CN208835484U - Interlock safety door on low-tension switch cabinet - Google Patents
Interlock safety door on low-tension switch cabinet Download PDFInfo
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- CN208835484U CN208835484U CN201821653220.4U CN201821653220U CN208835484U CN 208835484 U CN208835484 U CN 208835484U CN 201821653220 U CN201821653220 U CN 201821653220U CN 208835484 U CN208835484 U CN 208835484U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 60
- 230000000903 blocking effect Effects 0.000 claims abstract description 23
- 239000003381 stabilizer Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
Abstract
The utility model discloses the interlock safety doors on a kind of low-tension switch cabinet, belong to field of electrical equipment, when being intended to make the power supply in low-tension switch cabinet to disconnect, the cabinet door of low-tension switch cabinet could open, its key points of the technical solution are that including doorframe, door-plate is hinged on doorframe, start button is provided on door-plate, control switch is connected in start button, start button moves along own axes direction and realizes being switched on or switched off for control switch, one end that start button protrudes into doorframe is fixed with push rod, push rod is contradicted far from one end of start button transmission mechanism, blocking mechanism is connected on transmission mechanism, push rod moves twice along start button axis direction, push rod pushes transmission mechanism twice, transmission mechanism pushes blocking mechanism mobile primary, blocking mechanism end of door plate releases primary limitation.The problem of the utility model solves when ensuring that low-tension switch cabinet is opened, and low-tension switch cabinet interior power disconnects.
Description
Technical field
Interlock safety door the utility model relates to field of electrical equipment, in particular on a kind of low-tension switch cabinet.
Background technique
Common corollary equipment in electric system when low-tension switch cabinet, be widely used in power plant, petroleum, chemical industry, metallurgy,
The industries such as weaving, skyscraper are used as transmission of electricity, distribution and electric energy conversion.
Authorization Notice No. is that the Chinese utility model patent of CN204668738U discloses one kind with back door mechanical interlocking
The low-tension switch cabinet of protective device, including switch cabinet body, be equipped in switch cabinet body low-pressure chamber, breaker chamber, bus-bar room and
Cable vault, the switch cabinet body back side are equipped with rear sealing plate, and rear sealing plate is equipped with back door mechanical interlocking protective device, including after being threaded through
One shaft of sealing plate midpoint, shaft are located at rear sealing plate lateral surface one end connection rotating handles, and shaft is located at rear sealing plate medial surface
One rotation pulling-on piece of one end connection, the two sides of rear sealing plate medial surface are respectively arranged with the first fixing seat and the second fixing seat, and first is solid
It is provided with the first locking bar in reservation, the second locking bar is provided in the second fixing seat, lateral partitions, are additionally provided in switch cabinet body
One vertical baffle and the second vertical baffle.
The mechanical interlocking protective device that has a back door connection is installed on sealing plate after in above scheme, using pure mechanic structure, structure is simple,
Easy to operate, occupancy operating space is less, but the power supply being necessary to ensure that in switchgear when the unlatching of part low-tension switch cabinet is in disconnected
Open state, even and if existing low-tension switch cabinet switchgear interior power it is in the open state when, low-tension switch cabinet remains to open.
Utility model content
The purpose of this utility model is to provide the interlock safety doors on a kind of low-tension switch cabinet, have in low-tension switch cabinet
Power supply when disconnecting, the advantages of low-tension switch cabinet could be opened.
The above-mentioned technical purpose of the utility model has the technical scheme that on a kind of low-tension switch cabinet
Interlock safety door, including doorframe is hinged with door-plate on the doorframe, start button, the starting is provided on the door-plate
Control switch is connected on button, the start button moves along own axes direction and realizes being switched on or switched off for control switch,
One end that the start button protrudes into doorframe is fixed with push rod, and the push rod is contradicted far from one end of start button driver
Structure is connected with blocking mechanism on the transmission mechanism, and the push rod moves twice along start button axis direction, the push rod two
Secondary promotion transmission mechanism, the transmission mechanism push blocking mechanism mobile primary, and the blocking mechanism end of door plate releases primary limit
System；The transmission mechanism includes the connecting plate being fixed on push rod, and the transmission around own axis is provided on the door-plate
Disk, the transmission disc side are connected with the driver plate contradicted with connecting plate, and the driver plate is circumferentially uniformly distributed along drive plate；It is described to push away
Bar pushes driver plate when mobile, rotates driver plate around drive plate axis, is connected with transmission shaft, the transmission on the drive plate
The drive disk connected on axis, it is described driving disc side be fixed with along drive disk it is circumferentially uniformly distributed make movable plate, the number for making movable plate
Amount is equal to the half of driver plate quantity.
By using above-mentioned technical proposal, when started by press button, start button drives push rod mobile, band when push rod is mobile
Dynamic connecting plate is mobile, and connecting plate pushes driver plate, and driver plate band nutating disk and transmission shaft are rotated around drive shaft axis, transmission shaft
Drive disk rotation is driven when rotation, drive disk rotation, which drives, makees movable plate around drive shaft axis rotation, because making the quantity etc. of movable plate
In the half of driver plate quantity, therefore connecting plate pushes driver plate twice, makees movable plate and exports direct action, locking to blocking mechanism
When mechanism exports direct action, blocking mechanism releases the limitation of end of door plate；When started by press button once disconnects circuit, locking
Mechanism exports the limitation that direct action releases end of door plate, and door-plate is enable to open, when started by press button again, blocking mechanism
It is not acted on, blocking mechanism does not release the limitation of end of door plate, and circuit is opened at this time, and door-plate can not be opened；It realizes
Interlocking on low-voltage cabinet between safety door and circuit switch, only when circuit is in close state, cabinet door could be opened.
The utility model is further arranged to: the blocking mechanism includes and on the baffle that movable plate compresses, the baffle
It is fixedly connected with the sliding bar being slidably connected with door-plate, described sliding bar one end has compressed pressure spring, and the pressure spring is far from sliding bar
One end compress the fixed plate being fixed on door-plate, limitting casing is fixed on the doorframe, the sliding bar is far from pressure spring
One end is inserted into limitting casing.
By using above-mentioned technical proposal, make movable plate and baffle application is acted on, baffle drives sliding bar along sliding rod axis
Direction is mobile, sliding bar further compression press spring when sliding bar is mobile, while one end of sliding bar insertion limitting casing is from limitting casing
It is located on rear side of door-plate after extraction, door-plate can be opened at this time；When being rotated again as movable plate, makees movable plate and do not contradicted with baffle, this
When pressure spring push sliding bar is mobile will be in one end insertion limitting casing of sliding bar.
The utility model is further arranged to: the guide sleeve being fixedly welded on door-plate is arranged on the sliding bar.
By using above-mentioned technical proposal, guide sleeve is slidably connected for realizing sliding bar and door-plate, guides sliding bar
Movement, keep the connection structure of sliding bar simple, connection type is firm.
The utility model is further arranged to: one end that the sliding bar and pressure spring contradict be installed be sheathed in pressure spring and
Across the stabiliser bar of fixed plate.
By using above-mentioned technical proposal, along the deformation itself radially generated when stabiliser bar can reduce pressure spring pressure spring, extend
The service life of pressure spring.
The utility model is further arranged to: the limitting casing is U-shaped frame of the opening towards sliding bar, the limitting casing packet
The connecting lateral plate being fixedly connected with doorframe is included, the connecting lateral plate is installed with limit plate, the limit far from one end of sliding bar
One end on plate far from connecting lateral plate is installed with space limiting side plate, surface and sliding bar side of the space limiting side plate towards connecting lateral plate
Face contradicts.
By using above-mentioned technical proposal, limit mount structure is simple, and cost is relatively low, is able to achieve to sliding radial direction and axis
The limitation in line direction.
The utility model is further arranged to: the support base being fixed on door-plate, the branch are arranged on the transmission shaft
It supports seat and transmission shaft is rotatablely connected.
By using above-mentioned technical proposal, support base is able to achieve the rotation connection of transmission shaft and transmission shaft, connection structure letter
It is single, while support base and the stability of transmission axis connection are preferable.
The utility model is further arranged to: the support base, which is provided with, is located at two of both ends of the drive shaft.
By using above-mentioned technical proposal, there are two support base settings, can be further improved stabilization when transmission shaft rotation
Property.
The utility model is further arranged to: the driver plate is articulated with transmission disc side, is installed on the drive plate
The inconsistent positive stop strip in side with driver plate far from connecting plate.
By using above-mentioned technical proposal, positive stop strip limits driver plate around driver plate and drive plate hinged place far from door-plate side
To rotation, when so that connecting plate is mobile far from door-plate direction, connecting plate pushes driver plate, restriction band of the driver plate by positive stop strip
Nutating disk is rotated around drive shaft axis.
The utility model is further arranged to: being provided with the shield being fixed on door-plate on the outside of the transmission mechanism.
By using above-mentioned technical proposal, shield can protect transmission mechanism, improve the service life of transmission mechanism.
In conclusion the utility model has the following beneficial effects:
1, when started by press button, start button drives push rod mobile, drives connecting plate mobile when push rod is mobile, connecting plate
Driver plate is pushed, driver plate band nutating disk and transmission shaft are rotated around drive shaft axis, drive drive disk to turn when transmission shaft rotates
Dynamic, drive disk rotation, which drives, makees movable plate around drive shaft axis rotation, because the quantity for making movable plate is equal to the half of driver plate quantity,
Therefore connecting plate pushes driver plate twice, makees movable plate and exports direct action to blocking mechanism, when blocking mechanism exports direct action,
The limitation of blocking mechanism releasing end of door plate；When started by press button once disconnects circuit, blocking mechanism exports direct action solution
Except the limitation of end of door plate, door-plate is enable to open, when started by press button again, blocking mechanism is not acted on, locking
Mechanism does not release the limitation of end of door plate, and circuit is opened at this time, and door-plate can not be opened；Realize safety door and electricity on low-voltage cabinet
Interlocking between way switch, only when circuit is in close state, cabinet door could be opened；
2, make movable plate to act on baffle application, baffle drives sliding bar to move along sliding bar axis direction, and sliding bar is mobile
When the further compression press spring of sliding bar, while sliding bar insertion limitting casing one end from limitting casing extraction after be located at door-plate on rear side of,
Door-plate can be opened at this time；When being rotated again as movable plate, make movable plate and do not contradicted with baffle, pressure spring pushes sliding bar mobile at this time
It will be in one end insertion limitting casing of sliding bar；
3, limit mount structure is simple, and cost is relatively low, is able to achieve the limitation to sliding radial direction and axis direction.
Detailed description of the invention
Fig. 1 is the overall structure diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of transmission mechanism in embodiment 1.
In figure, 1, transmission mechanism；11, drive plate；12, driver plate；13, transmission shaft；14, drive disk；15, make movable plate；16,
Support base；17, positive stop strip；18, connecting plate；2, door-plate；21, start button；3, push rod；31, stabilizing base；4, cabinet body；41, door
Frame；5, blocking mechanism；51, baffle；52, sliding bar；53, pressure spring；54, fixed plate；55, guide sleeve；56, stabiliser bar；6, it limits
Frame.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.The wherein identical attached drawing of identical components
Label indicates.
Embodiment 1
A kind of interlock safety door on low-tension switch cabinet, as shown in Figure 1, low-tension switch cabinet includes cabinet body 4, cabinet body 4 is side
Shape shell, 4 side of cabinet body are provided with opening, and 4 opening of cabinet body is welded with doorframe 41, is hingedly connected with door-plate on doorframe 41
2.A start button 21 and three control buttons, on-off of the start button 21 to way circuit on switchgear are fixed on door-plate 2
It is controlled, the on-off of branch on control button control switch cabinet.
As shown in Fig. 2, being connected with the push rod 3 across door-plate 2 in start button 21, push rod 3 protrudes into one end connection of cabinet body 4
There is control switch, control switch is regular tap, the unlatching of control switch is able to achieve after the pressing control switch of push rod 3, control is opened
Closing, when opening 3 position of push rod can stablize, and press the closing that control switch is able to achieve control switch again, control switch is in attached drawing
In be not drawn into.The stabilizing base 31 that guidance push rod 3 is moved along own axes direction is arranged with outside push rod 3, stabilizing base 31 uses screw
It is fixed on door-plate 2.
As shown in Fig. 2, being fixed with the transmission mechanism 1 connecting with push rod 3 on door-plate 2.Transmission mechanism 1 includes being welded in push rod
The connecting plate 18 that 3 sides are arranged along 3 radial direction of push rod.It is fixed with support base 16 using screw on door-plate 2, support base 16 is arranged
There are two, the transmission shaft 13 being rotatablely connected with support base 16 is equipped on support base 16, the both ends of 13 side of transmission shaft offer
Annular groove is connected, support base 16 is inserted at the both ends of transmission shaft 13 respectively, the rotation for being just able to achieve transmission shaft 13 and support base 16 connects
It connects.
As shown in Fig. 2, the drive plate 11 being fixedly connected with transmission shaft 13 is arranged on transmission shaft 13,11 side of drive plate hinge
It is connected to 12 circumferentially uniformly distributed driver plates 12 in succession, the surface of one of driver plate 12 and connecting plate 18 are far from door-plate 2
Surface contradicts, and 11 side of drive plate has been wholely set positive stop strip 17 corresponding with driver plate 12, and positive stop strip 17 limits driver plate 12
It is rotated around driver plate 12 and 11 hinged place of drive plate far from 2 direction of door-plate.When connecting plate 18 is mobile far from 2 direction of door-plate, connection
Plate 18 pushes driver plate 12, and driver plate 12 is rotated by the restriction band nutating disk 11 of positive stop strip 17 around 13 axis of transmission shaft；When
When connecting plate 18 is mobile towards 2 direction of door-plate, when the surface that connecting plate 18 is provided with positive stop strip 17 with driver plate 12 contradicts, even
Fishplate bar 18 pushes driver plate 12 to rotate around driver plate 12 and 11 hinged place of drive plate, so that connecting plate 18 be made to pass through drive plate 11.
It is fixed with drive disk 14 as shown in Fig. 2, being arranged on transmission shaft 13, there are six circumferential uniformly distributed for the setting of 14 side of drive disk
Make movable plate 15, make movable plate 15 along 14 radial direction of drive disk be arranged.
As shown in Fig. 2, making to be connected with blocking mechanism 5 on movable plate 15.Blocking mechanism 5 includes that door-plate 2 is fixed on using screw
On guide sleeve 55, the sliding bar 52 along the sliding of own axes direction is equipped in guide sleeve 55, sliding bar 52 is far from doorframe 41
One end be wholely set the stabiliser bar 56 that diameter is less than sliding bar 52, be arranged on stabiliser bar 56 and be fixed on door-plate using screw
Fixed plate 54 on 2 is arranged with the pressure spring 53 that both ends are compressed with sliding bar 52 and fixed plate 54 respectively on stabiliser bar 56.
As shown in Fig. 2, 52 side of sliding bar is welded with baffle 51, surface of the baffle 51 far from pressure spring 53 and make movable plate
15 surfaces contradict.
As shown in Fig. 2, being fixed with limitting casing 6 on doorframe 41, limitting casing 6 is U-shaped frame of the opening towards sliding bar 52.Limit
Frame 6 includes the connecting lateral plate being fixedly connected with doorframe 41 using screw, and connecting lateral plate is wholely set far from one end of sliding bar 52
There is a limit plate, one end on limit plate far from connecting lateral plate has been wholely set space limiting side plate, and space limiting side plate is towards connecting lateral plate
Surface and 52 side of sliding bar contradict.It is provided with the shield being fixed on door-plate 2 on the outside of transmission mechanism 1, shield is by transmission mechanism 1
Protection is covered, shield is not drawn into the accompanying drawings.
A kind of interlock safety door on low-tension switch cabinet, the course of work are as follows:
When started by press button 21 closes circuit, start button 21 drives push rod 3 to move along 3 axis direction of push rod
Dynamic, push rod 3 is mobile to drive connecting plate 18 to move along 3 axis direction of push rod, and driver plate 12, driver plate are pushed when connecting plate 18 is mobile
12 by positive stop strip 17 restriction band nutating disk 11 around 13 axis of transmission shaft rotate, drive plate 11 rotate when drive transmission shaft 13
Rotation；
Drive disk 14 is driven to rotate when transmission shaft 13 rotates, the rotation of drive disk 14, which drives, makees movable plate 15 around 13 axis of transmission shaft
Rotation pushes baffle 51 when driver plate 12 rotates；
Baffle 51 drives sliding bar 52 to move along 52 axis direction of sliding bar, and sliding bar 52 is further when sliding bar 52 is mobile
Compression press spring 53, while sliding bar 52 is inserted into one end of limitting casing 6 and is located at the rear side of door-plate 2 after the extraction of limitting casing 6, at this time can will
Door-plate 2 is opened；
When started by press button 21 again, circuit is opened, and connecting plate 18 can push driver plate 12 again, and driver plate 12 passes through
Drive plate 11 drives transmission shaft 13 to rotate, and transmission shaft 13 drives drive disk 14 to rotate, and makees movable plate 15 at this time and separates with baffle 51, sliding
The pressure effect for the pressure spring 53 that lever 52 is subject to, which is moved towards limitting casing 6 and is inserted into limitting casing 6, makes 52 side of sliding bar and limit
Position 6 medial surface of frame contradicts, and realizes the locking of door-plate 2 and doorframe 41.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (9)
1. the interlock safety door on a kind of low-tension switch cabinet, including doorframe (41), door-plate (2) are hinged on the doorframe (41),
It is characterized by: being provided with start button (21) on the door-plate (2), it is connected with control switch on the start button (21),
The start button (21) moves along own axes direction and realizes being switched on or switched off for control switch, and the start button (21) is stretched
The one end for entering doorframe (41) is fixed with push rod (3), and the push rod (3) contradicts far from the one end of start button (21) transmission mechanism
(1), it is connected with blocking mechanism (5) on the transmission mechanism (1), the push rod (3) is mobile along start button (21) axis direction
Twice, the push rod (3) pushes transmission mechanism (1) twice, and the transmission mechanism (1) pushes blocking mechanism (5) mobile primary, institute
It states blocking mechanism (5) end of door plate (2) and releases primary limitation；
The transmission mechanism (1) includes the connecting plate (18) being fixed on push rod (3), is provided on the door-plate (2) around itself
The drive plate (11) of axis rotation, drive plate (11) side are connected with the driver plate (12) contradicted with connecting plate (18), institute
It is circumferentially uniformly distributed along drive plate (11) to state driver plate (12)；
Driver plate (12) are pushed when the push rod (3) is mobile, rotate driver plate (12) around drive plate (11) axis, the transmission
It is connected on disk (11) transmission shaft (13), the drive disk (14) connected on the transmission shaft (13), drive disk (14) side
It is fixed with and makees movable plate (15) along drive disk (14) is circumferentially uniformly distributed, the quantity for making movable plate (15) is equal to driver plate (12) quantity
Half.
2. the interlock safety door on low-tension switch cabinet according to claim 1, it is characterised in that: the blocking mechanism (5)
Including with the baffle (51) making movable plate (15) and compress, be fixedly connected with the cunning being slidably connected with door-plate (2) on the baffle (51)
Lever (52), described sliding bar (52) one end have compressed pressure spring (53), and the pressure spring (53) is supported far from the one end of sliding bar (52)
It is pressed with the fixed plate (54) being fixed on door-plate (2), is fixed with limitting casing (6) on the doorframe (41), the sliding bar (52)
In one end insertion limitting casing (6) far from pressure spring (53).
3. the interlock safety door on low-tension switch cabinet according to claim 2, it is characterised in that: on the sliding bar (52)
It is arranged with the guide sleeve (55) being fixedly welded on door-plate (2).
4. the interlock safety door on low-tension switch cabinet according to claim 2, it is characterised in that: the sliding bar (52) with
One end that pressure spring (53) contradicts is installed with the stabiliser bar (56) for being sheathed in pressure spring (53) and passing through fixed plate (54).
5. the interlock safety door on low-tension switch cabinet according to claim 2, it is characterised in that: the limitting casing (6) is
The U-shaped frame being open towards sliding bar (52), the limitting casing (6) includes the connecting lateral plate being fixedly connected with doorframe (41), described
Connecting lateral plate is installed with limit plate far from one end of sliding bar (52), and one end far from connecting lateral plate is installed on the limit plate
Space limiting side plate, the space limiting side plate are contradicted towards the surface of connecting lateral plate and sliding bar (52) side.
6. the interlock safety door on low-tension switch cabinet according to claim 2, it is characterised in that: on the transmission shaft (13)
It is arranged with the support base (16) being fixed on door-plate (2), the support base (16) and transmission shaft (13) are rotatablely connected.
7. the interlock safety door on low-tension switch cabinet according to claim 6, it is characterised in that: the support base (16) sets
It is equipped with two for being located at transmission shaft (13) both ends.
8. the interlock safety door on low-tension switch cabinet according to claim 1, it is characterised in that: driver plate (12) hinge
It is connected to drive plate (11) side, is installed on the drive plate (11) and offsets with driver plate (12) far from the side of connecting plate (18)
The positive stop strip (17) of touching.
9. the interlock safety door on low-tension switch cabinet according to claim 1, it is characterised in that: the transmission mechanism (1)
Outside is provided with the shield being fixed on door-plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653220.4U CN208835484U (en) | 2018-10-11 | 2018-10-11 | Interlock safety door on low-tension switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821653220.4U CN208835484U (en) | 2018-10-11 | 2018-10-11 | Interlock safety door on low-tension switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208835484U true CN208835484U (en) | 2019-05-07 |
Family
ID=66318846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821653220.4U Expired - Fee Related CN208835484U (en) | 2018-10-11 | 2018-10-11 | Interlock safety door on low-tension switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208835484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614390A (en) * | 2022-03-17 | 2022-06-10 | 宇超电力股份有限公司 | Solid insulation ring main unit convenient to maintain and using method thereof |
-
2018
- 2018-10-11 CN CN201821653220.4U patent/CN208835484U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614390A (en) * | 2022-03-17 | 2022-06-10 | 宇超电力股份有限公司 | Solid insulation ring main unit convenient to maintain and using method thereof |
| CN114614390B (en) * | 2022-03-17 | 2023-02-28 | 宇超电力股份有限公司 | Solid insulation ring main unit convenient to maintain and using method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190507 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |