Inclined shaft heading machine shield body internal pumping device and drainage system

Abstract

The invention discloses an inclined shaft heading machine shield body internal pumping device and a drainage system. The pumping device comprises an impeller arranged in an impeller cavity and a power device for driving the impeller to rotate, and further comprises a sealing device for sealing a gap between an output shaft and a shaft hole; the sealing device includes a sleeve; at least two sealing rings sleeved on the output shaft for sealing a through hole of the sleeve are spaced in the through hole of the sleeve; and grease is fully injected in an annular gap between the sealing rings. As two sealing rings are arranged in the sleeve between the power device and the impeller cavity, the sealing performance of the pumping device is effectively improved, and cement slurry and stone powder are prevented from permeating into the power device. The drainage system adopts the pumping device to pump sewage, adopts independent hydraulic oil pump and oil tank corresponding to a hydraulic system of a heading machine, and prevents hydraulic oil in the pumping device from carrying the sewage into the hydraulic system of the heading machine to pollute the hydraulic system of the heading machine.

Description

technical field [0001] The invention relates to the technical field of water pumping devices for roadheaders, in particular to a water pumping device and a drainage system inside a shield body of an inclined shaft roadheader. Background technique [0002] During the construction of the inclined shaft boring machine, after the segment is installed in the tunnel, pea stones and cement slurry need to be injected into the back of the segment. Under the action of gravity, the cement slurry will flow along the bottom of the tunnel to the bottom of the shield, so that , There will be a large amount of sewage mixed with cement slurry and stone powder at the bottom of the shield body of the tunneling machine. If the sewage is not discharged, it will flood the main drive motor, electrical box and other electrical equipment, causing damage to the equipment, and even causing dangers such as electric leakage. [0003] Existing inclined shaft tunneling machines generally use electric subm...

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Problems solved by technology

[0002] During the construction of the inclined shaft boring machine, after the segment is installed in the tunnel, it is necessary to inject pea stones and cement slurry on the back of the segment. Under the action of gravity, the cement slurry will flow along the bottom of the tunnel to the bottom of the shield, so that , There will be a large amount of sewage mixed with cement slurry and stone powder at the bottom of the shield body of the tunneling machine. If the sewage is not discharged, it will flood the main drive motor, electrical box and other electrical equipment, causing equipment damage, and even causing dangers such as electric leakage.

[0003] Existing inclined shaft tunneling machines generally use electric submersible pumps to discharge the sewage in the shield body to the sewage tank at the back of the boring machine. Using electric submersible pumps will cause the following problems: the electric submersible pump uses a mechanical seal to separate Motor winding and impeller chamber, the working principle of the mechanical seal is that the moving ring rotates relative to the static ring, forming a seal between the moving ring and the static ring, and particles such as cement slurry and stone powder at the bottom of the shield are easy to penetrate into the moving ring and static ring of the mechanical seal After the electric submersible pump works for a long time, the mechanical seal will lose its sealing ability due to wear, and the sewage will seep into the motor winding of the electric submersible pump, which will cause the electric submersible pump motor winding to short-circuit and fail.

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