A device and method for quasi-explosive firing of a nonel electronic detonator

Abstract

The present invention relates to a device and method for quasi-explosive firing of a nonel electronic detonator. The device comprises: a detonator housing, a metal bracket, a piezoelectric film, a spring, a circuit module, a bridge wire resistor, and a nonel; the upper portion of the detonator housing is connected to the nonel, and the metal bracket is disposed in the middle of the detonator housing; the metal bracket comprises a shock wave receiving disc, an intermediate round rod, and a bracket base, which are sequentially arranged; the shock wave receiving disc is slidably connected to the inner wall of the detonator housing, and the intermediate round rod is connected to the shock wave receiving disc; the intermediate round rod passes through the center of the piezoelectric film and is connected thereto; the spring is located in a slot in the bracket base, and the other end of the spring contacts or separates from the intermediate round rod; the circuit module is electrically connected to the piezoelectric film, and the circuit module transmits voltage to the bridge wire resistor; the bridge wire resistor is used to detonate the electronic detonator. The device can be applied to detonating nonel detonators in various non-electric detonation networks.

Description

Technical Field

[0001] The invention belongs to the technical field of explosive devices, and in particular relates to a nonel electronic detonator quasi-explosive firing device and method. Background Art

[0002] Nonel detonators were once widely used in engineering blasting and mining blasting. Their advantages include low price, strong anti-interference capabilities, suitability for use in harsh environments, and the ability to connect to larger blasting networks. However, nonel detonators are difficult to manage because both the initiator and the detonator can be used at any time. With the advancement of blasting technology, especially the widespread application of micro-difference blasting and smooth blasting, the requirements for the delay accuracy of detonators are becoming increasingly stringent. This delay accuracy also affects the dispersion of the crushed medium and the blasting seismic phenomenon, necessitating the improvement of detonator accuracy.

[0003] The advantages of currently used electronic detonators include greater monitoring security, high delay accuracy, and network detectability. However, the initiation process is complex, prone to missed connections, a limited number of detonators that can be detonated at a time, and prone to accidents in strong electromagnetic fields. The initiation system of an electronic detonator consists of an encoder, an initiator, and a detonator. The detonator can only be activated by the initiator after being unlocked via a coding setting. The key lies in the chip's high precision and monitoring capabilities. However, larger detonator networks require greater initiation energy, limiting their scale. These advantages and disadvantages complement those of non-electric detonators. Taking these factors into consideration, a quasi-explosive firing device for non-electric detonators has been proposed, suitable for initiating non-electric detonators in various non-electric initiation networks. Summary of the Invention

[0004] The present invention aims to provide a nonel electronic detonator quasi-explosive firing device, which can be applied to the detonation of nonel detonators in various non-electric detonation networks.

[0005] In order to achieve the above purpose, the technical solutions adopted are as follows:

[0006] A nonel electronic detonator quasi-explosive firing device, comprising: a detonator shell, a metal bracket, a piezoelectric film, an insulating fixing plate, a spring, a circuit module, a bridge wire resistor and a nonel;

[0007] The upper portion of the detonator shell is connected to the detonating tube, and the metal bracket is arranged in the middle portion of the detonator shell;

[0008] The metal bracket is an I-shaped structure, comprising a shock wave receiving disc, an intermediate round rod and a bracket base arranged in sequence, wherein the shock wave receiving disc is slidably connected to the inner wall of the detonator shell, and the bracket base is fixedly connected to the inner wall of the detonator shell, and a bracket base slot is provided on the metal bracket base, and the side of the shock wave receiving disc close to the metal bracket base is connected to the intermediate round rod, and the intermediate round rod moves in the bracket base slot under the action of kinetic energy applied by the detonating tube;

[0009] The piezoelectric film is arranged between the shock wave receiving disc and the bracket base, the intermediate round rod passes through the center of the piezoelectric film and is connected thereto, and the outer periphery of the piezoelectric film is fixedly connected to the inner wall of the detonator shell;

[0010] The spring is located in the bracket base slot, one end of the spring is fixedly connected to the bracket base slot, and the other end of the spring is in contact with or separated from the middle round rod;

[0011] The circuit module is electrically connected to the piezoelectric film, and the circuit module transmits voltage to the bridge wire resistor;

[0012] The bridge wire resistor is used to detonate the electronic detonator.

[0013] Preferably, the circuit module rectifies, filters and stores energy of the unstable voltage generated by the piezoelectric film to form a stable voltage, and provides the stable voltage to the bridge wire resistor.

[0014] Preferably, a slider is provided on the inner wall of the detonator shell, and a slide groove is provided on the outer edge of the shock wave receiving disc, and the slide groove matches the slider.

[0015] Preferably, the shock wave receiving disc receives the detonation wave generated by the firing of the detonating tube, so that the shock wave receiving disc and the middle round rod slide downward under the guidance of the sliding groove and the slider, and the center of the piezoelectric film connected to the middle round rod is subjected to a downward force to produce maximum deformation.

[0016] Preferably, the diameter of the metal bracket shock wave receiving disc is smaller than the inner diameter of the detonator shell, and the shock wave receiving disc and the inner wall of the detonator shell are slidably connected through a slide groove and a slider, so that the shock wave receiving disc can slide up and down along the inner wall of the detonator shell.

[0017] Preferably, the device further comprises an insulating fixing piece, and the outer periphery of the piezoelectric film is fixedly connected to the inner wall of the detonator shell via the insulating fixing piece.

[0018] Preferably, there are a plurality of piezoelectric films, and the plurality of piezoelectric films are connected in parallel, and the plurality of parallel piezoelectric films are electrically connected to the circuit module.

[0019] Preferably, the piezoelectric film is a PVDF piezoelectric film.

[0020] Preferably, the circuit module uses an LTC3588 chip to form a circuit.

[0021] The present invention also provides a firing method based on the above-mentioned nonel electronic detonator quasi-explosive firing device, wherein when the nonel is fired, the shock wave receiving disk of the metal bracket receives the detonation wave generated by the nonel firing;

[0022] The shock wave receiving disc generates kinetic energy and moves downward along the inner wall of the detonator shell, causing the center of the piezoelectric film connected to the middle round rod to be subjected to a downward force until the metal round rod contacts the spring at the bottom of the fixed slot, resulting in maximum deformation;

[0023] The piezoelectric film deforms to generate electrical energy, and the circuit module transmits the voltage to the bridge wire resistor, so that the bridge wire resistor receives the voltage to detonate the electronic detonator.

[0024] In the above technical solution, the present invention provides a nonel electronic detonator quasi-explosive firing device, which has the following beneficial effects:

[0025] A quasi-explosive firing device for a nonel electronic detonator is provided. A piezoelectric film is used to power a bridge wire resistor. The shock wave receiving disk on the metal bracket drives the central round rod to move downward, causing the piezoelectric film fixed on the round rod and the detonator shell to deform. The piezoelectric film can produce maximum deformation, thereby generating maximum voltage.

[0026] The device can rectify and filter the current generated by the series connection of piezoelectric thin films through the circuit module, and store the generated electrical energy through the energy storage circuit. By adjusting the output port during operation, it can meet the voltage required in different initiation situations, which is sufficient to meet the initiation requirements of electronic detonators.

[0027] The invention has a simple structure, reasonable design, high working safety and reliability; compared with existing detonators, the device is green and environmentally friendly and can be applied to the detonation of non-electric detonating tube detonators in various non-electric detonating networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a nonel electronic detonator quasi-explosive firing device provided in an embodiment of the present invention;

[0029] Figure 2 A schematic cross-sectional view of the shock wave receiving disk of a nonel electronic detonator quasi-explosive firing device provided by an embodiment of the present invention;

[0030] Reference numerals:

[0031] 1. Detonating tube; 2. Diffusion cavity; 3. Shock wave receiving disk; 4. Slider; 5. Insulating fixing plate; 6. Piezoelectric film; 7. Metal rod; 8. Spring; 9. Bracket base slot; 10. Wire; 11. Circuit module; 12. Bridge wire resistor; 13. Detonator shell. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1-2 The present invention provides a nonel electronic detonator quasi-explosive firing device, comprising: a detonator shell 13, a metal bracket, a piezoelectric film 6, a spring 8, a circuit module 11, a bridge wire resistor 12 and a nonel 1;

[0034] The upper part of the detonator shell 13 is connected to the detonating tube 1, and the metal bracket is arranged in the middle part of the detonator shell 13;

[0035] The metal bracket is an I-shaped structure, including a shock wave receiving disc 3, an intermediate round rod 7 and a bracket base arranged in sequence. The shock wave receiving disc 3 is slidably connected to the inner wall of the detonator shell 13, and the bracket base is fixedly connected to the inner wall of the detonator shell. A bracket base slot 9 is provided on the bracket base. The side of the shock wave receiving disc 3 close to the bracket base is connected to the intermediate round rod 7. The intermediate round rod 7 moves in the bracket base slot 9 under the action of the kinetic energy applied by the detonating tube 1.

[0036] The piezoelectric film 6 is disposed between the shock wave receiving disc 3 and the bracket base. The intermediate round rod 7 passes through the center of the piezoelectric film 6 and is connected thereto. The outer periphery of the piezoelectric film 6 is fixedly connected to the inner wall of the detonator housing 13.

[0037] The spring 8 is located in the bracket base slot 9, one end of the spring 8 is fixedly connected to the bracket base slot 9, and the other end of the spring 8 is in contact with or separated from the middle round rod 7;

[0038] The circuit module 11 is electrically connected to the piezoelectric film 6 , and the circuit module 11 transmits voltage to the bridge wire resistor 12 ;

[0039] The bridge wire resistor 12 is used to detonate the electronic detonator.

[0040] In one embodiment, the specific configuration of the metal bracket is as follows: a spring 8 is welded to the bottom of the bracket base slot 9, and the metal round rod 7 does not contact the spring 8 in the non-working state. The dimensions are set as follows: the diameter of the shock wave receiving disc 3 is 10 mm and the thickness is 0.5 mm; the diameter of the metal round rod 7 is 2 mm and the length is 40 mm; the distance between the lower surface of the shock wave receiving disc 3 and the upper surface of the bracket base is 45 mm; the length of the bracket base slot 9 is 15 mm, the inner diameter is 2 mm, and the outer diameter is 4 mm; the spring length is 4 mm.

[0041] In one embodiment, a diffusion cavity 2 is provided at the rear end of the detonating tube 1 in the detonator shell 13. The diffusion cavity 2 is a cavity between the detonating tube 1 and the shock wave receiving disk 3. The diffusion cavity 2 is in the shape of a truncated cone. The inner diameter of the diffusion cavity 2 gradually expands in the direction away from the detonating tube 1. The purpose is to avoid direct contact between the detonating tube 1 and the shock wave receiving disk 3, reduce shock wave reflection, increase the effective receiving area, reduce kinetic energy loss, and improve device efficiency. Preferably, the height of the diffusion cavity 2 is 3 mm.

[0042] In order to meet the requirements of the shock wave receiving disc 3 of the metal bracket to move in the detonator shell 13, the diameter of the shock wave receiving disc 3 is smaller than the inner diameter of the detonator shell 13. Usually, the diameter of the shock wave receiving disc 3 is slightly smaller than the inner diameter of the detonator shell 13, and the shock wave receiving disc 3 and the inner wall of the detonator shell 13 are slidably connected by the slide groove and the slider 4, so that the shock wave receiving disc 3 can slide up and down along the inner wall of the detonator shell 13.

[0043] In one embodiment, the wall thickness of the detonator housing 13 is 0.5 mm, and the inner diameter of the detonator housing 13 is 10 mm. A slider 4 is provided on the inner wall of the detonator housing 13, and a chute is provided on the outer edge of the shock wave receiving disc 3, which matches the slider 4. Preferably, the slider 4 is in the shape of an inverted trapezoid, with four symmetrically arranged sliders 4. The chute is arranged in a similar manner to the slider, also in the shape of an inverted trapezoid, and four symmetrically arranged chute. The shock wave receiving disc 3 receives the detonation wave generated by the firing of the detonating tube 1, allowing the shock wave receiving disc 3 and the intermediate rod 7 to slide downward under the guidance of the chute and slider 4. The center of the piezoelectric film 6 connected to the intermediate rod 7 is subjected to a downward force, resulting in maximum deformation. The arrangement of the slider 4 and the chute allows the shock wave receiving disc 3 to slide up and down along the inner wall of the detonator housing 13 after being impacted without rotating left or right.

[0044] A pin hole with a diameter of 1mm is opened in the detonator tube wall 1mm below the initial position of the shock wave receiving disc 3. The inverted trapezoidal chute and slider 4 are both isosceles trapezoids with a base angle of 60° and a height of 2mm. The upper and lower base lengths of the trapezoid are 3mm and 5.3mm respectively; the slider 4 is 3.5mm long, and the upper end surface of the slider 4 is flush with the upper surface of the initial position of the shock wave receiving disc 3. The position and form of the slider 4 and chute are as follows Figure 2 shown.

[0045] The circuit module 11 rectifies, filters, and stores energy of the unstable voltage generated by the piezoelectric film 6 to form a stable voltage, and provides the stable voltage to the bridge wire resistor 12 .

[0046] The detonator electronic detonator quasi-explosive firing device also includes an insulating stator 5, through which the outer periphery of the piezoelectric film 6 is fixedly connected to the inner wall of the detonator housing 13. Preferably, the piezoelectric film 6 is a circular piezoelectric film sheet, and the insulating stator 5 is also circular. The insulating stator 5 is used to insulate and fix the piezoelectric film sheet. The insulating stator is made of silicone, with a single sheet thickness of 0.5 mm and an outer diameter identical to the inner diameter of the detonator housing 13. The piezoelectric film 6 is annular, with an outer diameter slightly larger than the inner diameter of the insulating stator and a thickness of 28 μm. It is adhered between two insulating stator sheets 5 to form a piezoelectric sheet set.

[0047] There are several piezoelectric films 6, which are connected in parallel and electrically connected to the circuit module 11. This forms several groups of piezoelectric sheets. Specifically, the insulating fixing sheet 5 in each group has small holes along its wall. Wires 10 connect all the piezoelectric sheets in series and connect them to the circuit module 11. Wires lead from the piezoelectric film 6 of the bottommost group of piezoelectric sheets to another port on the circuit module 11. All wires are adhered to the inner wall of the detonator housing 13 and securely bonded.

[0048] Each set of piezoelectric sheets has a central circular hole in the piezoelectric film, slightly larger in diameter than the metal rod 7. The rod 7 passes through the central hole. The outer edges of the piezoelectric sheets are bonded to the inner wall of the device's detonator housing 13, while the inner edges are bonded to the metal rod 7. The spacing between the piezoelectric sheets is 3 mm, which is greater than the maximum displacement of the metal rod caused by the shock wave receiving disk 3 receiving the detonator's shock wave. The top set of piezoelectric sheets is 4 mm away from the initial position of the shock wave receiving disk 3.

[0049] A wire 10 electrically connecting the piezoelectric film 6 and the circuit module 11 is arranged in the detonator housing 13. The piezoelectric film 6 is a PVDF piezoelectric film; the circuit module uses the LTC3588 chip to form a circuit.

[0050] Based on the above-mentioned nonel electronic detonator quasi-explosive firing device, the present invention also provides a nonel electronic detonator quasi-explosive firing method, when the nonel 1 is fired, the shock wave receiving disc 3 of the metal bracket receives the detonation wave generated by the firing of the nonel 1;

[0051] The shock wave receiving disc generates kinetic energy and moves downward along the inner wall of the detonator shell, causing the center of the piezoelectric film connected to the middle round rod to be subjected to a downward force, thereby generating maximum deformation;

[0052] Since the circular piezoelectric film 6 is fixed on the insulating fixing plate 5 to form a piezoelectric sheet, the outer edge and the center hole of the piezoelectric sheet are respectively bonded to the detonator shell 13 and the metal round rod 7. The piezoelectric film 6 deforms until the metal round rod 7 contacts the spring 8 at the bottom of the fixed slot, producing the maximum deformation. Under the buffering action of the spring, the piezoelectric film produces stable deformation and generates sufficient electrical energy to power the circuit module 11. The circuit module 11 performs rectification, filtering, and energy storage, and finally supplies voltage to the bridge wire resistor 12 for heating, so that the bridge wire resistor receives the voltage to detonate the electronic detonator.

[0053] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A nonel electronic detonator quasi-explosive firing device, characterized in that: The device comprises: a detonator shell, a metal bracket, a piezoelectric film, a spring, a circuit module, a bridge wire resistor and a detonating tube; The upper portion of the detonator shell is connected to the detonating tube, and the metal bracket is arranged in the middle portion of the detonator shell; The metal bracket is an I-shaped structure, comprising a shock wave receiving disc, an intermediate round rod and a bracket base arranged in sequence, wherein the shock wave receiving disc is slidably connected to the inner wall of the detonator shell, the bracket base is fixedly connected to the inner wall of the detonator shell, and a bracket base slot is provided on the bracket base. The side of the shock wave receiving disc close to the bracket base is connected to the intermediate round rod, and the intermediate round rod moves in the bracket base slot under the action of kinetic energy applied by the detonating tube; The piezoelectric film is arranged between the shock wave receiving disc and the bracket base, the intermediate round rod passes through the center of the piezoelectric film and is connected thereto, and the outer periphery of the piezoelectric film is fixedly connected to the inner wall of the detonator shell; The spring is located in the bracket base slot, one end of the spring is fixedly connected to the bracket base slot, and the other end of the spring is in contact with or separated from the middle round rod; The circuit module is electrically connected to the piezoelectric film, and the circuit module transmits voltage to the bridge wire resistor; The bridge wire resistor is used to detonate the electronic detonator; A slider is provided on the inner wall of the detonator shell, and a slide groove is provided on the outer edge of the shock wave receiving disc, and the slide groove matches the slider; The shock wave receiving disc receives the detonation wave generated by the firing of the detonating tube, so that the shock wave receiving disc and the middle round rod slide downward under the guidance of the sliding groove and the slider, and the center of the piezoelectric film connected to the middle round rod is subjected to a downward force, thereby generating maximum deformation; A diffusion cavity is provided at the rear end of the detonating tube. The diffusion cavity is a cavity between the detonating tube and the shock wave receiving disk. The diffusion cavity is in the shape of a truncated cone, and the inner diameter of the diffusion cavity gradually expands in the direction away from the detonating tube.

2. The nonel electronic detonator quasi-explosive firing device according to claim 1, characterized in that: The circuit module rectifies, filters and stores energy of the unstable voltage generated by the piezoelectric film to form a stable voltage, and provides the stable voltage to the bridge wire resistor.

3. The nonel electronic detonator quasi-explosive firing device according to claim 1, characterized in that: The diameter of the shock wave receiving disc is smaller than the inner diameter of the detonator shell, and the shock wave receiving disc and the inner wall of the detonator shell are slidably connected through a sliding groove and a slider, so that the shock wave receiving disc can slide up and down along the inner wall of the detonator shell.

4. The nonel electronic detonator quasi-explosive firing device according to claim 1, characterized in that: The device also includes an insulating fixing piece, through which the outer periphery of the piezoelectric film is fixedly connected to the inner wall of the detonator shell.

5. The nonel electronic detonator quasi-explosive firing device according to claim 1, characterized in that: There are a plurality of piezoelectric films, which are connected in parallel and are electrically connected to the circuit module.

6. The nonel electronic detonator quasi-explosive firing device according to claim 1, characterized in that: The piezoelectric film is a PVDF piezoelectric film.

7. The nonel electronic detonator quasi-explosive firing device according to claim 1, characterized in that: The circuit module uses the LTC3588 chip to form a circuit.

8. A firing method based on the nonel electronic detonator quasi-explosive firing device according to any one of claims 1 to 7, characterized in that: When the detonating tube is fired, the shock wave receiving disc of the metal bracket receives the detonation wave generated by the firing of the detonating tube; The shock wave receiving disc generates kinetic energy and moves downward along the inner wall of the detonator shell, causing the center of the piezoelectric film connected to the middle round rod to be subjected to a downward force until the metal round rod contacts the spring at the bottom of the fixed slot, resulting in maximum deformation; The piezoelectric film deforms to generate electrical energy, and the circuit module transmits the voltage to the bridge wire resistor, so that the bridge wire resistor receives the voltage to detonate the electronic detonator.

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