A floating roof oil tank no oil and gas emergency drainage device and oil storage tank

Abstract

The utility model provides an emergency drainage device for a floating roof oil tank without oil and gas and an oil storage tank. An emergency drainage device for a floating roof oil tank without oil and gas comprises: a water collecting and filtering device, a water seal cylinder, a flow guide device, and at least one anti-reverse liquid device. The bottom of the flow guide device and the anti-reverse liquid device are both connected to the water seal cylinder, and the water collecting and filtering device is installed on the top of the flow guide device. When the central drain pipe is blocked or leaking oil and cannot be used, the overloaded accumulated water flows into the drain pipe of the emergency drain device through the water collecting and filtering device, and the device enters an emergency drainage state to avoid a shipwreck accident. While draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder to ensure the discharge of rainwater. The anti-reverse liquid device is beneficial to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder. While meeting the emergency drainage function, it prevents the oil stored in the tank from entering the water seal cylinder, isolates the oil and gas from the environment in the water seal cylinder, and avoids excessive oil and gas emissions.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency drainage equipment, in particular to an emergency drainage device for a floating roof oil tank without oil or gas and an oil storage tank. Background Art

[0002] At present, oil storage tanks are mainly divided into floating roof tanks and dome roof tanks, and floating roof tanks are further divided into internal floating roof and external floating roof.

[0003] The top of the external floating roof oil storage tank is equipped with a central drainage device and an emergency drainage device. Normally, rainwater or water accumulated on the top is discharged to the outside of the tank through the central drainage device along the drainage pipeline. If the central drainage device is blocked inside, or there is a rainstorm or a short period of increased precipitation, the central drainage device is limited by its own drainage capacity, resulting in the inability to discharge the accumulated water out of the tank in time, which is prone to shipwreck accidents. The emergency drainage device is used to discharge the water accumulated on the top of the floating ship into the storage tank when the central drainage device fails.

[0004] The existing patent "CN202220524978.8-A closed emergency drainage device for a floating roof oil tank" discloses a closed emergency drainage device for a floating roof oil tank including a water collecting device, a water seal cylinder and a water seal groove. The water collecting device is fixed on the upper part of the water seal cylinder, and contains a tank body, a valve ball and a filter device. The filter device is inside the water collecting device, and the valve ball is at the bottom of the water collecting device. The water seal cylinder contains a float, and the water seal groove contains a body, a top cover and a single-flow device, wherein the single-flow device is fixed on the top cover. The oil body is isolated from the liquid in the water seal cylinder by opening and closing the single-flow device to ensure the sealing effect.

[0005] Conventional emergency drainage devices usually consist of a diversion vertical pipe, a water seal cylinder, a float and an overflow port. The overflow port is designed at the top of the water seal cylinder. The oil in the oil tank easily flows into the water seal cylinder through the overflow port. Long-term contact will cause wax to form in the water seal cylinder, which will affect the emergency drainage effect and reduce the drainage efficiency. Secondly, the oil in the water seal cylinder will volatilize due to high temperature, resulting in oil and water mixing, which will also cause the emergency drainage device to fail. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an oil and gas-free emergency drainage device for a floating roof oil tank and an oil storage tank in view of the deficiencies in the prior art.

[0007] The utility model provides a technical solution to the above-mentioned technical problems as follows: an emergency drainage device for a floating roof oil tank without oil or gas, comprising: a water collecting and filtering device, a water seal cylinder, a flow guide device, and at least one anti-liquid backflow device, wherein the bottom of the flow guide device and the anti-liquid backflow device are both connected to the water seal cylinder, and the water collecting and filtering device is installed on the top of the flow guide device.

[0008] The beneficial effect of adopting the technical solution of the utility model is that when the central drain pipe is blocked or leaking and cannot be used, the overloaded water flows into the drain pipe of the emergency drain device through the water collection and filtration device, and the device enters the emergency drainage state to avoid the occurrence of shipwreck accidents. While draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder, ensuring the discharge of rainwater. The anti-liquid backflow device is conducive to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder. While meeting the emergency drainage function, it prevents the oil stored in the tank from entering the water seal cylinder, isolates the oil and gas from the environment in the water seal cylinder, and avoids excessive oil and gas emissions.

[0009] Furthermore, the diversion device includes: a connecting pipe, a diversion core tube, and a disc-shaped float. The connecting pipe is sleeved on the outside of the diversion core, the disc-shaped float is installed in the diversion core tube, and the bottom end of the diversion device is located in the water seal tube. The distance between the bottom end of the diversion device and the bottom end of the water seal tube is 150 mm.

[0010] The beneficial effect of adopting the above further technical solution is: when the central drain pipe is blocked or leaking and cannot be used, the overloaded accumulated water flows into the drain pipe of the emergency drain device through the filter screen of the water collection and filtration device. The impact force of the water is used to flip the disc-shaped float, and the device enters the emergency drainage state to avoid shipwreck accidents. The disc-shaped float can be flipped under the impact of the water flow, and the normal disc-shaped float has a sealing effect on the water seal cylinder. The disc-shaped float floats on the inner tube of the guide core tube to reduce water vapor evaporation. When encountering an emergency drainage situation, the accumulated water exceeds the water collection and filtration device and is injected into the guide core tube. The impact of the water flow causes the disc-shaped float to flip and then enter the water seal cylinder. Due to the upper and lower pressure differences, the water is discharged into the tank through the outlet of the anti-backflow device. After the drainage is completed, since the cylinder is still full of water, the water seal principle can prevent oil from backflowing.

[0011] Furthermore, an opening is provided at the bottom of the water collecting and filtering device, and the water collecting and filtering device is installed on the top of the guide device through a sealing flange and a sealing rubber ring. A handle is provided on the top of the water collecting and filtering device, and a floating roof upper surface and a reinforcing plate are provided on the outside of the guide device. The floating roof upper surface is located above the reinforcing plate, and the distance between the bottom end of the water collecting and filtering device and the floating roof upper surface is 100 mm.

[0012] The beneficial effects of adopting the above further technical solution are: the provision of the flange and the sealing rubber ring facilitates the sealed connection between the water collecting and filtering device and the flow guiding device, thereby improving the sealing performance. The provision of the handle facilitates the taking and placing of the water collecting and filtering device.

[0013] Furthermore, the water seal cylinder includes a water seal cylinder body and a water seal cylinder top cover, the water seal cylinder top cover is provided with an opening, one end of the anti-backflow device passes through the opening of the water seal cylinder top cover and is connected to the water seal cylinder, and the other end of the anti-backflow device is provided with a water trap.

[0014] The beneficial effect of adopting the above further technical solution is that the steam trap is provided to block steam and drain water.

[0015] Furthermore, the number of the anti-return liquid devices is 6, the 6 anti-return liquid devices are arranged around the water seal tube, and the anti-return liquid device is an "X"-shaped anti-return liquid bent pipe.

[0016] The beneficial effect of adopting the above further technical solution is that: while draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder, and ensure that the anti-return liquid device itself is designed in a "J" shape after the rainwater is drained, which is conducive to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder, avoiding excessive oil and gas emissions. By taking advantage of the fact that the density of oil is lower than that of water, the anti-return liquid device is kept full of water, and the water seal principle is used to prevent the oil from overflowing into the water seal cylinder.

[0017] Furthermore, a drainage hole is provided at the bottom of the water seal cylinder, and a drain plug is provided in the drainage hole.

[0018] The beneficial effect of adopting the above further technical solution is that: a drainage hole is provided at the bottom of the water seal cylinder, which is convenient for drainage operation during maintenance, and the water accumulated in the cylinder can be quickly drained through the bottom drainage hole during maintenance. It is isolated from the outside world by a screw plug.

[0019] Furthermore, the anti-rebound liquid device is made of 304 stainless steel, the diameter of the anti-rebound liquid device is 76 mm, and the anti-rebound liquid device is connected to the outer side of the water seal cylinder through a fixed bracket.

[0020] The beneficial effect of adopting the above further technical solution is: using 304 stainless steel to improve corrosion resistance and extend the service life of the entire device.

[0021] Furthermore, the anti-backflow device includes: a first U-shaped tube, a second U-shaped tube and a third U-shaped tube, the first U-shaped tube is located in the water seal cylinder, one end of the first U-shaped tube is connected to the water seal cylinder, one end of the second U-shaped tube passes through the water seal cylinder and is connected to the other end of the first U-shaped tube through a flange, the third U-shaped tube is located on the outside of the water seal cylinder, and one end of the third U-shaped tube is connected to the other end of the second U-shaped tube through a flange.

[0022] The beneficial effect of adopting the above further technical solution is: utilizing the property that the density of oil is lower than that of water, the anti-return liquid device is kept full of water, and utilizing the water seal principle, thereby preventing the oil from overflowing into the water seal cylinder. The split assembly is convenient and fast, and can be reused.

[0023] Furthermore, the distance between the lowest point of the first U-shaped tube and the bottom end of the water seal cylinder is 50 mm, and the distance between the lowest point of the third U-shaped tube and the bottom end of the water seal cylinder is 20 mm.

[0024] The beneficial effect of adopting the above further technical solution is: utilizing the property that the density of oil is lower than the density of water to keep the anti-return liquid device full of water, and utilizing the water seal principle to prevent the oil from overflowing into the water seal cylinder.

[0025] In addition, the utility model also provides an oil storage tank, comprising any one of the above-mentioned floating roof oil tank oil gas-free emergency drainage devices.

[0026] The beneficial effect of adopting the technical solution of the utility model is that when the central drain pipe is blocked or leaking and cannot be used, the overloaded water flows into the drain pipe of the emergency drain device through the water collection and filtration device, and the device enters the emergency drainage state to avoid the occurrence of shipwreck accidents. While draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder, ensuring the discharge of rainwater. The anti-liquid backflow device is conducive to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder. While meeting the emergency drainage function, it prevents the oil stored in the tank from entering the water seal cylinder, isolates the oil and gas from the environment in the water seal cylinder, and avoids excessive oil and gas emissions.

[0027] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the structural schematic diagrams of the oil-free and gas-free emergency drainage device for a floating roof oil tank provided in an embodiment of the utility model.

[0029] Figure 2 The second structural schematic diagram of the oil and gas emergency drainage device for the floating roof oil tank provided in the embodiment of the utility model.

[0030] Figure 3 The third structural schematic diagram of the oil and gas emergency drainage device for the floating roof oil tank provided in the embodiment of the utility model.

[0031] Explanation of the accompanying drawings: 1. Handle; 2. Water collecting and filtering device; 3. Sealing flange; 4. Sealing rubber ring; 5. Upper surface of floating roof; 6. Reinforcement plate; 7. Disc float; 8. Anti-backflow device; 81. First U-shaped tube; 82. Second U-shaped tube; 83. Third U-shaped tube; 9. Steam trap; 10. Top cover of water seal cylinder; 11. Fixed bracket; 12. Water seal cylinder. DETAILED DESCRIPTION

[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0033] like Figures 1 to 3As shown, the utility model provides an emergency drainage device for a floating roof oil tank without oil and gas, comprising: a water collecting and filtering device 2, a water seal cylinder 12, a guide device, and at least one anti-return liquid device 8, the bottom of the guide device and the anti-return liquid device 8 are both connected to the water seal cylinder 12, and the water collecting and filtering device 2 is installed on the top of the guide device.

[0034] The beneficial effect of adopting the technical solution of the utility model is that when the central drain pipe is blocked or leaking and cannot be used, the overloaded water flows into the drain pipe of the emergency drain device through the water collection and filtration device, and the device enters the emergency drainage state to avoid the occurrence of shipwreck accidents. While draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder, ensuring the discharge of rainwater. The anti-liquid backflow device is conducive to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder. While meeting the emergency drainage function, it prevents the oil stored in the tank from entering the water seal cylinder, isolates the oil and gas from the environment in the water seal cylinder, and avoids excessive oil and gas emissions.

[0035] The utility model provides a floating roof oil tank oil tank without oil and gas emergency drainage device, which can be a large floating roof oil tank emergency drainage device, used on the floating roof of a large floating roof oil tank, and specifically can be designed for an external floating roof oil storage tank. When the central drainage pipe is blocked or leaking oil and cannot be used, the overloaded water flows into the drainage pipe of the emergency drainage device through the filter screen (filter screen of the water collection and filtering device), and the disc-shaped float is turned over by the impact force of the water, and the device enters an emergency drainage state to avoid the occurrence of a shipwreck accident. The utility model is composed of a water collection and filtering device, a sealing system (sealing flange and sealing rubber ring), a diversion device, a disc-shaped float, an anti-reverse liquid device, a water seal groove (water seal cylinder 12), a flange and bolts and other parts. The water collection and filtering device is provided with an opening at the bottom, and is connected to the diversion device through a flange (sealing flange) and a sealing element (sealing rubber ring), and the disc-shaped float is located inside the diversion device. The water seal cylinder includes a body (water seal cylinder body) and an upper cover (water seal cylinder top cover), and the anti-reverse liquid device is fixed to the water seal cylinder upper cover (water seal cylinder top cover). The utility model can effectively prevent crude oil in the tank (oil storage tank) from entering the water seal cylinder during emergency drainage, ensuring that after rainwater is discharged, the anti-return liquid pipe (anti-return liquid device) itself has an "X"-shaped design, which is conducive to the liquid pressure in the cylinder (water seal cylinder) to isolate the oil from the cylinder (water seal cylinder), thereby avoiding excessive oil and gas emissions.

[0036] The large floating roof oil tank no oil and gas emergency drainage device (floating roof oil tank no oil and gas emergency drainage device) provided by the embodiment of the utility model includes a water collecting and filtering device, a water seal cylinder, a flow guiding device, a backflow prevention device, etc. The water collecting and filtering device is fixed on the upper part of the water seal cylinder, and the two are connected by the flow guiding device. An opening is provided on the top cover of the water seal cylinder, and the backflow prevention device extends from the inside of the water seal cylinder through the opening, and a drain plug (wire plug) is provided at the bottom of the water seal cylinder.

[0037] The diversion device includes a connecting pipe, a diversion core pipe, a disc-shaped buoyancy ball (disc-shaped float) and a seal (sealing rubber ring). The connecting pipe and the diversion core pipe are sleeved together, with a seal (sealing rubber ring) on ​​the top and connected to the water collection device with a flange (sealing flange), the lower parts of the two extend into the water seal cylinder, and the disc-shaped buoyancy ball (disc-shaped float) is placed inside the diversion core pipe.

[0038] The bottom of the water collecting and filtering device is provided with an opening and is connected to the flow guiding device through a flange (sealing flange), and a handle is arranged on the top.

[0039] The anti-reverse liquid device comprises an anti-reverse liquid guide pipe and a water diffuser (drain trap), wherein the anti-reverse liquid guide pipe is connected by a flange, and the water diffuser (drain trap) is fixed at the outer opening of the anti-reverse liquid guide pipe.

[0040] like Figures 1 to 3 As shown, further, the diversion device includes: a connecting pipe, a diversion core tube, and a disc-shaped float 7. The connecting pipe is sleeved on the outside of the diversion core, and the disc-shaped float 7 is installed in the diversion core tube. The bottom end of the diversion device is located in the water seal tube 12, and the distance between the bottom end of the diversion device and the bottom end of the water seal tube 12 is 150 mm.

[0041] The beneficial effect of adopting the above further technical solution is: when the central drain pipe is blocked or leaking and cannot be used, the overloaded accumulated water flows into the drain pipe of the emergency drain device through the filter screen of the water collection and filtration device. The impact force of the water is used to flip the disc-shaped float, and the device enters the emergency drainage state to avoid shipwreck accidents. The disc-shaped float can be flipped under the impact of the water flow, and the normal disc-shaped float has a sealing effect on the water seal cylinder. The disc-shaped float floats on the inner tube of the guide core tube to reduce water vapor evaporation. When encountering an emergency drainage situation, the accumulated water exceeds the water collection and filtration device and is injected into the guide core tube. The impact of the water flow causes the disc-shaped float to flip and then enter the water seal cylinder. Due to the upper and lower pressure differences, the water is discharged into the tank through the outlet of the anti-backflow device. After the drainage is completed, since the cylinder is still full of water, the water seal principle can prevent oil from backflowing.

[0042] like Figures 1 to 3 As shown, further, an opening is provided at the bottom of the water collecting and filtering device 2, and the water collecting and filtering device 2 is installed on the top of the guide device through a sealing flange 3 and a sealing rubber ring 4. A handle 1 is provided on the top of the water collecting and filtering device 2, and a floating roof upper surface 5 and a reinforcing plate 6 are provided on the outer side of the guide device. The floating roof upper surface 5 is located above the reinforcing plate 6, and the distance between the bottom end of the water collecting and filtering device 2 and the floating roof upper surface 5 is 100 mm.

[0043] The beneficial effects of adopting the above further technical solution are: the provision of the flange and the sealing rubber ring facilitates the sealed connection between the water collecting and filtering device and the flow guiding device, thereby improving the sealing performance. The provision of the handle facilitates the taking and placing of the water collecting and filtering device.

[0044] like Figures 1 to 3 As shown, further, the water seal cylinder 12 includes a water seal cylinder body and a water seal cylinder top cover 10, the water seal cylinder top cover 10 is provided with an opening, one end of the anti-backflow device 8 passes through the opening of the water seal cylinder top cover 10 and is connected to the water seal cylinder 12, and the other end of the anti-backflow device 8 is provided with a steam trap 9.

[0045] The beneficial effect of adopting the above further technical solution is that the steam trap is provided to block steam and drain water.

[0046] like Figures 1 to 3 As shown, further, the number of the anti-return liquid devices 8 is 6, and the 6 anti-return liquid devices 8 are arranged around the water seal tube 12, and the anti-return liquid devices 8 are "X"-shaped anti-return liquid bent pipes.

[0047] The beneficial effect of adopting the above further technical solution is that: while draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder, and ensure that the anti-return liquid device itself is designed in a "J" shape after the rainwater is drained, which is conducive to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder, avoiding excessive oil and gas emissions. By taking advantage of the fact that the density of oil is lower than that of water, the anti-return liquid device is kept full of water, and the water seal principle is used to prevent the oil from overflowing into the water seal cylinder.

[0048] Furthermore, a drainage hole is provided at the bottom of the water seal tube 12, and a drain plug is provided in the drainage hole.

[0049] The beneficial effect of adopting the above further technical solution is that: a drainage hole is provided at the bottom of the water seal cylinder, which is convenient for drainage operation during maintenance, and the water accumulated in the cylinder can be quickly drained through the bottom drainage hole during maintenance. It is isolated from the outside world by a screw plug.

[0050] like Figures 1 to 3 As shown, further, the material of the anti-return liquid device 8 is 304 stainless steel, the diameter of the anti-return liquid device 8 is 76 mm, and the anti-return liquid device 8 is connected to the outer side of the water seal tube 12 through a fixed bracket 11.

[0051] The beneficial effect of adopting the above further technical solution is: using 304 stainless steel to improve corrosion resistance and extend the service life of the entire device.

[0052] like Figures 1 to 3As shown, further, the anti-backflow device 8 includes: a first U-shaped tube 81, a second U-shaped tube 82 and a third U-shaped tube 83, the first U-shaped tube 81 is located in the water seal cylinder 12, one end of the first U-shaped tube 81 is connected to the water seal cylinder 12, one end of the second U-shaped tube 82 passes through the water seal cylinder 12 and is connected to the other end of the first U-shaped tube 81 through a flange, the third U-shaped tube 83 is located on the outside of the water seal cylinder 12, and one end of the third U-shaped tube 83 is connected to the other end of the second U-shaped tube 82 through a flange.

[0053] The beneficial effect of adopting the above further technical solution is: utilizing the property that the density of oil is lower than that of water, the anti-return liquid device is kept full of water, and utilizing the water seal principle, thereby preventing the oil from overflowing into the water seal cylinder. The split assembly is convenient and fast, and can be reused.

[0054] The second U-shaped tube 82 is inverted.

[0055] like Figures 1 to 3 As shown, further, the distance between the lowest point of the first U-shaped tube 81 and the bottom end of the water seal tube 12 is 50 mm, and the distance between the lowest point of the third U-shaped tube 83 and the bottom end of the water seal tube 12 is 20 mm.

[0056] The beneficial effect of adopting the above further technical solution is: utilizing the property that the density of oil is lower than the density of water to keep the anti-return liquid device full of water, and utilizing the water seal principle to prevent the oil from overflowing into the water seal cylinder.

[0057] The embodiment of the utility model provides a large floating roof oil tank without oil and gas emergency drainage device (floating roof oil tank without oil and gas emergency drainage device), which can prevent the oil stored in the tank (oil storage tank) from entering the water seal cylinder while meeting the emergency drainage function, and isolate the oil and gas from the environment inside the water seal cylinder. The device (floating roof oil tank without oil and gas emergency drainage device) is made of 304 stainless steel, which can increase the service life of the device as a whole. The bottom of the water seal cylinder is provided with a drainage hole to facilitate drainage operations during maintenance.

[0058] The utility model provides a large floating roof oil tank without oil and gas emergency drainage device (floating roof oil tank without oil and gas emergency drainage device), which includes a water collecting and filtering device, a water seal cylinder, a flow guiding device, and a backflow prevention device. The water collecting and filtering device is fixed on the upper part of the water seal cylinder, and the two are connected by the flow guiding device. An opening is provided on the top cover of the water seal cylinder, and the backflow prevention device extends from the inside of the water seal cylinder through the opening. A drain plug (wire plug) is provided at the bottom of the water seal cylinder.

[0059] The anti-reverse liquid device includes 6 double U-shaped anti-reverse liquid elbows, flanges, bolts and nuts, and a diffuser cover (drain). The 6 double U-shaped anti-reverse liquid elbows are composed of separate parts and connected by flanges. Taking advantage of the fact that the density of oil is lower than that of water, the anti-reverse liquid elbow (anti-reverse liquid device) is kept full of water, and the water seal principle is used to prevent the oil from overflowing into the water seal cylinder.

[0060] Furthermore, the flow guide device comprises a flow guide core tube, a connecting tube and a disc-shaped float, wherein the flow guide core tube and the connecting tube are sleeved together, and the disc-shaped float is placed inside the flow guide core tube. The disc-shaped float can flip under the impact of water flow, and the disc-shaped float usually has a sealing effect on the water seal cylinder. The upper end of the flow guide device is connected to the water collection and filtering device through a sealing rubber ring, and the lower end extends into the water seal barrel (water seal cylinder) and is fixed.

[0061] Furthermore, an opening is provided at the bottom of the water collecting and filtering device and a sealing member (sealing rubber ring) is installed.

[0062] Furthermore, a handle is arranged on the top of the water collecting and filtering device.

[0063] Furthermore, a drainage hole is provided at the bottom of the water seal cylinder and is isolated from the outside world by a screw plug.

[0064] Furthermore, the entire device is made of 304 stainless steel.

[0065] The working principle of the device described in the utility model:

[0066] The device (floating roof oil tank emergency drainage device without oil and gas) is placed in the oil storage tank under normal conditions. The water seal cylinder and the anti-return liquid device are placed in the oil storage tank. The interior is filled with water to prevent the oil from overflowing into the water seal cylinder through the water seal principle. The disc-shaped float floats on the inner tube of the guide core tube to reduce water vapor evaporation. When encountering an emergency drainage situation, the accumulated water exceeds the water collection and filtration device and is injected into the guide core tube after filtration. The impact of the water flow causes the disc-shaped float to flip and then enter the water seal cylinder. Due to the upper and lower pressure differences, the water is discharged into the tank through the outlet of the anti-return liquid device. After the drainage is completed, since the cylinder (water seal cylinder) is still full of water, the water seal principle can prevent the oil from flowing back.

[0067] Compared with the prior art, the utility model has the following advantages:

[0068] 1) The device of the utility model utilizes the water seal principle to prevent oil from flowing back into the water seal cylinder, thus avoiding wax deposition in the water seal cylinder that causes emergency drainage failure. At the same time, the water accumulated in the cylinder can be quickly drained through the bottom drainage hole during maintenance.

[0069] 2) The device of the utility model is made of 304 stainless steel as a whole, has strong corrosion resistance, can be assembled in parts, is convenient and fast, and can be reused.

[0070] like Figure 1 and Figure 2As shown, the oil-free and gas-free emergency drainage device (floating roof oil tank oil-free and gas-free emergency drainage device) includes a water seal cylinder 12, wherein the upper part of the guide device is connected to the water collecting and filtering device 2 through a sealing flange 3 and a sealing rubber ring 4, and the lower part extends into the water seal cylinder, 150 mm away from the bottom of the cylinder (water seal cylinder), and a disc-shaped float 7 is placed inside the guide device.

[0071] like Figure 1 As shown, a handle 1 is welded on the water collecting and filtering device 2, and the bottom end is installed 100 mm away from the upper surface of the floating roof.

[0072] like Figure 2 As shown, the six anti-reverse liquid bends (anti-reverse liquid devices) are made of 304 stainless steel, with a diameter of 76 mm, and are connected in parts by flanges. A portion of the anti-reverse liquid bend (anti-reverse liquid device) extends into the water seal cylinder, with the lowest point being 50 mm from the bottom of the cylinder (water seal cylinder), and the outlet in the cylinder being 250 mm from the bottom of the cylinder (water seal cylinder). The other portion extends out of the water seal cylinder and is fixed to the water seal cylinder by a fixing bracket 11, with the lowest point of this portion being 20 mm from the bottom of the water seal cylinder.

[0073] like Figure 1 As shown, a steam trap 9 is installed above the external water outlet of the anti-reverse liquid bent pipe, and the steam trap 9 is 60 mm away from the water outlet.

[0074] like Figure 1 As shown, a thread plug with a diameter of 25 mm is installed at the bottom of the water seal cylinder, and the center of the thread plug is 32.5 mm away from the bottom of the cylinder.

[0075] In addition, the utility model also provides an oil storage tank, comprising any one of the above-mentioned floating roof oil tank oil gas-free emergency drainage devices.

[0076] The beneficial effect of adopting the technical solution of the utility model is that when the central drain pipe is blocked or leaking and cannot be used, the overloaded water flows into the drain pipe of the emergency drain device through the water collection and filtration device, and the device enters the emergency drainage state to avoid the occurrence of shipwreck accidents. While draining water in an emergency, it can effectively prevent the crude oil in the oil storage tank from entering the water seal cylinder, ensuring the discharge of rainwater. The anti-liquid backflow device is conducive to the liquid pressure in the water seal cylinder to isolate the oil from the water seal cylinder. While meeting the emergency drainage function, it prevents the oil stored in the tank from entering the water seal cylinder, isolates the oil and gas from the environment in the water seal cylinder, and avoids excessive oil and gas emissions.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A floating roof oil tank oil tank no oil and gas emergency drainage device, characterized in that: include: A water collecting and filtering device, a water seal cylinder, a flow guiding device, and at least one anti-return liquid device. The bottom of the flow guiding device and the anti-return liquid device are both connected to the water seal cylinder, and the water collecting and filtering device is installed on the top of the flow guiding device.

2. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: The flow guide device includes: a connecting pipe, a flow guide core tube, and a disc-shaped float. The connecting pipe is sleeved on the outside of the flow guide core, and the disc-shaped float is installed in the flow guide core tube. The bottom end of the flow guide device is located in the water seal tube, and the distance between the bottom end of the flow guide device and the bottom end of the water seal tube is 150 mm.

3. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: An opening is provided at the bottom of the water collecting and filtering device, and the water collecting and filtering device is installed on the top of the guide device through a sealing flange and a sealing rubber ring. A handle is provided on the top of the water collecting and filtering device, and a floating roof upper surface and a reinforcing plate are provided on the outside of the guide device. The floating roof upper surface is located above the reinforcing plate, and the distance between the bottom end of the water collecting and filtering device and the floating roof upper surface is 100 mm.

4. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: The water seal cylinder comprises a water seal cylinder body and a water seal cylinder top cover, the water seal cylinder top cover is provided with an opening, one end of the anti-return liquid device passes through the opening of the water seal cylinder top cover and is connected to the water seal cylinder, and the other end of the anti-return liquid device is provided with a water trap.

5. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: The number of the anti-rebound liquid devices is 6, and the 6 anti-rebound liquid devices are arranged around the water seal tube. The anti-rebound liquid devices are "X"-shaped anti-rebound liquid bent pipes.

6. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: A drainage hole is arranged at the bottom of the water seal cylinder, and a drain plug is arranged in the drainage hole.

7. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: The anti-return liquid device is made of 304 stainless steel, the diameter of the anti-return liquid device is 76 mm, and the anti-return liquid device is connected to the outer side of the water seal cylinder through a fixed bracket.

8. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 1, characterized in that: The anti-backflow device includes: a first U-shaped tube, a second U-shaped tube and a third U-shaped tube, the first U-shaped tube is located in the water seal cylinder, one end of the first U-shaped tube is connected to the water seal cylinder, one end of the second U-shaped tube passes through the water seal cylinder and is connected to the other end of the first U-shaped tube through a flange, the third U-shaped tube is located outside the water seal cylinder, and one end of the third U-shaped tube is connected to the other end of the second U-shaped tube through a flange.

9. The floating roof oil tank oil tank oil and gas emergency drainage device according to claim 8, characterized in that: The distance between the lowest point of the first U-shaped tube and the bottom end of the water seal cylinder is 50 mm, and the distance between the lowest point of the third U-shaped tube and the bottom end of the water seal cylinder is 20 mm.

10. An oil storage tank, characterized in that: The invention comprises an emergency drainage device for a floating roof oil tank without oil or gas as described in any one of claims 1 to 9.

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