An isolating circuit breaker

Abstract

The present application relates to the technical field of circuit breakers, and discloses an isolating circuit breaker, including a shell, a moving contact is rotatably connected to the shell, a static contact and a grounding contact are arranged on the shell, the moving contact can abut against the static contact or the grounding contact, and a driving structure is arranged on the moving contact, the driving structure includes a driving rod, a rocker, and a connecting rod, the driving rod is rotatably connected to the shell, one end of the rocker is fixedly connected to the driving rod, and the other end of the rocker is rotatably connected to the connecting rod, and the connecting rod is rotatably connected to the moving contact. In the present application, since the connecting rod is arranged on the moving contact, the force arm of the driving rod driving the moving contact is increased. Due to the lever principle, the driving rod can realize that the moving contact can be more easily rotated under the same force, and realize the rapid rotation of the moving contact, so that the moving contact can be quickly separated or connected with the static contact, so that the isolating circuit breaker can quickly cut off the fault circuit and prevent the fault current from further damaging the switching device.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to an isolating circuit breaker. Background Art

[0002] With the development of switchgear, there are higher requirements for circuit safety. As a kind of switchgear, isolating circuit breakers also require higher safety performance. Isolating circuit breakers are usually placed in environmentally friendly gas to improve insulation safety performance. Isolating circuit breakers are circuit breakers that meet the requirements of isolating switches when the contacts are in the open position. It integrates the functions of isolating switches and circuit breakers.

[0003] In the related art, the isolating circuit breaker includes a shell, on which a moving contact, a stationary contact and a grounding contact are provided, a driving rod is rotatably connected to the shell, the moving contact is fixedly connected to the driving rod, and the stationary contact and the grounding contact are arranged on the shell. When the moving contact abuts against the stationary contact, it is the first working position, when the moving contact abuts against the grounding contact, it is the second working position, and when the moving contact does not abut against the stationary contact or the grounding contact, it is the third working position.

[0004] When opening and closing the switch, people rotate the driving rod. Since the moving contact is arranged on the driving rod, the force arm of the driving rod to drive the moving contact is small. Therefore, it is more laborious for people to rotate the moving contact, which is inconvenient for people to perform the opening and closing operations. Summary of the invention

[0005] In order to improve the problem of laborious rotation of a moving contact, the present application provides an isolating circuit breaker.

[0006] The present application provides an isolating circuit breaker, which adopts the following technical solution:

[0007] A disconnecting circuit breaker comprises a shell, a moving contact is rotatably connected to the shell, a stationary contact and a grounding contact are provided on the shell, the moving contact can abut against the stationary contact or the grounding contact, a driving structure is provided on the moving contact, the driving structure comprises a driving rod, a rocker, and a connecting rod, the driving rod is rotatably connected to the shell, one end of the rocker is fixedly connected to the driving rod, the other end of the rocker is rotatably connected to the connecting rod, and the connecting rod is rotatably connected to the moving contact.

[0008] By adopting the above technical solution, the driving rod drives the moving contact to rotate through the rocker and the connecting rod. Normally, the driving rod directly drives the moving contact to rotate, and the force arm of the driving rod and the moving contact is small. Since the connecting rod is arranged on the moving contact, the force arm of the driving rod driving the moving contact is increased. Due to the lever principle, the driving rod can make the moving contact easier to rotate under the same force, and realize the rapid rotation of the moving contact, so that the moving contact can be quickly separated or connected with the static contact, so that the isolating circuit breaker can quickly cut off the fault circuit and prevent the fault current from further damaging the switching device.

[0009] Optionally, a rotating rod is rotatably connected to the housing, the moving contact is rotatably connected to the rotating rod, and an umbrella skirt is provided on the rotating rod.

[0010] By adopting the above technical solution, the moving contact is rotatably connected to the rotating rod, and the rotating rod is provided with an umbrella skirt, so that the creepage distance of the rotating rod is increased, the insulation safety performance of the rotating rod is further improved, and the isolating circuit breaker is not easily damaged.

[0011] Optionally, the moving contact includes two swing rods, between which a static contact or a grounding contact is inserted, and a first bolt and a second bolt are threadedly connected to the swing rod, and the first bolt is provided with a receiving groove for threaded connection of the second bolt, and when the first bolt is inserted into the receiving groove, the first bolt and the second bolt are fixed to each other.

[0012] By adopting the above technical solution, the first bolt is threadedly connected to the accommodating groove to achieve mutual fixation of the first bolt and the second bolt, so that the two swing arms can be fixed to each other, and the distance between the two swing arms can be fixed, so that the static contact or the grounding contact can be stably inserted between the two swing arms, thereby achieving the connection between the moving contact and the static contact or the connection between the moving contact and the grounding contact.

[0013] Optionally, a fixing spring is sleeved on the first bolt, and the fixing spring is located between the swing rod and the head of the first bolt. When the fixing spring is installed on the swing rod, the fixing spring pushes the swing rod to move in the direction of the other swing rod.

[0014] By adopting the above technical solution, a fixed spring is sleeved on the first bolt, so that the fixed spring pushes the swing rod to move toward the other swing rod, so that the two swing rods can be more compact, so that the swing rod can better abut the static contact or the grounding contact.

[0015] Optionally, a rotating seat is provided on the connecting rod, a slot is provided on the moving contact, a first block for inserting between the two swing rods is provided on the rotating seat, a second block for inserting into the slot is provided on the block, and an installation sleeve is slidably connected to the moving contact, and the installation sleeve can block the path of the second block from escaping from the slot.

[0016] By adopting the above technical solution, the first card block is inserted between the two swing rods. At this time, the second card block is located in the card slot. People then slide the installation sleeve to allow the installation sleeve to block the path of the second card block from escaping the card slot, so that the rotating seat can be fixed on the moving contact. The installation sleeve strengthens the fixation of the rotating seat and reduces the possibility of the rotating seat escaping from the moving contact. At the same time, people only need to insert the rotating seat and the sliding installation sleeve to achieve installation, so that people can achieve installation and fixation of the rotating seat and the installation sleeve, reducing people's operating steps.

[0017] Optionally, a limit strip is slidably connected to the rotating seat, and a limit hole for inserting the limit strip is opened on the mounting sleeve. When the limit strip is inserted into the limit hole, the mounting sleeve is fixed on the rotating seat.

[0018] By adopting the above technical solution, the limit bar is inserted into the limit hole, and the hole wall of the limit hole limits the limit bar, so that the rotating seat can fix the mounting sleeve, so that the mounting sleeve is not easy to slide in the moving contact, and the mounting sleeve can be further fixed, so that the connection between the mounting sleeve and the rotating seat is more reliable.

[0019] Optionally, a linkage bar is provided on the mounting sleeve, a linkage groove for inserting the linkage bar is provided on the rotating seat, a through hole connected to the linkage groove is provided on the rotating seat, and the limit bar is slidably connected in the through hole. When the linkage bar is inserted into the linkage groove, the linkage bar pushes the limit bar to insert into the limit hole.

[0020] By adopting the above technical solution, people slide the installation sleeve and insert the linkage bar into the linkage groove, so that the linkage bar pushes the limit bar to slide until the limit bar is inserted into the limit hole, so that the limit bar can automatically lock the installation sleeve, so that the installation sleeve and the rotating seat can be locked with each other, avoiding separation between the installation sleeve and the rotating seat during the rotation of the moving contact.

[0021] Optionally, a receiving hole is provided on the mounting sleeve, a receiving plate is slidably connected in the receiving hole, the linkage bar is slidably connected to the receiving plate, a push spring is provided on the rotating seat, and the push spring drives the receiving plate to abut against the moving contact.

[0022] By adopting the above technical solution, people pull the accommodating plate to insert the linkage bar into the slot, and then push the installation sleeve to insert the linkage bar into the linkage slot to lock the installation sleeve; at this time, the slot does not need to penetrate along the length direction of the swing rod, so that the overall structural strength of the swing rod will not be reduced; by pushing the spring to drive the accommodating plate to abut the moving contact, the accommodating plate can fit the swing rod, making it difficult for the accommodating plate and the swing rod to slide relative to each other, further increasing the reliability between the installation sleeve and the moving contact.

[0023] Optionally, a mounting hole is provided on the rotating seat, a mounting rod for inserting into the mounting hole is provided on the connecting rod, a stop rod is slidably connected in the mounting hole, and a stop groove for inserting the stop rod is provided on the mounting sleeve. When the mounting rod is inserted into the mounting hole, the mounting rod pushes the stop rod into the stop groove, and the mounting sleeve and the rotating seat are fixed to each other.

[0024] By adopting the above technical solution, the mounting rod is inserted into the mounting hole, and the mounting rod pushes the stop rod to move, so that the stop rod is inserted into the stop groove. The groove wall of the stop groove restricts the stop rod, so that the stop rod can limit the mounting sleeve, and further the mounting sleeve and the stop rod can be fixed to each other.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The driving rod drives the moving contact to rotate through the rocker and the connecting rod. Normally, the driving rod directly drives the moving contact to rotate, and the force arm of the driving rod and the moving contact is small. Since the connecting rod is arranged on the moving contact, the force arm of the driving rod driving the moving contact is increased. Due to the lever principle, the driving rod can make the moving contact easier to rotate under the same force, realize the rapid rotation of the moving contact, and allow the moving contact to be quickly separated or connected with the static contact, so that the isolating circuit breaker can quickly cut off the fault circuit and prevent the fault current from further damaging the switching device.

[0027] 2. The moving contact is rotatably connected to the rotating rod, and an umbrella skirt is provided on the rotating rod, so that the creepage distance of the rotating rod is increased, the insulation safety performance of the rotating rod is further improved, and the isolating circuit breaker is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of Example 1;

[0029] Figure 2 is a structural schematic diagram highlighting the moving contact in Example 1;

[0030] Figure 3 is along Figure 2 Partial cross-sectional view along line AA;

[0031] Figure 4 is a schematic structural diagram of Example 2;

[0032] Figure 5 is an exploded schematic diagram highlighting the first card block in Example 2;

[0033] Figure 6 is a cross-sectional view highlighting the mounting sleeve in Embodiment 2;

[0034] Figure 7 yes Figure 6 A magnified schematic diagram of part B;

[0035] Figure 8 It is an exploded schematic diagram highlighting the rotating seat in Example 2.

[0036] Figure numerals: 1, housing; 11, shield; 12, isolation plate; 2, moving contact; 21, rotating rod; 22, umbrella skirt; 23, swing rod; 231, perforation; 24, first bolt; 241, second bolt; 242, receiving groove; 25, fixing cover; 251, fixing groove; 252, fixing spring; 26, card slot; 3, static contact; 31, grounding contact; 32, pad; 4, driving structure; 41, driving rod; 42, rocker; 421, driving hole; 43, connecting rod; 5, rotating seat; 51, first clamping block; 52, second clamping block; 521, linkage groove; 522, through hole; 523, limiting strip; 53, pushing spring; 531, pushing plate; 54, mounting hole; 541, mounting rod; 542, stop hole; 543, stop rod; 6, mounting sleeve; 61, accommodating hole; 62, accommodating plate; 621, clamping hole; 622, limiting hole; 63, linkage block; 631, linkage strip; 64, stopping groove. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-8 This application is described in further detail.

[0038] Example 1

[0039] This embodiment discloses an isolating circuit breaker. Figure 1 and Figure 2 A disconnecting circuit breaker includes a housing 1, a moving contact 2 is rotatably connected to the housing 1, two stationary contacts 3 and two grounding contacts 31 are fixedly connected to the housing 1, and the two stationary contacts 3 and the two grounding contacts 31 are both located in the rotation path of the moving contact 2. A protective pad 32 is fixedly connected to the stationary contact 3 and the grounding contact 31, and the protective pad 32 is used to abut against the moving contact 2 to reduce the friction between the moving contact 2 and the stationary contact 3 or the friction between the moving contact 2 and the grounding contact 31.

[0040] Reference Figure 2A shield 11 is fixedly connected to the housing 1, and a grounding contact 31 is arranged on the shield 11. The shield 11 extends to the stationary contact 3 along the rotation direction of the moving contact 2, that is, the rotation path of the moving contact 2 is located inside the shield 11. A plurality of isolation plates 12 are integrally formed inside the shield 11, and the plurality of isolation plates 12 are distributed in an array along the rotation direction of the moving contact 2.

[0041] Reference Figure 2 The housing 1 is rotatably connected with a rotating rod 21, and the moving contact 2 is rotatably connected with the rotating rod 21. An umbrella skirt 22 is fixedly connected to the outer surface of the rotating rod 21, and the umbrella skirt 22 is made of silicone. The umbrella skirt 22 can extend the creepage distance of the rotating rod 21.

[0042] Reference Figure 2 and Figure 3 The moving contact 2 includes two swing rods 23, and the stationary contact 3 or the grounding contact 31 can be inserted between the two swing rods 23 to connect or disconnect the circuit. The swing rod 23 is provided with a first bolt 24 and a second bolt 241, and a through hole 231 is provided on the surface of the swing rod 23 for the first bolt 24 or the second bolt 241 to pass through. The end surface of the first bolt 24 away from the head is provided with a receiving groove 242, and the groove wall of the receiving groove 242 has a thread, that is, the second bolt 241 and the groove wall of the receiving groove 242 are threadedly connected.

[0043] Reference Figure 3 The first bolt 24 and the second bolt 241 are both sleeved with a fixing cover 25, and a fixing groove 251 is formed on the fixing cover 25. The first bolt 24 and the second bolt 241 are both sleeved with a fixing spring 252, one end of the fixing spring 252 abuts against the swing rod 23, and the other end of the fixing spring 252 abuts against the bottom wall of the fixing groove 251. The fixing cover 25 protects the fixing spring 252, shields the discharge phenomenon of the tip of the fixing spring 252, and ensures the insulation safety performance of the swing rod 23.

[0044] Reference Figure 3 When the first bolt 24 and the second bolt 241 pass through the through hole 231 and the second bolt 241 is inserted into the receiving groove 242, the fixing spring 252 pushes the swing rod 23 to move toward the other swing rod 23, so that the swing rod 23 can better abut the stationary contact 3 or the grounding contact 31.

[0045] Reference Figure 2The housing 1 is provided with a driving structure 4, which is used to drive the moving contact 2 to rotate. The driving structure 4 includes a driving rod 41, a rocking arm 42 and a connecting rod 43. The driving rod 41 is rotatably connected to the housing 1. A driving hole 421 is provided on the surface of the rocking arm 42. The driving rod 41 is a regular hexagon. The driving rod 41 passes through the driving hole 421 to achieve mutual fixation between the rocking arm 42 and the driving rod 41. One end of the connecting rod 43 is rotatably connected to the rocking arm 42, and the other end of the connecting rod 43 is rotatably connected to the rotating seat 5. The swing rod 23 is detachably connected to a mounting sleeve 6, and the rotating seat 5 is fixedly connected to the mounting sleeve 6.

[0046] Reference Figure 2 When the driving rod 41 rotates, the driving rod 41 rotates the moving contact 2 through the rocker 42 and the connecting rod 43, so that the two ends of the moving contact 2 abut against the static contact 3 and reach the first position; so that both ends of the moving contact 2 do not abut against the static contact 3 or the grounding contact 31 and reach the second position; so that both ends of the moving contact 2 abut against the grounding contact 31 and reach the third position.

[0047] The implementation principle of the embodiment 1 is as follows: the driving rod 41 drives the moving contact 2 to rotate through the rocker 42 and the connecting rod 43 .

[0048] Example 2

[0049] Reference Figure 4 and Figure 5 The difference between this embodiment and the first embodiment is that a plurality of slots 26 are provided on the surface of the swing rod 23, and the plurality of slots 26 are arranged in an array along the length direction of the swing rod 23. A first block 51 is integrally formed on the surface of the rotating seat 5, and second blocks 52 are integrally formed at both ends of the first block 51, and the second block 52 can be inserted into the slot 26. When the first block 51 is inserted between the two swing rods 23, the second block 52 can be inserted into the slot 26, so as to fix the rotating seat 5.

[0050] Reference Figure 5 A push spring 53 is provided on the surface of the rotating seat 5 provided with the first clamping block 51, and a push plate 531 is fixedly connected to the surface of the push spring 53 away from the rotating seat 5. The push spring 53 drives the push plate 531 to move in a direction away from the rotating seat 5. The push plate 531 is inclined between the direction of the push spring 53 and the direction of the end surface of the swing rod 23.

[0051] Reference Figure 5 and Figure 6 The mounting sleeve 6 is provided with a mounting hole 54, and the receiving hole 61 extends along the length direction of the mounting sleeve 6. A receiving plate 62 is slidably connected in the receiving hole 61, and the receiving plate 62 can slide along the height direction of the mounting sleeve 6. A clamping hole 621 for the first clamping block 51 to pass through is provided on the surface of the receiving plate 62, and the clamping hole 621 extends along the length direction of the mounting sleeve 6.

[0052] Reference Figure 7 Two linkage blocks 63 are integrally formed on the surface of the receiving plate 62, and linkage bars 631 are integrally formed on the linkage blocks 63. The linkage bars 631 extend along the length direction of the mounting sleeve 6. A linkage groove 521 is provided on the surface of the second clamping block 52 for the linkage bars 631 to be inserted into.

[0053] Reference Figure 5 and Figure 7 , the first card block 51 is inserted between the two swing rods 23, and the second card block 52 is inserted into the card slot 26. At this time, the push spring 53 allows the push plate 531 to abut against the swing rod 23. Then people first pull the accommodating plate 62 to allow the installation sleeve 6 to be set on the two swing rods 23, and then slide the installation sleeve 6. The accommodating plate 62 moves through the inclined surface of the pushing plate 531, and the pushing spring 53 allows the accommodating plate 62 to abut against the swing rod 23 through the pushing plate 531 until the linkage bar 631 is inserted into the linkage slot 521.

[0054] Reference Figure 7 A through hole 522 connected to the linkage groove 521 is provided on the surface of the second block 52, and a limit bar 523 is slidably connected in the through hole 522, and the limit bar 523 is made of elastic material. A limit hole 622 is provided on the surface of the receiving plate 62 for the limit bar 523 to be inserted. Both ends of the limit bar 523 are arc surfaces, so that the linkage bar 631 can push the limit bar 523 through the arc surface to protrude from the through hole 522, so that the limit bar 523 can be separated from the limit hole 622.

[0055] Reference Figure 7 When the linkage bar 631 is inserted into the linkage groove 521 , the linkage bar 631 pushes the limiting bar 523 to protrude from the through hole 522 and allows the limiting bar 523 to be inserted into the limiting hole 622 , thereby fixing the accommodating plate 62 .

[0056] Reference Figure 8 The rotating seat 5 is provided with a mounting hole 54, and the connecting rod 43 is provided with a mounting rod 541 for inserting into the mounting hole 54, and the mounting rod 541 is threadedly connected to the hole wall of the mounting hole 54. A stop hole 542 is provided on the hole wall of the mounting hole 54, and a stop rod 543 is slidably connected in the stop hole 542, and both ends of the stop rod 543 are arc surfaces. A stop groove 64 for inserting the stop rod 543 is provided on the surface of the accommodating plate 62. When the mounting rod 541 is inserted into the mounting hole 54, the stop rod 543 can protrude from the stop hole 542, allowing the stop rod 543 to be inserted into the stop groove 64, so that the rotating seat 5 can fix the mounting plate.

[0057] The implementation principle of Example 2 is as follows: people first insert the first card block 51 between the two swing rods 23, and let the second card block 52 be inserted into the card slot 26. At this time, the push spring 53 allows the push plate 531 to abut against the swing rod 23. Then people first pull the accommodating plate 62 to allow the installation sleeve 6 to be sleeved on the two swing rods 23, and then slide the installation sleeve 6. The accommodating plate 62 moves along the inclined surface of the push plate 531, and the push spring 53 allows the accommodating plate 62 to abut against the swing rod 23 through the push plate 531 until the linkage bar 631 is inserted into the linkage slot 521, and the linkage bar pushes the limit bar 523 to be inserted into the limit hole 622. Finally, the installation rod 541 is inserted into the installation hole 54, and the installation rod 541 pushes the stop rod 543 to insert into the stop slot 64.

[0058] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. An isolating circuit breaker, comprising a housing (1), a moving contact (2) being rotatably connected to the housing (1), a stationary contact (3) and a grounding contact (31) being provided on the housing (1), the moving contact (2) being capable of abutting against the stationary contact (3) or the grounding contact (31), characterized in that: The moving contact (2) is provided with a driving structure (4), the driving structure (4) comprising a driving rod (41), a rocking arm (42), and a connecting rod (43), the driving rod (41) being rotatably connected to the housing (1), one end of the rocking arm (42) being fixedly connected to the driving rod (41), the other end of the rocking arm (42) being rotatably connected to the connecting rod (43), and the connecting rod (43) being rotatably connected to the moving contact (2); The moving contact (2) comprises two swing rods (23), between which the stationary contact (3) or the grounding contact (31) is inserted, and the swing rod (23) is threadedly connected with a first bolt (24) and a second bolt (241), and the first bolt (24) is provided with a receiving groove (242) for the second bolt (241) to be threadedly connected, and when the second bolt (241) is inserted into the receiving groove (242), the first bolt (24) and the second bolt (241) are fixed to each other; The connecting rod (43) is provided with a rotating seat (5), the moving contact (2) is provided with a slot (26), the rotating seat (5) is provided with a first block (51) for inserting between the two swing rods (23), the block is provided with a second block (52) for inserting into the slot (26), the moving contact (2) is slidably connected with a mounting sleeve (6), and the mounting sleeve (6) can block the path of the second block (52) from leaving the slot (26); The rotating seat (5) is slidably connected to a limit strip (523), and the mounting sleeve (6) is provided with a limit hole (622) for the limit strip (523) to be inserted into. When the limit strip (523) is inserted into the limit hole (622), the mounting sleeve (6) is fixed on the rotating seat (5); The mounting sleeve (6) is provided with a linkage bar (631), the rotating seat (5) is provided with a linkage groove (521) for the linkage bar (631) to be inserted, the rotating seat (5) is provided with a through hole (522) connected to the linkage groove (521), the limiting bar (523) is slidably connected in the through hole (522), and when the linkage bar (631) is inserted into the linkage groove (521), the linkage bar (631) pushes the limiting bar (523) to be inserted into the limiting hole (622); The mounting sleeve (6) is provided with a receiving hole (61), a receiving plate (62) is slidably connected in the receiving hole (61), the linkage bar (631) is integrally formed on the receiving plate (62), and a push spring (53) is provided on the rotating seat (5), and the push spring (53) drives the receiving plate (62) to abut against the moving contact (2); The rotating seat (5) is provided with a mounting hole (54), the connecting rod (43) is provided with a mounting rod (541) for inserting into the mounting hole (54), a stop rod (543) is slidably connected in the mounting hole (54), and the mounting sleeve (6) is provided with a stop groove (64) for inserting the stop rod (543), when the mounting rod (541) is inserted into the mounting hole (54), the mounting rod (541) pushes the stop rod (543) to insert into the stop groove (64), and the mounting sleeve (6) and the rotating seat (5) are fixed to each other.

2. An isolating circuit breaker according to claim 1, characterized in that: The housing (1) is rotatably connected to a rotating rod (21), the moving contact (2) is rotatably connected to the rotating rod (21), and the rotating rod (21) is provided with an umbrella skirt (22).

3. The isolating circuit breaker according to claim 1, characterized in that: A fixing spring (252) is sleeved on the first bolt (24), and the fixing spring (252) is located between the swing rod (23) and the head of the first bolt (24). When the fixing spring (252) is installed on the swing rod (23), the fixing spring (252) pushes the swing rod (23) to move in the direction of the other swing rod (23).

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