Low-voltage drawer type switch cabinet

Abstract

A low-voltage drawer type switch cabinet of the present invention comprises a cabinet body combination, the cabinet body combination is composed of a cabinet frame, a base and a side protection plate, the bottom of the cabinet frame is fixedly connected with the base through bolts, the left side of the cabinet body combination is provided with a plurality of drawer mechanisms, and each drawer mechanism is composed of a drawer door plate, a drawer lock body and a drawer body. The drawer body is slidably connected in the cabinet body combination; the surface of the drawer body is also provided with a plurality of groups of butt joint mechanisms used for protection. Each butt joint mechanism is composed of a switch joint, a male plug combination, a moving contact assembly and a separator plate. According to the invention, the drawer chamber which is separated independently is provided, the drawer mechanism is connected with the inlet wire busbar through a new-generation spherical interface, and the inlet wire busbar can adopt a laminated busbar according to actual requirements to improve the current-carrying performance and the temperature rise performance. The spherical interface assembly is installed in the integrated male socket / moving contact seat and has an automatic valve design, and the valve is in a normally-closed state when a drawer is installed, so that electric shock prevention and dust prevention effects are achieved.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, specifically a low-voltage drawer-type switchgear. Background Technology

[0002] Switchgear, also known as wiring cabinet, can be used to distribute incoming high-voltage or low-voltage power lines to various terminals. Low-voltage switchgear is suitable for power distribution and energy conversion, distribution and control of motors and capacitors in low-voltage power distribution systems such as power plants, substations, petrochemical industries, factories and mines, and high-rise buildings.

[0003] Currently, the low-voltage switchgear used in the market is GGD (fixed type) and GCK (drawer type). The traditional GCK drawer and cabinet use a bridge-type contact plate for conductive connection between the moving and stationary contacts. Since the spring of the bridge-type contact plate is a sheet spring, the spring force will weaken or even fail after being subjected to high temperature. In addition, the structure of the bridge-type contact plate is a single set of two-point contact, which can easily cause one-sided contact when encountering vibration, resulting in an increase in instantaneous current and a sharp rise in temperature, leading to contact burnout and thus causing an accident. Summary of the Invention

[0004] The purpose of this invention is to provide a low-voltage drawer-type switchgear that can structurally improve the stability of the connection between the drawer and the busbar, improve its temperature rise performance and current carrying capacity, and has good seismic resistance, so as to be suitable for use in scenarios with large vibrations or in key projects that need to resist possible vibrations.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-voltage drawer-type switch cabinet, comprising a cabinet assembly, which is composed of a cabinet frame, a base, and side panels. The bottom of the cabinet frame is fixedly connected to the base by bolts. Several drawer mechanisms are provided on the left side of the cabinet assembly, and each drawer mechanism is composed of a drawer door panel, a drawer lock body, and a drawer body. The drawer body is slidably connected inside the cabinet assembly. Several sets of protective connector mechanisms are also provided on the surface of the drawer body. Each connector mechanism is composed of a cable outlet, a male connector assembly, a female connector assembly, and a partition. The female connector assembly is fixedly connected to the surface of the drawer body, and a male connector assembly is inserted into the end of the female connector assembly. One end of the male connector assembly is fixed to the cabinet frame, and the other end of the male connector assembly is fitted with a cable outlet, which facilitates the protection of the cable outlet from bending. Three sets of partitions are also inserted into the surface of the male connector assembly, which are used to separate the various cables.

[0006] Preferably, the left side of the cabinet assembly is fixedly connected with a side guard plate by screws, and the side guard plate is used for the protection of the entire cabinet. The cabinet assembly is also provided with a placement frame for storage.

[0007] Preferably, a drawer door panel is hinged to the surface of the cabinet assembly and located on one side of the drawer body, and a drawer lock body is rotatably connected to the surface of the drawer door panel, and the drawer lock body is used for opening and closing the drawer door panel.

[0008] Preferably, the male socket assembly consists of a male socket, a male socket housing, a self-closing part, and a ball head, and the male socket is fixedly connected to the surface of the drawer body by four bolts.

[0009] Preferably, the surface of the male socket is provided with four sets of through male main shells, and the upper end of the male socket is fitted with a self-closing part, which is used to prevent electric shock and to prevent dust.

[0010] Preferably, the self-closing part is composed of a collar, a hinge post, and a fan-shaped louver, with the collar fitted onto the top of the male connector housing.

[0011] Preferably, the inner wall of the collar is provided with several sets of hinge posts along the circumference, and the several sets of hinge posts together form a complete circle; each hinge post is hinged with a fan-shaped louver, and multiple fan-shaped louvers are fixedly connected to the surface of the collar by a spring, and the fan-shaped louvers can automatically close when the male and female plugs are not engaged.

[0012] Preferably, the female socket assembly includes a female socket, a female socket main shell, and an annular groove. The female socket is fixedly connected to the surface of the cabinet frame, and the surface of the female socket is provided with a through female socket main shell, and the female socket main shell and the male socket main shell are interlocked.

[0013] Preferably, the end of the female plug main shell is provided with an annular groove, and the surface of the annular groove is fitted with an insulating sleeve. Several sets of locking plates are fixed circumferentially inside the female plug main shell, and the locking plates are surrounded by a spring to form a plum blossom shape.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The low-voltage switchgear is equipped with a connector mechanism. In implementation, multiple connector mechanisms are installed on the cabinet. The connector part is uniquely designed, with a male plug assembly and a moving contact assembly. The male plug assembly is designed with an automatically closing louver, divided into multiple fan shapes. The multiple fan shapes are connected by a spring on the inside. When the plug is pulled out, the louver can automatically close to prevent electric shock and provide dust protection. At the same time, the moving contact assembly is designed with a clover-shaped ball head. Multiple contacts are surrounded by a spring to form a clover shape, and the inside is spherical. This can tightly wrap the spherical connector, making the connection tighter and preventing single-point contact, which could cause local overheating and short circuit.

[0015] Therefore, this low-voltage switchgear has changed the traditional conductive connection mode of bridge-type clip moving and stationary contacts between the GCK drawer and the cabinet. It uses a new ball-shaped plum blossom moving and stationary contact connection. The stability and reliability of this connection method have made a qualitative leap. The ball surrounds and clamps tightly in a 360-degree manner, which has very good heat dissipation performance. Its current can reach up to 1000A, and it has very good shock resistance. After the moving and stationary contacts are connected in place, there is a movable conical space with a degree of freedom and it can operate under load and shake. In principle, it overcomes the fixed failure or deformation that may be caused by hard connection when encountering severe vibration in the operating environment, which may cause the moving and stationary contact connection point to separate, resulting in instantaneous high temperature and burnout of the contact and causing accidents.

[0016] The new structural design of this low-voltage switchgear features independent and enclosed drawer compartments that are completely isolated from the busbar compartments, providing excellent protection against cross-contamination of dust during use and preventing small animals from entering. The vertical busbars of this low-voltage switchgear are all located in the top busbar compartment, and the branch incoming busbars can be flexibly selected as single or multi-layered busbars according to the current size, and are aligned with the main busbars for easy fabrication and splicing, making installation and maintenance convenient.

[0017] This invention features a separately partitioned drawer compartment. The drawer mechanism connects to the incoming busbar via a new generation of spherical interfaces. The incoming busbar can be layered to improve current carrying capacity and temperature rise performance, depending on actual needs. The spherical interface assembly is installed in a shared male socket / moving contact base and features an automatic shutter design. The shutter is normally closed when the drawer is installed, providing protection against electric shock and dust. The structural design of the spherical assembly ensures high stability. Its multi-point, multi-line, and multi-faceted composite contact structure ensures that the switchgear drawer is protected from vibrations encountered during operation and avoids accidents caused by spring failure in traditional switchgear drawer connectors. Furthermore, this new connector has better temperature rise performance, providing a more reliable connection for drawer-type switchgear. This product is particularly suitable for critical projects with higher stability requirements and for special applications such as marine, railway, and subway applications, where the operating environment is subject to vibration or movement. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the three-dimensional oblique view structure of the present invention;

[0020] Figure 3 This is a partially enlarged structural schematic diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the rear structure of the present invention;

[0022] Figure 5This is a schematic diagram of the drawer in the extended state of the present invention;

[0023] Figure 6 This is a front view of the structure of the present invention without drawers;

[0024] Figure 7 A 3D view of the first drawer;

[0025] Figure 8 This is a three-dimensional view of the first drawer from another angle;

[0026] Figure 9 This is a 3D view of the second drawer;

[0027] Figure 10 This is a three-dimensional view of the second drawer from another angle;

[0028] Figure 11 This is a 3D view of the third drawer;

[0029] Figure 12 This is a three-dimensional view of the third drawer from another angle;

[0030] Figure 13 This is a magnified left-side view of the anti-electric shock and short-circuit mechanism of the present invention;

[0031] Figure 14 This is a right-view enlarged structural schematic diagram of the anti-electric shock and short-circuit mechanism of the present invention;

[0032] Figure 15 This is a schematic diagram of the exploded magnified structure of the present invention in its upright position;

[0033] Figure 16 This is a schematic diagram of the inverted, exploded, magnified structure of the present invention.

[0034] Figure 17 This is a perspective view of the insulating sleeve in this invention.

[0035] In the diagram: 1. Cabinet assembly; 11. Cabinet frame; 12. Base; 13. Side panel; 2. Drawer mechanism; 21. Drawer door panel; 22. Drawer lock body; 23. Drawer body; 3. Placement frame; 4. Connector mechanism; 41. Cable tray; 42. Male connector assembly; 421. Male socket; 422. Male socket main shell; 423. Self-closing part; 4231. Collar ring; 4232. Hinge post; 4233. Scalloped louver; 424. Ball head; 43. Female connector assembly; 431. Female socket; 432. Female socket main shell; 4321. Locking plate; 433. Annular groove; 434. Insulating sleeve; 4341. Positioning groove; 44. Partition; 5. First drawer; 6. Second drawer; 7. Third drawer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. In addition, the terms "first," "second," "third," "upper," "lower," "left," "right," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The present invention provides a low-voltage drawer-type switchgear structure as follows: Figures 1 to 4 As shown, the cabinet assembly 1 consists of a cabinet frame 11, a base 12, and a side panel 13. The base 12 is fixedly connected to the bottom of the cabinet frame 11 by bolts. The side panel 13 is fixedly connected to the left side of the cabinet assembly 1 by screws, and the side panel 13 is used for the protection of the entire cabinet. The cabinet assembly 1 also has a placement frame 3 for storage inside. Several drawer mechanisms 2 are provided on the left side of the cabinet assembly 1. The drawer mechanism 2 consists of a drawer door panel 21, a drawer lock body 22, and a drawer body 23. The drawer body 23 is slidably connected to the inside of the cabinet assembly 1. The drawer door panel 21 is hinged to the surface of the cabinet assembly 1 and located on one side of the drawer body 23. The drawer lock body 22 is rotatably connected to the surface of the drawer door panel 21 and is used for the opening and closing of the drawer door panel 21.

[0038] To accommodate different current values, this embodiment designs three drawer mechanisms 2, such as... Figure 5 , 6 As shown, the first drawer 5 has a capacity of 200A, the second drawer 6 has a capacity of 400A, and the third drawer 7 has a capacity of ≥600A. Each drawer is connected to the cabinet assembly 1 via a connecting joint mechanism 4. Figure 7 , 8 As shown, the first drawer 5 comprises a drawer door panel 21, a drawer lock body 22, and a drawer body 23; as Figure 9 , 10 As shown, the second drawer 6 comprises a drawer door panel 21, a drawer lock body 22, and a drawer body 23; as Figure 11 , 12 As shown, the third drawer 7 consists of a drawer door panel 21, a drawer lock body 22, and a drawer body 23.

[0039] Furthermore, such as Figure 13 as well as Figure 16 As shown, the back of the drawer body 23 is also provided with several sets of protective connector mechanisms 4. Each connector mechanism 4 consists of a cable outlet 41, a male connector assembly 42, a female connector assembly 43, and partitions 44. The cable outlet 41 is inclined downwards for easy connection to external cables. The female connector assembly 43 is fixedly connected to the back of the drawer body 23, and a male connector assembly 42 is inserted into the end of the female connector assembly 43. The male connector assembly 42 is fixed to the cabinet frame 11. One end of the male connector assembly 42 is fitted with a cable outlet 41, which facilitates cable routing and prevents bending. Three sets of partitions 44 are also inserted into the surface of the male connector assembly 42 to separate the cables. The male connector assembly 42 consists of a male socket 421, a male socket main shell 422, a self-closing part 423, and a ball head 424. The male socket 421 is fixedly connected to the cabinet frame 11 by four bolts. The surface of the male socket 421 is provided with... Four sets of through male socket main shells 422, each containing a ball head 424. One end of the ball head 424 is connected to the cable outlet 41. A self-closing part 423 is fitted onto the upper end of the male socket 421. This self-closing part 423 is used to prevent electric shock and to prevent dust. The self-closing part 423 is composed of a collar 4231, a hinge post 4232, and a fan-shaped louver 4233. The collar 4231 is fitted onto the male socket main shell 422. At the top, several sets of hinge posts 4232 are arranged circumferentially on the inner wall of the collar 4231, and the several sets of hinge posts 4232 together form a complete circle; each hinge post 4232 has a fan-shaped louver 4233 hinged inside, and multiple fan-shaped louvers 4233 are fixedly connected to the surface of the collar 4231 by a spring, and the fan-shaped louvers 4233 can automatically close when the male plug assembly 42 and the female plug assembly 43 are not plugged in.

[0040] During implementation, multiple connector mechanisms 4 are installed on the cabinet. The connector part has a unique design, with male plug combination 42 and female plug combination 43 respectively. The male plug combination 42 is designed with automatic closing louvers, which are divided into multiple fan shapes. Then, the multiple fan shapes are connected by a spring on the inside. When the plug is pulled out, the louvers can automatically close to prevent electric shock and to prevent dust.

[0041] Furthermore, such as Figure 14 as well as Figure 15As shown, the female plug assembly 43 includes a female socket 431, a female plug main shell 432, and an annular groove 433. The female socket 431 is fixedly connected to the surface of the cabinet frame 11, and the surface of the female socket 431 is provided with a through female plug main shell 432. The female plug main shell 432 and the male plug main shell 422 are interlocked. The end of the female plug main shell 432 is provided with an annular groove 433, and the surface of the annular groove 433 is fitted with an insulating sleeve 434. Several sets of locking pieces 4321 are fixed circumferentially inside the female plug main shell 432, and the locking pieces 4321 are surrounded by a spring to form a plum blossom shape. When the male plug assembly 42 and the female plug assembly 43 are connected, the ball head 424 is inserted into the plum blossom shape formed by the several sets of locking pieces 4321, which can tightly wrap the ball head 424 and make full contact.

[0042] like Figure 17 As shown, the insulating sleeve 434 of this embodiment has four positioning grooves 4341 in a cross shape, and the positioning grooves are open to facilitate the quick and accurate insertion of the external wiring board, while limiting the external wiring board to be installed horizontally or vertically.

[0043] During implementation, a plum blossom ball head is designed on the female plug assembly 43. Multiple contacts are surrounded by a spring to form a plum blossom shape, and the inside is spherical. This can tightly wrap the ball head 424, making the release tighter and preventing single-point contact, which could cause local overheating and short circuit.

[0044] Currently, the low-voltage switchgear used in the market is GGD (fixed type) and GCK (drawer type). This invention is a new generation of low-voltage drawer switchgear, and its main features are:

[0045] 1. The traditional GCK drawer-cabinet connection using bridge-type clips for moving and stationary contacts has been changed to a new spherical pendulum-shaped moving and stationary contact connection. This connection method has achieved a qualitative leap in stability and reliability. The spherical 360-degree surround fit provides excellent heat dissipation performance, and the current can reach up to 1000A. It also has excellent shock resistance. After the moving and stationary contacts are properly connected, there is a movable conical space with a degree of freedom, allowing for shaking operation under load. In principle, this overcomes the possibility of fixing failure or deformation caused by hard connections when encountering severe vibrations in the operating environment, which could lead to the moving and stationary contact connection points separating and causing instantaneous high temperature burn-out of the contacts, resulting in accidents.

[0046] 2. Its new structural design features all drawer compartments that are independently enclosed and completely isolated from the main drain compartment, which effectively protects against cross-contamination of dust during use and prevents small animals from entering.

[0047] 3. All vertical busbars are in the top busbar compartment. The branch incoming busbars can be flexibly selected as single or multi-layered busbars according to the current size, and are in the same direction as the main busbars for easy fabrication and splicing, making them easy to install and maintain.

[0048] Working principle: During use, multiple connector mechanisms 4 are installed on the cabinet. The connector part has a unique design, with male plug combination 42 and female plug combination 43 respectively. The male plug combination 42 is designed with automatic closing louvers, which are divided into multiple fan shapes. The multiple fan shapes are connected by a spring on the inside. When the female plug combination 43 is pulled out, the louvers can automatically close to prevent electric shock and to prevent dust.

[0049] Meanwhile, the female connector 43 is designed with a plum blossom ball head. Multiple contacts are surrounded by a spring to form a plum blossom shape, and the inside is spherical. This can tightly wrap the spherical connector, making the connection tighter and preventing single-point contact, which could cause local overheating and short circuit. This will ultimately complete the use of the low-voltage switchgear.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A low-voltage drawer-type switch cabinet, comprising a cabinet assembly (1), characterized in that: The cabinet assembly (1) consists of a cabinet frame (11), a base (12), and a side panel (13). The bottom of the cabinet frame (11) is fixedly connected to the base (12) by bolts. Several sets of drawer mechanisms (2) are provided on the left side of the cabinet assembly (1). Each drawer mechanism (2) consists of a drawer door panel (21), a drawer lock body (22), and a drawer body (23). The drawer body (23) is slidably connected to the inside of the cabinet assembly (1). Several sets of protective connecting joint mechanisms (4) are also provided on the surface of the drawer body (23). The connecting joint mechanism (4) is composed of an outlet... The device consists of a cable tray (41), a male connector assembly (42), a female connector assembly (43), and a partition (44). The female connector assembly (43) is fixedly connected to the surface of the drawer body (23), and the male connector assembly (42) is inserted into the end of the female connector assembly (43). One end of the male connector assembly (42) is fixed to the cabinet frame (11), and the other end of the male connector assembly (42) is fitted with a cable tray (41). The cable tray (41) facilitates the cable exit and prevents bending. Three partitions (44) are also inserted into the surface of the male connector assembly (42). The partitions (44) are used to separate the cables.

2. A low-voltage drawer-type switchgear according to claim 1, characterized in that: The left side of the cabinet assembly (1) is fixedly connected with a side guard plate (13) by screws, and the side guard plate (13) is used for the protection of the entire cabinet. The cabinet assembly (1) is also provided with a placement frame (3) for placement.

3. A low-voltage drawer-type switchgear according to claim 1, characterized in that: The cabinet assembly (1) is hinged to a drawer door panel (21) on one side of the drawer body (23), and a drawer lock body (22) is rotatably connected to the surface of the drawer door panel (21), and the drawer lock body (22) is used for opening and closing the drawer door panel (21).

4. A low-voltage drawer-type switchgear according to claim 1, characterized in that: The male connector assembly (42) consists of a male socket (421), a male socket housing (422), a self-closing part (423), and a ball head 224. The male socket (421) is fixedly connected to the surface of the drawer body (23) by four bolts.

5. A low-voltage drawer-type switchgear according to claim 1, characterized in that: The surface of the male socket (421) is provided with four sets of through male socket main shells (422). The upper end of the male socket (421) is fitted with a self-closing part (423), which is used to prevent electric shock and to prevent dust.

6. A low-voltage drawer-type switchgear according to claim 5, characterized in that: The self-closing part (423) is composed of a collar (4231), a hinge post (4232) and a fan-shaped louver (4233), and the collar (4231) is fitted on the top of the male plug main shell (422).

7. A low-voltage drawer-type switchgear according to claim 6, characterized in that: The inner wall of the collar (4231) is provided with several sets of hinge posts (4232) along the circumference, and the several sets of hinge posts (4232) together form a complete circle; each of the hinge posts (4232) is hinged with a fan-shaped louver (4233), and multiple fan-shaped louvers (4233) are fixedly connected to the surface of the collar (4231) by a spring, and when the male plug assembly (42) and the female plug assembly (43) are not plugged in, the fan-shaped louvers (4233) can automatically close.

8. A low-voltage drawer-type switchgear according to claim 1, characterized in that: The female socket assembly (43) includes a female socket (431), a female socket main shell (432), and an annular groove (433). The female socket (431) is fixedly connected to the surface of the cabinet frame (11), and the surface of the female socket (431) is provided with a through female socket main shell (432), and the female socket main shell (432) and the male socket main shell (422) are mutually inserted.

9. A low-voltage drawer-type switchgear according to claim 8, characterized in that: The end of the female plug main shell (432) is provided with an annular groove (433), and the surface of the annular groove (433) is fitted with an insulating sleeve (434). Several sets of locking pieces (4321) are fixed circumferentially inside the female plug main shell (432), and the locking pieces (4321) are surrounded by a spring to form a plum blossom shape.

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