JPH08159699A - Priming apparatus - Google Patents

Abstract

PURPOSE: To quickly return a priming apparatus to a safe state even with non-firing. CONSTITUTION: Once a thermocell is heated, electromotive force thereof is supplied to a rotary solenoid 2, and once the rotary solenoid 2 is rotated by a predetermined angle, an initial explosive 6 filled in a shutter 4 interlocked with a shaft 3 is located below an electric percussion cap 10 through the shaft 3 on a straight line with an explosion lead compound 7 and an explosion conduction compound 8. Since a capacitor 10 is charged with electricity, as a thylistor 17 is switched on, the electric percussion cap 10 is supplied with electric charges for initiation of explosion. Even with non-ignition, since the thermocell 1 is cooled in a relatively short time to lose electric energy, the rotary solenoid 2 is rapidly returned to a state before the rotation into a safe state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detonator for controlling an explosive so that it does not ignite except at a designated timing.

[0002]

2. Description of the Related Art Conventionally, in order to safely ignite explosives in a fuze, etc., a safety release timing is determined by a timer or the like, and the explosive charge can be ignited by a detonation command only in the safety release state. A detonator equipped with a mechanism is used.

[0003]

By the way, in the conventional detonator, when the explosive is not ignited for some reason in the above safety released state and the explosive does not ignite, the fuze or the explosive is unexploded. And land on the ground. In such a case, in the conventional detonator, the safety release state is not immediately withdrawn, and the safety of the worker performing the post-treatment is not ensured, which is dangerous. The present invention has been made in view of the above circumstances, and an object thereof is to provide a detonator that quickly returns to a safe state even in the case of a non-ignition.

[0004]

In order to solve the above problems, in the present invention, a detonator for controlling the ignition timing of an explosive contains a heating agent and a unit cell, and the heating agent is ignited. A thermal battery that heats the unit cell to generate power, and stops the power generation by lowering the temperature of the unit cell when the heating agent is consumed after a lapse of a predetermined time,
A charging / discharging means that is charged when the thermal battery generates power and discharges when the power generation stops, and a charging / discharging means that is provided at a predetermined distance from the explosive and receives a command while the charging / discharging means is being charged. The ignition means that ignites by the charging energy of, and the detonator whose blast energy is smaller than that of the explosive are contained at a predetermined position, and when power is supplied from the thermal battery, the explosive and the explosive are rotated by a predetermined angle. A detonator mechanism in which the detonator is interposed between the detonator and the ignition unit, and when the power supply is stopped after the predetermined time has elapsed, the detonator is returned to the state before the rotation and the detonator is separated from the explosive and the ignition unit. It is characterized by having and.

[0005]

According to the above construction, when the thermal battery is heated to generate electric power, the charging / discharging means is charged and the detonating mechanism is rotated by a predetermined angle so that the built-in detonator is interposed between the ignition means and the explosive. It is inserted, and it is in the detonation standby state (safety release state). When an ignition command is issued to the ignition means in this state, it receives the charging energy of the charging / discharging means and ignites to ignite the explosive charge, and the explosive charge also ignites the explosive charge, but the instruction was not issued. In this case, if the temperature of the thermal battery drops and power generation stops,
When the charging / discharging means is discharged, the detonating mechanism returns to the state before the rotation, and the detonating material moves away from the ignition means and the explosive material. Therefore, the detonation standby state is released and the safe state is restored.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of an explosive detonator according to an embodiment of the present invention. In the figure, 1 is
It is a thermal battery in which a heating agent (not shown) and a unit cell which becomes conductive at a high temperature are built in, and output terminals a and b as electrodes and ignition terminals c and d are provided.
When the thermal battery 1 is energized from another main power source (not shown) through the ignition terminals c and d, an ignition operation is performed inside the thermal battery 1 to ignite the heating agent and heat the unit cell. It As a result, a predetermined electromotive force is obtained at the output terminals a and b. Further, when the heating agent is consumed after the lapse of a predetermined time, the temperature of the unit cell is lowered and the electromotive force is lowered. That is, the life of the thermal battery 1 is determined by the capacity of the heating agent,
Here, it is assumed that the predetermined time is about several minutes.

Reference numeral 2 is a rotary solenoid (actuator), which generates a rotational motion at a constant angle with high torque when power is supplied through the output terminals a and b of the thermal battery 1. Further, the rotary solenoid 2 has a built-in return spring (not shown), and the thermal battery 1
When the supply of power is stopped by the spring, the spring returns to the state before the rotation.

Reference numeral 3 is a shaft, one end of which is connected to the rotary solenoid 2 with its axis being common. Further, a shutter 4 having a common axis with the shaft 3 is coupled to the other end of the shaft 3. A hole 4a is formed in a part of the shutter 4, and the explosive 6 is filled in the hole 4a. 7 is an explosive charge placed below the shutter 4,
Reference numeral 8 is an explosive charge disposed directly below the explosive charge 7. When the rotary solenoid 2 rotates by the certain angle, the detonator 6 filled in the shutter 4 interlocking with the rotary solenoid 2 and the detonator 7 and the detonator 8 are aligned in a straight line, that is, a so-called “fire passage is connected. It will be in a “state”. These detonators 6,
The explosive charge 7 and the explosive charge 8 have the characteristics that the firing sensitivity becomes “sensitive → insensitive” and the power of the blast becomes “small → large” in this order. This is to ensure that only a small blast power can be easily ignited in case of an accident and to gradually increase the blast power to finally obtain a large blast power.

Reference numeral 10 denotes an electric detonator, which is ignited when a current flows and ignites the detonator 6. The electric detonator 10
The shutter 4 is arranged so as to come closest to the detonator 6 in the state where the shutter 4 is rotated as described above and the conduit is connected. When the shutter 4 returns to the state before the rotation, the detonator 6 is released.
Move away from the electric detonator 10.

The thyristor 17 operates only when it receives a command signal from a remote command means (or timer) described later. The energy stored in the capacitor 13 flows into the electric detonator 10, and the electric detonator 10 is designed to ignite. At this time, if the electric detonator 10 and the detonator 6 are in the above-described state, the detonator 6 receives the ignition energy of the electric detonator 10 and ignites.

As shown in FIG. 1, the terminal q of the electric detonator 10 is grounded, and the terminal p is connected to the charging / discharging circuit 12 described below. The charging / discharging circuit 12 is a circuit in which a capacitor 13 and a discharging resistor 14 are connected in parallel, and a charging resistor 18 is connected in series. One end (reference numeral s)
Is connected to the output terminal b of the thermal battery 1 via the diode 16, and when the electromotive force is supplied from the thermal battery 1, the capacitor 13 is charged. In this state, when the trigger signal St is input to the thyristor 17 to activate the thyristor 17, the accumulated charges are supplied to the electric detonator 10. On the other hand, when the supply of electromotive force from the thermal battery 1 is stopped, the electric charge accumulated in the capacitor 13 is discharged via the discharge resistor 14.

Next, the sequence of the detonation operation by the detonator of FIG. 1 will be described with reference to the timing chart of FIG. The detonation sequence can be executed by remote command means or a timer (not shown). Here, a method using a timer will be described first. Timer Method At time T1, when the main power source is switched from the off state to the on state by a method such as pulling out a pin provided on the detonator (see FIG. 2A), the timer is started. This timer is preset to issue a predetermined command signal at a plurality of timings described below. Next, at time T2, when energization of the thermal battery 1 from the main power source is started by the timer command, the thermal battery 1 switches from the off state to the on state (see FIG. 2B), and electromotive force is generated. It

As a result, the rotary solenoid 2 shown in FIG. 1 is rotated by the electromotive force of the thermal battery 1, and the shaft 3 and the shutter 4 are rotated in the direction of the arrow shown in FIG. Further, the electromotive force of the thermal battery 1 is the charge / discharge circuit 12
Is also supplied to the capacitor 13, and the charging of the capacitor 13 is started. Then, at time T3, when the rotation angle of the rotary solenoid 2 reaches the certain angle, the rotation operation of the rotary solenoid 2, the shaft 3, and the shutter 4 is stopped.

In this state (time T3), the hole 4a of the shutter 4 is located below the electric detonator 10, and the detonators 6, the detonator 7, and the detonator 8 are arranged in a straight line, that is, as described above. It will be in a state where the fireways are connected. Therefore, when the electric detonator 10 is ignited in this state, the hole 4a
The detonator 6 filled in is ignited. That is, the shutter 4 has been switched from the off state (safety state) to the on state (safety release state) (see FIG. 2C).

At time T4, when the thyristor 17 is activated by the timer command, the electric charge charged in the capacitor 13 is supplied to the electric detonator 10. As a result, a discharge current flows through the electric detonator 10 to ignite. Therefore, when the electric detonator 10 is ignited, the detonating charge 6 therebelow is ignited, and further, the detonating charge 7 and the explosive charge 8 arranged in line with this are sequentially ignited, and the blasting power is maximized to explode. .

By the way, the period during which the thermal battery 1 is heated to generate an electromotive force is relatively short as a few minutes as described above,
Even if the initiation command signal is not supplied due to some problem after time T4, the temperature of the thermal battery 1 decreases and becomes inactive, that is, the off state after the period elapses (here, at time T5). (Figure 2 (b)
reference). As a result, the supply of power from the thermal battery 1 to the rotary solenoid 2 is stopped, and the solenoid 2 returns to the state before rotation by the above-mentioned return spring. Therefore, the shutter 4 is also in the original state, that is, the hole 4a is separated from the position of the electric detonator 10 as shown in FIG. Further, since the electric charge accumulated in the capacitor 13 of the charge / discharge circuit 12 is discharged through the resistor 14 and the energy for ignition of the electric detonator 10 becomes zero, there is no possibility that the electric detonator 10 will ignite.

That is, after the time T5, the detonator 6 is
Since the explosive charge 7 and the explosive charge 8 are placed at a position deviating from the line connecting the explosive charge 7 and the explosive charge 8, even if an ignition occurs in the work of removing the main explosive charge, the explosive charge 7 and the explosive charge 8 are not ignited. In addition, since the explosive charge 7 and the explosive charge 8 have lower ignition sensitivity than the detonator 6 as described above, there is almost no fear that the explosive charge 7 and the explosive charge 8 are ignited by themselves during the removal work.

Next, the detonation sequence by the remote operation method via the remote command means will be described below. Remote operation (command) system When the main power supply is switched from the off state to the on state at time T1 as in the case described above, the respective parts of the present safety device described below are in the standby state for receiving the command signal. Next, at time T2, when the energization of the thermal battery 1 from the main power source is started by the remote command operation of the staff member (by a remote switch or the like), the thermal battery 1 is switched from the off state to the on state, and the electromotive force is Is generated.

As a result, similarly to the above, the shutter 4 is turned off (safety state) via the rotary solenoid 2.
To the on state (safety release state) (time T
3). The capacitor 13 is also charged. Then, at time T4, the electric charge charged in the capacitor 13 is supplied to the electric detonator 10 by the remote command operation of the staff member,
The electric detonator 10 ignites. As a result, the detonating charge 6, the detonating charge 7, and the detonating charge 8 are sequentially ignited, and the blasting power is maximized to explode. Then, at time T5, the thermal battery 1 is turned off. The subsequent process of returning to the safe state is the same as the case described above, and the description thereof will be omitted.

As described above, the detonator according to this embodiment is
After a relatively short period in which a detonation command may occur after the safety release state, the thermal battery 1 becomes inactive and the electromotive force decreases, and the electric detonator 10 loses ignition energy, and The rotary solenoid 2 and the shutter 4 are returned to the positions before the rotation, and the conduit including the detonator 6, the detonator 7, and the detonator 8 is disconnected. As described above, since the safe state is quickly restored, there is an effect that the physical safety of the worker who performs the post-treatment is secured. Further, even in the work of incorporating the detonator before the use of the explosive, since the ignition energy of the electric detonator 10 is zero if the thermal battery 1 is not heated, the personal safety of the worker is similarly secured.

[0021]

As described above, according to the present invention, even in the case of a non-ignition, the safety state is promptly restored,
Post-processing can be performed safely.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a detonator in an embodiment of the present invention.

FIG. 2 is a timing chart showing a flow of detonation operation in the embodiment.

[Explanation of symbols]

 1 Thermal Battery 2 Rotary Solenoid (Explosion Mechanism) 4 Shutter (Explosion Mechanism) 6 Explosives 7 Explosives (Explosives) 8 Explosives (Explosives) 10 Electric Detonators (Ignition Means) 12 Charge / Discharge Circuits (Charge / Discharge Means)

Claims (1)

[Claims] 1. A detonator for controlling the ignition timing of an explosive, comprising a heating agent and a unit cell, and when the heating agent is ignited, the unit cell is heated to generate electric power, and after a predetermined time elapses, When the heating agent is consumed, the temperature of the unit cell decreases to stop the power generation, a charging / discharging unit that is charged when the thermal battery generates power, and discharges when the power generation stops, the explosive and a predetermined distance An ignition means which is provided separately and which is ignited by the charging energy of the charging / discharging means when a command is received while the charging / discharging means is being charged, and a detonator having a blast energy smaller than that of the explosive at a predetermined position. When the power source is supplied from the thermal battery, the power source is stopped after a lapse of the predetermined time by rotating by a predetermined angle and inserting the detonator between the explosive and the ignition means. And before turning Detonator characterized by comprising a detonation mechanism away the detonator and returns to state from the explosive and the ignition means.