1. Our company provides a hydraulic oil tank breathing apparatus. By setting a lower breathing apparatus at the inlet end of the upper breathing apparatus, and setting an oil filter net and spiral separation part in the lower breathing apparatus, the oil particles in the discharged air can be effectively adsorbed on the oil filter net and spiral separation part, and the concentration of oil particles reaching the upper breathing apparatus can be reduced. Thus, it is conducive to the filter material arranged in the upper expiratory device to completely absorb oil particles, so as to avoid oil particles from the outlet hole of the respirator to pollute the environment and affect the appearance of the hydraulic tank. 2. The hydraulic oil tank breathing apparatus comprises an upper breathing apparatus and a lower breathing apparatus arranged on the upper breathing apparatus. The upper breathing apparatus comprises an upper breathing apparatus, an upper cover arranged on the upper breathing apparatus and a filter material arranged between the upper breathing apparatus and the upper breathing apparatus. The upper breathing apparatus is arranged around the top of the upper breathing apparatus and an upper breathing apparatus arranged in the middle. The lower exhalation device comprises a lower breathing seat for connecting the oil tank, a housing arranged on the lower breathing seat and a lower cover arranged on the housing, a lower air inlet is provided on the lower breathing seat, a threaded hole is provided on the lower cover for connecting the upper breathing seat, and a spiral separation part arranged between the housing and the lower cover. The spiral separation part comprises a separation cylinder, a spiral blade, a blade shaft and a baffle plate. The outer edge of the spiral blade is fixed on the inner wall of the separation cylinder and the inner edge is fixed on the blade shaft. The lower end of the blade shaft is flat with the lower end of the separation cylinder, and the upper end extends out of the separation cylinder and is connected with the baffle plate. 3. Oil tank breathing apparatus and oil tank, including: a whole cylindrical breathing apparatus housing; The top is provided with a respirator upper cover: the respirator upper cover is provided with an exhaust port; The bottom of the respirator housing is provided with an air inlet; The cone of the oil collecting funnel is provided with a plurality of through holes arranged in sequence along the circumference direction; The top of the cone part is also provided with an air path check valve which is sealed by opening the top of the one-way oil collecting funnel, and an oil-gas coalescating part is also provided between the air path check valve and the one-way diaphragm of the funnel; An air filter device is also provided in the respirator shell; A one-way structure is arranged between the air filter device and the funnel.
4. At present, a new oil tank breathing apparatus and oil tank can separate the expiratory channel and inspiratory channel of the breathing apparatus to avoid the pollution of the air filter material by the regurgitating oil and gas, and avoid the air pollution caused by the regurgitating oil and gas spilling into the external environment. At the same time, both oil and gas filtration and air filtration can be effectively achieved. 5. The oil tank respirator produced by our company avoids the pollution of the air filter material by the regurgitated oil and gas, and avoids the air pollution caused by the regurgitated oil and gas spilling into the external environment. The device can not only filter oil and gas, but also filter air effectively.