A thread hole thread repair chaser

Abstract

The utility model discloses a kind of thread hole thread repair chaser, comprising: mounting sleeve, provide installation foundation;Centering guide sleeve, movable sleeve is connected on mounting sleeve;Driving assembly is connected with the first end of mounting sleeve, to drive mounting sleeve relative centering guide sleeve moves;Tool rest, the second end fixed connection of mounting sleeve moves along with mounting sleeve, tool rest is equipped with axial mounting hole;Several blades, along the radial direction of mounting sleeve and tool rest sliding connection, and the radial direction both ends of each blade is respectively exposed in tool rest outside and axial mounting hole inside;Lead screw adjusting assembly, axial penetration mounting sleeve, and with mounting sleeve fixed connection;Positioning assembly, with the free end of lead screw adjusting assembly fixed connection and follow lead screw adjusting assembly moves;Positioning assembly is set to gradually change outer diameter, always connect with several blades to adjust the radial position of blade.The utility model is used to repair damaged thread of the thread hole of reactor pressure vessel, improve repair efficiency and repair effect.

Description

Technical Field

[0001] This utility model relates to the field of thread repair technology, and in particular to a thread repair comb for threaded holes. Background Technology

[0002] During nuclear power plant maintenance, collisions occasionally occur during the disassembly of reactor pressure vessel studs, causing varying degrees of damage to the threads. Currently, manual repair is the primary method for addressing thread damage. However, manual repair is ineffective, time-consuming, and carries the risk of radiation exposure to workers, potentially causing harm. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a thread repair comb for threaded holes.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a thread repair comb for threaded holes, comprising:

[0005] Install the sleeve to provide the mounting base;

[0006] A centering guide sleeve is movably fitted onto the mounting sleeve;

[0007] A drive assembly is connected to the first end of the mounting sleeve to drive the mounting sleeve to move relative to the centering guide sleeve;

[0008] A tool holder is fixedly connected to the second end of the mounting sleeve to move with the mounting sleeve, and the tool holder is provided with an axial mounting hole;

[0009] Several blades are slidably connected to the tool holder along the radial direction of the mounting sleeve, and the radial ends of each blade are exposed on the outside of the tool holder and in the axial mounting hole, respectively.

[0010] The lead screw adjustment assembly extends axially through the mounting sleeve and is fixedly connected to the mounting sleeve;

[0011] A positioning component is fixedly connected to the free end of the lead screw adjusting component and moves with the lead screw adjusting component; the positioning component is configured with a gradually changing outer diameter and is always connected to a plurality of the blades to adjust the radial position of the blades.

[0012] In some embodiments, the drive assembly includes a connector and at least one drive member, the connector being fixedly connected to the mounting sleeve, and the drive member being fixedly connected to the connector to drive the connector to rotate.

[0013] In some embodiments, the tool holder includes a tool holder body and an end cap, the end cap being detachably connected to the tool holder body;

[0014] The blade holder body is provided with several radial mounting holes, and the blade is inserted into the radial mounting holes and abuts against the end cap.

[0015] In some embodiments, the positioning component includes a cone and a cone sleeve. The cone is fixedly connected to the free end of the lead screw adjusting component and abuts against the inner sidewall of the blade. The cone sleeve is fitted onto the cone and inserted into and limited by the blade.

[0016] In some embodiments, the inner wall of the blade is inclined, and the cone abuts against the inner wall to restrict the inward movement of the blade;

[0017] The blade is provided with an inclined positioning groove, and the tapered sleeve includes a plurality of inclined contact portions, each of which abuts against the positioning groove to restrict the outward movement of the blade.

[0018] In some embodiments, the lead screw adjusting assembly includes a connecting rod and a first adjusting nut, the first adjusting nut being rotatably connected to the mounting sleeve and screwed to the connecting rod.

[0019] In some embodiments, the lead screw adjusting assembly further includes a second adjusting nut, which is rotatably connected to the first adjusting nut;

[0020] The connecting rod includes a first threaded section and a second threaded section that are in contact with each other, and the first threaded section and the second threaded section have different pitches.

[0021] The first adjusting nut is screwed to the first threaded section, and the second adjusting nut is screwed to the second threaded section.

[0022] In some embodiments, the drive element is a handle or a ratchet torque wrench.

[0023] In some embodiments, the mounting sleeve has graduations on its outer side along its axial direction.

[0024] In some embodiments, a lifting ring is also included, which is fixedly connected to the drive assembly.

[0025] By implementing this utility model, the following beneficial effects can be achieved:

[0026] This utility model discloses a thread repair comb for threaded holes, comprising: a mounting sleeve providing a mounting base; a centering guide sleeve movably fitted onto the mounting sleeve; a drive assembly connected to a first end of the mounting sleeve to drive the mounting sleeve to move relative to the centering guide sleeve; a tool holder fixedly connected to a second end of the mounting sleeve to follow the movement of the mounting sleeve, the tool holder having an axial mounting hole; a plurality of blades slidably connected to the tool holder along the radial direction of the mounting sleeve, with each blade's radial ends exposed on the outside of the tool holder and inside the axial mounting hole, respectively; a lead screw adjustment assembly axially penetrating the mounting sleeve and fixedly connected to the mounting sleeve; and a positioning assembly fixedly connected to the free end of the lead screw adjustment assembly and moving with the lead screw adjustment assembly. The positioning assembly is configured with a gradually changing outer diameter and is always connected to the plurality of blades to adjust the radial position of the blades. By changing the proximity of the blades to the inner wall of the threaded hole through the positioning assembly, and by ensuring the stability and straightness of the blades and the overall structure in the threaded hole through the centering guide sleeve, the blades are prevented from shifting, thus improving the repair quality. This invention is used to repair damaged threads in the threaded holes of reactor pressure vessels, thereby improving repair efficiency and effectiveness. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a thread hole repair comb according to an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 A cross-sectional view of the thread repair comb in the threaded hole;

[0030] Figure 3 yes Figure 1 A schematic diagram of the tool holder structure;

[0031] Figure 4 yes Figure 1 A schematic diagram of the lead screw adjustment assembly in the diagram;

[0032] Figure 5 yes Figure 1 A schematic diagram of the positioning component in the diagram;

[0033] Figure 6 yes Figure 1 A schematic diagram of the blade structure in the image;

[0034] Figure 7 yes Figure 5 and Figure 6 The diagram shows the installation of the positioning components and the blade. Detailed Implementation

[0035] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] See Figures 1 to 7An embodiment of this utility model discloses a thread repair comb for threaded holes, including a mounting sleeve 1, a centering guide sleeve 2, a drive assembly 3, a tool holder 4, several blades 5, a lead screw adjustment assembly 6, and a positioning assembly 7. The mounting sleeve 1 provides a mounting base. The centering guide sleeve 2 is movably fitted onto the mounting sleeve 1. The drive assembly 3 is connected to the first end of the mounting sleeve 1 to drive the mounting sleeve 1 to move relative to the centering guide sleeve 2. The tool holder 4 is fixedly connected to the second end of the mounting sleeve 1 to follow the movement of the mounting sleeve 1, and the tool holder 4 has an axial mounting hole 44. Several blades 5 are slidably connected to the tool holder 4 along the radial direction of the mounting sleeve 1, and both radial ends of each blade 5 are exposed on the outside of the tool holder 4 and inside the axial mounting hole 44, respectively. The lead screw adjustment assembly 6 axially penetrates the mounting sleeve 1 and is fixedly connected to the mounting sleeve 1. The positioning assembly 7 is fixedly connected to the free end of the lead screw adjustment assembly 6 and moves with the lead screw adjustment assembly 6. The positioning assembly 7 is configured with a gradually changing outer diameter and is always connected to the several blades 5 to adjust the radial position of the blades 5.

[0040] The centering guide sleeve 2 abuts against or is snapped into the threaded hole. The mounting sleeve 1 is screwed to the centering guide sleeve 2. The drive assembly 3 drives the mounting sleeve 1 and the centering guide sleeve 2 to rotate relative to each other, thereby providing axial displacement to achieve tool feed or retraction. The positioning assembly 7 is configured with a gradually changing outer diameter; correspondingly, the insert 5 can also have a matching gradually changing outer diameter, allowing for gradual adjustment of the radial position of the insert 5. For example, when the smaller outer diameter of the insert 5 is connected to the smaller outer diameter of the positioning assembly 7, less of the insert 5 is exposed outside the tool holder 4, and more is exposed inside the axial mounting hole 44. Conversely, when the larger outer diameter of the insert 5 is connected to the larger outer diameter of the positioning assembly 7, the insert 5 moves outward, with more of the insert 5 exposed outside the tool holder 4 and less exposed inside the axial mounting hole 44. The number of inserts 5 can be three, five, six, etc., depending on actual needs.

[0041] like Figure 1 As shown, in some embodiments, the mounting sleeve 1 has a scale 11 on its outer side along its axial direction. The interval between two adjacent scales 11 is set as needed, such as 10mm, 20mm, 30mm, etc. The design of the scale 11 allows the operator to intuitively see the position of the blade 5, that is, the depth to which the blade 5 enters the threaded hole, which facilitates precise control of the repair depth.

[0042] like Figure 1 and Figure 2As shown, in some embodiments, the drive assembly 3 includes a connecting seat 31 and at least one drive member 32. The connecting seat 31 is fixedly connected to the mounting sleeve 1, and the drive member 32 is fixedly connected to the connecting seat 31 to drive the connecting seat 31 to rotate. The number of drive members 32 can be set according to actual needs. The drive member 32 can be a handle or a ratchet torque wrench. For example, in this embodiment, a ratchet torque wrench and multiple handles are provided. The ratchet torque wrench is fixedly disposed on the upper part of the connecting seat 31, and the multiple handles are fixedly disposed on the side of the connecting seat 31. When it is necessary to drive the mounting sleeve 1, either one can be selected to rotate the connecting seat 31 by means of a tool or manually, thereby rotating the mounting sleeve 1.

[0043] like Figure 3 As shown, in some embodiments, the tool holder 4 includes a tool holder 4 body and an end cap 43, the end cap 43 being detachably connected to the tool holder 4 body. The tool holder 4 body has a plurality of radial mounting holes 42, into which the blade 5 is inserted and abuts against the end cap 43. The tool holder 4 body provides mounting space and initially positions the blade 5 through friction. The end cap 43 bears the weight of the blade 5, preventing the blade 5 from falling out of the tool holder 4.

[0044] like Figure 4 As shown, in some embodiments, the lead screw adjusting assembly 6 includes a connecting rod 61 and a first adjusting nut 62. The first adjusting nut 62 is rotatably connected to the mounting sleeve 1 and screwed to the connecting rod 61. Rotating the first adjusting nut 62 allows for axial movement of the connecting rod 61, i.e., raising or lowering it. The connecting rod 61 provides displacement, enabling the movement of the adjusting assembly.

[0045] In some embodiments, the lead screw adjusting assembly 6 further includes a second adjusting nut 63, which is rotatably connected to the first adjusting nut 62. The connecting rod 61 includes a first threaded section 611 and a second threaded section 612 that are in contact, with different pitches. The first adjusting nut 62 is screwed to the first threaded section 611, and the second adjusting nut 63 is screwed to the second threaded section 612. Since the first threaded section 611 and the second threaded section 612 have different pitches, similarly, the first adjusting nut 62 and the second adjusting nut 63 also have different pitches. For example, if the pitch of the first threaded section 611 is less than the pitch of the second threaded section 612, rotating the first adjusting nut 62 can fine-tune the displacement of the connecting rod 61, and rotating the second adjusting nut 63 can coarsely adjust the displacement of the connecting rod 61. Fine-tuning and coarse-tuning are relative concepts and do not involve specific numerical values.

[0046] like Figure 5 and Figure 7As shown, in some embodiments, the positioning component 7 includes a cone 71 and a cone sleeve 72. The cone 71 is fixedly connected to the free end of the lead screw adjusting component 6 and abuts against the inner wall of the blade 5. The cone sleeve 72 is fitted onto the cone 71 and inserted into the blade 5 for positioning. The free end of the lead screw adjusting component 6 refers to the bottom end of the connecting rod 61. The cone 71 is connected to the bottom end of the connecting rod 61, which can be fixed by screwing, inserting, or welding. The cone 71 is used to adjust the radial position of the blade 5 and to limit the inward movement of the blade 5. The cone sleeve 72 is used to limit the outward movement of the blade 5. The cone 71 and the cone sleeve 72 together achieve the positioning of the blade 5. The cone sleeve 72 can be partially a cylindrical body, and the cone 71 can be partially a cylindrical body. The cylindrical body is fitted onto the cylindrical body to reinforce and fix the cone sleeve 72.

[0047] like Figure 6 and Figure 7 As shown, in some embodiments, the inner wall of the blade 5 is inclined, and the cone 71 abuts against the inner wall to restrict the inward movement of the blade 5. The blade 5 is provided with an inclined positioning groove 51, and the cone sleeve 72 includes a plurality of inclined contact portions 721, each contact portion 721 abutting against the positioning groove 51 to restrict the outward movement of the blade 5. The slope of the inner wall matches the taper of the cone 71. The inclination of the positioning groove 51 matches the inclination of the contact portions 721 of the cone sleeve 72.

[0048] like Figure 1 and Figure 2 As shown, in some embodiments, the threaded hole repair comb also includes a lifting ring 8, which is fixedly connected to the drive assembly 3. This facilitates the handling and installation of the equipment, and is particularly suitable for operation in confined spaces.

[0049] The method of using this utility model is as follows: First, the centering guide sleeve 2 is inserted above the threaded hole to be repaired. Then, the driving component 32 is operated to lower the mounting sleeve 1 and the tool holder 4. The entry position of the tool holder 4 can be observed through the scale 11 on the mounting sleeve 1, which is the scale 11 indicated on the top of the centering guide sleeve 2. Next, the first adjusting nut 62 or the second adjusting nut 63 is operated to lower the connecting rod 61 and the cone 71 and cone sleeve 72 of the positioning assembly 7, adjusting the radial position of the blade 5 so that the blade 5 abuts against the wall of the threaded hole, thereby performing the thread repair work. After the repair is completed, the operation is reversed to remove the mounting sleeve 1 and the tool holder 4.

[0050] By implementing this utility model, the following beneficial effects can be achieved:

[0051] This utility model's thread repair comb for threaded holes features a scale 11 on the outside of the mounting sleeve 1, allowing the operator to visually observe the position of the blade 5 and precisely control the repair depth. A positioning component 7 adjusts the proximity of the blade 5 to the inner wall of the threaded hole. A centering guide sleeve 2 ensures the stability and straightness of the blade 5 and the overall structure within the threaded hole, preventing blade 5 misalignment and improving repair quality. The top lifting ring 8 facilitates equipment handling and installation, making it particularly suitable for operation in confined spaces. This utility model is used for repairing damaged threads in reactor pressure vessels, improving repair efficiency and effectiveness.

[0052] 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, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. 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 thread repair comb for threaded holes, characterized in that, include: Install the sleeve (1) to provide the mounting base; Centering guide sleeve (2) is movably sleeved on the mounting sleeve (1); A drive assembly (3) is connected to the first end of the mounting sleeve (1) to drive the mounting sleeve (1) to move relative to the centering guide sleeve (2); The tool holder (4) is fixedly connected to the second end of the mounting sleeve (1) to move with the mounting sleeve (1), and the tool holder (4) is provided with an axial mounting hole (44); Several blades (5) are slidably connected to the tool holder (4) along the radial direction of the mounting sleeve (1), and the radial ends of each blade (5) are exposed on the outside of the tool holder (4) and inside the axial mounting hole (44), respectively. The lead screw adjustment assembly (6) axially passes through the mounting sleeve (1) and is fixedly connected to the mounting sleeve (1); The positioning component (7) is fixedly connected to the free end of the lead screw adjusting component (6) and moves with the lead screw adjusting component (6); the positioning component (7) is configured with a gradually changing outer diameter and is always connected to a plurality of the blades (5) to adjust the radial position of the blades (5).

2. The thread repair comb for threaded holes according to claim 1, characterized in that, The drive assembly (3) includes a connecting seat (31) and at least one drive member (32). The connecting seat (31) is fixedly connected to the mounting sleeve (1), and the drive member (32) is fixedly connected to the connecting seat (31) to drive the connecting seat (31) to rotate.

3. The thread repair comb for threaded holes according to claim 1, characterized in that, The tool holder (4) includes a tool holder (4) body and an end cap (43), and the end cap (43) is detachably connected to the tool holder (4) body; The main body of the blade holder (4) is provided with several radial mounting holes (42), and the blade (5) is inserted into the radial mounting holes (42) and abuts against the end cap (43).

4. The thread repair comb for threaded holes according to claim 1, characterized in that, The positioning component (7) includes a cone (71) and a cone sleeve (72). The cone (71) is fixedly connected to the free end of the lead screw adjusting component (6) and abuts against the inner wall of the blade (5). The cone sleeve (72) is sleeved on the cone (71) and inserted into the blade (5) for positioning.

5. The thread repair comb for threaded holes according to claim 4, characterized in that, The inner wall of the blade (5) is inclined, and the cone (71) abuts against the inner wall to restrict the inward movement of the blade (5); The blade (5) is provided with an inclined positioning groove (51), and the tapered sleeve (72) includes a plurality of inclined contact portions (721), each of the contact portions (721) abutting against the positioning groove (51) to restrict the outward movement of the blade (5).

6. The thread repair comb for threaded holes according to claim 1, characterized in that, The lead screw adjustment assembly (6) includes a connecting rod (61) and a first adjusting nut (62), the first adjusting nut (62) being rotatably connected to the mounting sleeve (1) and screwed to the connecting rod (61).

7. The thread repair comb for threaded holes according to claim 6, characterized in that, The lead screw adjusting assembly (6) further includes a second adjusting nut (63), which is rotatably connected to the first adjusting nut (62); The connecting rod (61) includes a first threaded section (611) and a second threaded section (612) that are in contact with each other, and the first threaded section (611) and the second threaded section (612) have different pitches; The first adjusting nut (62) is screwed to the first threaded section (611), and the second adjusting nut (63) is screwed to the second threaded section (612).

8. The thread repair comb for threaded holes according to claim 2, characterized in that, The drive component (32) is a handle or a ratchet torque wrench.

9. The thread repair comb for threaded holes according to any one of claims 1-8, characterized in that, The mounting sleeve (1) has a scale (11) on its outer side along its axial direction.

10. The thread repair comb for threaded holes according to any one of claims 1-8, characterized in that, It also includes a lifting ring (8), which is fixedly connected to the drive assembly (3).

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