Drawing tool for coupling of condensate pump of nuclear power plant

Abstract

The utility model relates to a drawing tool for a coupling of a condensate pump of a nuclear power plant, which is used for drawing the coupling to be separated from a shaft and comprises a bearing plate and a driving mechanism. The bearing plate is detachably connected with the backrest wheel in a positioning and attaching mode through at least two positioning assemblies, and an assembly hole with the two ends penetrating through is formed in the thickness direction. The driving mechanism comprises a power component and a pushing component detachably connected with the power component, the pushing component comprises a push rod used for pushing the shaft to achieve drawing of the backrest wheel, the pushing component is detachably connected with the bearing plate, the push rod is arranged in the assembling hole in a penetrating mode, and the pushing rod is detachably connected with the bearing plate. And under the driving of the power part, the rotating shaft moves back and forth parallel to the axis of the assembly hole. According to the utility model, the assembly process can be simplified, the assembly efficiency and the drawing efficiency can be improved, and meanwhile, the problems of deformation and damage caused by improper assembly of the coupling, the shaft and the drawing tool in the drawing process can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of condensate pumps in nuclear power plants, in particular to a backrest wheel drawing tool for condensate pumps in nuclear power plants. Background Art

[0002] The removal of the backrest wheel is a key step in the comprehensive disassembly and overhaul of the condensate pump motor, which directly affects the overhaul quality and progress of the pump unit. The backrest wheel of the condensate pump motor has a large diameter and heavy weight, so a crane is required to cooperate with the lifting when pulling or installing the backrest wheel.

[0003] The existing backrest wheel disassembly and assembly tool includes a lifting base plate and two tie rod bolts. The two tie rod bolts are inserted into the lifting base plate and connected to the backrest wheel for positioning. The jack is set on the lifting base plate. The tie rod bolts and the lifting base plate are locked by pulling in nuts. The backrest wheel is pulled out after applying force through the jack. However, the existing backrest wheel disassembly and assembly tool is prone to inconsistent adjustment of the two tie rods, resulting in differences in axial positioning between the lifting base plate and the backrest wheel, which is easy to cause stress deformation of the lifting base plate and reduce the service life of the pulling tool. At the same time, it takes a lot of time to adjust the positional relationship between the lifting base plate and the backrest wheel during the on-site implementation process, so as to strictly position them radially and axially, which is inefficient. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an improved nuclear power plant condensate pump backrest wheel pulling tool.

[0005] A nuclear power plant condensate pump backrest wheel pulling tool is constructed to pull the backrest wheel to be separated from the shaft, comprising:

[0006] A pressure plate is detachably positioned and fitted with the backrest wheel through at least two positioning components, and is formed with assembly holes penetrating at both ends along the thickness direction; and

[0007] The driving mechanism includes a power component and a pushing component detachably connected to the power component, the pushing component includes a push rod for pushing the shaft to realize the pulling of the backrest wheel, the pushing component is detachably connected to the pressure plate, the push rod is inserted into the assembly hole, and moves back and forth parallel to the axis of the assembly hole under the drive of the power component.

[0008] In some embodiments, the pressure plate is arranged in a cross shape, and the assembly hole is formed at the intersection center of the cross.

[0009] In some embodiments, the pressure plate includes a hub portion and four plate bodies evenly spaced around the hub portion. The plate body is in the shape of a longitudinal plate, one end of which is connected to one end of the side wall of the hub portion, and the assembly hole is formed on the hub portion.

[0010] In some embodiments, the pressure plate further includes a plurality of ribs, each of which is respectively connected to the plate body and the hub portion, and each of the plate bodies is connected to at least one of the ribs.

[0011] In some embodiments, at least two first connecting holes corresponding to the bolt holes on the backrest wheel are formed on the pressure plate, and the positioning assembly includes a positioning pad for radially positioning with the bolt hole and a positioning bolt for axial positioning, and a second connecting hole is formed on the positioning pad, and the positioning bolt is passed through the first connecting hole, the bolt hole and the second connecting hole.

[0012] In some embodiments, the positioning pad includes a plate-shaped main body and a positioning portion protruding from one side of the main body, the main body is larger than the cross-section of the bolt hole, the positioning portion is in a round cake shape, and the diameter is adapted to the hole diameter of the bolt hole.

[0013] In some embodiments, the pressure plate is arranged in a cross shape, and the number of the first connecting holes and the number of the positioning assemblies are four, and the four first connecting holes are respectively formed at the ends of the four legs of the cross of the pressure plate.

[0014] In some embodiments, the pressure plate is further formed with at least one lifting groove for connecting to a lifting device.

[0015] In some embodiments, the pressure plate is arranged in a cross shape, and the number of the lifting grooves is four, which are respectively formed on the side walls of the four legs of the cross of the pressure plate.

[0016] In some embodiments, the pushing component is a jack, and the pushing component also includes a cylinder body, the push rod is movably disposed in the cylinder body, and the front end of the cylinder body is also provided with an assembly portion for detachably connecting to the assembly hole.

[0017] The utility model has the following advantages:

[0018] The utility model provides a pressure-bearing plate detachably connected to the backrest wheel, so that the pressure-bearing plate can be arranged in surface-to-surface contact with the backrest wheel, reducing the steps of axial positioning between the two during assembly, and the positioning connection between the two reduces the steps of radial positioning between the two during assembly, simplifies the assembly process, improves assembly efficiency, and can prevent the backrest wheel, shaft and drawing tool from being deformed by force and equipment damage due to improper assembly during the drawing process;

[0019] The utility model is provided with a driving mechanism having a driving component, so that in the process of pulling, the driving component can drive the push rod to automatically lift and pull, without manual operation, thereby reducing the workload of operators and improving the pulling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 The utility model is a schematic structural diagram of a nuclear power plant condensate pump backrest wheel pulling tool in one embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods 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", "rear", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside", "inside", "outside", etc. are based on the directions or positional relationships shown in some of the drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the present technical solution, and do not indicate that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0023] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship 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 intermediate elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the 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 the specific circumstances.

[0024] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also 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 unnecessary details that hinder the description of the present invention.

[0025] Figure 1 A nuclear power plant condensate pump back wheel pulling tool 1 in one embodiment of the utility model is shown. The nuclear power plant condensate pump back wheel 2 is penetrated on the shaft 3, a through mounting hole is formed in the middle, and the shaft 3 is accommodated in the hole. The nuclear power plant condensate pump back wheel pulling tool 1 is used to realize the pulling and disengaging operation of the back wheel 2.

[0026] The nuclear power plant condensate pump backrest wheel pulling tool 1 includes a pressure plate 10 and a driving mechanism. The pressure plate 10 is detachably positioned and fitted with the backrest wheel 2, and is used as a connecting piece between the driving mechanism and the backrest wheel 2 during the pulling process, to bear the stress of both, and at the same time limit the positional relationship between the driving mechanism and the backrest wheel 2, so as to avoid the direction of the force applied by the driving mechanism during the pulling process from being deflected, resulting in damage to the backrest wheel 2 or the shaft 3. The driving mechanism is detachably arranged on the pressure plate 10, and is used to push the shaft 3 during the pulling process, thereby separating the shaft 3 from the backrest wheel 2, completing the pulling operation, without the need for manual force to pull, and without the need for manual operation of related mechanisms to pull, which can improve the efficiency of pulling the backrest wheel 2 and reduce the workload of operators.

[0027] Specifically, the pressure plate 10 is provided in a plate shape, and is detachably connected to the backrest wheel 2 by at least two positioning components 30, and the positioning components 30 are used to realize the positioning of the pressure plate 10 and the backrest wheel 2. The surface-to-surface connection between the two can also reduce the steps of axial positioning between the pressure plate 10 and the backrest wheel 2 during the assembly process, reduce the assembly process, and save assembly time. The pressure plate 10 is also formed with assembly holes 121 penetrating at both ends along the thickness direction, which are used to be detachably connected to the driving mechanism.

[0028] The driving mechanism includes a power component and a pushing component 20, wherein the power component is detachably connected to the pushing component 20. The pushing component 20 is detachably connected to the pressure plate 10, and includes a push rod 21, which is inserted into the assembly hole 121 when the pushing component 20 is connected to the pressure plate 10, and moves back and forth in a direction parallel to the axis of the assembly hole 121 under the drive of the power component, so as to push the shaft 3, thereby completing the pulling of the backrest wheel 2.

[0029] In some embodiments, the pressure plate 10 is arranged in a cross shape, and the assembly hole 121 is formed at the intersection center of the cross, so as to reduce the weight of the pressure plate 10 while ensuring positioning, thereby reducing the manufacturing cost.

[0030] In some other optional embodiments, the pressure plate 10 can also be arranged in other shapes such as circular, triangular, rectangular, irregular, etc. The arrangement position of the assembly hole 121 on the pressure plate 10 ensures that the assembly hole 121 can correspond to the position of the shaft 3, so that the push rod 22 can push the shaft 3.

[0031] Specifically, the pressure plate 10 includes a plate body 11 and a hub portion 12. The plate bodies 11 are in the shape of a longitudinal plate, and there are four of them, which are evenly spaced and arranged on the hub portion 12. The hub portion 12 is arranged in a columnar shape, and the assembly hole 121 is formed on the axis of the hub portion 12. The hub portion 12 is combined with the four plate bodies 11 to form a cross-shaped pressure plate 10 structure, and the four plate bodies 11 are the four legs of the cross-shaped pressure plate 10.

[0032] Specifically, one end of the plate body 11 is connected to one end of the side wall of the hub portion 12, so that one end face of the hub portion 12 is located on the same plane as the plate body 11, and the other end is protruding, that is, one side face of the pressure plate 10 is a plane for surface-to-surface contact with the backrest wheel 2, and the hub portion 12 on the other side is protruding for increasing the length of the assembly hole 121, extending the length of the push rod 22 in the assembly hole 121, and thereby strengthening the assembly strength with the drive mechanism.

[0033] In this embodiment, the hub portion 12 is cylindrical, and the plate body 11 is substantially rectangular.

[0034] In some other optional embodiments, the hub portion 12 may also be in a cubic shape, a semicircular shape, a polygonal column shape, an irregular shape, or other structures. The plate body 11 may be configured as a longitudinal shape with a semicircular structure at the end, an irregular shape, or other structures, which are not specifically limited here. The number of the plate bodies 11 may also be set to three, two, or more, and they may also be arranged at uneven intervals on the hub portion 12.

[0035] In some embodiments, the pressure plate 10 further includes a plurality of ribs 13. Each rib 13 is connected to the hub portion 12 and the plate body 11, respectively, and each plate body 11 is connected to at least one rib 13, thereby improving the structural rigidity of the pressure plate 10.

[0036] In this embodiment, there are eight ribs 13, and each plate body 11 corresponds to two ribs 13. Each rib 13 is arranged perpendicular to the plate body 11, and the two ribs 13 corresponding to each plate body 11 are respectively connected to the two opposite long sides of the rectangular plate body 11.

[0037] In some other optional embodiments, one or more ribs 13 may be provided on each plate body 11 , and the number of ribs 13 on each plate body 11 may be different.

[0038] In some embodiments, the pressure plate 10 also includes at least one lifting groove 112 for connecting to a lifting device, which is used to lift the nuclear power plant condensate pump back wheel pulling tool 1 through the lifting groove 112 during the process of pulling the back wheel 2, so as to solve the problem that the nuclear power plant condensate pump back wheel 2 and the nuclear power plant condensate pump back wheel pulling tool 1 matched therewith are both large in size, and the transportation process is time-consuming and labor-intensive.

[0039] Specifically, the lifting groove 112 is formed on the side wall of the plate body 11. Since the matching direction between the backrest wheel 2 and the shaft 3 is horizontal, the lifting groove 112 formed on the side wall can maintain the nuclear power plant condensate pump backrest wheel pulling tool 1 in a horizontal direction, and then the docking between the nuclear power plant condensate pump backrest wheel pulling tool 1 and the backrest wheel 2 can be achieved by adjusting the height of the lifting equipment.

[0040] In this embodiment, there are four hanging grooves 112 , which are respectively formed on four plates 11 and formed on the side walls of the ends of the plates 11 .

[0041] It should be understood that the end of the plate body 11 refers to an end of the plate body 11 away from the hub portion 12 .

[0042] In some other optional embodiments, the number of the hanging grooves 112 can also be set to one, two, three or more, and can be set only on one of the plate bodies 11 or on part of the plate bodies 11. It can also be set on the hub portion 12 or the rib plate 13. When the structure of the pressure plate 10 is other than a cross-shaped structure, the hanging groove 112 can also be formed on the side wall of any part of the pressure plate 10, or a hanging portion can be set separately, fixed to the plate body 11, the hub portion 12 or the rib plate 13, and the hanging groove 112 is formed on the hanging portion.

[0043] It should be understood that the plate body 11, the hub portion 12 and the rib plate 13 in this embodiment are all made of steel to ensure their structural strength. The three can be integrally formed or welded, which is not specifically limited here.

[0044] In some embodiments, the pushing component 20 is a jack, which further includes a cylinder 21, one end of which is open, and one end of the push rod 22 is disposed in the opening and can move back and forth along the axial direction of the cylinder 21 to push the shaft 3 and then pull the backrest wheel 2. The front end of the cylinder 21 is also provided with an assembly portion 23 for detachably connecting to the pressure plate 10.

[0045] It should be understood that the “front end” refers to the end of the cylinder 21 that is close to the backrest wheel 2 and the pressure plate 10 during use, that is, the open end, that is, the end where the push rod 22 extends.

[0046] In some embodiments, the assembly portion 23 of the push component 20 is cylindrically arranged, connected to the front end of the cylinder body 21, and coaxially arranged with the cylinder body 21, so as to facilitate the extension of the push rod 22. At the same time, the outer surface of the assembly portion 23 is also provided with a thread, and the inner wall surface of the assembly hole 121 is also provided with a thread matching therewith, and the two are detachably connected through a threaded connection.

[0047] In some other optional embodiments, the assembly portion 23 can also be set as other structures such as a plate-like structure, and the assembly portion 23 can be detachably connected to the pressure plate 10 by setting bolts. In this case, there is no need to set the assembly hole 121.

[0048] In this embodiment, the pushing component 20 is a hydraulic jack, and the driving component is a hydraulic pump. The hydraulic pump cooperates with the hydraulic jack to realize the lifting of the push rod 22, and then completes the pushing of the shaft 3, and realizes the pulling of the backrest wheel 2, so as to improve the pulling efficiency and reduce the workload of the operator.

[0049] It should be understood that the pushing component 20 and the hydraulic pump can both use existing technologies to achieve the above effects.

[0050] In some other optional embodiments, the driving component may also adopt other driving structures such as a pneumatic pump.

[0051] In some other optional embodiments, the pushing component 20 and the driving component can also be implemented by a screw-nut structure, and used in conjunction with a motor. By rotating the motor to drive the nut to rotate, the screw can be moved back and forth, thereby realizing the pushing of the shaft 3 by the screw.

[0052] In some embodiments, the positioning assembly 30 includes a positioning pad 31 and a positioning bolt 32, and several bolt holes 4 are evenly spaced in the circumference of the backrest wheel 2. Among them, the positioning pad 31 is detachably arranged in the bolt hole 4, and is used to be positioned with the bolt hole 4 in the radial direction, thereby realizing the radial positioning between the backrest wheel 2 and the pressure plate 10. At the same time, a second connecting hole 313 is formed on the positioning pad 31, which is used to penetrate the positioning bolt 32 to achieve a detachable connection with the pressure plate 10. At least two first connecting holes 111 corresponding to the bolt hole 4 are formed on the pressure plate 10, and the positioning bolt 32 is simultaneously penetrated in the first connecting hole 111, the second connecting hole 313 and the bolt hole 4, so that the backrest wheel 2 can be detachably connected to the pressure plate 10, ensuring the axial positioning of the backrest wheel 2 and the pressure plate 10.

[0053] Specifically, the positioning pad 31 includes a main body 311 and a positioning portion 312. The main body 311 is plate-shaped and is used to be clamped on the side of the bolt hole 4 of the backrest wheel 2 away from the pressure plate 10. Its size is larger than the size of the cross section of the bolt hole 4 to facilitate positioning. The positioning portion 312 is protruding from one side of the main body 311 and is in a round shape. Its diameter is compatible with the hole diameter of the bolt hole 4. When positioning with the bolt hole 4, it is protruding in the bolt hole 4 and fits with the inner wall of the bolt hole 4, thereby achieving radial positioning with the bolt hole 4.

[0054] It should be understood that, since the backrest wheel 2 of the condensate pump of the nuclear power plant is relatively large in size, and the aperture of the bolt hole 4 is also relatively large, if bolts are directly used to cooperate with the bolt hole 4, large-sized bolts will need to be customized, resulting in excessive costs. If ordinary bolts are used, it will be impossible to achieve radial positioning with the backrest wheel 2, and the equipment is easily damaged during the pulling process. The setting of the positioning pad 31 allows the positioning to be completed by directly installing it into the bolt hole 4 during the assembly process, reducing the steps of positioning and adjustment in the original installation process, simplifying the assembly steps, and making the assembly process simple and quick. At the same time, the positioning pad 31 also ensures that the connection between the backrest wheel 2 and the pressure plate 10 is evenly stressed, avoiding damage to the backrest wheel 2 during the pulling process.

[0055] In this embodiment, the main body 311 of the positioning pad 31 is also circular and is coaxially arranged with the positioning portion 312 , and the two are integrally formed. The second connecting hole 313 is formed on the axis of the main body 311 and the positioning portion 312 .

[0056] In some other optional embodiments, the main body 311 may also be a plate-like structure of other shapes such as a rectangle, a deformed shape, a triangle, or other shapes, or may be set to be semicircular, cylindrical, irregular, or other structures, as long as its cross section is larger than the cross section of the bolt hole 4, and is limited at one end of the bolt hole 4. The positioning portion 312 may also be set to be semicircular, cylindrical, cylindrical, spherical, or other shapes, as long as it can be limited in the bolt hole 4 and in the radial direction.

[0057] In some embodiments, the diameters of the first connection hole 111 and the second connection hole 313 match the diameter of the positioning bolt 32 .

[0058] In this embodiment, the number of the first connection holes 111 is four, which are respectively formed at the ends of the four plates 11. The two ribs 13 on each plate 11 are respectively arranged on both sides of the first connection hole 111. The number of the positioning components 30 is correspondingly set to four.

[0059] In some other optional embodiments, the number of the first connection holes 111 can also be set to three or two, and only set on two or three of the plate bodies 11, and the number of the positioning components 30 is adjusted accordingly. When the shape of the pressure plate 10 is set to other structures other than a cross, the number of the first connection holes 111 can be set to multiple, and the setting position on the pressure plate 10 is also flexible, as long as it can correspond to the bolt hole 4 on the backrest wheel 2, so that the backrest wheel 2 and the pressure plate 10 can be fitted face to face.

[0060] During actual use, it is only necessary to first connect the pushing component 20 to the pressure plate 10, and pass the push rod 22 through the assembly hole 121 to realize the assembly between the driving mechanism and the pressure plate 10, and then place the positioning pad 31 in the bolt hole 4 of the backrest wheel 2.

[0061] Furthermore, the connection end of the lifting device is arranged in the lifting groove 112 , and the pressure plate 10 and the driving mechanism are lifted by the lifting device and lifted to a position close to the backrest wheel 2 .

[0062] Furthermore, the pressure plate 10 is lifted to a height corresponding to the first connecting hole 111 and the bolt hole 4, and the positioning bolts 32 are respectively inserted into the first connecting hole 111, the bolt hole 4 and the second connecting hole 313, and tightened with nuts to achieve the assembly of the pressure plate 10 and the backrest wheel 2.

[0063] Furthermore, the driving component is connected to the pushing component 20, and the driving component is started, so that the push rod 22 moves axially outward, and then pushes the corresponding shaft 3, so that the shaft 3 moves along the axis of the backrest wheel 2 in the direction away from the nuclear power plant condensate pump backrest wheel pulling tool 1, that is, the shaft 3 and the backrest wheel 2 move relative to each other axially until the backrest wheel 2 and the shaft 3 are separated from each other, and the pulling is completed.

[0064] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A nuclear power plant condensate pump backrest wheel pulling tool, used for pulling a backrest wheel (2) to be separated from a shaft (3), characterized in that: include: The pressure plate (10) is detachably positioned and fitted with the backrest wheel (2) via at least two positioning components (30), and is formed with assembly holes (121) penetrating at both ends along the thickness direction; and The driving mechanism comprises a power component and a pushing component (20) detachably connected to the power component, wherein the pushing component (20) comprises a push rod (22) for pushing the shaft (3) to realize pulling of the backrest wheel (2), the pushing component (20) is detachably connected to the pressure plate (10), the push rod (22) is inserted into the assembly hole (121), and moves back and forth parallel to the axis of the assembly hole (121) under the drive of the power component.

2. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 1, characterized in that: The pressure bearing plate (10) is arranged in a cross shape, and the assembly hole (121) is formed at the intersection center of the cross.

3. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 2, characterized in that: The pressure plate (10) comprises a hub portion (12) and four plate bodies (11) evenly spaced and arranged in the circumferential direction of the hub portion (12); the plate body (11) is in the shape of a longitudinally long plate, one end of which is connected to one end of the side wall of the hub portion (12); and the assembly hole (121) is formed on the hub portion (12).

4. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 3, characterized in that: The pressure-bearing plate (10) further comprises a plurality of rib plates (13), each of the rib plates (13) being respectively connected to the plate body (11) and the hub portion (12), and each of the plate bodies (11) is connected to at least one of the rib plates (13).

5. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 1, characterized in that: At least two first connecting holes (111) are formed on the pressure plate (10) and correspond to the bolt holes (4) on the backrest wheel (2). The positioning assembly (30) comprises a positioning pad (31) for positioning with the bolt hole (4) in the radial direction and a positioning bolt (32) for positioning in the axial direction. A second connecting hole (313) is formed on the positioning pad (31). The positioning bolt (32) is inserted into the first connecting hole (111), the bolt hole (4) and the second connecting hole (313).

6. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 5, characterized in that: The positioning pad (31) comprises a plate-shaped main body (311) and a positioning portion (312) protruding from one side of the main body (311); the size of the main body (311) is larger than the size of the cross section of the bolt hole (4); the positioning portion (312) is in the shape of a round pancake, and its diameter matches the hole diameter of the bolt hole (4).

7. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 5, characterized in that: The pressure plate (10) is arranged in a cross shape, the number of the first connection holes (111) and the number of the positioning components (30) are both four, and the four first connection holes (111) are respectively formed at the ends of the four legs of the cross of the pressure plate (10).

8. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 1, characterized in that: The pressure bearing plate (10) is also formed with at least one lifting groove (112) for connecting to lifting equipment.

9. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 8, characterized in that: The pressure-bearing plate (10) is arranged in a cross shape, and the number of the hanging grooves (112) is four, which are respectively formed on the side walls of the four legs of the cross of the pressure-bearing plate (10).

10. The nuclear power plant condensate pump backrest wheel pulling tool according to claim 1, characterized in that: The pushing component (20) is a jack, and the pushing component (20) further comprises a cylinder body (21), the push rod (22) is movably arranged in the cylinder body (21), and the front end of the cylinder body (21) is also provided with an assembly part (23) for detachably connecting with the assembly hole (121).

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