CN110797763A - Intelligent heat dissipation type high-low switch cabinet - Google Patents
Intelligent heat dissipation type high-low switch cabinet Download PDFInfo
- Publication number
- CN110797763A CN110797763A CN201911108659.8A CN201911108659A CN110797763A CN 110797763 A CN110797763 A CN 110797763A CN 201911108659 A CN201911108659 A CN 201911108659A CN 110797763 A CN110797763 A CN 110797763A
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- China
- Prior art keywords
- cabinet
- cabinet body
- fixedly connected
- heat dissipation
- dissipation type
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- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- 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
-
- 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
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
Abstract
The invention discloses an intelligent heat dissipation type high-low switch cabinet, and relates to the technical field of power equipment. Including the cabinet body, the front of the cabinet body has the cabinet door through the hinge is articulated, and the ventilation pipe has all been seted up to the inner wall of cabinet body both sides, and the quantity of ventilation pipe is four, and the opening part that four ventilation pipes are located cabinet body surface all is provided with the filter screen, and the inside fixed mounting of ventilation pipe has the exhaust fan, and the top fixed mounting of cabinet body inner chamber has cooling fan. This intelligence heat dissipation type height cubical switchboard, through setting up the ventilation pipe, exhaust fan and cooling fan, utilize ventilation pipe and cooling fan to lead the external portion of cabinet with the internal heat of cabinet, the cooperation exhaust fan, the internal air flow speed of cabinet accelerates, thereby further make the internal temperature reduction of cabinet, utilize dry box to adsorb the internal moisture of cabinet, keep the internal drying of cabinet, improve the humidity resistance of the cabinet body, thereby avoid the too high temperature or the too high problem that can make the internal electrical component of cabinet damage of humidity, the normal operating of cubical switchboard has been guaranteed.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to an intelligent heat dissipation type high-low switch cabinet.
Background
The switch cabinet is an electrical device, the external line of the switch cabinet firstly enters a main control switch in the cabinet and then enters a branch control switch, each branch circuit is arranged according to the requirement, the switch cabinet mainly has the function of opening, closing, controlling and protecting the electrical equipment in the process of generating, transmitting, distributing and converting electric energy of an electric power system, and the switch cabinet has a plurality of classification methods, such as a movable switch cabinet and a fixed switch cabinet, by the installation mode of a 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, and the high-voltage switch cabinet, the medium-voltage switch cabinet, the low-voltage switch cabinet and the like are mainly suitable for various occasions such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industrial textile, factories and mining enterprises, residential districts, high-rise buildings and the like.
1. In the use process of the switch cabinet in the prior art, because a large amount of heat is generated inside the cabinet body in the use process of the switch cabinet, the temperature inside the cabinet body is overhigh, the heat cannot be timely dissipated by the conventional switch cabinet, so that the service life of internal elements of the switch cabinet is influenced;
2. in the using process of the switch cabinet in the prior art, when the switch cabinet needs to be overhauled, elements inside the switch cabinet are inconvenient to install and disassemble, the overhauling time of the switch cabinet is too long, the operation of workers is inconvenient, and the overhauling efficiency is affected.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an intelligent heat-dissipation high-low switch cabinet which has the advantages of good heat dissipation effect, capability of well controlling the temperature and the humidity in the switch cabinet, convenience in mounting and dismounting internal elements of the switch cabinet, convenience in overhauling of workers and the like, and solves the problem of common use effect of the existing switch cabinet.
(II) technical scheme
In order to achieve the purposes of good heat dissipation effect, capability of well controlling the temperature and humidity in the switch cabinet, convenience for mounting and dismounting internal elements of the switch cabinet and convenience for maintenance of workers, the invention provides the following technical scheme: an intelligent heat dissipation type high-low switch cabinet comprises a cabinet body, wherein the front side of the cabinet body is hinged with a cabinet door through a hinge, the inner walls of two sides of the cabinet body are respectively provided with four ventilation pipes, the opening parts of the four ventilation pipes, which are positioned on the surface of the cabinet body, are respectively provided with a filter screen, an exhaust fan is fixedly installed inside the ventilation pipes, a heat dissipation fan is fixedly installed at the top of the inner cavity of the cabinet body, a supporting plate is arranged inside the cabinet body, the upper surface of the supporting plate is fixedly connected with a connecting plate, the upper surface of the connecting plate is provided with a first jack, a movable rod is movably connected inside the first jack, and the inner wall of the first jack;
the surface of the movable rod is fixedly connected with a movable block, the movable block is movably connected inside the groove, the inner wall of the groove is fixedly connected with a limiting block, the limiting block is positioned above the movable block, the lower surface of the movable block is fixedly connected with an expansion spring, the other end of the expansion spring is fixedly connected with the bottom of the inner wall of the groove, a second partition plate and a first partition plate are sequentially arranged above the supporting plate and positioned inside the cabinet body from bottom to top, and the top end of the movable rod penetrates through the second partition plate, extends to the upper part of the second partition plate and is inserted into a first slot inside the first partition plate;
the equal fixedly connected with inserted bar in both sides of second division board upper surface, two the one end that the second division board was kept away from to the inserted bar is pegged graft in the second slot of internal wall both sides of cabinet, the dry box of bottom fixedly connected with of the cabinet body, the inside swing joint of dry box has the pull board, the equal fixedly connected with coupling spring in both sides of pull inboard wall, the one end fixedly connected with arc clamp splice that coupling spring kept away from the pull inboard wall, one side fixedly connected with that coupling spring was kept away from to the arc clamp splice is placed the net.
As a preferred technical scheme of the invention, the front surface of the cabinet door is provided with an observation window, and the observation window is a toughened glass observation window.
As a preferable technical scheme of the invention, the bottom end of the movable rod penetrates and extends to the lower part of the supporting plate, and is fixedly connected with a connecting block.
As a preferable technical solution of the present invention, the support plate is provided with through holes therein, and the number of the through holes is four.
As a preferable technical scheme of the invention, the front side of the drying box is hinged with a cover plate through a hinge, the upper surface of the drying box is provided with an air outlet, and the surfaces of the cabinet door and the cover plate are both provided with handles.
As a preferable technical solution of the present invention, the upper surfaces of the first partition plate and the second partition plate are both provided with an electrical component.
As a preferable technical scheme of the invention, through grooves matched with the movable rods are formed in the supporting plate and the second partition plate.
(III) advantageous effects
Compared with the prior art, the invention provides an intelligent heat dissipation type high-low switch cabinet, which has the following beneficial effects:
1. this intelligence heat dissipation type height cubical switchboard, through setting up the ventilation pipe, exhaust fan and cooling fan, utilize ventilation pipe and cooling fan to lead the external portion of cabinet with the internal heat of cabinet, the cooperation exhaust fan, the internal air flow speed of cabinet accelerates, thereby further make the internal temperature reduction of cabinet, utilize dry box to adsorb the internal moisture of cabinet, keep the internal drying of cabinet, improve the humidity resistance of the cabinet body, thereby avoid the too high temperature or the too high problem that can make the internal electrical component of cabinet damage of humidity, the normal operating of cubical switchboard has been guaranteed.
2. This intelligence heat dissipation type height cubical switchboard, through setting up connecting plate and movable rod, at expanding spring, the cooperation of movable block and stopper is used down, when needs overhaul the electrical component on the first division board, through the pulling movable rod, make the movable rod keep away from first slot, thereby be convenient for dismantle first division board from the inside of the cabinet body get off, when needs overhaul the electrical component on the second division board, pull the movable rod to the below of second division board once more, extract the inserted bar from the inside of second slot simultaneously, and then dismantle the second division board from the inside of the cabinet body, and then be convenient for maintain the electrical component on first division board and the second division board, and is simple in operation, and the labor intensity of staff is reduced, and the work efficiency is improved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a front cross-sectional view of the present invention;
FIG. 3 is a partially enlarged view of the portion A in FIG. 2 according to the present invention;
FIG. 4 is a partially enlarged view of the portion B shown in FIG. 2 according to the present invention;
FIG. 5 is a front cross-sectional view of the drying box of the present invention;
fig. 6 is a schematic structural view of a drawing plate in the invention.
In the figure: 1. a cabinet body; 2. a cabinet door; 201. an observation window; 3. a vent pipe; 31. a filter screen; 32. an exhaust fan; 4. a heat radiation fan; 5. a support plate; 51. a through hole; 6. a connecting plate; 7. a first jack; 8. a movable rod; 81. connecting blocks; 9. a groove; 10. a tension spring; 11. a movable block; 12. a limiting block; 13. a first partition plate; 131. a first slot; 14. an electrical component; 15. a second partition plate; 16. inserting a rod; 17. a second slot; 18. drying the box; 181. an air outlet; 19. a drawing plate; 191. a connecting spring; 192. an arc-shaped clamping block; 193. and placing the net.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the invention discloses an intelligent heat dissipation type high-low switch cabinet, which comprises a cabinet body 1, wherein the front surface of the cabinet body 1 is hinged to a cabinet door 2 through a hinge, ventilation pipes 3 are arranged on the inner walls of two sides of the cabinet body 1, the number of the ventilation pipes 3 is four, filter screens 31 are arranged at openings of the four ventilation pipes 3 on the surface of the cabinet body 1, exhaust fans 32 are fixedly arranged inside the ventilation pipes 3, a heat dissipation fan 4 is fixedly arranged at the top of the inner cavity of the cabinet body 1, a supporting plate 5 is arranged inside the cabinet body 1, the upper surface of the supporting plate 5 is fixedly connected with a connecting plate 6, a first jack 7 is arranged on the upper surface of the connecting plate 6, a movable rod 8 is movably connected inside the first jack 7, and a groove 9 is arranged on the inner wall of;
the surface of the movable rod 8 is fixedly connected with a movable block 11, the movable block 11 is movably connected inside the groove 9, the inner wall of the groove 9 is fixedly connected with a limiting block 12, the limiting block 12 is positioned above the movable block 11, the lower surface of the movable block 11 is fixedly connected with an expansion spring 10, the other end of the expansion spring 10 is fixedly connected with the bottom of the inner wall of the groove 9, a second partition plate 15 and a first partition plate 13 are sequentially arranged above the supporting plate 5 and positioned inside the cabinet body 1 from bottom to top, the top end of the movable rod 8 penetrates through the second partition plate 15, extends to the upper side of the second partition plate 15 and is inserted into a first slot 131 inside the first partition plate 13, and the upper surfaces of the first partition plate 13 and the second partition plate 15 are both provided with an electrical element 14;
the equal fixedly connected with inserted bar 16 in both sides of second division board 15 upper surface, two the one end that second division board 15 was kept away from to inserted bar 16 is pegged graft in the second slot 17 of cabinet body 1 inner wall both sides, the logical groove with 8 looks adaptations of movable rod is all seted up to the inside of backup pad 5 and second division board 15, the dry box 18 of bottom fixedly connected with of the cabinet body 1, the inside swing joint of dry box 18 has pull board 19, the equal fixedly connected with connecting spring 191 in both sides of pull board 19 inner wall, the one end fixedly connected with arc clamp splice 192 of pull board 19 inner wall is kept away from to connecting spring 191, one side fixedly connected with that connecting spring 191 was kept away from to arc clamp splice 192 places net 193.
Specifically, the front of the cabinet door 2 is provided with an observation window 201, and the observation window 201 is a tempered glass observation window.
In this embodiment, the setting of observation window 201 makes things convenient for the staff to observe the inside of the cabinet body 1.
Specifically, the bottom end of the movable rod 8 penetrates and extends to the lower part of the support plate 5 and is fixedly connected with a connecting block 81.
In this embodiment, the setting of connecting block 81 makes things convenient for operating personnel pulling movable rod 8 to be convenient for dismantle first division board 13 and second division board 15 from the inside of the cabinet body 1.
Specifically, through holes 51 are formed in the support plate 5, and the number of the through holes 51 is four.
In this embodiment, the arrangement of the through hole 51 facilitates the air flow inside the cabinet 1, thereby improving the heat dissipation effect inside the cabinet 1.
Specifically, there is the apron in the front of dry box 18 through the hinge, venthole 181 has been seted up to the upper surface of dry box 18, and the surface of cabinet door 2 and apron all is provided with the handle.
In this embodiment, the arrangement of the drying box 18 utilizes the silica gel particles inside the drying box 18 to adsorb the moisture in the cabinet body 1, and the cabinet body 1 is kept dry.
The working principle and the using process of the invention are as follows: when the cabinet is used, the heat dissipation fan 4 and the exhaust fan 32 are started, the heat in the cabinet body 1 is conducted to the outside of the cabinet body 1 by the ventilation pipe 3 and the heat dissipation fan 4, the exhaust fan 32 is matched to accelerate the air flow speed in the cabinet body 1, so that the temperature in the cabinet body 1 is reduced, the moisture in the cabinet body 1 is adsorbed by the silica gel particles on the placing net 193 in the drying box 18, the cabinet body 1 is kept dry, when the electric element 14 in the cabinet body 1 needs to be overhauled, the cabinet door 2 is opened, the connecting block 81 is held to pull the movable rod 8 downwards, at the moment, the telescopic spring 10 is compressed, the movable block 11 is driven to move in the groove 9, so that the movable rod 8 is separated from the first slot 131, the first partition plate 13 is detached from the inside of the cabinet body 1, when the electric element 14 on the second partition plate 15 needs to be overhauled, the movable rod 8 is pulled to the lower part of, meanwhile, the insertion rod 16 is pulled out from the inside of the second insertion slot 17, so that the second partition plate 15 is detached from the inside of the cabinet body 1, the electric element 14 on the second partition plate 15 is overhauled, and the operation is convenient.
To sum up, the intelligent heat dissipation type high-low switch cabinet is provided with the ventilation pipe 3, the exhaust fan 32 and the heat dissipation fan 4, the ventilation pipe 3 and the heat dissipation fan 4 are used for guiding heat in the cabinet body 1 to the outside of the cabinet body 1, the exhaust fan 32 is matched, the air flow speed in the cabinet body 1 is accelerated, so that the temperature in the cabinet body 1 is further reduced, the drying box 18 is used for adsorbing moisture in the cabinet body 1, the dryness in the cabinet body 1 is kept, the moisture resistance of the cabinet body 1 is improved, the problem that the electrical component 14 in the cabinet body 1 is damaged due to overhigh temperature or overhigh humidity is solved, and the normal operation of the switch cabinet is ensured; through setting up connecting plate 6 and movable rod 8, at expanding spring 10, under the cooperation of movable block 11 and stopper 12 is used, when needs overhaul electric component 14 on the first division board 13, through pulling movable rod 8, make movable rod 8 keep away from first slot 131, thereby be convenient for dismantle first division board 13 from the inside of the cabinet body 1, when needs overhaul electric component 14 on the second division board 15, draw movable rod 8 to the below of second division board 15 once more, extract inserted bar 16 from the inside of second slot 17 simultaneously, and then dismantle second division board 15 from the inside of the cabinet body 1, and then be convenient for maintain electric component 14 on first division board 13 and the second division board 15, and is simple in operation, reduce staff's intensity of labour, and the work efficiency is improved.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides an intelligence heat dissipation type height cubical switchboard, includes the cabinet body (1), its characterized in that: the front surface of the cabinet body (1) is hinged with a cabinet door (2) through a hinge, the inner walls of the two sides of the cabinet body (1) are respectively provided with a ventilation pipe (3), the number of the ventilation pipes (3) is four, and filter screens (31) are arranged at the openings of the four ventilating pipes (3) on the surface of the cabinet body (1), an exhaust fan (32) is fixedly arranged inside the ventilation pipe (3), a heat radiation fan (4) is fixedly arranged at the top of the inner cavity of the cabinet body (1), a supporting plate (5) is arranged inside the cabinet body (1), the upper surface of the supporting plate (5) is fixedly connected with a connecting plate (6), a first jack (7) is formed in the upper surface of the connecting plate (6), a movable rod (8) is movably connected inside the first jack (7), and a groove (9) is formed in the inner wall of the first jack (7);
the surface of the movable rod (8) is fixedly connected with a movable block (11), the movable block (11) is movably connected to the inside of the groove (9), the inner wall of the groove (9) is fixedly connected with a limiting block (12), the limiting block (12) is located above the movable block (11), the lower surface of the movable block (11) is fixedly connected with an expansion spring (10), the other end of the expansion spring (10) is fixedly connected with the bottom of the inner wall of the groove (9), the upper portion of the supporting plate (5) is located inside the cabinet body (1) and is sequentially provided with a second partition plate (15) and a first partition plate (13) from bottom to top, and the top end of the movable rod (8) penetrates through the second partition plate (15), extends to the upper portion of the second partition plate (15) and is inserted into a first slot (131) in the first partition plate (13);
the equal fixedly connected with inserted bar (16) in both sides of second division board (15) upper surface, two the one end that second division board (15) were kept away from in second slot (17) of the cabinet body (1) inner wall both sides is pegged graft in inserted bar (16), the dry box of bottom fixedly connected with (18) of the cabinet body (1), the inside swing joint of dry box (18) has pull board (19), the equal fixedly connected with coupling spring (191) in both sides of pull board (19) inner wall, the one end fixedly connected with arc clamp splice (192) of pull board (19) inner wall is kept away from in coupling spring (191), one side fixedly connected with that coupling spring (191) were kept away from in arc clamp splice (192) places net (193).
2. The intelligent heat dissipation type high-low switch cabinet according to claim 1, characterized in that: the front of the cabinet door (2) is provided with an observation window (201), and the observation window (201) is a toughened glass observation window.
3. The intelligent heat dissipation type high-low switch cabinet according to claim 1, characterized in that: the bottom end of the movable rod (8) penetrates through and extends to the lower part of the supporting plate (5) and is fixedly connected with a connecting block (81).
4. The intelligent heat dissipation type high-low switch cabinet according to claim 1, characterized in that: through holes (51) are formed in the supporting plate (5), and the number of the through holes (51) is four.
5. The intelligent heat dissipation type high-low switch cabinet according to claim 1, characterized in that: the front of drying box (18) has the apron through the hinge, venthole (181) have been seted up to the upper surface of drying box (18), and the surface of cabinet door (2) and apron all is provided with the handle.
6. The intelligent heat dissipation type high-low switch cabinet according to claim 1, characterized in that: and the upper surfaces of the first partition plate (13) and the second partition plate (15) are provided with electric elements (14).
7. The intelligent heat dissipation type high-low switch cabinet according to claim 1, characterized in that: the inside of backup pad (5) and second division board (15) all seted up with the logical groove of movable rod (8) looks adaptation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911108659.8A CN110797763A (en) | 2019-11-13 | 2019-11-13 | Intelligent heat dissipation type high-low switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911108659.8A CN110797763A (en) | 2019-11-13 | 2019-11-13 | Intelligent heat dissipation type high-low switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN110797763A true CN110797763A (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911108659.8A Pending CN110797763A (en) | 2019-11-13 | 2019-11-13 | Intelligent heat dissipation type high-low switch cabinet |
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| CN (1) | CN110797763A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111275878A (en) * | 2020-03-11 | 2020-06-12 | 全南英创电子有限公司 | Currency detection magnetic head and processing method thereof |
| CN111707051A (en) * | 2020-06-23 | 2020-09-25 | 贵州凯宏汇达冷却系统有限公司 | Novel open intelligent liquid cooling source |
| CN112188782A (en) * | 2020-10-29 | 2021-01-05 | 广东电网有限责任公司东莞供电局 | High-voltage electric appliance control combination cabinet |
| CN112636221A (en) * | 2020-12-29 | 2021-04-09 | 广东海洋大学 | Automatic temperature control detects switch board for electrical engineering based on thing networking |
| CN113368591A (en) * | 2021-06-07 | 2021-09-10 | 泰州市宏泰电力设备有限公司 | Adjusting device of vacuum oil filter power |
| CN117317843A (en) * | 2023-11-29 | 2023-12-29 | 南方电网调峰调频发电有限公司信息通信分公司 | Portable electrical equipment rack convenient to overhaul |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111275878A (en) * | 2020-03-11 | 2020-06-12 | 全南英创电子有限公司 | Currency detection magnetic head and processing method thereof |
| CN111707051A (en) * | 2020-06-23 | 2020-09-25 | 贵州凯宏汇达冷却系统有限公司 | Novel open intelligent liquid cooling source |
| CN112188782A (en) * | 2020-10-29 | 2021-01-05 | 广东电网有限责任公司东莞供电局 | High-voltage electric appliance control combination cabinet |
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| CN113368591A (en) * | 2021-06-07 | 2021-09-10 | 泰州市宏泰电力设备有限公司 | Adjusting device of vacuum oil filter power |
| CN117317843A (en) * | 2023-11-29 | 2023-12-29 | 南方电网调峰调频发电有限公司信息通信分公司 | Portable electrical equipment rack convenient to overhaul |
| CN117317843B (en) * | 2023-11-29 | 2024-01-30 | 南方电网调峰调频发电有限公司信息通信分公司 | Portable electrical equipment rack convenient to overhaul |
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Application publication date: 20200214 |
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| WD01 | Invention patent application deemed withdrawn after publication |