Wall-mounted low voltage pole-mounted junction box

Abstract

The present invention discloses a wall-mounted low-voltage column-mounted branch box, which belongs to the field of electric power technology. When the existing busbars are connected, it is difficult to switch between the power-on and power-off states. The present invention includes a branch box, a plurality of porcelain bushings and a plurality of first busbars, and the plurality of porcelain bushings and the plurality of first busbars are all installed on the branch box. There is a set spacing between the busbar at the outlet end of the porcelain bushing and the corresponding first busbar. A connection assembly, a top pressure assembly and a drive assembly are installed in the branch box; the drive assembly drives the first rack to move, and controls the second busbar to overlap the busbar at the outlet end of the porcelain bushing and the first busbar. At the same time, the first rack is transmitted through the top pressure assembly to control the fourth insulating block to press against the second busbar until the pressure sensor detects the set pressure value, so as to maintain the stability of the contact between the second busbar and the busbar at the outlet end of the porcelain bushing and the first busbar, and effectively reduce the difficulty of inspection and maintenance of the branch box by automatically controlling the on and off of the busbar at the outlet end of the porcelain bushing and the first busbar.

Description

Technical Field

[0001] The invention relates to the field of electric power technology, and more specifically to a wall-mounted low-voltage pole-mounted branch box. Background Art

[0002] In residential areas, for the convenience of wiring, multiple service lines are led down from a single utility pole to the user's home. However, the copper-aluminum service line clamp can only connect one service line, which causes wiring confusion and other problems.

[0003] The document with the prior art publication number CN112564028A provides a low-voltage pole-mounted branch box, which can lead multiple household lines through one position of the main conductor, and will not cause repeated damage to the overhead wires. However, the porcelain bushing outlet end of the branch box is fixedly connected to the busbar. When the branch box is annually inspected or fault-checked, it is necessary to cut off the power to ensure the safety of the maintenance personnel. The fixedly connected busbar will increase the difficulty of the power-off operation. In view of this, we propose a wall-mounted low-voltage pole-mounted branch box. Summary of the invention

[0004] The purpose of the present invention is to provide a wall-mounted low-voltage pole-mounted distribution box, which solves the technical problem in the prior art that it is difficult to switch between the power-on and power-off states when the busbar is connected.

[0005] The embodiment of the present invention provides a wall-mounted low-voltage column-mounted branch box, comprising a branch box, a plurality of porcelain bushings and a plurality of first busbars, wherein the plurality of porcelain bushings and the plurality of first busbars are all installed on the branch box, a set spacing exists between the busbars at the outlet ends of the porcelain bushings and the corresponding first busbars, and a connection assembly, a top pressure assembly and a drive assembly are installed in the branch box;

[0006] The connection assembly includes a plurality of fixing frames, a third insulating block and a first rack, wherein the plurality of fixing frames are fixedly mounted on the first rack, the first rack is slidably connected to the branch box, the third insulating block is mounted on the fixing frame, and the second busbar is fixedly mounted on the third insulating block;

[0007] The top pressure assembly includes a plurality of first gears, which are all meshed with the first rack for transmission, a screw rod is fixedly connected to the first gear, the screw rod is rotatably connected to the branch box, a support frame is threadedly matched on the screw rod, the support frame is slidably connected to the branch box, two groups of pressure sensors are fixedly installed on the support frame, and a fourth insulating block is fixedly connected to the test end of the pressure sensor;

[0008] The output end of the driving assembly drives the first rack to move, controls the second busbar to overlap the busbar at the outlet end of the porcelain bushing and the first busbar at the same time, so that the busbar at the outlet end of the porcelain bushing and the first busbar are electrically connected, and the first rack is transmitted through the pressing assembly to control the fourth insulating block to press the second busbar tightly.

[0009] Preferably, the lap surface of the busbar at the outlet end of the porcelain bushing and the first busbar are in the same plane, the length of the second busbar is greater than the spacing between the busbar at the outlet end of the porcelain bushing and the first busbar, and the second busbar is arranged parallel to the first busbar.

[0010] Preferably, the branch box comprises a box body, the porcelain bushing is fixedly mounted on the top of the box body, the first busbar is fixedly mounted inside the box body through an insulating rod, a first insulating block and a second insulating block are fixedly mounted inside the box body, the busbar at the outlet end of the porcelain bushing is plugged into the upper limit of the first insulating block, and the end of the first busbar is plugged into the upper limit of the second insulating block;

[0011] The fixing frame is slidably connected to the first insulating block, the first rack is slidably connected to the box body, the screw rod is rotationally connected to the box body, and the supporting frame is slidably connected to the first insulating block.

[0012] Preferably, a plurality of support rods are fixedly mounted on the fixing frame, the third insulating block is slidably connected to the corresponding support rods, a first elastic member is sleeved on the support rods, one end of the first elastic member is fixedly connected to the third insulating block, and the other end is fixedly connected to the fixing frame.

[0013] Preferably, a plurality of positioning grooves are provided on the third insulating block, a support block is slidably connected in the box body, a guide rod is fixedly installed on the support frame, the guide rod is slidably connected to the support block, a second elastic member is sleeved on the guide rod, one end of the second elastic member is fixedly connected to the guide rod, and the other end is fixedly connected to the support block;

[0014] A plurality of limiting components are installed on the support block, and the limiting components are inserted into corresponding positioning grooves for positioning the third insulating block.

[0015] Preferably, the plurality of positioning grooves are not on the same horizontal plane.

[0016] Preferably, the driving assembly includes a motor, a second gear and a third gear, the motor is fixedly installed in the casing, the second gear is rotatably connected to the support tube on the casing, the third gear is rotatably connected to the casing, the second gear and the third gear are meshingly transmitted, the third gear is meshingly transmitted with the first rack, the output shaft of the motor is fixedly connected to the transmission shaft, the transmission shaft is slidably connected to a first limiting column, the first limiting column is inserted in the second gear for driving the second gear to rotate, a third elastic member is mounted in the first limiting column, one end of the third elastic member is fixedly connected to the transmission shaft, and the other end is fixedly connected to the first limiting column.

[0017] Preferably, a control assembly is further included, the control assembly including a fixed block, a first guide frame and a second guide frame, the fixed block and the first guide frame are both fixedly mounted on the second insulating block, the second guide frame is fixedly mounted on the fixed block, a connecting pipe is slidably connected to the second guide frame, a push rod is rotatably connected to the connecting pipe, and an end of the push rod passes through the fixed block and is fixedly connected to the second limiting column;

[0018] A fourth elastic member is mounted on the top rod, one end of the fourth elastic member is fixedly connected to the fixed block, and the other end is fixedly connected to the connecting pipe, a second rack is slidably connected to the first guide frame, a fourth gear is rotatably connected to the first guide frame, a top plate is fixedly connected to the second rack, the top plate is located between the second insulating block and the support block, and is used to limit the support block and control the movement of the support block, a third rack is slidably connected to the second guide frame, the second rack and the third rack are both meshed with the fourth gear for transmission, and the movement directions of the second rack and the third rack are opposite, and the second rack and the first guide frame are fixed by a limit pin.

[0019] Preferably, the second limiting column and the first limiting column are both prisms and their axes are collinear.

[0020] Preferably, the limit assembly includes an electromagnet and a plurality of support columns, which are fixedly mounted on a support block, a positioning column is slidably connected to the support column, the positioning column is inserted into a corresponding positioning groove to position the third insulating block, a fifth elastic member is arranged in the positioning column, one end of the fifth elastic member is fixedly connected to the support column, and the other end is fixedly connected to the positioning column, and an armature is fixedly mounted on the positioning column.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. The output end of the driving assembly of the present invention drives the first rack to move, controls the second busbar to overlap the busbar at the outlet end of the porcelain bushing and the first busbar, and realizes the electrical connection between the busbar at the outlet end of the porcelain bushing and the first busbar. At the same time, the first rack controls the fourth insulating block to press the second busbar tightly through the transmission with the pressing assembly until the pressure sensor detects the set pressure value, thereby maintaining the stability of the contact between the second busbar and the busbar at the outlet end of the porcelain bushing and the first busbar, thereby ensuring the stability of power transmission. By automatically controlling the on and off of the busbar at the outlet end of the porcelain bushing and the first busbar, the difficulty of inspection and maintenance of the junction box is effectively reduced.

[0023] 2. The present invention sets the third insulating block on the fixed frame by sliding. When the fourth insulating block is subsequently driven to press against the second busbar, the second busbar can keep its position unchanged. At the same time, a limiting component is provided to insert the third insulating block to limit the second busbar, thereby avoiding relative movement between the second busbar and the busbar at the outlet end of the porcelain bushing and the first busbar when vibration occurs, thereby further improving the contact stability.

[0024] 3. The operation of the present invention includes electric operation and manual operation. In an emergency, the second busbar and the busbar at the outlet of the porcelain bushing can be separated from the first busbar by manual operation, thereby achieving power off.

[0025] 4. In the present invention, when the pressure value of the pressure sensor is lower than the set threshold value, it indicates that the corresponding second busbar has poor contact with the busbar at the outlet of the porcelain bushing or the first busbar. By monitoring the pressure value, an early warning of power connection can be achieved. At the same time, the pressure sensor can also be used for the rotation calibration of the motor. When the first limit column is disengaged from the second gear and inserted into it again, the first rack may have moved under the influence of several elastic parts, thereby causing the position of the second busbar to be uncertain. Therefore, when the motor resumes normal working state, it first drives the second busbar to contact with the busbar at the outlet of the porcelain bushing and the first busbar until the pressure value of the pressure sensor reaches the set value. At this time, the motor performs initial position calibration, thereby realizing subsequent precise control of the movement of the second busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the porcelain bushing and busbar installation structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the positions of the porcelain bushing and the busbar of the present invention.

[0028] Figure 3 It is a partial structural schematic diagram of the present invention.

[0029] Figure 4 It is a schematic diagram of the transmission structure of the connecting assembly of the present invention.

[0030] Figure 5 It is a schematic diagram of the working position of the second busbar of the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the top pressing assembly of the present invention.

[0032] Figure 7 It is a schematic diagram of the connection structure of the limit assembly of the present invention.

[0033] Figure 8 It is a partial structural schematic diagram of the driving component of the present invention.

[0034] Fig. 9 It is a schematic diagram of the control component structure of the present invention.

[0035] Fig.10 It is a cross-sectional view of the control assembly of the present invention.

[0036] Explanation of the reference numerals in the figure: 1. branch box; 2. porcelain bushing; 3. first busbar; 4. connection assembly; 5. top pressure assembly; 6. drive assembly; 7. control assembly; 8. limit assembly; 11. box; 12. first insulating block; 13. second insulating block; 14. limit groove; 15. support block; 16. ear; 17. support tube; 41. fixing frame; 42. support rod; 43. third insulating block; 44. second busbar; 45. first elastic member; 46. positioning groove; 47. first rack; 51. first gear; 52. screw rod; 53. support frame; 54. pressure sensor; 55 , fourth insulating block; 56, guide rod; 57, second elastic member; 61, motor; 62, second gear; 63, third gear; 64, transmission shaft; 65, first limiting column; 66, third elastic member; 71, fixing block; 72, first guide frame; 73, second guide frame; 74, connecting pipe; 75, push rod; 76, second limiting column; 77, fourth elastic member; 78, second rack; 79, fourth gear; 81, electromagnet; 82, support column; 83, positioning column; 84, fifth elastic member; 85, armature; 710, top plate; 711, third rack; 712, through hole. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Reference Figures 1 to 3The present embodiment discloses a wall-mounted low-voltage column-mounted branch box, including a branch box 1, a plurality of porcelain bushings 2 and a plurality of first busbars 3. In the present embodiment, the number of the porcelain bushings 2 and the first busbars 3 are both four groups and the positions correspond one to one. The branch box 1 includes a box body 11, the porcelain bushings 2 are fixedly installed on the top of the box body 11, the first busbar 3 is fixedly installed inside the box body 11 through an insulating rod, and the access end of the porcelain bushing 2 is connected to the corresponding three-phase main conductor and the neutral conductor. A first insulating block 12 and a second insulating block 13 are fixedly installed in the box body 11. The first insulating block 12 and the second insulating block 13 are arranged in parallel, and there is a certain distance between the two. The first insulating block 12 and the second insulating block 13 are both provided with a limiting groove 14. The first insulating block 1 2 and the limiting groove 14 on the second insulating block 13 correspond to each other one by one, the limiting groove 14 on the first insulating block 12 is located directly above the limiting groove 14 on the second insulating block 13, the busbar at the outlet end of the porcelain bushing 2 is plugged into the limiting groove 14 of the first insulating block 12, and the three-sided limit of the busbar at the outlet end of the porcelain bushing 2 is set, the end of the first busbar 3 is plugged into the limiting groove 14 on the second insulating block 13, and the three-sided limit of the first busbar 3 is set. The lap surface of the busbar at the outlet end of the porcelain bushing 2 and the first busbar 3 are in the same plane, and there is a certain distance between the two. A support block 15 is slidably connected in the box body 11, and a lug 16 is fixedly installed on the box body 11 for wall-mounted installation and fixation of the box body 11.

[0039] Reference Figures 2 to 5 The branch box also includes a connection assembly 4, which includes a plurality of fixing frames 41, a third insulating block 43 and a first rack 47. The plurality of fixing frames 41 are fixedly mounted on the first rack 47, the fixing frames 41 are slidably connected to the first insulating block 12, the first rack 47 is slidably connected to the box body 11 through a guide rail, a plurality of support rods 42 are fixedly mounted on the fixing frames 41, the third insulating block 43 is slidably connected to the corresponding support rods 42, a second busbar 44 is fixedly mounted on the third insulating block 43, the length of the second busbar 44 is greater than the spacing between the busbar at the outlet end of the porcelain bushing 2 and the first busbar 3, and the second busbar 44 is arranged parallel to the first busbar 3, a first elastic member 45 is mounted on the support rod 42, one end of the first elastic member 45 is fixedly connected to the third insulating block 43, and the other end is fixedly connected to the fixing frame 41, a plurality of positioning grooves 46 are provided on the third insulating block 43, and the plurality of positioning grooves 46 are not on the same horizontal plane. When the first rack 47 moves, it drives the fixed frame 41 to move. Under the push of the first elastic member 45, the third insulating block 43 and the second busbar 44 follow the movement. The two ends of the second busbar 44 are respectively overlapped on the output busbar of the porcelain bushing 2 and the first busbar 3, thereby realizing the electrical connection between the output busbar of the porcelain bushing 2 and the first busbar 3.

[0040] Reference Figures 3 to 7The branch box also includes a top pressure assembly 5, which includes a plurality of first gears 51, which are all meshed with the first rack 47 for transmission, a screw rod 52 is fixedly connected to the first gear 51, and the screw rod 52 is rotatably connected to the box body 11, and a support frame 53 is threadedly matched on the screw rod 52, and the support frame 53 is slidably connected to the first insulating block 12, and two groups of pressure sensors 54 are fixedly installed on the side of the support frame 53 close to the first gear 51, and the test end of the pressure sensor 54 is fixedly connected to the fourth insulating block 55, and a guide rod 56 is fixedly installed on the support frame 53, and the guide rod 56 is slidably connected to the support block 15, and a second elastic member 57 is mounted on the guide rod 56, and one end of the second elastic member 57 is fixedly connected to the guide rod 56, and the other end is fixedly connected to the support block 15. The first rack 47 drives a plurality of first gears 51 and a screw rod 52 to rotate, and drives the support frame 53, the pressure sensor 54 and the fourth insulating block 55 to move through the transmission. The fourth insulating block 55 presses the second busbar 44 overlapped on the output end busbar of the porcelain bushing 2 and the first busbar 3 to the pressure sensor 54 to the set pressure value, thereby improving the stability of power supply.

[0041] Reference Figure 3 , Figure 4 and Figure 8 The branch box also includes a driving assembly 6, which includes a motor 61, a second gear 62 and a third gear 63. The motor 61 is fixedly installed in the box body 11, the second gear 62 is rotatably connected to the support tube 17 on the box body 11, the third gear 63 is rotatably connected to the box body 11, the second gear 62 and the third gear 63 are meshed for transmission, and the third gear 63 is meshed for transmission with the first rack 47. The output shaft of the motor 61 is fixedly connected to a transmission shaft 64, and a first limiting column 65 is slidably connected to the transmission shaft 64. The first limiting column 65 is inserted into the second gear 62 for driving the second gear 62 to rotate. A third elastic member 66 is mounted in the first limiting column 65, one end of the third elastic member 66 is fixedly connected to the transmission shaft 64, and the other end is fixedly connected to the first limiting column 65. The third elastic member 66 is used to push the first limiting column 65 to move in a direction away from the motor 61. The output shaft of the motor 61 drives the transmission shaft 64, the first limit column 65 and the second gear 62 to rotate, and drives the third gear 63 and the first rack 47 to move through meshing transmission, thereby achieving simultaneous movement control of the second busbar 44 and the fourth insulating block 55.

[0042] Reference Figure 1 , Fig. 9 and Fig.10The junction box also includes a control assembly 7, which includes a fixed block 71, a first guide frame 72 and a second guide frame 73. The fixed block 71 and the first guide frame 72 are both fixedly mounted on the second insulating block 13, and the second guide frame 73 is fixedly mounted on the fixed block 71. The first guide frame 72 and the second guide frame 73 are arranged in parallel. A connecting pipe 74 is slidably connected to the second guide frame 73, and a top rod 75 is rotatably connected to the connecting pipe 74. The end of the top rod 75 passes through the fixed block 71 and is fixedly connected to a second limiting column 76. The second limiting column 76 and the first limiting column 65 are both prisms and their axes are colinear. A fourth elastic member 77 is mounted on the top rod 75. One end of the fourth elastic member 77 is fixedly connected to the fixed block 71, and the other end is fixed to the connecting pipe 74. The first guide frame 72 is connected with a second rack 78 in a sliding connection, and the first guide frame 72 is rotatably connected with a fourth gear 79. The second rack 78 is fixedly connected with a top plate 710, and the top plate 710 is located between the second insulating block 13 and the support block 15, and is used to limit the support block 15 and control the movement of the support block 15. The second guide frame 73 is connected with a third rack 711 in a sliding connection, and the second rack 78 and the third rack 711 are both meshed with the fourth gear 79 for transmission, and the movement directions of the second rack 78 and the third rack 711 are opposite. The second rack 78 and the first guide frame 72 are provided with a through hole 712, and a limit pin is inserted into the through hole 712 to fix the second rack 78 and the first guide frame 72, and a hand wheel is fixedly installed on the end of the top rod 75. When the second busbar 44 is manually controlled to disconnect, after removing the limit pin, push the hand wheel and the push rod 75 to drive the second limit column 76 to push the first limit column 65 to move backward. After the second limit column 76 is inserted into the second gear 62, the hand wheel is turned to control the rotation of the second gear 62 and realize the manual emergency operation process.

[0043] Reference Figure 4 and Figure 7 The junction box also includes a plurality of limit assemblies 8. The number of limit assemblies 8 in this embodiment is four groups, corresponding to the positions of the third insulating block 43. The limit assemblies 8 include an electromagnet 81 and a plurality of support columns 82. The electromagnet 81 and the plurality of support columns 82 are fixedly mounted on the support block 15. A positioning column 83 is slidably connected to the support column 82. The positioning column 83 is inserted into the corresponding positioning groove 46 to position the third insulating block 43. A fifth elastic member 84 is arranged in the positioning column 83. One end of the fifth elastic member 84 is fixedly connected to the support column 82, and the other end is fixedly connected to the positioning column 83. The fifth elastic member 84 is used to push the positioning column 83 to move in the direction away from the electromagnet 81 on the support column 82. An armature 85 is fixedly mounted on the end of the positioning column 83 close to the electromagnet 81. After the electromagnet 81 is energized, the armature 85 drives the positioning column 83 to move in the direction of the electromagnet 81, the fifth elastic member 84 is compressed, and the positioning column 83 is separated from the positioning groove 46, thereby realizing the release of the positioning of the third insulating block 43.

[0044] Working principle: the output shaft of the motor 61 drives the transmission shaft 64, the first limit column 65 and the second gear 62 to rotate, and drives the third gear 63 and the first rack 47 to move through meshing transmission, and the first rack 47 drives the fixed frame 41 to move. Under the push of the first elastic member 45, the third insulating block 43 and the second busbar 44 follow the movement, so that the two ends of the second busbar 44 are respectively overlapped on the output end busbar of the porcelain bushing 2 and the first busbar 3.

[0045] The first rack 47 drives the fixing frame 41 to move, and also drives the first gear 51 and the screw rod 52 to rotate. The screw rod 52 drives the support frame 53, the pressure sensor 54, the fourth insulating block 55 and the guide rod 56 to move toward the second busbar 44 through threaded transmission. The guide rod 56 compresses the second elastic member 57, thereby pushing the support block 15 to move. The support block 15 drives the positioning column 83 to push against the surface of the second busbar 44 until the positioning column 83 is inserted into the corresponding positioning groove 46. The end of the third insulating block 43 abuts against the support frame 53. At this time, the two ends of the second busbar 44 complete the overlap with the outlet busbar of the porcelain bushing 2 and the first busbar 3.

[0046] The first rack 47 continues to move, and the fixing frame 41 drives the first elastic member 45 to be compressed. The fourth insulating blocks 55 contact the two ends of the second busbar 44 and press the pressure value of the pressure sensor 54 to the set threshold value, completing the electrical connection operation between the output busbar of the porcelain bushing 2 and the first busbar 3. At this time, the support block 15 is limited by the top plate 710.

[0047] When the output busbar of the porcelain bushing 2 is disconnected from the first busbar 3, the electromagnet 81 is energized, the armature 85 drives the positioning column 83 to disengage from the positioning groove 46, the third insulating block 43 is contacted, and the output shaft of the motor 61 rotates in the opposite direction to reset the second busbar 44 and the fourth insulating block 55, thereby realizing the power-off operation.

[0048] When the motor 61 and the electromagnet 81 fail to work, manual power-off is required. Specifically, the limit pin in the through hole 712 is removed, and the hand wheel and the top rod 75 are pushed to drive the second limit column 76 to move toward the second gear 62. The second limit column 76 is inserted into the second gear 62 and drives the first limit column 65 to move backward and disengage from the second gear 62. When the top rod 75 moves toward the second gear 62, the third rack 711 follows and drives the fourth gear 79 to rotate through meshing transmission. The fourth gear 79 drives the second rack 78 and the top plate 710 to move in the opposite direction of the second gear 62. The top plate 710 drives the support block 15 to move and compress the second elastic member 57 until the positioning column 83 disengages from the positioning groove 46 and the third insulating block 43 is limited. The hand wheel is turned to control the second gear 62 to rotate, thereby driving the second busbar 44 and the fourth insulating block 55 to reset, completing the manual emergency power-off operation.

[0049] It should be noted that when the pressure value of the pressure sensor 54 is lower than the set threshold, it indicates that the corresponding second busbar 44 has poor contact with the busbar at the outlet of the porcelain bushing 2 or the first busbar 3. The pressure sensor 54 can send a signal to the controller, and the controller transmits the signal to the monitoring platform through the wireless transmission module, thereby realizing real-time monitoring and early warning capabilities. At the same time, the pressure sensor 54 is also used for the rotation calibration of the motor 61. When the first limit column 65 is disengaged from the second gear 62 and then inserted into it again, under the influence of several elastic parts, the first rack 47 may have moved, thereby causing the position of the second busbar 44 to be uncertain. Therefore, when the motor 61 resumes normal working state, it first drives the second busbar 44 to contact with the busbar at the outlet of the porcelain bushing 2 and the first busbar 3 until the pressure value of the pressure sensor 54 reaches the set value. At this time, the motor 61 performs initial position calibration, thereby realizing subsequent precise control of the movement of the second busbar 44.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Wall-mounted low-voltage column-mounted junction box, characterized by: The invention comprises a branch box (1), a plurality of porcelain bushings (2) and a plurality of first busbars (3), wherein the plurality of porcelain bushings (2) and the plurality of first busbars (3) are all installed on the branch box (1), a set spacing exists between the busbars at the outlet ends of the porcelain bushings (2) and the corresponding first busbars (3), and a connection assembly (4), a top pressure assembly (5) and a drive assembly (6) are installed in the branch box (1); The connection assembly (4) comprises a plurality of fixing frames (41), a third insulating block (43) and a first rack (47); the plurality of fixing frames (41) are fixedly mounted on the first rack (47); the first rack (47) is slidably connected to the branch box (1); the third insulating block (43) is mounted on the fixing frame (41); and the second busbar (44) is fixedly mounted on the third insulating block (43); The pressing assembly (5) comprises a plurality of first gears (51), each of which is meshed with a first rack (47) for transmission; a screw rod (52) is fixedly connected to the first gear (51), the screw rod (52) is rotatably connected to the branch box (1), a support frame (53) is threadedly engaged on the screw rod (52), the support frame (53) is slidably connected to the branch box (1), two groups of pressure sensors (54) are fixedly mounted on the support frame (53), and a fourth insulating block (55) is fixedly connected to a test end of the pressure sensor (54); The driving assembly (6) drives the first rack (47) to move, controls the second busbar (44) to overlap the busbar at the outlet end of the porcelain bushing (2) and the first busbar (3), so that the busbar at the outlet end of the porcelain bushing (2) and the first busbar (3) are electrically connected, and at the same time, the first rack (47) controls the fourth insulating block (55) to press against the second busbar (44) by transmitting with the pressing assembly (5).

2. The wall-mounted low-voltage column-mounted junction box according to claim 1 is characterized in that: The overlapping surfaces of the busbar at the outlet end of the porcelain bushing (2) and the first busbar (3) are in the same plane, the length of the second busbar (44) is greater than the distance between the busbar at the outlet end of the porcelain bushing (2) and the first busbar (3), and the second busbar (44) is arranged in parallel with the first busbar (3).

3. The wall-mounted low-voltage column-mounted junction box according to claim 1 is characterized in that: The branch box (1) comprises a box body (11), a porcelain bushing (2) is fixedly mounted on the top of the box body (11), a first busbar (3) is fixedly mounted inside the box body (11) via an insulating rod, a first insulating block (12) and a second insulating block (13) are fixedly mounted inside the box body (11), the outlet busbar of the porcelain bushing (2) is plugged into the upper limit position of the first insulating block (12), and the end of the first busbar (3) is plugged into the upper limit position of the second insulating block (13); The fixing frame (41) is slidably connected to the first insulating block (12), the first rack (47) is slidably connected to the box body (11), the screw rod (52) is rotationally connected to the box body (11), and the supporting frame (53) is slidably connected to the first insulating block (12).

4. The wall-mounted low-voltage column-mounted junction box according to claim 3 is characterized in that: A plurality of support rods (42) are fixedly mounted on the fixing frame (41); the third insulating blocks (43) are slidably connected to the corresponding support rods (42); a first elastic member (45) is sleeved on the support rods (42); one end of the first elastic member (45) is fixedly connected to the third insulating block (43), and the other end is fixedly connected to the fixing frame (41).

5. The wall-mounted low-voltage column-mounted junction box according to claim 4 is characterized in that: The third insulating block (43) is provided with a plurality of positioning grooves (46); a support block (15) is slidably connected in the box body (11); a guide rod (56) is fixedly mounted on the support frame (53); the guide rod (56) is slidably connected to the support block (15); a second elastic member (57) is sleeved on the guide rod (56); one end of the second elastic member (57) is fixedly connected to the guide rod (56), and the other end is fixedly connected to the support block (15); A plurality of limit assemblies (8) are mounted on the support block (15), and the limit assemblies (8) are inserted into corresponding positioning grooves (46) for positioning the third insulating block (43).

6. The wall-mounted low-voltage column-mounted junction box according to claim 5 is characterized in that: The plurality of positioning grooves (46) are not on the same horizontal plane.

7. The wall-mounted low-voltage column-mounted junction box according to claim 3 is characterized in that: The driving assembly (6) comprises a motor (61), a second gear (62) and a third gear (63); the motor (61) is fixedly mounted in a housing (11); the second gear (62) is rotationally connected to the housing (11); the third gear (63) is rotationally connected to the housing (11); the second gear (62) and the third gear (63) are meshed for transmission; the third gear (63) is meshed for transmission with a first rack (47); an output shaft of the motor (61) is fixedly connected to a transmission shaft (64); a first limiting column (65) is slidably connected to the transmission shaft (64); the first limiting column (65) is inserted into the second gear (62) for driving the second gear (62) to rotate; a third elastic member (66) is sleeved in the first limiting column (65); one end of the third elastic member (66) is fixedly connected to the transmission shaft (64); and the other end is fixedly connected to the first limiting column (65).

8. The wall-mounted low-voltage column-mounted junction box according to claim 7 is characterized in that: The control assembly (7) further comprises a fixing block (71), a first guide frame (72) and a second guide frame (73), the fixing block (71) and the first guide frame (72) are both fixedly mounted on the second insulating block (13), the second guide frame (73) is fixedly mounted on the fixing block (71), a connecting pipe (74) is slidably connected to the second guide frame (73), a push rod (75) is rotatably connected to the connecting pipe (74), an end of the push rod (75) passes through the fixing block (71) and is fixedly connected to a second limiting column (76); The top rod (75) is sleeved with a fourth elastic member (77), one end of the fourth elastic member (77) is fixedly connected to the fixed block (71), and the other end is fixedly connected to the connecting pipe (74); a second rack (78) is slidably connected to the first guide frame (72); a fourth gear (79) is rotatably connected to the first guide frame (72); a top plate (710) is fixedly connected to the second rack (78); the top plate (710) is located between the second insulating block (13) and the support block (15) and is used to limit the support block (15) and control the movement of the support block (15); a third rack (711) is slidably connected to the second guide frame (73); the second rack (78) and the third rack (711) are both meshed with the fourth gear (79) for transmission, and the movement directions of the second rack (78) and the third rack (711) are opposite; the second rack (78) and the first guide frame (72) are fixed by a limit pin.

9. The wall-mounted low-voltage column-mounted junction box according to claim 8 is characterized in that: The second limiting column (76) and the first limiting column (65) are both prisms and their axes are collinear.

10. The wall-mounted low-voltage column-mounted junction box according to claim 5 is characterized in that: The limit assembly (8) comprises an electromagnet (81) and a plurality of support columns (82), the electromagnet (81) and the plurality of support columns (82) being fixedly mounted on a support block (15), a positioning column (83) being slidably connected to the support column (82), the positioning column (83) being inserted into a corresponding positioning groove (46) to position the third insulating block (43), a fifth elastic member (84) being arranged in the positioning column (83), one end of the fifth elastic member (84) being fixedly connected to the support column (82), and the other end being fixedly connected to the positioning column (83), and an armature (85) being fixedly mounted on the positioning column (83).

Images