The single hydraulic prop is a key support equipment for underground coal mine, mainly used for temporary support in tunnels and coal mining faces. Driven by hydraulic power, it adjusts the supporting force through the extension and retraction of the piston rod, featuring a compact structure and strong bearing capacity, with a single prop capable of supporting up to several tens to hundreds of tons. The prop consists of the cylinder body, rod, triple valve (check valve, safety valve, relief valve), and sealing parts, which completes the cycle of lifting the prop, initial support, pressure maintenance, and lowering the prop by utilizing the hydraulic transmission principle.
How are single hydraulic props models distinguished? That's what we're going to discuss in this article.
1. The single hydraulic props are categorized into externally supplied fluid (shortened to external injection) and internally supplied fluid (shortened to internal injection) types, based on the supply method and working fluid.
2. The single hydraulic props are categorized by their working stroke, with single telescopic (single stroke) props and double telescopic (double stroke) props. Unless otherwise specified, the props are single telescopic.
3. Single hydraulic props are categorized by the material used, including ordinary steel props, high-titanium alloy props, aluminum alloy props, and stainless steel props, among others. Unless otherwise specified, steel props are assumed.
4. Monolithic hydraulic props can be divided into two main categories based on their layout: piston-type props and plunger-suspended props. The piston-type props are further categorized into single telescopic and double telescopic props. The plunger-suspended props use water as the medium and are classified as "environmentally friendly" props.