CN213815928U - Anti-misoperation mechanical locking device for stay cable type combined disconnecting link - Google Patents
Anti-misoperation mechanical locking device for stay cable type combined disconnecting link Download PDFInfo
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- CN213815928U CN213815928U CN202023280594.6U CN202023280594U CN213815928U CN 213815928 U CN213815928 U CN 213815928U CN 202023280594 U CN202023280594 U CN 202023280594U CN 213815928 U CN213815928 U CN 213815928U
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Abstract
A pull-rope type combined disconnecting link anti-misoperation mechanical locking device belongs to the technical field of disconnecting link locking devices and comprises a cam, a locking lever, a fixed shell of the pull-rope lever, a pull rope, a fixed shell of a locking bolt, a bolt spring and a locking plate. The utility model changes the push rod type into the pull rope type. The knife switch transmission shaft drives the cam to rotate, the cam pushes the locking lever to pull the inhaul cable, and the inhaul cable controls the insertion and extraction of the locking bolt to realize mechanical locking between the main isolating switch and the line grounding knife switch. The mechanical locking device can reliably realize mechanical anti-misoperation locking between the three-half connecting wire outlet disconnecting link of 500kV and the line side grounding disconnecting link. The disconnecting link is at the switching-on position, and the switching-on operation of the line side grounding disconnecting link is locked; and closing the line side grounding knife switch and locking the knife switch. And this mechanical blocking device can guarantee that the switch is in the separating brake position, and circuit side ground connection switch can smoothly close a floodgate, does not because of mechanical blocking device bite.
Description
Technical Field
The utility model belongs to the technical field of the switch blocking device, especially relate to a stay cord formula combination switch prevents mistake mechanical blocking device.
Background
The breaking equipment which is connected to the two sides of the breaker in the power system and is used for providing obvious breaking points for equipment maintenance is called a disconnecting link or an isolating switch; equipment that is dedicated to preventing a sudden call from the service equipment and grounds each side of the service equipment is called a grounding switch. In practical applications, the disconnecting link and the grounding disconnecting link are usually installed in a combination manner in order to save the floor space. The combination forms thereof are two types: firstly, operating mechanisms of a disconnecting link and a grounding disconnecting link are arranged on the same framework; and secondly, operating mechanisms of the disconnecting link and the grounding disconnecting link are arranged on different frameworks.
The mechanical locking between the disconnecting link and the grounding disconnecting link is realized by adopting a mechanical principle: the disconnecting link locks the switching-on operation of the grounding disconnecting link at the switching-on position; and the grounding knife switch is in the switch-on position, and the closing operation of the locking knife switch is carried out. I.e. the two devices cannot be in a closed state at the same time.
Because the operating mechanisms of the three-half wiring line grounding knife switch and the main isolating switch are in different structures, great difficulty is brought to mechanical locking.
The prior mechanical locking device connecting structure is shown in fig. 1:
1. crescent locking plates are fixed on transmission shafts of the disconnecting link and the grounding disconnecting link in a direction perpendicular to the axis direction, the crescent locking plates are commonly called as menisci, the left side is provided with a disconnecting link transmission shaft and the menisci thereof, and the right side is provided with a grounding disconnecting link transmission shaft and the menisci thereof.
2. A sliding locking connecting rod is horizontally arranged between the disconnecting link and the meniscus of the grounding disconnecting link, and the connecting rod is fixed on the equipment framework by a bracket.
3. When the disconnecting link is in a closing state, the meniscal notch of the disconnecting link deviates from the locking connecting rod, and the other end of the locking connecting rod is forced to extend into the meniscal notch of the grounding disconnecting link, so that the transmission shaft of the grounding disconnecting link cannot rotate, and the purpose of locking is achieved. The principle of the earthing knife switch closing at the closing position locking knife switch is the same.
The existing mechanical locking device has the problems that a locking connecting rod is too heavy, the included angle between the force application direction of a meniscus and the axial line of the connecting rod is too large, and after a disconnecting link is switched off, the meniscus on the other side still cannot smoothly push the locking connecting rod, so that the locking connecting rod is rejected, and even an operating motor is damaged.
Therefore, there is a need in the art for a new solution to solve this problem.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides a pull-cord formula combination switch prevents mistake mechanical locking device is used for solving current mechanical locking device shutting connecting rod excessively heavy, and meniscus application of force direction and connecting rod axle contained angle are too big moreover, and the back is opened a brake to the switch, and the meniscus of opposite side still can not smoothly promote the shutting connecting rod, causes the shutting connecting rod to refuse to move, damages the technical problem of operating motor even.
The anti-misoperation mechanical locking device of the pull cable type combined disconnecting link comprises a cam, a locking lever, a pull cable lever fixing shell, a pull cable, a locking bolt fixing shell, a locking bolt, a bolt spring and a locking plate,
the middle part of the cam is connected with the knife switch transmission shaft, and the outer part of the cam is in contact connection with one end of the locking lever;
the inhaul cable is of a double-layer structure, the outer layer of the inhaul cable is a steel armor inner core and is a steel wire rope; one end of the steel armor is fixedly connected with the inhaul cable lever fixing shell, and the other end of the steel armor is fixedly connected with the locking bolt fixing shell; the steel wire rope is movably connected with the inner wall of the steel armor, one end of the steel wire rope is fixedly connected with the other end of the locking lever, and the other end of the steel wire rope is fixedly connected with one end of the locking bolt after being sleeved with the bolt spring; one end of the bolt spring is in contact connection with the steel armor, and the other end of the bolt spring is in contact connection with the end of the locking bolt;
the middle part of the locking lever is fixed on the locking bolt fixing shell and rotates relative to the locking bolt fixing shell; the locking bolt fixing shell is provided with a limiting slideway for the sliding of the locking bolt and the bolt spring;
the locking plate is arranged on the transmission shaft of the grounding knife switch, a groove is arranged on the locking plate, and the groove of the locking plate is in clearance fit connection with the other end of the locking bolt.
The locking lever is of an L-shaped structure, a long rod of the locking lever is connected with the outer portion of the cam in a contact mode, and a short rod end of the locking lever is fixedly connected with the steel wire rope.
The steel armor is a spiral steel armor.
Through the above design scheme, the utility model discloses following beneficial effect can be brought:
the utility model changes the push rod type into the pull rope type. The knife switch transmission shaft drives the cam to rotate, the cam pushes the locking lever to pull the inhaul cable, and the inhaul cable controls the insertion and extraction of the locking bolt to realize mechanical locking between the main isolating switch and the line grounding knife switch. The mechanical locking device can reliably realize mechanical anti-misoperation locking between the three-half connecting wire outlet disconnecting link of 500kV and the line side grounding disconnecting link. The disconnecting link is at the switching-on position, and the switching-on operation of the line side grounding disconnecting link is locked; and closing the line side grounding knife switch and locking the knife switch. And this mechanical blocking device can guarantee that the switch is in the separating brake position, and circuit side ground connection switch can smoothly close a floodgate, does not because of mechanical blocking device bite.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is a schematic structural view of a conventional mechanical latch device.
Fig. 2 is a schematic structural view of the anti-misoperation mechanical locking device of the cable-type combined disconnecting link of the present invention.
In the figure, 1-cam, 2-locking lever, 3-guy cable lever fixed shell, 4-guy cable, 5-locking bolt fixed shell, 6-locking bolt, 7-bolt spring, 8-locking plate, 9-knife switch transmission shaft and 10-grounding knife switch transmission shaft.
Detailed Description
As shown in fig. 2, the connection relationship of the components of the pull-cord type combined disconnecting link anti-misoperation mechanical locking device is as follows:
1. the plane of the cam 1 is vertical to the axis of the knife switch transmission shaft 9 and is fixed on the knife switch transmission shaft 9, the outer edge of the cam 1 is contacted with the locking lever 2, and the contact surface of the cam 1 and the locking lever 2 can slide.
2. The inner core of the inhaul cable 4 is a steel wire rope, the outer layer of the inhaul cable is a spiral steel armor, and the steel wire rope can slide in the steel armor. Two ends of an outer layer steel armor of the inhaul cable 4 are respectively propped against the inner clamping grooves of the inhaul cable lever fixing shell 3 and the locking bolt fixing shell 5. One end of the steel wire rope is fixed with the locking lever 2, and the other end of the steel wire rope is fixed with the locking bolt 6. And a bolt spring 7 is sleeved between the locking bolt 6 and the steel armor at one end fixed with the locking bolt 6.
3. The locking lever 2 is fixed at a single point in the cable lever fixing shell 3, the point becomes a lever fulcrum of the locking lever 2, and the locking lever 2 can horizontally rotate around the fulcrum. The locking lever 2 is L-shaped, and the short edge of the locking lever 2 is fixedly connected with the steel wire rope.
4. The cable lever fixing housing 3 is welded to the equipment frame, the weld not being marked in fig. 2.
5. The plane of the locking plate 8 is perpendicular to the axis of the grounding knife switch transmission shaft 10 and is fixed on the grounding knife switch transmission shaft 10. The rectangular groove is larger than the locking bolt 6, and the two are in clearance fit.
6. One end of the locking bolt 6 is fixed with the steel wire rope, and the other end of the locking bolt is matched with the rectangular groove of the locking plate 8 and can be inserted into the groove or pulled out of the groove.
7. The locking bolt 6 and the bolt spring 7 are arranged in a limiting slideway in the locking bolt fixing shell 5, and the locking bolt 6 can freely slide.
8. The locking bolt securing housing 5 is welded to the equipment frame, which is not marked in fig. 2.
The working principle is as follows:
A. when the disconnecting link is closed, the high point of the cam 1 arranged on the disconnecting link transmission shaft 9 deviates from the locking lever 2, and the inner core steel wire rope of the inhaul cable 4 is in a relaxed state. The locking bolt 6 is inserted into the rectangular groove of the locking plate 8 of the earthing knife switch under the elastic force of the bolt spring 7. At the moment, the transmission shaft 10 of the grounding knife switch is locked, if the grounding knife switch is forcibly operated, the overload protection action of the grounding knife switch cuts off the power supply of the motor, and the misoperation prevention locking is realized.
B. After the disconnecting link is disconnected, the cam 1 arranged on the disconnecting link transmission shaft 9 extrudes the locking lever 2 at a high point. The core wire rope of the stay cable 4 is tensioned and the locking bolt 6 is pulled out. At this time, the grounding knife switch transmission shaft 10 is unlocked, and the grounding knife switch can be normally operated.
C. The operation process of the earthing knife switch in the closing locking knife switch is the same as the operation process A.
Claims (3)
1. The anti-misoperation mechanical locking device of the stay cable type combined disconnecting link is characterized in that: comprises a cam (1), a locking lever (2), a guy cable lever fixing shell (3), a guy cable (4), a locking bolt fixing shell (5), a locking bolt (6), a bolt spring (7) and a locking plate (8),
the middle part of the cam (1) is connected with the knife switch transmission shaft (9), and the outer part of the cam (1) is in contact connection with one end of the locking lever (2);
the inhaul cable (4) is of a double-layer structure, and the outer layer of the inhaul cable is a steel armor inner core and is a steel wire rope; one end of the steel armor is fixedly connected with the inhaul cable lever fixing shell (3), and the other end of the steel armor is fixedly connected with the locking bolt fixing shell (5); the steel wire rope is movably connected with the inner wall of the steel armor, one end of the steel wire rope is fixedly connected with the other end of the locking lever (2), and the other end of the steel wire rope is fixedly connected with one end of a locking bolt (6) after being sleeved with a bolt spring (7); one end of the bolt spring (7) is in contact connection with the steel armor, and the other end of the bolt spring (7) is in contact connection with the end of the locking bolt (6);
the middle part of the locking lever (2) is fixed on the locking bolt fixing shell (5) and rotates relative to the locking bolt fixing shell (5); a limiting slideway for sliding the locking bolt (6) and the bolt spring (7) is arranged on the locking bolt fixing shell (5);
the locking plate (8) is arranged on the transmission shaft (10) of the grounding knife switch, a groove is formed in the locking plate (8), and the groove of the locking plate (8) is in clearance fit connection with the other end of the locking bolt (6).
2. The pull-cord type combined disconnecting link anti-misoperation mechanical locking device as claimed in claim 1, wherein: the locking lever (2) is of an L-shaped structure, a long rod of the locking lever (2) is connected with the cam (1) in an external contact mode, and a short rod end of the locking lever (2) is fixedly connected with the steel wire rope.
3. The pull-cord type combined disconnecting link anti-misoperation mechanical locking device as claimed in claim 1, wherein: the steel armor is a spiral steel armor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023280594.6U CN213815928U (en) | 2020-12-30 | 2020-12-30 | Anti-misoperation mechanical locking device for stay cable type combined disconnecting link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023280594.6U CN213815928U (en) | 2020-12-30 | 2020-12-30 | Anti-misoperation mechanical locking device for stay cable type combined disconnecting link |
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| Publication Number | Publication Date |
|---|---|
| CN213815928U true CN213815928U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023280594.6U Active CN213815928U (en) | 2020-12-30 | 2020-12-30 | Anti-misoperation mechanical locking device for stay cable type combined disconnecting link |
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| CN (1) | CN213815928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889353A (en) * | 2021-09-28 | 2022-01-04 | 上海思源高压开关有限公司 | Device for realizing mechanical interlocking function between different operating mechanisms |
-
2020
- 2020-12-30 CN CN202023280594.6U patent/CN213815928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889353A (en) * | 2021-09-28 | 2022-01-04 | 上海思源高压开关有限公司 | Device for realizing mechanical interlocking function between different operating mechanisms |
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Inventor after: Ma Sai Inventor after: Liu Hongyuan Inventor after: Zhang Shuting Inventor after: Yong Tianze Inventor after: Zhang Mingyuan Inventor after: Zhao Xuejun Inventor after: Lin Fuquan Inventor after: Yu Xiping Inventor after: Ma Shuai Inventor after: Feng Yong Kan Inventor after: Hongli Inventor after: Ma Ye Inventor after: Bright red Inventor after: Hongxia Inventor after: Red plum Inventor after: Ma Ding Inventor after: Ma Landi Inventor after: Luo Ge Inventor after: Wang Xinduo Inventor after: Ying Fei Inventor after: Ying Bing Inventor after: Sun Yiqian Inventor after: Zhang Baoguang Inventor after: Xie Beimin Inventor after: Yin Shufeng Inventor after: Yue Fengge Inventor after: Su Liang Inventor after: Cheng Gang Inventor before: Ma Sai Inventor before: Liu Hongyuan Inventor before: Zhang Shuting Inventor before: Yong Tianze Inventor before: Zhang Mingyuan Inventor before: Zhao Xuejun Inventor before: Lin Fuquan Inventor before: Yu Xiping Inventor before: Ma Shuai Inventor before: Feng Yong Kan Inventor before: Hongli Inventor before: Ma Ye Inventor before: Bright red Inventor before: Hongxia Inventor before: Red plum Inventor before: Ma Ding Inventor before: Ma Landi Inventor before: Luo Ge Inventor before: Wang Xinduo Inventor before: Ying Fei Inventor before: Ying Bing Inventor before: Sun Yiqian Inventor before: Zhang Baoguang Inventor before: Xie Beimin Inventor before: Yin Shufeng Inventor before: Yue Fengge Inventor before: Su Liang Inventor before: Cheng Gang |