JP2005049006A - Ignition method and igniter for a detonator with a lead tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control an interval between two metal electrodes is difficult or requires a complicated mechanism in an ignition method using electric sparks. In addition, even if the metal electrode 2 poles can be adjusted to an appropriate interval, if ignition is repeated, the combustion residue generated when the soot or spark tube after spark discharge is ignited adheres to the electrode and sparks are emitted. Will not be able to ignite explosive or reactive substances placed in the conduit.
In a method for igniting a detonator with a conducting tube in which an explosive or other reactive substance is coated in a tube, charging / discharging means for discharging a capacitor at a predetermined time after charging a predetermined voltage; The charging voltage comprises: means for receiving the discharge voltage; and two metal wires electrically connected to the power receiving means, wherein at least one of the metal wires is electrically insulated except for a tip, and the charge / discharge means Spark generating means for generating a spark from the ends of the two metal wires by the voltage received from the battery, and the spark generating means is inserted into the tube for ignition.
[Selection] Figure 1

Description

  The present invention relates to a method and an igniter for igniting a detonator with a lead tube.

  Regarding the detonator with a lead tube, in Patent Document 1 or Patent Document 2, as a lead wire for energy transmission for detonating the detonator, the reaction started at one end is maintained by an almost explosive region or other reactive substance. A small amount of explosive or other reactive substance is coated in the envelope (synthetic resin tube) so that a continuous gas propagation path that propagates in the form of a gas shock wave having high temperature and high speed is formed inside. A fire guide has been proposed. According to this technique, by detonating one end of the conduit with a detonator capable of electrically detonating, for example, an ignition shock is propagated at 2,000 m per second, and the detonator attached to the other end of the conduit Can detonate.

  Moreover, in patent document 3 and patent document 4, the connection apparatus of the said light guide pipe comprised from the non-explosive connection part which receives the entrance end and exit end of the said heat guide pipe, and the ignition member which propagates and reinforces ignition Has been proposed. The non-explosive connection part is configured to receive one or more conduits, and the ignition member is composed of a plastic connection block in which an explosive is inserted, or a delay detonator to which the conduit is attached. Is done. According to this conduit connection device, by igniting the first one detonator with a conduit for ignition, ignition can be propagated to a plurality of detonators with a conduit. It can be used for blasting work to detonate.

  For the ignition of the first detonator with a blast tube for starting the blasting operation, a method in which an electric detonator is attached to the end of the blast tube of the detonator with the above-mentioned blast tube and the electric detonator is detonated is used. It was done. As another method, in Example 6 of Patent Document 1, the end portion of the heat guide tube is cut and opened, and the gap between the metal electrodes 2 poles is adjusted and inserted into the opened fire guide tube. Thus, a technique is disclosed in which electric energy boosted and charged in a capacitor is ignited by an electric spark generated by discharging between the metal electrodes. Further, according to Patent Document 5, there is proposed a technique for reliably generating an electric spark by arbitrarily controlling the interval between the two metal electrodes.

Further, according to Patent Document 6, an electric bridge is arranged near the end of an open conduit, and a line explosion is caused by passing a large current through the bridge. A technique for igniting is proposed. According to the ignition technique based on the linear explosion, it is disclosed that continuity can be confirmed before ignition and ignition can be performed with a relatively low voltage or electric energy. According to the technique of Patent Document 6, it is not necessary to extend the igniter tube from the loading position of the explosives to the ignition station, and unnecessary waste material (synthetic resin tube for the igniter tube) is not generated. Therefore, it can be configured at a low cost.
In the ignition technology of a detonator with a detonator for the start of ignition, a method for detonating the electric detonator by attaching an electric detonator to the end of the detonator of the detonator with a detonator is a metal mine. Such as stray current or lightning strike, there is a concern about the occurrence of ground fault current, the possibility of erroneous explosion cannot be denied, and it cannot be used when electrical initiation is difficult.

Further, in the techniques of Patent Document 1, Patent Document 5, etc., it is difficult to control the distance between the two metal electrodes, or a complicated mechanism is required. In addition, even if the metal electrode 2 poles can be adjusted to an appropriate interval, if ignition is repeated, the combustion residue generated when the soot or spark tube after spark discharge is ignited adheres to the electrode and sparks are emitted. However, there is a problem that it becomes impossible to ignite the explosive or reactive substance arranged in the fire guide pipe.
In the technique of Patent Document 6, since the electric bridge that is the source of the line explosion is not arranged in the conduit, it is necessary to arrange the open end of the conduit in the range covered by the line explosion energy. Deviation in the mounting position of the fire tube, or the reactive substance applied to the inner wall of the open end of the guide tube may fall off or absorb moisture, etc. There is a risk.

The explosive or reactive element disposed in the light guide tube by cutting and opening the end of the light guide tube, inserting a coaxial discharge gap end into the open end, and causing a spark discharge between the discharge gaps. According to the method of igniting the material, it is necessary to extend the light guide tube to a safe place to perform the ignition operation, which is economically expensive, and is a remnant of the light guide tube that has been especially extended after ignition. The synthetic resin tube remains as waste and is not environmentally preferable. Incidentally, in tunnel blasting and the like, it is common to take a safety distance of about 100 m to 200 m from the face to the ignition station, which is very long.
Further, the discharge gap may cause the electrode to be worn out by spark discharge, or soot and combustion residue may adhere, but if the ignition operation is repeated, the wear and adhesion will accumulate, and a spark will be produced, but it will be placed in the previous guide tube. There is a problem that the explosive or reactive substance that cannot be ignited.

Japanese Patent Publication No.49-12699 JP-A-5-238865 Japanese Patent Publication No. 52-21047 JP 51-104015 A JP-A-57-111295 Japanese Patent Publication No. 4-29636

  An object of the present invention is to provide a reliable and practical method for igniting a detonator with a lead tube and an igniter.

The present invention is as follows.
1) In the ignition method of a detonator with a conducting tube in which an explosive substance or other reactive substance is coated in the tube, the capacitor is charged with a predetermined voltage and then discharged by charging / discharging means that discharges at an arbitrary time. The electric energy received by the power receiving means is composed of two metal wires electrically connected to the power receiving means, and at least one of the metal wires is electrically insulated except for the tip, and the charge / discharge A method for igniting a detonator with a lead tube, characterized in that a spark generating means for generating a spark from the ends of the two metal wires by means of a voltage received from the means is inserted into the tube and ignited.
2) The method for igniting a detonator with a lead tube according to 1), wherein the two metal wires are formed in a ground wire state and the conductive tips are close to each other.
3) The method for igniting a detonator with a lead tube according to 1) or 2), wherein the two metal wires are enameled wires.

4) The two metal wires consist of one stainless steel wire and one enameled wire, and are formed by winding the enameled wire around the stainless steel wire, and the conductive tip is in proximity. 1) A method for igniting a detonator with a lead tube according to 1).
5) The method for igniting a detonator with a lead tube according to any one of 1) to 4), wherein the charging / discharging means is a detonator for an electric detonator.
6) An igniter for a detonator with a conducting tube in which an explosive substance or a reactive substance is applied in a tube, and a power receiving means for receiving a voltage, and two pieces electrically connected to the power receiving means It comprises a metal wire, and at least one of the metal wires is electrically insulated except for the tip, and has a spark generating means for generating a spark from the tip of the two metal wires by the received voltage. Detonator igniter with a lead tube.

7) The detonator igniter with a lead tube according to 6), wherein the two metal wires are formed in a ground wire state and the conductive tips are close to each other.
8) The detonator igniter with a lead tube according to 6) or 7), wherein the two metal wires are enamel wires.
9) The two metal wires are composed of one stainless steel wire and one enameled wire, and are formed by winding the enameled wire around the stainless steel wire, and the conductive tips are in close proximity. A detonator igniter with a lead tube as described in 6).

According to the detonator ignition method and igniter of the present invention, since the ignition device has a lead wire, it can be connected to the blasting busbar, and the blasting busbar can be used. It has the effect that a safe blasting operation can be performed with a suitable length of the guide pipe without extending to a safe place far away for performing the ignition operation. In addition, there is no electrical continuity, and the safety against an electrical failure that may occur at the site where blasting work is concerned, such as leakage current, is improved.
Moreover, according to the igniter of the detonator with a lead tube of the present invention, the two metal wires as the spark generating means are formed in the lead wire state, and the lead wire state is obtained by twisting the two enamel wires, for example. The distance between the gaps for the spark discharge can be stably and easily configured by cutting the ground wire with an appropriate length, so that the reliability of the spark discharge can be improved. Furthermore, after once used, a new discharge gap can be created by recutting the tip of the base wire, and the combustion residue attached by ignition can be easily removed.

In addition, since the igniter of the present invention can be configured at a relatively low cost, it can be made disposable only once, and thus has an effect of performing a highly reliable ignition work.
Further, according to the ignition of the light guide tube by the igniter of the present invention, there is no damage to the outside at the time of ignition. Therefore, unlike the start of ignition of the light guide tube by the electric detonator, There is no damage to other adjacent conduits due to explosion fragments.

The present invention will be described focusing on the best mode. Hereinafter, a specific description will be given with reference to FIGS. 1, 2, and 3.
Embodiment 1 FIG. 1 is a schematic diagram showing an example of a method for igniting a detonator with a lead tube of the present invention.
The first detonator 5 with a lead tube for starting ignition is connected to the igniter 1 via the lead tube 4. The igniter 1 is a detonator igniter with a lead tube constituting the present invention. The length of the light guide tube 4 can be determined to an arbitrary length.
The igniter 1 is connected to the blast bus 3 and connected to the igniter 2. The igniter 2 may be constituted by an electric detonator blaster. Further, an auxiliary leg line may be provided between the igniter 1 and the blast bus 3.
The igniter 2 charges the voltage necessary for the spark discharge of the igniter 1 and discharges it at an arbitrary timing, so that the igniter 1 sparks discharge, and the combined guide tube 4 is ignited to detonate the detonator 5. Configured to do.

[Embodiment 2] Fig. 2 is a schematic diagram showing an example of a detonator igniter 1 with a lead tube of the present invention.
The lead wires 11 (a) and (b) pass through the inside of the synthetic resin plug 14 and are electrically coupled to the lead wires 12 (a) and (b). Further, 11 (a) and (b) are coated from at least the portion from the synthetic resin plug 14 to near the end.
The lead wires 12 (a) and (b) are electrically coupled to the first and second discharge metal wires 21 and 22. In addition, at least one of the lead wire first discharge metal wires 21 and 22 is an enameled wire, and the terminal insulating film is removed and connected to the lead wire 12. As a connection method, methods such as soldering, ultrasonic welding, and spot welding can be used. In the case of this embodiment, the first and second discharge metal wires 21 and 22 are twisted to form a ground wire. In the case of connecting by soldering, it is possible to carry out without removing the terminal insulating film by using a resin such as urethane, formal, polyester, ester imide, amideimide, polyimide, etc. as the material of the insulating film. The material of the conductor that is the core wire of the enameled wire is copper, piano wire, brass wire, brass wire, nickel wire, nickel chrome wire, copper clad aluminum wire, aluminum wire, steel wire, resistance wire, superconducting wire, etc. It is.

The maximum outer diameter of the ground wire is configured to be a size that can be inserted into the conduit. In general, the inner diameter of the tube tube is as small as 1 mm. Therefore, the wire diameters of the first and second discharge metal wires 21 and 22 are preferably 0.5 mm or less, more preferably 0.4 mm or less. More preferably, it is 0.23 mm to 0.35 mm from the ease of insertion and the autonomy of the ground wire structure. Moreover, the terminal of the 1st and 2nd metal wires 21 and 22 for discharge is open | released, and the suitable discharge gap is formed. The length of the ground wire is preferably slightly longer than the case 16 so that it can be easily inserted into the fire guide tube 4.
In the tube of the fire guide tube 4, the lead wires of the first and second discharge metal wires 21 and 22 are inserted into the hollow portion, and the outside is stably held by the holding pipe 17. Furthermore, by filling the back portion of the holding pipe 17 with the stop resin 18, it can be configured so as not to impair the shape of the first and second discharge metal wires 21 and 22 even if forcibly protruding. In addition, the holding pipe 17 may be divided into a portion that fills the stop resin 18 and a portion that holds the igniter tube 4 for ease of manufacture.

For example, as shown in FIG. 2, the synthetic resin plug 14 preferably has a shape having a three-stage outer diameter, and can have a structure in which the leading edge of the third stage is the smallest and is coupled to the holding pipe 17. Protruding portions 15 can be provided at the forefront portion to make the connection with the holding pipe 17 appropriate and easy.
The case 16 has an inner diameter that can be easily joined to the outer diameter of the second stage of the synthetic resin plug 14, and the outer diameter of the first stage of the resin plug 14 is determined according to the thickness of the case 16. It is preferable that the plug 14 be configured to have a flat shape. The case 16 may be formed of a resin pipe and may be configured to be bonded and fixed to the resin plug 14. For example, the case 16 may be formed of a thin metal pipe such as aluminum or copper, and the resin plug 14 may be fastened and fixed as a core material. You may comprise as follows.

The holding pipe 17 preferably has an outer diameter that can be easily joined to the inner diameter of the case 16, but a spacer may be interposed between them when an appropriate material cannot be obtained.
The fire guide tube 4 is held by the holding pipe 17 as described above, but is preferably fixed to the case 16 with vinyl tape or the like after insertion in order to prevent dropping.

[Embodiment 3] Fig. 3 is a schematic diagram showing another embodiment of the detonator igniter 1 with a lead tube of the present invention.
The difference from the igniter of the second embodiment is that the shape of the discharge metal wires 21 and 22 and the tube stop projection 19 are provided inside the holding pipe 17 instead of the stop resin 18.
The first discharge metal wire 21 is made of, for example, a stainless steel wire having a diameter of 0.3 mmφ, and the second discharge metal wire 22 is made of, for example, an enamel wire having a diameter of 0.28 mmφ. In the case of this embodiment, an enameled wire 22 is wound around a straight stainless steel wire 21. The winding position may be only in the vicinity of the tip, and by making it slightly longer and cutting it at an appropriate length, the conductive portion of the enameled wire 22 is exposed, and an appropriate gap interval is easy to generate an electric spark. Can be configured.

The present invention will be described based on examples.
Various conditions were changed by the method of Embodiment 1 using the igniter 1 of Embodiment 2 or 3, and the detonator with a lead tube was ignited, and the results shown in Table 1 were obtained.
[Example 1]
When the igniter 1 and the igniter tube 4 were combined in the manner shown in FIG. 2 and the electric energy of a 100-shot detonator (capacitance 8 μF, charging voltage 600 V) for an electric detonator was applied, all ignition was possible.

[Example 2]
Connect the igniter 1 and the igniter tube 4 as shown in Fig. 2, and apply the electrical energy of a 300-shot detonator (capacitance 20μF, charging voltage 600V) for an electric detonator through a blast bus (100m). I was able to ignite everything.

[Example 3]
Connect the igniter 1 and the igniter tube 4 as shown in Fig. 2 and apply the electrical energy of a 300-shot detonator (capacitance 20μF, charging voltage 600V) for an electric detonator through a blast bus (200m). I was able to ignite everything.

[Example 4]
When the igniter 1 and the igniter tube 4 were connected in the manner shown in FIG. 3 and the electric energy of a 100-shot detonator (capacitance 8 μF, charging voltage 600 V) for an electric detonator was applied, all of the components could be ignited.

[Example 5]
Connect the igniter 1 and the igniter tube 4 as shown in Fig. 3, and apply the electrical energy of a 300-shot detonator (capacitance 20μF, charging voltage 600V) for an electric detonator through a blast bus (100m) I was able to ignite everything.

[Example 6]
Connect the igniter 1 and the igniter tube 4 as shown in Fig. 3, and apply the electrical energy of the 300-shot detonator (capacitance 20μF, charging voltage 600V) for the electric detonator through the blast bus (200m). I was able to ignite everything.

  The method for igniting a detonator with a lead tube and a fire tube igniter according to the present invention can be suitably used in the field of blasting work using a detonator with a lead tube.

The schematic diagram which shows an example of the detonator ignition method with a conducting tube of this invention. The schematic diagram which shows an example of the detonator igniter with a conducting tube of this invention. The schematic diagram which shows the example of the other detonator igniter with a fire guide of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Igniter 2 Ignition device 3 Blast bus 4 Fire tube 5 Detonator 11 (a), (b) Lead wire 12 (a), (b) Lead wire 13 Lead wire coating part 14 Synthetic resin plug 15 Protrusion 16 Case 17 Holding pipe 18 Stopping resin 19 Tube stopping protrusion 21 First discharge metal wire 22 Second discharge metal wire

Claims (9)

  In a method of igniting a detonator with a lead tube in which an explosive substance or other reactive substance is coated in a tube, the capacitor is charged by a charging / discharging means that discharges at an arbitrary time after charging a predetermined voltage. Electric power is received by the power receiving means, and consists of two metal wires that are electrically connected to the power receiving means. At least one of the metal wires is electrically insulated except for the tip, and the charge / discharge means A method for igniting a detonator with a lead tube, characterized in that a spark generating means for generating a spark from the ends of the two metal wires by means of a received voltage is inserted into the tube and ignited.   2. The method for igniting a detonator with a lead tube according to claim 1, wherein the two metal wires are formed in a ground wire state and the conductive tips are close to each other.   The method for igniting a detonator with a lead tube according to claim 1 or 2, wherein the two metal wires are enamel wires.   The two metal wires are composed of one stainless steel wire and one enameled wire, and are formed by winding the enameled wire around the stainless steel wire, and the conductive tips are close to each other. The method for igniting a detonator with a lead tube according to claim 1.   The method for igniting a detonator with a lead tube according to any one of claims 1 to 4, wherein the charging / discharging means is a detonator for an electric detonator.   A detonator with a conducting tube in which an explosive substance or a reactive substance is applied in a tube, a power receiving means for receiving voltage, and two metal wires electrically connected to the power receiving means And at least one of the metal wires is electrically insulated except for the tip, and has a spark generating means for generating a spark from the tips of the two metal wires by the received voltage. Detonator igniter with fire tube.   The detonator igniter with a lead tube according to claim 6, wherein the two metal wires are formed in a ground wire state, and the conductive tips are close to each other.   The detonator igniter with a lead tube according to claim 6 or 7, wherein the two metal wires are enamel wires.   The two metal wires are composed of one stainless steel wire and one enameled wire, and are formed by winding the enameled wire around the stainless steel wire, and the conductive tips are close to each other. The detonator igniter with a lead tube according to claim 6.

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