Overhaul device for steam turbine of thermal power plant

Abstract

The overhauling device comprises an operation table, an auxiliary bending pin column is fixedly installed on the operation table, a bending mechanism is installed on the operation table, the bending mechanism is symmetrical about the operation table, and elastic clamping assemblies are symmetrically arranged at the upper end and the lower end of the operation table; the bending mechanism comprises two first supporting blocks fixedly installed on the operation table, the two first supporting blocks are rotationally connected with threaded rods through bearings, and the two threaded rods are in transmission connection with a servo motor. Therefore, when the two elastic clamping assemblies jointly clamp the pipeline, the center of the pipeline is automatically located in the dead center of the operation table, manual measurement is not needed, and the use convenience is improved; and the bending mechanism synchronously drives the two bending devices to move, so that force can be synchronously applied to the two ends of the pipeline, and the pipeline is bent uniformly.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine maintenance, in particular to a maintenance device for a steam turbine in a thermal power plant. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto the blades, causing the rotor equipped with the blade row to rotate and perform work externally. Steam turbines are the main equipment of modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power plants. Steam turbine maintenance pipelines are usually bent with the help of a bending device. In the prior art, the bending of steam turbine maintenance pipelines is usually performed by manually measuring the length of the pipeline before bending to ensure that the pipeline is bent from the middle position. The middle position is determined, and then the pipeline is bent from the middle part of the pipeline. The existing steam turbine maintenance pipeline needs to be manually measured before bending the length of the pipeline, determine the middle position, and then bend the pipeline from the middle part of the pipeline. The manual dependence is large, the work efficiency is low, and there is a tendency for measurement errors to affect the accuracy of the pipeline bending position and reduce the yield rate. Summary of the invention

[0003] In view of the problems existing in an existing maintenance device for a steam turbine in a thermal power plant, the present invention is proposed.

[0004] Therefore, the object of the present invention is to provide a maintenance device for a steam turbine in a thermal power plant to solve the problem.

[0005] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A maintenance device for a steam turbine in a thermal power plant comprises an operating table, on which an auxiliary bending pin is fixedly mounted, a bending mechanism is mounted on the operating table, the bending mechanism is symmetrical about the operating table, and elastic clamping components are symmetrically arranged at the upper and lower ends of the operating table.

[0006] As a preferred solution of the maintenance device for a thermal power plant turbine described in the present invention, the bending mechanism includes two first support blocks fixedly mounted on an operating table, the two first support blocks are rotatably connected to threaded rods through bearings, the two threaded rods are transmission-connected to servo motors, the two threaded rods are threadedly connected to benders, and the bender is slidably connected to the operating table.

[0007] As a preferred solution of the maintenance device for a steam turbine in a thermal power plant described in the present invention, two second support blocks are welded on the operating table, and the two second support blocks are rotatably connected to two threaded rods through bearings respectively.

[0008] As a preferred solution of the maintenance device for a thermal power plant steam turbine described in the present invention, the ends of the two threaded rods are fixedly mounted with driven gears, the two driven gears are meshed and connected with driving gears, and the driving gears are fixedly mounted on the output shaft of the servo motor.

[0009] As a preferred solution of the maintenance device for a steam turbine in a thermal power plant described in the present invention, a protection box is installed on the operating table by bolts, and the driven gear, the driving gear and the servo motor are all arranged in the protection box.

[0010] As a preferred solution of the maintenance device for a thermal power plant turbine described in the present invention, the bender includes a slider threadedly connected to the threaded rod, the top end of the slider is rotatably connected to a pin shaft through a bearing, and the top end of the pin shaft is fixedly connected to an arc-shaped bending plate.

[0011] As a preferred solution of the maintenance device for a thermal power plant turbine described in the present invention, the elastic clamping assembly includes a fixed plate welded on an operating table, a spring is fixedly installed on the fixed plate, the other end of the spring is fixedly connected to a clamping block, the outer wall of the clamping block is fixedly connected to a pull rod, and the pull rod is slidably connected to the fixed plate.

[0012] As a preferred solution of the maintenance device for a steam turbine in a thermal power plant described in the present invention, a notch is provided on the clamping block, and a through hole for the pull rod to pass through is provided on the fixing plate.

[0013] As a preferred solution of the maintenance device for a thermal power plant steam turbine described in the present invention, a first disc and a second disc are respectively welded at both ends of the spring, and the first disc and the second disc are respectively mounted on a fixing plate and a clamping block by bolts.

[0014] Compared with existing technologies: 1. By setting two symmetrical elastic clamping components on the operating table, when the two elastic clamping components clamp the pipe together, the center of the pipe is automatically located in the center of the operating table, so that manual measurement is not required, which improves the convenience of use; 2. The bending mechanism drives the two bender to move synchronously, so that force can be applied to both ends of the pipe synchronously, so that the pipe is bent evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure provided by the present invention; Figure 2 A cross-sectional view of the protection box provided by the present invention; Figure 3 An enlarged view of the elastic clamping assembly provided by the present invention; Figure 4 A schematic diagram of the bender provided by the present invention.

[0016] In the figure: operating table 1, protective box 2, mounting block 21, second support block 3, threaded rod 4, first support block 5, slide groove 6, auxiliary bending pin 7, arc bending plate 8, pin shaft 81, driven gear 9, driving gear 10, servo motor 11, slider 12, bearing 14, elastic clamping assembly 100, clamping block 101, notch 1011, spring 102, first disc 1021, second disc 1022, fixing plate 103, through hole 1031, pull rod 105, pull ring 106. DETAILED DESCRIPTION

[0017] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] The present invention provides a maintenance device for a steam turbine in a thermal power plant. Figure 1-4 , including an operating table 1, on which an auxiliary bending pin 7 is fixedly installed, a bending mechanism is installed on the operating table 1, the bending mechanism is symmetrical about the operating table 1, and elastic clamping components 100 are symmetrically arranged at the upper and lower ends of the operating table 1; so that after the two elastic clamping components 100 clamp the pipeline, the center of the pipeline is located at the center of the operating table 1, and at this time, it can be guaranteed to be bent at the center of the pipeline.

[0019] The bending mechanism includes two first support blocks 5 fixedly mounted on the operating table 1, the two first support blocks 5 are rotatably connected to a threaded rod 4 through bearings, the two threaded rods 4 are transmission-connected to a servo motor 11, the two threaded rods 4 are threadedly connected to a bender, and the bender is slidably connected to the operating table 1.

[0020] Two second support blocks 3 are welded on the operating table 1 , and the two second support blocks 3 are rotatably connected to two threaded rods 4 through bearings respectively.

[0021] Driven gears 9 are fixedly mounted on the ends of the two threaded rods 4 . The two driven gears 9 are meshedly connected to a driving gear 10 . The driving gear 10 is fixedly mounted on the output shaft of the servo motor 11 .

[0022] A protective box 2 is installed on the operating table 1 by bolts. Specifically, a mounting block 21 is welded on the outer wall of the protective box 2, and the mounting block 21 is fixed to the operating table 1 by bolts. The driven gear 9, the driving gear 10 and the servo motor 11 are all arranged in the protective box 2.

[0023] The bender includes a slider 12 threadedly connected to the threaded rod 4, a slide groove 6 is provided on the operating table 1, the inner wall of the slide groove 6 is slidably connected to the slider 12, the top end of the slider 12 is rotatably connected to the pin 81 through the bearing 14, and the top end of the pin 81 is fixedly connected to the arc-shaped bending plate 8; The bending mechanism synchronously drives the two benders to move, so that force can be applied to both ends of the pipe synchronously, so that the pipe is bent evenly.

[0024] The elastic clamping assembly 100 includes a fixed plate 103 welded on the operating table 1, a spring 102 is fixedly installed on the fixed plate 103, the other end of the spring 102 is fixedly connected to a clamping block 101, a pull rod 105 is fixedly connected to the outer wall of the clamping block 101, the end of the pull rod 105 is fixedly connected to a pull ring 106, and the pull rod 105 and the fixed plate 103 are slidably connected.

[0025] The clamping block 101 is provided with a notch 1011 , and the fixing plate 103 is provided with a through hole 1031 for the pull rod 105 to pass through.

[0026] A first disc 1021 and a second disc 1022 are welded to both ends of the spring 102 , respectively. The first disc 1021 and the second disc 1022 are respectively mounted on the fixing plate 103 and the clamping block 101 by bolts.

[0027] In specific use, the pipe to be bent is located between the two clamping blocks 101. Under the action of the equal elastic force of the two elastic clamping components 100, the pipe is located at the center of the operating table 1 (that is, at the auxiliary bending pin 7); The servo motor 11 is started to drive the two threaded rods 4 to rotate, thereby driving the two bender to move synchronously to complete the bending operation of the pipe.

[0028] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A maintenance device for a steam turbine in a thermal power plant, comprising an operating table (1), an auxiliary bending pin (7) being fixedly mounted on the operating table (1), a bending mechanism being mounted on the operating table (1), the bending mechanism being symmetrical about the operating table (1), and characterized in that: Elastic clamping components (100) are symmetrically arranged at the upper and lower ends of the operating table (1).

2. A maintenance device for a steam turbine in a thermal power plant according to claim 1, characterized in that: The bending mechanism comprises two first support blocks (5) fixedly mounted on the operating table (1); the two first support blocks (5) are rotatably connected to a threaded rod (4) via a bearing; the two threaded rods (4) are transmission-connected to a servo motor (11); the two threaded rods (4) are threadedly connected to a bender; and the bender is slidably connected to the operating table (1).

3. A maintenance device for a steam turbine in a thermal power plant according to claim 2, characterized in that: Two second support blocks (3) are welded on the operating table (1), and the two second support blocks (3) are rotatably connected to the two threaded rods (4) via bearings.

4. A maintenance device for a steam turbine in a thermal power plant according to claim 2 or 3, characterized in that: A driven gear (9) is fixedly mounted on the ends of the two threaded rods (4), and the two driven gears (9) are meshedly connected to a driving gear (10), and the driving gear (10) is fixedly mounted on the output shaft of the servo motor (11).

5. The maintenance device for a steam turbine in a thermal power plant according to claim 4, characterized in that: The protection box (2) is mounted on the operating table (1) by means of bolts, and the driven gear (9), the driving gear (10) and the servo motor (11) are all arranged in the protection box (2).

6. The maintenance device for a steam turbine in a thermal power plant according to claim 5, characterized in that: The bender comprises a slider (12) threadedly connected to the threaded rod (4); the top end of the slider (12) is rotatably connected to a pin shaft (81) via a bearing (14); the top end of the pin shaft (81) is fixedly connected to an arc-shaped bending plate (8).

7. A maintenance device for a steam turbine in a thermal power plant according to claim 5 or 6, characterized in that: The elastic clamping assembly (100) comprises a fixing plate (103) welded to the operating table (1), a spring (102) being fixedly mounted on the fixing plate (103), the other end of the spring (102) being fixedly connected to a clamping block (101), the outer wall of the clamping block (101) being fixedly connected to a pull rod (105), and the pull rod (105) being slidably connected to the fixing plate (103).

8. The maintenance device for a steam turbine in a thermal power plant according to claim 7, characterized in that: The clamping block (101) is provided with a notch (1011), and the fixing plate (103) is provided with a through hole (1031) for the pull rod (105) to pass through.

9. The maintenance device for a steam turbine in a thermal power plant according to claim 7, characterized in that: A first disc (1021) and a second disc (1022) are respectively welded to two ends of the spring (102); the first disc (1021) and the second disc (1022) are respectively mounted on the fixing plate (103) and the clamping block (101) by means of bolts.

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