CN113078626B - Device for power distribution overvoltage protection - Google Patents
Device for power distribution overvoltage protection Download PDFInfo
- Publication number
- CN113078626B CN113078626B CN202110391844.3A CN202110391844A CN113078626B CN 113078626 B CN113078626 B CN 113078626B CN 202110391844 A CN202110391844 A CN 202110391844A CN 113078626 B CN113078626 B CN 113078626B
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- cover
- shell
- embedded
- overvoltage protection
- power distribution
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a device for overvoltage protection of a power distribution network. Comprises a bottom shell, the cover shell is embedded in the bottom shell, the warning windows are uniformly embedded in one side of the top end of the outer wall of the cover shell, the piezoresistor disc is embedded in the middle of the inner part of the cover shell, the tripping spring is rotatably arranged on one side of the outer part of the piezoresistor disc, the fusion tin block is fused at one side of the bottom end outside the tripping spring, the red warning film is sleeved and arranged at one side of the top end inside the cover shell, which is close to the warning window, the fire extinguishing bucket is embedded in the middle of the top end of the interior of the cover shell, the movable cover plate is opened to release dry powder fire extinguishing particles in the fire extinguishing bucket in the cover shell by stirring the contact piece at the bottom end of the fire extinguishing bucket through the tripping spring, high-temperature fire extinguishing protection in the cover shell is realized, and the sensitivity and the safety performance of the device in overvoltage protection are ensured when the device is used.
Description
Technical Field
The invention relates to the technical field of power distribution protection equipment, in particular to a power distribution overvoltage protection device.
Background
The surge protector can conduct and shunt in a very short time when peak current or voltage is suddenly generated in an electric loop or a communication line due to external interference, so that damage of surge to other equipment in the loop is avoided.
However, the existing device for power distribution overvoltage protection cannot realize high-temperature fire extinguishing protection in the cover shell in use, so that sensitivity and safety performance of the device in overvoltage protection are poor when the device is used, and installation errors are easily inserted and installed when the device is installed on a traditional zero line and a traditional fire line, so that safety accidents are caused.
Disclosure of Invention
The invention aims to provide a power distribution overvoltage protection device, which solves the problems that the existing power distribution overvoltage protection device in the background art cannot realize high-temperature fire extinguishing protection in a cover shell, so that the sensitivity and safety performance of the device are poor when the device is used for protecting overvoltage, and the traditional zero line and fire line are easily inserted and installed wrongly to cause safety accidents.
In order to achieve the purpose, the invention provides the following technical scheme: a device for power distribution overvoltage protection comprises a bottom shell, a zero line, a live wire and a ground wire, wherein the zero line is embedded in one side of the top end outside the bottom shell, the live wire is embedded in the other side of the top end outside the bottom shell, the ground wire is embedded in the middle of the bottom end of the bottom shell, a protection mechanism is embedded in the top end outside the bottom shell, a wiring mechanism is embedded in the top end outside the bottom shell, the protection mechanism is fixedly connected with the bottom shell through a fixing mechanism, the protection mechanism is used for performing overvoltage protection on a circuit in an overvoltage state, the wiring mechanism is used for fixedly inserting the zero line and the live wire, and the fixing mechanism is used for fixedly connecting the protection mechanism with the bottom shell;
wiring mechanism includes wiring end cover, circular joint chair, square joint chair, activity support arm, activity ejector pad and supporting spring, the embedding of wiring end cover is installed the outside top of drain pan, circular joint chair movable mounting be in the inside one side of wiring end cover, square joint chair is installed the inside opposite side of wiring end cover, the articulated installation of activity support arm is in circular joint chair outer wall one side, the activity ejector pad is installed the outside one side of activity support arm, supporting spring installs the outside one side of square joint chair.
Further, protection machanism includes that lid shell, warning window, piezo-resistor disc, trip spring, sintering tin piece, red warning membrane, fire extinguishing fighting, removable cover, contact and magnetism inhale the piece, the lid shell embedding is installed inside the drain pan, the even embedding of warning window is installed lid shell outer wall top one side, the piezo-resistor disc embedding is installed the inside middle part of lid shell, trip spring rotates to be installed outside piezo-resistor disc one side, sintering tin piece sintering is in outside bottom one side of trip spring, red warning membrane cup joints and installs the inside top of lid shell is close to warning window one side, fire extinguishing fighting embedding is installed the inside top middle part of lid shell.
Furthermore, the movable cover plate is rotatably installed at the bottom end of the outer portion of the cover shell, the contact piece is installed on one side of the outer portion of the movable cover plate, the magnetic suction block is installed on one side of the bottom end of the outer wall of the fire extinguishing bucket in an embedded mode, and dry powder fire extinguishing particles are placed inside the fire extinguishing bucket.
Furthermore, the inside of the wiring end cover corresponds to the zero line and the outside of the live wire are all sleeved with sealing rubber rings.
Further, the fixing mechanism comprises an inner clamping plate, a movable clamping plate, a fixing groove, an occlusion plate and a clamping pin, the inner clamping plate is fixedly installed at the top end of the inner wall of the bottom shell, the movable clamping plate is installed on one side of the top end of the outer portion of the cover shell, the fixing groove is formed in one side of the inner clamping plate and one side of the outer wall of the movable clamping plate, the occlusion plate is installed on one side of the bottom end of the inner clamping plate, and the clamping pin is installed on one side of the outer wall of the bottom shell in an embedded mode.
Furthermore, the bottom end of the bayonet lock is rectangular, the top end of the bayonet lock is cylindrical, and the bayonet lock is fixedly connected with the bottom shell through threads.
Furthermore, binding post is all installed to inside both sides of lid shell, fixed slot has been seted up to drain pan outer wall bottom, just the screw is seted up to the inside both sides of fixed slot.
Furthermore, the outer wall of the wiring end cover is evenly embedded with a fastening backing ring at the position corresponding to the circular connecting seat.
Furthermore, the bottom shell and the cover shell are externally provided with an overhauling cover plate through nuts in an embedded mode.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, by arranging the protection mechanism, when the voltage in the power distribution network is overlarge, the overvoltage can be eliminated through the ground wire by changing the resistance value of the piezoresistor disc at the wiring terminal from high to low, the tripping spring can deflect by melting the temperature of the molten tin block, the red warning film is pressed to the warning window to warn a worker, and the movable cover plate is opened to release dry powder fire extinguishing particles in the fire extinguishing bucket in the cover shell by shifting the contact plate at the bottom end of the fire extinguishing bucket through the tripping spring, so that the high-temperature fire extinguishing protection in the cover shell is realized, and the sensitivity and the safety performance of the device in overvoltage protection are ensured.
Through being provided with wiring mechanism, when pegging graft zero line and live wire in proper order and fix inside the terminal cover of working a telephone switchboard, can match the zero line through circular joint chair and connect, and activity support arm through circular joint chair department activity in proper order can be with square joint chair to one side activity, compress supporting spring, and carry out the accordant connection to the live wire through square joint chair, thereby when having solved traditional zero line and live wire installation, the installation error of pegging graft easily, lead to the problem of incident, zero line and live wire accuracy when the installation have been guaranteed.
When being connected fixedly between protection mechanism and the drain pan through being provided with fixed establishment, under the effect of interlock board, carry out the joint through the interior cardboard of drain pan department and the movable cardboard of protection mechanism top department to bayonet lock through fixed slot department is connected fixedly to connecting between inside cardboard and the movable cardboard, thereby has guaranteed the fastness of being connected between protection mechanism and the drain pan, has improved the convenience when protection mechanism later stage dismouting is maintained.
Drawings
FIG. 1 is a schematic perspective view of an apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic front view of the apparatus in the embodiment of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the interior of the cover shell in the embodiment of FIG. 1;
FIG. 4 is a schematic view of the mounting structure of the removable cover in the embodiment of FIG. 1;
FIG. 5 is a schematic cross-sectional view of the interior of the terminal cover in the embodiment of FIG. 1;
FIG. 6 is a perspective view of the inner clamping plate of the embodiment of FIG. 1;
FIG. 7 is a perspective view of the bayonet mount of the embodiment of FIG. 1.
Reference numerals: 1. a bottom case; 2. a protection mechanism; 201. a cover shell; 202. a warning window; 203. a varistor sheet; 204. a trip spring; 205. sintering the tin blocks; 206. a red warning film; 207. extinguishing the fire bucket; 208. a removable cover plate; 209. a contact piece; 210. a magnetic block; 3. a zero line; 4. a live line; 5. a wiring mechanism; 501. a wiring end cover; 502. a circular connecting seat; 503. a square connecting seat; 504. a movable support arm; 505. a movable push block; 506. a support spring; 6. a fixing mechanism; 601. an inner clamping plate; 602. a movable clamping plate; 603. fixing grooves; 604. a bite plate; 605. a bayonet lock; 7. a ground line; 8. fastening a backing ring; 9. a wiring terminal; 10. and fixing the clamping groove.
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. 1-7 together, a power distribution overvoltage protection device includes a bottom case 1, a zero line 3, a fire line 4 and a ground line 7, the zero line 3 is embedded in one side of the top end of the bottom case 1, the fire line 4 is embedded in the other side of the top end of the bottom case 1, the ground line 7 is embedded in the middle of the bottom end of the bottom case 1, a protection mechanism 2 is embedded in the bottom case 1, the protection mechanism 2 includes a cover 201, a warning window 202, a varistor 203, a trip spring 204, a solder block 205, a red warning film 206, a fire extinguishing bucket 207, a movable cover 208, a contact 209 and a magnetic attraction block 210, the cover 201 is embedded in the bottom case 1, the warning window 202 is uniformly embedded in one side of the top end of the outer wall of the cover 201, the varistor 203 is embedded in the middle of the cover 201, the trip spring 204 is rotatably installed on one side of the outside of the varistor 203, the fusing tin block 205 is fused on one side of the bottom end outside the tripping spring 204, the red warning film 206 is sleeved and installed on one side of the top end inside the cover shell 201 close to the warning window 202, the fire extinguishing bucket 207 is embedded and installed in the middle of the top end inside the cover shell 201, the movable cover plate 208 is rotatably installed at the bottom end outside the cover shell 201, the contact plate 209 is installed on one side outside the movable cover plate 208, the magnetic attraction block 210 is embedded and installed on one side of the bottom end of the outer wall of the fire extinguishing bucket 207, dry powder fire extinguishing particles are placed inside the fire extinguishing bucket 207, when the voltage in the power distribution network is overlarge, the overvoltage can be eliminated through the ground wire 7 by the change of the resistance value of the piezoresistor sheet 203 at the wiring terminal 9 from high to low, and the melting of the contact plate 209 at the bottom end of the fire extinguishing bucket 207 is realized through the rise of the temperature at the fusing tin block 205, so that the tripping spring 204 can deflect, the red warning film 206 is pressed to the warning window 202 to warn the working personnel, and simultaneously, the contact plate 209 at the bottom end of the fire extinguishing bucket 207 is stirred through the tripping spring 204, the movable cover plate 208 is opened to release dry powder fire extinguishing particles in the fire extinguishing bucket 207 inside the cover shell 201, so that high-temperature fire extinguishing protection for the cover shell 201 is realized, and the sensitivity and the safety performance of the device during overvoltage protection are guaranteed.
The wiring mechanism 5 comprises a wiring end cover 501, a circular joint seat 502, a square joint seat 503, a movable support arm 504, a movable push block 505 and a support spring 506, wherein the wiring end cover 501 is embedded in the top end of the outer part of the bottom case 1, the circular joint seat 502 is movably arranged on one side of the inner part of the wiring end cover 501, the square joint seat 503 is arranged on the other side of the inner part of the wiring end cover 501, the movable support arm 504 is hinged on one side of the outer wall of the circular joint seat 502, the movable push block 505 is arranged on one side of the outer part of the movable support arm 504, the support spring 506 is arranged on one side of the outer part of the square joint seat 503, when the zero wire 3 and the live wire 4 are sequentially inserted and fixed in the wiring end cover 501, the circular joint seat 502 can be used for matching connection of the zero wire 3, the movable support arm 504 at the circular joint seat 502 can be sequentially moved to one side of the square joint seat 503, the support spring 506 is compressed, and the live wire 4 is matched and connected through the square joint 503, therefore, the problem of safety accidents caused by the fact that the traditional zero line 3 and the traditional live wire 4 are easily inserted and installed in a wrong mode is solved, and accuracy and convenience in installation of the zero line 3 and the live wire 4 are guaranteed.
In order to guarantee the sealing dustproof performance of the splicing part inside the wiring end cover 501, the dust is prevented from falling into the wiring end cover 501, the short circuit damage of the device is caused, and sealing rubber rings are installed on the portions, corresponding to the zero line 3 and the live wire 4, inside the wiring end cover 501 in a sleeved mode.
The fixing mechanism 6 comprises an inner clamping plate 601, a movable clamping plate 602, a fixing groove 603, a snap plate 604 and a bayonet lock 605, wherein the inner clamping plate 601 is fixedly arranged at the top end of the inner wall of the bottom shell 1, the movable clamping plate 602 is arranged at one side of the top end of the outer part of the cover shell 201, the fixing groove 603 is arranged at one side of the outer walls of the inner clamping plate 601 and the movable clamping plate 602, the snap plate 604 is arranged at one side of the bottom end of the inner clamping plate 601, the bayonet lock 605 is embedded and arranged at one side of the outer wall of the bottom shell 1, the bottom end of the bayonet lock 605 is rectangular, the top end of the bayonet lock 605 is cylindrical, the bayonet lock 605 is fixedly connected with the bottom shell 1 through threads, when the protection mechanism 2 is fixedly connected with the bottom shell 1, under the action of the snap plate 604, the inner clamping plate 601 at the bottom shell 1 is clamped with the movable clamping plate 602 at the top end of the protection mechanism 2, and the bayonet lock 605 at the fixing groove 603 is fixedly connected between the inner clamping plate 601 and the movable clamping plate 602, so that the connection between the protection mechanism 2 and the bottom shell 1 is ensured, the convenience performance when having improved 2 later stages of protection mechanism dismouting maintenance.
In order to ensure the firmness of splicing the zero line 3 and the live wire 4 at the position of the wiring end cover 501, the fastening backing ring 8 is uniformly embedded and installed at the position, corresponding to the circular connecting seat 502, of the outer wall of the wiring end cover 501, which is prevented from loosening and falling off of the zero line 3 and the live wire 4.
In order to repair and maintain the insides of the bottom case 1 and the cover case 201, repair cover plates are embedded outside the bottom case 1 and the cover case 201 through nuts.
In summary, in the power distribution overvoltage protection device provided by the present invention, during operation, first, under the action of the engaging plate 604, the inner clamping plate 601 at the bottom case 1 is engaged with the movable clamping plate 602 at the top end of the protection mechanism 2, and the inner clamping plate 601 and the movable clamping plate 602 are connected and fixed by the bayonet 605 at the fixed groove 603, so as to ensure the firmness of the connection between the protection mechanism 2 and the bottom case 1.
Then, the zero line 3 can be connected in a matching manner through the circular joint 502, the square joint 503 can be moved to one side through the sequential movement of the movable support arms 504 at the circular joint 502, the support spring 506 is compressed, and the live wire 4 is connected in a matching manner through the square joint 503, so that the problem of safety accidents caused by the fact that the traditional zero line 3 and live wire 4 are easily inserted and installed wrongly is solved;
finally, when the voltage in the distribution network is too large, the resistance value of the varistor 203 at the connecting terminal 9 is changed from high to low, the overvoltage can be eliminated through the ground wire 7, the fuse 205 is melted by the temperature rise of the fuse, the tripping spring 204 can deflect, the red warning film 206 is pressed to the warning window 202 to warn the worker, the tripping spring 204 is used for shifting the contact sheet 209 at the bottom end of the fire extinguishing bucket 207, the movable cover plate 208 is opened to release dry powder fire extinguishing particles inside the fire extinguishing bucket 207 inside the cover shell 201, the high-temperature fire extinguishing protection inside the cover shell 201 is realized, and the sensitivity and the safety performance of the device during the overvoltage protection are ensured.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (9)
1. A device for power distribution overvoltage protection comprises a bottom shell (1), a zero line (3), a live wire (4) and a ground wire (7), wherein the zero line (3) is embedded in one side of the top end of the outer part of the bottom shell (1), the live wire (4) is embedded in the other side of the top end of the outer part of the bottom shell (1), and the ground wire (7) is embedded in the middle of the bottom end of the bottom shell (1);
the overvoltage protection device is characterized in that a protection mechanism (2) is embedded in the bottom shell (1), a wiring mechanism (5) is embedded in the top end of the outer portion of the bottom shell (1), the protection mechanism (2) is fixedly connected with the bottom shell (1) through a fixing mechanism (6), the protection mechanism (2) is used for performing overvoltage protection on a circuit in an overvoltage state, the wiring mechanism (5) is used for fixedly inserting the zero line (3) and the live line (4), and the fixing mechanism (6) is used for fixedly connecting the protection mechanism (2) with the bottom shell (1);
wiring mechanism (5) are including wiring end cover (501), circular connection seat (502), square connection seat (503), activity support arm (504), activity ejector pad (505) and supporting spring (506), wiring end cover (501) embedding is installed drain pan (1) outside top, circular connection seat (502) movable mounting be in wiring end cover (501) inside one side, square connection seat (503) are installed wiring end cover (501) inside opposite side, activity support arm (504) are articulated to be installed circular connection seat (502) outer wall one side, activity ejector pad (505) are installed outside one side of activity support arm (504), supporting spring (506) are installed outside one side of square connection seat (503).
2. The device for power distribution overvoltage protection according to claim 1, wherein the protection mechanism (2) comprises a cover shell (201), a warning window (202), a varistor sheet (203), a trip spring (204), a sintered tin block (205), a red warning film (206), a fire bucket (207), a movable cover plate (208), a contact sheet (209) and a magnetic suction block (210), the cover shell (201) is embedded in the bottom shell (1), the warning window (202) is uniformly embedded in one side of the top end of the outer wall of the cover shell (201), the varistor sheet (203) is embedded in the middle of the inside of the cover shell (201), the trip spring (204) is rotatably installed on one side of the outside of the varistor sheet (203), the sintered tin block (205) is sintered on one side of the bottom end of the outside of the trip spring (204), and the red warning film (206) is sleeved on one side of the top end of the inside of the cover shell (201) and is close to the warning window (202) (202) And on one side, the fire extinguishing bucket (207) is embedded in the middle of the top end in the cover shell (201).
3. The device for power distribution overvoltage protection according to claim 2, wherein the movable cover plate (208) is rotatably installed at the bottom end of the outer portion of the cover shell (201), the contact piece (209) is installed at one side of the outer portion of the movable cover plate (208), the magnetic attraction block (210) is embedded and installed at one side of the bottom end of the outer wall of the fire extinguishing chamber (207), and dry powder fire extinguishing particles are placed inside the fire extinguishing chamber (207).
4. The device for power distribution overvoltage protection according to claim 3, wherein sealing rubber rings are sleeved inside the wiring end cover (501) corresponding to the zero line (3) and the live line (4).
5. The device for power distribution overvoltage protection according to claim 2, wherein the fixing mechanism (6) comprises an inner clamping plate (601), a movable clamping plate (602), a fixing groove (603), a snap plate (604) and a bayonet (605), the inner clamping plate (601) is fixedly installed at the top end of the inner wall of the bottom shell (1), the movable clamping plate (602) is installed at one side of the top end of the outer portion of the cover shell (201), the fixing groove (603) is opened at one side of the outer walls of the inner clamping plate (601) and the movable clamping plate (602), the snap plate (604) is installed at one side of the bottom end of the inner clamping plate (601), and the bayonet (605) is installed at one side of the outer wall of the bottom shell (1) in an embedding manner.
6. The device for power distribution overvoltage protection according to claim 5, wherein the bottom end of the bayonet lock (605) is rectangular, the top end of the bayonet lock (605) is cylindrical, and the bayonet lock (605) is fixedly connected with the bottom shell (1) through threads.
7. The device for power distribution overvoltage protection according to claim 2, wherein the wiring terminals (9) are mounted on two sides inside the cover shell (201), the bottom end of the outer wall of the bottom shell (1) is provided with a fixing clamping groove (10), and two sides inside the fixing clamping groove (10) are provided with screw holes.
8. The device for power distribution overvoltage protection according to claim 1, wherein a fastening gasket ring (8) is uniformly embedded and mounted on the outer wall of the terminal cover (501) at the position corresponding to the circular connecting seat (502).
9. A device for power distribution overvoltage protection according to claim 2, characterized in that said bottom shell (1) and said cover shell (201) are externally fitted with access panels by means of nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110391844.3A CN113078626B (en) | 2021-04-13 | 2021-04-13 | Device for power distribution overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110391844.3A CN113078626B (en) | 2021-04-13 | 2021-04-13 | Device for power distribution overvoltage protection |
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| CN113078626A CN113078626A (en) | 2021-07-06 |
| CN113078626B true CN113078626B (en) | 2022-09-16 |
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| CN202110391844.3A Active CN113078626B (en) | 2021-04-13 | 2021-04-13 | Device for power distribution overvoltage protection |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200953471Y (en) * | 2006-10-05 | 2007-09-26 | 王文杰 | Surge protector |
| CN111654014A (en) * | 2020-08-06 | 2020-09-11 | 南京翔维物流设备制造有限公司 | Electric power engineering surge protector |
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| US5001017A (en) * | 1988-12-06 | 1991-03-19 | Alhamad Shaikh G M Y | Compositions of matter for stopping fires, explosions and oxidations of materials and build up of electrostatic charges and method and apparatus for making same |
| US20080117555A1 (en) * | 2006-11-17 | 2008-05-22 | AC Data Systems of Idaho, Inc. | Anti-arcing system for power surge protectors |
| CN202111324U (en) * | 2011-06-09 | 2012-01-11 | 苏州中新金属制造有限公司 | Leakage protection socket |
| CN103915833A (en) * | 2014-03-11 | 2014-07-09 | 王统 | Safe anti-thunder device |
| CN206712455U (en) * | 2017-03-14 | 2017-12-05 | 天津市天云龙电气设备有限公司 | A kind of fire-retardant fireproof Surge Protector |
| CN211655743U (en) * | 2019-12-18 | 2020-10-09 | 长沙火焰智能科技有限公司 | Combined power supply lightning protection device |
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2021
- 2021-04-13 CN CN202110391844.3A patent/CN113078626B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200953471Y (en) * | 2006-10-05 | 2007-09-26 | 王文杰 | Surge protector |
| CN111654014A (en) * | 2020-08-06 | 2020-09-11 | 南京翔维物流设备制造有限公司 | Electric power engineering surge protector |
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| CN113078626A (en) | 2021-07-06 |
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