Disassembling and assembling platform for movable guide vane of mixed-flow unit

Abstract

The utility model provides a platform for disassembling and assembling a movable guide vane of a mixed-flow unit. The platform comprises a working platform, a rotating piece and a bracket, the support is detachably installed at the top of the rotating wheel flange, the rotating piece installed at the top of the support is connected with the working platform through a steel wire rope, and the rotating piece can rotate along the axis of the rotating wheel. A walking mechanism is installed at the bottom of the operation platform and comprises a first roller supported on the top of a runner crown of the runner, a second roller abutting against the cylindrical face of the outer side of the runner crown and a third roller supported on the foundation pit lining. During working, under the constraint of the steel wire rope, the second roller moves circumferentially along the upper crown of the rotating wheel under the driving of the traveling mechanism driving device, so that the working platform is driven to move circumferentially along the axis of the rotating wheel, the requirement of position movement during guide vane disassembly and assembly is met, the movement of the working platform is simplified, and the safety and the working efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower equipment maintenance, in particular to a mixed flow unit movable guide vane disassembly and assembly platform. Background Art

[0002] When a certain hydro-turbine generator set is being repaired, it is necessary to lift out the movable guide vanes for inspection. Before lifting, the guide vane hoist must be installed. Since the height of the guide vanes is about 5m and the distance between them and the runner is far, it is difficult and risky to install the hoist. Therefore, it is necessary to design an operating platform to ensure the safe installation of the guide vane hoist. Currently, this is done by setting up wooden boards or special bridges. The disadvantage of setting up wooden boards is that during the transfer and operation of the wooden boards, there is a high risk of falling safety for operators, and the efficiency is low. The special bridge is set up on the seat ring and the runner at both ends. The disadvantage is that the suspension bridge cannot be moved and needs to be lifted by a bridge crane to move its position, which affects the efficiency of the guide vane hoisting. Utility Model Content

[0003] The purpose of the utility model is to provide a platform for disassembling and assembling movable guide vanes of a mixed flow unit. Under the action of a driving mechanism and a steel wire rope, the working platform can move along the circumferential direction of the upper crown of the runner, thereby simplifying the movement of the working platform and improving safety and work efficiency. In order to achieve the above technical features, the purpose of the utility model is achieved as follows:

[0004] A platform for disassembling and assembling movable guide vanes of a mixed flow unit, comprising a working platform, a rotating part, and a bracket;

[0005] The bracket is detachably mounted on the top of the runner flange, the rotating member mounted on the top of the bracket is connected to the working platform via a steel wire rope, and the rotating member can perform a rotary motion along the axis of the runner;

[0006] A walking mechanism is installed at the bottom of the working platform, and the walking mechanism includes a first roller supported on the top of the upper crown of the wheel, a second roller abutting against the outer cylindrical surface of the upper crown of the wheel, and a third roller supported on the lining of the foundation pit.

[0007] A tensioner is installed on the steel wire rope.

[0008] The first roller and the second roller are connected to an electric driving device respectively.

[0009] The first roller and the third roller are rubber load-bearing rollers.

[0010] The utility model unit movable guide vane disassembly and assembly platform includes a working platform, the bottom of which is installed with a first roller for supporting the top of the runner crown of the runner and a third roller supported on the lining of the foundation pit, and the erection of the working platform is completed by setting the first roller and the third roller; the working platform is connected to the rotating part through a wire rope, so that the second roller installed at the bottom of the working platform abuts against the outer cylindrical surface of the runner crown. Under the restraint of the wire rope, and then driven by the walking mechanism driving device, the second roller moves along the circumference of the runner crown, thereby driving the working platform to make a circular motion along the axis of the runner to meet the need for position movement when disassembling and assembling the guide vanes, simplifying the movement of the working platform, improving work efficiency, and avoiding personnel climbing ladders to improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 A schematic diagram of the installation structure of a movable guide vane disassembly and assembly platform for a mixed flow unit provided in an embodiment of the utility model (from a top view);

[0013] Figure 2 The embodiment of the utility model provides Figure 1 Middle L partial enlarged view;

[0014] Figure 3 A working state diagram of a movable guide vane disassembly and assembly platform of a mixed flow unit provided by an embodiment of the utility model;

[0015] Figure 4 The embodiment of the utility model provides Figure 3 Middle M partial enlarged view;

[0016] Figure 5 The embodiment of the utility model provides Figure 3 Middle N partial enlarged image;

[0017] Figure 6 The embodiment of the utility model provides Figure 3 A partial enlarged view of the middle Q;

[0018] Figure 7 The embodiment of the utility model provides Figure 3 Middle P partial enlarged view;

[0019] Figure 8 A schematic diagram of the structure of the working platform provided by the embodiment of the utility model;

[0020] In the figure: working platform 1, rotating part 2, bracket 3, runner flange 4, runner 5, wire rope 6, walking mechanism 7, foundation pit lining 8, tensioner 9, second platform 10, bearing 11, fixed shaft 12, fixed ring 13, guide vane 14, guardrail 1a, skirting board 1b, bracket upper pressure plate 3a, bracket lower pressure plate 3b, bolt 3c, flange through hole 4a, runner upper crown 5a, first roller 7a, second roller 7b, third roller 7c, electric drive device 7d, first boss 3a1, second boss 3b1. DETAILED DESCRIPTION

[0021] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0022] See attached Figure 1-8 A platform for disassembling and assembling movable guide vanes of a mixed flow unit comprises a working platform 1, a rotating member 2 and a bracket 3; the bracket 3 is detachably mounted on the top of a runner flange 4, the rotating member 2 mounted on the top of the bracket 3 is connected to the working platform 1 through a wire rope 6, and the rotating member 2 can make a rotary motion along the axis of a runner 5; a walking mechanism 7 is installed at the bottom of the working platform 1, and the walking mechanism 7 comprises a first roller 7a supported on the top of a runner upper crown 5a of the runner 5, a second roller 7b abutting against the outer cylindrical surface of the runner upper crown 5a, and a third roller 7c supported on a foundation pit lining 8.

[0023] The utility model unit movable guide vane disassembly and assembly platform comprises a work platform 1, the bottom of which is installed with a first roller 7a for supporting the top of the runner crown 5a of the runner 5 and a third roller 7c supported on the foundation pit lining 8, and the erection of the work platform 1 is completed by setting the first roller 7a and the third roller 7c; the work platform 1 is connected with the rotating member 2 through a steel wire 6, so that the second roller 7b installed at the bottom of the work platform 1 abuts against the outer cylindrical surface of the runner crown 5a. Under the restraint of the steel wire 6, and then driven by the driving device of the walking mechanism 7, the second roller 7b moves in the circumferential direction along the outer cylindrical surface of the runner crown 5a, thereby driving the work platform 1 to make a circular motion along the axis of the runner 5, so as to meet the need of position movement when disassembling and assembling the guide vanes, simplify the movement of the work platform, and improve safety and work efficiency.

[0024] Furthermore, a tensioner 9 is installed on the steel wire rope 6. Through the setting of the tensioner 9, the steel wire rope 6 maintains tension on the working platform 1 to ensure stable operation of the working platform.

[0025] Furthermore, the first roller 7a and the second roller 7b are respectively connected to the electric driving device 7d to serve as driving wheels.

[0026] Furthermore, the first roller 7a and the third roller 7c are rubber load-bearing rollers.

[0027] For further information, see Figure 3 , Figure 5 When installing the bracket 3 on the top of the runner flange 4, it is necessary to first match and position the first boss 3a1 of the upper bottom plate 3a of the bracket 3 and the second boss 3b1 of the lower bottom plate 3b with the through hole 4a of the runner flange 4, and then connect and fix the upper bottom plate 3a and the lower bottom plate 3b with the bolts 3c to complete the installation of the bracket 3 on the top of the runner flange 4.

[0028] For further information, see Figure 6 A bearing 11 is installed on the top of the bracket 3 through a fixed shaft 12, the inner ring of the bearing 11 is connected to the fixed shaft 11, the outer ring of the bearing 11 is connected to the rotating member 2, and the rotating member 2 is connected to the wire rope 6 through a fixed ring 13.

Claims

1. A platform for disassembling and assembling movable guide vanes of a mixed flow unit, characterized in that: It comprises a working platform (1), a rotating part (2), and a bracket (3); The bracket (3) is detachably mounted on the top of the wheel flange (4); the rotating member (2) mounted on the top of the bracket (3) is connected to the working platform (1) via a steel wire rope (6); and the rotating member (2) can perform rotational motion along the axis of the wheel (5); A walking mechanism (7) is installed at the bottom of the working platform (1), and the walking mechanism (7) comprises a first roller (7a) supported on the top of the upper crown (5a) of the rotating wheel (5), a second roller (7b) abutting against the outer cylindrical surface of the upper crown (5a) of the rotating wheel, and a third roller (7c) supported on the foundation pit lining (8).

2. The movable guide vane disassembly and assembly platform of a mixed flow unit according to claim 1, characterized in that: A tensioner (9) is installed on the steel wire rope (6).

3. The movable guide vane disassembly and assembly platform of a mixed flow unit according to claim 2, characterized in that: The first roller (7a) and the second roller (7b) are respectively connected to an electric drive device (7d).

4. A Francis unit movable guide vane disassembly and assembly platform according to claim 3, characterized in that: The first roller (7a) and the third roller (7c) are rubber load-bearing rollers.

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