压板/压轨器

It is also called welded rail roller, welded rail fixing device, steel beam rail plate, and welded pressing plate, which are used to compress and fix rails.

It is usually welded on H-shaped steel beams and sometimes used on steel plates embedded in concrete. It is composed of base, upper cover, threaded washer and spring washer. There are two kinds of materials: semi cast steel and full cast steel.