90results about How to "Avoid the dangers of working at heights" patented technology

The invention discloses an automatic pipeline cleaner and an application method thereof. The automatic pipeline cleaner comprises clamp mechanisms, a telescoping mechanism and a cleaning mechanism. The upper clamp mechanism and the lower clamp mechanism are mounted at two ends of the telescoping mechanism. The cleaning mechanism is mounted on the clamp mechanisms. The automatic pipeline cleaner specifically comprises a left claw, a right claw, a fixed support, a connecting rod, a drive rod, a clamp motor, a telescoping motor, a first telescoping rod, a second telescoping rod, a screw rod, a pushing plate, a worm gear, a worm, a transmission shaft, a cleaning nozzle and a rubber tube. The clamp mechanism and the telescoping mechanism can climb along a rod while the cleaning mechanism continuously sprays detergent for cleaning. The automatic pipeline cleaner is simple to use, low in technical requirements for workers, high in production efficiency, simple to machine, low in cost, suitable for cleaning of infrastructures such as street lamps, telegraph poles, advertizing board supports and petroleum pipelines, and capable of completing climbing and cleaning.

The invention discloses an automatic wall-building machine, characterized by comprising a longitudinal movement mechanism (A), a transverse movement mechanism (B), a vertical lifting mechanism (C), a brick conveying mechanism (D), a mortar spraying mechanism (E), and a brick discharging mechanism (F). The longitudinal movement mechanism (A) comprises two guide rails (4) which are parallel. A first bottom plate (3) is slidably fitted on the two guide rails (4). The transverse movement mechanism (B) comprises a second bottom plate (13) which is mounted on the first bottom plate (3) through a moving slide rail (9). A horizontal movement direction of the moving slide rail (9) is parallel to that of the first bottom plate (3). The vertical lifting mechanism (C) is arranged on the second bottom plate (13). The brick conveying mechanism (D), the mortar spraying mechanism (E) and the brick discharging mechanism (F) are arranged on the vertical lifting mechanism (C). The brick conveying mechanism (D) is used for conveying bricks. A conveying exit of the brick conveying mechanism (D) is located opposing a discharge exit of the brick discharging mechanism (F). A mortar spout of the mortar spraying mechanism (E) exactly faces the discharge exit of the brick discharging mechanism (F).

The invention relates to a street lamp with the elevating function, which comprises a lamp, a base rod, an elevating system and an elevating rod, wherein the base rod is a hollow cylinder; the elevating system is positioned inside the base rod and comprises a first gear, a second gear, a first rack bar, a second rack bar and a connecting rod; the first gear and the second gear are fixed at both ends of the connecting rod respectively; the elevating system is meshed with the corresponding rack bar through the first gear and the second gear to achieve elevating; and the upper part of the elevating rod is connected with the lamp, while the lower part is connected to the elevating system and driven by the elevating system to move. The street lamp with the elevating function not only can conveniently wipe the lamps or can maintain the street lamp on the ground, has the advantages of time and labor saving and small labor intensity, but also can avoid danger of aerial work at the same time. The irradiation area of the street lamp can be easily adjusted.

The invention relates to a space truss platform for round building construction. A plurality of steel frame units are spliced along the circumferential direction into a stable conical platform space structure by connectors, wherein the steel frame units are arranged along the radial direction of the stable conical platform. Each steel frame unit comprises an upper cord pull rod on the side of the stable conical platform, a lower cord pull rod at the bottom of the stable conical platform, a first profile steel web member and a second profile steel web member which are in the inner cavity of the stable conical platform, and first, second and third reinforcing steel bar prestressed pull rods to which prestress can be applied. Each connector comprises an upper pressure ring, a lower pressure ring, an enclosure, an upper circumferential-direction connecting rod and a lower circumferential-direction connecting rod. Pressed rods are rigid rods (profile steel), pull rods are flexible rods (round bar steel) and prestress can be applied to the pull rods. The invention also relates to a method for constructing a round building by using the space truss platform, wherein the platform has two functions; in slide form on a cylinder wall, the platform functions as a slip form platform; in top cover construction, the platform functions as a form supporting platform. The space truss platform is assembled in field, is simple in structure, high in bearing capacity and convenient to assemble and disassemble and can be reused.

The invention discloses a cable-driving rope replacing mechanism. A rope replacing winch is arranged beside a fixed side of a cable-driving winch rope. A ground guide pulley is arranged on ground under a cable-driving part port entering platform. A maintenance guide pulley is arranged on the cable-driving part port entering platform. One end of a first craft steel wire rope bypasses the maintenance guide pulley and the ground guide pulley and is coiled on a winch coiling block of the rope replacing mechanism, and the other end of the first craft steel wire rope is fixed at the anchoring device end of a cable-driving rope. A coiling disk of a second craft steel wire rope is placed beside a cable-driving winch. Hand pulling blocks are respectively arranged on the cable-driving winch, a rope replacing mechanism winch and the cable-driving part port entering platform. The cable-driving rope replacing mechanism has the advantages that at rope replacing time, only operation in a drive winch machine chamber on ground and the port entering platform is needed, so that risks of working aloft and damage of auxiliary parts falling off a rope to a ground part are avoided; no large hoisting equipment is needed, and only the hand pulling blocks are needed as outer force assistance, so that replacing cost is reduced; the efficiency, the safety and the reliability of rope replacement are improved.

The invention relates to a circular column verticality detecting method. The method uses a total station to measure three points of two interfaces on a bridge column, calculates center coordinates ofthe interface from three points, and compares the left sides of centers of two sections to obtain the maximum offset and perpendicularity of the circular column; the method effectively solves the complicated operation in the process of detecting the verticality of the circular column and does not need to work at heights, can accurately measure the verticality and the deviation direction of the circular column, saves human resources, improves the accuracy of the date, and has the advantages of simple principle, convenient and fast operation, accurate and accurate data, strong practicality and wide applicability.

The invention discloses a gas tightness detection and replacement device for a glass curtain wall. The gas tightness detection and replacement device for the glass curtain wall comprises a machine body, wherein a detachment cavity is formed in the machine body; a detachment plate capable of sliding to the left and right is arranged in the detachment cavity; cross frames forming sealing are arranged on the right end surface of the machine body in the form of up-down symmetry; curtain wall glass is fixedly arranged between the upper cross frame and the lower cross frame; and a sealed detection cavity is formed among the cross frames, the curtain wall glass and the right end surface of the machine body. According to the gas tightness detection and replacement device for the glass curtain wall, by unfolding a glass piece falling-off prevention device, injury to people due to the falling-off of glass during gas tightness detection can be effectively prevented, and meanwhile, detection for the glass curtain wall can be completed in a room, so that the danger of aerial working of workers is avoided, improvement for the working environment of overhaul personnel is benefited, and the life safety of the overhaul personnel is guaranteed; and meanwhile, by virtue of the device, the glass needing to be replaced can be stably detached, and glass pieces are prevented from falling off from upper air to injure people, and overhaul and replacement are integrated, so that the working efficiency of the workers is increased.

The invention discloses a percussion drill support for overhead drilling construction. The percussion drill support is suitable for overhead drilling on the bottom of a beam and slab. The percussion drill support comprises a force application mechanism, a layer height adjustment mechanism, and a percussion drill fixing mechanism. The force application mechanism is a four-connecting-rod mechanism composed of a floor standing post, a horizontal force application rod, a moving standing post and a horizontal connecting rod. A lever mechanism is formed by the floor standing post and the horizontal force application rod. The layer height adjustment mechanism comprises a support connecting pipe and a layer height adjusting rod. Two ends of the layer height adjusting rod is slidingly connected with the support connecting pipe and the moving standing post through clamping nuts. The percussion drill fixing mechanism comprises a support and a binding rigging. The support is fixed onto the support connecting pipe. The percussion drill support is safe and convenient to construct, labor-saving to operate, and effective in improving working environment.

A push-pull type wall surface greening device comprises a long-strip semi-box-type upper baffle fixedly installed on the upper edge of an outer window of a building and a long-strip semi-box-type lower groove fixedly installed in the lower edge of the outer window of the building. A plurality of rolling shafts are fixedly installed in the lower groove. A water falling pipe is communicated with the lower groove. A planting frame is installed between the upper baffle and the lower groove in a sliding mode. The rolling shafts are fixedly installed at bottom of the planting frame. A plurality of layers of partition frames are arranged in the planting frame. Planting grooves with drainage holes are formed in the partition frames. Upper vertical rolling wheels are fixed to the face against a wall and the free faces of the upper portion of the planting frame. The push-pull type wall surface greening device and the greening method thereof can solve the problem about later maintenance of existing wall surface greening, and maintaining cost is low. According to the push-pull type wall surface greening device and the greening method thereof, common domestic households in a city can green outer wall surfaces of their real estates, and the enthusiasm of urban citizens to participate in building external wall greening is improved.

The invention relates to an LED solar intelligent light-controlled street lamp and a use method thereof. The street lamp comprises a power supply module, a control module, an illumination lamp, a lamprod and a lifting device, wherein the power supply module is electrically connected with the illumination lamp, and control module is connected with the power supply module and the illumination lamp,respectively; and illumination lamp is fixed on the lamp rod through a amp frame. According to the use method, luminance signals and sound wave signals are simultaneously collected by virtue of a light-controlled inductor and a sound-controlled inductor, and the regulation and control of the illumination lamp are controlled by the controller through two indexes, namely luminance and sound waves,so that the wasting of energy source is avoided, and the energy conservation and the environmental protection are realized. According to the street lamp provided by the invention, the problems that the energy source of existing street lamps is wasted, the blindness of the manual polling of the street lamp operation condition is large, and the time and the force wasted for maintaining street lampswhich are most arranged at high places are solved; and the street lamp has the advantages of good stability, long service life, high luminous efficiency, simplicity and convenience in mounting and maintenance, energy saving, environmental friendliness and the like and can be applied to the places such as urban secondary main roads, urban secondary main roads, residential areas, factories, touristspots and parking lots.

The invention discloses an outdoor antenna, and the antenna comprises a base, a substrate disposed on the base, a supporting column disposed on the substrate, and an antenna assembly disposed at the top of the supporting column. The top of the supporting column is provided with an installation platform, and the outer wall of the supporting column is provided with a groove. The supporting column is sleeved by a cutting sleeve, and the cutting sleeve is provided with a cutter disposed in the groove. The cutting sleeve is also provided with a first magnet. The interior of the inner cavity of the supporting column is provided with an annular traction part, and the outer wall of the traction part is provided with a second magnet and a traction rope. The traction rope extends downwards after being wound around a pulley at the top of the supporting column, and is connected with a rope coiling device. The antenna provided by the invention can cut the rope wound around the supporting column conveniently, and avoids the danger caused by high-altitude operation.

The invention discloses an adhesive sticker sign mounting tool and relates to the technical fields of sign pasting and power construction. The adhesive sticker sign mounting tool comprises a handheld rod, a cross rod, a fixed plate and a pressing and expanding roller, wherein the board of the fixed plate is vertical to the central axis of the cross rod, and the fixed plate is slidably connected with one end of the cross rod by virtue of an elastic slip connection structure, so that the fixed plate can slide along the central axis direction of the cross rod; the pressing and expanding roller is symmetrically arranged at the two sides of the fixed plate, a rotary shaft of the pressing and expanding roller is connected with one end of a roller connecting rod, and the other end of the roller connecting rod is articulated with the outer side of the cross rod, so that the pressing and expanding wheel can rotate around an articulated shaft in the plane where the long axis of the cross rod is located; and a flexible roller spring is also arranged between the roller connecting rod and the cross rod and used for controlling the rotation amplitude of the pressing and expanding wheel. The adhesive sticker sign mounting tool is simple in structure and easy to use, risks of climbing operation can be avoided, and the whole operation process is remarkably smooth, so that labour cost and time cost are greatly saved.

The invention relates to a power insulator maintenance construction system and a construction method. The system comprises a walking mechanism, a lifting mechanism, a loosening mechanism and a replacing mechanism. The walking mechanism can move the lifting mechanism, the loosening mechanism and the replacing mechanism to the position below an insulator chain, the lifting mechanism can lift the loosening mechanism and the replacing mechanism to the insulator replacing working height, and the to-be-replaced insulator chain can be loosened through the loosening mechanism, so that the to-be-replaced insulator can move relative to the adjacent insulator, and the replacing mechanism can replace the to-be-replaced insulator and recycle the damaged insulator. According to the invention, the loosening mechanism is controlled by the electric pole to loosen a plurality of insulators, and compared with an existing manual screw rod loosening mechanism, time waste caused by disassembly and assembly of loosening equipment during replacement of the plurality of insulators is avoided; according to the invention, the insulators are stored and replaced through the insulator storage mechanism, so a plurality of insulators can be replaced through one-time work of equipment, the method that only one insulator can be manually replaced at a time in the past is replaced, and manpower is saved while the working efficiency is improved.

The invention provides a transverse mounting method for a prefabricated modular elevator. According to the transverse mounting method, a traditional elevator vertical mounting process is completely innovated, the elevator is installed in a steel frame in a transverse horizontal laying state to form the prefabricated modular elevator, quick and precise installation of the elevator can be realized by hoisting the prefabricated modular elevator, the technological progress of innovation is achieved, and practical application value of the elevator in the field of elevator machining which cannot beneglected is achieved.

The present invention relates to an insulator deterioration detection device which comprises a UAV (unmanned aerial vehicle), a camera device, a spark fork, a remote control device and a data receiving device. The UAV comprises an aircraft, a control device and a communication device. The remote control device transmits a remote control signal to the communication device. The communication device forwards the remote control signal to the control device. The control device controls the running state of the aircraft and the running state of the camera device according to the remote control signal. The camera device and the spark fork are installed on the aircraft. The camera can shoot the spark fork, an taken image can be transmitted to the data receiving device through the control device and the communication device, the detection personnel controls the UAV just through the remote control device and the data receiving device, insulators can be detected piece by piece, the detection personnel do not need to climb a tower, the detection efficiency is higher, and the risk of a high-altitude operation is avoided.

The invention discloses an automatic wall-building machine, characterized by comprising a longitudinal movement mechanism (A), a transverse movement mechanism (B), a vertical lifting mechanism (C), a brick conveying mechanism (D), a mortar spraying mechanism (E), and a brick discharging mechanism (F). The longitudinal movement mechanism (A) comprises two guide rails (4) which are parallel. A first bottom plate (3) is slidably fitted on the two guide rails (4). The transverse movement mechanism (B) comprises a second bottom plate (13) which is mounted on the first bottom plate (3) through a moving slide rail (9). A horizontal movement direction of the moving slide rail (9) is parallel to that of the first bottom plate (3). The vertical lifting mechanism (C) is arranged on the second bottom plate (13). The brick conveying mechanism (D), the mortar spraying mechanism (E) and the brick discharging mechanism (F) are arranged on the vertical lifting mechanism (C). The brick conveying mechanism (D) is used for conveying bricks. A conveying exit of the brick conveying mechanism (D) is located opposing a discharge exit of the brick discharging mechanism (F). A mortar spout of the mortar spraying mechanism (E) exactly faces the discharge exit of the brick discharging mechanism (F).

The invention relates to a full-automatic hoisting conveying system before organic garbage spray explosion treatment. The full-automatic hoisting conveying system comprises a hoisting rack, a horizontal conveying rack and a material feeding bucket which contains garbage, wherein two ends of the horizontal conveying rack are erected on the hoisting rack and above an explosion machine supporting frame, and an explosion machine is arranged at the upper end of the explosion machine supporting frame; and a hoisting mechanism used for hoisting the material feeding bucket to a high position from a low position is arranged on the hoisting rack, and a horizontal conveying mechanism used for carrying the material feeding bucket hoisted to the high position to the explosion machine position is arranged on the horizontal conveying rack. By adopting the device provided by the invention, each feeding process is composed of two continuous stages, namely vertical hoisting and horizontal conveying, full-automatic detection and control is adopted during hoisting and conveying, and personnel does not need to participate in the whole course, so that the organic garbage conveying speed is greatly increased, the production labor intensity of a worker is reduced, the risk of the personnel during high-altitude operation is also avoided, interference of human factors on the conveying system is reduced, and the probability that an accident appears is reduced.

The invention relates to the technical field of garden machinery and concretely relates to a tree trimmer comprising a driving motor, a telescopic rack, a rack installation seat, a cutting blade, a left fixing sheet, a rotating shaft, a right fixing sheet and an elastic member. The driving motor is installed on the bottom of the telescopic rack; the telescopic rack is fixed on the bottom of the rack installation seat; the rack installation seat is welded on the front end of the left fixing sheet; the cutting blade is installed on the driving motor; the elastic member is welded on the tail end of the left fixing sheet; and the right fixing sheet is fixed on the rack installation seat via the rotating shaft. A tree trunk can be tightly held by the left fixing sheet and the right fixing sheet; driven by the driving motor, the cutting blade can automatically cut branches, so trimming work by worker climbing in a traditional mode can be avoided, and therefore work safety can be greatly enhanced; and work aloft danger can be prevented.

The invention relates to the technical field of oil field oil extraction, and discloses a tower type pumping unit. The tower type pumping unit comprises a supporting base, a tower arranged on the supporting base, a belt, a weight box and a driving system, wherein the driving system is fixedly connected to the weight box, a front guide wheel, a rear guide wheel, a front belt fixing clamp and a rearbelt fixing clamp are fixedly installed on a platform, a reversing movable pulley is arranged below the tower platform, the driving system comprises a motor and a roller, one end of the belt is fixedto the rear belt fixing clamp, the other end of the belt bypasses the roller from bottom to top, bypasses the upper portions of the rear guide wheel and the front guide wheel, then bypasses the reversing movable pulley from top to bottom and then is fixed to the front belt fixing clamp. According to the tower type pumping unit, the danger of high-altitude operation is avoided, when the pumping unit is in maintenance operation, a crane does not need for cooperation, maintenance is convenient, the maintenance time and cost are saved, the working efficiency is improved, and the weights of the driving system and a speed reducing device act on the weight box, so that the filling of counterweight iron is reduced, and resources are saved.

The invention belongs to the technical field of optical fiber exchange boxes, and particularly relates to an optical fiber exchange box for communication engineering construction, which comprises a main body, heat dissipation holes for heat dissipation are formed in two ends of the main body, the lower end of the main body is connected with a connecting bottom plate through a sliding block, and a sliding groove for limiting and sliding the main body is formed in the connecting bottom plate. Through the arrangement of the side vertical connecting plate, the side vertical connecting plate is driven by a motor at the lower end, so that the side vertical connecting plate is fixed to a wall surface in a threaded mode through a transmission rod, the effect of conveniently installing and fixing the main body is achieved, and the danger of long-time high-altitude operation is effectively avoided; and through arrangement of a connecting bottom plate, the connecting bottom plate drives a transmission lead screw to rotate through a motor at the lower end, so that the position of the main body is adjusted, the position of the main body is conveniently adjusted according to weather conditions, the information transmissibility of the main body is improved, and meanwhile, the flexibility of the main body is improved.

The invention relates to a monopole mobile bus connector which at least comprises a mobile platform and a raising platform arranged on the mobile platform; the raising platform is provided with a group of isolating switches; the upper end of the isolating switch is provided with a clamp capable of clamping an upper bus; the mobile platform is fixedly provided with a supporting insulator, and two ends of a flexible conductor are respectively connected with the isolating switch and the supporting insulator; a mobile supporting insulator is transversally installed on the raising platform below the flexible conductor; the lower part of the mobile platform is provided with mobile wheels, and supporting legs which can be unfolded for positioning and fixing are also arranged below the mobile platform. The connector is characterized by simple structure, convenient use, safety and reliability, beautiful and neat whole body and conveniently accessing DC ice-melting current to different lines needing ice-melting, and the like.

The invention belongs to the technical field of tree packing machines, and particularly relates to a frame type lifting tall tree packing machine. The frame type lifting tall tree packing machine comprises a crawler base plate, a power station, a cab and a frame type lifting mechanism, wherein the power station, the cab and the frame type lifting mechanism are sequentially mounted on the crawler base plate from back to front, and a packaging mechanism is fixedly mounted at the top of the frame type lifting mechanism through a connecting beam; and a clamping mechanism for clamping scattered branches is mounted on the packaging mechanism. The frame type lifting mechanism is adopted, so that the packing machine is small in size and compact in structure, tall trees can be packed, the danger of high-altitude operation is effectively avoided, and the working intensity of garden workers is reduced; and meanwhile, when the frame type lifting mechanism ascends, the packaging mechanism can package the trees, the function of automatically packaging the trees is achieved, the packaging work efficiency is greatly improved, and the packaging cost is saved.

The invention specifically relates to a drone that can be used to clean high-altitude glass, including a drone body, a working platform, a cleaning device, a negative pressure suction device, and a control box. The working platform is fixed below the drone body. The cleaning device is arranged on the working platform, and the negative pressure suction device includes a first negative pressure suction device and a second negative pressure suction device respectively arranged on the left and right sides of the front end of the working platform, and the control box is arranged on the working platform. Above the platform, the cleaning device includes a cleaning brush assembly that can move left and right and a mechanical arm that can control the overall movement of the cleaning brush assembly. When the drone of the present invention is used to clean high-altitude glass, the activity of the cleaning device is more flexible, the cleaning ability is greatly improved, and the effect of cleaning without dead ends can be realized.

The invention discloses a curtain wall which comprises a plurality of curtain wall units, wherein the curtain wall units are distributed in a rank manner; each curtain wall unit comprises a macroplate, an interlaminar plate, a left keel component and a right keel component; the left keel components and the right keel components are fixedly connected with a beam; each left keel component comprises an accommodating groove facing toward the beam; each right keel component comprises an accommodating groove facing toward the beam; and the two ends of the macroplates and the interlaminar plates are fixedly connected with connecting pieces arranged in the accommodating grooves of the left keel components and the right keel components respectively. The curtain wall can be mounted from the interior of a room; the mounting cost and the maintenance and replacement cost of glass are lowered effectively; and a safety risk of a mounting worker can be reduced.

The invention provides a project slope quality detection method based on an aerial robot. The method comprises steps as follows: information acquisition: knocking an initial working face among multiple pre-divided working faces of a project slope by the aerial robot to acquire vibration information of the initial working face after knocking; defect judgment: judging whether the initial working face has defects or not according to the vibration information; cyclic detection: sequentially detecting the rest multiple working faces one by one with the methods in the two steps. The invention further provides a project slope quality detection system based on the aerial robot. With the adoption of the method and the system, the detection accuracy and detection efficiency can be improved, and the detection safety is greatly improved.

The invention discloses an automatic washing device for a high-rise glass curtain wall and a washing method for the same. The device comprises a water storage tank, a valve body A, a valve body B, a valve body C, a valve body D, a water pipe, a hydraulic pipe, a top cover, a piston, a three-way connector, a steel wire rope, multiple fixed pulleys, a pair of guide rails, a brush and a water spraying pipe. According to the invention, rainwater is collected on a roof, position potential energy of the stored rainwater and pressure intensity potential energy converted from the position potential energy are applied directly, and power and water used for washing are provided for the device by a hydraulic transmission mechanism, so that consumption of energy sources and the water used for the washing can be reduced; manual washing is replaced by a mechanical and automatic manner, and dangers in workers' aerial operations and high operation cost can be avoided; and rainwater resources can be applied rationally and efficiently, and national calling for innovation, energy saving and emission reduction can be responded positively.

The invention discloses a liftable LED street lamp convenient to operate. The liftable LED street lamp comprises an adjusting cylinder, a telescopic rod, supports and lamp bodies, wherein the telescopic rod is arranged above the adjusting cylinder; two sides of the telescopic rod are fixedly connected with the supports respectively; one end of each support is fixedly connected with the corresponding lamp body; the top end of the telescopic rod is fixedly connected with a storage battery; the upper part of the storage battery is fixedly connected with a solar cell panel through solar supports;the interior of each lamp body is provided with an LED substrate; the upper part of each LED substrate is electrically connected with an LED driver; and cooling fans are arranged on two sides above the interior of each lamp body respectively. The liftable LED street lamp is simple in structure and novel in design, the height of the device can be adjusted through the arranged adjusting cylinder andtelescopic rod, the device can be installed by workers conveniently, meanwhile, the device can be maintained and cared by workers conveniently in the later period, the convenient effect is increased,the danger caused by high-altitude operation of the workers is avoided, and the liftable LED street lamp has the good popularization value.

The invention belongs to the technical field of crane manufacturing and relates to a quick-assembly tower crane. The quick-assembly tower crane comprises an upper tower body and a lower tower body, wherein the upper tower body can be compressed into the lower tower body, so that a telescopic structure is formed; the tower bodies are compressed or stretched through a tail inhaul cable system. Tower arms include a front tower arm and a rear tower arm which are connected through a pin shaft, and the tower arms are folded leftwards and rightwards through an arm unfolding rope. The first section at the bottom of each tower body is arranged to be of an isosceles right triangle structure, and the bottom of the lower tower body is of a foldable structure in a pin shaft connection mode. Meanwhile, two erection rods are arranged to maintain the overall stability of the tower crane. The tower crane is assembled quickly through the tail inhaul cable system, a raising and winching system, a rotation system and the arm unfolding rope system. The quick-assembly tower crane has the advantages of being quick in assembling, safe in operation, low in cost, convenient to use and the like.

The invention discloses a municipal environmental protection street lamp with a self-cleaning function. The lamp comprises a street lamp body, a solar panel is fixedly connected to the outer side wall of the street lamp body, a cleaning mechanism is arranged on the solar panel, and a lighting and insect repelling mechanism is fixedly connected to the outer side wall of the street lamp body. And the cleaning mechanism comprises a rotating motor, the output shaft end of the rotating motor is fixedly connected with a rotating plate, and the top of the rotating plate is fixedly connected with a first rotating shaft. By turning on a rotating motor, the rotating motor can drive the output shaft to rotate, a second rotating shaft pushes or pulls a sliding plate to slide left and right on a first connecting rod, the sliding plate can drive a wiping block to swing left and right through a pressing rod, and the wiping block is pressed on the top of the solar panel by a pressure spring; and the wiping block swings left and right to press and wipe the top of the solar panel in a left-right swinging manner, so that the solar panel can be conveniently cleaned, and the danger of high-altitude operation of workers is avoided.

The invention discloses a height limiting board used for road construction. The height limiting board comprises a crossbeam. An LED display screen is fixedly connected to the middle portion of the crossbeam. A first installation box and a second installation box are welded to the two ends of the crossbeam. The end, close to the second installation box, of the crossbeam is fixedly connected with astorage battery. The end, close to the first installation box, of the crossbeam is fixedly connected with a motor. A transmission shaft is rotationally connected to the inner portion of the first installation box. The end, close to the motor, of the transmission shaft is connected with a shaft sleeve in a sliding mode. The shaft sleeve is fixedly connected with an output shaft of the motor. A clamping groove is formed in the shaft sleeve. The outer side of the end, close to the motor, of the transmission shaft is sleeved with a snap ring. The height limiting board is novel in structure, the limiting height can be adjusted freely according to requirements, the height limiting board can be installed at a low height initially, after being installed on the ground, the height limiting board canascend to the required height through transmission of friction wheels, danger of upper-air operation is avoided, and meanwhile the LED display screen can be used brightly day and night.