Device for polishing welding seam in welded pipe

Abstract

The utility model provides a device for polishing a welding seam in a welded pipe, and belongs to the field of steel pipe repairing. The grinding device comprises a grinding platform, a grinding head motor is arranged on the grinding platform, a rotating shaft is connected to the end of an output shaft of the grinding head motor, a grinding piece is arranged at the end, away from the grinding head motor, of the rotating shaft, a transverse moving structure is further arranged between the rotating shaft and the grinding piece, and the transverse moving structure can drive the grinding piece to move. A placing plate is further arranged on the grinding platform, and a fixing structure is arranged in the placing plate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of steel pipe repair, especially relates to a device for polishing the internal weld of welded pipe. BACKGROUND

[0002] The polishing technology of the internal weld of welded pipe mainly involves the surface treatment of the internal weld of welded pipe. This process is mainly to eliminate burrs, unevenness and possible welding defects generated during the welding process, so that the weld reaches a smooth and defect-free state, thereby meeting the needs of various application scenarios. The technical principle of polishing the internal weld of welded pipe is mainly based on mechanical friction and chemical treatment. By using professional polishing tools and abrasives, the weld is subjected to mechanical friction to remove excess substances and uneven parts generated during welding. At the same time, chemical treatment methods such as pickling can also be combined to further remove small particles and impurities that may be generated during welding.

[0003] At present, the polishing of the internal weld of welded pipe mainly relies on manual operation or simple mechanical devices. Although manual operation is flexible, it is inefficient and requires high skills and experience of the operator. At the same time, manual operation is prone to uneven polishing, omissions and other problems, making it difficult to ensure the polishing quality of the weld. While the traditional mechanical device can improve the efficiency to some extent, due to its simple structure, it lacks pertinence and adaptability, and it is difficult to achieve ideal polishing effect for different types of welds and welded pipe materials. In addition, the dust and smoke generated during the polishing process of the weld also have certain impact on the environment and the health of the operator.

[0004] For example, a polishing device for internal weld of straight seam welded pipe is disclosed in Chinese patent document [Patent Application No. CN202120318743.9], which comprises a polishing device main body, the end of the polishing device main body is rotatably connected with a polishing disc through a rotating shaft, the end of the polishing device main body is located on one side of the polishing disc and is fixedly installed with a second protective cover through bolts, the inside of the second protective cover is provided with a first protective cover, the two sides of the first protective cover are integrally formed with sliding plates, and the inside of the two sides of the second protective cover is provided with a sliding groove; by designing the first protective cover inside the second protective cover, the sliding plates can be slid in the sliding grooves after use to slide the first protective cover and the second protective cover on the outer surface of the polishing disc, and after closing, the first protective cover and the second protective cover are fixedly installed by rotating and fixing the knob. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above problem, and provides a device for polishing the internal weld of welded pipe.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of device of welding pipe inner weld polishing, including polishing platform, the polishing platform is equipped with abrasive head motor, the output shaft end of abrasive head motor is connected with rotating shaft, the end of rotating shaft away from abrasive head motor is equipped with polishing piece, rotating shaft and polishing piece are also equipped with transverse movement structure between, the transverse movement structure can drive polishing piece to move, the polishing platform is also equipped with placing plate, and the placing plate is equipped with fixed structure.

[0008] In the device of welding pipe inner weld polishing, the transverse movement structure includes a transverse shaft connected to the polishing piece, a placing cavity is provided in the transverse shaft, the rotating shaft extends into the placing cavity, and a support shaft is provided on the outer surface of the rotating shaft, the support shaft abuts against and slidably connects with the inner wall of the placing cavity.

[0009] In the device of welding pipe inner weld polishing, a connecting groove is provided in the rotating shaft, a connecting rod is slidably connected in the connecting groove, the connecting rod is rotatably connected with the transverse shaft through a rotating bearing, and the end of the connecting rod extending out of the transverse shaft is fixedly connected with the polishing piece.

[0010] In the device of welding pipe inner weld polishing, an inner wall support structure is provided at the end of the transverse shaft close to the polishing piece.

[0011] In the device of welding pipe inner weld polishing, the inner wall support structure includes two support wheels respectively located on the upper and lower sides of the transverse shaft.

[0012] In the device of welding pipe inner weld polishing, each support wheel is connected with a support linear actuator provided in the transverse shaft.

[0013] In the device of welding pipe inner weld polishing, a rubber pad layer is covered on the outer surface of the support wheel.

[0014] In the device of welding pipe inner weld polishing, a polishing disc is provided at the end of the polishing piece away from the transverse shaft, the polishing disc is in the shape of a disc, and the smaller end of the polishing disc is placed away from the polishing piece.

[0015] In the device of welding pipe inner weld polishing, the fixed structure includes a front end block and a left side block fixed on the placing plate, the front end block and the left side block are vertically placed on the horizontal plane of the placing plate, the front end block corresponds to a rear end block, the left side block corresponds to a right side block, and the rear end block and the right side block are respectively connected with fixed linear actuators provided on the placing plate.

[0016] In the device for polishing the inner weld of a welded pipe, the polishing platform is provided with a sliding groove, the transverse moving structure is connected with the sliding groove through a supporting sliding block, and the placing plate is connected with the sliding groove.

[0017] Compared with the prior art, the device has the advantages that:

[0018] 1. The device is automatically polished by a machine, without manual operation, high efficiency, and guaranteeing the polishing quality of the weld.

[0019] 2. The inner wall supporting structure is supported in the inner wall of the welded pipe, so that the polishing position is not deviated due to the shaking of the polishing piece caused by the pushing force generated during the polishing process.

[0020] 3. Before polishing, the supporting wheel is tightly abutted on the inner wall of the welded pipe in a stable position through the straight-line driver and the extruded rubber pad, so that the stability of the supporting wheel and the inner wall of the welded pipe is further increased. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the overall structure;

[0022] Figure 2 is Figure 1 a plan view of the placing plate;

[0023] Figure 3 is Figure 1 an enlarged view of the inner wall supporting structure.

[0024] In the figure: the polishing platform 10, the grinding head motor 11, the rotating shaft 12, the polishing piece 13, the transverse moving structure 14, the placing plate 15, the fixing structure 16, the transverse shaft 17, the placing cavity 18, the supporting shaft 19, the connecting groove 20, the connecting rod 21, the inner wall supporting structure 22, the supporting wheel 23, the supporting straight-line driver 24, the rubber pad 25, the polishing disc 26, the front end block 27, the left side block 28, the rear end block 29, the right side block 30, the fixing straight-line driver 31, the sliding groove 32, and the supporting sliding block 33. DETAILED DESCRIPTION

[0025] The device for polishing the inner weld of a welded pipe will be further described in detail in combination with the drawings and the specific embodiments.

[0026] The device for polishing the inner weld of a welded pipe is provided in the utility model, which is combined with Figures 1-3As shown, including polishing platform 10, the polishing platform 10 is provided with grinding head motor 11, the output shaft end of the grinding head motor 11 is connected with the rotating shaft 12, the end of the rotating shaft 12 away from the grinding head motor 11 is provided with polishing piece 13, the rotating shaft 12 and polishing piece 13 are also provided with transverse movement structure 14, the transverse movement structure 14 can drive the polishing piece 13 to move, the polishing platform 10 is also provided with placing plate 15, the placing plate 15 is provided with fixing structure 16.

[0027] In this embodiment, the welded pipe is placed on the placing plate 15 and fixed by the fixing structure 16, the polishing piece 13 moves to the inside of the welded pipe by the transverse movement structure 14, the rotating shaft 12 rotates by the working of the grinding head motor 11, so that the polishing piece 13 rotates to polish the welded part to repair the work, which is polished automatically by the machine without manual operation.

[0028] The transverse movement structure 14 includes a transverse shaft 17 connected with the polishing piece 13, the transverse shaft 17 is provided with a placing cavity 18, the rotating shaft extends into the placing cavity 18, the outer surface of the rotating shaft 12 is provided with a support shaft 19, the support shaft 19 abuts against the inner wall of the placing cavity 18 and is in sliding connection with the inner wall.

[0029] In this embodiment, the transverse shaft 17 will move transversely, so displacement will occur between the transverse shaft 17 and the rotating shaft 12, therefore, the support shaft 19 is used to realize the displacement between the transverse shaft 17 and the rotating shaft 12, and the rotating shaft 12 rotates in the placing cavity 18 and supports by the support shaft 19.

[0030] The rotating shaft 12 is provided with a connecting groove 20, the connecting groove 20 is in sliding connection with a connecting rod 21, the connecting rod 21 is in rotary connection with the transverse shaft 17 through a rotary bearing, and the end of the connecting rod 21 extending out of the transverse shaft 17 is fixedly connected with the polishing piece 13.

[0031] In this embodiment, the polishing piece 13 moves with the transverse shaft 17, therefore, the connecting rod 21 is used to realize the displacement between the polishing piece 13 and the rotating shaft 12, and the connecting rod 21 rotates in the transverse shaft 17 through the rotary bearing.

[0032] The end of the transverse shaft 17 close to the polishing piece 13 is provided with an inner wall supporting structure 22.

[0033] In this embodiment, in the polishing stage, the inner wall supporting structure 22 supports in the inner wall of the welded pipe, preventing the polishing piece 13 from shaking due to the pushing force generated in the polishing process, which causes the polishing position to deviate.

[0034] The inner wall support structure 22 comprises two support wheels 23 respectively arranged on the upper and lower sides of the transverse shaft 17.

[0035] In the embodiment, the support wheels 23 abut against the inner wall of the welded pipe, and when the polishing piece 13 moves close to the polishing position, the support wheels 23 rotate and move in the inner wall of the welded pipe, so that the movement is more stable.

[0036] Each of the support wheels 23 is connected with a support linear driver 24 arranged in the transverse shaft 17.

[0037] In the embodiment, before polishing, the support wheels 23 are tightly abutted against the inner wall of the welded pipe in the stable position by the linear driver 24.

[0038] The outer surface of the support wheel 23 is covered with a rubber pad layer 25.

[0039] In the embodiment, the rubber pad layer 25 is extruded when the linear driver 24 is actuated, and the stability of the support wheel 23 and the inner wall of the welded pipe is further increased by the rubber pad layer 25.

[0040] The polishing piece 13 is provided with a polishing disc 26 away from the end surface of the transverse shaft 17, the polishing disc 26 is disc-shaped, and the smaller-diameter end of the polishing disc 26 is placed away from the polishing piece 13.

[0041] In the embodiment, the welds of the inner wall of the welded pipe have different heights, and the polishing disc 26 can adapt to welds of different thicknesses.

[0042] The fixing structure 16 comprises a front end block 27 and a left side block 28 fixed to the placement plate 15, the front end block 27 and the left side block 28 are vertically arranged on the horizontal plane of the placement plate 15, the front end block 27 corresponds to a rear end block 29, the left side block 28 corresponds to a right side block 30, and the rear end block 29 and the right side block 30 are respectively connected with a fixing linear driver 31 arranged on the placement plate 15.

[0043] In the embodiment, the welded pipe is placed on the placement plate 15, and the welded pipe is fixed between the front end block 27, the rear end block 29, the right side block 30 and the left side block 28 by the work of the fixing linear driver 31, and the front end block 27 and the left side block 28 are fixed to the placement plate 15 and also play a role of positioning.

[0044] The polishing platform 10 is provided with a sliding groove 32, the transverse moving structure 14 is slidably connected with the sliding groove 32 through a support sliding block 33, the placement plate 15 is slidably connected with the sliding groove 32, and the support sliding block 33 and the placement plate 15 are both connected with a position linear driver.

[0045] In the embodiment, the position of the welded pipe can be adjusted.

[0046] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0047] Although the polishing platform 10, the grinding head motor 11, the rotating shaft 12, the grinding disc 13, the horizontal moving structure 14, the placing plate 15, the fixing structure 16, the horizontal moving shaft 17, the placing cavity 18, the supporting shaft 19, the connecting groove 20, the connecting rod 21, the inner wall supporting structure 22, the supporting wheel 23, the supporting linear driver 24, the rubber pad layer 25, the polishing disc 26, the front end block 27, the left side block 28, the rear end block 29, the right side block 30, the fixing linear driver 31, the sliding groove 32, the supporting sliding block 33 and the like are used more frequently in the description, the use of these terms is only for the convenience of describing and explaining the essence of the present application; any additional limitation by interpreting them is contrary to the spirit of the present application.

Claims

1. A device for grinding the inside weld of a welded pipe, comprising a grinding platform (10), characterized in that, The polishing platform (10) is provided with a grinding head motor (11), the output shaft end of the grinding head motor (11) is connected with a rotating shaft (12), the end of the rotating shaft (12) away from the grinding head motor (11) is provided with a polishing piece (13), and the rotating shaft (12) and the polishing piece (13) are further provided with a transverse moving structure (14).

2. A device for polishing the inside weld of a welded pipe according to claim 1, characterized in that, The transverse moving structure (14) includes a transverse moving shaft (17) connected with the polishing piece (13), the transverse moving shaft (17) is provided with a placing cavity (18), the rotating shaft extends into the placing cavity (18), and the outer surface of the rotating shaft (12) is provided with a supporting shaft (19) which abuts against and is in sliding connection with the inner wall of the placing cavity (18).

3. A device for polishing the inside weld of a welded pipe according to claim 2, characterized in that, The rotating shaft (12) is provided with a connecting groove (20), the connecting groove (20) is in sliding connection with a connecting rod (21), the connecting rod (21) is in rotary connection with the transverse moving shaft (17) through a rotary bearing, and the end of the connecting rod (21) extending out of the transverse moving shaft (17) is fixedly connected with the polishing piece (13).

4. A device for polishing the inside weld of a welded pipe according to claim 3, characterized in that, The end of the transverse moving shaft (17) close to the polishing piece (13) is provided with an inner wall supporting structure (22).

5. A device for polishing the inside weld of a welded pipe according to claim 4, characterized in that, The inner wall supporting structure (22) includes two supporting wheels (23) located on the upper side and the lower side of the transverse moving shaft (17) respectively.

6. A device for polishing the inside weld of a welded pipe according to claim 5, characterized in that, Each supporting wheel (23) is connected with a supporting linear driver (24) arranged in the transverse moving shaft (17).

7. A device for polishing the inside weld of a welded pipe according to claim 6, characterized in that The outer surface of the supporting wheel (23) is covered with a rubber pad layer (25).

8. A device for polishing the inside weld of a welded pipe according to claim 1, characterized in that, The end surface of the polishing piece (13) away from the transverse moving shaft (17) is provided with a polishing disc (26), the polishing disc (26) is in a disc shape, and the end of the polishing disc (26) with a smaller diameter is away from the polishing piece (13).

9. A device for polishing the inside weld of a welded pipe according to claim 1, characterized in that, The fixing structure (16) includes a front end block (27) and a left side block (28) fixed to the placing plate (15), the front end block (27) and the left side block (28) are vertically arranged on the horizontal plane of the placing plate (15), the front end block (27) corresponds to a rear end block (29), the left side block (28) corresponds to a right side block (30), and the rear end block (29) and the right side block (30) are respectively connected with a fixing linear driver (31) arranged on the placing plate (15).

10. A device for polishing the inside weld of a welded pipe according to claim 1, characterized in that, The polishing platform (10) is provided with a sliding groove (32), the transverse moving structure (14) is in sliding connection with the sliding groove (32) through a supporting sliding block (33), the placing plate (15) is in sliding connection with the sliding groove (32), and the supporting sliding block (33) and the placing plate (15) are both connected with a position linear driver.

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