Test -tube rack is used in chemistry teaching

The utility model discloses a test -tube rack is used in chemistry teaching, including bottom plate, medium plate, upper plate and dead lever, bottom plate upper portion is equipped with four inter block screw holes, and distributes at four angle symmetrical about the bottom plate center, bottom plate upper portion left side is equipped with big concave type and holds in the palm the pad, the bottom plate lower part is equipped with the sucking disc, the dead lever is thin coarse -texture down, dead lever upper portion is equipped with first retaining ring, the dead lever middle part is equipped with the second retaining ring, the dead lever bottom is equipped with the external screw thread, dead lever and bottom plate threaded connection, the upper plate is equipped with four group's fixed orificess, and distributes at four angle symmetrical about the upper plate center, the upper plate left side is equipped with big circular through -hole, the upper plate right side is equipped with small circle shape throu