Environment-friendly circuit breaker

Abstract

The utility model discloses an environment-friendly circuit breaker, which comprises a vacuum arc-extinguishing chamber, an upper isolating switch comprises a movable knife holder, the vacuum arc-extinguishing chamber comprises a static end, the static end is provided with four fixing points and is fixedly connected with the movable knife holder through the fixing points, the movable knife holder comprises a connecting end and an installing end, the connecting end is fixedly arranged at the installing end to form a T-shaped structure, and the installing end is fixedly connected with the upper isolating switch. According to the utility model, the structure of the conductive copper piece is optimized, the heat dissipation area is increased, the heat dissipation efficiency is effectively improved, and the 1250A * 1.1 temperature rise test requirement is realized in dry air.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical technical field relates to a kind of environmental protection circuit breaker. BACKGROUND

[0002] With the tide of global green manufacturing, the traditional sulfur hexafluoride gas (greenhouse gas) ring network cabinet will eventually be replaced by green dry air gas, and various manufacturers have developed environmental protection gas cabinet.

[0003] With the popularization of State Grid in 2023, 12kA / 630A environmental protection cabinet replaces sulfur hexafluoride gas ring network cabinet year by year, but it is difficult to replace 1250A specification ring network cabinet. The difficulty lies in 1. The heat dissipation of dry air is only one third of that of sulfur hexafluoride gas, and the heat dissipation performance of environmental protection cabinet is poor; 2. The structure of the wrapped isolation knife is not conducive to heat dissipation; The upper limit parameter of 1250A ring network cabinet in actual operation can only meet 1.0 times temperature rise test. SUMMARY

[0004] The utility model discloses in order to overcome the at least one prior art's insufficient, provide a kind of environmental protection circuit breaker.

[0005] In order to achieve the above purpose, the utility model discloses the following technical scheme: a kind of environmental protection circuit breaker, including vacuum arc-extinguishing chamber, upper isolator includes moving knife holder, vacuum arc-extinguishing chamber includes static end, and static end is equipped with four fixed points, and static end is connected with moving knife holder by fixed point and is fixedly connected.

[0006] Further, the moving knife holder includes a connecting end and a mounting end, the connecting end is fixedly arranged in the mounting end to form a T-shaped structure, and the connecting end is a flat plate structure.

[0007] Further, the mounting end is provided with four mounting holes, the four mounting holes are symmetrically distributed in pairs with the connecting end as the center, the fixed points are opposite to the four mounting holes, and the fasteners connect the mounting holes and the fixed points to tightly connect the mounting end with the vacuum arc-extinguishing chamber.

[0008] Further, it further includes a circuit breaker frame, a circuit breaker transmission component, a circuit breaker main shaft, a mounting assembly and a branch copper bar, the circuit breaker main shaft is rotatably connected with the circuit breaker frame, the circuit breaker transmission component is connected with the circuit breaker main shaft and the vacuum arc-extinguishing chamber, the mounting assembly supports the vacuum arc-extinguishing chamber, and the branch copper bar is arranged in a soft connection structure.

[0009] Further, the circuit breaker frame includes a circuit breaker front plate, a circuit breaker rear plate, a circuit breaker first side plate and a circuit breaker second side plate, and the circuit breaker first side plate and the circuit breaker second side plate are fixedly connected at both ends of the circuit breaker front plate and the circuit breaker rear plate.

[0010] Further, the first side plate of the circuit breaker is provided with a fifth bent plate and a sixth bent plate, the fifth bent plate of the first side plate of the circuit breaker is connected with the front plate of the circuit breaker through bolt fastening, and the sixth bent plate of the first side plate of the circuit breaker is connected with the rear plate of the circuit breaker through bolt fastening.

[0011] Further, the installation assembly comprises an upper installation plate and a lower installation plate, the upper installation plate and the lower installation plate are clamped with the circuit breaker frame, and the moving knife holder is connected with the vacuum arc-extinguishing chamber through the upper installation plate.

[0012] Further, the upper installation plate is provided with a through slot and a ring slot, the through slot and the ring slot are communicated, the upper installation plate is further provided with a plurality of through holes, the through holes are symmetrically distributed in pairs with the through slot as the center, the through holes are one-to-one corresponding to the mounting holes and the fixing points, the connecting end of the moving knife holder penetrates through the through slot, and the mounting end and the static end are arranged in the ring slot; and the fastener connects the through holes, the mounting holes and the fixing points to fasten the upper installation plate, the moving knife holder and the vacuum arc-extinguishing chamber.

[0013] Further, the front plate of the circuit breaker and the rear plate of the circuit breaker are provided with horizontal notches, the branch copper bar comprises a horizontal forming plate and a vertical forming plate, the horizontal forming plate penetrates through the horizontal notches and is overlapped on the front plate of the circuit breaker and the rear plate of the circuit breaker, the branch copper bar is connected with the vacuum pull rod of the vacuum arc-extinguishing chamber, and the vertical forming plate is arranged outside the circuit breaker frame and is fixedly connected with the circuit breaker frame through bolts.

[0014] Further, the output end of the circuit breaker main shaft is rotationally connected with the first side plate of the circuit breaker, and the input end of the circuit breaker main shaft penetrates through the second side plate of the circuit breaker and is movably sealed with the second side plate of the circuit breaker.

[0015] In summary, the utility model has the advantages that:

[0016] 1) The connecting end of the moving knife holder is a flat plate structure, effectively increasing the heat dissipation area.

[0017] 2) The mounting end of the moving knife holder is provided with four mounting holes, the four mounting holes are symmetrically distributed in pairs with the connecting end as the center, the static end of the vacuum arc-extinguishing chamber is provided with fixing points opposite to the four mounting holes, the fastener connects the mounting holes and the fixing points to fasten the mounting end and the vacuum arc-extinguishing chamber, and the symmetrical structure of the mounting holes and the fixing points can reduce the horizontal width of the main circuit, facilitate the subsequent expansion of the lower isolation structure, and reduce the overall height.

[0018] 3) The branch copper bar is a soft connection structure as a whole, and the overlapping point is removed, so that the heat dissipation capacity of the conductive part is improved; in addition, the soft connection is a copper foil structure pressed and injected, the surface area of the copper foil is larger, and the heat dissipation area is larger, so that the heat dissipation efficiency is effectively improved.

[0019] 4) The utility model discloses a structure optimization to conductive copper spare, promote the heat dissipation area, effectively improve the heat dissipation efficiency, realize the temperature rise test requirement of A in dry air. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the one direction axonometric drawing of the circuit breaker structure of the utility model.

[0021] Figure 2 It is the another direction axonometric drawing of the circuit breaker structure of the utility model.

[0022] Figure 3 It is the side view of the circuit breaker structure of the utility model.

[0023] Figure 4 It is the schematic diagram of the moving knife holder of the utility model.

[0024] Figure 5 It is the one direction axonometric drawing of the upper mounting plate of the utility model.

[0025] Figure 6 It is the another direction axonometric drawing of the upper mounting plate of the utility model.

[0026] Figure 7 It is the assembly axonometric drawing of the moving knife holder and the upper mounting plate of the utility model.

[0027] Figure 8 It is the axonometric drawing of the vacuum arc-extinguishing chamber of the utility model. DETAILED DESCRIPTION

[0028] The implementation of the utility model will be described below through specific examples, and other advantages and effects of the utility model can be easily understood by those skilled in the art according to the disclosure of the specification. The utility model can also be implemented or applied through different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0029] It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the utility model in a schematic manner, and only the components related to the utility model are shown in the diagrams, not the number, shape and size of the components during actual implementation. The shape, number and proportion of each component during actual implementation can be changed arbitrarily, and the component layout pattern can also be more complex.

[0030] The all directionality indications (such as up, down, left, right, front, back, transverse, longitudinal, and the like) in the embodiments of the utility model are only used for explaining the relative position relationship, movement condition and the like between the components in a certain specific posture, and if the specific posture is changed, the directionality indications are also changed accordingly.

[0031] Due to installation errors and the like, the parallel relationship in the embodiments of the utility model may be actually an approximate parallel relationship, and the perpendicular relationship may be actually an approximate perpendicular relationship.

[0032] Embodiment one:

[0033] As shown in Figures 1-8 An environmental protection circuit breaker is connected with the upper isolating switch, and the environmental protection circuit breaker comprises a vacuum arc-extinguishing chamber 21, and the upper isolating switch comprises a moving knife holder 122, and the vacuum arc-extinguishing chamber 21 comprises a static end 211, and the static end 211 is provided with four fixing points 2111, and the static end 211 is fixedly connected with the moving knife holder 122 through the fixing points 2111.

[0034] The moving knife holder 122 is provided in a T-shaped structure and comprises a connecting end 1221 and a mounting end 1222, the connecting end 1221 is fixedly arranged on the mounting end 1222 to form a T-shaped structure, the connecting end 1221 is connected with a moving knife of the upper isolating switch, and compared with the existing round bar type moving knife holder, the connecting end 1221 is a flat plate structure, so that the heat dissipation area is effectively increased.

[0035] The mounting end 1222 is provided with four mounting holes 1223, the four mounting holes 1223 are symmetrically distributed in pairs with the connecting end 1221 as the center, the static end 211 of the vacuum arc-extinguishing chamber 21 is provided with the fixing points 2111 opposite to the four mounting holes 1223, and a fastener such as a screw or a bolt is connected with the mounting hole 1223 and the fixing point 2111 to fasten and connect the mounting end 1222 and the vacuum arc-extinguishing chamber 21, and the symmetric structure of the mounting hole 1223 and the fixing point 2111 can reduce the transverse width of a main circuit, facilitate subsequent expansion of a lower isolating structure and reduction of the overall height.

[0036] The circuit breaker further comprises a circuit breaker frame 20, a circuit breaker transmission component 22, a circuit breaker main shaft 23, a mounting assembly 24 and a branch copper bar 25, the circuit breaker main shaft 23 is rotationally connected with the circuit breaker frame 20, the circuit breaker transmission component 22 is connected with the circuit breaker main shaft 23 and the vacuum arc-extinguishing chamber 21, the circuit breaker main shaft 23 transmits the movement to a moving end of the vacuum arc-extinguishing chamber 21 through the circuit breaker transmission component 22 to realize disconnection or separation of the moving contact and the static contact, the mounting assembly 24 supports the vacuum arc-extinguishing chamber 21, and the branch copper bar 25 is provided in a soft connection structure.

[0037] The circuit breaker frame 20 comprises a circuit breaker front plate 204, a circuit breaker back plate 202, a circuit breaker first side plate 201 and a circuit breaker second side plate 203. The circuit breaker front plate 204 and the circuit breaker back plate 202 are arranged in parallel. The circuit breaker first side plate 201 and the circuit breaker second side plate 203 are arranged in parallel and are fixedly connected at two ends of the circuit breaker front plate 204 and the circuit breaker back plate 202.

[0038] The circuit breaker first side plate 201 is connected to the circuit breaker front plate 204 and the circuit breaker back plate 202. Specifically, the circuit breaker first side plate 201 is provided with a fifth bent plate and a sixth bent plate on both sides. The circuit breaker front plate 204 is connected to the fifth bent plate of the circuit breaker first side plate 201 by bolt fastening. The circuit breaker back plate 202 is connected to the sixth bent plate of the circuit breaker first side plate 201 by bolt fastening. The circuit breaker second side plate 203 is connected to the circuit breaker front plate 204 and the circuit breaker back plate 202 in the same way as described above, and thus will not be described again.

[0039] The circuit breaker first side plate 201 and the circuit breaker second side plate 203 are fixedly connected to the disconnecting switch frame of the upper disconnecting switch to realize the connection between the circuit breaker and the upper disconnecting switch.

[0040] The mounting assembly 24 comprises an upper mounting plate 241 and a lower mounting plate 242. The upper mounting plate 241 and the lower mounting plate 242 are arranged on the upper and lower sides of the vacuum arc-extinguishing chamber 21 to support the vacuum arc-extinguishing chamber 21. The upper mounting plate 241 and the lower mounting plate 242 are clamped to the circuit breaker front plate 204 and the circuit breaker back plate 202.

[0041] The vacuum arc-extinguishing chamber 21 comprises a static end 211 and a moving end 212. The static end 211 is connected to the moving knife seat 122 through the upper mounting plate 241. The moving end 212 is connected to the circuit breaker transmission component 22 through a vacuum pull rod 213.

[0042] The moving knife seat 122 is connected to the vacuum arc-extinguishing chamber 21 through the upper mounting plate 241. Specifically, the upper mounting plate 241 is provided with a through slot 2411 and a ring slot 2413 in the thickness direction. The through slot 2411 and the ring slot 2413 are connected. The upper mounting plate 241 is also provided with a plurality of through holes 2412. The through holes 2412 are symmetrically distributed in pairs with the through slot 2411 as the center. The through holes 2412 correspond to the mounting holes 1223 and the fixed points 2111 in one-to-one correspondence. The connecting end 1221 of the moving knife seat 122 penetrates the through slot 2411. The mounting end 1222 and the static end 211 are arranged in the ring slot 2413. Fasteners such as screws and bolts are connected to the through holes 2412, the mounting holes 1223 and the fixed points 2111 to fasten the upper mounting plate 241, the moving knife seat 122 and the vacuum arc-extinguishing chamber 21.

[0043] The conventional branch copper bar is a structure combined with a soft connection and a copper bar, and the structure increases a lap joint between the two, improves the loop resistance, and is not easy to dissipate heat, and the branch copper bar 25 is a soft connection structure as a whole, and removes the lap joint, thereby improving the heat dissipation capacity of the conductive part; in addition, the soft connection is a pressed copper foil structure, the copper foil has a larger surface area, has a larger heat dissipation area, and thereby effectively improves the heat dissipation efficiency.

[0044] The branch copper bar 25 is provided in an L shape, and the branch copper bar 25 is connected with the circuit breaker frame 20, specifically, the circuit breaker front plate 204 and the circuit breaker rear plate 202 are provided with horizontal notches, the branch copper bar 25 includes a horizontal profiled plate and a vertical profiled plate, the horizontal profiled plate passes through the horizontal notches and is lapped on the circuit breaker front plate 204 and the circuit breaker rear plate 202, the branch copper bar 25 between the circuit breaker front plate 204 and the circuit breaker rear plate 202 is connected with the vacuum pull rod 213, and the vertical profiled plate is located outside the circuit breaker frame 20 and is fixedly connected with the circuit breaker frame 20 through bolts.

[0045] The output end of the circuit breaker main shaft 23 is rotationally connected with the circuit breaker first side plate 201, and the input end of the circuit breaker main shaft 23 penetrates the circuit breaker second side plate 203 and is dynamically sealed with the circuit breaker second side plate 203.

[0046] The structure of the circuit breaker transmission component 22 of the embodiment adopts the structure provided in the conventional circuit breaker structure, selects the model based on the circuit breaker structure, and is not improved in the application, and is not limited and described here

[0047] The circuit breaker structure in the embodiment can be independently applied to the existing equipment, and the structures not described in the circuit breaker structure adopt the existing components, and are not described here.

[0048] Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

Claims

1. An environmentally friendly circuit breaker connected to an upper disconnecting switch, characterized in that: The upper isolator includes a moving knife holder, and the vacuum arc-extinguishing chamber includes a static end, which is provided with four fixing points and is fixedly connected with the moving knife holder through the fixing points.

2. The environmentally friendly circuit breaker of claim 1, wherein: The moving knife holder includes a connecting end and a mounting end, the connecting end is fixedly arranged on the mounting end to form a T-shaped structure, and the connecting end is in a flat plate structure.

3. The environmentally friendly circuit breaker of claim 2, wherein: The mounting end is provided with four mounting holes, the four mounting holes are symmetrically distributed in pairs with the connecting end as the center, the fixing points are opposite to the four mounting holes, and the fasteners connect the mounting holes and the fixing points to tightly connect the mounting end and the vacuum arc-extinguishing chamber.

4. The environmentally friendly circuit breaker of claim 1, wherein: The circuit breaker further includes a circuit breaker frame, a circuit breaker transmission component, a circuit breaker main shaft, a mounting assembly and a branch copper bar, the circuit breaker main shaft is rotationally connected with the circuit breaker frame, the circuit breaker transmission component is connected with the circuit breaker main shaft and the vacuum arc-extinguishing chamber, the mounting assembly supports the vacuum arc-extinguishing chamber, and the branch copper bar is in a soft connection structure.

5. The environmentally friendly circuit breaker of claim 4, wherein: The circuit breaker frame includes a circuit breaker front plate, a circuit breaker rear plate, a circuit breaker first side plate and a circuit breaker second side plate, the circuit breaker first side plate and the circuit breaker second side plate are fixedly connected at two ends of the circuit breaker front plate and the circuit breaker rear plate.

6. An environmentally friendly circuit breaker according to claim 5, characterized in that: The fifth bent plate and the sixth bent plate are arranged on both sides of the circuit breaker first side plate, the circuit breaker front plate is tightly connected with the fifth bent plate of the circuit breaker first side plate through bolts, and the circuit breaker rear plate is tightly connected with the sixth bent plate of the circuit breaker first side plate through bolts.

7. The environmentally friendly circuit breaker of claim 4, wherein: The mounting assembly includes an upper mounting plate and a lower mounting plate, the upper mounting plate and the lower mounting plate are clamped with the circuit breaker frame, and the moving knife holder is connected with the vacuum arc-extinguishing chamber through the upper mounting plate.

8. The environmentally friendly circuit breaker of claim 7, wherein: The upper mounting plate is provided with a through slot and a ring slot, the through slot and the ring slot are communicated, the upper mounting plate is further provided with a plurality of through holes, the through holes are symmetrically distributed in pairs with the through slot as the center, the through holes correspond to the mounting holes and the fixing points in one-to-one mode, the connecting end of the moving knife holder penetrates through the through slot, and the mounting end and the static end are arranged in the ring slot, the fasteners connect the through holes, the mounting holes and the fixing points to tightly connect the upper mounting plate, the moving knife holder and the vacuum arc-extinguishing chamber.

9. The environmentally friendly circuit breaker of claim 5, wherein: The circuit breaker front plate and the circuit breaker rear plate are provided with horizontal notches, the branch copper bar includes a horizontal forming plate and a vertical forming plate, the horizontal forming plate penetrates through the horizontal notches and is lapped on the circuit breaker front plate and the circuit breaker rear plate, the branch copper bar is connected with a vacuum pull rod of the vacuum arc-extinguishing chamber, and the vertical forming plate is arranged outside the circuit breaker frame and is fixedly connected with the circuit breaker frame through bolts.

10. The environmentally friendly circuit breaker of claim 4, wherein: The output end of the circuit breaker main shaft is rotationally connected with the circuit breaker first side plate, and the input end of the circuit breaker main shaft penetrates through the circuit breaker second side plate and is dynamically sealed with the circuit breaker second side plate.

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