Bending device for external oil shield copper bar of bearing box of steam turbine of nuclear power plant

Abstract

The utility model discloses a nuclear power plant steam turbine bearing box outer oil shield copper bar bending device which comprises an installation frame, a first sliding plate, a second sliding plate, a first adjusting piece, a second adjusting piece, a first roller, a second roller and a third roller. The mounting frame comprises a bottom plate, a first side plate and a second side plate; the first adjusting piece is connected with the first sliding plate for adjusting the height of the first sliding plate, and the second adjusting piece is connected with the second sliding plate for adjusting the height of the second sliding plate; a plurality of first grooves are formed in the first roller, a plurality of second grooves are formed in the second roller, a plurality of third grooves are formed in the third roller, the third roller is matched with the first roller and the second roller, and one end of the third roller is connected with an operating part. The device realizes on-site replacement work of the oil shield copper bar outside the bearing box of the steam turbine of the nuclear power plant, fills the blank of on-site maintenance work, and effectively saves the maintenance cost and the maintenance period.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, and in particular to a device for bending copper strips on the outer oil baffle of a turbine bearing housing in a nuclear power plant. Background Technology

[0002] Nuclear power plant turbine bearing housings are designed with external oil baffles to prevent lubricating oil from leaking out of the bearing housing and causing oil leakage.

[0003] During unit overhauls, the bearing housing requires inspection and maintenance each time, necessitating the removal of the lower outer oil baffle. Repeated disassembly, reassembly, and repositioning of the outer oil baffle frequently results in the copper strip of the outer oil baffle being damaged and deformed. Regular replacement of the copper strip is required, but due to the lack of on-site annealing (to soften the copper strip) and arc-quenching equipment, on-site replacement of the outer oil baffle copper strip is impossible, necessitating return to the factory for repair. This causes numerous inconveniences to the entire maintenance work, leading to low maintenance efficiency, forced extension of the maintenance period, and increased maintenance time and costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a bending device for the copper strip of the outer oil baffle of the turbine bearing housing in nuclear power plants, so as to solve the problem that the copper strip of the outer oil baffle of the bearing housing needs to be returned to the factory for repair, resulting in high maintenance time and maintenance cost.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a bending device for the copper strip of the outer oil baffle of the turbine bearing housing in a nuclear power plant, including a mounting frame, a first sliding plate, a second sliding plate, a first adjusting component, a second adjusting component, a first roller, a second roller, and a third roller;

[0006] The mounting frame includes a base plate, a first side plate, and a second side plate. The first side plate and the second side plate are perpendicularly connected to both ends of the base plate, respectively. The first side plate has a first sliding groove, in which the first sliding plate is movably installed. The second side plate has a second sliding groove, in which the second sliding plate is movably installed. A first adjusting member is connected to the first sliding plate to adjust the height of the first sliding plate, and a second adjusting member is connected to the second sliding plate to adjust the height of the second sliding plate.

[0007] The first roller has several first grooves, the second roller has several second grooves, and the third roller has several third grooves. The two ends of the first roller are respectively connected to the first side plate and the second side plate, and the two ends of the second roller are respectively connected to the first side plate and the second side plate. The first roller and the second roller are horizontally spaced apart. The two ends of the third roller are respectively connected to the first slide plate and the second slide plate. The third roller cooperates with the first roller and the second roller, and one end of the third roller is connected to an operating component.

[0008] In some embodiments, the base plate has a rectangular plate structure, the first side plate is perpendicularly connected to a first end of the base plate in the length direction, and the second side plate is perpendicularly connected to a second end of the base plate in the length direction.

[0009] In some embodiments, a first limiting groove and a second limiting groove are respectively provided on opposite sides of the inner sidewall of the first slide groove, the first slide plate includes a first plate-shaped body, and a first protrusion and a second protrusion are respectively provided at both ends of the first plate-shaped body, the first protrusion is installed in the first limiting groove, and the second protrusion is installed in the second limiting groove; the first plate-shaped body is also provided with a first threaded hole.

[0010] The mounting bracket also includes a first limiting plate, which is mounted on the upper side of the first side plate, and the first limiting plate is provided with a second threaded hole;

[0011] The first adjusting member includes a first screw, which passes through the second threaded hole and is connected to the first threaded hole.

[0012] In some embodiments, a third limiting groove and a fourth limiting groove are respectively provided on opposite sides of the inner sidewall of the second slide groove, the second slide plate includes a second plate-shaped body, and a third protrusion and a fourth protrusion are respectively provided at both ends of the second plate-shaped body, the third protrusion is installed in the third limiting groove, and the fourth protrusion is installed in the fourth limiting groove; the second plate-shaped body is also provided with a third threaded hole;

[0013] The mounting bracket also includes a second limiting plate, which is mounted on the upper side of the second side plate, and the second limiting plate is provided with a fourth threaded hole;

[0014] The second adjusting member includes a second screw, which passes through the third threaded hole and is connected to the fourth threaded hole.

[0015] In some embodiments, the third roller is located between the first roller and the second roller, and the line connecting the axes of the first roller, the second roller and the third roller is triangular in shape.

[0016] In some embodiments, a plurality of the first grooves are spaced apart along the axis of the first roller, a plurality of the second grooves are spaced apart along the axis of the second roller, and a plurality of the third grooves are spaced apart along the axis of the third roller.

[0017] In some embodiments, the width of the first groove is 1.5mm, 2mm, 2.5mm or 3mm;

[0018] The width of the second groove is 1.5mm, 2mm, 2.5mm or 3mm;

[0019] The width of the third groove is 1.5mm, 2mm, 2.5mm or 3mm.

[0020] In some embodiments, the depths of the first groove, the second groove, and the second groove are 4.8mm-5.2mm.

[0021] In some embodiments, the surface roughness of the first roller, the second roller, and the third roller is Ra3.2.

[0022] In some embodiments, the mounting bracket, the first roller, the second roller, and the third roller are all made of Q235 steel.

[0023] The following are the beneficial effects of implementing this utility model: The bending device for the copper strips of the outer oil baffle of the nuclear power plant turbine bearing housing has a relatively simple structure and high practicality. It can realize the bending operation of the copper strips of the outer oil baffle of the nuclear power plant turbine bearing housing on site. It is easy to operate, requires less skill from nuclear power plant personnel, and has a high safety factor. This bending device for the copper strips of the outer oil baffle of the nuclear power plant turbine bearing housing enables the replacement of the copper strips of the outer oil baffle of the nuclear power plant turbine bearing housing on site, filling the gap in this maintenance work on site, and effectively saving maintenance costs and maintenance time. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the present 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 some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0025] Figure 1 This is one of the structural schematic diagrams of the copper strip bending device for the outer oil baffle of the turbine bearing housing in a nuclear power plant, according to some embodiments of this utility model;

[0026] Figure 2 This is the second schematic diagram of the structure of the copper strip bending device for the outer oil baffle of the turbine bearing housing in a nuclear power plant, according to some embodiments of this utility model.

[0027] Figure 3 This is the third schematic diagram of the structure of the copper strip bending device for the outer oil baffle of the turbine bearing housing in a nuclear power plant, according to some embodiments of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the first sliding plate and the first side plate cooperating in some embodiments of this utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the second sliding plate and the second side plate in some embodiments of this utility model. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0031] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0033] See Figures 1 to 5 This utility model discloses a bending device for the copper strip of the outer oil baffle of the turbine bearing housing in a nuclear power plant, which can be used for bending and arc pressing operations of the copper strip of the outer oil baffle of the turbine bearing housing in a nuclear power plant.

[0034] The device for bending copper strips on the outer oil baffle of the turbine bearing housing in the nuclear power plant includes a mounting frame 10, a first sliding plate 20, a second sliding plate 30, a first adjusting component 40, a second adjusting component 50, a first roller 60, a second roller 70, and a third roller 80.

[0035] The mounting bracket 10 includes a base plate 11, a first side plate 12, and a second side plate 13. The first side plate 12 and the second side plate 13 are respectively perpendicularly connected to both ends of the base plate 11. The first side plate 12 is provided with a first sliding groove 121, and the first sliding plate 20 is movably installed in the first sliding groove 121. The second side plate 13 is provided with a second sliding groove 131, and the second sliding plate 30 is movably installed in the second sliding groove 131. The first adjusting member 40 is connected to the first sliding plate 20 for adjusting the height of the first sliding plate 20, and the second adjusting member 50 is connected to the second sliding plate 30 for adjusting the height of the second sliding plate 30.

[0036] The first roller 60 is provided with a plurality of first grooves 61, the second roller 70 is provided with a plurality of second grooves 71, and the third roller 80 is provided with a plurality of third grooves 81. The two ends of the first roller 60 are respectively connected to the first side plate 12 and the second side plate 13, and the two ends of the second roller 70 are respectively connected to the first side plate 12 and the second side plate 13. The first roller 60 and the second roller 70 are horizontally spaced apart. The two ends of the third roller 80 are respectively connected to the first slide plate 20 and the second slide plate 30. The third roller 80 cooperates with the first roller 60 and the second roller 70, and one end of the third roller 80 is connected to an operating member 90.

[0037] In this process, when bending the copper strip of the outer oil baffle of a nuclear power plant turbine bearing housing is required, the copper strip to be bent is passed through the corresponding first groove 61, second groove 71, and third groove 81. Then, the contact gap between the third roller 80 and the first roller 60 and second roller 70 is adjusted, and the third roller 80 is rotated via the operating component 90, thereby bending the copper strip of the outer oil baffle of the nuclear power plant turbine bearing housing. This bending device for the outer oil baffle of a nuclear power plant turbine bearing housing has a relatively simple structure, high practicality, and can realize the bending operation of the outer oil baffle of a nuclear power plant turbine bearing housing on-site. It is easy to operate, requires less skill from nuclear power plant personnel, and has a high safety factor.

[0038] In some embodiments, the base plate 11 has a rectangular plate structure, the first side plate 12 is perpendicularly connected to a first end of the base plate 11 in the length direction, and the second side plate 13 is perpendicularly connected to a second end of the base plate 11 in the length direction. The base plate 11, the first side plate 12, and the second side plate 13 may be an integral structure.

[0039] like Figure 4As shown, in some embodiments, the inner sidewall of the first slide groove 121 is provided with a first limiting groove 122 and a second limiting groove 123 on opposite sides. The first slide plate 20 includes a first plate-shaped body 21. The two ends of the first plate-shaped body 21 are provided with a first protrusion 22 and a second protrusion 23, respectively. The first protrusion 22 is installed in the first limiting groove 122, and the second protrusion 23 is installed in the second limiting groove 123. The first plate-shaped body 21 is also provided with a first threaded hole 211.

[0040] The mounting bracket 10 also includes a first limiting plate 14, which is mounted on the upper side of the first side plate 12. The first limiting plate 14 has a second threaded hole. The first limiting plate 14 can be detachably connected to the upper side of the first side plate 12, for example, it can be fixed by a threaded connection. The first slide plate 20 can be installed into the first slide groove 121 first, and then the first limiting plate 14 can be fixed.

[0041] The first adjusting member 40 includes a first screw, which passes through the second threaded hole and is connected to the first threaded hole 211.

[0042] Specifically, by rotating the first screw clockwise or counterclockwise with the axis of the first screw as a reference, the first screw can be operated to move downward or upward along the height direction, which in turn drives the first slide plate 20 to move downward or upward along the height direction, similar to a lead screw drive.

[0043] See Figure 5 In some embodiments, the inner sidewall of the second slide groove 131 is provided with a third limiting groove 132 and a fourth limiting groove 133 on opposite sides. The second slide plate 30 includes a second plate-shaped body 31. The two ends of the second plate-shaped body 31 are provided with a third protrusion 32 and a fourth protrusion 33, respectively. The third protrusion 32 is installed in the third limiting groove 132, and the fourth protrusion 33 is installed in the fourth limiting groove 133. The second plate-shaped body 31 is also provided with a third threaded hole 311.

[0044] The mounting bracket 10 also includes a second limiting plate 15, which is mounted on the upper side of the second side plate 13. The second limiting plate 15 has a fourth threaded hole. The second limiting plate 15 can be detachably connected to the upper side of the second side plate 13, for example, it can be fixed by a threaded connection. The second sliding plate 30 can be installed into the second sliding groove 131 first, and then the second limiting plate 15 can be fixed.

[0045] The second adjusting member 50 includes a second screw, which passes through the third threaded hole 311 and is connected to the fourth threaded hole.

[0046] Specifically, by rotating the second screw clockwise or counterclockwise with the axis of the second screw as a reference, the second screw can be operated to move downward or upward along the height direction. At this time, the second slide plate 30 can be driven to move downward or upward along the height direction, similar to a lead screw drive.

[0047] See Figure 2 In some embodiments, the third roller 80 is located between the first roller 60 and the second roller 70, and the line connecting the axes of the first roller 60, the second roller 70 and the third roller 80 is triangular in shape, such as an equilateral triangle. In some embodiments, the shaft ends of the first roller 60, the second roller 70 and the third roller 80 may be provided with bearings, such as ball bearings.

[0048] In some embodiments, a plurality of the first grooves 61 are spaced apart along the axis of the first roller 60, a plurality of the second grooves 71 are spaced apart along the axis of the second roller 70, and a plurality of the third grooves 81 are spaced apart along the axis of the third roller 80.

[0049] In some embodiments, the width of the first groove 61 is 1.5mm, 2mm, 2.5mm or 3mm. On the same first roller 60, there may be at least one first groove 61 with a width of 1.5mm, at least one first groove 61 with a width of 2mm, at least one first groove 61 with a width of 2.5mm or at least one first groove 61 with a width of 3mm.

[0050] The width of the second groove 71 is 1.5mm, 2mm, 2.5mm or 3mm; on the same second roller 70, there may be at least one second groove 71 with a width of 1.5mm, at least one second groove 71 with a width of 2mm, at least one second groove 71 with a width of 2.5mm or at least one second groove 71 with a width of 3mm.

[0051] The width of the third groove 81 is 1.5mm, 2mm, 2.5mm, or 3mm. On the same third roller 80, there may be at least one third groove 81 with a width of 1.5mm, at least one third groove 81 with a width of 2mm, at least one third groove 81 with a width of 2.5mm, and at least one third groove 81 with a width of 3mm.

[0052] In some embodiments, the depths of the first groove 61, the second groove 71, and the second groove 71 are 4.8mm-5.2mm, such as 4.8mm, 4.9mm, 5.0mm, 5.1mm, or 5.2mm. Preferably, the depth of the first groove 61, the second groove 71, and the second groove 71 is 5.0mm. Of course, the depth and width of the first groove 61, the second groove 71, and the second groove 71 can be selected and set according to actual needs, and are not specifically limited here.

[0053] In some embodiments, the surface roughness of the first roller 60, the second roller 70 and the third roller 80 is Ra3.2.

[0054] In some embodiments, the mounting bracket 10, the first roller 60, the second roller 70, and the third roller 80 are all made of Q235 steel. Of course, the mounting bracket 10, the first roller 60, the second roller 70, and the third roller 80 can also be made of other materials, such as 316L stainless steel, to better suit the environment of a nuclear power plant near the coast.

[0055] In some embodiments, the operating element 90 includes an operating handle, which may be a crank. Of course, in other embodiments, the operating element 90 may be an electric torque wrench connected to one end of the shaft of the third roller 80 for torque transmission. Understandably, the bending device for the copper strip of the external oil baffle of the nuclear power plant turbine bearing housing can be manually operated or electrically operated.

[0056] The application of the copper strip bending device for the outer oil baffle of the nuclear power plant turbine bearing housing is as follows: First, the annealed copper strip is filed flat. Then, the first adjusting component 40 and the second adjusting component 50 are operated simultaneously to move the third roller 80 up and down until the gap between it and the lower first roller 60 and second roller 70 is just enough to fit the straight copper strip of the outer oil baffle of the nuclear power plant turbine bearing housing into the corresponding groove. Then, the operating component 90 is operated repeatedly in both directions, while the first adjusting component 40 and the second adjusting component 50 are adjusted, so that the third roller 80 gradually moves towards the lower first roller 60 and second roller 70. In this way, the copper strip of the outer oil baffle of the nuclear power plant turbine bearing housing will gradually bend during the repeated movement between the first roller 60, the second roller 70 and the third roller 80 until the shape of the copper strip meets the standard.

[0057] The device for bending copper strips on the outer oil baffle of the turbine bearing housing in nuclear power plants enables the replacement of copper strips on the outer oil baffle of the turbine bearing housing in nuclear power plants on-site, filling a gap in this maintenance work and effectively saving maintenance costs and time.

[0058] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A device for bending an oil shield copper bar outside a bearing box of a turbine shaft of a nuclear power plant, characterized in that, The mounting frame, the first sliding plate, the second sliding plate, the first adjusting member, the second adjusting member, the first roller, the second roller and the third roller are arranged in the mounting frame. The mounting frame comprises a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are respectively connected with two ends of the bottom plate perpendicularly, the first side plate is provided with a first sliding groove, the first sliding plate is movably arranged in the first sliding groove, the second side plate is provided with a second sliding groove, and the second sliding plate is movably arranged in the second sliding groove; the first adjusting member is connected with the first sliding plate for adjusting the height of the first sliding plate, and the second adjusting member is connected with the second sliding plate for adjusting the height of the second sliding plate. The first roller is provided with a plurality of first grooves, the second roller is provided with a plurality of second grooves, the third roller is provided with a plurality of third grooves, two ends of the first roller are respectively connected with the first side plate and the second side plate, two ends of the second roller are respectively connected with the first side plate and the second side plate, the first roller and the second roller are arranged horizontally and spaced apart, two ends of the third roller are respectively connected with the first sliding plate and the second sliding plate, the third roller cooperates with the first roller and the second roller, and one end of the third roller is connected with an operating member.

2. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device according to claim 1, characterized in that, The bottom plate is in a rectangular plate structure, the first side plate is connected with the first end of the length direction of the bottom plate perpendicularly, and the second side plate is connected with the second end of the length direction of the bottom plate perpendicularly.

3. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The opposite sides of the inner side wall of the first sliding groove are respectively provided with a first limiting groove and a second limiting groove, the first sliding plate comprises a first plate-shaped main body, two ends of the first plate-shaped main body are respectively provided with a first protruding part and a second protruding part, the first protruding part is arranged in the first limiting groove, and the second protruding part is arranged in the second limiting groove; the first plate-shaped main body is further provided with a first threaded hole; The mounting frame further comprises a first limiting plate, the first limiting plate is arranged on the upper side of the first side plate, and the first limiting plate is provided with a second threaded hole; The first adjusting member comprises a first screw rod, the first screw rod is arranged in the second threaded hole and connected with the first threaded hole.

4. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The opposite sides of the inner side wall of the second sliding groove are respectively provided with a third limiting groove and a fourth limiting groove, the second sliding plate comprises a second plate-shaped main body, two ends of the second plate-shaped main body are respectively provided with a third protruding part and a fourth protruding part, the third protruding part is arranged in the third limiting groove, and the fourth protruding part is arranged in the fourth limiting groove; the second plate-shaped main body is further provided with a third threaded hole; The mounting frame further comprises a second limiting plate, the second limiting plate is arranged on the upper side of the second side plate, and the second limiting plate is provided with a fourth threaded hole; The second adjusting member comprises a second screw rod, the second screw rod is arranged in the third threaded hole and connected with the fourth threaded hole.

5. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The third roller is located between the first roller and the second roller, and the connecting line of the axes of the first roller, the second roller and the third roller is in a triangular shape.

6. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, A plurality of the first grooves are arranged along an axis of the first roller, a plurality of the second grooves are arranged along an axis of the second roller, and a plurality of the third grooves are arranged along an axis of the third roller.

7. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The first groove has a width of 1.5 mm, 2 mm, 2.5 mm, or 3 mm. The second groove has a width of 1.5 mm, 2 mm, 2.5 mm, or 3 mm. The third groove has a width of 1.5 mm, 2 mm, 2.5 mm, or 3 mm.

8. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The first groove, the second groove, and the third groove have a depth of 4.8 mm-5.2 mm.

9. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The first roller, the second roller, and the third roller have a surface roughness of Ra3.

2.

10. The nuclear power plant turbine bearing box outer oil barrier copper bar bending device of claim 1, wherein, The mounting frame, the first roller, the second roller, and the third roller are made of Q235 steel.

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