JP4326261B2 - Material kneading equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a material kneading apparatus, and more particularly to a material kneading apparatus suitable for kneading a dry mix material such as dry mortar in a narrow space such as a tunnel and effectively performing various injection operations.
[0002]
[Prior art]
There has been proposed a material kneading apparatus capable of kneading and placing a large amount of dry mix material (particularly dry mortar) in a narrow space such as a tunnel (Patent Document 1). As shown in FIGS. 8 and 9, this kind of material kneading apparatus requires injection of a fixing material such as rock bolt A, leg reinforcement B, tip receiving C, mirror reinforcement D in the tunnel space TNL. It is used for work. In FIG. 8, the material mixing device MME mounted on the bed of the truck TRK is injecting the fixing material into the rock bolt worker A, and the front receiving work C is driven by the aerial work vehicle (drill jumbo) HWC. It shows the state.
[Patent Document 1]
Japanese Patent No. 3256532
[Problems to be solved by the invention]
In a large section tunnel, the number of rock bolts to be driven in one section, that is, the number of injections increases. Even if the number of rock bolts increases, it is necessary to perform the rock bolt installation work early and in a short time in order to prevent loosening of the ground and the progress of other tunnel construction work (Horishin, construction work) It is very important to combine with them.
Also, when the above-mentioned leg reinforcement work, tip receiving work, mirror reinforcement work, etc. are performed in parallel with the rock bolt work, the work of injecting the fixing material further increases, and if this work is not completed, the face E (Fig. (See 8).
[0004]
Therefore, it has been proposed to use two or more seed material kneading devices MME to shorten the time for the injection operation. Each material kneading device MME has a kneading pump 1, a material as shown in FIG. (Dry mix material) Since it is constituted by the tank 2 for storing a large amount of DM and the transfer means (screw pump) 3 for transferring the material DM from the tank to the pump, the narrow space near the face E is blocked accordingly. In addition, since the material is supplied to each tank 2 from the material supply bag MSB (see FIG. 11) suspended by a crane or the like, it is necessary to provide a space in the height direction. In the tunnel TNL, as shown in FIG. 11, a space in the height direction cannot be secured in the side wall portion (the height H1 in the center portion is only the height H2 if it is close to the side wall). Two or more such devices must be arranged, and the widths for maintenance are also required on both sides of each device, so that the widths W1 and W2 are required as a whole, which is a significant obstacle.
In view of the above, an object of the present invention is to provide a material kneading apparatus capable of shortening the time for pouring work in a small space.
[0005]
[Means for Solving the Problems]
The material kneading apparatus of the present invention includes a tank for storing the material, two kneading pumps arranged in one of the tanks for kneading and discharging the material, a transfer means for transferring the material from the tank to each kneading pump,
A switching means provided at the dropping port of the transfer means for selectively dropping the material to the hopper of each kneading pump, a material storage amount in the hopper of each kneading pump is detected, and if it exceeds the set amount, a switching signal A detection sensor that generates a pressure, and when the amount of material stored in the hopper of one kneading pump exceeds a set amount, the switching means is controlled so as to drop the material into the hopper of the other kneading pump, and both When the material storage amount in the hopper of the kneading pump becomes larger than the set amount, a control unit is provided for controlling to stop the material transfer by the transfer means, and the material is kneaded and discharged by each kneading pump. According to the present invention, it is possible to operate a plurality of kneading pumps in a small space and perform an efficient injection operation, thereby completing the injection operation required for one cross section early and in a short time. . Therefore, construction that does not loosen the natural ground becomes possible, and the safety of construction and the reliability of the entire structure are improved.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
(A) First Embodiment FIG. 1 is a cross-sectional view of a tunnel showing a state where a rock bolt injection operation is performed by the material kneading apparatus of the present invention, FIG. 2 is a side view of the material kneading apparatus of the present invention, and FIG. These are the top views of the material kneading apparatus of this invention, FIG. 4 is a front view of the material kneading apparatus of this invention.
The material kneading apparatus 10 of the first embodiment includes a tank 11 for storing material, one of the tanks, in the embodiment, two kneading pumps 12 and 13 disposed substantially in parallel in the front, and materials from the tank to the two pumps. A transfer means (screw pump) 14 for transferring is provided, and two drop ports 15a and 15b are provided at the front end side of the transfer means in two forks.
The kneading pumps 12 and 13 are composed of kneading pump portions 12a and 13a for kneading and discharging the dry mix material, material supply portions (hoppers) 12b and 13b for supplying the material to the kneading pump portion, and frames (frames) 12c and 13c. Has been. The kneading pump units 12a and 13a include a motor 61a, a rubber worm 61b, a mixing chamber 61c, a stirrer 61d, an eccentric worm pump 61e, a discharge port 61f, and the like. Supply materials to. When the material is charged, the rubber worm 61b feeds the material into the mixing chamber 61c, the stirrer 61d mixes the water and the material fed through the water valve in the mixing chamber, and the eccentric worm pump 61e The mixed material is pumped and delivered to the discharge port 61f for discharge. Therefore, by attaching the injection hose 61h to the discharge port 61f, the kneaded fixing material can be pumped to the fixing material placement position via the hose.
[0008]
There is a storage space 71 for 1 ton of dry mix material inside the funnel-shaped tank of the material storage tank 11, and the storage space is located on the side surface of the tank (in FIG. 1, it is located opposite to the paper surface). Therefore, it is visible from (not shown). A material receiving port 73 is provided at the top of the tank roof portion 72 so that a large amount of material packed in a bag can be put into the storage space 71 in the tank by opening the lid 74. A tank-shaped mesh 75 is fitted into the material receiving port 73 of the tank, and has a function of sieving a lump when there is a lump in the dry mix material charged from here. Two shutters 76 that can be opened and closed are provided side by side in the axial direction, and have a function of supplying material to the screw pump 14 from the tank storage space 71, stopping the material supply, and adjusting the material supply amount. is doing. The frame (frame) 77 holds the tank 11 and the screw pump 14 in a fixed manner.
[0009]
The screw pump 14 is provided so as to communicate with the storage space 71 of the tank 11 via the shutter 76, and is provided obliquely in the lateral direction so as to connect the tank 11 and the hoppers 12b and 13b. The screw pump 14 has a known configuration in which the dry mix material is transferred through the inside of the casing 82 by the rotational movement of the bladed shaft 81 inside. The casing 82 has a cylindrical shape, but is cut out at the bottom of the tank 11 so that the dry mix material can be received from the tank. The tank 11 and the casing 82 are integrated by welding or the like, and the shutter 76 can adjust the opening / closing amount by sliding the bottom of the tank 11. The screw pump 14 has a joint part 83 and is connected in series in a separable manner, and a support part 84 that supports the screw pump 14 is provided below the vicinity of the joint part. By separating the screw pump 14 from the joint portion 83, the portion clogged with the material (casing / shaft with blade) can be exchanged, the clogged place can be checked and cleaned. A motor 85 for driving a bladed shaft 81 is provided at the end of the screw pump 14. When the material storage amount in the hoppers 12b and 13b is larger than the set amount, the motor 85 stops rotating and stops driving the bladed shaft 81. To restart the motor, operate the start switch.
[0010]
A switching means 16 is provided at the branch portion of the two drop openings 15a and 15b, and the change means 16 transfers the material transferred by the screw pump 14 to one of the drop openings 15a and 15b (that is, whichever It can be selectively dropped into one kneading pump 12, 13). The switching means 16 in the illustrated example changes the material dropping direction by rotating the partition plate at the dropping port branching portion by operating the lever. The drop opening is manually switched in the manual type, but the partition plate can be controlled to rotate by the controller.
[0011]
In the controller control type, sensors 19a and 19b for detecting the height of the material in the hoppers 12b and 13b of the kneading pumps 12 and 13 are attached to the dropping ports 15a and 15b. In this controller control type, as shown in FIG. 5, when the controller 51 is ON and the material storage amount in the hopper (referred to as the hopper 12b) during material charging is not larger than the set amount, the sensor 19a detects the switching signal S1. Is sent to the controller 51. The monitoring determination unit 51a monitors whether or not the switching signals S1 and S2 are generated, and notifies the processor 51b when the generation of the switching signal S1 is detected. Thereby, the processor 51b of the controller 51 drives the switching means 16 via the switching control unit 51c to switch the dropping port, and drops the material to the hopper 13b of the other kneading pump 13. When both the hoppers 12b and 13b are full and the two sensors 19a and 19b are sending the switching signals S1 and S2, the processor 51b is connected to the drive motor 85 of the screw pump 14 via the motor drive control unit 51d. Control to stop rotation. Thereby, the screw pump 14 stops the transfer of the material.
[0012]
On one side surface of each kneading pump 12 and 13, switch boxes 20 and 21 in which electric parts are stored are provided. The two pumps 12 and 13 have switch boxes 20 and 21 as shown in FIG. As shown in FIG. 1, the width W in the crossing direction of the tunnel required for the material kneading apparatus is set so as to prevent the operation switch attached to the surface of the kneading device from being hidden. , 13 is the width of the two units in contact with each other without any gaps, and the width becomes narrower.
In the embodiment, the capacity of the tank 11 of the material kneading apparatus 10 is about 1000 liters or 500 liters, and the hopper capacity of the kneading pumps 12 and 13 is about 50 liters.
According to the material kneading apparatus, as shown in FIG. 1, two kneading pumps can be operated simultaneously to perform the injection operation.
[0013]
In carrying out the operation, first, the motor 85 of the screw pump 14 is driven to send dry mix materials such as dry mortar from the tank 11 to the hoppers 12b and 13b of the two kneading pumps 12 and 13, respectively. When the water valve is opened with the material in the hoppers 12b and 13b, the motor 61a is started and the kneading pump parts 12a and 13a are driven, the materials are kneaded and discharged at a predetermined pressure. Since the discharge status of the two kneading pumps 12 and 13 changes sequentially according to the progress of work, the remaining amount of material in each hopper is always different. When the switching means 16 is operated manually, the hopper remaining amount of each kneading pump 12, 13 is visually checked, the switching means 16 is operated according to the situation, and either of the materials transferred by the screw pump 14 is operated. The material is dropped into the material kneaders 12 and 13, or the drive motor 85 of the screw pump 14 is stopped to stop the material transfer. During the pouring operation, the two kneading pumps 12 and 13 are arranged so as to be shifted back and forth so that the operation switches do not overlap with each other, so that the switch operation can be performed in a small space.
[0014]
In addition, when the controller 51 (see FIG. 5) is used at the time of operation, the materials 19a and 19b attached to the two drop ports 15a and 15b collect materials up to the mouths of the hoppers 12b and 13b of the kneading pump, respectively. When the amount of material stored in the hopper is larger than the set amount, the sensors 19a and 19b send a switching signal to the monitoring determination unit 51a. As a result, the processor 51b drives the switching means 16 via the switching control unit 51d to drop the material on the other kneading pump. When the two sensors 19a and 19b are sending the switching signals S1 and S2, the processor 51b stops the drive motor 85 of the screw pump 14 via the motor drive control unit 51d. In addition, in order to stop the automatic dropping of the material to the kneading pump, the dropping stop is input by the external changeover switch 31 (see FIG. 5) of the switch box. In response to the drop stop input, the processor 51b controls the motor drive controller 51d to stop the drive motor 85 of the screw pump.
By the above control, the screw pump 14 of the material kneading apparatus continuously supplies the material to the two kneading pumps 12 and 13 without stopping the driving as much as possible, so that the operation efficiency of the machine is good.
[0015]
Since the capacity of the tank 11 is sufficiently larger than the capacity of the two hoppers 12b and 13b, regardless of the operation status of the kneading pumps 12 and 13, at any time when the amount of material in the tank 11 has decreased, Material replenishment can be performed. For material replenishment, open the lid 74 of the tank 11 and set the material supply bag containing the material containing 1 ton or 0.5 ton above it by hanging it with a crane, and place a material loading jig (not shown) on the tank. Place the bag on it and drop the material. Therefore, a working radius for replenishing the material is required, but the width on the left and right sides of the tank required for this purpose is about the width W where two kneading pumps are arranged.
According to the first embodiment, two kneading pumps 12 and 13 are operated in a small space, and an efficient injection operation is performed, thereby completing the required injection operation in one section early and in a short time. It becomes possible. Therefore, construction that does not loosen the natural ground becomes possible, and the safety of construction and the reliability of the entire structure are improved.
[0016]
(B) Second Embodiment FIG. 6 is a plan view showing another embodiment of the material kneading apparatus of the present invention, FIG. 7 is a partial schematic side view, and the same parts as those in the first embodiment are denoted by the same reference numerals. It is attached.
The material kneading apparatus 100 of the second embodiment performs injection by arranging two kneading pumps 12 and 13 in tandem in the front-rear direction (screw pump direction). According to the second embodiment, a screw pump 14 that is slightly longer than the first embodiment is used, and material dropping ports 15a and 15b are provided at two positions before and after the screw pump 14, and either one of the two dropping ports is connected. On one side, switching means 16 for dropping the material is provided. As in the previous example, in the case of manual operation, the switching means moves one of the partition plates back and forth by moving a lever to open one of the drop openings. The switching control by the controller is the same as in the first embodiment.
According to the second embodiment, the space necessary for operating the two kneading pumps 12 and 13 extends only in the front-rear direction, and it is not necessary to take a width in the cross-sectional direction. In addition, since the left and right sides of the kneading pumps 12 and 13 are completely open, not only the kneading pump can be easily driven and stopped, but also the maintenance thereof is facilitated.
As described above, the embodiment is an example in which two kneading pumps are arranged. However, the present invention is not limited to two, but can be applied to a case where three or more kneading pumps are arranged.
[0017]
【The invention's effect】
As described above, according to the present invention, it is possible to operate two kneading pumps in a small space and perform an efficient injection work, thereby completing the required injection work in one section early and in a short time. Become. Therefore, construction that does not loosen the natural ground becomes possible, and the safety of construction and the reliability of the entire structure are improved.
In addition, according to the present invention, the space necessary for operating the material kneading apparatus by arranging a plurality of kneading pumps in tandem extends in the front-rear direction, and it is not necessary to take a width in the cross-sectional direction. Further, since the left and right sides of each kneading pump are completely open, not only the kneading pump can be easily driven and stopped, but also its maintenance is facilitated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a tunnel showing a state where a rock bolt injecting operation is performed by a material kneading apparatus of the present invention.
FIG. 2 is a side view of the material kneading apparatus of the present invention.
FIG. 3 is a plan view of the material kneading apparatus of the present invention.
FIG. 4 is a front view of the material kneading apparatus of the present invention.
FIG. 5 is a configuration diagram of a control system.
FIG. 6 is a plan view of a material kneading apparatus according to a second embodiment.
FIG. 7 is a partial schematic side view of the material kneading apparatus of the second embodiment.
FIG. 8 is an operation explanatory diagram that requires injection of a fixing material.
FIG. 9 is another explanatory diagram of an operation that requires injection of a fixing material.
FIG. 10 is an explanatory diagram when working with a conventional material kneading apparatus.
FIG. 11 is an explanatory diagram when a material is supplied to a tank in the case where a plurality of conventional material kneading apparatuses are used.
[Explanation of symbols]
10 Material kneader
11 tanks
12, 13 Kneading pump
14 Transfer means (screw pump)
15a, 15b Drop port
16 Switching means
19a, 19b sensor
20,21 Switch box

Claims (1)

Tanks for storing materials,
Two kneading pumps arranged in one of the tanks to knead and discharge the material,
Transfer means for transferring material from the tank to each kneading pump;
A switching means that is provided at the dropping port of the transfer means and selectively drops the material to the hopper of each kneading pump;
A detection sensor that detects the amount of material stored in the hopper of each kneading pump and generates a switching signal if the amount exceeds the set amount,
When the amount of material stored in the hopper of one kneading pump exceeds the set amount, the switching means is controlled so as to drop the material into the hopper of the other kneading pump, and the hoppers of both kneading pumps A control unit that controls to stop the material transfer by the transfer means when the material storage amount of the
A material kneading apparatus for kneading and discharging the material by each kneading pump.

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