Xiang an Xuanhua Zhengyi Down-the-Hole Drilling Rig

A down-the-hole drill, usually called DTH by most professionals, is basically a jackhammer screwed on the bottom of a drill string. The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a fluid (air, water or drilling mud). The DTH hammer is one of the fastest ways to drill. . DTH is short for “down-the-hole”. Since the DTH method was originally developed to drill large-diameter holes downwards in surface-drilling. . A is first thought to have been used for rock drilling in 1844. Many quarries used hand held tools that required the driller to suspend himself from a rope over the. . In DTH drilling, the percussion mechanism – commonly called the hammer – is located directly above the drill bit. The drill pipes transmit the necessary feed force and rotation to the hammer and the bit, along with the fluid (air, water or drilling mud) used to. . DTH products can be used in the following applications:• Mining- drill and blast holes in open pit mining, where the drill operator will drill several holes, then. [pdf]

Anxi Xuanhua Down-the-Hole Drilling Rig

The working principle of the down-the-hole drilling rigis: compressed air drives the piston in the impactor, hitting the drill bit for rock drilling. The characteristic of this drilling method is that the. . Down-the-hole rock drilling refers to a rock drilling method in which an impact mechanism is submerged into the blasthole. The torque of the slewing mechanism rotates the impactor and the drill. . The biggest difference between down-the-hole hammerand top hammer lies in the position where the impact force acts. As shown in the figure, the down-the-hole type, the impact force directly acts on the tail of the drill bit, which is what we call the drill bit; the top hammer type, generally transmits the hammering force provided by the rock drill . [pdf]

Air compressor electric drain pneumatic drain valve

Float drainscontain a float within the device that normally seats on a small orifice. When liquid enters the drain the float rises off its seat, exposing the orifice and allowing liquid to discharge through the stem. As the liquid level drops, the float re-seats and seals the orifice. These drains operate only when a. . Pneumatic drainsare simple and robust.They rely on a pneumatic pilot signal to operate and use a ball valve to eject the moisture from the air system. As mentioned in the video, the. . Electronic drainsrequire electricity and, unlike the other drain models, can be adjusted for frequency and duration of the discharge time. Electronic drainsincorporate a solenoid. [pdf]