Don't let your down-the-hole hammer "work with illness"

For people engaged in drilling operations in mining, water conservancy, construction and other engineering projects, the down-the-hole hammer is a very familiar device. As a key working device of the down-the-hole drill, it has reliable performance and is an ideal equipment for drilling blast holes. But to keep the down-the-hole hammer in good working condition, correct maintenance is essential.

Let's first understand the working principle of the down-the-hole hammer. At the beginning of the impact stroke, the piston and the valve plate are both at the top position. At this time, the compressed air enters the upper chamber of the cylinder through the radial holes of the valve cover and the valve seat, pushing the piston downward to impact the drill bit at high speed. When the piston moves to the spline groove of the bushing and is closed, the pressure in the lower chamber begins to rise, the center hole at the upper end of the piston leaves the gas distribution rod, the upper chamber is connected to the atmosphere, the pressure decreases, and the working stroke ends. After the piston impacts the tail of the drill bit, the valve plate changes direction due to the pressure difference between the upper and lower parts, and the piston repeats the return stroke movement.

The down-the-hole hammer is like a vehicle. Only correct use and maintenance can extend its service life. If you don't pay attention to maintenance, just like a person's body lacks exercise for a long time, resistance decreases and it is easy to get sick, the down-the-hole hammer will also have various problems.

Before using the down-the-hole hammer, whether it is new or old equipment, you must carefully check it. Whether the connection between the joint and the outer sleeve is firm, whether the piston moves smoothly, whether the drill bit and the down-the-hole hammer are connected correctly, and whether the drill rod, drilling rig, air compressor and other related parts are ready, only after confirmation can the drilling operation begin.

During use, lubricants play a key role. High-quality lubricants can reduce wear, prevent rust, resist oxidation and seal gaps. The down-the-hole hammer relies on compressed air to drive the piston to move at high frequency to provide rock-breaking impact work for the drill bit. Any high-speed moving parts require good lubrication, and the down-the-hole hammer is no exception. If there is a lack of lubrication or the lubrication effect is poor, the internal moving parts of the down-the-hole hammer, especially the piston, will suffer from early wear and fatigue, and early fatigue cracks will form on the surface of the piston, which will not only seriously affect the life of the piston and increase the cost of use, but also bring many inconveniences to the construction.

After using the machine, clean the parts of the down-the-hole hammer in time. In many cases, the wear of the outer sleeve or the internal parts will cause the performance of the hammer to deteriorate. At this time, the down-the-hole hammer needs to be repaired and inspected more carefully. If all parts are in good condition, apply lubricating oil and install them correctly according to the assembly diagram and keep them properly. In order to ensure that the down-the-hole hammer always maintains the best performance, it is recommended to perform regular maintenance.