Inner shell cutting device for reactor body decommissioning

Abstract

The invention discloses an inner shell cutting device for reactor body decommissioning, which comprises a pipe cutting workbench, a barrel grabbing arm arranged at the top of the pipe cutting workbench, a shell grabbing arm arranged at the front end of the top of the pipe cutting workbench, and a block grabbing arm arranged at the front end of the top of the pipe cutting workbench. The block grabbing arm is arranged on the right side of the shell grabbing arm, the annular cutting workbench is arranged at the bottom of the pipe cutting workbench, and the slitting workbench is arranged in the pipe cutting workbench. Through cooperation of the body grabbing arm, the block grabbing arm, the annular cutting workbench, the slitting workbench, the inner pipe cutting arm, the grabbing unit and the block cutting arm, accurate control can be achieved, a large amount of radioactive aerosol is reduced during production, the problems of sight blocking and the like are avoided, accurate control can be achieved in the remote operation process, and the working efficiency is improved. Cold cutting can be achieved, radioactive contamination is reduced, and cutting efficiency and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear reactor decommissioning, and in particular to an inner shell cutting device for reactor body decommissioning. Background Art

[0002] After completing its research mission, a nuclear reactor is eventually shut down and enters the decommissioning phase. Reactor decommissioning means that during this period, the nuclear fuel, radioactive equipment, components, and materials in the reactor will be removed from the reactor or removed from the reactor system and the reactor plant area, so that the plant area can be opened for unrestricted use. The reactor decommissioning process mainly consists of three steps: dismantling of equipment, buildings, and systems; decontamination process; and waste treatment.

[0003] In the decommissioning process of a nuclear reactor, cutting the inner shell of the reactor body is a key step. Existing methods for cutting the inner shell mostly use thermal cutting technology, but this method has problems such as generating a large amount of radioactive aerosols and obstructing vision. It is also difficult to achieve precise control during remote operation, and cold cutting cannot be achieved, which increases radioactive contamination and reduces cutting efficiency and safety. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide an inner shell cutting device for decommissioning a reactor body, which has the advantage of being able to achieve precise control and solves the problem that it is difficult to achieve precise control of the inner shell cutting device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an inner shell cutting device for reactor body decommissioning, comprising: Pipe cutting workbench; A barrel grabbing arm, wherein the barrel grabbing arm is arranged on the top of the pipe cutting workbench; A shell grabbing arm, the shell grabbing arm being arranged at the front end of the top of the pipe cutting workbench; A block grabbing arm, the block grabbing arm being arranged on the right side of the shell grabbing arm; A ring cutting workbench, wherein the ring cutting workbench is arranged at the bottom of the pipe cutting workbench; A slitting workbench, wherein the slitting workbench is arranged inside the pipe cutting workbench; An inner tube cutting arm, the inner tube cutting arm being arranged on the back side of the cylinder grabbing arm; A grabbing unit, wherein the grabbing unit is arranged at the bottom of the barrel grabbing arm; The block cutting arm is arranged on the back side of the pipe cutting workbench.

[0006] As a preferred embodiment of the present invention, the pipe cutting workbench includes a main frame, the front end of the left side of the inner wall of the main frame is fixedly connected to the pipe cutting workbench, and the right side of the pipe cutting workbench is movably connected to the FA-IV steel box.

[0007] As a preferred embodiment of the present invention, the shell grabbing arm includes an upper and lower feeding mechanism, the bottom of the upper and lower feeding mechanism is movably connected with a jaw changing mechanism, the bottom of the jaw changing mechanism is movably installed with a thin-walled clamp, the front of the jaw changing mechanism is movably installed with a pipe clamp, the bottom of the upper and lower feeding mechanism is movably installed with a cross beam, and the bottom of the cross beam is fixedly connected to the front end of the top of the main frame.

[0008] As a preferred embodiment of the present invention, the block grabbing arm includes an upper and lower feeding mechanism 2, the bottom of which is fixedly connected to the right side of the top of the beam 1, and the bottom of the upper and lower feeding mechanism 2 is movably installed with a hydraulic clamping mechanism, and the bottom of the hydraulic clamping mechanism is movably connected with a flow distribution chamber, and the flow distribution chamber is a quarter flow distribution chamber.

[0009] As a preferred embodiment of the present invention, the circular cutting workbench includes a rotating mechanism 1, a clamping mechanism is movably installed inside the rotating mechanism 1, and a cutting mechanism 1 is movably connected to the right side of the back side of the rotating mechanism 1.

[0010] As a preferred embodiment of the present invention, the slitting workbench includes a lateral motion mechanism, the top of the lateral motion mechanism is movably connected to a second rotating mechanism, the top of the second rotating mechanism is movably mounted with a clamping mechanism, and the top of the clamping mechanism is movably mounted with a clamping mechanism.

[0011] As a preferred embodiment of the present invention, the inner tube cutting arm includes an upper and lower feeding mechanism three, a cutting mechanism is fixedly installed at the bottom of the upper and lower feeding mechanism three, the front and rear ends of the bottom of the upper and lower feeding mechanism three are fixedly connected with a cross beam two, and the bottom of the cross beam two is fixedly connected to the top of the main frame.

[0012] As a preferred embodiment of the present invention, the grabbing unit includes a lifting platform, the surface of the lifting platform is movably connected with a rotatable hook claw, the bottom of the lifting platform is movably installed with an inner support claw, the top of the lifting platform is fixedly connected to the bottom of the cylinder grabbing arm, the front and back sides of the cylinder grabbing arm are movably installed with a beam three, and the bottom of the beam three is fixedly connected to the top of the main frame.

[0013] As a preferred embodiment of the present invention, the block cutting arm includes a lifting mechanism, a transverse feeding mechanism is fixedly installed at the bottom of the lifting mechanism, a rotating mechanism three is movably installed at the bottom of the transverse feeding mechanism, and a cutting mechanism two is movably installed at the front end on the right side of the rotating mechanism three.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can achieve precise control by arranging the shell grabbing arm, the block grabbing arm, the ring cutting workbench, the slitting workbench, the inner tube cutting arm, the grabbing unit and the block cutting arm, thereby reducing a large amount of radioactive aerosols when they are generated, avoiding problems such as obstructed vision, and can achieve precise control during remote operation, thereby achieving cold cutting, reducing radioactive contamination, and improving cutting efficiency and safety.

[0015] 2. The present invention can complete the cutting of the water pipe at the lower part of the inner shell by setting up a pipe cutting workbench. The workbench is installed on the main frame and consists of a longitudinal feeding mechanism and a cutting blade. The grabbing unit grabs part of the inner shell cylinder and the water pipe to the upper part of the FA-IV box. The longitudinal feeding mechanism drives the cutting blade to cut the nearest water outlet pipe. The rotating mechanism at the bottom of the grabbing unit drives the inner shell to rotate to complete the cutting of the remaining water pipes. The cut water pipes fall directly into the FA-IV box.

[0016] 3. The present invention can grab the cut inner shell block and transport it to the FA-IV steel box by setting a shell grabbing arm. The shell grabbing arm is installed on the crossbeam 1, and can make horizontal, vertical and up and down feeding movements driven by the crossbeam 1. The lower end of the grabbing arm is installed with a clamping claw replacement mechanism. Through its rotation, the pipe clamp and the thin-wall clamp can be placed at various angles to complete the grabbing of the cut inner water pipe and the inner shell cylinder wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present invention; Figure 2 For the present invention Figure 1 The three-dimensional structure diagram of the grabbing unit; Figure 3 For the present invention Figure 1 The three-dimensional structure diagram of the middle ring cutting workbench; Figure 4 For the present invention Figure 1 The left-side stereoscopic structure diagram of the center slitting workbench; Figure 5 For the present invention Figure 1 The left-side stereoscopic structural diagram of the middle lifting mechanism; Figure 6 For the present invention Figure 1 A left-side perspective structural diagram of the inner tube cutting arm; Figure 7 For the present invention Figure 1 A right-side perspective structural diagram of the grabbing arm of the middle shell; Figure 8 For the present invention Figure 1 Rear view of the three-dimensional structure of the middle block grabbing arm; Fig. 9 For the present invention Figure 1 The three-dimensional structure diagram of the pipe cutting workbench; Fig.10 For the present invention Figure 1 Process flow chart of .

[0018] In the figure: 1, pipe cutting workbench; 101, main frame; 102, workbench; 103, FA-IV steel box; 2, cylinder grabbing arm; 3, shell grabbing arm; 31, upper and lower feeding mechanism 1; 32, clamping jaw replacement mechanism; 33, thin-walled clamp; 34, pipe clamp; 4, block grabbing arm; 41, upper and lower feeding mechanism 2; 42, hydraulic clamping mechanism; 43, flow distribution chamber; 5, ring cutting workbench; 51, rotating mechanism 1; 52, clamping mechanism; 53, cutting mechanism 1; 6. Slitting table; 61. Horizontal movement mechanism; 62. Rotating mechanism 2; 63. Clamping mechanism; 64. Pressing mechanism; 7. Inner tube cutting arm; 71. Up and down feeding mechanism 3; 72. Cutting mechanism; 8. Grabbing unit; 81. Lifting platform; 82. Rotatable hook; 83. Inner support claw; 9. Block cutting arm; 91. Lifting mechanism; 92. Horizontal feeding mechanism; 93. Rotating mechanism 3; 94. Cutting mechanism 2; 10. Beam 1; 11. Beam 2; 12. Beam 3. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figures 1 to 10 As shown, the present invention provides an inner shell cutting device for reactor body decommissioning, comprising: Pipe cutting workbench 1; The barrel grabbing arm 2 is arranged on the top of the pipe cutting workbench 1; The shell grabbing arm 3 is arranged at the front end of the top of the pipe cutting workbench 1; The block grabbing arm 4 is arranged on the right side of the shell grabbing arm 3; The ring cutting workbench 5 is arranged at the bottom of the pipe cutting workbench 1; A slitting workbench 6, which is arranged inside the pipe cutting workbench 1; The inner tube cutting arm 7 is arranged on the back of the cylinder grabbing arm 2; A grabbing unit 8, which is arranged at the bottom of the cylinder grabbing arm 2; The block cutting arm 9 is arranged on the back side of the pipe cutting workbench 1.

[0021] refer to Fig. 9 The pipe cutting workbench 1 includes a main frame 101, a workbench 102 is fixedly connected to the left side of the back side of the inner wall of the main frame 101, and a FA-IV steel box 103 is movably connected to the right side of the workbench 102.

[0022] As a technical optimization solution of the present invention, by setting up a pipe cutting workbench 1, the cutting of the water pipe at the lower part of the inner shell can be completed. The workbench 102 is installed on the main frame 101, and is composed of a longitudinal feeding mechanism and a cutting blade. The grabbing unit 8 grabs part of the inner shell cylinder and the water pipe to the upper part of the FA-IV box, and the longitudinal feeding mechanism drives the cutting blade to cut the nearest water outlet pipe. The rotating mechanism at the bottom of the grabbing unit 8 drives the inner shell to rotate to complete the cutting of the remaining water pipes, and the cut water pipes fall directly into the FA-IV box.

[0023] refer to Figure 7 The shell grabbing arm 3 includes an upper and lower feeding mechanism 31, the bottom of the upper and lower feeding mechanism 31 is movably connected with a clamp changing mechanism 32, the bottom of the clamp changing mechanism 32 is movably installed with a thin-walled clamp 33, the front of the clamp changing mechanism 32 is movably installed with a pipe clamp 34, the bottom of the upper and lower feeding mechanism 31 is movably installed with a beam 10, and the bottom of the beam 10 is fixedly connected to the front end of the top of the main frame 101.

[0024] As a technical optimization scheme of the present invention, by setting up a shell grabbing arm 3, the cut inner shell block can be grabbed and transported to the FA-IV steel box 103. The shell grabbing arm 3 is installed on the crossbeam 10, and can make horizontal, vertical and up and down feeding movements under the drive of the crossbeam 10. The lower end of the grabbing arm is installed with a clamping claw replacement mechanism 32. Through its rotation, the pipe clamp 34 and the thin-wall clamp 33 can be placed at various angles to complete the grabbing of the cut inner shell internal water pipe and the inner shell tube wall.

[0025] refer to Figure 8 The block grabbing arm 4 includes an upper and lower feeding mechanism 41, the bottom of which is fixedly connected to the right side of the top of the beam 10, and a hydraulic clamping mechanism 42 is movably installed at the bottom of the upper and lower feeding mechanism 41, and a flow distribution chamber 43 is movably connected to the bottom of the hydraulic clamping mechanism 42, and the flow distribution chamber 43 is a quarter flow distribution chamber.

[0026] As a technical optimization solution of the present invention, by setting up a block grabbing arm 4, the flow distribution chamber block that has been cut off can be grabbed and transported. A hydraulic clamping mechanism 42 is installed at the lower end of the block grabbing arm 4 to clamp the upper and lower surfaces of the flow distribution chamber 43 and transport it to the FA-IV steel box 103 through the azimuth motion mechanism.

[0027] refer to Figure 3 The circular cutting workbench 5 includes a rotating mechanism 51, a clamping mechanism 52 is movably installed inside the rotating mechanism 51, and a cutting mechanism 53 is movably connected to the right side of the back side of the rotating mechanism 51.

[0028] As a technical optimization solution of the present invention, by setting up a circular cutting workbench 5, the upper and lower cylinders of the inner shell can be cross-cut. Three clamping mechanisms are arranged on the circular cutting workbench 5. The clamping claws of the clamping mechanism clamp the outer wall of the inner shell under the push of the hydraulic cylinder.

[0029] refer to Figure 4 The slitting workbench 6 includes a lateral motion mechanism 61, the top of the lateral motion mechanism 61 is movably connected to a second rotating mechanism 62, the top of the second rotating mechanism 62 is movably installed with a clamping mechanism 63, and the top of the clamping mechanism 63 is movably installed with a pressing mechanism 64.

[0030] As a technical optimization scheme of the present invention, by setting up a slitting workbench 6, the inner shell cylinder and the flow distribution chamber 43 can be transported and clamped. The slitting workbench 6 is composed of a lateral movement mechanism 61, a rotating mechanism 62, a clamping mechanism 63 and a pressing mechanism 64. The lateral movement mechanism 61 drives the workbench 102 to move horizontally above the buried well. The grabbing unit 8 clamps the cut 600mm high cylinder to the clamping mechanism 63 of the slitting workbench 6. The clamping mechanism 63 retracts and retracts eight groups of clamping blocks to clamp the cylinder. The pressing mechanism 64 rotates and presses down to press the cylinder onto the slitting workbench 6. The rotating mechanism 62 drives the cylinder to rotate, and cooperates with the tool on the block cutting arm 9 to cut the cylinder into eight pieces.

[0031] refer to Figure 6 The inner tube cutting arm 7 includes an upper and lower feeding mechanism three 71, and a cutting mechanism 72 is fixedly installed at the bottom of the upper and lower feeding mechanism three 71. The front and rear ends of the bottom of the upper and lower feeding mechanism three 71 are fixedly connected to the cross beam two 11, and the bottom of the cross beam two 11 is fixedly connected to the top of the main frame 101.

[0032] As a technical optimization solution of the present invention, by setting up an inner tube cutting arm 7, the water pipe extending from the inner shell can be cut. The inner tube cutting arm 7 is installed on the second crossbeam 11, and driven by the second crossbeam 11, it completes horizontal, vertical and lifting feeding movements. The cutting mechanism 72 is installed at the lower end of the cutting arm, and the circular saw cutter completes the cutting of the inner water outlet pipe under the drive of the motor.

[0033] refer to Figure 2The grabbing unit 8 includes a lifting platform 81, the surface of the lifting platform 81 is movably connected with a rotatable hook claw 82, the bottom of the lifting platform 81 is movably installed with an inner support claw 83, the top of the lifting platform 81 is fixedly connected to the bottom of the cylinder grabbing arm 2, the front and back of the cylinder grabbing arm 2 are movably installed with a beam three 12, and the bottom of the beam three 12 is fixedly connected to the top of the main frame 101.

[0034] As a technical optimization scheme of the present invention, by setting up a grabbing unit 8, it can serve as the main part of the lifting mechanism to complete the grabbing and lifting of the inner shell. The grabbing and releasing of the inner shell can be completed by extending and retracting the inner support claws 83 of the grabbing unit 8. The grabbing unit 8 is then provided with a reversible hook claw and a lifting platform to ensure that the cut inner shell cylinder can be firmly hooked and will not fall off.

[0035] refer to Figure 5 The block cutting arm 9 includes a lifting mechanism 91, a transverse feeding mechanism 92 is fixedly installed at the bottom of the lifting mechanism 91, a rotating mechanism 3 93 is movably installed at the bottom of the transverse feeding mechanism 92, and a cutting mechanism 2 94 is movably installed at the front end on the right side of the rotating mechanism 3 93.

[0036] As a technical optimization scheme of the present invention, by setting a block cutting arm 9, the inner shell cylinder and the flow distribution chamber 43 can be longitudinally cut, and the sampling piece can be cut. The block cutting arm 9 is composed of a lifting mechanism 91, a transverse feeding mechanism 92, a rotating mechanism three 93 and a cutting mechanism two 94. The lifting mechanism 91 drives the tool to feed up and down, the transverse feeding mechanism 92 drives the tool to do a cutting depth feeding movement, and the rotating mechanism three 93 drives the tool to rotate 90° to achieve transverse and longitudinal cutting. The block cutting arm 9 is installed on the beam four and can move horizontally as a whole, cooperate with the rotation of the cutting workbench 6 to complete the cutting of the inner shell cylinder and the flow distribution chamber 43.

[0037] The working principle and use process of the present invention are as follows: when in use, the inner shell is lifted from the buried well to a specified height by using the cylinder grabbing arm 2 and the grabbing unit 8, and then the outer wall of the inner shell is clamped by using the clamping mechanism on the circular cutting workbench 5. After completion, the inner shell is cut by rotating the circular cutting tool, and the cutting height is 600 mm each time. Then, the grabbing unit 8 is used to send the cut inner shell cylinder to the slitting workbench 6, and the clamping mechanism 63 on the slitting workbench 6 clamps and fixes the inner shell cylinder. Then, the lateral and up and down feeding of the block cutting arm 9 is used to complete the longitudinal cutting of the inner shell cylinder wall, and the slitting workbench 6 is rotated to repeat the previous actions until the inner shell is cut into eight equal parts. After completion, the shell grabbing arm 3 is used to transport the cut inner shell blocks to the FA-IV steel box 10 3, repeat the above operation until the outer wall of the inner shell is at the same height as the highest water pipe inside. After completion, use the inner tube cutting arm 7 to cut the water outlet pipe extending from the inner shell one by one, and then use the shell grabbing arm 3 to transport the cut water pipe to the FA-IV steel box 103, and then use the grabbing unit 8 to grab the remaining inner shell to the top of the FA-IV steel box 103, and the tool on the workbench 102 cuts off the water pipes at the bottom of the inner shell one by one and drops them into the FA-IV box. After completion, use the grabbing unit 8 to grab the remaining flow distribution chamber 43 to the cutting platform, and cut it into four equal parts by the block cutting arm 9, and then use the block grabbing arm 4 to transport the cut flow distribution chamber 43 blocks to the FA-IV steel box 103.

[0038] In summary: the inner shell cutting device used for reactor body decommissioning can achieve precise control by setting the shell grabbing arm 3, the block grabbing arm 4, the ring cutting workbench 5, the cutting workbench 6, the inner tube cutting arm 7, the grabbing unit 8 and the block cutting arm 9, thereby reducing a large amount of radioactive aerosols when they are generated, avoiding problems such as obstructed vision, and can achieve precise control during remote operation, thereby achieving cold cutting, reducing radioactive contamination, and improving cutting efficiency and safety.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inner shell cutting device for reactor decommissioning, characterized in that: include: Pipe cutting workbench (1); A barrel grabbing arm (2), wherein the barrel grabbing arm (2) is arranged on the top of the pipe cutting workbench (1); A shell grabbing arm (3), wherein the shell grabbing arm (3) is arranged at the front end of the top of the pipe cutting workbench (1); A block grabbing arm (4), wherein the block grabbing arm (4) is arranged on the right side of the shell grabbing arm (3); A ring cutting workbench (5), wherein the ring cutting workbench (5) is arranged at the bottom of the pipe cutting workbench (1); A slitting workbench (6), wherein the slitting workbench (6) is arranged inside the tube cutting workbench (1); An inner tube cutting arm (7), wherein the inner tube cutting arm (7) is arranged on the back side of the cylinder grabbing arm (2); A grabbing unit (8), wherein the grabbing unit (8) is arranged at the bottom of the cylinder grabbing arm (2); A block cutting arm (9) is arranged on the back side of the pipe cutting workbench (1).

2. The inner shell cutting device for reactor decommissioning according to claim 1, characterized in that: The pipe cutting workbench (1) comprises a main frame (101), the front end of the left side of the inner wall of the main frame (101) is fixedly connected to the pipe cutting workbench (102), and the right side of the pipe cutting workbench (102) is movably connected to the FA-IV steel box (103).

3. The inner shell cutting device for reactor decommissioning according to claim 2, characterized in that: The shell grabbing arm (3) comprises an upper and lower feeding mechanism (31), the bottom of the upper and lower feeding mechanism (31) is movably connected to a clamp changing mechanism (32), the bottom of the clamp changing mechanism (32) is movably mounted with a thin-wall clamp (33), the front of the clamp changing mechanism (32) is movably mounted with a pipe clamp (34), the bottom of the upper and lower feeding mechanism (31) is movably mounted with a cross beam (10), and the bottom of the cross beam (10) is fixedly connected to the front end of the top of the main frame (101).

4. The inner shell cutting device for reactor decommissioning according to claim 3, characterized in that: The block grabbing arm (4) comprises an upper and lower feeding mechanism 2 (41), the bottom of which is fixedly connected to the right side of the top of the crossbeam 1 (10), the bottom of which is movably mounted with a hydraulic clamping mechanism (42), the bottom of which is movably connected with a flow distribution chamber (43), and the flow distribution chamber (43) is a quarter flow distribution chamber.

5. The inner shell cutting device for reactor decommissioning according to claim 4, characterized in that: The circular cutting workbench (5) comprises a rotating mechanism (51), a clamping mechanism (52) is movably installed inside the rotating mechanism (51), and a cutting mechanism (53) is movably connected to the right side of the back of the rotating mechanism (51).

6. The inner shell cutting device for reactor decommissioning according to claim 5, characterized in that: The slitting workbench (6) comprises a lateral motion mechanism (61), the top of the lateral motion mechanism (61) is movably connected to a second rotating mechanism (62), the top of the second rotating mechanism (62) is movably mounted with a clamping mechanism (63), and the top of the clamping mechanism (63) is movably mounted with a pressing mechanism (64).

7. The inner shell cutting device for reactor decommissioning according to claim 6, characterized in that: The inner tube cutting arm (7) comprises an upper and lower feeding mechanism three (71), a cutting mechanism (72) being fixedly mounted at the bottom of the upper and lower feeding mechanism three (71), a cross beam two (11) being fixedly connected at the front and rear ends of the bottom of the upper and lower feeding mechanism three (71), and a bottom of the cross beam two (11) being fixedly connected to the top of the main frame (101).

8. The inner shell cutting device for reactor decommissioning according to claim 7, characterized in that: The grabbing unit (8) comprises a lifting platform (81), the surface of the lifting platform (81) is movably connected with a rotatable hook claw (82), the bottom of the lifting platform (81) is movably mounted with an inner support claw (83), the top of the lifting platform (81) is fixedly connected to the bottom of the cylinder grabbing arm (2), the front and back sides of the cylinder grabbing arm (2) are movably mounted with a cross beam three (12), and the bottom of the cross beam three (12) is fixedly connected to the top of the main frame (101).

9. The inner shell cutting device for reactor decommissioning according to claim 8, characterized in that: The block cutting arm (9) comprises a lifting mechanism (91), a transverse feeding mechanism (92) is fixedly mounted on the bottom of the lifting mechanism (91), a rotating mechanism three (93) is movably mounted on the bottom of the transverse feeding mechanism (92), and a cutting mechanism two (94) is movably mounted on the front end of the right side of the rotating mechanism three (93).

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