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 calibration of basic parameters of mass spectrometers, and provides a method for on-orbit calibration of basic parameters of mass spectrometers, which comprises the following steps of: heating silicate minerals under a vacuum condition by utilizing the characteristic that the silicate minerals can adsorb gases in the environment in a molten state to obtain molten silicate minerals; placing the sample in a standard gas environment for adsorption, then rapidly cooling to obtain a standard sample, and then pre-installing the standard sample in a thermal control device of a mass spectrometer. After the mass spectrometer enters a predetermined track, when the mass spectrometer needs to be used for material testing, carrying out on-track heating on the standard sample to release the adsorbed standard gas into the mass spectrometer so as to realize calibration of basic parameters of the mass spectrometer. The silicate minerals do not release gas before being heated, so that the risk of gas leakage caused by using a standard gas cylinder is avoided, a valve matched with the gas cylinder is not needed, the weight of the mass spectrometer is reduced, and the rocket launching cost is further reduced.

The invention discloses an oxalic acid conveying device. The oxalic acid conveying device comprises a box, a box cover and a plurality of separation plates. The box is formed by an upper side plate, a lower side plate, a left side plate, a right side plate and a rear side plate in a surrounded mode. The box cover covers a front side box opening of the box in a seal mode. The separation plates are arranged up and down and welded in the box. The box is divided into a plurality of areas by the separation plates. A heating plate is installed in each area. A gas inlet connector used for leading in nitrogen gas is arranged in the position, close to the bottom end, of the left side plate or the right side plate of the box. The separation plates are provided with ports for ventilation. A gas outlet connector is arranged on the upper side plate and is provided with a gas channel used for communicating with a furnace liner reaction cavity of a debinding furnace. According to the designed oxalic acid conveying device, supply of a gas oxalic acid catalyst is achieved, thus the debinding furnace decomposes polyformaldehyde through gas oxalic acid as the catalyst, the problem that oxalic acid can enter the debinding furnace after sublimation in the catalytic debinding process is solved, so that conveying supply can also be completed without the usage of compressed air.

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 a bushing with a retractable air receiving pipe, which is characterized in that a groove is arranged inwards on a wall of the bushing, a cylindrical body is arranged in the groove, the cylindrical body comprises an air course, an air receiving pipe which can slide relative to the axial direction of the cylindrical body is sleeved on the cylindrical body, the air receiving pipe comprises an air passage, an air core is also arranged in the air passage, the diameter of the air core is equal to the inner diameter of the cylindrical body, when the air receiving pipe is arranged on a first position of the bushing, the air core is plugged into the air course of the cylindrical body; and when the air receiving pipe is arranged on a second position of the bushing, the air core moves out of the air course of the cylindrical body. The bushing has the beneficial effects that the structure of the air receiving pipe which is used for being communicated or disconnected with an air source and retractable connection and movement relation between the air receiving pipe and the bushing are more reasonable than a bushing structure of the prior art, so that the bushing is difficult to touch by a doctor in an operation process, an air leakage danger in the operation can be avoided, and the safety coefficient is increased.

The invention discloses a multifunctional integrated pre-filter of an air source system and a filtering method thereof. The pre-filter includes a filter cartridge one, a filter cartridge two, an upper connecting plate and a lower connecting plate, and an air inlet and an air outlet are respectively arranged On both sides of the upper connecting plate, there is also an air channel inside the upper connecting plate, and the air inlet and the air outlet are connected together with the filter cartridge 1 and the filter cartridge 2 through the air channel, so that after the compressed air enters from the air inlet, it can After passing through filter cartridge 1 and filter cartridge 2 in turn, it is discharged through the air outlet; storage chambers are provided at the bottom of the inner cavity of filter cartridge 1 and filter cartridge 2, and a heating rod device is installed inside the lower connecting plate. There is a drain valve device and an electromagnetic control device, and a drainage channel is arranged inside the lower connecting plate, and the storage chamber communicates with the drain valve device through the drain channel, so that when the electromagnetic control device controls the drain valve device to open, the liquid water in the storage chamber and the The liquid oil can be discharged sequentially through the drain channel and the drain valve device.

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.

The invention discloses a wind power blade blade root pre-embedded bolt positioning device and method, comprising a blade root reinforcement layer laid on a mould, one end inserted into the blade root reinforcement layer, and the other end inserted into a flange plate The bolt sleeve, and the positioning bolt inserted into the bolt sleeve through the flange plate, a positioning bush for correcting the axis center of the positioning bolt is arranged between the positioning bolt and the flange plate, and the bolt sleeve is inserted into the blade One end in the root reinforcement layer is provided with a sealing insert for sealing the bolt sleeve, a sealing element I is provided between the bolt sleeve and the flange plate, a sealing element II is provided between the mold and the flange plate, and the positioning A sealing element III is arranged between the bolt and the flange plate. The invention can locate and orientate the bolt sleeves, ensure the sealing between the auxiliary tooling and the mold surface of the blade root, and accelerate the solidification speed of the blade root through heating.

The invention relates to a solar sail spacecraft three-axis attitude control and execution mechanism which is divided into a sliding mass block and a moving small sail. The solar sail spacecraft three-axis attitude control and execution mechanism comprises a support rod, the sliding bock, the small sail, a telescopic rod and a support frame. The support rod supports the spacecraft sail face, and the sliding block is embedded on the support rod and can slide along the support rod. One end of the telescopic rod is connected with the small sail, and the other end of the telescopic rod is fixedly connected to the support frame. The telescopic rod can telescope and rotate, the length of the telescopic rod is adjusted through linear telescoping, and the small sail is driven to rotate through rotation of the telescopic rod. The bottom end of the support frame is fixed to the geometric center of the spacecraft sail face, and the top end of the support frame is connected with a spacecraft load. According to the solar sail spacecraft three-axis attitude control and execution mechanism, torque needed by solar sail three-axis attitude control, sunlight is completely utilized for supplying energy, the structure is simple, and unfolding of the spacecraft sail face is not affected. By means of the solar sail spacecraft three-axis attitude control and execution mechanism, rolling shaft torque can be provided rapidly, and adjustable range of amplitude of the torque is large.