An arc extinguishing cover of a vehicle-mounted DC high-speed circuit breaker
A high-speed circuit breaking and arc extinguishing technology, applied in the arc extinguishing field, can solve the problems of increasing the possibility of metal grid connection, short service life, limited installation space, etc., achieving easy scale, convenient installation and maintenance, The effect of fast arc extinguishing
Active Publication Date: 2017-10-03
广州本固电气设备有限公司 +1
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Problems solved by technology
[0003] However, the arc chute of the existing vehicle-mounted DC high-speed circuit breaker mainly has the following problems: (1) it requires a large installation space and is very inconvenient to install; for example: a kind of subway, The DC fast circuit breaker for light rail traction, its arc extinguishing cover includes an arc shield and a metal grid, and the metal grid is placed on the arc shield and stacked on the bottom plate in turn and fixed by bolts; because the vehicle-mounted DC high-speed circuit breaker emits The arc is sprayed to the surroundings. In order to prevent the short circuit caused by the arc, the front and rear distances and the left and right distances of the vehicle-mounted DC high-speed circuit breaker are required to be above the specified insulation distance, so that a large installation space is required. The traction drive system is generally installed on the bottom or roof of the vehicle, and its installation space is very limited, so it cannot ideally meet the requirements for the use of DC high-speed circuit breakers in the traction drive system of rail transit vehicles; (2) The service life is short, such as: In the DC fast circuit breaker described in the patent application number 200720070517.3, the metal grids are placed on the arc barrier and superimposed on the bottom plate in turn, and the arc barrier has openings of exactly the same size, so that adjacent metal grids The area of the inter-arc is exactly the same, so that it is easy to produce a superposition effect, which increases the possibility of melting and connecting two adjacent metal grids, thus greatly shortening the service life of the arc chute
Method used
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[0034] Such as figure 1 As shown: the arc extinguishing cover of a vehicle-mounted DC high-speed circuit breaker provided by this embodiment is spliced by two arc extinguishing units 1a and 1b arranged symmetrically in left and right mirror images, and a closed top plate 3 is provided on the top, thus forming only Arc chute open on left and right sides.
[0035] to combine Figure 2 to Figure 4As shown: the arc extinguishing cover of a vehicle-mounted DC high-speed circuit breaker provided by this embodiment includes two arc extinguishing units 1a, 1b symmetrically arranged in left and right mirror images, two arc guide parts 2a, 2b arranged symmetrically in front and rear, and several devices The deionization plate 14 with openings and several arc extinguishing grids 15 with openings are provided with several transverse slots 16 on the inner walls of the two panels 11a, 11b, and the transverse slots 16 are arranged on the two panels 11a, 11b. A one-to-one correspondence i...
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The invention discloses a vehicle-mounted direct current high-speed circuit breaker arc chute which comprises two arc extinguishing units in left and right mirror symmetry and two arc guide parts in forward-backward symmetry. Each arc extinguishing unit comprises two panels in forward-backward symmetry, an upper connector, a lower connector, a number of deionized plates and an arc extinguishing grid plate. A number of transverse clamp slots are arranged on the inner walls of two panels. The deionized plates and the arc extinguishing grid plates are successively and alternately placed in the transverse clamp slots. Two arc extinguishing units are spliced together through the connection of the arc guide parts and corresponding panels. A closed roof is arranged at the top of the spliced body formed by two arc extinguishing units, and the arc chute with open left and right sides is formed. According to the invention, compared with the prior art, the installation space of the arc chute is reduced nearly 60%; the arc chute has the advantages of fast arc extinguishing speed, convenient processing, installation and maintenance, low cost, easy large-scale production; and stringent application requirements can be met.
Description
technical field [0001] The invention relates to an arc extinguishing cover of a vehicle-mounted DC high-speed circuit breaker, and belongs to the technical field of DC circuit breakers. Background technique [0002] At present, DC high-speed circuit breakers are widely used in the traction system of rail transit, such as light rail, subway and tram. The arc extinguisher plays a vital role in the DC high-speed circuit breaker. It makes the arc generated by the DC high-speed circuit breaker contact with the solid medium, thereby reducing the arc temperature and accelerating the extinguishment of the arc, so as to ensure the safety of the DC high-speed circuit breaker. run. [0003] However, the arc chute of the existing vehicle-mounted DC high-speed circuit breaker mainly has the following problems: (1) it requires a large installation space and is very inconvenient to install; for example: a kind of subway, The DC fast circuit breaker for light rail traction, its arc exting...
Claims
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IPC IPC(8): H01H33/04H01H9/30
CPCH01H9/30H01H33/04
Inventor方敏杨崇清董斌
Owner广州本固电气设备有限公司