CN219534064U

CN219534064U - Overturning tool for fuel basket

Info

Publication number: CN219534064U
Application number: CN202223205324.8U
Authority: CN
Inventors: 马志强; 吴俊�; 秦小军; 何行洲; 杨浩; 郑琦; 周鑫; 张欣; 陈泽威; 吴泽胜; 董彪; 林希贤
Original assignee: Sanmen Nuclear Power Co Ltd
Current assignee: Sanmen Nuclear Power Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-08-15
Anticipated expiration: 2032-12-01

Abstract

A flipping tool for a fuel basket, comprising: the fuel basket fixing frame is used for fixing the fuel lifter, the turnover mechanism is used for vertically turnover the fuel lifter to a horizontal position, the frame is used for installing the turnover mechanism and adjusting the lifting of the turnover mechanism, the tool compensates for the gap of a new fuel lifter fuel basket turnover tool, and the tool has the advantages of safety, simplicity, convenience, reliability, saving, high efficiency and the like, and provides powerful guarantee for efficiently completing the overhaul work of the new fuel lifter.

Description

Overturning tool for fuel basket

Technical Field

The utility model belongs to the technical field of nuclear power station loading and reloading devices, and particularly relates to a turnover tool for a fuel basket.

Background

The new fuel lifter is one of key equipment for feeding new fuel into the pool, and has the main functions of lowering the new fuel assembly from the operation platform to the bottom of the spent fuel pool, and can lift the spent fuel assembly from the bottom of the pool to the height for inspection and repair when the spent fuel assembly is inspected and repaired. And (3) lifting out the new fuel elevator fuel basket during every 5 fuel cycles, and simultaneously carrying out disassembly inspection on the fuel basket guide wheel assembly and the steel wire rope fixed pulley assembly. When the new fuel lifter is disassembled for maintenance, the fuel basket is required to be lifted out of the new fuel lifter, the bottom part of the fuel basket is required to be replaced after the new fuel lifter is lifted out, but when the part is replaced, a person cannot place any part of the body below the fuel basket, and the body is placed below a lifted object in a nuclear power plant to violate the principle of 'ten-no-lifting' and belong to red line violation operation, so that the new fuel lifter is extremely dangerous. At present, when the fuel basket is lifted and overhauled, the fuel basket cannot be overturned, one corner of the fuel basket needs to be firstly contacted with the ground and then is horizontally placed, the problems of time and labor waste, high safety risk, possibility of damaging the fuel basket and the like exist in the method, no matched special tool for overturning the fuel basket exists in the market, and certain difficulty exists in disassembly overhauling of the overturning fuel basket of the new fuel lifter.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a turnover tool for a fuel basket, which is convenient for turning over a fuel lifter and improves the maintenance efficiency of the fuel lifter so as to ensure that a new fuel lifter can reliably work.

In order to solve the technical problems, the utility model adopts the technical proposal that,

a flipping tool for a fuel basket, comprising:

the fuel basket fixing frame is internally provided with an installation cavity for fixing the fuel basket;

and the turnover mechanism is connected with the fuel basket fixing frame and drives the fuel basket fixing frame to rotate.

As a preferable scheme of the utility model, the two ends of the fuel basket fixing frame are detachably provided with locking plates for detachably fixing the fuel basket in the mounting cavity.

As a preferable scheme of the utility model, the lower end of the fuel basket fixing frame is provided with the mounting platform, and the locking plate is detachably fixed on the mounting platform through the pin shaft.

As a preferred scheme of the utility model, the turnover mechanism comprises a turnover frame and a turnover driving piece arranged on the turnover frame, wherein the fuel basket fixing frame is connected with the turnover driving piece, and the turnover driving piece drives the fuel basket fixing frame to rotate.

As a preferred embodiment of the present utility model, the overturn driving member includes a decelerator and a hand chain mounted on an input shaft of the decelerator, and the fuel basket fixing frame is mounted on an output shaft of the decelerator.

As a preferred embodiment of the present utility model, the turnover tool further includes a frame, and the turnover mechanism is liftably installed on the frame to adjust the height of the fuel basket fixing frame.

As a preferable scheme of the utility model, the frame is provided with a chute, and the turnover mechanism is arranged in the chute in a lifting manner.

As a preferable scheme of the utility model, the lifting driving piece is arranged on the frame and is connected with the turnover mechanism to drive the turnover mechanism to lift up and down.

As a preferable scheme of the utility model, the lifting driving piece comprises a movable pulley, a lifting rope and a winch, wherein the movable pulley is arranged on the turnover mechanism, one end of the lifting rope is connected to the frame, the other end of the lifting rope is connected with the winch, and the lifting rope is wound outside the movable pulley.

As a preferable scheme of the utility model, the rack is fixed with a diagonal bracing.

The tool has the beneficial effects that the tool can fix the fuel basket, can turn over the fuel basket easily, realizes the tilting maintenance of the fuel basket, saves labor, thoroughly eliminates the risk of personnel in lowering suspended objects, and improves the maintenance efficiency.

Drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a side view of the present utility model.

Fig. 3 is a schematic view of the structure of the frame.

FIG. 4 is a schematic view of the structure of the fuel basket fixing frame.

Reference numerals: the fuel basket fixing frame 1, the steel pipe frame 1-1, the platform base plate 1-2, the limit seat plate 1-3, the rotating shaft plate 1-4, the mounting cavity 2, the turnover mechanism 3, the locking plate 4, the middle part 4-1, the mounting platform 5, the pin shaft 6, the turnover frame 7, the driving piece mounting plate 7-1, the pulley mounting plate 7-2, the turnover driving piece 8, the speed reducer 10, the hand pulling chain 11, the rack 12, the rack base 12-1, the vertical beam 12-2, the connecting cross beam 12-3, the guide wheel 12-4, the end fixing plate 12-5, the chute 13, the movable pulley 15, the lifting rope 16, the winch 17 and the inclined strut 18.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

A flipping tool for a fuel basket, comprising: the fuel basket fixing frame 1 is used for fixing a fuel basket, the turnover mechanism 3 is used for vertically turnover the fuel basket to a horizontal position, the rack 12 is used for installing the turnover mechanism 3, and the lifting of the turnover mechanism 3 is regulated.

The fuel basket fixing frame 1 comprises a steel pipe frame 1-1, a platform base plate 1-2 and a limit seat plate 1-3, wherein an installation cavity 2 is formed in the steel pipe frame 1-1, in the overturning process, a fuel basket is fixed in the installation cavity 2, the platform base plate 1-2 is fixedly connected to the upper end and the lower end of the steel pipe frame 1-1 in pairs respectively, the front end of the platform base plate 1-2 extends out of the steel pipe frame 1-1 to be arranged, an installation platform 5 is formed on the extending end of the platform base plate 1-2, the locking plate 4 is conveniently and detachably installed on the installation platform 5 through the arrangement of the installation platform 5, the limit seat plate 1-3 is fixedly installed on the side wall of the steel pipe frame 1-1, the limit seat plate 1-3 is located above the installation platform 5, so that a slot is formed between the limit seat plate 1-3 and the installation platform 5, and the locking plate 4 is spliced in the slot.

In order to facilitate rapid disassembly and assembly of the locking plate 4, coaxial through holes are formed in the locking plate 4 and the mounting platform 5, and the locking plate 4 is fixedly mounted on the mounting platform 5 through a pin shaft 6.

In order to facilitate the fixing of the fuel lifting mechanism in the installation cavity 2, the middle part 4-1 of the locking plate 4 extends into the installation cavity 2, so that the end part of the fuel lifting mechanism is abutted by the locking plate 4.

In order to facilitate the connection between the steel pipe frame 1-1 and the turnover mechanism 3, a rotating shaft plate 1-4 is fixedly connected to the rear end of the steel pipe frame 1-1, and the rotating shaft of the turnover mechanism 3 is connected with the rotating shaft plate 1-4.

The turnover mechanism 3 comprises a turnover frame 7 and a turnover driving piece 8, a driving piece mounting plate 7-1 is arranged on the turnover frame 7, the turnover driving piece 8 is fixedly connected with the turnover frame 7 through the driving piece mounting plate 7-1, the fuel basket fixing frame 1 is connected with an output shaft of the turnover driving piece 8, the fuel basket fixing frame 1 is driven to rotate through the turnover driving piece 8, and the fuel basket fixing frame 1 is switched between a vertical state and a horizontal state.

The overturning driving piece 8 comprises a speed reducer 10 and a hand pulling chain 11, the speed reducer 10 is fixed on the driving piece mounting plate 7-1, the hand pulling chain 11 is installed on an input shaft of the speed reducer 10, the fuel basket fixing frame 1 is installed on an output shaft of the speed reducer 10, the hand pulling chain 11 is pulled, and the output shaft of the speed reducer 10 rotates, so that the fuel basket fixing frame 1 is driven to overturn.

In this embodiment, the speed reducer 10 is a worm and gear speed reducer, the hand-pulled chain 11 is connected with a worm shaft, the worm shaft is connected with the fuel fixing frame 1, the hand-pulled chain 11 drives the worm to rotate, and the worm drives the worm to rotate, so that the worm shaft is driven to rotate, and the fuel fixing frame 1 rotates along with the worm shaft.

In order to lift the fuel lifting mechanism during maintenance, the turnover mechanism 3 is installed on the frame 12 in a lifting manner, and the relative height of the turnover mechanism 3 is adjusted through a lifting driving piece, so that the relative height of the fuel basket fixing frame 1 is adjusted.

The frame 12 comprises a frame base 12-1, vertical beams 12-2 and connecting beams 12-3, wherein the vertical beams 12-2 are arranged on the frame base 12-1 in pairs, a sliding groove 13 is formed between the vertical beams 12-2 on the same side, the roll-over stand 7 of the roll-over mechanism 3 is slidably arranged in the sliding groove 13, so that guiding effect is conveniently provided for the up-down lifting of the roll-over stand 7, connecting beams are connected between the vertical beams 12-2 on the same side, a vertical beam assembly is formed, two ends of the connecting beams 12-3 are respectively connected with the vertical beams 12-2, and collision between the roll-over stand 7 and the connecting beams 12-3 in the sliding process is prevented.

The frame 12 is provided with a lifting driving piece which is connected with the turnover mechanism 3 to drive the turnover mechanism 3 to lift up and down.

The lifting driving piece comprises a movable pulley 15, a lifting rope 16 and a winch 17, wherein the movable pulley 15 is arranged on the turnover frame 7 of the turnover mechanism 3, one end of the lifting rope 16 is connected to the frame 12, the other end of the lifting rope 16 is connected with the winch 17, the lifting rope 16 is wound outside the movable pulley 15, the relative height of the movable pulley 15 is changed by winding and unwinding the lifting rope 16 through the winch 17, so that the relative height of the turnover frame 7 is changed, the height of the fuel basket fixing frame 1 is changed, and the speed reducer is convenient to drive the fuel basket fixing frame 1 to rotate relative to the turnover frame 7.

In order to facilitate the fixing and guiding of the lifting rope 16, two guide wheels 12-4 are installed at the upper end of the connecting beam 12-3 through roller seats, the traction direction of the lifting rope 16 is changed through the guide wheels 12-4, an end fixing plate 12-5 is fixedly connected to the lower end face of the connecting beam 12-3, and the end of the lifting rope 16 is fixed in a through hole of the end fixing plate 12-5.

The upper end of the roll-over stand 7 is fixedly connected with a pulley mounting plate 7-2, and a movable pulley 15 is rotatably arranged on the pulley mounting plate 7-2, and the movable pulley 15 can move up and down along with the roll-over stand 7, so that the force required by the winch 17 for winding and unwinding the lifting rope 16 is reduced.

The inclined strut 18 is fixed on the frame 12, and the inclined strut 18 is fixed on one side of the vertical beam 12-2 and the rear end face of the vertical beam 12-2, so that the stability of the frame 12 is improved.

The use method of the turnover tool is as follows,

(1) The winch 17 is used for lifting the fuel basket fixing frame 1 to a proper height, the hand-pulled chain on the turbine worm speed reducer 10 is adjusted, the fuel basket fixing frame 1 is in a vertical state, the pin shaft 6 on the fuel basket fixing frame 1 is pulled out, and the locking plate 4 is detached.

(2) The fuel basket is lifted up by using a lifting tool, and is lifted up into the fuel basket fixing frame 1 where the locking plate 4 is not installed.

(3) The locking plate 4 is inserted into the fuel basket fixing frame 1, and the pin shaft 6 is inserted to fix the fuel basket.

(4) The pulling hand chain drives the turbine worm speed reducer 10 to work, and the turbine worm speed reducer 10 drives the fuel basket fixing frame 1 to rotate relative to the roll-over stand 7, so that the fuel basket fixing frame 1 and the fuel basket are simultaneously rolled over to be horizontal.

(5) The winch is operated, and the fuel basket fixing frame 1 and the fuel basket are lowered to the bottom for maintenance.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model; thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the terms corresponding to the reference numerals in the drawings are used more herein, the possibility of using other terms is not excluded; these terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. A turn-over tool for a fuel basket, comprising:

the fuel basket fixing frame (1), the fuel basket fixing frame (1) is internally provided with a mounting cavity (2) for fixing the fuel basket;

the turnover mechanism (3) is connected with the fuel basket fixing frame (1) and drives the fuel basket fixing frame (1) to rotate;

the turnover mechanism (3) comprises a turnover frame (7) and a turnover driving piece (8) arranged on the turnover frame (7), wherein the fuel basket fixing frame (1) is connected with the turnover driving piece (8), and the fuel basket fixing frame (1) is driven to rotate through the turnover driving piece (8).

2. A tilting tool for a fuel basket according to claim 1, characterized in that locking plates (4) are detachably mounted at both ends of the fuel basket fixing frame (1) for detachably fixing the fuel basket in the mounting chamber (2).

3. The turnover tool for the fuel basket according to claim 2, wherein the lower end of the fuel basket fixing frame (1) is provided with a mounting platform (5), and the locking plate (4) is detachably fixed on the mounting platform (5) through a pin shaft (6).

4. A tilting tool for a fuel basket according to claim 1, characterized in that the tilting drive (8) comprises a decelerator (10) and a hand chain (11), the hand chain (11) being mounted on the input shaft of the decelerator (10), the fuel basket fixing frame (1) being mounted on the output shaft of the decelerator (10).

5. A tilting tool for a fuel basket according to claim 1, further comprising a frame (12), wherein the tilting mechanism (3) is liftably mounted on the frame (12) to adjust the height of the fuel basket fixing frame (1).

6. A tilting tool for a fuel basket according to claim 5, characterized in that the frame (12) is provided with a chute (13), and the tilting mechanism (3) is arranged in the chute (13) in a liftable manner.

7. A tilting tool for a fuel basket according to claim 5, wherein a lifting driving member is mounted on the frame (12), and the lifting driving member is connected to the tilting mechanism (3) to drive the tilting mechanism (3) to lift up and down.

8. A tilting tool for a fuel basket according to claim 7, characterized in that the lifting drive comprises a movable pulley (15), a lifting rope (16) and a winch (17), the movable pulley (15) is mounted on the tilting mechanism (3), one end of the lifting rope (16) is connected to the frame (12), the other end is connected to the winch (17), and the lifting rope (16) is wound outside the movable pulley (15).

9. A tilting tool for a fuel basket according to claim 5, wherein the frame (12) has a diagonal brace (18) secured thereto.