CN116234246A - CT secondary side overvoltage protection device - Google Patents
CT secondary side overvoltage protection device Download PDFInfo
- Publication number
- CN116234246A CN116234246A CN202310114744.5A CN202310114744A CN116234246A CN 116234246 A CN116234246 A CN 116234246A CN 202310114744 A CN202310114744 A CN 202310114744A CN 116234246 A CN116234246 A CN 116234246A
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- fixedly connected
- limiting
- plate
- shell
- heat dissipation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/042—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for current transformers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/44—Means for preventing access to live contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0213—Venting apertures; Constructional details thereof
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
Abstract
The invention discloses a CT secondary side overvoltage protection device, which comprises a shell, wherein a partition plate is arranged on the shell, a hollowed-out fixed plate is arranged between the two partition plates, a screw is arranged on the hollowed-out fixed plate, a pressing piece is arranged on the screw, the pressing piece is connected with the hollowed-out fixed plate through a first spring, a heat dissipation mechanism is arranged on the pressing piece, a conducting strip is arranged on the left side of the pressing piece, and the heat dissipation mechanism is used for accelerating the air flow at a wiring terminal of the device and is started when the device is electrified and closed when the device is powered off; the shell is provided with a radiating groove, a ventilation mechanism is arranged in the radiating groove and used for adjusting the size of a ventilation opening of the shell, and the ventilation mechanism is adjusted according to the temperature, when the first lead is fixed by the pressing sheet and the conducting strip and is used by supplying current, the current can enter the metal frame through the second lead, so that the metal frame becomes an electromagnet, and then the metal frame is continuously rotated by virtue of the first magnetic block and the second magnetic block, so that the fan blade rotates to accelerate the air flow, and the heat at the joint can be quickly taken away.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a CT secondary side overvoltage protection device.
Background
The Current Transformer (CT) uses the measurement and control of primary current, and the secondary side of the transformer is in an approximate short circuit state during normal operation, and the output voltage is very low. If the secondary winding is open or the primary winding flows through abnormal current in operation, larger voltage is generated, and damage is easy to occur, at this time, a CT secondary overvoltage protector is needed to be used, and the CT secondary overvoltage protector is mainly used for abnormal overvoltage protection of various CT secondary sides;
the use of CT secondary overvoltage protection ware needs to be connected with current transformer, its connected mode all is through the wire connection terminal, there is the electric current to pass through when the wiring end on the CT secondary overvoltage protection ware is in the use, because the electric current passes through, can lead to junction to produce heat, when the heat surpasss the phenomenon that junction damaged can appear when certain scope, and the heat dissipation of CT secondary overvoltage protection ware self only relies on some louvre passive heat dissipation, the heat dissipation ability of louvre is effective, be unfavorable for the fine heat dissipation of CT secondary overvoltage protection ware.
Disclosure of Invention
The invention aims to provide a CT secondary side overvoltage protection device so as to solve the technical problems.
The invention aims to solve the technical problems, and is realized by adopting the following technical scheme:
the utility model provides a CT secondary side overvoltage protector, includes the casing, fixed mounting has a plurality of baffles on the casing, two adjacent fixedly connected with fretwork fixed plate between the baffle, run through on the fretwork fixed plate and be provided with the through-hole, the inside screw rod that is provided with of through-hole, be provided with the preforming on the screw rod, the preforming rotates with the screw rod to be connected, be connected through first spring between preforming and the fretwork fixed plate, first spring housing is established on the screw rod, be provided with heat dissipation mechanism on the preforming, the preforming left side is provided with the conducting strip, conducting strip and casing fixed connection, all set up the screw groove on conducting strip and the casing, screw groove and screw rod threaded connection;
the heat dissipation mechanism is used for accelerating air flow at the wiring terminal of the device, and is started when the device is electrified and closed when the device is powered off;
the shell is provided with a plurality of radiating grooves, a ventilation mechanism is arranged in each radiating groove, and the ventilation mechanism is used for adjusting the size of a ventilation opening of the shell and adjusting according to the temperature.
Preferably, the heat dissipation mechanism comprises a hollow mounting box, a first magnetic block and a second magnetic block are fixedly connected inside the hollow mounting box, the magnetism of the first magnetic block and that of the second magnetic block are opposite, a metal frame is arranged between the first magnetic block and the second magnetic block, one end of the metal frame is fixedly connected with a second rotating shaft, the second rotating shaft penetrates through the hollow mounting box and is rotationally connected with the hollow mounting box, the second rotating shaft is made of plastic materials, one end of the second rotating shaft, which is located outside the hollow mounting box, is fixedly connected with a fan blade, the other end of the metal frame is fixedly connected with two metal half rings, and two opposite sides of the metal half rings are provided with connecting assemblies.
Preferably, the connecting assembly comprises a fixed box, the fixed box is connected with the hollowed-out mounting box through a fixed column, an electric brush is connected with the fixed box in a sliding manner, the electric brush is connected with the fixed box through a second spring, the electric brush is contacted with the metal semi-ring, a second wire is fixedly connected to the fixed box, one end of the second wire is connected with the electric brush, and the other end of the second wire extends to the lower portion of the pressing sheet to be connected with the conducting strip.
Preferably, the ventilation mechanism comprises an internal thread pipe, the internal thread pipe is located inside the heat dissipation groove, the internal thread pipe is connected with the shell through a positioning column, a heat conduction pipe is connected with the internal thread pipe in a threaded mode, a bimetal spiral sheet is arranged inside the heat conduction pipe, one end of the bimetal spiral sheet is fixedly connected with the heat conduction pipe, the other end of the bimetal spiral sheet is fixedly connected with a first rotating shaft, the first rotating shaft penetrates through the internal thread pipe and is rotationally connected with the internal thread pipe, one end of the first rotating shaft located outside the internal thread pipe is fixedly connected with a rotating plate, heat dissipation plates are symmetrically arranged on the upper side and the lower side of the rotating plate, a plurality of heat dissipation holes are formed in the heat dissipation plates, the heat dissipation plates are fixedly connected with the heat dissipation groove, and the rotating plate is rotationally connected with the heat dissipation plates.
Preferably, the upper side and the lower side of the rotating plate are both provided with first limiting plates, the first limiting plates are fixedly connected with the shell, and the left side and the right side of the rotating plate are both fixedly connected with second limiting plates.
Preferably, the screw is fixedly connected with a hollow protection plate, a groove is formed in the hollow protection plate, the width of the groove is larger than the diameter of the first wire, and the hollow protection plate is in sliding connection with the partition plate.
Preferably, two connecting blocks are fixedly connected to the hollowed-out protection plate, limiting grooves are formed in the left side and the right side of each connecting block, and a plurality of limiting mechanisms are fixedly connected to the shell.
Preferably, the stop gear includes spacing box, spacing box and casing fixed connection, all fixedly connected with spacing pipe on the inside left and right sides inner wall of spacing box, the inside sliding connection of spacing pipe has the slide, the slide is connected with spacing pipe through the third spring, fixedly connected with spacing hemisphere on the slide, spacing hemisphere extends to spacing outside of tubes, spacing hemisphere and spacing groove phase-match.
The beneficial effects of the invention are as follows:
1. when the first lead is fixed between the pressing sheet and the conducting sheet and current is introduced into the pressing sheet and the conducting sheet for use, the current can enter the metal frame through the second lead, so that the metal frame forms a flat electromagnet, and then the metal frame is continuously rotated by virtue of the actions of the first magnetic block and the second magnetic block, so that the fan blade rotates to accelerate the air flow, the heat at the joint can be quickly taken away, the start and stop of the fan blade are related to whether the current is introduced or not, the automatic start during use can be effectively realized, and the automatic closing effect during non-use can be realized.
2. Through ventilation mechanism, can absorb heat with the help of the heat pipe, because the bimetal spiral plate is a combined material that comprises two kinds or multiple metals or other materials that have suitable performance to under the spacing of heat pipe, make it can take place to rotate after being heated, the bimetal spiral plate rotates and can drive first pivot and rotate, first pivot can drive the rotor plate and rotate, thereby open radiating groove part, radiating capacity of radiating groove is greater than the louvre, can increase its radiating capacity, and the bimetal spiral plate is by temperature control, can be according to the high automatic control radiating groove's of temperature opening and closing.
3. Through setting up the fretwork guard plate, can carry out the shutoff with the junction, avoid user and junction touching and appear the electric shock phenomenon, and because preforming and baffle sliding connection, with the help of the effect of first spring again, can make the screw rod face the screw groove on the preforming always, not only avoided screw rod and screw groove to appear the deviation and be unfavorable for the problem of being connected, still carried out spacingly to the screw rod, avoided the screw rod not hard up problem that appears losing to appear appears.
4. Through the fixed connecting block on the fretwork guard plate, insert in the spacing box with the help of the connecting block, make spacing groove and spacing hemisphere joint, can effectually carry out spacing fretwork guard plate and preforming, avoid leading to the screw rod of junction to appear not hard up phenomenon emergence because of vibration or thermal expansion, make it can firm connect first wire.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
FIG. 4 is a schematic diagram showing the connection of the conductive sheet and the hollow protection plate;
FIG. 5 is a schematic diagram of a heat dissipation mechanism according to the present invention;
FIG. 6 is a schematic view of a connection assembly according to the present invention;
FIG. 7 is a schematic view of the ventilation mechanism of the present invention;
fig. 8 is a schematic diagram of a limiting mechanism according to the present invention.
Reference numerals: 1. a housing; 2. hollow protection plates; 3. a screw; 4. a heat dissipation plate; 5. a first limiting plate; 6. a heat radiation hole; 7. a second limiting plate; 8. a rotating plate; 9. a first wire; 10. a limit box; 11. a limiting tube; 12. a connecting block; 13. a conductive sheet; 14. a groove; 15. a hollowed mounting box; 16. tabletting; 17. a first spring; 18. hollowed-out fixing plates; 19. a limit groove; 20. a second spring; 21. a slide plate; 22. a limit hemisphere; 23. positioning columns; 24. an internally threaded tube; 25. a first rotating shaft; 26. bimetallic screw sheets; 27. a heat conduction pipe; 28. a brush; 29. a fixed box; 30. a third spring; 31. a second wire; 32. a metal half ring; 33. a first magnetic block; 34. a metal frame; 35. a fan blade; 36. a second rotating shaft; 37. a partition plate; 38. and a second magnetic block.
Detailed Description
In order that the manner in which the above recited features, objects and advantages of the present invention are obtained, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the invention.
Specific embodiments of the present invention are described below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1 and fig. 4-6, a CT secondary side overvoltage protection device includes a housing 1, a plurality of partition boards 37 are fixedly installed on the housing 1, a hollow fixing plate 18 is fixedly connected between two adjacent partition boards 37, a through hole is formed in the hollow fixing plate 18 in a penetrating manner, a screw 3 is arranged in the through hole, a pressing piece 16 is arranged on the screw 3, the pressing piece 16 is rotationally connected with the screw 3, the pressing piece 16 is connected with the hollow fixing plate 18 through a first spring 17, the first spring 17 is sleeved on the screw 3, a heat dissipation mechanism is arranged on the pressing piece 16, a conductive sheet 13 is arranged on the left side of the pressing piece 16, the conductive sheet 13 is fixedly connected with the housing 1, thread grooves are formed in the conductive sheet 13 and the housing 1, and the thread grooves are in threaded connection with the screw 3;
the heat dissipation mechanism is used for accelerating air flow at the wiring terminal of the device, and is started when the device is electrified and closed when the device is powered off;
the shell 1 is provided with a plurality of radiating grooves, and a ventilation mechanism is arranged in each radiating groove and used for adjusting the size of a ventilation opening of the shell 1 and adjusting according to the temperature;
when the device is needed to be used, the first lead 9 needs to be connected to the device, the connecting end of the first lead 9 is placed on the conducting strip 13, then the screw rod 3 is pressed and rotated to enable the screw rod 3 to be connected with a thread groove on the conducting strip 13, and the movement of the screw rod 3 drives the pressing piece 16 to move, so that the pressing piece 16 clamps the first lead 9;
the heat dissipation mechanism comprises a hollow mounting box 15, a first magnetic block 33 and a second magnetic block 38 are fixedly connected inside the hollow mounting box 15, the magnetism of the first magnetic block 33 and that of the second magnetic block 38 are opposite, a metal frame 34 is arranged between the first magnetic block 33 and the second magnetic block 38, one end of the metal frame 34 is fixedly connected with a second rotating shaft 36, the second rotating shaft 36 penetrates through the hollow mounting box 15 and is rotationally connected with the hollow mounting box 15, the second rotating shaft 36 is made of plastic materials, one end of the second rotating shaft 36 positioned outside the hollow mounting box 15 is fixedly connected with a fan blade 35, the other end of the metal frame 34 is fixedly connected with two metal half rings 32, the deviating sides of the two metal half rings 32 are provided with connecting components, the connecting components comprise a fixing box 29, the fixing box 29 is connected with the hollow mounting box 15 through fixing columns, the inside of the fixing box 29 is slidingly connected with an electric brush 28, the electric brush 28 is connected with the fixing box 29 through a second spring 20, the electric brush 28 contacts with the metal semi-ring 32, the fixed box 29 is fixedly connected with a second lead 31, one end of the second lead 31 is connected with the electric brush 28, the other end of the second lead 31 extends to the lower part of the pressing sheet 16 and is connected with the conducting strip 13, when the first lead 9 is electrified for use after being installed, current is conveyed to the electric brush 28 through the second lead 31, the electric brush 28 can be tightly contacted with the metal semi-ring 32 under the action of the second spring 20, thus the current on the electric brush 28 can be conveyed to the metal frame 34 through the metal semi-ring 32, the metal frame 34 becomes a flat electromagnet, the metal frame 34 can be continuously rotated due to the action of the first magnetic block 33 and the second magnetic block 38, the second rotating shaft 36 can be driven to rotate by the rotation of the metal frame 34, the fan blade 35 can be driven to rotate by the rotation of the second rotating shaft 36, the air flow at the joint can be accelerated by the rotation of the fan blade 35, the heat generated at the joint can be dissipated more quickly, and a good heat dissipation effect is achieved.
Example 2:
as shown in fig. 3 and 8, when the other portions are the same as those of embodiment 1, this embodiment differs from embodiment 1 in that: the screw 3 is fixedly connected with a hollow protection plate 2, the hollow protection plate 2 is provided with a groove 14, the width of the groove 14 is larger than the diameter of the first lead 9, and the hollow protection plate 2 is in sliding connection with the partition plate 37;
when the screw rod 3 drives the pressing sheet 16 to move, the hollow protection plate 2 is also driven to move, so that the joint can be effectively shielded, and the phenomenon that an operator touches the joint by mistake due to exposure of the joint is avoided;
the pressing sheet 16 is in sliding connection with the partition plate 37, and the first spring 17 is arranged, so that the screw 3 can always face the thread groove on the conducting strip 13, shake is avoided when the screw 3 is not used, the screw 3 and the thread groove are dislocated, secondary connection is not facilitated, and loss phenomenon can be effectively avoided when the screw 3 is not used through limiting the screw 3;
two connecting blocks 12 are fixedly connected to the hollowed-out protection plate 2, limit grooves 19 are formed in the left side and the right side of the connecting blocks 12, a plurality of limit mechanisms are fixedly connected to the shell 1, each limit mechanism comprises a limit box 10, each limit box 10 is fixedly connected with the shell 1, limit pipes 11 are fixedly connected to the inner walls of the left side and the right side of the inside of each limit box 10, sliding plates 21 are slidably connected to the corresponding limit pipes 11 through third springs 30, limit hemispheres 22 are fixedly connected to the corresponding limit pipes 21, the corresponding limit hemispheres 22 extend to the outer sides of the corresponding limit pipes 11, the corresponding limit hemispheres 22 are matched with the corresponding limit grooves 19, after the lead is clamped by the corresponding pressing piece 16 and the corresponding conductive sheet 13, the connecting blocks 12 on the hollowed-out protection plate 2 can enter the limit boxes 10, the corresponding limit hemispheres 22 are extruded into the corresponding limit hemispheres 22, and the corresponding limit grooves 19 on the connecting blocks 12 continuously enter the corresponding limit boxes, the corresponding limit hemispheres 22 can be effectively clamped with the corresponding limit grooves 19, the corresponding hollow-out protection plate 2 are limited, and a first lead 9 at a connection position is prevented from being loose due to vibration or thermal expansion.
Example 3:
as shown in fig. 2 and 7, in the case where the other portions are the same as in embodiment 1, this embodiment differs from embodiment 1 in that: the fan mechanism comprises an internal thread pipe 24, the internal thread pipe 24 is positioned in a heat dissipation groove, the internal thread pipe 24 is connected with a shell 1 through a positioning column 23, a heat conduction pipe 27 is connected in the internal thread of the internal thread pipe 24, a bimetal spiral piece 26 is arranged in the heat conduction pipe 27, one end of the bimetal spiral piece 26 is fixedly connected with the heat conduction pipe 27, the other end of the bimetal spiral piece 26 is fixedly connected with a first rotating shaft 25, the first rotating shaft 25 penetrates through the internal thread pipe 24 and is rotationally connected with the internal thread pipe 24, one end of the first rotating shaft 25 positioned outside the internal thread pipe 24 is fixedly connected with a rotating plate 8, heat dissipation plates 4 are symmetrically arranged on the upper side and the lower side of the rotating plate 8, a plurality of heat dissipation holes 6 are formed in the heat dissipation plates 4, the heat dissipation plates 4 are fixedly connected with the heat dissipation groove, the rotating plate 8 is rotationally connected with the heat dissipation plates 4, the upper side and the lower side of the rotating plate 8 are both provided with first limiting plates 5, the first limiting plates 5 are fixedly connected with the shell 1, and the left side and the right side of the rotating plate 8 are fixedly connected with second limiting plates 7;
with the continuous working operation of the device, heat can be generated in the shell 1 and can be absorbed by the heat conducting pipe 27, and as the temperature of the heat absorbed by the heat conducting pipe 27 rises, the bimetal spiral piece 26 in the heat conducting pipe 27 can continuously rotate under the action of the heat, the bimetal spiral piece 26 rotates to drive the first rotating shaft 25 to rotate, the first rotating shaft 25 rotates to drive the rotating plate 8 to rotate, the rotating plate 8 rotates to open the heat radiating groove, the heat radiating capacity of the heat radiating groove is stronger than that of the heat radiating hole 6, and as the heat radiating groove is continuously opened, the heat radiating capacity of the whole device is also improved, so that the problem of insufficient heat radiating capacity is effectively avoided;
the switch of the heat dissipation groove is related to the temperature change in the shell 1, the heat dissipation groove is gradually opened when the temperature rises, the heat dissipation groove is gradually closed when the temperature decreases, and the rotary plate 8 is in a vertical state after the temperature reaches higher temperature by arranging the first limiting plate 5 and the second limiting plate 7, so that the heat dissipation groove is in a maximum open state for heat dissipation;
compared with the traditional radiating holes 6, the radiating effect of the radiating grooves is better than that of the radiating holes 6, and when the radiating grooves are not used daily and do not generate heat, the radiating holes 6 can better block dust from entering the inside of the shell 1 compared with the radiating grooves, the effect of blocking the dust is better than that of the radiating grooves, and therefore the opening or closing of the radiating grooves is controlled through the temperature of the radiating grooves.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a CT secondary side overvoltage protection device, includes casing (1), its characterized in that: a plurality of baffle plates (37) are fixedly arranged on the shell (1), a hollow fixed plate (18) is fixedly connected between two adjacent baffle plates (37), a through hole is formed in the hollow fixed plate (18) in a penetrating mode, a screw rod (3) is arranged in the through hole, a pressing sheet (16) is arranged on the screw rod (3), the pressing sheet (16) is rotationally connected with the screw rod (3), the pressing sheet (16) is connected with the hollow fixed plate (18) through a first spring (17), the first spring (17) is sleeved on the screw rod (3), a heat dissipation mechanism is arranged on the pressing sheet, a conducting strip (13) is arranged on the left side of the pressing sheet (16), the conducting strip (13) is fixedly connected with the shell (1), and threaded grooves are formed in the conducting strip and the shell (1) and are in threaded connection with the screw rod (3);
the heat dissipation mechanism is used for accelerating air flow at the wiring terminal of the device, and is started when the device is electrified and closed when the device is powered off;
the shell (1) is provided with a plurality of radiating grooves, a ventilation mechanism is arranged in each radiating groove, and the ventilation mechanism is used for adjusting the size of a ventilation opening of the shell (1) and adjusting according to the temperature.
2. The CT secondary side overvoltage protection device according to claim 1, wherein: the heat dissipation mechanism comprises a hollowed mounting box (15), a first magnetic block (33) and a second magnetic block (38) are fixedly connected inside the hollowed mounting box (15), the magnetism of the first magnetic block (33) and the magnetism of the second magnetic block (38) are opposite, a metal frame (34) is arranged between the first magnetic block (33) and the second magnetic block (38), one end of the metal frame (34) is fixedly connected with a second rotating shaft (36), the second rotating shaft (36) penetrates through the hollowed mounting box (15) and is rotationally connected with the hollowed mounting box (15), the second rotating shaft (36) is made of plastic, one end of the second rotating shaft (36) located outside the hollowed mounting box (15) is fixedly connected with a fan blade (35), the other end of the metal frame (34) is fixedly connected with two metal semi-rings (32), and one side, deviating from each metal semi-ring (32) is provided with a connecting assembly.
3. The CT secondary side overvoltage protection device according to claim 2, wherein: the connecting assembly comprises a fixing box (29), the fixing box (29) is connected with a hollowed mounting box (15) through a fixing column, an electric brush (28) is connected with the fixing box (29) in a sliding mode, the electric brush (28) is connected with the fixing box (29) through a second spring (20), the electric brush (28) is in contact with a metal semi-ring (32), a second conducting wire (31) is fixedly connected to the fixing box (29), one end of the second conducting wire (31) is connected with the electric brush (28), and the other end of the second conducting wire (31) extends to the lower portion of a pressing piece (16) to be connected with a conducting piece (13).
4. The CT secondary side overvoltage protection device according to claim 1, wherein: the ventilation mechanism comprises an inner threaded pipe (24), the inner threaded pipe (24) is located inside a heat dissipation groove, the inner threaded pipe (24) is connected with a shell (1) through a positioning column (23), a heat conducting pipe (27) is connected with the inner threaded pipe (24) in a threaded mode, a bimetal spiral sheet (26) is arranged inside the heat conducting pipe (27), one end of the bimetal spiral sheet (26) is fixedly connected with the heat conducting pipe (27), the other end of the bimetal spiral sheet (26) is fixedly connected with a first rotating shaft (25), the first rotating shaft (25) penetrates through the inner threaded pipe (24) and is connected with the inner threaded pipe (24) in a rotating mode, one end of the first rotating shaft (25) located outside the inner threaded pipe (24) is fixedly connected with a rotating plate (8), heat dissipation plates (4) are symmetrically arranged on the upper side and the lower side of the rotating plate (8), a plurality of heat dissipation holes (6) are formed in the heat dissipation plates (4), and the rotating plate (8) are fixedly connected with the heat dissipation groove.
5. The CT secondary side overvoltage protection device according to claim 4, wherein: the utility model discloses a motor vehicle, including rotor plate (8), casing (1), rotor plate (8), first limiting plate (5) are all provided with in both sides about rotor plate (8), first limiting plate (5) and casing (1) fixed connection, rotor plate (8) both sides all are fixedly connected with second limiting plate (7).
6. The CT secondary side overvoltage protection device according to claim 1, wherein: fixedly connected with fretwork guard plate (2) on screw rod (3), set up recess (14) on fretwork guard plate (2), the width of recess (14) is greater than the diameter of first wire (9), fretwork guard plate (2) and baffle (37) sliding connection.
7. The CT secondary side overvoltage protection device according to claim 1, wherein: two connecting blocks (12) are fixedly connected to the hollowed-out protection plate (2), limiting grooves (19) are formed in the left side and the right side of each connecting block (12), and a plurality of limiting mechanisms are fixedly connected to the shell (1).
8. The CT secondary side overvoltage protection device according to claim 7, wherein: the limiting mechanism comprises a limiting box (10), the limiting box (10) is fixedly connected with a shell (1), limiting pipes (11) are fixedly connected to the inner walls of the left side and the right side of the inside of the limiting box (10), sliding plates (21) are connected to the inner sides of the limiting pipes (11) in a sliding mode, the sliding plates (21) are connected with the limiting pipes (11) through third springs (30), limiting hemispheres (22) are fixedly connected to the sliding plates (21), the limiting hemispheres (22) extend to the outer sides of the limiting pipes (11), and the limiting hemispheres (22) are matched with limiting grooves (19).
Priority Applications (1)
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