Air saving device and air supply method for crust breaking cylinder

Abstract

The invention relates to a novel air saving technique and aims to provide an air saving device and an air supply method for a crust breaking cylinder. An air supply pipe of the device comprises an air inlet pipe and an air outlet pipe; the device also comprises a two-position three-way electromagnetic valve, an external pilot pipe, a pressure regulating valve and a time relay, wherein the two-position three-way electromagnetic valve is provided with a hole P, a hole A and a hole R; the air outlet pipe is connected with the hole A, while the air inlet pipe is connected to the hole P; the pressure regulating valve is connected to the hole R and the air inlet pipe through pipelines, respectively; the external pilot pipe is connected to the two-position three-way electromagnetic valve and the air inlet pipe, respectively. The air saving device for the crust breaking cylinder, provided by the invention, is capable of improving the air utilization efficiency of the crust breaking cylinder without changing the crust breaking process requirements of the original crush breaking cylinder, and also saving compressed air and achieving the purposes of saving energy and reducing consumption; the air saving device can be connected in parallel to an air supply branch pipe of each electrolytic aluminium cell crust breaking cylinder simply and conveniently.

Description

technical field [0001] The invention relates to a novel air-saving device, in particular to an air-saving device and an air supply method for a shelling cylinder. Background technique [0002] The air consumption of shelling cylinders in the electrolytic aluminum industry accounts for about 20% of the compressed air consumption of the entire factory, which has a crucial impact on the energy consumption of the entire factory. Pneumatic systems play an important role in industrial automation due to their advantages of low cost, no pollution, easy maintenance, easy adjustment of output force and working speed, etc., but the energy consumption of shelling cylinders accounts for a large proportion of the total energy consumption of pneumatic systems The utilization rate is not high. Today, when the energy problem is becoming more and more prominent, the energy saving of the shelling cylinder is of great significance to the energy saving and consumption reduction of the electroly...

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Problems solved by technology

[0003] At present, the throttle valve of the shelling cylinder existing in China changes the pressure of the shelling cylinder into a two-stage output. When the cylinder is stretched out for shelling, it outputs high-pressure gas, and when it is retracted, it outputs low-pressure gas. Although it can greatly reduce the use of compressed air amount, to achieve the purpose of energy saving, but because the pressure of the input compressed air becomes lower when the shelling cylinder is retracted, the retraction force of the shelling cylinder becomes smaller and the speed becomes slower, and more electrolytic aluminum liquid is easily bonded to the hammer head. The frequency increases and the number of jamming increases, which affects the shelling process of the shelling cylinder

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