80results about How to "Turn around" patented technology

The invention provides an electric pressure cooker realizing simple and convenient cover opening operation. The electric pressure cooker comprises a cooker body, a cooker cover and a fastener, wherein the fastener comprises a movable clamp arranged on the cooker cover and a buckle piece positioned on the cooker body, the cooker cover is buckled to the cooker body through the fastener, the cooker cover comprises a lock cover and a liner, the lock cover rotates to realize the locking and unlocking of the lock cover and the cooker body, the cooker cover is further provided with a rotation base and a shift fork part linked to the rotation base, the rotation base drives the lock cover to rotate through the shift fork part, the rotation base is provided with a trigger part, the liner is provided with a rotation drive part positioned between the trigger part and the movable clamp, the rotation base drives the lock cover to rotate to the unlocking position, meanwhile, the trigger part triggers the rotation drive part, the rotation drive part pushes the movable clamp, and the movable clamp is separated from the buckle piece, so that the cooker cover is opened. According to the electric pressure cooker, the shift fork part drives the lock cover to rotate, when the lock cover rotates to the unlocking position, cooker teeth are staggered from cover teeth, meanwhile, the movable clamp is triggered, then the cooker cover is opened, the cooker cover is opened only through one rotation step, and thus the use by a user is facilitated.

The invention provides an electric pressure cooker with a cover being conveniently opened. The cooker comprises a cooker body, a cooker cover and a buckling part. The buckling part comprises a movable clamping part arranged on the cooker cover and a fastener located on the cooker body. The cooker cover is buckled with the cooker body through the buckling part. The cooker cover comprises a lining and a lock cover located below the lining. The lock cover rotates so that the lock cover and the cooker body are locked and unlocked. The cooker cover is further provided with a cover-opening assembly which drives the locking cover to rotate. The lock cover is provided with an unlocking part. When the cover-opening assembly drives the lock cover to rotate at the first set position, the lock cover and the cooker body are unlocked. When the cover-opening assembly drives the lock cover to continuously rotate at the second set position, the fastener is acted upon the movable clamping part. The movable clamping part is separated from the fastener such that the cooker cover is opened. The rotation angle at which the lock cover rotates from the first set position to the second set position is Alfa. The cooker cover is provided with an elastic device driving the lock cover to rotate. After the cooker cover is opened, the elastic device drives the lock cover to rotate at the angle of Beta which is less than Afla. The electric pressure cooker with the cover being conveniently opened facilitates opening the cover.

The invention provides an electric pressure cooker capable of facilitating cover opening. The electric pressure cooker comprises a pot body, a pot cover and a clamping buckling component; the pot cover comprises a liner and a lock cover located below the liner; the clamping buckling component comprises a movable clamping component arranged on the liner and a buckling component located on the pot body; the pot cover is buckled to the pot body through the clamping buckling component; the liner is provided with a cover opening assembly; the cover opening assembly drives the lock cover to rotate; the rotation of the lock cover enables the locking and unlocking of the lock cover and the pot body; the lock cover is provided with an unbuckling component; a distance from the unbuckling component to the center of the lock cover is 1 / 5 to 4 / 5 of the radius of the lock cover; a collision avoidance groove is arranged on the liner; the unbuckling component passes through the collision avoidance groove and extends to the upper surface of the liner; and the cover opening assembly drives the lock cover to rotate for unlocking, and the unbuckling component acts, so that the movable clamping component is separated from the buckling component. According to the electric pressure cooker of the invention, the pot cover can be opened just through rotation, and therefore, the electric pressure cooker is convenient for a user to use.

The invention relates to a skid type AGV (automatic guided vehicle). The skid type AGV comprises a main frame, double-belt wheel drive devices, a ground wheel drive device, direct-current servo motors, a storage battery, a PGV color recognition sensor and an obstacle recognition sensor, wherein the double-belt wheel drive devices are symmetrically arranged on the middle position of the main frame bilaterally; the two direct-current servo motors which are connected in the main frame are in transmission connection with the two double-belt wheel drive devices respectively; the ground wheel drive device comprises a left front wheel, a right front wheel, a left rear wheel and a right rear wheel, the left front wheel and the left rear wheel are in same-direction synchronous rotation, and the right front wheel and the right rear wheel are in synchronous same-direction rotation; a transmission structure of the AGV is realized by utilizing double synchronous belt wheels and a reduction supporting structure, so that the AGV has the mechanical type self-adaptive four-wheel-drive capacity. Furthermore, the color recognition sensor is applied to substitute a conventional magnetic navigation and RFID (radio frequency identification device) location mode with a color navigation and two-dimension code location mode, so that the navigation precision is improved, and the product cost and the using cost of the product are reduced.

The invention belongs to the technical field of biomass fuel and preparation thereof, and particularly discloses cotton stalk core biomass compression fuel. In the fuel, the cotton stalk core content is 85 to 90 percent, the compressed density of the fuel is 1,100 to 1,400kg / m<3>, the relaxed density is 700 to 900kg / m<3>, and the water content is 8 to 12 percent. The preparation method comprises the following steps of: using the cotton stalks, of which the water content is below 12 percent, as a raw material; performing separating treatment by a cotton stalk skin-core separating machine; crushing the separated cotton stalk cores; molding the cotton stalk cores by compression under a pressure of 70 to 100MPa; and performing cooling and packaging to obtain the finished products, wherein thebyproducts of cotton stalk skin obtained by separation can also be used for spinning and paper-making, so that the comprehensive utilization of the cotton stalks is realized. The cotton stalk core biomass compression fuel has the advantages of high heat efficiency, low ash content, little pollution, no damage to a boiler, convenient transportation and storage and the like; and the process method has the advantages of high process efficiency, low equipment cost, low production cost, good product quality and the like.

The invention discloses a heliostat of a double-push-rod structure. The heliostat comprises reflectors, heliostat frames, a main beam, a supporting base, a connecting base and a first bearing. The main beam is used for mounting of the heliostat frames. The heliostat frames are used for supporting the reflectors. The main beam is connected with and arranged on the connecting base. The main beam can rotate around itself to do horizontal rotational motion. The supporting base and the connecting base are connected through the first bearing, and the connecting base can rotate around the supporting base to do azimuth rotational motion. The connecting base is driven by an azimuth telescopic push rod to do azimuth rotational motion around the vertical axis of the supporting base. The main beam is driven by a horizontal telescopic push rod to do horizontal rotational motion around the horizontal axis of the main beam. The heliostat of the double-push-rod structure has a short transmission chain, and the precision of the rotation angle is easy to control. Moreover, the number of main parts is small, and the machining and manufacturing difficulty and the manufacturing cost are reduced.

The invention discloses an operating device for densely-installed valves. The problem that for dense valve tree using occasions, the operating space of an existing valve operating device is limited issolved. The operating device comprises a moving chassis, a multi-axis driving mechanism assembled on the moving chassis, and a self-limiting valve opening-closing device, and is characterized in thatthe self-limiting valve opening-closing device comprises a valve opening-closing transmission mechanism, a limiting compensator and a wrench which is of a clamping claw structure, the multi-axis driving mechanism is fixedly connected with a connection flange of the moving chassis through a base of a first RV speed reducer and orderly moves along with the moving chassis; and the valve opening-closing transmission mechanism composed of a telescopic rotation driving mechanism and a barrel body drives the wrench of the clamping claw structure through the limiting compensator, rotating is conducted while axial sliding is carried out, and valve opening, closing and adjusting are completed. The operating device is reasonable in structural design, safe, easy and convenient to operate, and quick and stable in operating, the operating enveloping space is not limited, manual valve operating can be effectively replaced, operating is more precise and reliable, and the operating efficiency is remarkably improved.

The invention provides a large-working space parallel robot mechanism. The parallel robot mechanism comprises a base, a branched chain, a moving platform and a drive device, wherein the drive device is connected with the branched chain; both ends of the branched chain are in rotary connected to the base and the moving platform respectively, and the rotary shaft axes in rotary connection are arranged in the same direction; the rotary connection between the branched chain and the base is connection by a rotation pair; and the rotary shaft axes between the branched chain and the moving platform are parallel in pairs; and the branched chain comprises a first branched chain, a second branched chain and a third branched chain, and the three branched chains are arranged in a staggered way. The large-working space parallel robot mechanism has the advantages that: the defect of small working space in the conventional parallel mechanism is overcome, a quite large ring-shaped working space is possessed, and an end actuator can flexibly realize whole cycles of continuous rotations due to the layering design of the moving platform; because an active arm of the branched chain is compactly designed, the design of the base is simplified, and the necessary mounting space is reduced; and the drive device is arranged on the base, which facilitates the mass reduction of moving parts and improves overall performance of the mechanism.

The invention relates to a solar street lamp capable of automatically cleaning, and belongs to the technical field of non-portable illuminating devices and systems thereof. The solar street lamp comprises a support base; the lower end of the support base communicates with a water tank; a water outlet is formed in the side wall of the water tank; a baffle plate is slidingly matched in the water outlet; a cavity communicates outside the water outlet; a second through hole is formed in the side wall of the cavity, and is slidingly matched with a connecting rod; one end of the connecting rod is connected with the baffle plate, and the other end of the connecting rod is a free end; a gear is rotationally connected below the support base, and is engaged with a gear ring on the connecting rod; the gear is coaxially connected with a rotating shaft; the rotating shaft is connected with a torsion spring; the torsion spring is connected with a shielding plate; a guide pipe communicates below thecavity; the bracket is rotationally connected with a waterwheel; the waterwheel is coaxially connected with a first bevel gear; the first bevel gear is engaged with a second bevel gear in the horizontal direction; and the second bevel gear is coaxially connected with a brush. A solar panel is prevented from dipping in rainwater for a long time, and meanwhile, cleaning of a lamp cover is realized,so that clear illumination of the solar street lamp is guaranteed.

The invention discloses a directional wire-line coring drilling tool and a drilling method thereof. The drilling tool comprises an outer pipe unit, an inner pipe unit matched with the outer pipe unitfor use and a salvaging unit used for fishing the inner pipe unit; the outer pipe unit comprises a coring drill bit, an outer pipe body, an elastic clamp chamber, a coring drill rod and a water hole which are coaxially arranged in sequence; the inner pipe unit comprises a rock core pipe, an elastic clamp and a stall braking device which are coaxially arranged, wherein the elastic clamp is connected with the elastic clamp chamber in a matched and clamped mode, and the stall braking device is the stall braking device recorded in the invention; and the salvaging unit is connected with a salvagingspearhead of the stall braking device. According to the drilling tool, the azimuth angle of the coring drill bit can be adjusted according to hole deviation data, a drilling track is adjusted, and awhole drill stem column does not need to be lifted out, so that continuous directional coring drilling is achieved, labor force can be greatly saved, drilling return times in unit time are increased,and efficiency is improved.

The invention relates to a specially-shaped body annular groove machining mechanism, which is characterized in that a vertical plate is connected with a soleplate into a whole, the vertical plate is provided with a connecting bolt which is in fitting connection with a numerical-control lathe rotary main shaft chuck to be locked; a specially-shaped body to be machined is tightened onto the soleplate through a tightening screw and a hexagonal nut, and the soleplate is provided with a positioning key which enables the specially-shaped body to be machined to rotate concentrically with the numerical-control lathe rotary main shaft; and a pressure plate is installed on the upper part of the vertical plate, the front end of the pressure plate is provided with a pressure block for compressing the specially-shaped body to be machined through a compression screw, the pressure block can be compressed onto the specially-shaped body to be machined by screwing the compression screw, and the compression screw is provided with a locking nut. A machined part of the specially-shaped body can be rotated through rapid installation, clamping and positioning, and an ordinary tool is used for cutting a hole and an annular groove to be machined of the specially-shaped body, so that the auxiliary time is reduced, the machining efficiency is improved, and the investment cost of the equipment and forming tool can be greatly reduced.

The invention belongs to the field of numerical control machine tool spindle repair, and mainly relates to a device used for self-grinding repair of a numerical control machine tool spindle conical hole. The device used for self-grinding repair of the numerical control machine tool spindle conical hole comprises a base, rotation frames, a rotation frame supporting bearing, belt wheels, a belt, a motor, a spindle shell, a spindle, a grinding wheel, an angular contact ball bearing, a bearing gland, a cylindrical roller bearing, a deep groove ball bearing and a rotation supporting shaft. The device is simple in structure and convenient to operate, a machine tool spindle does not need to be detached, machine tool numerical control programming feeding is adopted to be matched with the device for work, spindle conical hole repair can be finished, operation is convenient, the cost is quite low, the repair quality can be ensured, and the prominent large-scale application prospect is achieved.

The invention discloses a multi-functional annular longitudinal seam welding machine tool. The multi-functional annular longitudinal seam welding machine tool comprises a machine tool body, an overturning mechanism, a headstock chuck, a tailstock chuck and a welding component. The machine tool body is a horizontally installed cuboid frame structure. The overturning mechanism is installed at one end of the machine tool body. The tailstock chuck is installed at the other end of the machine tool body, and can be moved to be close to or away from the headstock chuck along a length direction of themachine tool body. The overturning mechanism is in transmission connection with the headstock chuck, and can drive the headstock chuck to be upwards and downwards overturned. While the headstock chuck can be downwards overturned to be opposite to the tailstock chuck, a tank can be clamped between the headstock chuck and the tailstock chuck. The welding component is used for welding and processingthe tank clamped between the headstock chuck and the tailstock chuck. The multi-functional annular longitudinal seam welding machine tool is capable of improving a utilization ratio of space.

The invention discloses a novel hot air-microwave composite in-place hot recycling complete set. The novel hot air-microwave composite in-place hot recycling complete set comprises a hot air heater (1) arranged at the foremost end of the complete set, wherein a microwave heater (2) is arranged at the back end of the hot air heater (1); a microwave heating milling machine (3) is arranged at the back end of the microwave heater (2); a dump truck and multifunctional feeder adding combination (4) is arranged at the back end or on the side surface of the microwave heating milling machine (3); a remixing recycling machine (5) is arranged at the foremost end of the complete set. The invention further discloses a construction technology of the novel hot air-microwave composite in-place hot recycling complete set. Through the novel hot air-microwave composite in-place hot recycling complete set and the construction technology thereof, provided by the invention, accurate control of the modular zone heating temperature is achieved and the uniformity of a whole heating surface is guaranteed; the novel hot air-microwave composite in-place hot recycling complete set has good adaptability to large-bend construction, large-angle climbing, transfer transportation and the like; power-variable and intermittent heating of a modular heating wall and machine group control are achieved, the heating efficiency is high, the heating depth is high and adaptability to the disease condition is strong.

The invention provides a multi-section type swing, which comprises two swing frames, swing arms, electromagnetic clutches, a beam, a beam base, a seat and the like. Two vertical frames are arranged on two sides respectively to form the two swing frames which are connected with each other through the beam, two sides, close to the swing frames, of the beam are respectively provided with one swing arm, each swing arm is divided into an upper swing arm and a lower swing arm, the top end of each upper swing arm is connected with the beam through one electromagnetic clutch, and each upper swing arm is connected with the corresponding lower swing arm through one electromagnetic clutch. Each upper swing arm and the corresponding lower swing arm cannot relatively rotate when the electromagnetic clutches are powered on, and can relatively rotate when the electromagnetic clutches are powered off. Owing to the technical scheme, a user can realize the action of common swinging, rotating and the like by sucking the electromagnetic clutches at different positions, different action modes can be combined, and then a novel multi-section type swing is formed. The multi-section type swing has the functions of entertainment and fitness, has the advantages of simple structure, high interestingness and the like, and is adaptable to environments such as a large amusement park, a community yard and the like.

The invention discloses a revolving forklift which structurally comprises an upper forklift chassis, a lower forklift chassis, a gantry, a pallet fork, a gantry inclination mechanism, a forklift revolving support, a revolving pinion, a revolving driving motor, a speed reducer and a forklift tire, wherein the upper forklift chassis is connected with the lower forklift chassis through the forklift revolving support; the lower forklift chassis is connected with the forklift tire; the gantry inclination mechanism is connected with the upper forklift chassis; the gantry and the pallet fork are fixed in front of the upper forklift chassis; the revolving driving motor and the speed reducer are fixed below the upper forklift chassis; and the revolving pinion is connected with the speed reducer. The revolving forklift has the beneficial effects of easily revolving and taking materials in a special working space.

The invention provides an inner clamping type double-finger conveying device and belongs to the technical field of automatic conveying. The inner clamping type double-finger conveying device comprisesa conveying assembly and a clamping assembly. Guide assemblies and lifting air cylinders of the conveying assembly are arranged in a staggered manner at equal intervals. A horizontal moving support is arranged on a horizontal guide rail in the manner of being capable of sliding left and right. A horizontal lead screw is in thread connection with the horizontal moving support. A first bevel gear of the clamping assembly is arranged on a clamping box in a rotating manner through a horizontal gear shaft. A swing air cylinder and the horizontal gear shaft are coaxially connected. A second bevel gear is installed on a vertical gear shaft. The first bevel gear and the second bevel gear are meshed. An opening and closing cam is installed at the lower end of the vertical gear shaft. The upper endof a left clamping finger is hinged to the lower end of a left clamping finger support through a left clamping finger pin shaft, and the upper end of a right clamping finger is hinged to the lower end of a right clamping finger support through a right clamping finger pin shaft. The inner clamping type double-finger conveying device can convey ring-like workpieces fast, the opening and closing degree of the left clamping finger and the right clamping finger can be adjusted in a stepless manner, and the conveying device can be applicable to the ring-like workpieces of different types.

The invention provides a manipulator, and relates to the technical field of robots. The technical problems of complex structure and large space occupation in the prior art are solved. The device comprises a sealing cylinder, an upper end cover, a lower end cover, a reciprocating motor assembly, a rotating motor and a tool part, wherein the upper end cover and the lower end cover are in sealed connection with the two ends of the sealing cylinder correspondingly, the reciprocating motor assembly is arranged inside the sealing cylinder and gets close to the lower end cover, the rotating motor isarranged inside the sealing cylinder and gets close to the upper end cover, and the tool part is arranged outside the upper end cover; and the rotating motor is a first hollow motor, a second output shaft of the reciprocating motor assembly penetrates through a first output shaft and is connected to the tool part, and the first output shaft is connected with the tool part. The manipulator is usedfor the field of the robots, traditional transmission structures such as gears, belt wheels and chains are avoided through using of a reciprocating motor and the first hollow motor, rotation and advancing-retreating of the tool part are realized in the compact structure, different tool parts can be switched, and various functions are compatible.

A rotary drilled hole sealing device for air drilling can be used for the technical fields such as air drilling, mine blasting hole construction and geological exploration. The device comprises sealing semicircular sliding blocks, a sliding block base, clamping springs, spring pull rods, a connecting core pipe, fixing bolts, bearing glands, bearing blocks, a hole connecting pipe, bearings, a sealing packing, rubber sealing sheets and spring baffles. A rotating drill pipe is clamped by the sealing semicircular sliding blocks under the action of the clamping springs, the drill pipe rotates to drive the sealing semicircular sliding blocks, then the sliding block base, the connecting core pipe and the bearings are driven to rotate together, and accordingly rotation of the sealing device is achieved. Rotary sealing avoids abrasion of a sealing material is avoided, so that the sealing effect is better. The clamping springs provide clamping force and can adjust the clamping force in time according to resistance, and the resistance of the drill pipe is reduced to the largest extent. The sealing semicircular sliding blocks in different specifications can be replaced to meet requirements fordrill pipes in different specifications.

The invention discloses a layered hot milling device, a hot-air microwave composite in-situ heat regeneration complete set and a layered construction method thereof. The layered hot milling device comprises a hot-air heating machine, a front milling heating machine, a rear milling heating machine, a microwave tunnel heating machine, a feeding machine, a remixing machine and a remixing and regeneration machine, wherein the asphalt pavement is heated by local hot air layered heating, layered hot milling and layered conveying, which realizes semi-closed and low temperature construction, reduces energy consumption and improves construction efficiency. The new modular heating technology of hot wind variable power and microwave composite heating is adopted to realize the asphalt pavement non-destructive, uniform and high efficient heating, recover the asphalt pavement performance, smokeless and environmental protection, moderate heating depth, small temperature gradient between layers, no gradation damage in hot milling, the temperature of asphalt material in each link up to the standard, and high construction quality. The new material is added by dump truck and multi-function feeder, which realizes multi-degree of freedom, multi-direction feeding, accurate and continuous feeding, and small temperature drop of asphalt material.

The invention discloses an unmanned control system of a tower crane. The unmanned control system comprises a cloud server platform and a tower crane remote control terminal; the cloud server platform is respectively connected with a client and a central control board through a fifth switch; the cloud server platform is connected with a tower crane monitoring terminal through a communication module; and the tower crane monitoring terminal is in communication connection with a fixed base station. The tower crane monitoring terminal comprises a signal and communication part, an operation control part, a video monitoring part, a trolley monitoring part, a lifting hook monitoring part and an on-site remote controller. According to the unmanned control system of the tower crane, unmanned control of the tower crane can be achieved, manual operation is reduced, the safety risk of a driver is reduced, and the economic benefits of enterprises are improved.

The invention discloses a multi-degree-of-freedom assembling system suitable for large size equipment assembly in cabin of a spacecraft. The system comprises a small arm drive, a large arm drive, a lifting mechanism, a vertical rail, a swing mechanism, a base, a horizontal rail and a tail end executing function mechanism. A horizontal sliding block device is connected with a guide rail above the horizontal rail, so that the movement of the base and the whole mechanism borne by the base in the horizontal direction is realized; a slewing bearing is fixed to the upper surface of the base, the vertical rail is fixedly connected to the slewing bearing of the swing mechanism, and the large arm drive is installed on the longitudinal guide rail through a vertical sliding block device and moves inthe vertical direction. The lifting mechanism is fixedly connected to the other opposite side face of the vertical rail, overall rotary motion is achieved through a gear installed in a winding drum, the small arm drive is connected with the large arm drive through a turbine speed reduction device, and the small arm drive is used for driving the tail end executing function mechanism to execute actions. According to the invention, the risk of easy shaking in the hoisting process is overcome, the safety is high, the manual labor is reduced, and the assembly agility and safety of the product are improved.

The invention relates to a new-energy motor vertical head turning machine. The machine comprises a worktable (1), the worktable (1) is provided with an sheet inserting mechanism (4), the bottom in thesheet inserting mechanism (4) is provided with a head turning mechanism (3), and the worktable (1) is further connected with a downward pressing device (5) located over the sheet inserting mechanism(4) through a plurality of support columns (11). The machine can achieve automatic head turning of a stator coil.

The invention discloses a self-limiting valve opening and closing device, and solves the problem of a traditional mechanical transmission mechanism incapable of extending front and back and adjustingleft and right in the center line direction of a valve mandrel of a valve hand wheel in multi-valve use places. The self-limiting valve opening and closing device comprises a valve opening and closingtransmission mechanism, a limiting compensator and a spanner, wherein the valve opening and closing transmission mechanism consists of an extension driving mechanism, a rotary driving mechanism, anda cylinder supported between the extension driving mechanism and the rotary driving mechanism; under driving by an extension motor and a rotary motor, when a hollow spline shaft penetrating through atransmission shaft of a rotary RV speed reducer axially slides in the cylinder, the hollow spline shaft is synchronously rotated around a center line parallel to a rotary shaft; and the spanner with aclamping jaw structure is driven through the limiting compensator, and is rotated during axially sliding to finish opening, closing and adjustment of a valve. The self-limiting valve opening and closing device is simple in structure, reasonable in design, convenient to operate and stable in operation, can effectively replace manual adjustment of the valve, is precise, fast and safe in operation,and prominently improves the operation efficiency.

The invention discloses a self-dropping type box girder steel pipe bailey door opening bracket and a supporting method thereof. The bracket comprises a reinforced concrete foundation (1), wherein a plurality of steel buttress piers (2) are arranged on the reinforced concrete foundation (1) and are connected with the reinforced concrete foundation (1) through sand boxes (3); bailey truss components (4) are arranged on the steel buttress piers (2); the steel buttress piers (2) and the bailey truss components (4) are combined to form a bailey door opening. Due to the fact that the structure of the bracket is toolized and modularized and the self-dropping characteristic of the sand boxes is applied, a casting box girder bracket can be assembled and disassembled within about 7 days, and the construction speed is increased; due to the adoption of the technology that the whole sand boxes fall into a die, the workload of work high above the ground for de-molding the bracket is reduced by over 90 percent, and the safety of construction is greatly improved.

The invention relates to a concrete spreader boom, which comprises a first spreading rod and a second spreading rod, wherein a delivery pipeline is connected between the first spreading rod and the second spreading rod. The concrete spreader boom is characterized in that a first horizontal slewing mechanism is arranged at the tail end of the first spreading rod, a slewing head capable of slewing horizontally is arranged on the first horizontal slewing mechanism, and the front end of the second spreading rod is movably connected with the slewing head so that the second spreading rod can slew vertically. The invention further provides a concrete spreader provided with the concrete spreader boom. The concrete spreader boom is simple in structure, and joints of various sections of the boom can pitch and slew simultaneously. Cost of the concrete spreader utilizing the concrete spreader boom is controlled well.

In a method for operating a printing press, when an interruption of a printing process occurs during a print job, an ink profile in an inking unit is at least partly reduced or evened out in a first step by interrupting a supply of ink and printing a defined number of sheets while the ink supply is interrupted and by having a cylinder carry out a defined number of revolutions in the process. In a second step the ink profile is completely built up again by resuming the supply of ink and carrying out a reintroduction of ink without printing on the same defined number of sheets while the cylinder carries out the same defined number of revolutions in the process.

Most of freight wood boxes, plastic transfer boxes and metal containers cannot be folded, and are provided with no buffer structure; the first one causes high backhaul cost of empty boxes, and the latter one needs to add additional buffer piece cost for damageable goods; and according to the reactive force law, the average life of packing boxes is shortened through the transportation impact. The invention discloses a foldable buffer packing box; the mutual conversion of two states of formation and folding of the packing box is realized through series of hinges; through combined application ofsuch structures as side plate dowel pins, side plate hinges with deflected rotating shafts, bolts between separation plates and buffer support legs, the technical difficulty of lower connecting strength in movable connection of hinges compared with fixed connection is solved; the foldable packing box can be enough to bear such dynamic loads as vibration impact and stacking in the transportation process; the empty box transportation cost is reduced; meanwhile, the cost of goods buffer packing can be reduced through buffer support legs; and through avoided box internal space, the goods transportation cost can be reduced.

The invention discloses a large-scale heavy-load walking type all-terrain mobile rotary platform. The large-scale heavy-load walking type all-terrain mobile rotary platform is characterized by comprising a rotary platform at an outer side and a travelling platform at an inner layer, wherein a control room is arranged on the rotary platform; a plurality of supporting legs are arranged on the travelling platform; each supporting leg comprises a movable supporting base, and a supporting leg oil pressure cylinder fixedly arranged on the movable supporting base, and the piston end of the supportingleg oil pressure cylinder is hinged with a supporting plate; guide rails are arranged on the travelling platform; guide slots matched with the guide rail are formed in the movable supporting base; aleft shifting oil cylinder capable of pushing the movable supporting bases to move leftwards and a right shifting oil cylinder capable of pushing the movable supporting bases to move rightwards are arranged on the travelling platform; the rotary platform is connected with the travelling platform through a rotary mechanism; the rotary mechanism comprises a hydraulic drive motor and a bearing base mounted on the travelling platform; a flange disc and a platform rotary shaft connected with the flange disc are mounted on the bottom surface of the rotary platform; the platform rotary shaft is matched with the bearing base through a bearing; and the hydraulic drive motor is connected with the platform rotary shaft and drives the platform rotary shaft to rotate.