Switch cabinet

Abstract

The utility model provides a switch cabinet, which comprises a cabinet body, a circuit breaker chamber, a bus chamber and a cable chamber are arranged in the cabinet body, a first contact group is arranged in the bus chamber, and a second contact group is arranged in the cable chamber; the power distribution component comprises a circuit breaker main body, a first contact assembly and a second contact assembly, the circuit breaker main body is arranged in the circuit breaker chamber, and the first contact assembly comprises a first base, a first contact main body arranged on the first base and a first movable contact; the second contact assembly comprises a second base, a second contact main body arranged on the second base, and a second movable contact; the linkage component comprises a first linkage assembly and a second linkage assembly. By arranging the first linkage assembly used for disconnecting or connecting the first movable contact and the first contact group and the second linkage assembly used for disconnecting or connecting the second movable contact and the second contact group, the function that the circuit breaker main body not only can perform upper wire breaking but also can perform lower wire breaking is realized, and the circuit breaker is high in applicability, safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a switch cabinet. Background Art

[0002] A switchgear is a type of electrical equipment. External wiring in the switchgear first enters the main control switch inside the cabinet, then passes to the sub-control switches, with each branch configured as needed. The switchgear's primary function is to open and close, control, and protect electrical equipment during power generation, transmission, distribution, and energy conversion in the power system. The main components within the switchgear include circuit breakers, disconnectors, load switches, operating mechanisms, transformers, and various protective devices.

[0003] Some switchgear require circuit breakers that can accommodate both top- and bottom-feed lines, often requiring a wide contact span (the distance between the moving and static contacts) and a large phase-to-phase distance. Switchgear with dual breakpoints or a high margin of short-circuit breaking capacity is urgently needed to address the potential for interphase short circuits and high transient recovery voltages. Utility Model Content

[0004] Based on this, in order to solve the problem that the circuit breaker in the existing switch cabinet can only have line input from the top or bottom, the utility model provides a switch cabinet, and its specific technical solution is as follows:

[0005] A switch cabinet, comprising:

[0006] A cabinet body, wherein a circuit breaker chamber, a busbar chamber and a cable chamber are provided in the cabinet body, a first contact group is provided in the busbar chamber, and a second contact group is provided in the cable chamber;

[0007] A power distribution component, comprising a circuit breaker body, a first contact assembly, and a second contact assembly, wherein the circuit breaker body is disposed in the circuit breaker chamber and is provided with a first connection contact for connecting to the first contact assembly and a second connection contact for connecting to the second contact assembly, wherein the first contact assembly comprises a first base, a first contact body disposed on the first base, and a first movable contact, and the second contact assembly comprises a second base, a second contact body disposed on the second base, and a second movable contact;

[0008] The linkage component includes a first linkage component and a second linkage component, wherein the first linkage component is used to disconnect or connect the first movable contact and the first contact group, and the second linkage component is used to disconnect or connect the second movable contact and the second contact group.

[0009] The above-mentioned switch cabinet realizes the function of having a circuit breaker body that can both disconnect the line upward and disconnect the line downward by providing a first linkage component for disconnecting or connecting the first movable contact and the first contact group, and a second linkage component for disconnecting or connecting the second movable contact and the second contact group. It has strong applicability, safety and reliability.

[0010] Furthermore, the first linkage assembly includes a first lever unit arranged on the outside of the cabinet, a first connecting unit arranged inside the cabinet, and a first rod group connecting the first lever unit and the first connecting unit; the first connecting unit includes a first rotating rod rotatably connected to the first base, a first connecting plate connected to the first rotating rod hub, and a first rocker arm connecting the first movable contact and the first connecting plate.

[0011] Furthermore, the second linkage assembly includes a second lever unit arranged on the outside of the cabinet, a second connecting unit arranged inside the cabinet, and a second rod group connecting the second lever unit and the second connecting unit; the second connecting unit includes a second rotating rod rotatably connected to the second base, a second connecting plate connected to the second rotating rod hub, and a second rocker arm connecting the second movable contact and the second connecting plate.

[0012] Furthermore, the first connecting unit also includes a first elastic return member, which is installed on the first rocker member; when the first connecting contact and the first contact group are in a connected state, the first elastic return member undergoes elastic compression deformation; when the first connecting contact and the first contact group are in a disconnected state, the first elastic return member restores the elastic deformation.

[0013] Furthermore, the linkage component also includes a first auxiliary component, which includes an auxiliary lever unit linked with the second lever unit, an auxiliary connection unit arranged in the cabinet, and a third rod group connecting the auxiliary lever unit and the auxiliary connection unit; the auxiliary connection unit is used to connect to the grounding switch.

[0014] Furthermore, the auxiliary connection unit includes an auxiliary rotating rod rotatably connected to the second base, an auxiliary connecting plate connected to the auxiliary rotating rod hub, and a switch contact arranged on the auxiliary connecting plate, and the auxiliary connecting plate is connected to the third rod group.

[0015] Furthermore, the first rod group connection includes a J-shaped rod, a connecting long rod and a swing block connected in sequence; the J-shaped rod is connected to the first shifting rod unit, and the swing block is fixedly connected to the second connecting plate.

[0016] Furthermore, the busbar chamber is provided with a branch copper busbar assembly and a static contact box assembly, and the static contact box assembly is provided with three static contact pieces; the first contact group includes three first static contacts, and the three first static contacts are connected to the three static contact pieces one by one through the branch copper busbar assembly.

[0017] Furthermore, the cable room is provided with a zero-sequence current transformer.

[0018] Furthermore, the second linkage component and the first linkage component have the same structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but rather the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0020] Figure 1 This is a schematic structural diagram of a switch cabinet according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the switch cabinet according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 3 This is a cross-sectional view of the switch cabinet according to an embodiment of the present invention. Figure 2 .

[0023] Description of reference numerals:

[0024] 1. Cabinet; 2. Power distribution components; 3. Interlocking components;

[0025] 11. Circuit breaker room; 12. Busbar room; 13. Cable room;

[0026] 121. First contact group; 131. Second contact group; 132. Zero-sequence current transformer;

[0027] 21. Circuit breaker body; 22. First contact assembly; 23. Second contact assembly; 24. First base; 25. First contact body; 26. First movable contact; 27. Second base; 28. Second contact body; 29. ​​Second movable contact;

[0028] 211. First connection contact; 212. Second connection contact;

[0029] 31. First linkage component; 32. Second linkage component; 33. First auxiliary component;

[0030] 311, first lever unit; 312, first connecting unit; 313, first lever group; 314, first rotating rod; 315, first connecting plate; 316, first rocker member; 317, first elastic return member;

[0031] 321, second lever unit; 322, second connecting unit; 323, second lever group; 324, second rotating rod; 325, second connecting plate; 326, second rocker member;

[0032] 331. Auxiliary lever unit; 332. Auxiliary connecting unit; 333. Third lever group; 334. Auxiliary rotating lever; 335. Auxiliary connecting plate; 336. Switch contact;

[0033] 301, J-shaped rod; 302, connecting long rod; 303, swing block;

[0034] 41. Branch copper busbar assembly; 42. Static contact box assembly. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0039] like Figure 1 and Figure 2 、 Figure 3 As shown, a switch cabinet in one embodiment of the present invention includes:

[0040] A cabinet 1 is provided with a circuit breaker chamber 11, a busbar chamber 12 and a cable chamber 13. The busbar chamber 12 is provided with a first contact group 121, and the cable chamber 13 is provided with a second contact group 131;

[0041] The power distribution component 2 includes a circuit breaker body 21, a first contact assembly 22, and a second contact assembly 23. The circuit breaker body 21 is disposed in the circuit breaker chamber 11. The circuit breaker body 21 is provided with a first connection contact 211 for connecting to the first contact assembly 22, and a second connection contact 212 for connecting to the second contact assembly 23. The first contact assembly 22 includes a first base 24, a first contact body 25 disposed on the first base 24, and a first movable contact 26. The second contact assembly 23 includes a second base 27, a second contact body 28 disposed on the second base 27, and a second movable contact 29.

[0042] The linkage component 3 includes a first linkage component 31 and a second linkage component 32. The first linkage component 31 is used to disconnect or connect the first movable contact 26 and the first contact group 121, and the second linkage component 32 is used to disconnect or connect the second movable contact 29 and the second contact group 131.

[0043] The above-mentioned switch cabinet realizes the function of having the circuit breaker body 21 to disconnect the line both upward and downward by providing a first linkage component 31 for disconnecting or connecting the first movable contact 26 and the first contact group 121, and a second linkage component 32 for disconnecting or connecting the second movable contact 29 and the second contact group 131, so that the circuit breaker body 21 can disconnect the line both upward and downward, and has strong applicability, safety and reliability.

[0044] In one embodiment, the first linkage assembly 31 includes a first lever unit 311 disposed outside the cabinet 1, a first connecting unit 312 disposed within the cabinet 1, and a first rod assembly 313 connecting the first lever unit 311 and the first connecting unit 312. The first connecting unit 312 includes a first rotating rod 314 rotatably connected to the first base 24, a first connecting plate 315 connected to the hub of the first rotating rod 314, and a first swinging member 316 connecting the first movable contact 26 and the first connecting plate 315. Thus, by moving the first lever unit 311, the first rod assembly 313 is driven, causing the first rotating rod 314 to rotate, thereby driving the first connecting plate 315 to rotate. The rotation of the first connecting plate 315 causes the first swinging member 316 to swing, thereby disconnecting the first movable contact 26 from the first contact assembly 121.

[0045] In one embodiment, the second linkage assembly 32 includes a second lever unit 321 disposed outside the cabinet 1, a second connecting unit 322 disposed inside the cabinet 1, and a second rod group 323 connecting the second lever unit 321 and the second connecting unit 322. The second connecting unit 322 includes a second rotating lever 324 rotatably connected to the second base 27, a second connecting plate 325 connected to the hub of the second rotating lever 324, and a second swinging member 326 connecting the second movable contact 29 and the second connecting plate 325. Thus, by moving the second lever unit 321, the second rod group 323 is driven, causing the second rotating lever 324 to rotate, thereby driving the second connecting plate 325 to rotate. The rotation of the second connecting plate 325 causes the second swinging member 326 to swing, thereby disconnecting the second movable contact 29 from the second contact group 131.

[0046] like Figure 1 and Figure 3 As shown, in one embodiment, the first connecting unit 312 further includes a first elastic return member 317, which is mounted on the first rocker member 316. Thus, when the first connecting contact 211 and the first contact group 121 are in a connected state, the first elastic return member 317 undergoes elastic compression deformation; when the first connecting contact 211 and the first contact group 121 are in a disconnected state, the first elastic return member 317 recovers its elastic deformation.

[0047] In one embodiment, the linkage component 3 also includes a first auxiliary component 33, which includes an auxiliary lever unit 331 linked to the second lever unit 321, an auxiliary connection unit 332 arranged in the cabinet 1, and a third rod group 333 connecting the auxiliary lever unit 331 and the auxiliary connection unit 332; the auxiliary connection unit 332 is used to connect to the grounding switch.

[0048] In one embodiment, the auxiliary connection unit 332 includes an auxiliary rotating rod 334 rotatably connected to the second base 27, an auxiliary connection plate 335 connected to the hub of the auxiliary rotating rod 334, and a switch contact 336 disposed on the auxiliary connection plate 335. The auxiliary connection plate 335 is connected to the third rod assembly 333. Thus, when the second lever unit 321 is moved, the auxiliary lever unit 331 is also moved, driving the auxiliary rotating rod 334 to rotate via the third rod assembly 333. The rotation of the auxiliary rotating rod 334 drives the auxiliary connection plate 335 to rotate, thereby disconnecting the switch contact 336 on the auxiliary connection plate 335 from the grounding switch.

[0049] In one embodiment, the first rod group 313 includes a J-shaped rod 301, a connecting long rod 302 and a swing block 303 connected in sequence; the J-shaped rod 301 is connected to the first lever unit 311, and the swing block 303 is fixedly connected to the first connecting plate 315.

[0050] In one embodiment, the busbar chamber 12 is provided with a branch copper busbar assembly 41 and a static contact box assembly 42, and the static contact box assembly 42 is provided with three static contact pieces; the first contact group 121 includes three first static contacts, and the three first static contacts are connected to the three static contact pieces one by one through the branch copper busbar assembly 41.

[0051] In one embodiment, the cable compartment 13 is equipped with a zero-sequence current transformer 132. By installing the zero-sequence current transformer 132, the three phases of the outgoing high-voltage cable pass through the center of the zero-sequence current transformer. Under normal circumstances, the vector sum of the three-phase currents is zero. However, when a single-phase ground fault occurs, the secondary coil will induce current, driving the relay and activating the protection device.

[0052] In one embodiment, the second linkage assembly 32 has the same structure as the first linkage assembly 31. This makes it easier to inspect and repair the linkage component 3 and replace parts.

[0053] In one embodiment, the cabinet 1 is further provided with a busbar bushing, which is used to support and fix the busbar and insulate the busbar from the cabinet. The main busbar is used to collect and distribute electrical energy, and the branch busbar is used to branch from the main busbar to the upper static contact of the circuit breaker. The static contact box is used to support and fix the upper static contact of the circuit breaker and insulate the upper static contact from the cabinet 1.

[0054] In one embodiment, the cable room is also provided with a current transformer, an outgoing high-voltage cable, a lightning arrester and a voltage sensor. The current transformer is used to measure the outgoing line current value and provide current signals for ammeters, metering devices, protective devices, etc. The outgoing high-voltage cable is used to connect the outgoing side to the power load through the high-voltage cable. The lightning arrester is used for equipment overvoltage protection and is connected in parallel on the outgoing side of the circuit breaker. Generally, it does not need to be operated after the equipment is operating normally. The voltage sensor includes a sensor for the live display device and provides a live signal for the live display device and the electromagnetic lock.

[0055] In one embodiment, the cable room is provided with a rear cabinet door, which is tightened with hexagonal bolts and has an electromagnetic lock. The electromagnetic lock can only be unlocked when the outgoing line side is not energized. An operating power supply is required, and the operating power supply is directly taken from the DC busbar on the top of the cabinet. In special circumstances, a key can be used to mechanically unlock the door.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A switch cabinet, characterized in that: include: A cabinet (1), wherein a circuit breaker chamber (11), a busbar chamber (12) and a cable chamber (13) are provided in the cabinet (1); a first contact group (121) is provided in the busbar chamber (12), and a second contact group (131) is provided in the cable chamber (13); A power distribution component (2) comprising a circuit breaker body (21), a first contact assembly (22) and a second contact assembly (23); the circuit breaker body (21) being arranged in the circuit breaker chamber (11); the circuit breaker body (21) being provided with a first connection contact (211) for connecting with the first contact assembly (22) and a second connection contact (212) for connecting with the second contact assembly (23); the first contact assembly (22) comprising a first base (24), a first contact body (25) arranged on the first base (24), and a first movable contact (26); the second contact assembly (23) comprising a second base (27), a second contact body (28) arranged on the second base (27), and a second movable contact (29); A linkage component (3) comprises a first linkage assembly (31) and a second linkage assembly (32), wherein the first linkage assembly (31) is used to disconnect or connect the first movable contact (26) and the first contact group (121), and the second linkage assembly (32) is used to disconnect or connect the second movable contact (29) and the second contact group (131).

2. A switch cabinet according to claim 1, characterized in that: The first linkage assembly (31) comprises a first lever unit (311) arranged outside the cabinet (1), a first connecting unit (312) arranged inside the cabinet (1), and a first rod group (313) connecting the first lever unit (311) and the first connecting unit (312); The first connecting unit (312) includes a first rotating rod (314) rotatably connected to the first base (24), a first connecting plate (315) connected to the hub of the first rotating rod (314), and a first rocker member (316) connecting the first movable contact (26) and the first connecting plate (315).

3. The switch cabinet according to claim 2, characterized in that: The second linkage assembly (32) comprises a second lever unit (321) arranged outside the cabinet (1), a second connecting unit (322) arranged inside the cabinet (1), and a second rod group (323) connecting the second lever unit (321) and the second connecting unit (322); The second connecting unit (322) includes a second rotating rod (324) rotatably connected to the second base (27), a second connecting plate (325) connected to the hub of the second rotating rod (324), and a second rocker member (326) connecting the second movable contact (29) and the second connecting plate (325).

4. The switch cabinet according to claim 2, characterized in that: The first connecting unit (312) further includes a first elastic reset member (317), and the first elastic reset member (317) is installed on the first rocker member (316); When the first connecting contact (211) and the first contact group (121) are in a connected state, the first elastic reset member (317) undergoes elastic compression deformation; When the first connecting contact (211) and the first contact group (121) are in a disconnected state, the first elastic return member (317) recovers its elastic deformation.

5. The switch cabinet according to claim 3, characterized in that: The linkage component (3) further includes a first auxiliary assembly (33), the first auxiliary assembly (33) including an auxiliary lever unit (331) linked to the second lever unit (321), an auxiliary connection unit (332) disposed in the cabinet (1), and a third rod group (333) connecting the auxiliary lever unit (331) and the auxiliary connection unit (332); The auxiliary connection unit (332) is used to connect to the grounding switch.

6. The switch cabinet according to claim 5, characterized in that: The auxiliary connection unit (332) comprises an auxiliary rotating rod (334) rotatably connected to the second base (27), an auxiliary connecting plate (335) connected to the hub of the auxiliary rotating rod (334), and a switch contact (336) arranged on the auxiliary connecting plate (335), wherein the auxiliary connecting plate (335) is connected to the third rod group (333).

7. The switch cabinet according to claim 3, characterized in that: The first rod group (313) comprises a J-shaped rod (301), a connecting long rod (302) and a swing block (303) connected in sequence; The J-shaped rod (301) is connected to the first shifting rod unit (311), and the swing block (303) is fixedly connected to the second connecting plate (325).

8. The switch cabinet according to claim 2, characterized in that: A branch copper busbar assembly (41) and a static contact box assembly (42) are provided in the busbar chamber (12), and the static contact box assembly (42) is provided with three static contact pieces; The first contact group (121) comprises three first static contacts, and the three first static contacts are connected to the three corresponding static contact pieces one by one through a branch copper busbar assembly (41).

9. The switch cabinet according to claim 1, characterized in that: The cable chamber (13) is provided with a zero-sequence current transformer (132).

10. The switch cabinet according to claim 3, characterized in that: The second linkage component (32) and the first linkage component (31) have the same structure.

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