Low-voltage cabinet with movable base structure

Abstract

The utility model discloses a low-voltage cabinet with a movable base structure, which comprises a chassis and a cabinet body, the bottom of the cabinet body is provided with a universal wheel set, the chassis is provided with a roller slideway and a limiting slot, the cabinet body is provided with a limiting bolt matched with the limiting slot, the universal wheel set comprises a front row of wheels and a rear row of wheels, and the front row of wheels and the rear row of wheels are arranged in parallel. The lifting height of the lifting assembly is equal to the thickness from the bottom of a roller slide way of the chassis to the outer surface; according to the low-voltage cabinet structure provided by the utility model, the cabinet body can be kept in a stable placement state during installation and use through the arrangement of the detachable movable chassis, and the movable structure between the chassis and the cabinet body enables the cabinet body to flexibly move and rotate relative to the chassis after the limitation of an external connection cable is removed. The cabinet body is convenient to operate during overhaul and maintenance, a better operation space view for the cabinet body can be obtained through movement and rotation, and overhaul work of workers is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of power cabinet structure technology, specifically to a low-voltage cabinet with a movable base. Background Technology

[0002] Low-voltage switchgear is suitable for AC 50Hz systems with a rated operating voltage of 660V and below. This type of product has a compact design, strong structural versatility, flexible assembly, and adopts a standard modular design. It is a safe, economical, reasonable, and reliable new type of low-voltage withdrawable switchgear. The product features high breaking capacity, good dynamic and thermal stability, flexible electrical scheme, and high protection level.

[0003] Traditional switchgear is typically fixed in place and transported to its installation location using forklifts or other external transport vehicles. Due to space constraints and external cable connection requirements, low-voltage switchgear is usually placed against a wall. This means that internal maintenance can only be performed by opening and closing the door from the front, resulting in a limited field of vision. Mobile low-voltage switchgear with built-in movable structures is also available on the market. These switchgear generally use casters installed at the bottom of the switchgear casing for movement, and wheel brakes on the casters for securing them. However, prolonged use can lead to wear on the casters and wheel brakes, reducing friction and weakening the securing strength between them. This results in reduced stability of the switchgear during operation. Furthermore, the electrical equipment and cooling systems inside the switchgear experience vibrations, which can negatively impact the cabinet's usability. Utility Model Content

[0004] In view of the prior art, the purpose of this utility model is to provide a low-voltage cabinet with a movable base structure that can be moved and rotated when maintenance is required and remains stably placed during use.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a low-voltage cabinet with a movable base structure, including a chassis and a cabinet body, wherein a set of universal wheels is provided at the bottom of the cabinet body, a roller slide and a limiting slot are provided on the chassis, and a limiting pin matching the limiting slot is provided on the cabinet body. The set of universal wheels includes a front row of wheels and a rear row of wheels, wherein the front row of wheels is provided with a lifting component, and its lifting height is equal to the thickness of the bottom of the roller slide groove of the chassis from the outer surface.

[0006] As a further feature of the above solution, two sets of limiting pins and limiting slots are provided, and the limiting pins are pulled upward from inside the cabinet to release the insertion and engagement with the limiting slots. The limiting pins are also provided with limiting blocks to restrict their fall.

[0007] As a further feature of the above solution, the lifting assembly includes a threaded rod connected to the front wheels and a handwheel fixedly connected to the end of the threaded rod. The threaded rod is provided with an upper limit ring and a lower limit ring.

[0008] As a further feature of the above solution, the chassis is also provided with a carrying hole, and the side of the cabinet is provided with a threaded hole and a threaded bolt for threaded connection to the threaded hole after passing through the carrying hole.

[0009] As a further feature of the above solution, the limiting pin is cylindrical, the limiting slot is a cylindrical hole, and the front end of the limiting pin is a round head or a pointed head with rounded corners. The chassis is provided with a guide groove for the limiting pin.

[0010] As a further feature of the above solution, the cabinet is equipped with a front opening door and a rear inspection door.

[0011] Beneficial effects: The low-voltage cabinet structure of this embodiment, compared with the prior art, can keep the cabinet in a stable position during installation and use by setting a chassis. The movable structure between the chassis and the cabinet allows the cabinet to move and rotate flexibly after the restriction of external connection cables is removed, which facilitates operation during inspection and maintenance. The movement and rotation can obtain a better operating space and field of vision, which is convenient for the staff to carry out maintenance work. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the front structure of the low-voltage switchgear of this utility model.

[0013] Figure 2 This is a schematic diagram of the rear structure of the low-voltage switchgear of this utility model.

[0014] Figure 3 This is a schematic diagram of the chassis structure in this embodiment.

[0015] Figure 4 This is a schematic diagram showing the assembly state of the low-voltage switchgear and chassis structure in this embodiment.

[0016] Figure 5 This is a schematic diagram of the low-voltage cabinet in the pulled-out state in this embodiment.

[0017] Figure 6 This is a schematic diagram of the low-voltage switchgear in rotation state in this embodiment.

[0018] Reference numerals: 1. Chassis; 11. Roller slide; 12. Limiting slot; 13. Carrying hole; 17. Front opening door; 18. Rear inspection door; 2. Cabinet; 21. Caster wheel assembly; 211. Front row of wheels; 212. Rear row of wheels; 213. Lifting assembly; 214. Threaded rod; 215. Handwheel; 216. Upper limit ring; 217. Lower limit ring; 22. Limiting pin; 23. Threaded hole; 24. Limiting block; 28. Guide groove. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0020] like Figure 1-6 The low-voltage switchgear shown includes a chassis 1 and a cabinet 2. The bottom of the cabinet 2 is provided with a set of casters 21. The chassis 1 is provided with a roller slide 11 and a limiting slot 12. The cabinet 2 is provided with a limiting pin 22 that matches the limiting slot 12. The set of casters 21 includes a front row of wheels 211 and a rear row of wheels 212. The front row of wheels 211 is provided with a lifting component 213, and its lifting height is equal to the thickness of the bottom of the roller slide 11 groove of the chassis 1 from the outer surface. The purpose of this thickness design is that when the cabinet 2 is released from the moving state of the chassis 1, the lifting of the front row of wheels 211 and the rear row of wheels 212 can cooperate to support the horizontal position of the cabinet 2.

[0021] As a further provision of the above scheme, two sets of limiting pins 22 and limiting slots 12 are provided. The limiting pins 22 are pulled upward from inside the cabinet 2 to release the insertion and engagement with the limiting slots 12. The limiting pins 22 are also provided with limiting blocks 24 to restrict their fall. The function of the limiting blocks 24 is that when the corresponding limiting pins 22 are not used, the downward movement of the limiting pins 22 can be limited by pulling the T-shaped limiting pins 22 upward from the gap between the limiting blocks 24, rotating them circumferentially, rotating them to an angle that can form a limit, and then putting them down.

[0022] As a further provision of the above solution, the lifting assembly 213 includes a threaded rod 214 connected to the front row wheel 211 and a handwheel 215 fixedly connected to the end of the threaded rod 214. The threaded rod 214 is provided with an upper limit ring 216 and a lower limit ring 217. In this embodiment, the handwheel 215 can rotate the threaded rod 214 connected to the upper part of the front row wheel 211. The threaded rod 214 itself is threadedly engaged with the bottom of the cabinet 2. Under the drive of the handwheel 215, it rotates spirally relative to the cabinet 2, thereby realizing the lifting and lowering adjustment of the front row wheel 211 relative to the cabinet 2.

[0023] As a further provision of the above scheme, the chassis 1 is also provided with a carrying hole 13, and the side of the cabinet 2 is provided with a threaded hole 23 and a threaded bolt for threading through the carrying hole 13 and connecting to the threaded hole 23. The threaded bolt is not shown in the figure. The threaded bolt actually used in this embodiment is similar to an ordinary bolt, with a rod head with a slightly larger cap at one end and a thread at the other end. The rod head passes through the carrying hole 13 and is threaded into the threaded hole 23 on the side of the cabinet 2 to complete the threaded locking. When disassembling, the direction is operated, and after removing the chassis 1, the threaded bolt can be reconnected to the threaded hole 23 and placed.

[0024] As a further feature of the above solution, the limiting pin 22 is cylindrical, the limiting slot 12 is a cylindrical hole, and the front end of the limiting pin 22 is a round head or a pointed head with rounded corners. The chassis 1 is provided with a guide groove 28 for the limiting pin 22. The guide groove 28 is used to guide the limiting pin 22, and the guide groove 28 makes the front end of the limiting pin 22 have a height difference with the upper surface of the chassis 1, making it easier for it to fall into the limiting slot 12.

[0025] As a further feature of the above scheme, the cabinet 2 is provided with a front opening door 17 and a rear inspection door 18. The front opening door 17 is mainly used to inspect the front during normal use and maintenance, while the rear inspection door 18 is mainly used to pull out the low-voltage cabinet through the movable base and then open it during maintenance. The rear inspection door 18 is generally in a closed and unopened state.

[0026] The principle of the low-voltage cabinet in this embodiment: The low-voltage cabinet in this embodiment is equipped with a base with a movable structure, which can achieve stable placement and flexible transfer compared with the prior art. Unlike the prior art which is equipped with casters and brake casters, the low-voltage cabinet in this embodiment is equipped with a matching movable base. The movable base is fixed to the side of the cabinet 2 by threaded bolts, threaded holes 23 and carrying holes 13 when moving. When placed, it is placed on the chassis 1 on the ground at the installation position. It is worth noting that the chassis 1 in this embodiment is set as a hollow cavity structure. The staff can fill the inside with counterweight to increase its overall weight. When disassembling and moving, the internal counterweight can be emptied out to reduce the weight, which can facilitate hanging.

[0027] Further, the design of the chassis 1 and the bottom of the cabinet 2 in this embodiment includes two rows of caster wheels 21 at the bottom of the cabinet 2. The front row of wheels 211 has threaded rods 214, which can be raised and lowered by rotating the handwheel 215. When raised, the front row of wheels 211 and the rear row of wheels 212 are at the same horizontal height, and the cabinet 2 remains horizontal during movement. After moving to the destination position, the operator can loosen the threaded rods to remove the chassis 1 and fill the sealed cavity inside with a suitable common counterweight medium such as sand or water. Then, the cabinet 2 is moved to the front of the chassis 1. With the rear wheels 212 of cabinet 2 aligned with the roller slide 11 of chassis 1, and the rear wheels 212 moved onto the roller slide 11, the front wheels 211 are lowered by adjusting the threaded rod 214 using handwheel 215. At this point, the rear wheels 212 of cabinet 2 are on chassis 1, and the front wheels 211 are on the ground. Based on the lifting assembly 213, cabinet 2 remains horizontal after adjustment. Furthermore, in this state, the operator continues to push cabinet 2 until the protrusion of the limiting pin 22 on cabinet 2 aligns with the limiting slot 12. It is worth noting that the limiting pin 22 in this embodiment is provided with at least... The two rows of limiting pins 22 have the same structure and can be inserted into the limiting slots 12. When the chassis 1 is not installed, they can be stored inside the cabinet 2. The protruding openings of the limiting pins 22 can be sealed with sealing plugs as needed. In use, the row of limiting pins 22 closer to the front door 17 is mainly used to insert into the limiting slots 12 when the low-voltage cabinet is working normally, thereby limiting the horizontal position of the cabinet 2 relative to the chassis 1. This ensures that even though the bottom casters 21 of the cabinet 2 are in contact with the ground, the limiting pins 22 and the limiting slots 12 keep the cabinet 2 stable relative to the chassis 1. If the chassis 1 remains stationary, the cabinet 2 will remain in one place and will not move. The rear limit pin 22 is used to limit the end of the travel of the cabinet 2 after the front row is pulled out and the cabinet 2 is pushed horizontally forward. This serves two purposes: first, to prevent the rear wheels 212 from sliding down the chassis 1 too quickly and affecting the equipment; and second, to limit the movement of the low-voltage cabinet through the chassis 1. This movement distance is sufficient when the cabinet 2 is placed against the wall, but the rear access door 18 needs to be opened for maintenance. That is, after the rear limit pin 22 is inserted into the limit slot 12, the distance between the cabinet 2 and the wall is sufficient to open the rear access door 18.

[0028] Furthermore, when required by the staff, the movable base of the low-voltage cabinet in this embodiment can also rotate and swing based on the limiting pins 22. The principle is as follows: When the limiting pins 22 in the rear row are inserted into the limiting slots 12, the staff can pull out the entire row of limiting pins 22 as needed, leaving only one as a pivot (regardless of how many limiting pins 22 there are, only one should be pulled out as a pivot). The pivot is determined according to the actual space. If multiple limiting pins 22 are set, the one left after pulling out should be as close as possible to the two sides. This facilitates the expansion of space during rotation. By rotating, the cabinet 2 can be rotated relative to the chassis 1. It should be noted that in actual applications, at least three universal wheel sets 21 located at the three corners are sufficient to meet the support requirements. However, to prevent any unforeseen circumstances, lifting components 213 can also be set for the rear wheels 212, or pads can be used to support the rear wheels 212 in front of the roller slide 11, depending on the actual needs.

[0029] The low-voltage cabinet structure in this embodiment, compared with the prior art, allows the cabinet 2 to maintain a stable placement during installation and use by setting the chassis 1. The movable structure between the chassis 1 and the cabinet 2 allows the cabinet 2 to move and rotate flexibly after the restriction of external connection cables is removed, which facilitates operation during inspection and maintenance. The movement and rotation can obtain a better operating space and field of vision, which is convenient for the maintenance work of the staff.

[0030] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A low-voltage switchgear with a movable base structure, characterized in that: The system includes a chassis (1) and a cabinet (2). The bottom of the cabinet (2) is provided with a set of casters (21). The chassis (1) is provided with a roller slide (11) and a limiting slot (12). The cabinet (2) is provided with a limiting pin (22) that matches the limiting slot (12). The set of casters (21) includes a front row of wheels (211) and a rear row of wheels (212). The front row of wheels (211) is provided with a lifting component (213), and its lifting height is equal to the thickness of the bottom of the roller slide (11) groove of the chassis (1) from the outer surface.

2. A low-voltage switchgear with a movable base structure according to claim 1, characterized in that: The limiting pin (22) and the limiting slot (12) are provided in two sets. The limiting pin (22) is lifted up from inside the cabinet (2) to release the insertion and cooperation with the limiting slot (12). The limiting pin (22) is also provided with a limiting block (24) to limit its fall.

3. A low-voltage switchgear with a movable base structure according to claim 1, characterized in that: The lifting assembly (213) includes a threaded rod (214) connected to the front wheel (211) and a handwheel (215) fixedly connected to the end of the threaded rod (214). The threaded rod (214) is provided with an upper limit ring (216) and a lower limit ring (217).

4. A low-voltage switchgear with a movable base structure according to claim 1, characterized in that: The chassis (1) is also provided with a carrying hole (13), and the side of the cabinet (2) is provided with a threaded hole (23) and a threaded bolt for threaded connection to the threaded hole (23) after passing through the carrying hole (13).

5. A low-voltage switchgear with a movable base structure according to claim 1 or 2, characterized in that: The limiting pin (22) is cylindrical, the limiting slot (12) is a cylindrical hole, and the front end of the limiting pin (22) is a round head or a pointed head with rounded corners. The chassis (1) is provided with a guide groove (28) for the limiting pin (22).

6. A low-voltage switchgear with a movable base structure according to claim 1, characterized in that: The cabinet (2) is equipped with a front opening door (17) and a rear inspection door (18).

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