Automatic reversing mechanism

Abstract

The invention discloses an automatic reversing mechanism, and belongs to the technical field of oil cylinder control devices. The automatic reversing mechanism solves the technical problem and achieves automatic reversing through the motion of piston rods of oil cylinders. According to the technical scheme for solving the technical problem, the automatic reversing mechanism comprises the first oil cylinder, the second oil cylinder, the third oil cylinder, the first piston rod, the second piston rod, the third piston rod and a manual reversing valve, a cylinder body of the first oil cylinder, a cylinder body of the second oil cylinder and a cylinder body of the third oil cylinder are all fixedly arranged, the second oil cylinder is arranged between the first oil cylinder and the third oil cylinder, the bottom end of the manual reversing valve is fixed, the manual reversing valve is a two-position four-way valve, and the manual reversing valve controls the motion direction of a second piston. The automatic control over the automatic reversing mechanism is achieved through the motion of the piston rods of the oil cylinders, and the explosion-proof security of equipment used under a mine is increased.

Description

technical field [0001] The automatic reversing mechanism of the invention belongs to the technical field of oil cylinder control devices. Background technique [0002] It is often necessary to install hydraulic supports underground. The traditional underground installation of hydraulic supports generally adopts handicraft operations, which is labor-intensive, low-efficiency, and has many potential safety hazards. With the rapid development of the coal mining industry, there is an urgent need for a high-efficiency, adaptable There are also some positioning machines on the market, but these positioning machines have a high center of gravity, a cantilever, and a low safety index, which does not meet the needs of the rapid development of modern coal mines. Moreover, the explosion-proof requirements for the equipment in the mine are very high. In order to operate the positioning machine safely in the mine, it is necessary to avoid using electricity as much as possible to prevent ...

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Problems solved by technology

[0002] It is often necessary to install hydraulic supports underground. The traditional underground installation of hydraulic supports generally adopts handicraft operations, which is labor-intensive, low-efficiency, and has many potential safety hazards. With the rapid development of the coal mining industry, there is an urgent need for a high-efficiency, adaptable At present, there are some positioning machines on the market, but these positioning machines have a high center of gravity, a cantilever, and a low safety index, which does not meet the needs of the rapid development of modern coal mines.

Moreover, the explosion-proof requirements for the equipment in the mine are very high. In order to operate the positioning machine safely in the mine, it is necessary to avoid using electricity as much as possible to prevent danger. The control system of the oil cylinder is mainly electromagnetic control, and the explosion-proof performance of the electromagnetic control is poor. , affecting safe production in mines

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