Interlocking structure of isolating switch operating mechanism and circuit breaker operating mechanism and circuit breaker

Abstract

The utility model discloses an interlocking structure of an isolating switch operating mechanism and a circuit breaker operating mechanism and a circuit breaker, and relates to the field of electrical switches, the interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism comprises a driving pull rod, an isolating rotating shaft and a circuit breaker closing trigger assembly; the isolation rotating shaft is provided with an isolation interlocking crank arm and a closing interlocking crank arm, the driving pull rod is provided with an isolation interlocking pin, and when the driving pull rod is in a closing state, the isolation interlocking pin can prevent the isolation interlocking crank arm from rotating; the circuit breaker closing trigger assembly comprises a closing half shaft and a closing pinch plate, the closing half shaft is perpendicular to the isolation rotating shaft, the closing pinch plate is vertically and fixedly connected with the closing half shaft, the closing pinch plate is used for driving the closing half shaft to trigger a closing action, and when the isolation rotating shaft is in a state between closing and opening, the closing interlocking crank arm can prevent the closing pinch plate from rotating. The problem that the disconnecting switch is burnt due to the improper operation sequence of the circuit breaker and the disconnecting switch can be reduced.

Description

Technical Field

[0001] The present application relates to the field of electrical switches, and in particular to an interlocking structure of an isolating switch operating mechanism and a circuit breaker operating mechanism, and a circuit breaker. Background Art

[0002] Circuit breakers and disconnectors often work together in a circuit. Compared to circuit breakers, disconnectors have a simpler structure, so some vacuum circuit breakers have built-in disconnectors for easy operation. Since disconnectors do not have an arc extinguishing function, circuit breakers and disconnectors need to follow a certain operating sequence.

[0003] In actual circuit switching operations, due to operating errors, the circuit breaker and disconnector may not be operated in the correct order, causing arcs to form during the closing and opening of the disconnector, resulting in burning and damage to the disconnector. Utility Model Content

[0004] In order to reduce the problem of burning and damage of the isolating switch caused by improper operation sequence of the circuit breaker and the isolating switch, the present application provides an interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism and a circuit breaker.

[0005] The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism and the circuit breaker provided in the present application adopt the following technical solutions:

[0006] The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism comprises a driving rod, an isolating shaft and a circuit breaker closing trigger assembly; the driving rod is arranged parallel to and side by side with the isolating shaft, the driving rod is used to execute the closing and opening actions of the circuit breaker, and the isolating shaft is used to execute the closing and opening actions of the isolating switch; the isolating shaft is provided with an isolating interlocking crank arm and a closing interlocking crank arm, the driving rod is provided with an isolating interlocking pin, and when the driving rod is in the closed state, the isolating interlocking pin can hinder the rotation of the isolating interlocking crank arm; the circuit breaker closing trigger assembly comprises a closing half-shaft and a closing buckle plate, the closing half-shaft is perpendicular to the isolating shaft, the closing buckle plate is vertically fixedly connected to the closing half-shaft, the closing buckle plate is used to drive the closing half-shaft to trigger the closing action, and when the isolating shaft is between the closed and open states, the closing interlocking crank arm can hinder the rotation of the closing buckle plate.

[0007] By adopting the above technical solution, when the interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism is used, the isolating switch can be switched between closing and opening by rotating the isolating shaft, and the circuit breaker can be switched between closing and opening by reciprocating the driving pull rod. When the isolating switch and the circuit breaker are both in the closed state, the isolating interlocking pin can prevent the rotation of the isolating interlocking crank arm to prevent the isolating shaft from switching to the open state, thereby reducing the opening action of the isolating switch when the circuit breaker is closed, thereby reducing the arcing and burning damage caused by the opening of the isolating switch; when the isolating shaft is between the closed and open states of the isolating switch, the closing interlocking crank arm on the isolating shaft can prevent the closing buckle plate from rotating to trigger the closing action, thereby reducing the arcing damage caused by the close distance between the contacts of the isolating switch, so that the isolating switch is reliably protected.

[0008] Optionally, the isolation shaft is provided with two screws, one of which is used to fix the isolation interlocking crank arm, and the other is used to fix the closing interlocking crank arm.

[0009] By adopting the above technical solution, the isolation interlocking crank arm and the closing interlocking crank arm are fixed on the isolation rotating shaft by screws, which is convenient for disassembly and assembly.

[0010] Optionally, the isolation interlocking crank arm includes a first annular portion and a first crank arm portion, the first crank arm portion is protrudingly arranged on the outer circumferential surface of the first annular portion, and the first annular portion is sleeved and fixed on the isolation rotating shaft; the screw corresponding to the isolation interlocking crank arm passes through the first crank arm portion.

[0011] By adopting the above technical solution, the isolation shaft is usually manually operated, and a large impact force will be generated when the isolation interlocking crank arm and the isolation interlocking pin contact each other due to interference; by passing the screw through the first crank arm portion of the isolation interlocking crank arm, the effective matching size between the screw and the isolation interlocking crank arm can be increased, so that the connection between the isolation interlocking crank arm and the isolation shaft is more reliable, and the impact load can be better transmitted between the isolation interlocking crank arm and the isolation interlocking shaft.

[0012] Optionally, the nail heads of the two screws face the same direction.

[0013] By adopting the above technical solution, the nail heads of the two screws face the same direction, which facilitates the installation of the two screws.

[0014] Optionally, the screw includes an external thread section and an optical axis section, the diameter of the optical axis section is the same as the outer diameter of the external thread section; the isolation shaft is provided with a threaded hole adapted to the screw, the threaded hole includes an internal thread section and a light hole section, the internal thread section is adapted to the external thread section, and the light hole section is adapted to the optical axis section; the isolation interlocking crank arm and the closing interlocking crank arm are both provided with a through hole adapted to the screw.

[0015] By adopting the above technical solution, when the screw is tightened, the screw cooperates with the optical hole section of the threaded hole and the through hole through the optical axis section, which makes it easier to ensure the matching accuracy between the screw and the isolation shaft and the isolation interlocking crank arm respectively, so that the screw can more reliably transfer the load between the isolation shaft and the isolation interlocking crank arm; and the part where the screw transfers the load is the optical axis section, which is not prone to stress concentration fracture.

[0016] Optionally, the end of the screw is a tip, and the surface of the isolation shaft is provided with a guide tangent extending in the axial direction, and the guide tangent can guide the tip of the screw.

[0017] By adopting the above technical solution, when installing the isolation interlocking crank arm and the closing interlocking crank arm, two screws are pre-inserted on the isolation interlocking crank arm and the closing interlocking crank arm respectively, so that the guide tangent of the isolation shaft surface forms a guiding effect on the tip of the screw, thereby guiding the installation process of the isolation interlocking crank arm and the closing interlocking crank arm. When the isolation interlocking crank arm and the closing interlocking crank arm are closely matched with the isolation shaft, guiding the isolation interlocking crank arm and the closing interlocking crank arm can make the installation of the isolation interlocking crank arm and the closing interlocking crank arm more convenient.

[0018] Optionally, there is a transition fit between the isolation rotating shaft and the isolation interlocking crank arm.

[0019] By adopting the above technical solution, the transition fit between the isolation shaft and the isolation interlocking crank arm can reduce the shaking amplitude when the isolation interlocking crank arm and the isolation shaft interfere or collide.

[0020] A circuit breaker comprises an interlocking structure of an isolating switch operating mechanism and a circuit breaker operating mechanism as described in any one of the above.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. When the isolating switch and the circuit breaker are both in the closed state, the isolating interlock pin can prevent the isolating interlock arm from rotating, so as to prevent the isolating shaft from switching to the open state, thereby reducing the arcing and burning damage caused by the isolating switch opening; when the isolating shaft is between the closed and open states of the isolating switch, the closing interlock arm on the isolating shaft can prevent the closing plate from rotating to trigger the closing action, thereby reducing the arcing and damage caused by the close distance between the contacts of the isolating switch.

[0023] 2. By passing the screw through the first crank arm portion of the isolation interlocking crank arm, the effective matching size between the screw and the isolation interlocking crank arm can be increased, making the connection between the isolation interlocking crank arm and the isolation rotating shaft more reliable, and enabling the impact load to be better transmitted between the isolation interlocking crank arm and the isolation interlocking rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism of Example 1.

[0025] Figure 2 It is a schematic structural diagram of the isolation shaft of Example 1.

[0026] Figure 3 It is a schematic diagram used to illustrate the positional relationship between the isolation interlocking arm and the isolation interlocking pin in Example 1.

[0027] Figure 4 It is a schematic diagram used to reflect the positional relationship between the closing interlocking arm and the circuit breaker closing trigger assembly in Example 1.

[0028] Figure 5 It is a schematic structural diagram of the isolation shaft of Example 2.

[0029] Figure 6 It is a schematic diagram used to illustrate the connection relationship between the closing interlocking crank arm and the isolating shaft in Example 2.

[0030] Description of reference numerals:

[0031] 1. Driving rod; 11. Driving swing arm; 12. Threaded hole; 121. Internal thread section; 122. Light hole section; 13. Guide tangent; 2. Isolating shaft; 3. Circuit breaker closing trigger assembly; 31. Closing buckle plate; 32. Closing half shaft; 33. Electric trigger device; 4. Isolating interlocking crank arm; 41. First annular portion; 42. First crank arm portion; 5. Closing interlocking crank arm; 51. Second annular portion; 52. Second crank arm portion; 6. Isolating interlocking pin; 7. Screw; 71. External thread section; 72. Light axis section; 8. Through hole. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-6 This application is described in further detail.

[0033] Example 1

[0034] The embodiment of the present application discloses an interlocking structure of an isolating switch operating mechanism and a circuit breaker operating mechanism and a circuit breaker. Figure 1 and Figure 2 The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism includes a driving rod 1, an isolating shaft 2 and a circuit breaker closing trigger assembly 3; the driving rod 1 is arranged parallel to the isolating shaft 2, and the driving rod 1 is provided with a driving swing arm 11, which can drive the driving rod 1 to move back and forth, and the driving rod 1 is used to execute the closing and opening actions of the circuit breaker; the isolating shaft 2 is used to execute the closing and opening actions of the isolating switch.

[0035] Reference Figure 3 and Figure 4 The isolation shaft 2 is provided with an isolation interlocking crank arm 4 and a closing interlocking crank arm 5. The isolation interlocking crank arm 4 includes a first annular portion 41 and a first crank arm portion 42. The first crank arm portion 42 is protrudingly arranged on the outer circumference of the first annular portion 41, and the first annular portion 41 is sleeved and fixed on the isolation shaft 2. The closing interlocking crank arm 5 includes a second annular portion 51 and a second crank arm portion 52. The second crank arm portion 52 is protrudingly arranged on the outer circumference of the second annular portion 51, and the second annular portion 51 is sleeved and fixed on the isolation shaft 2.

[0036] The isolation shaft 2 is provided with two screws 7, which are specifically set screws 7, one of which is used to fix the isolation interlocking crank arm 4, and the other is used to fix the closing interlocking crank arm 5. The nail heads of the two screws 7 face the same direction, and the screw 7 corresponding to the isolation interlocking crank arm 4 passes through the first crank arm part 42.

[0037] Reference Figure 1 and Figure 3 The driving swing arm 11 is fixedly provided with an isolation interlock pin 6, and the isolation interlock pin is perpendicular to the driving rod 1. When the driving rod 1 is switched between the closing and opening states, the isolation interlock pin can reciprocate with the driving rod 1, and the moving path of the isolation interlock pin 6 interferes with the rotation path of the first crank arm portion 42; when the driving rod 1 is in the closing state, the isolation interlock pin 6 can hinder the rotation of the isolation interlock crank arm 4.

[0038] Reference Figure 1 and Figure 4 The circuit breaker closing trigger assembly 3 includes a closing half-shaft 32, a closing pinch plate 31 and an electric trigger device 33. The closing half-shaft 32 is perpendicular to the isolation shaft 2, and the closing pinch plate 31 is vertically fixedly connected to the closing half-shaft 32. When the circuit breaker closing trigger assembly 3 is working, the electric trigger device 33 moves the closing pinch plate 31, so that the closing pinch plate 31 drives the closing half-shaft 32 to trigger the closing action; the rotation path of the closing pinch plate 31 interferes with the rotation path of the second crank arm 52. When the isolation shaft 2 is between the closing and opening states, the closing interlock crank arm 5 can prevent the closing pinch plate 31 from rotating.

[0039] The circuit breaker closing trigger component 3 is used to trigger the closing action of the circuit breaker, while the circuit breaker opening action requires the circuit breaker opening trigger component to trigger.

[0040] When the interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism is used, the isolating switch can be switched between on and off by rotating the isolating shaft 2, and the circuit breaker can be switched between on and off by reciprocating the driving rod 1. When the isolating switch and the circuit breaker are both in the closed state, the isolating interlocking pin 6 can prevent the isolating interlocking crank arm 4 from rotating to prevent the isolating shaft 2 from switching to the open state, thereby reducing the isolating switch from opening when the circuit breaker is closed, thereby reducing the arcing and burning caused by the isolating switch opening; when the isolating shaft 2 is between the isolating switch closing and opening states, the closing interlocking crank arm 5 on the isolating shaft 2 can prevent the closing plate 31 from rotating to trigger the closing action, thereby reducing the arcing and burning caused by the isolating switch contacts being too close in space, so that the isolating switch is reliably protected.

[0041] This embodiment also discloses a circuit breaker, including the interlocking structure of the above-mentioned isolating switch operating mechanism and the circuit breaker operating mechanism.

[0042] Example 2

[0043] Reference Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that, in this embodiment, the screw 7 includes an external thread section 71 and an optical axis section 72, and the diameter of the optical axis section 72 is the same as the outer diameter of the external thread section 71; the isolation shaft 2 is provided with a threaded hole 12 adapted to the screw 7, and the threaded hole 12 includes an internal thread section 121 and a light hole section 122, the internal thread section 121 is adapted to the external thread section 71, and the light hole section 122 is adapted to the light axis section 72; the isolation interlocking crank arm 4 and the closing interlocking crank arm 5 are both provided with a through hole 8 adapted to the screw 7, the optical axis portion of the screw 7 is transitionally matched with the light hole section 122, and a transitional fit or an interference fit is adopted between the optical axis section 72 of the screw 7 and the through hole 8.

[0044] The isolating rotating shaft 2 is transitionally matched with the isolating interlocking crank arm 4 and the closing interlocking crank arm 5 respectively, so that the installation states of the isolating interlocking crank arm 4 and the closing interlocking crank arm 5 remain stable.

[0045] The end of the screw 7 is a pointed tip, and the surface of the isolation shaft 2 is provided with a guide tangent 13 extending along the axial direction. The guide tangent 13 can guide the tip of the screw 7. When the isolation interlocking crank arm 4 and the closing interlocking crank arm 5 are tightly matched with the isolation shaft 2 respectively, the through hole 8 of the isolation interlocking crank arm 4 and the through hole 8 of the closing interlocking crank arm 5 can be more easily aligned with the threaded hole 12.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism is characterized by: The invention comprises a driving rod (1), an isolating shaft (2) and a circuit breaker closing trigger assembly (3); the driving rod (1) and the isolating shaft (2) are arranged in parallel and side by side, the driving rod (1) is used to execute the closing and opening actions of the circuit breaker, and the isolating shaft (2) is used to execute the closing and opening actions of the isolating switch; the isolating shaft (2) is provided with an isolating interlocking crank arm (4) and a closing interlocking crank arm (5), the driving rod (1) is provided with an isolating interlocking pin (6), and when the driving rod (1) is in the closed state, the isolating interlocking pin (6) can prevent the rotation of the isolating interlocking crank arm (4); The circuit breaker closing trigger assembly (3) comprises a closing half-shaft (32) and a closing pinch plate (31); the closing half-shaft (32) is perpendicular to the isolation shaft (2); the closing pinch plate (31) is vertically fixedly connected to the closing half-shaft (32); the closing pinch plate (31) is used to drive the closing half-shaft (32) to trigger a closing action; when the isolation shaft (2) is between a closing state and an opening state, the closing interlocking crank arm (5) can prevent the closing pinch plate (31) from rotating.

2. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism according to claim 1 is characterized in that: The isolation rotating shaft (2) is provided with two screws (7), one of which is used to fix the isolation interlocking crank arm (4), and the other is used to fix the closing interlocking crank arm (5).

3. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism according to claim 2 is characterized in that: The isolation interlocking crank arm (4) comprises a first annular portion (41) and a first crank arm portion (42); the first crank arm portion (42) is protrudingly arranged on the outer circumferential surface of the annular portion; the first annular portion (41) is sleeved and fixed on the isolation rotating shaft (2); and a screw (7) corresponding to the isolation interlocking crank arm (4) passes through the first crank arm portion (42).

4. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism according to claim 2 is characterized in that: The nail heads of the two screws (7) face the same direction.

5. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism according to claim 4 is characterized in that: The screw (7) comprises an external thread section (71) and an optical axis section (72), the diameter of the optical axis section (72) being the same as the outer diameter of the external thread section (71); the isolation shaft (2) is provided with a threaded hole (12) adapted to the screw (7), the threaded hole (12) comprises an internal thread section (121) and an optical hole section (122), the internal thread section (121) being adapted to the external thread section (71), and the optical hole section (122) being adapted to the optical axis section (72); the isolation interlocking crank arm (4) and the closing interlocking crank arm (5) are both provided with a through hole (8) adapted to the screw (7).

6. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism according to claim 5 is characterized in that: The end of the screw (7) is a tip, and the surface of the isolation shaft (2) is provided with a guide tangent (13) extending in the axial direction, and the guide tangent (13) can guide the tip of the screw (7).

7. The interlocking structure of the isolating switch operating mechanism and the circuit breaker operating mechanism according to claim 1, characterized in that: The isolation rotating shaft (2) and the isolation interlocking crank arm (4) are transitionally matched.

8. A circuit breaker, characterized in that: The invention comprises an interlocking structure of an isolating switch operating mechanism and a circuit breaker operating mechanism as described in any one of claims 1 to 7.

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