8results about How to "Avoid backflow phenomenon" patented technology

The embodiment of the invention relates to the field of photo-thermal utilization, and discloses a heat pump system based on photovoltaic photo-thermal, a control method, equipment and a storage medium. The heat pump system comprises a photo-thermal evaporation assembly, a compressor and a condenser. The photo-thermal evaporation assembly comprises a main pipeline formed by a photovoltaic photo-thermal assembly and an evaporator which are sequentially connected in series, and a bypass pipeline communicated with the main pipeline. The controller is in control connection with the main pipeline and the bypass pipeline and used for controlling refrigerants to flow through the photovoltaic photo-thermal assembly and / or the evaporator in a switchable mode by adjusting the conduction state of the main pipeline and the conduction state of the bypass pipeline. According to the heat pump system and the control method provided by the invention, the technical problem of large heating value fluctuation caused by environmental influence is solved, and at least the purposes of flexibly utilizing the photovoltaic photo-thermal assembly to exchange heat with the evaporator and adapting to different environments can be achieved, so that heat energy is efficiently and stably provided for customers, and condensed water is prevented from being generated on the surface of the photovoltaic photo-thermal assembly.

The automatic fire extinguishing equipment comprises a protective shell, a lithium battery body is connected to the interior of the protective shell, a heat dissipation sealing mechanism is arranged on the outer side of the protective shell, and a partition fire extinguishing mechanism is arranged on the inner side of the protective shell; the heat dissipation sealing mechanism is arranged on the outer side of the protective shell, and the connecting piece, the multiple sealing blades, the first supporting arm, the second supporting arm, the extending plate, the transmission piece and the adjusting rod are arranged in a series linkage mode, so that the first motor can synchronously adjust the opening or closing state of the multiple sealing blades when being controlled and driven; in the normal working process of the lithium battery body, efficient heat dissipation is achieved in cooperation with the ventilation pipe and the heat dissipation fan, the ventilation channel can be rapidly closed when temperature rises abnormally, external air is prevented from entering the protection shell, and the combustion condition is weakened from the environment level.

The present invention discloses a rotating machinery fault diagnosis device, including a bracket, a motor, a diagnosis mechanism and a one-way valve, wherein the upper end surface of the bracket is bolted with a motor, a support plate is movably installed on the outer side of the movable rod, and both ends of the support plate penetrate a limit rod, the side of the first bevel gear is movably provided with a second bevel gear, a movable groove is provided on the side of the support plate, a support frame is fixed on the side of the slider, and a rubber sleeve is pasted on the inner wall of the support frame, a locking bolt is threaded through the side wall of the support frame, and the interior of the support frame and one end of the docking block are connected to each other. The rotating machinery fault diagnosis device does not need to repeatedly adjust the position of the rotating machinery, but only needs to adjust the angle and position of the diagnosis mechanism, and adopts a synchronous air cooling and oil cooling method, which can improve the effect of cooling the heat of the diagnosis device and extend the service life of the device, so as to adapt to the diagnosis of different needs.

The present invention provides an exhaust system for a strong ablation test room, which relates to the field of exhaust control technology, and comprises: an exhaust tower (100); a temperature control device, the temperature control device is arranged in an exhaust chamber (1) of the exhaust tower (100) or in an air inlet chamber (3) of the exhaust tower (100), and is used to adjust the temperature of the gas in the exhaust chamber (1) or in the air inlet chamber (3); a flow guide device, the flow guide device is arranged in the exhaust chamber (1) of the exhaust tower (100), and is used to adjust its own angle according to the flow direction of the gas entering the exhaust chamber (1) to guide the gas entering the exhaust chamber (1); and a noise reduction device, the noise reduction device is arranged on the exhaust chamber inner wall (2) of the exhaust chamber (1), and is used to adjust its own height according to the noise frequency of the exhaust tower (100) during exhaust to reduce the noise level during exhaust. The exhaust system provided by the present invention can reduce the temperature of the exhaust airflow and the noise of the exhaust airflow, thereby reducing the impact of high temperature and high dryness airflow on the environment.

The utility model relates to the technical field of shield pumps, and discloses a shield pump with pressurizing and self-sucking functions, which comprises a shield pump body, liquid inlet pipes are communicated with both sides of the shield pump body, and a first mounting pipe and a second mounting pipe are fixedly connected to the inner wall of the shield pump body respectively. A first motor and a second motor are fixedly embedded in the first mounting pipe and the second mounting pipe respectively, an output shaft of the first motor penetrates through the first mounting pipe and is fixedly sleeved with a connecting rod, and an output shaft of the second motor penetrates through the second mounting pipe. The shield pump is easy to use, air in a pipeline can be pumped out through the liquid inlet pipes on the two sides for self-suction by starting the first motor and the second motor, the two sets of sealing plugs are arranged in the shield pump body, automatic sealing is achieved through the tension of the tension spring, the backflow phenomenon can be effectively prevented, the rotating connecting rods on the two sides can increase pressure for liquid, and the sealing effect is good. And finally, the liquid can be quickly discharged into a container for storage through a small-pipe-diameter liquid outlet pipe.

The utility model relates to the field of coal mine production, in particular to a deep groove spiral anti-overflow drill rod. The deep groove spiral anti-overflow drill rod comprises a rod body. Two ends of the rod body are respectively connected with a female joint and a male joint; wherein flow stopping grooves are formed in the two ends of the female connector in a penetrating mode, flow stopping assemblies are arranged in the flow stopping grooves, and water in the rod body can be prevented from flowing back through the flow stopping assemblies; the flow stopping groove is composed of a wedge-shaped groove, a thread groove and a steel ball groove. According to the deep groove spiral anti-overflow drill rod, the flow stopping assembly is arranged, the phenomenon that water in the rod body flows back can be prevented through the flow stopping assembly, flushing water is kept in the rod body, the flowing water pressurizing time during re-drilling is greatly shortened, operation is easier and more convenient, work is more reliable, and in addition, due to the use of the flow stopping assembly, the flow stopping assembly is more convenient to use. The product is low in manufacturing cost, the labor intensity of workers is reduced, the working efficiency is improved, meanwhile, the on-site working environment is improved, and standardized management of on-site safety production is facilitated.

This invention belongs to the technical field of natural gas refueling equipment and discloses a mobile natural gas refueling device, including a fixed frame and a mobile natural gas pipeline. A cover plate located outside the mobile natural gas pipeline is bolted to one side of the fixed frame. Six connecting modules are arranged in a ring at equal angles inside the outer wall of the fixed frame. A movable module connected to the fixed frame is fixedly connected to the outside of the connecting modules. An active module fixedly connected to the fixed frame is connected to the outer end of the movable module. This invention achieves the purpose of quickly and stably sealing the pipeline connection area by setting up rotating modules and connecting modules in cooperation. Its lower end will abut against the abutment block, and the abutment block will move away from the connecting module, causing the second gear to rotate. The second gear causes the sealing plate to move in the opposite direction to the abutment block and gradually move towards the middle area of ​​the two mobile natural gas pipelines until it is completely sealed.