CN219873386U

CN219873386U - Terminal cover structure for molded case circuit breaker

Info

Publication number: CN219873386U
Application number: CN202320379284.4U
Authority: CN
Inventors: 贾延超; 徐君成; 王忠斌
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-10-20
Anticipated expiration: 2033-03-02

Abstract

A terminal cover structure for moulded case circuit breaker, it includes terminal cover and flash barrier, its characterized in that: the terminal cover is provided with a flash barrier mounting groove at the position for mounting the flash barrier, and a cutting tongue structure is arranged at two sides of the flash barrier. The arc-shaped plate is reliably and stably arranged in the arc-shaped plate mounting groove by using the deformability of the cutting tongue structure by arranging the cutting tongue structure at the positions of the two side ends of the arc-shaped plate corresponding to the arc-shaped plate mounting groove, and the arc-shaped plate is not easy to fall. The phase separation plates are installed by adding grooves for installing the phase separation plates between adjacent products to the terminal cover, thereby avoiding a short circuit between the adjacent products.

Description

Terminal cover structure for molded case circuit breaker

Technical Field

The utility model belongs to the technical field of molded case circuit breakers, and particularly relates to a terminal cover structure for a molded case circuit breaker.

Background

The plastic shell circuit breaker is a common distribution protection electric appliance, has the functions of on/off and overload and short-circuit protection for supplying power to a load, and is widely applied to an electric power distribution system. The molded case circuit breaker has stronger arc extinguishing capability and can bear larger short-circuit current. However, when the plastic case circuit breaker bears a large short-circuit current, interphase short-circuit at an external wiring position or short-circuit between adjacent products is easy to occur, so that the distribution box is burnt.

In order to avoid the phenomenon that when the molded case circuit breaker bears large short-circuit current, interphase short circuit at an external wiring position or short circuit between adjacent products occurs to cause burning loss of a distribution box, the zero flashover terminal cover is added to the wiring end of the circuit breaker, and the flash barrier is arranged on the terminal cover.

In order to solve the above technical problems, chinese patent ZL202221113289.4 discloses a terminal cover, which includes a body, disposed at one side of a circuit breaker, and having an opening facing an arc extinguishing chamber of the circuit breaker; at least one first baffle is located along the flow direction of electric arc in the explosion chamber the body is inside, be equipped with the export on the first baffle, be equipped with guide structure on the export, guide structure personally submits the contained angle setting with the level to guide electric arc slope flow. In the technical scheme, the protrusions on the arc-shaped isolating plate are installed in interference fit with the clamping grooves, the interference is difficult to control, too much interference is difficult to install, and too little interference is caused, so that the arc-shaped isolating plate is easy to drop.

Disclosure of Invention

The utility model aims to overcome the defect that the installation is unreliable due to the fact that the existing arc-shield plate and the terminal cover are installed in an interference fit mode, and provides a terminal cover structure for a molded case circuit breaker. The phase separation plates are installed by adding grooves for installing the phase separation plates between adjacent products to the terminal cover, thereby avoiding a short circuit between the adjacent products.

Technical proposal

In order to achieve the above technical object, the present utility model provides a terminal cover structure for a molded case circuit breaker, comprising a terminal cover and an arc shield, characterized in that: the terminal cover is provided with a flash barrier mounting groove at the position for mounting the flash barrier.

In one embodiment, the two sides of the arc barrier are provided with a tongue cutting structure.

In one embodiment, the arc-shield mounting groove comprises a mounting groove portion and a cutting tongue limiting groove portion, and the position of the cutting tongue structure corresponds to the position of the cutting tongue limiting groove portion.

In one embodiment, the mounting groove portion corresponds to a flat plate portion on both sides of the arc shield.

In one embodiment, the tab-limiting groove portion has a slope corresponding to the tab structure.

In one embodiment, a step is arranged at the joint of the mounting groove part and the cutting tongue limiting groove part.

In one embodiment, the upper two side ends of the arc-shaped barrier are provided with symmetrical tongue-cutting structures.

In one embodiment, the upper side and the lower side of the arc-shaped baffle are provided with tongue cutting structures with opposite tongue cutting opening directions.

In one embodiment, a plurality of arc baffles are arranged in the arc baffle mounting groove, and the positions among the arc baffles are staggered up and down, so that holes on the arc baffles are staggered to avoid gas from being directly sprayed out.

In one embodiment, two sides of the terminal cover are provided with spacing installation grooves of the phase separation plates, and the spacing installation grooves are used for being connected with the phase separation plates so as to realize arc separation between two adjacent circuit breaker products.

Advantageous effects

The utility model provides a terminal cover structure for a molded case circuit breaker, which comprises a terminal cover and an arc-shield plate, wherein an arc-shield plate mounting groove is formed in the terminal cover at a position for mounting the arc-shield plate, and cutting tongue structures are arranged at two side ends of the arc-shield plate. The arc-shaped plate is reliably and stably arranged in the arc-shaped plate mounting groove by using the deformability of the cutting tongue structure by arranging the cutting tongue structure at the positions of the two side ends of the arc-shaped plate corresponding to the arc-shaped plate mounting groove, and the arc-shaped plate is not easy to fall. The phase separation plates are installed by adding grooves for installing the phase separation plates between adjacent products to the terminal cover, thereby avoiding a short circuit between the adjacent products.

Drawings

FIG. 1 is a schematic diagram of a terminal cover product in example 1 of the present utility model;

FIG. 2 is a second view of the terminal cover product of example 1 of the present utility model;

fig. 3 is a front view of a terminal cover in embodiment 1 of the present utility model;

FIG. 4 is a cross-sectional view taken along the direction A in FIG. 3;

FIG. 5a is a view showing the process of mounting the terminal cover and the flash barrier in embodiment 1 of the present utility model

Fig. 5b is a schematic view showing a process of mounting the terminal cover and the arc shield in embodiment 1 of the present utility model;

FIG. 5c is a schematic view of the arc shield mounting slot of FIG. 5b in a v-direction cross-section;

FIG. 5d is a schematic view of the tab stop slot of the W-direction cross-sectional view of FIG. 5 b;

fig. 6a is a second schematic view of the installation of the terminal cover and the arc shield in embodiment 1 of the present utility model;

FIG. 6b is a schematic view showing staggered installation of arc baffles in embodiment 1 of the present utility model;

FIG. 6c is a cross-sectional view taken along the direction B in FIG. 6B;

FIG. 6d is an enlarged view of the staggered holes in the flash barrier at C in FIG. 6 b;

FIG. 7a is a diagram of a flash barrier product according to example 1 of the present utility model;

FIG. 7b is a right side view of the arc shield of example 1 of the present utility model;

fig. 8 is a schematic diagram of a molded case circuit breaker product in example 1 of the present utility model;

fig. 9 is a product view of a terminal cover in embodiment 2 of the present utility model;

FIG. 10 is a view showing the arc shield product of example 2 of the present utility model;

FIG. 11 is a schematic view showing the installation of a terminal cover and a flash barrier in embodiment 2 of the present utility model;

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present utility model for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of the present utility model have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in the description of the present utility model includes any and all combinations of one or more of the associated listed items.

Example 1

In the prior art, the arc-stop plate is arranged on the terminal cover through interference fit, the interference is not easy to control, when the interference is too large, the arc-stop plate is difficult to be arranged in the terminal cover, when the interference is too small, the arc-stop plate is easy to drop when a product is used, and the zero-flashover cannot be realized. In order to solve this problem, as shown in fig. 5a and 5b, the present embodiment provides a terminal cover structure for a molded case circuit breaker, which includes a terminal cover 1 shown in fig. 1,2,3 and 4 and a flash barrier 2 shown in fig. 7a and 7b, wherein a flash barrier mounting groove 101 is provided at a position for mounting the flash barrier 2 on the terminal cover 1, and a tongue-and-groove structure 2a is provided at positions corresponding to the flash barrier mounting groove 101 at both side ends of the flash barrier 2. The arc-shield mounting groove 101 includes a mounting groove portion 101a and a cut-tongue limit groove portion 101b. Specifically, the mounting groove 101a corresponds to the flat plate portions on both sides of the arc barrier 2. The cutting tongue limiting groove 101b has a slope corresponding to the cutting tongue structure 2a. A step 101c is arranged at the joint of the mounting groove 101a and the cutting tongue limiting groove 101b. In this embodiment, two protruding planar side walls on the terminal cover 1 form a mounting groove 101a, and two protruding inclined side walls on the terminal cover 1 form a cutting-tongue limiting groove 101b, which gradually narrows until the same width as the mounting groove 101 a. The step 101c is limited at the connection between the mounting groove 101a and the tongue-cutting limiting groove 101b, and when the arc-shaped plate is inserted into the arc-shaped plate mounting groove 101 of the terminal cover 1 from the right arc-shaped plate 2 to the left arc-shaped plate 2 as shown in fig. 5c and 5d, the flat plates on both sides of the arc-shaped plate 2 (i.e. the part of the arc-shaped plate 2 inside the tongue-cutting structure 2 a) are mounted in the mounting groove 101a, and the tongue-cutting structure 2a is gradually deformed in the tongue-cutting limiting groove 101b under the action of the inclined side wall. During the insertion of the flash barrier 2 into the flash barrier mounting groove 101 of the terminal cover 1, the cut tongue end is deformed by the side wall of the flash barrier mounting groove 101 (in this embodiment, the cut tongue limiting groove 101 b), and the flash barrier 2 is easily mounted into the flash barrier mounting groove 101 because the terminal cover 1 has a certain elasticity and the force applied to the cut tongue deformation is not large. After being mounted in place, the two inclined side walls of the tongue-limiting groove portion 101b become gradually narrower until the same width as the mounting groove portion 101a, at which time the tongue-cutting structure 2a is deformed in place in the groove having the same width as the mounting groove portion 101 a. Under the action of gravity or external force, the end of the cutting tongue is a right-angle edge, so that the cutting tongue of the flash barrier 2 is subjected to the reaction force of the right-angle edge of the flash barrier mounting groove 101, the reaction force prevents the flash barrier 2 from being taken out outwards, and the side wall of the flash barrier mounting groove 101 is not easy to take out because the flash barrier 2 is scraped and broken. When the tongue cutting end is installed in place, the arc-shaped baffle plate 2 is flush with the step 101c, so that the arc-shaped baffle plate 2 is indicated to be installed in place. The arc-shaped plate 2 can also prompt the installation of the arc-shaped plate 2 in place when the arc-shaped plate 2 is inserted into the bottom surface of the arc-shaped plate installation groove 101. Further, in order to reliably and stably mount the arc-shield plate 2 on the terminal cover 1. As shown in fig. 7a, symmetrical tongue-cutting structures 2a are arranged at two side ends of the arc-shaped barrier 2. Meanwhile, as shown in fig. 7b, the upper and lower sides of the arc-shaped plate 2 may be further provided with a tongue cutting structure 2a with opposite tongue cutting opening directions.

As shown in fig. 6a,6b,6c and 6d, a plurality of arc baffles 2 are installed in the arc baffle installation groove 101, and the positions between the arc baffles 2 are staggered up and down, so that holes 2b on the arc baffles 2 are staggered to avoid gas from directly spraying out. Because the arc-shaped plates have the same structure, the holes 2b on the arc-shaped plates 2 are staggered up and down by the up-and-down staggered installation of the arc-shaped plates. In the embodiment, through staggered arrangement of the bottom surface positions of the arc-shield mounting grooves 101, round holes on the multi-layer arc-shield are staggered up and down, and gas is prevented from directly flying out of the terminal cover from the circuit breaker through the arc-shield during short circuit breaking. In this embodiment, the step 101c has a height, and the bottom surface of the corresponding mounting groove also has a height, which corresponds to the height of the flash barrier 2, and the heights of the step surfaces may be irregular, as in fig. 6c, the heights of the leftmost and rightmost step surfaces are the same, the height of the second step surface on the left is the lowest, and the height of the third step surface on the left is between the two, so long as the positions between a plurality of flash barriers 2 are staggered up and down.

As shown in fig. 8, the two sides of the terminal cover 1 are provided with a spacing installation groove 102, and the spacing installation groove 102 provided on the two sides of the terminal cover 1 is provided with a spacing plate 4 for spacing arcs between two adjacent circuit breaker products. That is, the spacing mounting groove 102 of the phase partition plate is arranged at the middle position on the terminal cover, and the spacing mounting grooves 102 of the phase partition plate are also arranged at the two sides, so that when two products are tightly attached to each other, the phase partition plates 4 at the two sides of the terminal cover can avoid short circuit between the adjacent products, and the phase partition plates 4 are stably and reliably mounted on the terminal cover through the spacing mounting grooves 102 of the phase partition plate.

Example 2

As shown in fig. 9,10 and 11, the arc-shaped plate 2 is a steel wire mesh, a bracket 3 for placing the steel wire mesh is arranged on the outer side of the steel wire mesh, and protrusions 3a for interference fit with arc-shaped plate mounting grooves 101 on the terminal cover 1 are arranged on two sides of the bracket 3. Because the bracket 3 is made of plastic, the bulge 3a is easy to deform during installation, and the tolerance allowed by the interference can be larger, so that the bracket is not easy to fall off.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A terminal cover structure for moulded case circuit breaker, it includes terminal cover (1) and flash barrier (2), its characterized in that: a flash barrier mounting groove (101) is formed in the terminal cover (1) at a position for mounting the flash barrier (2).

2. The terminal cover structure for a molded case circuit breaker as claimed in claim 1, wherein: two sides of the arc-shaped baffle plate (2) are provided with a tongue cutting structure (2 a).

3. The terminal cover structure for a molded case circuit breaker as claimed in claim 2, wherein: the arc-shield mounting groove (101) comprises a mounting groove part (101 a) and a cutting tongue limiting groove part (101 b), and the position of the cutting tongue structure (2 a) corresponds to the position of the cutting tongue limiting groove part (101 b).

4. A terminal cover structure for a molded case circuit breaker as claimed in claim 3, wherein: the mounting groove (101 a) corresponds to the flat plate portions on both sides of the arc shield.

5. A terminal cover structure for a molded case circuit breaker as claimed in claim 3, wherein: the cutting tongue limiting groove (101 b) is provided with a slope corresponding to the cutting tongue structure (2 a).

6. A terminal cover structure for a molded case circuit breaker as claimed in claim 3, wherein: the connecting part of the mounting groove part (101 a) and the cutting tongue limiting groove part (101 b) is provided with a step (101 c).

7. The terminal cover structure for a molded case circuit breaker as claimed in claim 2, wherein: symmetrical tongue cutting structures (2 a) are arranged at the two side ends of the arc-shaped baffle plate (2).

8. The terminal cover structure for a molded case circuit breaker as claimed in claim 7, wherein: and the upper and lower ends of the two sides of the arc-shaped baffle plate (2) are provided with tongue cutting structures (2 a) with opposite tongue cutting opening directions.

9. The terminal cover structure for a molded case circuit breaker as claimed in claim 1, wherein: the arc-shaped baffles (2) are arranged in the arc-shaped baffle installation groove (101), and the positions among the arc-shaped baffles (2) are staggered up and down, so that holes (2 b) on the arc-shaped baffles (2) are staggered, and gas is prevented from being directly sprayed out.

10. The terminal cover structure for a molded case circuit breaker as claimed in claim 1, wherein: two sides of the terminal cover (1) are provided with a spacing installation groove (102) for spacing the phase-to-phase separator (4) so as to realize arc isolation between two adjacent circuit breaker products.