CN116117230A

CN116117230A - Shearing tool for being compatible with spent fuel assemblies of different specifications

Info

Publication number: CN116117230A
Application number: CN202211692990.0A
Authority: CN
Inventors: 罗方祥; 高峰; 郑卫芳; 李海; 周科源; 明玉周; 董碧波; 王日腾
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-16

Abstract

The embodiment of the invention discloses a shearing tool for being compatible with spent fuel assemblies of different specifications. The spent fuel assembly is hexagonal, the cutter includes: the knife edge of the fixed knife is provided with a first groove matched with the shape of the spent fuel assembly, and the first groove is trapezoid, belongs to a part of hexagon and is used for accommodating the spent fuel assemblies with different specifications; the movable knife is matched with the fixed knife and used for shearing the spent fuel assembly; when the cutter is used for shearing, the movable cutter and the fixed cutter are arranged in parallel, and the cutting edge of the movable cutter is opposite to the cutting edge of the fixed cutter; the fixed knife is fixedly arranged, the spent fuel assembly is fixed in the first groove, and the movable knife moves relative to the fixed knife and is used for shearing the spent fuel assembly. According to the embodiment of the invention, the fixed knife is arranged to be of a profiling structure which is suitable for the spent fuel assembly, so that the cutter is suitable for shearing the hexagonal special spent fuel assembly.

Description

Shearing tool for being compatible with spent fuel assemblies of different specifications

Technical Field

The embodiment of the invention relates to the technical field of spent fuel aftertreatment, in particular to a shearing tool for being compatible with spent fuel assemblies of different specifications.

Background

At present, the post-treatment of the spent fuel assembly generally needs to be performed with the processes of shearing the spent fuel assembly, dissolving fuel pellets, chemically separating and recovering fission products, and the like, so that the purpose of recycling nuclear fuel is achieved.

Wherein, for the hexagonal special spent fuel assembly, the outer part of the special spent fuel assembly is enveloped by a hexagonal stainless steel outer sleeve. The spent fuel assembly has a complex and special structure, and most of the shearing cutters used at present are not suitable for shearing the hexagonal spent fuel assembly.

Disclosure of Invention

According to one aspect of the present invention, a shear tool for compatibility with different gauge spent fuel assemblies is provided. Wherein, the cross-section of spent fuel subassembly is the hexagon, the cutter includes: the knife edge of the fixed knife is provided with a first groove matched with the shape of the spent fuel assembly, the first groove is trapezoid, and the trapezoid belongs to a part of hexagon and is used for accommodating the spent fuel assemblies with different specifications; the movable knife is matched with the fixed knife and used for shearing the spent fuel assembly; when the cutter is used for shearing, the movable cutter and the fixed cutter are arranged in parallel, and the cutting edge of the movable cutter is opposite to the cutting edge of the fixed cutter; the fixed knife is fixedly arranged, the spent fuel assembly is fixed in the first groove, and the movable knife moves relative to the fixed knife and is used for shearing the spent fuel assembly.

According to the embodiment of the invention, the fixed knife is arranged to be of a profiling structure which is suitable for the spent fuel assembly, so that the outline of the spent fuel assembly can be overlapped with the knife edge of the fixed knife, the spent fuel assembly can be fixed to a certain extent during shearing, displacement of the spent fuel assembly is prevented, the uniformity and stability of stress of the spent fuel assembly are ensured, and the cutter is suitable for shearing hexagonal special spent fuel assemblies with different specifications.

Drawings

Other objects and advantages of the present invention will become apparent from the following description of embodiments of the present invention, which is to be read in connection with the accompanying drawings, and may assist in a comprehensive understanding of the present invention.

Fig. 1 is a schematic view of an application scenario of a shearing tool for compatibility with different specifications of spent fuel assemblies according to an embodiment of the invention.

Fig. 2 is a schematic view of an application scenario of a tool according to another embodiment of the invention.

Fig. 3 is a schematic view of an application scenario of the tool of fig. 2 at another viewing angle.

Fig. 4 is a schematic structural view of the stationary blade and the mount according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of the stationary blade and the mounting base in fig. 4 from another perspective.

FIG. 6 is a schematic illustration of the installation of a spent fuel assembly and stationary cutter according to one embodiment of the invention.

Fig. 7 is an enlarged view at a in fig. 4.

Fig. 8 is a schematic view of a movable blade and a movable blade holder according to an embodiment of the present invention.

Fig. 9 is a schematic view of the movable blade and the movable blade holder of fig. 8 from another view.

Fig. 10 is a schematic structural view of a movable blade according to an embodiment of the present invention.

Fig. 11 is a schematic view of the movable blade of fig. 10 from another perspective.

It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

Reference numerals illustrate:

110. fixing the knife; 111. a knife edge; 112. a first groove;

120. a mounting base; 121. a second groove;

210. a movable knife; 211. a blade; 2111. a blade plane; 212. a connection plane;

220. moving the tool apron; 221. a moving wheel;

300. a spent fuel assembly; 400. and a pressing member.

Detailed Description

For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It will be apparent that the described embodiments are one embodiment of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments.

It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which this application belongs. If, throughout, reference is made to "first," "second," etc., the description of "first," "second," etc., is used merely for distinguishing between similar objects and not for understanding as indicating or implying a relative importance, order, or implicitly indicating the number of technical features indicated, it being understood that the data of "first," "second," etc., may be interchanged where appropriate. If "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "A and/or B" including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. Furthermore, for ease of description, spatially relative terms, such as "above," "below," "top," "bottom," and the like, may be used herein merely to describe the spatial positional relationship of one device or feature to another device or feature as illustrated in the figures, and should be understood to encompass different orientations in use or operation in addition to the orientation depicted in the figures.

The embodiment of the invention provides a shearing tool for being compatible with spent fuel assemblies of different specifications. Referring to fig. 1 to 3, the cutter in the embodiment of the present invention includes a stationary cutter 110 and a movable cutter 210. As shown in fig. 4 and 5, the fixed blade 110 is provided with a first groove 112 matching the shape of the spent fuel assembly 300, and the first groove 112 is used for accommodating hexagonal spent fuel assemblies 300 with different specifications. The movable blade 210 cooperates with the stationary blade 110 for shearing the hexagonal spent fuel assembly 300. When the cutter in the present embodiment is used to shear the spent fuel assembly 300, the movable cutter 210 is disposed in parallel with the stationary cutter 110, and the cutting edge 211 of the movable cutter 210 is opposite to the cutting edge 111 of the stationary cutter 110. Meanwhile, the fixed blade 110 is fixedly arranged and immovably, the spent fuel assembly 300 is fixed in the first groove 112, and the movable blade 210 moves relative to the fixed blade 110 for shearing the hexagonal spent fuel assembly 300.

In this embodiment, the fixed blade 110 is set to a profiling structure adapted to the spent fuel assembly, so that the profile of the spent fuel assembly 300 can be overlapped with the blade 111 of the fixed blade 110, and the hexagonal special spent fuel assembly 300 can be fixed to a certain extent during shearing, so as to prevent displacement of the spent fuel assembly, ensure uniformity and stability of stress of the spent fuel assembly 300, and facilitate shearing of the spent fuel assembly 300. Meanwhile, the fixed knife 110 is always in a fixed state in the shearing process and can bear the shearing and compacting force, so that the shearing of the spent fuel assembly 300 is realized by being matched with the movable knife 210.

In some embodiments, as shown in fig. 2 and 3, the spent fuel assembly 300 may be compressed in the first groove 112 by the compression member 400, thereby securing the spent fuel assembly 300.

Further, the first groove 112 has a trapezoid shape, which is a part of a hexagon, so that when the spent fuel assembly 300 is fed into the first groove 112, one face of the hexagon-shaped spent fuel assembly 300 is attached to the bottom face of the first groove 112, so that the pressing member 400 can be attached to one face of the spent fuel assembly 300 and pressed tightly, so as to press the spent fuel assembly 300 into the first groove 112. Compared with the case that the V-shaped groove can press the pressing member 400 against one edge of the spent fuel assembly 300, the spent fuel assembly 300 in the embodiment can be pressed into the first groove 112 more stably, and uniformity and stability of stress are further ensured.

In this embodiment, the first groove 112 may accommodate the hexagonal spent fuel assemblies 300 with different specifications, so as to be compatible with the spent fuel assemblies 300 with different specifications, and realize cutting of the spent fuel assemblies 300 with different specifications. The first groove 112 may receive a spent fuel assembly 300 that matches the size of the first groove 112 such that three sides of the hexagonal spent fuel assembly 300 fully coincide with the contour of the first groove 112. As shown in fig. 6, the first groove 112 may further accommodate a plurality of hexagonal spent fuel assemblies 300 with different specifications, which have dimensions smaller than those of the first groove 112, where two sides of the hexagonal spent fuel assemblies 300 overlap with the contour of the first groove 112, so as to be compatible with the spent fuel assemblies 300 with different specifications.

As shown in fig. 7, the edge of the knife edge 111 of the fixed knife 110 is rounded, so as to avoid damage caused by stress concentration and prolong the service life of the fixed knife 110.

Referring to fig. 3 and 4, the tool in this embodiment further includes a mounting base 120. The stationary blade 110 is fixed to the mount 120. The cutter in this embodiment can be used in a shearer of a spent fuel assembly, so that when in use, the mounting seat 120 can be fixedly arranged in the shearer, and the fixed knife 110 is fixed on the mounting seat 120, thereby realizing the fixation of the fixed knife when in use and preventing the displacement thereof.

Further, the mounting base 120 is provided with a fixed knife mounting slot, which is matched with the fixed knife 110, so that the fixed knife 110 can be fixed in the fixed knife mounting slot, and the knife edge 111 of the fixed knife 110 can be exposed out of the fixed knife mounting slot, so that the fixed knife 110 can bear shearing and compacting force. Specifically, the fixed blade mounting slot may be disposed on one side of the mounting base 120, and the blade edge of the fixed blade 110 coincides with the edge of the mounting base 120, the length, width and height of the mounting base 120 are all greater than those of the fixed blade 110, and the fixed blade 110 is located at the center of the mounting base 120 in the height direction, so that the fixed blade 110 is stably fixed on the mounting base 120.

Specifically, the stationary blade 110 may be fixed to the mount 120 by bolts. For example, corresponding mounting holes are formed in the fixed blade 110 and the mounting base 120, and bolts pass through the mounting holes in the fixed blade 110 and the mounting base 120 and are locked by nuts, so that the fixed blade 110 is fixed on the mounting base 120.

In this embodiment, the mounting seat 120 is further provided with a second groove 121 matching the shape of the spent fuel assembly 300, the second groove 121 is located on the same side of the mounting seat 120 as the first groove 112, and the first groove 112 and the second groove 121 are used together to accommodate a part of the hexagonal spent fuel assembly 300, so that the spent fuel assembly is more stably pressed in the fixed knife 110.

Specifically, the second groove 121 is disposed on the mounting seat 120 on the side where the fixed blade 110 is mounted, and the projections of the first groove 112 and the second groove 121 on the plane parallel to the shearing direction are overlapped, so that the cross-sectional shapes and dimensions of the first groove 112 and the second groove 121 are the same, and the first groove and the second groove can be used for accommodating the hexagonal spent fuel assembly 300 together, so as to increase the stability of the spent fuel assembly 300. The "shearing direction" according to the present invention refers to the moving direction of the movable blade 210.

Referring to fig. 8 to 11, the movable blade 210 in the present embodiment has a straight edge. That is, the movable knife 210 in the present embodiment is a flat knife, so that the entire set of shearing can be performed without breaking the outer sleeve of the hexagonal spent fuel assembly 300, and further the shearing efficiency of the hexagonal special spent fuel assembly is improved.

Further, the edge of the blade 211 of the movable blade 210 is a blade plane 2111 perpendicular to the shearing direction of the movable blade 210, so that the cross section of the blade 211 is right trapezoid. Compared with the cutting edge which is commonly used in the related art and has a triangular cross section and a tip edge, the cutting edge 211 of the movable knife 210 is provided with the cutting edge plane 2111 with a certain width in the embodiment, so that the abrasion and tipping of the cutting edge 211 can be prevented, and the service life of the movable knife can be prolonged.

Referring to fig. 8 and 9, the tool in the present embodiment further includes a movable tool holder 220, and the movable tool 210 is mounted on the movable tool holder 220. The movable blade holder 220 is movable to drive the movable blade 210 mounted thereon to move relative to the fixed blade 110, so as to realize the movement of the movable blade 210 for shearing.

In this embodiment, the movable cutter holder 220 is provided with a movable cutter mounting groove, which is matched with the movable cutter 210, the movable cutter 210 can be fixed in the movable cutter mounting groove, and the cutting edge of the movable cutter 210 is exposed out of the movable cutter mounting groove so as to facilitate cutting.

Specifically, the movable blade holder 220 is in a cube shape, the movable blade mounting groove is also in a cube shape, the movable blade mounting groove can be formed on one side surface of the movable blade holder 220, the movable blade 210 is mounted in the movable blade mounting groove, and the blade 211 is not attached to the surface of the movable blade mounting groove, so that the blade can cut. And the length, width and height of the movable blade holder 220 are greater than those of the movable blade 210, and the movable blade 210 is positioned at the center of the movable blade holder 220 in the height direction, so that the movable blade 210 is stably fixed to the movable blade holder 220.

Alternatively, the movable blade 210 may be fixed to the movable blade holder 220 by bolts. For example, corresponding mounting holes are provided on the movable blade 210 and the movable blade holder 220, and bolts pass through the mounting holes on the movable blade 210 and the movable blade holder 220 and are locked by nuts, thereby fixing the movable blade 210 on the movable blade holder 220.

Referring to fig. 10 and 11, in some embodiments, a connection plane 212 is further provided at the junction of the blade 211 of the movable blade 210 and the body of the movable blade 210, the connection plane 212 being parallel to the blade plane 2111, and the bevel of the blade 211 being connected between the blade plane 2111 and the connection plane. The connecting plane 212 is arranged on the movable knife 210 in the embodiment, so that the movable knife 210 can be conveniently installed and fixed in the movable knife installation groove.

As shown in fig. 8 and 9, the bottom of the movable blade holder 220 in the present embodiment has a movable wheel 221, and the movable blade holder 220 and the movable blade 210 can be driven to move by the rotation of the movable wheel 221 to realize cutting. Specifically, in use, the movable blade holder 220 and the mount 120 of the stationary blade 110 are disposed in the shear, and the movable blade holder 220 may be pushed by an external driving member such that the movable blade holder 220 advances toward the stationary blade 110 with the rotation of the movable wheel 221 at the bottom thereof to effect shearing. Compared with the fixed knife and the movable knife of the vertical shearing machine in the related art which are arranged up and down and the movable knife moves up and down, the movable knife 210 in the embodiment of the application moves forward or backward relative to the fixed knife 110 when in use, the gravity of the movable knife 210 is not needed to be overcome, the shearing process is smoother and more convenient, and the time and the labor are saved.

In the present embodiment, when in use, the fixed knife 110 and the movable knife 210 are staggered, so that a preset gap is provided between the fixed knife 110 and the movable knife 210, thereby ensuring smooth shearing of the spent fuel assembly 300 and preventing the fixed knife 110 from obstructing movement of the movable knife 210. Specifically, the preset gap between the fixed blade 110 and the movable blade 210 may be set according to actual needs, for example, the preset gap of about 0.3mm is set between the fixed blade 110 and the movable blade 210 in this embodiment to ensure that the shearing is smooth.

When the cutter in the embodiment of the invention is used for shearing, the spent fuel assembly 300 can be conveyed into the trapezoid first groove 112 of the knife edge of the fixed knife 110 according to a certain length, and the spent fuel assembly 300 is tightly pressed in the first groove 112 by driving the pressing piece 400 to advance, so that the outer sleeve of the spent fuel assembly 300 is completely overlapped with the knife edge 111 of the fixed knife 110, and the stress of the knife edge is uniform and stable during shearing. Then, the movable blade holder 220 is controlled to move horizontally towards the fixed blade 110 with the movable blade 210 at a predetermined speed until the spent fuel assembly 300 is sheared, thereby completing the shearing of the whole set of the spent fuel assembly 300. The cutter provided by the embodiment of the invention is suitable for shearing the whole group of hexagonal spent fuel assemblies, and has high shearing efficiency.

It should also be noted that, in the embodiments of the present invention, the features of the embodiments of the present invention and the features of the embodiments of the present invention may be combined with each other to obtain new embodiments without conflict.

The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.

Claims

1. A shear tool for compatibility with different gauge spent fuel assemblies, the spent fuel assemblies having a hexagonal cross section, the tool comprising:

the knife edge of the fixed knife is provided with a first groove matched with the shape of the spent fuel assembly, the first groove is trapezoid, and the trapezoid belongs to a part of hexagon and is used for accommodating the spent fuel assemblies with different specifications;

the movable knife is matched with the fixed knife and used for shearing the spent fuel assembly;

when the cutter is used for shearing, the movable cutter and the fixed cutter are arranged in parallel, and the cutting edge of the movable cutter is opposite to the cutting edge of the fixed cutter; the fixed knife is fixedly arranged, the spent fuel assembly is fixed in the first groove, and the movable knife moves relative to the fixed knife and is used for shearing the spent fuel assembly.

2. The cutter of claim 1, wherein the knife edge of the stationary knife is provided as a rounded corner.

3. The tool according to claim 1, further comprising: a mounting base; the fixed knife is fixed on the mounting seat.

4. The cutter of claim 3, wherein the mounting base is provided with a stationary blade mounting slot, the stationary blade mounting slot is matched with the stationary blade, the stationary blade is fixed in the stationary blade mounting slot, and a blade edge of the stationary blade is exposed out of the stationary blade mounting slot.

5. The tool of claim 4, wherein the mounting base is provided with a second groove matching the shape and size of the spent fuel assembly;

the second groove is positioned on the same side of the first groove on the mounting seat, and the first groove and the second groove are used for containing part of the hexagonal spent fuel assembly.

6. The tool according to claim 1, wherein the edge of the movable blade is straight.

7. The knife of claim 6 wherein the knife edge of the movable knife is a knife edge plane perpendicular to the direction of movement of the movable knife and the knife edge has a right trapezoid cross-section.

8. The tool according to claim 1, wherein the tool further comprises: the movable knife seat is arranged on the movable knife seat;

the movable tool apron can move and is used for driving the movable tool to move.

9. The tool according to claim 8, wherein the bottom of the movable tool holder is provided with a movable wheel, and the movable tool holder and the movable tool are driven to move by the movable wheel.

10. The tool according to claim 8, wherein the movable tool holder is provided with a movable tool mounting groove, the movable tool mounting groove is matched with the movable tool, the movable tool is fixed in the movable tool mounting groove, and the cutting edge of the movable tool is exposed out of the movable tool mounting groove.

11. The tool according to claim 1, wherein the stationary knife and the movable knife are staggered when the tool is in use.