CN220127905U - Rail clamping device suitable for ultra-narrow gap welding - Google Patents
Rail clamping device suitable for ultra-narrow gap welding Download PDFInfo
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- CN220127905U CN220127905U CN202320830316.8U CN202320830316U CN220127905U CN 220127905 U CN220127905 U CN 220127905U CN 202320830316 U CN202320830316 U CN 202320830316U CN 220127905 U CN220127905 U CN 220127905U
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- mounting platform
- welded
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- 238000003466 welding Methods 0.000 title claims abstract description 112
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 86
- 239000010959 steel Substances 0.000 claims abstract description 86
- 238000001816 cooling Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000003832 thermite Substances 0.000 description 1
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- Machines For Laying And Maintaining Railways (AREA)
Abstract
The utility model discloses a steel rail clamping device suitable for ultra-narrow gap welding, which comprises a telescopic base and a C-shaped clamp, wherein the C-shaped clamp is arranged on the telescopic base; the telescopic base comprises a telescopic frame and a mounting platform arranged at the top of the telescopic frame, the C-shaped clamp is used for fixing a steel rail to be welded on the mounting platform, and in a steel rail fixing state, one side of a clamping opening of the C-shaped clamp is abutted against the upper surface of the rail bottom of the steel rail, and the other side of the clamping opening of the C-shaped clamp is abutted against the lower surface of the mounting platform; the two sides of the mounting platform are respectively provided with supporting feet for separating a height gap between the mounting platform and the steel rail to be welded. According to the utility model, the telescopic base is arranged, the position of the end part of the steel rail to be welded can be adjusted by the up-down expansion of the base, so that the required reverse deformation angle is preset, the deformation control of the steel rail to be welded is realized, and the combination of the reverse deformation method and the rigid fixing method is realized by the arrangement of the C-shaped clamp, so that the welding quality of the steel rail joint can be improved, and the welding operation efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of rail welding, in particular to a steel rail clamping device suitable for ultra-narrow gap welding.
Background
At present, railway traffic is in a rapidly-developed age, and each industry has set new requirements on the speed and the transportation capacity of railways, and the key point of the new requirements is the subsequent laying of heavy-duty railways and the popularization of seamless lines. The seamless line reduces the collision of the hub at the joint of the steel rail by a welding method, thereby reducing the shock and the abrasion.
The main current methods for welding steel rails on site comprise thermite welding, flash welding, pneumatic welding and arc welding, and the welding methods have the problems of low joint strength, difficult control of appearance quality, large heat input, high cost and the like. The ultra-narrow gap welding is a novel high-efficiency low-heat input welding method, adopts a straight groove with the diameter of 4-6mm, regulates and controls the arc to act on the welding surface and the bottom at the two sides simultaneously by means of the constraint of a welding flux sheet, and realizes the formation of single-channel multi-layer welding seams. Therefore, the application of ultra-narrow gap welding to the welding of rails of a seamless line is of great importance.
However, the welding process is local heating, and a temperature difference is formed on the steel rail, so that residual stress and deformation are generated on the steel rail to be welded. The control of welding deformation is always a difficult problem to be solved at home and abroad. When welding in a narrow gap, if the deformation of the steel rails at two sides is inconsistent, serious obstacle and difficulty are brought to the centering of a welding gun in the process of welding in the narrow gap of the steel rails, and the subsequent welding process and the welding quality are affected. The prior method for controlling welding deformation mainly comprises a rigid fixing method, a preheating method, an inverse deformation method and a welding sequence method, but the single method cannot be applied at present aiming at the ultra-narrow gap welding deformation of the steel rail.
Disclosure of Invention
The utility model aims to provide a steel rail clamping device suitable for ultra-narrow gap welding, which combines an inverse deformation method and a rigid fixing method to control the deformation of a steel rail to be welded, improves the welding quality of a steel rail joint and improves the welding operation efficiency. The technical scheme adopted by the utility model is as follows.
In one aspect, the present utility model provides a rail clamping device suitable for ultra-narrow gap welding, comprising: a retractable base and a C-clip;
the telescopic base comprises a telescopic frame and a mounting platform arranged at the top of the telescopic frame, the C-shaped clamp is used for fixing a steel rail to be welded on the mounting platform, and in a steel rail fixing state, one side of a clamping opening of the C-shaped clamp is abutted against the upper surface of the rail bottom of the steel rail, and the other side of the clamping opening of the C-shaped clamp is abutted against the lower surface of the mounting platform;
the two sides of the mounting platform are respectively provided with supporting feet for separating a height gap between the mounting platform and the steel rail to be welded.
According to the utility model, the telescopic base is arranged, the position of the end part of the steel rail to be welded can be adjusted by the up-down expansion of the base, so that the required reverse deformation angle is preset, the deformation control of the steel rail to be welded is realized, and the C-shaped clamp is arranged, so that the adjusted end part of the steel rail to be welded can be fixed, the situation that the welding quality is influenced due to the offset welding caused by unstable fixation during welding is prevented, the centering of a welding gun between welding seams during welding is ensured, and the welding quality of the steel rail is improved.
The height gap can be used for installing gaskets, conductive blocks and the like for backing welding. The supporting legs can be detachably arranged on the mounting platform and used for positioning the positions of the end parts of the steel rails in the welding process in advance during the adjustment of the height and the groove.
Optionally, the rail clamping device further comprises a conductive block and a gasket for backing welding, wherein the conductive block is detachably arranged in the height gap, and the gasket is arranged between the conductive block and the rail to be welded; the conductive block is provided with a conductive lead-out part. The conductive block can be a conductive copper block for realizing arc welding, and the conductive lead-out part is used for electrically connecting the welding negative electrode clamp.
Optionally, side support frames are respectively arranged on the side parts of the mounting platform, which correspond to the directions pointed by the two ends of the welding line, and the lower ends of the side support frames are detachably connected with the mounting platform;
the two side support frames are respectively provided with a cooling block through a connecting plate;
the steel rail channels which are matched with the section shapes of the steel rails are arranged between the cooling blocks at the two sides, so that the edge parts of the cooling blocks at the two sides can be respectively contacted with the ends of the steel rails to be welded, which are positioned in the steel rail channels.
The heat dissipation cooling effect of the welding seam in the welding process can be optimized through the scheme, and welding deformation is further reduced. And the welding gun can be kept at a certain temperature, so that the service life of the welding gun is prolonged.
Optionally, at least two detachable gap bars are arranged in the middle of the mounting platform along the extending direction of the welding line. The two gap rod pieces are used for calibrating the width of a groove between the end faces of two steel rails to be welded.
Optionally, the clearance rod member adopts a screw rod, and the screw rod is in threaded connection with the mounting platform.
Optionally, at least 2 supporting legs are respectively arranged on two sides of the mounting platform. The positions of the two steel rails to be welded are more stable when the reverse deformation angle is preset and adjusted.
Optionally, a welding gun guide rail is fixedly installed at the top of the side support frame, and the extending direction of the welding gun guide rail is parallel to the welding surface of the steel rail to be welded.
Optionally, a limit rod piece is further arranged on the side part of the mounting platform;
in the steel rail fixing state, one end of the clamping opening of the C-shaped clamp is abutted against one side of the steel rail, and the limit rod piece is abutted against the edge of the rail bottom at the other side of the steel rail. When the C-shaped clamp clamps one side of the steel rail, force which causes the steel rail to move towards the other side is generated, and the limit rod piece can prevent the corresponding deviation.
Optionally, the rail clamping device further comprises a rail supporting frame for supporting the rail body to be welded.
Advantageous effects
According to the utility model, the reverse deformation method is combined with the rigid fixing method, the preset reverse deformation angle before welding is realized by adopting the telescopic base, and meanwhile, the end part to be welded of the steel rail after the preset reverse deformation angle is fixed by adopting the C-shaped clamp, so that the reverse deformation control in the welding process can be realized, the steel rail is reliably fixed in the welding process, the welding gun is easy to center, the poor welding quality caused by deformation, bias welding and the like is reduced, and the welding efficiency and the welding quality at the joint are improved.
Drawings
FIG. 1 is a schematic view showing the structure of a rail clamping device according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram showing a process of presetting an inverse deformation angle according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram showing the structure of the conductive block and the pad after determining the reverse deformation angle according to an embodiment of the present utility model;
in fig. 1 to 3: the welding gun comprises a 1-welding gun guide rail, a 2-cooling block, a 3-connecting plate, a 4-gasket, a 5-conductive block, a 6-supporting leg, a 7-C-shaped clamp, an 8-steel rail, a 9-side supporting frame, a 10-conductive lead-out part, an 11-limit rod piece, a 12-telescopic base, a 13-steel rail supporting frame and a 14-gap rod piece.
Description of the embodiments
Further description is provided below in connection with the drawings and the specific embodiments.
The clamping device is designed to preset an inverse deformation angle before welding and fix, so that the combination of an inverse deformation method and a rigid fixing method is realized, deformation in the welding process is resisted, the fixing reliability of the steel rail in the welding process is ensured, the welding quality of the joint of the steel rail is improved, and the welding operation efficiency is improved.
Examples
This embodiment is applicable to ultra-narrow gap welded rail clamping apparatus, and reference may be made to fig. 2, which includes: a retractable base 12 and a C-clip 7;
the telescopic base comprises a telescopic frame and a mounting platform arranged at the top of the telescopic frame, the C-shaped clamp is used for fixing a steel rail 8 to be welded on the mounting platform, and in a steel rail fixing state, one side of a clamping opening of the C-shaped clamp is abutted against the upper surface of the rail bottom of the steel rail, and the other side of the clamping opening of the C-shaped clamp is abutted against the lower surface of the mounting platform;
the two sides of the mounting platform are respectively provided with supporting feet 6 for separating a height gap between the mounting platform and the steel rail to be welded.
The height gap can be used for installing gaskets, conductive blocks and the like for backing welding. The height of the supporting leg is set according to the actual distance between the bottom surface of the steel rail and the mounting platform during welding, and the supporting leg can be detachably arranged on the mounting platform and used for positioning the position of the end part of the steel rail in the welding process in advance during supporting height and groove adjustment.
Examples
Referring to fig. 1 to 3, this embodiment is also designed as follows on the basis of embodiment 1.
The side parts of the mounting platform, which correspond to the directions pointed by the two ends of the welding line, are respectively provided with a side support frame 9, the lower ends of the side support frames are detachably connected with the mounting platform, as shown in figure 1, the support plates of the side support frames are fixedly connected with the mounting platform through bolts;
the two side support frames are respectively provided with a cooling block 2 through a connecting plate 3; the steel rail channels which are matched with the section shapes of the steel rails are arranged between the cooling blocks at the two sides, so that the edge parts of the cooling blocks at the two sides can be respectively contacted with the ends of the steel rails to be welded, which are positioned in the steel rail channels.
Referring to fig. 1, in order to facilitate the installation of the welding gun and the movement during the welding process, in this embodiment, a welding gun guide rail 1 is fixedly installed at the top of the side support frame, and the extending direction of the welding gun guide rail is parallel to the welding surface of the steel rail to be welded.
As shown in fig. 3, the rail clamping device further comprises a conductive block 5 and a gasket 4 for backing welding, wherein the conductive block is detachably arranged in the height gap, and the gasket is arranged between the conductive block and a rail to be welded; the conductive block may be a conductive copper block for implementing arc welding, and the conductive block is provided with a conductive lead-out portion 10 for electrically connecting the welding negative electrode clamp, and referring to fig. 1, the conductive lead-out portion may be a conductive copper screw.
Referring to fig. 2, at least two detachable gap bars 14 are provided in the middle of the mounting platform in the direction of extension of the weld. The two gap rod pieces are used for calibrating the width of a groove between the end faces of two steel rails to be welded. The clearance rod piece can adopt a screw rod which is in threaded connection with the mounting platform, and after the reverse deformation angle is adjusted and fixed, the clearance rod piece can be removed and a conductive block and a gasket are mounted at corresponding positions.
Referring to fig. 1 to 3, the supporting legs are respectively provided with at least 2 supporting legs at two sides of the mounting platform, so that the positions of two steel rails to be welded are more stable when the reverse deformation angle is preset and adjusted. In order to ensure reliable contact between the bottom of the steel rail and the gasket without affecting the preset reverse deformation angle, the supporting leg is detachably arranged on the mounting platform and can be removed after the conductive block and the gasket are mounted.
Consider that: when the C-clip clamps one side of the rail, a force is generated to move the rail toward the other side, and in order to organize the rail position deviation caused by the clamping force of the C-clip, as shown in fig. 2, in this embodiment, a limit rod is further disposed at the side of the mounting platform. In the fixed state of the steel rail, one end of the clamping opening of the C-shaped clamp is abutted against one side of the steel rail, and the limit rod piece is abutted against the edge of the rail bottom at the other side of the steel rail.
As shown in fig. 1 to 3, the rail clamping device of the present embodiment further includes a rail supporting frame 13 for supporting under the vicinity body of the end portion of the rail to be welded, for the convenience of positioning and adjusting the rail.
The principle of operation of rail welding in this embodiment is as follows.
Placing a steel rail such as BU71MN after polishing a surface to be welded on a steel rail support frame, adjusting the relative position of a mounting platform and the surface to be welded of the steel rail, firstly, determining the width of the bottom of a groove between the two ends of the steel rail to be welded by using a gap rod piece, and adjusting the height of the mounting platform by means of telescopic adjustment of a telescopic base so as to preset a required reverse deformation angle, wherein the width of the groove is between 4 mm and 6 mm;
and dismantling the gap rod piece, placing conductive blocks at corresponding positions, symmetrically placing gaskets used for backing welding at the bottom of the steel rail groove through the conductive blocks, tightly fixing the gaskets at the bottom of the steel rail, and performing spot welding through manual welding.
And finally, fixedly connecting the mounting platform with the steel rail through a C-shaped clamp.
The cooling block is installed through the connecting plate, the guide rail is fixedly connected above the side plate, the welding gun is convenient to walk, the conductive lead-out part is connected with the conductive copper block placed below the gasket and used as a connecting point of the welding negative electrode clamp, and then welding can be started.
When welded to the rail web half, the C-clip is removed. And (5) detaching the whole clamp when the welding is finished.
In summary, the utility model can realize the control of the reverse deformation in the welding process, can ensure that the steel rail is reliably fixed in the welding process, the welding gun is easy to center, the poor welding quality caused by deformation, partial welding and the like is reduced, and the welding efficiency and the welding quality at the joint are improved.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are all within the protection of the present utility model.
Claims (9)
1. A rail clamping device suitable for ultra-narrow gap welding is characterized by comprising: a retractable base and a C-clip;
the telescopic base comprises a telescopic frame and a mounting platform arranged at the top of the telescopic frame, the C-shaped clamp is used for fixing a steel rail to be welded on the mounting platform, and in a steel rail fixing state, one side of a clamping opening of the C-shaped clamp is abutted against the upper surface of the rail bottom of the steel rail, and the other side of the clamping opening of the C-shaped clamp is abutted against the lower surface of the mounting platform;
the two sides of the mounting platform are respectively provided with supporting feet for separating a height gap between the mounting platform and the steel rail to be welded.
2. The steel rail clamping device suitable for ultra-narrow gap welding according to claim 1, further comprising a conductive block and a gasket for backing welding, wherein the conductive block is detachably arranged in the height gap, and the gasket is arranged between the conductive block and a steel rail to be welded; the conductive block is provided with a conductive lead-out part.
3. The steel rail clamping device suitable for ultra-narrow gap welding as claimed in claim 1, wherein side supports are respectively arranged on the mounting platform and correspond to the side parts of the directions pointed by the two ends of the welding line, and the lower ends of the side supports are detachably connected with the mounting platform;
the two side support frames are respectively provided with a cooling block through a connecting plate;
the steel rail channels which are matched with the section shapes of the steel rails are arranged between the cooling blocks at the two sides, so that the edge parts of the cooling blocks at the two sides can be respectively contacted with the ends of the steel rails to be welded, which are positioned in the steel rail channels.
4. A rail clamping device for ultra-narrow gap welding as claimed in claim 1 wherein at least two removable gap bars are provided in the middle of the mounting platform in the direction of extension of the weld.
5. A rail clamping apparatus adapted for ultra-narrow gap welding as claimed in claim 4 wherein said gap bar member employs a screw threaded to said mounting platform.
6. A rail clamping device suitable for ultra-narrow gap welding as claimed in claim 1 wherein the support feet are provided with at least 2 support feet on each side of the mounting platform.
7. A rail clamping device for ultra-narrow gap welding as claimed in claim 3 wherein the top of the side support frame is fixedly provided with a welding gun guide rail, the direction of extension of which is parallel to the welding face of the rail to be welded.
8. The steel rail clamping device suitable for ultra-narrow gap welding as claimed in claim 1, wherein the side part of the mounting platform is further provided with a limit rod;
in the steel rail fixing state, one end of the clamping opening of the C-shaped clamp is abutted against one side of the steel rail, and the limit rod piece is abutted against the edge of the rail bottom at the other side of the steel rail.
9. A rail clamping device for ultra-narrow gap welding as claimed in claim 1 further comprising a rail support bracket for supporting the rail body to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320830316.8U CN220127905U (en) | 2023-04-14 | 2023-04-14 | Rail clamping device suitable for ultra-narrow gap welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320830316.8U CN220127905U (en) | 2023-04-14 | 2023-04-14 | Rail clamping device suitable for ultra-narrow gap welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220127905U true CN220127905U (en) | 2023-12-05 |
Family
ID=88959325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320830316.8U Active CN220127905U (en) | 2023-04-14 | 2023-04-14 | Rail clamping device suitable for ultra-narrow gap welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220127905U (en) |
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2023
- 2023-04-14 CN CN202320830316.8U patent/CN220127905U/en active Active
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