A pipe weld grinding device

Abstract

This application relates to the field of grinding equipment technology, and in particular to a pipe weld grinding device, which includes a fixing mechanism for fixing the pipe, a grinding mechanism for grinding the pipe weld, and a driving mechanism for driving the grinding mechanism to rotate around the pipe axis. This application has the effect of improving the uniformity of grinding quality at the pipe weld.

Description

Technical Field

[0001] This application relates to the field of grinding equipment technology, and in particular to a device for grinding pipe welds. Background Technology

[0002] Pipelines are widely used in transportation projects for oil, natural gas, and other materials. In long-distance transportation, multiple pipeline sections need to be welded together to form a long section. However, during the welding process, defects such as slag, burrs, and flash will be generated at the weld seam between the two pipelines. These defects can easily lead to corrosion, leakage, and breakage, causing serious environmental pollution and unnecessary economic losses. Therefore, it is necessary to grind the pipeline weld seam.

[0003] During the pipeline welding process, the grinding of the weld seam between two pipelines mainly relies on manual hand-held angle grinders. This process is inefficient and the grinding quality is inconsistent and difficult to standardize, which can easily lead to inconsistent overall pipeline quality. For low-quality ground pipes, secondary welding may even be required for repair, which increases construction costs. Summary of the Invention

[0004] To improve the uniformity of grinding quality at pipe weld seams, this application provides a pipe weld seam grinding device.

[0005] The pipe weld grinding device provided in this application adopts the following technical solution:

[0006] A pipe weld grinding device includes a fixing mechanism for fixing the pipe, a grinding mechanism for grinding the weld of the pipe, and a driving mechanism for driving the grinding mechanism to rotate around the pipe axis.

[0007] By adopting the above technical solution, the fixing mechanism is set to fix the welded pipe, and the weld seam of the pipe is connected to the grinding mechanism. Then, the driving mechanism drives the grinding mechanism to make a circular motion around the axis of the pipe, and the automatic grinding of the weld seam of the pipe is realized during the motion. Compared with manual grinding with an angle grinder, this method is more standardized and makes the grinding quality uniform.

[0008] Optionally, the driving mechanism includes a fixed base and an annular track arranged on the fixed base. The grinding mechanism is slidably connected to the annular track, and the fixed base is provided with a driving structure for driving the grinding mechanism to perform circumferential motion along the annular track.

[0009] By adopting the above technical solution, the grinding mechanism is slidably connected to the ring track and moves in a circle along the ring track under the action of the driving structure, so as to realize the ring grinding of the pipe weld by the grinding mechanism.

[0010] Optionally, the annular track includes an outer track and an inner track, both coaxially arranged, with guide rails provided on the inner side of the outer track and the outer side of the inner track. The driving structure includes an electric cylinder and several balls that abut against each other. Each ball is simultaneously positioned on the guide rails of both the outer and inner tracks. The guide rails of both the outer and inner tracks extend into two straight guide rail segments, each with the electric cylinder fixedly mounted. The extension and retraction direction of the electric cylinder is the same as the guiding direction of the straight guide rail segment, and the extension and retraction end of the electric cylinder abuts against the balls. A sliding block is provided between the two balls, abutting against the two balls. The sliding block is slidably connected to the grinding mechanism, which performs circumferential motion along the outer track.

[0011] By adopting the above technical solution, the guide rails on the outer track and the inner track are combined to form a combined guide rail. The balls are confined within the combined guide rail and can only slide along its trajectory. Electric cylinders are installed on the linear guide rail sections at both ends of the combined guide rail to control the extension and retraction of the extension and retraction ends of the two electric cylinders, thereby controlling the overall movement of each ball. The sliding block set between the two balls slides along the movement direction of the balls under the pressure of the balls. The grinding mechanism is slidably connected to the sliding block to realize that the grinding mechanism makes circumferential motion along the outer track, thereby realizing circumferential grinding of the weld seam of the pipe.

[0012] Optionally, the combined guide rail trajectory formed by the outer track and the inner track is spiral.

[0013] By adopting the above technical solution, the combined guide rail trajectory formed by the outer track and the inner track is spiral-shaped, forming a circular trajectory when viewed from the front, and not intersecting from the side, thereby realizing that the sliding block makes spiral motion while the grinding mechanism makes circular motion.

[0014] Optionally, the grinding mechanism includes a support frame that slides circumferentially on the outside of the outer track. When the support frame is in close contact with the outer track, the frictional resistance between them is greater than the weight of the grinding mechanism. A drive motor is mounted on the support frame, and a grinding wheel is coaxially fixedly connected to the shaft of the drive motor. The grinding wheel is directly opposite the pipe.

[0015] By adopting the above technical solution, a drive motor and a grinding wheel are installed on the support frame to provide a structural foundation for grinding the weld seam of the pipe. The weight of the grinding mechanism is less than the frictional resistance between it and the outer track, so as to prevent the grinding mechanism from rotating under the action of gravity.

[0016] Optionally, a sliding groove is provided on the support frame along the radial direction of the fixed pipe, and a receiving block is slidably arranged in the sliding groove. The shaft of the drive motor passes through and is rotatably connected to the receiving block, and the drive motor is fixed. A drive cylinder is also fixedly arranged on the support frame. The telescopic end of the drive cylinder is fixedly connected to the receiving block and extends and retracts along the guide direction of the sliding groove.

[0017] By adopting the above technical solution, the receiving block can move along the sliding groove guide direction under the action of the driving cylinder, indirectly driving the driving motor and the grinding wheel on the driving motor shaft to move, thereby realizing the distance control between the grinding wheel and the pipe.

[0018] Optionally, a shaft is fixedly mounted on the support frame, and the sliding block is slidably connected to the shaft.

[0019] By adopting the above technical solution, the sliding block slides on the shaft to achieve the sliding block relative to the bearing plate.

[0020] Optionally, the fixing structure includes a support platform, the fixing seat is disposed on the support platform, and the support platform is provided with at least two fixing flanges for fixing the pipe, the fixing flanges being coaxially disposed with the outer rail.

[0021] By adopting the above technical solution, the fixed flange is used to fix the pipe, and the support platform serves as the load-bearing foundation of the equipment.

[0022] Optionally, a reduction motor is fixedly mounted on the support platform, the shaft of the reduction motor is coaxially arranged with the outer rail, and the shaft of the reduction motor is fixedly connected to the fixed base.

[0023] By adopting the above technical solution, the geared motor drives the rotating shaft fixed seat to rotate relative to the support platform, which indirectly causes the ring track to rotate. This allows the grinding mechanism, which is indirectly driven by the balls on the spiral guide rail, to change position again after completing a certain angle of rotation (due to the obstruction of the equipment size, the grinding mechanism cannot complete one full rotation during rotation) in order to complete one full rotation of the pipe.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By using a fixing mechanism, a driving mechanism, and a grinding mechanism, the weld seams of pipes are ground in a mechanized or semi-automatic manner, thereby unifying the precision and improving the stability of product quality.

[0026] 2. The outer and inner tracks provide a spiral channel for the balls, and the spiral motion of the ball chain is converted into the circular motion of the grinding mechanism through the sliding block. This indirectly provides the stable and high-precision driving force of the electric cylinder to the grinding mechanism, thereby achieving high-precision and stable operation of the grinding mechanism. Attached Figure Description

[0027] Figure 1 This is an assembly diagram of an embodiment of this application;

[0028] Figure 2 This is a partial cross-sectional view of an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the driving mechanism and grinding mechanism according to an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the grinding mechanism according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Fixing mechanism; 11. Support platform; 12. Fixing flange; 13. Gear motor; 2. Drive mechanism; 21. Fixing seat; 22. Circular track; 221. Outer track; 222. Inner track; 223. Guide rail; 23. Drive structure; 231. Ball bearing; 232. Electric cylinder; 233. Sliding block; 3. Grinding mechanism; 31. Support frame; 32. Drive motor; 33. Grinding wheel; 34. Sliding groove; 35. Receiving block; 36. Drive cylinder; 37. Shaft. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0034] This application discloses a device for grinding pipe welds.

[0035] Reference Figure 1 and Figure 2 A pipe weld grinding device includes a fixing mechanism 1 for fixing the pipe, a grinding mechanism 3 for grinding the weld of the pipe, and a driving mechanism 2 for driving the grinding mechanism 3 to rotate around the pipe axis.

[0036] The fixed structure includes a horizontally arranged support platform 11, on which two fixing flanges 12 for fixing the welded pipe are provided. The two fixing flanges are coaxially arranged. A reduction motor 13 is fixedly arranged on the support platform 11, and the shaft of the reduction motor 13 is coaxially arranged with the fixing flanges 12.

[0037] Reference Figure 3 and Figure 4The drive mechanism 2 includes a fixed base 21 and an annular track 22 that is circular and disposed on the fixed base 21. The fixed base 21 is a cylindrical shape with one side open and is coaxially disposed with the shaft of the reduction motor 13. The shaft of the reduction motor 13 is fixedly connected to the closed end of the fixed base 21. The fixed base 21 is rotatably connected to the support platform 11. The annular track 22 is coaxially disposed on the inner side wall of the fixed base 21. The fixed base 21 is also provided with a drive structure 23 for driving the grinding mechanism 3 to move in a circular motion along the annular track 22.

[0038] The annular track 22 includes an outer track 221 and an inner track 222, both of which are circular. They are coaxially arranged and coaxially arranged with the fixed flange 12. Guide rails 223 are provided on the inner sidewall of the outer track 221 and the outer sidewall of the inner track 222. The combined guide rail 223 formed by the outer track 221 and the inner track 222 has a spiral trajectory. The drive structure 23 includes an electric cylinder 232 and several tightly abutting ball bearings 231. Each ball bearing 231 is simultaneously confined within the outer track 221 and the inner track 222. On the combined guide rail 223 formed by the two guide rails 223, the spiral guide rail 223 extends into two linear guide rail segments. An electric cylinder 232 is fixedly installed on each of the two linear guide rail segments. The extension and retraction direction of the electric cylinder 232 is set in the same direction as the guide rail segment, and the extension and retraction end of the electric cylinder 232 is set to abut against the ball 231. The angle formed by the projection of the two linear guide rail segments on the plane perpendicular to the axis of the outer rail 221 and the connecting line of the center of the outer rail 221 is less than 180 degrees.

[0039] A sliding block 233 is provided between the two balls 231, and ball grooves are provided on both sides of the sliding block 233. The ball grooves on both sides are tightly abutted against the balls 231 on both sides to prevent the balls 231 from falling off laterally along the sliding block 233. The sliding block 233 is slidably connected to the grinding mechanism 3 along the axis of the outer track 221. The grinding mechanism 3 is slidably connected to the outer track 221 and performs circular motion along the outer track 221.

[0040] The grinding mechanism 3 includes a support frame 31, which includes two mounting plates distributed on opposite sides of the outer track 221. Both mounting plates slide circumferentially on the outer track 221. When the support frame 31 is in close contact with the outer track 221, the frictional resistance between them is greater than the weight of the grinding mechanism 3. The same shaft 37 is fixedly connected to the two mounting plates. The shaft 37 is parallel to the axis of the outer track 221. The sliding block 233 is slidably connected to the shaft 37.

[0041] A sliding groove 34 is provided on the mounting plate along the radial direction of the outer track 221. A receiving block 35 is slidably arranged in the sliding groove 34. A drive motor 32 is fixedly installed on the receiving block 35 on one mounting plate. The rotating shaft of the drive motor 32 is rotatably connected to the receiving blocks 35 on both plates. A drive cylinder 36 is also fixedly installed on the support frame 31. The telescopic end of the drive cylinder 36 is fixedly connected to the receiving block 35 and telescopically extends and retracts along the guide direction of the sliding groove 34. A grinding wheel 33 is coaxially fixedly connected to the rotating shaft of the drive motor 32. The grinding wheel 33 is directly opposite the pipe.

[0042] The implementation principle of the pipe weld grinding device in this application embodiment is as follows: the welded pipe is inserted into the fixed seat 21, and the grinding mechanism 3 is positioned directly opposite the weld of the pipe. The pipe is then fixed by the fixed flange 12. The synchronous extension and retraction of the two electric cylinders 232 controls the movement of each ball 231 along the spiral guide rail 223, thereby indirectly realizing the circumferential movement of the grinding mechanism 3 and performing grinding. When half of the pipe weld has been ground, the reduction motor 13 is driven to rotate, causing the drive mechanism 2 to rotate half a revolution or more, causing the grinding mechanism 3 to move in the opposite direction of its previous grinding. Then, the two electric cylinders 232 are driven again to complete the grinding of the remaining weld of the pipe.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe weld grinding apparatus, characterized by: The utility model provides a pipe grinding device, including the fixed mechanism (1) for fixing pipe material, the polishing mechanism (3) for polishing the weld of pipe material and the drive mechanism (2) for driving the polishing mechanism (3) rotates around the axial rotation of pipe material, the drive mechanism (2) includes fixed seat (21) and the annular track (22) of circular ring and setting on fixed seat (21), the polishing mechanism (3) slip connection is on the annular track (22), be provided with the drive structure (23) for driving the polishing mechanism (3) circular motion along the annular track (22) on fixed seat (21), the annular track (22) includes outer track (221) and inner track (222), both coaxial arrangement, and the inner side of outer track (221) and the outer side of inner track (222) all are provided with guide rail (223), the drive structure (23) includes electric cylinder (232) and a plurality of mutually tight ball (231), each ball (231) is limited to the guide rail (223) of outer track (221) and inner track (222) both, the guide rail (223) of outer track (221) and inner track (222) both extends two linear guide rail sections, both linear guide rail sections are fixedly provided with electric cylinder (232), the telescopic end of electric cylinder (232) is arranged in the same direction with linear guide rail section direction of guidance, and the telescopic end of electric cylinder (232) is arranged in the ball (231), and the sliding block (233) is arranged between two ball (231), and it is arranged in two ball (231), and the sliding block (233) is slidably connected with the polishing mechanism (3), and the polishing mechanism (3) circular motion along outer track (221).

2. A pipe weld grinding apparatus as defined in claim 1, wherein: The combined guide rail (223) formed by the outer track (221) and the inner track (222) has a spiral trajectory.

3. A pipe weld grinding apparatus as defined in claim 1, wherein: The polishing mechanism (3) includes a support frame (31), the support frame (31) is circumferentially slid on the outer side of the outer track (221), and when the support frame (31) is tightly abutted with the outer track (221), the frictional resistance between the support frame (31) and the outer track (221) is greater than the weight of the polishing mechanism (3), a drive motor (32) is arranged on the support frame (31), and a grinding wheel (33) is coaxially and fixedly connected to the rotating shaft of the drive motor (32), and the grinding wheel (33) is opposite to the pipe.

4. A pipe weld grinding apparatus as defined in claim 3, wherein: A sliding groove (34) is formed on the support frame (31) along the radial direction of the fixed pipe, a receiving block (35) is slidably arranged in the sliding groove (34), the rotating shaft of the drive motor (32) penetrates and is rotatably connected to the receiving block (35), and the drive motor (32) is fixed, a drive cylinder (36) is also fixedly arranged on the support frame (31), the telescopic end of the drive cylinder (36) is fixedly connected to the receiving block (35), and the drive cylinder (36) is telescopic along the guide direction of the sliding groove (34).

5. A pipe weld grinding apparatus as defined in claim 3, wherein: An axle (37) is fixedly arranged on the support frame (31), and the sliding block (233) is slidably connected to the axle (37).

6. A pipe weld polishing apparatus as defined in claim 2, wherein: The fixing mechanism (1) comprises a support table (11), the fixing base (21) is arranged on the support table (11), and at least two fixing flanges (12) for fixing pipes are arranged on the support table (11); the fixing flanges (12) are coaxially arranged with the outer track (221).

7. A pipe weld grinding apparatus as defined in claim 6, wherein: A speed reduction motor (13) is fixedly arranged on the support table (11); the rotating shaft of the speed reduction motor (13) is coaxially arranged with the outer track (221); and the rotating shaft of the speed reduction motor (13) is fixedly connected to the fixing base (21).

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