RU2086526C1 - Distribution block for low-power detonating cords - Google Patents

Abstract

FIELD: explosive technics in mining and building industries. SUBSTANCE: block contains cylindrical casing 1 in the form of barrel with perforated bottom 2. Upper part of casing 1 is constructed in the form of slot- separated blades 3. Blades are provided with radial protruding clamps 4 and are inserted into stop ring 5 in the form of barrel with through variable-width slot in bottom and flange 7 on the side opposite to bottom. Casing has flange 6 disposed at a distance from its upper part equal to blade length. Cross-section of blades 3 decreases with height. EFFECT: improved design. 3 dwg

Description

 The invention relates to surface wiring elements of weak-pulse initiating cords-waveguides (BW) of the type "Nonel" or shock tubes and can be used for mounting explosive networks during blasting in the mining industry, construction, etc. especially in cramped and energy-saturated conditions.

 The wiring block is designed for joint placement and fixing in the common housing of the detonator capsule with the primary (supply) segment of the joint vent and several secondary (divorceable) segments of the joint vent and, thus, obtaining their connection of standard quality, which does not change from external conditions and does not depend on qualification detonator.

 Known wiring system "Nonel Primadet" / 1 /, comprising a housing with a window in the wall, a slot for the detonator and holes for the input-output of the joint vent, equipped with a side latch-latch.

This design of the wiring block has the following disadvantages:
a window in the case does not fully protect the detonator from possible mechanical damage during operation;
the relatively small contact length of the detonator with the reconstitutable borehole provided by the housing design allows for a probability of failure;
the weak fixing ability of the latch-latch does not exclude its opening under the influence of insignificant external mechanical loads.

 The closest to the invention in technical essence and the achieved result is a wiring block made of plastic / 2 /, containing a cylindrical body in the form of a glass with a perforated bottom, the upper part of which is made in the form of petals separated by grooves, equipped with radial protrusions-grippers, and a retaining ring.

The disadvantages of the known wiring unit are as follows:
in case of accidental impact during operation of the retaining ring, its destruction is possible, leading to the release of the detonator capsule from the housing and, as a result, the failure of this element of the initiation system;
low-tech assembly during the installation of the initiation system, which requires fixing the ends of the assembly in the BC block, which is especially time-consuming at low temperatures.

 An object of the invention is to increase the reliability of the wiring unit and the manufacturability of its assembly during operation.

 The solution to this problem is achieved by the fact that in the known wiring unit containing a cylindrical body in the form of a glass with a perforated bottom, the upper part of which is made in the form of grooves separated by grooves, provided with radial protrusions-grippers, and the retainer ring, according to the invention, the housing is equipped with a flange placed at a distance of the length of the petal from its upper part, the petals are made with a section decreasing in height, and the retaining ring is made in the form of a glass with a through groove of variable width in the bottom and side, opposite to the bottom, equipped with a flange, the diameter of the opening of which is less than the diameter of the cavity of the glass.

 In FIG. 1 shows a wiring assembly; figure 2 design of the petals; figure 3 a groove of variable width at the bottom of the retaining ring.

 The block (Fig. 1) contains a cylindrical body 1 in the form of a glass with a perforated bottom 2, the upper part of which is made in the form of grooves separated by grooves 3, provided with radial protrusions-grippers 4, and a retaining ring 5. The housing is equipped with a flange 6 placed at a distance of length petal from its top. The retaining ring 5 is made in the form of a glass with a through groove of variable width in the bottom and from the side opposite the bottom, is equipped with a flange 7, the diameter of the hole of which is less than the diameter of the cavity of the glass. The petals (figure 2) are made with a section decreasing in height.

 The assembly and operation of the wiring block is as follows.

 The primary (supply) segment of the joint joint 8, at the end of which a detonator capsule 9 is fixed, is passed through a groove in the bottom of the retaining ring 5 (Fig. 3). Secondary (divorced) segments of ШВ 10 are passed through holes in the bottom 2 of the housing 1, their ends are further threaded through the grooves between the petals 3 and bent in the radial direction. Then, the detonator capsule 9 is fully inserted into the opening of the housing 1, and the retaining ring 5 is pushed onto the petals of the housing 3. Due to the fact that the diameter of the opening of the flange 7 of the retaining ring is less than the diameter of its cavity, the petals, having entered the cavity of the ring, are tightly fixed in it by radial protrusions-captures 4. A through groove of variable width (Fig. 3) in the bottom of the retaining ring serves to easily pass through it a segment of ШВ 8 with a detonator capsule 9 (through a wider section) and its subsequent fixation from movements in the axial direction SRI (in the narrowest cross section). Flanges 6 and 7, respectively, on the housing 1 and the retaining ring 5 contribute to the bending of the secondary (split) segments of the ШВ 10 in the radial direction, while simultaneously facilitating the assembly of the wiring block and protecting the junction of the housing with the retaining ring from possible mechanical damage. The execution of the petals 3 with a section decreasing in height (Fig. 2) also simplifies assembly of the block and ensures that the secondary segments of the joint are fixed from displacement both radially (due to pinching in the grooves, of course, also having a variable section), as well as due to their bending and axial direction.

 From any starting device, the shock wave along the primary (inlet) segment of ШВ 8 reaches the detonator capsule 9, which detonates (instantly or with a given deceleration interval) and, in turn, initiates secondary (divorced) segments of ШВ 10 located in the block . Over the segments ШВ 10 the shock wave impulse is transmitted further to the following elements of the surface wiring of the explosive network or through traditional means of detonation to the explosive charge.

 The tests on a ШВ-based initiation system carried out in a fairly wide scope using blasting units of the described design during the installation of explosive networks confirmed the reliable fixation of the ShV primary (lead-in) segment with the detonator capsule and the segments of the secondary (shrinkable) ShV in the block, the convenience and manufacturability of its assembly, increased in comparison with the prototype, the protection of the detonator capsule from mechanical damage, reliable amplification and separation (transmission) of the shock wave pulse through the detonator capsule to the secondary zkam IIIB.

Claims (1)

 The wiring block of low-power detonating cords, containing a case in the form of a glass with a perforated bottom, the upper part of which is made in the form of grooves separated by grooves, provided with radial protrusions-grippers, and a retaining ring, characterized in that the housing is equipped with a flange located at a distance of the length of the petal from it the upper part, the petals are made with a section decreasing in height, and the retaining ring is made in the form of a glass with a through groove of variable width in the bottom and provided with a flange on the side opposite to the bottom, the diameter of the hole is less than the diameter of the cavity of the glass.

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