47results about How to "Guaranteed exhaust effect" patented technology

The invention discloses an optical cable splice box with dust removal and heat dissipation functions. The optical cable splice box comprises a lower box body, a side turnover door and an upper box body, wherein the upper box body is welded to the upper part of the lower box body, and the side turnover door is rotatably connected to the front face of the upper box body through hinges. According tothe optical cable splice box, an air intake elbow pipe is driven to align with the wind intake direction through contacting of a paddle board and an external air flow, and the external air flow is ledinto the upper box body for heat dissipation, so that the use frequency of a draught fan is lowered, the service life of the draught fan is prolonged, and energy is saved. A rubber ball is driven toperiodically impact by a reverse air flow generated by driving the draught fan, and a first airbag pad and a second airbag pad have elasticity, so that dust is accelerated to be dropped from the upperpart of a purification mesh enclosure and the dust removal performance of the optical cable splice box is improved, an insulating cover is connected to the position, corresponding to window-shades, of the inner wall of a lower turnover door, and when a mosquito is killed, the body of the mosquito stuck in a high-voltage shock net can be discharged outward through conduction of the insulating cover to ensure the effects of mosquito prevention and exhausting.

The invention discloses a vulcanizing machine with an exhaust and expansion mechanism. An exhaust mechanism is arranged at the discharging end, wherein an exhaust hood can be adjusted in a lifting mode according to the height of a product to ensure the exhaust effect. The exhaust hood is matched with an exhaust passage through an organ hood to prevent exhaust gas from overflowing while the liftingadjustment is realized. An expansion part seals both ends of the expansion position of a heat-shrinkable tube workpiece through two sets of clamping transmission assemblies, so that the expansion gasis always left at the expansion position, and the heat-shrinkable tube workpiece does not need to be ventilated at all times, so that the wall thickness of each position of a heat-shrinkable tube after expansion is ensured to be consistent, the stability of the expansion process is improved, the expansion effect is ensured, and the production efficiency is improved.

The invention provides a smoke directly-discharging type environment-friendly auxiliary welding device. The device comprises a welder, a suction nozzle, a conveying pipe, a smoke filter, an exhaust fan and an energy converter and is characterized in that the energy converter is connected with the welder and the exhaust fan in a controlling mode, fixed to the welder through the suction nozzle, and connected with the suction nozzle and the smoke filter through the conveying pipe, the exhaust fan is directly connected with the smoke filter, the energy converter is an electromagnetic conversion type energy converter, the energy converter and the welder are connected to a power supply in parallel, and the magnetic fielded generated by the power supply of the welder is converted through the energy converter to drive the exhaust fan to work. According to the device, harmful gas and smoke generated by welding are directly discharged through a working point, magnetic field energy generated when the welder works can be utilized to provide exhaust power, extra electric energy does not need to be provided, and therefore exhaust power is obtained and waste energy reutilization is achieved.

The invention discloses a plastic packaging mold and relates to the field of plastic packaging of semiconductors. The plastic packaging mold comprises an upper mold body and a lower mold body used for containing a PCB. The lower surface of the upper mold body is sunken towards the upper surface of the upper mold body to form a groove. When the upper mold body and the lower mold body are pressed and combined, a molding cavity is formed between the groove and the PCB. One end of the molding cavity communicates with an air discharge duct. The end, close to the air discharge duct, of the groove is provided with a buffer area used for balancing molding flow. The molding flow in the molding cavity is balanced through the buffer area. The discharge time of the air in the molding cavity is prolonged, and the product quality is improved.

The invention provides an automatic water-preventing device for an automobile exhaust pipe. The device comprises a connecting pipe, a silencing plug, a tail end exhaust plate, a sliding rod, a slidingpiston, a front end exhaust plate, a front end exhaust hole, and a sealing piston; the silencing plug is arranged in the connecting pipe, the tail end exhaust plate is arranged in the connecting pipeand provided with a plurality of tail end exhaust holes, the sliding rod is inserted into the tail end exhaust plate, the sliding piston is fixedly connected with the sliding rod, the front end exhaust plate is arranged in the connecting pipe, the front end exhaust hole is formed in the front end exhaust plate, and the sealing piston is arranged on the sliding rod; a piston ring cavity used for containing the sealing piston is arranged in the connecting pipe, the piston ring cavity is internally provided with a lateral spring which acts on the sealing piston so as to enable the sealing pistonto be in clearance with the front end exhaust hole; and a sealing ring cavity is formed in the connecting pipe, and a rapid sealing mechanism is arranged in the piston ring cavity. According to the device, the water-preventing effect is good, the exhaust effect is ensured, and the abnormal sounds are avoided.

The invention relates to a sheet welding preventing method, which comprises the following operation flow: (1) performing copper plate pre-treatment on a circuit board; (2) screen printing a first face by using a gas-guide base plate, standing, pre-baking the first face and cooling; (3) screen printing a second face by using a waste film as a cushion, standing and pre-baking the second face; and (4) aligning, developing and post-baking. Compared with the conventional sheet welding preventing method, the sheet welding preventing method has the innovation that: the first face is screen printed by adopting the gas-guide base plate and the second face is screen printed by using the waste film as the cushion, so that working staff can better control the hole-pass inking amount in a production process and control hole blockage to be at a rational level of approximate 80 percent; the method is simple in operation, high in efficiency and high in operability; when used for manufacturing a sheet, the method can obviously improve the hole blockage effect and can effectively improve the gas exhaust effect of hole passing when blocking and printing are carried out at the same time during singleface manufacturing and avoid the phenomenon that copper is exposed from a circuit; and the traditional time-wasting nail bed screen printing is obviated, so that the printing quality of the circuit board is greatly improved and the production efficiency of sheets is improved.

The invention provides a device for classifying and preserving progesterone raw materials. The device for classifying and preserving progesterone raw materials includes a base; two storage tanks, both of which are arranged on the top of the base; and two feed pipes, which are respectively arranged at two. the top of each of the storage tanks; two discharge pipes, which are respectively arranged at the bottom of the two storage tanks; four guide wheels, all of which are arranged at the bottom of the two storage tanks At the bottom of the base, the four guide wheels are distributed in a rectangular array; the four fixing mechanisms are arranged at the bottom of the base, and the four fixing mechanisms are respectively connected with the four guide wheels. Correspondingly; two side plates, both of which are fixedly installed on the top of the base. The progesterone raw material classification and storage device provided by the invention has the advantages of convenient movement, relatively stable fixation, and the ability to discharge excess gas in the tank.