Double-layer barrier type anti-explosion oil tank

Abstract

The invention relates to a double-layer blocking type anti-explosion oil tank which comprises an outer layer tank body, an inner layer tank body, a blocking anti-explosion material, a safety accessory system, a pressure control system and a grounding device, and the outer layer tank body and the inner layer tank body are coaxially arranged in a sleeving mode and fixed through a connecting piece to form an interlayer space in an enclosing mode; a leakage detection sensor is mounted at the bottom of the interlayer space; the inner-layer tank body is filled with a barrier explosion-proof material with a matched outline, the safety accessory system comprises a liquid level monitor, a high-liquid-level sound-light alarm device, an emergency pressure relief device, an electrostatic grounding alarm instrument, an automatic fire extinguisher and an anti-static lightning protection system, the pressure control system comprises a breather valve and a safety valve, and the grounding device comprises an electrostatic grounding electrode and a lightning protection grounding electrode. According to the double-layer blocking type anti-explosion oil tank, through the integrated structure and the multi-protection design, the anti-explosion performance, the anti-leakage performance and the safety protection performance are greatly improved, and the double-layer blocking type anti-explosion oil tank is suitable for various oil product storage places with high safety requirements.

Description

Technical Field

[0001] This invention relates to the field of oil storage container technology, and in particular to a double-barrier explosion-proof oil tank. Background Technology

[0002] In industries such as petroleum, chemical, and transportation, the safe storage of flammable and explosive oil products is a crucial link in ensuring production operations and the safety of personnel and property. Existing oil storage tanks suffer from several technical deficiencies: First, some tanks use a single-layer structure, which has weak impact resistance and leak-proof capabilities. Damage to the tank can easily lead to oil leaks, causing environmental pollution and safety accidents. Second, explosion-proof protection measures are often simplistic, relying on single explosion-proof materials or basic safety accessories, which are insufficient to withstand multiple risks such as open flames, static electricity, impacts, and lightning strikes, resulting in a high risk of explosion and fire. Third, safety accessories lack effective linkage; for example, liquid level monitoring and feed control do not form a closed loop, easily leading to overfilling and overflow. Static grounding status is not monitored in real time, and accumulated static electricity can easily ignite. Fourth, some tanks lack dedicated leak detection devices, failing to detect leaks in a timely manner, wasting energy and increasing the risk of explosion. Therefore, there is an urgent need for an explosion-proof oil tank with multiple explosion-proof protection features, leak-proof monitoring, linked safety accessories, and environmentally friendly and energy-saving characteristics to address the shortcomings of existing technologies. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a double-layer barrier explosion-proof oil tank to overcome the defects and shortcomings of the prior art and products as described in the background art.

[0004] The technical solution adopted by this invention to solve its technical problem is: a double-layer barrier explosion-proof oil tank, comprising an outer tank body, an inner tank body, barrier explosion-proof material, a safety accessory system, a pressure control system, and a grounding device; the outer tank body and the inner tank body are both made of high-strength corrosion-resistant steel plates coaxially sleeved together, and are fixed and enclosed by connectors to form a sandwich space, with a leakage detection sensor installed at the bottom of the sandwich space; the barrier explosion-proof material fills the inner cavity of the inner tank body and is adapted to the internal contour of the inner tank body; the safety accessory system includes a liquid level monitor, a high liquid level audible and visual alarm device, etc. The system includes an emergency pressure relief device, an electrostatic grounding alarm, an automatic fire extinguisher, and an anti-static lightning protection system. The pressure control system includes a breathing valve and a safety valve. The grounding device includes an electrostatic grounding electrode and a lightning protection grounding electrode. The liquid level monitor, high liquid level audible and visual alarm, emergency pressure relief device, automatic fire extinguisher, breathing valve, and safety valve are all installed on the top of the outer tank. The electrostatic grounding alarm is installed on the side of the outer tank. The lightning rod of the anti-static lightning protection system is vertically installed on the edge of the outer tank, and its grounding network is connected to the lightning protection grounding electrode. The electrostatic grounding alarm is electrically connected to the electrostatic grounding electrode.

[0005] Furthermore, the explosion-proof barrier material is an aluminum-magnesium alloy mesh structure with a pore size of 3-8 mm, a filling density of 0.05-0.08 g / cm³, a porosity of ≥90%, and a tensile strength of ≥200 MPa.

[0006] Preferably, the inner tank is made of Q345R corrosion-resistant steel plate with a thickness of ≥8mm, and the outer tank is made of Q345R corrosion-resistant steel plate with a thickness of ≥6mm; the distance between the inner tank and the outer tank is 120-180mm.

[0007] Preferably, the connecting parts are made of stainless steel and are evenly distributed along the circumference and axial direction of the inner and outer tanks.

[0008] Furthermore, the liquid level monitor is electrically connected to the high liquid level audible and visual alarm device. The trigger threshold of the high liquid level audible and visual alarm device is 95% of the rated capacity of the tank. After triggering, the feed pipeline can be cut off through the electromagnetic valve. The liquid level monitor uses a capacitive sensor with a measurement accuracy of ±1mm.

[0009] Furthermore, in the pressure control system, the working pressure range of the breather valve is -0.02MPa to 0.03MPa, used to automatically adjust the pressure inside the tank; the set pressure of the emergency pressure relief device is 0.04 to 0.06MPa, and the opening pressure of the safety valve is higher than the pressure relief pressure of the emergency pressure relief device.

[0010] Furthermore, the grounding resistance of the electrostatic grounding electrode is ≤10Ω, the grounding resistance of the lightning protection grounding electrode is ≤10Ω, the grounding network is made of galvanized flat steel extending along the outer side of the outer tank, and the grounding electrode is inserted into the ground to a depth ≥2m.

[0011] To elaborate further, the automatic fire extinguisher is an ABC type dry powder fire extinguishing device with a trigger temperature threshold of 75-85℃, and is equipped with an automatic start function of a temperature sensor and a flame sensor, as well as a manual start button.

[0012] To elaborate further, the leakage detection sensor is an oil-sensitive resistor sensor that is electrically connected to an external audible and visual alarm terminal to monitor oil leakage in the interlayer space in real time and trigger an alarm.

[0013] The beneficial effects of this invention are as follows: The double-layer barrier explosion-proof oil tank has significant explosion-proof performance: the inner tank is filled with aluminum-magnesium alloy mesh barrier explosion-proof material, which can quickly disperse the energy of open flames, static electricity, impacts, etc., and block the spread of flames. Combined with the double-layer high-strength tank structure, it greatly reduces the risk of explosion and fire; closed-loop anti-leakage monitoring: the double-layer tank design forms a protective barrier, and the outer layer can block oil leakage from the inner layer; the leakage detection sensor in the interlayer space monitors in real time and triggers alarms in a timely manner to avoid environmental pollution and the expansion of hidden dangers; comprehensive safety linkage: liquid level monitoring, high liquid level alarm and feed cut-off linkage to prevent overloading, static grounding monitoring and lightning protection system to eliminate the hidden dangers of static electricity and lightning strikes, and multiple pressure control and automatic fire extinguishing devices work together to comprehensively mitigate storage risks. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 A schematic diagram of the main structure (partial cross-section) for the invention of a double-layer barrier explosion-proof oil tank.

[0016] In the diagram: 1. Outer tank; 2. Inner tank; 3. Explosion-proof barrier material; 4. Connector; 5. Interlayer space; 6. Leakage detection sensor; 7. Liquid level monitor; 8. High liquid level alarm device; 9. Emergency pressure relief device; 10. Static grounding alarm device; 11. Automatic fire extinguisher; 12. Breathing valve; 13. Safety valve. Detailed Implementation

[0017] A double-barrier explosion-proof oil tank, such as Figure 1 As shown, the outer tank 1 is made of Q345R high-strength corrosion-resistant steel plate with a thickness of ≥6mm, rolled and welded. The inner tank 2 is made of Q345R steel plate with a thickness of ≥8mm. The outer tank 1 and the inner tank 2 are coaxially fitted together and fixed and enclosed by connectors 4 to form a sealed interlayer space 5. The distance between the inner tank 2 and the outer tank 1 is 120-180mm. The connectors 4 are made of stainless steel and are evenly arranged along the circumference and axial direction of the inner tank 2 and the outer tank 1. They are fixed to the outer wall of the inner tank 2 and the inner wall of the outer tank 1 by double-sided full welding process. The welding strength meets the welding standard of GB / T 985.1-2008, ensuring that there is no relative displacement of the double tanks during transportation, installation and use, and that the overall structure is stable.

[0018] An oil-sensitive resistor-type leakage detection sensor 6 (model: YS-200) is installed at the center of the bottom of the interlayer space 5. The sensor is electrically connected to the audible and visual alarm terminal (model: BJ-300) in the duty room via a shielded wire. The detection response time is ≤2s. When leakage occurs in the inner tank 2, the alarm terminal can be triggered in real time to emit an audible alarm of over 85dB and a red flashing light. The connection between the outer tank 1 and the inlet / outlet oil pipeline adopts a PN1.6MPa flange sealing structure and is equipped with an oil-resistant rubber gasket. The mounting holes of the top accessories are all adapted to special sealing gaskets. The overall sealing performance has been tested and can reduce oil evaporation loss by 35%.

[0019] The inner cavity of the inner tank 2 is uniformly filled with an aluminum-magnesium alloy mesh barrier explosion-proof material 3. This material has a pore size of 3-8mm, a filling density of 0.05-0.08g / cm³, a porosity ≥90%, a tensile strength ≥200MPa, stable chemical properties, does not react with oil, and maintains stable explosion-proof performance within the design temperature range of -20℃ to 60℃. A layered compaction process is used during filling to ensure that the material completely conforms to the internal contour of the inner tank 2, without gaps or loosening, effectively dispersing the energy generated by open flames and electrostatic impacts.

[0020] The liquid level monitor 7 uses a capacitive sensor (model: YW-100), installed at the center of the top of the outer tank 1, with the detection probe extending to the bottom of the inner tank 2. It has a measurement accuracy of ±1mm and transmits liquid level data in real time. The high-level audible and visual alarm device 8 (model: SBJ-500) is electrically linked to the liquid level monitor 7. The trigger threshold is 95% of the tank's rated capacity. When an alarm is triggered, a cut-off signal is simultaneously sent to the solenoid valve of the feed pipeline to stop feeding. The emergency pressure relief device 9 (model: XY-0.6) is installed on one side of the top of the outer tank 1, with a set pressure relief pressure of 0.04~0.06MPa and an opening response time ≤0.5s. The pressure control system's breather valve 12 (model: HF)... The working pressure range of the -20) tank is -0.02MPa to 0.03MPa. The opening pressure of safety valve 13 (model: A28H-16) is higher than the pressure relief pressure of emergency pressure relief device 9. Both are installed on the top of the outer tank 1 and connected to the inner tank 2 to form dual pressure protection. The electrostatic grounding alarm 10 (model: JD-10) is installed on the lower side of the outer tank 1 and electrically connected to the electrostatic grounding electrode. The grounding resistance is set to a threshold of ≤10Ω, and an alarm is triggered immediately when the resistance exceeds the threshold. The lightning rod of the anti-static lightning protection system is installed vertically on the edge of the outer tank 1. Its grounding network is connected to the lightning protection grounding electrode. The grounding network uses galvanized flat steel extending along the outside of the outer tank 1. The lightning protection grounding electrode is φ20mm. Galvanized steel pipe, inserted underground to a depth of ≥2m, grounding resistance ≤10Ω; Automatic fire extinguisher 11 is an ABC type dry powder fire extinguishing device (model: MFZ / ABC8), installed on the top of the outer tank 1, with a trigger temperature threshold of 75~85℃, equipped with a temperature sensor, flame sensor and manual start button, fire extinguishing level is 8B, and can quickly respond to oil fires.

[0021] In practical use, this double-walled explosion-proof oil tank stores oil in the inner tank 2, with a liquid level monitor 7 monitoring the liquid level in real time and automatically cutting off the feed when the liquid level is high; the explosion-proof material 3 blocks the spread of flames and reduces the risk of explosion; the leakage detection sensor 6 in the interlayer space 5 monitors the leakage prevention status in real time; the pressure control system stabilizes the pressure inside the tank, and the grounding and lightning protection system eliminates the hazards of static electricity and lightning strikes; in the event of a fire, the automatic fire extinguisher 11 responds quickly, ensuring comprehensive storage safety.

[0022] The above embodiments are only used to explain the present invention and are not intended to limit the protection of the present invention. Any non-substantial modifications made based on the essential solution of the present invention should fall within the protection scope of the present invention.

Claims

1. A double-wall, vapor-impermeable, explosion-proof tank, characterized in that: The application relates to a double-layered tank, which comprises an outer tank body (1), an inner tank body (2), a barrier explosion-proof material (3), a safety accessory system, a pressure control system and a grounding device; the outer tank body (1) and the inner tank body (2) are coaxially sleeved with high-strength corrosion-resistant steel plates, are fixed through connecting pieces (4) and form a sandwich space (5), and a leakage detection sensor (6) is arranged at the bottom of the sandwich space (5); the barrier explosion-proof material (3) is filled in the inner cavity of the inner tank body (2) and is matched with the inner contour of the inner tank body (2); the safety accessory system comprises a liquid level monitor (7), a high liquid level sound-light alarm device (8), an emergency pressure relief device (9), an electrostatic grounding alarm instrument (10), an automatic fire extinguisher (11) and an anti-static lightning protection system; the pressure control system comprises a breathing valve (12) and a safety valve (13), and the grounding device comprises an electrostatic grounding pole and a lightning grounding pole; the liquid level monitor (7), the high liquid level sound-light alarm device (8), the emergency pressure relief device (9), the automatic fire extinguisher (11), the breathing valve (12) and the safety valve (13) are all arranged on the top of the outer tank body (1), the electrostatic grounding alarm instrument (10) is arranged on the side of the outer tank body (1), lightning rods of the anti-static lightning protection system are vertically arranged on the edges of the outer tank body (1), a grounding network of the lightning rods is connected with the lightning grounding pole, and the electrostatic grounding alarm instrument (10) is electrically connected with the electrostatic grounding pole.

2. The double-wall barrier tank according to claim 1, characterized in that: The barrier explosion-proof material (3) is an aluminum-magnesium alloy net structure, the aperture of the net structure is 3-8 mm, the filling density is 0.05-0.08 g / cm3, the porosity is greater than or equal to 90%, and the tensile strength is greater than or equal to 200 MPa.

3. The double-wall barrier tank of claim 1, wherein: The outer tank body (1) is made of Q345R steel plates with a thickness greater than or equal to 6 mm, the inner tank body (2) is made of Q345R steel plates with a thickness greater than or equal to 8 mm, and the spacing between the outer tank body (1) and the inner tank body (2) is 120-180 mm.

4. The double-wall, vapor-impermeable, explosion-proof tank of claim 1, wherein: The connecting pieces (4) are made of stainless steel and are uniformly arranged along the circumferential direction and the axial direction of the inner tank body (2) and the outer tank body (1).

5. The double-wall, vapor-impermeable, explosion-proof tank of claim 1, wherein: The liquid level monitor (7) is electrically connected with the high liquid level sound-light alarm device (8), the trigger threshold of the high liquid level sound-light alarm device (8) is 95% of the rated capacity of the tank, and after triggering, the feeding pipeline can be cut off through an electromagnetic valve; the liquid level monitor (7) adopts a capacitive sensor, and the measurement accuracy is plus or minus 1 mm.

6. The double-wall, vapor-impermeable, explosion-proof tank of claim 1, wherein: In the pressure control system, the working pressure range of the breathing valve (12) is-0.02 MPa-0.03 MPa, which is used for automatically adjusting the pressure in the tank; the opening pressure of the safety valve (13) is higher than that of the emergency pressure relief device (9), and the set pressure relief pressure of the emergency pressure relief device (9) is 0.04-0.06 MPa.

7. The double-wall, vapor-impermeable, explosion-proof tank of claim 1, wherein: The grounding resistance of the electrostatic grounding pole is less than or equal to 10 omega, the grounding resistance of the lightning grounding pole is less than or equal to 10 omega, and the grounding network is made of galvanized flat steel and extends along the outside of the outer tank body (1), and the grounding pole is inserted into the ground with a depth greater than or equal to 2 m.

8. The double-wall, vapor-impermeable, explosion-proof tank of claim 1, wherein: The automatic fire extinguisher (11) is an ABC dry powder fire extinguishing device, the trigger temperature threshold is 75-85 DEG C, and the automatic start function of the temperature sensor and the flame sensor and the manual start button are provided.

9. The double-wall barrier tank of claim 1, wherein: The leakage detection sensor (6) is an oil-sensitive resistance sensor, which is electrically connected with an external audible and light alarm terminal, monitors the oil leakage in the interlayer space (5) in real time and triggers an alarm.

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