CN113205979B - Interlocking device between circuit breaker, three-position switch and cable room door - Google Patents
Interlocking device between circuit breaker, three-position switch and cable room door Download PDFInfo
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- CN113205979B CN113205979B CN202110624796.8A CN202110624796A CN113205979B CN 113205979 B CN113205979 B CN 113205979B CN 202110624796 A CN202110624796 A CN 202110624796A CN 113205979 B CN113205979 B CN 113205979B
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- interlocking
- circuit breaker
- locking structure
- lock pin
- plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- Trip Switchboards (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
本发明公开的一种断路器与三工位开关及电缆室门间联锁装置，包括三工位锁止结构、断路器连接及锁定结构和电缆室门锁止结构，其特征在于，还包括刚性结构的第一联锁杆和第二联锁杆，所述三工位锁止结构通过第一联锁杆与所述断路器连接及锁定结构之间实现硬连接联锁，所述断路器连接及锁定结构通过第二联锁杆与所述电缆室门锁止结构之间实现硬连接联锁。本发明用于开关柜的断路器、三工位开关及电缆室门之间的机械联锁，能实现三者之间的逻辑互锁。基本解决了传统软性拉线联锁结构拉线存在卡滞，动作不到位或者时间久后动作不灵活等问题。实现了各功能部件联锁硬连接，极大的提高了联锁的可靠性。
The present invention discloses an interlocking device between a circuit breaker, a three-position switch and a cable room door, comprising a three-position locking structure, a circuit breaker connection and locking structure and a cable room door locking structure, and is characterized in that it also comprises a first interlocking rod and a second interlocking rod of a rigid structure, wherein the three-position locking structure realizes hard-connected interlocking through the first interlocking rod and the circuit breaker connection and locking structure, and the circuit breaker connection and locking structure realizes hard-connected interlocking through the second interlocking rod and the cable room door locking structure. The present invention is used for mechanical interlocking between a circuit breaker, a three-position switch and a cable room door of a switch cabinet, and can realize logical interlocking among the three. It basically solves the problems of the traditional soft pull wire interlocking structure, such as the wire being stuck, the action not being in place or the action being inflexible after a long time. It realizes the hard connection of interlocking of each functional component, which greatly improves the reliability of the interlocking.
Description
Technical Field
The invention relates to the technical field of inflatable cabinets, in particular to a hard connection interlocking device for interlocking relations among a three-station switch, a circuit breaker and a cable chamber door of an inflatable cabinet, and particularly relates to an interlocking device among the circuit breaker, the three-station switch and the cable chamber door.
Background
The gas-insulated metal-enclosed switchgear is increasingly accepted by users in recent years for widespread use due to its good insulating properties, and sealing properties and small footprint. The high reliability, maintenance-free, miniaturized and environment-friendly C-GIS box-type gas-insulated metal-enclosed switchgear is required by more and more transformer substations and medium-voltage users with large capacity, wherein a vacuum circuit breaker and a three-station switch are adopted by a gas-insulated switchgear. When the vacuum circuit breaker is used, a five-prevention interlocking structure is required between the three-station switch and the cable chamber door, and because the three parts are scattered, a soft pull-wire interlocking structure is generally used, the pull-wire structure has clamping stagnation and is not in place in action, and logic interlocking is required between the three parts, so that a reliable hard-connection interlocking device is required.
Disclosure of Invention
The invention aims to solve the technical problems that the existing three-station switch and cable chamber door adopt a soft stay wire type interlocking structure, and the problem that the action is not in place is solved, and provides the interlocking device between the circuit breaker and the three-station switch and between the cable chamber door, wherein all parts of the interlocking device flexibly act in a consistent manner, so that the logical interlocking among the three parts can be realized, and the problem of the traditional soft stay wire interlocking structure is basically solved.
The technical problems to be solved by the invention can be realized by the following technical scheme:
The interlocking device comprises a three-station locking structure, a circuit breaker connecting and locking structure and a cable chamber door locking structure, and is characterized by further comprising a first interlocking rod and a second interlocking rod of a rigid structure, wherein the three-station locking structure is in hard connection interlocking with the circuit breaker through the first interlocking rod, and the circuit breaker connecting and locking structure is in hard connection interlocking with the cable chamber door locking structure through the second interlocking rod.
In a preferred embodiment of the invention, the power input end of the first interlocking rod is interlocked with the three-station locking structure, the power output end of the first interlocking rod is interlocked with the circuit breaker and the locking structure, the power input end of the second interlocking rod is interlocked with the circuit breaker and the locking structure, and the power output end of the second interlocking rod is interlocked with the cable chamber door locking structure.
In a preferred embodiment of the present invention, the three-position locking structure comprises:
the positioning shaft is arranged on the indication disc of the three-position switch and is used for outputting the position state of the three-position switch;
the three-station interlocking plate is axially arranged on the three-station switch and rotates between a locking limit position and an unlocking limit position;
The locking limit column is arranged at the locking limit position of the three-station switch and used for limiting the locking limit position of the three-station interlocking plate;
The locking limiting column is arranged at the unlocking limit position of the three-station switch and used for limiting the unlocking limit position of the three-station interlocking plate;
One end of the three-station interlocking plate reset spring is connected to the mechanism bracket of the three-station switch, the other end of the three-station interlocking plate reset spring is connected to the three-station interlocking plate, and the three-station interlocking plate reset spring is used for driving the three-station interlocking plate to return to the locking limit position from the unlocking limit position;
in a preferred embodiment of the invention, the circuit breaker connection and locking structure is mounted within a circuit breaker side panel comprising:
The linkage plate is movably arranged on the side plate of the circuit breaker and can move up and down;
the main shaft linkage plate is arranged on the main output shaft of the circuit breaker and synchronously rotates along with the main output shaft of the circuit breaker, the linkage plate is released when the circuit breaker is in a closing state, the linkage plate moves up and down, and the linkage plate is locked to prohibit the upward and downward movement when the circuit breaker is in a breaking state;
the power output end of the first interlocking rod is adjustably connected with the first pull rod fixing block so as to adjust the height position of the first interlocking rod;
the power input end of the second interlocking rod is adjustably connected with the second interlocking rod fixing block so as to adjust the height position of the second interlocking rod;
The circuit breaker electric brake-separating control change-over switch is arranged on a side plate of the circuit breaker, and when the linkage plate is lifted and unlocked, the circuit breaker electric brake-separating control change-over switch is cut off, and at the moment, the circuit breaker electric brake-separating control is disconnected, so that electric brake-separating cannot be carried out.
In a preferred embodiment of the present invention, the cable chamber door locking structure comprises:
a lock pin mounted on the power output end of the second interlock lever;
A lock tongue installed on the cable chamber door, which is inserted and locked by the lock tongue;
And the lock pin baffle plate is arranged in the cable chamber and is lifted and unlocked under the action of a lock pin baffle plate reset spring, so that the lock tongue is pushed out to open the cable chamber door and block the lock pin to prevent falling.
In a preferred embodiment of the present invention, the cable chamber door locking structure further comprises:
The lock pin guide shell is arranged in the cable chamber, the lock pin baffle plate is arranged in the lock pin guide shell, the lock pin guide shell guides the lock pin and the lock pin baffle plate, so that the lock pin can be accurately inserted into a lock bolt hole on a lock bolt and ensure the correct movement of the lock pin baffle plate, one end of a lock pin baffle plate reset spring is connected with the lock pin baffle plate, and the other end of the lock pin baffle plate reset spring is connected with the lock pin guide shell.
Due to the adoption of the technical scheme, the invention relates to an interlocking device between a breaker and a three-station switch and between cable chamber doors, which is used for mechanical interlocking among the breaker, the three-station switch and the cable chamber doors of a switch cabinet and can realize logical interlocking among the breaker, the three-station switch and the cable chamber doors. Basically solves the problems that the traditional soft stay wire interlocking structure stays in a clamping way, the action is not in place or the action is inflexible after a long time, and the like. The interlocking hard connection of the functional components is realized, and the interlocking reliability is greatly improved.
Drawings
Fig. 1 is an elevation view of an interlock between a circuit breaker and a three-position switch and cable chamber door of the present invention.
Fig. 2 is a side partial cross-sectional view of the interlock between a circuit breaker and a three-position switch and cable chamber door of the present invention.
Fig. 3 is a schematic diagram of the interlocking device between the breaker and the three-station switch and between the cable chamber doors in the breaker opening state.
Fig. 4 is a schematic diagram of the interlocking device between the breaker and the three-position switch and between the cable chamber doors in the breaker closing state.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Referring to fig. 1 and 2, a circuit breaker and three-position switch and cable chamber door interlock is shown, comprising a three-position locking structure 10, a circuit breaker connection and locking structure 20, and a cable chamber door locking structure 30.
Compared with the problems that the pull wire structure is blocked and the action is not in place due to the soft pull wire type interlocking structure adopted between the three-station locking structure 10, the circuit breaker connecting and locking structure 20 and the cable chamber door locking structure 30 at present, the invention provides a five-prevention interlocking among the circuit breaker, the three-station switch and the cable chamber door by adopting a hard connection interlocking mode among the three-station locking structure, the circuit breaker connecting and locking structure and the cable chamber door locking structure.
The specific core scheme is as follows:
The three-position locking structure 10 is hard-connected and interlocked with the circuit breaker connecting and locking structure 20 through the first interlocking rod 40, and the circuit breaker connecting and locking structure 20 is hard-connected and interlocked with the cable chamber door locking structure 30 through the second interlocking rod 50.
The three-station locking structure 10 comprises a positioning shaft 11, a three-station interlocking plate 12, a locking limit post 13, an unlocking limit post 14 and a three-station interlocking plate reset spring 15.
The positioning shaft 11 is mounted on the indicating plate 61 of the three-position switch 60, and the positioning shaft 11 rotates along with the indicating plate 61 to output the position state of the three-position switch 60. When the positioning shaft 11 rotates along with the indicating disc 61, the positioning shaft can be contacted with the three-station interlocking plate 12 to drive the three-station interlocking plate 12 to rotate to an unlocking limit position, or is separated from contact with the three-station interlocking plate 12, so that the three-station interlocking plate 12 is reset to the limit locking position under the action of the three-station interlocking plate reset spring 15.
The three-position interlocking plate 12 is fixed on the three-position switch 60 through a shaft 12a and a screw, and the three-position interlocking plate 12 can rotate around the shaft 12a and rotate between a locking limit position and an unlocking limit position under the action of the positioning shaft 11 and the three-position interlocking plate reset spring 15.
The locking limit posts 13 and the unlocking limit posts 14 are respectively arranged at the locking limit position and the unlocking limit position of the three-position switch 60 and positioned at the left side and the right side of the rotation direction of the three-position interlocking plate 12, and are used for limiting the locking limit position and the unlocking limit position of the three-position interlocking plate 12, when the three-position interlocking plate 12 touches the locking limit posts 13, the locking limit position is reached, and when the three-position interlocking plate 12 touches the unlocking limit posts 13, the unlocking limit position is reached.
One end of the three-position interlocking plate reset spring 15 is connected to the mechanism bracket of the three-position switch 60, and the other end is connected to the three-position interlocking plate 12.
When the three-position interlock plate 12 is in the extreme lock position, the first interlock lever 40 cannot be lifted.
The circuit breaker connecting and locking structure 20 is mounted in a side plate 71 of the circuit breaker 70, and comprises a linkage plate 21, a main shaft linkage plate 22, a first pull rod fixing block 23, a second pull rod fixing block 24 and a circuit breaker electric brake-separating control change-over switch 25.
The linkage plate 21 is movably mounted on the side plate 71 of the circuit breaker 70 through a movable mounting column 21a and is movable up and down, and the first and second link fixing blocks 23 and 24 are fixedly mounted at appropriate positions of the linkage plate 21 so as to be hard-coupled with the first and second link levers 40 and 50, respectively.
The main shaft linkage plate 22 is mounted on the main output shaft 72 of the circuit breaker 70 and rotates synchronously with the main output shaft 72 of the circuit breaker 70, and releases the linkage plate 21 when the circuit breaker 70 is in a closing state, so that the linkage plate 21 moves up and down. The lock link plate 21 prohibits its up-and-down movement when the circuit breaker 70 is in the open state.
The power input end of the first interlock lever 40 is interlocked with the three-position locking structure 10 and a lifting button 41 is provided at the power input end of the first interlock lever 40 for lifting and unlocking when the circuit breaker is in an unlocked state with the three-position switch and the cable chamber door interlock device.
The power output end of the first interlock lever 40 is connected with the circuit breaker and the locking structure 20 is interlocked, specifically, the power output end of the first interlock lever 40 is connected with the first pull rod fixing block 23 by screw threads, and the height position of the first interlock lever 40 can be adjusted by rotating the first interlock lever 40.
The power input end of the second interlocking rod 50 is connected with the circuit breaker and the locking structure 20 is interlocked, specifically, the power input end of the second interlocking rod 50 is connected with the second pull rod fixing block 24 in a threaded manner, and the height position of the second interlocking rod 50 can be adjusted by rotating the second interlocking rod 50.
The second interlocking lever 50 may be constructed of two sections of lever that are hinged together in an L-shape.
The cable chamber door locking structure 30 includes a lock pin 31, a lock tongue 32, a lock pin shutter return spring 33, a lock pin shutter 34, and a lock pin guide housing 35.
The power output end of the second interlock lever 50 is interlocked with the cable chamber door locking structure 30, specifically, the locking pin 31 is mounted on the power output end of the second interlock lever 50.
The lock tongue 32 is mounted on a cable door (not shown) and is inserted and locked by the lock pin 31. The lock pin guide housing 35 is installed in a cable chamber (not shown in the drawings), and the lock pin shutter 34 is installed in the lock pin guide housing 35, and the lock pin guide housing 35 guides the lock pin 31 and the lock pin shutter 34 so that the lock pin 31 can be accurately inserted into a lock pin hole (not shown in the drawings) on the lock pin 32 and correct movement of the lock pin shutter 34 is ensured.
One end of a lock pin baffle plate reset spring 33 is connected with a lock pin baffle plate 34, the other end of the lock pin baffle plate is connected with a lock pin guide shell 35, and the lock pin baffle plate 34 is lifted up and unlocked under the action of the lock pin baffle plate reset spring to push out a lock tongue 32 to open a cable chamber door and block a lock pin 31 to prevent falling down
Referring to fig. 3 and 4 in combination with fig. 1 and 2, the operating principle of the interlocking device between the breaker and the three-position switch and between the three-position switch and the cable chamber door of the invention is as follows:
When the three-position switch 60 is operated to the grounding position, the positioning shaft 11 on the indicating disc 61 pushes the three-position interlocking plate 12 to rotate around the shaft 12a to the limit unlocking position, namely, the up-and-down movement position of the first interlocking rod 40 is released, at this time, the three-position interlocking plate 12 is blocked by the unlocking limiting post 14, and the three-position switch 60 is indicated to unlock the interlocking position. Otherwise, the positioning shaft 11 leaves the pushing position and is separated from contact with the three-station interlocking plate 12, the three-station interlocking plate reset spring 15 drives the three-station interlocking plate 12 to reset to the limit locking position, the three-station interlocking plate is limited to move and locked at the limit locking position by the locking limiting column 13, and the three-station interlocking plate returns to the locking position of the three-station locking structure 10.
The first interlock lever 40 and the second interlock lever 50 are interlocked between the three-position locking structure 10 and the cable chamber door locking structure 30 in series through the first pull rod fixing block 23 and the second pull rod fixing block 24 on the interlock plate 21, when the circuit breaker 70 is closed, the main shaft interlock plate 22 mounted on the main output shaft 72 of the circuit breaker 70 releases the interlock plate 21, at this time, the locking structure in the circuit breaker 70 is unlocked, and when the lifting knob 41 is lifted up, the interlock plate 21 is lifted up through the first interlock lever 40.
When the linkage plate 21 is lifted, the electric brake-separating control switch 25 of the circuit breaker is cut off and the brake-separating button push rod 73 is blocked, the lock pin 31 and the lock pin baffle 34 are arranged in the lock pin guide shell 35 and control the guiding and limiting positions of the two parts, the lock pin 31 can be lifted together, the lock tongue 32 is released, the lock pin baffle 34 pushes the lock tongue 32 out to open the cable chamber door under the pushing of the lock pin baffle reset spring 33, the lock pin baffle 34 blocks the falling position of the lock pin 31, the whole set of circuit breaker, the three-station switch and the cable chamber door interlocking device are in an unlocking state, the cable chamber door is closed after maintenance is finished, the lock pin baffle 34 is pushed back by the lock tongue 32, and the lock pin 31, the whole set of circuit breaker, the three-station switch and the cable chamber door interlocking device are in an interlocking state due to gravity.
In summary, when the three-position switch 60 is at the grounding position, the circuit breaker 70 is at the closing position, and the whole cabinet is in the grounding state, the limit of the interlocking position of the whole set of circuit breaker, the three-position switch and the interlocking device between the cable chamber doors is released, the lifting door is allowed to be unlocked, the cable chamber doors are opened for overhauling or maintenance, the circuit breaker 70 cannot be opened in the maintenance state, the three-position switch 60 cannot be operated due to the interlocking between the circuit breakers 70, and the whole overhauling state is ensured to be safe and controllable.
When the three-position switch 60 or any part of the breaker 70 does not meet the condition of opening the cable chamber door, the door cannot be opened, when the cable chamber door is closed after maintenance is finished, the breaker 70 is opened, the whole set of the breaker, the three-position switch and the interlocking device between the cable chamber door are in an automatic unlocking state, the follow-up operation can be performed, and the operation safety is ensured.
The invention provides an interlocking device between a breaker and a three-station switch as well as between cable chamber doors, which meets the five-prevention interlocking requirement of a switch cabinet, avoids the defects of the traditional stay wire structure and the soft connecting structure, has a simple structure and few parts, and can meet the requirement of a transformer substation on the high reliability of the five-prevention interlocking of the switch cabinet.
The foregoing is merely a preferred example of the present invention, and although the present invention has been described in detail by way of the above preferred example, various modifications and substitutions of the present invention will be apparent to those skilled in the art in light of the technical teaching provided herein, and these should also be construed as protecting the scope of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624796.8A CN113205979B (en) | 2021-06-04 | 2021-06-04 | Interlocking device between circuit breaker, three-position switch and cable room door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624796.8A CN113205979B (en) | 2021-06-04 | 2021-06-04 | Interlocking device between circuit breaker, three-position switch and cable room door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113205979A CN113205979A (en) | 2021-08-03 |
| CN113205979B true CN113205979B (en) | 2025-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110624796.8A Active CN113205979B (en) | 2021-06-04 | 2021-06-04 | Interlocking device between circuit breaker, three-position switch and cable room door |
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| Country | Link |
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| CN (1) | CN113205979B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114220680B (en) * | 2022-01-10 | 2025-08-15 | 广蓝电气设备有限公司 | Ring main unit interlocking device and ring main unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206712261U (en) * | 2017-06-06 | 2017-12-05 | 信阳师范学院 | Cabinet door interlocking mechanism and the switch cubicle using the cabinet door interlocking mechanism |
| CN112509836A (en) * | 2020-12-01 | 2021-03-16 | 上海平高天灵开关有限公司 | Linkage type interlocking structure for switch cabinet |
| CN215220633U (en) * | 2021-06-04 | 2021-12-17 | 上海平高天灵开关有限公司 | Interlocking device between circuit breaker, three-position switch and cable chamber door |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3026460B2 (en) * | 1991-03-15 | 2000-03-27 | 株式会社東芝 | Switch mechanical interlock |
| CN202771994U (en) * | 2012-07-16 | 2013-03-06 | 上海天灵开关厂有限公司 | Mechanical interlocking device applied between line grounding and cable chamber door of cubicle gas insulated switchgear |
| CN102751118B (en) * | 2012-07-23 | 2014-12-10 | 江苏大全长江电器股份有限公司 | Lower door interlocking mechanism for switch cabinet |
| CN103295816B (en) * | 2013-06-21 | 2015-02-04 | 无锡中科电气设备有限公司 | Anti-misoperation mechanical interlocking device for cabinet |
| CN107564747B (en) * | 2017-09-29 | 2020-03-17 | 国家电网公司 | Interlocking device of solid insulation cabinet and working method thereof |
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2021
- 2021-06-04 CN CN202110624796.8A patent/CN113205979B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206712261U (en) * | 2017-06-06 | 2017-12-05 | 信阳师范学院 | Cabinet door interlocking mechanism and the switch cubicle using the cabinet door interlocking mechanism |
| CN112509836A (en) * | 2020-12-01 | 2021-03-16 | 上海平高天灵开关有限公司 | Linkage type interlocking structure for switch cabinet |
| CN215220633U (en) * | 2021-06-04 | 2021-12-17 | 上海平高天灵开关有限公司 | Interlocking device between circuit breaker, three-position switch and cable chamber door |
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| CN113205979A (en) | 2021-08-03 |
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