Ignition-free digital detonator

Abstract

The utility model discloses a non-ignition gunpowder digital detonator which comprises a detonator shell and an electric control detonation module, an inner cavity of the detonator shell is filled with an initiating explosive and a high explosive, and the electric control detonation module is provided with a circuit board, an ignition core attached to the circuit board in a side surface patch mode and a leg wire electrically connected to the circuit board. The electric control detonating module is inserted into an inner cavity of the tube shell in a sealed mode, meanwhile, the ignition core is embedded into the initiating explosive, and the leg wire is partially exposed out of the tube shell so as to be connected with an external power source. The ignition-powder-free digital detonator is free of ignition powder, timely in response time and large in explosive power, and the market requirement of the detonator is well met.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic detonators, in particular to a digital detonator without ignition powder. Background Art

[0002] In industries such as drilling, digital electronic detonators are widely used due to their advantages of rapid response, high initiation ability, high safety, economic environmental protection, etc. At present, the working mechanism of digital electronic detonators is generally as follows: the igniter in the detonator is electrified, so that the bridge wire on the igniter generates heat. After the heating temperature of the bridge wire reaches the ignition point of the primer, the primer is ignited, and then the detonating charge and the high explosive are detonated, causing the detonator product to explode.

[0003] However, the current digital electronic detonator products have the following deficiencies: ① After the igniter is electrified, the heat generated by the bridge wire first ignites the primer and then detonates the detonating charge and the high explosive. Therefore, the dipping amount and performance of the primer have a very important impact on the reaction time, explosion power, etc. of the detonating charge and the high explosive. However, at present, the industry is difficult to accurately control the dipping amount and performance of the primer, resulting in uneven use performance (including response time) of the igniter, seriously affecting the blasting effect of the detonator. ② Since the primer is generally wrapped around the bridge wire of the igniter, this will increase the difficulty and danger in the processing of the igniter.

[0004] In view of this, the present utility model is specifically proposed. Summary of the Invention

[0005] In order to overcome the above defects, the utility model provides a digital detonator without ignition powder, which has no primer, timely response time and large explosion power, well meeting the market demand of detonators.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a digital detonator without ignition powder, including a shell and an electronic control detonation module. The inner cavity of the shell is filled with detonating charge and high explosive. The electronic control detonation module is provided with a circuit board, an ignition core attached to the circuit board in a side patch form, and a leg wire electrically connected to the circuit board. The electronic control detonation module is hermetically inserted into the inner cavity of the shell, and at the same time, the ignition core is buried in the detonating charge, and a part of the leg wire is exposed outside the shell for connection to an external power supply.

[0007] As a further improvement of the utility model, the ignition core includes a substrate, a connection circuit pattern provided on the front surface of the substrate, a resistance wire provided on the front surface of the substrate and electrically connected to the connection circuit pattern according to the electrical design requirements of the product to jointly form a heating branch, and a side pad provided on the side surface of the substrate and electrically connected to the heating branch; wherein, the front surface of the substrate is adjacent to its side surface, and the side pad is attached to the surface of the circuit board.

[0008] As a further improvement of the present utility model, the shell is a hollow circular tube body with an opening on one side; the high explosive and the primer are sequentially filled into the inner cavity of the shell in sequence; the front surface of the substrate and the heating branch on it both face the bottom of the shell.

[0009] As a further improvement of the present utility model, the front surface of the substrate is a plane, and the central axis of the shell is perpendicular to the front surface of the substrate.

[0010] As a further improvement of the present utility model, the resistance wire is configured to be one or more, and is connected in series with the connection circuit pattern to form the heating branch.

[0011] As a further improvement of the present utility model, the surface of the resistance wire is plated with an energetic material layer.

[0012] As a further improvement of the present utility model, the ignition core further includes a back solder pad provided on the back surface of the substrate, and the back solder pad is respectively connected to the side solder pad and the connection circuit pattern.

[0013] As a further improvement of the present utility model, the electronic control detonation module is also provided with an injection molding body, and the injection molding body tightly wraps at least a part of the circuit board and the leg wire.

[0014] As a further improvement of the present utility model, the circuit board is provided with a first solder pad for welding connection with the ignition core, a second solder pad for welding connection with the leg wire, and a connection circuit connecting between the first solder pad and the second solder pad. The connection circuit is tightly wrapped with an insulating colloid, and at the same time, the insulating colloid is also wrapped in the injection molding body.

[0015] As a further improvement of the present utility model, the electronic control detonation module is tightly inserted into the inner cavity of the shell through the injection molding body; a sealing cover is also provided at the opening of the shell.

[0016] The beneficial effects of the present utility model are as follows: Compared with the prior art, ① the present utility model provides a digital detonator that does not require dipping in ignition gunpowder (i.e., no primer), has a timely response time (up to the microsecond level), and a large explosion power, which can well meet the market demand for detonators. ② In the structure of the digital detonator of the present utility model, the ignition core not only has characteristics such as good heat aggregation effect and high heating temperature (up to 3000 °C at most), but also is particularly attached to the circuit board in the form of a side patch. This can help the high-temperature heat generated by the ignition core to be released in the direction where the primer and the booster explosive are arranged, thus being more conducive to detonating the primer and the booster explosive, and further greatly improving the response timeliness and explosion effect of the detonator. ③ In the structure of the digital detonator of the present utility model, the primer and the booster explosive are directly detonated by the ignition core without using primer, which can effectively avoid the safety hazards in the production, transportation, storage and other links of traditional ignition devices, and is very conducive to the mass production of the ignition core. ④ In the structure of the digital detonator of the present utility model, the structure of the ignition core is simple, reasonable and novel, and the product has high consistency, stability and reliability, thus greatly improving the working consistency, stability and reliability of the digital detonator product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a semi-sectional structural schematic diagram of the primer-free digital detonator according to Embodiment 1 of the present utility model;

[0018] Figure 2 is a partial structural schematic diagram of the electric control detonation module according to Embodiment 1 of the present utility model;

[0019] Figure 3 is Figure 2 an enlarged structural schematic diagram of part A shown;

[0020] Figure 4 is Figure 2 a structural schematic diagram of the ignition core from other perspectives shown;

[0021] Figure 5 is one of the structural schematic diagrams of the ignition core in the primer-free digital detonator according to Embodiment 2 of the present utility model;

[0022] Figure 6 is another structural schematic diagram of the ignition core in the primer-free digital detonator according to Embodiment 2 of the present utility model;

[0023] Figure 7 is yet another structural schematic diagram of the ignition core in the primer-free digital detonator according to Embodiment 2 of the present utility model;

[0024] Figure 8One of the schematic structural diagrams of the ignition core in the ignition - free digital detonator described in Embodiment 3 of the present utility model;

[0025] Figure 9 Another schematic structural diagram of the ignition core in the ignition - free digital detonator described in Embodiment 3 of the present utility model;

[0026] Figure 10 The third schematic structural diagram of the ignition core in the ignition - free digital detonator described in Embodiment 3 of the present utility model.

[0027] The following explanations are made in combination with the attached drawings:

[0028] 1. Shell; 2. Electric - control detonation module; 20. Circuit board; 201. First pad; 202. Second pad; 203. Connection line; 21. Ignition core; 210. Substrate; 211. Connection - line pattern; 212. Resistance wire; 213. Side pad; 214. Back pad; 22. Leg wire; 23. Injection - molded body; 24. Insulating colloid. Detailed implementation manners

[0029] The following describes the preferred embodiments of the present utility model in detail with reference to the attached drawings.

[0030] Embodiment 1:

[0031] Please refer to the attached Figure 1 As shown in the figure, Embodiment 1 of the present utility model provides an ignition - free digital detonator, which mainly includes a shell 1 and an electric - control detonation module 2. Among them, the inner cavity of the shell 1 is filled with primary explosive EM1 and booster explosive EM2. The electric - control detonation module 2 is provided with a circuit board 20, an ignition core 21 attached to the circuit board 20 in a side - surface patch form, and a leg wire 22 electrically connected to the circuit board 20. The electric - control detonation module 2 is hermetically inserted into the inner cavity of the shell 1, and at the same time, the ignition core 21 is buried in the primary explosive EM1, and a part of the leg wire 22 is exposed outside the shell 1 for connection to an external power supply. It can be understood that when the leg wire 22 is connected to an external power supply, the ignition core 21 can instantaneously generate high - temperature heat (up to 3000 °C) and detonate the primary explosive EM1 and the booster explosive EM2 in sequence, so as to achieve an explosion effect with timely response (response time can reach the micro - second level) and large explosion power, which well meets the market demand of detonators. In addition, as can be seen from the above, the digital detonator provided in Embodiment 1 of the present utility model does not need to dip ignition powder (i.e., no primer), which can effectively avoid the safety hazards in the production, transportation, storage and other links of traditional igniters, is very conducive to the mass production of the ignition core, and can effectively improve the product consistency, stability and reliability of the ignition core, and further greatly improve the working consistency, stability and reliability of digital detonator products.

[0032] The specific structure of the digital detonator without ignition powder described in Embodiment 1 will be described in detail below.

[0033] In Embodiment 1, the specific structure and assembly method of the electric control detonation module 2 are as follows: Please refer to the attached Figure 1 to the attached Figure 4 As shown, the circuit board 20 is provided with a first pad 201, a second pad 202, and a connection line 203 connected between the first pad 201 and the second pad 202; the ignition core 21 includes a substrate 210, a connection line pattern 211 provided on the front surface of the substrate 210, a resistance wire 212 provided on the front surface of the substrate 210 and electrically connected to the connection line pattern 211 according to the electrical design requirements of the product to jointly form a heating branch, and a side pad 213 provided on the side surface of the substrate 210 and electrically connected to the heating branch. The front surface of the substrate 210 is adjacent to its side surface. The side pad 213 is attached to the surface of the circuit board 20 by SMT soldering process. Specifically, the side pad 213 is attached to the first pad 201 by SMT soldering process; one end of the lead wire 22 is welded and fixed to the second pad 202. It can be understood that by electrically connecting the second pad 202 and the first pad 201, the lead wire 22 can be electrically connected to the side pad 213 and the heating branch. In this way, when the lead wire 22 is connected to an external power supply, the heating branch is immediately energized and heated, generating a high-temperature heat of up to 3000 °C.

[0034] Furthermore, please continue to refer to the attached Figure 3 and the attached Figure 4As shown, in the present Embodiment 1, the substrate 210 preferably adopts a cuboid block structure, that is: the substrate 210 has a front surface and a back surface arranged back to back, and four peripheral side surfaces adjacent between the front surface and the back surface; of course, the present Embodiment 1 does not impose any restrictive requirements on the specific shape of the substrate 210, and it can be determined according to the product design requirements. Based on the cuboid shape of the substrate 210, ① both the connection line pattern 211 and the resistance wire 212 are arranged on the front surface of the planar substrate 210. This is not only convenient for and conducive to the electrical connection between the connection line pattern 211 and the resistance wire 212, but also particularly conducive to enabling the heating branch to instantaneously gather a large amount of heat, that is, the heat aggregation effect of the heating branch can be achieved very well, thereby greatly enhancing the response timeliness and explosion power of the detonator. ② The side pads 213 are formed on at least one side surface (also) of the substrate 210, which can provide support for better enhancing the explosion effect of the detonator (see the following). Supplementary: The connection line pattern 211 and the side pads 213 of the present application are processed and manufactured through printed circuit board processing techniques (including coating with anti-etching photosensitive film, exposure, development, etching, stripping, etc.), which belong to conventional technical means in the field of printed circuit board processing, so they will not be elaborated here.

[0035] Furthermore, in order to better enhance the explosion effect of the detonator, the present Embodiment 1 also makes the following optimized design: when the electronic control detonation module 2 is hermetically inserted into the inner cavity of the shell 1, the front surface of the substrate 210 and the heating branch thereon are both designed to face the bottom of the shell 1. Specifically, please continue to refer to the attached Figure 1 to the attached Figure 3 As shown, taking the overall shell 1 as a hollow cylindrical structure with an opening on one side as an example, during the assembly of the detonator, the explosives are filled into the inner cavity of the shell 1 in the order of "first filling the main explosive EM2, and then filling the primer EM1"; then the electronic control detonation module 2 is inserted into the inner cavity of the shell 1. At this time, while the ignition core 21 and the circuit board 20 part are buried in the primer EM1 together, it is also preferably controlled that the front surface of the substrate 210 and the heating branch thereon both face the bottom of the shell 1 (the best layout state is: the central axis of the shell 1 is perpendicular to the front surface of the substrate 210). In this way, the heating branch can release heat in the direction of the bottom of the shell 1, which can also be understood as: the heating branch can release heat in the direction in which the primer EM1 and the main explosive EM2 are arranged in sequence, thereby being more conducive to detonating the primer EM1 and the main explosive EM2, and further enhancing the response timeliness and explosion effect of the detonator.

[0036] Furthermore, in the first embodiment, there is no limit on the number of the connection line patterns 211 and the resistance wires 212, which can be specifically determined according to the product design requirements. For example, please continue to refer to the attached Figure 4 As shown, in the first embodiment, the connection line patterns 211 are configured to be three, namely: a rectangle, a Z - shape, and an irregular rectangle; the resistance wires 212 are configured to be two, and the three connection line patterns 211 and the two resistance wires 212 are alternately arranged in sequence and connected end - to - end (specifically, by welding connection), and are connected in series to form the heating branch.

[0037] In addition, in the first embodiment, the resistance wire 212 is preferably made of tungsten alloy material, and an energetic material layer is plated on the surface of the resistance wire 212, and a nickel - plating layer and a copper - plating layer are sequentially plated at the position where the resistance wire 212 is welded to the connection line pattern 211. Among them, the material of the energetic material layer can be a metallic energetic material such as titanium powder to improve the ignition performance of the resistance wire 212 / the heating branch; the nickel - plating layer can well improve the bonding property between the copper - plating layer and the resistance wire 212 and the connection line pattern 211, and can improve the mechanical strength of the copper - plating layer; the copper - plating layer can improve the conduction performance between the resistance wire 212 and the connection line pattern 211 during high - temperature operation, thereby ensuring the reliability and accuracy of the ignition core 21 during high - temperature operation.

[0038] Furthermore, the structure for electrically connecting the heating branch and the side pad 213 in the first embodiment is: please continue to refer to the attached Figure 3 and the attached Figure 4 As shown, the ignition core 21 further includes a back pad 214 provided on the back surface (also planar) of the substrate 210, and the back pad 214 is respectively connected to the side pad 213 and the connection line pattern 211. Specifically, one end of the back pad 214 is smoothly transitionally connected to the side pad 213, and the back pad 214 is connected to the connection line pattern 211 through a connecting copper body. Supplementary description: The connecting copper body is built in the substrate 210 and penetrates through the front and back surfaces of the substrate 210 respectively (which can be realized through processing operations such as drilling through - holes and electroplating in printed circuit board processing) to realize connection with the back pad 214 and the connection line pattern 211.

[0039] In addition, please continue to refer to the attached Figure 1 and the attached Figure 2As shown in the figure, in Embodiment 1, the electric control detonation module 2 further includes an injection molded body 23 and an insulating colloid 24. Among them, the insulating colloid 24 tightly wraps around the connection line 203 to provide insulation protection for the connection line 203, that is, to protect the conduction performance between the leg wire 22 and the ignition core 21; the injection molded body 23 tightly wraps around at least a part of the circuit board 20 and the leg wire 22 (the ignition core 21 is not wrapped by the injection molded body 23) to improve the overall electrical performance, assembly performance, etc. of the electric control detonation module 2. It can be understood that: ① the entire insulating colloid 24 is wrapped within the injection molded body 23; ② the electric control detonation module 2 is tightly and insertedly installed in the inner cavity of the cartridge case 1 through the injection molded body 23.

[0040] In addition, in Embodiment 1, the detonator further includes a sealing cover (not shown in the figure), and the sealing cover is provided at the opening of the cartridge case 1 to seal the inner cavity of the cartridge case 1 and the contents therein.

[0041] Embodiment 2:

[0042] Embodiment 2 also provides a non-primary explosive digital detonator. Compared with Embodiment 1, the non-primary explosive digital detonator described in Embodiment 2 has the following differences: ① the shape of the substrate 210 and / or the shape of the connection line pattern 211 in the ignition core 21 structure of Embodiment 2 are not completely the same as those in Embodiment 1.

[0043] Specifically, Embodiment 2 provides three detonator implementation structures, as shown in Appendix Figure 5 to Appendix Figure 7 respectively. Among them,

[0044] As can be seen from Appendix Figure 5 , in the first detonator implementation structure provided in Embodiment 2, the shape of the substrate 210 is an irregular block, and the shapes of the three connection line patterns 211 are respectively an irregular trapezoid, a Z shape, and an irregular rectangle; which is not completely the same as that in Embodiment 1.

[0045] As can be seen from Appendix Figure 6 , in the second detonator implementation structure provided in Embodiment 2, the shape of the substrate 210 is a cuboid block, and the shapes of the three connection line patterns 211 are respectively a disconnected ring, a Z shape, and an L shape; which is not completely the same as that in Embodiment 1.

[0046] As can be seen from Appendix Figure 7 , in the third detonator implementation structure provided in Embodiment 2, the shape of the substrate 210 is a cuboid block, and the shapes of the three connection line patterns 211 are respectively a block shape with an arc-shaped notch, a Z shape, and a rectangle; which is not completely the same as that in Embodiment 1.

[0047] Except for the above-mentioned difference ①, for the structures of other components in the non-ignition powder digital detonator described in this Embodiment 2 and the connection relationships between them, such as: the structures, shapes, and / or connection relationships of the shell 1, the circuit board 20, the leg wire 22, the resistance wire 212, the side pad 213, etc., the same technical means as those in Embodiment 1 can be adopted, so they will not be elaborated here.

[0048] Embodiment 3:

[0049] This Embodiment 3 also provides a non-ignition powder digital detonator. Compared with Embodiment 1, the non-ignition powder digital detonator described in this Embodiment 3 has the following differences: ① In the structure of the ignition core 21 described in this Embodiment 3, the configuration quantity and shape of the resistance wire 212 and the connection line pattern 211 are different from those in Embodiment 1; and / or ② In the structure of the ignition core 21 described in this Embodiment 3, the shape of the substrate 210 is different from that in Embodiment 1.

[0050] Specifically, this Embodiment 3 provides three detonator implementation structures, as shown in Appendix Figure 8 to Appendix Figure 10 respectively. Among them,

[0051] As can be seen from Appendix Figure 8 in the first detonator implementation structure provided by this Embodiment 3, ① the connection line pattern 211 is configured as two and both are rectangles, the resistance wire 212 is configured as one, and both ends of the resistance wire 212 are respectively connected to the two connection line patterns 211 to form the heating branch in series. This is different from Embodiment 1. ② The substrate 210 is a cuboid block, which is the same as that in Embodiment 1.

[0052] As can be seen from Appendix Figure 9 in the second detonator implementation structure provided by this Embodiment 3, ① the connection line pattern 211 is configured as two and both are irregular trapezoids, the resistance wire 212 is configured as one, and both ends of the resistance wire 212 are respectively connected to the two connection line patterns 211 to form the heating branch in series. This is different from Embodiment 1. ② The substrate 210 is an irregular block, which is different from that in Embodiment 1.

[0053] As can be seen from Appendix Figure 10 in the third detonator implementation structure provided by this Embodiment 3, ① the connection line pattern 211 is configured as two and both are rectangles, the resistance wire 212 is configured as one, and both ends of the resistance wire 212 are respectively connected to the two connection line patterns 211 to form the heating branch in series. This is different from Embodiment 1. ② The substrate 210 is a cuboid block, which is the same as that in Embodiment 1.

[0054] Except for the above-mentioned differences ① and / or ②, the structures of other components in the digital detonator without ignition powder described in this Embodiment 3 and the connection relationships between them, such as: the structures, shapes, and / or connection relationships of the shell 1, the circuit board 20, the leg wire 22, the resistance wire 212, the side pad 213, etc., can all adopt the same technical means as those in Embodiment 1, so they will not be elaborated here.

[0055] Finally, the prefixes "first", "second", etc. (such as the first pad, the second pad, etc.) of the component names in the specification of the utility model patent are only for the convenience of clear description, rather than for limiting the scope of implementation of the utility model patent.

[0056] In summary, the digital detonator described in the utility model has a simple, reasonable, and novel structure, no primer, timely response time, and large explosion power. The working consistency, stability, and reliability of the product are high, which well meets the market demand of detonators.

[0057] In the above description, many specific details are elaborated to fully understand the utility model. However, the above description is only a preferred embodiment of the utility model, and the utility model can be implemented in many other ways different from those described here. Therefore, the utility model is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can make many possible changes and modifications to the technical solution of the utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes. All modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still fall within the scope of protection of the technical solution of the utility model.

Claims

1. A digital detonator without ignition powder, characterized in that: The invention comprises a tube shell (1) and an electric-controlled detonation module (2), wherein the inner cavity of the tube shell (1) contains detonating explosive and secondary explosive, and the electric-controlled detonation module (2) is provided with a circuit board (20), an ignition core (21) attached to the circuit board (20) in the form of a side patch, and a foot line (22) electrically connected to the circuit board (20), wherein the electric-controlled detonation module (2) is sealed and inserted into the inner cavity of the tube shell (1), and the ignition core (21) is embedded in the detonating explosive, and the foot line (22) is partially exposed outside the tube shell (1) for connection with an external power source.

2. The pyrotechnic powder-free digital detonator according to claim 1, characterized in that: The ignition core (21) comprises a substrate (210), a connection circuit pattern (211) arranged on the front side of the substrate (210), a resistance wire (212) arranged on the front side of the substrate (210) and electrically connected to the connection circuit pattern (211) according to product electrical design requirements to jointly form a heating branch, and a side soldering pad (213) arranged on the side of the substrate (210) and electrically connected to the heating branch; wherein the front side of the substrate (210) is adjacent to the side side thereof, and the side soldering pad (213) is attached to the surface of the circuit board (20).

3. The pyrotechnic powder-free digital detonator according to claim 2, characterized in that: The tube shell (1) is a hollow circular tube with an opening on one side; The secondary explosive and the primary explosive are sequentially filled into the inner cavity of the tube shell (1); The front surface of the substrate (210) and the heat-generating branch thereon are both oriented toward the bottom of the tube shell (1).

4. The pyrotechnic powder-free digital detonator according to claim 3, characterized in that: The front surface of the substrate (210) is a plane, and the central axis of the tube shell (1) is perpendicular to the front surface of the substrate (210).

5. The pyrotechnic powder-free digital detonator according to claim 2, characterized in that: The resistance wire (212) is provided in one or more pieces and is connected in series with the connection line pattern (211) to form the heating branch.

6. The pyrotechnic powder-free digital detonator according to claim 5, characterized in that: The surface of the resistance wire (212) is plated with an energetic material layer.

7. The pyrotechnic powder-free digital detonator according to claim 2, characterized in that: The ignition core (21) further comprises a back soldering pad (214) arranged on the back side of the substrate (210), and the back soldering pad (214) is respectively connected to the side soldering pad (213) and the connection circuit pattern (211).

8. The pyrotechnic powder-free digital detonator according to claim 1, characterized in that: The electrically controlled detonation module (2) is further provided with an injection molded body (23), wherein the injection molded body (23) is tightly wrapped around at least a portion of the circuit board (20) and the foot line (22).

9. The pyrotechnic powder-free digital detonator according to claim 8, characterized in that: The circuit board (20) is provided with a first soldering pad (201) for welding connection with the ignition core (21), a second soldering pad (202) for welding connection with the foot line (22), and a connecting line (203) connected between the first soldering pad (201) and the second soldering pad (202), the connecting line (203) is tightly wrapped with an insulating colloid (24), and the insulating colloid (24) is also wrapped in the injection molded body (23).

10. The pyrotechnic powder-free digital detonator according to claim 8, characterized in that: The electrically controlled detonation module (2) is tightly fitted and inserted into the inner cavity of the tube shell (1) through the injection molded body (23); a sealing cover is also provided at the opening of the tube shell (1).

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