HK1125350B - Safety environmental-protection buried oil tank - Google Patents

Description

Safety environment-friendly buried oil storage tank

Technical Field

The invention relates to an oil storage tank, in particular to a safe and environment-friendly buried oil storage tank which can effectively prevent oil from overflowing and prevent the tank wall from leaking or leaking and belongs to the technical field of storage safety of buried oil storage containers.

Background

Most of storage tanks of an oil (gas) filling station in the prior art are buried underground, the buried oil storage tanks are arranged in underground tank ponds, the tank ponds are generally concrete tanks, cavities between the tank ponds and a tank body are filled with neutral fine sand or sand bags, the covering thickness of a tank top is required to be not less than 0.5 m, and the filling thickness of the periphery of the tank body is not less than 0.9 m. The purpose of filling sandy soil in the tank pond is to ensure that air does not exist between the tank pond and the tank body, so that the oil and gas cannot be mixed to form a combustion and explosion space, and the tank pond has an explosion-proof effect. When the storage tank is filled with oil, the overflowed gasoline can be absorbed by sandy soil due to the phenomena of overflow, roof fall and the like caused by operation errors; because the sand consumption is great in the construction of the buried storage tank, the engineering difficulty is high, some gas stations are not constructed according to the specifications, only some sand is filled at the bottom of the tank pool, and even more, the sand is not filled in the tank pool, so that the hidden danger caused by the sand filling is very serious. In addition, the tank wall has seepage or leakage in the use process, and the sinking of the foundation of the tank pool and other reasons cause the crack of the waterproof layer at the bottom of the tank pool, and the medium in the tank easily penetrates through the tank wall to cause irreparable harm to the soil and underground water resources around the tank body. In addition, the existing underground oil storage tank is provided with a single-wall tank, and the purpose of adopting a double-wall tank in the existing underground oil storage tank mainly plays roles of collision prevention and heat insulation. That is to say, the technical defect of the structure of the existing oil storage tank is that the phenomena of overflow, roof collapse and the like of oil filling and the problem of leakage or leakage of the wall of the oil storage tank cannot be found and treated in time, and great potential safety hazards exist.

The buried oil storage tank of the invention is provided with a vertical shaft and a decontamination tunnel, and is filled with a blocking explosion-proof material, and the contents are disclosed in the prior patent application of the applicant, such as: chinese patent ZL01144635.8, application No. 200510067976.1, 200510066233.2, the disclosure of which is incorporated herein by reference.

Disclosure of Invention

One of the technical problems to be solved by the present invention is to provide a safe and environment-friendly buried oil storage tank, which can prevent accidental combustion and explosion accidents caused by open fire, static electricity, welding, gunshot, collision, misoperation, etc. and ensure the safety of the oil storage tank, because the oil storage tank is internally provided with a blocking explosion-proof material.

The second technical problem to be solved by the present invention is to provide a safe and environment-friendly buried oil storage tank, which is a double-wall tank structure, and can effectively overcome the leakage of oil and gas, and avoid the serious damage to the soil around the gas station and the damage to underground water resources; an oil leakage detection device is arranged in the double-wall tank cavity, so that the volatilization of oil and gas can be detected, and the oil-carrying repair welding on the tank wall can be found and repaired in time; meanwhile, the oil overflow pool is arranged at the manhole of the tank body, so that oil overflow, roof fall and other phenomena can be prevented during oil injection, and once the phenomena are found, precautionary measures are taken in time.

The above problems solved by the present invention are realized by the following technical solutions:

a safe and environment-friendly buried oil storage tank is characterized in that a tank body adopts a double-layer structure of an inner tank wall and an outer tank wall, an interlayer is formed between the inner tank wall and the outer tank wall, separation explosion-proof materials are respectively filled in the interlayer formed by an inner cavity of the tank body and the double-layer tank wall, an oil leakage detection device is arranged in the interlayer of the double-layer tank wall, an oil overflow pool is arranged at a manhole cover of the tank body, and the bottom of the oil overflow pool is communicated with the interlayer of the double-layer tank wall.

In order to facilitate maintenance and decontamination, a vertical shaft is arranged in the tank body, the top end of the vertical shaft is arranged at a position corresponding to the manhole cover on the tank body, the vertical shaft is a frame which vertically penetrates through the tank body along the radial direction, an upper arc-shaped end plate and a lower arc-shaped end plate are respectively arranged at two ends of the frame, more than one inner container is arranged in the frame, and a blocking explosion-proof material is filled in each inner container. The bottom of the inner cavity of the tank body is provided with a decontamination tunnel, the decontamination tunnel is formed by enclosing a semicircular metal net and a supporting framework arranged at the lower part of the semicircular metal net, two end parts of the decontamination tunnel are tightly propped against the inner side of the inner tank wall, and the metal net is further covered with a layer of filter screen. Generally, the structures of the inner cavity of the tank body and the barrier explosion-proof material filled in the interlayer are different. The separation explosion-proof material filled in the inner cavity of the tank body is a separation explosion-proof material unit body, the separation explosion-proof material unit body comprises a second frame formed by surrounding angle steel, a protective net woven by steel wires is arranged outside the second frame, and a sheet-shaped mesh material or a spherical material with a high pore structure is filled in the second frame. The separation explosion-proof material filled in the interlayer of the double-layer tank wall is a flaky mesh material with a high-porosity structure, and multiple layers of the separation explosion-proof material are wound on the outer side of the inner tank wall and are filled with interlayer space. According to different use requirements, the frame shape of the blocking explosion-proof material unit body can be a cube, a cuboid, a triangular prism, a cylinder or an irregular shape. In order to better prevent the oil storage tank from being subjected to oil spilling, roof collapse and other phenomena in the oil filling process to be monitored and processed in time, an oil leakage detection device is arranged in the oil spilling tank and is connected with a signal conversion controller or a power amplification controller and an alarm.

In conclusion, the beneficial effects of the invention are as follows:

1. because the oil storage tank is internally provided with the blocking explosion-proof material, accidental combustion and explosion accidents caused by open fire, static electricity, welding, gunshot, collision, misoperation and the like can be prevented, and the intrinsic safety of the oil storage tank is ensured;

2. the oil storage tank is of a double-wall tank structure, so that leakage and leakage of oil and gas can be effectively overcome, and serious damage to soil around a gas station and damage to underground water resources are avoided;

3. an oil leakage detection device is arranged in the double-wall tank cavity, so that the volatilization of oil-gas mixed gas can be detected, and the oil-carrying repair welding on the tank wall can be found and repaired in time;

4. the oil overflow pool arranged at the manhole of the tank body can prevent oil overflow, roof fall and other phenomena during oil injection, and once the phenomena are found, precautionary measures are taken in time.

The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present invention;

3-5 are schematic structural views of the barrier explosion-proof material unit of the invention;

FIG. 6 is a schematic structural diagram of the explosion-proof barrier material unit filled in the storage tank;

FIG. 7 is a schematic view of a partial structure of the oil overflow tank of the present invention;

FIG. 8 is a schematic view of the structure of the connecting rib on the inner wall of the oil storage tank according to the present invention;

fig. 9 is a schematic view of the internal structure of the tank body provided with the compartment plate according to the present invention.

The main reference numerals are explained below:

1 inner tank wall 12 and outer tank wall 121 connecting rib 13 interlayer 14 manhole cover of tank 11

2 detection device 21 signal conversion or power amplification controller 22 alarm connection 23 probe

3 blocking explosion-proof material 31, 31 ' blocking explosion-proof material unit body 311, second frame 311 ', cuboid frame 311 ' triangular prism frame 312, filler 32 cross-shaped fixing piece

4 rain-proof apron of 41 oil leak hole 42 in oil spilling pond

5 shaft

6 tunnel 61 protection network of decontaminating

7 anticorrosive coating, 8 heat-insulating layer, 9 oil-discharging valve and 10 compartment plate

Detailed Description

Example one

Fig. 1 is a schematic view of the overall structure of the present invention. As can be seen from fig. 1, the invention provides a safe and environment-friendly buried oil storage tank, wherein a tank body 1 adopts a double-layer structure of an inner tank wall 11 and an outer tank wall 12, an interlayer 13 is formed between the inner tank wall and the outer tank wall, and the structures of an inner cavity of the tank body 1 and a blocking explosion-proof material 3 filled in the interlayer 13 are different under normal conditions. The separation explosion-proof material 3 filled in the inner cavity of the tank body 1 is a separation explosion-proof unit body 31, the separation explosion-proof material 3 filled in the interlayer 13 is a sheet material with a high pore structure, and multiple layers of the separation explosion-proof material are wound on the outer wall of the inner tank body and are filled in the space of the interlayer 13. Fig. 2 is a partially enlarged view of a portion a of fig. 1 according to the present invention. As can be seen from fig. 2, the oil leakage detection device 2 is arranged in the interlayer 13 of the double-layer tank, the detection device 2 is connected with the signal conversion or power amplification controller 21 and the alarm 22, the probe 23 of the detection device 2 extends into the interlayer 13, once the tank body leaks or leaks, the leaked oil vapor is rapidly emitted into the interlayer 13 of the double-layer tank wall, and the probe 23 of the detection device 2 can detect the expansionThe alarm 22 is sent to alarm 22 through the conversion or power amplification controller 21 to give an alarm, so that the repair welding can be found and carried out in time, and the damage to the surrounding soil of the gas station and the pollution to underground water resources can be avoided. In general, in practical applications, the detecting device 2 may be a commercial XP-314 flammable gas detector, which is a gas heat conduction type and can be used for artificial gas, natural gas, CH₄，H₂，He，CO₂Etc., and the detection range is 0-100 vol%. As shown in fig. 1, the inner cavity of the tank body 1 is filled with the explosion-proof barrier material 3, an oil overflow tank 4 is arranged at a manhole cover 14 of the tank body 1, and the bottom of the oil overflow tank 4 is communicated with the interlayer 13. In order to make the safety and explosion-proof performance of the oil storage tank higher.

As shown in fig. 1, in order to facilitate the maintenance and decontamination of the oil storage tank, a vertical shaft 5 is arranged in the tank body 1, the structure of the vertical shaft 5 is described in the invention patent with chinese patent No. ZL01144635.8 and invention name "barrier and explosion-proof underground oil storage tank capable of cleaning and maintaining", the top end of the vertical shaft 5 is arranged at the corresponding position of the manhole cover 14 on the tank body 1, the vertical shaft 5 is a frame which vertically penetrates through the tank body 1 along the radial direction, the two ends of the vertical shaft are respectively provided with an upper arc-shaped end plate and a lower arc-shaped end plate (not shown in the figure), more than one inner container is arranged in the frame of the vertical shaft 5, the inner container is filled with sheet barrier and explosion-proof materials or spherical bodies, meanwhile, a decontamination tunnel 6 is arranged at the bottom of the inner cavity of the tank body 1, as described in the invention patent No. ZL01144635.8 and invention name "barrier and explosion-proof underground oil storage tank capable of cleaning and maintaining", the decontamination tunnel 6 is enclosed by, the two ends of the cleaning tunnel 6 are tightly propped against the inner wall of the tank body 1, and a layer of filter screen 61 is covered on the metal net.

In the practical application process, the structures of the blocking explosion-proof materials 3 filled in the interlayer 13 and the inner cavity of the tank body 1 are different; the barrier explosion-proof material 3 filled in the tank body 1 is composed of more than one barrier explosion-proof material unit body 31. In this regard, reference may be made to the invention patent application No. 200510067976.1 entitled "barrier blast proof material", or to the invention patent application No. 200510066233.2 entitled "barrier blast proof material unit body". Fig. 3-5 are schematic structural diagrams of the barrier explosion-proof material unit according to the present invention. Taking fig. 3 as an example, the explosion-proof barrier material unit 31 includes a second frame 311 formed by enclosing angle steel, and a protective net 3111 woven by steel wires is arranged outside the second frame 311 to prevent the debris of the protective material from mixing in the medium. The frame 311 is filled with a mesh material 312 (or a spheroid material) with a sheet-shaped high-porosity structure, and the mesh material 312 is made of a special metal foil material by a net puller into a mesh structure or a spheroid (the spheroid is made by reprocessing the sheet-shaped material). In the second frame 311, the filling of the pores of the mesh material 312 may be performed in a manner of gradually decreasing from top to bottom. As shown in fig. 4 and 5, the second frame 311 of the barrier explosion-proof material unit 31 may take various shapes to match different positions actually filled in the oil storage tank, and the shape thereof may be selected differently. For example, the second frame 311 may be a square as shown in fig. 3, a rectangular frame 311' as shown in fig. 4, a triangular frame 311 "as shown in fig. 5, or a cylinder or an irregular body.

Fig. 6 is a schematic structural view of the explosion-proof barrier material unit filled in the storage tank. As can be seen from fig. 6, in the process of filling the blocking explosion-proof material unit into the oil storage tank, the blocking explosion-proof material unit 31 of the triangular prism frame 311 ″ is selected near the periphery of the tank wall of the oil storage tank, the blocking explosion-proof material unit 31 'of the rectangular prism frame 311' is selected in the middle, the frame of the blocking explosion-proof material unit is fixedly connected by the cross-shaped fixing piece 32, and finally, the blocking explosion-proof material unit 31 or the cylindrical body (not shown in the figure) with the square frame 311 is filled in the herringbone hole, so as to complete the filling process. For filling the horizontal storage tank, the shape of the blocking explosion-proof material unit bodies in the semicircular spheres at two sides is also considered. When the tank body and the in-tank separation explosion-proof material are cleaned, the tank body is emptied as long as the separation explosion-proof material unit bodies are sequentially moved out of the tank, the operation is convenient, the time is saved, and the labor intensity is low.

Fig. 7 is a schematic view of a partial structure of the oil overflow tank according to the present invention. As can be seen from fig. 7, an oil leak hole 41 is opened in the bottom of the oil spill pool 4, and the oil spill pool 4 and the intermediate layer 13 of the tank 1 communicate with each other by the arrangement of the oil leak hole 41. In order to improve the safety performance of the oil storage tank and achieve the purpose of taking precautionary measures in time once oil spilling, roof collapse and the like occur when the oil storage tank is filled with oil, an oil spill detection device 2 is also arranged in the oil spilling pool 4, and comprises a probe 23, a signal conversion or power amplification controller 21 and an alarm 22. When oil vapor in the oil leakage hole 41 permeates into the interlayer 13 of the tank body 1, the probe 23 in the oil leakage detection device 2 also arranged in the interlayer 13 can detect the leaked oil vapor, an electric signal generated later is transmitted to the alarm 22 through the signal conversion or power amplification controller 21, and the alarm 22 gives an alarm after receiving the signal to remind an operator of taking corresponding measures. The oil leakage detection device is arranged doubly, so that the detection sensitivity is improved, the condition that a certain detection device fails and the leakage of oil and gas is not detected when the detection device cannot work is also prevented, and the potential safety hazard is avoided. In order to prevent pollution, a rain-proof cover plate 42 is arranged above the oil spilling pool 4.

Fig. 7 and 8 are respectively a partial structural schematic view of a double-layer tank wall of the oil storage tank of the invention and a structural schematic view of a connecting rib on the inner wall of the oil storage tank of the invention. Referring to fig. 8, the inner wall 11 and the outer wall 12 of the tank body 1 are made of carbon steel Q235, and the thicknesses of the inner wall and the outer wall are different from each other. In the process of processing the tank body 1, the two half outer tank bodies are processed by separating the outer tank according to the conventional tank body processing method, and then the two half outer tank bodies are sleeved on the inner tank in an involution way. Therefore, as shown in fig. 8, a connecting rib 121 is fixedly arranged on the outer side of the inner tank wall 12 for connecting and supporting the inner and outer tank walls. The ribs 121 are generally linearly spaced along the axial direction of the can body 1 and preferably have a width of 40 to 50 mm. And the spacing between the inner and outer tank walls, i.e. the thickness of the interlayer 13, is in the range 30-50 mm. As shown in fig. 7, in order to achieve a better oil storage effect, the outer wall of the oil storage tank is further provided with an anticorrosive layer 7 and a heat insulation layer 8, the anticorrosive layer 7 is formed by coating an extra-strong asphalt anticorrosive protective layer material on the outer wall of the oil storage tank, and some extra-strong epoxy moldy asphalt anticorrosive materials are adopted to implement anticorrosive protection on the outer wall of the oil storage tank.

In addition, as shown in fig. 1, an oil discharge valve 9 is provided at the bottom of the tank 1, one end of the oil discharge valve 9 is communicated with the interlayer 13, and the other end is communicated with the tank 1, so that the overflowing medium is pumped back into the tank 1.

Example two

Fig. 9 is a schematic view of the internal structure of the tank body provided with the compartment plate according to the present invention. As can be seen from fig. 9, one or more compartment panels 10 may also be provided inside the tank 1 of the oil storage tank to divide the volume of the tank 1 into two or more relatively independent compartments. The setting of compartment board 10 has strengthened the intensity of the oil storage tank jar body on the one hand, and on the other hand separates into independent cabin separately with the oil storage tank, can splendid attire the petrol of two or more different grade numbers oil simultaneously, if: 90^#、93^#、97^#And the like, so as to meet the requirement of storing various oil products in the same oil storage tank.

It should be noted that in this embodiment, a dirt cleaning channel is required to be arranged in each chamber, and a dirt discharging valve is correspondingly arranged so as to clean and discharge dirt in time.

Claims (15)

1. The utility model provides a safe environment-friendly buries ground oil storage tank, its jar body adopts inside and outside jar wall bilayer structure, is formed with intermediate layer, its characterized in that between inside and outside jar wall: and the interlayer formed by the inner cavity of the tank body and the double-layer tank wall is respectively filled with an explosion-proof barrier material, meanwhile, an oil leakage detection device is arranged in the interlayer of the double-layer tank wall, an oil overflow tank is arranged at the manhole cover of the tank body, and the bottom of the oil overflow tank is communicated with the interlayer of the double-layer tank wall.

2. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein the tank body is internally provided with a vertical shaft, the top end of the vertical shaft is arranged at a position corresponding to the manhole cover on the tank body, the vertical shaft is a frame vertically penetrating through the tank body along a radial direction, the two ends of the frame are respectively provided with an upper arc-shaped end plate and a lower arc-shaped end plate, more than one inner container is arranged in the frame, and the interior of each inner container is filled with a blocking explosion-proof material.

3. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein a decontamination tunnel is arranged at the bottom of the inner cavity of the tank body, the decontamination tunnel is formed by enclosing a semicircular metal net and a supporting framework arranged at the lower part of the semicircular metal net, two end parts of the decontamination tunnel are abutted against the inner side of the inner tank wall, and a layer of filter screen is covered on the metal net.

4. The safe and environment-friendly buried oil storage tank according to claim 1 or 2, characterized in that the barrier explosion-proof material filled in the inner cavity of the tank body is a barrier explosion-proof material unit body, the barrier explosion-proof material unit body comprises a second frame formed by enclosing angle steel, a protective net woven by steel wires is arranged outside the second frame, and a sheet-shaped mesh material or a spherical material with a high pore structure is filled in the second frame.

5. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein the barrier explosion-proof material filled in the interlayer of the double-layer tank wall is a sheet material with a high pore structure, and multiple layers of the barrier explosion-proof material are wound on the outer side of the inner tank wall and are filled in the interlayer space.

6. The safe and environment-friendly buried oil storage tank according to claim 1, wherein an oil leakage detection device is also arranged in the oil overflow tank.

7. The safe and environment-friendly buried oil storage tank according to claim 1 or 6, wherein the oil leakage detection device comprises a probe, a signal conversion controller or a power amplification controller and an alarm, an electric signal generated after the probe detects is transmitted to the alarm through the signal conversion controller or the power amplification controller, and the alarm gives an alarm after receiving the signal.

8. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein the inner tank wall and the outer tank wall have different wall thicknesses, and the thickness of the outer tank wall is smaller than that of the inner tank wall.

9. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein the outside of the inner tank wall is provided with a connecting rib for supporting and connecting the inner and outer tank walls.

10. The safe and environment-friendly buried oil storage tank as claimed in claim 9, wherein the connecting ribs are arranged at intervals along the axial direction of the tank body.

11. A safe and environmentally friendly buried oil storage tank as claimed in claim 1, wherein the distance between the inner and outer tank walls is in the range of 30-50 mm.

12. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein an anti-corrosion layer is arranged on the outer side of the outer tank wall.

13. The safe and environment-friendly buried oil storage tank as claimed in claim 12, wherein a heat insulation layer is further arranged outside the corrosion-resistant layer.

14. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein an oil discharge valve is arranged at the bottom of the outer side of the outer tank wall, one end of the oil discharge valve is communicated with the interlayer, and the other end of the oil discharge valve is communicated with the inner cavity of the tank body, and is used for pumping gasoline overflowing from the interlayer back into the tank body.

15. The safe and environment-friendly buried oil storage tank as claimed in claim 1, wherein the inner cavity of the tank body is provided with a compartment plate, the tank body is divided into more than one closed cavity, and the closed cavity is used for storing different oil products in the same oil storage tank.