A full liquid-in-tank floating disc liquid storage tank with pressure relief device

Abstract

This utility model discloses a fully liquid-contact internal floating plate storage tank with a pressure relief device. The tank includes a storage tank with two guide rods fixedly connected to its inner wall. An internal floating plate is slidably and sealingly connected to the two guide rods. A fixed frame is fixedly connected to the bottom of the internal floating plate. A first sealing block is provided within the fixed frame and slidably and sealingly connected to it. A first spring is fixedly connected to the side wall of the first sealing block and the inner wall of the fixed frame. A fixed cylinder is fixedly connected to the top of the storage tank, and a pressure relief mechanism is provided within the fixed cylinder. This utility model, through the coordinated operation of the first sealing block, the second sealing block, and the lifting sealing plate, can automatically adjust the pressure relief process according to real-time changes in the air pressure inside the storage tank. The first and second springs provide reliable reset elastic force to each moving part, ensuring that the first sealing block, the lifting sealing plate, etc., reset after air pressure balance, achieving a tight seal.

Description

Technical Field

[0001] This utility model relates to the field of pressure relief device technology, and in particular to a fully liquid-contact internal floating plate storage tank with a pressure relief device. Background Technology

[0002] In the petrochemical industry, fully wetted internal floating roofs are widely used in liquid storage tanks. By making close contact with the surface of the liquid inside the tank, they can effectively reduce liquid evaporation, reduce safety hazards, and improve storage efficiency.

[0003] Traditional fully liquid-contact internal floating roof pressure relief devices typically employ simple mechanical structures, such as one-way valves or gravity-type pressure relief ports. These devices suffer from several drawbacks: First, their pressure relief process relies on a fixed threshold trigger, making dynamic adjustment based on actual air pressure changes impossible. When the liquid injection rate is too fast, causing a rapid increase in air pressure, it is difficult to release the pressure quickly, potentially leading to deformation of the internal floating roof or even tank rupture. Second, after pressure relief, traditional devices exhibit poor resetting accuracy of the sealing structure, easily resulting in incomplete sealing and allowing outside air to backflow into the storage tank, contaminating the stored liquid and affecting product quality. To address these issues, this application proposes a fully liquid-contact internal floating roof storage tank with a pressure relief device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fully liquid-contact internal floating plate storage tank with a pressure relief device. Through the linkage of the first sealing block, the second sealing block, and the lifting sealing plate, the pressure relief process can be automatically adjusted according to the real-time air pressure changes in the storage tank. The first and second springs provide reliable reset elastic force to each moving part, ensuring that the first sealing block, the lifting sealing plate, etc., are reset after the air pressure is balanced, thus achieving a tight seal.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fully liquid-contact internal floating disk storage tank with a pressure relief device includes a storage tank, an inlet pipe fixedly connected to the rear end of the storage tank, an outlet hopper fixedly connected to the front end of the storage tank, two guide rods fixedly connected to the inner wall of the storage tank, an internal floating disk slidably connected to the two guide rods, a fixed frame fixedly connected to the bottom of the internal floating disk, a first sealing block fixedly connected to the fixed frame, a first spring fixedly connected to the side wall of the first sealing block and the inner wall of the fixed frame, and a fixed cylinder fixedly connected to the top of the storage tank, with a pressure relief mechanism inside the fixed cylinder.

[0007] Preferably, the pressure relief mechanism includes a fixed plate fixedly connected to the inner wall of the fixed cylinder, a telescopic rod fixedly connected to the top of the fixed plate, a lifting sealing plate fixedly connected to the top of the telescopic rod, a second spring sleeved on the outer wall of the telescopic rod, the two ends of the second spring being fixedly connected to the lifting sealing plate and the fixed plate respectively, a hollow column fixedly connected to the inner wall of the fixed cylinder, a second sealing block provided inside the hollow column and slidably connected thereto, a sliding rod fixedly connected to the bottom of the second sealing block, the sliding rod passing through the hollow column and slidably connected thereto, a push block fixedly connected to the bottom of the sliding rod, a connecting pipe fixedly connected to the side wall of the fixed frame, the connecting pipe passing through the liquid storage tank and fixedly connected thereto, and the end of the connecting pipe being fixedly connected to the top of the hollow column.

[0008] Preferably, the end of the inlet pipe is fixedly connected to the bottom of the inner float, and an electromagnetic valve is fixedly connected to the outer wall of the outlet hopper.

[0009] Preferably, the first sealing block has a square cross-section, and the fixing frame has a square groove that matches the first sealing block.

[0010] Preferably, both the inlet pipe and the connecting pipe are retractable flexible hoses.

[0011] Preferably, the outer wall of the lifting sealing plate is shaped like a frustum, and the inner wall of the fixed cylinder is provided with a frustum-shaped curved surface that matches the outer wall of the lifting sealing plate.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. Through the linkage of the first sealing block, the second sealing block and the lifting sealing plate, the pressure relief process can be automatically adjusted according to the real-time air pressure changes in the liquid storage tank; when the liquid injection causes the air pressure to increase, it can quickly respond and release the pressure to avoid damage to the tank due to excessive pressure.

[0014] 2. The first and second springs provide reliable reset elastic force for each moving part; after the air pressure is balanced, the first sealing block, the lifting sealing plate, etc. can be reset to achieve a tight seal, effectively prevent the backflow of external air, and ensure that the quality of the stored liquid is not contaminated.

[0015] 3. The components work together effectively. When liquid discharge causes negative pressure in the storage tank, external air can be quickly introduced to balance the pressure, preventing the internal floating plate from getting stuck due to uneven force, thus improving the stability and service life of the equipment.

[0016] In summary, through the coordinated operation of the first sealing block, the second sealing block, and the lifting sealing plate, the depressurization process can be automatically adjusted according to the real-time changes in air pressure inside the storage tank; the first and second springs provide reliable reset elastic force for each moving part, ensuring that the first sealing block, the lifting sealing plate, etc., are reset after the air pressure is balanced, thus achieving a tight seal. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a fully liquid-contact internal floating plate storage tank with a pressure relief device proposed in this utility model;

[0018] Figure 2 This is a first cross-sectional schematic diagram of a fully liquid-contact internal floating plate storage tank with a pressure relief device proposed in this utility model;

[0019] Figure 3 This is a second cross-sectional schematic diagram of a fully liquid-contact internal floating plate storage tank with a pressure relief device proposed in this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle.

[0021] In the diagram: 1. Storage tank, 2. Inlet pipe, 3. Outlet hopper, 4. Guide rod, 5. Inner float, 6. Fixing frame, 7. First sealing block, 8. First spring, 9. Connecting pipe, 10. Fixing cylinder, 11. Hollow column, 12. Second sealing block, 13. Sliding rod, 14. Push block, 15. Lifting sealing plate, 16. Fixing plate, 17. Telescopic rod, 18. Second spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 A fully liquid-contact internal floating disk storage tank with a pressure relief device includes a storage tank 1, which serves as the main liquid storage container for containing liquid. A liquid inlet pipe 2 is fixedly connected to the rear end of the storage tank 1, introducing liquid into the storage tank 1. The end of the liquid inlet pipe 2 is fixedly connected to the bottom of the internal floating disk 5. The liquid inlet pipe 2 is a retractable flexible hose, which can adapt to the up-and-down movement of the internal floating disk 5 during liquid injection or discharge to ensure continuous liquid delivery. A liquid outlet hopper 3 is fixedly connected to the front end of the storage tank 1, discharging liquid from the storage tank 1. An electromagnetic valve is fixedly connected to the outer wall of the liquid outlet hopper 3, precisely controlling the liquid outflow.

[0024] Two guide rods 4 are fixedly connected to the inner wall of the liquid storage tank 1. The guide rods 4 provide guidance for the movement of the inner floating plate 5, ensuring that the inner floating plate 5 slides up and down in a straight line. The two guide rods 4 are fitted together with the inner floating plate 5, which is sealed and slidably connected to it. The inner floating plate 5 isolates the liquid in the liquid storage tank 1 from the air above to prevent the liquid from evaporating, and achieves stable movement through cooperation with the guide rods 4.

[0025] A fixed frame 6 is fixedly connected to the bottom of the inner floating disk 5. The fixed frame 6 provides installation space and a moving track for the first sealing block 7. The first sealing block 7 is provided in the fixed frame 6 and is slidably connected to it. The first sealing block 7 slides in the fixed frame 6 to promote the flow of gas. The cross-section of the first sealing block 7 is square. The fixed frame 6 is provided with a square groove that matches the first sealing block 7 to ensure the sealing performance when the first sealing block 7 slides. The side wall of the first sealing block 7 and the inner wall of the fixed frame 6 are fixedly connected to a first spring 8. The first spring 8 provides the first sealing block 7 with a reset elastic force so that it returns to its initial position when the pressure is balanced.

[0026] A fixed cylinder 10 is fixedly connected to the top of the liquid storage tank 1. A pressure relief mechanism is provided inside the fixed cylinder 10. The pressure relief mechanism includes a fixed plate 16 fixedly connected to the inner wall of the fixed cylinder 10. The fixed plate 16 provides support for the telescopic rod 17 and the second spring 18 to ensure their stable operation. The telescopic rod 17 is fixedly connected to the top of the fixed plate 16. The telescopic rod 17 can extend and retract to cooperate with the lifting sealing plate 15 to achieve pressure relief and sealing functions. The lifting sealing plate 15 is fixedly connected to the top of the telescopic rod 17. The outer wall of the lifting sealing plate 15 is shaped like a frustum. The inner wall of the fixed cylinder 10 has a frustum-shaped curved surface that matches the outer wall of the lifting sealing plate 15. The lifting sealing plate 15 controls the opening and closing of the fixed cylinder 10 by moving up and down, thereby achieving pressure relief and sealing of the liquid storage tank 1. A second spring 18 is sleeved on the outer wall of the telescopic rod 17. The second spring 18 provides the lifting sealing plate 15 with a restoring elastic force, allowing it to return to a sealed state when the air pressure is balanced. The two ends of the second spring 18 are fixedly connected to the lifting sealing plate 15 and the fixed plate 16, respectively. A hollow column 11 is fixedly connected to the inner wall of the fixed cylinder 10. The hollow column 11 provides a moving space for the second sealing block 12 and is connected to the connecting pipe 9 to realize gas transmission. The second sealing block 12 is provided inside the hollow column 11 and is slidably connected to it. The second sealing block 12 slides inside the hollow column 11. By changing the gas pressure inside the hollow column 11, the lifting sealing plate 15 is linked to achieve pressure relief. A sliding rod 13 is fixedly connected to the bottom of the second sealing block 12. The sliding rod 13 transmits the movement of the second sealing block 12 to the push block 14. The sliding rod 13 passes through the hollow column 11 and is slidably connected to it. The bottom of the sliding rod 13 is fixedly connected to the push block 14. The push block 14 is used to push the lifting sealing plate 15 down to trigger the pressure relief process. A connecting pipe 9 is fixedly connected to the side wall of the fixed frame 6. The connecting pipe 9 is a retractable hose used to transmit the gas inside the fixed frame 6 to the hollow column 11 to adapt to the movement of the inner floating plate 5. The connecting pipe 9 passes through the liquid storage tank 1 and is fixedly connected to it. The end of the connecting pipe 9 is fixedly connected to the top of the hollow column 11.

[0027] In this invention, when liquid needs to be injected into the storage tank 1, liquid is injected into the storage tank 1 through the inlet pipe 2, increasing the pressure below the inner floating plate 5. At this time, the increased liquid and pressure below the inner floating plate 5 will push the first sealing block 7 to move within the fixed frame 6. During this process, the first spring 8 is compressed. When the first sealing block 7 moves to the right within the fixed frame 6, air is injected into the hollow column 11 through the connecting pipe 9, increasing the air pressure above the second sealing block 12. This will push the second sealing block 12, sliding rod 13, and push block 14 downward. The push block 14 first contacts the lifting sealing plate 15, pushing the lifting sealing plate 15 downward. During this process, the telescopic rod 17 retracts and the second spring 18 is compressed. The lifting sealing plate 15 moves downward and no longer contacts the inner wall of the fixed cylinder 10. The air above the inner floating plate 5 is discharged to the outside through the fixed cylinder 10, thereby releasing the increased air pressure inside the storage tank 1. When the pressure below the inner floating plate 5, the pressure above the inner floating plate 5, and atmospheric pressure are approximately equal, the first sealing block 7 moves downward. Under the action of spring 8, the first sealing block 7 is pushed to reset and move within the fixed frame 6. Air is drawn out of the hollow column 11 through the connecting pipe 9, causing the second sealing block 12, sliding rod 13, and push block 14 to move upwards. The push block 14 no longer contacts the lifting sealing plate 15. Finally, under the action of the compressed second spring 18, the lifting sealing plate 15 is pushed upwards, causing the outer wall of the lifting sealing plate 15 to abut and seal against the inner wall of the fixed cylinder 10, completing the pressure relief operation. When the liquid below the inner floating plate 5 is discharged, the inner floating plate 5... The negative pressure below causes the inner floating plate 5 to move downwards within the storage tank 1. Under the action of external atmospheric pressure, the lifting sealing plate 15 is pushed downwards, causing the lifting sealing plate 15 to no longer contact the inner wall of the fixed cylinder 10 (during this process, the telescopic rod 17 retracts and the second spring 18 is compressed). External air is injected into the storage tank 1 through the fixed cylinder 10 to balance the air pressure inside the storage tank 1. Finally, under the action of the compressed second spring 18, the lifting sealing plate 15 is reset and abuts against the inner wall of the fixed cylinder 10, thus completing the sealing of the storage tank 1.

Claims

1. A fully liquid-contact internal floating plate storage tank with a pressure relief device, comprising a storage tank (1), characterized in that, The rear end of the liquid storage tank (1) is provided with an inlet pipe (2) fixedly connected thereto. The front end of the liquid storage tank (1) is fixedly connected to an outlet hopper (3). The inner wall of the liquid storage tank (1) is fixedly connected with two guide rods (4). The two guide rods (4) are fitted together with an inner float (5) that is sealed and slidably connected thereto. The bottom of the inner float (5) is fixedly connected with a fixed frame (6). The fixed frame (6) is provided with a first sealing block (7) that is sealed and slidably connected thereto. The side wall of the first sealing block (7) and the inner wall of the fixed frame (6) are fixedly connected together with a first spring (8). The top of the liquid storage tank (1) is fixedly connected with a fixed cylinder (10). The fixed cylinder (10) is provided with a pressure relief mechanism.

2. A fully liquid-contact internal floating plate storage tank with a pressure relief device according to claim 1, characterized in that, The pressure relief mechanism includes a fixed plate (16) fixedly connected to the inner wall of the fixed cylinder (10), a telescopic rod (17) fixedly connected to the top of the fixed plate (16), a lifting sealing plate (15) fixedly connected to the top of the telescopic rod (17), a second spring (18) sleeved on the outer wall of the telescopic rod (17), the two ends of the second spring (18) being fixedly connected to the lifting sealing plate (15) and the fixed plate (16) respectively, and a hollow column (11) fixedly connected to the inner wall of the fixed cylinder (10). (11) is provided with a second sealing block (12) which is slidably connected to it. A sliding rod (13) is fixedly connected to the bottom of the second sealing block (12). The sliding rod (13) passes through the hollow column (11) and is slidably connected to it. A push block (14) is fixedly connected to the bottom of the sliding rod (13). A connecting pipe (9) is fixedly connected to the side wall of the fixed frame (6). The connecting pipe (9) passes through the liquid storage tank (1) and is fixedly connected to it. The end of the connecting pipe (9) is fixedly connected to the top of the hollow column (11).

3. A fully liquid-contact internal floating plate storage tank with a pressure relief device according to claim 1, characterized in that, The end of the inlet pipe (2) is fixedly connected to the bottom of the inner float (5), and an electromagnetic valve is fixedly connected to the outer wall of the outlet hopper (3).

4. A fully liquid-contact internal floating plate storage tank with a pressure relief device according to claim 1, characterized in that, The first sealing block (7) has a square cross-section, and the fixing frame (6) has a square groove that matches the first sealing block (7).

5. A fully liquid-contact internal floating plate storage tank with a pressure relief device according to claim 1, characterized in that, Both the inlet pipe (2) and the connecting pipe (9) are retractable hoses.

6. A fully liquid-contact internal floating plate storage tank with a pressure relief device according to claim 2, characterized in that, The outer wall of the lifting sealing plate (15) is shaped like a frustum, and the inner wall of the fixed cylinder (10) is provided with a frustum-shaped curved surface that matches the outer wall of the lifting sealing plate (15).

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