A large-scale horizontal automatic rounding device for pressure steel pipes

Abstract

The present invention discloses a large-scale horizontal automatic rounding device for pressure steel pipes, comprising a fixed frame, a mobile frame and two turning frames symmetrically arranged on the mobile frame and the fixed frame; the fixed frame is fixed to the ground, and the mobile frame is provided with a walking device which can move along a track to be combined with the fixed frame, and the frames include two turning frame supports arranged in parallel and a cylinder support for fixing a hydraulic oil cylinder; the two turning frames are both semicircular steel structure trusses, the inner arc surface of the semicircular steel structure truss is the bearing surface of the steel pipe tiles, and six sets of steel plate clamping mechanisms for fixing the steel pipe tiles are arranged at equal intervals on both sides of the semicircular steel structure truss; the device of the present invention has the advantages of high degree of automation, high construction efficiency, high rounding accuracy, labor saving, low safety risk, etc.; the rounding device of the present invention is used for the rounding and longitudinal seam control technical construction of pressure steel pipes with large diameters and composed of two tiles, and can solve the technical problem of excessive roundness when rounding tiles.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing equipment design, in particular to the technical field of steel structure processing mechanical equipment design, and relates to a large-scale horizontal automatic rounding device for pressure steel pipes. Background Art

[0002] During the current domestic hydropower station construction process, large-diameter penstocks in tunnels are mostly manufactured using a two-tile assembly technique. Controlling the roundness of the pipes and the quality of the welds at the longitudinal seams is crucial for production. Currently, penstocks for hydropower projects are mostly assembled using a vertical assembly method, followed by flipping and welding the longitudinal seams. This method has the following major drawbacks: The rounding accuracy is low. Without the support of auxiliary equipment, the curvature of the tiles can rebound during vertical assembly, making it difficult to control the roundness of the longitudinal seams during assembly, resulting in reduced tile assembly quality. It also carries high safety risks, as tiles are prone to tipping during vertical assembly and are prone to unhooking during flipping and lifting, endangering the safety of construction workers. Construction is also slow. Because the pipe roundness cannot be achieved immediately with the vertical assembly method, repeated adjustments using equipment such as jacks are required, and much of the work requires rework. This slows construction and impacts the construction schedule. There are many operators. When adjusting the roundness of the pipe segment in vertical assembly, the upper and lower parts of the two longitudinal seams need to be adjusted at the same time. At least four operators are needed to carry out the construction, which places great demands on operators and equipment. Summary of the Invention

[0003] The present invention discloses a horizontal automatic rounding device for large-scale pressure steel pipes in view of the shortcomings of the prior art. The problem to be solved by the present invention is to design an auxiliary mechanism using a horizontal rounding method to address the shortcomings of the above-mentioned vertical rounding method.

[0004] The present invention is achieved through the following technical solutions:

[0005] A large-scale horizontal automatic rounding device for pressure steel pipes is characterized by comprising a fixed frame, a movable frame, and two turning frames symmetrically arranged on the movable frame and the fixed frame;

[0006] The fixed frame is a steel structure truss fixed to the ground, including two tilting frame supports arranged in parallel and a cylinder support for fixing and supporting the hydraulic cylinder. A rotatable tilting frame is arranged longitudinally on the fixed frame.

[0007] The mobile frame is a steel truss structure with four sets of running gear installed on the load-bearing steel beam at the bottom of the truss. The rollers of each running gear move along two longitudinally parallel tracks to realize the combination and separation of the mobile frame and the fixed frame. The mobile frame includes two parallel tilting frame supports and a cylinder support for fixing the hydraulic cylinder. The mobile frame is provided with a rotatable tilting frame in the longitudinal direction.

[0008] The turning frames arranged on the fixed frame and the mobile frame have the same structure and are arranged symmetrically; both turning frames are semicircular steel structure trusses, the inner arc surface of the semicircular steel structure truss is the bearing surface of the steel pipe tiles, and six sets of steel plate clamping mechanisms for fixing the steel pipe tiles are arranged at equal intervals on both sides of the semicircular steel structure truss; the midpoints of the semicircular edges of the two turning frames are hinged to the turning frame supports of the fixed frame or the mobile frame through the rotating axis to achieve mutually symmetrical 90-degree flipping, and two driving supports are arranged side by side on both sides of the bottom surface of the turning frame, and the driving supports are hinged to the piston of the hydraulic cylinder to realize the flipping drive of the turning frame.

[0009] The steel plate clamping mechanism further includes a fixed steel plate clamp, a movable steel plate clamp and a connecting bolt; the fixed steel plate clamp is welded and fixed to the side of the flip frame, and two bolt holes are set on the clamping plane; the movable steel plate clamp is a flat steel plate, and is provided with a clamping groove for embedding the side of the steel pipe tile to achieve limited fixation, and two bolt holes corresponding to the fixed steel plate clamp; the connecting bolt connects and fixes the movable steel plate clamp embedded in the steel pipe tile with the fixed steel plate clamp through the bolt hole.

[0010] A working platform is arranged at one end of the turnover frame of the present invention.

[0011] The walking device of the present invention is arranged parallel to the bottom surface of the load-bearing steel beam at the bottom of the mobile frame, wherein the two front walking mechanisms or the two rear walking mechanisms are active walking mechanisms with driving devices.

[0012] The fixed frame of the present invention fixes the frame support feet to the fixed base feet of the precast concrete solid body through fixing screws.

[0013] The rounding device of the present invention is used for the rounding and longitudinal seam control construction of large-diameter pressure steel pipes composed of two tiles, and can solve the technical problem of excessive roundness when rounding tiles. The present invention is designed and manufactured after the movable frame and fixed frame are manufactured and force-checked, the arc-shaped turning frame is manufactured, the oil cylinder support point on the arc-shaped turning frame is selected, the steel plate clamping mechanism is manufactured and connected and fixed, the hydraulic system is designed, the walking device is selected, the strength of the entire mechanism is stationary and after the tiles are installed, and the stability analysis and verification of the arc-shaped turning frame when the tiles are turned after the tiles are installed. During construction, the tiles are hoisted to the fixed frame arc-shaped turning frame and the movable frame arc-shaped turning frame respectively by lifting equipment, and the tiles are fixed by using steel plate clamping mechanisms. Then, the arc-shaped turning frame is turned 90 degrees by using a hydraulic cylinder, and the walking device is driven to drive the movable frame to slowly move closer to the fixed mechanism to the combined position. The longitudinal seam joint is reinforced by a welding machine, and then the frame is hoisted away from the construction platform.

[0014] Compared with the existing steel pipe rounding machine, the steel pipe rounding device of the present invention has the following advantages:

[0015] Highly automated. The rounding process for the construction mechanism of the present invention is as follows: hoisting tiles → securing them → flipping them → moving the frame → assembling tiles into a round shape → reinforcing longitudinal seams → lifting the pipe segments. During construction, operators only need to assist with the lifting equipment to hoist the tiles onto the curved flipping frame and secure them with steel plate clips. The remaining tile flipping and mechanism movement are controlled by professionals using remote control equipment to complete the rounding process.

[0016] High construction efficiency. During construction, the device of the present invention only requires the tiles to be hoisted onto the curved turning frame using a lifting device. The curved turning frame is then turned by a hydraulic cylinder. The traveling device drives the movable construction mechanism to move closer to the fixed construction mechanism. Once the weld is reinforced, the pipe section can be lifted off the construction mechanism. The entire construction process is basically unrestricted by other factors, and the construction efficiency is approximately two to three times that of a vertical assembly.

[0017] High roundness accuracy. During construction, the tiles are fixed on a flip frame with the same curvature as their own, so that the curvature of the tiles remains unchanged. After flipping and splicing, the roundness of the steel pipe at the longitudinal seam basically meets the technical requirements. If the roundness exceeds the technical requirements, it only needs to be fine-tuned using a jack.

[0018] Save manpower. The device of the present invention only requires 2 to 3 trained professional operators to coordinate the installation of tiles and pipe segments and other processes, saving about half the manpower compared to vertical assembly.

[0019] Low safety risk. During construction, tiles are hoisted horizontally to reduce the risk of unhooking. Compared to vertical assembly, there is no risk of tile toppling. Each tile is fixed to the curved tilting frame with 12 steel plate clips and high-strength bolts, reducing the risk of tiles falling or sliding during rotation. The steel plate clips are easy to install and remove, safe and reliable. The tiles are assembled in one go, reducing other safety risks associated with the use of auxiliary equipment such as jacks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view structural diagram of the horizontal automatic circle forming machine of the present invention;

[0021] Figure 2 This is a schematic side view of the horizontal automatic circle forming machine shaft of the present invention;

[0022] Figure 3 This is a front view structural diagram of the arc-shaped turning frame of the horizontal automatic circle forming machine of the present invention;

[0023] Figure 4 This is a schematic side view of the arc-shaped turning frame axis of the horizontal automatic circle forming machine of the present invention;

[0024] Figure 5 This is a schematic diagram of the horizontal automatic circle forming machine of the present invention before assembly;

[0025] Figure 6 This is a schematic diagram of the horizontal automatic circle forming machine of the present invention combined with the rear carrier;

[0026] Figure 7 1 is a schematic diagram of the support structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the movable steel plate buckle of the present invention;

[0028] Figure 9 It is a schematic diagram of the fixing structure of the steel pipe tile and the turning frame of the present invention.

[0029] In the figure, 1 is the mobile frame, 2 is the fixed frame, 3 is the turning frame, 4 is the turning frame support, 5 is the walking track, 6 is the fixed base, 7 is the cylinder support, 8 is the walking device, and 9 is the hydraulic cylinder; 31 is the arc support frame, 32 is the rotating shaft, 33 is the driving support, 34 is the fixed steel plate clamp, 35 is the working platform, 36 is the movable steel plate clamp, 361 is the card slot, 362 is the bolt hole, 37 is the connecting bolt, and G is the tile. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with specific embodiments. The specific embodiments are further explanations of the principles of the present invention and do not limit the present invention in any way. Technologies that are the same or similar to the present invention do not exceed the scope of protection of the present invention.

[0031] Combined with the attached drawings.

[0032] As shown in the figure, the large-scale horizontal automatic rounding device for penstocks of the present invention comprises: a movable frame 1, a fixed frame 2, two curved turning frames 3, a support base 4, a combination steel plate clamp, a cylinder support 7, a running mechanism 8, a hydraulic cylinder 9, a running track 5, and a fixed footing 6. Both the fixed frame 2 and the movable frame 1 are connected to the curved turning frame 3 via a rotating support base 4. Two sets of cylinder drive supports 33 are located at the quarter-point of the curved turning frame to articulate the piston rod section of the hydraulic cylinder 9. The other end of the hydraulic cylinder 9 is connected to the cylinder support 7 on the fixed mechanism or the movable mechanism. Twelve sets of combination steel plate clamps are evenly arranged on both sides of each curved turning frame 3. Ladders and safety rails are installed on both sides of the fixed frame 2 and the movable frame 1 for operators to climb. Each set of combination steel plate clamps consists of fixed steel plate clamps 34 fixed at equal intervals on both sides of the curved turning frame 3, movable steel plate clamps 36 for retaining the side of the steel pipe tile G, and connecting bolts 37.

[0033] During construction, first use the lifting equipment to lift the two steel pipe tiles G that need to be assembled into a circle one by one to the arc-shaped turning frame 3 of the fixed frame 2 and the arc-shaped turning frame 3 of the mobile frame 1; then use the combined steel plate buckles on both sides to fix the tiles G on the arc-shaped turning frame 3, as shown in the figure. Figure 9As shown; start the hydraulic pump station, drive the hydraulic cylinder piston 9 rod to extend, drive the arc-shaped flip frame 3 around the flip frame support seat 4 to flip, the left movable frame 1 of the arc-shaped flip frame 3 flips 90 degrees clockwise, the right fixed frame 2 of the arc-shaped flip frame 3 flips 90 degrees counterclockwise, as shown Figure 7 After flipping into place, operate the walking device to drive the movable mechanism to slowly move closer to the fixed frame 1 until the two tiles G are in contact at the longitudinal seam. Figure 8 As shown, then check the misalignment of tile G and the roundness of the pipe section at the longitudinal seam. If qualified, use welding equipment to reinforce the longitudinal seam. If the misalignment and the roundness of the pipe section at the longitudinal seam do not meet the technical requirements, use a jack to make fine adjustments at the upper and lower longitudinal seams. At this point, the rounding work of tile G is completed. Then use the lifting equipment to lift the rounded pipe section to the load, loosen the combined steel plate buckle, lift the pipe section away from the rounding mechanism, and then restore each part to its original position for the next rounding construction.

Claims

1. A large-scale horizontal automatic rounding device for penstocks, characterized by: It includes a fixed frame, a mobile frame and two turning frames symmetrically arranged on the mobile frame and the fixed frame; The fixed frame is a steel structure truss fixed to the ground, including two tilting frame supports arranged in parallel and a cylinder support for fixing and supporting the hydraulic cylinder. A rotatable tilting frame is arranged longitudinally on the fixed frame. The mobile frame is a steel truss structure with four sets of running gear installed on the load-bearing steel beam at the bottom of the truss. The rollers of each running gear move along two longitudinally parallel tracks to realize the combination and separation of the mobile frame and the fixed frame. The mobile frame includes two parallel tilting frame supports and a cylinder support for fixing the hydraulic cylinder. The mobile frame is provided with a rotatable tilting frame in the longitudinal direction. The turning frames arranged on the fixed frame and the mobile frame have the same structure and are arranged symmetrically; both turning frames are semicircular steel structure trusses, the inner arc surface of the semicircular steel structure trusses is the bearing surface of the steel pipe tiles, and six sets of steel plate clamping mechanisms for fixing the steel pipe tiles are arranged at equal intervals on both sides of the semicircular steel structure trusses; the midpoints of the semicircular sides of the two turning frames are hinged to the turning frame supports of the fixed frame or the mobile frame through the rotation axis to achieve symmetrical 90-degree turning with each other, and two driving supports are arranged side by side on both sides of the bottom surface of the turning frame, and the driving supports are hinged to the piston of the hydraulic cylinder to realize the turning drive of the turning frame; The steel plate clamping mechanism includes a fixed steel plate clamp, a movable steel plate clamp and a connecting bolt; the fixed steel plate clamp is welded and fixed to the side of the flip frame, and two bolt holes are set on the clamping plane; the movable steel plate clamp is a flat steel plate, and is provided with a clamping groove for embedding the side of the steel pipe tile to achieve limited fixation, and two bolt holes corresponding to the fixed steel plate clamp; the connecting bolt connects and fixes the movable steel plate clamp embedded in the steel pipe tile with the fixed steel plate clamp through the bolt hole.

2. The large-scale horizontal automatic rounding device for penstocks according to claim 1 is characterized in that: A working platform is provided at one end of the turnover frame.

3. The large-scale horizontal automatic rounding device for penstocks according to claim 1 is characterized in that: The traveling device is arranged in parallel on the bottom surface of the load-bearing steel beam at the bottom of the mobile frame, wherein the two front traveling mechanisms or the two rear traveling mechanisms are active traveling mechanisms with driving devices.

4. The large-scale horizontal automatic rounding device for penstocks according to claim 1 is characterized in that: The fixed frame fixes the frame support feet to the fixed base feet of the precast concrete solid body through fixing screws.

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