JPS5995400A - Device for charging detonator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an explosive loading device that pumps packaged explosives (hereinafter simply referred to as packaged explosives) using air mixed with a mist or granular liquid.

2. Description of the Related Art Conventionally, there has been known an explosive loading device that uses air to forcefully feed a packaged explosive through a loading machine and a loading hose into a charging hole formed in a rock or board.

However, the loading hose that is inserted all the way to the bottom of the charging hole is only a part of its total length; If the packaged explosive is pumped with air, it may curve before it reaches the hole opening, and unnecessarily long parts should be rolled up to prevent them from interfering with work. The packaging (e.g., vinyl) of the packaged explosives may be torn due to friction, and the jelly-like explosives may adhere to the inner surface of the loading hose, or the friction may reduce the pumping speed of the packaged explosives, and the This problem prevents smooth loading of packaged explosives and prevents close loading, which is important for increasing blasting efficiency.

The present invention was made in view of the above, and by force-feeding the packaged explosive with air mixed with a mist or granular liquid, a liquid film is created on the inner surface of the loading hose, thereby causing the inside of the loading hose to flow. An object of the present invention is to provide an explosive loading device that can reliably and efficiently pump packaged explosives by preventing the packaging of the packaged explosives from being torn, and also by preventing a decrease in the pumping speed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to embodiments with reference to the drawings.

In Figures 1 to 3, reference numeral 1 denotes an explosive loading device, in which a packaged explosive A (see Figure 3) is inserted into a charging hole (not shown) opened in the bedrock through a loading machine 2 and a nearly cylindrical loading hose 6. ).

That is, a supply port 5a is formed at one end of the loading cylinder 5 in the loading machine 2, and a loading hose 6 that communicates with the charging hole is connected to the other end, and the packaged explosive A is supplied to the loading cylinder 5. It is configured so that it can be loaded from the port 5a and fed under pressure to the charging hole through the loading hose 6.

In the passage 4 formed in the loading cylinder 5, an upstream opening/closing valve 6 is disposed near the supply port 5a, and a downstream opening/closing valve 7 is disposed downstream of the upstream opening/closing valve 6. Both on-off valves 6 and 7 open and close the passage 4, respectively, and are normally provided so as to be opened by their own weight.

Further, a striker 8 for detecting explosives is rotatably attached to the outer wall of the loading cylinder 5 via a mounting member 9 between the opening and closing valves 6 and 7. This striker 8 is normally always biased by a spring (not shown) or the like so that its tip protrudes into the passage 4 of the loading barrel 5 through an insertion hole 10 formed in the outer wall of the loading barrel 5.

The passage 4 of the loading cylinder 5 also has an upstream air supply passage 11 that opens toward the back when the L flow side on-off valve 6 is in the open position, and an upstream air supply passage 11 that has one end that opens toward the back when the L flow side on-off valve 6 is in the open position. The downstream air supply passages 12 that open toward the back side of the case are communicated with each other. An air pilot type switching valve 14 is connected to the other ends of the upstream and downstream air supply passages 11.12 to switch the supply of air from the air supply source 13 to both air supply passages 11.12. This switching valve 14 is normally always biased by a spring 14a so as to supply air to the downstream air supply passage 12.

In the middle of the downstream air supply passage 12, a water sprayer 15, which is a mist generating means for turning liquid water into a mist or granules, is disposed to form a water film 4 on the inner surface of the loading hose B. ing. Note that antifreeze is used in winter to prevent freezing.

As shown in FIGS. 7 and 5, this water sprayer 15 has connecting fittings 2 fixed to both ends of a cylindrical outer casing 21 to an air hose constituting the downstream air supply passage 12.
2.23 is installed, and the fitting 22.23
An inner pipe member 24 that directly communicates with the air supply passage 12 is installed coaxially with the outer casing 21 between them.

However, the outer casing 21 and the inner/guid part 24
An annular space B formed between the outer casing 21 and the outer casing 21 is filled with water through an opening 21a formed in the outer casing 21. A plug 25 is removably screwed into this opening 21a. This plug body 25 is connected via a chain 26 to a ring 27 that is fitted onto the inner pipe member 24 .

Furthermore, one of the connecting fittings 22 and 23, that is, the downstream connecting fitting 23, is provided with a vertical member 28 that partially blocks the downstream air supply passage 12.

This vertical member 28 has a lower passage 29 having a lower opening 29a at the upstream end that opens opposite to the air flow direction, and a lower passage 29 having a lower opening 30a opening in the air flow direction at the downstream end. Upper passages 60 are respectively formed. A downstream end of the lower passage 29 is open to the space B through a communication passage 1 formed in the connecting fitting 26. On the other hand, the upstream end of the upper passage filter 0 is communicated with the space B through another communication passage filter 2 formed in the connecting fitting 2 filter and a lead-out vibratory filter connected to the communication passage 62.

At the same time, a needle-shaped valve body '54a of the water amount regulating valve 64 is interposed in the upper passage 6o. This water amount adjustment valve 64 is constructed such that the valve body 34a is connected to a base body 34b which is screwed into the connecting fitting 2, and thereby adjusts the amount of screwing between the connecting fitting 26 and the base body 34b. Opening hole 30a
It is designed to adjust the amount of mist or granular water supplied. In addition, 65 is a filter member, 66.67
is a sealing material.

Furthermore, a detection valve 42 is interposed in the air pilot circuit 41 of the switching valve 14. This detection valve 42 is connected to a mounting member 9 corresponding to a pressing member 43 protruding from the striker 8.
It is attached to the opening and opened when the suppressing member 46 performs a suppressing operation in response to the detecting operation by the striker 8.

A pressure sensing type preset counter 4 is connected to the air pilot circuit 41 in parallel with the detection valve 42 via a parallel circuit 44.
5 is connected, thereby conducting air from the air supply source 46 at a predetermined number of counts, and the switching valve 14
the air supply source 13 to the upstream air supply passage 11.
It is possible to supply air from The preset counter 45 is fixedly attached to the mounting member 9.

The switching valve 14 and the detection valve 42 of the air pilot circuit 41
One end of a count detection circuit 47 is connected between and the other end of the detection circuit 47 is connected to the pressure receiving section of the preset counter 45.

Note that 48 is a valve for applying pressure from either the air pilot circuit 41 or the parallel circuit 44 to the switching valve 14;
An indicator 9 is connected to the downstream side of the preset counter 45 of the parallel circuit 44 and indicates when the counter 45 is conductive. 50 is a support tripod, and 2 is a horizontal line.

With the above configuration, when the packaged explosive A is inserted through the supply port 5a of the loading cylinder 5, the explosive A collides with the tip of the striker 8, causing the striker 8 to rotate. This rotating operation, that is, the detection operation of the striker 8 is transmitted to the detection valve 42 via the pressing member 46, and when the detection valve 42 opens, air from the air supply source 46 is conducted to the air pilot circuit 41. , the switching valve 14 is operated to switch against the biasing force of the spring 14a. As a result, the upstream opening/closing valve 6 is closed due to the pressure of air discharged from the air supply source 16 from the opening on the side of the loading cylinder 5 in the upstream air supply passage 11, and the packaged explosives in the passage 4 of the loading cylinder 5 are closed. The explosive A moves downstream in the passage 4 due to the pressure of the air flowing into the upstream side of A.

Next, when the packaged explosive A moves downstream in the passage 4 and leaves the contact state with the striker 8 and comes to be located downstream of the downstream opening/closing valve 7, the striker 8 returns to its normal state. As the detection valve 42 closes accordingly, the switching valve 14 is also returned to its normal state by the biasing force of the spring 14a. This allows the air supply source 1
3 is supplied to the downstream air supply passage 12, and the downstream opening/closing valve 7 is closed by the pressure of the air discharged from the opening of the passage 12 on the side of the loading cylinder 5, and the packaging in the passage 4 of the loading cylinder 5 is The pressure of the air flowing into the upstream side of the explosive A forces the explosive A into the charging hole through the loading hose 6. At that time, the air supplied from the air supply source 13 through the downstream air supply passage 12 is partially transferred from the lower opening 29a of the vertical member 28 to the lower passage 29 in the water sprayer 15 interposed in the middle. The water enters the space B' through the communication path 31 and pressurizes the water filling the space B. Due to the pressurizing action, water is supplied in the form of mist or granules from the upper opening 30a of the vertical member 28 through the lead-out pipe 66, the communication path 62, and the upper passage 60, and the air that pressurizes the packaged explosive A is supplied. mixed with As a result, a water film is formed on the inner surface of the loading hose 3, and the friction between the loading hose 6 and the packaged explosive A is reduced, so that the package of the packaged explosive A is not torn and the pumping speed is reduced. Prevented. Further, the water film on the inner surface of the loading hose 6 can also remove static electricity generated when the packaged explosive A is pumped.

In this way, the charging of the packaged explosives is carried out sequentially, and the scheduled number of packaged explosives A, A, . . . are loaded under pressure into the charging holes.

Incidentally, in the above embodiment, a count signal is input to the pressure receiving section of the preset counter 45 via the count detection circuit 47 every time air is conducted to the air pyro circuit 41. When a count signal equal to the scheduled count number of the preset counter 45 is input to the pressure receiving section, air from the air supply source 46 is conducted to the air pilot circuit 41 via the preset counter 45, and the switching valve 14 performs the switching operation. be done. Thereby,
Air from the air supply source 13 is continuously supplied to the upstream air supply passage 11, and the upstream opening/closing valve 6 is closed by the pressure of the air discharged from the opening of the passage 11 on the side of the loading cylinder 5.
and is kept in its closed state. As a result, it is impossible to insert a new packaged explosive A, that is, more packaged explosives A than the planned number, from the supply port 5a of the loading cylinder 5.

In the above embodiment, the water sprayer 15 is used as the mist generating means.
However, any other means of turning the liquid into a mist or granules, such as one using an ultrasonic vibrator, can be applied.

In addition, in the above embodiment, the water spray which is the mist generating means =
15 is interposed in the downstream air supply passage 12, but it may be provided in the loading hose 6 itself (as far as possible on the upstream side). That is, any pressurized air line that supplies pressurized air to the loading hose 6 may be used.

As described above, the present invention creates a liquid film on the inner surface of the loading hose by force-feeding the packaged explosive with air mixed with a mist or granular liquid. It is possible to prevent the package of the packaged explosive from being torn, and also to prevent the pressure-feeding speed from decreasing, so that the packaged explosive can be reliably and efficiently pressure-feeded, and as a result, close loading of the explosive can be achieved.

Furthermore, if water is used, although oil may be used as the liquid, static electricity generated during the pumping of the packaged explosive can be removed by a water film on the inner surface of the loading hose.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a front view of the explosive loading device, FIG. 2 is a view taken from the entrance direction of FIG.
FIG. 3 is an overall configuration diagram of the explosive loading device, FIG. 7 is a sectional view of the water sprayer, and FIG. 5 is a side view of the same. 1... Explosive loading device, 2... Loading machine,
6... Loading hose, 5... Loading cylinder, 1
5...Water sprayer, A...Packaged explosives

Claims (1)

[Claims] (1) In a device that uses air to forcefully feed packaged explosives into a charging hole opened in rock through a loading machine and a loading hose, a mist that turns the liquid into a mist or granules is placed in the pressure air system path of the loading hose. An explosive loading device characterized in that a generating means is provided to generate a liquid film on the inner surface of the loading hose. (,2) The explosive loading device according to claim 1, wherein the liquid is water.