Modularized airport refueling deep shaft device with dirt hanging prevention function

Abstract

The invention relates to the technical field of rapid airport oil supply, in particular to a modular airport oil filling deep shaft device with a dirt hanging prevention function, which comprises a double-layer oil tank, a spliced barrel is arranged at the top of the double-layer oil tank, an oil inlet pipe and an oil supply pipe are arranged on two sides of the double-layer oil tank respectively, and valves are arranged on the oil inlet pipe and the oil supply pipe; the floating block drives the telescopic sleeve to synchronously ascend and descend along with the liquid level height, so that the liquid level sensor is located nearby the liquid level all the time, the real-time liquid level height is accurately collected, and reliable data basis is provided for oil inlet pipe flow control; in the liquid level changing process, the trace moisture sensors on the first mounting ring on the side wall of the telescopic sleeve and the second mounting ring on the inner wall of the disturbance ring can synchronously ascend and descend along with the mechanism and are always located below the liquid level, data drifting or electrode dry burning failure caused by the fact that a probe makes contact with air is avoided, and the sensors can cover the full liquid level range through position change; and the oil outlet quality of the deep shaft is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of airport rapid refueling, and particularly relates to a modular airport refueling deep well cylinder device with a dirt prevention function. BACKGROUND

[0002] The deep well cylinder for airport refueling is a key equipment for guaranteeing aviation kerosene storage and accurate fuel supply, is widely used in airport fuel supply systems, and has a core function of realizing safe storage and stable conveying of aviation kerosene and providing clean and qualified fuel for refueling equipment. The existing deep well cylinder for airport refueling realizes input and output of fuel by arranging an oil inlet pipe and an oil supply pipe, and some well cylinders are provided with basic liquid level detection or dirt removal structures to meet the basic requirements of oil storage and fuel supply. If a small amount of water is mixed in aviation kerosene, the combustion efficiency of the fuel will be seriously affected, and the engine parts may be corroded, so it is necessary to monitor the water content in the oil in real time by using a trace water detection sensor to guarantee the safety of fuel supply. However, the detection mechanism of the existing well cylinder is mostly fixedly installed. If the trace water detection sensor is fixed at the bottom of the cylinder, the water will easily settle and gather at the bottom with impurities when the oil is at rest, so that the sensor can only detect the water content in the local area at the bottom and cannot reflect the real water content of the oil at the whole liquid level, and the detection data has limitations. If the fixed position is too high, the data may drift due to contact with air, or even the electrode may be burned out, so it is difficult to guarantee the reliability of oil quality monitoring. Therefore, it is necessary to design a modular airport refueling deep well cylinder device with a dirt prevention function. SUMMARY

[0003] The purpose of the present application is to provide a modular airport refueling deep well cylinder device with a dirt prevention function, which has a simple structure and a reasonable design.

[0004] The present application achieves the above-mentioned purposes through the following technical solutions: A modular airport refueling deep well cylinder device with a dirt prevention function, comprising a double-layer oil tank, a spliced cylinder body arranged at the top of the double-layer oil tank, an oil inlet pipe and an oil supply pipe arranged at the two sides of the double-layer oil tank, and a valve arranged on each of the oil inlet pipe and the oil supply pipe; a floating detection mechanism arranged in the double-layer oil tank, and a dirt prevention mechanism and an oil disturbance mechanism arranged on the floating detection mechanism; the floating detection mechanism comprising a lower support fixed to the inner wall of the double-layer oil tank, a plurality of telescopic sleeves connected with each other and arranged at the top of the lower support, a first mounting ring arranged on the side wall of each telescopic sleeve, and a lifting and rotating mechanism arranged on the topmost telescopic sleeve.

[0005] As a further optimization scheme of the present application, the lifting and rotating mechanism comprises an upper support rotatably connected to the topmost telescopic sleeve, and an outer sleeve fixedly arranged at the center of the top of the upper support and slidably connected to a center column.

[0006] As a further optimization scheme of the present application, the center column is located inside the telescopic sleeve, and the bottom end of the center column is fixed on the lower support, a spiral guide groove is formed on the side wall of the center column, a spiral guide block is slidably connected in the spiral guide groove, and the spiral guide block is fixed on the inner wall of the outer sleeve.

[0007] As a further optimization scheme of the present application, the top of the upper support is provided with a liquid level sensor, and the bottom of the upper support is provided with a support rod, and a float is fixedly sleeved on the support rod.

[0008] As a further optimization scheme of the present application, the oil liquid disturbance mechanism comprises a disturbance ring fixed at the bottom end of the support rod, disturbance blades are uniformly arranged on the side wall of the disturbance ring, a second mounting ring is arranged on the inner wall of the disturbance ring, and trace moisture sensors are arranged on the first mounting ring and the second mounting ring.

[0009] As a further optimization scheme of the present application, the anti-dirt mechanism comprises a mounting plate fixed at the edge of the top of the upper support, and a U-shaped scraper is fixedly connected to the mounting plate and attached to the inner wall of the spliced cylinder.

[0010] As a further optimization scheme of the present application, the spliced cylinder comprises a plurality of double-layer cylinders stacked one above another, the double-layer cylinders are fixedly connected to each other through flanges, and first sealing gaskets are arranged between adjacent double-layer cylinders.

[0011] As a further optimization scheme of the present application, the double-layer cylinder comprises an inner cylinder and an outer cylinder, the inner cylinder is nested in the outer cylinder, and the inner cylinder and the outer cylinder are fixedly connected to each other through flanges, second sealing gaskets are arranged at the connection between the inner cylinder and the outer cylinder, and the outer cylinder at the bottom is fixed on the top of the double-layer oil tank.

[0012] As a further optimization scheme of the present application, the bottom of the double-layer oil tank is provided with a conical dirt collecting groove, and a dirt discharge pipe is arranged at the bottom of the conical dirt collecting groove.

[0013] The present application has the following advantages: 1. The float drives the telescopic sleeve to synchronously ascend and descend with the liquid level height, so that the liquid level sensor is always near the liquid level, real-time liquid level height is accurately collected, and reliable data basis is provided for flow control of the oil inlet pipe; the trace moisture sensors on the first mounting ring of the telescopic sleeve and the second mounting ring of the disturbance ring can synchronously ascend and descend with the mechanism, and are always below the liquid level, so that the probe is prevented from contacting air to cause data drift or electrode dry burning failure, and the position change can make the sensor cover the full liquid level range, thereby guaranteeing the oil outlet quality of the deep well cylinder.

[0014] 2、The outer sleeve in the liquid level change process is guided by the spiral guide block, ascends along the spiral guide groove of the center column, drives the upper support to rotate, and then makes the U-shaped scraper move in a circle along the inner wall of the inner cylinder, so that the oil stains and gum impurities adhered to the cylinder wall during the change of the liquid level are scraped in time, the oil stains are prevented from depositing, and the impurities scraped off can be settled to the conical sludge collecting groove for centralized treatment under the action of gravity.

[0015] 3、In the process that the support rod drives the disturbance ring to ascend and rotate synchronously, the disturbance blade can stir the oil to form a spiral vortex, break the suspended balance of impurities, accelerate the settlement of rust particles and free water to the conical sludge collecting groove, and the disturbance ring can also change synchronously with the liquid level, cover different liquid level areas, and eliminate the cleaning dead angle.

[0016] 4、The spliced cylinder in the application is formed by stacking a plurality of double-layer cylinders up and down through flanges, realizes the modular assembly of the deep well cylinder, can flexibly adjust the well depth according to actual needs, and greatly reduces the difficulty of long-distance transportation, reduces the construction period and operation intensity of on-site installation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the application; Figure 2 is a schematic diagram of the explosion structure of the application; Figure 3 is Figure 2 a local enlarged view of the A area in Figure 4 is a schematic diagram of the structure of the spliced cylinder in the application; Figure 5 is a schematic diagram of the structure of the anti-pollution mechanism and the oil disturbance mechanism in the application; Figure 6 is a schematic diagram of the structure of the lifting and rotating mechanism in the application; Figure 7 is Figure 6 a local enlarged view of the B area in

[0018] In the figure: 1, double-layer oil tank; 2, spliced cylinder; 3, oil inlet pipe; 4, oil supply pipe; 5, conical sludge collecting groove; 6, floating detection mechanism; 7, anti-pollution mechanism; 8, sludge discharge pipe; 9, oil disturbance mechanism; 10, sludge discharge valve; 21, double-layer cylinder; 22, first sealing washer; 61, lower support; 62, telescopic sleeve; 63, first mounting ring; 64, lifting and rotating mechanism; 65, support rod; 66, floating block; 67, second mounting ring; 71, mounting plate; 72, U-shaped scraper; 91, disturbance ring; 92, disturbance blade; 221, inner cylinder; 222, outer cylinder; 223, second sealing washer; 641, upper support; 642, outer sleeve; 643, center column; 644, spiral guide groove; 645, spiral guide block. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example: Please refer to Figures 1-7The utility model provides a modular airport refueling deep well cylinder device with anti-staining function, including double -layer oil groove 1, the top of double -layer oil groove 1 is provided with spliced cylinder 2, double -layer oil groove 1 as the bottom foundation unit of deep well cylinder, carries the weight of upper spliced cylinder 2 and the total load of aviation kerosene in cylinder, provides stable support, the inner layer of double -layer oil groove 1 directly contacts fuel, and the outer layer is as a protective layer, realizes the double functions of oil storage and anti -leakage, can avoid fuel direct leakage to soil or groundwater, and the both sides of double -layer oil groove 1 are provided with oil inlet pipe 3 and oil supply pipe 4 respectively, and the valve is set on oil inlet pipe 3 and oil supply pipe 4;Spliced cylinder 2 includes a plurality of double -layer cylinder 21 stacked up and down, adjacent double -layer cylinder 21 is fixed with each other through flange plate, and first sealing washer 22 is arranged between adjacent double -layer cylinder 21, and first sealing washer 22 can prevent fuel from leaking from the splicing seam of adjacent double -layer cylinder 21, and the double -layer cylinder 21 stacked up and down realizes the modular assembly of deep well cylinder, the depth of well cylinder is conveniently and flexibly adjusted, the difficulty of long-distance transportation and on-site installation is reduced, and double -layer cylinder 21 includes inner cylinder 221 and outer cylinder 222, inner cylinder 221 is nested in outer cylinder 222, and inner cylinder 221 and outer cylinder 222 are fixed with each other through flange, and second sealing washer 223 is arranged at the connecting place of inner cylinder 221 and outer cylinder 222, and second sealing washer 223 can prevent fuel from leaking between double -layer cylinder walls, inner cylinder 221 directly contacts aviation kerosene, the inner wall is coated with anticorrosive coating, prevents the impurity pollution of fuel from rusting cylinder wall, outer cylinder 222 is isolated from the soil corrosion of outside, groundwater soaking, simultaneously strengthens the overall rigidity of cylinder body, resists the stress brought by oil pressure and geological subsidence, the outer cylinder 222 of the bottommost part is fixed at the top of double -layer oil groove 1, the bottom of double -layer oil groove 1 is provided with conical sump 5, and conical sump 5 is located at the bottom of double -layer oil groove 1 and is in conical structure, utilizes gravity to guide the impurities and free water in fuel to converge to the bottom of tank, the bottom of conical sump 5 is provided with blowdown pipe 8, blowdown valve 10 is arranged on blowdown pipe 8, conical sump 5 provides accurate impurity convergence point for blowdown pipe 8, avoids the dispersion and accumulation of impurities in double -layer oil groove 1, blowdown pipe 8 is as an impurity discharge channel, one end is connected with the bottom of conical sump 5, and the other end is connected with ground oil treatment tank and discharges deposited impurities and moisture in a direction, oil inlet pipe 3 is as fuel injection channel, aviation kerosene in ground storage tank is transported to double -layer oil groove 1, and oil is stably lifted liquid level at the bottom, reduces the impurity suspension, guarantees the cleanliness of fuel, and the valve on oil inlet pipe 3 can quickly cut off the oil inlet passage, which is convenient for maintenance or emergency situation such as abnormal oil index, and oil supply pipe 4 extracts fuel from the bottom of double -layer oil groove 1 and is transported to airport refueling equipment, and the valve of oil supply pipe 4 is provided with on-line particle detection sensor, which can detect the quality of output oil, and avoid unqualified fuel flowing into the aircraft.

[0021] Please refer to Figures 1-7, the double-layer oil tank 1 is provided with a floating detection mechanism 6, the floating detection mechanism 6 is provided with an anti-pollution mechanism 7 and an oil liquid disturbance mechanism 9; the floating detection mechanism 6 includes a lower support 61 fixed on the inner wall of the double-layer oil tank 1, the top of the lower support 61 is provided with a plurality of slidingly connected telescopic sleeves 62, the outer diameter of the upper telescopic sleeve 62 is consistent with the inner diameter of the adjacent lower telescopic sleeve 62, the bottom of the telescopic sleeve 62 is provided with a limiting ring for preventing two telescopic sleeves 62 from being separated from each other, the topmost telescopic sleeve 62 is provided with a lifting and rotating mechanism 64, the lifting and rotating mechanism 64 includes an upper support 641 rotatably connected to the topmost telescopic sleeve 62, the top center of the upper support 641 is fixedly installed with an outer sleeve 642, the outer sleeve 642 is located inside the telescopic sleeve 62, the outer sleeve 642 is slidingly connected to a center column 643, the center column 643 is located inside the telescopic sleeve 62, and the bottom end of the center column 643 is fixed to the lower support 61, the lower support 61 is fixed to the inner wall of the double-layer oil tank 1, as the bottom mounting base of the telescopic sleeve 62 and the center column 643, bears the weight of the entire floating detection mechanism 6, and provides stable bottom support, ensures that the telescopic sleeve 62 does not tilt when lifting, the center column 643 penetrates the inside of the telescopic sleeve 62, the side wall is provided with a spiral guide groove 644, a spiral guide block 645 is slidingly connected in the spiral guide groove 644, and the spiral guide block 645 is fixed to the inner wall of the outer sleeve 642, the top of the upper support 641 is provided with a liquid level sensor for detecting the liquid level of the oil liquid, and the bottom of the upper support 641 is provided with a plurality of circumferentially distributed support rods 65, the middle of the support rod 65 is fixedly sleeved with a float 66, the float 66 is made of oil-resistant lightweight material and can float on the surface of the oil liquid, thereby driving the support rod 65, the telescopic sleeve 62 and the upper support 641 to lift synchronously through the buoyancy, the oil liquid disturbance mechanism 9 includes a disturbance ring 91 fixed at the bottom end of the support rod 65, disturbance vanes 92 are uniformly arranged on the side wall of the disturbance ring 91, a second mounting ring 67 is arranged on the inner wall of the disturbance ring 91, a first mounting ring 63 is arranged on the side wall of the telescopic sleeve 62, and a trace moisture sensor is arranged on the first mounting ring 63 and the second mounting ring 67, the probe of the sensor directly contacts the oil liquid, so that the moisture content of the oil liquid at the liquid level can be monitored, the anti-pollution mechanism 7 includes a mounting plate 71 fixed at the top edge of the upper support 641, the mounting plate 71 is fixedly connected with a U-shaped scraper 72, and the U-shaped scraper 72 is attached to the inner wall of the spliced barrel 2; the U-shaped scraper 72 is made of fluorine rubber material, and the side wall of the U-shaped scraper 72 can be attached to the inner wall of the inner barrel 221;The aviation kerosene injected into the double-layer oil tank 1 will immerse the floating block 66, and the floating block 66 will float under the action of the oil liquid buoyancy. When the liquid level rises, since the floating block 66 is fixed in the middle part of the support rod 65, the buoyancy of the floating block 66 is transmitted to the upper support 641 at the top through the support rod 65, so as to drive the upper support 641 to move upward synchronously. The bottom of the upper support 641 is connected to the most top telescopic sleeve 62, and then the plurality of telescopic sleeves 62 which slide with each other are pulled to stretch upward along the vertical direction of the lower support 61. Conversely, when the oil supply pipe 4 is pumping oil outward, the liquid level drops, and the floating block 66 sinks synchronously with the liquid level, so as to pull the telescopic sleeves 62 to contract, thereby ensuring that the mechanism always matches the height of the liquid level. The spiral guide block 645 on the inner wall of the outer sleeve 642 is embedded in the spiral guide groove 644. When the outer sleeve 642 moves linearly upward and downward with the upper support 641, the spiral guide block 645 slides along the spiral guide groove 644, so as to drive the outer sleeve 642 and the upper support 641 to rotate synchronously around the center column 643. When the upper support 641 rotates, the U-shaped scraper 72 moves along the inner wall of the inner cylinder 221 in a circular manner, so as to scrape off the oil stains and gum impurities adhered to the cylinder wall. The scraped impurities naturally settle in the conical dirt collecting groove 5 at the bottom of the double-layer oil tank 1 under the action of gravity, and wait for pollution cleaning. The bottom of the upper support 641 is connected to the disturbance ring 91 through the support rod 65. When the disturbance ring 91 rotates with the support rod 65, the disturbance blades 92 stir the oil liquid to form a spiral vortex, so as to break the suspension balance of the impurities, accelerate the settlement of the rust particles and free water in the oil liquid to the conical dirt collecting groove 5, and at the same time, the disturbance ring 91 can cover different depth ranges inside the spliced cylinder 2 when the disturbance ring 91 rises and falls with the support rod 65. The liquid level sensor at the top of the upper support 641 rises and falls synchronously with the mechanism, and is always near the liquid level, so as to accurately collect the real-time liquid level height of the oil liquid and provide data basis for the flow control of the oil inlet pipe 3. The first mounting ring 63 on the side wall of the telescopic sleeve 62 and the second mounting ring 67 on the inner wall of the disturbance ring 91 are both installed with trace moisture sensors. The sensor probe directly contacts the oil liquid, monitors the moisture content of the middle layer of the oil liquid, and the first mounting ring 63 rises and falls with the telescopic sleeve 62. When the oil liquid is at a high position, the trace moisture sensor can uniformly cover the entire depth range of the oil liquid, and when the liquid level of the oil liquid is lowered, the first mounting ring 63 can be lowered synchronously with the floating block 66, so that the trace moisture sensor is always below the liquid level, avoiding the probe from contacting air to cause data drift or electrode failure due to long-time dry burning, and ensuring the monitoring accuracy of the sensor.

[0022] It should be noted that the modular airport fueling deep well device with anti-staining function, when in use, the aviation kerosene in the ground storage tank is transported into the double-layer oil tank 1 through the oil inlet pipe 3, so that the oil liquid is smoothly lifted from bottom to top, and in the process, the valve on the oil inlet pipe 3 can adjust the flow according to the oil storage demand to prevent the oil liquid from overflowing due to overloading, when it is necessary to supply oil to the airport fueling equipment, the valve on the oil supply pipe 4 is opened to extract the oil liquid cleaned by sedimentation from the bottom of the double-layer oil tank 1, and in the oil supply process, the on-line particle detection sensor arranged in the valve of the oil supply pipe 4 can detect the quality of the output oil liquid to avoid unqualified fuel flowing into the aircraft; In the oil inlet and oil supply process, the oil liquid immerses the floating block 66, and the oil liquid height changes, and the floating block 66 can drive the supporting rod 65, the top supporting 641 and the bottom telescopic sleeve 62 to synchronously rise and fall by relying on the buoyancy, in the process, the lower supporting 61 serves as a fixed base to ensure that the telescopic sleeve 62 rises and falls without tilting, and the limiting rings of the telescopic sleeve 62 prevent the telescopic sleeve 62 from being separated from each other, so that the rising and falling is stable, when the outer sleeve 642 rises and falls with the upper supporting 641, the screw guide block 645 slides along the guide groove to drive the upper supporting 641 to synchronously rotate around the center column 643, in the process of liquid level change, the upper supporting 641 drives the U-shaped scraper 72 to rotate along the inner wall of the inner cylinder body 221 through the mounting plate 71, so as to scrape off the oil stains and gum impurities adhered to the cylinder wall, and the scraped impurities are settled into the conical oil collection tank 5 under the action of gravity, the disturbance ring 91 at the bottom end of the supporting rod 65 synchronously rises and rotates with the supporting rod 65, the disturbance blades 92 on the side wall of the disturbance ring 91 stir the oil liquid to form a spiral vortex, break the suspended balance of impurities, accelerate the sedimentation of rust particles and free water to the conical oil collection tank 5, and the rising and falling of the disturbance ring 91 can make the disturbance blades 92 cover different depth ranges inside the spliced cylinder body 2, so that there is no cleaning dead angle, and the liquid level sensor on the top of the upper supporting 641 rises and falls with the mechanism, is always close to the liquid level, and always collects liquid level data in real time to provide a basis for the valve flow control of the oil inlet pipe 3; the trace moisture sensor of the first mounting ring 63 on the side wall of the telescopic sleeve 62 and the second mounting ring 67 on the inner wall of the disturbance ring 91 can directly contact the oil liquid to detect the moisture in the oil liquid; During daily maintenance, the blow-off valve 10 on the blow-off pipe 8 is opened regularly to discharge the deposited impurities and moisture at the bottom of the groove at a small flow rate; when the moisture sensor or the particle sensor detects that the index exceeds the standard, the blow-off valve 10 is opened to blow off the oil at a large flow rate, and the blow-off oil after blow-off is transported to the ground oil treatment tank through the blow-off pipe 8 for centralized treatment.

[0023] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A modular airport refueling deep well device with anti-staining function, comprising a double-layer oil tank (1), characterized in that: The top of the double-layer oil tank (1) is provided with a spliced cylinder (2), the two sides of the double-layer oil tank (1) are respectively provided with an oil inlet pipe (3) and an oil supply pipe (4), the oil inlet pipe (3) and the oil supply pipe (4) are provided with valves, a floating detection mechanism (6) is arranged in the double-layer oil tank (1), the floating detection mechanism (6) is provided with a dirt prevention mechanism (7) and an oil disturbance mechanism (9), the floating detection mechanism (6) comprises a lower support (61) fixed on the inner wall of the double-layer oil tank (1), a plurality of telescopic sleeves (62) are arranged on the top of the lower support (61) and are connected with each other in sliding mode, a first mounting ring (63) is arranged on the side wall of the telescopic sleeve (62), and a lifting and rotating mechanism (64) is arranged on the top telescopic sleeve (62).

2. The modular airport refueling deep well shaft device with anti-staining function according to claim 1, characterized in that: The lifting and rotating mechanism (64) comprises an upper support (641) rotatably connected to the top telescopic sleeve (62), and an outer sleeve (642) is fixedly arranged at the top center of the upper support (641) and is slidably connected to a center column (643).

3. The modular airport refueling deep well shaft device with anti-staining function according to claim 2, characterized in that: The center column (643) is located in the telescopic sleeve (62), the bottom end of the center column (643) is fixed on the lower support (61), a spiral guide groove (644) is formed in the side wall of the center column (643), and a spiral guide block (645) is slidably connected to the spiral guide groove (644) and fixed to the inner wall of the outer sleeve (642).

4. The modular airport refueling deep well shaft device with anti-staining function according to claim 2, characterized in that: A liquid level sensor is arranged on the top of the upper support (641), and a support rod (65) is arranged on the bottom of the upper support (641) and fixedly sleeved with a floating block (66).

5. The modular airport refueling deep well shaft device with anti-staining function according to claim 4, characterized in that: The oil disturbance mechanism (9) comprises a disturbance ring (91) fixed to the bottom end of the support rod (65), disturbance blades (92) are uniformly arranged on the side wall of the disturbance ring (91), a second mounting ring (67) is arranged on the inner wall of the disturbance ring (91), and trace moisture sensors are arranged on the first mounting ring (63) and the second mounting ring (67).

6. The modular airport refueling deep well shaft device with anti-staining function according to claim 2, characterized in that: The dirt prevention mechanism (7) comprises a mounting plate (71) fixed to the top edge of the upper support (641), and a U-shaped scraper (72) is fixedly connected to the mounting plate (71) and abuts against the inner wall of the spliced cylinder (2).

7. The modular airport refueling deep well shaft device with anti-staining function according to claim 1, characterized in that: The spliced cylinder (2) comprises a plurality of double-layer cylinders (21) stacked one above another, the double-layer cylinders (21) are fixed to each other through flanges, and first sealing gaskets (22) are arranged between adjacent double-layer cylinders (21).

8. The modular airport refueling deep well shaft device with anti-staining function according to claim 7, characterized in that: The double-layer cylinder (21) comprises an inner cylinder (221) and an outer cylinder (222), the inner cylinder (221) is nested in the outer cylinder (222), and the inner cylinder (221) and the outer cylinder (222) are fixed to each other through flanges, second sealing gaskets (223) are arranged at the connection positions of the inner cylinder (221) and the outer cylinder (222), and the outer cylinder (222) at the bottom is fixed to the top of the double-layer oil tank (1).

9. The modular airport refueling deep well shaft device with anti-staining function according to claim 1, characterized in that: The bottom of the double-layer oil tank (1) is provided with a conical sump (5), the bottom of the conical sump (5) is provided with a sewage pipe (8), and the sewage pipe (8) is provided with a sewage valve (10).

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