4results about How to "Reduce speed loss" patented technology

The static pressure vibration suppression structure comprises a fixed part and a movable part corresponding to the fixed part, a pressure equalizing groove is formed in the end face of the fixed part, a static pressure throttling structure is arranged in the pressure equalizing groove and penetrates through the back face of the fixed part, and a vibration suppression flow guide table is arranged on the end face of the movable part. The vibration suppression flow guide table is of a protruding structure with a large base portion and a tip peak-shaped end portion, the tip end of the vibration suppression flow guide table faces the pressure equalizing groove, the tip end and the two sides of the vibration suppression flow guide table are windward sides, and the windward sides can quickly guide airflow to the outlets in the two sides. The flow guide function is strengthened, gas is guided to the two sides in time, direct impact with the end face is avoided, speed loss is reduced, meanwhile, the flow guide structure guides the gas to the two sides in time, vortex caused by long-time staying of high-speed fluid and low-speed fluid in the pressure equalizing cavity is avoided, and the pressure equalizing effect is improved. Good effects of improving the gas pressure fluctuation characteristic in the pressure equalizing tank and inhibiting the cyclone phenomenon are achieved; the static pressure vibration suppression structure is wide in application.

The utility model discloses a clothes care device and a clothes airing machine, and relates to the field of clothes airing supports, the technical scheme is that the clothes care device comprises a bin body, an air duct and an air source, and the bottom of the bin body is provided with a second air inlet; the air duct communicates with the second air inlet. According to the utility model, the air duct at the bottom and the second air inlet can ensure that airflow is uniformly distributed upwards from the bottom, so that the problem of non-uniform airflow coverage caused by clothes stacking is avoided. Therefore, clothes at the bottom can obtain sufficient airflow.

The invention relates to the technical field of tunnel construction, and particularly discloses an oxygen supply system and an oxygen supply method for high-altitude tunnel construction. The device comprises an air curtain generating device, the air curtain generating device comprises a fan and an air curtain jet pipe and further comprises a movable adjusting support arranged below the fan and the air curtain jet pipe, an air inlet is formed in one end of the air curtain jet pipe, the fan is arranged at the air inlet of the air curtain jet pipe, and the fan and the air curtain jet pipe are matched to generate an air curtain. The air curtain divides the tunnel into an upper part and a lower part, an isolation area is arranged above the air curtain, a press-in type air pipe is arranged in the isolation area along the tunnel, an outlet of the press-in type air pipe is located near a tunnel face, a breathing area is arranged below the air curtain, an oxygen supply pipeline is arranged in the breathing area along the bottom of the tunnel, an outlet of the oxygen supply pipeline is located near the tunnel face, and an oxygen generator is arranged at an inlet of the oxygen supply pipeline. An air curtain generated by the air curtain generating device divides the tunnel into an isolation area located above the air curtain and a breathing area located below the air curtain, the oxygen supply effect is improved, the oxygen supply cost is reduced, poisonous and harmful gas, dust and the like can be discharged out of the tunnel through the isolation area along with fresh air flow pressed into the end of the press-in type air pipe, and the ventilation effect is improved. And the original press-in ventilation effect is improved.

The utility model relates to dust collection equipment field discloses a combined multi -point assembly dust collection equipment, including side hang top suction subassembly and side hang side suction subassembly, side hang top suction subassembly and side hang side suction subassembly replaceably and heading machine connect, side hang side suction subassembly includes the standard air pipe and round air inlet pipe connected in proper order, and the round air inlet pipe is used for and standard air pipe connection, side hang side suction subassembly's standard air pipe and round air inlet pipe all and heading machine side surface connect, side hang top suction subassembly includes the standard air pipe, variable cross section transition pipe, former rotation upper transition pipe, upper rotation former transition pipe and rectangle air inlet pipe connected in proper order, and variable cross section transition pipe is used for and standard air pipe connection, and the section level direction of rectangle air inlet pipe is long side, side hang top suction subassembly's standard air pipe, variable cross section transition pipe and former rotation upper transition pipe all and heading machine side surface connect, upper rotation former transition pipe and rectangle air inlet pipe all and heading machine top surface connect, be suitable for small section potassium salt mine lane or coal lane operation.