Steel rail appearance inspection sample plate

Abstract

The utility model relates to the technical field of steel rolling measuring tools, in particular to a steel rail appearance inspection template. A steel rail appearance inspection template comprises a negative inspection template and a positive inspection template. By arranging the negative inspection sample plate and the positive inspection sample plate, whether the relative position between the rail head and the rail web of the asymmetric section steel rail meets the design requirement or not can be quickly and accurately measured and evaluated. The inspection template can be combined with the existing steel rail measurement standard to form a complete detection system, so that the safety and the reliability of the steel rail in the use process are ensured, and higher requirements of users are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of rolling steel measuring tool, concretely relates to a rail profile inspection sample plate. BACKGROUND

[0002] In modern railway construction, the reliability and safety of the track system are of paramount importance. Steel rails, as the core component of the track system, directly affect the running safety and efficiency of trains. Asymmetric section steel rails for turnouts refer to steel rails with asymmetric section shapes used in railway turnouts. The design feature of such steel rails is to adapt to the special needs of the turnout area, such as the change of train turning and wheel-rail contact conditions. Asymmetric section steel rails may have thicker web or different head shapes on one side to provide better support and wear resistance.

[0003] The standard of asymmetric section steel rails for turnouts has undergone several updates. For example, the commonly used TB / T 2344.2—2020 standard in China specifies the type size and limit deviation, technical requirements, etc. of asymmetric section steel rails for railway turnouts. These requirements ensure that the basic size and shape of the steel rail meet the design and use requirements. However, the existing standard, although covering key dimensions such as rail head width, rail head height, rail web thickness, and rail bottom width, does not explicitly specify the relative position of the rail head and the rail web, which may cause some potential problems in actual use.

[0004] For example, if the relative position of the rail head and the rail web does not meet the expected requirements, it may affect the overall strength and stability of the steel rail, and thus affect the safe operation of the train. In addition, this ambiguous provision also brings some difficulties to the production and detection of steel rails, as there is a lack of unified standards to assess whether the relative position between the rail head and the rail web meets the requirements.

[0005] To solve this problem, the existing technology needs to be further improved and perfected. Specifically, a new detection method or tool needs to be developed that can quickly and accurately measure and evaluate the relative position between the rail head and the rail web of asymmetric section steel rails (such as 60TY1 steel rails) whether it meets the design requirements. Especially the relative position of the rail head working edge (i.e. the narrower side of the rail head in asymmetric section steel rails for turnouts) and the rail web. This method or tool should be able to combine with the existing TB / T2344.2-2020 standard to form a complete detection system to ensure the safety and reliability of 60TY1 steel rails in use, meeting the higher requirements of users.

[0006] In summary, although the existing TB / T2344.2-2020 standard has specified the main size of the asymmetric section rail for turnout, there is still a deficiency in the requirement for the relative position between the rail head and the rail waist. Therefore, it is necessary to develop a new solution to make up for this deficiency of the existing standard and improve the overall quality and performance of the asymmetric section rail for turnout. Utility model content

[0007] Therefore, the utility model provides an asymmetric section rail appearance inspection sample, which can at least solve the technical problem that the existing inspection sample cannot accurately measure and evaluate whether the relative position between the rail head and the rail waist of the asymmetric section rail meets the design requirement.

[0008] The utility model discloses a rail appearance inspection sample, which comprises a negative inspection sample and a positive inspection sample.

[0009] The negative inspection sample comprises a first positioning section, a second positioning section, a first detection section and a first connecting section. The first positioning section is provided with a first detection surface for abutting against one side of the rail waist of the rail. The second positioning section is provided with a second detection surface for abutting against the upper top surface of the rail head of the rail. The first detection section is provided with a first measurement protrusion facing one side of the rail head. The first connecting section is used for connecting the first positioning section, the second positioning section and the first detection section.

[0010] The positive inspection sample comprises a third positioning section, a fourth positioning section, a second detection section and a second connecting section. The third positioning section is provided with a third detection surface for abutting against one side of the rail waist of the rail. The fourth positioning section is provided with a fourth detection surface for abutting against the upper top surface of the rail head of the rail. The second detection section is provided with a second measurement protrusion facing one side of the rail head. The second connecting section is used for connecting the third positioning section, the fourth positioning section and the second detection section.

[0011] In the negative inspection sample, the distance from the first measurement protrusion to the vertical plane where the first detection surface is located is less than the distance from the second measurement protrusion to the vertical plane where the third detection surface is located in the positive inspection sample.

[0012] In some embodiments, the first measurement protrusion and the second measurement protrusion both face the side corresponding to the working side of the rail head.

[0013] In some embodiments, the first detection surface and the third detection surface are both vertical planes, and the second detection surface and the fourth detection surface are both horizontal planes.

[0014] In some embodiments, the first detection surface and the third detection surface are arranged corresponding to the rail waist on the non-working side.

[0015] In some embodiments, the first positioning section and the third positioning section are horizontally arranged along a direction perpendicular to the rail waist, the second positioning section and the fourth positioning section are arranged along a vertical direction, and the second detection surface and the fourth detection surface are arranged at lower ends of the second positioning section and the fourth positioning section respectively; the first detection section and the second detection section are vertically arranged, and the first measurement protrusion and the second measurement protrusion are arranged at lower ends of one side of the first detection section and the second detection section respectively.

[0016] In some embodiments, the first connecting section comprises a vertical section connected to one end of the first positioning section and a horizontal section connected to upper ends of the second positioning section and the first detection section; and the second connecting section comprises a vertical section connected to one end of the third positioning section and a horizontal section connected to upper ends of the fourth positioning section and the second detection section.

[0017] In some embodiments, the first positioning section, the second positioning section, the first detection section and the first connecting section are integrally formed; and the third positioning section, the fourth positioning section, the second detection section and the second connecting section are integrally formed.

[0018] In some embodiments, the first measurement protrusion and the second measurement protrusion are hemispherical protrusions.

[0019] In some embodiments, the first connecting section and the second connecting section are each provided with a holding handle.

[0020] In some embodiments, the negative inspection sample plate and / or the positive inspection sample plate are provided with distinguishing marks.

[0021] The present application has the following beneficial effects: the negative inspection sample plate and the positive inspection sample plate provided by the present application can quickly and accurately measure and evaluate whether the relative position between the rail head and the rail waist of the asymmetric cross-section rail meets the design requirements. The inspection sample plate can be combined with the existing rail detection standard to form a complete detection system, so as to ensure the safety and reliability of the asymmetric cross-section rail in use and meet the higher requirements of users.

[0022] Specifically, when the relative position between the rail head and the rail waist of the rail is inspected by using the negative inspection sample plate, if the first detection surface abuts against one side of the rail waist, the second detection surface abuts against the upper top surface of the rail head, and the first measurement protrusion is in close contact with one side of the rail head, the negative inspection sample plate is qualified. If the first detection surface abuts against one side of the rail waist, the second detection surface abuts against the upper top surface of the rail head, and the first measurement protrusion has a gap with one side of the rail head, the rail is unqualified.

[0023] When the relative position of the rail head and the rail waist of the steel rail is checked by using the positive checking sample, if the third detection surface is in abutment with one side of the rail waist, the fourth detection surface is in abutment with the upper top surface of the rail head, and the second measurement protrusion is in abutment with the rail head with a gap, it is considered that the positive checking sample is qualified. If the third detection surface is in abutment with one side of the rail waist, the fourth detection surface is in abutment with the upper top surface of the rail head, and the second measurement protrusion is in contact with one side of the rail head, the steel rail is unqualified.

[0024] Only when the checking results of the negative checking sample and the positive checking sample are both qualified, the cross section of the steel rail is determined to be qualified. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other embodiments can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0026] Figure 1 The structural schematic diagram of the negative checking sample provided by one embodiment of the present application is shown in the figure.

[0027] Figure 2 The structural schematic diagram of the positive checking sample provided by one embodiment of the present application is shown in the figure.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1. Negative checking sample; 101. First positioning section; 102. Second positioning section; 103. First detection section; 104. First connecting section; 105. First measurement protrusion;

[0030] 2. Negative checking sample; 201. Third positioning section; 202. Fourth positioning section; 203. Second detection section; 204. Second connecting section; 205. Second measurement protrusion;

[0031] 3. Steel rail; 301. Rail head; 302. Rail waist. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application are further described in detail below, and the drawings are referred to.

[0033] It should be noted that the orientation words such as "upper", "lower", "left", "right" used in the embodiments of the utility model are generally directed to the directions shown in the drawings. Similarly, all the expressions of "first", "second" and "third" and the like used in the embodiments of the utility model are used only for distinguishing two same-named non-identical entities or non-identical parameters, and it can be seen that "first", "second" and "third" and the like are only for the convenience of description, and should not be understood as the limitation of the embodiments of the utility model, and the subsequent embodiments will not be described one by one.

[0034] The utility model discloses a kind of steel rail profile inspection sample plate, as shown in Figure 1 And Figure 2 It includes: negative inspection sample plate 1 and positive inspection sample plate 2.

[0035] Among them Figure 1 It is negative inspection sample plate 1, and it includes first positioning section 101, second positioning section 102, first detection section 103 and first connecting section 104.First positioning section 101 is provided with the first detection surface for abutting with the rail waist 302 side of rail 3, second positioning section 102 is provided with the second detection surface for abutting with the top surface of rail head 301 of rail 3, and first detection section 103 is provided with the first measurement protrusion 105 towards the side of rail head 301.First connecting section 104 is used to connect first positioning section 101, second positioning section 102 and first detection section 103.

[0036] Figure 2 It is positive inspection sample plate 2, and it includes third positioning section 201, fourth positioning section 202, second detection section 203 and second connecting section 204;Third positioning section 201 is provided with the third detection surface for abutting with the rail waist 302 side of rail 3, fourth positioning section 202 is provided with the fourth detection surface for abutting with the top surface of rail head 301 of rail 3, and second detection section 203 is provided with the second measurement protrusion 205 towards the side of rail head 301.Second connecting section 204 is used to connect third positioning section 201, fourth positioning section 202 and second detection section 203.

[0037] Among them, the distance from first measurement protrusion 105 in negative inspection sample plate 1 to the vertical plane where first detection surface is located is less than the distance from second measurement protrusion 205 in positive inspection sample plate 2 to the vertical plane where third detection surface is located.

[0038] Specifically, as shown in Figure 1As shown in the figure, surface AB is the first inspection surface of negative inspection template 1, surface CD is the second inspection surface, and position E is the first measuring protrusion 105. When using negative inspection template 1 to check the relative position of rail head 301 and rail web 302 of rail 3, if surface AB abuts against one side of rail web 302, surface CD abuts against the top surface of rail head 301, and point E is in close contact with one side of rail head 301, then negative inspection template 1 is qualified. If surface AB abuts against one side of rail web 302, surface CD abuts against the top surface of rail head 301, and point E has a gap with one side of rail head 301, then rail 3 is unqualified.

[0039] like Figure 2 As shown in the figure, surface FG is the third inspection surface of the positive inspection template 2, surface HI is the fourth inspection surface, and position J is the second measuring protrusion 205. When using the positive inspection template 2 to check the relative position of the rail head 301 and rail web 302 of the rail 3, if surface FG abuts against one side of the rail web 302, surface HI abuts against the top surface of the rail head 301, and point J has a gap with the rail head 301, then the positive inspection template 2 is qualified. If surface FG abuts against one side of the rail web 302, surface HI abuts against the top surface of the rail head 301, and point J contacts one side of the rail head 301, then the rail 3 is unqualified.

[0040] Only when both the negative inspection template 1 and the positive inspection template 2 are found to be qualified can the section of rail 3 be determined to be qualified.

[0041] The difference between the distance between point J and the vertical plane containing plane FG and the distance between point E and the vertical plane containing plane AB is defined as n, where n = the absolute value of the maximum allowable negative deviation + the absolute value of the maximum allowable positive deviation.

[0042] Taking 60TY1 rail 3 as an example, the horizontal distance between the side of the working side rail head 301 and the side of the non-working side rail web 302 is 45.5mm. If the acceptable deviation of the relative position of the rail head 301 and the rail web 302 of rail 3 is ±1mm, then the maximum allowable positive deviation is +1mm and the maximum allowable negative deviation is -1mm, and n is 2mm.

[0043] This application, through the aforementioned negative inspection template 1 and positive inspection template 2, enables rapid and accurate measurement and evaluation of whether the relative position between the rail head 301 and rail web 302 of the asymmetric section rail 3 meets design requirements. This inspection template can be combined with the existing TB / T2344.2-2020 testing standard to form a complete testing system, ensuring the safety and reliability of the asymmetric section rail 3 during use and meeting higher user requirements.

[0044] In some embodiments, the first measurement protrusion 105 and the second measurement protrusion 205 are both arranged towards the side surface corresponding to the working side of the rail head 301. Since the working side of the rail head 301 is the part of the rail 3 directly contacted by the train wheels, its shape and size are crucial to the safety and stability of the train operation. Therefore, ensuring that the size and shape of the working side of the rail head 301 meet the standard requirements is the focus of the rail 3 detection. Arranging the first measurement protrusion 105 and the second measurement protrusion 205 towards the working side of the rail head 301 can more directly and accurately detect the size and shape of this part. At the same time, by comparing with the detection surfaces on the negative check template 1 and the positive check template 2, it can be quickly judged whether the working side of the rail head 301 meets the design requirements.

[0045] In some embodiments, the first detection surface and the third detection surface are both vertical surfaces, ensuring that they can closely fit the rail waist 302, improving the measurement accuracy and stability. The second detection surface and the fourth detection surface are both horizontal surfaces. They can ensure close contact with the upper top of the rail head 301 of the rail 3, ensuring the accuracy of the measurement results.

[0046] In some embodiments, the first detection surface and the third detection surface are arranged corresponding to the rail waist 302 of the non-working side. So that they can be quickly matched with the first measurement protrusion 105 and the second measurement protrusion 205 respectively to realize positioning.

[0047] In some embodiments, the first positioning section 101 and the third positioning section 201 are both arranged horizontally along the direction perpendicular to the rail waist 302, and the second positioning section 102 and the fourth positioning section 202 are arranged along the vertical direction. The second detection surface and the fourth detection surface are arranged at the lower end of the second positioning section 102 and the fourth positioning section 202 respectively. The first detection section 103 and the second detection section 203 are arranged vertically, and the first measurement protrusion 105 and the second measurement protrusion 205 are arranged at the lower end of one side of the first detection section 103 and the second detection section 203 respectively. This facilitates the operator to accurately determine the positioning position of the rail 3 by observing the entire negative check template 1 or positive check template 2, improving the detection efficiency.

[0048] In some embodiments, the first connecting section 104 includes a vertical section connected to one end of the first positioning section 101 and a horizontal section connected to the upper end of the second positioning section 102 and the upper end of the first detection section 103; the second connecting section 204 includes a vertical section connected to one end of the third positioning section 201 and a horizontal section connected to the upper end of the fourth positioning section 202 and the upper end of the second detection section 203. By arranging the first connecting section 104 and the second connecting section 204 with horizontal structure and vertical structure, the operator can quickly adjust the detection position of the negative check template 1 or the positive check template 2 through visual judgment.

[0049] In some embodiments, the first positioning section 101, the second positioning section 102, the first detection section 103 and the first connecting section 104 are integrally formed. The third positioning section 201, the fourth positioning section 202, the second detection section 203 and the second connecting section 204 are integrally formed. The processing difficulty of the inspection template is reduced, and the detection accuracy of the inspection template is improved. Preferably, the positive inspection template 2 and the negative inspection template 1 are made of stainless steel. The use of stainless steel can avoid surface rusting during use, causing inaccurate positioning and affecting inspection accuracy. At the same time, the stainless steel material can improve the service life of the positive inspection template 2 and the negative inspection template 1.

[0050] In some embodiments, the first measurement protrusion 105 and the second measurement protrusion 205 are hemispherical protrusions. The hemispherical end face allows the first measurement protrusion 105 and / or the second measurement protrusion 205 to point contact the rail head 301 of the measured steel rail 3, so that the measurement result is more accurate.

[0051] In some embodiments, the first connecting section 104 and the second connecting section 204 are each provided with a holding handle (not shown in the figure). For example, the holding handle is a rubber handle fixedly sleeved on the vertical section of the first connecting section 104 and the second connecting section 204, and the rubber handle is circumferentially provided with protruding lines for increasing static friction. It is convenient for the operator to hold.

[0052] In some embodiments, the negative inspection template 1 and / or the positive inspection template 2 are provided with distinguishing marks. For example, the negative inspection template 1 is provided with a "-" symbol, and the positive inspection template 2 is provided with a "+" symbol, etc., so that the operator can more easily distinguish the positive inspection template 2 and the negative inspection template 1.

[0053] The technical features of the above embodiments can be combined in any way. In order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0054] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A rail profile inspection template, characterised in that, The utility model relates to a rail inspection sample plate, including: A negative inspection sample plate (1) and a positive inspection sample plate (2); The negative inspection sample plate (1) includes a first positioning section (101), a second positioning section (102), a first detection section (103) and a first connecting section (104), a first detection surface for abutting with the one side of rail waist (302) of the rail (3) is arranged on the first positioning section (101), a second detection surface for abutting with the top surface of rail head (301) of the rail (3) is arranged on the second positioning section (102), a first measurement protrusion (105) towards the one side of rail head (301) is arranged on the first detection section (103), the first connecting section (104) is used for connecting the first positioning section (101), the second positioning section (102) and the first detection section (103); The positive inspection sample plate (2) includes a third positioning section (201), a fourth positioning section (202), a second detection section (203) and a second connecting section (204), a third detection surface for abutting with the one side of rail waist (302) of the rail (3) is arranged on the third positioning section (201), a fourth detection surface for abutting with the top surface of rail head (301) of the rail (3) is arranged on the fourth positioning section (202), a second measurement protrusion (205) towards the one side of rail head (301) is arranged on the second detection section (203), the second connecting section (204) is used for connecting the third positioning section (201), the fourth positioning section (202) and the second detection section (203); Wherein, the distance from the first measurement protrusion (105) to the vertical plane where the first detection surface is located in the negative inspection sample plate (1) is less than the distance from the second measurement protrusion (205) to the vertical plane where the third detection surface is located in the positive inspection sample plate (2).

2. The rail profile inspection template of claim 1, wherein, The first measurement protrusion (105) and the second measurement protrusion (205) are all towards the side surface corresponding to the working side of rail head (301).

3. The rail profile inspection template of claim 1 wherein, The first detection surface and the third detection surface are both vertical planes, and the second detection surface and the fourth detection surface are both horizontal planes.

4. The rail profile inspection template of claim 1 wherein, The first detection surface and the third detection surface are correspondingly arranged with the rail waist (302) of the non-working side.

5. The rail profile inspection template of claim 3 wherein, The first positioning section (101) and the third positioning section (201) are both horizontally arranged along the direction perpendicular to the rail waist (302), the second positioning section (102) and the fourth positioning section (202) are vertically arranged, the second detection surface and the fourth detection surface are respectively arranged at the lower ends of the second positioning section (102) and the fourth positioning section (202), the first detection section (103) and the second detection section (203) are vertically arranged, and the first measurement protrusion (105) and the second measurement protrusion (205) are respectively arranged at the lower ends of one side of the first detection section (103) and the second detection section (203).

6. The rail profile inspection template of claim 5, wherein, The first connecting section (104) includes a vertical section connected with one end of the first positioning section (101) and a horizontal section connected with the upper end of the second positioning section (102) and the upper end of the first detection section (103). The second connecting section (204) comprises a vertical section connected with one end of the third positioning section (201) and a horizontal section connected with the upper end of the fourth positioning section (202) and the upper end of the second detecting section (203).

7. The rail profile inspection template of claim 1 wherein, The first positioning section (101), the second positioning section (102), the first detecting section (103) and the first connecting section (104) are integrally formed; the third positioning section (201), the fourth positioning section (202), the second detecting section (203) and the second connecting section (204) are integrally formed.

8. The rail profile inspection template of claim 1 wherein, The first measuring protrusion (105) and the second measuring protrusion (205) are semispherical protrusions.

9. The rail profile inspection template of claim 1 wherein, A holding handle is arranged on the first connecting section (104) and the second connecting section (204).

10. The rail profile inspection template of claim 1 wherein, The negative checking sample plate (1) and / or the positive checking sample plate (2) is provided with a distinguishing mark.

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