Mounting rack for platinum tube channel

The utility model discloses a mounting rack for a platinum tube channel. The mounting rack comprises a frame main body (1), the frame main body (1) comprises an upper frame (2) and a lower frame (3) which are distributed up and down, and a plurality of uniformly distributed connecting rods (4) are connected between two side edges of the upper frame (2) and the lower frame (3); a thermal insulation wall (5) formed by stacking thermal insulation bricks is arranged in the lower frame (3), and the top end of the thermal insulation wall (5) does not exceed the top end of the upper frame (2); a containing cavity (6) is formed in the heat preservation wall (5), a platinum pipe (7) is arranged in the containing cavity (6), and the periphery, corresponding to the platinum pipe (7), in the containing cavity (6) is evenly filled with a hollow ball layer (8) composed of aluminum oxide hollow ball particles. The thermal expansion influence of the platinum tube can be eliminated, and the platinum tube has the advantages of