A cable branch box for improving wiring efficiency

Abstract

The application discloses a cable branch box capable of improving wiring efficiency and relates to the technical field of cable branch boxes.The cable branch box comprises a main body, a back door hinged to the main body, a switch device and a cable joint connected in the main body, and a busbar connected to the switch device; a connecting portion comprising a supporting plate connected to the cable joint, an insulating tube connected to the supporting plate, and an electric contact connected to the insulating tube; a fixing portion comprising a limiting block connected to a pull rod; and a safety portion comprising a lifting rail connected to a sleeve ring and a push rod, a push block connected in the main body, a rear end of the push block connected to a touch pressure rod, and the push block in contact connection with the push rod.The cable branch box can realize the connection of three-phase electricity through one action of the branch box, can automatically fix the cable when the connection is completed, can guarantee the stability and reliability of the connection, and can automatically complete the power-off operation when the device is opened for wiring, so that the safety hidden danger caused by the omission of power-off is avoided.

Description

Technical Field

[0001] This invention relates to the field of cable branch boxes, specifically a cable branch box for improving wiring efficiency. Background Technology

[0002] Cable distribution boxes are core equipment in urban power distribution networks for cable line branching, switching, and protection. They are widely used in residential communities, commercial complexes, industrial parks, and street lighting. With the acceleration of urbanization and the rapid growth of electricity demand, the renovation, expansion, and new user access of power distribution networks are becoming increasingly frequent, leading to a sharp increase in the amount of wiring operations required for cable distribution boxes. Traditional cable distribution boxes still have some shortcomings in terms of branch connection methods and safety protection.

[0003] Firstly, the internal wiring of existing cable branch boxes mainly relies on bolt crimping or plug-in connectors. For branching operations of multi-core cables, operators need to align the cores of the branch cable with the cores of the main cable, and then tighten the bolts or insert the connectors one by one. This operation method is too cumbersome, not only time-consuming, but also less efficient in emergency repairs or nighttime operations.

[0004] Secondly, cable branch boxes are often connected to live lines, and some terminals inside the branch box carry dangerous voltages. If the upstream switch is accidentally closed by other personnel during operation, or if the power is forgotten to be turned off due to operational errors, the branch box will suddenly become energized, posing a fatal threat to the workers who are wiring. Existing branch boxes do not have any mechanism to automatically cut off the power or provide local isolation when wiring is triggered. Safety depends entirely on the operating procedures and external power outage measures. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a cable branch box that improves wiring efficiency. It can complete the connection of three-phase power in one operation, and can also automatically fix the cable when the connection is completed, ensuring the stability and reliability of the connection. Furthermore, it can automatically disconnect the power when the device is opened for wiring, avoiding safety hazards caused by forgetting to disconnect the power due to mistakes.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A cable branch box for improving wiring efficiency includes: The main body has a back door hinged to its rear side, a switch device connected to the inner cavity of the main body, the switch device being electrically connected to a busbar, and a cable connector connected inside the main body. The connecting part includes a support plate, the lower end of which is connected to a cable connector. An insulating tube is connected to the support plate, and a contact is connected inside the insulating tube. The contact is connected to a busbar. The fixing part includes a limiting block, which is slidably connected inside the insulating tube, and a pull rod is connected to the lower end of the limiting block; The safety unit includes a lifting rail, a collar slidably connected inside the lifting rail, a push rod connected to the upper end of the lifting rail, a push block slidably connected to the inner cavity of the main body, the push block being in contact with the push rod, and a pressing rod connected to the rear end of the push block. When the back door is opened, the touch rod extends out of the main body, driving the push block and push rod to move. At this time, the push rod and the lifting rail rise, and the switch device is closed by the collar control. The support plate is brought close to the busbar, driving the insulating tube to extend into the busbar, so that the contact head makes contact with the busbar to complete the connection.

[0007] Preferably, the front of the main body is hinged with a box door, the back of the main body is hinged with a back door, and the inner cavity of the main body is fixedly connected with multiple sets of mounting brackets. A switch device is fixedly connected to the left side of the upper mounting bracket, and the lower end of the switch device is electrically connected to three sets of busbars.

[0008] Preferably, the front of the mounting bracket is fixedly connected to multiple sets of cable connectors, and all the cable connectors are located below the busbar.

[0009] Preferably, the busbar has multiple sets of grooves in the middle, and each groove has an outer ring fixedly connected to a contact ring. A support plate is provided on the rear side of the busbar, and a cable is electrically connected to the lower end of the support plate. The lower end of the cable passes through the mounting frame and is electrically connected to a cable connector.

[0010] Preferably, indicator stickers are fixedly connected to the front of the support plate and the lower front of the cable.

[0011] Preferably, three sets of insulating tubes are fixedly connected to the front of the support plate. All three sets of insulating tubes extend into the through groove of the busbar and enter the inside of the contact coil. A contact head is slidably connected to the inner cavity of the insulating tube. The outer side of the contact head is in contact with the contact coil. A first spring is fixedly connected to the inner side of the contact head. The other end of the first spring is fixedly connected to the middle of the insulating tube.

[0012] Preferably, cavities are provided on the upper and lower sides of the end of the insulating tube that extends into the contact coil. A limiting block is slidably connected in the cavity, the outer end of the limiting block penetrates the insulating tube, and the end of the limiting block that extends out of the insulating tube is engaged in the inner cavity of the contact coil.

[0013] Preferably, a second spring is fixedly connected to one end of the limiting block located inside the insulating tube, the lower end of the second spring is fixedly connected to the inner cavity of the insulating tube, a pull rope is fixedly connected to one end of the limiting block connected to the second spring, and a pull rod is fixedly connected to the other end of the pull rope. The pull rod is slidably connected to the inner cavity of the insulating tube and the support plate, the rear end of the pull rod passes through and extends out of the support plate, and a handle is fixedly connected to one end of the pull rod extending out of the support plate. The handle is in contact with the rear side of the support plate.

[0014] Preferably, a fixed rail is fixedly connected to the left side of the inner cavity of the main body, a lifting rail is slidably connected to the inner cavity of the fixed rail, a third spring is fixedly connected to the lower end of the lifting rail, the lower end of the third spring is fixedly connected to the lower end of the inner cavity of the fixed rail, and a collar is slidably connected to the inner cavity of the lifting rail, the middle part of the collar being movably sleeved on the power switch of the switching device.

[0015] Preferably, a push rod is fixedly connected to the upper end of the lifting rail, the upper end of the push rod passes through the fixed rail and is slidably connected to the middle of the upper end of the fixed rail, a sliding frame is slidably connected to the upper end of the inner cavity of the main body, a push block is fixedly connected to the front end of the sliding frame, the lower end of the push block is in contact with the upper part of the push rod, a fourth spring is fixedly connected to the upper end of the inner cavity of the main body, the fourth spring is sleeved on the outer ring of the sliding frame, and the rear end of the fourth spring is fixedly connected to the rear side of the sliding frame, a touch rod is fixedly connected to the middle of the rear side of the sliding frame, the rear end of the touch rod passes through and is slidably connected to the top of the rear side of the main body, and the end of the rear end of the touch rod that passes through the main body is in contact with the front side of the back door.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The connection part of the present invention can realize the connection of three-phase power in one action of the branch box, thereby improving the wiring efficiency. In use, the support plate is first brought close to the busbar, and the three sets of insulating tubes are pushed into the three busbars, so that the three sets of contacts are connected to the three sets of busbars respectively, realizing the connection of three sets of connectors in one action. Then, the lower end of the support plate is connected to the cable connector, thereby realizing the quick wiring of the cable branch box. The fixing part of the present invention can automatically fix the cable when the connection is completed, ensuring the stability and reliability of the connection; during the process of the insulating tube entering the busbar, the limiting block located inside the insulating tube will be squeezed by the busbar and retracted into the inner cavity of the insulating tube; when the contact head is connected to the busbar, the limiting block will quickly pop out and lock into the inner side of the busbar, so that the connection between the contact head and the busbar cannot be separated, ensuring the stability of the connection. The safety mechanism of this invention can automatically disconnect the power when the device is opened for wiring, avoiding safety hazards caused by forgetting to disconnect the power due to negligence. When in use, the front and back doors of the main body are opened for connection and maintenance work. When the back door is opened, the touch rod is released from the limit of the back door and quickly extends outward, driving the push block to move synchronously. At this time, the push rod rises rapidly because it is freed from the limit of the push block, driving the lifting rail and the collar to rise together. The collar then pulls the gate of the switch device to rise and close, realizing the power disconnection when the back door is opened, avoiding safety hazards caused by forgetting to turn off the switch device when connecting cables. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall rear view of the present invention; Figure 3 This is a schematic diagram of the main structure of the present invention; Figure 4 This is a schematic diagram showing the location of the cable connector in this invention; Figure 5 This is a schematic diagram of the connecting part in this invention; Figure 6 This is a cross-sectional schematic diagram of the connecting part in this invention; Figure 7 This is a cross-sectional schematic diagram of the fixing part in this invention; Figure 8 This is a schematic diagram of the pull rod being pulled out in this invention; Figure 9 This is a schematic diagram showing the location of the safety unit in this invention; Figure 10 This is a cross-sectional schematic diagram of the fixed rail in this invention; Figure 11 This is a schematic diagram of the structure of the insurance unit in this invention; Figure 12 This is a schematic diagram of the extension of the pressure rod in this invention.

[0018] The diagram is labeled as follows: 10. Main body; 11. Box door; 12. Back door; 13. Mounting bracket; 14. Switch device; 15. Busbar; 16. Cable connector; 20. Connecting part; 21. Contact ring; 22. Support plate; 23. Cable; 24. Indicator sticker; 25. Insulating tube; 26. Contact head; 27. First spring; 30. Fixing part; 31. Limiting block; 32. Second spring; 33. Pull rope; 34. Pull rod; 35. Handle; 40. Safety part; 41. Fixed rail; 42. Lifting rail; 43. Third spring; 44. Collar; 45. Push rod; 46. Sliding frame; 47. Push block; 48. Fourth spring; 49. Contact rod. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0020] like Figures 1 to 12 As shown, this embodiment provides a cable branch box for improving wiring efficiency, comprising: The main body 10 has a back door 12 hinged to its rear side, a switch device 14 connected to the inner cavity of the main body 10, a busbar 15 electrically connected to the switch device 14, and a cable connector 16 connected inside the main body 10. The connecting part 20 includes a support plate 22. The lower end of the support plate 22 is connected to the cable connector 16. An insulating tube 25 is connected to the support plate 22. A contact 26 is connected inside the insulating tube 25. The contact 26 is connected to the busbar 15. The fixing part 30 includes a limiting block 31, which is slidably connected inside the insulating tube 25, and a pull rod 34 is connected to the lower end of the limiting block 31. Safety unit 40 includes a lifting rail 42, a collar 44 is slidably connected inside the lifting rail 42, a push rod 45 is connected to the upper end of the lifting rail 42, a push block 47 is slidably connected to the inner cavity of the main body 10, the push block 47 is in contact with the push rod 45, and a pressing rod 49 is connected to the rear end of the push block 47. When the back door 12 is opened, the touch rod 49 extends out of the main body 10, driving the push block 47 and push rod 45 to move. At this time, the push rod 45 and the lifting rail 42 rise, and the switch device 14 is closed by the collar 44. The support plate 22 approaches the busbar 15, driving the insulating tube 25 to extend into the busbar 15, so that the contact head 26 contacts the busbar 15 to complete the connection.

[0021] It should be noted that, in order to ensure the stable use of the device, the main body 10 should be equipped with a corresponding neutral wire and ground busbar, as well as other safety structures (such as live indicators, surge arresters, fault indicators, circuit breakers, etc.) and necessary electrical control components required by the branch box that are not mentioned in this embodiment, so as to ensure the stable operation and use of the device.

[0022] In this embodiment, during use, the front and back doors 12 of the main body 10 are opened for connection and maintenance work. When the back door 12 is opened, the contact rod 49 is released from the limit of the back door 12 and quickly extends outward, driving the push block 47 to move synchronously. At this time, the push rod 45 rises rapidly because it is no longer limited by the push block 47, driving the lifting rail 42 and the collar 44 to rise together. The collar 44 then pulls the gate of the switch device 14 to rise and close, realizing power cut-off when the back door 12 is opened, avoiding safety hazards caused by forgetting to turn off the switch device 14 when connecting the cable 23. When connecting the cable, first bring the support plate 22 close to the busbar 15 and push the three sets of insulating tubes 25 into the three busbars 15, so that the three sets of contact heads 26 are connected to the three sets of busbars 15 respectively, realizing the connection of the three sets of connectors in one action. Then, connect the lower end of the support plate 22 to the cable connector 16, thereby realizing quick wiring of the cable branch box.

[0023] Please refer to it again. Figures 1 to 4 The front of the main body 10 is hinged with a box door 11, the back of the main body 10 is hinged with a back door 12, and the inner cavity of the main body 10 is fixedly connected with multiple sets of mounting brackets 13. The left side of the upper mounting bracket 13 is fixedly connected with a switch device 14, and the lower end of the switch device 14 is electrically connected with three sets of busbars 15. The front of the mounting bracket 13 is fixedly connected to multiple sets of cable connectors 16, and all cable connectors 16 are located below the busbar 15.

[0024] It should be noted that a main cable should be installed inside the main body 10 and connected to the busbar 15 through the switch device 14; The mounting bracket 13 has through slots on both the upper and lower sides so that the cable 23 can pass through the through slots and connect to the cable connector 16; Both the box door 11 and the back door 12 are connected to the main body 10 through structures such as door locks.

[0025] In this embodiment, during use, the busbars 15, cable connectors 16 and various components are stably installed in the inner cavity of the main body 10 by the mounting bracket 13. The three sets of busbars 15 correspond to the three-phase circuits respectively, which meets the branching requirements of conventional three-phase cables. The multiple sets of cable connectors 16 can correspond to multiple branching circuits, which meets the usage requirements of actual wiring scenarios.

[0026] Please refer to it again. Figures 3 to 7 The busbar 15 has multiple grooves in the middle, and the outer ring of each groove is fixedly connected with a power contact ring 21. A support plate 22 is provided on the rear side of the busbar 15. The lower end of the support plate 22 is electrically connected to a cable 23. The lower end of the cable 23 passes through the mounting frame 13 and is electrically connected to the cable connector 16. Indicator stickers 24 are fixedly connected to the front of the support plate 22 and the lower front of the cable 23; Three sets of insulating tubes 25 are fixedly connected to the front of the support plate 22. All three sets of insulating tubes 25 extend into the through groove of the busbar 15 and enter the inside of the contact ring 21. A contact head 26 is slidably connected to the inner cavity of the insulating tube 25. The outer side of the contact head 26 is in contact with the contact ring 21. A first spring 27 is fixedly connected to the inner side of the contact head 26. The other end of the first spring 27 is fixedly connected to the middle of the insulating tube 25.

[0027] It should be noted that the support plate 22 is equipped with three sets of copper wires, and the cable 23 is also wrapped with three sets of copper wires. The copper wires in the support plate 22 are connected to the copper wires in the cable 23. At the same time, the three sets of contact heads 26 are also connected to the copper wires respectively, thereby realizing the connection of the support plate 22 in one step and completing the connection of the three sets of busbars 15, improving the wiring efficiency. The indicator sticker 24 is used to indicate the position of the cable 23 and the support plate 22, making it easy to connect; The part where the electric contact 26 is connected to the first spring 27 is provided with insulating material to prevent the first spring 27 from heating up and causing safety hazards. An insulating ring (such as ceramic) is also provided at the position of the inner ring of the busbar 15 and the inlet of the contact ring 21, and the insulating ring is in contact with the limiting block 31 to fix the position of the insulating tube 25. Here, when connecting the busbar 15 and the cable connector 16, the upper and lower cable connectors 16 should be connected to the busbar 15 with a gap of one electrical contact ring 21. That is, the connection sequence on the busbar 15 should be one upper cable connector 16 and one lower cable connector 16, alternating to avoid the cables 23 from getting tangled together and affecting subsequent maintenance.

[0028] In this embodiment, the support plate 22 is attached to the busbar 15 during use, and the three sets of insulating tubes 25 are respectively aligned with the corresponding contact rings 21 on the busbar 15. Pushing the support plate 22 forward will cause the three insulating tubes 25 to be inserted into the corresponding contact rings 21 simultaneously. During the process, the contact head 26 is squeezed inward by the inner wall of the contact ring 21 and retracts, compressing the first spring 27. The elastic force of the first spring 27 will keep the contact head 26 pressed against the inner wall of the contact ring 21, ensuring a stable electrical connection between the two. The connection of three phases can be completed simultaneously with one push action, which greatly shortens the wiring operation time and improves wiring efficiency.

[0029] Please refer to it again. Figures 6 to 8 The insulating tube 25 extends into the contact coil 21 and has cavities on both the upper and lower sides of one end. A limit block 31 is slidably connected in the cavity. The outer end of the limit block 31 passes through the insulating tube 25, and the end of the limit block 31 extending out of the insulating tube 25 is engaged in the inner cavity of the contact coil 21. A second spring 32 is fixedly connected to one end of the limiting block 31 located in the inner cavity of the insulating tube 25. The lower end of the second spring 32 is fixedly connected to the inner cavity of the insulating tube 25. A pull rope 33 is fixedly connected to one end of the limiting block 31 connected to the second spring 32. A pull rod 34 is fixedly connected to the other end of the pull rope 33. The pull rod 34 is slidably connected to the inner cavities of the insulating tube 25 and the support plate 22. The rear end of the pull rod 34 passes through and extends out of the support plate 22. A handle 35 is fixedly connected to one end of the pull rod 34 extending out of the support plate 22. The handle 35 is in contact with the rear side of the support plate 22.

[0030] It should be noted that the upper end of the limiting block 31 is a trapezoidal structure block, and the inclined surface faces the direction of the contact ring 21. This is intended to allow the busbar 15 to squeeze the inclined surface of the limiting block 31 to push the limiting block 31 into the insulating tube 25 when the support plate 22 pushes the insulating tube 25 into the contact ring 21. After the limiting block 31 is fully inserted into the contact ring 21, it pops out and fixes the insulating tube 25 in the contact ring 21. The handle 35 has a groove in the middle for easy gripping; The support plate 22 and the limiting block 31, as well as the pull rope 33 and the pull rod 34 are all made of insulating material (or have insulating material wrapped around their outer edges).

[0031] In this embodiment, as the insulating tube 25 enters the junction ring 21, the edge of the junction ring 21 presses against the trapezoidal slope of the limiting block 31, pressing the limiting block 31 into the cavity of the insulating tube 25. When the limiting block 31 is fully inside the junction ring 21, it is no longer compressed, and the second spring 32 quickly ejects the limiting block 31, locking it against the inner wall of the junction ring 21, automatically fixing the position of the insulating tube 25 and the junction ring 21 without the need for additional screws or clips, simplifying the wiring operation. When disassembly and maintenance are required, simply pull the handle 35 backward. The handle 35 moves the pull rod 34 and the pull rope 33, pulling the limiting block 31 back into the cavity of the insulating tube 25, releasing the limiting block 31 from restricting the position of the insulating tube 25. Then, pulling the support plate 22 backward will simultaneously pull all three sets of insulating tubes 25 out of the junction ring 21, quickly completing the disassembly and significantly improving the efficiency of disassembly and maintenance.

[0032] Please refer to it again. Figures 9 to 12 A fixed rail 41 is fixedly connected to the left side of the inner cavity of the main body 10. A lifting rail 42 is slidably connected to the inner cavity of the fixed rail 41. A third spring 43 is fixedly connected to the lower end of the lifting rail 42. The lower end of the third spring 43 is fixedly connected to the lower end of the inner cavity of the fixed rail 41. A collar 44 is slidably connected to the inner cavity of the lifting rail 42. The middle part of the collar 44 is movably sleeved at the power switch of the switch device 14. A push rod 45 is fixedly connected to the upper end of the lifting rail 42. The upper end of the push rod 45 passes through the fixed rail 41 and is slidably connected to the middle of the upper end of the fixed rail 41. A sliding frame 46 is slidably connected to the upper end of the inner cavity of the main body 10. A push block 47 is fixedly connected to the front end of the sliding frame 46. The lower end of the push block 47 is in contact with the upper part of the push rod 45. A fourth spring 48 is fixedly connected to the upper end of the inner cavity of the main body 10. The fourth spring 48 is sleeved on the outer ring of the sliding frame 46, and the rear end of the fourth spring 48 is fixedly connected to the rear side of the sliding frame 46. A touch rod 49 is fixedly connected to the middle of the rear side of the sliding frame 46. The rear end of the touch rod 49 passes through and is slidably connected to the top of the rear side of the main body 10. The end of the rear end of the touch rod 49 that passes through the main body 10 is in contact with the front side of the back door 12.

[0033] It should be noted that guide blocks are provided on both the front and rear sides of the lifting rail 42 to limit the movement path of the lifting rail 42. Under normal conditions, the operator can drive the collar 44 to slide up and down within the lifting rail 42 to control the opening and closing of the switch device 14; Guide blocks are also provided on the front and rear sides of the collar 44, so that the collar 44 can only slide up and down and cannot rotate or shift. The upper end of the push rod 45 is provided with an inclined surface, and the lower end of the push block 47 is also provided with an inclined surface, and the two sets of inclined surfaces are fitted together. The upper end of the main body 10 is provided with two sets of limiting sleeves (such as...). Figure 12 As shown), the fourth spring 48 is installed at the rear end of the limiting sleeve rod located at the rear, thereby limiting the range of motion of the sliding frame 46 through the limiting sleeve rod; The sliding displacement of the sliding frame 46 causes the push block 47 to move by a distance that is sufficient to ensure that the lifting rail 42 can rise to twice the height of the moving space of the collar 44 (the switch device 14 is in the open state when pulled down), thereby ensuring that once the lifting rail 42 rises, it can pull the collar 44 to rise and drive the switch device 14 to close and cut off the power. The surface of the lifting rail 42 is provided with a protective plate (such as...). Figure 10 (As shown), to prevent the third spring 43 from dislodging from the inner cavity of the fixed rail 41, thus affecting the normal use of the device; The thrust of the third spring 43 should be sufficient to drive the lifting rail 42 and the collar 44 to rise and push the switch device 14 to lift and close. In this normal state, once the back door 12 is opened for cable 23 adjustment, the fourth spring 48 can push the sliding frame 46 to move, causing the push block 47 to release the limit on the push rod 45, and the third spring 43 can push the lifting rail 42 and the collar 44 to rise, causing the switch device 14 to lift and close.

[0034] In this embodiment, under normal conditions, when the back door 12 is closed, it presses the contact rod 49 inward. The contact rod 49 drives the sliding frame 46 and the push block 47 to retract inward, pressing the fourth spring 48. At the same time, the push block 47 presses the push rod 45 downward through the mutually fitting inclined surfaces, pushing the lifting rail 42 and the collar 44 to move downward. At this time, the operator can pull the collar 44 downward to keep the switch device 14 in the pulled-down energized state, meeting the normal power supply requirements of the branch box. When it is necessary to open the back door 12 for wiring maintenance, the back door 12 releases the pressure on the contact rod 49, the fourth spring 48 resets and pushes the sliding frame 46 to move outward, driving the push block 47 to move outward synchronously. The push block 47 releases the downward pressure on the push rod 45, and the third spring 43 then resets and pushes the lifting rail 42 to move upward, driving the collar 44 and the switch device 14 to rise synchronously, automatically completing the power-off operation. There is no need for the operator to manually turn off the switch in advance, which not only improves the convenience of operation, but also avoids safety accidents caused by forgetting to turn off the power, effectively improving the safety of the device.

[0035] The working principle of this invention is as follows: In the normal state of the branch box, the back door 12 is closed, and the pressure touch rod 49 is kept in place. The push block 47 will press the push rod 45 downward through the mutually fitting inclined surfaces, pushing the lifting rail 42 and the collar 44 to move downward. At this time, the operator can pull the collar 44 downward to keep the switch device 14 in the pulled-down energized state. When it is necessary to open the back door 12 for wiring maintenance, the back door 12 releases the pressure on the pressure touch rod 49, the fourth spring 48 resets and pushes the sliding frame 46 to move outward, driving the push block 47 to move outward synchronously. The push block 47 releases the downward pressure on the push rod 45, and the third spring 43 then resets and pushes the lifting rail 42 to move upward, driving the collar 44 and the switch device 14 to rise synchronously, automatically completing the power-off operation and ensuring safety. Then, the support plate 22 is attached to the busbar 15, and the three sets of insulating tubes 25 are aligned with the corresponding contact rings 21 on the busbar 15. Pushing the support plate 22 will cause the three insulating tubes 25 to be inserted into the corresponding contact rings 21 simultaneously. At the same time, the first spring 27 will continuously press the contact head 26 against the inner wall of the contact ring 21 to ensure a stable electrical connection between the two. As the insulating tubes 25 enter the contact rings 21, the edge of the contact ring 21 will press the trapezoidal slope of the limiting block 31, pressing the limiting block 31 into the cavity of the insulating tube 25. When the limiting block 31 is completely inside the contact ring 21, the limiting block 31 is no longer compressed, and the second spring 32 will quickly pop out the limiting block 31 and lock it against the inner wall side edge of the contact ring 21, automatically completing the position fixation of the insulating tubes 25 and the contact rings 21. When disassembly and maintenance are required, simply pull the handle 35 backward to move the pull rod 34 and the pull rope 33, which will pull the limit block 31 back into the cavity of the insulating tube 25. Then, pull the support plate 22 backward to pull the three sets of insulating tubes 25 out of the contact coil 21 at the same time, quickly completing the disassembly and greatly improving the efficiency of disassembly and maintenance.

[0036] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A cable branch box for improving wiring efficiency, characterized in that: include: The main body (10) has a back door (12) hinged to its rear side, a switch device (14) is connected to the inner cavity of the main body (10), the switch device (14) is electrically connected to a busbar (15), and a cable connector (16) is connected inside the main body (10). The connecting part (20) includes a support plate (22), the lower end of which is connected to a cable connector (16), an insulating tube (25) is connected to the support plate (22), and a contact (26) is connected inside the insulating tube (25). The contact (26) is connected to the busbar (15). The fixing part (30) includes a limiting block (31), which is slidably connected inside the insulating tube (25), and the lower end of the limiting block (31) is connected to a pull rod (34). The safety unit (40) includes a lifting rail (42), a collar (44) is slidably connected inside the lifting rail (42), a push rod (45) is connected to the upper end of the lifting rail (42), a push block (47) is slidably connected to the inner cavity of the main body (10), the push block (47) is in contact with the push rod (45), and a touch rod (49) is connected to the rear end of the push block (47). When the back door (12) is opened, the touch rod (49) extends out of the main body (10), driving the push block (47) and push rod (45) to move. At this time, the push rod (45) and the lifting rail (42) rise, and the switch device (14) is closed by the collar (44). The support plate (22) approaches the busbar (15), driving the insulating tube (25) to extend into the busbar (15), so that the contact head (26) contacts the busbar (15) to complete the connection.

2. The cable branch box for improving wiring efficiency according to claim 1, characterized in that: The front of the main body (10) is hinged with a box door (11), the back of the main body (10) is hinged with a back door (12), and the inner cavity of the main body (10) is fixedly connected with multiple sets of mounting brackets (13). The left side of the mounting bracket (13) located above is fixedly connected with a switch device (14), and the lower end of the switch device (14) is electrically connected with three sets of busbars (15).

3. The cable branch box for improving wiring efficiency according to claim 2, characterized in that: The mounting bracket (13) has multiple sets of cable connectors (16) fixedly connected to its front side, and the cable connectors (16) are all located below the busbar (15).

4. The cable branch box for improving wiring efficiency according to claim 3, characterized in that: The busbar (15) has multiple grooves in the middle, and the outer ring of each groove is fixedly connected with a power contact ring (21). A support plate (22) is provided on the rear side of the busbar (15). The lower end of the support plate (22) is electrically connected to a cable (23). The lower end of the cable (23) passes through the mounting bracket (13) and is electrically connected to the cable connector (16).

5. The cable branch box for improving wiring efficiency according to claim 4, characterized in that: Indicator stickers (24) are fixedly connected to the front of the support plate (22) and the lower front of the cable (23).

6. The cable branch box for improving wiring efficiency according to claim 4, characterized in that: Three sets of insulating tubes (25) are fixedly connected to the front of the support plate (22). All three sets of insulating tubes (25) extend into the through groove of the busbar (15) and enter the inside of the contact ring (21). The inner cavity of the insulating tube (25) is slidably connected to the contact head (26). The outer side of the contact head (26) is in contact with the contact ring (21). The inner side of the contact head (26) is fixedly connected to the first spring (27). The other end of the first spring (27) is fixedly connected to the middle of the insulating tube (25).

7. The cable branch box for improving wiring efficiency according to claim 6, characterized in that: The insulating tube (25) extends into the electrical contact coil (21) and has cavities on its upper and lower sides. A limiting block (31) is slidably connected inside the cavity. The outer end of the limiting block (31) passes through the insulating tube (25), and the end of the limiting block (31) extending out of the insulating tube (25) is engaged in the inner cavity of the electrical contact coil (21).

8. The cable branch box for improving wiring efficiency according to claim 7, characterized in that: The limiting block (31) is fixedly connected to a second spring (32) at one end of the inner cavity of the insulating tube (25). The lower end of the second spring (32) is fixedly connected to the inner cavity of the insulating tube (25). The limiting block (31) is fixedly connected to a pull rope (33) at one end of the second spring (32). The other end of the pull rope (33) is fixedly connected to a pull rod (34). The pull rod (34) is slidably connected to the inner cavity of the insulating tube (25) and the support plate (22). The rear end of the pull rod (34) passes through and extends out of the support plate (22). The end of the pull rod (34) extending out of the support plate (22) is fixedly connected to a handle (35). The handle (35) is in contact with the rear side of the support plate (22).

9. The cable branch box for improving wiring efficiency according to claim 2, characterized in that: A fixed rail (41) is fixedly connected to the left side of the inner cavity of the main body (10). A lifting rail (42) is slidably connected to the inner cavity of the fixed rail (41). A third spring (43) is fixedly connected to the lower end of the lifting rail (42). The lower end of the third spring (43) is fixedly connected to the lower end of the inner cavity of the fixed rail (41). A collar (44) is slidably connected to the inner cavity of the lifting rail (42). The middle part of the collar (44) is movably sleeved at the power switch of the switch device (14).

10. The cable branch box for improving wiring efficiency according to claim 8, characterized in that: The upper end of the lifting rail (42) is fixedly connected to a push rod (45). The upper end of the push rod (45) passes through the fixed rail (41) and is slidably connected to the middle of the upper end of the fixed rail (41). The upper end of the inner cavity of the main body (10) is slidably connected to a sliding frame (46). The front end of the sliding frame (46) is fixedly connected to a push block (47). The lower end of the push block (47) is in contact with the upper part of the push rod (45). The upper end of the inner cavity of the main body (10) is fixedly connected to a fourth spring (48). The fourth spring (48) is sleeved on the outer ring of the sliding frame (46), and the rear end of the fourth spring (48) is fixedly connected to the rear side of the sliding frame (46). The middle of the rear side of the sliding frame (46) is fixedly connected to a touch rod (49). The rear end of the touch rod (49) passes through and is slidably connected to the top of the rear side of the main body (10). The end of the touch rod (49) that passes through the main body (10) is in contact with the front side of the back door (12).

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