JPS62284706A - Kneading feeder for cement group kneaded liquid, etc. - 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 3. Detailed Description of the Invention A. Field of Industrial Application The present invention relates to a kneading and supplying apparatus used for manufacturing and supplying cement kneading liquid and the like for construction work.

The earth-retaining wall around the prepared hole that accommodates the underground part of conventional technology buildings is made up of cement [C] and bentonite [
It consists of a continuous column row wall made by injecting a cement-based kneading solution made by kneading B] with water and kneading it with excavated soil and solidifying it. In this case, since the area around the excavation hole has hardness and softness depending on the strata, it is uneconomical to inject a kneading solution containing gold in a fixed proportion of [C] and [B] over the entire length of the hole according to the hard stratum. Therefore, the example is
A kneading solution containing a large amount of [C] and [B] is injected into the layer section 32 that requires the first reinforcement, and the kneading solution is used depending on the hardness and softness of the ground. However, in the conventional cement-based kneading liquid kneading and supplying device, there is only one stirring tank for storing the kneading liquid per mixer, so whenever the area around the excavation hole becomes hard or soft, (C][
B] The different kneading solutions in 1 must be kneaded one by one in a mixer and then supplied to the stirring tank, which has the disadvantage of complicating the operation and shutdown of the equipment. When reaching the dividing point, even if the previously used kneading liquid remains in the stirring tank, the kneading liquid to be used from now on is supplied from above, so the intermediate blended kneading liquid reaches the hard/soft part. As a result, the optimum kneading liquid could not be injected into the drilled hole in response to hardness and softness immediately and finely.

C. Problems to be Solved by the Invention The present invention has been made by paying attention to the problems of the prior art mentioned above. The purpose of the present invention is to provide a kneading supply device for kneading liquid, etc.

2. Means for Solving the Problems The kneading and supplying device for cement-based kneading liquid, etc. of the present invention, as illustrated in FIG. Weighing conveyors 1 and 2 and water supply device 9 that supply kneaded materials according to the blending amount set by
is connected to the mixer 3, and a plurality of stirring tanks 1o and 11 are provided below the mixer 3, and the mixer 3 and each stirring tank are connected via a distribution valve 12, and a liquid level detection device is installed in each stirring tank. Means 21 and 22 are provided, and the self-stirring tank can be replenished with the same amount of kneading liquid as the kneading lFL (M is N) of the same stirring tank according to the liquid level detection signal of the means, and which one is used for kneading in one stirring tank. The liquid (M or N) can be discharged via a selection valve 14.

E. Function: When the mixing amount setting means sets a mixing amount with a large amount of [(l[EN], the weighing conveyors 1 and 2 and the water
These kneaded materials and water are then put into mixers 3 & 2 and kneaded to form a kneading liquid M.

Then, the distribution valve 12 rotates, and the kneading liquid M in the mixer is supplied, for example, to the left stirring tank 10 until it reaches the optimum liquid level H1. When this supply is finished, [C
] [The blending amount with a small amount of Bl is set, the measuring conveyors 1 and 2 and the water supply device 9 operate again, and the kneaded material and water are fed into the mixer 3 and kneaded, and the distribution valve 12 turns in the opposite direction to release the kneaded liquid. N is supplied to the right stirring tank 11 until it reaches the optimum liquid level H1. Figure 7 (
When constructing a retaining wall by sequentially excavating continuous holes 30 in the ground as shown in Figure 7(b), if the excavated portion is in the hard layer 31, it will be in the neutral position. Selection valve 14
is turned to send the kneading liquid M in the left stirring tank 10 to the grout pump 15, and the pump is operated. As a result, the kneading liquid M is sent from the auger to the hard bed section 31 and mixed with earth and sand.

When the auger reaches the soft layer section 32, the selection valve 14 is turned in the opposite direction to the above to send the kneading liquid N from the right stirring tank 11 to the soft layer section and mix it with the earth and sand. During the above work, for example, the stirring tank 10 on the left
Kneading/[When M decreases and the liquid level reaches the replenishment liquid level H2, the liquid level detection means 21 detects this, and the control device 20 operates according to this detection signal, and the same as last time [C] CB] and water are put into the mixer 3, and the Niimi paste M is replenished into the stirring tank 10 via the distribution valve 12. Even when the liquid level of the kneading liquid N in the right stirring tank 11 falls to the replenishment liquid level H2, the Niimi mixing liquid N is replenished into the stirring tank 11 by the same action.

Embodiment Embodiment 1 of the present invention will be explained in detail with reference to FIGS. 1 to 4. In Figure 1, 1 and 2 are for the cement component Ccl and for the bentonite component [
B] is a weighing conveyor whose discharge ports la and 2a are connected to the input port 4 of the mixer 3. 5 and 6 are small capacity hoppers that supply [C] and [Bl to the weighing conveyors 1 and 2, respectively, and [C] and [Bl] are supplied from separate supply devices, respectively.
[B] is replenished, but the heights of [C] and [Bl in the hopper are detected by capacitance level sensors 5a and 6a, and the amounts are controlled to approximately fall within a certain range. Therefore, [C], [Bl is each hopper], and the constant weight G' [
Transport Bl. 7 and 8 are weighing conveyors 1 and 2, respectively.
is an AC variable speed electric motor that rotates the speed setters 7a and 8.
The rotation speed is adjusted by a. Instead of the electric motors 7 and 8, an electric motor with a mechanical continuously variable transmission may be used. Reference numeral 9 denotes a water supply device, in which an electric submersible pump 9b is installed in a water tank 9a, and a water supply pipe 9c is connected to the input port 4 of the mixer 3. Tl and T2 are a set of rudder electric motors 7,
8, T3 is a timer that determines the operating time of the submersible pump 9b, and T4 is a timer that determines the operating time of the motor 3a of the mixer 3.

[,C] to be fed through weighing conveyor 1 is given by the number of rotations of the same conveyor as n1 operating time, then Gxnxt=
cc] In addition, [B] fed by the weighing conveyor 2 is G'x, where the number of revolutions of the conveyor is n/ and the operating time is
n'xt'=[B]. The above input amount [cl([B]) is n (n')
Adjustment is made by keeping -10,000 of t(t') constant and making the other variable. Speed setting device 7a of the surface AC type variable speed electric motor 7, 8,
+3a and timers TI and T2 are the blending amount CC of the kneading material.
][B]. In addition, when setting the compounding amount of 0 minute and B part, load cells are provided in the openings 5 and 6, and the compounding amount is determined once. It is also possible to take only a predetermined weight into the bottle and put the whole amount into the mixer. Reference numerals 10 and 11 denote left and right stirring tanks respectively placed after the mixer 3, and the kneading liquid M containing a large amount of [cl[B] and [C][B : ] is supplied. Reference numeral 13 denotes a stirring propeller that constantly rotates on the bottoms of both stirring tanks to prevent the kneaded [C] and [B] from sinking.

14 are pipes 14a and 14b from the bottom of each stirring tank.
is connected to the pipe 14c to select the kneading liquids M and N.
This is a selection valve that supplies grout from the grout pump 15. As shown in FIG. 2, this selection valve 14 is a 3-point, 3-position rotary valve, and although the supply of kneading liquid is stopped at the neutral position in the figure, the rotor 15 is rotated in the direction of arrow 15a. ,
When the ports 16 and 19 of the casing 18 are brought into communication, a kneading liquid M of 10 yen in the stirring tank flows from the pipes 14a to 14c and is supplied to the pump 15. Also, arrow 15. When the rotor 15 is rotated in the opposite direction to a, the pipe 14b, port 17, port 19, and pipe 14c are communicated with each other, and the kneading liquid N in the stirring tank 11 is supplied to the grout pump 15. Distribution valve 12 is of similar construction, but the flow is reversed. Note that these valves are operated by pneumatic cylinders. 20 is an electro-pneumatic control device whose main part is a microcomputer;
．． Reference numeral 22 denotes liquid level detection means consisting of level sensors provided in the stirring tanks 10 and 11, respectively. As this level sensor, a conductive level switch, a limit switch operated by a float, or the like is used.

At the beginning of operation of the device, each stirring tank 10, 11 has 1
Four batches of kneading liquids M and N are supplied as batch 2001. In this case, as shown in FIG. 3, the liquid level reaches the optimum liquid level H1. For example, when the kneading liquid M in the left stirring tank 10 is put to practical use by the earth auger and the liquid level drops, and the replenishment liquid level H2 is detected by the liquid level detection means 21, this detection signal G causes the control device The kneading liquid M is manufactured again in accordance with the sequence control executed by 20. That is, to explain with reference to the operation chart in FIG. 4, when the liquid level detecting means 21 outputs a detection signal of the liquid level H2, the weighing conveyor 2 rotates for a certain period of time, and the amount of bentonite [B] required to obtain the kneading liquid M is calculated. The mixture is put into the mixer 3, water is simultaneously supplied from the water supply device 9 for a certain period of time, the mixer 3 is operated, and only [B] is mixed with water. The pennite component has the property of increasing viscosity and swelling with water, but if it is added and kneaded together with the cement component [C], this property will not be fully utilized and a kneaded product will be obtained, so first knead with water as described above. When this water mixing is almost completed, the weighing conveyor 1
is rotated for a certain period of time, and the cement component [C] is put into the mixer 3 and kneaded together with the previously frozen water [B.] to obtain a kneading liquid M. Then, the mixer 3 stops operating, the distribution valve 12 opens to the left for a certain period of time, and the left stirring tank 10 is replenished with the kneading liquid N1. In the kneading solution M obtained by straining G as described above, the bentonite component CB] is sufficiently swollen and kneaded with the cement component [IA] in a state where the viscosity has increased, so the proportion of [C] (B) in the total amount of the solution I In this invention, the use of the kneading liquid is changed by changing the stirring tank, so the mixer always has enough time for kneading, so the above-mentioned kneading is possible.Of course, [ It goes without saying that C] and [B] may be added at the same time and kneaded in the mixer 3.Liquid level detection means 22
detects the replenishment liquid level H2, and the kneading liquid N is transferred to the right stirring tank 11.
The same operation as described above is also performed when replenishing. When replenishing the above kneading solution, two batches of kneading solution M (N
) is replenished into the stirring tank 10 (11), the liquid level rises to the optimum liquid level H1, but if the kneading liquid is in use, the liquid level is located between H1 and H2.

What is shown in FIGS. 5 and 6 is the stirring tank of Practical Example 2, which consists of three types.
For example, a kneading liquid consisting only of [C] can be put in the stirring tank 25, and the pneumatic cylinder 26a,
Selection valve 2 opened and closed by 27 b and 28 b
6.27.28 allows one kneading liquid to be taken out from each stirring tank 23, 24.25. The distribution valve for supplying the kneading liquid from the mixer 3 to each stirring tank is also similar to the selection valve, but the flow is reversed.

G. Effects of the Invention The present invention is as described above, and a plurality of stirring tanks are provided after the mixer, and kneading liquids with different amounts of kneading materials can be stored in each stirring tank, so that the kneading liquid can be reduced. Since the kneading solution in the same amount can be replenished and the kneading solution in one stirring tank can be taken out through the selection valve, the supply of the kneading solution to be used can be quickly and smoothly switched. For example, it is possible to input the desired distribution of [C] and [B] kneading liquids in accordance with the hardness and softness of the strata in the excavation hole, and there is no need to hastily knead the next replenishment kneading liquid with a mixer when changing over. , it is possible to obtain an ideal kneading solution that has been kneaded for a sufficient amount of time.

[Brief explanation of drawings]

FIG. 1 is a simplified front view of Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of a selection valve used in the same, and FIG. 3 is an explanatory diagram of the liquid level detected by the liquid level detection means of the stirring tank in the above. , Fig. 4 is an operation chart of the main parts of the above, Fig. 5 is a plan view of the three-type stirring tank of Example 2, Fig. 6 is a circuit diagram of the selection valve of the above, and Fig. 7 (a) (
b) is a plan view of a continuous hole drilled by an earth auger and a vertical cross-sectional view of a circumference, respectively.

Claims (1)

[Claims] A means for setting the blending amount of the kneaded materials, a measuring conveyor and a water supply device for transporting the kneaded materials according to the set blending amount by the means are connected to the mixer, and a plurality of stirring tanks are provided below the mixer, and the mixer The and each stirring tank are connected via a distribution valve so that kneading liquids containing different amounts of kneading materials can be separately supplied to each stirring tank, and each stirring tank is provided with a liquid level detection means. The self-stirring tank can be replenished with the same amount of kneading liquid as the kneading liquid in the same stirring tank according to the liquid level detection signal of the means, and the kneading liquid in any one of the stirring tanks can be discharged through the selection valve. A kneading and supplying device for cement-based kneading liquid, etc., characterized in that: