JP2000097600A - Explosive filling machine with volume type measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an explosive filling machine, prominent in economical property as well as safety and equipped with a volume type measuring instrument, able of filling a given amount of explosive, which is based on a blasting theory, easily and surely into a multitude of vertical holes or horizontal holes without requiring any skill thereby permitting the achievement of the remarkable rationalization of a blasting work. SOLUTION: An explosive filling machine is constituted of a hopper 2, receiving explosive, a volume type measuring instrument 6, provided below the hopper 2 through a first opening and closing means 4, and a chute 12, provided below the volume type measuring instrument 6 through a second opening and closing means 11, while the volume type measuring instrument 6 is provided with volume changing means 7, 8, capable of regulating the internal volumes of the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosive loading machine used for filling explosives such as nitrite explosives in a perforated portion when performing blasting work in a mine or the like, and more particularly to the amount of explosives to be charged. The present invention relates to an explosive loading machine with a positive displacement meter, which can be adjusted arbitrarily.

[0002]

2. Description of the Related Art In general, blasting operations using explosives are performed in quarrying work in various mines such as limestone mines and various civil works such as tunnel works and dam constructions. These blasting operations are usually performed by drilling a large number of holes in the mine and the like using a rock drill and filling these holes with explosives. BACKGROUND ART Porous granular nitric acid explosives (AN-FO) which are excellent in safety and economy and have a large explosive power are widely used.

Conventionally, in such a blasting operation, as a method of filling a hole drilled in a mine or the like with a nitrite explosive, the above hole is a hole drilled downward which is used when performing open pit mining or the like (hereinafter, referred to as a hole). The following various methods are employed depending on the case where the hole is a vertical hole) and the case where the hole is a horizontally drilled hole (hereinafter abbreviated as a horizontal hole) used when performing tunnel construction or the like. I have.

[0004]

First, when charging a nitrite explosive into a pit, a method of pouring the nitrite explosive directly through a funnel provided at the opening of the pit, or a method of charging the nitrite explosive once stored in a hopper, is used. A method of extracting with a screw conveyor or the like, pouring it into the above-mentioned pit through a loading hose attached to the tip thereof, and filling the hole is adopted.

On the other hand, when the side holes are filled with the nitrite explosive, since the casting by gravity cannot be performed, a pressurized tank-type pressure feeding and loading machine is usually used to pneumatically charge the nitrite explosive stored in the tank. Pumped into the loading hose by
A method of gradually pulling out the loading hose while filling the inside of the hole with nitrate from the tip of the loading hose inserted into the side hole, or a cylindrical shape slightly smaller than the hole diameter of the side hole in advance and having a length of about 10 cm Packed in a plastic bag with ammonium nitrate,
There has been adopted a method in which a rod-like material having both ends sealed is prepared, and the rod-like material is pushed into each lateral hole with a stick and filled.

[0006] However, in the above-mentioned conventional method for charging a nitric acid explosive, there is a problem that the work efficiency is inferior because all of the work requires a large number of manpowers, and furthermore, there is a problem in that the driving method for a screw conveyor or the like is difficult. When a power supply is used, there is a possibility that an explosion may be induced by static electricity generated at the time of trouble or the like, so that there is a problem that a large amount of labor is additionally required for maintenance management and antistatic measures.

In addition, when filling the above-mentioned nitrite explosive into a vertical hole or a horizontal hole, it is important to make the filling amount in each hole uniform. Mark the outer periphery of the loading hose in advance, insert the loading hose into the hole, and pull out the hole while loading the nitric acid explosive, and measure the length of the unfilled hole by the mark. A method of estimating the filling amount by increasing the length is employed. However, depending on such a method for checking the filling amount, the filling amount in the hole is indirectly checked from the length of the unfilled hole, and therefore, the skill of the operator and the variation in the diameter of the hole drilled are varied. Also, due to various factors such as the time difference when pumping is stopped, etc., the filling amount of each hole will also differ, and as a result, the unevenness of the rock surface after blasting due to the difference in explosive power should be avoided. Can not.

For this reason, it takes time to carry out the crushed rocks and the like, and in order to re-blast, it is necessary to flatten the above-mentioned uneven surface and then drill holes to fill with a nitrite explosive. In addition to this, the work involved is also extremely time-consuming, and the size of the crushed rocks is so large that it is necessary to separate the large rocks again using separate crushing means. There was also a problem that a lot of labor was required. Further, there is also a problem that overfilling is performed depending on the holes, explosive charges are wasted, and economic efficiency is deteriorated. Therefore, a method of sending a fixed amount of explosives by providing a load cell or a load meter in the hopper or the like is also conceivable, but in general, in blasting work in a tunnel or the like, since the filling amount per hole is about 4 kg, However, there is a problem that it is difficult to accurately adjust the charged amount of the explosive due to an error that is inevitably caused by measuring the entire hopper.

The present invention has been made to solve various problems of the above conventional explosive charging method, and it is possible to easily and surely apply a large number of pits or side holes to a blasting theory without requiring skill. To provide an explosive loading machine with a positive displacement meter that can be filled with a fixed amount of explosives, thereby achieving a great rationalization of the blasting operation, and being excellent in economy and safety. It is the purpose.

[0010]

According to the first aspect of the present invention, there is provided an explosive loading machine with a positive displacement meter according to the present invention, wherein a hopper for storing an explosive and a lower portion of the hopper are provided via first opening / closing means. And a charging pipe provided at a lower portion of the positive displacement measuring instrument via a second opening / closing means, and the positive displacement measuring instrument is capable of adjusting an internal volume. A variable volume means for reducing the volume is provided. Here, the invention according to claim 2 is characterized in that the volume changing means has a tubular fixed side chamber connected to a lower portion of the hopper via a first opening / closing means, and a double pipe structure with the fixed side chamber. And a movable side chamber slidably provided with respect to the fixed side chamber, and the charging pipe is connected to the movable side chamber via a second opening / closing means. .

[0011] The invention according to claim 3 is based on claim 1.
In the invention described in or 2, the positive displacement measuring instrument is
At the lower part of the hopper, a tilting device is attached to the lower part of the hopper, and at the lower part of the hopper, a turning device that allows the positive displacement measuring instrument to be rotatable in a horizontal direction is interposed. It is characterized by the following.

Next, an explosive loading machine with a positive displacement meter according to the present invention according to a fourth aspect of the present invention comprises a hopper for storing an explosive in an airtightly sealed interior, and a first hopper below the hopper.
And a transfer pipe provided below the positive displacement meter through a second opening / closing means, and a pressurized gas for supplying a pressurized gas into the hopper. And a plumbing device, wherein the positive displacement meter is provided with a variable volume means capable of adjusting the internal volume.

[0013] In the fourth aspect of the present invention, the fifth aspect of the present invention.
The invention described in is characterized in that the volume variable means is an insert that is provided to be able to advance and retreat in the positive displacement measuring instrument and adjusts the volume in the positive measuring instrument, The invention according to claim 6 is characterized in that the volume variable means is a core that is constituted by a plurality of dividable blocks and is incorporated in a positive displacement meter. In the invention described in (1), the volume variable means is a tubular fixed side chamber connected via the first opening / closing means, and forms a double pipe structure with the fixed side chamber so as to be slidable with respect to the fixed side chamber. It has a movable side chamber provided and a driving device for sliding the movable side chamber, and the transfer pipe is connected to the movable side chamber via the second opening / closing means.

The explosive loading machine with a positive displacement meter according to any one of claims 1 to 3 is mainly used when filling a vertical hole with an explosive. According to this loading machine, an extra charge is previously stored in a hopper. And the filling amount per hole is determined based on the blasting theory, and the volume of the positive displacement meter is adjusted to the above filling amount by the volume variable means. For example, in the invention described in claim 2, the volume of the positive displacement meter is adjusted to the above-mentioned filling amount by sliding the movable side chamber with respect to the fixed side chamber.

Next, with the second opening / closing means closed, the first opening / closing means is opened, and the explosive in the hopper is caused to flow into the positive displacement meter. Then, after a predetermined amount of the explosive is filled in the positive displacement meter, the first opening / closing means is closed, and the tip of the charging pipe is made to face the opening of the hole, and the second opening / closing means is opened. As a result, a predetermined amount of explosive in the positive displacement meter flows into the hole and is filled.

At this time, according to the third aspect of the present invention, since the positive displacement measuring instrument is mounted so as to be inclined with respect to the vertical direction, even when the volume of the positive displacement measuring instrument is adjusted, The change in the height direction at the lower end portion can be suppressed small, and the working range is widened and easily by rotating the positive displacement type measuring instrument in the horizontal direction by the turning device provided at the lower part of the hopper. It is possible to make the tip of the input tube coincide with the opening of the hole.

On the other hand, the explosive loading machine with a positive displacement meter according to any one of claims 4 to 7 is mainly used when the explosive in a hopper is pressure-fed into a lateral hole and is filled. According to this, similarly, after storing an excess explosive in the hopper in advance, a pressurized gas such as compressed air is supplied to the inside through the piping facility, so that at least the inside of the hopper is maintained under a predetermined pressure. In parallel with this, the filling amount per hole is determined based on the blasting theory, and the volume of the positive displacement meter is adjusted to the above filling amount by the volume variable means. At this time, in the invention according to claim 5, the volume in the positive displacement measuring device is reduced by projecting the insert into the positive displacement measuring device to a predetermined position to reduce the volume in the positive measuring device. Adjust to the volume corresponding to the above filling amount.

In the invention according to claim 6,
By appropriately adjusting the number of blocks constituting the core and incorporating it in a positive displacement measuring device, the volume in the positive measuring device is reduced, and the volume in the positive measuring device is filled. Adjust to the volume corresponding to the volume. Further, in the invention according to claim 7, the volume of the positive displacement meter is adjusted to the above-mentioned filling amount by sliding the movable side chamber with respect to the fixed side chamber.

Next, with the second opening / closing means closed, the first opening / closing means is opened, and the explosive in the hopper flows into the positive displacement meter. Then, the first opening / closing means is closed after the predetermined amount of the explosive is filled in the positive displacement type measuring instrument.
Next, for example, a loading hose or the like is connected to the end of the transfer pipe, and the end faces the opening of the hole, and the second opening / closing means is opened. As a result, a predetermined amount of explosive in the positive displacement meter is pumped from the transfer pipe to the loading hose and filled in the hole.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a first embodiment in which the explosive loading machine with a positive displacement meter according to the present invention is applied to a nitrite explosive loading machine for filling a nitrite explosive in a pit, and a modification thereof. FIG.
In this figure, this nitric acid explosive loading machine is of a type that is loaded on a transport vehicle 20 such as a truck, and the reference numeral 1 in the figure is a stand. The gantry 1 has a bottom 1a placed on the carrier 20.
And a support portion 1c, which is composed of a support portion 1b provided upright at one end of the bottom plate 1a and a support portion 1c provided horizontally at an upper end portion of the support portion 1b. The hopper 2 is supported by an opening formed in the center of the hopper 2.

The hopper 2 is for storing a nitrate explosive therein, and a lid 3 is provided at the upper end opening so as to be openable and closable. At the lower end of the hopper 2, an entrance shutter (first opening / closing means) 4 is interposed.
A swivel device 5 is provided below the entrance shutter 4. The pivoting device 5 includes a sliding plate 5 provided on the lower surface of the support portion 1c so as to be pivotable with the hopper 2 aligned with the axis.
a and a handle 5b for turning the sliding plate 5a. An opening communicating with the hopper 2 via the entrance shutter 4 is formed at the center of the sliding plate 5a. And, on the lower surface of the sliding plate 5a of the turning device 5, a positive displacement type measuring device 6 is provided.

The positive displacement measuring instrument 6 is integrated with the sliding plate 5a, and has a tubular fixed side chamber 7 which extends obliquely with respect to a vertical line. It has a tubular structure, and is roughly constituted by a tubular movable side chamber 8 slidably provided with respect to the fixed side chamber 7. Here, the outer peripheral surface of the fixed side chamber 7 is
A scale 9 indicating the volume in the positive displacement type measuring device 6 corresponding to the slide amount is provided. Further, the outer peripheral end of the movable side chamber 8 is tightened toward the outer periphery of the fixed side chamber 7 at a predetermined scale position. By moving the movable side chamber 8 into the fixed side chamber 7
There is provided a fixing bolt 10 for fixing with respect to. An exit shutter (second opening / closing means) 11 is provided at a lower end of the movable side chamber 8.
1 is connected to a charging pipe 12. Note that reference numeral 1 in FIG.
Reference numeral 3 denotes a funnel provided at the opening of the pit 14.

FIGS. 2 and 3 show modified examples of the above-mentioned nitrite explosive loading machine, and the same components as those shown in FIG. 1 are denoted by the same reference numerals. The nitric acid explosive loading machine shown in FIG. 2 is integrally provided on a carrier 22 having wheels 21. The nitric acid explosive loading machine shown in FIG. 3 is of a type that is loaded on a transport vehicle 20 such as a truck, like the one shown in FIG. 1, and a connection hardware 15 is provided at the lower end opening of the movable side chamber 8. An inlet pipe 17 for compressed air is connected to one end of the connection hardware 15 via an opening / closing valve (second opening / closing means) 16. A loading hose (input tube) 18 is connected to the other end of the connection hardware 15.

Next, the operation of the nitrite explosive loading machine having the above configuration will be described. First, the lid 3 is opened to store the nitric acid explosive in the hopper 2, the filling amount per hole is determined based on the blasting theory, and the movable side chamber 8 is slid with respect to the fixed side chamber 7. After adjusting to the scale 9 of the volume corresponding to the amount, the movable side chamber 8 is fixed to the fixed side chamber 7 by the fixing bolt 10.

Next, the outlet shutter 11 or the on-off valve 16 is closed, the inlet shutter 4 is opened, and the nitrous explosive in the hopper 2 flows into the positive displacement meter 6. Then, after a predetermined amount of nitric acid explosive is filled in the positive displacement meter 6, the entrance shutter 4 is closed. Then, the tip of the charging pipe 12 or the loading hose 18 is inserted into the funnel 13 or the vertical hole 14. At this time, handle 5b
By rotating the loading pipe 12 or the loading hose 18 integrated with the sliding plate 5a, the position of the tip is adjusted. Next, by opening the outlet shutter 11 or the opening / closing valve 16, a predetermined amount of nitrous explosive in the positive displacement meter 6 flows into the pit 14 and is filled. Then, after the filling of the pit 14 is completed, the transporter 20 or the trolley 22 moves the nitrous acid explosive loading machine to the next pit, and the above-described filling operation is repeated.

As described above, according to the above-mentioned nitrite explosive loading machine, the movable side chamber 8 is slid with respect to the fixed side chamber 7 because the positive displacement meter 6 whose internal volume is variable is provided below the hopper 2. With only this, it is possible to easily and reliably fill a large number of the pits 14 with a certain amount of nitrite explosive based on the blasting theory without skill. As a result, the nitrous explosive is not wasted due to overfilling as in the related art, and incidental operations such as flattening of uneven surfaces and recrushing of large crushed rocks due to the difference in the filling amount of each vertical hole 14 are performed. Since blasting is not required, blasting work can be greatly streamlined, which is economical. In addition, since a driving source that generates static electricity is not required for operation of the positive displacement measuring instrument 6 and the like, the safety is excellent.

In addition, since the positive displacement measuring instrument 6 is mounted to be inclined with respect to the vertical direction, even when the movable side chamber 8 is slid to adjust the volume of the positive displacement measuring instrument 6, the lower end of the positive displacement measuring instrument 6 can be adjusted. The change in the height direction can be suppressed to be small, so that the height of the hopper 2 can be reduced, and the overall size can be reduced. In addition, hopper 2
The working range is widened by rotating the positive displacement type measuring instrument 6 in the horizontal direction by the swivel device 5 provided at the lower part of the pipe, and the tip end of the charging pipe 12 or the loading hose 18 is easily aligned with the vertical hole 14. be able to.

(Embodiment 2) FIGS. 4 to 7 show an explosive loading machine with a positive displacement meter according to the present invention applied to a nitrous explosive loading machine for mainly feeding and filling a nitrite explosive into a lateral hole. It shows the second embodiment and its modification. As shown in FIG.
a hopper 30 which is supported by a and contains the nitrite explosive therein; a positive displacement meter 33 provided below the hopper 30 via an inlet-side on-off valve (first opening / closing means) 32; A transfer pipe 35 provided at the lower part of the positive displacement meter 33 through an outlet-side on-off valve (second opening / closing means) 34; and piping equipment for supplying compressed air (pressurized gas) into the hopper 30; This is a schematic configuration. The hopper 30 is provided at the lower neck of the lid 31.
A conical umbrella-shaped valve is built in. By operating the lever 30c, the lower neck portion is sealed by the umbrella-shaped valve, so that the inside is kept airtight.

The equipment pipe for supplying compressed air is connected to a connection port 36 to which a supply pipe for compressed air from a compressor (not shown) is connected, and from the connection port 36 to the top of the hopper 30 via an on-off valve 37. A first supply line 38 for supplying compressed air to the inside, a second supply line 40 branched to the supply line 38 and introducing compressed air into the positive displacement meter 33 via an on-off valve 39; A blow line 42 that is branched into the first supply line 38 and that is directly connected to the transfer pipe 35 via an on-off valve 41. The top of the hopper 30 of the first supply line 38 An escape line 44 provided with a cock 43 is provided. In addition, the code | symbol 30b in a figure is a safety valve. In the positive displacement measuring device 33, a variable volume means is provided in order to adjust the internal volume.

This volume changing means is of a type inserted into the inside through an opening formed in the side surface of the volumetric measuring instrument 33, and includes a flange 45 for hermetically closing the opening, and a protruding portion formed on the flange 45. And a plurality of volume adjusting cores (blocks) 47 inserted into the bolts 46 provided. Each of the adjusting cores 47 is formed to have a predetermined thickness. By selecting the number of the discs 47, the volume in the positive displacement measuring instrument 33 can be appropriately adjusted. ing.

FIG. 5 shows a modified example of the above-mentioned variable volume means.
Around the opening formed in the side surface of the cylindrical body 48
And a lid 49 for closing the open end of the main body 48, and a support cylinder attached to the center of the lid 49 and having a female screw formed on the inner peripheral surface with which the screw portion 50a of the rotating shaft 50 is screwed. Part 5
1 is provided, a bottomed cylindrical insert 52 is slidably provided in the main body 48, and the distal end of the rotating shaft 50 is fixed to the bottom plate of the insert 52. By rotating the handle 53 of the rotating shaft 50 to move the insert 52 into and out of the positive displacement meter 33,
The internal volume can be adjusted freely. In the figure, reference numeral 54 denotes a seal for keeping the inside of the positive displacement meter 33 airtight, and reference numeral 55 denotes a branch pipe which is branched from the first supply line 38 so that the inside of the insert 52 is positive displacement type. This is a compressed air introduction pipe for maintaining the same pressure as the internal pressure of the measuring device 33.

FIG. 6 shows another modification of the above-mentioned volume changing means. The variable volume means is provided in a cylindrical fixed side chamber 56 connected to the inlet side opening / closing valve 32 at the lower part of the hopper 30, and is provided in a double tube structure with the fixed side chamber 56 so as to be slidable with respect to the fixed side chamber 56. And a hand jack (driving device) 58 which is connected to a lower portion of the movable side chamber 57 and slides the movable side chamber 57 in a vertical direction. A lower end portion of the movable side chamber 57 A pipe is connected to the outlet-side on-off valve 34. Here, the fixed side chamber 56 and the movable side chamber 57
Opposite flanges 59 and 60 are integrally formed at the lower end of each, and between these flanges 59 and 60,
Retaining bolt 61 and nut 6 of movable side chamber 57
2 are provided. Further, the fixed side chamber 56 and the movable side chamber 5
7, a seal 63 for hermetically sealing the inside is provided.

FIG. 7 shows another modification of the nitrite explosive loading machine shown in FIG.
Each on-off valve in the equipment pipe for supplying compressed air is made remotely controllable. That is, the inlet-side opening / closing valve 32 and the outlet-side opening / closing valve 34 before and after the positive displacement meter 33 and the opening / closing valve 41 in the blow line 42 are each configured by a control valve that is opened and closed by compressed air.
A branch pipe 70 is interposed in the first supply line 38 so that compressed air for control is supplied to a control panel 71. And these on-off valves 32, 34, 41
Each of the control panels 71 is controlled to be opened and closed by control compressed air from the control panel 71.
Is provided with a portable remote control panel 72 for sending control air for controlling the opening and closing of the on-off valve.

Next, the operation of the ammonium nitrate explosive loading machine according to the second embodiment shown in FIGS. 4 to 7 will be described. First,
Similar to the first embodiment, the hopper 3
After storing a predetermined amount of explosive in the chamber 0, a compressed air supply hose is connected to the connection port 36, and the on-off valves 37 and 39 are opened to open the hopper 30 and the volume from the first and second supply lines 38 and 40. By supplying compressed air at a predetermined pressure to the inside of the type measuring device 33, the pressure is maintained at a constant pressure, for example, ² to 6 kg / cm ² . At the same time, the filling amount per hole is determined based on the blasting theory, and the volume of the positive displacement meter 33 is adjusted to the above-mentioned filling amount by the variable volume means.

For example, in the nitric acid explosive loading machine shown in FIG. 4, the number of adjusting cores 47 is appropriately adjusted, and this is incorporated in the positive displacement measuring device 33 to reduce the volume. Adjust to the volume corresponding to the filling amount. FIG.
In the nitrous acid explosive loading machine shown in FIG. 5, the handle 53 is rotated to rotate the rotation shaft 50 to the support cylinder 5 as shown by the dotted line in the figure.
By tightening the insert 1, the insert 52 is protruded to a predetermined position in the positive displacement meter 33, and the internal volume is reduced to adjust the insert 52 to a volume corresponding to the filling amount. At this time, if compressed air is supplied from the introduction pipe 55 into the insert 52, the pressure before and after the insert 52 can be made substantially equal, so that the handle 53 can be easily rotated with a small force. be able to.

Further, in the nitric acid explosive loading machine shown in FIG. 6, by operating the hand jack 58 to slide the movable side chamber 57 upward with respect to the fixed side chamber 56, the volume of the positive displacement meter 33 is increased. Adjust to the filling amount. Next, the outlet-side on-off valve 34 is closed, the inlet-side on-off valve 32 is opened, and the ammonium nitrate in the hopper 30 flows into the positive displacement meter 33. Then, after a predetermined amount of nitric acid explosive is filled in the positive displacement meter 33, the inlet-side on-off valve 32 is closed. Next, for example, a loading hose or the like is connected to the distal end of the transfer pipe 35, the distal end faces the opening of the lateral hole, and the outlet-side on-off valve 34 is opened. As a result, a predetermined amount of nitrous explosive in the positive displacement meter 33 is fed from the transfer pipe 35 to a loading hose (not shown) by pressure and filled in the lateral hole.

As described above, even with the nitrous acid explosive loading machine shown in the second embodiment, a large amount of lateral holes can be easily and reliably supplied to a large number of lateral holes without skill, based on a blasting theory. It can be filled with ammonium nitrate explosives, thus also achieving a great rationalization of the blasting operation, which is excellent in economy and safety. At this time, in the nitric acid explosive loading machine shown in FIG. 7 in particular, an operator arranged near the side hole to be loaded requires a remote control panel 72.
Can be operated to remotely open and close the on-off valves 32, 34 and 41 via the control panel 71, so that the required number of workers can be reduced and the remote operation of these Is controlled by compressed air, there is no possibility of generating static electricity, and safety is excellent.

In the first and second embodiments, the present invention is applied to the case where the present invention is applied to a loading machine for filling a vertical hole or a horizontal hole with a nitrite explosive. However, the present invention relates to another explosive. Can be similarly applied. Further, in the description of the second embodiment, the case where the nitrite explosive is loaded into the side hole by the nitrite explosive loading machine has been described. However, the present invention is not limited thereto. The pit 14 shown in the first embodiment
The same can be used when filling the inside with a nitrite explosive.

Further, in FIG. 7, the on-off valves 32, 3
Although only the case where compressed air is used when opening and closing the doors 4 and 41 remotely is described above, it is also possible to perform electrical remote control between the remote control panel 72 and the control panel 71. . FIG.
As shown in FIG.
A cylinder 81 in which a piston 80 is incorporated is provided in place of the bearing cylinder 51 shown in FIG. 7, and the tip of the piston 80 is fixed to the bottom of the insert 52 and a cylinder air supply for supplying compressed air into the cylinder 81 is provided. By providing a line 82 and providing a rotary shaft 50 for stroke adjustment having a handle 53 at the other end of the cylinder 81,
After adjusting the amount of protrusion of the insert 52 by the rotating shaft 50, the piston 80 is driven by the compressed air supplied into the cylinder 81, and the insert 52 is caused to protrude to a predetermined position in the positive displacement meter 33. It may be.

[0040]

As described above, according to the explosive loading machine with a positive displacement meter according to any one of the first to seventh aspects of the present invention, the inner volume is variable at the lower part of the hopper. Since the weighing machine is installed, a large amount of explosives based on the blasting theory can be easily and reliably filled into a large number of pits or side holes without skill, and thus the blasting work is greatly reduced. The effect that the rationalization can be achieved, the economy is excellent, and the safety is also excellent is obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a modification of the first embodiment.

FIG. 3 is a side view showing another modification of the first embodiment.

FIG. 4 is a front view showing a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a modified example of the volume changing means of the second embodiment.

FIG. 6 is a longitudinal sectional view showing another modified example of the volume changing means of the second embodiment.

FIG. 7 is a front view showing another modification of the second embodiment.

FIG. 8 is a longitudinal sectional view showing another modification of the volume changing means shown in FIG. 5;

[Explanation of symbols]

 2, 30 Hopper 4 Inlet shutter (first opening / closing means) 5 Swivel device 6, 33 Volumetric weighing device 7, 56 Fixed side chamber 8, 57 Movable side chamber 11 Outlet shutter (second opening / closing means) 12 Input pipe 14 Vertical hole 16 On-off valve (second on-off means) 17 Inlet pipe for compressed air 18 Loading hose (input pipe) 32 Inlet-side on-off valve (first on-off means) 34 Outlet-side on-off valve (second on-off means) 35 Transfer pipe 36 Connection port for compressed air 47 Core for volume adjustment (block) 50 Rotating shaft 52 Insert 53 Handle 58 Hand jack (drive unit)

Claims (7)

[Claims] 1. A hopper for storing explosives, a positive displacement meter provided below the hopper via a first opening / closing means, and a second opening / closing means below the positive displacement meter. An explosive loading machine with a positive displacement meter, characterized by comprising a charging pipe provided therein, and the positive displacement type measuring device being provided with a volume variable means capable of adjusting the internal volume. 2. The variable volume means includes a tubular fixed side chamber connected to a lower portion of the hopper through the first opening / closing means, and a double pipe structure formed with the fixed side chamber. 2. The positive displacement type according to claim 1, further comprising: a movable side chamber slidably provided with the input pipe connected to the movable side chamber via the second opening / closing means. Explosive loading machine with scale. 3. The positive displacement weighing device is attached to a lower portion of the hopper so as to be inclined with respect to a vertical direction, and the lower portion of the hopper is configured to rotate the positive displacement weighing device in a horizontal direction. The explosive loading machine with a positive displacement meter according to claim 1 or 2, characterized in that a swivel device that allows free movement is interposed. 4. A hopper for accommodating an explosive in an airtightly sealed interior, a positive displacement weigher provided at a lower portion of the hopper through first opening / closing means, and a lower weigher provided at a lower portion of the positive weigher. And a piping system for supplying pressurized gas into the hopper, and the positive displacement meter can adjust the internal volume. An explosive loading machine with a positive displacement meter, characterized by having a variable volume means. 5. The volume variable means according to claim 4, wherein said volume variable means is an insert which is provided in said volume type measuring device so as to be able to advance and retreat and adjusts the volume in said volume type measuring device. Explosive loading machine with positive displacement meter. 6. The displacement type measuring instrument according to claim 4, wherein the volume changing means is constituted by a plurality of dividable blocks and is a core incorporated in the displacement type measuring instrument. Explosive loading machine. 7. The fixed-volume means is provided with a tubular fixed side chamber connected through the first opening / closing means, and slidably with respect to the fixed side chamber in a double-pipe structure with the fixed side chamber. 5. The movable side chamber provided with a drive device for sliding the movable side chamber, wherein the transfer pipe is connected to the movable side chamber via the second opening / closing means. Explosive loading machine with positive displacement meter.