Hob-free hard rock tunneling machine for breaking rocks by utilizing microwaves and liquid nitrogen jet flow

A hard rock roadheader and microwave radiation technology, which is applied in mining equipment, earthwork drilling, tunnels, etc., can solve the problems of high cost and long construction period, and achieve the effects of light weight, reduced excavation cost, and improved excavation efficiency

Active Publication Date: 2021-01-08
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a hobless hard rock tunneling machine that uses microwaves and liquid nitrogen jets to break rocks, which solves the need for cutter replacement and other maintenance when using hob cutterheads to dig into hard rock. The technical problems caused by high cost and long construction period

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hob-free hard rock tunneling machine for breaking rocks by utilizing microwaves and liquid nitrogen jet flow
  • Hob-free hard rock tunneling machine for breaking rocks by utilizing microwaves and liquid nitrogen jet flow
  • Hob-free hard rock tunneling machine for breaking rocks by utilizing microwaves and liquid nitrogen jet flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, a kind of hard rock excavator without hob that utilizes microwave and liquid nitrogen jet to break rock, such as figure 1 As shown, including the shield body 8, the shield body 8 is provided with a high-span center drive system 2, the high-span center drive system 2 is connected with or without the hob cutter head 3 through a connecting frame 71 with a span greater than one meter, and the high-span center drive system 2 drives the hobless cutter head 1 to rotate in the circumferential direction. A segment assembly machine 10 and a screw conveyor 12 are arranged inside the shield body 8 , and the feeding end of the screw conveyor 12 is located at the rear side adjacent to the hobless cutter head 1 .

[0037] Since the hobless cutterhead 1 is driven by the high-span center drive system 2, there is enough assembly space at the back of the hobless cutterhead, and a microwave emitter 3 is arranged on the back of the hobless cutterhead 1. The microwave launcher...

Embodiment 2

[0045] Embodiment 2, a kind of hard rock tunneling machine without hob that utilizes microwave and liquid nitrogen jet to break rock, such as Figure 6 and Figure 7 As shown, the liquid nitrogen high-pressure delivery tube includes a stainless steel tube and a stainless steel flexible telescopic tube. The stainless steel tube can effectively maintain the temperature of the liquid nitrogen in the liquid nitrogen high-pressure delivery tube. A telescopic structure specially designed for a certain distance. Both the exterior of the stainless steel pipe and the exterior of the stainless steel flexible telescopic pipe are provided with a polyurethane foam insulation layer 68 to further ensure the temperature of the liquid nitrogen in the liquid nitrogen high-pressure delivery pipe.

[0046] Other structures of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0047] Embodiment 3, a kind of hard rock tunneling machine without hob that utilizes microwave and liquid nitrogen jet to break rock, such as Figure 8 As shown, the connection port of the liquid nitrogen high-pressure delivery pipe adopts a self-developed double hard seal structure. In view of the fact that sealing materials such as nitrile rubber and fluorine rubber cannot be applied to the high pressure and ultra-low temperature of liquid nitrogen, the viscosity and density of liquid nitrogen are smaller than water, and the surface tension is much lower than that of water. Ultra-low temperature, low viscosity, and ultra-low surface tension It is difficult to select the sealing material during the high-pressure transportation of liquid nitrogen, so the specially designed double hard seal structure.

[0048] The double hard seal structure includes an externally threaded cylinder 63 welded and fixed to one end of the liquid nitrogen high-pressure delivery pipe 6 , and a stop s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a hob-free hard rock tunneling machine for breaking rocks by utilizing microwaves and liquid nitrogen jet flow. The technical problems of high cost and long construction periodcaused by maintenance such as cutter replacement of a hob cutterhead when the hob cutterhead is used for tunneling hard rocks are solved. The hob-free hard rock tunneling machine comprises a high-span center driving system connected with a hob-free cutterhead, a microwave emitter is arranged on the hob-free cutterhead, the microwave emitter is connected with a microwave radiation arm, a liquid nitrogen nozzle and a large slag outlet with the opening rate larger than 25% are arranged on the hob-free cutterhead, and the liquid nitrogen nozzle is connected with a liquid nitrogen supply system through a liquid nitrogen high-pressure conveying pipe. A microwave and liquid nitrogen jet flow coupled rock breaking system is adopted, a conventional cutter rock breaking technology is thoroughly abandoned, the problem that abnormal damage is extremely prone to occurring when a metal cutter of the tunneling machine cuts rocks is solved, meanwhile, the excavation efficiency is improved, and the excavation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of the fifth-generation tunnel boring machine, in particular to a hob-less hard rock boring machine which uses microwaves and liquid nitrogen jets to break rock. Background technique [0002] At present, tunnel excavation for rock formations mainly relies on disc-shaped hobs to squeeze rocks to achieve the purpose of breaking rock mass. Yes, but in harder rock formations the hob method is poorly economical. Therefore, need subversive invention a kind of novel roadheader and rock-breaking work method. [0003] After searching, the existing Chinese utility model patent with the application date of 2018.12.25 and the application number of 201822184738.4 discloses a microwave-assisted rock-breaking TBM cutterhead for hard rock, including the main body of the TBM cutterhead. The main body of the TBM cutterhead is mainly composed of It is composed of single-edged rock-breaking hob, double-edged rock-breaking hob...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/087E21D9/06E21D9/00E21D9/093E21D9/12
CPCE21D9/087E21D9/0621E21D9/0642E21D9/124E21D9/001E21D9/093E21D9/0873
Inventor 贾连辉朱英程绍磊王梦凡齐寅
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap