Long-life power distribution cable joint

Abstract

The invention discloses a long-service-life power distribution cable connector which comprises a shielding protection shell, a connecting pipe, an inner-layer sealing assembly, a middle-layer sealing assembly and a port sealing assembly. A first wire inlet and a second wire inlet which are opposite to each other are formed in the shielding protection shell, the connecting pipe, the inner-layer sealing assembly and the middle-layer sealing assembly are located in the shielding protection shell, and the two ends of the connecting pipe are used for being electrically connected with a first cable and a second cable respectively; the inner-layer sealing assembly clings to and surrounds the connecting pipe, the joint of the connecting pipe and the first cable and the joint of the connecting pipe and the second cable at the same time, the middle-layer sealing assembly is arranged around the inner-layer sealing assembly, and the middle-layer sealing assembly is connected with the inward end of the first cable inlet and the inward end of the second cable inlet; the first wire inlet and the second wire inlet are respectively provided with a port sealing assembly. A multi-layer and multi-point sealing structure is formed, the sealing performance of the cable connector is improved, the service life of the cable is prolonged, and the power maintenance operation pressure is reduced.

Description

Technical Field

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

[0002] As an important part of urban and industrial power supply, the power distribution system undertakes a large number of power transmission tasks. In the huge power supply network, cables are everywhere; the cable connection is the weakest point. After long-term use, it is very easy to be corroded and damaged under the influence of external factors, which leads to the degradation of the external insulation performance of the connection, affecting the service life of the cable and the stability of power supply.

[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 cable connector to 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 protection 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 in the shielding protection 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 component is simultaneously attached to and surrounded by 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 component is arranged around the inner sealing component, and the middle sealing component 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 the shell, and then arranging 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, anti-damage and other performances 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 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 of the present invention;

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

[0014] Description of labels:

[0015] 1. Shielding protection shell; 2. Connecting tube; 3. First cable; 4. Second cable; 5. Elastic band; 6. Optical fiber 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] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

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

[0021] The shielding protection 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 protection shell 1, and 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 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 component is arranged around the inner sealing component, and the middle sealing component is respectively connected to the inward end of the first inlet and the inward end of the second inlet;

[0023] 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 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 then a double-layer sealing structure composed 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] Further, 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 , and 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 angular surfaces of the connecting tube 2 after crimping, 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, and the field strength concentration phenomenon that occurs, 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 disposed 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] Further, 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 wire inlet and is used to connect the first cable 3, and the second inner sheath 62 is disposed through the second wire inlet and is used to connect the second cable 4;

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

[0036] The second sealing member 64 is disposed between the wrapping layer 63 and one end of the first inner jacket 61 facing the inside of the shielding shell 1 , and between the wrapping layer 63 and one end of the second inner jacket 62 facing the inside 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 layer sealing assembly also includes a waterproof layer 65;

[0039] The waterproof layer 65 is disposed on the wrapping layer 63 and the second sealing member 64 at the same time.

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

[0041] Further, the middle layer sealing assembly also includes a copper mesh 66;

[0042] The copper mesh 66 is disposed between the wrapping layer 63 and the inner sealing assembly, and the copper mesh 66 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] Further, 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 inside of the shielding shell 1 and one end of the second inner sheath 62 facing the inside of the shielding shell 1 .

[0046] From the above description, it can be seen that 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 line inlet position.

[0047] Further, 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 protection shell 1 are fixedly sealed with the cable sheath by lead seals 73 to form mechanical and electrical connections, and 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 a portion of the first cable 3 in the shielding and protective shell 1 or a 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 the optical fiber joint box 6 to connect the optical fibers connected by the first line inlet and the second line inlet, it is helpful to expand the functions such as monitoring key parameters such as humidity and temperature at the joint 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 protection shell 1, a connecting tube 2, an inner layer sealing assembly, a middle layer sealing assembly and a port sealing assembly; the shielding protection shell 1 is provided with a first and a second relative line inlet, the connecting tube 2, the inner layer sealing assembly and the middle layer sealing assembly are located in the shielding protection shell 1, and the two ends of the connecting tube 2 are respectively used to electrically connect a first cable 3 connected from the first line inlet and a second cable 4 connected from the second line inlet; the inner layer 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 layer sealing assembly is arranged around the inner layer sealing assembly, and the middle layer sealing assembly is respectively connected to an inward end of the first line inlet and an inward end of the second line inlet; a port sealing assembly is provided on an outward end of the first line inlet and an outward end of the second line inlet, and the two port sealing assemblies respectively block the gap between the first line inlet and the first cable 3 and the gap between the second line inlet and the second cable 4.

[0059] In this embodiment, if Figure 2 As shown, the shielding and protective housing 1 preferably uses an aluminum alloy housing. In other equivalent embodiments, a shielding housing made of other metal materials such as stainless steel may also be used; the connecting pipe 2 preferably uses a copper pipe. Before connection, an elastic band 5 may be used to bind the portion of the first cable 3 in the shielding and protective housing 1 or the portion of the second cable 4 in the shielding and protective housing 1, so that the connection portion is more compact and convenient for the subsequent installation of an inner sealing component. At the same time, in order to meet the internal wiring requirements, the optical fiber splice box 6 is located in the shielding and protective housing 1, and the first and second inlet ports can also be used to access optical fibers.

[0060] In this embodiment, if Figure 1As shown, the inner sealing component includes a heat-resistant sealant 51, a semi-conductive tape 52, an insulating member 53 and a first sealing member 54; both ends of the connecting tube 2 are provided with a 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; the semi-conductive tape 52 is simultaneously tightly attached to and surrounded by the connecting tube 2 and the heat-resistant sealant 51, and 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 simultaneously tightly attached to and surrounded by 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 provided on one end of the insulating member 53 abutting against the first cable 3 and the other end of the insulating member 53 abutting against the second cable 4. Among them, the insulating member 53 is preferably an insulating rubber member, and the first sealing member 54 can be selected to glue and fix the insulating member 53 on the first cable 3 and the second cable 4 with a waterproof sealing tape.

[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 to 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 to pass through the first wire inlet and is used to connect the first cable 3, and the second inner sheath 62 is arranged to pass 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, one end of the first inner sheath 61 facing the inside of the shielding protective shell 1 and one end of the second inner sheath 62 facing the inside of the shielding protective shell 1; a second sealing member 64 is provided between the wrapping layer 63 and one end of the first inner sheath 61 facing the inside of the shielding protective shell 1 and between the wrapping layer 63 and one end of the second inner sheath 62 facing the inside 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 the 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 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; the other end of the first heat shrink tube 71 and the other end of the second heat shrink tube 72 are respectively used to connect the first cable 3 and the second cable 4. The first heat shrink tube 71 and the second heat shrink tube 72 can be adaptively designed according to the size of the first wire inlet and the second wire inlet, and a sealing tape heat shrink tube is selected.

[0066] To sum up, the present invention provides a long-life distribution cable connector, which takes 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 assembly and a middle sealing assembly inside the shell, and then arranges a port sealing assembly 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 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 specification 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 protection shell, a connecting pipe, an inner sealing component, a middle sealing component and a port sealing component; The shielding protection 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 in the shielding protection 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 component is simultaneously attached to and surrounded by 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 component is arranged around the inner sealing component, and the middle sealing component 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 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.

2. A long-life cable connector according to claim 1, characterized in that: The inner sealing component includes a heat-resistant sealant and a semi-conductive tape; Both ends of the connecting pipe are provided with the heat-resistant sealant, and the heat-resistant sealant is used to fill the gap between one end of the connecting pipe and the first cable and the gap between the other end of the connecting pipe and the second cable; The semi-conductive tape is simultaneously tightly attached to and surrounds 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.

3. A long-life distribution cable connector according to claim 2, characterized in that: The inner sealing assembly also includes an insulating member and a first sealing member; The insulating member simultaneously adheres to and surrounds the semi-conductive belt, 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 disposed on one end of the insulating member contacting the first cable and the other end of the insulating member contacting the second cable.

4. A long-life cable connector according to claim 1, characterized in that: 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 wire inlet and is used to connect the first cable, and the second inner sheath is disposed through the second wire inlet and is used to connect the second cable; The wrapping layer is simultaneously wound around the inner sealing component, one end of the first inner jacket facing the inside of the shielding protection shell, and one end of the second inner jacket facing the inside of the shielding protection shell; The second sealing member is disposed between the wrapping layer and one end of the first inner jacket facing the interior of the shielding protection shell, and between the wrapping layer and one end of the second inner jacket facing the interior of the shielding protection shell.

5. A long-life distribution cable connector according to claim 4, characterized in that: The middle layer sealing assembly also includes a waterproof layer; The waterproof layer is disposed around the wrapping layer and the second sealing member at the same time.

6. A long-life distribution cable connector according to claim 4, 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 the copper mesh is used for overlapping and wrapping the three-phase copper shielding layer of the first cable and the second cable.

7. A long-life distribution cable connector according to claim 4, characterized in that: The middle layer sealing assembly further comprises 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 inside of the shielding protection shell and on one end of the second inner sheath facing the inside of the shielding protection shell.

8. The long-life distribution cable connector according to claim 1, characterized in that: 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 connected to the outward end of the first wire inlet through a lead seal, and one end of the second heat shrink tube is connected to 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.

9. 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.

10. The long-life distribution cable connector according to claim 1, characterized in that: Also included is a fiber optic splice closure; The optical fiber splice box is located in the shielding protection shell, and the first line inlet and the second line inlet are used for connecting optical fibers.

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