Rapidly-installed power cable joint

Abstract

The invention, which relates to the technical field of cable installation, discloses a rapidly-installed power cable joint comprising a joint body, a conductive contact and a conductive connecting piece. The connector body comprises a reinforced insulator, a semi-conductive stress cone, a connector insulation shield, a high-voltage shielding tube and a connector conductive piece, the high-voltage shielding tube is arranged in an inner cavity of the reinforced insulator, the connector conductive piece is embedded in the high-voltage shielding tube, and conductive mounting holes for mounting conductive contacts are formed in the two ends of the connector conductive piece respectively; the two conductive contacts are respectively connected with the end parts of the cable conductors at the two ends, and the outer surface of each conductive contact is provided with a mounting groove; the number of the conductive connecting pieces is two, the two conductive connecting pieces are installed in the corresponding installation grooves respectively, and in the installation state, the conductive connecting pieces achieve electrical connection between the connector conductive piece and the conductive contact. The cable joint has the advantages of low risk, short installation time, convenience in operation, low skill requirements on constructors and the like.

Description

Technical Field

[0001] The invention relates to a cable joint, in particular to a quick-installation power cable joint. Background Art

[0002] According to the statistical analysis of cable system failure cases of 110kV and above, cable joint failure accounts for as high as 50.87% of accessory failures, and cable joints are always the weakest link in causing accidents. The insulation structure of cable joints is relatively complex compared to the cable body, and it is very easy to cause defects and leave hidden dangers during production and on-site construction, so cable joints are still the focus of power supply companies.

[0003] The installation environment of cable joints is complex. Currently, conventional cable joint installation requires the joint to be installed on one end of the cable and then pulled back to the middle of the two connecting cables. The cable processing length is relatively long, the construction is difficult, the installation time is long, and the technical requirements for construction personnel are high. Moreover, during installation, when the polished outer shield of the cable contacts the reinforced insulation, there is a risk of reinforced insulation adhering to conductive particles, which poses a hidden danger to the safe operation of the cable joint. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems and provide a quick-installation power cable connector, which has the advantages of low risk, short installation time, convenient operation, and low skill requirements for construction personnel.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A quick-install power cable connector, comprising a connector body, a conductive contact and a conductive connector; the connector body comprises enhanced insulation, a semi-conductive stress cone, a connector insulation shield, a high-voltage shielding tube and a connector conductive part, the high-voltage shielding tube is arranged in an inner cavity of the enhanced insulation, the connector conductive part is embedded in the high-voltage shielding tube, and both ends of the connector conductive part are respectively provided with conductive mounting holes for mounting the conductive contacts; two conductive contacts are provided and are respectively connected to the end portions of the cable conductors at both ends, and the outer surface of each conductive contact is provided with a mounting groove; two conductive connectors are provided and are respectively installed in the corresponding mounting grooves, and in the installed state, the conductive connector realizes electrical connection between the connector conductive part and the conductive contact.

[0007] In a preferred embodiment of the present invention, the conductive mounting hole is a structure that is small inside and large outside, and includes a first hole position with a larger size and a second hole position with a smaller size; the conductive contact includes a first mounting portion and a second mounting portion, the first mounting portion is located in the first hole position, and the second mounting portion is located in the second hole position;

[0008] A positioning surface for positioning the first mounting portion is provided between the first hole and the second hole, so that the conductive contact can be positioned during installation to prevent the cable from being inserted too long into the connector body, causing the stress cone to overlap and misalign with the cable insulation shield.

[0009] Furthermore, the first mounting portion is fixedly connected to the end of the cable conductor, and the second mounting portion is provided with the mounting groove.

[0010] Furthermore, the first mounting portion and the second mounting portion are both provided with chamfer structures, and the edges of the chamfer structures are provided with rounded structures, so that they can be used as guide heads during installation without the need for an additional installation guide head, and the joint body will not be scratched.

[0011] Furthermore, the conductive contact is fixedly connected to the connector conductive part via a locking structure, which includes a locking block, a locking drive assembly for driving the locking block to be inserted between the conductive contact and the connector conductive part, and a locking assembly for locking the power of the locking drive assembly.

[0012] Furthermore, an annular groove is provided on the inner wall of the second hole of the connector conductive member;

[0013] The conductive contact is provided with a sliding mounting hole and a locking hole;

[0014] In the non-installed state, one end of the locking block is located in the locking hole, and the other end of the locking block is located in the sliding mounting hole; in the installed state, one end of the locking block is located in the annular groove, and the other end of the locking block is located in the locking hole.

[0015] Furthermore, the locking drive assembly is arranged in the sliding mounting hole, and the locking drive assembly includes a locking drive spring and a locking drive block, the two ends of the locking drive spring are respectively pressed against the locking drive block and the hole wall of the sliding mounting hole, the locking drive block is provided with a first extrusion inclined surface, and the locking block is provided with a second extrusion inclined surface matching the first extrusion inclined surface.

[0016] Furthermore, a locking mounting hole and an avoidance hole are also provided on the conductive contact, and the locking assembly is arranged in the locking mounting hole, and the locking assembly includes a locking swinging piece and a locking elastic piece, and the locking swinging piece is rotatably connected in the locking mounting hole, with the rotation center as the boundary, an unlocking extrusion portion is provided at one end of the locking swinging piece, and a locking portion is provided at the other end of the locking swinging piece; a locking groove cooperating with the locking portion is provided on the locking drive block; in a locked state, one end of the unlocking extrusion portion extends through the avoidance hole to the outside of the side surface of the first mounting portion corresponding to the positioning surface, and one end of the locking portion extends into the locking groove; both ends of the locking elastic piece are tightly pressed between the hole wall of the locking mounting hole and the locking swinging piece.

[0017] When the locking cam is in contact with the locking member, the locking member is released, and the locking member is locked in place, so that the locking member is locked in place and the locking member is locked.

[0018] Furthermore, the locking drive block is also provided with a support plane for supporting the locking block, and the support plane is located on the top of the first extrusion inclined surface. In this way, when the locking block enters the annular slot, the locking drive block on the support plane provides position-limiting support for the locking block to prevent the locking block from automatically exiting the annular slot, thereby stably connecting the cable and the connector.

[0019] Furthermore, the conductive contact is also provided with a spring mounting hole, in which an anti-drop spring is provided, and the two ends of the anti-drop spring are respectively pressed against the inner bottom surface of the spring mounting hole and the side surface of the locking block. In this way, when the locking block is located at the bottom, the anti-drop spring can elastically restrict the locking block in the locking hole to prevent the locking block from falling down.

[0020] Furthermore, the locking structures are provided with at least two groups and are evenly arranged along the circumferential direction.

[0021] In a preferred embodiment of the present invention, there is a clearance fit between the conductive contact and the connector conductive member.

[0022] Furthermore, the conductive connector is a hollow elastic structure, and in a non-installed state, the outer diameter of the conductive connector is larger than the inner diameter of the second hole. With the above structure, when the conductive contact is inserted into the conductive mounting hole of the connector conductive part, the conductive connector will adaptively fit according to the hole wall of the conductive mounting hole, so that the conductive contact and the connector conductive part are fully conductive, thereby ensuring smooth power transmission.

[0023] In a preferred embodiment of the present invention, the installation groove and the conductive connecting piece are both annular structures, so that conduction can be achieved in the entire circumferential direction, thereby increasing the conduction area.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention adopts a quick installation structure, which does not require the connector to be installed on the long-end cable, does not cause the semi-conductive material of the cable to enter the connector, reduces the occurrence of connector failures, and improves connector reliability.

[0026] 2. The cable stripping length of the present invention is short, which saves cable processing time and reduces cable waste.

[0027] 3. The scheme of the present invention is reasonable, the structure is simple, it is easy to implement, the construction difficulty is small, the technical level requirements of the construction personnel are low, and the installation failure rate can be reduced and the installation efficiency can be improved.

[0028] 4. When replacing the cable connector, the present invention can reuse the original cable without the need to pre-treat the cable again, thus saving installation time and improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view of the quick installation power cable connector of the present invention.

[0030] Figure 2-Figure 4 It is a cross-sectional view of the quick installation power cable connector and the cable installation process of the present invention.

[0031] Figure 5 It is a partial cross-sectional view of the conductive contact, locking structure and connector conductive member of the present invention.

[0032] Figure 6 for Figure 5 Magnified view of the X in .

[0033] Figure 7 for Figure 6 Another state diagram of .

[0034] Figure 8 It is a front view of a semi-cylinder of a conductive contact of the present invention. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0036] See also Figure 1-Figure 4 The quick-install power cable connector of this embodiment includes a connector body, a conductive contact 1 and a conductive connector 2; the connector body includes enhanced insulation 3, a connector conductive part 4, a stress cone 5, a high-voltage shielding tube 6 and a connector insulating shield 7, and the enhanced insulation 3, the connector conductive part 4, the stress cone 5, the high-voltage shielding tube 6 and the connector insulating shield 7 are integrally formed.

[0037] Specifically, the cable includes a cable conductor 8 , a cable insulation 9 , a cable insulation shield 10 , a cable metal sheath 11 and a cable outer sheath 12 .

[0038] See also Figure 1-Figure 4 The joint conductive part 4 is embedded in the inner hole of the high-voltage shielding tube 6, and conductive mounting holes for mounting the conductive contact 1 are respectively provided at both ends of the joint conductive part 4; the conductive contacts 1 are provided with two and are respectively connected to the ends of the cable conductors 8 at both ends, and the outer surface of each conductive contact 1 is provided with a mounting groove 1-1; the conductive connecting parts 2 are provided with two and are respectively installed in the corresponding mounting grooves 1-1. In the installed state, the conductive connecting parts 2 realize the electrical connection between the joint conductive part 4 and the conductive contact 1.

[0039] See also Figure 1-Figure 4 The conductive mounting hole is a structure that is small inside and large outside, and the structure includes a first hole position 4-1 with a larger size and a second hole position 4-2 with a smaller size; the conductive contact 1 includes a first mounting portion and a second mounting portion, the first mounting portion is located in the first hole position 4-1, and the second mounting portion is located in the second hole position 4-2; a positioning surface 4-3 for positioning the first mounting portion is provided between the first hole position 4-1 and the second hole position 4-2. In this way, the conductive contact 1 can be positioned during installation to prevent the cable from being inserted too long into the connector body, causing the stress cone 5 to overlap and misalign with the cable insulation shield 10.

[0040] Furthermore, the first mounting portion is fixedly connected to the end of the cable conductor 8, and the second mounting portion is provided with the mounting groove 1-1.

[0041] Furthermore, the first mounting portion and the second mounting portion are both provided with chamfer structures, and the edges of the chamfer structures are provided with rounded structures, so that they can be used as guide heads during installation without the need for an additional installation guide head, and the joint body will not be scratched.

[0042] See also Figure 5-Figure 8 The conductive contact 1 is fixedly connected to the connector conductive part 4 through a locking structure, and the locking structure is provided with at least two groups and is evenly arranged along the circumferential direction; each group of locking structures includes a locking block 13, a locking drive component for driving the locking block 13 to be inserted between the conductive contact 1 and the connector conductive part 4, and a locking component for locking the power of the locking drive component.

[0043] Furthermore, an annular groove 4-4 is provided on the inner wall of the second hole 4-2 of the connector conductive member 4; a sliding mounting hole 1-2 and a locking hole 1-3 are provided on the conductive contact 1; in a non-installed state, one end of the locking block 13 is located in the locking hole 1-3, and the other end of the locking block 13 is located in the sliding mounting hole 1-2; in an installed state, one end of the locking block 13 is located in the annular groove 4-4, and the other end of the locking block 13 is located in the locking hole 1-3. Specifically, the conductive contact 1 is formed by locking two semi-cylinders.

[0044] Furthermore, the locking drive assembly is arranged in the sliding mounting hole 1-2, and the locking drive assembly includes a locking drive spring 14 and a locking drive block 15. The two ends of the locking drive spring 14 are respectively pressed against the locking drive block 15 and the hole wall of the sliding mounting hole 1-2. The locking drive block 15 is provided with a first extrusion inclined surface, and the locking block 13 is provided with a second extrusion inclined surface that cooperates with the first extrusion inclined surface.

[0045] Furthermore, a locking mounting hole 1-4 and an avoidance hole 1-5 are also provided on the conductive contact 1, and the locking assembly is arranged in the locking mounting hole 1-4, and the locking assembly includes a locking swinging piece 16 and a locking elastic piece 17, and the locking swinging piece 16 is rotatably connected in the locking mounting hole 1-4, with the rotation center as the boundary, one end of the locking swinging piece 16 is provided with an unlocking extrusion portion 16-1, and the other end of the locking swinging piece 16 is provided with a locking portion 16-2; the locking drive block 15 is provided with a locking groove 15-1 that cooperates with the locking portion 16-2; in the locked state, one end of the unlocking extrusion portion 16-1 extends through the avoidance hole 1-5 to the outside of the side surface of the first mounting portion corresponding to the positioning surface 4-3, and one end of the locking portion 16-2 extends into the locking groove 15-1; the two ends of the locking elastic piece 17 are tightly pressed between the hole wall of the locking mounting hole 1-4 and the locking swinging piece 16.

[0046] Through the above structure, in the process of inserting the conductive contact 1 into the conductive mounting hole, the unlocking extrusion portion 16-1 of the locking swing member 16 gradually approaches the positioning surface 4-3 of the connector conductive member 4. When the unlocking extrusion portion 16-1 of the locking swing member 16 contacts the positioning surface 4-3 of the connector conductive member 4, the positioning surface 4-3 will squeeze the unlocking extrusion portion 16-1 of the locking swing member 16 backwards. At this time, the locking swing member 16 swings, so that the locking portion 16-2 of the locking swing member 16 comes out of the locking groove 15-1 of the locking drive block 15, and the locking of the locking drive block 15 is released. At this time, the locking hole 1-3 of the conductive contact 1 is just connected with the annular groove 4-4 of the connector conductive member 4; the locking drive spring 14 instantly releases potential energy, pushes the locking drive block 15 to move forward, and drives the locking block 13 to move away from the sliding mounting hole 1-2 through the first extrusion inclined surface of the locking drive block 15, so that one end of the locking block 13 is inserted into the annular groove 4-4 of the connector conductive member 4, as shown in FIG. Figure 7 , thereby completing the locking operation and fixing the cable and the connector so that they will not loosen easily.

[0047] Furthermore, the locking drive block 15 is also provided with a support plane for supporting the locking block 13, and the support plane is located at the top of the first extrusion inclined surface. In this way, when the locking block 13 enters the annular groove 4-4, the locking drive block 15 of the support plane provides limited support for the locking block 13 to prevent the locking block 13 from automatically withdrawing from the annular groove 4-4, so that the cable and the connector can be stably connected together.

[0048] Furthermore, the conductive contact 1 is provided with a spring mounting hole 1-6, in which an anti-drop spring 18 is provided, and the two ends of the anti-drop spring 18 are respectively pressed against the inner bottom surface of the spring mounting hole 1-6 and the side surface of the locking block 13. In this way, when the locking block 13 is located at the bottom, the anti-drop spring 18 can elastically restrict the locking block 13 in the locking hole 1-3 to prevent the locking block 13 from falling down.

[0049] Furthermore, there is a clearance fit between the conductive contact 1 and the joint conductive member 4 .

[0050] Furthermore, the conductive connector 2 is a hollow elastic structure, and in the non-installed state, the outer diameter of the conductive connector 2 is larger than the inner diameter of the second hole 4-2. With the above structure, when the conductive contact 1 is inserted into the conductive mounting hole of the connector conductive member 4, the conductive connector 2 will adaptively fit according to the hole wall of the conductive mounting hole, so that the conductive contact 1 and the connector conductive member 4 are fully conductive, thereby ensuring smooth power transmission.

[0051] Furthermore, the installation groove 1 - 1 and the conductive connector 2 are both annular structures, so that conduction can be achieved in the entire circumferential direction, thereby increasing the conduction area.

[0052] See also Figure 1-Figure 4 The working principle of the quick installation power cable connector of this embodiment is:

[0053] During installation, the conductive contact 1 is connected to the cable as a whole by crimping or screw locking, etc., to ensure that the contact resistance is not higher than the body resistance of the cable conductor 8.

[0054] First, insert the cable with the conductive contact 1 installed at one end into the connector body. When the positioning surface 4-3 on the conductive contact 1 contacts the connector conductive part 4 in the high-voltage shielding tube 6, the cable is in place, and then insert the cable installed at the other end into the connector body. It is not necessary to install the connector body on the cable with a stripping length greater than the connector body length. After the cable conductors 8 at both ends are connected, pull the connector body back to the connection center of the cable conductors 8. Therefore, shorter cables can be stripped, saving the cable stripping length and shortening the cable processing time; at the same time, the length of the cable inserted into the connector body is only half of the length of the connector body, which not only greatly reduces the risk of the connector being punctured by the conductive particles on the outer shield of the cable, but also has a small total friction resistance for installation, making installation convenient and fast.

[0055] The cables at both ends are connected to the joint conductive part 4 in the high-voltage shielding tube 6 through the conductive connector 2 on the conductive contact 1 (one side of the conductive connector 2 contacts the conductive contact 1, and the other side contacts the joint conductive part 4), thereby realizing electrical connection of the cables at both ends.

[0056] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A quick installation power cable connector, characterized in that: It includes a connector body, a conductive contact and a conductive connector; the connector body includes enhanced insulation, a semi-conductive stress cone, a connector insulation shield, a high-voltage shielding tube and a connector conductive part, the high-voltage shielding tube is arranged in the inner cavity of the enhanced insulation, the connector conductive part is embedded in the high-voltage shielding tube, and both ends of the connector conductive part are respectively provided with conductive mounting holes for installing the conductive contacts; two conductive contacts are provided and are respectively connected to the end parts of the cable conductors at both ends, and the outer surface of each conductive contact is provided with a mounting groove; two conductive connectors are provided and are respectively installed in the corresponding mounting grooves, and in the installed state, the conductive connector realizes electrical connection between the connector conductive part and the conductive contact.

2. The quick installation power cable connector according to claim 1, characterized in that: The conductive mounting hole is a structure that is small inside and large outside, and the structure includes a first hole position with a larger size and a second hole position with a smaller size; the conductive contact includes a first mounting portion and a second mounting portion, the first mounting portion is located in the first hole position, and the second mounting portion is located in the second hole position; A positioning surface for positioning the first mounting portion is provided between the first hole position and the second hole position; The first mounting portion is fixedly connected to the end of the cable conductor, and the second mounting portion is provided with the mounting groove.

3. The quick installation power cable connector according to claim 1, characterized in that: The conductive contact is fixedly connected to the connector conductive member via a locking structure, which includes a locking block, a locking drive assembly for driving the locking block to be inserted between the conductive contact and the connector conductive member, and a locking assembly for locking the power of the locking drive assembly.

4. The quick installation power cable connector according to claim 3, characterized in that: An annular groove is provided on the inner wall of the second hole of the connector conductive member; The conductive contact is provided with a sliding mounting hole and a locking hole; In the non-installed state, one end of the locking block is located in the locking hole, and the other end of the locking block is located in the sliding mounting hole; in the installed state, one end of the locking block is located in the annular groove, and the other end of the locking block is located in the locking hole.

5. The quick installation power cable connector according to claim 4, characterized in that: The locking drive assembly is arranged in the sliding mounting hole, and the locking drive assembly includes a locking drive spring and a locking drive block. The two ends of the locking drive spring are respectively pressed against the locking drive block and the hole wall of the sliding mounting hole. The locking drive block is provided with a first extrusion inclined surface, and the locking block is provided with a second extrusion inclined surface that cooperates with the first extrusion inclined surface.

6. The quick installation power cable connector according to claim 5, characterized in that: The conductive contact is also provided with a locking mounting hole and an avoidance hole, and the locking assembly is arranged in the locking mounting hole, and the locking assembly includes a locking swinging piece and a locking elastic piece, and the locking swinging piece is rotatably connected in the locking mounting hole, with the rotation center as the boundary, one end of the locking swinging piece is provided with an unlocking extrusion part, and the other end of the locking swinging piece is provided with a locking part; the locking drive block is provided with a locking groove that cooperates with the locking part; in the locked state, one end of the unlocking extrusion part extends through the avoidance hole to the outside of the side surface of the first mounting part corresponding to the positioning surface, and one end of the locking part extends into the locking groove; the two ends of the locking elastic piece are tightly pressed between the hole wall of the locking mounting hole and the locking swinging piece.

7. The quick installation power cable connector according to claim 5, characterized in that: The locking drive block is also provided with a supporting plane for supporting the locking block, and the supporting plane is located on the top of the first extrusion inclined surface.

8. The quick installation power cable connector according to claim 3, characterized in that: The conductive contact is also provided with a spring mounting hole, in which an anti-drop spring is arranged, and two ends of the anti-drop spring are respectively pressed against the inner bottom surface of the spring mounting hole and the side surface of the locking block.

9. The quick installation power cable connector according to claim 1, characterized in that: The conductive contact and the joint conductive member are clearance-fitted; the conductive connector is a hollow elastic structure, and in a non-installed state, the outer diameter of the conductive connector is larger than the inner diameter of the second hole.

10. The quick installation power cable connector according to claim 1, characterized in that: The installation groove and the conductive connecting piece are both annular structures.

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