JPH022610B2 - - Google Patents

Description

Detailed Description of the Invention "Object of the Invention" (Industrial Application Field) The present invention provides a method for pre-mixing a powdery material or a viscous material by spraying it to a powder or viscous material that is continuously supplied in a fixed amount. The present invention relates to a continuous injection kneading device equipped with a preliminary mixer that enables continuous and accurate kneading with a kneader.

(Prior technology) In the field of civil engineering, mud preparation and preparation for continuous walls, impermeable walls, etc. during underground excavation have traditionally been carried out in batches, but it takes approximately It took a whole day and a night, and if there was surplus, it had to be discarded, and if there was a shortage, construction had to be stopped, resulting in a lot of loss of time and materials, making it very uneconomical.

In particular, when cement, etc. is uniformly and continuously dispersed and kneaded into waste soil, waste mud water, etc. generated from underground excavation, etc., conventionally, cement tends to form so-called "mamako" and it is difficult to mix it continuously and continuously. This is due to the inability to mix properly.

(Problem to be solved by the invention) First, we made the liquid flow down as an annular overflow membrane, and the powder that was continuously supplied in a fixed amount was spread out and collided with this, and mixed with a rotating mixing disk. He proposed a continuous mixing method and the most suitable equipment for its implementation (for example, Japanese Patent Publications Nos. 48-22511 and 53-38828).
No. 55-32755, No. 57-9844, etc.)
It is conceivable to apply this technology to the mud production and mud conditioning described above.

However, as mentioned above, when used as a continuous kneading device for mud preparation and mud conditioning, the material may be powder such as cement or highly viscous material such as backfilling filler. Therefore, it is necessary to provide functions that can respond to these needs.

The present invention has been made from this point of view, and its purpose is to solve the above-mentioned drawbacks of the prior art and to make it possible to mix powders and liquid materials even when the materials are powder or highly viscous. An object of the present invention is to provide a continuous injection kneading device equipped with a preliminary mixer capable of continuously and accurately kneading .

"Structure of the Invention" (Means for Solving the Problems) A continuous injection kneading device equipped with a premixer according to the present invention consists of a premixer A and a kneader B disposed below the premixer. The mixer A includes a screw conveyor-type transfer section 1 equipped with a screw conveyor 6 for transferring a powder or granular material or a viscous material supplied in a fixed quantity to a receiving port 4 provided at one end to an outlet 5 side; A shaftless screw type mixture 10 is disposed on the lower side of the screw conveyor type transfer section 1 and is equipped with an inlet 8 for receiving the material falling from the outlet 5 side, and is for transferring to the next stage kneading machine B side. and a liquid supply port 11 provided near the inlet 8 and arranged at an angle to inject the liquid obliquely to the falling material. The kneading machine B includes a rotary mixing board 23 rotatably disposed in a kneading chamber 21 having a receiving port 24 for receiving the material dropped from the premixer A.
, a plurality of upper surface scrapers 25 provided on the rotating mixing board 23 so as to rotate along the lower surface of the substrate 22 , a plurality of kneading pins 26 also installed on the rotating mixing board 23 , and a plurality of kneading pins 26 installed on the rotating mixing board 23 so as to rotate along the lower surface of the substrate 22 . and a side scraper 27 that is provided in the mixing chamber and rotates along the inner wall of the mixing chamber.

Further, a scraping blade 30 may be disposed in the receiving port 24 for scraping off material that may be deposited on the rotating mixing disk 23.

(Function) The powdery material or viscous material supplied in a fixed amount to the receiving port 4 is transferred by the screw conveyor 6 and falls into the inlet 8 of the shaftless screw type mixing transfer section 2 arranged on the lower stage side. At this time, liquid such as mud water is obliquely jetted and supplied to the falling materials from the liquid supply port 11, and is transferred to the next stage kneading machine while being premixed by the shaftless screw mixer 10. In this case, even if the material is powder, it is transported in a sealed state within the screw conveyor type transfer section, so it will not scatter.

The materials dropped and supplied from the preliminary mixer A are scattered and spread by the rotary mixer 23 rotating at high speed in the kneading chamber 21. At this time, as the rotary mixer 23 rotates, the upper surface scraper 25 scrapes the substrate. Since a plurality of kneading pins 26 and side scrapers 27 installed in the rotary mixing disk rotate along the lower surface of the kneading pins 22, the action of these scrapers and the passing shear caused by the material passing between the kneading pins 26 are After the ingredients are thoroughly kneaded by force,
The mixture is discharged from the drop port 29 by a kneading type scraper blade 35 arranged at the bottom of the kneading chamber 21 .

Depending on the material, it may accumulate near the center of the rotating mixing board 23 after falling from the receiving port 24, but this can be properly scraped off by the scraping blades 30, and the material can be deposited in the direction in which centrifugal force acts. can be moved to

(Example) An example of a continuous injection kneading apparatus equipped with a premixer of the present invention will be explained based on the drawings. FIG. 1 is a sectional view, FIG. 2 is a side view, and FIG. 3 is a premixer. FIG. 4 is a sectional view showing the vicinity of the center of the rotating mixing disk.

The preliminary mixer A is composed of a screw conveyor type transfer section 1 and a shaftless screw type mixing transfer section 2 disposed below the screw conveyor type transfer section 1.
The screw conveyor type transfer section 1 is provided with a receiving port 4 at one end of the transfer tube 3 and an outlet 5 at the other end, and a powder is provided in the transfer tube 3 in a fixed quantity to the receiving port 4. Screw conveyor 6 for transferring granular or viscous material to the outlet 5 side
is located. In the shaftless screw type mixing transfer section 2, an inlet 8 communicating with the outlet 5 is formed in a mixing tube 7 symmetrically arranged at the lower stage of the transfer tube 3, and the inlet 8 corresponds to the receiving port 4. A material supply port 9 to the lower kneading machine B is formed below the position, and a shaftless screw type mixer 10 is arranged within the mixing cylinder 7. A liquid supply port 11 is arranged in a downwardly inclined manner near the inlet 8, and is configured to spray liquid such as muddy water obliquely onto the falling material. In the figure, 12 is a chain wheel for rotating the screw conveyor 6, and 13 is a chain wheel for rotating the shaftless screw type mixing transfer body 10, respectively. However, in the embodiment, the screw conveyor 6 is rotated at 100 rpm, and the shaftless screw type mixing conveyor 10 is rotated at 300 rpm.
It is set to rotate respectively.

The kneading machine B to be placed at the lower stage of the premixer A has a kneading chamber 21 covered with a substrate 22,
A receiving port 24 communicating with the material supply port 9 is provided. A plurality of upper surface scrapers 25 are attached to the rotating mixing disk 23 at the same circumferential angle, and in this embodiment, three are radially arranged so as to rotate along the lower surface of the substrate 22 as the rotating mixing disk rotates. It is designed to scrape off material that may adhere to the bottom surface of the substrate. Furthermore, the above rotating mixing board 2
A plurality of side scrapers 27 (three in this embodiment) are attached radially around the mixing chamber 3 so as to scrape and rotate along the inner wall of the kneading chamber 21, and scrape the top surface of the rotating mixing board 23. A large number of mixing pins 26 are implanted in the.

The kneading chamber 21 has a cylindrical portion 28a and a conical portion 28b.
The bottom of the kneading chamber 21 is formed into a valley shape by the body part 28 and the bottom member 34 having a conical part 34a. Reference numeral 35 denotes a kneading type scraping blade attached to the lower surface of the rotary mixing board 23, the shape of the lower end of which corresponds to the trough-like bottom of the kneading chamber 21; A discharge port 29 is formed in the portion.

Reference numeral 30 denotes a scraping blade disposed at the receiving port 24, which is designed to scrape off materials that tend to accumulate since the receiving port is located near the center of the rotating mixing board 23. There is a support member 30a extending from the substrate 22.
It is supported diagonally by. Reference numeral 31 denotes a shaft of the rotating mixing disk 23, which is supported by a bearing 32 and rotates at high speed via a pulley 33.

(Effects of the Invention) According to the continuous injection kneading device equipped with the premixer according to the present invention, first, in the premixer A, the powdery or granular material or viscous material that is quantitatively supplied to the receiving port 4 is transferred to the screw conveyor 6. The material is transferred by the holder and falls into the inlet 8 of the shaftless screw type mixing transfer unit 2 arranged on the lower stage side, but liquid such as muddy water is sprayed obliquely from the liquid supply port 11 to the falling material. and can be premixed by a shaftless screw mixer 10. In this case, even if the material is powder, it is transported in a sealed state within the screw conveyor type transfer section, so it will not scatter.

The materials dropped and supplied from the preliminary mixer A are scattered and spread by the rotary mixer 23 rotating at high speed in the kneading chamber 21. At this time, as the rotary mixer 23 rotates, the upper surface scraper 25 scrapes the substrate. Since a plurality of kneading pins 26 and side scrapers 27 installed in the rotary mixing disk rotate along the lower surface of the kneading pins 22, the action of these scrapers and the passing shear caused by the material passing between the kneading pins 26 are After the ingredients are thoroughly kneaded by force,
The mixture is discharged from the drop port 29 by a kneading type scraper blade 35 arranged at the bottom of the kneading chamber 21 . Depending on the material, there is a risk that it will accumulate near the center of the rotating mixing board 23 after falling from the receiving port 24, but this can be properly scraped off with the scraping blades 30 and placed in the direction where the centrifugal force of the rotating mixing board acts. can be moved to

After pre-mixing in this way, it is placed in a kneading machine and thoroughly kneaded, so even if the material is powder or highly viscous, it can be sufficiently kneaded.
Moreover, on the side of the kneading machine B, a high-speed rotating mixing disk creates a negative pressure in the kneading chamber, while in the preliminary mixer, the materials are sealed by the materials themselves, so the materials are continuously transferred and supplied.
Continuous kneading can be performed, making it ideal for making mud, mixing mud, etc.

[Brief explanation of drawings]

The drawings show an embodiment of a continuous injection kneading device equipped with a premixer according to the present invention, in which FIG. 1 is a sectional view, FIG. 2 is a side view, and FIG. 3 is a view of only the premixer seen from another direction. FIG. 4 is a sectional view showing the vicinity of the center of the rotating mixing disk.

Claims (1)

[Scope of Claims] 1. Consists of a premixer A and a kneader B disposed below the premixer A. The premixer A is capable of handling a powder or granular material or a viscous material supplied in a fixed amount to a receiving port 4 provided at one end. A screw conveyor type transfer unit 1 equipped with a screw conveyor 6 for transferring the liquid to the exit 5 side.
and a shaftless screw type, which is disposed on the lower stage side of the screw conveyor type transfer section 1, is equipped with an inlet 8 for receiving the material falling from the outlet 5 side, and is used to transfer the material to the next stage kneading machine B side. Mixture 1
0, and a liquid supply port 11 provided near the inlet 8 and arranged at an angle in order to spray the liquid obliquely onto the falling material. Accordingly, the kneading machine B includes a rotary mixing board 23 rotatably disposed in a kneading chamber 21 having a receiving port 24 for receiving the material dropped from the premixer A.
, a plurality of upper surface scrapers 25 provided on the rotating mixing board 23 so as to rotate along the lower surface of the substrate 22 , a plurality of kneading pins 26 also installed on the rotating mixing board 23 , and a plurality of kneading pins 26 installed on the rotating mixing board 23 so as to rotate along the lower surface of the substrate 22 . A continuous injection kneading device equipped with a pre-mixer, characterized in that it is constituted by a side scraper 27 which is provided in the mixing chamber and rotates along the inner wall of the mixing chamber. 2 Consists of a pre-mixer A and a kneader B placed below it, and the pre-mixer A transfers the powder or granular material or viscous material supplied in a fixed amount to the receiving port 4 provided on one end side to the outlet 5 side. Screw conveyor type transfer unit 1 equipped with a screw conveyor 6 for
and a shaftless screw type, which is disposed on the lower stage side of the screw conveyor type transfer section 1, is equipped with an inlet 8 for receiving the material falling from the outlet 5 side, and is used to transfer the material to the next stage kneading machine B side. Mixture 1
0, and a liquid supply port 11 provided near the inlet 8 and arranged at an angle in order to spray the liquid obliquely onto the falling material. Accordingly, the kneading machine B includes a rotary mixing board 23 rotatably disposed in a kneading chamber 21 having a receiving port 24 for receiving the material dropped from the premixer A.
, a plurality of upper surface scrapers 25 provided on the rotating mixing board 23 so as to rotate along the lower surface of the substrate 22 , a plurality of kneading pins 26 also installed on the rotating mixing board 23 , and a plurality of kneading pins 26 installed on the rotating mixing board 23 so as to rotate along the lower surface of the substrate 22 . a side scraper 27 that is provided at the top and rotates along the inner wall of the mixing chamber; and a scraper that is located at the receiving port 24 for scraping off material that may accumulate near the center of the rotating mixing disk 23. 1. A continuous injection kneading device equipped with a premixer, characterized in that it is constituted by blades 30.