A mounting bracket for a molded case circuit breaker

Abstract

This utility model relates to the technical field of circuit breaker bracket equipment, specifically disclosing a molded case circuit breaker mounting bracket, including an upper bracket and a lower bracket symmetrically arranged, both of which are equipped with a molded case circuit breaker fixing structure; an adjustment structure is provided between the upper bracket and the lower bracket, which can adjust the distance between them to adapt to different molded case circuit breakers; several arc-breaking structures are slidably connected to the upper bracket and the lower bracket on opposite sides to isolate electric arcs, and the distance adjustment structure is achieved through threaded engagement; the arc-breaking plates of the arc-breaking structures are equipped with a functional coating, which has both insulation and high-temperature resistance properties. This utility model has a simple structure and convenient adjustment, which can improve the installation flexibility and use safety of molded case circuit breakers, and is suitable for installation scenarios of various specifications of molded case circuit breakers.

Description

Technical Field

[0001] This application relates to the field of circuit breaker bracket equipment technology, and specifically discloses a molded case circuit breaker mounting bracket. Background Technology

[0002] Molded case circuit breakers (MCCBs) are commonly used low-voltage protective electrical appliances in power systems, widely applied in industrial and civil buildings. Their installation stability and operational safety directly affect the reliable operation of the power system. Currently, MCCBs are typically fixed in distribution boxes or cabinets using mounting brackets. However, traditional mounting brackets have the following shortcomings:

[0003] Fixed size: The vertical mounting distance of traditional brackets is not adjustable, and they can only accommodate a single size of molded case circuit breaker. When it is necessary to replace the circuit breaker with a different size, the entire bracket must be replaced, which increases the installation cost and operation complexity.

[0004] Lack of arc protection: Molded case circuit breakers are prone to generating arcs when breaking circuits. If the arcs between adjacent contacts interfere with each other, they may cause safety hazards such as insulation breakdown and short circuit. Traditional brackets do not have a dedicated arc isolation structure and cannot effectively block the arc.

[0005] To address the aforementioned issues, there is an urgent need to design an installation bracket that can flexibly adapt to circuit breakers of different specifications and has arc protection capabilities. Utility Model Content

[0006] The purpose of this utility model is to provide a mounting bracket for molded case circuit breakers to solve the problems of fixed size, poor adaptability and lack of arc protection of traditional brackets, and to realize the functions of adjustable bracket distance and effective arc isolation.

[0007] To achieve the above objectives, the basic solution of this utility model provides a mounting bracket for a molded case circuit breaker, including an upper bracket and a lower bracket symmetrically arranged and each equipped with a fixing structure for the molded case circuit breaker, an adjustment structure located between the upper bracket and the lower bracket for adjusting the distance to adapt to different molded case circuit breakers, and several arc-breaking structures slidably connected to the upper bracket and the lower bracket on opposite sides for isolating electric arcs. The arc-breaking structure includes an adjustment block slidably connected to the corresponding upper bracket and the lower bracket, an arc-breaking plate rotatably connected to the adjustment block, and screws for fixing the arc-breaking plate.

[0008] Furthermore, the adjustment structure includes a threaded cylinder vertically disposed on the inner wall of the upper support near the lower support and having internal threads, and a threaded rod threadedly connected to the threaded cylinder and rotatably connected to the top of the lower support.

[0009] Furthermore, the bottom of the threaded rod is provided with a swivel ring, and the top of the lower bracket is provided with a swivel groove for the swivel ring to rotate.

[0010] Furthermore, the arc diaphragm is provided with a functional coating, which includes an epoxy resin coating and a ceramic base coating arranged sequentially from the outside to the inside.

[0011] Furthermore, the arc diaphragm includes a rotating part and an isolating part, the rotating part being rotatably connected to the adjusting block, and the isolating part being used to separate adjacent contacts.

[0012] Furthermore, the upper support and the lower support are each provided with a horizontal adjustment groove on a side away from each other, and the adjustment block is slidably connected in the adjustment groove.

[0013] Furthermore, the molded case circuit breaker is provided with several hexagonal sockets at the top and bottom, and the fixing structure includes several hexagonal socket connecting slots provided on the side walls of the upper and lower brackets and corresponding to the number of hexagonal sockets, as well as hexagonal socket bolts that are detachably connected to the hexagonal socket connecting slots.

[0014] The principle and effect of this basic scheme are as follows:

[0015] 1. High adaptability: By adjusting the screw cylinder and screw rod of the structure, the distance between the upper and lower brackets can be flexibly adjusted to adapt to molded case circuit breakers of different heights and specifications, without the need for frequent bracket replacement;

[0016] 2. Reliable arc protection: The arc isolation structure can adjust the protection position and angle by sliding adjustment blocks and rotating arc isolation plates. The functional coating further enhances the high temperature resistance and arc resistance of the isolation plates, effectively blocking arc interference and reducing safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This paper shows an overall schematic diagram of a molded case circuit breaker mounting bracket according to an embodiment of this application;

[0019] Figure 2 This paper shows a schematic diagram of an adjusting block for a molded case circuit breaker mounting bracket according to an embodiment of this application;

[0020] Figure 3 A schematic diagram of the internal rotating ring of a molded case circuit breaker mounting bracket according to an embodiment of this application is shown. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] The reference numerals in the accompanying drawings of the instruction manual include: 1. Molded case circuit breaker; 2. Upper bracket; 3. Lower bracket; 4. Threaded cylinder; 5. Threaded rod; 6. Adjusting groove; 7. Adjusting block; 8. Screw; 9. Arc diaphragm; 901. Functional coating; 10. Hex socket head cap screw; 11. Rotary ring.

[0023] A mounting bracket for a molded case circuit breaker, implementing, for example Figure 1 , Figure 2 , Figure 3 As shown: A mounting bracket for a molded case circuit breaker 1, comprising an upper bracket 2, a lower bracket 3, an adjustment structure, and an arc-breaking structure, the structure and function of each part are as follows:

[0024] The upper bracket 2 and the lower bracket 3 are symmetrically distributed vertically and are both made of rigid materials. Their core function is to support and fix the molded case circuit breaker 1. The side walls of both the upper bracket 2 and the lower bracket 3 are equipped with fixing structures for the molded case circuit breaker 1. The fixing structures of the molded case circuit breaker 1 ensure that the circuit breaker does not loosen or shift after installation.

[0025] In this embodiment, the top and bottom of the molded case circuit breaker 1 are pre-set with multiple hexagon sockets. The fixing structure of the molded case circuit breaker 1 specifically includes hexagon socket connecting slots and hexagon socket bolts 10. The hexagon socket connecting slots are opened on the side walls of the upper bracket 2 and the lower bracket 3, and the number of them corresponds exactly to the hexagon sockets of the molded case circuit breaker 1. The hexagon socket bolts 10 and the hexagon socket connecting slots are detachably connected. During installation, the hexagon socket bolts 10 pass through the hexagon sockets and are screwed into the hexagon socket connecting slots to achieve rigid fixing of the circuit breaker and the bracket. During disassembly, the circuit breaker can be removed simply by unscrewing the bolts. The operation is convenient and the connection is highly reliable.

[0026] An adjustment structure is installed between the upper support 2 and the lower support 3 to adjust the vertical distance between them to accommodate molded case circuit breakers 1 of different specifications. The adjustment structure includes a threaded cylinder 4, a threaded rod 5, and a rotating groove. The threaded cylinder 4 is vertically fixed on the inner wall of the upper support 2 near the lower support 3, and the cylinder body has internal threads. The outer wall of the threaded rod 5 has external threads that match the internal threads of the threaded cylinder 4. The top of the threaded rod 5 is threadedly connected to the threaded cylinder 4, and a circular rotating ring 11 is fixedly installed at the bottom. The rotating groove is opened at the top of the lower support 3. After the rotating ring 11 is embedded in the rotating groove, it can rotate freely but cannot move axially. During adjustment, the threaded rod 5 is rotated. Because the rotating ring 11 is limited by the rotating groove, the threaded rod 5 only rotates circumferentially. The threaded cylinder 4 drives the upper support 2 to rise and fall axially along the threaded rod 5, thereby changing the distance between the upper and lower supports 3 to accommodate molded case circuit breakers 1 of different heights.

[0027] Multiple arc-breaking structures are provided, which are slidably installed on the top of the upper bracket 2 and the bottom of the lower bracket 3 to block the arc generated by the circuit breaker contacts and avoid arc interference between adjacent contacts or between circuit breakers. The arc-breaking structure includes an adjusting groove 6, an adjusting block 7, an arc-breaking plate 9, and screws 8. The adjusting groove 6 is horizontally opened on the top of the upper bracket 2 and the bottom of the lower bracket 3, serving as the sliding track for the adjusting block 7. The adjusting block 7 is clearance-fitted with the adjusting groove 6 and can slide horizontally along the adjusting groove 6 to achieve lateral position adjustment of the arc-breaking plate 9. The arc-breaking plate 9 is made of insulating and high-temperature resistant material and is divided into a rotating part and an isolating part. The rotating part is connected to the adjusting block 7 through a rotating shaft and can rotate around the rotating shaft. The isolating part is used to physically separate adjacent contacts. The screws 8 are installed on the side wall of the adjusting block 7, with the end abutting against the rotating part of the arc-breaking plate 9. After the arc-breaking plate 9 is adjusted to the target position, the screws 8 are tightened to fix the plate. In addition, the surface of the arc separator 9 is coated with a functional coating 901, which consists of an epoxy resin coating and a ceramic base coating from the outside to the inside. The dual coatings respectively give the separator insulation and corrosion resistance and high temperature resistance and arc erosion resistance, thus improving the protection life.

[0028] The usage process of this utility model is as follows:

[0029] First, adjust the bracket spacing. Based on the actual height of the molded case circuit breaker 1 to be installed, rotate the threaded rod 5 in the adjustment structure. During the rotation, the upper bracket 2 will rise and fall axially along the threaded rod 5 with the threaded cylinder 4, continuously adjusting until the spacing between the upper and lower brackets 3 matches the height of the circuit breaker.

[0030] Next, proceed with the circuit breaker fixing operation. Place the molded case circuit breaker 1 between the side walls of the upper bracket 2 and the lower bracket 3, and carefully align the hexagon sockets at the top and bottom of the circuit breaker with the hexagon socket grooves on the side walls of the brackets. After alignment, insert the hexagon socket bolts 10 into the hexagon sockets and tighten them until the hexagon socket bolts 10 are tightly engaged with the corresponding hexagon socket grooves on the upper and lower brackets. Gently shake the circuit breaker manually to confirm that it is securely installed without any loosening or displacement, thus completing the fixing of the circuit breaker to the brackets.

[0031] Next, adjust the arc-breaking structure. Slide the adjusting block 7 along the adjusting groove 6 between the top of the upper bracket 2 and the bottom of the lower bracket 3 to move the arc-breaking plate 9 to the position corresponding to the adjacent contacts of the circuit breaker. Then rotate the insulating part of the arc-breaking plate 9 to completely cover the gap between the adjacent contacts, ensuring effective arc blocking. After adjustment, tighten the screw 8 on the side wall of the adjusting block 7. The end of the screw 8 presses against the rotating part of the arc-breaking plate 9 to fix the position and angle of the plate, preventing it from shifting during circuit breaker operation.

[0032] Finally, conduct post-installation inspections. Manually shake the molded case circuit breaker 1 again to verify the reliability of the fixing effect. At the same time, observe the position and coverage of the arc separator 9 to confirm that all adjacent contact gaps that need protection are covered by the separator, with no blind spots. Ensure that the bracket can be put into normal use after installation, providing stable support and arc protection for the operation of the circuit breaker.

[0033] The advantages of this utility model are as follows:

[0034] The adjustment mechanism consisting of threaded rod 5 and threaded cylinder 4 allows for flexible adjustment of the distance between the upper and lower supports 3, thereby adapting to the installation of molded case circuit breakers 1 of different heights and sizes, greatly improving the versatility and applicability of the supports.

[0035] With its sliding and rotatable arc-isolating structure, the position and angle of the baffle can be flexibly adjusted according to the actual installation position and contact spacing of the circuit breaker, accurately separating and guiding the arc, effectively preventing phase-to-phase short circuits and improving operational safety.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A molded case circuit breaker mounting bracket, characterized by, The device includes an upper and lower bracket symmetrically arranged and each equipped with a fixed structure for molded case circuit breakers; an adjustment structure located between the upper and lower brackets for adjusting the distance to adapt to different molded case circuit breakers; and several arc-breaking structures slidably connected to the upper and lower brackets on opposite sides for isolating electric arcs. Each arc-breaking structure includes an adjustment block slidably connected to the corresponding upper and lower brackets, an arc-breaking plate rotatably connected to the adjustment block, and screws for fixing the arc-breaking plate.

2. The molded case circuit breaker mounting bracket of claim 1, wherein, The adjustment structure includes a threaded cylinder vertically mounted on the inner wall of the upper support near the lower support and having internal threads, and a threaded rod threadedly connected to the threaded cylinder and rotatably connected to the top of the lower support.

3. A molded case circuit breaker mounting bracket as recited in claim 2 wherein, The threaded rod has a swivel at the bottom and a groove at the top of the lower bracket for the swivel to rotate.

4. The molded case circuit breaker mounting bracket of claim 1, wherein, The arc diaphragm is provided with a functional coating, which includes an epoxy resin coating and a ceramic base coating arranged sequentially from the outside to the inside.

5. A molded case circuit breaker mounting bracket as recited in claim 4 wherein, The arc diaphragm includes a rotating part and an isolating part. The rotating part is rotatably connected to the adjusting block, and the isolating part is used to separate adjacent contacts.

6. A molded case circuit breaker mounting bracket according to claim 1, wherein, The upper and lower supports are each provided with horizontal adjustment grooves on opposite sides, and the adjustment block is slidably connected in the adjustment groove.

7. A molded case circuit breaker mounting bracket as recited in claim 1 wherein, The molded case circuit breaker is provided with several internal hexagonal interfaces at the top and bottom. The fixing structure includes several internal hexagonal connecting slots provided on the side walls of the upper and lower brackets and corresponding to the number of internal hexagonal interfaces, as well as internal hexagonal bolts that are detachably connected to the internal hexagonal connecting slots.

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