Water-supply device of rock drill and rock drill

Abstract

The invention provides a water-supply device of a rock drill. The water-supply device of the rock drill is positioned outside the rock drill and is installed on a bit shank of the rock drill. The water-supply device comprises a water-sealing device, a connecting sheath, and a drill rod with a central hole, wherein one end of the drill rod stretches into the connecting sheath and is fixedly connected with the connecting sheath; the water-sealing device is sleeved outside the connecting sheath and forms a rotary sealing fit with the connecting sheath; a water inlet is formed in the water-sealing device; and the water inlet is communicated with the central hole of the drill rod. The invention further provides a rock drill comprising the water-supply device. According to the technical scheme of the water-supply device, the water-sealing device is not limited in the radial direction so as to decrease the radial pressure from the connecting sheath, decrease the abrasion of the water-sealing device and prolong the service life; the water-sealing device is arranged outside the rock drill, so that the maintenance and the replacement are easily achieved and the cost is lowered; and the water-supply device is arranged outside, so that even if the water sealing device is worn, water cannot flow into the rock drill, and therefore emulsified hydraulic oil cannot be generated.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a water supply device for a rock drill and a rock drill with the water supply device. Background technique [0002] In the related art, the rock drill is supplied with water through its internal shank, and the water sealing is realized through the sealing structure provided at the shank. [0003] A kind of hydraulic rock drill side water injection mechanism is proposed in the related art, as figure 1 As shown, it includes side water injection shell 1, connecting sleeve 2, shank 3, water distribution sleeve assembly, joint 5 and gasket 6, and the water distribution sleeve assembly includes water distribution sleeve 40, water seal 41, spring collar 42 for holes and support Set 43; wherein, the connecting sleeve 2 is set at the tail of the side water injection shell 1; the drill tail 3 passes through the side water injection shell 1, the connecting sleeve 2 and the water distri...

AI Technical Summary

Problems solved by technology

[0005] 1) The seal is easy to wear and has a short life;

[0006] 2) The entire water supply device is installed in the rock drill, so it is difficult to replace the wearing parts and the maintenance cost is high;

[0007] 3) The entire water supply device is installed in the rock drill. Once the sealing device fails, water will flow into the hydraulic system through the rock drill, resulting in emulsification of the hydraulic oil.

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