Operating mechanism of built-in isolating switch of outdoor pillar type circuit breaker
By designing an operating mechanism with built-in isolation switch in an outdoor pillar circuit breaker, the limit plate interferes with the movement path of the switch shaft, the problem of the isolation switch being prone to arcing when the circuit breaker is closed, and the operation safety is improved.
Patent Information
- Application Number
- CN202420615360.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In existing outdoor pillar circuit breakers, the isolation switch does not have the arc extinguishing function, which causes the isolation switch to be opened when the circuit breaker is closed before the circuit breaker is closed, and the isolation switch can easily be pulled out when the closing action is performed directly, which poses a safety hazard.
An operating mechanism with an outdoor pillar-type circuit breaker is designed to have an operation mechanism with an isolation switch built-in. Through the cooperation of the switch shaft and the isolation rotation shaft, the limit plate interferes with the telescopic movement path of the switch shaft to prevent the circuit breaker from closing when the isolation switch is not closed in place.
It effectively reduces the arcing phenomenon of the isolating switch when the circuit breaker is closed, and improves the safety of circuit breaker operation.
Smart Images
Figure CN222785179U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of circuit breakers, and in particular to an operating mechanism of a built-in isolating switch of an outdoor pillar-type circuit breaker. Background Art
[0002] The pillar-type circuit breaker is a common outdoor circuit breaker. The circuit breaker usually cooperates with the disconnector to control the circuit. The existing disconnector is set separately from the circuit breaker, and the opening and closing of the disconnector is carried out separately from the opening and closing of the circuit breaker. Since the disconnector does not have an arc extinguishing function, it is necessary to control the closing and opening sequence between the circuit breaker and the disconnector. The closing of the disconnector needs to be carried out before the closing of the circuit breaker, and the opening of the disconnector needs to be carried out after the opening of the circuit breaker.
[0003] However, if due to operating errors, before the circuit breaker is closed, the isolating switch has not been fully closed, that is, the isolating switch is in a half-open and half-closed state, if the circuit breaker switch is closed directly, it is easy to cause the isolating switch to arc, which is dangerous. Utility Model Content
[0004] In order to reduce the arcing of the isolating switch when the circuit breaker is closed, the present application provides an operating mechanism for a built-in isolating switch in an outdoor pillar-type circuit breaker.
[0005] The operating mechanism of an outdoor pillar-type circuit breaker with a built-in isolating switch provided in the present application adopts the following technical solution:
[0006] An operating mechanism for a built-in disconnector of an outdoor pillar-type circuit breaker comprises a mechanism connecting plate, a switch shaft and an isolating rotating shaft, wherein the switch shaft can be extended and retracted to drive the circuit breaker to trigger a closing and opening action, the isolating rotating shaft is arranged side by side with the switch shaft, the isolating rotating shaft is rotatably connected to the mechanism connecting plate, and the isolating rotating shaft is provided with a limit plate; when the isolating rotating shaft is in a state between the closing and opening states corresponding to the built-in disconnector, the limit plate interferes with a telescopic moving path of the switch shaft; when the isolating rotating shaft corresponds to the closing or opening state of the built-in disconnector, the limit plate is staggered with the telescopic moving path of the switch shaft.
[0007] By adopting the above technical solution, before using the switch shaft to trigger the closing of the circuit breaker, it is necessary to rotate the isolating shaft in advance to close the built-in isolating switch. When the built-in isolating switch fails to be closed, the limit plate interferes with the telescopic movement path of the switch shaft, so that the telescopic movement of the switch shaft is hindered to prevent the circuit breaker from closing when the built-in isolating switch is not closed. This reduces the arcing phenomenon of the built-in isolating switch, which is beneficial to improving the safety of circuit breaker operation.
[0008] Optionally, the mechanism connecting plate is provided with a socket for inserting the limiting plate.
[0009] When the isolating shaft is in the state between the closing and opening of the corresponding built-in isolating switch, the telescopic switch shaft will hit the limit plate; by adopting the above technical solution, the limit plate can be plugged into the socket of the mechanism connecting plate, so that the limit plate is positioned by the socket, reducing the deformation of the limit plate under the impact force of the switch shaft.
[0010] Optionally, the limit plate is provided with an avoidance notch for avoiding the switch shaft, and the avoidance notch is located on a side of the limit plate away from the mechanism connecting plate.
[0011] By adopting the above technical solution, when the limit plate is plugged into the socket, the avoidance gap can avoid the switch shaft. By setting the avoidance gap, the arrangement between the limit plate and the switch shaft can be more compact, and the limit plate can have a sufficient size.
[0012] Optionally, the limiting plate is provided with a reinforcing folding plate, and the reinforcing folding plate is located on a side of the limiting plate away from the avoidance gap.
[0013] By adopting the above technical solution, the reinforcing folding plate can strengthen the structure of the limit plate to further reduce the deformation of the limit plate under the impact of the switch shaft.
[0014] Optionally, it also includes an elastic retaining assembly, which includes a telescopic rod, a hinged plate and a retaining compression spring, the hinged plate is fixed to the isolation shaft, one end of the telescopic rod is hinged to the hinged plate, and the other end of the telescopic rod is used to be hinged to the external mounting structure of the circuit breaker; the retaining compression spring is sleeved on the telescopic rod, and limiting parts are respectively provided at both ends of the telescopic rod, and the retaining compression spring is located between the two limiting parts; the shortest length state of the telescopic rod corresponds to the middle section of the rotation stroke of the telescopic rod.
[0015] By adopting the above technical solution, when the isolation shaft rotates, the isolation shaft drives the telescopic rod to rotate, and the telescopic rod simultaneously undergoes telescopic changes during its rotation. When the telescopic rod rotates to the middle of its stroke, the telescopic rod contracts to the shortest state, thereby keeping the compression spring in a state of maximum compression. Therefore, the compression spring can prevent the telescopic rod from rotating to the middle position of the stroke, making it easier for the isolation shaft to remain in the state corresponding to the closing or opening of the built-in isolating switch.
[0016] Optionally, two elastic force retaining components are provided, and the two elastic force retaining components are respectively located at two ends of the isolation shaft.
[0017] By adopting the above technical solution, the two elastic force retaining components respectively maintain the travel at both ends of the isolation shaft, which is beneficial to keep the force of the isolation shaft balanced during the rotation process.
[0018] Optionally, the hinge plate of one of the elastic force retaining components is integrally connected to the limiting plate.
[0019] By adopting the above technical solution, the hinge plate and the limit plate of an elastic force holding component are connected as one, which is conducive to simplifying the structure of the operating mechanism.
[0020] Optionally, the switch shaft is hingedly provided with a plurality of cranks parallel to each other, and the cranks are hingedly connected to the mechanism connecting plate.
[0021] By adopting the above technical solution, the switch shaft and multiple cranks together form a crank mechanism. When the crank swings back and forth, the switch shaft can undergo reciprocating translational motion, so that the switch shaft can be used to trigger the closing and opening actions of the circuit breaker.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. When the built-in disconnector fails to close in place, the limit plate interferes with the telescopic movement path of the switch shaft, which hinders the telescopic movement of the switch shaft, preventing the circuit breaker from closing when the built-in disconnector is not closed in place, thereby reducing the arcing phenomenon of the built-in disconnector, which is beneficial to improving the safety of circuit breaker operation.
[0024] 2. By providing an elastic retaining component, the isolating shaft can be more easily maintained in the closed or open state of the corresponding built-in isolating switch. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the operating mechanism in the present embodiment in the circuit breaker open state and the built-in isolating switch open state.
[0026] Figure 2 It is a schematic diagram of the operating mechanism in this embodiment in the state where the circuit breaker is opened and the built-in isolating switch is closed.
[0027] Figure 3 It is a schematic diagram of the present embodiment for reflecting the connection relationship between the compression spring and the telescopic rod.
[0028] Description of reference numerals:
[0029] 1. Mechanism connecting plate; 11. Socket; 2. Switch shaft; 3. Isolation shaft; 4. Swing arm; 5. Limiting plate; 51. Reinforced folding plate; 52. Avoidance gap; 6. Crank; 7. Elastic force holding component; 71. Telescopic rod; 711. Limiting part; 72. Hinge plate; 73. Holding compression spring. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-3 This application is described in further detail.
[0031] The embodiment of the present application discloses an operating mechanism for a built-in isolating switch of an outdoor pillar-type circuit breaker. Figure 1 and Figure 2 The operating mechanism of the built-in disconnector of the outdoor pillar-type circuit breaker includes a mechanism connecting plate 1, a switch shaft 2 and an isolating shaft 3. The isolating shaft 3 is vertically fixed with three swing arms 4. When the isolating shaft 3 reciprocates, the three swing arms 4 can be used to close and open the built-in disconnector. The switch shaft 2 can be extended and retracted to drive the circuit breaker to trigger the closing and opening actions. The isolating shaft 3 is arranged parallel to the switch shaft 2, and the isolating shaft 3 is rotatably connected to the mechanism connecting plate 1. The isolating shaft 3 is vertically fixed with a limit plate 5.
[0032] When the isolating shaft 3 is in a state between the closing and opening states corresponding to the built-in isolating switch, the limit plate 5 interferes with the telescopic movement path of the switch shaft 2; when the isolating shaft 3 corresponds to the closing or opening state of the built-in isolating switch, the limit plate 5 is staggered with the telescopic movement path of the switch shaft 2.
[0033] When the built-in disconnector is not closed or opened, the limit plate 5 can hinder the telescopic movement of the switch shaft 2 to prevent the circuit breaker from closing when the built-in disconnector is not closed, thereby reducing the arcing phenomenon of the built-in disconnector.
[0034] Reference Figure 1 The switch shaft 2 is hingedly provided with three parallel cranks 6, and the cranks 6 are hingedly connected to the mechanism connecting plate 1. When the cranks 6 swing back and forth, the switch shaft 2 can move back and forth, so that the switch shaft 2 can extend and retract to drive the circuit breaker to trigger the closing and opening actions.
[0035] Reference Figure 1 and Figure 2 The mechanism connecting plate 1 is provided with a socket 11 for inserting the limit plate 5. When the limit plate 5 is inserted into the socket 11, the isolation shaft 3 rotates to the state corresponding to the closed state of the built-in isolation switch. When the isolation shaft 3 fails to rotate to the right position and is impacted by the telescopic switch shaft 2, the socket 11 can prevent the limit plate 5 from being deformed. The limit plate 5 is provided with a reinforcing folding plate 51, which is located on the side of the limit plate 5 away from the avoidance notch 52, and the reinforcing folding plate 51 can further strengthen the structure of the limit plate 5.
[0036] The limit plate 5 is provided with an avoidance notch 52 for avoiding the switch shaft 2. The avoidance notch 52 is located on the side of the limit plate 5 away from the mechanism connecting plate 1. When the isolating shaft 3 rotates to the state corresponding to the closing of the built-in isolating switch, the avoidance notch 52 can avoid the switch shaft 2.
[0037] Reference Figure 1 and Figure 3The isolation shaft 3 is provided with two elastic retaining assemblies, which are respectively located at the two ends of the isolation shaft 3. The elastic retaining assemblies include a telescopic rod 71, a hinged plate 72 and a retaining compression spring 73. The hinged plate 72 is fixed to the isolation shaft 3, and the hinged plate 72 of one of the elastic retaining assemblies is connected to the limit plate 5 as a whole; one end of the telescopic rod 71 is hinged to the hinged plate 72, and the other end of the telescopic rod 71 is used to be hinged to the external mounting structure of the circuit breaker. The external mounting structure of the circuit breaker refers to the housing of the circuit breaker or a component that remains relatively fixed to the housing.
[0038] The retaining compression spring 73 is sleeved on the telescopic rod 71. The two ends of the telescopic rod 71 are respectively provided with limiting parts 711. The limiting parts 711 are flange structures. The retaining compression spring 73 is located between the two limiting parts 711; the shortest length state of the telescopic rod 71 corresponds to the middle section of the rotation stroke of the telescopic rod 71.
[0039] Since the hinged plate 72 and the telescopic rod 71 have three hinge points in total, the hinged plate 72 can rotate only when the telescopic rod 71 is able to be extended and retracted, thereby rotating the isolation shaft 3 .
[0040] When the isolation shaft 3 rotates, the telescopic rod 71 simultaneously expands and contracts. When the telescopic rod 71 rotates to the middle of its stroke, the telescopic rod 71 contracts to the shortest state, so that the compression spring 73 is kept in a state of maximum compression. Therefore, the compression spring can prevent the telescopic rod 71 from rotating to the middle position of the stroke, making it easier for the isolation shaft 3 to remain in the state corresponding to the closed or open state of the built-in isolation switch.
[0041] The implementation principle of the operating mechanism of the built-in disconnector of an outdoor pillar-type circuit breaker in the embodiment of the present application is as follows: before using the switch shaft 2 to trigger the closing of the circuit breaker, it is necessary to rotate the isolating shaft 3 in advance to close the built-in disconnector. When the built-in disconnector fails to close in place, the limit plate 5 interferes with the telescopic movement path of the switch shaft 2, so that the telescopic movement of the switch shaft 2 is hindered to prevent the circuit breaker from closing when the built-in disconnector is not closed in place, thereby reducing the arcing phenomenon of the built-in disconnector, which is beneficial to improving the safety of circuit breaker operation.
[0042] 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. An operating mechanism for a built-in isolating switch of an outdoor pillar-type circuit breaker, characterized in that: The invention comprises a mechanism connecting plate (1), a switch shaft (2) and an isolating rotating shaft (3); the switch shaft (2) can be telescopically driven to drive a circuit breaker to trigger a closing and opening action; the isolating rotating shaft (3) and the switch shaft (2) are arranged side by side; the isolating rotating shaft (3) is rotatably connected to the mechanism connecting plate (1); and the isolating rotating shaft (3) is provided with a limit plate (5); when the isolating rotating shaft (3) is in a state between the closing and opening states corresponding to the built-in isolating switch, the limit plate (5) interferes with the telescopic movement path of the switch shaft (2); when the isolating rotating shaft (3) is in a state corresponding to the closing or opening state of the built-in isolating switch, the limit plate (5) and the telescopic movement path of the switch shaft (2) are offset.
2. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 1, characterized in that: The mechanism connection plate (1) is provided with a socket (11) for inserting the limit plate (5).
3. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 1, characterized in that: The limit plate (5) is provided with an avoidance notch (52) for avoiding the switch shaft (2), and the avoidance notch (52) is located on a side of the limit plate (5) away from the mechanism connecting plate (1).
4. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 3, characterized in that: The limiting plate (5) is provided with a reinforcing folding plate (51), and the reinforcing folding plate (51) is located on a side of the limiting plate (5) away from the avoidance notch (52).
5. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 1, characterized in that: The invention also comprises an elastic force retaining assembly (7), the elastic force retaining assembly (7) comprising a telescopic rod (71), a hinged plate (72) and a retaining compression spring (73), the hinged plate (72) being fixed to the isolation rotating shaft (3), one end of the telescopic rod (71) being hinged to the hinged plate (72), and the other end of the telescopic rod (71) being used for hinged connection to the external mounting structure of the circuit breaker; the retaining compression spring (73) being sleeved on the telescopic rod (71), and limiting portions (711) are respectively provided at both ends of the telescopic rod (71), and the retaining compression spring (73) is located between the two limiting portions (711); the shortest length state of the telescopic rod (71) corresponds to the middle section of the rotation stroke of the telescopic rod (71).
6. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 5, characterized in that: Two elastic force retaining components (7) are provided, and the two elastic force retaining components (7) are respectively located at two ends of the isolation rotating shaft (3).
7. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 6, characterized in that: The hinge plate (72) of one of the elastic force retaining assemblies (7) is integrally connected to the limiting plate (5).
8. The operating mechanism of the built-in isolating switch of an outdoor pillar-type circuit breaker according to claim 1, characterized in that: The switch shaft (2) is hingedly provided with a plurality of cranks (6) parallel to each other, and the cranks (6) are hingedly connected to the mechanism connecting plate (1).