JP7173489B2 - Batcher plant cement milk production method and batcher plant - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for producing cement milk in a batcher plant and a portable batcher plant.

Conventionally, a configuration is known in which a mixer for producing cement milk by adding water to and stirring cement from a cement storage silo and a weight measuring instrument for measuring the weight of the mixer are provided (Patent Document 1). ).

JP-A-8-281632

In the above known example, the weight of the cement milk is measured by a weighing instrument in order to obtain the desired amount of cement milk, but the weight of the cement milk after being mixed and added is simply measured. However, there is a problem that the mixing ratio of water and cement cannot be accurately grasped, and the quality of cement milk varies.
The present invention devises the manufacturing process of cement milk so as to supply cement milk of stable quality.

In the invention of claim 1, the amount of cement milk is set to a preset amount in the mixer 3 of the batcher plant 1 installed at the work site of pile driving or ground improvement or near the work site. The amount of water actually supplied to the mixer 3 after the completion of the water supply is measured by the weight measuring instrument 25 to obtain the measured water value M, and the set water value L and the measured water value M , and when the set water value L and the measured water value M do not match, the amount of cement to be added to the water of the measured water value M is calculated so as to be the ratio of the amount of cement to the predetermined amount of water calculated in advance. Then, this automatic corrected amount of cement is supplied to the mixer 3 as a method for producing cement milk in a batcher plant.
The invention of claim 2 is a method for producing cement milk in a batcher plant, wherein the automatically corrected amount of cement is set so that the proportion of cement in the ratio of water to cement in the cement milk is always large. It is what I did.
In the third aspect of the invention, the set water value L and the measured water value M are compared, and when the set water value L and the measured water value M do not match, the amount of cement becomes a predetermined ratio to the set water value L. and supplies this automatically corrected amount of cement to the mixer 3, prints and stores the set water value L, the measured water value M and the automatically corrected amount of cement at this time, and performs cement milk production in the next process. This is a batcher plant cement milk production method.
According to the fourth aspect of the invention, the kneading gutter 24 of the mixer 3 is suspended from the frame body 2 having a predetermined shape by a plurality of weight measuring instruments 25, and the mixer 3 has an internal cement supply hose 15 connected to the silo 5. and the internal water supply pipe 20 connected to the water storage tank 6 are connected to each other, and the vertical conveying device 9 of the silo 5 and the water supply pump 18 of the water storage tank 6 are configured to be driven by the operation unit 45, and the operation unit 45 is , the amount of water actually supplied by the water storage tank 6 is measured by the weight measuring instrument 25 so that the cement amount of the cement set value N with respect to the water amount of the water set value L set in advance is measured, and the water supply set amount and the water supply measured amount are obtained. , a batcher plant configured to supply cement from a silo 5 to a mixer 3 by calculating a correction amount of cement with respect to an actual amount of supplied water.

In the invention of claim 1, when cement milk is produced, the amount of cement supplied is automatically corrected so as to achieve a predetermined percentage ratio with respect to the water set value L in light of the amount of water actually supplied to the mixer 3. It can improve the mixing ratio accuracy of water and cement, and can produce accurate and uniform cement milk.
In the invention of claim 2, the automatically corrected amount of cement is set so that the ratio of the cement content to the water in the cement milk is always large, so the proper cement content of cement milk, and the quality of cement milk can be stabilized.
In the invention of claim 3, the amount of cement that has a predetermined ratio with respect to the amount of water supplied to the mixer 3 is automatically corrected and supplied to the mixer 3, and the water set value L, the water measurement value M, and the automatically corrected cement Since the amount is printed and stored, the ratio of cement amount to water amount can be examined in detail, and the quality of cement milk can be improved.
In the fourth aspect of the invention, the operation unit 45 measures the amount of water actually supplied from the water storage tank 6 by the weight measuring device 25 so that the cement amount of the cement set value N is equal to the water amount of the preset water set value L. Then, the set amount and the measured amount are compared, and the corrected amount of cement for the actual amount of water supplied is calculated, and the cement is supplied to the mixer 3 from the silo 5. Even with the batcher plant 1 of the type that supplies water by , it is possible to produce cement milk with accurate and uniform mixing ratio accuracy and stable quality, and the installation space of the portable batcher plant 1 can be reduced, Space saving of the batcher plant can be realized, and cement milk can be produced by adjusting the timing of adding water and cement by controlling each part by the operation part 45, so the operation part of the existing batcher plant 1 can be used. 45 improvements can provide a low-cost, high-precision batcher plant.

Side view of a batcher plant. Same plan view. The schematic circuit diagram of the same. Flow diagram. The front view of a control part (operating panel). Enlarged view of the same part. The front view of the display operation part (touch panel) of the control part (operation panel).

One embodiment of the present invention will be described with reference to the drawings. 1 is a portable batcher plant, 2 is a frame body of the batcher plant 1, and in the frame frame body 2, water and cement are stirred to produce cement milk. and an agitator 4 for temporarily storing the cement milk produced by the mixer 3 while agitating it so that it does not harden.
A silo 5 for storing cement to be supplied to the mixer 3 and a water storage tank 6 for storing water to be added to the cement are provided near the batcher plant 1 .
The structure of the silo 5 is arbitrary, and the silo 5 only needs to be able to store cement. , the end of the vertical conveying device 9 is connected to a discharge chute 10 provided in the upper part of the silo 5 , and a conveying hose 11 for feeding cement to the mixer 3 is connected to the discharge chute 10 .
The end of the transport hose 11 is connected to an internal cement supply hose 15 connected to the mixer 3 provided within the frame body 2 .

Reference numeral 16 denotes a cement lifting drive motor for driving the horizontal conveying device 8 and the vertical conveying device 9 .
The structure of the water storage tank 6 is arbitrary, and the water storage tank 6 is provided with a water supply pump 18 for supplying water to the mixer 3 . In this embodiment, two water supply pumps 18 are provided to shorten the water supply time to the mixer 3, but one or two or more may be provided.
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 beginning of an internal water supply pipe 20 provided in the frame body 2, and the end of the internal water supply pipe 20 is connected to the mixer 3. . An opening/closing valve 21 that opens and closes by an actuator (not shown) is provided in the middle part of the internal water supply pipe 20, and when a predetermined amount of water is supplied to the mixer 3, the opening/closing valve 21 is closed. supply accuracy can be improved.

That is, even if the water supply pump 18 is stopped when the amount of water in the mixer 3 reaches the set value, the discharge of the water supply pump 18 is not immediately stopped, and there is a time lag between the stoppage of the water supply and the stoppage of discharge. Water flows into the mixer 3 by the amount of the time lag, and the precision of the water supply amount decreases. is closed, 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 for the water supply pump 18 .
In the mixer 3, a kneading gutter 24 is vertically movably suspended in the frame body 2, and a weight measuring instrument (load cell) 25 is attached to the kneading gutter 24. As shown in FIG. The weight measuring 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. Weigh.

A stirring blade 26 is suspended from the kneading gutter 24 and rotated by a stirring motor 27 . A discharge port 28 for discharging the mixed cement milk is provided at a predetermined location of the kneading trough 24 . 29 is an open/close valve.
A reservoir trough 30 of the agitator 4 faces below the discharge port 28 of the kneading trough 24 . A storage gutter 30 is provided with a rotary blade 31 , and a drive motor 32 for the rotary blade 31 is provided above the storage gutter 30 .
A detector 35 detects the amount of cement milk in the reservoir trough 30 of the agitator 4 .
A transport hose 40 for transporting cement milk is connected to the agitator 4 , and a transport pump (grout pump) 41 for transporting cement milk is provided at a predetermined position in the intermediate portion of the transport hose 40 .

Reference numeral 45 denotes a control unit (operating panel) to which the pumps and the like are connected and to control their operations. The configuration of the control unit (operation panel) 45 is arbitrary, and the outline thereof will be described below. FIG. 5 is a front view of the operation panel (control unit) 45, and FIG. In FIG. 5, reference numeral 46 denotes a display operation unit (touch panel), which normally displays the operating state of the plant, and inputs various settings by switching screens.
Reference numeral 47 denotes an operation selector switch for automatically washing the mixer 3 and switching between automatic operation and manual operation. When automatic operation is selected, water, bentonite, and cement are automatically weighed. After kneading in the mixer 3 for a set kneading time, the mixture is discharged to the agitator 4. If automatic cleaning is selected, the inside of the mixer 3 is automatically and continuously washed with water after the cement milk manufacturing operation is completed. When manual operation is selected, each motor is started/stopped and valves are opened/closed by manual operation.

In FIG. 6, 48 is an automatic operation start button, which starts the operation selected by the operation changeover switch 47 . Reference numeral 49 denotes an automatic operation end button. When the automatic operation end button 49 is operated, the operation is stopped after the automatic operation work is completed. An automatic operation lamp 50 is lit during automatic operation and turned off when stopped.
Reference numeral 51 denotes an ON/OFF switch for the agitator 4, which operates/stops rotation of the agitator 4 when manual operation is selected. Reference numeral 52 denotes an ON/OFF switch for the mixer 3, which operates/stops the rotation of the mixer 3 when the manual operation is selected. Reference numeral 53 denotes an ON/OFF switch for the water supply pump 18, which is operated when manual operation is selected. 54 is an ON/OFF switch for the cement lift drive motor 16 of the silo 5, and 55 is an emergency stop button.

In FIG. 5, reference numeral 65 denotes a middle door, and when the middle door 65 is opened, various lamps and the like, which will be described later, are provided. 66 is a window of the middle door 65 . 56 is a control power supply lamp, which lights up when the batcher plant 1 is powered on. An emergency stop lamp 57 is lit during an emergency stop. Numeral 58 is an operation time display unit, which displays the cumulative operating time of the batcher plant 1 and is used for judgment of maintenance timing.
Reference numeral 59 denotes a printer for recording, which prints work data such as operating time, amount of water, amount of cement, etc. for each predetermined work. Reference numeral 60 denotes an insertion port for a data input unit 61 for inputting data to a recording medium (not shown) such as a USB memory or an SD card.

In this case, the control unit (operation panel) 45 includes the operation data of the batcher plant 1, such as the operation time, amount of water, and amount of cement, as well as the operation data of the batcher plant by the display operation unit (touch panel) 46 before starting work. A storage unit 63 is provided for storing input data, etc., set for each unit of 1, and the data stored in the storage unit 63 can be selected and printed by the recording printer 59 .
Therefore, the state of the cement milk, the work data, the input data, etc. can be compared and examined, and the quality of the cement milk can be easily improved.
FIG. 7 shows a display example of the display operation unit (touch panel) 48. In FIG. 7A, a setting input screen is displayed, and the input amount of water and cement is set on this screen. 67 is an automatic correction closing switch.
FIG. 7B shows the display during operation. An automatic correction control display 68 indicates that the automatic correction control is being executed.
It should be noted that the description of numbers in FIG. 7 is a display description example for easy understanding, and does not indicate values that are actually input.

(Action of Embodiment)
The present invention has the above configuration, and the batcher plant 1 is transported and installed at a work site for pile driving or ground improvement, or in the vicinity of the work site. In addition, a silo 5 and a water storage tank 6 are installed near the batcher plant 1, an internal cement supply hose 15 inside the silo 5 of the batcher plant 1 is connected to the transfer hose 11 of the silo 5, and water is supplied to the water storage tank 6. An internal water supply pipe 20 of the frame body 2 is connected to the hose 19 .
When water and cement are put into the mixer 3 of the batcher plant 1 and kneaded, they become cement milk. It is unexpectedly difficult to supply water, and the water supply pump 18 does not discharge a constant amount of water so that so-called pulsation occurs in the supply hose. is 0.9 liters, the next minute is 1.2 liters, and when water is actually discharged for 10 minutes, the supply amount may vary from 9.5 to 10.5 liters.

Therefore, even if a control program for the control unit (operation panel) 45 is simply created based on the specification table of the water supply pump 18, cement milk in which water and cement are mixed at the desired set ratio cannot be obtained. Sometimes.
Furthermore, other factors such as the water level in the water storage tank 6 and the opening/closing error of the opening/closing valve 21 make it difficult to supply the set amount of water, and the accuracy of the water/cement ratio deteriorates.
Therefore, the batcher plant 1 having the above configuration is operated as follows to obtain cement milk having an accurate mixing ratio of water and cement in accordance with the set ratio.
First, the operation of the batcher plant 1 is started by operating the automatic operation start button 48 of the control unit (operating panel) 45 (S1).

A control unit (operating panel) 45 energizes the water supply pump 18 of the water storage tank 6 to supply water set per batch (one process) (hereinafter referred to as a water set value L) to the mixer 3. At this time, the power supply to the water supply pump 18 is cut off, the open/close valve 21 is closed, the weight of the mixer 3 is measured by the weight measuring instrument 25 (S2), and the amount of water actually supplied to the mixer 3 (hereinafter referred to as water weighing M) is detected.
In this case, since the amount of water actually supplied to the mixer 3 (measured water value M) does not match the set water value L, the set water value L and the measured water value M do not match. When the automatic correction supply switch 67 of the control unit (operation panel) 45 is on (S3), the water set value L and the water measured value M are compared (S4), and if the water set value L is large, The ratio (W/C) of the amount of cement to the measured water value M is calculated so that the amount of cement to the predetermined amount of water (hereinafter referred to as the cement set value N) is obtained (S5). In S5, "W/C" is the ratio of water and cement.

Next, the water measurement value M/W/C is calculated as the automatically corrected cement set value P (S6), and the automatically corrected cement set value P is reflected in the control (S7).
When the automatic correction cement setting value P is calculated, the ratio (B/C) of the amount of bentonite (additive) to be supplied to the predetermined amount of cement that is set in advance to become the bentonite setting value B is calculated ( S8). "B/C" in S8 is the ratio of bentonite and cement.
Next, automatic correction cement setting value P÷ratio (B/C)=automatic correction bentonite setting value R is calculated (S9).
Therefore, since the automatically corrected bentonite set value R is the amount of bentonite calculated based on the amount of cement to be actually supplied to the mixer 3, the automatically corrected bentonite set value R is reflected in the control of the control unit (operation panel) 45. (S10).

Then, the control unit (operation panel) 45 determines whether or not the bentonite set value B is set (S11), and based on the automatically corrected bentonite set value R, bentonite is supplied to the mixer 3, and the bentonite is When the bentonite is supplied to the mixer 3, the weighing instrument 25 measures the weight of the mixer 3, and when bentonite is supplied so as to reach the automatic correction bentonite set value R, the supply of bentonite is stopped (S12).
Here, the mixer 3 is supplied with water and bentonite in an accurate ratio, and 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 (S13).
After kneading for a predetermined time, the stirring blades 26 of the mixer 3 are automatically stopped.
Next, the cement is supplied to the mixer 3 by energizing the horizontal conveying device 8 and the vertical conveying device 9 of the silo 5 so that the cement amount is based on the automatically corrected cement set value P (S14).

When the cement is supplied to the mixer 3, the weight measuring instrument 25 measures the weight of the mixer 3, and when the cement of the amount of the automatic correction cement set value P is supplied, the cement supply from the silo 5 is stopped (S15 ).
Here, cement is supplied to the mixer 3 in addition to water and bentonite in the correct proportions, and the agitating motor 27 of the mixer 3 is energized again to rotate the agitating blade 26 and knead for a predetermined time. (S16).
When the mixture is kneaded by the mixer 3 for a predetermined time, the power to the stirring motor 27 is cut off and the stirring blades 26 are stopped.
At the same time, the mixer 3 discharge routine is started (S17), and the recording printer 59 executes a batch print routine for printing work data such as operating time, amount of water, and amount of cement per batch (S18).

Then, the cement milk is discharged from the discharge port 28 of the mixer 3 and supplied to the agitator 4, and the rotor 31 is rotated by the driving motor 32 in the agitator 4 to prevent the cement milk from solidifying and conveying it from the agitator 4. Via a pump 41 it is supplied to the piling or soil improvement equipment.
On the other hand, the mixer 3 determines whether or not the remaining work process (remaining batch) is set (S19). Return to step 1 to produce cement milk, and if there are no remaining work processes (remaining batches) and the operation is not continuous, operate the automatic operation end button 49 to stop the batcher plant and finish the production work. (Washing work for the mixer 3 and the like is performed separately).

DESCRIPTION OF SYMBOLS 1... Batcher plant, 2... Frame frame body, 3... Mixer, 4... Agitator, 5... Silo, 6... Water storage tank, 8... Horizontal conveying device, 9... Vertical conveying device, 10... Discharge chute, 11... Conveying hose , 15...Internal cement supply hose, 16...Cement lifting drive motor, 18...Water supply pump, 19...Water supply hose, 20...Internal water supply pipe, 21...Open/close valve, 22...Water supply motor, 24...Kneading trough, 25 Weight measuring instrument 26 Stirring blade 27 Stirring motor 28 Discharge port 29 Open/close valve 30 Storage gutter 31 Rotary blade 32 Drive motor 40 Conveyance hose 41 Conveyance pump 45... Control unit (operation panel), 46... Display operation unit (touch panel), 47... Operation changeover switch, 48... Automatic operation start button, 49... Automatic operation end button, 50... Automatic operation lamp, 51... Agitator ON/OFF switch , 52... Mixer on/off switch 53... Water supply pump on/off switch 54... Cement pumping drive motor on/off switch 55... Emergency stop button 56... Control power lamp 57... Emergency stop lamp 58... Operation time display Portion 59 Printer for recording 60 Insertion port 61 Data input unit 63 Storage unit 65 Middle door 66 Window 67 Automatic correction switch 68 Automatic correction control display B Bentonite Setpoint, L...water setpoint, M...water measurement value, N...cement setpoint, P...automatically corrected cement setpoint, R...automatically corrected bentonite setpoint.

Claims (4)

A water set value L set to an amount that should be cement milk, which is a preset amount, in the mixer 3 of the batcher plant 1 installed at the work site of pile driving or ground improvement, or near the work site. is supplied to the mixer 3, and the amount of water actually supplied to the mixer 3 after the water supply is completed is measured by the weight measuring instrument 25 to obtain the measured water value M. When L and the measured water value M do not match, the amount of cement to be added to the water of the measured water value M is calculated so as to be the ratio of the amount of cement to the predetermined amount of water calculated in advance, and this automatically corrected value is calculated. A batcher plant method for producing cement milk in which a cement amount is supplied to a mixer 3. 2. The method of manufacturing cement milk in a batcher plant according to claim 1, wherein said automatically corrected amount of cement is set so that the proportion of cement in the ratio of water to cement in cement milk is always greater. In claim 1 or claim 2, the set water value L and the measured water value M are compared, and when the set water value L and the measured water value M do not match, a ratio of a predetermined ratio to the set water value L is obtained. The amount of cement is calculated, this automatically corrected amount of cement is supplied to the mixer 3, the water set value L, the measured water value M and the automatically corrected amount of cement at this time are printed and stored, and cement milk production in the next process. batcher plant cement milk production method. A kneading gutter 24 of a mixer 3 is suspended from a frame body 2 having a predetermined shape by a plurality of weight measuring instruments 25, and the mixer 3 is connected to an internal cement supply hose 15 connected to a silo 5 and a water storage tank 6. The vertical conveying device 9 of the silo 5 and the water supply pump 18 of the water storage tank 6 are configured to be driven by an operation unit 45, and the operation unit 45 controls a preset water set value. The amount of water actually supplied by the water storage tank 6 is measured by the weight measuring instrument 25 so that the cement amount of the cement set value N for the water amount of L is obtained. A batcher plant configured to supply cement from a silo 5 to a mixer 3 by calculating a corrected amount of cement with respect to the amount of water.

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