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Air cushion type direct type pressure balance control system and dredging method thereof

A balanced control, air-cushion technology, applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of low detection accuracy and poor reliability, and achieve the effect of improving control accuracy, reducing difficulty and improving construction safety.

Pending Publication Date: 2019-08-16
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes an air-cushion direct pressure balance control system and its dredging method, which solves the problem of low detection accuracy and poor reliability of the air-cushion mud-water balance shield pressure control system in the prior art. question

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  • Air cushion type direct type pressure balance control system and dredging method thereof
  • Air cushion type direct type pressure balance control system and dredging method thereof
  • Air cushion type direct type pressure balance control system and dredging method thereof

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Embodiment 3

[0029] Embodiment 3, a dredging method of an air cushion type direct pressure balance control system, comprises the following steps:

[0030] S1: Debug each component before work; make each component in a normal state;

[0031] S2: Open the front manual ball valve and the rear manual ball valve, open the pneumatic ball valve, close the water flushing valve, remove the pipeline dredging valve, and the pressure transmitter can monitor the pressure in the mud tank by detecting the pressure in the pressure measuring pipeline. Detection, the pressure transmitter feeds back the signal to the PI controller, compares it with the target value set by the PI controller, and controls the opening or closing of the intake valve and exhaust valve according to the comparison result;

[0032] S3: After the system has been working for a period of time, close the pneumatic ball valve, open the water flushing valve, and perform channel flushing on the external pressure measurement pipeline; the c...

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Abstract

The invention discloses an air cushion type direct type pressure balance control system and a dredging method thereof.The problem that in the prior art an air cushion type slurry balance shield pressure control system has low detection precision and poor reliability is solved. The air cushion type direct type pressure balance control system comprises a pressure measuring passage communicating withaslurrycompartment and a compressed air inlet and outlet passage communicating with an air cushion chamber, a pressure transmitter is arranged in the pressure measuring passage,a PI controller is connected with the pressure measuring passage, an air intake valve and an airoutlet valve are arranged in the compressed air inlet and outlet passage, the pressure transmitter is connected with the inputend of the PI controller, and the air intake valve and the air outlet valve are connected with the output end of the PI controllercorrespondingly. According to the air cushion type direct type pressure balance control system and the dredging method thereof, the pressure of the slurry compartment is directly detected, the support pressure of the top of the slurry compartment is quickly responded,that the fluctuation of the liquid level in the air cushion chamber affects the fluctuation of the support pressure of the top of the slurry compartment is solved, control precision of the slurry balance shield is improved, the difficulty for an operator to control a circulation system is reduced, and tunnel construction safety is improved.

Description

technical field [0001] The invention relates to the technical field of air-cushion mud-water balance shield pressure control, in particular to an air-cushion direct pressure balance control system and a dredging method thereof. Background technique [0002] With the rapid development of shield tunneling technology, more and more cross-river and sea-crossing tunnel projects have been developed at home and abroad. The geological conditions of such projects are complex and the construction is difficult. In order to be suitable for this working condition, large-diameter air cushions must be used. The mud-water balance shield ensures that high mud-water pressure is maintained during the excavation process, improves the stability of the tunnel face, and avoids unfavorable factors such as possible subsidence of the complex stratum surface. The maintenance and precise control of the pressure of the slurry tank directly affects the support pressure of the tunnel face, which is crucia...

Claims

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Application Information

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IPC IPC(8): E21D9/093E21D9/00E21D9/12
CPCE21D9/093E21D9/003E21D9/12Y02E10/20
Inventor 俞培德刘晓瑞顾永升张龙飞袁丹张杰郑永光姚晶赵康峰
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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