CN203445024U - Locking device of earthing switch and earthing switch comprising same - Google Patents
Locking device of earthing switch and earthing switch comprising same Download PDFInfo
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- CN203445024U CN203445024U CN201320488171.4U CN201320488171U CN203445024U CN 203445024 U CN203445024 U CN 203445024U CN 201320488171 U CN201320488171 U CN 201320488171U CN 203445024 U CN203445024 U CN 203445024U
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- hole
- lock
- locking
- operating shaft
- locking device
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- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000003550 marker Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000005570 vertical transmission Effects 0.000 description 1
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Abstract
The utility model provides a locking device of an earthing switch and an earthing switch comprising the same. The locking device of the earthing switch comprises an operation shaft (2) which is provided with a first locking hole (27); a fixing piece (4) which is provided with a hole (9) used for accommodating the operation shaft (2) and is further provided with a second locking hole (6) corresponding to the first locking hole (27); and a lock (1), a lock bolt (5) of which can penetrate through the first lock hole (27) and the second lock hole (6) to move. The locking device of the earthing switch of the utility model is capable of safely and reliably locking the work state of the earthing switch.
Description
Technical Field
The utility model relates to a blocking device, concretely relates to blocking device of ground connection sword. The utility model discloses still relate to a grounding switch including this blocking device.
Background
In the present high-voltage power distribution system, the high-voltage frequency converter is provided with the grounding knife, and the grounding knife can be closed during maintenance, so that the safety grounding is realized, and the safety performance is improved. When the high-voltage inverter is in operation, the condition that the grounding knife is closed can possibly occur, and the operating voltage of the high-voltage inverter is high, so that equipment is easily damaged, even a large-area power failure phenomenon is caused, the reliability of a power system is adversely affected, and the grounding knife is required to be kept in an off state.
At present, in order to stably keep the grounding knife in a closed or open state and avoid potential safety hazards and inconvenience caused by misoperation, the grounding knife needs to be locked, namely, the position of the grounding knife is locked.
Chinese patent (publication No. CN 202996638U) discloses a ground wire locking device, which comprises a casing, a locking pin transversely disposed at the front end of the casing and engaged with a locking hole of a knife blade vertical transmission operation connecting rod, a first locking hole engaged with the locking pin, a second locking hole communicated with the end of the first locking hole and passing through the middle of the casing, wherein the extending direction of the axis of the second locking hole is perpendicular to the extending direction of the axis of the first locking hole, a ground bolt inserted in the second locking hole, a locking nut connected to the extending end of the ground bolt, and a switch switching device engaged with a switch loop of an electric power system disposed below the casing. However, the existing locking device is complex in structure, the size required for installing the grounding switch locking device is large, and the size of the whole high-voltage inverter cabinet body cannot be reduced. There is therefore a need for a locking device which is simple in construction, easy to install and which locks the earthing switch securely.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned prior art, the utility model aims at providing a locking device of ground sword to realize the operating position of locking ground sword.
In order to achieve the above object, an embodiment of the present invention provides a locking device for a grounding switch, including:
the operating shaft is provided with a first locking hole; the fixing piece is provided with a hole for accommodating the operating shaft, and the fixing piece is also provided with a second lock hole corresponding to the first lock hole; and the lock tongue of the lock can pass through the first lock hole and the second lock hole to move.
The utility model discloses a locking device of earthing knife simple structure, it is with low costs, can safe and reliable fix the earthing knife at off-state.
Preferably, the operating shaft has an operating portion with a non-circular cross section. More preferably, the cross section of the operation part is hexagonal, square or rectangular. The non-circular operating portion facilitates the clamping of a rotary clamping tool on the operating portion to rotate the operating shaft to change the operating condition of the ground engaging knife.
Preferably, the cross section of the positioning end is circular and is matched with the circular hole of the fixing piece. The positioning end with the circular cross section has small resistance to rotation in the circular hole of the fixing piece.
Preferably, the locking device further comprises a linkage ring, the cross section of the positioning end is non-circular, the linkage ring is provided with a circular outer side face, the linkage ring is provided with a positioning hole which is coaxial with the positioning end and matched with the positioning end, the positioning end is located in the positioning hole, the linkage ring is located in a circular hole of the fixing part, and the linkage ring is provided with a third locking hole which is coaxial with the shaft of the first locking hole. More preferably, the cross section of the positioning end is hexagonal, square or rectangular. The link ring may be used in conjunction with a variety of retaining ends.
Preferably, an axial direction of the first locking hole is perpendicular to an axial direction of the operating shaft. This facilitates installation and keyhole alignment.
Preferably, the linkage ring is provided with a position marker for marking the position of the linkage ring relative to the fixing piece. The working state of the grounding knife can be conveniently and simply judged through the position marker.
Preferably, in the locking device of the earthing switch of the present invention, the lock is an electromagnetic lock.
The utility model discloses still claim the protection one kind including this blocking device's earthing switch.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,
fig. 1 is an exploded perspective view of a locking device of a grounding switch according to a first embodiment of the present invention.
Fig. 2 is a perspective view of a locking device of a grounding switch according to a first embodiment of the present invention.
Fig. 3 is a perspective view of the locking device of the grounding switch and the grounding switch according to the first embodiment of the present invention.
Fig. 4 is an exploded perspective view of a locking device of a grounding switch according to a second embodiment of the present invention.
Fig. 5 is an exploded perspective view of a locking device of a grounding switch according to a third embodiment of the present invention.
Fig. 6 is an exploded perspective view of a locking device of a grounding switch according to a fourth embodiment of the present invention.
Fig. 7 is an exploded perspective view of a locking device of a grounding switch according to a fifth embodiment of the present invention.
Symbolic description of main devices
1 electromagnetic lock
2 operating shaft
3 linking ring
4 fixing part
5 bolt
6 lock hole
7 lock hole
8 positioning hole
9 round hole
10 positioning end
11 operating part
12 toggle piece
13 move the tool bit
14 fixed cutter head
15 earthing knife main shaft
16 earthing knife
17 locating end
18 lock hole
19 operating shaft
20 positioning end
21 operating shaft
23 operating part
24 operating shaft
25 operating shaft
26 locating end
27 lock hole
28 annular flange
29 position marker
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is an exploded perspective view of a locking device of a grounding switch according to a first embodiment of the present invention. As shown in fig. 1, the electromagnetic lock comprises an electromagnetic lock 1, an operating shaft 2, a linkage ring 3 and a fixing piece 4. The electromagnetic lock 1 is provided with a bolt 5, the bolt 5 is in a cylindrical shape, the bolt 5 can be controlled to move along the axis through electrification, and when the electromagnetic lock is powered off unexpectedly, the bolt 5 can be stirred to move along the axis through a stirring piece 12 which is mechanically connected with the bolt 5. One end of the operating shaft 2 has a positioning end 10 and an operating part 11 close to the positioning end 10, the positioning end 10 is a hexagonal prism, and the operating part 11 is also a hexagonal prism. The outer side surface of the linkage ring 3 is circular, and the linkage ring 3 is provided with a positioning hole 8 which can just accommodate the positioning end 10. The shape of the positioning hole 8 and the shape and size of the positioning end 10 are matched, so that the positioning end 10 can be just positioned in the positioning hole 8. The positioning hole 8 is also hexagonal prism shaped, so that the link ring 3 has an inner side surface in the shape of a hexagonal prism surface. The link ring 3 has a lock hole 7 penetrating the inner surface and the outer surface, and an annular flange 28 is provided at one end of the link ring 3. The fixing piece 4 is provided with a round hole 9, the round hole 9 is located at the center of the fixing piece 4 and is coaxially arranged with the linkage ring 3, the diameter of the round hole 9 is larger than that of the circumference of the outer side face of the linkage ring 3, therefore, the linkage ring 3 can be accommodated, the fixing piece 4 is in a circular ring shape, and the fixing piece 4 is provided with a lock hole 6 penetrating through the inner side face and the outer side face. And when the link ring 3 is located in the circular hole 9 of the mount 4, the locking hole 6 and the locking hole 7 are coaxially arranged, i.e. aligned with each other. The locking hole 6 and the locking hole 7 can be the same size or different sizes.
Fig. 2 is a perspective view of a locking device of a grounding switch according to a first embodiment of the present invention. As shown in fig. 2, the positioning end 10 of the operating shaft 2 is located in the positioning hole 8 (see fig. 1) of the link ring 3, and at this time, since the positioning end 10 has a hexagonal prism shape, the operating shaft cannot rotate around the link ring 3 in the positioning hole 8 when the positioning end 10 is inserted into the positioning hole 8. The linkage ring 3 is located in the round hole 9 of the fixing piece 4, so that the operation shaft 2, the linkage ring 3 and the fixing piece 4 are coaxially arranged, and the operation shaft 2, the linkage ring 3 and the fixing piece 4 are sequentially arranged from inside to outside in the radial direction. And the locking hole 6 and the locking hole 7 (see fig. 1) are aligned with each other by rotating the link ring 3. The bolt 5 is located in the lock hole 6 and the lock hole 7 at the same time, and can move along the lock hole 6 and the lock hole 7. When the latch bolt 5 moves and is simultaneously located in the lock hole 6 and the lock hole 7, the link ring 3 and the fixing member 4 are fixed together, and the operating shaft 2 cannot rotate at this time because the operating shaft 2 is inserted into the positioning hole 8 of the link ring 3 and cannot rotate relative to the link ring 3. When the lock tongue 5 is not in the lock hole 7, the rotating operation part 11 can drive the link ring 3 to rotate in the same direction.
In this embodiment, the axial directions of the locking hole 6 and the locking hole 7 and the axial direction of the operating shaft may be perpendicular, so that the locking hole 6 and the locking hole 7 are vertically aligned up and down, which facilitates the insertion of the locking tongue 5 into the locking hole 6 and the locking hole 7. In addition, the locking tongue 5 may also have a conical shape, i.e. the diameter of the insertion locking hole 7 is smaller than the diameter of the insertion locking hole 6.
In other modified structures of this embodiment, the positioning end 10 may be another number of prisms such as triangular prism, quadrangular prism, etc., and may also be any other shapes such as elliptical cylinder, conical body, and any combination shape therebetween, as long as the cross section of the positioning end 10 is non-circular. The operation portion 11 may be located at another position of the operation shaft 2, and similarly, the operation portion 11 may be another prism such as a triangular prism, a quadrangular prism, or the like, and may be an elliptical cylinder, a conical body, any combination shape thereof, or any other shape as long as the cross section of the operation portion 11 is non-circular. The cross section of the operation portion 11 is preferably a cube, a rectangular parallelepiped, a regular hexagonal prism, or a regular octagonal prism. This makes it easy to hold the operation portion 11 with a rotating tool such as a wrench to rotate the operation shaft 2.
Fig. 3 is a perspective view of the locking device of the grounding switch and the grounding switch according to the first embodiment of the present invention. As shown in fig. 3, the grounding bar 16 includes: a moving blade head 13; and a grounding knife main shaft 15 fixedly connected with the moving knife head 13; and a fixed cutter head 14 provided corresponding to the movable cutter head 13. Fig. 3 shows the grounding switch 16 open. By coaxially arranging and detachably fixing the operating shaft 2 and the grounding knife main shaft 15 together, when the grounding knife 16 needs to be closed (i.e. the movable knife head 13 and the fixed knife head 14 are electrically connected), the electromagnetic lock 1 is controlled by electrifying to enable the bolt 5 to move upwards (i.e. to be pulled out from the lock hole 7 (shown in figure 1)), then the bolt is clamped on the operating part 11 by a rotating tool (such as a wrench), the operating part 11 is rotated to drive the grounding knife main shaft 15 to rotate, then the movable knife head 13 and the fixed knife head 14 are contacted, and the grounding knife 16 is closed, i.e. in a grounding state. When the grounding knife 16 is required to be in a disconnected state, the grounding knife is clamped on the operating part 11 through a rotating tool, the operating part 11 is rotated and drives the grounding knife main shaft 15 to rotate, so that the movable knife head 13 is separated from the fixed knife head 14, the lock hole 7 rotates to be aligned with the lock hole 6 up and down, the lock tongue moves downwards through the electromagnetic lock 1 and is inserted into the lock hole 6 and the lock hole 7, and the movable knife head 13 is fixed in a disconnected state with the fixed knife head. The operating part 11 cannot rotate at this time, so that the power supply of the grounding knife can be continuously ensured.
Fig. 4 is an exploded perspective view of a locking device of a grounding switch according to a second embodiment of the present invention. It is substantially the same as fig. 1 except that the locking device is omitted with the link ring 3 of fig. 1 and has a locking hole 18 in the positioning end 17 of the operating shaft 19 perpendicular to the axis of the operating shaft 19, the locking hole 18 being aligned with the locking hole 6 and the latch bolt 5 when the positioning end 17 is in the circular hole 9 of the holder 4. In the present embodiment, the size of the positioning end 17 is smaller than the diameter of the circular hole 9 so that the positioning end 17 can rotate in the circular hole 9, and in addition, the latch 5 has a length that can be inserted into the lock hole 18 and the lock hole 6 at the same time.
Fig. 5 is an exploded perspective view of a locking device of a grounding switch according to a third embodiment of the present invention. Which is substantially the same as fig. 4 except that the positioning end 20 of the operating shaft 21 is cylindrical and the diameter of the positioning end 20 is smaller than that of the circular hole 9, the circular outer side of the positioning end 20 is easily rotatable in the circular hole 9.
Fig. 6 is an exploded perspective view of a locking device of a grounding switch according to a fourth embodiment of the present invention. It is substantially the same as fig. 5 except that the operation portion 23 of the operation shaft 24 has a square cross section, that is, the operation portion 23 is a cube or a rectangular parallelepiped.
Fig. 7 is an exploded perspective view of a locking device of a grounding switch according to a fifth embodiment of the present invention. Which is substantially the same as fig. 1 except that the positioning end 26 of the operating shaft 25 has a locking hole 27 therein perpendicular to the axis of the operating shaft 25, the locking hole 27, the locking hole 7 and the locking hole 6 being aligned when the positioning end 26 is located in the positioning hole 8 of the link ring 3. The annular flange 28 is provided with a position indicator 29 on the side surface thereof, in this embodiment, the position indicator 29 is a scribed line having a certain thickness, when the locking hole 7 and the locking hole 6 are aligned, i.e. the grounding switch is open, the position indicator 29 is located at one position, and when the locking hole 7 is rotated relative to the locking hole 6, i.e. the grounding switch is closed, the position indicator 29 is located at the other position, so that the working state of the grounding switch can be conveniently determined. In other embodiments, the position markers may be protrusions, recesses or grooves of various shapes, or may be tapes or paints having a color that is clearly contrasted with the color of the link ring, as long as the position markers are not located on the outer side surface and the inner side surface of the link ring.
The utility model discloses a locking device of ground connection sword simple structure, it is small, with low costs, and the simple to operate of ground connection sword to disconnection and the closure of realization ground connection sword that can be convenient.
The technical personnel in the field can know, the utility model discloses a locking device of earthing knife does not restrict and is arranged in the high-voltage inverter, can also be arranged in other consumer and carries out safety protection, avoids the potential safety hazard scheduling problem that this consumer maloperation brought.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (10)
1. A grounding switch latch, said latch comprising:
an operating shaft (2), the operating shaft (2) being provided with a first locking hole (27);
the fixing piece (4), the fixing piece (4) is provided with a hole (9) used for accommodating the operating shaft (2), and the fixing piece (4) is further provided with a second lock hole (6) corresponding to the first lock hole (27); and
the lock comprises a lock (1), wherein a bolt (5) of the lock (1) can penetrate through the first lock hole (27) and the second lock hole (6) to move.
2. A earthing switch latching device according to claim 1, characterized in that the operating shaft (2) has an operating portion (11) with a non-circular cross-section.
3. A earthing switch locking device according to claim 1 or 2, characterized in that the operating shaft (2) has a locating end (17), the cross-section of the locating end (17) being circular to fit into the hole (9) of the fixing member (4).
4. A knife grounding switch blocking device as claimed in claim 1, characterized in that it further comprises a link ring (3), the cross-section of the positioning end (17) is non-circular, the link ring (3) has a circular outer side, the link ring (3) has a positioning hole (8) coaxial with the positioning end (17) and cooperating with the positioning end (17), the positioning end (17) is located in the positioning hole (8), the link ring (3) is located in the hole (9) of the fixing part (4), and the link ring (3) has a third locking hole (7) arranged coaxially with the axis of the first locking hole (27).
5. A earthing switch blocking device according to claim 1, characterized in that the axial direction of the first locking hole (27) is perpendicular to the axial direction of the operating shaft (2).
6. A earthing knife latch according to claim 2, characterized in that the operating part (11) is hexagonal, square or rectangular in cross-section.
7. A earthing knife latch according to claim 4, characterized in that the cross-section of the locating end (17) is hexagonal, square or rectangular.
8. A earthing knife latch according to claim 4, characterized in that the link ring (3) has position indicators for indicating the position of the link ring (3) relative to the fixing member.
9. A earthing knife locking device according to claim 1, characterized in that the lock (1) is an electromagnetic lock.
10. A grounding switch comprising the lockout device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320488171.4U CN203445024U (en) | 2013-08-09 | 2013-08-09 | Locking device of earthing switch and earthing switch comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320488171.4U CN203445024U (en) | 2013-08-09 | 2013-08-09 | Locking device of earthing switch and earthing switch comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203445024U true CN203445024U (en) | 2014-02-19 |
Family
ID=50096050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320488171.4U Expired - Lifetime CN203445024U (en) | 2013-08-09 | 2013-08-09 | Locking device of earthing switch and earthing switch comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203445024U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465162A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Electric load disconnection earthing knife-switch interlocking device |
| CN112582931A (en) * | 2019-09-29 | 2021-03-30 | 河南森源电气股份有限公司 | Chassis car, handcart-type circuit breaker and cubical switchboard |
-
2013
- 2013-08-09 CN CN201320488171.4U patent/CN203445024U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104465162A (en) * | 2014-12-24 | 2015-03-25 | 国家电网公司 | Electric load disconnection earthing knife-switch interlocking device |
| CN104465162B (en) * | 2014-12-24 | 2017-01-18 | 国家电网公司 | Electric load disconnection earthing knife-switch interlocking device |
| CN112582931A (en) * | 2019-09-29 | 2021-03-30 | 河南森源电气股份有限公司 | Chassis car, handcart-type circuit breaker and cubical switchboard |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |