CN109412068B - Gas-insulated metal-enclosed switchgear and observation device thereof - Google Patents
Gas-insulated metal-enclosed switchgear and observation device thereof Download PDFInfo
- Publication number
- CN109412068B CN109412068B CN201710708327.8A CN201710708327A CN109412068B CN 109412068 B CN109412068 B CN 109412068B CN 201710708327 A CN201710708327 A CN 201710708327A CN 109412068 B CN109412068 B CN 109412068B
- Authority
- CN
- China
- Prior art keywords
- observation
- base
- gas
- lens
- insulated metal
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/045—Details of casing, e.g. gas tightness
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to a gas insulated metal-enclosed switchgear and an observation device thereof. The gas-insulated metal-enclosed switchgear comprises a device shell with an observation port, wherein the observation port is provided with an observation device, an observation channel on a base body of the observation device corresponds to the observation port, the front end of the observation channel is provided with a concave objective lens at a position close to the observation port, the observation channel is provided with a convex lens for observing a real image formed by the concave objective lens at the rear side of the concave objective lens, the concave lens enlarges the observable visual field range, and when the observation is directly carried out, the convex lens enlarges the real image formed by the concave lens and has smaller size, so that the observation is facilitated; during remote observation, the camera is installed in the observation channel, and images in the equipment shell are acquired through the matching of the lens in the camera and the concave lens, so that remote observation is realized. Through the cooperation of the concave lens and the convex lens or the camera, the observable range is enlarged, and clear images can be obtained.
Description
Technical Field
The invention relates to a gas insulated metal-enclosed switchgear and an observation device thereof.
Background
GIS equipment is gas insulated metal enclosed switchgear, and GIS equipment's casing is metal material, can't see through the casing and observe inside. In order to observe the inside of the equipment in the prior art, an observation window is arranged on a shell, and the operation condition inside the equipment is observed through the observation window. For example, the chinese utility model patent with application number 201120421112.6 discloses a switchgear, has seted up the viewing aperture on this switchgear's the casing, and the viewing aperture seals through visual printing opacity component and forms the observation window, directly sees through visual printing opacity component to observe switchgear's inside during the use. Although such a switching device is capable of observing the inside of the device, the range of observation is small due to the limitation of the size of the observation port.
Disclosure of Invention
The invention aims to provide a gas insulated metal-enclosed switchgear, which aims to solve the problem that the existing gas insulated metal-enclosed switchgear can have a small observation range; meanwhile, the invention also provides an observation device for the gas insulated metal-enclosed switchgear.
In order to achieve the purpose, the gas insulated metal enclosed switchgear adopts the following technical scheme:
the technical scheme 1: the gas-insulated metal-enclosed switchgear comprises a device shell with an observation port, wherein the observation port is provided with an observation device, the observation device comprises a base body, the base body is provided with an observation channel corresponding to the observation port, a concave objective lens is arranged at the position, close to the observation port, of the front end of the observation channel, the observation channel is provided with a convex eyepiece for observing a real image formed by the concave objective lens at the rear side of the concave objective lens, or the observation channel is provided with a mounting structure for mounting a camera capable of shooting the real image formed by the concave objective lens at the rear side of the concave objective lens, the concave objective lens enlarges the observable visual field range, and when the observation is directly carried out, the convex eyepiece lens enlarges the small-size real image formed by the concave objective lens, so that the observation is convenient; during remote observation, the camera is installed in the observation channel, and images in the equipment shell are acquired through the matching of the lens in the camera and the concave lens, so that remote observation is realized. Through the cooperation of the concave lens and the convex lens or the camera, the observable range is enlarged, and clear images can be obtained.
Technical solution 9, on the basis of technical solution 8: the observation channel is provided with a mounting structure for mounting a camera capable of shooting a real image formed by the concave lens at the rear side of the concave lens, and the illuminating lamp comprises an infrared lamp, so that remote observation can be realized through the camera.
Technical scheme 10, on the basis of any one of technical scheme 1~ 6: the convex lens is installed in the observation channel through the installation plate, and the installation plate is provided with a lens hood of the convex lens.
The observation device for the gas insulated metal enclosed switchgear adopts the following technical scheme:
the technical scheme 1: the observation device for the gas-insulated metal-enclosed switchgear comprises a base body with a connecting structure for being hermetically connected with a switchgear shell, wherein the base body is provided with an observation channel corresponding to an observation port of the switchgear shell, a concave objective lens is arranged at the position, close to the observation port, of the front end of the observation channel, a convex eyepiece for observing a real image formed by the concave objective lens is arranged on the rear side of the concave objective lens of the observation channel, or an installation structure for installing a camera capable of shooting the real image formed by the concave objective lens is arranged on the rear side of the concave objective lens of the observation channel, the concave objective lens expands the observable visual field range, and when the observation device is used for directly observing, the concave objective lens expands the real image formed by the concave objective lens and has a smaller size, so that the observation is convenient; during remote observation, the camera is installed in the observation channel, and images in the equipment shell are acquired through the matching of the lens in the camera and the concave lens, so that remote observation is realized. Through the cooperation of the concave lens and the convex lens or the camera, the observable range is enlarged, and clear images can be obtained.
Technical solution 9, on the basis of technical solution 8: the observation channel is provided with a mounting structure for mounting a camera capable of shooting a real image formed by the concave lens at the rear side of the concave lens, and the illuminating lamp comprises an infrared lamp, so that remote observation can be realized through the camera.
Technical scheme 10, on the basis of any one of technical scheme 1~ 6: the convex lens is installed in the observation channel through the installation plate, and the installation plate is provided with a lens hood of the convex lens.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the gas-insulated metal-enclosed switchgear of the present invention;
FIG. 2 is a schematic view of the observation device in FIG. 1;
FIG. 3 is a perspective view from the top perspective of FIG. 2;
FIG. 4 is a perspective view from the bottom perspective of FIG. 2;
in the drawings: 1. an equipment housing; 2. a base; 3. a concave lens; 4. a support body; 5. adjusting a rod; 6. a convex lens; 7. an illuminating lamp; 8. a ring gear; 21. a base overhang ear; 41. the support body overhangs the ear; 51. an adjusting gear; 52. operating the nut; 61. mounting a disc; 62. a light shield; 71. a power source.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In embodiment 1 of the gas-insulated metal-enclosed switchgear of the present invention, as shown in fig. 1 to 4, the gas-insulated metal-enclosed switchgear includes a device housing 1 having an observation port, an observation device is provided at the observation port of the device housing 1, and the observation device includes a base body including a base 2 and a support body 4 mounted on the base 2. The base 2 is in a step shaft shape as a whole, the base 2 is provided with an inner hole with a large lower end and a small upper end, and the concave lens 3 is arranged in the inner hole of the part with the large lower end. When the concave lens 3 is poured, the concave lens 3 is directly poured into the inner hole of the base 2, so that the concave lens 3 and the base 2 are integrally arranged, and the sealing performance between the concave lens 3 and the base 2 is ensured. The two ends of the inner hole of the base 2 for pouring the concave lens 3 are provided with conical flaring structures, and the angle A of the conical surface of each flaring structure is 120 degrees, so that the observation visual field is conveniently expanded. The thick portion of base 2 lower extreme and the laminating of equipment casing 1 and be equipped with the sealing washer between the binding face, concave lens 3 on base 2 is just right to the viewing aperture behind base 2 installs on equipment casing 1, and the leakproofness of equipment casing 1 has been guaranteed to the sealing washer simultaneously, avoids its inside gas leakage, and the material of base is the stainless steel, installs on equipment casing through the bolt.
A supporting body 4 with a cylindrical structure is inserted in a thin inner hole at the upper end of the base 2, the inner hole of the supporting body 4 is communicated with the inner hole of the base 2 to form an observation channel extending upwards from the observation port, and the concave lens 3 is positioned at the front end of the observation channel and close to the observation port. The support body 4 is matched with the base 2 in a guiding and moving way, and a sealing ring is arranged between the guiding and moving matching surfaces to ensure the sealing property of the observation channel. The convex lens assembly is installed in the rear side of observation passageway in the hole of the upper end of supporter 4 promptly in concave lens, and convex lens assembly is in within the one time focus of concave lens, and convex lens assembly includes convex lens 6 and mounting disc 61, and convex lens 6 sets up in the hole of mounting disc 61, is equipped with the sealing washer between the interior pore wall of mounting disc 61 and supporter 4, guarantees the leakproofness. A light shield 62 is further provided on the outer side of the mounting plate 61 for shielding light when directly viewed.
An adjusting driving mechanism for driving the supporting body 4 to move on the base 2 in a guiding way is further arranged between the base 2 and the supporting body 4, and the adjusting driving mechanism comprises an adjusting rod 5 which is rotatably assembled on the base 2. The periphery of the upper part of the base 2 is provided with a base overhanging ear 21 which overhangs outwards, the periphery of the upper end part of the support body 4 is also provided with a support body overhanging ear 41 relatively, the lower end of the adjusting rod 5 is rotatably assembled on the base overhanging ear 21, and the upper end of the adjusting rod 5 is in threaded fit with the support body overhanging ear 41. An adjusting gear 51 is integrally arranged on the periphery of the adjusting rod 5 at the position close to the base extension disc, and a gear ring 8 in meshing transmission with the adjusting gear 51 on the adjusting rod 5 is rotatably assembled on the periphery of the base 2. In this embodiment, there are four adjusting rods 5, four pairs of overhanging ears corresponding to the four adjusting rods are also provided on the base 2 and the support 4, the four adjusting rods 5 are all engaged with the gear ring 8 through respective adjusting gears 51 for transmission, so that the four adjusting rods 5 synchronously rotate, when one of the adjusting rods 5 is rotated, the other three adjusting rods 5 synchronously rotate to drive the support 4 to move on the base 2, thereby adjusting the distance between the convex lens 6 on the support 4 and the concave lens 3 on the base 2, i.e., achieving the focusing function, and meanwhile, the gear ring has a speed reduction function, so as to facilitate fine adjustment, and the adjusting gears 51 and the gear ring 8 form a linkage mechanism for synchronously rotating the adjusting rods 5. The lower end position of one of the adjusting rods 5 is equipped with an operating nut 52 in a rotation stopping manner, and the operating nut is arranged at the lower end position, so that adjustment and focusing can be synchronously performed during observation, and operation is facilitated. The four adjusting rods 5 play an adjusting role on one hand, and on the other hand, after the four adjusting rods 5 are adjusted in place, the four adjusting rods 5 form supporting columns between the supporting body 4 and the base 2, so that the structural strength between the supporting body 4 and the base 2 is guaranteed.
The nitrogen gas with certain pressure is filled in the observation channel between the convex lens 6 and the concave lens 3, the pressure of the nitrogen gas can balance the pressure at two sides of the concave lens 3, the single side of the concave lens 3 is prevented from being pressed and deformed or even broken by the gas pressure in the equipment shell 1, the overall stability of the observation device is improved, and the cavity of the observation channel between the concave lens and the convex lens is the air cavity for balancing the pressure at two sides of the concave lens. The hole edge that 2 lower extremes of base are used for fixed protruding through eyepiece 6 is stretched to the middle part position overhang of viewing aperture, this part hole edge is equipped with the mounting hole on the side towards 1 inside of equipment casing, light 7 is installed in the mounting hole and the head of light 7 is in the inside of mounting hole, like this when throwing light on through light 7 to 1 inside of equipment casing, the light of light 7 only can be towards 1 inside diffusion of equipment casing, can not see through the concave mirror and spread outward, do benefit to the observation. Light 7 divide into LED lamp and infrared lamp, and power 71 is used for supplying power to these two kinds of lamps, and every kind of these two kinds of lamps has four and evenly staggered distribution on base 2, can throw light on through the LED lamp during ordinary observation, can adopt the infrared lamp illumination when surveing the temperature rise experiment, and the temperature rise that can observe 1 inner conductor of equipment casing changes with the heat-sensitive camera simultaneously, mainly conveniently is used for scientific research and earlier stage design development.
When the interior of the equipment shell 1 needs to be observed, power is supplied to the illuminating lamp through the power supply 71, the interior of the equipment shell 1 is illuminated, a reduced real image is formed on one side, close to the convex lens 6, of an object in the shell through the concave lens 3, the support body 4 is adjusted to move through the adjusting rod 5 at the moment until the enlarged and upright image can be seen from the convex lens 6, and the interior of the equipment can be clearly observed at the moment. The concave lens 3 enlarges the range of the visual field, enlarges the observable range in the equipment shell, and the convex eyepiece 6 enlarges the real image formed by the concave lens 3 to obtain a clear image, thereby facilitating observation.
In embodiment 2 of the gas-insulated metal-enclosed switchgear of the present invention, in this embodiment, a convex lens assembly is not installed, and at this time, the camera is installed on the support, and an image obtained by the camera inside the enclosure of the switchgear is obtained through the cooperation of the lens assembly in the camera and the concave mirror, which is generally applied to a hazard test, and at this time, the adjusting lever can be connected to the driving motor to drive the adjusting lever to rotate, so that the adjusting lever can be remotely adjusted to rotate, thereby achieving the purpose of remote focusing, ensuring the safety of an observer, and being the same as that in embodiment 1, and the rest are the same as those in embodiment 1, and are not described again.
In embodiment 3 of the gas insulated metal-enclosed switchgear of the present invention, in this embodiment, only one adjusting lever is provided, and corresponding guide posts may be provided to prevent the adjusting lever from deviating when driving the supporting body to move, and the others are the same as those in embodiment 1 and are not described again.
In embodiment 4 of the gas insulated metal-enclosed switchgear of the present invention, in this embodiment, the number of the adjusting rods is three, five, or other numbers, and these adjusting rods all rotate synchronously through the gear ring, and the others are the same as those in embodiment 1 and are not described again.
In embodiment 5 of the gas insulated metal-enclosed switchgear of the present invention, in this embodiment, a synchronous pulley may be further disposed on the four adjusting rods, and then a synchronous belt is mounted on the synchronous pulley of the four adjusting rods, so that the four adjusting rods rotate synchronously through the synchronous belt, and the rest is the same as that in embodiment 1, and will not be described again.
In embodiment 6 of the gas insulated metal-enclosed switchgear of the present invention, in this embodiment, the operation nuts are disposed on the adjustment rods, and at this time, the focal length can be adjusted by operating any one of the adjustment rods, which is the same as that in embodiment 1, and will not be described again.
In the embodiment of the observation device for the gas-insulated metal-enclosed switchgear according to the present invention, the observation device for the gas-insulated metal-enclosed switchgear has the same structure as the observation device for the gas-insulated metal-enclosed switchgear in the above embodiment, and thus, the description thereof is omitted.
Claims (18)
1. Gas insulated metal-enclosed switchgear, including the equipment casing that has the viewing port, its characterized in that: the observation port is provided with an observation device which comprises a base body, the base body is provided with an observation channel corresponding to the observation port, a concave lens is arranged at the front end of the observation channel and close to the observation port, a convex lens for observing a real image formed by the concave lens is arranged at the rear side of the concave lens of the observation channel, or the observation channel is provided with a mounting structure for mounting a camera capable of shooting a real image formed by the concave lens on the rear side of the concave lens, the basal body comprises a base and a supporting body, the base and the supporting body are both provided with inner holes, the inner holes of the base are communicated with the inner holes of the supporting body to form the observation channel, the convex lens or the mounting structure is arranged on the support body, the concave lens is arranged on the base, and the support body is guided to move and assembled on the base so that the focal length of the observation equipment can be adjusted.
2. The gas-insulated metal-enclosed switchgear device according to claim 1, wherein: and an adjusting driving mechanism for driving the support body to guide and move on the base is arranged between the base and the support body.
3. The gas-insulated metal-enclosed switchgear device according to claim 2, characterized in that: the adjusting driving mechanism comprises an adjusting rod which is rotatably assembled on the base, and the adjusting rod is in threaded fit with the support body.
4. The gas-insulated metal-enclosed switchgear device according to claim 3, wherein: the adjusting rod is provided with more than two adjusting rods and synchronously rotates through a linkage mechanism.
5. The gas-insulated metal-enclosed switchgear device according to claim 4, wherein: the linkage mechanism comprises a gear ring which is rotatably assembled on the periphery of the base and an adjusting gear which is assembled on the adjusting rod in a rotation stopping manner and is in meshing transmission with the gear ring.
6. A gas insulated metal enclosed switchgear according to any one of claims 1 to 5, characterized in that: and a convex lens for observing a real image formed by the convex lens is arranged in the observation channel and at the rear side of the concave lens, and the observation device is provided with an air cavity for balancing the pressure at two sides of the concave lens.
7. A gas insulated metal enclosed switchgear according to any one of claims 1 to 5, characterized in that: the side face, facing the inside of the switch equipment, of the base body is provided with a mounting hole, and the head portion, provided with an illuminating lamp, of the mounting hole is located inside the mounting hole.
8. The gas-insulated metal-enclosed switchgear device according to claim 7, wherein: the observation channel is provided with a mounting structure for mounting a camera capable of shooting a real image formed by the concave lens at the rear side of the concave lens, and the illuminating lamp comprises an infrared lamp.
9. A gas insulated metal enclosed switchgear according to any one of claims 1 to 5, characterized in that: the convex lens is installed in the observation channel through the installation plate, and the installation plate is provided with a lens hood of the convex lens.
10. Observation device for gas insulated metal-enclosed switchgear, its characterized in that: comprising a base body with a connection structure for the sealed connection to a switchgear housing, said base body having an observation channel corresponding to an observation opening of the switchgear housing, a concave lens is arranged at the front end of the observation channel and close to the observation port, a convex lens for observing a real image formed by the concave lens is arranged at the rear side of the concave lens of the observation channel, or the observation channel is provided with a mounting structure for mounting a camera capable of shooting a real image formed by the concave lens on the rear side of the concave lens, the basal body comprises a base and a supporting body, the base and the supporting body are both provided with inner holes, the inner holes of the base are communicated with the inner holes of the supporting body to form the observation channel, the convex lens or the mounting structure is arranged on the support body, the concave lens is arranged on the base, and the support body is guided to move and assembled on the base so that the focal length of the observation equipment can be adjusted.
11. The observation device for a gas-insulated metal-enclosed switchgear according to claim 10, wherein: and an adjusting driving mechanism for driving the support body to guide and move on the base is arranged between the base and the support body.
12. The observation device for a gas-insulated metal-enclosed switchgear according to claim 11, wherein: the adjusting driving mechanism comprises an adjusting rod which is rotatably assembled on the base, and the adjusting rod is in threaded fit with the support body.
13. The observation device for a gas-insulated metal-enclosed switchgear according to claim 12, wherein: the adjusting rod is provided with more than two adjusting rods and synchronously rotates through a linkage mechanism.
14. The observation device for a gas-insulated metal-enclosed switchgear according to claim 13, wherein: the linkage mechanism comprises a gear ring which is rotatably assembled on the periphery of the base and an adjusting gear which is assembled on the adjusting rod in a rotation stopping manner and is in meshing transmission with the gear ring.
15. The observation device for a gas-insulated metal-enclosed switchgear according to any one of claims 10 to 14, wherein: and a convex lens for observing a real image formed by the convex lens is arranged in the observation channel and at the rear side of the concave lens, and the observation device is provided with an air cavity for balancing the pressure at two sides of the concave lens.
16. The observation device for a gas-insulated metal-enclosed switchgear according to any one of claims 10 to 14, wherein: the side face, facing the inside of the switch equipment, of the base body is provided with a mounting hole, and the head portion, provided with an illuminating lamp, of the mounting hole is located inside the mounting hole.
17. The observation device for a gas-insulated metal-enclosed switchgear according to claim 16, wherein: the observation channel is provided with a mounting structure for mounting a camera capable of shooting a real image formed by the concave lens at the rear side of the concave lens, and the illuminating lamp comprises an infrared lamp.
18. The observation device for a gas-insulated metal-enclosed switchgear according to any one of claims 10 to 14, wherein: the convex lens is installed in the observation channel through the installation plate, and the installation plate is provided with a lens hood of the convex lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708327.8A CN109412068B (en) | 2017-08-17 | 2017-08-17 | Gas-insulated metal-enclosed switchgear and observation device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710708327.8A CN109412068B (en) | 2017-08-17 | 2017-08-17 | Gas-insulated metal-enclosed switchgear and observation device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109412068A CN109412068A (en) | 2019-03-01 |
| CN109412068B true CN109412068B (en) | 2020-10-27 |
Family
ID=65455069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710708327.8A Expired - Fee Related CN109412068B (en) | 2017-08-17 | 2017-08-17 | Gas-insulated metal-enclosed switchgear and observation device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109412068B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628935A (en) * | 2020-05-06 | 2021-11-09 | 河南平芝高压开关有限公司 | Gas-insulated metal-enclosed switchgear and observation window thereof |
| CN112362936A (en) * | 2020-09-10 | 2021-02-12 | 国网浙江省电力有限公司温州供电公司 | Ammeter case convenient to check meter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202796315U (en) * | 2012-08-23 | 2013-03-13 | 广州西门子变压器有限公司 | Transformer with viewing window |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2755635Y (en) * | 2004-12-31 | 2006-02-01 | 朱江 | Optical lens of mobile |
| CN202125890U (en) * | 2011-06-29 | 2012-01-25 | 山东神戎电子股份有限公司 | Remote laser zooming lighting device |
| CN103115266B (en) * | 2013-02-01 | 2014-03-12 | 深圳市保千里电子有限公司 | Laser lighting device |
| CN104459963B (en) * | 2014-12-18 | 2017-02-22 | 福建福光股份有限公司 | High-resolution manual zoom camera lens and control method thereof |
| CN205427305U (en) * | 2016-02-03 | 2016-08-03 | 中国科学院云南天文台 | Be used for adjusting confocal focusing camera of astronomical telescope system and focusing device thereof |
-
2017
- 2017-08-17 CN CN201710708327.8A patent/CN109412068B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202796315U (en) * | 2012-08-23 | 2013-03-13 | 广州西门子变压器有限公司 | Transformer with viewing window |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109412068A (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109412068B (en) | Gas-insulated metal-enclosed switchgear and observation device thereof | |
| CN103454761A (en) | Microscope device capable of observing object to be tested at multiple angles | |
| EP3028355B1 (en) | Gas insulated switching device and camera system for optical check of switching position in the switching device | |
| CN110056842A (en) | A kind of single star simulator and its light source | |
| CN216351523U (en) | Observation mirror for maintaining mechanical equipment | |
| CN206686275U (en) | The adjustable cam device of fixed angle | |
| CN111698495A (en) | Binocular camera | |
| CN206176158U (en) | LED projecting lamp that can zoom | |
| US3475079A (en) | Movably supported dispersion viewer | |
| CN115473151A (en) | Ring main unit | |
| CN2473630Y (en) | Oil drop tester | |
| CN109140301B (en) | Quick lighting apparatus installation device with pitching angle adjusting function | |
| KR101881579B1 (en) | The Flood Lighting capable of adjustable angle | |
| CN214011624U (en) | Observation mirror for maintaining mechanical equipment | |
| CN112485667A (en) | GIS opening and closing position detection device | |
| CN113208804B (en) | Comprehensive therapeutic instrument for amblyopia and myopia | |
| CN211605703U (en) | Small-size cubical switchboard with illumination function | |
| CN208969884U (en) | A kind of multimedia teaching facility | |
| CN217508880U (en) | Video monitoring device for high-voltage switch cabinet | |
| CN217307801U (en) | Image smear testing device for camera shooting component | |
| CN220038136U (en) | Adjustable mounting bracket of security monitoring equipment | |
| CN213302656U (en) | Coaxial light microscope protection architecture convenient to installation | |
| CN219283179U (en) | LED operation shadowless lamp of adjustable focus | |
| CN218211873U (en) | Double-view-field camera imaging time difference measuring device | |
| CN209345260U (en) | A kind of novel all-in-one monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |