JP3506270B2 - Electric blasting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blasting device with high detonation accuracy.

[0002]

2. Description of the Related Art As an ignition method for causing a delayed ignition of an electric igniter, there is an ignition method described in JP-A-62-134500 in which an energy supply device and an adapter including an electric delay circuit are combined. In this ignition method, an electric igniter is connected to an adapter having an electric delay circuit, and energy is emitted to each igniter after a preset delay time in the electric delay circuit section to ignite.

A method for controlling the detonation time of explosives at the site of blasting is disclosed in JP-B-63-1812.
There is a blasting method using a blaster described in No. 0. In the blasting method, a unit capable of controlling the detonation time is configured in the apparatus, and the output is sequentially taken out at a predetermined time interval set in the blaster to detonate an electric detonator.

In the blasting, each of the electric detonators to be detonated may be instantly detonated by the electric energy output from the detonator, or may be individually detonated by the delaying ability depending on the electric detonator.

[0005] Japanese Patent Publication No. 4-67120 and Japanese Patent Laid-Open No. 1-1071 disclose that the time can be arbitrarily set on site by supplying a control signal from a blasting device to the terminal electron detonator.
There is a blasting method using an electronic detonator and a blaster described in No. 00.

The method of arbitrarily setting the second time may be set in advance in the electronic detonator, or may be set by supplying a unique control signal from the blaster to each electric detonator. .

[0007]

Problems to be Solved by the Invention JP-A-62-1345
The ignition method described in No. 00 allows the delay time to be arbitrarily set in advance, but the delay time cannot be arbitrarily set and changed at each site. In addition, Japanese Examined Japanese Patent Sho 63-
The ignition method described in Japanese Patent No. 18120 can adjust the time interval at each site and sequentially detonate, but individual delay times cannot be set arbitrarily.

According to the blasting method described in Japanese Examined Patent Publication No. 4-67120 and Japanese Patent Laid-Open No. 1-107100, the electron detonator connected to the end accurately receives the control signal from the blaster. There must be. further,
In these methods, the circuit that receives and controls the control signal from the blaster is built-in inside the electron detonator, so it cannot be used repeatedly, and the blaster and the electron detonator transmission means normally blast. At the site where the blasting is performed, there is a risk of malfunction due to electrical noise being mixed in at the blast bus, auxiliary bus, or the connection part connected to the electronic detonator accompanying the blast work.

[0009]

In order to achieve the above object, the present invention charges a blasting energy supplier and electric energy simultaneously supplied from the blasting energy supplier, and uses the charging start point as a reference. At least two second time setters for supplying the charged electric energy to different electronic delay electric detonators after any settable delay time, and the slowest time set in each of the second time setters. The delay time is shorter than the shortest delay time set for all the electronic delay electric detonators.

Further, in the present invention, preferably,
The second time setting device is a capacitor that charges the electric energy from the blasting energy supplier, and a delay time that can arbitrarily set a delay time based on a start time of charging the electric energy to the capacitor. It has a setting means and a means for supplying the electric energy charged in the capacitor to the electronic delay electric detonator after the delay time set by the delay time setting means.

Further, preferably, the delay time setting means has a preset digital counter capable of setting a counting end point. Further, the present invention provides that the blasting energy supplier simultaneously supplies electric energy to at least two time setting devices, and the electricity supplied from the blasting energy supply device in each of the at least two time setting devices. Energy is charged, and from each of the at least two time setting devices, another electronic delay electric detonator is charged after the delay time that can be arbitrarily set based on the start time of the charging. At the time of supplying the electric energy to start the detonation, the electronic delay electric detonator to be detoned first among the electronic delay electric detonators is set by the at least two time setting devices before the timing of detonation. It is characterized by ending the late delay time.

An electronic delay electric detonator to be blasted by the electric blasting device of the present invention is disclosed in, for example, Japanese Patent Laid-Open No. 5-079.
It is possible to use the ones characterized by detonating with a high delay time by supplying the electrical energy proposed in 797. In addition, the preset delay time of the electronic delay electric detonator may be one kind or about two or four kinds. By limiting the delay time in this way, the product cost of the electronic delay electric detonator is significantly reduced. There is an effect of doing.

The power source section of the blast energy supplier may be one which can obtain a direct current, for example, by boosting a low direct current by a DC-DC converter and charging it in a capacitor, and is composed of a high voltage current source. May be.

A blasting energy supplier of this type is proposed in Japanese Patent Laid-Open No. 4-169800.

The means for arbitrarily setting the second time of the second time setting device can be constituted by a number of dial switches or momentary switches according to the maximum number of digits of the set time, but a preset that can set the counting end point It may be configured by a dip switch, a toggle switch, a push button switch, or the like based on the binary number of the digital counter, or an electrically writable memory circuit. The memory circuit may be composed of RAM or EEPROM. In the configuration according to the present invention, the means for arbitrarily changing the setting of the second is easy and can be repeatedly used.

The second time setting device is preferably connected in series to the blast energy supply device. However, parallel connection may be possible due to the additional function of the time setting device.

The electronic delay electric detonator connected to the electric blasting device of the present invention is preferably connected in series to the time setting device.

The second time setting device is arranged so as not to be damaged by the influence of the explosive charge that explodes or the detonation energy of the electronic delay electric detonator. Therefore, for example, even if the delay time setting circuit is configured by an electrically writable memory circuit and an expensive cable such as a cable for telecommunications is used, the product cost is industrially sufficient. It can be configured to be usable, and technically sufficient electrical noise countermeasures can be configured.

[0019]

In the present invention, the initiation delay time in a plurality of holes can be achieved by combining the electric blasting device of the present invention with an electronic delay electric detonator with high accuracy in seconds.

Further, the exploding time of the explosive is determined by the combination of the time setting device and the delay time of the electronic delay electric detonator. Since the delay time of the time setting device can be arbitrarily set, it is possible to arbitrarily set the detonation delay time at which the electronic delay electric detonator fires.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of the configuration of an embodiment of the present invention.
FIG. 2 shows a specific circuit block diagram of the same embodiment. FIG. 3 shows a specific connection example of the same embodiment. Hereinafter, this embodiment will be described in detail.

When the charge control unit operation switch 6 of the blast energy supplier 1 is closed, a predetermined DC current is applied from the power source unit 4 to the capacitor 5. This direct current voltage is, for example, a low direct current voltage composed of 1.5 v × 4 batteries.
-It can be boosted by a DC converter. For example, the capacitance value of the capacitor 5 used may be 100 μF, and the maximum charging voltage may be 2200 v. Here, the electric energy charged in the capacitor 5 accumulates an appropriate electric charge according to the set number of the second time setter 2 and the electronic delay electric detonator 3 which are actually arbitrarily set. After charging, the charging voltage of the capacitor 5 is detected by a charging display unit (not shown), and when the voltage reaches a predetermined value, the charging display unit displays it. After confirming this display, switch 6
Is switched, the capacitor 5 is discharged. The proper first electric energy discharged from the capacitor 5 is the charging / discharging capacitors 9 and 10 connected in series of the time setting device 2 electrically connected via the electric wires 18a and 18b.
Is charged to. Delay time setting circuit 20 in the time setting device 2
Is a constant voltage circuit 11, a counter reset holding circuit 12,
It has a timer circuit 13, an oscillator 14, and a setting controller 15.

At the same time that the second time setter 2 is supplied with electric energy, the capacitors 9 and 10 are charged, and the oscillator constituting the oscillating unit 14 of the delay time setting circuit 20 is activated to oscillate an oscillation pulse. start. The counter that constitutes the timer circuit 13 and counts the oscillation pulse is a counter reset holding circuit 12 that holds a predetermined time so that the counter does not count until the oscillation unit 14 becomes stationary.
The count is started after receiving the signal from. The oscillating unit 14 can also start oscillation by a separate power source before being supplied with the electric energy and keep the oscillation steady, and in this case, the counter reset holding circuit is unnecessary.

The second time setting device 2 charges the capacitors 9 and 10 with the first electric energy supplied from the blast energy supplying device 1 through the input resistor 7 and the rectifier 8.
In this embodiment, the delay time setting circuit 20 is driven by the electric energy charged in the capacitors 9 and 10. Therefore, the blasting energy supply device is configured by the capacitors 9 and 10 so that the constant voltage circuit 11 is not loaded with an excessive voltage. The supply energy from 1 is divided, and the divided electric energy is supplied to the constant voltage circuit 11. For example, the capacitance value of the capacitors 9 and 10 is composed of 2000 μF in total, and the voltage supplied from the blast energy supplier 1, for example, 26.4 v at maximum is divided and charged.

When the delay time setting circuit 20 is driven by another power source, such consideration is unnecessary.

The counter reset holding circuit 12 receives the output voltage from the constant voltage circuit 11 and charges a simple time constant circuit which is a combination of a capacitor and a resistor set for the time until the oscillation pulse reaches a sufficiently steady state. Then, when the set time is reached, the signal is output to the timer circuit 13. Therefore, in the case of the present embodiment, the delay time setting circuit 20
Need not receive a unique control signal from the blast energy supplier 1. When the oscillation pulse is counted up to a predetermined delay time arbitrarily set by the timer circuit 13, an electric signal is transmitted from the timer circuit 13 to the switching unit 17 (that is, the gate of the thyristor forming the switching unit 17 is turned on), Charged capacitors 9,10
The electric charge of the electronic delay detonator 3 through the electric wires 19a and 19b.
To be discharged. When the delay time is arbitrarily set for the timer circuit 13, the setting control unit 15 including a toggle switch train is provided.
By changing the count end point of the preset digital counter of the timer circuit 13, it is possible to arbitrarily change the setting.

In the discharge through the switching unit 17, the electronic delay electron detonator 3 malfunctions or a failure of the electronic delay electric detonator occurs when a load of more than appropriate electric energy is applied, so that the time setting device is set. 2 has a ballast circuit 16 which is configured so that excess electrical energy is not discharged by the electronic delay electric detonator.

Further, when a plurality of time setting devices 2 are connected to one blasting energy supply device 1 and each electronic delay detonator 3 is connected to each time setting device 2, In order to prevent disconnection of the blast circuit due to detonation due to time-up of the electronic delay electric detonator 3, that is, the energy discharge from the full-second time setting device 2 is applied to the energy storage capacitor of the electronic delay electric detonator 3 to operate. At the time of starting, in order to prevent the detonation of the electronic delay electric detonator 3 in the first stage, it is necessary to set all the time setting devices 2 rather than the delay time set by the electronic delay electric detonator 3, for example. Use to shorten the delay time that is arbitrarily set.

After the delay time of each different time setting device 2,
The second electric energy from the energy storage capacitors 9 and 10 of the time setting device 2 is applied to the electronic delay electric detonator 3 through the electric wires 19a and 19b. The delay time of the electronic delay electric detonator 3 is set in advance, and the time may be the same time. In this embodiment, an electronic delay electric detonator is disclosed in Japanese Patent Laid-Open No. 5-797.
The one proposed in No. 97 was used.

Assuming the distance of each detonation hole, as shown in FIG. 3, the blasting energy supplier 1 and the second time setting devices 2-1, 2-2, 2-3 are separated from each other. It is also possible to arrange them. Further, it is possible to integrate the blasting energy supplier and the time setting device into an integrated device.

FIG. 4 shows the operation timing and the capacitor charging / discharging voltage waveform of each part in the configuration of FIG. In the present embodiment, for the purpose of explaining the unique principle, only three electronic delay electric detonators are arranged, and an operation pattern when sequentially detonating is specifically described. Also, the case where the delay time of the electronic delay electric detonator shown here has the same length will be described.

At time T ₀ , the proper first electric energy charged in the capacitor 5 of the blast energy supplier 1 is
All the time setting device 2 is discharged. At the same time second setting device 2
The charging / discharging capacitors 9 and 10 provided inside are charged, and the oscillation pulse of the oscillating unit 14 is counted until the delay time arbitrarily set by each time setting device. At time T ₁ , the time setter 2-1 that has counted up to a predetermined delay time that has been arbitrarily set has timed up, and an appropriate second electric energy is discharged to the electronic delay electric detonator 3-1. The delayed electric detonator 3-1 starts operating.

At time T ₂ , the time setter 2-2 counts up to a predetermined delay time, and the electronic delay electric detonator 3-2
The second electric energy is discharged to the. The same operation is performed thereafter, and at time T ₃ , the second time setter 2-3 discharges the second electric energy to the electronic delay electric detonator 3-3.

At this time T ₃ , any electronic delay electric detonator still counts the oscillation pulse until the arbitrarily set delay time, and no detonation is performed. All the electronic delay electric detonators are activated by receiving the second electric energy from the time setting device. At time T ₄ , the electronic delay electric detonator 3-1 that has counted the oscillation pulses until the arbitrarily set delay time is up, and the detonator is detonated.

At this time, a non-explosive circuit will not be generated even if each connection line is cut by the initiation of the electronic delay electric detonator 3-1 and the initiation of the explosive.

At time T ₅ , an electronic delay electric detonator 3-2
There is detonated similarly electric detonators counts the pulses until a predetermined delay seconds, the time T ₆ electronic delay electric detonator 3-
3 detonates. In this embodiment, the set delay time of the electronic delay electric detonator to be set and the maximum delay time of the time setting device have the following relationship.

[0037]

[Equation 1] t _2-9 <t _9-1 = t _9-2 = t _9-9 For example, the _detoning time of each detonating hole should be the same at the set second of the electronic delay electric detonator. For example, it is the time difference set by the second setting device. Also, even if the delay time difference of the electronic delay electric detonator is different, the delay time arbitrarily set by all the time setting devices from the preset delay time of the electronic delay electric detonator that detonates first You can shorten it.

[0038]

According to the present invention, the initiation delay time corresponding to each blasting face can be arbitrarily set at the blasting site, and high initiation accuracy is provided.

Since the electronic delay electric detonator having the same delay time can be used, it is easy to handle, no mistaken connection is made in the work, and the connection method can be performed as usual. Furthermore, since the setting method for the second is easy, even an unskilled person or an inexperienced person can easily set and detonate.

Also in the production of detonators, since it is possible to detonate with electronic delay electric detonators having the same delay time, individual electronic delay electric detonators having different delay times are manufactured. There is no need, and it is easy to manufacture, and at the same time, there is no need to handle electronic delay electric detonators with different delay times in terms of inventory and management, and a cheaper electronic delay electric detonator can be provided.

In addition, the second time setter can be reused because it can be arranged at a distance sufficiently away from the detonation hole where the electronic delay electric detonator is installed so as not to be damaged. is there.

Furthermore, it becomes possible to quickly and easily carry out a diagnosis / verification test for reducing vibration and noise, and for control blasting by controlling the grain size in a quarry.

[Brief description of drawings]

FIG. 1 is a schematic diagram of the configuration of an embodiment of the present invention.

FIG. 2 is a specific circuit block diagram of the embodiment.

FIG. 3 is a diagram showing a specific connection example of the same embodiment.

FIG. 4 is a diagram showing an operation timing and a capacitor charging voltage waveform of each part of the embodiment.

[Explanation of symbols]

1 Blast energy supplier 2 second time setting device 3 Electronic delay electric detonator

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-62-134500 (JP, A) JP-A-6-159999 (JP, A) JP-A-5-296696 (JP, A) JP-A-5- 79797 (JP, A) JP-B 63-18120 (JP, B2) JP-A 62-503183 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F42D 1/00 F42B 3 / 00

Claims (4)

(57) [Claims] 1. A blasting energy supplier and electric energy supplied simultaneously from the blasting energy supplier are charged, and the charged electrical energy is after a delay time that can be set arbitrarily based on the start time of the charging. And at least two second time setting devices for supplying different electronic delay electric detonators, and the slowest delay time set in each of the second time setting devices is set to all the electronic delay electric detonators. An electric blasting device, characterized in that it is shorter than the shortest delay time given. 2. The second time setting device, a capacitor for charging the electrical energy from the blast energy supply device,
Delay time setting means capable of arbitrarily setting a delay time based on the start time of charging of the electric energy to the capacitor, and charging the capacitor after the delay time set by the delay time setting means Means for supplying the generated electrical energy to an electronic delayed electric detonator. 3. The electric blasting device according to claim 2, wherein the delay time setting means has a preset digital counter capable of setting a counting end point. 4. The blasting energy supplier simultaneously supplies electrical energy to at least two second setting devices, and the electrical energy supplied from the blasting energy supplier in each of the at least two second setting devices. From each of the at least two time setting devices to another electronic delay electric detonator, and the charged electric power after a delay time that can be arbitrarily set based on the start time of the charging. When supplying the energy to start the detonation, the electronic delay electric detonator to be detonated first among the electronic delay electric detonators is the slowest set by the at least two time setting devices before the timing to detonate. An electric blasting method characterized by ending the delay time.