JP2020093424A - Cement milk production method in batcher plant, and batcher plant - Google Patents

Abstract

To solve the problem that the measurement of weight of cement milk by a weight measuring instrument to obtain a desired amount of cement milk is merely the measurement of the weight of the cement milk after being mixed and poured, and the mixing ratio of water and cement cannot be correctly grasped and the quality of the cement milk varies.SOLUTION: A cement milk production method in a batcher plant has a process where, to a mixer 3 of a batcher plant 1 installed in a work site of pile driving or ground improvement or in the vicinity of the work site, water of a water set value L set to have an amount for obtaining cement milk in a pre-set amount is supplied, the amount of the water actually supplied to the mixer 3 is measured by a weight measuring instrument 25 so as to be a water measured value M, the water set value L and the water measured value M are compared, when the water set value L and the water measured value M are incompatible, the amount of cement so as to have a prescribed ratio to the water set value L is calculated, and the automatically corrected amount of cement is supplied to the mixer 3.SELECTED DRAWING: Figure 4

Description

The present invention relates to a cement milk manufacturing method for a batcher plant and a portable batcher plant.

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

Japanese Patent Laid-Open No. 8-281632

In the above-mentioned known example, in order to obtain a desired amount of cement milk, the weight of the cement milk is measured by a weight measuring device, but the weight of the cement milk after being mixed and added is merely 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.
INDUSTRIAL APPLICABILITY The present invention devises a process for producing cement milk so that cement milk of stable quality can be supplied.

The invention of claim 1 is set in a mixer 3 of a batcher plant 1 installed in a work site for pile driving or ground improvement, or in the vicinity of the work site, in an amount that is a preset amount of cement milk. The water having the water set value L is supplied, and the water amount actually supplied to the mixer 3 is measured by the weight measuring device 25 to be the water measured value M. The water set value L and the water measured value M are compared, When the set value L and the water measured value M do not match, the cement amount of a predetermined ratio to the water set value L is calculated, and the cement amount of the batcher plant that supplies this automatically corrected cement amount to the mixer 3 is calculated. This is a milk production method.
A second aspect of the present invention is a cement milk manufacturing method for a batcher plant, wherein the automatically corrected cement amount is set so that the ratio of the cement amount is always large in the ratio of water to cement in the cement milk. It was done.
The invention of claim 3 compares the water set value L and the water measured value M, and when the water set value L and the water measured value M do not match, the cement amount which becomes a ratio ratio of a predetermined ratio to the water set value L Is calculated, and this automatically corrected cement amount is supplied to the mixer 3, and the water set value L, the water measurement value M, and the automatically corrected cement amount at this time are printed and stored, and the cement milk production in the next step is performed. This is a cement milk manufacturing method for a batcher plant.
According to the invention of claim 4, the kneading gutter 24 of the mixer 3 is hung on the frame body 2 of a predetermined shape by a plurality of weight measuring devices 25, and the mixer 3 is connected to the silo 5 by an internal cement supply hose 15 And the internal water supply pipe 20 connected to the water storage tank 6 are connected to each other, and the vertical transfer 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. The water supply set amount and the water supply measured amount are measured by the weight measuring device 25 to measure the water amount actually supplied by the water storage tank 6 so that the cement amount becomes the cement amount of the cement set value N relative to the water amount of the preset water set value L. The batcher plant is configured to calculate the corrected cement amount relative to the actual supplied water amount and to supply the cement from the silo 5 to the mixer 3.

In the invention of claim 1, when the cement milk is manufactured, the cement supply amount is automatically corrected so that the ratio of the predetermined ratio to the water set value L becomes a ratio in light of the water amount actually supplied to the mixer 3. The mixing ratio accuracy of water and cement can be improved, and accurate and uniform cement milk can be produced.
In the invention of claim 2, since the cement amount corrected automatically is set so that the ratio of the cement content is always large in the ratio of water to cement in the cement milk, the appropriate cement-containing component is obtained. The cement milk can be made stable and the quality of the cement milk can be stabilized.
According to the third aspect of the present invention, the cement amount, which is a predetermined ratio to the water amount supplied to the mixer 3, is automatically corrected and supplied to the mixer 3. At this time, the water set value L, the water measurement value M, and the automatically corrected cement are set. Since the amount is printed and stored, the ratio of the amount of cement to the amount of water can be examined in detail, and the quality of cement milk can be improved.
In the invention of claim 4, the operation unit 45 measures the water amount actually supplied from the water storage tank 6 by the weight measuring device 25 so that the cement amount of the cement setting value N becomes the amount of cement of the water setting value L set in advance. Then, the set amount and the measured amount are compared to calculate the corrected cement amount for the actual supplied water amount and the cement is supplied from the silo 5 to the mixer 3. Therefore, the water storage pump 6 is supplied from the water storage tank 6 installed at the work site. Even in the batcher plant 1 of the type that supplies water by the above, it is possible to produce cement milk with accurate and uniform mixing ratio accuracy and stable quality, and it is possible to reduce the installation space of the portable batcher plant 1. A space saving of the batcher plant can be realized, and cement milk can be produced by controlling the timings of water and cement by controlling each part by the operating part 45, so that the operating part of the existing batcher plant 1 can be manufactured. By improving 45, a low cost and highly accurate batcher plant can be provided.

The side view of a batcher plant. The same plan view. The schematic circuit diagram. Flow chart. The front view of a control part (operation panel). The same part enlarged view. The front view of the display operation part (touch panel) of a control part (operation panel).

An embodiment of the present invention will be described with reference to the drawings. 1 is a portable batcher plant, 2 is a frame frame body of the batcher plant 1, and the frame frame body 2 mixes water and cement with cement milk. And the agitator 4 for temporarily storing the cement milk produced by the mixer 3 while stirring it so as not to harden.
A silo 5 for storing cement to be supplied to the mixer 3 and a water storage tank 6 for storing water added to the cement are 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. The end of the vertical transfer device 9 is connected to a discharge chute 10 provided on the upper part of the silo 5, and the discharge chute 10 is connected to a transfer hose 11 for sending cement to the mixer 3.
The end of the transfer hose 11 is connected to the internal cement supply hose 15 connected to the mixer 3 provided in the frame body 2.

Reference numeral 16 is a cement lifting drive motor for driving the lateral transport device 8 and the vertical transport device 9.
The configuration 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 the present embodiment, two water supply pumps 18 are provided in order to shorten the water supply time to the mixer 3, but one water supply pump 18 may be provided, or two or more water supply pumps 18 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 start end 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 which is opened/closed by an actuator (not shown) is provided in the middle of the internal water supply pipe 20, and when the predetermined amount of water is supplied to the mixer 3, the opening/closing valve 21 is closed. The supply accuracy of 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 water supply stop and the discharge stop. Although water flows into the mixer 3 by the amount of time lag, the accuracy of the amount of water supplied decreases, but when the amount of water flowing into the mixer 3 reaches a predetermined amount of water, the water supply pump 18 is stopped and the on-off valve 21 is opened at the same time. By closing the, it is possible to improve the supply accuracy of the supply amount of the supply water supplied to the mixer 3. Reference numeral 22 is a water supply motor of the water supply pump 18.
In the mixer 3, a kneading gutter 24 is suspended in the frame body 2 so as to be vertically movable, and a weight measuring device (load cell) 25 is attached to the kneading gutter 24. The weight measuring devices 25 are installed at three locations in consideration of the weight balance of the kneading gutters 24 so that the weight of the kneading gutters 24 can be accurately measured. Measure the weight.

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 gutter 24. Reference numeral 29 is an open/close valve.
The storage gutter 30 of the agitator 4 faces below the discharge port 28 of the kneading gutter 24. The 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.
Reference numeral 35 is a detector for detecting the amount of cement milk in the storage gutter 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 middle of the transport hose 40.

A control unit (operation panel) 45 is connected to the pump and controls the operations thereof. The configuration of the control unit (operation panel) 45 is arbitrary, and an outline will be described below. FIG. 5 is a front view of the operation panel (control unit) 45, and FIG. 6 is a partially enlarged view of the operation panel (control unit) 45. In FIG. 5, reference numeral 46 denotes a display operation unit (touch panel) which displays the operating state of the plant at normal times and switches screens to input each setting.
Reference numeral 47 denotes an operation changeover switch, which switches the operation method between automatic cleaning of the mixer 3 and automatic operation and manual operation. When automatic operation is selected, water, bentonite, and cement are automatically measured, After kneading with the mixer 3 for the set kneading time, the mixture is discharged to the agitator 4 and, if automatic washing is selected, the water in the mixer 3 is automatically and continuously washed after the cement milk production work is completed. When manual operation is selected, each motor is manually operated/stopped and valves are opened/closed.

In FIG. 6, reference numeral 48 denotes 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. Reference numeral 50 denotes an automatic operation lamp, which lights up during automatic operation and turns off when stopped.
Reference numeral 51 denotes an on/off switch of the agitator 4, which operates/stops rotation of the agitator 4 when manual operation is selected. Reference numeral 52 denotes an on/off switch of the mixer 3, which operates/stops rotation of the mixer-3 when manual operation is selected. Reference numeral 53 is an on/off switch of the water supply pump 18, which is operated when manual operation is selected. Reference numeral 54 is an on/off switch of the cement lifting drive motor 16 of the silo 5, and 55 is an emergency stop button.

Further, in FIG. 5, reference numeral 65 denotes an inner door, and when the inner door 65 is opened, various lamps and the like described later are provided. 66 is a window of the middle door 65. Reference numeral 56 is a control power lamp, which lights up when the batcher plant 1 is powered on. 57 is an emergency stop lamp, which lights up during an emergency stop. Reference numeral 58 denotes an operating time display unit, which displays the cumulative operating time of the batcher plant 1 and is used for determining the maintenance time.
Reference numeral 59 denotes a recording printer, which prints work data such as operating time, water amount, and cement amount for each predetermined work. Reference numeral 60 is an insertion port of 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, in addition to the work data such as the operating time, water amount, and cement amount of the batcher plant 1 described above, the control unit (operation panel) 45 displays the batcher plant by the display operation unit (touch panel) 46 before the start of the work. A storage unit 63 is provided for storing the input data and the like that has been set and input for each unit of No. 1, and the data stored in the storage unit 63 can be selected and printed by the recording printer 59.
Therefore, the state of cement milk, work data, input data, and the like can be compared and examined, and the quality of 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/cement is set on this screen. 67 is an automatic correction closing switch.
FIG. 7B shows a display during operation. Reference numeral 68 denotes an automatic correction control display indicating that the automatic correction control is being executed.
It should be noted that the numbers in FIG. 7 are shown as examples of display for ease of understanding, and do not show values actually input.

(Operation of Embodiment)
The present invention has the above-described configuration, and transports and installs the batcher plant 1 at a work site for pile driving or ground improvement, or near the work site. Further, a silo 5 and a water storage tank 6 are installed in the vicinity of the batcher plant 1, and an internal cement supply hose 15 in the silo 5 of the batcher plant 1 is connected to a transfer hose 11 of the silo 5 to supply water to the water storage tank 6. The internal water supply pipe 20 of the frame body 2 is connected to the hose 19.
When water and cement are added to the mixer 3 of the batcher plant 1 and kneaded, it becomes cement milk, and in order to obtain a desired amount of cement milk, water and cement may be added at a predetermined ratio, but a set amount of The supply of water is unexpectedly difficult, and the water supply pump 18 does not have a constant discharge amount of water so that a so-called pulsation occurs in the supply hose. For example, when trying to discharge 10 liters of water for 10 minutes, the first minute Is 0.9 liter and the next minute is 1.2 liter, and when water is actually discharged for 10 minutes, the supply amount may vary from 9.5 to 10.5 liter.

Therefore, even if the control program of the control unit (operation panel) 45 is simply created on the basis of the specifications table of the water supply pump 18, a desired set ratio of water and cement cannot be obtained as cement milk. Sometimes.
Further, it is difficult to supply the set amount of water due to other factors such as the water level of the water storage tank 6 and the opening/closing error of the open/close valve 21, and the accuracy of the ratio of water to cement is deteriorated.
Therefore, in the batcher plant 1 having the above-described configuration, the operation is performed as described below so that cement milk having an accurate mixing ratio of water and cement according to the set ratio can be obtained.
First, the automatic operation start button 48 of the control unit (operation panel) 45 is operated to start the operation of the batcher plant 1 (S1).

The control unit (operation panel) 45 energizes the water supply pump 18 of the water storage tank 6 to supply the water (hereinafter, referred to as water set value L) set for one batch (one step) to the mixer 3 to set the water set value L. Then, 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 weight measuring device 25 (S2), and the amount of water actually supplied to the mixer 3 (hereinafter, water metering). The value M) is detected.
In this case, since the amount of water actually supplied to the mixer 3 (water measurement value M) does not match the water setting value L, the water setting value L and the water measurement value M do not match. When the automatic correction closing 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). If the water set value L is large, The ratio (W/C) of the cement amount to the water measurement value M is calculated so that the cement amount to the predetermined water amount (hereinafter, 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=the automatically corrected cement set value P is calculated (S6), and this automatically corrected cement set value P is reflected in the control (S7).
When the automatically-corrected cement set value P is calculated, the ratio (B/C) of the bentonite set value B of the amount of bentonite (additive) to be supplied to a predetermined set amount of cement is calculated ( S8). In S8, "B/C" is the ratio of bentonite and cement.
Next, the automatic correction cement setting value P/ratio (B/C)=the automatic correction bentonite setting value R is calculated (S9).
Therefore, since the automatically corrected bentonite set value R is the bentonite amount calculated based on the cement amount that should 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 by 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, the bentonite is supplied to the mixer 3, and the bentonite is set. When it is supplied to the mixer 3, the weight measuring device 25 measures the weight of the mixer 3, and when the bentonite is supplied so as to have the automatically corrected bentonite set value R, the supply of the bentonite is stopped (S12).
Here, it means that water and bentonite of correct ratios have been supplied to the mixer 3, and when the supply of bentonite is stopped, the stirring motor 27 of the mixer 3 is energized to rotate the stirring blades 26 for a predetermined time. Knead (S13).
After kneading for a predetermined time, the stirring blade 26 of the mixer 3 is automatically stopped.
Next, the lateral transfer device 8 and the vertical transfer device 9 of the silo 5 are energized to supply the cement to the mixer 3 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 device 25 measures the weight of the mixer 3, and when the cement having the amount of the automatically corrected 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 the correct proportions of water and bentonite, and the stirring motor 27 of the mixer 3 is again energized to rotate the stirring blades 26 and knead for a predetermined time. (S16).
When the mixer 3 is kneaded for a predetermined time, the stirring motor 27 is de-energized and the stirring blade 26 is stopped.
At the same time, the discharge routine of the mixer 3 is started (S17), and the recording printer 59 executes a batch print routine for printing work data such as operating time, water amount, and cement amount 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 rotary blades 31 are rotated by the drive motor 32 in the agitator 4 to prevent the cement milk from solidifying, and the cement milk is conveyed from the agitator 4. It is supplied to the pile driving or ground improvement device via the pump 41.
On the other hand, in the mixer 3, it is determined whether or not the remaining work process (remaining batch) is input and set (S19), and when there is the remaining work process (remaining batch), and in the case of continuous operation, step Returning to step 1, the cement milk is produced, and when there is no remaining work process (remaining batch) and it is not continuous operation, the automatic operation end button 49 is operated to stop the batcher plant and end the production operation. (The cleaning work of the mixer 3 etc. is performed separately).

1... Batcher plant, 2... Frame body, 3... Mixer, 4... Agitator, 5... Silo, 6... Water tank, 8... Horizontal transport device, 9... Vertical transport device, 10... Discharge chute, 11... Transport hose , 15... Internal cement supply hose, 16... Cement pumping drive motor, 18... Water supply pump, 19... Water supply hose, 20... Internal water supply pipe, 21... Open/close valve, 22... Water supply motor, 24... Mixing gutter, 25 ...Weight measuring device, 26...stirring blade, 27...stirring motor, 28...discharging port, 29...opening/closing valve, 30...storage gutter, 31...rotor blade, 32...driving motor, 40...transport hose, 41...transport 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 lifting drive motor on/off switch, 55... Emergency stop button, 56... Control power lamp, 57... Emergency stop lamp, 58... Hours display Section, 59... recording printer, 60... insertion slot, 61... data input section, 63... storage section, 65... inner door, 66... window, 67... automatic correction input switch, 68... automatic correction control display, B... bentonite Set value, L... Water set value, M... Water measurement value, N... Cement set value, P... Automatically corrected cement set value, R... Automatically corrected bentonite set value.

Claims (4)

Water having a water set value L set to a predetermined amount of cement milk in a mixer 3 of a batcher plant 1 installed at a work site for pile driving or ground improvement, or near the work site. Is supplied and the amount of water actually supplied to the mixer 3 is measured by the weight measuring device 25 to obtain a water measured value M, and the water set value L and the water measured value M are compared to obtain the water set value L and the water measured value. A method for producing cement milk in a batcher plant, which calculates a ratio of cement having a predetermined ratio to the water set value L when M does not match, and supplies the automatically corrected cement amount to the mixer 3. The cement milk manufacturing method of a batcher plant according to claim 1, wherein the automatically corrected cement amount is set such that the ratio of the cement amount is always large in the ratio of water to cement in the cement milk. In Claim 1 or Claim 2, the water set value L and the water measured value M are compared, and when the water set value L and the water measured value M do not match, a ratio ratio of a predetermined ratio to the water set value L is obtained. The cement amount is calculated, and this automatically corrected cement amount is supplied to the mixer 3. The water set value L, the water measurement value M, and the automatically corrected cement amount at this time are printed and stored, and the cement milk is produced in the next step. Method for producing cement milk for batcher plant. A kneading gutter 24 of a mixer 3 is hung on a frame body 2 of a predetermined shape by a plurality of weight measuring devices 25, and an internal cement supply hose 15 connected to a silo 5 and a water storage tank 6 are connected to the mixer 3. The vertical transfer 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 configured to set a preset water set value. The water amount actually supplied by the water storage tank 6 is measured by the weight measuring device 25 so that the cement amount is the cement amount N for the water amount L. A batcher plant configured to calculate a corrected cement amount for water amount and to supply the cement from the silo 5 to the mixer 3.

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