Device for testing shear strength of normal-temperature slurry bonding joint of refractory material test piece

Abstract

The invention relates to a device for testing the shearing strength of a normal-temperature slurry bonding joint of a refractory material test piece. According to the technical scheme, a pressure head device (2) is mounted at the left end of the upper part of a base (1); a test piece seat plate (5) is movably mounted on a test piece seat plate slide rail (4) fixed on a base bottom plate (3) of the base (1); a pressing head mounting seat (6) is fixed on the left end surface of a horizontal rod piece of the base upright post (8); a test piece pressing device (7) is arranged between a vertical rod of the base upright post (8) and the pressing head mounting seat (6); an internal thread arranged on the inner wall of the upper part of a concave spherical pressing rod (20) of the pressing head device (2) is in threaded connection with an external thread of a cylindrical pressing rod (21); and a screw rod of an inner hexagon bolt (19) arranged in a cylindrical cavity of the concave spherical surface pressing rod (20) sequentially penetrates through an adjusting spring upper end cover (18), an adjusting spring (17) and an adjusting spring lower end cover (16) and is in threaded connection with a screw hole of the convex spherical surface pressing head (15) through a conical through hole. The device is simple in structure, convenient to debug and accurate in test result.

Description

technical field [0001] The invention belongs to the technical field of shear strength testing devices. In particular, the invention relates to a test device for the shear strength of a refractory material test piece at room temperature mud bonded joints. Background technique [0002] Refractory mud is an indispensable material in the process of lining the high-temperature kiln. Its main function is to bond the refractory bricks to each other, provide the overall structural stability of the lining, and prevent molten metal or slag from flowing into the lining at high temperatures. Infiltration; at the same time, through its own plastic deformation, the thermal stress inside the furnace lining is relieved. During the masonry process and before the oven, the refractory mud between the refractory bricks will inevitably be subject to shear stress; and at high temperatures, the uneven distribution of thermal stress will increase the shear stress of the refractory mud. Therefore,...

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Problems solved by technology

Under the action of the press, the device can apply force to the two bonded samples that are very close to each other, have the same magnitude and point to the opposite direction, so that the bonded test piece will be deformed relative to the bonded joint, so that it can be measured The shear strength of the bonded specimen at the bonding seam is determined, but when the device is not parallel enough to the longitudinal bond generated during the sample production, the semicircular movable indenter in the device can automatically adjust to be parallel to the surface of the specimen, but when When the lateral bonding produced during sample production is not parallel enough, the semicircular movable indenter in the device cannot automatically adjust the surface of the test piece whose lateral bonding is not parallel enough, resulting in errors in the test results

[0005] The above method is also related to the failure mode of the bonded joint, the thickness of the adhesive, and the rigidity of the adherend. Although the operation is convenient, this shear specimen cannot fully represent the shear force.

When testing the shear strength of the refractory mud bonded specimen, since the thickness of the refractory mud joint is 0.5-5mm, it cannot fully meet the requirement that the simple shear stress is parallel to the stress generated by the bonding surface.

[0006] At present, there is no testing device and method for the shear performance of mud bond strength in terms of performance testing of refractory materials.

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