Low-voltage cable branch box with cable fixing function

Abstract

The invention discloses a low-voltage cable branch box with a cable fixing function, and relates to the technical field of cable branch boxes, the low-voltage cable branch box comprises a box body, and door frames are arranged at the front part and the rear part of the box body. According to the low-voltage cable branch box with the cable fixing function, after a cable penetrates into an inner cavity of the box body from a threading pipe, a rotating disc is rotated to drive a screw rod and a second bevel gear to rotate, and the first bevel gear is driven to rotate through meshing transmission between the second bevel gear and the first bevel gear; a plurality of screw rods are driven to rotate through transmission between a first bevel gear and a plurality of second bevel gears, and a plurality of extrusion square columns are driven to move towards an inner cavity of the threading pipe through screw-thread fit between the plurality of screw rods and a plurality of extrusion square columns, so that a cable penetrating through the inner cavity of the threading pipe is clamped and fixed by the end parts of the plurality of extrusion square columns; the firmness of the cable penetrating into the inner cavity of the box body from the threading pipe is ensured, the cable is prevented from being pulled after being wired in the inner cavity of the box body, and the quality of cable branches is ensured.

Description

Technical Field

[0001] This invention relates to the field of cable branch box technology, specifically a low-voltage cable branch box with cable fixing capabilities. Background Technology

[0002] With the development of cable distribution networks, when small-capacity independent loads are concentrated, cable branch boxes can be used to connect multiple branches of cables. Technically, cable branch boxes electrically connect the conductors of the main cable to the conductors of multiple branch cables through internal branch connectors or terminals. This connection method ensures smooth current transmission and avoids problems such as poor contact or short circuits that may occur with direct wiring. It is widely used in urban power grids, industrial parks, residential areas, and other places requiring power distribution. However, existing cable branch boxes do not easily ensure the stability between the cable and the box when the cable is threaded into the box. When the cable is pulled, the connection between the cable and the copper busbar may loosen, affecting the stability of the cable branch connection. Furthermore, it is difficult to ensure the sealing between the cable and the box; when the cable is threaded into the box, external moisture can enter the box, causing electrical faults inside. Therefore, we propose a low-voltage cable branch box with cable fixing capabilities. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a low-voltage cable branch box with cable fixing capabilities, thus solving the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a low-voltage cable branch box with cable fixing, comprising a box body, door frames at the front and rear of the box body, door mechanisms at the front and rear of the box body, a power distribution mechanism in the inner cavity of the box body, multiple conduits fixedly sleeved at the bottom of the box body, fixing mechanisms on the sides of the multiple conduits, sealing mechanisms on the sides of the multiple fixing mechanisms, multiple square grooves on the sides of the conduits, and the bottom ends of the multiple conduits respectively fixedly sleeved to the bottom of the box body and provided with internal thread grooves. A plugging screw cap is threadedly sleeved in the inner cavity of the internal thread groove, and a sealing putty bag is provided on the inner side of the plugging screw cap.

[0005] Optionally, the fixing mechanism includes an outer fixing cover and a rolling bearing fixedly sleeved on the side of the conduit. A first bevel gear is fixedly sleeved on the outer side of the rolling bearing. A plurality of screws are rotatably connected to the outer fixing cover. A pressing square column is threaded onto the outer side of each end of the plurality of screws. The ends of the plurality of pressing square columns extend through square grooves into the inner cavity of the conduit. The inner wall of the square grooves fits against the side of the pressing square columns. A second bevel gear is fixedly sleeved on the outer side of each screw. The second bevel gear and the first bevel gear mesh with each other. One end of one screw extends to the outside of the outer fixing cover and is fixedly connected to a turntable. A rotating block is fixedly connected to the turntable.

[0006] Optionally, the sealing mechanism includes an air box fixedly connected to the side of the outer fixing cover. The air box has an inflation groove. A piston plate is slidably connected to the inner cavity of the inflation groove. Two limiting plates are fixedly connected to the side of the piston plate. The top and bottom surfaces of the two limiting plates are respectively in contact with the inner wall of the inflation groove. A rack is fixedly connected to the side of the piston plate. One end of a screw passes through the inner cavity of the inflation groove. A spur gear is fixedly sleeved on the side of the screw. The spur gear and the rack mesh with each other. Multiple fixing holes are provided on the outer side of the air box. A wing screw is threaded onto the turntable. One end of the wing screw is movably sleeved into the inner cavity of one fixing hole. Two air guide tubes are fixedly sleeved on the air box. One end of the two air guide tubes extends into the inner cavity of the inflation groove. The other ends of the two air guide tubes are respectively fixedly sleeved into the inner cavity of the conduit and fixedly connected to annular airbags. The two annular airbags are respectively fixedly sleeved into the inner cavity of the conduit.

[0007] Optionally, the power distribution mechanism includes two uprights fixedly connected to the inner wall of the box. An mounting plate is installed on the two uprights by bolts. Multiple sets of insulator support columns are installed on the front of the mounting plate. Copper busbars are installed on the multiple sets of insulator support columns. Multiple wiring rivet nuts are provided on each copper busbar. Multiple sets of threaded holes are provided on the mounting plate.

[0008] Optionally, the door mechanism includes a hinge fixedly installed on the box body, a sealed door fixedly installed on the hinge, a sealing strip fixedly connected to the inner side of the sealed door, and the side of the sealing strip fitting against the outer side of the box body.

[0009] Optionally, the bottom surface of the box is fixedly connected with multiple supporting channel steels, and the bottom surface of each of the multiple supporting channel steels is provided with multiple mounting holes.

[0010] Optionally, the mounting plate is provided with multiple welding nuts, and hexagonal bolts are fitted on both the insulator support column and the copper busbar, with one end of the hexagonal bolt threaded onto the welding nut.

[0011] Optionally, multiple absorbent cotton balls are fixedly sleeved on the inner side of the conduit.

[0012] This invention provides a low-voltage cable branch box with cable fixing, which has the following advantages: 1. This low-voltage cable branch box with cable fixing function works as follows: After the cable passes through the conduit into the inner cavity of the box, a rotating disc drives a screw and a second bevel gear to rotate. The meshing transmission between the second bevel gear and the first bevel gear drives the first bevel gear to rotate. The transmission between the first bevel gear and multiple second bevel gears drives multiple screws to rotate. The threaded engagement between the multiple screws and multiple extrusion square posts drives the multiple extrusion square posts to move into the inner cavity of the conduit. This allows the ends of the multiple extrusion square posts to clamp and fix the cable passing through the inner cavity of the conduit, ensuring the firmness of the cable passing through the conduit into the inner cavity of the box. This prevents the cable from being pulled apart after being connected in the inner cavity of the box, thus ensuring the quality of the cable branching.

[0013] 2. This low-voltage cable branch box with cable fixing function works by rotating a screw, which drives a spur gear to rotate. The meshing transmission between the spur gear and the rack drives the rack and piston plate to move. The movement of the piston plate pushes the gas in the inflation chamber through two air pipes into the inner chambers of two annular air bladders, causing the annular air bladders to expand and compress the cable, ensuring the seal between the cable and the conduit. In addition, the sealing putty in the sealing putty bag is taken out and plugged into the bottom of the inner cavity of the conduit to strengthen the seal between the conduit and the cable, ensuring the airtightness of the cable entering the inner cavity of the box.

[0014] 3. This low-voltage cable branch box with cable fixing uses multiple sets of insulator support columns of different heights to support and install multiple copper busbars. At the same time, the wiring rivet nuts on the multiple copper busbars are staggered. When the conductors on the inside of the cable are connected to multiple copper busbars, there will be no interference between the cables. This facilitates the connection between multiple cables and avoids cable tangling. It is convenient for wiring and maintenance, and has good performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the front of the present invention; Figure 2 This is a schematic diagram of the overall structure on the back of the present invention; Figure 3 This is a schematic diagram of the internal structure of the front of the present invention; Figure 4 This is a schematic diagram of the internal structure on the back of the present invention; Figure 5 This is a bottom-view structural diagram of the present invention; Figure 6 This is a schematic diagram of the conduit structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the air-filled groove of the present invention; Figure 8 This is a cross-sectional schematic diagram of the conduit of the present invention; Figure 9 This is a cross-sectional schematic diagram of the external fixing cover of the present invention; Figure 10 This is a schematic diagram of the structure of the air inflator of the present invention; Figure 11 This is a schematic diagram of the door mechanism of the present invention; Figure 12 This is a schematic diagram of the mounting plate of the present invention; Figure 13 This is a schematic diagram showing the disassembled mounting plate, insulator support column, and copper busbar of the present invention.

[0016] In the diagram: 1. Box body; 2. Box door mechanism; 3. Conduit; 4. Fixing mechanism; 5. Sealing mechanism; 6. Power distribution mechanism; 7. Support channel steel; 8. Mounting hole; 9. Square channel; 10. Internal threaded groove; 11. Plug cap; 12. Sealing putty bag; 13. Rolling bearing; 14. Outer fixing cover; 15. Screw; 16. Extruded square column; 17. Second bevel gear; 18. First bevel gear; 19. Inflation box; 20. Inflation slot; 21. Turntable; 22. 1. Rotating block; 23. Wing screw; 24. Spur gear; 25. Piston plate; 26. Limiting plate; 27. Rack; 28. Air duct; 29. ​​Annular airbag; 30. Absorbent cotton; 31. Stand; 32. Mounting plate; 33. Welding nut; 34. Insulator support column; 35. Copper busbar; 36. Hex bolt; 37. Wiring crimp nut; 38. Threaded hole; 39. Hinge; 40. Sealing box door; 41. Sealing strip; 42. Door frame; 43. Fixing hole. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Please see Figures 1 to 13This invention provides a technical solution: a low-voltage cable branch box with cable fixing, including a box body 1, a door frame 42 provided at the front and rear of the box body 1, a box door mechanism 2 provided at the front and rear of the box body 1, a power distribution mechanism 6 provided in the inner cavity of the box body 1, a plurality of conduit pipes 3 fixedly sleeved at the bottom of the box body 1, a fixing mechanism 4 provided on the side of the plurality of conduit pipes 3, a sealing mechanism 5 provided on the side of the plurality of fixing mechanisms 4, a plurality of square grooves 9 provided on the side of the conduit pipes 3, the bottom ends of the plurality of conduit pipes 3 respectively fixedly sleeved to the bottom of the box body 1 and provided with internal thread grooves 10, a plugging screw cap 11 threadedly sleeved in the inner cavity of the internal thread groove 10, a sealing mud bag 12 provided on the inner side of the plugging screw cap 11, and sealing mud bag 12 provided inside the sealing mud bag 12 so as to block and seal the conduit pipes 3 and cables after the wires are threaded through the conduit pipes 3.

[0019] The fixing mechanism 4 includes an outer fixing cover 14 and a rolling bearing 13 fixedly sleeved on the side of the conduit 3. A first bevel gear 18 is fixedly sleeved on the outer side of the rolling bearing 13. Multiple screws 15 are rotatably connected to the outer fixing cover 14. Extrusion square columns 16 are threadedly sleeved on the outer side of the ends of the multiple screws 15. The ends of the multiple extrusion square columns 16 extend through the square groove 9 to the inner cavity of the conduit 3. The inner wall of the square groove 9 fits against the side of the extrusion square column 16. The extrusion square column 16 is limited by the inner wall of the square groove 9, so that the extrusion square column 16 can only move along the axial direction of the screw 15. A second bevel gear 17 is fixedly sleeved on the outer side of the screw 15. The second bevel gear 17 and the first bevel gear 18 mesh with each other. One end of a screw 15 extends to the outside of the outer fixing cover 14 and is fixedly connected to a turntable 21. A rotating block 22 is fixedly connected to the turntable 21. The rotating block 22 is used to turn the turntable 21.

[0020] The sealing mechanism 5 includes an air box 19 fixedly connected to the side of the outer fixed cover 14. An air box 19 has an air groove 20. A piston plate 25 is slidably connected to the inner cavity of the air groove 20. Two limiting plates 26 are fixedly connected to the side of the piston plate 25. The top and bottom surfaces of the two limiting plates 26 are respectively in contact with the inner wall of the air groove 20. The limiting plates 26 and the air groove 20 cooperate to limit the piston plate 25. Simultaneously, the side of the piston plate 25 is in contact with the inner wall of the air groove 20, ensuring the sealing of the piston plate 25 as it moves within the air groove 20. A rack 27 is fixedly connected to the side of the piston plate 25. One end of a screw 15 penetrates the inner cavity of the air groove 20, and a spur gear 24 is fixedly sleeved on the side of the screw 15. The spur gear 24 and the rack 27 mesh with each other. Multiple fixing holes 43 are provided on the outer side of the air box 19. A wing screw 23 is threaded onto the turntable 21. One end of the wing screw 23 is movably fitted into the inner cavity of a fixing hole 43. The outer diameter of the threaded end of the wing screw 23 is equal to the inner diameter of the fixing hole 43 to ensure the stability of the end of the wing screw 23 when inserted into the fixing hole 43. Two air guide tubes 28 are fixedly fitted onto the air box 19. One end of the two air guide tubes 28 extends into the inner cavity of the air groove 20. The other end of the two air guide tubes 28 is fixedly fitted into the inner cavity of the conduit 3 and fixedly connected to annular airbags 29. The two annular airbags 29 are fixedly fitted into the inner cavity of the conduit 3. The two annular airbags 29 are fixedly fitted into the top and bottom of the inner cavity of the conduit 3 to provide a double seal between the cable and the conduit 3.

[0021] The power distribution mechanism 6 includes two uprights 31 fixedly connected to the inner wall of the enclosure 1. Mounting plates 32 are bolted to the uprights 31. Both the uprights 31 and the mounting plates 32 have round holes for securing the mounting plates 32 with bolts, nuts, washers, and spring clips. Multiple sets of insulator support columns 34 are mounted on the front of the mounting plates 32. Copper busbars 35 are mounted on each of the multiple sets of insulator support columns 34. Each copper busbar 35 has multiple wiring crimp nuts 37. Preferably, there are four or five sets of insulator support columns 34, and the heights of the multiple sets of insulator support columns 34 are different. The wiring crimp nuts 37 on the multiple copper busbars 35 are staggered to facilitate wiring on the copper busbars 35. The mounting plates 32 have multiple sets of threaded holes 38 for installing equipment such as surge arresters.

[0022] The door mechanism 2 includes a hinge 39 fixedly installed on the box body 1. A sealed door 40 is fixedly installed on the hinge 39. A sealing strip 41 is fixedly connected to the inner side of the sealed door 40. The side of the sealing strip 41 fits against the outer side of the box body 1. The sealing strip 41 ensures the sealing between the sealed door 40 and the box body 1. At the same time, a door lock is provided on the sealed door 40 to fix the sealed door 40. This is a known technology.

[0023] The bottom surface of the box 1 is fixedly connected with multiple support channel steels 7, and the bottom surface of each support channel steel 7 is provided with multiple mounting holes 8. The support channel steels 7 support the box 1, and the support channel steels 7 and the box 1 are fixed by the cooperation of the mounting holes 8 and bolts.

[0024] The mounting plate 32 is provided with multiple welding nuts 33, and hexagonal bolts 36 are fitted on the insulator support column 34 and the copper busbar 35. One end of the hexagonal bolt 36 is threaded onto the welding nut 33. The copper busbar 35 and the insulator support column 34 are provided with through holes for the hexagonal bolts 36 to pass through, so that the insulator support column 34 and the copper busbar 35 can be installed by the cooperation of the hexagonal bolts 36 and the welding nuts 33.

[0025] The inner side of the conduit 3 is fitted with multiple absorbent cotton 30s. The absorbent cotton 30s are used to scrape the outside of the cable passing through, so as to prevent water from being brought into the inner cavity of the box 1 when the cable is being threaded through.

[0026] In summary, when using this low-voltage cable branch box with cable fixing, the box body 1 is first fixed by the mounting holes 8, the supporting channel steel 7, and the bolts. The mounting plate 32, the insulator support column 34, and the copper busbar 35 are then assembled using hexagonal bolts 36 and welding nuts 33. The mounting plate 32 is then installed on the upright frame 31 inside the box body 1 using the bolt assembly. Then, the plug 11 at the bottom of the conduit 3 is removed so that the cable can pass through the conduit 3 at the bottom of the box body 1 into the inner cavity of the box body 1. At the same time, the absorbent cotton 30 is used to remove moisture and dust from the outside of the cable. During the scraping process, the hand grips the rotating block 22, which drives the turntable 21 to rotate. The turntable 21 then drives a screw 15 and a second bevel gear 17 to rotate. Through the meshing transmission between the second bevel gear 17 and the first bevel gear 18, the first bevel gear 18 rotates. Through the transmission between the first bevel gear 18 and multiple second bevel gears 17, multiple screws 15 rotate. Through the threaded engagement between the multiple screws 15 and multiple extrusion square pillars 16, the multiple extrusion square pillars 16 move into the inner cavity of the conduit 3, causing the ends of the extrusion square pillars 16 to press against the cable passing through the inner cavity of the conduit 3. The cable is clamped and fixed. Then, when the screw 15 rotates, it drives the spur gear 24 to rotate. Through the meshing transmission between the spur gear 24 and the rack 27, the rack 27 and the piston plate 25 move towards the air guide tube 28. The movement of the piston plate 25 pushes the gas in the cavity of the inflation groove 20 from the two air guide tubes 28 into the cavity of the two annular airbags 29, causing the annular airbags 29 to expand and compress the cable. The annular airbags 29 ensure the seal between the cable and the conduit 3. At the same time, the wing screw 23 on the turntable 21 is aligned with a fixing hole 43. Rotate the wing screw 23 to insert its threaded end into the fixing hole 43 to fix the turntable 21, screw 15 and spur gear 24. Finally, remove the sealing putty bag 12 on the plug screw cap 11 and remove the sealing putty from the sealing putty bag 12 to block the bottom of the inner cavity of the conduit 3, so as to strengthen the seal between the conduit 3 and the cable with the sealing putty. In addition, the wires in the main cable are connected to multiple copper busbars 35 respectively, and the wires in the branch cable are connected to the copper busbars 35 by the cooperation of the wiring rivet nut 37 and bolt, so as to realize the branching of the cable.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A low-voltage cable branch box with cable fixing, comprising a box body (1), characterized in that: The front and rear of the enclosure (1) are provided with door frames (42), the front and rear of the enclosure (1) are provided with door mechanisms (2), the inner cavity of the enclosure (1) is provided with a power distribution mechanism (6), the bottom of the enclosure (1) is fixedly sleeved with multiple conduits (3), the sides of the multiple conduits (3) are provided with fixing mechanisms (4), the sides of the multiple fixing mechanisms (4) are provided with sealing mechanisms (5), the sides of the conduits (3) are provided with multiple square grooves (9), the bottom ends of the multiple conduits (3) are respectively fixedly sleeved to the bottom of the enclosure (1) and provided with internal thread grooves (10), the inner cavity of the internal thread groove (10) is threaded with a plugging screw cap (11), and the inner side of the plugging screw cap (11) is provided with a sealing mud bag (12).

2. A low-voltage cable branch box with cable fixing as described in claim 1, characterized in that: The fixing mechanism (4) includes an outer fixing cover (14) and a rolling bearing (13) fixedly sleeved on the side of the conduit (3). A first bevel gear (18) is fixedly sleeved on the outer side of the rolling bearing (13). Multiple screws (15) are rotatably connected to the outer fixing cover (14). Extrusion square columns (16) are threadedly sleeved on the outer side of the ends of the multiple screws (15). The ends of the multiple extrusion square columns (16) extend through the square groove (9) to the inner cavity of the conduit (3). The inner wall of the square groove (9) fits against the side of the extrusion square column (16). A second bevel gear (17) is fixedly sleeved on the outer side of the screws (15). The second bevel gear (17) and the first bevel gear (18) mesh with each other. One end of a screw (15) extends to the outside of the outer fixing cover (14) and is fixedly connected to a turntable (21). A rotating block (22) is fixedly connected to the turntable (21).

3. A low-voltage cable branch box with cable fixing as described in claim 2, characterized in that: The sealing mechanism (5) includes an air box (19) fixedly connected to the side of the outer fixed cover (14). An air groove (20) is provided on the air box (19). A piston plate (25) is slidably connected to the inner cavity of the air groove (20). Two limiting plates (26) are fixedly connected to the side of the piston plate (25). The top and bottom surfaces of the two limiting plates (26) are respectively in contact with the inner wall of the air groove (20). A rack (27) is fixedly connected to the side of the piston plate (25). One end of a screw (15) passes through the inner cavity of the air groove (20). A spur gear (24) is fixedly sleeved on the side of the screw (15). 4) It meshes with the rack (27). Multiple fixing holes (43) are provided on the outside of the air box (19). A wing screw (23) is threaded on the turntable (21). One end of the wing screw (23) is movably sleeved into the inner cavity of a fixing hole (43). Two air guide tubes (28) are fixedly sleeved on the air box (19). One end of the two air guide tubes (28) extends into the inner cavity of the air groove (20). The other end of the two air guide tubes (28) is fixedly sleeved into the inner cavity of the threading tube (3) and fixedly connected to annular airbags (29). The two annular airbags (29) are fixedly sleeved into the inner cavity of the threading tube (3).

4. A low-voltage cable branch box with cable fixing as described in claim 1, characterized in that: The power distribution mechanism (6) includes two uprights (31) fixedly connected to the inner wall of the box (1). The two uprights (31) are equipped with mounting plates (32). Multiple sets of insulator support columns (34) are installed on the front of the mounting plates (32). Copper busbars (35) are installed on the multiple sets of insulator support columns (34). Multiple wiring crimp nuts (37) are provided on each copper busbar (35). Multiple sets of threaded holes (38) are provided on the mounting plates (32).

5. A low-voltage cable branch box with cable fixing as described in claim 1, characterized in that: The door mechanism (2) includes a hinge (39) fixedly installed on the box body (1), a sealed door (40) fixedly installed on the hinge (39), a sealing strip (41) fixedly connected to the inner side of the sealed door (40), and the side of the sealing strip (41) is in contact with the outer side of the box body (1).

6. A low-voltage cable branch box with cable fixing as described in claim 1, characterized in that: The bottom surface of the box (1) is fixedly connected with multiple support channel steels (7), and the bottom surface of the multiple support channel steels (7) is provided with multiple mounting holes (8).

7. A low-voltage cable branch box with cable fixing as described in claim 4, characterized in that: The mounting plate (32) is provided with multiple welding nuts (33), and hexagonal bolts (36) are fitted on the insulator support column (34) and copper busbar (35). One end of the hexagonal bolt (36) is threaded onto the welding nut (33).

8. A low-voltage cable branch box with cable fixing as described in claim 1, characterized in that: Multiple absorbent cottons (30) are fixedly sleeved on the inner side of the conduit (3).

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