The furnace roller is the most important equipment in the CSP (Compact Strip Production, compact strip steel production line) roller hearth heating furnace.  It is mainly composed of a supporting roller shaft, a water-cooled steel pipe, a metal roller body, a heat-resistant metal roller ring, and a refractory thermal insulation lining between the roller rings. What about high temperature furnace rolls for CSP furnaces up to 1300°C? . In order to achieve the above-mentioned purpose, Qingdao Hexin Machinery Co., Ltd. found a new invention. A high-temperature furnace roll for a CSP heating furnace designed by the invention includes a tubular steel shaft for the roll body, and the outer wall of the steel shaft for the roll body is formed. Roller rings are arranged at intervals, and heat insulating linings are arranged on the outer wall of the steel shaft of the roll body between the adjacent roll rings. A water-cooled pipe is arranged inside the steel shaft of the roll body, and one end of the water-cooled pipe is provided with a water-cooled pipe support clip The outer side of the end of the water-cooled tube support holder is provided with a roll body end baffle that is sealedly connected to the inner wall of the roll body steel shaft, and a first cavity is provided between the roll body steel shaft and the water-cooled tube. The wall of the water-cooled tube close to the water-cooled tube support holder is provided with water outlet through holes evenly distributed along the circumferential direction, and the water outlet through holes communicate with the water inlet end and the first cavity in the water-cooled tube to form a closed water path. As one of the preferred solutions, the roll ring is provided with a second cavity, the roll body steel shaft is composed of segmented roll body steel shafts, and the two ends of each segmented roll body steel shaft are respectively connected to the adjacent rollers. The ends of the rings are connected, and the first cavity communicates with the second cavity through the gaps between the steel shafts of each segmented roll body. Further, the outer wall of the water-cooling tube between the steel shafts of the adjacent segmented roll bodies is provided with an annular partition plate, and the annular partition plate extends into the second cavity and is provided with a gap with the outer wall of the second cavity, so The gap is communicated with the first cavity. As the second preferred solution, a second cavity is set in the roll ring, the steel shaft of the roll body is a steel pipe separating the first cavity and the second cavity, and the steel shaft of the roll body is close to the water cooling A roller ring water-cooling interface is arranged on one end side wall of the tube support holder; the pipe wall connecting the water-cooled tube and the water-cooled tube support holder is provided with water outlet holes uniformly distributed along the circumferential direction; the water-cooled tube support holder is connected to the water-cooled tube The fitting surface of the pipe is provided with an annular inner groove, the annular inner groove is provided with radial through holes uniformly distributed along the circumferential direction, and the radial through holes correspond to the water outlet holes; the heat insulating lining An outer water-cooling pipe is arranged in the inner axial direction, and the outer water-cooling pipe is communicated with each second cavity; the outer water-cooling pipe, the roller ring water-cooling interface, the radial through hole, the water outlet hole and the water inlet end in the water-cooling pipe are connected. to form a closed waterway. Further, the outer wall of the steel shaft of the roll body corresponding to the second cavity is provided with an annular roll body water-cooling partition, the roll body water-cooling partition extends into the second cavity and is connected with the second cavity. A space is provided between the outer walls of the cavity, and the space is communicated with the outer water cooling pipe.
In the above technical solution, the roller ring consists of an annular inner ring of the roller ring and an outer ring of the roller ring, and the outer ring of the roller ring is welded on the outer surface of the inner ring of the roller ring. Further, the material of the inner ring of the roller ring is the same as that of the steel shaft of the roller body, or is made of lCrl9Ni9Ti, Cr25Ni20 or Cr28Ni48 heat-resistant steel; the outer ring of the roller ring is made of Co20 or Cr28Ni48W5Co5 heat-resistant steel. In the above technical solution, one end of the water-cooling tube connected with the water-cooling tube support holder is a cone-shaped conical head, and the mating surface of the water-cooled tube support holder and the water-cooled tube is in the shape of a rounded cone. The working principle of the present invention is such that since the first cavity, the water inlet end and the water outlet through hole form a first closed water path, when the cooling water flows from the water inlet end to the first cavity, a single water cooling channel can be formed to reduce the The temperature of the roll body steel shaft and the roll ring. The water outlet hole set in the water cooling tube, the outer water cooling tube set in the heat insulation lining, the radial through hole set in the water cooling tube support holder, the roller ring water cooling interface set on the steel shaft of the roll body, and the water inlet end in the water cooling tube form the first part. Two closed water channels, when the cooling water flows from the water inlet to the outer water cooling tube and the first cavity, the two closed water channels can respectively cool the steel shaft of the roll body and the roll ring, thereby forming double water cooling channels. Both of these two cooling methods can strengthen the local cooling strength of the roll ring and homogenize the water cooling strength of the roll body; by using ordinary stainless steel to make the water cooling pipe, the corrosion resistance of the water cooling pipe is improved; the water cooling pipe supports the card seat The rounded table structure or the rounded table structure with annular inner grooves and radial through holes, and the water-cooled tube support bracket is welded and fixed with the roller body end baffle, while the inner grooves, radial through holes and the roller ring are welded and fixed. The water-cooling interface is connected, which greatly enhances the support stability of the water-cooled tube support holder, which is convenient for the installation of the water-cooled tube and the formation of the water-cooled channel of the roll ring; the thermal insulation lining can improve the thermal insulation effect of the steel shaft of the roll body and increase the heating temperature in the billet furnace. Through the above measures, the performance requirements of high-temperature furnace rolls for CSP heating furnaces are finally achieved, the maintenance and production costs of furnace rolls are reduced, the service life of furnace rolls is prolonged, and the operation efficiency and production efficiency of CSP heating furnaces are improved. The invention has the advantages of simple structure, convenient manufacture, convenient use and maintenance, low cost, and a service temperature of up to 1300° C., which provides an important idea for the cost reduction and comprehensive performance improvement of the furnace roller.