9results about How to "Fast reflow" patented technology

The utility model provides a plant soilless culture incubator capable of accurately controlling temperature, which relates to the technical field of plant cultivation equipment and comprises a box body, a revolving door is mounted on one side of the box body, a group of vertical supporting legs are mounted at corners of the bottom of the box body, and a stabilizing plate is arranged on the outer side of the box body. A positioning groove is formed in the inner side of the bottom of the box body, a storage shell is installed in the positioning groove, and the two sides of the inner side of the box body are each provided with a partition plate. The supporting frame is arranged to be matched with a rapid locking and unlocking structure of the locking frame, the cultivation height can be flexibly adjusted according to the plant growth stage, and the requirement for mixed cultivation of multiple types of plants is met; the design of the multi-layer cultivation frame effectively improves the utilization rate of cultivation space, solves the problems that the space of a traditional cultivation box is fixed and plants are crowded after growing up, and also solves the problem that a traditional culture dish is fixed through bolts.

The invention discloses an active driving heat pipe, a control method and a computer readable storage medium, and relates to the technical field of heat pipes, the active driving heat pipe comprises a pipe body, a groove, a capillary layer and an active driving part, the heat pipe is filled with working fluid, and the working fluid absorbs heat and evaporates at a heat source end in the pipe, then diffuses to a condensation end, dissipates heat and then recovers the liquid state; the working fluid flows back to the heat source end through the groove or the capillary layer, and an active driving piece is arranged in at least part of the groove area and used for driving the working fluid to move towards the heat source end. According to the design, the active driving piece is additionally arranged in the heat pipe, the flowing speed of working fluid can be increased, and the heat dissipation performance of the heat pipe can be improved.

The utility model relates to the technical field of lead zinc ore beneficiation, in particular to a lead zinc ore dense medium grading selection-flotation combined separation system which comprises a dense medium separation system and a flotation system, and the dense medium separation system comprises a crushing and screening unit, a dense medium coarse fraction separation unit, a dense medium fine fraction separation unit and a fine ore water treatment unit. An outlet of the crushing and screening unit is divided into a coarse fraction outlet, a fine fraction outlet and a fine ore outlet, the coarse fraction outlet is connected with the dense medium coarse fraction separation unit, the fine fraction outlet is connected with the dense medium fine fraction separation system, and the fine ore outlet is connected with the fine ore water treatment unit. A coarse-fraction gravity concentrate outlet of the dense-medium coarse-fraction separation unit, a fine-fraction gravity concentrate outlet of the dense-medium fine-fraction separation unit and a concentrated fine ore outlet of the fine ore water treatment unit are respectively connected with the flotation system, so that the flotation system has the advantages of high economic benefit, low production cost, energy conservation, environmental protection and the like; and the lead-zinc ore beneficiation efficiency and the metal recovery rate are effectively improved.

This application relates to the field of battery manufacturing technology and provides a protective cap transfer device and a welding production line. The protective cap transfer device of this application includes a bracket with a loading end and a unloading end, two transfer devices respectively disposed at the loading end and the unloading end, and a conveying device arranged between the loading end and the unloading end; the loading end and the unloading end are arranged at a distance along a first direction, and the conveying device includes a fixture capable of reciprocating along the first direction; the transfer device at the loading end can remove the protective cap from the welded battery cell and transfer the protective cap to the fixture, which can then convey the protective cap to the transfer device at the unloading end, where the transfer device assembles the protective cap onto the battery cell before welding. The protective cap transfer device of this application reduces the time the battery cell spends at the welding station, lowers the waiting time of the welding equipment, improves the utilization rate of the welding equipment, and is beneficial to improving welding efficiency.

The utility model provides a gear shaft with lubrication belongs to mechanical technical field. It has solved the problem of complex structure of existing gear shaft. The gear shaft with lubrication of this utility model includes the hollow axle body, the outer gear is formed on the axle body upper end, the axle body lower end is vertically equipped with a ring of keyway, the lower end inner wall of axle body has a section of taper guide surface, the guide surface and axle body coaxial arrangement, the keyway upper end extends to the guide surface, the inside wall of axle body is horizontally formed with the support block, the support block upper side is equipped with the recessed cavity, the recessed cavity bottom wall is vertically penetrated with a ring of along the axle body circumferential distribution oil hole, every oil hole is opposite the guide surface setting, the side wall of axle body is equipped with the oil injection hole of making the recessed cavity communicate with the outside of axle body. The gear shaft with lubrication of this utility model simple structure.

The invention discloses a multi-layer circuit board via hole non-stub preparation device, and relates to the field of multi-layer circuit board preparation, the multi-layer circuit board via hole non-stub preparation device comprises a multi-layer circuit board and a processing groove used for processing the surface of the multi-layer circuit board, the multi-layer circuit board is provided with a plurality of through holes, and the processing groove is fixedly connected with a moving track. A vertical moving assembly is fixedly connected to the moving end of the moving rail and used for driving the vertical moving assembly to move in the length direction of the processing groove. Local plugging of the through hole is achieved through the plugging assembly, the through hole is divided into a copper-plating-free area and a target copper-plating area through the two silicon rubber cases on the plug, only electroplating liquid is allowed to enter the target copper-plating area through the open hole in the connecting pipe, and generation of redundant copper columns is eradicated fundamentally; meanwhile, the check ring precisely limits the insertion depth of the plug, it is ensured that the copper plating area is precisely positioned, interference of the stub on high-speed signal transmission is effectively avoided, the signal integrity and reliability of the multi-layer circuit board are improved, and the use requirements of high-end electronic equipment are met.

The utility model discloses a combined oil return sealing structure which comprises a main shaft, an oil slinger, an end cover and a labyrinth type oil seal. The main shaft is divided into a primary shaft and a secondary shaft from left to right, the radius of the primary shaft is smaller than that of the secondary shaft, the left end of the primary shaft penetrates through the transmission device, and an annular groove is formed in the right end of the primary shaft; the oil slinger is assembled on the primary shaft, the left side of the oil slinger is attached to the right side of the transmission device, and the right side of the oil slinger is attached to the left side face of the secondary shaft. The labyrinth type oil seal is installed on the secondary shaft in a clearance mode, a trapezoid ring groove and an annular boss are arranged on the outer side of the labyrinth type oil seal, the annular boss is in clearance fit with a groove in the corresponding position of the end cover, and a plurality of ring grooves are formed in an inner hole of the labyrinth type oil seal; a plurality of oil holes communicated with the annular groove are further formed in the labyrinth type oil seal, and an axial hole jointly communicated with the oil holes is further formed in the labyrinth type oil seal. According to the utility model, a sealing structure and a lubricating oil backflow path are optimized, the oil return efficiency is improved, and the risks of retention and oil degradation are reduced; meanwhile, the oil leakage risk is effectively reduced.

This utility model discloses a low-blow-gas, low-oil-consumption piston assembly suitable for hydrogen fuel cell engines, including a piston ring assembly and a piston; the piston has a first ring groove and a second ring groove arranged sequentially from top to bottom; the piston ring assembly includes a top ring and an oil scraper ring, which are respectively disposed in the first ring groove and the second ring groove; the top ring includes a ring body and a scraper, the lower end face of the ring body has a first groove that runs through the circumference, which extends from the outer edge of the ring body inward for embedding the scraper, and the scraper can extend and retract radially along the first groove; the ring body and the scraper are respectively provided with a first and a second opening that runs through the radial and axial directions, and the offset angle α of the two openings on the circumference satisfies 90°≤α≤180°; the outer circular surface of the oil scraper ring is a combination of a vertical surface and a conical surface, and the vertical surface is located below the conical surface; the height g of the vertical surface satisfies 0.1mm≤g≤0.7mm; the conical surface is inclined from the vertical surface towards the center of the oil scraper ring, and the inclination angle γ satisfies 1.5°≤γ≤2.5°; and the inner side of the oil scraper ring near the upper end face has a triangular notch.

The utility model discloses a kind of compressor refrigeration system quick oil return device and refrigeration system, including compressor, gas-liquid separation tank, still including oil temporary storage tank;The liquid outlet of gas-liquid separation tank is communicated with oil temporary storage tank by liquid outlet pipeline;Oil temporary storage tank is communicated with the suction port of compressor by oil return pipeline;Oil temporary storage tank and compressor outlet are communicated by power line;First control assembly is set on the power line, second control assembly is set on the liquid outlet pipeline.The utility model increases the process of temporary storage tank flow, power line by in compressor refrigeration system, realize the quick backflow of lubricating oil in pipeline, avoid screw compressor long-term low oil level operation, ensure that compressor normal operation.