Inspection ruler

Abstract

The utility model belongs to the field of railway track manufacturing equipment, particularly relates to a reinspection tool after welding is completed, and more particularly relates to an inspection ruler. Comprising a ruler seat and at least one digital display ruler arranged on the ruler seat, and the ruler seat at least comprises a first reference surface and a second reference surface; the first reference surface and the second reference surface are both parallel to the upper / lower end surface of the ruler seat, and the difference is that the second reference surface is closer to a measuring head of the digital display ruler after being bent; the first reference surface and the measuring head of the digital display ruler have a certain span and can cross a welding seam to check whether the connected steel rails at the two ends are coplanar or not and whether the problem of serious welding dislocation exists or not. The rail bottom can be embedded into the clamping groove formed by the bent part of the second reference surface and the main body part, the second reference surface can abut against the edge of a welding seam on one side of the rail bottom, a measuring head of the measuring scale can abut against the edge of the other side, and whether the welding seam is staggered up and down or deviated or not is detected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to railway track manufacturing equipment field, more specifically relates to a reinspection tool after welding, more specifically relates to a testing ruler. BACKGROUND

[0002] Rail is the core part of the rail, shape similar to "G" character. As shown in the figure, the rail head (h) is the part of train wheel direct contact, bears huge pressure and friction; rail waist (w) plays the role of connecting upper and lower parts; rail bottom (f) is used for and rail tie etc. Support structure is connected. Figure 1

[0003] The actual use of rail is not integrally formed, but uses the segmented rail to carry out the butt welding, and the specific butt joint mode is as shown in the figure, after welding, as shown in the figure, the rail after production is almost invisible joint, and the joint is reserved in the figure for the purpose of demonstration. Figure 2 Figure 3 After welding, the quality of the welding interface needs to be checked. Including appearance inspection, flatness inspection, surface quality inspection, etc.

[0004] In the conventional inspection, whether the rail head of the two end rails after welding is coplanar, whether the welding joint has deviation on the face where the longitudinal center line of the rail top surface is located is an indispensable step. At the same time, the upper and lower sides of the rail bottom have welds, and the flatness of the welds is better controlled when welding the same face. INVENTION CONTENTS

[0005] Technical problem: the technical problem to be solved by the present application is to provide a multi-function measuring ruler capable of inspecting the flatness of the rail after butt welding and whether the welds are misaligned.

[0006] Technical scheme, in order to solve the above technical problem, the present application provides a new technical scheme, as follows:

[0007] A testing ruler, comprising a ruler seat and at least one digital ruler arranged on the ruler seat, the ruler seat comprising at least a first reference surface and a second reference surface;

[0008] The main body of the ruler seat is a flat and thin plate body, the length direction is a, the width direction is b, the thickness direction is c, the upper and lower end faces in the b direction are b1 and b2 respectively, the left and right end faces in the c direction are c1 and c2 respectively, the digital ruler is arranged on one side of the main body, and the ruler bar direction of the digital ruler is arranged in the b direction;

[0009] The first reference surface is arranged on the other side of the main body and is extended and stretched by a part of b1 and / or b2;

[0010] The first reference surface is arranged on the other side of the main body and is extended and stretched by a part of b1 and / or b2;

[0011] ​​The first reference surface and the measuring head of the digital caliper have a certain span, which can cross the weld to check whether the two connected rails are coplanar and whether there is a serious misalignment problem in welding. At the same time, the flatness of a certain section of the rail surface can be measured, and if there is a pit, the depth of the pit can be checked to see whether it meets the use requirements.

[0012] The c1 or c2 surface on one side of the digital caliper is arranged vertically with a connecting plate, the connecting plate is bent at a certain angle, a section in the b direction is selected for bidirectional symmetric stretching to form upper and lower end faces, and the second reference surface is the upper end face or the lower end face. The clamping groove formed by the bending part and the main part can embed the rail bottom therein, and the second reference surface can be placed at the edge of the weld on one side of the rail bottom, and the measuring head of the measuring ruler can be placed at the edge of the other side to check whether the weld is misaligned or offset up and down. Specifically, before measurement, the measuring head and the second reference surface are calibrated and reset, after the rail bottom is embedded in the clamping groove, the reference surface is first contacted with one side of the weld, and then the measuring head is contacted with the weld on the other side of the rail bottom, and whether the size of the digital caliper is offset is checked.

[0013] Further, the distance between the second reference surface and the end face of the ruler seat is specifically less than the distance between the first reference surface and the end face of the ruler seat. When the second reference surface is used again, it needs to be embedded in the rail bottom of the steel rail, and the upper surface and the lower surface of the rail bottom are not parallel to each other, and the upper surface has a certain inclination angle, which is mostly a circular arc surface. Therefore, the area of the second reference surface should not be set too large, otherwise it cannot freely enter and exit along the rail bottom; and a relatively large reference surface can improve the accuracy of flatness inspection, therefore, the first reference surface is mainly used for detecting flatness, so the lowermost end of the second reference surface should not exceed the first reference surface.

[0014] Further, the overall shape of the ruler seat can be set as L-shaped, that is, two plates are connected vertically to each other, the longer one is called the long side, and the shorter one is called the short side; the first reference surface is located at the end face of the short side of the L-shaped whole (herein, the "end face of the long side" and the "end face of the short side" generally refer to the terminal end), a connecting plate is arranged on the plate surface close to the end face of the long side, and the initial position of the connecting plate is perpendicular to the plate surface and is bent towards the end face of the long side. After bending, the two side end faces close to the terminal end are symmetrically extended to form the second reference surface.

[0015] Further, the bent part is a fitting surface, and the fitting surface is fitted with the upper end face of the rail bottom cross section profile.

[0016] Further, the digital caliper is located on one side of the connecting plate, and the "one side" here refers to one side of the connecting plate connected with the plate surface, and is arranged close to the end face of the long side.

[0017] Further, a plurality of round holes are arranged on the ruler seat.

[0018] Further, a groove is arranged in the middle of the end face where the first reference surface is located. The design of the circular hole and the groove mainly serves to reduce thermal strain of the scale caused by temperature changes, and secondarily to reduce the weight of the scale.

[0019] Further, at least one first connecting hole group composed of at least one connecting hole is arranged at the end face close to the long side of the scale, and at least one second connecting hole group composed of at least one connecting hole is arranged at the middle position of the scale, and the connecting hole is used for connecting the digital display scale. During flatness inspection, two digital display scales can be used for simultaneous inspection, thereby improving the accuracy.

[0020] Further, the digital display scale comprises a first digital display scale and a second digital display scale, the first digital display scale is connected to the first connecting hole group, and the second digital display scale is connected to the second connecting hole group. The span of the first digital display scale and the first reference surface is large, and sometimes there is a space constraint during use, and the detection requirement of small span flatness cannot be met, so the two digital display scales can not only improve the adaptability of the measuring scale, but also improve the inspection accuracy.

[0021] Further, a detachable measuring head is arranged at both ends of the scale bar of the digital display scale. The measuring head and the scale bar are connected through a connecting piece, and a limiting groove is arranged on the side wall of the connecting hole to avoid rotation of the measuring head during use and affect the measurement accuracy. The main purpose of arranging the measuring head is to replace the measuring head only when the measuring head is worn after a long time of use, thereby prolonging the service life of the digital display scale.

[0022] The beneficial effects of the present application are as follows: through the span design of the first reference surface and the digital display scale, the flatness and misalignment of the welded steel rail can be accurately detected; through the arrangement of the first reference surface and the second reference surface, not only the up-down misalignment of the steel rail weld can be detected, but also the surface flatness of the steel rail can be detected, including whether the pit depth meets the use requirement, which is suitable for various detection scenarios; the L-shaped scale and the matching surface are designed to closely fit the rail bottom, thereby ensuring the stability and accuracy during detection, avoiding complex operation, and improving the detection efficiency. Through the detachable measuring head design, the service life of the digital display scale can be prolonged by replacing the measuring head only. At the same time, the addition of the circular hole and the groove effectively reduces the thermal strain of the scale caused by temperature changes, reduces the weight, and improves the portability. The flatness, misalignment and surface flatness of the weld can be evaluated in one detection, thereby reducing the detection time and labor cost, and providing an economic and efficient solution for the quality control of the steel rail welding. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figures 1-3 The schematic diagram of the steel rail and its welding mentioned in the background section of the specification;

[0024] Figure 4 The front view schematic diagram of the scale of the embodiment of the present application;

[0025] Figure 5 This is a three-dimensional schematic diagram of the ruler base according to an embodiment of this application. The directions a, b, and c are marked in the figure, where surfaces b1 and b2 and surfaces c1 and c2 are two opposite surfaces in the directions b and c, respectively.

[0026] Figure 6 This is a three-dimensional schematic diagram of the ruler base according to an embodiment of this application;

[0027] Figure 7 This is a top view of the ruler holder according to an embodiment of this application;

[0028] Figure 8 This is a front view schematic diagram of the entire inspection ruler according to an embodiment of this application;

[0029] Figure 9 for Figure 8 A three-dimensional reference;

[0030] Figure 10 This is a schematic diagram of the ruler and probe according to an embodiment of this application;

[0031] Figures 11-13 The following is a schematic diagram illustrating the usage process of an embodiment of this application.

[0032] 1. Ruler base; 2. Ruler strip; 3. First reference surface; 4. Second reference surface; 5. Slot; 6. Weld; 7. Connecting plate; 8. Groove; 9. Probe; 10. Mating surface; 11. Connecting hole; 12. First digital display ruler; 13. Second digital display ruler; 14. Probe; 15. Connector; 16. Limit key; 17. Limit groove. Detailed Implementation

[0033] like Figures 4-7 As shown: The main body of the ruler base 1 is a flat thin plate with length direction a, width direction b, and thickness direction c. The upper and lower end faces along direction b are b1 and b2, respectively, and the left and right end faces along direction c are c1 and c2, respectively. The digital ruler is set on one side of the main body and is specifically connected to the c1 surface. The ruler strip 2 of the digital ruler is set along direction b.

[0034] The first reference surface 3 is located on the other side of the main body and is extended downward from a portion of the left side of b2. The end face after extension is the first reference surface 3.

[0035] The first reference surface 3 and the measuring head 14 of the digital ruler have a certain span, which can span the weld 6 to check whether the two ends of the rail are coplanar and whether there is a serious misalignment problem in the welding. At the same time, it can also measure the flatness of a section of rail surface. If there are pits, it can check whether the depth of the pits meets the usage requirements.

[0036] The C2 surface on one side of the digital display ruler is vertically provided with a connecting plate 7, the connecting plate 7 is bent by a certain angle, the two end faces near the terminal end are selected and bidirectional symmetrically stretched in the B direction to form upper and lower end faces, and the second reference surface 4 is the upper end face or the lower end face. The clamping groove 5 formed by the bent part and the main part can embed the rail bottom, the second reference surface 4 can be in contact with the edge of the weld 6 on one side of the rail bottom, and the measuring head 14 of the measuring ruler can be in contact with the edge on the other side to check whether the weld 6 is dislocated upward and downward or offset. Specifically, before measurement, the measuring head 14 and the second reference surface 4 are calibrated and reset, after the rail bottom is embedded in the clamping groove 5, the reference surface is first in contact with one side of the weld 6, and then the measuring head 14 is in contact with the weld 6 on the other side of the rail bottom, so as to check whether the size of the digital display ruler is offset.

[0037] The distance between the second reference surface 4 and the end face of the ruler seat 1 is specifically less than the distance between the first reference surface 3 and the end face of the ruler seat 1. When the second reference surface 4 is used again, it needs to be embedded in the rail bottom of the steel rail, and the upper surface and the lower surface of the rail bottom are not parallel to each other, and the upper surface has a certain inclination angle, which is mostly a circular arc surface. Therefore, the area of the second reference surface 4 should not be set too large, otherwise it cannot freely enter and exit along the rail bottom; and a relatively large reference surface can improve the inspection accuracy of flatness. Therefore, the first reference surface 3 is mainly used for detecting flatness, so the lowermost end of the second reference surface 4 should not exceed the first reference surface 3.

[0038] Specifically, the overall shape of the ruler seat 1 can be set as L-shaped, that is, two plate bodies connected perpendicularly to each other, the longer one is called the long side, and the shorter one is called the short side; the first reference surface 3 is located on the end face of the short side of the L-shaped whole (herein, the "long side" and "long side end face" and the "short side" and "short side end face" generally refer to the terminal end), the connecting plate 7 is arranged on the plate surface near the long side end face, the initial position of the connecting plate 7 is perpendicular to the plate surface, and the connecting plate 7 is bent towards the long side end face, and after bending, the two side end faces near the terminal end are symmetrically extended to form the second reference surface 4.

[0039] The bent part is a fitting surface 10, and the fitting surface 10 is fitted with the upper end surface cross-sectional profile of the rail bottom of the steel rail. That is, the fitting surface 10 is also set as a circular arc shape.

[0040] The digital display ruler is located on one side of the connecting plate 7 and is arranged near the long side end face. Here, one side refers to one side of the connecting plate 7 and the plate surface of the ruler seat 1.

[0041] A plurality of circular holes are arranged on the ruler seat 1. A groove 8 is arranged in the middle of the end face where the first reference surface 3 is located. The circular holes and the groove 8 are mainly designed to reduce the thermal strain of the ruler seat 1 due to temperature changes, and secondarily to reduce the self weight of the ruler seat 1.

[0042] The ruler seat 1 is provided with a first connecting hole group 11 composed of two connecting holes 11 near the long side end face, and a second connecting hole group 11 composed of two connecting holes 11 is arranged at the middle position of the ruler seat 1. The connecting holes 11 are used for connecting the digital display ruler. In the flatness inspection, two digital display rulers can be used for simultaneous inspection to improve the accuracy.

[0043] As shown in Figure 8 and Figure 9 , the digital display ruler includes a first digital display ruler 12 and a second digital display ruler 13. The first digital display ruler 12 is connected to the first connecting hole group 11, and the second digital display ruler 13 is connected to the second connecting hole group 11. The span of the first digital display ruler 12 and the first reference surface 3 is large, and sometimes there is a space constraint in use, and it cannot meet the detection demand of small span flatness. Therefore, the two digital display rulers can not only improve the adaptability of the measuring ruler, but also improve the inspection accuracy.

[0044] As shown in Figure 10 , the ruler bar 2 of the digital display ruler is provided with a detachable measuring head 14 at both ends. The measuring head 14 and the ruler bar 2 are connected through a connecting piece 15. The side wall of the connecting piece 15 is provided with a limiting key 16 which is embedded in the limiting groove 17 of the connecting through hole to avoid the rotation of the measuring head 14 in use, which affects the measurement accuracy. The main purpose of the arrangement of the measuring head 14 is to replace the measuring head 14 only when the measuring head 14 is worn after a long time of use, thereby prolonging the service life of the digital display ruler.

[0045] In use, the first step is to calibrate the digital display ruler and reset it to zero with the corresponding reference surface. In the measurement of whether the weld 6 on the rail bottom is dislocated on the upper and lower surfaces, it can be referred to Figures 11-12 for inspection and measurement. In the measurement of flatness, it can be referred to Figure 13 for inspection and measurement.

Claims

1. A checking ruler comprising a ruler base (1) and at least one digital display ruler arranged on the ruler base (1), characterized in that, The ruler seat (1) comprises at least a first reference surface (3) and a second reference surface (4); The main body of the ruler seat (1) is a flat and thin plate body, the length direction is a, the width direction is b, the thickness direction is c, the upper and lower end faces in the b direction are b1 and b2 respectively, and the left and right end faces in the c direction are c1 and c2 respectively, a digital ruler is arranged on one side of the main body, and the direction of the ruler bar (2) of the digital ruler is arranged along the b direction; The first reference surface (3) is arranged on the other side of the main body and is extended and stretched by a part of b1 and / or b2; The c1 or c2 surface on the side of the digital ruler is arranged perpendicularly to a connecting plate (7), the connecting plate (7) is bent at a certain angle, and a section of the connecting plate (7) is bidirectionally symmetrically stretched along the b direction to form upper and lower end faces, and the second reference surface (4) is the upper end face or the lower end face.

2. The rule of claim 1 wherein, The distance between the second reference surface (4) and the end face of the ruler seat (1) is specifically less than the distance between the first reference surface (3) and the end face of the ruler seat (1).

3. A rule as claimed in claim 1 or 2, wherein, The overall shape of the ruler seat (1) is L-shaped, the first reference surface (3) is located at the end face of the short side of the L-shaped whole, the connecting plate (7) is arranged on the plate surface close to the end face of the long side, the initial position of the connecting plate (7) is perpendicular to the plate surface, and the connecting plate (7) is bent towards the end face of the long side, and after being bent, the two side end faces close to the end are symmetrically extended to form the second reference surface (4).

4. The rule of claim 3 wherein, The bent part is a fitting surface (10), and the fitting surface (10) is fitted with the upper end face cross-sectional profile of the rail bottom.

5. The rule of claim 3 wherein, The digital ruler is arranged on one side of the connecting plate (7) and close to the end face of the long side.

6. A rule as claimed in claim 4 or 5, wherein, A plurality of round holes are arranged on the ruler seat (1).

7. The rule of claim 6 wherein, A groove (8) is arranged in the middle of the end face where the first reference surface (3) is located.

8. The rule of claim 7 wherein, At least one connecting hole (11) is arranged on the end face of the long side of the ruler seat (1) to form a first connecting hole (11) group, and at least one connecting hole (11) is arranged at the middle position of the ruler seat (1) to form a second connecting hole (11) group, and the connecting hole (11) is used for connecting the digital ruler.

9. The rule of claim 8 wherein, The digital ruler comprises a first digital ruler (12) and a second digital ruler (13), the first digital ruler (12) is connected to the first connecting hole (11) group, and the second digital ruler (13) is connected to the second connecting hole (11) group.

10. The rule of claim 9 wherein, Detachable measuring heads (14) are arranged at the two ends of the ruler bar (2) of the digital ruler.

Images