77results about How to "Reduce maintenance and repair workload" patented technology

An elastic split type fastener of a medium and low speed magnetic suspension rail has enough strength and buckling pressure, has large rail vertical, transverse and longitudinal adjusting capacity simultaneously provides rail elasticity and achieves bidirectional vibration attenuation. The elastic split type fastener comprises two groups of connection bolt assemblies arranged transversely at intervals and two groups of anchoring bolt assemblies transversely arranged at intervals, wherein the connection bolt assemblies integrate an H-shaped steel pillow with a connection board, vibration attenuation gaskets are arranged on the contact surfaces of the connection bolt assemblies and the H-shaped steel pillow, an under-pillow elastic cushion plate is arranged between a base plate of the H-shaped steel pillow and the connection board, and connection bolt long round holes extending along the circuit direction and used for enabling the upper portions of the connection bolt assemblies to penetrate through are arranged on the bottoms on two sides of the H-shaped steel pillow; and the anchoring bolt assemblies integrate the connection board and a support rail table, the lower portions of the anchoring bolt assemblies are connected with the support rail table in anchoring mode, a buffering cushion plate is arranged between the connection board and an iron cushion plate at the top surface of the support rail table, and anchoring bolt long round holes extending along the direction perpendicular to the circuit and used for enabling the upper portions of the anchoring bolt assemblies to penetrate through are arranged on the connection board.

The invention relates to the technical field of railroad bridge engineering of mixed passenger and freight railways, in particular to a simply supported T beam sidewalk combination structure and a combination method of a mixed passenger and freight railway. The combination structure comprises embedded parts, a steel cross beam and a prefabricated reinforced concrete slab, wherein the embedded parts are arranged in a prefabricated retaining track wall of the mixed passenger and freight railway, and the root portion of the steel cross beam is fixedly connected with the embedded parts. The upper surface of the steel cross beam and the upper surface of the prefabricated retaining track wall are located on the same plane. The prefabricated reinforced concrete slab is arranged on the upper surface of the steel cross beam and comprises a transverse branch and one or more vertical branches, the vertical branches are fixedly connected with the transverse branch and upwards extend from the upper surface of the transverse branch, and extending-out steel bars are outwards reserved at the root portion of the transverse branch. The upper surfaces of the vertical branches are covered with an active powder concrete RPC cover plate. The integrity of the combination structure is improved, convenience is brought to cable laying, steel members and a welding material are both weathering resistant steel, and the work amount of later maintenance or repair is decreased.

The invention relates to a silastic bushing expansion device. The invention is characterized in that the tail end of an expansion head is provided with an empty cavity; a spiral supporting pipe is inserted into the empty cavity and is provided with a top rod; the top rod can support a spiral supporting pipe; the top rod and a support saddle thereof are connected in an inserting way; a nylon net sleeve is arranged between a silastic tube and the expansion head as a spacer. The air clearance formed after the nylon net sleeve is sheathed on the expansion head can reduce much resistance in the silastic tube and hauls a silastic piece on a plastic spiral pipe by proper force. The silastic bushing expansion device has the advantages of clean expansion, non-large mechanical power and being suitable for the expansion of a short and thick pipe.