JPH0535216U - Mini concrete plant - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the need for a dedicated plant operator for the production of ready-mixed concrete, reduce personnel, and improve the environment at the work site. [Structure] A mixer 3 having a substantially sealed structure, which communicates with a silo 1 and a water tank 2, is installed on a load cell 4, and an indicator 5 attached to the load cell 4 displays a measured value of raw materials put into the mixer. In addition, the raw material is put into the mixer and stopped via the control panel 6 provided in the display unit 5, and the mixer 3 and the concrete pressure pump 7 are remotely controlled from the control panel. ..

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mini-concrete plant, and more specifically, to a so-called simple mobile mini-concrete plant in which raw concrete raw materials are weighed in a prescribed composition at a concrete pouring site and then kneaded to produce a raw concrete. ..

[0002]

[Prior art]

 Mini-concrete plants are highly convenient because they can produce ready-mixed concrete and immediately supply it to the driving place after it has been loaded and installed at, for example, a construction site or a ground improvement site. Such a mini-concrete plant is usually composed of a storage unit that receives and stores raw materials such as cement, water, and sand, a weighing unit that measures each raw material, a mixer that mixes the raw materials, and auxiliary equipment. It is generally installed in a vehicle so that it can be moved.

[0003]

[Problems to be solved by the device]

 However, the conventional mini-concrete plant has a relatively simple structure due to the restrictions on its use, which is a simple mobile system.For example, when pouring cement into bags into a mixer, mechanization is omitted due to manual work. It had been. In addition, human intervention was required in many areas, such as the operation management of the mixer and the control of the discharge rate of the ready-mixed fresh concrete from the mixer. Therefore, in the conventional mini-concrete plant, a dedicated operator was required for plant operation management in addition to a fresh concrete pouring operator. In addition, as described above, since the bag-filled cement is unpacked and put into the mixer, the cement powder is scattered and the surrounding environment is polluted. The present invention has been made in view of the above circumstances, and provides a mini-concrete plant capable of manufacturing ready-mixed concrete while reducing the labor by eliminating the need for a dedicated operator for plant operation and preventing pollution of the surrounding environment. The purpose is to do.

[0004]

[Means for Solving the Problems]

 The above object of the present invention is to measure at least a silo for storing cement powder, a water tank, a concrete mixer in communication with the silo and the water tank, and the weight of the cement powder and water supplied to the concrete mixer. A load cell, a concrete pump for sucking fresh concrete in the concrete mixer and pumping it to the driving point, an instruction for supplying the cement powder and water according to the measured value of the load cell, and the concrete mixer and the above The present invention is achieved by a mini-concrete plant characterized by comprising a control panel for remotely controlling the operation of a concrete pump and a generator for supplying electric power to each of the predetermined parts.

Further, the above object of the present invention is to provide at least a silo for storing cement powder, a water tank, a concrete mixer in communication with the silo and the water tank, and a weight of the cement powder and water supplied to the concrete mixer. Load cell, a concrete pump for sucking fresh concrete in the concrete mixer and pumping it to the driving point, and the cement powder and the above-mentioned cement powder depending on the measured value of the load cell and the preset value. A mini-conquer characterized by comprising a control device for controlling the amount of water supplied to the concrete mixer and for remotely controlling the operation of the concrete mixer and the concrete pressure pump, and a generator for supplying electric power to each of the predetermined parts. Achieved by a reed plant.

[0006]

[Action]

 Raw materials can be supplied to the concrete mixer by monitoring the measured value of the load cell and remotely controlling the supply valves of the silo and water tank from the control panel installed at a location remote from the plant. Further, since the concrete mixer and the concrete pumping pump can be remotely controlled from the control panel described above, the concrete driving operator can also function as a plant operator by operating the control panel installed near the driving point. it can. In addition, the control device is electrically connected to the load cell to automate the metering of raw materials by the load cell, and the concrete mixer and the concrete pressure pump can be automatically operated based on the command from the control device. Complete automation of the system can be achieved.

[0007]

【Example】

 An embodiment of a mini concrete plant of the present invention will be described below with reference to the drawings. In addition, in this example, a mini-concrete plant in the case of manufacturing milk cement by kneading cement powder and water will be described. Furthermore, in the present embodiment, a case will be described in which the milk cement produced in the above plant is mixed with the soil at the construction site and applied to the soil cement construction method suitable for improving soft ground, for example. FIG. 1 shows an embodiment of a mini-concrete plant of the present invention (hereinafter, simply referred to as a plant in this specification). This plant 20 includes a silo 1 for storing cement powder and a water tank for storing water. 2, a concrete mixer 3 in which the silo 1 and the water tank 2 communicate with each other, a load cell 4 on which the concrete mixer 3 is placed and the weight of raw materials supplied into the mixer is weighed, and a load cell 4 attached to the load cell 4. The indicator 5 that displays the measured value and is placed near the concrete pouring point, the control panel 6 that is placed near the concrete pouring point like the above-mentioned indicator 5 and the inside of the mixer. A concrete pressure-feeding pump 7 for sucking the produced milk cement and pressure-feeding it to the driving place, and a generator 8 for supplying electric power to predetermined portions are roughly configured.

[0008] To further describe each of the main parts, the silo 1 has a storage capacity of a maximum capacity of 3.5 tons, and drives a lower screw conveyor (not shown) provided in the main body to discharge cement powder. A motor 9 is provided. A submersible pump 10 is attached to the water tank 2, and the submersible pump 10 is capable of sending water in the water tank to the concrete mixer 3. The structure of the mixer 3 will be described in detail later, but a stirring blade 12 disposed inside is rotatably provided by a stirring motor 11 to knead the raw materials. The display 5 is attached to the load cell 4 and is also connected to the load cell 4 by a cable so as to digitally display the measured value at a position distant from the load cell 4. The control panel 6 is electrically connected to the motor 9 and the submersible pump 10 of the silo 1, and the stirring motor 11 and the concrete pressure pump 7 respectively, so that each of the above parts can be remotely controlled. It is configured to have a switch button. The control panel 6 is further provided with a power switch capable of remotely controlling the operation of the generator 8 and a weighing switch for instructing the start of weighing of the load cell 4. The broken line shown in the figure shows the control signal system.

The concrete mixer 3 will be further described with reference to FIG. 2. The mixer 3 has a substantially cylindrical sealing structure, and the bottom portion 3a is formed in a funnel shape that descends toward the center, and the center of the bottom portion is the outside. It is formed on a curved portion 3b having a substantially semicircular shape protruding in one direction. The hose 14 for discharging milk cement is arranged so that its tip is located in the curved portion 3b, and extends upward and is drawn out to the outside. The other end on the outer side of the hose 14 is connected to the concrete pressure pump 7. In the vicinity of the tip of the hose 14, a net 15 for dust collection is provided surrounding the hose and stretched so as to cover the curved portion 3b. This mesh 15 prevents existing solidified concrete lumps adhering to the inner wall of the mixer, for example, from falling due to vibration of mixer operation and being sucked by the concrete pumping pump 7 through the hose 14. There is. That is, the net 15 is provided for the purpose of preventing the deterioration of the quality of the product due to the discharge of the dust including the concrete lump from the concrete mixer and the failure due to the clogging of the concrete pressure pump 7.

FIG. 3 shows a construction machine used in the soil cement construction method to which this embodiment is applied. This construction machine is composed of a hydraulically driven universal excavator 30 as a drive body and a generator 40 attached to the excavator 30. The generator 40 has a slurry inlet 41 for the concrete pressure pump. 7 and the hose 42. Further, the forming machine 40 is configured to have a digging portion 44 having a slurry injection port 43 at the digging tip and a plurality of stirring blades 45 provided in the vicinity of the digging portion 44.

Next, an operation method of the mini-concrete plant of the present invention configured as described above and a construction procedure for making a pile pillar in the ground by the soil cement method will be described. When constructing the soil cement construction method, a concrete driving worker is first required to produce ready-mixed concrete before operating the hydraulically driven universal excavator 30. After confirming the empty state in the mixer 3 with the display 5, the driving operator first determines the amount of water to be supplied into the mixer from the control panel 6 to the measurement setting counter attached to the load cell 4. Set. Then, the switch button for the submersible pump arranged on the control panel 6 is operated to start the water supply to the mixer 3. When the submersible pump 10 is driven to carry out water supply, the load cell 4 sequentially measures the water supplied to the mixer, digitally displays the measured value on the display 5, and the water supply amount is set to be measured. An alarm will be issued when it enters the range set by the counter. The operator stops the operation of the submersible pump 10 after monitoring the display 5 and confirming the water supply amount by an alarm. Next, the operator changes the set value of the measurement setting counter of the load cell 4 and newly sets the addition value of the cement powder and water when a predetermined amount of cement powder is put into the mixer 3. After that, the motor 9 of the silo 1 is driven from the control panel 6 by the distance control, and the cement powder is put into the mixer 3. Through this series of operations, the load cell 4 measures and displays the added value of water and cement powder, and also issues an alarm when the added measured value falls within the set range. After confirming the displayed value and this alarm, the operator stops the operation of the motor 9 and stops the injection of cement powder. Next, the operator controls the stirring motor 11 of the mixer 3 so as to be remote from the control panel 6 and drives the stirring motor 11 for a predetermined time. By driving the stirring motor 11, water and cement powder are mixed in the mixer 3 to produce milk cement.

When the milk cement is produced, the operator then starts the operation of the concrete pressure pump 7 from the control panel 6 to discharge the milk cement through the hose 14 to the outside of the mixer. The discharged milk cement is pressure-fed by the concrete pressure pump 7 through the hose 42 to the slurry inlet 41 of the forming machine 40. When the ready-mixed concrete is produced and pumped as described above, the operator operates the hydraulically driven universal excavator 30, and the stirring shaft of the generator 40 attached to the excavator 30 is connected to a predetermined ground surface. After that, while the drive shaft is being rotated, the stirring blade 45 is used to perforate to a predetermined depth. Subsequently, the milk cement and the ground soil particles are stirred while discharging the milk cement from the slurry injection port 41 of the generator 40, and the generator 40 is pulled up from the ground while stirring. As a result, pile-shaped pile-shaped pillars are constructed underground by the soil cement method.

In the mini-concrete plant of the present invention, a series of ready-mixed concrete manufacturing processes including measurement of water and cement can be carried out by remote control. Can also serve as a dedicated operator for It should be noted that installing the control panel 6 in the cab of the excavator 30 can be easily considered.

FIG. 4 shows another embodiment of the present invention. In this embodiment, the mini-concrete plant 50 has the functions corresponding to the control panel and the display in the embodiment shown in FIG. 1 replaced by a control device 51 having a setting panel. The present embodiment is configured in the same manner as the previous embodiment with respect to other configurations, and therefore the same reference numerals are used for the other constituent elements and the description thereof is omitted. The load cell 4 is connected to the control device 51, and the measured value is input to the control device 51 via the setting panel. The control device 51 is configured to include a microcomputer and a ROM, and is configured to issue a drive command to the motor 9 and the submersible pump 10 of the syro 1 according to a program incorporated in advance. That is, when the type of ready-mixed concrete to be produced is selected from the setting panel and the production amount is set and input, the control device 51 determines whether the water and cement powder to be supplied to the mixer 3 from the map stored in the ROM is appropriate. The supply amount is calculated and a drive command is issued to the motor 9 and the submersible pump 10 of the silo 1. On the other hand, the load cell 4 measures the added weight of the water and cement powder supplied to the mixer 3 and returns the measured value to the control device 51, which controls the returned measured value and set input value. Is constantly compared, and when the two match, a stop command is issued to the motor 9 and the submersible pump 10 of the silo 1. When the automatic supply of the raw materials to the mixer 3 and the automatic weighing by the load cell 4 are completed, the control device 51 now issues a drive command to the stirring motor 11 to cause the raw materials to be kneaded. Further, the control device 51 issues a command to the concrete pumping pump 7 to discharge the raw concrete when the raw concrete is made according to the program.

As described above, the control device 51 is configured to collectively manage a series of green concrete manufacturing processes, and is provided so as to reduce the intervention of the driving operator and reduce the burden. Has been. Further, in this embodiment, since the water in the mixer and the cement powder are simultaneously supplied and the additional weight thereof is measured, the raw concrete production time is longer than that in the case where the raw materials are sequentially measured. Can be shortened. In each of the above-mentioned examples, only the case of mixing water and cement powder as raw materials was described, but in addition, an admixture for improving the fluidity and other properties of sand or concrete can be appropriately mixed. Is natural.

[0016]

[Effect of the device]

 As described above, according to the mini-concrete plant of the present invention, the display attached to the load cell for measuring the raw materials is monitored to remotely control the drive of the silo motor and the submersible pump from the control panel and the stirring motor. In addition, by specially controlling the operation of the concrete pressure pump from the control panel, and by placing the control panel near the concrete driving point and the driving operator operating the control panel, full-time operation of the plant is performed. The number of workers can be reduced by eliminating the need for an operator. In addition, since the cement powder is not charged into the mixer manually, the adverse effect on the human body due to the suction of the cement dust can be eliminated. In addition, the mixer has a sealed structure and the whole system is connected by hoses or pipes, so that contamination due to scattering of cement can be eliminated and the cleanliness of the work site can be improved, and at the same time the product can be manufactured during the manufacturing process. It is possible to preferably prevent dust and the like from entering the inside. Furthermore, the quality of the raw materials can be improved and uniform concrete can be produced by automatic supply and automatic weighing of raw materials. Furthermore, the configuration in which the entire system is managed collectively by the control device also prevents the occurrence of accidents such as damage to the rotor blades that occur when the plant is operated without injecting water into the mixer.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a mini-concrete plant of the present invention.

2 is a cross-sectional view of a mixer in the mini-concrete plant of FIG.

FIG. 3 is a diagram illustrating a hydraulically driven universal excavator having a construction machine, which implements a soil cement method applied to an embodiment of the present invention.

FIG. 4 is a schematic view showing another embodiment of the mini-concrete plant of the present invention.

[Explanation of symbols]

 1 silo 2 water tank 3 mixer 4 load cell 5 indicator 6 control panel 7 concrete pressure pump 8 generator 9 motor 10 submersible pump 11 stirring motor 12 stirring blade 20, 50 mini concrete plant 30 hydraulic drive universal excavator 40 generator 51 control apparatus

Claims (2)

[Scope of utility model registration request] 1. A silo for storing at least cement powder, a water tank, a concrete mixer in communication with the silo and the water tank, and a load cell for measuring the weight of the cement powder and water supplied to the concrete mixer.
A concrete pressure pump that sucks fresh concrete in the concrete mixer and pressure-feeds it to the driving place, and commands the supply of the cement powder and water according to the measured value of the load cell and operates the concrete mixer and the concrete pressure pump. A mini-concrete plant characterized by comprising a control panel for remotely controlling the above and a generator for supplying electric power to the respective predetermined parts. 2. A silo for storing at least cement powder, a water tank, a concrete mixer in communication with the silo and the water tank, and a load cell for weighing the cement powder and water supplied to the concrete mixer.
A concrete pressure pump that sucks fresh concrete in the concrete mixer and pressure-feeds it to the driving point, and the supply amount of the cement powder and water to the concrete mixer according to the measured value of the load cell and the preset value. A mini-concrete plant, comprising: a control device for controlling the operation of the concrete mixer and the concrete pressure pump, and a generator for supplying electric power to each of the predetermined parts.