Device for fire resistance experiment of floating roof in atmospheric storage tank

Abstract

The utility model discloses a device for a fire resistance experiment of a floating roof in a normal pressure storage tank, which comprises a cofferdam, a frame is arranged on the cofferdam, a baffle plate is paved on the frame, a simulation storage tank positioned in the frame is fixedly arranged on the cofferdam, a hollow cavity is fixedly welded in the simulation storage tank, and the hollow cavity is communicated with the frame. And a floating disc is movably mounted on the hollow cavity. According to the utility model, through the arrangement of the hollow cavity, during an experiment, a worker adds fuel into the simulation storage tank, the fuel is only accumulated in the space between the hollow cavity and the simulation storage tank due to the existence of the hollow cavity, and the fuel is accumulated in the space between the hollow cavity and the simulation storage tank due to the large space volume of the bottom of the inner cavity of the simulation storage tank; therefore, the floating disc can float only by adding a small amount of fuel, the experiment requirement is met, the experiment cost is further reduced, convenience is provided for workers to process residual fuel after an experiment, and the device has the advantage of reducing the experiment cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of floating plates for storage tanks, and in particular relates to a device for fire resistance testing of floating roofs in normal pressure storage tanks. Background Art

[0002] The floating plate is an important equipment in the storage tank to reduce the evaporation loss of oil and prevent environmental pollution. In emergency situations such as fire, if the fire resistance of the floating plate is insufficient, it is easy to cause oil leakage and fire spread, thus posing a huge threat to personnel safety, equipment safety and environmental safety. Therefore, staff usually use the floating roof fire resistance test device to conduct a 2-hour floating plate fire resistance test to simulate a real fire scene and test the performance of the floating plate under extreme conditions. This helps companies to promptly discover and resolve safety hazards in the design of the floating plate and prevent the occurrence of fire accidents. After an emergency such as a fire occurs, if the floating plate can maintain structural integrity within a specific period of time, it can effectively control the fire in the sealing ring fire stage, winning a crucial time window for the fire rescue team. Therefore, conducting a fire resistance limit test on the floating plate is beneficial without any harm.

[0003] However, there are some problems with the existing technology: in order to make the experimental data accurate, the staff usually need to fill the entire space under the floating plate with fuel in the simulated storage tank so that the floating plate floats under the force. However, this method not only requires the use of a large amount of fuel to increase the experimental cost, but also increases the workload of the staff to clean up the remaining fuel after the experiment. Therefore, we propose a device for floating roof fire resistance test in atmospheric pressure storage tanks. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a device for floating roof fire resistance test in atmospheric pressure storage tanks, which reduces the fuel used in the experiment by arranging a hollow cavity in the simulated storage tank.

[0005] The utility model is implemented as follows: a device for floating roof fire resistance test in atmospheric pressure storage tanks comprises a cofferdam, a frame is arranged on the cofferdam, a baffle is laid on the frame, a simulated storage tank located inside the frame is fixedly installed on the cofferdam, a hollow cavity is fixedly welded inside the simulated storage tank, and a floating plate is movably installed on the hollow cavity.

[0006] Optionally, a through hole is opened at the bottom of the hollow cavity, and the diameter of the through hole is not less than 500 mm.

[0007] Optionally, reinforcing ribs are fixedly welded to the outer wall of the simulated storage tank, and a valve is fixedly connected to the simulated storage tank.

[0008] Optionally, an elastic sealing plate is fixedly mounted on the surface of the floating plate, and the elastic sealing plate abuts against the inner wall of the simulated storage tank.

[0009] Optionally, the length and width of the frame are not less than 10 meters, and the height is not less than 7 meters.

[0010] Optionally, the length and width of the cofferdam are not less than 15 meters, and the height is not less than 0.3 meters.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a hollow cavity. During the experiment, the staff adds fuel to the simulated storage tank. Due to the existence of the hollow cavity, the fuel will only accumulate in the space between the hollow cavity and the simulated storage tank. Since the hollow cavity fills the larger space volume at the bottom of the inner cavity of the simulated storage tank, only a small amount of fuel needs to be added to make the floating plate float, thereby meeting the experimental requirements, further reducing the experimental cost, and providing convenience for the staff to deal with the remaining fuel after the experiment.

[0013] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram provided by the utility model;

[0015] Figure 2 It is a schematic diagram of the top structure of the simulated storage tank provided by the utility model;

[0016] Figure 3 It is a schematic diagram of the bottom structure of the simulated storage tank provided by the utility model;

[0017] Figure 4 It is a structural schematic diagram of the top of the floating plate provided by the utility model;

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of the interior of a simulated storage tank provided by the utility model;

[0019] Figure 6 It is a schematic diagram of the structure without a hollow cavity in the existing simulated storage tank;

[0020] Figure 7 It is a schematic diagram of the structure after a hollow cavity is arranged in a simulated storage tank provided by the utility model.

[0021] In the figure: 1. cofferdam; 2. frame; 3. baffle; 4. simulated storage tank; 5. hollow cavity; 6. through hole; 7. reinforcing rib; 8. valve; 9. floating plate; 10. elastic sealing plate. DETAILED DESCRIPTION

[0022] In order to further understand the content, features and effects of the utility model, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0023] like Figures 1 to 7 As shown, an embodiment of the utility model provides a device for floating roof fire resistance test in atmospheric pressure storage tanks, including a cofferdam 1, a frame 2 is arranged on the cofferdam 1, a baffle 3 is laid on the frame 2, a simulated storage tank 4 located inside the frame 2 is fixedly installed on the cofferdam 1, a hollow cavity 5 is fixedly welded inside the simulated storage tank 4, and a floating plate 9 is movably installed on the hollow cavity 5.

[0024] The baffle 3 can be made of thermal insulation materials such as inorganic fireproof insulation board, aluminum silicate fiber needle-punched blanket, etc., and the thickness should be not less than 20 mm. The diameter of the simulated storage tank 4 is not less than 3.6 meters, and the height is not less than 1.2 meters. The material is Q235B steel plate with a thickness of not less than 8 mm. The diameter of the hollow cavity 5 is not more than 3.1 meters, and the height is not more than 0.4 meters. The inside of the cavity is isolated from the fuel, so as to achieve the purpose of both floating of the floating plate 9 and saving fuel, and at the same time avoid the cleaning and storage of a large amount of used fuel remaining after the test.

[0025] Furthermore, a through hole 6 is formed at the bottom of the hollow cavity 5, and the diameter of the through hole 6 is not less than 500 mm.

[0026] Through the design of the through hole 6, the air pressure inside the hollow cavity 5 can be kept in a balanced state with the external air pressure during the experiment, thereby preventing the heat generated by the combustion of laboratory fuel from causing a dangerous accumulation of pressure in the hollow cavity 5.

[0027] Furthermore, a reinforcing rib 7 is fixedly welded to the outer wall of the simulated storage tank 4 , and a valve 8 is fixedly connected to the simulated storage tank 4 .

[0028] The design of the reinforcing rib 7 can enhance the anti-deformation effect of the simulated storage tank 4, and the design of the valve 8 can facilitate the staff to collect the remaining fuel in the simulated storage tank 4 after the experiment.

[0029] Furthermore, an elastic sealing plate 10 is fixedly mounted on the surface of the floating plate 9 , and the elastic sealing plate 10 abuts against the inner wall of the simulated storage tank 4 .

[0030] Furthermore, the length and width of the frame 2 are not less than 10 meters, and the height is not less than 7 meters.

[0031] The frame 2 as a whole can be made of steel structure, and fireproof material can be applied on the surface, so as to increase the high temperature resistance of the frame 2 during the experiment and improve the service life of the frame 2.

[0032] Furthermore, the length and width of the cofferdam 1 are not less than 15 meters, and the height is not less than 0.3 meters.

[0033] Sand can be piled up and covered around the inner wall of the cofferdam 1 to prevent the flowing fire caused by the simulated leakage of the storage tank 4 from spreading further in the event of an accident.

[0034] During the experiment, the staff first cleans the simulated storage tank 4 to make the interior of the simulated storage tank 4 clean and free of foreign matter, then puts the floating plate 9 into the simulated storage tank 4, injects an appropriate amount of fuel, such as gasoline, alcohol, etc., into the simulated storage tank 4, then remotely ignites the fuel in the simulated storage tank 4, starts the experiment and records the time, and records the entire experiment on video and photographs for archiving. The experiment lasts for no less than 2 hours, and the appearance of the floating plate 9 is observed and recorded every 20 minutes. After burning for 2 hours, the fire source is extinguished, the appearance of the floating plate 9 is observed and recorded, and the floating plate 9 continues to float on the liquid surface for 2 hours, and the floating condition and leakage condition after burning are observed, and then the floating plate 9 is taken out of the simulated storage tank 4, its deformation and damage are observed, and then conclusions are drawn.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for fire resistance test of floating roof in atmospheric pressure storage tank, comprising a cofferdam (1), characterized in that: A frame (2) is provided on the cofferdam (1), a baffle (3) is laid on the frame (2), a simulated storage tank (4) located inside the frame (2) is fixedly installed on the cofferdam (1), a hollow cavity (5) is fixedly welded inside the simulated storage tank (4), and a floating plate (9) is movably installed on the hollow cavity (5).

2. The device for fire resistance test of floating roof in atmospheric pressure storage tank according to claim 1, characterized in that: A through hole (6) is provided at the bottom of the hollow cavity (5), and the diameter of the through hole (6) is not less than 500 mm.

3. The device for fire resistance test of floating roof in atmospheric pressure storage tank according to claim 1, characterized in that: A reinforcing rib (7) is fixedly welded to the outer wall of the simulated storage tank (4), and a valve (8) is fixedly connected to the simulated storage tank (4).

4. The device for fire resistance test of floating roof in atmospheric pressure storage tank according to claim 1, characterized in that: An elastic sealing plate (10) is fixedly mounted on the surface of the floating plate (9), and the elastic sealing plate (10) abuts against the inner wall of the simulated storage tank (4).

5. The device for fire resistance test of floating roof in atmospheric pressure storage tank according to claim 1, characterized in that: The length and width of the frame (2) are not less than 10 meters, and the height is not less than 7 meters.

6. The device for fire resistance test of floating roof in atmospheric pressure storage tank according to claim 1, characterized in that: The length and width of the cofferdam (1) are not less than 15 meters, and the height is not less than 0.3 meters.

Images