CN120262211A

CN120262211A - A distribution box

Info

Publication number: CN120262211A
Application number: CN202510635528.4A
Authority: CN
Inventors: 吴文智; 李云敏; 曾焕苏; 俞巨松; 邵磊; 赵铭杰
Original assignee: Zhejiang Zhengtai Electric Technology Co ltd
Current assignee: Zhejiang Zhengtai Electric Technology Co ltd
Priority date: 2025-05-16
Filing date: 2025-05-16
Publication date: 2025-07-04

Abstract

The invention belongs to the technical field of electricity, and discloses a distribution box, wherein a reactive compensation chamber, a wire inlet chamber, a wire outlet chamber, a terminal chamber, a partition plate and an isolation box are arranged in the distribution box, the reactive compensation chamber is positioned at one side of the wire inlet chamber and is separated from the wire inlet chamber through the partition plate, the terminal chamber and the wire outlet chamber are arranged at one side of the wire inlet chamber, which is far away from the reactive compensation chamber, and the terminal chamber is positioned above the wire outlet chamber and is separated from the wire inlet chamber and the wire outlet chamber through the isolation box. One side of the reactive compensation chamber, which is away from the incoming line chamber, is provided with a first gate, and a first door which can be opened and closed is arranged at the first gate. The distribution box has multiple functions of incoming and outgoing lines, reactive compensation, terminal monitoring management and the like, improves the integration degree, is more reasonable and compact in layout, saves installation space and reduces cost. The orientation of the gate of reactive compensation room is all different with the gate orientation of inlet wire room and outlet wire room for the overall arrangement of block terminal is compacter reasonable, and the space of the different sides of make full use of block terminal reduces the maintenance management degree of difficulty.

Description

Distribution box

Technical Field

The invention relates to the technical field of electricity, in particular to a distribution box.

Background

The distribution box comprises a low-voltage distribution box, a high-voltage distribution box and the like, and is connected between the outlet end of the transformer and the user end, and converts and configures electric energy output by the transformer to supply power to the user end.

Various switches such as isolating switch, circuit breaker and the like are arranged in the box body of the low-voltage comprehensive distribution box, and are combined with a plurality of independent devices such as a metering box and a reactive compensation box according to a set wiring scheme to form a set of distribution equipment, and the devices such as the distribution box, the metering box and the reactive compensation box are independently arranged on the low-voltage side of a transformer, so that the installation and maintenance are complex, the cost is high, the occupied installation space is large, the layout rationality is poor, and the maintenance and management difficulty is large.

Accordingly, a new distribution box is needed to solve the above-mentioned problems of the prior art.

Disclosure of Invention

The invention aims to provide a distribution box, which can improve the integration degree of the distribution box, lead the layout in the distribution box to be more reasonable and compact, save the installation space, reduce the cost and reduce the maintenance and management difficulty.

To achieve the purpose, the invention adopts the following technical scheme:

the distribution box is internally provided with a reactive compensation chamber, an incoming line chamber, an outgoing line chamber, a terminal chamber, a partition plate and an isolation box;

The reactive compensation chamber is positioned at one side of the incoming line chamber and is separated from the incoming line chamber through the separation plate, the terminal chamber and the outgoing line chamber are arranged at one side of the incoming line chamber away from the reactive compensation chamber, the terminal chamber is positioned above the outgoing line chamber, and the terminal chamber is separated from the incoming line chamber and the outgoing line chamber through the separation box;

The reactive compensation room deviates from one side of inlet wire room is provided with first gate, first gate department is provided with the first chamber door that can open and shut.

As an alternative to the electrical box provided by the invention, the electrical box further comprises a busbar system and a harness structure, the busbar system being at least partially located in the inlet wire chamber; an incoming line switch is arranged in the incoming line chamber, a reactive compensation switch is arranged in the incoming line chamber or the outgoing line chamber, and the incoming line switch and the reactive compensation switch are both arranged in the bus system;

the first end of the incoming line switch is connected with a first connection row, the second end of the incoming line switch is provided with a second connection row, the first connection row penetrates out of the outer wall of the distribution box, and the second connection row is electrically connected with the bus system;

The reactive compensation system comprises a bus system, a reactive compensation switch, a capacitor, a reactive compensation device, a wire harness structure and a power supply system, wherein the first end of the reactive compensation switch is electrically connected with the bus system;

the partition plate is provided with a first threading hole and an operation opening in a penetrating mode, the wire harness structure is arranged in the first threading hole in a penetrating mode, and a first insulating cover plate is detachably covered at the operation opening.

As an alternative scheme of the distribution box provided by the invention, the distribution box further comprises a first mounting bracket and a second mounting bracket which are arranged at intervals;

the first mounting bracket is positioned in the incoming line chamber, and a first insulating support and a lightning arrester are arranged on the first mounting bracket; the first insulating support is connected between the first connecting row and the first mounting bracket; the lightning arrester is arranged on the reactive compensation loop;

The second mounting bracket extends from the incoming line chamber to the outgoing line chamber, a second insulating support and a surge protector are arranged on the second mounting bracket, the second insulating support is connected between the second connecting row and the second mounting bracket, and the surge protector, the incoming line switch and the bus system are connected to form a protection loop.

As an alternative scheme of the distribution box, a wire inlet communicated with the wire inlet chamber is formed in the outer wall of the distribution box, a second insulating cover plate and a wire inlet protective cover are arranged outside the outer wall of the distribution box, the wire inlet protective cover is arranged outside the second insulating cover plate, the wire inlet is covered by the second insulating cover plate, a second wire through hole is formed in the second insulating cover plate, and a first connecting row penetrates through the second wire through hole and stretches into the wire inlet protective cover.

As an alternative scheme of the distribution box, the distribution box is provided with an emergency wiring port capable of being communicated with the incoming line chamber and guide rails positioned on two opposite sides of the emergency wiring port, wherein the second connecting row extends towards the direction of the emergency wiring port, and the guide rails are connected with baffle structures in a sliding manner;

The baffle structure has a covering position and an avoidance position, the baffle structure is in the covering position and covers the emergency wiring port, and the baffle structure is in the avoidance position and does not cover the emergency wiring port.

As an alternative scheme of the distribution box provided by the invention, at least one heat dissipation channel is arranged in the distribution box;

At least one of the heat dissipation channels is located on a side of both the terminal chamber and the outlet chamber away from the inlet chamber.

As an alternative to the power distribution box provided by the present invention, the power distribution box includes a top cover assembly and a box body assembly;

the top cover assembly comprises a top cover plate, an inner partition plate and a side wall frame, wherein the top cover plate and the inner partition plate are arranged at intervals, and the side wall frame is connected between the top cover plate and the inner partition plate;

The box body assembly is connected with the inner partition plate, the reactive compensation chamber, the incoming line chamber, the outgoing line chamber, the terminal chamber, the partition plate and the isolation box are all located in a space defined by the box body assembly and the inner partition plate, the heat dissipation channel is arranged on the box body assembly, a second drainage vent hole is formed in the lowest point of the heat dissipation channel, and the second drainage vent hole sequentially passes through the heat dissipation channel, the first drainage vent hole and the ventilation space are communicated.

As an alternative scheme of the distribution box provided by the invention, the side wall frame comprises a first plate, a second plate, a third plate and a fourth plate which are sequentially connected in a bending way;

One end of the first plate, which is far away from the second plate, is connected to the edge of the top cover plate, the first plate is bent downwards relative to the top cover plate, the second plate is arranged below the top cover plate at intervals, the third plate is bent towards the direction close to the top cover plate, the fourth plate is bent towards the direction away from the first plate, a lap joint groove is formed between the third plate and the fourth plate, and one end of the fourth plate, which is far away from the third plate, is connected with the edge of the inner partition plate;

The box main body assembly is provided with a connecting part and a lap joint part, the connecting part extends along the circumferential direction of the inner partition plate and is connected with the edge of the inner partition plate, and the lap joint part is arranged along the periphery of the connecting part;

The side wall frame is lapped on the lap joint part through the lap joint groove.

As an alternative scheme of the distribution box provided by the invention, the box main body assembly comprises a side plate assembly and a bottom plate assembly which is arranged below the top cover assembly at intervals;

the side plate assembly comprises an inner side plate and an outer side plate which are arranged at intervals, wherein the first end of the inner side plate and the first end of the outer side plate are connected with the inner partition plate, and the second end of the inner side plate and the second end of the outer side plate are connected with the bottom plate assembly;

the first end of the inner side plate is provided with a first guide plate which extends obliquely towards the direction away from the outer side plate and is connected with the inner partition plate;

The second end of the inner side plate is provided with a second guide plate which extends obliquely towards the direction deviating from the outer side plate and is connected with the bottom plate assembly.

As an alternative scheme of the distribution box provided by the invention, a convex hull structure is convexly arranged on the inner partition plate towards the top cover plate, and a vent hole is arranged on the convex hull structure and a waterproof boss is convexly arranged on the inner partition plate towards the top cover plate;

The vent hole is communicated with the reactive compensation chamber, the incoming line chamber, the outgoing line chamber and the terminal chamber;

the waterproof boss is arranged around the circumference of the vent hole in a surrounding mode.

The top cover assembly comprises a top cover plate, a waterproof boss, a first heat dissipation hole, a first baffle plate, a second baffle plate, a first fixing plate, a second baffle plate, a third baffle plate, a first heat dissipation hole and a second heat dissipation hole, wherein the top cover plate is arranged in the ventilation space;

And/or the number of the groups of groups,

The inner partition plate is circumferentially provided with a first turning plate used for being connected with the box main body assembly and the side wall frame, the first turning plate is arranged at intervals with the convex hull structure, and the first drainage vent hole is positioned between the convex hull structure and the first turning plate;

The top cover assembly further comprises at least one second water baffle, the second water baffle comprises a second fixed plate and a second baffle which are connected, the second fixed plate is bonded and connected with the inner baffle, the second fixed plate is located between the convex hull structure and the first turnover plate, and the second baffle and the inner baffle are arranged at an included angle and extend obliquely towards the direction deviating from the convex hull structure.

The invention has the beneficial effects that:

The invention provides a distribution box, which can realize the normal wire inlet and outlet functions of the distribution box by arranging a wire inlet chamber and a wire outlet chamber in the distribution box so as to distribute electric energy to a user side, can perform reactive compensation on a line system in the distribution box by arranging a reactive compensation chamber for reactive compensation in the distribution box, improves the power factor of the line system, reduces the electric energy loss, improves the electric energy utilization efficiency, and can monitor and manage the running state of the distribution box by arranging a terminal chamber for collecting, monitoring and data transmission functions in the distribution box. The terminal chamber is arranged above the outlet chamber, so that the space of the outlet chamber on one side far away from the reactive compensation chamber can be fully utilized, the installation height position of the terminal chamber is convenient for operators to operate and check, and meanwhile, the outlet chamber is positioned below the terminal chamber and can be more close to the bottom region of the distribution box, the outlet is convenient in the bottom region, and the length of a cable used for outlet is saved to a certain extent. In addition, the terminal chamber is separated from the incoming line chamber and the outgoing line chamber through the isolation box, so that the device inside the terminal chamber can be protected from dust, moisture and the like, and the high temperature in the incoming line chamber and the outgoing line chamber can be prevented from adversely affecting the terminal chamber. An independent first box door is arranged for the reactive compensation chamber, and the first box door can be independently opened to overhaul, maintain and manage components in the reactive compensation chamber. Moreover, the reactive power compensation room is used for arranging the first gate setting of first chamber door in the one side that deviates from the inlet wire room for the reactive power compensation room is the form of opening the door for the side, and the orientation of the first gate of reactive power compensation room is all different with the gate orientation of inlet wire room and outlet wire room, makes the overall arrangement of block terminal more compact reasonable, and the space of the different sides of make full use of block terminal realizes reasonable subregion and opens the door in limited block terminal space. On the one hand, when the first box door of the reactive compensation chamber and the box doors corresponding to the incoming line chamber and the outgoing line chamber are opened at the same time, the first box door does not interfere the opening and closing of other box doors and does not limit the opening range of other box doors, on the other hand, a plurality of maintenance personnel can maintain and manage the incoming line chamber, the outgoing line chamber, the terminal chamber and the reactive compensation chamber at different sides of the distribution box at the same time, so that a plurality of maintenance personnel can not crowd on the same side of the distribution box to cause maintenance interference, the operation space during maintenance and management is enlarged, and the maintenance and management difficulty is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a first isometric view of a power distribution box provided in accordance with an embodiment of the present invention;

FIG. 2 is an exploded schematic view of a power distribution box provided in accordance with an embodiment of the present invention;

FIG. 3 is a first cross-sectional view of a power distribution box provided in accordance with an embodiment of the present invention;

fig. 4 is a schematic layout view of an incoming line room, an outgoing line room and a terminal room of the distribution box according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of the layout of the interior of a reactive compensation chamber of a distribution box provided in an embodiment of the present invention;

FIG. 6 is a schematic diagram of the wiring of electrical components within the electrical box provided in accordance with an embodiment of the present invention;

FIG. 7 is a schematic diagram of a reactive compensation chamber of a distribution box with hidden capacitors and reactive compensation devices according to an embodiment of the present invention;

FIG. 8 is an isometric view of a power distribution box according to an embodiment of the present invention with the second and third doors hidden;

fig. 9 is a second cross-sectional view of the electrical box provided in an embodiment of the present invention;

FIG. 10 is a first schematic installation view of a bus bar system and electrical components of a power distribution box according to an embodiment of the present invention;

FIG. 11 is a second schematic installation view of a bus bar system and electrical components of a power distribution box according to an embodiment of the present invention;

FIG. 12 is a second isometric view of a power distribution box provided in accordance with an embodiment of the present invention;

FIG. 13 is a schematic view of a rail plug structure in a reactive compensation room according to an embodiment of the present invention;

FIG. 14 is a partial view of FIG. 3;

fig. 15 is a schematic structural view of a top cover assembly of a distribution box according to an embodiment of the present invention;

FIG. 16 is a first partial cross-sectional view of a power distribution box provided in accordance with an embodiment of the present invention;

FIG. 17 is a second partial cross-sectional view of a power distribution box provided in accordance with an embodiment of the present invention;

Fig. 18 is a cross-sectional view of a top cover assembly of an electrical distribution box provided in an embodiment of the present invention;

fig. 19 is a schematic view showing the structure of an inner partition of a top cover assembly of a distribution box according to an embodiment of the present invention;

Fig. 20 is a schematic view showing the structure of an inner partition, a first water baffle and a second water baffle of a top cover assembly of a distribution box according to an embodiment of the present invention;

Fig. 21 is a third isometric view of a power distribution box provided in an embodiment of the invention.

In the figure:

1. A case; 2, a bus system, 4, a first mounting bracket, 5, a second mounting bracket, 6, a bus bracket, 7, a first insulating pillar, 8, a lightning arrester, 9, a second insulating pillar, 10, a surge protector, 20, a third mounting bracket, 30, a protection fuse, 40, a cable hoop, 50, a current transformer, 60 and a heat dissipation fan;

110. Reactive compensation chamber 120, incoming line chamber 130, outgoing line chamber 140, terminal chamber 150, splitter plate 160, isolation box 170, heat dissipation channel;

1101. capacitor 1102, reactive compensation device 1103, filter 1100, first gate;

1201. The reactive compensation system comprises a line inlet switch, a reactive compensation switch, a first connection row, a second connection row, a third connection row and a third connection row, wherein the line inlet switch 1202 and the reactive compensation switch 1203;

1301. an outlet switch;

1401. A station area intelligent fusion terminal;

1501. first threading hole 1502, operation port 1503, first insulating cover plate;

11. 12 parts of top cover components, 12 parts of box main body components, 13 parts of second insulating cover plates, 14 parts of incoming wire protective covers, 15 parts of base components, 16 parts of waterproof elbows;

111. top cover plate 112, inner partition plate 113, side wall frame 114, ventilation space 115, first water baffle plate 116, second water baffle plate 117, pressing strip;

1120. A first drainage vent hole, 1121, a convex hull structure, 1122, a vent hole, 1123, a waterproof boss, 1124 and a first turning plate;

1130. First heat radiation holes, 1131, a first plate, 1132, a second plate, 1133, a third plate, 1134, a fourth plate, 1135, and a lap joint groove;

1151. 1152, a first baffle;

1161. 1162, a second baffle;

121. side plate assembly, 122, bottom plate assembly, 123, back plate assembly, 124, second door, 125, third door, 126, first door, 127, connecting part, 128, overlap part;

1211. inner side plate, 1212, outer side plate, 1213, second heat dissipation holes;

12111. 12112, second guide plate;

1220. Emergency wiring port 1221, second drain vent hole 1222, guide rail 1224, baffle structure 1225, knock-out plate 1226, bottom wire hole 1227, third heat dissipation hole;

1231. A wire inlet;

131. a second threading hole;

151. a bottom peripheral frame 152, an inner support plate;

31. the device comprises a bracket, a guide rail plug structure, a fourth mounting bracket, a fifth mounting bracket and a guide rail plug structure, wherein the bracket is arranged on the guide rail plug structure;

321. guide rail groove 322, guide roller 323 and static plug-in.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The term "and/or" in this embodiment is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate that a exists alone, while a and B exist together, and B exists alone. In the present invention, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present invention, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity.

Fig. 1 is an overall perspective view of a power distribution box according to the present embodiment, fig. 2 is an exploded schematic view of the power distribution box according to the present embodiment, and fig. 3 is a cross-sectional view of the power distribution box according to the present embodiment. The distribution box can improve the integration degree, so that the distribution in the distribution box is more reasonable and compact, the installation space is saved, the cost is reduced, the maintenance and management difficulty is reduced, and the heat dissipation effect can be ensured.

Wherein the power distribution box comprises a box body 1, wherein the box body 1 defines a space for installing electric elements. Referring to fig. 1,2 and 3, a reactive compensation chamber 110, an incoming line chamber 120, an outgoing line chamber 130, a terminal chamber 140, a partition plate 150 and an isolation box 160 are provided in a box body 1 of the distribution box. The reactive compensation chamber 110 is located at one side of the incoming chamber 120 and is separated from the incoming chamber 120 by a partition plate 150, the terminal chamber 140 and the outgoing chamber 130 are located at one side of the incoming chamber 120 far away from the reactive compensation chamber 110, the terminal chamber 140 is located above the outgoing chamber 130, and the terminal chamber 140 is separated from the incoming chamber 120 and the outgoing chamber 130 by a partition box 160. The reactive compensation chamber 110 is provided with a first gate 1100 on a side facing away from the incoming line chamber 120, and a first door 126 capable of opening and closing is provided at the first gate 1100.

Specifically, a platform intelligent fusion terminal 1401 is disposed in the terminal room 140, and has the functions of real-time monitoring and fault studying and judging, optimizing the operation efficiency of the power distribution network, supporting new energy (such as photovoltaic grid connection) and diversified load access, intelligent operation and maintenance and work order driving, safety and communication guarantee and the like.

The normal line in-out function of the distribution box can be realized by arranging the line in-out chamber 120 and the line out chamber 130 in the distribution box so as to distribute electric energy to a user side, the reactive compensation chamber 110 for reactive compensation is arranged in the distribution box, the reactive compensation can be performed on a line system in the distribution box, the power factor of the line system is improved, the electric energy loss is reduced, the electric energy utilization efficiency is improved, and the running state of the distribution box can be monitored and managed by arranging the terminal chamber 140 for collecting, monitoring and data transmission functions in the distribution box, so that the distribution box has multiple functions of line in-out, reactive compensation, monitoring and management and the like, a plurality of independent box bodies 1 are not required to be arranged, the integration degree of the distribution box can be improved, the distribution in the distribution box is more reasonable and compact, the installation space is saved, and the cost is reduced. The terminal chamber 140 is arranged above the outlet chamber 130, so that the space of the inlet chamber 120 on one side far away from the reactive compensation chamber 110 can be fully utilized, the installation height position of the terminal chamber 140 is convenient for operators to operate and check, meanwhile, the outlet chamber 130 is arranged below the terminal chamber 140 and can be more close to the bottom area of the distribution box, the outlet is convenient to be carried out in the bottom area, and the length of a cable used for outlet is saved to a certain extent. In addition, since the terminal chamber 140 is separated from the incoming line chamber 120 and the outgoing line chamber 130 by the isolation box 160, protection effects such as dust prevention and moisture prevention can be provided for devices inside the terminal chamber 140, and adverse effects on the terminal chamber 140 due to high temperatures in the incoming line chamber 120 and the outgoing line chamber 130 can be prevented.

An independent first door 126 is provided for the reactive compensation chamber 110, and the first door 126 can be independently opened to perform maintenance and repair management on components in the reactive compensation chamber 110. Moreover, the reactive power compensation chamber 110 is used for arranging the first gate 1100 of the first chamber door 126 to be arranged at one side deviating from the incoming line chamber 120, so that the reactive power compensation chamber 110 is in a side-opening mode, the orientation of the first gate 1100 of the reactive power compensation chamber 110 is different from the orientations of the gates of the incoming line chamber 120 and the outgoing line chamber 130, the distribution box is more compact and reasonable, the space at different sides of the distribution box is fully utilized, and reasonable partition and opening are realized in a limited distribution box space. On the one hand, when the first door 126 of the reactive compensation chamber 110 and the doors corresponding to the incoming line chamber 120 and the outgoing line chamber 130 are opened simultaneously, the first door 126 does not interfere the opening and closing of other doors and does not limit the opening range of other doors, on the other hand, a plurality of maintenance personnel can maintain and manage the incoming line chamber 120, the outgoing line chamber 130, the terminal chamber 140 and the reactive compensation chamber 110 at different sides of the distribution box simultaneously, so that the plurality of maintenance personnel are not crowded at the same side of the distribution box to cause maintenance interference, the operation space during maintenance and management is enlarged, and the maintenance and management difficulty is reduced.

Referring to fig. 2, one side of both the incoming line chamber 120 and the outgoing line chamber 130 is provided with a second opening, the second opening is provided with a second door 124 and a third door 125 which can be opened in opposite directions, the second door 124 and the third door 125 can cover the second opening after both being closed, and one ends of the second door 124 and the third door 125 which are far from each other are hinged on the box body 1 of the distribution box. The incoming line compartment 120 may be exposed when the second door 124 is independently opened, and the outgoing line compartment 130 may be exposed when the third door 125 is opened. Specifically, in the present embodiment, the second door 124 and the third door 125 are perpendicular to the first door 126, the second door 124 and the third door 125 are disposed on the front surface of the distribution box, and the first door 126 is disposed on the side surface of the distribution box. In this embodiment, the separation plate 150 is made of galvanized sheet, and has good corrosion resistance.

In this embodiment, as shown in fig. 4, 5 and 6, the distribution box further includes a bus bar system 2, where the bus bar system 2 is at least partially located in the incoming line chamber 120, and in this embodiment, the bus bar system 2 extends from the incoming line chamber 120 into the outgoing line chamber 130. The inlet wire room 120 is provided with an inlet wire switch 1201, and the inlet wire switch 1201 is installed on the bus bar system 2 and is electrically connected with the bus bar system 2.

Specifically, the first end of the incoming line switch 1201 is connected with a first connection row 1203, the second end is provided with a second connection row 1204, the first connection row 1203 penetrates out of the outer wall of the box body 1 of the distribution box, and one end of the first connection row 1203 penetrating out of the outer wall of the box body 1 is used for being connected with an external lead, such as an overhead insulated cable, a power cable, a busbar or the like. The second connection row 1204 is electrically connected to the bus bar system 2, and electrically connects the external leads to the bus bar system 2. The first end of the incoming switch 1201 is an incoming end of the incoming switch 1201, and the second end of the incoming switch 1201 is an outgoing end of the incoming switch 1201. The first connection row 1203 extends upward from the incoming line switch 1201, and the second connection row 1204 extends downward from the incoming line switch 1201.

In this embodiment, the incoming line switch 1201 is a disconnecting switch, specifically a knife-fuse disconnecting switch.

Referring to fig. 4, a reactive compensation switch 1202 is disposed in the incoming or outgoing line room 120 or 130, and the reactive compensation switch 1202 is mounted on the bus bar system 2 and electrically connected to the bus bar system 2. Referring to fig. 5 and 6, a capacitor 1101 and a reactive compensation device 1102 are disposed in the reactive compensation chamber 110 and electrically connected for reactive compensation of the distribution box, which also includes a harness structure. The first end of the reactive compensation switch 1202 is electrically connected with the bus bar system 2, the capacitor 1101 and the reactive compensation device 1102 are electrically connected with the second end of the reactive compensation switch 1202 by a wire harness structure to form a reactive compensation loop, i.e. the capacitor 1101, the reactive compensation device 1102 and the reactive compensation switch 1202 are electrically connected by the wire harness structure to form a reactive compensation loop, and the reactive compensation switch 1202 is used for controlling the on-off of the reactive compensation loop.

In this embodiment, the partition plate 150 divides the space in the case 1 into a reactive compensation chamber 110 and a switching chamber, and the switching chamber includes a wire inlet chamber 120, a wire outlet chamber 130, and a terminal chamber 140 isolated by an isolation box 160, and the wire inlet chamber 120 is communicated with the wire outlet chamber 130. The incoming line switch 1201 and the reactive compensation switch 1202 are arranged in the incoming line chamber 120 in a centralized manner or respectively arranged in the incoming line chamber 120 and the outgoing line chamber 130, so that on-off management of each loop is facilitated, and the operation of each switch is more convenient.

In this embodiment, the reactive compensation switch 1202 is a circuit breaker, and the reactive compensation device 1102 is an SVG (static var Generator ). The SVG is provided with a harmonic compensation mode, a reactive power compensation mode and an unbalanced current compensation mode, and the working modes can be combined at will, so that the SVG has multiple protection functions of overvoltage, hardware overcurrent, software overcurrent, direct current voltage, overtemperature and the like, and has a fault automatic reset function. Capacitor 1101 is a smart capacitor.

Further, referring to fig. 7 and 8, a first threading hole 1501 and an operation port 1502 are provided on the partition plate 150 in a penetrating manner, a wire harness structure is provided on the first threading hole 1501 in a penetrating manner to electrically connect the capacitor 1101, the reactive compensation device 1102 and the reactive compensation switch 1202, and a first insulating cover plate 1503 is detachably covered at the operation port 1502. When wiring or maintenance is performed on the capacitor 1101 and the reactive compensation device 1102 in the reactive compensation chamber 110, the first insulating cover plate 1503 can be detached to open the operation port 1502, and operation is facilitated through the operation port 1502. The insulating property of the first insulating cover 1503 improves the safety at the time of operation.

In this embodiment, as shown in fig. 7, a plurality of first threading holes 1501 are formed in the partition plate 150, and the wiring between each electrical component in the reactive compensation chamber 110 and the electrical components in the wire inlet chamber 120, the wire outlet chamber 130 and the terminal chamber 140 is routed through the first threading holes 1501. Further, referring to fig. 5, a filter 1103 is further provided in the reactive compensation chamber 110, and the filter 1103 is electrically connected to the capacitor 1101 and the reactive compensation device 1102.

As shown in fig. 4 and 5, an outlet switch 1301 is provided in the outlet chamber 130, and the outlet switch 1301 is mounted on the bus bar system 2 and electrically connected to the bus bar system 2. One end of the outgoing line switch 1301 is an incoming line end, and is connected with the bus bar system 2, and the other end is an outgoing line end, and is used for connecting an outgoing line cable, and the outgoing line cable is led out of the box body 1 to supply power to a user. In this embodiment, two outlet switches 1301, which are all circuit breakers, are disposed in the outlet chamber 130. The intelligent circuit breaker has the basic protection functions of overload long-time delay protection, short-circuit short-time delay protection, short-circuit instantaneous protection and residual current protection, and has the additional protection functions of overvoltage protection, undervoltage protection, open-phase protection and zero-breaking protection, protection parameter setting comprises switching, alarming, action time limit, voltage and current fixed value, the intelligent circuit breaker has the three-phase voltage and three-phase current acquisition function, and can calculate active power, reactive power, apparent power, power factor, frequency, voltage and current, and has the communication function of fusing a terminal with a station through RS485, a communication mode of built-in extension broadband carrier wave and the like.

In this embodiment, the incoming switch 1201 is directly hung on the bus bar system 2, and the reactive compensation switch 1202 and the outgoing switch 1301 are both hung on the adapter of the bus bar system 2. The manner in which the individual switches are coupled to the bus bar system 2 is well known to those skilled in the art and will not be described here.

In this embodiment, the busbar system 2 is an integrated insulating enclosed busbar system, and includes a plurality of busbar arranged at intervals and busbar clamps for connecting the plurality of busbar, specifically, busbar clamps are disposed at least at two ends of the plurality of busbar, so as to fix the plurality of busbar. The integrated insulation enclosed bus system not only ensures the insulation distance between the bus bars, but also effectively reduces the volume of the bus system 2, saves the bus bars and insulating materials, simultaneously reduces connecting points, solves the problem that the primary side bus bars in a general distribution box are exposed and easily generate potential safety hazards, and effectively ensures the safety of the distribution box.

As shown in fig. 4 and 9, the distribution box further includes a first mounting bracket 4 and a second mounting bracket 5 disposed at intervals. A first mounting bracket 4 and a second mounting bracket 5 are fixed inside the housing 1 for providing a mounting basis.

Wherein the first mounting bracket 4 is located in the incoming line room 120 between the partition plate 150 and the isolation box 160, and the first mounting bracket 4 is provided with a first insulation support 7 and a lightning arrester 8 (see fig. 6). Referring to fig. 10 and 11, the first insulating support 7 is connected between the first connection row 1203 and the first mounting bracket 4. Specifically, the first connection row 1203 includes a vertical section connected to the incoming line switch 1201 and a horizontal extension section disposed at an angle to the vertical section, the horizontal extension section extends out of the outer wall of the box 1, and the first insulating support 7 is connected between the horizontal extension section and the first mounting bracket 4, so that on one hand, a supporting and fixing effect is provided for the horizontal extension section of the first connection row 1203, and on the other hand, a short circuit between the first connection row 1203 and the first mounting bracket 4 can be prevented, and a safety risk is reduced.

The lightning arrester 8 is arranged on the reactive compensation loop and used for providing overvoltage protection and lightning protection. Illustratively, the lightning arrester 8 is a zinc oxide lightning arrester.

With continued reference to fig. 4 and 9, and in combination with fig. 10 and 11, the second mounting bracket 5 extends from the incoming line chamber 120 to the outgoing line chamber 130 and is disposed below the first mounting bracket 4. The second mounting bracket 5 is provided with a second insulating strut 9, and the second insulating strut 9 is connected between the second connection row 1204 and the second mounting bracket 5.

Specifically, the second connection bank 1204 extends downward for providing an emergency connection when the power supply to the power distribution box is stopped, and the emergency connection is connected to the second connection bank 1204 to restore the power supply. The second mounting bracket 5 is located below the incoming line switch 1201, supports and fixes the second connection row 1204 through the second insulating support column 9, and keeps a space between the second connection row 1204 and the second mounting bracket 5, thereby improving insulating performance.

Further, a surge protector 10 is also provided on the second mounting bracket 5. The surge protector 10 is connected to the incoming side of the incoming switch 1201, and the surge protector 10, the incoming switch 1201 and the bus bar system 2 are connected to form a protection loop for providing lightning strike and overvoltage protection to the whole loop of the distribution box. As shown in fig. 4 and 6, the upper-stage protector of the surge protector 10 adopts a protection fuse 30 or a special surge backup protection, and the protection fuse 30 and the special surge backup protection can be selected differently according to different lightning surge and overvoltage degrees in various regions of the whole country, and different parameters such as maximum discharge current, waveform and the like.

Referring to fig. 10, a second end of the reactive compensation switch 1202 is provided with a third connection row 1205 extending downwards, which third connection row 1205 is for connection with the capacitor 1101 and the reactive compensation device 1102 by means of a wire harness structure. A third insulating strut is connected between the third connection row 1205 and the second mounting bracket 5 to provide support and fixing for the third connection row 1205, and to maintain a certain insulating distance between the third connection row 1205 and the second mounting bracket 5.

Illustratively, the first connection row 1203, the second connection row 1204, and the third connection row 1205 are copper rows, which has better electrical conductivity.

As shown in fig. 4, a third mounting bracket 20 is further disposed in the inlet chamber 120, and the third mounting bracket 20 is located between the partition plate 150 and the isolation box 160, and is spaced between the first mounting bracket 4 and the second mounting for fixedly mounting the protection fuse 30.

As shown in fig. 4,9, 10 and 11, a bus bar bracket 6 is further provided in the distribution box, and the bus bar bracket 6 extends from the inlet chamber 120 to the outlet chamber 130 for providing a mounting base for the bus bar system 2. Further, the bus bracket 6 is provided with a plurality of waist-shaped heat dissipation holes, so that the heat dissipation of the incoming line switch 1201, the reactive compensation switch 1202 and the outgoing line switch which are arranged on the bus system 2 is accelerated, and the overhigh temperature rise of each switch is avoided.

In this embodiment, referring to fig. 10, a plurality of current transformers 50 are further disposed in the incoming line room 120, the current transformers 50 are sleeved on the first connection row 1203, the first connection row 1203 is provided with three phases, and each phase is sleeved with one current transformer 50. The plurality of current transformers 50 includes a metering current transformer and a sampling current transformer.

Specifically, the distribution box comprises a metering unit, the metering unit comprises an electric energy meter, a junction box and a metering current transformer which are sequentially connected, and the metering current transformer is sleeved on one of the first connecting rows 1203. The power meter, terminal box may be disposed within the terminal chamber 140 defined by the isolation box 160. Further, the isolation box 160 is made of galvanized plates and is provided with a door body, and a transparent observation window is arranged on the door body, so that independent metering requirements are met.

In the distribution box of the present embodiment, the reactive compensation unit for providing reactive compensation includes a reactive compensation switch 1202, a reactive compensation device 1102 (SVG), and a plurality of capacitors 1101 (e.g. four integrated intelligent sub-compensation capacitors), where the SVG is connected to a sampling current transformer, and the sampling current transformer is sleeved on a first connection row 1203 at the inlet end of the inlet switch 1201. The reactive compensation unit formed by the reactive compensation switch 1202, the SVG and the plurality of capacitors 1101 can compensate reactive power of a system, improve power factor, dynamically compensate harmonic waves, improve electric energy quality, adjust unbalance of three-phase power consumption in a line and improve transmission stability of the line.

As shown in fig. 4, 9 and 12, a wire inlet 1231 communicated with the wire inlet chamber 120 is formed in the outer wall of the distribution box, a second insulating cover plate 13 and a wire inlet protective cover 14 are arranged on the outer wall of the distribution box, the wire inlet protective cover 14 is arranged outside the second insulating cover plate 13, the second insulating cover plate 13 covers the wire inlet 1231 and is provided with a second wire through hole 131, and the first connecting row 1203 penetrates through the second wire through hole 131 and stretches into the wire inlet protective cover 14. The second insulating cover plate 13 can not only seal the wire inlet 1231 arranged on the outer wall of the distribution box, but also provide a channel for the leading-out of the first connection row 1203, so that the sealing performance of the box body 1 and the insulating performance between the first connection row 1203 and the wire inlet 1231 are effectively ensured. The incoming wire protection cover 14 plays a better role in rain and dust prevention through covering the second insulating cover plate 13 and the first connecting row 1203.

The portion of the first connection row 1203 penetrating out of the second threading hole 131 is convenient for a user to directly wire the cable or lap the wire by using the copper bar. Illustratively, the first connection row 1203 passes through the back of the box body 1 of the distribution box to realize back outgoing, so that the distribution box and the transformer can be installed side by side, and the part of the first connection row 1203 passing through the second threading hole 131 is directly overlapped with the secondary busbar of the transformer, so that the installation and maintenance are convenient, the space is saved, and the cost is reduced. Further, the lower end of the wire-in shield 14 is open, through which the external wire enters the wire-in shield 14. The interior space of the incoming line protection cover 14, for example, satisfies the four-circuit 300mm ² section single-core low-voltage cable or 60 x 8 busbar direct access.

As shown in fig. 8 and 12, the distribution box is provided with an emergency junction 1220 which can communicate with the incoming line room 120, and guide rails 1222 located at opposite sides of the emergency junction 1220. The second connection row 1204 extends in the direction of the emergency junction 1220. Specifically, the bottom wall of the case 1 is provided with an emergency connection port 1220 in a penetrating manner, and the second connection row 1204 extends downward and is opposite to the emergency connection port 1220. Baffle structures 1224 are slidably connected to the guide rails 1222 on both sides of the emergency connection port 1220, wherein the baffle structures 1224 have a covering position and an avoiding position, the baffle structures 1224 cover the emergency connection port 1220 when in the covering position, and the baffle structures 1224 do not cover the emergency connection port 1220 when in the avoiding position. When normal power supply stops supplying power to the distribution box, the incoming line switch 1201 of the distribution box is controlled to be disconnected, the baffle structure 1224 is opened in a sliding mode, external emergency wiring enters the incoming line chamber 120 through the emergency wiring port 1220 and is connected to the second connection row 1204, and normal power supply of outgoing cables of the distribution box is achieved. When the power distribution box resumes normal power supply, the emergency wiring is removed, and the shutter structure 1224 is slid to cover the emergency wiring port 1220.

Specifically, the two side guide rails 1222 are each provided with a runner on a side facing each other, and the two side edges of the baffle structure 1224 are slidably disposed in the runners of the two guide rails 1222.

Further, a handle structure is coupled to the flap structure 1224 to facilitate manipulation of the flap structure 1224 to slide between the covering and stowed positions.

As shown in fig. 7, a vertically arranged two-layered bracket 31 is provided in the reactive compensation chamber 110 for mounting a reactive compensation device 1102 and four capacitors 1101. Two guide rail inserting and pulling structures 32 shown in fig. 13 are arranged on the bracket 31 of the upper layer, a reactive power compensation device 1102 and a capacitor 1101 are respectively installed and fixed, and three guide rail inserting and pulling structures 32 shown in fig. 13 are arranged on the bracket 31 of the lower layer, and three capacitors 1101 are respectively installed and fixed. The reactive power compensation device 1102 and the four capacitors 1101 are arranged in an upper layer and a lower layer, so that the layout is reasonable, and the vertical space is fully utilized.

Specifically, a guide rail groove 321 is formed in the guide rail plug structure 32, a plurality of guide rollers 322 are arranged at the bottom of the guide rail groove 321, a first end of the guide rail groove 321 is opened, so that a capacitor 1101 and a reactive compensation device 1102 can enter the guide rail groove 321, a static plug-in unit 323 is arranged at a second end of the guide rail groove 321, a movable plug-in unit is arranged on the capacitor 1101 and the reactive compensation device 1102, when the capacitor 1101 and the reactive compensation device 1102 are pushed into place along the guide rail groove 321, the movable plug-in unit is plugged into the static plug-in unit 323, and reliable connection and signal transmission of the capacitor 1101 and the reactive compensation device 1102 and the guide rail plug-in structure 32 are realized.

In this embodiment, the capacitors 1101 are in a modular structure, and each modular capacitor 1101 can be individually plugged and replaced, and is electrically connected through the rail plug structure 32. The static plug 323 arranged on the guide rail plug-in structure 32 is a secondary plug-in static plug-in, and the current capacity of the primary static plug-in is not less than 2 times of the rated current of the maximum capacity modularized capacitor 1101.

As shown in fig. 5 and 7, a fourth mounting bracket 33 and a fifth mounting bracket 34 are further provided in the reactive compensation chamber 110 above the upper bracket 31, the fifth mounting bracket 34 being higher than the fourth mounting bracket 33. Both the upper and lower ends of the capacitor 1101 and the reactive compensation means 1102 are provided with fixed plates. The lower end fixing plate of the lower capacitor 1101 is attached to the lower bracket 31 by a fastener such as a screw, and the upper end fixing plate is attached to the upper bracket 31 by a fastener such as a screw. The capacitor 1101 at the upper layer and the fixing plate at the lower end of the reactive compensation device 1102 are mounted on the bracket 31 at the upper layer by fasteners such as screws, and the fixing plate at the upper end is mounted on the fourth mounting bracket 33 by fasteners such as screws. The fifth mounting bracket 34 is used to provide a mounting basis for other components within the reactive compensation chamber 110.

In this embodiment, the first mounting bracket 4, the second mounting bracket 5, the third mounting bracket 20, the bus bar bracket 6, the bracket 31, the fourth mounting bracket 33 and the fifth mounting bracket 34 all adopt highly corrosion-resistant aluminum-zinc-coated plates, and the cut surfaces are subjected to corrosion-resistant treatment by painting. It will be appreciated that the installation plates, brackets, etc. for installing electrical components, which are not mentioned in the incoming line room 120, the outgoing line room 130, the terminal room 140, and the reactive compensation room 110, are all made of highly corrosion-resistant aluminum-zinc-coated plates, and the cut surfaces are subjected to corrosion-resistant treatment by painting.

In order to ensure safe operation of the distribution box, the box body 1 needs to have good dustproof, waterproof and heat dissipation functions. The prior distribution box usually adopts a fan to discharge heat generated when the electric element in the box body 1 works, and slowly radiates heat through the radiating holes on the side wall of the box body 1 when the fan is not started, and the top cover of the box body 1 is usually provided with a slope surface to prevent water from entering the box body 1, or a baffle is arranged in the top cover with a cavity and stops between the radiating holes on the top cover and the radiating holes communicated with the inner cavity of the top cover and the inner cavity of the box body 1 so as to prevent water from entering the box body 1 through the radiating holes on the top cover. The existing distribution box has the defects that the heat dissipation effect is to be improved, particularly, when a fan is not started, the heat dissipation effect is poor, the waterproof performance of the top cover of the box body 1 is to be improved, and the problem that rainwater and the like enter the box body 1 still possibly occurs.

The block terminal that this embodiment provided still can guarantee better radiating effect when the fan is not started, can improve heat dissipation and waterproof performance, makes the block terminal safe and stable operation for a long time, reduces the fault occurrence probability.

Specifically, at least one heat dissipation channel 170 is provided in the distribution box, and at least one heat dissipation channel 170 is located at a side of both the terminal chamber 140 and the outlet chamber 130 away from the inlet chamber 120. That is, the terminal chamber 140 and the outlet chamber 130 are arranged in the height direction of the distribution box, and in this embodiment, the heat dissipation path 170 extends in the height direction of the distribution box to be able to dissipate heat in the height direction for the internal space of the box 1.

By arranging the heat dissipation channel 170 at one side of the isolation box 160 and the outlet chamber 130, the heat dissipation and cooling effects on the terminal chamber 140 and the outlet chamber 130 can be improved, the problem that the terminal chamber 140 cannot timely dissipate heat due to being enclosed by the isolation box 160 is avoided, and the heat dissipation effect and the operation safety of the distribution box are improved.

Specifically, as shown in fig. 1 and 2, a box body 1 of the distribution box includes a top cover assembly 11 and a box body assembly 12. The upper end of the case main body assembly 12 is opened, and the top cover assembly 11 is sealed at the opening to form an inner space of the case 1 with the case main body assembly 12. Referring to fig. 14, 15 and 16, the top cover assembly 11 includes a top cover plate 111 and an inner partition plate 112 disposed at intervals, and a side frame 113 connected between the top cover plate 111 and the inner partition plate 112, wherein a ventilation space 114 is defined between the top cover plate 111, the side frame 113 and the inner partition plate 112, a first heat dissipation hole 1130 is disposed on the side frame 113, and a first drain ventilation hole 1120 is disposed on the inner partition plate 112. The tank main body assembly 12 is connected with the inner partition 112, the reactive compensation chamber 110, the incoming line chamber 120, the outgoing line chamber 130, the terminal chamber 140, the partition plate 150 and the isolation tank 160 are all located in a space surrounded by the tank main body assembly 12 and the inner partition 112, the heat dissipation channel 170 is arranged on the tank main body assembly 12, a second drainage vent 1221 is arranged at the lowest point of the heat dissipation channel 170, and the second drainage vent 1221 is communicated with the ventilation space 114 through the heat dissipation channel 170 and the first drainage vent 1120 in sequence.

Further, a heat radiation fan 60 is further provided inside the case main body assembly 12, and in combination with fig. 8, the case main body assembly 12 is further provided with a second heat radiation hole 1213, and the second heat radiation hole 1213 is used to communicate the heat radiation passage 170 with the external environment. When the heat radiation fan 60 is operated, the air in the case 1 is pumped out to the heat radiation channel 170 and can be exhausted through the second heat radiation hole 1213, the second water discharge vent 1221 at the bottom of the heat radiation channel 170 and the first heat radiation hole 1130 on the top cover assembly 11, and when the heat radiation fan 60 is not started, the cold air can enter into the heat radiation channel 170 from the second water discharge vent 1221, and the hot air in the heat radiation channel 170 is pushed upwards, so that one part of the hot air is exhausted through the second heat radiation hole 1213, and the other part of the hot air enters into the ventilation space 114 of the top cover assembly 11 through the first water discharge vent 1120 and finally is exhausted through the first heat radiation hole 1130.

When rain water or the like is caused to enter the ventilation space 114 of the top cover assembly 11 through the first heat sink 1130 due to the influence of weather or the like, the accumulated water flows into the heat sink 170 through the first drain vent 1120 of the inner partition 112, and finally flows out of the case 1 through the second drain vent 1221 at the bottom of the heat sink 170. Of course, the accumulated water entering the heat dissipation channel 170 through the second heat dissipation hole 1213 finally flows out of the case 1 through the second water drain vent 1221, thereby achieving a good waterproof effect.

Illustratively, the heat dissipation fan 60 in the present embodiment is a pluggable and replaceable axial flow heat dissipation fan with a metal casing. The air outlet of the heat dissipation fan 60 is communicated with the heat dissipation channel 170, and the start and stop of the heat dissipation fan 60 are consistent with the start and stop of the reactive compensation device 1102, namely, when the reactive compensation device 1102 is started, the heat dissipation fan 60 is synchronously started, and vice versa. The embodiment adopts a scheme of a quick-dismantling type cooling fan 60, and the quick-dismantling type cooling fan 60 is mainly divided into two parts, namely a fan base and a fan main body. The fan base is fixed on the inner side plate 1211 of the distribution box by bolts, and the fan main body and the fan base are fixed in a spinning mode and unlocked in a spinning mode through a buckle type structure. The fan main body is connected to a power supply by adopting a plug terminal. When overhauling or replacing, the plug terminal is manually disconnected, and the main body of the spinning fan is unlocked, so that the cooling fan 60 can be rapidly overhauled or replaced.

As shown in fig. 2, the box body assembly 12 includes a side plate assembly 121, a bottom plate assembly 122, a back plate assembly 123, and the first, second, and third box doors 126, 124, 125 described above, and the side plate assembly 121, the bottom plate assembly 122, the back plate assembly 123, the first, second, and third box doors 126, 124, 125 enclose an interior space that forms the box body assembly 12. The bottom plate assembly 122 is disposed below the top cover assembly 11 at intervals, and the side plate assembly 121, the back plate assembly 123, the first door 126, the second door 124, and the third door 125 are all connected between the top cover assembly 11 and the bottom plate assembly 122. The second box door 124 covers the incoming line chamber 120, the third box door 125 covers the isolation box 160 and the outgoing line chamber 130, and the first box door 126 is arranged on one side of the reactive compensation chamber 110 away from the incoming line chamber 120 and is used for covering the reactive compensation chamber 110. A side plate assembly 121 is disposed between the first door 126 and the partition plate 150, and a side plate assembly 121 is disposed between the third door 125 and the back plate assembly 123.

In this embodiment, the emergency connection port 1220 is disposed on the bottom plate assembly 122, and the incoming port 1231 is disposed on the back plate assembly 123.

In this embodiment, a heat dissipation channel 170 is also disposed on one side of the reactive compensation chamber 110, and the heat dissipation channel 170 on one side of the reactive compensation chamber 110 is located between the partition plate 150 and the first door 126 for dissipating heat of the reactive compensation chamber 110.

In this embodiment, the heat dissipation channel 170 is defined by the side plate assembly 121. One side of the reactive compensation chamber 110 is provided with a side plate assembly 121 with a heat dissipation channel 170, and the inner side wall of the side plate assembly 121 is provided with at least one heat dissipation fan 60, so that the reactive compensation chamber has good heat dissipation performance under the condition that the heat dissipation fan 60 is started or not started, and can drain water. The side of the isolation box 160 and the outlet chamber 130, which are far away from the partition plate 150, is provided with a side plate assembly 121 with a heat dissipation channel 170, and the inner side wall of the side plate assembly 121 is provided with at least one heat dissipation fan 60, so that the heat dissipation fan 60 has good heat dissipation performance under the condition of starting or not starting, and can drain water.

As shown in fig. 14, the side plate assembly 121 includes an inner plate 1211 and an outer plate 1212 disposed at a distance, wherein a first end of the inner plate 1211 and a first end of the outer plate 1212 are connected to the inner partition 112, a second end of the inner plate 1211 and a second end of the outer plate 1212 are connected to the bottom plate assembly 122, a heat dissipation channel 170 is formed between the inner plate 1211 and the outer plate 1212, and a second drain vent 1221 is provided in the bottom plate assembly 122. The heat radiation fan 60 is mounted on the inner plate 1211, and the second heat radiation hole 1213 is provided through the outer plate 1212. The first end of the inner plate 1211 is provided with a first guide plate 12111, the first guide plate 12111 extends obliquely in a direction away from the outer plate 1212 and is connected to the inner partition 112, and the second end of the inner plate 1211 is provided with a second guide plate 12112, the second guide plate 12112 extends obliquely in a direction away from the outer plate 1212 and is connected to the bottom plate assembly 122.

By providing the first guide plate 12111, on the one hand, the accumulated water flowing down from the first drain vent 1120 can be guided to reduce the drain noise and the splashing phenomenon during running water, and on the other hand, the hot air flowing in the direction can be guided to smoothly enter the ventilation space 114 through the first drain vent 1120 and smoothly be discharged through the first heat sink 1130. In addition, the arrangement of the first guide plate 12111 can increase the space at the upper end of the heat dissipation channel 170, so that water flow is not blocked when the water discharge is large, and the accumulated water in the ventilation space 114 can be rapidly discharged through the second drainage vent 1221 at the bottom of the heat dissipation channel 170. Furthermore, the inclined arrangement of the first guide plate 12111 enables one end connected to the inner partition 112 to be farther from the outer side plate 1212, so that more space for disposing the first drain vent 1120 can be reserved for the inner partition 112, the first drain vent 1120 can be disposed more densely or in a larger size, and the drain ventilation effect is enhanced.

By providing the second guide plate 12112, on the one hand, the water flowing to the second drain vent 1221 can be guided, and on the other hand, the space at the bottom of the heat dissipation channel 170 can be increased, the flow rate of the cold air entering the heat dissipation channel 170 can be increased, the heat dissipation air flow can be more sufficient and smoother, and the heat dissipation effect can be improved. In addition, the second guide plate 12112 can guide the cool air entering the heat dissipation channel 170, thereby reducing the air flow resistance and making the heat dissipation air flow smoother. Furthermore, the second guide plate 12112 is disposed obliquely away from the outer side plate 1212, so that the end of the second guide plate 12112 connected to the bottom plate assembly 122 is further away from the outer side plate 1212, so that more space for disposing the second drain vent 1221 can be reserved for the bottom plate assembly 122, and the second drain vent 1221 can be disposed more densely or in a larger size, thereby enhancing the drain and ventilation effect.

As shown in fig. 17 and 18, the side frame 113 includes a first plate 1131, a second plate 1132, a third plate 1133 and a fourth plate 1134 that are sequentially bent and connected, one end of the first plate 1131, which is far away from the second plate 1132, is connected to the edge of the top cover plate 111, the first plate 1131 is bent downwards relative to the top cover plate 111, the second plate 1132 is arranged below the top cover plate 111 at intervals, the third plate 1133 is bent towards the direction close to the top cover plate 111, the fourth plate 1134 is bent towards the direction away from the first plate 1131, a lap joint groove 1135 is formed between the third plate 1133 and the fourth plate 1134, one end of the fourth plate 1134, which is far away from the third plate 1133, is connected to the edge of the inner partition plate 112, and first heat dissipation holes 1130 are formed in the first plate 1131 and the second plate 1132. Specifically, the top cover 111, the first plate 1131 and the second plate 1132 are bent and connected to form a U-shaped structure, the first plate 1131, the second plate 1132 and the third plate 1133 are bent and connected to form a U-shaped structure, and the third plate 1133 and the fourth plate 1134 are bent and connected to form an L-shaped structure so as to define a lap joint groove 1135.

The tank main body assembly 12 is provided with a connecting portion 127 and a lap portion 128, the connecting portion 127 extending in the circumferential direction of the inner partition 112 and being connected to the edge of the inner partition 112. In particular, it may be a full-bond connection. The lap joint portion 128 is disposed along the outer periphery of the connection portion 127, the side frame 113 is erected on the lap joint portion 128 through a lap joint groove 1135, and the third plate 1133 and/or the fourth plate 1134 are connected with the lap joint portion 128, specifically may be full-welded connection. The overlap joint portion 128 is L type structure, with overlap joint groove 1135 looks adaptation, including the horizontal segment and the vertical section of perpendicular setting, and the third board 1133 is leaned on with vertical section, and the fourth board 1134 is leaned on with the horizontal segment, can ensure to connect stably between top cap subassembly 11 and the case main part subassembly 12, not relative displacement.

The side frame 113 is designed such that the second plate 1132 is located at the outer side of the case main body assembly 12, and the entire top cover assembly 11 can completely cover the case main body assembly 12, thereby improving the rainproof performance. As shown in fig. 5, the vertical distance between the outer contour of the header assembly 11 and the outer contour of the tank main body assembly 12 is H1, H1 being not less than 10mm. Meanwhile, the second plate 1132 is lower in height than the fourth plate 1134, and the second plate 1132 is the lowest point of the entire top cap assembly 11, so that the first heat dissipating holes 1130 provided thereon can drain water.

Specifically, the above-described connecting portion 127 and the lap portion 128 are provided on the door frames of the side plate assembly 121, the back plate assembly 123, and the first, second, and third doors 126, 124, 125.

More specifically, inner bulkhead 112 is circumferentially provided with a first turndown plate 1124 for connecting to tank main assembly 12 and side frames 113, and first turndown plate 1124 is bent in a direction away from top deck 111. The connecting portion 127 of the box main body assembly 12 is a second flap provided to be folded over the lap portion 128, and the second flap is folded in a direction approaching the top cover 111. The first folding plate 1124 is attached to the outer side of the second folding plate, and is connected to the second folding plate and the fourth plate 1134 of the side frame 113. Illustratively, the first turndown plate 1124 and the second turndown plate, and the first turndown plate 1124 and the fourth panel 1134 are all welded.

As shown in fig. 15, 16, 18 and 19, the inner partition 112 is provided with a convex hull structure 1121 protruding toward the top cover 111, and the convex hull structure 1121 is provided with a vent hole 1122 and a waterproof boss 1123 protruding toward the top cover 111. The convex hull structure 1121 is disposed in the middle of the inner partition 112, that is, the inner partition 112 has a top-type structure with a high middle and a low periphery. The vent hole 1122 is communicated with the reactive compensation chamber 110, the incoming line chamber 120, the outgoing line chamber 130 and the terminal chamber 140, so that air in the reactive compensation chamber 110, the incoming line chamber 120, the outgoing line chamber 130 and the terminal chamber 140 can flow out through the vent hole 1122, the ventilation space 114 and the first heat dissipation hole 1130 in sequence, and heat dissipation in the box body 1 is achieved. By providing the convex hull structure 1121 protruding upward, the water flow entering the ventilation space 114 can flow around the convex hull structure 1121 and be discharged through the first water discharge ventilation hole 1120 or the first heat radiation hole 1130 on the second plate 1132. Further, a waterproof boss 1123 is provided around the circumference of the vent 1122. The waterproof boss 1123 is provided to effectively block rainwater and the like from entering the space of the case 1 through the ventilation hole 1122.

As shown in fig. 16, an H2 gap is maintained between the top surface of the convex hull structure 1121 and the top cover plate 111, which is not less than 35mm, ensuring that the ventilation space 114 is sufficiently large and ensuring heat dissipation and ventilation efficiency. One or more, for example, four, six, etc., of the ventilation holes 1122 in the inner partition 112 may be circular holes having a diameter of not less than 100mm or square holes having an area corresponding to the circular holes. The edge of the vent 1122 is treated by a stretching process to form the waterproof boss 1123, and the stretching height is not less than 6mm (the thickness of the inner partition 112 is not included), so that the waterproof boss 1123 is effectively waterproof.

As shown in fig. 18 and 20, the top cover assembly 11 further includes at least one first water baffle 115 located in the ventilation space 114, the first water baffle 115 includes a first fixing plate 1151 and a first baffle 1152 connected to each other, the first fixing plate 1151 is attached to and connected to the top cover 111, the first baffle 1152 is disposed at an angle to the top cover 111 and is stopped between the waterproof boss 1123 and the first heat dissipating hole 1130, and the first baffle 1152 extends obliquely from the first fixing plate 1151 in a direction away from the waterproof boss 1123. The first water baffle 115 is provided to effectively block rainwater and the like from entering the vent 1122. The first fixing plate 1151 and the top cover 111 may be connected by a stud, a rivet, or the like, without limitation. The first water baffles 115 are arranged at intervals along the length direction of the top cover plate 111, two first water baffles 115 are arranged at intervals along the width direction of the top cover plate 111, and four first water baffles 115 are connected to form a structure similar to an umbrella cover, are covered on the peripheries of the plurality of vent holes 1122, and prevent water from entering the vent holes 1122.

The first turndown plate 1124 circumferentially of the inner partition 112 is spaced from the convex hull structure 1121, and the first drain vent 1120 is located between the convex hull structure 1121 and the first turndown plate 1124. The top cover assembly 11 further comprises at least one second water baffle 116, wherein the second water baffle 116 comprises a second fixed plate 1161 and a second baffle 1162 which are connected, the second fixed plate 1161 is attached to and connected with the inner baffle 112, the second fixed plate 1161 is located between the convex hull structure 1121 and the first turnover plate 1124, and the second baffle 1162 is arranged at an included angle with the inner baffle 112 and extends obliquely towards a direction deviating from the convex hull structure 1121. The second fixing plate 1161 and the inner partition 112 may be connected by a stud, a rivet, or the like, without limitation. The arrangement of the second water baffle 116 can prevent rainwater and the like from entering the position of the first turnup plate 1124, so that the rainwater is prevented from entering the box body 1 through the connecting joint between the first turnup plate 1124 and the box body assembly 12, and the waterproof performance is further improved. Meanwhile, since the first drainage vent 1120 is located between the convex hull structure 1121 and the first turnup plate 1124, accumulated water can be drained through the first drainage vent 1120 before reaching the first turnup plate 1124, thereby ensuring good drainage.

Illustratively, the inner separator 112 is provided with a second water baffle 116 at both ends in the width direction.

Further, referring to fig. 18, an extension line of the first baffle 1152 of the first water baffle 115 crosses the second baffle 1162 without crossing the second baffle 1162, so that water flows along the first baffle 1152 toward the inner side of the second baffle 1162 without flowing to the outer side of the second baffle 1162.

In this embodiment, as shown in fig. 20, an insulating layer, such as a flame retardant material such as rock wool, is provided on the inner separator 112, and the insulating layer is fixed to the inner separator 112 by a bead 117.

In this embodiment, the overall thickness of the top cover assembly 11 is 70 mm-100 mm, and the protection level of the first heat dissipation hole 1130 disposed thereon is not lower than IP3X.

As shown in fig. 3 and 8, the outlet cable in the present embodiment realizes bottom and side outlet through the bottom plate assembly 122 and the side plate assembly 121. Specifically, a side plate assembly 121 located at one side of the isolation box 160 is provided with a side wire outlet hole where the waterproof elbow 16 bent downward is installed. As shown in fig. 12, a knock-out plate 1225 is provided on the base plate assembly 122, and when the distribution box is outgoing, a user can knock the knock-out plate 1225 to remove, and after removing, a bottom outlet 1226 is formed in the base plate assembly 122. The outgoing cable connected to the outgoing terminal of the outgoing switch 1301 is led out through the side outgoing hole and the bottom outgoing hole 1226. The cable hoops 40 are disposed inside the side wire hole and the bottom wire hole 1226 to form a bundle of wire-outgoing cables, so that the wire-outgoing cables are distributed neatly. Insulating through-coils (such as rubber through-coils) are arranged at the side wire outlet holes and the bottom wire outlet holes 1226, so that insulation of wire outlet positions is ensured, and abrasion to a wire outlet cable can be reduced.

Further, the base assembly 15 is further covered with a third heat dissipation hole 1227, and cold air can enter the box 1 through the third heat dissipation hole 1227, so that hot air is pumped away by the heat dissipation fan 60, or is discharged through the air hole 1122, the ventilation space 114 and the first heat dissipation hole 1130 on the inner partition 112 without opening the heat dissipation fan 60. The bottom wall of the isolation box 160 is provided with a fourth heat radiation hole, and the fourth heat radiation hole communicates with the ventilation space 114 through the terminal chamber 140 and the ventilation hole 1122, thereby realizing heat radiation of the terminal chamber 140.

As shown in fig. 21, base members 15 are further provided at both ends of the floor member 122, and the base members 15 serve to support the tank main body member 12. The base assembly 15 includes a bottom frame 151 and an inner support plate 152, the bottom frame 151 is a hollow structure, and the inner support plate 152 is disposed inside the bottom frame 151, so as to improve the strength and the bearing capacity of the base assembly 15. The bottom enclosure 151 with the hollow structure can avoid shielding the second drainage vent 1221 on the bottom plate assembly 122, so that the flowing water can be smoothly discharged, and the cooling air can smoothly enter the heat dissipation channel 170 through the second drainage vent 1221.

In this embodiment, the first door 126, the second door 124 and the third door 125 are all of a double-layer plate structure, including an inner door plate and an outer door plate which are arranged at intervals, a thermal insulation layer, such as a rock wool thermal insulation layer, is arranged between the inner door plate and the outer door plate, and covers other parts except the sealing strip and the door lock as much as possible when the thermal insulation layer is arranged, so as to play an effective flame retardant role.

In this embodiment, the back plate assembly 123 is also a double-layer plate structure, including an inner back plate and an outer back plate that are disposed at intervals, and a heat insulating layer, such as a rock wool heat insulating layer, is disposed between the inner back plate and the outer back plate.

In the embodiment, the case 1 is made of 304 stainless steel with the thickness of 2.0mm, and the surface is treated by matte treatment, so that the protection grade IP44 is realized.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The distribution box is characterized in that a reactive compensation chamber (110), an incoming line chamber (120), an outgoing line chamber (130), a terminal chamber (140), a separation plate (150) and an isolation box (160) are arranged in the distribution box;

The reactive compensation chamber (110) is located at one side of the incoming line chamber (120) and is separated from the incoming line chamber (120) through the separation plate (150), the terminal chamber (140) and the outgoing line chamber (130) are arranged at one side of the incoming line chamber (120) away from the reactive compensation chamber (110), the terminal chamber (140) is located above the outgoing line chamber (130), and the terminal chamber (140) is separated from the incoming line chamber (120) and the outgoing line chamber (130) through the separation box (160);

One side of the reactive compensation chamber (110) deviating from the incoming line chamber (120) is provided with a first gate (1100), and a first door (126) capable of being opened and closed is arranged at the first gate (1100).

2. The distribution box according to claim 1, further comprising a bus bar system (2) and a wire harness structure, wherein the bus bar system (2) is at least partially positioned in the wire inlet chamber (120), a wire inlet switch (1201) is arranged in the wire inlet chamber (120), a reactive compensation switch (1202) is arranged in the wire inlet chamber (120) or the wire outlet chamber (130), and the wire inlet switch (1201) and the reactive compensation switch (1202) are both installed on the bus bar system (2);

The first end of the incoming line switch (1201) is connected with a first connection row (1203), the second end of the incoming line switch is provided with a second connection row (1204), the first connection row (1203) penetrates out of the outer wall of the distribution box, and the second connection row (1204) is electrically connected with the bus system (2);

A capacitor (1101) and a reactive compensation device (1102) which are electrically connected are arranged in the reactive compensation chamber (110), and the capacitor (1101) and the reactive compensation device (1102) are electrically connected with a second end of the reactive compensation switch (1202) through the wire harness structure so as to form a reactive compensation loop;

The partition plate (150) is provided with a first threading hole (1501) and an operation port (1502) in a penetrating mode, the wire harness structure is arranged in the first threading hole (1501) in a penetrating mode, and a first insulating cover plate (1503) is detachably covered at the operation port (1502).

3. The electrical box according to claim 2, further comprising a first mounting bracket (4) and a second mounting bracket (5) arranged at intervals;

The first mounting bracket (4) is positioned in the incoming line chamber (120), a first insulating support (7) and a lightning arrester (8) are arranged on the first mounting bracket (4), the first insulating support (7) is connected between the first connecting row (1203) and the first mounting bracket (4), and the lightning arrester (8) is arranged on the reactive compensation loop;

The second mounting bracket (5) extends from the incoming line chamber (120) to the outgoing line chamber (130), a second insulating support (9) and a surge protector (10) are arranged on the second mounting bracket (5), the second insulating support (9) is connected between the second connecting row (1204) and the second mounting bracket (5), and the surge protector (10), the incoming line switch (1201) and the bus system (2) are connected to form a protection loop.

4. The distribution box according to claim 2, wherein a wire inlet (1231) communicated with the wire inlet chamber (120) is formed in the outer wall of the distribution box, a second insulating cover plate (13) and a wire inlet protective cover (14) are arranged on the outer wall of the distribution box, the wire inlet protective cover (14) is covered outside the second insulating cover plate (13), the second insulating cover plate (13) covers the wire inlet (1231) and is provided with a second wire through hole (131), and the first connecting row (1203) penetrates through the second wire through hole (131) and stretches into the wire inlet protective cover (14).

5. The distribution box according to claim 2, characterized in that the distribution box is provided with an emergency wiring port (1220) which can be communicated with the incoming line room (120) and guide rails (1222) positioned on two opposite sides of the emergency wiring port (1220), wherein the second connection row (1204) extends towards the direction of the emergency wiring port (1220), and a baffle structure (1224) is connected on the guide rails (1222) in a sliding way;

The baffle structure (1224) has a covering position and an avoidance position, the baffle structure (1224) covers the emergency junction port (1220) when in the covering position, and the baffle structure (1224) does not cover the emergency junction port (1220) when in the avoidance position.

6. The electrical box according to any one of claims 1-5, characterized in that at least one heat dissipation channel (170) is provided in the electrical box;

at least one of the heat dissipation channels (170) is located on a side of both the terminal chamber (140) and the outlet chamber (130) remote from the inlet chamber (120).

7. The electrical box according to claim 6, characterized in that the electrical box comprises a top cover assembly (11) and a box body assembly (12);

The top cover assembly (11) comprises a top cover plate (111) and an inner partition plate (112) which are arranged at intervals, and a side wall frame (113) connected between the top cover plate (111) and the inner partition plate (112), wherein a ventilation space (114) is formed by surrounding the top cover plate (111), the side wall frame (113) and the inner partition plate (112), a first heat dissipation hole (1130) is formed in the side wall frame (113), and a first drainage ventilation hole (1120) is formed in the inner partition plate (112);

The utility model discloses a reactive compensation chamber, including box main body assembly (12) and interior baffle (112), reactive compensation chamber (110), inlet wire room (120), outlet wire room (130), terminal room (140), division board (150) and isolation case (160) all are located box main body assembly (12) with interior baffle (112) enclose the space of establishing, be provided with on box main body assembly (12) heat dissipation channel (170), the nadir of heat dissipation channel (170) is provided with second drainage ventilation hole (1221), second drainage ventilation hole (1221) are passed through in proper order heat dissipation channel (170) first drainage ventilation hole (1120) with ventilation space (114) intercommunication.

8. The power distribution box according to claim 7, wherein the side frame (113) comprises a first plate (1131), a second plate (1132), a third plate (1133) and a fourth plate (1134) which are sequentially connected in a bending manner;

One end of the first plate (1131) far away from the second plate (1132) is connected to the edge of the top cover plate (111), the first plate (1131) is bent downwards relative to the top cover plate (111), the second plate (1132) is arranged below the top cover plate (111) at intervals, the third plate (1133) is bent towards the direction close to the top cover plate (111), the fourth plate (1134) is bent towards the direction away from the first plate (1131), a lap joint groove (1135) is formed between the third plate (1133) and the fourth plate (1134), and one end of the fourth plate (1134) far away from the third plate (1133) is connected with the edge of the inner partition plate (112);

the box main body assembly (12) is provided with a connecting part (127) and a lap part (128), the connecting part (127) extends along the circumferential direction of the inner partition board (112) and is connected with the edge of the inner partition board (112), and the lap part (128) is arranged along the periphery of the connecting part (127);

the side frame (113) is arranged on the lap joint part (128) through the lap joint groove (1135);

And/or the number of the groups of groups,

The box main body assembly (12) comprises a side plate assembly (121) and a bottom plate assembly (122) which is arranged below the top cover assembly (11) at intervals;

The side plate assembly (121) comprises an inner side plate (1211) and an outer side plate (1212) which are arranged at intervals, wherein the first end of the inner side plate (1211) and the first end of the outer side plate (1212) are connected with the inner partition plate (112), the second end of the inner side plate (1211) and the second end of the outer side plate (1212) are connected with the bottom plate assembly (122), the heat dissipation channel (170) is formed between the inner side plate (1211) and the outer side plate (1212), and the second water drainage vent hole (1221) is formed in the bottom plate assembly (122);

a first end of the inner plate (1211) is provided with a first guide plate (12111), and the first guide plate (12111) extends obliquely in a direction away from the outer plate (1212) and is connected with the inner partition plate (112);

the second end of the inner plate (1211) is provided with a second guide plate (12112), and the second guide plate (12112) extends obliquely in a direction away from the outer plate (1212) and is connected with the bottom plate assembly (122).

9. The distribution box according to claim 7, wherein a convex hull structure (1121) is convexly arranged on the inner partition board (112) towards the top cover board (111), and a vent hole (1122) is formed on the convex hull structure (1121) and a waterproof boss (1123) is convexly arranged towards the top cover board (111);

the vent hole (1122) is communicated with the reactive compensation chamber (110), the incoming line chamber (120), the outgoing line chamber (130) and the terminal chamber (140);

The waterproof boss (1123) is circumferentially arranged around the vent hole (1122).

10. The electrical box of claim 9, wherein the top cover assembly (11) further comprises at least one first water deflector (115) positioned within the plenum (114), the first water deflector (115) comprising a first fixed plate (1151) and a first baffle (1152) connected, the first fixed plate (1151) being attached to and connected to the top cover plate (111), the first baffle (1152) being disposed at an angle to the top cover plate (111) and stopped between the waterproof boss (1123) and the first heat sink (1130), the first baffle (1152) extending obliquely from the first fixed plate (1151) in a direction away from the waterproof boss (1123);

And/or the number of the groups of groups,

The inner partition plate (112) is provided with a first turning plate (1124) which is used for being connected with the box main body assembly (12) and the side wall frame (113) along the circumferential direction, the first turning plate (1124) is arranged at intervals with the convex hull structure (1121), and the first water discharge ventilation hole (1120) is positioned between the convex hull structure (1121) and the first turning plate (1124);

The top cover assembly (11) further comprises at least one second water baffle (116), the second water baffle (116) comprises a second fixed plate (1161) and a second baffle (1162) which are connected, the second fixed plate (1161) is attached to and connected with the inner baffle (112), the second fixed plate (1161) is located between the convex hull structure (1121) and the first turning plate (1124), and the second baffle (1162) and the inner baffle (112) are arranged in an included angle and extend obliquely towards the direction deviating from the convex hull structure (1121).