Modular power distribution cabinet

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a modular power distribution cabinet which comprises a cabinet body and a power distribution drawer, the power distribution drawer is composed of a control frame and a conversion base, when the modular power distribution cabinet is used, a floating guide structure in a butt joint part starts to play a role, and even if tiny alignment deviation exists between the power distribution drawer and the butt joint part in the cabinet body, the power distribution drawer does not fall off. The floating guide structure can also allow the butt joint part to perform self-adaptive floating and fine tuning within a certain range, so that the butt joint part is guided to be in smooth and progressive contact with a conductive terminal on the circuit breaker in an inclined or deflection mode, the purpose of buffer butt joint is achieved, rigid collision and lateral stress are effectively avoided in the process, and the service life of the circuit breaker is prolonged. Meanwhile, the guide slot arranged on the side wall of the conversion base is matched with the back part of the butt joint part, so that accurate horizontal and longitudinal guidance is provided for the reciprocating motion of the butt joint part, the butt joint part is prevented from twisting or clamping stagnation in the motion process, and the smoothness of the transmission and butt joint process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution cabinet, and particularly relates to a modular power distribution cabinet. BACKGROUND

[0002] The power distribution cabinet is a key equipment for power distribution, control and circuit protection in the power system, wherein the drawer type power distribution cabinet is widely applied due to convenient maintenance and high space utilization, and the existing drawer type power distribution cabinet generally comprises a cabinet body and a pullable power distribution drawer, and important electrical elements such as circuit breakers are arranged in the drawer.

[0003] For example, a Chinese patent with the application number CN 202410617650.4 discloses a load end drawer type power distribution cabinet, a fuse compensation structure and a compensation method. When the drawer is pulled to the end of the stroke, the lifting plate cooperates with the follower to lock the pulley, which can prevent the drawer from separating from the box and falling due to excessive movement, and the horizontal force acting on the drawer due to misoperation can be buffered by the first spring, thereby preventing the box from sliding and improving the stability of the power distribution cabinet. However, in the actual use process, when the power distribution drawer is pushed in to be connected with the busbar in the cabinet body, high docking accuracy is required, and if there is a position deviation, rigid collision between the conductive terminal of the drawer and the busbar is likely to occur, which may cause misalignment, excessive plugging force and other problems. This not only makes the operation difficult, but also damages the conductive terminal in the long-term use, affects the contact reliability, even generates arc, and has safety hazards. SUMMARY

[0004] Therefore, the present application aims to provide a modular power distribution cabinet to solve the technical problem that the existing technology requires high docking accuracy when the power distribution drawer is pushed in to be connected with the busbar in the cabinet body, and if there is a position deviation, rigid collision between the conductive terminal of the drawer and the busbar is likely to occur, which may cause misalignment, excessive plugging force and other problems. This not only makes the operation difficult, but also damages the conductive terminal in the long-term use, affects the contact reliability, even generates arc, and has safety hazards.

[0005] In order to achieve the above purpose, the present application provides a modular power distribution cabinet, which comprises a cabinet body and a power distribution drawer, the power distribution drawer is composed of a control frame and a conversion base, a circuit breaker is arranged on the conversion base, the circuit breaker is connected with the cabinet body through a conductive wire unit, the power distribution drawer is modular and multiple groups, and the multiple groups of power distribution drawers are arranged in the cabinet body through a slide. An interfacing part arranged in the conversion base, a floating guide structure is arranged in the interfacing part, so as to buffer and interface the conductive terminal on the circuit breaker during the sliding process of the power distribution drawer; A guide slot is arranged on the side wall of the conversion base, and the guide slot is matched with the back of the docking part in the horizontal direction; A transmission assembly is arranged for driving the reciprocating movement of the docking part.

[0006] Further, the floating guide structure comprises a spherical universal joint arranged in the docking part, and a spring set arranged around the conductive terminal, and the spring set provides radial and axial buffer compensation.

[0007] Further, an elastic conductive unit is arranged on the docking part, and the conductive terminal on the circuit breaker is arranged as a plane static contact, and the elastic conductive unit is vertically pressed with the plane static contact during docking.

[0008] Further, a plurality of guide holes are arranged on the guide slot, and the specifications of the plurality of guide holes are gradually changed, and the guide slot is adjustably arranged on the side wall of the conversion base.

[0009] Further, the transmission assembly comprises: a mounting frame arranged in the conversion base; a rotating shaft arranged on the mounting frame, and gears one and two are arranged on both sides of the rotating shaft; gear racks one and two are slidingly arranged on the mounting frame, and the gear racks one and two are respectively engaged with both sides of the gear one; a magnetic suction head arranged at the end of the gear rack one; a hand wheel is slidingly arranged on the power distribution drawer, and the end of the magnetic suction head is connected with the hand wheel; a gear rack three is slidingly arranged on the mounting frame, the gear rack three is perpendicular to the movement track of the gear rack one, and the docking part is fixedly connected with the gear rack three.

[0010] Further, the movement tracks of the gear racks one and two are parallel.

[0011] Further, two hand wheels are arranged on one power distribution drawer, a rotating disc is arranged on the hand wheel, and the magnetic suction head is limitingly and slidingly arranged on the rotating disc.

[0012] Further, a clamping head is arranged at the port of the control frame, and an independent module locking plate is clamped on the clamping head.

[0013] Further, when any one of the power distribution drawers is in the extracted state, the adjacent live power distribution drawer is not affected.

[0014] Further, independent heat dissipation air ducts are integrated on the top and bottom of the cabinet, and the heat dissipation paths of the heat dissipation air ducts extend to a plurality of groups of power distribution drawers.

[0015] The beneficial effects of the present application: when in use, the floating guide structure inside the docking part starts to play a role, even if there is a small alignment deviation between the power distribution drawer and the docking part in the cabinet body, the floating guide structure can allow the docking part to adaptively float and fine-tune within a certain range, thereby guiding the docking part to contact the conductive terminal on the circuit breaker in a tilted or deflected manner, smoothly and gradually, achieving the purpose of buffered docking, which effectively avoids rigid collision and lateral stress, ensures the accuracy and stability of the conductive terminal docking, and at the same time, the guide slot provided on the side wall of the conversion base cooperates with the back of the docking part, providing precise horizontal and vertical guidance for the reciprocating movement of the docking part, preventing it from twisting or jamming during movement, and ensuring smooth transmission and docking process. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only a part of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 Structure schematic diagram of the open state of the present application; Figure 2 Structure schematic diagram of the closed state of the present application; Figure 3 Explosion schematic diagram of the power distribution drawer in the present application; Figure 4 Assembly schematic diagram of part of the structure and the transmission assembly in the present application; Figure 5 Structure schematic diagram of the mounting bracket in the present application; Figure 6 Assembly schematic diagram of the docking part and the elastic conductive unit in the present application; Figure 7 Internal structure schematic diagram of the docking part in the present application.

[0018] Marked in the figure: 1, cabinet; 2, power distribution drawer; 3, control frame; 4, conversion base; 5, circuit breaker; 6, conductive wire unit; 7, slide; 8, docking part; 9, conductive terminal; 10, guide slot; 11, spherical universal joint; 12, spring group; 13, elastic conductive unit; 14, guide socket; 15, mounting bracket; 16, rotating shaft; 17, gear one; 18, gear two; 19, magnetic suction head; 20, hand wheel; 21, rack three; 22, rotating disc; 23, chuck; 24, module locking plate; 25, heat dissipation air duct; 26, rack one; 27, rack two. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] In a first aspect, the present invention provides a modular power distribution cabinet, such as Figures 1-7 As shown, the system includes a cabinet 1 and a power distribution drawer 2. The power distribution drawer 2 consists of a control frame 3 and a conversion base 4. A circuit breaker 5 is installed on the conversion base 4. The circuit breaker 5 is connected to the cabinet 1 via a conductive cable unit 6. The power distribution drawer 2 is modularly configured with multiple sets, and each set of power distribution drawers 2 can be pulled out and installed inside the cabinet 1 via slide rails 7. The power distribution cabinet also includes: The docking part 8 is provided in the conversion base 4. The docking part 8 is provided with a floating guide structure to buffer the docking part 8 and the conductive terminal 9 on the circuit breaker 5 during the sliding of the power distribution drawer 2. A guide slot 10 is provided on the side wall of the conversion base 4, and the guide slot 10 mates with the back of the docking part 8 in the horizontal direction; Transmission components used to drive the reciprocating motion of docking section 8.

[0022] In this embodiment, when the power distribution drawer 2 is pushed into the cabinet 1 for power-on, the operator pushes the power distribution drawer 2 along the slide 7, and when the power distribution drawer 2 approaches the closed position, the transmission assembly starts to work to drive the docking portion 8 to move towards the circuit breaker 5. During the movement of the docking portion 8, the floating guide structure inside the docking portion 8 starts to work, that is, even if there is a slight alignment deviation between the power distribution drawer 2 and the docking portion 8 in the cabinet 1, the floating guide structure can allow the docking portion 8 to adaptively float and fine-tune within a certain range, so as to guide the docking portion 8 to smoothly and gradually contact the conductive terminal on the circuit breaker 5 in a tilted or deflected manner, so as to achieve the purpose of buffered docking. This process effectively avoids rigid collision and lateral stress, and ensures the accuracy and stability of the conductive terminal docking.

[0023] At the same time, the guide slot 10 provided on the side wall of the conversion base 4 cooperates with the back of the docking portion 8 to provide accurate horizontal and longitudinal guidance for the reciprocating movement of the docking portion 8, prevent it from twisting or jamming during movement, and ensure smooth transmission and docking process.

[0024] When the power distribution drawer 2 needs to be pulled out for maintenance or replacement, the transmission assembly is reversely driven to smoothly separate the docking portion 8 from the conductive terminal and disconnect the electrical connection. Then, the entire power distribution drawer 2 can be easily pulled out from the slide 7. Since the power distribution drawer 2 itself adopts a modular design composed of the control frame 3 and the conversion base 4, if only the circuit breaker 5 is damaged, it can be replaced on the conversion base 4 alone; if the control unit needs to be upgraded, the control frame 3 can be replaced. This modular design greatly simplifies the maintenance process.

[0025] In this embodiment, as shown in Figure 7 the floating guide structure includes a spherical universal joint 11 provided in the docking portion 8 and a spring set 12 arranged around the conductive terminal 9. The spring set 12 provides radial and axial buffer compensation. The docking portion 8 is installed through the spherical universal joint 11, so as to have the ability of multidirectional fine-tuning.

[0026] In this embodiment, as shown in Figure 6 , Figure 7As shown, the elastic conductive unit 13 is arranged on the docking part 8, the conductive terminal 9 on the circuit breaker 5 is arranged as a plane static contact, and the elastic conductive unit 13 forms a vertical pressure joint with the plane static contact during docking. The spring set 12 surrounding the conductive terminal 9 can simultaneously provide axial and radial buffer compensation when the docking part 8 contacts the plane static contact of the circuit breaker 5, which means that even if there is a deviation in the alignment, the docking part 8 can adaptively fine-tune the angle and position under the elasticity of the spring set 12 and the freedom of the spherical universal joint 11, realize "soft docking", avoid rigid impact, and this surface contact mode, under the continuous pressure provided by the spring set 12, has small contact resistance, large contact area, reliable connection, and effectively avoids the ablation problem that may be caused by point contact or line contact.

[0027] In the embodiment, as shown in Figure 3 , Figure 4 , the guide slot 10 is arranged on the side wall of the conversion base 4, and the guide slot 10 arranged on the side wall of the conversion base 4 has a plurality of guide holes 14 with gradually changing specifications, which provides multi-stage and accurate guidance for the movement of the docking part 8, prevents jamming, and further improves the assembly adaptability of the entire power distribution cabinet because the guide slot 10 itself is adjustable.

[0028] In the embodiment, as shown in Figure 3 , Figure 4 , the transmission assembly comprises: a mounting frame 15 arranged in the conversion base 4; a rotating shaft 16 arranged on the mounting frame 15, and gear one 17 and gear two 18 are arranged on both sides of the rotating shaft 16; gear rack one 26 and gear rack two 27 arranged on the mounting frame 15, and the gear rack one 26 and the gear rack two 27 are respectively engaged on both sides of the gear one 17; a magnetic suction head 19 arranged at the end of the gear rack one 26; a hand wheel 20 arranged on the power distribution drawer 2 and capable of being pushed and pulled, and the end of the magnetic suction head 19 is connected with the hand wheel 20; a gear rack three 21 arranged on the mounting frame 15 and perpendicular to the movement track of the gear rack one 26, and the docking part 8 is fixedly connected with the gear rack three 21; Specifically, the magnetic suction head 19 is moved by the hand wheel 20, and then the gear one 17 engaged with the gear rack one 26 is driven to rotate, the rotation of the gear one 17 drives the gear two 18 to synchronously rotate through the rotating shaft 16, and then the gear rack three 21 and the gear rack two 27 are driven to move, respectively, the movement path is positioned through the gear rack two 27, and the docking part 8 is driven to reciprocate through the gear rack three 21.

[0029] In the embodiment, as shown in Figure 4As shown, the movement trajectories of the rack one 26 and the rack two 27 remain parallel, two hand wheels 20 are arranged on one power distribution drawer 2, the hand wheel 20 is provided with a rotating disc 22, and the magnetic suction head 19 is arranged in a limiting sliding mode on the rotating disc 22.

[0030] In the embodiment, as shown in the figure, Figure 3 The control box 3 is provided with a clamping head 23 at the port, and the independent module locking plate 24 is clamped on the clamping head 23.

[0031] In the embodiment, when any one power distribution drawer 2 is in the extracted state, the adjacent live power distribution drawer 2 is not affected.

[0032] In the embodiment, as shown in the figure, Figure 1 , Figure 2 The top and bottom of the cabinet 1 are integrated with independent heat dissipation air ducts 25, the heat dissipation paths of the heat dissipation air ducts 25 extend to the several groups of power distribution drawers 2, the independent heat dissipation air ducts 25 integrated on the top and bottom of the cabinet 1 can forcibly deliver cold air to each power distribution drawer 2, form an effective heat dissipation path, and ensure the stability of the equipment under long-time high-load operation.

[0033] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of the present application includes the claims limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as above. In order to be brief, they are not provided in details.

[0034] The present application is intended to cover all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations, omissions, and equivalents should be included within the scope of the present application.

Claims

1. A modular power distribution cabinet, comprising a cabinet body (1) and a power distribution drawer (2), the power distribution drawer (2) is composed of a control frame (3) and a conversion base (4), the conversion base (4) is provided with a circuit breaker (5), the circuit breaker (5) is connected with the cabinet body (1) through a conductive wire harness unit (6), characterized in that, The power distribution drawer (2) is modularly configured in multiple groups. All groups of the power distribution drawer (2) can be pulled out and installed inside the cabinet (1) via slide rails (7). The power distribution cabinet also includes: A docking part (8) is provided in the conversion base (4), and a floating guide structure is provided in the docking part (8) to buffer the docking part (8) and the conductive terminal (9) on the circuit breaker (5) during the sliding process of the power distribution drawer (2); A guide slot (10) is provided on the side wall of the conversion base (4), and the guide slot (10) mates with the back of the docking part (8) in the horizontal direction; Transmission components used to drive the reciprocating motion of the docking part (8).

2. The modular power distribution cabinet of claim 1, wherein, The floating guide structure includes a spherical universal joint (11) disposed within the docking portion (8) and a spring assembly (12) surrounding the conductive terminal (9), the spring assembly (12) providing radial and axial cushioning compensation.

3. A modular power distribution cabinet according to claim 2, characterized in that, The docking part (8) is provided with an elastic conductive unit (13), and the conductive terminal (9) on the circuit breaker (5) is set as a planar static contact. When docking, the elastic conductive unit (13) and the planar static contact form a vertical press.

4. A modular power distribution cabinet according to claim 1, characterized in that, The guide slot (10) is provided with a plurality of guide holes (14), the specifications of the plurality of guide holes (14) are gradually changing, and the guide slot (10) is adjustablely located on the side wall of the conversion base (4).

5. A modular power distribution cabinet according to claim 1, characterized in that, The transmission assembly includes: Mounting bracket (15) provided in the conversion base (4); Rotate the shaft (16) provided on the mounting bracket (15), and the shaft (16) is provided with gear one (17) and gear two (18) on both sides respectively. Rack 1 (26) and rack 2 (27) are slidably mounted on the mounting bracket (15), and rack 1 (26) and rack 2 (27) respectively mesh with the two sides of gear 1 (17); A magnetic suction head (19) is provided at the end of the rack (26). A push-pull handwheel (20) is provided on the power distribution drawer (2), and the end of the magnetic head (19) is connected to the handwheel (20); The rack three (21) is slidably mounted on the mounting bracket (15), and the movement trajectory of the rack three (21) is perpendicular to that of the rack one (26). The docking part (8) is fixedly connected to the rack three (21).

6. A modular power distribution cabinet according to claim 5, characterized in that, The motion trajectories of rack one (26) and rack two (27) remain parallel.

7. A modular power distribution cabinet according to claim 5, characterized in that, Two handwheels (20) are provided on one of the power distribution drawers (2), and a turntable (22) is provided on the handwheels (20). The magnetic suction head (19) is limited and slidably disposed on the turntable (22).

8. A modular power distribution cabinet according to claim 1, characterized in that, The control frame (3) has a locking head (23) at its port, and an independent module locking plate (24) is attached to the locking head (23).

9. A modular power distribution cabinet according to claim 8, characterized in that, When any one of the power distribution drawers (2) is in the withdrawn state, the adjacent live power distribution drawers (2) are not affected.

10. A modular power distribution cabinet according to claim 1, characterized in that, The top and bottom of the cabinet (1) are each integrated with an independent heat dissipation duct (25), and the heat dissipation path of the heat dissipation duct (25) extends to several sets of the power distribution drawers (2).

Images