CN111912520B - Hydroelectric generating set vibration throw monitoring and protecting device - Google Patents
Hydroelectric generating set vibration throw monitoring and protecting device Download PDFInfo
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- CN111912520B CN111912520B CN202010794928.7A CN202010794928A CN111912520B CN 111912520 B CN111912520 B CN 111912520B CN 202010794928 A CN202010794928 A CN 202010794928A CN 111912520 B CN111912520 B CN 111912520B
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- heat dissipation
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- inner cavity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The invention relates to the technical field of hydroelectric power generation, in particular to a hydroelectric generating set vibration swing monitoring and protecting device which comprises a shell, wherein fixing seats are bolted on the left side and the right side of the bottom of the shell, a top plate is bolted on the top of the shell, a through groove is formed in the bottom of an inner cavity of the shell, and a heat dissipation box is bolted on the bottom of the shell; according to the invention, through the arrangement of the through groove, the heat dissipation box, the clamping mechanism, the buffering mechanism, the heat dissipation fins, the supporting plate and the heat dissipation mechanism, the vibration pendulum monitoring device has the advantages of convenience in maintenance, high safety and stability, capability of quickly fixing the monitoring device, good heat dissipation effect and capability of ensuring long-term stable work of the monitoring device, and solves the problems that the vibration pendulum monitoring device is lack of a protection structure, the safety and stability of the monitoring device is poor, the monitoring device is easily damaged by foreign objects due to collision, and the monitoring device cannot quickly dissipate heat generated by work, so that an error exists in a monitoring result.
Description
Technical Field
The invention relates to the technical field of hydroelectric generation, in particular to a hydroelectric generating set vibration swing monitoring and protecting device.
Background
Hydroelectric generating sets are also known as "hydro-turbo sets". The power generation unit formed by combining each water turbine and a matched generator in the hydropower station is main power equipment for generating electric energy in the hydropower station. When water flow introduced by the hydropower station passes through the water turbine, the water energy is converted into mechanical energy for driving the machinery to rotate, and the generator converts the mechanical energy into electric energy for output. The hydroelectric generating set carries out on-line monitoring on parameters representing the stability of the running hydroelectric generating set such as vibration, throw, pressure pulsation and the like through vibration throw monitoring equipment, obtains various stability parameter data, analyzes the current running state of the hydroelectric generating set according to the data to monitor the slow change process of the defects of the hydroelectric generating set, so as to provide good basis for the state maintenance of the hydroelectric generating set and provide reliable information for the running scheduling of the hydroelectric generating set.
The vibration throw monitoring facilities that present hydro-power generating unit used lacks protective structure for monitoring facilities's safety stability is relatively poor, receive the foreign object striking easily and damage, and the heat that monitoring facilities work produced can't scatter and disappear fast, thereby can lead to the monitoring result to have the error, the operation scheduling work of giving the unit has brought inconvenience, we propose for this reason one kind be convenient for maintain, safety stability is high, can carry out quick fixed to monitoring facilities, and the radiating effect is better, guarantee can monitor the long-term stable protection device who works of equipment and solve this problem.
Disclosure of Invention
The invention aims to provide a vibration swing monitoring and protecting device of a hydroelectric generating set, which has the advantages of convenience in maintenance, high safety and stability, capability of quickly fixing monitoring equipment, better heat dissipation effect and capability of ensuring the long-term stable work of the monitoring equipment, and solves the problems that the monitoring equipment is poor in safety and stability, is easy to be damaged by foreign object impact and cannot quickly dissipate heat generated by the working of the monitoring equipment, so that the monitoring result has errors due to the lack of a protecting structure of the vibration swing monitoring equipment.
In order to achieve the purpose, the invention provides the following technical scheme: a vibration swing monitoring and protecting device of a hydroelectric generating set comprises a shell, wherein fixing seats are bolted on the left side and the right side of the bottom of the shell, a top plate is bolted on the top of the shell, a through groove is formed in the bottom of an inner cavity of the shell, a heat dissipation box is bolted on the bottom of the shell, clamping mechanisms are arranged on the left side and the right side of the inner cavity of the shell and are symmetrically distributed, a buffer mechanism is arranged inside the clamping mechanisms, mounting plates are bolted on the front side and the rear side of the bottom of the inner cavity of the heat dissipation box, heat dissipation fins are arranged on the top of the mounting plates, a supporting plate is arranged in the inner cavity of the heat dissipation box, limiting grooves are formed in the inner wall of the heat dissipation box and are respectively positioned on the left side and the right side of the inner cavity of the heat dissipation box and are symmetrically distributed, limiting blocks are bolted on the left side and the right side of the supporting plate and are positioned inside the limiting grooves, the limiting block is connected with the inner wall of the limiting groove in a sliding mode, the bottom of the heat dissipation box is provided with a circular groove, the circular groove is located between the mounting plates, the heat dissipation mechanism is embedded in the circular groove, and the back face of the shell is provided with a wiring groove;
the clamping mechanism comprises a threaded rod, a rotary plate, movable plates and positioning plates, the threaded rod penetrates through the inner cavity of the shell and is in threaded connection with the shell, the rotary plate is located on the outer side of the shell and is in bolted connection with the threaded rod, the movable plates are located in the inner cavity of the shell, the threaded rod is in rotary connection with the movable plates through bearing seats, the positioning plates are located between the movable plates, and the positioning plates are symmetrically distributed;
the buffer mechanism comprises a fixed frame, a compression spring, a limiting plate and a connecting rod, the fixed frame is embedded in the surface of the movable plate, the compression spring and the limiting plate are both positioned in an inner cavity of the fixed frame, the compression spring is bolted with the limiting plate, the limiting plate is slidably connected with the inner wall of the fixed frame, the connecting rod is bolted to one side of the limiting plate, which is far away from the compression spring, and the connecting rod is bolted with the positioning plate;
the inner wall of the shell is provided with strip-shaped grooves, the strip-shaped grooves are respectively positioned on the front side and the rear side of the positioning plate and are symmetrically distributed, sliding blocks are bolted to the front side and the rear side of the positioning plate, and the sliding blocks are positioned inside the strip-shaped grooves and are in sliding connection with the inner wall of the strip-shaped grooves;
the protection pads are bonded on the opposite sides of the positioning plates, the protection pads are anti-skidding rubber pads, a handle is bolted to one end, far away from the threaded rod, of the rotary table, and the handle is rotatably connected with the rotary table.
Preferably, the heat dissipation mechanism includes installing frame, motor and flabellum, the installing frame is located the inside of circular slot, and the bolt connects between installing frame and the heat dissipation case, motor fixed mounting is in the inner chamber of installing frame, the flabellum be located the inside of installing frame and with the output shaft of motor between the bolt connect.
Preferably, the left side and the right side of the bottom of the mounting frame are fixedly provided with fixed blocks, the fixed blocks are bolted with the heat dissipation box, and the bottom of the inner cavity of the mounting frame is bolted with an isolation net.
Preferably, the tops of the front side and the rear side of the heat dissipation box are all bolted with connecting blocks, the connecting blocks are symmetrically distributed, connecting holes are formed in the surfaces of the connecting blocks, and threads are arranged on the inner walls of the connecting holes.
Preferably, the heat dissipation box is communicated with the shell, the supporting plates are located at the bottom of the through groove, and the supporting plates are located on the front side and the rear side of the top of the inner cavity of the heat dissipation box respectively.
Preferably, the number of the radiating fins is a plurality, the radiating fins are uniformly arranged, and the surfaces of the radiating fins are coated with heat-conducting silicone grease.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through the arrangement of the through groove, the heat dissipation box, the clamping mechanism, the buffering mechanism, the heat dissipation fins, the supporting plate and the heat dissipation mechanism, the vibration pendulum monitoring device has the advantages of convenience in maintenance, high safety and stability, capability of quickly fixing the monitoring device, good heat dissipation effect and capability of ensuring long-term stable work of the monitoring device, and solves the problems that the vibration pendulum monitoring device is lack of a protection structure, the safety and stability of the monitoring device is poor, the monitoring device is easily damaged by foreign objects due to collision, and the monitoring device cannot quickly dissipate heat generated by work, so that an error exists in a monitoring result.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of the invention at A in FIG. 1;
FIG. 3 is a schematic cross-sectional view of a heat dissipation box according to the present invention;
FIG. 4 is a schematic top view of the clamping mechanism of the present invention;
FIG. 5 is a schematic top view of a heat dissipation box according to the present invention;
FIG. 6 is a perspective view of the heat dissipation box of the present invention.
In the figure: 1. a housing; 2. a fixed seat; 3. a top plate; 4. a through groove; 5. a heat dissipation box; 6. a clamping mechanism; 61. a threaded rod; 62. a turntable; 63. a movable plate; 64. positioning a plate; 7. a buffer mechanism; 71. a fixing frame; 72. a compression spring; 73. a limiting plate; 74. a connecting rod; 8. mounting a plate; 9. a heat dissipating fin; 10. a support plate; 11. a limiting groove; 12. a limiting block; 13. a circular groove; 14. a heat dissipation mechanism; 141. installing a frame; 142. a motor; 143. a fan blade; 15. a wiring slot; 16. a strip-shaped groove; 17. a slider; 18. a protection pad; 19. a handle; 20. a fixed block; 21. an isolation net; 22. connecting blocks; 23. and connecting the holes.
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, a vibration swing monitoring and protecting device for a hydroelectric generating set comprises a housing 1, fixing bases 2 are bolted on the left and right sides of the bottom of the housing 1, a top plate 3 is bolted on the top of the housing 1, a through groove 4 is formed in the bottom of an inner cavity of the housing 1, a heat dissipation box 5 is bolted on the bottom of the housing 1, clamping mechanisms 6 are arranged on the left and right sides of the inner cavity of the housing 1, the clamping mechanisms 6 are symmetrically distributed, a buffer mechanism 7 is arranged inside the clamping mechanisms 6, mounting plates 8 are bolted on the front and back sides of the bottom of the inner cavity of the heat dissipation box 5, a heat dissipation fin 9 is arranged on the top of the mounting plate 8, a support plate 10 is arranged in the inner cavity of the heat dissipation box 5, limit grooves 11 are formed in the inner wall of the heat dissipation box 5, the limit grooves 11 are respectively located on the left and right sides of the inner cavity of the heat dissipation box 5, the limit grooves 11 are symmetrically distributed, limit blocks 12 are bolted on the left and right sides of the support plate 10, the limiting block 12 is positioned inside the limiting groove 11, the limiting block 12 is connected with the inner wall of the limiting groove 11 in a sliding manner, the bottom of the heat dissipation box 5 is provided with a circular groove 13, the circular groove 13 is positioned between the mounting plates 8, the heat dissipation mechanism 14 is embedded in the circular groove 13, the back of the shell 1 is provided with a wiring groove 15, through the arrangement of the through groove 4, the heat dissipation box 5, the clamping mechanism 6, the buffer mechanism 7, the heat dissipation fins 9, the support plate 10 and the heat dissipation mechanism 14, the device has the advantages of convenient maintenance, high safety and stability, can quickly fix the monitoring equipment, has better heat dissipation effect, ensures the monitoring equipment to stably work for a long time, solves the problem that the vibration swing monitoring equipment is poor in safety and stability and easy to be damaged by foreign objects due to the lack of a protection structure, and the heat generated by the work of the monitoring equipment can not be quickly dissipated, so that the problem of error of the monitoring result can be caused.
In this embodiment, fixture 6 includes threaded rod 61, carousel 62, fly leaf 63 and locating plate 64, threaded rod 61 runs through to the inner chamber of casing 1, and threaded connection between threaded rod 61 and the casing 1, carousel 62 be located the outside of casing 1 and with threaded rod 61 between the bolt joint, fly leaf 63 is located the inner chamber of casing 1, threaded rod 61 passes through the bearing frame and is connected with rotating between the fly leaf 63, locating plate 64 is located between the fly leaf 63, and locating plate 64 is the symmetric distribution, through threaded rod 61, carousel 62, fly leaf 63 and locating plate 64's setting, can fix monitoring facilities, thereby can increase monitoring facilities's safety and stability nature.
In this embodiment, buffer gear 7 includes fixed frame 71, compression spring 72, limiting plate 73 and connecting rod 74, fixed frame 71 inlays the surface of locating fly leaf 63, compression spring 72 and limiting plate 73 all are located the inner chamber of fixed frame 71, and the bolt joint between compression spring 72 and the limiting plate 73, the inner wall sliding connection of limiting plate 73 and fixed frame 71, connecting rod 74 bolt joint is in the one side that compression spring 72 was kept away from to limiting plate 73, and the bolt joint between connecting rod 74 and locating plate 64, through fixed frame 71, compression spring 72, the setting of limiting plate 73 and connecting rod 74, can effectively increase the buffering shock attenuation effect of locating plate 64, avoid causing the damage to monitoring facilities.
In this embodiment, the heat dissipation mechanism 14 includes the mounting frame 141, the motor 142 and the fan blades 143, the mounting frame 141 is located inside the circular groove 13, and the bolt is connected between the mounting frame 141 and the heat dissipation box 5, the motor 142 is fixedly mounted in the inner cavity of the mounting frame 141, the fan blades 143 are located inside the mounting frame 141 and are connected with the output shaft of the motor 142 in a bolt manner, through the arrangement of the mounting frame 141, the motor 142 and the fan blades 143, the air flow rate inside the heat dissipation box 5 can be accelerated, so that the heat dissipation performance of the monitoring device can be increased, and the monitoring device is prevented from being influenced by high temperature and working normally.
In this embodiment, strip groove 16 has been seted up to casing 1's inner wall, and strip groove 16 is located the front and back both sides of locating plate 64 respectively, and strip groove 16 is the symmetric distribution, and the equal bolted connection in both sides has sliding block 17 around locating plate 64, and sliding block 17 is located strip groove 16's inside and with strip groove 16's inner wall sliding connection, through strip groove 16 and sliding block 17's setting, can play the effect of direction, prevents that the skew from appearing in locating plate 64's position.
In this embodiment, the protection pad 18 has all been bonded to the opposite one side of locating plate 64, and protection pad 18 is the antiskid rubber pad, and the one end bolt that threaded rod 61 was kept away from to carousel 62 has handle 19, and rotates between handle 19 and the carousel 62 to be connected, through the setting of protection pad 18 and handle 19, can increase monitoring facilities's fixed effect, has brought the facility for operating personnel's use.
In this embodiment, the fixing blocks 20 are fixedly mounted on the left side and the right side of the bottom of the mounting frame 141, the fixing blocks 20 are bolted to the heat dissipation box 5, the isolation net 21 is bolted to the bottom of the inner cavity of the mounting frame 141, and the fixing blocks 20 and the isolation net 21 are arranged, so that the safety of the protection device can be improved, and foreign objects can be prevented from entering the mounting frame 141 and damaging the fan blades 143.
In this embodiment, the top of both sides all bolted connection has connecting block 22 around heat dissipation case 5, and connecting block 22 is the symmetric distribution, and connecting hole 23 has been seted up on connecting block 22's surface, and the inner wall of connecting hole 23 is provided with the screw thread, through the setting of connecting block 22 and connecting hole 23, is convenient for install and dismantle heat dissipation case 5, and then has reduced protection device's the maintenance degree of difficulty.
In this embodiment, the heat dissipation box 5 is communicated with the housing 1, the support plate 10 is located at the bottom of the through groove 4, the support plate 10 is located at the front side and the rear side of the top of the inner cavity of the heat dissipation box 5, and the monitoring device can be supported and fixed through the special arrangement of the support plate 10.
In this embodiment, the number of the heat dissipation fins 9 is a plurality of, and the heat dissipation fins 9 are evenly arranged, and the surface of the heat dissipation fins 9 is coated with the heat conductive silicone grease, so that the heat dissipation effect of the heat dissipation box 5 can be increased by the arrangement of the heat dissipation fins 9, and the heat is prevented from being accumulated in the inner cavity of the heat dissipation box 5.
The working principle is as follows: when the device is used, the monitoring device is placed at the top of the supporting plate 10, then the handles 19 at the two sides of the shell 1 are adjusted, the handles 19 drive the rotating disc 62 to rotate, then the threaded rod 61 rotates along with the rotating disc 62, the movable plates 63 can be driven to move in opposite directions due to the threaded connection between the threaded rod 61 and the shell 1, then the positioning plate 64 and the movable plates 63 synchronously move and the distance between the positioning plates 64 is gradually reduced, at the moment, the sliding block 17 slides along the inside of the strip-shaped groove 16, the stability of the positioning plate 64 can be effectively improved, the displacement track of the positioning plate 64 is prevented from being deviated, the positioning plate 64 continuously moves until the protective pad 18 is attached to the monitoring device, the positioning plate 64 extrudes the connecting rod 74, the connecting rod 74 can push the limiting plate 73 to shorten the compression spring 72, and meanwhile, the counter-acting force of the compression spring 72 can enable the positioning plate 64 and the monitoring device to keep a mutually extruded trend, and then can fix monitoring facilities, guarantee that monitoring facilities has higher stability, monitoring facilities can produce a large amount of heats when lasting the work, radiating fin 9 conducts monitoring facilities's heat to the inside of heat dissipation case 5, motor 142 work can drive flabellum 143 and rotate afterwards, thereby can make the inside negative pressure that forms of heat dissipation case 5 with the inside air escape of heat dissipation case 5, external cold air gets into the inside of casing 1 afterwards, and then can accelerate the inside circulation of air of casing 1 and heat dissipation case 5, reach the purpose of heat dissipation cooling, guarantee that monitoring facilities can long-term stable work.
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 (6)
1. The utility model provides a hydroelectric generating set vibration throw monitoring and protection device, includes casing (1), its characterized in that: the heat dissipation device is characterized in that fixing seats (2) are bolted on the left side and the right side of the bottom of the shell (1), a top plate (3) is bolted on the top of the shell (1), a through groove (4) is formed in the bottom of an inner cavity of the shell (1), a heat dissipation box (5) is bolted on the bottom of the shell (1), clamping mechanisms (6) are arranged on the left side and the right side of the inner cavity of the shell (1), the clamping mechanisms (6) are symmetrically distributed, a buffer mechanism (7) is arranged inside the clamping mechanisms (6), mounting plates (8) are bolted on the front side and the rear side of the bottom of the inner cavity of the heat dissipation box (5), heat dissipation fins (9) are arranged on the top of the mounting plates (8), a support plate (10) is arranged in the inner cavity of the heat dissipation box (5), a limit groove (11) is formed in the inner wall of the heat dissipation box (5), and the limit grooves (11) are respectively located on the left side and the right side of the inner cavity of the heat dissipation box (5), the limiting grooves (11) are symmetrically distributed, limiting blocks (12) are bolted to the left side and the right side of the supporting plate (10), the limiting blocks (12) are located inside the limiting grooves (11), the limiting blocks (12) are connected with the inner walls of the limiting grooves (11) in a sliding mode, circular grooves (13) are formed in the bottom of the heat dissipation box (5), the circular grooves (13) are located between the mounting plates (8), a heat dissipation mechanism (14) is embedded inside the circular grooves (13), and wiring grooves (15) are formed in the back face of the shell (1);
the clamping mechanism (6) comprises a threaded rod (61), a rotary table (62), movable plates (63) and positioning plates (64), the threaded rod (61) penetrates through the inner cavity of the shell (1), the threaded rod (61) is in threaded connection with the shell (1), the rotary table (62) is located on the outer side of the shell (1) and is in bolted connection with the threaded rod (61), the movable plates (63) are located in the inner cavity of the shell (1), the threaded rod (61) is in rotary connection with the movable plates (63) through a bearing seat, the positioning plates (64) are located between the movable plates (63), and the positioning plates (64) are symmetrically distributed;
the buffer mechanism (7) comprises a fixed frame (71), a compression spring (72), a limit plate (73) and a connecting rod (74), the fixed frame (71) is embedded on the surface of the movable plate (63), the compression spring (72) and the limit plate (73) are both positioned in an inner cavity of the fixed frame (71), the compression spring (72) and the limit plate (73) are bolted, the limit plate (73) is in sliding connection with the inner wall of the fixed frame (71), the connecting rod (74) is bolted to one side, away from the compression spring (72), of the limit plate (73), and the connecting rod (74) and the limit plate (64) are bolted;
a strip-shaped groove (16) is formed in the inner wall of the shell (1), the strip-shaped groove (16) is respectively located on the front side and the rear side of the positioning plate (64), the strip-shaped groove (16) is symmetrically distributed, sliding blocks (17) are bolted to the front side and the rear side of the positioning plate (64), and the sliding blocks (17) are located inside the strip-shaped groove (16) and are in sliding connection with the inner wall of the strip-shaped groove (16);
the protective pads (18) are bonded on the opposite sides of the positioning plates (64), the protective pads (18) are anti-skid rubber pads, a handle (19) is bolted to one end, far away from the threaded rod (61), of the rotary table (62), and the handle (19) is rotatably connected with the rotary table (62).
2. The hydroelectric generating set vibration throw monitoring and protecting device according to claim 1, wherein: the heat dissipation mechanism (14) comprises an installation frame (141), a motor (142) and fan blades (143), the installation frame (141) is located inside the circular groove (13), the installation frame (141) and the heat dissipation box (5) are connected in a bolted mode, the motor (142) is fixedly installed in an inner cavity of the installation frame (141), and the fan blades (143) are located inside the installation frame (141) and connected with an output shaft of the motor (142) in a bolted mode.
3. The hydroelectric generating set vibration throw monitoring and protecting device according to claim 2, wherein: the left side and the right side of the bottom of the mounting frame (141) are fixedly provided with fixing blocks (20), the fixing blocks (20) are bolted with the heat dissipation box (5), and the bottom of the inner cavity of the mounting frame (141) is bolted with an isolation net (21).
4. The hydroelectric generating set vibration throw monitoring and protecting device according to claim 1, wherein: the top of both sides all bolted connection has connecting block (22) around heat dissipation case (5), and connecting block (22) are the symmetric distribution, connecting hole (23) have been seted up on the surface of connecting block (22), the inner wall of connecting hole (23) is provided with the screw thread.
5. The hydroelectric generating set vibration throw monitoring and protecting device according to claim 1, wherein: the heat dissipation box (5) is communicated with the shell (1), the supporting plate (10) is located at the bottom of the through groove (4), and the supporting plate (10) is located on the front side and the rear side of the top of an inner cavity of the heat dissipation box (5) respectively.
6. The hydroelectric generating set vibration throw monitoring and protecting device according to claim 1, wherein: the number of the radiating fins (9) is a plurality, the radiating fins (9) are uniformly arranged, and heat-conducting silicone grease is coated on the surfaces of the radiating fins (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010794928.7A CN111912520B (en) | 2020-08-10 | 2020-08-10 | Hydroelectric generating set vibration throw monitoring and protecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010794928.7A CN111912520B (en) | 2020-08-10 | 2020-08-10 | Hydroelectric generating set vibration throw monitoring and protecting device |
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| Publication Number | Publication Date |
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| CN111912520A CN111912520A (en) | 2020-11-10 |
| CN111912520B true CN111912520B (en) | 2022-03-08 |
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| CN202010794928.7A Active CN111912520B (en) | 2020-08-10 | 2020-08-10 | Hydroelectric generating set vibration throw monitoring and protecting device |
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| CN114851101A (en) * | 2021-02-04 | 2022-08-05 | 昆明嘉和科技股份有限公司 | Fixed frock of centrifugal pump body processing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004134952A (en) * | 2002-10-09 | 2004-04-30 | Matsushita Electric Ind Co Ltd | Rotating device |
| CN207977985U (en) * | 2018-03-07 | 2018-10-16 | 深圳市吉比特信息技术有限公司 | A kind of load equalizer with monitoring device |
| CN108427487A (en) * | 2018-05-25 | 2018-08-21 | 郑州天舜电子技术有限公司 | A kind of novel electronic product main frame fixing device for installing |
| CN208300179U (en) * | 2018-06-22 | 2018-12-28 | 南京法丁电子科技有限责任公司 | A kind of microprocessor-based protection measure and control device |
| CN209606580U (en) * | 2019-01-21 | 2019-11-08 | 上海上科电器（集团）有限公司 | A kind of state parameter on-Line Monitor Device of intelligent high-voltage vacuum circuit breaker |
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