An auto-fill two-layer two-half wear resistant elbow of a concrete pump truck consists of an outer-layer protection elbow, an inner-layer heterogeneous wear resistant combined elbow and a wear resistant connecting flange. A filling space is provided between the outer-layer protection elbow and the inner-layer heterogeneous wear resistant combined elbow. The wear resistant elbow is designed as a two-layer two-half unique structure including a protection layer and a wear resistant layer. Upon using the wear resistant elbow for the first time, the concrete grout fills the reserved slit via the heterogenous combined elbow and enters the reserved filling space, allowing the outer-layer protection elbow and the inner-layer heterogeneous wear resistant combined elbow to be fixed as a whole.

A method to make a tubular element to transfer abrasive materials such as concrete, inert materials or suchlike, where the tubular element includes an external tubular component made of steel and an internal tubular component, coaxial to the external tubular component, where the internal tubular component is made of chromium carbide, or other similar material resistant to wear.

A hopper tee having a horizontal portion through which granular material is unloaded from a tank trailer or hopper car, the hopper tee integrally forms a vertical segment, that secures with the bottom of the hopper, to provide for unloading of granular material for usage or storage. The upper front portion of the tee, as it transitions from its vertical segment to the horizontal flow path has secured or cast therewith a ledge, that provides for accumulation of the unloading granular material therein, to function as a wear pad to resist against abrasion and accelerated wear out of the tee, at that location, during prolonged usage.

A two-branch or multi-branch double-layer wear-and-impact-resistant tube and manufacturing method thereof. The wear-and-impact-resistant tube comprises an outer protective tube and an inner wear-resistant assembled tube nested in the outer protective tube. The inner wear-resistant assembled tube comprises two or more tube walls, the two or more tube walls are jointed to form a tube having an annular cross section. The wear-and-impact-resistant tube can be a straight tube or a bent tube. If the wear-and-impact-resistant tube is a straight tube, upper and lower portions of the inner wear-resistant assembled tube employ different structures, and if the wear-and-impact-resistant tube is a bent tube, a large curved portion and a small curved portion of the bent tube employ different structures. The inner assembled tube of the wear-and-impact-resistant tube is divided into at least two portions, and the at least two portions thereof employ different structures. The tube structure extends a service life thereof, improves wear resistance and impact resistance thereof, and reduces a total weight of the tube.

Apparatus, including a pipeline, featuring at least one pipe liner or coating configured to line or coat a pipe for receiving a process fluid flow, configured with at least one chemical taggant or tracer, and also configured to respond to the process fluid flow, and provide an indication about a degree of liner or coating wear or a location of wear in the pipe. The apparatus may also include the pipe having the at least one pipe liner or coating configured therein.

A ceramic-backed elbow featuring an extended chamber which alters the flow of fluent through the elbow section. This chamber is lined with a ceramic material and ceramic tiles. The remainder of the elbow is similarly coated with a ceramic mixture. The elbow could be placed into a coating pan upon the tiles being adhered to the elbow, and the entire elbow may be coated with an abrasive-resistant coating. A thin metal skin may then be applied over the entire surface of the coating.

Method and apparatus for producing a curved tubular segment comprising obtaining a curved external tubular element and a curved internal tubular element made of a material having a resistance to wear greater than that of the curved external tubular element and having a cross section such as to cover at least part of the internal surface of the curved external tubular element. It provides the insertion of the curved internal tubular element inside the curved external tubular element after heating the latter by means of a heating unit. Moreover, to form the curved external tubular element on the exact geometry of the curved internal tubular element a molding unit and a cooling unit are used to obtain a curved tubular segment without spaces between the curved external tubular element and the curved internal tubular element.

A blow-through rotary valve is provided which has a modified geometry to reduce wear from pneumatic conveying of particulate and/or bulk material.

A modular hopper tee including a modified tee box, a tee box liner, a readily detachable inflow adapter for coupling a first pipe to the tee box and a readily detachable outflow adapter for coupling a second pipe to the tee box, the liner and adapters being constructed from an elastomeric polymer such as polyurethane. Each of the inflow and outflow adapters includes a flange portion and a cylinder portion extending through the flange portion, the flange portion dividing the cylinder portion into a first cylinder portion that extends through a sidewall opening of the tee box and sealingly engages the liner and a second cylinder portion that is located outside of the box. A metal cylinder member, which is embedded within the first cylinder portion and surrounds an exterior of the second cylinder portion, is provided for reinforcing the adapter.

The present disclosure discloses a pneumatic conveying system and an optimized configuration method. The pneumatic conveying system uses a pressure-type elephant bionic trunk conveying pipeline to convey a material or uses a suction-type elephant bionic trunk conveying pipeline to convey a material, wherein the pressure-type elephant bionic trunk conveying pipeline is a pipeline with a gradually enlarged inner diameter, and the suction-type elephant bionic trunk conveying pipeline is a pipeline with a gradually reduced inner diameter.