CN209948334U

CN209948334U - Lightning protection device for storage tank

Info

Publication number: CN209948334U
Application number: CN201921151274.5U
Authority: CN
Inventors: 周明辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-01-14
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a lightning protection device for a storage tank, which belongs to the technical field of petrochemical equipment, and comprises a lightning rod, a conducting strip, a conducting wire, a guiding component and a counterweight with the weight lower than that of a floating roof, wherein the lightning rod is arranged at the top of the storage tank made of metal materials and is connected with a grounding component through a lead; the plurality of conducting strips are arranged around the floating roof at intervals, one end of each conducting strip is connected with the floating roof through a pressing piece, and the other end of each conducting strip is abutted against the wall of the storage tank; the guide component is arranged at the top of the storage tank, the counterweight is arranged outside the storage tank, one end of the lead is connected with the counterweight, and the other end of the lead penetrates through the top of the storage tank and is connected with the floating roof of the storage tank by bypassing the guide component; the lead is arranged in the heat insulation layer outside the storage tank. Lightning can be conveniently diffused to the grounding component through the lightning rod and the lead, and the storage tank is prevented from being broken down by the lightning; the tail end of the conducting wire connected with the floating roof is fixed with the balance weight, so that the conducting wire is ensured to be contacted with the top of the storage tank, and meanwhile, the conducting strips on the periphery of the floating roof are tightly abutted with the tank wall, so that spark discharge between the floating roof and the tank wall in the lightning diffusion process can be avoided.

Description

Lightning protection device for storage tank

Technical Field

The utility model belongs to the technical field of petrochemical equipment, especially, relate to a storage tank lightning protection device.

Background

According to the design fire-proof standard requirements of petrochemical enterprises, steel tanks for combustible gas, liquefied hydrocarbon and combustible liquid arranged in the open air need to be provided with mine-proof grounding facilities. Because the floating roof in the storage tank can frequently lift relative to the tank wall in the use process, the gap between the floating roof and the tank wall is small, sparks are easily generated, and a sealing member is ignited, so that a fire hazard is caused. At present, this type of storage tank all adopts the conducting strip to carry out the lightning protection, but large-scale floating roof storage tank receives the floating roof to rotate, the imperfect influence of sealing device, and inflammable gas easily gathers in the sealing washer, though adopt the conducting strip, can only follow the inside spark of eliminating lightning current release in-process and produce, and can't avoid storage tank in the thunderbolt from the outside, still exists very big potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a storage tank lightning protection device aims at solving among the above-mentioned prior art floating roof and the technical problem that there is the potential safety hazard in the storage tank jar wall appearance clearance.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a lightning protection device for a storage tank comprises a lightning rod, a conducting strip, a conducting wire, a guide component and a balance weight with the weight lower than that of a floating roof, wherein the lightning rod is arranged at the top of the storage tank made of a metal material and is connected with a grounding component through a lead; the device comprises a floating roof, a plurality of conducting strips, a pressing piece and a pressing piece, wherein the conducting strips are arranged at the periphery of the floating roof at intervals, and one ends of the conducting strips are connected with the floating roof through the pressing piece and used for tightly abutting the other ends of the conducting strips with the wall of the storage tank; the guide component is arranged at the top of the storage tank, the counterweight is arranged outside the storage tank, one end of the lead is connected with the counterweight, and the other end of the lead penetrates through the top of the storage tank and is connected with the floating roof of the storage tank by bypassing the guide component; the outside of storage tank is equipped with the heat preservation, the lead wire sets up in the heat preservation.

Preferably, the lead is connected with an escalator on the outer wall of the storage tank, the escalator is made of metal, and the lower end of the escalator is connected with the grounding component.

Preferably, the grounding part comprises a plurality of grounding electrodes buried underground, the grounding electrodes are metal containers filled with electrolyte, the grounding electrodes are hollow shells provided with a plurality of small holes, and the grounding electrodes are connected in series or in parallel by conductors.

Preferably, the compressing part is a torsion spring, and the lower end of the conducting strip is connected with the floating roof through the torsion spring and used for pressing the upper end of the conducting strip on the tank wall.

Preferably, the upper part of the conducting strip is provided with a vertical part which is in contact with the tank wall, and the tail end of the vertical part of the conducting strip is provided with a bend facing the inner side of the storage tank.

Preferably, the guide part is two guide wheels fixed on the top of the storage tank, one guide wheel is arranged on the edge of the top of the storage tank, and the other guide wheel is arranged on the top of the storage tank.

Preferably, the outer side of the counterweight is provided with a vertical protective cover, and the protective cover is arranged on the outer wall of the storage tank.

Preferably, the top of the storage tank is provided with a via hole matched with the lead, the inner wall of the via hole is provided with a sleeve made of beryllium copper, and the sleeve is filled with activated carbon.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the lightning rod of the utility model facilitates the lightning to diffuse to the grounding part through the lead wire, thereby avoiding the storage tank from being punctured by the lightning; and a balance weight is fixed at the tail end of the wire connected with the floating roof, so that the wire is ensured to be contacted with the top of the storage tank made of metal materials, and meanwhile, the floating roof conducting strip is electrically connected with the floating roof in the storage tank, so that spark discharge between the floating roof and the tank wall in the lightning diffusion process can be avoided.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is an application state diagram of a lightning protection device for a storage tank according to an embodiment of the present invention;

fig. 2 is an enlarged view of the conductive sheet of fig. 1;

FIG. 3 is a schematic diagram of the structure of the grounding member of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 1 at A;

in the figure: 00-a storage tank; 01-heat insulation layer; 1-a lightning rod; 2-a conductive sheet; 20-vertical part, 21-bending; 3-a wire; 4-a guide member; 5-floating the roof; 6-counterweight; 7-a lead; 8-ground, 80-ground, 81-electrolyte, 82-pore, 83-conductor; 9-an escalator; 10-a ground grid; 11-torsion spring; 12-a protective cover; 13-a sleeve; 14-activated carbon; 15-a breather valve.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the lightning protection device for the storage tank comprises a lightning rod 1, a conducting strip 2, a conducting wire 3, a guiding component 4 and a counterweight 6 with the weight lower than that of a floating roof 5, wherein the lightning rod 1 is arranged at the top of a metal storage tank 00, and the lightning rod 1 is connected with a grounding component 8 through a lead 7; the number of the conducting strips 2 is multiple, the conducting strips are arranged around the floating roof 5 at intervals, and one end of each conducting strip 2 is connected with the floating roof 5 through a pressing piece and used for enabling the other end of each conducting strip 2 to be tightly abutted against the tank wall of the storage tank 00; the guide part 4 is arranged at the top of the storage tank 00, the counterweight 6 is arranged outside the storage tank 00, one end of the lead 3 is connected with the counterweight 6, and the other end of the lead penetrates through the top of the storage tank 00 and is connected with the floating roof 5 of the storage tank 00 by bypassing the guide part 4; the outside of storage tank 00 is equipped with heat preservation 01, lead wire 7 sets up in heat preservation 01. Meanwhile, a breather valve is arranged at the top of the storage tank, and the internal and external pressures of the storage tank are ensured to be balanced through the breather valve. Because most large-scale storage tanks are located outdoors, the storage tanks can be insulated by the heat-insulating layer, and the potential safety hazard caused by the rise of the exposure temperature for a long time in summer is avoided. In thunderstorm weather, the lightning current firstly goes down through the lightning rod and the lead wire, and finally is led into the ground through the grounding component to finish the discharge. The balance weight is utilized to ensure that the wire is in a stretched state, so that the impedance of the wire is reduced, and the good lightning protection performance is ensured; the conducting strip is ensured to be tightly attached to the wall of the storage tank by the aid of the pressing piece, and probability of spark discharge between the floating roof and the tank wall in a lightning current discharge process is reduced.

For a storage tank with a large volume, an escalator is usually arranged outside the storage tank, the lead 7 can be connected with the escalator 9 on the outer wall of the storage tank 00, the escalator 9 is made of metal, and the lower end of the escalator 9 is connected with the grounding component 8. The lightning rod transmits the lightning current to the grounding component through the lead and the escalator.

As a preferred structure, as shown in fig. 3, the grounding member 8 includes a plurality of grounding electrodes 80 buried underground, the grounding electrodes 80 are metal containers filled with electrolytes 81, the grounding electrodes 80 are hollow shells provided with a plurality of small holes 82, and the plurality of grounding electrodes 80 are connected in series or in parallel by conductors 83. When the electrolyte in the metal container is buried underground, the electrolyte can absorb the moisture in the soil, can slowly release the electrolyte and increase the conductive capacity. The grounding electrode is particularly suitable for areas with less soil or drought, the electrolyte can permeate into the deep soil to form a good conductive channel, and the conductivity of the grounding electrode is higher than that of a pure metal plate or a metal rod. To further improve safety, the earth electrode 80 may be connected to an earth grid 10 buried deep in the ground, as shown in fig. 1.

In a preferred embodiment of the present invention, as shown in fig. 2, the compressing member is a torsion spring 11, and the lower end of the conducting strip 2 is connected to the floating roof 5 through the torsion spring 11 for pressing the upper end of the conducting strip 2 on the tank wall. The upper part of the conducting strip 2 is provided with a vertical part 20 which is in contact with the tank wall, and the tail end of the vertical part 20 of the conducting strip 2 is provided with a bend 21 which faces the inner side of the storage tank 00. The floating roof is in sealing fit with the wall of the storage tank, the contact area between the conducting strip and the wall of the storage tank is increased by the aid of the vertical part, the probability of spark discharge of the conducting strip in the lightning current discharging process is greatly reduced, fire accidents caused by lightning stroke of the storage tank are eliminated by the conducting strip, and safe operation of the storage tank is guaranteed.

As shown in fig. 1 and 4, the guiding member 4 is two guiding wheels fixed on the top of the storage tank 00, one guiding wheel is disposed on the top edge of the storage tank 00, and the other guiding wheel is disposed on the top of the storage tank 00. The wire extends to the outside of the storage tank along the two guide wheels, and through the connection of the wire and the floating roof, the electric lightning stroke between the floating roof and the tank wall is provided, so that the reliable equipotential connection is realized, the instantaneous voltage drop of the floating roof is reduced in magnitude, a low-impedance channel is provided for discharging lightning charges and static charges, the skin effect under the lightning current frequency is reduced, the possibility of electric spark generation is reduced to the minimum, and the ignition accident of the floating roof storage tank caused by lightning stroke flashover is greatly reduced. The balance weight is utilized to straighten the wire, the impedance of the wire is reduced, the good lightning protection performance is ensured, and the conductive silicone grease is coated on the connecting parts of the wire and the floating roof, the guide wheel and the storage tank, so that the impedance of the conductor is effectively reduced, and the lightning current is rapidly led into the ground.

Further optimizing the technical scheme, as shown in fig. 1, a vertical protective cover 12 is arranged on the outer side of the counterweight 6, and the protective cover 12 is arranged on the outer wall of the storage tank 00. Because the weight of counter weight is lighter relatively, in order to avoid the wind to shake, can set up the counter weight in the guard shield, ensure its ascending and descending in the vertical direction.

In a specific embodiment of the present invention, as shown in fig. 4, a via hole matched with the wire 3 is arranged at the top of the storage tank 00, a casing 13 made of beryllium copper is arranged on the inner wall of the via hole, the beryllium copper has good conductivity and wear resistance, it is ensured that the wire has good conductivity in the sliding process along the casing, and the service life of the casing can be prolonged; the sleeve 13 is filled with activated carbon 14, which can adsorb volatile liquid in the storage tank.

In summary, the utility model has the advantages of simple structure and good lightning protection effect, and can ensure that the storage tank located outdoors has no hidden danger, and in thunderstorm weather, the lightning current firstly goes down through the lightning rod and the lead wire, and finally is guided into the ground through the grounding part to complete the discharge; meanwhile, the balance weight is used for ensuring that the conducting wire is in a stretched state, the impedance of the conducting wire is reduced, the conducting plate is ensured to be tightly attached to the wall of the storage tank by means of the pressing piece, and the probability of spark discharge between the floating roof and the tank wall in the lightning current discharge process is reduced. Utilize the utility model discloses can further strengthen the security performance of storage tank.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the one described herein, and those skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed above.

Claims

1. A storage tank lightning protection device which characterized in that: the lightning rod is arranged at the top of the metal storage tank and is connected with the grounding component through a lead; the device comprises a floating roof, a plurality of conducting strips, a pressing piece and a pressing piece, wherein the conducting strips are arranged at the periphery of the floating roof at intervals, and one ends of the conducting strips are connected with the floating roof through the pressing piece and used for tightly abutting the other ends of the conducting strips with the wall of the storage tank; the guide part is arranged at the top of the storage tank, the counterweight is arranged outside the storage tank, one end of the lead is connected with the counterweight, and the other end of the lead penetrates through the top of the storage tank and is connected with the floating roof of the storage tank by bypassing the guide part; the outside of storage tank is equipped with the heat preservation, the lead wire sets up in the heat preservation.

2. The lightning protection device for a storage tank according to claim 1, wherein: the lead wire is connected with an escalator on the outer wall of the storage tank, the escalator is made of metal, and the lower end of the escalator is connected with the grounding component.

3. The lightning protection device for a storage tank according to claim 1, wherein: the grounding part comprises a plurality of grounding electrodes buried underground, the grounding electrodes are metal containers filled with electrolytes, the grounding electrodes are hollow shells provided with a plurality of small holes, and the grounding electrodes are connected in series or in parallel by conductors.

4. The lightning protection device for a storage tank according to claim 1, wherein: the compressing part is a torsion spring, and the lower end of the conducting strip is connected with the floating roof through the torsion spring and used for pressing the upper end of the conducting strip on the tank wall.

5. The lightning protection device for a storage tank according to claim 1, wherein: the upper portion of the conducting strip is provided with a vertical portion in contact with the tank wall, and the tail end of the vertical portion of the conducting strip is provided with a bend facing the inner side of the storage tank.

6. The lightning protection device for a storage tank according to claim 1, wherein: the guide part is two leading wheels that are fixed in the storage tank top, and a leading wheel sets up in the top edge of storage tank, and another leading wheel sets up in the top of storage tank.

7. The lightning protection device for a storage tank according to claim 1, wherein: the outside of counter weight is equipped with perpendicular safety cover, the safety cover sets up on the outer wall of storage tank.

8. The lightning protection device for storage tanks according to any one of claims 1 to 7, characterized in that: the storage tank is characterized in that a through hole matched with the lead is formed in the top of the storage tank, a sleeve made of beryllium copper is arranged on the inner wall of the through hole, and activated carbon is filled in the sleeve.