CN113078009A - Cut off interlocking structure of circuit breaker looped netowrk cabinet under upper isolation - Google Patents
Cut off interlocking structure of circuit breaker looped netowrk cabinet under upper isolation Download PDFInfo
- Publication number
- CN113078009A CN113078009A CN202110245622.0A CN202110245622A CN113078009A CN 113078009 A CN113078009 A CN 113078009A CN 202110245622 A CN202110245622 A CN 202110245622A CN 113078009 A CN113078009 A CN 113078009A
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- China
- Prior art keywords
- interlocking
- interlocking plate
- plate
- cam
- circuit breaker
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/16—Earthing arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a partition interlocking structure of an upper isolation lower circuit breaker ring main unit, which comprises a three-station switch mechanism and a circuit breaker switch mechanism, and comprises a cam A, a cam B, an interlocking plate and a crank arm, wherein the cam A is fixed on an isolation operation shaft of the three-station switch mechanism, the cam B is fixed on a grounding operation shaft of the three-station switch mechanism, the interlocking plate comprises an interlocking plate A, an interlocking plate B and an interlocking plate C, the interlocking plate B is connected with the interlocking plate A and the interlocking plate C, the interlocking plate A is arranged on the cam A and the cam B, the crank arm is fixed on a closing half shaft of the circuit breaker switch mechanism, a limiting part is arranged on the interlocking plate C, and the limiting part limits the crank arm; the limiting function of the cam A on the crank arm can be removed through the interlocking plate when the cam A rotates along with the isolation operating shaft, or the limiting function of the cam B on the crank arm can be removed through the interlocking plate when the cam B rotates along with the grounding operating shaft. By utilizing the partition interlocking structure of the upper isolation lower circuit breaker ring main unit, the power transmission and power failure operations are simple and reliable.
Description
Technical Field
The invention relates to the field of ring main units, in particular to a partition interlocking structure of an upper isolation lower circuit breaker ring main unit.
Background
The existing upper isolation lower circuit breaker ring main unit is in isolation interlocking, and a three-station mechanism cannot be operated when a circuit breaker is switched on. The existing upper-isolation lower-circuit breaker ring main unit breaking-isolation interlocking can meet the requirement of five-prevention interlocking, but can not prevent repeated operation caused by misoperation.
The power transmission operation sequence of the upper isolation lower circuit breaker ring main unit is as follows: the system comprises a door closing part, a breaker opening part, a grounding switch opening part, an isolating switch closing part and a breaker closing part. After the grounding switch is opened, if the operation is wrong, the on-site operator firstly closes the circuit breaker, closes the disconnecting switch which cannot be operated and transmits power, and then returns to the circuit breaker to be opened and then sequentially operates and transmits power.
The power failure sequence of the upper isolation lower circuit breaker ring main unit is circuit breaker opening, disconnecting switch opening, earthing switch closing, circuit breaker closing and door opening. After the disconnecting switch is opened, if the operation is wrong, the field operator firstly closes the circuit breaker, closes the grounding switch which cannot be operated to be grounded, returns to the circuit breaker to be opened and then sequentially operates to stop power supply.
Disclosure of Invention
Therefore, the isolating and interlocking structure of the upper isolating lower circuit breaker ring main unit is needed to be provided, so that the problems that the existing upper isolating lower circuit breaker ring main unit is not time-synchronized in the power transmission operation sequence and the on-off circuit breaker is repeatedly switched on and off are solved.
In order to achieve the above purpose, the inventor provides a partition interlocking structure of an upper-isolation lower-circuit breaker ring main unit, which comprises a three-position switch mechanism and a circuit breaker switch mechanism, wherein the circuit breaker switch mechanism comprises a cam A, a cam B, an interlocking plate and a connecting lever,
the interlocking plate comprises an interlocking plate A, an interlocking plate B and an interlocking plate C, the interlocking plate B is connected with the interlocking plate A and the interlocking plate C, the interlocking plate A is arranged on the cam A and the cam B, the crank arm is fixed on a closing half shaft of the circuit breaker switching mechanism, and the interlocking plate C is provided with a limiting part which limits the crank arm;
the limiting function of the cam A on the crank arm can be removed through the interlocking plate when the cam A rotates along with the isolation operating shaft, or the limiting function of the cam B on the crank arm can be removed through the interlocking plate when the cam B rotates along with the grounding operating shaft.
Furthermore, an interlocking plate notch is formed in the interlocking plate A and corresponds to the cam A, the cam A can rotate in the interlocking plate notch to achieve up-and-down pushing of the interlocking plate A, the lower end of the interlocking plate A is abutted against the cam B, and the cam B rotates to achieve up-and-down pushing of the interlocking plate A;
the interlocking plate A is pushed up and down to change the limiting state of the interlocking plate C on the crank arm.
Furthermore, the interlocking plate C is arranged at the upper ends of the closing half shaft and the connecting lever, the limiting part is arranged at the lower end of the interlocking plate C, and the limiting part plays a limiting role in the connecting lever when being located in the closing direction of the closing half shaft.
Furthermore, an energy storage shaft sliding groove is formed in the interlocking plate C, and an energy storage shaft of the circuit breaker switching mechanism is arranged in the energy storage shaft sliding groove in a penetrating mode.
Further, the extending direction of the energy storage shaft sliding groove is consistent with the up-and-down pushing direction of the interlocking plate A.
Further, still include the operation shaft yoke plate, the operation shaft yoke plate is connected and is kept apart operation axle and ground connection operation axle, interlocking board A and operation shaft yoke plate swing joint.
Furthermore, an interlocking plate sliding groove is formed in the interlocking plate A, the extending direction of the interlocking plate sliding groove is consistent with the vertical pushing direction of the interlocking plate A, a sliding shaft is arranged on the operating shaft coupling plate, and the sliding shaft is arranged in the interlocking plate sliding groove.
Furthermore, an operation shaft coupling plate sliding groove is formed in the operation shaft coupling plate, the extending direction of the operation shaft coupling plate sliding groove is consistent with the vertical pushing direction of the interlocking plate A, a sliding shaft is arranged on the interlocking plate A, and the sliding shaft is arranged in the operation shaft coupling plate sliding groove.
Further, the sliding shaft is a shaft sleeve.
Further, still include the extension spring, the extension spring is connected between interlocking plate and operation coupling plate.
Different from the prior art, the technical scheme has the following advantages: by utilizing the partition interlocking structure of the upper isolation lower circuit breaker ring main unit, on the basis that the original five-prevention interlocking cannot operate the three-station mechanism when the circuit breaker is switched on, the circuit breaker cannot be switched on when the three-station mechanism is added, and the problems that the circuit breaker cannot be switched on and switched off repeatedly when the operation sequence of the upper isolation lower circuit breaker ring main unit is not time-synchronized are solved, so that the upper isolation lower circuit breaker ring main unit is simple and reliable in power transmission and power failure operation.
Drawings
Fig. 1 is a schematic view of a partition interlocking structure of an upper isolation lower circuit breaker ring main unit according to the present embodiment;
fig. 2 is a schematic view of a partition interlocking structure of an upper isolation lower circuit breaker ring main unit according to the present embodiment;
fig. 3 is a schematic diagram of an interlock of a three-position switch mechanism of the upper isolation lower circuit breaker ring main unit according to the embodiment;
fig. 4 is a schematic diagram of the interlocking of the breaker switching mechanism of the upper isolation lower breaker ring main unit according to this embodiment.
Description of reference numerals:
1. a three-position switch mechanism;
2. a circuit breaker switching mechanism;
21. isolating the operating shaft;
22. a ground operating shaft;
23. an energy storage shaft;
24. a switching-on half shaft;
3. a cam A;
4. a cam B;
51. an interlock plate A;
511. an interlock plate notch;
512. an interlock plate chute;
52. an interlock plate B;
53. an interlock plate C;
531. a limiting part;
532. an energy storage shaft chute;
54. a shaft sleeve;
6. operating the coupling plate;
7. a crank arm.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 and 2, the invention provides a partition interlocking structure of an upper isolation lower circuit breaker ring main unit, which includes a three-position switch mechanism 1 and a circuit breaker switch mechanism 2, wherein the three-position switch mechanism is arranged above the circuit breaker switch mechanism in the upper isolation lower circuit breaker ring main unit.
The partition interlocking structure is used for realizing interlocking between the three-position switch mechanism and the breaker switch mechanism, and when an isolating switch or a grounding switch in the three-position switch mechanism is operated to be switched on, the breaker switch can be switched on. In the power transmission operation process of the upper isolation lower circuit breaker ring main unit, if an operator does not operate the isolation switch to switch on, the circuit breaker cannot be operated to switch on; in the power-off operation process of the upper isolation lower circuit breaker ring main unit, if an operator does not operate the earthing switch to switch on, the circuit breaker can not be operated to switch on, and the repeated switching-on and switching-off operations of the circuit breaker due to sequence errors in power transmission or power-off operations are avoided.
As shown in fig. 3, the partition interlocking structure of the upper and lower isolated circuit breaker ring main units further includes a cam A3, a cam B4 and an interlocking plate, the cam a is fixed on an isolated operating shaft 21 of the three-position switch mechanism, and the cam B is fixed on a grounding operating shaft 22 of the three-position switch mechanism.
The interlocking plate includes interlocking plate a 51, interlocking plate B52, and interlocking plate C53, and interlocking plate B connects interlocking plate a and interlocking plate C.
The interlocking plate A is arranged on the cam A and the cam B, and the crank arm 7 is fixed on a closing half shaft 24 of the circuit breaker switching mechanism.
The interlocking plate A is provided with an interlocking plate notch which corresponds to the cam A, one end of the cam A is abutted to the groove wall of the interlocking plate notch, the cam A can rotate in the interlocking plate notch to achieve the effect of pushing the interlocking plate A up and down, so that the interlocking plate C can move up and down, the lower end of the interlocking plate A is abutted to the cam B, and the cam B rotates to achieve the effect of pushing the interlocking plate A up and down. The interlocking plate C can change the limit state of the crank arm by pushing the interlocking plate A up and down.
As shown in fig. 4, the interlock plate C is provided with a stopper 531 for stopping the crank arm and restricting the rotation of the crank arm. When the cam A or the cam B rotates, the position of the interlocking plate C is changed by pushing the interlocking plate A, the interlocking plate C loses a limiting effect on the crank arm, the crank arm can rotate, and an operator can operate the switch-on of the circuit breaker switching mechanism.
In a specific embodiment, the cam A comprises a straight surface and a curved surface, the straight surface of the cam A is abutted to the upper end groove wall of the interlocking plate notch, the curved surface of the cam A is arranged downwards, the lower end of the curved surface of the cam A and the lower end groove wall of the interlocking plate notch are arranged at intervals, the cam A can freely rotate in the interlocking plate notch, the cam A rotates along with the isolation operating shaft and removes the limiting effect on the connecting lever through the interlocking plate, when the isolation operating shaft rotates, the cam A is driven to rotate, the curved surface of the cam A rotates upwards to jack the interlocking plate A upwards, the interlocking plate C loses the limiting effect on the connecting lever, and an operator operates the closing half shaft to close the circuit breaker switching mechanism. The structure of the cam B is similar to that of the cam A, the operation that the cam B rotates along with the grounding operation shaft and removes the limiting effect on the crank arm through the interlocking plate is similar to that of the cam A, and the operation is not repeated.
The interlocking plate C is arranged at the upper ends of the closing half shaft and the connecting lever, the limiting part is arranged at the lower end of the interlocking plate C, the limiting part plays a limiting role on the connecting lever when being located in the closing direction of the closing half shaft, and when the limiting part leaves the closing direction of the closing half shaft, an operator can close the closing half shaft of the circuit breaker.
In order to enhance the structural stability, the interlocking plate C is provided with an energy storage shaft chute 532, and an energy storage shaft 23 of the circuit breaker switching mechanism is arranged in the energy storage shaft chute in a penetrating manner. The extending direction of the energy storage shaft sliding groove is consistent with the up-and-down pushing direction of the interlocking plate A, and the interlocking plate C moves along the direction of the energy storage shaft sliding groove in the process that the interlocking plate A moves up and down.
In order to enhance the structural stability, the partition interlocking structure of the upper isolation lower circuit breaker ring main unit further comprises an operating shaft connecting plate 6, the operating shaft connecting plate is connected with an isolation operating shaft and a grounding operating shaft, and the interlocking plate A is movably connected with the operating shaft connecting plate, so that the interlocking plate is prevented from being separated from the cam A and the cam B in the process that the interlocking plate A moves up and down.
Specifically, an interlocking plate sliding groove 512 is formed in the interlocking plate a, the extending direction of the interlocking plate sliding groove is consistent with the vertical pushing direction of the interlocking plate a, a sliding shaft is arranged on the operating shaft coupling plate, one end of the sliding shaft is fixed on the operating shaft coupling plate, the other end of the sliding shaft penetrates through the interlocking plate sliding groove, and the sliding shaft can slide in the interlocking plate sliding groove, so that the movable connection between the interlocking plate a and the operating shaft coupling plate is realized. In other embodiments, the number of the interlocking plate sliding grooves and the number of the sliding shafts are two or more, which has the advantage that the interlocking plate can be more stable in the process of moving up and down.
Specifically, be provided with operation shaft yoke plate spout on the operation shaft yoke plate, the extending direction of operation shaft yoke plate spout is unanimous with interlocking board A's upper and lower promotion direction, be provided with the slide-bar on the interlocking board A, the slide-bar sets up in operation shaft yoke plate spout, and the slide-bar can slide in operation shaft yoke plate spout to realize the swing joint between interlocking board A and the operation shaft yoke plate. In other embodiments, the number of the operating coupling plate sliding grooves and the number of the sliding shafts are two or more, and the interlocking plate has the advantage that the interlocking plate can be more stable in the up-and-down moving process.
In this embodiment, the slide shaft is a bushing 54. In order to avoid the interlocking plate A from separating from the shaft sleeve, the shaft diameter size of one end, far away from the operating shaft coupling plate, of the shaft sleeve is larger than the shaft diameter size of one end, connected to the operating shaft coupling plate, of the shaft sleeve, and the groove width size of the interlocking plate sliding groove is smaller than the shaft diameter size of one end, far away from the operating shaft coupling plate, of the shaft sleeve.
In other embodiments, the sliding shaft may also be a pin, bolt, screw, or the like.
When the breaker is in a breaking state, the connecting lever is blocked by the limiting part of the interlocking plate C, and the closing half shaft cannot rotate clockwise and cannot be closed. When the isolating switch is switched on, the isolating operation shaft drives the cam A to rotate clockwise by 180 degrees, the interlocking plate A is jacked up, the interlocking plate B and the interlocking plate C are driven to move upwards, and the switching-on half shaft can smoothly rotate and can be switched on.
When the earthing switch-on is carried out, the earthing operation shaft drives the cam B to rotate 180 degrees clockwise, the interlocking plate A is jacked up, the interlocking plate B and the interlocking plate C are driven to move upwards, and the switch-on half shaft can smoothly rotate at the moment to carry out switch-on.
This go up wall interlocking structure of keeping apart lower circuit breaker looped netowrk cabinet still includes the extension spring, the extension spring is connected between interlocking board and operating shaft yoke plate. When the disconnecting switch or the grounding switch is switched off, the tension spring assists gravity to reset the interlocking plate A, the interlocking plate B and the interlocking plate C.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present patent.
Claims (10)
1. The utility model provides a cut off interlocking structure of circuit breaker looped netowrk cabinet under going up to keep apart, includes three station on-off mechanism and circuit breaker on-off mechanism, its characterized in that: comprises a cam A, a cam B, an interlocking plate and a crank arm,
the interlocking plate comprises an interlocking plate A, an interlocking plate B and an interlocking plate C, the interlocking plate B is connected with the interlocking plate A and the interlocking plate C, the interlocking plate A is arranged on the cam A and the cam B, the crank arm is fixed on a closing half shaft of the circuit breaker switching mechanism, and the interlocking plate C is provided with a limiting part which limits the crank arm;
the limiting function of the cam A on the crank arm can be removed through the interlocking plate when the cam A rotates along with the isolation operating shaft, or the limiting function of the cam B on the crank arm can be removed through the interlocking plate when the cam B rotates along with the grounding operating shaft.
2. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 1, characterized in that: the interlocking plate A is provided with an interlocking plate notch which corresponds to the cam A, the cam A can rotate in the interlocking plate notch to realize the up-and-down pushing of the interlocking plate A, the lower end of the interlocking plate A is abutted against the cam B, and the cam B rotates to realize the up-and-down pushing of the interlocking plate A;
the interlocking plate A is pushed up and down to change the limiting state of the interlocking plate C on the crank arm.
3. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 1, characterized in that: the interlocking plate C is arranged at the upper ends of the closing half shaft and the connecting lever, the limiting part is arranged at the lower end of the interlocking plate C, and the limiting part plays a limiting role in the connecting lever when being located in the closing direction of the closing half shaft.
4. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 2, characterized in that: an energy storage shaft sliding groove is formed in the interlocking plate C, and an energy storage shaft of the circuit breaker switching mechanism penetrates through the energy storage shaft sliding groove.
5. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 4, characterized in that: the extending direction of the energy storage shaft sliding groove is consistent with the up-and-down pushing direction of the interlocking plate A.
6. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 1, characterized in that: still include the operation shaft yoke plate, isolation operation axle and ground connection operation axle are connected to the operation shaft yoke plate, interlocking board A and operation shaft yoke plate swing joint.
7. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 6, characterized in that: the interlocking plate A is provided with an interlocking plate sliding groove, the extending direction of the interlocking plate sliding groove is consistent with the vertical pushing direction of the interlocking plate A, the operating shaft coupling plate is provided with a sliding shaft, and the sliding shaft is arranged in the interlocking plate sliding groove.
8. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 6, characterized in that: the interlocking device is characterized in that an operating shaft coupling plate sliding groove is formed in the operating shaft coupling plate, the extending direction of the operating shaft coupling plate sliding groove is consistent with the vertical pushing direction of the interlocking plate A, a sliding shaft is arranged on the interlocking plate A, and the sliding shaft is arranged in the operating shaft coupling plate sliding groove.
9. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 7 or 8, characterized in that: the sliding shaft is a shaft sleeve.
10. The partition interlocking structure of the upper isolation lower circuit breaker ring main unit according to claim 6, characterized in that: still include the extension spring, the extension spring is connected between interlocking plate and operation coupling plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245622.0A CN113078009A (en) | 2021-03-05 | 2021-03-05 | Cut off interlocking structure of circuit breaker looped netowrk cabinet under upper isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110245622.0A CN113078009A (en) | 2021-03-05 | 2021-03-05 | Cut off interlocking structure of circuit breaker looped netowrk cabinet under upper isolation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113078009A true CN113078009A (en) | 2021-07-06 |
Family
ID=76612082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110245622.0A Pending CN113078009A (en) | 2021-03-05 | 2021-03-05 | Cut off interlocking structure of circuit breaker looped netowrk cabinet under upper isolation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113078009A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113936939A (en) * | 2021-09-23 | 2022-01-14 | 申恒电力设备有限公司 | Five-prevention interlocking device |
| CN114388281A (en) * | 2021-12-14 | 2022-04-22 | 北京四方继保工程技术有限公司 | Circuit breaker and earthing switch link gear for looped netowrk cabinet |
| CN114420479A (en) * | 2022-01-21 | 2022-04-29 | 平高集团有限公司 | Cable chamber door interlocking structure of upper three-station ring main unit |
-
2021
- 2021-03-05 CN CN202110245622.0A patent/CN113078009A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113936939A (en) * | 2021-09-23 | 2022-01-14 | 申恒电力设备有限公司 | Five-prevention interlocking device |
| CN113936939B (en) * | 2021-09-23 | 2024-03-01 | 申恒电力设备有限公司 | Five-prevention interlocking device |
| CN114388281A (en) * | 2021-12-14 | 2022-04-22 | 北京四方继保工程技术有限公司 | Circuit breaker and earthing switch link gear for looped netowrk cabinet |
| CN114388281B (en) * | 2021-12-14 | 2024-05-10 | 北京四方继保工程技术有限公司 | Circuit breaker and grounding switch linkage mechanism for ring main unit |
| CN114420479A (en) * | 2022-01-21 | 2022-04-29 | 平高集团有限公司 | Cable chamber door interlocking structure of upper three-station ring main unit |
| CN114420479B (en) * | 2022-01-21 | 2023-11-07 | 平高集团有限公司 | Cable chamber door interlocking structure of upper three-station ring main unit |
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