CN-116374807-B - Nuclear power plant radioactive waste compaction cake gripping apparatus

Abstract

The invention belongs to the field of radioactive waste treatment of nuclear power plants, and particularly relates to a radioactive waste compaction cake gripper of a nuclear power plant. The device comprises a driving fixing assembly, a rotating assembly, a compacting cake grabbing and placing assembly and an instrument detection switch, wherein the compacting cake grabbing and placing assembly is connected with the fixing assembly, the rotating assembly and the instrument detection switch. The invention has the advantages that (1) the compacting cake gripping apparatus is provided with the rotating motor, and the rotating motor is used for rotating the gripping apparatus at any angle so as to reduce manual rotation operation of a steel drum of an on-site operator and reduce operation dosage of the operator, and (2) the gripping apparatus adopts a steel wire rope lifting structure and adopts a mode of matching a guide wheel and a guide fixing plate, when the compacting cake assembly is lifted to the highest position, the guide plate 203 is matched with the guide wheel 104, and shaking of the compacting cake gripping apparatus can be prevented.

Inventors

• ZHOU CHENHAO
• YU DAWAN
• WANG PENG
• YANG YONGLIANG
• WANG KONGZHAO
• XU DONGWU

Assignees

• 中核核电运行管理有限公司
• 秦山核电有限公司

Dates

Publication Date

20260512

Application Date

20230310

Claims (6)

1. 1. The radioactive waste compaction cake gripping apparatus for the nuclear power plant is characterized by comprising a driving fixed assembly, a rotating assembly, a compaction cake gripping and placing assembly and an instrument detection switch, wherein the fixed assembly, the rotating assembly and the instrument detection switch are connected to the compaction cake gripping and placing assembly; the travelling crane fixing assembly comprises a shaft support, a shaft, a guide wheel and a guide wheel supporting plate, and is fixed on a travelling trolley of upstream hoisting equipment through the shaft support and the shaft; The guide wheel is matched with a rotating component fixing plate in the rotating component so as to reduce shaking of the compact cake gripper when the compact cake gripper moves along with the trolley; The rotary assembly comprises a lifting steel wire rope, a rotary motor, a rotary assembly fixing plate, a driving gear, a movable pulley and a rotary bearing, wherein the upstream of the lifting steel wire rope is connected with a trolley winding reel, the trolley winding reel rotates along with an upstream system to control the integral lifting of the compaction cake gripping device, the other end of the lifting steel wire rope penetrates through the movable pulley, the movable pulley is fixed on the upper surface of the rotary bearing, the rotary motor is a three-in-one motor and drives the driving gear to rotate, the driving gear is meshed with the rotary bearing, the rotary assembly fixing plate covers the outside of the rotary bearing, and the rotary bearing is fixedly connected with the compaction cake gripping device.
2. 2. The radioactive waste compact cake gripper for a nuclear power plant according to claim 1, wherein the guide wheels are provided with four groups in total along the circumferential direction, and the four groups correspond to the angles of the lifting steel wire ropes respectively.
3. 3. The radioactive waste compact cake gripper for a nuclear power plant according to claim 1, wherein the driving gear and the slewing bearing are externally meshed.
4. 4. The radioactive waste compact cake gripper of a nuclear power plant according to claim 1, wherein the compact cake gripping and placing assembly comprises a shield, an electric push rod, a structure guide plate and a gripping device, the shield is used for protecting a driving gear and a slewing bearing, the electric push rod comprises a sheath and an electric pushing mechanism, a connecting rod is connected with a clamp and drives the clamp to horizontally run, and the clamp is directly contacted with a compact cake.
5. 5. A radioactive waste compact cake gripper for a nuclear power plant as in claim 4, wherein said gripper is of a three-piece or four-piece construction.
6. 6. A radioactive waste compact gripper for a nuclear power plant as set forth in claim 1, wherein said meter detection switch comprises 3 detection switches.

Description

Nuclear power plant radioactive waste compaction cake gripping apparatus Technical Field The invention belongs to the field of radioactive waste treatment of nuclear power plants, and particularly relates to a radioactive waste compaction cake gripper of a nuclear power plant. Background The radioactive dry waste of the nuclear power plant is generally sorted and then is filled into 160L or 200L steel drums, and the steel drums are manually capped and then sent to an overpressure machine for overpressure so as to be changed into drum cakes. The over-pressurized barrel cake is filled into a 200L or 400L steel barrel by adopting a compaction cake gripper so as to carry out subsequent cement fixation. According to national standard requirements, when the steel barrel filled with the compacted cake is subjected to cement fixation, the periphery of the compacted cake is required to be provided with a cement fixing layer with the thickness of 20 mm-30 mm, so that the steel barrel filled with the compacted cake by nuclear power is internally provided with a compacted cake center support, and the center support is provided with three or a certain number of upright posts from the barrel bottom to the barrel upper surface. The compaction cake gripping apparatus is fixed on a room top guide rail through a steel wire rope and a trolley, the trolley moves to a compaction cake position, the steel wire rope descends, the gripping apparatus is opened, the gripping apparatus clamps the compaction cake again in a pneumatic or electric mode, the gripping apparatus ascends after clamping, the trolley moves to a position where a steel drum is located, the gripping apparatus lowers the drum cake to the bottom of the steel drum, and then the gripping apparatus ascends after opening. Considering the need for minimizing radioactive waste, the gap between the compact and the steel drum is typically the outside diameter of the open state of the compact gripper, and considering a certain margin, the position of the compact gripper must not overlap the position of the compact center support within the steel drum, otherwise the compact cannot be placed within the steel drum. Therefore, in order to pack the compact cakes, the compact cakes can be safely placed into the steel drum, personnel are required to go up the steel drum according to a fixed angle, the compact cake gripping apparatus is ensured to avoid the upright post of the central support, or the personnel are required to operate on site to manually rotate the steel drum. The operation is complicated, the personnel is easy to lose efficacy, the compacted cake has certain radioactivity, and certain external irradiation can be generated to personnel. Disclosure of Invention The invention aims to provide a compact cake gripping apparatus with a gripping apparatus rotating function, which can effectively reduce the labor intensity of personnel or external irradiation agent, an operator can rotate the gripping apparatus in a control room according to the display condition of a camera in the control room, and then the compact cake is filled in a steel drum, so that the operation that the personnel must go to the drum according to a specified angle or manually rotate the steel drum on site is avoided. The technical scheme is that the radioactive waste compaction cake gripping apparatus of the nuclear power plant comprises a driving fixed assembly, a rotating assembly, a compaction cake gripping and placing assembly and an instrument detection switch, wherein the fixed assembly, the rotating assembly and the instrument detection switch are connected to the compaction cake gripping and placing assembly. The traveling crane fixing assembly comprises a shaft support, a shaft, a guide wheel and a guide wheel supporting plate, and the fixing assembly is fixed on a traveling trolley of the upstream hoisting equipment through the shaft support and the shaft. The guide wheel is matched with a rotating assembly fixing plate in the rotating assembly, so that shaking of the compact cake gripping apparatus is reduced when the compact cake gripping apparatus moves along with the trolley. The guide wheels are provided with four groups in total along the circumferential direction, and the angles of the lifting steel wire ropes are respectively corresponding to the four groups. The rotary assembly comprises a lifting steel wire rope, a rotary motor, a rotary assembly fixing plate, a driving gear, a movable pulley and a rotary bearing, wherein the upstream of the lifting steel wire rope is connected with a trolley winding reel, the trolley winding reel rotates along with an upstream system to control the integral lifting of the compaction cake gripping device, the other end of the lifting steel wire rope penetrates through the movable pulley, the movable pulley is fixed on the upper surface of the rotary bearing, the rotary motor is a three-in-one motor and drives the driving gear to rotate, the drivin