Maintenance auxiliary device for corridor of nuclear power plant

Abstract

The utility model discloses an auxiliary device for nuclear power plant corridor maintenance. The auxiliary device comprises a rope box and a protection rope which are connected with each other, a plurality of supporting and limiting mechanisms are arranged on the circumferential side face of the rope box at intervals, each supporting and limiting mechanism comprises a connecting piece, a fixing piece, a threaded rod and a supporting piece, and the first end of each connecting piece is connected with the circumferential side face of the rope box; the first end of the fixing piece is connected with the connecting piece, the fixing piece can be contained in the connecting piece, one end of the supporting piece is connected with the second end of the fixing piece through the threaded rod, and an anti-skid piece is arranged at the end, away from the fixing piece, of the supporting piece. By means of the nuclear power plant corridor maintenance auxiliary device, it is ensured that nuclear power plant corridor maintenance work is smoothly carried out, maintenance personnel can safely and efficiently carry out maintenance work on a slope through the nuclear power plant corridor maintenance auxiliary device, and the stability and safety of the maintenance personnel can be kept even in the wet, slippery and severe environment.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a nuclear power plant corridor maintenance auxiliary device. Background Art

[0002] The circulating water corridor primarily uses CRF pumps to transport seawater to the condenser to remove heat. Each unit has two sections. Each overhaul requires structural protection, pipe wall inspection, and defect elimination. This is a secondary critical path during the overhaul, and the construction schedule is extremely tight. However, the Taipingling Nuclear Power Base's circulating water corridor has a 22m-long, 20° slope. Once the units are operational, a large amount of sediment will accumulate in the corridor. Coupled with the inclination and the harsh, slippery conditions, maintenance work is mainly carried out manually during maintenance, including structural protection, pipe wall inspection, and defect repair. These activities are usually carried out on fixed work platforms or temporary support structures to facilitate access and operation of various equipment and pipelines. Maintenance personnel cannot walk, making maintenance work even more difficult. However, when dealing with slopes or slippery surfaces, especially in certain areas inside nuclear power plants, such as corridors with a certain inclination angle, a large amount of mud and sand may accumulate in these places during operation, making the ground conditions harsh and increasing the difficulty of the maintenance personnel's work. In this environment, traditional work platforms are difficult to place stably and personnel movement is restricted, which not only reduces maintenance efficiency but also may increase the safety risks of workers. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a nuclear power plant corridor maintenance auxiliary device.

[0004] The technical solution adopted by the utility model to solve the technical problem is: constructing a nuclear power plant corridor maintenance auxiliary device, including a rope box and a protective rope connected to each other;

[0005] Several support and limiting mechanisms are provided at intervals on the circumferential side of the rope box, and each of the support and limiting mechanisms includes a connecting member, a fixing member, a threaded rod and a supporting member. The first end of the connecting member is connected to the circumferential side of the rope box, the first end of the fixing member is connected to the connecting member and the fixing member can be received in the connecting member, one end of the supporting member is connected to the second end of the fixing member through the threaded rod, and an anti-slip member is provided at the end of the supporting member away from the fixing member.

[0006] In some embodiments, a groove is provided on the circumferential side surface of the rope box, and the first end of the connecting member can be rotatably installed in the groove.

[0007] In some embodiments, the connecting member is columnar, and a longitudinal receiving groove is provided on one side of the connecting member, one end of the receiving groove passes through the end surface of the second end of the connecting member, and the fixing member is columnar, and the first end of the fixing member can be rotatably installed on the second end of the connecting member and the fixing member can be received in the receiving groove.

[0008] In some embodiments, the connecting member is cylindrical and has a longitudinal receiving groove, one end of which passes through the end surface of the second end of the connecting member; a plurality of first limiting holes are provided on the side surface of the connecting member, and the plurality of first limiting holes are spaced apart along the length direction of the connecting member;

[0009] The fixing member is columnar, and a plurality of second limiting holes are provided on the side of the fixing member, and the plurality of second limiting holes are spaced apart along the length direction of the fixing member;

[0010] The support and limiting mechanism further includes a plurality of limiting members, which are passed through the first limiting hole and the second limiting hole to relatively fix the connecting member and the fixing member.

[0011] In some embodiments, the limiting member includes a limiting pin.

[0012] In some embodiments, the second end of the fixing member is provided with a first connecting groove, the first end of the supporting member is provided with a second connecting groove, and the two ends of the threaded rod in the length direction are respectively used to connect the first connecting groove and the second connecting groove.

[0013] In some embodiments, the anti-slip member includes a silicone pad or a rubber pad.

[0014] In some embodiments, the rope box has a accommodating cavity, and the rope box is also provided with a rope outlet hole connected to the accommodating cavity. One end of the protective rope is fixed in the accommodating cavity, and the other end of the protective rope extends out of the accommodating cavity through the rope outlet hole.

[0015] In some embodiments, the rope box has a first end face and a second end face opposite to each other, the first end face is provided with the rope outlet hole; a mounting shaft is provided in the accommodating cavity, and one end of the protective rope is fixedly connected to the mounting shaft;

[0016] The second end surface is provided with a driving motor, and the output end of the driving motor is connected to the mounting shaft.

[0017] In some embodiments, the protection rope comprises a steel wire rope.

[0018] The implementation of the utility model has the following beneficial effects: the application of the nuclear power plant corridor maintenance auxiliary device ensures the smooth progress of the nuclear power plant corridor maintenance work. Through this device, maintenance personnel can carry out maintenance work safely and efficiently on the slope, and maintain the stability and safety of maintenance personnel even in slippery and harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 This is a schematic structural diagram of the nuclear power plant corridor maintenance auxiliary device in some embodiments of the present invention in a retracted state;

[0021] Figure 2 It is a structural schematic diagram of the nuclear power plant corridor maintenance auxiliary device in some embodiments of the present invention in another storage state;

[0022] Figure 3 This is one of the structural schematic diagrams of the nuclear power plant gallery maintenance auxiliary device in some embodiments of the present invention in a fully deployed state;

[0023] Figure 4 This is the second structural schematic diagram of the nuclear power plant corridor maintenance auxiliary device in some embodiments of the present invention in a fully deployed state;

[0024] Figure 5 It is a structural schematic diagram of the rope box in some embodiments of the present utility model;

[0025] Figure 6 It is a schematic structural diagram of the cooperation between the connecting member and the fixing member in some embodiments of the present utility model. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0027] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0029] See Figures 1 to 5 The present invention shows a nuclear power plant corridor maintenance auxiliary device, comprising a rope box 10 and a protective rope 20 connected to each other. Preferably, the rope box 10 has a accommodating cavity A, and the rope box 10 is also provided with a rope outlet B communicating with the accommodating cavity A. One end of the protective rope 20 is fixed in the accommodating cavity A, and the other end of the protective rope 20 extends out of the accommodating cavity A from the rope outlet B. The rope box 10 can be a roughly hollow columnar structure, a square columnar structure or a circular columnar structure, or the rope box 10 can be as follows. Figure 1 The cross-shaped columnar structure shown.

[0030] In some embodiments, the rope box 10 has a first end face and a second end face opposite to each other, the first end face is provided with the rope outlet hole B, the accommodating chamber A is provided with a mounting shaft 12, one end of the protective rope 20 is fixedly connected to the mounting shaft 12, for example, one end of the protective rope 20 can be bound to the mounting shaft 12, or one end of the protective rope 20 can be welded to the mounting shaft 12, the second end face is provided with a drive motor 13, the output end of the drive motor 13 is connected to the mounting shaft 12, the drive motor 13 can drive the mounting shaft 12 to rotate, and then the rope can be collected or released, and the drive motor 13 can be a servo motor, which has high precision and forward and reverse rotation functions. Preferably, the rope box 10 can be made of metal material, which includes but is not limited to stainless steel or aluminum alloy. In some embodiments, one end of the protective rope 20 can be fixed to the rope box 10, and when it needs to be stored, the protective rope 20 can be wound around the rope box 10. It can be understood that one end of the safety rope 20 has been pre-set on the top of the rope box 10 to ensure convenience and rapid deployment during use. At the same time, the rope box 10 has the function of fixing the safety rope 20.

[0031] In some embodiments, the safety rope 20 comprises a steel wire rope, and the safety rope 20 is used to be tied to the maintenance personnel, for example, around the waist of the maintenance personnel. In some embodiments, one end of the safety rope 20 may be provided with a buckle or a lock to quickly connect with a buckle or waist ring, belt, etc. on the maintenance personnel. Preferably, the length of the safety rope 20 can be 10 meters to 20 meters, for example, 10 meters, 11 meters, 12 meters, 13 meters, 14 meters, 15 meters, 16 meters, 17 meters, 18 meters, 19 meters, or 20 meters. Of course, the length of the safety rope 20 can be selected and set according to actual needs, and is not specifically limited here.

[0032] like Figures 1 to 4 As shown, a plurality of support and limiting mechanisms 30 are provided at intervals on the circumferential side of the rope box 10, and each of the support and limiting mechanisms 30 includes a connecting member 31, a fixing member 32, a threaded rod 33 and a supporting member 34. The first end of the connecting member 31 is connected to the circumferential side of the rope box 10, the first end of the fixing member 32 is connected to the connecting member 31 and the fixing member 32 can be received in the connecting member 31, and one end of the supporting member 34 is connected to the second end of the fixing member 32 through the threaded rod 33, and the end of the supporting member 34 away from the fixing member 32 is provided with an anti-slip member 35, wherein, when the limiting mechanism 30 is unfolded, the anti-slip member 35 can be fixed to the inside of the nuclear power plant corridor to avoid contact, and the maintenance personnel are connected and fixed to the protection rope 20. Afterwards, the maintenance personnel can walk and work in the nuclear power plant corridor. The protection rope 20 provides a certain traction force for the maintenance personnel, playing an auxiliary protection role.

[0033] This nuclear power plant corridor maintenance assistance device significantly improves adaptability, enabling stable operation on a variety of ground conditions and slopes, reducing safety hazards caused by harsh environments. Using the support and limit mechanism 30, maintenance personnel can adjust the height and position of the tool according to actual conditions, which not only improves maintenance efficiency but also reduces labor intensity. This nuclear power plant corridor maintenance assistance device fully considers the needs of practical applications and significantly improves the efficiency and safety of nuclear power plant corridor maintenance work by providing a flexible and stable working platform.

[0034] like Figure 4 As shown, the circumferential side of the rope box 10 is provided with a groove 11, and the first end of the connecting member 31 can be rotatably installed in the groove 11, so that the connecting member 31 can be unfolded (as shown in FIG. Figures 2 to 4 as shown) or can be stored (as Figure 1 As shown), the connecting member 31 is in the storage state, which can effectively reduce the storage space. Preferably, the rope box 10 is roughly a cross structure, which has four bosses, and each boss is provided with a groove 11.

[0035] Preferably, the connector 31 is roughly a columnar structure, such as a rectangular columnar structure. The first end of the connector 31 can be rotatably mounted in the groove 11 via a rotating shaft, or the first end of the connector 31 can be rotatably mounted in the groove 11 via a butterfly bolt, so that the connector 31 can rotate relative to the rope box 10, and can be tightened by the butterfly bolt, thereby fixing the connector 31 to the rope box 10, avoiding the situation where the connector 31 is deformed under force when the support and limiting mechanism 30 is in the expanded state (working state), thereby avoiding failure of the support and limiting mechanism 30. Of course, when the connector 31 is in the expanded state, it can also be limited by a limiting bolt, a limiting buckle or a limiting sleeve to improve safety. Of course, a suitable limiting and fixing structure can also be selected according to actual needs, and no specific limitation is made here.

[0036] like Figures 1 to 4 As shown, in some embodiments, the connecting member 31 is columnar, such as a roughly rectangular columnar structure, and a longitudinal receiving groove 311 is provided on one side of the connecting member 31. One end of the receiving groove 311 passes through the end surface of the second end of the connecting member 31 (such as Figure 3As shown), the fixing member 32 is columnar, and the first end of the fixing member 32 can be rotatably mounted on the second end of the connecting member 31 and the fixing member 32 can be received in the receiving groove 311. The first end of the fixing member 32 can be rotatably mounted in the receiving groove 311 by a butterfly bolt, so that the connecting member 31 can rotate relative to the connecting member 31, and can be tightened by the butterfly bolt, thereby fixing the fixing member 32 to the connecting member 31, avoiding the situation in which the fixing member 32 is deformed under the force when the support and limiting mechanism 30 is in the expanded state (working state), thereby avoiding the failure of the support and limiting mechanism 30. Of course, when the fixing member 32 is in the expanded state, it can also be limited by a limiting bolt, a limiting buckle or a limiting sleeve to improve safety. Of course, a suitable limiting and fixing structure can also be selected according to actual needs, and no specific limitation is made here.

[0037] like Figure 6 As shown, in other embodiments, the connecting member 31 is cylindrical, such as a rectangular cylindrical structure, and has a longitudinal receiving groove 311a. One end of the receiving groove 311a passes through the end surface of the second end of the connecting member 31. The side surface of the connecting member 31 is provided with a plurality of first limiting holes 311b, and the plurality of first limiting holes 311b are spaced apart along the length direction of the connecting member 31.

[0038] The fixing member 32 is columnar, such as a rectangular columnar structure. A plurality of second limiting holes 321 are provided on the side of the fixing member 32. The second limiting holes 321 can be opposite walls that pass through the fixing member 32. The plurality of second limiting holes 321 are spaced apart along the length direction of the fixing member 32.

[0039] The support and limiting mechanism 30 further includes a plurality of limiting members 36 . The limiting members 36 are passed through the first limiting hole 311 b and the second limiting hole 321 to relatively fix the connecting member 31 and the fixing member 32 .

[0040] Preferably, the limiting member 36 includes a limiting pin, or the limiting member 36 includes a combination of a limiting bolt and a limiting nut.

[0041] like Figure 3 As shown, the second end of the fixing member 32 is provided with a first connecting groove 322, and the first end of the support member 34 is provided with a second connecting groove 341. The two ends of the threaded rod 33 in the longitudinal direction are respectively used to connect the first connecting groove 322 and the second connecting groove 341. The threaded rod 33 is connected to the first connecting groove 322 and the second connecting groove 341, and the distance between them can be adjusted to ultimately adjust the length of the entire support and limit mechanism 30 in the deployed state, thereby adapting it to nuclear power plant corridors of different spatial dimensions. Preferably, the support member 34 has a roughly rectangular parallelepiped structure. Preferably, both the first connecting groove 322 and the second connecting groove 341 are threaded grooves.

[0042] Understandably, the threaded rod 33 is fine-tuned inside the fixing member 32 to increase the length or height of the support to adapt to different support requirements and working environments. The end of the threaded rod 33 is used to fix the mounting support member 34. The support member 34 is used to directly contact the working surface, such as a concrete support surface, to provide a stable working platform. During the adjustment process, the maintenance personnel can adjust the telescopic length of the support member 34 by rotating the threaded rod 33, so that the support height and angle of the nuclear power plant corridor maintenance auxiliary device can be finely adjusted according to the needs of the actual maintenance position. The combination of the fixing member 32, the threaded rod 33 and the support member 34 allows the maintenance personnel to quickly and accurately adjust the height and angle of the nuclear power plant corridor maintenance auxiliary device according to the needs of the actual maintenance position. The optimal position and stability are accurately set to ensure safe and effective maintenance work. By rotating the threaded rod 33, the maintenance personnel can carefully control the position of the support 34 so that it can bear the weight and provide sufficient friction under slippery conditions to ensure the smooth progress of the maintenance work, thereby improving the flexibility and adaptability of the use of the nuclear power plant corridor maintenance auxiliary device. At the same time, taking into account the safety of the maintenance personnel and the efficiency of the maintenance work, the combination of the fixing part 32, the threaded rod 33 and the support 34 ensures that the stability of the nuclear power plant corridor maintenance auxiliary device and the ease of operation can be maintained in various complex environments, thereby greatly improving the safety and work efficiency of the nuclear power plant corridor maintenance work.

[0043] In some embodiments, the anti-slip member 35 includes a silicone pad or a rubber pad to increase friction. When performing nuclear power plant corridor maintenance work, especially in inclined or harsh environments, both maintenance personnel and the nuclear power plant corridor maintenance auxiliary equipment face the risk of sliding or tipping over. The anti-slip member 35 increases friction between the supporting surface (such as a concrete floor), effectively preventing the nuclear power plant corridor maintenance auxiliary equipment from sliding, thereby providing maintenance personnel with a stable working platform. Increased friction is crucial to ensuring the safety of maintenance personnel, especially when they need to work for long periods of time on these slopes or carry heavy objects. The anti-slip member 35 has good wear resistance and grip, such as rubber or other synthetic materials, to ensure sufficient friction even in slippery environments. The anti-slip member 35 can also disperse the pressure of the support points to a certain extent, reducing damage to the maintenance corridor floor, ensuring the safety of maintenance personnel when performing maintenance tasks, and increasing the efficiency and reliability of maintenance work by improving the stability of the nuclear power plant corridor maintenance auxiliary equipment. Of course, the anti-slip member 35 can also be an anti-slip foot pad.

[0044] In some embodiments, the connecting member 31, the fixing member 32, the threaded rod 33 and the supporting member 34 are all metal parts, for example, they can be supported by stainless steel or aluminum alloy. Of course, the connecting member 31, the fixing member 32, the threaded rod 33 and the supporting member 34 can be selected and set according to actual needs, and no specific limitation is made here.

[0045] Understandably, the application of the nuclear power plant corridor maintenance auxiliary device is as follows:

[0046] Maintenance personnel can carry the nuclear power plant corridor maintenance auxiliary device to the designated maintenance location. They can extend or shorten the protection rope 20 according to actual conditions and fix the length of the protection rope 20 at the corresponding position. The support and limiting mechanism 30 is supported on the wall inside the nuclear power plant corridor. The maintenance personnel then pull out the protection rope 20 and fix it on a maintenance personnel to ensure safety when working on the slope. The several grooves 11 on the rope box 10 can be distributed on its protruding parts. A connector 31 is rotatably installed inside each groove 11. The connector 31 can be flexibly rotated to adapt to different angles and positions, thereby enhancing the safety of the nuclear power plant. The plant corridor maintenance auxiliary device has adaptability and versatility. The fixing part 32 is installed on the connecting part 31. The storage groove 311 of the connecting part 31 provides a space that is easy to carry and store, so that maintenance personnel can easily carry it to the work site. The fixing part 32, threaded rod 33 and support part 34 can be adjusted in length according to work needs to provide stable support or adjust the working angle to ensure the smooth progress of the nuclear power plant corridor maintenance work. Through this device, maintenance personnel can carry out maintenance work safely and efficiently on the slope, and maintain stability and safety of maintenance personnel even in slippery and harsh environments.

[0047] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A nuclear power plant corridor maintenance auxiliary device, characterized in that: It comprises a rope box (10) and a protective rope (20) connected to each other; The circumferential side surface of the rope box (10) is provided with a plurality of support and limiting mechanisms (30) at intervals. Each of the support and limiting mechanisms (30) includes a connecting piece (31), a fixing piece (32), a threaded rod (33) and a supporting piece (34). The first end of the connecting piece (31) is connected to the circumferential side surface of the rope box (10), the first end of the fixing piece (32) is connected to the connecting piece (31) and the fixing piece (32) can be received in the connecting piece (31), one end of the supporting piece (34) is connected to the second end of the fixing piece (32) through the threaded rod (33), and an anti-slip piece (35) is provided at one end of the supporting piece (34) away from the fixing piece (32).

2. The nuclear power plant corridor maintenance auxiliary device according to claim 1, characterized in that: A groove (11) is provided on the circumferential side surface of the rope box (10), and the first end of the connecting member (31) can be rotatably installed in the groove (11).

3. The nuclear power plant corridor maintenance auxiliary device according to claim 1, characterized in that: The connecting member (31) is columnar, and a longitudinal receiving groove (311) is provided on one side of the connecting member (31), and one end of the receiving groove (311) passes through the end surface of the second end of the connecting member (31). The fixing member (32) is columnar, and the first end of the fixing member (32) can be rotatably mounted on the second end of the connecting member (31) and the fixing member (32) can be received in the receiving groove (311).

4. The nuclear power plant corridor maintenance auxiliary device according to claim 3, characterized in that: The connecting member (31) is columnar, and has a longitudinal accommodating groove (311a), one end of which passes through the end surface of the second end of the connecting member (31); a plurality of first limiting holes (311b) are provided on the side surface of the connecting member (31), and the plurality of first limiting holes (311b) are spaced apart along the length direction of the connecting member (31); The fixing member (32) is columnar, and a plurality of second limiting holes (321) are provided on the side surface of the fixing member (32), and the plurality of second limiting holes (321) are spaced apart along the length direction of the fixing member (32); The support limiting mechanism (30) further includes a plurality of limiting members (36), wherein the limiting members (36) are passed through the first limiting hole (311b) and the second limiting hole (321) to relatively fix the connecting member (31) and the fixing member (32).

5. The nuclear power plant corridor maintenance auxiliary device according to claim 4, characterized in that: The limiting member (36) includes a limiting pin.

6. The nuclear power plant corridor maintenance auxiliary device according to any one of claims 1 to 5, characterized in that: The second end of the fixing member (32) is provided with a first connecting groove (322), the first end of the supporting member (34) is provided with a second connecting groove (341), and the two ends of the threaded rod (33) in the length direction are respectively used to connect the first connecting groove (322) and the second connecting groove (341).

7. The nuclear power plant corridor maintenance auxiliary device according to claim 1, characterized in that: The anti-slip member (35) comprises a silica gel pad or a rubber pad.

8. The nuclear power plant corridor maintenance auxiliary device according to claim 1, characterized in that: The rope box (10) has a accommodating cavity (A), and the rope box (10) is also provided with a rope outlet hole (B) communicating with the accommodating cavity (A). One end of the protection rope (20) is fixed in the accommodating cavity (A), and the other end of the protection rope (20) extends out of the accommodating cavity (A) through the rope outlet hole (B).

9. The nuclear power plant corridor maintenance auxiliary device according to claim 8, characterized in that: The rope box (10) has a first end face and a second end face opposite to each other, and the first end face is provided with the rope outlet hole (B); a mounting shaft (12) is provided in the accommodating cavity (A), and one end of the protection rope (20) is fixedly connected to the mounting shaft (12); The second end surface is provided with a driving motor (13), and the output end of the driving motor (13) is connected to the installation shaft (12).

10. The nuclear power plant corridor maintenance auxiliary device according to claim 1, characterized in that: The protection rope (20) comprises a steel wire rope.

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