Molded case circuit breaker with zero flashover

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to a molded case circuit breaker with zero flashover, which comprises a molded case circuit breaker main body, a circuit breaker base and arc extinguishing chambers, the molded case circuit breaker main body is fixedly mounted above the circuit breaker base, the arc extinguishing chambers are fixedly connected to two sides of the circuit breaker base, and the molded case circuit breaker main body is fixedly mounted above the circuit breaker base. The arc extinguishing chamber is internally provided with an arc extinguishing grid sheet detachable replacement structure, and two sides of the arc extinguishing chamber are provided with zero-flashover separator plate installation structures. According to the molded case circuit breaker with the zero flashover, after the arc extinguishing grid sheets are fixed, the manual wheel is rotated to enable the rotating shaft to drive the convex blocks to reversely rotate by 90 degrees, and the convex blocks can be rotatably inserted into the concave positions of the inner walls of the positioning grooves to clamp the arc extinguishing grid sheets below; the arc extinguishing grid plate which is aged after being damaged can be replaced and detached without opening the arc extinguishing cover, so that the service life of the molded case circuit breaker with zero flashover is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, and particularly relates to a molded case circuit breaker with zero arcing. Background Art

[0002] The residual current protection molded case circuit breaker is a comprehensive intelligent residual current operated circuit breaker with overload protection, short-circuit protection, short-circuit short-time delay, overvoltage protection, undervoltage protection, open-phase protection, total loss of voltage protection, broken neutral protection, surge protection, automatic reclosing, and communication functions. The residual current protection molded case circuit breaker includes a body, a middle cover, a face cover arranged on the middle cover, an electromagnetic tripping mechanism, an operating mechanism, a contact system, an arc extinguishing system, and a circuit board arranged in the middle cover. The tripping unit is mechanically connected to the circuit breaker and is a device used to release the holding mechanism and automatically disconnect the circuit breaker.

[0003] For example, the publication number "CN221239573U" is a molded case circuit breaker with zero arcing. By arranging the arc extinguishing grid plates in a staggered manner, the first pressure relief holes are arranged in a staggered manner, extending the travel distance of the high-temperature and high-pressure gas generated during the arc generation, thereby reducing the flow rate of the high-pressure gas and achieving rapid elimination of arcing, making the product have the advantages of preventing arcing, safety, and reliability. However, for the existing molded case circuit breakers with zero arcing, since multiple arc extinguishing grid plates are set at the wiring terminal position of the molded case circuit breaker to eliminate the arc generated when disconnecting the wire, but multiple vertical arc extinguishing grid plates are all embedded and fixed inside the arc extinguishing cover, so the arc extinguishing grid plates cannot be removed and replaced arbitrarily according to actual needs, and the energy and heat carried by some long arcs will cause a small amount of damage to the arc extinguishing grid plates. Therefore, the actual service life of the molded case circuit breaker with zero arcing will be affected. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem of the low service life of the molded case circuit breaker with zero arcing, and to propose a molded case circuit breaker with zero arcing.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] Design a molded case circuit breaker with zero arcing, including a molded case circuit breaker main body, a circuit breaker base, and an arc extinguishing cover. The molded case circuit breaker main body is fixedly installed above the circuit breaker base, the arc extinguishing cover is fixedly connected to both sides of the circuit breaker base, a detachable replacement structure for the arc extinguishing grid plates is arranged inside the arc extinguishing cover, and a zero arcing partition installation structure is arranged on both sides of the arc extinguishing cover.

[0007] Preferably, the removable and replaceable structure of the arc extinguishing grid includes positioning grooves and limiting slots, a plurality of the positioning grooves are fixedly opened at the top of the arc extinguishing cover, a plurality of the limiting slots are fixedly installed at the upper and lower ends of the arc extinguishing cover, the inner sides of the plurality of limiting slots are slidably connected with arc extinguishing grids, the interior of the arc extinguishing grids is fixedly provided with through holes, the tops of the plurality of arc extinguishing grids are rotatably connected with rotating shafts, the outer walls of the plurality of rotating shafts are fixedly connected with protrusions, and the tops of the plurality of rotating shafts are fixedly connected with manual wheels.

[0008] Preferably, the plurality of rotating shafts are arranged on the inner side of the positioning groove, the plurality of protrusions are movably connected to the inner wall of the positioning groove, and the plurality of arc-extinguishing grids are arranged parallel to and equidistant from each other.

[0009] Preferably, the zero-arcing chopper installation structure includes a connecting plate and an isolation plate, the connecting plate is fixedly installed on the outer side of the lower end of the arc extinguishing cover, the outer wall of the connecting plate is fixedly connected with a plurality of support bars, the top ends of the plurality of support bars are fixedly connected with a snap-in groove, and the isolation plate is slidably connected inside the snap-in groove.

[0010] Preferably, a plurality of wiring terminals are fixedly connected to the top of the circuit breaker base, and one side of the plurality of wiring terminals is arranged opposite to the inside of the arc extinguishing cover.

[0011] Preferably, the inner side of the bottom end of the arc extinguishing cover is fixedly connected to the outer wall of the circuit breaker base, the outer side of the molded case circuit breaker body is threadedly connected with a plurality of mounting screws, and the inner sides of the plurality of mounting screws are threadedly connected to the outer wall of the circuit breaker base.

[0012] The utility model provides a molded case circuit breaker with zero flashover, and the beneficial effect is that before inserting the arc extinguishing grid, the manual wheel is rotated to rotate the rotating shaft ninety degrees, and the rotating shaft will drive the protrusion to be arranged horizontally with the positioning groove, so that the arc extinguishing grid can smoothly enter the limiting slot, and when the arc extinguishing grid is fixed, the manual wheel is rotated again to make the rotating shaft drive the protrusion to rotate ninety degrees in the opposite direction, and the protrusion can be rotated and inserted into the concave part of the inner wall of the positioning groove to clamp the position of the arc extinguishing grid below, and the damaged and aged arc extinguishing grid can be replaced and disassembled without opening the arc extinguishing cover, thereby improving the service life of the molded case circuit breaker with zero flashover. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0014] Figure 2 for Figure 1 A front cross-sectional schematic diagram of

[0015] Figure 3 for Figure 1 A side cross-sectional schematic diagram of

[0016] Figure 4 is Figure 2 the enlarged sectional view of part A in

[0017] Figure 5 is Figure 2 the enlarged sectional view of part B in

[0018] Figure 6 is Figure 3 the enlarged sectional view of part C in

[0019] In the figure: 1. The main body of the molded case circuit breaker, 2. The circuit breaker base, 3. The arc extinguishing cover, 4. The installation screw, 5. The detachable and replaceable structure of the arc extinguishing grid, 51. The positioning groove, 52. The limit slot, 53. The arc extinguishing grid, 54. The through hole, 55. The manual wheel, 56. The rotating shaft, 57. The convex block, 6. The installation structure of the zero-flying arc partition plate, 61. The connecting plate, 62. The support bar, 63. The clamping groove, 64. The isolation plate, 7. The terminal. Specific embodiments

[0020] The following further describes the present utility model in conjunction with the accompanying drawings:

[0021] Embodiment 1:

[0022] Please refer to Figures 1-6 : In this embodiment, a molded case circuit breaker with zero-flying arc includes the main body 1 of the molded case circuit breaker, the circuit breaker base 2 and the arc extinguishing cover 3. The main body 1 of the molded case circuit breaker is fixedly installed above the circuit breaker base 2, and the arc extinguishing cover 3 is fixedly connected to both sides of the circuit breaker base 2. The detachable and replaceable structure 5 of the arc extinguishing grid is arranged inside the arc extinguishing cover 3, and the installation structure 6 of the zero-flying arc partition plate is arranged on both sides of the arc extinguishing cover 3. The arc extinguishing grid 53 arranged inside the arc extinguishing cover 3 has basically the same material working principle as the arc extinguishing grid 53 disclosed in a molded case circuit breaker with zero-flying arc with the publication number of "CN221239573U" and the name of a molded case circuit breaker with zero-flying arc, so no more description will be given here.

[0023] The detachable and replaceable structure 5 of the arc extinguishing grid includes a positioning groove 51 and a limit slot 52. A plurality of positioning grooves 51 are fixedly opened at the top of the arc extinguishing cover 3. The positioning grooves 51 are vertically grooved at the top of the arc extinguishing cover 3. A plurality of limit slots 52 are fixedly installed at the upper and lower ends of the arc extinguishing cover 3. The limit slots 52 can vertically insert the arc extinguishing grid 53 into them, so that the installation of the arc extinguishing grid 53 can be completed quickly. However, before inserting the arc extinguishing grid 53, first rotate the manual wheel 55 to make the rotating shaft 56 rotate 90 degrees. The rotating shaft 56 will drive the convex block 57 to be horizontally arranged with the positioning groove 51, so that the arc extinguishing grid 53 can smoothly enter the limit slot 52. The inner side of the plurality of limit slots 52 is slidably connected with the arc extinguishing grid 53, and a through hole 54 is fixedly opened inside the arc extinguishing grid 53.

[0024] After the arc extinguishing grid 53 is fixed, rotate the manual wheel 55 again so that the rotating shaft 56 drives the convex block 57 to rotate reversely by ninety degrees. The convex block 57 can rotate and insert into the recess on the inner wall of the positioning groove 51 to lock the position of the lower arc extinguishing grid 53. The tops of multiple arc extinguishing grids 53 are rotatably connected to the rotating shaft 56. The outer walls of multiple rotating shafts 56 are fixedly connected with convex blocks 57. The tops of multiple rotating shafts 56 are fixedly connected with manual wheels 55. Multiple rotating shafts 56 are arranged inside the positioning groove 51. Multiple convex blocks 57 are movably connected to the inner wall of the positioning groove 51. Multiple arc extinguishing grids 53 are arranged parallel and equidistant from each other.

[0025] The positioning groove 51 is vertically grooved at the top of the arc extinguishing cover 3. Multiple limiting slots 52 are fixedly installed at the upper and lower ends of the arc extinguishing cover 3. The limiting slots 52 can vertically insert the arc extinguishing grid 53 into them, so that the installation of the arc extinguishing grid 53 can be completed quickly. However, before inserting the arc extinguishing grid 53, first rotate the manual wheel 55 to make the rotating shaft 56 rotate by ninety degrees. The rotating shaft 56 will drive the convex block 57 to be horizontally arranged with the positioning groove 51, so that the arc extinguishing grid 53 can smoothly enter the limiting slot 52. After the arc extinguishing grid 53 is fixed, rotate the manual wheel 55 again so that the rotating shaft 56 drives the convex block 57 to rotate reversely by ninety degrees. The convex block 57 can rotate and insert into the recess on the inner wall of the positioning groove 51 to lock the position of the lower arc extinguishing grid 53. It is possible to replace and disassemble the damaged or aged arc extinguishing grid plate 53 without opening the arc extinguishing cover 3, which improves the service life of the molded case circuit breaker with zero arcing.

[0026] The zero-arcing partition installation structure 6 includes a connecting plate 61 and a partition plate 64. The connecting plate 61 is fixedly installed on the outer side of the lower end of the arc extinguishing cover 3. The connecting plate 61 is welded and fixed on the outer side of the arc extinguishing cover 3. The connecting plate 61 can play a role in fixing multiple extended support bars 62. Multiple support bars 62 are fixedly connected to the outer wall of the connecting plate 61. The width of the card slot 63 on the inner side of the support bar 62 is consistent with the width of the partition plate 64. The partition plate 64 can be horizontally slid and inserted into the card slot 63 for docking installation. The partition plate 64 can separate the spaces between multiple adjacent terminal blocks and the inner side of the arc extinguishing cover 3, protecting the operator from electric shock and danger. Multiple support bars 62 are fixedly connected with card slots 63 at the top. The partition plate 64 is slidably connected inside the card slot 63.

[0027] Working principle:

[0028] When the molded case circuit breaker with zero flashover is used, the assembled molded case circuit breaker with zero flashover is installed between the circuit equipment connection wires, and the connection wires are connected to the connection terminals 7 on both sides of the molded case circuit breaker with zero flashover. In this way, when the molded case circuit breaker with zero flashover is opened or closed, the arc extinguishing grid inside the arc extinguishing cover 3 can reduce the arc hazard generated when the circuit is separated. By setting a plurality of arc extinguishing grids, the arc that cannot be eliminated is eliminated, thereby achieving zero flashover:

[0029] Arc extinguishing grid disassembly structure of molded case circuit breaker with zero arcing:

[0030] The positioning groove 51 is vertically grooved at the top of the arc extinguishing cover 3, and a plurality of limiting slots 52 are fixedly installed at the upper and lower ends of the arc extinguishing cover 3. The limiting slots 52 can vertically insert the arc extinguishing grid 53 therein, so that the arc extinguishing grid 53 can be quickly installed. However, before inserting the arc extinguishing grid 53, the manual wheel 55 is first rotated to rotate the rotating shaft 56 by ninety degrees, and the rotating shaft 56 will drive the protrusion 57 to be arranged horizontally with the positioning groove 51, so that the arc extinguishing grid 53 can smoothly enter the limiting slot 52. When the arc extinguishing grid 53 is fixed, the manual wheel 55 is rotated again to make the rotating shaft 56 drive the protrusion 57 to rotate ninety degrees in the opposite direction, and the protrusion 57 can be rotated and inserted into the concave part of the inner wall of the positioning groove 51 to clamp the position of the arc extinguishing grid 53 below, so that the damaged and aged arc extinguishing grid plate 53 can be replaced and disassembled without opening the arc extinguishing cover 3;

[0031] Molded case circuit breaker isolation board plug-in structure with zero arcing:

[0032] The connecting plate 61 is welded and fixed to the outer side of the arc-extinguishing cover 3. The connecting plate 61 can fix multiple extended support strips 62. The width of the inner side snap-in groove 63 of the support strip 62 matches the width of the isolation plate 64. The isolation plate 64 can be slid laterally into the snap-in groove 63 for docking installation. The isolation plate 64 can separate multiple adjacent terminal blocks and the inner space of the arc-extinguishing cover 3 to protect the operator from the danger of electric shock.

[0033] Embodiment 2:

[0034] See also Figures 1-6: In this embodiment, a molded case circuit breaker with zero arcing also includes a plurality of terminal blocks 7 fixedly connected above the circuit breaker base 2. The terminal blocks 7 are made of copper-nickel alloy and have good electrical conductivity, and can be used for the circuit breaker to access the guide for connection. One side of the plurality of terminal blocks 7 is disposed opposite to the inside of the arc extinguishing cover 3. The inner bottom end of the arc extinguishing cover 3 is fixedly connected to the outer wall of the circuit breaker base 2. A plurality of mounting screws 4 are threadedly connected to the outside of the molded case circuit breaker body 1. There are a plurality of mounting screws 4, and the mounting screws 4 can tighten the circuit breaker base 2 and the upper molded case circuit breaker body 1 to achieve installation. The inside of the plurality of mounting screws 4 is threadedly connected to the outer wall of the circuit breaker base 2.

[0035] Working principle:

[0036] The terminal blocks 7 are made of copper-nickel alloy and have good electrical conductivity, and can be used for the circuit breaker to access the guide for connection. A plurality of mounting screws 4 are threadedly connected to the outside of the molded case circuit breaker body 1. There are a plurality of mounting screws 4, and the mounting screws 4 can tighten the circuit breaker base 2 and the upper molded case circuit breaker body 1 to achieve installation.

[0037] Although the present utility model has been illustrated and described by reference to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. A molded case circuit breaker with zero arcing, comprising a molded case circuit breaker body (1), a circuit breaker base (2) and an arc extinguishing cover (3), wherein the arc extinguishing cover (3) is fixedly connected to both sides of the circuit breaker base (2), and the molded case circuit breaker body (1) is fixedly installed above the circuit breaker base (2), characterized in that: The inside of the arc extinguishing cover (3) is provided with a detachable and replaceable structure (5) for arc extinguishing grid plates, and both sides of the arc extinguishing cover (3) are provided with a zero flashover partition installation structure (6).

2. The molded case circuit breaker with zero arcing as claimed in claim 1, wherein: The detachable and replaceable structure (5) for arc extinguishing grid plates includes a positioning groove (51) and a limiting slot (52). A plurality of the positioning grooves (51) are fixedly formed at the top end of the arc extinguishing cover (3), and a plurality of the limiting slots (52) are fixedly installed at the upper and lower ends of the arc extinguishing cover (3). An arc extinguishing grid plate (53) is slidably connected to the inner side of a plurality of the limiting slots (52). A through hole (54) is fixedly formed in the inside of the arc extinguishing grid plate (53). A rotating shaft (56) is rotatably connected to the top end of a plurality of the arc extinguishing grid plates (53). A convex block (57) is fixedly connected to the outer wall of a plurality of the rotating shafts (56). A manual wheel (55) is fixedly connected to the top end of a plurality of the rotating shafts (56).

3. The molded case circuit breaker with zero arcing as claimed in claim 2, wherein: A plurality of the rotating shafts (56) are arranged inside the positioning groove (51), a plurality of the convex blocks (57) are movably connected to the inner wall of the positioning groove (51), and a plurality of the arc extinguishing grid plates (53) are arranged parallel to each other at equal intervals.

4. A molded case circuit breaker with zero arcing as claimed in claim 1, characterized in that: The zero flashover partition installation structure (6) includes a connecting plate (61) and a partition plate (64). The connecting plate (61) is fixedly installed on the outer side of the lower end of the arc extinguishing cover (3). A plurality of support bars (62) are fixedly connected to the outer wall of the connecting plate (61). A clamping groove (63) is fixedly connected to the top end of a plurality of the support bars (62). The partition plate (64) is slidably connected inside the clamping groove (63).

5. A molded case circuit breaker with zero arcing as claimed in claim 1, characterized in that: A plurality of wiring terminals (7) are fixedly connected above the circuit breaker base (2), and one side of a plurality of the wiring terminals (7) is arranged opposite to the inside of the arc extinguishing cover (3).

6. The molded case circuit breaker with zero arc-flash according to claim 1, wherein: The inner side of the bottom end of the arc extinguishing cover (3) is fixedly connected to the outer wall of the circuit breaker base (2). A plurality of mounting screws (4) are threadedly connected to the outside of the molded case circuit breaker body (1), and the inside of a plurality of the mounting screws (4) is threadedly connected to the outer wall of the circuit breaker base (2).

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