120results about How to "Meet normal work" patented technology

The invention relates to a thermal management system for a pure electric vehicle, which is characterized in that it includes an electric drive system and a charger cooling circuit, a power battery cooling circuit, a power battery charging heating circuit, a passenger compartment heating circuit and a passenger compartment refrigeration circuit; The electric drive system and charger cooling circuit includes radiators, fans, kettles connected by pipelines, the electric drive system and charger cooling water pump installed in the circuit, as well as the motor controller and DCDC, as well as the charger and motor. The radiator realizes liquid-gas heat exchange to cool the heat dissipation components. Improve the environmental adaptability of electric vehicles, the power performance in high-temperature environments, the durability of key components, and the energy utilization efficiency of the entire vehicle.

The invention provides an underground cable fault detection system and fault detection method thereof. The underground cable fault detection system comprises a cable fault ranging device, a cable pathdetection device, and a fault point detection device. The cable fault ranging device consists of a low-voltage pulse signal source, a high-voltage pulse signal source, and a high-speed receiving device to realize signal detection in a low-voltage pulse reflection method and a flashover method. The cable path detection device includes an alternating-current high-voltage signal source and an electromagnetic induction receiving device; the frequency and amplitude of the alternating-current high-voltage signal source are adjustable; the alternating-current high-voltage signal source excites a to-be-detected cable to generate an electromagnetic field; and the electromagnetic induction receiving device detects the electromagnetic field generated by the to-be-detected cable. The fault point detection device includes a high-voltage pulse signal source, a direct-current signal source, an alternating-current signal source, a step-voltage receiving device, an electromagnetic induction receivingdevice, and an acousto-magnetic synchronous receiving device. The underground cable fault detection system can be applied to detection of underground cable open-circuit, short-circuit, grounding, low-resistance, high-resistance flashover and high-resistance leakage faults to obtain an accurate fault point.

The invention discloses a lightning protection power cable, which comprises a power transmission cable core and a coating layer for coating the cable core, wherein the coating layer comprises a shielding layer which shields the cable core, an outer tape layer which coats the shielding layer, an outer sheath which coats the outer tape layer, and a grounding layer which is arranged between the cable core and the shielding layer. In the lightning protection power cable, the grounding layer is arranged to improve the lightning protection capacity of the power cable, namely, the grounding layer conducts thunder and light entering the cable into the ground at the moment when a lightning fire occurs so as to ensure the security of the power cable and base station equipment connected with the power cable.

The invention discloses a low-pressure casting method for an automobile motor casing. The low-pressure casting method for the automobile motor casing includes the following steps that (1) a sand core structure of a spiral water channel is manufactured; (2) the sand core structure is placed on a lower mold body of a die-casting mold; (3) the automobile motor casing with the sand core structure of the spiral water channel is cast through a low-pressure casting device; (4) heat treatment is conducted on the automobile motor casing, then sand is vibrated out, and the automobile motor casing is provided with the complete spiral water channel; and (5) holes formed in the original sand core structure portion of the sidewall of the automobile motor casing are filled up through welding, so that the complete automobile motor casing with the spiral water channel is formed. The invention further discloses a motor casing structure. Through the low-pressure casting method for the automobile motor casing, the aluminum alloy low-pressure casting process is adopted and the spiral water channel is cast through the sand core of the spiral water channel, so that the cooling effect on a motor is guaranteed, the service life of the motor is greatly prolonged, the requirement for long-time working of an automobile can be met, and the weight of the whole motor is reduced by about 60%.

The present invention discloses control method and control device of buck single-inductor dual-output switch converter. The invention provided control method can real-time regulate power ratio of a first output branch and a second output branch effectively to make output power distribution of the dual-output branch more reasonable, by regulating and controlling high level clock cycle number and low level clock cycle number in strobe signal sequence. The invention provided buck single-inductor dual-output branch switch converter implements output power dynamic distribution of the first output branch and the second output branch, and under the premise of priority satisfy load power supply, charging the battery is also assured, and total of two parts of power is controlled is a stable range, comparing with the prior art, even if power rating inputted is small can also ensure normal operation of the first output branch load.

The invention discloses a novel multi-functional and environment-friendly beacon light. The beacon light comprises a beacon light body, wherein a battery pack module is fixedly arranged in the beacon light body; a clean energy complementary electric generation system comprises a solar power generation device, a wind power generation device and a wave power generation device; a multi-information acquisition system comprises a weather information acquisition module, a hydrological information acquisition module and an oil stain detection module; a positioning and communication system is used for acquiring position information of the beacon light and remote data communication; a remote management system is used for displaying received position information of the beacon light, weather information, hydrological information and oil stain information through a man-machine interaction interface, monitoring the deviation condition and the darkness state of the beacon light as well as the charging condition of the battery pack module in real time and automatically giving out an alarm when the work state of the beacon light is abnormal. The beacon light can be powered up by solar energy, wind energy and wave energy and can automatically perform telemetering on hydro-meteorological elements such as waves on the sea, air temperature, air pressure and the like.

The invention relates to a low-temperature condition release ammonia reducing agent composition and a preparation method thereof, and belongs to the low-temperature condition release ammonia reducing agent composition and the preparation method thereof. The composition is prepared by the following raw materials in parts by mass: 15-21 parts of ammonium carbonate, 0.79-1 part of urea, 0.80-1.57 parts of ammonium formate, 2.0-8.3 parts of low molecular alcohols, and 25-31 parts of high-purity water. Compared with a traditional urea reducing agent, the composition can release an ammonia source under a lower temperature. The obtained product can be used under the environment below -15 DEG C, and can totally satisfy normal operation of an SCR system. The freezing point of the product is -15 DEG C; and the product can be used in four reasons in the south and in spring, summer, autumn and early winter in the north.

The invention discloses a power-on / power-down output tri-state control circuit for a CMOS device power supply. The tri-state control circuit comprises an MOS tube series resistance voltage-division circuit, a PMOS switching tube, and a shaping filtering circuit. According to the shaping filtering circuit, a PMOS transistor being equivalent to a capacitor is coupled to a grid terminal and a power supply terminal of the PMOS switching tube; an NMOS transistor being equivalent to a capacitor is coupled to a drain terminal and the power supply terminal of the PMOS switching tube; and a buffer circuit is connected to the drain terminal and a control circuit output terminal of the PMOS switching tube. According to the invention, when the power-on value or the power-down value of the power supply of the device is lower than the set threshold level, the device output port is controlled to be in a high impedance state, thereby maintaining accuracy of signal transmission at the device output bus and protecting the device from being damaged; and when the power-on value or the power-down value of the power supply of the device is higher than the set threshold level, the control circuit returns the control to the controlled device output port and thus the device can output an enabling signal OE to control three states of the output port.

Based on the silicon optical diode, the device can detect illuminance less than 10 to the power -8 Lx. The silicon optical diode and the magnetifier are installed in the electromagnetic shielding box. The output end of the magnetifier is connected to the input end of the voltage to frequency converter. The decimal data collector with at least 6 digits includes the collection counter, the collection register, the time base generator for the counting gate, the background counter, the background register as well as the OR gate and the full subtracter. The invention provides long-lasting steady work in bad environment, which does not affect the precision, long distance data transmissions well as mini type an low power consumption. The capabilities as of self-adapting and self-starting, satisfy the requirements of no-attendance.

The invention relates to the technical field of building equipment, in particular to a large-span corridor basket comprising an operating platform. Hanging supports are arranged at two ends of the operating platform respectively. Lift mounts are disposed at two ends of the operating platform respectively. Two lifts are mounted on each lift mount. Each hanging support comprises horizontal bars and vertical bars perpendicularly intersecting with each other. A weight is suspended below the far end of each horizontal bar; one end of an operating wire rope is connected to one end, corresponding to the weight, of the horizontal bar; the other end of the operating wire rope is connected to the input end of the corresponding lift; a body part of the operating wire rope is disposed in a pulley groove in the top of the corresponding vertical bar. The part, on the lower portion of the corresponding hanging support, of each operating wire rope is provided with an anti-quick rise limit plate. The large-span corridor basket can be effectively applied to mounting, decorating, maintaining and cleaning large-span space roofs and walls of high-rise buildings.

The invention discloses a white light emitting diode (LED) chip and a preparation method thereof. The white LED chip comprises a blue LED chip with a vertical structure and a yellow LED chip from which a substrate is removed, wherein the blue LED chip and the yellow LED chip are bonded together through a transparent conductive adhesive; an N electrode is formed on the lower surface of the blue LED chip with the vertical structure; and a P electrode is formed on the upper surface of the yellow LED chip from which the substrate is removed. The preparation method of the white LED chip comprises the following steps of: preparing the blue LED chip with the vertical structure and the yellow LED chip; connecting the yellow LED chip together with the blue LED chip through the transparent conductive adhesive; removing the substrate and a buffer layer from the yellow LED chip; manufacturing the P electrode on a P-type limiting layer of the yellow LED chip from which the substrate is removed; and evaporating electrode metal on the lower surface of a substrate of the blue LED chip to form the N electrode so as to obtain the white LED chip. The white LED chip prepared by the method can directly emit white light, and has the advantages of long service life, high efficiency, stability and the like.

The invention discloses a double-frequency micro-strip antenna adopting a multilayer structure. The double-frequency micro-strip antenna comprises upper layer micro-strip antenna bodies, a lower layer micro-strip antenna body, a feed metal micro-strip line and a feed port. The lower layer micro-strip antenna body comprises a common metal ground plane and a lower layer micro-strip antenna base plate. A large first rectangular gap and a small second rectangular gap are formed in the common metal ground plane. The feed micro-strip line is located on the reverse side of the lower layer micro-strip antenna base plate. The upper layer micro-strip antenna bodies are stacked on the common metal ground plane and conduct coupling feed through the small gap in the common metal ground plane and the feed metal micro-strip line. Radiating elements of the upper layer micro-strip antenna bodies are square metal sheets which form an inverted angle at the diagonal positions. The large gap of the lower layer micro-strip antenna body is used as the radiating element, and the lower layer micro-strip antenna body directly feeds through the feed micro-strip line. The double-frequency micro-strip antenna is small in size, simple in structure, easy to machine, capable of being used in a GPS and a WLAN at the same time, and can be easily integrated with a circuit.

The invention discloses a mining dust removal fan. The mining dust removal fan comprises a suction section and an enlarged section which constitute a venturi structure, and a drainage chamber is further arranged between the suction section and the enlarged section; the drainage chamber comprises an enlarged component I and an enlarged assembly II; the mining dust removal fan further comprises a valve block and a suction valve mounted on the valve block, a nozzle is disposed at the central position of the suction section and oriented from the suction section toward the drainage chamber; and a material inlet is formed in the top of an additive material tank for feeding. The mining dust removal fan has the advantages that a vacuum environment is formed by the high-pressure gas of the Coanda effect, and dust is sucked in and the high-pressure mixed water is used for cleaning the dust. Meanwhile, the mining dust removal fan has no electrical elements, the management difficulty and risk factor of the dust removal fan are reduced, and the work in a high gas environment is met.

The invention discloses an air-cooled soft-packed power battery box for locomotives, which belongs to the technical field of rail transit. A battery box body is divided by heat insulation walls into multiple independent heat dissipation frames. Each heat dissipation frame is provided with an insulating sealing plate at one end, an air inlet is arranged on each insulating sealing plate, and air outlets are arranged at the other end. Each heat dissipation frame is internally provided with at least one battery module. Tab air ducts are formed between the tops of the battery modules and the insulating sealing plates. Gaps are reserved and side air ducts are formed on the two sides of the battery modules. Each battery module includes several brackets, a battery core is clamped between every twoadjacent brackets, and the sides of the battery cores and the battery tabs are exposed in the side air ducts and the tab air ducts. Thus, the heat dissipation effect of the battery is improved, the temperature distribution inside the battery is more uniform, non-uniform current distribution inside the battery is reduced, and the cycle life of the battery is increased. At the same time, the air-cooled soft-packed power battery box for locomotives is simple and compact in structure, light and safe in use.

An apparatus, which effects the optical grating mold-match of waveguide array and the temperature control of wave-dividing instrument, relates to the techniques of the optical grating mold-match of waveguide array (AWG) and the temperature control of wave-dividing instrument, comprising: AWG module for multiplexing and de-multiplexing optical signals with multi-wavelengths; temperature collecting module for collecting temperature signals of the AWG module and comparing the signals with setting values: signal processing module for processing the signals collected by the preceding stage and back-fed by the post stage and outputting the result to the driving circuit; driving module for driving and heating AWG module.

The invention discloses a period detection system adapting to FPGA local reconstruction, and aims to provide a framework which facilitates function transplantation and efficiently utilizes hardware resources. According to the technical scheme, a platform control management module receives control information sent by a system bus through communication middleware, monitors the operation of whole platform software in real time according to the requirements of the system, and controls the reconstruction of a reconstruction area. The generated global and local bit stream files and other configuration data are placed on a Flash memory, control information issued by the system is analyzed, and a scheduling processing process is set based on a periodic reconstruction algorithm of a function priority. During reconstruction, corresponding local reconfiguration data in a detection period is sequentially read, the function Bit operation body is serially loaded to the ICAP configuration interface of the FPGA. After loading is completed, the current reconstruction function is operated, reconstruction loading of the function in the reconstruction area is achieved, and the requirement for periodictime division multiplexing of the function on a periodic detection system hardware platform is met.

The invention relates to the technical field of a power generator and discloses a diesel power generator with trinity heat radiators. The diesel power generator comprises a diesel engine unit (14), a generator set (15) and a heat radiator group, wherein the heat radiator group in arrangement corresponding to the diesel engine unit (14) is positioned at the front end of the diesel engine unit (14), the heat radiator group comprises a water tank heat radiator (16), an air cooler (22), an engine oil heat radiator (8) and a fan (21), the water tank heat radiator (16) and the air cooler (22) are in parallel arrangement and are connected through an inner side plate (7) for forming a power generator heat radiator main body, and the engine oil heat radiator (8) is arranged in a lower water storage chamber (3) of the water tank heat radiator. The diesel power generator has the advantages that hot water in a water tank of the diesel engine can be cooled, the normal work of the diesel engine cooling system is maintained, the normal work of mixing fogging oil with mass air by the diesel engine can be met, and in addition, the oil temperature of the engine oil of the diesel engine can be reduced through the water tank heat radiator.

The invention provides a low voltage difference signal LVDS composition circuit comprising the following modules: an LVDS module; a first current mirror module and a second current mirror module; a sampling module used for sampling common mode level outputted by the LVDS module; a feedback control network module used for respectively generating a first feedback signal and a second feedback signal according to the sampled common mode level, respectively sending the first and second feedback signals to the first current mirror module and the second current mirror module, and adjusting output current of the first and second current mirror modules; when the common mode level is higher than a first preset value, the output current of the first current mirror module is reduced and the output current of the second current mirror module are increased; when the common mode level is smaller than a second preset value, the output current of the first current mirror module is increased and the output current of the second current mirror module is reduced; the first preset value is bigger than the second preset value; the LVDS composition circuit can satisfy normal work under high speed state, and adaptation capability of PVT in a large scope.

The invention discloses an adjustable type rotor-wing power machine head device for a fixed-wing unmanned aerial vehicle and belongs to the technical field of unmanned aerial vehicles. The adjustabletype rotor-wing power machine head device comprises a machine head, a power system, a first adjustable rotor wing mechanism and a second adjustable rotor wing mechanism, wherein the machine head comprises a first front end part, a first body and a first rear end part. The first adjustable rotor wing mechanism comprises a first screw propeller, a first motor, a first inclined rotary part and a first steering engine; the second adjustable rotor wing mechanism comprises a second screw propeller, a third motor, a second inclined rotary part and a second steering engine. The power supply part is provided with a first output opening, a second output opening, a third output opening and a fourth output opening; the displacement part comprises a first steering engine and a second steering engine; the driving part comprises a first motor and a second motor; the adjusting part comprises a first electronic speed control and a second electronic speed control. According to the adjustable type rotor-wing power machine head device, the cruising duration time of the unmanned aerial vehicle is increased and the requirements of each electrical appliance of the unmanned aerial vehicle on energy sources are met; when the unmanned aerial vehicle takes off, lands and flies, the adjustable type rotor-wing power machine head device has the technical effects of low requirements on fields and strong adaptability.

The invention discloses a quickly cooled long-life conical rotor motor, belongs to the technical field of motors, and solves the problem that in the prior art, a conical rotor motor is prone to generating a large amount of heat, so that the conical rotor motor is difficultly quickly cooled. The quickly cooled long-life conical rotor motor comprises a shell and a rotating shaft. The rotating shaftis arranged inside the shell. A stator is connected onto the inner wall of the shell. The inner cavity of the stator is conical. A rotor is mounted on the rotating shaft, and is conical. A front end cover is mounted at the front end of the rotating shaft. The quickly cooled long-life conical rotor motor is characterized in that a fan brake wheel is connected with the rear end part of the rotatingshaft; an angle end heat conduction head is connected to the shell around the fan brake wheel; a brake cooling device is connected with the rear end of the shell; ventilation blades are mounted in thebrake cooling device; and a liquid cooling pipe is connected with the brake cooling device. The quickly cooled long-life conical rotor motor is good in cooling effect, fast to cool, stable and reliable in operation, and long in service life.

The invention discloses ternary compound low-alcohol-type biodiesel with the low-temperature fluidity and a preparation method thereof. The ternary compound low-alcohol-type biodiesel is prepared by mixing, by volume, 5-30 parts of drainage oil biodiesel, 5-30 parts of lower-carbon alcohol and 60-90 parts of direct coal liquefaction diesel. The ternary compound low-alcohol-type biodiesel with the low-temperature fluidity is prepared through the steps that ultrasonic dispersion is conducted on the drainage oil biodiesel, the lower-carbon alcohol and the direct coal liquefaction diesel for 15 min to 20 min at room temperature, and standing is conducted for 4 h to 5 h. The ternary compound low-alcohol-type biodiesel has the excellent low-temperature fluidity, is simple and efficient in preparation process, green and environmentally friendly, and can be directly applied to a diesel engine without other treatment; compared with pure drainage oil biodiesel, the turbidity point, the cold filter plugging point and the pour point of the ternary compound low-alcohol-type biodiesel are lowered by 19 DEG C to 40 DEG C, 21 DEG C to 41 DEG C and 24 DEG C to 53 DEG C respectively, and the normal working requirements of various diesel motor vehicles at low temperature can be met.

The invention provides a no-tillage electronic control corn compound planter. The planter comprises a rack, a stirring knife cleaning mechanism and a seeding mechanism, wherein the stirring knife cleaning mechanism comprises a spline input shaft, a speed reducer, a single-output commutator, a dual-output commutator, a universal joint, a universal joint connecting shaft, a vertical rotary stirring knife, a cutter head and a cutter shaft; the spline input shaft is in transmission connection with the speed reducer; the speed reducer and the double-output commutator are in transmission connection; one end of the universal joint connecting shaft is connected with the universal joint; the other end of the universal joint connecting shaft is connected with the double-output commutator; the universal joint is connected with the single-output commutator; the speed reducer, the double-output commutator and the single-output commutator are in transmission connection with the cutter shaft; the cutter shaft is connected with the cutter head; the vertical rotary stirring knife is connected with the cutter head; and the seeding mechanism comprises a control system assembly, a seeding apparatus assembly, a seeding apparatus shaft, a seeding pipe and a seeding coulter assembly. The no-tillage electronic control corn compound planter can stably work under the no-tillage operation condition; and accurate seeding and retest operation can also be achieved.

The invention provides a micro gas turbine. The turbine comprises a high-pressure machine, a low-pressure machine and a regenerator, wherein the high-pressure machine comprises a gas compressor, a high-pressure turbine, a combustion chamber and a high-pressure rotor system, the low-pressure machine comprises a low-pressure turbine, a motor, a low-pressure rotor system, and a flue gas chamber, thegas inlet end of the gas compressor communicates with the outside, the exhaust end of the gas compressor communicates with a first inlet of the regenerator, a first outlet of the regenerator communicates with an inlet of the combustion chamber, the exhaust end of the combustion chamber communicates with the gas inlet end of the high-pressure turbine, the exhaust end of the high-pressure turbine communicates with the gas inlet end of the low-pressure turbine, the exhaust end of the low-pressure turbine communicates with an inlet of the flue gas chamber, an outlet of the flue gas chamber communicates with a second inlet of the regenerator, and a second outlet of the regenerator communicates with the outside. According to the turbine, through reasonable matching arrangement of the regenerator, the micro gas turbine with a compact structure is formed, so that the thermal efficiency can be sufficiently improved.

A sea-air amphibious aircraft. The fuselage 1 is shuttle-shaped, and the vertical section shape is approximately rhombus. Fuselage 1 middle part is water storage compartment 24, water storage compartment front bulkhead 14, water storage compartment rear bulkhead 18, forms water storage compartment 24 with fuselage middle part, and fuselage middle part is provided with built-in bomb bay 16 simultaneously. The front part of the water storage tank 24 is provided with a water inlet 15 , the rear part is provided with a water outlet 17 , and the top is provided with an air outlet 25 . The motor 11 is located at the tail of the fuselage 1, and the propeller 12 is installed on the motor 11. The right wing 2 and the left wing 3 are variable-sweep wings, which are respectively located on the right and the left of the middle part of the fuselage 1. The right canard 4 and the left canard 5 are respectively located on the right and the left of the fuselage 1 front. Right wing 2 is equipped with right flap 6 and right aileron 7. Left flap 8 and left aileron 9 are installed on the left wing 3. The vertical stabilizer 10 is located above the tail of the fuselage 1 . The landing gear of the aircraft is distributed at the front three points. Radar and sonar 13 are located at the nose of the fuselage 1 .

The invention provides a comprehensive energy-saving refrigerating system which comprises a plurality of condensation sections and a plurality of evaporation sections. The condensation sections are connected with the evaporation sections located below the condensation sections on the basis of the heat pipe technology. Natural cold sources and / or cheap cold sources are adopted for the condensation sections. The condensation sections are heat pipe condensation sections, and the evaporation sections are heat pipe evaporation sections. According to the comprehensive energy-saving refrigerating system, the natural cold sources and manual cold sources are reasonably and effectively combined, and the effects of energy conservation and environment protection are achieved.

The invention provides an article checking system and an article checking and processing method and device. The article checking system includes a photoelectric identification OEID reading-writing device arranged on a light source in a specified space and used for issuing query commands to OEID tags arranged on articles in the specified space according to light signals transmitted by the light source, identifying the articles according to uplink data fed back by the OEID tags and sending identification results to a monitoring terminal, the OEID tag for sending the uplink data to the OEID reading-writing device under the trigger of the query command, and the monitoring terminal for obtaining article checking results of the articles in the specified space according to the identification results. By the adoption of the technical scheme, high power consumption, large harm to human, limited working environment and the like existing in related arts and an RFID tag technology are solved, and a technology for reading and writing other tags capable working normally can be achieved in many cases.

The embodiment of the invention belongs to the technical field of projectors, and relates to a desktop projector which comprises a body. The body comprises a shell, a first fan, a radiator, a light flux, a light-emitting lamp strip plate, a first Fresnel lens, a display screen, a second Fresnel lens, a reflector and a lens. The first fan is arranged close to the shell, a light source of the desktop projector is arranged on the radiator, the radiator is provided with a heat dissipation base, and one end of the heat dissipation base is tightly attached to the first heat dissipation fan. The light flux, the first Fresnel lens, the display screen and the second Fresnel lens are sequentially arranged in parallel, and the light-emitting lamp strip plate is arranged between the light flux and the first Fresnel lens, wherein the light flux is arranged on the heat dissipation base; the reflector is arranged at one side, deviating from the display screen, of the second Fresnel lens, an included angle is formed between the reflector and the second Fresnel lens, and the included angle is larger than 30 degrees and smaller than 60 degrees; the lens is arranged in the included angle range of the second Fresnel lens and the reflector and is used for projecting an image of the display screen to a desktop or the display screen located on the desktop.

The invention discloses a device for supplying heat to a water resource heat pump by combination of solar energy and air energy, belonging to the technical field of water resource heat pumps. The device comprises a solar heat gathering device, an air energy heat exchange device, the water resource heat pump and a hot water supply tank, wherein the water resource heat pump is in pipeline connection with the hot water supply tank; and the solar heat gathering device and the air energy heat exchange device are combined to supply heat to the water resource heat pump. The device has is simple in structure, is simple and reasonable and is convenient to install and use, can simultaneously supply heat through solar energy and air energy and can also selectively supply heat, air energy and solar energy complement each other, when solar energy is affected by cloudy and rainy weather, and heat is insufficiently supplied, air energy can also meet the condition for normal operation of a water resource heat pump unit, disadvantages are avoided, and the energy efficiency ratio of the water resource heat pump is obviously increased.

The invention relates to a top-drive guide rail assembly and a top-drive guide rail system and belongs to the technical field of petroleum machinery. The top-drive guide rail assembly comprises connecting parts, limiting parts and at least two guide rail units. Every two adjacent guide rail units are connected through the corresponding connecting part to form a connecting portion which comprises a first connecting portion body and a second connecting portion body, wherein the first connecting portion body is connected to the second connecting portion body in an inserted mode, and the first connecting portion body and the second connecting portion body are connected through the corresponding connecting part; and the second connecting portion body is provided with a thread limiting hole, and the corresponding limiting part penetrates in the thread limiting hole and abuts against the corresponding connecting part. According to the top-drive guide rail assembly, every two adjacent guide rail units are connected more firmly, and guide rail connection stability is guaranteed. The top-drive guide rail system comprises the top-drive guide rail assembly, guide rail connection for the system is stable, and normal work of top-drive guide rails can be met.

The invention relates to a mine electric power electrical distribution cabinet with good dust removal performance, belonging to the technical field of electrical equipment. Aiming at the problems of simple structure design, single function, poor dust-proof effect and inconvenient use of distribution cabinets, the mine electric power electrical distribution cabinet with good dust removal performance is provided. The mine electric power electrical distribution cabinet with good dust removal performance comprises an distribution cabinet body; the inner walls of both sides of the distribution cabinet body are welded with sliding guide rails; sliding seats are connected on the outer walls of one side of the two sliding guide rails in a sliding manner; the outer wall of one side of the sliding seat is provided with an installation groove, and the inner wall of the installation groove is clamped with a storage plate; and the outer wall of one side of the sliding seat is provided with a threaded hole, and the inner wall of the threaded hole is connected with a positioning bolt through the thread. The invention can perform dynamical balance control of the temperature inside the distributioncabinet, therefore, the service performance of the distribution cabinet is ensured; and the invention can adjust the storage space inside the distribution cabinet, thereby effectively arranging the electronic components, therefore, the smoke and dust pollution to the distribution cabinet caused by the environment around the mine is avoided.