Injection device for slag modifier for shield excavation

Abstract

The invention discloses a slag modifier injecting device for shield excavation, and relates to the technical field of medium conveying devices. The invention includes a nozzle, a nozzle ring, a middle support plate, and an elastic sealing plate. An upper raceway is fixed on the side of the pressure ring, and a nozzle mechanism matching the upper raceway is arranged on the top of the upper raceway. The bottom of the nozzle mechanism is fixed by a screw. The connecting ring is fixed with a lower raceway matched with the upper raceway by screws. In the present invention, through the use of the nozzle mechanism, the improver can be evenly sprayed into the muck around the nozzle mechanism through the nozzle, and the surrounding muck is stirred and broken by the cross scraper and the protective knife, so that the improver and the muck The mixing is more uniform, which avoids the problem of mud cake on the cutter head and the wrapping of the screw machine; the ring cap of the nozzle can prevent the dregs from directly acting on the nozzle rubber, and avoid the seal failure caused by excessive wear of the rubber, or the lack of resilience of the rubber seal due to too much dregs situation arises.

Description

technical field [0001] The invention belongs to the technical field of medium conveying devices, in particular to a device for injecting a dregs soil modifier for excavation of shield tunneling. Background technique [0002] The shield machine is a large-scale equipment for tunnel construction. The shield machine is a cylindrical steel component. When using the shield machine for construction, the shield machine cuts the soil while pushing forward along the tunnel axis. The shield machine The shell is the shield, which acts as a temporary support for the unlined tunnel section cut out by the shield machine. The cutting, soil discharge and lining of the shield machine are all carried out under the cover of the shield. [0003] During the construction of earth pressure balance shield tunneling, it is often necessary to inject muck modifier into the soil, and the muck modifier is delivered to the cutter head through the central rotary joint at the front of the shield machine to...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a dregs modifier injection device for shield excavation, which solves the problem that the dregs modifier injection device cannot inject the dregs modifier in place, and the rubber of the dregs modifier spout is easy to wear or tear, The sealing effect is poor or invalid, and the nozzle is clogged.

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