Method for measuring and evaluating durability of plateau fixed frog

Abstract

The invention discloses a method for measuring and evaluating durability of a plateau fixed frog. The method comprises the following steps: S1, determining the position of a theoretical tip of the frog; s2, according to the type of the frog and related drawings, the throat of the frog and the position of each related section are determined; s3, determining the positions of the throat, the 20mm section width, the 25mm section width, the 30mm section width, the 35mm section width, the 40mm section width, the 45mm section width and the 50mm section width by taking the theoretical tip as a standard point, and marking to facilitate subsequent repeated measurement; s4, assembling a contour measuring instrument, sequentially swinging the contour measuring instrument to positions corresponding to the throat and each related section, and measuring the contours of the wing rail and the point rail of the frog through the contour measuring instrument; according to the method, the durability of the frog can be measured, the service state of the frog is judged, and the use requirements can be well met.

Description

Technical Field

[0001] The present invention relates to the technical field of frog durability detection, and specifically to a method for measuring and evaluating the durability of a plateau fixed frog. Background Technique

[0002] Plateau railway turnouts have special line conditions such as high altitude and large temperature difference, as well as operation characteristics of high speed and mixed passenger and freight transportation, which put higher requirements on the comprehensive performance of frogs, such as low-temperature toughness, wear resistance, corrosion resistance, and anti-contact fatigue. There are many frog rail parts, and the operating states of each part will affect the force on the wheel flange tread of the frog. Moreover, there is a harmful space in the frog. During the process of the wheel transitioning from the wing rail to the stock rail or from the stock rail to the wing rail, there is a dynamic interaction between the wheel and the rail. When abrasion, deformation or defects occur on the frog surface, the force state of the frog is more complex.

[0003] At present, there is no formed evaluation system for the service state of frogs, and it is impossible to evaluate the service state of frogs. Therefore, it is necessary to establish a complete frog evaluation system to measure the experimental frogs and judge the quality of their service conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for measuring and evaluating the durability of a plateau fixed frog to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A method for measuring and evaluating the durability of a plateau fixed frog includes the following steps:

[0007] S1. Confirm the position of the theoretical tip of the frog;

[0008] S2. According to the type of the frog and relevant drawings, confirm the positions of the throat and each relevant section of the frog;

[0009] S3. Taking the theoretical tip as the standard point, confirm the positions of the throat, 20mm section width, 25mm section width, 30mm section width, 35mm section width, 40mm section width, 45mm section width, and 50mm section width, and make marks for convenient subsequent repeated measurement;

[0010] S4. Assemble the profile measuring instrument, place the profile measuring instrument in turn at the positions corresponding to the throat and each relevant section, and measure the profiles of the wing rail and stock rail of the frog through the profile measuring instrument;

[0011] S5. Compare the profile diagrams measured each time with the initial profile to determine the wear condition at each measurement position, and count the wear values each time;

[0012] S6. Measure the vertical wear values of the switch rail and the wing rail respectively at the position of 30 mm cross-sectional width, and calculate the vertical wear index according to the maximum wear value of the switch rail and the wing rail.

[0013] S7. Measure the maximum wear value on the side of the wing rail within the range of 20 - 50 mm cross-sectional width of the switch rail, and calculate the side wear index of the wing rail according to the maximum wear value on the side of the wing rail.

[0014] S8. Assign weights to the vertical wear index and the side wear index of the wing rail, and calculate the durability index.

[0015] As a preferred solution, the specific measurement process of step S4 is as follows: After the frog is constructed, it needs to be measured once. The profile measured for the first time is defined as the initial profile. After the construction is completed, it is measured once every three months until the frog is scrapped.

[0016] As a preferred solution, in step S3, specifically make marks on the corresponding position of the frog with a stone pen.

[0017] As a preferred solution, the calculation formula for the vertical wear index C5 in step S6 is:

[0018] C5 = 100(1 - D5 / 6);

[0019] Wherein, D5 is the maximum wear value of the switch rail (1) and the wing rail (2) at the position of 30 mm cross-sectional width of the switch rail.

[0020] As a preferred solution, the calculation formula for the side wear index C6 of the wing rail (2) in step S7 is:

[0021] C6 = 100(1 - D6 / 8);

[0022] Wherein, D6 is the maximum wear value on the side of the wing rail (2) within the range of 20 - 50 mm cross-sectional width of the switch rail.

[0023] As a preferred solution, the calculation formula for the durability index B2 in step S8 is:

[0024] B2 = 0.7C5 + 0.3C6.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: Measure the maximum wear value of the switch rail and the wing rail at the position of 30 mm cross-sectional width of the switch rail, calculate the vertical wear index, then measure the maximum wear value on the side of the wing rail within the range of 20 - 50 mm cross-sectional width of the switch rail, and calculate the side wear index of the wing rail. Finally, calculate the durability index, and then the durability of the frog can be judged, so as to judge the service state of the frog, and it can better meet the use requirements. The present invention can realize the measurement of the durability of the frog, judge the service state of the frog, and can well meet the use requirements. Description of the Drawings

[0026] Figure 1 It is a top view observed during the durability measurement of a plateau fixed frog.

[0027] Figure 2 It is a schematic diagram of the cross-sectional profile currently observed of the plateau fixed frog in the method of the present invention.

[0028] In the figure: 1, the switch rail; 2, the wing rail; 3, the throat; 4, the theoretical tip; A, the cross-sectional width of 20 mm; B, the cross-sectional width of 25 mm; C, the cross-sectional width of 30 mm; D, the cross-sectional width of 35 mm; E, the cross-sectional width of 40 mm; F, the cross-sectional width of 45 mm; G, the cross-sectional width of 50 mm. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment: Please refer to Figure 1-2 , a method for measuring and evaluating the durability of a plateau fixed frog, including the following steps:

[0031] S1. Confirm the position of the theoretical tip 4 of the frog;

[0032] S2. According to the type of the frog and the relevant drawings, confirm the positions of the throat of the frog and each relevant cross-section;

[0033] S3. Using a tape measure, with the theoretical tip 4 as the standard point, confirm the positions of the throat 3, the cross-sectional width of 20 mm, the cross-sectional width of 25 mm, the cross-sectional width of 30 mm, the cross-sectional width of 35 mm, the cross-sectional width of 40 mm, the cross-sectional width of 45 mm, and the cross-sectional width of 50 mm, and make marks at the corresponding positions of the frog with a stone pen for convenient subsequent measurement;

[0034] S4. Assemble the profile measuring instrument, place the profile measuring instrument in turn at the positions corresponding to the throat and each relevant cross-section, and measure the profiles of the wing rail 2 and the switch rail 1 of the frog through the profile measuring instrument; specifically, the frog needs to be measured once after construction is completed. The profile measured for the first time is defined as the initial profile. After construction is completed, it is measured once every three months until the frog is scrapped;

[0035] S5. Compare the profile diagrams measured each time with the initial profile to determine the wear condition at each measurement position and count the wear values each time;

[0036] S6. Calculate the vertical wear index C5; specifically, measure the vertical wear value of the switch rail and the vertical wear value of the wing rail at the 30-mm cross-sectional width position respectively, take the maximum wear value D5 of the switch rail and the wing rail, and score the vertical wear index C5. The calculation formula is as follows:

[0037] C5 = 100(1 - D5 / 6);

[0038] Wherein, D5 is the maximum wear value of the switch rail 1 and the wing rail 2 at the 30-mm cross-sectional width position; the vertical wear limit values of the switch rail of the fixed frog and the wing rail are shown in Table 1 specifically.

[0039] Table 1: Vertical wear limit values of the switch rail of the fixed frog and the wing rail

[0040] Damage level Main line turnout, v>120km / h Minor injury 4 Serious injury 6

[0041] S7. Calculate the side wear index C6 of the wing rail 2; specifically, the position of the wing rail corresponding to the switch rail top width of 20 - 50 mm is the area where the measured side wear of the wing rail is relatively serious. Measure the maximum side wear value D6 of the wing rail within this range, and score the side wear index C6 of the wing rail. The calculation formula is as follows:

[0042] C6 = 100(1 - D6 / 8);

[0043] Wherein, D6 is the maximum side wear value of the wing rail 2 within the 20 - 50-mm cross-sectional width range of the switch rail; the side wear limit values of the wing rail are shown in Table 2 specifically.

[0044] Table 2: Side wear limit values of the wing rail of the fixed frog

[0045] Damage level Main line turnout Minor injury 6 Serious injury 8

[0046] S8. Calculate the durability index B2; specifically, perform weight distribution on the vertical wear index C5 and the side wear index C6 of the wing rail. The calculation formula is as follows:

[0047] B2 = 0.7C5 + 0.3C6. The larger the durability index (B2) is, the worse the durability is, and the more serious the overall wear of the frog is.

[0048] The specific weights and coefficients are shown in the durability index weight distribution table in Table 3 below.

[0049] Table 3: Durability index weight distribution table

[0050] <![CDATA[Vertical wear C5]]> <![CDATA[Side wear of wing rail C6]]> Weight coefficient 0.7 0.3

[0051] Working principle of the present invention: During measurement, first confirm the position of the theoretical tip 4 of the frog (the tip mark will be made on the frog itself). Subsequently, taking the theoretical tip 4 as the reference point, confirm the positions of the throat 3, 25mm cross-sectional width, 30mm cross-sectional width, 35mm cross-sectional width, 40mm cross-sectional width, 45mm cross-sectional width, and 50mm cross-sectional width. Then, measure the switch rail 1 and wing rail 2 with a profile measuring instrument to determine the wear value at each position. Immediately afterwards, substitute the maximum wear value of the switch rail 1 and wing rail 2 at the 30mm cross-sectional width of the switch rail into the formula C5 = 100(1 - D5 / 6) to calculate the vertical wear index. Immediately afterwards, substitute the maximum wear value of the wing rail 2 in the range of 20 - 50mm cross-sectional width of the switch rail into the formula C6 = 100(1 - D6 / 8) to calculate the side wear index of the wing rail 2. Finally, substitute the vertical wear index C5 and the side wear index C6 into the formula B2 = 0.7C5 + 0.3C6 to calculate the durability index B2. The larger the value of B2, the worse the durability of the frog and the more serious the overall wear of the frog.

[0052] Figure 2 The figure shows the comparison of the frog profile diagrams of two measurements. Through the comparison, the wear condition of the frog during this measurement period is clearly shown, and the maximum wear amount in this position area is judged. Among them, the red line represents the initial profile line type of the left side of the wing rail, the orange line represents the initial profile line type of the switch rail, the yellow line represents the initial profile line type of the right side of the wing rail, the black line represents the profile line type of the right side of the wing rail measured this time, the light blue line represents the profile line type of the switch rail measured this time, and the dark blue line represents the profile line type of the right side of the wing rail measured this time. Through the comparison between the profile line type measured this time and the initial profile line type, the gap between the two profile line types represents the wear condition of the frog during this period.

[0053] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. They are only relationship words determined for the convenience of describing the structural relationship of each component or element of the present invention, and do not specifically refer to any component or element in the present invention. It should not be construed as a limitation to the present invention.

Claims

1. A durability measurement and evaluation method for a plateau fixed frog, characterized in that It includes the following steps: S1. Confirm the position of the theoretical tip (4) of the frog. S2. According to the type of the frog and relevant drawings, confirm the positions of the frog throat and each relevant section. S3. Taking the theoretical tip (4) as the standard point, confirm the positions of the throat (3), the widths of the 20mm section, 25mm section, 30mm section, 35mm section, 40mm section, 45mm section, and 50mm section, and make marks for convenient subsequent repeated measurements. S4. Assemble the profile measuring instrument, place the profile measuring instrument in turn at the positions corresponding to the throat and each relevant section, and measure the profiles of the wing rail (2) and the switch rail (1) of the frog through the profile measuring instrument. S5. Compare the profile diagram measured each time with the initial profile to determine the wear condition at each measurement position, and count the wear value each time. S6. Measure the vertical wear values of the switch rail and the wing rail at the 30mm section width position respectively, and calculate the vertical wear index according to the maximum wear values of the switch rail and the wing rail. S7. Measure the maximum wear value on the side of the wing rail (2) within the 20 - 50mm section width range of the switch rail, and calculate the side wear index of the wing rail (2) according to the maximum wear value on the side of the wing rail (2). S8. Assign weights to the vertical wear index and the side wear index of the wing rail, and calculate the durability index.

2. The durability measurement and evaluation method of a plateau fixed frog according to claim 1, characterized in that: The specific measurement process of step S4 is as follows: The frog needs to be measured once after construction is completed. The profile measured for the first time is defined as the initial profile. After construction is completed, it is measured once every three months until the frog is scrapped.

3. The durability measurement and evaluation method of a plateau fixed frog according to claim 1, characterized in that: In step S3, specifically make marks on the corresponding position of the frog with a stone pen.

4. A durability measurement and evaluation method for a plateau fixed frog according to claim 1, characterized in that: The calculation formula for the vertical wear index C5 in step S6 is: C5 = 100(1 - D5 / 6); where D5 is the maximum wear value of the switch rail (1) and the wing rail (2) at the 30mm section width position of the switch rail.

5. A durability measurement and evaluation method for a plateau fixed frog according to claim 1, characterized in that: The calculation formula for the side wear index C6 of the wing rail (2) in step S7 is: C6 = 100(1 - D6 / 8); where D6 is the maximum wear value on the side of the wing rail (2) within the 20 - 50mm section width range of the switch rail.

6. The durability measurement and evaluation method of a plateau fixed frog according to claim 1, wherein: The calculation formula for the durability index B2 in step S8 is: B2 = 0.7C5 + 0.3C6.

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