What are the types of rock drilling tools?
With the rapid development of China's economic construction, the demand for rock drilling tools in construction engineering fields such as mining, energy construction, basic engineering construction, and traffic road development is showing an upward trend. At the same time, the types, performance and quality of drilling tools are also proposed. higher requirement.
As a drilling steel and drilling tool manufacturer, it is necessary to understand and master the types of drilling tool products, use sites and market development trends, in order to produce more and better drilling tool products, meet market demand and improve China's rock drilling and drilling tool products. The overall level. According to the types of rock drilling machinery used in rock and soil drilling engineering, the supporting rock drilling (drilling) products can be roughly divided into six types: 1. Top hammer percussion drilling tools; 2. Down-the-hole percussion drilling Tools; 3. Mine roller cone drilling tools; 4. Reverse raise drilling tools; 5. Mechanical cutting drilling tools; 6. Geological exploration drilling tools.
1. Top hammer impact drilling tools
Top hammer percussive rock drilling is that the rock drilling machine is located at the top of the drill tool, and the piston of the rock drill directly hits the tail end of the drill tool, and the generated impact energy passes through the rod body to the drill bit to do work on the rock in the form of a stress wave. The rock drilling machine used in this rock drilling method uses compressed gas or hydraulic oil as the power source, and the impact power can be designed according to the equipment requirements, so it has a higher rock drilling rate. The blast hole depth of the top hammer percussion rock drilling tool is usually ≤35m, and the hole diameter is ≤152mm. Top hammer percussion rock drilling tools products include:
1 Drilling tools for light rock drills
Lightweight rock drilling machinery refers to manually operated rock drilling machinery. The dead weight of this type of rock drilling machinery is less than 35kg. It uses manual hand-held or pneumatic leg support as a working platform. The impact energy and propulsion force of rock drilling are relatively small. The commonly used drilling tools are H19mm , H22mm, H25mm hexagonal integral drill rod and cone connecting drill rod, 38-42mm sheet-shaped in-line drill bit, cross bit, and four-tooth and five-tooth button bit, which are currently the most used chisel in China One of the products of rock drilling tools.
In the domestic rock-drilling tool engineering market, the most used light-duty rock drill tools are H22mm cone connecting drill rods and sheet-shaped in-line drill bits. The annual output of domestic drilling tool manufacturers can reach nearly 100,000 tons/year of H22mm cone connecting rods (converted to more than 16 million pieces), and 33-35 million φ38-42mm flat-shaped drill bits/ year. The φ38-43mm ball four-tooth and five-tooth cone connection drill bit is a kind of light rock drill tool product developed in recent years that is matched with the H22mm cone drill rod. Due to its relatively stable service life, it is used in hard and brittle rocks. The drilling speed is relatively fast, which has been paid attention to by the construction unit, and the production volume is increasing year by year.
