Switching device
By setting up a front-to-back array of staggered grid plates in the arc-extinguishing chamber of the switchgear and creating a wiring gap above the stationary output line, the problems of difficult arc extinguishing and insufficient wiring space under high voltage are solved, achieving the effects of rapid arc extinguishing and convenient wiring.
Patent Information
- Application Number
- CN202520634119.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-04-07
AI Technical Summary
In high-voltage scenarios, existing switching devices have insufficient grids in the arc-extinguishing chamber, making it difficult to extinguish the arc quickly. At the same time, insufficient wiring space affects assembly efficiency.
The arc-extinguishing chamber employs a front-to-back array of first and second grid plates that are staggered vertically, increasing the number of stacked grid plates and forming a wiring gap above the stationary output line, thus optimizing the arc-extinguishing chamber structure for easier wiring.
It improves the efficiency of arc extinguishing, saves copper usage without increasing costs, simplifies wiring operations, and improves assembly efficiency.
Smart Images
Figure CN223743504U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of low-voltage apparatus, specifically relates to a switch device. BACKGROUND
[0002] The switch device can cut off the current in the power supply and distribution circuit to realize the disconnection of the circuit and protect the circuit and the electrical equipment. The switch device usually comprises a contact system, which comprises a moving contact and a static contact. The moving contact is in contact with or separated from the static contact after the moving contact is actuated, so that the switch device itself is turned on or turned off. As known in the industry, when the switch device is disconnected, an arc is generated between the moving contact and the static contact. The arc energy is relatively large, which causes great difficulty in disconnecting the switch device. Only when the arc is extinguished, the circuit can be disconnected. Therefore, an arc extinguishing chamber is usually provided in the switch device. The arc enters the arc extinguishing chamber under the combined action of magnetic blowing force and gas blowing force, is cut into a plurality of series short arcs by the grid piece, so that the arc voltage is increased and the arc is extinguished. The role of the arc extinguishing chamber in ensuring the safe operation of the electrical equipment is indisputable.
[0003] With the continuous development of new energy industry, the application scenarios of high-voltage equipment are more and more. In order to meet the market demand, the switch device itself needs to meet the requirement of higher voltage. As a functional component for extinguishing arc in the switch device, the arc extinguishing chamber needs to meet the requirement of higher voltage to be extinguished. Further, higher arc voltage is needed when the arc enters the grid piece group in the arc extinguishing chamber. Therefore, it is urgent to increase the number of stacked grid pieces to effectively increase the arc voltage, so that the arc is quickly extinguished.
[0004] The switch device is usually provided with a wiring terminal arranged on the switch end surface for electrical connection with the connecting line inside the switch device. When the user wires, the electric wire needs to be inserted into the connecting row from the upper end surface or the lower end surface and kept, and then the fixing operation is completed. The wiring operation space required by this method is relatively large. However, the space provided by the existing switch device for external wiring is limited, which affects the assembly efficiency.
[0005] In view of the above prior art, the applicant has made beneficial design, and the technical scheme to be introduced below is produced in this background. UTILITY MODEL CONTENTS
[0006] The utility model discloses a switch device, which adopts a first grid piece group and a second grid piece group in front and back array in the arc extinguishing chamber, and the second grid piece group is located above the first grid piece group, thereby increasing the number of stacked grid pieces. The above-mentioned arrangement forms a gap above the static outgoing line row, which is convenient for wiring and connecting the switch device with external conductors.
[0007] The utility model discloses a switch device, including contact system and being located the arc extinguishing chamber of contact system one side, contact system includes movable contact and static contact, the arc extinguishing chamber includes the casing, is equipped with first louver group and second louver group who sets up in front and back in the casing, first louver group with second louver group series connection, second louver group is located first louver group staggered top, the casing with first louver group and second louver group adapt to the stepped structure, and then form the wiring cavity for wiring in the top of the wiring part of static contact's outgoing line row.
[0008] In a specific embodiment of the utility model, the arc extinguishing chamber further comprises a movable arc guiding piece, an intermediate arc guiding piece and a static arc guiding piece, the movable arc guiding piece and the intermediate arc guiding piece are installed in the casing, the movable arc guiding piece is arranged towards the movable contact, one end of the intermediate arc guiding piece is matched with the first louver group, and the other end is matched with the second louver group, so that the first louver group and the second louver group are connected in series, and the static arc guiding piece is installed on the static contact and extends from the contact point of the static contact to the inside of the casing.
[0009] In another specific embodiment of the utility model, the arc extinguishing chamber further comprises a partition plate, the partition plate is arranged in the inside of the casing, the inner cavity of the casing is divided into a first inner cavity and a second inner cavity which are isolated, the first inner cavity is used for arranging the first louver group, and the second inner cavity is used for arranging the second louver group.
[0010] In still another specific embodiment of the utility model, the partition plate is integrally formed with the casing.
[0011] In still another specific embodiment of the utility model, the movable arc guiding piece and the static arc guiding piece cooperate to form an arc inlet of the arc extinguishing chamber, and the arc inlet is communicated with the first cavity.
[0012] In still another specific embodiment of the utility model, the intermediate arc guiding piece is located on the side of the arc inlet of the arc extinguishing chamber which is away from the contact system, and comprises a U-shaped end, a transition part and a matching part which are connected in sequence, the U-shaped end is arranged around the partition plate and matched with the top louver of the first louver group, and the transition part and the matching part are arranged in close contact with the inner wall of the casing, wherein the matching part extends to the bottom of the second louver group and is matched with the bottom louver of the second louver group.
[0013] In a further specific embodiment of this utility model, the movable arc-drawing plate includes a first mating part, a first transition part, a second transition part, and a second mating part connected in sequence. The second mating part mates with the top of the second grid plate group. The first transition part and the second transition part are attached to the top inner wall of the housing. The first mating part is configured as a V-shape and mates with the movable contact.
[0014] In a further specific embodiment of this utility model, the moving arc-guiding plate and the intermediate arc-guiding plate constitute the air inlet of the second inner cavity, which is connected to the first inner cavity.
[0015] In yet another specific embodiment of this utility model, the wiring cavity is located to the right of the first inner cavity and below the second inner cavity.
[0016] This invention employs a first and second grid plate group arranged in a front-to-back array and staggered vertically within the arc-extinguishing chamber. This increases the number of stacked grid plates, effectively improving the arc voltage and enabling the arc to be extinguished quickly. The shell of the arc-extinguishing chamber has a notch above the stationary output busbar to avoid connecting wires, facilitating the connection between the switchgear and external conductors. Furthermore, since there is no need to extend the length of the existing stationary output busbar, it saves copper usage and does not increase the cost of the switchgear. Attached Figure Description
[0017] Figure 1 This is a side view of the switching device described in this utility model;
[0018] Figure 2 This is a schematic diagram of the structure of the first grid plate group and the second grid plate group described in this utility model;
[0019] Figure 3 This is a schematic diagram of the internal side of the arc-extinguishing chamber described in this utility model;
[0020] Figure 4 This is a schematic diagram showing the internal arc gas flow direction of the arc-extinguishing chamber described in this utility model;
[0021] Figure 5 This is a schematic diagram of the structure of the first grid plate described in this utility model.
[0022] In the figure: 1. Contact system; 11. Moving contact; 12. Stationary contact; 2. Arc extinguishing chamber; 21. First grid plate group; 211. Top grid plate; 212. Cutting area; 213. Grid plate leg; 22. Second grid plate group; 221. Bottom grid plate; 23. Moving arc ignition plate; 231. First mating part; 232. First transition part; 233. Second transition part; 234. Second mating part; 24. Intermediate arc ignition plate; 241. U-shaped end; 242. Transition part; 243. Mating part; 25. Stationary arc ignition plate; 3. Rotating shaft; 4. Stationary cable outlet; 100. Housing; 101. First inner cavity; 102. Second inner cavity; 103. Wiring cavity; 200. Spacer plate. Detailed Implementation
[0023] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.
[0024] In the following description, all directional (or orientational) concepts involving up, down, left, right, front, and back refer to the position of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be construed as a special limitation on the technical solution provided by this utility model.
[0025] like Figure 1 As shown, the switching device includes a contact system 1, an arc-extinguishing chamber 2, and a rotating shaft 3. The contact system 1 includes a moving contact 11 and a stationary contact 12. The moving contact 11 is mounted on the rotating shaft 3, and the stationary contact 12 is fixedly mounted on the housing of the switching device. When the rotating shaft 3 rotates, it can drive the moving contact 11 to move, causing the moving contact 11 to contact or separate from the stationary contact 12, thereby realizing the closing and opening operation of the switching device.
[0026] See you later Figure 1 and combined Figure 2 The arc-extinguishing chamber 2 includes a housing 100, which serves as the outer shell of the arc-extinguishing chamber 2. Inside, a first grid plate group 21 and a second grid plate group 22 are arranged. In this embodiment, the first grid plate group 21 and the second grid plate group 22 each have grid plates arranged at linear intervals along the height direction. The first grid plate group 21 is located to the right of the contact system 1; the second grid plate group 22 is located to the right of the first grid plate group 21, and is offset from the first grid plate group 21 in the grid plate array direction, positioned above the first grid plate group 21. That is, the two are not staggered in the air outlet direction of the arc-extinguishing chamber 2. The first grid plate group 21 and the second grid plate group 22, with their front-to-back array and staggered vertical arrangement, increase the number of stacked grid plates, effectively increasing the arc voltage and enabling rapid arc extinguishing.
[0027] Figure 5 The first grid group 21 is shown in the schematic diagram. The first grid at the top of the first grid group 21 includes a cutting area 212 and a pair of grid legs 213 extending from both sides of the cutting area 212 in the length direction, and the pair of grid legs 213 are configured as a pull arc gap, and the pull arc gap is open to the side away from the second grid group 22. Generally, the pull arc gap is offset, and when the offset directions of the cutting areas of adjacent grids are different, the pull arc gap can lengthen the arc, facilitating arc extinction.
[0028] As shown in Figure 3 and Figure 4 , the arc extinguishing chamber 2 further includes a partition plate 200, and the partition plate 200 is arranged in the shell 100 to form a first inner cavity 101 and a second inner cavity 102 which are isolated from each other in the shell 100, wherein the first inner cavity 101 is located below the partition plate 200 and is used to accommodate the first grid group 21, and the second inner cavity 102 is located on the right side above the partition plate 200 and is used to accommodate the second grid group 22.
[0029] A first gas hole is formed on the side of the shell 100 corresponding to the first inner cavity 101 and away from the contact system 1, for gas outlet of the first inner cavity 101, and similarly, a second gas hole is also formed on the side of the shell 100 corresponding to the second inner cavity 102 and away from the contact system 1, for gas outlet of the second inner cavity 102. Preferably, the second gas hole is only distributed in the area away from the stationary contact 12. Of course, a gas channel can also be constructed, in which case the gas in the second inner cavity 102 is guided upward and discharged through the first gas hole, so that the second gas hole is not needed.
[0030] Since the first inner cavity 101 is matched with the position of the first grid group 21, and at the same time, the second inner cavity 102 is matched with the position of the second grid group 22, and the second grid group 22 is arranged staggered in front of and behind and above and below the first grid group 21, therefore, the shape of the shell 100 is also relatively stepped. In this embodiment, the partition plate 200 extends horizontally above the first grid group 21 at the stepped corner of the shell 100.
[0031] More specifically, the partition plate 200 is integrally formed with the shell 100. When the shell 100 is composed of two front and rear half shells, the partition plate 200 can also be divided into two parts, which are arranged on the two half shells respectively; or the partition plate 200 is arranged on one of the half shells.
[0032] Continued from Figure 1 ,Figure 2 and Figure 3 The arc-extinguishing chamber 2 further comprises a moving arc blade 23, an intermediate arc blade 24 and a static arc blade 25, wherein the moving arc blade 23 and the intermediate arc blade 24 are installed in the shell 100, and the static arc blade 25 is installed on the static contact 12 and extends from the contact point of the static contact 12 to the inside of the shell 100. The moving arc blade 23 and the static arc blade 25 cooperate to form the arc inlet of the arc-extinguishing chamber 2.
[0033] Further, the moving arc blade 23 comprises a first matching part 231, a first transition part 232, a second transition part 233 and a second matching part 234 connected in sequence, wherein the second matching part 234 is located at the top of the second grid group 22, the first transition part 232 and the second transition part 233 are attached to the inner wall of the top of the shell 100, and the first matching part 231 is configured in a V shape and is arranged above the arc drawing gap of the first grid group 21 and cooperates with the moving contact 11.
[0034] The intermediate arc blade 24 comprises a U-shaped end 241, a transition part 242 and a matching part 243 connected in sequence, wherein the intermediate arc blade 24 is located on the side of the arc inlet of the arc-extinguishing chamber 2 away from the contact system 1. The U-shaped end 241 is arranged around the partition plate 200 and cooperates with the top grid 211 of the first grid group 21. The transition part 242 and the matching part 243 are attached to the inner wall of the shell 100, wherein the matching part 243 extends to the bottom of the second grid group 22 and cooperates with the bottom grid 221 of the second grid group 22, thereby connecting the first grid group 21 and the second grid group 22 in series. The series means that a conductive part is used to connect the two ends of the two grid groups, that is, one end of the conductive part extends to one end of the first grid group, and the other end of the conductive part extends to one end of the second grid group, so that the arc entering the first grid group and the second grid group is in a series form. In this embodiment, the U-shaped end 241 is configured in a U shape, and of course a flat plate can also be used.
[0035] Continuing to see Figure 3 and Figure 4 The moving arc blade 23 and the intermediate arc blade 24 form the gas inlet opening of the second inner cavity 102. As can be seen from Figure 4 , after the arc gas enters the inside of the arc-extinguishing chamber 2 from the arc inlet formed by the moving arc blade 23 and the static arc blade 25, one part directly enters the first inner cavity 101 and then enters the first grid group 21, and the other part enters the second inner cavity 102 through the gas inlet opening formed by the moving arc blade 23 and the intermediate arc blade 24 and then enters the second grid group 22.
[0036] Continued to see Figure 1 , the shell 100 in the first inner cavity 101 outside the second inner cavity 102 below the formation of the shape of the wiring cavity 103, and the wiring cavity 103 in the switch static out line row 4 overlap the top of the static out line row 4 of the wiring to avoid, so as to facilitate the switch and the external bus bar overlap. This kind of setting, without extending the length of the existing static out line row 4, can save the amount of copper, do not increase the cost of switch.
Claims
1. A switchgear comprising a contact system (1) and an arc-extinguishing chamber (2) located on one side of the contact system (1), the contact system (1) comprising a moving contact (11) and a stationary contact (12); the arc-extinguishing chamber (2) comprising a housing (100), a first set of louver plates (21) and a second set of louver plates (22) arranged in front and back of the housing (100), the first set of louver plates (21) and the second set of louver plates (22) being connected in series, characterized in that: The second grid group (22) is located above the first grid group (21) in a staggered manner, the shell (100) is adapted to the first grid group (21) and the second grid group (22) in a stepped structure, and a wire cavity (103) for wire accommodation is formed above the wire connection part of the outgoing line row (4) of the static contact (12).
2. A switchgear according to claim 1, characterized in that: The arc extinguishing chamber (2) further comprises a moving arc guiding piece (23), an intermediate arc guiding piece (24) and a static arc guiding piece (25), the moving arc guiding piece (23) and the intermediate arc guiding piece (24) are installed in the shell (100), the moving arc guiding piece (23) is arranged towards the moving contact (11), one end of the intermediate arc guiding piece (24) is matched with the first grid group (21), and the other end is matched with the second grid group (22), so that the first grid group (21) and the second grid group (22) are connected in series, and the static arc guiding piece (25) is installed on the static contact (12) and extends from the contact point of the static contact (12) to the inside of the shell (100).
3. A switchgear according to claim 2, characterised in that: The arc extinguishing chamber (2) further comprises a partition plate (200), the partition plate (200) is arranged in the inside of the shell (100), the inner cavity of the shell (100) is divided into a first inner cavity (101) and a second inner cavity (102) which are isolated from each other, the first inner cavity (101) is used for arranging the first grid group (21), and the second inner cavity (102) is used for arranging the second grid group (22).
4. A switchgear according to claim 3, characterised in that: The partition plate (200) is integrally formed with the shell (100).
5. A switchgear according to claim 3, characterised in that: The moving arc guiding piece (23) and the static arc guiding piece (25) are matched to form an arc inlet of the arc extinguishing chamber (2), and the arc inlet is communicated with the first cavity (101).
6. A switchgear according to claim 5, characterised in that: The intermediate arc guiding piece (24) is located on the side, away from the contact system (1), of the arc inlet of the arc extinguishing chamber (2) and comprises a U-shaped end (241), a transition part (242) and a matching part (243) which are connected in sequence, the U-shaped end (241) is arranged around the partition plate (200) and matched with the top grid piece (211) of the first grid group (21), and the transition part (242) and the matching part (243) are arranged in adhesion to the inner wall of the shell (100), wherein the matching part (243) extends to the bottom of the second grid group (22) and is matched with the bottom grid piece (221) of the second grid group (22).
7. A switchgear according to claim 2, characterized in that: The moving arc guiding piece (23) comprises a first matching part (231), a first transition part (232), a second transition part (233) and a second matching part (234) which are connected in sequence, the second matching part (234) is matched with the top of the second grid group (22), the first transition part (232) and the second transition part (233) are in adhesion to the top inner wall of the shell (100), and the first matching part (231) is formed in a V shape and matched with the moving contact (11).
8. A switchgear according to claim 3, characterized in that: The moving arc piece (23) and the intermediate arc piece (24) constitute an air inlet opening of the second inner cavity (102), which communicates with the first inner cavity (101).
9. A switchgear according to claim 3, characterized in that: The wiring cavity (103) is located outside the first inner cavity (101) and below the second inner cavity (102).