An electronic detonator without ignition powder
By using arc ignition technology in electronic detonators and using high-voltage pulses to generate arc ignition delay drugs, the problem of ignition powder being sensitive to static electricity is solved and the safety and reliability of the detonators are improved.
Patent Information
- Application Number
- CN202411812867.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-04-04
AI Technical Summary
The ignition powder in the electronic detonator is very sensitive to static electricity and has a safety hazard of static electricity causing accidental explosions.
Arc ignition technology is adopted to output high-voltage pulses through the arc starting module to generate arc ignition delay drugs, thereby achieving detonator detonator detonation.
It effectively replaces electrostatic sensitive ignition powder, improves the safety and reliability of the detonator, and avoids the risk of accidental explosion caused by static electricity.
Smart Images
Figure CN119756096A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electronic detonators, in particular to an electronic detonator without ignition powder. Background Art
[0002] Electronic detonators are devices that use electronic control technology to achieve detonation. Unlike traditional mechanical or chemical detonators, electronic detonators control the detonation time of explosives through built-in microprocessors and circuits, which can achieve very precise time control. This high-precision time control capability makes electronic detonators particularly useful in blasting projects because it can ensure that multiple detonators are accurately detonated in a predetermined time sequence, thereby improving blasting efficiency and safety.
[0003] The components of electronic detonators include: electronic control module, ignition bridge, primary explosive, main charge, communication module, etc. These components work together to ensure the safe and reliable operation of the electronic detonator and precise detonation control.
[0004] Since the ignition charge of electronic detonators is very sensitive to static electricity, strict safety measures need to be taken during handling and use to prevent accidental explosions caused by static electricity. Summary of the invention
[0005] The technical problem to be solved by the present invention is to provide an electronic detonator without ignition powder, so as to avoid the problem that static electricity affects the ignition powder.
[0006] In order to solve the above problems, the present invention provides an electronic detonator without ignition powder, comprising: a detonator body having a accommodating cavity, in which an explosive, a first delaying agent, and a second delaying agent are arranged in contact with each other in sequence, and two relative arc-starting plates are arranged at the position of the accommodating cavity where the second delaying agent is located, the arc-starting plates are connected to an arc-starting module, and the end of the accommodating cavity is sealed.
[0007] The ignition powder-free electronic detonator of the present invention adopts arc ignition technology to replace static-sensitive ignition powder, thereby improving the safety and reliability of the detonator.
[0008] Preferably, the arc starting plate and the arc starting module are connected via a wire.
[0009] Preferably, the arc starting module at least includes: a power supply module, an arc starting control circuit electrically connected to the power supply module, an arc control circuit electrically connected to the arc starting control circuit, and a high-voltage package electrically connected to the arc control circuit, and the high-voltage end of the high-voltage package is connected to the arc starting plate.
[0010] Preferably, the high-voltage package includes a primary coil and a secondary coil, the primary coil is electrically connected to the arc control circuit, and the secondary coil is connected to the arc starting plate.
[0011] Preferably, the coil boost ratio of the primary coil and the secondary coil of the high-voltage package is set so that the arc starting voltage of the high-voltage package after boosting is not less than 4.5 kV.
[0012] In order to provide a variety of power supply modes, preferably, the power supply module is a battery power supply module and / or a power supply module.
[0013] In order to improve the arc starting efficiency, preferably, the area where the arc starting plate contacts the second delay charge has a conical protrusion.
[0014] Preferably, the wire connection point of the arc starting plate extends to the outside of the detonator body.
[0015] The beneficial effects of the present invention are:
[0016] The electronic detonator without ignition powder of the present invention adopts an arc ignition scheme. When the detonator needs to be detonated, the arc starting module outputs a high-voltage pulse between the arc starting plates after receiving the detonation signal. Under the action of the high-voltage pulse, an arc is generated between the arc starting plates, and the arc ignites the second delaying agent. The second delaying agent is ignited, and the first delaying agent and the detonating agent are ignited in turn to complete the detonation. The electronic detonator without ignition powder of the present invention adopts the arc ignition technology to achieve the replacement of the electrostatically sensitive ignition agent, thereby improving the safety and reliability of the detonator. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model relates to an electronic detonator without ignition powder.
[0018] Figure 2 The invention discloses a schematic diagram of the circuit structure of an arc starting module in an electronic detonator without ignition powder.
[0019] Figure 3 The invention discloses a circuit diagram of an arc starting module in an electronic detonator without ignition powder.
[0020] Description of reference numerals:
[0021] 1. Detonator body; 2. Explosive charge; 3. Wire; 4. First delay charge; 5. Second delay charge; 6. Arc starting plate; 7. Arc starting module; 71. Power supply module; 72. Arc starting control circuit; 73. High voltage package. DETAILED DESCRIPTION
[0022] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0023] The present invention provides an ignition powder-free electronic detonator, which uses arc ignition, does not require ignition powder, eliminates the setting of ignition powder, and eliminates the safety hazard caused by static-sensitive ignition powder. The following is a detailed description of the specific implementation method of the invention to ensure that it is clear, accurate, complete and feasible.
[0024] like Figure 1 An electronic detonator without ignition powder of the present invention comprises: a detonator body 1 having a accommodating cavity, in which an explosive 2, a first delaying agent 4, and a second delaying agent 5 are arranged in sequence and in contact with each other, and arc-starting plates 6 are arranged at two positions in the accommodating cavity of the second delaying agent 5, and the arc-starting plates 6 are connected to an arc-starting module 7, and the two ends of the accommodating cavity are sealed.
[0025] In some embodiments of the present invention, the detonator body 1 is made of a high-strength, corrosion-resistant metal material, such as stainless steel or titanium alloy, to ensure that it can withstand the huge pressure generated during detonation and maintain structural integrity. A sealed receiving chamber is provided inside the detonator body for loading all internal components of the detonator.
[0026] The accommodating chamber can accommodate the initiating explosive 2, the first delaying agent 4, the second delaying agent 5 and the arcing plate 6. The initiating explosive is placed at the front end of the accommodating chamber and fits tightly against the inner wall of the detonator body 1. The first delaying agent 4 and the second delaying agent 5 are arranged in contact with each other in sequence and continuously behind the initiating explosive 2 to adjust the time delay between detonation and the main charge. The type and amount of the delaying agent 2 can be adjusted according to the specific blasting requirements. Two opposite arcing plates 6 are arranged at the position of the accommodating chamber where the second delaying agent 5 is located. The arcing plates 6 are made of metal materials with good electrical conductivity, such as copper or silver. A certain gap is formed between the arcing plates 6 to generate an arc. The arcing module 7 is connected to the arcing plate 6 to generate and control the generation of the arc. The arcing module 7 contains a boosting device and a control circuit, which can output a suitable high-voltage pulse as needed. The control circuit has precise time control and energy regulation functions to ensure that the arc can be generated at a predetermined time and energy.
[0027] The end of the accommodating cavity adopts a sealing structure to prevent harmful substances such as external moisture, dust and static electricity from entering the detonator. The sealing material should have good elasticity and corrosion resistance to ensure the durability of the sealing effect.
[0028] The working process of the present invention is as follows: when the detonator needs to be detonated, the arcing module 7 receives the detonation signal and outputs a high-voltage pulse between the arcing plates 6. Under the action of the high-voltage pulse, an arc is generated between the arcing plates, and the arc ignites the second delay charge 5, which in turn ignites the first delay charge 4 and the detonator 2 to complete the detonation.
[0029] In summary, the ignition powder-free electronic detonator of the present invention realizes the replacement of static-sensitive ignition powder by adopting arc ignition technology, thereby improving the safety and reliability of the detonator. At the same time, by optimizing the structure and sealing measures of the detonator body, the anti-static ability and environmental adaptability of the detonator are further enhanced.
[0030] Continue to refer to Figure 1 In order to fully utilize the arc starting module, in some embodiments, the arc starting plate is connected to the arc starting module through a wire.
[0031] The arc starting plate 6 and the wire 3 are connected by welding or crimping to ensure the firmness and conductivity of the connection point. At the same time, the other end of the wire 3 is connected to the secondary coil of the high voltage package 74 in the arc starting module 7.
[0032] Continue to refer to Figure 1 In some embodiments, the arc starting module 7 at least includes: a power supply module 71, an arc starting control circuit 72 electrically connected to the power supply module 71, an arc control circuit 73 electrically connected to the arc starting control circuit 72, and a high-voltage package 74 electrically connected to the arc control circuit 73, and the high-voltage end of the high-voltage package 74 is connected to the arc starting plate 6.
[0033] like Figure 2 In some embodiments, the arc starting module 7 is responsible for providing sufficient energy to generate an arc between the arc starting plates 6, thereby igniting the delay charge. The arc starting module includes at least the following key components:
[0034] Power supply module 71: The power supply module 71 is the energy source of the arc starting module, which can be a battery power supply module or a power supply module. The battery power supply module usually uses a high energy density battery, such as a lithium battery or a cadmium nickel battery, to ensure that sufficient power can be provided when needed. The power supply module supplies power to the arc starting module through an external power supply. Arc starting control circuit 72: The arc starting control circuit 72 is a micro control unit in the arc starting module, which is responsible for accurately controlling the arc starting time and the size of the arc starting current according to the preset blasting time. Arc control circuit 73: The arc control circuit 73 is a power amplifier unit in the arc starting module, which receives the control signal from the arc starting control circuit and amplifies it into sufficient current and voltage to drive the high-voltage package 74 to work. The selection of the arc control circuit needs to consider factors such as its current, voltage and heat dissipation capacity. High-voltage package 74: The high-voltage package 74 is responsible for boosting the voltage output by the arc control circuit to a sufficiently high level to ensure that sufficient arc can be generated between the arc starting plates to ignite the delay charge. The high-voltage package 74 usually includes components such as a primary coil and a secondary coil, and realizes voltage boosting through the principle of electromagnetic induction.
[0035] When the power supply module 71 provides electric energy to the arc starting module 7, the arc starting control circuit 72 sends a blasting signal to the arc control circuit 73 according to the preset blasting time and power control. After receiving the signal, the arc control circuit 73 amplifies it into sufficient current and voltage to drive the high-voltage package 74 to work. The high-voltage package 74 boosts the voltage to a sufficiently high level and transmits it to the arc starting plate 6 through the wire 3. An arc is generated between the arc starting plates 6, igniting the second delay charge 5, thereby triggering the blasting process of the entire detonator.
[0036] Continue to refer to Figure 1 In some embodiments, the high voltage package 74 includes a primary coil and a secondary coil, the primary coil is electrically connected to the arc control circuit, and the secondary coil is connected to the arc starting plate.
[0037] The primary coil is electrically connected to the arc control circuit 73, and it receives the amplified current and voltage from the arc control circuit 73. When the arc control circuit 73 receives the ignition signal from the arc starting control circuit 72 and amplifies it, the current in the primary coil will change accordingly, thereby generating an induced electromotive force in the secondary coil. The secondary coil is connected to the arc starting plate, which is responsible for boosting the induced electromotive force generated in the primary coil and transmitting it to the arc starting plate 6. The number of turns of the secondary coil is usually more than the number of turns of the primary coil to achieve voltage boosting. When the current in the secondary coil reaches a sufficiently large value, an arc will be generated between the arc starting plates, thereby igniting the delay charge.
[0038] Continue to refer to Figure 1 In some embodiments, the coil boost ratio of the primary coil and the secondary coil of the high-voltage package is set so that the arc starting voltage of the high-voltage package after boosting is not less than 4.5 kV, for example, boosting from 3.7 V to 4.5 kV.
[0039] In some embodiments, in order to ensure that enough electric arc can be generated between the arc starting plates to ignite the delay charge, it is necessary to set the coil boost ratio of the primary coil and the secondary coil of the high-voltage package. The coil boost ratio refers to the ratio between the output voltage of the secondary coil and the input voltage of the primary coil. In the present invention, the coil boost ratio is set so that the arc starting voltage of the high-voltage package after boosting is not less than 4.5kV. For example, if the voltage provided by the power supply module is 3.7V, it is necessary to boost the voltage to 4.5kV or higher by setting a suitable coil boost ratio. The coil boost ratio is calculated based on the required output voltage and the voltage provided by the power supply module. Coil boost ratio = required output voltage / power supply module output voltage = 4.5kV / 3.7V≈1216:1.
[0040] Specifically, in a specific embodiment, Figure 3, the power supply module 71 is the power supply unit of the arc starting module 7; when it is necessary to ignite the electronic detonator with an arc, the micro control unit outputs a high-frequency pulse signal, and the arc output control circuit controls the high-voltage package 74 to generate an arc for discharge;
[0041] like Figure 3 The arc control circuit 72 includes: a first diode D1, a second diode D2; a first resistor R1, a second resistor R2, a third resistor R3; a first capacitor C1, a second capacitor C2 and a third capacitor C3;
[0042] In the arc starting control circuit 72, the anode of the first diode D1 is connected to the anode of the power supply module, the cathode of the first diode D1 is connected to the P5 pin of the micro control unit, and a first resistor R1 is also arranged between the first diode D1 and the P5 pin; the anode of the second diode D2 is connected to the anode of the power supply module, the cathode of the second diode D2 is connected to the P1 pin of the micro control unit, and an inductor L1 is also arranged between the second diode D2 and the P1 pin; the first capacitor C1 and the second capacitor C2 are connected in parallel, one end of the second capacitor C2 is connected to the P1 pin of the micro control unit, and the other end is grounded; the second resistor R2 and the third resistor R3 are connected in series, the other end of the second resistor R2 is connected to the inductor L1, and the other end of the third resistor R3 is grounded; one end of the third capacitor C3 is connected to the cathode of the second diode D2, and the other end is grounded.
[0043] like Figure 3 The arc output control circuit 73 includes: a field effect tube M, a first transistor Q1 and a second transistor Q2; the P3 pin of the micro control unit is connected to the base of the first transistor Q1 and the second transistor Q2 through a fourth resistor R4, the emitters of the first transistor Q1 and the second transistor Q2 are connected to the gate of the field effect tube M, and a sixth resistor R6 is set between the emitters of the first transistor Q1 and the second transistor Q2 and the gate of the field effect tube M. The collector of the first transistor Q1 is connected to the positive electrode of the power supply module; the drain of the field effect tube M is connected to the primary coil of the high-voltage package 71, and the source of the field effect tube M is grounded. The P6 pin of the micro control unit is grounded.
[0044] For example: the microcontroller outputs a pulse signal with a frequency of 15K~21KHz to the field effect tube, and the secondary coil of the high-voltage package generates a high-voltage arc.
[0045] In the above embodiment, the microcontroller unit, i.e., MCU, may be selected from the STM32 series, MSP430 series, etc.
[0046] Continue to refer to Figure 1 In some embodiments, the area where the arc starting plate contacts the second delay agent has a conical protrusion.
[0047] In some embodiments, in order to improve arc starting efficiency and ensure that the delay charge can be reliably ignited, the area where the arc starting plate contacts the second delay charge is designed to have a conical protrusion. The design of the conical protrusion helps to generate more concentrated arc energy during arc starting, thereby making it easier to ignite the delay charge.
[0048] The shape of the conical protrusion can be a cone, a truncated cone or other similar conical structures. Its size and shape should be optimized according to the specific needs and working environment of the detonator to ensure the best arc starting effect and the ignition reliability of the delay charge.
[0049] The design of the conical protrusion makes the contact area between the arc starting plate and the second delay charge smaller and more concentrated, so that a higher arc temperature and energy density can be generated during arc starting. This helps to ignite the delay charge more easily and improves arc starting efficiency. Since the design of the conical protrusion makes the arc energy more concentrated, it can ensure that the delay charge is reliably ignited even in harsh working environments (such as high humidity, low temperature, etc.). This improves the reliability and stability of the detonator.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. An electronic detonator without ignition powder, characterized in that: include: A detonator body (1) is provided with a receiving cavity, wherein an explosive (2), a first delaying agent (4), and a second delaying agent (5) are arranged in sequence and in contact with each other in the receiving cavity of the detonator body (1), two opposite arc-starting plates (6) are arranged at the position of the receiving cavity where the second delaying agent (5) is located, the arc-starting plates (6) are connected to an arc-starting module (7), and the end of the receiving cavity is sealed.
2. The electronic detonator according to claim 1, characterized in that: The arc starting plate (6) and the arc starting module (7) are connected via a wire (3).
3. The electronic detonator according to claim 1, characterized in that: The arc starting module (7) comprises at least: a power supply module (71), an arc starting control circuit (72) electrically connected to the power supply module (71), an arc control circuit (73) electrically connected to the arc starting control circuit (72), and a high-voltage package (74) electrically connected to the arc control circuit (73); the high-voltage end of the high-voltage package (74) is connected to the arc starting plate.
4. The electronic detonator according to claim 3, characterized in that: The high-voltage package (74) comprises a primary coil and a secondary coil, wherein the primary coil is electrically connected to the arc control circuit (73), and the secondary coil is electrically connected to the arc starting plate (6).
5. The electronic detonator according to claim 4, characterized in that: The coil boost ratio of the primary coil and the secondary coil of the high-voltage package (74) is set so that the arc starting voltage of the high-voltage package (74) after boosting is not less than 4.5 kV.
6. The electronic detonator according to claim 3, characterized in that: The power supply module (71) is a battery power supply module and / or a power supply module.
7. The electronic detonator according to claim 1, characterized in that: The area where the arc starting plate (6) contacts the second delay charge (5) has a conical protrusion.
8. The electronic detonator according to claim 1, characterized in that: The wire connection point of the arc starting plate (6) is extended to the outside of the detonator body (1).