Buried cable butt joint box

Abstract

The utility model discloses a buried cable butt-joint box, which comprises a butt-joint box body, a mounting bracket, main sleeves, sub-sleeves, a welding plate, a conductor and the like, the butt-joint ends of two cables are sleeved in the main sleeves of two butt-joint heads in a one-to-one manner, a conductive core is aligned with the welding plate, and the welding plate is heated by using an electric heating wire in the welding plate to weld the conductive core and the welding plate. When a cable joint needs to be replaced and maintained, the welding plate is detached, the welding plate is pulled out of the main sleeve along with the butt joint end of the cable, a new welding plate is replaced, or the cable and the welding plate are separated by using a tool outside, so that the cable joint is replaced and maintained. According to the butt-joint device for the butt-joint cable, the butt-joint plate is sleeved with the sub-sleeves for connection, so that a new cable can be butt-jointed, the technical defect that in the butt-joint technology for the butt-joint cable, the cable is inconvenient to maintain and replace is overcome, the beneficial effects are achieved, and the butt-joint convenience of the butt-joint cable is improved.

Description

Technical Field

[0001] The utility model relates to the field of cable docking equipment, in particular to an underground cable docking box. Background Art

[0002] In the prior art, an underground cable docking box is often used, which usually includes a docking box body and two docking joints electrically connected to each other, respectively docking the docking ends of two cables. The common docking joint structure in this technology uses mechanical contact to connect the cables. The connection quality between the two sections of the cable in this technology is poor, and burrs are prone to occur, resulting in unstable conductivity of the cable docking part.

[0003] In order to solve the above technical problems, a series of technologies are available, which use welding methods, adopt welding connection structures at the joints, use welding agents or welding materials to weld the core of the cable to the welding connection structure in the joints, or directly weld two sections of cable, so as to achieve better electrical connection quality. However, in this type of technology, during the replacement and maintenance of the cable, it is difficult to separate the welding parts of the cable due to the size of the docking box, the operation is cumbersome and the device is easily damaged in a narrow space. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems in the prior art and provide an underground cable docking box that overcomes the technical defects of the fusion cable docking technology in the inconvenience of repairing and replacing cables, including:

[0005] The docking box has through holes at both ends thereof;

[0006] Two docking joints are arranged in the docking box, and the docking joints include:

[0007] A mounting bracket is connected to the bottom of the docking box;

[0008] A main sleeve is connected to the mounting bracket, one end of the main sleeve is open and faces the through hole, and the butt end of the cable is sleeved in the main sleeve;

[0009] A sub-sleeve is connected to the mounting bracket, one end of the sub-sleeve is open and faces the through hole, the sub-sleeve is located inside the main sleeve and faces the conductive core of the cable;

[0010] A welding plate is detachably connected to the sub-sleeve, the side of the welding plate facing the through hole can contact the conductive core of the cable, and an electric heating wire is provided inside the welding plate for heating the welding plate so that the welding plate and the conductive core are welded;

[0011] A conductor is fixedly connected to the mounting bracket, one end of the conductor faces the interior of the sub-sleeve, and when the welding plate is connected to the sub-sleeve, the conductor contacts the welding plate to be electrically connected;

[0012] The conductors in the two butt joints are electrically connected to each other.

[0013] Furthermore, the butt joint also includes:

[0014] A heat-conducting column is slidably sleeved inside the sub-sleeve and is located on a side of the welding plate away from the conductive core. The heat-conducting column has a plurality of first channels parallel to the central axis of the heat-conducting column.

[0015] Multiple conductive bundles are parallel to the central axis of the heat-conducting column, one conductive bundle corresponds to a first channel, one end of the conductive bundle is fixedly connected to the side of the welding plate away from the conductive core, the conductive bundle can slide in the corresponding first channel, and the other end of the conductive bundle can abut against the conductor to achieve electrical connection between the conductor and the welding plate.

[0016] Furthermore, the butt joint also includes:

[0017] The connecting rod is fixedly connected to the side of the welding plate away from the conductive core. A second channel parallel to the center line of the heat-conducting column is opened in the heat-conducting column, and the connecting rod can slide in the second channel;

[0018] The access wire is buried inside the connecting rod, one end of which penetrates into the welding plate to be electrically connected to the heating wire, and the other end of which passes out from the side of the connecting rod away from the welding plate. The outside of the access wire is covered with a ceramic insulation layer;

[0019] The hot-melt wire is buried inside the mounting bracket, one end of which is located inside the sub-sleeve. When the conductive bundle abuts against the conductor, the end of the hot-melt wire located inside the sub-sleeve can abut against the end of the access wire that passes through the side of the connecting rod away from the welding plate, and the other end of the hot-melt wire passes through the mounting bracket;

[0020] The power supply plug is arranged inside the docking box body and connected to the end of the hot-melt wire passing through the bracket, and is used for electrical connection with an external power supply.

[0021] Furthermore, the welding plate includes a copper alloy plate and a ceramic ring, the ceramic ring is fixedly sleeved on the outer edge of the copper alloy plate, the connecting rod is fixedly connected to the ceramic ring, and each conductive beam is fixedly connected to the copper alloy plate.

[0022] Furthermore, the butt joint further comprises a locking mechanism, which is arranged between the welding plate and the sub-sleeve to achieve a detachable connection between the welding plate and the sub-sleeve.

[0023] Furthermore, the locking mechanism includes: a plurality of fastening bolts, a plurality of corresponding bolt holes are provided on the end side wall of the sub-sleeve facing the through hole, the fastening bolts are arranged in the bolt holes and the end of the fastening bolts facing the inside of the sub-sleeve can abut against the outer side surface of the ceramic ring, thereby locking the relative position between the welding plate and the sub-sleeve in a fastening manner.

[0024] Furthermore, the heat-conducting column includes a heat-resistant layer and a heat-conducting section in the axial direction thereof, the heat-resistant layer is connected between the heat-conducting section and the welding plate, the heat-resistant layer is made of ceramic material, and the heat-conducting section is made of heat-conducting silicone.

[0025] Furthermore, a plurality of heat dissipation holes are provided on the side walls of the main sleeve and the sub-sleeve.

[0026] Furthermore, a heat exhaust fan is connected to the bottom of the docking box, the heat exhaust fan is located below the sub-sleeve, and the heat exhaust fan is electrically connected to the power supply plug.

[0027] Compared with the prior art, the utility model has the following beneficial effects: when in use, the butt ends of the two cables are inserted into the main sleeves of the two butt joints one by one, and the conductive core is aligned with the welding plate, and the heating wire in the welding plate is used to heat the welding plate to weld the conductive core and the welding plate, thereby completing the welding and keeping the welding plate in contact with the conductor. The two cables are electrically connected to the conductor through the welding plate. When the cable joint needs to be replaced and maintained, the welding plate is removed, and the welding plate and the butt ends of the cables are pulled out of the main sleeve, and a new welding plate is replaced or a tool is used to separate the cable and the welding plate outside, and then the welding plate is inserted into the sub-sleeve for connection, so that the new cable can be docked, overcoming the technical defect of the welding cable docking technology, which is inconvenient when repairing and replacing cables, thereby achieving beneficial effects and increasing the convenience of welding cable docking. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A side cross-sectional view of the main structure of one embodiment;

[0029] Figure 2 A side cross-sectional view of the main structure of one embodiment;

[0030] Figure 3 This is a main structural front view of one embodiment;

[0031] Figure 4 It is a partial structural perspective diagram of one embodiment;

[0032] Figure 5 It is an overall side cross-sectional view of one embodiment.

[0033] Description of reference numerals:

[0034] 1. Docking box; 21. Mounting bracket; 221. Main sleeve; 222. Sub-sleeve; 23. Welding plate; 231. Copper alloy plate; 232. Ceramic ring; 24. Heat-conducting column; 25. Conductive bundle; 26. Connecting rod; 261. Access wire; 262. Hot-melt wire; 27. Power plug; 3. Fastening bolts; 4. Heat exhaust fan; 5. Conductor. DETAILED DESCRIPTION

[0035] The specific implementation of the utility model is described in detail below, but it should be understood that the protection scope of the utility model is not limited by the specific implementation. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The utility model provides an underground cable docking box, comprising: a docking box body 1 and two docking joints, wherein the docking box body 1 has through holes at both ends in the length direction thereof; the two docking joints are arranged in the docking box body 1, and the docking joints comprise: a mounting bracket 21, a main sleeve 221, a sub-sleeve 222, a welding plate 23, a conductor 5, etc., wherein the mounting bracket 21 is connected to the bottom of the docking box body 1; the main sleeve 221 is connected to the mounting bracket 21, one end of the main sleeve 221 is open and faces the through hole, and the docking end of the cable is sleeved in the main sleeve 221; the sub-sleeve 222 is connected to the mounting bracket 21, one end of the sub-sleeve 222 is open and faces the through hole, and the butt end of the cable is sleeved in the main sleeve 221; Towards the through hole, the sub-sleeve 222 is located inside the main sleeve 221 and is directly opposite to the conductive core of the cable; the welding plate 23 is detachably connected to the sub-sleeve 222, and the side of the welding plate 23 facing the through hole can contact the conductive core of the cable, and an electric heating wire is provided inside the welding plate 23 for heating the welding plate 23 so that the welding plate 23 and the conductive core are melted; the conductor 5 is fixedly connected to the mounting bracket 21, and one end of the conductor 5 faces the inside of the sub-sleeve 222, and when the welding plate 23 is connected to the sub-sleeve 222, the conductor 5 contacts the welding plate 23 and is electrically connected; the conductors 5 in the two butt joints are electrically connected to each other.

[0037] Specifically, please refer to Figures 1 to 5 When in use, the butt ends of the two cables are inserted into the main sleeves 221 of the two butt joints one by one, and the conductive core is aligned with the welding plate 23, and the heating wire in the welding plate 23 is used to heat the welding plate to weld the conductive core and the welding plate, thereby completing the welding, keeping the welding plate 23 in contact with the conductor 5, and the two cables are electrically connected to the conductor 5 through the welding plate 23. When the cable joint needs to be replaced and maintained, the welding plate 23 is removed, and the welding plate 23 and the butt ends of the cables are pulled out of the main sleeve 221, and a new welding plate 23 is replaced or a tool is used to separate the cable and the welding plate 23 outside, and then the welding plate 23 is inserted into the sub-sleeve 222 for connection, so that the new cable can be docked, which overcomes the technical defects of the welding cable docking technology, which is inconvenient when repairing and replacing cables, thereby achieving beneficial effects and increasing the convenience of welding cable docking.

[0038] During welding, the existing technical means can be used to add a welding agent between the cable and the welding plate 23 and heat with an electric heating wire to achieve welding.

[0039] In various embodiments, the mounting bracket 21 and the conductor 5 are both prior art parts in a conventional docking box.

[0040] Furthermore, the present invention aims to improve the convenience of cable replacement, and is based on a detachable welding plate and a conductor 5 that can abut against / separate from the welding plate. However, considering that the welding plate has a high temperature during use, adhesion between the welding plate 23 and the conductor 5 may occur, thereby affecting the removal of the welding plate 23. Therefore, it is necessary to consider optimizing the contact structure between the welding plate 23 and the conductor 5. The butt joint also includes:

[0041] The heat-conducting column 24 is slidably sleeved inside the sub-sleeve 222 and is located on the side of the welding plate 23 away from the conductive core. The heat-conducting column 24 has a plurality of first channels parallel to the central axis of the heat-conducting column 24;

[0042] Multiple conductive bundles 25 are parallel to the central axis of the heat-conducting column 24, one conductive bundle 25 corresponds to a first channel, one end of the conductive bundle 25 is fixedly connected to the side of the welding plate 23 away from the conductive core, the conductive bundle 25 can slide in its corresponding first channel, and the other end of the conductive bundle 25 can abut against the conductor 5 to achieve electrical connection between the conductor 5 and the welding plate 23.

[0043] The welding plate 23 realizes the conductive function by disconnecting the conductive bundle 25 from the conductor 5. The conductive bundle 25 passes through the heat-conducting column 24. When the welding plate 23 is at a high temperature, the heat is transferred to the conductive bundle 25. Since the conductive bundle 25 passes through the heat-conducting column 24, the heat can be transferred to the heat-conducting column 24 when passing through the conductive bundle 25, thereby reducing the temperature at the contact point between the conductive bundle 26 and the conductor 5 and avoiding the adhesion problem.

[0044] The heat-conducting pillars 24 include heat-absorbing / heat-conducting materials, such as heat-conducting silicone, graphite, heat-conducting insulating rubber, etc. In each embodiment, the outer side of the conductive beam has an insulating layer.

[0045] Furthermore, it is necessary to consider the technical details of power supply to the heating wire in the detachable welding plate 23, therefore, the butt joint also includes:

[0046] The connecting rod 26 is fixedly connected to the side of the welding plate 23 away from the conductive core. A second channel parallel to the center line of the heat-conducting column 24 is opened in the heat-conducting column 24, and the connecting rod 26 can slide in the second channel;

[0047] The access wire 261 is buried in the connecting rod 26, one end of which penetrates into the welding plate 23 to be electrically connected to the heating wire, and the other end of which passes out from the side of the connecting rod 26 away from the welding plate 23. The outside of the access wire 261 is covered with a ceramic insulation layer;

[0048] The hot-melt wire 262 is buried inside the mounting bracket 21, and one end of the hot-melt wire 262 is located inside the sub-sleeve 222. When the conductive bundle 25 abuts against the conductor 5, the end of the hot-melt wire 262 located inside the sub-sleeve 222 can abut against the end of the access wire 261 that passes through the side of the connecting rod 26 away from the welding plate 23, and the other end of the hot-melt wire 262 passes through the mounting bracket 21;

[0049] The power supply plug 27 is disposed inside the docking box 1 and connected to the end of the hot-melt wire 262 passing through the bracket, so as to be electrically connected to an external power source.

[0050] With the above arrangement, when unpacking and replacing the cable, the power supply plug 27 is used to connect the external power supply to heat the welding plate 23, so as to facilitate the removal / welding of the cable.

[0051] Furthermore, in order to prevent the edge of the welding plate 23 from sticking to the sleeve 222 at high temperature, the welding plate 23 includes a copper alloy plate 231 and a ceramic ring 232. The ceramic ring 232 is fixedly sleeved on the outer edge of the copper alloy plate 231. The connecting rod 26 is fixedly connected to the ceramic ring 232. Each conductive beam 25 is fixedly connected to the copper alloy plate 231. The ceramic ring 232 will not stick at high temperature. At the same time, the copper alloy plate 231 retains the conductive properties of the welding plate 23.

[0052] Furthermore, the butt joint further includes a locking mechanism, which is disposed between the welding plate 23 and the sub-sleeve 222 to achieve a detachable connection between the welding plate 23 and the sub-sleeve 222 .

[0053] Further, the locking mechanism includes: a plurality of fastening bolts 3, and a plurality of corresponding bolt holes are provided on the side wall of the end of the sub-sleeve 222 facing the through hole, wherein the fastening bolts 3 are arranged in the bolt holes and one end of the fastening bolts 3 facing the inside of the sub-sleeve 222 can abut against the outer side surface of the ceramic ring 232, thereby locking the relative position between the welding plate 23 and the sub-sleeve 222 in a fastening manner. This arrangement matches the fastening bolts 3 with the ceramic ring 232, and will not affect the welding plate 23 at high temperature.

[0054] Furthermore, the influence of the heat resistance of the heat-conducting column near the welding plate 23 on its service life is considered. In particular, the heat-conducting column 24 includes a heat-resistant layer 241 and a heat-conducting segment 242 in the axial direction thereof. The heat-resistant layer 241 is connected between the heat-conducting segment 242 and the welding plate 23. The heat-resistant layer 241 is made of ceramic material, and the heat-conducting segment 242 is made of heat-conducting silicone.

[0055] Furthermore, a plurality of heat dissipation holes are formed on the side walls of the main sleeve 221 and the sub-sleeve 222 .

[0056] Furthermore, a heat exhaust fan 4 is connected to the bottom of the docking box 1 . The heat exhaust fan 4 is located below the sub-sleeve 222 . The heat exhaust fan 4 is electrically connected to the power plug 27 .

[0057] With the above arrangement, when the docking box 1 is opened for welding, the power plug 27 can be connected to an external power source, and the heat exhaust fan 4 can be started during welding to speed up the heat dissipation efficiency and avoid the influence of the high-temperature welding plate 23 on other adjacent structures.

[0058] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underground cable docking box, comprising a docking box body (1), having through holes at both ends thereof, characterized in that: It also includes two docking joints arranged in the docking box body (1), the docking joints including: A mounting bracket (21) connected to the bottom of the docking box (1); A main sleeve (221) is connected to the mounting bracket (21), one end of the main sleeve (221) is open and faces the through hole, and the butt end of the cable is sleeved in the main sleeve (221); A sub-sleeve (222) is connected to the mounting bracket (21), one end of the sub-sleeve (222) is open and faces the through hole, and the sub-sleeve (222) is located inside the main sleeve (221) and faces the conductive core of the cable; A welding plate (23) is detachably connected to the sub-sleeve (222); the side of the welding plate (23) facing the through hole can contact the conductive core of the cable; a heating wire is provided inside the welding plate (23) for heating the welding plate (23) so as to fuse the welding plate (23) with the conductive core; A conductor (5) is fixedly connected to the mounting bracket (21), one end of the conductor (5) faces the interior of the sub-sleeve (222), and when the welding plate (23) is connected to the sub-sleeve (222), the conductor (5) contacts the welding plate (23) to thereby establish an electrical connection; The conductors (5) in the two butt joints are electrically connected to each other.

2. The underground cable connection box according to claim 1, characterized in that: The butt joint also includes: A heat-conducting column (24) is slidably sleeved inside the sub-sleeve (222) and is located on a side of the welding plate (23) away from the conductive core, wherein the heat-conducting column (24) has a plurality of first channels parallel to the central axis of the heat-conducting column (24); A plurality of conductive bundles (25) are parallel to the central axis of the heat-conducting column (24), one conductive bundle (25) corresponds to one first channel, one end of the conductive bundle (25) is fixedly connected to the side of the welding plate (23) away from the conductive core, the conductive bundle (25) can slide in the corresponding first channel, and the other end of the conductive bundle (25) can abut against the conductor (5) to achieve electrical connection between the conductor (5) and the welding plate (23).

3. The underground cable connection box according to claim 2, characterized in that: The butt joint also includes: A connecting rod (26) is fixedly connected to the side of the welding plate (23) facing away from the conductive core, a second channel parallel to the center line of the heat-conducting column (24) is provided in the heat-conducting column (24), and the connecting rod (26) can slide in the second channel; An access conductor (261) is buried inside the connecting rod (26), one end of which penetrates into the inside of the welding plate (23) to be electrically connected to the heating wire, and the other end of which penetrates out from a side of the connecting rod (26) away from the welding plate (23), and the outside of the access conductor (261) is provided with a ceramic insulating layer; A hot-melt wire (262) is buried inside the mounting bracket (21), one end of which is located inside the sub-sleeve (222). When the conductive bundle (25) and the conductor (5) abut against each other, the end of the hot-melt wire (262) located inside the sub-sleeve (222) can abut against the end of the access wire (261) that passes through the side of the connecting rod (26) away from the welding plate (23), and the other end of the hot-melt wire (262) passes through the mounting bracket (21); The power supply plug (27) is arranged inside the docking box (1) and is connected to the end of the hot-melt wire (262) passing through the bracket, and is used for electrically connecting to an external power source.

4. The underground cable connection box according to claim 3, characterized in that: The welding plate (23) comprises a copper alloy plate (231) and a ceramic ring (232); the ceramic ring (232) is fixedly sleeved on the outer edge of the copper alloy plate (231); the connecting rod (26) is fixedly connected to the ceramic ring (232); and each conductive beam (25) is fixedly connected to the copper alloy plate (231).

5. The underground cable connection box according to claim 4, characterized in that: The butt joint further comprises a locking mechanism, which is arranged between the welding plate (23) and the sub-sleeve (222) to achieve a detachable connection between the welding plate (23) and the sub-sleeve (222).

6. The underground cable connection box according to claim 5, characterized in that: The locking mechanism comprises: a plurality of fastening bolts (3); a plurality of corresponding bolt holes are provided on the end side wall of the sub-sleeve (222) facing the through hole; the fastening bolts (3) are arranged in the bolt holes and one end of the fastening bolts (3) facing the inside of the sub-sleeve (222) can abut against the outer side surface of the ceramic ring (232), thereby locking the relative position between the welding plate (23) and the sub-sleeve (222) in a fastening manner.

7. The underground cable connection box according to claim 6, characterized in that: The heat-conducting column (24) comprises a heat-resistant layer (241) and a heat-conducting section (242) in the direction of its central axis, the heat-resistant layer (241) is connected between the heat-conducting section (242) and the welding plate (23), the heat-resistant layer (241) is made of ceramic material, and the heat-conducting section (242) is made of heat-conducting silica gel.

8. The underground cable connection box according to claim 7, characterized in that: A plurality of heat dissipation holes are provided on the side walls of the main sleeve (221) and the sub-sleeve (222).

9. The underground cable connection box according to claim 8, characterized in that: The bottom of the docking box (1) is connected to a heat exhaust fan (4), the heat exhaust fan (4) is located below the sub-sleeve (222), and the heat exhaust fan (4) is electrically connected to the power supply plug (27).

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