CN112202148A - Overheat protection device for internal circuit of power distribution cabinet - Google Patents
Overheat protection device for internal circuit of power distribution cabinet Download PDFInfo
- Publication number
- CN112202148A CN112202148A CN202011043707.2A CN202011043707A CN112202148A CN 112202148 A CN112202148 A CN 112202148A CN 202011043707 A CN202011043707 A CN 202011043707A CN 112202148 A CN112202148 A CN 112202148A
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- CN
- China
- Prior art keywords
- fixedly connected
- heat
- air bag
- connecting rod
- conducting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
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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
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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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
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- 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
- H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—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 distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to the technical field of circuit protection, in particular to an overheating protection device for an internal circuit of a power distribution cabinet, wherein an air bag is fixedly connected to the inner wall of one side of an air bag shell, one end of the air bag is movably connected to the inside of the air bag shell and is fixedly connected with a slide block, one end of the slide block is fixedly connected with a first spring, one end of the first spring movably penetrates through the outside of the air bag shell and is fixedly connected with a push plate, the outer surface of the push plate is movably connected with a first connecting rod, the other end of the first connecting rod is fixedly connected with a second connecting rod, the bottom end of the second support plate is fixedly connected with a spare wire, the push plate drives the first connecting rod to upwards push the second connecting rod, and further the second support plate drives the spare wire to upwards move to the outer surface separated from a wire body, so that the cross-sectional area of the wire, the function of protecting the conductor body is achieved, and the circuit is prevented from being burnt out.
Description
Technical Field
The invention relates to the technical field of circuit protection, in particular to an overheating protection device for an internal circuit of a power distribution cabinet.
Background
The switch board is called the distribution board again, generally comprises cabinet body, circuit breaker, protection device, monitoring devices, electric energy meter, and other quadratic element devices, and the distribution board mainly used is: the power distribution cabinet is used in the occasions with dispersed loads and less loops, the motor control center is used in the occasions with concentrated loads and more loops, the motor control center distributes the electric energy of a certain circuit of the upper-level distribution equipment to the nearby loads, and the equipment provides protection, monitoring and control for the loads.
However, when the voltage of the circuit is adjusted through the transformer, the voltage introduced by the internal circuit of the power distribution cabinet is changed, and under the condition that the current is constant, because the shape of the wire inside the power distribution cabinet is fixed and unchanged, when the voltage introduced by the wire is increased, the heat generated by the wire is increased, the wire can be burned out, and even the danger of fire is caused.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides an overheat protection device for an internal circuit of a power distribution cabinet, which is achieved by the following specific technical means:
an overheating protection device for an internal circuit of a power distribution cabinet comprises a protective shell, wherein a wire body is fixedly connected inside the protective shell, a heat conduction assembly is fixedly connected to the upper surface of the wire body, an air bag shell is fixedly connected to the upper end of the heat conduction assembly, an air bag is fixedly connected to the inner wall of one side of the air bag shell, one end of the air bag is movably connected to a sliding block fixedly connected inside the air bag shell, one end of the sliding block is fixedly connected with a first spring, one end of the first spring movably penetrates through the outer portion of the air bag shell and is fixedly connected with a push plate, a first connecting rod is movably connected to the outer surface of the push plate, a second connecting rod is fixedly connected to the other end of the first connecting rod, a second support plate is fixedly connected to the bottom end of the second connecting rod, a standby wire is fixedly connected to the bottom end of the second support plate, the utility model discloses an air bag heat conduction assembly, including the outer fixed surface of first extension board, the outer fixed surface of rack board is connected with the rack board, the worm wheel has all been meshed to the left and right sides of rack board, the inner wall and the swing joint of protecting sheathing are at the one end fixedly connected with limiting plate of worm wheel, the one end meshing threaded rod of worm wheel, the bottom fixedly connected with air discharge fan of threaded rod, the heat conduction subassembly includes heat-conducting plate, heat conduction frame and heat conduction silk, the bottom fixedly connected with heat-conducting plate of air bag shell, the bottom fixedly connected with heat conduction frame of heat-conducting plate, the.
Preferably, a second spring is fixedly connected between the first connecting rod and the rack plate, and the first connecting rod is made of a plastic insulating material.
Preferably, the heat conducting assembly and the air bag shell are made of copper materials, and the push plate is made of plastic insulating materials.
Preferably, the bottom end of the heat conducting frame is fixedly connected with the outer surface of the wire body, and the number of the heat conducting assemblies is two.
Preferably, the lower surface of the spare lead is provided with a rectangular groove, and the upper surface of the lead body is fixedly connected with a rectangular convex block.
Preferably, the lead body and the spare lead are engaged with each other, and the lead body and the spare lead are made of the same material.
The invention has the following beneficial effects:
1. the overheat protection device for the internal circuit of the power distribution cabinet, when the voltage introduced by the conductor body is increased, the resistance of the conductor body is unchanged, the current in the conductor body is increased instantly, the heat generated by the conductor body is increased, the heat is transmitted to the inside of the air bag shell from the conductor body through the heat conducting component, the air bag in the air bag shell is heated and gradually expands, the air bag expands to push the push plate to move towards the outer side of the air bag shell, one end of the push plate is movably connected with the first connecting rod, and the other end of the first connecting rod is fixedly connected with the second connecting rod and the second support plate, so that the push plate drives the first connecting rod to upwards push the second connecting rod, the second support plate drives the standby conductor to move upwards to the outer surface separated from the conductor body, the cross-sectional area of the conductor body is reduced, the resistance value of the conductor body is increased, the generation of the heat in the, preventing the circuit from being burned out.
2. This an overheat protection device for switch board inner circuit, the in-process that shifts up through first connecting rod drive second connecting rod makes the rack plate shift up, again because the both ends meshing of rack plate has the worm wheel, the one end meshing threaded rod of worm wheel is the worm gear structure, therefore the rack plate drives the worm wheel rotatory, the worm wheel drives the threaded rod rotatory, and then make the threaded rod drive the air discharge fan and rotate, can in time discharge the moist hot-air in the cabinet, prevent that moist air from to the joint department oxidative corrosion of the cable of the internal secondary components and parts of cabinet, the normal use of device has been protected.
Drawings
Fig. 1 is a schematic view of the internal structure of the protective housing of the present invention.
FIG. 2 is a schematic view of the internal structure of the airbag housing of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 1.
FIG. 4 is a schematic structural diagram of a heat-conducting assembly according to the present invention.
FIG. 5 is a schematic view of the structure of the lead body and the spare lead according to the present invention.
In the figure: 1. a protective housing; 2. a lead body; 3. a heat conducting component; 4. an air bag housing; 5. an air bag; 6. a slider; 7. a first spring; 8. pushing the plate; 9. a first link; 10. a second link; 11. a second spring; 12. a first support plate; 13. a rack plate; 14. a second support plate; 15. a spare wire; 16. a worm gear; 17. a limiting plate; 18. a threaded rod; 19. an exhaust fan; 20. a heat conducting plate; 21. a heat conducting frame; 22. and (4) heat-conducting wires.
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. 1-5, an overheat protection device for an internal circuit of a power distribution cabinet comprises a protection housing 1, a wire body 2 fixedly connected to the inside of the protection housing 1, a heat conducting component 3 fixedly connected to the upper surface of the wire body 2, an air bag housing 4 fixedly connected to the upper end of the heat conducting component 3, an air bag 5 fixedly connected to the inner wall of one side of the air bag housing 4, a slider 6 fixedly connected to the inside of the air bag housing 4 at one end of the air bag 5 and movably connected to one end of the slider 6, a first spring 7 fixedly connected to one end of the first spring 7 and movably connected to a push plate 8 penetrating the outside of the air bag housing 4, a first connecting rod 9 movably connected to the outer surface of the push plate 8, a second connecting rod 10 fixedly connected to the other end of the first connecting rod 9, a second support plate 14 fixedly connected to the bottom end of the second connecting rod 10, and, a second spring 11 is fixedly connected between the first connecting rod 9 and the rack plate 13, the first connecting rod 9 is made of plastic insulating material, the heat conducting component 3 and the air bag shell 4 are made of copper material, the push plate 8 is made of plastic insulating material, a rectangular groove is formed in the lower surface of the standby lead 15, a rectangular protruding block is fixedly connected to the upper surface of the lead body 2, the lead body 2 and the standby lead 15 are clamped with each other, the materials of the lead body 2 and the standby lead 15 are the same, the air bag 5 inside the air bag shell 4 is gradually expanded when heated, the air bag 5 is expanded to push the push plate 8 to move towards the outer side of the air bag shell 4, because one end of the push plate 8 is movably connected with the first connecting rod 9, and the other end of the first connecting rod 9 is fixedly connected with the second connecting rod 10 and the second supporting plate 14, the push plate 8 drives the first connecting rod 9 to push the second connecting rod 10 upwards, and further the second supporting plate 14 drives the, therefore, the cross-sectional area of the lead body 2 is reduced, the resistance value of the lead body 2 is increased, the generation of heat inside the lead body 2 is reduced, the function of protecting the lead body 2 is achieved, and the circuit is prevented from being burnt out.
Wherein the top end of the second connecting rod 10 is fixedly connected with a first supporting plate 12, the outer surface of the first supporting plate 12 is fixedly connected with a rack plate 13, the left side and the right side of the rack plate 13 are respectively meshed with a worm wheel 16, the inner wall of the protective shell 1 is movably connected with a limiting plate 17 at one end of the worm wheel 16, one end of the worm wheel 16 is meshed with a threaded rod 18, the bottom end of the threaded rod 18 is fixedly connected with an exhaust fan 19, the heat-conducting component 3 comprises a heat-conducting plate 20, a heat-conducting frame 21 and heat-conducting wires 22, the bottom end of the air bag shell 4 is fixedly connected with the heat-conducting plate 20, the bottom end of the heat-conducting plate 20 is fixedly connected with the heat-conducting frame 21, the heat-conducting wires 22 are fixedly connected inside the heat-conducting frame 21, the bottom end of the heat-conducting frame 21 is fixedly connected with the outer surface of the conductor 2, the number of, one end of the worm wheel 16 is meshed with the threaded rod 18 to form a worm wheel and worm structure, so that the rack plate 13 drives the worm wheel 16 to rotate, the worm wheel 16 drives the threaded rod 18 to rotate, the threaded rod 18 further drives the exhaust fan 19 to rotate, moist hot air in the cabinet can be timely discharged, the moist air is prevented from oxidizing and corroding joints of cables of secondary components in the cabinet, and normal use of the devices is protected.
The working principle is as follows: when using, when the voltage increase that the conductor 2 lets in, the increase of 2 internal current of conductor, therefore the heat crescent of conductor 2 production, the heat is transmitted to the inside of air bag shell 4 through heat-conducting component 3 from the conductor 2, consequently, the inside gasbag 5 of air bag shell 4 is heated and is expanded gradually, gasbag 5 inflation promotes push pedal 8 and removes to the outside of air bag shell 4, because push pedal 8's one end and first connecting rod 9 swing joint, and the other end and second connecting rod 10 and second extension board 14 fixed connection of first connecting rod 9, consequently, push pedal 8 drives first connecting rod 9 and upwards promotes second connecting rod 10, and then make second extension board 14 drive reserve wire 15 and move up to the surface that breaks away from conductor 2, can know according to the law of resistance: under the condition that the resistivity and the length of the conductor are not changed, the smaller the cross-sectional area of the conductor is, the larger the resistance value is, and the expression is as follows:
R＝ρL/S
where ρ is the resistivity of the conductor, L is the length of the conductor connected to the circuit, S is the cross-sectional area of the conductor, and R is the resistance value of the conductor, so the resistance value R of the lead body 2 increases, and the voltage remains constant after the converted voltage tends to be stable, and it can be known from the calculation formula of thermal power that when the voltage of the conductor is constant, the resistance value of the conductor increases, and the amount of heat generated by the conductor is less, and the expression is as follows:
Q＝U2/Rt
therefore, the method reduces the generation of heat inside the conductor 2, plays a role in protecting the conductor 2, and prevents a circuit from being burnt out, the rack plate 13 is moved upwards in the process that the first connecting rod 9 drives the second connecting rod 10 to move upwards, and because the two ends of the rack plate 13 are meshed with the worm wheels 16, one end of each worm wheel 16 is meshed with the threaded rod 18 to form a worm and gear structure, the rack plate 13 drives the worm wheel 16 to rotate, the worm wheel 16 drives the threaded rod 18 to rotate, and further the threaded rod 18 drives the exhaust fan 19 to rotate, so that moist hot air in the cabinet can be timely exhausted, the moist air is prevented from oxidizing and corroding joints of cables of secondary components in the cabinet body, and the normal use of the devices is protected.
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. An overheat protection device for internal circuits of a power distribution cabinet, comprising a protective casing (1), characterized in that: the protection device is characterized in that a wire body (2) is fixedly connected inside the protection shell (1), a heat conducting component (3) is fixedly connected to the upper surface of the wire body (2), an air bag shell (4) is fixedly connected to the upper end of the heat conducting component (3), an air bag (5) is fixedly connected to the inner wall of one side of the air bag shell (4), one end of the air bag (5) is movably connected to a sliding block (6) inside the air bag shell (4), one end of the sliding block (6) is fixedly connected with a first spring (7), one end of the first spring (7) movably penetrates through the air bag shell (4) and is fixedly connected with a push plate (8), a first connecting rod (9) is movably connected to the outer surface of the push plate (8), a second connecting rod (10) is fixedly connected to the other end of the first connecting rod (9), and a second support plate (14) is fixedly connected to the bottom end of, the bottom fixedly connected with spare wire (15) of second extension board (14), the first extension board (12) of top fixedly connected with of second connecting rod (10), the external fixed surface of first extension board (12) is connected with rack plate (13), the left and right sides of rack plate (13) all has meshed worm wheel (16), the inner wall and the swing joint of protecting sheathing (1) are at the one end fixedly connected with limiting plate (17) of worm wheel (16), the one end meshing of worm wheel (16) has threaded rod (18), the bottom fixedly connected with air discharge fan (19) of threaded rod (18), heat-conducting subassembly (3) includes heat-conducting plate (20), heat-conducting frame (21) and heat-conducting wire (22), the bottom fixedly connected with heat-conducting plate (20) of air bag shell (4), the bottom fixedly connected with heat-conducting frame (21) of heat-conducting plate (20), the heat conducting frame (21) is fixedly connected with heat conducting wires (22) inside.
2. The overheat protection device for the internal circuit of the power distribution cabinet according to claim 1, wherein: fixedly connected with second spring (11) between first connecting rod (9) and rack plate (13), first connecting rod (9) are plastic insulating material.
3. The overheat protection device for the internal circuit of the power distribution cabinet according to claim 1, wherein: the heat conducting assembly (3) and the air bag shell (4) are made of copper materials, and the push plate (8) is made of a plastic insulating material.
4. The overheat protection device for the internal circuit of the power distribution cabinet according to claim 1, wherein: the bottom end of the heat conduction frame (21) is fixedly connected with the outer surface of the wire body (2), and the number of the heat conduction assemblies (3) is two.
5. The overheat protection device for the internal circuit of the power distribution cabinet according to claim 1, wherein: the lower surface of the standby lead (15) is provided with a rectangular groove, and the upper surface of the lead body (2) is fixedly connected with a rectangular convex block.
6. The overheat protection device for the internal circuit of the power distribution cabinet according to claim 1, wherein: the lead body (2) and the standby lead (15) are mutually clamped, and the lead body (2) and the standby lead (15) are made of the same material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011043707.2A CN112202148A (en) | 2020-09-28 | 2020-09-28 | Overheat protection device for internal circuit of power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011043707.2A CN112202148A (en) | 2020-09-28 | 2020-09-28 | Overheat protection device for internal circuit of power distribution cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112202148A true CN112202148A (en) | 2021-01-08 |
Family
ID=74007643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011043707.2A Withdrawn CN112202148A (en) | 2020-09-28 | 2020-09-28 | Overheat protection device for internal circuit of power distribution cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112202148A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821270A (en) * | 2021-01-23 | 2021-05-18 | 徐秋菊 | Intelligent device for preventing overload contact burning-out and short circuit for drawer type power distribution cabinet |
-
2020
- 2020-09-28 CN CN202011043707.2A patent/CN112202148A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821270A (en) * | 2021-01-23 | 2021-05-18 | 徐秋菊 | Intelligent device for preventing overload contact burning-out and short circuit for drawer type power distribution cabinet |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210108 |