CN114221230A - Safety protection type switch board - Google Patents
Safety protection type switch board Download PDFInfo
- Publication number
- CN114221230A CN114221230A CN202111650560.8A CN202111650560A CN114221230A CN 114221230 A CN114221230 A CN 114221230A CN 202111650560 A CN202111650560 A CN 202111650560A CN 114221230 A CN114221230 A CN 114221230A
- Authority
- CN
- China
- Prior art keywords
- cabinet door
- cabinet
- lock
- lock cylinder
- key
- Prior art date
- 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.)
- Pending
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Classifications
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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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/38—Hinged covers or doors
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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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
Abstract
A safety protection type power distribution cabinet effectively solves the problem of potential safety hazard after the power distribution cabinet is opened accidentally; the cabinet comprises a cabinet body, wherein one side of the front end of the cabinet body is hinged with a cabinet door, the cabinet door comprises a first cabinet door and a second cabinet door, the inner side of the first cabinet door is provided with a lining plate, the first cabinet door and the lining plate are detachably connected, the cabinet body is provided with a plurality of push plates, two sides of the cabinet body are provided with lock grooves, the lining plate is provided with a first lock pin matched with the lock grooves, one side of the lining plate, facing the first cabinet door, is provided with a fixed groove, a fixed block matched with the fixed groove is arranged in the first cabinet door in a telescopic mode, a first lock body is arranged in the first cabinet door and can control the telescopic motion of the first lock pin on the lining plate and the telescopic motion of the fixed block on the first cabinet door, the front end of the first cabinet door is provided with a lock hole, and a second lock body matched with the lock hole is arranged in the second cabinet door; the power distribution cabinet is simple in structure and convenient to use, and the power distribution cabinet can automatically cut off the power inside the power distribution cabinet after being opened accidentally, so that safety accidents are avoided, and the safety of surrounding people is guaranteed.
Description
Technical Field
The invention relates to the technical field of power distribution cabinets, in particular to a safety protection type power distribution cabinet.
Background
Outdoor switch board in use may have some not send out the condition that the molecule wants to steal switch board internal component, and lawless persons can select to demolish the cabinet door with the mode of violently destroying the cabinet door to make inside components and parts expose in the air, have very big potential safety hazard, consequently, we need improve the switch board, make it can realize the auto-power-off when being opened by accident, thereby play safety protection's effect.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a safety protection type power distribution cabinet, which effectively solves the problem of potential safety hazard after the power distribution cabinet is opened accidentally.
The technical scheme for solving the technical problem is as follows: the utility model provides a safety protection type switch board, the intelligent cabinet temperature adjusting device comprises a cabinet body, cabinet body front end one side articulates there is the cabinet door, the cabinet door includes with cabinet body articulated first cabinet door and articulate the second cabinet door in the first cabinet door outside, first cabinet door inboard is equipped with the welt with cabinet body coupling, first cabinet door and welt can be dismantled and be connected, be equipped with a plurality of push pedals with the welt contact on the cabinet body, cabinet body both sides are equipped with the locked groove, be equipped with on the welt with the first lockpin of locked groove complex, the welt is equipped with the fixed slot towards first cabinet door one side, stretch out and draw back in the first cabinet door be provided with fixed slot complex fixed block, first cabinet door inside is equipped with first lock, first lock can enough control the flexible and the fixed block of first lockpin on the welt on first cabinet door, first cabinet door front end is equipped with the lockhole, be equipped with in the second cabinet door with lockhole complex second lock.
Preferably, a plurality of push pedal flexible setting around in the inner wall front side of the cabinet body, the internal first spring that promotes the push pedal to the front side that is equipped with of cabinet, the internal contact switch that is located the push pedal front side that is equipped with of cabinet, the contact switch electricity is connected the circuit breaker, a plurality of circuit breaker and the transformer and the protector that opens circuit on the thread establish ties.
Preferably, first lockpin set up at the welt side, first lockpin inner rotate be equipped with welt threaded connection's screw shaft, screw shaft tip is equipped with first connecting plate, be equipped with in the first cabinet door and rotate the pivot of setting on the fixed block, the pivot tip is equipped with the second connecting plate of being connected with first connecting plate cooperation, be fixed with wide gear in the pivot, the pivot tip is equipped with the second spring, the second spring promotes the pivot to the direction that is close to the welt, the first connecting plate drives the flexible of the first lockpin of screw shaft rotation control with the second connecting plate contact back pivot.
Preferably, the first lock body comprises a first lock cylinder rotatably arranged at the front side of the first cabinet door and a second lock cylinder rotatable in the first cabinet door, and the first lock cylinder and the second lock cylinder are coaxial.
Preferably, a first gear is coaxially fixed on the inner side of the first lock core, the first gear is meshed with a rack which horizontally moves in the first cabinet door, a shifting lever which is sleeved on the rotating shaft is fixed at the end of the rack, and the first lock core is rotated to control the rotating shaft to move in the first cabinet door so as to control the fixed block to stretch.
Preferably, the back side of the second lock cylinder is a bevel gear, the bevel gear is in transmission connection with a second gear meshed with the wide gear, the second lock cylinder drives the rotating shaft to rotate, and the first lock pin is controlled to stretch and retract when the first connecting plate is matched with the second connecting plate.
Preferably, a gap is reserved between the first gear and the second lock cylinder of the first lock cylinder, a plurality of connecting holes are formed in the back side of the first gear, the key comprises a key rod, a key plate is arranged at the inner end of the key rod, a connecting rod matched with the connecting holes is arranged on the key plate, through holes with the same cross section as that of the key plate are formed in the first lock cylinder and the second lock cylinder, and the key can drive the second gear to rotate when the key plate is inserted into the through hole of the second lock cylinder so as to control the first lock pin to stretch; the key plate is inserted between the first gear and the second lock cylinder, the key rod is rotated to pull the key plate outwards to enable the connecting rod to be inserted into the connecting hole, the key is rotated to drive the first gear to rotate so as to control the expansion of the fixing block, at the moment, the key plate is separated from the second lock cylinder, and the first lock pin is kept still.
The power distribution cabinet is simple in structure and convenient to use, and the power distribution cabinet can automatically cut off the power inside the power distribution cabinet after being opened accidentally, so that safety accidents are avoided, and the safety of surrounding people is guaranteed.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the cabinet body in the invention.
Fig. 3 is a schematic sectional view of the cabinet in the top view direction.
Fig. 4 is a schematic view of a back side structure of the first cabinet door of the present invention.
Fig. 5 is a schematic sectional view of the back side structure of the first cabinet door according to the present invention.
Fig. 6 is a schematic sectional view of a top view of the first door of the present invention.
Fig. 7 is a schematic cross-sectional side view of the first door of the present invention.
Fig. 8 is a schematic structural diagram of the second cabinet door according to the present invention.
Fig. 9 is a schematic view of the structure of the key of the present invention.
Fig. 10 is an enlarged view of the structure at a in fig. 6 according to the present invention.
Fig. 11 is an enlarged view of the structure at B in fig. 10 according to the present invention.
Fig. 12 is a schematic diagram of the connection of the disconnection switch of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As can be seen from fig. 1 to 12, a safety protection type power distribution cabinet comprises a cabinet body 1, a cabinet door is hinged on one side of the front end of the cabinet body 1, the cabinet door comprises a first cabinet door 2 hinged with the cabinet body 1 and a second cabinet door 3 hinged on the outer side of the first cabinet door 2, a lining plate 4 connected with the cabinet body 1 is arranged on the inner side of the first cabinet door 2, the first cabinet door 2 is detachably connected with the lining plate 4, a plurality of push plates 5 contacted with the lining plate 4 are arranged on the cabinet body 1, locking grooves 6 are arranged on two sides of the cabinet body 1, a first lock pin 7 matched with the locking groove 6 is arranged on the lining plate 4, a fixing groove 8 is arranged on one side of the lining plate 4 facing the first cabinet door 2, a fixing block 9 matched with the fixing groove 8 is arranged in the first cabinet door 2 in a telescopic manner, a first lock body 10 is arranged inside the first cabinet door 2, the first lock body 10 can control the extension of the first lock pin 7 on the lining plate 4 and the extension of the fixing block 9 on the first cabinet door 2, a lock hole is arranged on the front end of the first cabinet door 2, a second lock body 11 matched with the lock hole is arranged in the second cabinet door 3.
When the invention is used, the water-saving agent is added,
regional transparent material in the middle part of first cabinet door 2, observe to switch board inside and examine time measuring, open second cabinet door 3, just can the internal conditions of direct observation switch board through first cabinet door 2, inside isolated staff of first cabinet door 2 and the switch board, can avoid the dangerous emergence of staff's electric shock, welt 4 in the first cabinet door 2 is relevant with switch board internal line, when opening welt 4 and first cabinet door 2 from 1 front end of the cabinet body simultaneously, 5 antedisplacement in push pedal, the inside outage of switch board, can overhaul the maintenance to switch board inside this moment, uncharged operation is safe and reliable more, can avoid the accident again to open and take place to electrocute danger behind first cabinet door 2.
Under normal use condition, first cabinet door 2 and second cabinet door 3 all are in the closed condition, switch board internal seal, when the staff observes the internal conditions, can open second cabinet door 3, observe the internal conditions of switch board through the transparent material of first cabinet door 2, if need carry out electrified when overhauing, can break away from first cabinet door 2 and welt 4 and connect, open first cabinet door 2 and leave welt 4 on the cabinet body 1, the switch board is inside still electrified this moment, the staff can carry out hot-line work, if need carry out uncharged when overhauing, open welt 4 and first cabinet door 2 from cabinet body 1 front end simultaneously, the inside outage operation of accomplishing of switch board this moment, can overhaul and maintain.
When non-staff wanted to steal the action such as the switch board, because its key that does not open the cabinet door, also do not know the method that the cabinet door was opened, the general probability can adopt the mode that the cabinet door was demolishd to the violence, can lead to welt 4 to leave from 1 front end of the cabinet body simultaneously along with first cabinet door 2 like this, and push pedal 5 of this department can remove like this, leads to the inside outage of switch board, avoids producing because of the incident that the illegal action takes place.
For realizing that push pedal 5 removes the back outage, flexible setting is in the inner wall front side of the cabinet body 1 around a plurality of push pedals 5, be equipped with the first spring 12 that pushes away push pedal 5 to the front side in the cabinet body 1, be equipped with the contact switch 13 that is located push pedal 5 front side in the cabinet body 1, contact switch 13 electricity is connected circuit breaker, a plurality of circuit breaker establish ties with the circuit breaker on transformer and the thread, install first cabinet door 2 back, welt 4 promotes push pedal 5 inward movement, compress first spring 12, contact switch 13 is kept away from to push pedal 5 inboard, the main line route, when welt 4 leaves from cabinet body 1 front end, push pedal 5 antedisplacement under the effect of first spring 12, push pedal 5 contacts contact switch 13, circuit breaker breaks, make the main line break, the switch board is no longer electrified.
For realizing the fixed connection of welt 4 and the cabinet body 1, first fitting pin 7 sets up at welt 4 side, first fitting pin 7 inner rotates and is equipped with the screw 14 with welt 4 threaded connection, 14 tip of screw are equipped with first connecting plate 15, be equipped with in the first cabinet door 2 and rotate the pivot 16 that sets up on fixed block 9, 16 tip of pivot is equipped with the second connecting plate 17 of being connected with 15 cooperation of first connecting plate, be fixed with wide gear 18 in the pivot 16, 16 tip of pivot is equipped with second spring 19, second spring 19 promotes pivot 16 to the direction that is close to welt 4, pivot 16 drives screw 14 rotation control first fitting pin 7's flexible after first connecting plate 15 and the contact of second connecting plate 17.
The screw shaft 14 rotates to control the position of the first lock pin 7, and under the condition of no external force, the second spring 19 pushes the rotating shaft 16 to enable the second connecting plate 17 to be in contact with the first connecting plate 15 to form fit, and at the moment, the rotating shaft 16 rotates to control the first lock pin 7 to stretch on the lining plate 4.
In order to realize the control of the rotating shaft 16, the first lock body 10 comprises a first lock core 20 and a second lock core 21, the first lock core 20 is rotatably arranged on the front side of the first cabinet door 2, the second lock core 21 is rotatably arranged inside the first cabinet door 2, the first lock core 20 and the second lock core 21 are coaxial, a first gear 22 is coaxially fixed on the inner side of the first lock core 20, the first gear 22 is meshed with a rack 23 which horizontally moves in the first cabinet door 2, a shifting lever 24 which is sleeved on the rotating shaft 16 is fixedly arranged at the end part of the rack 23, the first lock core 20 is rotated to control the rotating shaft 16 to move in the first cabinet door 2 so as to control the expansion and contraction of the fixed block 9, the back side of the second lock core 21 is provided with a bevel gear, the bevel gear is in transmission connection with a second gear 25 which is meshed with the wide gear 18, the second lock core 21 drives the rotating shaft 16 to rotate, and the expansion and contraction of the first lock pin 7 is controlled when the first connecting plate 15 is matched with the second connecting plate 17.
Rotate first lock core 20 and can drive rack 23 and remove, driving lever 24 stirs pivot 16 and makes fixed block 9 break away from in the fixed slot 8 to make and break away from the connection between first cabinet door 2 and the welt 4, can stay welt 4 on the cabinet body 1 and open first cabinet door 2 this moment, because push pedal 5 positions do not move, contact switch 13 is not triggered, the inside electrified state that is of switch board, the staff can carry out live operation to the switch board this moment.
Rotate second lock core 21, drive wide gear 18 after the transmission and rotate for 16 rotations of pivot drive screw 14 rotate, thereby retract first lockpin 7 inside welt 4, make welt 4 break away from the cabinet body 1, push pedal 5 position removal this moment, contact switch 13 is triggered, thereby leads to the inside outage of switch board, and the staff can carry out the uncharged operation to the switch board this moment.
When the first lock pin 7 is controlled to move, the first lock cylinder 20 cannot rotate, the shift lever 24 does not move, the rotating shaft 16 pushes the rotating shaft 16 and the screw shaft 14 to be always in a connected state under the action of the second spring 19, and therefore, the second lock cylinder 21 is rotated to control the movement of the first lock pin 7.
In order to realize the separate control of the first lock pin 7 and the second lock pin 21, a gap is left between the first gear 22 and the second lock pin 21 of the first lock pin 20, a plurality of connecting holes 26 are arranged at the back side of the first gear 22, the key comprises a key rod 27, a key plate 28 is arranged at the inner end of the key rod 27, a connecting rod 29 matched with the connecting holes 26 is arranged on the key plate 28, through holes with the same section as the key plate 28 are arranged on the first lock pin 20 and the second lock pin 21, and the key can drive the second gear 25 to rotate when the key plate 28 is inserted into the through hole of the second lock pin 21 so as to control the extension and retraction of the first lock pin 7; the key plate 28 is inserted between the first gear 22 and the second lock cylinder 21, the key plate 28 is pulled outwards after the key rod 27 is rotated so that the connecting rod 29 is inserted into the connecting hole 26, the key is rotated to drive the first gear 22 to rotate so as to control the expansion and contraction of the fixed block 9, at the moment, the key plate 28 is separated from the second lock cylinder 21, and the first lock pin 7 is kept still.
The sum of the lengths of the key plate 28 and the connecting rod 29 is smaller than the width of the gap, the key plate 28 can rotate in the gap, when the first lock pin 7 needs to be operated, the key plate 28 is connected with the second lock cylinder 21, the second lock cylinder 21 is controlled to rotate, and then the lining plate 4 is controlled to be separated from the cabinet body 1; when the fixed block 9 needs to be operated, the key plate 28 is pulled back and then is linked with the first gear 22, so that the movement of the fixed block 9 in the first cabinet door 2 is controlled, and further the separation of the first cabinet door 2 and the lining plate 4 is controlled.
The first lock pins 7 located on both sides of the lining plate 4 are communicated through the transmission mechanisms located in the first cabinet door 2, so that the first lock pins synchronously move in opposite directions, and similarly, the fixed blocks 9 located on both sides of the first cabinet door 2 are in transmission connection through the transmission mechanisms, so that the first lock pins can synchronously move in opposite directions, and the transmission mechanisms are not described in detail herein, which is a conventional technical means for those skilled in the art.
Compared with the prior art, the invention has the following beneficial effects: the safety protection device has multiple safety protection functions, and can reduce the risk of electric shock accidents of non-working personnel; under the condition that the non-working personnel do not know the correct opening method of the cabinet door, after the power distribution cabinet is opened by using the key, the interior of the power distribution cabinet is powered off, so that the non-working personnel are prevented from being operated in a live mode, and safety accidents are avoided; when the working personnel use, first cabinet door, second cabinet door and welt have the multiple different method of opening, can adapt to the maintenance condition of multiple difference, improve its application range.
Claims (7)
1. A safety protection type power distribution cabinet is characterized by comprising a cabinet body (1), wherein one side of the front end of the cabinet body (1) is hinged with a cabinet door, the cabinet door comprises a first cabinet door (2) hinged with the cabinet body (1) and a second cabinet door (3) hinged with the outer side of the first cabinet door (2), a lining plate (4) connected with the cabinet body (1) is arranged on the inner side of the first cabinet door (2), the first cabinet door (2) is detachably connected with the lining plate (4), a plurality of push plates (5) contacted with the lining plate (4) are arranged on the cabinet body (1), locking grooves (6) are arranged on two sides of the cabinet body (1), first locking pins (7) matched with the locking grooves (6) are arranged on the lining plate (4), a fixing groove (8) is arranged on one side, facing the first cabinet door (2), a fixing block (9) matched with the fixing groove (8) is arranged in the first cabinet door (2) in a telescopic mode, a first lock body (10) is arranged inside the first cabinet door (2), first lock body (10) can control the flexible and fixed block (9) of first lockpin (7) on welt (4) and flexible on first cabinet door (2), and first cabinet door (2) front end is equipped with the lockhole, is equipped with in second cabinet door (3) with lockhole complex second lock body (11).
2. The safety protection type power distribution cabinet according to claim 1, wherein a plurality of said push plates (5) are telescopically arranged in front of and behind the inner wall of the cabinet body (1), a first spring (12) for pushing the push plates (5) to the front side is arranged in the cabinet body (1), a contact switch (13) positioned in front of the push plates (5) is arranged in the cabinet body (1), the contact switch (13) is electrically connected with a circuit breaker, and a plurality of circuit breakers are connected in series with the transformer and the circuit breaker on the main line.
3. The safety protection type power distribution cabinet according to claim 1, wherein the first lock pin (7) is arranged at the side of the lining plate (4), a screw shaft (14) in threaded connection with the lining plate (4) is rotatably arranged at the inner end of the first lock pin (7), a first connecting plate (15) is arranged at the end part of the screw shaft (14), a rotating shaft (16) rotatably arranged on the fixed block (9) is arranged in the first cabinet door (2), a second connecting plate (17) in matched connection with the first connecting plate (15) is arranged at the end part of the rotating shaft (16), a wide gear (18) is fixed on the rotating shaft (16), a second spring (19) is arranged at the end part of the rotating shaft (16), and the rotating shaft (16) is pushed by the second spring (19) towards the direction close to the lining plate (4), after the first connecting plate (15) is contacted with the second connecting plate (17), the rotating shaft (16) drives the screw shaft (14) to rotate to control the extension of the first lock pin (7).
4. A safety protection type distribution cabinet according to claim 1, characterized in that said first lock body (10) comprises a first lock cylinder (20) rotatably arranged at the front side of said first cabinet door (2) and a second lock cylinder (21) rotatably arranged inside said first cabinet door (2), said first lock cylinder (20) and said second lock cylinder (21) being coaxial.
5. The safety protection type power distribution cabinet according to claim 1, wherein a first gear (22) is coaxially fixed on the inner side of the first lock cylinder (20), the first gear (22) is engaged with a rack (23) which horizontally moves in the first cabinet door (2), a shifting lever (24) sleeved on the rotating shaft (16) is fixed at the end of the rack (23), and the first lock cylinder (20) is rotated to control the rotating shaft (16) to move in the first cabinet door (2) so as to control the extension and retraction of the fixed block (9).
6. The safety protection type power distribution cabinet according to claim 1, wherein the back side of the second lock cylinder (21) is a bevel gear, the bevel gear is in transmission connection with a second gear (25) meshed with the wide gear (18), the second lock cylinder (21) drives the rotating shaft (16) to rotate, and the first lock pin (7) is controlled to extend and retract when the first connecting plate (15) is matched with the second connecting plate (17).
7. The safety protection type power distribution cabinet according to claim 1, wherein a gap is reserved between the first gear (22) and the second lock cylinder (21) of the first lock cylinder (20), a plurality of connecting holes (26) are formed in the back side of the first gear (22), the key comprises a key rod (27), a key plate (28) is arranged at the inner end of the key rod (27), a connecting rod (29) matched with the connecting holes (26) is arranged on the key plate (28), through holes with the same cross section as that of the key plate (28) are formed in the first lock cylinder (20) and the second lock cylinder (21), and the key can drive the second gear (25) to rotate when the key plate (28) is inserted into the through hole of the second lock cylinder (21) so as to control the extension and retraction of the first lock pin (7); a key plate (28) is inserted between the first gear (22) and the second lock cylinder (21), the key plate (28) is pulled outwards after the key rod (27) is rotated so that the connecting rod (29) is inserted into the connecting hole (26), the first gear (22) is driven to rotate by the rotating key so as to control the expansion and contraction of the fixing block (9), at the moment, the key plate (28) is separated from the second lock cylinder (21), and the first lock pin (7) is kept still.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111650560.8A CN114221230A (en) | 2021-12-31 | 2021-12-31 | Safety protection type switch board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111650560.8A CN114221230A (en) | 2021-12-31 | 2021-12-31 | Safety protection type switch board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114221230A true CN114221230A (en) | 2022-03-22 |
Family
ID=80707205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111650560.8A Pending CN114221230A (en) | 2021-12-31 | 2021-12-31 | Safety protection type switch board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114221230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377851A (en) * | 2022-08-26 | 2022-11-22 | 华能陇东能源有限责任公司 | Equipment maintenance mistake-preventing structure |
-
2021
- 2021-12-31 CN CN202111650560.8A patent/CN114221230A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377851A (en) * | 2022-08-26 | 2022-11-22 | 华能陇东能源有限责任公司 | Equipment maintenance mistake-preventing structure |
| CN115377851B (en) * | 2022-08-26 | 2024-04-05 | 华能陇东能源有限责任公司 | Error-proof structure for equipment overhaul and maintenance |
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