64results about How to "Adjustable up and down position" patented technology

The invention relates to the field of power supply technologies for electric vehicles, in particular to a pantograph and an electric vehicle with the same. The pantograph comprises a pantograph assembly. The pantograph assembly comprises a pantograph slide plate assembly, an upper support arm, a lower support arm, a pantograph support, movable tracks, expansion mechanisms and a translation mechanism, the pantograph slide plate assembly is perpendicular to a power supply line, the translation mechanism is further arranged on the movable tracks, and the expansion mechanisms are arranged betweenthe upper support arm and the pantograph support and between the lower support arm and the pantograph support. The pantograph is arranged on the top of the electric vehicle. The electric vehicle further comprises a data processing unit and a tracking device. The tracking device is arranged on the top of the electric vehicle, and the expansion mechanisms, the translation mechanism and the trackingdevice are in signal connection with the data processing unit. The pantograph and the electric vehicle have the advantages that the height of the pantograph can be adaptively adjusted, the pantographcan be in excellent contact with the power supply line even when the electric vehicle is deviated in lanes in the left-right directions, accordingly, power supply can be guaranteed against being interrupted, and the charge safety of the electric vehicle can be improved.

The invention relates to an overturning machine for lifting a roll material. The overturning machine comprises an overturning rack, a lifting overturning plate and an overturning mechanism. The overturning rack comprises a pair of stand columns which are distributed oppositely and vertically arranged. The lifting overturning plate is arranged between the two stand columns, movably matched with thestand columns and driven by a lifting mechanism mounted on the stand columns to ascend and descend along the stand columns. The overturning mechanism drives the lifting overturning plate to be overturned. The overturning machine has the advantages that by means of cooperation among the overturning rack, the lifting overturning plate, the lifting mechanism and the overturning mechanism, the roll material can be fed automatically; the overturning machine is simple in structure; the roll material only needs to be manually delivered to the lifting overturning plate in the whole process; the smallamount of labor work is needed; and the overturning machine is convenient to operate.

The invention provides an air-blowing based cooling type sealing machine structure. The air-blowing based cooling type sealing machine structure comprises a housing seat; a feeding strip is arranged on the right end part of the housing seat; a transition wheel mechanism, a pre-pressing strip mechanism, a thermal forming mechanism, a cooling strip mechanism, a cooling strip mechanism, a compressing wheel mechanism and a discharging wheel mechanism are arranged in parallel at a working station of a first strip and fixedly mounted in the middle part of the housing seat from right to left in sequence; a belt seat and a conveyor are arranged at the front side of the housing seat; a position adjusting seat is arranged at the lower part of the belt seat; an air compressing pump is mounted in the position adjusting seat; an air storing tank is arranged at the left side of the air compressing pump; an air supply pipe that supplies air to the cooling strip mechanism is connected to the air storing tank. The air-blowing based cooling type sealing machine structure is reasonable in design, simple in structure and convenient to use; a pocket opening is automatically conveyed and processed; the upper and lower positions of the conveying belt can be adjusted; cooling can be performed timely; the advantages of tight, firm and regular sealing and good forming effect are brought.

The invention provides a PIV (particle image velocimetry) calibration target support adjustment mechanism which comprises a vertical support adjustment mechanism and a horizontal support adjustment mechanism. The vertical support adjustment mechanism comprises a screw thread adjusting rod, an upper bearer, a lower bearer and an orifice plate used for installing a calibration target. The screw thread adjusting rod goes through a screwed hole of the lower bearer, one end of the screw thread adjusting rod is fixedly connected with the upper bearer, the upper bearer is slidingly installed on the lower bearer, and the orifice plate is fixedly installed on the upper bearer. The horizontal support adjustment mechanism comprises a fixed base plate, a vertical support and an adjusting plate used for installing the calibration target. The vertical support is fixedly installed on the fixed base plate and is opened with a vertical groove, and the adjusting plate is slidingly installed in the vertical groove. The PIV calibration target support adjustment mechanism has the characteristics of capability of reducing calibration difficulty, high adjusting efficiency and small space occupancy.

The invention discloses a substrate dividing device, comprising an etching device (D) forming etching lines on the surface of brittle material substrate (W); a conveying mechanism (E) which transmits the etched substrate (W) to an absorbing inversion mechanism (G); the absorbing inversion mechanism (G) which has an absorbing plate (29) which can be inversely rotated up and down through a rotating shaft (28), and which takes the substrate (W) from the conveying mechanism (E) and enables the substrate (W) to be inversely rotated up and down and to be placed on a platform (15) of a breaking device (F); and the breaking device (F) which breaks the substrate (W) taken from the absorbing inversion mechanism (G). The rotating shaft (28) of the absorbing plate (29) of the absorbing inversion mechanism (G) is disposed at the end part of the absorbing plate (29) in an extending manner along a direction approximately orthogonal to the conveying direction of the substrate (W). The absorbing plate (29) absorbed with the substrate (W) is inversely rotated with the rotating shaft (28) being the fulcrum. The rotating shaft (28) is disposed near the platform (15) of the breaking device (F) in a manner that the inversely-rotated substrate (W) can be disposed on the platform (15) of the breaking device.

The invention belongs to the technical field of sewing equipment, and particularly relates to a laser cutting placket machine. The laser cutting placket machine comprises a sewing machine head, a machine rack, a platen, a presser foot component capable of pressing cloth and driving the cloth to move left and right, and a laser component used for cutting the cloth. The sewing machine head and the laser component are arranged on the same transmission component, and the transmission component is used for driving the sewing machine head and the laser component to move front and back and is arranged on the machine rack. The sewing machine head and the laser component of the laser cutting placket machine share the same driving mechanism, so that the control mode is greatly simplified, control is easier, and cost is lower.

The invention discloses an automatic cable conveying and straightening device. The device comprises a worktable, an inlet guide device, two sets of conveyors and two sets of straighteners; the conveyors comprise inlet conveyors and outlet conveyors with the same structures; the straighteners comprise horizontal straighteners and vertical straighteners with the same structures and perpendicular toeach other; the inlet guide device, the inlet conveyors, the horizontal straighteners, the vertical straighteners and the outlet conveyors are fixed on the worktable in sequence from front to back; and cables pass through the inlet guide device, the inlet conveyors, the horizontal straighteners and the vertical straighteners in sequence, and extend out from the outlet conveyors. Through arrangement of the inlet conveyors, the outlet conveyors, the horizontal straighteners and the vertical straighteners, the cable straightening and conveying automation can be achieved, so that the whole processis high in efficiency, no manpower is needed, and the straightening precision is high.

The invention discloses a telescopic combing device which comprises a body. The body is internally provided with a combing device body. The combing device body comprises a row comb tooth part and a drive rod. The two ends of the row comb tooth part are provided with guide rods respectively. The combing device body is fixed to the body. The row comb tooth part and the drive rod are connected through connection rods. The drive rod is symmetrically provided with linear bearings. The bottom of the drive rod is provided with a plurality of limiting holes. The telescopic combing device is reasonable in structural design, the effect that the row comb tooth part can be adjusted in position in an up-down mode, the application range can be enlarged, and the production cost is reduced.

The invention discloses a split, adjustable and splash-proof range hood with low noise and energy saving. A range hood cover is separated with a draught fan and is connected with the draught fan through a soft air hose and a hard air hose; the draught fan is installed away from a cooking bench or is installed outdoor; a vertical shaft and a horizontal shaft are added; the horizontal shaft can move along the vertical shaft; each of the two ends of the horizontal shaft is provided with a casing which can move left and right and can rotate along the horizontal shaft; connecting plates are arranged at the lateral sides of the casings; a fume hood is fixed on the connecting plates; and in such way, the fume hood can move left and right and up and down or rotate along the horizontal shaft. A screw rod and a motor can also be added to drag the horizontal shaft to move up and down. According to the invention, the split, adjustable and splash-proof range hood with low noise and energy saving has the advantages that influences on physical and mental health of a user caused by noises of the draught fan and the electromagnetic radiation can be avoided; an exhaust opening with the biggest suction of the fume hood can be directly aiming at a frying pan and can be lowered to almost cover the frying pan, so the power of the draught fan can be reduced; the fume hood can also rotate, so splash of hot oil can be prevented; and the cheap fume hood can be made into various shapes with different patterns and is easy to be disassembled for washing and replacing.

The invention discloses a multi-mode semi-active hydraulic suspension which comprises a housing, a rubber main spring, a connecting rod and a rubber bottom membrane, and further comprises a rotating electromagnetic valve, wherein an opening is formed in the top end of the housing; the rubber main spring is arranged in and blocks the opening; the connecting rod penetrates the rubber main spring; the rubber bottom membrane is arranged at the inner bottom of the housing; the housing comprises an upper housing and a lower housing which are connected with each other via bolts; a sealed cavity filled with liquid ethylene glycol is formed between the rubber main spring and the rubber bottom membrane; a partition board dividing the cavity into an upper cavity and a lower cavity is arranged in the cavity; an inertia passage communicated with the upper cavity and the lower cavity is formed in the partition board; a flow block piece is arranged in the inertia passage; the rotating electromagnetic valve is used for driving the flow block piece to rotate. The multi-mode semi-active hydraulic suspension has the advantages that the vibration frequency isolation range can be widened; the vibration isolation effect is improved.

The invention relates to the technical field of mechanical equipment, in particular to a grinding and polishing device, including a base. The device is provided with a mounting chassis under the grinding disc, and a plurality of movable mounting rods are movably installed inside the mounting chassis, and the first gears on both sides of the movable mounting rod The meshing transmission with the sawtooth on the movable installation rod can realize the up and down movement of the movable installation rod, so that the upper and lower positions of the movable installation rod and the mold core mounting plate on the top can be adjusted, and pass through the two sides of the mold core mounting plate The meshing transmission between the sawtooth on the movable connecting rod and the second gear can realize the horizontal movement of the movable clamping plate and achieve the fixed clamping effect on the mold core. In this way, the mold core can be changed on the movable mounting rod The height adjustment on the top can realize the same height of the surface to be ground of the mold cores on different movable installation rods, so that multiple mold cores with different thicknesses can be ground and polished on the same installation chassis at the same time, which can be effectively Improve work efficiency.

The invention provides a quick stripping device applicable to power cables with different thickness specifications, relates to the technical field of cable-related equipment and is to solve the problem that since the distortion degrees of the cables are not uniform during use, if a conventional cable stripping device is adopted, the cables can be easily cut off, the problem that since the thickness specifications of the cables are different, cutters need to be replaced during cable stripping, the stripping device is very inconvenient to use and low in stripping efficiency, and the problem thatlarge-scale automatic equipment for stripping is not suitable for small workshop machining and cost is high. The stripping device comprises a box frame main body. A back plate is vertically, upwardsand fixedly mounted at the edge of the rear end of the box frame main body. According to the device, a blade adjusting screw rod is vertically screwed at the position, corresponding to the center of atray, of the middle part of a blade adjusting mechanism, and the left end of the top plane of the wire stripping mechanism is fixedly provided with a cambered-surface-shaped wire skin removing platein a vertically upward manner, wherein inner concave surface of the wire skin removing plate faces the position of a wire stripping knife, so that when a cable passes through the wire stripping mechanism, stripping can be carried out.

The invention discloses a welding tool for a rear baffle of a vehicle body, and belongs to the technical field of manufacturing of automobiles. The welding tool comprises at least two supporting rods, wherein the at least two supporting rods pass through sliding blocks at the lower end and are oppositely vertically arranged into a chute in a base; the chute is in the same direction as the length direction of the base; workpiece clamps oppositely extend out from the upper ends of the supporting rods and are glidingly connected with the supporting rods through workpiece clamp locking screws. The welding tool can solve the problems of difficult overturning of cylinder, inconvenient operation and high cost in welding of the rear baffle of the existing vehicle body.

The invention discloses an electrodynamic force supply highway traffic system and an electrodynamic force acquisition method. The system comprises a road network power accumulation station network which comprises a live line (201), null lines (202) and a plurality of road network power accumulation stations. The live line (201) is erected over a road, the null lines (202) are erected over the roador laid on the road, and the road network power accumulation stations are connected through a road network power supply circuit, provides electrodynamic force for electric vehicles running on the road through the line (201) erected over a road and leads current out to the null lines (202) erected over the road or laid on the road. The electrodynamic force supply highway traffic system and the electrodynamic force acquisition method have advantages that power supply of common electric vehicles is realized, high-voltage safety power consumption of the electric vehicles is realized, automatic accessing and releasing of the electric vehicles are benefited, and the requirement of the vehicles running on expressways can be met.

The invention discloses a novel protection dam and a protection method thereof, and relates to the technical field of flood prevention and flood fighting. The protection dam comprises a vertical column assembly, baffles and power devices. The column assembly comprises a plurality of convex vertical columns. The baffles are arranged on every two protruding parts of the convex vertical columns in ahanging mode. Each of the baffles comprises one or more folding plates, and is formed by mutual hinged connection of hinge assemblies. Collision-proof rubber layers are arranged on the outer sides ormiddle positions of the folding plates. Each of the hinge assemblies comprises a rotating shaft and a gear mounted on the rotating shaft. Each of the folding plates is provided with one or more sets of power devices. The power devices are arranged at the connecting positions of every two folding plates. Each set of power device includes a motor and a gear at the output end of the motor. The gearsat the output end of the motors mesh with the gears on the rotating shafts of the hinge assemblies. The folding and unfolding of the baffles are realized by the power devices. According to the novel protection dam and the protection method thereof, the problems of large engineering load, limited height, and being unable to block the flood current with a large amount of water and high water level of an existing conventional protection dam are solved.

The invention discloses a nail ordering machine for steel nails and a control method thereof, and belongs to the technical field of nail ordering machines. The technical problem to be solved is to provide a nail ordering machine for steel nails, which is high in automation degree and high in finished product quality. The following technical scheme is adopted: according to the nail ordering machine for the steel nails, a charge drum is fixed on a support; an inclined groove is arranged in the charge drum; the tail end of the inclined groove is connected with an inclined nail ordering rail; one end of the inclined nail ordering rail is located in the charge drum, and the other end of the inclined nail ordering rail is connected with a horizontally-arranged flat rail; a baffle is arranged at the middle of the inclined nail ordering rail; adhesive outlet ports of an adhesive outlet device are arranged in the two sides of the flat rail; and a nail cutting device is installed at the tail end of the flat rail. The nail ordering machine for the steel nails further comprises a nail receiving mechanism, a nail filling device and a nail beating mechanism, wherein an automatic control mechanism is further arranged in the adhesive outlet device. The nail ordering machine for the steel nails, which is disclosed by the invention, realizes high automation, and operation and control for one machine can be easily completed only by one person, thus the labour intensity of workers is reduced, the labour cost is saved, and the finished product quality is further improved.

The invention discloses an unmanned mine drilling and blasting trolley. The unmanned mine drilling and blasting trolley comprises a trolley body. A working cavity is formed in the trolley body, an auxiliary motor is fixedly arranged in the rear wall of the working cavity, and the front end of the auxiliary motor is in power connection with a main shaft. The front end of the main shaft is rotationally connected to the front wall of the working cavity, and a base is rotationally connected to the main shaft. A notch with an upward opening is arranged in the base, and left axles are rotationally connected between the front end of the left side of the base and the front wall of the working cavity and between the rear end of the left side of the base and the rear wall of the working cavity. Thetrolley can automatically move to the position needing to be blasted to conduct punching and explosive filling operation, manual operation is not needed, and the construction safety is guaranteed. When a drill bit is used for drilling, the drill bit can be adjusted in all directions, and multi-angle drilling is facilitated.

The isostatic pressing detector comprises a high-pressure detection water tank, a lifting device is arranged on one side of the high-pressure detection water tank, a lifting plate is installed on a lifting rod of the lifting device, the lifting plate extends to the position above the high-pressure detection water tank, and the high-pressure detection water tank is connected with the lifting device. The lower end face of the lifting plate is further provided with a sealing cover corresponding to the high-pressure detection water tank in position, and the sealing cover can seal the whole high-pressure detection water tank after moving downwards along with the lifting plate. The gas-liquid booster pump is used for pressurization, the ceramic honeycomb carrier in the high-pressure detection water tank is pressurized and crushed through continuous pressurization, the pressure detection sensor detects pressure data changes, isostatic pressing data of the honeycomb ceramic carrier can be conveniently confirmed through cooperation of multiple aspects, the overall structure is reasonable in arrangement, and use is convenient.

The invention provides a safety device of a construction elevator. The safety device comprises a fixed mount, a connecting beam hinged to the fixed mount, a spring steel plate and a trigger plate hinged to the fixed mount, wherein one end of the spring steel plate is fixedly connected with the fixed mount, and the other end is connected with the connecting beam in a sliding manner; the fixed mount is provided with a rising switch, a descending switch and a limiting block, the trigger end of the rising switch is connected with the trigger plate, the trigger end of the descending switch is positioned above the middle part of the spring steel plate, and the limiting block is positioned below the spring steel plate and adjacent to one end, connected with connecting beam in the sliding manner, of the spring steel plate; the trigger plate is provided with a trigger bolt, the trigger bolt is positioned above the connecting beam, and the trigger plate is connected with a height-limiting pole through a lift rope; the connecting beam is connected with the steel lift rope. The safety device of the construction elevator is simple in structure and low in cost, and integrates the functions of limiting weight, limiting height and preventing rope from loosening.

The invention discloses a labor-saving device for carrying out a hand chain hoist no-load action test, which includes a base, an erect support and a controller, wherein a first cantilever, a second cantilever, a third cantilever and a fourth cantilever are sequentially arranged on the erect support from top to bottom and placed in the same vertical plane. The device is characterized in that an electric hoist is arranged below the first cantilever; a pair of first guide mechanisms is arranged on the two sides of the second cantilever; a power mechanism is arranged above the third cantilever; and a pair of second guide mechanisms is arranged on the two sides of the fourth cantilever. The labor-saving device provided by the invention has the following characteristics: firstly, as a pendant point of the hand chain hoist is arranged on a lifting hook of the electric hoist and the lifting hook is vertically adjustable, the hand chain hoist is convenient to take away and place on; secondly, a chain wheel or a friction wheel replaces a driving wheel according to the required friction force of the chain of the hand chain hoist; and thirdly, the structure is simpler, the manufacturing cost is lower, the machining consistency is excellent, and the labor-saving device is suitable for mass production.

The invention provides a rust removal guiding device, and belongs to the technical field of steel bar truss machines. The device comprises a dust removing mechanism, a returning mechanism and a rust removal clearance adjusting mechanism; a first rust removing wheel of the rust removing mechanism is rotatably arranged at one side of a first rust removing wheel support; a second dust removing wheel is rotatably arranged at one side of a second dust removing support; a first sector gear connected with a first rotating shaft is engaged with a second sector gear which is connected with a second rotating shaft; a cylindrical sliding block of the returning mechanism is arranged in a fixing support by sliding leftwards and rightwards; a left returning spring is arranged between a left adjusting plug and the cylindrical sliding block, and while a right returning spring is arranged between the right adjusting plug and the cylindrical sliding block; a clearance adjusting plate of the dust removal clearance adjusting mechanism can swing up and down about a hinging point at the left end; the lower end of a compressing lead screw is in coaxial threaded connection with the second rotating shaft; a butterfly gasket, an adjusting spring and a locking nut are arranged at the upper end of the compressing lead screw. The rust removal guiding device is small in size, and can effectively remove rust on a steel bar.

The invention relates to a hand-push type small-sized snow remover comprising a vehicle shell. A hand grab, an active wheel and a slave wheel are arranged on the vehicle shell; the active wheel is connected with an active shaft; the active shaft is sleeved with an active chain wheel; the vehicle shell is provided with a bottom door; a power assist system A is arranged below the bottom door; a side door is arranged on the front side of the vehicle shell; a spiral snow conveyor is arranged inside the vehicle shell; the spiral snow conveyor is provided with a handle and connected with a clutch and a slave chain wheel; a positioning plate is arranged on the right side of the vehicle shell and connected with a sliding shaft; the outer wall of the sliding shaft is sleeved with a spring connected with a sliding sleeve; the sliding sleeve is connected with a snow shovel; a steel wire rope A and a rubber elastic rope A are hinged to the upper right portion of the snow shovel; a steel wire rope B and a rubber elastic rope B are hinged to the lower right portion of the snow shovel; a slave belt roller shaft is arranged on the lower side of the snow shovel; the outer wall of the slave belt roller shaft is sleeved with a scraper belt; a scraper belt raised strip is arranged on the outer side wall of the scraper belt; the scraper belt is connected with a supporting roller shaft; and a power assist system B is arranged on the lower side of the vehicle shell. The hand-push type small-sized snow remover has the advantages that the structure is simple, energy saving and environmental protection are achieved, and maneuverability is good.

The invention provides a production process of a wormwood fiber and wool fiber blended yarn, and belongs to the technical field of textile. The production process comprises the following steps of 1, wool pretreatment; 2, carding the wool, namely carding the pretreated wool in a carding machine, and removing impurities; 3, drawing, namely drawing the carded wool and wormwood fibers by using a drawing frame to form blended strips; 4, drawing and grinding strips, namely, drawing and grinding the blended strips formed after drawing by using special drawing and grinding strip equipment; 5, roving,wherein roving processing is conducted on reinforced blended strips formed after drawing and grinding; 6, spinning, wherein spinning processing is conducted on the mixed yarn formed through roving processing; 7, yarn steaming, wherein the yarn obtained after spinning processing is subjected to yarn steaming treatment; and 8, performing spooling. By adopting a special process, the strength of the wormwood fiber and wool fiber blended yarn is greatly improved, and the service life of the wormwood fiber and wool fiber blended yarn is prolonged.

The invention provides a melt-blown fabric segmented cutting machine for mask production and relates to the field of mask production. The melt-blown fabric segmented cutting machine for mask production comprises a rack, wherein a lower cross beam is fixedly connected to the inner side of the rack, a motor is fixedly connected to the upper surface of the lower cross beam, a first bracket, a second bracket, a third bracket, a carrier rack and a stripping rack are fixedly connected to the upper surface of the rack from right to left in sequence, a fifth bracket is fixedly connected to the back wall of the rack, and a tensioning wheel is rotatably connected to the inner wall of the first bracket. By wrenching an adjusting handwheel, the tensioning force of a melt-blown fabric can be adjusted when rolled. By arranging a meter counting device, the metering counting device outputs a signal to a roll feeding device, a product pushing device and a cut-off device to move by reaching a set meter. The set roll feeding device can provide roll cores automatically and continuously, and the cut-off device cuts off air cylinder movement after the product pushing device pushes the product rolls below the carrier rack so as to drive a slicer to cut off and wind the melt-blown fabric.

The invention discloses a multifunctional juicer, and relates to the technical field of household appliances. A first mounting opening provided with a first top cover is formed in the top of a juicingchamber, the upper end of a filter screen is fixed to the first top cover, and a bottom plate is arranged at the lower end of the filter screen; a torque transmission shaft is installed on the bottomplate, the upper end of the torque transmission shaft is in key connection with a tool bit, and the lower end of the torque transmission shaft is in key connection with the torque output end of the motor. The first top cover is provided with a second mounting port leading into the filter screen from top to bottom, the second mounting port is provided with a second top cover, and the second top cover is connected with a pressing plate with pricking cones through a length-adjustable connecting rod; a driving chamber is provided with vent holes, and fan blades are installed on a rotating shaft of the motor. When the juicer is used for juicing, the fan blades rotate to generate wind, and then the circuit board and the motor can be cooled; the pressing plate can downwards apply proper pressureto the fruits and vegetables in the filter screen, so that the juicing efficiency can be manually improved; all structural components in the juicing chamber can be taken out from the first mounting opening, and disassembly and assembly are convenient, and maintenance is facilitated.

The invention relates to a flaring test tool which comprises a support and an ejector core, the support is provided with a supporting part used for positioning and supporting a sample upwards, and an ejector core penetrating hole is formed in the position, above the supporting part, of the support; the ejector core is guided to penetrate into the ejector core through hole in the vertical direction, the ejector core comprises a flaring conical head at the lower end, the flaring conical head is used for being jacked into a sample, the sample is flared by the flaring conical head when the ejector core moves downwards relative to the sample, and the upper end of the ejector core is located above the upper end face of the support; the flaring test tool further comprises a limiting stop piece arranged on the ejector core, and the limiting stop piece is used for being in stop fit with the upper end face of the support in the vertical direction so as to limit the downward movement stroke of the ejector core relative to the sample. Before a test, the distance between the limiting stop piece and the upper end face of the support only needs to be guaranteed to be a set value, it can be guaranteed that the flaring amount of the sample is consistent with the preset flaring amount, horizontal limitation of operators is avoided, and use is more convenient.

The invention discloses a flexible adjustable electric steamer. The electric steamer comprises a bottom pot body, wherein the bottom pot body is provided with a water holding cavity and a heater which is positioned under the water holding cavity and arranged close to the water holding cavity; a first dish steaming layer is arranged at the upper part of the water holding cavity, and comprises a side plate and a bottom plate with steaming holes; four supporting columns are uniformly arranged on the edges of the upper surface of the bottom plate, and a movable steaming hole plate is supported against the top ends of the four supporting columns; each supporting column comprises a lower hollow supporting column section and an upper movable supporting column section; the lower end of each lower hollow supporting column section is fixed on the bottom plate, and inner threads are formed in the inner surface of each lower hollow supporting column section; outer thread are formed in the outer surface of each upper movable supporting column section; and the upper movable supporting column section is in screwed connection into the correspondingly lower hollow supporting column section. By adopting the mode, the flexible adjustable electric steamer is simple and reasonable in structure, and is flexible and practical since the position of the movable steaming hole plate can be adjusted up and down.

The invention discloses a method for welding a rear bumper of a vehicle body, and belongs to the technical field of vehicle production. A tool for welding the rear bumper of the vehicle body is used in the method. The method includes: a, clamping the to-be-welded rear bumper of the vehicle body; b, loosening support rod locking screws, and adjusting the distance between support rods to enable welding portions to be folded and fastened; c, loosening movable-sleeve locking screws and workpiece compression screws to enable to-be-welded end faces to be flushed with each other, adjusting the end faces to proper welding positions, and fastening the movable-sleeve locking screws and the workpiece compression screws for positioning; d, welding one of the end faces automatically by a welding machine; e, loosening the movable-sleeve locking screws, rotating chucks by 180 degrees simultaneously, and fastening the movable-sleeve locking screws for positioning; f, welding the other end face automatically by the welding machine to complete welding. By the method, the problems of difficulty in overturning of air cylinders, inconvenience in operation and high cost in welding of the rear bumper of the vehicle body in the prior art can be solved.

The invention provides a safety device of a construction elevator. The safety device comprises a fixed mount, a connecting beam hinged to the fixed mount, a spring steel plate and a trigger plate hinged to the fixed mount, wherein one end of the spring steel plate is fixedly connected with the fixed mount, and the other end is connected with the connecting beam in a sliding manner; the fixed mount is provided with a rising switch, a descending switch and a limiting block, the trigger end of the rising switch is connected with the trigger plate, the trigger end of the descending switch is positioned above the middle part of the spring steel plate, and the limiting block is positioned below the spring steel plate and adjacent to one end, connected with connecting beam in the sliding manner, of the spring steel plate; the trigger plate is provided with a trigger bolt, the trigger bolt is positioned above the connecting beam, and the trigger plate is connected with a height-limiting pole through a lift rope; the connecting beam is connected with the steel lift rope. The safety device of the construction elevator is simple in structure and low in cost, and integrates the functions of limiting weight, limiting height and preventing rope from loosening.