CN219349811U

CN219349811U - Manual wire winding frock of fuel rod

Info

Publication number: CN219349811U
Application number: CN202223169035.7U
Authority: CN
Inventors: 张蒙蒙; 郭天阳; 周续; 郧文婷; 邢文军; 王利娜; 关怀; 张力; 牟岩
Original assignee: China North Nuclear Fuel Co Ltd
Current assignee: China North Nuclear Fuel Co Ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-07-14
Anticipated expiration: 2032-11-28

Abstract

The utility model provides a manual wire winding tool for a fuel rod, which comprises a frame and a heavy hammer support, wherein an end plug locating piece and a group of spiral guide pieces are arranged on the frame, a group of spiral guide pieces are coaxially arranged, the end plug locating piece is connected with a lower end plug of the fuel rod, the fuel rod passes through the group of spiral guide pieces, a rotating ring is sleeved on the fuel rod, a spiral groove is arranged on an inner hole of the rotating ring, a stainless steel wire passes through the spiral groove, and an eccentric wheel is arranged on the heavy hammer support. One end of the stainless steel wire is connected with the lower end plug, and the other end of the stainless steel wire penetrates through the hole on the eccentric wheel to be connected with the heavy hammer. The tool disclosed by the utility model can ensure that the pretightening force of the fuel rod wire winding is within a specified range, and the wire winding pitch meets the requirement of accuracy.

Description

Manual wire winding frock of fuel rod

Technical Field

The utility model relates to the technical field of fuel rod winding, in particular to a manual fuel rod winding tool.

Background

Some fuel assemblies include a plurality of fuel rods, and in order to achieve good cooling of the coolant in the reactor, the fuel rods need to be spaced apart from each other to maintain a predetermined gap between the fuel rods. Spiral wire winding is a method of maintaining a gap by first welding one end of a wire to one end plug of a fuel rod, then winding the wire around the fuel rod at a prescribed pitch (pitch) up to the other end of the fuel rod, and welding the wire to the other end plug. In the winding process, the metal wire is always subjected to a constant tensile force (i.e. pretightening force), so that the metal wire is ensured to be tightly attached to the surface of the fuel rod, and excessive stress is not applied to the cladding tube.

At present, most of domestic fuel rod wire winding processes adopt nonstandard automatic equipment, and automatic wire winding and welding are realized through executing elements such as chucks, air cylinders and the like and control programs. The general structure of the automation device is particularly complex, and the automation device can only be specially used for the wire winding operation of one product, and has higher cost. When the fuel rods with different lengths and diameters need to be wound, other types of automatic equipment are needed to realize winding, and if the original type of automatic equipment is used, the automatic equipment needs to be modified and designed, and special tools and running programs are needed to be manufactured with expense and time. When small batches of wire are wound on a certain type of fuel rod, the method is very uneconomical and seriously affects the production progress.

Disclosure of Invention

The utility model aims to provide a manual filament winding tool for fuel rods, which solves the problems of high filament winding cost and long period of fuel rods with different diameters and lengths.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides a manual wire winding frock of fuel rod, includes frame and weight support, be equipped with end plug spacer and a set of spiral guide piece in the frame, a set of spiral guide piece is coaxial to be set up, the end plug spacer is connected with the lower end plug of fuel rod, the fuel rod passes a set of spiral guide piece, the cover is equipped with the swivel ring on the fuel rod, be equipped with the helicla flute on the hole of swivel ring, the stainless steel wire passes the helicla flute, be equipped with the eccentric wheel on the weight support. One end of the stainless steel wire is connected with the lower end plug, and the other end of the stainless steel wire penetrates through the hole on the eccentric wheel to be connected with the heavy hammer.

As an embodiment, the outer side wall of the rotary ring is provided with a handle which abuts against the spiral guide piece.

As an embodiment, the shaft of the eccentric wheel passes through the weight support to be connected with the crank handle.

As an embodiment, the stainless steel wire is welded to the lower end plug.

As an embodiment, a set of the spiral guide plates are spaced apart.

As an embodiment, the number of the spiral guide pieces mounted on the frame is at least 2.

As an embodiment, the spiral guide piece has a triangular upper portion and a rectangular lower portion before being rolled.

As an embodiment, the upper portion of the spiral guide piece is rolled into a ring shape coaxially with the fuel rod.

As an implementation manner, the weight rack is mounted at the end of the rack and is arranged opposite to the end plug locating piece.

Compared with the prior art, the manual wire winding tool for the fuel rod has the following beneficial effects:

the manual wire winding tool for the fuel rod has the advantages of simple structure, low cost, strong compatibility and short manufacturing period, and can be put into use in a short time. Under the condition of no expense and time for manufacturing special automatic equipment, the utility model can be compatible with fuel rods with different diameters and different lengths, and can be used as a tooling for external filament winding of other subsequent types of fuel rods. The tool can ensure that the pretightening force of the fuel rod wire winding is within a specified range, and the wire winding pitch meets the requirement of accuracy.

Furthermore, the utility model can well ensure the thread pitch and pretightening force of the winding and has reliable quality.

Furthermore, the utility model can be compatible with fuel rod winding wires with various diameters and different lengths, and the tool can be adopted as long as the new product pitch is 150+/-5 mm. When the product is replaced, only a new rotating ring is manufactured according to the diameter of the product, and the guide spiral sheet is increased or decreased according to the length of the product.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a prior art fuel rod illustrating a profiled groove;

FIG. 2 is a schematic structural diagram of a manual filament winding tool for a fuel rod according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a frame according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a rotating ring according to an embodiment of the present utility model;

FIG. 5 is a schematic plan (expanded) view of a spiral guide plate according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a spiral guide piece according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a frame; 2. end plug locating pieces; 3. a rotating ring; 4. a spiral guide piece; 5. a fuel rod; 6. stainless steel wire; 7. a heavy hammer; 8. a weight support; 9. a support wheel; 10. a lower end plug; 11. winding stainless steel; 12. a cladding tube; 13. an upper end plug; 31. a spiral groove; 32. a handle; 81. a hand crank; 82. an eccentric wheel; 101. a special-shaped groove.

Detailed Description

Further details are provided below with reference to the specific embodiments.

For ease of understanding, the fuel rods 5 will be briefly described first. As shown in fig. 1, the main structure of the fuel rod 5 is a cladding tube 11, one end of the main structure is a lower end plug 10 (provided with a special-shaped groove 101), the other end of the main structure is an upper end plug 13, a spiral stainless steel wire winding 11 is arranged outside the fuel rod, and two ends of the stainless steel wire winding are fixed on the lower end plug and the upper end plug by spot welding. In manual wire winding spot welding, one end of the stainless steel wire winding 11 is spot welded to the lower end plug 10 and then wound as required. The utility model is used for realizing the wire winding operation, namely, the stainless steel wire 6 is wound on the surface of the fuel rod according to the pitch and the pretightening force to form the stainless steel wire winding 11.

As shown in fig. 2 to 6, the utility model provides a manual wire winding tool for a fuel rod, which comprises a frame 1, an end plug positioning piece 2, a rotating ring 3, a guiding spiral piece 4, a heavy hammer 7, a heavy hammer bracket 8 and a supporting wheel 9. An end plug locating plate 2, a group of spiral guide plates 4, a supporting wheel 9 and a heavy hammer bracket 8 are arranged on the frame 1. The rotating ring 3 and the weight 7 are separate parts and are not fixed to the frame. A set of helical guide blades 4 are coaxially arranged, the number of helical guide blades 4 being adjusted according to the length of the fuel rod to be wound. The number of the spiral guide sheets 4 arranged on the frame 1 is determined according to the requirement of the winding of the fuel rod, the number of the winding turns on the fuel rod is n, and the number of the spiral guide sheets is n-1. When the fuel rods with different lengths are replaced to be wound, the number of the spiral guide plates 4 can be increased or decreased.

As shown in fig. 2, the frame 1 is mainly constructed by aluminum alloy profiles and is used for fixing end plug positioning plates 2, guiding spiral plates 4, supporting wheels 9, a heavy hammer bracket 8 and the like.

The end plug locating piece 2 can be inserted into a special-shaped groove of the lower end plug 1 of the fuel rod to axially locate and fix the fuel rod.

As shown in fig. 2 to 4, the rotary ring 3 has a ring-shaped structure, and has a spiral groove 31 in an inner hole and a handle 32 on the outside. The rotating ring 3 can be fitted over the fuel rod with the stainless steel wire 6 passing through the helical groove 31. The rotating ring 3 is shifted to enable the stainless steel wire 6 to be wound along a certain direction. When the fuel rod 5 winds, the fuel rod 5 is fixed, the rotating ring 3 drives the stainless steel wire 6 to move, and the stainless steel wire 6 simultaneously performs axial linear movement and circumferential rotation along the guiding spiral sheet 4.

The guide spiral sheet 4 is a core component of a manual wire winding tool, and when the wire is wound, an operator operates the rotating ring to rotate around the fuel rod when being attached to one side of the guide spiral sheet 4. Each guiding flight 4 may provide a pitch. The spiral angle of the guide spiral sheet 4 is determined by calculating the spiral angle of the wire winding on the fuel rod, the stainless steel plate is cut into a specific shape of a plane, and then the stainless steel plate is pressed into a ring shape on a rolling tool, and the straight line of the original guide sheet is changed into a spiral line with the pitch of 150 mm. The design of the guiding spiral sheet 4 converts a complex spiral line into a planar structure, so that the processing and the manufacturing are simple, and the processing and the manufacturing can be completed in a short time. As shown in fig. 5, the guide spiral piece 4 before winding has a triangular shape at the upper part and a rectangular shape at the lower part. As shown in fig. 6, the upper part of the guiding screw 4 is ring-shaped, the guiding screw 4 is made by a fitter, and the process is relatively simple. The guiding spiral sheet 4 is of a plane structure before being rolled, then rolled into a ring shape and mounted on the frame 1 for use. The lower part of the guiding screw 4 is intended to be mounted to the frame 1, in particular to the side walls of the frame 1.

The weight 7 is, for example, a weight of 10Kg, and can provide a pre-tightening force of 98N for the wire winding. The heavy hammer 7 is connected with a steel wire rope and is fixed with the stainless steel wire 6 through a hole on the heavy hammer bracket 8.

As shown in fig. 2, the weight support 8 is fixed at the end of the frame 1, and comprises a handle 81 and an eccentric 82, and the shaft of the eccentric 82 passes through the weight support 8 to be connected with the handle 81. The weight bracket 8 provides support for the weight 7, and converts the gravity in the vertical direction into the pulling force in the horizontal direction, and the crank 81 of the weight bracket 8 can drive the stainless steel wire 6 to rotate around the fuel rod 5. When the wire is wound manually, the rotating ring 3 drives the stainless steel wire 6 to be wound on the fuel rod 5 in a right-handed mode, and if the subsequent wire is not moved, the subsequent wire can be wound on the fuel rod at the rear in a left-handed mode, so that the wire winding operation is hindered. The rotary design of the weight bracket 8 is mainly used for removing the left-handed stainless steel wire behind the rotary ring 3. In the wire winding process, the heavy hammer 7 is connected with the tail end of the stainless steel wire through the heavy hammer support 8 to provide pretightening force, and the tail end of the stainless steel wire is driven to rotate around the fuel rod through the rotation of the crank handle and the eccentric wheel.

The supporting wheel 9 is used for supporting the fuel rod 5, adopts a double-roller structure, reduces the contact area between the support and the fuel rod, and is convenient for the stainless steel wire 6 to continue to wind wires through the supporting position. The supporting wheel 9 is arranged at the right end of the set of spiral guide blades 4.

The wire winding operation process of the utility model is as follows: the stainless steel wire 6 is first cut into pieces 200mm longer than the calculated length of the wire winding, and an excess of 200mm is used for the connection with the weight 7. One end of the stainless steel wire 6 is hand spot welded to a corresponding location on the lower end plug 10. The tool is operated by two persons, the two persons cooperate to put the fuel rod 5 and the stainless steel wire 6 together on the supporting wheel of the manual wire winding tool through the inside of a group of spiral guide plates, the first person sleeves the rotating ring 3 on the fuel rod from one end of the lower end plug 10, the stainless steel wire 6 is put into the spiral groove 31 of the rotating ring 3, and then the lower end plug 10 is fixed on the end plug locating plate 2. And a person B hangs the steel wire rope of the heavy hammer 7 at the tail end of the stainless steel wire 6, so that the preparation work is finished. The first person stands on the left side of the tool, holds the rotating ring 3 by two hands to enable the handle 32 on the rotating ring 3 to be in contact with the guide spiral piece 4, enables the rotating ring 3 to axially move and simultaneously rotate anticlockwise around the fuel rod 5 by two-hand operation, and enables the handle to be in contact with the guide spiral piece in the rotating process. At the same time, the person b rotates the handle 82 of the weight support 8 counterclockwise. The two persons repeat this process until the swivel ring 3 reaches the upper end plug 13. The fuel rod 5 and the stainless steel wire 11 are fixed, the heavy hammer 7 is matched and taken down, redundant stainless steel wires are cut off, the tail end of the stainless steel wires 11 are spot-welded on the upper end plug 13, and the whole wire winding process is finished.

Example 1

The fuel rod with the length of about 3 meters and the diameter of 6mm is wound, the diameter of the stainless steel wire is 1.5mm, 19 spiral guide sheets 4 are arranged on the manufactured manual wire winding tool, the diameter of the inner hole of the rotating ring 3 is 6.2mm, and the groove width is 1.7mm.

Example 2

When the diameter of the stainless steel wire required by the winding of the fuel rod is 1mm and other specifications are as in the embodiment 1, other parts of the tool are not moved, and the product conversion can be completed by only replacing the rotating ring 3 and changing the width of the spiral groove 31 of the inner hole into 1.2 mm. The fuel rods are the same, and the diameters of the stainless steel wires are different, so that only the groove width of the rotating ring is changed.

Example 3

The fuel rod with the length of about 2 meters and the diameter of 8mm is wound, the diameter of the stainless steel wire is 1.5mm, 14 spiral guide sheets 4 are arranged on the manufactured manual wire winding tool, the diameter of the inner hole of the rotating ring 3 is 8.2mm, and the groove width is 1.7mm.

Example 4

When the diameter of the stainless steel wire required by the winding of the fuel rod is 1mm, and the length and the diameter of the fuel rod are as in the embodiment 3, other parts of the tool are not moved, and the winding of a new fuel rod can be performed by only replacing the rotating ring 3 and changing the groove width of the inner hole into 1.2 mm.

When the diameter of the fuel rod is the same as the diameter of the stainless steel wire and the length of the fuel rod is different, calculating the number of the guide plates according to the length; when the diameters of the fuel rods are different, changing the inner hole of the rotating ring; when the diameters of the stainless steel wires are different, the width of the groove in the inner hole of the spiral ring is changed.

The tool provided by the utility model has the advantages of simple structure, low cost, strong compatibility and short manufacturing period. Under the condition of no special automatic equipment for manufacturing cost and time, the fuel rods with different diameters and lengths can be wound by replacing the rotating ring, and the fuel rods can be put into use in a short time. The screw pitch and the pretightening force of the winding wire can be well ensured, and the quality is reliable. The tool can be compatible with the winding of fuel rods with various diameters and different lengths, and can be adopted as long as the new product pitch is 150+/-5 mm. When the product is replaced, a new rotating ring 3 is manufactured according to the diameter of the product, and the guide spiral sheet 4 is increased or decreased according to the length of the product.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a manual wire winding frock of fuel rod, its characterized in that, includes frame (1) and weight support (8), be equipped with end plug spacer (2), supporting wheel (9) and a set of spiral guide piece (4) on frame (1), a set of spiral guide piece (4) coaxial setting, end plug spacer (2) are connected with lower end plug (10) of fuel rod (5), fuel rod (5) pass a set of spiral guide piece (4), the cover is equipped with swivel ring (3) on fuel rod (5), be equipped with helical groove (31) on the hole of swivel ring (3), stainless steel wire (6) pass helical groove (31), be equipped with eccentric wheel (82) on weight support (8), eccentric wheel (82) below is connected with weight (7), stainless steel wire (6) one end with lower end plug (10) are connected, the other end with weight (7) are connected.

2. The manual wire winding tool for fuel rods according to claim 1, characterized in that the outer side wall of the rotating ring (3) is provided with a handle (32), and the handle (32) abuts against the spiral guide piece (4).

3. The manual wire winding tool for fuel rods according to claim 1, wherein the shaft of the eccentric wheel (82) penetrates through the heavy hammer support (8) to be connected with a crank handle (81).

4. A manual wire winding tooling for fuel rods according to claim 1, wherein the stainless steel wire (6) is welded to the lower end plug (10).

5. A manual wire winding tooling for fuel rods according to claim 1, wherein a set of said spiral guide tabs (4) are spaced apart.

6. The manual wire winding tooling for fuel rods according to claim 5, wherein the number of spiral guide pieces (4) mounted on the frame (1) is at least 2.

7. The manual wire winding tool for fuel rods according to claim 5, wherein the upper part of the spiral guide piece (4) before being rolled is triangular, and the lower part of the spiral guide piece is rectangular.

8. The manual wire winding tooling for fuel rods according to claim 7, wherein the upper part of the spiral guide piece (4) is rolled into a ring shape, coaxially with the fuel rod (5).

9. The manual wire winding tool for fuel rods according to claim 1, characterized in that the weight bracket (8) is mounted at the end of the frame (1) and is arranged opposite to the end plug positioning piece (2).