JPS5936291Y2 - Two-tank concrete spraying machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a two-tank concrete spraying machine.

Various types of machines are conventionally known for spraying concrete and mortar, and one of them is the upper and lower two-tank spraying machine proposed by the present inventor.

This spraying machine is constructed by arranging pressure-resistant containers in upper and lower stages, passing horizontal shafts with stirring blades through each pressure-resistant container, and driving these horizontal shafts synchronously with a diesel engine, pulleys, and an endless belt. Materials are kneaded in a pressure-resistant container, then the pressure in the upper and lower pressure-resistant containers is equalized, and the materials are dropped into the lower pressure-resistant container.The material is then force-fed from the discharge port of the lower pressure-resistant container to the transfer hose, while the upper pressure-resistant container is kneaded. The process of kneading the next material in a container is repeated.

According to the machine, high-quality concrete and mortar can be made by simply putting materials such as cement, sand, and gravel into a single-stage pressure-resistant container, but the pressure-resistant container, which is a mixer, has an internal pressure of 5 kg/100 lbs. cn (As mentioned above, it is operated at a fairly high pressure and the internal situation cannot be determined, so switching the material supply from the upper pressure container to the lower pressure container is a blind operation. Even if the material in the container is exhausted, the material is not supplied from the upper pressure container, and continuous spraying cannot be performed due to the material being interrupted, or conversely, even though there is a considerable amount of material remaining in the lower pressure container. A large amount of material is supplied, which causes various problems such as large fluctuations in the discharge amount, overloading of the main shaft in the lower pressure container, and the inability to open and close the gate valve between the lower pressure containers. There was a problem that could easily occur.

In addition, since the switching timing must be determined solely by intuition, a considerable amount of skill is required for operation, which poses a problem in that it is not easy to use.

The present invention solves the problems of the two-tank spraying machine described above, fully demonstrates the rapid cross-talk function by using a pressure vessel and a stirring blade, and also solves the problem of cross-talk of the two-tank pressure vessels and switching between delivery. It is designed to be easy to perform without requiring any skill, and to ensure stable and continuous spraying at all times.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Figures 1 and 2 show a two-tank type concrete spraying machine according to the present invention, and 1 and 1' are horizontal cylindrical pressure vessels, which are at approximately the same height level as shown in the figure. Hoppers 3 and 3' are fixed to the base 2 so as to be parallel to each other, and have hoppers 3 and 3' at the top for charging materials, and discharge ports 4 and 4' at the bottom at positions displaced from the vertical line of the hoppers 3 and 3'. We are prepared.

Below the horizontal cylindrical pressure vessels 1, 1', a common delivery tube 6 with a screw blade 5 inserted therein is disposed, and the discharge ports 4, 4' communicate with this common delivery front 6, respectively. between the discharge port 4°4' and the common delivery cylinder 6, and between the hoppers 3, 3' and the pressure vessels 1, 1'.
On-off valves each operated by a fluid pressure cylinder7. 7'
1.8. 8' allows for communication or non-communication.

In addition to the embodiment shown, the common delivery tube 6 includes two cylindrical portions each having a built-in screw blade immediately below the discharge ports 4, 4' of each horizontal cylindrical pressure vessel 1, 1'; It may be of a known type that has an extending convergence part of the cylindrical parts and connects the two cylindrical parts alternately with the hose using a switching device.

The common delivery tube in the present invention includes this type.

On the other hand, a main shaft 9, 9' is inserted through the center of each of the horizontal cylindrical pressure vessels 1, 1' via a bearing, and a stirring blade 1° having a feeding function is attached to the main shaft portion inside the container. It is being

The stirring blade 1o having the above-mentioned characteristics is intercepted by a group of inclined blades tilted at a predetermined angle with respect to the spindle axis and the rotation direction of the spindle, and a part of the blades is attached to a spindle portion directly corresponding to the discharge port position. .

Each of the main shafts 9, 9' is connected to the output shaft of a motor 11.11' with a reduction gear provided on the base -L, and is driven independently by the motor 11.11'. At the same time, the drive system of each motor 11, 11' continuously detects and measures fluctuations in the motor output due to fluctuations in the load applied to the main shafts 9, 9' via stirring blades 1o. , 1' is connected to a load measuring device 12° 12' for switching between stirring and feeding.

An electric motor or a fluid pressure motor can be used as the motor 11.11', and an ammeter, a pressure gauge, etc. can be used as the load measuring device 12.12'.

The load measuring device g312.12' may be attached to a control panel on the base, and the horizontal cylindrical pressure volume W7L1' may be manually switched by visually observing the measurement results. 12' is preferably connected to at least the discharge port opening/closing valves 8, 8' of the horizontal cylindrical pressure vessel 1.1' to provide an automatic switching operation system under automatic control.

FIG. 3 shows an example of this automatic control system, in which each load measuring device 12, 12' is connected to a program control circuit 14 via a selection switching circuit 13, and this program control circuit 14 is connected to each horizontal cylinder. Pressure vessels 1, 1' inlet opening/closing valve 7.7', discharge opening opening/closing valve 8, 8', air supply valve 15.1
5' Exhaust valve 16, 16', etc. is connected to the operating system via a timer, etc., and the respective horizontal cylindrical pressure vessels 1, 1
′ are automatically switched and activated in sequence.

Although not shown, a material supply conveyor is arranged above the hopper.

Preferably, this material supply conveyor is also automatically controlled by the circuit.

In other drawings, 2o is a tapered ring nozzle attached to the tip of the common delivery tube 6, and a part of it is provided with a blowing part 21 for pressurized air, and the other part is filled with water or quick condensation. An injection part 21' for agent-mixed water is provided.

22 is a hose, and 23 is a spray nozzle.

In the two-tank spraying method according to the present invention, the machine consists of the above-mentioned operations, so when performing wet spraying, the composition of the material to be sprayed, for example, cement I.
For sand, gravel, water and mortar, use cement I.
, sand, water, and several types of furnace materials and binder are put into the hoppers 3 and 3', and the on-off valve 7. 7', 8.
8' is closed, and the air supply valves 15 and 15' are opened to bring the inside of the pressure vessel to a predetermined pressure, and each motor It 11' is driven to rotate the main shafts 9, 9'. The materials charged into the horizontal cylindrical pressure vessels 1, 1' are rapidly forcedly kneaded and sent in the axial direction of the horizontal cylindrical pressure vessels 1, 1'.

Then, when an arbitrary horizontal cylindrical pressure vessel 1 is selected by the selection switching circuit 13, a signal is sent to the program control circuit 14 and the discharge L1 on-off valve 8 is opened, whereby the kneaded material is sequentially transferred to the discharge U4. It flows down and is supplied to the common delivery cylinder 6, where it is forwarded by the screw blade 5 and begins to be fed under pressure from the ring nozzle 20 to the hose 22.

As this process continues, the material in the horizontal cylindrical pressure vessel 1 gradually decreases, and as a result, the material in the horizontal cylindrical pressure vessel 1 is transferred to the main shaft 9
The rotational load applied to the motor also fluctuates, and this is automatically detected by the load measuring device 12.

Therefore, it is possible to reliably grasp the amount of material in the pressure vessel from the outside, and switching to another horizontal cylindrical pressure vessel 1' can be performed smoothly and in a timely manner.

Then, the load measuring device 12 sequentially detects the material reduction process, and when the amount of material remaining in the container reaches a certain level, a signal is sent to the program control circuit 14 communicating with the load measuring device 12. Automatic switching control of the pressure vessels 1, 1' is carried out.

That is, according to the program settings, the discharge opening/closing valve 8 of the horizontal cylindrical pressure vessel 1, which had been in the discharging process, is closed, and the discharge opening/closing valve 8' of the horizontal cylindrical pressure vessel 1, which had been in the stirring process, is closed. is opened, and as a result, the material in the horizontal cylindrical pressure vessel 1' begins to be sprayed from the common delivery tube 6 to the nozzle 23.

At this time, the load measuring device is also switched to the pressure vessel in the discharge process.

On the other hand, in the horizontal cylindrical pressure vessel 1, the opening of the exhaust valve 16, the opening of the input opening/closing valve 7, and the operation of the supply conveyor are performed in sequence, whereby the next material is accommodated in the horizontal cylindrical pressure vessel. Subsequently, the inlet opening/closing valve 7 and the exhaust valve 16 are closed, and the air supply valve 15 is opened to establish a predetermined internal pressure again, and stirring and mixing is performed.

In this way, while data is being produced in one pressure vessel 1, the other pressure vessel 1' is discharged, and at a certain time, the pressure vessel is switched again by the signal from the load measuring device 12', and from then on, the same pressure vessel 1' is used. Continuous spraying is performed by repeating the operation.

Note that water may be supplied from the hoppers 3, 3', or all or part of the water may be supplied from the ring nozzle 20, mixed with the material and sprayed during conveyance with a hose.

This method is suitable when using an accelerating agent.

That is, since the granular quick-setting agent is charged into the pressure vessel together with the material from the hoppers 3, 3' and mixed, it is possible to transport the material without causing the material to solidify due to the quick-setting agent.

According to the present invention described above, several horizontal cylindrical pressure vessels 1, 1' each having a hopper on the upper side are arranged in parallel,
The discharge ports 4, 4' of the horizontal cylindrical pressure vessels 1, 1' are connected to various parts of the common delivery cylinder 6, and a main shaft 9.9' having a stirring blade 10 is provided in each horizontal cylindrical pressure vessel. Moreover, these main shafts are driven by external motors IL 11', and each motor IL 11' is equipped with a load measuring device 12. for automatically detecting the amount of material in the horizontal cylindrical pressure vessel.
12', and the load measuring device 12.12'
, the input on-off valves 7, 7' of each horizontal cylindrical pressure vessel 1, 1'
, discharge port opening/closing valve 8, 8', supply/exhaust valve 15.16.15
', 16', etc. are connected via the control circuit 14, and each horizontal cylindrical pressure vessel 1°1' is switched and operated according to a fixed program, so it is not only possible to simply grasp the remaining amount of materials. , while fully demonstrating the effect of forced cross-contact and continuous feeding using the pressure vessel, stirring blades, and shared delivery cylinder, and two horizontal cylindrical pressure vessels 1,
1' allows for smooth continuous spraying,
Appropriate continuous spraying can be performed without material interruptions or variations in discharge amount, and there are no operational problems due to overload, and the operation based on intuition can be eliminated, so it is very easy to use and does not require any skill. Excellent effects such as improved usability can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing an embodiment of the two-tank type concrete spraying machine according to the present invention, Fig. 2 is a longitudinal sectional side view thereof, and Fig. 3 is a pressure vessel automatic switching according to the present invention. FIG. 2 is a block diagram illustrating an example of a control method. 1.1'...Horizontal pressure vessel, 3,3'...
...Hopper, 4,4'...Discharge port, 6...
・・Common delivery tube, 9゜9′・・・・Main shaft, 1o・・
... Stirring blade, 11,7. 7'...Inlet opening/closing valve, 8,8'...Discharge [] opening/closing valve, 9゜9'...Main shaft, 1o...Stirring blade , I
L 11'...Motor, 12.12'...
...Load measuring device, 14...Controller, 15, 15
'...Intake valve, 16.16'...Exhaust valve.

Claims (1)

[Scope of utility model registration request] Two horizontal cylindrical pressure vessels 1, 1 each equipped with a hopper on the upper side
' are arranged in parallel, and the discharge ports 4, 4' of these horizontal cylindrical pressure vessels 1.1' are connected to the common delivery cylinder 6, and each horizontal cylindrical pressure vessel has a main shaft 9, which has a stirring blade. 9' is provided so that the main shafts 9, 9' are driven by external motors 11, 11', and each motor IL 11' has a
A load measuring device 11, 12' for automatically detecting the amount of material in the horizontal cylindrical pressure vessel is provided, and the load measuring device 1
2.12', the inlet opening/closing valve 77 of each horizontal cylindrical pressure vessel 1, 1', the two outlet opening/closing valves 8, 8', the supply/exhaust valve 15.
16. The two-tank type concrete spraying system is characterized in that it is connected to the operating system for 15', 16, etc. via a control circuit 14, and the horizontal cylindrical pressure vessels 11' are switched and operated according to a fixed program. Machine.