tank 16. Further, since the mixed liquid inlet 18 is tangential and inclined upward, the water W rises while swirling along the inner surface of the body portion 11B to wash away the kneaded material adhering to the inner surface.

The water W in the mixer 10 flows down into the retention tank 40 and is discharged from the nozzle 55 via the diaphragm pump 41. Therefore, the diaphragm pump 41, the flowmeter 50, the nozzle 55, etc. are washed with the water W to remove the kneaded material.

The embodiment of the present invention is not limited to the above, and may be, for example, as follows. (1) The powder may be kneaded with water and one or more liquid admixtures. (2) Two continuous kneading devices are provided, and one of the continuous kneading devices is used to prepare a mixture by mixing the powder setting time adjusting agent, water and one or more liquid admixtures. Alternatively, the hydraulic powder mixture kneaded by the other continuous kneading device may be mixed and kneaded with the mixture.

(3) Two continuous kneading devices are arranged, and the operation panel of each device is connected via the interlocking switching button. When this button is pressed to switch to the interlocked operation, the operation of the other device can be simultaneously performed by operating the operation panel of the one device. Therefore, only by instructing the start or stop of the operation from one operation panel, the other device is also started or stopped.

[0036]

Since the present invention is constructed as described above, it is possible to individually adjust the supply amounts of the liquid substance and the liquid medicine. Therefore, it is possible to obtain a kneaded product having a desired physical property value such as gel time by adjusting the supply amount of the liquid substance and the supply amount of the liquid drug even during operation and obtaining a kneaded product having an arbitrary mixing ratio. .

[Brief description of drawings]

FIG. 1 is a flow chart showing an embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view of a vertical mixer.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG.

[Explanation of symbols]

1 powder tank 10 Vertical mixer 20 Liquid tank 21m motor 30 Liquid drug tank 31m motor 40 retention tank 50 flow meter 60 control panel 70 Control panel 100 kneaded products

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) B28C 5/16 B28C 5/16 7/12 7/12 (72) Inventor Makoto Fukuyama 4-8 Nihonbashihonmachi, Chuo-ku, Tokyo No. 15 within Pacific Materials Co., Ltd. (72) Inventor Hidenori Isoda 4-8-15 Nihonbashihonmachi, Chuo-ku, Tokyo Inside Pacific Materials Co., Ltd. (72) Inventor Shoji 2-15-2 Konan, Minato-ku, Tokyo Stocks Obayashi Corporation Tokyo Head Office (72) Inventor Satoru Matsui 3-8-1, Nishikanda, Chiyoda-ku, Tokyo F-term in Daiheiyo Material Co., Ltd. (reference) 4G035 AA23 AA28 AB46 AE02 AE13 4G037 AA02 AA03 AA18 BA05 BB01 BB15 BB23 BC04 BD05 BE02 EA04 4G056 AA07 CB35 CC12 4G078 AA10 AA11 AA20 AB01 BA05 BA09 BA11 CA01 CA05 CA12 CA20 DA01 DA03 DA28 DA30 DB01 EA10

Claims (10)

[Claims] 1. A method for continuously producing a kneaded product by mixing a powder, a liquid and a liquid medicine; continuous kneading, wherein the amounts of the liquid and the liquid medicine supplied are individually controlled. Method. 2. A method for continuously producing a kneaded product by supplying a powder, a liquid substance, and a liquid drug, which are separately stored, to a kneading means to mix them, and to supply the liquid substance during continuous kneading. A continuous kneading method, characterized in that the gel time is adjusted by adjusting the amount and the supply amount of the liquid medicine. 3. The continuous kneading method according to claim 1, wherein the total supply amount of the liquid substance and the liquid medicine is controlled to be constant. 4. The continuous kneading method according to claim 1 or 2, wherein the liquid substance and the liquid medicine are mixed in advance before mixing with the powder. 5. A continuous kneading apparatus for supplying a powder, a liquid and a liquid medicine to a kneading means to continuously produce a kneaded material; a powder tank, a liquid material tank and a liquid medicine connected to the kneading means. A continuous kneading apparatus comprising: a tank; and a control unit that individually controls the supply amount of each tank. 6. A continuous kneading apparatus for continuously producing a kneaded product by supplying a powder, a liquid and a liquid medicine to the kneading means; a powder tank, a liquid material tank and a liquid medicine connected to the kneading means. A continuous kneading apparatus comprising: a tank; and a control unit for individually controlling the supply amount of each tank and adjusting a gel time during the continuous kneading. 7. The liquid material tank and the liquid chemical tank,
7. The continuous kneading device according to claim 5 or 6, wherein the continuous kneading device is connected to the kneading means via a merging means. 8. The continuous mixer according to claim 5, wherein the kneading means is a vertical mixer having a powder supply port provided on an upper portion and a mixed liquid inlet provided on a body part. Kneading equipment. 9. The continuous kneading device according to claim 8, wherein the mixed liquid inlet is provided so as to be inclined in a tangential direction and upward. 10. A method for continuously kneading a kneaded material by the continuous kneaded material manufacturing apparatus according to claim 5 or 6, wherein two kneaded material continuous manufacturing apparatuses are provided, and one of the apparatuses is used. , A powder setting time adjusting agent, water and one or more liquid admixtures are mixed to produce a mixture, and the hydraulic mixture of the other powder is kneaded by the device. A continuous kneading method which comprises kneading and kneading.