CN110391639B - Overcurrent circuit protection device based on servo control - Google Patents
Overcurrent circuit protection device based on servo control Download PDFInfo
- Publication number
- CN110391639B CN110391639B CN201910655172.5A CN201910655172A CN110391639B CN 110391639 B CN110391639 B CN 110391639B CN 201910655172 A CN201910655172 A CN 201910655172A CN 110391639 B CN110391639 B CN 110391639B
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- permanent magnet
- metal tube
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- 239000002184 metal Substances 0.000 claims abstract description 45
- 230000005389 magnetism Effects 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
Classifications
-
- 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
- H02H3/08—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 current
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- Emergency Protection Circuit Devices (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention belongs to the technical field of circuit protection, and discloses an overcurrent circuit protection device based on servo control, which comprises an adjusting circuit and a protection switch, wherein the adjusting circuit comprises a slide rheostat, an alarm lamp and a relay, when the overcurrent circuit protection device is used, a coil is connected with an external power supply, the coil is wound around a metal tube for a plurality of turns and then is electrically connected with a negative electrode plate, a positive electrode plate is fixedly connected to a permanent magnet, the positive electrode plate is in sliding connection with the negative electrode plate, when the current on the coil is overlarge, magnetism generated at two ends of the metal tube is also increased, the permanent magnet is pushed to slide towards one end far away from the metal tube until the positive electrode plate and the negative electrode plate are separated to form an open circuit, the protection switch and the slide rheostat are connected in series, and the magnetic size of the metal tube can be adjusted through the slide rheostat, so that the passing current range is adjusted, and the problem that circuit protection devices of different types are required to be replaced when the current range of users is avoided is quite inconvenient is solved.
Description
Technical Field
The invention belongs to the technical field of circuit protection, and particularly relates to an overcurrent circuit protection device based on servo control.
Background
The overcurrent protection device is a device for avoiding damage caused by open circuit of a machine or an element due to overlarge current in a circuit, and when the circuit is in short circuit or the current is overlarge, the electric connection between the circuit and an external power supply can be automatically disconnected.
Most of circuit protection devices on the market are set with protection ranges by manufacturers, the structure is complex, users cannot adjust according to autonomous needs, and when the users need to adjust the protection ranges, the circuit protection devices with different models need to be replaced, so that the circuit protection devices are very inconvenient to use.
Disclosure of Invention
The invention provides an overcurrent circuit protection device based on servo control, which aims to solve the problems that most of circuit protection devices in the market are set by manufacturers to have a complex protection range, users cannot adjust the protection range according to autonomous needs, and when the users need to adjust the protection range, the users need to replace circuit protection devices with different types, so that the use is very inconvenient.
The invention is realized in such a way, the overcurrent circuit protection device based on servo control comprises an adjusting circuit and a protection switch, wherein the adjusting circuit comprises a slide rheostat, an alarm lamp and a relay, the slide rheostat is connected with the relay in series and is connected in parallel in a circuit relative to the alarm lamp;
the protection switch comprises a fixed plate, a metal tube, a coil, a negative electrode plate, a permanent magnet, a slide tube and a positive electrode plate, wherein the protection switch is connected in series with the slide rheostat in a circuit, the metal tube is fixedly connected inside the fixed plate, the coil is wound on the outer surface of the metal tube, the negative electrode plate is fixedly connected to the outer surface of the fixed plate and is electrically connected with the coil, the permanent magnet is positioned inside the slide tube and is in sliding connection with the slide tube, and the positive electrode plate is fixedly connected with one end of the permanent magnet, which is close to the negative electrode plate.
Preferably, the regulating circuit further comprises a fixed value resistor, wherein the fixed value resistor is connected with the alarm lamp in series and is connected with the protection switch in parallel in the circuit.
Preferably, the protection switch further comprises a base and a supporting rod, wherein the base is located at the bottom of the supporting rod and is fixedly connected with the supporting rod, the number of the supporting rods is two, and the fixing plate and the sliding tube are respectively fixedly connected with the base through two supporting rods.
Preferably, the metal tube has a circular tubular structure, and the coil is wound on the outer surface of the metal tube in multiple layers.
Preferably, one end of the positive electrode plate, which is far away from the permanent magnet, is clamped on the outer surfaces of the two negative electrode plates and is in sliding connection with the negative electrode plates.
Preferably, the negative electrode plate is L-shaped, and the diameters of the negative electrode plate from one end far away from the permanent magnet to one end close to the permanent magnet are sequentially reduced.
Preferably, one end of the relay connected with an external power supply is grounded for protecting the circuit.
Preferably, the metal tube has the same magnetic properties as the end adjacent to the permanent magnet.
Compared with the prior art, the invention has the beneficial effects that: according to the over-current circuit protection device based on servo control, the slide rheostat, the metal tube, the coil, the permanent magnet, the negative electrode plate and the positive electrode plate are arranged, when the over-current circuit protection device is used, the coil is connected with an external power supply, the coil is wound around the metal tube for a plurality of turns and then is electrically connected with the negative electrode plate, the positive electrode plate is fixedly connected with the permanent magnet, the positive electrode plate is in sliding connection with the negative electrode plate, when the current on the coil is overlarge, magnetism generated at two ends of the metal tube is also increased, the permanent magnet is pushed to slide towards one end far away from the metal tube until the positive electrode plate and the negative electrode plate are separated to form an open circuit, an overlarge current damage circuit is avoided, the protection switch is connected with the slide rheostat in series, the magnetic size of the metal tube can be adjusted through the change of the slide rheostat, and therefore the passing current range is adjusted, the problem that different types of circuit protection devices are required to be replaced when the current range of a user is avoided is quite inconvenient is solved.
It should be understood that what has been described above is a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principle of the present invention, and these modifications and adaptations are also considered as protecting the scope of the present invention.
Drawings
FIG. 1 is a schematic diagram of a protection switch of the present invention;
FIG. 2 is a schematic diagram of a regulating circuit according to the present invention;
FIG. 3 is a schematic diagram of the connection of the present invention.
In the figure: 1. an adjusting circuit; 11. a slide rheostat; 12. a fixed value resistor; 13. an alarm lamp; 14. a relay; 2. a protection switch; 21. a fixing plate; 22. a metal tube; 23. a coil; 24. a negative electrode sheet; 25. a permanent magnet; 26. a slide tube; 27. a positive electrode sheet; 28. a base; 29. and (5) supporting the rod.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1-3, the present invention provides a scheme: the over-current circuit protection device based on servo control comprises an adjusting circuit 1 and a protection switch 2, wherein the adjusting circuit 1 comprises a slide rheostat 11, an alarm lamp 13 and a relay 14, and the slide rheostat 11 is connected with the relay 14 in series and is connected in parallel in a circuit relative to the alarm lamp 13;
the protection switch 2 comprises a fixed plate 21, a metal tube 22, a coil 23, a negative electrode plate 24, a permanent magnet 25, a slide tube 26 and a positive electrode plate 27, wherein the protection switch 2 and the slide rheostat 11 are connected in series in a circuit, the metal tube 22 is fixedly connected inside the fixed plate 21, the coil 23 is wound on the outer surface of the metal tube 22, the negative electrode plate 24 is fixedly connected on the outer surface of the fixed plate 21 and is electrically connected with the coil 23, the permanent magnet 25 is positioned inside the slide tube 26 and is in sliding connection with the slide tube 26, and the positive electrode plate 27 is fixedly connected with one end of the permanent magnet 25, which is close to the negative electrode plate 24.
In this embodiment, the metal tube 22 is disposed inside the fixed plate 21, the outer surface of the metal tube 22 is wound with the multi-turn coil 23, the output end of the coil 23 is electrically connected with the negative electrode plate 24 fixedly connected to the outer surface of the fixed plate 21, the permanent magnet 25 is slidingly connected inside the sliding tube 26, the magnetism of one end of the metal tube 22 adjacent to the permanent magnet 25 is the same, and one end of the permanent magnet 25 adjacent to the metal tube 22 is fixedly connected with the positive electrode plate 27, the outer surface of the fixed plate 21 is fixedly connected with the negative electrode plate 24, the diameter of one end of the negative electrode plate 24 far from the permanent magnet 25 is sequentially reduced, the positive electrode plate 27 is clamped on the outer surface of the negative electrode plate 24, when the current in the circuit is increased, i.e. the current on the coil 23 and the metal tube 22 together form the solenoid is increased, the permanent magnet 25 is pushed to slide inwards according to the principle of homopolar repulsion, the permanent magnet 25 is moved from left to right, the diameter of the negative electrode plate 24 is sequentially reduced, the resistance of the negative electrode plate 24 is increased, the current is prevented from being burnt down by the large current in the shunt electrode plate 24, and the large current is prevented from being burnt down by the mechanical force on the positive electrode plate 24, and the large current is further avoided when the magnetic electrode plate is further burnt down.
In this embodiment, when in use, the protection switch 2 is connected in series with a machine, the base 28 is fixed on the machine, the top of the base 28 is fixedly connected with two support rods 29, the tops of the two support rods 29 are respectively fixedly connected with a fixing plate 21 and a slide tube 26, a metal tube 22 is arranged inside the fixing plate 21, a multi-turn coil 23 is wound on the outer surface of the metal tube 22, the output end of the coil 23 is electrically connected with a cathode electrode plate 24 fixedly connected with the outer surface of the fixing plate 21, a permanent magnet 25 is slidingly connected inside the slide tube 26, the magnetism of one end of the metal tube 22 adjacent to the permanent magnet 25 is the same, one end of the permanent magnet 25 adjacent to the metal tube 22 is fixedly connected with an anode electrode plate 27, the outer surface of the fixing plate 21 is fixedly connected with a cathode electrode plate 24, the diameters of one end of the cathode electrode plate 24 away from the permanent magnet 25 to one end close to the permanent magnet 25 are sequentially reduced, the positive electrode plate 27 is clamped on the outer surface of the negative electrode plate 24, when the current in a circuit increases, namely the current on the coil 23 increases, the magnetism of an electrified solenoid formed by the coil 23 and the metal tube 22 is enhanced, the permanent magnet 25 is pushed to slide along the slide tube 26 according to the principle of like polarity repulsion, the permanent magnet 25 moves to drive the positive electrode plate 27 to move rightwards, the resistance of the negative electrode plate 24 increases due to the fact that the diameter of the negative electrode plate 24 decreases from left to right in turn, the current generated by the negative electrode plate 24 is shunted, the problem of overlarge current in the circuit and the problem of burning machine are avoided, when the current is overlarge, the magnetism on the electrified solenoid is further increased, the permanent magnet 25 is pushed to move rightwards until the positive electrode plate 27 and the negative electrode plate 24 are separated, at the moment, the overlarge current burning machine is avoided, the both ends of protection switch 2 still parallel connection have alarm lamp 13, alarm lamp 13 and definite value resistance 12 establish ties, after anodal electrode slice 27 and negative electrode slice 24 break and form the circuit, the electric current can't pass through, then circulate through definite value resistance 12, insert alarm lamp 13 in the circuit, alarm lamp 13 flash immediately reports to the police, remind the user, protection switch 2 has still established ties slide rheostat 11, change the circuit current through slide rheostat 11, the size of magnetism on the solenoid that can control, thereby the user's regulation current scope of being convenient for, need change circuit protection device in the traditional mode, very inconvenient problem has been avoided.
Further, the regulating circuit 1 further comprises a fixed resistor 12, and the fixed resistor 12 is connected in series with the alarm lamp 13 and is connected in parallel with the protection switch 2 in the circuit.
In the present embodiment, the constant value resistor 12 is connected in series with the alarm lamp 13 and connected in parallel with the protection switch 2 in the circuit, so that when the protection switch 2 is closed, the current flows through the protection switch 2 to form a closed loop, the machine is energized, after the protection switch 2 is opened, the current is connected with the alarm lamp 13 through the constant value resistor 12, the alarm lamp 13 flashes, and the user is notified that the current is excessive in the circuit, so that the protection switch 2 is opened.
Further, the protection switch 2 further comprises a base 28 and supporting rods 29, the base 28 is located at the bottom of the supporting rods 29 and fixedly connected with the supporting rods 29, the number of the supporting rods 29 is two, and the fixing plate 21 and the sliding tube 26 are respectively and fixedly connected with the base 28 through the two supporting rods 29.
In the present embodiment, a base 28 and a support rod 29 are provided for supporting the fixing plate 21 and the slide tube 26 so that the permanent magnet 25 can horizontally slide inside the slide tube 26, thereby controlling the communication state of the machine with an external power source.
Further, the metal tube 22 has a circular tubular structure, and the coil 23 is wound around the outer surface of the metal tube 22 in a plurality of layers.
In this embodiment, the metal tube 22 is provided with a circular tubular structure, the coil 23 is wound on the outer surface of the metal tube 22 in multiple layers, so that an energized solenoid structure is formed between the metal tube 22 and the coil 23, when the current in the coil 23 increases, the magnetism of the energized solenoid increases, so that the permanent magnet 25 is pushed away from the metal tube 22, and when the positive electrode plate 27 provided on the permanent magnet 25 is separated from the negative electrode plate 24 provided on the fixing plate 21, an open circuit is formed, so that the mechanical damage caused by the excessive current is avoided.
Further, one end of the positive electrode plate 27, which is far away from the permanent magnet 25, is clamped on the outer surfaces of the two negative electrode plates 24, and is slidably connected with the negative electrode plates 24.
In the present embodiment, one end of the positive electrode tab 27, which is far from the permanent magnet 25, is clamped on the outer surfaces of the two negative electrode tabs 24 and is slidably connected with the negative electrode tabs 24, so that when the positive electrode tab 27 contacts with the negative electrode tab 24, a closed loop can be formed to drive the machine to operate, and when the positive electrode tab 27 is separated from the negative electrode tab 24, an open circuit is formed to protect the machine.
Further, the negative electrode tab 24 is L-shaped, and the diameter of the negative electrode tab 24 decreases in order from one end far from the permanent magnet 25 to one end near the permanent magnet 25.
In this embodiment, the diameters of the end, away from the permanent magnet 25, of the negative electrode plate 24 to the end, close to the permanent magnet 25, are sequentially reduced, so that the resistance on the negative electrode plate 24 is sequentially increased from left to right, and the negative electrode plate is used for wind current, so that damage to machinery caused by excessive current in a circuit is avoided.
Further, one end of the relay 14 connected to an external power source is grounded for protecting the circuit.
In the present embodiment, the relay 14 is grounded at one end connected to an external power source, and is used to protect a circuit from the risk of disconnection.
Further, the metal tube 22 has the same magnetic properties as the end adjacent to the permanent magnet 25.
In this embodiment, the magnetism of the end of the metal tube 22 adjacent to the permanent magnet 25 is the same, so that the energizing solenoid structure formed by the metal tube 22 and the coil 23 can push the permanent magnet 25 away from the metal tube 22 by magnetic force after energizing, when the current intensity is larger, the magnetism on the energizing solenoid is stronger, when the current exceeds the set range, the negative electrode plate 24 electrically connected with the coil 23 is separated from the positive electrode plate 27, thus forming an open circuit, and avoiding damage to machinery caused by overlarge current in the circuit.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The overcurrent circuit protection device based on servo control comprises an adjusting circuit (1) and a protection switch (2), and is characterized in that the adjusting circuit (1) comprises a sliding rheostat (11), an alarm lamp (13) and a relay (14), wherein the sliding rheostat (11) is connected with the relay (14) in parallel, and the alarm lamp (13) is connected in series in the circuit; the protection switch (2) comprises a fixed plate (21), a metal tube (22), a coil (23), a negative electrode plate (24), a permanent magnet (25), a slide tube (26) and a positive electrode plate (27), wherein the protection switch (2) and the slide rheostat (11) are connected in series in a circuit, the metal tube (22) is fixedly connected inside the fixed plate (21), the coil (23) is wound on the outer surface of the metal tube (22), the negative electrode plate (24) is fixedly connected on the outer surface of the fixed plate (21) and is electrically connected with the coil (23), the permanent magnet (25) is positioned inside the slide tube (26) and is in sliding connection with the slide tube (26), and the positive electrode plate (27) is fixedly connected with one end, close to the negative electrode plate (24), of the permanent magnet (25).
The magnetism of one end of the metal tube (22) adjacent to the permanent magnet (25) is the same;
the regulating circuit (1) further comprises a fixed value resistor (12), wherein the fixed value resistor (12) is connected with the alarm lamp (13) in series and is connected with the protection switch (2) in parallel in the circuit.
2. The overcurrent circuit protection device based on servo control as set forth in claim 1, wherein the protection switch (2) further comprises a base (28) and a support rod (29), the base (28) is located at the bottom of the support rod (29) and is fixedly connected with the support rod (29), the number of the support rods (29) is two, and the fixing plate (21) and the slide tube (26) are fixedly connected with the base (28) through two support rods (29) respectively.
3. The servo-control-based overcurrent circuit protection device as set forth in claim 1, wherein the metal tube (22) has a circular tubular structure, and the coil (23) is wound in a plurality of layers around the outer surface of the metal tube (22).
4. The overcurrent circuit protection device based on servo control as set forth in claim 1, wherein one end of the positive electrode sheet (27) away from the permanent magnet (25) is clamped on the outer surfaces of the two negative electrode sheets (24) and is slidably connected with the negative electrode sheets (24).
5. The overcurrent circuit protection device based on servo control as set forth in claim 1, wherein the negative electrode sheet (24) has an L-shape, and the diameters of the negative electrode sheet (24) decrease in order from the end far from the permanent magnet (25) to the end near to the permanent magnet (25).
6. A servo-control based overcurrent circuit protection device according to claim 1, characterized in that the relay (14) is grounded at the end connected to an external power source for protecting the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655172.5A CN110391639B (en) | 2019-07-19 | 2019-07-19 | Overcurrent circuit protection device based on servo control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655172.5A CN110391639B (en) | 2019-07-19 | 2019-07-19 | Overcurrent circuit protection device based on servo control |
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| Publication Number | Publication Date |
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| CN110391639A CN110391639A (en) | 2019-10-29 |
| CN110391639B true CN110391639B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910655172.5A Active CN110391639B (en) | 2019-07-19 | 2019-07-19 | Overcurrent circuit protection device based on servo control |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113001912A (en) * | 2021-02-22 | 2021-06-22 | 邱观丽 | Automatic injection mold clamping device of control |
| CN113937727A (en) * | 2021-10-20 | 2022-01-14 | 傲普(上海)新能源有限公司 | Relay integrated circuit with pre-charging and short-circuit protection functions |
| CN116130264B (en) * | 2023-04-12 | 2023-07-18 | 成都工业职业技术学院 | Automatic alarm cutting device and early warning method for variable frequency cabinet |
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| KR100798340B1 (en) * | 2006-12-29 | 2008-01-28 | 엘에스산전 주식회사 | Molded case circuit breaker with limit current function |
| CN202067716U (en) * | 2011-05-12 | 2011-12-07 | 东北大学 | Double-fluid circuit breaker capable of realizing remote control by using electromagnet |
| KR20160143141A (en) * | 2015-06-04 | 2016-12-14 | 엘에스산전 주식회사 | Fast Switch |
| CN208336105U (en) * | 2018-06-21 | 2019-01-04 | 国网黑龙江省电力有限公司佳木斯供电公司 | A kind of alarm relay protective device |
| CN210123886U (en) * | 2019-07-19 | 2020-03-03 | 江苏阆达机械有限公司 | Overcurrent circuit protection device based on servo control |
-
2019
- 2019-07-19 CN CN201910655172.5A patent/CN110391639B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100798340B1 (en) * | 2006-12-29 | 2008-01-28 | 엘에스산전 주식회사 | Molded case circuit breaker with limit current function |
| CN202067716U (en) * | 2011-05-12 | 2011-12-07 | 东北大学 | Double-fluid circuit breaker capable of realizing remote control by using electromagnet |
| KR20160143141A (en) * | 2015-06-04 | 2016-12-14 | 엘에스산전 주식회사 | Fast Switch |
| CN208336105U (en) * | 2018-06-21 | 2019-01-04 | 国网黑龙江省电力有限公司佳木斯供电公司 | A kind of alarm relay protective device |
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| CN110391639A (en) | 2019-10-29 |
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