Protective structure of core wire in cable assembly
Through the combined structure of the first connection sleeve, the second connection sleeve and the connecting screw sleeve, the problem of difficult protection of cable components in high temperature and high radiation environment is solved, and the core wire protection effect is achieved with a convenient and stable operation.
Patent Information
- Application Number
- CN202510262810.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-07-01
AI Technical Summary
During the assembly process, the existing cable assembly has little operating margin, difficulty in assembly, and difficult to return the internal core wire to the shell, which cannot meet the conditions of high temperature and high radiation resistance.
The combined structure of the first connecting sleeve, the second connecting sleeve and the connecting screw sleeve is adopted to block the exposed core wire by changing its axial position, and seal the gap after the connection is completed to achieve protection and prevent the core wire from returning to the shell.
It realizes effective protection of core wire under high temperature and high irradiation environment, is convenient to operate, and improves assembly stability and sealing.
Smart Images
Figure CN120237476A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of connector connection for 1E-class nuclear power plants, and particularly to a protection structure for internal core wires of a cable assembly. Background Art
[0002] The 1E-class connector cable assembly of the third-generation nuclear power plant is a product that can complete reactor emergency shutdown, containment isolation, core emergency cooling, reactor residual heat removal, heat removal from the reactor building, and prevent the emission of radioactive substances to the surroundings. It is an electrical penetration piece that connects the detector assembly, transmission cable, connection plate, and containment inside the reactor containment and outside the pressure vessel of the nuclear power plant, and is mainly used for transmitting weak current signals and weak voltage signals.
[0003] At present, during the assembly process of cable assemblies and cables, there is little operating margin, the assembly is difficult, and the cable needs to be dragged multiple times. For the cable assembly with connectors assembled at both ends, the internal core wires are relatively rigid, and it is very difficult to retract the core wires into the shell to achieve the purpose of cable protection, and it cannot meet the working conditions of high temperature and high radiation. Summary of the Invention
[0004] In order to overcome the deficiencies in the prior art, the present invention provides a protection structure for internal core wires of a cable assembly, which has the advantages of convenient operation and meeting the protection requirements.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] A protection structure for internal core wires of a cable assembly is used to shield the exposed core wires of the cable connected to the plug connector; it includes a first connecting sleeve, a second connecting sleeve, and a connecting screw sleeve; the second connecting sleeve is sleeved on the cable and one end close to the plug connector is used to connect the plug connector; the connecting screw sleeve is sleeved on the second connecting sleeve and is used to cover the plug connector and the gap between the second connecting sleeve and the plug connector; one end of the first connecting sleeve is sleeved and screwed on the second connecting sleeve, and the other end is sleeved on the end of the corrugated pipe located outside the cable.
[0007] By adopting the above technical solutions, the axial positions of the first connecting sleeve, the second connecting sleeve, and the connecting screw sleeve can be changed, so as to avoid the connection operation of the core wire and the plug connector. After the connection between the core wire and the plug connector is completed, the positions of the first connecting sleeve, the second connecting sleeve, and the connecting screw sleeve are changed again, so that the connecting screw sleeve covers the plug connector and the gap between the second connecting sleeve and the plug connector. One end of the first connecting sleeve is sleeved on the end of the corrugated pipe located outside the cable, shielding the exposed core wires of the cable connected to the plug connector to play a protective role. In this way, it is not necessary to retract the core wires of the cable into the shell, and the working conditions of high temperature and high radiation can be met, and the operation is convenient.
[0008] Optionally, a sliding guide groove is provided in a sunken manner on the outer surface of the second connecting sleeve; both ends of the sliding guide groove are sealed; one end of the connecting screw sleeve away from the plug connector has an annular sliding guide ring; the sliding guide ring is slidably arranged in the sliding guide groove.
[0009] By adopting the above technical solution, the cooperation between the sliding guide groove and the sliding guide ring makes it not easy for the second connecting sleeve and the connecting screw sleeve to separate and plays a guiding role, which is beneficial to improving the connection stability between the second connecting sleeve and the connecting screw sleeve.
[0010] Optionally, the second connecting sleeve includes a first adapter sleeve and a second adapter sleeve; shoulders are provided on the outer surfaces of both the first adapter sleeve and the second adapter sleeve; the sliding guide groove is located between the shoulders of the first adapter sleeve and the second adapter sleeve; the first adapter sleeve and the second adapter sleeve are combined to form the second connecting sleeve.
[0011] By adopting the above technical solution, the first adapter sleeve and the second adapter sleeve are combined to form the second connecting sleeve, so that the connection with the connecting screw sleeve can be completed during the assembly process of the second connecting sleeve, which is convenient for the connection between the second connecting sleeve and the connecting screw sleeve.
[0012] Optionally, one ends of the first adapter sleeve and the second adapter sleeve close to each other are threadedly connected and laser welded and sealed between them.
[0013] By adopting the above technical solution, the first adapter sleeve and the second adapter sleeve are threadedly connected and laser welded and sealed, greatly improving the sealing performance of the protection structure, thereby improving its protection ability.
[0014] Optionally, one end of the second connecting sleeve away from the plug connector has a cable clamp; the cable clamp includes a plurality of clamping plates distributed circumferentially; an extrusion wedge block is provided on the outer peripheral surface of one end of the clamping plate away from the plug connector; a conical extrusion wedge surface is provided on the inner surface of the first connecting sleeve; the extrusion wedge surface is adapted to the extrusion wedge block to drive one end of the clamping plate away from the plug connector to abut against the outer surface of the cable.
[0015] By adopting the above technical solution, the cable passes through the second connecting sleeve, and then the first connecting sleeve is rotated so that the extrusion wedge surface extrudes the extrusion wedge block of the clamping plate of the cable clamp, thereby driving one end of the clamping plate where the extrusion wedge block is located to move radially inwards to abut against the outer surface of the cable, so as to clamp the cable, which can prevent damage to the welding point caused by dragging of the cable during use.
[0016] Optionally, the first connecting sleeve includes a first sheath and a second sheath; the second sheath is located on the side of the first sheath away from the plug connector; the inner diameter of the end of the first sheath close to the corrugated pipe is smaller than the outer diameter of the end of the corrugated pipe; the first sheath and the second sheath are combined to form the first connecting sleeve; the second sheath has multiple length models to facilitate sleeving one end on the corrugated pipe to shield the core wire.
[0017] By adopting the above technical solution, since the second sheath has multiple length models, a second sheath with a suitable length can be selected according to the length of the exposed core wire, and then a first connecting sleeve with an appropriate length can be assembled, improving the assemblability of the protection structure.
[0018] Optionally, a connecting ring groove adapted to the second sheath is formed on the outer peripheral surface of the end of the first sheath close to the corrugated pipe; one end of the second sheath is located in the connecting ring groove; the first sheath and the second sheath are laser welded and sealed between them.
[0019] By adopting the above technical solution, by inserting one end of the second sheath into the connecting ring groove and then laser welding and sealing, the sealing performance of the protection structure is greatly improved, thereby improving its protection ability.
[0020] Optionally, a shoulder is provided on the outer peripheral surface of the plug connector; the second connecting sleeve is threadedly connected to the plug connector and abuts against the shoulder of the plug connector.
[0021] By adopting the above technical solution, the shoulder on the outer peripheral surface of the plug connector can play a role in blocking the second connecting sleeve, thereby improving the assembly stability of both the plug connector and the second connecting sleeve.
[0022] Optionally, after installation, the second connecting sleeve and the plug connector are laser welded and sealed, one end of the first connecting sleeve and the second connecting sleeve are laser welded and sealed, and the other end and the end of the corrugated pipe are laser welded and sealed.
[0023] By adopting the above technical solution, the gaps between the second connecting sleeve and the plug connector, between the first connecting sleeve and the second connecting sleeve, and between the first connecting sleeve and the end of the corrugated pipe are all sealed, greatly improving the sealing performance of the protection structure, thereby improving its protection ability. Description of the Drawings
[0024] Figure 1 is a schematic structural diagram of a partial section when the protection structure at one end of the cable of the present invention is completed and the protection structure at the other end is connected.
[0025] Figure 2 is a schematic structural diagram of a section when the protection structure at one end of the cable of the present invention is connected.
[0026] Figure 3 It is a schematic structural diagram of a cross-section where the protective structure at one end of the cable of the present invention is completed for connection.
[0027] Figure 4 It is a schematic structural diagram of a cross-section of the plug connector of the present invention.
[0028] Figure 5 It is a schematic structural diagram of a cross-section where the protective structure of the present invention is connected to the end of the corrugated pipe.
[0029] Description of reference numerals:
[0030] 10. Cable; 11. Core wire;
[0031] 20. Corrugated pipe; 21. Connection end;
[0032] 30. Plug connector; 31. External thread;
[0033] 40. Second sheath;
[0034] 50. First sheath; 500. Connection ring groove; 51. Extrusion wedge surface;
[0035] 60. Second adapter sleeve; 61. Third sleeve column; 611. External thread ring; 62. Fourth sleeve column; 63. Cable clamp; 630. Avoidance gap; 631. Clamping plate; 632. Extrusion wedge block;
[0036] 70. First adapter sleeve; 71. First sleeve column; 711. Internal thread ring; 72. Second sleeve column;
[0037] 80. Connection screw sleeve; 81. Sliding guide ring. Detailed implementation manners
[0038] The following further describes the present invention in detail with reference to the Figures 1-5 accompanying drawings.
[0039] Embodiment 1: Disclose a protective structure for the internal core wire of a cable assembly. Refer to Figure 1 , which includes a first sheath 50, a second sheath 40, a second adapter sleeve 60, a first adapter sleeve 70, and a connection screw sleeve 80; the second adapter sleeve 60 and the first adapter sleeve 70 are combined into a second connection sleeve; the first sheath 50 and the second sheath 40 are combined into a first connection sleeve and the ends of the second adapter sleeve 60 and the first adapter sleeve 70 close to each other are laser welded and sealed; the connection screw sleeve 80 is sleeved on the second connection sleeve and one end is slidably arranged on the second connection sleeve; the first sheath 50 is sleeved on the second adapter sleeve 60 and the two are threadedly connected; the second sheath 40 is located at one end of the first sheath 50 away from the second connection sleeve.
[0040] Refer toFigure 1 , the cable assembly includes a cable 10 and a corrugated pipe 20 sleeved outside the cable 10, and two connecting ends 21 of the corrugated pipe 20; both ends of the cable 10 expose the core wires 11 for connecting plug connectors 30; a protective structure is provided between both ends of the cable 10 and the two plug connectors 30 respectively, and the protective structure shields the exposed core wires 11 connected to the plug connectors 30; reference Figure 2 , before installing the core wire 11 and the connecting end 21, push the connecting nut 80, the first adapter sleeve 70, the second adapter sleeve 60, the first sheath 50 and the second sheath 40 towards the corrugated pipe 20 side to expose the core wire 11 for easy connection with the plug connector 30; reference Figure 3 , after the core wire 11 is connected to the connecting end 21, push the connecting nut 80, the first adapter sleeve 70, the second adapter sleeve 60, the first sheath 50 and the second sheath 40 towards the plug connector 30 side, and then laser weld and seal between the plug connector 30 and the first adapter sleeve 70, laser weld and seal between the first sheath 50 and the second adapter sleeve 60, laser weld and seal between the second sheath 40 and the first sheath 50, and laser weld and seal between the second sheath 40 and the connecting end 21, so as to improve the sealing performance of the protective structure and thus improve its protection ability.
[0041] Reference Figure 4 , a shoulder is formed on the outer surface of the plug connector 30, and an external thread 31 is formed at one end of the plug connector 30 close to the first adapter sleeve 70, reference Figure 5 , an internal thread is formed at one end of the first adapter sleeve 70. During installation, the first adapter sleeve 70 is sleeved on the end face of the plug connector 30, and then the first adapter sleeve 70 is rotated until the first adapter sleeve 70 abuts against the shoulder of the plug connector 30, so that the first adapter sleeve 70 is not easily rotated accidentally, which is beneficial to subsequent laser welding and sealing.
[0042] Reference Figure 5, the first adapter sleeve 70 is composed of a first sleeve column 71 and a second sleeve column 72; the outer diameter of the second sleeve column 72 is greater than that of the first sleeve column 71 to form a shoulder; the second adapter sleeve 60 is composed of a third sleeve column 61 and a fourth sleeve column 62; the inner and outer diameters of the third sleeve column 61 are respectively the same as the inner and outer diameters of the first sleeve column 71; the outer diameter of the fourth sleeve column 62 is greater than that of the third sleeve column 61 to form a shoulder; the inner diameter of the fourth sleeve column 62 is adapted to the outer diameter of the cable 10, so that the fourth sleeve column 62 can slide coaxially outside the cable 10. The inner diameter of the third sleeve column 61 is greater than the diameter of the core wire 11 of the cable 10 and less than the outer diameter of the cable 10. In this way, when the second adapter sleeve 60 is pushed towards the cable 10, the second adapter sleeve 60 will not detach from the other end of the cable 10 along the cable 10. To facilitate the laser welding and sealing of the first adapter sleeve 70 and the second adapter sleeve 60, an internal thread ring 711 is formed at one end of the first sleeve column 71 close to the third sleeve column 61; an external thread ring 611 is formed at one end of the third sleeve column 61 close to the first sleeve column 71; the external thread ring 611 is used for threaded connection with the internal thread ring 711.
[0043] Reference Figure 5 , a circular ring groove-shaped sliding guide groove is formed between the shoulder of the first adapter sleeve 70 and the shoulder of the second adapter sleeve 60. One end of the connecting nut sleeve 80 away from the plug connector 30 has a circular sliding guide ring 81; when the second connecting sleeve is connected to the connecting nut sleeve 80, the first adapter sleeve 70 is inserted into the connecting nut sleeve 80 and the first sleeve column 71 passes through the sliding guide ring 81, and then the external thread ring 611 is screwed onto the internal thread ring 711. At this time, the sliding guide ring 81 enters the sliding guide groove, and finally the first sleeve column 71 and the third sleeve column 61 are laser welded and sealed, so that the connection between the second connecting sleeve and the connecting nut sleeve 80 is completed synchronously during the assembly of the second connecting sleeve. Reference Figure 3 , after the core wire 11 is connected to the connecting end portion 21, the connecting nut sleeve 80 is pushed towards the plug connector 30 side to cover the entire plug connector 30, so as to protect the plug connection of the plug connector 30 to the outside, and at the same time cover the gap between the second connecting sleeve and the plug connector 30.
[0044] Reference Figure 5 , the inner diameter of one end of the first sheath 50 close to the corrugated pipe 20 is smaller than the outer diameter of the connecting end portion 21 of the corrugated pipe 20. To facilitate the subsequent laser welding and sealing between the first sheath 50 and the second sheath 40, a connecting ring groove 500 adapted to the second sheath 40 is formed on the outer peripheral surface of one end of the first sheath 50 close to the corrugated pipe 20; in this way, before laser welding and sealing, one end of the second sheath 40 is inserted into the connecting ring groove 500 so that the positions of the first sheath 50 and the second sheath 40 are relatively stable.
[0045] Reference Figure 5, the inner diameter of the second sheath 40 is adapted to the outer diameter of the connecting end 21 of the corrugated pipe 20, so that the second sheath 40 moves coaxially along the corrugated pipe 20.
[0046] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that in order to improve the assemblability of the protection structure, the second sheath 40 has multiple length models, so as to adapt to the protection of the exposed core wires 11 of different lengths.
[0047] Embodiment 3: The difference between Embodiment 3 and Embodiment 1 is that with reference to Figure 5 , one end of the fourth sleeve column 62 far from the third sleeve column 61 has a cable clamp 63, and the cable clamp 63 includes a plurality of clamping plates 631 distributed circumferentially; an avoidance gap 630 is arranged between adjacent clamping plates 631; an extrusion wedge block 632 is arranged on the outer peripheral surface of one end of the clamping plate 631 far from the plug connector 30; a tapered extrusion wedge surface 51 is arranged on the inner surface of the first connecting sleeve; the extrusion wedge surface 51 is adapted to drive the end of the clamping plate 631 far from the plug connector 30 to abut against the outer surface of the cable 10.
[0048] During operation, rotate the first connecting sleeve so that the extrusion wedge surface 51 extrudes the extrusion wedge block 632 of the clamping plate 631 of the cable clamp 63, thereby driving one end of the clamping plate 631 where the extrusion wedge block 632 is located to move radially inwards to abut against the outer surface of the cable 10 so as to clamp the cable 10, which can prevent damage to the welding point caused by the dragging of the cable 10 during use.
[0049] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.
Claims
1. A protective structure for the inner core wire of a cable assembly, used for shielding the exposed core wire (11) of a cable (10) connected to a plug connector (30); characterized in that: The invention comprises a first connecting sleeve, a second connecting sleeve and a connecting screw sleeve (80); the second connecting sleeve is sleeved on the cable (10) and is close to one end of the plug connector (30) for connecting the plug connector (30); the connecting screw sleeve (80) is sleeved on the second connecting sleeve and is used to cover the plug connector (30) and the gap between the second connecting sleeve and the plug connector (30); one end of the first connecting sleeve is sleeved on and screwed on the second connecting sleeve, and the other end is sleeved on the end of a corrugated tube (20) located outside the cable (10).
2. A protective structure for the inner core wire of a cable assembly according to claim 1, characterized in that: The outer surface of the second connecting sleeve has a sliding guide groove which is set downward; both ends of the sliding guide groove are sealed; the end of the connecting screw sleeve (80) away from the plug connector (30) has a circular sliding guide ring (81); the sliding guide ring (81) is slidably set in the sliding guide groove.
3. A protective structure for the inner core wire of a cable assembly according to claim 2, characterized in that: The second connecting sleeve comprises a first adapter sleeve (70) and a second adapter sleeve (60); shaft shoulders are arranged on the outer surfaces of the first adapter sleeve (70) and the second adapter sleeve (60); the sliding guide groove is located between the shaft shoulders of the first adapter sleeve (70) and the second adapter sleeve (60); the first adapter sleeve (70) and the second adapter sleeve (60) are combined into the second connecting sleeve.
4. A protective structure for the inner core wire of a cable assembly according to claim 3, characterized in that: The first adapter sleeve (70) and the second adapter sleeve (60) are threadedly connected at one end close to each other and are sealed by laser welding.
5. The protective structure for the inner core wire of a cable assembly according to claim 1, characterized in that: The end of the second connecting sleeve away from the plug connector (30) is provided with a cable clamp (63); the cable clamp (63) includes a plurality of circumferentially distributed clamping plates (631); an extrusion wedge block (632) is provided on the outer peripheral surface of the end of the clamping plate (631) away from the plug connector (30); the inner surface of the first connecting sleeve is provided with a conical extrusion wedge surface (51); the extrusion wedge surface (51) is adapted to the extrusion wedge block (632) to drive the end of the clamping plate (631) away from the plug connector (30) to press against the outer surface of the cable (10).
6. The protective structure for the inner core wire of a cable assembly according to claim 1, characterized in that: The first connecting sleeve comprises a first sheath (50) and a second sheath (40); the second sheath (40) is located on a side of the first sheath (50) away from the plug connector (30); the inner diameter of one end of the first sheath (50) close to the corrugated tube (20) is smaller than the outer diameter of the end of the corrugated tube (20); the first sheath (50) and the second sheath (40) are combined to form the first connecting sleeve; the second sheath (40) has a variety of length models so that one end can be sleeved on the corrugated tube (20) to cover the core wire (11).
7. A protective structure for the inner core wire of a cable assembly according to claim 6, characterized in that: A connecting ring groove (500) adapted to the second sheath (40) is formed on the outer peripheral surface of one end of the first sheath (50) close to the corrugated tube (20); one end of the second sheath (40) is located in the connecting ring groove (500); and the first sheath (50) and the second sheath (40) are sealed by laser welding.
8. The protective structure for the inner core wire of a cable assembly according to claim 1, characterized in that: The outer peripheral surface of the plug connector (30) is provided with a shaft shoulder; the second connecting sleeve is threadedly connected to the plug connector (30) and abuts against the shaft shoulder of the plug connector (30).
9. The protective structure for the inner core wire of a cable assembly according to claim 1, characterized in that: After installation is completed, the second connecting sleeve and the plug connector (30) are sealed by laser welding, one end of the first connecting sleeve and the second connecting sleeve are sealed by laser welding, and the other end of the first connecting sleeve and the end of the bellows (20) are sealed by laser welding.