Nuclear power plant steam generator plug drawing tool installation device

Abstract

The utility model discloses a nuclear power plant steam generator plug drawing tool mounting device, including long rod subassembly and with long rod subassembly one end connection's support subassembly, support subassembly includes installation base and positioning base, and the one end of installation base away from long rod subassembly is equipped with the positioning groove, and the one end of positioning base is rotatably installed in the positioning groove, and the upper surface of installation base still is equipped with the step part for limiting positioning base in the support position, and support subassembly still includes with positioning base connection is used for the first bearing station of installing unicuspid seat, and support subassembly still includes with positioning base connection is used for the second bearing station of installing nuclear power plant steam generator plug drawing tool. Application this device, and the staff can not need to go to the nuclear power plant evaporator, and the installation operation of nuclear power plant steam generator plug drawing tool can be carried out, and the situation of foreign matter into the nuclear power plant steam generator can be reduced or avoided, and the health of staff can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, and in particular to an installation device for a plug pulling tool for a nuclear power plant steam generator. Background Technology

[0002] Using roll-expansion plugs to seal both ends of defective heat transfer tubes is an essential maintenance method to ensure the integrity of the pressure boundary of the primary loop in a nuclear power plant steam generator. If abnormalities such as improper plug installation occur, the plugs must be removed without damaging the heat transfer tubes and tube sheet surfaces to allow for re-plugging and other maintenance operations.

[0003] Traditional plug removal and installation tools typically require workers to move the equipment from the manhole of the nuclear power plant's steam generator to the water chamber before installation and fixation. Workers entering the steam generator are prone to bringing in foreign objects, and working inside the steam generator also poses a risk of contamination from nuclear pollutants and radiation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an installation device for a plug pulling tool for a nuclear power plant steam generator, so as to solve the problems of foreign objects and personnel health caused by manual installation of the pulling tool in related technologies.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a nuclear power plant steam generator plug pulling tool installation device, including a long rod assembly and a support assembly connected to one end of the long rod assembly; The support assembly includes a mounting base and a positioning base. The mounting base has a positioning groove at one end away from the long rod assembly, and one end of the positioning base is rotatably mounted in the positioning groove. The upper surface of the mounting base also has a stepped portion for limiting the positioning base in the support position. The support assembly also includes a first bearing platform connected to the positioning base for mounting a single-toe seat, and a second bearing platform connected to the positioning base for mounting a nuclear power plant steam generator plug pulling tool.

[0006] In some embodiments, the positioning groove extends through the upper and lower surfaces of the mounting base, and the positioning groove has a U-shaped structure; One end of the positioning base is provided with a connecting part, which is rotatably mounted in the positioning groove via a rotating shaft.

[0007] In some embodiments, a portion of the stepped portion projected onto the mounting base is located within the projection of the positioning groove.

[0008] In some embodiments, the first support platform is connected to the side of the positioning base, and the positioning base is provided with a positioning hole that mates with the single-toe seat; The first support platform is also provided with through holes that penetrate its upper and lower surfaces.

[0009] In some embodiments, the second support platform includes a first support portion and a second support portion, one end of the first support portion is connected to the upper surface of the positioning base, and one end of the second support portion is connected to the upper surface of the end of the first support portion away from the positioning base. The second bearing part is provided with several connection holes for connecting with the plug pulling tool of the nuclear power plant steam generator.

[0010] In some embodiments, the long rod assembly includes a plurality of connecting rods and a plurality of connecting cylinders, wherein two axially adjacent connecting rods are connected through the connecting cylinders, and the first connecting rod is connected to the mounting base.

[0011] In some embodiments, the connecting cylinder is an axially through-structure at both ends, and the connecting cylinder is provided with a plurality of limiting holes that penetrate its inner and outer walls, and the plurality of limiting holes are provided at intervals along the axial direction of the connecting cylinder. The long rod assembly also includes a fastener, one end of which passes through the limiting hole and abuts against the outer surface of the connecting rod.

[0012] In some embodiments, the outer wall surface of the connecting rod is further provided with a limiting groove, and one end of the fastener passes through the limiting hole and abuts against the limiting groove to fasten the connecting cylinder and the connecting rod.

[0013] In some embodiments, the last connecting rod or the last connecting cylinder is provided with an anti-slip structure.

[0014] In some embodiments, the lower surface of the positioning base is provided with a pull ring, and at least one of the connecting rods or at least one of the connecting cylinders is provided with a sliding seat, the sliding seat being provided with a pulley; The nuclear power plant steam generator plug pulling tool installation device also includes a pull rope, one end of which is fixedly connected to the pull ring, and the other end of which passes around the middle pulley of the single-toe seat and the pulley on the sliding seat.

[0015] The present invention offers the following advantages: By using this nuclear power plant steam generator plug pulling tool installation device, workers can install the plugs without entering the evaporator, reducing or preventing foreign objects from entering the steam generator and minimizing or preventing workers from being contaminated by radioactive contaminants inside the generator, thus protecting their health. Furthermore, the device is easy to operate and highly practical. Attached Figure Description

[0016] 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: Figure 1 This is one of the structural schematic diagrams of the nuclear power plant steam generator plug pulling tool installation device in some embodiments of this utility model; Figure 2 This is the second schematic diagram of the installation device for the plug pulling tool of the nuclear power plant steam generator in some embodiments of this utility model; Figure 3 This is one of the partial structural schematic diagrams of the nuclear power plant steam generator plug pulling tool installation device in some embodiments of this utility model; Figure 4 This is the second partial structural schematic diagram of the nuclear power plant steam generator plug pulling tool installation device in some embodiments of this utility model; Figure 5 This is a simplified illustration of the application of the nuclear power plant steam generator plug pulling tool installation device in some embodiments of this utility model. Detailed Implementation

[0017] 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.

[0018] 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 "first," "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 "first," "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.

[0019] 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.

[0020] Please see Figures 1 to 5 This utility model discloses an installation device for a plug pulling tool for a nuclear power plant steam generator, including a long rod assembly 10 and a support assembly 20 connected to one end of the long rod assembly 10.

[0021] The support assembly 20 includes a mounting base 21 and a positioning base 22. The mounting base 21 has a positioning groove 211 at one end away from the long rod assembly 10. One end of the positioning base 22 is rotatably mounted in the positioning groove 211. The upper surface of the mounting base 21 also has a step portion 23 for limiting the positioning base 22 in the support position. The support assembly 20 also includes a first support platform 24 connected to the positioning base 22 for mounting the single-toe seat 100. The support assembly 20 also includes a second support platform 25 connected to the positioning base 22 for mounting the nuclear power plant steam generator plug pulling tool 200.

[0022] By using this nuclear power plant steam generator plug removal tool installation device, workers can perform the installation work without entering the nuclear power plant evaporator. This reduces or prevents foreign objects from entering the steam generator and minimizes or prevents workers from being contaminated by radioactive contaminants inside the steam generator, thus protecting their health. Furthermore, the device is easy to operate and highly practical.

[0023] See Figure 3 and Figure 4 In some embodiments, the positioning groove 211 extends through the upper and lower surfaces of the mounting base 21, and the positioning groove 211 has a U-shaped structure. One end of the positioning base 22 is provided with a connecting portion 221, which is rotatably mounted to the positioning groove 211 via a rotating shaft 222. The rotating shaft 222 can have relatively high damping, allowing the positioning base 22 to remain relatively fixed to the mounting base 21 without any tension, preventing relative rotation between the two.

[0024] See Figure 3 and Figure 4 In some embodiments, the portion of the stepped portion 23 projected onto the mounting base 21 is located within the projection of the positioning groove 211. Preferably, the portion of the stepped portion 23 projected onto the mounting base 21 overlaps with the portion of the connecting portion 221 projected onto the mounting base 21, such that when the connecting portion 221 rotates to the support position, the end of the connecting portion 221 abuts against the end of the stepped portion 23, and the positioning base 22 can no longer rotate. The support position is such that the plane of the positioning base 22 is approximately perpendicular to the plane of the mounting base 21.

[0025] See Figure 3 and Figure 4 In some embodiments, the first support platform 24 is connected to the side of the positioning base 22, and the positioning base 22 is provided with a positioning hole 241 that cooperates with the single toe seat 100. The single toe seat 100 can be fixed relative to the positioning hole 241 by an air inflator.

[0026] See Figure 3 and Figure 4 In some embodiments, the first support platform 24 is also provided with through holes 242 extending through its upper and lower surfaces, so that the first support platform 24 has a certain rigidity while reducing its weight and improving its portability.

[0027] See Figure 3 and Figure 4In some embodiments, the second support platform 25 includes a first support portion 251 and a second support portion 252. One end of the first support portion 251 is connected to the upper surface of the positioning base 22, and one end of the second support portion 252 is connected to the upper surface of the end of the first support portion 251 away from the positioning base 22. The extending direction of the first support portion 251 is opposite to the extending direction of the first support platform 24. The first support portion 251 may be fixed to the upper surface of the positioning base 22 by fastening bolts or the like, and the second support portion 252 may be fixed to the first support portion 251 by fastening bolts or the like. Alternatively, the second support platform 25 may be an integral structure. The second support portion 252 is provided with a plurality of connecting holes 2521 for connecting to the nuclear power plant steam generator plug pulling tool 200. The air expansion component of the nuclear power plant steam generator plug pulling tool 200 is fixed relative to the connecting holes 2521.

[0028] See Figure 3 and Figure 4 In some embodiments, the long rod assembly 10 includes a plurality of connecting rods 11 and a plurality of connecting cylinders 12. Two axially adjacent connecting rods 11 are connected through the connecting cylinders 12, wherein the first connecting rod 11 is connected to the mounting base 21. In some embodiments, the connecting cylinder 12 has an axially through-hole structure at both ends, and the connecting cylinder 12 is provided with a plurality of limiting holes 121 penetrating its inner and outer walls. The plurality of limiting holes 121 extend at intervals along the axial direction of the connecting cylinder 12. The long rod assembly 10 also includes fasteners, one end of which passes through the limiting hole 121 and abuts against the outer surface of the connecting rod 11. The fasteners include, but are not limited to, fastening screws or fastening bolts. The number and length of the connecting rods 11 can be selected according to actual needs, and the overall length of the device can be increased by assembly, thereby improving its practicality.

[0029] In some embodiments, the outer wall surface of the connecting rod 11 is further provided with a limiting groove, and one end of the fastener passes through the limiting hole 121 and abuts against the limiting groove to fasten the connecting cylinder 12 and the connecting rod 11, thereby improving the connection stability between the two. The limiting groove can be a through groove or a non-through groove.

[0030] In some embodiments, the last connecting rod 11 or the last connecting cylinder 12 is provided with an anti-slip structure 13, which may include, but is not limited to, an anti-slip sleeve, a protrusion, or a texture, to improve the anti-slip effect. Here, "the last connecting rod 11 or the last connecting cylinder 12" refers to the connecting rod 11 or connecting cylinder 12 that is away from the support assembly 20.

[0031] See Figures 1 to 5In some embodiments, the lower surface of the positioning base 22 is provided with a pull ring 26, and at least one of the connecting rods 11 or at least one of the connecting cylinders 12 is provided with a sliding seat 14. The sliding seat 14 is located near the support assembly 20 and is provided with a pulley 141. The nuclear power plant steam generator plug pulling tool installation device also includes a pull rope 17. One end of the pull rope 17 is fixedly connected to the pull ring 26, and the other end of the pull rope 17 passes around the intermediate pulley 101 of the single-toe seat 100 and the pulley 141 on the sliding seat 14.

[0032] See Figure 1 In some embodiments, at least one of the connecting rods 11 or at least one of the connecting cylinders 12 is provided with a first fixed seat 142, and the sliding seat 14 is detachably mounted on the first fixed seat 142.

[0033] In this application, the single-toe seat 100 can be first loaded into the water chamber of the steam generator. After the single-toe seat 100 is connected and fixed to the tube sheet of the nuclear power plant evaporator, the nuclear power plant steam generator plug pulling tool 200 is installed on the second support platform 25. When the nuclear power plant steam generator plug pulling tool 200 reaches the vicinity of the tube sheet where the plug needs to be pulled out, the positioning base 22 is rotated by the pull rope 17, with the help of the force-saving action of the intermediate pulley 101 and pulley 141, so that the nuclear power plant steam generator plug pulling tool 200 is deflected and adjusted to be parallel to the row, column or straight line direction of the heat transfer tube (if appropriate). Then the nuclear power plant steam generator plug pulling tool 200 is lifted, and then the nuclear power plant steam generator plug pulling tool 200 performs the plug pulling operation.

[0034] See Figures 1 to 5 In some embodiments, at least one of the connecting rods 11 or at least one of the connecting cylinders 12 is provided with a rope pressing seat 15, which is disposed on the side away from the support assembly 20, and the rope pressing seat 15 is provided with a rope pressing pulley 151; one end of the pull rope 17 is fixedly connected to the pull ring 26, and the other end of the pull rope 17 passes around the intermediate pulley 101 of the single-toe seat 100 and the pulley 141 on the sliding seat 14, and passes through the rope pressing pulley 151. Of course, in some embodiments, the rope pressing seat 15 may also be provided with a rope hole instead of the rope pressing pulley 151.

[0035] See Figure 1 In some embodiments, at least one of the connecting rods 11 or at least one of the connecting cylinders 12 is provided with a second fixing seat 152, and the rope pressing seat 15 is detachably installed on the second fixing seat 152.

[0036] In some embodiments, the surfaces of the long rod assembly 10 and the support assembly 20 are anodized, which makes them rust-proof and easy to clean, and suitable for use in the water chamber of a steam generator.

[0037] In some embodiments, the components of the long rod assembly 10 and the support assembly 20 are made of aluminum alloy, and the total weight is ≤15kg.

[0038] In this application, both the single-toe seat 100 and the nuclear power plant steam generator plug pulling tool 200 are mature existing technologies, and will not be described in detail here.

[0039] 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 installing a plug puller in a nuclear power plant steam generator, characterized in that, It includes a long rod assembly (10) and a support assembly (20) connected to one end of the long rod assembly (10). The support assembly (20) includes a mounting base (21) and a positioning base (22). The mounting base (21) has a positioning groove (211) at one end away from the long rod assembly (10). One end of the positioning base (22) is rotatably mounted in the positioning groove (211). The upper surface of the mounting base (21) is also provided with a step (23) for limiting the positioning base (22) in the support position. The support assembly (20) also includes a first bearing platform (24) connected to the positioning base (22) for mounting a single-toe seat (100). The support assembly (20) also includes a second bearing platform (25) connected to the positioning base (22) for mounting a nuclear power plant steam generator plug puller (200).

2. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 1, characterized in that, The positioning groove (211) extends through the upper and lower surfaces of the mounting base (21), and the positioning groove (211) has a U-shaped structure. One end of the positioning base (22) is provided with a connecting part (221), and the connecting part (221) is rotatably mounted on the positioning groove (211) via a rotating shaft (222).

3. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 1, characterized in that, The portion of the stepped portion (23) projected onto the mounting base (21) is located within the projection of the positioning groove (211).

4. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 1, characterized in that, The first support platform (24) is connected to the side of the positioning base (22), and the positioning base (22) is provided with a positioning hole (241) that cooperates with the single toe seat (100). The first support platform (24) is also provided with through holes (242) that penetrate its upper and lower surfaces.

5. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 1, characterized in that, The second support platform (25) includes a first support part (251) and a second support part (252). One end of the first support part (251) is connected to the upper surface of the positioning base (22), and one end of the second support part (252) is connected to the upper surface of the end of the first support part (251) away from the positioning base (22). The second support part (252) is provided with a plurality of connection holes (2521) for connecting with the plug pulling tool (200) of the nuclear power plant steam generator.

6. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 1, characterized in that, The long rod assembly (10) includes several connecting rods (11) and several connecting cylinders (12). Two axially adjacent connecting rods (11) are connected through the connecting cylinders (12), wherein the first connecting rod (11) is connected to the mounting base (21).

7. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 6, characterized in that, The connecting cylinder (12) is an axial through-structure. The connecting cylinder (12) is provided with a plurality of limiting holes (121) that penetrate its inner and outer walls. The plurality of limiting holes (121) are provided at intervals along the axial direction of the connecting cylinder (12). The long rod assembly (10) also includes a fastener, one end of which passes through the limiting hole (121) and abuts against the outer surface of the connecting rod (11).

8. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 7, characterized in that, The outer wall of the connecting rod (11) is also provided with a limiting groove. One end of the fastener passes through the limiting hole (121) and abuts against the limiting groove to fasten the connecting cylinder (12) and the connecting rod (11).

9. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 7, characterized in that, The last connecting rod (11) or the last connecting cylinder (12) is provided with an anti-slip structure (13).

10. The installation device for pulling out plugs of nuclear power plant steam generators according to claim 7, characterized in that, The lower surface of the positioning base (22) is provided with a pull ring (26), and at least one of the connecting rods (11) or at least one of the connecting cylinders (12) is provided with a sliding seat (14), and the sliding seat (14) is provided with a pulley (141). The nuclear power plant steam generator plug puller installation device also includes a pull rope (17), one end of which is fixedly connected to the pull ring (26), and the other end of which passes around the intermediate pulley (101) of the single toe seat (100) and the pulley (141) on the sliding seat (14).

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