Cooler for cooling on-site welded joint of long steel rail and using method for cooler

Abstract

The invention discloses a cooler for cooling an on-site welded joint of a long steel rail and a using method for the cooler. The cooler is characterized by comprising a walking support, a cooling fan and a cooling wind path distributing device, wherein the cooling wind path distributing device is fixed on the walking support; the cooling fan is arranged on the top of the cooling wind path distributing device; the cooling wind path distributing device has a bottomless empty tank shape; the lower part of the tank body is inwardly folded; wind path partitioning boards and a wind path switch are arranged in the tank; the wind path partitioning boards partition the tank body into a plurality of vertical spaces; and the tops of the wind path partitioning boards are moveably connected with the wind path switch. The using method comprises the following steps of: pushing the cooling wind path distributing device which is connected with an external power supply along the steel rail to a position above the on-site welded joint; turning on a switch of the cooling fan; distributing wind generated by the cooling fan to a part required to be cooled according to a certain sequence and a certain wind amount; and making the center of the cooling wind path distributing device uniformly swing within a range of 10cm around the welded joint so as to fulfill the aim of uniform cooling. The appearance of the welded joint is corrected by using a rule of thermal deformation in the cooling process, so that the appearance qualification rate of the welded joint is improved, the appearance polishing workload is reduced, and the product quality is improved.

Description

technical field [0001] The present invention relates to a cooler for cooling long steel rail on-site welded joints and a method of using the same. Background technique [0002] Welding of long rails is one of the indispensable processes in the construction and maintenance of seamless railway lines. At present, the newly-built railways in my country with passenger cars are basically seamless lines. Seamless lines are rapidly popularized in the railway industry due to their advantages of low noise, high speed and stable operation. With the rapid development of my country's high-speed railways, the requirements for seamless lines are getting higher and higher. The quality of rail welded joints is one of the important factors restricting the improvement of the quality of seamless rails. Especially for the quality of welded joints of long rails on site, natural cooling is adopted for on-site normalizing. Due to the slow cooling rate, the hardness of welded joints after heat tr...

AI Technical Summary

Problems solved by technology

After a period of operation, it is easy to have low joints, which will affect the driving speed and increase the maintenance workload.

Images