71results about How to "Guaranteed operating temperature" patented technology

The invention discloses a method for continuous pyrolysis and gasification of a material. The method comprises the following steps: 1, a raw material and a catalyst enter a microwave pyrolysis and gasification system, fall to a first-stage rotating disc of a microwave reaction chamber, and sequentially undergo drying, activating and pyrolysis treatment with rotating; 2, a pyrolysis treated material falls to a second-stage rotating disc of the microwave reaction chamber, and the pyrolysis treated material and a pyrolysis volatile compound undergo a gasification and reforming reaction under the action of water vapor; and 3, a solid product obtained in step 2 falls to a residue storage tank below the microwave reaction chamber from middle holes of the second-stage rotating disc through a second-stage pushing baffle plate, and is discharged from a reaction system under stirring and screw dual action, and a gas product enters a settlement chamber from an annular sieve plate at the bottom of the microwave reaction chamber, and undergoes settlement treatment to obtain the gasification product. The method has the advantages of fast cracking speed, high gasification efficiency, high quality of the gas product, meeting of liquid fuel synthesis requirements, and good application prospect.

The invention discloses an ice preventing and removing system for a fan blade. The ice preventing and removing system comprises an air-heating ice preventing device, an expansion pipe ice removing device, an electric heating ice removing device, a layer ice removing device and a monitoring control device. The air-heating ice preventing device comprises a condenser, an air sending pipeline and an air guiding pipeline; the air sending pipeline is connected with the condenser and is used for sending hot exhaust air of the condenser into a fan hub and an engine cabin; and the air guiding pipelineis arranged at the fan hub and is used for guiding the hot air at the fan hub into the fan blade. The expansion pipe ice removing device comprises a plurality of expansion pipes which are distributedon the fan blade and are connected in parallel with one another. The electric heating ice removing device comprises a plurality of resistor wires which are distributed on the fan blade and are connected in parallel with one another. The layer ice removing device comprises a hydrophobic coating which is arranged on the fan blade. The monitoring control device comprises an ice prevention and removalcontrol module, an acceleration sensor, a temperature sensor and an optical fiber sensor, wherein the acceleration sensor, the emperature sensor and the optical fiber sensor are electrically connected with the ice prevention and removal control module. The system disclosed by the invention is high in energy utilization rate and ideal in accumulated ice removal effect.

The invention discloses a passive-driven micro-channel heat-sink cooling device which is used for a high-power microelectronic device or an LED lamp. The passive-driven micro-channel heat-sink cooling device comprises a copper plate piece micro-channel array heat sink, copper capillary tubes and a liquid filling opening. The two ends of each micro-channel in the copper plate piece heat sink respectively comprise a stair-shaped sudden expansion which is used for being directly connected with the outside capillary tubes in a plug-pull mode, and the sudden expansions and the capillary tubes are sealed in a cementing mode or a silver soldering mode. The copper plate piece heat sink and the capillary tubes are connected to form a three-dimensional space structure which can be filled with a certain volume of liquid working media, the liquid working media in the heat-sink micro-channels can generate phase transition and sharp oscillation motion in a heating state, heat is transmitted to the capillary tubes from endothermic working media in the heat sink, heat is dissipated to surroundings through free convection or fan forced convection on the sides of the capillary tubes, and therefore the purpose of heat-sink cooling of a heating device connected with the heat sink is achieved. The passive-driven micro-channel heat-sink cooling device has the advantages of being compact in structure, low in manufacturing cost, free of addition of auxiliary devices and capable of stably operating for a long time.

The invention provides an automatic dust removing device for a cooler for a forced oil circulation power transformer and a dust removing method of the automatic dust removing device for the cooler for the forced oil circulation power transformer and belongs to the field of automatic dust removing equipment for coolers for forced oil circulation power transformers. The automatic dust removing device for the cooler for the forced oil circulation power transformer comprises the forced oil circulation power transformer and the cooler for the forced oil circulation power transformer and is provided with a controller, a phase changing device, a voltage transformer and a current transformer. The signal output end of the controller is connected to the signal input end of the phase changing device, the three-phase input end of the phase changing device is connected to the low-voltage wire outlet end of the forced oil circulation power transformer through the voltage transformer and the current transformer respectively, the cooler for the forced oil circulation power transformer is provided with a fan driven by a motor, and the three-phase output end of the phase changing device is connected to the power source input end of the motor. Dust and sundries on a fin tube of the cooler for the forced oil circulation power transformer can be effectively cleaned, the heat dissipation efficiency of the cooler for the forced oil circulation power transformer is improved, the maintenance workload is relieved, the operation temperature of the power transformer is reduced, and the expected service life of the power transformer is achieved.

The invention discloses an air-cooling type screw air compressor automatic purging device and a control device thereof, and belongs to the technical field of compressor equipment. The air-cooling typescrew air compressor automatic purging device comprises a cooler body and further comprises an installation box, a box panel, a cleaning assembly and a dust removal assembly. The cooler body is arranged in the installation box. The box panel is arranged in the rear of the installation box. The dust removal assembly is arranged in the installation box. The cleaning assembly comprises a dust removal part, a lifting part and an air injection part. The dust removal part is arranged beside the cooler body. The lifting part is arranged in the installation box. The air injection part is arranged onthe lifting part. The output end of the air injection part is arranged facing the cooler body. A control unit is arranged in the installation box. According to the air-cooling type screw air compressor automatic purging device and the control device thereof, after dust is removed, it can be guaranteed that no dust exists in the cooler body so that it can be guaranteed that the cooler body does nothave the problem of insufficient heat exchange capacity because of accumulated dust, and then it is guaranteed that the operating temperature of the air-cooling type screw air compressor is within the range with safety and high efficiency.

The invention discloses an electromagnetic pump cooling system and a control method thereof. The system comprises an electromagnetic pump, an oil-water heat exchanger, an oil tank, a flow meter, a cooling water pump, a cooling water tank, a cooling water tower, a cooling tower fan and a cooling oil pump, wherein the oil-water heat exchanger is connected with the oil tank, the oil tank is connected with the electromagnetic pump through the cooling oil pump, and the electromagnetic pump is connected with the oil-water heat exchanger. The system has the advantages that: the coil of the electromagnetic pump is directly cooled by adopting cooling oil, so the possibility that air and water are in contact with molten metal is avoided; meanwhile, the cooling oil has strong cooling capability, andcan ensure the operating temperature of the coil; control of oil temperature is realized by collocating the cooling tower and using cooling water through the oil-water heat exchanger, so that the cooling capability of the whole system is further ensured; because of a complete monitoring system and a control system, relatively high automation can be realized; and by chain setting of each level, operating accidents of the electromagnetic pump due to error operation of operators are avoided.

The invention relates to a heat dissipation and dust removal device for electromechanical equipment. The head dissipation and dust removal device comprises a shell, heat dissipation units, a heat conducting unit and a dust removal unit; a horizontally-arranged hollow installation plate is fixedly installed in the middle of the shell, two side plates are fixed to the top of the installation plate,and the side plates, the installation plate and the shell jointly form a space for containing the electromechanical equipment; the heat dissipation units comprises first heat dissipation units arranged on the side plates and second heat dissipation units fixedly arranged at the bottom of the installation plate; the heat conducting unit is cyclically arranged on the upper portion of the shell, andcooling liquid cyclically flows in the heat conducting unit; the dust removal unit comprises a dust removal net, a detachable sweeping unit for sweeping dust accumulated on the dust removal net and adust suction unit for sucking dust. Compared with the prior art, by means of the heat dissipation and dust removal device, the electromechanical equipment can achieve the advantages of being good in dust removal and heat dissipation effect and the like.

The invention discloses an automobile maintenance lifting machine directly driven by a frameless combined permanent magnet synchronous linear motor. The lifting machine comprises a platform seat and four lifting mechanisms rectangularly arranged on the platform seat; each lifting mechanism comprises a guide stand column, a screw and a load bearing bracket, the screw is installed in the guide standcolumn through a bearing, the load bearing bracket provided with a structure matched with a thread with the screw sleeves the screw and moves up and down along the guide stand column, and the lower end of the screw is provided with a chain wheel; the four lifting mechanisms are subjected to transmission through the chain wheels; and the screw of at least one of the four lifting mechanism is directly driven by the frameless permanent magnet synchronous motor. The automobile maintenance lifting machine directly driven by the frameless combined permanent magnet synchronous linear motor is simplein structure, high in efficiency and low in noise.

The invention relates to a bismaleimide prepolymer and a preparation method. The material has the following structure formula shown in the description. The preparation method comprises the following steps of under the nitrogen gas protection, 3,4'-diaminodiphenyl ether are dissolved in an organic solvent; after complete dissolution, 2,3,3',4'-biphenyl tetracarboxylic dianhydride or 2,3,3',4'-diphenyl ether tetracarboxylic acid dianhydride are added; meanwhile, the organic solvent is added so that the solid content of the solution is 5 to 50 percent; room temperature reaction is performed; an end-capping reagent of maleic anhydride is added; reaction is continuously performed; then, dewatering agents and catalysts are added drip by drip; reaction, washing, drying and crushing are performedto obtain the bismaleimide prepolymer. The prepared bismaleimide material has good comprehensive performance; before crosslinking, the high dissolution degree, low vitrification conversion temperatureand higher temperature processing window are realized; after the heating curing, good temperature resistant performance is realized. The material can be prepared into films, high-performance resin-based composite materials and high-temperature-resistant structure bonding agents and the like, the bismaleimide prepolymer can be applied to the fields of aerospace, printed circuit boards, semiconductor encapsulation and the like.

The invention provides a micro-module data center used for solving the problem that an existing data center micro-module needs external circulation heat dissipation, and is low in refrigeration efficiency, large in occupied area and difficult to assemble; the micro-module data center disclosed in the invention comprises a comprehensive cabinet and at least one set of IT equipment cabinet; the comprehensive cabinet comprises a cabinet body with a containing cavity, a power supply assembly, a monitoring alarm assembly and an air conditioner; a front door body is arranged on the front side of the cabinet body, and a rear door body is arranged on the rear side of the cabinet body; a closed space is defined by the cabinet body, the front door body and rear door body; the air conditioner is arranged at the bottom of the containing cavity; a cold air channel is formed between the air conditioner and the front door body, and a hot air channel is formed between the air conditioner and the rear door body; the air conditioner can draw cold air from the air conditioner to the cold air channel, and can draw the hot air from the hot air channel to the air conditioner; and according to the micro-module data center, the isolation design of closing the cold and hot channels is adopted, so that gas mixing is avoided, the return air temperature is greatly improved, the refrigeration efficiency is improved while the PUE is reduced, the space is saved, and the rapid arrangement, the visual display and the intelligent management are achieved.

The invention discloses intelligent pouring type asphalt concrete stirring equipment and method. The equipment comprises a chassis, a housing fixed on the chassis, a stirring tank fixed in the housing, a stirring shaft passing through the stirring tank, a stirring shaft driving device, a heating device, a PLC, an engine adjusting circuit and a feeding gate openness sensor, wherein the PLC controls the apparatus elements to intelligently control comprehensive maintenance equipment, so that the work efficiency is effectively improved, the engineering cost is lowered, and the equipment and the method have important meaning on current large-scale municipal construction.

The invention discloses a low-cost consumable molten iron desulphurization mixer and a preparation method thereof. The mixer comprises a mixing shaft, and a connecting flange arranged above the mixing shaft, wherein the mixing shaft consists of an internal gas cooling pipe and an external composite mixing shaft core from inside to outside; a plurality of mixing blades are arranged at the lower end of the mixing shaft; and refractory material working liners are applied on the outermost layers of the mixing shaft and the mixing blades. The method comprises the following steps: firstly, a mixing shaft frame and blade frames are prepared; V-shaped anchoring pieces are welded on the metal surfaces of the mixing shaft frame and the blade frames to prepare the composite mixing core; and thermal insulation buffer layers and refractory casting layers cover the metal surfaces of the mixing shaft frame and the blade frames in sequence to obtain the mixer. The comprehensive production cost of the mixer is largely reduced; the recycling value of the mixer after use is largely reduced; the long-distance transporting recovery of the mixer after use and the special recovering utilization of the mixing core are prevented; and the purposes of low cost and consumption of the mixer are achieved.

The invention discloses a continuous material pyrolysis gasification device which comprises a spiral feeder, a microwave reaction cavity, a microwave generator, a first-stage rotating disc, a second-stage rotating disc, a hollow rotating shaft, a screening plate, a settling chamber, a residue storage tank and a spiral residue discharge device, wherein the spiral feeder is positioned at the upper part of the microwave reaction cavity; the microwave generator is arranged outside the microwave reaction cavity; the first-stage rotating disc and the second-stage rotating disc are arranged inside the microwave reaction cavity; the two stages of rotating discs are fixed through the hollow rotating shaft; the bottom of the microwave reaction cavity takes the shape of a ring and consists of a screening plate which tilts downwards; the settling chamber is connected below the screening plate; a gas product outlet is formed in the settling chamber; a non-screening plate part at the bottom of the microwave reaction cavity communicates with the residue storage tank below; and the residue storage tank is internally provided with a stirrer and communicates with the spiral residue discharge device. The continuous material pyrolysis gasification device is high in pyrolysis speed, high in gasification efficiency, high in gas product quality, capable of meeting requirements of synthesizing liquid fuel, and good in application prospect.

The invention discloses a system and a method for multi-media ecological treatment of rural domestic sewage in cold and arid regions. The system comprises a sewage regulating and deoiling unit (1), a multi-media soil layer system low temperature-resistant strengthening treatment unit (2), a subsurface-surface flow wetland gradient treatment unit (3), a water resource regulation and storage unit (4), a ferment recycling unit (5) and a wind-solar complementary micro-power and heat supply unit (6); the sewage regulating and deoiling unit is sequentially connected with the multi-media soil layer system low temperature-resistant strengthening treatment unit, the subsurface-surface flow wetland gradient treatment unit and the water resource regulation and storage unit; the wind-solar complementary micro-power and heat supply unit is respectively connected with the sewage regulating and deoiling unit and the multi-media soil layer system low temperature-resistant strengthening treatment unit; and the ferment recycling unit is respectively connected with the sewage regulating and deoiling unit, the multi-media soil layer system low temperature-resistant strengthening treatment unit and the subsurface-surface flow wetland gradient treatment unit.

The invention discloses a square power battery heat management structure. The square power battery heat management structure comprises first side plates, second side plates, a top plate, a PTC heater and heat dissipation units, the two first side plates are arranged at the front side and the rear side of a battery pack in a mutual parallel manner, the two second side plates are respectively fixedly connected to the left sides and the right sides of the two first side plates through screws, the top plate is fixed to the upper ends of the two first side plates through screws, the PTC heater is fixed to the lower ends of the two first side plates through screws, and the heat dissipation units are fixed to the sidewalls of the first side plates; The sidewall heat dissipation units are used for dissipating heat, the bottom PTC heater is used for heating, the heat dissipation units are started when the temperature is too high, and the bottom PTC heater is started to heat when the structure is in a high-cold region in order to keep the normal use temperature of batteries.

The invention relates to a liquid-cooled laser light-emitting device and a making method thereof. The device comprises a base, a lens, a fluorescent converter and an LD luminescent light source; the base comprises a substrate, a cavity with an opening formed in the top is fixedly formed in the top of the substrate, and a liquid inlet and a liquid outlet are formed in the two opposite ends of the side face of the cavity; the lens is sealingly stuck to the top of the cavity; the fluorescent converter is fixedly arranged on the substrate located in the cavity through a fluorescent material support body; a circuit of the LD luminescent light source is fixedly connected between the fluorescent converter and the substrate. Accordingly, lots of heat generated by work of the LD luminescent light source is directly transferred into liquid through a circuit board and a pin, the liquid actively brings the heat away, the use temperature of the LD luminescent light source is guaranteed, good heat conduction and heat dissipation capacity is achieved, the light emitting efficiency is effectively improved, the service life is effectively prolonged, the radiator size is lowered largely under the same power, high-power laser light emitting can be achieved on a small-area light source, the luminous efficiency is good, the weight is low, the cost is low, and LD laser illumination is achieved.

The invention relates to a convection and fully-cooled type end cover structure for a novel roots pump. The convection and fully-cooled type end cover structure comprises an end cover body and is characterized in that the end cover body is in shape of a geometrical octagon; inner end cover cooling grooves which are annually distributed are formed in the inner surface of the end cover body; outer end cover cooling grooves which are also annularly distributed are formed in the inner surface, on the outer side of each inner end cover cooling groove, of the end cover body; and two symmetrically-distributed vacuum sealing grooves are formed in the inner surface, on the inner side of each inner end cover cooling groove, of the end cover body. According to the convection and fully-cooled type end cover structure for the novel roots pump, a roots pump body is high in strength and rigidity due to the end cover in shape of the geometrical octagon; two independent cooling chamber layers are formed, thereby two independent cooling falling lines can be formed by the cooling liquid, and a convection mode can be formed as well; the convection and fully-cooled type end cover structure can be used in match with a novel jacketed type fully-cooled roots pump, therefore, sufficient cooling liquid can be provided for dissipating the heat generated by the roots pump in running, and as a result, the potential risk that a rotor is heated and expanded to result in locking as the roots pump is overheat can be completely solved, and lubricating oil in a shaft chamber of the end cover can be kept at a certain temperature for running.

The invention belongs to the field of chemical machines, and relates to a combined glue spray opening. The combined glue spray opening is mounted on a pot body of a condensation pot and comprises a glue spray set pipe and a secondary seam pipe. The glue spray set pipe is mounted on the periphery of the secondary steam pipe in a sleeving pipe, the glue spray set pipe and the secondary steam pipe are arranged obliquely, and an opening of the glue spray opening faces the oblique lower portion. The secondary steam pipe comprises a steam connecting flange and a steam pipe, the steam connecting flange is fixed to an inlet at the top end of the steam pipe, and a mounting blind flange is arranged on the upper portion of the steam pipe. The glue spray set pipe comprises a mounting flange and a gluespray pipe. The mounting flange is fixed to the top end of the glue spray pipe, a connecting pipe is arranged on the glue spray pipe to be connected with a glue inlet flange, and the mounting flangeand the mounting blind flange are fixedly connected. By means of the combined glue spray opening, secondary steam and glue can enter the condensation pot at the same time, the quantity of secondary steam can be reduced, it is guaranteed that the operation temperature of the condensation pot keeps at the proper level, the content of steam in gas exhausted from the condensation pot is reduced, the quantity of circulating cooling water is reduced, and the aims of energy saving and consumption reduction are achieved.

The invention discloses a moistureproof and cold-proof electronic mouse repeller comprising a micro processing module, a signal acquisition module, an A / D conversion module, a first communication module, a second communication module, a control input module, an alarm transmission module, an adjusting module and a functional module. The signal acquisition module is connected to the A / D conversion module. Collected data is converted into digital signals by the A / D conversion module. The A / D conversion module is connected to the micro processing module through the first communication module. The micro processing module is connected to the adjusting module through the second communication module. The micro processing module is also connected to the control input module, the alarm transmission module and the functional module.The operating temperature of the electronic mouse repeller is guaranteed. A humidity problem of the electronic mouse repeller during outdoor use is solved. Proper functioning of electronic components of the electronic mouse repeller is guaranteed. Service life is prolonged and range of application of the electronic mouse repeller is expanded.

The invention discloses a novel vacuum pump. The novel vacuum pump comprises a shell (1); an output shaft (2) is arranged on one side of the shell (1); an air inlet (4) and an air outlet (5) are formed in the upper end of the shell (1); an inlet air filtering device (7) is arranged between the air inlet (4) and the shell (1); an outlet air filtering device (9) is arranged between the air outlet (5) and the shell (1); cooling fins (3) are arranged on the two sides of the shell (1); two symmetrical clamping bases (11) are arranged on the same side of the shell (1) and are fixedly connected with the shell (1); clamping grooves (12) are formed between the clamping bases (11) and the shell (1); clamping blocks (13) are arranged on the two sides of the cooling fins (3) and are matched with the clamping grooves (12). The novel vacuum pump is compact in structure and a pump body can be effectively cooled.

The invention provides a preparation method of a clay quartz crucible for high-temperature alloy casting. The preparation method comprises the following steps: preparing pug, refining the pug, molding, drying and sintering. The pug comprises a basic material and water, and the basic material comprises the following components in percentage by mass: 25-30% of ball clay powder; 40-50% of quartz glass powder; 20-25% of white corundum powder; and 1%-5% of mullite powder. According to the clay quartz crucible, the raw material variety, the adding proportion and the raw material granularity are reasonably controlled; the adverse effect of clay on the thermal stability of the crucible is avoided, the problem that a pure quartz crucible cannot be plastically formed is solved, the requirements of high-temperature alloy on the use temperature and thermal shock resistance of the crucible are met, meanwhile, the sintering temperature of the crucible is 500 DEG C lower than that of a traditional magnesium crucible, and the sintering condition is easier to meet.

The invention discloses a shock-absorption protection device for building electromechanical equipment. The device comprises an equipment shell in the shape of a hollow rectangular column, wherein thebottom end of the equipment shell is connected with a shock absorption component, the inner bottom end of the equipment shell is fixedly connected with a rotary motor, the output shaft of the rotary motor is fixedly connected to rotating blades, a number of air outlets are provided on the top of the equipment shell, and an air outlet control component for controlling the open state of the air outlet is arranged on the outside of the air outlet; the side of the equipment shell is provided with an air inlet, and the inner side of the air inlet is provided with an air intake control component forcontrolling the opening state of the air inlet; an inflatable airbag is provided on the outer side of the equipment shell, the air inflatable air bag is fixedly connected to the outer side of the equipment shell, and the inflatable airbag is communicated with the air inlet.

The invention relates to the technical field of high-and-low voltage switchgear and provides a closed high-and-low voltage power distribution cabinet suitable for multiple places. The invention aims to overcome the problem that heat generated by operation of electrical elements installed inside a traditional high-and-low voltage power distribution cabinet with a sealing function cannot be dissipated in time and thus easily causes aging of electrical elements in the cabinet body and burnout of the electrical elements due to high temperature in the cabinet body. The power distribution cabinet ofthe invention comprises a power distribution cabinet body and a base, wherein a top cabinet is mounted at the upper end of the power distribution cabinet body; a back plate is vertically installed onthe rear portion of an inner cavity of the power distribution cabinet body; the back plate divides the inner cavity of the power distribution cabinet body into an element cavity located on the frontside and a cooling cavity located on the rear side; a horizontal partition plate used for partitioning a liquid cavity out at the lower portion of the inner cavity of the element cavity is installed on the lower portion of the element cavity; and a cooling and heat dissipation system is arranged in the element cavity. The power distribution cabinet can be applied to multiple places, and has high social use value and application prospect.

The invention relates to a deformed high-temperature alloy and a manufacturing method thereof, and relates to the technical field of metal structure materials. According to the mainly adopted technical scheme, the deformed high-temperature alloy comprises the following components in percentage by weight: 20-35% of Co, 8-11% of Cr, 5.2-6% of Ti, 1.8-4.0% of Al, 4-6% of W, 2-4% of Mo, 0-4% of Ta, less than 0.05% of C, less than 0.1% of Zr and the balance of Ni. The stacking fault energy of the deformed high-temperature alloy is less than 33mJ / m < 2 >; and the volume fraction of the strengtheningphase gamma' in the deformed high-temperature alloy is 40-48%. The invention is mainly used for designing the deformed high-temperature alloy which has excellent strength at a use temperature and hasgood plasticity in a hot working temperature interval; and the deformed high-temperature alloy is mainly suitable for parts used under high temperature and high stress, such as turbine discs of aero-engines.

The invention relates to a compact closed type pressurized hydraulic system profile extruding machine. The compact closed type pressurized hydraulic system profile extruding machine comprises a fixedbase, an extrusion part, an oil supply part and a main electric cabinet, wherein the extrusion part, the oil supply part and the main electric cabinet are arranged on the fixed base, the oil supply part comprises a pressurized oil cylinder, an oil way plate, a cooling mechanism, a motor pump set, a hydraulic loop and a liquid filling valve, the pressurized oil cylinder is composed of an oil storage cylinder barrel and a pressurization cylinder, the oil way plate is a control assembly of all the oil cylinders of the extruding machine, the cooling mechanism is used for cooling hydraulic oil, themotor pump set is used for generating high-pressure system pressure of the hydraulic oil when the extruding machine works, the hydraulic loop comprises a pump oil suction pipe, an oil delivery pipe I, an oil delivery pipe II, a working oil pipe I, a working oil pipe II and an oil return pipe, and the liquid filling valve is arranged on the main oil cylinder and communicates with the oil storage cylinder barrel. According to the compact closed type pressurized hydraulic system profile extruding machine, when the extruding machine is used, the use amount of the hydraulic oil is small, the temperature of the hydraulic oil can be effectively controlled during working, the service life of the hydraulic oil is effectively prolonged, and the use cost of equipment is also saved.

The invention discloses a portable gardening special fan which comprises a vehicle, a shell obliquely arranged on the vehicle, a second chamber, a transition section, a first chamber, a plurality of air inlets, a motor, a wind wheel and a wind guide ring. The second chamber, the transition section and the first chamber are formed from one end of the shell to the other end of the shell. The air inlets are evenly distributed on the end face of the other end of the shell in an annular shape. The motor and the wind wheel are coaxially arranged in the second chamber. The wind guide ring is an annular plate and is in an arc shape in the radial direction, and an arc opening faces the first chamber. The large ring end of the wind guide ring is fixedly arranged on the side wall close to the other end of the shell, the small ring end of the wind guide ring is arranged by extending towards the tail end of the motor, and the radial length of the wind guide ring is smaller than one sixth of the cross section diameter of the second chamber. By adoption of the portable gardening special fan, fallen leaves can be rapidly collected, labor intensity is relieved, and during use of the portable gardening special fan, a motor of an axial flow fan is synchronously cooled in real time, and the service life of the axial flow fan is prolonged.

The invention relates to a fluorescent liquid laser light-emitting device and a manufacturing method thereof. The fluorescent liquid laser light-emitting device is characterized by comprising a main cavity, a stirring pump, a lens, a circuit board, LD excitation light-emitting light sources and a liquid fluorescent material; the main cavity comprises a base; a cylindrical cavity body with an upward opening is fixedly arranged at the top of the base; the top of the cavity body hermetically adheres to the lens; a liquid inlet and a liquid outlet are formed in the two opposite ends of the side surface of the cavity body and are connected to the two ends of a fluorescent liquid guide pipe respectively; the stirring pump is connected to the fluorescent liquid guide pipe; a fluorescent liquid injection port is formed in the stirring pump; the circuit board is fixedly arranged at the top of a base plate inside the cylindrical cavity body through circuit board supporting columns; the top of the circuit board is fixedly welded to the LD excitation light-emitting light sources and communicates with the LD excitation light-emitting light sources; and the liquid fluorescent material fills theinteriors of the cylindrical cavity body and the fluorescent liquid guide pipe. The fluorescent liquid laser light-emitting device and the manufacturing method thereof can be widely applied to the field of light emitting devices.

The invention discloses a novel butt joint structure of a conductive slide ring, and belongs to the technical field of electromechanical devices. The novel butt joint structure solves the problems ofburning out of a pin fixing base, inaccurate positioning of a rotating butt joint part and mis-inserting of male and female pins during the field use of the sliding ring in high temperature environment. The novel butt joint structure includes a female pin socket assembly and a male pin plug assembly connected to the female pin socket assembly. The female pin socket assembly includes a female pin bearing mounting seat, a female pin mounting seat assembly, female pin sleeves, shoulder screws and female pin assemblies. The male pin plug assembly includes a male pin fixing seat, a male pin mounting seat assembly, male pin sleeves and male pin assemblies. Positioning columns for positioning with the male pin assemblies are arranged on the female pin bearing mounting seat. Positioning grooves for matching the positioning columns are arranged in the male pin fixing seat. The female bearing mounting seat is connected to the male pin fixing seat through the cooperation of the positioning columns and the positioning grooves. The male pin assemblies are inserted into the female pin assemblies through the cooperation of the positioning columns and the positioning grooves.