Rock breaking tunneling machine using liquid nitrogen and jet of ice particles

A roadheader and liquid nitrogen technology, applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problem of abnormal wear and replacement frequency of disc hobs

Active Publication Date: 2019-07-05
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a roadheader that uses liquid nitrogen and ice particle jets to break rocks, which solves the technical problems of abnormal wear and high replacement frequency of disc-shaped hobs in existing roadheaders

Method used

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  • Rock breaking tunneling machine using liquid nitrogen and jet of ice particles
  • Rock breaking tunneling machine using liquid nitrogen and jet of ice particles
  • Rock breaking tunneling machine using liquid nitrogen and jet of ice particles

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Embodiment 1, a kind of tunneling machine utilizing liquid nitrogen and ice particle jet to break rock, such as figure 1 and figure 2 As shown, a cutter head system 1 is included, and a liquid nitrogen ejection nozzle 2 is arranged on the cutter head system 1 , and the liquid nitrogen ejection nozzle 2 is connected to a liquid nitrogen generator 3 through a high-pressure pipeline 5 . The liquid nitrogen generating device 3 can generate liquid nitrogen, and the liquid nitrogen generating device 3 can transport the generated liquid nitrogen to the liquid nitrogen emission nozzle 2 through the high-pressure pipeline 5, and the liquid nitrogen emission nozzle 2 can eject the liquid nitrogen at a super high speed, A jet beam with highly concentrated energy is formed. This jet beam has the impact of water jet, freezing force destruction function and thermal destruction function, and can break rocks to realize tunneling.

[0017] An ice particle production device is arranged...

Embodiment 2

[0020] Embodiment 2, a roadheader using liquid nitrogen and ice particle jet to break rock, the liquid nitrogen injection nozzle 2, high-pressure pump station 4, negative pressure device and ice particle production device are all connected to the control system. The control system can remotely adjust the output pressure of the high-pressure pump station 4, control the opening and closing of the liquid nitrogen injection nozzle 2, control the production and transportation of ice particles, and then can conveniently adjust the volume of liquid nitrogen injected by the liquid nitrogen injection nozzle 2 according to different geology. pressure.

[0021] Other structures of this embodiment may be the same as Embodiment 1.

Embodiment 3

[0022] Embodiment 3, a roadheader that uses liquid nitrogen and ice particle jets to break rocks. A pressure gauge is provided on the high-pressure pipeline 5 between the high-pressure pump station 4 and the liquid nitrogen injection nozzle 2, which can be monitored in real time according to the pressure gauge. The pressure of the ejected liquid nitrogen can be adjusted in real time through the high-pressure pump station 4 .

[0023] Other structures of this embodiment may be the same as those of Embodiment 1 or 2.

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PUM

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Abstract

The invention discloses a rock breaking tunneling machine using liquid nitrogen and jet of ice particles.The technical problems of abnormal wear and high replacement frequency ofa disc cutter of an existing tunneling machine are solved. The rock breaking tunneling machine using liquid nitrogen and jet of ice particles comprises a cutterhead system, the cutter head system is provided with a liquidnitrogen emission nozzle, the liquid nitrogen emission nozzle is connected with a liquid nitrogen generating device through a high pressure pipeline, the liquid nitrogen emission nozzle and the liquidnitrogen generating device are connected through a high pressure pumping station,an ice particle production device is arranged adjacent to the liquid nitrogen emission nozzle, and the ice particle production device is coupled to the liquid nitrogen emission nozzle through a negative pressure device. According to the rock breaking tunneling machine using liquid nitrogen and jet of ice particles,the rock breaking efficiency is high,the cost is low, and the rock breaking medium is environment-friendly.

Description

technical field [0001] The invention relates to the technical field of roadheaders, in particular to a roadheader which utilizes liquid nitrogen and ice particle jets to break rocks. Background technique [0002] At present, tunneling is aimed at the rock formation, mainly relying on the disc-shaped hob to squeeze the rock to break the rock mass. It mainly overcomes the compressive strength of the rock, and its rock-breaking efficiency is aimed at the rock formation with general strength (within 100MPA). It is acceptable, but when the roadheader encounters boulders and hard rocks during the excavation process, the efficiency of the hob to squeeze and break the rock will decrease, and the abnormal wear and replacement frequency of the hob will increase, resulting in a decrease in the efficiency of shield tunneling , The cost of excavation increases. At the same time, when excavating seriously uneven geological conditions such as soft top and bottom hard, uneven soft and hard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10
CPCE21D9/1066
Inventor 朱英贾连辉叶蕾
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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