A bending device for steam turbine maintenance pipelines in thermal power plants

Abstract

This invention discloses a pipe bending device for turbine maintenance in a thermal power plant, including a workbench with supporting legs around its bottom and a bending device on top for bending the pipe. A bending heating device is located on one side of the bending device to heat the pipe. This heating device allows for heat treatment of the bending area before bending, making the pipe forming more stable. Heating enhances the pipe's plasticity, preventing deformation or even cracking during bending. A rotating rod is linked to a heating plate, and a second gear drives a fixed rod to rotate, which in turn moves the heating plate away from the pipe. This ensures that the heating plate automatically detaches from the pipe during bending, avoiding interference with subsequent bending and eliminating the need for separate heating control. An angle scale on an angle dial facilitates precise control of the bending angle, increasing bending accuracy.

Description

Technical Field

[0001] This invention relates primarily to the technical field of steam turbines, specifically to a bending device for steam turbine maintenance pipelines in thermal power plants. Background Technology

[0002] A thermal power plant, or simply a coal-fired power plant, is a factory that uses combustible materials as fuel to produce electricity. A steam turbine, also known as a steam turbine engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto the blades, causing the rotor equipped with a row of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants. During the maintenance of steam turbines in thermal power plants, when it is necessary to lay pipelines on site, pipe benders are used to bend the pipelines.

[0003] A search revealed that Chinese patent publication number 202220273063.4 discloses "a pipe bending device for overhauling a steam turbine in a thermal power plant, comprising: a fixed base, a U-shaped frame above the fixed base, a movable plate at the left end of the fixed base, a movable shaft fixedly connected to the bottom end of the movable plate, a symmetrical first bearing fixedly embedded in the inner wall of the fixed base, both ends of the movable shaft being fixedly connected to the inner ring of the first bearing, and a clamping plate inside the U-shaped frame." While this prior art can achieve a simple bending function, it still has the following drawbacks:

[0004] (1) In the prior art, when the pipe is bent by the moving plate, under the interaction of forces, deformation will start from the rolling wheel, causing the internal atomic arrangement of the metal to be misaligned, and it is difficult to control the direction of deformation. During the bending process, the pipe will be deformed or broken. After the bending is completed, due to the characteristics of the metal, it will spring back, affecting the bending effect and quality, and thus affecting subsequent use.

[0005] (2) In the existing technology, the angle of bending is observed by the naked eye. It is impossible to accurately control the angle of bending during use, which will make it difficult for the pipe to meet the installation requirements after bending, affecting the subsequent construction progress and making it less practical. Summary of the Invention

[0006] This invention mainly provides a bending device for steam turbine maintenance pipelines in thermal power plants to solve the technical problems mentioned in the background art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A pipe bending device for turbine maintenance in a thermal power plant includes a workbench with supporting legs at the bottom of the workbench and a bending device for bending the pipe at the top of the workbench. A bending heating device for heating the pipe is provided on one side of the bending device.

[0009] Preferably, the bending device includes a fixed frame and an angle plate. The bottom of the fixed frame is connected to the top of the workbench. The angle plate is arranged in a fan shape. One side of the angle plate is connected to the fixed frame. A bending component is provided on the angle plate.

[0010] Preferably, the angle plate has a bending trajectory groove, which is arc-shaped. A limit bolt is slidably installed inside the bending trajectory groove. With the angle plate and the bending trajectory groove and the limit bolt working together, the angle of the bending rod is limited, which increases the bending accuracy.

[0011] Preferably, the bending assembly includes a bending rod with a Z-shaped structure. One end of the bending rod is connected to the angle plate via a first rotating shaft, and the middle part of the bending rod is connected to the angle plate via a sliding screw. The sliding screw slides inside the bending trajectory groove, making it convenient to use and allowing for easy operation of the bending rod to bend the pipe.

[0012] Preferably, the end of the bending rod away from the angle plate is connected to a bending handle, and the end of the bending rod near the angle plate is connected to a bending pressure head for bending the pipe, so that bending can be easily performed by operating the bending handle.

[0013] Preferably, the bending heating device includes a first gear, a first rack, a second gear, a second rack, and a heating plate. The first gear and the second gear are both sector gears. The end of the first rotating shaft away from the angle plate is connected to the first gear. The first rack and the second rack are connected by a first connecting rod. The first rack, the second rack, and the first connecting rod are arranged in a Z-shaped structure. The first gear and the first rack are meshed and connected.

[0014] Preferably, the second gear is connected to the bottom of the worktable via a second connecting rod. A fixed rod is connected to one end of the second connecting rod away from the bottom of the worktable. Rotating rods are connected to both ends of the fixed rod via second rotating shafts. The end of the rotating rod near the bending rod is connected to the heating plate.

[0015] Preferably, the second gear is meshed with the second rack, and the movement of the second rack drives the second gear to rotate.

[0016] Preferably, an angle scale line is provided on one side of the bending trajectory groove on the displacement angle dial, and the degree of bending can be observed at any time through the angle scale line.

[0017] Preferably, the heating plate is movably connected to the pipe, and the second connecting rod is rotated by the second gear. The second connecting rod then moves the heating plate at the end of the first connecting rod away from the pipe, so that when a bend occurs, the heating plate automatically detaches from the pipe, avoiding any impact on subsequent bends, and no separate heating control is required.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By using the set bending heating device, the bending point can be heat-treated before bending, which can greatly reduce the bending pressure and make the pipe forming more stable. Heating can enhance the plasticity of the pipe and prevent the pipe from deforming or even cracking during bending, thus solving the problem of pipe deformation and breakage during bending in the existing technology.

[0020] 2. By setting the rotating rod to be linked with the heating plate, under the transmission of the first gear, the first rack, the second gear and the second rack, the second gear drives the fixed rod to rotate, and the fixed rod drives the heating plate at the end of the rotating rod away from the pipe, so that when bending occurs, the heating plate automatically detaches from the pipe, avoiding the impact on subsequent bending, and no separate heating control is required;

[0021] 3. The angle dial allows for constant monitoring of the bending progress via the angle scale. Furthermore, the bending trajectory grooves on the angle dial, along with the limiting bolts, limit the angle of the bending rod's movement, increasing bending accuracy.

[0022] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is the front view of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 This is a rear view of the present invention;

[0026] Figure 4 This is a bottom view of the present invention;

[0027] Figure 5 This is a schematic diagram showing the connection between the first connecting rod and the first and second racks of the present invention.

[0028] Figure Descriptions: 1. Workbench; 2. Support leg; 3. Bending device; 31. Fixing frame; 32. Angle plate; 321. Bending trajectory groove; 322. Limiting bolt; 323. Angle scale line; 33. Bending assembly; 330. First rotating shaft; 331. Bending rod; 332. Sliding screw; 333. Bending handle; 4. Bending heating device; 41. First gear; 42. First rack; 43. Second gear; 44. Second rack; 45. First connecting rod; 46. Heating plate; 47. Second connecting rod; 48. Fixing rod; 49. Second rotating shaft; 50. Rotating rod. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Please refer to the appendix carefully. Figure 1-5As shown, a pipe bending device for turbine maintenance in a thermal power plant includes a workbench 1 with support legs 2 around its bottom. A bending device 3 for bending the pipe is mounted on the top of the workbench 1. A bending heating device 4 for heating the pipe is mounted on one side of the bending device 3. The bending device 3 includes a fixed frame 31 and an angle plate 32. The bottom of the fixed frame 31 is connected to the top of the workbench 1. The angle plate 32 has a fan-shaped structure and is connected to the fixed frame 31 on one side. A bending assembly 33 is mounted on the angle plate 32. A bending trajectory groove 321 is formed on the angle plate 32, and the bending trajectory groove 321 has an arc-shaped structure. A limit bolt 322 is slidably mounted inside the bending trajectory groove 321. An angle scale line 323 is provided on one side of the bending trajectory groove 321 on the angle plate 32, allowing for constant bending. The degree of bending is observed by the angle plate 32. With the cooperation of the bending trajectory groove 321 and the limiting bolt 322 in the angle plate 32, the angle of movement of the bending rod 331 is limited, which increases the accuracy of bending. The bending assembly 33 includes a bending rod 331 with a Z-shaped structure. One end of the bending rod 331 is connected to the angle plate 32 through the first rotating shaft 330. The middle part of the bending rod 331 is connected to the angle plate 32 through the sliding screw 332. The sliding screw 332 slides inside the bending trajectory groove 321, which is convenient to use and allows for easy operation of the bending rod 331 to bend the pipe. The end of the bending rod 331 away from the angle plate 32 is connected to a bending handle 333, and the end of the bending rod 331 near the angle plate 32 is connected to a bending pressure head for bending the pipe. Bending is convenient by operating the bending handle 333.

[0033] It should be noted that in this embodiment, the angle plate 32 and the angle scale line 323 can be used to observe the degree of bending at any time. At the same time, with the cooperation of the bending trajectory groove 321 and the limiting bolt 322 in the angle plate 32, the angle of movement of the bending rod 331 is limited, which increases the accuracy of bending.

[0034] Please refer to the appendix carefully. Figure 2-5As shown, the bending heating device 4 includes a first gear 41, a first rack 42, a second gear 43, a second rack 44, and a heating plate 46. Both the first gear 41 and the second gear 43 are sector gears. The end of the first rotating shaft 330 furthest from the angle plate 32 is connected to the first gear 41. The first rack 42 and the second rack 44 are connected via a first connecting rod 45. The first rack 42, the second rack 44, and the first connecting rod 45 are arranged in a Z-shaped structure. The first gear 41 meshes with the first rack 42. The second gear 43 is connected to the bottom of the worktable 1 via a second connecting rod 47. The second connecting rod 47 is furthest from the worktable 1. A fixed rod 48 is connected to one end of the bottom of the platform 1. The two ends of the fixed rod 48 are connected to rotating rods 50 via second rotating shafts 49. The end of the rotating rod 50 near the bending rod 331 is connected to the heating plate 46. The second gear 43 is meshed with the second rack 44. When the second rack 44 moves, it drives the second gear 43 to rotate. The heating plate 46 is in contact with the pipe. The fixed rod 48 is driven to rotate by the second gear 43, and the heating plate 46 at the end of the rotating rod 50 is driven away from the pipe by the fixed rod 48. When bending occurs, the heating plate 46 automatically disengages from the pipe to avoid affecting subsequent bending. No separate heating control is required.

[0035] It should be noted that in this embodiment, when bending, the pipe is placed at the bottom of the bending head on the top of the workbench 1. At this time, the pipe is connected to the heating plate 46. The heating plate 46 heats the pipe at the bottom of the bending head, heat-treating the bending area. This can greatly reduce the bending pressure, making the pipe forming more stable. Heating can enhance the plasticity of the pipe, preventing deformation or even cracking during bending. During bending, the position of the limiting bolt 322 inside the displacement bending trajectory groove 321 is adjusted according to the required bending angle and the angle scale line 323, so that the position of the limiting bolt 322 closer to one side is the bending position. The pipe is bent by holding the bending handle 333. At this time, the first gear 41 drives the first rack 42 to move, and the second rack 44 moves at the same time. The second rack 44 moves and drives the second gear 43 to rotate. The fixed rod 48 rotates with the second gear 43. The fixed rod 48 drives the rotating rod 50 to move back and forth. At this time, the heating plate 46 on the rotating rod 50 separates from the pipe. When the sliding screw 332 on the bending rod 331 contacts the limit bolt 322, the bending is completed. When the bending occurs, the heating plate 46 automatically detaches from the pipe to avoid affecting subsequent bending. No separate heating control is required.

[0036] The specific process of this invention is as follows:

[0037] Before bending, the pipe is placed at the bottom of the bending head on the top of the workbench 1. At this time, the pipe is connected to the heating plate 46. The pipe at the bottom of the bending head is heated by the heating plate 46, and the bending point is heat-treated. This can greatly reduce the bending pressure and make the pipe forming more stable. Heating can enhance the plasticity of the pipe and prevent the pipe from deforming or even cracking when bending.

[0038] When bending, adjust the position of the limiting bolt 322 inside the displacement bending trajectory groove 321 according to the required bending angle and the angle scale line 323, so that the position of the limiting bolt 322 close to one side is the bending position.

[0039] The pipe is bent by holding the bending handle 333. At this time, the first gear 41 drives the first rack 42 to move, and the second rack 44 moves at the same time. The second rack 44 moves and drives the second gear 43 to rotate. The fixed rod 48 rotates with the second gear 43. The fixed rod 48 drives the rotating rod 50 to move back and forth. At this time, the heating plate 46 on the rotating rod 50 separates from the pipe. When the sliding screw 332 on the bending rod 331 contacts the limiting bolt 322, the bending is completed. When the bending rod 331 returns to its original position, the heating plate 46 returns to its original position.

[0040] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A bending device for steam turbine maintenance pipelines in a thermal power plant, comprising a workbench (1), characterized in that... The workbench (1) is provided with support legs (2) around its bottom, and a bending device (3) for bending the pipe is provided on the top of the workbench (1). A bending heating device (4) for heating the pipe is provided on one side of the bending device (3). The bending device (3) includes a fixed frame (31) and an angle plate (32). The bottom of the fixed frame (31) is connected to the top of the workbench (1). The angle plate (32) is arranged in a fan shape. One side of the angle plate (32) is connected to the fixed frame (31). A bending component (33) is provided on the angle plate (32). The angle disk (32) is provided with a bending trajectory groove (321), the bending trajectory groove (321) is arranged in an arc shape, and a limit bolt (322) is slidably arranged inside the bending trajectory groove (321). The bending assembly (33) includes a bending rod (331), which is arranged in a Z-shape. One end of the bending rod (331) is connected to the angle disk (32) through a first rotating shaft (330), and the middle part of the bending rod (331) is connected to the angle disk (32) through a sliding screw (332). The sliding screw (332) slides inside the bending trajectory groove (321). The bending rod (331) is connected to a bending handle (333) at the end away from the angle plate (32), and a bending pressure head for bending the pipe is connected to the end of the bending rod (331) close to the angle plate (32). The bending heating device (4) includes a first gear (41), a first rack (42), a second gear (43), a second rack (44), and a heating plate (46). The first gear (41) and the second gear (43) are both sector gears. The end of the first rotating shaft (330) away from the angle disk (32) is connected to the first gear (41). The first rack (42) and the second rack (44) are connected by a first connecting rod (45). The first rack (42), the second rack (44), and the first connecting rod (45) are arranged in a Z-shaped structure. The first gear (41) meshes with the first rack (42). The second gear (43) is connected to the bottom of the workbench (1) via the second connecting rod (47). The end of the second connecting rod (47) away from the bottom of the workbench (1) is connected to a fixed rod (48). The two ends of the fixed rod (48) are connected to rotating rods (50) via the second rotating shaft (49). The end of the rotating rod (50) near the bending rod (331) is connected to the heating plate (46). The second gear (43) meshes with the second rack (44); An angle scale line (323) is provided on one side of the bending trajectory groove (321) on the displacement angle disk (32).

2. The bending device for turbine maintenance pipelines in a thermal power plant according to claim 1, characterized in that, The heating plate (46) is in active connection with the pipe.

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