CN202696102U - Lightning protection system for equipment and facilities in container yards - Google Patents
Lightning protection system for equipment and facilities in container yards Download PDFInfo
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- CN202696102U CN202696102U CN 201220277633 CN201220277633U CN202696102U CN 202696102 U CN202696102 U CN 202696102U CN 201220277633 CN201220277633 CN 201220277633 CN 201220277633 U CN201220277633 U CN 201220277633U CN 202696102 U CN202696102 U CN 202696102U
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- lightning
- protection
- surge absorber
- steel tower
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Abstract
The utility model relates to a lightning protection system for equipment and facilities in container yards, which comprises a direct lightning protection device and an indirect lightning protection device, wherein the direct lightning protection device is implemented through that the top end of an iron tower is provided with a pre-discharge lightning arrester and a lightning conductor, the lightning conductor is used for re-protecting a slide wire from suffering from direct lightning, and the iron tower and the lightning conductor are connected through an iron tower body so as to form an arrester-conductor direct-lightning-preventing assembly; and the indirect lightning protection device is implemented through that a slide wire supported iron tower is provided with a primary surge absorber, a power cord inlet box is provided with a primary surge absorber, and an electric room is provided with a secondary surge absorber. According to the utility model, once thunder clouds form a lightning area over a harbour district, an electric discharge phenomenon can be rapidly formed at the top end of the lightning arrester, so that the lightning current is released to the ground, thereby ensuring that the sky over the harbour district is safe and reliable. When the periphery of the system is subjected to lightning and pre-discharge lightning protection, a transient light voltage is induced on an elevated slide wire, the primary surge absorber can control the residual voltage of a line within 2.5 KV, and the secondary surge absorber can control the residual voltage of the line within 1.6 KV.
Description
Technical field
The utility model relates to a kind of lightning protection device, especially a kind of lightning-protection system for Container Yard.
Background technology
At present, container piling site tyre hoister oil changes the successful implementation of electric project, greatly reduces the energy consumption of tyre crane, has improved soot emission and the noise problem of tyre crane.But at thunderstorm season; it is relatively high that oil changes the thunderstruck probability of electric system; though corresponding direct lighting stroke protective device has been installed on beacon, overhead trolley conductor top; but these direct lighting stroke protective devices are perfect not enough; it is also perfect not that oil on the Container Yard changes the lightning protection device that electric system installs; this is so that whole oil changes fail safe, the reliability of electric system has reduced, and has affected the operational efficiency that thunderstorm season oil changes electric system.
For this reason; oil changes improving of electric system lightning protection device and can solve thunder and lightning oil is changed the specific question that electric system threatens; improve the security of system reliability; reduce oil and change the thunderstruck risk of electric system; oil is changed the safe and reliable operation of electric system, improve serviceability rate and utilization rate and play important effect.
Oil changes the electric system lightning protection device can be adopted:
(1) the directly protection of thunder
Direct lightning strike is the thunder discharge phenomenon that occurs between thundercloud and the earth, when thundercloud during near ground, because the electrostatic induction effect makes ground induce the charges of different polarity, exists huge electric field between the two, because the CHARGE DISTRIBUTION in the thundercloud is inhomogeneous and the earth is also uneven.Make the non-uniform electric between thundercloud and the earth, general ground high spot electric field is stronger.When reaching, electric field strength (25-30kv/cm) time, the discharge between thundercloud and the earth protrusion will occur.Direct lightning strike namely occurs, and follows thus and a series of destructions such as electrical effect, thermal effect or mechanical force that produce.
Container Yard did not have special direct thunder safeguard before oil changed electricity; the lightning rod that some protection beacons are only arranged at the High-Pole Lamp tower; when travelling in the protection range at these beacons, tyre crane can prevent the infringement of direct thunder; the just not protection of anti-direct thunder of tyre crane when other regional operations; but because the tyre crane use is F-d system; most of conductively-closed protection of whole electric-control system suffers the situation of broken by lightning rare.
Oil changes after the electricity, although the tip position at overhead trolley conductor has set up the lightning-arrest rope that prevents that direct thunder from invading, but oil changes the mains supply that trolley that electric tyre crane uses the high-altitude to set up provides, and the danger that the rectification system suffers lightning ingress has still increased before changing electricity than oil not.Oil in 2009 changes electric system and be struck by lightning by secondary, and the vestige that suffers direct thunder infringement is all arranged.And the method for original direct thunder protection is in the both sides of a circuit, and the top of copper trolley respectively is equipped with a lightning conducter, and the height of its setting is not subjected to the impact of direct lightning strike by the rolling ball method design of national shocking preventing technology standard law with protection copper trolley.Advantage: invest lowly, construction is simple.Lightning-arrest cable wire adds some by the multiply steel strand wire of two 9MM and hangs stretch-draw annexes and form, and design, form of construction work are all carried out according to the electric industry standard, and be with the trolley synchronous construction, simple and convenient.Shortcoming: because lightning-arrest cable wire is to design according to the electric industry standard; and the circuit of electric industry overhead wire is longer; lightning strike spot and the distance that needs protection between the object are longer when being subject to being struck by lightning; lightning wave energy attenuation when transmission is large; and oil changes the circuit of electricity and the near distance of load is similar to zero distance, and therefore the reliability of protection can only reach 80% protection probability.
(2) protection of indirect stroke
Indirect stroke is that the induction owing to thunder and lightning makes system overvoltage occur, can be divided into two classes again according to induction situation difference.
A. electrostatic induction overvoltage
When thundercloud during near ground or wire, will be on ground or wire induce a large amount of charges of different polarity, when thundercloud exists, these charges of different polarity are subjected to the constraint of thundercloud electric field, form static electric charge, after thundercloud discharged over the ground, its electric field disappeared, and the charges of different polarity that originally fettered on the wire become free electron because losing the electric field constraint.Free electron is along wire to two side shiftings, forms very highly (can reach 500-600kv) voltage, thereby make system suffer overvoltage.
B. electromagnetic induction overvoltage
Taken shelter from the thunder rope or lightning rod when guiding the earth into when lightning wave, will produce huge lightning current, this lightning current is vertiginous high-frequency current, and the lightning current that changes produces powerful variation magnetic field around it.This magnetic field produces very high induced voltage with (such as electric equipment, transmission line etc.) on the nigh metallic conductor.
Tyre crane is because the probability that is struck by lightning is very low, and former design does not have the indirect stroke safeguard measure, and oil does not increase the indirect stroke safeguard measure after changing electricity yet, and this is so that system is subject to may also having strengthened of indirect stroke invasion.By the system overvoltage that indirect stroke causes, the harm that oil is changed electric system is very large, especially can damage the electronic devices and components of system.
At present, the safeguard procedures of indirect stroke:
A., power supply class SPD is installed, and communication network class SPD, SPD protects the conduct electricity that electronic electric equipment causes by lightning strike and other interference to gush superpotential effective means.
B. equipotential connects, and points out in the IEC standard that it is the important component part of indirect stroke protection that equipotential connection connects, and its purpose is to reduce the potential difference that lightning current causes.
Do not have the ready-made lightning protection standard can reference because oil changes electric tyre crane, so the indirect stroke protection can only be with reference to the lightning protection standard of building.
The utility model content
The utility model is that a kind of Container Yard installations and facilities lightning-protection system will be provided, and is used for solving tyre crane oil and changes the direct thunder protection of the rear Container Yard equipment of electricity and the technical problem of indirect stroke protection.
The technical solution of the utility model is: a kind of Container Yard installations and facilities lightning-protection system, comprise direct thunder protective device and indirect stroke protector, direct thunder protective device: on the steel tower top of tyre crane overhead trolley conductor electric power system the pre-arcing lightning rod is installed and is again protected slip to exempt from the lightning conducter of direct thunder, steel tower and lightning conducter are connected to form pin, the anti-direct thunder assembly of line by the steel tower body; Described indirect stroke protector: slip supports steel tower the one-level surge absorber is installed, and the electric power incoming line case is installed the one-level surge absorber, at electrical house the secondary surge absorber is installed.
Difference in height between the pre-arcing lightning rod of installing on tyre crane overhead trolley conductor electric power system steel tower top and the overhead trolley conductor that needs protection is 11 meters, and protection radius is greater than 109 meters.
Lightning conducter is leaded up to the vertical ladder ground connection of electric power system steel tower, and another road is by the discharge flat iron grounding.The pre-arcing lightning rod is that France produces PDA π X-60 pre-arcing lightning rod.
The beneficial effects of the utility model are:
The utility model is at the domestic PDA π of tyre crane overhead trolley conductor electric power system steel tower top Method for Installation X-60 pre-arcing lightning rod.Be connected with the lightning conducter on the steel tower, form pin, line lightning protection assembly.In case thundercloud is arranged harbor district is overhead when forming lightning strike area, can form electric discharge phenomena on the top of lightning rod rapidly, with the lightning current the earth of releasing, thereby the assurance harbor district sky is safe and reliable.
The effective depth that oil changes between the PDA π X-60 pre-arcing lightning rod that electric system installs and the overhead trolley conductor that needs protection has 11 meters, and protection radius meets designing requirement fully greater than 109 meters.
The reliable flat iron grounding discharge that connects of lightning conducter two-way, the one tunnel utilizes existing vertical ladder, and newly-increased one tunnel discharge band iron has reduced discharge resistance in addition.Process the ground connection of former lightning-arrest rope, reach the protective value that reliable ground has improved original lightning-arrest rope.
The electric power incoming line case is installed the one-level surge absorber, at electrical house the secondary surge absorber is installed, when system was subject to being struck by lightning, the one-level surge absorber can be controlled at the residual voltage of circuit within the 2.5KV, the secondary surge absorber can be controlled at the residual voltage of circuit within the 1.6KV.
Description of drawings
Fig. 1 is mounting structure schematic diagram of the present utility model;
Fig. 2 is the schematic diagram that lightning conducter passes through the reliable flat iron grounding discharge that connects of two-way.
Embodiment
Such as Fig. 1, shown in 2, a kind of Container Yard installations and facilities lightning-protection system, comprise direct thunder protective device and indirect stroke protector, direct thunder protective device: on steel tower 1 top of tyre crane overhead trolley conductor electric power system pre-arcing lightning rod 2 is installed and is again protected slip to exempt from the lightning conducter 3 of direct thunder, steel tower 1 and lightning conducter 3 are connected to form pin, the anti-direct thunder assembly of line by the steel tower body; Described indirect stroke protector: slip supports steel tower 9 the one-level surge absorber is installed, and electric power incoming line case 5 is installed the one-level surge absorber, at electrical house 6 the secondary surge absorber is installed.The pre-arcing lightning rod is that France produces PDA π X-60 pre-arcing lightning rod.
Difference in height between the PDA π X-60 pre-arcing lightning rod 2 of installing on tyre crane overhead trolley conductor electric power system steel tower top and the overhead trolley conductor 4 that needs protection is 11 meters, and protection radius is greater than 109 meters.Lightning conducter 3 is leaded up to the vertical ladder 8 of electric power system steel tower, and another road is by discharge band iron 7 ground connection.
The technical parameter of PDA π X-60 pre-arcing lightning rod
| The effective depth of lightning rod | The | 2 | 3 | 4 | 5 | 10 |
| Level 1 protection radius | 60μs | 31 | 47 | 63 | 79 | 80 |
| | 60μs | 39 | 58 | 78 | 97 | 99 |
| Level 3 protection radius | 60μs | 43 | 64 | 85 | 107 | 109 |
PDA π X-60 pre-arcing lightning rod technical indicator: when needle point was higher than 4 meters of protected objects, its protection radius just can reach 85 meters.The maximum spacing that our oil changes between the electric overhead trolley conductor electric power system steel tower is 150 meters; change on the electric overhead trolley conductor electric power system steel tower at 72 oil and according to being higher than 4 meters height of trolley PDA π X-60 pre-arcing lightning rod to be installed; just can change the direct thunder protection of electric system to whole oil covers; the effective depth that our oil changes between the PDA π X-60 pre-arcing lightning rod that electric system installs and the overhead trolley conductor that needs protection has 11 meters; protection radius meets designing requirement fully greater than 109 meters.See accompanying drawing 1.
Reliable band iron (40*4) the ground connection discharge that connects of two-way, the one tunnel utilizes existing vertical ladder 8, and newly-increased one tunnel discharge band iron 7 has reduced discharge resistance in addition.Process the ground connection of former lightning-arrest rope, reach the protective value that reliable ground has improved original lightning-arrest rope.See accompanying drawing 2.
The indirect stroke protection that the utility model adopts:
Indirect stroke is that the induction owing to thunder and lightning makes system overvoltage occur, can be divided into two classes again according to induction situation difference.
A. electrostatic induction overvoltage
When thundercloud during near ground or wire, will be on ground or wire induce a large amount of charges of different polarity, when thundercloud exists, these charges of different polarity are subjected to the constraint of thundercloud electric field, form static electric charge, after thundercloud discharged over the ground, its electric field disappeared, and the charges of different polarity that originally fettered on the wire become free electron because losing the electric field constraint.Free electron is along wire to two side shiftings, forms very highly (can reach 500-600kv) voltage, thereby make system suffer overvoltage.
B. electromagnetic induction overvoltage
Taken shelter from the thunder rope or lightning rod when guiding the earth into when lightning wave, will produce huge lightning current, this lightning current is vertiginous high-frequency current, and the lightning current that changes produces powerful variation magnetic field around it.This magnetic field produces very high induced voltage with (such as electric equipment, transmission line etc.) on the nigh metallic conductor.
Tyre crane is because the probability that is struck by lightning is very low, and former design does not have the indirect stroke safeguard measure, and oil does not increase the indirect stroke safeguard measure after changing electricity yet, and this is so that system is subject to may also having strengthened of indirect stroke invasion.By the system overvoltage that indirect stroke causes, the harm that oil is changed electric system is very large, especially can damage the electronic devices and components of system.
The safeguard procedures of indirect stroke:
C., power supply class SPD is installed, and communication network class SPD, SPD protects the conduct electricity that electronic electric equipment causes by lightning strike and other interference to gush superpotential effective means.
D. equipotential connects, and points out in the IEC standard that it is the important component part of indirect stroke protection that equipotential connection connects, and its purpose is to reduce the potential difference that lightning current causes.
Do not have the ready-made lightning protection standard can reference because oil changes electric tyre crane, so the indirect stroke protection be with reference to the lightning protection standard of building.The protected mode of power supply class SPD is installed at mains side.Surge absorber can be divided into again one-level surge absorber and secondary surge absorber; when system is subject to being struck by lightning; the one-level surge absorber can be controlled at the residual voltage of circuit within the 2.5KV, the secondary surge absorber can be controlled at the residual voltage of circuit within the 1.6KV; the protection of one-level secondary need to be greater than 10 meters distance, and our the electric power incoming line case of tyre crane is eligible to the distance of electrical house.Therefore, Adopts measure is at the electric power incoming line case one-level surge absorber to be installed, and at electrical house the secondary surge absorber is installed
The technical parameter of SPD
| ? | The voltage protection level | Rated operational voltage | Lightning impulse current | Nominal discharge current | Response time | ? |
| The one-level surge protection | 2.5KV | 440V | 80KA | 40KA | 100ns | ? |
| The secondary surge protection | 1.6KV | 440V | 40KA | 20KA | 25ns | ? |
Claims (4)
1. Container Yard installations and facilities lightning-protection system, comprise direct thunder protective device and indirect stroke protector, it is characterized in that: described direct thunder protective device: on steel tower (1) top of tyre crane overhead trolley conductor electric power system pre-arcing lightning rod (2) is installed and is again protected slip to exempt from the lightning conducter (3) of direct thunder, steel tower (1) and lightning conducter (3) are connected to form pin, the anti-direct thunder assembly of line by the steel tower body; Described indirect stroke protector: slip supports steel tower (9) the one-level surge absorber is installed, and electric power incoming line case (5) is installed the one-level surge absorber, at electrical house (6) the secondary surge absorber is installed.
2. Container Yard installations and facilities lightning-protection system according to claim 1 is characterized in that: described lightning conducter (3) is leaded up to vertical ladder (8) ground connection of electric power system steel tower, and another road is by discharge band iron (7) ground connection.
3. Container Yard installations and facilities lightning-protection system according to claim 1; it is characterized in that: the difference in height between the described pre-arcing lightning rod (2) of installing on tyre crane overhead trolley conductor electric power system steel tower top and the overhead trolley conductor (4) that needs protection is 11 meters, and protection radius is greater than 109 meters.
4. according to claim 1 to 3 each described Container Yard installations and facilities lightning-protection systems, it is characterized in that: described pre-arcing lightning rod (2) produces PDA π X-60 pre-arcing lightning rod for France.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220277633 CN202696102U (en) | 2012-06-13 | 2012-06-13 | Lightning protection system for equipment and facilities in container yards |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220277633 CN202696102U (en) | 2012-06-13 | 2012-06-13 | Lightning protection system for equipment and facilities in container yards |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202696102U true CN202696102U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220277633 Expired - Lifetime CN202696102U (en) | 2012-06-13 | 2012-06-13 | Lightning protection system for equipment and facilities in container yards |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202696102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694360A (en) * | 2012-06-13 | 2012-09-26 | 上海国际港务（集团）股份有限公司振东集装箱码头分公司 | Lightning-protection system of equipment and facilities of container yard |
-
2012
- 2012-06-13 CN CN 201220277633 patent/CN202696102U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694360A (en) * | 2012-06-13 | 2012-09-26 | 上海国际港务（集团）股份有限公司振东集装箱码头分公司 | Lightning-protection system of equipment and facilities of container yard |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |