The DTH hammer is an integral part of the DTH drilling rig and belongs to the working device of the DTH drilling rig. Widely used in metallurgy, coal, chemical industry, water conservancy, hydropower, highway, railway, national defense, construction and other engineering hole forming operations. There are also many DTH hammer products gradually appearing on the market, how to choose the most suitable DTH hammer in the application becomes extremely important.

1. The size of the DTH hammer

Usually, the size of the DTH hammer should be selected as close as possible to the size of the hole to be drilled. The larger the diameter of the DTH hammer, the larger the diameter of the piston and the higher the working efficiency. Not only that, but the large-diameter DTH hammer has a large tail body diameter and good energy transfer, which results in high strength and low stress, which makes the work more reliable and less expensive.

Of course, the choice of DTH hammer does not depend entirely on the size of the drilled hole, because the mobility and investment costs of the use of the DTH hammer need to be considered.

2. Air consumption of DTH hammer

The choice of DTH hammer is affected by the air volume of the air compressor. It is usually best to choose a DTH hammer that is close to the highest operating conditions of the air compressor. The greater the working pressure of the DTH hammer, the better the working efficiency. If a manufacturer with creativity and advanced technology is used, the DTH hammer can also be used under different conditions to obtain better results and performance.

3. Characteristics of DTH hammer

The characteristics of different types of DTH hammers are different. Its characteristics mostly depend on their design and working pressure. It is customary to use two parameters to describe the characteristics of the DTH hammer, namely impact energy and impact frequency (strokes/min). Simply put, a DTH hammer with a small impact energy and high impact frequency works well in soft, fractured formations, and the opposite is true in hard rock conditions. When comparing two DTH hammers with impact energy and impact frequency, special attention should be paid to the fact that the data obtained by testing on the test bench will not be completely consistent with the data obtained under actual drilling conditions. The characteristics of DTH hammer and drill bit are the main factors affecting the drilling effect.

Conclusion

When choosing a DTH hammer, we need to be based on the required drilling size, the possible air consumption and the characteristics of different types of DTH hammers.