539results about How to "Guarantee the stability of use" patented technology

The invention belongs to the non-ferrous metallurgy field and discloses a method and an electrolytic tank for producing metal titanium through directive electrolysis of titanium dioxide. According to the method, titanium dioxide powder serves as a raw material, liquid metal sodium serves as a cathode reduction medium, the titanium dioxide powder enters the cathode of the metal sodium continuously for a reduction reaction under a joint action of a spirally feeding mode and argon flow serving as a carrier gas, and an electrolytic product is highly purified sponge titanium powder; and oxygen ions are released during the electrolytic process, enter KC1-NaC1 binary mixed molten salt through a stable zirconia solid oxygen permeable membrane of yttrium oxide under the effect of an electric field, transfer to a graphite anode for an electrochemical reaction, and then are discharged. The producing process is capable of producing the metal titanium through direct and rapid reduction of the titanium dioxide powder and producing continuously, high in current efficiency and deoxidation efficiency, strong in regeneration capacity of a reducing agent, simple and suitable for industrial applications.

An embodiment of the present invention relates to a refrigerator comprising: a refrigerator body in which an upper storage space and a lower storage space are formed; a door part for opening and closing the lower storage space; a drawer unit which is disposed so as to be able to be introduced into or extracted from the lower storage space and in which a storage space for storing articles is formed; a driving device that is arranged on the inner side of the door part; a lifting device that is arranged on the inner side of the drawer unit, is formed in a crossed structure and is used for liftingthe stored objects; a connecting assembly that is connected with the driving device on the back face of the door part, connected with the lifting device through the front surface of the drawer unit and used for transmitting power for lifting of the lifting device, and the lifting device is installed to be capable of being detached from the drawer unit or installed on the drawer unit when being separated from the connecting assembly; the lifting device comprises a limiting device, and the limiting device keeps a limiting state when the lifting device is separated, so that the lifting device cannot be unfolded.

The invention discloses a coupled hydrogen-rich fuel reformation hydrogen making system, in particular to an efficient heat transfer coupled hydrogen-rich fuel reformation hydrogen making system. The system comprises a heat supply unit, a CO purification and elimination unit and a coupling reformation reactor; wherein, the inside of the coupling reformation reactor has a plate-fin structure, comprising a heat transfer zone and a heat transfer reaction zone; raw material finned pipelines are through the heat transfer zone and the heat transfer reaction zone; the outlet of the raw material finned pipelines are communicated with the inlet of the CO purification and elimination unit; the outlet of the CO purification and elimination unit is communicated with the hydrogen inlet of a fuel cell by a heat exchanger; the heat supply unit supplying heat using the heat provided from the combustion between a hydrogen-rich fuel and air or oxygen is communicated with the inlet of the heat transfer zone of the coupling reformation reactor and the outlet of the heat transfer zone is communicated with the inlet of the heat transfer reaction zone. The invention has reasonable structure, safe heat transfer, compact system, good control to the temperature of the catalytic reaction unit, flexible adjustment, high energy utilization efficiency and stable and reliable system.

The invention discloses a liquid metal heat conducting material and belongs to the field of heat conducting material. The liquid metal heat conducting material comprises liquid metal alloy and antimony, and the antimony accounts for two to eight parts by weight. The liquid metal heat conducting material has the characteristics that a protective film can be formed on the surface of liquid metal, oxidation rate of liquid metal heat conducting pieces is slowed down, heat conductivity is high, and performances are greatly superior to silica gel heat conducting pieces.

The invention discloses a semi-active control hydraulic suspension for an automobile powertrain. The semi-active control hydraulic suspension comprises a suspended shell; an upper liquid chamber communicates with a lower liquid chamber through the inertia channel on an inertia channel body; an air cavity that is a sealed cavity is positioned between a decoupling membrane and the inertia channel; the inertia channel body is provided with an opening communicating with the air cavity; the inner wall of the opening takes the shape of a circular truncated cone; the diameter of the inner wall of the lower end of the opening is more than that of the upper end of the opening; a rubber base membrane is provided with a through hole; one end of the through hole only communicates with the opening while the other end of the through hole communicates with a bottom bowl; a stopper matched with the opening for sealing is arranged in the through hole; and a driving mechanism for controlling the stopper to move axially along the opening is arranged in the bottom bowl. Compared with the prior art, the semi-active control hydraulic suspension for the automobile powertrain has the characteristics of good stability in use, long service life, wide absorbable vibration frequency band, being capable of effectively reducing vibration and noise in an automobile in various driving conditions, and thereby enabling the automobile to be good in comfort.

The invention relates to an inhaul cable structure capable of being filled with dry air and a realizing method thereof. The inhaul cable structure comprises a cable body (11). Two ends of the cable body (11) are respectively connected with an upper anchorage device and a lower anchorage device, at least two stainless steel air inlet tubes (9) are arranged on the upper portion of the cable body (11), and at least two stainless steel air outlet tubes (21) are arranged on the lower portion of the cable body (11). According to the inhaul cable structure capable of being filled with the dry air and the realizing method thereof, water in the inclined inhaul cable body can be drained when the dry air is filled in the stainless steel air inlet tubes, and therefore hazardous substances such as the water can not be retained in the inclined inhaul cable body easily, steel wire corrosion can be avoided, and use stability of an inclined inhaul cable is guaranteed; humidity sensors are arranged on end mouths of the stainless steel air outlet tubes, and therefore environmental conditions of steel wires in the inclined inhaul cable can be monitored through humidity changes after the dry air flows in the cable body, and safety of the inclined inhaul cable is improved.

The invention relates to an integral-molding manufacturing method of carbon-fiber composite made oil tanks for small and middle sized unmanned aerial vehicle, solving the problems about application restrictions such as large thickness, heavy weight and poor environmental adaptability of the oil tanks molded by the prior art, improving application range of the integral-molded composite oil tanks while effectively reducing weight of the oil tanks, simplifying the molding process of the composite integral oil tanks, solving the problems of complicated process, high difficulty and unstable qualityof the oil tanks having complicated structures, effectively reducing production cost and shortening production cycle, and realizing low-cost rapid molding of the composite integral oil tanks on the premise of guaranteeing dimension and service stability. Residual foam after cleaning can be recycled and can be processed into powder to be mixed with epoxy resin solution to obtain a mixture, and themixture can serve as a potting compound of an inter-layer structure of the unmanned aerial vehicle.

The invention discloses a draught fan system control method. The draught fan system control method is applied to a draught fan system which comprises two or more draught fans. The two or more draught fans form four or more wind grades different in wind speed. The draught fan system control method comprises the steps of obtaining the outdoor environment temperature, and detecting the current use mode; when the current use mode is a refrigeration mode, keeping wind speed of the selected wind grade being positively correlated with the outdoor environment temperature; and when the current use mode is a heating mode, keeping wind speed of the selected wind grade being negatively correlated with the outdoor environment temperature. By means of the draught fan system control method, increase of the wind grades and multiple types of selection and variation of wind speed are achieved; the used temperature range is widened; a machine can conduct refrigeration and heating within a large environment temperature range; in addition, stable operation of the system can be maintained; the system is safe and high in reliability; the application scope is widened; and meanwhile, quality stability of products is further improved. The invention further discloses the draught fan system for implementing the draught fan system control method and air conditioning equipment provided with the draught fan system.

The invention discloses a glue-dispensing and laminating method for a touch display module. The method comprises the following steps: S1, providing a first substrate and a second substrate; S2, dispensing a glue on the laminating surface of the first substrate to form a rubber ring at the edge of the laminating surface of the first substrate; S3, pre-curing the glue ring; S4, dispensing the glue on the laminating surface of the first substrate and the inner surface formed by the rubber ring; S5, laminating the first substrate and the second substrate; S6, pre-curing the glue-dispensed area obtained in step S4; and S7, carrying out full-surface main curing on the laminated first substrate and second substrate to completely cure the glue between the first substrate and the second substrate.In the invention, the glue is dispensed on the laminating surface of the first substrate to form the rubber ring at the edge of the laminating surface of the first substrate, the rubber ring is pre-cured, the glue is dispensed on the inner surface formed by the rubber ring, and the glue flows in the area formed by the glue ring, so the method can effectively avoid the problem of glue spilling in the laminating process.

The invention provides an aramid fiber oiling agent. The aramid fiber oiling agent comprises, by weight, 92-82% of a lubricating agent, 3-10% of a bundling agent, 5-8% of a composite antistatic agent, and the balance is an annexing agent. The lubricating agent is fatty acid sebacate. The aramid fiber oiling agent has the good antistatic property in various humidity conditions, corrosion is not likely to happen, the requirements for reducing of fiber corrosion and enhancing of composite performance of fibers and rubber of aramid fibers with various standards in the spinning procuding or secondary processing process can be met, the aramid fiber quality can be effectively improved, and continuous processing quality can be effectively improved.

The invention relates to a coaxial in-arc wire feeding and out-arc powder feeding TIG electric arc additive manufacturing device. The device comprises a SiO2 glass tube, four powder feeding spray nozzles, a tungsten electrode red copper cooling body, a half-cracking hollow tungsten electrode and four powder feeding channels. Four types of alloy powder with different components can be supplied at most through the four powder feeding channels and the powder feeding quantity of each powder feeding channel is adjustable, and additive manufacturing of a functional gradient structure material part is achieved easily, so that material, structure and service performance of the additive manufacturing part are matched optimally.

The invention discloses a wireless transmission power adjusting method. The method includes acquiring access information of different access devices; according to change of access information in a preset time period, determining states of the access devices and signal change information of transmission signals received by the access devices in the preset time period; according to the states of the access devices and the signal change information of the received transmission signals, adjusting wireless transmission power. The invention also discloses a wireless transmission power adjusting device.

The invention discloses layered grinding equipment. The layered grinding equipment comprises a shell body which is provided with a feeding inlet, a discharging outlet and a grinding and pressing channel. The grinding and pressing channel is internally provided with grinding and pressing rollers, and rotating shafts connected with the grinding and pressing rollers, and a partition plate is arranged in the middle of the grinding and pressing channel. The direction of the partition plate is the same as that of the grinding and pressing channel. The grinding and pressing channel is divided into an upper grinding cavity and a lower grinding cavity through the partition plate. Screen nets are uniformly arranged on the partition plate. The grinding and pressing rollers comprise the upper-layer grinding and pressing roller and the lower-layer grinding and pressing roller. The rotating shafts comprise the upper-layer rotating shaft and the lower-layer rotating shaft. The feeding inlet communicates with the upper grinding cavity. The discharging outlet communicates with the lower grinding cavity. The shell body is provided with an upper driving motor and a lower driving motor. According to the layered grinding equipment, the structure is simple, operation is convenient, grinding is conducted through the up-down two-layer structure, and the situation of insufficient grinding can be effectively avoided; accordingly, regrinding is avoided, human and material resources are saved, and the machining cost is greatly reduced; and the using stability is good, the applicability is high, and the practicality is good.

The invention provides a beer distributing device, and belongs to the technical field of drinking equipment. The beer distributing device solves the problem that an existing beer distributing device is inconvenient to use. The beer distributing device with the improved structure comprises a seat body, a tap and a connecting piece allowing an inverted beer barrel to be connected are arranged on theseat body, a liquid inlet channel is formed in the connecting piece, moreover, the liquid inlet channel communicates with the tap, the connecting piece is further provided with an air outlet channel,and the beer distributing device is characterized in that the connecting piece is arranged at the top of the seat body, moreover, the tap is arranged on the side portion of the seat body, and a pressurization device communicating with the air outlet channel is arranged on the seat body. The beer distributing device with the improved structure is convenient to use.

The invention discloses a control system of a prefabricated bag packing machine and relates to the technical field of mechanical control of packing machines. The control system of the prefabricated bag packing machine comprises a feeding mechanism, a pushing mechanism, a bag stretching mechanism, a bag opening mechanism and a bag conveying mechanism and is characterized by further comprising a clamping mechanism and a translation mechanism. The control system of the prefabricated bag packing machine is applicable to packing machines for packing via prefabricated bags such as small packing machines, medium packing machines and large packing machines and the like; meanwhile, the control system of the prefabricated bag packing machine is also suitable for packing materials such as facial tissues, flat paper, paper towels, blocky foods, drugs, roll paper, unpackaged foods and the like. Through the control system of the prefabricated bag packing machine, the problems that processes in single station of the prefabricated bag packing machine are complex, various packing actions are needed, the travel distance among the stations is long, the equipment occupied area is large, the material is irregular and is easy to pour, the prefabricated bags are easy to break, the material-pushing travel distance is long, the packing effect is poor, and the packaging efficiency is low in the prior art can be solved.

The invention relates to a plasma processing device and a manufacturing method thereof. The plasma processing device comprises at least one part exposed out of plasma; and the part comprises a basic body, a first protection layer and a second protection layer, wherein the first protection layer is positioned in the surface of the basic body and comprises multiple holes internally, the second protection layer is placed at the surface of the first protection layer, the density of the second protection layer is higher than that of the first protection layer, and the percentage density of the holes in the second protection layer ranges from 0 to 1%. The plasma processing device is stable in processing state, the service life is prolonged, and the capability of resisting plasma erosion is improved.

The invention discloses a headphone jack connector which comprises plastic parts and at least an elastic contact piece, wherein the plastic parts comprise first and second plastic parts, the first and second plastic parts are connected in a fastened mode, the opposite side walls of one ends of the first and second plastic parts are semi-cylindrical concave cambered surfaces which are symmetric in structure, the contact piece is integrally formed in the first and second plastic parts, the tail end of the contact piece extends to the outsides of the first and second plastic parts, an elastic sheet of the contact piece extends to the outsides of the concave cambered surfaces of the first and second plastic parts, the headphone jack connector is also provided with a balancing piece, and the balancing piece is fixedly sleeved on the circumferential outside walls of the first and second plastic parts so as to fix the first and second plastic parts together. According to the invention, the connection strength and stability of the contact piece and the first and second plastic parts are ensured, the planeness of the tail end of the contact piece is ensured, the application stability of a headphone and a headphone jack is ensured, the subsequent assembling process is reduced, the production efficiency is improved, the operating time is saved, and the labor intensity of workers is reduced.

The invention discloses a zinc ion battery liquid metal composite negative electrode and a preparation method and application thereof. The composite negative electrode comprises a zinc metal matrix and a liquid alloy layer, and the liquid alloy layer is arranged on the surface of the zinc metal matrix. The characteristic of low solubility of zinc metal in the liquid gallium-based alloy is utilized, the zinc metal can be used as an electrochemically inert liquid coating material, the liquid alloy layer is formed by coating the surface of the zinc metal matrix with the liquid gallium-based alloy, and zinc ion flow, close to the surface of the negative electrode, of electrolyte can be well homogenized. Meanwhile, zinc is in a saturated state in the liquid gallium-based alloy, so zinc in the circulation process finally uniformly nucleates and grows on the surface of the zinc metal matrix, and dendrites are prevented from being formed on the surface of the composite negative electrode. Meanwhile, by compounding with gallium and indium with high hydrogen evolution overpotential, the corrosion resistance of the composite zinc negative electrode can be improved, the problem of side reactions such as negative electrode corrosion hydrogen production in the zinc ion battery is relieved, the cycle life of the zinc ion battery is prolonged, and the use stability and safety of the battery are improved.

The invention discloses a method for preparing heat-insulation pigment painting paste with high infrared reflectivity for buildings, and belongs to the field of chemical technologies for painting. The method includes compounding infrared reflection inorganic metal pigment color paste and aluminum paste with each other to obtain the heat-insulation pigment painting paste for the buildings. The heat-insulation pigment painting paste for the buildings can be added in emulsion paint for external walls, the emulsion paint can be coated on stone plates, and the total solar reflectivity and the infrared reflectivity of the stone plates can be obviously improved after the stone plates are naturally dried in the air. Compared with the prior art, the method for preparing the heat-insulation pigment painting paste for the buildings has the advantages that the heat-insulation pigment painting paste is high in infrared reflectivity, painting has diversified colors and is excellent in moisture retention and heat stability.

The invention discloses an airborne small-scale liquid cooling device which comprises a liquid cooling module and an intelligent control module. The liquid cooling module comprises an expansion tank, a liquid pump, a filter, a flow measuring device, a gas-liquid heat exchanger and an electric valve; a liquid inlet pipe seat of the expansion tank is connected with a liquid outlet pipe seat of the gas-liquid heat exchanger; a liquid outlet pipe seat of the expansion tank is connected with a liquid inlet pipe seat of the liquid pump; a liquid outlet pipe seat of the liquid pump is connected with a liquid inlet pipe seat of the filter; an liquid outlet pipe seat of the filter is connected with a liquid inlet pipe seat of the flow measuring device; a liquid outlet pipe seat of the flow measuring device is connected with airborne electronic equipment to be cooled; a liquid return pipe of the airborne electronic equipment to be cooled is connected with a liquid inlet pipe seat of the gas-liquid heat exchanger; an air inlet of the electric valve is connected with a ram air inlet; an air outlet of the electric valve is connected with an air inlet of the gas-liquid heat exchanger; an air outlet of the gas-liquid heat exchanger is connected with the atmosphere. The airborne small-scale liquid cooling device has the advantages of compact structure, novel and reasonable design, small size, high heat dissipating efficiency, strong universality and good cooling effect.

The invention discloses a horizontal type oil-gas separator for a diesel engine. The horizontal type oil-gas separator comprises a shell (1) and a filter element (2). The shell (1) is internally provided with a filter cavity (3) and a buffer cavity (4). The filter cavity (3) is formed in the transverse side of the buffer cavity (4) and communicates with the buffer cavity (4). A gas inlet (5) is formed in the position, below the filter cavity (3), of the shell, wherein the gas inlet (5) allows mixed gas to enter therein. The gas inlet (5) communicates with the filter cavity (3) through a gas inlet channel (6). A gas outlet (7) is formed in the position, above the buffer cavity (4), of the shell (1), and an oil returning opening (8) is formed in the position, below the buffer cavity (4), ofthe shell (1). The filter element (2) is located in the filter cavity (3) and is of an annular structure. An adjustment valve (9) is arranged at the position, above the gas inlet channel (6), inside the filter cavity (3). The outer diameter of the adjustment valve (9) is less than the inner diameter of the filter element (2) but greater than the inner diameter of the gas inlet channel (6). The adjustment valve (9) is eccentrically arranged relative to the gas inlet channel (6). Compared with the prior art, the horizontal type oil-gas separator has the beneficial effects of being high in oil-gas separation efficiency and good in application stability.

The invention discloses a cleaning device for a columnar supporting part of an above water drilling platform. The cleaning device comprises two clamping units, wherein each clamping unit comprises a traveling cylinder and a track ring, the track rings are fixed to the lower end surfaces of the traveling cylinders, flanges are arranged on the inner circumferential walls of the track rings in the circumferential directions of the track rings, outer tooth belts are installed on the upper end surfaces of the flanges, semicircular inner rings are further arranged below the traveling cylinders, inner tooth belts are arranged on the upper surfaces of the inner rings, and supporting seats are arranged below the track rings; and rotating motors are arranged on the supporting seats, the output endsof the rotating motors extend upwards after penetrating through gaps between the flanges and the inner rings, rotating gears are installed at the tail ends of the extension sections of the output endsof the rotating motors, the rotating gears are correspondingly matched with the outer tooth belts and the inner tooth belts, and cleaning assemblies are arranged on the lower surfaces of the supporting seats. Aiming at the defects in the prior art, the cleaning device can regularly clean attachments of the supporting part immersed in seawater, the damage probability of the supporting part is reduced, and the service life of the drilling platform is further improved.

The invention belongs to the technical field of biodegradable polymer materials, and especially relates to a special strengthening, toughening and transmittance increasing master batch for an ultrathin fully-biodegradable mulch film. The master batch is mainly prepared from poly(butylene adipate / terephthalate), polylactic acid, a strengthening, toughening and reflection reducing agent and a stability assistant. A preparation method of the master batch is simple and is easy to operate, and the obtained special master batch can be completely degraded and has a good dispersibility. A proper amount of the master batch is added in order to blow the ultrathin biodegradable mulch film with the thickness being 6 [mu]m or less, the film can be easily opened during the blow producing of the ultrathin mulch film, the processing stability and the processing efficiency are improved, and the produced mulch film has enhanced mechanical properties, improved light transmittance, reduced haze and remarkably improved weather resistance. The master batch combines strengthening, toughening, transmittance increasing and lubricating functions, is simple to use, improves the processing performances of the ultrathin fully-biodegradable mulch film, and reduces the use cost of the fully-biodegradable mulch film.

The invention provides a motor and controller assembly of an integrated structure. The motor and controller assembly comprises a motor casing, the rear end of the motor casing is open, a first cavity which is cylindrical is formed in the rear end of the motor casing, a stator, a rotor and a motor shaft are installed in the first cavity, and the motor casing is provided with a plurality of first threaded holes in the circumferential direction. The motor and controller assembly of the integrated structure is simple and compact in structure and reasonable in layout, a motor part and a controller part are arranged closely, the use number of cables and plugs is reduced, and therefore production cost is lowered, production efficiency is improved, the cables nearly have no exposed portion, abrasion damage caused by contact with a compartment and rain erosion are avoided, and the fault rate is reduced; meanwhile, a motor is separated from a Hall component through a plastic shell, rain erosion is avoided, and the service life and stability of the motor and a controller are guaranteed.

The invention relates to an explosion-proof solar energy LED equipment lamp which belongs to a novel explosion-proof lighting product which is safe and environment-friendly, and can increase income and decrease expenditure, mainly solves the problem of energy conservation of petroleum petrochemical illumination and comprises a solar module, a storage battery, a safety fence, a controller and an LED lamp; as the solar module adopts an intrinsic safety design, a circuit board is arranged in an explosion-proof box, the circuit board, the explosion-proof box and the intrinsic safety type or safety-increased storage battery are arranged in a control box, a 220VAC emergency power supply can be switched in, the lamp part is in the intrinsic safety type, the exteriors of all the parts are connected by cable, therefore, the equipment lamp explosion-proof technology not only causes the safe and reliable application of solar energy in the petroleum chemical industry to be possible, but also can fully utilize the renewable energy source to realize illumination and energy conservation; the LED with high quality has little attenuation and long service life, the direct-current constant flow actuation in the lamp leads the LED to maintain constant brightness; a singlechip and a special computer chip are used, thus having the function of emergency lamp; the lamp is dual-purpose, independent and safe, can form a system independently, and can operate independently and normally under unmanned operation, thus being convenient for use; and the equipment lamp can be widely applied in the petroleum chemical industry and other flammable and explosive hazardous fields.

The invention belongs to the technical field of continuous casting of steel and particularly relates to a multi-hole submersed nozzle device for a continuous casting crystallizer of square and round billets. The multi-hole submersed nozzle device comprises a nozzle body, wherein the nozzle body is surrounded by a side wall and a sealed base plate, and the upper end of the nozzle body is opened; a vertical inner cavity is defined by the body; side holes penetrating through the side wall are formed in the parts, close to the upper part of the base plate, of the side wall; a boss protruding towards the inner cavity is arranged at the center of the upper surface of the base plate; and an annular gap capable of changing a linear flow manner of liquid steel into an annular flow manner is defined between the boss and the side wall; and a plurality of side holes are uniformly formed in the side wall higher than the upper surface of the base plate and lower or equal to the upper surface of the boss. According to a multi-hole continuous-casting submersed nozzle, the poured liquid steel can flow uniformly and stably out from the side holes, so that the uniform temperature field and flow field of the crystallizer can be transversely maintained, and the impact of the liquid steel on primarily-generated solidified billet housings at the wall surface of the crystallizer can be further lightened so as to facilitate the reasonable solidification and the quality improvement of the casting billets.

The invention discloses a small table plate device which comprises a small table plate component assembly. The small table plate component assembly is divided into an inner table plate part assembly and an outer table plate part assembly which are mutually connected, wherein the inner table plate part assembly comprises an inner small table plate part, a slide rail fixing seat arranged on the inner small table plate part, a slide rail assembly arranged on the slide rail fixing seat, and a locking part assembly; the outer table plate part assembly comprises an outer small table plate part and an unlocking part assembly arranged on the outer small table plate part; the unlocking part assembly acts on the locking part assembly to drive to implement unlocking between the locking part assembly and a fixing part; and the slide rail assembly is formed by a main slide rail component, at least one middle slide rail component and a tail end slide rail component which are in slide fit mutually. In a limited space, a small table plate can be pulled out by a longer distance, so that not only is the tension distance of the table plate met, but also the strength and the using stability of the table plate are ensured.

The invention discloses a two-gear transmission suitable for an electric vehicle. The two-gear transmission comprises a shell, an overrun clutch arranged in the shell, a brake, a first-stage planetary reducer, a main reducing gear and a differential mechanism connected with the main reducing gear; the first-stage planetary reducer comprises an inner gear ring, a sun gear arranged in the center of the inner gear ring, a planet gear arranged between the sun gear and the inner gear ring and a planet carrier; the main reducing gear comprises a driving wheel and a driven wheel, and the driven wheel is connected with the planet carrier of the first-stage planetary reducer; the overrun clutch comprises an inner star wheel and an outer ring, the inner star wheel of the overrun clutch is connected between a motor output shaft and the sun gear of the first-stage planetary reducer; and the brake is connected with the inner gear ring of the first-stage planetary reducer. The two-gear transmission is reasonable in structural arrangement, two-stage speed adjustment can be achieved, the structure is more compact, the using stability and reliability can be effectively guaranteed, the applicability is high, and the practicability is good.

The invention relates to the field of motors, and discloses a plastic package stator and bearing end cap waterproof sealing structure and a plastic package motor. The plastic package stator and bearing end cap waterproof sealing structure comprises a plastic package stator, a bearing end cap and a waterproof sealing ring, wherein the plastic package stator is provided with an annular clamping flange, the bearing end cap is provided with an annular clamping groove matched with the annular clamping flange in a clamped and inserted mode, the annular clamping flange is provided with an axial end face towards the bearing end cap in the axial direction of the plastic package stator, the annular clamping groove is provided with a bottom groove face towards the plastic package stator in the axial direction of the plastic package stator, the waterproof sealing ring is elastically compressed between the axial end face and the bottom groove face, and a positioning groove allowing the waterproof sealing ring to be clamped, inserted and positioned is formed in the axial end face in a concave mode. The plastic package stator and bearing end cap waterproof sealing structure prevents influences of a needle insertion hole, a detection hole and a detachment notch which probably exist in the radial outer surface of the annular clamping flange on the sealing effect of the waterproof sealing ring, and achieves the aims of improving the waterproof sealing effect between the plastic package stator and the bearing end cap.

The invention discloses a liquid carbon dioxide fire extinguishing device for emergency rescue in disaster areas. The liquid carbon dioxide fire extinguishing device comprises a liquid carbon dioxide storage tank, and a base for bearing and fixing, wherein the storage tank adopts a double-layer vacuum composite structure with a thermal insulation material, so that the heat preservation storage time of liquid carbon dioxide is prolonged; liquid discharged by a liquid discharge valve in a control valve set is conveyed to a burning area through a liquid conveying pipe, a confluence assembly and a distant conveying pipeline in sequence; the gasification spraying is realized by a nozzle; and all pipelines are inserted in corresponding joints through quick joints. The liquid carbon dioxide fire extinguishing device further comprises a boosting control system capable of effectively performing the air pressure compensation for the storage tank to prevent the ice blockage in the liquid discharging and gasification spraying process; the boosting control system consists of a compressed gas cylinder, a gas cylinder valve, a pressure reducer and a conveying gas way connected with the storage tank, which are connected in sequence; and the conveying gas way comprises manual and automatic control gas ways, and is provided with a gas conveying pipe I and a gas conveying pipe II respectively connected with a gas boosting valve I and a gas boosting valve II in the control valve set.