CN201388030Y - Detonation deicer of electric transmission line - Google Patents
Detonation deicer of electric transmission line Download PDFInfo
- Publication number
- CN201388030Y CN201388030Y CN200920126699U CN200920126699U CN201388030Y CN 201388030 Y CN201388030 Y CN 201388030Y CN 200920126699 U CN200920126699 U CN 200920126699U CN 200920126699 U CN200920126699 U CN 200920126699U CN 201388030 Y CN201388030 Y CN 201388030Y
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- China
- Prior art keywords
- pinking
- deicer
- transmission line
- control section
- cylindrical shell
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a detonation deicer of electric transmission line. The deicer is an explosive device detonation device and comprises a detonation cartridge, an initiation control part and a hanging component, wherein a detonator of the initiation control part is arranged on a rotor which is installed on a supporting frame of a barrel body and is used for controlling initiation, and the detonator is limited by a mechanical timer installed on the supporting frame in the barrel body, the mechanical timber is locked by a safety device arranged on the barrel body of the initiation control part, a baffle block is arranged on the rotor and is normally located between an electric ignition head and a detonation powder column, the electric ignition head is electrically connected with a wireless remote control receiver, the wireless remote control receiver is fixedly connected with the barrel body of the initiation control part, and the hanging component is fixedly connected on the detonation device. The detonation deicer has good deicing effect, high efficiency and simple operation, and is safe and reliable.
Description
Technical field
The utility model relates to the removing ice of power transmission line field, is specifically related to a kind of pinking deicer of transmission line.
Background technology
Because boisterous influence, the transmission line snowberg accident of freezing happens occasionally, and has caused tremendous loss for human society and economy.Especially Ye Wai transmission line facility can freeze a large amount of icing on the power transmission line when being congealed weather, and in a single day the gravity of these icing surpass the bearing load of power transmission line, and power transmission line will be broken, even causes the iron tower that supports power transmission line to collapse.Suffer freezing disaster as China south at the beginning of 2008, a large amount of transmission lines are subjected to heavy damage, have just caused enormous economic loss.For preventing that power transmission line from being broken by icing, need clear up the icing on the power transmission line.At present, the icing method of removing on power transmission line and the pylon mainly contains heating power method, Mechanical Method and artificial deicing etc., is the most effective universally acknowledged deicing technology with the deicing of heating power method at present, and it utilizes the current flow heats ice coating wire, icing is melted carry out deicing, but the deicing of heating power method need consume a large amount of electric energy, its expense height, and it is big to implement difficulty, and under the weather that congeals of severe cold, the icing that melts can sharply freeze again, quickens the formation silver thaw that condenses of icing, can increase the weight of icing on the contrary; Mechanical Method adopts deicing instruments such as scraper, cylinder, cutting machine that the icing of power transmission line is little by little struck off by Artificial Control, adopt these deicing instruments little by little to strike off icing on the long-distance transmission line, and deicing efficiency is low, and the power of these instruments needs electric energy; The general energy consumption of technology of therefore above-mentioned two kinds of removal ice covering on transmission lines is big, efficient is low, poor stability.Artificial deicing is climbed up electric power line steel tower by the staff with exactlying, knocks power transmission line and insulator with the method for manually knocking, and by vibration shake icing on the power transmission line, its efficient is extremely low, and the staff's of work high above the ground safety can not get guarantee.In view of the deficiency that prior art exists, need the problem that a kind of deicing efficiency height, deicer that fail safe is good solve existence badly.
Summary of the invention
The purpose of this utility model is the deficiency that exists at prior art, a kind of pinking deicer of transmission line is provided, it adopts by pinking cartridge case, ignition control section and wireless remote controlled receiver and forms priming system pinking device, explode by near back remote control being arranged in power transmission line, can either improve deicing efficiency, can guarantee the accuracy of pinking again, and safe and reliable.
The purpose of this utility model is achieved in that this deicer is a priming system pinking device, comprise the pinking cartridge case, ignite control section, suspender, be provided with the flame proof plate between the cylindrical shell of described pinking cartridge case and ignition control section, the center of flame proof plate is provided with lead explosive, being provided with adapter-booster in the pinking cartridge case contacts with lead explosive, described ignition control section comprises detonator, electric igniter, safeties, wireless remote controlled receiver, described detonator is located at a rotor that is used to control ignition of installing on the cylindrical shell inner support of igniting control section, this rotor one end is hinged on the hinge that off-centre is provided with on the support and is with torsion spring, this rotor other end is limited in the mechanical timer of installing on the cylindrical shell inner support, mechanical timer locks with the safeties that are located on the cylindrical shell of igniting control section, electric igniter is located on the cylindrical shell inner support of igniting control section, and it is corresponding with the position of lead explosive to be positioned at the cylindrical shell center of circle, rotor is provided with a spacing block often between electric igniter and lead explosive, electric igniter is electrically connected with wireless remote controlled receiver, wireless remote controlled receiver is fixedlyed connected with the cylindrical shell of igniting control section, and described suspender is fixedly connected on the pinking device.
Owing to adopt technique scheme, priming system pinking device is made up of pinking cartridge case, ignition control section, suspender, detonator is located at a rotor that is used to control ignition of installing on the cylindrical shell inner support of igniting control section, deposit, during non operating state such as transportation, detonator and booster gains and electric igniter dislocation are isolated, has the security insurance function, only when being used for pinking work, rotation by rotor makes the detonator shift position to being communicated with priming system propagation of explosion system between lead explosive and the electric igniter, is used for igniting.And rotor is limited in the mechanical timer of installing on the cylindrical shell inner support, and behind the limitation locking of mechanical timer delay working contact to rotor, rotor could rotate detonator is delivered to the service position.Mechanical timer has delay function, just removes the restriction to rotor after the pinking device being arranged put in place, makes to the power transmission line in high-altitude and arrange that the process of pinking device carries out under safety condition.And mechanical timer is by the safeties locking that is arranged on the cylindrical shell of igniting control section, form another road security insurance, have only after the safety lock of removing mechanical timer, mechanical timer is trigger work, make the pinking device depositing, having high safety prevention measure in the transportation like this, avoid the accident of meeting accident.Electric igniter is electrically connected with wireless remote controlled receiver, wireless remote controlled receiver is fixedlyed connected with the cylindrical shell of igniting control section, the pinking device could be lighted a fire under the instruction of wireless remote control, after so just can making the pinking device be arranged on the power transmission line in high-altitude by the requirement of deicing, just ignite by remote control transmitter control, making the pinking device have the sufficient time to arrange thus puts in place, and after several pinking devices can accurately being arranged put in place, explode simultaneously or successively, generation with icing shake on the power transmission line broken drop in hit ripple, remove icing on the power transmission line.The suspender that is provided with on the pinking device can hang the pinking device on the high-level power transmission line, suspender adopts the lanyard of fastening on the pinking cartridge case, each pinking device can be fastened at the rope that is used for pinking device be elevated to pinking position parallel with power transmission line one by one by the distance of deploying to ensure effective monitoring and control of illegal activities, ignite, but also fixed hook or counterweight on the described lanyard help the pinking device is suspended on cloth controlled position on the power transmission line by the spinner throwing.After adopting the pinking device of this structure, the deicing of power transmission line can accurately be arranged to put in place, on the position of institute's cloth, ignite on time, improve the accuracy rate and the deicing efficiency of pinking deicing, and at the environment of different terrain physical features, to the pinking deicing of differing heights power transmission line, can both well deploy to ensure effective monitoring and control of illegal activities, ignite, overcome the deficiency that existing de-icing of power transmission lines technology exists; The fail safe of the deicing of pinking simultaneously also is greatly improved.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the mechanical timer structural representation;
Fig. 3 is for igniting the schematic diagram that control section is in the lock state;
Fig. 4 is for igniting the schematic diagram that control section is in the state of unlocking;
Fig. 5 makes the schematic diagram of deploying to ensure effective monitoring and control of illegal activities of deicing for this uses novel use.
In the accompanying drawing, 1 is pylon, and 2 is power transmission line, 3 are backguy, and 4 are the pinking device, and 5 is remote-controlled launcher, 6 is the flame proof plate, and 7 is connecting ring, and 8 are the pinking cartridge case, 8a is the pinking medicine, and 9 is adapter-booster, and 9a is a booster gains, 10 is seal cover, and 11 is lead explosive, and 12 is detonator, 13 is rotor, and 14 is mechanical timer, and 14a is a clockwork, 15 is electric igniter, and 16 for igniting the cylindrical shell of control section, and 16a is a support, 17 is wireless remote controlled receiver, and 18 are the clamping plate combination, and 19 are the insurance position-arresting disk, 20 is ratchet-gear wheel, and 21 is gear train, and 22 is escapement, 23 are spacing pulling pin, and 24 is spring, and 25 is push rod, 26 is Insurance Block, and 27 are the insurance flap, and 28 is torsion spring, 29 is block, and 30 is switch, and 31 is lanyard.
Embodiment
Referring to figs. 1 through Fig. 4, the pinking deicer of the transmission line of present embodiment is a priming system pinking device, comprise pinking cartridge case 9, ignite control section, suspender etc., be provided with flame proof plate 6 between the cylindrical shell 16 of described pinking cartridge case 9 and ignition control section, pinking cartridge case 8 is threaded with flame proof plate 6 by connecting ring 7, be connected and fixed with flame proof plate 6 tightly, the cylindrical shell 16 of igniting control section is fixed together by being threaded with flame proof plate 6.Lead explosive 11 is set in the hole that the center of flame proof plate 6 is provided with, be provided with adapter-booster 9 in the pinking cartridge case 8, load pinking medicine 8a in the chamber between pinking cartridge case 8 and the adapter-booster 9, load booster gains 9a in the adapter-booster 9, booster gains 9a in the adapter-booster 9 contacts with lead explosive 11, and the upper end of pinking cartridge case 8 covers sealing with seal cover 10.Described ignition control section comprises detonator 12, electric igniter 15, safeties, wireless remote controlled receiver 17, described detonator 12 is located at the cylindrical shell 16 inner support 16a that ignite control section and is gone up the rotor 13 that one of installation is used to control ignition, these rotor 13 1 ends are hinged on the hinge 16b that is located at eccentric position on the support 16a, be with torsion spring 28 on the rotor 13, torsion spring 28 is the power state that holds when non-working condition, these rotor 13 other ends are limited in cylindrical shell inner support 16a and go up the mechanical timer of installing 14, and mechanical timer 14 usefulness are located at the safeties locking on the cylindrical shell 16a that ignites control section.Described mechanical timer 14 comprises clockwork 14a, gear train 21, escapement 22, insurance position-arresting disk 19, ratchet-gear wheel 20 etc., described clockwork 14a, mesh the gear train 21 that constitutes successively by several gears, escapement 22 rotating being fixed between the clamping plate combination of forming by two clamping plates 18, a gears engaged of the gear shaft of clockwork 14a and gear train 21, another gear of gear train 21 contacts with the balancing point of escapement 22, clamping plate combination 18 is stretched out at the two ends of the gear shaft of clockwork 14a respectively outward, the circumferential fixedly connected insurance position-arresting disk 19 of one end, the circumferential fixedly connected ratchet-gear wheel 20 of the other end.The circumference of described insurance position-arresting disk 19 is provided with a breach that is used to the rotor 13 that is used to control ignition to step down, depositing when making rotor 13 flat, circumferential contact with insurance position-arresting disk 19 during transportation is in the safety lock state, restrict rotor 13 is rotated, detonator 12 is in isolation with lead explosive 11 and electric igniter 15 and can ignite, insurance position-arresting disk 19 is turned to be used to breach that the rotor 13 that is used to control ignition steps down facing to rotor 13, rotor 13 is rotated under the effect of torsion spring 28, detonator 12 is delivered between lead explosive 11 and the electric igniter 15, for ignition is prepared.Described safeties comprise the push rod 25 that is used to lock mechanical timer, spacingly pull pin 23, spring 24, the push rod 25 cover upper springs 24 that are used for locking mechanical timer are inserted in the Insurance Block 26 locking mechanical timers of being located on the cylindrical shell 16 of igniting control section 14, mechanical timer 14 can not be worked, the spacing 23 insertion Insurance Blocks 26 of pulling pin block the axial limiting locking that push rod 25 forms push rods, make spring 24 compressions hold power, push rod 25 can not retreat, and insurance flap 27 covers push rod 25 tail ends with Insurance Block 26 threaded engagement.The annular groove that described Insurance Block 26 and the cylindrical shell 16 of the igniting control section structure that is formed in one, Insurance Block 26 are provided with the spacing insertion of pulling pin of confession that is provided with for spacing pull pin 23 mouths that insert and the push rod 25 that is used to lock mechanical timer is corresponding.Describedly spacingly pulling pin 23 for the elasticity bayonet lock, can tightly be stuck in the annular groove of push rod 25 and can not come off, is the limitation locking that could remove when extracting push rod the people only.Electric igniter 15 is located on the cylindrical shell inner support 16a that ignites control section, and it is corresponding with the position of lead explosive 11 to be positioned at cylindrical shell 16 centers of circle, rotor 13 is provided with a block 29 often between electric igniter and lead explosive, electric igniter 15, lead explosive 11 are isolated, electric igniter 15 is electrically connected with wireless remote controlled receiver 17, wireless remote controlled receiver 17 is fixedlyed connected with the cylindrical shell of igniting control section, cylindrical shell inner support 16a is provided with the mains switch 30 of wireless remote controlled receiver 17, and the connection of this mains switch 30 is by 29 controls of the block on the rotor 13.Described suspender is fixedly connected on the pinking device, and suspender is the lanyard 31 of fastening on pinking cartridge case 8, is used to be fastened in the backguy parallel with power transmission line and deploys to ensure effective monitoring and control of illegal activities; Perhaps be fixed with hook or counterweight on the lanyard 31, be used for being hanging on the power transmission line and deploy to ensure effective monitoring and control of illegal activities by the flinger throwing.Because the exclusive structure of above-mentioned ignition control section makes this pinking deicer have the measure of multiple tracks security insurance, only behind these security insurance measure cancel alls, could implement to ignite, improved security insurance greatly; Simultaneously because the use of mechanical timer, make this pinking deicer have the function of time-delay arming locking, the staff is after the safety lock of ground by the cancellation push rod, the mechanical timer delay function starts, before finishing during timer travel, rotor does not rotate, the pinking deicer still is in isolates the insurance safe condition, after treating the pinking deicer risen to the deicing position in high-altitude, the timer time-delay is finished, and could remove the locking to rotor, and rotor could rotate, make the contraposition of firer's high explosive trains, finish to remove and isolate insurance function; Simultaneously, the block of rotor touches mains switch, energized, the electric-control system of pinking deicer just is in power-up state, make priming system be in work and treat the writ attitude, the ground staff is by the electric-controlled switch of wireless remote control emitter remote control command control electric-control system, and after the insurance of releasing electrical short, circuit is just exported ignition control signal and driven pinking deicer reliable ignition.The structure of this multiple insurance makes the fail safe of this pinking deicer high, can fundamentally eliminate the generation that misoperation causes security incident.
Referring to Fig. 5, when adopting this pinking deicer to remove icing on the power transmission line, several pinking deicers 4 are separately fixed at one at interval are used to the backguy 3 of deploying to ensure effective monitoring and control of illegal activities and raising, take off the insurance flap then one by one, take out spacing pulling pin, releasing is to the locking of timer, allow the work of timer trigger, by backguy these pinking deicers risings are arranged again and be fixed between two iron towers 1 of power transmission line 2, be parastate with power transmission line 2, apart from about the about 1.5m of power transmission line, after waiting to fix the position, pinking deicer 4 also is in work and treats the writ attitude, at this moment send fuze by operating personnel by wireless remote control emitter 5, control pinking deicer detonates simultaneously or detonates one by one successively, removes icing on the power transmission line 2 by the pinking shock wave, realizes the high accuracy of deicing, efficientibility and high security.Adopt this pinking deicer to remove icing on the power transmission line, can reduce the deicing cost greatly, and be applicable to the glaze of removing the transmission line sagging, mix rime, snow rime, rime, sleet etc.
Claims (8)
1. the pinking deicer of a transmission line, it is characterized in that: this deicer is a priming system pinking device, comprise the pinking cartridge case, ignite control section, suspender, be provided with the flame proof plate between the cylindrical shell of described pinking cartridge case and ignition control section, the center of flame proof plate is provided with lead explosive, being provided with adapter-booster in the pinking cartridge case contacts with lead explosive, described ignition control section comprises detonator, electric igniter, safeties, wireless remote controlled receiver, described detonator is located at a rotor that is used to control ignition of installing on the cylindrical shell inner support of igniting control section, this rotor one end is hinged on the hinge that off-centre is provided with on the support and is with torsion spring, this rotor other end is limited in the mechanical timer of installing on the cylindrical shell inner support, mechanical timer locks with the safeties that are located on the cylindrical shell of igniting control section, electric igniter is located on the cylindrical shell inner support of igniting control section, and it is corresponding with the position of lead explosive to be positioned at the cylindrical shell center of circle, rotor is provided with a block often between electric igniter and lead explosive, electric igniter is electrically connected with wireless remote controlled receiver, wireless remote controlled receiver is fixedlyed connected with the cylindrical shell of igniting control section, and described suspender is fixedly connected on the pinking device.
2. the pinking deicer of transmission line according to claim 1, it is characterized in that: described suspender is the lanyard of fastening on the pinking cartridge case.
3. the pinking deicer of transmission line according to claim 2 is characterized in that: be fixed with hook or counterweight on the described lanyard.
4. the pinking deicer of transmission line according to claim 1, it is characterized in that: described mechanical timer comprises clockwork, gear train, escapement, the insurance position-arresting disk, ratchet-gear wheel, described clockwork, gear train, escapement is fixed between the clamping plate combination of being made up of two clamping plates, a gears engaged of the gear shaft of clockwork and gear train, another gear of gear train contacts with the balancing point of escapement, the clamping plate combination is stretched out at the two ends of the gear shaft of clockwork respectively outward, the circumferential fixedly connected insurance position-arresting disk of one end, the circumferential fixedly connected ratchet-gear wheel of the other end.
5. according to the pinking deicer of claim 1 or 4 described transmission lines, it is characterized in that: the circumference of described insurance position-arresting disk is provided with the breach of stepping down for the rotor that is used to control ignition.
6. the pinking deicer of transmission line according to claim 1, it is characterized in that: described safeties comprise the push rod that is used to lock mechanical timer, spacingly pull pin, spring, the top stem casing upper spring that is used for locking mechanical timer is inserted in the Insurance Block of being located on the cylindrical shell of igniting control section and locks mechanical timer, spacing pulling pin inserted the axial limiting locking that Insurance Block blocks push rod formation push rod, and insurance flap and Insurance Block threaded engagement cover push rod.
7. the pinking deicer of transmission line according to claim 6, it is characterized in that: the annular groove that described Insurance Block and the cylindrical shell of the igniting control section structure that is formed in one, Insurance Block are provided with the spacing insertion of pulling pin of confession that is provided with for spacing the pull pin mouth that inserts and the push rod that is used to lock mechanical timer is corresponding.
8. according to the pinking deicer of claim 6 or 7 described transmission lines, it is characterized in that: described spacing pulling pin is the elasticity bayonet lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126699U CN201388030Y (en) | 2009-03-19 | 2009-03-19 | Detonation deicer of electric transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920126699U CN201388030Y (en) | 2009-03-19 | 2009-03-19 | Detonation deicer of electric transmission line |
Publications (1)
| Publication Number | Publication Date |
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| CN201388030Y true CN201388030Y (en) | 2010-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920126699U Expired - Fee Related CN201388030Y (en) | 2009-03-19 | 2009-03-19 | Detonation deicer of electric transmission line |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820154A (en) * | 2010-05-26 | 2010-09-01 | 华中电网有限公司 | Conductor supporting frame for deicing through five-split conductor mechanical vibrations |
| CN101826711A (en) * | 2010-05-26 | 2010-09-08 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of four-bundle conductor |
| CN101826712A (en) * | 2010-05-26 | 2010-09-08 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of six-bundle conductor |
| CN101826710A (en) * | 2010-05-26 | 2010-09-08 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of three-bundle conductor |
| CN101854045A (en) * | 2010-06-04 | 2010-10-06 | 浙江成达电力科技有限公司 | Controllable safety deicing cable used for transmission line |
| CN101986092A (en) * | 2010-01-27 | 2011-03-16 | 北京理工大学 | Emission detonation cartridge for removing ice on power transmission line |
| CN102184626A (en) * | 2011-04-20 | 2011-09-14 | 华中电网有限公司 | Overhead power transmission line earth wire mechanical shock deicing remote control reception device |
| CN106253137A (en) * | 2016-08-29 | 2016-12-21 | 国网山西省电力公司电力科学研究院 | A kind of overhead transmission line lead wire and earth wire explosion de-icing method of linear charge |
| CN107370107A (en) * | 2017-09-20 | 2017-11-21 | 国家电网公司 | A kind of rapid deployment formula deicer for power transmission line |
| CN111584172A (en) * | 2020-05-28 | 2020-08-25 | 叶振磊 | Improved pull wire insulator |
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2009
- 2009-03-19 CN CN200920126699U patent/CN201388030Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986092B (en) * | 2010-01-27 | 2013-04-10 | 北京理工大学 | Emission detonation cartridge for removing ice on power transmission line |
| CN101986092A (en) * | 2010-01-27 | 2011-03-16 | 北京理工大学 | Emission detonation cartridge for removing ice on power transmission line |
| CN101826710B (en) * | 2010-05-26 | 2012-06-13 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of three-bundle conductor |
| CN101826711A (en) * | 2010-05-26 | 2010-09-08 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of four-bundle conductor |
| CN101826712A (en) * | 2010-05-26 | 2010-09-08 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of six-bundle conductor |
| CN101826710A (en) * | 2010-05-26 | 2010-09-08 | 华中电网有限公司 | Conductor support frame for mechanical vibrating deicing of three-bundle conductor |
| CN101820154A (en) * | 2010-05-26 | 2010-09-01 | 华中电网有限公司 | Conductor supporting frame for deicing through five-split conductor mechanical vibrations |
| CN101854045B (en) * | 2010-06-04 | 2012-07-11 | 浙江成达电力科技有限公司 | Controllable safety deicing cable used for transmission line |
| CN101854045A (en) * | 2010-06-04 | 2010-10-06 | 浙江成达电力科技有限公司 | Controllable safety deicing cable used for transmission line |
| CN102184626A (en) * | 2011-04-20 | 2011-09-14 | 华中电网有限公司 | Overhead power transmission line earth wire mechanical shock deicing remote control reception device |
| CN106253137A (en) * | 2016-08-29 | 2016-12-21 | 国网山西省电力公司电力科学研究院 | A kind of overhead transmission line lead wire and earth wire explosion de-icing method of linear charge |
| CN106253137B (en) * | 2016-08-29 | 2017-11-07 | 国网山西省电力公司电力科学研究院 | A kind of overhead transmission line ground wire explosion de-icing method of linear charge |
| CN107370107A (en) * | 2017-09-20 | 2017-11-21 | 国家电网公司 | A kind of rapid deployment formula deicer for power transmission line |
| CN107370107B (en) * | 2017-09-20 | 2018-12-25 | 国网河北省电力有限公司石家庄市鹿泉区供电分公司 | A kind of rapid deployment formula deicer for power transmission line |
| CN111584172A (en) * | 2020-05-28 | 2020-08-25 | 叶振磊 | Improved pull wire insulator |
| CN111584172B (en) * | 2020-05-28 | 2020-12-04 | 山东广域科技有限责任公司 | Improved pull wire insulator |
| CN111584172B8 (en) * | 2020-05-28 | 2021-01-19 | 山东广域科技有限责任公司 | Improved pull wire insulator |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20120319 |