CN111649635B - Device for controlling the sequence of multiple-point detonation of detonating cord - Google Patents
Device for controlling the sequence of multiple-point detonation of detonating cord Download PDFInfo
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- CN111649635B CN111649635B CN202010564670.1A CN202010564670A CN111649635B CN 111649635 B CN111649635 B CN 111649635B CN 202010564670 A CN202010564670 A CN 202010564670A CN 111649635 B CN111649635 B CN 111649635B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/04—Arrangements for ignition
- F42D1/045—Arrangements for electric ignition
- F42D1/05—Electric circuits for blasting
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a device for controlling multipoint explosion propagation sequence of detonating cord, which comprises a substrate, wherein a copper-clad plate and an electrode plug are arranged on the substrate, a plurality of rows of metal bridge membranes are arranged in the middle of the substrate, the metal bridge membranes are sequentially connected to form an explosion network, a plurality of explosion propagation drugs are arranged on each row of metal bridge membrane, a positive electrode and a negative electrode are arranged on the substrate, the positive electrode and the negative electrode are connected with the center of the explosion network, different metal materials are selected for the metal bridge membranes in different rows or different bridge membrane thicknesses are selected under the condition that the metal materials are certain, and the sequential explosion propagation is achieved through the difference of the resistivity of the metal bridge membranes; according to the invention, through nonlinear distribution characteristics of resistivity under micrometer scale level, the sequential performance of multipoint explosion propagation of the detonating cord is realized by controlling the material, thickness and length of the metal film, the sequential performance of explosion propagation is manually controllable, the intelligent explosion propagation mode is realized, and the disorder problem of the prior explosion propagation is solved.
Description
Technical Field
The invention belongs to the field of multipoint explosion propagation of detonating cords, and particularly relates to a device for controlling multipoint explosion propagation of the detonating cords.
Background
With the application and development of the controlled blasting technology, particularly the requirements of the multi-point blasting technology for mines and buildings, the blasting connection mode is more and more complex, the multi-point blasting technology is widely applied, and the research on the blasting network is also continuous and deep. In the case of the conventional implementation, the time jitter is in the order of ms for the scenario that the explosion-guiding sequence needs to be precisely controlled. Before that, factors influencing the detonation output sequence of a plurality of explosion propagation lines mainly comprise the explosion speed of the explosive, the deviation of the explosion speed in the explosion propagation process, the explosion propagation distance deviation and the like. Detonation transit time control of explosive network charges is one of the keys to the design of explosive network systems, e.g., systems requiring multipoint sequential detonations must control the sequencing of the multipoint detonation outputs. In order to obtain a reliable performance explosive network, the time series of explosions in the explosive network must be studied.
Disclosure of Invention
The invention provides a device for controlling the multipoint explosion propagation sequence of a detonating cord, which solves the problem of the explosion propagation sequence during multipoint explosion.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The device for controlling the multipoint detonating sequence of the detonating cord comprises a substrate, wherein a copper-clad plate and an electrode plug are arranged on the substrate, a plurality of rows of metal bridge membranes are arranged in the middle of the substrate and are sequentially connected to form a detonation network, a plurality of detonating agents are arranged on each row of metal bridge membrane, a positive electrode and a negative electrode are arranged on the substrate and are connected with the center of the detonation network, different metal materials are selected by the metal bridge membranes in different rows or different bridge membrane widths and bridge membrane thicknesses are selected under the condition that the metal materials are certain, and the sequential detonating is achieved through the difference of the resistances of the metal bridge membranes and the distance difference between the metal bridge membranes and the center of the detonation network.
Furthermore, three booster charges are arranged on each row of metal bridge membranes.
Further, the metal bridge film is provided with three rows, and the metal material is one or a combination of a plurality of aluminum materials, copper materials and chromium materials.
The invention adopts the formulaAnd the control variable method is adopted to realize the control of the multipoint explosion propagation sequence of the detonating cord. When a single metal is selected and the cross sectional areas are certain, namely S is equal, R can be proportioned by changing the length, and the aim of sequential explosion propagation is fulfilled. When different metals are adopted, the lengths and the thicknesses of the metals are equal, namely the thicknesses of the metals are equal, so that the resistance effect is not needed to be considered, and the aim of serialization can be achieved by selecting metal materials with different resistivity.
Three different metals, copper has the resistivity: 1.678 x 10 (-8) Ω·m, the resistivity of aluminum is: 2.6548 x 10 (-8) Ω·m, the resistivity of chromium is 12.9 x 10 (-8) Ω·m;
In order to ensure the sequential performance of explosion propagation, if three metals with different resistivity are adopted, the resistance ratio copper is achieved: aluminum: chromium=1:3:5, the thickness ratio is set to 2:1:3.
In order to ensure the sequence of the explosion propagation, if the metal materials are all aluminum materials, the thickness of the film is controlled between 1 and 10 mu m.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through nonlinear distribution characteristics of resistivity under micrometer scale, different metal materials are selected under a certain length, the thickness of the metal materials is controlled according to a certain proportion or the same metal materials are selected, and the sequential performance of detonating cord multipoint detonating is realized through two methods of controlling the thickness of the metal film to be different, so that the sequential performance of detonating cord detonating is manually controllable, the intelligentization of the detonating mode is realized, and the problem of disorder or large time jitter of the prior detonating is solved.
Drawings
FIG. 1 is a front view of a detonating cord according to the present invention;
FIG. 2 is a graph of the resistivity of metallic Al from which the thickness of the metallic bridge film when aluminum is used for the detonating cord can be determined.
In the figure, 1 and 3 are positive electrodes, 2 and 4 are negative electrodes, 5 is a copper-clad plate, 6 is an electrode plug, 7 is a first row of metal bridge films, 8 is a second row of metal bridge films, and 9 is a third row of metal bridge films.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying examples, and it is apparent that the described examples are only some, but not all, examples of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
With the development of micro/nano technology, the geometric scale or microstructure scale of the metal bridge film in the MEMS transduction element is gradually reduced from a macro scale to a micro, submicron or even nano scale, the room temperature resistivity of the MEMS transduction element often shows an obvious scale effect, namely when the metal material structure is below the submicron level, the resistivity of the MEMS transduction element is obviously and steeply increased, the delay effect can be achieved according to the change of the thickness of the metal material, and a theoretical basis is provided for controlling the resistivity of the MEMS transduction element to achieve the sequence explosion effect.
When the metal bridge film method reaches the geometric scale below the micrometer scale, three electron scattering mechanisms may occur, namely isotropic scattering of electrons by phonon defects and point defects, scattering of electrons by plane potential (grain boundary), and scattering of electrons by surface (film surface). Wherein, the interface scattering changes the electron mean free path along with the change of the bridge film thickness, thereby changing the metal bridge film resistivity. Therefore, the sequential performance of multipoint explosion propagation of the detonating cord is realized through the thickness and the length of the metal film by the nonlinear distribution characteristic of the resistivity under the micrometer scale.
When the metal bridge film thickness reaches the micro-nano scale, the bridge film resistivity ρ FS increases, and the bridge film resistivity ρ FS thereof is not linear with the film thickness.
Referring to fig. 2, taking a metal Al thin film bridge film as an example, the change of the thin film thickness and the resistivity thereof has a nonlinear decreasing trend, namely, the film thickness is obviously reduced along with the increase of the bridge film thickness, and the film thickness gradually tends to the metal Al bulk resistivity (2.75 mu omega cm); when the thickness is less than 300nm, the resistivity starts to rise steeply, reaches 7.89 mu omega cm at 200nm, increases by nearly 200%, and the trend is obvious.
In order to solve the problem of explosion propagation sequence, the invention mainly achieves the output sequence through the detonating cord resistance, thereby improving the explosion efficiency.
The positive electrode 1 and the positive electrode 3 are connected with the positive electrode of the detonation network, and the negative electrode 2 and the negative electrode 4 are connected with the negative electrode of the detonation network according to the output point setting of the plane shown in the figure 1; the first row of metal bridging membranes 7, the second row of metal bridging membranes 8 and the third row of metal bridging membranes 9 are connected with each other to form a detonation network; three explosion transfer agents are arranged between the single-row metal bridge membranes, and delay of the three explosion transfer agents is negligible; by controlling the material selection, material thickness or material width of the three rows of metal bridge membranes, the resistance of the three rows of metal bridge membranes can be changed, so that the differential detonation velocity of the three rows of metal bridge membranes can be controlled.
Example 1:
In this embodiment, the metal bridge film is an aluminum film (Al);
The positive electrode 1 and the positive electrode 3 are arranged according to the output points of the plane shown in the figure 1 and are connected with the positive electrode of the detonation network, the negative electrode 2 and the negative electrode 4 are connected with the negative electrode of the detonation network, the delay of three explosive transfer agents among the single-row metal bridge membranes is negligible, and only the delay among the three rows of the first-row metal bridge membranes 7, the second-row metal bridge membranes 8 and the third-row metal bridge membranes 9 is changed to enable the delay to meet the requirement. The three rows of achieving sequential booster bursts can be achieved by varying their resistivity. In this embodiment, the lengths of the metal materials and the explosion propagation of the three rows are the same, so only the length of the metal material of each row needs to be considered. The thickness is too low, so that the scale effect of the metal bridge film can be caused, the resistivity of aluminum is 2.6548 x 10 (-8) omega.m, but when the bridge film is thinned and the thickness is smaller than 300nm, the resistivity begins to rise steeply, and reaches 7.89 mu omega.cm at 200nm, the resistivity is increased by almost 200%, the contrast is obvious, and the explosion propagation is also influenced. According to the resistance formula It is known that when the metal materials are the same and the length is constant, if the ratio of the resistances is to be controlled, the cross-sectional area S can be controlled, and then the thickness of the metal bridge film 7 in the first row is selected to be 2.0 μm, the thickness of the bridge film 8 in the second row is selected to be 4.0 μm, and the thickness of the bridge film 9 in the third row is selected to be 6.0 μm, so that the ratio of the resistances is 1:2:3. The conductivity of the resistor is changed by changing the size of the resistor, and the larger the resistor is, the worse the conductivity is, the slower the explosion propagation rate is, so that the explosion propagation sequence is a third row, a second row and a first row in sequence, and the sequence of the explosion propagation of the resistor can be realized. The method is used in the same way as the metal material.
Example 2:
in this embodiment, the metal bridge film is selected from copper film (Cu), aluminum film (A l) and chromium film (Cr)
The positive electrode 1 and the positive electrode 3 are arranged according to the output points of the plane shown in the figure 1 and are connected with the positive electrode of the detonation network, the negative electrode 2 and the negative electrode 4 are connected with the negative electrode of the detonation network, the delay of three explosive transfer agents among the single-row metal bridge membranes is negligible, and only the delay among the three rows of the first-row metal bridge membranes 7, the second-row metal bridge membranes 8 and the third-row metal bridge membranes 9 is changed to enable the delay to meet the requirement. The three rows of achieving sequential booster bursts can be achieved by varying their resistivity. In this embodiment, the length of each row of metal material is controlled to be constant, the first row of metal is set to be copper (Cu), and the resistivity is 1.678 x 10 (-8) Ω·m; the second row of metals is set as aluminum (A l) with resistivity of 2.6548 x 10 (-8) Ω·m; the third row of metals is set to chromium (Cr) with resistivity of 12.9x10Ω·m (-8).
According to the resistance formulaIt is known that the cross-sectional area S can be controlled if the resistivity is known at a given length and the ratio of the resistances is to be controlled. It is calculated that if the ratio of the resistances is controlled to be 1:3:5, the thickness ratio of the resistances is selected to be 2:1:3, and the larger the resistance is, the worse the conductivity is, the slower the explosion propagation rate is, so that the explosion propagation sequence is sequentially copper (Cu) -aluminum (Al) -chromium (Cr). This allows to achieve a sequence of resistive detonations with time jitter on the order of ps or fs.
The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Any partial modification or replacement within the technical scope of the present disclosure by any person skilled in the art should be included in the scope of the present disclosure.
Claims (1)
1. The device for controlling the multipoint explosion propagation sequence of the detonating cord is characterized by comprising a substrate, wherein a copper-clad plate and an electrode plug are arranged on the substrate, a plurality of rows of metal bridge membranes are arranged in the middle of the substrate, the metal bridge membranes are sequentially connected to form an explosion network, a plurality of explosion propagation medicines are arranged on each row of metal bridge membrane, a positive electrode and a negative electrode are arranged on the substrate, the positive electrode and the negative electrode are connected with the center of the explosion network, different metal materials are selected for the metal bridge membranes in different rows or different bridge membrane widths and bridge membrane thicknesses are selected under the condition that the metal materials are certain, and sequential explosion propagation is achieved through the difference of the resistances of the metal bridge membranes and the difference of the distances between the metal bridge membranes and the center of the explosion network;
Three explosion-transmitting drugs are arranged on each row of metal bridge membranes;
The metal bridge film is provided with three rows, and the metal material is one or a combination of a plurality of aluminum materials, copper materials and chromium materials.
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| CN202010564670.1A CN111649635B (en) | 2020-06-19 | 2020-06-19 | Device for controlling the sequence of multiple-point detonation of detonating cord |
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| CN111649635B true CN111649635B (en) | 2024-11-22 |
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| CN212902913U (en) * | 2020-06-19 | 2021-04-06 | 西安工业大学 | Sequence multi-point detonation network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ZA939248B (en) * | 1992-12-18 | 1994-06-20 | Aeci Ltd | Initiation of blasting |
| CN100478641C (en) * | 2004-02-19 | 2009-04-15 | 施卢默格控股有限公司 | Detonator assembly |
| CN102249830B (en) * | 2011-06-21 | 2013-01-02 | 南京理工大学 | Silicon-cup energy-accumulation Al/CuO composite film ignition bridge and ignition bridge array |
| RU2546914C1 (en) * | 2014-01-09 | 2015-04-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Северо-Кавказский горно-металлургический институт (государственный технологический университет) | Device of initiation of explosive charges |
| CN103954180A (en) * | 2014-04-23 | 2014-07-30 | 中国工程物理研究院化工材料研究所 | Igniter electrode of detonation valve |
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