Home  >  Construction Machinery  >  Engineering & Construction Machinery  >  Cranes  >  Tower Cranes

QTZ series tower crane is a kind of upper-slewing fixed type tower crane. - details see: https://www.machineto.com/new-ce-certificate-4ton-tower-crane-qtz40-4808-10103283

New CE Certificate 4ton tower crane QTZ40-4808

QTZ series tower crane is a kind of upper-slewing fixed type tower crane. It can be used into every kind of industrial and civil construction, especially suitable for the construction site which is narrow and landform is complicated.
Tower crane has hoisting, slewing and trolleying mechanisms. They can work respectively or together to raise working efficiency. Hoisting mechanism adopts double-speed electromotor, it has two kinds of work speed: Lifting and slowly in position, so as to satisfy different work requirement. Jib can rotate 360° Freely. Level arm frame, trolley range-changing, agile and reliable, lifting in position is accurate. It can satisfy vertical and level transport demand of construction at a time.
Safety devices of this tower crane are reliable, it is equipped with reliable mechanical type moment limiter and lifting weight limiter, it also has lifting height, work range and slewing limiters, so as to ensure the work safety. This tower crane is designed reasonably, quality is high, structure is compact, and operation is convenient; It is an ideal liftingmachine of construction team.

Detailed Specification:

1. Version: Stationary on fixing angles type

2. Jib Length: 48M

3. Max. Load: 4Ton( 4-fall operation )

4. Tip Load: 0.8Ton( 2-fall operation )

5. Hook Height: ( Free Standing Height 29M)

6. Section Size: 1.6*1.6*2.2m Q235B

7. Section Quantity: 11 units

8. Power Supply: 380V50Hz/440V50Hz;

9.. Structure: 1 set of fixing angels; 11units mast sections; slewing mast; slewing turntable and cabin with air condition; counter-jib; 48m jib; 29m electrical cables; set of anchorage frame; with full set accessories and safety protection device, Schneider Inverter, PLC, electrical components and plug connection.

10. Safety Device: 1) Hoist height limit 2) Trolley distance limit 3) Over speed limit

4) Over load limit5)Trolley moment limit 6) Slewing angle limit 7) Emergency stop button

8) Obstruction light (tip of jib, tower head and counter-jib) 9) Wind lock device

QTZ40-4808 Overall Layout:
The under-frame of whole machine is tightly fixed on special concrete foundation. Its upper part is connected with tower body; The upper end of tower body is connected with jack-up set frame and lower turn-table, and the surface of lower turn-table is connected with the outer ring of slewing bearing. The rotating part fixed on the inner ring of slewing bearing includes rotary upper turn-table, tower cap, balance arm, crane boom, trolley and hooks, counterweight, hoisting mechanism, slewing mechanism, and cab. These components can all rotate fully to 540°around tower body axis line in their respective horizontal plane.
The crane boom is connected with tower cap by two boom pull rods and its root is connected with upper turn-table pin. The balance arm is connected tower cap by two boom pull rods and its root is connected with upper turn-table pin. The hoisting mechanism is set at the rear of balance arm. The slewing mechanism lies on the right of rotary upper turn-table and cab on the left. The trolley and hooks are drawn by luffing mechanism close to the root of boom root, in vertical reciprocating motion along with longitudinal axis of crane boom.
The height of tower body consists of heights of under-frame, standard joints, lower turn-table and upper turn-table. Unattached height is composed of 11 standard joints. When the maximum lifting height is 120 m, it is composed of 47 standard joints as well as 5 attachment devices. Attached pre-burial device should be buried into the attached height position planned beforehand so as to attach tower body to buildings by attached struts.
There are four dismountable ear plates above the standard joints of tower body in diagonal direction. The upper parts of four slant beams are connected to ear plates and under-frame ear bases by pins. The lift mechanism consists of two parts: Jack-up set frame and hydraulic jack-up devices. The jack-up set frame is framework spatial steel components, connected with lower turn-table by screws. At the back of it there are jack-up cylinders and beams of hydraulic jack-up system installed. The hydraulic pumping station lies on the set frame working platform. While jacking up, the jack-up beams act against footsteps. With the function of cylinder, set frames together with parts above the lower turn-table elevate along axis lines of tower body. Whenever the cylinder jacks up twice, one standard joint is introduced.
When the lifting height is no more than 29 meters, adopt the independent style; When it is more than 29 meters, adopt the attached style. While attaching, under no circumstances should the length upper cantilever parts exceed 25 meters.