JPH0443198B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an explosive loading device for loading explosives into blast holes drilled in bedrock, and in particular for blasting ammonium nitrate explosives by accurately measuring a certain amount. This invention relates to an explosive loading device that can be loaded into a hole.

<Conventional technology> Conventionally, when loading ammonium nitrate explosives into blast holes in rock, a loading tube is connected to the bottom of a storage tank containing the ammonium nitrate explosives via an on-off valve, and the ammonium nitrate explosives are injected with compressed air. The predetermined amount was loaded by the operator opening and closing the on-off valve while moving the container.

<Problems to be Solved by the Invention> However, in the conventional loading method described above, the loading amount of ammonium nitrate explosive depends on the opening/closing time of the opening/closing valve based on the operator's intuition based on experience, etc. It was impossible to load the required amount of explosives. Further, the loading operation requires at least two people: one to operate the loading tube and one to operate the on-off valve.

The applicant has also proposed a device that uses the flow of compressed air to load a certain amount of explosives into a blast hole, but if the pipes through which the compressed air flows are not properly placed or connected, the explosives will This may cause backflow and make it unusable.

<Means for solving the problems> The present invention solves the above-mentioned conventional problems, and can be used in all cases regardless of the size of the blast hole or the type of normal hole or water hole. In addition, it provides an explosive loading device that can be operated by a single worker and prevents explosives from flowing back.The ammonium nitrate explosive stored in the storage tank is perforated through the loading tube using compressed air. An explosive loading device for loading into a blast hole, comprising a quantitative supply mechanism provided at the bottom of a storage tank, and a delivery pipe extending from the quantitative supply mechanism and having a loading tube connected to its tip, the quantitative supply mechanism described above. A rotor having a metering hole formed in the radial direction and a discharge air groove facing the delivery hole that communicates with the delivery pipe is rotatably housed inside the outer cylinder of the cylinder, and the rotor is rotatably housed in the outer cylinder. The exhaust air pipe and the delivery pipe can be connected via the exhaust air branch pipe and the exhaust air groove that connect the base of the exhaust air pipe to the outer cylinder near the delivery hole.

<Example> Examples of the present invention will be described below based on the drawings.

FIG. 1 is an overall schematic perspective view showing an example of the explosive loading device of the present invention, in which a cylindrical portion 1 and a funnel-shaped portion 2 are shown.
A granular explosive is stored inside a storage tank 3 consisting of a plurality of nuts 6... ... is made into a fixed state and the inside of the storage tank 3 is sealed. A compressed air supply pipe 8 having a pressure controller 7 in the middle is connected above the storage tank 3, and the inside of the storage tank 3 is pressurized by the compressed air supplied from the supply pipe 8.

On the other hand, a fixed quantity supply mechanism 9 for explosives is provided at the lower part of the storage tank 3, and this fixed quantity supply mechanism 9 is operated by a motor 10 provided at the rear.

The supply pipe 8 is branched in the middle and connected to an air control box 11, and the distal end of a discharge air pipe 12 extending from the control box 11 is connected to one side of the quantitative supply mechanism 9. Then, the base end of the delivery pipe 13 is connected to the other side of the quantitative supply mechanism 9, and the delivery pipe 1
Connect the explosive loading tube 14 to the tip of 3.

Two drive pipes 15 and 16 extending from the control box 11 are connected to the motor 10 described above, and both drive pipes 15 and 16 can provide controlled rotational drive to the motor 10.

Further, an operation tube 17 is connected to the control box 11, and an operation box 18 is connected to the tip of the operation tube 17.
and an operation button 19 provided in the operation box 18...
By operating the control box 11, the motor 10 can be driven or compressed air can be supplied to the exhaust air pipe 12.

2 to 4 are cross-sectional views showing the quantitative supply mechanism 9, which includes a sealed outer cylinder 20.
and an inner cylinder 2 fixedly provided on the inner periphery of this outer cylinder 20.
1 and a rotor 22 which is rotatably provided in close contact with the inner surface of an inner cylinder 21, and the rotor 22 is formed with a measuring hole 23 passing through it in the radial direction.
A discharge air groove 24 is formed in a part of the outer peripheral surface of the rotor 22 so as to face the delivery pipe 13.

The front and rear rotation center shafts 25 protruding from the center of the rotor 22 are individually supported by bearings 26, and one rotation center shaft 25 is connected to the motor 1 as described above.
0 drive shafts are integrally connected by a key. Therefore, when the motor 10 is driven, the rotor 22 is also driven to rotate.

As the motor 10 described above, a hydraulic motor, a pneumatic 90° rotation rotary actuator, or the like can be used.

In addition, there is almost no air leakage between the inner circumferential surface of the inner cylinder 21 and the outer circumferential surface of the rotor 22, and the frictional resistance is small, allowing the rotor 22 to rotate easily, and furthermore, even in dry conditions, wear resistance is low. It is molded using a special composite material such as Teflon that contains a small amount of glass fiber.

The upper surface of the fixed quantity supply mechanism 9 is provided with an inflow hole 2 for explosives that communicates with a discharge hole formed at the lower end of the storage tank 3.
7, and an air inlet hole 28 to which the above-mentioned exhaust air pipe 12 is connected to one side of the arcuate surface of the quantitative supply mechanism 9.
An air and explosive delivery hole 29 to which the delivery pipe 13 is connected is provided on the other side.

Further, one end of the exhaust air branch pipe 30 is connected to the middle of the above-mentioned delivery hole 29, that is, the base end of the exhaust air pipe 12, and the other side of this exhaust air branch pipe 30 is connected to the outer cylinder near the delivery hole 28. Air inflow hole 31 provided in 20
Connect to.

The above-mentioned exhaust air groove 24 is located on the outer circumferential surface of the rotor 22 at a position that does not contact the metering hole 23, and has a length that at least communicates the delivery hole 29 and the air inflow hole 31. If the metering hole 23 is oriented vertically and communicates with the inflow hole 27 of the storage tank 3 as shown in FIG.
4 connects the delivery hole 29 and the discharge air hole 31, so the discharge air pipe 12 and the delivery pipe 13 are substantially in communication. Further, when the rotor 22 rotates and the metering hole 23 is positioned laterally, and the inlet hole 28 and the outlet hole 29 are in communication, the exhaust air groove 24 is formed on the inner surface of the inner cylinder 21 as shown in FIG. Because it is blocked by
The air inflow hole 31 is closed.

On the other hand, as shown in FIG. 5, two limit bubbles 32 are attached to the outer surface of the quantitative supply mechanism 9.
Each limit bubble 32 faces a cam piece 33 fixed to one rotation center shaft 25, and each limit bubble 3
A second operating circuit 34 is connected to the control box 11 and a counting mechanism (not shown).

The explosive loading device of the present invention has the above-described configuration, and when in use, the granular explosive is stored inside the storage tank 3, and the lid material 5 is attached and locked with the nut 6. Seal it tightly. Then, by adjusting the pressure controller 7, compressed air from the supply pipe 8 is supplied into the storage tank 3 to pressurize it.

Next, the operation button 19 of the operation box 18 is operated to drive the motor 10 by the sequence control circuit of the control box 11, and the rotor 22 is rotated and stopped at a position where the metering hole 23 and the inflow hole 27 coincide (second figure). In this state, the granular explosive in the storage tank 3 is pushed into the metering hole 23, so that a certain amount of explosive is filled into the metering hole 23. Furthermore, even if compressed air is supplied to the exhaust air pipe 12, the inlet hole 2
8 is closed by the outer peripheral surface of the rotor 22,
This compressed air only leaves the discharge air branch 30 through the discharge air groove 24 and out of the delivery pipe 13 .

Next, by operating the operation button 19 of the operation box 18, the sequence circuit of the control box 11 drives the motor 10, rotates the rotor 22, and controls the metering hole 23.
When it stops with the inlet hole 28 and the outlet hole 29 communicating with each other (Fig. 3), the air supplied from the exhaust air pipe 12 flows into the metering hole 23 from the inlet hole 28, and the air inside the metering hole 23 is stopped. Explosives filled in the outlet hole 2
9 into the delivery pipe 13. Measuring hole 2
When all the explosives in 3 are supplied into the delivery pipe 13, the rotor 22 is rotated by the motor 10 to close the inlet hole 28 as shown in FIG. Air branch pipe 3
0 and the delivery pipe 13 communicate with each other. Therefore, the air in the exhaust air pipe 12 is supplied from the exhaust air branch pipe 30 through the exhaust air groove 24 into the delivery pipe 13,
This air causes the explosive in the delivery tube 13 to be transferred to the loading tube 14.
will be pumped to.

Therefore, if the tip of the loading tube 14 is inserted in advance into a blast hole in the rock, a fixed amount of explosives measured by the metering hole 23 of the rotor 22 will be loaded into the blast hole.

In the above-described operation, the internal pressure of the storage tank 3 by the supply pipe 8 is made slightly higher than the pressure of the compressed air in the discharge air pipe 12. If the number of times the explosives are loaded is set in advance on a counter provided inside the control box 11, the sequence circuit can be used to automatically stop the explosives after they have been loaded a predetermined number of times. Quantitative loading is possible. Furthermore, by setting the counter again and starting the loading operation, it is possible to automatically load explosives suitable for each blast hole in sequence.

Although the present invention has been described above with reference to the embodiments shown in the drawings, the present invention is not limited to the above-described embodiments, and can be implemented in any manner as long as the structure described in the claims is not changed.

<Effects of the Invention> In summary, according to the present invention, a fixed quantity supply mechanism is provided at the lower part of the storage tank, a delivery pipe having a loading tube connected to the tip thereof is provided in the fixed quantity supply mechanism, and a diameter is provided inside the fixed quantity supply mechanism. A rotor is rotatably housed in which a metering hole is formed in the direction and a discharge air groove facing the delivery hole communicating with the delivery pipe is formed in a part of the outer peripheral surface, and the upper part of the quantitative supply mechanism is placed in the lower part of the storage tank. In addition, the exhaust air pipe and the delivery pipe can be connected via the exhaust air branch pipe and the exhaust air groove, which connects the base of the exhaust air pipe to the outer cylinder near the delivery hole. Therefore, the following effects can be achieved.

(1) In the explosive loading device of the present invention, the rotor 22 of the quantitative supply mechanism 9 is stopped so that the delivery hole 29 is closed, and the discharge air branch pipe 30 and the discharge air groove 24 are closed.
When compressed air is supplied into the delivery pipe 13, it is ejected from the tip of the loading pipe 14, so water or spring water remaining in the blast hole can be easily removed. Moreover,
Since the air pipe is not connected to the delivery pipe 13 through which the explosives flow, the explosives will not flow back into any pipe, and the pipes will not be blocked by the backflow of the explosives, and the work will not be possible if the pipes become inoperable during use. It is possible to reliably prevent a situation where the event is canceled.

(2) The explosive loading device of the present invention has a control box 11.
By combining the following sequence circuits, it is possible to automatically and accurately load a fixed amount of explosives into each blast hole.

(3) When the operation button circuit is drawn out from the sequence circuit of the control box 11, the operation tube 17 is extended, and the operation button circuit is installed in the operation box 18 at the tip, the explosive loading operator can operate the loading tube 14. The operation of the operation button 19 of the box 18 can be carried out at the same time, and the loading operation can be carried out by one operator instead of the conventional two operators.

(4) Conventional explosive loading methods relied on the operator's intuition, making it impossible to adjust the amount of explosives required for each blast hole, but according to the present invention, Due to the interlocking control operation between the tank 3 and the control box 11, it is possible to load an appropriate amount of explosives into each blast hole.

Due to the above-mentioned effects, the explosive loading device of the present invention has high practical value and can be used effectively.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall perspective view, FIG. 2 is a longitudinal cross-sectional view of the quantitative feeding mechanism in one operating state, and FIG. 3 is a longitudinal sectional view of the quantitative feeding mechanism in another operating state. FIG. 4 is a longitudinal sectional view of the quantitative supply mechanism in another direction, and FIG. 5 is a front view of the quantitative supply mechanism. 3 is a storage tank, 9 is a quantitative supply mechanism, 10 is a motor, 11 is a control box, 12 is a discharge air pipe, 1
3 is a delivery pipe, 14 is a loading pipe, 22 is a rotor, 23
24 is a metering hole, 24 is an exhaust air groove, and 30 is an exhaust air branch pipe.

Claims (1)

[Claims] 1. In an explosive loading device that loads ammonium nitrate oil explosive stored in a storage tank into a blast hole drilled through a loading tube using compressed air, a fixed quantity supply mechanism provided at the lower part of the storage tank and a fixed quantity supply mechanism from the fixed quantity supply mechanism are used. The metering hole is formed in the radial direction inside the outer cylinder of the metered supply mechanism, and the exhaust air is provided facing the delivery hole communicating with the delivery pipe. A discharge air branch rotatably accommodates a rotor having a groove formed in a part of its outer circumferential surface, and connects the discharge air pipe and delivery pipe of the quantitative supply mechanism from the base of the discharge air pipe to the outer cylinder near the delivery hole. An explosive loading device characterized in that it is connectable via a pipe and the discharge air groove.