Mining hose connecting device and method

A mining hose connecting device for connecting a first hose and a second hose, comprising:

• a joint unit, wherein the joint unit comprises a first joint and a second joint, an inner diameter of the first joint is matched with an outer diameter of the first hose, and the inner diameter of the second joint is matched with the outer diameter of the second hose;
• wherein the inner diameter of the first joint is bonded with the first hose, and the inner diameter of the second joint is bonded with the second hose;
• a first fastening unit, wherein the first fastening unit is arranged symmetrically about a first plane, the inner diameter of the first fastening unit is respectively in clearance fit with outer diameters of the first joint and the second joint, and the first plane is parallel to an extension direction of the first fastening unit;
• a second fastening unit, comprising a first fastener and a second fastener, wherein inner diameters of the first fastener and the second fastener are respectively in clearance fit with the outer diameter of the first fastening unit;
• and
• a washer arranged at a connection of the first joint and the second joint, wherein the washer comprises a washer body and a backing ring, the washer body comprises a channel for media to circulate, both ends of the washer body are respectively matched with second inner diameters of the first joint and the second joint, the backing ring is connected with the washer body, the outer diameter of the backing ring is larger than the washer body, the backing ring is arranged at the connection of the first joint and the second joint;
• and the backing ring is also provided with a seal ring.