Unit refueling pump maintenance device and nuclear power plant maintenance equipment

Abstract

This utility model provides a unit charging pump maintenance device and nuclear power plant maintenance equipment. The unit charging pump maintenance device includes: a main lifting beam, a first lifting plate located on the upper side of the main lifting beam, a second lifting plate located on the upper side of the main lifting beam and opposite to the first lifting plate, a sliding lifting beam located on the lower side of the main lifting beam, a lifting mechanism located on the sliding lifting beam, and a drive mechanism located on the sliding lifting beam and pulsatorically connected to the lifting mechanism. The first and second lifting plates are respectively used to connect to the motor bracket holes of the charging pump, and the relative positions of the first and second lifting plates on the main lifting beam are adjustable. The sliding lifting beam can move along the length of the main lifting beam. The drive mechanism can drive the lifting mechanism to lift the components of the charging pump. By adopting the above technical solution, the risk of equipment damage caused by lifting the entire motor is reduced, safety risks are lowered, maintenance efficiency is improved, and the maintenance period is shortened.

Description

Technical Field

[0001] This utility model relates to the technical field of nuclear power plant maintenance equipment, and more specifically, to a unit charging pump maintenance device and nuclear power plant maintenance equipment. Background Technology

[0002] Due to pump system, bearing, mechanical seal failure, or program requirements, it is necessary to overhaul the bearings and mechanical seals of the charging pump in an EPR (Evolutionary Power Reactor) unit. Existing overhaul procedures have the following drawbacks:

[0003] High risk of equipment damage: When overhauling the bearings and mechanical seals in the charging pump, it is necessary to lift out components such as the motor, air cooler, motor junction box, and motor bracket to obtain maintenance space. Lifting the motor is a high-risk operation, and due to the limited space on site, the motor may collide with the wall, causing damage to the motor.

[0004] High industrial safety risks: Before hoisting the motor of the charging pump, the concrete cover plate on top of the motor needs to be opened and a solid fence erected, making the hoisting operation an edge-to-edge job. Furthermore, due to limitations in the hoisting hole and room height, the motor cannot be vertically hoisted out of the hoisting hole and then turned over; it must be turned over while being hoisted over the floor slab. This process may result in interference from unhooking fasteners and slings, posing a high hoisting risk. In addition, because the motor junction box is located high up, scaffolding must be erected for disassembly, making it a high-altitude operation with a risk of falling objects.

[0005] The work involves multiple interfaces: First, a permit for removing the sealant from the cement cover plate is required, after which service personnel will remove the sealant. Next, a permit for erecting a junction box and dismantling scaffolding is needed, followed by the dismantling of the scaffolding after the junction box is removed. Then, a permit for lifting the cement cover plate is required, after which service personnel will assist in erecting a physical fence. A permit for removing the instrumentation probe is also needed. With so many interfaces, the overall management ability of the person in charge is crucial.

[0006] The original maintenance process had a long lead time: due to the involvement of many departments and the complexity of the process, it took 2 days to hoist the motor of the charging pump and 2 days to reinstall the motor. In addition, the hoisting of the motor would add 1 day to the alignment of the pump unit. Welding and flaw detection of related pipelines would take 2 days, resulting in an increase of about 7 days in the overall lead time. With the continuous optimization of the EPR unit overhaul period, the original maintenance process could no longer meet the actual needs.

[0007] In summary, the existing process for overhauling the charging pumps of generating units presents technical challenges, including a high risk of equipment damage, significant safety risks, and a long maintenance period. Utility Model Content

[0008] The purpose of this utility model is to provide a unit charging pump maintenance device and nuclear power plant maintenance equipment to solve the technical problems of high equipment damage risk, high safety risk and long maintenance period caused by hoisting during the maintenance of unit charging pumps in the prior art.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] Firstly, a device for overhauling a generator unit's charging pump is provided, comprising:

[0011] The system comprises a main lifting beam, a first lifting plate located on the upper side of the main lifting beam, a second lifting plate located on the upper side of the main lifting beam and opposite to the first lifting plate, a sliding lifting beam located on the lower side of the main lifting beam, a lifting mechanism located on the sliding lifting beam, and a drive mechanism located on the sliding lifting beam and pulsatorically connected to the lifting mechanism; wherein the main lifting beam is used to pass through the opening of the motor bracket of the charging pump, the first and second lifting plates are respectively used to connect to the holes of the motor bracket of the charging pump, and the relative positions of the first and second lifting plates on the main lifting beam are adjustable; the sliding lifting beam is capable of moving along the length direction of the main lifting beam; and the drive mechanism is used to drive the lifting mechanism to lift the internal components of the charging pump.

[0012] By adopting the above technical solution, it is not necessary to lift the entire motor when overhauling the charging pump. The maintenance work can be completed simply by moving the mechanical seal and bearing device out of the motor bracket. This reduces the risk of equipment damage caused by lifting the entire motor, lowers safety risks, improves maintenance efficiency, and shortens the maintenance period.

[0013] In one embodiment, the main lifting beam includes a first main lifting beam segment, a second main lifting beam segment, and a third main lifting beam segment connected in sequence. The first main lifting beam segment is provided with a first lifting plate, the second main lifting beam segment is provided with a clearance opening for avoiding the components of the charging pump, and the third main lifting beam segment is provided with a second lifting plate. The second lifting plate can move closer to or away from the first lifting plate along the length direction of the third main lifting beam segment.

[0014] In one embodiment, the third main lifting beam section is provided with a sliding guide rail, the sliding beam is slidably connected to the sliding guide rail, and the sliding beam can slide along the length direction of the sliding guide rail.

[0015] In one embodiment, the drive mechanism is located at one end of the sliding beam, and the other end of the sliding beam is provided with a third lifting plate. The lifting mechanism is provided on the third lifting plate, and in the lifting direction of the lifting mechanism, the size of the third lifting plate is smaller than the size of the sliding beam.

[0016] In one embodiment, the third lifting plate is provided with a first pulley, and a drive rope is connected between the lifting mechanism and the driving mechanism, the drive rope being wound around the first pulley.

[0017] In one embodiment, the sliding beam is provided with a second pulley, a third pulley, and a fourth pulley in sequence along its own length direction, and the drive rope is wound around the second pulley, the third pulley, and the fourth pulley in sequence.

[0018] In one embodiment, the drive mechanism includes a winch disposed on the sliding beam and a handle coaxially disposed with the winch. The drive rope is wound around the winch, and the handle is used to drive the winch to rotate around the axis to wind up and unwind the drive rope.

[0019] In one embodiment, the lifting mechanism includes a suspension structure connected to the drive rope, wherein the size of the suspension structure is smaller than the size of the sliding beam in the lifting direction of the lifting mechanism.

[0020] In one embodiment, the first hanging plate includes a first plate body disposed on the main hanging beam and a first fixing column disposed on the first plate body, and the second hanging plate includes a second plate body disposed on the main hanging beam and a second fixing column disposed on the second plate body, wherein both the first fixing column and the second fixing column are used to connect to the motor bracket hole.

[0021] Secondly, a nuclear power plant maintenance equipment is provided, comprising a main body of the nuclear power plant maintenance equipment and the aforementioned unit charging pump maintenance device, wherein the unit charging pump maintenance device is connected to the main body of the nuclear power plant maintenance equipment.

[0022] By adopting the above technical solution, based on the advantages of the unit charging pump maintenance device of the above embodiment, the nuclear power plant maintenance equipment of this embodiment also has the advantages of high maintenance efficiency and short maintenance period. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the use of the unit charging pump maintenance device provided in this embodiment of the utility model.

[0025] Figure 2 This is a three-dimensional structural diagram of the motor bracket provided in an embodiment of this utility model.

[0026] Figure 3 This is a three-dimensional structural diagram of the unit charging pump maintenance device provided in this embodiment of the utility model.

[0027] Figure 4 This is a three-dimensional structural diagram of the main lifting beam provided in an embodiment of this utility model.

[0028] Figure 5 This is a three-dimensional structural diagram of the sliding lifting beam provided in an embodiment of this utility model.

[0029] Figure 6 This is a front view of the unit charging pump maintenance device provided in this embodiment of the utility model.

[0030] The labels for the attached figures are as follows:

[0031] 100. Unit charging pump maintenance device; 200. Motor bracket; 201. Motor bracket hole; 202. Opening;

[0032] 1. Main lifting beam; 2. First lifting platform; 3. Second lifting platform; 4. Sliding lifting beam; 5. Lifting mechanism; 6. Drive mechanism; 7. Third lifting platform;

[0033] 11. First main lifting beam section; 12. Second main lifting beam section; 13. Third main lifting beam section; 71. First pulley; 70. Drive rope; 72. Second pulley; 73. Third pulley; 74. Fourth pulley; 61. Winch; 62. Handle; 51. Suspension structure; 52. Hanger; 21. First plate; 22. First fixed column; 31. Second plate; 32. Second fixed column;

[0034] 121. Avoidance opening; 131. Sliding guide rail. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be located directly on or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0037] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or the number of technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. The specific implementation of this utility model is described in more detail below with reference to specific embodiments:

[0039] like Figures 1 to 3 As shown in the illustration, this utility model provides a unit charging pump maintenance device 100 for maintaining units in nuclear power plants. For example, the unit charging pump maintenance device 100 of this embodiment can be used to maintain the EPR unit charging pump, enabling the replacement of mechanical seals and bearing devices without lifting the motor. This reduces the possibility of unit damage caused by motor lifting, improving safety and maintenance efficiency. The following detailed description illustrates the specific implementation:

[0040] The unit charging pump maintenance device 100 in this embodiment includes:

[0041] The system comprises a main lifting beam 1, a first lifting plate 2 located on the upper side of the main lifting beam 1, a second lifting plate 3 located on the upper side of the main lifting beam 1 and opposite to the first lifting plate 2, a sliding lifting beam 4 located on the lower side of the main lifting beam 1, a lifting mechanism 5 located on the sliding lifting beam 4, and a drive mechanism 6 located on the sliding lifting beam 4 and connected to the lifting mechanism 5. The main lifting beam 1 is used to pass through the opening 202 of the motor bracket 200 of the charging pump. The first lifting plate 2 and the second lifting plate 3 are respectively used to connect to the motor bracket hole 201 of the charging pump. The relative positions of the first lifting plate 2 and the second lifting plate 3 on the main lifting beam 1 are adjustable. The sliding lifting beam 4 can move along the length of the main lifting beam 1. The drive mechanism 6 is used to drive the lifting mechanism 5 to lift the internal components of the charging pump.

[0042] Specifically, the main lifting beam 1 is connected to the motor bracket hole 201 of the unit's charging pump via the first lifting plate 2 and the second lifting plate 3, ensuring that the entire lifting weight is borne by the motor bracket 200. The main lifting beam 1 has a preset length, which is greater than the width of the motor bracket 200, so that the first lifting plate 2 and the second lifting plate 3 can clamp and fix the motor bracket 200.

[0043] The first hanging plate 2 refers to a plate-shaped component used to connect to one side of the motor bracket 200; the first hanging plate 2 is located on the upper side of the main hanging beam 1, and the upper side of the main hanging beam 1 refers to the upper side in the vertical direction when the main hanging beam 1 is fixed to the motor bracket 200.

[0044] The second hanging plate 3 refers to a plate-shaped component used to connect to the other side of the motor bracket 200. The second hanging plate 3 is also located on the upper side of the main hanging beam 1. The second hanging plate 3 is arranged opposite to the first hanging plate 2, so that there is a preset space between the second hanging plate 3 and the first hanging plate 2, so that the motor bracket 200 can be accommodated in the preset space, which facilitates the second hanging plate 3 and the first hanging plate 2 to be fixed on the motor bracket 200. The relative position of the second hanging plate 3 and the first hanging plate 2 on the main hanging beam 1 is adjustable. That is, the preset space reserved between them can be adjusted according to the motor bracket 200 of different sizes, so that the second hanging plate 3 and the first hanging plate 2 can be fixed on the motor bracket 200 of different sizes.

[0045] The sliding lifting beam 4 refers to the lifting beam component used to adjust the position of the lifting mechanism 5 relative to the main lifting beam 1. The sliding lifting beam 4 is slidably installed on the lower side of the main lifting beam 1, and is located on the upper and lower sides of the main lifting beam 1, respectively, along with the first lifting plate 2 and the second lifting plate 3. The sliding lifting beam 4 can move along the length of the main lifting beam 1, which can drive the lifting mechanism 5 to move to the target position, facilitating the connection between the lifting mechanism 5 and the component to be lifted.

[0046] The lifting mechanism 5 refers to components used to lift the charging pump on the unit, such as mechanical seals or bearing devices.

[0047] The drive mechanism 6 refers to the power mechanism used to drive the lifting components of the lifting mechanism 5.

[0048] The working principle of the unit charging pump maintenance device 100 provided in this embodiment is as follows:

[0049] The unit charging pump maintenance device 100 of this embodiment is used to maintain the unit charging pump. The unit charging pump includes a motor bracket 200 and a mechanical seal and bearing device disposed on the motor bracket 200. The motor bracket 200 is a vertical design, and the mechanical seal and bearing device are fixed inside the motor bracket 200. By adjusting the distance between the first lifting plate 2 and the second lifting plate 3, the first lifting plate 2 and the second lifting plate 3 can be clamped and fixed on the motor bracket 200. The main lifting beam 1 extends into the interior of the motor bracket 200 through the opening 202. By adjusting the position of the sliding lifting beam 4 on the main lifting beam 1, the lifting mechanism 5 can extend into the interior of the motor bracket 200 and be aligned with and connected to the component to be lifted. The drive mechanism 6 drives the lifting mechanism 5 to lift the component, realizing the vertical displacement of the component. At the same time, the sliding lifting beam 4 can realize the horizontal displacement of the component. In this way, the component to be maintained can be disassembled and moved out of the motor bracket 200 without lifting the motor bracket 200, thereby realizing the maintenance work.

[0050] By adopting the above technical solution, it is not necessary to lift the entire motor when overhauling the charging pump. The mechanical seal and bearing device only need to be moved 200 meters away from the motor bracket to complete the overhaul. This reduces the risk of equipment damage caused by lifting the entire motor, lowers safety risks, improves maintenance efficiency, and shortens the maintenance period.

[0051] like Figure 4 As shown, in one embodiment, the main lifting beam 1 includes a first main lifting beam section 11, a second main lifting beam section 12, and a third main lifting beam section 13 connected in sequence. The first main lifting beam section 11 is provided with a first lifting plate 2. The second main lifting beam section 12 is provided with a clearance opening 121 for avoiding components of the charging pump. The third main lifting beam section 13 is provided with a second lifting plate 3. The second lifting plate 3 can move closer to or away from the first lifting plate 2 along the length direction of the third main lifting beam section 13.

[0052] Specifically, the main lifting beam 1 includes multiple main lifting beam segments, wherein the first main lifting beam segment 11, the second main lifting beam segment 12, and the third main lifting beam segment 13 are connected sequentially to form the main lifting beam 1. The first main lifting beam segment 11 is a component used to set the first lifting plate 2; the second main lifting beam segment 12 is a component used to set the clearance opening 121 for the charging pump component. Since the component to be inspected in the charging pump is located inside the motor bracket 200, the main lifting beam 1 needs to clear the component to be inspected in the motor bracket 200 when lifting the component to be inspected. Therefore, the clearance opening 121 is set in the second main lifting beam segment 12; the third main lifting beam segment 13 is a component used to set the second lifting plate 3.

[0053] By adopting the above technical solution, it is beneficial to install the main lifting beam 1 inside the motor bracket 200.

[0054] In one embodiment, the third main lifting beam section 13 is provided with a sliding guide rail 131, and the sliding lifting beam 4 is slidably connected to the sliding guide rail 131, and the sliding lifting beam 4 can slide along the length direction of the sliding guide rail 131.

[0055] Specifically, the sliding guide rail 131 includes, but is not limited to, the groove structure of the third main lifting beam section 13, and the sliding lifting beam 4 is provided with pulleys that are slidably connected in the groove structure.

[0056] By adopting the above technical solution, the sliding beam 4 was made to slide on the main beam 1.

[0057] like Figure 5 As shown, in one embodiment, the drive mechanism 6 is located at one end of the sliding beam 4, and the other end of the sliding beam 4 is provided with a third lifting plate 7. The third lifting plate 7 is provided with a lifting mechanism 5. In the lifting direction of the lifting mechanism 5, the size of the third lifting plate 7 is smaller than the size of the sliding beam 4.

[0058] Specifically, the third lifting plate 7 refers to the lifting plate component used to support the lifting mechanism 5; the third lifting plate 7 is set on the end of the sliding lifting beam 4 away from the drive mechanism 6; in order to reduce the space occupied by the lifting mechanism 5, the third lifting plate 7 is set as a smaller lifting plate, which reduces the size of the third lifting plate 7 in the lifting direction, so that the lifting mechanism 5 can extend into the motor bracket 200, reduce the occupation of vertical space by tools, and facilitate the lifting operation of the parts to be lifted.

[0059] By adopting the above technical solution and using a specially sized third lifting plate 7, the operating space occupied by the third lifting plate 7 is reduced, making it easier to lift the parts to be lifted.

[0060] like Figure 6 As shown, in one embodiment, the third lifting plate 7 is provided with a first pulley 71, and a drive rope 70 is connected between the lifting mechanism 5 and the drive mechanism 6. The drive rope 70 is wound around the first pulley 71.

[0061] Specifically, the cooperation between the first pulley 71 and the drive rope 70 makes the power output direction of the drive mechanism 6 adjustable, which is beneficial for the lifting mechanism 5 to lift the part to be lifted in the vertical direction.

[0062] By adopting the above technical solution, the power output of the drive mechanism 6 is improved.

[0063] In one embodiment, the sliding beam 4 is provided with a second pulley 72, a third pulley 73 and a fourth pulley 74 in sequence along its own length direction, and the drive rope 70 is wound around the second pulley 72, the third pulley 73 and the fourth pulley 74 in sequence.

[0064] Specifically, the second pulley 72, the third pulley 73, and the fourth pulley 74 enable the drive rope 70 to adapt to the extension direction of the sliding beam 4, reducing the possibility of the drive rope 70 being exposed and improving safety.

[0065] In one embodiment, the drive mechanism 6 includes a winch 61 disposed on the sliding beam 4 and a handle 62 coaxially disposed with the winch 61. The drive rope 70 is wound around the winch 61, and the handle 62 is used to drive the winch 61 to rotate around the axis to retract and extend the drive rope 70.

[0066] Specifically, the operator can crank the handle 62 to drive the winch 61 to rotate around the shaft, thereby raising and lowering the drive rope 70.

[0067] In one embodiment, the lifting mechanism 5 includes a suspension structure 51 connected to the drive rope 70, and the size of the suspension structure 51 is smaller than the size of the sliding beam 4 in the lifting direction of the lifting mechanism 5.

[0068] The suspension structure 51 can be selected as a hanging point structure, which refers to the connection between the suspended object and the object being lifted during lifting operations.

[0069] By adopting the above technical solution, it is beneficial for the lifting mechanism 5 to extend into the interior of the motor bracket 200.

[0070] In one embodiment, the lifting mechanism 5 further includes a hanger 52 for connection to the bearing housing.

[0071] Please refer to it again. Figure 3 In one embodiment, the first hanging plate 2 includes a first plate body 21 disposed on the main hanging beam 1 and a first fixing column 22 disposed on the first plate body 21, and the second hanging plate 3 includes a second plate body 31 disposed on the main hanging beam 1 and a second fixing column 32 disposed on the second plate body 31. The first fixing column 22 and the second fixing column 32 are both used to connect to the motor bracket hole 201.

[0072] Specifically, the motor bracket hole 201 is a threaded hole, and the first fixing post 22 and the second fixing post 32 are threadedly connected to the motor bracket hole 201.

[0073] Secondly, a nuclear power plant maintenance equipment is provided, comprising a main body of the nuclear power plant maintenance equipment and the aforementioned unit charging pump maintenance device 100, wherein the unit charging pump maintenance device 100 is connected to the main body of the nuclear power plant maintenance equipment.

[0074] By adopting the above technical solution, based on the advantages of the unit charging pump maintenance device 100 in the above embodiment, the nuclear power plant maintenance equipment in this embodiment also has the advantages of high maintenance efficiency and short maintenance period.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for overhauling a unit's charging pump, characterized in that, include: The system comprises a main lifting beam, a first lifting plate located on the upper side of the main lifting beam, a second lifting plate located on the upper side of the main lifting beam and opposite to the first lifting plate, a sliding lifting beam located on the lower side of the main lifting beam, a lifting mechanism located on the sliding lifting beam, and a drive mechanism located on the sliding lifting beam and pulsatorically connected to the lifting mechanism; wherein the main lifting beam is used to pass through the opening of the motor bracket of the charging pump, the first and second lifting plates are respectively used to connect to the holes of the motor bracket of the charging pump, and the relative positions of the first and second lifting plates on the main lifting beam are adjustable; the sliding lifting beam is capable of moving along the length direction of the main lifting beam; and the drive mechanism is used to drive the lifting mechanism to lift the internal components of the charging pump.

2. The unit charging pump maintenance device as described in claim 1, characterized in that, The main lifting beam includes a first main lifting beam section, a second main lifting beam section, and a third main lifting beam section connected in sequence. The first main lifting beam section is provided with a first lifting plate. The second main lifting beam section is provided with a clearance opening for avoiding the components of the charging pump. The third main lifting beam section is provided with a second lifting plate. The second lifting plate can move closer to or away from the first lifting plate along the length direction of the third main lifting beam section.

3. The unit charging pump maintenance device as described in claim 2, characterized in that, The third main lifting beam section is equipped with a sliding guide rail, and the sliding lifting beam is slidably connected to the sliding guide rail, allowing the sliding lifting beam to slide along the length direction of the sliding guide rail.

4. The unit charging pump maintenance device as described in claim 3, characterized in that, The drive mechanism is located at one end of the sliding beam, and the other end of the sliding beam is provided with a third lifting plate. The lifting mechanism is provided on the third lifting plate. In the lifting direction of the lifting mechanism, the size of the third lifting plate is smaller than the size of the sliding beam.

5. The unit charging pump maintenance device as described in claim 4, characterized in that, The third lifting plate is equipped with a first pulley, and a drive rope is connected between the lifting mechanism and the driving mechanism. The drive rope is wound around the first pulley.

6. The unit charging pump maintenance device as described in claim 5, characterized in that, The sliding beam is provided with a second pulley, a third pulley, and a fourth pulley in sequence along its own length direction, and the drive rope is wound around the second pulley, the third pulley, and the fourth pulley in sequence.

7. The unit charging pump maintenance device as described in claim 5, characterized in that, The drive mechanism includes a winch mounted on the sliding beam and a handle coaxially mounted on the winch. The drive rope is wound around the winch, and the handle is used to drive the winch to rotate around the axis to wind up and unwind the drive rope.

8. The unit charging pump maintenance device as described in claim 5, characterized in that, The lifting mechanism includes a suspension structure connected to the drive rope, and in the lifting direction of the lifting mechanism, the size of the suspension structure is smaller than the size of the sliding beam.

9. The unit charging pump maintenance device as described in any one of claims 1 to 8, characterized in that, The first hanging plate includes a first plate body disposed on the main hanging beam and a first fixing column disposed on the first plate body. The second hanging plate includes a second plate body disposed on the main hanging beam and a second fixing column disposed on the second plate body. Both the first fixing column and the second fixing column are used to connect with the motor bracket hole.

10. A nuclear power plant maintenance equipment, characterized in that, The package includes the main body of the nuclear power plant maintenance equipment and the unit charging pump maintenance device according to any one of claims 1 to 9, wherein the unit charging pump maintenance device is connected to the main body of the nuclear power plant maintenance equipment.

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