31results about How to "Avoid the risk of air leaks" patented technology

The invention relates to the field of gas equipment, in particular to a gas distribution disk, a burner, a gas stove, an oven and a machining die for the gas distribution disk. The gas distribution disk is of an integrated core pulling and die casting structure. One or more gas distribution bins (3) are formed between the lower surface of a gas distribution disk upper component (1) and the upper surface of a gas distribution disk lower component (2). The gas distribution bins (3) communicate with a gas outlet of a burner head outer ring gas mixing channel (5) and a gas outlet of an outer ring fire cover (6). According to the technology, the gas distribution disk is formed through integrated die casting and core pulling machining; by means of the machining mode, compared with die casting forming of a split structure, the split assembling machining processes are decreased through integrated forming, the cost is reduced, the gas leakage risk caused by high-temperature aging deformation is avoided, and thus the gas distribution disk is more stable, easy to machine and high in finished product quality; and compared with sand core casting forming, the product consistency is better, and the gas distribution disk is more beautiful in appearance and smoother in inner wall compared with the appearance and the inner wall of an iron casting piece.

The invention relates to the technical field of lithium-ion batteries, and discloses a cylindrical lithium-ion battery packaged in aluminum-plastic film, which includes a cylindrical battery cell, an aluminum-plastic film bag, a positive ear, a negative ear, and one of the positive ear and the negative ear. There are two ear glues on the top, that is, the first ear glue and the second ear glue, and there is one ear glue on the other ear, that is, the third ear glue, the second ear glue, and the third pole ear glue. The ear gels are respectively thermally melted with the aluminum-plastic film bag to form two edge seals, and an air bag is provided between the first ear gel and one of the end seals. The invention adopts two tabs of tab glue, so that the positive and negative tabs are respectively located at both ends of the battery cell, and at the same time the air bag is located at one end of the battery cell, which greatly improves the efficiency of aluminum-plastic film packaging of cylindrical lithium-ion batteries. Flexibility in design and production; increase the speed of electrolyte injection into the cell; reduce the aluminum-plastic film punching process, save production costs, and avoid the risk of aluminum-plastic film leakage caused by punching.

The invention belongs to the field of solar photovoltaic power generation, in particular to an automatic phosphorus oxychloride liquid-replenishing device for a diffusion furnace in solar battery production, which comprises a phosphorus oxychloride storage tank and a source bottle, wherein the phosphorus oxychloride storage tank and the source bottle are communicated through a pipeline with a cut-off valve, the lower end of the pipeline stretches into the source bottle, and the distance from an outlet hole at the bottom end of the pipeline to the bottom of the source bottle basically equals to the liquid level height set in the source bottle. Through the automatic liquid-replenishing device, the trouble of taking the source bottle out of a thermostatic bath to observe the liquid level every time is avoided, the operation is convenient, the temperature of the source bottle can not fluctuate, and automatic continuous liquid replenishment without energy driving is realized; the accuracy of liquid level control is high, the quality of the product and the stability of the process are improved, the production efficiency is increased, and the production cost is reduced.

The invention discloses an oxalic acid feeding machine. The oxalic acid feeding machine comprises a charge mechanism, a feeding mechanism and a gas transmission mechanism, wherein the charge mechanism comprises a funnel-shaped storage box, a box cover covering the upper port of the storage box in a sealing manner, a vertical barrel-shaped connection piece communicating with the lower port of the storage box, and a horizontal sleeve arranged at the bottom end of the connection piece, a filler connector is arranged in the box cover, and a discharge port communicating with the connection piece is arranged in the upper end surface of the horizontal sleeve; the gas transmission mechanism comprises a sublimation box, heating wires arranged at the bottom in the sublimation box, and a partition covering the heating wires, a gas inlet connector used for connecting nitrogen gas and a gas outlet connector connected with the interior of a degreasing furnace through a gas channel are arranged in the sublimation box respectively, a feeding port is formed in one side of the sublimation box, and one end of the sleeve is installed on the feeding port in a communication manner; and the feeding mechanism comprises a movable block movably connected in the sleeve in an insertion manner, and a receiving hole penetrating through from top to bottom is formed in one end facing the feeding port, of the movable block. The oxalic acid feeding machine disclosed by the invention realizes supply of a gaseous oxalic acid catalyst, so that the degreasing furnace decomposes polyformaldehyde by taking gaseous oxalic acid as the catalyst.