Protection structure of low-voltage wire inlet cabinet and low-voltage cabinet

Abstract

The utility model belongs to the field of low-voltage power distribution equipment, and particularly provides a protection structure of a low-voltage wire inlet cabinet and a low-voltage cabinet, the protection structure is installed between a rear cabinet door and a main busbar, the protection structure comprises a blocking door arranged on the inner side wall of the low-voltage cabinet, and the blocking door is rotatably arranged on the inner side wall of the low-voltage cabinet; according to the utility model, the protection structure is additionally arranged between the rear cabinet door of the low-voltage cabinet and the main busbar, so that the main busbar is prevented from being greatly and directly exposed, one-level protection is provided for the main busbar, and the main busbar is prevented from being damaged or causing danger when other parts and devices are overhauled.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage power distribution equipment, specifically providing a protective structure for a low-voltage incoming cabinet and a low-voltage cabinet. Background Technology

[0002] A low-voltage incoming line cabinet is an electrical cabinet installed in a low-voltage distribution room to connect external power sources (such as those from the power grid or transformer) to the internal low-voltage distribution system. Power from the outside enters the incoming line cabinet through the main busbar, which connects to circuit breakers and current transformers, ultimately outputting to the busbars in the outgoing line cabinet. In existing technology, main busbars are made of conductive materials such as copper and aluminum, painted with color indicating phase sequence, and generally do not undergo insulation treatment or only simple surface insulation. Furthermore, the main busbar has a long path within the incoming line cabinet to accommodate circuit breakers, current transformers, and other devices. Therefore, a large number of main busbars are directly exposed within the cabinet. When the cabinet door is opened, these main busbars are directly visible. During cabinet opening operations, such as maintenance of other devices within the incoming line cabinet, the main busbars are easily damaged, posing a safety hazard. Therefore, there is an urgent need for a low-voltage incoming line cabinet that can protect the main busbars within the cabinet. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides a protective structure for a low-voltage incoming line cabinet and a low-voltage cabinet, further protecting the main busbar within the cabinet.

[0004] The technical solution of this utility model is as follows:

[0005] A protective structure for a low-voltage incoming switchgear is installed between the rear cabinet door and the main busbar, including a stop door disposed on the inner side wall of the low-voltage switchgear, the stop door being rotatably disposed on the inner side wall of the low-voltage switchgear.

[0006] In this solution, an additional barrier door is installed between the rear cabinet door and the main busbar. After the rear cabinet door is opened, there is another barrier door to shield the main busbar, preventing it from being directly exposed in large quantities. This provides an extra layer of protection for the main busbar, preventing damage or danger to the main busbar when repairing other components and devices. At the same time, the barrier door is designed to be movable, so it can be actively moved away when the main busbar is being repaired, without the need for additional disassembly using tools, making the barrier door more efficient and convenient to use.

[0007] On the one hand, the space inside the low-voltage cabinet is limited, and a simply set movable door is easy to interfere with other devices and structures inside the cabinet. Therefore, it is preferable to also include a horizontal slide rail, which is fixedly set on the inner side wall of the low-voltage cabinet, and one end of the door is slidably set on one or more horizontal slide rails. The door includes open and closed positions.

[0008] Preferably, when the door is in the open position, the door is parallel to the length direction of the horizontal slide rail, and the connection point between the door and the horizontal slide rail is at one end of the horizontal slide rail near the main busbar. When the door is in the closed position, the door is perpendicular to the length direction of the horizontal slide rail, and the connection point between the door and the horizontal slide rail is at one end of the horizontal slide rail near the rear cabinet door.

[0009] In this design, the barrier door differs from a conventional rotating door. When the barrier door is in the open position, it can be neatly placed against the inner wall of the low-voltage cabinet without being exposed outside the cabinet or occupying too much space inside. Furthermore, when switching between the open and closed positions, the rotation and sliding of the barrier door can occur simultaneously, ensuring that the barrier door does not occupy too much space inside the cabinet during movement, nor does it protrude from the cabinet body. This guarantees that the protective structure can be applied to low-voltage cabinets placed in confined spaces.

[0010] On the other hand, since the door is mounted on the inner wall of the low-voltage switchgear, an excessively large turning angle could cause the door to collide with the main busbar. Therefore, preferably, a vertical bending plate is provided at the connection between the door and the horizontal slide rail, making the door "L"-shaped. This vertical bending plate limits the door's rotation angle. When the vertical bending plate is parallel to the inner wall of the low-voltage switchgear, the door body is perpendicular to the inner wall, thus blocking the main busbar. Furthermore, due to the restriction of the vertical bending plate, the door can only rotate a maximum of 90°, preventing excessive rotation and collision with the main busbar.

[0011] Preferably, the door and the horizontal slide rail are symmetrically arranged on the two inner side walls of the low-voltage switchgear. Symmetrical door arrangement reduces the size of a single door structure and decreases the space occupancy rate when the door switches between two states.

[0012] Preferably, the horizontal slide rail includes a slide rail base, in which a slide groove and a sliding block are provided. A slide rod is provided along the length of the slide groove. The sliding block is slidably disposed in the slide groove via the slide rod. The stop door is rotatably connected to the sliding block. The stop door slides in the slide groove via the sliding block, and the guide of the slide rod makes the stop door more stable during movement.

[0013] Preferably, the slider base has a limiting groove at one end near the rear cabinet door, and a limiting bend is slidably inserted into the limiting groove. The stop door is provided with a U-shaped buckle that matches the limiting groove. When the stop door is in the open position, the U-shaped buckle is inserted into the limiting groove and locked by the limiting bend. When the stop door is open, it is placed against the inner wall of the low-voltage cabinet for storage. The U-shaped buckle is inserted into the limiting groove, and the limiting bend is inserted into the U-shaped buckle, restricting the movement of the U-shaped buckle and thus locking the position of the stop door, so that the stop door can remain in the open position.

[0014] Preferably, an elastic member is provided between the sliding block and the sliding groove, and the elastic member provides a force to the sliding block to slide towards the rear cabinet door.

[0015] In this scheme, a force is applied to the sliding block by an elastic component, so that the sliding block is always at the end of the slide groove near the rear cabinet door when it is not subjected to external forces other than gravity, so that the door can be kept in the closed position and ensure that the door does not interfere with the main busbar and other equipment and structures when it is in the closed position.

[0016] Preferably, the U-shaped buckle is equipped with a magnetic attraction unit. When the door is in the closed position, the U-shaped buckles on the two symmetrical doors attract and limit each other. A force-applying handle is provided at the end of the door closest to the U-shaped buckle, facilitating manual switching of the cabinet door's state by the operator. The symmetrically arranged doors attract each other through the magnetic attraction unit on the U-shaped buckle, restricting the rotation of the doors and keeping them in the closed position.

[0017] A low-voltage switchgear, comprising the protective structure of any of the above-mentioned preferred low-voltage incoming switchgear, and a switchgear frame, a rear door, and a main busbar.

[0018] In this solution, a protective structure is installed in the low-voltage cabinet to shield the main busbar, preventing it from being directly exposed in large quantities. This provides an extra level of protection for the main busbar, preventing damage or danger to the main busbar when other components are being repaired.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides an additional protective structure between the rear door of the low-voltage switchgear and the main busbar. This means that after the rear door is opened, an additional barrier door shields the main busbar, preventing extensive direct exposure and providing an extra layer of protection. This prevents damage or danger to the main busbar during maintenance of other components. Furthermore, the barrier door does not occupy excessive space in the low-voltage switchgear, does not interfere with other devices or systems, and can be actively removed during maintenance of the main busbar without the need for additional tool disassembly, making the barrier door more efficient and convenient to use. Attached Figure Description

[0021] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the protective structure of this utility model;

[0023] Figure 2This is a front view of the protective structure of this utility model in the closed position;

[0024] Figure 3 This is a front view of the opening position of the protective structure of this utility model;

[0025] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle;

[0026] Figure 5 This is a cross-sectional view of the low-voltage switchgear of this utility model.

[0027] In the above figures, the corresponding reference numerals are as follows:

[0028] 1-Rear cabinet door, 2-Main busbar, 3-Block door, 31-Vertical curved plate, 32-U-shaped buckle, 33-Magnetic suction unit, 34-Force application handle, 4-Horizontal slide rail, 41-Slide rail base, 42-Slide groove, 43-Sliding block, 44-Slide rod, 45-Elastic component, 46-Limiting groove, 47-Limiting curved column, 48-Low pad, 49-High pad, 5-Main frame, 6-Current transformer, 7-Frame circuit breaker, 8-SMC sealing plate. Detailed Implementation

[0029] The technical solution of the present invention will be clearly and completely described in conjunction with the accompanying drawings and through specific implementation methods of the embodiments of the present invention.

[0030] Example 1:

[0031] like Figure 1 The protective structure of a low-voltage incoming line cabinet shown is installed between the rear cabinet door 1 and the main busbar 2. It includes a door 3 disposed on the inner wall of the low-voltage cabinet, the door 3 being rotatably mounted on the inner wall. Specifically, the door 3 is mounted on a horizontal slide rail 4, which is fixedly mounted on the inner wall of the low-voltage cabinet. Preferably, one end of a single door 3 is slidably mounted on one or two horizontal slide rails 4. Furthermore, depending on the actual arrangement of the middle busbar of the low-voltage cabinet, the main busbar 2 is completely obscured, and one or more protective structures are provided. In this embodiment, two protective structures are preferably provided.

[0032] Specifically, the barrier 3 is preferably made of polycarbonate insulation board, such as Figures 1 to 4 As shown, the horizontal slide rail 4 includes a slide rail base 41, in which a slide groove 42 and a sliding block 43 are provided. A slide rod 44 is provided along the length of the slide groove 42. The sliding block 43 is slidably disposed in the slide groove 42 via the slide rod 44. The stop gate 3 is rotatably connected to the sliding block 43. The stop gate 3 slides in the slide groove 42 via the sliding block 43, and the guide of the slide rod 44 makes the stop gate 3 more stable when moving. A force-applying handle 34 is provided at the end of the stop gate 3 away from the connection between the stop gate 3 and the sliding block 43.

[0033] The operator controls the movement of the door stop 3 by gripping the force application handle 34, allowing the door stop 3 to be in the open or closed position. In this embodiment, the initial position of the door stop 3 is the closed position. When the door stop 3 is in the open position, such as... Figure 3 As shown, the blocking door 3 is parallel to the horizontal slide rail 4 in the length direction. The connection between the blocking door 3 and the horizontal slide rail 4 is located at one end of the horizontal slide rail 4 near the main busbar 2, and the force application handle 34 is exactly located in the groove between the two horizontal slide rails 4.

[0034] When switching states, the operator pulls the force-applying handle 34 to pull and extend the stop door 3 directly along the length of the horizontal slide rail 4, allowing the sliding block 43 to slide from the end near the main busbar 2 to the end of the slide groove 42 near the rear cabinet door 1. At this time, the stop door 3 is still parallel to the length of the horizontal slide rail 4. Then, the operator rotates the stop door 3 using the force-applying handle 34, making the stop door 3 perpendicular to the length of the horizontal slide rail 4, so that the stop door 3 blocks the main busbar 2. When there is not enough space outside the cabinet at the rear cabinet door 1 of the low-voltage cabinet for the stop door 3 to be fully extended, the operator can apply force to the stop door 3 using the force-applying handle 34, so that the extension and rotation of the stop door 3 are performed simultaneously. After the above actions are completed, the stop door 3 is perpendicular to the length of the horizontal slide rail 4, and the connection point between the stop door 3 and the horizontal slide rail 4 is at the end of the horizontal slide rail 4 near the rear cabinet door 1. At this time, the stop door 3 is as follows: Figure 2 As shown, it is in the closed position.

[0035] It should be noted that, in order to prevent the door stop 3 from rotating too much and colliding with the main busbar 2, a vertical bending plate 31 is provided at the connection between the door stop 3 and the horizontal slide rail 4, making the door stop 3 "L"-shaped. The vertical bending plate 31 is used to limit the rotation angle of the door stop 3. When the vertical bending plate 31 is parallel to the inner wall of the low-voltage cabinet, the main body of the door stop 3 can be perpendicular to the inner wall of the low-voltage cabinet, thus blocking the main busbar 2. Due to the restriction of the vertical bending plate 31, the door stop 3 can only rotate a maximum of 90°.

[0036] Example 2:

[0037] To ensure that the door stop 3 can maintain a certain degree of stability in both open and closed states, such as Figure 1 and Figure 4As shown, a limiting groove 46 is provided at one end of the slider base near the rear cabinet door 1. A limiting bend 47 is slidably inserted into the limiting groove 46. The stop door 3 is provided with a U-shaped buckle 32 that matches the limiting groove 46. When the stop door 3 is in the open position, the U-shaped buckle 32 is inserted into the limiting groove 46, and the limiting bend 47 can lock the U-shaped buckle 32 in the limiting groove 46 from the U-shaped groove into which it is inserted. Preferably, the opening of the U-shaped buckle 32 is set upward, so that the limiting bend 47 on the slider base can be inserted downward into the U-shaped groove of the U-shaped buckle 32 by its own weight, while restricting the sliding of the slider block 43 and the rotation of the stop door 3.

[0038] Furthermore, when the bent portion of the limiting bend 47 is inserted into the U-shaped buckle 32, it is placed on the low pad 48. When it is necessary to release the lock of the U-shaped buckle 32, the limiting bend 47 is lifted upward and the limiting bend is rotated so that the bent portion is placed on the high pad 49.

[0039] When the door stop 3 is in the closed position, the movement of the sliding block 43 and the rotation of the door stop 3 must also be restricted. To this end, an elastic member 45 is provided between the sliding block 43 and the slide groove 42. The elastic member 45 applies a force to the sliding block 43 towards the rear cabinet door 1. By applying force to the sliding block 43 through the elastic member 45, the sliding block 43 remains at the end of the slide groove 42 closest to the rear cabinet door 1, unless subjected to external forces other than gravity. Preferably, a pull rope spring is provided on the side of the sliding block 43 and the slide groove 42 closest to the rear cabinet door 1. For the rotation of the door stop 3, a magnetic attraction unit 33 is provided on the U-shaped buckle 32 on the door stop 3, and a corresponding magnetic attraction unit 33 is provided on the side wall of the other side of the low-voltage cabinet. The two magnetic attraction units 33 attract each other, so that rotating the door stop 3 requires overcoming the attractive force of the magnetic attraction units 33.

[0040] Example 3:

[0041] The door 3 and the horizontal slide rail 4 are symmetrically arranged on the two inner side walls of the low-voltage cabinet. The symmetrical arrangement of the door 3 can reduce the size of a single door structure and reduce the space occupancy of the door 3 when switching between two states.

[0042] Furthermore, the magnetic units 33 on the U-shaped buckles 32 on the two symmetrical door stops 3 attract and limit each other, restricting the rotation of the door stops 3 and keeping the door stops 3 in the closed position.

[0043] Furthermore, when the gate 3 is in the closed position, the symmetrically arranged gates 3 are on the same plane. At this time, the rotation of the gate 3 can be restricted by setting a limiting rod in the U-shaped buckle 32 on the two gates 3.

[0044] Example 4:

[0045] like Figure 5As shown, a low-voltage switchgear based on the above embodiment also includes a main frame 5, a rear door 1, a main busbar 2, and an SMC sealing plate 8. The main busbar 2 in the low-voltage switchgear passes through a current transformer 6 and a frame circuit breaker 7 in sequence, and is also equipped with a grounding busbar. The door 3 is only set at the main busbar 2 and the grounding busbar to protect the busbars without obstructing the current transformer 6 and the frame circuit breaker 7. The entrance of the main busbar 2 on the switchgear wall is sealed with the SMC sealing plate 8.

[0046] Specifically, by setting up a protective structure in the low-voltage cabinet to shield the main busbar 2, the main busbar 2 is prevented from being directly exposed in large quantities, providing an additional level of protection for the main busbar 2 and preventing damage to the main busbar 2 or causing danger when repairing other components and devices.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A protective structure for a low-voltage incoming line cabinet, characterized in that: Installed between the rear cabinet door (1) and the main busbar (2), including a stop door (3) set on the inner side wall of the low-voltage cabinet, the stop door (3) being rotatably set on the inner side wall of the low-voltage cabinet.

2. The protective structure of a low-voltage incoming line cabinet according to claim 1, characterized in that: It also includes a horizontal slide rail (4), which is fixedly installed on the inner side wall of the low-voltage cabinet. One end of the door (3) is slidably installed on one or more horizontal slide rails (4), and the door (3) includes open and closed positions.

3. The protective structure of a low-voltage incoming line cabinet according to claim 2, characterized in that: When the door (3) is in the open position, the door (3) is parallel to the length direction of the horizontal slide rail (4), and the connection point between the door (3) and the horizontal slide rail (4) is at one end of the horizontal slide rail (4) near the main busbar (2). When the door (3) is in the closed position, the door (3) is perpendicular to the length direction of the horizontal slide rail (4), and the connection point between the door (3) and the horizontal slide rail (4) is at one end of the horizontal slide rail (4) near the rear cabinet door (1).

4. The protective structure of a low-voltage incoming line cabinet according to claim 3, characterized in that: A vertical bending plate (31) is provided at the connection between the gate (3) and the horizontal slide rail (4) to make the gate (3) "L" shaped. The vertical bending plate (31) is used to limit the rotation angle of the gate (3).

5. The protective structure of a low-voltage incoming line cabinet according to any one of claims 4, characterized in that: The door (3) and the horizontal slide rail (4) are symmetrically arranged on the two inner side walls of the low-voltage cabinet.

6. The protective structure of a low-voltage incoming line cabinet according to claim 5, characterized in that: The horizontal slide rail (4) includes a slide rail base (41), in which a slide groove (42) and a sliding block (43) are provided. A slide rod (44) is provided along the length of the slide groove (42). The sliding block (43) is slidably disposed in the slide groove (42) through the slide rod (44). The stop gate (3) is rotatably connected to the sliding block (43).

7. The protective structure of a low-voltage incoming line cabinet according to claim 6, characterized in that: The slider base (41) is provided with a limiting groove (46) at one end near the rear cabinet door (1). A limiting bend (47) is slidably inserted into the limiting groove (46). The stop door (3) is provided with a U-shaped buckle (32) that matches the limiting groove (46). When the stop door (3) is in the open position, the U-shaped buckle (32) is inserted into the limiting groove (46) and locked by the limiting bend (47).

8. The protective structure of a low-voltage incoming line cabinet according to claim 7, characterized in that: An elastic member (45) is provided between the sliding block (43) and the slide groove (42), and the elastic member (45) gives the sliding block (43) a force to slide towards the rear cabinet door (1).

9. The protective structure of a low-voltage incoming line cabinet according to claim 8, characterized in that: The U-shaped buckle (32) is provided with a magnetic attraction unit (33). When the door (3) is in the closed position, the U-shaped buckles (32) on the two symmetrical door (3) attract each other and limit the movement. The stop (3) is provided with a force-applying handle (34) at one end near the U-shaped buckle (32).

10. A low-voltage switchgear, characterized in that: The protective structure of the low-voltage incoming line cabinet as described in any one of claims 1 to 9 further includes a cabinet frame, a rear cabinet door (1), and a main busbar (2).

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