JPH0136082Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a measuring tool for visual inspection of catalysts and the like.

The two types of catalysts currently in use are 90φ and 105.7φ. The visual inspection of these catalysts was carried out by measuring in one direction using a caliper or the like, but this method had the drawback of requiring considerable effort and time.

An object of the present invention is to provide a measuring tool for inspecting edges of cylindrical objects, which eliminates the above-mentioned drawbacks and allows easy determination of whether or not the object is within specifications.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Figure 1, which shows an example of a chipped edge catalyst, c is the set value for the length of the chipped axial direction, d is the set depth from the outer circumference at the end face, a is the set value for the maximum chipped edge depth at the end face, and b is the set value for the chipped edge depth at the end face. When the set value of the notched edge arc length is set at the set depth d, the adoption is determined as follows.

(1) Items with a chipped edge length in the axial direction that is longer than the set value c will be rejected.

(2) Items that meet item (1) and have an edge chipping depth that is smaller than the set depth d from the outer periphery at the end face are deemed to have passed.

(3) If item (1) is passed and the edge chipping depth is greater than the set depth d, the chipping depth at the end face and the arc length are smaller than the set values a and b, respectively. do.

The measuring tool for inspecting edge chipping 1 of the present invention allows the above-mentioned inspection to be easily accomplished in a short period of time. The measuring tool consists of a transparent square-shaped top plate 2 and a rectangular side plate 3, as shown in Fig. 3 is inserted into the top plate 2 and fixed at right angles, and as shown in Fig. 3, a first limit line 4 and a millimeter scale are engraved on the side plate 3 at the position of the set value c downward from the bottom surface of the top plate 2. It is rare. As shown in FIG. 4, the top plate 2 has a circular catalyst outer circumferential line 5 inscribed with the side plate 3 at point A, and a line D ₂ located at a position d inward of the circular catalyst outer circumferential line 5.
An arc is carved on circle 6. In addition, the distance from the point A is the edge chipping depth specified value a, and the second limit line 8 perpendicular to the radius line 7 passing through the point A, and the millimeter scale on that radius line and the radius passing through the point A on the _D2 circle 6. line 7
Third and fourth limit lines 9, which are perpendicular to the arc at both ends of the arc and whose total length is the specified value b, are distributed on both sides of the arc.
10 and a millimeter scale is carved on this arc.

Next, the operation of the above embodiment will be explained.

(1) First, as shown in Fig. 2, the lower surface of the upper plate 2 of the measuring tool is in contact with the end face of the catalyst where the chipped edge 1 is present, and the D ₁ circle on the upper plate 2 overlaps the outer circumferential line of the catalyst. Further, the side plate 3 is installed so that the notched edge portion 1 is in internal contact with the catalyst.

(2) In Fig. 3, if the edge notch axis length is longer than the set value c according to the first limit line 4 of the side plate 3, it will be rejected.

(3) Passes item 2, and in Fig. 4, the edge chipping depth is the set depth d inward from the outer circumferential line 5 at the end surface.
If it is smaller, that is, if the edge chip is shallow and exists only on the outside (right side) of _D2 circle 6, it will be accepted.

(4) If item 2 is passed, and the edge chipping in Figure 1 is deep and larger than the set depth d, the edge chipping depth at the end face and the set arc length are smaller than the set values a and b, respectively. In Fig. 4, if the edge chipping has penetrated into the inside of the _D2 circle 6, the edge chipping depth will not be on the left side of the second limit line 8, and the arc length on the edge chipping circle 6 will be the third. Those that fall within the fourth limit lines 9 and 10 and do not protrude are deemed to have passed.

Note that although the above embodiments have explained the chipping at the edge of the catalyst, the use of this measuring tool is not limited to catalysts, but can also be applied to inspecting chipping at the edges of other cylindrical objects. Further, the top plate is not limited to a square shape and the side plates are not limited to a rectangular shape, but plates of other shapes can also be realized.

As mentioned above, the measuring device of the present invention consists of a transparent plate fixed at right angles, and it can be used to measure the axial length of the edge of a cylindrical object such as a catalyst, the maximum edge depth from the outer periphery at the end, and the settings at the end. Provided is a measuring tool for edge chipping inspection of a cylindrical object that allows easy determination of whether the edge chipping is within the standard because four limit lines such as the edge chipping arc length at depth d are drawn. can.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a catalyst with a chipped edge, Figure 2 is a perspective view of the measuring device of the present invention attached to the catalyst with a chipped edge, Figure 3 is a view taken in the direction of the X arrow in Figure 2, and Figure 4 is a view of the chipped catalyst. FIG. 2 is a view taken along the Y arrow. 2... Top plate, 3... Side plate, 4... First limit line, 5... D ₁ yen, 6... D ₂ yen, 7... Radius line,
8...Second limit line, 9...Third limit line, 10...
4th limit line.

Claims (1)

[Scope of utility model registration request] A transparent top plate and a side plate are fixed at right angles, and a first limit line is carved on the side plate at a position of a set value c downward with the lower surface of the top plate as a reference, and a first limit line is carved on the side plate at a position of a set value c.
A circle D ₁ having the same diameter as the cylindrical object to be inspected and inscribed at a point,
A circle D2 is concentric with this circle _D1 and has a smaller diameter by a set value _2d , a second limit line that is perpendicular to the radius line passing through the point A at a distance a set value from the point A, and a second limit line on both sides of the radius line. The total length provided on the distribution circle D ₂ is the set value b
A measuring tool for inspecting edge chipping of a cylindrical object, which has third and fourth limit lines perpendicular to the arc cut at both ends of the arc.