Rear-mounted double-channel abrasive jet cutting device

A rear-mounted double-channel abrasive jet cutting device, characterized by comprising an ultra-high pressure water jet supply system and an abrasive supply system, wherein the ultra-high pressure water jet supply system is used to provide a continuous high pressure water jet power source, abrasive transfer is provided by the abrasive supply system, and cutting is performed by a high pressure abrasive jet formed by mixing abrasive into the water jet power source, thus to enhance a hitting force for cutting;

• wherein the ultra-high-pressure water jet refers to a high-pressure water jet with a pressure of not less than 10 MPa;
• the abrasive supply system comprises an abrasive tank and a feeding pump which are in communication with each other, a pressure cap is arranged on the abrasive tank, the abrasive tank is connected with an abrasive transfer hose, and one end of the abrasive transfer hose away from the abrasive tank is provided with an abrasive rotary sealing water swivel;
• the abrasive rotary sealing water swivel comprises a water swivel outer wall, wherein the water swivel outer wall is internally divided into a water swivel high pressure water channel and a water swivel abrasive channel by a water swivel inner wall, a sealing rotary body outer bayonet is arranged on the water swivel outer wall, a sealing rotary body is arranged in the sealing rotary body outer bayonet through sealing bearings, abrasive feeding holes in communication with the water swivel abrasive channel are formed in the sealing rotary body outer bayonet, and water swivel abrasive transfer holes are formed in one end of the water swivel abrasive channel;
• six abrasive feeding holes are symmetrically distributed in the water swivel inner wall.