QTZ315 tower crane is a reinforced tower crane designed to meet GB/T5031<< >> and GB5144<< >> and other standards of tower crane safety regulations, rated lifting moment 315t·m, the maximum lifting weight is 16 tons, TC7020, TC6524, TC6028, TC5236 and other types. The machine hoisting mechanism, slewing mechanism, luffing mechanism for variable frequency speed regulation agencies, electric control system adopts imported components, security protection device for mechanical or electromechanical integration products, complete and reliable, the machine has a fixed, walk, adhesion, climbing and so on work type, can meet the city the high-level construction, industrial plant, power station dam, Bridges and other construction needs.

QTZ315 technical parameters

[lifting mechanism] :

The lifting mechanism (2200Kg) adopts yzp280m-6-65kw variable frequency motor, which drives the reduction box through the toothed coupling and then drives the drum. Speed is achieved by frequency setting of frequency converter. From 0 to each gear is stepless speed regulation, smooth start braking, small impact. When using 2 ropes, the speed can reach 0~102m/min and 0~51m/min; when using 4 ropes, the speed can reach 0~51m/min and 0~25.5m/min.

A normally closed hydraulic push rod brake (ywz3h315/90)(850-900nm) is installed at the input shaft end of the reduction gear box (see figure 4-13). There is a height limiter on one side of the drum, which can be adjusted according to the required height. Reliable control, simple operation, easy maintenance.

The rotary mechanism is a transmission device that provides power for the upper part of the tower crane. The device is composed of a motor, a planetary reducer, a pinion and a rotary limiter. This tower machine adopts two sets of such devices, which are symmetrically distributed on both sides of the slewing bearing and mounted on the upper bearing. The pinion gear meshes with the large tooth ring of the slewing bearing and the mechanism is driven by the torque motor with brake.
The motor tail is provided with a normally closed disc brake; Can be used for tower crane jacking and fixed point operation of the boom brake positioning. The slewing limiter is used to control the tower crane to turn only 540° in one direction to avoid twisting the cable.

[luffing mechanism] :

The amplitude transformer (470Kg) adopts torque motor ylef112l-95nm, drives the drum through the planetary reducer, and enables the truck to achieve 0-80m/min speed through the wire rope, and runs at high speed back and forth on the derrick. Motor tail with a disc brake, when the car motor power delay brake. The amplitude limiter is used to prevent misoperation and stop the car before it hits the buffer at the base of the boom.

[lifting boom] : the lifting boom is divided into 11 sections. The upper chord of the third, seventh and eighth sections of the boom is provided with a lifting point of a tie rod. The first arm is equipped with a trolley traction mechanism, and the arm end is equipped with a wire rope anti-twisting device. The maximum arm length is 70 meters, and can be assembled into 65 meters, 60 meters, 52.5 meters, 45 meters and other 5 kinds of arm length, to meet the needs of different rotating space. A trolley luffing mechanism is installed in the root section of the boom and a platform frame is provided to facilitate installation and maintenance.

【 balance arm 】: the balance arm is divided into three sections, two sections of 7.5 meters, a section of 4 meters, connected by a pin shaft. With the help of the pin shaft, the balance arm and the balance arm tie rod are connected with the rotary tower body and the top of the tower into a whole

[rotary limiter] :

"The tower"

The top of the tower is an oblique cone, the upper end is connected to the boom arm and the balance arm by a pull rod to keep the two arms horizontal, and the lower end is connected by four pin shafts

The rotating tower body is connected. In order to install the heavy arm pull rod and the balance arm pull rod, the upper part of the tower top is provided with a working platform and pulley block.

The cab is the workshop where the driver operates the tower crane, which is fixed on the right side of the rotary tower. Each indicator light and handle of the linkage control console are located on both sides of the driver's cab seat, which is easy to operate and has a broad field of vision.

The bridge electric cabinet is arranged in the rear of the bridge, main circuit breaker, lighting and auxiliary circuit breaker and other devices.

[electronic control system and safety device] :

QTZ315 electronic control system adopts the control mode of PLC+ frequency converter, which is more advanced nowadays, making the system reliable.

Maneuverability, stability and machine efficiency have been greatly improved. As a result of the use of frequency converter to achieve the mechanism

Stepless speed regulation, so that the stability of the whole equipment has a relatively high promotion. The electronic control system adopts global procurement of electronic control components, the PLC is OMRON of Japan, the frequency converter is yaskawa of Japan, and the whole set of low voltage is schneider. It is because of this that the failure rate of the electronic control system is greatly reduced, and it also provides convenience for fault determination, location and troubleshooting. In addition, it also includes electrical safety devices such as anemometer, obstacle light, and mechanical safety devices such as trolley shaft breaking protection and traction rope breaking rope preventing slipping.