Internal supporting device for welding cylindrical structure

Abstract

The utility model provides an internal supporting device for welding a cylindrical structure, which relates to the technical field of welding auxiliary supporting equipment and comprises a mounting seat, a first telescopic arm and a profiling plate. One end of each first telescopic arm is hinged to the mounting base, a rigid rod is arranged at the other end of each first telescopic arm, and the axes of the first telescopic arms are located in the same plane; the rigid rod is perpendicular to the plane where the axes of the first telescopic arms are coplanar. The profiling plate is fixedly connected with the rigid rod, the profiling plate is used for being attached to the inner wall face of the welded workpiece, and the profiling plate can be bent towards the mounting base; the welding support can effectively support a workpiece to be welded in the workpiece to be welded, can relieve the deformation quantity of the workpiece to be welded under the influence of thermal stress, improves the welding quality, can also be suitable for welding operation of longitudinal welding seams and transverse welding seams, and is wider in applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding auxiliary support equipment technical field especially relates to a kind of internal support device for cylindrical structure welding. BACKGROUND

[0002] For large cylindrical equipment, for example, the telescopic arm of crane, welding is generally needed during preparation. Its welding seam can be longitudinal weld or transverse weld; But no matter which form of weld, the weld position is weak area, in order to ensure the strength of equipment, the welding quality of weld is particularly important.

[0003] During welding, the workpiece to be welded is prone to deformation under the action of welding thermal stress, thereby affecting the welding quality.

[0004] Therefore, a structure is needed to effectively support the workpiece to suppress the deformation of the workpiece to be welded during welding. SUMMARY

[0005] The utility model discloses a kind of internal support device for cylindrical structure welding, to solve the problems existing in prior art, it can be effectively supported in the inside of workpiece to be welded, the deformation amount of workpiece to be welded under the influence of thermal stress can be relieved, improve welding quality, It can also be suitable for the welding operation of longitudinal weld and transverse weld two kinds of weld, more widely applicable.

[0006] To achieve the above object, the utility model provides the following scheme:

[0007] A kind of internal support device for cylindrical structure welding, including mounting seat, first telescopic arm and profile plate;Multiple first telescopic arms are provided, one end of the first telescopic arm is hinged with the mounting seat, the other end is provided with rigid rod, the axis of multiple first telescopic arms is all located in the same plane;The rigid rod is perpendicular to the plane that the axis of multiple first telescopic arms is common;The profile plate is fixedly connected with the rigid rod, and the profile plate is used to be attached with the inner wall surface of workpiece to be welded, the profile plate can be bent towards the mounting seat.

[0008] As an embodiment, it further includes two second telescopic arms, two second telescopic arms are fixed in the two ends of mounting seat, and the axis of two telescopic arms is located on the same straight line;The axis of two second telescopic arms is coplanar with the axis of first telescopic arm;The end of the second telescopic arm is provided with the rigid rod and the profile plate.

[0009] As an embodiment, the first telescopic arm and the second telescopic arm each comprise a first connecting rod, a threaded sleeve and a second connecting rod, the first connecting rod is fixedly connected with the mounting base or is hinged, two ends of the threaded sleeve are respectively threadedly connected with the first connecting rod and the second connecting rod, and an end of the second connecting rod is provided with the rigid rod and the profiling plate.

[0010] As an embodiment, the outer wall of the threaded sleeve is in a square shape, and the four corners of the square shape are all rounded.

[0011] As an embodiment, the rigid rod is made of a magnet.

[0012] As an embodiment, the first telescopic arms are all located on one side of the second telescopic arm or on both sides of the second telescopic arm.

[0013] As an embodiment, the profiling plate extends towards one side or both sides of the rigid rod.

[0014] As an embodiment, the first telescopic arms are all located on one side of the second telescopic arm, and the mounting base is provided with a connecting portion connected with the mounting base in another internal supporting device.

[0015] As an embodiment, the mounting base is made of a magnet.

[0016] As an embodiment, the first telescopic arm is hinged with the mounting base through a pin shaft.

[0017] The utility model has the following technical effects relative to the prior art:

[0018] The utility model discloses a rigid rod and a profiling plate are arranged at the end of the first telescopic arm, which can effectively support the workpiece to be welded from the inside, does not affect the welding operation of the welding gun on the outside of the workpiece to be welded, and can relieve the deformation of the workpiece to be welded under the influence of thermal stress, thereby improving the welding quality.

[0019] Other technical effects of other technical schemes in the utility model can be described in the specific embodiments. DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 The structure diagram of the first telescopic arm distributed on both sides of the second telescopic arm in an embodiment of the present application is shown in the figure.

[0022] Figure 2 The side sectional structure diagram of the present application is shown in the figure. Figure 1

[0023] Figure 3 The local enlarged view of A in the present application is shown in the figure. Figure 2

[0024] Figure 4 The structure diagram of the first telescopic arm distributed on one side of the second telescopic arm in an embodiment of the present application is shown in the figure.

[0025] Mark explanation:

[0026] 1, mounting seat; 2, first telescopic arm; 3, second telescopic arm; 4, rigid rod; 5, profiling plate; 6, first connecting rod; 7, screw sleeve; 8, second connecting rod. Specific implementation

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0028] The purpose of the present application is to provide an internal support device for cylindrical structure welding, to solve the problems in the prior art, to effectively support the welded workpiece inside, to relieve the deformation of the welded workpiece under the influence of thermal stress, to improve the welding quality, and to be suitable for longitudinal and transverse welding seam welding operations, and to have wider applicability.

[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0030] As Figures 1-4 ​​As shown, the embodiment provides an internal support device for cylindrical structure welding, which comprises a mounting base 1, a plurality of first telescopic arms 2 and a profiling plate 5; wherein the plurality of first telescopic arms 2 are arranged on the same plane; one end of the first telescopic arm 2 is hinged to the mounting base 1, and the other end is provided with a rigid rod 4 which is perpendicular to the plane in which the axes of the plurality of first telescopic arms 2 lie. The profiling plate 5 is fixedly connected with the rigid rod 4, and is used to be attached to the inner wall of the workpiece to be welded. Specifically, the profiling plate 5 can be located at the connection position of the rigid rod 4 and the first telescopic arm 2, that is, the profiling plate 5 is connected with the rigid rod 4 at the same time and is fixedly connected with the first telescopic arm 2. Meanwhile, the profiling plate 5 can also be arranged in multiple intervals along the extension direction of the rigid rod 4. As a profiling plate 5 arrangement, the normal of the connection position of the profiling plate 5 and the rigid rod 4 is perpendicular to the extension direction of the rigid rod 4, and at the same time coincides or is parallel to the axial direction of the first telescopic arm 2. The profiling plate 5 is made of a certain thickness of metal plate, which can be bent towards the mounting base 1 to adapt to the inner wall of the cylindrical workpiece to be welded of different diameters. Of course, the profiling plate 5 can be flat in the natural state, which can support the planar inner wall of the cylindrical workpiece to be welded, and can also support the arc-shaped inner wall of the cylindrical workpiece to be welded by deformation, and can restore to the flat shape (if it is arc-shaped in the natural state, it will restore to the arc-shaped shape in the natural state) after being taken out from the cylindrical workpiece to be welded.

[0031] In use, the internal support device is arranged in the workpiece to be welded, and the length of each first telescopic arm 2 is adjusted in sequence, so that the rigid rod 4 and the profiling plate 5 at the end of the first telescopic arm 2 abut against the inner wall of the workpiece to be welded. After abutting, the rigid rod 4 is parallel to the axial direction of the workpiece to be welded, and the profiling plate 5 is attached to the inner wall of the workpiece to be welded. When both workpieces to be welded are supported by the internal support device, the workpieces to be welded are welded. When the weld of the workpiece to be welded is longitudinal (parallel to the axial direction), the rigid rod 4 can effectively support the edge of the heat-concentrated welding position, play a major supporting role, and the profiling plate 5 supports other areas near the welding position, plays an auxiliary supporting role; when the weld of the workpiece to be welded is transverse (circumferential), the profiling plate 5 can effectively support the edge of the heat-concentrated welding position, play a major supporting role, and the rigid rod 4 supports other areas near the welding position, play an auxiliary supporting role. It should be noted that the internal support device should be arranged in the area of the workpiece to be welded which is prone to deformation under thermal stress, and the internal support device can be arranged in multiple according to the situation. After welding is completed, the first telescopic arm 2 is shortened, and the rigid rod 4 and the profiling plate 5 lose the supporting effect on the workpiece to be welded, and then the internal support device is taken out. In the embodiment, the internal support device is usually used for large workpieces to be welded, and the diameter is usually about 1m or even several meters, so the worker can completely climb into the cylindrical workpiece to be welded to disassemble the internal support device.

[0032] In addition, the first telescopic arm 2 is hinged to the mounting base 1 in the embodiment, and specifically, the hinging can be achieved through a pin shaft, so that the position of the first telescopic arm 2 can be adjusted to support the appropriate position to achieve stable support on the surface welding workpiece. For the regular-shaped workpiece to be welded, the lengths of the first telescopic arms 2 symmetrically relative to the center of the workpiece to be welded are balanced as much as possible, so that the mounting base 1 is located at the center position of the workpiece to be welded after welding. For the irregular-shaped workpiece to be welded, the lengths of the first telescopic arms 2 corresponding to the positions can be adjusted to achieve support on each position.

[0033] Therefore, the embodiment can effectively support the workpiece to be welded from the inside by arranging the rigid rods 4 and the profiling plates 5 at the end of the first telescopic arm 2, which does not affect the welding operation of the welding torch outside the workpiece to be welded, and can also alleviate the deformation of the workpiece to be welded under the influence of thermal stress, thereby improving the welding quality. In addition, the internal support device in the embodiment can be applied to both longitudinal and transverse welding operations, and can also adapt to various workpieces to be welded within a certain size range through the length of the first telescopic arm 2, so the applicability is wider.

[0034] As an embodiment, the internal support device in the embodiment further includes two second telescopic arms 3, which are fixed at the two ends of the mounting base 1, and the axes of the two telescopic arms are located on the same straight line; the axes of the two second telescopic arms 3 are coplanar with the axis of the first telescopic arm 2; and the end of the second telescopic arm 3 is provided with a rigid rod 4 and a profiling plate 5. The distribution mode of the rigid rods 4 and the profiling plates 5 on the second telescopic arm 3 in the embodiment is the same as that of the rigid rods 4 and the profiling plates 5 on the first telescopic arm 2. The two fixed second telescopic arms 3 are beneficial to abutting and fixing the internal support device on the inner wall of the workpiece to be welded first, and then adjusting the first telescopic arm 2 will be more convenient.

[0035] The first telescopic arm 2 and the second telescopic arm 3 in the embodiment each include a first connecting rod 6, a threaded sleeve 7 and a second connecting rod 8, the first connecting rod 6 is fixedly connected or hinged to the mounting base 1 (the first connecting rod 6 in the first telescopic arm 2 is hinged to the mounting base 1, and the first connecting rod 6 in the second telescopic arm 3 is fixedly hinged to the mounting base 1), both ends of the threaded sleeve 7 are provided with internal threads, which are respectively threadedly connected with the first connecting rod 6 and the second connecting rod 8, and the end of the second connecting rod 8 is provided with a rigid rod 4 and a profiling plate 5. The screw threads on the first connecting rod 6 and the second connecting rod 8 in the embodiment are the same, when the threaded sleeve 7 is rotated to gradually move away from the mounting base 1, if the second connecting rod 8 is kept from rotating with the threaded sleeve 7, the threaded sleeve 7 will approach the rigid rod 4 on the second connecting rod 8. In actual adjustment of the length of the first telescopic arm 2 or the second telescopic arm 3, the second connecting rod 8 can also achieve the adjusting effect by rotating the threaded sleeve 7, but after the adjustment is completed, the rigid rod 4 must be parallel to the axial direction of the workpiece to be welded.

[0036] In order to facilitate the staff to screw the screw sleeve 7, the outer wall cross section of the screw sleeve 7 in the embodiment is square shape, and the four corners of the square shape are all rounded.

[0037] In order to facilitate the fixation of the internal support device on the surface of the iron material welded workpiece, and avoid the movement of the first telescopic arm 2 and the second telescopic arm 3, the rigid rod 4 in the embodiment is made of a magnet, which can be adsorbed on the inner wall surface of the iron welded workpiece.

[0038] The plurality of first telescopic arms 2 in the embodiment are located on the same side of the second telescopic arm 3 or on both sides of the second telescopic arm 3. When the first telescopic arm 2 is located on the same side of the second telescopic arm 3, the axis lines of the two second telescopic arms 3 are located on the same straight line, and at this time, the internal support device can only selectively support the positions in the range of one half of the circumferential direction; when the first telescopic arm 2 is arranged on both sides of the second telescopic arm 3, the internal support device can selectively support the positions in the range of the whole circumferential direction.

[0039] As an embodiment, the profiling plate 5 in the embodiment extends to one side or both sides of the rigid rod 4. When the adjacent first telescopic arm 2 or second telescopic arm 3 is close, the swing angle is small, and the profiling plate 5 extending to both sides of the rigid rod 4 is prone to interference problem, the profiling plate 5 on one of the adjacent first telescopic arm 2 or second telescopic arm 3 can extend to one side of the rigid rod 4.

[0040] When the first telescopic arm 2 is located on the same side of the second telescopic arm 3, the profiling plate 5 on the second telescopic arm 3 extends to one side of the rigid rod 4, and the extending direction is towards the first telescopic arm 2 adjacent to the second telescopic arm 3. At this time, the mounting seat 1 has a connecting part connected with the mounting seat 1 in another internal support device, so that the mounting seats 1 in the two internal support devices can be connected and fixed, and the use in the welded workpiece with longitudinal weld is facilitated.

[0041] As an embodiment, the mounting seat 1 is made of a magnet, and the mounting seats 1 in the two internal support devices can be connected by adsorption.

[0042] As an embodiment, the first telescopic arm 2 is hinged with the mounting seat 1 through a pin shaft.

[0043] The adaptive changes according to actual needs are all within the protection scope of the utility model.

[0044] The principle and implementation mode of the utility model are described by applying specific examples, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An internal support device for use in the welding of cylindrical structures, characterized in that, The utility model relates to a welding device for welding the inner wall of a workpiece, which comprises: a mounting base; a plurality of first telescopic arms, the axes of the plurality of first telescopic arms being in the same plane; one end of the first telescopic arm is hingedly connected to the mounting base, and the other end is provided with a rigid rod perpendicular to the plane in which the axes of the plurality of first telescopic arms lie; and a profiling plate fixedly connected to the rigid rod and used for abutting against the inner wall of the workpiece to be welded, the profiling plate being capable of bending towards the mounting base.

2. Internal support device for the welding of cylindrical structures according to claim 1, characterized in that, The utility model also comprises two second telescopic arms fixed to the two ends of the mounting base, the axes of the two second telescopic arms being in the same line; the axes of the two second telescopic arms are in the same plane as the axes of the first telescopic arms; the end of the second telescopic arm is provided with the rigid rod and the profiling plate.

3. Internal support device for the welding of cylindrical structures according to claim 2, characterized in that, The first telescopic arm and the second telescopic arm each comprise a first connecting rod, a threaded sleeve and a second connecting rod; the first connecting rod is fixedly connected to or hingedly connected to the mounting base; the two ends of the threaded sleeve are respectively threadedly connected to the first connecting rod and the second connecting rod; and the end of the second connecting rod is provided with the rigid rod and the profiling plate.

4. Internal support device for the welding of cylindrical structures according to claim 3, characterized in that, The outer wall of the threaded sleeve is square in cross section, and the four corners of the square shape are rounded.

5. The internal support device for welding of cylindrical structures according to any one of claims 1 to 4, characterized in that, The rigid rod is made of a magnet.

6. The internal support device for the welding of a cylindrical structure according to any one of claims 2 to 4, characterized in that, The plurality of first telescopic arms are located on the same side of the second telescopic arm or on both sides of the second telescopic arm.

7. Internal support device for the welding of cylindrical structures according to claim 6, characterized in that, The profiling plate extends towards one side or both sides of the rigid rod.

8. The internal support device for the welding of a cylindrical structure according to any one of claims 2 to 4, characterized in that, When the plurality of first telescopic arms are located on the same side of the second telescopic arm, the mounting base has a connecting portion for connecting with the mounting base in the other internal support device.

9. Internal support device for the welding of cylindrical structures according to claim 7, characterized in that, The mounting base is made of a magnet.

10. The internal bracing device for the welding of cylindrical structures of claim 1, wherein, The first telescopic arm is hingedly connected to the mounting base by a pin shaft.

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