Sealing and paraffin scraping integrated inner floating disc and floating roof oil storage tank

Abstract

The invention provides a sealing and paraffin scraping integrated inner floating disc and a floating roof oil storage tank, and the inner floating disc comprises a floating disc body which is provided with a containing groove formed in the side part of the floating disc body; the wax scraping mechanisms are located below the floating disc body in the circumferential direction of the floating disc body, and any wax scraping mechanism comprises a connecting rod assembly rotationally connected with the bottom wall of the floating disc body, a balance weight piece and a scraping plate, and the balance weight piece and the scraping plate are arranged at the two ends of the connecting rod assembly; the sealing mechanism comprises an electromagnetic sealing assembly arranged on the periphery of the floating disc body, and the electromagnetic sealing assembly is provided with magnetic fluid located in the containing groove and an electromagnetic unit arranged above the floating disc body; wherein the magnetic fluid can flow in the containing groove in response to an annular magnetic field generated by the electromagnetic unit, and the scraper can move up and down in the axial direction of the floating disc body in response to driving of the balance weight part. The annular magnetic field is generated through the electromagnetic unit to drive the magnetic fluid to flow in the containing groove, and flexible regulation and control of the sealing interface are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas storage and transportation, and in particular to a sealed wax scraping integrated inner floating plate and floating roof oil storage tank. Background Art

[0002] Floating roof oil storage tank is a common oil storage equipment. Its design feature is that it has a "floating roof device" that can "float" on the oil surface and rise and fall with the oil level in the tank. The flexible up and down floating of the floating roof device can be close to the liquid surface, thereby greatly reducing the gas space above the liquid surface and effectively reducing the evaporation loss of the stored materials. Among them, floating roof oil storage tanks are widely used in the fields of storing light oil products such as gasoline, aviation kerosene, diesel and crude oil.

[0003] Traditional floating roof devices mostly use mechanical sealing structures, such as elastic scrapers or rubber sealing strips, to achieve tank wall sealing through physical contact. However, in actual applications, such structures have significant defects: First, the seals are easily affected by tank deformation, temperature changes and medium crystallization (such as wax deposition) during long-term operation, resulting in the expansion of the sealing gap and oil and gas leakage; second, the wax scraping mechanism mostly adopts a fixed or spring-loaded design, which is prone to scraper jamming and local scraping leakage when the liquid level fluctuates or the tank wall ovality deviates, aggravating the accumulation of wax layers and causing the risk of tilting of the floating roof device; third, the existing sealing structure and wax scraping structure are mostly set independently, with high structural redundancy, complex installation and debugging, and lack of dynamic adaptive adjustment mechanism, making it difficult to match the deformation compensation requirements of large-diameter storage tanks.

[0004] In response to the above-mentioned technical pain points, it is urgent to develop an integrated inner floating plate with integrated dynamic sealing and adaptive wax scraping functions to achieve flexible control of the sealing interface and precise follow-up of the wax scraping mechanism, thereby simultaneously improving the sealing reliability and wax layer removal efficiency under complex working conditions. Summary of the invention

[0005] In view of the above problems, an embodiment of the present invention provides a sealing and wax scraping integrated inner floating plate and floating roof oil storage tank to solve the problems that the existing floating roof device has poor sealing and wax scraping effects and cannot be adaptively adjusted according to the deformation of the tank wall.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: in the first aspect, an embodiment of the present invention provides a sealed wax-scraping integrated inner floating plate, comprising: a floating plate body, having a receiving groove formed on its side; a plurality of wax-scraping mechanisms, along the circumference of the floating plate body, the plurality of wax-scraping mechanisms are located below the floating plate body, and any wax-scraping mechanism comprises a connecting rod assembly rotatably connected to the bottom wall of the floating plate body, and a counterweight and a scraper arranged at both ends of the connecting rod assembly; a sealing mechanism, comprising an electromagnetic sealing assembly arranged on the periphery of the floating plate body, and the electromagnetic sealing assembly has a magnetic fluid located in the receiving groove and an electromagnetic unit arranged above the floating plate body; wherein, in response to the annular magnetic field generated by the electromagnetic unit, the magnetic fluid can flow in the receiving groove, and in response to the drive of the counterweight, the scraper can move up and down along the axial direction of the floating plate body.

[0007] In some embodiments, the sealing mechanism also includes a tongue-type sealing assembly located on both sides of the connecting rod assembly, the tongue-type sealing assembly having an upper tongue-type band, a lower tongue-type band and a stop band stacked from top to bottom; the first ends of the upper tongue-type band, the lower tongue-type band and the stop band are all fixed to the bottom of the floating plate body, the second end of the stop band is connected to the upper edge of the scraper, and the second ends of the upper tongue-type band and the lower tongue-type band can extend to the outside of the floating plate body.

[0008] In some embodiments, the sealing mechanism further comprises a bladder seal assembly located above the floating plate body, wherein the bladder seal assembly comprises an annular support plate disposed on the top wall of the floating plate body and a bladder seal belt connected to the annular support plate.

[0009] In some embodiments, a plurality of avoidance gaps are formed between the plurality of wax scraping mechanisms along the circumference of the floating plate body, and a micro-groove structure is provided in the outer wall of the capsule sealing belt in areas corresponding to the plurality of avoidance gaps.

[0010] In some embodiments, the floating plate body further has an upper edge and a lower edge extending radially outward, and the upper edge and the lower edge enclose a receiving groove.

[0011] In some embodiments, a buffer block is disposed in the receiving groove, and a cross section of the buffer block is a U-shaped cross section with a bottle-shaped opening.

[0012] In some embodiments, any wax scraping mechanism further includes a pair of wheel frames disposed on the outer side wall of the scraper, a rotating shaft respectively connected to the pair of wheel frames, and a plurality of magnetic wheels sleeved on the outer side of the rotating shaft.

[0013] In some embodiments, the connecting rod assembly includes: a rotating rod having a rotating end and a connecting end relatively arranged, the rotating end being rotatably connected to the bottom wall of the floating plate body; a support rod, one end of which is rotatably connected to the connecting end, and the other end is connected to the scraper; a transmission rod, a head end of which is vertically connected to the rotating end, and a tail end of which is rotatably connected to the counterweight; a rotating auxiliary rod, a first end of which is rotatably connected to the bottom wall of the floating plate body, and a second end of which is rotatably connected to the support rod; a reinforcing rod, both ends of which are respectively connected to the rotating rod and the transmission rod, and can be enclosed with the transmission rod and the rotating rod to form a triangular support structure.

[0014] In a second aspect, an embodiment of the present invention further provides a floating roof oil storage tank, comprising a tank body having an oil storage cavity, a tank top for opening or closing the oil storage cavity, and an integrated inner float plate for sealing and scraping wax as above, wherein the integrated inner float plate for sealing and scraping wax is located in the oil storage cavity.

[0015] In some embodiments, the floating plate body is provided with a plurality of guide holes connected to the oil storage chamber, and the floating roof oil storage tank also includes: an anti-rotation rod cooperating with the guide hole, the two ends of the anti-rotation rod being respectively connected to the tank top and the bottom wall of the tank body to limit the circumferential displacement of the floating plate body; a sealing sleeve located in the guide hole, which is sleeved on the outer side of the anti-rotation rod to seal the gap between the anti-rotation rod and the guide hole.

[0016] Due to the adoption of the above technical solution, the beneficial effects that can be achieved by the present invention are:

[0017] First, the sealing and wax scraping integrated inner floating plate provided by the present invention generates an annular magnetic field through an electromagnetic unit to drive the magnetic fluid to flow in the receiving groove, thereby realizing flexible regulation of the sealing interface. Under the action of the annular magnetic field, the magnetic fluid can adaptively fill the tiny gap between the tank wall and the floating plate, solving the problem of sealing failure caused by the deformation of the tank body in traditional static sealing, and is particularly suitable for radial deformation compensation of large-diameter storage tanks. Secondly, the linkage design of the counterweight and the connecting rod assembly allows the scraper to float up and down along the axial direction with the fluctuation of the liquid level and the change of the ellipticity of the tank wall, avoiding the problems of local scraping or jamming caused by the uneven tank wall of the traditional fixed scraper, and significantly improving the wax layer removal efficiency. In addition, the present invention integrates the sealing and wax scraping functions into the same floating plate body, reduces the redundant structure, reduces the installation complexity, and realizes the dynamic coordinated optimization of sealing and wax scraping through the synergistic effect of the magnetic field and mechanical linkage, which is conducive to the synchronous improvement of the sealing and wax scraping effects of the inner floating plate.

[0018] In addition, the floating roof oil storage tank provided by the present invention can better avoid oil and gas leakage compared with other existing oil storage equipment because the above-mentioned sealed and wax-scraped integrated inner floating plate is arranged in its tank body, thereby facilitating the improvement of the oil storage effect and stability of the equipment.

[0019] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a sealed wax scraping integrated inner floating plate provided by the present invention; Figure 2 It is a structural schematic diagram of another sealing and wax scraping integrated inner floating plate provided by the present invention; Figure 3 It is a top view of a sealed wax scraping integrated inner floating plate provided by the present invention; Figure 4 The present invention provides Figure 3 Schematic diagram of the AA section; Figure 5 The present invention provides Figure 4 An enlarged schematic diagram of part a; Figure 6 It is a structural schematic diagram of another sealing and wax scraping integrated inner floating plate provided by the present invention; Figure 7 The present invention provides Figure 6 A magnified schematic diagram of part b; Figure 8 It is a structural schematic diagram of a wax scraping mechanism provided by the present invention; Fig. 9 The present invention provides Figure 8 An enlarged schematic diagram of part c; Fig.10 It is a structural schematic diagram of another wax scraping mechanism provided by the present invention; Fig.11 It is a structural schematic diagram of a floating roof oil storage tank provided by the present invention; Fig.12 It is a structural schematic diagram of an anti-rotation rod provided by the present invention.

[0021] In the figure: 100 floating plate body, 110 receiving groove, 120 upper edge, 130 lower edge, 140 buffer pad; 200 wax scraping mechanism, 210 connecting rod assembly, 211 rotating rod, 212 supporting rod, 213 transmission rod, 214 rotating auxiliary rod, 215 reinforcing rod, 220 counterweight, 230 scraper, 231 wheel frame, 232 rotating shaft, 233 magnetic wheel; 300 sealing mechanism, 310 electromagnetic sealing assembly, 311 magnetic fluid, 312 electromagnetic unit, 320 tongue-shaped sealing assembly, 321 upper tongue-shaped belt, 322 lower tongue-shaped belt, 323 stop belt, 324 fixing plate, 330 bladder-type sealing assembly, 331 annular support plate, 332 bladder-type sealing belt; 400 floating roof oil storage tank, 410 tank body, 420 tank top, 430 anti-rotation rod. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0023] Reference Figure 1-Figure 5 As shown, an embodiment of the present invention provides a sealed wax scraping integrated inner floating plate, comprising a floating plate body 100, a plurality of wax scraping mechanisms 200, and a sealing mechanism 300. Specifically, the floating plate body 100 has a receiving groove 110 formed on its side; along the circumference of the floating plate body 100, a plurality of wax scraping mechanisms 200 are located below the floating plate body 100, and any wax scraping mechanism 200 includes a connecting rod assembly 210 rotatably connected to the bottom wall of the floating plate body 100, and a counterweight 220 and a scraper 230 arranged at both ends of the connecting rod assembly 210; the sealing mechanism 300 includes an electromagnetic sealing assembly 310 arranged at the periphery of the floating plate body 100, and the electromagnetic sealing assembly 310 has a magnetic fluid 311 located in the receiving groove 110 and an electromagnetic unit 312 arranged above the floating plate body 100. In response to the annular magnetic field generated by the electromagnetic unit 312 , the magnetic fluid 311 can flow in the receiving groove 110 , and in response to the driving of the counterweight 220 , the scraper 230 can move up and down along the axial direction of the floating plate body 100 .

[0024] It should be noted that the inner floating plate is an important accessory in the floating roof oil storage tank. In order to make it better adapt to the products stored in the oil storage tank and the structure of the oil storage tank itself, the floating plate body can be configured into a variety of different types and structures. For example, when the oil storage tank stores light oil products, chemical raw materials and other liquids, the floating plate body can be a fixed structure, floating on the liquid surface and can rise and fall with the change of liquid level; when the oil storage tank stores liquids with high viscosity or prone to static electricity, the floating plate body can be a movable structure and can move horizontally in the tank body to better adapt to the irregular changes in the liquid level in the tank; when the oil storage tank stores liquids that are prone to fluctuations, the floating plate body can be made of flexible materials or elastic materials to adapt to the fluctuations of the liquid level in the tank and reduce the stress caused by changes in the liquid level; when the oil storage tank is large in size or irregular in shape, the floating plate body can be a combined structure and can be composed of multiple small floating plate units. This design allows the floating plate body to adapt to changes in the liquid level while also being flexibly adjusted according to the size and shape of the oil storage tank.

[0025] It should also be noted that the reason why multiple wax scraping mechanisms 200 are evenly spaced along the circumference of the floating plate body 100 is, on the one hand, to improve the scraping efficiency and scraping effect of the wax scraping unit by cleaning multiple positions of the inner wall of the oil storage tank through multiple wax scraping mechanisms 200; on the other hand, the gaps between the multiple wax scraping mechanisms 200 can control the friction between the wax scraping mechanism 200 and the inner wall of the oil storage tank within a reasonable range, thereby preventing the floating plate body 100 from being able to float sensitively in real time with the change of the liquid level in the oil storage tank when the friction is too large. In specific implementation, the specific configuration number of the wax scraping mechanism 200 can be flexibly configured according to the actual product size and user needs, and this application does not limit this.

[0026] In the wax scraping mechanism 200, the counterweight 220 is a non-powered driving structure that mainly drives the movement of the connecting rod assembly 210 through its own gravity to achieve the up and down movement of the scraper 230. On the one hand, in view of the different types of products in the oil storage tank, the buoyancy generated by products of different densities and types on the floating plate body 100 may also be different; on the other hand, different positions on the inner wall of the oil storage tank or when the oil storage tank is deformed, it will also generate different pressures on the scraper 230. Therefore, the specific weight of the counterweight 220 should be reasonably configured according to the specific application scenario of the wax scraping mechanism 200, and this application does not limit this.

[0027] The working principle of the electromagnetic sealing component 310 is mainly to use the magnetic and rheological properties of the magnetic fluid 311 to achieve the sealing effect. Among them, the magnetic fluid is a liquid formed by micron-sized ferromagnetic particles suspended in a carrier liquid. Under the action of an external magnetic field, the magnetic fluid will be magnetized and generate a certain magnetic force; by controlling the size and direction of the magnetic field, the viscosity and flow properties of the magnetic fluid can be adjusted to achieve a sealing effect. Usually, the magnetic fluid sealing structure is mainly composed of a sealer and a magnet. The magnetic fluid is arranged in the sealer, and the sealer can play a protective and anti-leakage function, and the magnet is used to generate a specific magnetic field. In this application, the matching structure between the receiving groove and the inner wall of the oil storage tank constitutes a sealer, and the electromagnetic unit plays the role of a magnet. The annular magnetic field generated by the electromagnetic unit can control the movement of the magnetic fluid in the receiving groove, thereby achieving the sealing of the gap between the inner floating plate and the inner wall of the oil storage tank.

[0028] Preferably, the electromagnetic unit 312 can be composed of a plurality of electromagnetic modules, three electromagnetic modules form a group, and the plurality of electromagnetic modules are evenly arranged along the periphery of the floating plate body 100, and there is an electromagnetic gap between adjacent electromagnetic module groups; further, the position of the electromagnetic gap corresponds to the position of the plurality of gaps formed between the plurality of wax scraping units. This arrangement can make the magnetic fluid 311 gather in the area corresponding to the plurality of gaps in the accommodating groove 110, thereby specifically improving the sealing effect of the electromagnetic sealing assembly 310 on the key position of the floating plate body 100, especially the position where the wax scraping mechanism 200 is not configured, thereby optimizing the sealing performance of the device as a whole.

[0029] The sealing and wax scraping integrated inner floating plate provided by the present invention generates an annular magnetic field through the electromagnetic unit 312 to drive the magnetic fluid 311 to flow in the receiving groove 110, thereby realizing flexible regulation of the sealing interface. Under the action of the annular magnetic field, the magnetic fluid 311 can adaptively fill the small gap between the tank wall and the floating plate, solve the problem of sealing failure caused by the deformation of the tank body in the traditional static seal, and is particularly suitable for radial deformation compensation of large-diameter storage tanks. Secondly, the linkage design of the counterweight 220 and the connecting rod assembly 210 allows the scraper 230 to float up and down along the axial direction with the fluctuation of the liquid level and the change of the ellipticity of the tank wall, avoiding the problems of local scraping or jamming caused by the uneven tank wall of the traditional fixed scraper, and significantly improving the wax layer removal efficiency. In addition, the present invention integrates the sealing and wax scraping functions into the same floating plate body, reduces the redundant structure, reduces the installation complexity, and realizes the dynamic coordinated optimization of sealing and wax scraping through the synergistic effect of the magnetic field and mechanical linkage, which is conducive to the synchronous improvement of the sealing and wax scraping effects of the inner floating plate.

[0030] In some embodiments, reference Figure 6 and Figure 7As shown, the sealing mechanism 300 further includes tongue-shaped sealing components 320 located on both sides of the connecting rod assembly 210. Specifically, the tongue-shaped sealing components 320 have an upper tongue-shaped belt 321, a lower tongue-shaped belt 322, and a stop belt 323 stacked from top to bottom. The first ends of the upper tongue-shaped belt 321, the lower tongue-shaped belt 322, and the stop belt 323 are all fixed to the bottom of the floating disc body 100. The second end of the stop belt 323 is connected to the upper edge of the scraper 230. The second ends of the upper tongue-shaped belt 321 and the lower tongue-shaped belt 322 can both extend to the outside of the floating disc body 100.

[0031] Among them, there can be various specific materials for the upper tongue-shaped belt 321, the lower tongue-shaped belt 322, and the stop belt 323, such as fluororubber, nitrile rubber, ethylene propylene diene monomer rubber, polytetrafluoroethylene, etc. Among them, fluororubber has excellent oil resistance and high-temperature resistance, and is suitable for sealing requirements in high-temperature environments; nitrile rubber has good oil resistance and medium heat resistance, and is suitable for general industrial applications; ethylene propylene diene monomer rubber has excellent aging resistance, ozone resistance, and weather aging resistance, and is suitable for outdoor and harsh environments; polytetrafluoroethylene has extremely high chemical corrosion resistance and a low friction coefficient, and is suitable for strongly corrosive media. In view of the different characteristics of different materials, in specific implementation, the material of the tongue-shaped sealing component 320 can be adjusted to make it suitable for different application scenarios.

[0032] Regarding the connection method between the upper tongue-shaped belt 321, the lower tongue-shaped belt 322, the stop belt 323 and the floating disc body 100, there can be various different implementation manners in this application. Exemplarily, the tongue-shaped sealing component 320 further has a fixing plate 324 provided at the first ends of the upper tongue-shaped belt 321, the lower tongue-shaped belt 322, and the stop belt 323, and a fastener (not marked in the figure). The fixing plate 324 is provided with fixing holes (not shown in the figure). The first ends of the upper tongue-shaped belt 321, the lower tongue-shaped belt 322, and the stop belt 323 are respectively provided with through holes (not shown in the figure) corresponding to the fixing holes. The fastener can pass through the through holes and the fixing holes to realize the detachable connection between the tongue-shaped sealing component 320 and the floating disc body 100.

[0033] In addition, it should be noted that in order to ensure that the upper tongue-shaped belt 321 and the lower tongue-shaped belt 322 can stably seal the gap between the inner wall of the storage tank and the floating disc body 100, preferably, the horizontal distance between the outer edges of the upper tongue-shaped belt 321 and the lower tongue-shaped belt 322 and the peripheral edge of the floating disc body 100 is not less than the horizontal distance between the outer edge of the scraper 230 and the peripheral edge of the floating disc body 100.

[0034] In this embodiment, the addition of the tongue-shaped sealing assembly 320 further enhances the sealing effect of the device. The stacked arrangement of the upper tongue-shaped belt 321, the lower tongue-shaped belt 322 and the stop belt 323 can effectively prevent the leakage of liquid and gas, form a multi-layer sealing barrier, and improve the reliability of the seal. In addition, the setting of the stop belt 323 can not only seal the gap between the scraper 230 and the floating plate body 100, but also can synchronously adjust the fit between the sealing belts to a certain extent during the movement of the scraper 230, so as to prevent the sealing belt from tilting due to the movement of the scraper 230 and causing leakage gaps.

[0035] In some embodiments, continue to refer to Figure 1 and Figure 5 As shown, the sealing mechanism 300 further includes a bladder seal assembly 330 located above the floating plate body 100. Specifically, the bladder seal assembly 330 includes an annular support plate 331 disposed on the top wall of the floating plate body 100 and a bladder seal belt 332 connected to the annular support plate 331.

[0036] The introduction of the bladder seal assembly 330 provides an additional sealing layer for the inner floating plate, thereby effectively filling the gap between the floating plate body 100 and the tank wall, further enhancing the sealing performance and reducing the risk of liquid leakage and gas volatilization. In addition, the bladder seal belt 332 has a certain elasticity and can adapt to the fluctuation of the liquid level in the storage tank. When the liquid level rises or falls, the bladder seal belt 332 can automatically adjust its shape to always maintain a good sealing state, thereby improving the adaptability and stability of the inner floating plate under different working conditions.

[0037] It is understandable that the bladder-type sealing belt 332 can be divided into a gas-type sealing belt, a liquid-type sealing belt or an elastomeric sealing belt, etc., according to the type of the filling medium inside it. The present application does not limit the specific structure and type of the bladder-type sealing belt 332.

[0038] Further, refer to Figure 1 and Figure 2 As shown, along the circumference of the floating plate body 100, a plurality of avoidance gaps (not marked in the figure) are formed between the plurality of wax scraping mechanisms 200, and the outer wall of the bladder sealing belt 332 is provided with micro-groove structures (not shown in the figure) in areas corresponding to the plurality of avoidance gaps.

[0039] On the one hand, the setting of the micro-grooves can form micro-lubrication channels on the surface of the bladder sealing belt 332, thereby reducing the sliding friction coefficient between the bladder sealing belt 332 and the tank wall, avoiding wear or adhesion of the bladder sealing belt 332 due to long-term friction, and helping to extend the service life of the bladder sealing belt 332; on the other hand, the micro-groove structure can also guide wax residue or impurities attached to the tank wall to flow in a specific direction, preventing impurities from accumulating in the avoidance gap and affecting the rebound performance of the bladder sealing belt 332.

[0040] In some embodiments, reference Figure 5 As shown, the floating plate body 100 also has an upper edge 120 and a lower edge 130 extending radially outward, and the upper edge 120 and the lower edge 130 enclose a receiving groove 110. The receiving groove 110 enclosed by the upper edge 120 and the lower edge 130 forms a closed flow cavity for the magnetic fluid 311, which prevents the magnetic fluid 311 from overflowing during the movement of the inner floating plate, and at the same time uses the magnetic field gradient to control the uniformity of the distribution of the magnetic fluid 311 to ensure the integrity of the annular sealing interface. In addition, the open structure of the receiving groove 110 facilitates the replenishment or replacement of the magnetic fluid 311, which can reduce the maintenance cost of the equipment.

[0041] Furthermore, a buffer block 140 is provided in the receiving tank 110, and the cross section of the buffer block 140 is a U-shaped cross section with a bottle-shaped opening. On the one hand, the buffer block 140 with a U-shaped cross section can absorb the impact energy generated by the lifting and lowering of the inner floating plate or the shaking of the liquid surface through elastic deformation, reduce the mechanical vibration transmitted to the magnetic fluid 311, and avoid splashing or uneven distribution of the magnetic fluid 311 due to high-frequency vibration; on the other hand, the bottle-shaped opening design of the U-shaped cross section can further limit the flow range of the magnetic fluid 311, and prevent the magnetic fluid 311 from escaping from the receiving tank 110 under severe shaking conditions.

[0042] In some embodiments, reference Figure 8 and Fig. 9 As shown, any wax scraping mechanism 200 further includes a pair of wheel frames 231 disposed on the outer side wall of the scraper 230, a rotating shaft 232 respectively connected to the pair of wheel frames 231, and a plurality of magnetic wheels 233 sleeved on the outer side of the rotating shaft 232. Optionally, the number of the magnetic wheels 233 can be four.

[0043] The magnetic wheel 233 maintains a constant contact pressure between the scraper 230 and the tank wall through magnetic adsorption, which can avoid the pressure decay caused by fatigue of the traditional spring clamping mechanism, and is particularly suitable for the working condition where the scraper 230 is easy to separate from the tank wall when the liquid level is low. In addition, the rolling of the magnetic wheel 233 along the tank wall can reduce the resistance encountered by the scraper 230 during movement, and at the same time, the posture of the scraper 230 can be fine-tuned through the cooperation of the rotating shaft 232 and the wheel frame 231, ensuring that the scraping wax surface is always parallel to the tank wall, thereby improving the uniformity of scraping wax.

[0044] It should be noted that, although the present application does not limit the specific structure of the scraper 230, in order to make it better fit the shape of the oil storage tank, the circumferential profile of the scraper 230 is preferably arc-shaped. In addition, in order to ensure that the scraper 230 is always in contact with the tank wall, the upper and lower ends of the scraper 230 are also respectively provided with an upper folding edge and a lower folding edge that are in contact with the tank wall respectively; and from the upper folding edge to the lower folding edge, the longitudinal section of the scraper 230 has a slight curvature with the upper and lower ends protruding outward and the middle part concave inward. The existence of this slight curvature can, to a certain extent, avoid the situation where the magnetic wheel 233 protrudes too much from the scraper 230, resulting in the upper and lower folding edges being unable to stably contact with the tank wall.

[0045] In some embodiments, reference Fig.10 As shown, the connecting rod assembly 210 includes a rotating rod 211, a supporting rod 212, a transmission rod 213, a rotating sub-rod 214 and a reinforcing rod 215. The rotating rod 211 has a rotating end and a connecting end arranged opposite to each other, and the rotating end is rotatably connected to the bottom wall of the floating plate body 100; one end of the supporting rod 212 is rotatably connected to the connecting end, and the other end is connected to the scraper 230; the head end of the transmission rod 213 is vertically connected to the rotating end, and the tail end is rotatably connected to the counterweight 220; the first end of the rotating sub-rod 214 is rotatably connected to the bottom wall of the floating plate body 100, and the second end is rotatably connected to the supporting rod 212; the two ends of the reinforcing rod 215 are respectively connected to the rotating rod 211 and the transmission rod 213, and can be enclosed between the transmission rod 213 and the rotating rod 211 to form a triangular support structure.

[0046] The multi-hinged structure between the rods in the connecting rod assembly 210 enables the scraper 230 to move up and down in the axial direction while having the freedom to swing radially, so that the scraper 230 can adapt to the local protrusions or depressions of the tank wall to avoid the damage to the equipment caused by the hard contact between the scraper 230 and the tank wall. In addition, the triangular support structure formed by the reinforcing rod 215, the rotating rod 211, and the transmission rod 213 can significantly improve the bending rigidity of the connecting rod assembly 210, and prevent the deformation or breakage of the mechanism when the scraping resistance suddenly increases (such as a hard wax layer).

[0047] In addition, refer to Fig.11 and Fig.12 As shown, an embodiment of the present invention further provides a floating roof oil storage tank 400, including a tank body 410 having an oil storage cavity (not marked in the figure), a tank top 420 for opening or closing the oil storage cavity, and an inner floating plate as above, wherein the inner floating plate is located in the oil storage cavity.

[0048] Furthermore, the floating plate body 100 is provided with a plurality of guide holes (not marked in the figure) connected to the oil storage chamber; the floating roof oil storage tank 400 also includes an anti-rotation rod 430 that cooperates with the guide hole, and the two ends of the anti-rotation rod 430 are respectively connected to the tank top 420 and the bottom wall of the tank body 410 to limit the circumferential displacement of the floating plate body 100; a sealing sleeve (not shown in the figure) located in the guide hole is sleeved on the outer side of the anti-rotation rod 430 to seal the gap between the anti-rotation rod 430 and the guide hole.

[0049] The cooperation between the anti-rotation rod 430 and the guide hole limits the circumferential displacement of the floating plate, which can prevent the sealing structure from generating local wrinkles or tears due to the twisting of the inner floating plate. At the same time, when the sealing sleeve fills the gap in the guide hole, it can prevent oil and gas from leaking through the gap between the anti-rotation rod 430 and the guide hole.

[0050] The floating roof oil storage tank provided by the present invention can better avoid oil and gas leakage compared with other existing oil storage equipment because the above-mentioned inner floating plate is arranged in the tank body 410, thereby facilitating the improvement of the oil storage effect and stability of the equipment.

[0051] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Wherein, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the present invention.

[0052] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A sealed wax scraping integrated inner floating plate, characterized in that: include: The floating plate body has a receiving groove formed on the side thereof; A plurality of wax scraping mechanisms are arranged along the circumference of the floating plate body, and the plurality of wax scraping mechanisms are located below the floating plate body. Each of the wax scraping mechanisms comprises a connecting rod assembly rotatably connected to the bottom wall of the floating plate body, and a counterweight and a scraper disposed at both ends of the connecting rod assembly. The sealing mechanism comprises an electromagnetic sealing assembly arranged at the periphery of the floating plate body, wherein the electromagnetic sealing assembly comprises a magnetic fluid located in the containing groove and an electromagnetic unit arranged above the floating plate body; Wherein, in response to the annular magnetic field generated by the electromagnetic unit, the magnetic fluid can flow in the containing groove, and in response to the driving of the counterweight, the scraper can move up and down along the axial direction of the floating plate body.

2. The sealing and wax scraping integrated inner floating plate according to claim 1, characterized in that: The sealing mechanism also includes tongue-shaped sealing assemblies located on both sides of the connecting rod assembly, and the tongue-shaped sealing assemblies include an upper tongue-shaped belt, a lower tongue-shaped belt and a stop belt stacked from top to bottom; The first ends of the upper tongue-shaped belt, the lower tongue-shaped belt and the stop belt are all fixed to the bottom of the floating plate body, the second end of the stop belt is connected to the upper edge of the scraper, and the second ends of the upper tongue-shaped belt and the lower tongue-shaped belt can extend to the outside of the floating plate body.

3. The sealing and wax scraping integrated inner floating plate according to claim 2, characterized in that: The sealing mechanism further comprises a bladder-type sealing assembly located above the floating plate body, wherein the bladder-type sealing assembly comprises an annular support plate arranged on the top wall of the floating plate body and a bladder-type sealing belt connected to the annular support plate.

4. The sealing and wax scraping integrated inner floating plate according to claim 3, characterized in that: Along the circumference of the floating plate body, a plurality of avoidance gaps are formed between the plurality of wax scraping mechanisms, and a micro-groove structure is provided in the outer wall of the bag-type sealing belt in areas corresponding to the plurality of avoidance gaps.

5. The sealing and wax scraping integrated inner floating plate according to claim 1, characterized in that: The floating plate body also has an upper edge and a lower edge extending radially outward, and the upper edge and the lower edge enclose the accommodating groove.

6. The sealing and wax scraping integrated inner floating plate according to claim 5, characterized in that: A buffer pad is arranged in the accommodating groove, and the cross section of the buffer pad is a U-shaped cross section with a bottle-shaped opening.

7. The sealing and wax scraping integrated inner floating plate according to claim 1, characterized in that: Any of the wax scraping mechanisms further comprises a pair of wheel frames arranged on the outer side wall of the scraper, a rotating shaft respectively connected to the pair of wheel frames, and a plurality of magnetic wheels sleeved on the outer side of the rotating shaft.

8. The sealing and wax scraping integrated inner floating plate according to claim 7, characterized in that: The connecting rod assembly comprises: A rotating rod having a rotating end and a connecting end arranged opposite to each other, wherein the rotating end is rotatably connected to the bottom wall of the floating plate body; A support rod, one end of which is rotatably connected to the connecting end, and the other end of which is connected to the scraper; A transmission rod, the head end of which is vertically connected to the rotating end, and the tail end of which is rotatably connected to the counterweight; A rotating auxiliary rod, the first end of which is rotatably connected to the bottom wall of the floating plate body, and the second end of which is rotatably connected to the supporting rod; The reinforcing rod has two ends respectively connected to the rotating rod and the transmission rod, and can be enclosed with the transmission rod and the rotating rod to form a triangular supporting structure.

9. A floating roof oil storage tank, characterized in that: It comprises a tank body with an oil storage cavity, a tank top for opening or closing the oil storage cavity, and a sealed wax scraping integrated inner floating disk as described in any one of claims 1 to 8, wherein the sealed wax scraping integrated inner floating disk is located in the oil storage cavity.

10. The floating roof oil storage tank according to claim 9, characterized in that: The floating plate body is provided with a plurality of guide holes connected to the oil storage cavity, and the floating roof oil storage tank further comprises: an anti-rotation rod matched with the guide hole, wherein both ends of the anti-rotation rod are respectively connected to the tank top and the bottom wall of the tank body to limit the circumferential displacement of the floating plate body; The sealing sliding sleeve located in the guide hole is sleeved on the outer side of the anti-rotation rod to seal the gap between the anti-rotation rod and the guide hole.

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