Rotary platform for quickly welding stiffening ring of pressure steel pipe

Abstract

The utility model relates to the technical field of welding auxiliary devices, and provides a rotating platform for quickly welding a stiffening ring of a pressure steel pipe. The pressure steel pipe is fixed to the center of the upper rack through at least three limiting and fixing devices arranged along the center of the upper rack in an equidistant circumferential array mode, the upper rack and the bearing rotary disc are coaxial, and therefore the pressure steel pipe is arranged in the center of the bearing rotary disc, and the limiting and fixing devices rotate lead screws through rotating rods to drive clamping blocks to move. The clamping blocks abut against the outer wall of the pressure steel pipe so that the pressure steel pipe can be fixed, the connecting blocks are arranged at the tops of the clamping blocks, the tops of the connecting blocks are fixedly connected with the graduated scale, the moving distance of the clamping blocks can be judged through the graduated scale, the limiting distances of the three limiting and fixing devices can be rapidly unified, and the positioning time is greatly shortened. In the rapid welding process of the stiffening ring, the speed can be adjusted through the excitation motor, a plurality of welding trolleys conduct welding at the same time, hoisting only needs to be conducted once in the welding process, and the welding efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding auxiliary device technical field especially a kind of rotary platform of pressure steel pipe stiffening ring rapid welding. BACKGROUND

[0002] Pressure steel pipe is steel pipeline for conveying great water pressure water flow, and is widely used in water conservancy projects. In order to enhance the pressure capacity and structural strength of pressure steel pipe, stiffening ring is usually arranged on the outer wall of pressure steel pipe. At present, the stiffening ring is generally fixed on the outer wall of pressure steel pipe by welding. The current welding method generally selects CO2 gas shielded welding and submerged arc welding, etc. During welding, an inclined welding rounding frame is used to realize the welding of stiffening ring fillet weld. In order to achieve the purpose, the pressure steel pipe needs to be hoisted into an inclined state and placed on the rounding frame. The hoisting and adjusting process needs to spend a lot of time and requires more equipment and resources.

[0003] In the prior art, the utility model with the application number of 201220320389.4 proposes a pressure steel pipe stiffening ring rotary welding platform, which comprises an excitation motor, a reverse gearbox, a transmission pinion, a heavy load gear, a heavy load connecting I-beam, a limiting block, a heavy load turntable and a heavy load turntable fixing I-beam. The rotating shaft of the excitation motor is connected with the input shaft of the reverse gearbox through a coupling. The output shaft of the reverse gearbox is connected with the center shaft of the transmission pinion. The transmission pinion is engaged with the heavy load gear. The heavy load gear is fixedly installed on the heavy load connecting I-beam. The limiting block is installed on the upper surface of the heavy load gear. The heavy load connecting I-beam is installed on the upper surface of the heavy load turntable. The heavy load turntable is installed on the upper surface of the heavy load turntable fixing I-beam. During use, the pressure steel pipe is placed on the heavy load gear and limited by the limiting block. The heavy load gear is rotated by the excitation motor to realize the quantitative rotation of the pressure steel pipe, which greatly reduces the labor cost and improves the efficiency. However, the following problems exist in the actual use of the patent: in order to ensure the welding quality, the pressure steel pipe needs to be placed as much as possible in the center of the heavy load turntable. During adjustment and positioning, there is no corresponding auxiliary mechanism, and only manual measurement and marking can be used, which is complicated and has poor positioning effect. Only one welding station is provided, and the welding efficiency is low.

[0004] Therefore, it is urgent to develop a pressure steel pipe stiffening ring rapid welding rotary platform to overcome the shortcomings of the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings of the prior art and providing a pressure steel pipe stiffening ring rapid welding rotary platform to improve the welding efficiency and save construction time.

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

[0007] A rotating platform for rapid welding of stiffening rings for penstocks comprises a lower frame fixed to a concrete top, a load-bearing turntable with its bottom fixed to the top of the lower frame, an upper frame fixed to the top of the load-bearing turntable, at least three position-limiting fixing devices arranged in an array of equidistant circles along the center of the upper frame, a driving device for driving the upper frame to rotate, and a fixing plate provided on the outer side of the upper frame; the upper frame and the load-bearing turntable are coaxial; a plurality of support plates are provided on the side of the fixing plate close to the upper frame, and welding stations are provided on the support plates;

[0008] The limiting fixing device includes: a first fixed block, a second fixed block, a screw rod, a clamping block, a connecting block, a rotating rod, and a scale. The first fixed block and the second fixed block are fixed to the top of the upper frame. The first fixed block and the second fixed block are provided with threaded holes penetrating therethrough, and a screw rod is sleeved in the threaded hole. The screw rod passes through one end of the first fixed block and is fixedly connected to the clamping block. The screw rod passes through one end of the second fixed block and is fixedly connected to the rotating rod. The top of the clamping block is fixedly connected to the connecting block, and the top of the connecting block is fixedly connected to the scale.

[0009] Preferably, a transmission tooth is provided on the outer side of the upper frame, and the transmission tooth is cooperatively connected with the driving device.

[0010] Preferably, the driving device includes: a transmission pinion, a gearbox, a coupling, and an excitation motor. The output shaft of the excitation motor is connected to the gearbox input shaft through a coupling. The gearbox output shaft is connected to the center shaft of the transmission pinion. The transmission pinion is engaged with the transmission teeth provided on the outside of the upper frame. The excitation motor and the gearbox are fixed to the top of the concrete by embedded anchor hooks.

[0011] Preferably, a stiffening plate is provided at the bottom of the support plate, and a welding carriage is placed on the support plate.

[0012] Preferably, the top surface, front side surface and rear side surface of the scale are all provided with the same scale.

[0013] Preferably, the position limiting and fixing device is provided with a slag blocking block above the screw rod.

[0014] Preferably, the lower frame and the fixing plate are fixed to the top of the concrete by pre-buried anchor hooks.

[0015] The utility model discloses a rotating platform for rapid welding of stiffening rings of penstocks, which has the following beneficial effects.

[0016] Firstly, the device of the utility model fixes the pressure steel pipe at the center of the upper frame by means of at least three limiting fixing devices arranged in an equidistant circular array along the center of the upper frame, and the upper frame is coaxial with the load-bearing turntable, thereby placing the pressure steel pipe at the center of the load-bearing turntable, and the limiting fixing device drives the clamping block to move by rotating the screw rod, and the outer wall of the pressure steel pipe is supported by the clamping block to fix the pressure steel pipe, and a connecting block is provided on the top of the clamping block, and the top of the connecting block is fixedly connected to the scale, and the moving distance of the clamping block can be judged by the scale, so that the limiting distances of the three limiting fixing devices can be quickly unified, thereby greatly reducing the positioning time.

[0017] Secondly, during the rapid welding of the stiffening ring, the utility model can rely on the excitation motor to adjust the speed and control the speed of the welding process. Multiple welding carriages can perform welding at the same time. During the process, only one hoisting is required to achieve complete stiffening ring corner weld welding, and the welding efficiency is high.

[0018] Third, the utility model has the advantages of low cost, high reliability, small size, simple operation, and convenient installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0020] Figure 2 for Figure 1 Schematic diagram of the cross-section structure of section AA.

[0021] Figure 3 for Figure 1 A partial enlarged schematic diagram of point B in the middle.

[0022] Figure 4 for Figure 2 A partial enlarged schematic diagram of point C in the middle.

[0023] In the attached figure: 1. Lower frame; 2. Load-bearing turntable; 3. Upper frame; 4. Limit fixing device; 41. First fixing block; 42. Second fixing block; 43. Screw; 44. Clamping block; 45. Connecting block; 46. Scale; 47. Slag block; 48. Rotating rod; 5. Driving device; 51. Transmission pinion; 52. Gearbox; 53. Coupling; 54. Excitation motor; 6. Fixed plate; 61. Support plate; 62. Stiffening plate; 7. Welding trolley; 8. Penstock; 81. Stiffening ring; 9. Embedded anchor hook; 10. Concrete. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. Example

[0026] The utility model discloses a rotating platform for rapid welding of stiffening rings of penstocks, which is used for welding stiffening rings of penstocks.

[0027] Reference Figure 1 A rotating platform for rapid welding of stiffening rings of penstocks comprises a lower frame 1 fixed to the top of a concrete 10, a load-bearing turntable 2 whose bottom is welded to the top of the lower frame 1, an upper frame 3 welded to the top of the load-bearing turntable 2, four position-limiting fixing devices 4 arranged in an equidistant circular array along the center of the upper frame 3, a driving device 5 for driving the upper frame 3 to rotate, and a fixing plate 6 arranged on the outside of the upper frame 3; specifically, the lower frame 1 serves as the main load-bearing component, and the bottom of the lower frame 1 is welded and fixed to the embedded anchor hook 9. After welding is completed, the embedded anchor hook 9 is cast in the concrete 10. For the convenience of construction, the embedded anchor hook 9 can also be cast in the concrete 10 before welding. The upper frame 3 is coaxial with the load-bearing turntable 2 and rotates based on the load-bearing turntable 2. The driving device 5 drives the upper frame 3 to rotate, thereby driving the pressure steel pipe 8 above to rotate. The limiting fixture 4 is welded to the top surface of the upper frame 3. The span between the four limiting fixtures 4 is 90°, ensuring that the pressure steel pipe 8 is always placed in the center of the load-bearing turntable 2, avoiding vibration and slippage of the pressure steel pipe 8 under the action of centrifugal force, which affects welding.

[0028] like Figure 2 As shown, the upper frame 3 is provided with transmission teeth on the outside, which mesh with the drive unit 5. The drive unit 5 includes a transmission pinion 51, a gearbox 52, a coupling 53, and an excitation motor 54. The output shaft of the excitation motor 54 is connected to the input shaft of the gearbox 52 via the coupling 53. The output shaft of the gearbox 52 is connected to the central axis of the transmission pinion 51. The transmission pinion 51 meshes with the transmission teeth on the outside of the upper frame 3. The excitation motor 54 and the bottom of the gearbox 52 are also welded to the embedded anchor hook 9. After welding, the embedded anchor hook 9 is cast in concrete 10. For ease of construction, the embedded anchor hook 9 can also be cast in concrete 10 before welding. The excitation motor 54 can be speed-adjusted to control the speed of rotation of the penstock 8 during the welding process. To save material, a weight-reducing groove can be provided in the upper frame 3. However, the weight-reducing groove should not affect the structural strength of the upper frame 3 to prevent the penstock 8 from tipping over and injuring people during rotational welding.

[0029] Specifically, such as Figure 2 and Figure 3 As shown, the limiting fixing device 4 includes: a first fixing block 41, a second fixing block 42, a screw rod 43, a clamping block 44, a connecting block 45, a rotating rod 48, and a scale 46. The first fixing block 41 and the second fixing block 42 are welded to the top of the upper frame 3. The first fixing block 41 and the second fixing block 42 are provided with a threaded hole through which a screw rod 43 is sleeved. The outer side of the screw rod 43 is provided with a thread that matches the threaded hole. The screw rod 43 passes through one end of the first fixing block 41 and is fixedly connected to the clamping block 44. The screw rod 43 passes through one end of the second fixing block 42 and is fixedly connected to the rotating rod 48. The top of the clamping block 44 is fixed to the The connecting block 45 is fixedly connected, and the top of the connecting block 45 is fixedly connected to the scale 46. In this embodiment, the length of the clamping block 44 is 15 mm, the thickness of the connecting block 45 is 5 mm, the end of the connecting block 45 is aligned with the end of the clamping block 44, and the distance that the clamping block 44 moves inward is the length of the clamping block 44 minus the thickness of the connecting block 45 plus the reading from the scale 46 to the first fixed block 41. Since the four limiting fixtures 4 are arranged in an equidistant circular array along the center of the upper frame 3, it is only necessary to adjust the scales of the four limiting fixtures 4 to the same to ensure that the clamping block 44 always places the pressure steel pipe 8 in the center of the load-bearing turntable 2.

[0030] Embedded iron parts are welded to the bottom of the fixed plate 6, and the bottom of the embedded iron parts is welded to the embedded anchor hooks 9. After the same welding is completed, the embedded iron parts and the embedded anchor hooks 9 are poured in the concrete 10. Three support plates 61 are welded to the side of the fixed plate 6 close to the upper frame 3. The distance between the support plates 61 is determined according to the spacing of the stiffening plates 62. The distance between the support plates 61 can ensure that the workers can perform welding. A welding station is provided on the support plate 61, and a safety rope buckle is also provided on the support plate 61 to prevent the welding trolley 7 and the operator from falling.

[0031] like Figure 3 and Figure 4 As shown, the top, front, and rear sides of the scale 46 are all provided with identical scales, which facilitates adjustment of the position of the clamping block 44. Workers can read the scale from multiple positions, which is very convenient. During production, it is only necessary to weld three identical scales to the top, front, and rear sides of a steel plate. To prevent welding slag from falling onto the screw 43 during welding, a slag stopper 47 is provided above the screw 43, at a location where welding slag is likely to fall, that is, between the first and second fixed blocks 41, 42. The slag stopper 47 is welded between the first and second fixed blocks 41, 42.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Replacements may include partial structures, devices, method steps, or complete technical solutions. Equivalent replacements or modifications based on the technical solution and its concept of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A rotating platform for rapid welding of stiffening rings of penstocks, characterized in that: The invention comprises a lower frame (1) fixed on the top of concrete (10), a load-bearing turntable (2) with its bottom fixed on the top of the lower frame (1), an upper frame (3) fixed on the top of the load-bearing turntable (2), at least three position-limiting fixing devices (4) arranged in an array along a central equidistant circle of the upper frame (3), a driving device (5) for driving the upper frame (3) to rotate, and a fixing plate (6) provided on the outer side of the upper frame (3); the upper frame (3) and the load-bearing turntable (2) are coaxial; a plurality of support plates (61) are provided on one side of the fixing plate (6) close to the upper frame (3), and a welding station is provided on the support plate (61); The position limiting fixing device (4) comprises: a first fixing block (41), a second fixing block (42), a screw rod (43), a clamping block (44), a connecting block (45), a rotating rod (48), and a scale (46). The first fixing block (41) and the second fixing block (42) are fixed to the top of the upper frame (3). The first fixing block (41) and the second fixing block (42) are provided with threaded holes penetrating therethrough. The screw rod (43) is sleeved in the threaded hole. The screw rod (43) passes through one end of the first fixing block (41) and is fixedly connected to the clamping block (44). The screw rod (43) passes through one end of the second fixing block (42) and is fixedly connected to the rotating rod (48). The top of the clamping block (44) is fixedly connected to the connecting block (45). The top of the connecting block (45) is fixedly connected to the scale (46).

2. The rotating platform for rapid welding of stiffening rings of penstocks according to claim 1, characterized in that: Transmission teeth are provided on the outside of the upper frame (3), and the transmission teeth are cooperatively connected with the driving device (5).

3. The rotating platform for rapid welding of stiffening rings of penstocks according to claim 2, characterized in that: The driving device (5) includes: a transmission pinion (51), a gearbox (52), a coupling (53), and an excitation motor (54). The output shaft of the excitation motor (54) is connected to the input shaft of the gearbox (52) through the coupling (53). The output shaft of the gearbox (52) is connected to the central shaft of the transmission pinion (51). The transmission pinion (51) is engaged with a transmission tooth provided on the outer side of the upper frame (3). The excitation motor (54) and the gearbox (52) are fixed to the top of the concrete (10) through a pre-buried anchor hook (9).

4. The rotating platform for rapid welding of stiffening rings of penstocks according to claim 1, characterized in that: A stiffening plate (62) is provided at the bottom of the support plate (61), and a welding carriage (7) is placed on the support plate (61).

5. The rotating platform for rapid welding of stiffening rings of penstocks according to claim 1, characterized in that: The top surface, front side surface and rear side surface of the scale (46) are all provided with the same scale.

6. The rotating platform for rapid welding of stiffening rings of penstocks according to claim 1, characterized in that: The position limiting and fixing device (4) is provided with a slag blocking block (47) above the screw rod (43).

7. The rotating platform for rapid welding of stiffening rings of penstocks according to claim 1, characterized in that: The lower frame (1) and the fixing plate (6) are fixed to the top of the concrete (10) via pre-buried anchor hooks (9).

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