CN204481275U - The charged bridge piece of European cable branch box - Google Patents

Abstract

The utility model discloses a European-style cable branch box live lap joint, which comprises at least one butt joint and a lead joint, several continuous joints and a sealing joint, and the butt joints, lead joints and sealing joints are sequentially connected to form a branch connection member or Adjacent lead joints are connected by continuous joints and butt joints. The front end of the first lead joint is connected to the butt joint, and the rear end of the last lead joint is connected to the sealing joint to form a multi-branch connection member; each joint is an internal conductor and an external conductor. The integral part of the hard insulating sleeve is integrated. The connection ends of the internal conductors of each joint adopt a threaded connection structure. After the joints are connected, the inner conductors are connected as a whole, and the outside is insulated and sealed by a hard insulating sleeve. When connecting, the operator contacts are all hard insulators. The design of the continuous joint can realize the continuous expansion of multiple continuous joints and lead joints.

Description

European-style cable branch box live lap

technical field

The utility model relates to a European-style cable branch box connector, in particular to a European-style cable branch box live lap joint.

Background technique

The current European-style cable branch box uses the wall bushing as the connecting busbar, and then realizes cable branching or transfer through the connecting member connected with the wall bushing. However, at present, the metal conductors in the butt joints, lead joints and other joints of the connecting members are separate from the external insulator, and there are the following problems when connecting: (1) The connection between the conductor part and the external insulating part needs to be carried out one by one. It is cumbersome; (2) When connecting, the power must be cut off, and the live connection cannot be made, which will affect the reliability of power supply and cause economic losses.

Utility model content

The purpose of the utility model is to provide a European-style cable branch box live lap joint which is easy to operate and can connect branch wires live.

The utility model discloses a live lapping piece for a European-style cable branch box, which comprises at least one butt joint and a lead joint, several continuous joints and a sealing joint, and the butt joints, lead joints and sealing joints are sequentially connected to form a branch lap joint or Adjacent lead joints are connected by continuous joints and butt joints. The front end of the first lead joint is connected to the butt joint, and the rear end of the last lead joint is connected to the sealing joint to form a multi-branch lap joint; each joint is an internal conductor and The integral part of the external hard insulating sleeve is integrated. The connection ends of the internal conductors of each joint adopt a threaded connection structure. Connectors or continued connectors are sufficient.

The butt joint includes the inner conductor of the butt joint and the hard insulating sleeve of the butt joint. The inner conductor of the butt joint is an integral part of the front screw and the rear coil with opposite screw threads at both ends. The outer diameter of the coil section is larger than the outer diameter of the screw section. The diameter and the outer wall have outwardly protruding positioning rings; the front section of the hard insulating sleeve of the butt joint is a conical interrupter, the middle section is a wrench holding section, and the rear section is a hollow cylindrical section with an outer diameter smaller than the outer diameter of the small diameter end of the front section. There are connecting threads; the inner conductor of the butt joint extends into the conical arc extinguishing chamber with the screw section, and the rear end of the coil section is flush with the rear end of the hard insulating sleeve of the butt joint and is embedded in the axial center of the hard insulating sleeve of the butt joint. Radial movement.

The lead joint includes an inner conductor of the lead joint and a hard insulating sleeve of the lead joint. The inner conductor of the lead joint is an integral part of a front screw and a rear coil matched with the inner conductor of the butt joint, and the outer diameter of the coil section is larger than that of the screw. The outer diameter and outer wall of the section have an outwardly protruding positioning ring; the hard insulating sleeve of the lead wire joint is a T-shaped three-way sleeve, and the front section of the upper end sleeve is a cylindrical arc extinguishing chamber, and the inner wall of the cylindrical arc extinguishing chamber has the same The external thread of the outer wall of the rear section of the hard insulating sleeve of the butt joint matches the internal thread, and the upper side of the axial through hole in the upper end sleeve has a positioning groove for the positioning of the terminal; the outer wall of the lower sleeve of the T-shaped three-way sleeve has a grounding lead The connecting hole is connected with a hard insulating cover by threading at the lower end; the inner conductor of the lead joint extends into the cylindrical arc extinguishing chamber with a screw section and is embedded in the front of the positioning groove on the upper side of the axial through hole in the upper casing.

The continuous joint includes the internal conductor of the continuous joint and the hard insulating sleeve of the continuous joint. The internal conductor of the continuous joint is a screw section, a boss section, a straight bar section and a coil section from the front to the back. On the contrary, there is an outwardly protruding positioning ring on the straight rod section; the hard insulating sleeve of the continuous joint is tapered conical, the middle section of the outer wall is a wrench holding section, and the axial center of the hard insulating sleeve of the continuous joint has a shape corresponding to the inside The installation hole corresponding to the shape of the straight rod section of the conductor to the coil section, the boss section and the screw section of the internal conductor of the continuous joint are located outside the front end of the hard insulating sleeve of the continuous joint, and the front end of the hard insulating sleeve of the continuous joint corresponds to the boss section of the internal conductor There is a groove on the periphery of the outer diameter; the external thread of the screw section of the internal conductor of the continuous joint matches the internal thread of the internal conductor of the lead joint, and the internal thread of the coil tube section matches the external thread of the screw section of the internal conductor of the butt joint.

The sealing head includes the internal conductor of the sealing head and the hard insulating sleeve of the sealing head. The internal conductor of the sealing head is a screw section, a boss section and a straight bar section from front to back, and the outer wall of the straight bar section has an outwardly protruding positioning ring ; wherein the screw section is connected to the rear section of the inner conductor of the lead joint; the axial center of the rigid insulating sleeve of the sealing joint has a blind hole from the front end to the rear, and the rear end of the outer wall is a wrench clamping section, and the hard insulating sleeve of the sealing joint is insulated The front end of the sleeve has a groove corresponding to the outer diameter of the boss section of the inner conductor, and a rubber pad is embedded in the groove; Installed in a blind hole.

Preferably, the wrench clamping sections on the rigid insulating sleeve of the butt joint, the extension joint and the sealing joint are all in the shape of a hexagon.

The respective joints are matched with corresponding rubber pads when connected.

Each joint of the utility model is designed as an integrated integral part with the connecting conductor and the hard insulator, and each connecting conductor is embedded in the corresponding hard insulator, and the connecting points of each connecting conductor are all in the arc extinguishing chamber. When docking, the operator contacts are all hard insulators. After the joints are connected, all the connecting conductors are insulated and sealed, so the live working purpose of the utility model can be realized, and the operation is simple, reliable and safe. The design of the continuous joint can realize the continuous expansion of multiple continuous joints and lead joints, and improve the flexibility of branching. Created the first batch of live connection components of the cable branch box, live lap connection, removal of power supply, reducing the scope of power outages, and improving social and economic benefits.

In order to make the docking operation faster, a hexagonal insulating wrench holding section is provided on the outer wall of the hard insulating sleeve of the butt joint, the extension joint and the sealing joint.

In order to ensure the waterproof and moisture-proof performance of each joint after connection and prevent the loosening of each joint, rubber pads are provided between adjacent joints and between the butt joints and the butt sleeves of the cable branch box.

In order to improve the strength of the utility model to adapt to the transfer of branch wires with higher voltage levels, screw connections are used between the internal conductors of the butt joint and the lead joint and the hard insulating sleeve; The conductor can move within a small range along the radial direction.

Description of drawings

Fig. 1 is a schematic diagram of the explosion structure of Embodiment 1 of the present utility model.

Fig. 2 is a schematic diagram of the explosion structure of the second embodiment of the utility model.

Detailed ways

Embodiment 1. This embodiment is applied to a European-style cable branch box live jumper that only needs to connect one branch wire. As shown in FIG. 1 , the connector includes a butt joint 1 , a lead joint 2 and a sealing joint 3 connected in sequence.

The butt joint 1 includes a butt joint connecting conductor 11 and a butt joint hard insulating sheath 12 integrated therewith. The inner conductor 11 of the butt joint is an integral part of the front section screw and the back section helical tube with opposite screw threads at both ends. The outer diameter of the screw tube section is larger than that of the screw section, and its outer wall has an outwardly protruding positioning ring. The front section of the hard insulating sleeve 12 of the butt joint is a conical interrupter 13, the middle section is a hexagonal wrench holding section 14, and the rear section is a hollow cylindrical section with an outer diameter smaller than the outer diameter of the small diameter end of the front section. The outer wall of the rear section has Connection thread.

The inner conductor 11 of the butt joint extends into the conical arc extinguishing chamber 13 of the hard insulating sleeve 12 of the butt joint with a screw section and is embedded in the axial center of the hard insulating sleeve 12 of the butt joint, so that the inner conductor 11 of the butt joint is in contact with the hard insulating sleeve of the butt joint. There is a radial movement space of about 1mm between the quality insulating sleeves 12.

The lead joint 2 includes a lead joint connection conductor 21 and a lead joint rigid insulating sheath 22 integrated therewith. The inner conductor 21 of the lead joint is an integral part of the front screw rod and the rear coil tube matched with the butt joint inner conductor 11. The outer diameter of the screw tube segment is larger than the outer diameter of the screw rod segment, and the outer wall has an outwardly protruding positioning ring. The hard insulating sleeve 22 of the lead joint is a T-shaped three-way sleeve, and the front section of the upper end of the sleeve is a cylindrical arc extinguishing chamber 22, and the inner wall of the cylindrical arc extinguishing chamber 222 has an outer wall with the outer wall of the rear section of the hard insulating sleeve 12 of the butt joint. The thread matches the internal thread, and the upper side of the axial through hole in the upper sleeve has a positioning groove 221 for positioning the terminal. The outer wall of the lower part of the T-shaped tee sleeve has a connection hole for grounding leads, and the lower end is threadedly connected with a hard insulating cover 23. The inner conductor 21 of the lead joint extends into the cylindrical arc extinguishing chamber 221 with a screw section and is embedded in the front of the positioning groove on the upper side of the axial through hole in the upper casing body.

The sealing head 3 includes a sealing head connecting conductor 31 and a sealing head hard insulating sheath 32 integrated therewith. The inner conductor 31 of the sealing head is embedded in the axial center of the hard insulating sleeve 32 of the sealing head. The internal conductor 31 of the sealing head includes a screw section and a straight rod section at the rear end thereof. The outer wall of the straight rod section has an outwardly protruding positioning ring. , the axial center of the hard insulating sleeve 32 of the sealing head has a blind hole from the front face to the rear for installing the internal conductor 31 of the sealing head, and the rear end of the outer wall of the hard insulating sleeve 32 of the sealing head is a hexagonal wrench holding section, The front end of the hard insulating sheath 32 of the sealing head has a groove corresponding to the outer diameter of the inner conductor boss section outer diameter.

When assembling and docking, firstly insert the terminal of the crimped cable into the positioning groove of the upper sleeve of the lead joint, then insert a rubber pad at the front end of the sealing joint, and insert the screw rod connecting the conductor of the sealing joint into the lead joint. After passing through the connecting hole on the terminal, it is threaded with the conductor connected to the lead joint, and then an insulating wrench is used to clamp the hexagonal segment at the rear end of the sealing joint to rotate the sealing joint, and the screw rod connected to the conductor of the sealing joint is connected to the thread at the rear end of the conductor connected to the lead joint. The connection is tight, so that the sealing head and the lead joint are assembled into one; then the front section of the butt joint hard insulating sleeve is placed on the outer wall of the butt joint sleeve, and the rear section is set on the front end of the lead joint hard insulator. In the arc chamber, use an insulating wrench to clamp the hexagonal segment on the hard insulating sleeve of the butt joint to rotate the butt joint, so that both ends of the butt joint connection conductor are threadedly connected with the conductor in the butt joint sleeve and the lead joint connection conductor. The rear section of the hard insulating sleeve of the connector is threaded and fastened with the front section of the insulating sleeve of the lead joint.

Note that before butt jointing, put rubber pads on the screw heads of the connecting conductors of the butt joint and the lead joint. The rubber pad has the functions of waterproof, moisture-proof and relaxation. After the joints are connected, the inner conductors are connected as a whole, and the outside is insulated and sealed by a hard insulating sleeve.

In order to improve the strength of the utility model to adapt to the transfer of branch wires with higher voltage levels, screw connections are used between the internal conductors of the butt joint and the lead joint and the hard insulating sleeve; The conductor can move within a small range along the radial direction.

When disassembling, only need to reversely rotate the butt joint to separate the connecting piece from the butt sleeve on the cable branch box.

Embodiment 2. This embodiment is applied to live jumpers of European-style cable branch boxes that need to connect two branch wires. As shown in FIG. 2 , the connector includes a butt joint 1 , a lead joint 2 , a continuous joint 6 , a butt joint 1 , a lead joint 2 and a sealing joint 3 which are sequentially connected.

The connector 6 includes a connector connecting conductor 61 and a connector rigid insulator 62 integrated therewith. The inner conductor 61 of the continuous joint is sequentially composed of a screw section, a boss section, a straight section and a coil section from front to back. The rigid insulating sleeve 62 of the connector is tapered conical, and the middle section is a hexagonal wrench holding section 621 . The axial center of the rigid insulating sleeve 62 of the continuous joint has a mounting hole whose shape corresponds to the shape of the inner conductor straight bar section to the coil section, and the boss section and the screw section of the internal conductor 61 of the joint joint are located outside the front end of the hard insulating sleeve 62 , the front end of the splice hard insulating sleeve 62 has grooves corresponding to the periphery of the outer diameter of the splice inner conductor 61 boss section. The screw section of the internal conductor 61 of the extension joint is threadedly connected to the rear section of the internal conductor 21 of the lead joint, and the coil section is threadedly connected to the front section of the internal conductor 11 of the butt joint.

In this embodiment, the adjacent two lead joints are connected as a whole through a continuous joint and a butt joint. The two ends of the assembly of the butt joint are connected with the lead joint respectively, and then the two lead joints are connected by rotating the joint and the assembly of the butt joint with an insulating wrench, and then the rear end of the second lead joint is connected to the sealing head, and finally Connect the aforementioned integral parts to the butt sleeve on the cable branch box through the butt joint: respectively connect the two ends of the butt joint with the butt sleeve of the cable branch box and the first lead joint, and then use an insulating wrench to rotate the butt joint to make it Both ends are connected to the butt sleeve and the lead connector at the same time. Other structures and assembly operations of this embodiment are the same as those of Embodiment 1.

When connecting multiple branch wires, the two branch wires are analogized, and the last lead joint is closed with a sealing joint.

Butt joints, lead joints, extension joints and sealing joints of the utility model are all integrally connected to the insulator and the internal conductor, and the connection points are all inside the insulator and sealed by the insulator after connection, so live and safe connections can be realized. Secondly, the design of the extension connector can realize the continuous expansion of multiple extension connectors and lead connectors, and improve the flexibility of branching. In addition, rubber pads are used between the joints to prevent moisture and looseness, which is conducive to the long-term safe and stable operation of the product.

Claims (8)

1. A live lap joint for a European-style cable branch box, characterized in that: it includes at least one butt joint and lead joint, several continuous joints and a sealing joint, and the butt joint, lead joint and sealing joint are connected successively to form a branch lap joint The joints or adjacent lead joints are connected by continuous joints and butt joints. The front end of the first lead joint is connected to the butt joint, and the rear end of the last lead joint is connected to the sealing joint to form a multi-branch lap joint; each joint is internal The integral part of the conductor and the external hard insulating sleeve is integrated. The connection ends of the internal conductors of each joint adopt a threaded connection structure. Rotate the butt joint or the continuous joint. 2. The European-style cable branch box live lap joint according to claim 1, characterized in that: the butt joint includes an inner conductor of the butt joint and a hard insulating sleeve of the butt joint, and the inner conductor of the butt joint has opposite screw threads at both ends The integral part of the front section screw and the rear section coil, the outer diameter of the screw section is larger than the outer diameter of the screw section, and the outer wall has a convex positioning ring; the front section of the hard insulating sleeve of the butt joint is a conical arc extinguishing chamber, and the middle section is The wrench holding section, the rear section is a hollow cylindrical section with an outer diameter smaller than the outer diameter of the small diameter end of the front section, and the outer wall has connecting threads; The length of the screw section of the internal conductor of the butt joint is less than the depth of the conical arc extinguishing chamber, and the internal conductor of the butt joint extends into the conical arc extinguishing chamber with the screw section, and the rear end of the screw tube is flush with the rear end of the hard insulating sleeve of the butt joint, and can be moved along The radial movement is embedded in the axial center of the hard insulating sleeve of the butt joint. 3. The European-style cable branch box live jumper according to claim 2, characterized in that: the middle section of the hard insulating sleeve of the butt joint is in the shape of a hexagon. 4. The European-style cable branch box live jumper as claimed in claim 2, characterized in that: the lead joint includes a lead joint inner conductor and a lead joint hard insulating sleeve, and the lead joint inner conductor is connected to the inside of the butt joint The integral part of the front screw and the rear coil matched with the conductor, the outer diameter of the coil section is larger than the outer diameter of the screw section, and the outer wall has a convex positioning ring; the hard insulating sleeve of the lead joint is a T-shaped three-way sleeve, and the upper end The front section of the casing is a cylindrical arc extinguishing chamber, and the inner wall of the cylindrical arc extinguishing chamber has an internal thread matching the external thread of the outer wall of the rear section of the hard insulating sleeve of the butt joint. The upper side of the axial through hole in the upper end of the casing is useful Positioning grooves for positioning terminals; the outer wall of the lower body of the T-shaped three-way sleeve has a grounding lead connection hole, and the lower end is screwed to a hard insulating cover; The inner conductor of the lead joint extends into the cylindrical arc extinguishing chamber with a screw section and is embedded in the front of the positioning groove on the upper side of the axial through hole in the upper casing. 5. The live lap joint of European-style cable branch box according to claim 4, characterized in that: the extension joint includes the inner conductor of the extension joint and the hard insulating sleeve of the extension joint, and the inner conductor of the extension joint is a screw section from front to back , boss section, straight rod section and spiral tube section, the thread direction of the screw rod section and the spiral tube section is opposite, and there is an outwardly protruding positioning ring on the straight rod section; the hard insulating sleeve of the continuous joint is tapered conical, and the middle section of the outer wall It is a wrench clamping section. The axial center of the hard insulating sleeve of the continuous joint has a mounting hole whose shape corresponds to the shape of the straight rod section of the internal conductor to the coil section. The boss section and the screw section of the internal conductor of the joint joint are located Out of the front end of the sleeve, there is a groove on the front end of the splice rigid insulation sleeve corresponding to the outer diameter of the inner conductor boss section; The external thread of the screw section of the internal conductor of the continuous joint matches the internal thread of the internal conductor of the lead joint, and the internal thread of the coil tube section matches the external thread of the screw section of the internal conductor of the butt joint. 6. The live jumper of European-style cable branch box according to claim 5, characterized in that: the middle section of the hard insulating sleeve of the splice is in the shape of a hexagon. 7. The European-style cable branch box live lap joint according to claim 5, characterized in that: the sealing joint includes an internal conductor of the sealing joint and a hard insulating sleeve of the sealing joint, and the internal conductor of the sealing joint is embedded in the hard sealing joint. The axial center of the insulating sleeve; the internal conductor of the sealing joint includes a screw section and a straight bar section at the rear end, the outer wall of the straight bar section has an outwardly protruding positioning ring, and the front part of the screw section and the straight bar section protrudes from the sealing head for hard insulation Outside the front end of the sleeve, there is a blind hole in the axial center of the hard insulating sleeve from the front end to install the inner conductor of the sealing head. The rear end of the outer wall of the hard insulating sleeve of the sealing head is a hexagonal wrench holding section. The front end of the hard insulating sleeve of the sealing joint has a groove corresponding to the outer diameter of the inner conductor boss section, and a rubber pad is embedded in the groove. 8. The European-style cable branch box live jumper as claimed in claim 1, characterized in that: when the joints are connected, they are matched with corresponding rubber pads.