JP5258733B2 - Air mortar production equipment - Google Patents

Description

  The present invention relates to an air mortar production apparatus that continuously produces air mortar by mixing mortar and bubbles with a mixer.

In an air mortar produced by mixing bubbles with a mortar serving as a base before mixing bubbles (hereinafter referred to as “base mortar”), it is required to make the properties uniform. The most important point is to set the air content to a set value.
As a method for producing such an air mortar, conventionally, the following methods are generally performed.
A foaming liquid obtained by diluting the stock solution at a predetermined magnification is generated, and the generated foaming liquid is sent to a delivery pipe by a pump. Then, it was mixed with air in the middle of the delivery pipe to create a foam. The amount of foaming liquid and air was adjusted by manual valves while observing the state of foam created by experienced engineers. And the sample was extract | collected and the specific gravity of foam (foam | foam), air content, etc. were measured and it was set as management data.
Also, when the foam (foam) and mortar are mixed to make an air mortar (final product), the engineer observes the state of the product before construction and adjusts the amount of foaming liquid and the amount of air. Samples were collected for quality control. An experienced engineer constantly monitors the air mortar to be placed in the middle of the construction, and adjusts the mixing amount of the material each time the property of the air mortar changes.

  Since air is a compressed body, it takes time to adjust the air amount manually following the fluctuation of pressure load, and to obtain the optimum foam (foam) by adjusting the air amount and the amount of foaming liquid to a predetermined mixing ratio In addition, extra time was required. In addition, since the pressure load fluctuates depending on the placement environment (pipe length, pipe diameter, gradient, etc.), it is inevitable to monitor an experienced engineer in order to perform stable quality construction.

For this reason, a study on automation is made, and an example thereof is proposed in Patent Document 1.
In the air mortar placing method disclosed in Patent Document 1, a “foamer” that mixes a foaming agent solution and air to generate bubbles is disposed in the front stage of the mixer, and at least air that flows in a pipe line. Three items of mortar flow rate Q ₀ and gauge pressure P ₀ and base mortar flow rate Qb introduced into the mixer are monitored, and the air content of air mortar supplied to the placement site using these measured values (Volume%) is estimated, and automatic control is performed in real time to adjust at least the flow rate Qa of the air fed into the foamer so that the estimated value of the air content rate approaches the target value (see Patent Document 1). ).

And the following formulas are proposed as an estimation formula of air content rate.
Air content (Vol.%) = [{Q ₀ − (Qb + Qk)} × (1 + P ₀ )] / {Q ₀ (1 + P ₀ ) − (Qb + Qk) P ₀ } × 100 (1)
here,
Q ₀ : Flow rate of air mortar flowing through the air mortar pipe line 20 (L / min)
Qb: Base mortar flow rate (L / min) introduced into the mixer 17
Qk: Flow rate of foaming agent solution introduced into the foaming device 24 (L / min)
P ₀ : Gauge pressure (atm) of air mortar flowing through the air mortar pipe line 20

JP 2009-150193 A

However, the method disclosed in Patent Document 1 is to estimate the air content by measuring the flow rate of the air mortar, the flow rate of the base mortar, and the like, and uses the above formula (1). As can be understood by referring to the equation (1), the method of Patent Document 1 measures the base mortar amount and the air mortar amount to calculate the air content, so that the base mortar amount is large at the time of measurement. It is assumed that it will not fluctuate.
However, a predetermined time is required until the base mortar starts to flow after the supply of the base mortar, and in other words, the base mortar amount changes until the base mortar amount reaches the predetermined amount. In some cases, it is necessary to change the amount of base mortar due to construction reasons.
Thus, in actual construction, there are many situations in which the amount of base mortar changes. However, in the method of Patent Document 1, it is necessary to assume that the amount of base mortar has a substantially constant flow rate. In such a construction, measurement cannot be performed until the amount of base mortar becomes constant in actual construction. This is inconvenient.

  The present invention has been made to solve such a problem, and provides an air mortar production apparatus capable of producing air mortar having stable properties even when the supply amount of base mortar changes every moment. The purpose is that.

(1) An air mortar manufacturing apparatus according to the present invention is provided in a base mortar supply pipe through which a base mortar flows, receives a supply of base mortar and bubbles, and continuously mixes both, and bubbles in the mixing tube A foam cylinder that is provided in a bubble supply pipe that supplies air and foaming liquid to generate bubbles , a foaming liquid pipe that supplies the foaming liquid to the foaming cylinder, and a raw solution that supplies the foaming liquid pipe An air mortar production apparatus comprising a stock solution pipe, a dilution water pipe for supplying dilution water to the foam liquid pipe, and an air pipe for sending compressed air to the foam cylinder, and continuously producing air mortar,
Base mortar flow rate detecting means for detecting the flow rate of the base mortar flowing through the base mortar supply pipe , and bubbles corresponding to the base mortar flow rate detected by inputting detection signals of the base mortar flow rate detecting means at predetermined time intervals Gas-liquid mixing amount calculation means for calculating the mixing amount of the foaming liquid and air necessary for generation, and gas-liquid supply for controlling the supply amount of the foaming liquid and the air based on the calculated value of the gas-liquid mixing amount calculation means A volume control means ; a stock flow rate detection means for detecting the flow rate of the stock solution provided in the stock solution pipe; a dilution water flow rate detection means for detecting the flow rate of dilution water provided in the dilution water pipe; and the air pipe. An air flow rate detecting means provided to detect the air flow rate ,
The gas-liquid mixture amount calculating means includes dilution water amount setting value calculating means for calculating a dilution water amount setting value corresponding to the base mortar flow rate detected by the base mortar flow rate detecting means, and corresponding to the dilution water amount setting value. Consists of a stock solution amount set value calculating means for calculating a stock solution amount set value and an air amount set value calculating means for calculating an air amount set value corresponding to the dilution water amount set value,
The gas-liquid supply amount control means compares the stock solution amount set value calculated by the stock solution amount set value calculation means with the detection value of the stock solution flow rate detection means, and performs a feedback control for the stock solution amount control means, and the dilution A dilution water amount control means for performing feedback control by comparing a dilution water amount set value calculated by the water amount set value calculation means with a detection value of the dilution water flow rate detection means, and an air calculated by the air amount set value calculation means It is characterized by comprising an air amount control means for performing feedback control by comparing the amount set value and the detection value of the air flow rate detection means .

(2) Further, in the above (1), it has a base mortar supply pump for sending the base mortar to the pipe, and a base mortar supply pump control means for controlling the supply amount of the base mortar supply pump, based mortar supply pump control means compares the base mortar flow amount that has been detect the supply amount and the set value by said base mortar flow amount detecting means of the base mortar, is characterized in that performing feedback control .

( 3 ) Further, in any of the above (1) or ( 2 ), the mixing cylinder includes a fluid merging unit for merging the base mortar and the bubbles, and a fluid agitation mixing unit for agitating and mixing the merged fluid. The fluid merging section has a first delivery pipe for delivering base mortar, and a second delivery pipe for delivering bubbles by having a discharge port inserted into the first delivery pipe coaxially with the first delivery pipe; A fluid equalizing member having a conical surface provided to face the outlet of the second delivery pipe is provided.

( 4 ) Further, in the above ( 3 ), there is provided a means for adjusting an interval between the fluid equalizing member and the discharge port of the second delivery pipe.

  In the present invention, the base mortar flow rate detecting means for detecting the flow rate of the base mortar flowing through the piping, and the detection signal of the base mortar flow rate detecting means are input at predetermined time intervals to correspond to the detected base mortar flow rate. Gas-liquid supply amount control means for controlling the supply amount of the raw material liquid and the air based on the calculated value of the gas-liquid mixture amount calculation means for calculating the blending amount of the raw material liquid and air necessary for generating bubbles Even if the base mortar flow rate changes, bubbles corresponding to the current base mortar flow rate are generated and supplied to the mixing cylinder, and mixed with the base mortar in the mixing cylinder to generate air mortar. Therefore, the properties of the air mortar can be kept homogeneous even when the base mortar flow rate changes.

It is explanatory drawing of the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is a block diagram explaining the management unit of the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is a flowchart explaining the control operation of the mortar conveyance pump in the management unit of the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is a flowchart explaining the control action of the foaming liquid pump in the management unit of the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is a flowchart explaining the control operation of the concentrate pump in the management unit of the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is a flowchart explaining the control operation | movement of the air flow regulator in the management unit of the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is explanatory drawing of the other aspect of the foaming liquid supply line in the air mortar manufacturing apparatus which concerns on one embodiment of this invention. It is explanatory drawing of the mixing cylinder in other embodiment of this invention. It is an enlarged view which expands and shows a part of mixing cylinder shown in FIG. FIG. 10 is an enlarged view of a part A shown by being circled in FIG. 9. It is explanatory drawing of a prior art example. It is explanatory drawing of the mixing cylinder in other embodiment of this invention, and is an enlarged view which expands and shows a fluid confluence | merging part. It is explanatory drawing explaining the effect | action of the fluid confluence | merging part shown in FIG. It is explanatory drawing explaining the arrangement | positioning relationship of the fluid confluence | merging part shown in FIG.

An air mortar manufacturing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
The air mortar manufacturing apparatus 1 according to the present embodiment includes a mixing plant 3 that generates base mortar, a mortar pressure feed pump 7 that supplies the base mortar generated in the mixing plant 3 to a base mortar supply pipe 5, and base mortar supply. A base mortar flow rate detector 9 installed in the pipe 5 for detecting the flow rate of the base mortar, and provided at the end of the base mortar supply pipe 5 through which the base mortar flows and receiving the supply of the base mortar and the bubbles, A mixing cylinder 11 to be mixed, and a bubble generating device 15 that generates necessary bubbles based on information from the base mortar flow rate detector 9 and supplies the generated bubbles to the mixing cylinder 11 via the bubble supply pipe 13. I have.
An air mortar supply pipe 17 is connected to the mixing cylinder 11, and the air mortar supply pipe 17 is piped to an air mortar placement site. The air mortar supply pipe 17 is provided with an air mortar flow detector 19 for detecting the air mortar flow rate.
Each component will be described in more detail.

<Mixing plant>
The mixing plant 3 continuously and automatically creates a mortar that is a base of an air mortar that is a final product.
Here, the base mortar is a slurry obtained by mixing water, cement, fine aggregate, cement admixture, and the like. Alternatively, it contains cement milk excluding fine aggregates.
<Mortar transport pump>
The mortar conveyance pump 7 conveys cement milk and mortar produced at the mixing plant 3. The mortar transport pump 7 has a discharge control function by an inverter, and the discharge amount is controlled by a control signal from a management unit 27 described later.

<Base mortar flow detector>
The base mortar flow rate detector 9 transmits the mortar pumping amount of the mortar pumping pump 7 to the management unit 27 described later.
<Air mortar flow meter>
The air mortar flow meter calculates the flow rate of the placed air mortar and records it in analog form on a recording sheet.

<Mixing cylinder>
The mixing cylinder 11 mixes the bubbles created by the bubble generating device 15 and the base mortar to generate air mortar. In this Embodiment, the specific aspect of the mixing cylinder 11 is not specifically limited, A conventional thing can be used. For example, the mixing cylinder 11 includes a cylinder in which the base mortar flows, a bubble introduction pipe that is connected so as to be concentric with the axial center of the cylinder, and a flow composed of fixed blades at a position after merging. It is possible to apply a device equipped with a stirring mechanism using the energy of

<Bubble generator>
The bubble generation device 15 generates necessary bubbles based on the information of the base mortar flow rate detector 9 and supplies the generated bubbles to the mixing cylinder 11 via the bubble supply pipe 13.
The bubble generating device 15 having such a function includes a foaming liquid supply line 21 that mixes the stock solution and dilution water to generate and supply a foaming liquid having an appropriate concentration, and an air that supplies compressed air to be mixed with the foaming liquid. Based on the information of the supply line 23, the foaming cylinder 25 which mixes foaming liquid and air and produces | generates a bubble (foam | foam), and the base mortar flow rate detector 9, the components of the foaming liquid supply line 21 and the air supply line 23 are used. A management unit 27 for controlling is provided.
The diluted water is a “lightly diluted solution” for diluting the stock solution to a predetermined concentration, and most of the water is used.

[Foamed cylinder]
The foam cylinder 25 generates bubbles by mixing the foaming liquid and air. Specifically, the foaming liquid adjusted to a predetermined concentration introduced from the foaming liquid supply line 21 and an appropriate amount of air introduced from the air supply line 23 are mixed, and bubbles to be supplied to the mixing cylinder 11 are mixed. Generate. The generated bubbles are supplied to the mixing cylinder 11 via the bubble supply pipe 13.

[Foam supply line]
The foaming liquid supply line 21 is downstream of the diluting water pipe 29 for sending the diluting water from the diluting water tank, the undiluted liquid pipe 34 for sending the undiluted liquid from the undiluted liquid tank, and the junction of the diluting water pipe 29 and the undiluted liquid pipe 34. In addition, a foaming liquid pipe 36 is provided for feeding the diluting water and the undiluted solution into the foaming cylinder 25 as a foaming liquid.
The dilution water pipe 29 is provided with a dilution water flow rate detector 33 for detecting the dilution water flow rate. The stock solution pipe 34 is provided with a stock solution pump 35 for sending the stock solution from the stock solution tank and a stock solution flow rate detector 37 for detecting the stock solution flow rate. Further, the foaming liquid pipe 36 is provided with a dilution water pump 31 for sending the dilution water from the dilution water tank, and a static mixer 32 for promoting the mixing of the dilution water and the stock solution. The static mixer 32 mixes the dilution water and the stock solution. Is promoted and supplied to the foam cylinder 25.
The structure of the static mixer 32 may be a simple one in which a fixed blade or a baffle plate is provided in a part of the pipeline.
A check valve 39 is installed between the static mixer 32 and the foam cylinder 25. Further, a back pressure valve 41 for preventing the back flow of the dilution water and preventing overfeed of the stock solution is installed on the downstream side of the stock solution flow detector 37 in the stock solution pipe 34.
The dilution water pump 31 and the stock solution pump 35 are pumps that are controlled to be discharged by an inverter, and are feedback controlled so as to maintain a set discharge amount by a control signal from the management unit 27.
The dilution water pipe 29 and the stock solution pipe 34 may be joined directly without providing the static mixer 32.

[Air supply line]
The air supply line 23 is provided in an air pipe 43 that sends out compressed air generated by the compressor, and is provided in an air filter / dryer unit 45 that removes moisture, dust, and the like contained in the air, and is provided in the air pipe 43. An air flow rate detector 47 for detecting the flow rate, an air flow rate adjuster 49 for adjusting the amount of air flowing through the air pipe 43, an electromagnetic valve 51 that is closed when air delivery is stopped to prevent backflow of the foaming liquid, compressed air, A check valve 53 for preventing the backflow of the foaming liquid is provided.
The air flow rate adjuster 49 is constituted by an air valve or an air pressure adjuster, and is automatically controlled so as to have a set air flow rate controlled by a control signal from the management unit 27.
As the air flow rate detector 47, a mass flow meter that is not affected by pressure is preferably used.

[Management unit]
The management unit 27 inputs a signal from the base mortar flow rate detector 9 and controls components of the foaming liquid supply line 21 and the air supply line 23. The management unit 27 also controls the base mortar flow rate based on the signal from the base mortar flow rate detector 9.
More specifically, the management unit 27 includes a control computer 54, a display device 55, and the like. The management unit 27 receives the flow rate signals of the stock solution, the diluted water, and the air, and maintains the set value by the received measurement signal. , It has a function to automatically control each device.
Further, it also has a function of receiving data of the base mortar flow rate detector 9, the foaming liquid supply line 21, the air supply line 23, and the air mortar flow rate detector 19 and recording the data.

The functions of the control computer 54 constituting the management unit 27 having the above functions will be described with reference to the block diagram shown in FIG.
The control computer 54 includes a mortar pump control means 56, a dilution water amount set value calculation means 57, a dilution water amount control means 59, a stock solution amount set value calculation means 61, a stock solution amount control means 63, and an air amount set value calculation. Means 65 and air amount control means 67 are provided. These means are realized by the CPU mounted on the control computer 54 executing each program.
The dilution water amount set value calculating means 57, the stock solution amount set value calculating means 61, and the air amount set value calculating means 65 correspond to the gas-liquid mixture amount calculating means of the present invention. The dilution water amount control means 59, the stock solution amount control means 63, and the air amount control means 67 correspond to the gas-liquid supply amount control means of the present invention.

  The mortar pump control means 56 compares the set value of the supply amount of the base mortar with the base mortar flow rate detected by the base mortar flow rate detector 9, and controls the mortar transport pump 7 so that the base mortar flow rate becomes the set value. Feedback control.

The dilution water amount set value calculating means 57 receives the base mortar flow rate signal detected by the base mortar flow rate detector 9 and calculates a dilution water amount set value corresponding to the base mortar flow rate. When the base mortar set value is Q _Ms , the base mortar flow rate is Q _Mf , and the dilution water reference value corresponding to the base mortar set value is Q _Wr , the dilution water amount set value Q _Ws is calculated by the following equation.
Q _Ws = Q _Wr × (Q _Mf / Q _Ms )

The dilution water amount control unit 59 compares the dilution water amount set value Q _Ws calculated by the dilution water amount set value calculation unit 57 with the dilution water flow rate detected by the dilution water flow rate detector 33, and the dilution water flow rate is the dilution water amount. The dilution water pump 31 is feedback-controlled so that the set value Q _Ws is obtained.

The stock solution amount set value calculation means 61 inputs the dilution water amount set value Q _Ws calculated by the dilution water amount set value calculation means 57 and calculates the stock solution amount set value Q _Us corresponding to the dilution water amount set value Q _Ws. . When the stock solution reference value corresponding to the dilution water reference value Q _Wr is Q _Ur , the stock solution amount set value Q _Us is calculated by the following equation.
Q _Us = Q _Ur × (Q _Ws / Q _Wr )

The stock solution volume control means 63 compares the stock solution volume set value Q _Us calculated by the stock solution volume set value computing means 61 with the stock solution flow rate detected by the stock solution flow rate detector 37, and the stock solution flow rate is determined as the stock solution volume set value. The stock solution pump 35 is feedback-controlled so that Q _Us is obtained.

The air amount set value calculation means 65 receives the dilution water amount set value Q _Ws calculated by the dilution water amount set value calculation means 57 and calculates the air amount set value Q _As corresponding to the dilution water amount set value Q _Ws. . When the air reference value corresponding to the dilution water reference value Q _Wr is Q _Ar , the air amount set value Q _As is calculated by the following equation.
Q _As = Q _Ar × (Q _Ws / Q _Wr )

The air amount control means 67 compares the air amount set value Q _As calculated by the air amount set value calculating means with the air flow rate detected by the air flow rate detector 47, so that the air flow rate is the air amount set value Q _As. The air flow regulator 49 is feedback-controlled so that

Operation | movement of the air mortar manufacturing apparatus 1 of this Embodiment comprised as mentioned above is demonstrated.
When the start switch of the mixing plant 3 is pushed by the operator, the production of the base mortar is started. When the start of base mortar delivery is instructed, the mortar transport pump 7 is operated and the base mortar is supplied to the base mortar supply pipe 5.
When the base mortar is supplied to the base mortar supply pipe 5, the base mortar flow rate detector 9 detects the base mortar flow rate flowing through the base mortar supply pipe 5. A detection signal from the base mortar flow rate detector 9 is transmitted to the management unit 27. The mortar pump control means 56 of the management unit 27 feedback-controls the mortar transport pump 7 so that the flow rate of the base mortar becomes a set value.

The feedback control of the mortar transport pump 7 will be described with reference to FIG.
When the discharge of the base mortar is started (MS1), the mortar pump control means 56 compares the set value Q _Ms of the supply amount of the base mortar with the base mortar flow rate Q _Mf detected by the base mortar flow rate detector 9. (MS3). In this comparison, when the base mortar flow rate Q _Mf is smaller than the base mortar set value Q _Ms , control is performed to increase the rotational speed of the mortar transport pump 7 (MS5). On the other hand, when the base mortar flow rate Q _Mf is larger than the base mortar set value Q _Ms , control is performed to decrease the rotational speed of the mortar transport pump 7 (MS7).
This control is performed at predetermined time intervals, for example, every second, and by this control, the base mortar flow rate supplied to the base mortar supply pipe 5 is controlled to be a set value, and is controlled to maintain the set value. The

  When the base mortar is supplied to the base mortar supply pipe 5, bubbles corresponding to the flow rate of the base mortar flowing through the base mortar supply pipe are generated in the bubble generation device 15. Hereinafter, the control operation in the bubble generating device 15 will be described based on FIGS. 4, 5, and 6, respectively, in the order of dilution water control, stock solution control, and air control.

[Control of dilution water volume (see Fig. 4)]
In the management unit 27, the dilution water amount control means 59 inputs a signal from the base mortar flow rate detector 9, judges whether there is base mortar discharge (WS1), and if there is no base mortar discharge, Control is performed to stop the dilution water pump 31 (WS2).
When it is determined from the signal from the base mortar flow rate detector 9 that there is discharge of the base mortar, the dilution water amount set value calculating means 57 corresponds to the base mortar flow rate detected by the base mortar flow rate detector 9. The dilution water amount set value Q _Ws is calculated by the method described above (WS3).
When the dilution water amount set value Q _Ws is calculated, the dilution water amount control means 59 determines whether or not the dilution water pump 31 is operating (WS5), and if it is not operating, operates it (WS7). When the dilution water pump 31 is operating in the determination of WS5, and when the dilution water pump 31 is operated by WS7, the dilution water amount control means 59 uses the dilution water amount setting value Q _Ws and the dilution water flow rate detector. The dilution water flow rate QWf detected by 33 is compared (WS9). In this comparison, when the dilution water flow rate Q _Wf is smaller than the dilution water amount set value Q _Ws , control is performed to increase the rotation speed of the dilution water pump 31 (WS11). On the other hand, when the dilution water flow rate Q _Wf is larger than the dilution water amount set value Q _Ws , control is performed so as to reduce the rotation speed of the dilution water pump 31 (WS13).
This control is performed at predetermined time intervals, for example, every second, and the amount of dilution water supplied to the dilution water pipe 29 by this control is set corresponding to the amount of base mortar detected by the base mortar flow rate detector. It is controlled so as to become a value, and is controlled so as to maintain the set value.

[Control of stock volume (see Fig. 5)]
In the management unit 27, the undiluted solution amount control means 63 inputs a signal from the base mortar flow rate detector 9, judges whether or not there is base mortar discharge (US1), and when there is no base mortar discharge. The stock solution pump 35 is controlled to stop (US2).
When it is determined from the signal from the base mortar flow rate detector 9 that there is discharge of the base mortar, the stock solution amount set value calculating means 61 calculates the dilution water amount set value Q calculated by the dilution water amount set value calculating means 57. _The stock solution set value Q _Us corresponding to _Ws is calculated by the above-described method (US3).
When the stock solution amount set value Q _Us is calculated, the stock solution amount control means 63 determines whether or not the stock solution pump 35 is in operation (US5), and activates it if it is not in operation (US7). When the stock solution pump 35 is operating in the determination of US 5 and when the stock solution pump 35 is operated by US 7, the stock solution amount control means 63 detects the stock solution amount set value Q _Us and the stock solution flow rate detector 37. Compared undiluted solution flow rate Q _Uf (US9). In this comparison, when the stock solution flow rate Q _Uf is smaller than the stock solution amount set value Q _Us , control is performed to increase the number of revolutions of the stock solution pump 35 (US11). On the other hand, when the stock solution flow rate Q _Uf is larger than the stock solution amount set value Q _Us , control is performed to decrease the rotation speed of the stock solution pump 35 (US13).
This control is performed at predetermined time intervals, for example, every second, and the stock solution amount supplied to the stock solution pipe by this control is a set value corresponding to the diluted water amount set value Q _Ws calculated by the diluted water amount set value calculating means 57. And control to maintain the set value.

  The diluting water and stock solution controlled so as to supply a predetermined amount as described above are mixed by a static mixer 32 provided in the middle of the piping, and supplied to the foaming cylinder 25 as a foaming liquid.

[Control of air volume (see Fig. 6)]
In the management unit 27, the air amount control means inputs a signal from the base mortar flow rate detector 9, judges whether there is base mortar discharge (AS1), and if there is no base mortar discharge, air Control is performed to close the valve of the flow regulator 49 (AS2).
When it is determined that each material is discharged from the signals from the base mortar flow rate detector 9, the dilution water flow rate detector 33, and the stock solution flow rate detector 37, the air amount set value calculation means calculates the dilution water amount set value. The air amount set value Q _As corresponding to the dilution water amount set value Q _Ws calculated by the means 57 is calculated by the method described above (AS3).
When the air amount set value Q _As is calculated, the air amount control means determines whether or not the valve of the air flow regulator 49 is open (AS5), and if not, opens it (AS7). . When the air flow rate adjuster 49 is open in the determination of AS5, and when the air flow rate adjuster 49 is opened by AS7, the air amount control means includes the air amount set value Q _As and the air flow rate detector. The air flow rate Q _Af detected by 47 is compared (AS9). In this comparison, when the air flow rate Q _Af is smaller than the air amount set value Q _As , control is performed to increase the opening degree of the original air flow rate regulator 49 (AS11). On the other hand, when the air flow rate Q _Af is larger than the air amount set value Q _As , control is performed to decrease the opening degree of the original air flow rate adjuster 49 (AS13).
This control is performed at a predetermined time interval, for example, every second, and the amount of air supplied to the air pipe 43 by this control is set corresponding to the diluted water amount set value Q _Ws calculated by the diluted water amount set value calculating means 57. It is controlled so as to be a value and is controlled so as to maintain the set value, and is supplied to the foaming cylinder 25.

A predetermined amount of foaming liquid and a predetermined amount of air are supplied to the foaming cylinder 25, and the foaming liquid and air are mixed in the foaming cylinder 25 to generate bubbles (foam). The generated bubbles are supplied to the mixing cylinder 11 via the bubble supply pipe 13.
In the mixing cylinder 11, the base mortar and the bubbles are mixed to generate air mortar.

  As described above, according to the present embodiment, even when the base mortar flow rate changes, bubbles corresponding to the base mortar flow rate at that time are generated and supplied to the mixing cylinder 11, and the mixing cylinder 11 is mixed with the base mortar to produce air mortar, so that the properties of the air mortar can be kept homogeneous even if the flow rate of the base mortar changes.

In the above example, a dilution water tank and a stock solution tank are provided, respectively, and the amount of dilution water and the amount of the stock solution supplied from each tank are automatically controlled. The mixed foaming liquid may be manufactured in advance, stored in a foaming liquid tank, and supplied to the foaming cylinder 25 according to the base mortar flow rate.
In this case, as shown in FIG. 7, the foaming liquid supply pump 71 is supplied to the foaming liquid pipe 36 that supplies the foaming liquid from the foaming liquid tank to the foaming cylinder 25, and the foaming liquid flow rate detector detects the flow rate of the foaming liquid. 73, and the foaming liquid supply pump 71 may be feedback-controlled by comparing the foaming liquid flow rate calculated as an amount commensurate with the base mortar flow rate and the detection value of the foaming liquid flow rate detector 73.

[Embodiment 2]
In the present embodiment, a specific aspect of a mixing cylinder for more uniformly mixing base mortar and bubbles will be described.
FIG. 8 is a side view of mixing cylinder 300 according to Embodiment 2 of the present invention.
The mixing cylinder 300 produces air mortar by stirring and mixing two fluids having different properties such as bubbles and base mortar.
Here, the base mortar is a slurry obtained by mixing water, cement, fine aggregate, cement admixture, and the like. Or it contains cement milk excluding fine aggregates.

The mixing cylinder 300 includes a fluid merging unit 100 and a fluid stirring / mixing unit 200.
The fluid merging unit 100 is assumed to uniformly merge the bubbles and the base mortar. The fluid agitation / mixing unit 200 is a device that agitates and mixes the fluid uniformly joined by the fluid merging unit 100. In the present embodiment, a specific configuration of the fluid stirring / mixing unit 200 will not be described, but any known technique can be used.

The structure of the fluid confluence | merging part 100 is demonstrated based on FIG. 9, FIG. 9 is a side view of the fluid merging portion 100, and FIG. 10 is an enlarged view of the inside of the fluid merging portion. In addition, the conventional fluid confluence | merging part is shown in FIG. 11 as a comparative example for demonstrating the characteristic of the fluid confluence | merging part 100 of this Embodiment.
The fluid junction section 100 includes a first fluid delivery pipe composed of a 3-inch pipe 120 having a diameter of 3 inches, a second fluid delivery pipe comprising a 2-inch pipe 110 having a diameter of 2 inches, and a junction section piece 130 corresponding to a fluid equalization means. Prepare.
The 2-inch tube 110 is inserted into the 3-inch tube 120 from the side surface of the 3-inch tube 120 and discharges bubbles inside the 3-inch tube 120.

The confluence portion piece 130 is a member having a tip portion formed conically with the tip directed to the discharge port of the 2-inch tube 110, and is disposed at the discharge port of the 2-inch tube 110.
As shown in FIG. 10, a screw hole that is screwed with the set screw 140 is provided on the side surface of the joining portion piece 130 (see FIG. 10). By tightening the set screw 140, the junction piece piece 130 can be fixed at the central portion of the 3-inch pipe 120, that is, at a position coaxial with the 2-inch pipe 110 and the 3-inch pipe 120.
In addition, the diameter of each delivery pipe | tube is only an example, You may use the pipe | tube of sizes other than these. In addition, as a method for fixing the joining portion piece 130, a method other than the set screw 140 may be used.

Next, a process in which each fluid is mixed inside the fluid junction 100 configured as described above will be described.
The base mortar that has been pumped to the 3-inch pipe 120 is moved to the inner wall side of the pipe by the 2-inch pipe 110 to form a donut-shaped flow.
On the other hand, the air bubbles that have been pumped through the 2-inch tube 110 collide with the conical confluence portion top 130 at the discharge port of the 2-inch tube 110, thereby forming an umbrella shape toward the inner wall of the 3-inch tube 120. Discharged.
Bubbles discharged in an umbrella shape merge with the flow of the base mortar that has been pumped in a donut shape within the 3-inch tube 120.
As a result, the gas-liquid mixed fluid can be generated in a state where the bubbles and the base mortar are homogeneously mixed, so that the effect of the mixing process to be performed later can be enhanced and the role of assisting in creating a homogeneous air mortar can be played. it can.

  On the other hand, as shown in FIG. 11, in the conventional fluid merging apparatus without the merging portion top 130, the bubbles discharged from the 2-inch tube 110 diffuse gently toward the inner wall of the 3-inch tube 120. It is difficult to mix the base mortar homogeneously.

As described above, in the second embodiment, the merge piece top 130 is disposed at the discharge port of the 2-inch tube 110, and the bubbles discharged from the 2-inch tube 110 are umbrella-shaped toward the inner wall of the 3-inch tube 120. Since it is configured to be diffused, the bubbles and the base mortar can be mixed uniformly. Moreover, the mixing effect which the fluid stirring and mixing part 200 of a post process performs by this can be heightened.
Further, in the second embodiment, the merging section piece 130 is configured by a conical member whose tip is directed to the discharge port of the 2-inch tube 110, and therefore, the fluid merging / mixing effect is enhanced with a simple component configuration. This is advantageous from the viewpoint of component cost and the like.

[Embodiment 3]
In the third embodiment of the present invention, an example will be described in which the attachment position of the confluence portion piece 130 of the fluid confluence portion 100 can be changed. This makes it possible to adjust the flow rate and flow rate of bubbles discharged from the 2-inch tube 110.
FIG. 12 is a side view of the fluid merging unit 100 according to the third embodiment. In the fluid merging unit 100 according to the third embodiment, the 3-inch pipe 120 includes two parts, a 3-inch pipe front stage 121 and a 3-inch pipe rear stage 122. The 3-inch pipe front stage part 121 and the 3-inch pipe rear stage part 122 are connected by, for example, a stopper or a mounting screw.

Moreover, both attachment positions are comprised so that it can change. For example, the following configurations (1) and (2) are conceivable.
(1) Provide a plurality of screw holes for mounting screws so that the mounting position can be selected.
(2) A ring-shaped pad is sandwiched between the two so that the distance between the connecting portions of the 3-inch tube front stage 121 and the 3-inch tube rear stage 122 can be adjusted.
Note that the merge section piece 130 is configured integrally with the 3 inch pipe rear stage section 122, so that the relative position between the merge section piece 130 and the 2 inch pipe 110 can be changed by changing the mounting position of the 3 inch pipe rear stage section 122. Can be changed.

12 (a) and 12 (b) show how the position of the merge unit piece 130 changes.
In FIG. 12B, the attachment position of the 3-inch pipe rear stage portion 122 is moved in the fluid discharge direction as compared with FIG. Accordingly, the position of the merge unit piece 130 also moves in the same direction, and the distance between the 2-inch pipe 110 and the merge unit piece 130 is increased.

FIG. 13 is a diagram showing a change in the flow of the bubble group accompanying a change in the position of the merging section piece 130. FIG. 13A corresponds to the position of the merging section piece 130 in FIG. FIG. 12B corresponds to the position of the merge unit piece 130 in FIG.
When the position of the merging section piece 130 moves toward the downstream side (see FIG. 13B), the interval between the discharge port of the 2-inch pipe 110 and the merging section piece 130 increases, and the opening area of the 2-inch pipe 110 increases. As a result, the flow rate of the bubbles is reduced.
On the other hand, when the position of the merging portion piece 130 moves toward the bubble discharge port (see FIG. 13A), the interval between the discharge port of the 2-inch tube 110 and the merging portion piece 130 becomes narrow, and the 2-inch tube 110 Since the opening area of each of the bubbles becomes small, the flow velocity of the bubbles increases.

FIG. 14 is a schematic diagram for obtaining the size around the opening of the 2-inch tube 110.
The opening amount W and the opening area Q of the 2-inch tube 110 can be obtained geometrically as shown in FIG. What is necessary is just to adjust the attachment position of the confluence | merging part piece | piece 130 so that the opening amount W and the opening area Q may become a desired value according to the flow volume, the flow velocity, etc. of a bubble group or mortar.

  Further, by adjusting the values of the opening amount W and the opening area Q, the merging speed of the bubbles can be adjusted to an optimum value with respect to the planned mortar pumping amount and a predetermined amount of bubbles mixed therewith. Therefore, if an optimal opening ratio is found for each planned amount of air mortar production, stable quality air mortar can be produced.

In the third embodiment, the example has been described in which the 3 inch pipe rear stage portion 122 and the merging portion piece 130 are integrally configured so that the mounting position of the 3 inch pipe rear stage portion 122 can be changed. The same effect can be achieved by configuring the mounting position of the top 130 so that it can be changed.
For example, if a plurality of screw holes to be screwed with the set screw 140 are provided on the side surface of the joining piece piece 130 so that the attachment position of the joining piece piece 130 can be selected and the position where the set screw 140 is tightened is changed, the same The position of the merge unit piece 130 can be changed.

  As described above, in the third embodiment, since the interval between the joining port piece 130 and the discharge port of the 2-inch pipe 110 can be adjusted, the planned mortar pumping amount and the predetermined amount of bubbles mixed therewith can be adjusted. The optimum bubble merging speed can be adjusted, and the agitation / mixing efficiency in the subsequent process is increased, thereby contributing to the production of air mortar having desired physical properties.

DESCRIPTION OF SYMBOLS 1 Air mortar manufacturing apparatus 3 Mixing plant 5 Base mortar supply pipe 7 Mortar pressure feed pump 9 Base mortar flow detector 11 Mixing cylinder 13 Bubble supply pipe 15 Bubble generator 17 Air mortar supply pipe 19 Air mortar flow detector 21 Foaming liquid supply line DESCRIPTION OF SYMBOLS 23 Air supply line 25 Foaming cylinder 27 Management unit 29 Dilution water piping 31 Dilution water pump 32 Static mixer 33 Dilution water flow detector 34 Stock solution piping 35 Stock solution pump 36 Foam solution piping 37 Stock solution flow detector 39 Check valve 41 Back pressure valve 43 Air piping 45 Air filter / dryer unit 47 Air flow detector 49 Air flow controller 51 Solenoid valve 53 Check valve 54 Computer 55 Control device 56 Mortar pump control device 57 Diluted water amount set value calculation means 59 Diluted water amount control Stage 61 Stock solution amount set value calculation means 63 Stock solution amount control means 65 Air amount set value calculation means 67 Air amount control means 71 Foam supply pump 73 Foam solution flow detector 100 Fluid junction 110 2 inch tube 120 3 inch tube 121 3 Inch pipe front stage 122 3 inch pipe rear stage part 130 Joining piece 140 Set screw 200 Fluid stirring / mixing part 300 Mixing cylinder

Claims (4)

A mixing cylinder that is provided in a base mortar supply pipe through which the base mortar flows and receives the supply of the base mortar and bubbles and continuously mixes them, and a bubble supply pipe that supplies bubbles to the mixing cylinder and is provided with air and foam A foam cylinder that receives bubbles to generate bubbles, a foam liquid pipe that supplies the foam liquid to the foam cylinder, a raw liquid pipe that supplies the raw liquid to the foam liquid pipe, and a dilution water supply to the foam liquid pipe An air mortar manufacturing apparatus for continuously manufacturing air mortar , comprising a dilution water pipe to be supplied and an air pipe for sending compressed air to the foamed cylinder ,
Base mortar flow rate detecting means for detecting the flow rate of the base mortar flowing through the base mortar supply pipe , and bubbles corresponding to the base mortar flow rate detected by inputting detection signals of the base mortar flow rate detecting means at predetermined time intervals Gas-liquid mixing amount calculation means for calculating the mixing amount of the foaming liquid and air necessary for generation, and gas-liquid supply for controlling the supply amount of the foaming liquid and the air based on the calculated value of the gas-liquid mixing amount calculation means A volume control means ; a stock flow rate detection means for detecting the flow rate of the stock solution provided in the stock solution pipe; a dilution water flow rate detection means for detecting the flow rate of dilution water provided in the dilution water pipe; and the air pipe. An air flow rate detecting means provided to detect the air flow rate ,
The gas-liquid mixture amount calculating means includes dilution water amount setting value calculating means for calculating a dilution water amount setting value corresponding to the base mortar flow rate detected by the base mortar flow rate detecting means, and corresponding to the dilution water amount setting value. Consists of a stock solution amount set value calculating means for calculating a stock solution amount set value and an air amount set value calculating means for calculating an air amount set value corresponding to the dilution water amount set value,
The gas-liquid supply amount control means compares the stock solution amount set value calculated by the stock solution amount set value calculation means with the detection value of the stock solution flow rate detection means, and performs a feedback control for the stock solution amount control means, and the dilution A dilution water amount control means for performing feedback control by comparing a dilution water amount set value calculated by the water amount set value calculation means with a detection value of the dilution water flow rate detection means, and an air calculated by the air amount set value calculation means An air mortar manufacturing apparatus comprising an air amount control means for performing feedback control by comparing an amount set value with a detection value of the air flow rate detection means .
A base mortar supply pump for feeding the base mortar to the pipe; and a base mortar supply pump control means for controlling the supply amount of the base mortar supply pump. The base mortar supply pump control means sets the supply amount of the base mortar. comparing the base mortar flow amount that has been detect by the values with the base mortar flow amount detecting means, air mortar manufacturing apparatus according to claim 1, wherein the feedback control. The mixing cylinder has a fluid merging portion for joining the base mortar and bubbles, a fluid stirring and mixing portion for stirring and mixing the joined fluid, and the fluid merging portion includes a first delivery pipe for sending the base mortar, and a discharge port. Is inserted into the first delivery pipe coaxially with the first delivery pipe and delivers a bubble, and a fluid equalization having a conical surface provided to face the outlet of the second delivery pipe air mortar manufacturing apparatus according to claim 1 or 2, characterized in that it comprises a member. The air mortar manufacturing apparatus according to claim 3, further comprising means for adjusting a distance between the fluid equalizing member and a discharge port of the second delivery pipe.

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