Device for blasting power transmission tower by utilizing prefabricated granular medium

Abstract

The invention discloses a device for blasting a power transmission tower by utilizing a prefabricated granular medium. The device comprises first angle steel, wherein two sides of the first angle steel are connected with to-be-blasted angle steel through second angle steel; the first angle steel and the to-be-blasted angle steel are combined to form a cylindrical structure; two ends of the cylindrical structure are sealed through third angle steel; a connecting pipe is arranged at the axis of the cylindrical structure; explosive packages which are distributed in a spacing manner are arranged in the connecting pipe and led out of the cylindrical structure through a nonel detonator; and the space between the connecting pipe and the cylindrical structure is filled with the prefabricated granular medium. The whole device for blasting the power transmission tower by utilizing the prefabricated granular medium can be fixed to form the cylindrical structure just by utilizing the angle steel and bolts; the prefabricated granular medium and the explosive packages are placed in a closed space; and by utilization of the incompressibility of the prefabricated granular medium, the blasting damage degree can be greatly improved and the blasting effect can be guaranteed.

Description

technical field [0001] The invention relates to a device for blasting a power transmission tower using a prefabricated granular medium, belonging to the field of blasting. Background technique [0002] According to the plan, my country will build dozens of UHV DC projects in the next 10-20 years, and gradually form a UHV AC-DC hybrid power grid, which will supply power to the central and eastern load centers through UHV DC and AC systems. In order to alleviate the problems faced by the multi-infeed DC system, such as insufficient reactive power support capacity of the receiving end grid, and the dense sending system causing the short-circuit current to cross the line, UHV layered DC has become a new DC access mode. Compared with conventional UHV DC, the main difference is that the high-end converter transformer and low-end converter transformer on the inverter side are respectively connected to 500kV and 1000kV power grids, and the AC filter and reactive power compensation d...

AI Technical Summary

Problems solved by technology

[0003] However, when constructing UHV transmission towers, most of the old iron towers are on the same path as the newly built new iron towers, and the original line ground wires and iron towers must be removed before construction can begin.

The dismantling of angle steel laps in our country is still in its infancy and needs to be dismantled by workers, which is labor-intensive, low-efficiency, and highly dangerous.

In the angle steel truss, it is impossible to blast through the hole, only exposed blasting, a large part of the energy is dissipated into the air, and the blasting effect is poor

Since the transmission tower is located in a mountainous area, there is not enough electricity, and welding cannot be carried out on site. Moreover, the transportation in the mountainous area is inconvenient, and it is impossible to transport materials in large quantities.

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