Inspection tools and inspection methods for panel size in sleeper steel formwork

Abstract

The invention discloses a tool and a method for inspecting a size of a jointed board in a sleeper steel mold. The tool comprises a horizontal transverse board, side bumps (1) arranged at the lower ends of the left side and the right side of the horizontal transverse board, and a middle bump (2) in the middle, wherein the planarity of measurement surfaces of the side bumps (1) and the measurement surface of the middle bump (2) is smaller than 0.05; the parallelism between the measurement surfaces of the side bumps (1) and the measurement surface of the middle bump (2) is smaller than 0.1; and the height difference (h+1) mm between the side bumps (1) and the middle bump (2) is selected according to the design size of the steel mold. With the adoption of the tool and the method, the measurement process of the sleeper steel mold can be simplified, and the measurement accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of prestressed concrete sleeper steel formwork, in particular to a test tool and a test method for the panel size in the sleeper steel formwork, and can also be used in other fields where it is difficult to directly measure the relative height difference of an object and a certain accuracy needs to be controlled. Background technique [0002] In the production of sleepers, there is an inspection item of the distance from the upper row of steel wires to the top. This item is an item that often exceeds the standard in the inspection indicators of sleepers. The main factor affecting this size on the sleeper steel mold is the height of the middle panel. Traditional sleepers The inspection of the height of the jigsaw in the steel mold is all measured by the string line (at the tension center of the steel mold) and the method of using a steel ruler. The following problems existed in the actual inspection process: ...

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Problems solved by technology

[0003] 1) When measuring with a straight ruler after drawing the string, the space is limited due to the size of the steel mold, and the line of sight is difficult to be perpendicular to the distance measurement, which will cause a certain visual error; in addition, when the string is fixed, there will also be a certain error, which will accumulate. large error

[0004] 2) The scale of the steel ruler is generally 1.0mm, and the smallest is only 0.5mm, which has a certain lack of measurement accuracy

[0005] 3) Since the string can only be pulled in the middle of the longitudinal shell of the steel mold, if the middle panel is tilted, it cannot be measured, and only the centerline position of the middle panel in the steel mold can be measured

[0006] 4) When inspecting the strings, the strings must be fixed according to other benchmarks, and then the height of the panel in the steel mold should be detected based on the strings. The inspection procedure is complicated and time-consuming

[0007] 5) The crown of the steel mold should be considered in the inspection of the stay string, and the crown of each steel mold has a certain difference. According to the uniform standard inspection, the size error is large

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