148results about How to "Smooth loading and unloading" patented technology

The invention relates to the technical field of lifting appliance application, in particular to rail freight hoisting equipment. The rail freight hoisting equipment comprises a rack, a height adjusting frame, a width adjusting frame, side frame plate assemblies, telescopic supporting plate assemblies and an auxiliary clamping assembly. The rail freight hoisting equipment has the advantages that when a container is hoisted, offset is avoided, and the rail freight hoisting equipment is suitable for long-distance transportation; and the upper face, the lower face, the left face, the right face, the front face and the back face of the container can be clamped, shaking is avoided, loading and unloading are stable, and the safety coefficient is high. The height adjusting frame is connected to the rack, and the middle end of the height adjusting frame is fixedly connected to the front end of the height adjusting frame. The left end and the right end of the width adjusting frame are in slidingfit connection with the two ends of the height adjusting frame correspondingly. Two side frame plate assemblies are arranged and symmetrically and fixedly connected to the left end and the right endof the width adjusting frame. Two telescopic supporting plate assemblies are arranged and are symmetrically arranged on the outers sides of the lower ends of the two side frame plate assemblies.

The invention discloses an independent weight adding force standard machine and an independent weight adding method, which belong to the technical fields of quality standard and measurement. The independent weight adding force standard machine comprises a main stand and a weight hanger, nine weights and nine groups of motion mechanisms are longitudinally arranged layer by layer in the main stand, and each group of motion mechanism comprises two pairs of supporting corners, a pair of brackets, a pair of servo motors, a pair of speed reducers and a pair of worm gear pairs; each servo motor is sequentially connected with each speed reducer, each worm gear pair and each bracket, a pair of force sensors is arranged on each bracket, and a weight is placed on each pair of brackets. In the independent weight adding method, each servo motor drives the brackets and the weights placed at the upper surfaces to move up and down through each speed reducer and each worm gear pair. The weights are rapidly and steadily added and unloaded, thereby realizing the maximum loading series and enlarging the use measuring range of the detected sensor; the control method and processes are simple, and the energy saving effect is remarkable.

The invention discloses an automobile press fit die transmission and positioning mechanism, which comprises a positioning plate mounting plate, an assembly transportation positioning plate, a lifting jack and a fixing device, wherein the top surface of the positioning plate mounting plate is vertical to the stamping direction of an automobile press fit die; the assembly transportation positioning plate is mounted on the top surface of the positioning plate mounting plate and faces to a stamping piece in the automobile press fit die; the distance between the assembly transportation positioning plate and the stamping piece is adjustable; the lifting jack is capable of jacking and dropping down the positioning plate mounting plate and the assembly transportation positioning plate; the fixing device is used for fixing the lifting jack. According to the automobile press fit die transmission and positioning mechanism, the height direction and the horizontal direction of the stamping piece transportation positioning mechanism are adjustable, the loading and the discharging of the stamping piece are more stable and safer, and the space is saved; the adjustable positioning mechanism is adopted, the problem that the positioning mechanism intervenes with a press fit cutter block mounting seat and an upper die under the existing die height is solved, and the die height is reduced to 1000 mm, and therefore, the mixed routing manufacturing of different products is realized, the casting cost is reduced, the tool development expense is reduced, and the processing, the detachment, the debugging and the production are facilitated.

Provided are a cap (1) which can improve the sealing property of a container and which is suitable for use in the case where the internal pressure of the container is high such as the case where the content of the container is carbonated beverage, and a container (2) with the cap. The cap comprises a cap body (4) which has a top wall (6) and a skirt wall (7) drooping from the outer periphery of the top wall (6) and in which a female screw (9) which is fit to a male screw (10) of an opening (3) of the container is formed in the skirt wall (7), and a composite resin packing (5) for sealing the opening (3) of the container. The packing (5) comprises a top plate (17) which comes into contact with the leading end portion of the opening (3) of the container and with which the end portion is covered, and a circular inner foot (18) which droops from the top plate (17) and which is adhered to the inner periphery surface of the opening (3) of the container. Further, a circular bending portion (19) which bends downward relative to the top plate (17) and with the inner periphery surface of which the outer periphery surface of the opening (3) of the container is covered is provided in continuous with the outer periphery edge of the top plate (17). Further, the cap body (4) comprises an urging portion (21) for urging the outer periphery surface of the bending portion (19) of the packing (5)in a closed state and the bending portion (19) urged is elastically transformed to be pushed to the outer periphery surface of the opening (3) of the container.

The embodiment of the present disclosure discloses a system and a method for loading and unloading a cassette. The system for loading and unloading the cassette comprises: a lifting device configured to vertically ascend and descend between a first height and a second height; a first conveying device mounted in the lifting device and configured to move the cassette in a horizontal direction; a second conveying device mounted at the first height and configured to move the cassette in a horizontal direction; a third conveying device mounted at the second height and configured to move the cassette in the horizontal direction; a plurality of first position sensors configured to detect a position of the lifting device; and a control device configured to control ascending and descending of the lifting device, and adjust a further rising or falling of the first conveying device in the lifting device based on an initial stop position of the lifting device detected by the first position sensor such that the first conveying device is aligned with the second conveying device at the first height, or is aligned with the third conveying device at the second height. The conveying device of the lifting device and the conveying device on the platform are capable to accurately align with each other so as to achieve the smooth loading and unloading of the cassette.

The invention discloses an assembling highway steel bridge transporting and erecting vehicle which comprises a goods shelf, a pedal, an oil cylinder base, an oil cylinder and a handle. A vertical plate is fixed on the goods shelf, a top plate is fixed on the vertical plate, and the vertical plate is connected with the oil cylinder base through a left A connection sheet and a right A connection sheet. The oil cylinder comprises a large plunger and a small plunger, wherein the large plunger is connected with the top plate, and the top end of the small plunger is contacted with the bottom end of the handle. A back wheel is arranged at the lower end of the oil cylinder base, and a universal wheel is arranged on each of two sides at the front end of the goods shelf. The universal wheels are connected with a front wheel cross plate, the front end of the front wheel cross plate is hinged to a front wheel front frame, the front wheel front frame is hinged to a front wheel support seat disposed at the bottom at the front end of the goods shelf, the back end of the front wheel cross plate is hinged to a front wheel back frame, and the front wheel back frame is hinged to the goods shelf. A pivot point of the pedal is hinged to the back end of the goods shelf, and the pedal is connected with the vertical plate or the top plate through an A spring. The assembling highway steel bridge transporting and erecting vehicle can solve problems of large labor intensity and long time wasted on member connection and transport due to pure manual operation, and buys time for emergent campaign of our military and rescue and relief.

The invention discloses a mechanical arm device of a centerless grinding machine, which comprises a supporting plate, a bracket fixed on a main machine rack, a hydraulic cylinder fixed on the lower part of the bracket, a pair of guide pillars fixed on the upper part of the bracket and a lifting seat for driving the pair of guide pillars to slide by a piston rod of the hydraulic cylinder. A pair of mechanical arms for arranging work pieces on the supporting plate is arranged on the lifting seat. The thicknesses of the lower parts of the two mechanical arms are smaller than that of the work piece. An elastic pressure plate component is arranged between the two mechanical arms on the lifting seat. The device has a simple structure; and the pair of mechanical arms supports the two ends of each work piece to realize loading and unloading, and is driven by the hydraulic cylinder, so that the loading and unloading are more stable and accurate and entire-shaft profiling can be realized. The device solves the problem that the conventional centerless grinding machine cannot machine a combined slender shaft consisting of a plurality of concentric cylinders with different diameters, and compared with the conventional device utilizing ordinary external grinding, improves the machining accuracy and reduces the rejection rate.

The invention relates to a configuration method and a configuration system of a storage yard operation device. The configuration method of the storage yard operation device includes the steps of obtaining identification and sequence of the operation device entering a storage yard, redistributing orders to each operation device according to the sequence of the operation device, centrally selecting reservation number orders according to reservation arrangement and correspondence between the identification of the operation device arrayed according to the order identification sequence and the orders, respectively calculating box falling number corresponding to each order in the reservation number orders, selecting the order with the minimum box falling number in the reservation number orders, and building corresponding relationship between the order with the minimum box falling number and the identification of the operation device. Due to the fact that the operation device corresponding to the previous order does not need to be waited for when the operation device entering the storage yard is inconsistent with the order sequence, the configuration method and the configuration system of the storage yard operation device has the advantages of reducing waiting time and the box falling number and improving operation efficiency.

The invention discloses a container wharf operation and management method. Fields of the method comprise a wharf front edge, a buffering region, a pit road and a storage yard; a shore side bridge crane is arranged on the wharf front edge, and the buffering region is provided with horizontal lifting equipment; the pit road is provided with a collection card; and the storage yard is provided with a storage yard gantry crane. The method comprises box unloading operation, box loading work and outer card collection work; when the shore side bridge crane carries out box unloading operation, the shore side bridge crane places cargoes in the buffering region; when a free collection card arrives, a container is placed on the collection card through the horizontal lifting equipment to finish the whole box unloading task operation; when the box loading work is carried out, the collection card directly places the container on the buffering region after reaching to the wharf front edge, and then leaves away; and when the shore side bridge crane comes to take the container, the horizontal lifting equipment is used for transporting the container to the position needed by the shore side bridge crane. According to the container wharf operation and management method, under the condition of increasing the least cost of the existing container wharf, the loading / unloading efficiency of a container task is improved, and the operation difficulty of wharf workers is reduced at the same time.

The invention discloses a separable forklift device for high platform compartment loading and unloading work. The device comprises a scissors fork type hydraulic lifting platform and an overturning type portal forklift. The hydraulic lifting platform comprises a forklift carrying table, a bottom frame, a hydraulic mechanism, a lifting mechanism, a walking mechanism and an electronic control device. The portal forklift comprises a moving forklift body and a portal assembly, a limiting device matched with the portal forklift is arranged on the hydraulic lifting platform, and power devices of thelifting platform and the portal forklift can supply power separately and independently and can also combined to supply power integrally. The portal assembly comprises an outer portal, an inner portaland a sliding frame installed on the inner portal, a cargo fork is installed on the sliding frame, and an overturning mechanism is connected between the portal assembly and the moving forklift body.According to the device, the forklift carrying table of the hydraulic lifting platform and the inner bottom plate face of a compartment are located at the same horizontal height, loading and unloadingof cargoes can be carried out with the compartment maintained in the high platform state, and the power devices of the portal forklift and the lifting platform can be combined into one when the portal forklift is limited on the lifting platform.

Disclosed is a container crane apparatus. The container crane apparatus comprises: a steel frame structure having an arm extending over a container vessel; a main trolley for moving back and forth along the arm and loading and unloading containers onto / from the container vessel; a vertically moving unit for elevating containers in conjunction with the main trolley; a horizontally moving unit for intermittently conveying containers horizontally in conjunction with the vertically moving unit; and a sub-trolley for loading and unloading containers onto / from a container-conveying trailer in conjunction with the horizontally moving unit.

The invention provides an unpowered goods shelf and a goods transportation device. The unpowered goods shelf can be in butt joint with equipment, The goods transportation equipment comprises a secondconveying track and a third gear, the second conveying track is used for transferring goods, the third gear can synchronously rotate under the driving of the second conveying track; and the unpoweredgoods shelf comprises a goods shelf body, a first conveying track and a first gear, the first conveying track is installed on the goods shelf body and can be in butt joint with the second conveying track of the equipment, the first gear can drive the first conveying track to run during rotation, and the first gear can be meshed with the third gear when the first conveying track is opposite to thesecond conveying track. According to the unpowered goods shelf and the goods transportation device, the power of the equipment is directly borrowed to drive the conveying track on the goods shelf, sothat loading and unloading are complete.

The invention relates to artificial board cold pressing and formation and unloading circulation equipment. According to the artificial board cold pressing and formation and unloading circulation equipment, slab cold presses, a drying tunnel kiln and pressure relief machines are circularly arranged in series through a guide rail of a circulation pressure-maintaining car, and the circulation pressure-maintaining car circulates among the slab cold presses, the drying tunnel kiln and the pressure relief machines through the guide rail of the circulation pressure-maintaining car; a slab loading unit is arranged in front of the slab cold presses, and a board unloading unit is arranged behind the pressure relief machines; slabs are stacked in the circulation pressure-maintaining car, the artificial board cold pressing and formation and unloading circulation equipment can achieve an automatic locked pressure maintaining function after the slabs enter the slab cold presses, the slabs can be moved out in time or maintain pressure for a drying formation working procedure, and therefore the artificial board cold pressing and formation and unloading circulation equipment achieves fully mechanical automatic circulation of cold pressing, formation and unloading of the slabs and is 12 times higher than manual fastening pressure-maintaining efficiency; in the production process, the artificial board cold pressing and formation and unloading circulation equipment can simultaneously produce 10-40 layers of slabs at a time, products are even in density, good in strength and not prone to warping deformation, and the purposes of energy conservation and high efficiency are really achieved; the artificial board cold pressing and formation and unloading circulation equipment is particularly suitable for efficiently producing magnesite boards and high-strength mineral boards.

A trailer for transporting a speed boat relates to a trailer to solve the problems that the conventional trailer can only transport one speed boat to cause inconvenience in use and a vehicle door frame is used to fix the speed boat in the trailer to cause inconvenience in loading and unloading. The trailer for transporting the speed boat comprises a trailer body, an upper bracket, a lower bracket, a front assisting mechanism and two sets of lifting mechanisms, two lower cross beams are respectively connected with a front axle and a rear axle and are respectively perpendicular to the front axle and the rear axle, a connection cross beam is installed between two vertical beams, the upper bracket comprises an upper wheel carrier, four guide mechanisms and six groups of regulation wheel carriers, the upper wheel carrier comprises two cross bars and three upper support rods, the lower bracket comprises three lower support rods and six groups of regulation wheel carriers, each group of the regulation wheel carrier comprises a carrier seat, a connection rod and three roller sets, one set of lifting mechanism is installed on each of vehicle frames at the two ends of the rear axle, and the front assisting mechanism comprises an assisting frame, an upper winch and a lower winch. The trailer provided by the invention can be used for transporting the speed boat.

The invention discloses an automatic lifting type assembling highway steel bridge transporting and erecting vehicle which comprises a base, wherein an electric control box and a handrail are arranged at the back end of the base, a lifting goods shelf is arranged on the upper surface of the base, and a motor used for starting the lifting goods shelf is arranged in the base and is connected with the electric control box through a lead wire. The automatic lifting type assembling highway steel bridge transporting and erecting vehicle leads equipment loading and unloading to be simple, convenient, efficient, safe, fast, accurate and stable, and accordingly remarkably improves operation efficiency and saves various resources; and achieves mechanization of truss transporting and splicing, solves problems of large labor intensity and long time wasted on member connection and transport due to pure manual operation, and buys time for emergent campaign of our military and rescue and relief.

The invention relates to the technical filed of packaging, in particular to food packaging equipment which comprises a rack, a conveying mechanism, a leveling mechanism and an adhesive sealing mechanism. The conveying mechanism comprises a motor, a conveying belt and at least two gears. The leveling mechanism comprises two extruding sections symmetrically arranged above the conveying belt. Each extruding section comprises a fixing support, an extruding roller used for extruding the side faces of a carton, and a leveling roller used for closing a cover of the carton. The adhesive sealing mechanism comprises anadhesive tape roll, an oscillating rod, a sliding block and a pull blade used for pulling the adhesive tape on the adhesive tape roll to the center line of the top covered by the leveling rollers, of the carton. The rack is fixedly connected to a cutting knife used for cutting the adhesive tape. According to the technical scheme, a gap between the two opposite carton covers of thetop of the carton is prevented effectively.

A tape cartridge or the like which can be pulled out of a cartridge loading section while maintaining a loading posture is to be provided. A tape cartridge is configured to be able to be loaded in and unloaded from a tape printing device. The tape cartridge includes a tab portion which is gripped at least at the time of unloading. The tab portion is arranged at or near a position where pull-out resistance due to unloading is balanced within a plane intersecting with an unloading direction.

The invention discloses a two-wheel vehicle parking fixing device for a stereo garage. The two-wheel vehicle parking fixing device for the stereo garage comprises a bearing plate, a wheel fixing device, a power input device, a vehicle body fixing device and a controller, wherein the bearing plate is used for a two-wheel vehicle to be parked and also serve as an installation base of other components; the wheel fixing device is arranged in a square groove in the bearing plate and is used for fixing a front wheel of the two-wheel vehicle and preventing the vehicle from moving front and back; thepower input device is arranged on the left side of the bearing plate and is used for transmitting power and providing power for the vehicle fixing device; the vehicle body fixing device is arranged atthe head end of the bearing plate and is used for fixing a handlebar part of the two-wheel vehicle and preventing the vehicle from waggling; the controller is arranged on the bearing plate and is used for controlling a motor to rotate. The two-wheel vehicle parking fixing device disclosed by the invention has the advantage of simple structure, small land occupation, orderliness and attractivenessin vehicle storage, safety, stability, practicability, labor saving and simpleness in loading and unloading vehicles and suitability for storing varieties of types of vehicles.

A load / unload-type head suspension is capable of suppressing frictional coefficient variations. The head suspension has a head and a tab that is slid and guided along a ramp block in a read / write apparatus, to move the head away from a hard disk to a retract position. The tab is provided with microscopic irregularities to suppress frictional coefficient variations when the tab is guided along the ramp block. A center line average roughness (Ra) of the microscopic irregularities being greater than 0.2 μm or smaller than 0.6 μm.

The invention discloses a loading / unloading device. The loading / unloading device comprises a baseplate and an oil cylinder I; an extension rod of the oil cylinder I is hinged with one side of a belt baseplate; a shell of the oil cylinder I is hinged to the baseplate; the baseplate is hinged to the other side of the belt baseplate; rollers are respectively arranged at two ends of the belt baseplate, and are respectively a roller I and a roller II; the roller I and the roller II are connected through a belt; multiple support roller devices are spaced between the roller I and the roller II under the belt; the roller 1 realizes rotation through a motor; multiple baffle plates are spaced on the belt; and a blanking plate is mounted at a discharge end of the belt baseplate. The loading / unloading device is simple in structure and liable to operate, can be more stable in loading and unloading of goods, conveniently and quickly places the goods in containers, shortens the carrying time, and improves the carrying efficiency.

A load / unload-type head suspension is capable of suppressing frictional coefficient variations. The head suspension has a head and a tab that is slid and guided along a ramp block in a read / write apparatus, to move the head away from a hard disk to a retract position. The tab is provided with microscopic irregularities to suppress frictional coefficient variations when the tab is guided along the ramp block. A center line average roughness (Ra) of the microscopic irregularities is set to be in the range of 2 μm and 0.6 μm.

The invention relates to an air conditioning system water chilling unit operation control method and device and an air conditioning system, and belongs to the technical field of air conditioning control. The method comprises the steps that whether operation of the air conditioner system meets a preset loading condition or a preset load shedding condition is judged; if the loading condition is met,according to a first control strategy, an unoperated water chilling unit and channel equipment of the unoperated water chilling unit are selected, starting control is carried out on the selected unoperated channel equipment, and then a starting instruction is issued to the selected unoperated water chilling unit; and if the load shedding condition is met, the running water chilling unit and the channel equipment of the running water chilling unit are selected according to a second control strategy, a shutdown instruction is issued to the selected running water chilling unit, and then closingcontrol is carried out on the selected running channel equipment. By means of the air conditioning system water chilling unit operation control method and device and the air conditioning system, energy-saving and stable operation can be advantageously achieved while refrigeration of the air conditioning system is met.

The invention discloses a high-efficiency wafer box conveying device of wet cleaning equipment. The device comprises a wafer output mechanism, a wafer receiving mechanism, a transfer mechanism and a mechanical clamping mechanism, one end of the transfer mechanism is connected with the receiving mechanism, and the mechanical clamping mechanism is arranged at the other end of a transfer rail and comprises a transverse moving mechanism, a lifting mechanism, a clamping mechanism and a rack, and the transverse moving mechanism and the lifting mechanism are both installed on the rack; the transverse moving mechanism comprises a rotating air cylinder, a driving gear and a driven gear, the rotating air cylinder is installed on the rack, the output end of the rotating air cylinder is connected with the driving gear, the driving gear is connected with the driven gear through a conveying belt, and all process areas of the wafer cleaning equipment are connected through a rack. The driven gear is connected with the rack in a meshed mode. The conveying device is compact in structure, a new clamping mechanism is not introduced, the wafer box conveying process is simple, the wafer cleaning efficiency is improved, and the manufacturing cost of wet cleaning equipment is saved.

The invention discloses a transportation vehicle hydraulic system which comprises an oil supply loop, a synchronous lifting unit, a supporting leg unit and a clamping unit; and the oil supply loop issequentially provided with the synchronous lifting unit, the supporting leg unit and the clamping unit in a shunting manner. The transportation vehicle hydraulic system provided by the invention can ensure that four sets of lifting mechanism perform synchronous running in the hydraulic bracket disassembly process so as to ensure smooth and steady disassembly of a hydraulic bracket. Meanwhile, in the hydraulic system, a balance loop is used, and running of a hydraulic lifting system is ensured to be safe; and beyond that, a balance valve forms a certain backpressure in the lifting system so asto perform regulation on a speed, the smoothness of work of the hydraulic lifting system is guaranteed, and the problems that glide of a piston of a hydraulic cylinder is generated caused by leakage of a pipeline and a valve and the like are avoided.

The invention provides a clip which can hold papers at the surface side of a plate type object and also can hold stated small objects in a manner of hook-hanging or suspension-hanging. The clip (12) is arranged on an edge component (11) which is arranged along the end of the plate type object (10). The clip (12) comprises a first holding component (15) and a second holding component (16) positioned at the front side and the back side of the plate type object (10) and hook-hung on the edge component (11); a connection element (17) which is connected with the opposite sides (15A and 16A) of the first holding component (15) and the second holding component (16); noses (19 and 19) which are respectively arranged on the opposite sides (15A and 16A) and are contacted with each other; a hook part (20) which is heaved from the surface of the first holding component (15); and a pressing part (21) which is arranged on the first holding component (15) and which can press papers (P) on the plate type object (10).

The invention discloses full-automatic sterilizing equipment. The equipment comprises an automatic feeding mechanism, a sterilization mechanism and an automatic discharging mechanism, wherein the sterilization mechanism comprises a horizontal tank, a feeding box and a material conveying device, a feeding / discharging port is formed in the lower part of one end of the tank, the feeding box is connected at the feeding / discharging port of the tank in a sealed manner, a horizontal partition plate higher than the peak position of the feeding / discharging port is arranged in the tank, the partition plate divides an inner cavity of the tank into an upper cavity and a liquid seal cooling cavity, via holes are formed in two ends, close to the tank, of the partition plate respectively, and a feeding port of the feeding box is higher than the partition plate; a plurality of steam inlet valves and at least one pressure and temperature sensor are arranged on the inner wall of the top of the tank, a water inlet controlled by a water inlet valve and a water outlet controlled by a water outlet valve are arranged at the bottom of the tank, and a temperature sensor is arranged in the liquid seal cooling cavity of the tank. The full-automatic sterilizing equipment is applicable to various materials packaged in a sealed manner.

The invention belongs to the technical field of machines, and provides an automatic feeding and discharging device of a type rolling machine. The device comprises a drive element, a drive element installation support, a limiting mechanism, a feeding mechanism, a reset mechanism and a discharging mechanism. The drive element controls the feeding mechanism and the discharging mechanism to move up and down in a reciprocating mode, the feeding mechanism and the discharging mechanism are rotationally connected, the feeding mechanism is connected with the drive element installation support in a sliding mode through the limiting mechanism, and the reset mechanism controls the discharging mechanism to return to the original position. By means of the arrangement of the feeding mechanism and the discharging mechanism, feeding and discharging are combined in the type material rolling process, time is saved, the work tact of the type rolling machine is reduced, materials can be pushed to be discharged through the discharging mechanism, the discharging mechanism also has a certain bearing function on the materials to be machined, discharging is accurate, consumed time is short, and efficiency is high; by means of the arrangement of the limiting mechanism and the reset mechanism, it is guaranteed that the automatic feeding and discharging device is safe, stable and high in reliability in the feeding and discharging processes.

The embodiment of the present disclosure relates to a system and a method for loading and unloading a cassette. The system comprises: a lifting device vertically moving between a first height and a second height; a first conveying device in the lifting device to move the cassette horizontally; a second conveying device to move the cassette in horizontally; a third conveying device to move the cassette horizontally, a plurality of first position sensors to detect a position of the lifting device; and a control device to control vertical movements of the lifting device, and adjust further movements of the first conveying device in the lifting device based on an initial stop position of the lifting device such that the first conveying device is aligned with the second conveying device at the first height, or is aligned with the third conveying device at the second height.

The invention relates to a novel furnace door structure of a walking beam heating furnace, which comprises rectangular vertical beams and rectangular cross beams, wherein the rectangular vertical beams and rectangular cross beams form a rectangular framework. The invention is characterized in that intermediate posts are embedded and distributed in the rectangular framework, the rectangular framework are divided into containing spaces by the intermediate posts, a furnace casing steel block is arranged in each containing space, every two adjacent furnace casing steel blocks are not in contact with each other, and an expansion space is reserved between every two adjacent furnace casing steel blocks. When in use, because the overall structure of the furnace door is composed of the furnace casing steel blocks, each block can be expanded freely in own reserved expansion space when being heated, thereby effectively preventing the overall structure of the furnace door from deformation after being heated and ensuring that the furnace door can smoothly finish charging and discharging operations.