A gas chamber and ring network cabinet

Abstract

The present invention discloses an air chamber and a ring network cabinet, wherein the air chamber comprises: a shell and components arranged in the shell from top to bottom: an upper isolating assembly, including an upper isolating switch and an upper grounding static contact; a circuit breaker assembly; a lower isolating assembly, including a lower isolating switch and a lower grounding static contact; a linkage drive mechanism, wherein the upper end and the lower end are respectively connected to the upper isolating switch and the lower isolating switch, and the linkage drive mechanism can drive the upper isolating switch and the lower isolating switch to rotate, and make the upper isolating switch connected to the upper grounding static contact while the lower isolating switch is connected to the lower grounding static contact. In this arrangement, the linkage drive mechanism drives the upper isolating switch to connect to the upper grounding static contact while the lower isolating switch is connected to the lower grounding static contact, so that the upper isolating assembly and the lower isolating assembly are synchronously grounded, so as to ensure the power-off safety maintenance of the internal network bus.

Description

Technical Field

[0001] The present invention relates to the technical field of ring main unit, and in particular to an air chamber and a ring main unit. Background Art

[0002] In the environment of comprehensive popularization of distribution network automation, ring main units have evolved into a variety of different cabinet types. In order to facilitate the maintenance of the power distribution system, some users adopt the upper isolation circuit breaker solution. However, due to the characteristics of the ring main unit distribution system, the power-off safety maintenance of the internal network busbar cannot be guaranteed, that is, the busbar is not grounded. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a gas chamber, which realizes the grounding of the internal network busbar through the linkage of the grounding switch of the lower isolation part and the grounding switch of the upper isolation part.

[0004] The present invention also provides a ring main unit having the air chamber as described above.

[0005] An air chamber according to an embodiment of the first aspect of the present invention comprises:

[0006] An air chamber, characterized by comprising a shell and arranged in the shell in sequence from top to bottom:

[0007] An upper isolation assembly, comprising an upper bracket, an upper isolation switch and an upper grounding static contact, wherein the upper isolation switch and the upper grounding static contact are both arranged on the upper bracket;

[0008] Circuit breaker components;

[0009] A lower isolation assembly, comprising a lower bracket, a lower isolation switch and a lower grounding static contact, wherein the lower isolation switch and the lower grounding static contact are both arranged on the lower bracket;

[0010] A linkage drive mechanism, the upper end and the lower end of which are respectively connected to the upper isolating switch and the lower isolating switch, the linkage drive mechanism can drive the upper isolating switch and the lower isolating switch to rotate, and make the upper isolating switch connected to the upper grounding static contact while the lower isolating switch is connected to the lower grounding static contact.

[0011] An air chamber according to the first aspect of an embodiment of the present invention has at least the following beneficial effects: while the upper isolating switch is driven by a linkage drive mechanism to connect to the upper grounding static contact, the lower isolating switch is connected to the lower grounding static contact, thereby achieving synchronous grounding of the upper isolation assembly and the lower isolation assembly to ensure safe power-off maintenance of the intranet bus.

[0012] According to some embodiments of the present invention, the upper isolation assembly also includes an upper isolation static contact, the circuit breaker assembly includes an upper busbar and a lower busbar, one end of the upper isolation switch is connected to the upper busbar, the linkage drive mechanism can drive the other end of the upper isolation switch to connect to the upper isolation static contact while the lower isolation switch is connected to the lower busbar, and the upper isolation static contact is used to connect an external circuit.

[0013] According to some embodiments of the present invention, it also includes an outgoing line terminal assembly, which includes a mounting plate and an outgoing line busbar arranged on the mounting plate, one end of the lower isolating switch is connected to the outgoing line busbar, and the other end is driven by the linkage drive mechanism to connect to the lower busbar or the lower grounding static contact.

[0014] According to some embodiments of the present invention, the lower isolation assembly further includes a lower isolation static contact, the lower isolation static contact is connected to the lower busbar, and the linkage drive mechanism can drive the lower isolation switch to connect the lower isolation static contact.

[0015] According to some embodiments of the present invention, the upper isolation assembly also includes an upper support plate for supporting the upper isolation static contact and the upper grounding static contact, the lower isolation assembly also includes a lower support plate for supporting the lower isolation static contact and the lower grounding static contact, and the circuit breaker assembly includes a plurality of fixed plates, and the upper support plate, the lower support plate and the fixed plate are all made of epoxy resin.

[0016] According to some embodiments of the present invention, the circuit breaker assembly further includes a vacuum arc extinguishing chamber and an insulating rod connecting the vacuum arc extinguishing chamber, and the vacuum arc extinguishing chamber and the insulating rod are arranged in a horizontal direction.

[0017] According to some embodiments of the present invention, the linkage drive mechanism includes a main drive component, a slave drive component and a linkage pull rod, the main drive component is movably disposed on the lower bracket and connected to the lower isolating switch, the slave drive component is movably disposed on the upper bracket and movably connected to the upper isolating switch, and the two ends of the linkage pull rod are respectively connected to the main drive component and the slave drive component.

[0018] According to some embodiments of the present invention, the main drive assembly includes a drive arm, a transmission member, a rocker arm, a main drive shaft, a drive plate and a switch connecting rod. The drive arm is hinged to the lower bracket through the transmission shaft, and the two ends of the transmission member are respectively hinged to the drive arm and the rocker arm. One end of the rocker arm away from the transmission member is connected to the main drive shaft, one end of the drive plate is connected to the main drive shaft, and the other end is hinged to the switch connecting rod. The transmission shaft is also connected to a dynamic seal.

[0019] According to some embodiments of the present invention, the slave drive assembly includes a slave drive shaft, a drive plate, and a switch connecting rod, one end of the drive plate is connected to the slave drive shaft, and the other end is hinged to the switch connecting rod.

[0020] A ring main unit according to an embodiment of the second aspect of the present invention has the air chamber as described above.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 A schematic diagram of the structure of an air chamber according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A partial enlarged schematic diagram of the air chamber at A shown;

[0025] Figure 3 for Figure 1 A partial enlarged schematic diagram of point B of the air chamber shown.

[0026] An upper isolation assembly 100, an upper bracket 110, an upper isolation switch 120, an upper grounding static contact 130, an upper isolation static contact 140, and an upper support plate 150;

[0027] Circuit breaker assembly 200, upper busbar 210, lower busbar 220, fixing plate 230, vacuum interrupter 240, insulating pull rod 250;

[0028] A lower isolation assembly 300, a lower bracket 310, a lower isolation switch 320, a lower grounding static contact 330, a lower isolation static contact 340, and a lower support plate 350;

[0029] Linkage drive mechanism 400, drive arm 410, transmission member 420, rocker arm 430, main drive shaft 440, slave drive shaft 450, drive plate 460, switch link 470, linkage pull rod 480;

[0030] Outlet terminal assembly 500, mounting plate 510, outlet busbar 520;

[0031] Shell 600. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] Reference Figures 1 to 3 According to an embodiment of the first aspect of the present invention, an air chamber comprises a housing 600 and an upper isolation assembly 100, a circuit breaker assembly 200, a lower isolation assembly 300 and a linkage drive mechanism 400 which are sequentially arranged in the housing 600 from top to bottom, wherein the upper isolation assembly 100 and the lower isolation assembly 300 are both three-station and designed in a horizontal three-phase arrangement to reduce the cabinet height and volume of the ring network cabinet, the upper isolation assembly 100 comprises an upper bracket 110, an upper isolating switch 120 and an upper grounding static contact 130, and the upper isolating switch 120 and the upper grounding static contact 130 are both arranged The lower isolating assembly 300 includes a lower bracket 310, a lower isolating switch 320 and a lower grounding static contact 330, and the lower isolating switch 320 and the lower grounding static contact 330 are both arranged on the lower bracket 310; the linkage driving mechanism 400, the upper and lower ends of which are respectively connected to the upper isolating switch 120 and the lower isolating switch 320, and the linkage driving mechanism 400 can drive the upper isolating switch 120 and the lower isolating switch 320 to rotate, and make the upper isolating switch 120 connected to the upper grounding static contact 130 while the lower isolating switch 320 is connected to the lower grounding static contact 330.

[0037] It should be noted that the lower end of the upper isolating switch 120 is fixedly connected to the circuit breaker assembly 200, and the lower end of the lower isolating switch 320 is fixedly connected to the outlet terminal. The linkage drive mechanism 400 can drive the upper end of the upper isolating switch 120 to rotate to the upper grounding static contact 130, and the lower isolating switch 320 can also rotate to the lower grounding static contact 330, so that the upper isolation assembly 100 and the lower isolation assembly 300 are disconnected from the circuit breaker assembly 200 and grounded at the same time, realizing the grounding of the internal network bus, meeting the grounding requirements and ensuring maintenance safety; the upper isolating switch 120 can also be driven to rotate to the upper isolation static contact 140 and connected, and the lower isolating switch 320 can be rotated to the lower busbar 220 and connected, so that the external circuit is connected to the air intake chamber, and synchronous power-off and synchronous power-on are realized through the linkage drive mechanism 400.

[0038] An air chamber according to the first aspect of an embodiment of the present invention has at least the following beneficial effects: while the upper isolating switch 120 is driven by the linkage drive mechanism 400 to connect to the upper grounding static contact 130, the lower isolating switch 320 is connected to the lower grounding static contact 330, so that the upper isolation component 100 and the lower isolation component 300 are grounded synchronously to ensure the safe power-off maintenance of the internal network bus.

[0039] According to some embodiments of the present invention, referring to Figures 1 to 3 The upper isolation assembly 100 also includes an upper isolation static contact 140, and the circuit breaker assembly 200 includes an upper busbar 210 and a lower busbar 220. One end of the upper isolation switch 120 is connected to the upper busbar 210. It can be understood that the one end mentioned here is the lower end of the upper isolation switch 120 described above. The linkage drive mechanism 400 can drive the other end of the upper isolation switch 120 to connect to the upper isolation static contact 140, while the upper end of the lower isolation switch 320 is connected to the lower busbar 220. The other end mentioned here is the upper end of the upper isolation switch 120. The upper isolation static contact 140 is used to connect to an external circuit. It can be understood that the upper isolation switch 120 is in a normally closed state with the circuit breaker assembly 200 and in a normally open state with the external circuit. It needs to be driven by the linkage drive mechanism 400 to rotate to the upper isolation static contact 140 for connection to connect to the external circuit.

[0040] According to some embodiments of the present invention, referring to Figures 1 to 3 , and also includes an outlet terminal assembly 500, which includes a mounting plate 510 and an outlet busbar 520 arranged on the mounting plate 510. One end of the lower isolating switch 320 is connected to the outlet busbar 520, and the other end is driven by the linkage drive mechanism 400 to connect to the lower busbar 220 or the lower grounding static contact 330. It can be understood that the lower isolating switch 320 is in a normally closed state with the external circuit and in a normally open state with the circuit breaker assembly 200. It needs to be driven by the linkage drive mechanism 400 to rotate to the lower isolating static contact 340 for connection before the circuit breaker assembly 200 can be connected.

[0041] According to some embodiments of the present invention, referring to Figures 1 to 3 The lower isolation assembly 300 also includes a lower isolation static contact 340 , which is connected to the lower busbar 220 . The linkage drive mechanism 400 can drive the lower isolation switch 320 to connect the lower isolation static contact 340 to connect the external circuit and the circuit breaker assembly 200 .

[0042] According to some embodiments of the present invention, referring to Figures 1 to 3 The upper isolation assembly 100 also includes an upper support plate 150 for supporting an upper isolation static contact 140 and an upper grounding static contact 130. The lower isolation assembly 300 also includes a lower support plate 350 for supporting a lower isolation static contact 340 and a lower grounding static contact 330. The circuit breaker assembly 200 includes a plurality of fixing plates 230. The upper support plate 150, the lower support plate 350 and the fixing plate 230 are all made of epoxy resin. The fixing plate 230, the upper support plate 150, the lower support plate 350 and the fixing plate 230, which are plates directly in contact with the charged body, are insulated by epoxy resin, which can reduce the creepage distance between the shell 600 and avoid the shell 600 from being charged.

[0043] According to some embodiments of the present invention, referring to Figures 1 to 3 The circuit breaker assembly 200 also includes a vacuum arc chamber 240 and an insulating rod 250 connecting the vacuum arc chamber 240. The vacuum arc chamber 240 and the insulating rod 250 are arranged in a horizontal direction. The vacuum arc chamber 240 is arranged horizontally, and the insulating rod 250 is arranged horizontally, so that the energized high-voltage part and the mechanical part of the circuit breaker are separated, thereby improving safety. At the same time, the upper busbar 210 and the lower busbar 220 in the horizontally arranged circuit breaker assembly 200 have a simple structure, are distributed in an up-and-down manner, and have a consistent structure and a simple arrangement, which can reduce the size of the gas chamber and the ring network cabinet.

[0044] According to some embodiments of the present invention, referring to Figures 1 to 3 The linkage drive mechanism 400 includes a main drive component, a slave drive component and a linkage pull rod 480. The main drive component is movably arranged on the lower bracket 310 and connected to the lower isolating switch 320. The slave drive component is movably arranged on the upper bracket 110 and movably connected to the upper isolating switch 120. The two ends of the linkage pull rod 480 are respectively connected to the main drive component and the slave drive component.

[0045] According to some embodiments of the present invention, referring to Figures 1 to 3The main driving assembly includes a driving arm 410, a transmission member 420, a rocker arm 430, a main driving shaft 440, a driving plate 460 and a switch connecting rod 470. The driving arm 410 is hinged to the lower bracket 310 through the driving shaft. The two ends of the transmission member 420 are respectively hinged to the driving arm 410 and the rocker arm 430. One end of the rocker arm 430 away from the transmission member 420 is connected to the main driving shaft 440. One end of the driving plate 460 is connected to the main driving shaft 440, and the other end is hinged to the switch connecting rod 470. The driving shaft is also connected to a dynamic seal.

[0046] According to some embodiments of the present invention, referring to Figures 1 to 3 The slave driving assembly includes a slave driving shaft 450 , a driving plate 460 and a switch connecting rod 470 . One end of the driving plate 460 is connected to the slave driving shaft 450 , and the other end is hinged to the switch connecting rod 470 .

[0047] The movement process is as follows: when grounding is required, the dynamic seal is connected externally and then rotated to make the driving arm 410 rotate upward in the vertical plane in the left-right direction, and the transmission member 420 moves upward accordingly, driving the rocker arm 430 to swing upward in the vertical plane in the front-back direction, thereby driving the main driving shaft 440 to rotate clockwise, and the driving plate 460 swings clockwise together, thereby driving the switch connecting rod 470 to move forward, thereby driving the upper end of the lower isolating switch 320 to swing clockwise until the lower grounding static contact 330 is connected. At the same time, the linkage pull rod 480 moves upward, driving the slave driving shaft 450 to rotate clockwise, and the subsequent process is consistent with the above description. On the contrary, when the external circuit needs to be connected, the dynamic seal is rotated in the opposite direction to make the driving arm 410 move downward. The remaining actions are opposite to those described above and will not be repeated here.

[0048] A ring main unit according to an embodiment of the second aspect of the present invention has an air chamber as described above.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An air chamber, characterized in that: It includes a housing and the following components which are arranged in the housing from top to bottom: An upper isolation assembly, comprising an upper bracket, an upper isolation switch and an upper grounding static contact, wherein the upper isolation switch and the upper grounding static contact are both arranged on the upper bracket; Circuit breaker components; A lower isolation assembly, comprising a lower bracket, a lower isolation switch and a lower grounding static contact, wherein the lower isolation switch and the lower grounding static contact are both arranged on the lower bracket; A linkage drive mechanism, the upper end and the lower end of which are respectively connected to the upper isolating switch and the lower isolating switch, the linkage drive mechanism can drive the upper isolating switch and the lower isolating switch to rotate, and make the upper isolating switch connected to the upper grounding static contact while the lower isolating switch is connected to the lower grounding static contact; The upper isolation assembly further comprises an upper support plate for supporting an upper isolation static contact and an upper grounding static contact, the lower isolation assembly further comprises a lower support plate for supporting a lower isolation static contact and a lower grounding static contact, the circuit breaker assembly comprises a plurality of fixing plates, the upper support plate, the lower support plate and the fixing plate are all made of epoxy resin; The circuit breaker assembly further comprises a vacuum interrupter and an insulating pull rod connected to the vacuum interrupter, wherein the vacuum interrupter and the insulating pull rod are arranged in a horizontal direction; The linkage drive mechanism comprises a main drive assembly, a slave drive assembly and a linkage pull rod, wherein the main drive assembly is movably arranged on the lower bracket and connected to the lower isolating switch, the slave drive assembly is movably arranged on the upper bracket and movably connected to the upper isolating switch, and the two ends of the linkage pull rod are respectively connected to the main drive assembly and the slave drive assembly; The main drive assembly includes a drive arm, a transmission member, a rocker arm, a main drive shaft, a drive plate and a switch connecting rod. The drive arm is hinged to the lower bracket through the transmission shaft. The two ends of the transmission member are respectively hinged to the drive arm and the rocker arm. One end of the rocker arm away from the transmission member is connected to the main drive shaft. One end of the drive plate is connected to the main drive shaft, and the other end is hinged to the switch connecting rod. The transmission shaft is also connected to a dynamic seal.

2. An air chamber according to claim 1, characterized in that: The upper isolation assembly also includes an upper isolation static contact, the circuit breaker assembly includes an upper busbar and a lower busbar, one end of the upper isolation switch is connected to the upper busbar, the linkage drive mechanism can drive the other end of the upper isolation switch to connect to the upper isolation static contact, while the lower isolation switch is connected to the lower busbar, and the upper isolation static contact is used to connect to an external circuit.

3. An air chamber according to claim 2, characterized in that: It also includes an outlet terminal assembly, which includes a mounting plate and an outlet busbar arranged on the mounting plate. One end of the lower isolating switch is connected to the outlet busbar, and the other end is driven by the linkage drive mechanism to connect to the lower busbar or the lower grounding static contact.

4. An air chamber according to claim 2, characterized in that: The lower isolation assembly further includes a lower isolation static contact, which is connected to the lower busbar. The linkage drive mechanism can drive the lower isolation switch to connect to the lower isolation static contact.

5. The air chamber according to claim 1, characterized in that: The slave drive assembly comprises a slave drive shaft, a drive plate and a switch connecting rod. One end of the drive plate is connected to the slave drive shaft, and the other end is hinged to the switch connecting rod.

6. A ring main unit, characterized in that: A gas chamber as claimed in any one of claims 1 to 5.

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