Outdoor permanent-magnet vacuum circuit breaker

Abstract

The utility model relates to outdoor vacuum circuit breaker technical field provides an outdoor permanent -magnetic vacuum circuit breaker, including mechanism box, baffle and mounting mechanism, mechanism box inside fixedly be provided with three mounting brackets, and mounting bracket is used to install vacuum arc extinguish chamber, baffle is provided with two and is located between two adjacent mounting brackets respectively, and baffle is detachably connected on the bottom surface inside mechanism box through mounting mechanism. The utility model can play the role of the barrier to the creeping loop produced between the different phase circuits through the baffle, reduces the risk of phase-to-phase creeping due to condensation in the circuit breaker.

Description

Technical Field

[0001] This application relates to the field of outdoor vacuum circuit breaker technology, and more particularly to an outdoor permanent magnet vacuum circuit breaker. Background Technology

[0002] A permanent magnet vacuum circuit breaker is a high-voltage switchgear that integrates a permanent magnet operating mechanism and a vacuum interrupter. The permanent magnet operating mechanism is different from the traditional spring operating mechanism. It uses the constant magnetic field generated by the permanent magnet to interact with the electromagnetic field generated by the energization of the opening / closing coil, which drives the moving iron core to move the moving contact of the vacuum interrupter to the closing or opening position, and uses the permanent magnet force to hold it in that position.

[0003] Outdoor permanent magnet vacuum circuit breakers need to operate in relatively complex external environments. When the circuit breaker is in an environment with low temperature and high humidity, the humid and cold air outside the circuit breaker mechanism box may enter the interior of the mechanism box through various gaps. Then, after being heated by the energized components inside the circuit breaker, the temperature rises. When this humid and hot air flows to the mechanism box shell, the moisture inside the humid and hot air will condense on the inner wall of the shell due to the low temperature of the mechanism box shell, forming conductive water droplets. This poses a risk of inter-phase creepage between different phase circuits of the circuit breaker. Utility Model Content

[0004] This application provides an outdoor permanent magnet vacuum circuit breaker, which can improve the technical problem of phase-to-phase creepage caused by condensation inside the circuit breaker mechanism box in related technologies.

[0005] This application provides an outdoor permanent magnet vacuum circuit breaker, including: a mechanism box, The mechanism box contains three mounting brackets for mounting vacuum interrupters. There are two partitions located between two adjacent mounting brackets. The partitions are detachably connected to the bottom surface inside the mechanism box via the mounting mechanism.

[0006] The technical solutions described in this application embodiment have at least the following technical effects: the partition can block the generation of creepage loops between different phase circuits, reducing the risk of inter-phase creepage caused by condensation inside the circuit breaker.

[0007] In some embodiments, an opening is provided on the side wall of the mechanism box, and a sliding groove is provided on the bottom surface inside the mechanism box. One side of the partition is slidably connected inside the sliding groove, and one end of the partition is inserted into the opening. The mounting mechanism is disposed on the outer surface of the mechanism box and is used to block the opening to fix the partition.

[0008] In some embodiments, the mounting mechanism includes a sealing plate and a locking assembly; one side of the sealing plate is hinged to the outer surface of the mechanism housing, and the side of the sealing plate near the partition abuts against the outer surface of the mechanism housing and the partition; the locking assembly is disposed on the sealing plate and the mechanism housing for locking the position of the sealing plate.

[0009] In some embodiments, the locking assembly includes a first locking bar, a second locking bar, and a pin; the first locking bar is fixedly disposed on the sealing plate, the second locking bar is fixedly disposed on the outer surface of the mechanism box, and the pin passes through the first locking bar and the second locking bar.

[0010] In some embodiments, an annular sealing groove is formed on the outer surface of the mechanism box, and a sealing ring is provided inside the annular sealing groove. The side of the sealing plate near the partition abuts against the sealing ring.

[0011] In some embodiments, a clamping groove is provided on one end of the partition near the opening, and a clamping strip is fixedly provided inside the clamping groove. Attached Figure Description

[0012] Figure 1 This application provides a schematic diagram of the overall structure of an outdoor permanent magnet vacuum circuit breaker. Figure 2 for Figure 1 Enlarged view of section A in the middle; Figure 3 for Figure 1 Enlarged view of section B; Figure 4 An assembly drawing of the partition provided in the embodiments of this application; Figure 5 for Figure 4 Enlarged view of section C.

[0013] The following are the labeling elements in the figure: 1. Mechanism box; 11. Opening; 12. Slide groove; 13. Annular sealing groove; 14. Sealing ring; 2. Partition plate; 21. Clamping groove; 22. Clamping bar; 3. Sealing plate; 4. Mounting bracket; 5. Locking assembly; 51. First locking bar; 52. Second locking bar; 53. Pin. Detailed Implementation

[0014] Outdoor permanent magnet vacuum circuit breakers need to operate in relatively complex external environments. When the circuit breaker is in an environment with low temperature and high humidity, the humid and cold air outside the circuit breaker mechanism box may enter the interior of the mechanism box through various gaps. Then, after being heated by the energized components inside the circuit breaker, the temperature rises. When this humid and hot air flows to the mechanism box shell, the moisture inside the humid and hot air will condense on the inner wall of the shell due to the low temperature of the mechanism box shell, forming conductive water droplets. This poses a risk of inter-phase creepage between different phase circuits of the circuit breaker.

[0015] Based on this, in order to improve the problem of phase-to-phase creepage caused by condensation inside the circuit breaker mechanism box in related technologies, the embodiments of this application provide the following solutions.

[0016] The following combination Figures 1-5 This application will be described in further detail.

[0017] This embodiment discloses an outdoor permanent magnet vacuum circuit breaker: including a mechanism box 1, a partition 2, and an installation mechanism; three mounting brackets 4 are fixedly installed inside the mechanism box 1, and the mounting brackets 4 are used to install vacuum interrupters; two partitions 2 are provided and are respectively located between two adjacent mounting brackets 4; the partitions 2 are detachably connected to the bottom surface inside the mechanism box 1 through the installation mechanism.

[0018] As can be seen from the above, the outdoor permanent magnet vacuum circuit breaker provided in this application embodiment has a partition 2 made of plastic or other materials with low thermal conductivity. When conditions conducive to condensation occur inside and outside the mechanism box 1, one side of the shell of the mechanism box 1 is in contact with the cold air outside, thereby keeping the shell of the mechanism box 1 at a lower temperature. Since the partition 2 is located inside the mechanism box 1 and has a low thermal conductivity, the partition 2 can maintain a higher temperature relative to the shell of the mechanism box 1. The humid hot air inside the mechanism box 1 is less likely to condense due to rapid cooling after contacting the partition 2. When a small amount of water droplets condense on the partition 2, these water droplets will flow along the surface of the partition 2 to the bottom of the inner wall of the mechanism box 1 under the action of gravity, thereby avoiding the formation of continuous water marks on the partition 2. Therefore, when a large amount of water droplets condense on the bottom surface of the inner wall of the mechanism box 1, the partition 2 can prevent these water droplets from forming continuous water marks between different phase circuits, thereby preventing the generation of creepage circuits between different phase circuits and reducing the risk of interphase creepage caused by condensation inside the circuit breaker.

[0019] In some embodiments, please refer to the following: Figures 1 to 5 An opening 11 is provided on the side wall of the mechanism box 1, and a sliding groove 12 is provided on the bottom surface inside the mechanism box 1. One side of the partition 2 is slidably connected to the inside of the sliding groove 12, and one end of the partition 2 is inserted into the opening 11. The mounting mechanism is set on the outer surface of the mechanism box 1 and is used to block the opening 11 to fix the partition 2.

[0020] With this setup, after long-term operation of the circuit breaker, a lot of dust may accumulate on the surface of the partition 2. The dust will make the surface of the partition 2 more susceptible to moisture absorption and will also enhance the conductivity of the moisture condensed on the partition 2, thereby increasing the risk of creepage on both sides of the partition 2. Therefore, the staff can clean the partition 2 regularly. First, remove the sealing of the opening 11 by the installation mechanism, then pull the partition 2 out of the mechanism box 1 so that the partition 2 slides along the slide groove 12 and is finally removed from the inside of the mechanism box 1. Then, clean and dry the surface of the partition 2, and then insert the partition 2 through the opening 11 into the inside of the mechanism box 1 and seal the opening 11 by the installation mechanism to fix the partition 2.

[0021] Optionally, in some embodiments, please refer to Figures 1 to 3 The installation mechanism includes a sealing plate 3 and a locking component 5; one side of the sealing plate 3 is hinged to the outer surface of the mechanism box 1, and the side of the sealing plate 3 near the partition 2 abuts against the outer surface of the mechanism box 1 and the partition 2; the locking component 5 is provided on the sealing plate 3 and the mechanism box 1 and is used to lock the position of the sealing plate 3.

[0022] With this configuration, after the sealing plate 3 abuts against the outer surface of the mechanism box 1 and the position of the sealing plate 3 is locked by the locking component 5, the partition 2 is fixed inside the mechanism box 1 by the sealing plate 3. At the same time, the sealing plate 3 seals the opening 11 to prevent air from outside the mechanism box 1 from entering the interior of the mechanism box 1 through the opening 11. When it is necessary to remove the partition 2, the locking component 5 is released from locking the position of the sealing plate 3, and then the sealing plate 3 is rotated to separate it from the outer surface of the mechanism box 1 and the partition 2, at which point the partition 2 can be removed. When it is necessary to fix the partition 2 again, the sealing plate 3 is rotated to abut against the outer surface of the mechanism box 1 again, and then the position of the sealing plate 3 is locked by the locking component 5.

[0023] Optionally, please refer to Figure 1 and Figure 2 The locking component 5 includes a first locking bar 51, a second locking bar 52, and a pin 53; the first locking bar 51 is fixedly disposed on the sealing plate 3, the second locking bar 52 is fixedly disposed on the outer surface of the mechanism box 1, and the pin 53 passes through the first locking bar 51 and the second locking bar 52.

[0024] With this configuration, when the sealing plate 3 closes the opening 11, the pin 53 is inserted between the first locking bar 51 and the second locking bar 52. When the sealing plate 3 and the first locking bar 51 tend to rotate away from the partition 2, the second locking bar 52 blocks the pin 53 from moving, and the pin 53 blocks the first locking bar 51 and the sealing plate 3 from moving, thereby locking the sealing plate 3 in position and closing the opening 11. When it is necessary to rotate the sealing plate 3, the pin 53 is pulled out from between the first locking bar 51 and the second locking bar 52, and then the sealing plate 3 can be rotated.

[0025] In some embodiments, please refer to Figure 1 and Figure 3 An annular sealing groove 13 is provided on the outer surface of the mechanism box 1, and a sealing ring 14 is provided inside the annular sealing groove 13. The side of the sealing plate 3 near the partition plate 2 abuts against the sealing ring 14.

[0026] With this configuration, when the sealing plate 3 closes the opening 11, the sealing plate 3 abuts against the sealing ring 14 and compresses the sealing ring 14, forming a seal between the sealing plate 3 and the sealing ring 14, which can enhance the sealing effect of the sealing plate 3 on the opening 11. At the same time, the sealing ring 14 will exert a pushing force on the sealing plate 3, causing the sealing plate 3 and the first locking strip 51 to tend to rotate away from the partition 2, thereby pressing the first locking strip 51 to press the pin 53 onto the second locking strip 52, preventing the sealing plate 3 from slightly shaking due to gaps between the three, and enhancing the locking effect of the locking assembly 5 on the sealing plate 3.

[0027] Optionally, in some embodiments, please refer to Figure 1 and Figure 3 A clamping groove 21 is provided on one end of the partition 2 near the opening 11, and a clamping strip 22 is fixedly provided inside the clamping groove 21.

[0028] With this setup, when it is necessary to remove the partition 2, the staff can use a tool to clamp or hook the clamping bar 22, and then pull the clamping bar 22 outward from the mechanism box 1. The clamping bar 22 can then pull out the partition 2, making it convenient for the staff to remove the partition 2.

[0029] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An outdoor permanent magnet vacuum circuit breaker, characterized in that, include: The mechanism box (1) has three mounting brackets (4) fixedly installed inside it. The mounting brackets (4) are used to install the vacuum interrupter. Two partitions (2) are provided and are respectively located between two adjacent mounting brackets (4); as well as The mounting mechanism is used to detachably connect the partition (2) to the bottom surface inside the mechanism box (1).

2. An outdoor permanent magnet vacuum circuit breaker according to claim 1, characterized in that: An opening (11) is provided on the side wall of the mechanism box (1), and a sliding groove (12) is provided on the bottom surface inside the mechanism box (1). One side of the partition (2) is slidably connected inside the sliding groove (12), and one end of the partition (2) is inserted into the opening (11). The mounting mechanism is provided on the outer surface of the mechanism box (1) and is used to seal the opening (11) to fix the partition (2).

3. An outdoor permanent magnet vacuum circuit breaker according to claim 2, characterized in that: The installation mechanism includes a sealing plate (3) and a locking component (5); one side of the sealing plate (3) is hinged to the outer surface of the mechanism box (1), and the side of the sealing plate (3) near the partition (2) abuts against the outer surface of the mechanism box (1) and the partition (2); the locking component (5) is disposed on the sealing plate (3) and the mechanism box (1) for locking the position of the sealing plate (3).

4. An outdoor permanent magnet vacuum circuit breaker according to claim 3, characterized in that: The locking assembly (5) includes a first locking bar (51), a second locking bar (52), and a pin (53); the first locking bar (51) is fixedly disposed on the sealing plate (3), the second locking bar (52) is fixedly disposed on the outer surface of the mechanism box (1), and the pin (53) passes through the first locking bar (51) and the second locking bar (52).

5. An outdoor permanent magnet vacuum circuit breaker according to claim 4, characterized in that: An annular sealing groove (13) is provided on the outer surface of the mechanism box (1), and a sealing ring (14) is provided inside the annular sealing groove (13). The side of the sealing plate (3) near the partition (2) abuts against the sealing ring (14).

6. An outdoor permanent magnet vacuum circuit breaker according to claim 2, characterized in that: The partition (2) has a clamping groove (21) on one end near the opening (11), and a clamping strip (22) is fixedly installed inside the clamping groove (21).

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