Petroleum storage tank

Abstract

The invention discloses a petroleum storage tank, and belongs to the technical field of storage containers. The filtering assembly is arranged at the lower end part of the tank body and comprises an upper cavity, a lower cavity and a rotary drum arranged between the upper cavity and the lower cavity from top to bottom, and the axis of the rotary drum is horizontally arranged; the driving device is used for driving the rotary drum to rotate around the axis of the rotary drum; the device has the following beneficial effects that the filtering assembly comprises the rotary drum, when the rotary drum is rotated to clean sediments, disturbance on oil storage in the tank body is small, the sediments can be prevented from being mixed with the oil storage again, the cleaning efficiency is guaranteed, the sediments are driven to enter the lower cavity to be cleaned through rotation, and the cleaning efficiency is improved. The sediment is cleaned to the lower cavity and then discharged in a concentrated mode, the impurity discharging efficiency can be improved, the clean oil storage discharging amount is reduced, the content of discharged impurity oil storage is low, the discharged impurity oil storage is not filtered again, the oil storage is recycled, the refiltering procedure is reduced, the cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of storage containers, and particularly to an oil storage tank. Background Art

[0002] During the oil processing process, it is necessary to store oil and the products of oil processing. The containers for storing oil and the products of oil processing are collectively referred to as oil storage tanks, which are divided into horizontal and vertical types. When storing oil or storing refined oil products such as diesel oil, impurities will precipitate inside the oil; and due to reasons such as paraffin precipitation, water separation from fuel, impurity mixing, and oxidation of sulfur or phosphorus compounds in the refined oil products such as diesel oil, impurity precipitation will also occur. During the storage process, the impurities will gradually precipitate to form precipitated sludge, and the sludge and gum will corrode the tank wall, so it is necessary to clean regularly.

[0003] For vertical oil storage tanks, in the prior art, a scraping method is used to clean the sludge on the tank wall, and then the impurities are discharged by opening the drain valve at the bottom. Generally, to clean the bottom sludge, all the stored oil in the tank is drained and flushed, which is troublesome and not convenient enough. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide an oil storage tank.

[0005] To achieve the above purpose, the technical solution of the present invention is: an oil storage tank, comprising: A tank body with a vertical axis; A filtering assembly disposed at the lower end of the tank body, including an upper chamber, a lower chamber from top to bottom, and a rotating cylinder disposed between the upper chamber and the lower chamber, the axis of the rotating cylinder being horizontally disposed; A driving device for driving the rotating cylinder to rotate around its axis; Downstream along the rotation direction of the rotating cylinder, a channel is provided on the side wall between the upper chamber and the lower chamber, and a one-way plate is provided at the channel. The one-way plate is configured to be able to deflect and open unidirectionally towards the lower chamber when the rotating cylinder rotates around its axis.

[0006] Further, along the vertical direction, guide plates are inclined towards the central region around the bottom of the upper chamber.

[0007] Further, the channel is rectangular and disposed at the lower end of a guide plate; along the axial direction of the rotating cylinder, a rotating shaft is provided at the upper end of the one-way plate and is rotationally matched with the side wall of the channel.

[0008] Further, the rotating shaft is not rotationally matched with the one-way plate. A limiting plate is provided on the surface of the one-way plate close to the lower chamber. An elastic member is provided between the rotating shaft and the channel, and under the elastic force of the elastic member, the limiting plate can be made to abut against the side of the channel to block the channel.

[0009] Furthermore, the filtering component further includes: an impact chamber, which is arranged around the upper chamber, and a plurality of second through holes are formed through the side wall of the upper chamber, and the second through holes are communicated with the impact chamber.

[0010] Furthermore, it further includes: an oil outlet pipe, which is arranged on the tank body; a buffer component, which includes a first cylindrical tube communicated with the oil outlet pipe, a first plate slidably arranged in the first cylindrical tube in a guiding manner, a first elastic member arranged between the first plate and the second plate, and a first connecting pipe arranged at one end of the first cylindrical tube far away from the oil outlet pipe, and the first connecting pipe is communicated with the impact chamber.

[0011] Furthermore, the channel is arranged below the impact chamber and is not communicated with the impact chamber.

[0012] Furthermore, along the rotation direction of the rotating cylinder, on the side of the rotating cylinder far away from the channel, a scraping part is further arranged below the impact chamber, and the scraping part is used for scraping and cleaning the outer peripheral surface of the rotating cylinder.

[0013] Furthermore, in the area corresponding to the upper chamber, a plurality of first through holes are arranged on the side wall of the rotating cylinder; the rotating cylinder is communicated with a second connecting pipe, the other end of the second connecting pipe is communicated with the inside of the tank body, and a pump is arranged on the second connecting pipe.

[0014] Furthermore, a rigid shaft is coaxially and rotatably arranged on the rotating cylinder, the second connecting pipe is connected with the rigid shaft, and an internal channel communicating the second connecting pipe and the inside of the rotating cylinder is arranged inside the rigid shaft.

[0015] An oil storage tank of the present invention belongs to the technical field of storage containers, and has the following beneficial effects compared with the prior art: 1. The filtering component includes a rotating cylinder. When the rotating cylinder is rotated to clean the sediment, the disturbance to the stored oil in the tank body is small, which can inhibit the sediment from being mixed with the stored oil again and ensure the cleaning efficiency.

[0016] 2. By the method of driving the sediment to enter the lower chamber for cleaning through rotation, after the sediment is cleaned into the lower chamber, it is discharged centrally, which can improve the efficiency of discharging sundries, reduce the discharge amount of clean stored oil, and the oil content in the discharged impurities is low. It is not necessary to filter and recycle the stored oil from the discharged impurities again, reducing the re-filtering process and reducing costs and improving efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of an oil storage tank of the present invention Figure 1 .

[0018] Figure 2 It is a schematic diagram of the overall structure of an oil storage tank of the present invention Figure 2 .

[0019] Figure 3 Schematic diagram of the overall structure of an oil storage tank according to the present invention Figure 3 .

[0020] Figure 4 Schematic diagram of the internal structure of a buffer component in an oil storage tank according to the present invention.

[0021] Figure 5 Schematic diagram of the structure of a filtering component in an oil storage tank according to the present invention Figure 1 .

[0022] Figure 6 Schematic diagram of the structure of a filtering component in an oil storage tank according to the present invention Figure 2 .

[0023] Figure 7 Schematic diagram of the sectional structure of a filtering component in an oil storage tank according to the present invention.

[0024] Figure 8 Schematic diagram of the structure of a hidden rotating cylinder of a filtering component in an oil storage tank according to the present invention.

[0025] Figure 9 Schematic diagram of the top view of a hidden rotating cylinder of a filtering component in an oil storage tank according to the present invention.

[0026] Figure 10 Schematic diagram of the sectional structure when the rotating cylinder of a filtering component in an oil storage tank is hidden according to the present invention.

[0027] Figure 11 Schematic diagram of the sectional structure when the rotating cylinder of a filtering component in an oil storage tank is hidden according to the present invention.

[0028] Figure 12 Schematic diagram of the structure of a one - way plate in an oil storage tank according to the present invention.

[0029] Figure 13 Schematic diagram of the structure of a rotating cylinder in an oil storage tank according to the present invention.

[0030] Figure 14 Schematic diagram of the sectional structure of a rotating cylinder in an oil storage tank according to the present invention.

[0031] Figure 15 Schematic diagram of the structure of a baffle component in an oil storage tank according to the present invention.

[0032] Figure 16 Schematic diagram of the structure of a telescopic member in an oil storage tank according to the present invention.

[0033] In the figure: 1, tank body; 10, oil outlet pipe; 11, buffer assembly; 110, first connecting pipe; 1101, first communication port; 111, first cylindrical barrel; 112, first plate; 113, first elastic member; 12, sewage outlet; 2, filtering assembly; 20, limiting member; 201, fixed column; 21, rotating cylinder; 210, first through hole; 211, gear; 212, cover plate; 213, blank area; 22, rigid shaft; 220, connecting head; 221, second connecting pipe; 2210, second communication port; 222, internal channel; 223, baffle plate; 224, support plate; 225, telescopic member; 2250, second cylindrical barrel; 2251, rigid rod; 2252, piston; 2253, second elastic member; 2254, communication flow channel; 23, pump; 226, flow outlet; 24, connecting flange; 25, guide plate; 250, second through hole; 251, channel; 252, upper cavity; 2520, deposition area; 253, annular plate; 26, one-way plate; 261, rotating shaft; 262, limiting plate; 28, installation channel; 280, lower cavity; 281, scraping part; 29, impact cavity; 290, third communication port; 291, partition plate; 3, rotation direction. Detailed implementation manners

[0034] The present invention will now be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0035] Embodiment 1 Please refer to Figures 1-6 , as a specific implementation manner, the technical solution of the present invention is: an oil storage tank, comprising: A tank body 1 with a vertical axis; A filtering assembly is arranged at the lower end of the tank body 1, and from top to bottom, it includes an upper cavity 252, a lower cavity 280, and a rotating cylinder 21 arranged between the upper cavity 252 and the lower cavity 280. The axis of the rotating cylinder 21 is horizontally arranged; A driving device for driving the rotating cylinder 21 to rotate around its axis; Downstream along the rotation direction 3 of the rotating cylinder 21, a channel 251 is arranged on the side wall between the upper cavity 252 and the lower cavity 280, and a one-way plate 26 is arranged at the channel 251. The one-way plate 26 is configured to be able to deflect and open unidirectionally towards the lower cavity 280 when the rotating cylinder 21 rotates around its axis.

[0036] Specifically, the oil storage tank provided in this application includes a vertical tank body 1. The upper end of the tank body 1 is closed and the lower end is open. The lower end is detachably and fixedly connected to the filtering assembly through a connecting flange 24. The filtering assembly includes: an outer shell, refer to Figure 7 , Figure 8, mounting channels 28 are provided at both ends of the outer housing. A rotating cylinder 21 is rotatably arranged in the mounting channel 28. The outer circumference of the rotating cylinder 21 is in sealing fit with the inner circumferential surface of the mounting channel 28. From top to bottom, an upper cavity 252 above the rotating cylinder 21 and a lower cavity 280 below the rotating cylinder 21 are formed inside the outer housing. The upper cavity 252 is directly communicated with the lower end of the tank body 1. A sewage outlet 12 is provided at the bottom of the lower cavity 280. Refer to Figure 6 , a part of the outer circumferential surface of the rotating cylinder 21 is exposed in the upper cavity 252. In this way of setting, when storing oil in the tank body 1, the sewage outlet 12 is closed. The impurities and sediments in the stored oil sink into the upper cavity 252 under the action of gravity and precipitate on the outer circumferential surface of the rotating cylinder 21.

[0037] Furthermore, refer to Figure 6 、 Figure 7 , the rotating cylinder 21 can rotate around its own axis along the rotation direction 3. At the downstream of the rotation direction 3, a channel 251 is provided at the bottom of the upper cavity 252. A one-way plate 26 that can unidirectionally open the channel 251 is provided at the channel 251. The one-way plate 26 is configured as follows: when the rotating cylinder 21 does not rotate, the one-way plate 26 is in a closed state blocking the channel 251. At this time, when the impurities in the stored oil precipitate, they can accumulate on the one-way plate 26, preventing the impurities from directly entering the lower cavity 280 and adhering to the side wall of the lower cavity 280, which can improve the cleanliness of the lower cavity 280 and reduce the frequency of cleaning the lower cavity 280; after the precipitate in the upper cavity 252 accumulates to a certain thickness, at this time, the rotating cylinder 21 slowly rotates around its axis along the rotation direction 3. When rotating, it can drive the precipitate on the surface of the rotating cylinder 21 to move together. At this time, the one-way plate 26 can be pushed open, allowing the precipitate to enter the lower cavity 280 along with the rotating cylinder 21. The precipitate adhering to the surface of the rotating cylinder 21 is cleaned in the lower cavity 280. The precipitate is temporarily accumulated in the lower cavity 280. After the rotating cylinder 21 rotates a certain number of turns, it stops rotating, and the one-way plate 26 closes the channel 251 again. At this time, the sewage outlet 12 is opened, and the sundries in the lower cavity 280 are discharged. In this way of setting, the rotating speed of the rotating cylinder 21 during operation is 3 - 5 revolutions per minute, and the rotation speed is slow, with little disturbance to the stored oil in the tank body 1, so that the precipitate will not be mixed with the stored oil again. Secondly, by the method of driving the precipitate into the lower cavity 280 for cleaning by rotation, the precipitate is cleaned into the lower cavity 280 and then discharged centrally, which can improve the efficiency of discharging sundries, reduce the discharge amount of clean stored oil, and the stored oil content in the discharged impurities is low. It is not necessary to filter and recycle the stored oil from the discharged impurities again, reducing the re-filtering process and reducing costs and improving efficiency.

[0038] It should be noted that the oil storage tank provided in this application can be used for the storage of petroleum and refined petroleum products, including but not limited to the storage of diesel and engine oil.

[0039] Specifically, refer to Figure 1 、 Figure 6, on the outer peripheral surface of one end of the rotary drum 21 extending out of the outer casing, a gear 211 is provided. A driving device is provided on the outer casing, and the driving device is drivingly connected to the gear 211 to drive the rotary drum 21 to rotate about its axis. The driving device can be a servo motor, and a gear 211 is provided on the output shaft of the servo motor to mesh with the outer gear 211 for transmission.

[0040] Specifically, in actual applications, the thickness of the sediment accumulated at the bottom can be predicted by counting the amount and storage duration of the oil stored in the storage tank. When the sediment thickness reaches a predetermined value, the servo motor is controlled to work to drive the rotary drum 21 to rotate for cleaning.

[0041] Further, as a preferred embodiment, refer to Figures 5-9 , along the vertical direction, guide plates 25 are inclined towards the central region from the four circumferences at the bottom of the upper cavity 252. The outer casing is a rectangular casing, and a connecting flange 24 is connected to the top. On the four side walls of the rectangular casing, guide plates 25 are inclined towards the center from top to bottom. Refer to Figure 7 , the bottom of the guide plate 25 is lower than the highest point of the outer peripheral surface of the rotary drum 21. By this setting method, the impurities can be guided by the guide plate 25, and the lower bottom surface of the upper cavity 252 can be shrunk, which is more conducive to the impurities settling and adhering to the outer surface of the rotary drum 21. When the rotary drum 21 rotates, it can more easily drive the impurities to move together, which is more conducive to cleaning the sundries.

[0042] Further, as a specific embodiment, refer to Figure 7 、 Figure 8 、 Figure 11 、 Figure 12 , the passage 251 is rectangular and is provided at the lower end of one guide plate 25; along the axial direction of the rotary drum 21, a rotating shaft 261 is provided at the upper end of the one-way plate 26 to rotatably cooperate with the side wall of the passage 251. Specifically, the passage 251 is provided at the lower end of the guide plate 25 and coincides with the lower end. The specific structure of the rotating shaft 261 is: including a plate body and two rotating shafts 261 provided on both side surfaces of the plate body. The rotating shafts 261 are rotatably connected to the upper end of the passage 251. By the way of rotational connection and connection with the upper end of the passage 251, when the rotary drum 21 rotates, the sediment attached to the rotary drum 21 can push the lower end of the one-way plate 26, causing the one-way plate 26 to rotate around the rotating shaft 261, thereby opening the passage 251, facilitating the sediment to enter the lower cavity 280 together with the rotary drum 21. This method is pushed open by the force of the rotation of the rotary drum 21, without additional driving components. And through the connection of the rotating shaft 261, the overall structure is simple, not prone to failure, with low maintenance cost, and can adapt to the working environment inside the oil storage, and the work is stable and reliable.

[0043] Further, as a specific embodiment, refer to Figure 12, the rotating shaft 261 is non-rotationally engaged with the one-way plate 26. A limiting plate 262 is provided on the side of the one-way plate 26 close to the lower cavity 280. An elastic member for maintaining is provided between the rotating shaft 261 and the channel 251. Under the elastic force of the elastic member for maintaining, the limiting plate 262 can be abutted against the side of the channel 251 to block the channel 251.

[0044] Specifically, the elastic member for maintaining (not shown in the figure) can be a torsion spring or a tension spring. When using a tension spring, the tension spring is arranged on the side of the channel 251 close to the upper cavity 252. One end of the tension spring is connected to the one-way plate 26, and the other end is connected to the upper end of the diversion plate 25, providing an elastic force for closing the channel 251 to the one-way plate 26. The limiting plate 262 is fixed to the side of the one-way plate 26 close to the lower cavity 280 by bonding or welding. Under the elastic force of the maintaining spring, it can drive the one-way plate 26 to rotate around the axis of the rotating shaft 261 so that the limiting plate 262 abuts against the side surface of the diversion plate 25 on one side of the channel 251 to form a limit, thereby blocking and closing the channel 251. When the rotating cylinder 21 rotates, the sediment attached to the surface of the rotating cylinder 21 can push the lower end of the one-way plate 26 to deflect against the elastic force of the elastic member for maintaining, thereby opening the channel 251; by providing the maintaining spring and the limiting plate 262, through the cooperation of the two, the one-way plate 26 can be returned to the state of blocking the channel 251 when the rotating cylinder 21 does not rotate. It should be noted that the setting method of the torsion spring is common in the art, and its structure will not be elaborated here. Those skilled in the art should understand its specific setting method according to the working principle of the one-way plate 26.

[0045] Embodiment 2 As a specific implementation manner, referring to Figures 7-11 , the technical solution of the present invention is: an oil storage tank, which is different from that of Embodiment 1. As a further improvement, the filtering assembly 2 further includes: an impact chamber 29, which is arranged around the upper cavity 252. A plurality of second through holes 250 are formed through the side wall of the upper cavity 252, and the second through holes 250 are communicated with the impact chamber 29.

[0046] Specifically, the filtering component 2 includes a housing body, and flow guiding plates 25 are arranged on the peripheral surface of the housing body. The flow guiding plates 25 include two first flow guiding plates arranged along the axis direction of the rotating drum 21. The two ends of the two first flow guiding plates are hermetically connected to the opposite side walls of the housing body. It also includes two second flow guiding plates different from the opposite sides of the first flow guiding plates. The upper end parts of the second flow guiding plates are hermetically connected to the inner side wall of the housing body. A partition plate 291 connecting the first flow guiding plate and the side wall of the housing body is arranged below the first flow guiding plate. An annular plate 253 coaxial with the installation channel 28 is arranged at the lower end part of the first flow guiding plate located outside the upper cavity 252. When the rotating drum 21 is installed in the installation channel 28, the outer peripheral surface of the rotating drum 21 is in sliding sealing fit with the annular plate 253. Thus, an impact cavity 29 surrounding the upper cavity 252 is formed between the first flow guiding plate, the second flow guiding plate, the outer peripheral surface of the rotating drum 21, the inner side wall of the housing body, and the partition plate 291. Third communication ports 290 are arranged on the parts of the first flow guiding plate and the second flow guiding plate located in the impact cavity 29. Among them, the channel 251 is arranged on one first flow guiding plate. A plurality of second through holes 250 communicating the upper cavity 252 and the impact cavity 29 are uniformly arranged on both the first flow guiding plate and the second flow guiding plate. When impurities precipitate, they will also adhere to the flow guiding plate 25 and communicate with the impact cavity 29 through the arranged second through holes 250. When the tank body 1 stores oil, the stored oil can enter the impact cavity 29 through the second through holes 250. Pulse impacts are formed at intervals through the impact cavity 29. The pulse impacts can impact and extrude the stored oil in the impact cavity 29 to flow out from the second through holes 250, thereby impacting the precipitate adhering to the flow guiding plate 25, reducing the adhesion force between the precipitate and the flow guiding plate 25. After the rotating drum 21 rotates to clean the impurities adhering to the rotating drum 21, under the impact of the impact cavity 29, it is beneficial for the precipitate deposited on the flow guiding plate 25 to separate from the flow guiding plate 25 and precipitate again on the outer peripheral surface of the rotating drum 21, improving the cleanliness of the flow guiding plate 25 and reducing the probability of long-term accumulation of precipitate on the flow guiding plate 25.

[0047] Further, as a specific implementation manner, referring to Figure 7 , the opening direction of the second through hole 250 is horizontally arranged, so that the flowing direction of the liquid flow impacted when pulse impacts are generated in the impact cavity 29 is horizontal, reducing the impact disturbance on the upper layer of oil products, thereby reducing the probability of re-mixing of the precipitated impurities in the oil products; referring to Figure 7, by setting the flow deflector 25 and making the highest point of the outer peripheral surface of the rotary drum 21 higher than the lower bottom of the upper cavity 252, a deposition area 2520 can be formed between the flow deflector 25 and the rotary drum 21. The deposition area 2520 is located between the rotary drum 21 and the second through hole 250. By setting the deposition area 2520, the precipitate can accumulate in the deposition area 2520. At this time, when the pulsed liquid flow flows out through the second through hole 250, the precipitate in the deposition area 2520 can block and buffer it, and will not directly impact the outer surface of the rotary drum 21. Thus, it can ensure that the precipitate adheres to the outer peripheral surface of the pre-rotary drum 21, ensure that the precipitate can be effectively driven to move when the rotary drum 21 rotates, and ensure the cleaning effect.

[0048] Further, as a specific implementation manner, refer to Figure 1 , Figure 4 , Figure 7 , Figure 10 , further includes: An oil outlet pipe 10, arranged on the tank body 1; A buffer assembly 11, including a first cylindrical tube 111 communicated with the oil outlet pipe 10, a first plate 112 slidably arranged in the first cylindrical tube 111 in a guiding manner, a first elastic member 113 arranged between the first plate 112 and the second plate, and a first communication pipe arranged at one end of the first cylindrical tube 111 far from the oil outlet pipe 10. The first communication pipe is communicated with the impact chamber 29.

[0049] Specifically, an oil outlet pipe 10 is arranged on the oil storage tank. In a specific implementation manner, the end of the oil outlet pipe 10 is connected to an oil pump or a valve body. When it is necessary to discharge the stored oil in the oil storage tank, the stored oil in the tank body 1 is discharged by the operation of the oil pump or by opening the valve body. Among them, the first cylindrical tube 111 of the buffer assembly 11 is arranged on the oil outlet pipe 10 on the side close to the storage tank of the oil pump or the valve body. The first cylindrical tube 111 is detachably arranged on the oil outlet pipe 10 and is internally communicated with the oil outlet pipe 10 at the end. The first elastic member 113 is a compression spring. Refer to Figure 4 , in the normal state when the pump 23 body or the valve body is closed, under the elastic force of the first elastic member 113, the first plate 112 abuts against the side wall of the oil outlet pipe 10 for limiting. The outer peripheral surface of the first plate 112 is in guiding sliding sealing fit with the inner peripheral surface of the first cylindrical tube 111. When it is necessary to discharge the stored oil in the storage tank, the oil pump or the valve body is opened, and the stored oil is discharged through the oil outlet pipe 10. At this time, the first plate 112 still remains in the Figure 4 state shown. When the storage oil output is stopped and the oil pump or the valve body is closed, a water hammer effect is generated in the discharge pipe. At this time, the first plate 112 can be extruded to move in the first cylindrical tube 111; the flowing medium inside the first cylindrical tube 111 is extruded and conducted to the first communication port 1101 through the first connecting pipe 110, and then conducted to the impact chamber 29, providing a pulsed impact for the impact chamber 29. The water hammer effect can be utilized to provide an impact effect for the impact chamber 29 every time oil is taken.

[0050] It should be noted that in this embodiment, it can be applied to the storage of refined oil products in oil refining, including but not limited to the storage of diesel oil and engine oil.

[0051] Further, as a preferred embodiment, the channel 251 is arranged below the impact chamber 29 and is not communicated with the impact chamber 29. By this arrangement, since the channel 251 is not communicated with the impact chamber 29, it can be ensured that the impact chamber 29 and the channel 251 do not interfere with each other, thus ensuring the working effect of the impact chamber 29.

[0052] Further, as a specific embodiment, referring to Figure 7 , along the rotation direction 3 of the rotary drum 21, on the side of the rotary drum 21 away from the channel 251, a scraping portion 281 is further arranged below the impact chamber 29, and the scraping portion 281 is used for scraping and cleaning the outer peripheral surface of the rotary drum 21.

[0053] Specifically, the scraping portion 281 is a scraper arranged below the impact chamber 29. By arranging the scraper, when the rotary drum 21 rotates along the rotation direction 3, the surface of the rotary drum 21 can be scraped and cleaned by the scraper. The scraped sediment falls into the lower chamber 280 and is temporarily accumulated in the lower chamber 280. After the rotary drum 21 rotates 2 - 3 circles, it stops rotating. At this time, the one-way plate 26 returns to the initial state of blocking the channel 251 under the elastic force of the elastic member. At this time, the sewage outlet 12 is opened to discharge the sundries accumulated in the lower chamber 280.

[0054] Embodiment III As a specific embodiment, referring to Figures 13-16 , the technical solution of the present invention is: an oil storage tank, which is different from Embodiment I and Embodiment II. As a further improvement, in the area corresponding to the upper chamber 252, a plurality of first through holes 210 are arranged on the side wall of the rotary drum 21; the rotary drum 21 is communicated with a second connecting pipe 221, the other end of the second connecting pipe 221 is communicated with the inside of the tank body 1, and a pump 23 is arranged on the second connecting pipe 221.

[0055] Specifically, the upper end of the second connecting pipe 221 communicates with the middle area of the tank body 1 to ensure that the oil pumped out by the pump 23 is relatively clean when the pump 23 works. The lower end of the second connecting pipe 221 communicates with the inside of the rotating cylinder 21. The inside of the rotating cylinder 21 is hollow, and covers 212 are detachably and sealingly fixed at both ends. On the side wall of the rotating cylinder 21, a first through hole 210 is provided in the area corresponding to the upper cavity 252. Through this setting method, when cleaning the sediment, after the rotating cylinder 21 stops rotating, the pump 23 works to pump the stored oil into the inside of the rotating cylinder 21, and the stored oil flows out through the first through hole 210, which can backflush the outer surface of the rotating cylinder 21. At this time, the sewage outlet 12 is opened, and the stored oil pumped into the lower cavity 280 by the pump 23 can increase the pressure in the lower cavity 280 so as to accelerate the discharge of sundries. This method can improve the discharge effect of sundries and the cleanliness of the surface of the rotating cylinder 21.

[0056] Furthermore, blank areas 213 corresponding to the impact chamber 29 are provided in the two end areas. The blank areas 213 correspond to the impact chamber 29 and are sealingly matched with the annular plate 253 to form an impact chamber 29 independent of the upper cavity 252 and the lower cavity 280. Refer to Figure 8 、 Figure 10 , after the rotating cylinder 21 is disassembled from the outer shell, the area of the impact chamber 29 corresponding to the blank area 213 of the rotating cylinder 21 is open and communicates with the outside. At this time, it is convenient to flush and clean the inside of the impact chamber 29.

[0057] Furthermore, as a preferred embodiment, refer to Figures 13-16 , a rigid shaft 22 is coaxially and rotatably arranged on the rotating cylinder 21. The second connecting pipe 221 is connected to the rigid shaft 22, and an internal passage 222 communicating the second connecting pipe 221 and the inside of the rotating cylinder 21 is provided inside the rigid shaft 22.

[0058] Specifically, the rigid shaft 22 is coaxially and rotatably matched with the cover 212. A connecting head 220 is sleeved at one end, and the connecting head 220 communicates with the second connecting pipe 221. The second communication port 2210 at the end of the connecting pipe communicates with the inside of the tank body 1. A spline shaft is provided at the other end of the rigid shaft 22. A spline sleeve is sleeved on the periphery of the spline shaft. The spline sleeve is detachably and fixedly connected to the fixed column 201 through a limiting member 20, and the fixed column 201 is fixedly connected to the outer shell. An internal passage 222 communicating with the connecting head 220 is provided inside the rigid shaft 22, and an outflow port 226 communicating with the internal passage 222 is provided on the outer side wall, so that the connecting pipe communicates with the inside of the rotating cylinder 21.

[0059] Furthermore, refer to Figures 14-16, a support plate 224 is further provided in the middle area of the rigid shaft 22. An expansion member 225 is provided on the support plate 224. The expansion member 225 includes a second cylindrical barrel 2250, a piston 2252 disposed within the second cylindrical barrel 2250, and a second elastic member 2253 disposed between the end of the cylindrical barrel and the piston 2252. One end of the second cylindrical cavity is detachably and fixedly connected to the support plate 224 and communicates with the internal passage 222; a rigid rod 2251 is guidingly provided on the end plate of the second cylindrical barrel 2250. The rigid rod 2251 is connected to the piston 2252. An arc-shaped shielding plate 223 is connected to the end of the piston rod. A communication flow passage 2254 is provided on the end plate. Refer to Figure 16 , the second elastic member 2253 is a compression spring. Under the action of its elastic force, the rigid rod 2251 abuts against the end plate to form a limit and remains in Figure 16 the state shown in the figure. Refer to Figure 7 , the shielding plate 223 is in a position close to the upper cavity 252 side of the rotating cylinder 21, controlling the length of the expansion member 225. In this state, there is a certain gap between the shielding plate 223 and the inner peripheral surface of the rotating cylinder 21, where the gap is 2 - 5 millimeters. At this time, the shielding plate 223 does not contact the rotating cylinder 21, which can ensure the smooth rotation of the rotating cylinder 21.

[0060] Furthermore, when the pump 23 works to pump the stored oil into the rigid shaft 22, the pressure in the internal passage 222 increases. Since the pressure inside the rotating cylinder 21 is relatively low due to the opening of the sewage outlet 12, a pressure difference is generated on both sides of the piston 2252, and a pressure difference is generated on both sides of the piston 2252. Under the action of the pressure difference, it moves against the elastic force of the second elastic member 2253, pushing the shielding plate 223 upward to fit with the rotating cylinder 21. At this time, the first through hole 210 communicating with the upper cavity 252 is blocked, reducing the amount of stored oil flowing into the upper cavity 252 through the first through hole 210, thereby avoiding the phenomenon of impurities being washed into the upper cavity 252 and mixing with the stored oil again.

[0061] Furthermore, after the pump 23 works for a predetermined duration and stops working, and stops pumping the stored oil into the lower cavity 280, the oil pressure in the internal passage 222 decreases. After the decrease, the piston 2252 is pushed to reset under the action of the resilience of the second elastic member 2253 and returns to Figure 16 the state shown in the figure. At this time, the shielding plate 223 returns to the initial state, and its upper surface separates from the inner side wall of the rotating cylinder 21, and there is a gap between the two. At this time, the rotating cylinder 21 does not contact the shielding plate, so that the rotating cylinder can rotate better.

[0062] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all implementation manners here. And the obvious changes or variations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A petroleum storage tank, characterized in that: include: The tank body (1) has an axis arranged vertically; A filter assembly is arranged at the lower end of the tank body (1), and comprises, from top to bottom, an upper chamber (252), a lower chamber (280), and a rotating drum (21) arranged between the upper chamber (252) and the lower chamber (280), wherein the axis of the rotating drum (21) is arranged horizontally; A driving device, used for driving the rotating drum (21) to rotate around its axis; A channel (251) is provided on the side wall between the upper chamber (252) and the lower chamber (280) downstream of the rotating drum (21) in the rotation direction (3), and a one-way plate (26) is provided at the channel (251). The one-way plate (26) is configured to be able to be opened in one direction by being offset toward the direction of the lower chamber (280) when the rotating drum (21) rotates around its axis.

2. A petroleum storage tank according to claim 1, characterized in that: Along the vertical direction, guide plates (25) are arranged on all sides of the bottom of the upper chamber (252) in an inclined manner toward the central area.

3. A petroleum storage tank according to claim 2, characterized in that: The channel (251) is arranged at the lower end of a guide plate (25); along the axial direction of the rotating drum (21), the upper end of the one-way plate (26) is provided with a rotating shaft (261) that is rotatably matched with the side wall of the channel (251).

4. A petroleum storage tank according to claim 3, characterized in that: The rotating shaft (261) is non-rotatably matched with the one-way plate (26); the one-way plate (26) is provided with a limiting plate (262); and a retaining elastic member is provided between the rotating shaft (261) and the channel (251).

5. The petroleum storage tank according to claim 1, characterized in that: The filter assembly (2) further comprises: an impact chamber (29) arranged around the upper chamber (252); a plurality of second through holes (250) are provided through the side wall of the upper chamber (252); and the second through holes (250) are in communication with the impact chamber (29).

6. A petroleum storage tank according to claim 5, characterized in that: Also includes: An oil outlet pipe (10) is arranged on the tank body (1); a buffer assembly (11) comprises a first columnar tube (111) connected to the oil outlet pipe (10), a first plate (112) slidably arranged in the first columnar tube (111), a first elastic member (113) arranged between the first plate (112) and the second plate, and a first connecting pipe arranged at an end of the first columnar tube (111) away from the oil outlet pipe (10), the first connecting pipe being connected to the impact chamber (29).

7. A petroleum storage tank according to claim 6, characterized in that: The channel (251) is arranged below the impact cavity (29) and is not connected to the impact cavity (29).

8. The petroleum storage tank according to claim 7, characterized in that: A scraping portion (281) is also provided below the impact cavity (29) on a side of the rotating drum (21) away from the channel (251) along the rotation direction (3) of the rotating drum (21).

9. The petroleum storage tank according to claim 1, characterized in that: In an area corresponding to the upper chamber (252), a plurality of first through holes (210) are provided on the side wall of the rotating drum (21); the rotating drum (21) is connected to a second connecting pipe (221), the other end of the second connecting pipe (221) is connected to the interior of the tank body (1), and a pump (23) is provided on the second connecting pipe (221).

10. The petroleum storage tank according to claim 9, characterized in that: The rotating drum (21) is provided with a rigid shaft (22) for coaxial rotation, the second connecting tube (221) is connected to the rigid shaft (22), and an internal passage (222) is provided inside the rigid shaft (22) for communicating with the second connecting tube (221) and the interior of the rotating drum (21).

Images