CN114109153B - Locking device is prevented to intelligent high tension switchgear - Google Patents
Locking device is prevented to intelligent high tension switchgear Download PDFInfo
- Publication number
- CN114109153B CN114109153B CN202111247491.6A CN202111247491A CN114109153B CN 114109153 B CN114109153 B CN 114109153B CN 202111247491 A CN202111247491 A CN 202111247491A CN 114109153 B CN114109153 B CN 114109153B
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- panel
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- locking
- locking device
- lock
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B65/00—Locks or fastenings for special use
- E05B65/52—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like
- E05B65/5207—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement
- E05B65/5215—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement sliding
- E05B65/523—Other locks for chests, boxes, trunks, baskets, travelling bags, or the like characterised by bolt movement sliding parallel to the surface on which the lock is mounted
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
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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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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
- E05B2047/0067—Monitoring
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Patch Boards (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses an intelligent anti-locking device of a high-voltage switch cabinet, which comprises a cabinet body and a cabinet door, wherein the cabinet door comprises an anti-locking panel and a connecting panel arranged around the anti-locking panel in a surrounding manner, one side of the connecting panel is rotatably connected with the cabinet body, the other side of the connecting panel is provided with a cabinet door lock used for being connected with the cabinet body, one side of the anti-locking panel is rotatably connected with the connecting panel, and the other side of the anti-locking panel is connected with the connecting panel through an auxiliary connecting device. The auxiliary connecting device can be locked through the locking device, the anti-locking panel is prevented from being automatically opened due to misoperation of the auxiliary connecting device, when the door lock of the switch cabinet is dead, the locking device is unlocked, the auxiliary connecting device is opened, the anti-locking panel is opened to carry out operations such as door lock maintenance or electrical maintenance, and the situation that the operation of electrical equipment cannot be carried out due to temporary finding of the dead door lock of the switch cabinet is avoided.
Description
Technical Field
The invention relates to the field of switch cabinets, in particular to an intelligent anti-locking device for a high-voltage switch cabinet.
Background
The switch cabinet is an electrical device, the exterior line of the switch cabinet firstly enters a main control switch in the cabinet and then enters a branch control switch, and each branch is arranged according to the requirement. Such as meters, automatic controls, magnetic switches of motors, various alternating current contactors, and the like, some of which are also provided with high-voltage chambers and low-voltage chamber switch cabinets, and high-voltage buses, such as power plants, and some of which are also provided with low-frequency load shedding for keeping main equipment.
The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The components in the switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. The classification methods of the switch cabinets are various, for example, the switch cabinets can be divided into movable switch cabinets and fixed switch cabinets by the installation mode of the circuit breaker; or according to different cabinet body structures, the cabinet body can be divided into an open type switch cabinet, a metal closed switch cabinet and a metal closed armored switch cabinet; the high-voltage switch cabinet, the medium-voltage switch cabinet, the low-voltage switch cabinet and the like can be divided according to different voltage grades. The method is mainly suitable for various occasions such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industrial textile, industrial and mining enterprises, residential districts, high-rise buildings and the like. Cubical switchboard need lock the cabinet door at the on state, prevents that the cabinet door from opening the emergence electric leakage accident, leads to the cubical switchboard to be in the state of closing the cabinet and using for a long time, appears cabinet door lock corrosion easily and locks the dead condition even, and present cubical switchboard lacks the device to cabinet door corrosion lock is dead.
Like chinese patent CN214255402U, open day 2021 year 9 month 21 day, a high voltage load switch handcart and be equipped with high tension switchgear of this handcart, the intelligent cabinet temperature adjusting device comprises a cabinet body, the inside of the cabinet body is equipped with the room of receiving the car, and the inside fixed mounting who receives the room has the slide, the top fixed mounting of slide has high voltage circuit breaker, the below of receiving the room is equipped with the support room, and the inside of support room is equipped with the support frame, the bottom of support frame is rotated and is installed the walking wheel, and the inside fixed mounting of support frame has the balladeur train. It is provided with instrument room and panel board cooperation, shows the state when using the cubical switchboard, but it has the cabinet of closing for a long time and uses the dead problem of cabinet door lock that appears easily, lacks the dead corresponding device of lock to cabinet door corrosion.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: present cubical switchboard exists and closes the cabinet and use for a long time and appear cabinet door lock corrosion even lock extremely easily, leads to the unable technical problem who opens of cabinet door. The intelligent high-voltage switch cabinet anti-locking device can be used for opening a cabinet door after the cabinet door lock of a switch cabinet is dead.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides an intelligent high tension switchgear anti-lock device, includes the cabinet body and cabinet door, the cabinet door is in including anti-lock panel and encircleing the setting the connection panel around the anti-lock panel, one side of connection panel with the cabinet body rotates to be connected, connection panel's opposite side be equipped with be used for with cabinet body coupling's cabinet door lock, one side of anti-lock panel with connection panel rotates to be connected, anti-lock panel's opposite side with connection panel passes through supplementary connecting device and connects. The utility model provides an intelligent high tension switchgear anti-lock device, the intelligent high tension switchgear anti-lock device comprises a cabinet body and a cabinet door, the cabinet door sets up to anti-lock dead panel and sets up the connection panel two parts at four edges of anti-lock dead panel, connection panel passes through cabinet lock and cabinet body coupling, realize cabinet door switch function, anti-lock dead panel one side is rotated with connection panel and is connected, anti-lock dead panel opposite side is fixed with connection panel through a plurality of supplementary connecting device, when the cubical switchboard cabinet lock is dead, can open supplementary connecting device, open anti-lock dead panel and carry out operations such as lock maintenance or electrical maintenance, avoid appearing discovering the cubical switchboard cabinet lock temporarily and die the condition that leads to in time carrying out the electrical equipment operation.
As preferred, supplementary connecting device includes first stationary blade, second stationary blade, spliced pole and is used for removing the slewing mechanism of spliced pole, first stationary blade with anti-lock panel fixed connection, the second stationary blade with connected panel fixed connection, first stationary blade with the second stationary blade all is equipped with the confession the connecting hole that the spliced pole passed. The first fixing piece is fixed on the anti-lock panel, the second fixing piece is fixed on the connecting panel, the two fixing pieces are respectively positioned on two sides of the contact position of the anti-lock panel and the connecting panel, the auxiliary connecting device penetrates through connecting holes of the two fixing pieces through the rotating mechanism moving connecting column, and then the anti-lock panel is fixed with the connecting panel.
Preferably, the rotating mechanism comprises a rotating part, the rotating part is connected with the connecting column through a rotating gear, and a corresponding connecting tooth groove is formed in one side, close to the rotating gear, of the connecting column. The rotating part can be connected with a control system of the switch cabinet, and the rotating mode of the rotating part can be controlled by additionally arranging a rotating control switch on a cabinet door or a switch cabinet control panel.
Preferably, the device further comprises a locking device, the locking device comprises a moving part, the moving part is connected with the anti-locking panel through a sliding rail, and the moving part is provided with a moving hole for the connecting column to penetrate through.
The moving part can be connected with a control system of the switch cabinet, and the operation of the moving part can be controlled by additionally arranging a corresponding control switch on a cabinet door or a switch cabinet control panel. When slewing mechanism promotes the spliced pole and passes first stationary blade, second stationary blade and removal portion, the control removal portion reciprocates and pushes away the spliced pole from slewing mechanism's transmitting gear, fixes the spliced pole between first stationary blade and second stationary blade, prevents that slewing mechanism maloperation from rotating the spliced pole and opening the anti-lock panel, plays the effect of locking protection.
Preferably, the connecting panel is provided with a limiting piece, and the limiting piece is positioned on one side, away from the first fixing piece, of the second fixing piece. The spacing piece can set up the sensor and carry out the contact feedback, stops advancing when the spliced pole contact spacing piece.
Preferably, one side of the connecting column, which is far away from the rotating gear, is provided with two fixing grooves for fixing the auxiliary locking device. Two fixed slots of spliced pole correspond the position of first stationary blade and second stationary blade respectively, and when pushing away the spliced pole spacing piece department, locking device shifts up, drives the spliced pole rebound and breaks away from slewing mechanism to the spliced pole shifts up in making first stationary blade and second stationary blade card advance the fixed slot that corresponds, further strengthens the locking effect.
Preferably, the device further comprises a detection device, the detection device comprises an electrified detection unit for detecting the connection state of the switch cabinet and a door lock detection unit for detecting the use state of a cabinet door lock, and the electrified detection unit and the door lock detection unit are both connected with the locking device. The switch-on detection unit can be connected with the control system of the switch cabinet, receives the switch cabinet connection state of the control system, and when equipment is powered on in the switch cabinet, namely a handcart is in an operating position, the switch-on detection unit controls the locking device to be locked, so that the anti-lock panel cannot be opened, and the door lock detection unit can detect whether a correct door lock key exists in a cabinet door lock key hole, so that the anti-lock panel is prevented from being opened by misoperation when the connection panel can be normally opened.
Preferably, the connecting hole is funnel-shaped, and the diameter of the opening of one side of the connecting hole, which is far away from the limiting sheet, is larger than the diameter of the opening of the other side of the connecting hole. The connecting hole on the fixing piece is funnel-shaped, the diameter of an opening at one end, away from the limiting piece, of the connecting hole is larger, the connecting hole is conveniently aligned when the connecting column is pushed, and an auxiliary guiding effect is achieved.
Preferably, one end of the connecting column, which is close to the limiting sheet, is provided with a buffer part. The contact end of the connecting column and the limiting sheet, namely one end of the connecting column close to the limiting sheet, is provided with a buffer part, so that the connecting column is prevented from being worn when in contact with the limiting sheet.
The substantial effects of the invention are as follows: the anti-lock panel comprises an anti-lock panel and connecting panels arranged at four edges of the anti-lock panel, wherein the connecting panels are connected with a cabinet body through a cabinet door lock, so that a cabinet door opening and closing function is realized, one side of the anti-lock panel is rotatably connected with the connecting panels, and the other side of the anti-lock panel is fixed with the connecting panels through an auxiliary connecting device.
Drawings
Fig. 1 is a schematic structural diagram of a switch cabinet according to the embodiment;
fig. 2 is a schematic structural diagram of the cabinet body in the embodiment;
FIG. 3 is a schematic view of the anti-lock apparatus of the present embodiment;
fig. 4 is a schematic structural view of the locking device of the present embodiment after locking.
Wherein: 1. the cabinet body, 2, prevent dead panel of lock, 3, connection panel, 4, generating line room, 5, circuit breaker room, 6, cable chamber, 7, low-pressure chamber, 8, slewing mechanism, 9, running gear, 10, spliced pole, 11, fixed slot, 12, first stationary blade, 13, locking device, 14, second stationary blade, 15, spacing piece, 16, connecting hole.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
An anti-locking device of an intelligent high-voltage switch cabinet is shown in figures 1 and 2 and comprises a cabinet body 1 and a cabinet door, wherein a bus chamber 4, a circuit breaker chamber 5, a cable chamber 6 and a low-voltage chamber 7 are arranged in the cabinet body 1. The switch cabinet door is positioned on one side of the cabinet body 1 where the breaker chamber 5 and the low-voltage chamber 7 are positioned. The cabinet door includes that panel 2 is died in the anti-lock and encircles connection panel 3 that sets up around panel 2 is died in the anti-lock, and connection panel 3 is the loop configuration promptly, and one side and the cabinet body 1 of connection panel 3 rotate to be connected, and connection panel 3's opposite side is equipped with and is used for the cabinet lock of being connected with the cabinet body 1, and one side and the connection panel 3 of panel 2 are died in the anti-lock rotate to be connected, and panel 2's opposite side and connection panel 3 are died in the anti-lock are connected through supplementary connecting device.
The auxiliary connecting device comprises a first fixing sheet 12, a second fixing sheet 14, a connecting column 10 and a rotating mechanism 8 for moving the connecting column 10, as shown in fig. 3 and 4, the first fixing sheet 12 is fixedly connected with the anti-locking panel 2, the second fixing sheet 14 is fixedly connected with the connecting panel 3, and the first fixing sheet 12 and the second fixing sheet 14 are both provided with connecting holes 16 for the connecting column 10 to pass through. First stationary blade 12 is fixed on anti-lock panel 2, and second stationary blade 14 is fixed on connection panel 3, and two stationary blades are located the both sides of anti-lock panel 2 and connection panel 3 contact department respectively, and supplementary connecting device passes the connecting hole 16 of two stationary blades through 8 removal spliced poles 10 of slewing mechanism, and then fixes anti-lock panel 2 and connection panel 3. The rotating mechanism 8 comprises a rotating part, the rotating part is connected with a connecting column 10 through a rotating gear 9, and one side of the connecting column 10, which is close to the rotating gear 9, is provided with a corresponding connecting tooth groove. The rotating part can be connected with a control system of the switch cabinet, and the rotating mode of the rotating part can be controlled by additionally arranging a rotating control switch on a cabinet door or a switch cabinet control panel.
The connecting panel 3 is provided with a limiting sheet 15, and the limiting sheet 15 is located on one side of the second fixing sheet 14 far away from the first fixing sheet 12. The spacing piece 15 can be provided with a sensor for contact feedback, and the connecting column 10 stops propelling when contacting the spacing piece 15. The connecting hole 16 is funnel-shaped, and the diameter of the opening of one side of the connecting hole 16 far away from the limiting sheet 15 is larger than that of the opening of the other side of the connecting hole 16. The connecting hole 16 on the fixing piece is funnel-shaped, and the opening diameter of the end, far away from the limiting piece 15, of the connecting hole 16 is larger, so that the connecting column 10 can be conveniently aligned to the connecting hole 16 when being pushed, and an auxiliary guiding effect is achieved.
The side of the connecting column 10 remote from the rotary gear 9 is provided with two fixing grooves 11 for fixing an auxiliary locking device 13. Two fixed slots 11 of spliced pole 10 correspond the position of first stationary blade 12 and second stationary blade 14 respectively, and when pushing away spliced pole 10 spacing piece 15 department, locking device 13 moves up, drives spliced pole 10 rebound and breaks away from slewing mechanism 8 to in spliced pole 10 shifts up the fixed slot 11 that makes first stationary blade 12 and second stationary blade 14 card advance to correspond, further strengthen the locking effect. One end of the connecting column 10 close to the limiting sheet 15 is provided with a buffer part. The contact end of the connecting column 10 and the limiting sheet 15, namely, the end of the connecting column 10 close to the limiting sheet 15, is provided with a buffer part to prevent the connecting column 10 from being worn when in contact with the limiting sheet 15.
The embodiment further comprises a locking device 13, wherein the locking device 13 comprises a moving part, the moving part is connected with the anti-lock panel 2 through a sliding rail, and the moving part is provided with a moving hole for the connecting column 10 to pass through. The moving part can be connected with a control system of the switch cabinet, and the operation of the moving part can be controlled by additionally arranging a corresponding control switch on a cabinet door or a switch cabinet control panel. When the slewing mechanism 8 promotes the spliced pole 10 and passes first stationary blade 12, second stationary blade 14 and removal portion, the control removal portion reciprocates and pushes away spliced pole 10 from slewing mechanism 8's rotating gear 9, fixes spliced pole 10 between first stationary blade 12 and second stationary blade 14, prevents that 8 maloperation of slewing mechanism from rotating spliced pole 10 and opening anti-lock panel 2, plays the effect of locking protection.
The embodiment further comprises a detection device, the detection device comprises an electrifying detection unit and a door lock detection unit, the electrifying detection unit is used for detecting the connection state of the switch cabinet, the door lock detection unit is used for detecting the use state of the cabinet door lock, and the electrifying detection unit and the door lock detection unit are both connected with the locking device 13. The switch-on detection unit can be connected with the control system of the switch cabinet, receives the switch cabinet connection state of the control system, and when equipment is powered on in the switch cabinet, namely a handcart is in an operating position, the switch-on detection unit controls the locking device 13 to be locked, the anti-locking panel 2 cannot be opened, whether a correct door lock key exists in a door lock key hole or not can be detected by the door lock detection unit, and the anti-locking panel 2 is prevented from being opened by misoperation when the connection panel 3 can be normally opened.
This embodiment includes the cabinet body 1 and cabinet door, the cabinet door sets up to the dead panel of anti-lock 2 and sets up the 3 two parts of connection panel at the dead panel of anti-lock 2 four edges, connection panel 3 is connected with the cabinet body 1 through the cabinet lock, realize cabinet door switch function, 2 one side of the dead panel of anti-lock rotates with connection panel 3 to be connected, 2 opposite sides of the dead panel of anti-lock are fixed with connection panel 3 through supplementary connecting device, when the cubical switchboard cabinet lock is dead, can open supplementary connecting device, open the dead panel of anti-lock 2 and carry out operations such as lock maintenance or electrical maintenance, this embodiment can open the dead panel of anti-lock 2 on the cabinet door after the cubical switchboard cabinet lock dies, avoid appearing discovering the cubical switchboard cabinet lock and dying the condition that leads to in time carrying out the electrical equipment operation temporarily.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. The intelligent anti-locking device of the high-voltage switch cabinet is characterized by comprising a cabinet body (1) and a cabinet door, wherein the cabinet door comprises an anti-locking panel (2) and a connecting panel (3) arranged around the anti-locking panel (2) in a surrounding mode, one side of the connecting panel (3) is rotatably connected with the cabinet body (1), a cabinet door lock used for being connected with the cabinet body (1) is arranged on the other side of the connecting panel (3), one side of the anti-locking panel (2) is rotatably connected with the connecting panel (3), and the other side of the anti-locking panel (2) is connected with the connecting panel (3) through an auxiliary connecting device;
the auxiliary connecting device comprises a first fixing piece (12), a second fixing piece (14), a connecting column (10) and a rotating mechanism (8) used for moving the connecting column (10), wherein the first fixing piece (12) is fixedly connected with the anti-locking panel (2), the second fixing piece (14) is fixedly connected with the connecting panel (3), and the first fixing piece (12) and the second fixing piece (14) are both provided with connecting holes (16) for the connecting column (10) to pass through;
the rotating mechanism (8) comprises a rotating part, the rotating part is connected with the connecting column (10) through a rotating gear (9), and a corresponding connecting tooth groove is formed in one side, close to the rotating gear (9), of the connecting column (10);
the anti-locking device is characterized by further comprising a locking device (13), wherein the locking device (13) comprises a moving part, the moving part is connected with the anti-locking panel (2) through a sliding rail, and the moving part is provided with a moving hole for the connecting column (10) to penetrate through;
and one side of the connecting column (10) far away from the rotating gear (9) is provided with two fixing grooves (11) for fixing an auxiliary locking device (13).
2. The intelligent anti-locking device for the high-voltage switch cabinet as claimed in claim 1, wherein a limiting piece (15) is arranged on the connecting panel (3), and the limiting piece (15) is located on one side of the second fixing piece (14) far away from the first fixing piece (12).
3. The intelligent high-voltage switch cabinet anti-locking device according to claim 1, further comprising a detection device, wherein the detection device comprises an energization detection unit for detecting the connection state of the switch cabinet and a door lock detection unit for detecting the use state of a cabinet door lock, and both the energization detection unit and the door lock detection unit are connected with the locking device (13).
4. The intelligent high-voltage switch cabinet anti-locking device as claimed in claim 2, wherein the connecting hole (16) is funnel-shaped, and the diameter of the opening of one side of the connecting hole (16) far away from the limiting sheet (15) is larger than the diameter of the opening of the other side of the connecting hole (16).
5. The intelligent anti-locking device for the high-voltage switch cabinet as claimed in claim 4, wherein a buffer part is arranged at one end of the connecting column (10) close to the limiting sheet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111247491.6A CN114109153B (en) | 2021-10-26 | 2021-10-26 | Locking device is prevented to intelligent high tension switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111247491.6A CN114109153B (en) | 2021-10-26 | 2021-10-26 | Locking device is prevented to intelligent high tension switchgear |
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| Publication Number | Publication Date |
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| CN114109153A CN114109153A (en) | 2022-03-01 |
| CN114109153B true CN114109153B (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111247491.6A Active CN114109153B (en) | 2021-10-26 | 2021-10-26 | Locking device is prevented to intelligent high tension switchgear |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202009172U (en) * | 2011-04-11 | 2011-10-12 | 浙江临高电气实业有限公司 | High-voltage switch cabinet door with emergency operating door |
| CN103132808A (en) * | 2013-03-15 | 2013-06-05 | 宁波永发集团有限公司 | Box door locking structure |
| CN106887796A (en) * | 2017-02-21 | 2017-06-23 | 国网山东省电力公司邹城市供电公司 | Safety switch cabinet |
| CN207485131U (en) * | 2017-07-11 | 2018-06-12 | 建投物联（江西）股份有限公司 | A kind of electronic lock with direction recognition device based on NBIOT communications |
| CN211776999U (en) * | 2020-03-11 | 2020-10-27 | 山东省产品质量检验研究院 | Multifunctional fire door |
-
2021
- 2021-10-26 CN CN202111247491.6A patent/CN114109153B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202009172U (en) * | 2011-04-11 | 2011-10-12 | 浙江临高电气实业有限公司 | High-voltage switch cabinet door with emergency operating door |
| CN103132808A (en) * | 2013-03-15 | 2013-06-05 | 宁波永发集团有限公司 | Box door locking structure |
| CN106887796A (en) * | 2017-02-21 | 2017-06-23 | 国网山东省电力公司邹城市供电公司 | Safety switch cabinet |
| CN207485131U (en) * | 2017-07-11 | 2018-06-12 | 建投物联（江西）股份有限公司 | A kind of electronic lock with direction recognition device based on NBIOT communications |
| CN211776999U (en) * | 2020-03-11 | 2020-10-27 | 山东省产品质量检验研究院 | Multifunctional fire door |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114109153A (en) | 2022-03-01 |
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