CN2737766Y - Electric lightweight tower crane - Google Patents

Abstract

An electric lightweight tower crane is characterized in that the utility model is provided with a pylon whose root is fixed on foundation; the bottom of the pylon is provided with a fixed bull gear dish and a load bearing sheathed on the pylon; an outer sleeve fixedly connected with the outer ring of the load bearing is fixedly connected with a machine frame; the machine frame is provided with an arm-rising reel cart, a crab winch and a control stand; the machine frame is also provided with a turning pinion driven by a turning motor-speed changer; the turning pinion is engaged with the bull gear dish; the tail end of the boom is hinged to the outer sleeve of the load bearing; the head end of the boom is provided with a gin wheel; an arm-rising pulley is arranged between the tail end and the head end of the arm; the top of the pylon is sleeved with a suspension bearing. The outer sleeve fixedly connected with the outer ring of the suspension bearing is fixedly connected with a pulley block along with the and the outer sleeve is provided with earrings connected with a turning arm; the other end of the turning arm is connected to a turning pulley. The steel cable of the crab winch is passed and connected with the pulley on the top of the pylon and a bucket grab at the back of the gin wheel; the steel cable of the arm-rising reel cart is connected with the pulley on the top of the pylon, the arm-rising pulley and the turning pulley.

Description

A kind of electronic light tower hoist

Technical field

The utility model relates to the tower crane of hoisting heavy, and particularly a kind of being used for waited the surface water pollution administration project in ingoing river pollution control, and a kind of electronic light tower hoist of clearing is tackled, precipitates, salvaged to the rubbish foreign material and the silt that carry in the river.

Background technology

Pollute in the administration project such as surface water pollution such as control grade at ingoing river, the rubbish foreign material and the silt that carry in the river are tackled, precipitate, salvaged to clear be the basic working procedure of primary purifying.This dirt, necessary supporting simple, the practical long-armed tower crane of the incorporate stream pollution control of desilting technology of blocking, by its operation mud grab bucket rubbish foreign material and mud in the timely Salvage and Wreck Removal sludge pan, in order to avoid cause garbage barrier net to stop up or the rubbish foreign material rot to pollute.The general integral installation of known tower crane when tower crane produces very big moment to turntable bearing during with maximum working radius lifting weight, is had relatively high expectations to the turntable bearing mechanical strength on turntable bearing on the one hand, causes the wearing and tearing of turntable bearing on the other hand easily.And the turntable bearing expensive component that is tower crane, thereby the cost of general tower crane and over-the-road expense are all than higher.On the market tower crane price of swinging radius 10m, load 1000kg generally up to 150,000 yuan about, and adopt hydrostatic drive mostly, operating maintenance is comparatively complicated, also there are environmental problems such as oil pollution in main engine power more than 10kW; General tower crane is taked high-order horizontal hanging arm, the center of gravity height, and safety is relatively poor; The hold-down arm of traction arm is shorter, and angle is very little between arm and carrying cable, thereby the mechanical strength of hold-down arm, carrying cable, arm is had relatively high expectations, even also needs additional weight equalizer.

Summary of the invention

The utility model mainly is to salvage the rubbish foreign material from the sludge pan that is lower than tower crane at the problems referred to above and purposes of the present utility model, working space is lower, thereby developed a kind of electronic light tower hoist of brachium 8～12m, have simple, practical, cost is low, operating cost is cheap, characteristics such as pollution-free.

Above-mentioned purpose of the present utility model is realized by following technical scheme: a kind of electronic light tower hoist, contain pedestal, arm, pulley, bearing and power pack section, it is characterized in that being provided with a king-post, its root and ground are fixed, one fixedly large fluted disc and load-bearing bearing that is sleeved on the king-post is set in king-post bottom, outer the putting that connects firmly with the load-bearing outer race is fixedly connected with frame, the arm winch has been set on the frame, crane winch and control desk, the miniature gears that turns to of steer motor-change-speed box driving also is installed on the frame, turn to the engagement of miniature gears and large fluted disc, the tail end of arm is hinged on the outer of load-bearing bearing and puts, the head end of arm is provided with gin wheel, be provided with the arm pulley between the tail end of arm and the head end, suit holds suspension bearing at the king-post top, with hold that the suspension bearing outer shroud connects firmly outer put to connect firmly assembly pulley and put outward be provided with earrings and be connected spindle arm, spindle arm end in addition connects deflection sheave, the wirerope of crane winch is worn behind the gin wheel of the pulley that connects the king-post top and arm head end to grab bucket, and the wirerope that plays the arm winch is worn and played arm pulley and the spindle arm deflection sheave of end in addition between the pulley that connects the king-post top and arm tail end and the head end.The load-bearing bearing can adopt tapered roller bearing, holds suspension bearing and can adopt deep groove ball bearing.

Advantage of the present utility model and effect:

A) firm.Crash-resistant heavy caliber, thick-walled seamless steel pipes king-post directly are cast in the reinforced concrete plinth, form big moment axle center, and hoisting moment directly acts on king-post; The load-bearing bearing arrangement is positioned at the king-post base portion, and the center of gravity of whole tower crane rotating element is lower, has increased stability.

B) light and handy, low energy consumption.Account for the king-post of whole tower crane quality more than 60% and turn to large fluted disc to remain static, need not power consumption, steer motor power has only 1kW; The radius of gyration of lifting arm reaches 5m, just can easily control arm with 500kg electric winch and two single-sheaved blocks; On the lifting wirerope, use movable pulley, just can provide the 1000kg load-carrying ability with the 500kg electric winch; Total installed capacity power 7kW, real-world operation power has only 3kW.

C) sturdy and durable.Except electrical machinery and pulley need the periodical maintenance, the maintenance of the nothing of tower crane base portion is estimated can reach about 20 years service life.The load of two bearings is less than 1% of its rated load, and almost is under the hermetically sealed protection, can use for a long time.

D) simple, practical.Tower crane is by the simple appliances mechanical composition, and the rural migrant worker with high chinesization just can grasp working service technical ability through training in 1 month.In general stream pollution dominant project, use, only needed for to operate 1 personal sector's time.

E) cost and operating cost are cheap.Whole tower crane is by simple electrical equipment, mechanical composition, cost 6～80,000 yuan, and annual operating and maintenance cost is no more than 10,000 yuan (use, contain the electricity charge) in general stream pollution dominant project.This tower crane is installed on semicircle desilting-conservancy trash pool of radius 11m, is used to salvage mud and rubbish foreign material in the pond after the configure dedicated grab bucket, and with its entrucking outward transport, only need move about 20 minutes the about 1kWH of consumption of current every day.

F) increase the service life.Except that electrical equipment, gearing, the maintenance of the nothing of base portion reaches more than 10 years service life.All electrical equipment, mechanical equipment all have the protection of anti-break iron case, and only need maintaining once every year, mainly be oil antirust.

G) king-post that is cast in the tower crane pedestal with base portion is born gravitational moment, and hoisting moment can reach more than the 100KNM; Miscellaneous part rotates in company with the load-bearing bearing of king-post base portion and the suspension bearing that holds at king-post top, and two shaft strengths only have 1% of its rated load, and are not easy to wear, and reduced the rotation energy consumption.

H) according to the real needs characteristics of stream pollution dominant project, the main rubbish foreign material of from the sludge pan that is lower than tower crane, salvaging, working space is lower, thereby takes low level diagonal brace arm, the center of gravity of tower crane rotating element is reduced near ground, has improved safety and steadiness; The king-post height that draws arm reaches 5m, is about 1/2 of length of boom, compare rationally on the mechanics, thereby lower to the wirerope mechanical strength requirement of arm and traction arm, also less to the tractive force requirement of lifting arm, thereby reduced tower crane deadweight and energy consumption.

Description of drawings

Fig. 1 is the electronic light tower hoist overall construction drawing of the utility model;

Fig. 2 is the load-bearing bearing of the electronic light tower hoist of the utility model and holds the suspension bearing constructional drawing.

The specific embodiment

Referring to Fig. 1,2, the utility model is an all-electric long-armed tower crane of three-dimensional, mainly by king-post, load-bearing bearing structure, hold suspension bearing mechanism, arm, electrical machinery mechanism and partly form.King-post 10 is φ 275mm, wall thickness 25mm, and the solid drawn pipe of length 6.5m, lower end 1.3m are cast in the reinforced concrete plinth 1, forms the firm axle center of tower crane.The load-bearing bearing structure is sleeved on the king-post base portion, comprises tapered roller bearing 22 (model 351068), bearing support 21, bearing pressure ring 23 and the overcoat 11 of φ 520mm, height 180mm, load-bearing bearing protective case 27.Hold suspension bearing mechanism and be installed in king-post 10 tops, comprise deep groove ball bearing 30, bearing cap shim 31, bearing nut 32, the overcoat 15 of the external φ 200mm height of spindle nose 29, a 38mm and install on the coat assembly pulley 16 with support earrings 28 by spindle arm and be connected spindle arm 17, spindle arm 17 is end connection spindle arm head sheave 18 in addition.Spindle nose 29 is fixed on king-post 10 center of top, supports the whole suspension bearing mechanism of holding, and it can be rotated with the load-bearing bearing, becomes the stressed strong point of lifting arm and lifting weight.Arm 12 serves as to support to be welded based on four solid drawn pipes, steel plate, fixes in the arm carrying support 24 on the lower end bipod insertion load-bearing bearing outside 11 and with pin 25 pin sleeve pipes, and arm 12 and electrical machinery mechanism can freely rotate around king-post 10.Middle arm pulley 13 provides stress point for playing an arm wirerope 19, and top gin wheel 14 provides support a little for lifting wirerope 20.Length of boom 8～12m, operating angle is spent to 70 degree from level 0, plays heavy lift 1000kg.Electrical machinery mechanism is made up of frame 5, steering hardware 2,6, an arm winch 7, crane winch 8, control desk 9 five parts, is installed on the load-bearing bearing outside 11.Frame 5 is formed by channel-section steel and welded steel plate, to be bolted on the load-bearing bearing outside 11, becomes the basis that electrical machinery is installed.Steering hardware is made up of turn to large fluted disc 2 (being fixed in the ground by large fluted disc pull bar 3 and chassis 4) and the steer motor-change-speed box 6 that is installed under the frame that are installed on the tower crane, and power of motor 1kW drives tower crane and rotates around king-post 10 centers.Play arm winch 7 and crane winch 8 and be the 500kg electric winch, power of motor 3kW is respectively the lifting arm and the lifting weight provides power.The two-direction switch that 3 motors of control are arranged on the control desk 9, and be grab bucket power reservation power interface.

The utility model is by two electric winches difference lifting arms and lifting weight, this and the few of difference of common tower crane.Special character is its horizontal steering swivel system: the steer motor-change-speed box miniature gears that is installed in the frame below meshes with the large fluted disc that turns to that is fixed on the tower crane pedestal, when starting steer motor, drive chassis, load-bearing bearing arrangement and arm are done to rotate synchronously around king-post; Wirerope by the lifting arm when arm rotates is sent to the spindle arm head sheave with moment of torsion, orders about by spindle arm and holds the rotation of suspension bearing system, makes the assembly pulley that holds the suspension bearing system keep direction consistent with wirerope, can normal operation.Because the hold-down arm (king-post) of traction arm is long, and it is bigger to bear moment, arm not only can be spent normal operation to the updip 70 degree scopes in level 0, and the 30 degree work that can have a down dip in case of necessity.

The utility model prototype is built up in Dengjiang County, Yunnan Province Fuxian Lake horse material river pollution control wetland engineering district in October, 2003, main technical details is as follows: king-post height 5.5m, swinging radius 10m, rated load 1000kg, total installed capacity power 7kW, running power 3kW, working power 380V/50HZ, speed of revolutions 1.2R/Min, hoisting speed 30m/Min, moving part quality 1240kg.This tower crane is installed on semicircle desilting-conservancy trash pool of radius 11m, is used to salvage mud and rubbish foreign material in the pond after the configure dedicated grab bucket, and with its entrucking outward transport, only need move about 20 minutes the about 1kWH of consumption of current every day.Dengjiang County, the Yunnan Province Fuxian Lake puddling ditch of extending transformation pollutes control wetland engineering this tower crane will be installed, and Eryuan County, Yunnan Province Sewage Plant wet land system under preparation also will be installed this tower crane.

Claims (2)

1, a kind of electronic light tower hoist, contain pedestal, arm, pulley, bearing and power pack section, it is characterized in that being provided with a king-post, its root and ground are fixed, one fixedly large fluted disc and load-bearing bearing that is sleeved on the king-post is set in king-post bottom, outer the putting that connects firmly with the load-bearing outer race is fixedly connected with frame, the arm winch has been set on the frame, crane winch and control desk, the miniature gears that turns to of steer motor-change-speed box driving also is installed on the frame, turn to the engagement of miniature gears and large fluted disc, the tail end of arm is hinged on the outer of load-bearing bearing and puts, the head end of arm is provided with gin wheel, be provided with the arm pulley between the tail end of arm and the head end, suit holds suspension bearing at the king-post top, with hold that the suspension bearing outer shroud connects firmly outer put to connect firmly assembly pulley and put outward be provided with earrings and be connected spindle arm, spindle arm end in addition connects deflection sheave, the wirerope of crane winch is worn behind the gin wheel of the pulley that connects the king-post top and arm head end to grab bucket, and the wirerope that plays the arm winch is worn and played arm pulley and the spindle arm deflection sheave of end in addition between the pulley that connects the king-post top and arm tail end and the head end.

2, according to the described a kind of electronic light tower hoist of claim 1, it is characterized in that the load-bearing bearing adopts tapered roller bearing, hold suspension bearing and adopt deep groove ball bearing.