103results about How to "Increase airflow" patented technology

The invention belongs to the technical field of chip processing, and discloses a wafer laser cutting device based on chip processing, which comprises a vibration mechanism, the vibration mechanism comprises four sliding blocks, the interiors of the sliding blocks are fixedly connected with first motors, and the first motors are rotatably connected with cams; through cooperation of the cam, the clamping plates and other structures, the laser cutting effect of the wafer is improved, the first motor is started to enable the wafer clamped among the four clamping plates to generate slight vibration in the vertical direction, the slight vibration promotes micro movement of a material in the laser cutting process, better interaction between a laser beam and the material is facilitated, and the laser cutting efficiency is improved. A more uniform and smoother cutting face is achieved, the vibration effect can accelerate the melting or crushing process of materials, the cutting time is shortened, the cutting efficiency is improved, meanwhile, vibration can accelerate airflow on the surface of a wafer, a certain heat dissipation effect is achieved, local overheating of the materials is reduced, expansion of a heat affected zone is avoided, and the flatness of the cutting edge is improved.

The invention discloses an explosion-proof motor for an underground coal mine, and relates to the technical field of explosion-proof motors, and the explosion-proof motor comprises a housing, the outer wall of the housing is fixedly connected with a plurality of short fins at equal intervals, the inner wall of the housing is fixedly connected with a stator around the circumference, and the inner wall of the center of the housing is rotatably connected with a rotating shaft. Through vertical separation of the flow guide plate and flow guide of concave arc faces on the two sides, the resistance of hot air shunting to the two sides can be reduced, after the hot air enters the ventilation cavity, the heat dissipation area is increased under the flat arrangement of the hot air, and heat on the surface of the ventilation cavity is rapidly guided out through cooperation of the unfolded first fins, the unfolded second fins and the unfolded third fins, so that the heat dissipation efficiency is improved. The temperature exchange rate can be increased through double heat conduction, hot air in the ventilation cavity can be rapidly cooled, airflow and temperature on the two sides can be balanced, the stability of the system is improved, the equipment temperature can be reduced through good heat dissipation, and electric sparks caused by overheating are reduced.

The utility model discloses a desizing wastewater treatment pond which comprises a wastewater treatment pond, a plurality of airflow pipelines are uniformly arranged at the bottom of the wastewater treatment pond, a plurality of aeration discs are arranged on the airflow pipelines, the airflow pipelines are gathered to a main air pipe, and the main air pipe is communicated with an external air inlet pipeline. An air flow control box for adjusting the air flow in the air inlet pipeline is arranged on the air inlet pipeline, a rotating rod is rotationally connected to one side of the air flow control box, the rotating angle of the rotating rod corresponds to the air flow in the air inlet pipeline, and a rotating adjusting structure for adjusting the angle of the rotating rod is arranged on the rotating rod. The rotating angle of the rotating rod rotates according to the change of the liquid level of the wastewater treatment tank, and the wastewater treatment tank is provided with a water outlet facilitating water drainage; according to the treatment tank, the aeration can be changed along with the change of the liquid level in the tank, and the use effect is improved.

The invention relates to the technical field of heat dissipation, in particular to an airflow generator, an airflow fan and an array airflow fan. The airflow generator comprises a surrounding plate, a resonant diaphragm, a back plate and a lead. The surrounding plate is provided with a through hole, the two ends of the through hole are provided with a resonant diaphragm and a back plate respectively, and the surrounding plate, the resonant diaphragm and the back plate jointly define a cavity. The resonance diaphragm comprises a thin film and piezoelectric ceramics, the thin film is connected with the surrounding plate, the piezoelectric ceramics are connected to the thin film, and the vibration frequency of the resonance diaphragm is larger than or equal to 20 kHz. The back plate is provided with an inlet and an outlet, and the inlet and the outlet are both communicated with the cavity. And the lead is connected with the piezoelectric ceramic. The pressure of the gas in the cavity is changed through the vibration of the resonant diaphragm, and the gas continuously enters the cavity from the inlet and then flows out from the outlet under the action of the pressure difference of the internal gas and the external gas, so that the continuous, stable and low-noise gas flow can be formed.

The invention discloses an electric power inspection robot, and belongs to the technical field of inspection robots, the electric power inspection robot comprises an equipment shell, the upper part of the equipment shell is provided with visual sensing equipment, the lower part of the equipment shell is provided with a walking mechanism, the lower end of the equipment shell is fixedly provided with a robot chassis, and the lower part of the robot chassis is provided with a reciprocating swing obstacle removing mechanism; according to the invention, through the arrangement of the blowing cooling mechanism, reciprocating swing operation of a reciprocating swing arm can drive a butt joint sliding column to do linear reciprocating motion, so that an extrusion plate in reciprocating motion can intermittently extrude a blowing air bag, and after the blowing air bag is extruded, low-temperature airflow is sprayed out through a blowing calandria to carry out air cooling treatment on the power supply mechanism; through the arranged blowing cooling mechanism, reciprocating swing operation of a reciprocating swing arm can drive a butt joint sliding column to do linear reciprocating motion, in this way, an extrusion plate in reciprocating operation can intermittently extrude a blowing air bag, and after the blowing air bag is extruded, low-temperature airflow is sprayed out through a blowing calandria to conduct air cooling treatment on the power supply mechanism.

The invention belongs to the technical field of electrical cabinets, particularly relates to a power distribution cabinet convenient for heat dissipation, and provides the following scheme: the power distribution cabinet comprises a cabinet body and two frames; the frame is fixed on two sides of the top of the cabinet body, a heat dissipation cavity is formed between the frame and the cabinet body, cabinet door plates are detachably connected to two ends of the cabinet body, and screen plates are arranged on the cabinet door plates at positions corresponding to the heat dissipation cavity; sliding grooves are formed in the side walls and the bottoms of the frames, a plurality of air holes are formed in the side walls, facing the cabinet body, of the frames, the air holes in the sliding grooves are distributed in the positions of one ends of the frames, the air holes in the two frames are distributed in the symmetrical positions of the two ends, and movable baffles are arranged on the sliding grooves in a sliding mode. According to the invention, the air hole coverage area is changed in a reciprocating manner through the movable baffle plate, so that the range of the led-out airflow is continuously changed, the hot airflow is prevented from flowing towards a single direction all the time to be gathered, and the heat dissipation effect and cooling efficiency in the cabinet body in a normal state are improved.

The utility model relates to the technical field of treatment ponds, and particularly discloses a static treatment pond structure of an aquaculture auxiliary pond, which comprises a water pond and a filter component arranged in the water pond, a water outlet pipe body and a water inlet pipe body are arranged on the side edge of the water pond and are both communicated with the water pond, the ends, away from the water pond, of the water outlet pipe body and the water inlet pipe body are connected with an external culture pond, and the water inlet pipe body comprises a first extending pipe body and a central drainage valve which is arranged in a water collecting pit at the bottom of the culture pond. One end of the first extension pipe body is communicated with the pool, and one end far away from the pool extends to the culture pond sump and is communicated with the central drain valve.

The application relates to a heat dissipation technology field of a fuel cell, in particular to a heat dissipation device integrated with anti-vibration and a fuel cell heat dissipation system, which comprises a shell, a fan arranged in the shell and a heat exchanger arranged on the side of the shell, and further comprises two opposite vertical arms arranged in the shell, a plurality of guide vanes corresponding to the gaps between two adjacent fins of the heat exchanger are rotatably arranged between the two vertical arms; the inclined guide vanes can change the flow direction of the airflow, so that the airflow can directly impact the wall surface of the fin, thereby effectively destroying the airflow layer wrapped on the fin due to vibration and not easy to flow, when the vibration intensity increases, the swing amplitude of the guide vanes increases, so that the stripping effect of the airflow on the low-speed airflow layer attached to the wall surface of the fin is more intense, the stripping effect of the airflow layer automatically matches the current vibration condition, the speed regulation mechanism increases the rotating speed of the fan, compensates for the additional wind resistance loss, and ensures that the convective heat exchange efficiency is maintained under different intensity vibration working conditions.

The utility model discloses a belt clamping type guide chute, and particularly relates to the technical field of belt guide chutes, which comprises a guide frame and a top plate fixedly connected with the top of the guide frame. The rotating rod is arranged at one end of the threaded rod, the sliding strip is arranged on the outer wall of the rotating rod, the disc is arranged on the outer wall of the rotating rod, and the first movable plate is arranged on the outer wall of the disc, so that the extrusion rod can drive the spill-proof plate to move. The design purpose of the dust suppression type material guide groove can optimize settling of dust-containing air and settling of any floating dust, because the dust suppression type material guide groove can prolong air flow and further reduce the air flow speed, in the material guide groove, a high baffle with a coating is used, the outer portion of the material guide groove is sealed through cooperation of a belt sealing support and an anti-overflow skirt edge, and when a belt in the material guide groove is used for a long time, the dust suppression type material guide groove does not fall off. And the sealing performance between the bottom of the spill-proof plate and the belt can be adjusted by the equipment, so that the sealing performance of the equipment cannot be reduced.

The utility model discloses a top air outlet type air conditioner outdoor unit which comprises a machine shell comprising a base plate formed by splicing a first bottom plate and a second bottom plate. The outdoor heat exchanger is arranged on the base plate and defines a heat exchange space, and a notch is formed in the side wall of the outdoor heat exchanger and comprises a first notch section and a second notch section. The compressor is arranged in the heat exchange space, is arranged on the first bottom plate and is close to the first notch section; the gas-liquid separator is arranged on the second bottom plate and is close to the first bottom plate; the oil separator is arranged on the first bottom plate and located on the side, away from the first notch section, of the compressor. The stop valve is close to the first notch section relative to the gas-liquid separator, and the projection of the stop valve on the chassis is located on the second bottom plate; and the four-way valve is arranged on the side, away from the first notch section, of the stop valve, the height of the four-way valve is between the height of the stop valve and the height of the gas-liquid separator, reasonable layout of all parts of the outdoor unit in a limited space is achieved, and manufacturability and maintainability are both considered while the space utilization rate is increased.

The utility model belongs to the technical field of guide plates, in particular to a motor front end cover installation guide plate, which comprises a motor main body and an outer guide cover plate, a front bearing oil cup cover is arranged at the front end of the motor main body, and a screw hole and a through hole are arranged on the outer guide cover plate in a penetrating manner. A front end cover and a front bearing oil cup cover of the motor body are in threaded connection with screw holes in the outer flow guide cover plate through bolts, a connecting rod is arranged in the outer flow guide cover plate, one end of the connecting rod is welded to the inner flow guide cover plate, and an air hole is formed in the middle of the inner flow guide cover plate in a penetrating mode. According to the device, the convection heat exchange efficiency and the heat dissipation air volume between the air and the front end cover and between the air and the front bearing oil cup cover are improved, so that the temperature of the front end bearing is effectively reduced, overheating of the motor bearing and rapid aging of bearing oil are effectively avoided, the replacement period of the bearing oil is prolonged, and the service life of the bearing is prolonged.

The present invention discloses a PTFE lining flanging device for an electromagnetic flowmeter, and relates to the technical field of electromagnetic flowmeters. The PTFE lining flanging device for an electromagnetic flowmeter comprises an external control mechanism for external control, a rotary extrusion mechanism for rotational extrusion, a pressure water spray mechanism for water spray cooling, and a thermal expansion and contraction mechanism for generating extrusion based on thermal expansion and contraction. A bottom plate is arranged inside the external control mechanism, and the external control mechanism is fixedly connected to the rotary extrusion mechanism through the top of the bottom plate. The PTFE lining flanging device for an electromagnetic flowmeter cools the surface of the pressing cone block through the water outlet and the water cooling port. In the process of the pressing cone block leaving, the water sprayed from the water outlet is poured into the pressing cone block, and the pressing cone block can be fully cooled during the cooling of the flanging material, thereby ensuring the cooling of the flanging material.

The invention discloses a fire-fighting spraying and fire barrier system for a high-rise building, and relates to the technical field of fire-fighting systems. The high-rise building fire-fighting spraying and fire barrier system comprises a water source, a water supply pipeline, a control device, a nozzle and a fireproof material, the control device comprises a smoke detector, an alarm valve group, a water flow indicator and a signal valve, and the smoke detector comprises a protective cover and a smoke sensor body arranged in the protective cover; and a pressurizing mechanism is arranged in the protective cover. According to the fire-fighting spraying and fire barrier system for the high-rise building, through the design of the pressurizing mechanism, the pressurizing mechanism can be started conveniently when the smoke sensor main body detects the smoke content and the smoke content does not reach a set threshold value, the airflow circulation speed is increased, and therefore nearby air is pressurized and actively sucked after smoke sensing, and the safety of the high-rise building is improved. The alarm can be triggered at the first time when the smoke is increased, and the sensitivity of the smoke sensor main body is improved.

The present invention discloses an energy-saving and noise-reducing low-pressure fan, which relates to the field of fans and comprises a base, wherein a driving member is arranged at the upper end of the base, a transmission member is arranged at the output end of the driving member, and a support block is arranged at one end of the transmission member away from the driving member, a driving cylinder is arranged at the end of the support block, and a protective component is rotatably installed on the inner wall of the driving cylinder, and the end of the transmission member is limited by the protective component; the energy-saving and noise-reducing low-pressure fan limits an adjustment plate by a push block and a limiting block, and then adjusts the position of the push block so that the part surrounded by the adjustment plate is in a forward cone or a reverse cone, and reduces the airflow velocity and pressure loss by gradually increasing the cross-sectional area of ​​the airflow channel, and accelerates the airflow by gradually reducing the cross-sectional area of ​​the airflow channel, thereby improving the efficiency of the fan and reducing the noise.

The invention discloses a tuyere honeycomb guide plate structure and device suitable for uniform distribution of a wind field of large-breadth metal additive equipment, and relates to the technical field of metal 3D printing. The tuyere honeycomb flow guide plate structure comprises a tuyere honeycomb flow guide plate structure body, a third jet flow channel is arranged in the tuyere honeycomb flow guide plate structure body, the third jet flow channel is of a gradient caliber, and the third jet flow channel comprises a first jet flow channel, a fourth jet flow channel and a second jet flow channel. An air inlet is formed in the side end, close to one side, of the tuyere honeycomb guide plate structure body; air flow is introduced into the air blowing structure and rectified through the air opening honeycomb flow guide plate structures evenly distributed in the air field of the large-breadth metal additive equipment, air flow parallel to the front is obtained, the air suction structure sucks air after being externally connected with the draught fan, the air flow on the forming plane shows the uniform flow speed and the high average air flow strength, and the air flow in the forming plane is uniform in flow speed and high in average air flow strength. In this way, smoke dust at all positions in the machining process can be effectively removed.

This invention discloses a roughness testing device and method for plastic-coated steel pipes, belonging to the field of steel pipe testing technology. It includes an operating table, with an equipment box bolted to its upper surface. A wide-angle high-definition camera is mounted on the lower surface of the equipment box. A fixing plate and a connecting plate are bolted to the upper surface of the operating table. A motor is bolted to the outer wall of the fixing plate. During operation, the device transfers the workpiece to the operating table using a robotic arm. An electric telescopic rod then drives a clamping plate to hold the workpiece. The motor then rotates the connecting plate and the clamping plate, allowing the wide-angle high-definition camera to perform a comprehensive inspection of the workpiece. A cleaning roller cleans the workpiece, removing particulate impurities from its surface, thus improving the accuracy of the wide-angle high-definition camera's results.

The utility model relates to garbage can inner bag manufacturing equipment technical field, and disclose a kind of injection mould rapid cooling's garbage can inner bag manufacturing equipment, including base and fixedly installed lower die holder on the upper end of base, the upper end of lower die holder is installed with upper die holder, cooling structure is installed on the lateral wall of lower die holder and upper die holder, injection liquid is introduced from injection port, using the cooperation of mould core and mould cavity can be shaped to injection liquid, the heat conduction layer of cooperation arrangement is favorable to the heat dissipation of mould core, in the process, start suction pump, and cooperate with duct and suction pipe can be drawn into cooling channel, can realize the purpose of air cooling, start a group of pump body simultaneously, and cooperate with water cooling pipe and circulating pipe can extract cooling liquid in water tank to cooling cavity, can carry out cooling to injection liquid, can realize the cooperation cooling of injection liquid air cooling and water cooling, shorten the forming time of injection liquid, effectively improve production efficiency.

The utility model relates to the technical field of plenum chambers, in particular to an adjustable plenum chamber air supply structure which comprises a chamber body, an air inlet pipe, an air supply pipe, a driving assembly, a guide assembly, an adjusting assembly, a mounting assembly and a filtering assembly. An air inlet pipe is arranged on one side of the box body, an air supply pipe is arranged on the other side of the box body, a driving assembly is arranged on the side wall of the box body, a guide assembly is arranged on the inner wall of the box body, an adjusting assembly with an adjusting function is arranged below the guide assembly, a mounting assembly is arranged in the box body, and a filtering assembly is arranged in the mounting assembly; the driving assembly is started to drive the guide structure to move bidirectionally, the guide structure can drive the adjusting structure to move bidirectionally, the air direction of the air supply outlet and the size of the air outlet can be adjusted through the adjusting structure, and therefore the purpose of air volume adjustment can be achieved.

The utility model discloses a cooling structure of a centrifugal water pump shaft seal, which belongs to the technical field of centrifugal water pumps and comprises a driving motor, a driving rod is fixedly mounted at the transmission end of the driving motor, a pump body is arranged on the right side of the driving motor, and a supporting seat is fixedly mounted at the lower ends of the driving motor and the pump body. The centrifugal water pump shaft seal cooling structure comprises a pump body, a driving motor is arranged on the pump body, an air inducing mechanism and an air making mechanism are arranged between the driving motor and the pump body, a flow guide ring is fixedly installed on an installation frame, and a transmission ring and a flow guide fan body are arranged on the inner side of the flow guide ring. The air making mechanism basically achieves the zero-energy-consumption heat dissipation and cooling effect by means of transmission force of a driving motor and a driving rod in the centrifugal water pump, the air making mechanism guides flow and circulates into air inducing grooves in a second air inducing plate in the air inducing mechanism, air enters the multiple sets of air inducing grooves at the same time, airflow in the air inducing grooves is accelerated, heat is taken away, then the sealing ring is rapidly cooled, and the service life of the sealing ring is prolonged. And the shaft seal body on the inner side of the sealing ring is quickly cooled.

The invention relates to the technical field of ovens, in particular to an exhaust pipeline of an oven and the oven, and aims to solve the problem that an existing oven is poor in heat dissipation effect. In order to achieve the purpose, the exhaust pipeline of the oven comprises a reducing pipe section, and the sectional area of the reducing pipe section is gradually reduced in the direction from the air inlet end to the exhaust end. On the basis of the fluid mechanics principle, a variable-diameter pipe section is designed in an exhaust pipeline, the sectional area of the variable-diameter pipe section is gradually reduced in the direction from the air inlet end to the exhaust end, a gradually-shrunk channel can be formed through the design, airflow acceleration is promoted, and the negative pressure effect is improved. When the sectional area is reduced, the flow speed is increased, so that the hot air flow in the pipeline can be discharged out of the exhaust pipeline more quickly, and the exhaust efficiency is improved.

The utility model relates to the field of film production discloses a film's air cooling device, including the conveyance case, the lateral wall of conveyance case is provided with the fan, the left end fixed connection of fan has the connecting pipe, the outer wall fixed connection of connecting pipe has the fixed pipe, the outer wall sliding connection of fixed pipe has the sleeve pipe, the fixed connection of sleeve pipe's end has the movable pipe, the top fixed connection of movable pipe has the sliding block, the inner wall of sliding block is provided with drive mechanism. In the utility model, through the conical groove structure of fan cooperation connecting pipe and movable pipe, can accelerate airflow, enhance air cooling efficiency, can effectively to the film on the conveyance belt rapid cooling. Simultaneously with the cooperation of bidirectional screw rod and sliding block, can adjust movable pipe position as needed, also can make its reciprocating movement, realize according to the flexible adjustment air cooling range of film width, ensure that large area film can also obtain uniform and efficient air cooling cooling.

This utility model discloses an ice maker, including a housing with a receiving cavity. The receiving cavity contains an ice chamber, a condenser, and a cooling fan. The housing has air inlets and outlets on both sides. An air guide shroud is also provided inside the receiving cavity, covering the ice chamber to form a heat dissipation channel between the shroud and the outer wall of the ice chamber. The two ends of the heat dissipation channel are connected to the air inlets and outlets, respectively. The condenser is located at the outlet end of the heat dissipation channel. This utility model, by covering the ice chamber with an air guide shroud to form a heat dissipation channel between the shroud and the ice chamber, increases the airflow velocity as it flows through the heat dissipation channel towards the outlet. By placing the condenser at the outlet end of the heat dissipation channel, the airflow exiting the channel passes through the condenser, thereby increasing the airflow through the condenser and rapidly cooling it, thus enhancing the heat dissipation effect.

The utility model relates to the technical field of soil remediation, and discloses a soil organic matter environment-friendly treatment device which comprises a conical box, a water tank is fixedly connected to the bottom of the outer side of the conical box, a heating disc is fixedly connected to the inner side of the water tank, and a water receiving ring is fixedly connected to the top of the inner wall of the conical box. The periphery of the bottom of the water receiving ring is communicated with a distillation tank, the bottom of the distillation tank penetrates through the conical box and is communicated with the water tank, the top of the conical box is fixedly connected with a top cover, the middle of the bottom end of the inner wall of the conical box is fixedly connected with a positioning cover, and the middle of the bottom end of the conical box is fixedly connected with a direct current motor. According to the utility model, through the matching among the direct current motor, the auger and the conical box, the mixing and heating effects can be enhanced, the recycling of water for distillation is realized, and through the matching among the auger, the fixing ring and the mixing blades, the soil mixing time can be further improved, and the processing time can be further shortened.

A heat exchanger system for an aircraft includes a nacelle having an inlet and an outlet, a nacelle heat exchanger located within the nacelle, and a fan system located within the nacelle. Air flows into the engine compartment through the inlet and out of the engine compartment through the outlet. The nacelle heat exchanger is configured to transfer heat from the coolant to the nacelle heat exchanger using air in the airflow. The fan system is configured to increase airflow to the nacelle heat exchanger.

The utility model relates to an impeller dust suction device which comprises a cabinet with universal wheels at the bottom, a first partition plate and a second partition plate which are arranged up and down are fixed in the cabinet, the cabinet is sequentially divided into a first cavity, a second cavity and a third cavity from top to bottom, the second cavity is respectively communicated with the first cavity and the third cavity, and the third cavity is communicated with the first cavity and the third cavity. A vertically-through frame is fixed in the first cavity, a filter screen is arranged at the bottom in the frame, a collecting cavity is formed between the upper surface of the filter screen and the inner walls of the four sides of the frame and used for collecting dust, and a flow inlet mechanism communicated with the first cavity is arranged on the cabinet. The impeller rotates to generate suction force, and the impeller is designed to optimize the shape, size and arrangement of the blades according to the fluid mechanics principle, so that turbulent flow and noise in airflow are reduced, the mute effect is good, meanwhile, efficient airflow can be kept, the dust collection effect is improved, the overall structural layout is optimized, the whole equipment tends to be miniaturized, and the equipment is more compact. The occupied space of equipment is reduced, and workshop layout is facilitated.

This utility model relates to the field of wheat processing technology and discloses a high-efficiency wheat washing and screening device, including a casing. An impurity discharge hole is provided on one side of the casing. A third fixing plate is fixedly connected to the upper outer side of the casing. A screening mechanism is provided on the top of the third fixing plate. An air duct box is provided on the side of the casing away from the impurity discharge hole. A first optical axis is provided inside the air duct box. An isolation plate is rotatably connected to the outer wall of the first optical axis. A second optical axis is rotatably connected to the side of the isolation plate away from the air duct box. An adjusting strip is rotatably connected to the outer wall of the second optical axis. In this utility model, airflow is generated by a blower mechanism and transported into the casing through the air duct box. The adjusting strip allows for upward adjustment, thus solving the problems of poor purification effect and increased raw material loss in traditional wheat washing and screening devices.

The invention belongs to the technical field of dustproof devices, and particularly relates to a dustproof device for a substation equipment box, which is characterized in that the dustproof device comprises a box body, a first cover plate is rotatably connected to the outer wall of one side of the box body, a treatment box is fixedly connected to the bottom of the box body, and a bottom box is fixedly connected to the bottom of the treatment box; the bottom of the bottom box is fixedly connected with a first transfer box, and the bottom of the first transfer box is fixedly connected with a motor. The purification treatment mechanism arranged in the bottom box can further filter and purify the dedusted gas, and the condensation drying mechanism arranged in the bottom box can dry the gas, so that the subsequent influence on the safety of equipment in the box body is avoided; the electrostatic dust removal mechanism arranged on the inner wall of the treatment box can be used for conducting final dust removal treatment on dust through an electrostatic field, airflow can be rotationally and evenly guided into the box body through the rotary ventilation mechanism arranged in the box, and the purposes of efficient dust removal, ventilation and heat dissipation are achieved.

The present invention provides a cigarette rejection device for a splicing drum of a cigarette making machine, which comprises an air blowing block, an electromagnetic valve, a controller, and an air supply device, wherein the air blowing block is provided with a first protrusion and a second protrusion opposite to each other; the first protrusion is provided with a first air blowing hole, and the second protrusion is provided with a second air blowing hole; the first air blowing hole and the second air blowing hole are connected to two air suction holes one by one; the air blowing block is provided with a connecting hole connecting the first air blowing hole and the second air blowing hole; one end of the electromagnetic valve is connected to the air supply device, and the other end of the electromagnetic valve is connected to a first pipeline and a second pipeline, and the first pipeline and the second pipeline are connected to the connecting hole respectively; a round block is provided in the second pipeline, and a vent hole coaxial with the second pipeline is provided on the round block; the controller is used to be electrically connected to the V-valve opening and closing control system of the cigarette making machine, and the electromagnetic valve is electrically connected to the controller. The present invention can better reject cigarettes at the splicing drum when the cigarette making machine is started and stopped.

This invention provides a rear-mounted guide vane with a cylindrical body for an axial flow fan, belonging to the field of ventilation equipment technology. It solves the problems of insufficient airflow or low static pressure efficiency in the high static pressure zone in existing technologies. This invention includes a guide vane body, guide vane blades, and a central hub. The two sides of the guide vane body are the outlet side and the inlet side, respectively, with the diameter of the outlet side being larger than that of the inlet side. The guide vane body is integrally formed and has a conical ring shape. The inner wall of the guide vane body forms a first mounting surface, which is a conical ring structure. The central hub is ring-shaped, and several mounting protrusions are formed on one side of the central hub. The outer surface of the central hub and the mounting protrusions forms a second mounting surface. The guide vane blades are numerous and arranged in a circumferential array, fixed between the first and second mounting surfaces. The cross-section of the guide vane blades is a thin plate structure of uniform thickness with an arc shape. This invention has the advantages of reducing turbulence, increasing airflow in the high static pressure zone, high static pressure efficiency, and increased range.

The invention relates to the field of transformers, in particular to an adjustable transformer with a moisture-proof function, which comprises a shell, fins and the like, and a plurality of fins are arranged on the shell. According to the invention, after the adjusting cover is unfolded, a worker can place a carried tool on the adjusting cover, so that the worker does not need to hold the tool all the time when maintaining the high-voltage terminal, the hands of the worker can be released to maintain the high-voltage terminal, and the convenience of the worker in maintaining the high-voltage terminal is improved; after the adjusting covers are unfolded, the adjusting covers are located above the fins on the front side and the rear side respectively, a worker can stand on the front side and the rear side of the shell to maintain the high-voltage terminal, the unfolded adjusting covers can block and bear small parts or bolts, and the situation that the worker difficultly takes out the small parts or the bolts due to the fact that the small parts or the bolts fall and are clamped between the fins is avoided; and meanwhile, pedestrians can be prevented from being injured by small parts or bolts.