Steel rail symmetry inspection sample plate

Abstract

The utility model relates to a steel rail symmetry inspection sample plate which comprises a normal sample plate, the normal sample plate comprises a sample plate body, the top of the sample plate body is provided with a rail head measuring protrusion, the middle of the sample plate body is provided with a rail waist reference surface, and the bottom of the sample plate body is provided with a rail foot measuring surface and two rail bottom surface positioning protrusions. During inspection of the normal sample plate, the two rail bottom surface positioning protrusions are tightly attached to the lower surface of the rail bottom of the steel rail, the rail waist reference surface is tightly attached to the rail waist of the steel rail, the rail head measuring protrusion faces the rail head side face of the steel rail, and a first gap exists between the rail head measuring protrusion and the rail head side face of the steel rail. And the negative sample plate has the same structure as the positive sample plate, and when the negative sample plate is inspected, the two rail bottom surface positioning bulges are clung to the lower surface of the rail bottom of the steel rail, a second gap exists between the rail waist reference surface and the rail waist of the steel rail, and the rail head measuring bulge is clung to the side surface of the rail head of the steel rail. According to the utility model, missing detection can be avoided, and the steel rail symmetry inspection precision is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of steel rolling, in particular to the field of measuring tools for steel rolling, and more particularly to a steel rail symmetry inspection template. Background Art

[0002] The symmetry of rail section affects rail welding, and there are clear specified values ​​and inspection templates in national standards. For example, Figure 1 and 2 The positive and negative sample structures of the rail symmetry inspection sample specified in the national standard are shown respectively. Figure 1 As shown, the front template of the rail cross-section symmetry inspection template has a plate-shaped template body 1, which has multiple inspection locations corresponding to the outer surface of the rail 2, such as a rail head measurement protrusion 3 corresponding to the rail head side surface of the rail 2, two rail bottom surface positioning protrusions (a first rail bottom surface positioning protrusion 4 and a second rail bottom surface positioning protrusion 5) corresponding to the lower surface of the rail bottom of the rail 2, and a rail foot measurement surface 6 corresponding to the rail bottom side surface of the rail 2. Figure 2 As shown in FIG, the negative sample of the rail section symmetry inspection sample has a similar structure.

[0003] The rule for judging whether the rail cross section symmetry is qualified by using the positive and negative samples of the above rail cross section symmetry inspection sample is: for the positive sample, if Figure 1 As shown, if the rail head measuring protrusion 3 is in close contact with the rail head side surface of the rail 2, the two rail bottom surface positioning protrusions (the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5) are in close contact with the lower surface of the rail bottom of the rail 2, and there is a gap between the rail foot measuring surface 6 and the rail bottom side surface of the rail 2, then the positive sample inspection is qualified; for the negative sample, such as Figure 2 As shown, if the two rail bottom surface positioning protrusions (the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5) are in close contact with the lower surface of the rail bottom of the rail 2, the rail foot measuring surface 6 is in close contact with the rail bottom side surface of the rail 2, and there is a gap between the rail head measuring protrusion 3 and the rail head side surface of the rail 2, then the negative template inspection is qualified.

[0004] However, when the positive and negative test pieces of the above-mentioned inspection templates are used to inspect the symmetry of the rails, when the center lines of the rail head, rail waist and rail bottom do not coincide, and the center lines of the rail head and rail bottom deviate from the center line of the rail waist by the same value, the cross section is already asymmetrical, which will affect the use of rail welding. However, in this case, the inspection using the positive and negative test pieces is still qualified, and the problem of missed inspection occurs. Figure 3 and 4 The existing symmetry check template shown ( Figure 3 It is a genuine sample, Figure 4 is a negative sample) is shown as a case of missed detection.

[0005] Therefore, the existing technology needs to be improved. It is urgent to provide a rail symmetry inspection template that can avoid the above-mentioned missed inspection situation. Utility Model Content

[0006] The utility model aims to provide a rail symmetry inspection sample with a new structure.

[0007] In order to solve the above technical problems or achieve the above objectives, the present invention adopts the following technical solutions, which are specifically described as follows:

[0008] According to aspects of the present invention, a rail symmetry inspection template is provided, comprising:

[0009] A positive template, which includes a template body, a rail head measuring protrusion is provided on the top of the template body, a rail waist reference surface is provided in the middle of the template body, and a rail foot measuring surface and two rail bottom surface positioning protrusions are provided at the bottom of the template body. When inspecting the positive template, the following conditions must be met: the two rail bottom surface positioning protrusions are in close contact with the lower surface of the rail bottom of the rail, the rail waist reference surface is in close contact with the rail waist of the rail, the rail head measuring protrusion faces the side of the rail head of the rail, and a first gap exists between the rail head measuring protrusion and the side of the rail head of the rail;

[0010] Negative template, the structure of the negative template is the same as the positive template. When checking the negative template, the following conditions must be met: the two rail bottom positioning protrusions are in close contact with the lower surface of the rail bottom of the rail, there is a second gap between the rail waist reference surface and the rail waist, and the rail head measuring protrusion is in close contact with the side of the rail head of the rail.

[0011] In one embodiment of the present invention, in the positive template and the negative template, the end of the rail head measuring protrusion is hemispherical.

[0012] In one embodiment of the present invention, in the positive template and the negative template, the rail web reference surface is a curved surface.

[0013] In one embodiment of the present invention, the radius of the arc surface is equal to the radius of the arc at the rail waist corresponding to the measured rail.

[0014] In one embodiment of the present invention, in the positive template and the negative template, the two rail bottom surface positioning protrusions are spaced apart from each other and have different structures.

[0015] In one embodiment of the present invention, in the positive template and the negative template, one of the rail bottom surface positioning protrusions is a trapezoidal protrusion.

[0016] In one embodiment of the present invention, in the positive template and the negative template, the portions where the two rail bottom surface positioning protrusions are in close contact with the lower surface of the rail bottom of the rail are both straight line segments.

[0017] In one embodiment of the present invention, the lengths of the straight sections of the two rail bottom surface positioning protrusions are the same.

[0018] In one embodiment of the present invention, the lower surface of the rail bottom of the steel rail is symmetrically supported and fitted on the two rail bottom surface positioning protrusions.

[0019] In one embodiment of the present invention, the width of the first gap is equal to the width of the second gap.

[0020] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] The utility model provides a rail symmetry inspection template which can avoid missed inspections and greatly improve the accuracy of rail symmetry inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0023] The above and / or additional aspects and advantages of the present invention will become more apparent and easier to understand in the description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 The figure shows the structure of the positive sample of the rail symmetry inspection sample specified in the national standard;

[0025] Figure 2 The figure shows the structure of the negative sample of the rail symmetry inspection sample specified in the national standard;

[0026] Figure 3 It shows the structural diagram of the positive sample when the existing symmetrical inspection sample is missed;

[0027] Figure 4 The schematic diagram of the structure of the negative sample when the existing symmetrical inspection sample is missed is shown;

[0028] Figure 5 The figure shows the structural schematic diagram of the positive sample of the rail symmetry inspection sample provided by the present invention;

[0029] Figure 6 The utility model shows a schematic structural diagram of the negative template of the rail symmetry inspection template provided by the present invention.

[0030] Reference Signs List

[0031] 1- sample body; 2- rail; 3- rail head measuring protrusion; 4- first rail bottom surface positioning protrusion; 5- second rail bottom surface positioning protrusion; 6- rail foot measuring surface; 7- rail waist reference surface; d1- first gap; d2- second gap. DETAILED DESCRIPTION

[0032] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in the present invention, it is readily apparent to those skilled in the art that various modifications are possible without departing substantially from the teachings of the present invention. Accordingly, all such modifications are intended to be included within the scope of the present invention. Other substitutions, modifications, variations, and deletions may be made to the design, operating conditions, and parameters of the following exemplary embodiments without departing from the spirit of the present invention.

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0034] like Figure 5 and 6 As shown, the utility model provides a rail symmetry inspection template, comprising:

[0035] The positive template includes a template body 1, a rail head measuring protrusion 3 is provided on the top of the template body 1, a rail waist reference surface 7 is provided in the middle of the template body 1, and a rail foot measuring surface 6 and a first rail bottom surface positioning protrusion 4 and a second rail bottom surface positioning protrusion 5 are provided at the bottom of the template body 1. When inspecting the positive template, the following conditions must be met: the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5 are both in close contact with the lower surface of the rail bottom of the rail 2, the rail waist reference surface 7 is in close contact with the waist of the rail 2, the rail head measuring protrusion 3 faces the side of the rail head of the rail 2, and there is a first gap d1 between the rail head measuring protrusion 3 and the side of the rail head of the rail 2;

[0036] Negative template, the structure of the negative template is the same as the positive template. When inspecting the negative template, the following conditions must be met: the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5 are both in close contact with the lower surface of the rail bottom of the rail 2, there is a second gap d2 between the rail waist reference surface 7 and the rail waist of the rail 2, and the rail head measuring protrusion 3 is in close contact with the side of the rail head of the rail 2.

[0037] Through the above technical solution of the present invention, the rail symmetry inspection template provided by the present invention can avoid missed inspections and greatly improve the accuracy of rail symmetry inspection.

[0038] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6As shown, in the positive and negative templates, the end of the rail head measurement protrusion 3 is hemispherical. For example, the end of the rail head measurement protrusion 3 at point G in the figure is hemispherical.

[0039] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, in the positive and negative templates, the rail waist reference surface 7 is a curved surface. For example, the line segment portion EF of the rail waist reference surface 7 is an arc segment.

[0040] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, the radius of the arc surface is equal to the radius of the arc at the rail waist corresponding to the measured rail 2.

[0041] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, in the positive template and the negative template, the two rail bottom surface positioning protrusions (the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5) are spaced apart from each other and have different structures.

[0042] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, in the positive sample and the negative sample, one of the rail bottom surface positioning protrusions (the second rail bottom surface positioning protrusion 5) is a trapezoidal protrusion.

[0043] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, in the positive and negative samples, the portions where the two rail bottom surface positioning protrusions (the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5) are in close contact with the lower surface of the rail bottom of the rail 2 are both straight line segments, that is, the portion where the first rail bottom surface positioning protrusion 4 is in close contact with the lower surface of the rail bottom of the rail 2 is straight line segment AB, and the portion where the second rail bottom surface positioning protrusion 5 is in close contact with the lower surface of the rail bottom of the rail 2 is straight line segment CD.

[0044] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, the lengths of the straight segments of the two rail bottom surface positioning protrusions (the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5) are the same, that is, the length of the straight segment AB is the same as the length of the straight segment CD.

[0045] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, the lower surface of the rail bottom of the rail 2 is symmetrically supported and fitted on two rail bottom surface positioning protrusions (the first rail bottom surface positioning protrusion 4 and the second rail bottom surface positioning protrusion 5).

[0046] In a preferred embodiment of a rail symmetry inspection template provided by the present invention, as Figure 5-6 As shown, the width of the first gap d1 is equal to the width of the second gap d2.

[0047] Specifically, refer again to Figure 5-6 As shown, the rail symmetry inspection template of the present invention uses the rail waist as a reference to detect the deviation of the rail head relative to the rail waist. Figure 5 As shown, when using a positive sample for inspection, the straight line segment AB of the first rail bottom surface positioning protrusion 4 of the sample body 1 located on the lower surface of the rail 2 and the straight line segment CD of the second rail bottom surface positioning protrusion 5 of the sample body 1 located on the lower surface of the rail 2 are both in close contact with the lower surface of the rail bottom, the arc segment EF of the sample body 1 in the middle is in close contact with the rail waist, and the sample point G of the sample body 1 at the top faces the side of the rail head and there is a first gap d1 with the side of the rail head, which means that the inspected rail is qualified. Figure 6 As shown, when a negative template is used for inspection, the straight line segment AB of the first rail bottom surface positioning protrusion 4 of the template body 1 located on the lower surface of the rail bottom of the rail 2 and the straight line segment CD of the second rail bottom surface positioning protrusion 4 of the template body 1 located on the lower surface of the rail bottom of the rail 2 are both in close contact with the lower surface of the rail bottom, and there is a second gap d2 between the arc segment EF in the middle of the template body 1 and the rail waist, and d2=d1, and the template point G at the top of the template body 1 is in close contact with the side of the rail head, that is, the inspected rail is qualified.

[0048] The above inspection template is suitable for the production of 60kg / m rails and NZR50 rails. It can avoid missed inspections and greatly improve the accuracy of rail symmetry inspection.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to the process, method, article or device. In the absence of further limitations, an element defined by the sentence "including a..." does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0050] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A rail symmetry inspection template, characterized in that: include: A positive template, the positive template comprising a template body, a rail head measuring protrusion provided on the top of the template body, a rail waist reference surface provided in the middle of the template body, a rail foot measuring surface and two rail bottom surface positioning protrusions provided at the bottom of the template body, and the positive template must meet the following requirements during inspection: the two rail bottom surface positioning protrusions are in close contact with the lower surface of the rail bottom of the rail, the rail waist reference surface is in close contact with the rail waist of the rail, the rail head measuring protrusion faces the side surface of the rail head of the rail, and a first gap exists between the rail head measuring protrusion and the side surface of the rail head of the rail; Negative template, the negative template has the same structure as the positive template. When inspecting the negative template, the following conditions must be met: the two rail bottom positioning protrusions are in close contact with the lower surface of the rail bottom of the rail, there is a second gap between the rail waist reference surface and the rail waist, and the rail head measuring protrusion is in close contact with the side of the rail head of the rail.

2. The rail symmetry inspection template according to claim 1, characterized in that: In the positive template and the negative template, the end of the rail head measuring protrusion is hemispherical.

3. The rail symmetry inspection template according to claim 1, characterized in that: In the positive template and the negative template, the rail waist reference surface is a curved surface.

4. The rail symmetry inspection template according to claim 3, characterized in that: The radius of the arc surface is equal to the radius of the arc at the rail waist corresponding to the measured rail.

5. The rail symmetry inspection template according to claim 1, characterized in that: In the positive template and the negative template, the two rail bottom surface positioning protrusions are spaced apart from each other and have different structures.

6. The rail symmetry inspection template according to claim 5, characterized in that: In the positive template and the negative template, one of the rail bottom surface positioning protrusions is a trapezoidal protrusion.

7. The rail symmetry inspection template according to claim 6, characterized in that: In the positive template and the negative template, the portions where the two rail bottom surface positioning protrusions are in close contact with the lower surface of the rail bottom of the rail are both straight line segments.

8. The rail symmetry inspection template according to claim 7, characterized in that: The lengths of the straight sections of the positioning protrusions on the bottom surfaces of the two rails are the same.

9. The rail symmetry inspection template according to claim 8, characterized in that: The lower surface of the rail bottom of the steel rail is symmetrically supported and fitted on the two rail bottom surface positioning protrusions.

10. The rail symmetry inspection template according to claim 1, characterized in that: The width of the first gap is equal to the width of the second gap.

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