Flash barrier mounting structure

Abstract

The utility model provides a flash barrier mounting structure. The flash barrier mounting structure comprises a protective cover, a secondary wiring terminal group and a flash barrier, and the secondary wiring terminal group is assembled on the terminal mounting plate of the protective cover through the upper mounting feature and the lower mounting feature. And the flash barrier is assembled on the inner side of the top plate of the protective cover. And the upper mounting characteristic of the secondary wiring terminal group passes through the terminal mounting plate of the protective cover to support the flash barrier. And supporting legs are arranged on the protective cover to support the flash barrier. The upper mounting characteristic of the secondary wiring terminal group is used for mounting the secondary wiring terminal group and also used as the mounting and supporting characteristic of the flash barrier, so that the mounting of the flash barrier is effectively simplified.

Description

Technical Field

[0001] The invention relates to a low-voltage circuit breaker, in particular to a mounting structure of an arc isolation plate of the low-voltage circuit breaker. Background Art

[0002] When a low-voltage circuit breaker interrupts a fault current, hot metal particles fly out of the arc-extinguishing chamber exhaust port. To prevent damage to the equipment caused by these particles, a protective cover is typically installed above the arc-extinguishing chamber exhaust port. The protective cover is typically made of metal. To prevent electrical conduction between the hot metal particles and the metal cover, an arc-isolating plate made of electrically insulating material must be installed on the top inner side of the cover. Traditional installation methods require the arc-isolating plate to be attached to the top inner side of the cover using multiple rivets or screws, resulting in complex and inefficient processing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a mounting structure that can simplify the installation of arc isolation plates, so as to solve the problem of reliable and simple installation of arc isolation plates of a protective cover of a low-voltage circuit breaker.

[0004] To achieve the above objectives, the present invention provides an arc-isolating plate mounting structure comprising a protective cover, a secondary terminal assembly, and an arc-isolating plate. The secondary terminal assembly is mounted to the terminal mounting plate of the protective cover via upper and lower mounting features. The arc-isolating plate is mounted on the inner side of the top plate of the protective cover. The upper mounting features of the secondary terminal assembly extend through the terminal mounting plate of the protective cover to support the arc-isolating plate. Support legs are provided on the protective cover to support the arc-isolating plate.

[0005] Furthermore, the top of the protective cover is provided with a top plate, which is bent forward to form a terminal mounting plate, and is bent backward to form a ventilation plate. The terminal mounting plate is provided with an upper mounting hole near the top plate, and the upper mounting hole is a through hole. The ventilation plate is provided with support legs, which are bent and positioned close to the top plate.

[0006] Furthermore, a mounting seat is provided on a side of the secondary terminal assembly close to the protective cover, and a protruding upper mounting feature is provided on the mounting seat, and the upper mounting feature is coupled to the upper mounting hole of the protective cover.

[0007] Furthermore, the length of the support leg is greater than or equal to one quarter of the length of the arc isolation plate, and the distance between the support leg and the top plate is slightly greater than the thickness of the arc isolation plate.

[0008] Furthermore, the distance between the terminal mounting plate and the top plate through which the upper mounting feature passes through the protective cover is slightly greater than the thickness of the arc isolation plate.

[0009] The technical effect of the present invention is that the installation features of the secondary terminal group also serve as the installation support features of the arc isolation plate, eliminating multiple rivets or screws in the traditional assembly method, effectively simplifying the installation of the arc isolation plate, and cooperating with the support feet of the protective cover to ensure reliable installation support of the arc isolation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of an arc isolation plate fixing structure involved in the present invention.

[0011] Figure 2 This is a schematic diagram of the forward structure of the top plate of an arc isolation plate fixing structure involved in the present invention.

[0012] Figure 3 This is a schematic diagram of the back structure of the top plate of an arc isolation plate fixing structure involved in the present invention.

[0013] Figure 4 This is a structural diagram of a secondary terminal group of an arc isolation plate fixing structure involved in the present invention.

[0014] Figure 5 This is a cross-sectional view of an arc isolation plate fixing structure involved in the present invention DETAILED DESCRIPTION

[0015] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0016] Marking Description:

[0017] Protective cover 1 , top plate 101 , ventilation plate 102 , ventilation holes 1021 , support legs 1022 , terminal mounting plate 103 , upper mounting holes 1031 , lower mounting holes 1032 , and slots 1033 .

[0018] Secondary terminal group 2, mounting base 201, upper mounting feature 2011, lower mounting feature 2012, buckle 2013, terminal 202.

[0019] Arc isolation plate 3.

[0020] Figure 1As shown, an arc isolation plate installation structure of the present invention includes a protective cover 1, a secondary terminal group 2 and an arc isolation plate 3. The protective cover 1 is installed above the exhaust port of the arc extinguishing chamber of the low-voltage circuit breaker to prevent the damage to the equipment caused by flying high-temperature metal particles. The low-voltage circuit breaker is not drawn in the present invention. Generally, the electric operating mechanism, closing electromagnet, shunt release, normally open and normally closed contacts and controller-related signal input and output of the low-voltage circuit breaker are used for remote communication and control facilities and are concentrated through the secondary terminal group 2 for customer connection. For the convenience of installation and deployment, the secondary terminal group 2 is installed on the protective cover 1.

[0021] Figure 2 and Figure 3 The figure shows the protective cover 1 of the present invention. Above the protective cover 1 is a top plate 101. The protective cover 1 is bent forward to form a terminal mounting plate 103 for mounting the secondary terminal group 2. The terminal mounting plate 103 is provided with an upper mounting hole 1031 near the top plate 101, a lower mounting hole 1032 away from the top plate 101, and a card slot 1033 in the middle. The upper mounting hole 1031, the lower mounting hole 1032 and the card slot 1033 are through holes. The protective cover 1 is bent backward to form a ventilation plate 102. The ventilation plate 102 is provided with a plurality of ventilation holes 1021 for ventilation and heat dissipation of the low-voltage circuit breaker. The ventilation plate 102 is also provided with at least one supporting foot 1022. After being bent, the supporting foot 1022 is close to the top plate 101. Figure 5 As shown, after the support leg 1022 is bent, the length S of the support leg 1022 is greater than or equal to one-fourth of the length L of the arc isolation plate 3. The distance between the support leg 1022 and the top plate 101 is slightly greater than the thickness P of the arc isolation plate 3 to ensure that the arc isolation plate 3 does not fall out after installation.

[0022] Figure 4 Figure 2 shows the secondary terminal assembly 2 according to the present invention. A mounting base 201 is provided on the side of the secondary terminal assembly 2 near the protective cover 1. Mounting base 201 is provided with a protruding upper mounting feature 2011, a lower mounting feature 2012, and a latch 2013. The upper mounting feature 2011 mates with the upper mounting hole 1031 of the protective cover 1, the lower mounting feature 2012 mates with the lower mounting hole 1032 of the protective cover 1, and the latch 2013 mates with the latch slot 1033 of the protective cover 1. Figure 5 As shown, the upper mounting feature 2011 and the lower mounting feature 2012 of the secondary terminal group 2 pass through the terminal mounting plate 103 of the protective cover 1 and are assembled on the terminal mounting plate 103 of the protective cover 1. The buckle 2013 enters the slot 1033 of the protective cover 1 to fix the secondary terminal group 2 on the protective cover 1.

[0023] In particular, Figure 5As shown, the upper mounting feature 2011 of the secondary terminal assembly 2 passes through the terminal mounting plate 103 of the protective cover 1, extending beyond the protective cover 1 by a distance Q. The distance between the upper mounting feature 2011 and the top plate 101 is slightly greater than the thickness P of the arc isolation plate 3. The upper mounting feature 2011 passes through the terminal mounting plate 103 of the protective cover 1 to support the arc isolation plate 3, allowing the arc isolation plate 3 to be placed on the top plate 101 inside the protective cover 1.

[0024] On the other side of the secondary terminal block 2, several terminal blocks 202 can be installed as needed, allowing the customer to selectively connect to remote communication and control facilities. The upper mounting features 2011 of the secondary terminal block 2 serve both as mounting elements for the secondary terminal block 2 and as mounting supports for the arc shield 3. This eliminates the need for multiple rivets or screws in traditional assembly methods, effectively simplifying the installation of the arc shield 3. Together with the support feet 1022 of the protective cover 1, this ensures reliable mounting and support for the arc shield 3.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the scope of protection of the present invention. Any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the spirit and scope of the present invention by using the technical content disclosed above are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An arc isolation plate installation structure, comprising a protective cover (1), a secondary terminal group (2) and an arc isolation plate (3); The secondary terminal group (2) is assembled on the terminal mounting plate (103) of the protective cover (1) through an upper mounting feature (2011) and a lower mounting feature (2012); the arc isolation plate (3) is assembled on the inner side of the top plate (101) of the protective cover (1); It is characterized by: The upper mounting feature (2011) of the secondary terminal group (2) passes through the terminal mounting plate (103) of the protective cover (1) to support the arc isolation plate (3); and a supporting foot (1022) is provided on the protective cover (1) to support the arc isolation plate (3).

2. The arc isolation plate installation structure according to claim 1, characterized in that: The top of the protective cover (1) is a top plate (101); the protective cover (1) is bent forward to form a terminal mounting plate (103); the protective cover (1) is bent backward to form a ventilation plate (102); The terminal mounting plate (103) is provided with an upper mounting hole (1031) near the top plate (101); the upper mounting hole (1031) is a through hole; The ventilation plate (102) is provided with a supporting foot (1022); the supporting foot (1022) is bent and close to the top plate (101).

3. The arc isolation plate installation structure according to claim 1, characterized in that: A mounting seat (201) is provided on one side of the secondary terminal group (2) close to the protective cover (1); A protruding upper mounting feature (2011) is provided on the mounting seat (201); the upper mounting feature (2011) is correspondingly coupled to the upper mounting hole (1031) of the protective cover (1).

4. The arc isolation plate installation structure according to claim 2, characterized in that: The length of the supporting foot (1022) is greater than or equal to one quarter of the length of the arc isolation plate (3); The distance between the supporting foot (1022) and the top plate (101) is slightly greater than the thickness of the arc isolation plate (3).

5. The arc isolation plate installation structure according to claim 3, characterized in that: The distance between the upper mounting feature (2011) and the terminal mounting plate (103) of the protective cover (1) and the top plate (101) is slightly greater than the thickness of the arc isolation plate (3).

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