Blocking anti-explosion edge sealing device for external floating roof storage tank

Abstract

The invention relates to the technical field of oil tank sealing, in particular to an external floating roof storage tank blocking anti-explosion edge sealing device which comprises a storage tank body, an oil inlet and outlet pipe is fixedly connected to the outer portion of the storage tank body, a floating roof is arranged in the storage tank body, a top cover is fixedly installed at the top end of the floating roof, and a pasting base is installed outside the floating roof in a surrounding mode. A sealing structure is arranged on the outer side of the pasting base and comprises a filling bag fixedly installed on one side of the pasting base, a large compensation elastic piece is attached to the outer portion of the filling bag, multiple sets of ejector rods are fixedly installed at the top end of the pasting base, arc-shaped rods are fixedly installed at the top ends of the multiple sets of ejector rods, and the outer portions of the ejector rods are fixedly connected with one end of the large compensation elastic piece. When the gap between the floating roof and the tank wall of the storage tank body is changed, the large compensation elastic piece is automatically adjusted through elastic deformation and is matched with the filling bag at the same time to keep close contact with the tank wall, the sealing performance is ensured, oil gas escape is reduced, the oil gas space is greatly eliminated, and the edge sealing effect of the outer floating roof storage tank is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil tank sealing, and particularly to a barrier explosion-proof edge sealing device for an external floating roof storage tank. Background Art

[0002] At present, the sealing structures used in large floating roof storage tanks at home and abroad are mainly two types: mechanical sealing plus secondary sealing and soft sealing plus secondary sealing. From the structural form, both have a relatively enclosed oil and gas space. When the storage tank is in the process of receiving and discharging oil, when the floating roof rises and falls, there will inevitably be combustible gas in the annular enclosed space formed by the primary and secondary seals. When its concentration approaches or exceeds the lower explosion limit of the combustible gas, an explosion accident will occur.

[0003] In the prior art, a patent with the publication number CN219858746U discloses a primary sealing device for floating disc edge sealing and a floating roof oil tank, including a floating disc adapter installed on one side of the floating disc, and a sealing component is further provided between the other side far from the floating disc adapter and the inner wall of the top cover oil tank. The sealing component includes a conductive plate, a sealing film and a scraper. The conductive plate is arranged on the floating disc adapter, the sealing film is arranged outside the conductive plate, and the scraper is arranged outside the sealing film.

[0004] The above structure forms a sealing component through the structural cooperation between the conductive plate, the sealing film and the scraper. However, at the edge seal of the external floating roof storage tank, due to the volatilization of light components or the leakage of the bladder seal, it is still easy to occur flash explosion or fire, and the sealing effect is not good. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a barrier explosion-proof edge sealing device for an external floating roof storage tank to solve the problems that at the edge seal of the external floating roof storage tank, due to the volatilization of light components or the leakage of the bladder seal, it is easy to occur flash explosion or fire in case of sparks and static electricity, and the sealing effect is not good.

[0006] Based on the above purpose, the present invention provides a barrier explosion-proof edge sealing device for an external floating roof storage tank, including a storage tank body. An inlet and outlet oil pipe is fixedly connected to the outside of the storage tank body, and a floating roof is arranged inside the storage tank body. A top cover is fixedly installed at the top of the floating roof. A seat is installed around the outside of the floating roof, and a sealing structure is arranged outside the seat;

[0007] The sealing structure includes a filling bladder fixedly installed on one side of the seat. A large compensation spring piece is attached to the outside of the filling bladder, and a liquid level sensor is arranged at the bottom end of the large compensation spring piece;

[0008] A plurality of ejector rods are fixedly installed at the top end of the sticker base. Arc-shaped rods are fixedly installed at the top ends of the plurality of ejector rods. One end of the outer part of the ejector rod is fixedly connected to one end of a large compensation elastic sheet. An auxiliary mechanism corresponding to the arc-shaped rod is further arranged on the inner wall of the storage tank body. The auxiliary mechanism is used to assist the floating roof to stably lift and lower inside the storage tank body;

[0009] A regulating device is further arranged at the bottom of the floating roof. The regulating device is electrically connected with the liquid level sensor. The regulating device is used to reduce the pressure of the floating roof on the oil body.

[0010] Preferably, the auxiliary mechanism includes a plurality of fixed side seats fixedly installed on the inner wall of the storage tank body. A sliding hole is formed inside the fixed side seat. A counterweight plate is slidably installed inside the sliding hole. A rotating rod is rotatably installed inside the counterweight plate. A rotating chuck is fixedly installed at one end of the rotating rod. A shifting rod is clamped on one side of the rotating chuck. The shifting rod is installed on the fixed side seat. An elastic sheet is attached to the outer part of the shifting rod;

[0011] A protection component is arranged at the other end of the rotating rod. The protection component is communicated with the regulating device.

[0012] Preferably, the filling bladder is one of a high-porosity mesh structure or a spherical structure, and the filling bladder is made of aluminum alloy.

[0013] Preferably, the counterweight plate corresponds to the arc-shaped rod. A clamping groove for accommodating the arc-shaped rod is formed at the bottom end of the counterweight plate.

[0014] Preferably, the regulating device includes an annular air injection pipe fixedly installed at the bottom end of the floating roof. A plurality of air outlet pipes are fixedly connected to the outer part of the annular air injection pipe. The air outlet pipes penetrate through the bottom of the sticker base. The top end of the air outlet pipe is fixedly connected to one outlet end of an electric three-way valve. The inlet end of the electric three-way valve is fixedly connected to a straight pipe. The other outlet end of the electric three-way valve is fixedly connected to a spray pipe. The electric three-way valve is electrically connected with the liquid level sensor. The straight pipe penetrates through the top of the sticker base. The top end of the straight pipe is fixedly connected to a telescopic pipe;

[0015] An annular gas transmission pipe is fixedly installed outside the storage tank body. A connecting pipe is communicated between the annular gas transmission pipe and the storage tank body. A spring return ball valve is arranged between the connecting pipe and the telescopic pipe. The spring return ball valve is fixedly installed on the inner wall of the storage tank body and is located on one side of the fixed side seat.

[0016] Preferably, the inside of the annular gas transmission pipe is filled with inert gas. The spray pipe is obliquely arranged, and the air outlet of the spray pipe faces the filling bladder.

[0017] Preferably, a metal sheet is fixedly installed at the top of the fixed side seat. Both the metal sheet and the arc-shaped rod are elastic structures, and the metal sheet and the ejector rod are arranged corresponding to each other vertically.

[0018] Preferably, the protection component includes a disc fixedly installed at the other end of the rotating rod, and a support rod is movably installed on one side of the disc;

[0019] A ratchet is fixedly installed at the valve stem of the spring return ball valve. The center of the ratchet is movably connected to the other end of the support rod, and a ratchet tooth is meshed outside the ratchet. The ratchet tooth is movably installed on one side of the support rod.

[0020] Preferably, the connection between one end of the support rod and the disc is eccentrically arranged, and the support rod is telescopically arranged.

[0021] The beneficial effects of the present invention:

[0022] When the gap between the floating roof and the tank wall of the storage tank body changes, the large compensation elastic sheet automatically adjusts through elastic deformation. At the same time, it cooperates with the filling bladder to maintain close contact with the tank wall, ensuring tightness, reducing oil and gas leakage, greatly eliminating the oil and gas space, and improving the edge seal effect of the external floating roof storage tank;

[0023] At the same time, when the floating roof rises and falls with the liquid level in the storage tank body, when the liquid level gradually becomes too high, the auxiliary mechanism keeps the floating roof rising and falling stably in the tank wall, avoiding tilting or jamming, which affects the operation. When the liquid level is too low, the floating roof descends. When the liquid level reaches the lower limit value and oil injection is required, the liquid level sensor signal is received to drive the regulating device to open, further reducing the pressure of the floating roof on the oil, so as to inject oil when the liquid level is too low and increase the oil injection speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the whole of the present invention;

[0026] Figure 2 It is an internal structure schematic diagram of the storage tank body of the present invention;

[0027] Figure 3 It is a partial enlarged structure schematic diagram of the storage tank body of the present invention;

[0028] Figure 4 For the present invention Figure 3 The enlarged structure schematic diagram of part A;

[0029] Figure 5 This is a schematic structural diagram of the connection part between the ball valve and the rotating shaft of the present invention;

[0030] Figure 6 This is a schematic overall structure diagram of the side seat of the present invention;

[0031] Figure 7 This is a front view structural schematic diagram of the electric three-way valve of the present invention.

[0032] In the figure, the markings are: 1, storage tank body; 2, inlet and outlet oil pipes; 3, floating roof; 4, sealing structure; 5, top cover; 6, attaching seat; 7, filling bladder; 8, large compensation spring plate; 9, liquid level sensor; 10, auxiliary mechanism; 11, fixed side seat; 12, adjusting device; 13, annular air injection pipe; 14, air outlet pipe; 15, electric three-way valve; 16, straight pipe; 17, telescopic pipe; 18, spring return ball valve; 19, connecting pipe; 20, annular gas transmission pipe; 21, spray pipe; 22, sliding hole; 23, counterweight plate; 24, card slot; 25, rotating rod; 26, rotating chuck; 27, lever; 28, spring plate; 29, disc; 30, support rod; 31, ratchet; 32, ratchet teeth; 33, ejector rod; 34, arc-shaped rod; 35, metal sheet; 36, protection assembly. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0034] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, an explosion isolation and explosion protection edge sealing device for an external floating roof storage tank includes a storage tank body 1, an inlet and outlet oil pipe 2 is fixedly connected to the outside of the storage tank body 1, a floating roof 3 is arranged inside the storage tank body 1, a top cover 5 is fixedly installed at the top end of the floating roof 3, attaching seats 6 are arranged around the outside of the floating roof 3, and a sealing structure 4 is arranged on the outside of the attaching seats 6;

[0035] The sealing structure 4 includes a filling bladder 7 fixedly installed on one side of the attaching seat 6, a large compensation spring plate 8 is attached to the outside of the filling bladder 7, and a liquid level sensor 9 is arranged at the bottom end of the large compensation spring plate 8;

[0036] A plurality of ejector rods 33 are fixedly installed at the top end of the attaching seat 6, arc-shaped rods 34 are fixedly installed at the top ends of the plurality of ejector rods 33, and one end of the large compensation spring plate 8 is fixedly connected to the outside of the ejector rod 33. An auxiliary mechanism 10 corresponding to the arc-shaped rod 34 is further arranged on the inner wall of the storage tank body 1, and the auxiliary mechanism 10 is used to assist the floating roof 3 to stably lift inside the storage tank body 1;

[0037] An adjusting device 12 is also provided at the bottom of the floating roof 3. The adjusting device 12 is electrically connected to the liquid level sensor 9, and the adjusting device 12 is used to reduce the pressure of the floating roof 3 on the oil body.

[0038] In this embodiment, when the gap between the floating roof 3 and the tank wall of the storage tank body 1 changes, the large compensation elastic piece 8 automatically adjusts through elastic deformation. At the same time, it cooperates with the filling bladder 7 to maintain close contact with the tank wall, ensuring the sealing performance, reducing the escape of oil and gas, greatly eliminating the oil and gas space, and improving the edge sealing effect of the external floating roof storage tank.

[0039] At the same time, when the floating roof 3 rises and falls with the liquid level in the storage tank body 1, when the liquid level gradually becomes too high, the auxiliary mechanism 10 keeps the floating roof 3 rising and falling stably in the tank wall, avoiding tilting or jamming and affecting the operation. When the liquid level is too low, the floating roof 3 descends. When the liquid level reaches the lower limit value and oil injection is required, the adjusting device 12 is driven to open by receiving the signal of the liquid level sensor 9, further reducing the pressure of the floating roof on the oil, so as to inject oil when the liquid level is too low and increase the oil injection speed.

[0040] As an embodiment, as Figure 1 、 Figure 2 、 Figure 3 shown, the filling bladder 7 is one of a high-porosity mesh structure or a spherical structure, and the filling bladder 7 is made of aluminum alloy.

[0041] In this embodiment, by using the filling bladder 7, it is lighter than the sponge filling of the same volume, provides more buoyancy, reduces the weight of the equipment. The filling bladder 7 is a special aluminum alloy material made by a hot rolling process, which changes the mechanical properties of the material. It is cut and stretched into a high-porosity mesh structure or further processed into a spherical body to adapt to different use environments, solves the problem of fragmentation during long-term use, can produce an energy absorption effect, and dilutes the energy when an explosion and combustion are about to occur and transfers the energy to the surrounding units.

[0042] As an embodiment, as Figure 1 、 Figure 2 、 Figure 3 shown, a metal sheet 35 is fixedly installed at the top of the fixed side seat 11. Both the metal sheet 35 and the arc-shaped rod 34 are elastic structures, and the metal sheet 35 and the ejector rod 33 are arranged in an up-and-down correspondence.

[0043] In this embodiment, when the floating roof 3 gradually rises too high, the auxiliary mechanism 10 keeps the floating roof 3 rising and falling stably within the tank wall, preventing tilting or jamming and affecting the operation. When the liquid level exceeds the upper limit, the top cover 5 contacts the metal sheet 35. During the movement, the metal sheet 35 is deformed under pressure. The metal sheet 35 is repositioned below the top cover 5 until the top end of the ejector rod 33 contacts the metal sheet 35, performing liquid level limit control to prevent the floating roof 3 from contacting or colliding with the tank top and avoiding damage to the sealing structure 4 or the structure of the floating roof 3.

[0044] Embodiment 2

[0045] As an embodiment, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 6 , the auxiliary mechanism 10 includes multiple groups of fixed side seats 11 fixedly installed on the inner wall of the storage tank body 1. A sliding hole 22 is formed inside the fixed side seat 11. A counterweight plate 23 is slidably installed inside the sliding hole 22. A rotating rod 25 is rotatably installed inside the counterweight plate 23. One end of the rotating rod 25 is fixedly installed with a rotating chuck 26. One side of the rotating chuck 26 is clamped with a lever 27. The lever 27 is installed on the fixed side seat 11, and an elastic piece 28 is attached to the outside of the lever 27.

[0046] The other end of the rotating rod 25 is provided with a protection component 36, and the protection component 36 is communicated with the adjusting device 12.

[0047] Among them, the counterweight plate 23 corresponds to the arc-shaped rod 34. A clamping groove 24 for accommodating the arc-shaped rod 34 is formed at the bottom end of the counterweight plate 23.

[0048] In this embodiment, when the floating roof 3 rises and falls with the liquid level in the storage tank body 1, when the liquid level gradually rises too high, the ejector rod 33 on the attaching seat 6 and the arc-shaped rod 34 move upward. One end of the arc-shaped rod 34 is clamped into the clamping groove 24 of the counterweight plate 23, driving the counterweight plate 23 to move in the sliding hole 22 of the fixed side seat. At this time, the rotating chuck 26 moves upward normally and the rotating rod 25 does not rotate, keeping the floating roof 3 rising and falling stably within the tank wall, preventing tilting or jamming and affecting the operation.

[0049] When the liquid level exceeds the upper limit, the top cover 5 contacts the metal sheet 35. During the movement, the metal sheet 35 is deformed under pressure. The metal sheet 35 is repositioned below the top cover 5 until the top end of the ejector rod 33 contacts the metal sheet 35, performing liquid level limit control to prevent the floating roof 3 from contacting or colliding with the tank top and avoiding damage to the sealing structure 4 or the structure of the floating roof 3.

[0050] When the liquid level is too low and the floating roof 3 descends, when the arc-shaped rod 34 moves downward, the counterweight plate 23 moves downward in the sliding hole 22 of the fixed side seat under the action of gravity. During the movement, after the rotating chuck 26 contacts the lever 27, the rotating chuck 26 rotates downward during the downward movement, driving the rotating rod 25 to rotate and move downward, opening the protection component 36.

[0051] Example 3

[0052] As an implementation method, as Figure 2 、 Figure 3 、 Figure 4 and Figure 7 shown, the adjusting device 12 includes an annular air injection pipe 13 fixedly installed at the bottom end of the floating roof 3. A plurality of air outlet pipes 14 are fixedly connected to the outside of the annular air injection pipe 13. The air outlet pipes 14 penetrate through the bottom of the attaching seat 6, and the top end of the air outlet pipe 14 is fixedly connected to one of the outlet ends of an electric three-way valve 15. The inlet end of the electric three-way valve 15 is fixedly connected to a straight pipe 16. The other outlet end of the electric three-way valve 15 is fixedly connected to a spray pipe 21. The electric three-way valve 15 is electrically connected to the liquid level sensor 9. The straight pipe 16 penetrates through the top of the attaching seat 6, and the top end of the straight pipe 16 is fixedly connected to a telescopic pipe 17;

[0053] An annular gas transmission pipe 20 is fixedly installed outside the storage tank body 1. A connecting pipe 19 is communicated between the annular gas transmission pipe 20 and the storage tank body 1. A spring return ball valve 18 is arranged between the connecting pipe 19 and the telescopic pipe 17. The spring return ball valve 18 is fixedly installed on the inner wall of the storage tank body 1, and the spring return ball valve 18 is located on one side of the fixed side seat 11.

[0054] Among them, the annular gas transmission pipe 20 is filled with inert gas. The spray pipe 21 is inclined, and the air outlet of the spray pipe 21 faces the filling bladder 7.

[0055] In this implementation method, when the liquid level reaches the lower limit value and oil injection is required, the signal of the liquid level sensor 9 is received and the valve action is controlled. According to the control signal, the valve of the electric three-way valve 15 is driven to open. When the liquid level reaches the limit value, the electric three-way valve 15 connects the straight pipe 16 and the air outlet pipe 14, and closes the air outlet of the spray pipe 21. In the same steps as above, the connecting pipe 19 in the annular gas transmission pipe 20 is connected to the telescopic pipe 17. The inert gas enters the annular air injection pipe 13 through the straight pipe 16 and the air outlet pipe 14. After the gas is sprayed downward at the bottom of the floating roof 3 through the annular air injection pipe 13, a layer of air cushion is formed between the floating roof 3 and the oil surface, reducing the direct contact area between the floating roof 3 and the oil. And the air cushion disperses part of the weight of the floating roof 3 to a larger area, thereby reducing the local pressure. At the same time, the inert gas sprayed by the annular air injection pipe 13 forms bubbles in the oil to generate additional buoyancy, partially offsetting the weight of the floating roof 3, further reducing the pressure of the floating roof on the oil, so as to inject oil when the liquid level is too low and increase the oil injection speed.

[0056] Example 4

[0057] As an implementation method, as Figure 3 、 Figure 4 、 Figure 5As shown, the protection assembly 36 includes a disc 29 fixedly mounted at the other end of the rotating rod 25, and a support rod 30 is movably mounted on one side of the disc 29;

[0058] A ratchet 31 is fixedly mounted on the valve stem of the spring return ball valve 18 . The center of the ratchet 31 is movably connected to the other end of the support rod 30 . A ratchet 32 ​​is meshed on the outer side of the ratchet 31 . The ratchet 32 ​​is movably mounted on one side of the support rod 30 .

[0059] Among them, one end of the support rod 30 is connected to the disc 29 in an eccentric arrangement, and the support rod 30 is retractable.

[0060] In this embodiment, when the floating roof rises and falls with the liquid level, the floating roof 3 keeps rising and falling stably under the auxiliary mechanism 10. When the liquid level drops, the rotating rod 25 is driven to rotate and move downward, and the disc 29 pulls the support rod 30 to move, and the ratchet 32 ​​drives the ratchet wheel 31 to rotate, and the spring reset ball valve 18 opens part, and the connecting pipe 19 in the annular gas pipe 20 is connected with the telescopic pipe 17. The inert gas is sprayed out through the straight pipe 16 and the nozzle 21 and stored in the filling bag 7. When the gap between the floating roof 3 and the tank wall of the storage tank body 1 changes, the large compensation spring 8 is automatically adjusted through elastic deformation, and at the same time squeezes the filling bag 7 to spray the gas inside, thereby reducing the oil and gas concentration;

[0061] At the same time, since one end of the support rod 30 is eccentrically connected to the disc 29, the rotating rod 25 rotates when it moves downward, and the support rod 30 on the disc 29 continuously pulls the ratchet 32 ​​to turn the ratchet wheel 31 to rotate, increasing the opening degree of the spring return ball valve 18, causing the inert gas to be ejected in a large amount, further reducing the concentration in the oil and gas space and reducing the risk of explosion.

[0062] Working principle: Oil is stored between the floating roof 3 and the tank body 1. When the oil inlet and outlet pipes 2 are in and out of the oil tank, the floating roof 3 rises and falls with the liquid level in the tank body 1. At the same time, when the gap between the floating roof 3 and the tank wall of the tank body 1 changes, the large compensation spring 8 automatically adjusts through elastic deformation and cooperates with the filling bag 7 to maintain close contact with the tank wall, ensuring sealing, reducing oil and gas escape, and greatly eliminating oil and gas space;

[0063] When the floating roof 3 rises and falls with the liquid level in the storage tank body 1, when the liquid level gradually becomes too high, the top rod 33 and the arc rod 34 on the seat 6 move upward, and one end of the arc rod 34 is clamped into the clamping groove 24 of the counterweight plate 23, driving the counterweight plate 23 to move in the sliding hole 22 of the fixed side seat. At this time, the rotating chuck 26 moves upward normally, the rotating rod 25 does not rotate, and when the disc 29 pulls the support rod 30 to move, the ratchet 32 ​​cannot drive the ratchet wheel 31 to rotate, and the spring return ball valve 18 cannot be opened, so as to keep the floating roof 3 stably rising and falling in the tank wall to avoid tilting or getting stuck, which affects the operation;

[0064] When the liquid level reaches the upper limit, the top cover 5 contacts the metal sheet 35. When moving, the metal sheet 35 is deformed under pressure. The metal sheet 35 is again located below the top cover 5 until the top end of the ejector rod 33 contacts the metal sheet 35, so as to limit the liquid level, prevent the floating roof 3 from contacting or colliding with the tank top, and avoid damaging the sealing structure 4 or the structure of the floating roof 3;

[0065] When the liquid level is too low, the floating roof 3 descends, resulting in an enlarged oil-gas space and an increased volume. When the arc-shaped rod 34 moves downward, under the action of the gravity of the counterweight plate 23, it moves downward in the sliding hole 22 of the fixed side seat. During the movement, when the rotary chuck 26 contacts the lever 27, the rotary chuck 26 rotates during the downward movement, driving the rotating rod 25 to rotate and move downward. When the disc 29 pulls the support rod 30 to move, the ratchet tooth 32 drives the ratchet wheel 31 to rotate, and the spring return ball valve 18 opens partially. The connecting pipe 19 in the annular gas transmission pipe 20 is communicated with the telescopic pipe 17. The inert gas is ejected through the straight pipe 16 and the nozzle 21 and stored inside the filling bladder 7. When the gap between the floating roof 3 and the tank wall of the storage tank body 1 changes, the large compensation elastic sheet 8 automatically adjusts through elastic deformation, and at the same time squeezes the filling bladder 7 to eject the gas inside, reducing the oil-gas concentration;

[0066] At the same time, since one end of the support rod 30 is eccentrically connected to the disc 29, when the rotating rod 25 moves downward and rotates, the support rod 30 on the disc 29 continuously pulls the ratchet tooth 32 to drive the ratchet wheel 31 to rotate, increasing the opening degree of the spring return ball valve 18, so that a large amount of inert gas is ejected, further reducing the concentration in the oil-gas space and reducing the explosion risk;

[0067] When the liquid level reaches the lower limit and oil injection is required, the signal of the liquid level sensor 9 is received and the valve action is controlled. According to the control signal, the electric three-way valve 15 is driven to open the valve. When the liquid level reaches the limit, the electric three-way valve 15 connects the straight pipe 16 and the air outlet pipe 14, closes the air outlet of the nozzle 21. In the same steps as above, the connecting pipe 19 in the annular gas transmission pipe 20 is communicated with the telescopic pipe 17. The inert gas enters the annular spray pipe 13 through the straight pipe 16 and the air outlet pipe 14. After jetting downward at the bottom of the floating roof 3 through the annular spray pipe 13, a layer of air cushion is formed between the floating roof 3 and the oil surface, reducing the direct contact area between the floating roof 3 and the oil. And the air cushion disperses part of the weight of the floating roof 3 to a larger area, thereby reducing the local pressure. At the same time, the inert gas jetted from the annular spray pipe 13 forms bubbles in the oil to generate additional buoyancy, partially offsetting the weight of the floating roof 3, further reducing the pressure of the floating roof on the oil, so as to inject oil when the liquid level is too low and increase the oil injection speed.

[0068] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0069] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An explosion-proof barrier edge sealing device for an external floating roof storage tank, comprising a storage tank body (1), the outside of the storage tank body (1) being fixedly connected to an inlet and outlet oil pipe (2), and the inside of the storage tank body (1) being provided with a floating roof (3), and a top cover (5) being fixedly installed on the top of the floating roof (3), characterized in that: A seat (6) is installed in a surrounding manner on the outside of the floating roof (3), and a sealing structure (4) is arranged on the outside of the seat (6); The sealing structure (4) comprises a filling bag (7) fixedly mounted on one side of the seat (6), a large compensation spring sheet (8) being attached to the outside of the filling bag (7), and a liquid level sensor (9) being arranged at the bottom end of the large compensation spring sheet (8); A plurality of groups of push rods (33) are fixedly mounted on the top of the seat (6), and a curved rod (34) is fixedly mounted on the top of each of the groups of push rods (33). The outside of the push rods (33) is fixedly connected to one end of a large compensation spring (8). An auxiliary mechanism (10) corresponding to the curved rod (34) is also provided on the inner wall of the storage tank body (1). The auxiliary mechanism (10) is used to assist the floating roof (3) in stably lifting and lowering inside the storage tank body (1). An adjusting device (12) is also provided at the bottom of the floating roof (3). The adjusting device (12) is electrically connected to the liquid level sensor (9). The adjusting device (12) is used to reduce the pressure of the floating roof (3) on the oil body.

2. The explosion-proof edge sealing device for an external floating roof storage tank according to claim 1, characterized in that: The auxiliary mechanism (10) comprises a plurality of fixed side seats (11) fixedly mounted on the inner wall of the storage tank body (1), a sliding hole (22) being provided inside the fixed side seat (11), a counterweight plate (23) being slidably mounted inside the sliding hole (22), a rotating rod (25) being rotatably mounted inside the counterweight plate (23), a rotating chuck (26) being fixedly mounted on one end of the rotating rod (25), a lever (27) being clamped on one side of the rotating chuck (26), the lever (27) being mounted on the fixed side seat (11), and a spring sheet (28) being attached to the outside of the lever (27); The other end of the rotating rod (25) is provided with a protection component (36), and the protection component (36) is connected to the adjustment device (12).

3. The explosion-proof edge sealing device for an external floating roof storage tank according to claim 1, characterized in that: The filling bag (7) is one of a high-pore mesh structure or a spherical structure, and the filling bag (7) is made of aluminum alloy.

4. The explosion-proof edge sealing device for an external floating roof storage tank according to claim 2, characterized in that: The counterweight plate (23) corresponds to the arc-shaped rod (34), and a slot (24) for accommodating the arc-shaped rod (34) is provided at the bottom end of the counterweight plate (23).

5. The explosion-proof edge sealing device for an external floating roof storage tank according to claim 2, characterized in that: The regulating device (12) comprises an annular jet pipe (13) fixedly mounted at the bottom end of the floating roof (3); the annular jet pipe (13) is externally fixedly connected to a plurality of groups of air outlet pipes (14); the air outlet pipes (14) penetrate the bottom of the seat (6); and the top end of the air outlet pipes (14) is fixedly connected to one of the outlet ends of an electric three-way valve (15); the inlet end of the electric three-way valve (15) is fixedly connected to a straight pipe (16); the other outlet end of the electric three-way valve (15) is fixedly connected to a jet pipe (21); the electric three-way valve (15) is electrically connected to a liquid level sensor (9); the straight pipe (16) penetrates the top of the seat (6); and the top end of the straight pipe (16) is fixedly connected to a telescopic pipe (17); An annular gas delivery pipe (20) is fixedly mounted on the outside of the storage tank body (1); a connecting pipe (19) is connected between the annular gas delivery pipe (20) and the storage tank body (1); a spring return ball valve (18) is provided between the connecting pipe (19) and the telescopic pipe (17); the spring return ball valve (18) is fixedly mounted on the inner wall of the storage tank body (1), and the spring return ball valve (18) is located on one side of the fixed side seat (11).

6. The explosion-proof barrier edge sealing device for an external floating roof storage tank according to claim 5, characterized in that: The interior of the annular gas delivery pipe (20) is filled with inert gas, the nozzle (21) is arranged at an angle, and the gas outlet of the nozzle (21) is arranged toward the filling bag (7).

7. The explosion-proof barrier edge sealing device for an external floating roof storage tank according to claim 5, characterized in that: A metal sheet (35) is fixedly mounted on the top end of the fixed side seat (11); the metal sheet (35) and the arc-shaped rod (34) are both elastic structures; the metal sheet (35) and the top rod (33) are arranged in correspondence with each other up and down.

8. The explosion-proof barrier edge sealing device for an external floating roof storage tank according to claim 5, characterized in that: The protection assembly (36) comprises a disc (29) fixedly mounted on the other end of the rotating rod (25), and a support rod (30) movably mounted on one side of the disc (29); A ratchet (31) is fixedly mounted on the valve stem of the spring return ball valve (18), the center of the ratchet (31) is movably connected to the other end of the support rod (30), the outer side of the ratchet (31) is meshed with a ratchet tooth (32), and the ratchet tooth (32) is movably mounted on one side of the support rod (30).

9. The barrier explosion-proof edge sealing device for an external floating roof storage tank according to claim 8, characterized in that: One end of the support rod (30) is connected to the disc (29) in an eccentric arrangement, and the support rod (30) is retractable.

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