Muddy water bypass device for miniature pipe jacking machine

Abstract

The invention relates to the technical field of construction equipment, in particular to a muddy water bypass device for a miniature pipe jacking machine. A water inlet pipeline and a water outlet pipeline are arranged on the lower side of a muddy water bin of the pipe jacking machine, a first four-way valve is arranged in the water inlet pipeline, a second four-way valve is arranged in the wateroutlet pipeline, wherein the first four-way valve is provided with a first water inlet, a first water outlet, a pressurizing opening and a first connecting opening, the pressurizing opening communicates to the muddy water bin of the pipe jacking machine through a pressurizing pipeline, a pressurizing valve is arranged at the pressurizing pipeline, and the second four-way valve is provided with a second water inlet A, a second water inlet B, a second water outlet and a second connecting opening. According to the muddy water bypass device, the structure size of the device can be reduced, and thein-machine space is saved; the universality and adaptability of the device are improved, the use is reliable, the manual labor amount is reduced, the occupational hazards are reduced, the structure is simple, a four-way ball valve is adopted for replacement to complete switching of three loops of a mud feeding and discharging mode, a bypass mode and a flushing mode, and the structural size of thedevice is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of construction equipment, in particular to a muddy water bypass device for a miniature pipe jacking machine. Background technique [0002] The internal bypass device of muddy water pipe jacking is composed of valves and pipes, which is placed inside the pipe jacking machine, connected to the muddy water tank of the pipe jacking machine in front, and muddy water distribution device connected to the mud discharge pipeline in the rear. It has the function of circulating muddy water and bypassing it. During normal excavation work, it plays a transitional role in the mud inlet and discharge cycle. Under the bypass cycle state, the mud discharge pipeline can be flushed to avoid pipeline blockage. Therefore, the bypass device in the machine plays a very important role in pipe jacking construction. . [0003] The water stop device of the traditional pipe jacking machine is mainly composed of a water inlet valve, ...

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Problems solved by technology

[0003] The water stop device of the traditional pipe jacking machine is mainly composed of a water inlet valve, a drain valve and a bypass valve. The mud inlet and discharge valve and the bypass valve each require an actuator. The installation size of the whole bypass device is too large and the structure is complicated. In the micro pipe jacking machine, due to the limited space inside the machine, the huge size of the traditional bypass device is not suitable, and the complex execution structure reduces the reliability of the device, and the diameter of the water inlet valve, pipeline and mud discharge valve pipeline are the same, The water inlet pressure is affected by the resistance loss along the process and local pressure loss. When the pipeline flows to the mud tank, the pressure loss is too large, and the ability to wash the mud and cuttings on the face of the cutter head and the mud tank is weak, especially in the The hard clay layer is very prone to the phenomenon of "sticky cutterhead", which greatly affects the efficiency of tunneling construction

[0004] At present, a special valve body is also used to integrate the water inlet valve and the mud discharge valve into a whole to reduce the structural size, but the special valve body has a complicated manufacturing process and cannot be disassembled. Once the inside of the valve body is blocked, it is difficult to clean and the special valve body is non-standard. Parts, damaged parts can only be replaced as a whole, which reduces the circulation and adaptability of the product, and does not conform to the sustainable development concept of green environmental protection

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