Method for improving detonation reliability of detonator

Abstract

The invention relates to a method for increasing detonating reliability of a detonator, the method is realized by adding double ignition heads in the detonator, the detonator comprises a detonator body, a controller, an ignition mechanism and a power supply, the detonator body comprises a detonator shell, and an initiating explosive, a booster explosive and a high explosive which are sequentially arranged in the detonator shell, the initiating explosive is provided with the ignition heads, and the booster explosive is provided with the ignition heads. The ignition head comprises a resistance wire buried in the initiating explosive and a blasting fuse with one end buried in the initiating explosive, and the controller is used for controlling the power supply to supply power to the electric heating wire. The invention aims to provide the method for improving the detonating reliability of the detonator, which is good in detonating reliability and is used for improving the detonating reliability of the electronic detonator.

Description

Technical Field

[0001] This invention relates to the field of electronic detonator technology, and in particular to a method for increasing the reliability of detonator detonation. Background Technology

[0002] Electronic detonators, also known as digital detonators or digital intelligent detonators, are essentially ordinary instantaneous detonators with external electronic control circuitry.

[0003] Research on electronic detonators began in the early 1980s, and in the 1990s, electronic detonators and their initiation systems experienced rapid development, gradually maturing and becoming practical for blasting engineering. The most mature electronic detonator development is achieved with the i-Kon™ electronic detonator initiation system produced by Orica of Australia; digital electronic detonators from Asahi Kasei of Japan and electronic detonators from AEL of Africa are also widely used in engineering blasting operations.

[0004] Existing electronic detonators generally have the following shortcomings: during detonation (which is achieved by heating the gunpowder inside the detonator), the phenomenon of unsuccessful detonation is prone to occur. Therefore, it is necessary to improve the reliability of electronic detonator detonation. Summary of the Invention

[0005] The present invention aims to provide a method for improving the detonation reliability of detonators, thereby enhancing the detonation reliability of electronic detonators.

[0006] The above technical problems are solved by the following technical solution: A method to increase the reliability of detonator detonation, characterized by adding a double ignition head inside the detonator. The detonator includes a detonator body, a controller, an ignition mechanism, and a power supply. The detonator body includes a detonator casing and, sequentially arranged inside the casing, an initiating explosive, a propagating explosive, and a high explosive. The initiating explosive is equipped with an ignition head, which includes a resistance wire embedded in the initiating explosive and a fuse with one end embedded in the initiating explosive. The controller is used to control the power supply to power the heating wire. When the detonator is detonated, power is simultaneously supplied to the resistance wire and the fuse is ignited, improving the reliability of detonator detonation. The ignition mechanism is used to ignite the fuse; the power supply is connected to the resistance wire while the ignition mechanism ignites the fuse. Automatic ignition of the fuse is achieved. (The last sentence is a repetition of the first paragraph and can be omitted.)

[0007] Preferably, the controller includes an initiation switch, a closing drive mechanism, a plug, and a socket mounted on the detonator body. The socket has two socket holes, and each end of the resistance wire has a conductive pin, with the two conductive pins corresponding to each other in the two socket holes. The plug has two insulating pins, and the end faces of the insulating pins have two plug holes. A conductive sleeve is provided in each plug hole, and the conductive sleeve is used to connect to the power source. The closing drive mechanism is used to drive the plug to close to the socket to a set position when the initiation switch is activated. The surface of the socket has a recess, and one end of the fuse is located in the recess. The ignition mechanism includes a lighter that can ignite the fuse at one end of the recess, and a pressing block that drives the pressing head of the lighter. The pressing block is connected to the plug. When the plug closes to the socket to the set position, the conductive sleeve is fitted onto the conductive pin, allowing the power source to supply power to the resistance wire. The pressing block presses down on the pressing head to ignite the lighter. A technical solution was provided to simultaneously activate and detonate the detonator using both the fuse and the resistance wire.

[0008] Preferably, in the initial state, the insulating pin is inserted into the socket hole of the receptacle, and the conductive pin passes through the socket hole of the plug. They are pre-inserted together without being energized, ensuring reliable connection when the socket and plug are closed. No additional complex guiding structure is required.

[0009] Preferably, the closing drive mechanism includes a permanent magnet disposed on the socket and an electromagnet disposed on the plug. When the detonation switch is activated, the electromagnet is energized by the power supply. The structure is simple.

[0010] Preferably, the ferromagnet is disposed at the bottom end of the socket hole, and the electromagnet is disposed on the insulating pin. This provides better concealment, and the force exerted on the ferromagnet is greater for a given magnet size.

[0011] Preferably, the socket has a channel connecting the two conductive pins. Each conductive pin has a small-diameter section, and an insulating sleeve is fitted onto this section. The outer diameter of the insulating sleeve is equal to the outer diameter of the conductive pin. The channel is aligned with the insulating sleeve. A conductive ring is fitted onto each conductive pin, and this ring is supported within the socket's insertion hole by a compression spring. The conductive rings on the two conductive pins are connected together by a conductive rod. Initially, the conductive ring is positioned above the insulating sleeve. When the plug is closed into the socket to a set position, the conductive ring is pressed against the insulating sleeve by the insulating pin, and the compression spring stores energy. When the plug and socket are not closed and the detonator is detonated, the resistance wire is in a short-circuit state, preventing accidental fire and ensuring good safety.

[0012] Preferably, the fuse includes an outer tube and gunpowder filled within the outer tube. The outer tube has several spherical pits distributed along its extension direction, and the gunpowder fills all the spherical pits. This allows for intermittent, minor explosions during combustion propulsion, preventing the fuse from going out.

[0013] Preferably, the initiating explosive and the detonating explosive are separated by a first combustion plate, and the detonating explosive and the high explosive are separated by a second combustion plate. This provides good reliability for detonation transmission between the three explosion zones of the detonator.

[0014] Preferably, the first combustion plate contains a plurality of detonating balls, each comprising a shell made of flame-retardant paper and white phosphorus filled within the shell. The shell also contains a vertically delayed rod that delays along the distribution direction of the initiating and propagating explosives, with pointed ends at both ends. This improves the reliability of igniting the propagating explosive during the detonation of the initiating explosive. This method ensures good safety when not detonating, while ensuring reliable ignition of the white phosphorus during an explosion.

[0015] Preferably, the cross-sectional area of ​​the rod is smaller than the cross-sectional area of ​​the tip at its maximum. This facilitates the release of white phosphorus from the puncture hole when the tip pierces the flame-retardant paper.

[0016] Preferably, the surface of the first incendiary disc on the side of the initiating explosive is provided with combustion-supporting fibers. This ensures that the first incendiary disc is more reliably ignited during the detonation of the initiating explosive.

[0017] Preferably, the end of the fuse located outside the detonator casing is wrapped with an ignition head made of gunpowder. This makes the fuse easier and faster to ignite.

[0018] The present invention has the following advantages: the detonator has good reliability in detonation; and the internal transmission of detonation within the detonator has good reliability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the initial state of the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A; Figure 3 for Figure 1 A magnified view of a portion of point B; Figure 4 for Figure 1 A magnified view of a portion at point C; Figure 5 This is a cross-sectional view of the fuse; Figure 6 This is a schematic diagram of the present invention when the plug is closed onto the socket to the set position; Figure 7 for Figure 6 A magnified view of a portion of point E; Figure 8 for Figure 6 A magnified view of a portion of point F; Figure 9 This is the circuit diagram of the present invention.

[0020] In the diagram: 1. Detonator casing; 2. Initiating explosive; 3. Detonating charge; 4. High explosive; 12. Power supply; 13. Resistance wire; 14. Ignition fuse; 15. Ignition mechanism; 16. Detonation switch; 17. Plug; 18. Socket; 19. Socket socket hole; 20. Conductive pin; 21. Insulating pin; 22. Conductive sleeve; 23. Recess; 24. Lighter; 25. Lighter press head; 26. Press block; 27. Permanent magnet; 28. Electromagnet; 29. ​​Channel; 30. Insulating sleeve; 31. Conductive ring; 32. Compression spring; 33. Conductive rod; 34. Outer tube; 35. Gunpowder; 36. Spherical pit; 37. First combustion plate; 38. Second combustion plate; 39. Boosting ball; 40. Spherical shell; 41. White phosphorus; 42. Rod body; 43. Point; 44. Combustion-supporting fluff; 45. Ignition head; 46. Power supply. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] See Figures 1 to 9 A method to increase the reliability of detonator detonation is achieved by adding a double igniter inside the detonator. The detonator includes a detonator body, which includes a detonator casing 1 and an initiating explosive 2, a propagating explosive 3, and a high explosive 4 sequentially arranged inside the detonator casing. The initiating explosive is equipped with an igniter.

[0023] It also includes a controller and a power supply 12. The ignition head includes a resistance wire 13 embedded in the detonator and a fuse 14 with one end embedded in the detonator. The controller is used to control the power supply 46 to supply power to the heating wire. It also includes an ignition mechanism 15, which is used to ignite the fuse. The ignition mechanism ignites the fuse when the power supply is connected to the resistance wire. The controller includes a detonation switch 16, a closing drive mechanism, a plug 17, and a socket 18 mounted on the detonator body. The socket has two socket holes 19, and each end of the resistance wire has a conductive pin 20, with the two conductive pins corresponding to each other in the two socket holes. The plug has two insulating pins 21, with two plug holes on the end faces of the insulating pins. A conductive sleeve 22 is provided in the plug hole, which is used to connect to a power source. The closing drive mechanism is used to drive the plug to close to the socket to a set position when the detonation switch is activated. The surface of the socket has a recess 23, with one end of the fuse located in the recess. The ignition mechanism includes a lighter 24 that can ignite the fuse at the recessed end, and a pressing block 26 that drives the pressing head 25 of the lighter. The pressing block is connected to the plug. When the plug closes to the socket to the set position, the conductive sleeve is fitted onto the conductive pin, allowing the power source to supply power to the resistance wire. The pressing block presses down on the pressing head to ignite the lighter. In the initial state, the insulating pin is inserted into the socket hole, and the conductive pin passes through the plug hole. The closing drive mechanism includes a permanent magnet 27 on the socket and an electromagnet 28 on the plug. When the detonation switch is activated, the electromagnet is energized by the power supply. The ferromagnet is located at the bottom of the socket hole, and the electromagnet is located on the insulating pin. The socket has a channel 29 connecting the two conductive pins. The conductive pin has a small diameter section, and an insulating sleeve 30 is fitted on the small diameter section. The outer diameter of the insulating sleeve is equal to the outer diameter of the conductive pin. The channel is also aligned with the insulating sleeve. A conductive ring 31 is fitted on the conductive pin. The conductive ring is supported in the socket hole by a compression spring 32. The conductive rings on the two conductive pins are connected together by a conductive rod 33. In the initial state, the conductive ring is located above the insulating sleeve. When the plug is closed to the socket to the set position, the conductive ring is pressed onto the insulating sleeve by the insulating pin, and the compression spring stores energy.

[0024] The fuse includes an outer tube 34 and gunpowder 35 filled inside the outer tube. The outer tube contains several spherical pits 36 distributed along its extension direction, and the gunpowder fills these pits. The initiating and propagating explosives are separated by a first incendiary plate 37, and the propagating and high explosives are separated by a second incendiary plate 38. The first incendiary plate contains several detonating balls 39, each comprising a shell 40 made of flame-retardant paper and white phosphorus 41 filled inside the shell. The shell also contains a vertically extending rod 42, extending along the distribution direction of the initiating and propagating explosives, with pointed ends 43 at both ends. The cross-sectional area of ​​the rod is smaller than the maximum cross-sectional area of ​​the pointed ends. The surface of the first incendiary plate on the side facing the initiating explosive is provided with combustion-supporting fibers 44. One end of the fuse outside the detonator casing is wrapped with a gunpowder-made ignition head 45.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the invention. Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A method for increasing the reliability of detonator detonation, characterized in that, This is achieved by adding dual ignition heads inside the detonator. The detonator includes a detonator body, a controller, an ignition mechanism, and a power supply. The detonator body includes a detonator casing and, sequentially arranged within the casing, an initiating explosive, a propagating explosive, and a high explosive. The initiating explosive is equipped with an ignition head, which includes a resistance wire embedded within the initiating explosive and a fuse with one end embedded within the initiating explosive. The controller controls the power supply to power the heating wire. When the detonator is detonated, power is simultaneously supplied to the resistance wire and the fuse is ignited, improving the reliability of detonation. The ignition mechanism ignites the fuse simultaneously with the connection of the power supply to the resistance wire.

2. The method for increasing the reliability of detonator detonation according to claim 1, characterized in that, The controller includes an initiation switch, a closing drive mechanism, a plug, and a socket mounted on the detonator body. The socket has two socket holes, and each end of the resistance wire has a conductive pin, with the two conductive pins corresponding to each other within the two socket holes. The plug has two insulating pins, each with two plug holes on its end face. A conductive sleeve is located within each plug hole, and the conductive sleeve is used to connect to the power source. The closing drive mechanism drives the plug to close to the socket to a set position when the initiation switch is activated. The socket surface has a recess, and one end of the fuse is located within the recess. The ignition mechanism includes a lighter that allows the flame to reach the fuse located at the recess end when ignited, and a pressing block that drives the lighter's pressing head. The pressing block is connected to the plug. When the plug closes to the socket to the set position, the conductive sleeve is fitted onto the conductive pin, allowing the power source to supply power to the resistance wire. The pressing block presses down on the pressing head to ignite the lighter.

3. The method for increasing the reliability of detonator detonation according to claim 2, characterized in that, In the initial state, the insulating pin is inserted into the socket hole of the socket part, and the conductive pin passes through the socket hole of the plug part.

4. A method for increasing the reliability of detonator detonation according to claim 2 or 3, characterized in that, The closing drive mechanism includes a permanent magnet disposed on the socket and an electromagnet disposed on the plug. When the detonation switch is activated, the electromagnet is connected to the power source and energized.

5. A deep-earth electronic detonator impact monitoring system according to claim 2 or 3, characterized in that, The socket has a channel connecting the two conductive pins. Each conductive pin has a small diameter section, and an insulating sleeve is fitted onto the small diameter section. The outer diameter of the insulating sleeve is equal to the outer diameter of the conductive pin. The channel is aligned with the insulating sleeve. A conductive ring is fitted onto the conductive pin, and the conductive ring is supported in the socket hole by a compression spring. The conductive rings on the two conductive pins are connected together by a conductive rod. In the initial state, the conductive ring is located above the insulating sleeve. When the plug is closed onto the socket to the set position, the conductive ring is pressed onto the insulating sleeve by the insulating pin, and the compression spring stores energy.

6. A method for increasing the reliability of detonator detonation according to claim 1, 2, or 3, characterized in that, The fuse includes an outer tube and gunpowder filled inside the outer tube. The outer tube has a plurality of spherical pits distributed along the extension direction of the outer tube, and the gunpowder fills the spherical pits.

7. A method for increasing the reliability of detonator detonation according to claim 1, 2, or 3, characterized in that, The initiating explosive and the detonating explosive are separated by a first combustion plate, and the detonating explosive and the high explosive are separated by a second combustion plate. The first combustion plate contains a plurality of detonating balls, each of which includes a shell made of flame-retardant paper and white phosphorus filled inside the shell. The shell also contains a vertically delayed rod that delays along the distribution direction of the initiating explosive and the detonating explosive, and the rod has pointed ends at both ends.

8. A method for increasing the reliability of detonator detonation according to claim 7, characterized in that, The cross-sectional area of ​​the rod is smaller than the cross-sectional area at the maximum point of the tip.

9. A method for increasing the reliability of detonator detonation according to claim 7, characterized in that, The surface of the first combustion piece located on the side of the detonator is provided with combustion-supporting fibers.

10. A method for increasing the reliability of detonator detonation according to claim 1, 2, or 3, characterized in that, The fuse is located at one end outside the detonator casing, with an ignition head made of gunpowder wrapped around it.

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