A low-voltage cable branch box with a protective structure

Abstract

This invention relates to the field of cable branch box technology, specifically a low-voltage cable branch box with a protective structure. It includes a box body and three busbars evenly distributed inside the box body. Each end of the box body has a first bracket fixedly installed. One side of each of the first brackets is fixedly installed with a second bracket by bolts. A sliding seat is fixedly installed on the outside of each second bracket by bolts. A rotating shaft is fixedly installed inside one end of each sliding seat. A mounting frame is rotatably fitted around the rotating shaft. The mounting frame contains three evenly distributed mounting seats, a first operating mechanism, and a second operating mechanism. Each of the three mounting seats has a limit mechanism inside, and an adjustment mechanism is shared at the bottom of all three mounting seats. The beneficial effect of this invention is to solve the problem of the connecting bolts at both ends of the three busbars gradually loosening due to repeated lateral movement, affecting the connection effect between the three busbars and the cables.

Description

Technical Field

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

[0002] A low-voltage cable distribution box connects the low-voltage outgoing lines of a low-voltage switchgear or transformer to the incoming lines of the distribution box. The outgoing lines of the low-voltage cable distribution box are then connected to the respective low-voltage users or low-voltage electrical equipment. Low-voltage cable distribution boxes are typically made of galvanized steel, stainless steel, or engineering plastics, providing corrosion resistance, rust prevention, and weather resistance. The standard is IP34 (dustproof rating 3, splashproof rating 4), and outdoor models can reach IP65 (completely dustproof and splashproof).

[0003] The low-voltage cable branch box contains a three-phase busbar. Both ends of the busbar are connected to the cable terminals of the incoming and outgoing lines via bolts, responsible for introducing electrical energy from external cables into the branch box and distributing it to each outgoing circuit. Currently, the three-phase busbar inside the cable branch box is suspended after connection. When current flows through the busbar, periodic electrodynamic forces (like poles repel, unlike poles attract) are generated between the three phases. The surge current during a short circuit can cause a sharp increase in these electrodynamic forces. If there is no limit to the movement on both sides of the busbar, lateral movement can occur. The bolts connecting the two ends of the busbar may gradually loosen due to this repeated lateral movement, affecting the connection between the busbar and the cables. Summary of the Invention

[0004] The purpose of this invention is to provide a low-voltage cable branch box with a protective structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-voltage cable branch box with a protective structure, comprising a box body and three busbars evenly distributed inside the box body. A bracket is fixedly installed at both ends of the box body. A bracket is fixedly installed on one side of each of the two brackets by bolts. A sliding seat is fixedly installed on the outside of the brackets by bolts. A rotating shaft is fixedly installed inside one end of the sliding seat. A mounting frame is rotatably sleeved on the outside of the rotating shaft. Three evenly distributed mounting seats, a first operating mechanism, and a second operating mechanism are arranged inside the mounting frame. A limit mechanism is provided inside each of the three mounting seats. An adjustment mechanism is commonly provided at the bottom of the three mounting seats.

[0006] Preferably, the first operating mechanism includes a threaded rod, which is threadedly connected to the top of the mounting frame. An operating plate is threadedly connected to the outside of the threaded rod. Guide rods are slidably fitted at both ends of the operating plate. Both guide rods are fixedly connected to the mounting frame. A strip groove is formed at the end of the operating plate away from the threaded rod. Three slide rods are slidably arranged inside the strip groove. A top rod is fixedly installed at the bottom of each of the three slide rods. The three top rods are slidably installed on the top of the three mounting seats respectively.

[0007] Preferably, a positioning groove is provided at one end of the rotating shaft, and a positioning rod is fixedly installed at one end of the operating plate near the positioning groove, the positioning rod cooperating with the positioning groove.

[0008] Preferably, the limiting mechanism includes a first limiting plate, a second limiting plate, and a connecting assembly. The first and second limiting plates are slidably installed inside the mounting base. A spring is fixedly installed between the side of the first and second limiting plates that are far apart from each other and the inside of the mounting base. A limiting groove is formed on the side of the first and second limiting plates that are close to each other. Both limiting grooves cooperate with three busbars. A wedge block is fixedly installed on the top of the first limiting plate, and the wedge block cooperates with a corresponding top rod.

[0009] Preferably, the connecting assembly includes two vertical rods and a flipping rod. The two vertical rods are fixedly connected to a limiting plate one and a limiting plate two, respectively. Each of the two vertical rods has a strip groove two inside. The flipping rod is rotatably connected to a corresponding mounting base. Each end of the flipping rod is fixedly installed with a sliding rod two. The two sliding rods two cooperate with the two strip grooves two, respectively.

[0010] Preferably, the adjustment mechanism includes an adjustment base, which is slidably installed inside the mounting frame. The adjustment base has a T-shaped groove inside, and two T-shaped sliders are slidably installed inside the T-shaped groove. The tops of the two T-shaped sliders are fixedly connected to two mounting seats located at both ends, and the bottom of the mounting seat located in the middle is fixedly connected to the adjustment base. A telescopic bracket is provided at the bottom of the adjustment base. The middle part of the telescopic bracket is rotatably connected to the bottom of the mounting seat located in the middle position, and the two ends of the telescopic bracket are rotatably connected to the bottoms of the two mounting seats located at both ends.

[0011] Preferably, the bottom of the mounting frame has limit grooves at both ends, and limit sliders are slidably installed inside the two limit grooves. The tops of the two limit sliders are fixedly connected to the bottom of the adjusting base.

[0012] Preferably, the second operating mechanism includes a threaded rod 2, which is threadedly connected to the bottom of the mounting frame. An operating plate 2 is externally threaded to the threaded rod 2. Guide rods 2 are slidably sleeved at both ends of the operating plate 2. Both guide rods 2 are fixedly connected to the mounting frame. A rack 1, a rack 2, a rack 3, and two racks 4 are provided on the side of the operating plate 2 near the three mounting seats. Rack 1 and rack 3 are fixedly connected to the operating plate 2. Rack 2 is fixedly connected to the adjusting base. The two racks 4 are fixedly connected to the two mounting seats located at both ends, respectively. Rack 1 and rack 2 cooperate with each other, and rack 3 cooperates with the two racks 4 respectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. By setting three limiting mechanisms, the three busbars are laterally limited to prevent them from laterally moving when current flows through them due to the periodic electrodynamic force generated between the three phases. This solves the problem that the connecting bolts at both ends of the three busbars gradually loosen due to repeated lateral movement, which affects the connection effect between the three busbars and the cables.

[0015] 2. The three busbars are usually set at equal intervals to ensure the overall system is balanced. Through the adjustment mechanism and the second operating mechanism, the limiting mechanisms in the three mounting seats 8 can be adjusted at equal intervals according to the positions of the three busbars 2, so that the three limiting mechanisms can limit the busbars 2 at different intervals, thereby improving the overall applicability of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the combined structure of the busbar and mounting frame of the present invention;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the bottom structure of the mounting frame of the present invention;

[0020] Figure 5 This is a schematic diagram of the sliding seat structure of the present invention;

[0021] Figure 6 This is a schematic diagram of one side of the combined structure of the mounting base and adjustment mechanism of the present invention;

[0022] Figure 7 This is a schematic diagram of the combined structure of the mounting base and adjustment mechanism on the other side of the present invention;

[0023] Figure 8 This is a schematic diagram of the three mounting bases combined structure of the present invention;

[0024] Figure 9 This is a schematic diagram of one side of the mounting base of the present invention;

[0025] Figure 10 This is a schematic diagram of the adjusting base structure of the present invention;

[0026] Figure 11 This is a schematic diagram of the first operating mechanism and the second operating mechanism of the present invention.

[0027] The components represented by each number in the attached diagram are listed below: 1. Housing; 2. Busbar; 3. Bracket 1; 4. Bracket 2; 5. Sliding seat; 6. Rotating shaft; 7. Mounting frame; 8. Mounting base; 9. Threaded rod 1; 10. Operating panel 1; 11. Guide rod 1; 12. Strip groove 1; 13. Sliding rod 1; 14. Top rod; 15. Positioning groove; 16. Positioning rod; 17. Limiting plate 1; 18. Limiting plate 2; 19. Spring 20. Limiting groove; 21. Wedge block; 22. Vertical rod; 23. Strip groove II; 24. Flipping rod; 25. Slide rod II; 26. Adjusting base; 27. T-shaped slide groove; 28. T-shaped slider; 29. ​​Telescopic bracket; 30. Threaded rod II; 31. Operating panel II; 32. Guide rod II; 33. Rack I; 34. Rack II; 35. Rack III; 36. Rack IV; 37. Limiting groove; 38. Limiting slider. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] This invention provides a technical solution: such as Figures 1-11 The low-voltage cable branch box with a protective structure shown includes a box body 1 and three busbars 2 evenly distributed inside the box body 1. Both ends of the box body 1 are fixedly installed with brackets 3. One side of each bracket 3 is fixedly installed with brackets 4 by bolts. The outside of brackets 4 is fixedly installed with sliding seats 5 by bolts. A rotating shaft 6 is fixedly installed inside one end of the sliding seat 5. An installation frame 7 is rotatably sleeved on the outside of the rotating shaft 6. The installation frame 7 is provided with three evenly distributed mounting seats 8, a first operating mechanism and a second operating mechanism. Each of the three mounting seats 8 is provided with a limit mechanism. The bottom of the three mounting seats 8 is provided with an adjustment mechanism.

[0030] The first operating mechanism includes a threaded rod 9, which is threaded to the top of the mounting frame 7. An operating plate 10 is threaded to the outside of the threaded rod 9. Guide rods 11 are slidably fitted at both ends of the operating plate 10. Both guide rods 11 are fixedly connected to the mounting frame 7. A strip groove 12 is provided at the end of the operating plate 10 away from the threaded rod 9. Three slide rods 13 are slidably arranged inside the strip groove 12. A top rod 14 is fixedly installed at the bottom of each of the three slide rods 13. The three top rods 14 are slidably installed on the top of the three mounting seats 8 respectively.

[0031] A positioning groove 15 is provided at one end of the rotating shaft 6, and a positioning rod 16 is fixedly installed at the end of the operating plate 10 near the positioning groove 15. The positioning rod 16 and the positioning groove 15 cooperate with each other.

[0032] The limiting mechanism includes a first limiting plate 17, a second limiting plate 18, and a connecting assembly. Both the first limiting plate 17 and the second limiting plate 18 are slidably installed inside the mounting base 8. A spring 19 is fixedly installed between the side of the first limiting plate 17 and the side of the second limiting plate 18 that are far apart from each other and the inside of the mounting base 8. A limiting groove 20 is opened on the side of the first limiting plate 17 and the side of the second limiting plate 18 that are close to each other. Both limiting grooves 20 cooperate with the three busbars 2. A wedge block 21 is fixedly installed on the top of the first limiting plate 17. The wedge block 21 cooperates with the corresponding push rod 14.

[0033] The connecting assembly includes two vertical rods 22 and a flipping rod 24. The two vertical rods 22 are fixedly connected to the first limiting plate 17 and the second limiting plate 18, respectively. The interior of each of the two vertical rods 22 is provided with a strip groove 23. The flipping rod 24 is rotatably connected to the corresponding mounting base 8. The two ends of the flipping rod 24 are fixedly installed with slide rods 25. The two slide rods 25 cooperate with the two strip grooves 23, respectively.

[0034] The adjustment mechanism includes an adjustment base 26, which is slidably installed inside the mounting frame 7. The adjustment base 26 has a T-shaped groove 27 inside, and two T-shaped sliders 28 are slidably installed inside the T-shaped groove 27. The tops of the two T-shaped sliders 28 are fixedly connected to two mounting seats 8 located at both ends, and the bottom of the mounting seat 8 located in the middle is fixedly connected to the adjustment base 26. A telescopic bracket 29 is provided at the bottom of the adjustment base 26. The middle part of the telescopic bracket 29 is rotatably connected to the bottom of the mounting seat 8 located in the middle position, and the two ends of the telescopic bracket 29 are rotatably connected to the bottoms of the two mounting seats 8 located at both ends.

[0035] Limiting grooves 37 are provided at both ends of the bottom of the mounting frame 7. Limiting sliders 38 are slidably installed inside the two limiting grooves 37. The tops of the two limiting sliders 38 are fixedly connected to the bottom of the adjusting base 26.

[0036] The second operating mechanism includes a threaded rod 30, which is threaded to the bottom of the mounting frame 7. An operating plate 31 is threaded to the outside of the threaded rod 30. Guide rods 32 are slidably fitted at both ends of the operating plate 31. Both guide rods 32 are fixedly connected to the mounting frame 7. On the side of the operating plate 31 near the three mounting seats 8, there are racks 33, 34, 35, and two racks 36. Racks 33 and 35 are fixedly connected to the operating plate 31. Rack 34 is fixedly connected to the adjusting base 26. The two racks 36 are fixedly connected to the two mounting seats 8 at both ends. Racks 33 and 34 cooperate with each other, and racks 35 cooperate with the two racks 36.

[0037] Working principle: When in use, first fix bracket 2 4 at a suitable height between two brackets 1 3 with bolts according to the height of the three busbars 2. Then slide the sliding seat 5 along bracket 2 4 according to the position of the three busbars 2. Then fix the sliding seat 5 between bracket 2 4 with bolts.

[0038] The three busbars 2 are usually equidistant to ensure the overall system is balanced. Based on the position of the three busbars 2, the positions of the three mounting seats 8 and the adjusting base 26 are pre-adjusted. When adjusting the position of the three mounting seats 8, pull any one end of the mounting seat 8. Under the action of the telescopic bracket 29, the other end of the mounting seat 8 moves synchronously, and the distance between the three mounting seats 8 can be adjusted synchronously. While the three mounting seats 8 move, they drive the slide rod 13 at the top end to slide inside the strip groove 12. When adjusting the adjusting base 26, the two limiting sliders 38 at the bottom slide inside the two limiting grooves 37 respectively. Then, rotate the mounting frame 7. One end of the mounting frame 7 rotates around the rotation axis 6 until the mounting frame 7 rotates to be perpendicular to the bracket 3. At this time, the three limiting mechanisms correspond to the three busbars 2 respectively.

[0039] Subsequently, rotating the threaded rod 9 causes the operating plate 10 to move to one side of the three mounting seats 8 under the action of the two guide rods 11. This moves the three sliding rods 13 and the three push rods 14 synchronously. The three push rods 14 act on the three wedge blocks 21 respectively. The movement process of one of the limiting mechanisms is as follows: At this time, the limiting plate 17 and the limiting plate 28 are located on both sides of one of the busbars 2. As the push rod 14 acts on the wedge block 21, the wedge block 21 is forced to slide the limiting plate 17 inside the mounting seat 8. The spring 19 on one side of the limiting plate 17 is stretched. As the limiting plate 17 moves, it drives the vertical rod 22 connected to it to move synchronously. The sliding rod 25 inside the vertical rod 22 moves in the corresponding position. The sliding groove 23 slides inside, the flipping rod 24 rotates, and the other end of the flipping rod 24 acts on the vertical rod 22 in the limiting plate 28. At this time, the limiting plate 17 and the limiting plate 28 move towards each other synchronously. The two ends of the busbar 2 are respectively located inside the two limiting grooves 20, thereby limiting the busbar 2 laterally. The movement process of the other two limiting mechanisms is the same as above. The three busbars 2 complete the lateral limiting at the same time, avoiding the situation where the three busbars 2 move laterally due to the periodic electrodynamic force generated between the three phases when current is flowing through them. This solves the problem that the connecting bolts at both ends of the three busbars 2 gradually loosen due to repeated lateral movement, affecting the connection effect between the two ends of the three busbars 2 and the cable.

[0040] As the control panel 10 moves, the positioning rod 16 at one end moves synchronously. When the control panel 10 moves to the limit position, the positioning rod 16 is fully inserted into the positioning groove 15, thereby fixing the position of the mounting frame 7.

[0041] Next, rotating the threaded rod 30, under the action of the two guide rods 32, the operating plate 31 drives the rack 33 and rack 35 to move to one side of the adjusting base 26. When the operating plate 31 moves to the limit position, the rack 33 inserts into the rack 34, thus fixing the adjusting base 26. The two ends of the rack 35 are respectively inserted into the two racks 36, thus fixing the two mounting seats 8 located at both ends. Thus, the limiting of the three busbars 2 is completed. Through the set adjustment mechanism and the second operating mechanism, the limiting mechanism in the three mounting seats 8 can be adjusted at equal intervals according to the position of the three busbars 2, so that the three limiting mechanisms can limit the busbars 2 at different intervals, improving the overall applicability of the device.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-voltage cable branch box with a protective structure, comprising a box body (1) and three busbars (2) evenly distributed in the interior of the box body (1), characterized in that: Both ends of the box (1) are fixedly provided with a support one (3), one side of the two support ones (3) is fixedly provided with a support two (4) through bolts, the outer side of the support two (4) is fixedly provided with a sliding seat (5) through bolts, the inner side of one end of the sliding seat (5) is fixedly provided with a rotating shaft (6), the outer side of the rotating shaft (6) is rotatably provided with a mounting frame (7), the inner side of the mounting frame (7) is provided with three mounting seats (8) which are evenly distributed, a first operating mechanism and a second operating mechanism, the inner side of each of the three mounting seats (8) is provided with a limiting mechanism, and the bottom of each of the three mounting seats (8) is provided with an adjusting mechanism. The first operating mechanism comprises a threaded rod one (9), the threaded rod one (9) is threadedly connected to the top of the mounting frame (7), the outer side of the threaded rod one (9) is threadedly connected with an operating plate one (10), both ends of the operating plate one (10) are slidably provided with a guide rod one (11), the two guide rod ones (11) are fixedly connected with the mounting frame (7), one end of the operating plate one (10) away from the threaded rod one (9) is provided with a strip-shaped sliding groove one (12), three slide rods one (13) are slidably arranged in the strip-shaped sliding groove one (12), the bottom of each of the three slide rods one (13) is fixedly provided with a jacking rod (14), the three jacking rods (14) are slidably arranged at the top of the three mounting seats (8) respectively, and the three jacking rods (14) are matched with wedge-shaped blocks (21) in the limiting mechanism. The second operating mechanism comprises a threaded rod two (30), the threaded rod two (30) is threadedly connected to the bottom of the mounting frame (7), the outer side of the threaded rod two (30) is threadedly connected with an operating plate two (31), both ends of the operating plate two (31) are slidably provided with a guide rod two (32), the two guide rod twos (32) are fixedly connected with the mounting frame (7), one side of the operating plate two (31) close to the three mounting seats (8) is provided with a rack one (33), a rack two (34), a rack three (35) and two rack fours (36), the rack one (33) and the rack three (35) are fixedly connected with the operating plate two (31), the rack two (34) is fixedly connected with an adjusting base (26) in the adjusting mechanism, the two rack fours (36) are fixedly connected with the two mounting seats (8) at both ends respectively, the rack one (33) is matched with the rack two (34), and the rack three (35) is matched with the two rack fours (36) respectively.

2. The low-voltage cable branch box with a protective structure according to claim 1, characterized in that: One end of the rotating shaft (6) is provided with a positioning groove (15), one end of the operating plate one (10) close to the positioning groove (15) is fixedly provided with a positioning rod (16), and the positioning rod (16) is matched with the positioning groove (15).

3. The low-voltage cable branch box with a protective structure according to claim 1, characterized in that: The limiting mechanism includes a limiting plate one (17), a limiting plate two (18) and a connecting assembly, the limiting plate one (17) and the limiting plate two (18) are both slidingly installed in the inside of the mounting seat (8), the side, away from each other, of the limiting plate one (17) and the limiting plate two (18) is fixedly installed with the spring (19) between the inside of the mounting seat (8), the side, close to each other, of the limiting plate one (17) and the limiting plate two (18) is provided with a limiting groove (20), the two limiting grooves (20) are matched with the three female buses (2), the top of the limiting plate one (17) is fixedly installed with a wedge-shaped block (21), the wedge-shaped block (21) is matched with the corresponding top rod (14).

4. The low-voltage cable branch box with a protective structure according to claim 3, characterized in that: The connecting assembly includes two vertical rods (22) and a turnover rod (24), the two vertical rods (22) are respectively fixedly connected with the limiting plate one (17) and the limiting plate two (18), the inside of the two vertical rods (22) is provided with a strip-shaped sliding slot two (23), the turnover rod (24) is rotatably connected with the corresponding mounting seat (8), the two ends of the turnover rod (24) are fixedly installed with a sliding rod two (25), the two sliding rod twos (25) are respectively matched with the two strip-shaped sliding slot twos (23).

5. The low-voltage cable branch box with a protective structure according to claim 1, characterized in that: The adjusting mechanism includes an adjusting base (26), the adjusting base (26) is slidingly installed in the inside of the mounting frame (7), the inside of the adjusting base (26) is provided with a T-shaped sliding slot (27), the inside of the T-shaped sliding slot (27) is slidingly installed with two T-shaped sliding blocks (28), the top of the two T-shaped sliding blocks (28) is respectively fixedly connected with the two mounting seats (8) at both ends, the bottom of the mounting seat (8) in the middle is fixedly connected with the adjusting base (26), the bottom of the adjusting base (26) is provided with a telescopic support (29), the middle part of the telescopic support (29) is rotatably connected with the bottom of the mounting seat (8) in the middle, the two ends of the telescopic support (29) are respectively rotatably connected with the bottoms of the two mounting seats (8) at both ends.

6. A low voltage cable branch box having a protective structure according to claim 5, characterized in that: The bottom of the mounting frame (7) is provided with a limiting sliding slot (37) at both ends, the inside of the two limiting sliding slots (37) is slidingly installed with a limiting sliding block (38), the top of the two limiting sliding blocks (38) is fixedly connected with the bottom of the adjusting base (26).

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