Inspection instrument for pressure vessel ellipsoidal head based on ellipsograph

Abstract

The invention relates to an inspection instrument for a pressure vessel ellipsoidal head based on an ellipsograph, and belongs to the field of pressure vessel inspection equipment. The instrument mainly comprises an ellipsograph slide rail with a sliding groove. Two ends of the ellipsograph slide rail are provided with fixing clips and fastening bolts installed in a matched manner. The ellipsograph slide rail is provided with a slide bar through a center vertical sliding block and an eccentric horizontal slide block. The eccentric end of the slide bar is a push rod with a high-precision displacement sensor. The tail end of the push rod is provided with a high-precision displacement sensor roller. The high-precision displacement sensor is connected with a handheld terminal through a data cable. Beneficial effects of the instrument are that ellipsoidal head inspection precision and inspection efficiency are improved, quality of the pressure vessel ellipsoidal head is effectively ensured, manufacturing and maintenance steps of a sample plate are not needed, and situation of being lack of automation inspection equipment all the time in an ellipsoidal head inspection industry is improved.

Description

technical field [0001] The invention relates to an inspection instrument that can be applied to inspect whether the ellipticity of the inner surface of the pressure vessel elliptical head conforms to the inspection standard, in particular to an ellipse gauge-based inspection instrument for the pressure vessel elliptical head, which belongs to the pressure vessel inspection equipment field. Background technique [0002] At present, in the latest GB / T 25198-2010 "Pressure Vessel Heads", regarding the "manufacturing, inspection and pre-acceptance" of elliptical heads, the method of sample comparison has been used to judge whether the inner surface of elliptical heads is Conforms to the curvature of a standard ellipse. The standard stipulates that: the convex head formed by the whole board and formed after the panel is assembled, after forming, it is indented to a certain size according to the standard section shape line of the head (depending on the size of the head, it is app...

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Problems solved by technology

[0003] Although the sample comparison is simple and easy to use, the tolerance calculation is not only a heavy workload and very cumbersome for the inspectors, but also manual collection is prone to errors; at the same time, it is also necessary to consider that oval heads of different specifications need to be equipped with a set of matching specifications The model, which increases the cost of the enterprise for the preservation and maintenance of the model; in addition, with the continuous extension of the use of the model, the problem of wear and tear of the elliptical head model

As long as there is a little negligence in the above problems, it will lead to the dangerous use of the oval head, and even cause immeasurable losses to the users of the formed pressure vessels.

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