4results about How to "Guaranteed one-way flow" patented technology

This utility model relates to the field of air sampling technology, and more particularly to a directional sampling and filtering device for atmospheric environmental detection. Its technical solution includes: a filter assembly, an intermediate chamber, and a gas storage assembly. The filter assembly is located at the bottom of the intermediate chamber, and the filter assembly consists of filter elements, a housing, and a rotating plate. The upper inner wall of the housing is threaded onto the lower outer wall of the intermediate chamber. The rotating plate is rotatably disposed within the housing, and each filter element is threaded at equal intervals onto the rotating plate. The gas storage assembly is located at the top of the intermediate chamber. The filter assembly consists of a cylindrical body, a piston slidably disposed within it, and two one-way valves. This utility model achieves the beneficial effects of high-efficiency purification, rapid replacement, and stable sampling through a multi-filter element rotation and replacement structure and a one-way filtration design.

The utility model discloses an anti-gas-blocking structure of a petroleum pipeline, which relates to the field of petroleum pipelines and comprises a pipeline main body provided with an exhaust hole used for being connected with an exhaust device. The sealing connecting piece is arranged on the outer side of the exhaust hole of the pipeline main body and is connected with the exhaust hole at the same time; the exhaust mechanism is mounted on the sealing connecting piece; and the pressure reducing mechanism is mounted on the sealing connecting piece, and the pressure reducing mechanism is connected with the exhaust mechanism. According to the sealing connecting piece, the arc-shaped plate is attached to the curved surface of the pipeline body to form mechanical limiting, a triple sealing structure of the inner side sealing gasket and the sealing sleeve is matched, oil and gas leakage is effectively prevented, when gas is accumulated in the pipeline, the gas enters the exhaust pipe through the exhaust hole and is collected to the one-way exhaust valve through the three-way connector, and the gas leakage is avoided. The valve plate is automatically opened to exhaust gas by utilizing gas pressure, so that the problem of mechanical lag of gear transmission in the prior art is avoided.

This utility model relates to the field of oxygen flow regulation technology, and more particularly to a portable oxygen cylinder flow regulation device. It includes an oxygen cylinder body, a fixing block fixedly connected to the outer wall of the oxygen cylinder body, a motor fixedly connected to the outer wall of the fixing block, a drive shaft fixedly mounted at the output end of the motor, a disc fixedly connected to the outer wall of the drive shaft, a fixing shaft fixedly connected to the outer wall of the disc, a rotating plate mounted on the outer wall of the fixing shaft, a sliding rod fixedly connected to one end of the rotating plate, a sealing column fixedly connected to the other end of the sliding rod, a fixing cylinder slidably connected to the outer wall of the sealing column, and a first one-way valve disposed inside the fixing cylinder. This utility model provides a portable oxygen cylinder flow regulation device. Starting the motor drives the drive shaft to rotate, and adjusting the position of the sealing column adjusts the size of the oxygen channel, achieving precise control of the oxygen flow, ensuring unidirectional oxygen flow, preventing gas backflow, and featuring a compact design, small size, and easy portability.

This utility model relates to the field of electric motor technology and discloses a brushless DC motor with a fan-blade structure, including a rotor and a stator. A rotating shaft is fixedly connected to the shaft center of the housing. A magnet is connected to the inner side wall of the housing. Multiple cooling impellers are arranged in a circular array on one end side wall of the housing. A baffle is fixedly installed at one end of each cooling impeller. Multiple integrated positioning and heat dissipation holes are opened on one end side of the housing. One end of the rotating shaft is rotatably connected to a bracket via a bearing. Multiple heat dissipation holes are opened on the outer side of the bracket. A heat dissipation cavity is formed between the bracket and the housing. This utility model saves the height occupied by the motor by combining the housing and the cooling impellers, which is conducive to the miniaturization and thinning design of the product. The heat dissipation holes and the integrated positioning and heat dissipation holes form a convection heat dissipation channel. Cool air is drawn in from the cooling impeller end, flows through the heat-generating components inside the motor, and is discharged from the heat dissipation holes, thereby significantly improving the heat dissipation efficiency and ensuring the stable operation of the brushless DC motor.