CN112201551B - Overload protection equipment for electromechanical circuit - Google Patents
Overload protection equipment for electromechanical circuit Download PDFInfo
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- CN112201551B CN112201551B CN202011129666.9A CN202011129666A CN112201551B CN 112201551 B CN112201551 B CN 112201551B CN 202011129666 A CN202011129666 A CN 202011129666A CN 112201551 B CN112201551 B CN 112201551B
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- 239000012530 fluid Substances 0.000 claims description 44
- 230000005611 electricity Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000001133 acceleration Effects 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 230000008439 repair process Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- 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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- 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
- H02H3/093—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 with timing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention discloses an electromechanical line overload protection device, which comprises a shell, wherein an electric connection box is fixed on the inner wall of the shell, an electric connection block is connected to the inner wall of the electric connection box through a reset spring, a pair of electric connection plates which are abutted against the electric connection block are fixed on the inner wall of the electric connection box, an electromagnet corresponding to the electric connection block is fixed on the inner wall of the shell, a buffer box is fixed at the upper end of the electromagnet, a protection box is penetrated through the side wall of the shell, and a positive pressure block is fixed at the end part of the electric connection block. The advantages are that: according to the invention, by arranging the electromagnet, when overload phenomenon occurs on the circuit, the electromagnet can generate an effective strong magnetic field, so that the power receiving block is attracted to move, then the power receiving block is separated from the power receiving plate, and the whole circuit is interrupted, so that the circuit is protected, the circuit is safe, and the circuit cannot be directly powered off in the initial stage of overload, so that a user can be given a certain time to recover the error operation of the device without influencing the whole operation of the device, and the device is more reasonable and humanized.
Description
Technical Field
The invention relates to the technical field of electromechanical equipment, in particular to electromechanical line overload protection equipment.
Background
The electromechanical equipment generally refers to mechanical, electrical and electrical automation equipment, and in the building, the electromechanical equipment refers to mechanical and pipeline equipment except geotechnical, woodwork, reinforcing steel bars and muddy water, and is different from hardware, and the mechanical and electrical automation equipment refers to finished products with certain functions;
in order to ensure normal operation of the device, the electrical line of the device needs to be protected, and a fuse is generally used for protecting a circuit, but the existing fuse cannot be automatically restored to be completely disconnected, or the existing fuse is automatically restored for a period of time to cause the circuit to be incapable of being completely disconnected, and the overload degree is not displayed, so that substantial assistance cannot be provided for subsequent maintenance, and the overall use effect is poor, so that a safe and effective circuit protection device is needed.
Disclosure of Invention
The invention aims to solve the problem of poor overload protection effect in the prior art, and provides an electromechanical line overload protection device.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides an electromechanical line overload protection equipment, includes the shell, the inner wall of shell is fixed with the power connection box, the inner wall of power connection box is connected with the power connection piece through reset spring, the inner wall of power connection box is fixed with a pair of power connection board with power connection piece looks butt, the inner wall of shell is fixed with the electro-magnet that corresponds with power connection piece position, the upper end of electro-magnet is fixed with the buffer box, the lateral wall penetration of shell is equipped with the guard box, the tip of power connection piece is fixed with positive briquetting, the inner wall of power connection box is fixed with back briquetting, the inside short-circuit protection mechanism that is equipped with of guard box.
In the above-mentioned electromechanical line overload protection device, the short-circuit protection mechanism includes a top block in sealed sliding connection with the inner wall of the protection box, a pair of contacts are fixed on the inner wall of the protection box, a reset plate is connected to the side wall of the protection box in a penetrating and sliding manner, and a power connector is fixed at one end of the reset plate located inside the protection box.
In the above-mentioned electromechanical line overload protection device, the inner wall of the housing is fixed with a capacitor and a diode, the side wall of the protection box is penetrated and provided with a light hole, the side wall of the buffer box is fixed with a spotlight corresponding to the position of the light hole, and the side wall of the housing is penetrated and provided with a color plate corresponding to the position of the light hole.
In the electromechanical line overload protection device, the positive pressure block and the back pressure block are both piezoelectric ceramics, electrorheological fluid is filled in the protection box, non-Newtonian fluid is filled in the buffer box, and the top block is a transparent plate with color bands on the surface.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, by arranging the electromagnet, when overload phenomenon occurs on the circuit, the electromagnet can generate an effective strong magnetic field, so that the power receiving block is attracted to move, then the power receiving block is separated from the power receiving plate, and the whole circuit is interrupted, so that the circuit is protected, the circuit is safe, and the circuit is not directly powered off in the initial stage of overload, so that a user can be given a certain time to recover the error operation of the device without influencing the whole operation of the device, and the device is more reasonable and humanized;
2. according to the invention, the reset spring is arranged, so that the power-on block can be automatically reset under the action of elasticity after power failure, manual operation is reduced, the use is more convenient, the non-Newtonian fluid is filled in the buffer box, and the power-on block is sunk into the non-Newtonian fluid in the process of downward power failure, so that the reset process of the power-on block is greatly hindered, and a certain time is required for overall recovery, so that a user can be given enough time to treat overload faults;
3. according to the invention, the positive piezoelectric block is arranged, so that in the power-off process, the positive piezoelectric block collides with non-Newtonian fluid to generate power, so that electrorheological fluid expands to push the top block to move, the upper color band of the top block is transposed, and after power-off, the capacitor discharges to supply the spotlight, so that the spotlight light can cause different color changes after passing through the top block and falling on the color-developing plate, and further, the overload degree and overload equipment are judged, so that the subsequent rapid maintenance is facilitated;
4. according to the invention, by arranging the back pressing block, when the power receiving block is reset, the back pressing block is subjected to extremely large impact to generate power, so that the electrorheological fluid pushes the top block to reset, the top block can move to develop color when in fault, the top block is automatically restored after being electrified, the whole use is more convenient and faster without manual control, and when a circuit is in line-passing short circuit, the top block is excessively shifted to impact the power receiving head, so that the whole circuit is thoroughly interrupted and is not automatically restored, and the circuit safety is effectively protected;
drawings
Fig. 1 is a schematic structural diagram of an overload protection device for an electromechanical circuit according to the present invention;
fig. 2 is a side cross-sectional view of a portion of a protection box in an electromechanical line overload protection apparatus according to the present invention;
fig. 3 is a circuit diagram of a capacitor portion of an overload protection device for an electromechanical circuit according to the present invention.
In the figure: 1 shell, 2 power connection box, 3 reset spring, 4 power connection block, 5 power connection plate, 6 electromagnet, 7 buffer box, 8 positive pressure block, 9 back pressure block, 10 protection box, 11 top block, 12 contact, 13 reset plate, 14 power connection head, 15 light hole, 16 shot-light, 17 color development plate, 18 capacitor, 19 diode.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1-3, an overload protection device for an electromechanical circuit comprises a housing 1, wherein an electric connection box 2 is fixed on the inner wall of the housing 1, an electric connection block 4 is connected on the inner wall of the electric connection box 2 through a reset spring 3, a pair of electric connection plates 5 which are propped against the electric connection block 4 are fixed on the inner wall of the electric connection box 2, an electromagnet 6 corresponding to the electric connection block 4 is fixed on the inner wall of the housing 1, a buffer box 7 is fixed on the upper end of the electromagnet 6, a protection box 10 is penetrated through the side wall of the housing 1, a positive pressure block 8 is fixed on the end part of the electric connection block 4, a back pressure block 9 is fixed on the inner wall of the electric connection box 2, and a short circuit protection mechanism is arranged inside the protection box 10.
The short-circuit protection mechanism comprises a top block 11 which is in sealed sliding connection with the inner wall of the protection box 10, a pair of contacts 12 are fixed on the inner wall of the wave protection box 10, a reset plate 13 is connected with the side wall of the protection box 10 in a penetrating and sliding manner, and a connector 14 is fixed at one end of the reset plate 13 positioned in the protection box 10; a capacitor 18 and a diode 19 are fixed on the inner wall of the housing 1, the capacitor 18 is used for storing electricity, the diode 19 ensures effective electricity storage, the side wall of the protection box 10 is penetrated and provided with a light hole 15, the side wall of the buffer box 7 is fixed with a spotlight 16 corresponding to the position of the light hole 15, and the side wall of the housing 1 is penetrated and provided with a color developing plate 17 corresponding to the position of the light hole 15.
The positive briquetting 8 and the back briquetting 9 are piezoelectric ceramics, electricity is generated after being pressed, the protection box 10 is internally filled with electrorheological fluid and is positioned at two sides of the top block 11, one side is used for shifting the top block 11, the other side is used for subsequent resetting, the friction coefficient of the top block 11 and the protection box 10 is larger, the whole friction force resistance overcomes the gravity of the self and the electrorheological fluid carried by the self, the non-Newtonian fluid is filled in the buffer box 7, the top block 11 is a transparent plate with color strips on the surface, the color strips are sequentially adhered on the surface of the top block 11 according to the color depth, so that when light passes through, the color is attached, the overload degree is convenient for a user to know, the overload equipment is convenient to judge, and the whole maintenance is convenient.
In the invention, when overload condition occurs in the working process of equipment, the current of a circuit in which an electromagnet 6 is positioned is increased, so that the generated magnetic field is enhanced, and the electromagnet 6 is further caused to have enough magnetic force to attract a power connection block 4, so that the power connection block 4 drives a positive pressing block 8 to move downwards, the power connection block 4 firstly keeps a section of state in contact with a power connection plate 5 in the lower and process of the power connection block 4, then the positive pressing block 8 collides with non-Newtonian fluid in a buffer box 7, the power connection block 4 is separated from the power connection plate 5, and then the positive pressing block 8 and the power connection block 4 are sunk into the non-Newtonian fluid;
in the process, the electric connection line is kept in an unblocked state in the initial stage, if only the line current is jumped or the user has the ready device for removing the overload, the whole line is not powered off immediately, the user can be given a certain time to recover the error operation of the user without affecting the whole operation of the device, and the method is more reasonable and humanized;
when the positive pressure block 8 is connected with the non-Newtonian fluid for the first time, the positive pressure block 8 moves down rapidly under the action of magnetic force, so that direct strong collision occurs between the positive pressure block 8 and the non-Newtonian fluid, the positive pressure block 8 is caused to generate electricity under the pressure of reaction, the positive pressure block acts on electrorheological fluid in the protection box 10, and then the electrorheological fluid is solidified and expanded, and pushes the top block 11 to move, so that the color band of the top block 11 at the position of the light hole 15 is changed;
after the positive pressure block 8 collides, the positive pressure block 8 is extruded by the non-Newtonian fluid under the action of magnetic force, so that the positive pressure block is accelerated to sink into the non-Newtonian fluid at a certain speed until the power receiving block 4 is separated from the power receiving plate 5, the whole circuit is interrupted, the electromagnet loses magnetism, the power receiving block 4 performs reset motion under the action of the elastic force of the reset spring 3, but the positive pressure block 8 is firstly decelerated and moved down, and then moves up again after the speed is zero, in the whole process, the movement of the positive pressure block 8 is blocked by the non-Newtonian fluid, so that the upward movement speed is limited, the power receiving block 4 is contacted with the power receiving plate 5 again to complete the automatic power recovery process, a certain time is required for a user to process the overload problem, and the manual operation can be reduced after the automatic reset, so that the labor is saved;
when the positive pressure block 8 is immersed in the non-newton fluid, the whole circuit is interrupted, so that the capacitor 18 supplies power to the shot lamp 16, so that the shot lamp 16 emits light to the light hole 15, the light falls on the color plate 17 after passing through the top block 11, so that the color of the color band on the top block 11 effectively falls on the color plate 17 along with the light, the corresponding color can be seen on the color plate 17, the type of the color depends on the movement distance of the top block 11, namely the deformation degree of the electrorheological fluid, namely the magnitude of the collision voltage, namely the intensity of the collision of the positive pressure block 8, namely the magnetic magnitude of the electromagnet 6, and the final color is determined by the magnitude of the overload current, namely the overload degree of the overload current can be judged according to the specific change degree of the color, namely the overload-causing equipment can be judged to a certain extent, so that the personnel maintenance is facilitated;
after the power receiving block 4 and the positive pressure block 8 are separated from the limitation of non-Newtonian fluid, the power receiving block and the positive pressure block quickly move upwards under the action of the elastic force of the return spring 3 and then collide with the back pressure block 9 strongly after acceleration, so that the back pressure block 9 is pressed to generate power and supply the electrorheological fluid of the other part of the protection box 10, the electrorheological fluid of the part is solidified and collides with the push-back top block 11, the push-back top block 11 is reset, and the whole equipment is automatically restored, so that the follow-up use is facilitated;
when the circuit is short-circuited, the current in the circuit is increased rapidly, so that the collision degree of the positive pressure block 8 and the non-Newtonian fluid is increased rapidly, the current fluid is deformed severely, the top block 11 is displaced excessively, the top block 11 collides with the connector 14, the connector 14 breaks away from the contact 12 after collision, the whole circuit is completely interrupted, the reset plate 13 is reset to be recovered after waiting for human repair, and the circuit is not recovered automatically, namely, the circuit is ensured not to be impacted severely repeatedly by the short-circuit current.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (1)
1. The utility model provides an electromechanical line overload protection equipment, includes shell (1), its characterized in that, the inner wall of shell (1) is fixed with electric connection box (2), the inner wall of electric connection box (2) is connected with electric connection piece (4) through reset spring (3), the inner wall of electric connection box (2) is fixed with a pair of electric connection board (5) that offsets with electric connection piece (4), the inner wall of shell (1) is fixed with electro-magnet (6) that correspond with electric connection piece (4) position, the upper end of electro-magnet (6) is fixed with buffer box (7), the lateral wall penetration of shell (1) is equipped with guard box (10), the tip of electric connection piece (4) is fixed with malleation piece (8), the inner wall of electric connection box (2) is fixed with backpressure piece (9), guard box (10) inside is equipped with short-circuit protection mechanism;
the short-circuit protection mechanism comprises a top block (11) which is in sealing sliding connection with the inner wall of a protection box (10), a pair of contacts (12) are fixed on the inner wall of the protection box (10), a reset plate (13) is connected with the side wall of the protection box (10) in a penetrating and sliding manner, and a power connector (14) is fixed at one end of the reset plate (13) positioned in the protection box (10);
a capacitor (18) and a diode (19) are fixed on the inner wall of the shell (1), a light hole (15) is formed in the side wall of the protection box (10) in a penetrating manner, a spotlight (16) corresponding to the position of the light hole (15) is fixed on the side wall of the buffer box (7), and a color developing plate (17) corresponding to the position of the light hole (15) is arranged in the side wall of the shell (1) in a penetrating manner;
the positive pressure block (8) and the back pressure block (9) are both made of piezoelectric ceramics, electrorheological fluid is filled in the protection box (10), non-Newtonian fluid is filled in the buffer box (7), and the top block (11) is a transparent plate with color bands on the surface;
when overload condition occurs in the working process of the equipment, the current of a circuit where the electromagnet (6) is located is increased, so that the magnetic field generated by the circuit is increased, the electromagnet (6) is further caused to have enough magnetic force to attract the electricity receiving block (4), the electricity receiving block (4) drives the positive pressing block (8) to move downwards, the electricity receiving block (4) is firstly kept in a state of being contacted with the electricity receiving plate (5) in the downward moving process of the electricity receiving block (4), the positive pressing block (8) collides with non-Newtonian fluid in the buffer box (7), then the electricity receiving block (4) is separated from the electricity receiving plate (5), and then the positive pressing block (8) and the electricity receiving block (4) sink into the non-Newtonian fluid;
when the positive pressure block (8) is connected with the non-Newtonian fluid for the first time, the positive pressure block (8) moves downwards rapidly under the action of magnetic force, so that direct strong collision occurs between the positive pressure block (8) and the non-Newtonian fluid, the positive pressure block (8) is subjected to reactive pressure to generate electricity and acts on electrorheological fluid in the protection box (10), and then the electrorheological fluid is solidified and expanded and pushes the top block (11) to move, so that the color band of the top block (11) at the position of the unthreaded hole (15) is changed;
after the positive pressure block (8) collides, the positive pressure block is extruded by the non-Newtonian fluid under the action of magnetic force, so that the positive pressure block is accelerated to sink into the non-Newtonian fluid at a certain speed until the power receiving block (4) is separated from the power receiving plate (5), the whole circuit is interrupted, the electromagnet loses magnetism, the power receiving block (4) performs reset motion under the action of the elastic force of the reset spring (3), but the positive pressure block (8) is firstly decelerated and moves downwards, and moves upwards again after the speed is zero, in the whole process, the movement of the positive pressure block (8) is blocked by the non-Newtonian fluid, so that the upward movement speed is limited, and the power receiving block (4) is contacted with the power receiving plate (5) again to finish the automatic power recovery process;
when the positive pressure block (8) is immersed in non-Newtonian fluid, the whole circuit is interrupted, so that the capacitor (18) supplies power to the shot lamp (16), the shot lamp (16) emits light to the light hole (15), the light falls on the color development plate (17) after passing through the top block (11), the color of the color band on the top block (11) effectively falls on the color development plate (17) along with the light, the corresponding color can be seen on the color development plate (17), and the type of the color depends on the movement distance of the top block (11), namely the deformation degree of the electrorheological fluid, namely the size of collision voltage, namely the intensity of collision of the positive pressure block (8), namely the magnetism of the electromagnet (6), and the final color is determined by the size of overload current;
after the power connection block (4) and the positive pressure block (8) are separated from the limitation of non-Newtonian fluid, the power connection block moves upwards rapidly under the action of the elastic force of the return spring (3), and then the power connection block and the back pressure block (9) are subjected to violent collision after acceleration, so that the back pressure block (9) is pressed to generate electricity to supply electrorheological fluid of the other part of the protection box (10), the electrorheological fluid is solidified, collided and pushed back to the top block (11), the top block (11) is reset, and the whole equipment is automatically restored, so that the subsequent use is facilitated;
when the circuit is short-circuited, the current in the circuit is increased rapidly, so that the collision degree of the positive pressure block (8) and the non-Newtonian fluid is increased rapidly, the current fluid is deformed severely, the top block (11) is displaced excessively, the top block (11) collides with the connector (14), the connector (14) is separated from the contact (12) after collision, the whole circuit is interrupted thoroughly, the reset plate (13) is reset again after waiting for manual repair to be recovered, and the circuit is not recovered automatically, namely the circuit is prevented from repeated severe impact of the short-circuit current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129666.9A CN112201551B (en) | 2020-10-21 | 2020-10-21 | Overload protection equipment for electromechanical circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129666.9A CN112201551B (en) | 2020-10-21 | 2020-10-21 | Overload protection equipment for electromechanical circuit |
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| Publication Number | Publication Date |
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| CN112201551A CN112201551A (en) | 2021-01-08 |
| CN112201551B true CN112201551B (en) | 2023-10-24 |
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| CN202011129666.9A Active CN112201551B (en) | 2020-10-21 | 2020-10-21 | Overload protection equipment for electromechanical circuit |
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| CN113223879B (en) * | 2021-04-12 | 2023-04-14 | 深圳市译梵科技有限公司 | High-reliability power protection equipment |
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| CN201690222U (en) * | 2010-04-27 | 2010-12-29 | 卜春国 | Time-delay overload short-circuit protector |
| CN207250348U (en) * | 2017-08-08 | 2018-04-17 | 北京青年路混凝土有限公司 | A kind of emergency stop switch protective device |
| CN108861947A (en) * | 2018-08-16 | 2018-11-23 | 东莞市皓奇企业管理服务有限公司 | Elevator loses the application method of protective device |
| CN209843600U (en) * | 2019-03-28 | 2019-12-24 | 江苏省徐州技师学院 | Novel oil-cooled arc extinguishing breaker structure |
| CN110828250A (en) * | 2019-11-18 | 2020-02-21 | 曲相霖 | Overcurrent processor for electric power |
| CN111180281A (en) * | 2020-01-16 | 2020-05-19 | 朱燚鹏 | Automatic overcurrent circuit breaking protector |
| CN111508797A (en) * | 2020-05-08 | 2020-08-07 | 吴军 | Self-recovery fuse |
| CN111599653A (en) * | 2020-05-08 | 2020-08-28 | 吴军 | Nondestructive fuse based on non-Newtonian fluid |
| CN111739769A (en) * | 2020-07-21 | 2020-10-02 | 郭德琼 | Vehicle-mounted direct current fuse |
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