Cement milk manufacturing method in bacher plant

Abstract

To solve the problem that the weight of cement milk is conventionally measured to obtain a desired amount of cement milk, but the weight of the cement milk after being charged is merely measured, and the mixing ratio cannot be accurately grasped, resulting in variation in the quality of the cement milk.SOLUTION: A cement milk manufacturing method in a bacher plant in which a desired amount of water and a setting amount of cement are supplied to a mixer 3 and mixed to obtain a cement milk comprises the steps of: driving a conveyance device 9 of a silo 5 in a normal operation to supply cement to the mixer 3; stopping the conveyance device 9 once after a predetermined time has elapsed; measuring a cement amount in the mixer 3; calculating a cement supply amount per actual hour of the conveyance device 9; and supplying the remaining cement relative to a set value by selecting either normal operation of the conveyance device 9 or an inching operation capable of supplying a small amount of cement so that the remaining amount is equal to or greater than the set value.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a batch yarp plant using a silo, and particularly to a case where the weighing accuracy of powders such as cement and bentonite charged using the silo is required.

Background Art

[0002] Conventionally, a configuration in which a mixer that manufactures cement milk by adding water to cement supplied from a cement storage silo and stirring it, and a weighing instrument that measures the weight of this mixer is provided is known (Patent Document 1). Also conventionally, when charging cement, the amount of cement to be charged into a predetermined amount of water is set in advance, and when charging is stopped in a state where the set value of the set amount of cement is not reached, the cement is added so as to exceed the set value. The charging configuration is known (Patent Documents 2 to 4).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1 of the known example, in order to obtain a desired amount of cement milk, the weight of the cement milk is measured by a weighing instrument, but it simply measures the weight of the cement milk after water and cement are charged. There is a problem that the mixing ratio of water and cement cannot be accurately grasped, and the quality of the cement milk varies. In addition, in Patent Documents 2 to 4 of the above-mentioned known examples, when the cement supply is stopped in a state where the set value of the set cement amount is not satisfied, when additional supply is performed, the supply to the silo is stopped after exceeding the set value. Therefore, due to the overrun after the stop, a significantly larger amount than the set value may be supplied. And the function of additional supply is effective when it only needs to exceed the set value. However, there is an upper limit value in the allowable range from the set value, and there is a drawback that it exceeds the allowable range when the allowable range is narrow. At the actual site, a standard is provided for the amount of cement used. When the allowable range is narrow, there is a problem that the amount of cement input by the conventional method exceeds the standard. The present invention devises a method for supplying powder (cement) in the manufacturing process of cement milk, and improves the cement supply accuracy.

Means for Solving the Problems

[0005] The invention according to claim 1 is a method for manufacturing cement milk in which water supplied from a water storage tank 8 set to an amount that should become a desired amount of cement milk and a preset amount of cement from a silo 5 are supplied to a mixer 3 and kneaded to obtain cement milk. In this method, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3, and after a predetermined time has elapsed, the conveying device 9 is temporarily stopped. The amount of cement in the mixer 3 is measured, the actual cement supply amount per unit time of the conveying device 9 is calculated, and the remaining cement with respect to the set amount is supplied by selecting either the normal operation or the jog operation capable of minute supply of the conveying device 9 so as to be equal to or more than the set value. This is a method for manufacturing cement milk in a batch plant for manufacturing cement milk. In the invention according to claim 2, the conveying device 9 of the silo 5 is driven by normal operation to convey cement to the mixer 3. Before a predetermined time elapses when the amount of cement will reach an arbitrary amount less than the preset set amount, the conveying device 9 is stopped once. For the remaining cement for the set amount, the conveying device 9 is jogged to supply a minute amount so that the amount becomes equal to or more than the set value, thereby providing a method for manufacturing cement milk in a batcher plant that manufactures cement milk. In the invention according to claim 3, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3. After a predetermined time elapses, the conveying device 9 is stopped once. The amount of cement in the mixer 3 is measured to calculate the actual cement supply amount per unit time of the conveying device 9. When the measured value of cement after the predetermined time has elapsed is far from the set value, normal operation is selected again. When the measured value of cement after the predetermined time has elapsed is close to the total amount set value, jogging operation is selected, and cement is supplied by jogging operation so that the amount becomes equal to or more than the set value, thereby providing a method for manufacturing cement milk in a batcher plant that manufactures cement milk. In the invention according to claim 4, the conveying device 9 of the silo 5 is driven by normal operation to supply a predetermined amount of cement to the mixer 3. After the supply, the amount of cement in the mixer 3 is measured. When selecting either normal operation or jogging operation capable of minute supply of the conveying device 9 to supply the cement so that the amount becomes equal to or more than the set value, finally, the cement is always supplied by jogging operation of the conveying device 9 so that the amount becomes equal to or more than the total amount set value, thereby providing a method for manufacturing cement milk in a batcher plant that manufactures cement milk. In the method for producing cement milk, which supplies water supplied from a water storage tank 8 set to a desired amount to become a desired amount of cement milk and cement supplied from a silo 5 by a conveyor 9 to a mixer 3, kneads them, and obtains cement milk, the drive of the conveyor 9 is such that, with respect to the total amount set value, which is the total amount of cement for a desired cement milk amount, it is set to any predetermined value less than the total amount set value, the supply amount is measured by supplying it by normal operation of the conveyor 9 for a predetermined time, the cement supply amount of the actual conveyor 9 is calculated, a correction value at the time of cement input is set in two steps to a value lower than the set value with respect to the total amount set value of the cement to be supplied to the mixer 3, and the cement is input step by step for each of the two-step correction values. Cement is supplied by the operation of the conveyor 9 of the normal silo 5 until the second correction value of the second stage, and a jogging operation function is mounted to jog the conveyor 9 of the silo 5 after the second correction value of the second stage to supply a minute amount of cement to the mixer 3, and the shortage is configured to be input in minute units by the jogging operation. The correction value is a value for stopping the operation of the silo 5 in advance with a value lower than the set value so as not to exceed the set value by overrun after the silo 5 stops, and it is a method for producing cement milk in a batch plant that repeatedly performs jogging operation of the silo 5 until it becomes equal to or higher than the set value. In the method for producing cement milk, which supplies water supplied from a water storage tank 8 set to a desired amount and cement supplied from a silo 5 to a mixer 3 and kneads them to obtain cement milk, the configuration is such that the supply amount is measured by supplying through normal operation of a conveying device 9 for a predetermined time and the cement supply amount of the actual conveying device 9 is calculated. The total amount of cement to be supplied to the mixer 3 is set with correction values at the time of cement input to be lower than the set value in two stages, and the cement is charged step by step for each of the two-stage correction values. Cement is supplied by normal operation of the silo 5 until the second correction value in the second stage, and a jogging operation function is provided to jog the silo 5 to supply a minute amount of cement to the mixer 3 after the second correction value in the second stage, and the shortage is charged in minute units by the jogging operation. The correction value is a value for stopping the operation of the silo 5 in advance at a value lower than the set value so as not to exceed the set value due to overrun after the silo 5 stops, and it is a method for producing cement milk in a batcher plant that repeatedly performs the jogging operation of the silo 5 until it becomes equal to or higher than the set value. In the invention according to claim 7, among the two-stage correction values, the first correction value is set to a value lower than the set value, the second correction value is set to a value that compensates for the shortage of the previous input, and the difference B between the set value and the second correction value is set to be smaller than the difference A between the set value and the first correction value. When the input using the second correction value ends and the value is still lower than the set value, the jogging operation is repeated, and it is a method for producing cement milk in a batcher plant that repeatedly performs the jogging operation of the silo 5 until it becomes equal to or higher than the set value. The invention according to claim 8 is configured such that water set to a preset amount and an amount to be cement milk is supplied to the mixer 3 of the batch plant 1, a cement amount having a predetermined ratio is calculated based on the amount of water supplied to the mixer 3, and the corrected cement amount is supplied to the mixer 3. The conveying device 9 of the silo 5 that supplies cement stops the supply once when the supply reaches a predetermined value with respect to the total supply amount, measures the supply amount to calculate the actual cement supply amount of the conveying device 9, and then the conveying device 9 of the silo 5 is jogged for fine supply. When jogging the conveying device 9 of the silo 5, a stop time of a predetermined time is always interposed until the conveying device 9 is restarted. This is a method for manufacturing cement milk of a batch plant. The invention according to claim 9 is configured such that an opening / closing valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3. When the silo 5 is stopped, the opening / closing valve 13 is closed, and when the silo 5 is restarted, the opening / closing valve 13 is opened. This is a method for manufacturing cement milk of a batch plant. The invention according to claim 10 is a method for manufacturing cement milk in which water supplied from a water storage tank 8 set to an amount to be a desired amount of cement milk and cement supplied from a silo 5 are supplied to a mixer 3 and kneaded to obtain cement milk. When the total amount of cement to be supplied to the mixer 3 is set as a set value, a predetermined value having a numerical value lower than the set value is set. The silo 5 is driven to normally operate for a time that would reach the predetermined value, then stopped once, the supply amount is measured to calculate the actual cement supply amount of the conveying device 9. When the amount of cement in the mixer 3 after normal operation is the same as or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the jogging operation of the conveying device 9 for fine supply by driving the silo 5 is started. When the amount of cement in the mixer 3 after the jogging operation is the same as or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the jogging operation of the silo 5 is repeated until the amount of cement in the mixer 3 is the same as or exceeds the set value to supply cement. This is a method for manufacturing cement milk of a batch plant. The invention according to claim 11 is a method for manufacturing cement milk in a batcher plant, wherein the jogging operation of the silo 5 is configured such that, after the jogging operation of the silo 5 stops, the amount of cement in the mixer 3 is always measured. The invention according to claim 12 is a method for manufacturing cement milk in a batcher plant, wherein two correction values lower than the set value are set as the predetermined value. Cement is supplied by the normal operation of the silo 5 until the second correction value of the second stage, and the silo 5 is jogged to supply cement after the second correction value of the second stage. The invention according to claim 13 is a method for manufacturing cement milk in a batcher plant, wherein an opening / closing valve 13 is provided in the supply channel 10 for supplying cement from the silo 5 to the mixer 3. When the silo 5 is stopped, the opening / closing valve 13 is closed, and when the silo 5 is restarted, the opening / closing valve 13 is opened. The invention according to claim 14 is a method for manufacturing cement milk in a batcher plant, wherein water set to a preset amount, which is the amount of water to be cement milk, is supplied to the mixer 3. The actual amount of water supplied to the mixer 3 is measured by a weighing instrument 25 as a water measurement value. The water set value and the water measurement value are compared. When they do not match, the amount of cement to be put into the water of the water measurement value is calculated so as to be the ratio of the amount of cement to a predetermined amount of water calculated in advance, and the automatically corrected amount of cement is supplied to the mixer 3. In the invention of claim 15, an opening / closing valve 13 is provided in a supply flow path 10 for supplying cement from the silo 5 to the mixer 3. The supply flow path 10 on the upstream side of the opening / closing valve 13 is configured to be able to store a predetermined amount of cement. When the amount of cement in the mixer 3 is equal to or exceeds the set value after the cement supply is completed by jogging operation, the cement supply is terminated. When the measured value does not match the set value, before jogging the silo 5, the closed opening / closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3. When the amount of cement in the mixer 3 is equal to or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the silo 5 is jogged to supply cement to the mixer 3. After the cement supply, when the amount of cement in the mixer 3 is equal to or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, again, before jogging the silo 5, the closed opening / closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3. Until the amount of cement in the mixer 3 is equal to or exceeds the set value, the opening of the opening / closing valve 13 and the jogging operation of the silo 5 are alternately repeated, which is a method for manufacturing cement milk in a batcher plant.

Effect of the Invention

[0006] In the invention of claim 1, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3. After a predetermined time has elapsed, the conveying device 9 is temporarily stopped. The amount of cement in the mixer 3 is measured, and the actual cement supply amount per unit time of the conveying device 9 is calculated. The remaining cement with respect to the set amount is supplied by selecting either the normal operation or the jogging operation capable of minute supply of the conveying device 9 so as to be equal to or more than the set value. Therefore, it is possible to improve the cement supply accuracy corresponding to the conveying device 9 of each batcher plant. Also, an arbitrary predetermined amount of cement can be supplied by the normal operation of the conveying device 9, and the remaining cement can be supplied in minute amounts by jogging operation. Thus, the supply operation time can be shortened, and the supply amount accuracy can be improved, and both the work efficiency and the improvement of the supply amount accuracy can be achieved. In the invention according to claim 2, the conveying device 9 of the silo 5 is driven by normal operation, and before a predetermined time elapses when the cement will reach an arbitrary predetermined amount less than the preset set amount in the mixer 3, the conveying device 9 is once stopped, and the remaining cement for the set amount is fed in a minute amount by jogging the conveying device 9 so as to be equal to or more than the set value. Finally, since the conveying device 9 is jogged and fed in a minute amount, the supply amount accuracy can be improved. Even if the conveying device 9 of the silo 5 is jogged, damage to each part of the silo 5 can be prevented, and both prevention of damage to each part of the silo 5 and improvement of the cement supply accuracy can be achieved. In the invention according to claim 3, when the cement measurement value after a predetermined time has elapsed is far from the set value, normal operation is selected again, and when the cement measurement value at the elapse of the predetermined time is close to the total amount set value, jogging operation is selected and cement is supplied by jogging operation so as to be equal to or more than the set value. Therefore, both work efficiency and improvement of supply amount accuracy can be achieved. In the invention according to claim 4, the conveying device 9 of the silo 5 is driven by normal operation to supply a predetermined amount of cement to the mixer 3, the amount of cement in the mixer 3 is measured after the supply, and when selecting either normal operation or jogging operation capable of minute supply of the conveying device 9 and supplying so as to be equal to or more than the set value, finally, the cement is always supplied by jogging operation of the conveying device 9 so as to be equal to or more than the total amount set value. Therefore, the supply amount accuracy can be further improved. In the invention according to claim 5, the driving of the conveying device 9 is such that the supply amount is measured by supplying, by normal operation of the conveying device 9 for a predetermined time, an arbitrary predetermined value less than the total amount set value which is the total amount of cement with respect to the desired amount of cement milk, and the actual cement supply amount of the conveying device 9 is calculated. A correction value at the time of cement input is set in two steps to a value lower than the set value with respect to the total amount set value of the cement to be supplied to the mixer 3, and the cement is input step by step for each of the two-step correction values. Cement is supplied by the operation of the conveying device 9 of the normal silo 5 until the second correction value of the second stage, and a jogging operation function is mounted to slightly supply cement to the mixer 3 by jogging the conveying device 9 of the silo 5 after the second correction value of the second stage. The insufficient amount is input in minute units by jogging operation. The correction value is a numerical value for stopping the operation of the silo 5 in advance with a value lower than the set value so as not to exceed the set value by overrun after the silo 5 stops, and the silo 5 is repeatedly jogged until the value becomes equal to or higher than the set value. Therefore, the supply amount of cement does not greatly exceed the cement set value, the supply accuracy can be improved, and accurate and uniform cement milk can be produced. In the invention according to claim 6, at the time of manufacturing cement milk, the amount of cement actually supplied to the mixer 3 is measured, and the insufficient cement is supplied to the mixer 3 by the jogging operation of the conveying device 9 of the silo 5. Therefore, the supply amount of cement does not greatly exceed the cement set value, the supply accuracy can be improved, and accurate and uniform cement milk can be produced. In the invention according to claim 7, among the two-step correction values, the first correction value is a value lower than the set value, the second correction value is a value for compensating for the shortage of the previous input, and the difference B between the set value and the second correction value is set to be smaller than the difference A between the set value and the first correction value. When the input using the second correction value is completed and the value is still lower than the set value, the jogging operation is repeated, and the jogging operation of the silo 5 is repeated until the value becomes equal to or higher than the set value. Therefore, even if there is an overrun after the conveying device 9 stops, the supply of cement can be surely stopped with a slight increase value while exceeding the cement set value, and the cement milk with an appropriate cement content component can be obtained, and the quality of the cement milk can be stabilized. In the invention of claim 8, the conveying device 9 of the silo 5 for supplying cement is configured to stop the supply once the supply reaches a predetermined value with respect to the total supply amount, and then to perform jogging operation of the conveying device 9 of the silo 5 for micro-supply. When performing jogging operation of the conveying device 9 of the silo 5, a stop time of a predetermined time is always interposed until the re-operation of the conveying device 9. Therefore, even if the silo 5 is jogged, damage to each part of the silo 5 can be prevented, the cement supply accuracy can be improved, and the quality of the cement milk can be stabilized. In the invention of claim 9, an opening / closing valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3. When the silo 5 is stopped, the opening / closing valve 13 is closed, and when the silo 5 is re-operated, the opening / closing valve 13 is opened. Therefore, the supply of cement from the silo 5 to the mixer 3 is immediately stopped, and thus there is no cement inflow phenomenon due to inertia when the supply of the silo 5 is stopped, and the cement supply accuracy to the mixer 3 can be further improved. In the invention of claim 10, since the jogging operation of the silo 5 is repeated to supply cement, the cement supply accuracy to the mixer 3 can be improved. In the invention of claim 11, since the amount of cement in the mixer 3 is always measured after the jogging operation of the silo 5 is stopped, the cement conveying drive motor 16 can be stopped and cooled during this measurement time, damage to each part of the silo 5 can be prevented, jogging operation of the silo 5 with a very small amount of cement supply can be realized, and the cement supply accuracy can be improved. In the invention of claim 12, the predetermined value is set to two correction values lower than the set value. Cement is supplied by normal operation of the silo 5 until the second correction value of the second stage, and cement is supplied by jogging operation of the silo 5 after the second correction value of the second stage. Therefore, a very small supply can be surely performed as compared with the normal supply. In the invention according to claim 13, an opening and closing valve 13 is provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3. When the cement conveying drive motor 16 of the silo 5 is stopped, the opening and closing valve 13 is closed, and when the silo 5 is restarted, the opening and closing valve 13 is opened. Therefore, there is no cement inflow phenomenon due to inertia when the supply from the silo 5 is stopped, and the accuracy of cement supply to the mixer 3 can be further improved. In the invention according to claim 14, water set to a preset amount and an amount to be cement milk is supplied to the mixer 3. The amount of water actually supplied to the mixer 3 is measured by a weighing device 25 as a water measurement value. The water set value and the water measurement value are compared. When they do not match, the amount of cement corresponding to a predetermined ratio to the water set value is calculated, and this automatically corrected amount of cement is supplied to the mixer 3. Therefore, the accuracy of cement supply can be further improved. In the invention according to claim 15, after the cement supply (input) by normal operation or jogging operation is completed, when the measured value does not match (is less than) the set value, before jogging the silo 5, the closed opening and closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3. Therefore, a smaller amount of cement than the jogging operation of the silo 5 can be additionally supplied to the mixer 3, and the accuracy of cement supply can be further improved.

Brief Description of the Drawings

[0007]

Figure 1

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Figure 13

Mode for Carrying Out the Invention

[0008] As described with reference to the drawings, an embodiment of the present invention will be described. 1 is a portable batcher plant, 2 is a frame body of the batcher plant 1, and the frame body 2 is provided with a mixer 3 for producing cement milk by stirring water and cement (powder including bentonite), and an agitator 4 for temporarily storing the cement milk produced by the mixer 3 while stirring it so as not to solidify. A silo 5 for storing cement to be supplied to the mixer 3 is provided above the frame body 2 of the batcher plant 1. Therefore, it is preferable that the silo 5 has a specification suitable for slightly supplying cement to the mixer 3 described later. Although not a requirement of the present invention, in this embodiment, an external supply silo 6 for storing cement to be supplied to the silo 5 is provided near the batcher plant 1, and the external supply silo 6 and the silo 5 are connected by a supply transfer hose 7. Therefore, when producing cement milk, the batcher plant 1 is configured to be continuously operable.

[0009] In addition, a water storage tank 8 for storing water to be added to the cement is provided near the batcher plant 1. The configuration of the silo 5 is arbitrary, and it is sufficient that the silo 5 can store cement, and a conveying device 9 may be provided at the bottom inside the silo 5. In addition, if the conveying device 9 is configured to have a large pitch of the screw (helical blade) and a high rotation speed, the input amount during normal operation can be increased, the working efficiency can be improved, and it is also possible to perform a minute supply during the jogging operation described later. Connect the upper part of the discharge hose 11 to the discharge port of the conveying device 9 of the silo 5, connect the cement supply pipe 12 to the lower part of the discharge hose 11, and connect the lower part of the cement supply pipe 12 to the mixer 3. Therefore, the discharge hose 11 and the cement supply pipe 12 constitute a supply flow path 10 that connects the silo 5 and the mixer 3, and an on-off valve 13 is provided in the supply flow path 10.

[0010] That is, on the frame body 2, a mixer 3 for stirring water and cement to produce cement milk, an agitator 4 for temporarily storing the cement milk produced by this mixer 3 while stirring it so as not to solidify, and a silo 5 for supplying cement to the mixer 3 are provided. A water storage tank 8 for storing water to be added to the cement is arranged near the batcher plant 1. A conveying device 9 for discharging the cement in the silo 5 is provided in the silo 5, and an on-off valve 13 is provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3. In addition, the supply flow path 10 on the upstream side of the on-off valve 13 provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3 is configured to be able to store a predetermined amount of cement. 16 is a cement conveying drive motor for driving the conveying device 9 of the silo 5. A cement capacity detector (paddle switch) 14 is provided in the silo 5, and when the cement capacity in the silo 5 decreases, cement is automatically supplied from the external silo 6 to the silo 5.

[0011] The configuration of the water storage tank 8 is arbitrary, and a water supply pump 18 for supplying water to the mixer 3 is provided in the water storage tank 8. A water supply hose 19 is connected to the water supply pump 18, the end of the water supply hose 19 is connected to the starting end of an internal water supply pipe 20 provided inside the frame body 2, and the end of the internal water supply pipe 20 is connected to the mixer 3. An on-off valve 21 that is opened and closed by an actuator (not shown) is provided in the middle of the internal water supply pipe 20, and when a predetermined amount of water is supplied to the mixer 3, the on-off valve 21 is closed, so that the supply accuracy of the supply amount of the supply water supplied to the mixer 3 can be improved. 22 is a water supply motor of the water supply pump 18. The mixer 3 suspends the kneading trough 24 inside the frame body 2 so as to be vertically movable, and a weighing instrument (load cell) 25 is attached to the kneading trough 24. The weighing instruments 25 are installed at three locations in consideration of the weight balance of the kneading trough 24 so that the weight of the kneading trough 24 can be accurately measured, and the weight of the kneading trough 24 is measured by the three weighing instruments 25.

[0012] A stirring blade 26 is suspended from the kneading trough 24, and the stirring blade 26 is rotated by a stirring motor 27. A discharge port 28 for discharging the kneaded cement milk is provided at a predetermined position of the kneading trough 24. 29 is an opening / closing valve. Below the discharge port 28 of the kneading trough 24, the storage trough 30 of the agitator 4 is faced. A rotating blade 31 is provided in the storage trough 30, and a drive motor 32 of the rotating blade 31 is provided above the storage trough 30. 35 is a detector for detecting the amount of cement milk in the storage trough 30 of the agitator 4. A conveying hose 40 for conveying the cement milk is connected to the agitator 4, and a conveying pump (grout pump) 41 for conveying the cement milk is provided at a predetermined position in the middle of the conveying hose 40. Thus, in the present invention, a mixer 3 for stirring water and cement to produce cement milk, an agitator 4 for temporarily storing the cement milk produced by the mixer 3 while stirring it so as not to solidify, and a silo 5 for supplying cement to the mixer 3 are provided on the frame body 2. A water storage tank 8 for storing water to be added to the cement is arranged near the batcher plant 1. A conveying device 9 for discharging the cement in the silo 5 is provided in the silo 5, and an opening / closing valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3.

[0013] Therefore, there is no cement inflow phenomenon due to inertia when the supply of the silo 5 stops, and the accuracy of supplying cement to the mixer 3 can be further improved. Further, the supply passage 10 on the upstream side of the opening / closing valve 13 provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3 is configured to be able to store a predetermined amount of cement. That is, when there is a discrepancy between the measured value and the set value after the cement input is completed, which will be described later, before jogging the silo 5, the closed on-off valve 13 is opened to supply the cement in the supply passage 10 to the mixer 3, thereby supplying a smaller amount of cement to the mixer 3 than during the jogging operation of the silo 5. Thus, when obtaining a desired amount of cement milk, water and cement may be input into the mixer 3 at a predetermined ratio and kneaded, but it was difficult to input a set amount of powder such as cement or bentonite. That is, due to the time lag until the conveying device 9 of the silo 5 stops according to the stop signal of the control unit 45 and the inertial operation until the conveying device 9 stops, the supply accuracy of the amount of cement input and supplied to the mixer 3 was conventionally low.

[0014] In addition, if the drive of the conveying device 9 of the silo 5 is frequently turned on and off, it will lead to damage to each part of the silo 5 including the conveying device 9. Therefore, conventionally, the supply from the silo 5 has not been performed by jogging operation. In the present invention, in a cement milk manufacturing method of supplying water supplied from a water storage tank 8 set to an amount to become a desired amount of cement milk and a set amount of cement previously set from a silo 5 to a mixer 3 and kneading to obtain cement milk, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3, and after a predetermined time (correction value · predetermined value) has elapsed, the conveying device 9 is temporarily stopped. The amount of cement in the mixer 3 is measured, the actual cement supply amount per unit time of the conveying device 9 is calculated, and the remaining cement relative to the set amount is supplied by selecting either the normal operation of the conveying device 9 or the jogging operation capable of minute supply so as to be equal to or more than the set value. The configuration is such that cement milk is manufactured.

[0015] Therefore, it is possible to improve the cement supply accuracy corresponding to the conveying device 9 of each batch plant. In addition, an arbitrary set amount of cement can be supplied by the normal operation of the conveying device 9, and the remaining cement can be supplied in minute amounts by jogging operation. Therefore, the supply operation time can be shortened, the supply amount accuracy can be improved, and both the work efficiency and the supply amount accuracy can be improved simultaneously. Also, drive the conveying device 9 of the silo 5 by normal operation, and once stop the conveying device 9 before a predetermined time elapses when the amount of cement reaches an arbitrary predetermined amount (correction value · predetermined value) less than the preset set amount in the mixer 3, and supply the remaining cement for the set amount by jogging the conveying device 9 to supply it so that it becomes the same as or more than the set value. Therefore, since an arbitrary predetermined amount of cement is supplied by the normal operation of the conveying device 9, the supply operation time can be shortened, and since the remaining cement can be finely supplied by jogging operation, the supply amount accuracy can be improved, and both the work efficiency and the supply amount accuracy can be improved.

[0016] Also, drive the conveying device 9 of the silo 5 by normal operation to supply cement to the mixer 3, once stop the conveying device 9 after a predetermined time has elapsed, measure the amount of cement in the mixer 3, calculate the actual cement supply amount per unit time of the conveying device 9, select normal operation again when the measured value of cement after a predetermined time has elapsed is far from the set value, and select jogging operation when the measured value of cement after a predetermined time has elapsed is close to the total amount set value, and supply cement so that it becomes the same as or more than the set value by jogging operation. Therefore, both the work efficiency and the supply amount accuracy can be improved. Also, drive the conveying device 9 of the silo 5 by normal operation to supply a predetermined amount of cement to the mixer 3, measure the amount of cement in the mixer 3 after supply, select either normal operation or jogging operation capable of fine supply of the conveying device 9, and when supplying so that it becomes the same as or more than the set value, finally supply cement so that it becomes the same as or more than the total amount set value by jogging operation of the conveying device 9. Therefore, the supply amount accuracy can be further improved, and accurate and uniform cement milk can be manufactured.

[0017] In addition, the drive of the conveyor 9 is configured to supply the conveyor 9 by normal operation for a predetermined time so that an arbitrary predetermined value less than the total amount setting value, which is the total amount of cement with respect to the desired amount of cement milk, is measured for the supply amount by measuring the supply amount, calculating the actual cement supply amount of the conveyor 9, setting a correction value at the time of cement input to be lower than the setting value in two steps for the total amount setting value of the total amount of cement to be supplied to the mixer 3, and performing stepwise cement input for each of the two-step correction values. Cement is supplied by the operation of the conveyor 9 of the normal silo 5 until the second correction value of the second stage, and a jogging operation function is mounted to slightly supply cement to the mixer 3 by jogging the conveyor 9 of the silo 5 after the second correction value of the second stage. The configuration is such that the shortage is input in minute units by jogging operation, and the correction value is a numerical value for stopping the operation of the silo 5 in advance with a value lower than the setting value so as not to exceed the setting value by overrun after the silo 5 stops, and the silo 5 is repeatedly jogged until it becomes equal to or higher than the setting value.

[0018] Therefore, the supply amount of cement does not greatly exceed the cement setting value, the supply accuracy can be improved, and accurate and uniform cement milk can be manufactured. The conveyor 9 is configured to operate at the same rotational speed per unit time both in normal operation and jogging operation, and to change the supply amount by changing the drive time. Therefore, since the conveyor 9 operates at the same rotational speed both in normal operation and jogging operation and changes the supply amount by changing the drive time, the control can be facilitated and the cement supply accuracy can be improved. When driving the conveyor 9 for a predetermined time, an arbitrary predetermined value (correction value) less than the total amount setting value with respect to the total amount setting value is set in one or a plurality of steps, and cement is input stepwise for each step. At least until the second predetermined value of the second stage, the conveyor 9 of the silo 5 supplies cement by normal operation, and after the second predetermined value of the second stage, the silo 5 is repeatedly jogged until the shortage amount becomes equal to or more than the total amount setting value.

[0019] Therefore, even if there is an overrun after the conveyance device 9 stops, the supply of cement can be surely stopped with a slight increase value while exceeding the cement set value, and the cement milk with an appropriate cement content component can be obtained, and the quality of the cement milk can be stabilized. Specifically, on the touch panel of the control unit 45, it is possible to set a predetermined value (correction value) for stopping the input of cement before the cement set value, which is a predetermined mixing ratio of cement to water when obtaining a desired amount of cement milk. When the weight in the mixer 3 reaches the first-stage predetermined value, the conveyance device 9 is stopped and the on-off valve 13 is temporarily closed. The time longer than the time until the on-off valve 13 is completely closed can be set on the touch panel of the control unit 45 as the time of the sleep timer, and the timing when the cement in the internal cement supply pipe 12 is completely input into the mixer 3 can be estimated. After the time set by the sleep timer has elapsed, the weight in the mixer 3 is measured. If the cement set value has not been reached, the jog operation of the silo 5 is performed to add the insufficient cement little by little.

[0020] Therefore, until the first-stage and second-stage predetermined values are reached, the conveyance device 9 of the silo 5 is normally operated to shorten the cement input time to the mixer 3. After the second-stage predetermined value, the jog operation is performed to switch to the minute input, improving the supply accuracy of the cement supply amount, and achieving both work efficiency improvement and work accuracy improvement. The time of the jog operation can be set to be long or short. That is, in the present invention, in a cement milk production method of supplying water supplied from a water storage tank 8 set to an amount to become a desired amount of cement milk and cement supplied from a silo 5 to a mixer 3 and kneading them to obtain cement milk, two correction values (predetermined values) lower than the set value are provided for the set value of the total amount of cement to be supplied to the mixer 3, and the cement is charged stepwise so as to reach the two correction values. Cement is supplied by the normal operation of the silo 5 until the second correction value in the second stage, and after the second correction value in the second stage, the silo 5 is jogged to slightly supply cement to the mixer 3, so that the shortage with respect to the set value is charged in minute units. The correction value is set to a value that stops the operation of the silo 5 at a value lower than the set value in advance so as not to exceed the set value by overrun after the silo 5 stops, and the silo 5 is jogged until it reaches the set value or more. It is set as the structure which manufactures the cement milk which operates.

[0021] FIG. 6 shows an example of the cement charging state. When a predetermined time estimated from the conveying capacity of the conveying device 9 that will reach a predetermined value in the mixer 3 by normally operating the conveying device 9 elapses, the conveying device 9 is stopped. After the conveying device 9 stops, the on-off valve 13 is closed. The cement weight in the mixer 3 becomes a measured value of 158 kg with respect to a predetermined value of 130 kg, and the difference of +28 kg becomes the "error" due to the conventional overrun. Next, at the measured value of 158 kg, since the cement set value of 160 kg has not been reached, the operation shifts to jogging (if the measured value exceeds the cement set value of 160 kg and reaches 161 kg within the error tolerance range, the supply is terminated). When a predetermined time elapses after the shift to jogging operation, the measurement is performed again, and the measured value becomes 163 kg. Since it exceeds the cement set value of 160 kg, the cement charging is terminated. Therefore, as described above, if the weight is measured during normal operation and the conveying device 9 is stopped at the reached value, an error of +28 kg occurs. However, in the present invention, since cement is supplied by jogging operation, it can be supplied with an error within +3 kg, and the cement supply accuracy can be significantly improved.

[0022] In the present invention, water supplied from a water storage tank 8 set to a desired amount to become a desired amount of cement milk and cement supplied from a silo 5 are supplied to a mixer 3 and kneaded to obtain cement milk. The conveying device 9 of the silo 5 is driven for a predetermined time by normal operation to supply cement to the mixer 3, and then the conveying device 9 is stopped once. The amount of cement in the mixer 3 is measured to calculate the actual cement supply amount per unit time of the conveying device 9. Cement is supplied for a predetermined time by normal operation or jogging operation of the conveying device 9 with minute supply to measure the amount of cement in the mixer 3. Finally, cement is always supplied by jogging operation of the conveying device 9 so that the total amount becomes equal to or more than the total amount set value to produce cement milk. Therefore, since the conveying device 9 of the silo 5 is driven for a predetermined time by normal operation to supply cement to the mixer 3, and then the conveying device 9 is stopped once, and the amount of cement in the mixer 3 is measured to calculate the actual cement supply amount per unit time of the conveying device 9, it is possible to improve the cement supply accuracy corresponding to the conveying device 9 of each batch plant. Cement is supplied for a predetermined time by normal operation or jogging operation of the conveying device 9 with minute supply to measure the amount of cement in the mixer 3. Finally, cement is always supplied by jogging operation of the conveying device 9 so that the total amount becomes equal to or more than the total amount set value. Thus, the cement supply accuracy can be further improved, and accurate and uniform cement milk can be produced.

[0023] The driving of the conveying device 9 is such that, with respect to the total amount set value which is the total amount of cement for a desired amount of cement milk, it is supplied by normal operation of the conveying device 9 for a predetermined time so as to become an arbitrary predetermined value less than the total amount set value, the supply amount is measured, and the actual cement supply amount of the conveying device 9 is calculated. When the arbitrary predetermined value is close to the total amount set value, jogging operation is selected. When the arbitrary predetermined value is far from the total amount set value, normal operation is selected once. Finally, cement is always supplied by jogging operation of the conveying device 9 so that the total amount becomes equal to or more than the total amount set value. Therefore, it is possible to improve the cement supply accuracy without reducing the working efficiency. In addition, the conveying device 9 is configured to operate at the same rotational speed during both normal operation and jogging operation, and change the supply amount by changing the driving time, so that the control can be simplified and the cement supply accuracy can be improved.

[0024] Also, when driving the conveying device 9 for a predetermined time, an arbitrary predetermined value less than the total amount setting value with respect to the total amount setting value is set in one or more steps, and the cement is charged step by step for each step. At least until the second-stage predetermined value, the conveying device 9 of the silo 5 supplies cement by normal operation, and after the second correction value of the second stage, the shortage is made up by jogging the conveying device 9 of the silo 5 to supply a small amount of cement. The predetermined value is a value at which the operation of the silo 5 is stopped in advance at a value lower than the total amount setting value so as not to exceed the total amount setting value by overrun after the stop of the conveying device 9 of the silo 5, and the silo 5 is repeatedly jogged until the total amount setting value or more is reached. Therefore, when charging cement step by step for each of the arbitrarily set one or more stages of predetermined values with respect to the total amount setting value, at least until the second-stage predetermined value, the conveying device 9 of the silo 5 supplies cement by normal operation, and after the second correction value of the second stage, the shortage is made up by jogging the conveying device 9 of the silo 5. In this way, it is possible to ensure both work efficiency and improve cement supply accuracy, and produce accurate and uniform cement milk.

[0025] Also, among the two types of correction values (predetermined values), the first correction value is set to a value lower than the set value, and the second correction value is set to a value that compensates for the shortage of the previous input. And the difference between the "set value" and the "second correction value" is set to be smaller than the difference between the "set value" and the "first correction value". When the input using the second correction value is completed and the value is still lower than the set value, the jogging operation is repeated, and the small supply by the conveying device 9 of the silo 5 is repeated until the set value or more is reached. In addition, in this embodiment, the measured average cement conveyance amount of the cement actually supplied and conveyed to the mixer 3 by the conveyance device 9 is compared with the set conveyance cement amount, which is the amount of cement to be supplied and conveyed to the mixer 3 in the preset capacity of the conveyance device 9. Based on this comparison result, a correction conveyance ratio is calculated from the set conveyance cement amount ÷ the measured average cement conveyance amount. An automatic correction value is calculated based on the correction value set from the predicted weight of the cement conveyance amount after the conveyance device 9 stops and the correction conveyance ratio. An arithmetic cement conveyance amount reflecting the automatic correction value in the set conveyance cement amount is calculated. Based on the conveyance amount of the cement actually measured by the weighing device 25 and the arithmetic cement conveyance amount, the timing for stopping the cement supply from the cement silo 5 to the mixer 3 is controlled.

[0026] The conveyance device 9 of the silo 5 that supplies cement is configured to stop the supply once it supplies up to a predetermined value (correction value) with respect to the total supply amount, and then to perform jogging operation of the conveyance device 9 of the silo 5 for minute supply. When performing the jogging operation of the conveyance device 9 of the silo 5, a stop time of a predetermined time is always interposed until the conveyance device 9 restarts. Therefore, while having a configuration in which the conveyance device 9 is operated in jogging, by interposing a stop time, the conveyance device 9 (cement conveyance drive motor 16) is cooled to prevent damage. An opening / closing valve 13 is provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3. When the silo 5 is stopped, the opening / closing valve 13 is once closed, and when the silo 5 is restarted, the opening / closing valve 13 is opened. Therefore, during minute supply, since the supply flow path 10 is blocked by the opening / closing valve 13, the supply of cement from the silo 5 to the mixer 3 is immediately stopped. As a result, there is no phenomenon of cement inflow due to inertia when the supply of the silo 5 stops, and the accuracy of cement supply to the mixer 3 can be further improved.

[0027] Further, in the present invention, in a method for producing cement milk in which water supplied from a water storage tank 8 set to an amount to become a desired amount of cement milk and cement supplied from a silo 5 are supplied to a mixer 3 and kneaded to obtain cement milk, when the total amount of cement to be supplied to the mixer 3 is set as a set value, a predetermined value (correction value, previous stage stop value) having a numerical value lower than the set value is set, a conveying device 9 that will reach the predetermined value when the silo 5 is driven is normally operated, and when the amount of cement in the mixer 3 after normal operation is the same as or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the jogging operation of the conveying device 9 that drives the silo 5 to supply a very small amount is started. When the amount of cement in the mixer 3 after the jogging operation is the same as or exceeds the set value, the cement supply is terminated. When the measured value L does not match the set value, the jogging operation of the silo 5 is repeated until the amount of cement in the mixer 3 is the same as or exceeds the set value, and the cement is supplied. FIG. 7 shows another example of the cement input state. When the conveying device 9 is normally operated and the weight in the mixer 3 reaches the correction value (predetermined value) of the first stage, the conveying device 9 is stopped. After the conveying device 9 stops, the on-off valve 13 is closed. The cement weight in the mixer 3 is 129 kg with respect to 100 kg of the first correction value (first predetermined value), and the difference of +29 kg is the "error" due to the conventional overrun.

[0028] Next, after a predetermined time has elapsed, when the conveying device 9 is normally operated again and the weight in the mixer 3 reaches the correction value of the second stage, the conveying device 9 is stopped. After the conveying device 9 stops, the on-off valve 13 is closed. The cement weight in the mixer 3 is 158 kg with respect to the second correction value of 155 kg, reducing the difference (+3 kg) between the second correction value and the measured value and improving the supply accuracy. Next, at the measured value of 158 kg, since the cement set value of 160 kg has not been reached, the operation shifts to jogging (if the measured value exceeds the cement set value of 160 kg and reaches 161 kg within the error tolerance range, the supply is terminated). The measured value after the jogging operation is 163 kg, which exceeds the cement set value of 160 kg, so the cement input is terminated. Therefore, as described above, if the weight is measured during normal operation and the conveying device 9 is stopped at the target value, an error of +30 kg will occur. However, in the present invention, since cement is supplied by jogging operation, it can be supplied with an error within +5 kg, and the cement supply accuracy can be significantly improved.

[0029] For the jogging operation of the silo 5, after the jogging operation of the silo 5 stops, the amount of cement (powder including bentonite) in the mixer 3 must be measured. In this way, during the jogging operation, since the cement is always measured after the drive stops, the conveying device 9 (cement conveying drive motor 16) of the silo 5 can be stopped during this measurement time, and the cement conveying drive motor 16 can be cooled during this period. Without damaging each part of the silo 5 (especially burning), the jogging operation of the silo 5 that supplies a very small amount of cement can be realized, and the cement supply accuracy can be improved. For the predetermined value, set two correction values lower than the set value. Cement is supplied by the normal operation of the silo 5 until the second correction value of the second stage, and the conveying device 9 of the silo 5 is jogged to supply cement after the second correction value of the second stage. Therefore, for the very small resupply, since the silo 5 is stopped in a shorter time than the normal cement supply, the very small supply can be surely performed compared to the normal supply.

[0030] An opening and closing valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3. When the conveying device 9 of the silo 5 is stopped, the opening and closing valve 13 is closed, and when the conveying device 9 of the silo 5 is restarted, the opening and closing valve 13 is opened. Therefore, during the very small supply, since the supply passage 10 is blocked by the opening and closing valve 13, the supply of cement from the silo 5 to the mixer 3 is immediately stopped. As a result, there is no phenomenon of cement inflow due to inertia when the supply of the conveying device 9 of the silo 5 stops, and the cement supply accuracy to the mixer 3 can be further improved. Also, water set to a preset amount and an amount that should be cement milk is supplied to the mixer 3, the amount of water actually supplied to the mixer 3 is measured by the weighing instrument 25 to obtain a water measurement value, the water set value and the water measurement value are compared, and when the water set value and the water measurement value do not match, the amount of cement is calculated as a ratio of a predetermined ratio to the water set value, and this automatically corrected amount of cement is supplied to the mixer 3.

[0031] Also, an opening and closing valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3. The supply passage 10 on the upstream side of the opening and closing valve 13 is configured to be able to store a predetermined amount of cement. When the amount of cement in the mixer 3 is equal to or exceeds the set value after the cement supply by jogging operation is completed, the cement supply is terminated. When the measured value does not match the set value, before jogging the silo 5, the closed opening and closing valve 13 is opened to supply the cement in the supply passage 10 to the mixer 3. When the amount of cement in the mixer 3 is equal to or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the silo 5 is jogged to supply cement to the mixer 3. After the cement supply, when the amount of cement in the mixer 3 is equal to or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, again, before jogging the silo 5, the closed opening and closing valve 13 is opened to supply the cement in the supply passage 10 to the mixer 3, and the opening of the opening and closing valve 13 and the jogging operation of the silo 5 are alternately repeated until the amount of cement in the mixer 3 is equal to or exceeds the set value.

[0032] Therefore, a smaller amount of cement can be additionally supplied to the mixer 3 than by the jogging operation of the silo 5, and the cement supply accuracy can be further improved. In the frame body 2, a mixer 3 for producing cement milk by stirring water and cement (powder including bentonite) is provided, and an agitator 4 for temporarily storing the cement milk produced by the mixer 3 while stirring it to prevent it from solidifying. A silo 5 for storing cement to be supplied to the mixer 3 is provided above the batcher plant 1, and a silo 5 for storing cement to be supplied to the silo 5 and a water storage tank 8 for storing water to be added to the cement are arranged near the batcher plant 1. A conveying device 9 for discharging the cement in the silo 5 is provided in the silo 5, and an opening / closing valve 13 is provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3. In this case, the supply flow path 10 on the upstream side of the opening / closing valve 13 provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3 is configured to be able to store a predetermined amount of cement.

[0033] Therefore, the supply flow path 10 on the upstream side of the opening / closing valve 13 is configured to be able to store a predetermined amount of cement. When the amount of cement in the mixer 3 is equal to or exceeds the set value after the completion of the cement supply by jogging operation, the cement supply is terminated. When the measured value does not match the set value, before jogging the silo 5, the closed opening / closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3. When the amount of cement in the mixer 3 is equal to or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the silo 5 is jogged to supply cement to the mixer 3. After the cement supply, when the amount of cement in the mixer 3 is equal to or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, again, before jogging the silo 5, the closed opening / closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3. Until the amount of cement in the mixer 3 is equal to or exceeds the set value, the opening of the opening / closing valve 13 and the jogging operation of the conveying device 9 of the silo 5 are alternately repeated.

[0034] As a result, after the supply (input) of cement by jogging operation is completed, if the measured value does not match the set value, before the next jogging operation of the silo 5, the closed on-off valve 13 can be opened to supply the cement in the supply passage 10 to the mixer 3. Therefore, a smaller amount of cement than the jogging operation of the silo 5 can be supplied to the mixer 3, and the cement supply accuracy can be further improved. That is, as described above, the supply error due to jogging operation, which was in units of 5 kg, is further reduced to an error in units of 100 grams of 1 kg or less, and the cement supply accuracy can be significantly improved.

[0035] Therefore, the on-off valve 13 has a stop function for stopping the discharge of cement from the conveyor 9 of the silo 5 and a stock function for storing cement in the supply passage 10 on the upstream side of the on-off valve 13. However, when the cement milk manufacturing operation is completed, the on-off valve 13 is opened so as not to leave cement in the supply passage 10. After the work is completed, the remaining cement is dropped into the mixer 3 to make thin cement milk, or is discharged as waste water for disposal in accordance with the cleaning of the mixer 3. 45 is a control unit (operation panel), which connects the cement conveying drive motor 16, the water supply pump 18, etc. and controls their operations. The configuration of the control unit (operation panel) 45 is arbitrary. Hereinafter, a schematic description will be given. FIG. 10 is a front view of the operation panel (control unit) 45, and FIG. 11 is a partially enlarged view of the operation panel (control unit) 45. In FIG. 10, 46 is a display operation unit (touch panel), which displays the operating state of the plant during normal times, and inputs each setting by switching the screen.

[0036] 47 is an operation switch that switches the operation method between automatic cleaning of the mixer 3, automatic operation, and manual operation. When automatic operation is selected, water, bentonite, and cement are automatically metered, kneaded in the mixer 3 for the set kneading time, and then discharged to the agitator 4. When automatic cleaning is selected, after the cement milk production operation is completed, the inside of the mixer 3 is automatically and continuously washed with water. When manual operation is selected, the motors are operated and stopped and the valves are opened and closed manually. Figure 12 shows an example of the display on the display operation unit (touch panel) 48. In Figure 12A, a setting input screen is displayed, and the input amounts of water and cement are set on this screen. Figure 12B shows the display during operation. 68 is an automatic correction control display that indicates that the automatic correction control is being executed. Note that the numbers in Figures 10 and 12 are shown for ease of understanding and indicate arbitrary quantities, etc., and do not represent the actually input values.

[0037] (Operation of the Embodiment) The present invention has the above-described configuration, and the batcher plant 1 is transported and installed at the work site for pile driving or ground improvement, or near the work site. A water storage tank 8 is installed near the batcher plant 1, and the internal water supply pipe 20 of the frame body 2 is connected to the water supply hose 19 of the water storage tank 8. When water and cement are put into the mixer 3 of the batcher plant 1 and kneaded, cement milk is obtained. To obtain a desired amount of cement milk, water and cement may be put in at a predetermined ratio. However, it is difficult to put in a set amount of powders such as cement and bentonite. Conventionally, there has been a function to additionally input so as to exceed the set value. However, for this additional input, since the supply into the mixer 3 stops after the supply amount exceeds the set value, much more cement than the set value is put in due to the overrun of the conveying device 9 of the silo 5 after the stop.

[0038] Therefore, the additional input function has a drawback that the upper limit value of the allowable range from the set value is provided, and when the range of the set value is narrow, the allowable range is exceeded. Therefore, in the batch plant 1 configured as described above, the total amount of cement to be supplied to the mixer 3 is set to a predetermined value lower than the set value with respect to the set value, the silo 5 is normally operated until the predetermined value is reached to supply cement, and after the supply of the predetermined value, the silo 5 is jogged to supply a small amount of cement to the mixer 3. A specific example will be described below with reference to FIG. 5. First, the operation of the batch plant 1 is started by operating the automatic operation start button 48 of the control unit (operation panel) 45 (S1). The control unit (operation panel) 45 energizes the water supply pump 18 of the water storage tank 8 to supply water set for each batch (one process) (hereinafter referred to as the water set value) to the mixer 3, shuts off the power supply to the water supply pump 18 when the water set value is reached, and closes the on-off valve 21 (S2).

[0039] After supplying water of the water set value into the mixer 3, the weighing device 25 measures the weight of the mixer 3, calculates and corrects the supply amount of bentonite according to the measured amount of water, supplies bentonite so as to become this automatic correction bentonite set value, and stops the supply of bentonite when the set value is reached (S3). When the supply of bentonite is stopped, the stirring motor 27 of the mixer 3 is energized to rotate the stirring blade 26 and knead for a predetermined time. When kneaded for a predetermined time, the stirring blade 26 of the mixer 3 is automatically stopped. Next, the amount of cement having a ratio of a predetermined ratio is calculated based on the amount of water actually supplied to the mixer 3, and the conveyor 9 of the silo 5 is energized so as to obtain the amount of cement based on the corrected automatic cement correction value, and the supply of cement to the mixer 3 is started (S4).

[0040] First, the on-off valve 13 is opened (S5), and the conveyor 9 of the silo 5 is driven (S7). When cement is supplied from the silo 5 to the mixer 3, the weighing device 25 measures the weight of the mixer 3 (S8), and when the cement is supplied up to a predetermined value, the supply of cement from the silo 5 is temporarily stopped (S9). Next, after passing through the screw time lag (S10), there is a time lag until the on-off valve 13 is closed, but the time longer than the time until the on-off valve 13 is completely closed can be set on the operation panel 45 as the time of the sleep timer, and the timing when the cement in the internal cement supply pipe 12 is completely put into the mixer-3 can be estimated. After the time set by the sleep timer has elapsed, the weight in the mixer is measured. If the cement set value is reached, the cement weighing (supply / input) is terminated (S33). In this case, it means that the amount of cement corresponding to the cement set value has been supplied in one cement supply operation.

[0041] On the other hand, in step 13, if the weight of the mixer 3 is measured and the cement set value ≥ cement weighing value has not been reached, the process proceeds to the weighing management mode (S14), the on-off valve 13 is opened (S15), after the screw time lag has elapsed (S16), the conveying device 9 of the silo 5 is driven for the jog operation time (S17), after the jog sleep timer (S18), when the cement set value is exceeded, the conveying device 9 is stopped (S19), after the screw time lag has elapsed (S20), the on-off valve 13 is closed (S21), the cement weighing operation is terminated, after the time set by the jog sleep timer has elapsed, the jog operation of the conveying device 9 is stopped (S19), after the screw timer lag (S20), the on-off valve 13 is closed (S21), after the sleep timer (S22), in step 23, if the weight of the mixer 3 is measured and the cement set value is reached or exceeded, the cement weighing (supply / input) is terminated (S24), if the cement set value is not reached in step 23, the process returns to step 14, the jog operation of the conveying device 9 is restarted, and the jog operation is repeated until the cement set value is exceeded in step 23. When the cement set value is exceeded, the conveying device 9 is stopped (S19), after the screw time lag has elapsed (S20), the on-off valve 13 is closed (S21), and the cement weighing operation is terminated.

[0042] Thereby, excessive supply of cement can be reduced, and cost reduction becomes possible. Figure 7 (old Figure 5) shows another embodiment. The operation of the batch plant 1 is started by operating the automatic operation start button 48 of the control unit (operation panel) 45 (S1). The control unit (operation panel) 45 energizes the water supply pump 18 of the water storage tank 8 to supply the set amount of water (hereinafter referred to as the water set value) per batch (one process) to the mixer 3. When the water set value is reached, the power supply to the water supply pump 18 is cut off and the on-off valve 21 is closed (S2). After supplying the water of the water set value into the mixer 3, the weighing instrument 25 measures the weight of the mixer 3, calculates and corrects the supply amount of bentonite according to the measured water amount, supplies bentonite so as to obtain this automatic correction bentonite set value, and stops the supply of bentonite when the set value is reached (S3).

[0043] When the supply of bentonite is stopped, the stirring motor 27 of the mixer 3 is energized to rotate the stirring blade 26 and knead for a predetermined time. When kneaded for a predetermined time, the stirring blade 26 of the mixer 3 is automatically stopped. Next, based on the actual water amount supplied to the mixer 3, the amount of cement is calculated at a ratio of a predetermined ratio, and the conveyor 9 of the silo 5 is energized so that the amount of cement is based on the corrected automatic cement correction value, and the supply of cement to the mixer 3 is started (S4). First, the on-off valve 13 is opened (S5), and the conveyor 9 of the silo 5 is driven (S7). When cement is supplied from the silo 5 to the mixer 3, the weighing instrument 25 measures the weight of the mixer 3 (S8). When the cement is supplied up to a predetermined value, the cement supply from the silo 5 is temporarily stopped (S9).

[0044] Next, after a screw time lag (S10), a time lag occurs until the on-off valve 13 is closed, but the time longer than the time until the on-off valve 13 is completely closed can be set on the operation panel 45 as the time of the sleep timer, and the timing when the cement in the internal cement supply pipe 12 is completely put into the mixer 3 can be estimated. After the time set by the sleep timer has elapsed, measure the weight inside the mixer. If the cement set value is reached, end the cement metering (supply / input) (S33). In this case, it means that the amount of cement corresponding to the cement set value has been supplied in one cement supply operation. On the other hand, in step 13, if the cement set value has not been reached, start additional input in the metering management mode (S13). In the metering management mode (S14), open the on-off valve 13 (S15) and drive the conveyor 9 of the silo 5 (S17).

[0045] When cement is supplied from the silo 5 to the mixer 3, the weight measuring device 25 measures the weight of the mixer 3 (S18). When the cement is supplied up to a predetermined value, temporarily stop the cement supply from the silo 5 (S19). Next, after passing through the screw time lag (S20), close the on-off valve 13 (S21). After passing through the sleep timer (S22), measure the weight inside the mixer 3. When the cement set value is reached or exceeded (S23), end the cement metering (supply / input) (S33). Furthermore, if the cement set value is not reached in step 23, start the jogging operation of the conveyor 9 (S26). If the cement set value is not reached in step 32, repeat the jogging operation until the cement set value is exceeded. This can reduce the excessive usage amount of cement and enable cost reduction.

[0046] Also, it becomes possible to meet the strict cement usage standards at the construction site, and it becomes possible to introduce the machine to a site with stricter standards. Furthermore, the cement mixture contained in the cement milk for minimizing the metering error becomes uniform, and a better quality cement milk can be supplied. In this way, the mixer 3 is supplied with the correct ratio of water and cement. In this state, energize the stirring motor 27 of the mixer 3 to rotate the stirring blade 26 and knead for a predetermined time. When kneaded in the mixer 3 for a predetermined time, the power supply to the agitation motor 27 is cut off to stop the agitation blade 26. Then, the cement milk is discharged from the discharge port 28 of the mixer 3 and supplied to the agitator 4. In the agitator 4, the rotary blade 31 is rotated by the drive motor 32 to prevent the cement milk from solidifying, and it is supplied from the agitator 4 to the pile driver or the ground improvement device via the transfer pump 41.

[0047] In another embodiment of FIG. 9, when the weight of the mixer 3 is measured in the metering management mode (S13) and the cement set value ≥ the cement measured value, it shifts to the jogging operation (S14). However, before jogging the transfer device 9, the on-off valve 13 is opened (S15), and the residual cement in the supply flow path 10 on the upper side of the on-off valve 13 is supplied to the mixer 3. After the screw time lag has elapsed (S16), the weight inside the mixer 3 is measured. If the cement set value has been reached, the cement metering operation ends (S26), and it shifts to the kneading process (S27). Also, in step 17, if the cement set value has not been reached, the jogging operation of the transfer device 9 of the silo 5 is started (S19). When a small amount of cement is supplied from the silo 5 to the mixer 3, the weighing instrument 25 measures the weight of the mixer 3 (S25). If the cement set value has been reached, the cement metering operation ends (S26), and it shifts to the kneading process.

[0048] Furthermore, in step 25, when measuring the weight of the mixer 3 after the small amount of supply and the cement set value has not been reached, it returns to step 15, and the opening of the on-off valve 13 and the jogging operation of the transfer device 9 are repeatedly executed until the cement set value is reached. Note that in order to obtain a desired amount of cement milk, water and cement may be input in a predetermined ratio. However, the supply of a set amount of water is unexpectedly difficult. The water supply pump 18 discharges water in such a way that so-called pulsation occurs in the supply hose, and the amount of water discharged is not constant, and there may be variations in the supply amount. In this case, as shown in Fig. 9, the control unit (operation panel) 45 energizes the water supply pump 18 of the water storage tank 6 to supply the water set for each batch (one process) (hereinafter referred to as the water set value L) to the mixer 3. When the water reaches the water set value L, the power supply to the water supply pump 18 is cut off, the on-off valve 21 is closed, the weight of the mixer 3 is measured by the weighing device 25 (S2), and the actual amount of water supplied to the mixer 3 (hereinafter referred to as the water measured value M) is detected.

[0049] In this case, since the actual amount of water (water measured value M) supplied to the mixer 3 does not match the water set value L, the water set value L and the water measured value M do not match. However, the ratio (W / C) of the amount of cement to the water measured value M is calculated so that the amount of this inconsistent water becomes the amount of cement for a predetermined amount of water (hereinafter referred to as the cement set value N) in advance (in step S5, "W / C" is the ratio of water to cement). Next, the automatic correction cement set value P is calculated as water measured value M ÷ W / C (S6). When the automatic correction cement set value P is calculated, the ratio (B / C) of the amount of bentonite (additive) to be supplied to a predetermined amount of cement set in advance is calculated (S8). Next, the automatic correction bentonite set value R is calculated as automatic correction cement set value P ÷ ratio (B / C) (S9). Therefore, since the automatic correction bentonite set value R is the amount of bentonite calculated based on the amount of cement actually to be supplied to the mixer 3, the automatic correction bentonite set value R is reflected in the control of the control unit (operation panel) 45 (S10).

[0050] Then, the control by the control unit (operation panel) 45 determines whether it is the bentonite set value B (S11), and based on the automatic correction bentonite set value R, supplies bentonite to the mixer 3. When the bentonite is supplied to the mixer 3, the weighing device 25 measures the weight of the mixer 3, and when the bentonite is supplied so as to reach the automatic correction bentonite set value R, the supply of bentonite is stopped (S12). Here, it is assumed that the mixer 3 has been supplied with the correct ratio of water and bentonite. When the supply of bentonite is stopped, the stirring motor 27 of the mixer 3 is energized to rotate the stirring blade 26, and kneading is performed for a predetermined time (S13). When kneading is performed for a predetermined time, the stirring blade 26 of the mixer 3 is automatically stopped. Next, the conveying device 9 of the silo 5 is driven so that the amount of cement becomes the cement amount based on the automatic correction cement setting value P, and cement is supplied to the mixer 3 based on the respective flows of FIGS. 5, 7, and 8 of the present invention (S14).

Explanation of Reference Numerals

[0051] 1... Batch plant, 2... Frame body, 3... Mixer, 4... Agitator, 5... Silo, 6... External supply silo, 7... Supply conveying hose, 8... Water storage tank, 9... Conveying device, 10... Supply flow path, 11... Discharge hose, 12... Cement supply pipe, 13... On-off valve, 14... Cement capacity detector, 18... Water supply pump, 19... Water supply hose, 20... Internal water supply pipe, 21... On-off valve, 22... Water supply motor, 24... Kneading trough, 25... Weighing instrument, 26... Stirring blade, 27... Stirring motor, 28... Discharge port, 29... On-off valve, 30... Retention trough, 31... Rotating blade, 32... Driving motor, 40... Conveying hose, 41... Conveying pump, 45... Control unit (operation panel), 46... Display operation unit (touch panel), 47... Operation changeover switch, 55... Emergency stop button, 56... Control power lamp, 57... Emergency stop lamp, 58... Operation time display unit, 59... Recording printer, 60... Insertion port, 61... Data input unit, 63... Storage unit, 65... Middle door, 66... Window.

Claims

1. In a method for manufacturing cement milk, wherein water supplied from a water storage tank 8 set to a desired amount to become cement milk and cement in a preset amount from a silo 5 are supplied to a mixer 3 and kneaded to obtain cement milk, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3, and after a predetermined time has elapsed, the conveying device 9 is temporarily stopped. The amount of cement in the mixer 3 is measured to calculate the actual cement supply amount per unit time of the conveying device 9, and the remaining cement with respect to the set amount is supplied by selecting either the normal operation or the jog operation capable of fine supply of the conveying device 9 so that it becomes equal to or more than the set value. A method for manufacturing cement milk in a batch plant for manufacturing cement milk.

2. In Claim 1, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3, and the conveying device 9 is temporarily stopped before a predetermined time elapses when it will reach an arbitrary predetermined amount less than the preset set amount. The remaining cement with respect to the set amount is supplied by jogging the conveying device 9 for fine supply so that it becomes equal to or more than the set value. A method for manufacturing cement milk in a batch plant for manufacturing cement milk.

3. In Claim 1, the conveying device 9 of the silo 5 is driven by normal operation to supply cement to the mixer 3, and after a predetermined time has elapsed, the conveying device 9 is temporarily stopped. The amount of cement in the mixer 3 is measured to calculate the actual cement supply amount per unit time of the conveying device 9. When the measured value of cement after the predetermined time has elapsed is far from the set value, normal operation is selected again. When the measured value of cement after the predetermined time has elapsed is close to the total amount set value, jog operation is selected, and cement is supplied by jog operation so that it becomes equal to or more than the set value. A method for manufacturing cement milk in a batch plant for manufacturing cement milk.

4. In any one of Claims 1 to 3, the conveying device 9 of the silo 5 is driven by normal operation to supply a predetermined amount of cement to the mixer 3. After the supply, the amount of cement in the mixer 3 is measured. When selecting either the normal operation or the jog operation capable of fine supply of the conveying device 9 to supply so that it becomes equal to or more than the set value, finally, cement is always supplied by jogging the conveying device 9 so that it becomes equal to or more than the total amount set value. A method for manufacturing cement milk in a batch plant for manufacturing cement milk.

5. In a method for manufacturing cement milk, water supplied from a water storage tank 8 set to a desired amount of cement milk and cement supplied from a silo 5 by a conveying device 9 are supplied to a mixer 3 and kneaded to obtain cement milk. The driving of the conveying device 9 is such that, with respect to a total amount set value that is the total amount of cement for a desired cement milk amount, the supply amount is measured by supplying it for a predetermined time of normal operation of the conveying device 9 so as to be an arbitrary predetermined value less than the total amount set value, and the actual cement supply amount of the conveying device 9 is calculated. A correction value at the time of cement input is set in two steps to a value lower than the set value with respect to the total amount set value of the cement to be supplied to the mixer 3, and the cement is input step by step for each of the two-step correction values. Cement is supplied by the normal operation of the conveying device 9 of the normal silo 5 up to the second correction value of the second step, and a jogging operation function is provided to jog the conveying device 9 of the silo 5 to supply a minute amount of cement to the mixer 3 after the second correction value of the second step, and the shortage is input in minute units by the jogging operation. The correction value is a numerical value for stopping the operation of the silo 5 in advance at a value lower than the set value so as not to exceed the set value by overrunning after the silo 5 stops, and the silo 5 is repeatedly jogged until it becomes equal to or higher than the set value. A method for manufacturing cement milk in a batch plant for manufacturing cement milk.

6. In a method for manufacturing cement milk, water supplied from a water storage tank 8 set to a desired amount of cement milk and cement supplied from a silo 5 are supplied to a mixer 3 and kneaded to obtain cement milk. The configuration is such that the supply amount is measured by normal operation of a conveying device 9 for a predetermined time to calculate the actual cement supply amount of the conveying device 9. The total amount of cement to be supplied to the mixer 3 is set with a correction value at the time of cement input lower than the set value in two stages with respect to the set value, and the cement is input step by step for each of the two-stage correction values. Up to the second correction value in the second stage, cement is supplied by normal operation of the silo 5. After the second correction value in the second stage, a jogging operation function is provided to jog the silo 5 to supply a minute amount of cement to the mixer 3, and the shortage is input in minute units by the jogging operation. The correction value is a value for stopping the operation of the silo 5 in advance with a value lower than the set value so as not to exceed the set value by overrun after the silo 5 stops, and the jogging operation of the silo 5 is repeated until the set value is reached or exceeded. A method for manufacturing cement milk in a batch plant.

7. In claim 6, among the two-stage correction values, the first correction value is a value lower than the set value, the second correction value is a value for compensating for the shortage of the previous input, and the difference B between the set value and the second correction value is set to be smaller than the difference A between the set value and the first correction value. When the input using the second correction value ends and the value is still lower than the set value, the jogging operation is repeated, and the jogging operation of the silo 5 is repeated until the set value is reached or exceeded. A method for manufacturing cement milk in a batch plant.

8. Water set to a predetermined amount of cement milk to be supplied to the mixer 3 of the batch plant 1 is supplied to the mixer 3, and the cement amount with a ratio of a predetermined ratio is calculated based on the amount of water supplied to the mixer 3, and the corrected cement amount is supplied to the mixer 3. The conveying device 9 of the silo 5 that supplies cement, when supplying up to a predetermined value with respect to the total supply amount, once stops the supply, measures the supply amount, calculates the actual cement supply amount of the conveying device 9, and then jogs the conveying device 9 of the silo 5 for minute supply. When jogging the conveying device 9 of the silo 5, a configuration is adopted in which a stop time of a predetermined time is always interposed until the conveying device 9 is restarted. A method for manufacturing cement milk in a batch plant.

9. In the batch plant cement milk manufacturing method according to any one of claims 5 to 8, an on-off valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3, and when the silo 5 is stopped, the on-off valve 13 is closed, and when the silo 5 is restarted, the on-off valve 13 is opened.

10. In a cement milk manufacturing method of supplying water supplied from a water storage tank 8 set to an amount to become a desired amount of cement milk and cement supplied from the silo 5 to the mixer 3, kneading them to obtain cement milk, when the total amount of cement to be supplied to the mixer 3 is set as a set value, a predetermined value of a numerical value lower than the set value is set, the silo 5 is driven and normally operated for a time that will become the predetermined value, then once stopped, the supply amount is measured, the cement supply amount of the actual conveying device 9 is calculated, when the amount of cement in the mixer 3 after normal operation is the same as or exceeds the set value, the cement supply is terminated, when the measured value does not match the set value, the jogging operation of the conveying device 9 for driving the silo 5 to supply a minute amount is started, when the amount of cement in the mixer 3 after the jogging operation is the same as or exceeds the set value, the cement supply is terminated, when the measured value does not match the set value, until the amount of cement in the mixer 3 is the same as or exceeds the set value, the jogging operation of the silo 5 is repeated to supply cement.

11. In claim 10, in the cement milk manufacturing method of the batch plant, the jogging operation of the silo 5 always measures the amount of cement in the mixer 3 after the jogging operation of the silo 5 stops.

12. In claim 10, the predetermined value is set to two correction values lower than the set value, cement is supplied by the normal operation of the silo 5 until the second correction value of the second stage, and after the second correction value of the second stage, the silo 5 is jogged to supply cement.

13. In claim 10, in the cement milk manufacturing method of the batch plant, an on-off valve 13 is provided in the supply passage 10 for supplying cement from the silo 5 to the mixer 3, and when the silo 5 is stopped, the on-off valve 13 is closed, and when the silo 5 is restarted, the on-off valve 13 is opened.

14. In any one of claims 10 to 13, water set to a preset amount and an amount to be cement milk is supplied to the mixer 3, the amount of water actually supplied to the mixer 3 is measured by the weighing device 25 to obtain a water measurement value, the water set value and the water measurement value are compared, and when the water set value and the water measurement value do not match, the amount of cement to be added to the water of the water measurement value is calculated so as to be a ratio of the amount of cement to a predetermined amount of water calculated in advance, and the automatically corrected amount of cement is supplied to the mixer 3. A method for manufacturing cement milk in a batch plant.

15. In any one of claims 10 to 13, an opening / closing valve 13 is provided in the supply flow path 10 for supplying cement from the silo 5 to the mixer 3, and the supply flow path 10 on the upstream side of the opening / closing valve 13 is configured to be able to store a predetermined amount of cement. When the amount of cement in the mixer 3 is the same as or exceeds the set value after the cement supply by jogging operation is completed, the cement supply is terminated. When the measured value does not match the set value, before jogging the silo 5, the closed opening / closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3. When the amount of cement in the mixer 3 is the same as or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, the silo 5 is jogged to supply cement to the mixer 3. After the cement supply, when the amount of cement in the mixer 3 is the same as or exceeds the set value, the cement supply is terminated. When the measured value does not match the set value, again, before jogging the silo 5, the closed opening / closing valve 13 is opened to supply the cement in the supply flow path 10 to the mixer 3, and the opening of the opening / closing valve 13 and the jogging operation of the silo 5 are alternately repeated until the amount of cement in the mixer 3 is the same as or exceeds the set value. A method for manufacturing cement milk in a batch plant.

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