Hinged sealing test device for shield tunneling machine

Abstract

The invention discloses a hinged sealing test device for a shield tunneling machine, which comprises a hinged sealing ring cavity, a fluid medium pipeline and a pressurizing pipeline, wherein the hinged sealing ring cavity is provided with a first filling port and a second filling port; the fluid medium pipeline is connected with the first filling port, is used for filling a fluid medium into thehinged sealing ring cavity and is provided with a first switch valve; the pressurizing pipeline is connected with the second filling port, is used for pressurizing the hinged sealing ring cavity and is provided with a second switch valve. According to the hinged sealing test device for the shield tunneling machine, the fluid medium pipeline and the pressurizing pipeline are separately designed, afluid medium is injected into the hinged sealing ring cavity through a fluid medium pipeline, the pressurizing pipeline is used for boosting the pressure of an internal medium of the hinged sealing ring cavity, the pressure building process is fast, the hinged sealing ring cavity can rapidly and accurately reach the needed pressure, rapid dynamic switching between high pressure and low pressure can be achieved, and the pressure resistance of hinged sealing in the dynamic change process of external pressure can be conveniently tested.

Description

technical field [0001] The invention relates to the technical field of shield machine test equipment, in particular to a shield machine hinge sealing test device. Background technique [0002] As the main excavation equipment for tunnel construction, the shield machine usually includes a front shield, a middle shield and a tail shield. Steering function in process. In addition, due to the large pressure difference between the inside and outside of the shield body during the construction process, in order to prevent sediment or muck from seeping into the shield body from the hinge mechanism, a hinge seal ring is provided in the hinge mechanism. [0003] It is understandable that as the turning radius of the shield machine changes, the hinged sealing ring is subject to constant compression and rebound, especially in the shield construction bid section with a small turning radius, the middle shield and front shield of the shield machine There is a large angle between the midd...

AI Technical Summary

Problems solved by technology

[0006] That is to say, the shield machine hinge seal test device controls the pressure of the muddy water injected into the sealed cavity by adjusting the amount of compressed air in the pressure storage tank. Due to the strong compressibility of the air, the compressed air has no effect on the muddy water. The ability to pressurize is relatively weak. Therefore, the demand for intake and exhaust volume is large, and the pressure building process is slow. It is difficult to achieve the required pressure quickly and accurately, that is, it is difficult to achieve fast dynamic switching between high and low pressure, so that It is impossible to test the pressure resistance performance of the hinged seal during the dynamic change of external pressure

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