10results about How to "Guaranteed one-way flow" patented technology

The ecological slope protection structure for water and soil conservation for water conservancy construction comprises soil retaining plates fixedly supported on slopes on the two sides of a river, planting grooves for planting green plants are formed in the soil retaining plates, a water pumping pipe is fixedly connected, and the outer contour of the water pumping pipe is sleeved with a rectangular shell moving in a reciprocating mode; the rectangular shell is fixedly connected with a spray head and a drainage pipe which is in through connection with the spray head, in addition, a salvage mechanism and a liquid pumping mechanism are further arranged on the soil retaining plate and used for cleaning floating objects on the surface of river water and pumping the river water for irrigation, and the salvage mechanism achieves salvage of the floating objects through matched action of a cylindrical roller and a filter plate; according to the ecological slope protection structure, by means of an automatic irrigation system, the utilization efficiency of water resources is improved, the soil retention capacity is enhanced, plant growth is promoted, water and soil loss is effectively prevented, and the ecological slope protection structure can be applied to the field of ecological slope protection especially under the drought condition. The ecological environment is protected and recovered.

The present invention discloses an aortic external counterpulsation device with an extracorporeal breathing chamber, comprising an intracorporeal catheter and a breathing chamber assembly, wherein the breathing chamber assembly is also connected to a counterpulsation controller via a wire. A plurality of through holes are provided on the inner end side wall of the intracorporeal catheter, and the outer end of the intracorporeal catheter is closedly connected to an extracorporeal balloon; the breathing chamber assembly comprises a shell, a piston driving mechanism and an elastic breathing chamber membrane arranged inside the shell, wherein the closed end of the elastic breathing chamber membrane is connected to the piston, and the open end of the elastic breathing chamber membrane is sealedly connected to the outer side of the root of the extracorporeal balloon after wrapping the extracorporeal balloon. The piston driving mechanism drives the elastic breathing chamber membrane to expand or compress, thereby causing the extracorporeal balloon to expand or be compressed, thereby realizing blood flow. The present invention realizes extracorporeal counterpulsation of blood in the descending aorta by placing the balloon externally and relying on the extracorporeal breathing chamber assembly to expand and compress the extracorporeal balloon. This structure can greatly increase the volume of the extracorporeal balloon, ultimately increasing cardiac output and meeting the patient's systemic blood supply needs.

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 application relates to the technical field of drilling devices, and discloses a drilling device for metal computer support machining and an operation method thereof, which comprises a driven feeding mechanism and a buffer liquid flow control mechanism. The drilling device for metal computer support machining and the operation method thereof utilize the liquid output by a hydraulic system to control the feeding of a drill bit, realize systematic feeding pressure control on the basis of guaranteeing the driven feeding, can guarantee the drilling efficiency of the drill bit on the metal computer support and the effective utilization rate of kinetic energy on one hand, and can effectively prevent the drill bit and the metal computer support from being deformed due to the overloading of the feeding pressure on the other hand, so that the limitation of the equipment in the use process is reduced, and the self-adaptability of the equipment is improved.

The invention relates to the technical field of oil-gas-water three-phase mixed transportation fluid condensation point experimental testing, in particular to a device for testing the lowest flowable temperature of a mixed transportation pipeline and a using method. The device comprises a water bath box, a coil pipe, a first pressure sensor, a second pressure sensor, an ultrasonic measuring module, a temperature adjusting device and a control unit; and a plurality of coils are coiled in the water bath box. The device is reasonable and compact in structure, during use, mixed liquid of water and methanol is injected into the water bath box, the coil pipe is immersed in the mixed liquid of water and methanol, and the temperature adjusting device is arranged, so that cooling capacity can be provided for the mixed liquid in the water bath box, the temperature of the mixed liquid is reduced, and the service life of the water bath box is prolonged. The ultrasonic transmission time of fluid in the coil pipe can be measured by arranging the ultrasonic transmitting probe, the ultrasonic receiving probe and the ultrasonic measuring module, one-way flowing of all fluid is guaranteed by arranging the one-way valve, and the minimum flowable temperature of mixed transportation fluid on site under multiple influence factors can be accurately measured.

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.

The invention discloses an air-cooled methanol fuel supply system with a closed structure, and relates to the technical field of marine methanol fuel supply. The device consists of a closed structure, an air-cooled heat exchange surface, an atomizing nozzle, a cooling medium control valve, a temperature sensor, a fan, a methanol gas detector, a liquid level switch and a methanol pump. According to the system, the whole fuel supply system is enclosed and shielded through a closed structure, and temperature-controllable air is introduced by a fan to pass through an air-cooled heat exchange surface so as to effectively cool methanol after being pumped by a methanol pump. The temperature sensor monitors the temperature of the air inlet, the cooling medium control valve adjusts the flow of the atomizing nozzle, and accurate temperature control is achieved. And the air-cooling heat exchange surface adopts an innovative airflow design, so that the air flow is increased, and the heat exchange efficiency is enhanced. The methanol gas detector and the liquid level switch can rapidly detect leakage, methanol gas is discharged to a safe position through mechanical ventilation, liquid methanol is collected, and pollution to a cooling medium system is prevented.

The utility model discloses a kind of double-layer anti-reflux sealing structures of regenerative ink cartridge, belong to printer consumables technical field, including storage box, ink adding port and ink outlet, further include anti-reflux mechanism and protection mechanism, anti-reflux mechanism includes check box, its inside rotationally connected with shaft, fixed with baffle and limiting plate on the shaft, the blocking block for abutting limiting plate is provided in check box inner wall, multiple check boxes are integrated by fixed frame, fixed frame is slidably connected using fixed plate and the fixed plate groove on storage box, protection mechanism is composed of honeycomb board of covering storage box and the buffer rubber pad of setting in box body four corners, and sealing cap, sealing column and sealing ring combination is used to seal ink outlet.The utility model solves the problem of ink backflow, poor protection and unreliable sealing, has the advantages of reliable anti-reflux, convenient installation and maintenance, strong anti-collision ability and good sealing.

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.