RU2645062C1 - Connecting unit for blasting initiation devices - Google Patents

Abstract

FIELD: blasting operations.

SUBSTANCE: invention relates to blasting operations and can be used in the initiation and transmission lines of a detonation signal. Connecting unit comprises a cylindrical sleeve with a closed end with the possibility of locating and fixing the detonator, clamping elements for the initiation signal transmission lines surrounding the detonator working end. Clamping elements are made in the form of half-lines counter-shifted in the transverse plane with respect to each other and connected to cylindrical half-channels to locate the initiation signal transmission lines arranged symmetrically on the outer side of the sleeve and parallel to the detonator axis. Each semi-channel is provided with a pressure roller mounted on a ring rigidly fixed to the cylindrical sleeve. Rounded ends of the half-channels end outside the end of the detonator.

EFFECT: simplifies the design, reduces the size, increases the reliability of the initiation system.

1 cl, 5 dwg

Description

The invention relates to blasting and can be used in the lines of initiation and transmission of the detonation signal.

Known connecting block (US patent No. 5171935, publ. 15.12.1992). A connecting device in which the detonator capsule located at the end of the donor line is in a signal-transmitting communication with a plurality of signal-receiving shock tube lines. This device includes a body part having a channel for receiving the detonator capsule and an element hooking the tube that defines a straight cut circuit for holding one or more signal transmission lines in a signal signal transmitting with the output end of the detonator capsule. Since the slot is straight, the tubes located here take a straight line, i.e. an unbent configuration within the aforementioned slot. The tubes are in transverse connection with the axis of the detonator.

The disadvantage of this device is the design complexity, as well as the increased insertion force into it of the lines of shock wave tubes.

Known connecting block (US patent No. 4187780, publ. 02/12/1980). A bracket-like connecting device for installing a signal-receiving line in a signal-transmitting communication with a detonator capsule. This connecting device is mainly intended for establishing the signal receiving part of the acceptor line in close parallel connection with the detonator capsule.

The disadvantage of this device is the design complexity, as well as a limited number of lines of shock wave tubes.

Known connecting block for subversive initiating devices (RF patent No. 2169721, publ. 06/27/2001, bull. No. 18). The connecting block contains a clamping element that interacts with the end of the housing element for signal transmission in order to create an arched groove between them to hold the line into which one or more lines are received to transmit the signal from the output end of the detonator. The clamping element has a decreasing thickness in the direction from its proximal end to at least its midpoint and preferably a non-decreasing width from its proximal end to the open end of the groove for holding the line.

The disadvantage of this invention is the bulkiness of the design, which entails the expansion of fragments of the block in the explosion with a possible damage to the transmission lines of initiation.

A known connecting device for a transmitter of the signal for initiating an explosion (patent RU No. 2153142, publ. 20.07.2000, bull. No. 20). A connecting device for installing the detonator in a signal transmitting communication with the signal holding line receives the detonator in the sleeve element. The line-engaging element is connected to the sleeve element and interacts with the sleeve element to form a contour of the slot between them, where the signal receiving line is located. The dimensions and shape of the slot are made in such a way as to give the signal receiving line into the slot a wavy shape. The connecting device can be used individually or in combination with a tail connector in order to fix the donor line in transmitting the signal of communication with the input wire of the detonator.

The disadvantage of this invention is the cumbersome design, which entails the expansion of fragments of the block in the explosion with a possible defeat of the lines of initiation.

Known connecting block for subversive initiating devices adopted for the prototype (US patent No. 5204492 A, publ. 1993.04.20). The connecting block is made in the form of a cylindrical sleeve into which the detonator is inserted and fixed. The block contains two parts. The first part comprises a detonator unit with a closed end for accommodating the detonator. The second part contains clamping elements mounted on the specified connecting block, which surround the working end of the detonator. These clamping elements, when locked, form a gap with the closed end of the detonator, into which transmission lines of initiating signals can be inserted. The clamping elements can be made with locking elements in the form of latches of various types.

The disadvantage of this device is the design complexity due to the presence of movable elements in the form of latches and cumbersomeness, which entails the expansion of fragments of the block in an explosion with a possible damage to the initiation lines.

The technical result of the invention is to simplify the design and reduce the bulkiness of the device with increasing the reliability of the initiation system.

The technical result is achieved by the fact that in the connecting block for subversive initiating devices containing a cylindrical sleeve with a closed end with the possibility of placing and fixing the detonator, the clamping elements for transmission lines of the initiating signals surrounding the working end of the detonator, according to the invention, the clamping elements are made in the form of counter displaced in transverse plane relative to each other of semi-holes connected to cylindrical half-channels for placing transmission lines of initiating signals, located symmetrically on the outer side of the sleeve and parallel to the axis of the detonator, each half-channel is equipped with a pressure roller mounted on a ring rigidly mounted on a cylindrical sleeve, and the rounded ends of the half-channels end outside the end of the detonator.

The technical result is also achieved by the fact that the material of the cylindrical sleeve consists of a synthetic organic polymer material, for example, a material selected from the group consisting of polyethylene, polypropylene, polybutylene and a styrene butadiene acrylonitrile copolymer.

The connection block for subversive initiating devices is illustrated by drawings, where in FIG. 1 shows a device, side view, in FIG. 2 shows a device, a longitudinal section with the superposition of adjacent half-channels, in FIG. 3 shows a cross-section along the pinch rollers with a superposition of the projection of the adjacent pinch ring, in FIG. 4 shows a longitudinal section of a device with a detonator and transmission lines of initiating signals superimposed with projections of lines from neighboring half-channels, FIG. 5 shows a cross-section along pinch rollers with a detonator and transmission lines of initiating signals with a projection of an adjacent clamping ring, where:

1 - a cylindrical sleeve with a closed end for the detonator 6 with half-holes 2, made on both sides towards each other with an offset in the transverse plane;

2 - half-grooves of clamping elements with a width sufficient for free rotation of the pinch rollers 4, made towards each other with an offset in the transverse plane;

3 - cylindrical half-channels of clamping elements with a diameter sufficient to extend the transmission lines 7 of the initiating signals connected to the half-streams 2;

4 - pinch rollers installed with the possibility of entering the half-grooves and cylindrical half-channels 3 and pressing the transmission lines 7 of the initiating signals for accurate positioning relative to the detonator;

5 - rings of the pressure rollers 4, rigidly mounted on the cylindrical sleeve 1, a variant with removable rings is possible;

6 - detonator with an initiating line 7 included in it, for example, a shock wave tube;

7 - transmission lines of initiating signals, for example, shock wave tubes.

Connection blocks for blasting initiators usually require a certain amount of force when inserting lines to transmit a signal into the groove to hold the line, as if the gap at the entrance to the groove is made too large, the retained lines are too easily unintentionally removed from the groove to hold the line under the force exerted by them during the installation of the explosive network. The problem of lateral insertion force increases as connection blocks are used outdoors in various weather conditions and the thermoplastic clamp or gripping element becomes stiffer at low temperatures, requiring more effort for lateral line insertion. Such significant insertion forces cause high localized bending stresses in the clamp element, especially at its base or near end, where the clamp is attached to the housing of the connecting block. On the other hand, if the composition of the plastic is changed to improve flexibility at low temperatures in order to reduce the force required for insertion at low temperatures, the clamp or gripping element is too easily bent and will deform when the connection block is used at higher temperatures. The latter situation may lead to the failure of the capture element or clamp for holding the lines for transmitting a signal precisely located at the output end of the detonator, thereby reducing the possibility of reliable initiation of signal lines that are held in the junction block. In addition to accurately positioning the held lines for signal transmission, the pickup element should be used to protect the lines for transmitting signal 7 from shrapnel damage caused by detonator explosion. This goal can be achieved by increasing the mass of the capturing element in order to enhance protection against shrapnel. However, with such an increase in mass, the rigidity of the gripping element increases and the problem of lateral insertion is exacerbated. Using the proposed design of the connecting block will dramatically reduce the effort of introducing the initiating lines while guaranteeing the exact positioning of these elements relative to the detonator.

The connection block for subversive initiating devices consists of the following basic elements. A cylindrical sleeve 1 with a closed end for accurate placement and reliable fixation of the detonator 6 inside it with an initiation line included in it, for example, a shock wave tube. Half-grooves 2 of clamping elements are made in the body of the cylindrical sleeve 1, connected and passing into cylindrical half-channels 3 of the clamping elements, rounded at the end in the body of the sleeve 1 to facilitate threading through them the initiation lines 7. The cylindrical half-channels 3 and half-holes 2 are not made along the entire length of the sleeve 1 They are made counter with displacement in the transverse plane relative to each other of semi-grooves 2 with cylindrical half-channels 3 to accommodate the transmission lines of the initiating signals 7. The rounded ends of the half-circle s 3 end beyond the end of the detonator 6 to ensure uniform initiation of all the lines 7 from 6 detonator, as with deviations, an uneven operation is possible, which can lead to the formation of failures in the explosive network. In the immediate vicinity of the working end of the detonator 6, the pressure rollers 4 are mounted on the rings 5 for rotation. The pressure rollers 4 are received with a diameter sufficient to clamp each transmission line 7 of the initiating signals to the inner surface of the cylindrical channel 3. This solution provides accurate positioning of the transmission line 7 initiating signals relative to the detonator 6 in order to ensure reliable detonation. As the material of the cylindrical sleeve 1, you can use synthetic organic polymeric material, for example, selected from the group consisting of polyethylene, polypropylene, polybutylene and a styrene butadiene acrylonitrile copolymer. These materials have proven themselves in the work of connecting blocks of all types. In this case, to highlight different decelerations, it is possible to color the bushings in different colors corresponding to a certain deceleration.

To increase the reliability of fixing the transmission lines 7 of the initiating signals, several rows of rings 5 with pressure rollers (not shown conditionally) can be installed along the length of the cylindrical sleeve 1.

The procedure for using the connection block for subversive initiating devices is as follows. In a cylindrical sleeve 1 with a closed end, the detonator 6 is inserted in the factory and fixed, for example, using a friction cap (not shown conditionally). In this case, an initiation line, for example, a shock wave tube, was previously introduced into detonator 6. Further, this assembly is packaged in the required packaging and transported in compliance with the required safety measures to the place of blasting. At the place of blasting, the surface blast network elements are assembled in accordance with the blast network installation diagram. For mounting elements of a surface explosive network, transmission lines 7 of initiating signals, for example, shock wave tubes are inserted and pulled to the desired depth through cylindrical half-channels 3 of clamping elements. Due to the pressure rollers 4, which are installed with the possibility of entering the cylindrical half-channels 3, the transmission lines 7 are clearly positioned relative to the detonator 6. The remaining elements of the surface explosive network are mounted in the above sequence. After the evacuation of personnel produce an explosion. Due to the use of oncoming, displaced relative to each other cylindrical half-channels 3, one detonator 6 can be used to initiate a larger number of transmission lines 7, which will reduce the cost of blasting.

The use of a connection block for subversive initiating devices provides the following advantages:

- simplification of the design of the device;

- reducing the bulkiness of the device;

- improving the reliability of the initiation system.

Claims (2)

1. The connecting unit for subversive initiating devices, containing a cylindrical sleeve with a closed end with the possibility of placing and fixing the detonator, clamping elements for transmission lines of initiating signals surrounding the working end of the detonator, characterized in that the clamping elements are made in the form of counter-biased in the transverse plane relative to the other half-holes connected with cylindrical half-channels for placing transmission lines of initiating signals located symmetrically on the outer sides e bushings and parallel to the axis of the detonator, with each half-channel provided with a pressure roller mounted on a ring rigidly mounted on the cylindrical sleeve, and the rounded ends of the half-channels end outside the end of the detonator. 2. The connecting block according to claim 1, characterized in that the material of the cylindrical sleeve consists of a synthetic organic polymer material, for example, a material selected from the group consisting of polyethylene, polypropylene, polybutylene and a styrene butadiene acrylonitrile copolymer.

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