CN108557594B - Lightning current diverter with self-locking device and installation method - Google Patents
Lightning current diverter with self-locking device and installation method Download PDFInfo
- Publication number
- CN108557594B CN108557594B CN201810327241.5A CN201810327241A CN108557594B CN 108557594 B CN108557594 B CN 108557594B CN 201810327241 A CN201810327241 A CN 201810327241A CN 108557594 B CN108557594 B CN 108557594B
- Authority
- CN
- China
- Prior art keywords
- lightning current
- copper braid
- current diverter
- self
- locking device
- 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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Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000009434 installation Methods 0.000 title description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052802 copper Inorganic materials 0.000 claims abstract description 69
- 239000010949 copper Substances 0.000 claims abstract description 69
- 239000010779 crude oil Substances 0.000 claims description 15
- 239000004677 Nylon Substances 0.000 claims description 12
- 229920001778 nylon Polymers 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 3
- 208000025274 Lightning injury Diseases 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 8
- 239000002131 composite material Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/4436—Arrangements for yieldably braking the reel or the material for moderating speed of winding or unwinding
- B65H75/4439—Arrangements for yieldably braking the reel or the material for moderating speed of winding or unwinding acting directly on the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/22—Safety features
- B65D90/46—Arrangements for carrying off, or preventing the formation of electrostatic charges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
- B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
- B65H75/44—Constructional details
- B65H75/48—Automatic re-storing devices
- B65H75/486—Arrangements or adaptations of the spring motor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
Abstract
The invention discloses a lightning current diverter with a self-locking device, which comprises a lightning current diverter mechanism, wherein a plane spiral spring and a copper braid belt are arranged in the lightning current diverter mechanism, one end of the plane spiral spring is fixed on a shell of the lightning current diverter structure, and the other end of the plane spiral spring is fixed on a main shaft connected with a reel; one end of the copper braid belt is fixed on a reel in the lightning current diverter structure, and the other end of the copper braid belt penetrates through a self-locking device fixed on the lightning current diverter structure, and the self-locking device can apply a reaction force to the copper braid belt to be stretched in a swinging state, so that the stretching speed of the copper braid belt is reduced, and the plane spiral spring is in a stable state. The invention has simple structure and novel design, and prolongs the service life of the plane scroll spring.
Description
Technical Field
The invention belongs to lightning current shunts, and particularly relates to a lightning current shunt with a self-locking device.
Background
The large crude oil storage tanks are typically floating roof tanks, the floating pans of which float above the crude oil when in use. Currently, in order to prevent crude oil vapors from leaking from the edges of the float, it is common to seal it with a non-conductive material, typically nitrile rubber, that electrically insulates the float from the tank wall, making the float an isolated conductor. Because crude oil resistivity is higher, crude oil can generate a large amount of static charges when thunder and lightning occur and crude oil is rapidly canned, the charges are gradually transferred to a attractive conductor with opposite charges, the static charges of crude oil can be collected by the floating disc under the influence of low electric potential of the tank wall, the induction voltage of the static charges can reach hundreds of kilovolts, the air breakdown voltage is about 500kV/m, the gap between a standard floating disc and the tank wall is about 250mm, the gap between the floating disc and the tank wall can be reduced due to aging of sealing materials and process deviation, the static charge induction voltage between the floating disc and the tank wall is about 100kV, flammable flashover discharge can be formed, and once the aging oil vapor of the sealing materials overflows, fire accidents can be caused. National standard Petroleum warehouse design Specification (GB 50074-2002) and Petroleum facility lightning safety Specification (GB 15)599-95) has definite regulation on lightning protection and static electricity prevention grounding of the floating disc: the floating roof oil tank or the inner floating roof oil tank is not provided with a lightning rod, but the floating roof and the tank body are electrically connected by 2 wires. The cross section of the connecting wire of the floating roof oil tank should be not less than 25mm 2 Is a soft copper composite stranded wire. For an inner floating roof oil tank, the steel floating disc oil tank connecting wire is selected to have a cross section not smaller than 16mm 2 Is a soft copper composite stranded wire; the connecting wire of the aluminum floating disc oil tank is a stainless steel wire rope with the diameter not smaller than 1.8 mm. Two 25mm strips are commonly adopted in the lightning protection and antistatic grounding mode of the traditional crude oil storage tank floating plate 2 The soft copper composite stranded wire is connected with the floating disc by the top end of the wall of the storage tank according to the length larger than the height of the tank, when the floating disc rises along with the liquid level, the soft copper composite stranded wire is scattered on the floating disc, and the soft copper composite stranded wire is easy to corrode due to sulfur-containing oil gas of crude oil and wind and rain, so potential safety hazard exists.
The existing lightning current diverter of the floating roof tank at home and abroad is fixed on one end of the shell and the rotating shaft by adopting a plane scroll spring, a copper braid belt is fixedly wound on the other end of the rotating shaft, and the extension and retraction of the copper braid belt are controlled by the elasticity of the plane scroll spring. In actual use, the copper braid is blown in the windy weather, and frequent extension and retraction are caused. Frequent telescoping vibrations can cause spring fatigue and even breakage of the flat spiral spring within the device. Once the elastic force of the plane scroll spring becomes small and even breaks, the braid cannot be retracted into the device and scattered on the floating disc.
Disclosure of Invention
According to the defects of the prior art, the invention provides a lightning current diverter with a self-locking device and an installation method thereof, which are used for prolonging the service life of a plane scroll spring.
The invention is realized according to the following technical scheme:
the lightning current diverter with the self-locking device comprises a lightning current diverter mechanism, wherein a plane spiral spring and a copper braid belt are arranged in the lightning current diverter mechanism, one end of the plane spiral spring is fixed on a shell of the lightning current diverter structure, and the other end of the plane spiral spring is fixed on a main shaft connected with a reel; one end of the copper braid belt is fixed on a reel in the lightning current diverter structure, and the other end of the copper braid belt penetrates through a self-locking device fixed on the lightning current diverter structure, and the self-locking device can apply a reaction force to the copper braid belt to be stretched in a swinging state, so that the stretching speed of the copper braid belt is reduced, and the plane spiral spring is in a stable state.
Preferably, the self-locking device comprises a fixed sleeve, a guide frame, an upper nylon sleeve, a swinging frame and a lower nylon sleeve; the fixed sleeve is connected to the wire harness frame of the lightning current diverter structure, the guide frame is hinged to the fixed sleeve, the upper nylon sleeve is fixedly arranged at the upper opening of the guide frame, the swing frame is arranged at the lower part of the guide frame and is hinged to the guide frame, and the lower nylon sleeve is fixedly arranged at the bottom of the swing frame.
Preferably, the self-locking device further comprises an adjusting device for enabling the fixing frame to be at a certain use angle and ensuring that the copper braid can stretch normally in the use process.
Preferably, the adjusting device comprises an adjusting link, a collar and a nut; one end of the adjusting connecting rod is hinged with the guide frame, and the other end of the adjusting connecting rod passes through the lantern ring on the beam frame of the lightning current diverter structure and then is abutted against the beam frame of the lightning current diverter structure through the fastening of the nut, so that the guide frame is fixed.
Preferably, the swing frame is movably connected with the guide frame through bolts.
Preferably, the free ends of the copper braid are wrapped by copper lugs.
The installation method of the lightning current diverter with the self-locking device comprises the following steps: the lightning current diverter structure is fixed on the filling wall of the crude oil floating roof tank by a stainless steel bolt, one end of a copper wire lug of the copper braid belt is fixed on a foam baffle plate of the crude oil floating roof tank floating disc by the stainless steel bolt, and an electric path is formed between the floating roof tank and the tank wall by the copper braid belt and the lightning current diverter structure so as to conduct current generated by lightning stroke; the adjusting connecting rod is adjusted, so that the guide frame is positioned at a certain use angle, the copper braid belt can be ensured to stretch normally in the use process, when the copper braid belt stretches under the action of external force, the guide frame is fixed, the swinging frame swings along with the copper braid belt, the copper braid belt is tightly pressed in the opposite direction at the top of the swinging frame at the moment, a reaction force is given to the copper braid belt, the stretching speed of the copper braid belt is reduced, and even the copper braid belt is locked, so that the plane scroll spring is in a stable state.
The invention has the beneficial effects that:
the invention adds a self-locking device on the basis of the original lightning current diverter structure, and the device is utilized to compress the copper braid belt along with the swinging direction to give a reaction force to the copper braid belt, so as to reduce the expansion speed of the copper braid belt and even lock the copper braid belt, avoid the harmful vibration to the plane scroll spring caused by frequent expansion and contraction, and prolong the service life of the plane scroll spring.
Drawings
FIG. 1 is a front view of a lightning current diverter with a self-locking device according to the present invention;
FIG. 2 is a side view of the lightning current diverter with self-locking device of FIG. 1;
FIG. 3 is a schematic diagram of a self-locking device according to the present invention.
Detailed Description
The invention is further illustrated by the following examples, in conjunction with the accompanying drawings.
As shown in fig. 1, 2 and 3, the lightning current diverter with the self-locking device comprises a lightning current diverter mechanism 1, wherein a plane scroll spring 11 and a copper braid 8 are arranged in the lightning current diverter mechanism 1, one end of the plane scroll spring 11 is fixed on a shell of the lightning current diverter mechanism 1, and the other end is fixed on a main shaft connected with a reel; one end of the copper braid 8 is fixed on a reel in the lightning current diverter structure 1, and the other end passes through a self-locking device fixed on the lightning current diverter structure 1, and the self-locking device can apply a reaction force to the copper braid 8 to be stretched in a swinging state, so that the stretching speed of the copper braid 8 is reduced, and the plane spiral spring 11 is in a stable state.
The preferable scheme is as follows: the self-locking device comprises a fixed sleeve 2, a guide frame 3, an upper nylon sleeve 4, a swinging frame 5 and a lower nylon sleeve 6; the fixed sleeve 2 is connected to the wire harness frame of the lightning current diverter structure 1, the guide frame 3 is hinged to the fixed sleeve 2, the upper nylon sleeve 4 is fixedly arranged at the upper opening of the guide frame 3, the swing frame 5 is arranged at the lower part of the guide frame 3 and hinged to the guide frame 3, and the lower nylon sleeve 6 is fixedly arranged at the bottom of the swing frame 5.
The further scheme is as follows: the self-locking device also comprises an adjusting device which is used for enabling the fixing frame 3 to be at a certain use angle and ensuring that the copper braid 8 can stretch normally in the use process.
The preferable scheme is as follows: the adjusting device comprises an adjusting connecting rod 7, a lantern ring 12 and a nut 13; one end of the adjusting connecting rod 7 is hinged with the guide frame 3, and after the other end of the adjusting connecting rod 7 passes through a lantern ring 12 positioned on the beam frame of the lightning current diverter structure 1, the adjusting connecting rod is abutted on the beam frame of the lightning current diverter structure 1 through the fastening of a nut 13, so that the guide frame 3 is fixed.
The preferable scheme is as follows: the swing frame 5 is movably connected with the guide frame 3 through the cooperation of a screw rod, a left fixing bolt 9 and a right fixing bolt 10, and the adjusting connecting rod 7 is connected to the screw rod on the right side.
When the lightning current diverter structure 1 is installed and used, the stainless steel bolts are fixed on the wall of the crude oil floating roof tank, one end of the copper wiring nose of the copper braid belt 8 is fixed on the foam baffle plate of the crude oil floating roof tank floating disc by the stainless steel bolts, and thus an electric path is formed between the floating roof tank and the tank wall through the copper braid belt 8 and the lightning current diverter structure 1 so as to conduct current generated by lightning strike.
According to the invention, on the basis of the original lightning current diverter structure, a self-locking device is added, when the lightning current diverter is installed, the adjusting connecting rod 7 is adjusted to enable the guide frame 3 to be in a certain use angle, so that the copper braid belt 8 can stretch normally in the use process, when the copper braid belt 8 stretches under the action of external force, the guide frame 3 is fixed, the swinging frame 5 swings along with the copper braid belt 8, at the moment, the pressing plate at the top of the swinging frame 5 presses the copper braid belt 8 in the opposite direction, a reaction force is given to the copper braid belt 8, the stretching speed of the copper braid belt is reduced, even the copper braid belt is locked, the flat scroll spring 11 is effectively enabled to be in a stable state, frequent vibration on the flat scroll spring 11 due to the fact that the copper braid belt 8 stretches back and forth under the action of external force such as strong wind is avoided, and the service life of the flat scroll spring 11 is prolonged.
The self-locking device in the invention can compress the copper braid 8 along with the swinging direction to give a reaction force when the copper braid 8 swings under the influence of wind or some external force, reduces the expansion speed and even locks the copper braid 8, does not cause the copper braid 8 to drive the plane scroll spring to vibrate frequently due to the interference of external force such as strong wind and the like, and can prolong the service life of the plane scroll spring 11.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (3)
1. The utility model provides a take self-locking device's lightning current shunt which characterized in that: comprises a lightning current diverter mechanism (1), wherein a plane spiral spring (11) and a copper braid belt (8) are arranged in the lightning current diverter mechanism (1),
one end of the plane scroll spring (11) is fixed on the shell of the lightning current diverter structure (1), and the other end is fixed on a main shaft connected with the reel;
one end of the copper braid belt (8) is fixed on a reel in the lightning current diverter mechanism (1), and the other end of the copper braid belt passes through a self-locking device fixed on the lightning current diverter mechanism (1), and the self-locking device can apply a reaction force to the copper braid belt (8) to be stretched in a swinging state, so that the stretching speed of the copper braid belt is reduced, and the plane scroll spring (11) is in a stable state;
the self-locking device comprises a fixed sleeve (2), a guide frame (3), an upper nylon sleeve (4), a swinging frame (5) and a lower nylon sleeve (6);
the fixing sleeve (2) is connected to a beam frame of the lightning current diverter structure (1), the guide frame (3) is hinged with the fixing sleeve (2), the upper nylon sleeve (4) is fixedly arranged at the upper opening position of the guide frame (3), the swing frame (5) is positioned at the lower part of the guide frame (3) and hinged with the guide frame (3), and the lower nylon sleeve (6) is fixedly arranged at the bottom of the swing frame (5);
the self-locking device also comprises an adjusting device which is used for enabling the guide frame (3) to be at a certain use angle and ensuring that the copper braid (8) can stretch normally in the use process;
the adjusting device comprises an adjusting connecting rod (7), a lantern ring (12) and a nut (13);
one end of the adjusting connecting rod (7) is hinged with the guide frame (3), and after passing through a lantern ring (12) positioned on a beam frame of the lightning current diverter structure (1), the other end of the adjusting connecting rod (7) is abutted against the beam frame of the lightning current diverter structure (1) through the fastening of a nut (13), so that the guide frame (3) is fixed;
the swing frame (5) is movably connected with the guide frame (3) through bolts.
2. The lightning current diverter with self-locking device according to claim 1, wherein: the free end of the copper braid (8) is wrapped by a copper connecting nose.
3. A method for installing a lightning current diverter with a self-locking device according to claim 1 or 2, characterized in that:
the lightning current diverter structure (1) is fixed on the wall of the crude oil floating roof tank by a stainless steel bolt, one end of a copper wiring nose of the copper braid belt (8) is fixed on a foam baffle plate of the crude oil floating roof tank floating disc by a stainless steel bolt, and thus an electric path is formed between the floating roof tank and the tank wall through the copper braid belt (8) and the lightning current diverter structure (1) so as to conduct current generated by lightning stroke;
adjusting the connecting rod (7), making leading truck (3) be in certain angle of use, ensuring that copper braid (8) can normally stretch out and draw back in the use, when copper braid (8) is stretching out and draw back under the exogenic action, leading truck (3) is motionless, swing frame (5) follow copper braid (8) swing, swing frame (5) top position opposite direction compresses tightly copper braid (8) this moment, gives it a reaction force, reduces its expansion speed and even locks it, and effectual messenger plane scroll spring (11) are in steady state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327241.5A CN108557594B (en) | 2018-04-12 | 2018-04-12 | Lightning current diverter with self-locking device and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327241.5A CN108557594B (en) | 2018-04-12 | 2018-04-12 | Lightning current diverter with self-locking device and installation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108557594A CN108557594A (en) | 2018-09-21 |
| CN108557594B true CN108557594B (en) | 2024-03-08 |
Family
ID=63534884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810327241.5A Active CN108557594B (en) | 2018-04-12 | 2018-04-12 | Lightning current diverter with self-locking device and installation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108557594B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4084764A (en) * | 1976-04-28 | 1978-04-18 | Fa. J. N. Eberle & Cie. Gmbh | Device for winding up a belt or web |
| US4730783A (en) * | 1983-09-30 | 1988-03-15 | Spencer Products Company | Tape measure |
| CN2501213Y (en) * | 2001-08-29 | 2002-07-17 | 杨存璋 | Coiling box for telephone connecting line |
| JP2003225874A (en) * | 2002-02-05 | 2003-08-12 | Yoshikata Rokusha | Automatically rolling-in pushing device |
| JP2010240325A (en) * | 2009-04-10 | 2010-10-28 | Fujii Denko Co Ltd | Conductive type take-up utensil and conductive type safety belt equipped with the same |
| CN204167622U (en) * | 2014-08-29 | 2015-02-18 | 江苏德大自动化设备有限公司 | A kind of lightning protection, the dual-purpose earthing device of antistatic |
| CN208413525U (en) * | 2018-04-12 | 2019-01-22 | 江苏驭雷安全科技有限公司 | Lightning current current divider with self-locking device |
-
2018
- 2018-04-12 CN CN201810327241.5A patent/CN108557594B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4084764A (en) * | 1976-04-28 | 1978-04-18 | Fa. J. N. Eberle & Cie. Gmbh | Device for winding up a belt or web |
| US4730783A (en) * | 1983-09-30 | 1988-03-15 | Spencer Products Company | Tape measure |
| CN2501213Y (en) * | 2001-08-29 | 2002-07-17 | 杨存璋 | Coiling box for telephone connecting line |
| JP2003225874A (en) * | 2002-02-05 | 2003-08-12 | Yoshikata Rokusha | Automatically rolling-in pushing device |
| JP2010240325A (en) * | 2009-04-10 | 2010-10-28 | Fujii Denko Co Ltd | Conductive type take-up utensil and conductive type safety belt equipped with the same |
| CN204167622U (en) * | 2014-08-29 | 2015-02-18 | 江苏德大自动化设备有限公司 | A kind of lightning protection, the dual-purpose earthing device of antistatic |
| CN208413525U (en) * | 2018-04-12 | 2019-01-22 | 江苏驭雷安全科技有限公司 | Lightning current current divider with self-locking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108557594A (en) | 2018-09-21 |
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