Oil dripping prevention device of injection valve

Abstract

The invention discloses an injection valve oil dripping prevention device, and relates to the field of injection valves, the injection valve oil dripping prevention device comprises an injection valve body, the injection valve body is provided with an oil supply port, an oil injection nozzle and an air inlet channel, and the air inlet channel is connected with an air supply device used for supplying air to the injection valve body and a vacuumizing device used for vacuumizing the air inlet channel; when the injection valve stops injection, the air supply device stops air supply, the vacuumizing device starts to work at the moment, air in the air inlet channel is pumped out instantly, the air in the air inlet channel is changed into negative pressure immediately, the external pressure of the oil nozzle is larger than the internal pressure of the air inlet channel at the moment, and residual lubricating grease in the oil nozzle does not overflow out of the oil nozzle any more. Therefore, waste and environmental pollution caused by overflowing and dripping of lubricating grease of the oil nozzle are avoided, the structure is simple and convenient, use is convenient, the newly-added cost is low, waste of the lubricating grease is greatly reduced, and meanwhile environmental pollution cannot be caused.

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