M619A Mast Section For Tower Crane Masts

Products Specification

Type , Model: M619A Mast Section For Tower Crane Masts

Size: 2mx2mx5m  (2.13x2.13x5.32m)

Materials: Q345B

Within: Pins, bolts, Ladder, Platform

Process: Blasting derusting, 

Painting:  Under painting , Middle painting, Surface painting.

Our factory produce and supply almost all famous brand tower crane :Mast section, Anchor Frame, Fixing angle ,Adaptor and so on as good quality and price.

MC465 mast section ,  MC310 K12 mast section, MC310 K16 mast section,  MCT385 L14 mast section,   MCR 225A mast section,  MCR295 H16 mast section, MCR295 H20 mast section ,MCR295 H25 mast section

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M619A Mast Section For Tower Crane Masts

Tower Crane Knowledge sharing：

The characteristics of the inner climbing tower crane model, and what are its advantages?
After many years of development, tower cranes have been derived from a large number of varieties. According to the design form, they can be divided into self-ascending tower cranes, inner climbing tower cranes, flat head towers, movable arm towers, and fast mounted towers.

M619A Mast Section For Tower Crane Masts

Hang and so on. Among them, the inner climbing tower is often used in high-rise building construction.
In general, the interior climbing tower crane has the advantages of large effective construction capacity, low manufacturing costs, low operating costs, and a small area of material storage for the safety Gaohe crane assembly.

In the current Chinese standard classification, the tower crane model The standard is QT, The "Q" represents the "crane" and the "T" represents the "tower".

Since the inner climbing tower crane mechanism is on the upper part, it is on the number. This type of tower crane is also classified as "QTZ"-that is, it is classified as "up and rising" tower.

M619A Mast Section For Tower Crane Masts

 Unlike common attached tower cranes, interior climbing tower cranes are installed inside the building(special openings such as elevator shafts or stairwells).

The construction surface is full circle. This is particularly important in the construction of cities with high building density. Because the horizontal tower lifts its heavy arm across the block, it is easy to collide with buildings, wires, water pipes, etc., causing accidents and causing danger.
In addition,  some of the manufacturers produced such models are also independently classified as one type, in the code The prefix "QTP" is given. The digital code of the inner climbing tower crane is still the same as that of other models.

 For example, QTP40(4908) indicates that "the nominal gravity moment is 400KN · M, the arm is 49 meters long, and the lifting arm is 49 meters high(the end lifting) is a climbing tower crane with a weight of 0,8T", of which, 40 refers to 40 torque units, 1 unit corresponds to 10KN · M, 49 in parentheses is arm length, and "08" refers to 0.8 tons

Analysis of the structure of the hydraulic system of the tower crane and the steps of the hydraulic overhead connection

M619A Mast Section For Tower Crane Masts

Tower crane, it with towering posture, pulling out thousands of tons of goods for construction, transportation and transportation. However, how can the tower crane "carry" these heavy things up to a height? It also starts with the tower hoist hydraulic system.
As we all know, tower hoists are divided into the following major components-metal components, such as lifting arms, tower bodies, turntables, supports, balance arms, bottom frames, spires, etc.

Parts and components, such as wire rope, variable amplitude car, pulley, rotary support, hook and brake; Working organization, such as lifting mechanism, changing amplitude mechanism, car traction mechanism, rotary mechanism and large car walking mechanism(walking tower crane)

Safety devices, such as limit switches, overload insurers, Buffer stop devices, wire rope detaching devices, anemometers, emergency safety switches, and safety protection sound signaling machines, etc., are the hydraulic systems of Tower cranes.
The main components of the tower crane hydraulic system are hydraulic pumps, hydraulic cylinders, control elements, tubing and pipe joints, fuel tanks and hydraulic oil filters.
Among them, the tower suspension hydraulic pump and hydraulic motor are the most complex parts of the hydraulic system.

The hydraulic pump inhales the oil and transmits it through the pipeline to the hydraulic cylinder or hydraulic motor, and the hydraulic cylinder is the hydraulic system's execution element.

M619A Mast Section For Tower Crane Masts

Hydraulic pump can be seen as hydraulic and heart, hydraulic energy source. The hydraulic pumps used in the Chinese tower lifting hydraulic overhead system are mostly CB-G gear pumps, CB does not have the code name of gear, and Hegelong G is a fixed axial gap with a working pressure of 12. 5 ~ 16 MPa.
The entire process of a hydraulic top elevation can be divided into 7 major steps. They are
1. The balance of movement is heavy, so that the tower body is not subject to unbalanced moments, the lifting arm is in place, the orientation is the same as the introduction orbit and locked, and a standard section of the tower body is placed on the ferry car;
2. Peak;
3. The positioning pin is in place and locked, the piston rod is lifted, and the introduction space is formed in the sleeve;
4. Introduction of standard sections;
5. Raise the standard festival and launch the ferry car;
6. Place the standard section in place and install connection bolts;
7. Slightly rise upwards, pull out the positioning lock to make the transition section and the tower tower that has been attached to the tower are integrated.

MC465 mast section ,  MC310 K12 mast section, MC310 K16 mast section,  MCT385 L14 mast section,   MCR 225A mast section,  MCR295 H16 mast section, MCR295 H20 mast section ,MCR295 H25 mast section