Deep hole rollback type self-cleaning grouting pipeline and method
The invention provides a deep hole retreating type self-cleaning grouting pipeline and method, and relates to the technical field of coal mine grouting supporting, the deep hole retreating type self-cleaning grouting pipeline comprises an outer connector, a pipe column and a cleaning valve which are...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
09.04.2024
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Subjects | |
Online Access | Get full text |
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Summary: | The invention provides a deep hole retreating type self-cleaning grouting pipeline and method, and relates to the technical field of coal mine grouting supporting, the deep hole retreating type self-cleaning grouting pipeline comprises an outer connector, a pipe column and a cleaning valve which are sequentially connected in the first direction, and the outer connector, the pipe column and the cleaning valve are each provided with a grouting channel and a water injection channel; the cleaning valve comprises a piston, a piston cavity, a communicating hole and an elastic piece, the piston is slidably matched in the piston cavity in the first direction and divides the piston cavity into a first cavity and a second cavity, the first cavity communicates with a water injection channel of the cleaning valve, and the communicating hole communicates with a grouting channel of the cleaning valve; the piston is provided with an unlocking position for communicating the communicating hole with the first cavity and a lock |
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Bibliography: | Application Number: CN202311801592 |