Trunkline delay detonator and blast-triggering device using same

Patent metadata

Field	Value
Publication number	US-11054235-B2
Application number	US-201716627026-A
Country	US
Kind code	B2
Filing date	Jun 28, 2017
Priority date	Jun 28, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

The present disclosure relates to a trunkline delay detonator and a blast-triggering device using the same. In the blast-triggering device, a trunkline delay detonator is inserted into a connector in such a manner that a plurality of shock tubes connected to a detonator for initiating an explosive are interposed between the connector and the trunkline delay detonator, so that an explosion signal is applied to the shock tubes by detonation of the trunkline delay detonator. In the blasting detonator, close contact between the outer surface of the trunkline delay detonator and the shock tubes is improved, whereby energy lost in an explosion is reduced and an explosion signal is stably and uniformly applied to the shock tubes by using powder which has a weak explosive power and is relatively insensitive compared to conventional powders.

First claim

The invention claimed is:

1. A blast-triggering device comprising:
a connector; and
a trunkline delay detonator,
wherein the trunkline delay detonator is inserted into the connector, a plurality of shock tubes that are connected to a detonator for igniting an explosive is fitted between the connector and the trunkline delay detonator, and an explosion signal is applied to the shock tubes by detonation of the trunkline delay detonator,
the connector comprises:
a connector body having a rectangular rod shape including front and rear surfaces and opposite side surfaces, and having therein a detonator insertion portion, which passes through the connector body in a longitudinal direction of the connector body, so that the trunkline delay detonator is inserted into the detonator insertion portion;
a connector head configured such that a rear end thereof is integrally connected with a rear surface of the connector body, an upper surface thereof is formed in a curved surface extending from the rear end thereof to a front end thereof, a tube insertion portion of a void is provided between a lower surface thereof and the connector body so that the plurality of shock tubes connected to the detonator for igniting an explosive is fitted therein, and the front end thereof is separated from the connector body;
a clip-fixing body, which is integrally provided with a lower end of the connector body, is formed by protruding from a circumference of the lower end of the connector body, has an opening of the detonator insertion portion in a lower surface thereof, and has a clip-fitting portion formed by passing through opposite side surfaces of the clip-fixing body; and
a fixing clip fitted in the clip-fitting portion to fix the trunkline delay detonator that is inserted into the detonator insertion portion, and
the trunkline delay detonator comprises:
a detonator casing member having an insertion space therein in a longitudinal direction thereof, the insertion space having an open lower end;
a base charge member inserted into an upper end side of the insertion space of the detonator casing member;
a delay line member inserted into the insertion space in the detonator casing member and positioned under the base charge member, and in which an ignition retardant is provided;
a plug line member inserted into the insertion space in the detonator casing member and positioned under the delay line member; and
a detonation tube inserted into an inside of the plug line member so that one end of the detonation tube is positioned up to an upper end of the plug line member, and in which an explosive is inserted,
wherein the connector body comprises:
a main body member having a rectangular rod shape; and
a head-supporting member provided at an upper end of the main body member, formed by extending outwards from a circumference of the main body member, and formed such that a rear surface thereof is integrally connected with the connector head and a front surface thereof is separated from a front end of the connector head,
wherein the head-supporting member has a guide protrusion at the front surface thereof, and the guide protrusion is configured to be in contact with the front end of the connector head and is formed such that a gap between the guide protrusion and the connector head widens from a contact portion with the connector head toward the front end of the connector head,
wherein the main body member is provided with a first horizontal groove and a second horizontal groove spaced apart from each other in a front surface thereof, the first horizontal groove and the second horizontal groove being open toward opposite sides of the main body member, respectively, a plurality of first horizontal grooves being spaced apart from each other in a longitudinal direction of the main body member, and a plurality of second horizontal grooves being spaced apart from each other in the longitudinal direction of the main body member, and the main body member is provided with a third horizontal groove and a fourth horizontal groove spaced apart from each other in a rear surface thereof, the third horizontal groove and the fourth horizontal groove being open toward the opposite sides of the main body member, respectively, a plurality of third horizontal grooves being spaced apart from each other in the longitudinal direction of the main body member, and a plurality of fourth horizontal grooves being spaced apart from each other in the longitudinal direction of the main body member.

2. The blast-triggering device of claim 1 , wherein an upper end of the detonator casing member is formed in a hemispherical shape around a central upper flat surface of the detonator casing member.

3. The blast-triggering device of claim 2 , wherein an external diameter of the detonator casing member is 7.1˜8.5 mm and an internal diameter thereof is 5.5˜7.0 mm.

4. The blast-triggering device of claim 2 , wherein the lower surface of the connector head is formed to have a flat surface corresponding to the central upper flat surface of the detonator casing member and a round surface corresponding to the hemispherical shape thereof.

5. The blast-triggering device of claim 2 , wherein an upper surface of the connector body is provided with side protrusions for supporting tubes, the side protrusions for supporting tubes protruding into the tube insertion portion to be spaced apart from each other, receiving an upper end of the trunkline delay detonator therebetween, and each having a semicircular shape when viewed from a lateral direction of the connector body.

6. The blast-triggering device of claim 1 , wherein the base charge member includes one explosive selected from among tricinate, diazodinitrophenol (DDNP), tetracene, and mercury fulminate.

7. The blast-triggering device of claim 1 , wherein the base charge member uses one explosive selected from among explosives each having one value of falling hammer sensitivity and friction sensitivity equal to or less than a corresponding value of lead azide (LA) and a remaining value thereof less than a corresponding value of LA, thereby being less sensitive and less powerful than LA.

8. The blast-triggering device of claim 1 , wherein the trunkline delay detonator further comprises:
a powder removal plate member, which is positioned at an upper end of the delay line member, has a center hole therein, and is configured such that an outer circumference thereof is in contact with an inner circumferential surface of the detonator casing member to remove base charge powder remaining on the inner circumferential surface thereof.

9. The blast-triggering device of claim 1 , wherein the connector body, the connector head, and the clip-fixing body are integrally formed in a single body, and are each made by using one material or mixing at least two materials selected from among high-density polyethylene, intermediate-density polyethylene, polypropylene, metallocene linear low-density polyethylene, and polyamide.

10. The blast-triggering device of claim 1 , wherein the fixing clip is provided with a tube-fitting groove in which the detonation tube connected to the trunkline delay detonator is fitted, so that a lower end of the trunkline delay detonator is supported when the detonation tube is inserted into and fitted in the tube-fitting groove.

11. The blast-triggering device of claim 1 , wherein a total length including the connector body, the connector head, and the clip-fixing body is 65˜110 mm, and a thickness between opposite side surfaces of the connector body is 15˜50 mm, a diameter of the detonator insertion portion is 7.1˜9.5 mm, a thickness between the upper surface and the lower surface of the connector head is 3

Assignees

• Hanwha Corp

Inventors

• Lee Eung So
• Park Ki Chul
• Kim Se Hun
• Kim In

Classifications

• C06C7/00

  Non-electric detonators; Blasting caps; Primers · CPC title

• C06C5/06

  Fuse igniting means; Fuse connectors · CPC title

• F42D1/043 Primary

  Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26) · CPC title

• C06B37/00

  Compositions containing a metal fulminate · CPC title

• C06B25/04

  the nitrated compound being an aromatic · CPC title