Radioactive rod material cutting jig

Abstract

The embodiment of the present application provides a radioactive rod-shaped material cutting clamp, which comprises: a first clamp block; a second clamp block, which is arranged at an angle with the first clamp block, and has a cutter slot between the first clamp block and the second clamp block; a third clamp block, which is used for cooperating with the first clamp block or the second clamp block to jointly clamp the radioactive rod-shaped material; a displacement member, the third clamp block is arranged on the displacement member, and the displacement member is used for driving the third clamp block to translate to adjust the distance between the third clamp block and the first clamp block or the second clamp block; and a rotating member, the displacement member is arranged on the rotating member, and the rotating member is configured to be able to drive the third clamp block to rotate between a first position and a second position, when the rotating member rotates to the first position, the third clamp block faces the first clamp block, and when the rotating member rotates to the second position, the third clamp block faces the second clamp block. The cutting clamp provided by the present application can realize different cutting of the radioactive rod-shaped material at two angles by using the same cutter.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radioactivity technology, in particular to a cutting clamp for radioactive rod-shaped material. BACKGROUND

[0002] In some cases, it is necessary to cut radioactive rod-shaped material such as spent fuel rods for performance testing. In the related art, a precision cutting of the spent fuel rods is performed in a hot cell using a grinding wheel cutting machine, while a circulating water is used to reduce the surface temperature of the grinding wheel during cutting. The clamp used by the grinding wheel cutting machine to hold the fuel rod only has one of the functions of transverse cutting or longitudinal cutting. If the function switching between transverse cutting and longitudinal cutting is required, the manipulator needs to be operated to replace the clamp, which is difficult to operate and has low work efficiency. SUMMARY

[0003] In view of the above technical problems, the present application provides a cutting clamp for radioactive rod-shaped material, which comprises: a first clamping block; a second clamping block, which is arranged at an angle with the first clamping block, and has a cutting knife groove between the first clamping block and the second clamping block; a third clamping block, which is used to cooperate with the first clamping block or the second clamping block to jointly hold the radioactive rod-shaped material; a displacement member, on which the third clamping block is arranged, and the displacement member is used to drive the third clamping block to translate to adjust the distance between the third clamping block and the first clamping block or the second clamping block; and a rotating member, on which the displacement member is arranged, and the rotating member is configured to be able to drive the third clamping block to rotate between a first position and a second position, when the rotating member is rotated to the first position, the third clamping block faces the first clamping block, and when the rotating member is rotated to the second position, the third clamping block faces the second clamping block.

[0004] The cutting clamp provided by the present application can realize different cutting of the radioactive rod-shaped material at two angles in the hot cell using the same cutting knife. BRIEF DESCRIPTION OF DRAWINGS

[0005] Other objects and advantages of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating the principles of the application.

[0006] Figure 1 and Figure 2 are respectively structural schematic diagrams of different angles of the cutting clamp according to an embodiment of the present application;

[0007] Figure 3 is Figure 1 is an exploded view of the cutting clamp shown in FIG. 1;

[0008] Figure 4 is Figure 1 is a perspective view of the cutting clamp shown in FIG. 1;

[0009] Figure 5 is Figure 4 is a partial enlarged view of the cutting clamp shown in FIG. 1;

[0010] Figure 6 is a structural schematic diagram of a cutting clamp according to another embodiment of the present application;

[0011] Figure 7 is Figure 6 is a top view of the cutting clamp shown in FIG. 1;

[0012] Figure 8 is Figure 7 is a sectional view of the cutting clamp shown in FIG. 1 along the direction of A-A;

[0013] Figure 9 is Figure 6 is an exploded view of the cutting clamp shown in FIG. 1.

[0014] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are merely shown in a schematic manner so as not to obscure the understanding of the reader.

[0015] Explanation of Reference Signs:

[0016] 10, cutting platform; 101, cutting knife slot; 11, first clamping block; 12, second clamping block; 13, third clamping block; 14, base; 141, arc-shaped sliding slot; 15, auxiliary clamping block; 151, cross handle;

[0017] 21, push rod;

[0018] 31, rotating shaft; 311, positioning hole; 32, rotating disc; 321, sliding block; 322, first positioning slot; 323, second positioning slot; 324, positioning hole; 325, rotating hole; 326, positioning rod; 327, mounting hole; 33, connecting plate; 331, mounting hole; 34, connecting block;

[0019] 41, positioning pin; 42, sliding slot; 43, handle; 421, locking bayonet; 422, unlocking bayonet;

[0020] 51, shaft sleeve;

[0021] 60, radioactive rod-shaped material;

[0022] 100, blade. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are one embodiment of the present application, rather than all embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0025] In the description of the embodiments of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In related technologies, the spent fuel rod samples that need to be cut have two basic specifications: samples with a diameter of 30 mm and a length of 100 mm, and samples with a diameter of 18 mm and a length of 100 mm. For the 30 mm diameter sample, it is cut radially into small segments with a diameter of 30 mm and a length of 25 mm for testing. For the 18 mm diameter sample, it is cut radially into small segments with a diameter of 18 mm and a length of 15 mm, and then each small segment is longitudinally cut.

[0027] In related technologies, operators need to use a robotic arm inside the hot chamber to clamp spent fuel rod samples within a cutting fixture. It's easy to understand that the fixtures used inside the hot chamber typically need to be easy to operate, suitable for operators to use the robotic arm, and also require a simple and reliable structure to reduce the failure rate. Furthermore, they must allow operators outside the hot chamber to easily observe the samples through a lead-glass viewing window on the hot chamber.

[0028] To meet the above requirements, this invention provides a cutting fixture for a radioactive rod-shaped material 60, which can perform two different cuts at different angles on the radioactive rod-shaped material 60 using the same cutting tool in a heated chamber.

[0029] See Figures 1 to 5 The cutting fixture of this invention includes: a first clamping block 11, a second clamping block 12, a third clamping block 13, a displacement component, and a rotating component.

[0030] The second clamping block 12 is angled to the first clamping block 11, and a cutting groove 101 is provided between the first clamping block 11 and the second clamping block 12. The third clamping block 13 is used to cooperate with the first clamping block 11 or the second clamping block 12 to jointly clamp the radioactive rod-shaped material 60. The third clamping block 13 is disposed on a displacement member, which is used to drive the third clamping block 13 to translate to adjust the distance between the third clamping block 13 and the first clamping block 11 or the second clamping block 12, so as to clamp or release the radioactive rod-shaped material 60. The displacement member is disposed on a rotating member, which is configured to drive the third clamping block 13 to rotate between a first position and a second position. When the rotating member rotates to the first position, the third clamping block 13 faces the first clamping block 11; when the rotating member rotates to the second position, the third clamping block 13 faces the second clamping block 12.

[0031] The second clamping block 12 and the first clamping block 11 are arranged at both sides of the cutter slot 101 and are angled, the third clamping block 13 is driven by the rotating member to be opposite to the first clamping block 11 or the second clamping block 12, the radioactive rod-shaped material 60 can be transversely cut or cut at other angles, and the required cutting sample can be obtained. Since the third clamping block 13 is driven by the displacement member to be translated to jointly clamp the radioactive rod-shaped material 60 with the other clamping block, the radioactive rod-shaped material 60 to be cut can be placed between the opposite two clamping blocks by the mechanical hand, and the operation difficulty of the mechanical hand is reduced.

[0032] In some embodiments, the clamp further comprises a base 14 and a limiting member. The rotating member is rotatably arranged on the base 14. The limiting member is arranged on the base 14 and is used to limit the angle of rotation of the rotating member between the first position and the second position. Since the limiting member is arranged, the third clamping block 13 can be rotated to be aligned with the first clamping block 11 or the second clamping block 12 by the mechanical hand when the rotating member is rotated.

[0033] The base 14 is arranged on the cutting platform 10. The cutter slot 101 can be formed by the base 14, and at this time, the first clamping block 11 is also arranged on the base 14. Alternatively, the cutter slot 101 can also be formed by the cutting platform 10, and at this time, the first clamping block 11 and the base 14 are both arranged on the cutting platform 10. The first clamping block 11 can be directly arranged on the cutting platform 10 or can be installed on the cutting platform 10 through another mounting base. The third clamping block 13 can be arranged on the base 14 or can be arranged on the cutting platform 10.

[0034] In some embodiments, the rotating member comprises a rotating shaft 31 and a rotating disc 32. The rotating shaft 31 is rotatably arranged on the base 14. The rotating disc 32 is connected with the rotating shaft 31, the displacement member is arranged on the rotating disc 32, and the bottom of the rotating disc 32 is provided with a sliding block 321. The limiting member is an arc-shaped sliding groove 141 formed on the base 14, and when the rotating disc 32 is rotated, the sliding block 321 slides in the arc-shaped sliding groove 141.

[0035] The rotating shaft 31 can be rotatably connected to the base 14 through a shaft sleeve 51. The rotating disc 32 is provided with a rotating hole 325, and the rotating shaft 31 is inserted into the rotating hole 325. The rotating shaft 31 is provided with a positioning hole 311, the rotating disc 32 is provided with a positioning hole 324, and a positioning rod 326 is inserted into the positioning hole 311 and the positioning hole 324 to connect the rotating shaft 31 and the rotating disc 32, so that the two are synchronously rotated.

[0036] The base can be provided with a recess, and the rotating disc 32 and the positioning member can be located in the recess.

[0037] In some embodiments, the second clamping block 12 and the first clamping block 11 are arranged perpendicular to each other, and the clamp of the present application can realize transverse cutting or longitudinal cutting of the radioactive rod-shaped material 60 by using the same cutter.

[0038] In such an embodiment, the central angle corresponding to the arc-shaped groove 141 can be 90 degrees. The turntable 32 can rotate freely within a 90-degree range. When the slider 321 slides within the arc-shaped groove 141 to both ends of the arc-shaped groove 141, the third clamping block 13 rotates to a first position aligned with the first clamping block 11 or a second position aligned with the second clamping block 12.

[0039] In some embodiments, the clamp further includes a connecting block 34, disposed on the turntable 32 to rotate with the turntable 32, the connecting block 34 having a through hole. The displacement element can be a push rod 21, which passes through the through hole and connects to the third clamping block 13. When the push rod 21 is pushed relative to the connecting block 34 to translate the third clamping block 13, the distance between the third clamping block 13 and the first clamping block 11 or the second clamping block 12 can be adjusted, thereby clamping or releasing the radioactive rod-shaped material 60. The through hole can be located at the center of the connecting block 34.

[0040] The fixture may also include a locking mechanism to lock the push rod 21 in its current position relative to the through hole. When the robot applies a force in a direction perpendicular to the push rod 21, it can drive the rotating turntable 32. In some embodiments, the axis of the rotating shaft 31 is separate from the projected profile of the push rod 21 in a plane perpendicular to the axis (i.e., a horizontal plane), that is, the axis of the rotating shaft 31 and the projected profile of the push rod 21 in the horizontal plane do not coincide. This arrangement reduces the force required for the robot to rotate the connecting block 34 and the turntable 32 together by rotating the push rod 21, making it easier for the operator to remotely operate the robot.

[0041] In some embodiments, the axis of the rotating shaft 31 is separate from the projected outline of the connecting block 34 in the horizontal plane, that is, the axis of the rotating shaft 31 and the projected outline of the connecting block 34 in the horizontal plane do not coincide. This arrangement can maximize the lever arm between the push rod 21 connected to the connecting block 34 and the axis of the rotating shaft 31, thereby further reducing the force required for the robot to rotate the connecting block 34 and the turntable 32 together by rotating the push rod 21, making it easier for the operator to remotely operate the robot.

[0042] like Figure 4 As shown, the center of gravity of the connecting block 34 can be located outside the turntable 32. With this setting, it is easier to use the robotic arm to push the push rod 21 to rotate the turntable 32.

[0043] In some embodiments, the clamp further comprises a connecting plate 33, the connecting block 34 is connected with the rotating disc 32 through the connecting plate 33. The connecting plate 33 is provided with a mounting hole 331, the rotating disc 32 is provided with a mounting hole 327, and the connecting plate 33 and the rotating disc 32 are connected through a fastener penetrating the mounting hole 331 and the mounting hole 327. The mounting hole 331 is outside the connecting block 34, that is, the mounting hole 331 and the projection profile of the connecting block 34 in the horizontal plane are separated from each other. In this way, in the case that the center of gravity of the connecting block 34 is located outside the rotating disc 32, on the one hand, the stability of the connection between the connecting plate 33 and the rotating disc 32 is ensured, and on the other hand, when the rotating disc 32 and the connecting plate 33 shake, the fastener can be tightened by the mechanical hand.

[0044] In some embodiments, the projection of the push rod 21 in the plane partially overlaps with the projection of the rotating disc 32 in the plane, and the projection S of the vertical bisector of the push rod 21 in the length direction in the plane is separated from the projection of the rotating disc 32 in the plane. In this way, part of the weight of the push rod 21 is indirectly supported by the rotating disc 32, which is conducive to the stability of the center of gravity of the connecting block 34 and the push rod 21.

[0045] The first clamping block 11 and the second clamping block 12 can be arranged to face the rotating member. The first clamping block 11 is parallel to the cutter slot 101, so that the radioactive rod-shaped material 60 can be longitudinally cut by the blade.

[0046] The second clamping block 12 can be perpendicular to the cutter slot 101, so that the radioactive rod-shaped material 60 can be transversely cut by the blade. The second clamping block 12 and the rotating member are arranged on the same side of the cutter slot 101, and the first clamping block 11 is arranged on the other side of the cutter slot 101. The surfaces of the first clamping block 11 and the second clamping block 12 facing the rotating member are respectively provided with grooves for accommodating the radioactive rod-shaped material 60. The grooves can be V-shaped grooves, which can fix radioactive rod-shaped materials 60 of different diameters. The grooves can also be U-shaped grooves.

[0047] When the rotating member rotates to the first position, the connecting block 34 and the second clamping block 12 are located on opposite sides of the axis of the rotating shaft 31. When the rotating member rotates to the second position, the connecting block 34 and the first clamping block 11 are located on the same side of the axis of the rotating shaft 31.

[0048] In some embodiments, since the center of gravity of the connecting block 34 is located outside the rotating disc 32, the rotating member may interfere with the first clamping block 11 when the rotating member rotates. In order to ensure the smooth rotation of the rotating disc 32, the distance between the first clamping block 11 and the cutter slot 101 can be increased, thereby providing space for the rotation of the connecting block 34.

[0049] Referring to Figures 6 to 9In such embodiments, the clamp can further comprise an auxiliary clamp block 15, which is detachably arranged on the side of the first clamp block 11 facing the rotating member. The auxiliary clamp block 15, together with the third clamp block 13, clamps the radioactive rod-shaped material 60. It is easy to understand that the distance between the first clamp block 11 and the cutter groove 101 is greater than the radius of the radioactive rod-shaped material 60 to be longitudinally sectioned. When the auxiliary clamp block 15 is arranged, the axis of the radioactive rod-shaped material 60 is aligned with the cutter groove 101.

[0050] The surface of the auxiliary clamp block 15 facing the third clamp block 13 is provided with a recess for accommodating the radioactive rod-shaped material 60. Referring to Figure 7 When the auxiliary clamp block 15 is arranged, the axis of the radioactive rod-shaped material 60 is aligned with the cutter groove 101. The auxiliary clamp block 15 can have a cross handle 151 to facilitate the gripping of the robotic hand.

[0051] In some embodiments, the clamp can further comprise a positioning member arranged on the base 14 and used for positioning the rotating member when the rotating member is rotated to the first position and the second position, so as to keep the rotating member in the first position or the second position.

[0052] Referring to Figure 3 , the rotating member is provided with a first positioning groove 322 and a second positioning groove 323. When the first clamp block 11 and the second clamp block 12 are perpendicular to each other, the axes of the first positioning groove 322 and the second positioning groove 323 are perpendicular to each other.

[0053] The positioning member comprises a sliding groove 42 arranged on the base 14 and a positioning pin 41 slidable along the sliding groove 42. When the rotating member is rotated to the first position, the positioning pin 41 is slidable along the sliding groove 42 to enter the first positioning groove 322. When the rotating member is rotated to the second position, the positioning pin 41 is slidable along the sliding groove 42 to enter the second positioning groove 323.

[0054] The groove wall of the sliding groove 42 is formed with a locking notch 421, and the positioning member can further comprise a handle 43 connected with the positioning pin 41. When the positioning pin 41 enters the first positioning groove 322 or the second positioning groove 323, the handle 43 can be rotated to enter the locking notch 421. The groove wall of the sliding groove 42 is further formed with an unlocking notch 422. When it is needed to rotate the rotating disc 32, the handle 43 is pulled away from the rotating disc 32 to make the positioning pin 41 disengage from the first positioning groove 322 or the second positioning groove 323, and the handle 43 is rotated to enter the unlocking notch 422.

[0055] In some embodiments, the positioning pin 41 is a bolt, and the base 14 is provided with a bolt base, from which the above-mentioned sliding groove 42 is formed, and the bolt is freely reciprocable in the sliding groove 42.

[0056] The use process of the clamp of the present application will be described below in combination with specific embodiments.

[0057] (1) The robot pushes the push rod 21 to make the rotating disc 32 rotate around the rotating shaft 31 to the position where the third clamping block 13 is parallel to the end face of the second clamping block 12, at this time, the robot pushes the plug handle 43 to insert the plug (i.e. the positioning pin 41) into the pin hole (i.e. the second positioning groove 323) of the rotating disc 32 to fix the rotating disc 32.

[0058] (2) The spent fuel rod is floated on the base 14 at the position parallel to the second clamping block 12, the robot pushes the push rod 21 to push the third clamping block 13 to the position of the spent fuel rod, and the push rod 21 is locked.

[0059] (3) The position of the cutter blade 100 of the cutting machine is adjusted, and the parameters such as the movement and feed amount of the cutting machine are set, so that the transverse cutting of the spent fuel rod can be realized.

[0060] (4) The position of the cutter blade 100 of the cutting machine is adjusted, the cutter blade 100 is moved to the empty position, the locking of the push rod 21 is released, the robot pulls the push rod 21 to the maximum position, and the cut spent fuel rod sample is taken out.

[0061] (5) The robot pushes the plug handle 43 to pull out the plug from the pin hole of the rotating disc 32, and the fixing of the rotating disc 32 is released.

[0062] (6) The robot pushes the push rod 21 to make the rotating disc 32 rotate around the rotating shaft 31 to the position where the third clamping block 13 is parallel to the end face of the first clamping block 11, at this time, the robot pushes the plug handle 43 to insert the plug into the pin hole of the rotating disc 32 to fix the rotating disc 32.

[0063] (7) Due to the limitation of the longitudinal cutting position, an auxiliary clamping block 15 needs to be added on the first clamping block 11, the spent fuel rod is floated on the mounting seat of the first clamping block 11 at the position parallel to the auxiliary clamping block 15, the robot pushes the push rod 21 to push the third clamping block 13 to the position of the spent fuel rod, and the push rod 21 is locked at this time.

[0064] (8) The position of the cutter blade 100 of the cutting machine is adjusted, and the parameters such as the movement and feed amount of the cutting machine are set, so that the longitudinal cutting of the spent fuel rod can be realized.

[0065] (9) The position of the cutter blade 100 of the cutting machine is adjusted, the cutter blade 100 is moved to the empty position, the locking of the push rod 21 is released, the robot pulls the push rod 21 to the maximum position, and the cut spent fuel rod sample is taken out.

[0066] At this time, the robot has completed the transverse and longitudinal cutting of the spent fuel rod.

[0067] For the embodiments of the present application, it also needs to be explained that the embodiments and the features in the embodiments can be combined with each other to obtain new embodiments without conflict.

[0068] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cutting fixture for radioactive rod-shaped materials, comprising: First clamping block; The second clamping block is set at an angle to the first clamping block, and a cutting groove is provided between the first clamping block and the second clamping block; The third clamping block is used to cooperate with the first clamping block or the second clamping block to jointly clamp the radioactive rod-shaped material. The displacement member has a third clamping block disposed on it. The displacement member is used to drive the third clamping block to translate so as to adjust the distance between the third clamping block and the first clamping block or the second clamping block. as well as A rotating member, wherein the displacement member is disposed on the rotating member, the rotating member is configured to drive the third clamping block to rotate between a first position and a second position, wherein when the rotating member rotates to the first position, the third clamping block faces the first clamping block, and when the rotating member rotates to the second position, the third clamping block faces the second clamping block; The clamp further includes a base, on which the rotating member is rotatably mounted; The rotating component includes: A pivot is rotatably mounted on the base; A turntable connected to the rotating shaft, and the displacement component disposed on the turntable; The clamp further includes a connecting block, which is disposed on the turntable to rotate with the turntable, and the connecting block is provided with a through hole; The displacement component is a push rod, which passes through the through hole and connects to the third clamping block; The axis of the rotating shaft and the projected outline of the connecting block in the horizontal plane are separate and do not coincide; The projection of the push rod in the plane coincides with the projection of the turntable in the plane, while the projection of the vertical bisecting plane of the push rod along its length in the plane is separate from the projection of the turntable in the plane.

2. The clamp according to claim 1, further comprising: A limiting member is disposed on the base to limit the angle of rotation of the rotating member between the first position and the second position.

3. The clamp according to claim 2, wherein the bottom of the turntable is provided with a slider; The limiting component is an arc-shaped groove formed on the base. When the turntable rotates, the slider slides within the arc-shaped groove.

4. The clamp according to claim 1, further comprising: An auxiliary clamping block is detachably disposed on the side of the first clamping block facing the rotating member.

5. The clamp according to claim 2, further comprising: A positioning element is disposed on the base and is used to position the rotating component when the rotating component rotates to the first position and the second position.

6. The clamp according to claim 5, wherein, The rotating component is provided with a first positioning groove and a second positioning groove. The positioning element includes: a sliding groove disposed on the base and a positioning pin that can slide along the sliding groove. When the rotating component rotates to the first position, the positioning pin can slide along the slide groove into the first positioning groove; when the rotating component rotates to the second position, the positioning pin can slide along the slide groove into the second positioning groove.

7. The clamp according to claim 6, wherein, The groove wall has a locking slot, and the positioning element also includes a handle connected to the positioning pin. When the positioning pin enters the first positioning groove or the second positioning groove, the handle can be rotated to enter the locking slot.

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