CN205489005U - A connect and dodge utmost point post for lightning rod - Google Patents
A connect and dodge utmost point post for lightning rod Download PDFInfo
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- CN205489005U CN205489005U CN201521041997.1U CN201521041997U CN205489005U CN 205489005 U CN205489005 U CN 205489005U CN 201521041997 U CN201521041997 U CN 201521041997U CN 205489005 U CN205489005 U CN 205489005U
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- hafnium
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- pole
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Abstract
The utility model provides a connect and dodge utmost point post for lightning rod belongs to lightning protection engineering technical field. Connect the axle center of dodging utmost point post to adopt hafnium or hafnium alloy to make, hafnium or hafnium alloy are made the periphery in axle center adopts other metal material parcels, and hafnium or hafnium alloy are made the top in axle center does connect the sudden strain of a muscle contact. Adopt connect and dodge utmost point post and/or connect the lightning rod that dodges utmost point post including this, can bring up to the hot carrying capacity of lightning rod transient state more than 4100 degrees effectively, the resistivity with the lightning rod keeps at (20 degrees centigrade) simultaneously: 2.6548 10 8 omega m~5.196 10 8 level between the omega m melts with impaired what suppressing lightning can prevent effectively that high temperature from leading to in super high altitude environment.
Description
Technical field
This utility model belongs to lightening protection engineering technical field, and be specifically related to a kind of discharging rod connects sudden strain of a muscle pole.
Background technology
Discharging rod, has another name called lightning rod, connects sudden strain of a muscle bar, spark gap, arrester, be used to protect buildings or structures, tall and big trees
Etc. the device avoiding thunderbolt.When thundercloud discharge is close to ground, ground electric field can be made to be distorted.In the top of discharging rod, shape
Become the space that internal field concentrates, to affect the developing direction of lightning leader electric discharge, guide thunder and lightning to discharge to discharging rod, then pass through
Lightning current is introduced the earth, so that protected object body exempts from thunderbolt by down conductor and grounding device.
In prior art, based on the lightning protection effect that discharging rod is basic, prevent from lightning protection scope, discharge effect, receptor surface
Protect, whether be easily installed transport, service life, cost of manufacture, draw the aspects such as thunder effect and have developed and various there is different changing
Enter the discharging rod of function, specific as follows:
Patent of invention ZL201310193855.6 provides a kind of based on taking shelter from the thunder that change space electric field distribution thus corona free occur
Pin, including column, be located at column top draw thunder and lightning pole, the horizontal grading ring supported with level and skewed horizontal load bar on column,
Discharge cavity below column and fixed underpan, draw thunder and lightning pole and connect discharge cavity through column, draws thunder and lightning pole and is divided into the main thunder and lightning pole and auxiliary of drawing
Drawing thunder and lightning pole, auxiliary thunder and lightning pole of drawing is located at and main draws around thunder and lightning pole, and support bar is semiconductor support bar, main draw thunder pole and auxiliary draws thunder
Pole is fixed on a spherical equal field ball, and equal field ball is fixed on column top；Grading ring is fixed on and draws thunder surrounding them and less than thunder
Eletrode tip 5cm.This discharging rod is greatly increased and draws thunder effect, lightning-arrest reliable and easy to manufacture, installation convenience.
Application for a patent for invention 201310202211.9 provides a kind of discharging rod, and it has needle body, angle steel and adjustment bolt, described
Angle steel be bolted on electric power pylon tower head and ground connection, angle steel is provided with adjustment slideway, adjusts bolt and is locked by adjustment
Jack panel is arranged on adjustment slideway, and the tail end of needle body is fixed with bolt after adjusting bolt.Described discharging rod is by adjusting spiral shell
Bolt, to adjust shielding angle, expands the protection domain of lightning conducter, solves shielding thunder and steel tower and insulator thereof and wire are constituted prestige
The problem of the side of body, is effectively protected steel tower and insulator thereof and wire.
Utility model patent ZL201320129470.9 discloses a kind of movable up-down and connects sudden strain of a muscle bar, including connecing sudden strain of a muscle bar main body and ground connection
Device, support base, described in connect sudden strain of a muscle bar main body be divided into several sections, every segment length is 2 meters to 5 meters, all uses removable between every two sections
Separation structure connects, described grounding device with connect detachable be connected between sudden strain of a muscle bar main body, described support base and connecing between sudden strain of a muscle bar main body
Detachable connection.This discharging rod assembly and disassembly is convenient, it is simple to transport, and connect sudden strain of a muscle bar height can flexible according to actual needs.
Application for a patent for invention 201410153881.0 provides a kind of arrester, including top be tip connect sudden strain of a muscle bar and for
The mounting seat being connected with building roof, the described sudden strain of a muscle bar that connects is vertically connected in mounting seat；It is characterized in that: it also wraps
Including pre-arcing device and lightning protection device, described pre-arcing device and lightning protection device are arranged at connecing the middle part dodging bar,
And lightning protection device is positioned at the lower section of pre-arcing device；The described sudden strain of a muscle bar surface that connects is coated with one layer of zinc coat by galvanizing by dipping,
Containing rare earth in galvanizing solution time zinc-plated, the content of its middle rare earth is the 0.1%～0.2% of galvanizing solution.This arrester has
Have and can assemble a large amount of electron ion, the features such as antioxidation corrosion resistance is good.
Application for a patent for invention 201510436433.6 discloses a kind of discharging rod including flange, and described flange becomes with a stay tube one
Type, the obverse and reverse of flange is respectively equipped with reinforcement, and the bottom of flange is connected, in the middle part of a stay tube by bolt and tower body are fixing
Being fixed with copper strips fixture, copper strips is fixed on described copper strips fixture by locking steel ring, and lightning-arrest needle point is fixed on support by hoop tool
The top of pipe.It is simple that this discharging rod has processing technique, is not likely to produce deformation, it is easy to coordinates and installs, and component is simple, on-the-spot peace
The features such as dress is convenient.
But, this area remains in following blank: more than more than 200 meters in superaltitude environment, high produced by strong convection thunder and lightning
Temperature usually can reach about 3000 degree, and ordinary lightning rod typically uses ferrum, copper and stainless steel material, and these metal materials
The highest bearing temperature is less than 1600, the most usually occur ordinary lightning rod by the heat effect of lightning current and mechanical effect to breaking and
The locally accident of instant melting, thunder and lightning connects the produced powerful charge inducing of sudden strain of a muscle discharging rod can be caused to become thunder carrying-off device simultaneously.Cause
This need badly develop a kind of that can be used in superaltitude environment, there is the lightning rod of good heat-resisting ability, and this area is still
Have not seen this type of relevant report.
Utility model content
This utility model blank based on above-mentioned field, it is provided that a kind of can be used in superaltitude environment, in strong convection thunder and lightning institute
Can guarantee that good lightning protection effect under the hot environment produced connects sudden strain of a muscle pole, for discharging rod.
The technical solution of the utility model is as follows:
A kind of discharging rod, it is characterised in that include that one or more connect sudden strain of a muscle pole, connect described at least one sudden strain of a muscle pole use hafnium or
Hafnium alloy is raw material.Connect sudden strain of a muscle pole with hafnium or hafnium alloy for what raw material made this utility model discharging rod, can effectively by
Discharging rod thermal transient ability to bear brings up to more than 4100 degree.
Described discharging rod also includes connecing sudden strain of a muscle bar；The described sudden strain of a muscle bar one end that connects is for being connected with building, and the other end is free end, uses
Connect flash element in installation, described in connect dodge pole one end be connected to described in connect dodge bar free end, the other end is for connecing sudden strain of a muscle contact.Connect
The top of sudden strain of a muscle bar free end can also include the main sudden strain of a muscle pin that connects, and master connects sudden strain of a muscle pin and the described effect connecing sudden strain of a muscle contact connecing sudden strain of a muscle pole is all to use
In connecing sudden strain of a muscle thunder and lightning.Connect dodge bar effect except connect lead thunder and lightning can also as described connect dodge pole supporting member.
The described sudden strain of a muscle pole that connects uses hafnium or hafnium alloy to be that raw material refers to, axle center uses hafnium or hafnium alloy to make, and hafnium or hafnium alloy are made
The periphery in described axle center use other metal material to wrap up, the top in the described axle center that hafnium or hafnium alloy are made be described in connect sudden strain of a muscle
Contact.To be formed centrally a comparison powerful complete in order to countershaft for other metal material parcel hafnium or the pole axle center made of hafnium alloy
Peripheral protection, it is to avoid hafnium alloy axle center, because of damage, extends the service life of hafnium pole, thus reaches safer more permanent
Application target, the most so parcel is also more beneficial for hafnium alloy uniformly bearing and transmitting for high temperature.
It is peripheral and connect described in close on and dodge the position of contact and form flange knot that other metal material described is wrapped in described hafnium or hafnium alloy
The electric discharge circle of structure.The electric discharge circle of said structure is set, has the beneficial effects that, owing to the connecing outer area of electric discharge circle dodges pole
10 times, air-flow hinders projection effect to be 30 times connecing and dodging pole, therefore can preferably increase electric charge and discharging rod ball in air
Contact level, and allow high aerial electric charge be more prone to be gathered in and connect sudden strain of a muscle pole, obtain the more charging neutrality time, thus strengthen
Discharging rod aerial charging neutrality ability and scope.After tested, comprise this electric discharge coil structures discharging rod effectively neutralize positive and negative from
Charge of the electron scope (diameter) is up to 6000mm～8000mm.
Specifically, other metal material described is gold, silver, copper, aluminum.Further, other metal material described is preferably purple
Copper, benefit is, considers the aspects such as performance, cost and application timeliness, uses red copper cost performance optimum.
Further, described discharging rod also includes gold, silver, copper, copper-clad gold, copper-clad silver, copper is silver-plated, aluminum, steel alloy or conjunction
Gold steel 2# is raw-material to connect sudden strain of a muscle pole.Discharging rod of the present utility model is except including that the hafnium with superhigh temperature resistant ability connects sudden strain of a muscle pole
Outward, it is also possible to include that what this area discharging rod common metal made connects sudden strain of a muscle pole, make the discharging rod of the present utility model can be high temperature resistant
Prevent the impaired lightning protection effect having again ordinary lightning rod concurrently.
A kind of connect sudden strain of a muscle pole for discharging rod, it is characterised in that described in connect sudden strain of a muscle pole and use hafnium or hafnium alloy to be raw material.Bag
Containing this discharging rod dodging pole with hafnium or hafnium alloy for connecing of making of raw material, can taking shelter from the thunder at superaltitude environment effectively
Thermal transient ability to bear is brought up to more than 4100 degree by journey.
Bar is dodged for connecing of discharging rod in the described one end dodging pole that connects, and the other end is for connecing sudden strain of a muscle contact.Connect sudden strain of a muscle pole to connect with routine
Dodge bar to be connected so that routine connects sudden strain of a muscle bar/discharging rod and obtains resistant to elevated temperatures ability equally.
The described sudden strain of a muscle pole that connects uses hafnium or hafnium alloy to be that the raw material spindle heart uses hafnium or hafnium alloy to make, and hafnium or hafnium alloy are made
The periphery in described axle center uses other metal material to wrap up, the top in the described axle center that hafnium or hafnium alloy are made be described in connect sudden strain of a muscle touch
Head；Other metal material parcel hafnium or the pole axle center made of hafnium alloy in order to countershaft be formed centrally comparison powerful complete outside
Enclose protection, it is to avoid hafnium alloy axle center, because of damage, extends the service life of hafnium pole, thus reaches safer more permanent making
By purpose, the most so parcel is also more beneficial for hafnium alloy uniformly bearing and transmitting for high temperature.
It is peripheral and connect described in close on and dodge the position of contact and form flange knot that other metal material described is wrapped in described hafnium or hafnium alloy
The electric discharge circle of structure.Forming the electric discharge circle of this flanged structure, benefit is, due to electric discharge circle is 10 connecing and dodging pole to outer area
Times, air-flow hinders projection effect to be 30 times connecing and dodging pole, therefore can preferably increase electric charge in air and connect with discharging rod spheroid
Contacting surface, and allow high aerial electric charge be more prone to be gathered in and connect sudden strain of a muscle pole, obtain the more charging neutrality time, thus strengthen lightning-arrest
Pin aerial charging neutrality ability and scope, make effectively to neutralize negative ions ranges of charge (diameter) and reach 6000mm-8000mm.
Other metal material described is gold, silver, copper, aluminum.Further, other metal material described is preferably red copper, benefit
It is to consider the aspects such as performance, cost and application timeliness, use red copper cost performance optimum.
This utility model connects sudden strain of a muscle pole in lightning protection and/or the application of lightning-arrest aspect described in being claimed.
This utility model is also claimed described connecing and dodges pole and/or described discharging rod lightning protection and/lightning-arrest aspect in hyperenvironment
Application.
This utility model provides a kind of hafnium being made up of hafnium or hafnium alloy and connects sudden strain of a muscle pole, can be used for lightning protection/lightning-arrest.Based on described hafnium
Connecing sudden strain of a muscle pole, this utility model additionally provides a kind of discharging rod in superaltitude environment, described in comprise hafnium and connect and dodge the keeping away of pole
The key property of thunder pin is as follows: from common 1600, the heat-resisting ability of common metal discharging rod is brought up to 4100 degree centigrade.
Hafnium arrester described in the utility model and/or discharging rod use hafnium alloy material as connecing sudden strain of a muscle pole contact head, assist with red copper bag, from
And effectively discharging rod thermal transient ability to bear is brought up to more than 4100 degree.The conduction of discharging rod is connect sudden strain of a muscle ability to be maintained at simultaneously
(20 degrees Celsius): 2.6548 × 10-8Ω/m～5.196 × 10-8Ω/m。
Alloy hafnium is applied to connect among lightning pole by this utility model, when in thunder and lightning heavy current produce superhigh temperature electric charge with heat, electricity,
The huge energy of three kinds of different effect comprehensive methods of magnetic is introduced directly into the earth by down conductor system again and consumes.Because of alloy hafnium
Adding causes the flash heating fusing point that connects of superaltitude discharging rod to realize 4100 degrees Celsius.Drastically increase discharging rod and connect sudden strain of a muscle high temperature thundercloud electricity
The ability of lotus.It is very suitable for superaltitude building to arrester demand technically.
Hafnium alloy is innovatively applied to lightning protection field by this utility model, and obtains one and can resist strong convection in superaltitude environment
High temperature that thundercloud electricity produces thus avoid lightning protection device impaired connect sudden strain of a muscle pole and/or discharging rod.Although those skilled in the art are ripe
Know, hafnium alloy: five carbonization four tantalum hafnium (Ta4HfC5) fusing point is 4215 degrees Celsius, is that fusing point is the highest in known substance in the world
, but there is not any document addresses in prior art, that hafnium alloy can be applied to connect sudden strain of a muscle pole, discharging rod etc. is anti-
In thunder device, so those skilled in the art are before seeing this utility model, will not actively expect hafnium alloy for as anti-
Pole is dodged in connecing of thunder/lightning arrester.
Described in the utility model connect sudden strain of a muscle pole and/or discharging rod can effectively solve the most right of superelevation buildings or structures high-altitude thundercloud
Stream thundercloud electricity, the direct stroke calcination of hot mixing launch a surprise attack the danger of discharging rod fusing, have filled up the above-mentioned blank of this area, have been super
In high altitude environment, such as the lightning protection on superelevation buildings or structures and/or lightning-arrest provide a kind of effective and safe, be difficult to fusing, resistance to height
Warm, effective lightning protection/lightning arrester.
Accompanying drawing explanation
Fig. 1 is discharging rod described in the utility model and connects the overall structure figure dodging pole.
Fig. 2 is discharging rod described in the utility model and connects the plan structure figure dodging pole.
Labelling in figure lists as follows: 1-connects sudden strain of a muscle pole；11-connects sudden strain of a muscle contact；12-discharges circle；2-connects sudden strain of a muscle bar；21-master connects sudden strain of a muscle pin.
Detailed description of the invention
The utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings, but does not limit this with this
The scope of utility model.If no special instructions, in following embodiment use operation be conventional method, the parts used and
Consumptive material all can be commercially available.
As it is shown in figure 1, in all the present embodiment of the present utility model, it is provided that discharging rod there is following common feature: include
One or more connect sudden strain of a muscle pole 1, connect sudden strain of a muscle pole 1 described at least one and use hafnium or hafnium alloy to be raw material.Performance test shows,
Discharging rod of the present utility model brings up to more than 4100 degree in terms of thermal transient ability to bear.
On this basis, this utility model has also done further optimization, further increases discharging rod in terms of variant
Performance.Specific as follows:
In a further embodiment, described discharging rod also includes connecing sudden strain of a muscle bar 2；Described connect sudden strain of a muscle bar 2 one end for build (structure)
Building thing to be connected, the other end is free end, connects flash element for installation, described in connect dodge pole 1 one end be connected to described in connect sudden strain of a muscle
The free end of bar 2, the other end is for connecing sudden strain of a muscle contact 11.
The main sudden strain of a muscle pin 21 that connects can also be included in some embodiments connecing the top dodging bar 2 free end, main connect sudden strain of a muscle pin 21 and described connect
The effect connecing sudden strain of a muscle contact 11 dodging pole 1 contributes to connect sudden strain of a muscle thunder and lightning.Connect the effect dodging bar 2 except connect lead thunder and lightning can also be as
The described supporting member connecing sudden strain of a muscle pole 1.
In a further embodiment, it is preferable that described in connect sudden strain of a muscle pole 1 use hafnium or hafnium alloy be the raw material spindle heart use hafnium
Or hafnium alloy makes, the periphery in the described axle center that hafnium or hafnium alloy are made uses other metal material to wrap up, and hafnium or hafnium alloy are made
The top in described axle center be described in connect sudden strain of a muscle contact 11.Other metal material parcel hafnium or the pole axle center made of hafnium alloy be for
Countershaft it is formed centrally a powerful complete peripheral protection of comparison, it is to avoid hafnium alloy axle center, because of damage, extends making of hafnium pole
With the life-span, thus reaching safer more permanent application target, the most so parcel is also more beneficial for equal for high temperature of hafnium alloy
Even bear and transmit.
In a further embodiment, it is preferable that other metal material described is wrapped in described hafnium or hafnium alloy periphery and is closing on
Connect the electric discharge circle 12 of the position formation flanged structure dodging contact.Forming the electric discharge circle of this flanged structure, benefit is, due to electric discharge
Circle is 10 times connecing and dodging pole to outer area, and air-flow hinders projection effect to be 30 times connecing and dodging pole, therefore can be preferably
Increase electric charge and discharging rod spheroid contact surface in air, and allow high aerial electric charge be more prone to be gathered in and connect sudden strain of a muscle pole, obtain more
The charging neutrality time, thus strengthen discharging rod aerial charging neutrality ability and scope, make effectively to neutralize negative ions ranges of charge
(diameter) reaches 6000mm-8000mm.
In some other preferred embodiment, other metal material described is specially red copper.Benefit is, considers performance, one-tenth
The aspects such as basis and application timeliness, use red copper cost performance optimum.
In further preferred embodiment, described discharging rod also include gold, silver, copper, copper-clad gold, copper-clad silver, copper is silver-plated, aluminum,
Steel alloy or steel alloy 2# are that connecing of raw material making dodges pole 1.
The present embodiment also provide for a kind of for discharging rod connect sudden strain of a muscle pole 1, it uses hafnium or hafnium alloy to be raw material.
Further, described in connect dodge pole 1 one end for discharging rod connect sudden strain of a muscle bar, the other end is for connecing sudden strain of a muscle contact.Specifically,
The described sudden strain of a muscle pole 1 that connects uses hafnium or hafnium alloy to be that the raw material spindle heart uses hafnium or hafnium alloy to make, the institute that hafnium or hafnium alloy are made
The periphery stating axle center uses other metal material to wrap up, the top in the described axle center that hafnium or hafnium alloy are made be described in connect sudden strain of a muscle contact
11；
Other metal material described is wrapped in described hafnium or hafnium alloy is peripheral and forms flanged structure closing on the position connecing sudden strain of a muscle contact
Electric discharge circle 12.
Other metal material described is gold, silver, copper, aluminum.From the standpoint of performance value and application timeliness etc., other gold described
Belong to material and be preferably red copper.
The discharging rod that this utility model provides is less due to design volume, and rated wind velocity is preferable, it is possible to reach 32.6m/s.
Discharging rod in the effective scheme that this utility model provides, further increases performance, is effectively neutralizing negative ions electricity
Lotus scope, thermal transient ability to bear aspect have been at least up to following level:
Table 1
| Effectively neutralize negative ions ranges of charge (diameter) | 6000mm-8000mm |
| Thermal transient ability to bear (degree Celsius) | More than 4100 |
| Conduction connects sudden strain of a muscle ability (resistivity under 20 degrees Celsius) | 2.6548×10-8Ω/m～5.196 × 10-8Ω/m |
The discharging rod parameter that one of them embodiment provides is as follows:
Table 2
| Parameter | Parameter |
| Master connects sudden strain of a muscle pin | 1 |
| Hafnium pole connects sudden strain of a muscle pole | 6 |
| Red copper connects sudden strain of a muscle pole | 6 |
| Pole is touched in the positive and negative ionization of alloy | 6 |
| Whole height | 1200mm |
| Material | Steel alloy, copper, aluminum, hafnium, steel alloy 2# |
| Sphere diameter | 120mm |
| Main arrester height | 260mm |
In this utility model, the method step for discharging rod performance test is as follows: install two identical height on same ground networks
The discharging rod (wherein one be discharging rod of the present utility model, has one for plain edition discharging rod) of degree, then uniform height with
Under conditions of all equidistantly, discharging rod sample applies lightning impulse discharge current Imax (10/350 μ s)-100KA three times, see
Examine and record its number of times each connecing sudden strain of a muscle.Thus judge that discharging rod conduction connects sudden strain of a muscle ability.Detection method foundation: GB18802.1-2011
" surge protector (SPD) Part I of low-voltage distribution system: performance requirement and test method ", and IEC61643-1:2005
" surge protector (SPD) Part I of low-voltage distribution system: performance requirement and test method ".
In this utility model, the conduction of discharging rod connects sudden strain of a muscle ability resistivity under 20 degrees Celsius and characterizes, and resistivity value is the least,
Then show that the conduction of discharging rod connects sudden strain of a muscle ability the biggest.After tested, the resistivity (under 20 degrees Celsius) of discharging rod of the present utility model
2.6548 × 10-8Ω/m～5.196 × 10-8Between Ω/m, the resistivity (under 20 degrees Celsius) of ordinary lightning rod is then more than this
Numerical value.
To sum up, discharging rod that this utility model provides and connect sudden strain of a muscle pole and can be used for lightning protection and/or lightning-arrest, can be particularly used for
In hyperenvironment lightning protection and/lightning-arrest.
Above content is to combine concrete preferred implementation further detailed description of the utility model, it is impossible to assert this
Being embodied as of utility model is confined to these explanations.For this utility model person of an ordinary skill in the technical field,
Without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should be considered as belonging to this reality
With novel protection domain.
Claims (2)
1. one kind for discharging rod connect sudden strain of a muscle pole, it is characterized in that, bar is dodged for connecing of discharging rod in the described one end dodging pole that connects, the other end is for connecing sudden strain of a muscle contact, the described axle center connecing sudden strain of a muscle pole uses hafnium or hafnium alloy to make, the periphery in the described axle center that hafnium or hafnium alloy are made uses other metal material to wrap up, the top in the described axle center that hafnium or hafnium alloy are made be described in connect sudden strain of a muscle contact；
Other metal material described is selected from gold, silver, copper or aluminum.
The most according to claim 1 connect sudden strain of a muscle pole, it is characterised in that other metal material described is wrapped in described hafnium or hafnium alloy is peripheral and connects described in close on and dodges the position of contact and form the electric discharge circle of flanged structure；
Other metal material described is selected from gold, silver, copper or aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521041997.1U CN205489005U (en) | 2015-12-15 | 2015-12-15 | A connect and dodge utmost point post for lightning rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521041997.1U CN205489005U (en) | 2015-12-15 | 2015-12-15 | A connect and dodge utmost point post for lightning rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205489005U true CN205489005U (en) | 2016-08-17 |
Family
ID=56661219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521041997.1U Active CN205489005U (en) | 2015-12-15 | 2015-12-15 | A connect and dodge utmost point post for lightning rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205489005U (en) |
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2015
- 2015-12-15 CN CN201521041997.1U patent/CN205489005U/en active Active
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