Internal distribution structure of branch box

Abstract

The utility model relates to an internal distribution structure of a branch box, which comprises an isolating switch, a bus system and a circuit breaker which are sequentially connected along the vertical direction, the bus system comprises a plurality of phase bus bars, and each phase bus bar comprises a bus bar and a plurality of branch buses which are integrally formed. The branch buses comprise first branch buses and second branch buses which are arranged on the two sides of the bus bar, the first branch buses are connected with the isolating switches, the second branch buses are connected with the circuit breakers, first phase partition plates are connected between the isolating switches and the bus bar system, and the first phase partition plates are arranged between the two adjacent first branch buses; a second phase partition plate is connected between the circuit breaker and the bus system, and the second phase partition plate is arranged between two adjacent second branch buses. By adopting the above technical scheme, the utility model provides the internal distribution structure of the branch box, the compact arrangement of parts and the small transverse occupied width are realized, and in the vertical stacking layout, the operation of switching on and switching off, maintenance confirmation and the like can be completed by an operator without large-amplitude movement.

Description

TECHNICAL FIELD

[0001] The utility model relates to branch box technical field especially is related to an internal distribution structure of branch box. BACKGROUND

[0002] The utility model discloses a kind of insulated closed low-voltage cable branch boxes with the announcement number CN211151324U of authorization, including box, integrated closed bus system, molded case circuit breaker and load isolation switch are equipped in box, the incoming line end of integrated closed bus system is connected with the outgoing line end of load isolation switch, the outgoing line end of integrated closed bus system is connected with the incoming line end of molded case circuit breaker, integrated closed bus system includes busbar, slot and the cover that is fixed in box, slot and busbar insertion fit cooperation, busbar is installed in cover, busbar is equipped with the joint of protruding slot.

[0003] From the description attached to the above patent Figure 1 It can be seen that load isolation switch is arranged at the left side of bus system and circuit breaker, and bus system is arranged above circuit breaker. Such structural layout has the following problems:

[0004] 1. Low space utilization of box, poor installation adaptability, requires occupying horizontal width (accommodating left side isolation switch) and vertical height (accommodating bus system above), which will force the increase of horizontal size of box; if the width of box is compressed due to installation space limitation, the operation gap of isolation switch and circuit breaker will be further squeezed, resulting in crowded component layout.

[0005] 2. Poor operation and maintenance convenience, redundant operation route, the layout of left side isolation switch requires operators to move repeatedly between left side and middle part of cabinet, which increases operation steps and time cost.

[0006] 3. High risk of fault spreading, high difficulty of arc isolation design, horizontal fault is difficult to block, if arc short circuit fault occurs in isolation switch, high-temperature arc will spread horizontally to right side circuit breaker, and the design difficulty of horizontal arc isolation barrier of box is much higher than that of vertical layered arc isolation, which is easy to cause the fault to affect the whole branch box.

[0007] 4. High wiring complexity, increased fault points, incoming and outgoing line cables of cable branch box are usually connected from lower part of cabinet, in "left isolation switch" layout, cable needs to be wired horizontally to left side isolation switch first, then connected to bus system after turning back, and finally connected to circuit breaker downward, which not only increases the wiring length and bending times of cable, but also needs to add cable fixing bracket and turning joint, which greatly increases the fault point probability of cable joint, and reduces the current-carrying stability of cable. UTILITY MODEL CONTENTS

[0008] The utility model discloses a branch box's internal distribution structure, realize compact arrangement, and the width of horizontal occupation is little, save space, and in vertical stack layout, the operating mechanism of isolating switch, circuit breaker is in same vertical area, and operating personnel can complete the operation such as opening and closing, maintenance confirmation without moving greatly, and cable can be connected isolating switch, circuit breaker, busbar in turn vertically upwards, and wiring path is short and straight, and need not additional bending.

[0009] The utility model discloses a branch box's internal distribution structure, including the isolating switch, busbar system and circuit breaker who connects in proper order along the vertical direction of branch box, the busbar system includes several phase busbar, and each phase busbar includes the converging busbar of integrated moulding and several branch busbar, and branch busbar includes the first branch busbar and the second branch busbar of being arranged at the both sides of converging busbar, the first branch busbar is connected with isolating switch, and the second branch busbar is connected with circuit breaker, and the isolating switch is connected with the first interphase partition plate between busbar system, and the first interphase partition plate is arranged between two first branch busbars, and the second interphase partition plate is connected between circuit breaker and busbar system, and the second interphase partition plate is arranged between two second branch busbars.

[0010] The utility model discloses a branch box's internal distribution structure, including the isolating switch, busbar system and circuit breaker who connects in proper order along the vertical direction of branch box, the busbar system includes several phase busbar, and each phase busbar includes the converging busbar of integrated moulding and several branch busbar, and branch busbar includes the first branch busbar and the second branch busbar of being arranged at the both sides of converging busbar, the first branch busbar is connected with isolating switch, and the second branch busbar is connected with circuit breaker, and the isolating switch is connected with the first interphase partition plate between busbar system, and the first interphase partition plate is arranged between two first branch busbars, and the second interphase partition plate is connected between circuit breaker and busbar system, and the second interphase partition plate is arranged between two second branch busbars.

[0011] The utility model discloses a branch box's internal distribution structure, including the isolating switch, busbar system and circuit breaker who connects in proper order along the vertical direction of branch box, the busbar system includes several phase busbar, and each phase busbar includes the converging busbar of integrated moulding and several branch busbar, and branch busbar includes the first branch busbar and the second branch busbar of being arranged at the both sides of converging busbar, the first branch busbar is connected with isolating switch, and the second branch busbar is connected with circuit breaker, and the isolating switch is connected with the first interphase partition plate between busbar system, and the first interphase partition plate is arranged between two first branch busbars, and the second interphase partition plate is connected between circuit breaker and busbar system, and the second interphase partition plate is arranged between two second branch busbars.

[0012] With the further arrangement, the shell arranged outside each phase busbar row can form all-around insulation protection for the busbar, so as to isolate the invasion of dust, moisture and foreign matters from the outside, avoid insulation aging or short-circuit failure of the busbar row due to environmental factors, and make the connection path of the busbar straight, thereby reducing the bending loss of the cable.

[0013] The further arrangement of the utility model is that: each shell comprises a plurality of shell bodies arranged in sections, the shell bodies are sequentially sleeved outside the busbar along the length direction of the busbar row, and the shell bodies adjacent to each other are directly connected or indirectly connected, and the end portions of the shell bodies at the first end and the second end are sleeved with edge covers to form a closed structure.

[0014] With the further arrangement, the shell is connected by a plurality of shell bodies arranged in sections along the length direction of the busbar, so as to adapt to busbars of different length specifications and improve the versatility of the product.

[0015] The further arrangement of the utility model is that: the fracture structure is integrally formed between the first connecting slots adjacent to each other, and a gap is arranged between the fracture structure and the upper and lower end faces of the shell, so as to form an opening for the branch busbar to extend out of the shell by breaking the fracture structure and the shell.

[0016] With the further arrangement, the fracture structure integrally formed between the first connecting slots adjacent to each other can determine the position of the opening without additional processing, and the position where the branch busbar does not extend out does not need to be fractured, so as to avoid the exposure of the busbar.

[0017] The further setting of the utility model discloses: each fracture structure includes integrally formed first piece and second piece, the left and right ends of first piece are integrally formed with the shell, the left and right ends of second piece are arranged apart from the shell, first piece is equipped with the gap with the end face of shell, the front end face of first piece and the front end face of second piece are arranged in staggered mode, so as to be arranged in stepped mode.

[0018] The further setting is adopted, the fracture structure is integrally formed with the shell, the second piece is arranged apart from the shell, the stress concentration of fracture is in the preset area, the fracture process is stable and controllable, and irregular fragments are not generated, the stepped staggered structure of the front end face of first piece and second piece increases the creepage distance, the insulation effect is good, and dustproof can also be realized.

[0019] The further setting of the utility model discloses: the circuit breaker is equipped with multiple, each circuit breaker is arranged along the length direction of bus system, the lower end face of shell is also equipped with fourth connecting groove, fourth connecting groove is equipped with third phase spacing plate, and the lower end of third phase spacing plate extends to between adjacent two circuit breakers.

[0020] The further setting is adopted, the structure that multiple circuit breakers are arranged along the length direction of bus system can satisfy the demand of multiple loop outgoing line, greatly improves the expansion capacity and power supply flexibility of branch box, adapts the power distribution requirement of different scenes, the fourth connecting groove of lower end face of shell and the plug-in cooperation of third phase spacing plate make third phase spacing plate accurately extend to between adjacent circuit breakers, realize the phase-to-phase physical isolation of circuit breaker, can effectively block the horizontal spread of circuit breaker fault arc, prevent the expansion of fault range, and simultaneously, third phase spacing plate strengthens the insulation protection of bus system and circuit breaker connecting part, and improves the short-circuit resistance of overall equipment.

[0021] The further setting of the utility model discloses: each shell includes splitly arranged front shell and rear shell, the upper end part of front shell and rear shell is equipped with screw hole, and is connected through screw, the shell and edge cover are also connected through screw, the lower end part of front shell is equipped with positioning hole, the lower end part of rear shell is equipped with positioning column, and the plug-in cooperation of positioning column and positioning hole is realized.

[0022] The further setting is adopted, the shell adopts split type structure of front shell and rear shell, and the upper end is tightly connected through screw, which is convenient to disassemble and assemble, and is convenient for busbar maintenance, the lower end is connected through the plug-in cooperation of positioning column and positioning hole, realizes the accurate positioning of front shell and rear shell, guarantees the assembly coaxial degree, avoids the busbar clamping deviation caused by shell misplacement, the cooperation structure of positioning column and positioning hole can effectively disperse the external force borne by the shell, improves the overall structural stability, prevents the shell loosening caused by vibration in the operation process, and the screw connection mode of shell and edge cover is firm and reliable in connection, and assembly convenience and protection performance are considered.

[0023] The further setting of the utility model discloses: the indirect connection of adjacent two shells can be realized through the connecting piece, the left and right end parts of the shell are equipped with the plug-in block, the connecting piece is equipped with the insertion slot correspondingly, and the plug-in block is inserted into the insertion slot.

[0024] The further setting is adopted, and the adjacent shells are indirectly connected through the connecting piece of the plug-in block and the insertion slot, so that the quick splicing of the shell is realized, and the assembly efficiency is high.

[0025] The further setting of the utility model discloses: the inner wall of the front shell is equipped with a plurality of first convex strips, the inner wall of the rear shell is equipped with a plurality of second convex strips, the first convex strip is arranged correspondingly with the second convex strip, and the clamping groove is formed between the two convex strips, and the busbar is located in the clamping groove.

[0026] The further setting is adopted, and the busbar is installed in the shell, and the gap is formed between the busbar and the inner wall of the shell, so that heat dissipation is facilitated, heat accumulation is avoided, positioning of the busbar row is facilitated through the first convex strip and the second convex strip, the third convex strip is in contact with the lower end surface of the busbar, the weight of the busbar is effectively supported, the deformation of the busbar due to gravity is avoided, the contact of the busbar joint is avoided, and the service life of the busbar system is prolonged.

[0027] The further setting of the utility model discloses: the third connecting groove and the fourth connecting groove are arranged in a trapezoidal shape, the lower end of the second phase spacing plate is tightly matched with the third connecting groove, the upper end of the third phase spacing plate is tightly matched with the fourth connecting groove, and the upper end of the first phase spacing plate is tightly matched with the second connecting groove.

[0028] The further setting is adopted, and the trapezoidal structure of the third connecting groove and the fourth connecting groove has a guiding effect on the plugging and unplugging of the phase spacing plate, and assembly operation is simplified. ACCURATE DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure schematic diagram of the embodiment of the utility model;

[0030] Figure 2 It is the schematic diagram of the busbar system of the embodiment of the utility model;

[0031] Figure 3It is the schematic view of the lower end surface of the busbar system according to the embodiment of the utility model;

[0032] Figure 4 It is the schematic view of the busbar and the shell according to the embodiment of the utility model;

[0033] Figure 5 It is the schematic view of the single shell according to the embodiment of the utility model;

[0034] Figure 6 It is the schematic view of the front shell according to the embodiment of the utility model;

[0035] Figure 7 It is Figure 6 It is the enlarged view of the A part in the middle;

[0036] Figure 8 It is the schematic view of the rear shell according to the embodiment of the utility model;

[0037] Figure 9 It is the schematic view of the connecting piece according to the embodiment of the utility model;

[0038] Figure 10 It is the schematic view of the edge cover according to the embodiment of the utility model;

[0039] Figure 11 It is the schematic view of the disconnector according to the embodiment of the utility model;

[0040] Figure 12 It is the schematic view of the first phase interval plate according to the embodiment of the utility model;

[0041] Figure 13 It is the schematic view of the circuit breaker and the second phase interval plate according to the embodiment of the utility model;

[0042] Figure 14 It is the schematic view of the busbar according to the embodiment of the utility model.

[0043] In the drawing, 1, disconnector; 11, second connecting groove; 2, busbar system; 21, busbar; 211, busbar; 212, first branch busbar; 213, second branch busbar; 22, shell; 221, first connecting groove; 222, fourth connecting groove; 223, front shell; 224, rear shell; 225, threaded hole; 226, positioning hole; 227, positioning column; 228, first convex strip; 229, second convex strip; 230, third convex strip; 231, plug block; 3, circuit breaker; 31, third connecting groove; 4, first phase interval plate; 5, second phase interval plate; 6, third phase interval plate; 7, edge cover; 8, fracture structure; 81, first piece; 82, second piece; 83, opening; 9, connecting piece; 91, plug groove; 10, gap. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0045] It should be noted that, in the description of the present application, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. In the description of the present application, the meaning of "several" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0047] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of those skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0048] For example, the first and second embodiments can be combined with each other, but the third embodiment cannot be combined with the first and second embodiments. Figures 1-14The internal distribution structure of a branch box is shown, which comprises an isolating switch 1, a busbar system 2 and a circuit breaker 3 connected in sequence along the vertical direction, the busbar system 2 comprises a plurality of phase busbar arrays 21, each phase busbar array 21 comprises an integrally formed busbar 211 and a plurality of branch busbars, the branch busbars comprise first branch busbars 212 and second branch busbars 213 arranged on both sides of the busbar 211, the first branch busbars 212 are connected with the isolating switch 1, and the second branch busbars 213 are connected with the circuit breaker 3, a first inter-phase partition plate 4 is connected between the isolating switch 1 and the busbar array 21 system, the first inter-phase partition plate 4 is arranged between adjacent first branch busbars 212, a second inter-phase partition plate 5 is connected between the circuit breaker 3 and the busbar system 2, and the second inter-phase partition plate 5 is arranged between adjacent second branch busbars 213, the vertical stacking layout of the isolating switch 1, the busbar system 2 and the circuit breaker 3 connected in sequence can fully utilize the vertical space of the branch box, greatly compress the transverse size of the cabinet, and adapt to narrow installation scenes such as power distribution rooms and cable trenches; at the same time, heat is orderly diffused from bottom to top along the vertical direction, the heat dissipation areas of various heat generating components do not interfere with each other, local heat accumulation is effectively avoided, the structure of the integrally formed busbar 211 and the upper second branch busbar 213 reduces the number of busbar joints, reduces the risk of heating and short circuit failure caused by poor joint contact, improves the current carrying stability and operation reliability of the busbar system 2, the first inter-phase partition plate 4 is arranged between adjacent first branch busbars, and the second inter-phase partition plate 5 is arranged between adjacent second branch busbars 213, which can realize physical isolation and insulation protection of adjacent phase busbars, increase the creepage distance, block the inter-phase arc short circuit channel, avoid fault cross-phase spread, significantly improve the operation safety level of the branch box, and the partition plate can be made of high insulation and flame-retardant composite material.

[0049] The phase bus bar 21 is provided with an outer shell 22, the outer shell is injection molded by insulating material, the bus bar 211 is located in the corresponding outer shell 22, the first branch bus bar and the second branch bus bar 213 are respectively led out from the upper and lower end faces of the outer shell 22, the upper and lower end faces of each outer shell 22 are provided with a first connecting groove 221, the second connecting groove 11 is arranged on the disconnecting switch 1, the third connecting groove 31 is arranged on the circuit breaker 3, the upper and lower ends of the first phase spacer plate 4 are respectively inserted into the second connecting groove 11 and the first connecting groove 221, the upper and lower ends of the second phase spacer plate 5 are respectively inserted into the first connecting groove 221 and the third connecting groove 31, the outer shell 22 is further provided with a heat dissipation hole, gaps are arranged between the outer shells 22, the outer shell 22 arranged outside the phase bus bar 21 can form all-around insulation protection for the bus bar 211, and the invasion of dust, moisture and foreign matters from the outside is isolated, so that insulation aging or short circuit failure of the bus bar 21 due to environmental factors is avoided, the structure that the first branch bus bar and the second branch bus bar 213 are respectively led out from the upper and lower end faces of the outer shell 22 makes the bus bar connection path straight, and the cable bending loss is reduced, the first connecting groove 221, the second connecting groove 11, the third connecting groove 31 and the insertion and cooperation of the phase spacer plate realize accurate positioning and stable installation of the phase spacer plate, without the need of additional fasteners, and the assembly process is simplified; meanwhile, the sealing performance of the insertion structure is excellent, the arc breakthrough gap can be prevented, the insulation arc isolation effect is strengthened, the gaps reserved between the outer shells 22 form independent heat dissipation channels, the heat generated during operation of the bus bar 211 can be quickly dissipated, and the problem of excessive temperature rise caused by superposition of phase heat is avoided.

[0050] Each outer shell 22 comprises a plurality of shell bodies arranged in sections, each shell body is sequentially sleeved outside the bus bar 211 along the length direction of the bus bar 21, and the adjacent two shell bodies are directly connected or indirectly connected, and the end portions of the first and last shell bodies are sleeved with edge covers 7 to form a closed structure, the outer shell 22 adopts the structure that a plurality of shell bodies arranged in sections are spliced along the length direction of the bus bar, which can adapt to bus bars 211 of different length specifications and improve the universality of the product; the sectional design makes the bus bar 21 more convenient to wear and maintain, without the need of overall disassembly of the outer shell 22, thereby reducing the difficulty of maintenance operation, the closed structure of the edge covers 7 at the end portions of the first and last shell bodies can further optimize the sealing performance of the outer shell 22, prevent foreign matters from entering the shell body to contact the bus bar 211, and avoid the risk of electric shock caused by exposure of the bus bar end portion, thereby ensuring the safety of operation and maintenance personnel.

[0051] The integral forming of the fracture structure 8 between the two adjacent first connecting grooves 221 is provided with a gap 10 between the upper and lower end faces of the shell 22, so that the fracture structure 8 and the shell 22 are fractured to form an opening 83 for the branch bus to extend out of the shell 22. The integral forming of the fracture structure 8 between the adjacent first connecting grooves 221 eliminates the need for additional processing of the branch bus to extend out of the opening, simplifies the production process of the shell 22, reduces the manufacturing cost, and can determine the opening position according to the position of the branch bus. There is no need to fracture the place where the branch bus does not extend out, avoiding the exposure of the busbar 211; the preset of the fracture structure 8 makes the opening forming process controllable, with high dimensional accuracy and good adaptability to the branch bus. The gap reserved between the fracture structure 8 and the end face of the shell 22 can effectively avoid stress transmission to the shell 22 body during the fracture operation, prevent the shell 22 from cracking and damage, and facilitate operation; at the same time, the gap provides a buffer space for the edge of the fractured opening, avoiding the edge burr scratching the insulating layer of the branch bus, and ensuring the stable electrical performance of the busbar; each fracture structure 8 includes an integral first piece 81 and a second piece 82. The left and right ends of the first piece 81 are integrally formed with the shell 22, and the left and right ends of the second piece 82 are spaced apart from the shell 22. The first piece 81 is provided with a gap with the end face of the shell 22, and the front end face of the first piece 81 and the front end face of the second piece 82 are arranged in a staggered manner to form a stepped structure. The integral forming of the first piece 81 with the shell 22 and the spaced arrangement of the second piece 82 with the shell 22 concentrate the fracture stress on the preset area, making the fracture process stable and controllable, and avoiding irregular fragments. The stepped staggered structure of the front end faces of the first piece 81 and the second piece 82 increases the creepage distance, has good insulation effect, and can also prevent dust.

[0052] The circuit breaker 3 is provided with a plurality of circuit breakers 3 arranged along the length direction of the busbar system 2, and the lower end surface of the shell 22 is further provided with a fourth connecting groove 222, the fourth connecting groove 222 is provided with a third phase spacing plate 6, the lower end of the third phase spacing plate 6 extends between the adjacent two circuit breakers 3, the structure that a plurality of circuit breakers 3 are arranged along the length direction of the busbar system 2 can meet the demand of multi-loop outgoing line, greatly improve the expansion capacity and power supply flexibility of the branch box, adapt to the power distribution requirements of different scenes, the plug-in cooperation of the fourth connecting groove 222 of the lower end surface of the shell 22 and the third phase spacing plate 6 makes the third phase spacing plate 6 accurately extend between the adjacent circuit breakers 3, realizes the phase-to-phase physical isolation of the circuit breaker 3, can effectively block the horizontal spread of the fault arc of the circuit breaker 3, and prevent the expansion of the fault range; at the same time, the third phase spacing plate 6 strengthens the insulation protection of the connection part of the busbar system 2 and the circuit breaker 3, and improves the short-circuit resistance of the whole equipment; the third connecting groove 31 and the fourth connecting groove 222 are arranged in a trapezoidal shape, the lower end of the second phase spacing plate 5 is closely matched with the third connecting groove 31, the upper end of the third phase spacing plate 6 is closely matched with the fourth connecting groove 222, and the upper end of the first phase spacing plate 4 is closely matched with the second connecting groove 11; the trapezoidal structure of the third connecting groove 31 and the fourth connecting groove 222 has a guiding effect on the plug-in and pull-out of the phase spacing plate, and simplifies the assembly operation; the close cooperation of the trapezoidal groove and the phase spacing plate greatly improves the sealing and stability of the connecting structure, can prevent the phase spacing plate from loosening and shifting under vibration or short-circuit impact, the close cooperation structure eliminates the insulation gap, avoids the occurrence of gap discharge phenomenon, strengthens the arc insulation effect, and significantly improves the operation reliability of the branch box under short-circuit fault working condition.

[0053] Each shell comprises a front shell 223 and a rear shell 224 arranged separately, the upper end of the front shell 223 and the rear shell 224 is provided with a threaded hole 225, and the shells are connected by screws, the shell and the edge cover 7 are also connected by screws, the lower end of the front shell 223 is provided with a positioning hole 226, and the lower end of the rear shell 224 is provided with a positioning column 227, the positioning column 227 is inserted and matched with the positioning hole 226, the shell adopts a split structure of the front shell 223 and the rear shell 224, the upper end is fastened and connected by screws, is convenient to disassemble and assemble, and is convenient for busbar row 21 maintenance; the lower end is inserted and matched by the positioning column 227 and the positioning hole 226, the precise positioning of the front shell 223 and the rear shell 224 is realized, the coaxiality during assembly is guaranteed, the busbar row 21 is prevented from being clamped and deviated due to the misplacement of the shell, the matching structure of the positioning column 227 and the positioning hole 226 can effectively disperse external force borne by the shell, improve the overall structural stability, prevent the shell from loosening due to vibration during operation, the screw connection mode of the shell and the edge cover 7 is firm and reliable in connection, and assembly convenience and protection performance are considered; a plurality of first protrusions 228 are arranged on the inner wall of the front shell 223, a plurality of second protrusions 229 are arranged on the inner wall of the rear shell 224, the first protrusions 228 and the second protrusions 229 are arranged correspondingly, and a clamping groove is formed between the two protrusions, the busbar 211 is located in the clamping groove, a third protrusion 230 is further arranged on the inner wall of the front shell 223 and the rear shell 224, the third protrusion 230 abuts against the lower end surface of the busbar 211, when the busbar 211 is installed in the shell 22, a gap is arranged between the busbar 211 and the inner wall of the shell 22, so as to facilitate heat dissipation and prevent heat accumulation and dissipation, the first protrusion 228 and the second protrusion 229 can also position the busbar row 21, prevent the busbar row 21 from shaking and affecting the use effect, and the design that the third protrusion 230 abuts against the lower end surface of the busbar 211 can effectively support the weight of the busbar, prevent the busbar from deforming due to gravity after long-term operation, avoid poor contact of the busbar joint, and prolong the service life of the busbar system 2.

[0054] The adjacent two shells can be indirectly connected through the connecting piece 9, the left and right end portions of the shell are provided with an insertion block 231, the connecting piece 9 is correspondingly provided with an insertion slot 91, the insertion block 231 is inserted into the insertion slot 91, and the adjacent shells are indirectly connected through the connecting piece 9 of the insertion block 231 and the insertion slot 91, so that the shell is quickly spliced, and the assembly efficiency is high; the guiding effect of the insertion block 231 and the insertion slot 91 can effectively compensate for the installation error, avoid stress concentration due to size deviation when the shell is spliced, and improve the anti-seismic performance of the shell structure.

Claims

1. An internal distribution structure of a branch box, characterized in that, The system includes a disconnecting switch (1), a busbar system (2), and a circuit breaker (3) connected sequentially along the vertical direction of the branch box. The busbar system (2) includes several phase busbars (21). Each phase busbar (21) includes an integrally formed busbar (211) and several branch busbars. The branch busbars include a first branch busbar (212) and a second branch busbar (213) located on both sides of the busbar (211). The first branch busbar (212) is connected to the disconnecting switch (1), and the second branch busbar (213) is connected to the circuit breaker (3). A first phase partition (4) is connected between the disconnecting switch (1) and the busbar system (21). The first phase partition (4) is located between two adjacent first branch busbars (212). A second phase partition (5) is connected between the circuit breaker (3) and the busbar system (2). The second phase partition (5) is located between two adjacent second branch busbars (213).

2. The internal distribution structure of the branch box according to claim 1, characterized in that, Each phase busbar (21) is covered with an outer shell (22). The busbar (211) is located inside the corresponding outer shell (22). The first branch busbar (212) and the second branch busbar (213) pass out from the upper and lower end faces of the outer shell (22) respectively. The upper and lower end faces of each outer shell (22) are provided with a first connecting groove (221). The disconnecting switch (1) is provided with a second connecting groove (11). The circuit breaker (3) is provided with a third connecting groove (31). The upper and lower ends of the first phase partition plate (4) are respectively inserted into the second connecting groove (11) and the first connecting groove (221). The upper and lower ends of the second phase partition plate (5) are respectively inserted into the first connecting groove (221) and the third connecting groove (31). There is a gap between each outer shell (22).

3. The internal distribution structure of the branch box according to claim 2, characterized in that, Each shell (22) includes several separately arranged shells. Each shell is sequentially fitted outside the busbar (211) along the length direction of the busbar (21). Adjacent shells are directly or indirectly connected. The ends of the shells at both ends are fitted with side covers (7) to form a closed structure.

4. The internal distribution structure of the branch box according to claim 2 or 3, characterized in that, A fracture structure (8) is integrally formed between two adjacent first connecting grooves (221). A gap (10) is provided between each fracture structure (8) and the upper and lower end faces of the outer shell (22) so that the fracture structure (8) breaks with the outer shell (22) to form an opening (83) for the branch busbar to extend out of the outer shell (22).

5. The internal distribution structure of the branch box according to claim 4, characterized in that, Each fracture structure (8) includes an integrally formed first piece (81) and a second piece (82). The left and right ends of the first piece (81) are integrally formed with the outer shell (22). The left and right ends of the second piece (82) are spaced apart from the outer shell (22). The end faces of the first piece (81) and the outer shell (22) are provided with gaps. The front end face of the first piece (81) and the front end face of the second piece (82) are staggered to form a stepped arrangement.

6. The internal distribution structure of the branch box according to claim 2 or 3, characterized in that, The circuit breaker (3) is provided in multiple ways. Each circuit breaker (3) is arranged along the length direction of the bus system (2). The lower end face of the housing (22) is also provided with a fourth connecting groove (222). The fourth connecting groove (222) is provided with a third phase spacer (6) inserted therein. The lower end of the third phase spacer (6) extends to the space between two adjacent circuit breakers (3).

7. The internal distribution structure of the branch box according to claim 3, characterized in that, Each housing includes a front housing (223) and a rear housing (224) that are separately configured. The upper ends of the front housing (223) and the rear housing (224) are provided with threaded holes (225) and are connected by screws. The housing and the side cover (7) are also connected by screws. The lower end of the front housing (223) is provided with a positioning hole (226) and the lower end of the rear housing (224) is provided with a positioning post (227). The positioning post (227) is inserted into the positioning hole (226).

8. The internal distribution structure of the branch box according to claim 3, characterized in that, The two adjacent shells can be indirectly connected by a connector (9). The left and right ends of the shells are provided with inserts (231), and the connector (9) is provided with corresponding slots (91). The inserts (231) are inserted into the slots (91).

9. The internal distribution structure of the branch box according to claim 7, characterized in that, The inner wall of the front shell (223) is provided with a plurality of first protrusions (228), and the inner wall of the rear shell (224) is provided with a plurality of second protrusions (229). The first protrusions (228) and the second protrusions (229) are provided correspondingly, and a clamping groove is formed between the two protrusions. The busbar (211) is located in the clamping groove. The inner walls of the front shell (223) and the rear shell (224) are also provided with a third protrusion (230), which abuts against the lower end face of the busbar (211).

10. The internal distribution structure of the branch box according to claim 6, characterized in that, The third connecting groove (31) and the fourth connecting groove (222) are arranged in a trapezoidal shape. The lower end of the second phase partition (5) is in close contact with the third connecting groove (31), the upper end of the third phase partition (6) is in close contact with the fourth connecting groove (222), and the upper end of the first phase partition (4) is in close contact with the second connecting groove (11).

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