A cleaning apparatus and cleaning process for an oil tank

Abstract

The present application relates to the technical field of cleaning equipment, in particular to a kind of cleaning equipment for oil tank and cleaning process.A kind of cleaning equipment for oil tank, including spray cylinder and adjusting cylinder.Spray cylinder is set along vertical direction and can be installed in oil tank around its own axis of rotation.Spray cylinder is set with upper opening, middle opening and lower opening along vertical direction in sequence.Adjusting cylinder is set along vertical direction and is installed on spray cylinder.Adjusting cylinder is set with upper outlet and lower outlet, and adjusting cylinder can be rotated around its own axis relative to spray cylinder.The cleaning equipment for oil tank of the present application is set by spray cylinder and adjusting cylinder cooperation, which can comprehensively clean the inside of oil tank, and can flexibly adjust the spray area according to the actual distribution of oily sludge, increase the stripping capacity of oily sludge, and improve the cleaning effect of oil tank.

Description

Technical Field

[0001] This invention relates to the field of cleaning equipment technology, and specifically to a cleaning device and cleaning process for oil tanks. Background Technology

[0002] After prolonged use, oil tanks accumulate sludge and residual media on their inner walls. If not cleaned promptly, this can lead to oil contamination, tank corrosion, measurement errors, and even safety accidents. Therefore, current oil tank cleaning methods typically involve first removing the sludge and then mechanically cleaning the tank. Further cleaning of any remaining sludge is then performed. Current oil tank cleaning primarily relies on spray ball structures, which work by using the impact force generated by high-pressure liquid jets to remove dirt. These are mainly divided into two types: fixed spray balls and rotating spray balls.

[0003] Among them, the fixed spray ball sprays high-pressure water in a specific direction through fixed nozzles. It has a simple structure and low cost, and has low requirements for the pressure and flow rate of the cleaning system. However, the impact force of the fixed spray ball is relatively weak. When facing stubborn stains, more water and cleaning agent may be needed to achieve the same cleaning effect, which may lead to water waste in some cases.

[0004] Rotary spray balls, with their dynamic spray trajectory, possess a stronger impact force, effectively removing even the most stubborn dirt and grime, representing the current mainstream technology direction for oil tank cleaning. This design not only improves cleaning efficiency but also reduces the amount of water and detergent used, thus conserving resources. Furthermore, the motion characteristics of the rotating spray balls during cleaning promote liquid circulation, further enhancing the cleaning effect. However, a single rotating spray ball cannot automatically adjust its cleaning area according to the distribution of dirt on the inner wall of the oil tank, affecting the effectiveness. While configuring multiple sets of rotating spray balls to achieve overall cleaning of the upper, middle, and lower parts of the oil tank, or specific cleaning of the upper and inner parts, or the lower and inner parts, can address the need for cleaning specific areas, this configuration method still suffers from complex installation and debugging, and high maintenance and repair costs. Summary of the Invention

[0005] This invention provides a cleaning device and process for oil tanks to solve the problem that existing rotating spray balls cannot automatically adjust the cleaning area according to the distribution differences of dirt on the inner wall of the oil tank, resulting in unsatisfactory results.

[0006] This invention provides a cleaning device for oil tanks, employing the following technical solution: A cleaning device for oil tanks includes a spray cylinder and an adjusting cylinder. The spray cylinder is vertically arranged and rotatably installed inside the oil tank. The spray cylinder has an upper opening, a middle opening, and a lower opening arranged sequentially in the vertical direction. The upper opening faces upward, the middle opening is horizontal, and the lower opening faces downward. The adjusting cylinder is vertically arranged and installed on the spray cylinder. The adjusting cylinder has an upper outlet and a lower outlet. The adjusting cylinder is rotatable relative to the spray cylinder around its own axis, and the rotation of the adjusting cylinder enables the upper outlet to connect with the upper opening and / or the lower outlet to connect with the lower opening.

[0007] Furthermore, the regulating cylinder includes an upper cylinder section and a lower cylinder section, with the upper cylinder section located above the lower cylinder section; both the upper and lower cylinder sections are covered on the spray cylinder and can rotate relative to the spray cylinder around their own axes; the upper outlet is opened on the upper cylinder section and the lower outlet is opened on the lower cylinder section.

[0008] Furthermore, the central opening is set radially inclined relative to the spray cylinder.

[0009] Furthermore, the regulating cylinder also includes a middle cylinder section, which is a cylindrical structure that runs vertically through the cylinder. The middle cylinder section is sleeved with the spray cylinder, and in the vertical direction, the middle cylinder section is located between the upper cylinder section and the lower cylinder section. The upper cylinder section and the lower cylinder section are rotatably engaged with the middle cylinder section. A middle outlet is provided on the middle cylinder section. The middle outlet is inclined along the radial direction of the spray cylinder and is always connected to the middle opening. The inclination direction of the middle outlet is the same as the inclination direction of the middle opening.

[0010] Furthermore, a water pipe is detachably installed on the oil tank, and the spray cylinder is installed on the water pipe via a connecting cylinder. The connecting cylinder is coaxial with the spray cylinder and can communicate with the spray cylinder.

[0011] Furthermore, the connecting sleeve is detachably connected to the water pipe.

[0012] Furthermore, the spray cylinder is rotatably mounted on the end of the connecting cylinder away from the water pipe via a rotating cylinder; the rotating cylinder is rotatably engaged with the connecting cylinder via ball bearings, and the rotating cylinder is coaxial with and connected to the spray cylinder; a water inlet is provided on the peripheral wall of the rotating cylinder, and water can pass through the ball bearings and the water inlet sequentially along the radial direction of the rotating cylinder.

[0013] Furthermore, a cover plate is coaxially provided at the end of the rotating cylinder away from the spray cylinder. The outer peripheral wall of the cover plate abuts against the inner peripheral wall of the connecting cylinder. Multiple water inlets are provided on the cover plate. The multiple water inlets are evenly distributed on the cover plate around the axis of the rotating cylinder. The water inlets, the ball bearings, and the water inlet are arranged sequentially in the radial direction of the rotating cylinder, and the water inlet is located on the side of the ball bearings in the radial direction of the rotating cylinder that is closer to the axis of the rotating cylinder.

[0014] Furthermore, a pressure regulating cylinder is provided between the cover plate and the rotating cylinder, and a gap is defined between the pressure regulating cylinder and the rotating cylinder to allow water to flow through; a pressure relief valve is connected to the pressure regulating cylinder.

[0015] The present invention also provides a cleaning process for oil tanks, which utilizes the above-mentioned cleaning equipment for oil tanks and includes the following steps:

[0016] S10, drive the regulating cylinder to rotate relative to the spray cylinder around its own axis, so that the upper outlet is connected to the upper opening and / or the lower outlet is connected to the lower opening;

[0017] S20, water is supplied to the spray cylinder and the spray cylinder is rotated.

[0018] The beneficial effects of this invention are as follows: The cleaning equipment for oil tanks of this invention, through the combination of a spray cylinder and an adjusting cylinder, allows the adjusting cylinder to rotate relative to the spray cylinder during use. When the upper outlet and upper opening, and the lower outlet and lower opening are simultaneously connected, water can be sprayed upwards, horizontally, and downwards respectively, providing full-area cleaning of the top, inner circumference, and bottom walls of the oil tank. When only the upper and middle parts, or the middle and lower parts, need to be cleaned, the upper outlet and upper opening, or the lower outlet and lower opening, can be connected separately. This allows for comprehensive cleaning of the oil tank's interior and flexible adjustment of the spray area according to the actual distribution of oily sludge, increasing the ability to remove oily sludge and improving the cleaning effect of the oil tank. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a cleaning mechanism installed inside an oil tank, according to an embodiment of the cleaning equipment for oil tanks of the present invention.

[0021] Figure 2 This is a front view of an embodiment of a cleaning device for an oil tank according to the present invention, showing the cleaning mechanism installed inside the oil tank.

[0022] Figure 3 for Figure 2 Sectional view at point AA along the middle;

[0023] Figure 4 This is a schematic diagram of the cleaning mechanism of an embodiment of a cleaning device for oil tanks according to the present invention;

[0024] Figure 5This is a front view of the cleaning mechanism of an embodiment of a cleaning device for oil tanks according to the present invention;

[0025] Figure 6 for Figure 5 Cross-sectional view at the middle edge BB;

[0026] Figure 7 for Figure 5 Sectional view at the center CC;

[0027] Figure 8 for Figure 7 Enlarged view of point D in the middle;

[0028] Figure 9 This is a side view of the cleaning mechanism of an embodiment of a cleaning device for oil tanks according to the present invention;

[0029] Figure 10 for Figure 9 Sectional view at the center of EE;

[0030] Figure 11 for Figure 10 Enlarged view of point F in the middle.

[0031] In the diagram: 100, oil tank; 101, oil inlet; 102, oil outlet; 103, support leg; 110, water pipe; 120, connecting flange; 200, cleaning mechanism; 210, spray cylinder; 211, upper opening; 212, middle opening; 213, lower opening; 220, regulating cylinder; 221, upper outlet; 222, lower outlet; 223, upper cylinder section; 224, lower cylinder section; 225, first connecting piece; 226, second connecting piece; 227, middle cylinder section; 228, third connecting piece; 229, middle outlet; 230, connecting cylinder; 240, rotating cylinder; 241, fourth connecting piece; 242, water inlet; 250, ball bearing; 260, cover plate; 261, bolt; 262, water outlet; 270, pressure regulating cylinder; 280, pressure relief valve. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides an embodiment of a cleaning device for oil tanks, such as... Figures 1 to 11 As shown.

[0034] A cleaning device for an oil tank 100 is disclosed, used to clean the inner wall surface of the oil tank 100. The oil tank 100 has an oil inlet 101 and an oil outlet 102. Support legs 103 are provided at the lower end of the oil tank 100 for supporting the oil tank 100. The device includes a cleaning mechanism 200, which comprises a spray cylinder 210 and an adjusting cylinder 220. The spray cylinder 210 has a spherical structure. The spray cylinder 210 is vertically oriented and rotatably mounted inside the oil tank 100. The spray cylinder 210 has an upper opening 211, a middle opening 212, and a lower opening 213 arranged sequentially in the vertical direction. The upper opening 211 faces upward, the middle opening 212 is horizontal, and the lower opening 213 faces downward.

[0035] An adjusting cylinder 220 is vertically positioned and mounted on a spray cylinder 210. The adjusting cylinder 220 has an upper outlet 221 and a lower outlet 222. The adjusting cylinder 220 can rotate relative to the spray cylinder 210 in a vertical direction, and the rotation of the adjusting cylinder 220 can connect the upper outlet 221 with the upper opening 211 and / or the lower outlet 222 with the lower opening 213.

[0036] Among them, there are at least two upper openings 211, two middle openings 212, and two lower openings 213. The number of upper outlets 221 corresponds to the number of upper openings 211, and the number of lower outlets 222 corresponds to the number of lower openings 213.

[0037] In this embodiment, by setting up a spray cylinder 210 and an adjusting cylinder 220 in cooperation, after the oil tank 100 is used, the sludge inside the oil tank 100 is first extracted and the oil tank 100 is mechanically cleaned. Then, the sludge remaining in the oil tank 100 is further cleaned.

[0038] If the upper, middle, and lower parts of the oil tank 100 all need to be cleaned, the regulating cylinder 220 is rotated relative to the spray cylinder 210, connecting the upper outlet 221 to the upper opening 211 and simultaneously connecting the lower outlet 222 to the lower opening 213. Water is then introduced into the spray cylinder 210, driving it to rotate. The water flows through the upper opening 211, middle opening 212, and lower opening 213 respectively. Water flowing through the upper opening 211 is sprayed upwards from the upper outlet 221, spraying in a rotating manner onto the inner top wall of the oil tank 100, thus removing the oily sludge from the inner top wall. Water flowing through the middle opening 212 is sprayed horizontally, spraying in a rotating manner onto the inner peripheral wall of the oil tank 100, thus removing the oily sludge from the inner peripheral wall. Water flowing through the lower opening 213 will be sprayed downwards from the lower opening 213 through the lower outlet 222, and sprayed onto the inner bottom wall of the oil tank 100 in a rotating manner, thus stripping off the sludge and oil from the inner bottom wall of the oil tank 100.

[0039] If only the upper and middle sections of the oil tank 100 require focused cleaning, or only the middle and lower sections require focused cleaning, then the regulating cylinder 220 is rotated relative to the spray cylinder 210, so that only the upper outlet 221 is connected to the upper opening 211, or only the lower outlet 222 is connected to the lower opening 213, thus concentrating the water pressure. Taking the connection between the upper outlet 221 and the upper opening 211 as an example, since the lower outlet 222 and the lower opening 213 are not connected at this time, when water enters the spray cylinder 210, the water will only flow from the upper opening 211 and the middle opening 212. Similarly, the water flowing through the upper opening 211 will be sprayed upwards from the upper opening 211 through the upper outlet 221 onto the inner top wall of the oil tank 100, and the water flowing through the middle opening 212 will be sprayed horizontally onto the inner peripheral wall of the oil tank 100, stripping the sludge and oil from the inner peripheral wall of the oil tank 100. At this time, the water pressure sprayed from the upper outlet 221 and the middle opening 212 is relatively greater, which can achieve a better cleaning effect.

[0040] That is, by rotating the regulating cylinder 220 relative to the spray cylinder 210, when the upper outlet 221 is synchronously connected to the upper opening 211 and the lower outlet 222 is synchronously connected to the lower opening 213, water can be sprayed upwards, horizontally, and downwards respectively to clean the entire area of ​​the top wall, inner peripheral wall, and inner bottom wall of the oil tank 100. When only the upper and middle parts or the middle and lower parts of the oil tank 100 need to be cleaned, the upper outlet 221 can be connected to the upper opening 211 or the lower outlet 222 to the lower opening 213 separately. This allows for comprehensive cleaning of the interior of the oil tank 100 and flexible adjustment of the spray area according to the actual distribution of the sludge, increasing the ability to remove sludge and improving the cleaning effect of the oil tank 100.

[0041] In a further embodiment, the regulating cylinder 220 includes an upper cylinder section 223 and a lower cylinder section 224, both of which are hemispherical shell structures, with the upper cylinder section 223 located above the lower cylinder section 224. Both the upper cylinder section 223 and the lower cylinder section 224 are mounted on the spray cylinder 210 and are capable of rotating relative to the spray cylinder 210 around their own axes. An upper outlet 221 is located on the upper cylinder section 223, and a lower outlet 222 is located on the lower cylinder section 224.

[0042] Specifically, the upper cylinder section 223 is covered on the spray cylinder 210 by the first connector 225, and the lower cylinder section 224 is covered on the spray cylinder 210 by the second connector 226.

[0043] The first connecting member 225 includes a first limiting pin. The first limiting pin passes through the upper cylinder section 223 and abuts against the spray cylinder 210, and the first limiting pin is screwed to the upper cylinder section 223, so that when the first limiting pin connects the upper cylinder section 223 and the spray cylinder 210, the first limiting pin will restrict the upper cylinder section 223 from rotating in the vertical direction relative to the spray cylinder 210 through friction.

[0044] The second connector 226 includes a second limiting pin. The second limiting pin passes through the lower cylinder section 224 and abuts against the spray cylinder 210, and the second limiting pin is screwed to the lower cylinder section 224, so that when the second limiting pin connects the lower cylinder section 224 and the spray cylinder 210, the second limiting pin will restrict the lower cylinder section 224 from rotating in the vertical direction relative to the spray cylinder 210 through friction.

[0045] In this embodiment, by setting up an upper cylinder section 223 and a lower cylinder section 224, before cleaning, the operator manually rotates and adjusts the upper cylinder section 223 and the lower cylinder section 224 according to the area inside the oil tank 100 that needs to be cleaned. That is, when the upper, middle and lower parts of the oil tank 100 need to be thoroughly cleaned, the upper outlet 221 on the upper cylinder section 223 is connected to the upper opening 211 on the spray cylinder 210, and at the same time, the lower outlet 222 on the lower cylinder section 224 is connected to the lower opening 213 on the spray cylinder 210. When only the upper and middle parts of the oil tank 100 need to be cleaned, only the upper outlet 221 on the upper cylinder section 223 is connected to the upper opening 211 on the spray cylinder 210, and the lower outlet 222 on the lower cylinder section 224 is misaligned with the lower opening 213 on the spray cylinder 210, so that they are no longer connected. Then, the upper cylinder section 223 and the spray cylinder 210 are connected by the first limiting pin, and the lower cylinder section 224 is connected by the second limiting pin, so that during cleaning, both the upper cylinder section 223 and the lower cylinder section 224 can rotate synchronously with the spray cylinder 210.

[0046] In a further embodiment, the central opening 212 is arranged radially inclined relative to the spray cylinder 210.

[0047] Similar to existing technologies, this embodiment arranges the central opening 212 at a radial angle relative to the spray cylinder 210. When high-pressure water enters the spray cylinder 210, the water flowing out of the central opening 212 causes the entire spray cylinder 210 to rotate. See also... Figure 7 As shown, the spray cylinder 210 rotates clockwise at the angle shown in the figure.

[0048] Furthermore, the regulating cylinder 220 also includes a middle cylinder section 227, which is a cylindrical structure extending vertically. The middle cylinder section 227 is sleeved with the spray cylinder 210 via a third connector 228. In the vertical direction, the middle cylinder section 227 is located between the upper cylinder section 223 and the lower cylinder section 224, both of which are rotatably engaged with the middle cylinder section 227. A middle outlet 229 is provided on the middle cylinder section 227. The middle outlet 229 is inclined along the radial direction of the spray cylinder 210 and is always connected to the middle opening 212. The inclination direction of the middle outlet 229 is the same as that of the middle opening 212.

[0049] The number of outlets 229 corresponds to the number of openings 212. The third connector 228 includes a third limiting pin. The third limiting pin passes through the middle cylinder section 227 and abuts against the spray cylinder 210, and is screwed to the middle cylinder section 227. This allows the third limiting pin to restrict the rotation of the middle cylinder section 227 relative to the spray cylinder 210 in the vertical direction by friction when connecting the middle cylinder section 227 and the spray cylinder 210. In this embodiment, the third limiting pin is not removed unless necessary after installation.

[0050] Specifically, the middle section 227 and the upper section 223 are connected by a first pin, and the middle section 227 and the lower section 224 are connected by a second pin. The upper section 223 has a first annular groove, and the first pin passes through the middle section 227 and is inserted into the first annular groove. The lower section 224 has a second annular groove, and the second pin passes through the middle section 227 and is inserted into the second annular groove.

[0051] In a further embodiment, a water pipe 110 is detachably installed on the oil tank 100, and a spray cylinder 210 is installed on the water pipe 110 via a connecting cylinder 230. The connecting cylinder 230 is coaxial with the spray cylinder 210 and can communicate with the spray cylinder 210.

[0052] Water pipe 110 is installed on oil tank 100 via connecting flange 120. Oil tank 100 is equipped with a top cover. When it is necessary to clean oil tank 100, the top cover is first removed, and then water pipe 110 is installed on oil tank 100 via connecting flange 120. An external water pump is then connected to supply water to water pipe 110.

[0053] Furthermore, the upper end of the connecting cylinder 230 is detachably connected to the water pipe 110. Specifically, the connecting cylinder 230 is screwed to the water pipe 110. Alternatively, the connecting cylinder 230 is snapped into the water pipe 110.

[0054] In a further embodiment, the spray cylinder 210 is rotatably mounted on the end of the connecting cylinder 230 away from the water pipe 110 via a rotating cylinder 240, specifically at the lower end of the connecting cylinder 230. The rotating cylinder 240 is rotatably engaged with the connecting cylinder 230 via ball bearings 250, and the rotating cylinder 240 is coaxial with and communicates with the spray cylinder 210. A water inlet 242 is provided on the peripheral wall of the rotating cylinder 240, and water can pass sequentially through the ball bearings 250 and the water inlet 242 along the radial direction of the rotating cylinder 240.

[0055] The lower end of the rotating cylinder 240 is screwed to the spray cylinder 210 and locked by the fourth connector 241. The fourth connector 241 includes a fourth limiting pin, which passes through the spray cylinder 210 and abuts against the connecting cylinder 230. The fourth limiting pin is screwed to the spray cylinder 210, so that when the fourth limiting pin connects the spray cylinder 210 and the connecting cylinder 230, the fourth limiting pin will restrict the relative rotation of the spray cylinder 210 and the connecting cylinder 230 through friction.

[0056] Specifically, a cover plate 260 is provided at the upper end of the rotating cylinder 240 away from the spray cylinder 210. The cover plate 260 is coaxial with the rotating cylinder 240 and is installed inside the connecting cylinder 230 by bolts 261. The diameter of the cover plate 260 is larger than the diameter of the rotating cylinder 240. The outer peripheral wall of the cover plate 260 abuts against the inner peripheral wall of the connecting cylinder 230. Multiple water passages 262 are provided on the cover plate 260, and the multiple water passages 262 are evenly distributed on the cover plate 260 around the axis of the rotating cylinder 240. The water passages 262, the ball bearings 250, and the water inlet 242 are arranged sequentially in the radial direction of the rotating cylinder 240, and the water inlet 242 is located on the side of the ball bearings 250 in the radial direction of the rotating cylinder 240 closer to the axis of the rotating cylinder 240.

[0057] In this embodiment, by setting up a rotating cylinder 240 and ball bearings 250, when water enters the connecting cylinder 230, the water will flow downward from the water outlet 262 through the ball bearings 250 to the water inlet 242, and finally enter the spray cylinder 210 from the water inlet 242. Furthermore, by directing the water to flow into the rotating cylinder 240 along the radial direction through the ball bearings 250, the water pressure can exert an upward force on the rotating cylinder 240 as the water passes through the ball bearings 250, thus distributing the pressure exerted on the ball bearings 250 by the rotating cylinder 240, the spray cylinder 210, and the regulating cylinder 220, thereby reducing the wear on the ball bearings 250.

[0058] In another possible embodiment, a pressure regulating cylinder 270 is disposed between the cover plate 260 and the rotating cylinder 240, the pressure regulating cylinder 270 being fixedly connected to the cover plate 260 and being an integrally formed structure. The pressure regulating cylinder 270 is placed on the rotating cylinder 240, and a gap is defined between the pressure regulating cylinder 270 and the rotating cylinder 240 to allow water flow. A pressure relief valve 280 is connected to the pressure regulating cylinder 270.

[0059] After water passes through the inlet 262, it will enter the pressure regulating cylinder 270 through the gap between the pressure regulating cylinder 270 and the rotating cylinder 240. When the pressure regulating cylinder 270 is full of water, the water pressure inside is a first preset value, and the pressure relief valve 280 can be activated when the water pressure inside the pressure regulating cylinder 270 is greater than a second preset value to discharge water and relieve pressure.

[0060] That is, after the water fills the inner cavity of the regulating cylinder 220, the water pressure will act on the ball bearing 250 through the rotating cylinder 240. Therefore, by setting the water pressure in the pressure regulating cylinder 270 to start depressurizing before reaching the first preset value, the water pressure in the pressure regulating cylinder 270 is always lower than the first preset value, adjusting the pressure between the rotating cylinder 240 and the ball bearing 250, thereby limiting the rotation speed of the spray cylinder 210 and preventing the spray cylinder 210 from rotating too fast.

[0061] Alternatively, when the upper outlet 221 is connected to the upper opening 211 and the lower outlet 222 is connected to the lower opening 213, the pressure relief valve 280 can be activated when the water pressure in the pressure regulating cylinder 270 is greater than the second preset value, thus discharging water to relieve pressure. When the upper outlet 221 is connected to the upper opening 211 or the lower outlet 222 is connected to the lower opening 213, the pressure relief valve 280 can be activated when the water pressure in the pressure regulating cylinder 270 is greater than the third preset value, thus discharging water to relieve pressure, and the first preset value is greater than the third preset value, and the third preset value is greater than the second preset value.

[0062] This setting is because during partial cleaning of the oil tank 100, the water pressure is concentrated, resulting in increased pressure as the water flows out from the central opening 212 through the central outlet 229, thus increasing the rotation speed of the spray cylinder 210. At this time, the pressure relief valve 280 increases the water pressure inside the pressure regulating cylinder 270, increasing the pressure between the ball bearing 250 and the rotating cylinder 240, controlling the rotation speed of the rotating cylinder 240 and the spray cylinder 210, and preventing the spray cylinder 210 from rotating too fast, which would reduce the cleaning effect. Even if the water pressure in the pressure regulating cylinder 270 increases from the second preset value to the third preset value, the third preset value is still less than the first preset value; that is, the water pressure inside the pressure regulating cylinder 270 after adjustment is still less than the water pressure inside the pressure regulating cylinder 270 when it is full of water. Based on the above embodiment, the specific working process is as follows:

[0063] After use, the fluid oil in tank 100 needs to be transferred to a recovery tank before mechanical cleaning. The specific process is as follows: Select crude oil of the same type as the oil in tank 100 as the cleaning oil, and operate according to the existing homogeneous oil circulation cleaning process in mechanical cleaning. That is, after the cleaning machine is heated and pressurized, the cleaning operation begins, breaking down and dissolving the solid sludge inside tank 100 to improve its fluidity. Simultaneously, a pipeline is led out from the cleaning machine outlet to send a portion of the homogeneous oil to the first-stage separation skid of the three-phase separation equipment. A horizontal centrifuge in the first-stage separation skid preliminarily removes the solid residue from the sludge. The solid residue phase is directly bagged and transported off-site, while the liquid phase oil is returned to the homogeneous oil circulation pipeline. Furthermore, to ensure safety, nitrogen is introduced into tank 100, and oxygen content is monitored.

[0064] After the homogeneous oil cleaning is completed, most of the sediment, including solids, inside oil tank 100 has been removed. The subsequent operation follows the traditional mechanical tank cleaning process with circulating water. Specifically, the inside of oil tank 100 is cleaned with hot water. The cleaned water can be recycled, and the oil and water are separated in an oil-water separator. The oil is sent to a recovery tank, and the water is reheated and pressurized before being sent to the cleaning machine to clean oil tank 100. If the oil separation effect in the oil-water separator is insufficient, a three-phase separation device can be activated for synergistic treatment, ultimately completing the circulating water cleaning process.

[0065] The sludge in tank 100 is then fed into a hydrocyclone. Under centrifugal force, the denser solid particles are thrown against the outer wall of the hydrocyclone and gradually move downwards, exiting from the bottom. The oil-water mixture is discharged from the overflow port and enters a subsequent three-phase separator or other separation equipment for further oil-water separation. Alternatively, separation can be performed directly using a three-phase separator.

[0066] Then, the remaining oily sludge inside the oil tank 100 is further cleaned. Before cleaning, the operator manually rotates and adjusts the upper cylinder section 223 and the lower cylinder section 224 according to the area inside the oil tank 100 that needs to be cleaned.

[0067] That is, when a comprehensive cleaning of the upper, middle, and lower parts of the oil tank 100 is required, the upper outlet 221 on the upper cylinder section 223 is connected to the upper opening 211 on the spray cylinder 210, and simultaneously the lower outlet 222 on the lower cylinder section 224 is connected to the lower opening 213 on the spray cylinder 210. When only the upper and middle parts of the oil tank 100 need to be cleaned, only the upper outlet 221 on the upper cylinder section 223 is connected to the upper opening 211 on the spray cylinder 210, and the lower outlet 222 on the lower cylinder section 224 is misaligned with the lower opening 213 on the spray cylinder 210, so they are no longer connected. Then, the upper cylinder section 223 and the spray cylinder 210 are connected using the first limiting pin, and the lower cylinder section 224 and the spray cylinder 210 are connected using the second limiting pin.

[0068] Then, the water pipe 110 is installed on the oil tank 100 through the connecting flange 120, and an external water pump is connected to supply water to the water pipe 110. After the water enters the connecting cylinder 230 through the water pipe 110, the water will flow down from the water outlet 262 through the ball bearing 250 to the water inlet 242, and finally enter the spray cylinder 210 from the water inlet 242.

[0069] Taking the example where the upper outlet 221 of the upper cylindrical section 223 is connected to the upper opening 211 of the spray cylinder 210, and the lower outlet 222 of the lower cylindrical section 224 is connected to the lower opening 213 of the spray cylinder 210, water enters the spray cylinder 210 and flows to the upper opening 211, the middle opening 212, and the lower opening 213 respectively. Water flowing through the upper opening 211 will be sprayed upwards from the upper outlet 221, spraying onto the inner top wall of the oil tank 100 in a rotating manner, thus stripping away the sludge and oil from the inner top wall of the oil tank 100. Water flowing through the middle opening 212 will be sprayed horizontally, spraying onto the inner peripheral wall of the oil tank 100 in a rotating manner, thus stripping away the sludge and oil from the inner peripheral wall of the oil tank 100 and causing the entire spray cylinder 210 to rotate. Water flowing through the lower opening 213 will be sprayed downwards from the lower opening 213 through the lower outlet 222, and sprayed onto the inner bottom wall of the oil tank 100 in a rotating manner, thus stripping off the sludge and oil from the inner bottom wall of the oil tank 100.

[0070] The present invention also provides an embodiment of a cleaning process for oil tanks, utilizing the above-described cleaning equipment for oil tanks, comprising the following steps:

[0071] S10, drive the regulating cylinder 220 to rotate relative to the spray cylinder 210 around its own axis, so that the upper outlet 221 is connected to the upper opening 211 and / or the lower outlet 222 is connected to the lower opening 213.

[0072] S20, water is passed into the spray cylinder 210 and the spray cylinder 210 is rotated.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cleaning device for oil tanks, characterized in that: The system includes a spray cylinder and an regulating cylinder. The spray cylinder is vertically mounted inside the oil tank and is rotatable about its own axis. The spray cylinder has an upper opening, a middle opening, and a lower opening arranged vertically in sequence. The upper opening faces upward, the middle opening is horizontal, and the lower opening faces downward. The regulating cylinder is vertically mounted on the spray cylinder and has an upper outlet and a lower outlet. The regulating cylinder is rotatable relative to the spray cylinder about its own axis, and this rotation allows the upper outlet to connect with the upper opening and / or the lower outlet to connect with the lower opening. The regulating cylinder includes an upper section, a middle section, and a lower section, with the upper section located above the lower section. Both the upper and lower sections cover the spray cylinder and are rotatable relative to the spray cylinder about their own axes. The upper outlet is located on the upper section. The upper section has a lower outlet located on the lower cylinder section, with the central opening inclined relative to the radial direction of the spray cylinder. The middle cylinder section is a vertically continuous cylindrical structure, sleeved with the spray cylinder, and vertically positioned between the upper and lower cylinder sections. Both the upper and lower cylinder sections are rotatably fitted with the middle cylinder section. A central outlet is located on the middle cylinder section, inclined along the radial direction of the spray cylinder and always connected to the central opening, with the inclination direction of the outlet being the same as that of the central opening. The upper cylinder section is fitted onto the spray cylinder via a first connecting member, which includes a first limiting pin. The first limiting pin passes through the upper cylinder section and abuts against the spray cylinder, and is screwed to the upper cylinder section. If the upper, middle, and lower parts of the oil tank all require cleaning, the regulating cylinder is rotated relative to the spray cylinder. The upper outlet is connected to the upper opening, and simultaneously the lower outlet is connected to the lower opening. If only the upper and middle parts of the oil tank require focused cleaning, or the middle and lower parts require focused cleaning, the regulating cylinder is rotated relative to the spray cylinder to connect only the upper outlet to the upper opening, or only the lower outlet to the lower opening. A water pipe is detachably installed on the oil tank. The spray cylinder is installed on the water pipe via a connecting cylinder, which is coaxial with and connected to the spray cylinder. The spray cylinder is rotatably installed on the end of the connecting cylinder away from the water pipe via a rotating cylinder. The rotating cylinder is rotatably engaged with the connecting cylinder via ball bearings, and is coaxial with and connected to the spray cylinder. A water inlet is provided on the peripheral wall of the rotating cylinder, and water can... The water flows through the ball bearings and the water inlet in sequence along the radial direction of the rotating cylinder. A cover plate is coaxially installed at the end of the rotating cylinder away from the spray cylinder. The outer peripheral wall of the cover plate abuts against the inner peripheral wall of the connecting cylinder. Multiple water inlets are opened on the cover plate and are evenly distributed around the axis of the rotating cylinder. The water inlets, ball bearings, and water inlet are arranged sequentially in the radial direction of the rotating cylinder, and the water inlet is located on the side of the ball bearings closer to the axis of the rotating cylinder in the radial direction. When water enters the connecting cylinder, the water flows downward from the water inlet through the ball bearings to the water inlet. The water pressure applies an upward force to the rotating cylinder, sharing the pressure exerted on the ball bearings by the rotating cylinder, spray cylinder, and regulating cylinder, and reducing the wear of the ball bearings.

2. The cleaning equipment for oil tanks according to claim 1, characterized in that: A pressure regulating cylinder is installed between the cover plate and the rotating cylinder, and a gap is defined between the pressure regulating cylinder and the rotating cylinder to allow water to flow through; a pressure relief valve is connected to the pressure regulating cylinder.

3. A cleaning process for oil tanks, utilizing the oil tank cleaning equipment as described in claim 1 or 2, characterized in that: Includes the following steps: S10, drive the regulating cylinder to rotate relative to the spray cylinder around its own axis, so that the upper outlet is connected to the upper opening and / or the lower outlet is connected to the lower opening; S20, water is supplied to the spray cylinder and the spray cylinder is rotated.

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