Floating roof tank guide column sealing device and preparation method

Abstract

The invention discloses a floating roof tank guide column sealing device which comprises a sealing plate and a guide column. One end of the sealing plate is a floating disc, and the other end is an elastic plate; the elastic plate is annularly clung to the guide post, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product; the oil product is stored below the floating disc, and oil gas generated by the oil product is located between the floating disc and the oil product. According to the device, by means of the pressure effect of crude oil, gas existing above the oil product is sealed and does not leak outwards; the corresponding oil pressure and the height of the elastic plate are selected, so that the effects of saving the cost, reducing the oil gas loss and protecting the atmosphere are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of floating roof tank sealing, and in particular to a floating roof tank guide column sealing device and a preparation method thereof. Background Art

[0002] As my country's demand for oil continues to increase, the large-scale oil storage tanks have become an inevitable development trend. The top and wall of a general dome oil tank are welded and fixed. With the change of temperature and the rise and fall of the liquid level in the tank, air is often sucked into the tank and oil gas is exhaled out of the tank, which not only increases the loss of oil products, but also increases the risk of fire. In order to solve this problem, people have created floating roof oil tanks. The characteristics of a floating roof oil tank are that the tank top can float up and down, and the oil-resistant rubber sealing ring is used around it to press against the tank wall with a spring. The tank top is close to the oil surface. When the oil level rises, the tank top rises; when the oil level drops, the tank top drops. This type of oil tank does not need to be equipped with a respirator, which can greatly reduce the loss of oil products compared to a dome oil tank and is also safer. Therefore, floating roof tanks are currently the most commonly used form of large and medium-sized oil tanks at home and abroad.

[0003] During the use of floating roof tanks, ensuring that the oil does not volatilize and does not pollute the environment is an important aspect of safe storage of crude oil. Common methods and disadvantages are as follows: Mechanical components such as sealing rings and fillers may wear and age due to long-term friction and use, resulting in reduced sealing performance; liquid seals may fail due to liquid evaporation or leakage, requiring regular replenishment and maintenance; piston seals may generate friction when moving, increase energy consumption and cause wear of seals. Therefore, in order to ensure the safe and effective use of storage tanks, research on storage tank sealing devices is crucial. Summary of the invention

[0004] The purpose of the present invention is to provide a floating roof tank guide column sealing device and a preparation method. The device utilizes the pressure of crude oil itself to seal the gas above the oil product and prevent it from leaking. Through a large number of on-site practices, the present invention provides the corresponding selection of oil pressure and elastic plate height, thereby achieving the effects of saving costs, reducing oil and gas losses, and protecting the atmosphere.

[0005] To achieve the above object, the present invention provides a sealing device for a guide column of a floating roof tank, the sealing device comprising a sealing plate and a guide column;

[0006] One end of the sealing plate is a floating plate, and the other end is an elastic plate; the elastic plate is circumferentially attached to the guide column, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product; the oil product is stored below the floating plate, and the oil gas generated by the oil product is located between the floating plate and the oil product.

[0007] Optionally, the tube diameter of the guide column is 200-500 mm.

[0008] Optionally, the radius of the elastic plate is 10-30 mm larger than the radius of the guide column.

[0009] Optionally, the thickness of the elastic plate is 1-3 cm.

[0010] Optionally, the elastic force of the elastic plate is 98 N / m.

[0011] Optionally, a plurality of instruments are installed in the guide column, and the instruments include an oil meter, a temperature meter, and a liquid level meter.

[0012] Optionally, a vent hole is provided on the guide column.

[0013] The present invention also provides a method for preparing a sealing device, the method comprising:

[0014] Determine the height of the elastic plate according to the saturated vapor pressure of the oil product;

[0015] Select a sealing plate that meets the requirements according to the height of the elastic plate, wherein one end of the sealing plate is a floating plate and the other end is an elastic plate;

[0016] Place the elastic plate tightly against the guide column in an annular direction.

[0017] Optionally, the tube diameter of the guide column is 200-500 mm.

[0018] Optionally, the radius of the elastic plate is 10-30 mm larger than the radius of the guide column.

[0019] Technical effects and advantages of the present invention:

[0020] The present invention provides a sealing device for a guide column of a floating roof tank, the sealing device comprising a sealing plate and a guide column; one end of the sealing plate is a floating disk, and the other end is an elastic plate; the elastic plate is tightly attached to the guide column in an annular direction, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product; the oil product is stored below the floating disk, and the oil gas generated by the oil product is located between the floating disk and the oil product.

[0021] The beneficial effects of the device are as follows: 1. The present invention utilizes the physical properties of the oil itself to adopt sealing, which is safer and more effective, ensuring the safe operation of the storage tank. 2. The sealing device of the present invention is simpler and more reliable, and is convenient for production and installation. 3. It can be applied to floating roof storage tanks of various capacities, and has stronger versatility. 4. The present invention is obtained through a large number of experiments and experiences, and the results are more effective.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the structural diagram of the sealing device for the guide column of the floating roof tank;

[0024] Markings in the figure: 1 is the floating plate, 2 is the elastic plate, 3 is the guide column, 4 is the oil and gas leakage position, and h is the height of the elastic plate. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings provided by the present invention, and the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0027] In order to solve the sealing problem of the floating plate guide column of a floating roof tank, the present invention discloses a floating roof tank guide column sealing device, the sealing device comprises a sealing plate and a guide column; one end of the sealing plate is a floating plate, and the other end is an elastic plate; the elastic plate is tightly attached to the guide column in the circumferential direction, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product; the oil product is stored below the floating plate and the oil gas generated by the oil product is located between the floating plate and the oil product.

[0028] The elastic plate seal in the present invention usually has a lower friction coefficient, which can reduce friction and wear between sealing components, thereby extending the service life of the sealing element, and can adapt to the movement of the guide column because the elastic plate can bend and deform to a certain extent, thereby maintaining good sealing performance when the guide column moves. At the same time, the elastic plate seal has good adaptability and pressure response characteristics, and can provide a stable sealing effect under different pressure conditions, thereby reducing the risk of leakage.

[0029] In order to better explain this scheme, the following Figure 1A floating roof tank guide column sealing device is introduced in detail as follows:

[0030] The sealing device comprises a sealing plate and a guide column; one end of the sealing plate is a floating disk 1, and the other end is an elastic plate 2; the elastic plate 2 is tightly attached to the guide column 3 in an annular direction, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product.

[0031] It should be noted that the oil tea product (such as crude oil) is located below the floating plate 1, and the generated oil and gas are located above the crude oil. If the gas leaks, it will leak out from position 4. The present invention utilizes the pressure of the crude oil itself and the elastic force of the elastic plate to prevent the oil and gas from passing through the non-connected area between the elastic plate and the guide column, that is, the oil and gas leakage position 4 to leak into the atmosphere.

[0032] It should also be noted that the floating plate 1 and the elastic plate 2 are a whole, and the elastic plate 2 is tightly attached to the guide column 3 in an annular direction without welding points (there is no direct connection between the elastic plate and the guide column, but they are tightly attached by elasticity). The elastic plate 2 is made of imported materials and will not generate static electricity.

[0033] It should also be noted that the floating plate changes with the oil product level, but the oil product level will not change the height h of the elastic plate, and a sealed safe liquid level will always be formed. When the storage tank inputs and outputs oil products, it is beneficial for the long-term safe storage of crude oil without oil and gas leakage. That is, the maximum pressure point where the oil interface contacts the elastic plate is called the liquid level safety height. As long as the liquid level is not lower than this height, the oil and gas will not leak out.

[0034] It should also be noted that the present invention limits the size of the elastic plate 2, and the radius of the elastic plate is 10-30 mm larger than the radius of the guide column. Preferably, the radius of the elastic plate 2 is 20 mm larger than the radius of the guide column 3, the thickness of the elastic plate 2 is 2 cm, and the elastic force is 98 N / m.

[0035] It should also be noted that the tube diameter of the guide column 3 is 200㎜~500㎜. When multiple instruments need to be installed in the guide column 3 at the same time (such as the oil measuring port, liquid level gauge port and thermometer port are installed in one guide column 3), the guide column can be selected to be larger and a vent hole can be opened at the same time.

[0036] It should also be noted that the saturated vapor pressure of crude oil has a certain relationship with temperature. For the convenience of explanation, the empirical formulas of oil samples in some regions are given below:

[0037] Renqiu crude oil sample:

[0038] Victory crude oil sample:

[0039] Puyang crude oil sample:

[0040] Daqing crude oil sample:

[0041] Wherein, P represents the saturated vapor pressure, the unit is kPa; T represents the temperature, the unit is K.

[0042] The present invention utilizes the pressure of crude oil itself and the elastic force of the elastic plate to seal the gas in the space above the crude oil. Through a large number of field experiments, the following table uses the saturated vapor pressure at the crude oil storage temperature (3 to 5°C greater than the freezing point) to provide the common height dimensions of the elastic plate under different saturated vapor pressures, which is beneficial to cost saving.

[0043]

[0044] The present invention provides a sealing device for a guide column of a floating roof tank, the sealing device comprising a sealing plate and a guide column; one end of the sealing plate is a floating disk, and the other end is an elastic plate; the elastic plate is tightly attached to the guide column in an annular direction, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product; the oil product is stored below the floating disk, and the oil gas generated by the oil product is located between the floating disk and the oil product.

[0045] The beneficial effects of the device are as follows: 1. The present invention uses the oil product's own pressure to seal. When oil and gas escape, the vapor pressure must be satisfied to overcome the oil product's static pressure. In the elastic plate seal, the seal is not achieved by directly applying pressure to the seal, but the oil product's own pressure is used to produce the sealing effect. Specifically, the elastic plate seal creates a contact surface between the guide column and the tank body. When the oil product pressure is applied to this contact surface, the elastic plate will deform and fill the gap between the guide column and the tank body, thereby achieving sealing. This design is safer and more effective because it does not require additional external pressure, but uses the natural pressure of the oil product to maintain the seal, thereby ensuring the safety of the storage tank during operation. 2. The sealing device of the present invention is simpler and more reliable, and is easy to produce and install. The elastic plate seal is a relatively simple design. It does not require a complex mechanical structure or liquid filling, and only requires an elastic plate between the guide column and the tank body. Due to the relatively simple structure, the reliability of the sealing device is relatively high, reducing potential failure points caused by complex structures. This simplicity also makes the production and installation process more convenient, thereby reducing costs and operating difficulties. 3. It can be applied to floating roof tanks of various capacities, and has greater versatility. The design principle of the elastic plate seal can be applied to floating roof tanks of different capacities because it is based on the pressure of the oil product to achieve sealing, rather than relying on a specific sealing structure. This enhances the versatility of this sealing method, allowing it to be used in tanks of various sizes and types, regardless of their capacity. 4. After a large number of experiments and rich experience, the present invention has studied the relationship between the height of the spring plate between the vapor pressure and the oil product pressure during the oil and gas escape process, thereby achieving more significant results.

[0046] The present invention also provides a method for preparing a sealing device, the method comprising: determining the height of the elastic plate according to the saturated vapor pressure of the oil product; selecting a sealing plate that meets the requirements according to the height of the elastic plate, wherein one end of the sealing plate is a floating plate and the other end is an elastic plate; placing the elastic plate in a circular manner close to the guide column;

[0047] It should be noted that the oil tea product (such as crude oil) is located below the floating plate 1, and the generated oil and gas are located above the crude oil. If the gas leaks, it will leak out from position 4. The present invention utilizes the pressure of the crude oil itself and the elastic force of the elastic plate to prevent the oil and gas from passing through the non-connected area between the elastic plate and the guide column, that is, the oil and gas leakage position 4 to leak into the atmosphere.

[0048] It should also be noted that the floating plate 1 and the elastic plate 2 are integrally formed, and the elastic plate 2 is closely attached to the guide column 3 in the circumferential direction without any welding points. The elastic plate 2 is made of imported materials and does not generate static electricity.

[0049] It should also be noted that the floating plate changes with the oil product level, but the oil product level will not change the height h of the elastic plate, and a sealed safe liquid level will always be formed. When the storage tank inputs and outputs oil products, it is beneficial for the long-term safe storage of crude oil and oil and gas without leakage.

[0050] It should also be noted that the present invention limits the size of the elastic plate 2, such as the radius of the elastic plate 2 is 20 mm greater than the radius of the guide column 3, the thickness of the elastic plate 2 is 2 cm, and the elastic force is 98 N / m.

[0051] It should also be noted that the tube diameter of the guide column 3 is 200㎜~500㎜. When multiple instruments need to be installed in the guide column 3 at the same time (such as the oil measuring port, liquid level gauge port and thermometer port are installed in one guide column 3), the guide column can be selected to be larger and a vent hole can be opened at the same time.

[0052] It should also be noted that the saturated vapor pressure of crude oil has a certain relationship with temperature. For the convenience of explanation, the empirical formulas of oil samples in some regions are given below:

[0053] Renqiu crude oil sample:

[0054] Victory crude oil sample:

[0055] Puyang crude oil sample:

[0056] Daqing crude oil sample:

[0057] Wherein, P represents the saturated vapor pressure, the unit is kPa; T represents the temperature, the unit is K.

[0058] The present invention utilizes the pressure of crude oil itself and the elastic force of the elastic plate to seal the gas in the space above the crude oil. Through a large number of field experiments, the following table uses the saturated vapor pressure at the crude oil storage temperature (3 to 5°C greater than the freezing point) to provide the common height dimensions of the elastic plate under different saturated vapor pressures, which is beneficial to cost saving.

[0059]

[0060] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A floating roof tank guide column sealing device, characterized in that: The sealing device comprises a sealing plate and a guide column; One end of the sealing plate is a floating plate, and the other end is an elastic plate; the elastic plate is circumferentially attached to the guide column, and the height of the elastic plate is determined by the saturated vapor pressure of the oil product; the oil product is stored below the floating plate, and the oil gas generated by the oil product is located between the floating plate and the oil product.

2. The floating roof tank guide column sealing device according to claim 1, characterized in that: The tube diameter of the guide column is 200-500 mm.

3. The floating roof tank guide column sealing device according to claim 1, characterized in that: The radius of the elastic plate is 10-30 mm larger than the radius of the guide column.

4. The floating roof tank guide column sealing device according to claim 1, characterized in that: The thickness of the elastic plate is 1-3 cm.

5. The floating roof tank guide column sealing device according to claim 1, characterized in that: The elastic force of the elastic plate is 98N / m.

6. The floating roof tank guide column sealing device according to claim 1, characterized in that: A plurality of instruments are installed in the guide column, and the instruments include an oil meter, a temperature meter, and a liquid level meter.

7. The floating roof tank guide column sealing device according to claim 1, characterized in that: A vent hole is provided on the guide column.

8. A method for preparing a sealing device according to any one of claims 1 to 7, characterized in that: The method comprises: Determine the height of the elastic plate according to the saturated vapor pressure of the oil product; Select a sealing plate that meets the requirements according to the height of the elastic plate, one end of the sealing plate is a floating plate, and the other end is an elastic plate; Place the elastic plate tightly against the guide column in an annular direction.

9. The preparation method according to claim 8, characterized in that: The tube diameter of the guide column is 200-500 mm.

10. The preparation method according to claim 8, characterized in that: The radius of the elastic plate is 10-30 mm larger than the radius of the guide column.

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