44results about How to "Avoid vertical" patented technology

The present invention relates to a blast furnace chute distributor that controls the obliquity of the rotating chute via the resultant motion of rotation and rectilinear motion for the advisable distribution on the burden surface. This blast furnace chute distributor mainly contains: box body, top cover, hollow throat, upper slewing ring, turning sleeve, trunnion, crank, crank tail drum, chute bracket, chute, frame, lower slewing ring, support ring, guide rail, drive device of horizontal rotation, digital servo cylinder. One or three digital servo cylinders are combined with the steel wire rope, pulleys, parallel ruler, lever and guide rail to realize the vertical translation of the support ring controlling the chute obliquity. Via the blast furnace chute distributor driven by the digital servo cylinders, the structure is simplified and the accuracy is enhanced. The effect is similar with transmission by steel wire ropes but the setting and debugging are much more convenient.

The invention provides a construction method for newly-built large deep foundation pit basements under a protection building. According to the construction method, on the premise that the protection building is not disassembled, within a limited foundation range, a mature building translation technology and a reverse foundation pit construction method are combined, and overall construction of the first-region and second-region basements is directly performed after the protection building and a top plate of the first-region basement are connected in an anti-seismic butt joint mode. On the basis of guaranteeing structural stability of the protection building, construction working conditions and construction steps of the basements are reduced, the construction period is shortened, safety and stability of the protection building are improved, overall construction quality and efficiency are improved, ambient environment is effectively controlled, the number of dividing strips between first and second regions is reduced, and time benefits, space benefits and stable benefits are maximized.

The invention relates to a hydraulic pile driver for highway guardrails. The hydraulic pile driver for the high-way guardrails comprises a pile frame, a four-wheel chassis for supporting the pile frame, a hydraulic hammer, a hinge type sliding frame driving the hydraulic hammer to slide on the pile frame and a stretching and retracting mechanism which is arranged on the four-wheel chassis and used for driving the pile frame to longitudinally and transversely swing for adjustment on the horizontal plane. The pile frame comprises a connecting plate, a swing arm, an upper guide rail, a lower guide rail, a swing arm oil cylinder and a guide rail oil cylinder. One end of the swing arm is hinged to the upper end of the connecting plate, and the other end of the swing arm is hinged to the hinge type sliding frame. The upper end of the lower guide rail is hinged to the upper guide rail. The lower end of the lower guide rail is hinged to the stretching and retracting mechanism. The hinge type sliding frame is matched with the lower guide rail in a matched manner. The upper end of the swing arm oil cylinder is hinged to the middle of the swing arm. The lower end of the swing arm oil cylinder and the lower end of the connecting plate are hinged to the stretching and retracting mechanism together. The upper end of the guide rail oil cylinder is hinged to the upper guide rail, the lower end of the guide rail oil cylinder is hinged to the stretching and retracting mechanism, and therefore the upper guide rail and the lower guide rail are driven by the guide rail oil cylinder to ascend and descend.

The invention discloses a control method for an air conditioner. The control method comprises the following steps: starting the silent mode of the air conditioner; detecting the noise value of the air conditioner at each air-guide angle by using a noise detection device; controlling an air-guide component to guide air in at least a part of a corresponding air-guide area with a noise value smaller than preset noise. By adopting the control method for the air conditioner according to the embodiment of the invention, high refrigerating efficiency is achieved, noise can be lowered effectively, and user experience is improved. The invention further discloses a control system for the air conditioner and the air conditioner.

The invention discloses a tubular centrifuge and a method thereof for keeping balance of a rotating drum. The tubular centrifuge comprises a frame, the rotating drum and a driving device; the driving device is arranged on the frame, is connected with the rotating drum, and is used for driving the rotating drum to rotate around the axis of the rotating drum in the vertical direction; an induction device is used for monitoring if the rotating axis of the rotating drum is deviated from the vertical direction and generating a rotating drum position signal when monitoring that the rotating axis of the rotating drum is deviated from the vertical direction; and a magnetic return device is fixed on the frame, is connected with the rotating drum, is connected with the induction device, receives the rotating drum position signal, and drives the rotating drum to enable the rotating axis of the rotating drum to return to the vertical direction according to the rotating drum position signal. The tubular centrifuge can effectively guarantee the rotating axis of the rotating drum to be always in the vertical direction, enables the rotating drum to keep the balance state, and effectively guarantees stable operation.

The invention discloses a mounting method for a sill anchor combined support frame for a steel structure shear wall and an outer frame column base of a super high-rise building. The method comprises the following steps of: S1, paying off at the position of the sill anchor combined support frame after civil foundation bed construction is finished; S2, mounting a transition rack at a proper position; S3, assembling an anchor bolt stock, an anchor bolt and an anchor bolt penetrating rack into an anchor bolt component, and placing the anchor bolt component on the transition rack; S4, preserving slot templates on a steel plate wall or a steel column foot base anti-shear component; S5, performing a primary calibration on the perpendicularity, the planimetric position and the anchor bolt top elevation of the overall anchor bolt component; S6, performing a secondary calibration on the perpendicularity and the elevation of the anchor bolt in the anchor bolt component before pouring concretes; and S8, pouring building foundation concretes. The mounting method has the advantages of assembling the sill anchor combined support off site so as to reduce in-site cross operation, flexibly adjusting the sill anchor combined support according the practical situation on site, greatly improving the construction efficiency and the like.

The invention belongs to the technical field of tools for a water pump, and particularly relates to a water pump shaft structure. The water pump shaft structure comprises a smooth end and a spline tooth end which is formed in a one-off mode through an extruding and drawing process. Multiple outer teeth are arranged on the outer wall of the joint of the smooth end and the spline tooth end. An impeller locating sleeve is arranged at the joint of the smooth end and the spline tooth end. Inner teeth which are located at the center and formed in a one-off extruding and drawing mode are arranged on the inner wall of the impeller locating sleeve. The inner teeth are matched with the outer teeth. The water pump shaft structure has the advantages that the strength of the pump shaft can be guaranteed, the parallelism and the strength of locating of an impeller can also be guaranteed, the machining time is shortened, and the process is simple and rapid.

The invention provides an integrated concrete pile tip and a manufacturing method thereof. The product mainly solves the problems that the conventional hollow square pile is difficult to sink, difficultly passes through a hard interlayer and a frozen soil layer and the like. The integrated concrete pile tip is divided into an integral type integrated concrete pile tip and an assembling type integrated concrete pile tip, wherein in the integral type integrated concrete pile tip, a pile tip part and a pile body can be manufactured together through centrifugal molding; and in the assembling type integrated concrete pile tip, the pile tip part is manufactured first and then is connected with the pile body into a whole. A prestressed steel bar runs through the axis direction of the integrated concrete pile tip; the integral type integrated concrete pile tip is applied with prestressing force by a pretensioning method; and the pile body part of the assembling type integrated concrete pile tip is applied with prestressing force by the pretensioning method and the pile tip part of the assembling type integrated concrete pile tip is applied with prestressing force by a posttensioning method. Compared with the common hollow square pile, the product saves one end plate and responds to the national call for energy conservation and emission reduction. The product has the advantages of improving the whole structural strength of the pile body, overcoming the defects that the pile body is not vertical and is displaceable, a pile material is damaged and fractured and the like, obviously improving pile-forming quality and the like.

The invention discloses a bicycle. The structure thereof is based on the original bicycle which comprises a frame, pedals, wheel shafts fixed on the frame and a seat connected with the wheel shafts, and leads the rider to save labor by utilizing the weight of the bicycle body and directional conversion of force, and the structure is applicable to various bicycles and three-wheel vehicles and the like. The supporting mode of the seat is improved to be a front support and a rear support; a front supporting point is fixed on the frame (8), a rear supporting point is connected on the upper end (1) of a supporting rod and the lower end thereof is connected with the frame (2); as the supporting rod (3) is supported in an inclined manner, the seat is pressed to lead the frame (2) to produce a forward force. The front end of a rear clothes (articles) frame is connected with the frame (9) or (4), the rear end thereof is connected with the frame (9) or (4) by a supporting rod (6) and a central shaft (5) of the bicycle moves backward to be in the range of the front and the rear of the vertical line of the center of the gravity of the seat and has two modes of front and back adjustment or being fixed without adjustment. A rear wheel shaft is fixed on a special position of the frame (10).

The invention discloses a spatial cable suspension bridge main cable construction assisting device. The spatial cable suspension bridge main cable construction assisting device comprises spatial cablefixing brackets and main cable strand wire temporary fixing devices, wherein a transverse support and two longitudinal supports are arranged on each spatial cable fixing bracket; the top ends of thelongitudinal supports are connected with the transverse support to form a trapezoid; the bottom ends of the longitudinal supports are connected with a main bridge steel box girder; the longitudinal supports are positioned on a spatial cable design plane of a main cable; the main cable strand wire temporary fixing devices are arranged at the upper parts of the two sides of the spatial cable fixingbrackets; each main cable strand wire temporary fixing device comprises an external sleeve, a plurality of locating cable clips and a connecting plate; a main cable strand wire penetrates through thelocating cable clips; the adjacent locating cable clips are spliced with each other within the same plane; the adjacent locating cable clips are connected with each other through connecting plates; the twisting of the main cable can be effectively prevented; the phenomena that the internal and external stresses are not balanced and the safety stock of the main cable is reduced due to the wire swelling phenomenon generated in the main cable mounting process are avoided; and the phenomenon that a spatial sling cannot enter a hole or is not perpendicular to the anchoring surface can be avoided.

A lifting system for vertical adjustment of a transportation system structure consists of a foot that is fastened onto the transportation system structure and a foot cradle. The foot is bounded on opposite sides by two foot surfaces that are arranged at a foot-surface angle to each other. The foot cradle has two complimentary supporting surfaces against which the foot surfaces rest. The supporting surfaces are vertically movable, allowing the foot and transportation system structure to be raised or lowered, and the vertical adjustment thereby takes place.

The invention relates to a hog house vertical ventilation system. The system comprises an air inlet formed in the outer wall of a pig house and a plurality of ventilation windows arranged at a ceilinginside the pig house, and the air inlet is communicated with the ventilation windows through an air supply pipe; an air deflector is installed at an air outlet of each ventilation window, and air flow blown from the ventilation windows is steered by the air deflectors and blown into the pig house in the direction forming the acute angle with the direction of gravity. According to the vertical ventilation system, on the basis of ensuring that airflow perpendicularly flows from the ceiling to a leakage plate, the phenomenon that the air flow directly flows to pigs vertically is avoided, the pigcomfort is improved, and diseases are avoided.

The invention mainly discloses a central venous pressure measurement scale which is of a transparent structure with an interlayer filled with liquid for indicating the horizontal position. The volume of the liquid is no more than two thirds of that of the interlayer. A clamping groove for clamping an infusion tube is arranged on the measurement scale along the length direction of the measurement scale, and scales for measuring venous pressure are formed on the side of the clamping groove. The measurement scale is arranged on a bottom rack which comprises a base and supporting rods perpendicularly arranged at two ends of the base. Two sides of the measurement scale in the width direction are rotatably connected with the supporting rods through rotary shafts, and the measurement scale keeps perpendicular in a free state by means of the positions of the rotary shafts. By means of the horizontal principle, the central venous pressure measurement scale can measure patients' central venous pressure accurately, and is simple in operation, convenient and fast and capable of avoiding deviation of the measured value caused by out of plumb or deformation of the infusion tube, ensuring accuracy of central venous pressure (CVP) measurement results and ensuring true judgment of state of an illness and normal treatment of the illness of patients.

A lifting system for vertical adjustment of a transportation system structure consists of a foot that is fastened onto the transportation system structure and during manufacturing assembly of the transportation system structure points downwards, and a foot cradle. The foot is bounded on opposite sides by two foot surfaces that are arranged at a foot-surface angle to each other. The foot cradle has two complimentary supporting surfaces against which the foot surfaces rest. The supporting surfaces are vertically movable, allowing the foot and transportation system structure to be raised or lowered, and the vertical adjustment thereby takes place. A transportation system cradle has at least one such foot cradle, and together with the transportation system structure suggested, form an intermediate product that can be moved between assembly stations in an assembly plant.

The invention belongs to the field of agricultural product processing, and relates to a clamping stamping type red date pitting machine. The clamping stamping type red date pitting machine mainly is characterized by comprising a feeding mechanism, a transmission mechanism, a pitting mechanism, a discharging mechanism and a machine body (5), wherein the feeding mechanism is composed of a feed bin (2), red date carrying chain plates (9), a brush roller (10), a crawler driving wheel (11), a red date clamping device (26) and the like; the transmission mechanism is composed of a stepping motor I (6), a stepping motor II (12), a driving shaft (16) and the like; the pitting mechanism is composed of red date pressing rods (19), pitting rods (20), righting rods (21), an upper fixed plate (22), buffer springs (23) and a lower fixed plate (24); and the discharging mechanism is composed of a pitted red date groove (7) and a red date pit groove (8); and an observation window (3) and a control panel(4) are arranged at the upper part of the machine body. The clamping stamping type red date pitting machine provided by the invention is easy to operate, safe, reliable, high in pitting efficiency and applicable to various types of red dates.

The present invention provides a RFID tag device. The device comprises a structure piece which has at least two work surfaces having an acute angle or an obtuse angle with each other; and at least one RFID tag loop arranged on the structure piece, wherein the at least one RFID tag loop comprises at least two antenna coils, wherein each antenna coil is arranged to be located at one work surface. The RFID tag device can realize the arrangement of the two antenna coils with a acute angle or an obtuse angle with each other on the space to prevent the planes where the two antenna coils are located from being vertical or parallel so as to ensure that the at least one antenna coil is not perpendicular to the antenna transmission electromagnetic wave direction to effectively avoid signal blind area phenomenon and improve the tag identification and reading efficiency.

The invention belongs to the technical field of medium-low speed maglev traffic engineering low arrangement lines and discloses a medium-low speed maglev traffic engineering double-line excavation section pile foundation combined type rail bearing beam structure. The medium-low speed maglev traffic engineering double-line excavation section pile foundation combined type rail bearing beam structure comprises a plurality of first pile foundation bearing structures, a pile foundation support beam combined bearing structure, two rows of reinforced concrete rail bearing beam base plates, two rows of reinforced concrete beam type structures and rail bearing beam two-side backfill filler. The top end of each first pile foundation bearing structure is connected with the corresponding reinforced concrete rail bearing beam base plate in a bearing mode. The top ends of the reinforced concrete rail bearing beam base plates are connected with the reinforced concrete beam type structures in a bearing mode. A drainage ditch is arranged beside the rail bearing beam two-side backfill filler and is provided with a drainage slope. According to the medium-low speed maglev traffic engineering double-line excavation section pile foundation combined type rail bearing beam structure, the requirements of a medium-low speed maglev traffic engineering rail structure for deformation of the rail bearing beam structure and high post-construction settlement can be met, the requirements of long-term stability, durability and construction quality controllability of a foundation bed can also be met, and the economy is better.

The invention discloses a threshing and deslagging integrated device for corn. The device comprises a threshing part, a separating part and an impurity removing part, wherein the threshing part comprises a horizontally arranged box body and a first threshing mechanism and a second threshing mechanism; the first threshing mechanism comprises a plurality of pressing assemblies, a supporting plate and a plurality of rotor drums; each of the pressing assemblies comprises an air cylinder and a needle head; a bottom plate is hinged to the bottoms of the rotor drums; a sensor is arranged on the bottom plate; the air cylinder, the rotor drums, the bottom plate and the sensor are connected with a controller; the second threshing mechanism comprises a roll shaft assembly and a conveyor belt; the separating part comprises a barrel body, wherein a space where corn kernel roll is formed between the barrel body and the box body; the impurity removing part comprises a conveying pipeline, a T-shaped impurity removing tower, a collecting tower and an exhaust fan. By threshing the cobs in two sections, corn kernels and cobs are separated; impurities of the cobs are removed in two sections, so that the corn kernels are separated from small particle slag body impurities and cob impurities; the device has the advantages of being sanitary, energy-saving, convenient, high in threshing efficiency, good in corn kernel quality and the like.

The invention discloses a welding device for an end cover and a supporting shaft of a pepper pedicle removing machine. The welding device includes a support frame, the support frame is provided with three end cover clamping mechanisms which are evenly distributed in the circumferential direction, and each end cover clamping mechanism includes a sliding plate, wherein the sliding plate is slidinglyconnected to the upper end of the support frame; the support frame coaxially fixes an inner layer rotary table and an outer layer rotary table, the inner layer rotary table fixes a guide pin, the guide pin is slidably connected with a slide groove in the sliding plate, the slide groove is a chute, the outer end of each sliding plate is fixedly provided with a compression frame, each compression frame is provided with an upper compression block, a lower compression block and a side V-shaped block and is used for centering and clamping the end cover, and the support frame is fixedly provided with a support sleeve and a support shaft cylinder, the supporting shaft is in sliding clearance fit with the support sleeve, the support shaft cylinder is used for tightening the supporting shaft fromthe lower side, and positioning and clamping of the supporting shaft are achieved; and the inner rotary table is fixedly provided with a welding mechanism which is used for welding the end cover and the support shaft, automatic welding of the end cover and the support shaft is achieved, and the coaxiality of the end cover and the support shaft is achieved.

The invention discloses a detection device for an angle of a cut surface of a single crystal silicon rod and a square opening machine. The square opening machine comprises a square opening machine body and the detection device for the angle of the cut surface of the single crystal silicon rod. The detection device for the angle of the cut surface of the single crystal silicon rod comprises a distance measuring sensor, a mounting pedestal and a translation driving mechanism. The mounting pedestal is installed on a clamping base of a clamping mechanism and is located below the single crystal silicon rod held by the clamping mechanism. The translation driving mechanism is used for driving movement of the distance measuring sensor. The distance measuring sensor is connected to the translationdriving mechanism, and is arranged vertically upward toward the single crystal silicon rod. After the central axis of the single crystal silicon rod is aligned with the clamping mechanism, the distance measuring sensor collects a first distance data. After the translation driving mechanism drives the distance measuring sensor to move a certain distance, the distance measuring sensor collects a second distance data. If the first distance data is inconsistent with the second distance data, the angle of the single crystal silicon rod needs to be adjusted. The detection device of the invention hasthe advantage of detecting whether the cut surface of the single crystal silicon rod is horizontal.

The invention discloses a floating location chassis riveting tool. The floating location chassis riveting tool is used for riveting a chassis and a stator core support by virtue of hollow rivets to form a combined chassis structure, the floating location chassis riveting tool comprises an upper mould set, a lower mould set, a support hole location core, a chassis inner edge floating location core,a limiting column and riveting claws, wherein a plurality of forks of the stator core support are arranged in a plurality of grooves of the chassis, after a plurality of corresponding mounting holesare aligned, the hollow rivets are inserted into the mounting holes respectively, then the overall structure is arranged inside the chassis inner edge floating location core in a sheathing manner, a support location core is in interference fit with the chassis inner edge floating location core, a bearing hole of the stator core support is arranged inside the support location core in a sheathing manner, the limiting column is in the interference fit with the chassis inner edge floating location core, the limiting column is used for limiting when the upper mould set is pressed downwards, the mounted assemblies and a plurality of riveting claws are arranged on the lower mould set, and a plurality of groups of riveting claws and the hollow rivets are respectively located on the same axis. Whenthe riveting tool disclosed by the invention is utilized for processing a combined type chassis structure, production efficiency is high, and chassis quality is good.

The invention belongs to the technical field of anti-theft door locks, and particularly relates to an anti-theft door lock. The anti-theft door lock comprises a lock body, wherein the lock body comprises a shell, a handle and a lock head, four rectangular through holes are formed in the front surface of the shell at equal intervals in the circumferential direction of the lock head, clamping platesare rotationally installed at the rectangular through holes, the ends, close to the lock head, of the clamping plates are made of iron materials, the clamping plates are located in an inner cavity ofthe shell, limiting blocks are fixed at the positions, located at the rectangular through holes, of the inner cavity of the shell, electromagnets are arranged on the side walls of the limiting blocks, reset springs are fixed at the output ends of the electromagnets, and the ends, far away from the corresponding electromagnets, of the reset springs are fixed at the ends, close to the lock head, ofthe adjacent clamping plates. According to the anti-theft door lock, the clamping plates in the four directions are popped up to limit and guide a key on the hand of a user, so that the key on the hand of the user is kept at a correct angle and position, then the user can conveniently align the key, then the door opening efficiency of the user is improved, and convenience is brought to the dailylife of the user.

The invention discloses a silicon single crystal rod cutting surface angle detection device and a squaring machine. The squaring machine comprises the silicon single crystal rod cutting surface angledetection device, and the silicon single crystal rod cutting surface angle detection device comprises a measuring member, a vertical driving mechanism and a longitudinal driving mechanism; the vertical driving mechanism comprises a servo motor, a vertical screw, a connecting seat and a slide rail; the slide rail is vertically arranged at a clamping seat of a clamping mechanism; the connecting seatis provided with a slide block, the slide block is installed in the slide rail in a vertical slidable manner; the servo motor is arranged at the clamping seat of the clamping mechanism, and an outputshaft of the servo motor is vertically arranged; the vertical screw is coaxially connected with the output shaft of the servo motor, the connecting seat is provided with a vertical threaded hole, andthe vertical screw passes through the threaded hole of the connecting seat in a threaded transmission manner; the longitudinal driving mechanism is used for driving the measuring member to move; andthe measuring member is connected to the longitudinal driving mechanism and vertically protrudes upward relative to the connecting seat. The silicon single crystal rod cutting surface angle detectiondevice disclosed by the invention has the advantages of being able to detect whether a cutting surface of a silicon single crystal rod is horizontal.

The invention discloses a light-weapon trajectory deviation prediction method based on laser anemometry and relates to the technical field of light weapons. The method comprises the following steps that a shooting person is in place at the shooting point, and an observation person measures the distance between a target object and the shooting point; according to the measured distance, three or more measurement points are set, and analogy is conducted according to the sequence a, b, c and d, wherein the measurement point a is located at the target object, and other measurement points are located at the two sides of the measurement point a respectively; according to the measured distance, multiple measurement distances are set, and analogy is conducted according to the sequence S1, S2, S3 and S4, wherein the measurement distances are larger than or equal to 50 m. According to the method, by setting multiple measurement points and measurement distances, the laser emission direction is prevented from being vertical to horizontal wind, the measurement stability is improved, the laser measurement time is short, the change amount of the horizontal wind is small, the horizontal wind stateof all the distances on a light-weapon trajectory can be measured, and the method has the advantage of improving the shooting precision of light weapons.

The invention discloses a spatial cable suspension bridge main cable construction assisting device. The spatial cable suspension bridge main cable construction assisting device comprises spatial cablefixing brackets and main cable strand wire temporary fixing devices, wherein a transverse support and two longitudinal supports are arranged on each spatial cable fixing bracket; the top ends of thelongitudinal supports are connected with the transverse support to form a trapezoid; the bottom ends of the longitudinal supports are connected with a main bridge steel box girder; the longitudinal supports are positioned on a spatial cable design plane of a main cable; the main cable strand wire temporary fixing devices are arranged at the upper parts of the two sides of the spatial cable fixingbrackets; each main cable strand wire temporary fixing device comprises an external sleeve, a plurality of locating cable clips and a connecting plate; a main cable strand wire penetrates through thelocating cable clips; the adjacent locating cable clips are spliced with each other within the same plane; the adjacent locating cable clips are connected with each other through connecting plates; the twisting of the main cable can be effectively prevented; the phenomena that the internal and external stresses are not balanced and the safety stock of the main cable is reduced due to the wire swelling phenomenon generated in the main cable mounting process are avoided; and the phenomenon that a spatial sling cannot enter a hole or is not perpendicular to the anchoring surface can be avoided.

The invention discloses an installing method for self-aligning roller bearings in a coal cutter rocker arm. The method comprises the following steps that firstly, fake bearing installation is conducted; secondly, shaft gear and first self-aligning roller bearing installing is conducted; thirdly, second self-aligning roller bearing installing is conducted; and fourthly, the first step, the second step and the third step are repeatedly conducted many times, and installation of the first self-aligning roller bearings and the second self-aligning roller bearings at the two ends of multiple shaft gears is finished. According to the method, steps are simple, design is reasonable, installation is convenient, and the using effect is good; the self-aligning roller bearings are positioned through installation of fake bearings, and the self-aligning roller bearing installing process can be easily, conveniently and rapidly finished; the installing process is simple, labor of workers is greatly reduced, meanwhile, damage of the self-aligning roller bearings is avoided, the service life of the self-aligning roller bearings is greatly prolonged, and the self-aligning roller bearings are economical and practical.

The invention relates to a direction-changing quantitatively-adjustable air distribution sleeve at the vault of a clean heat recovery coke oven. The air distribution sleeve comprises a sleeve, a direction-changing device, a sealing device, an adjusting device, an indicating device and a stop device, wherein the sleeve is provided with the direction-changing device, the direction-changing device is provided with the adjusting device, the indicating device and the stop device, and the sealing device is arranged between the sleeve and the direction-changing device. According to the invention, through additional arrangement of the air distribution sleeve, one air distribution at the vault enters into a coking chamber after changing of direction, so a vertical fire pillar is prevented from being perpendicular to the surface of a coke cake and air distribution amount can be quantitatively adjusted; thus, burning loss of coke is effectively controlled, coal consumption is substantially reduced, economic benefits of the heat recovery coke oven are greatly improved, and competitiveness of the heat recovery coke oven is enhanced.