Upper and lower rotor step ladder device

Abstract

The utility model relates to a step ladder device with upper and lower rotors. The step ladder device comprises a base, the base is a counterweight base; the step ladder device further comprises a step ladder, the front end of the step ladder is connected with the base, and the step ladder turns over with the front end of the step ladder as the center. The step ladder is composed of at least two sections of extension ladders, and the rear section of extension ladder is installed on the front section of extension ladder and stretches out and draws back from the tail end of the front section of extension ladder among the sections of extension ladders. The counterweight base is used as a support, when the step ladder turns over, stretches out and draws back and is maintained, a maintainer enters and exits from the position above a rotor of the step ladder assembly, and when the rotor is hoisted in or out, the step ladder is folded and does not affect hoisting in or hoisting out of the rotor.

Description

Technical Field

[0001] The utility model relates to a maintenance step ladder, in particular to an upper and lower rotor step ladder device. Background Art

[0002] Generator sets are regularly overhauled at Class A levels. When hoisting in and out the rotor, the factory crane is connected to the existing fixed step ladder, which affects the rotor hoisting. It needs to be installed and disassembled once before hoisting out the rotor and once after hoisting in the rotor. It cannot be used during the period from the connection of the crane to the hoisting out of the rotor, and from the hoisting in of the rotor to the disassembly of the crane. During this period, the staff need to climb over the stator frame and winding to work above the rotor, which poses a risk of equipment damage caused by falling or trampling, and repeated disassembly and assembly affect construction efficiency and linear construction period. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes an upper and lower rotor ladder device, which is supported by a counterweight base. The ladder can be flipped and extended. During maintenance, the ladder is placed above the rotor for maintenance personnel to enter and exit. When the rotor is hoisted in or out, the ladder can be folded up without affecting the hoisting in or out of the rotor.

[0004] The technical solution of this utility model:

[0005] An upper and lower rotor step ladder device, the step ladder device includes a base; the base is a counterweight base; the step ladder device also includes a step ladder, the front end of the step ladder is connected to the base, and the step ladder flips with its front end as the center;

[0006] The step ladder is composed of at least two telescopic ladder sections, and between each telescopic ladder section, the rear telescopic ladder section is installed on the front telescopic ladder section, and is telescoped by the end of the front telescopic ladder section.

[0007] When the step ladder is composed of two telescopic ladder sections, the rear telescopic ladder section is stacked on the front telescopic ladder section and is slidably connected to the front telescopic ladder section. A wire rope buckle is installed at the front end of the rear telescopic ladder section, and a rope collector is installed on the base. The front end of a steel wire rope is connected to the rope collector and the end is connected to the wire rope buckle. The rope collector retracts and releases the steel wire rope.

[0008] The rope collecting device is a hand-cranked type.

[0009] A supporting frame is installed under each telescopic ladder section.

[0010] The end of the step ladder is mounted on a plurality of supporting legs.

[0011] A rotating shaft is installed on the base, and the front end of the step ladder is fixedly connected to the rotating shaft;

[0012] A worm gear mechanism is installed on the base, and the worm gear mechanism is connected to the rotating shaft. The worm gear mechanism drives the rotating shaft to rotate and drives the step ladder to flip with its front end as the center.

[0013] The worm gear mechanism is driven by a hand wheel or a motor.

[0014] The top of the base is a platform, with guardrails installed on both sides to form a passage for entering and exiting the staircase;

[0015] The passage opening is provided with a door.

[0016] A plurality of casters and a plurality of supporting feet are installed below the base.

[0017] A step is arranged on the side of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the upper and lower rotor step ladder device (in use status).

[0019] In the figure, a base 1, a step ladder 2, a telescopic ladder 2-1, a wire rope buckle 3, a rope retractor 4, a wire rope 5, a support column 6, a support foot I 7, a rotating shaft 8, a worm gear mechanism 9, a guardrail 10, a passage 11, a door 12, casters 13, and a support foot II 14. DETAILED DESCRIPTION

[0020] As shown in the figure, the up and down rotor step ladder device includes a base 1; the base 1 is a counterweight base; the step ladder device also includes a step ladder 2, the front end of the step ladder 2 is connected to the base 1, and the step ladder 2 is turned around with its front end as the center; when the step ladder 2 is composed of two telescopic ladders 2-1, the rear telescopic ladder is stacked on the front telescopic ladder and connected with the front telescopic ladder in a sliding manner between the two telescopic ladders 2-1, and a wire rope buckle 3 is installed at the front end of the rear telescopic ladder, and a rope collector 4 is installed on the base 1, and the front end of the wire rope 5 is connected to the rope collector 4 and the end is connected to the wire rope buckle 3, and the rope collector 4 retracts and releases the wire rope; the rope collector 4 is a hand-cranked type; each telescopic ladder 2-1 A support frame 6 is installed at the bottom; the ends of the step ladder 2 are installed on two supporting feet Ⅰ7; a rotating shaft 8 is installed on the base 1, and the front end of the step ladder 2 is fixedly connected to the rotating shaft 8; a worm gear mechanism 9 is installed on the base 1, and the worm gear mechanism 9 is connected to the rotating shaft 8, and the worm gear mechanism 9 drives the rotating shaft 8 to rotate and drive the step ladder 2 to flip with its front end as the center; the worm gear mechanism 9 is driven by a handwheel; the top of the base 1 is a platform, and guardrails 10 are installed on both sides of it, forming a passage 11 for entering and exiting the step ladder; a door 12 is installed at the mouth of the passage 11; four casters 13 and four supporting feet Ⅱ14 are installed at the bottom of the base 1; a step is arranged on one side of the base 1.

[0021] When the above-mentioned upper and lower rotor step ladder device is used,

[0022] Move it to the hall of the factory building, so that the four supporting feet II 14 under the base 1 are supported on the floor (upper) of the hall of the factory building, turn the hand wheel, the worm gear mechanism 9 drives the rotating shaft 8 to rotate, and drives the step ladder 2 to flip around the front end, tilting downward, and the rope retractor 4 releases the wire rope 5. The rear telescopic ladder extends from the end of the front telescopic ladder under its own weight, and the two supporting feet I 7 at the end of the step ladder 2 are supported on the maintenance platform (lower);

[0023] The rope retractor 4 retracts the steel wire rope 5, and the steel wire rope 5 pulls the rear telescopic ladder to move, so that the rear telescopic ladder is retracted from the end of the front telescopic ladder to make room for the rotor to be hoisted in or out.

[0024] Of course, the support frame 6 is detachable. When the step ladder device is moved up and down, it can be loaded and unloaded appropriately to effectively support the step ladder 2 without affecting the turning and extension of the step ladder 2.

[0025] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An upper and lower rotor ladder device, the ladder device comprising a base; characterized in that: The base is a counterweight base; the step ladder device also includes a step ladder, the front end of the step ladder is connected to the base, and the step ladder flips with its front end as the center; The step ladder is composed of at least two telescopic ladder sections, and between each telescopic ladder section, the rear telescopic ladder section is installed on the front telescopic ladder section, and is telescoped by the end of the front telescopic ladder section.

2. The upper and lower rotor step device according to claim 1, characterized in that: When the step ladder is composed of two telescopic ladder sections, the rear telescopic ladder section is stacked on the front telescopic ladder section and is slidably connected to the front telescopic ladder section. A wire rope buckle is installed at the front end of the rear telescopic ladder section, and a rope collector is installed on the base. The front end of a steel wire rope is connected to the rope collector and the end is connected to the wire rope buckle. The rope collector retracts and releases the steel wire rope.

3. The upper and lower rotor step ladder device according to claim 2, characterized in that: The rope collecting device is a hand-cranked type.

4. The upper and lower rotor step ladder device according to claim 1, characterized in that: A supporting frame is installed under each telescopic ladder section.

5. The upper and lower rotor step ladder device according to claim 1, characterized in that: The end of the step ladder is mounted on a plurality of supporting legs.

6. The upper and lower rotor step ladder device according to claim 1, characterized in that: A rotating shaft is installed on the base, and the front end of the step ladder is fixedly connected to the rotating shaft; A worm gear mechanism is installed on the base, and the worm gear mechanism is connected to the rotating shaft. The worm gear mechanism drives the rotating shaft to rotate and drives the step ladder to flip with its front end as the center.

7. The upper and lower rotor step ladder device according to claim 6, characterized in that: The worm gear mechanism is driven by a hand wheel or a motor.

8. The upper and lower rotor step ladder device according to claim 1, characterized in that: The top of the base is a platform, with guardrails installed on both sides to form a passage for entering and exiting the staircase; The passage opening is provided with a door.

9. The upper and lower rotor step ladder device according to claim 1, characterized in that: A plurality of casters and a plurality of supporting feet are installed below the base.

10. The upper and lower rotor step ladder device according to claim 8, characterized in that: A step is arranged on the side of the base.

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