A high-voltage cable quick prefabricated flexible connector

Abstract

The utility model discloses a kind of high-voltage cable quick prefabricated flexible connector, it is related to cable field, including soft connection subassembly, the soft connection subassembly includes cable one, and the fixed sleeve is fixedly connected in the fixed sleeve inside the fixed ring of being fixedly connected with several in cable one core, which is sleeved on the fixed ring of cable one core. Advantageous effect lies in: soft connection subassembly is prefabricated part, and the standardized assembly of cable one and fixed sleeve is completed in factory, and the complex process such as field stripping, welding is reduced, and only needs to be connected cable two and connection terminal subassembly fast fixed when repairing, and then through mechanical structure realizes the butt joint with soft connection subassembly, entire process does not need to rely on professional welding equipment, significantly shorten field operation time, satisfy the timeliness requirement of fault repair.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a quick-prefabricated flexible connector for high-voltage cables. Background Technology

[0002] In the laying and emergency repair of power and communication lines, the connection quality of cable joints directly determines the operational stability of the lines. In traditional cable connection processes, the cable cores need to be exposed before direct welding. High temperatures can easily cause oxidation of the core material, and uneven solder layer thickness can cause fluctuations in contact resistance. Connection is achieved by pressing the core with only one or two sets of bolts. Long-term vibration can cause the bolts to loosen, and the point contact mode between the core and the bolts is prone to generating electric sparks.

[0003] For large-section cables, traditional crimping requires the use of tonnage-level crimping pliers, which are not only inconvenient to carry, but also the mismatch between the crimping die and the cable specifications can lead to insufficient mechanical strength at the interface. Utility Model Content

[0004] The purpose of this utility model is to provide a quick-prefabricated flexible connector for high-voltage cables in order to solve the above problems, as detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a high-voltage cable quick prefabricated flexible connector, including a flexible connector assembly and two connection terminal assemblies. The flexible connector assembly includes a cable, and each end of the cable has a fixed sleeve. Several fixed rings are fixedly connected to the cable core.

[0007] The above-mentioned high-voltage cable quick prefabricated flexible connector uses a prefabricated flexible connector assembly, mainly consisting of a cable and two fixing sleeves. The fixing sleeves are installed on the core of the cable and are filled with tin to improve the firmness of the connection between the fixing sleeve and the cable and the stability of conductivity. The two cables to be connected are stripped at opposite ends, and the core is inserted into the sleeve of the connecting terminal assembly. The screw is rotated to support the core of the cable and deform it into the groove, preventing the cable from detaching from the sleeve. The connecting sleeve is inserted into the fixing sleeve, and the pull rod is inserted into the screw. The screw is rotated to pass through the connecting sleeve, thus locking the fixing sleeve and the connecting sleeve. The pull rod can limit the screw to prevent it from loosening.

[0008] Preferably, the fixing sleeve is filled with tin.

[0009] Preferably, a pull rod is fixedly connected inside the fixed sleeve along the length of the fixed sleeve.

[0010] Preferably, the surface of the fixing sleeve is fixedly connected with several annular rings.

[0011] Preferably, the fixing sleeve has at least two screw holes, and a screw is threaded into the screw hole.

[0012] Preferably, the two connecting terminal assemblies are respectively fixedly installed on two fixed sleeves, and a second cable is fixedly connected inside the connecting terminal assembly.

[0013] Preferably, the connection terminal assembly includes a sleeve, the battery core of the second cable is clearance-fitted with the inner wall of the sleeve, the sleeve has at least two threaded holes, and a screw is threaded into the threaded holes, the end of the screw corresponds to the surface of the battery core of the second cable, and the inner wall of the sleeve has a groove corresponding to the screw.

[0014] Preferably, a connecting sleeve is fixedly connected to the side of the sleeve corresponding to the fixed sleeve, the connecting sleeve is clearance-fitted with the inner wall of the fixed sleeve, and the screw passes through the connecting sleeve.

[0015] Preferably, the connecting sleeve, the sleeve, and the screw are all provided with holes at their corresponding positions, and the pull rod passes through the screw through the holes.

[0016] Preferably, two cold shrink sleeves are fitted on one surface of the cable, and the two cold shrink sleeves are respectively fitted onto two connecting terminal assemblies and two other surfaces of the cable.

[0017] The beneficial effects are:

[0018] 1. The flexible connection component is a prefabricated component. The standardized assembly of cable one and the fixing sleeve is completed in the factory, which reduces complex processes such as wire stripping and welding on site. During emergency repair, it is only necessary to quickly fix the cable two to be connected to the connection terminal assembly, and then realize the docking with the flexible connection component through mechanical structure. The whole process does not rely on professional welding equipment, which significantly shortens the on-site operation time and meets the timeliness requirements of emergency repair.

[0019] 2. The fixed sleeve is filled with tin, which not only improves the bonding strength with the first cable core, but also ensures the continuity of the conductive path and reduces the contact resistance. The second screw supports the second cable core, causing it to deform and embed into the groove, forming a mechanical locking structure, which effectively prevents the second cable from detaching from the sleeve. The cooperation between the connecting sleeve and the fixed sleeve and the locking of the first screw further enhance the connection stability of the flexible connection component and the connecting terminal component, avoiding loosening caused by external forces such as vibration and pulling.

[0020] 3. The tin-filled layer and the tightly connected battery core structure (cable one and the fixing sleeve, cable two and the sleeve) form a low-impedance conductive path, reducing the loss in the process of power or signal transmission. At the same time, the design of the pull rod passing through screw two limits screw two, preventing it from loosening due to long-term use and affecting the conductive contact, thus ensuring the long-term stability of the line's conductivity.

[0021] 4. The cold shrink tubing on the surface of cable one covers the connection parts of the terminal assembly and cable two, which can effectively isolate moisture, dust and other impurities, and avoid oxidation and corrosion of the connection point. The annular ring on the surface of the fixing sleeve can enhance the fit with the cold shrink tubing or other sealing materials, further improving the sealing performance of the overall structure and making the device adaptable to complex environments such as humid and dusty conditions.

[0022] 5. Quick connection is achieved through mechanical structures such as screws and sleeves, eliminating the need for construction personnel to master complex welding or crimping techniques, thus reducing reliance on operational skills. The clearance fit between the connecting sleeve and the fixing sleeve, as well as the correspondence between the pull rod and the channel, provide clear installation guidance, reducing operational errors. By adjusting the size of the fixing sleeve and sleeve, different specifications of cables can be adapted to meet the connection needs of cables with various cross-sections.

[0023] 6. The multiple sets of screw one and screw two, as well as the limiting structure of the pull rod, enable the connection part to withstand a certain amount of tension and torque, adapt to the mechanical requirements of different installation scenarios, and improve the versatility and practicality of the device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0026] Figure 2 This is a front view structural diagram of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the flexible connection component of this utility model;

[0028] Figure 4 This is a three-dimensional structural diagram of the fixing sleeve of this utility model;

[0029] Figure 5 This is a three-dimensional cross-sectional structural diagram of the connection terminal assembly of this utility model;

[0030] Figure 6 This is a three-dimensional cross-sectional structural diagram of the connection terminal assembly and the fixing sleeve of this utility model.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Flexible connector assembly; 2. Cable 1; 3. Fixing sleeve; 4. Ring; 5. Pull rod; 6. Screw 1; 7. Fixing ring; 8. Cold shrink tubing; 9. Connecting terminal assembly; 10. Cable 2; 11. Sleeve; 12. Groove; 13. Screw 2; 14. Connecting sleeve. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] See Figures 1-6 As shown, this utility model provides a high-voltage cable quick-prefabricated flexible connector, including a flexible connector assembly 1. The flexible connector assembly 1 includes a cable 2, which is a copper core cross-linked polyethylene insulated cable of type YJV with a nominal cross-section of 10-240mm². 2 The battery core consists of multi-strand stranded copper wires with a single wire diameter of 0.2-0.5mm. The insulation layer thickness is 2.5-5mm, increasing with the cross-section. The exposed section of the battery core is 50-80mm long, matching the length of the fixing sleeve. The exposed section needs to be polished to remove the oxide layer and expose the fresh copper surface, with a roughness of Ra1.6. Both ends of the battery core in cable 1 are fixedly connected to fixing sleeves 3, made of T2 copper with a conductivity ≥98% IACS, a wall thickness of 3-5mm, and a length 10-15mm longer than the exposed section of the battery core in cable 1. The gap between the inner wall and the battery core is 0.1-0.3mm, facilitating filling. Solder filling; the outer wall machining accuracy is IT8 to ensure the stability of the fit with the connecting sleeve. Several fixing rings 7 are fixedly connected inside the fixing sleeve 3 and are sleeved on the battery core of cable 2. They are made of copper T3, and the number is 3-5 depending on the cross-section of cable 1. The larger the cross-section, the more rings are needed. The inner diameter is 0.02-0.05mm smaller than the outer diameter of the battery core for interference fit. The thickness is 2-3mm and the spacing between adjacent fixing rings is 5-8mm. The sleeve positions are distributed starting 10-15mm from the end of the battery core. The function is to enhance the mechanical anchoring effect during solder filling and prevent axial displacement of the battery core.

[0035] The first fixing ring 7 is 10-15mm from the end of the battery cell, and the subsequent fixing rings 7 are evenly distributed along the axis of the battery cell with a spacing of 5-8mm. The coaxiality of the axis of all fixing rings 7 with the axis of the battery cell is ≤0.05mm. The gap between the outer circle of the fixing ring 7 and the inner wall of the fixing sleeve 3 is 0.05-0.1mm to ensure that the solder can fully fill the gap.

[0036] The coaxiality of the cable core 2 and the fixed sleeve 3 is ≤0.1mm; the distance between the end of the core and the end of the fixed sleeve 3 is 5-8mm to allow space for tin filling; the end of the insulation layer is flush with the end of the fixed sleeve 3 with an error of ≤±1mm.

[0037] Two connecting terminal assemblies 9 are fixedly installed on two fixed sleeves 3 respectively, and a cable 10 is fixedly connected inside the connecting terminal assembly 9.

[0038] As an optional implementation, the fixing sleeve 3 is filled with tin, using Sn99.5Sb0.5 tin alloy with a melting point of 232℃. The vacuum degree of filling is ≤-0.09MPa through vacuum casting process to avoid the generation of air bubbles. After filling, the tin layer forms a metallurgical bond with the fixing ring, the battery cell and the inner wall of the fixing sleeve. The cooling rate is controlled at 5-10℃ / min to reduce internal stress.

[0039] A tie rod 5 is fixedly connected inside the fixing sleeve 3 along its length. The tie rod has a diameter of 8-12mm to match the inner diameter of the fixing sleeve. It is made of 45 steel with heat treatment and a hardness of 220-250HB. Both ends are machined with M6-M8 external threads to lock with nuts. The tolerance for the fit with the channel is H7 / h6, and the straightness is ≤0.1mm / m to ensure no jamming during penetration. The surface is galvanized with a zinc layer thickness of 8-12μm, and after passivation treatment, the salt spray resistance is ≥500h.

[0040] The surface of the fixed sleeve 3 is fixedly connected with several annular rings 4, which are made of silicone rubber with a Shore hardness of 60±5, a semi-circular cross-section with a diameter of 3-5mm, 4-6 rings, and a spacing of 10-15mm. The rings are bonded to the outer wall of the fixed sleeve by molding process with a bonding strength of ≥2MPa. The best sealing effect can be achieved when the compression is controlled at 20-30%.

[0041] The fixing sleeve 3 has at least two screw holes, and screw 6 is threaded into the screw holes.

[0042] The connecting terminal assembly 9 includes a sleeve 11, and the core of cable 2 10 is fitted with the inner wall of the sleeve 11 with a clearance. The adapter type is the same as cable 1 YJV type, 10-240mm. 2 The exposed length of the battery cell is 40-60mm, and the insertion depth of the sleeve is 30-50mm. The exposed section needs to be tinned with a tin layer thickness of 0.5-1mm to enhance the conductivity with screw 2. Sleeve 11 has at least two threaded holes, and screw 2 13 is threaded into the threaded holes. The end of screw 2 13 corresponds to the surface of the battery cell of cable 2 10. The inner wall of sleeve 11 has a groove 12 corresponding to screw 2 13, located at the corresponding inner wall position of screw 2. The cross-section is an inverted trapezoid with an upper base of 2mm, a lower base of 4mm, and a depth of 2mm. It is aligned with the axis of screw 2 to ensure that the battery cell can be inserted and form a mechanical lock after deformation.

[0043] After assembly, the coaxiality of the fixed sleeve 3 and the connecting sleeve 14 is ≤0.1mm; after the screw 6 passes through the connecting sleeve 14, its end is in close contact with the outer wall of the connecting sleeve 14 with a contact area ≥80%; after the pull rod 5 passes through the hole, the lengths of the two ends extending out of the screw 13 are equal with an error ≤±1mm, and after being locked by the nut, the pull rod 5 does not move axially.

[0044] A connecting sleeve 14 is fixedly connected to the side of the sleeve 11 corresponding to the fixed sleeve 3. The connecting sleeve 14 and the inner wall of the fixed sleeve 3 are clearance-fitted. A screw 6 passes through the connecting sleeve 14. The screw size is M6-M10 and is adapted to the size of the fixed sleeve. The material is 304 stainless steel with a tensile strength of ≥520MPa. The internal hexagon head has a flatness of 10-17mm and a thread precision of 6g. The thread surface is coated with thread locking adhesive such as Loctite 243. The temperature resistance is -55℃ to 150℃ and the tightening torque is 15-25N·m.

[0045] The connecting sleeve 14, sleeve 11, and screw 13 are all provided with corresponding holes. The pull rod 5 passes through the screw 13 through the holes. The sleeve 11 and the connecting sleeve 14 are an integrated structure with a coaxiality of ≤0.05mm. The length of the connecting sleeve 14 is 30-50mm, and its end is flush with the end of the sleeve 11 with an error of ≤±0.5mm. The outer diameter of the connecting sleeve 14 is 0.03-0.08mm smaller than the inner diameter of the fixing sleeve 3. After being inserted into the fixing sleeve 3, the coaxiality of the two axes is ≤0.1mm.

[0046] Two cold-shrink tubing 8 are fitted on the surface of cable 12. The tubing is made of EPDM rubber and is 200-300mm long. It covers the connecting terminal assembly and the insulation layer of cable 2 by 100-150mm. The expansion rate is ≥200% and the shrinkage temperature is -10℃ to 40℃. The inner wall is pre-coated with a butyl rubber layer with a thickness of 0.5-1mm and a peel strength of ≥5N / cm at room temperature. The two ends are provided with sealing lips with a thickness of 1-2mm. After shrinkage, it fits tightly with the cable sheath. The two cold-shrink tubing 8 are respectively fitted on the surfaces of the two connecting terminal assemblies 9 and the two cables 22 10.

[0047] Using the above structure, the flexible connection component 1 is a prefabricated part, mainly consisting of cable 1 2 and two fixing sleeves 3. The fixing sleeves 3 are installed on the core of cable 1 2. The inside of the fixing sleeves 3 is filled with tin to improve the firmness of the connection between the fixing sleeves 3 and cable 1 2 and the stability of conductivity. The opposite ends of the two cables 2 10 that need to be connected are stripped, and the core is inserted into the sleeve 11 of the connecting terminal assembly 9. The screw 2 13 is rotated so that the screw 2 13 supports the core of cable 2 10 and causes the core to deform into the groove 12, so that cable 2 10 cannot be separated from the sleeve 11. The connecting sleeve 14 is inserted into the fixing sleeve 3, and the pull rod 5 is inserted into the screw 2 13. The screw 1 6 is rotated so that it passes through the connecting sleeve 14, thereby locking the fixing sleeve 3 and the connecting sleeve 14. The pull rod 5 can limit the screw 2 13 to prevent it from loosening.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A quick-prefabricated flexible connector for high-voltage cables, characterized in that: It includes a flexible connection assembly (1) and two connection terminal assemblies (9). The flexible connection assembly (1) includes a cable (2). Both ends of the cable (2) are fixedly connected to a fixing sleeve (3). Several fixing rings (7) are fixedly connected inside the fixing sleeve (3) and sleeved on the cable (2) core.

2. The high-voltage cable quick-prefabricated flexible connector according to claim 1, characterized in that: The fixing sleeve (3) is filled with tin.

3. The high-voltage cable quick-prefabrication flexible connector according to claim 2, characterized in that: A pull rod (5) is fixedly connected inside the fixed sleeve (3) along the length direction of the fixed sleeve (3).

4. The high-voltage cable quick-prefabrication flexible connector according to claim 3, characterized in that: The surface of the fixing sleeve (3) is fixedly connected with several annular rings (4).

5. The high-voltage cable quick-prefabrication flexible connector according to claim 4, characterized in that: The fixing sleeve (3) has at least two screw holes, and screws (6) are threaded into the screw holes.

6. The high-voltage cable quick-prefabricated flexible connector according to claim 5, characterized in that: The two connecting terminal assemblies (9) are respectively fixedly installed on two fixing sleeves (3), and a cable (10) is fixedly connected inside the connecting terminal assembly (9).

7. The high-voltage cable quick-prefabrication flexible connector according to claim 6, characterized in that: The connection terminal assembly (9) includes a sleeve (11), the core of the second cable (10) is clearance-fitted with the inner wall of the sleeve (11), the sleeve (11) has at least two threaded holes, and a screw (13) is threadedly connected in the threaded holes. The end of the screw (13) corresponds to the surface of the core of the second cable (10), and the inner wall of the sleeve (11) has a groove (12) corresponding to the screw (13).

8. The high-voltage cable quick-prefabrication flexible connector according to claim 7, characterized in that: A connecting sleeve (14) is fixedly connected to the side of the sleeve (11) corresponding to the fixed sleeve (3). The connecting sleeve (14) is clearance-fitted with the inner wall of the fixed sleeve (3), and the screw (6) passes through the connecting sleeve (14).

9. A high-voltage cable quick-prefabrication flexible connector according to claim 8, characterized in that: The connecting sleeve (14), sleeve (11) and screw two (13) are all provided with holes at their corresponding positions, and the pull rod (5) passes through the screw two (13) through the holes.

10. A high-voltage cable quick-prefabricated flexible connector according to claim 9, characterized in that: Two cold shrink sleeves (8) are fitted on the surface of the first cable (2), and the two cold shrink sleeves (8) are respectively fitted on the surfaces of the two connecting terminal assemblies (9) and the two second cables (10).

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