Roadheader earth pressure balance method and screw machine control device
An earth pressure balance and screw machine technology, which is applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of surface subsidence, accurate adjustment, and inability to achieve the speed of the screw machine.
Active Publication Date: 2019-03-26
CHINA RAILWAY CONSTR HEAVY IND
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Problems solved by technology
[0004] However, the existing earth pressure balance method needs to rely on the personal experience and perceptual thinking of the operator of the shield machine during the implementation process, and cannot accurately adjust the speed of the screw machine, which often leads to subsidence of the ground surface , collapse, uplift or cracking and other issues
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[0028] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
[0029] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.
[0030] In addition, the steps shown in the flow dia...
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The invention provides a heading machine earth pressure balance method and a screw conveyor control device. The heading machine earth pressure balance method includes: acquiring an excavation diameter, a heading speed, and the expansion rate of a heading machine in a heading starting stage, and calculating a first target rotation speed of a screw conveyor according to the excavation diameter, theheading speed, and the expansion rate of the heading machine; adjusting the actual rotation speed of the screw conveyor and allowing the actual rotation speed to reach and maintain at the first targetrotation speed; acquiring the actual earth chamber pressure of the heading machine in a heading stage, determining a closed loop adjustment target rotation speed of the screw conveyor according to apreset earth chamber pressure threshold and the actual earth chamber pressure, and adjusting the actual rotation speed of the screw conveyor according to the closed loop adjustment target rotation speed and the first target rotation speed so as to allow the actual earth chamber pressure to approach or be equal to the preset earth chamber pressure threshold. The method can efficiently and accurately keep the earth chamber pressure of the heading machine balance, and can avoid the problem of ground depression, collapse, uplifting and cracking.
Description
technical field [0001] The invention relates to the technical field of roadheaders, in particular to an earth pressure balance method for roadheaders and a screw machine control device. Background technique [0002] During the working process of the existing earth pressure balance shield machine, the thrust of the shield jack will be transmitted to the mud slurry in the soil bin through the pressure-bearing partition, so that the pressure of the mud slurry will act on the excavation surface to offset The groundwater pressure and soil pressure from the excavation surface can form a balance to ensure the stability of the excavation surface. [0003] Specifically, the earth pressure balance method used by the existing earth pressure balance shield machine is to monitor the earth pressure during the excavation process for a long time through the earth pressure gauge installed on the partition wall of the earth chamber of the shield machine, and then detect The obtained soil pre...
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IPC IPC(8): E21D9/08E21D9/12
Inventor 刘飞香程永亮蔡杰冉渊谭新马金云叶祥莉贺泊宁
Owner CHINA RAILWAY CONSTR HEAVY IND