Fixing device for welding girth of combined section of bent pipe of pressure steel pipe

Abstract

The utility model discloses a fixing device for girth welding of a combined section of a bent pipe of a pressure steel pipe, which comprises a first roller carrier trolley which is fixedly arranged, a second roller carrier trolley is arranged on the parallel opposite side of the first roller carrier trolley, and a trolley track is arranged between the first roller carrier trolley and the second roller carrier trolley. Trolley wheels are arranged on the lower side of the second roller carrier trolley and can roll on the trolley track; rollers are arranged at the two ends of the upper table top of the first roller frame trolley and the two ends of the upper table top of the second roller frame trolley, and thrust wheel sets are arranged on the inner sides of the rollers. The device has the advantages of being simple in structure, convenient to disassemble and stable and reliable in work, meanwhile, the service life of the device is greatly prolonged, and the fault rate and the accident rate are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure steel pipe welding in pumped storage power stations, in particular to a fixing device for pressure steel pipe bent pipe combined section ring seam welding. Background Art

[0002] During the production of pressure steel pipes in pumped-storage power stations, during the stacking and circumferential welding of bent pipe sections, due to the shape and structure of the bent pipes, they are prone to movement and deviation when rotating on the roller frame trolley, causing great construction difficulties; at the same time, they may fall from the roller frame trolley and cause safety accidents, so there is a great safety hazard.

[0003] In order to ensure the stability of the subsequent steel pipe during the welding process and ensure construction safety, the stiffening ring on the outside of the pressure steel pipe is generally limited to prevent the pressure steel pipe from shifting during the rotation welding process. At the same time, the steel pipe needs to be effectively supported. However, the existing welding platform does not have a better fixing device during the rotation of the pressure steel pipe bend combination section, which makes the steel pipe prone to positional shift during the subsequent welding process, causing unnecessary trouble. Utility Model Content

[0004] In response to the above problems, the utility model designs a fixing device for welding the ring seam of the combined section of the penstock bend, which has the advantages of simple structure, easy disassembly, smooth operation and reliability. At the same time, it greatly improves the service life of the device and reduces the failure rate and accident rate.

[0005] The technical solution of the present utility model is: a fixing device for welding ring seams of combined joints of pressure steel pipe bends, comprising two roller frame trolleys, namely a first roller frame trolley fixed in place and a second roller frame trolley without a power mechanism, a trolley track is provided between the first roller frame trolley and the second roller frame trolley, a trolley wheel is provided on the lower side of the second roller frame trolley, and the trolley wheel can roll on the trolley track, rollers are provided at both ends of the upper surfaces of the first roller frame trolley and the second roller frame trolley, a thrust wheel group is provided on the inner side of the roller, and the thrust wheel group includes two oppositely arranged thrust wheels, and the two oppositely arranged thrust wheels can just clamp the pipe joint stiffening ring.

[0006] In the aforementioned fixing device for welding the annular seam of the combined section of the penstock bend, the two sets of thrust wheel assemblies on the same roller frame trolley are arranged relatively tilted.

[0007] In the aforementioned fixing device for welding the annular seam of a combined section of a penstock bend, the installation height of the thrust wheel assembly is lower than the installation height of the roller.

[0008] In the aforementioned fixing device for welding the ring seam of the combined section of the penstock bend, the thrust wheel includes a thrust wheel column, a rotating wheel is movably connected to the thrust wheel column, a rotating wheel cover is provided on the upper side of the rotating wheel, and a self-lubricating sliding bearing is provided inside the rotating wheel.

[0009] This utility model secures the pipe segment by clamping the pipe segment stiffening ring with a thrust wheel assembly. The fixed first roller frame trolley keeps the relative position of the pipe segment unchanged, while the stiffening ring plane and the annular seam plane are not aligned. When the rollers on the roller frame trolley rotate the pipe segment, the second roller frame trolley moves back and forth as the position of the stiffening ring changes. The thrust wheels and rollers always support the pipe segment. At the same time, the plane where the pipe segment meets the annular seam remains stable, significantly reducing the risk of failure and accidents.

[0010] Furthermore, the thrust wheel adopts a self-lubricating sliding bearing inside and is provided with a runner cover on the upper side, which is convenient for installation and maintenance, and has the advantages of stable, reliable and durable operation.

[0011] In summary, the utility model has the advantages of simple structure, easy disassembly, stable operation and reliability, while greatly improving the service life of the device and reducing the failure rate and accident rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a side structural schematic diagram of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the thrust wheel of the utility model when it is working;

[0015] Figure 4 This is a schematic diagram of the internal structure of the thrust wheel of the utility model;

[0016] The markings in the accompanying drawings are: 1. first roller frame trolley; 10. trolley track; 2. second roller frame trolley; 21. trolley wheel; 3. roller; 4. thrust wheel group; 40. thrust wheel; 41. thrust wheel column; 42. rotating wheel; 43. rotating wheel cover; 44. self-lubricating sliding bearing. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be further specifically described below through embodiments and in conjunction with the accompanying drawings, but they are not intended to limit the present invention.

[0018] Example

[0019] Fixing device for welding the joint ring seam of penstock bend, such as Figure 1-4As shown, it includes a fixed first roller frame trolley 1, a second roller frame trolley 2 is provided on the parallel opposite side of the first roller frame trolley 1, a trolley track 10 is provided between the first roller frame trolley 1 and the second roller frame trolley 2, and a trolley wheel 21 is provided on the lower side of the second roller frame trolley 2. The trolley wheel 21 can roll on the trolley track 10, and no power mechanism is provided on the lower side of the second roller frame trolley 2.

[0020] Rollers 3 are provided at both ends of the upper surfaces of the first roller frame trolley 1 and the second roller frame trolley 2 , and thrust wheel groups 4 are provided on the inner sides of the rollers 3 .

[0021] The installation height of the thrust wheel assembly 4 is lower than that of the roller 3, so that the thrust wheel assembly 4 can clamp against the pipe segment stiffening ring J, while the roller 3 can press against the penstock elbow assembly segment.

[0022] The two sets of thrust wheel assemblies 4 on the first roller frame trolley 1 are relatively tilted; the two sets of thrust wheel assemblies 4 on the second roller frame trolley 2 are also relatively tilted, and the tilt angle θ is 50°-70°.

[0023] The thrust wheel 40 includes a thrust wheel column 41 , a rotating wheel 42 is movably connected to the thrust wheel column 41 , a rotating wheel cover 43 is provided on the upper side of the rotating wheel 42 , and a self-lubricating sliding bearing 44 is provided in the rotating wheel 42 .

[0024] After the single-section elbow is welded with the stiffening ring, it must first be stacked and paired, and the two elbow sections must be paired into a large combined section. The stacked combined section is then transported to the girth welding area for girth welding. When the pressure steel pipe elbow combined section is pushed, the pressure steel pipe elbow combined section rotates under the drive of the roller 3. The first roller frame trolley 1 keeps the relative position of the elbow section unchanged, and the second roller frame trolley 2 moves back and forth with the change of the stiffening ring position. The thrust wheel 40 and the roller 3 always support the elbow section, and at the same time make the girth plane of the elbow combined section stable and perpendicular to the ground. This provides a prerequisite for using submerged arc automatic welding instead of manual welding for girth welding.

Claims

1. A fixing device for welding the girth seam of a combined section of a penstock bend, characterized by: The invention comprises a first roller frame trolley (1) which is fixedly arranged, a second roller frame trolley (2) being provided on the parallel opposite side of the first roller frame trolley (1), a trolley track (10) being provided between the first roller frame trolley (1) and the second roller frame trolley (2), a trolley wheel (21) being provided on the lower side of the second roller frame trolley (2), and the trolley wheel (21) being capable of rolling on the trolley track (10); rollers (3) are provided at both ends of the upper surface of the first roller frame trolley (1) and the second roller frame trolley (2), and a thrust wheel group (4) is provided on the inner side of the roller (3).

2. The fixing device for welding girth seams of combined sections of penstock elbows according to claim 1 is characterized in that: No power mechanism is provided on the lower side of the second roller frame trolley (2).

3. The fixing device for welding girth seams of combined sections of penstock elbows according to claim 1 is characterized in that: The two sets of thrust wheel assemblies (4) on the first roller frame trolley (1) are arranged at an angle relative to each other; and the two sets of thrust wheel assemblies (4) on the second roller frame trolley (2) are arranged at an angle relative to each other.

4. The fixing device for welding girth seams of combined sections of penstock elbows according to claim 1 is characterized in that: The installation height of the thrust wheel set (4) is lower than the installation height of the roller (3).

5. The fixing device for welding girth seams of combined sections of penstock elbows according to claim 1 is characterized in that: The thrust wheel assembly (4) comprises two thrust wheels (40) arranged opposite to each other.

6. The fixing device for welding girth seams of combined sections of penstock elbows according to claim 5, characterized in that: The thrust wheel (40) comprises a thrust wheel column (41), a rotating wheel (42) is movably connected to the thrust wheel column (41), and a rotating wheel cover (43) is provided on the upper side of the rotating wheel (42).

7. The fixing device for welding girth seams of combined sections of penstock elbows according to claim 6, characterized in that: A self-lubricating sliding bearing (44) is provided in the rotating wheel (42).

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