Long life power distribution cable joint

Abstract

The application discloses a long-service-life power distribution cable joint which comprises a shielding protective shell, a connecting pipe, an inner layer sealing assembly, a middle layer sealing assembly and a port sealing assembly. The shielding protective shell is provided with opposite first and second wire inlet ports. The connecting pipe, the inner layer sealing assembly and the middle layer sealing assembly are located in the shielding protective shell. The two ends of the connecting pipe are used for electrically connecting first and second cables respectively. The inner layer sealing assembly is tightly attached to and surrounds the connecting pipe, the connecting pipe and the first cable and the connecting pipe and the second cable. The middle layer sealing assembly is arranged around the inner layer sealing assembly and is connected with the inward one end of the first wire inlet port and the inward one end of the second wire inlet port respectively. The first wire inlet port and the second wire inlet port are both provided with a port sealing assembly. The long-service-life power distribution cable joint forms a multi-layer and multi-point sealing structure, improves the sealing performance of the cable joint, prolongs the service life of the cable and reduces the pressure of power maintenance operation.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular designs a long-life cable connector. Background Art

[0002] As a crucial component of urban and industrial power supply, the power distribution system carries a significant amount of power transmission. Cables are ubiquitous in this vast power supply network, and cable connections are their most vulnerable points. Over extended use, they are susceptible to corrosion and damage from external factors, which in turn degrades the external insulation at these connections, impacting cable life and power supply stability.

[0003] To this end, the current practice is generally to dispatch operation and maintenance personnel to conduct regular inspections to ensure the normal operation of the power supply lines; however, the huge number of power supply lines and the crisscross distribution of cables make maintenance work difficult, costly, and inefficient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a long-life distribution cable connector, extend the service life of the cable, ensure long-term power supply stability, and reduce the pressure of power maintenance operations.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A long-life cable connector, comprising a shielding protection shell, a connecting pipe, an inner sealing component, a middle sealing component and a port sealing component;

[0007] The shielding protective shell is provided with a first wire inlet and a second wire inlet opposite to each other, the connecting pipe, the inner sealing assembly, and the middle sealing assembly are located inside the shielding protective shell, and the two ends of the connecting pipe are respectively used to electrically connect a first cable connected from the first wire inlet and a second cable connected from the second wire inlet;

[0008] The inner sealing assembly is simultaneously attached to and surrounds the connecting tube, the connection between the connecting tube and the first cable, and the connection between the connecting tube and the second cable. The middle sealing assembly is arranged around the inner sealing assembly and is respectively connected to an inward end of the first cable inlet and an inward end of the second cable inlet.

[0009] A port sealing assembly is provided on one outward end of the first wire inlet and one outward end of the second wire inlet, and the two port sealing assemblies respectively block the gap between the first wire inlet and the first cable and the gap between the second wire inlet and the second cable.

[0010] The beneficial effects of the present invention are: providing a long-life distribution cable connector, with a shielding protective shell as the protective body of the cable connection, and then arranging a double-layer sealing structure composed of an inner sealing component and a middle sealing component inside it, and then arranging port sealing components for the first incoming line port and the second incoming line port, thereby forming a multi-level, multi-point sealing structure, improving the waterproof and anti-damage performance of the cable connector part after connection, extending the service life of the cable, ensuring long-term power supply stability, and reducing the pressure of power maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a positional relationship diagram of a connecting pipe and an inner sealing component of a long-life cable connector of the present invention;

[0012] Figure 2 This is a schematic diagram of the internal structure of a long-life cable connector according to the present invention;

[0013] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0014] Description of labels:

[0015] 1. Shielding protective housing; 2. Connecting tube; 3. First cable; 4. Second cable; 5. Elastic band; 6. Fiber optic splice box;

[0016] 51. Heat-resistant sealant; 52. Semi-conductive tape; 53. Insulating member; 54. First sealing member;

[0017] 61. First inner sheath; 62. Second inner sheath; 63. Wrapping layer; 64. Second sealing member; 65. Waterproof layer; 66. Copper mesh; 67. Heat shrink sleeve;

[0018] 71. First heat shrink tube; 72. Second heat shrink tube; 73. Lead seal. DETAILED DESCRIPTION

[0019] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0020] Please refer to Figures 1 to 3 A long-life cable connector includes a shielding and protective shell 1, a connecting pipe 2, an inner sealing component, a middle sealing component and a port sealing component;

[0021] The shielding and protective shell 1 is provided with a first wire inlet and a second wire inlet opposite to each other. The connecting pipe 2, the inner sealing assembly, and the middle sealing assembly are located inside the shielding and protective shell 1. The two ends of the connecting pipe 2 are respectively used to electrically connect a first cable 3 connected from the first wire inlet and a second cable 4 connected from the second wire inlet.

[0022] The inner sealing component is simultaneously attached to and surrounds the connecting pipe 2, the connection between the connecting pipe 2 and the first cable 3, and the connection between the connecting pipe 2 and the second cable 4. The middle sealing component is arranged around the inner sealing component and is respectively connected to the inward end of the first cable inlet and the inward end of the second cable inlet;

[0023] A port sealing assembly is provided on the outward end of the first wire inlet and the outward end of the second wire inlet, and the two port sealing assemblies respectively block the gap between the first wire inlet and the first cable 3 and the gap between the second wire inlet and the second cable 4.

[0024] From the above description, it can be seen that the beneficial effects of the present invention are: the shielding protective shell 1 is used as the protective body of the cable connection, and a double-layer sealing structure consisting of an inner sealing component and a middle sealing is arranged inside it, and then a port sealing component is arranged for the first incoming line port and the second incoming line port, thereby forming a multi-level, multi-point sealing structure, improving the waterproof and anti-damage performance of the cable joint part after connection, extending the service life of the cable, ensuring long-term power supply stability, and reducing the pressure of power maintenance operations.

[0025] Furthermore, the inner sealing component includes a heat-resistant sealant 51 and a semi-conductive tape 52;

[0026] Both ends of the connecting tube 2 are provided with the heat-resistant sealant 51, and the heat-resistant sealant 51 is used to fill the gap between one end of the connecting tube 2 and the first cable 3 and the gap between the other end of the connecting tube 2 and the second cable 4;

[0027] The semi-conductive tape 52 is simultaneously tightly attached to and surrounded by the connecting tube 2 and the heat-resistant sealant 51 . The thickness of the semi-conductive tape 52 is equal to the difference between the cross-sectional radius of the connecting tube 2 and the cross-sectional radius of the first cable 3 or the second cable 4 .

[0028] From the above description, it can be seen that in the inner sealing component that needs to be in direct contact with the first cable 3, the second cable 4 and the connecting tube 2, a heat-resistant sealant 51 is used to fill the gap, and the surface of the connecting part is filled by wrapping a semi-conductive tape 52 on the connecting tube 2 and the heat-resistant sealant 51. This can effectively eliminate the sharp corners on the surface of the connecting tube 2 after crimping, and the deformation at the connection position caused by the outer diameter of the connecting tube 2 being smaller than the outer diameter of the cable, as well as the field strength concentration phenomenon, thereby improving the safety and stability of the cable connection.

[0029] Furthermore, the inner sealing assembly further includes an insulating member 53 and a first sealing member 54;

[0030] The insulating member 53 simultaneously adheres to and surrounds the semi-conductive belt 52 , the connection between the connecting tube 2 and the first cable 3 , and the connection between the connecting tube 2 and the second cable 4 ;

[0031] The first sealing member 54 is provided on one end of the insulating member 53 that contacts the first cable 3 and the other end of the insulating member 53 that contacts the second cable 4 .

[0032] From the above description, it can be seen that on the basis of applying the semi-conductive tape 52, by wrapping the insulating part 53, insulation protection is provided for the filled connection part, the insulation performance of the joint is improved, and the electric field strength is reduced. At the same time, the first sealing part 54 is used to seal the contact part between the insulating part 53 and the cable, thereby increasing the effective use time of the connection part.

[0033] Furthermore, the middle layer sealing assembly includes a first inner sheath 61, a second inner sheath 62, a wrapping layer 63 and a second sealing member 64;

[0034] The first inner sheath 61 is disposed through the first cable inlet and is used to connect the first cable 3 , and the second inner sheath 62 is disposed through the second cable inlet and is used to connect the second cable 4 ;

[0035] The wrapping layer 63 is simultaneously wound around the inner sealing assembly, the end of the first inner jacket 61 facing the interior of the shielding protective shell 1, and the end of the second inner jacket 62 facing the interior of the shielding protective shell 1;

[0036] The second sealing member 64 is provided between the wrapping layer 63 and the end of the first inner jacket 61 facing the interior of the shielding shell 1 , and between the wrapping layer 63 and the end of the second inner jacket 62 facing the interior of the shielding shell 1 .

[0037] From the above description, it can be seen that the first inner sheath 61, the second inner sheath 62, the wrapping layer 63 and the second seal 64 are used in combination to form an overall protection for components including the inner sealing assembly, the connecting pipe 2, etc., to avoid internal damage and extend the service life.

[0038] Furthermore, the middle sealing assembly further includes a waterproof layer 65;

[0039] The waterproof layer 65 is disposed around the wrapping layer 63 and the second sealing member 64 .

[0040] As can be seen from the above description, by providing the waterproof layer 65, water is prevented from intruding into the interior of the connector, thereby ensuring wiring safety.

[0041] Furthermore, the middle layer sealing assembly further includes a copper mesh 66;

[0042] The copper mesh 66 is disposed between the wrapping layer 63 and the inner sealing assembly, and is used for overlapping and wrapping the three-phase copper shielding layers of the first cable 3 and the second cable 4 .

[0043] From the above description, it can be seen that the copper mesh 66 is half-lapped and wrapped between the three-phase copper shielding layers of the cables at both ends to restore the connection between the copper shielding layers and improve the flow of the metal shielding layer of the joint.

[0044] Furthermore, the middle layer sealing assembly further includes a heat shrink sleeve 67 for binding the first cable 3 or the second cable 4;

[0045] The heat shrink sleeve 67 is sleeved on one end of the first inner sheath 61 facing the interior of the shielding shell 1 and the other end of the second inner sheath 62 facing the interior of the shielding shell 1 .

[0046] As can be seen from the above description, the internally arranged heat shrink sleeve 67 cooperates with the first inner sheath 61 and the second inner sheath 62 to effectively improve the protection performance of the cable inlet position.

[0047] Furthermore, the port sealing assembly includes a first heat shrink tube 71 and a second heat shrink tube 72;

[0048] One end of the first heat shrink tube 71 is sleeved on the outward end of the first wire inlet through a lead seal 73, and one end of the second heat shrink tube 72 is sleeved on the outward end of the second wire inlet through a lead seal 73;

[0049] The other end of the first heat shrink tube 71 and the other end of the second heat shrink tube 72 are used to connect to the first cable 3 and the second cable 4 respectively.

[0050] From the above description, it can be seen that the two wire inlets of the shielding protective shell 1 are fixedly sealed with the cable sheath by lead seals 73 to form mechanical and electrical connections. At the same time, a heat shrink tube is provided to enhance the sealing and waterproof performance.

[0051] Furthermore, an elastic band 5 is included;

[0052] The elastic band 5 is located in the shielding and protective shell 1 , and is used to bind the portion of the first cable 3 in the shielding and protective shell 1 or the portion of the second cable 4 in the shielding and protective shell 1 .

[0053] From the above description, it can be seen that the elastic band 5 is used to close and fix the cables, so as to improve the compactness of the internal structure of the connector, make the sealing protection more convenient, and make the internal structure more stable.

[0054] Furthermore, it also includes an optical fiber splice box 6;

[0055] The optical fiber splice box 6 is located in the shielding protection shell 1, and the first line inlet and the second line inlet are used for connecting optical fibers.

[0056] From the above description, it can be seen that by setting up an optical fiber splice box 6 to connect the optical fibers connected by the first line inlet and the second line inlet, it is helpful to expand the function of monitoring key parameters such as humidity and temperature at the splice position, bringing convenience to line operation and maintenance work.

[0057] Please refer to Figures 1 to 3 , embodiment 1 of the present invention is:

[0058] A long-life distribution cable connector, comprising a shielding protective shell 1, a connecting tube 2, an inner sealing assembly, a middle sealing assembly and a port sealing assembly; the shielding protective shell 1 is provided with a first wire inlet and a second wire inlet relative to each other, the connecting tube 2, the inner sealing assembly and the middle sealing assembly are located inside the shielding protective shell 1, and the two ends of the connecting tube 2 are respectively used to electrically connect a first cable 3 accessed from the first wire inlet and a second cable 4 accessed from the second wire inlet; the inner sealing assembly is simultaneously tightly attached to and surrounded by the connecting tube 2, the connection between the connecting tube 2 and the first cable 3, and the connection between the connecting tube 2 and the second cable 4, the middle sealing assembly is arranged around the inner sealing assembly, and the middle sealing assembly is respectively connected to the inward end of the first wire inlet and the inward end of the second wire inlet; a port sealing assembly is provided on the outward end of the first wire inlet and the outward end of the second wire inlet, and the two port sealing assemblies respectively block the gap between the first wire inlet and the first cable 3 and the gap between the second wire inlet and the second cable 4.

[0059] In this embodiment, if Figure 2 As shown, the shielding housing 1 is preferably constructed of an aluminum alloy. In other equivalent embodiments, shielding housings made of other metal materials, such as stainless steel, may also be used. The connecting tube 2 is preferably a copper tube. Prior to connection, an elastic band 5 can be used to confine the portion of the first cable 3 within the shielding housing 1 or the portion of the second cable 4 within the shielding housing 1, making the connection more compact and facilitating the subsequent installation of an inner sealing assembly. Furthermore, to meet internal wiring requirements, a fiber optic splice closure 6 is located within the shielding housing 1, and the first and second cable inlets can also be used to connect optical fibers.

[0060] In this embodiment, if Figure 1As shown, the inner sealing assembly includes a heat-resistant sealant 51, a semi-conductive tape 52, an insulating member 53, and a first sealing member 54. Heat-resistant sealant 51 is applied to both ends of the connecting tube 2, filling the gap between one end of the connecting tube 2 and the first cable 3, and the gap between the other end of the connecting tube 2 and the second cable 4. The semi-conductive tape 52 is tightly attached to and surrounds both the connecting tube 2 and the heat-resistant sealant 51. The thickness of the semi-conductive tape 52 is equal to the difference between the cross-sectional radius of the connecting tube 2 and the cross-sectional radius of the first cable 3 or the second cable 4. The insulating member 53 is tightly attached to and surrounds the semi-conductive tape 52, the connection between the connecting tube 2 and the first cable 3, and the connection between the connecting tube 2 and the second cable 4. The first sealing member 54 is applied to both the end of the insulating member 53 that contacts the first cable 3 and the other end of the insulating member 53 that contacts the second cable 4. The insulating member 53 is preferably made of insulating rubber, while the first sealing member 54 can be made of waterproof sealing tape to secure the insulating member 53 to the first cable 3 and the second cable 4.

[0061] After installing the inner sealing assembly, half-overlap copper mesh 66 is wrapped between the three-phase copper shielding layers of the first cable 3 and the second cable 4 to restore the connection between the copper shielding layers. At the same time, a copper braided wire connection is added between the copper shielding layers of the first cable 3 and the second cable 4, and a constant force spring is used to fix the copper braided wire on the copper shielding layer of the cable to ensure firm contact and prevent loosening.

[0062] In this embodiment, the middle layer sealing assembly includes a first inner sheath 61, a second inner sheath 62, a wrapping layer 63 and a second sealing member 64; the first inner sheath 61 is arranged through the first wire inlet and is used to connect the first cable 3, and the second inner sheath 62 is arranged through the second wire inlet and is used to connect the second cable 4; the wrapping layer 63 is simultaneously wrapped around the inner layer sealing assembly, the end of the first inner sheath 61 facing the interior of the shielding protective shell 1 and the end of the second inner sheath 62 facing the interior of the shielding protective shell 1; a second sealing member 64 is provided between the wrapping layer 63 and the end of the first inner sheath 61 facing the interior of the shielding protective shell 1 and between the wrapping layer 63 and the end of the second inner sheath 62 facing the interior of the shielding protective shell 1.

[0063] In this embodiment, the wrapping layer 63 can be made of transparent PVC, wrapped around the first cable 3, the second cable 4 and the entire inner sealing assembly, and a waterproof layer 65 is added outside the wrapping layer 63; the second sealing member 64 can also be made of waterproof sealant.

[0064] like Figure 2 and Figure 3As shown, the middle layer sealing assembly also includes a heat shrink sleeve 67 for binding the first cable 3 or the second cable 4; the end of the first inner sheath 61 facing the inside of the shielding protective shell 1 and the end of the second inner sheath 62 facing the inside of the shielding protective shell 1 are both sleeved with a heat shrink sleeve 67.

[0065] like Figure 2 and Figure 3 As shown, the port sealing assembly includes a first heat shrink tube 71 and a second heat shrink tube 72. One end of the first heat shrink tube 71 is connected to the outward-facing end of the first cable inlet through a lead seal 73, and one end of the second heat shrink tube 72 is connected to the outward-facing end of the second cable inlet through a lead seal 73. The other ends of the first heat shrink tube 71 and the second heat shrink tube 72 are respectively used to connect to the first cable 3 and the second cable 4. The first and second heat shrink tubes 71 and 72 can be designed to adapt to the size of the first and second cable inlets, and are made of sealing tape heat shrink tubes.

[0066] To sum up, the present invention provides a long-life distribution cable connector, which uses a shielding protective shell as the protective body of the cable connection, and then arranges a double-layer sealing structure composed of an inner sealing component and a middle sealing component inside it, and then arranges a port sealing component for the first incoming line port and the second incoming line port, thereby forming a multi-level, multi-point sealing structure, improving the waterproof and anti-damage performance of the cable connector part after connection, extending the service life of the cable, ensuring long-term power supply stability, and reducing the pressure of power maintenance operations.

[0067] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A long-life cable connector, characterized in that: It includes a shielding protective shell, a connecting pipe, an inner sealing assembly, a middle sealing assembly and a port sealing assembly; The shielding protective shell is provided with a first wire inlet and a second wire inlet opposite to each other, the connecting pipe, the inner sealing assembly, and the middle sealing assembly are located inside the shielding protective shell, and the two ends of the connecting pipe are respectively used to electrically connect a first cable connected from the first wire inlet and a second cable connected from the second wire inlet; The inner sealing assembly is simultaneously attached to and surrounds the connecting tube, the connection between the connecting tube and the first cable, and the connection between the connecting tube and the second cable. The middle sealing assembly is arranged around the inner sealing assembly and is respectively connected to an inward end of the first cable inlet and an inward end of the second cable inlet. A port sealing assembly is provided on one outward end of the first cable inlet and one outward end of the second cable inlet, and the two port sealing assemblies respectively block the gap between the first cable inlet and the first cable and the gap between the second cable inlet and the second cable; The inner sealing component includes a heat-resistant sealant and a semi-conductive tape; Both ends of the connecting tube are provided with the heat-resistant sealant, and the heat-resistant sealant is used to fill the gap between one end of the connecting tube and the first cable and the gap between the other end of the connecting tube and the second cable; The semi-conductive tape is simultaneously tightly attached to and surrounding the connecting tube and the heat-resistant sealant, and the thickness of the semi-conductive tape is equal to the difference between the cross-sectional radius of the connecting tube and the cross-sectional radius of the first cable or the second cable; The middle layer sealing assembly includes a first inner sheath, a second inner sheath, a wrapping layer and a second sealing member; The first inner sheath is disposed through the first cable inlet and is used to connect the first cable, and the second inner sheath is disposed through the second cable inlet and is used to connect the second cable; The wrapping layer is simultaneously wound around the inner sealing assembly, one end of the first inner jacket facing the interior of the shielding protective shell, and one end of the second inner jacket facing the interior of the shielding protective shell; A second sealing member is provided between the wrapping layer and one end of the first inner jacket facing the interior of the shielding protective shell, and between the wrapping layer and one end of the second inner jacket facing the interior of the shielding protective shell; The port sealing assembly includes a first heat shrink tube and a second heat shrink tube; One end of the first heat shrink tube is sleeved on the outward end of the first wire inlet through a lead seal, and one end of the second heat shrink tube is sleeved on the outward end of the second wire inlet through a lead seal; The other end of the first heat shrink tube and the other end of the second heat shrink tube are used to connect to the first cable and the second cable respectively; Also included are fiber optic splice closures; The optical fiber splice box is located in the shielding and protective shell, and the first cable inlet and the second cable inlet are used for connecting optical fibers.

2. A long-life distribution cable connector according to claim 1, characterized in that: The inner sealing assembly further includes an insulating member and a first sealing member; The insulating member simultaneously adheres to and surrounds the semi-conductive tape, the connection between the connecting tube and the first cable, and the connection between the connecting tube and the second cable; The first sealing member is provided on one end of the insulating member contacting the first cable and the other end of the insulating member contacting the second cable.

3. The long-life distribution cable connector according to claim 1, characterized in that: The middle sealing assembly also includes a waterproof layer; The waterproof layer is simultaneously surrounded and arranged on the wrapping layer and the second sealing member.

4. The long-life distribution cable connector according to claim 1, characterized in that: The middle layer sealing assembly also includes a copper mesh; The copper mesh is arranged between the wrapping layer and the inner sealing component, and is used for overlapping and wrapping the three-phase copper shielding layers of the first cable and the second cable.

5. The long-life distribution cable connector according to claim 1, characterized in that: The middle layer sealing assembly further includes a heat shrink sleeve for restraining the first cable or the second cable; The heat shrink sleeve is sleeved on one end of the first inner sheath facing the interior of the shielding and protective shell and on one end of the second inner sheath facing the interior of the shielding and protective shell.

6. The long-life distribution cable connector according to claim 1, characterized in that: Also included are elastic drawstrings; The elastic band is located in the shielding and protective shell, and is used to bind a portion of the first cable in the shielding and protective shell or a portion of the second cable in the shielding and protective shell.

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