A nuclear power plant reactor control protection system cable maintenance automated dismounting tool

Abstract

The present application relates to the field of nuclear reactor maintenance tool, especially to a kind of nuclear power plant reactor control protection system cable maintenance automation dismounting tool.The tool includes: control module and power module are installed in handheld component shell by fixed slot;Control module is connected with power module;Power module includes DC brushless motor and mechanical torque protection device, DC brushless motor is connected with mechanical torque protection device;Mechanical torque protection device is fixedly assembled with the shaft end of execution module;Execution module drives buckle module to rotate;Handheld component shell is fixedly connected with quick-mounting module fixed seat by connecting piece;Buckle module is installed below execution module, can be replaced according to different cable models, for clamping cable female head;The quick-mounting module is used for holding cable head flange part, and is fixed above execution module support shell.The present application is easy to operate, and improves work efficiency.

Description

Technical Field

[0001] This invention relates to the field of nuclear reactor maintenance tools, and more particularly to an automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system. Background Technology

[0002] VVER-type nuclear reactors have a large number of control and protection system devices. During each major overhaul, as a critical path, it is necessary to remove and install the reactor top instrumentation and control cables and the neutron flux measurement system communication cables. Currently, this can only be done manually. This mainly involves the removal and installation of 268 threaded connectors for the instrumentation and control cables on the reactor shaft concrete wall side and 206 threaded connectors for the control rod drive mechanism side. This work needs to be carried out for a long time in harsh environments with high ambient temperature, high ambient radiation dose, narrow working space, and a large number of work objects. It requires multiple shifts of staff to complete the removal and installation of the cable connectors on the reactor concrete wall side and the control rod drive side, which requires manual operation. This work occupies about 20 hours of the critical path during the overhaul, and there is a risk of heatstroke among the staff during the long working hours.

[0003] The following are the main problems encountered during the current manual maintenance of reactor control and protection system cables:

[0004] 1. There are numerous pieces of equipment to be repaired, and the spacing between them is narrow, making manual operation difficult;

[0005] 2. Due to the high temperature and high radiation dose in the working environment, the working time of a single person is limited, the number of items to be dismantled and installed is limited, and the overall working time is relatively long;

[0006] 3. Multiple staff rotations are required to complete the overall work, posing risks such as heatstroke and excessive collective radiation dose. Summary of the Invention

[0007] The technical problem to be solved by this invention is to provide an automated disassembly and assembly tool for the maintenance of cables in the reactor control and protection system of a nuclear power plant, which is easy to operate and improves work efficiency.

[0008] This invention provides an automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system. The tool comprises: a handheld component housing, a snap-fit ​​module, a quick-assembly module, an execution module, a power module, and a control module.

[0009] The power module includes a mechanical torque protection device and a brushless DC motor, which is snapped onto the front end of the handheld component housing.

[0010] The rear end of the mechanical torque protection device is connected to the DC brushless motor via gear meshing on the same shaft.

[0011] The control module is located inside the handheld component housing and controls the DC brushless motor;

[0012] The execution module includes: a support housing, a fixed base, a drive gear shaft, a second deep groove ball bearing, a drive cylindrical gear, an elastic retaining ring, a sliding support shaft, an execution gear, and a cylindrical gear;

[0013] A second deep groove ball bearing is installed on the support housing, and the drive gear shaft is inserted into the second deep groove ball bearing.

[0014] The cylindrical gear, gearbox spacer, and first deep groove ball bearing are sequentially fitted onto the drive gear shaft;

[0015] The lower end of the fixed base is fixedly connected to the upper end of the support housing;

[0016] The first deep groove ball bearing is fixedly installed inside the fixed seat;

[0017] The lower surface of the cylindrical gear contacts the shoulder on the other side of the drive gear shaft, and the upper surface of the cylindrical gear contacts the gearbox spacer.

[0018] The drive cylindrical gears are respectively fitted onto the gear shaft from below the support housing and are limited by elastic retaining rings;

[0019] The actuating gear is sleeved on the sliding support shaft, and its lower end contacts the upper surface of the flange of the sliding support shaft. The actuating gear rotates around the sliding support shaft.

[0020] The actuating gear meshes with the driving cylindrical gear; the sliding support shaft, the actuating gear, and the support housing are provided with openings;

[0021] The buckle module includes: a claw base, a buckle spacer, a front and back buckle, a paddle, an ear pin, a movable end spring buckle, a spring, and a fixed end spring buckle;

[0022] The paddle, the front and back buckles, and the buckle spacer are sequentially placed on the ear pin, and the cylindrical part of the ear pin is inserted into the round hole below the paddle base;

[0023] The upper end of the claw base is fixedly connected to the lower end of the actuating gear;

[0024] The fixed end spring buckle is connected to the ear pin. One end of the spring is fitted into the groove of the fixed end spring buckle, and the other end is fitted into the groove of the movable end spring buckle. The head of the movable end spring buckle passes through the threaded hole on one side of the lever and is threadedly connected to it. The cylindrical part of the movable end spring buckle protruding from the lever contacts one outer side of the positive and negative latches, giving the positive and negative latches an outward force to prevent the positive and negative latches from slipping off.

[0025] The quick-install module is connected to and secured with the fixed seat pin.

[0026] Preferably, the control module includes: a drive board, a throttle switch, a battery, a plug, a forward / reverse switch, an electronic control core board, and a power switch;

[0027] The drive board and the electronic control core board are fixed inside the handheld component housing.

[0028] The throttle switch, plug, forward / reverse switch, and power switch are each fixed in the mounting slots of the handheld component housing.

[0029] The throttle switch, forward / reverse switch are electrically connected to the electronic control core board, and the corresponding wires are connected according to the circuit design.

[0030] The DC brushless motor is electrically connected to the electronic control core board;

[0031] The plug electrode is inserted into the battery slot, and the battery is connected to the slot at the lower end of the handheld component housing. The battery is an external type.

[0032] Preferably, the handheld component housing includes an upper housing and a lower housing, which are arranged opposite to each other to form a complete handheld component housing, and the upper housing and the lower housing are fixed together by screws;

[0033] The drive board and the electronic control core board are respectively fixed to the threaded holes of the lower housing and the upper housing by screws.

[0034] The throttle switch, plug, forward / reverse switch, and power switch are respectively fixed to the mounting groove at the end of the lower housing of the handheld component, the fixing groove of the lower housing of the handheld component, the U-shaped groove of the lower housing of the handheld component, and the mounting hole of the upper housing of the handheld component, and the corresponding wires are connected according to the circuit design;

[0035] The throttle switch, plug, forward / reverse switch, and power switch are electrically connected to the electronic control core board; the battery is electrically connected to the plug; the electronic control core board is used to send logical motion commands to the drive board.

[0036] Preferably, the brushless DC motor is fitted with the first annular groove of the upper and lower housings through its own flange;

[0037] The mechanical torque protection device is fixed to the second annular groove of the upper and lower housings via its own flange, and the torque can be adjusted according to the operation requirements.

[0038] The brushless DC motor is electrically connected to the drive board, which is used to drive and control the rotation of the brushless DC motor.

[0039] Preferably, the execution module further includes: a transition gear shaft and a gear shaft;

[0040] The transition gear shaft and the gear shaft are respectively inserted into the second deep groove ball bearing.

[0041] The drive gear shaft is located at the center, with transition gear shafts on both sides and a gear shaft on the outside of the transition gear shafts;

[0042] The cylindrical gear, gearbox spacer, and first deep groove ball bearing are sequentially fitted onto the transition gear shaft and gear shaft, respectively.

[0043] The lower surface of the cylindrical gear contacts the shoulder on the other side of each gear shaft, and the upper surface of the cylindrical gear contacts the gearbox spacer. Several cylindrical gears mesh in sequence.

[0044] Preferably, in the execution module,

[0045] Five second deep groove ball bearings are fixedly installed in five second bearing mounting holes arranged in an arc above the support housing; one end of the drive gear shaft is inserted into the second deep groove ball bearing located at the center of the support housing, and the shoulder side of the drive gear shaft contacts the second deep groove ball bearing; one end of each of the two transition gear shafts is inserted into the second deep groove ball bearings on both sides of the drive gear shaft, and the shoulder side of the transition gear shaft contacts the second deep groove ball bearing; one end of each of the two gear shafts is inserted into two second deep groove ball bearings near the transition gear shaft, and the shoulder side of the gear shaft contacts the second deep groove ball bearing.

[0046] Preferably, the elastic retaining ring is engaged in the annular groove at the lower end of the gear shaft to axially limit the gear shaft.

[0047] Preferably, the actuating gear meshes with two driving cylindrical gears; the rotation of the driving gear shaft located at the center of the support housing drives its own cylindrical gear to rotate, which in turn drives the cylindrical gears on both sides to rotate. The cylindrical gears located on both sides of the support housing rotate coaxially with the driving cylindrical gears, which in turn drives the actuating gear to rotate around the sliding support shaft.

[0048] Preferably, it also includes a level bubble, which is fixedly installed in a level bubble mounting hole provided above the fixing base, and is used to determine the horizontal position of the disassembly and assembly tool when it is installed on the cable.

[0049] Preferably, the quick-install module includes: a wing nut, a hexagonal head self-extruding screw, a locking pin, a nut, a clamping block, and a pin shaft;

[0050] The third pin hole of the clamping block and the first pin hole of the fixed base are concentrically fixed together by a pin shaft. The clamping block rotates around the pin shaft to clamp or release the cable.

[0051] The locking pin is inserted into the second pin hole from above the clamping block, and the locking pin can rotate therein; one end of the hexagonal head self-extracting screw passes through the locking pin and is fixed with a nut, and the other end is threadedly connected to the wing nut; when the tool clamps the cable, the end of the wing nut is twisted and squeezed into contact with the groove of the fixing seat, thereby locking the cable.

[0052] Preferably, it further includes a connector, which is a hollow component;

[0053] The connector connects the handheld component housing to the fixed base;

[0054] The mechanical torque protection device passes through the connector;

[0055] The DC brushless motor is located inside the front end of the handheld component housing.

[0056] Compared with the prior art, the automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system of the present invention has the following advantages:

[0057] (1) First, it can be applied to the automated disassembly and assembly of cables in the complex nuclear power plant reactor operation environment, reducing labor intensity and improving work efficiency;

[0058] (2) The handheld component structure conforms to human ergonomics and meets functional requirements;

[0059] (3) A mechanical torque protection device is applied, and the torque can be adjusted as needed;

[0060] (4) A drive structure with double active gears and incomplete gear ring is adopted to meet the requirements of high rigidity and high reliability of transmission while meeting the requirements of narrow boundary size;

[0061] (5) The buckle module adopts a forward and reverse buckle structure design. The actuator gear drives the buckle drive nut to rotate forward and reverse to realize the removal and installation of the cable;

[0062] (6) A quick-installation module was designed to quickly tighten the cable and improve work efficiency. Attached Figure Description

[0063] Figure 1 This is a schematic diagram of the overall structure of the automatic disassembly and assembly tool of the present invention;

[0064] Figure 2 This is an exploded view of the handheld component of the automatic disassembly and assembly tool of the present invention. Figure 1 ;

[0065] Figure 3 This is an exploded view of the handheld component of the automatic disassembly and assembly tool of the present invention. Figure 2 ;

[0066] Figure 4 This is an exploded view of the automatic disassembly and assembly tool execution module of the present invention;

[0067] Figure 5 This is a schematic diagram of the automatic disassembly and assembly tool buckle module of the present invention;

[0068] Figure 6 This is an exploded structural diagram of the quick-assembly module of the automatic disassembly and assembly tool of the present invention;

[0069] In the picture:

[0070] 1. Snap-on module, 2. Quick-release module, 3. Execution module, 4. Power module, 5. Control module, 6. Connector, 7. Mechanical torque protection device, 701 Mechanical torque protection device flange, 8. DC brushless motor, 9. Lower housing, 901 Front flange, 902 Second annular groove, 903 First annular groove, 904 Lower housing threaded hole, 905 Lower housing end mounting groove, 906 Lower housing fixing groove, 907 Lower housing U-shaped groove, 908 Handheld component housing lower end groove, 10. Drive board, 11. Throttle switch, 12. Battery, 13. Plug, 14. Forward / reverse switch, 15. Electronic control core board, 16. Upper housing, 1601 Upper housing threaded hole, 1602 Upper housing mounting hole, 17. Power switch, 18. Drive gear shaft, 19. Transition gear shaft, 20. Gear shaft, 21. First deep groove ball. Bearing, 22 Gearbox spacer, 23 Second deep groove ball bearing, 24 Drive cylindrical gear, 25 Elastic retaining ring, 26 Sliding support shaft, 27 Actuating gear, 28 Support housing, 2801 Second bearing mounting hole, 2802 Fixing hole, 29 Cylindrical gear, 30 Fixing seat, 3001 First deep groove ball bearing mounting hole, 3002 Horizontal bubble mounting hole, 3003 Slot, 3004 First pin hole, 31 Paw base, 32 Snap-on spacer, 33 Positive and negative snap-on, 34 Paddle, 35 Ear pin, 36 Movable end spring buckle, 37 Spring, 38 Fixed end spring buckle, 39 Cable threaded sleeve, 40 Horizontal bubble, 41 Wing nut, 42 Hex head self-extracting screw, 43 Locking pin, 44 Nut, 45 Clamping block, 4501 Second pin hole, 4502 Third pin hole, 46 Pin shaft. Detailed Implementation

[0071] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0072] Combination Figures 1 to 5 An embodiment of the present invention provides an automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system, comprising: a handheld component housing, a snap-fit ​​module 1, a quick-assembly module 2, an execution module 3, a power module 4, and a control module 5;

[0073] Both the control module 5 and the quick-installation module 2 are installed inside the handheld component housing via a fixing slot; the control module 5 is connected to the quick-installation module 2; the quick-installation module 2 includes a DC brushless motor 8 and a mechanical torque protection device 7, the DC brushless motor 8 being connected to the mechanical torque protection device 7; the mechanical torque protection device 7 is fixedly assembled to the shaft end of the execution module 3; the execution module 3 drives the latching module to rotate, used for tightening and loosening the cable; the handheld component housing is fixedly connected to the quick-installation module 2 fixing seat via a connector; the latching module 1 is installed below the execution module 3 and can be replaced according to different cable models, used to latch the cable female end; the quick-installation module 2 is used to hold the cable head flange part and is fixed above the execution module support housing.

[0074] The handheld component housing includes an upper housing 16 and a lower housing 9, which are arranged opposite to each other to form a complete handheld component housing. The upper housing 16 and the lower housing 9 are fixed together by screws. The control module 5 includes:

[0075] Drive board 10, throttle switch 11, battery 12, plug 13, forward / reverse switch 14, electronic control core board 15, and power switch 17;

[0076] The drive board 10 and the electronic control core board 15 are respectively fixed to the threaded hole 904 of the lower housing and the threaded hole 1601 of the upper housing with screws; the throttle switch 11, plug 13, forward / reverse switch 14 and power switch 17 are respectively fixed to the mounting groove 905 at the end of the lower housing, the fixing groove 906 of the lower housing, the U-shaped groove 907 of the lower housing and the mounting hole 1602 of the upper housing, and the corresponding wires are connected according to the circuit design; the electrode plate of the plug 13 is inserted into the slot of the battery 12, and the battery 12 is connected to the slot 908 at the lower end of the handheld component housing. The battery 12 is external, which is convenient for replacement and carrying;

[0077] It also includes: a connector 6, which is fixed to the front flange 901 of the handheld component housing and the upper screw of the fixing seat 30 by front and rear flanges respectively; the connector 6 is a hollow part with a mechanical torque protection device 7 inside;

[0078] The power module 4 includes a mechanical torque protection device 7 and a brushless DC motor 8. The brushless DC motor 8 is fitted with the first annular groove 903 of the upper housing 16 and the lower housing 9 through a brushless DC motor flange, and is coaxially connected to the rear end of the mechanical torque protection device 7 through gear meshing. The mechanical torque protection device 7 is fixed to the second annular groove 902 of the upper housing 16 and the lower housing 9 through a mechanical torque protection device flange 701, and its head extends into the connector 6 to cooperate with the drive gear shaft 18 for installation, and the torque can be adjusted according to the operation requirements. The mechanical torque protection device 7, the brushless DC motor 8, the drive board 10, the throttle switch 11, the battery 12, the plug 13, the forward and reverse switch 14, the electronic control core board 15, and the power switch 17 are connected by corresponding wires according to the circuit design.

[0079] Specifically, the wiring connection is as follows: the brushless DC motor 8 is electrically connected to the drive board 10; the drive board 10 is electrically connected to the electronic control core board 15; the throttle switch 11, plug 13, forward / reverse switch 14, and power switch 17 are electrically connected to the electronic control core board 15 respectively; the battery 12 is electrically connected to the plug 13; the drive board 10 is used to drive and control the rotation of the brushless DC motor 8, and the electronic control core board 15 is used to send logical motion commands to the drive board 10, as well as provide functions such as parameter display, torque adjustment, and tool reset for the human-machine interface;

[0080] The execution module 3 includes a drive gear shaft 18, a transition gear shaft 19, a gear shaft 20, a first deep groove ball bearing 21, a gearbox spacer 22, a second deep groove ball bearing 23, a drive cylindrical gear 24, an elastic retaining ring 25, a sliding support shaft 26, an execution gear 27, a support housing 28, a cylindrical gear 29, and a fixed seat 30. The five second deep groove ball bearings 23 are respectively fixedly installed in five second bearing mounting holes 2801 arranged in an arc above the support housing 28; one end of the drive gear shaft 18 is inserted into the second deep groove ball bearing 23 located at the center of the support housing, and one shoulder of the drive gear shaft 18 contacts the second deep groove ball bearing 23; one end of each of the two transition gear shafts 19 is inserted into the second deep groove ball bearings 23 on both sides of the drive gear shaft 18, and one shoulder of the transition gear shaft 19 contacts the second deep groove ball bearing 23; one end of each of the two gear shafts 20 is inserted into two second deep groove ball bearings 23 near the transition gear shaft 19, and one shoulder of the gear shaft 20 contacts the first deep groove ball bearing 23. Two deep groove ball bearings 23 are in contact; five cylindrical gears 29, five gearbox spacers 22, and five first deep groove ball bearings 21 are respectively fitted onto the drive gear shaft 18, two transition gear shafts 19, and two gear shafts 20. The lower surface of the cylindrical gears contacts the shoulder on the other side of each gear shaft, and the upper surface of the cylindrical gears contacts the gearbox spacers 22; the five cylindrical gears 29 mesh sequentially; the five first deep groove ball bearings 21 are respectively fixedly installed in the first bearing mounting holes 3001 provided inside the fixed seat 30; two drive cylindrical gears 24 are respectively fitted onto the two gear shafts 20 from below the support housing 28, and elastic retaining rings 25 are stuck below the gear shafts 20. The gear shaft 20 is axially limited within the annular groove at the end; the actuating gear 27 is sleeved on the sliding support shaft 26, with its lower end contacting the upper surface of the flange of the sliding support shaft 26, allowing the actuating gear 27 to rotate around the sliding support shaft 26; the sliding support shaft 26 is fixed to the fixing hole 2802 of the support housing 28 by screws; the lower end of the fixing seat 30 is fixedly connected to the upper end of the support housing 28 by screws; the actuating gear 27 meshes with two driving cylindrical gears 24; the rotation of the driving gear shaft 18 located at the center of the support housing 28 drives its own cylindrical gear 29 to rotate, thereby driving the cylindrical gears 29 on both sides of the support housing 28 to rotate. The cylindrical gear 29 rotates coaxially with the driving cylindrical gear 24, thereby driving the actuating gear 27 to rotate around the sliding support shaft 26; the sliding support shaft 26, the actuating gear 27, and the support housing 28 are provided with openings for clamping and disassembling cables; the buckle module 1 includes a claw base 31, a buckle spacer 32, a positive and negative buckle 33, a paddle 34, an ear pin 35, a movable end spring buckle 36, a spring 37, and a fixed end spring buckle 38; the paddle 34, the positive and negative buckle 33, and the buckle spacer 32 are sequentially fitted onto the ear pin 35, and the cylinder of the ear pin 35 is inserted into the circular hole below the claw base 31 and fixed to the claw base 31 by screws inside the cylinder of the ear pin 35;When the tool clamps the cable, the positive and negative latches 33 hook onto the groove on the surface of the cable threaded sleeve 39; the fixed end spring latch 38 is threadedly connected to the threaded hole on the flange of the lug 35, one end of the spring 37 is fitted into the groove of the fixed end spring latch 38, and the other end is fitted into the groove of the movable end spring latch 36; the head of the movable end spring latch 36 passes through the threaded hole on one side of the lever 34 and is threadedly connected to it, the cylindrical part of the movable end spring latch 36 protruding from the lever 34 contacts one outer side of the positive and negative latches 33, giving the positive and negative latches 33 an outward force to prevent the positive and negative latches 33 from slipping off; the upper end of the pawl base 31 is screwed to the lower end of the actuating gear 27, the rotation of the actuating gear 27 drives the pawl base 31 and the positive and negative latches 33 to rotate, thereby causing the cable threaded sleeve 39 to rotate accordingly, realizing the installation and removal of the cable;

[0081] The quick-installation module 2 includes a horizontal bubble 40, a wing nut 41, a hexagonal self-extracting screw 42, a locking pin 43, a nut 44, a clamping block 45, and a pin 46. The horizontal bubble 40 is fixedly installed in the horizontal bubble mounting hole 3002 provided above the fixing base 30 to determine the horizontal position of the disassembly and assembly tool when it is installed on the cable. The third pin hole 4502 of the clamping block 45 is concentrically fixed to the first pin hole 3004 of the fixing base 30 by the pin 46. 5. The cable can be clamped or released by rotating around the pin 46; the locking pin 43 is inserted into the second pin hole 4501 above the clamping block 45, and the locking pin 43 can rotate; one end of the hexagonal head self-extracting screw 42 passes through the locking pin 43 and is fixed with the nut 44, and the other end is threaded to the wing nut 41; when the tool clamps the cable, the end of the wing nut 41 is pressed into contact with the groove of the fixing seat 30 by twisting the wing nut 41, thereby locking the cable;

[0082] This invention discloses an automated cable installation and removal tool for nuclear power plant control and protection systems. When performing cable installation, an external battery is inserted, the battery level is checked, and the operating status switch is confirmed to be in forward rotation mode (locking installation mode). The mechanical torque protection device is adjusted, with a default setting of 5-25 Nm. The cable connector and cable are placed into the connector quick-clamping mechanism through the opening side of the automated cable installation and removal tool, and the cable head flange is clamped by the quick-release module. The throttle switch is pressed to rotate the head arbitrarily, or the connector nut is manually moved. After rotation, the forward and reverse latches automatically engage in the nut slots. The automated cable installation and removal tool is placed vertically and calibrated using a spirit level to ensure the female and male threads are as perpendicular as possible and in contact. The throttle switch button is pressed, causing the tool to rotate the nut, which automatically screws in and begins to lock. After tightening, the quick-release module's nut is released, the cable installation and removal tool is removed, and the removal of the next cable begins.

[0083] The cable removal process is similar to the installation process. Insert an external battery into the automated cable removal tool, check the battery level, and confirm that the working status switch is in reverse mode (release removal mode). Adjust the mechanical torque protection device; the default setting is 5-25 Nm. Place the cable connector and cable into the connector quick-clamping mechanism through the opening side of the automated cable removal tool, and clamp the cable head flange part through the quick-release module. Press the throttle switch to rotate the head arbitrarily, or manually turn the connector nut. After rotation, the forward and reverse clips will automatically engage in the nut slots. Place the automated cable removal tool vertically and use a spirit level to calibrate it, ensuring that the female thread and male thread are as perpendicular as possible and in contact with each other. Press the throttle switch button; the tool will drive the nut to rotate, automatically unscrewing to begin cable release. After the cable is completely released, loosen the nut of the quick-release module, remove the automated cable removal tool, and begin the removal of the next cable.

[0084] In summary, the invention of this automated cable removal and installation tool enables the rapid completion of cable removal and installation in the reactor control and protection system. While improving work efficiency, it reduces the collective dose to personnel and lowers the risk of heatstroke and excessive radiation dose for personnel working for extended periods in high-temperature and high-radiation environments. The tool is driven by a low-voltage power supply and also incorporates functions such as foreign object protection and collision protection. Its use in the field directly reduces the main overhaul work time, generating significant social and economic benefits. It also effectively reduces the collective dose level of the working group personnel, achieving the ALARA (Allow, Allowable, Lowest) principle of radiation protection.

[0085] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0086] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system, characterized in that, include: Handheld component housing, snap-fit ​​module (1), quick-release module (2), execution module (3), power module (4) and control module (5); The power module (4) includes a mechanical torque protection device (7) and a DC brushless motor (8), which is snapped onto the front end of the handheld component housing; The rear end of the mechanical torque protection device (7) is connected to the DC brushless motor (8) via gear meshing on the same shaft. The control module (5) is located inside the handheld component housing and controls the DC brushless motor (8); The execution module (3) includes: a support housing (28), a fixed seat (30), a drive gear shaft (18), a second deep groove ball bearing (23), a drive cylindrical gear (24), an elastic retaining ring (25), a sliding support shaft (26), an execution gear (27), and a cylindrical gear (29); A second deep groove ball bearing (23) is installed on the support housing (28), and the drive gear shaft (18) is inserted into the second deep groove ball bearing (23). The cylindrical gear (29), gearbox spacer (22) and first deep groove ball bearing (21) are sequentially fitted onto the drive gear shaft (18); The lower end of the fixed base (30) is fixedly connected to the upper end of the support housing (28); The first deep groove ball bearing (21) is fixedly installed inside the fixed seat (30); The lower surface of the cylindrical gear (29) contacts the shoulder on the other side of the drive gear shaft (18), and the upper surface of the cylindrical gear (29) contacts the gearbox spacer (22); The drive cylindrical gear (24) is fitted onto the gear shaft (20) from below the support housing (28) and is limited by the elastic retaining ring (25); The actuating gear (27) is sleeved on the sliding support shaft (26), and its lower end contacts the upper surface of the flange of the sliding support shaft (26). The actuating gear (27) rotates around the sliding support shaft (26). The actuating gear (27) meshes with the driving cylindrical gear (24); the sliding support shaft (26), the actuating gear (27), and the support housing (28) are provided with openings; The buckle module (1) includes: a claw base (31), a buckle spacer (32), a front and back buckle (33), a paddle (34), an ear pin (35), a movable end spring buckle (36), a spring (37), and a fixed end spring buckle (38); The paddle (34), the front and back buckles (33) and the buckle spacer (32) are sequentially put on the ear pin (35), and the cylinder of the ear pin (35) is inserted into the round hole below the paddle base (31); The upper end of the claw base (31) is fixedly connected to the lower end of the actuating gear (27); The fixed end spring buckle (38) is connected to the ear pin (35). One end of the spring (37) is fitted onto the groove of the fixed end spring buckle (38), and the other end is fitted onto the groove of the movable end spring buckle (36). The head of the movable end spring buckle (36) passes through the threaded hole on one side of the lever (34) and is threadedly connected to it. The cylindrical part of the movable end spring buckle (36) protruding from the lever (34) contacts one outer side of the positive and negative buckle (33), giving the positive and negative buckle (33) an outward force to prevent the positive and negative buckle (33) from slipping off. The quick-install module (2) is connected and secured to the fixed base (30) by a pin.

2. The automated disassembly and assembly tool for the maintenance of cables in the nuclear power plant reactor control and protection system according to claim 1, characterized in that, The control module (5) includes: a drive board (10), a throttle switch (11), a battery (12), a plug (13), a forward / reverse switch (14), an electronic control core board (15), and a power switch (17); The drive board (10) and the electronic control core board (15) are fixed inside the handheld component housing. The throttle switch (11), plug (13), forward / reverse switch (14), and power switch (17) are respectively fixed in the mounting slots of the handheld component housing. The throttle switch (11), the forward and reverse switch (14) are electrically connected to the electronic control core board (15), and the corresponding wires are connected according to the circuit design. The DC brushless motor (8) is electrically connected to the electronic control core board (15); The plug (13) electrode is inserted into the slot of the battery (12), and the battery (12) is connected to the slot (908) at the lower end of the handheld component housing. The battery (12) is an external type.

3. The automated disassembly and assembly tool for the maintenance of cables in the nuclear power plant reactor control and protection system according to claim 2, characterized in that, The handheld component housing includes an upper housing (16) and a lower housing (9), which are arranged opposite to each other to form a complete handheld component housing. The upper housing (16) and the lower housing (9) are fixed together by screws. The drive board (10) and the electronic control core board (15) are respectively fixed to the threaded hole (904) of the lower housing and the threaded hole (1601) of the upper housing by screws; The throttle switch (11), plug (13), forward / reverse switch (14) and power switch (17) are respectively fixed to the mounting groove (905) at the end of the lower housing of the handheld component, the fixing groove (906) of the lower housing of the handheld component, the U-shaped groove (907) of the lower housing of the handheld component and the mounting hole (1602) of the upper housing of the handheld component, and the corresponding wires are connected according to the circuit design. The throttle switch (11), plug (13), forward / reverse switch (14) and power switch (17) are electrically connected to the electronic control core board (15); the battery (12) is electrically connected to the plug (13); the electronic control core board (15) is used to send logical motion commands to the drive board (10).

4. The automated disassembly and assembly tool for the maintenance of cables in the nuclear power plant reactor control and protection system according to claim 3, characterized in that, The brushless DC motor (8) is attached to the first annular groove (903) of the upper and lower housings through its own flange; The mechanical torque protection device (7) is fixed to the second annular groove (902) of the upper housing (16) and the lower housing (9) by its own flange, and the torque can be adjusted according to the operation requirements; The brushless DC motor (8) is electrically connected to the drive board (10), and the drive board (10) is used to drive and control the rotation of the brushless DC motor (8).

5. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 1, characterized in that, The execution module (3) further includes: a transition gear shaft (19) and a gear shaft (20); The transition gear shaft (19) and gear shaft (20) are respectively inserted into the second deep groove ball bearing (23). The drive gear shaft (18) is located in the center, and transition gear shafts (19) are provided on both sides of it. Gear shafts (20) are provided on the outside of the transition gear shafts (19). Cylindrical gear (29), gearbox spacer (22) and first deep groove ball bearing (21) are respectively fitted onto transition gear shaft (19) and gear shaft (20); The lower surface of the cylindrical gear (29) contacts the shoulder on the other side of each gear shaft, and the upper surface of the cylindrical gear (29) contacts the gearbox spacer (22). Several cylindrical gears (29) mesh in sequence.

6. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 5, characterized in that, In the execution module (3), Five second deep groove ball bearings (23) are fixedly installed in five second bearing mounting holes (2801) arranged in an arc above the support housing (28); one end of the drive gear shaft (18) is inserted into the second deep groove ball bearing (23) located at the center of the support housing, and the shoulder side of the drive gear shaft (18) contacts the second deep groove ball bearing (23); one end of each of the two transition gear shafts (19) is inserted into the second deep groove ball bearings (23) on both sides of the drive gear shaft (18), and the shoulder side of the transition gear shaft (19) contacts the second deep groove ball bearing (23); one end of each of the two gear shafts (20) is inserted into the two second deep groove ball bearings (23) near the transition gear shaft (19), and the shoulder side of the gear shaft (20) contacts the second deep groove ball bearing (23).

7. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 1, characterized in that, The elastic retaining ring (25) is engaged in the annular groove at the lower end of the gear shaft (20) to axially limit the gear shaft (20).

8. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 5, characterized in that, The actuating gear (27) meshes with two driving cylindrical gears (24); the driving gear shaft (18) located at the center of the support housing (28) rotates, driving its own cylindrical gear (29) to rotate, which in turn drives the cylindrical gears (29) on both sides to rotate. The cylindrical gears (29) located on both sides of the support housing (28) rotate coaxially with the driving cylindrical gears (24), which in turn drives the actuating gear (27) to rotate around the sliding support shaft (26).

9. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 1, characterized in that, It also includes a level bubble (40), which is fixedly installed in the level bubble mounting hole (3002) provided above the fixing base (30) to determine the horizontal position of the disassembly and assembly tool when it is installed on the cable.

10. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 1, characterized in that, The quick-install module (2) includes: a wing nut (41), a hexagonal head self-extruding screw (42), a locking pin (43), a nut (44), a clamping block (45), and a pin shaft (46); The third pin hole (4502) of the clamping block (45) and the first pin hole (3004) of the fixed seat (30) are concentrically fixed and fitted by the pin (46). The clamping block (45) rotates around the pin (46) to clamp or release the cable. The locking pin (43) is inserted into the second pin hole (4501) above the clamping block (45), and the locking pin (43) can rotate therein; one end of the hexagonal head self-extracting screw (42) passes through the locking pin (43) and is fixed with a nut (44), and the other end is threadedly connected to the wing nut (41); when the tool clamps the cable, the end of the wing nut (41) is squeezed into contact with the slot of the fixing seat (30) by twisting the wing nut, thereby locking the cable.

11. The automated disassembly and assembly tool for the maintenance of cables in a nuclear power plant reactor control and protection system according to claim 1, characterized in that, It also includes a connector (6), which is a hollow component; The connector (6) is connected between the handheld component housing and the fixed base (30); the mechanical torque protection device (7) passes through the connector (6); The DC brushless motor (8) is located inside the front end of the handheld component housing.

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