CN219217872U

CN219217872U - Detonating cord with multi-core structure

Info

Publication number: CN219217872U
Application number: CN202320862430.9U
Authority: CN
Inventors: 陈欢; 高朋飞; 钱明渊; 肖健
Original assignee: Anhui Jiangnan Blasting Engineering Co ltd
Current assignee: Anhui Jiangnan Blasting Engineering Co ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-06-20
Anticipated expiration: 2033-04-18

Abstract

The utility model relates to the technical field of detonating cords and discloses a detonating cord with a multi-core structure, which comprises an inner core tube, wherein core medicines are filled in the inner core tube, cotton wires are arranged in the center of the inner core tube, a metal layer is wound on the surface of the inner core tube, a plurality of groups of vacuum tube cores are arranged outside the metal layer in a circular array, a film coating layer for binding the vacuum tube cores is wound outside each group of vacuum tube cores, and a tube sleeve is sleeved outside the film coating layer. The utility model limits the explosion generated by the core medicine by arranging the metal layer, improves the structural strength, transmits heat to the vacuum tube core, absorbs the gas generated by the explosion by arranging the vacuum tube core, prevents the air pressure in the tube sleeve from being overhigh, protects the detonating cord from being damaged in the detonation process from two aspects of energy absorption and gas absorption by arranging the metal layer and the vacuum tube core, and has strong structural toughness and difficult damage.

Description

Detonating cord with multi-core structure

Technical Field

The utility model relates to the technical field of detonating cords, in particular to a detonating cord with a multi-core structure.

Background

The open-air detonating cord comprises a common detonating cord, a high water-resistant detonating cord, a strong detonating cord, a low-energy detonating cord and the like. The common detonating cord is similar to the detonating cord, but the core explosive adopts high-sensitivity high explosive with high power and high detonation velocity, a large amount of energy and gas are generated in the detonating process, the existing detonating cord is often caused to generate larger explosion due to the fact that the explosive is respectively uneven when in use, the detonating cord is finally damaged, and harmful gas leaks, so that the detonating cord with a multi-core structure is designed for solving the problem.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present utility model is to provide a detonating cord with a multi-core structure, which has strong toughness and is not easy to damage.

The detonating cord with the multi-core structure comprises an inner core tube, wherein core medicines are filled in the inner core tube, cotton threads are arranged in the center of the inner core tube, a metal layer is wound on the surface of the inner core tube, a plurality of groups of vacuum tube cores are arranged outside the metal layer in a circular array, a film coating layer for binding the vacuum tube cores is wound outside each group of vacuum tube cores, and a tube sleeve is sleeved outside the film coating layer.

Preferably, the inner core tube is made of a transparent Pvc material.

Preferably, the metal layer is formed by winding a plurality of metal wires in a circular array arrangement.

Preferably, the vacuum tube core is made of a Pvc material, and a semi-permeable groove is formed on the surface of the vacuum tube core.

The beneficial effects of the utility model are as follows: through being provided with the explosion that the metal level restriction core medicine produced, improve structural strength, and transfer heat gives the vacuum tube core, absorb the gas that the explosion produced through setting up the vacuum tube core, prevent that the interior atmospheric pressure of pipe box is too high, under the inside high-pressure condition of pipe box, the pipe box is more easily receive external force damage, lead to the gas leakage, the breathing in of vacuum tube core needs to utilize the metal level to transfer heat to melt through the semi-permeable layer realization, protect detonating cord can not be in detonating process damage from energy absorption and gas absorption two aspects through setting up metal level and vacuum tube core, this detonating cord structure toughness is strong, it is not fragile.

Drawings

Fig. 1 is a schematic cross-sectional view of a detonating cord with a multi-core structure according to the present utility model.

Fig. 2 is a partial enlarged view of a portion a in fig. 1 of the detonating cord with a multi-core structure according to the present utility model.

Fig. 3 is an exploded view of the detonating cord with multi-core structure according to the present utility model.

Fig. 4 is a schematic diagram of a vacuum tube core structure of a detonating cord with a multi-core structure according to the present utility model.

In the figure: 1-inner core tube, 2-core medicine, 3-cotton thread, 4-metal layer, 5-vacuum tube core, 51-semi-permeable groove, 6-coating layer and 7-tube sleeve.

Detailed Description

Referring to fig. 1 to 4, the detonating cord with a multi-core structure comprises an inner core tube 1, core medicine 2 is filled in the inner core tube 1, cotton threads 3 are arranged in the center of the inner core tube 1, structural toughness is improved by arranging the cotton threads 3, a metal layer 4 is wound on the surface of the inner core tube 1, a plurality of groups of vacuum tube cores 5 are arranged outside the metal layer 4 in a circular array, a film coating layer 6 for binding the vacuum tube cores 5 is wound on the outer part of each group of vacuum tube cores 5, a tube sleeve 7 is sleeved outside the film coating layer 6, the inner core tube 1 is made of transparent Pvc material, the condition of the core medicine 2 in the inner core tube 1 can be clearly seen, problems can be found in time mainly when the inner core tube 1 is assembled and coated, defective rate is reduced, the toughness in the detonating cord is improved by arranging a plurality of metal wires in a circular array, and the detonating cord is not easy to damage, the metal layer 4 can absorb energy with extremely high efficiency when in explosion, reduce the explosion energy, prevent the pipe sleeve 7 from being damaged to release gas, the metal layer 4 has strong heat conduction capability, the capability generated by the explosion can be transmitted to the vacuum pipe core 5 through contact, so that the semi-permeable groove 51 is melted through, the vacuum pipe core 5 is made of a PVC material, the semi-permeable groove 51 is arranged on the surface of the vacuum pipe core 5, a cutting knife is used for cutting a part of the surface of the vacuum pipe core 5, the cutting position is the semi-permeable groove 51, the partial thickness of the semi-permeable groove 51 is thinner, the semi-permeable groove 51 is more easily melted to form a passage, the gas generated in the explosion guiding process is sucked into the vacuum pipe core 5, the semi-permeable grooves 51 on one group of the vacuum pipe cores 5 are arranged at different positions as shown in figure 4 (the actual spacing distance is far longer than that shown in the figure), the core medicine 2 is rapidly burnt in the explosion guiding process of the detonating cable, the gas and the release energy are generated, the released energy is melted through the semi-permeable groove 51, so that the vacuum tube is communicated with the tube sleeve 7 to absorb the gas generated by explosion, and the semi-permeable groove 51 is arranged in a staggered manner, so that the gas can be continuously accommodated, the speed of the gas generated by burning the core medicine 2 is adapted, and a certain balance is achieved.

When the device is used, the fuse at one end of the detonating cord is ignited, the explosive core is detonated, the explosive core is rapidly transferred to the explosive along the detonating cord, a large amount of gas and energy are generated by the detonation of the explosive core in the process, the energy is absorbed by the metal layer 4, the protection structure is complete, the energy is transferred to the vacuum tube core 5 contacted with the metal layer 4, the melting through is realized at the position where the semi-permeable groove 51 is formed, the gas generated by explosion is sucked into the vacuum tube core 5, the gas pressure in the tube sleeve 7 is reduced, and the gas leakage caused by the explosion-supporting tube sleeve 7 is prevented.

Claims

1. Detonating cord with multicore structure, its characterized in that: the inner core tube comprises an inner core tube, core medicines are filled in the inner core tube, cotton threads are arranged at the center of the inner core tube, a metal layer is wound on the surface of the inner core tube, a plurality of groups of vacuum tube cores are arranged outside the metal layer in a circular array, a film coating layer used for binding the vacuum tube cores is wound on the outer part of each group of vacuum tube cores, and a tube sleeve is sleeved outside the film coating layer.

2. The detonating cord having a multi-core structure according to claim 1, wherein: the inner core tube is made of a transparent Pvc material.

3. The detonating cord having a multi-core structure according to claim 1, wherein: the metal layer is formed by winding a plurality of metal wires in a circular array arrangement.

4. The detonating cord having a multi-core structure according to claim 1, wherein: the vacuum tube core is made of a PVC material, and a semi-permeable groove is formed in the surface of the vacuum tube core.