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Underwater explosive cutter component and underwater explosive cutting method

An underwater blasting and cutter technology, which is applied in the fields of engineering blasting and special blasting, can solve the problems of underwater blasting cutting operation efficiency, reduced effect, and increased construction cost, so as to improve practicability and flexibility, reduce construction costs, Efficient effect

Active Publication Date: 2019-01-15
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, during construction, the traditional energy-gathering kerf has to be redesigned for specific projects. These problems will also lead to reduced efficiency and effectiveness of underwater blasting and cutting operations, and increased construction costs.

Method used

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  • Underwater explosive cutter component and underwater explosive cutting method
  • Underwater explosive cutter component and underwater explosive cutting method
  • Underwater explosive cutter component and underwater explosive cutting method

Examples

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Effect test

Embodiment

[0028] Embodiment: The underwater explosive cutter assembly of the present invention and its application in the underwater explosive cutting of a cylindrical steel pipe.

[0029] This embodiment takes the underwater explosive cutting of a cylindrical steel pipe as an example. Cylindrical steel pipes are mostly used in underwater drilling platforms, steel structure bridges, etc., and they need to be dismantled because the oil life reaches the design life. In this example, the cut steel pipe 12 has an outer diameter of 300 mm and a wall thickness of 10 mm. The steel pipe is located underwater and needs to be cut by underwater explosion. According to the outer diameter of the steel pipe, 10 explosive cutters with a length of 10 cm are selected.

[0030] The explosive cutter is composed of a cutter shell 1, a metal energy-concentrating cover 2, and a high-energy explosive 3. The cutter shell 1 is a cross-section profile shaped like a door, and the top of the metal shell's cross-...

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Abstract

The invention discloses an underwater explosive cutter component which comprises a plurality of explosive cutters and a waterproof inflatable rubber air bag, wherein each explosive cutter is composedof a cutter shell, a metal shaped-charge cover and a high explosive, and the inner part of the cutter shell is separated into an explosive chamber filled with the high explosive and an inflatable chamber by the metal shaped-charge cover. Meanwhile, the invention also discloses an application method of the underwater explosive cutter component. The practicality and flexibility of the explosive cutters are improved, and the explosive cutters can be flexibly assembled for blasted objects. Water in a shaped-charge hole is discharged by the waterproof inflatable rubber air bag, so that the underwater explosive cutter component solves the problem that the shaped cutting effect is bad due to the presence of water in underwater cutting blasting. The underwater explosive cutter component has the good characteristics of being low in cost, high in efficiency, stable, reliable, convenient and flexible, can effectively play the advantages of a shaped charge cutter, improves the working efficiency,and reduces the construction cost.

Description

technical field [0001] The invention relates to an underwater combined explosive cutter and a using method thereof, belonging to the fields of engineering blasting and special blasting. Background technique [0002] The energy-gathering effect is to use the cavity at one end of the charge (also called the energy-gathering hole) to concentrate the energy of the explosive detonation in the direction of the hole to improve the local destructive effect of the explosive. After the shaped charge pack explodes, the detonation products first gather toward the axis of the cavity to form a high-speed, high-pressure, high-density shaped jet with a speed of 1500-3000 m / s, and the flow of such a high-speed jet can reach ten The pressure of tens of thousands or even millions of atmospheres can cause instant damage to the target target plate. For a long time, shaped charges have been used to manufacture various types of projectiles with high lethality. Then the energy-gathering effect ha...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/00F42B3/22
CPCF42B3/22F42D1/00F42D3/00
Inventor 罗宁申涛曹银梅
Owner CHINA UNIV OF MINING & TECH
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