Nuclear power new fuel assembly overhauling gripping apparatus and gripping method thereof

Abstract

The invention relates to the technical field of fuel overhauling, and discloses a nuclear power new fuel assembly overhauling gripping apparatus and a gripping method thereof.The nuclear power new fuel assembly overhauling gripping apparatus comprises a power mechanism, and the power mechanism further comprises a fixing plate. A fuel assembly needing to be detected is lifted through a lifting appliance and penetrates through an air pressure ring pipe, the fuel assembly is placed at the top of a rotating ring, at the moment, the high-quality fuel assembly presses a pressed plate to move downwards, and air in a pressed air groove enters an air storage box through a conveying air pipe under extrusion of the pressed plate; and gas in the gas storage tank enters the inner wall of the sliding pipe to force the pushing disc to move outwards, in the outward moving process of the pushing disc, the inclined rolling wheel is pushed by the pushing disc to make contact with the outer wall of the fuel assembly, and when the output rod and the inclined rolling wheel extend outwards, the output rod and the inclined rolling wheel are attached to the square shape of the fuel assembly.

Description

Technical Field

[0001] The invention relates to the technical field of fuel maintenance equipment, in particular to a nuclear power new fuel assembly maintenance gripper and a gripping method thereof. Background Art

[0002] After the new fuel assemblies are transported to the fuel plant, special equipment is required to transport the new fuel assemblies from the container receiving room to the new fuel inspection device, the new fuel storage rack, or from the new fuel storage rack to the new fuel elevator. During these operations, the fuel assemblies can only be hoisted vertically due to their slender structure, heavy weight, and high overall straightness requirements.

[0003] However, due to the fact that new fuel assemblies can only be hoisted vertically and there are a large number of tiny gaps in the assemblies, workers need to adjust the up and down height and rotation angle when conducting all-round inspections of the assemblies. If the fixture is rotated and moved up and down at the same time while clamping and fixing, it is easy to cause damage to the surface of the material, affecting the service life of the fuel assembly. To address the above problems, the following solutions are proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a nuclear power new fuel assembly maintenance gripper, comprising a power mechanism, the power mechanism also includes a fixed plate, the bottom of the fixed plate is fixedly connected to an electric telescopic rod, and one end of the electric telescopic rod away from the fixed plate is fixedly connected to a placement plate;

[0005] The rotating mechanism includes a storage air box fixedly connected to the side wall of the fixed plate, a plurality of air pressure ring tubes are connected through the side wall of the storage air box, a rotating sealing plate is rotatably connected to the inner wall of the plurality of air pressure ring tubes, and a plurality of sliding tubes are connected through the side wall of the rotating sealing plate;

[0006] The clamping mechanism comprises a sliding frame which is slidably connected to the inner wall of the fixed plate, the top of the sliding frame is fixedly connected to the mounting plate, and the top of the mounting plate is fixedly connected to the telescopic rod.

[0007] Preferably, the power mechanism also includes a limiting bracket fixedly connected to the top of the fixed plate, a rotating column rotatably connected to the inner wall of the limiting bracket, a gear 2 fixedly connected to the side wall of the rotating column, a gear 2 fixedly connected to the end of the rotating column away from the gear 1, a pushing gear rod fixedly connected to the top of the placement plate, the outer wall of the pushing gear rod is meshed with the outer wall of the gear 1, and a mounting frame is fixedly connected to the side wall of the fixed plate.

[0008] Preferably, the power mechanism also includes a pressurized air groove opened on the outer wall of the placement plate, a return spring is fixedly connected to the inner wall of the pressurized air groove, a pressure plate is slidably connected to the inner wall of the pressurized air groove, a transmission air pipe is connected through the inner wall of the through hole on the placement plate, the end of the transmission air pipe away from the placement plate is connected through the side wall of the storage air tank, the top of the pressure plate is rotatably connected to a rotating ring, and a fuel assembly is placed on the top of the rotating ring.

[0009] Preferably, the rotating mechanism also includes a pushing plate slidably connected to the inner walls of several sliding tubes, an output rod is fixedly connected to the side wall of the pushing plate, and an inclined roller is fixedly connected to the end of the output rod away from the pushing plate. Utilizing the high quality characteristics of the fuel assembly itself, a pressurized air groove is provided inside the equipment. When the staff needs to inspect, the fuel assembly to be inspected is lifted by the sling, and the fuel assembly is placed on the top of the rotating ring through the air pressure ring tube. At this time, the high-quality fuel assembly presses the pressure plate to move downward, and the air inside the pressurized air groove enters the storage air box through the transmission air pipe under the compression of the pressure plate, and the gas inside the storage air box enters the inner wall of the sliding tube, forcing the pushing plate to move outward. In the process of the pushing plate moving outward, the inclined roller is pushed by the pushing plate and contacts the outer wall of the fuel assembly, wherein the output rod and the inclined roller will fit the square shape of the fuel assembly when extended, thereby reducing the wear of the fuel assembly by the equipment during subsequent rotation.

[0010] Preferably, the rotating mechanism also includes a rotating ring rotatably connected to the top of the air pressure ring tube, a ring gear is fixedly connected to the outer wall of the rotating ring, and a plurality of limiting vertical rods are fixedly connected to the bottom of the rotating ring, the outer wall of the limiting vertical rod is slidably connected to the outer wall of the sliding tube, and the outer wall of the ring gear is rotatably connected to the outer wall of gear 2. By utilizing the fact that the cross-section of the fuel assembly is mostly square, when the fuel assembly needs to be inspected, the electric telescopic rod will generate a contraction force to force the placement plate and the fuel assembly to move upward, wherein the toothed rod is also pushed to move upward synchronously during the placement plate moving up, and pushing the toothed rod upward drives gear 1 to rotate, and gear 1 drives gear 2 to rotate synchronously through the rotating column, and gear 2 drives the ring gear to rotate. During this process, the ring gear drives the limiting vertical rod to rotate through the rotating ring, and the limiting vertical rod drives the sliding tube of the side wall to rotate, forcing the fuel assembly clamped in the air pressure ring tube to rotate synchronously, and the friction between the rotating sealing plate and the air pressure ring tube replaces the friction between the fuel assembly and the clamping assembly, thereby minimizing the wear of the fuel assembly by the equipment during the detection process.

[0011] Preferably, the clamping mechanism also includes a pushing plate fixedly connected to the end of the telescopic rod away from the mounting plate, the top of the pushing gear rod is fixedly connected with an inclined pushing block, the top of the pushing plate is slidably connected with a control gear rod, and the inner wall of the control gear rod is fixedly connected with an outward push spring. Utilizing the continuous extension and retraction force of the electric telescopic rod, a sliding frame and a mounting plate are provided inside the device. When the device is about to complete the detection, the placement plate also retracts upward to the highest point. At this time, the top of the placement plate contacts the bottom of the sliding frame. As the electric telescopic rod continues to retract, the crushed mounting plate is moved upward, and the mounting plate is separated from the bottom limiting bracket. The telescopic rod is powered on and generates an upward thrust, which forces the control gear rod to move upward.

[0012] Preferably, the clamping mechanism also includes a roller rotatably connected to the inner wall of the control gear rod, the top of the push plate is rotatably connected to a clamping frame, the inner wall of the clamping frame is fixedly connected to a rolling column, the rotating position of the clamping frame is fixedly connected to a clamping gear, and the outer wall of the clamping gear is meshingly connected to the outer wall of the control gear rod. In order to prevent the long strip of fuel assembly from tilting due to the fuel assembly being too long and the top being free of restraint in the later stage of detection when the fuel assembly is rising, an inclined push block is provided inside the equipment by utilizing the force of pushing the gear rod up and down. After the equipment starts to be overhauled, the pushing gear rod will move up a distance and force the output rod at the top to contact the roller. The roller is restricted by the inclined surface of the inclined push block and drives the control gear rod to move backward. At this time, the control gear rod drives the clamping gear to rotate through the tooth block on the side, and the clamping gear drives the clamping frame and the rolling column to clamp the ring on the top of the fuel assembly. Through the application of the above-mentioned components, a limiting clamping force is provided for the top of the fuel assembly to prevent the fuel assembly from tilting and causing excessive contact force with the inclined roller position, resulting in depression or damage on the side of the fuel assembly.

[0013] A nuclear power new fuel assembly maintenance gripper and a gripping method thereof, comprising the following steps:

[0014] S1: When the staff needs to inspect the fuel assembly, the fuel assembly to be inspected is lifted by the sling, and passed through the air pressure ring tube to place the fuel assembly on the top of the rotating ring;

[0015] S2: The high-quality fuel assembly presses the pressure plate downward, and the air inside the pressure gas tank enters the storage gas box through the transmission gas pipe under the pressure of the pressure plate;

[0016] S3: The gas inside the storage gas box enters the inner wall of the sliding tube, forcing the push plate to move outward. During the outward movement of the push plate, the inclined roller is pushed by the push plate to contact the outer wall of the fuel assembly.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention utilizes the high quality of the fuel assembly itself and sets a pressurized gas groove inside the equipment. When the staff needs to inspect, the fuel assembly to be inspected is lifted by the sling, and passed through the air pressure ring tube, and the fuel assembly is placed on the top of the rotating ring. At this time, the high-quality fuel assembly presses the pressure plate to move downward, and the air inside the pressurized gas groove enters the storage gas box through the transmission air pipe under the compression of the pressure plate, and the gas inside the storage gas box enters the inner wall of the sliding tube, forcing the push plate to move outward. During the outward movement of the push plate, the inclined roller is pushed by the push plate to contact the outer wall of the fuel assembly, and the output rod and the inclined roller will fit the square shape of the fuel assembly when extended, thereby reducing the wear of the fuel assembly by the equipment during the subsequent rotation.

[0019] (2) The present invention utilizes the fact that the cross-section of the fuel assembly is mostly square. When the fuel assembly needs to be inspected, the electric telescopic rod will generate a contraction force, forcing the placement plate and the fuel assembly to move upward. In the process of the placement plate moving upward, the gear rod is also pushed upward synchronously. The gear rod is pushed upward to drive gear 1 to rotate, and gear 1 drives gear 2 to rotate synchronously through the rotating column. Gear 2 drives the annular gear to rotate. During this process, the annular gear drives the limiting vertical rod to rotate through the rotating ring. The limiting vertical rod drives the sliding tube of the side wall to rotate, forcing the fuel assembly clamped in the air pressure ring tube to rotate synchronously. The friction between the rotating sealing plate and the air pressure ring tube replaces the friction between the fuel assembly and the clamping assembly, thereby minimizing the wear of the equipment on the fuel assembly during the inspection process.

[0020] (3) In order to prevent the long strip fuel assembly from tilting in the later stage of inspection due to the lack of restraint on the top when the fuel assembly is too long, the present invention uses the force to push the gear rod up and down, and provides an inclined push block inside the equipment. After the equipment starts to be inspected, the gear rod is pushed to move up a certain distance, and the output rod on the top is forced to contact the roller. The roller is restricted by the inclined surface of the inclined push block, and drives the control gear rod to move backward. At this time, the control gear rod drives the clamping gear to rotate through the gear block on the side. The clamping gear drives the clamping frame and the rolling column to clamp the circular ring on the top of the fuel assembly. Through the application of the above-mentioned components, a limiting clamping force is provided for the top of the fuel assembly to prevent the fuel assembly from tilting and causing excessive contact force with the inclined roller position, which causes dents or damage to the side of the fuel assembly.

[0021] (4) The present invention utilizes the continuous extension and retraction force of the electric telescopic rod. A sliding frame and a mounting plate are arranged inside the device. When the device is about to complete the detection, the placement plate also retracts upward to the highest point. At this time, the top of the placement plate contacts the bottom of the sliding frame. As the electric telescopic rod continues to retract, the crushed mounting plate is moved upward, and the mounting plate is separated from the bottom limiting bracket. The telescopic rod is powered on and generates an upward thrust, which forces the control gear rod to move upward. When the control gear rod moves upward, the inclined push block loses the restriction on the roller. Under the push of the external push spring, the control gear rod is reset, and the outer wall tooth block of the control gear rod drives the clamping frame to open to both sides, so that the clamping frame is away from the outer wall of the fuel assembly, thereby avoiding the friction of the clamping frame on the outer wall of the fuel assembly during subsequent external hoisting, thereby affecting the integrity of the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is an exploded schematic diagram of the overall structural assembly of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 3 It is an exploded schematic diagram of the power mechanism assembly of the present invention;

[0026] Figure 4 It is a cross-sectional schematic diagram of the rotating mechanism of the present invention;

[0027] Figure 5 For the present invention Figure 4 A magnified view of middle;

[0028] Figure 6 It is a cross-sectional schematic diagram of the clamping mechanism of the present invention;

[0029] Figure 7 For the present invention Figure 6 Enlarged view of middle B;

[0030] Figure 8 It is a schematic diagram of the working process of the present invention.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] In the figure: 1. power mechanism; 101. fixing plate; 102. electric telescopic rod; 103. placing plate; 104. limiting bracket; 105. rotating column; 106. gear 1; 107. gear 2; 108. pushing gear rod; 109. mounting frame; 110. pressurized gas groove; 111. return spring; 112. pressurized plate; 113. transmission gas pipe; 114. fuel assembly; 115. rotating ring; 2. rotating mechanism; 201. storage gas box; 202. air pressure ring pipe; 2 03. Sliding tube; 204. Pushing plate; 205. Output rod; 206. Inclined roller; 207. Rotating ring; 208. Limiting vertical rod; 209. Ring gear; 210. Rotating sealing plate; 3. Clamping mechanism; 301. Sliding frame; 302. Mounting plate; 303. Telescopic rod; 304. Pushing plate; 305. Inclined push block; 306. Control gear rod; 307. Outward push spring; 308. Roller; 309. Clamping frame; 310. Rolling column; 311. Clamping gear. DETAILED DESCRIPTION

[0033] 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.

[0034] For example, see Figure 1 - Figure 3 The present invention is a nuclear power new fuel assembly maintenance gripper, comprising a power mechanism 1, the power mechanism 1 also comprises a fixed plate 101, the bottom of the fixed plate 101 is fixedly connected with an electric telescopic rod 102, and one end of the electric telescopic rod 102 away from the fixed plate 101 is fixedly connected with a placement plate 103;

[0035] The rotating mechanism 2 includes a storage air box 201 fixedly connected to the side wall of the fixed plate 101, a plurality of air pressure ring tubes 202 are connected through the side wall of the storage air box 201, a rotating sealing plate 210 is rotatably connected to the inner wall of the plurality of air pressure ring tubes 202, and a plurality of sliding tubes 203 are connected through the side wall of the rotating sealing plate 210;

[0036] The clamping mechanism 3 comprises a sliding frame 301 slidably connected to the inner wall of the fixed plate 101 , a mounting plate 302 is fixedly connected to the top of the sliding frame 301 , and a telescopic rod 303 is fixedly connected to the top of the mounting plate 302 .

[0037] The power mechanism 1 also includes a limiting bracket 104 fixedly connected to the top of the fixed plate 101, a rotating column 105 is rotatably connected to the inner wall of the limiting bracket 104, a gear 2 107 is fixedly connected to the side wall of the rotating column 105, and the end of the rotating column 105 away from the gear 1 106 is fixedly connected to the gear 2 107, a pushing gear rod 108 is fixedly connected to the top of the placement plate 103, the outer wall of the pushing gear rod 108 is meshed with the outer wall of the gear 1 106, and a mounting frame 109 is fixedly connected to the side wall of the fixed plate 101.

[0038] The power mechanism 1 also includes a pressurized gas groove 110 opened on the outer wall of the placement plate 103, a return spring 111 is fixedly connected to the inner wall of the pressurized gas groove 110, a pressure plate 112 is slidably connected to the inner wall of the pressurized gas groove 110, a transmission gas pipe 113 is connected through the inner wall of the through hole on the placement plate 103, and the end of the transmission gas pipe 113 away from the placement plate 103 is connected through the side wall of the storage gas tank 201, and the top of the pressure plate 112 is rotatably connected to a rotating ring 115, and a fuel assembly 114 is placed on the top of the rotating ring 115.

[0039] For example 2, please refer to Figure 4 - Figure 8 The present invention is a new nuclear power fuel assembly maintenance gripper. On the basis of Example 1, the rotating mechanism 2 also includes a push plate 204 slidably connected to the inner wall of a plurality of sliding tubes 203. An output rod 205 is fixedly connected to the side wall of the push plate 204. An end of the output rod 205 away from the push plate 204 is fixedly connected to an inclined roller 206. By utilizing the high quality characteristics of the fuel assembly 114 itself, a pressurized gas tank 110 is provided inside the equipment. When the staff needs to inspect, the fuel assembly 114 to be inspected is lifted by the sling, and passed through the air pressure ring tube 202, and the fuel assembly 114 is placed on the top of the rotating ring 115. At this time, the high-quality fuel assembly 114 compresses the pressure plate 112 to move downward, and the air inside the pressure gas groove 110 enters the storage gas box 201 through the transmission gas pipe 113 under the compression of the pressure plate 112, and the internal gas of the storage gas box 201 enters the inner wall of the sliding tube 203, forcing the push plate 204 to move outward. In the process of the push plate 204 moving outward, the inclined roller 206 is pushed by the push plate 204 to contact the outer wall of the fuel assembly 114, and the output rod 205 and the inclined roller 206 will fit the square shape of the fuel assembly 114 when extended, thereby reducing the wear of the fuel assembly 114 by the equipment during the subsequent rotation process.

[0040] The rotating mechanism 2 also includes a rotating ring 207 rotatably connected to the top of the air pressure ring tube 202, a ring gear 209 is fixedly connected to the outer wall of the rotating ring 207, and a plurality of limiting vertical rods 208 are fixedly connected to the bottom of the rotating ring 207. The outer wall of the limiting vertical rod 208 is slidably connected to the outer wall of the sliding tube 203, and the outer wall of the ring gear 209 is rotatably connected to the outer wall of the gear 2 107. By utilizing the fact that the cross-section of the fuel assembly 114 is mostly square, when the fuel assembly 114 needs to be repaired, the electric telescopic rod 102 will generate a contraction force to force the placement plate 103 and the fuel assembly 114 to move upward, wherein the placement plate 103 pushes the gear rod 108 to move upward during the upward movement. It moves upward synchronously, pushing the gear rod 108 upward to push gear 106 to rotate, and gear 106 drives gear 2 107 to rotate synchronously through the rotating column 105, and gear 2 107 drives the annular gear 209 to rotate. During this process, the annular gear 209 drives the limiting vertical rod 208 to rotate through the rotating ring 207, and the limiting vertical rod 208 drives the sliding tube 203 of the side wall to rotate, forcing the fuel assembly 114 clamped in the air pressure ring tube 202 to rotate synchronously as well. The friction between the rotating sealing plate 210 and the air pressure ring tube 202 replaces the friction between the fuel assembly 114 and the clamping assembly, thereby minimizing the wear of the fuel assembly 114 by the equipment during the detection process.

[0041] The clamping mechanism 3 also includes a pushing plate 304 fixedly connected to the end of the telescopic rod 303 away from the mounting plate 302, the top of the pushing gear rod 108 is fixedly connected to an inclined pushing block 305, the top of the pushing plate 304 is slidably connected to a control gear rod 306, and the inner wall of the control gear rod 306 is fixedly connected to an outward push spring 307. Utilizing the continuous extension and contraction force of the electric telescopic rod 102, a sliding frame 301 and a mounting plate 302 are arranged inside the device. When the device is about to complete the detection, the placement plate 103 also retracts upward to the highest point. At this time, the top of the placement plate 103 contacts the bottom of the sliding frame 301. As the electric telescopic rod 102 continues to retract, the crushed mounting plate 302 is moved upward, and the mounting plate 302 is separated from the bottom limiting bracket 104. The telescopic rod 303 is powered on and generates an upward thrust, which forces the control gear rod 306 to move upward.

[0042] The clamping mechanism 3 also includes a roller 308 rotatably connected to the inner wall of the control gear rod 306, the top of the push plate 304 is rotatably connected to a clamping frame 309, the inner wall of the clamping frame 309 is fixedly connected to a rolling column 310, the rotation position of the clamping frame 309 is fixedly connected to a clamping gear 311, and the outer wall of the clamping gear 311 is meshed with the outer wall of the control gear rod 306. In order to prevent the long strip of fuel assembly 114 from tilting due to the lack of restraint on the top in the later stage of detection when the fuel assembly 114 is too long when rising, an inclined push block 305 is provided inside the device by utilizing the force of pushing the gear rod 108 up and down, and the device starts to detect After repair, the push gear rod 108 will move up a distance and force the top output rod 205 to contact the roller 308. The roller 308 is restricted by the inclined surface of the inclined push block 305, driving the control gear rod 306 to move backward. At this time, the control gear rod 306 drives the clamping gear 311 to rotate through the side gear block. The clamping gear 311 drives the clamping frame 309 and the rolling column 310 to clamp the ring on the top of the fuel assembly 114. Through the application of the above-mentioned components, a limiting clamping force is provided for the top of the fuel assembly 114 to prevent the fuel assembly 114 from tilting and causing excessive contact force with the tilted roller 206 position, causing the side of the fuel assembly 114 to be dented or damaged.

[0043] The manufacturing method of the manufacturing device comprises the following steps:

[0044] S1: When the staff needs to inspect the fuel assembly 114, the staff of the present invention lifts the fuel assembly 114 to be inspected by the sling, passes the fuel assembly 114 through the air pressure ring tube 202, and places the fuel assembly 114 on the top of the rotating ring 115;

[0045] S2: The high-quality fuel assembly 114 presses the pressure plate 112 to move downward, and the air inside the pressure gas tank 110 is squeezed by the pressure plate 112 and enters the storage gas tank 201 through the transmission gas pipe 113;

[0046] S3: The internal gas of the storage gas box 201 enters the inner wall of the sliding tube 203, forcing the push plate 204 to move outward. During the outward movement of the push plate 204, the inclined roller 206 is pushed by the push plate 204 to contact the outer wall of the fuel assembly 114.

[0047] A specific application of this embodiment is: when the staff needs to inspect, the fuel assembly 114 to be inspected is lifted by the sling, and passed through the air pressure ring tube 202, and the fuel assembly 114 is placed on the top of the rotating ring 115. At this time, the high-quality fuel assembly 114 presses the pressure plate 112 to move downward, and the air inside the pressure gas groove 110 enters the storage gas box 201 through the transmission gas pipe 113 under the pressure of the pressure plate 112, and the gas inside the storage gas box 201 enters the inner wall of the sliding tube 203, forcing the push plate 204 to move outward. In the process of the push plate 204 moving outward, the inclined roller 206 is pushed by the push plate 204 to contact the outer wall of the fuel assembly 114, and the output rod 205 and the inclined roller 206 are extended outward. , will fit the square shape of the fuel assembly 114, and take advantage of the fact that the cross section of the fuel assembly 114 is mostly square. When the fuel assembly 114 needs to be repaired, the electric telescopic rod 102 will generate a contraction force, forcing the placement plate 103 and the fuel assembly 114 to move upward, wherein the placement plate 103 pushes the gear rod 108 to move upward synchronously during the upward movement, and the gear rod 108 is pushed upward to drive the gear 106 to rotate, and the gear 106 drives the gear 2 107 to rotate synchronously through the rotating column 105, and the gear 2 107 drives the ring gear 209 to rotate. In this process, the ring gear 209 drives the limiting vertical rod 208 to rotate through the rotating ring 207, and the limiting vertical rod 208 drives the sliding tube 203 of the side wall to rotate, forcing the clamping The fuel assembly 114 inside the gas pressure ring tube 202 also rotates synchronously. The friction between the rotating sealing plate 210 and the gas pressure ring tube 202 replaces the friction between the fuel assembly 114 and the clamping assembly. After the equipment starts to be overhauled, the pushing gear rod 108 will move up a distance and force the top output rod 205 to contact the roller 308. The roller 308 is restricted by the inclined surface of the inclined surface push block 305, and drives the control gear rod 306 to move backward. At this time, the control gear rod 306 drives the clamping gear 311 to rotate through the side gear block. The clamping gear 311 drives the clamping frame 309 and the rolling column 310 to clamp the ring on the top of the fuel assembly 114. Through the application of the above components, a limiting clamping force is provided for the top of the fuel assembly 114 to prevent the fuel assembly 114 from tilting. The tilt causes excessive contact force with the inclined roller 206, causing dents or damage to the side of the fuel assembly 114. The electric telescopic rod 102 continuously extends and retracts, and a sliding frame 301 and a mounting plate 302 are arranged inside the device. When the device is about to complete the detection, the placement plate 103 also retracts upward to the highest point. At this time, the top of the placement plate 103 contacts the bottom of the sliding frame 301. As the electric telescopic rod 102 continues to retract, the broken mounting plate 302 is moved upward, and the mounting plate 302 is separated from the bottom limiting bracket 104. The telescopic rod 303 is powered on and generates an upward thrust, which forces the control gear rod 306 to move upward. When the control gear rod 306 moves upward, the inclined push block 305 loses the restriction on the roller 308.Under the push of the outward push spring 307, the control gear rod 306 is reset, and the outer wall tooth block of the control gear rod 306 drives the clamping frame 309 to open to both sides, so that the clamping frame 309 is away from the outer wall of the fuel assembly 114, so as to avoid the clamping frame 309 causing friction with the outer wall of the fuel assembly 114 during subsequent external lifting equipment transportation, thereby affecting the integrity of the assembly.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A nuclear power new fuel assembly maintenance gripper, comprising a power mechanism (1), the power mechanism (1) further comprising a fixed plate (101), the bottom of the fixed plate (101) being fixedly connected to an electric telescopic rod (102), the end of the electric telescopic rod (102) away from the fixed plate (101) being fixedly connected to a placement plate (103), characterized in that: Also includes: A rotating mechanism (2), the rotating mechanism (2) comprising a storage air box (201) fixedly connected to the side wall of the fixed plate (101), a plurality of air pressure ring tubes (202) penetratingly connected to the side wall of the storage air box (201), a plurality of air pressure ring tubes (202) rotatably connected to the inner walls of the plurality of air pressure ring tubes (202), and a plurality of sliding tubes (203) penetratingly connected to the side wall of the rotating sealing plate (210); The clamping mechanism (3) comprises a sliding frame (301) slidably connected to the inner wall of the fixed plate (101), the top of the sliding frame (301) is fixedly connected to a mounting plate (302), and the top of the mounting plate (302) is fixedly connected to a telescopic rod (303).

2. A nuclear power new fuel assembly maintenance gripper according to claim 1, characterized in that: The power mechanism (1) further comprises a limiting bracket (104) fixedly connected to the top of the fixed plate (101); a rotating column (105) is rotatably connected to the inner wall of the limiting bracket (104); a gear 2 (107) is fixedly connected to the side wall of the rotating column (105); an end of the rotating column (105) away from the gear 1 (106) is fixedly connected to the gear 2 (107); a pushing gear rod (108) is fixedly connected to the top of the placement plate (103); an outer wall of the pushing gear rod (108) is meshedly connected to the outer wall of the gear 1 (106); and a mounting frame (109) is fixedly connected to the side wall of the fixed plate (101).

3. A nuclear power new fuel assembly maintenance gripper according to claim 2, characterized in that: The power mechanism (1) also includes a pressurized gas groove (110) opened on the outer wall of the placement plate (103), a return spring (111) is fixedly connected to the inner wall of the pressurized gas groove (110), a pressurized plate (112) is slidably connected to the inner wall of the pressurized gas groove (110), a transmission gas pipe (113) is connected through the inner wall of the through hole on the placement plate (103), and the end of the transmission gas pipe (113) away from the placement plate (103) is connected through the side wall of the storage gas box (201), and the top of the pressurized plate (112) is rotatably connected to a rotating ring (115), and a fuel assembly (114) is placed on the top of the rotating ring (115).

4. A nuclear power new fuel assembly maintenance gripper according to claim 3, characterized in that: The rotating mechanism (2) further comprises a pushing plate (204) slidably connected to the inner walls of the plurality of sliding tubes (203); an output rod (205) is fixedly connected to the side wall of the pushing plate (204); and an end of the output rod (205) away from the pushing plate (204) is fixedly connected to an inclined roller (206).

5. A nuclear power new fuel assembly maintenance gripper according to claim 4, characterized in that: The rotating mechanism (2) further comprises a rotating ring (207) rotatably connected to the top of the air pressure ring tube (202); a ring gear (209) is fixedly connected to the outer wall of the rotating ring (207); a plurality of limiting vertical rods (208) are fixedly connected to the bottom of the rotating ring (207); the outer wall of the limiting vertical rod (208) is slidably connected to the outer wall of the sliding tube (203); and the outer wall of the ring gear (209) is rotatably connected to the outer wall of the gear 2 (107).

6. A nuclear power new fuel assembly maintenance gripper according to claim 5, characterized in that: The clamping mechanism (3) further comprises a pushing plate (304) fixedly connected to one end of the telescopic rod (303) away from the mounting plate (302); a bevel push block (305) is fixedly connected to the top of the pushing gear rod (108); a control gear rod (306) is slidably connected to the top of the pushing plate (304); and an outward push spring (307) is fixedly connected to the inner wall of the control gear rod (306).

7. A nuclear power new fuel assembly maintenance gripper according to claim 6, characterized in that: The clamping mechanism (3) further comprises a roller (308) rotatably connected to the inner wall of the control gear rod (306); the top of the push plate (304) is rotatably connected to a clamping frame (309); a rolling column (310) is fixedly connected to the inner wall of the clamping frame (309); a clamping gear (311) is fixedly connected to the rotational position of the clamping frame (309); and the outer wall of the clamping gear (311) is meshingly connected to the outer wall of the control gear rod (306).

8. The nuclear power new fuel assembly maintenance gripper according to any one of claim 7, characterized in that: The method for using the maintenance gripper comprises the following steps: S1: When the staff of the present invention needs to inspect, the fuel assembly (114) to be inspected is lifted by a sling, and passed through the air pressure ring tube (202), and the fuel assembly (114) is placed on the top of the rotating ring (115); S2: The high-quality fuel assembly (114) compresses the pressure plate (112) to move downward, and the air inside the pressure gas tank (110) is squeezed by the pressure plate (112) and enters the storage gas box (201) through the transmission gas pipe (113); S3: The internal gas of the storage gas box (201) enters the inner wall of the sliding tube (203), forcing the push plate (204) to move outward. During the outward movement of the push plate (204), the inclined roller (206) is pushed by the push plate (204) to contact the outer wall of the fuel assembly (114).

Images