48results about How to "Quick Repair Replacement" patented technology

The invention relates to a fuel-powered multi-rotor unmanned plane fuel supply scheme. An all-in-one fuel tank, a fuel pump, a fuel strainer, a fuel pressure regulator, a one-to-more nipple and a fixed support constitute a whole fuel supply system. The central idea of the scheme is all-in-one one-to-more combined design. The fuel tank adopts the all-in-one design: a plurality of partitions with smaller height than the fuel tank are arranged inside the fuel tank, and the upper and lower ends of each partition do not contact the upper and lower surfaces of the fuel tank, so that the whole fuel tank is divided into a plurality of independent small fuel tanks which communicate with each other. The nipple adopts the one-to-more design: one fuel inlet is divided into a plurality of fuel outlets. The fuel pressure regulator and the one-to-more nipple form an integral body, and do not need special arrangement. The scheme solves the following problems: fuel shortage of a certain engine can easily occurs when the fuel-powered multi-rotor unmanned plane is inclined, each engine of the fuel-powered multi-rotor unmanned plane needs one fuel supply system, bubbles can easily appear in the fuel supply system, and the fuel pressure regulator needs to be independently arranged.

The invention belongs to track beds and particularly discloses a side floating track bed. The side floating track bed comprises a floating plate, a gasket and an elastic vibration isolator, wherein the elastic vibration isolator is arranged on the lower outside of the floating plate and supported on the floating plate by the gasket. The side floating track bed is characterized in that: an ejection through hole is formed at the position, corresponding to the elastic vibration isolator, on the floating plate; the contour size of the gasket is greater than that of the ejection through hole, and an opening is formed on the gasket; and the opening of the gasket is at least partly overlapped with the projection of the ejection through hole on the top face of the elastic vibration isolator in a working state. The side floating track bed greatly reduces the used amount of the elastic vibration isolator, can greatly reduce the working amount and operation difficulty of the ejection and post overhauling of the floating track bed, and is improved in all aspects including construction period, manufacturing difficulty, manufacturing cost, maintenance cost and the like. The invention is a revolution in the technical field of the side floating track beds, and the economical and social benefit of the side floating track bed will be fully demonstrated in a very short time in the future, so that the fast popularization of the side floating track bed technology is promoted.

The invention relates to a floating pin positioning device for use in product processing, which comprises a gland, a positioning pin, a spring and a processing fixture basic hole. The gland is arranged on two shoulders of the positioning pin; the spring is arranged in the positioning pin; and the positioning pin is arranged in the processing fixture basic hole. Compared with the prior art, the floating pin positioning device for use product processing has the advantages of wide application range, flexibility, high cost performance, convenient and quick maintenance, convenient and quick clamping for a product, automatic correction, eliminating the influence of the size changes (moderate) of a blank on the size after the product is processed, and the like.

The invention discloses a novel suction head variable in spacing and a packaging machine using the same. The suction head variable in spacing comprises a push rod, a front sliding block is fixed to the front end of the push rod, the rear end of the push rod is sleeved with a rear sliding block, each shaft segment is sleeved with a middle sliding block, the two ends of two wall plates are vertically connected into a rectangular frame through guide rails respectively, the rear sliding block is fixed to the rear ends of the inner side faces of the two guide rails, and the front sliding block andthe middle sliding blocks are slidingly connected to the guide rails; two spring retractable and fast-changing type vacuum suckers are fixed to the front sliding block and the lower end of each middlesliding block separately, the lower end of each air pipe connector is communicated with a vacuum sucker, multiple protrusive limiting blocks are arranged on the inner sides of the guide rails, and aretractable end of a clamping air cylinder penetrates through the wall plate on the rear side to be connected to the rear end of the push rod. The suction head has the advantages that the spacing canbe changed for transferring products, the production efficiency is high, the precision of placing the products is high, and the maintenance utilization rate is decreased.

The invention discloses a rigidity-adjustable water lubricating stem bearing. The stem bearing comprises a bearing sleeve, bearing supports and rigidity-adjustable bearing bushes. Each rigidity-adjustable bearing bush is of a flexible structure with an airtight cavity. The rigidity-adjustable bearing bushes are fixedly connected in the bearing sleeve through the bearing supports. The rigidity-adjustable bearing bushes are distributed in the circumferential direction of the bearing sleeve. The surfaces of the rigidity-adjustable bearing bushes are higher than the inner diameter surface of the bearing sleeve. A flow partition water groove is formed between every two adjacent rigidity-adjustable bearing bushes. The rigidity-adjustable bearing bushes can be used for adjusting the rigidity of the bearing in the manner that high-pressure gas is changed in and discharged from the airtight cavities of the rigidity-adjustable bearing bushes. By means of the rigidity-adjustable water lubricating stem bearing, the problems that the maintenance period is long and the maintenance workloads are large when an existing water lubricating stem bearing is replaced or maintained, and the rigidity of the water lubricating bearing cannot be adjusted to adapt to vibration of a stem shaft system can be solved.

The invention relates to a masonry method of an RH refining furnace capable of reducing consumption of refractory materials, belonging to the technical field of metallurgy external refining refractory material masonry. The technical scheme comprises the following steps: carrying out fire-proof brick masonry by in a break joint mode in the masonry process of a vacuum groove; digging only a part ofcirculation tubular bricks and working lining magnesite chrome bricks right above without removing all the working lining magnesite chrome bricks right above the circulation tubular bricks in replacing a dip pipe, wherein the size of the dug part is just the size which ensures that the dip pipe can be taken out; and repairing and recovering the tubular bricks and the dug working lining magnesite chrome bricks right above after the dip pipe is replaced. The method provided by the invention has the beneficial effects that because a trigonum digging and repairing method is adopted, namely a break joint masonry mode is adopted by utilizing the upper layer bricks and the lower layer bricks, a digging and repairing mode similar to a pyramid type is adopted, thus the number of bricks dug in the upper layer working lining is reduced, the improper offline amount of magnesite chrome bricks is reduced effectively, the using amount of the magnesite chrome bricks is saved, the masonry cost is lowered, the labor intensity of workers is relieved, and the aims of rapid repairing and replacing the dip pipe are achieved.

The invention relates to the field of mine excavation, and specifically relates to a method used for simultaneously achieving coal breaking and surface cleaning with one time of impulsion, and an excavating impulsion shovel used for realizing the method. The excavating impulsion shovel comprises an impulse-cutting coal breaking and surface cleaning section and a fixing section. The impulse-cutting coal breaking and surface cleaning section comprises shovel teeth which are arranged on fixing components. The shovel teeth are positioned at the front part of the excavating impulsion shovel. The shovel teeth and the height of the coal seam requiring excavating form an I shape, a J shape and / or a ] shape. Coal breaking and surface cleaning are simultaneously achieved with one time of impulsion. With the arrangement of the cutting edges of the shovel teeth, a plane relative to a coal mining machine walking direction can be cleared. The pressure on the top of the excavating impulsion shovel is concentrated, such that a large impact force can be generated in a moment, and the coal seam can be broken under compressive stress. With the shapes and the arrangement of the shovel teeth fixed on the fixing components, coal breaking and surface cleaning can be simultaneously achieved with one movement. Therefore, with the excavating impulsion shovel, coal mining efficiency can be improved in respects of structure configuration, time utilization and impact force utilization. Energy and time can be utilized and saved to a maximal extent, and an equipment structure is optimized and simplified.

The invention relates to the technical field of forestry devices, in particular to a forestry engineering seedling culture device. The forestry engineering seedling culture device comprises a water tank, a lifting mechanism arranged in the water tank, a pore plate connected with the top of the lifting mechanism, a seedling accommodating mechanism arranged on the upper end face of the pore plate and an adjustable seedling straightening mechanism arranged at the upper end of the water tank; the upper end of the seedling accommodating mechanism is positioned in the water tank when the lifting mechanism is completely contracted; and the lower end of the seedling accommodating mechanism is positioned outside the water tank when the lifting mechanism completely extends out. According to the forestry engineering seedling culture device, the adjustable seedling straightening mechanism is simple in structure and convenient to mount and dismount, when the adjustable seedling straightening mechanism is used together in cooperation with a supporting mechanism, the device is high in structural stability and convenient to use, component parts are convenient to maintain and replace, and the device is high in straightening efficiency and extremely good in straightening effect; after seedlings are cultivated, the seedlings are moved out from the side faces, the operation is rapid, tree roots and trunks are hardly damaged, and the survival rate of the transplanted seedlings is greatly increased; and the device is convenient to maintain.

The invention discloses a floor polishing machine, and belongs to the field of building decoration. The floor polishing machine comprises two symmetrically-arranged supporting plates, a cross plate mounted between the two supporting plates, a motor fixedly mounted on the cross plate, a fixing clamping plate and a polishing wheel. The fixing clamping plate is of a disc-shaped structure, side wallsstretching downwards are arranged on the edge of the fixing clamping plate along the circumference of the fixing clamping plate, screw holes and threaded rods penetrating through the screw holes are arranged on the side walls, and the upper end of the fixing clamping plate is fixedly connected with an output shaft of the motor. The polishing wheel is mounted between the side walls of the fixing clamping plate and fixed through through the threaded rods. Dust suction mechanisms for sucking fragments are arranged on the two sides of the supporting plates. The polishing wheel is easy and convenient to dismount and mount, the polishing wheel can be conveniently and rapidly dismounted to be washed and replaced when the polishing machine works, the polishing effect of the polishing machine is greatly improved, the dust suction mechanisms are mounted at the proper positions of the polishing machine, and in cooperation with the structure of the polishing machine, the cleaning effect on the fragments is good.

The invention discloses an electric cabinet, a method and a device for modular combination of the electric cabinet. The electric cabinet comprises a filtering module used to filter interference signals of power signals and improve electromagnetic compatibility effect of the electric cabinet, a drive module used to drive a variable frequency motor and realize rotating speed adjustment of the variable frequency motor, a rectification inverse module used for converting power systems, and a master control module used to control loads to realize a control function of the electric cabinet. When a power system is not matched, the rectification inverse module performs voltage conversion. The electric cabinet solves a problem in the prior art that universality degree of an air conditioning controlmainboard is poor, and universality degree is improved, and rapid maintenance and changing can be realized.

The invention relates to an adapting piece of water pipes, and in particular relates to an adapting piece for water supply and drainage pipes of buildings and an installation method thereof. The adapting piece is characterized in that an upper adapting pipe is arranged above a cross slab; a lower adapting pipe is arranged below the cross slab; and the upper and lower adapting pipes are communicated with each other. The installation method comprises the following steps of: firstly reserving a reserved hole on the floor slab; secondly, during construction of a floor slab leveling layer, putting the adapting piece for water supply and drainage pipes of buildings in the reserved hole; thirdly, manufacturing a waterproof layer, directly paving the waterproof layer on the cross slab of the adapting piece for water supply and drainage pipes of buildings and then manufacturing a protective layer of the waterproof layer; and finally, fixedly connecting water supply and drainage pipes with the upper and lower ends of the adapting piece for water supply and drainage pipes of buildings. The adapting piece has a simple structure and an ingenious design concept, is fast and convenient to construct, saves time and labor, is convenient to maintain and is resistant to leakage.

The invention relates to a lightning rod mounting mechanism, comprising a bottom plate, a down-guide line and a fixing rod. The fixing rod includes a support tube and a connection tube mounted on thesame; the connection tube is provided with a connector connected with a lightning rod; the bottom plate includes a first mounting portion and a second mounting portion; the down-guide line is mountedon the bottom plate through the first mounting portion; the support tube is mounted on the bottom plate through the second mounting portion; the bottom plate is mounted on a lightning rod mounting ground through the first mounting portion; the down-guide line and the fixing rod are mounted on the ground along with the bottom plate. The lightning rod mounting mechanism has the advantages that the down-guide line is mounted on the bottom plate through the first mounting portion, the support tube is mounted on the bottom plate through the second mounting portion, the down-guide line, the supporttube and the bottom plate form a whole, and lightning rod installation space is optimized; the down-guide line is arranged on the bottom plate, setting a down-guide line during lightning rod mountingis not required, and lightning rod mounting efficiency is improved.

The invention discloses a split type water meter provided with a seal chamber. The water meter comprises a water meter mechanical body, a casing, an upper cover and a connecting piece, wherein an electronic component box and a battery box are arranged on the casing, the electronic component box comprises an electronic component case and a cover plate, the battery box comprises a battery case and a cap, the water meter mechanical body and the casing are connected through the connecting piece, the connecting piece is fixed above the water meter mechanical body through a screw, buckles are arranged on the inner side wall of the casing, and clamping grooves matched with the buckles are formed in the outer side wall of the connecting piece; the electronic component case and the cover plate are connected through ultrasonic welding to form the seal chamber. Compared with the prior art, the split type water meter has the advantages that the design of integral molding and clamping type connection is adopted, components are few, and the water meter is convenient to install and replace; the electronic component case and the cover plate are fixed through ultrasonic welding, so that water tightness and air tightness can be realized, and better waterproof and dustproof effects are realized.

The invention provides a safety type repairable and replaceable louver blade component. The safety type repairable and replaceable louver blade component comprises a connecting rod, a louver blades, blade covers, rotating shafts, springs and screws, wherein the blade covers are arranged at two ends of the louver blades; a rotating shaft hole is arranged in each blade cover; a rotating shaft is arranged in each rotating shaft hole; each spring is arranged between each rotating shaft and each rotating shaft hole; each rotating shaft can elastically pressed into each blade cover; the rotating shaft when be aligned to each rotating shaft hole on the edge frame of a shutter or a shutter curtain wall can be popped out and stretch into the rotating shaft hole on the edge frame for clearance fit; a nick used for the installation of a connecting rod is arranged at one end of each blade cover; when the louver blade is made of a solid material, the blade covers can be left out; and simultaneous rotation can be realized through a screw connecting rod and adjacent louver blades adjacent in a longitudinal direction. Compared with the conventional louver blades, the safety type repairable and replaceable louver blade component, disclosed by the invention, has the advantages of: 1, convenience for installation, 2, rapid repair and replacement; 3, safety, and 4, wide application range.

The invention discloses a cable which is convenient to detect, aiming at providing a cable for effectively detecting the condition of the cable. The advantages of that technical scheme are as follows,the cable includes an inner core, the outer layer of the inner core is wrapped with a protective layer, a detecting device is arranged on that protective layer, the detecting device comprises a firstsealing ring and a second sealing ring which are sealingly connected with the protective layer at both ends of the inner core, a detecting layer located between the sealing rings for wrapping the protective layer, a pressure air chamber located between the detecting layer and the protective layer, a test port located on the sealing ring and communicating with the pressure air chamber, a pressuredetector threadably connected with the test port, and a sealing gasket located on the test port.

The invention discloses an unmanned aerial vehicle for angling and aims to provide the unmanned aerial vehicle with a conveniently maintained and used retracting mechanism. The key point of the technical scheme is that the unmanned aerial vehicle comprises a shell, a plurality of arms, a battery mechanism and processor, a sonar mechanism and the retracting mechanism, wherein the shell is equipped with an upper half part and a lower half part; the arms are located on the upper half part; a motor and a paddle are arranged on each arm; the battery mechanism and processor is located between the upper half part and the lower half part; the sonar mechanism is fixedly connected with a rope; the lower half part comprises a mounting slot formed by an outer wall by inward sinking; the retracting mechanism is detachably jointed in the mounting slot; the retracting mechanism is connected with the rope and is used for driving the rope to displace, namely, the retracting mechanism is arranged on the outer side of the shell of the unmanned aerial vehicle; the retracting mechanism can be mounted or dismounted under the condition that the shell is not detached; the retracting mechanism can be quickly repaired and replaced, especially when the rope in the retracting mechanism is intertwined; and the use of the unmanned aerial vehicle is more diverse.

The invention discloses a structure detection device for ground flatness, and relates to the field of structure detection, and the device comprises a support frame, a portal frame is arranged on the support frame, a plurality of detection rods are vertically and slidably connected to the portal frame, and the plurality of detection rods are uniformly distributed along the length direction of the portal frame; idler wheels abutting against the ground are arranged on the periphery of the lower end face of the support frame, the lower end face of the detection rod is rotationally connected with adetection wheel abutting against the ground, a writing pen is vertically arranged on the upper end face, and a recording mechanism for the writing pen to write is arranged on the portal frame. The device has the following advantages and effects: through the arrangement of the high-automation detection device, the continuous detection and rapid detection of all positions on the ground are realized, so that the detection process is more time-saving and labor-saving, and the detection efficiency of the ground flatness is improved.

The invention discloses a step drill bit, and relates to the field of drill bits. The step drill bit comprises a clamping part, one end of the clamping part is sequentially provided with a first cutting part and a second cutting part, the diameter of the first cutting part is larger than that of the second cutting part, the clamping part, the first cutting part and the second cutting part are arranged in a split shape, multiple mounting rods evenly distributed in the circumferential direction of the second cutting part are arranged on the end face of the end, close to the first cutting part, of the second cutting part, mounting holes allowing the mounting rods to penetrate are formed in the first cutting part and the clamping part in a penetrating mode, and a locking mechanism used for fixing the mounting rods is arranged at the end, away from the first cutting part, of the clamping part. The step drill bit has the following advantages and effects that the modular step drill bit is arranged so that all parts of the step drill bit can be detached and replaced at will, and then the damaged parts can be independently maintained and replaced, and the resource waste is reduced.

The invention relates to a rapid self-elevating offshore platform lifting system and a control method thereof, belongs to the technical field of self-elevating offshore platforms, and solves the problem that the time cost for building, recycling and transferring a platform is high due to the fact that the speed of the whole process of a lifting system in the prior art is low. The pile leg lifting device comprises a pile leg and a lifting mechanism, the lifting mechanism comprises a phase change power device and a pile inserting push rod, the phase change power device is filled with phase change gas, and the air pressure generated by rapid expansion and pressure building of the phase change gas drives and pushes the pile inserting push rod to drive the pile leg to enter mud for ballasting to achieve rapid lifting of a platform. The lifting device is high in lifting speed and efficiency.

The invention discloses an L-shaped chlorine spraying absorber of an acid etching liquid recycling system. The L-shaped chlorine spraying absorber comprises a nozzle, an L-shaped feeding pipe, a one-way air inlet valve, a gas mixing pipe, a diffusion pipe and an auxiliary gas mixing device, the nozzle is fixedly arranged at one end of the L-shaped feeding pipe through a flange, and the one-way airinlet valve penetrates through and is fixed in the outer side of the L-shaped feeding pipe, the gas mixing pipe is fixedly arranged at one end, far away from the nozzle, of the L-shaped feeding pipe,and one end,far away from the l-shaped feeding pipe, of the gas mixing pipe is fixedly connected with the diffusion pipe. According to the L-shaped chlorine spraying absorber of the acid etching liquid recycling system, the L-shaped chlorine spraying and absorbing device is arranged, the chlorine can be efficiently absorbed and be mixed to recycle at the same time, the efficiency of chlorine recycle in the acid etching liquid recycling system is greatly improved., and meanwhile, the secondary utilization capability is improved; and the waste of the chlorine resources is avoided by direct secondary utilization.

The invention discloses a deflection wheel sorting unit, a deflection wheel sorting machine, a deflection wheel sorting system and a package supply system. The deflection wheel sorting unit comprises bottom plates, wherein a deflection seat is arranged on each bottom plate in a rotatable manner; an electric roller which locally protrudes out of the top of each deflection seat is arranged on the deflection seat; at least one clamping notch which linearly extends to the bottom surface from the top surface of each bottom plate is formed in each side of the bottom plate; and the projection of each deflection seat on the top surface of the corresponding bottom plate does not protrude out of the corresponding bottom plate. According to the deflection wheel sorting unit disclosed by the invention, each deflection seat is provided with an independent bottom plate, and the clamping notches are formed in the sides of the bottom plates, so that different deflection wheel sorting units can be assembled into a whole body through clamping blocks, the number of the deflection wheel sorting units can be flexibly adjusted according to actual application needs, and therefore, the length and the width of a conveying surface of the deflection wheel sorting machine are adjusted, the adjustability is better, and the flexibility is also better; and meanwhile, the electric rollers are adopted on the deflection seats, so that a complex driving structure is not needed, and the integral structure is simple.

The invention discloses a convenient-to-repair 3D printer. The 3D printer comprises a shell. The upper side of the shell is fixedly connected to an upper mounting base, and the upper mounting base isinternally provided with a tow feeding chamber of which the interior is fixedly connected to a first motor; the both sides of the first motor are each connected to a fixed rod fixedly, and the end, far away from the first motor, of each fixed rod is fixedly connected to the inner wall of the tow feeding chamber; and the output end of the first motor is fixedly connected to a rotating shaft of which one end is rotatably connected to the side wall of the tow feeding chamber, and the rotating shaft is fixedly connected to a tow feeding wheel. According to the 3D printer, through pulling of a fixed block, a second spring is elongated, till a clamping block is not limited by a limit rod, so that the clamping block is driven by a first spring in the extension state to move in a telescopic chute,and disengaged from a slot; thus, a plastic nozzle is removed directly, thereby assisting workers in performing maintenance and replacement more quickly.

The invention discloses a slope fixing device for a water conservancy project. The slope fixing device is composed of a plurality of stages of planting boxes distributed along a slope surface. The two adjacent stages of planting boxes are close to each other; highest box openings of the multi-stage planting boxes are flush with a horizontal plane on the slope surface; lowest box openings of the multi-stage planting boxes are flush with the horizontal plane of a drainage ditch located at the lower end of the slope surface; upper edge openings of box bodies of the planting boxes are parallel to the slope surface; the bottoms of the planting boxes are V-shaped; a partition plate is arranged in each planting box; each planting box is divided into an upper box body and a lower box body by the partition plate; the bottoms of the upper box bodies are communicated with the bottoms of the lower box bodies; and the upper box bodies and the lower box bodies are each provided with a plant planting layer, a filtering layer and a water permeable layer from top to bottom. The slope fixing device for the water conservancy project is simple in structure and convenient to quickly construct, mount, maintain and replace.

The invention discloses an electric hoist, and relates to the field of electric hoists. The electric hoist comprises an electric hoist body and a chain bag, wherein the chain bag comprises a mountingring; a pair of support frames are arranged side by side on the upper end surface of the mounting ring; a bag body is arranged below the mounting ring; a plurality of installation blocks are evenly arranged on the upper end of the bag body at intervals; mounting grooves for embedding of the installation blocks are formed in the lower end surface of the mounting ring; and locking mechanisms for fixing the installation blocks are arranged on the mounting ring. The electric hoist has the following advantages and effects that the separate disassembly and separate maintenance and replacement of thebag body are realized by arranging the modular chain bag, the whole chain bag does not need to be replaced, the maintenance cost is reduced, and the wasting of resources is also reduced.

The invention discloses an arrangement method of a reaction kettle steam drum and related pipelines. According to the arrangement method, a reaction kettle, a workshop operation platform walkway, a condenser and a storage tank or a metering tank, a public engineering pipeline, a steam drum and a steam drum valve group are reasonably arranged in a workshop; a reaction kettle jacket steam drum comprises two steam drums which are independently mounted in a staggered manner; the two independent steam drums are respectively an upper steam drum and a lower steam drum; the upper steam drum and the lower steam drum are connected with the public engineering pipeline through corresponding control valves or valve sets and corresponding connecting pipelines; the upper steam drum and the lower steam drum are arranged on the same workshop operation platform, the upper steam drum and the lower steam drum are arranged at a vertical or basically vertical angle with the workshop operation platform, andthe control valves or valve sets connected with the upper steam drum and the lower steam drum are arranged parallel or basically parallel to the workshop operation platform. The beneficial effects arethat: steam drum and related pipeline installation construction efficiency is high, cost is low, the steam drums and the valves are maintained and replaced quickly; the probability of misoperation ofthe valves can be greatly reduced; and frozen brine leakage is prevented and reduced.

The invention discloses an electric hoist, which relates to the field of electric hoists, comprising an electric hoist body and a chain bag, the chain bag includes a mounting ring, a pair of support frames are arranged side by side on the upper end surface of the mounting ring, and a bag body is arranged below the mounting ring; The upper end surface of the bag body is provided with a plurality of installation blocks evenly at intervals, the lower end surface of the installation ring is provided with installation grooves for the installation blocks to be embedded in, and the installation ring is provided with a locking mechanism for fixing the installation blocks. The present invention has the following advantages and effects: by setting the modularized chain bag, the bag body can be disassembled and individually maintained and replaced without replacing the entire chain bag, which reduces maintenance costs and waste of resources.

The invention provides a rapid maintenance and replacement system for a fan of an electrical cabinet, and belongs to the field of electrical cabinet matching maintenance. The rapid maintenance and replacement system involves a cabinet body, the fan and a maintenance vehicle; the fan is provided with connector racks, the cabinet body is provided with connector gears, and the fan is inserted and externally hung on the side surface of the cabinet body through the matching between the racks and the gears; an air channel is arranged inside the cabinet body, and airflow is guided into the cabinet body through the air channel for heat dissipation; the maintenance vehicle comprises a handrail and a vehicle plate, vertical rods are arranged on the vehicle plate, a supporting frame is slidably connected to the vertical rods, and maintenance vehicle racks matched with the connector gears are arranged at the front end of the maintenance vehicle; and when the fan of the electrical cabinet is maintained and replaced, a new fan is placed on the supporting frame, the maintenance vehicle is aligned with a fan connector of the cabinet body and pushed forwards, the maintenance vehicle racks act on the connector gears, the connector gears rotate to reversely push the old fan out of the cabinet body, the new fan descends and pushes the old fan away from the cabinet body, then the maintenance vehicle is pulled backwards, and the new fan is inserted into the cabinet body under the driving of the connector gears. The rapid maintenance and replacement system for the fan of the electrical cabinet can achieve rapid maintenance and replacement of the fan.