46results about How to "Solve the retention" patented technology

A debris exclusion and retention device traps and retains foreign material within the lower tie plate of the fuel assembly utilizing the existing flow paths within the lower tie plate, and without redirecting coolant flow. Flow through the inlet nozzle of the lower tie plate into an enlarged lower tie plate housing creates strong jet impingement against the center of the lower tie plate grid or debris filter, if present, which has a tendency to push debris to the periphery of the lower tie plate. Low flow zones around the periphery of the lower tie plate allow debris to fall back toward the inlet nozzle. The retention device traps and retains debris in these low flow zones without impacting existing flow patterns in the lower tie plate. Thus, the retention device has minimal or no impact on lower tie plate pressure drop.

The invention discloses a collection device and a collection method of a concrete pore solution. The collection device of the concrete pore solution comprises a peristaltic gas guide control device, a degassing and pressure buffering device, a concrete pore solution squeezing device, a filter tip, filter paper, a collection bottle, a rubber tube and a connection guide pipe. The collection method of the concrete pore solution comprises the following steps: before squeezing a concrete test piece, starting the peristaltic gas guide control device so as to facilitate air to generate flowing circulation; removing carbon dioxide in air flow through the degassing and pressure buffering device; in a pore solution collection process, forming a pressure difference state that the filter tip has positive pressure and the collection bottle has negative pressure. According to the collection device and the collection method of the concrete pore solution, carbonization-free collection of the concrete pore solution is realized, and efficient collection of the concrete pore solution is realized through a structural design of the concrete pore solution squeezing device.

The invention provides an audio and video synchronization device and method based on an HLS protocol. The method comprises: after receiving a synchronization request, adding a synchronization mark to audio and video data obtained first; demultiplexing the audio and video data into audio data and video data, and updating timestamps of the audio data and / or video data based on the synchronization mark; decoding the audio data and video data and outputting an audio signal to be played and a video signal to be played; detecting whether the timestamps carried in the audio signal to be played and the video signal to be played are consistent, and sending the synchronization request when the timestamps carried in the audio signal to be played and the video signal to be played are not consistent; and controlling the audio signal to be played and the video signal to be played to be output synchronously based on the synchronization mark. Through the technical scheme in the invention, the problem of picture or sound retention due to continuous nonsynchronization of the audio and video is solved.

The invention discloses a dredging type tubular heat exchanging device for sewage or surface water and belongs to the technical field of energy. The dredging type tubular heat exchanging device aims at solving the problem that the plate type structure of the existing sewage heat exchanging device is insufficient in loading capacity, severe in water leakage accident, large in steel consumption of a sleeve structure and the like and connection blocking can be caused by suspended solids at an orifice. A multilayer heat exchanging tube is arranged in a casing, two ends of the multilayer heat exchanging tube is fixedly connected with a left tube plate and a right tube plate, the left tube plate, the right tube plate and a left end socket and a right end socket of sewage or surface water define a sewage or surface water left transition cavity and a sewage or surface water right transition cavity, a left clean water channel and a right clean water channel are arranged in the casing, and the sewage or surface water left transition cavity is communicated with the orifice of the heat exchanging tube at the corresponding layer; and the sewage or surface water left transition cavity is divided into two sewage or surface water left transition cavity units through a second vertical partition plate, the top end of the sewage or surface water right transition cavity is provided with a sewage or surface water outlet or inlet, and a sewage or surface water outlet or inlet is arranged at the bottom end of the sewage or surface water right transition cavity. The dredging type tubular heat exchanging device for sewage or surface water is used for blocking-free and efficient heat exchanging between sewage or surface water and clean water during cold energy extracting in the sewage or surface water.

The invention belongs to the technical field of energy resources and relates to a forcible dredging type tubular heat exchange device for sewage or surface water. The forcible dredging type tubular heat exchange device for the sewage or surface water aims to solve the problems that an existing wide-flow-passage plate type structure is insufficient in pressure bearing capability and severe in water leakage accidents and results in retention of suspended matters and impurities, a tubular structure orifice is prone to blockage and the like. The device comprises a flow passage separation device, header dredging devices, heat exchange tubes, a shell, two tube plates, two headers, two seal heads, baffle plates, diaphragm plates, diaphragm plate holes, a sewage or surface water inlet, a sewage or surface water outlet, a heat exchange media inlet, a heat exchange media outlet and the like. The sewage or surface water flows into the device from the inlet and then flows backwards sequentially by means of blocking of the header dredging devices after being subjected to flow passage separation of the flow passage separation device, and performs heat exchange with heat exchange media outside the tubes during flowing, and after entering the device from the inlet, the heat exchange media baffle and flow in the shell by means of blocking of the diaphragm plates and the baffle plates and performs heat exchange with the sewage or surface water in the tubes during flowing. The forcible dredging type tubular heat exchange device for the sewage or surface water is used for heat exchange of the sewage or surface water with the heat exchange media.

The invention discloses a divided-flow secondary injection flow passage device of an ejection forming machine, which comprises a machine barrel nozzle, an injection cylinder assembly and a flow passage connector connected to the output end of the machine barrel nozzle and the input end of the injection cylinder assembly; an injection rod capable of moving along the axial direction of the injection cylinder assembly is arranged in the injection cylinder assembly; the injection cylinder assembly is internally provided with two storage flow passages corresponding to the end parts of the injection rod; and the output end of the inner cavity of the flow passage connector comprises interfaces matched with the two storage flow passages. The problem of remaining remainder is radically solved, and the quality of the products is effectively ensured. In addition, the process regulating range is wider, and the production efficiency is favorably improved.