CN216285084U - Single-probe test block for welding seam of channel steel rail - Google Patents
Single-probe test block for welding seam of channel steel rail Download PDFInfo
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- CN216285084U CN216285084U CN202122603063.4U CN202122603063U CN216285084U CN 216285084 U CN216285084 U CN 216285084U CN 202122603063 U CN202122603063 U CN 202122603063U CN 216285084 U CN216285084 U CN 216285084U
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Abstract
The utility model discloses a groove type steel rail welding seam single-probe test block which comprises a groove type rail simulation part and a fork core block simulation part, wherein the fork core block simulation part is of the same structure as a welding part of a fork core block to be detected and comprises an upper half part and a lower half part which are welded together, the end face of the groove type rail simulation part is welded and connected with the end face of the fork core block simulation part to form a vertical welding seam, flat bottom holes with downward openings are vertically arranged in the groove type rail simulation part and the welding seam part, the flat bottom holes are sequentially arranged along the extension direction of the rail waist of the groove type rail simulation part, and the bottom position height of the flat bottom hole in the groove type rail simulation part is gradually increased from the flat bottom hole closest to the welding seam to the direction far away from the welding seam. The structure of the probe is similar to that of a frog to be detected, the flaw detection sensitivity of the probe at 0 degree can be determined, and other flat-bottom holes in the rail web can be used for scanning DAC curves of straight probes.
Description
Technical Field
The utility model belongs to the field of railway engineering, and particularly relates to a single-probe test block for a welding seam of a channel steel rail.
Background
In order to reduce cost and facilitate processing, the company improves turnouts and adopts a fork core block welded in a sandwich structure, then welds the frog with the structure and a corresponding groove rail to form a complete frog structure, and because the end face formed by different materials of the structural design is welded with a special-shaped structure, a method for carrying out internal structure flaw detection on a welding seam part of the frog, and related test blocks and devices are lacked in the prior art. In order to guarantee the quality of outgoing steel rails of the company, ultrasonic flaw detection is additionally performed on the parts such as the center of a welding line, a heat affected zone and the like on the basis of dye flaw detection on the surfaces of the welding line of a tramcar sandwich and a channel steel rail. In order to detect the weld seam of the corresponding grooved rail by a 0-degree probe, a DAC curve of the 0-degree straight probe needs to be made through the corresponding test block, and the existing test block is lack of the test block of the grooved rail corresponding to the corresponding welding structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a single-probe test block for a groove-shaped steel rail welding line, which is used for solving the technical problem that a DAC curve of a straight probe meeting requirements is difficult to make due to the fact that a test block for welding a groove-shaped rail in a sandwich structure is lacked in the prior art.
The groove type steel rail welding seam single-probe test block comprises a groove type rail simulation part and a fork core block simulation part, wherein the fork core block simulation part is the same in structure as a welding part of a to-be-detected fork core block and comprises an upper half part and a lower half part which are welded together, the end face of the groove type rail simulation part is welded with the end face of the fork core block simulation part to form a vertical welding seam, flat-bottom holes with downward and vertical openings are formed in the groove type rail simulation part and the welding seam part, the flat-bottom holes are sequentially arranged in the rail waist extending direction of the groove type rail simulation part, and the bottom position height of the flat-bottom holes in the groove type rail simulation part is gradually increased from the flat-bottom holes closest to the welding seam to the direction away from the welding seam.
Preferably, the slot type rail simulation part is an inverted step structure, the step structure is divided into a plurality of step areas which are gradually raised from the welding line to the bottom of the welding line in the direction far away from the welding line, the flat bottom holes are distributed in the step areas, and the openings of the flat bottom holes are formed in the bottoms of the step areas.
Preferably, the step area sequentially comprises a step A area, a step B area and a step C area from the welding line to the direction far away from the welding line, the step A area comprises a rail bottom, a rail waist and a rail head, the bottom of the step B area is higher than that of the step A area, and the bottom of the step C area is higher than that of the step B area.
Preferably, the step A area, the step B area and the step C area are respectively provided with two flat-bottom holes, and the distances between the adjacent flat-bottom holes in each step area are equal.
Preferably, the height of the flat bottom hole from the bottom to the opening ranges from 20 mm to 50 mm.
Preferably, only one flat-bottom hole on the weld is provided and has the same height as the flat-bottom hole on the simulated portion of the channel rail closest to the weld.
Preferably, the distance between the flat-bottom holes on the welding seam and the flat-bottom holes closest to the welding seam is equal to the distance between the adjacent flat-bottom holes on the same step region, and the distance between the two adjacent flat-bottom holes on the two adjacent step regions is larger than the distance between the adjacent flat-bottom holes on the same step region.
The utility model has the following advantages: the structure of the utility model is similar to the structure of the frog to be measured, and corresponding flat bottom holes are arranged at the welding seam and the groove rail simulation part, so the flaw detection sensitivity of the probe with the angle of 0 degree is determined by the utility model. And moving the probe along the extension direction of the rail web, and scanning by using other flat-bottom holes on the rail web to make a DAC curve of the straight probe. Simultaneously, through setting up stair structure in this scheme for the processing flat bottom hole is convenient and reliable more, avoids the too big processing that leads to of flat bottom hole degree of depth.
Drawings
FIG. 1 is a top view of a single probe test block for a weld of a channel steel rail according to the present invention.
Fig. 2 is an isometric view of the structure shown in fig. 1.
Fig. 3 is a front view of the structure shown in fig. 1.
Fig. 4 is a right side view of the structure shown in fig. 1.
FIG. 5 is a schematic diagram illustrating the location of flat bottom holes in the structure of FIG. 1.
The labels in the figures are: 1. the device comprises a fork center block simulation part, a groove-shaped rail simulation part 2, a groove-shaped rail simulation part 3, a welding line 4, a rail groove 5, a rail lip 6, a rail head 7, a rail bottom 8, a step vertical face 9, a positioning plate 10, a flat bottom hole 11, a lower half part 12, an upper half part 13, a step A area 14, a step B area 15 and a step C area.
Detailed Description
The following detailed description of the present invention will be given by way of example with reference to the accompanying drawings, in order to assist those skilled in the art in a more complete, accurate and comprehensive understanding of the inventive concepts and solutions of the present invention.
As shown in figures 1-5, the utility model provides a single probe test block for a welding seam of a channel steel rail, which comprises a channel steel rail simulation part 2 and a fork center block simulation part 1, the fork core block simulation part 1 has the same structure as the welding part of the fork core block to be detected and comprises an upper half part 12 and a lower half part 11 which are welded together, the end surface of the groove-shaped rail simulation part 2 is connected with the end surface of the fork core block simulation part 1 in a welding way to form a vertical welding seam 3, the groove-shaped rail simulating part 2 and the welding seam 3 are both provided with flat bottom holes 10 with downward openings and vertical arrangement, the flat bottom holes 10 are arranged in sequence along the extension direction of the rail web 9 of the groove-shaped rail simulating part 2, the bottom position of the flat bottom hole 10 on the channel rail simulating section 2 is gradually raised from the flat bottom hole 10 closest to the weld 3 toward the direction away from the weld 3.
The test block structure has the same composition form as a welded complete frog structure, the thickness of the upper half part 12 of the fork core block simulation part 1 is the same as that of the upper half part 12 of the fork core block, and the material of the test block structure is high wear-resistant alloy steel NM 400; the lower half part 11 of the fork core block simulation part 1 and the lower half part 11 of the fork core block are the same in thickness and made of low alloy steel Q345. The groove-shaped rail simulation part 2 and the fork center block simulation part 1 are welded and connected by adopting a welding structure which is the same as that of a product, so that the detection result on a test block in the ultrasonic flaw detection process is similar to the complete frog structure after welding. While a flat bottom hole 10 with gradually increasing bottom position height is suitable for making a straight probe DAC curve corresponding to the grooved rail.
The groove-shaped rail simulation part 2 is of an inverted step structure, the step structure is sequentially divided into a step A area 13, a step B area 14 and a step C area 15 from the welding seam 3 to a direction far away from the welding seam 3, the step A area 13 comprises a rail bottom 7, a rail waist 9 and a rail head 6, the bottom of the step B area 14 is higher than the bottom of the step A area 13, and the bottom of the step C area 15 is higher than the bottom of the step B area 14. The bottom of the step B area 14 is positioned in the middle of the rail web 9, and the bottom of the step C area 15 is positioned below the rail lip 5 and lower than the bottom of the rail groove 4.
The flat-bottom hole 10 of the welding seam 3 is only one and has the same height as the flat-bottom hole 10 of the groove rail simulating section 2 closest to the welding seam 3. Two flat bottom holes 10 are respectively arranged on the step A area 13, the step B area 14 and the step C area 15. Taking a groove-shaped steel rail welding seam single-probe test block with the height of 180mm as an example, the diameter of the flat bottom hole 10 is 3mm, and the height differences of the bottoms between adjacent step areas on the step structure are equal and are all 60 mm. The height of the flat-bottom hole 10 from the bottom to the opening is 20-50mm, as shown in fig. 4, the flat-bottom hole 10 on the welding seam 3 is a # 1 hole, and the flat-bottom hole 10 on the groove rail simulating part 2 is a # 2-7 hole in sequence from the flat-bottom hole 10 closest to the welding seam 3.
The spacing between adjacent flat bottom holes 10 in each stepped region is equal, the spacing between a flat bottom hole 10 in a weld 3 and the flat bottom hole 10 closest to the weld 3 is equal to the spacing between adjacent flat bottom holes 10 in the same stepped region, and the spacing between two adjacent flat bottom holes 10 in two adjacent stepped regions is greater than the spacing between adjacent flat bottom holes 10 in the same stepped region, e.g. in the example, the spacing between a flat bottom hole 10 and the nearest stepped riser 8 is equal to the spacing between adjacent flat bottom holes 10 in the same stepped region, so that the spacing between two adjacent flat bottom holes 10 in two adjacent stepped regions is equal to twice the spacing between adjacent flat bottom holes 10 in the same stepped region.
The flat-bottom hole 10 and the step structure are combined, so that the actual drilling depth of the flat-bottom hole 10 with the smaller diameter is kept within the range of 20-50mm, the rail web 9 part with the smaller thickness does not need to be drilled with excessive depth, and the drilling precision and reliability are maintained. Avoid the too large drilling depth of the flat bottom hole 10 to cause hole deformation or drill bit damage.
By adopting the structure, when the 30-degree probe flaw detection of the welding seam of the Lincoln welding is carried out, the reflected wave height of the flat-bottom hole 10 at the bottom of the welding seam 3 on the single-probe test block of the welding seam of the channel steel rail is utilized to adjust the proper amplitude of the echo, and then proper surface coupling compensation is carried out according to the condition of a detection surface to serve as the flaw detection sensitivity of the 0-degree probe. The probe is moved along the extension direction of the rail web 9, and the DAC curve of the straight probe is scanned by using other flat-bottom holes 10 on the rail web 9. When the test block is used for scanning the position of the rail web 9 on a product to be tested after the operation is finished, the condition that the 0-degree probe flaw detection result is not smaller than the equivalent weight of the flat bottom hole 10 on the test block is noticed when the welding seam 3 is not allowed to appear, and if the result appears, the product is unqualified.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the utility model is not limited to the specific embodiments disclosed, but is intended to cover various insubstantial modifications of the inventive concepts and solutions disclosed herein, or other applications in which the inventive concepts and solutions are directly applicable without such modifications, and is within the scope of the utility model.
Claims (7)
1. The utility model provides a single probe test block of channel steel rail welding seam which characterized in that: comprises a groove-shaped rail simulation part (2) and a fork core block simulation part (1), wherein the fork core block simulation part (1) has the same structure as the welding part of a fork core block to be detected and comprises an upper half part (12) and a lower half part (11) which are welded together, the end surface of the groove-shaped rail simulation part (2) is connected with the end surface of the fork core block simulation part (1) in a welding way to form a vertical welding line (3), the groove-shaped rail simulation part (2) and the welding seam (3) are respectively provided with a flat bottom hole (10) with a downward opening and arranged vertically, the flat bottom holes (10) are sequentially arranged along the extending direction of the rail web (9) of the groove rail simulation part (2), the bottom position height of the flat bottom hole (10) on the groove rail simulation part (2) is gradually increased from the flat bottom hole (10) closest to the welding seam (3) to the direction far away from the welding seam (3).
2. The single-probe test block for the welding seam of the channel steel rail as claimed in claim 1, wherein: groove rail analog portion (2) is the stair structure of invering, stair structure divide into from welding seam (3) are started to keep away from a plurality of step areas that the direction bottom height of welding seam (3) rises gradually, flat bottom hole (10) distribute in each step area just the opening of flat bottom hole (10) is located the bottom in step area.
3. The single-probe test block for the welding seam of the channel steel rail as claimed in claim 2, wherein: the step area sequentially comprises a step A area (13), a step B area (14) and a step C area (15) from the welding seam (3) to the direction far away from the welding seam (3), the step A area (13) comprises a rail bottom (7), a rail waist (9) and a rail head (6), the bottom of the step B area (14) is higher than the bottom of the step A area (13), and the bottom of the step C area (15) is higher than the bottom of the step B area (14).
4. The single-probe test block for the welding seam of the channel steel rail as claimed in claim 3, wherein: step A district (13), step B district (14) and step C district (15) are all equipped with two flat bottom hole (10), and the interval between the adjacent flat bottom hole (10) in each step region is equal.
5. The single-probe test block for the welding seam of the channel steel rail as claimed in claim 4, wherein: the height range of the flat bottom hole (10) from the bottom to the opening is 20-50 mm.
6. The single-probe test block for the welding seam of the channel steel rail as claimed in claim 1, wherein: the height of the flat-bottom hole (10) on the welding seam (3) is only one and is the same as that of the flat-bottom hole (10) on the groove rail simulation part (2) which is closest to the welding seam (3).
7. The single-probe test block for the welding seam of the channel steel rail as claimed in claim 2, wherein: the distance between the flat bottom holes (10) on the welding seams (3) and the flat bottom holes (10) closest to the welding seams (3) is equal to the distance between the adjacent flat bottom holes (10) on the same step area, and the distance between the two adjacent flat bottom holes (10) on the two adjacent step areas is larger than the distance between the adjacent flat bottom holes (10) on the same step area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122603063.4U CN216285084U (en) | 2021-10-28 | 2021-10-28 | Single-probe test block for welding seam of channel steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122603063.4U CN216285084U (en) | 2021-10-28 | 2021-10-28 | Single-probe test block for welding seam of channel steel rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216285084U true CN216285084U (en) | 2022-04-12 |
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| CN202122603063.4U Active CN216285084U (en) | 2021-10-28 | 2021-10-28 | Single-probe test block for welding seam of channel steel rail |
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| CN (1) | CN216285084U (en) |
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2021
- 2021-10-28 CN CN202122603063.4U patent/CN216285084U/en active Active
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