High-voltage submarine cable first-aid repair joint

Abstract

The utility model relates to the technical field of power equipment, in particular to a first-aid repair joint for a high-voltage submarine cable. The utility model discloses a high-voltage submarine cable first-aid repair joint, which comprises a pressure-resistant copper shell, the pressure-resistant copper shell comprises a detachable middle connecting part, two ends of the middle connecting part are respectively and detachably connected with an end cover, each end cover is detachably internally connected with a fixing ring, and the fixing rings are used for being connected with a cable. The technical problem to be solved by the utility model is to provide a high-voltage submarine cable first-aid repair joint capable of improving the installation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to a high-voltage submarine cable emergency repair joint. Background Art

[0002] The construction of submarine cable projects is restricted by conditions such as regional construction and construction equipment. The construction involves a wide range of technical fields, large investment scales, and complex construction technologies. However, submarine cable projects also have safety hazards. For example, improper use of fishing gear and anchors may cause damage to submarine cables, and failures may occur during long-term operation. Therefore, it is inevitable that emergency repairs to submarine cables will occur after the project is completed. However, the installation and production of existing conventional submarine power cable joints are very complicated, requiring valuable operating vessel time, special equipment for making and deploying joints, a highly specialized onboard operating team, and suitable weather conditions for a long enough period of time. The above harsh production conditions are not only costly, but also inefficient.

[0003] Therefore, those skilled in the art are committed to developing a high-voltage submarine cable repair joint that can improve installation efficiency. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the utility model discloses a high-voltage submarine cable emergency repair joint, and the technical problem to be solved is to provide a high-voltage submarine cable emergency repair joint which can improve the installation efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides a high-voltage submarine cable repair joint, including a pressure-resistant copper shell, the pressure-resistant copper shell includes a detachable intermediate connecting part, the two ends of the intermediate connecting part are respectively detachably connected with end covers, each of the end covers is detachably connected with a fixing ring, and the fixing ring is used to connect with the cable.

[0006] Preferably, the intermediate connecting part and the fixing ring are both Hough structures, thereby making it more convenient to install the intermediate connecting part and the fixing ring.

[0007] Preferably, the outer edge of the fixing ring is provided with a connecting convex ring, the inside of the end cover is provided with a step ring corresponding to the connecting convex ring, and the connecting convex ring and the step ring are both provided with connecting holes, and bolts can be installed in the connecting holes to reinforce the fixing ring and the end cover. In order to facilitate installation, the thickness of the fixing ring and the step ring are equal, and the two can just fit each other.

[0008] Preferably, a retractable auxiliary rod is detachably installed between the two end covers, and the auxiliary rod can be retracted and retracted by means of a threaded knob or hydraulically. By adding and installing an auxiliary rod, the auxiliary rod can serve as a support between the two end covers to facilitate the handling of the cables at the broken part. At the same time, the two end covers with the cables at both ends can be brought closer to each other by contracting the auxiliary rod, which can reduce the workload of the installers, the use time of the operating vessel, and the operating risk. The high-voltage submarine cable repair joint of the utility model will not reduce the conductivity of the cable conductor, and at the same time it also reduces the operating time, thereby reducing the operating risk and the use cost of the operating vessel to a certain extent.

[0009] Preferably, the number of the auxiliary rods is at least four and they are evenly distributed in a circle.

[0010] Preferably, an intermediate joint stress cone is further provided in the intermediate connection portion, and the intermediate joint stress cone is used to connect with the cable. Specifically, the interior of the intermediate joint stress cone includes a semi-conductive inner shield and semi-conductive stress cones located on both sides of the semi-conductive inner shield, the semi-conductive stress cone and the semi-conductive inner shield are wrapped with insulation, and a semi-conductive outer shield is provided outside the insulation. During installation, the semi-conductive inner shield needs to be located outside the disconnection joint.

[0011] The utility model also provides a method for installing a high-voltage submarine cable emergency repair joint, using the high-voltage submarine cable emergency repair joint as described above, comprising the following steps:

[0012] 1) Confirm the location where the cable fault occurs and salvage the cable onto the ship; peel off the outer lining layers at both ends of the cable fault location and fix them with cable ties and waterproof tapes; peel off the steel wire armor layer and fix it with the fixing ring;

[0013] 2) Fix the two end covers on the fixing ring and reinforce them with bolts, and fix the auxiliary rod between the two end covers;

[0014] 3) Cut off the faulty part of the cable and process the cable, and at the same time cast the bending resistors at the outer ends of the two end caps;

[0015] 4) Sleeve the intermediate joint stress cone on the long end of the cable, and then tighten the auxiliary rod;

[0016] 5) crimping the cable conductor with a copper crimping rod to form a copper conductor, connecting the shielding cover, and pushing the middle joint stress cone to the connection of the copper conductor;

[0017] 6) Remove the auxiliary rod, install the middle connecting part, tighten the reinforcing bolts of the pressure-resistant copper shell, inject sealant, and the installation of the high-voltage submarine cable repair joint is completed.

[0018] The beneficial effects of the utility model are:

[0019] By designing the emergency repair joint as a detachable middle connection part and two end covers, and the end cover is detachably connected with a fixing ring, the fixing ring can be connected to the cable first, and then the fixing ring can be connected to the end cover, so as to fix the end cover to the cable, and finally the middle connection part can be installed after the internal structure of the broken wire is connected. In this way, the emergency repair distribution of the high-voltage submarine cable, which is originally large in volume and weight, is refined, the installation efficiency is improved, and the installation quality is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model after the high-voltage submarine cable repair joint is installed;

[0021] Figure 2 It is a partial structural schematic diagram of the stress cone of the intermediate joint of the high-voltage submarine cable emergency repair joint of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a fixing ring of a high-voltage submarine cable emergency repair joint of the utility model;

[0023] Figure 4 It is a schematic diagram of the cutaway structure of the fixing ring of the high-voltage submarine cable repair joint of the utility model;

[0024] Figure 5 It is a schematic diagram corresponding to step 1) and step 2) of the installation method of the utility model;

[0025] Figure 6 It is a schematic diagram corresponding to step 3) and step 4) of the installation method of the utility model;

[0026] Figure 7 It is a schematic diagram corresponding to step 5) of the installation method of the utility model;

[0027] Figure 8 It is a schematic diagram corresponding to step 6) of the installation method of the utility model.

[0028] In the above drawings: 1. pressure-resistant copper shell; 11. intermediate connecting part; 12. end cover; 13. anti-bending device; 2. fixing ring; 21. connecting convex ring; 22. connecting hole; 3. auxiliary rod; 4. intermediate joint stress cone; 41. semi-conductive inner shield; 42. semi-conductive stress cone; 43. insulation; 44. semi-conductive outer shield; 5. copper crimping rod; 6. cable. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] like Figure 1 As shown, the utility model provides a high-voltage submarine cable emergency repair joint, including a pressure-resistant copper shell 1, the pressure-resistant copper shell 1 includes a detachable intermediate connection part 11, and the two ends of the intermediate connection part 11 are detachably connected with end covers 12, each end cover 12 is detachably connected with a fixing ring 2, and the fixing ring 2 is used to connect with the cable 6. At the same time, the intermediate connection part 11 and the fixing ring 2 are both Hough structures, so that the intermediate connection part 11 and the fixing ring 2 can be installed more conveniently.

[0031] like Figure 2 and Figure 1 As shown, an intermediate joint stress cone 4 is further provided in the intermediate connection portion 11, and the intermediate joint stress cone 4 is used to connect with the cable 6. Specifically, the interior of the intermediate joint stress cone 4 includes a semi-conductive inner shield 41 and semi-conductive stress cones 42 located on both sides of the semi-conductive inner shield 41, and the semi-conductive stress cone 42 and the semi-conductive inner shield 41 are wrapped with insulation 43, and a semi-conductive outer shield 44 is provided outside the insulation 43. During installation, the semi-conductive inner shield 41 needs to be located outside the disconnection joint.

[0032] In the above embodiment, by designing the emergency repair joint as a detachable middle connection part 11 and two end covers 12, and the end cover 12 is detachably connected with a fixing ring 2, the fixing ring 2 can be connected to the cable 6 first, and then the fixing ring 2 can be connected to the end cover 12, so that the end cover 12 is fixed to the cable 6, and finally the middle connection part 11 is installed after the internal structure of the broken wire is connected. In this way, the emergency repair distribution of the high-voltage submarine cable, which is originally large in volume and weight, is refined, the installation efficiency is improved, and the installation quality is guaranteed.

[0033] like Figure 3-4 As shown, the outer edge of the fixing ring 2 is provided with a connecting protruding ring 21, and the inside of the end cover 12 is provided with a step ring corresponding to the connecting protruding ring 21. The connecting protruding ring 21 and the step ring are both provided with connecting holes 22, and the fixing ring 2 and the end cover 12 can be reinforced by installing bolts in the connecting holes 22. In order to facilitate installation, the fixing ring 2 and the step ring are of equal thickness, and the two can just fit each other.

[0034] In addition, a retractable auxiliary rod 3 is detachably installed between the two end covers 12, and the auxiliary rod 3 here can be retracted and retracted by means of a threaded knob or hydraulically. The number of auxiliary rods 3 is at least four, and they are evenly distributed in a circle. By adding the auxiliary rod 3, the auxiliary rod 3 can be used as a support between the two end covers 12 to facilitate the handling of the cables at the broken part. At the same time, the two end covers 12 with the cables at both ends can be brought closer to each other by contracting the auxiliary rod 3, which can reduce the workload of the installers, the use time of the operating vessel, and the operating risk. The high-voltage submarine cable repair joint of the utility model will not reduce the conductivity of the cable conductor, and at the same time it also reduces the operating time, thereby reducing the operating risk and the use cost of the operating vessel to a certain extent.

[0035] like Figures 5 to 8 As shown, the utility model also provides a method for installing a high-voltage submarine cable emergency repair joint, using the high-voltage submarine cable emergency repair joint as above, comprising the following steps:

[0036] 1) Confirm the location where the cable 6 fails and salvage the cable 6 onto the ship; peel off the outer lining layers at both ends of the faulty part of the cable 6 and fix them with cable ties and waterproof tapes; peel off the steel wire armor layer and fix it with a fixing ring 2;

[0037] 2) Fix the two end covers 12 on the fixing ring 2 and reinforce them with bolts, and fix the auxiliary rod 3 between the two end covers 12;

[0038] 3) Cut off the faulty part of the cable 6 and process the cable, and at the same time cast the bending resistor 13 at the outer ends of the two end caps 12;

[0039] 4) Put the middle joint stress cone 4 on the long end of the cable 6, and then tighten the auxiliary rod 3;

[0040] 5) Crimping the cable 6 conductor with the copper crimping rod 5, connecting the shielding cover, and pushing the middle joint stress cone 4 to the copper conductor connection;

[0041] 6) Remove the auxiliary rod 3, install the middle connecting part 11, tighten the reinforcing bolts of the pressure-resistant copper shell 1, and inject sealant. The installation of the high-voltage submarine cable repair joint is completed.

[0042] In the above embodiment, by adopting the above installation method, the high-voltage submarine cable emergency joint is reliable, efficient and safe compared to the conventional submarine power cable joint. At the same time, the application of the special pressure-resistant copper shell 1 and the corresponding retractable auxiliary rod 3 can reduce the workload of the installers, the use time of the operation boat and the operation risk, and reduce the operation risk and the use cost of the operation boat to a certain extent.

[0043] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A high voltage submarine cable repair joint, characterized in that: The invention comprises a pressure-resistant copper shell (1), wherein the pressure-resistant copper shell (1) comprises a detachable middle connecting part (11), and both ends of the middle connecting part (11) are detachably connected to end covers (12), and each end cover (12) is detachably internally connected to a fixing ring (2), and the fixing ring (2) is used to connect to a cable (6).

2. The high-voltage submarine cable repair joint according to claim 1, characterized in that: The intermediate connecting portion (11) and the fixing ring (2) are both Hough structures.

3. The high-voltage submarine cable repair joint according to claim 2, characterized in that: The outer edge of the fixing ring (2) is provided with a connecting protruding ring (21), the interior of the end cover (12) is provided with a step ring corresponding to the connecting protruding ring (21), and the connecting protruding ring (21) and the step ring are both provided with corresponding connecting holes (22).

4. The high-voltage submarine cable repair joint according to claim 2, characterized in that: A telescopic auxiliary rod (3) is detachably mounted between the two end covers (12).

5. The high-voltage submarine cable repair joint according to claim 4, characterized in that: The number of the auxiliary rods (3) is at least four.

6. The high-voltage submarine cable repair joint according to claim 1, characterized in that: An intermediate joint stress cone (4) is also provided in the intermediate connecting portion (11), and the intermediate joint stress cone (4) is used for connecting to the cable (6).

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