CN211109148U - Oil storage tank device - Google Patents
Oil storage tank device Download PDFInfo
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- CN211109148U CN211109148U CN201921946919.4U CN201921946919U CN211109148U CN 211109148 U CN211109148 U CN 211109148U CN 201921946919 U CN201921946919 U CN 201921946919U CN 211109148 U CN211109148 U CN 211109148U
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Abstract
The utility model provides an oil storage tank device, include: a direct current power supply; the buried oil storage tank comprises a metal layer, and the metal layer is communicated with the negative electrode of the direct current power supply; and the auxiliary anode structure is communicated with the anode of the direct-current power supply, and at least part of the auxiliary anode structure is arranged adjacent to the metal layer. The technical scheme of the utility model the oil storage tank among the prior art's anticorrosion effect is unsatisfactory effectively has been solved, and the oil storage tank that leads to can not the problem of long-term safe operation.
Description
Technical Field
The utility model relates to a technical field who anticorrosives particularly, relates to an oil storage tank device.
Background
With the rapid development of the automobile industry in China, the number of automobile gas stations is increasing day by day, and according to incomplete statistics, more than 10 ten thousand of the existing gas stations in China have more than 40 oil storage tanks in the gas stations in China, calculated according to the average 4 oil storage tanks of each gas station. The construction of these gas stations is initially limited by technological objective conditions, and most of the tank bodies are single-layer steel tanks, and adopt sand cushion foundations, concrete foundations or reinforced concrete foundations, and the outer walls of the steel tank bodies are extremely easy to corrode due to moisture and minerals in the soil. The corrosion of the tank body greatly shortens the service life of the storage tank, brings hidden danger to safety production, can cause the leakage of the finished oil more seriously, and once the finished oil is leaked, the rest parts except one part are removed or transferred through degradation, volatilization and the like and are retained in the natural environment for a long time, so that not only the soil and underground water resources which are relied on by human beings to live are seriously polluted, but also the health of the human beings is seriously threatened.
Once the leaked product oil meets the fire source, disastrous accidents such as personal injury and the like are likely to happen. According to survey, the oil leakage accident of the storage tank mostly occurs 7 years after operation, and 10-15 years later, the pitting frequency is increased continuously, and the average perforation rate reaches 14%. Along with the continuous enhancement of the consciousness of safety, energy conservation and environmental protection in China, the safety condition of the buried storage tank of the gas station is more and more emphasized.
At present, the anticorrosion measures of the steel outer wall of the buried oil storage tank of the gas station mainly adopt an outer anticorrosion layer or a combined protection mode of the outer anticorrosion layer and a sacrificial anode. The anticorrosive coating prevents corrosion by eliminating the isolation of the buried storage tank from the surrounding electrolyte solution; theoretically, if the anticorrosive coating is 100% intact, cathodic protection is not needed, but the anticorrosive coating inevitably causes defects of the anticorrosive coating in the links of prefabricating and leaving factory, intermediate transportation, field construction and the like, and a damage point is inevitably generated. The failure points of these corrosion protection layers inevitably undergo corrosion in the soil environment. Therefore, the steel outer wall of the buried storage tank cannot be protected for long-term corrosion resistance by singly adopting the anticorrosive coating for corrosion resistance.
The sacrificial anode protection method is a technique for providing direct current for cathodic protection by means of metal or alloy with stable and sufficiently negative electrode potential. The magnesium alloy sacrificial anode is suitable for a soil environment with soil resistivity of 50-100 omega-m, the urban soil resistivity is within the range of 50-300 omega-m, the magnesium alloy sacrificial anode is usually selected, and the main defects of the protection mode of the universal magnesium alloy sacrificial anode for protecting the steel outer wall of the buried oil storage tank comprise:
(1) the sacrificial anode has large self consumption, the consumption rate can reach 7.5 kg/(A.a), the service life is short, frequent replacement is needed, and the later maintenance cost is increased;
(2) the output current of the sacrificial anode is not adjustable, which can cause the phenomenon that the cathodic protection potential of the steel outer wall of the buried oil storage tank in the later stage is not enough: on one hand, as the outer anticorrosive coating of the steel outer wall of the buried oil storage tank ages year by year, the exposed area of the steel structure of the outer wall of the oil storage tank is gradually increased, and meanwhile, the required protection current is also increased; on the other hand, the magnitude of the current provided by the sacrificial anode depends on the potential difference between the selected sacrificial anode material and steel of the buried storage tank, the larger the potential difference is, the larger the current is, a non-conductive hard shell is generated on the surface of the sacrificial anode material in the service process, the current output of the anode is limited, and finally, the current required by the steel outer wall of the buried storage tank cannot be provided in the later operation.
(3) The more the number of the sacrificial anodes is better, the experience proves that the service life of the magnesium alloy sacrificial anodes in the soil is less than or equal to 5 years.
Therefore, the sacrificial anode has obvious limitation in the cathode protection of the buried oil storage tank, and the long-term safe operation requirement of the buried oil storage tank of the gas station is difficult to meet.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide an oil storage tank device to solve the problem that the oil storage tank in the prior art cannot be operated safely for a long time because the anti-corrosion effect is not ideal.
In order to achieve the above object, the utility model provides an oil storage tank device, include: a direct current power supply; the buried oil storage tank comprises a metal layer, and the metal layer is communicated with the negative electrode of the direct current power supply; and the auxiliary anode structure is communicated with the anode of the direct-current power supply, and at least part of the auxiliary anode structure is arranged adjacent to the metal layer.
Furthermore, the buried oil storage tank is of a multilayer structure, and the metal layer is located on the metal shell on the outermost side of the buried oil storage tank.
Further, the multilayer structure is two layers.
Further, the auxiliary anode structure includes an anode lead and an auxiliary anode, the anode lead is connected between the auxiliary anode and the direct current power supply, and the auxiliary anode is disposed adjacent to the metal layer.
Further, the auxiliary anode comprises a flexible anode; or the auxiliary anode comprises an MMO anode strip and a titanium conductive strip, and the MMO anode strip and the titanium conductive strip are positioned on the circumferential outer side of the buried oil storage tank; alternatively, the auxiliary anode comprises an MMO anode rod.
Furthermore, the auxiliary anode comprises an MMO anode strip and a titanium conductive strip, when the MMO anode strip and the titanium conductive strip are located on the circumferential outer side of the buried oil storage tank, the MMO anode strip is of a plurality of annular structures, and the titanium conductive strip is located on a plane perpendicular to the axis of the buried oil storage tank.
Furthermore, the buried oil storage tanks are multiple, and metal layers of the buried oil storage tanks are communicated through voltage-sharing cables.
Furthermore, the buried oil storage tank further comprises an explosion-proof junction box, the negative pole of the direct current power supply is connected with the metal layer of the buried oil storage tank through the explosion-proof junction box, and the positive pole of the direct current power supply is connected with the auxiliary anode through the explosion-proof junction box.
Furthermore, the oil storage tank device also comprises a reference electrode and a zero-position cathode connecting cable, wherein the first end of the zero-position cathode connecting cable is connected with a zero-position binding post of the direct-current power supply, the second end of the zero-position cathode connecting cable is connected with the metal layer, the first end of the reference electrode is connected with the reference binding post of the direct-current power supply, and the second end of the reference electrode is arranged adjacent to the metal layer.
Further, the oil storage tank device further comprises an explosion-proof test box and a test cable, the test reference electrode and the test reference electrode cable are used for testing, the first end of the test cable is connected with the terminal of the explosion-proof test box, the second end of the test cable is connected with the metal layer, the first end of the test reference electrode cable is connected with the terminal of the explosion-proof test box, the second end of the test reference electrode cable is connected with the test reference electrode, and the test reference electrode and the test cable are arranged adjacent to the metal layer connecting point.
Use the technical scheme of the utility model, DC power supply's negative pole is linked together with the metal level of burying the ground oil storage tank, and DC power supply's positive pole is linked together with supplementary positive pole structure, and supplementary positive pole structure sets up with the metal level is adjacent at least partly, DC power supply like this, bury ground and can form closed circuit between oil storage tank and the supplementary positive pole structure, and the corruption of burying the ground oil storage tank has been avoided effectively to above-mentioned structure. The technical scheme of the utility model the oil storage tank among the prior art's anticorrosion effect is unsatisfactory effectively has been solved, and the oil storage tank that leads to can not the problem of long-term safe operation.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic process structure diagram of a first embodiment of the oil storage tank device according to the present invention;
FIG. 2 is a schematic diagram showing the construction of an auxiliary anode structure of the oil tank arrangement of FIG. 1;
fig. 3 shows a schematic structural diagram of an auxiliary anode structure according to a second embodiment of the oil storage tank device of the present invention.
Wherein the figures include the following reference numerals:
10. a direct current power supply; 20. burying an oil storage tank; 30. an auxiliary anode structure; 31. an anode lead; 32. an auxiliary anode; 321. an MMO anode rod; 322. an MMO anode strip; 323. a titanium conductive tape; 40. a voltage-sharing cable; 50. an explosion-proof junction box; 60. a reference electrode; 70. the zero position is connected with the female cable; 80. an explosion-proof test box; 90. testing the cable; 100. a test reference electrode cable; 110. a reference electrode was used for testing.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
As shown in fig. 1 and 2, the oil storage tank device of the first embodiment includes: a dc power supply 10, a buried oil storage tank 20 and an auxiliary anode structure 30. The buried oil storage tank 20 includes a metal layer that is in communication with the negative pole of the dc power supply 10. The auxiliary anode structure 30 is in communication with the positive pole of the dc power supply 10, and the auxiliary anode structure 30 is at least partially disposed adjacent to the metal layer.
According to the technical scheme of the first application embodiment, the negative electrode of the direct current power supply 10 is communicated with the metal layer of the buried oil storage tank 20, the positive electrode of the direct current power supply 10 is communicated with the auxiliary anode structure 30, and the auxiliary anode structure 30 is at least partially arranged adjacent to the metal layer, so that a closed circuit can be formed among the direct current power supply 10, the buried oil storage tank 20 and the auxiliary anode structure 30, and the structure effectively avoids corrosion of the buried oil storage tank 20. The technical scheme of this embodiment has solved the not ideal effect of anticorrosion of the oil storage tank among the prior art effectively, and the oil storage tank that leads to can not the problem of long-term safe operation.
As shown in fig. 1 and 2, in the first technical solution of the embodiment, the buried oil storage tank 20 is a multi-layer structure, and a metal layer is located at the outermost metal casing of the buried oil storage tank 20. The structure of the metal shell makes the buried oil storage tank 20 have a firmer structure and stronger bearing capacity. The metal shell is made of steel material. Specifically, the multilayer structure is two layers. The pressure-bearing capacity of the buried oil storage tank 20 is guaranteed on the one hand, and on the other hand, the buried oil storage tank 20 is not prone to leakage.
As shown in fig. 1 and 2, in the solution of the present embodiment, the auxiliary anode structure 30 includes an anode lead 31 and an auxiliary anode 32, the anode lead 31 is connected between the auxiliary anode 32 and the dc power supply 10, and the auxiliary anode 32 is disposed adjacent to the metal layer. The structure is convenient to set and low in processing cost. Specifically, the distance between the auxiliary anode 32 and the outer wall of the metal layer is greater than or equal to 300 mm.
As shown in fig. 1 and 2, in the solution of the present embodiment, the auxiliary anode 32 includes an MMO anode strip 322 and a titanium conductive strip 323, and the MMO anode strip 322 and the titanium conductive strip 323 are located on the circumferential outer side of the buried oil storage tank 20. The above structure makes the oil storage tank device easily form a closed circuit, thereby ensuring that the buried oil storage tank 20 is not easily corroded. The closed loop is as follows: a dc power supply 10, an auxiliary anode structure 30, soil, a buried oil storage tank 20 and then a dc power supply 10.
In the solution of this embodiment, the MMO anode strips 322 are in a plurality of loop configurations, as shown in fig. 1 and 2, and the titanium conductive strips 323 are located in a plane perpendicular to the axis of the buried oil storage tank 20. The auxiliary anode 32 with the structure has better conductivity and longer service cycle. The auxiliary anode 32 is laid around the outer wall of the steel metal layer of the buried oil storage tank 20, the distance between the auxiliary anode 32 and the steel outer wall of the buried oil storage tank 20 is more than or equal to 300mm, and the distance between the auxiliary anode 32 and the steel outer wall of the buried oil storage tank 20 is within the range of 0.02 m-5 m. The anode cable (anode wire 31) laid by each buried oil storage tank 20 is connected into an explosion-proof junction box 50. The planes of the plurality of annular structures are parallel to the axis of the buried oil storage tank 20, and the titanium conductive band 323 can be semicircular, circular, arc-shaped, or curved.
As shown in fig. 1 and 2, in the first technical solution of the embodiment, there are a plurality of buried oil storage tanks 20, and the metal layers of the plurality of buried oil storage tanks 20 are communicated with each other through a voltage equalizing cable 40. The steel outer walls of all the buried oil storage tanks 20 in the gas station are electrically connected through the voltage-sharing cable 40 so as to ensure that the steel outer walls of all the buried oil storage tanks 20 are equipotential. The direct current power supply 10 and the explosion-proof junction box 50 are located at appropriate positions above the ground. The control reference electrode cable and the zero position cathode connecting cable 70 are respectively connected with corresponding terminals of the direct current power supply 10 through the explosion-proof junction box 50.
As shown in fig. 1 and fig. 2, in the solution of this embodiment, the buried oil storage tank 20 further includes an explosion-proof junction box 50, the negative pole of the dc power supply 10 is connected to the metal layer of the buried oil storage tank 20 through the explosion-proof junction box 50, and the positive pole of the dc power supply 10 is connected to the auxiliary anode 32 through the explosion-proof junction box 50. The provision of the explosion-proof junction box 50 ensures the safety of the oil storage tank arrangement. The oil storage tank device is used for storing and transporting inflammable and explosive oil substances such as gasoline, diesel oil and the like, and the explosion-proof junction box 50 can effectively reduce the occurrence of the dangers such as the inflammable and explosive and the like.
As shown in fig. 1, in the solution of the first embodiment, the oil storage tank device further includes a reference electrode 60 and a zero-position cathode cable 70, a first end of the zero-position cathode cable 70 is connected to the zero-position post of the dc power supply 10, a second end of the zero-position cathode cable 70 is connected to the metal layer, a first end of the reference electrode 60 is connected to the reference post of the dc power supply 10, and a second end of the reference electrode 60 is disposed adjacent to the metal layer. The above structure ensures that the dc power supply 10 can adjust the supply current or voltage of the dc power supply 10 according to the measurement results of the reference electrode 60 and the zero-position cathode cable 70, and that the user can visually observe whether the current or voltage of the oil storage tank device is within a proper range.
As shown in fig. 1, in the first technical solution of the embodiment, the oil tank device further includes an explosion-proof test box 80, a test cable 90, a test reference electrode cable 100 and a test reference electrode 110, a first end of the test cable 90 is connected to a terminal of the explosion-proof test box 80, a second end of the test cable 90 is connected to a metal layer, a first end of the test reference electrode cable 100 is connected to the terminal of the explosion-proof test box 80, a second end of the test reference electrode cable 100 is connected to the test reference electrode 110, and the test reference electrode 110 and a connection point of the test cable 90 and the metal layer are disposed adjacent to each other. The protection potential of the buried oil storage tank is detected by the explosion-proof test box, so that the potential of a steel outer wall detection point of the protected buried oil storage tank meets the requirements of-850 mV (CSE) to-1200 mV (CSE).
As shown in fig. 3, the difference between the solution of the second embodiment and the first embodiment is that the auxiliary anode 32 is an MMO anode rod 321. Mixed metal oxide, the MMO anode rod 321 is plural, and the plural MMO anode rods 321 are distributed outside the buried oil storage tank 20. The structure has lower processing cost. As other practical examples, the auxiliary anode 32 may also include a flexible anode, which may be an MMO/Ti anode or a conductive polymer anode, etc.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An oil storage tank apparatus, comprising:
a DC power supply (10);
the buried oil storage tank (20), wherein the buried oil storage tank (20) comprises a metal layer, and the metal layer is communicated with the negative electrode of the direct current power supply (10);
an auxiliary anode structure (30), the auxiliary anode structure (30) being in communication with a positive electrode of the DC power source (10), and the auxiliary anode structure (30) being at least partially disposed adjacent to the metal layer.
2. Storage tank installation according to claim 1, characterized in that the buried storage tank (20) is of a multi-layered construction, the metal layer being located on the outermost metal casing of the buried storage tank (20).
3. The storage tank apparatus of claim 2, wherein said multi-layered structure is two-layered.
4. -oil reservoir device according to any one of claims 1 to 3, characterised in that the auxiliary anode structure (30) comprises an anode lead (31) and an auxiliary anode (32), the anode lead (31) being connected between the auxiliary anode (32) and the direct current source (10), the auxiliary anode (32) being arranged adjacent to the metallic layer.
5. The tank arrangement according to claim 4, characterized in that the auxiliary anode (32) comprises a flexible anode; alternatively, the auxiliary anode (32) comprises an MMO anode strap (322) and a titanium conductive strap (323), the MMO anode strap (322) and the titanium conductive strap (323) being located circumferentially outside the buried oil storage tank (20); alternatively, the auxiliary anode (32) comprises an MMO anode rod (321).
6. The oil storage tank arrangement of claim 5, characterized in that the auxiliary anode (32) comprises MMO anode strips (322) and titanium conductive strips (323), the MMO anode strips (322) being a plurality of loop structures when the MMO anode strips (322) and the titanium conductive strips (323) are located circumferentially outside the buried oil storage tank (20), the titanium conductive strips (323) being located on a plane perpendicular to the axis of the buried oil storage tank (20).
7. The storage tank arrangement according to claim 4, characterized in that the buried storage tanks (20) are plural, and the metal layers of the plural buried storage tanks (20) are connected to each other by a voltage equalizing cable (40).
8. The tank arrangement according to claim 4, characterized in that the buried oil tank (20) further comprises an explosion-proof junction box (50), the negative pole of the DC power supply (10) being connected to the metal layer of the buried oil tank (20) through the explosion-proof junction box (50), and the positive pole of the DC power supply (10) being connected to the auxiliary anode (32) through the explosion-proof junction box (50).
9. The storage tank arrangement of claim 1, further comprising a reference electrode (60) and a zero-position cathode cable (70), wherein a first end of the zero-position cathode cable (70) is connected to a zero-position post of the dc power supply (10), a second end of the zero-position cathode cable (70) is connected to the metal layer, a first end of the reference electrode (60) is connected to the reference post of the dc power supply (10), and a second end of the reference electrode (60) is disposed adjacent to the metal layer.
10. The oil tank device according to claim 1, further comprising an explosion-proof test tank (80), a test cable (90), a test reference electrode cable (100), and a test reference electrode (110), wherein a first end of the test cable (90) is connected to a terminal of the explosion-proof test tank (80), a second end of the test cable (90) is connected to the metal layer, a first end of the test reference electrode cable (100) is connected to the terminal of the explosion-proof test tank (80), a second end of the test reference electrode cable (100) is connected to the test reference electrode (110), and the test reference electrode (110) and the test cable (90) are disposed adjacent to a connection point of the metal layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921946919.4U CN211109148U (en) | 2019-11-12 | 2019-11-12 | Oil storage tank device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921946919.4U CN211109148U (en) | 2019-11-12 | 2019-11-12 | Oil storage tank device |
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| CN211109148U true CN211109148U (en) | 2020-07-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111850570A (en) * | 2020-07-29 | 2020-10-30 | 山东京博石油化工有限公司 | Earthing liquefied hydrocarbon storage tank cathodic protection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111850570A (en) * | 2020-07-29 | 2020-10-30 | 山东京博石油化工有限公司 | Earthing liquefied hydrocarbon storage tank cathodic protection system |
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