Arc extinguish chamber mounting structure and frame circuit breaker using same

Abstract

The utility model discloses an arc extinguish chamber mounting structure and a frame circuit breaker using the same, the arc extinguish chamber mounting structure comprises an arc extinguish chamber, an arc extinguish chamber cover, a bottom plate and a base, the arc extinguish chamber cover is mounted at the top of the arc extinguish chamber to form a whole with the arc extinguish chamber cover; the upper portion of the rear wall of the base installation chamber and the upper portion of the front wall of the bottom plate are provided with notches with the depth equal to the height of the arc extinguish chamber, the two side faces of the arc extinguish chamber cover are provided with vertical protruding features and concave features, screw holes are formed in the protruding features, and screw holes are formed in the tops of the base partition plate and the side walls. The whole body formed by the arc extinguish chamber and the arc extinguish chamber cover is fastened in the screw holes in the partition plate and the side face of the base through screws penetrating through the screw holes in the side face of the arc extinguish chamber cover, the problem that the space of the arc extinguish chamber in the prior art is limited by the bottom plate and the base is solved through the scheme, and the technical effect of effectively and conveniently increasing the capacity of the arc extinguish chamber is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical equipment components, in particular to an arc extinguishing chamber installation structure and a frame circuit breaker using the structure. Background Art

[0002] Frame circuit breakers usually use air as the medium and use arc-extinguishing grids arranged in series to cut the arc for arc extinguishing. If the arc can enter between more arc-extinguishing grids, the arc voltage formed by the series connection exceeds the power supply voltage, and the arc will not be able to maintain combustion and will be extinguished. With the continuous development of the new energy industry, due to cost considerations, the operating voltage of wind power or photovoltaic systems has generally increased to more than 1000V. At such a high voltage level, the existing arc-extinguishing chamber capacity is no longer sufficient for reliable arc extinguishing. Limited by the size of the product, how to increase the capacity of the arc-extinguishing chamber within the existing space has become a consideration for most electrical design engineers. The arc extinguishing chambers in existing products, such as a low-voltage circuit breaker with a sealed arc extinguishing chamber installation structure disclosed in the authorization announcement number CN202423182U, are mostly installed by fixing the front and rear ends of the arc extinguishing grid group to the base bottom plate with screws. In this scheme, a first arc extinguishing chamber installation feature 21 is to be set on the upper front part of the base 2, and a second arc extinguishing chamber installation feature 21 is to be set on the upper rear part of the base 3. These features are usually screw hole structures. The arc extinguishing chamber range 11 occupies the space of the base and the base. There is a space 22 of the base 2 occupied by the arc extinguishing chamber 1 and a space 32 of the base 3 occupied by the arc extinguishing chamber 1, which makes it difficult to enlarge the arc extinguishing chamber 1. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides an arc extinguishing chamber installation structure and a frame circuit breaker using the structure, so as to solve the problem in the prior art that the arc extinguishing chamber space is limited by the bottom plate and the base.

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A arc extinguishing chamber mounting structure comprises an arc extinguishing chamber, a bottom plate and a base; the bottom and rear of the base are closed, the front and top are open, and a partition is arranged inside the base to divide it into different mounting chambers along the side; the bottom and front of the bottom plate are closed, and the rear and top are open; more than one horizontal screw hole is arranged in the front and side of the partition and the corresponding position of the bottom plate of the base along the front and rear directions, the bottom plate is installed in the front of the base through the horizontal screw hole and forms different upward-opening rectangular spaces with the base, the arc extinguishing chamber is installed in the rectangular space from above, and also includes an arc extinguishing chamber cover, the arc extinguishing chamber cover is installed on the top of the arc extinguishing chamber to form a whole with the arc extinguishing chamber cover, the upper part of the rear wall of the base mounting chamber and the upper part of the front wall of the bottom plate are provided with a notch with the same depth as the height of the arc extinguishing chamber, and the front-to-back length of the bottom of the arc extinguishing chamber is not less than the two notches The front-to-back distance of the outer edge, more than one vertical raised features are arranged on both sides of the arc extinguishing chamber cover, and screw holes are arranged in the raised features whose positions are controlled at the top of the base partition and the side wall. The raised features on both sides of the arc extinguishing chamber cover are staggered in front and back positions, and concave features are arranged at the opposite symmetrical positions of the raised features on both sides of the arc extinguishing chamber cover so that the raised features on the adjacent sides of the arc extinguishing chamber cover extend into the corresponding concave features, and vertical screw holes corresponding to the positions of the raised features and concave features on the sides of the arc extinguishing chamber cover are arranged on the upper part of the partition of the base, and vertical screw holes corresponding to the positions of the raised features on the sides of the arc extinguishing chamber cover are arranged inside or outside the upper side of the base, and the arc extinguishing chamber and the arc extinguishing chamber cover are integrally formed by screws passing through the screw holes on the sides of the arc extinguishing chamber cover to be fastened in the screw holes on the base partition and the sides.

[0006] Preferably, the convex feature is a cylindrical convex feature, and the concave feature is an arc concave feature.

[0007] Preferably, the top of the raised feature is recessed below the top surface of the arc extinguishing chamber cover.

[0008] Preferably, a side panel is further provided on the outer side of the base, and a side panel bend is provided on the top of the side panel, and the bend on the side panel extends between the arc extinguishing chamber and the side of the base and is provided with a vertical screw hole corresponding to the raised characteristic position on the side of the arc extinguishing chamber cover, and the screw hole is a threaded hole.

[0009] Preferably, a longitudinal groove along the front-to-back direction is opened on the top of the base partition, and a transverse groove along the front-to-back direction is also opened in the middle of the longitudinal groove in the vertical direction, and the transverse groove passes through the front part of the base partition, and a bracket bar is arranged in the transverse groove, and the bracket bar is provided with vertical screw holes along the front-to-back direction corresponding to the raised and recessed features on the side of the arc extinguishing chamber cover, and the screw holes are threaded holes.

[0010] Preferably, there are two screw holes on the front of each partition of the base.

[0011] Preferably, the number of vertical raised features arranged on each side of the arc extinguishing chamber cover is two.

[0012] Preferably, the side panels are provided with inwardly facing bending claws at the front and rear, the bending claws are provided with screw holes, and horizontal screw holes are also provided at the rear of the base side surface, and the side panels are fixed in the horizontal screw holes at the front and rear of the base side surface through the bending claws.

[0013] Preferably, the side panels are also provided with transverse handle holes.

[0014] Based on the same inventive concept, the present application also uses the following scheme:

[0015] A frame circuit breaker includes a moving contact assembly, a stationary contact assembly, and the above-mentioned arc extinguishing chamber mounting structure. The moving contact assembly and the stationary contact assembly are mounted in a rectangular space formed by a base and a bottom plate below the arc extinguishing chamber, and the copper busbar of the stationary contact assembly extends forward from the bottom plate.

[0016] The present application proposes an arc extinguishing chamber installation structure and a frame circuit breaker using the structure, which fixes the arc extinguishing chamber in a side-mounted manner, freeing up the space of the original base bottom plate occupied by the arc extinguishing chamber installation position, making it possible to increase the capacity of the arc extinguishing chamber, and solving the problem of the arc extinguishing chamber space being limited by the bottom plate and the base in the prior art. At the same time, the bracket bars and horizontal and vertical grooves on the inner side of the base are arranged to facilitate installation and ensure insulation, and the arrangement of the side panels provides convenience in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a three-dimensional structure of an assembled circuit breaker embodiment of the present application;

[0018] Figure 2 This is a longitudinal cross-sectional schematic diagram of an embodiment of a circuit breaker of the present application;

[0019] Figure 3 This is a schematic transverse cross-sectional view of an embodiment of a circuit breaker of the present application;

[0020] Figure 4 This is a schematic diagram of a three-dimensional structure of an arc extinguishing chamber and an arc extinguishing chamber cover assembled from top to bottom in an embodiment of a circuit breaker of the present application;

[0021] Figure 5 This is a schematic diagram of a three-dimensional structure from a side front view showing an arc extinguishing chamber and an arc extinguishing chamber cover installed on a base in an embodiment of the arc extinguishing chamber installation structure of the present application;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the arc extinguishing chamber and the arc extinguishing chamber cover side bracket strip perspective of an embodiment of the arc extinguishing chamber installation structure of the present application;

[0023] Figure 7 This is a schematic diagram of the three-dimensional structure of an embodiment of an arc extinguishing chamber cover of the present application;

[0024] Figure 8 This is a schematic diagram of the three-dimensional structure of an embodiment of a bracket bar of the present application;

[0025] Fig. 9 It is a longitudinal cross-sectional schematic diagram of a circuit breaker in the prior art;

[0026] Fig.10 It is a schematic diagram of arc extinguishing chamber assembly of a circuit breaker in the prior art;

[0027] Among them, 1-arc extinguishing chamber, 11-arc extinguishing chamber range, 12-inter-group screw area, 2-bottom plate, 21-first arc extinguishing chamber installation feature, 22-the space of the bottom plate occupied by the arc extinguishing chamber, 3-base, 31-second arc extinguishing chamber installation feature, 32-the space of the base occupied by the arc extinguishing chamber, 33-horizontal groove, 34-vertical groove, 4-arc extinguishing chamber cover, 41-concave feature, 42-convex feature, 5-side plate, 51-bend on the side plate, 6-bracket bar, 7-screw. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] The present embodiment provides a technical solution: the arc extinguishing chamber installation structure of the utility model comprises a bottom plate 2 and a base 3, two arc extinguishing chambers 1 and corresponding arc extinguishing chamber covers 4; the bottom and rear of the base 3 are closed, the front and top are open, and a partition is arranged inside the base 3 to divide the base 3 into two different installation chambers along the side direction; the bottom and front of the bottom plate 2 are closed, and the rear and top are open; two horizontal screw holes are arranged in the front and side of the partition and the corresponding positions of the base 3 and the bottom plate 2 along the front and rear directions, the bottom plate 2 is installed in front of the base 3 through the horizontal screw holes and forms two different rectangular spaces with openings upward with the base 3, the arc extinguishing chamber 1 is installed in the rectangular space from above, each arc extinguishing chamber cover 4 is installed on the top of the arc extinguishing chamber 1 to form a whole with the arc extinguishing chamber cover 4, and the upper part of the rear wall of the base 3 installation chamber and the upper part of the front wall of the bottom plate 2 are provided with a notch with a depth the same as the height of the arc extinguishing chamber 1 In this embodiment, the front-to-back length of the bottom of the arc extinguishing chamber 1 is equal to the front-to-back distance between the outer edges of the two notches. Two vertical raised features 42 are provided on both sides of the arc extinguishing chamber cover 4. The raised features 42 have screw holes whose positions are controlled at the top of the partition and the side wall of the base 3. The raised features 42 on both sides of the arc extinguishing chamber cover 4 are staggered in front and back positions. Concave features 41 are also provided at opposite symmetrical positions of the raised features 42 on both sides of the arc extinguishing chamber cover 4 so that the raised features 42 on the adjacent sides of the arc extinguishing chamber cover 4 extend into the corresponding concave features 41. In this embodiment, the raised features are cylindrical raised features, and the concave features are arc concave features. However, the shapes of the raised features 42 and the concave features 41 are not limited to the above shapes, and other shapes such as square can also be used. In this embodiment, the top of the raised feature 42 is also recessed in the top surface of the arc extinguishing chamber cover 4 so that the top of the screw 7 does not protrude from the arc extinguishing chamber cover 4.

[0030] The upper part of the partition of the base 3 is provided with a vertical screw hole corresponding to the position of the convex feature 42 and the concave feature 41 on the side of the arc extinguishing chamber cover 4. In this embodiment, the vertical screw hole is arranged on the bracket bar 6, that is, the top of the partition of the base 3 is provided with a longitudinal groove 34 along the front-to-back direction, and the middle part of the longitudinal groove 34 in the vertical direction is also provided with a transverse groove 33 along the front-to-back direction. The transverse groove 33 runs through the front part of the partition of the base 3, so that the bracket bar 6 can pass through the transverse groove 33 from the front. The bracket bar 6 is arranged in the transverse groove 33, and the bracket bar 6 is provided with a vertical screw hole corresponding to the position of the convex feature 42 and the concave feature 41 on the side of the arc extinguishing chamber cover 4 along the front-to-back direction. The screw hole is a threaded hole. The arrangement of this example can effectively improve the convenience of installation and improve the insulation performance.

[0031] A vertical screw hole corresponding to the position of the raised feature 42 on the side of the arc extinguishing chamber cover 4 is provided inside or outside the upper side of the base 3. In this embodiment, the vertical screw hole is provided on the outside of the upper side of the base 3. The screw hole is a threaded hole, that is, a side plate bend 51 is provided between the arc extinguishing chamber 1 and the side of the base 3. The side plate bend 51 is provided on the top of the side plate 5. The side plate 5 is fixed to the horizontal screw holes on the front and rear sides of the side of the base 3 through the screw holes on the inward bending claws provided at the front and rear. The bottom of the side plate 5 is provided with an outward bend, and the outer surface of the side plate 5 is also provided with a transverse handle hole to improve the convenience of use.

[0032] It should be noted that both the transverse groove 33 and the longitudinal groove 34 can be extended into the front base plate 2, that is, the rear part of the partition of the base plate 2 is also provided with a transverse groove 33 and a longitudinal groove 34 in the same position, and the screw holes of the bracket bar 6 can also be provided in the transverse groove 33 and the longitudinal groove 34 of the base plate 2.

[0033] The arc extinguishing chamber 1 and the arc extinguishing chamber cover 4 form a whole, which is fastened to the screw holes on the partition and the side of the base 3 by using screws 7 passing through the screw holes on the side of the arc extinguishing chamber cover 4. In this embodiment, since there are only two installation chambers, the screws 7 on one side are fixed to the threaded holes on the upper end of the side plate 5, and the other side is fixed to the bracket bar 6 in the base 3. By utilizing the four arc concave features and four cylindrical convex features on both sides of the arc extinguishing chamber cover 4, when the arc extinguishing chambers 4 are arranged in a group, the strokes are staggered to form a screw area 12 between groups, so that four screws 7 are installed on the same bracket bar 6.

[0034] Based on the same inventive concept, the present application also discloses a frame circuit breaker, including a moving contact assembly, a static contact assembly, and the above-mentioned arc extinguishing chamber mounting structure, wherein the moving contact assembly and the static contact assembly are installed in a rectangular space formed by a base 3 and a bottom plate 2 below the arc extinguishing chamber 1, and the copper busbar of the static contact assembly extends forward from the bottom plate 2.

[0035] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An arc extinguishing chamber installation structure, comprising an arc extinguishing chamber (1), a bottom plate (2) and a base (3); the base (3) is closed at the bottom and rear, and open at the front and top, and is provided with a partition plate to divide it into different installation chambers along the lateral direction; the bottom plate (2) is closed at the bottom and front, and open at the rear and top; the partition plate and the front of the side of the base (3) and the corresponding position of the bottom plate (2) are provided with more than one horizontal screw hole along the front-to-back direction, the bottom plate (2) is installed in front of the base (3) through the horizontal screw hole and encloses different rectangular spaces with openings facing upwards with the base (3), the arc extinguishing chamber (1) is installed in the rectangular space from above, and is characterized in that: It also includes an arc extinguishing chamber cover (4), the arc extinguishing chamber cover (4) being mounted on the top of the arc extinguishing chamber (1) and forming an integral body with the arc extinguishing chamber cover (4), the upper part of the rear wall of the mounting chamber of the base (3) and the upper part of the front wall of the bottom plate (2) are both provided with notches of the same depth as the height of the arc extinguishing chamber (1), the front-to-back length of the bottom of the arc extinguishing chamber (1) is not less than the front-to-back distance between the outer edges of the two notches, more than one vertical raised features (42) are provided on both sides of the arc extinguishing chamber cover (4), the raised features (42) having screw holes whose positions are controlled at the top of the partition and the side wall of the base (3), the raised features (42) on both sides of the arc extinguishing chamber cover (4) are staggered in front and back positions, and the raised features (42) on both sides of the arc extinguishing chamber cover (4) are staggered in front and back positions. A concave feature (41) is also provided at a symmetrical position opposite to the feature (42) so that the convex feature (42) on the side of the adjacent arc-extinguishing chamber cover (4) extends into the corresponding concave feature (41); a vertical screw hole corresponding to the position of the convex feature (42) and the concave feature (41) on the side of the arc-extinguishing chamber cover (4) is provided on the upper part of the partition of the base (3); a vertical screw hole corresponding to the position of the convex feature (42) on the side of the arc-extinguishing chamber cover (4) is provided inside or outside the upper part of the side of the base (3); the arc-extinguishing chamber (1) and the arc-extinguishing chamber cover (4) are integrally fastened to the screw holes on the partition and the side of the base (3) by means of screws (7) passing through the screw holes on the side of the arc-extinguishing chamber cover (4).

2. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The convex feature (42) is a cylindrical convex feature, and the concave feature (41) is an arc concave feature.

3. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The top of the raised feature (42) is recessed into the top surface of the arc extinguishing chamber cover (4).

4. The arc extinguishing chamber installation structure according to claim 1, characterized in that: A side plate (5) is also provided on the outside of the side surface of the base (3); a side plate upper bend (51) is provided on the top of the side plate (5) and extends inwardly; the side plate upper bend (51) extends between the arc extinguishing chamber (1) and the side surface of the base (3) and is provided with a vertical screw hole corresponding to the position of the protruding feature (42) on the side surface of the arc extinguishing chamber cover (4); the screw hole is a threaded hole.

5. The arc extinguishing chamber installation structure according to claim 4, characterized in that: A longitudinal groove (34) is formed at the top of the partition plate of the base (3) along the front-to-back direction, and a transverse groove (33) is formed in the middle of the longitudinal groove (34) in the vertical direction along the front-to-back direction. The transverse groove (33) passes through the front part of the partition plate of the base (3), and a support bar (6) is arranged in the transverse groove (33). The support bar (6) is provided with vertical screw holes corresponding to the positions of the convex features (42) and the concave features (41) on the side of the arc extinguishing chamber cover (4) along the front-to-back direction, and the screw holes are threaded holes.

6. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The base (3) has two screw holes on the front of each partition.

7. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The number of vertical protruding features (42) arranged on each side of the arc extinguishing chamber cover (4) is two.

8. The arc extinguishing chamber installation structure according to claim 4, characterized in that: The side panels (5) are provided with inwardly facing bending claws at the front and rear, with screw holes formed on the bending claws. Horizontal screw holes are also provided at the rear of the side surface of the base (3), and the side panels (5) are fixed in the horizontal screw holes at the front and rear of the side surface of the base (3) through the bending claws.

9. The arc extinguishing chamber installation structure according to claim 4, characterized in that: The side plate (5) is also provided with a transverse handle hole.

10. A frame circuit breaker, comprising a moving contact assembly and a stationary contact assembly, characterized in that: It also includes the arc extinguishing chamber installation structure according to any one of claims 1 to 9, wherein the moving contact assembly and the stationary contact assembly are installed in a rectangular space formed by a base (3) and a bottom plate (2) below the arc extinguishing chamber (1), and the copper busbar of the stationary contact assembly extends forward from the bottom plate (2).

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