CN2573428Y - Secondary arc eliminating 'on' device for floating-roof tank - Google Patents
Secondary arc eliminating 'on' device for floating-roof tank Download PDFInfo
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- CN2573428Y CN2573428Y CN 02282523 CN02282523U CN2573428Y CN 2573428 Y CN2573428 Y CN 2573428Y CN 02282523 CN02282523 CN 02282523 CN 02282523 U CN02282523 U CN 02282523U CN 2573428 Y CN2573428 Y CN 2573428Y
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Abstract
The utility model discloses a conduction device with secondary arc elimination for floating-roof tanks. The utility model comprises a tank body, a floating plate, fixed ground wires, a support frame which is fixedly connected with the tank body, a fixed support shaft, a ground wire bin assembly which is wound with ground cables, a spring bin assembly which is arranged on one side of the ground wire bin assembly, a flow guide ring which is connected with the other side of the ground wire bin assembly, an elastic flow guide sheet, and a labyrinth seal conducting ring, wherein, the elastic flow guide sheet and the labyrinth seal conducting ring are glidingly connected with the flow guide ring and are connected with the fixed ground wires. The outer end of the elastic flow guide sheet is provided with fastening nuts, locking nuts and pressing springs of the flow guide sheet screwed on the fixing support shaft. The peripheries of the fastening nuts, the locking nuts and the pressing springs of the flow guide sheet are provided with outward extension flanges. One end of the ground cable is fixedly connected with the ground wire bin assembly, and the other end of the ground cable is connected with the floating plate. When the floating plate descends or arises, the ground cable can automatically extend or automatically wind and retract along with the floating plate, and the ground cable always keeps tension state. Thus, the utility model has a good electrical conduction passage between the floating plate and the tank body of the floating roof tank, and thus effectively eliminates the secondary arc.
Description
Technical field
The utility model relates to a kind of floating roof tank that is used for oil storage, in particular for the eliminating secondary arc by floater conducting device that is provided with for the secondary arc of eliminating floating roof tank.
Background technology
Floating roof tank as oil storage is used mainly comprises tank body, floating plate etc.Floating roof tank is in the middle of using, and in general, service condition still is good, seldom sees the generation of some fire accidents.But the fire that causes because of thunderbolt still has, and tracing it to its cause is analyzed as follows:
1, bound charge/secondary arc is a thunderbolt major cause on fire
Some floating roof tanks are not rarely seen because of the thunderbolt presence of fire both at home and abroad, although quantity seldom, loss is serious, caused that the height of production and security department is watched attentively.670,000 barrels of light crude floating roof tanks of nineteen ninety Nigeria are because on fire being burnt of thunderbolt.Twice of No. 102 50,000 side's crude oil of wide petrochemical industry in 1997 floating roof tank is on fire because of being struck by lightning.No. 103 adjacent crude oil floating roof tanks were struck by lightning on fire again in 1999.Fortunately the condition of a fire is heavy and fire-fighting is timely, does not lead to big accident.
Lightning protection all is equipped with in the tank field, and storage tank is in protection domain, and thunder and lightning can not hit at floating roof tank, also hits the foundation of floating roof tank without any " direct lightning strike ".
According to statistics and analyze, at thunderstorm weather, it is the quadratic effect of thunder and lightning that floating roof tank and metal structures are caused leading cause of fire, i.e. bound charge (Bound Charge) and secondary arc (Secondary Arc).Cause that by this quadratic effect the probability of petrochemical industry storage tank fire is more than 1000 times of direct lightning strike.
Therefore, floating roof tank when thunderbolt reason on fire from bound charge/secondary arc.
2, the generation of bound charge/secondary arc
In the cumulonimbus forming process, at atmospheric electric field, the temperature difference plays electrical effect, and fragmentation plays electrical effect and acts on down simultaneously, and positive and negative charge gathers at the different parts of different cloud clusters and cloud.Through motion, can reach cloud layer bottom (being generally negative charge) with going up the heavier material of identical charges quality, can arrive cloud layer top (being generally positive charge) with the material of going up the identical charges lighter weight, this charging cloud layer can form high-intensity electrostatic field, before discharge over the ground, the electrostatic field of cloud layer bottom rises to 10-30 kilovolt/rice from initial 10 volts.As shown in Figure 1, under so strong electrostatic field induction, the earth comprises that structures in the above also are recharged, and the charging scope is called " electricity hides shadow " 52 (ELECTRIC SHADOW), it equates with cloud layer 51 areas of top but polarity opposite (the cloud layer bottom is a negative pole, and big ground surface is anodal).And the earth 53 that electricity hides outside the shadow 52 is negative pole relatively.
The earth and all structures (no matter being conductor or non-conductor) that are in the electricity screening shadow 52 all are sensed as positive electricity.Be included in tank body 50, floating plate and the storage medium of its scope internal floating roof tank.This induction is slow relatively, does not have the electric arc that electrostatic field causes this moment.
High strength electrostatic field cloud layer is during near ground, along with electric field strengthens forming descending guide, ground protrusion object (massif, structures) form upwards streamer, the two meets and forms discharge over the ground, promptly after the thunderbolt, the negative charge of cloud layer 51 bottoms and the positive charge rapidly " neutralization " of the earth 53 below it, the whole process (comprising that the guide discharges, main discharge, surplus light discharge) of thunderbolt has only 20 milliseconds, the earth becomes negative pole by positive pole immediately, in the moment of this polarity transformation, all and the earth have the structures of good earth together with the synchronous reverse of polarity of the earth, and with the not satisfactory structures of the earth ground connection as: floating top pot floating dish can be detained constraint (just) electric charge, can be by " non-circuit ground " to the earth 53 that is in negative pole, comprise and the earth 53 eqipotential structures, as in the tank body 50 of floating roof tank and discharge, i.e. secondary arc.
3, bound charge/secondary arc is to the harm of floating roof tank
Bound charge and secondary arc have tangible influence for the safety of floating roof tank.
As shown in Figure 2, before being increased to discharge thunderbolt over the ground from charging cloud layer 51 pairs of earth electric fields, floating roof tank tank body 50 and floating plate 60 all with the earth equipotential (positive pole), over the ground after the discharge thunderbolt, tank body and the earth are converted to zero level synchronously, and lack enough being electrically connected (having impedance) between metallo-floating plate 60 and the tank body 50, can not with the tank body 50 synchronous reverses of polarity, be detained bound charge above and between floating plate 60 and tank body 50, discharge immediately (secondary arc).If locate to reach the oil gas of blast mixture ratio at the annular space (RIM SPACE) of floating roof tank, will cause fire.
If do not cause the inducement (comprising complex conditions and landform and lightning protections such as meteorology) of discharge thunderbolt over the ground, charging cloud layer 51 may be weakened or be neutralized, and secondary arc just can not take place.
4, electric path between floating plate and the tank body and impedance
The tank skin of floating plate and tank body exists the analysis of causes of impedance as follows:
Floating ladder on the floating roof tank, guidepost, liquidometer, hardware such as foam generator and tank body have good being electrically connected, and the tank skin of they and tank body is eqipotential all the time.
But for floating plate, being electrically connected then of tank skin of it and tank body may go wrong, and reason is as follows:
The tank skin of floating plate and tank body be electrically connected following three to four kinds of loops
1) from tank deck 24 meters long 25mm of two treaties along floating ladder down to floating plate
2The copper wire braided wire.Having only this is being electrically connected of real meaning, and two ends connect according to grounding requirement.But not enough is that lead is long, the about 150-250 ohm of the impedance under the thunder and lightning frequency.
2) floating ladder connects the tank skin and the floating plate of tank body, and floating ladder rolls along the track on floating plate at floating plate lifting wheel shaft, and contact resistance is big and along with the corrosion meeting on floating plate surface is bigger.
3) lead the static sheet in the floating top sealing.Leading the static sheet is closely with being connected of floating plate one side, but problem appears at being electrically connected with the tank skin of tank body.All there is one deck wax the tank skin inboard of all tank bodies, the compound of colloid and other organic components, the metal surface of the tank skin of tank body is covered, metal is led between the tank skin metal surface of static sheet and tank body and is insulated by this layer cover, very big resistance is arranged, lead electrostatic interaction thereby on cooresponding degree, lose.
4) be welded on the paraffin scraper that contacts with the tank skin of tank body on the floating roof tank.Paraffin scraper will scrape attached to the dung on the tank skin of tank body (mainly being wax, colloid) because the effect of weight or spring is affixed to the tank skin of tank body.From the production practice of storage tank, the paraffin cutting effect of most of paraffin scrapers is not satisfactory.Therefore be insulated mostly between the tank skin of paraffin scraper and tank body, it is also unreliable to be electrically connected.The storage tank of finished oil and other lightweight media does not then have paraffin scraper.
Direct current resistance can not be only considered in being electrically connected between the tank skin of floating plate and tank body, and should be according to the impulse resistance analysis.Instantaneous what change from high potential to " zero " current potential, impulse resistance is more much bigger than direct current resistance.
5, at present to fire accident and prevent the method brief introduction
According to Mr.'s Xu Baohua introduction of pipeline office, when he investigated floating roof tank in the U.S., the U.S side had been introduced secondary seal and has been led the installation interval of static sheet and the relation of safety.According to standard, this is spaced apart 3 meters.But floating roof tank is on fire because of being struck by lightning several times, and the requirement according to Mr. Xu Baohua afterwards changes the interval into 1 meter, no longer has an accident.At least from analyzing in logic, originally on fire is that secondary arc causes, encrypt lead the static sheet weaken or eliminated that secondary arc takes place may and degree.
According to above situation, analyze the reason of fire of wide petrochemical industry 10,2#5 ten thousand side's crude oil floating roof tanks here again.
The once sealing of this storage tank and weather shield are because period of service is long, and structure is aging, occur obvious gap between the tank skin of sealing and tank body, and annular spacing place oil and gas leakage is more, becomes disaster hidden-trouble.
About the reason on fire of being struck by lightning, the relevant person thinks near the 102# jar hill is arranged, and it is relevant with hill to be struck by lightning.Without any the eyewitness who sees that direct lightning strike is beaten at storage tank, do not find the at all vestige of thunderbolt at the tank skin and the floating plate boundary plank place of fire part tank body yet, can negate direct lightning strike therefore.
Can assert tentatively that near hill the storage tank and floating roof tank hide under the shadow at same electricity, induce the charging cloud layer to discharge the oil gas that between the tank skin of floating plate boundary plank and tank body, produces secondary arc and ignite and leak over the ground owing to above-mentioned bound charge.
After deliberation, adopted sealing of immersion type topping up and face contact-type secondary seal, reduced the oil gas loss more than 90%.
After 102# and 109# floating roof tank have been reequiped above-mentioned sealing, accident on fire does not appear again, but but adjacent for 10,3#5 ten thousand side's crude oil floating roof tanks of transforming on fire after being struck by lightning, because this storage tank sealing condition is bad, more oil and gas leakage is arranged, ignite oil gas and on fire of secondary arc.
Above-mentioned statement of facts reduce the danger that the oil gas loss has avoided fire to take place, but the mechanism that produces secondary arc is not eliminated.Secondary arc is the basic reason on fire of igniting, if this cause do not eliminate, even good sealing is arranged, can not stop oil and gas leakage in the storage tank fully, at the calm weather of infrabar, the oil gas that leaks out can deposit at annular spacing, for another there being extraneous combustible to occur, also with presence of fire.Moreover do not get rid of sealing and the damaged oil and gas leakage that causes occurs, these all will cause generation again on fire.
Although most storage tank is caused that because of secondary arc the probability of fire is very low, must thoroughly eliminate, just like forbidding in the refinery, oil depot smoking is the same, and no matter probability is how low does not allow yet, and the loss that accident is brought is with unimaginable.
Thoroughly eliminating secondary arc effectively is the essential measure of getting rid of potential safety hazard.Key is to set up electric path good between floating plate and the tank body, eliminates fire and must at utmost reduce bound charge and secondary arc.
6, the still not mentioned secondary arc of existing specification
Present tank design is abideed by " the vertical round steel welding tank design standard of SH-3046 petrochemical complex ".(code requirement is not less than 16mm for the quantity of leading the static copper conductor from the tank deck to the floating plate (code requirement is no less than two, and actual design is two) and cross section
2, actual design is different because of designing institute) and irrelevant with the tank diameter size.
In GB 13348-92 " liquid petroleum product electrostatic safety rules ", SY/T6340-1998 " oil industry electrostatic prevention recommended practice ", among the GB15599-1995 " oil and petroleum installations thunder and lightning safety standard ", mentioned anti-static precautions all is the electrostatic charge constraint of only considering that petroleum products produces when flowing, and these measures are undoubtedly correct.But do not mention all that in these codes and standards thunder and lightning produces the phenomenon and the safeguard procedures of secondary arc, did not propose the method and the device thereof of eliminating secondary arc by floater yet.
The utility model content
The technical problems to be solved in the utility model provides a kind of eliminating secondary arc by floater conducting device, to eliminate the bound charge/secondary arc on the floating plate, prevents the fire that floating roof tank causes because of thunderbolt.For addressing the above problem, the technical scheme that the utility model adopted is: a kind of eliminating secondary arc by floater conducting device, comprise tank body, floating plate, fixing ground wire, and it is characterized in that it also comprises: two supports that are fixedly connected on the tank body top circumference; One is fixed on the fixed-bearing axis on the support; One is wound with the ground wire storehouse assembly set of earth cable, and the inner of this earth cable is fixed on the assembly set of ground wire storehouse, captives joint with floating plate in the outer end; One is located at the spring storehouse assembly set of assembly set one side, ground wire storehouse; The static that is located at assembly set another side, ground wire storehouse is derived parts.
The described ground wire storehouse assembly set that is wound with earth cable also comprises can be around the ground wire storage warehouse of fixed-bearing axis rotation, but the middle part of this ground wire storage warehouse is provided with the bearing box portion of captive joint earth cable the inner, is provided with cylindrical bearing between bearing box portion and the fixed-bearing axis.
The described spring storehouse assembly set that is located at assembly set one side, ground wire storehouse comprises: with the ground wire storage warehouse affixed be one whole and can with its spring storage warehouse that rotates around fixed-bearing axis synchronously; The middle part of this spring storage warehouse is provided with an axle sleeve that is fixed on the fixed-bearing axis, and its left end contacts with the right side of cylindrical bearing; Roll up the valiant energy stroage spring that has in the space that described axle sleeve and spring storage warehouse inside are constituted, its head is fixed on the axle sleeve, and its afterbody is fixed on the inwall of spring storage warehouse.
Described static is derived parts and is comprised: be fixed in the guide ring on the assembly set left surface of ground wire storehouse; The elasticity flow deflector of one end and guide ring moving contact and labyrinth packing conducting ring, all with fixedly ground wire is affixed for this elasticity flow deflector and labyrinth packing conducting ring, and its outer end is provided with and is screwed in that peripheral zone has the flow deflector of the flange that stretches out to tighten nut and jam nut on the fixed-bearing axis; This flow deflector tightens between the outward extending flange of periphery of nut and the labyrinth packing conducting ring and is provided with stage clip.
Described earth cable is a multiply soft copper silk braided wire.
After adopting such scheme, the utility model compared with prior art has following beneficial effect:
Because a kind of eliminating secondary arc by floater conducting device provided by the utility model, have impedance at the floating plate of floating roof tank in the prior art and the tank skin of tank body, make secondary arc that the bound charge that is detained on the floating plate produces by " non-circuit ground " during thunderbolt and the initiation fire problem, the floating roof tank top is fixedly connected with the eliminating secondary arc by floater conducting device, wherein an end of earth cable is fixed on the eliminating secondary arc by floater conducting device that connects as one with tank body, this eliminating secondary arc by floater conducting device, sliding block joint by guide ring and elasticity flow deflector and labyrinth packing conducting ring, and formation two-way static guiding system, add flow deflector and tighten the sealing function that the nut peripheral zone has outward extending flange and labyrinth packing conducting ring, and keep good dynamic the connection with fixing ground wire actv., the other end of earth cable is connected on the floating plate securely, no matter floating plate rises still descends, earth cable can extend or rolling, under the effect of energy stroage spring, earth cable remains tension, therefore, just set up good electric path between the tank skin of floating plate and tank body.During work, the floating plate of floating roof tank is in most cases in the tank top, and therefore, the electric equivalent length of earth cable has only 3-4 rice, and impedance is minimum.Even at the bottom of floating plate drops to jar, also have only about 15 meters, the impedance of earth cable under the thunder and lightning frequency only has 1 Europe.The good electric path that above-mentioned eliminating secondary arc by floater conducting device is set up, be enough to farthest reduce or eliminate the bound charge that is detained on the floating plate, can stop the generation of secondary arc, thereby thoroughly eliminate the fire that floating roof tank is caused because of thunderbolt.
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is done to describe in further detail.
Description of drawings
Fig. 1 be in the prior art cloud layer to the charge condition scheme drawing of the earth;
Fig. 2 is bound charge and the secondary arc situation scheme drawing on when thunderbolt floating top pot floating dish in the prior art;
Fig. 3 is the overall connection situation scheme drawing of the utility model eliminating secondary arc by floater conducting device;
Fig. 4 is the A bilge construction enlarged diagram of Fig. 3.
The specific embodiment
As depicted in figs. 1 and 2, in background technology, to cloud layer to the generation of charging, bound charge and the secondary arc of the earth and detailed description has been done in the harm of floating roof tank initiation fire, so repeat no more.For solving the bound charge/secondary arc problem on the floating plate, the utility model proposes a kind of eliminating secondary arc by floater conducting device, this eliminating secondary arc by floater conducting device is provided with at the tank body top of floating roof tank, quantity will be determined according to the amount of capacity of floating roof tank, basic skills is that the per 1000 sq m areas of the floating plate of floating roof tank are provided with 1 cover, to the floating roof tank of 15 ten thousand steres the 1-8 cover is set for 5 kilosteres, and is evenly arranged on the tank body top circumference of floating roof tank.According to the method, the quantity that co-content floating roof tank not is provided with floating roof tank electrostatic conducting device is as shown in the table:
| The floating roof tank capacity | Diameter (rice) | Conducting device quantity |
| 5,000 sides | 22 | 1 |
| 10,000 sides | 28.5 | 1 |
| 20,000 sides | 40.5 | 2 |
| 30,000 sides | 48.5 | 2 |
| 50,000 | 60 | 3 |
| 100,000 sides | 80 | 5 |
| 12.5 ten thousand sides | 90 | 6 |
| 150,000 sides | 100 | 8 |
Fig. 3 and Fig. 4 show the annexation and the architectural feature thereof of above-mentioned eliminating secondary arc by floater conducting device, the concrete structure of this device comprises tank body 50, floating plate 60, and fixedly ground wire 11, be fixedly connected with on 7, two supports 7 of two supports on tank body 50 tops and be fixed with fixed-bearing axis 5.The middle part of fixed-bearing axis 5 is with ground wire storehouse assembly set 1 and spring storehouse assembly set 2.This ground wire storehouse assembly set 1 comprises ground wire storage warehouse 1B, the middle part of this ground wire storage warehouse 1B is provided with the 1C of bearing box portion, be provided with cylindrical bearing 3,4 between 1C of bearing box portion and the fixed-bearing axis 5, thereby ground wire storage warehouse 1B can rotate around fixed-bearing axis 5, be wound with earth cable 1A in this ground wire storage warehouse 1B, this earth cable 1A is a multiply soft copper silk braided wire, its the inner is fixed on the bearing box 1C of ground wire storehouse assembly set, available welding is fixed, captiveing joint with floating plate 60 in its outer end, can be connected on its foam dam inside bottom.This spring storehouse assembly set 2 is located at a side of ground wire storehouse assembly set 1, comprise the affixed holistic spring storage warehouse 2A of being with ground wire storage warehouse 1B, so this spring storage warehouse 2A can rotate around fixed-bearing axis 5 synchronously with ground wire storage warehouse 1B, the middle part of this spring storage warehouse 2A is provided with an axle sleeve 2B who is fixed on the fixed-bearing axis 5, available key 6 or screw are affixed with itself and fixed-bearing axis 5, and axle sleeve 2B left end contacts with the right side of cylindrical bearing 4; Be wound with energy stroage spring 2C in the space that axle sleeve 2B and spring storage warehouse 2A inside are constituted, its head is fixed on the axle sleeve 2B, and its afterbody is fixed on the inwall of spring storage warehouse 2A.On the another side of ground wire storehouse assembly set 1, be provided with static and derive parts with two-way static guiding system.This static with two-way static guiding system is derived parts and is comprised the guide ring 8 that is fixed on assembly set 1 left surface of ground wire storehouse, and it can penetrate ground wire storage warehouse 1B directly and the inner welding of 1C of bearing box portion or earth cable.Flexible flow deflector 9 of the left end moving contact of guide ring 8 and labyrinth packing conducting ring 20, this elasticity flow deflector 9 is a 1-6 spare, present embodiment is 4, this elasticity flow deflector 9 and labyrinth packing conducting ring 20 are all captiveed joint with fixing ground wire 11, and formation two-way static guiding system, its outer end is provided with and is screwed in the stretch out flow deflector of flange of peripheral zone on the fixed-bearing axis 5 and tightens nut 10 and jam nut 12, and the stretch out flow deflector of flange of elasticity flow deflector 9 and peripheral zone tightens nut 10 and is fixed on the fixed-bearing axis 5 by jam nut 12.The stretch out external diameter of flange and labyrinth packing conducting ring 20 of the periphery that this flow deflector tightens nut 10 matches, and is provided with stage clip 21 therebetween.Above-mentioned earth cable is the multiply soft copper silk braided wire of 5.08 kilograms of quality, 2.2 millimeters of long 20 meters, wide 33 millimeters, thickness.40 millimeters of the inner widths of ground wire storage warehouse, 60 millimeters of base diameter Φ, 280 millimeters of outside dimension Φ.64 millimeters of spring storage warehouse inner widths, 40 millimeters of base diameter Φ, 140 millimeters of imperial palace ring Φ.Energy stroage spring is wide 60 millimeters, 940 kilograms one millimeter of thick 0.82 millimeter, long 18 meters, maximum torque.
The principle of work of the utility model eliminating secondary arc by floater conducting device: because this eliminating secondary arc by floater conducting device, be that its support 7 is fixedly connected on the tank body 50 at floating roof tank top, wherein the end of earth cable 1A is fixed on this device, the other end of earth cable 1A is fixed on the floating plate 60, thereby set up the good path that is electrically connected between floating plate 60 and the tank body 50, no matter be the lifting of floating plate 60, under the effect of energy stroage spring 2C, all make earth cable 1A automatic deploying and retracting and keep tension, pull out, regain as the box chi.When floating plate 60 descends, the earth cable 1A elongation that thereupon descends, and make ground wire storage warehouse 1B and the spring storage warehouse 2A that connects as one with it rotates the energy stroage spring 2C accumulating capability that this spring storage warehouse 2A is interior synchronously around fixed-bearing axis 5; When floating plate 60 rose, earth cable 1A rose thereupon, this moment energy stroage spring 2 releasabilities, this ground wire storage warehouse 1B and the spring storage warehouse 2A that connects as one with it rotate and earth cable 1A are rolled recovery around fixed-bearing axis 5 backs synchronously.
Because a side of ground wire storehouse assembly set 1 is provided with the static with two-way static guiding system and derives parts, its one side that is fixed on the guide ring 8 on the ground wire storehouse assembly set 1 is connected with the earth cable 1A of ground wire storehouse assembly set, its another side, be left end and the elasticity flow deflector 9 and 20 moving contacts of labyrinth packing conducting ring of guide ring 8, elasticity flow deflector 9 and labyrinth packing conducting ring 20 are connected with fixing ground wire 11 again, thereby constitute just fixedly that ground wire 11 is connected with ground wire storehouse assembly set 1 interior the dynamic of earth cable 1A.Owing to being in diversed, this elasticity flow deflector 9 tightens nut 10 and jam nut 12 impaction states again, labyrinth packing conducting ring 20 is all the time by stage clip 21 impaction states, add conducting strip and tighten the sealing function that the nut peripheral zone has stretch out flange and labyrinth packing conducting ring, just can make elasticity flow deflector 9 and labyrinth packing conducting ring 20 all keep excellent contact with guide ring 8 two-way, that is to say that fixedly the earth cable 1A in ground wire 11 and the ground wire storehouse assembly set 1 keeps good being electrically connected.
Claims (6)
1, a kind of eliminating secondary arc by floater conducting device comprises tank body (50), floating plate (60), fixing ground wire (11), it is characterized in that it also comprises: two supports (7) that are fixedly connected on tank body (50) top circumference; One is fixed on the fixed-bearing axis (5) on the support (7); One is wound with the ground wire storehouse assembly set (1) of earth cable (1A), and the inner of this earth cable (1A) is fixed on the ground wire storehouse assembly set (1), captives joint with floating plate in the outer end; One is located at the spring storehouse assembly set (2) of ground wire storehouse assembly set (1) one side; The static that is located at ground wire storehouse assembly set (1) another side is derived parts.
2, a kind of eliminating secondary arc by floater conducting device according to claim 1, it is characterized in that: the described ground wire storehouse assembly set (1) that is wound with earth cable (1A) also comprises can be around the ground wire storage warehouse (1B) of fixed-bearing axis (5) rotation, this ground wire storage warehouse (1B) but the middle part be provided with the inner bearing box portion (1C) of captive joint earth cable (1A), be provided with cylindrical bearing (3), (4) between bearing box portion (1C) and the fixed-bearing axis (5).
3, a kind of eliminating secondary arc by floater conducting device according to claim 1 is characterized in that: the described spring storehouse assembly set (2) that is located at ground wire storehouse assembly set (1) one side comprising: with ground wire storage warehouse (1B) affixed be one whole and can with its spring storage warehouse (2A) that rotates around fixed-bearing axis (5) synchronously; The middle part of this spring storage warehouse (2A) is provided with an axle sleeve (2B) that is fixed on the fixed-bearing axis (5), and its left end contacts with the right side of cylindrical bearing (4); Described axle sleeve (2B) and spring storage warehouse (2A) are rolled up the valiant energy stroage spring (2C) that has in the inner space that is constituted, and its head is fixed on the axle sleeve (2B), and its afterbody is fixed on the inwall of spring storage warehouse (2A).
4, a kind of eliminating secondary arc by floater conducting device according to claim 1 is characterized in that: described earth cable (1A) is a multiply soft copper silk braided wire.
5, a kind of eliminating secondary arc by floater conducting device according to claim 1 is characterized in that: described static is derived parts and is comprised: be fixed in the guide ring (8) on ground wire storehouse assembly set (1) left surface; The elasticity flow deflector (9) of one end and guide ring (8) moving contact and labyrinth packing conducting ring (20), all with fixedly ground wire (11) is affixed for this elasticity flow deflector (9) and labyrinth packing conducting ring (20), and its outer end is provided with and is screwed in fixed-bearing axis (5) and goes up peripheral zone and have the flow deflector of the flange that stretches out to tighten nut (10) and jam nut (12); This flow deflector tightens between the outward extending flange of periphery of nut (10) and the labyrinth packing conducting ring (20) and is provided with stage clip (21).
6, a kind of eliminating secondary arc by floater conducting device according to claim 5 is characterized in that: described elasticity flow deflector (9) is a 1-6 spare.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02282523 CN2573428Y (en) | 2002-10-14 | 2002-10-14 | Secondary arc eliminating 'on' device for floating-roof tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02282523 CN2573428Y (en) | 2002-10-14 | 2002-10-14 | Secondary arc eliminating 'on' device for floating-roof tank |
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| Publication Number | Publication Date |
|---|---|
| CN2573428Y true CN2573428Y (en) | 2003-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02282523 Expired - Lifetime CN2573428Y (en) | 2002-10-14 | 2002-10-14 | Secondary arc eliminating 'on' device for floating-roof tank |
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| CN (1) | CN2573428Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415066C (en) * | 2005-11-11 | 2008-08-27 | 中国石油化工股份有限公司 | Lightning protection anti electrostatic grounding device for crude oil floating top pot floating dish |
| CN102946682A (en) * | 2012-10-30 | 2013-02-27 | 西安信唯信息科技有限公司 | Static electricity eliminating method for floating element of telescopic hatch container |
| CN102991895A (en) * | 2012-10-30 | 2013-03-27 | 西安信唯信息科技有限公司 | Retractable hatch container and floating element equipotential connection system |
| CN108609304A (en) * | 2018-03-27 | 2018-10-02 | 江苏德大石化科技有限公司 | A kind of intrinsic safety explosion-proof lightning current current divider |
-
2002
- 2002-10-14 CN CN 02282523 patent/CN2573428Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415066C (en) * | 2005-11-11 | 2008-08-27 | 中国石油化工股份有限公司 | Lightning protection anti electrostatic grounding device for crude oil floating top pot floating dish |
| CN102946682A (en) * | 2012-10-30 | 2013-02-27 | 西安信唯信息科技有限公司 | Static electricity eliminating method for floating element of telescopic hatch container |
| CN102991895A (en) * | 2012-10-30 | 2013-03-27 | 西安信唯信息科技有限公司 | Retractable hatch container and floating element equipotential connection system |
| CN102991895B (en) * | 2012-10-30 | 2017-05-24 | 河北珠峰仪器仪表设备有限公司 | Retractable hatch container and floating element equipotential connection system |
| CN108609304A (en) * | 2018-03-27 | 2018-10-02 | 江苏德大石化科技有限公司 | A kind of intrinsic safety explosion-proof lightning current current divider |
| CN108609304B (en) * | 2018-03-27 | 2023-10-03 | 江苏德大石化科技有限公司 | Intrinsic safety explosion-proof lightning current shunt |
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