Oil gas escape prevention device for oiling metering of oiling machine

The utility model discloses an oil gas escape prevention device for oiling metering of an oiling machine, and relates to the technical field of escape prevention devices. The oil gas escape preventing device for oiling metering of the oiling machine comprises a metering tank, the upper surface of the metering tank is fixedly connected with a lengthened barrel, the outer wall of the end, located in the metering tank, of the lengthened barrel is fixedly sleeved with a sealing sleeve, the upper surface of the sealing sleeve is fixedly connected to the top of the interior of the metering tank, and the inner wall of the lengthened barrel is in threaded connection with an upper cover; through holes are formed in the front surface and the rear surface of the lengthened barrel, the two through holes communicate with the interior of the lengthened barrel, the two through holes are formed in a front-back corresponding mode, and two fixing rods drive four guide columns through the two fixing rods to drive four second sp