RU2247923C1 - Blasting logical circuit - Google Patents

Abstract

FIELD: discrete transducers on detonation logical elements for remote authorized blast of explosive charges.

SUBSTANCE: the blasting logical circuit has a board with two inputs and one output interconnected by detonating rods forming a longer and shorter branches between the first input and the output with joining-on of the second input to the shorter branch. Actuating elements disturbing the detonation coupling are installed at the joints of the longer and shorter branches and the second input. The detonating rods are positioned on both sides of the board, and through holes are made in the board, the actuating elements disturbing the detonation coupling are made in the form of a receiving charge and an inert obstacle adjoining it and located on the side of the destructed detonating rod for motion under the action of the blast products of the receiving charge, the detonation ducts and the receiving charge are made of precipitated explosive.

EFFECT: reduced dimensional and mass characteristics.

2 cl, 4 dwg, 1 tbl, 1 ex

Description

The invention relates to the field of blasting and can be used in devices authorized remote detonation of explosive charges (EXPLOSIVES), and in particular in discrete converters on detonation logic elements.

Known explosive logic diagram, in particular explosive logic element And, containing two inputs and one output, made in the form of detonation rods of explosives with a critical detonation diameter of about 0.3 mm and a detonation speed of 7.8 km / s (AS 1177849, F 42 B 3/10, priority from 05.11.90 g, publ. 30.11.92, Bull. No. 44).

The well-known logical element is equipped with an inert partition and an explosive receiving charge placed behind the inert partition before exiting, while the length L of the explosive receiving charge is determined from the relation L = 2D × Δτ, where D is the detonation velocity of the explosive charge, and Δτ is the admissible input initiation time providing passing an explosive signal to the exit. A well-known logical element performs the function of a logical element AND only with the simultaneous involvement of two inputs.

Another explosive logic circuit is known - the logical element And (US Pat. US 3753402, F 42 D 1/00, publ. 08.21.73), selected as a prototype of the claimed logic circuit as the closest in technical essence and the number of similar features. The well-known explosive logic circuit is a circuit board made of inert material with two inputs (first and second) and one output, interconnected by detonation rods, forming a long and short branch between the first input and output, with the second input docked to a short branch. These rods are made by extruding grooves and grooves on one of the surfaces of the board and filling them with plastic secondary explosive. This circuit also contains two actuators that destroy the detonation coupling, one of which is located at the junction of the long and short branches, and the other at the junction of the short branch and the second entrance. These actuators are made in the form of T-shaped destructible intersections of detonation rods, while in the joints of the rods made with narrowing. The cross section of the detonation rod in the narrowing is selected so that it is sufficient for the explosive signal to pass in the forward direction and not enough for the signal to propagate in the transverse direction. An output signal occurs when activating signals are applied to both inputs. The table shows the state matrix of the function performed by this circuit.

Table input 1 input 2 exit 1 1 1 1 0 0 0 1 0 0 0 0

The disadvantage of analog and prototype is the limited use due to the large size.

The challenge in this technical field is to miniaturize the dimensions of explosive logic circuits and elements, as well as increase their reliability and speed of operation.

The technical result of the claimed invention is to reduce the overall weight characteristics.

The specified technical result is achieved due to the fact that in an explosive logic circuit including a board with first, second inputs and one output, interconnected by detonation rods forming between the first input and output a long and short branches with a second input to the short branch, equipped with actuators destroying the detonation coupling located at the junctions of the long with the short branches and the short branches with the second input, detonation rods are installed on both sides of the board, and through holes are filled in which actuators are installed that destroy the detonation coupling, which are the receiving charge and an inert barrier adjacent to it, placed on the side of the detonation rod being destroyed, with the possibility of moving the receiving charge under the action of explosion products, the detonation bars and the receiving charge being made of deposited explosive. The optimal thickness of the receiving charge h is chosen equal to 1/3 of the thickness H of the inert barrier, where 1.1 <H <1.8 mm.

The implementation of detonation channels from two opposite sides of the board allows you to achieve a compact circuit and reduce its dimensions.

The implementation of through holes in the board with the placement of elements that destroy the detonation coupling, avoids the joints of the detonation rods on both sides of the board and compactly place the explosive logic circuit, which leads to a decrease in size.

Execution of actuating elements destroying the detonation coupling in the form of a receiving charge and an inert barrier adjacent to it, placed on the side of the detonation rod being destroyed with the possibility of movement under the action of explosion products, makes it possible to receive an explosive signal from a detonation rod placed on one side of the board and move the inert barrier with the purpose of breaking the detonation rod placed on the other side of the board with the minimum dimensions of the detonation rods, which reduces the dimensions of the circuit. The implementation of detonation rods and the receiving charge from the deposited explosive increases the reliability of the logic circuit operation, since the formation of explosive logic, in this case, is carried out in one technological method, which practically avoids the occurrence of latent defects in comparison with the connection of the rods with each other when forming the logical circuit from plastic explosives. The precipitated explosive has a small critical diameter, which allows to reduce the overall weight characteristics of the logic circuit formed using the precipitated explosive by 4 times in comparison with the logic circuit formed from a plastic explosive.

The choice of the thickness of the receiving charge is based on the fact that the energy of the products of its explosion should be sufficient to move an inert barrier and, at the same time, insufficient to transfer an explosive pulse to a detonation rod to be torn so that detonation does not occur in the latter.

An example of a specific implementation of the claimed device can serve as an explosive logic circuit And, presented in figure 1 and figure 2 (figure 1 is one side of the board, figure 2 is the back side of the board). Figure 3 schematically shows an actuator that destroys the detonation coupling by breaking a long branch. Figure 4 schematically shows an actuator that destroys the detonation coupling by breaking a short branch. Explanation of the figures:

1 - board

2 - input 1

3 - input 2

4 - exit

5 - a long branch in the form of a detonation rod BB

6 - a bar connecting the second input with a short branch

7 - a short branch in the form of a detonation rod BB

8 - actuating element that destroys the detonation connection of the first input and output through a long branch

9 - actuating element that destroys the detonation coupling of the first input and output through a short branch

10 - receiving charge

11 - inert barrier.

The explosive logic circuit is a 40 × 40 × 2 mm PVC board, on both sides of which, using the thermal vacuum deposition of explosives, detonation rods with a cross section of 1.0 × 0.4 mm ² are applied through a stencil. A long branch formed by one detonation bar connects the first input to the output and is located on one side of the board. On the same side of the board there is a detonation bar connecting the second input with an actuating element that destroys the detonation connection of the first input and output through a short branch. On the other side of the board, a short branch is made in the form of a detonation bar connecting the first input with an actuating element breaking the detonation connection of the first input and output through the long branch. At the junction of a short branch with a long and second entrance, two through holes are made in the circuit board, each ⌀ 4 mm, in which actuators are placed that break the detonation coupling, made like detonation rods, by the method of thermal vacuum deposition of explosives, in the form of explosive blocks 0.5 thick mm and an inert barrier of polymethyl methacrylate (plexiglass) 1.5 mm thick adjacent to the checker. An actuating element breaking a detonation bond through a short branch has an inert barrier installed on the side of the short branch and adjoins it. Another actuator has a long branch. The critical diameter of the detonation of the explosive thus deposited is 0.1 mm, and the critical thickness of the rod is 60 μm, which allows reducing the dimensions of the logic circuit by 4 times.

The scheme works as follows. The activation signal applied to the first input (pos. 2, Figs. 1, 2) is distributed in two directions along detonation rods of different lengths (pos. 5, 6, Figs. 1, 2). Due to the difference in the length of the detonation rods, the explosive signal traveling along the shorter bar (pos. 7, Fig. 2) will come to the actuating element (pos. 8, Figs. 1, 2) that destroys the long bar (pos. 5, Fig. 1) earlier than the explosive signal propagating along a long bar (pos. 5, Fig. 1), reaches the output (pos. 4, Fig. 1). Therefore, the explosive signal that reached the actuator (pos. 8, Fig. 1, 2) along the short bar (pos. 7, Fig. 2) activates the receiving charge (pos. 10, Fig. 3), and the products of its explosion move inert barrier (pos. 11, Fig. 3) towards the long bar (pos. 5, Figs. 1, 3) and destroy this long bar, thus preventing further transmission of the explosive signal along the long bar (pos. 5, Fig. .1) to the exit (pos. 4, Fig. 1). In this case, there will be no signal at the output. When applying the activating signal to the second input (pos. 3, Fig. 1), the explosive signal enters the detonation bar (pos. 7, Fig. 1) to the actuator (pos. 9, Fig. 1), which destroys the detonation coupling of the first input ( pos.2, Fig.1, 2) and output (pos.4, Fig.1) through a short detonation bar (pos.7, Fig.2). The receiving charge (pos. 10, Fig. 4) is triggered, and the products of its explosion move an inert barrier (pos. 11, Fig. 4) towards a short detonation rod (pos. 7, Figs. 2, 4), which destroys it and , thereby preventing the further propagation of the explosive signal along the short detonation rod (pos. 7, Fig. 1) to the output (pos. 4, Fig. 1). In this case, there will be no signal at the output.

When a triggering signal is applied to the first input (pos. 2, Figs. 1, 2) and the second input (pos. 3, Fig. 1), the explosive signal from the first input simultaneously propagates in two directions along a long detonation rod (pos. 5, Fig. .1) and a short detonation bar (pos. 7, Fig. 2). From the second input (pos. 3, Fig. 1), an explosive signal is supplied to the actuator (pos. 9, Figs. 1, 2), which destroys the short detonation bar (pos. 7, Fig. 2). Since the length of the detonation rod (pos.6, Fig.1) from the second input (pos.3, Fig.1) to the actuating element (pos.9, Fig.1, 2) is less than the length of the detonation rod (pos.7, Fig .2) from the second input to the actuating element (pos. 8, Figs. 1, 2), then the explosive signal from the second input (pos. 3 of Fig. 1) to the receiving charge (pos. 10, Fig. 4) of the actuating element ( pos. 9, Figs. 1, 2) arrives earlier and activates this receiving charge, the explosion products of which move an inert barrier (pos. 11, Fig. 4), which destroys the short detonation bar (pos. 7, Fig. 2). Thus, an explosive signal traveling along a short detonation rod reaches the point of destruction of the rod and does not propagate further. And the explosive signal traveling along a long detonation bar (item 5, figure 1) from the first input (item 2, figure 1, 2) unhindered reaches the output (item 4, figure 1). Since the cross section of detonation rods from the deposited explosive is much smaller than the rods from a plastic explosive (as in the prototype), less energy is required for their destruction. Therefore, the impact of the products of the explosion of the receiving charge (pos. 10, Figs. 3, 4) with a thickness of 0.5 mm is sufficient to move an inert barrier (pos. 11, Figs. 3, 4) with a thickness of 1.5 mm to destroy the detonation rod and the impossibility of initiating detonation in the destructible rod from an explosive pulse when the receiving charge is undermined (pos. 5, Fig. 1).

Thus, the logic circuit reduced by 4 times in terms of overall characteristics ensures the reliability of the transfer of the explosive pulse and speed with the authorized use of the charge and the impossibility of undermining it in case of emergency situations.

Claims (2)

1. An explosive logic circuit containing a circuit board with two inputs and one output, connected by detonation rods, forming between the first input and output a long and short branch with a second input docking to a short branch, while at the joints of a long with a short branch and a short branch with the second input, actuating elements are installed that destroy the detonation coupling, characterized in that the detonation rods are placed on both sides of the board, and through holes are made in the board, in which the performer is installed detonating bond destruction elements made in the form of a receiving charge and an inert barrier adjacent to it, placed on the side of a detonation rod being destroyed, with the possibility of moving the receiving charge under the action of explosion products, the detonation channels and the receiving charge being made of deposited explosive. 2. Explosive logic circuit according to claim 1, characterized in that the thickness of the receiving charge h is selected from the following ratio: h = 1 / 3H, where H is the thickness of the inert barrier; 1.1 <H <1.8, mm.

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