A cutter bit assembly for use in underground mining, road grading, and the like includes a water spray assembly having a water nozzle in a first chamber that discharges a water spray through an air gap and into the open end of a second chamber facing the air gap. Air is drawn into the water spray entering the second chamber from the air gap to produce a finer spray that is discharged from a second open end of the second chamber. The water spray helps clear the second chamber of any dirt or debris drawn by the air into the second chamber.

A cutter bit assembly for use in underground mining, road grading, and the like includes a water spray assembly having a water nozzle in a first chamber that discharges a water spray through an air gap and into the open end of a second chamber facing the air gap. Air is drawn into the water spray entering the second chamber from the air gap to produce a finer spray that is discharged from a second open end of the second chamber. The water spray helps clear the second chamber of any dirt or debris drawn by the air into the second chamber.

A cutting bit assembly includes a block, a bit sleeve, and a seal. The block includes a first bore and a fluid passage. The fluid passage includes a first portion and a second portion in fluid communication with the first portion. The first portion is oriented obliquely with respect to the first bore, and the second portion extends at least partially around the perimeter of the first bore. The bit sleeve includes a shank, a flange, and a second bore extending through the shank and the flange. The shank is positioned within the first bore of the block such that a surface of the flange engages a first end surface of the block. The seal is positioned between the second portion of the fluid passage and the shank to prevent contact between a fluid in the fluid passage and the outer surface of the shank.

A cutting bit assembly includes a block, a bit sleeve, and a seal. The block includes a first bore and a fluid passage. The fluid passage includes a first portion and a second portion in fluid communication with the first portion. The first portion is oriented obliquely with respect to the first bore, and the second portion extends at least partially around the perimeter of the first bore. The bit sleeve includes a shank, a flange, and a second bore extending through the shank and the flange. The shank is positioned within the first bore of the block such that a surface of the flange engages a first end surface of the block. The seal is positioned between the second portion of the fluid passage and the shank to prevent contact between a fluid in the fluid passage and the outer surface of the shank.

A block for use in a cutting assembly wherein the block includes a block body that contains a reservoir with coolant therein. The block body contains a top passage operative communication with the reservoir so as to receive coolant. The top passage has an axial forward top passage section terminating in an axial forward top passage end. The axial forward top passage section has an axial forward top passage section central longitudinal axis. The top passage further has an axial rearward top passage section terminating in an axial rearward top passage end. The axial rearward top passage section has axial rearward top passage section central longitudinal axis. The axial forward top passage section central longitudinal axis is disposed at an angle with respect to the axial rearward top passage section central longitudinal axis.

A block for use in a cutting assembly wherein the block includes a block body that contains a reservoir with coolant therein. The block body contains a top passage operative communication with the reservoir so as to receive coolant. The top passage has an axial forward top passage section terminating in an axial forward top passage end. The axial forward top passage section has an axial forward top passage section central longitudinal axis. The top passage further has an axial rearward top passage section terminating in an axial rearward top passage end. The axial rearward top passage section has axial rearward top passage section central longitudinal axis. The axial forward top passage section central longitudinal axis is disposed at an angle with respect to the axial rearward top passage section central longitudinal axis.

The invention discloses a tunnel boring machine (TBM) equipped with a high-pressure water jet cutting system and a combined tunneling method, comprising a TBM body, the water pump unit on the body, and the high-pressure water jet cutting system at the front end of the body. The high-pressure water jet cutting system comprises a water jet-mechanical combined cutter head, water jet-shell knife combined cutters, a high-pressure water pipeline, a multi-medium rotary center, and a water jet diversion valve block. The high-pressure water at the pump unit is transmitted to the multi-medium rotary center through the high-pressure water conveying pipeline, and then divided into multiple paths by the water jet diverter valve block, and respectively supplied to each of the combined cutters on the water jet-mechanical combined cutter head. This invention offers practical suggestions and references for the overall design, and spatial arrangement of the high-pressure water jet cutting system.

The invention discloses a tunnel boring machine (TBM) equipped with a high-pressure water jet cutting system and a combined tunneling method, comprising a TBM body, the water pump unit on the body, and the high-pressure water jet cutting system at the front end of the body. The high-pressure water jet cutting system comprises a water jet-mechanical combined cutter head, water jet-shell knife combined cutters, a high-pressure water pipeline, a multi-medium rotary center, and a water jet diversion valve block. The high-pressure water at the pump unit is transmitted to the multi-medium rotary center through the high-pressure water conveying pipeline, and then divided into multiple paths by the water jet diverter valve block, and respectively supplied to each of the combined cutters on the water jet-mechanical combined cutter head. This invention offers practical suggestions and references for the overall design, and spatial arrangement of the high-pressure water jet cutting system.

The invention discloses a tunnel boring machine (TBM) equipped with a high-pressure water jet cutting system and a combined tunneling method, comprising a TBM body, the water pump unit on the body, and the high-pressure water jet cutting system at the front end of the body. The high-pressure water jet cutting system comprises a water jet-mechanical combined cutter head, water jet-shell knife combined cutters, a high-pressure water pipeline, a multi-medium rotary center, and a water jet diversion valve block. The high-pressure water at the pump unit is transmitted to the multi-medium rotary center through the high-pressure water conveying pipeline, and then divided into multiple paths by the water jet diverter valve block, and respectively supplied to each of the combined cutters on the water jet-mechanical combined cutter head. This invention offers practical suggestions and references for the overall design, and spatial arrangement of the high-pressure water jet cutting system.