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Rectangular pipe jacking machine excavation face blind area crushing device and method

A technology of a crushing device and a crushing method, which is applied in the direction of earthwork drilling, mining equipment, tunnels, etc., can solve the problems of increasing jacking resistance and the inability to cut pipes in jacking, so as to improve cutting efficiency, and the combined structure is simple and feasible, which is conducive to smooth operation. The effect of exclusion

Pending Publication Date: 2018-07-10
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most rectangular pipe jacking constructions use rectangular pipe jacking machines. No matter how the diameters of the cutterheads are allocated for this type of pipe jacking, there will always be areas where the pipe jacking cannot be cut.
In these areas, the special structures such as the wedge-shaped body on the end face can only be used to forcibly break the soil or press it into the cutting area of ​​the cutterhead for cutting, which greatly increases the jacking resistance, especially in soft rock formations and Reinforced area

Method used

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  • Rectangular pipe jacking machine excavation face blind area crushing device and method
  • Rectangular pipe jacking machine excavation face blind area crushing device and method
  • Rectangular pipe jacking machine excavation face blind area crushing device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Installation of the crushing device in the blind area of ​​the excavation face of the rectangular pipe jacking machine.

[0026] 1. See figure 1 , according to the size of the blind area, select a certain size of the cylinder, and weld the cross-cone soil breaking device and the front end of the piston rod of the cylinder together, and the stroke of the cylinder maintains zero displacement. One to two cutting devices are recommended for each blind zone;

[0027] 2. According to the size of the oil cylinder, process and assemble the high-pressure water jet device that matches it;

[0028] 3. Cut out round holes suitable for cylinders, bolts and high-pressure water channels in the blind area of ​​the excavation panel of the rectangular pipe jacking machine;

[0029] 4. Install the oil cylinder and the cross-cone soil breaking device on the panel of the pipe jacking machine and fix them with bolts. It should be noted that the high-pressure water channel is...

example 2

[0031] Example 2: The method of using the crushing device in the blind area of ​​the excavation face of the rectangular pipe jacking machine.

[0032] 1. When drilling into soft rock or reinforced area and finding that the jacking force is too large, open the oil cylinder in time, refuel from the oil inlet, and at the same time use high-pressure jet device to inject water into the high-pressure water channel;

[0033] 2. Stop refueling when the oil cylinder reaches its full stroke, and keep injecting high-pressure water continuously;

[0034] 3. When the jacking force decreases and remains relatively stable, the oil cylinder can be recovered and the injection of high-pressure water will be stopped at the same time;

[0035] 4. When the jacking force does not decrease or the decrease is not obvious, keep injecting high-pressure water, retract the oil cylinder to the initial position of the oil cylinder, it is recommended not to reach the zero stroke, then refuel at the oil inle...

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Abstract

The invention relates to the technical field of non-excavation engineering equipment, in particular to a rectangular pipe jacking machine excavation face blind area crushing device and method. The crushing device is internally provided with a driving mechanism, and the output end of the driving mechanism is connected with a crossed conical groundbreaking device. A plurality of axial high-pressurenozzles and a plurality of radial high-pressure nozzles are arranged on the crossed conical groundbreaking device in a surrounding mode. The axial high-pressure nozzles and the radial high-pressure nozzles are connected with a high-pressure water source. According to the rectangular pipe jacking machine excavation face blind area crushing device and method, compared with the prior art, the composite structure is simple and feasible, mounting and dismounting are easy, and the rectangular pipe jacking machine excavation face blind area crushing device and method have the advantages that large jacking force can be provided, the groundbreaking device is in a crossed cone shape, the very large pressure intensity can be generated, and thus the groundbreaking efficiency is greatly improved; and high-pressure water spraying heads in different flow jetting directions are additionally arranged on the periphery, the crushing device participates in breaking and cutting work of soft rock and reinforced area soil mass while the crushing device serves as a cleaning and cooling device, the cutting efficiency is improved, the broken soil mass can further be softened, and the soil mass is smoothly removed advantageously.

Description

technical field [0001] The invention relates to the technical field of non-excavation engineering equipment and methods, in particular to a blind area crushing device and method for the excavation face of a rectangular pipe jacking machine. Background technique [0002] At present, most rectangular pipe jacking constructions use rectangular pipe jacking machines. No matter how the diameters of the cutterheads are allocated for this type of pipe jacking, there will always be areas where the pipe jacking cannot be cut. In these areas, the special structures such as the wedge-shaped body on the end face can only be used to forcibly break the soil or press it into the cutting area of ​​the cutterhead for cutting, which greatly increases the jacking resistance, especially in soft rock formations and reinforced area. [0003] Therefore, it is necessary to design a new type of blind area crushing device and method for the excavation face of a rectangular pipe jacking machine. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10
CPCE21D9/1066
Inventor 戢鸿鑫项侨刘习生陈伟平钱琨
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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