Steel pipe roundness supporting device

Abstract

The utility model relates to a steel pipe roundness supporting device which comprises an axial center frame, walking supporting legs and a fixing disc which are installed at the two ends of the axial center frame, the fixing disc is fixedly installed on the axial center frame, a sliding cavity which is arranged in the radial direction is formed in the periphery of the fixing disc, and a sliding groove is formed in the rear side wall of the sliding cavity. The supporting arm comprises a supporting head and a supporting arm, the lower end of the supporting arm is installed in the sliding cavity, and a first pin shaft is arranged on the back of the supporting arm; the sliding disc is arranged on the rear side of the fixed disc and is in sliding fit with the axial center frame, and a plurality of second pin shafts which are circumferentially arranged are arranged on the surface of the sliding disc; one end of the driving rod is hinged with the first pin shaft, and the other end is hinged with the second pin shaft; the driving assembly is arranged on the back of the sliding disc and used for driving the sliding disc to move front and back. The sliding disc and the hinged driving rod are adopted to push all the supporting arms to synchronously stretch out or retract, mechanical synchronous control replaces electric synchronous control, reliability is better, energy consumption is reduced, and cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of large steel pipe construction technology, specifically relating to a steel pipe roundness support device. Background Technology

[0002] In the metallurgical industry, butt welding of pipes is a common practice. For thin-walled steel pipes with larger diameters, which are usually rolled using a plate rolling machine, the roundness may be slightly off. Adjustments are needed during butt welding to ensure that the end faces of the two steel pipes are completely aligned before proceeding to the next welding step.

[0003] When welding steel pipes, horizontal fixing is often used. After aligning the pipe ends, welding is performed along the circumference. Because the steel pipe plates are relatively thin, they are prone to deformation during transportation and movement. After horizontally butt-jointing the steel pipes, it is often found that the top of the pipe end sinks or bends locally. This not only causes the roundness of the steel pipe to be too large, but also makes the steel pipes on both sides of the butt joint misaligned, making welding impossible.

[0004] To address steel pipe deformation, existing solutions involve installing cross braces inside the pipe to support the pipe openings and perform some deformation repairs. See Chinese patents 201210246490.4 and 202010398026.1, both of which can restore the roundness of deformed steel pipes to a certain extent. However, they have some drawbacks: 1) Each support arm requires an individually adjustable extension structure, with studs or hydraulic cylinders controlling the extension and retraction of each arm one-to-one. While patent 202010398026.1 uses synchronously adjustable hydraulic cylinders to achieve synchronized extension and retraction, the cost of equipping each support arm with a hydraulic cylinder is high. 2) Each support arm provides point support to the inner wall of the steel pipe, resulting in a small contact area between the support position and the pipe. For thin-walled steel pipes, this easily leads to the pipe being deformed into a polygonal shape. Utility Model Content

[0005] This invention addresses the problems in the prior art by providing a low-cost steel pipe support device that allows for simultaneous adjustment of the length of each support arm.

[0006] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0007] A steel pipe roundness support device includes an axial center frame, with traveling legs installed at both ends of the axial center frame, and further includes:

[0008] The fixed plate is fixedly installed on the axial center frame. The outer periphery of the fixed plate is provided with radially arranged sliding cavities, and the rear side wall of the sliding cavity is provided with a sliding groove.

[0009] The support arm includes a support head and a support arm. The lower end of the support arm is installed in a sliding cavity, and a first pin is provided on the back of the support arm.

[0010] A sliding disc is located behind the fixed disc and slides in cooperation with the axial center frame. Its surface is provided with several circumferentially arranged second pins.

[0011] The drive rod is hinged at one end to the first pin and at the other end to the second pin.

[0012] The drive component, located on the back of the sliding disk, is used to drive the sliding disk to move back and forth.

[0013] Compared with the prior art, the advantages of this utility model with the above structure are:

[0014] This invention uses a sliding disc and a hinged drive rod to push each support arm to extend or retract synchronously, replacing electrical synchronous control with mechanical synchronous control, which is more reliable, saves energy, and has a lower cost.

[0015] As a preferred option, a further technical solution to the above structure is:

[0016] The fixed plate includes a front side plate and a rear side plate. The sliding cavity is composed of two U-shaped grooves arranged opposite each other. The two U-shaped grooves are located between the front side plate and the rear side plate and are welded and fixed to the front side plate and the rear side plate. The sliding groove is a through hole made on the rear side plate along the gap between the two U-shaped grooves.

[0017] The direct beneficial effect of the above features is that the fixed plate, which serves as the assembly base for each support arm in this embodiment, has high strength and can effectively stabilize the movement of all support arms.

[0018] The support head includes a support terminal, with end support rods connected to both ends of the support terminal. The lower ends of the two end support rods are fixedly connected to the connecting plate. The connecting plate has a center hole in the center, and a middle support rod is connected to the middle of the support terminal. The support terminal is arc-shaped.

[0019] The direct beneficial effect of the above features is that the large contact area between the arc-shaped support terminal and the inner wall of the pipe in this example avoids obvious angles in thin-walled pipes and improves the roundness of the pipe.

[0020] The support terminal is a rubber rod, and the end support rod is pinned to the support terminal; the upper end of the middle support rod is pinned to the support terminal, and the lower end of the middle support rod is threaded and passes through the center hole of the connecting plate. An adjusting nut that is threaded to the middle support rod is provided on the upper side of the connecting plate.

[0021] The direct beneficial effect of the above features is that, in this embodiment, the extension and retraction of the middle support rod can be achieved through the thread and adjusting nut. The extension and retraction of the middle support rod can change the curvature of the support terminal, thereby making the support terminal suitable for large pipes of different diameters.

[0022] The support arm includes two sliding rods, the top ends of which are fixedly connected by a connecting plate. A hinge support is fixed to the back side of the middle of the two sliding rods, and an ear seat is vertically fixed to the back side of the hinge support. A first pin is installed on the ear seat.

[0023] The direct beneficial effect of the above features is that the double-strut structure in this example has high strength, effectively supports the strut head, and is not easily deformed when exerting force.

[0024] Two support heads are installed at the outer end of one outrigger. The two support heads are arranged side by side, with the inner support head abutting against the inner wall of the left steel pipe and the outer support head abutting against the inner wall of the right steel pipe.

[0025] The direct beneficial effect of the above features is that this example can support the pipes on both sides of the weld simultaneously, and the two pipes can achieve end-to-end alignment more quickly.

[0026] The outer edge of the front surface of the sliding disk is provided with a groove, in which a second pin is installed. The bottom of the groove is an arc-shaped concave surface. The end of the drive rod is fixed to a shaft tube, which is movably fitted onto the second pin. The outer surface of the shaft tube abuts against the bottom of the groove.

[0027] The direct beneficial effect of the above features is that the sliding disk in this example not only pushes the drive rod through the second pin, but also pushes the rear end of the drive rod through the groove, which reduces the pressure on the second pin and makes it less prone to damage.

[0028] The drive assembly includes cylinders mounted symmetrically on both sides of the axial center frame, with the piston end of the cylinder connected to the back of the sliding disc.

[0029] The direct beneficial effect of the above features is that two cylinders drive multiple support arms, resulting in low cost, while the output power is sufficient to meet the requirements of thin-walled steel pipes. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a structural diagram of the fixed disk of this utility model;

[0032] Figure 3 This is an exploded view of the support arm structure of this utility model;

[0033] Figure 4 This is an assembly structure diagram of the sliding disk and drive rod of this utility model;

[0034] Figure 5 This is a structural diagram of the connection between the drive rod and the hinge support of this utility model.

[0035] In the diagram: 1. Traveling leg; 2. Axial center frame; 3. Support arm; 301. Support terminal; 302. Middle support rod; 303. End support rod; 304. Connecting plate; 305. Center hole; 306. Slide rod; 307. Hinge support; 308. Ear seat; 309. Adjusting nut; 4. Fixed plate; 401. Front side plate; 402. Rear side plate; 403. Sliding cavity; 404. U-shaped groove; 405. Slide groove; 5. Drive rod; 501. Shaft tube; 6. Sliding plate; 601. Groove; 7. Drive assembly; 8. Second pin; 9. First pin. Detailed Implementation

[0036] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0037] This utility model is aimed at steel pipes that require roundness support and adjustment. The steel pipe can be a pipe with a diameter of 600mm to 800mm and a wall thickness of about 50mm.

[0038] See Figure 1 The present invention provides a steel pipe roundness support device, including an axial center frame 2, with traveling legs 1 installed at both ends of the axial center frame 2, and further including:

[0039] The fixed disk 4 is fixedly installed on the axial center frame 2. The outer periphery of the fixed disk 4 is provided with a radially arranged sliding cavity 403, and the rear side wall of the sliding cavity 403 is provided with a sliding groove 405.

[0040] The support arm 3 includes a support head and a support arm. The lower end of the support arm is installed in the sliding cavity 403, and a first pin 9 is provided on the back of the support arm.

[0041] The sliding disk 6 is located behind the fixed disk 4 and is slidably connected to the axial center frame 2. Its surface is provided with several circumferentially arranged second pins 8.

[0042] The drive rod 5 is hinged at one end to the first pin 9 and at the other end to the second pin 8;

[0043] The drive component 7 is located on the back of the sliding disk 6 and is used to drive the sliding disk 6 to move back and forth.

[0044] See Figure 2The fixed plate 4 includes a front side plate 401 and a rear side plate 402. The sliding cavity 403 is composed of two U-shaped grooves 404 arranged opposite each other. The two U-shaped grooves 404 are located between the front side plate 401 and the rear side plate 402 and are welded and fixed to the front side plate 401 and the rear side plate 402. The sliding groove 405 is a through hole made on the rear side plate 402 along the gap between the two U-shaped grooves 404. The fixed plate 4 provides a stable base for the sliding and telescopic movement of each support arm 3. The two steel plates provide overall support, and the U-shaped grooves 404 form a slide rail to ensure the radial movement of the support arm 3. The strength of the fixed plate 4 ensures the stability of the support arm 3.

[0045] See Figure 3 The support head includes a support terminal 301, with end support rods 303 connected to both ends of the support terminal 301. The lower ends of the two end support rods 303 are fixedly connected by a connecting plate 304. A middle support rod 302 is connected in the middle of the support terminal 301. The support terminal 301 is arc-shaped. The arc-shaped support terminal 301 has a large contact area with the inner wall of the pipe, which avoids obvious angles in thin-walled pipes and improves the roundness of the pipe.

[0046] Furthermore, the support terminal 301 is a rubber rod, and the end support rod 303 is pinned to the support terminal 301; the upper end of the middle support rod 302 is pinned to the support terminal 301, and the lower end of the middle support rod 302 is provided with a thread and passes through the center hole 305 of the connecting plate 304. The upper side of the connecting plate 304 is provided with an adjusting nut 309 that is threadedly connected to the middle support rod 302.

[0047] This utility model uses rubber rods to support the inner wall of a steel pipe. First, the rubber rods are flexible and are less likely to damage the steel pipe when in contact with its inner wall, thus further protecting the steel pipe's safety compared to existing rod supports. Second, the rubber rods have a certain deformation capacity, and through three-point support, an arc is defined, allowing the curvature to be adjusted according to the diameter of the supported steel pipe, thereby accommodating large pipes of different diameters. In this design, the extension and retraction of the middle support rod 302 is conveniently achieved through threads and adjusting nuts 309.

[0048] See Figure 3 The support arm includes two sliding rods 306, the top ends of which are fixedly connected by a connecting plate 304. A hinge support 307 is fixed to the back side of the middle of the two sliding rods 306, and an ear seat 308 is vertically fixed to the back side of the hinge support 307. A first pin 9 is installed on the ear seat 308. The double support rod structure has high strength and can slide against the side walls of the two U-shaped grooves 404 respectively, so that the two sides of the support arm are pressed against the sliding grooves 405, effectively supporting the support head. It is not easy to deform during force support and the sliding shape is stable. The gap between the two support arms can avoid the middle support rod 302, so that the middle support rod 302 can pass through to the lower side of the connecting plate 304. The first connecting plate 304 and the second connecting plate 304 can be the same steel plate. The two-plate structure facilitates the separate prefabrication of the support head and the support arm.

[0049] As a variation of this utility model (not shown in the embodiment), two support heads are installed at the outer end of a support arm. The two support heads are arranged side by side, with the inner support head abutting against the inner wall of the left steel pipe and the outer support head abutting against the inner wall of the right steel pipe. This example can support the pipes on both sides of the weld at the same time, and the two pipes can achieve end alignment more quickly.

[0050] See Figure 4 , Figure 5 The outer edge of the front surface of the sliding disk 6 is provided with a groove 601, in which a second pin 8 is installed. The bottom of the groove 601 is an arc-shaped concave surface. The end of the drive rod 5 is fixedly connected to the shaft tube 501, which is movably fitted on the second pin 8. The outer surface of the shaft tube 501 abuts against the bottom of the groove 601. The sliding disk 6 not only pushes the drive rod 5 through the second pin 8, but also pushes the rear end of the drive rod 5 through the groove 601, which reduces the pressure on the second pin 8 and makes it less prone to damage.

[0051] The drive assembly 7 includes cylinders mounted symmetrically on both sides of the axial center frame 2. The piston end of the cylinder is connected to the back of the sliding disc 6. The two cylinders drive multiple support arms 3. The cost is low, and the output can fully meet the requirements for thin-walled steel pipes.

[0052] This invention uses a sliding disc and a hinged drive rod to synchronously drive each support arm to extend or retract synchronously, replacing electrical synchronous control with mechanical synchronous control, which results in better reliability, energy saving, and lower cost.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A steel pipe roundness support device, comprising an axial center frame (2), with traveling legs (1) installed at both ends of the axial center frame (2), characterized in that, Also includes: The fixed disk (4) is fixedly installed on the axial center frame (2). The outer periphery of the fixed disk (4) is provided with a radially arranged sliding cavity (403), and the rear side wall of the sliding cavity (403) is provided with a sliding groove (405). The support arm (3) includes a support head and a support arm. The lower end of the support arm is installed in the sliding cavity (403), and a first pin (9) is provided on the back of the support arm. The sliding disk (6) is located behind the fixed disk (4) and slides in cooperation with the axial center frame (2). Its surface is provided with several circumferentially arranged second pins (8). The drive rod (5) is hinged at one end to the first pin (9) and at the other end to the second pin (8); The drive component (7) is located on the back of the sliding disk (6) and is used to drive the sliding disk (6) to move back and forth.

2. The steel pipe roundness support device according to claim 1, characterized in that, The fixed plate (4) includes a front side plate (401) and a rear side plate (402). The sliding cavity (403) is composed of two U-shaped grooves (404) arranged opposite to each other. The two U-shaped grooves (404) are located between the front side plate (401) and the rear side plate (402) and are welded and fixed to the front side plate (401) and the rear side plate (402). The sliding groove (405) is a through hole opened on the rear side plate (402) along the gap between the two U-shaped grooves (404).

3. The steel pipe roundness support device according to claim 1, characterized in that, The support head includes a support terminal (301), with end support rods (303) connected to both ends of the support terminal (301). The lower ends of the two end support rods (303) are fixedly connected to the connecting plate (304). The connecting plate (304) has a center hole (305) in the center. A middle support rod (302) is connected in the middle of the support terminal (301). The support terminal (301) is arc-shaped.

4. The steel pipe roundness support device according to claim 3, characterized in that, The support terminal (301) is a rubber rod, and the end support rod (303) is pinned to the support terminal (301); the upper end of the middle support rod (302) is pinned to the support terminal (301), and the lower end of the middle support rod (302) is provided with a thread and passes through the center hole (305) of the connecting plate (304). The upper side of the connecting plate (304) is provided with an adjusting nut (309) that is threadedly connected to the middle support rod (302).

5. The steel pipe roundness support device according to claim 1, characterized in that, The arm includes two slide rods (306), the top ends of the two slide rods (306) are fixedly connected by a connecting plate (304), a hinge support (307) is fixed on the back side of the middle of the two slide rods (306), and an ear seat (308) is vertically fixed on the back side of the hinge support (307), and a first pin (9) is installed on the ear seat (308).

6. The steel pipe roundness support device according to claim 1, characterized in that, Two support heads are installed at the outer end of one outrigger. The two support heads are arranged side by side, with the inner support head abutting against the inner wall of the left steel pipe and the outer support head abutting against the inner wall of the right steel pipe.

7. The steel pipe roundness support device according to claim 1, characterized in that, The outer edge of the front surface of the sliding disk (6) is provided with a groove (601), and a second pin (8) is installed in the groove (601). The bottom of the groove (601) is an arc-shaped concave surface. The end of the drive rod (5) is fixed to the shaft tube (501), and the shaft tube (501) is movably mounted on the second pin (8). The outer surface of the shaft tube (501) abuts against the bottom of the groove (601).

8. The steel pipe roundness support device according to claim 1, characterized in that, The drive assembly (7) includes cylinders mounted on both sides of the axial center frame (2), with the piston end of the cylinder connected to the back of the sliding disc (6).

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