An engineering machinery and its reel pipe device

Abstract

The invention discloses a kind of reel pipe device for construction machinery, including the support, the main shaft tube running through the support and connecting the support through bearings, and at least two rotary seals between the support and the main shaft tube which are located in the sealing grooves. There is a high-pressure sealing chamber between the described rotary seals, support, andmain shaft tube. The described reel pipe device further includes the sealing support installed outside the main shaft tube, the removable sealing support may be installed outside the support and thesealing groove is formed between the sealing support and the support. The invention also discloses a kind of construction machinery including the above reel pipe device, especially the hydraulic diaphragm wall grab machine. The described structural design of reel pipe device can reduce the processing difficulty of the sealing groove, and the installation or replacement difficulty of rotary seals,and improve the installation quality of rotary seals in order to ensure the reliability of sealing.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a pipe coiling device for construction machinery. The invention also relates to a construction machine comprising the pipe rolling device. Background technique [0002] Hose reels are commonly used in construction machinery, such as hydraulic diaphragm wall grabs. The coiling device of the hydraulic continuous wall grab machine can transmit the hydraulic power of the main engine to the hydraulic grab cylinder and the deviation correction cylinder. During the construction process of the hydraulic diaphragm wall grab machine, the hydraulic grab bucket can usually go deep into the ground more than 50 meters. Correspondingly, the hose coiling device should simultaneously take up and put down the hydraulic hose as the hydraulic grab bucket rises and falls. The support of the hose reel device is actually a combination of a rotary joint and a support connection. One of its functi...

AI Technical Summary

Problems solved by technology

[0006] such as As shown in Figure 2 and Figure 3, The sealing groove 13 is opened on the inner wall of the support 11 and is a closed sealing groove, so it is difficult to process, and the processing quality of the surface of the sealing groove 13 is not easy to guarantee

When installing or replacing the rotary seal 14, since the inner ring material of the rotary seal 14 is relatively hard, it must be preheated and bent before being installed or replaced in the sealing groove 13, which will cause unnecessary damage to the rotary seal 14 , and the installation quality of the rotary seal 14 cannot be guaranteed

[0007] such as As shown in Figure 1, the bearing 15 is located outside the high-pressure sealed chamber 16, so it is necessary to install a separate lubrication mechanism on the support to lubricate it, which increases the complexity of the support structure and also increases the processing cost

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