A sealing device for the floating roof of an explosion-suppressing floating roof tank.

Abstract

This utility model discloses a sealing device for an explosion-suppressing floating roof tank, comprising an inner floating roof with a circular outer wall and chamfered corners at its end face. A sealing airbag is installed on the outer wall of the inner floating roof, and an exhaust pipe is provided on the end face of the inner floating roof. Another connecting pipe extends to the outer side of the bottom surface of the inner floating roof. Pumping mechanisms are installed in both the air pump box and the liquid pump box. This utility model, through components such as the air pump box, the sealing airbag, and the pumping mechanism, dynamically controls the air pressure inside the sealing airbag by utilizing the sliding of a piston along the inner wall of the air pump box in the pumping mechanism. This allows the contact pressure between the sealing airbag and the tank wall to be flexibly adjusted according to the rising and falling requirements of the inner floating roof. This ensures the sealing airbag's effectiveness in blocking oil and gas while avoiding a sharp increase in frictional resistance during the rising and falling of the inner floating roof due to excessive contact pressure. It effectively solves the core contradiction of traditional static sealing devices: reliable sealing results in high resistance, while low resistance results in poor sealing.

Description

Technical Field

[0001] This utility model relates to the field of sealing device technology, specifically to a sealing device for an explosion-suppressing floating roof tank. Background Technology

[0002] As the core storage equipment for volatile, flammable, and explosive liquids such as crude oil and gasoline, the performance of the floating roof sealing device directly determines the effectiveness of oil and gas leakage prevention and the operational safety of the tank. It must not only block the escape of oil and gas by tightly fitting the tank wall (avoiding resource loss and explosion risk), but also adapt to the dynamic working conditions of the floating roof rising and falling with the liquid level (reducing sliding resistance to reduce wear of the seals). Therefore, the balance between "sealing reliability" and "dynamic adaptability" has become the core technical requirement of this type of device.

[0003] In existing floating roof sealing devices, traditional rubber scraper seals or filler seals mostly adopt a static structural design: if the contact pressure between the scraper and the tank wall is increased to enhance the sealing effect, the frictional resistance will increase dramatically when the floating roof rises and falls, accelerating the wear of the seals and potentially causing jamming; if the contact pressure is reduced to decrease the resistance, sealing gaps are easily generated due to deviations in the ellipticity of the tank wall or tilting of the floating roof, leading to excessive oil and gas leakage. Therefore, this utility model proposes an explosion-suppressing floating roof tank floating roof sealing device to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, such as the contradiction between sealing and dynamic adaptability, poor drive coordination, rapid wear of seals, and high risk of oil and gas leakage, this invention achieves a balance between sealing and low resistance, coordinated operation of multiple components, and reduced friction of liquid seals by incorporating a sealing airbag with dynamically adjustable air pressure, an explosion-proof telescopic rod and push plate with coordinated drive, and an oil spray structure. This avoids problems such as poor sealing or high resistance, drive jamming, rapid wear of seals, and oil and gas leakage.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a sealing device for an explosion-suppressing floating roof tank, comprising an inner floating roof, the outer wall of which is circular, and the corners of the inner floating roof end face are chamfered. A sealing airbag is installed on the outer wall of the inner floating roof. An exhaust pipe is provided on the end face of the inner floating roof and extends to the outside of the end face. A pump air box and a pump liquid box are installed on the end face of the inner floating roof. A connecting pipe is fixedly connected to the outer wall of the pump air box and communicates with the inside of the sealing airbag. Two sets of connecting pipes are fixedly connected to the outer wall of the pump liquid box. A one-way valve is installed in each of the two sets of connecting pipes. A spray plate is fixedly connected to the corner of the end face of the inner floating roof and is located above the sealing airbag. The outer diameter of the spray plate is slightly smaller than the outer diameter of the sealing airbag. One set of connecting pipes communicates with the spray plate, and the other set of connecting pipes extends to the outside of the bottom surface of the inner floating roof. A pumping mechanism is installed in both the pump air box and the pump liquid box. The pumping mechanism inside the pump box is used to control the air pressure inside the sealed airbag, thereby reducing the resistance when the inner floating disk floats. The pumping mechanism inside the pump tank is used to spray a small amount of oil onto the outer wall of the sealing airbag, thereby achieving liquid sealing and further reducing wear.

[0006] Preferably, the pumping mechanism includes two sets of pistons, which slide in the air tank and the liquid tank respectively. Each set of pistons has a connecting rod slidably connected to one side of its outer wall, which extends to the outside of the air tank and the liquid tank.

[0007] Preferably, an explosion-proof telescopic rod is fixedly connected to the end face of the inner floating disk, and a push plate is fixedly connected to the telescopic end of the explosion-proof telescopic rod. Both sets of connecting rods are fixedly connected to the outer wall of the push plate.

[0008] Preferably, the spray plate has a plurality of spray holes on the side facing the sealing airbag, and the spray holes are inclined downward along the circumference of the spray plate.

[0009] Preferably, the inclination angle of the spray hole is consistent with the chamfer angle of the corner of the inner floating plate end face.

[0010] (III) Beneficial Effects Compared with the prior art, this utility model provides a sealing device for the floating roof of an explosion-suppressing floating roof tank, which has the following beneficial effects: 1. This utility model uses components such as a pump air box, a sealing air bladder, and a pumping mechanism. By utilizing the sliding of the piston in the pumping mechanism along the inner wall of the pump air box, the air pressure inside the sealing air bladder can be dynamically controlled. This allows the contact pressure between the sealing air bladder and the tank wall to be flexibly adjusted according to the rising and falling requirements of the inner floating roof. This ensures the sealing air bladder's blocking effect on oil and gas while avoiding a sharp increase in frictional resistance during the rising and falling of the inner floating roof due to excessive contact pressure. It effectively solves the core contradiction of traditional static sealing devices: reliable sealing results in high resistance, while low resistance results in poor sealing.

[0011] 2. This utility model utilizes components such as an explosion-proof telescopic rod, a push plate, a pump tank, and a spray plate. The explosion-proof telescopic rod drives the push plate to synchronously drive two sets of pumping mechanisms, achieving coordinated control of air pressure regulation and oil spraying. At the same time, the spray plate evenly sprays oil onto the outer wall of the sealing airbag to form a liquid seal layer and a lubrication layer. This not only improves the operational coordination of the multiple drive mechanisms but also reduces the relative wear between the sealing airbag and the tank wall, further reducing the risk of oil and gas leakage. It improves the problems of poor coordination of drive mechanisms, rapid wear of seals, and high risk of oil and gas leakage in existing devices. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a sealing device for an explosion-suppressing floating roof tank proposed in this utility model; Figure 2 for Figure 1 Structural diagram; Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the air box of the intermediate pump.

[0013] In the diagram: 1. Internal floating plate; 2. Exhaust pipe; 3. Sealing airbag; 4. Explosion-proof telescopic rod; 5. Pump air box; 6. Pump liquid box; 7. Connecting pipe one; 8. Connecting pipe two; 9. Push plate; 10. Spray plate; 11. Connecting rod; 12. Piston. Detailed Implementation

[0014] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0015] This utility model provides a technical solution for a sealing device for an explosion-suppressing floating roof tank: Please see Figure 1-3 A sealing device for an explosion-suppressing floating roof tank includes an inner floating roof 1 with a circular outer wall and chamfered corners at its end faces. A sealing airbag 3 is installed on the outer wall of the inner floating roof 1. An exhaust pipe 2 is provided on the end face of the inner floating roof 1, extending beyond the outer end face. A pump air box 5 and a pump liquid box 6 are installed on the end face of the inner floating roof 1. A connecting pipe 7 is fixedly connected to the outer wall of the pump air box 5 and communicates with the sealing airbag 3. The pump liquid... Two sets of connecting pipes 8 are fixedly connected to the outer wall of the box 6. One-way valves are installed in both sets of connecting pipes 8. A spray plate 10 is fixedly connected to the corner of the end face of the inner floating plate 1 and is located above the sealing airbag 3. The outer diameter of the spray plate 10 is slightly smaller than the outer diameter of the sealing airbag 3. One set of connecting pipes 8 is connected to the spray plate 10, and the other connecting pipe 8 extends to the outer side of the bottom surface of the inner floating plate 1. Pumping mechanisms are installed in both the pump air box 5 and the pump liquid box 6. The pumping mechanism inside the air box 5 is used to control the air pressure inside the sealing airbag 3, thereby reducing the resistance when the inner floating disk 1 floats. The pumping mechanism inside the pump tank 6 is used to spray a small amount of oil onto the outer wall of the sealing airbag 3, which further reduces wear while achieving liquid sealing. Furthermore, the exhaust pipe 2 is located near the center of the inner floating plate 1 end face to avoid interference between the exhaust pipe 2 and other components inside the tank, while also being able to promptly discharge any residual oil and gas above the inner floating plate 1 end face.

[0016] The pumping mechanism includes two sets of pistons 12, which slide in the air tank 5 and the liquid tank 6 respectively. Each set of pistons 12 has a connecting rod 11 slidably connected to one side of the outer wall of each set of pistons 12, which extends to the outside of the air tank 5 and the liquid tank 6. Furthermore, the connection position between the connecting rod 11 and the piston 12 is located at the center of the side of the piston 12 away from the inner wall of the pump air box 5 and the pump liquid box 6. This ensures that when the connecting rod 11 pushes the piston 12 to slide, the piston 12 can move smoothly along the inner wall of the pump air box 5 and the pump liquid box 6, avoiding jamming of the piston 12 due to uneven force, and solving the problem of easy jamming of the drive mechanism in traditional devices. In addition, the length of the connecting rod 11 extending outside the pump air box 5 and the pump liquid box 6 is consistent, which can ensure that the sliding stroke of the two sets of pistons 12 is synchronized, and improve the coordination of the pumping mechanism operation.

[0017] An explosion-proof telescopic rod 4 is fixedly connected to the end face of the inner floating disk 1. A push plate 9 is fixedly connected to the telescopic end of the explosion-proof telescopic rod 4. Both sets of connecting rods 11 are fixedly connected to the outer wall of the push plate 9. Furthermore, the shape of the push plate 9 is adapted to the shape of the end face of the inner floating disk 1, and the push plate 9 is set parallel to the end face of the inner floating disk 1, so that when the explosion-proof telescopic rod 4 pushes the push plate 9 to move, the push plate 9 can drive the two sets of connecting rods 11 to be evenly stressed.

[0018] The spray plate 10 has several spray holes on the side facing the sealing airbag 3, and the spray holes are inclined downward along the circumference of the spray plate 10. Furthermore, the spray holes are evenly distributed on the side of the spray plate 10 facing the sealing airbag 3, which allows the oil pumped from the liquid tank 6 to the spray plate 10 through the connecting pipe 2 8 to be evenly sprayed onto the outer wall of the sealing airbag 3 through the spray holes, thus avoiding accelerated wear on the outer wall of the sealing airbag 3 due to lack of local oil lubrication.

[0019] The inclination angle of the spray hole is consistent with the chamfer angle of the corner of the end face of the inner floating plate 1.

[0020] In practical use, the working principle of this utility model is as follows: When the explosion-suppressing floating roof tank's floating roof sealing device is in operation, the inner floating roof 1 moves up and down synchronously with the rise and fall of the liquid level in the tank. During this process, in order to solve the contradiction of "high resistance when the seal is reliable and poor sealing when the resistance is low" in traditional static sealing devices, the pumping mechanism in the air pump box 5 dynamically regulates the air pressure in the sealing airbag 3 through the connecting pipe 7. When the inner floating roof 1 needs to rise or fall to adapt to changes in the liquid level, the piston 12 in the pumping mechanism slides along the inner wall of the air pump box 5 and fills or discharges gas into the sealing airbag 3 through the connecting pipe 7, adjusting the contact pressure between the sealing airbag 3 and the tank wall. This ensures that the sealing airbag 3 fits tightly against the tank wall to prevent oil and gas from escaping, while also avoiding a sharp increase in frictional resistance when the inner floating roof 1 rises and falls due to excessive contact pressure. This effectively alleviates the conflict between sealing and dynamic adaptability in traditional devices.

[0021] At the same time, the pumping mechanism in the pump tank 6 operates synchronously, drawing a small amount of oil from the storage tank through the connecting pipe 2 8 extending to the outer side of the bottom surface of the inner floating plate 1. Under the one-way conduction of the one-way valve, the oil is transported to the spray plate 10 through another set of connecting pipe 2 8. Since the spray plate 10 has evenly distributed and downward-sloping spray holes on the side facing the sealing airbag 3, and the tilt angle of the spray holes is consistent with the chamfer angle of the end face corner of the inner floating plate 1, the oil can be evenly sprayed onto the outer wall of the sealing airbag 3 through the spray holes. On the one hand, a liquid seal layer is formed to fill the possible small gaps between the sealing airbag 3 and the tank wall, further reducing the risk of oil and gas leakage. On the other hand, a lubricating layer is formed at the contact interface between the sealing airbag 3 and the tank wall, reducing wear when the two slide relative to each other, and solving the problem of shortened life of traditional seals due to long-term friction.

[0022] The explosion-proof telescopic rod 4 serves as the power source for the pumping mechanism. Its telescopic end drives the push plate 9 to reciprocate in a direction parallel to the end face of the inner float 1. Since both sets of connecting rods 11 are fixed on the outer wall of the push plate 9, and the connection position between the connecting rod 11 and the piston 12 is located at the center of the side of the piston 12 away from the inner wall of the pump air box 5 and the pump liquid box 6, the movement of the push plate 9 can synchronously drive the two sets of connecting rods 11 and the corresponding pistons 12 to slide smoothly in the pump air box 5 and the pump liquid box 6, respectively, thus avoiding the piston 12 from jamming due to uneven force.

[0023] During this process, the exhaust pipe 2 installed on the end face of the inner floating roof 1 can promptly discharge any residual oil and gas above the end face of the inner floating roof 1, reducing the risk of oil and gas coming into contact with the sealing airbag 3 and forming an explosive mixture, and further enhancing the explosion suppression effect of the device.

[0024] In summary, this device achieves a balance between sealing and low resistance through dynamic air pressure regulation of the sealing airbag 3, achieves the dual effects of liquid sealing and friction reduction through oil spraying, and enables multi-component coordinated operation by driving the pumping mechanism with the help of the explosion-proof telescopic rod 4. It effectively solves the problems of contradiction between sealing and dynamic adaptability, poor coordination of drive mechanism, rapid wear of seals and high risk of oil and gas leakage in traditional floating roof sealing devices.

[0025] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A floating roof seal device for a floating roof tank for suppressing explosion, comprising an inner floating roof (1), characterized in that: The outer wall of the inner floating plate (1) is circular, and the corners of the end face of the inner floating plate (1) are chamfered. A sealing airbag (3) is installed on the outer wall of the inner floating plate (1). An exhaust pipe (2) is provided on the end face of the inner floating plate (1) and extends to the outside of the end face. A pump air box (5) and a pump liquid box (6) are installed on the end face of the inner floating plate (1). A connecting pipe (7) is fixedly connected to the outer wall of the pump air box (5) and communicates with the sealing airbag (3). Two sets of connecting pipes are fixedly connected to the outer wall of the pump liquid box (6). Connector 2 (8), both sets of connecting pipes 2 (8) are equipped with one-way valves, a spray plate (10) is fixedly connected to the corner of the end face of the inner floating plate (1) and is located above the sealing airbag (3), the outer diameter of the spray plate (10) is slightly smaller than the outer diameter of the sealing airbag (3), one set of connecting pipes 2 (8) is connected to the spray plate (10), and the other connecting pipe 2 (8) extends to the outside of the bottom surface of the inner floating plate (1), and a pumping mechanism is installed in the air tank (5) and the liquid tank (6); The pumping mechanism inside the air box (5) is used to control the air pressure inside the sealing airbag (3) in order to reduce the resistance when the inner floating plate (1) floats. The pumping mechanism inside the pump tank (6) is used to spray a small amount of oil onto the outer wall of the sealing airbag (3), thereby achieving liquid sealing and further reducing wear.

2. The explosion suppression floating roof tank deck seal apparatus according to claim 1, wherein: The pumping mechanism includes two sets of pistons (12), which slide in the air tank (5) and the liquid tank (6) respectively. Each set of pistons (12) has a connecting rod (11) slidably connected to one side of the outer wall of each set of pistons (12), which extends to the outside of the air tank (5) and the liquid tank (6).

3. The explosion suppression floating roof tank deck seal apparatus of claim 2, wherein: An explosion-proof telescopic rod (4) is fixedly connected to the end face of the inner floating plate (1), and a push plate (9) is fixedly connected to the telescopic end of the explosion-proof telescopic rod (4). Both sets of connecting rods (11) are fixedly connected to the outer wall of the push plate (9).

4. The explosion suppression floating roof tank deck seal apparatus of claim 3, wherein: The spray plate (10) has several spray holes on the side facing the sealing airbag (3), and the spray holes are inclined downward along the circumference of the spray plate (10).

5. The explosion suppression floating roof tank deck seal apparatus of claim 4, wherein: The inclination angle of the spray hole is consistent with the chamfer angle of the end face corner of the inner floating plate (1).

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