Safety drilling machine for testing

Abstract

The invention relates to a safety drilling machine for testing. The machine comprises a structural component and a control circuit and is characterized in that the structural component is composed of a bottom plate, a main bracket, an auxiliary bracket, a U-shaped frame, a drilling machine component and a temperature reducing device; the control circuit comprises a power circuit, a single chip, a motor drive circuit and an electromagnetic valve drive circuit; a circuit board is mounted in a control box; and the motor drive circuit and the electromagnetic valve drive circuit control the motor and the temperature reducing device respectively. In the safety drilling machine for testing, the bottom plate is used as a base plate; the drilling machine main body, the main bracket, the auxiliary bracket and the U-shaped frame are matched and assembled together; through the guide of the round holes in the main bracket, the auxiliary bracket and the U-shaped frame, the drilling machine main body keeps the vertical motion precision; through the matching among a limiting platform, a limiting clamp and a spring, the movement limit and reset of the drilling machine main body are realized; since the motor drive circuit and the electromagnetic valve drive circuit control the motor and the temperature reducing device, liquid nitrogen is accurately sprayed for cooling according to the program; and moreover, the rotation speed, temperature and drill angle are controllable, little manual work is required, the efficiency is high, and the shortcomings of the prior art are overcome.

Description

technical field [0001] The invention relates to laboratory equipment, in particular to a safety drilling machine for testing. Background technique [0002] At present, as a national laboratory, the Industrial Product Center has a wide variety of test samples, involving batteries, textile raw materials, lighters, chemical raw materials, dangerous chemicals, food packaging, dangerous goods packaging, etc.; the test fields are extensive, involving electromechanical, chemical, textile, light Among them, the main component of the lighter fuel is n-butane with a slight special smell. After high-pressure compression and liquefaction, when the pressure drops, it will automatically return to gas, with a relative density of 0.5788, a boiling point of -0.5°C, a freezing point of -138°C, and a flash Point -60°C (closed cup), autoignition point 405°C; relative density of isobutane is 05572, boiling point -11.7°C, freezing point -160°C, flash point -82.78°C, autoignition point 462.22°...

AI Technical Summary

Problems solved by technology

[0003] When inspecting lighter fuel, it is necessary to drill holes on the container for sampling. The high temperature and sparks generated by the drill can cause the combustion or explosion of the lighter fuel. However, the existing micro drills are usually hand-held and do not have any drill bits. The cooling device usually adopts the cooling method of reducing the rotating speed or artificially distributing water to cool down the drill when drilling. And the angle of the drill bit, it is easy to generate sparks. 2. It takes a lot of labor and low efficiency

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