CN109836301B - Detonating cord with multicore structure - Google Patents
Detonating cord with multicore structure Download PDFInfo
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- CN109836301B CN109836301B CN201910271407.0A CN201910271407A CN109836301B CN 109836301 B CN109836301 B CN 109836301B CN 201910271407 A CN201910271407 A CN 201910271407A CN 109836301 B CN109836301 B CN 109836301B
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- detonating cord
- detonating
- core
- winding section
- cord
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- 238000004804 winding Methods 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims abstract description 28
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 11
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 11
- 239000007769 metal material Substances 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims 1
- 239000002360 explosive Substances 0.000 abstract description 24
- 238000004880 explosion Methods 0.000 description 10
- 239000002985 plastic film Substances 0.000 description 8
- 229920006255 plastic film Polymers 0.000 description 8
- 238000005422 blasting Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 5
- 238000005474 detonation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- Laminated Bodies (AREA)
Abstract
The invention provides a detonating cord with a multi-core structure, which comprises a detonating cord and a fiber line I wound on the outer surface of the detonating cord towards one end, wherein the detonating cord adopts a plurality of detonating cords to form a multi-core detonating cord bundle in parallel, the surface of the multi-core detonating cord bundle is wound towards one end periodically by the fiber line II in an alternating and continuous mode of a forward winding section II and a reverse winding section II, the number of turns of the forward winding section II and the reverse winding section II is the same, the turn density is the same, the multi-core detonating cord is manufactured, and a shell is packaged on the outer surface of the multi-core detonating cord after winding. The cylinders of adjacent detonating cords inside the multi-core detonating cord are distributed tangentially. The outer surface of the detonating cord is also encapsulated with a thermoplastic layer. The detonating cord adopts a multi-core combined structure, the detonating energy is uniform, the energy of multiple single cores can be obtained according to the requirement of the weak industrial explosive quantity design, the multi-core detonating cord is designed in a uniform gap, the superposition of the energy is generated, and the energy is directly converted into the mechanical energy for tangential work.
Description
Technical Field
The invention relates to a detonating cord, in particular to a detonating cord with a multi-core structure.
Background
The detonating cord is made up by using several cotton threads as core wire, making a certain quantity of explosive be taken into hole diameter mould, making it be wrapped by winding plastic film and fibre, coating plastic on the plastic extruder, and directly making it be wrapped by using stretchable metal material so as to obtain the invented single-core-charged circular cord-shaped blasting equipment. When detonated by the detonator, the detonation wave can be instantaneously transmitted longitudinally at an explosion speed of more than 6000 m/s, and meanwhile, the detonation wave has the capability of tangentially acting. For example: the method is used for tunnel smooth blasting operation, deep hole presplitting blasting operation, stone hydraulic blasting exploitation, pipeline explosion expansion joint processing, other military use and the like. But has the following problems: 1. the detonating cord product can be folded and rubbed during transportation or use, the density of the explosive core in the detonating cord product is changed, and the local energy is uneven, so that the detonating effect is affected; the stretchable metal material has poor flexibility, and can break or even reject explosion; 2. when a certain specific application occasion needs to obtain higher explosion energy to detonate weak industrial explosive, the detonating cord below the medium energy is difficult to obtain higher explosion energy, and if the detonating cord with ultra-large energy is produced by a single-core structure, the detonating cord is limited by process, equipment and safety conditions and even cannot be realized; 3. in order to obtain higher blasting energy, if a plurality of detonating cords are used for bundling and stacking a combination mode, the problem that the stacking direction of the energy detonation cannot be controlled directionally due to uneven gaps of the detonating cords is solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a detonating cord with a multi-core structure.
The invention is realized by the following technical scheme: the utility model provides a detonating cord with multicore structure, includes detonating cord and fiber line I to one end coiling on the detonating cord surface, its characterized in that: the detonating cord adopts a plurality of detonating cords to form a multi-core detonating cord bundle in parallel, the surface of the multi-core detonating cord bundle is wound to one end periodically in an alternating and continuous mode by using a fiber wire II, the number of turns of the forward winding section II is the same as that of the reverse winding section II, the turn density of the forward winding section II is the same as that of the reverse winding section II, and the outer surface of the wound multi-core detonating cord is packaged with a shell.
In the above scheme, the winding direction of the fiber line II towards one end is the same as the winding direction of the fiber line I.
In the scheme, the multi-core detonating cord is two or three detonating cords, and cylinders of adjacent detonating cords in the multi-core detonating cord are distributed tangentially.
In the scheme, the multi-core detonating cord consists of seven detonating cords, one detonating cord is selected as a circle center, and the rest detonating cords are uniformly distributed around the circumference of the cylinder of the detonating cord.
In the scheme, the outer surface of the detonating cord is also encapsulated with a thermoplastic layer.
In the above scheme, the shell is a thermoplastic layer or a flexible metal material layer.
Compared with the prior art, the detonating cord with the multi-core structure has the following beneficial effects:
1. the detonating cord adopts a multi-core combined structure, so that the problem that the density of a local explosive core of the detonating cord with single core and low energy is changed due to other reasons can be solved, and the detonating energy is uniform;
2. the product is combined into a bundle by a common standardized finished product, and when higher explosion energy is obtained to detonate the weak industrial explosive, the energy of a single core multiple times can be obtained according to the requirement of the weak industrial explosive quantity design;
3. the multicore detonating cords are designed with uniform gaps, an energy gathering effect is formed in the detonation direction between the adjacent detonating cords, energy superposition is generated, and the energy is directly converted into mechanical energy for tangential work.
Drawings
FIG. 1 is a schematic diagram of a two-core structure of a detonating cord of the multi-core structure of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic diagram of a three-core structure of the detonating cord of the multi-core structure of the present invention;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic diagram of the seven cores of the detonating cord of the multi-core structure of the present invention;
fig. 6 is a side view of fig. 5.
In the figure: 1. cotton yarn bearing line, explosive core, plastic film, fiber line I, thermoplastic layer 5, fiber line II, casing 7, casing 8, forward winding section I, reverse winding section II, 10, forward winding section II,11, reverse winding section II,12.
Detailed Description
The preferred embodiments of the detonating cord of the multi-core structure of the present invention are described below in conjunction with the accompanying drawings and specific embodiments, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only and are not intended to limit the present invention in any way.
Example 1
Fig. 1 is a schematic diagram of a two-core structure of a detonating cord of the multi-core structure of the present invention, and fig. 2 is a side view of fig. 1. In the drawing, the outer surface of the cotton yarn carrier line 1 is wrapped with the explosive core 2, the outer surface of the explosive core 2 is externally wrapped with the plastic film 3, the outer surface of the plastic film 3 is periodically wound to one end in an alternating and continuous mode by using the fiber line I4, the winding number of the forward winding section I8 and the winding number of the reverse winding section I9 are the same, the winding density of the turns are the same to manufacture the detonating cord 12, the detonating cord 12 adopts two detonating cords 12 to form two-core detonating cord bundles in parallel, the cylindrical bodies of adjacent detonating cords 12 in the two-core detonating cord bundles are distributed in a tangential mode, the outer surface of the fiber line I4 on the detonating cord 12 is also packaged with the thermoplastic layer 5, the surface of the two-core detonating cord bundles is wound to one end in an alternating and continuous mode by using the fiber line II10 and the reverse winding section II11, the winding number of turns of the forward winding section II10 and the reverse winding section II11 are the same, the turn density of the detonating cord is the same to manufacture two-core detonating cord bundles, the fiber line II6 is wound to one end in the same direction as the winding direction of the fiber line I4, and the outer surface of the thermoplastic layer 7 is packaged with the thermoplastic layer 7 after the detonating cord is wound on the outer surface of the shell.
When the explosive quantity of the two-core detonating cord is designed, the total design explosive quantity can be kept unchanged, the two explosive quantities are of a double-core structure which is one half of the original single-core structure product, the defect that the density of the explosive is reduced due to folding and rubbing can be overcome, and when one core is subjected to explosion rejection and the other core is subjected to mutual inductance explosion energy, the occurrence probability of explosion rejection is greatly reduced.
Example 2
Fig. 3 is a schematic diagram of a three-core structure of the detonating cord of the multi-core structure of the present invention, and fig. 4 is a side view of fig. 3. In the figure, the explosive core 2 is wrapped on the outer surface of the cotton yarn carrier line 1, the plastic film 3 is wrapped on the outer surface of the explosive core 2, the outer surface of the plastic film 3 is periodically wound to one end in an alternating and continuous mode by using a fiber line I4, the number of turns of the forward winding section I8 and the number of turns of the reverse winding section I9 are the same, the number of turns of the winding section I9 are the same, the explosive cable 12 is made into a three-core explosive cable bundle by adopting three explosive cables 12 in parallel, the cylindrical bodies of the explosive cable 12 in the three-core explosive cable bundle are distributed in a tangent mode, the fiber line II6 is wound to one end in an alternating and continuous mode by adopting a fiber line II10 and a fiber line II11, the winding direction of the fiber line II6 is the same as the winding direction of the fiber line I4, and the outer surface 7 of the three-core explosive cable bundle after winding is made of a flexible sealing material is provided with a shell 7.
The multi-core combination is adopted to be closely arranged together, energy superposition can be generated between adjacent detonating cords during blasting, and an energy gathering effect is formed, and the energy gathering effect is far greater than the tangential acting mechanical energy generated by a single-core product, thereby being beneficial to blasting acting or cutting operation.
Example 3
Fig. 5 is a schematic diagram of the seven-core structure of the detonating cord of the multi-core structure of the present invention, and fig. 6 is a side view of fig. 5. In the figure, the detonating cord of the seven-core structure is characterized in that the outer surface of a cotton yarn carrier line 1 is wrapped with a detonating cord 2, the outer surface of the detonating cord 2 is wrapped with a plastic film 3, the outer surface of the plastic film 3 is wound to one end periodically in an alternating and continuous mode by a fiber line I4, the number of turns of the forward winding section I8 and the number of turns of the reverse winding section I9 are the same, the detonating cord 12 is made of the same number of turns of the forward winding section I8 and the reverse winding section I9, seven detonating cords 12 are formed into a seven-core detonating cord bundle in parallel by adopting seven detonating cords 12, one detonating cord 12 is selected as a circle center, the rest detonating cords 12 are uniformly distributed around the circumference of a cylinder of the detonating cord 12, the outer surface of the fiber line I4 on the detonating cord 12 is also wrapped with a thermoplastic layer 5, the surface of the seven-core detonating cord bundle is wound to one end periodically in an alternating and continuous mode by a fiber line II10 and a reverse winding section II11, the number of turns of the forward winding section II10 and the reverse winding section II11 are the same, the number of turns of the detonating cord II is the same as the number of turns of the seven-core detonating cord is made of the detonating cord 6, and the detonating cord is wound to one end 7 in the same direction of the fiber line 7 is wound to the outer surface of the thermoplastic layer 7.
Thus, by combining the common standardized finished products into a bundle, higher explosion energy can be obtained to detonate the weak industrial explosive, and single-core multiple energy can be obtained according to the design requirement of the weak industrial explosive.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (4)
1. Detonating cord with multicore structure, including detonating cord (12) and fiber line I (4) of coiling to one end on detonating cord (12) surface, its characterized in that: the detonating cord (12) adopts many detonating cords (12) to form the multicore detonating cord bundle in parallel, the multicore detonating cord bundle surface is with fiber line II (6) adoption forward winding section II (10) and reverse winding section II (11) are in turn, the periodic one end coiling of continuous mode, the number of turns of forward winding section II (10) and reverse winding section II (11) are the same, the same multicore detonating cord of circle density preparation, and the surface package of multicore detonating cord after the coiling has casing (7), fiber line II (6) are the same with fiber line I (4) coiling direction to the direction of one end coiling, detonating cord (12) surface still encapsulates thermoplastic layer (5).
2. A detonating cord having a multi-core structure according to claim 1, wherein: the multi-core detonating cord consists of two or three detonating cords (12), and cylinders of adjacent detonating cords (12) in the multi-core detonating cord are distributed tangentially.
3. A detonating cord having a multi-core structure according to claim 1, wherein: the multi-core detonating cord consists of seven detonating cords (12), one detonating cord (12) is selected as a circle center, and the rest detonating cords (12) are uniformly distributed around the circumference of the cylinder of the detonating cord (12).
4. A detonating cord having a multi-core structure according to claim 1, wherein: the shell (7) is a thermoplastic layer or a flexible metal material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271407.0A CN109836301B (en) | 2019-04-04 | 2019-04-04 | Detonating cord with multicore structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910271407.0A CN109836301B (en) | 2019-04-04 | 2019-04-04 | Detonating cord with multicore structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109836301A CN109836301A (en) | 2019-06-04 |
| CN109836301B true CN109836301B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910271407.0A Active CN109836301B (en) | 2019-04-04 | 2019-04-04 | Detonating cord with multicore structure |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115215712A (en) * | 2022-06-29 | 2022-10-21 | 北京宇航系统工程研究所 | Flexible detonating cord cutting separator of unblock function redundancy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1582903A (en) * | 1977-01-26 | 1981-01-14 | Du Pont | Explosive connecting cord and cord-manufacturing method and apparatus |
| CN1124239A (en) * | 1994-12-07 | 1996-06-12 | 长沙矿山研究院 | Inductive explosion non-directional industrial explosion-guiding cable |
| CN201770626U (en) * | 2010-07-02 | 2011-03-23 | 高要市南虹化工有限公司 | All-plastic covered primacord |
| CN103772079A (en) * | 2014-01-13 | 2014-05-07 | 云南燃二化工有限公司 | Permissible detonating cord for coal mine, and cord maker thereof |
| CN209721989U (en) * | 2019-04-04 | 2019-12-03 | 陕西渭南庆华化工有限公司 | A kind of primacord with multicore structure |
-
2019
- 2019-04-04 CN CN201910271407.0A patent/CN109836301B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1582903A (en) * | 1977-01-26 | 1981-01-14 | Du Pont | Explosive connecting cord and cord-manufacturing method and apparatus |
| CN1124239A (en) * | 1994-12-07 | 1996-06-12 | 长沙矿山研究院 | Inductive explosion non-directional industrial explosion-guiding cable |
| CN201770626U (en) * | 2010-07-02 | 2011-03-23 | 高要市南虹化工有限公司 | All-plastic covered primacord |
| CN103772079A (en) * | 2014-01-13 | 2014-05-07 | 云南燃二化工有限公司 | Permissible detonating cord for coal mine, and cord maker thereof |
| CN209721989U (en) * | 2019-04-04 | 2019-12-03 | 陕西渭南庆华化工有限公司 | A kind of primacord with multicore structure |
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| Publication number | Publication date |
|---|---|
| CN109836301A (en) | 2019-06-04 |
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